WO2024024247A1 - 接着剤組成物、有機繊維材料、ゴム物品、有機繊維-ゴム複合体及びタイヤ - Google Patents
接着剤組成物、有機繊維材料、ゴム物品、有機繊維-ゴム複合体及びタイヤ Download PDFInfo
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- WO2024024247A1 WO2024024247A1 PCT/JP2023/019569 JP2023019569W WO2024024247A1 WO 2024024247 A1 WO2024024247 A1 WO 2024024247A1 JP 2023019569 W JP2023019569 W JP 2023019569W WO 2024024247 A1 WO2024024247 A1 WO 2024024247A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J109/00—Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09J109/06—Copolymers with styrene
- C09J109/08—Latex
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J107/00—Adhesives based on natural rubber
- C09J107/02—Latex
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0042—Reinforcements made of synthetic materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0091—Complexes with metal-heteroatom-bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J109/00—Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J111/00—Adhesives based on homopolymers or copolymers of chloroprene
- C09J111/02—Latex
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/152—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen having a hydroxy group bound to a carbon atom of a six-membered aromatic ring
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/395—Isocyanates
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/03—Polysaccharides or derivatives thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/59—Polyamides; Polyimides
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/59—Polyamides; Polyimides
- D06M15/592—Polyamides; Polyimides made from polymerised unsaturated fatty acids and polyamines
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/61—Polyamines polyimines
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/019—Specific properties of additives the composition being defined by the absence of a certain additive
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/34—Polyamides
Definitions
- the present invention relates to adhesive compositions, organic fiber materials, rubber articles, organic fiber-rubber composites, and tires.
- organic fibers such as tire cords made of nylon fibers, polyester fibers, etc.
- rubber compositions such as rubber compositions for tires are bonded together to form organic fiber-rubber composites. It is done with the body.
- adhesion a commonly used method is to coat organic fibers with an adhesive composition, embed them in a rubber composition, and co-vulcanize them with the rubber composition.
- a solvent is generally used for the purpose of adjusting the viscosity of the adhesive composition, but since the solvent evaporates in this step, the solvent is It is preferable to use water that has a low environmental impact. Furthermore, when coating the organic fibers with the adhesive composition by dipping, the adhesive composition must have a viscosity low enough to be coated by dipping.
- components contained in an aqueous adhesive composition that is water-based that is, has the property of being soluble or dispersible in water, need to have a polar molecular structure.
- polymeric materials such as rubber and organic fibers that serve as adherends have low polarity, and there is a large difference between the surface polarity of the rubber and organic fibers and the polarity of the components contained in the adhesive composition. This makes it difficult to bond. Therefore, in order to use the water-based adhesive composition as an adhesive composition for rubber articles, the components contained in the water-based adhesive composition must be polar because they are water-based.
- water-based adhesive compositions that have the ability to meet these conflicting demands are preferably used.
- the organic fiber cord 1 is unwound from an unwinding roll, conveyed by the roll, and dipped in the adhesive composition 2 in a dipping bath 3 containing the adhesive composition 2. .
- the organic fiber cord 4 coated with the adhesive composition 2 is pulled up from the dipping bath 3, and excess adhesive composition 2 is removed by a squeezing roll 5.
- the organic fiber cord 4 coated with the adhesive composition 2 is further conveyed by rolls and dried in a drying zone 6, and in a hot zone 7, the resin is thermally cured while being stretched by applying tension to the In rise zone 8, the tension is accurately adjusted and normalized to achieve the desired strength and elongation properties, while the resin is thermally cured, cooled in air outside the zone, and then wound onto a take-up roll. It will be done. In this way, the organic fibers are coated with the adhesive composition.
- a composition containing a rubber latex component such as rubber glue has been used for a long time.
- RFL (resorcinol-formaldehyde-latex) adhesive compositions have been found which are obtained by aging a mixture containing resorcinol, formaldehyde and rubber latex, after which the RFL adhesive composition is treated with a specific adhesion promoter.
- Mixed adhesive compositions have been used (see Patent Documents 1 to 4).
- an adhesive composition (patented) consisting of a water-dispersible rubber latex component and a water-based phenolic resin obtained by mixing and aging water-soluble resorcinol and formaldehyde is known.
- Document 1 was found to have the ability to both adhere to rubber as an adherend and to adhere to the surface of less polar base materials such as organic fibers, and is widely used worldwide. There is.
- the RFL adhesive composition it first contains a rubber latex component to adhere to the adhered rubber side through co-vulcanization, and on the other hand, it contains a resorcinol as a component that improves adhesion to the organic fiber base material.
- the phenolic resin component which is a condensation product of formaldehyde and formaldehyde, firmly adheres to the adhered substrate side.
- resorcinol is preferably used is that it can provide a phenolic condensation resin, which is a resin type with high fracture resistance and high adhesiveness to resin adherends.
- the polar functional group to be introduced is a hydroxyl group that has relatively low polarity and does not easily cause steric hindrance, and can provide a resin component that has high adhesiveness to the organic fiber base material side.
- the RFL adhesive composition is obtained by mixing and aging resorcinol, formaldehyde, and rubber latex using rosin acid or the like as an emulsifier during polymerization in the presence of a basic composition. .
- rosin acid or the like as an emulsifier during polymerization in the presence of a basic composition.
- the water-soluble resorcin and formaldehyde are condensed in a resol-type condensation reaction under a base (see Patent Document 2), and the rosin acid on the latex surface interacts with the terminal methylol group of the resol-type phenol-formaldehyde addition condensate. It is presumed that addition condensation occurs (see Non-Patent Document 1).
- the latex crosslinks with the resorcinol-formaldehyde condensate via rosin acid, strengthening the adhesion, and the latex complexes with the aqueous resin to become an encapsulated protective colloid, as shown in Figure 1.
- the rubber tackiness of the latex is suppressed, there is less staining of the device due to adhesion of the adhesive composition.
- the adhesion promoter added to the RFL adhesive composition is water-based, that is, water-based, in order to improve adhesion to the surface of a less polar base material such as an organic fiber cord. Adhesion promoters with soluble or dispersible properties have been used.
- water-dispersible adhesion promoters examples include (blocked) isocyanates such as methylene diphenyl diisocyanate with a particle size of 0.01 to 0.50 ⁇ m (see Patent Document 3), and non-blocked isocyanates such as cresol novolac type polyfunctional epoxy resins. Water-dispersed particles of water-soluble phenolic/novolac type resin (see Patent Document 4) are used.
- adhesion promoters containing water-soluble groups include a sodium hydroxide solution of a novolac-type condensate obtained by reacting resorcinol and formaldehyde to form a novolak (see Patent Document 5), and a novolak-type condensate of chlorophenols and formaldehyde.
- Phenolic resins that dissolve in water in the presence of a basic substance such as an ammonium solution of a condensate, and aqueous urethane compounds that have a (thermally dissociable blocked) isocyanate group and a group that is self-soluble in water has been proposed.
- adhesive compositions made of rubber latex and lignin resin are known as adhesive compositions that do not contain resorcinol and formaldehyde.
- Patent Document 10 discloses a gene copolymer latex containing an aliphatic polyaminoamide compound, a coating liquid composition for offset printing paper using the same, and the like.
- the coating liquid composition disclosed in Patent Document 10 is a coating composition for coating not both rubber and resin surfaces but one side of the resin surface, and is an adhesive composition that does not contain resorcin and formaldehyde.
- adhesive compositions of adherent rubber and adherent resin containing polyacrylamide there is little knowledge about adhesive compositions of adherent rubber and adherent resin containing polyacrylamide.
- such adhesive compositions that do not contain resorcin and formaldehyde do not suppress the tackiness of rubber latex unless they are coated with a condensate of resorcin and formaldehyde. Adhesion to the device roughens the surface of the adhesive coating, which tends to reduce adhesion. Furthermore, because crosslinking between the latex component and the resorcinol-formaldehyde condensate cannot be achieved, the adhesiveness between the organic fiber and the coated rubber composition is lower than that of conventional RFL adhesive compositions. It also had its challenges.
- a water-based adhesive composition is prepared by mixing polyphenol mixed with rubber latex with aromatic dialdehyde such as terephthalaldehyde or 2,5-furandicarboxaldehyde, which has a low solubility in water.
- aromatic dialdehyde such as terephthalaldehyde or 2,5-furandicarboxaldehyde
- the aromatic dialdehyde was difficult to dissolve in water during production, resulting in insufficient workability.
- the adhesive composition solution preparation process compared to a condensate of resorcinol and formaldehyde, which is soluble in water even without the addition of alkali, the adhesive composition solution preparation process generally results in a condensate of aromatics and aromatic dialdehydes, which have low water solubility. will be made water soluble by adding alkali to the phenolic group.
- the amount of base contained in the adhesive composition increases in the subsequent vulcanization bonding with the adhered rubber, and the vulcanization reaction of the rubber latex contained therein is generally accelerated, so that Another problem was that the adhesion deteriorated due to overvulcanization.
- the above-mentioned adhesive compositions that do not contain resorcinol also have the problem of reducing the cord strength of the organic fiber cord coated with the adhesive composition.
- the present invention provides an adhesive composition that can ensure desired adhesiveness without using resorcin and does not impair workability during use, as well as organic fiber materials and rubber articles using the same.
- An object of the present invention is to provide an organic fiber-rubber composite and a tire.
- the present inventor has conducted extensive research on the composition of adhesive compositions, and has discovered that, together with a prescribed rubber latex, a compound containing an amide group and an amino group, and a (thermally dissociable blocked) isocyanate. It has been discovered that by blending an aqueous compound having a group, it is possible to secure desired adhesive properties without using resorcinol, and to obtain an adhesive composition that does not impair workability during use. , we have completed the present invention. That is, the gist of the adhesive composition, organic fiber material, rubber article, organic fiber-rubber composite, and tire of the present invention is as follows.
- the above (A) rubber latex having an unsaturated diene includes natural rubber (NR), isoprene rubber (IR), styrene-butadiene copolymer rubber (SBR), butadiene rubber (BR), and ethylene-propylene-diene rubber. (EPDM), chloroprene rubber (CR), halogenated butyl rubber, acrylonitriole-butadiene copolymer rubber (NBR), and vinylpyridine-styrene-butadiene copolymer rubber (Vp).
- the above (B) compound containing an amide group and an amino group in one molecule is (B-1) an amide condensate of a polyamine and a polyvalent fatty acid, or (B-2) an amide condensate of a polyamine and a polyvalent fatty acid.
- the adhesive composition according to any one of [1] to [3], which is an epoxy adduct of.
- the compound containing an amide group and an amino group in one molecule (B) is a compound obtained by condensing a dimer acid obtained from an unsaturated fatty acid with a polyamine, any one of [1] to [4] The adhesive composition described in .
- the compound containing an amide group and an amino group in one molecule (B) is any one of [1] to [5], which is a compound obtained by condensing a dimer acid obtained from tall oil fatty acid with a polyamine.
- the (C) aqueous compound having a (thermally dissociable blocked) isocyanate group is an addition product of (C-1) a polyisocyanate having an aromatic ring and a blocking agent having one or more active hydrogen groups.
- the (C) aqueous compound having a (thermally dissociable blocked) isocyanate group is an aqueous urethane compound having (C-2) (thermally dissociable blocked) isocyanate group, [1] to [6] ]
- the adhesive composition according to any one of the above.
- the mixing ratio of each to the total amount of ( ⁇ ), ( ⁇ ), ( ⁇ ) and ( ⁇ ) is Regarding ( ⁇ ), 40% by mass or more and 85% by mass or less, For ( ⁇ ), 5% by mass or more and 35% by mass or less, ( ⁇ ) is 5% by mass or more and 35% by mass or less, and Regarding ( ⁇ ), 5% by mass or more and 35% by mass or less, A reaction product obtained by mixing and reacting
- the aqueous urethane compound having the (C-2) (thermally dissociable blocked) isocyanate group has the following general formula (1): [In formula (1), A is a residue of an organic polyisocyanate compound from which an active hydrogen group has been removed; X is a residue from which an active hydrogen group has been removed from a polyol compound having 2 or more and 4 or less hydroxyl groups and having a number average molecular weight of 5,000 or less; Y is a residue of a thermally dissociable blocking agent from which the active hydrogen group has been removed; Z is a residue from which an active hydrogen group has been removed from a compound having at least one active hydrogen group and at least one salt-forming group or a hydrophilic polyether chain; n is an integer between 2 and 4, p+m is an integer between 2 and 4 (m ⁇ 0.25)
- the adhesive composition according to [9] or [10] which is represented by:
- aqueous component (D) having multiple phenolic hydroxy groups in the molecule is a plant-derived component having multiple phenolic hydroxy groups in the molecule.
- Adhesive composition as described in one.
- polyvalent metal salt (E) is a metal salt that is water-soluble and forms a 4-coordinated or 6-coordinated polyvalent metal ion.
- the organic fiber cord is preferably first twisted and first twisted (that is, the organic fiber cord is preferably a cord formed by twisting a plurality of filaments together, and the organic fiber cord is a cord formed by twisting a plurality of filaments together.
- the fiber thickness of the twisted cord is 100 dtex to 5000 dtex, and the number of twists is 10 to 50 times/10 cm,
- an adhesive composition that can ensure desired adhesiveness without using resorcin and does not impair workability during use, as well as organic fiber materials and rubber articles using the same.
- Organic fiber-rubber composites and tires can be provided.
- FIG. 1 is a schematic cross-sectional view showing an example of an organic fiber-rubber composite of the present invention.
- the adhesive composition of the present invention comprises (A) a rubber latex having an unsaturated diene, (B) a compound containing an amide group and an amino group in one molecule, and (C) a (thermally dissociable blocked) isocyanate group. and an aqueous compound having the following.
- the adhesive composition of the present invention by having the above structure, it is possible to obtain good adhesion without using resorcinol, and in particular, it is possible to obtain good adhesion between the organic fiber and the coated rubber composition. can be ensured in good condition.
- (A) the rubber latex having an unsaturated diene can improve the adhesion between the adhesive composition and the adhered rubber, contributing to the improvement of the adhesion.
- (B) a compound containing an amide group and an amino group in one molecule and (C) an aqueous compound having a (thermally dissociable blocked) isocyanate group shear strain of the adhesive liquid can be reduced.
- the adhesive composition of the present invention has excellent storage stability because (B) the compound containing an amide group and an amino group in one molecule stabilizes the dispersion state of the (A) rubber latex containing an unsaturated diene. In good condition. Therefore, according to the adhesive composition of the present invention, desired adhesiveness can be obtained without using resorcinol, and workability during use can also be ensured favorably.
- the adhesive composition of the present invention there is no need to use resorcinol, so that the environmental load can also be reduced. Therefore, the adhesive composition of the present invention can be free of resorcinol. Moreover, it is preferable that the adhesive composition of the present invention further does not contain formaldehyde. In this case, the environmental load can be further reduced.
- the adhesive composition of the present invention further includes (D) an aqueous component having a plurality of phenolic hydroxy groups in the molecule, and (E) one or more components selected from the group consisting of polyvalent metal salts. is preferred. In this case, excellent adhesiveness and mechanical stability can be achieved even when formaldehyde and resorcinol are not included.
- the adhesive composition of the present invention has high adhesiveness to rubber, it is preferable as an adhesive composition for adhesion to rubber. Further, the adhesive composition of the present invention has high adhesiveness to organic fibers, and therefore is preferable as an adhesive composition for bonding with organic fibers. Furthermore, since the adhesive composition of the present invention has high adhesiveness to both rubber and organic fibers, it is more preferable as an adhesive composition for bonding rubber and organic fibers. In particular, the adhesive composition of the present invention is useful when applied to organic fiber cords described below.
- the rubber latex having an unsaturated diene includes a synthetic rubber latex having an unsaturated diene and a natural rubber latex.
- the synthetic rubber latex containing an unsaturated diene in the adhesive composition of the present invention means a synthetic rubber latex containing an unsaturated diene that is vulcanizable with sulfur.
- the rubber latex having an unsaturated diene contained in the adhesive composition is an adhesive layer of the adhesive composition and its adherend, similar to the above-mentioned rubber glue. This is a component for adhering to the coating rubber composition.
- the rubber latex containing an unsaturated diene is compatible with the rubber polymer contained in the coated rubber composition that is the adherend, and furthermore, the unsaturated diene portion co-vulcanizes, resulting in rubber co-vulcanization adhesion. form.
- the adhesive composition of the present invention containing (A) a rubber latex having an unsaturated diene, it is possible to achieve good adhesion between, for example, an organic fiber cord and a coated rubber composition.
- the rubber latex containing unsaturated diene (A) is not limited, but specifically includes natural rubber (NR) latex, isoprene rubber (IR), and styrene-butadiene copolymer rubber (SBR), butadiene rubber (BR), ethylene-propylene-diene rubber (EPDM), chloroprene rubber (CR), halogenated butyl rubber, acrylonitrile-butadiene copolymer rubber (NBR), and vinylpyridine-styrene-butadiene copolymer Examples include latex of synthetic rubber such as rubber (Vp). These may be used alone or in combination of two or more.
- the rubber latex having unsaturated diene (A) is natural rubber (NR), isoprene rubber (IR), styrene-butadiene copolymer rubber (SBR), butadiene rubber (BR), ethylene-propylene-diene rubber (EPDM). , chloroprene rubber (CR), halogenated butyl rubber, acrylonilittle-butadiene copolymer rubber (NBR), and vinylpyridine-styrene-butadiene copolymer rubber (Vp), When the adhesive composition is used for organic fibers, the adhesiveness between the organic fibers and the coating rubber composition becomes better.
- NR natural rubber
- IR isoprene rubber
- SBR styrene-butadiene copolymer rubber
- BR butadiene rubber
- EPDM ethylene-propylene-diene rubber
- Vp vinylpyridine-styrene-butadiene copolymer rubber
- Vinylpyridine-styrene-butadiene copolymer rubber latex is preferred.
- Vinylpyridine-styrene-butadiene copolymer rubber latex is a rubber latex that has been widely used in adhesive compositions and articles such as tires, and in the adhesive composition of the present invention, it is used as an adhesive layer. It provides a good bond with the adhered rubber, and has the advantage of being relatively soft and flexible, and the adhesive layer is given strain relaxation due to rubber elasticity, resulting in high fracture resistance. This is because it also allows the organic fiber cord to be deformed.
- the content (solid content) of the rubber latex containing unsaturated diene (A) in the entire solid content of the adhesive composition of the present invention is not particularly limited, but is 25% by mass. % or more, more preferably 40% by mass or more, and still more preferably 50% by mass or more.
- the content of the rubber latex having the unsaturated diene (A) is preferably 95% by mass or less, more preferably 90% by mass or less, and even more preferably 85% by mass or less.
- the compatibility between the rubber polymers of the adhered rubber composition and the rubber latex contained in the adhesive composition is more appropriate.
- the adhesion state of the coating rubber on the organic fiber-rubber composite becomes more excellent.
- the content of the (A) rubber latex having an unsaturated diene is 95% by mass or less, the adhesion of the latex contained as another component in the adhesive composition is suppressed compared to the rubber glue.
- the amount of the coating component to be applied can be secured at a relatively certain level or more, and the mechanical stability of the adhesive liquid under shear strain can be obtained, and the adhesive composition can be coated on the fiber material to be adhered.
- the adhesive composition can suppress adhesion to the device as shown in FIG. Furthermore, the problem that the surface of the coated adhesive composition becomes rough and the adhesiveness with the coated rubber composition decreases is less likely to occur, so that the adhesiveness can be improved.
- the rubber latex having the unsaturated diene (A) can be prepared by, for example, dissolving an emulsifier such as potassium rosinate in water, adding a monomer mixture thereto, and further adding an electrolyte such as sodium phosphate and the like. Add peroxides as a polymerization initiator to perform polymerization, then, after reaching a predetermined conversion rate, add a charge transfer agent to stop the polymerization, and then remove the remaining monomer. can be obtained by. It is also preferable to use a chain transfer agent during polymerization.
- the emulsifier is used to emulsify a monomer mixture in an aqueous system, and includes alkali metal salts of fatty acids, alkali metal salts of rosin acid, sodium formaldehyde condensed naphthalene sulfonate, sulfuric acid esters of higher alcohols, and alkylbenzene sulfonates. , anionic surfactants such as aliphatic sulfonates, or nonionic surfactants such as polyethylene glycol alkyl ester types, alkyl ether types, and alkylphenyl ether types. .
- Rosin acid is a mixture of resin acids with similar chemical structures, mainly consisting of tricyclic diterpenes obtained from pine resin and the like. These resin acids have three ring structures, two double bonds, and one carboxyl group. It has highly reactive functional groups such as oxidation.
- the amount of such an emulsifier used is usually 0.1 to 8 parts by weight, preferably 1 to 5 parts by weight, based on 100 parts by weight of all monomers used in latex polymerization.
- a water-soluble initiator such as potassium persulfate, sodium persulfate, or ammonium persulfate, a redox initiator, or an oil-soluble initiator such as benzoyl peroxide can be used.
- potassium persulfate sodium persulfate, or ammonium persulfate
- a redox initiator a redox initiator
- an oil-soluble initiator such as benzoyl peroxide
- chain transfer agent examples include monofunctional alkyl mercaptans such as n-hexyl mercaptan, t-dodecyl mercaptan, n-dodecyl mercaptan, n-octyl mercaptan, n-tetradecyl mercaptan, and t-hexyl mercaptan; 1,10 - Bifunctional mercaptans such as decanedithiol and ethylene glycol dithioglycolate; trifunctional mercaptans such as 1,5,10-canditrithiol and trimethylolpropane tristhioglycolate; tetrafunctional mercaptans such as pentaerythritol tetrakisthioglycolate Mercaptans; disulfides; halogen compounds such as carbon tetrachloride, carbon tetrabromide, and ethylene bromide; ⁇ -methylst
- chain transfer agents can be used. These may be used alone or in combination of two or more.
- alkyl mercaptans are preferred, and n-octyl mercaptan and t-dodecyl mercaptan are more preferred.
- t-dodecyl mercaptan it is preferable to use t-dodecyl mercaptan.
- the amount of such a chain transfer agent used is usually 0.01 to 5 parts by weight, preferably 0.1 to 3 parts by weight, based on 100 parts by weight of all monomers used in latex polymerization.
- the latex may contain anti-aging agents such as hindered phenols, antifoaming agents such as silicone-based, higher alcohol-based, and mineral oil-based antifoaming agents, reaction terminators, and antifreeze.
- anti-aging agents such as hindered phenols
- antifoaming agents such as silicone-based, higher alcohol-based, and mineral oil-based antifoaming agents, reaction terminators, and antifreeze.
- General-purpose additives such as additives may also be used.
- the components (B) to (E) of the present invention can be added to the latex and included in advance, but in that case, they are included in the composition consisting of (A) to (E) in the adhesive composition of the present invention. That is to say.
- the vinyl pyridine-styrene-butadiene copolymer rubber latex is a ternary copolymer of a vinyl pyridine monomer, a styrene monomer, and a conjugated diene butadiene monomer, These monomers may further contain other copolymerizable monomers.
- the vinylpyridine monomer includes vinylpyridine and substituted vinylpyridine in which a hydrogen atom in the vinylpyridine is substituted with a substituent.
- vinylpyridine monomers include 2-vinylpyridine, 3-vinylpyridine, 4-vinylpyridine, 2-methyl-5-vinylpyridine, 5-ethyl-2-vinylpyridine, etc. Among these, 2-vinylpyridine is preferred.
- These vinylpyridine monomers may be used alone or in combination of two or more.
- the styrene monomer includes styrene and substituted styrene in which hydrogen atoms in the styrene are substituted with substituents.
- the styrene monomers include styrene, ⁇ -methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 2,4-diinopropylstyrene, 2,4-dimethylstyrene, 4-t -butylstyrene, hydroxymethylstyrene, etc., and among these, styrene is preferred. These styrene monomers may be used alone or in combination of two or more.
- conjugated diene-based butadiene monomer examples include aliphatic conjugated butadiene compounds such as 1,3-butadiene and 2-methyl-1,3-butadiene, and among these, 1,3-butadiene is preferred. These conjugated diene-based butadiene monomers may be used alone or in combination of two or more.
- Known methods can be used to synthesize the vinylpyridine-styrene-butadiene copolymer rubber latex, and specifically, for example, the method described in Japanese Patent Application Laid-Open No. 9-78045, which was investigated by the present inventors. method can be used. Using these methods, it is possible to have various compositions and intraparticle structures, such as copolymers with uniform or different composition ratios, within the same particle of vinylpyridine-styrene-butadiene copolymer rubber latex. can.
- vinylpyridine-styrene-butadiene copolymer rubber latex commercially available copolymers having a uniform monomer mixing ratio within the same particle include Nipol 2518 manufactured by Nippon Zeon Co., Ltd. and Nippon A&L. Examples include Piratex manufactured by Co., Ltd.
- V0658 manufactured by JSR Corporation may be mentioned as a commercial product of a copolymer having a monomer mixture ratio of different composition within the same particle. Any of these can be used as (A) the unsaturated diene-containing rubber latex of the adhesive composition of the present invention.
- the monomer ratio of vinylpyridine:styrene:butadiene is not particularly limited;
- the polymer preferably contains a copolymer obtained by polymerizing a monomer mixture consisting of 5 to 20% by weight of vinylpyridine, 10 to 40% by weight of styrene, and 45 to 75% by weight of butadiene.
- the amount of pyridine moieties that have a vulcanization-promoting effect in the rubber component will be appropriate, and if the degree of crosslinking by sulfur increases, the adhesive strength of the entire adhesive layer will further improve, and 20% by mass This is because if the degree of crosslinking of the rubber is below, the degree of crosslinking of the rubber will not become overvulcanized and a hard adhesive can be obtained.
- styrene is 10% by mass or more, the strength of the latex particles and the adhesive layer will be sufficient, and the adhesive force will be further improved, and if styrene is 40% by mass or less, the adhesive layer and the adhered rubber will be This is because it leads to ensuring adhesive strength while maintaining appropriate co-vulcanization properties.
- butadiene is 45% by mass or more, it becomes possible to form more sufficient crosslinking, and if it is 75% by mass or less, crosslinking is moderate and durability is ensured by changes in volume and modulus. This is because it can be done.
- the composition ratio of the monomer mixture of vinylpyridine:styrene:butadiene can be suitably set to, for example, 15:15:70.
- natural rubber latex can also be used in addition to the synthetic rubber latex having an unsaturated diene.
- the natural rubber latex is not particularly limited, and for example, field latex, ammonia-treated latex, centrifuged concentrated latex, deproteinized latex treated with surfactants or enzymes, and combinations thereof can be used. . Among these, it is preferable to use field latex.
- the adhesive composition of the present invention contains (B) a compound containing an amide group and an amino group in one molecule.
- the compound (B) containing an amide group and an amino group in one molecule has the effect of improving the storage stability (pot life) and mechanical stability of the adhesive composition.
- By coating the organic fiber cord with it also has the effect of improving the heat-resistant adhesive strength between the rubber and the organic fiber cord.
- the number of amide groups and amino groups in one molecule is not particularly limited, and may be one or more, each independently.
- the compound (B) containing an amide group and an amino group in one molecule preferably has a hydrophilic site in addition to the amide group and the amino group.
- Such hydrophilic sites include carboxyl groups, hydroxyl groups, and the like. Having these hydrophilic sites improves the stability (solubility/dispersibility) of (B) the compound containing an amide group and an amino group in one molecule in the aqueous solution of the adhesive composition.
- the compound (B) containing an amide group and an amino group in one molecule include polyamide amine.
- the polyamide amine can be produced by, for example, subjecting an amine compound such as an aliphatic amine, alicyclic amine, aromatic amine, araliphatic amine, or heterocyclic amine to a dehydration condensation reaction with a carboxylic acid such as dimer acid. can be manufactured. Further, when the polyamide amine is a polyamide polyamine having two or more amine groups, the stability (solubility/dispersibility) of the adhesive composition in an aqueous solution is improved.
- the amine value of the compound (B) containing an amide group and an amino group in one molecule is preferably 30 to 400.
- the compound (B) containing an amide group and an amino group in one molecule is (B-1) an amide condensate containing a polyamine and a polyvalent fatty acid, or (B-2) a polyamine and a polyvalent fatty acid.
- it is an epoxy adduct of an amide condensate containing.
- the compound (B) containing an amide group and an amino group in one molecule is (B-1) an amide condensate of a polyamine and a polyvalent fatty acid, or (B-2) an amide condensate of a polyamine and a polyvalent fatty acid.
- the compound (B) containing an amide group and an amino group in one molecule is preferably a compound obtained by condensing a dimer acid obtained from an unsaturated fatty acid with a polyamine.
- the compound (B) containing an amide group and an amino group in one molecule is a compound obtained by condensing a dimer acid obtained from an unsaturated fatty acid with a polyamine, when the adhesive composition is used for organic fibers, The adhesion between the fiber and the coating rubber composition becomes better.
- the compound (B) containing an amide group and an amino group in one molecule is preferably a compound obtained by condensing a dimer acid obtained from tall oil fatty acid with a polyamine.
- the compound (B) containing an amide group and an amino group in one molecule is a compound obtained by condensing a dimer acid obtained from tall oil fatty acid with a polyamine, when the adhesive composition is used on organic fibers, the organic The adhesion between the fiber and the coating rubber composition becomes even better.
- Examples of the aliphatic amines include alkylene polyamines, polyalkylene polyamines, alkylaminoalkylamines, and the like.
- Examples of the alkylene polyamine include methylene diamine, ethylene diamine, 1,2-diaminopropane, 1,3-diaminopropane, 1,4-diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, 1, Examples include 7-diaminoheptane, 1,8-diaminooctane, 1,9-diaminononane, 1,10-diaminodecane, and trimethylhexamethylenediamine.
- examples of the polyalkylene polyamine include diethylene triamine, dipropylene triamine, triethylenetetramine, tripropylenetetramine, tetraethylenepentamine, tetrapropylenepentamine, pentaethylenehexamine, nonaethylenedecamine, and bis(hexamethylene)triamine. etc.
- aliphatic amines include, for example, tetra(aminomethyl)methane, tetrakis(2-aminoethylaminomethyl)methane, 1,3-bis(2'-aminoethylamino)propane, 2,2'- Examples include [ethylenebis(iminotrimethyleneimino)]bis(ethaneamine), tris(2-aminoethyl)amine, bis(cyanoethyl)diethylenetriamine, and polyoxyalkylenepolyamine.
- the alicyclic amines include 1,3-bisaminomethylcyclohexane, 1,4-cyclohexanediamine, 4,4'-methylenebis(cyclohexaneamine), 4,4'-isopropylidenebis(cyclohexaneamine), and norbornanediamine. , isophorone diamine, and the like.
- the aromatic amines include phenylene diamine, naphthylene diamine, diaminodiphenylmethane, 2,2-bis(4-aminophenyl)propane, 4,4'-diaminodiphenyl ether, 4,4'-diaminobenzophenone, 4,4' -diaminodiphenylsulfone, 4,4'-diamino-3,3'-dimethyldiphenylmethane, 2,4'-diaminobiphenyl, 2,3'-dimethyl-4,4'-diaminobiphenyl, 3,3'-dimethoxy- Examples include 4,4'-diaminobiphenyl.
- aromatic aliphatic amine examples include o-xylylene diamine, m-xylylene diamine, p-xylylene diamine, bis(aminomethyl)naphthalene, bis(aminoethyl)naphthalene, and the like.
- the heterocyclic amines include N-methylpiperazine, morpholine, 1,4-bis-(3-aminopropyl)piperazine, 1,4-diazacycloheptane, 1-(2'-aminoethylpiperazine), 1 -[2'-(2''-aminoethylamino)ethyl]piperazine, 1,11-diazacycloeicosane, 1,15-diazacyclooctacosane, etc.
- the dimer acid is a dimer of unsaturated fatty acids, and usually contains a small amount of monomer or trimer.
- the unsaturated fatty acid is a carboxylic acid having preferably 12 to 24 carbon atoms, more preferably 16 to 18 carbon atoms, and having one or more unsaturated bonds in one molecule. preferable.
- Such unsaturated fatty acids include, for example, fatty acids having one unsaturated bond such as oleic acid, elaidic acid, and cetoleic acid; fatty acids having two unsaturated bonds such as sorbic acid and linoleic acid; linoleic acid, arachidonic acid, etc. Examples include fatty acids having three or more unsaturated bonds such as acids.
- fatty acids obtained from animals and plants can also be used, such as soybean oil fatty acids, tall oil fatty acids, linseed oil fatty acids, and the like.
- the weight average molecular weight (Mw) of the compound (B) containing an amide group and an amino group in one molecule is preferably 500 to 10,000, more preferably 900 to 2,500.
- the effect of improving the storage stability (pot life) and mechanical stability of the adhesive composition becomes greater, and by coating the organic fiber cord with the adhesive composition, the rubber and organic fiber cord The effect of improving the heat-resistant adhesive strength between the two is also increased.
- the weight average molecular weight is a value measured by gel permeation chromatography (GPC) in terms of polystyrene.
- (B) compound containing an amide group and an amino group in one molecule is (B-1) an amide condensate of a polyamine and a polyvalent fatty acid, a dimer acid obtained from an amine such as diethylene triamine and tall oil fatty acid. It is preferable to use Tomide 296 (amine value: 425, brown liquid) manufactured by T&K TOKA Co., Ltd., which is a polyamide amine condensed in a ratio of about 2:1.
- the epoxy compound to be added is a polyepoxy compound having two or more alicyclic epoxy groups in the molecule (alicyclic epoxy compounds) are preferred.
- alicyclic epoxy group refers to an epoxy group composed of two adjacent carbon atoms constituting an alicyclic ring (aliphatic ring) and an oxygen atom.
- polyfunctional epoxy resins such as bisphenol A type epoxy resin, bisphenol F type epoxy resin, epoxy novolak resin, alicyclic epoxy resin, polyfunctional epoxy resin, and brominated epoxy resin are exemplified.
- a hydrophobic liquid epoxy resin can preferably be used as the epoxy compound added in the above (B-2) epoxy adduct of an amide condensate containing a polyamine and a polyvalent fatty acid. It is not particularly limited as long as it reacts with and cures at room temperature.
- the hydrophobic liquid epoxy resin is hydrophobic and liquid.
- hydrophobic means not dissolving in water or not having hydrophilicity.
- the weight average molecular weight (Mw) of the epoxy-amine adduct is not particularly limited, but is preferably from 200 to 40,000, more preferably from 300 to 30,000, even more preferably from 400 to 20,000.
- the weight average molecular weight of the epoxy-amine adduct can be calculated using a standard polystyrene equivalent molecular weight measured by gel permeation chromatography (GPC).
- the epoxy compound to be added in the above (B-2) epoxy adduct of an amide condensate containing a polyamine and a polyvalent fatty acid is, for example, the T&K Tomide series manufactured by TOKA Corporation, which is currently on the market as a specific product name, or Preferred examples include Fuji Cure series, Mitsubishi Chemical's jER Cure, and Cytex's Beckopox EH series.
- the above (B-2) epoxy adduct of an amide condensate containing a polyamine and a polyvalent fatty acid is, for example, an adduct of a polyamide amine obtained by condensing dimer acid obtained from triethylenetetramine and tall oil fatty acid and bisphenol A diglycidyl ether. It is preferable to use the product name Tomide TXS-53-C (amine value: 195 to 215, yellowish brown liquid) manufactured by T&K TOKA Corporation.
- the content of the compound (B) containing an amide group and an amino group in one molecule in the adhesive composition is preferably in the range of 0.1 to 20% by mass, and 0.4 to 20% by mass in terms of solid content ratio. A range of 15% by mass is more preferred. When the content is within this range, the effect of the compound (B) containing an amide group and an amino group in one molecule becomes significant.
- the adhesive composition of the present invention includes (C) an aqueous compound having a (thermally dissociable blocked) isocyanate group.
- the adhesive composition of the present invention contains (C) an aqueous compound having a (thermally dissociable blocked) isocyanate group, thereby exhibiting excellent adhesive properties and mechanical stability even when formaldehyde and resorcinol are not included. You can realize your sexuality.
- the (thermally-dissociable blocked) isocyanate group of the aqueous compound having the (thermally-dissociable blocked) isocyanate group (C) means a thermally-dissociable blocked isocyanate group or an isocyanate group.
- the above-mentioned (heat-dissociable blocked) isocyanate group refers to (a) a heat-dissociable blocked isocyanate group produced by the reaction of an isocyanate group with a heat-dissociable blocking agent for the isocyanate group; An isocyanate group in which the isocyanate group has not reacted with the thermally dissociable blocking agent for the isocyanate group, (c) an isocyanate group generated by dissociation of the thermally dissociable blocking agent from the thermally dissociable blocked isocyanate group, and (d) Contains an isocyanate group.
- the aqueous nature of the (C) (thermally dissociable blocked) isocyanate group-containing aqueous compound means that it is water-soluble or water-dispersible.
- water-soluble does not necessarily mean complete water-solubility, but also means partial water-solubility or no phase separation in an aqueous solution of the adhesive composition.
- the (C) aqueous compound having a (thermally dissociable blocked) isocyanate group is an aqueous dispersion consisting of an addition product of (C-1) a polyisocyanate having an aromatic ring and a blocking agent having one or more active hydrogen groups.
- a (thermally dissociable blocked) isocyanate compound (hereinafter also simply referred to as "component (C-1)") is preferable.
- component (C-1) hereinafter also simply referred to as "component (C-1)
- the active hydrogen group includes hydrogen that becomes active hydrogen (atomic hydrogen (hydrogen radical) and hydride ion (hydride)) when placed under suitable conditions. It means base.
- the active hydrogen group include an amino group and a hydroxyl group.
- the thermally dissociable blocking agent is a blocking agent compound that protects the isocyanate group from any chemical reaction and, if necessary, dissociates the blocking agent by heat treatment to restore the isocyanate group. If so, it is not particularly limited. Specifically, in the process shown in Figure 1, the reactivity was suppressed by blocking with a thermally dissociable blocking agent at the temperature of the heat treatment for thermosetting after the adhesive treatment liquid was applied and dried.
- the thermal dissociation temperature is preferably such that the crosslinking reactivity of the isocyanate group can be recovered.
- the blocking agent examples include alcohol, phenol, active methylene, oxime, lactam, amine, etc., and are not particularly limited.
- lactams such as ⁇ -caprolactam, ⁇ -valerolactam, and ⁇ -butyrolactam
- phenol cresol, ethylphenol, butylphenol, octylphenol, nonylphenol, dinonylphenol, thiophenol, chlorophenol, amylphenol, and other phenols
- methanol, ethanol, Alcohols such as butanol, isopropyl alcohol, butyl alcohol, and cyclohexanol
- Malonic acid dialkyl esters such as dimethyl malonate and diethyl malonate
- active methylenes such as methyl aceto
- the component (C-1) specifically includes aromatic polyisocyanates or araliphatic polyisocyanates, and the aromatic isocyanates include phenylene diisocyanates such as m-phenylene diisocyanate and p-phenylene diisocyanate.
- Diisocyanates Diisocyanates; Tolylene diisocyanates such as 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate (TDI); 2,4'-diphenylmethane diisocyanate, 4,4'-diphenylmethane diisocyanate (MDI), dialkyldiphenylmethane diisocyanate , diphenylmethane diisocyanates such as tetraalkyldiphenylmethane diisocyanate; polymethylene polyphenyl polyisocyanate (polymeric MDI); m- or p-isocyanatophenylsulfonyl isocyanate; 4,4'-diisocyanatobiphenyl, 3,3'-dimethyl Diisocyanatobiphenyls such as -4,4'-diisocyanatobiphenyl; naphthalene diisocyanates such as 1,5-naphthylene
- aromatic aliphatic polyisocyanates examples include xylylene diisocyanates such as m-xylylene diisocyanate, p-xylylene diisocyanate (XDI), and tetramethylxylylene diisocyanate; diethylbenzene diisocyanate; and ⁇ , ⁇ , ⁇ , ⁇ -tetra Examples include methyl xylylene diisocyanate (TMXDI); and the like. Also included are modified products of the above polyisocyanates such as carbodiimides, polyols and allophanates.
- aromatic isocyanates are preferable from the viewpoint of cord convergence of the adhesive composition, and more preferably tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI) or Polymethylene polyphenyl polyisocyanate (polymeric MDI) is particularly preferred, and diphenylmethane diisocyanate (MDI) is particularly preferred.
- TDI tolylene diisocyanate
- MDI diphenylmethane diisocyanate
- MDI Polymethylene polyphenyl polyisocyanate
- MDI diphenylmethane diisocyanate
- a block of methylene diphenyl isocyanate especially a block of methylene diphenyl diisocyanate (also called “diphenylmethane diisocyanate”) as the component (C-1)
- a block of methylene diphenyl diisocyanate also called “diphenylmethane diisocyanate”
- the adhesion between the organic fiber and the coating rubber composition becomes even better.
- the aqueous compound having (C-2) (heat-dissociable blocked) isocyanate group is an aqueous urethane compound having (C-2) (thermally-dissociable blocked) isocyanate group (hereinafter simply referred to as "(C-2)"). (also referred to as “component”) is more preferable. Also in this case, when the adhesive composition is used for organic fibers, the adhesiveness between the organic fibers and the coating rubber composition becomes better. Details of the component (C-2) will be described later for convenience of explanation.
- the content (solid content) of the (C) aqueous compound having a (thermally dissociable blocked) isocyanate group in the total solid content of the adhesive composition is not particularly limited, but It is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 18% by mass or more. Further, the content of the aqueous compound having (thermally dissociable blocked) isocyanate group (C) is preferably 70% by mass or less, more preferably 60% by mass or less, and 45% by mass or less. It is even more preferable that there be.
- the content of the aqueous compound having the (thermally dissociable blocked) isocyanate group (C) is 5% by mass or more, the adhesiveness between the organic fiber and the coating rubber composition will be better. .
- the content of the aqueous compound having (C) (thermally dissociable blocked) isocyanate group is 70% by mass or less, the amount of other components such as rubber latex to be blended into the adhesive composition, This is because it becomes possible to ensure a certain level or more relative to each other, and as a result, the adhesion to the adhered rubber becomes better.
- the aqueous compound having (C) (thermally dissociable blocked) isocyanate group is used instead of the phenolic resin in which resorcinol and formaldehyde are co-condensed. It acts as an adhesion promoter with the following two functional effects (x) and (y).
- the (C) aqueous compound having a (thermally dissociable blocked) isocyanate group contributes to the characteristic of good adhesion between the organic fiber and the coating rubber composition.
- the principle of the two functional effects (x) and (y) of the aqueous compound having a (thermally dissociable blocked) isocyanate group as an adhesion promoter (C) An example will be described in detail below.
- Synthetic resin materials such as 6,6-nylon and polyethylene terephthalate, which are commonly used as organic fibers, are composed of flat linear polymer chains.
- the surface of the polymer chain or the gap between the polymer chains has a ⁇ -electronic atmosphere derived from the aromatic group contained in the polymer chain.
- adhesive compositions used with organic fibers made of polyester or the like have conventionally required that the adhesive composition be dispersed into the gaps between the polymer chains of the organic fibers;
- a planar structure having an aromatic ring having aromatic ⁇ electrons on the side surface is used.
- the adhesion promoter contains molecules from the parts that are easily bonded.
- a planar structure having an aromatic ring having aromatic ⁇ electrons on the side surface is used. It is preferable to add an adhesion promoter of molecules (parts that tend to diffuse into organic fibers) to promote adhesion.
- the particle size of the component (C-1) is preferably 0.01 to 0.50 ⁇ m.
- the particle size of the component (C-1) is 0.50 ⁇ m or less, the smaller the particle size, the more difficult it is for the component (C-1) to settle in the liquid, and the more uneven the dispersion in the adhesive layer. This is because it is difficult.
- water-based urethane compounds having (C-2) (thermally dissociable blocked) isocyanate groups have high water solubility, component precipitation in the adhesive composition liquid is difficult to occur, and it is possible to store them still.
- adhesion is stable over time, which is preferable.
- the thermally dissociable blocking agent of the component (C-2) protects the isocyanate groups from any chemical reaction, and if necessary, the blocking agent can be dissociated by heat treatment to restore the isocyanate groups.
- the blocking agent compound is not particularly limited as long as it is possible.
- the same compounds as those described above for the component (C-1) can be used, and preferably phenol, thiophenol, chlorophenol, cresol, resorcinol, p- Phenols such as sec-butylphenol, p-tert-butylphenol, p-sec-amylphenol, p-octylphenol, p-nonylphenol; Secondary or tertiary alcohols such as isopropyl alcohol and tert-butyl alcohol; diphenylamine, Aromatic secondary amines such as xylidine; phthalic acid imides; lactams such as ⁇ -valerolactam; caprolactams such as ⁇ -caprolactam; malonic acid dialkyl esters such as diethyl malonate and dimethyl malonate, acetylacetone, acetate Active methylene compounds such as acetic acid alkyl esters; Oximes such as acetyl,
- phenol, ⁇ -caprolactam, and ketoxime can be preferably used because they can easily thermally cure the adhesive composition stably by thermal dissociation by heating.
- the aqueous nature of the aqueous urethane compound means water-soluble or water-dispersible.
- water-soluble does not necessarily mean complete water-solubility, but also means partial water-solubility or no phase separation in an aqueous solution of the adhesive composition.
- the urethane compound of the aqueous urethane compound is a compound having a covalent bond formed between the nitrogen of the amine and the carbon of the carbonyl group, and means a compound represented by the following general formula (2).
- R and R' represent a hydrocarbon group.
- the molecular weight of the aqueous urethane compound having the (thermally dissociable blocked) isocyanate group (C-2) is not particularly limited as long as it maintains aqueous properties, and preferably has a number average molecular weight of 1,500 to 100, 000, particularly preferably a number average molecular weight of 9,000 or less.
- the method for synthesizing the component (C-2) is not particularly limited, and may be a known method such as the method described in JP-A-63-51474.
- a preferred embodiment of the component (C-2) is ( ⁇ ) an organic polyisocyanate compound having 3 or more and 5 or less functional groups and a number average molecular weight of 2,000 or less, ( ⁇ ) 2 or more and 4 or more.
- the composition ratio of (thermally dissociable blocked) isocyanate groups in the reaction product is 0.5% by mass or more and 11% by mass or less.
- the mixing ratio of ( ⁇ ), ( ⁇ ), ( ⁇ ) and ( ⁇ ) to the total amount is 40% by mass or more and 85% by mass or less for ( ⁇ ), and for ( ⁇ ), 5% by mass or more and 35% by mass or less, ( ⁇ ) is 5% by mass or more and 35% by mass or less, and ( ⁇ ) is 5% by mass or more and 35% by mass or less.
- Such component (C-2) has the advantage of increasing the self-water solubility of the urethane compound because it has both a part consisting of a (thermally dissociable blocked) isocyanate group and a hydrophilic part having a hydrophilic group. It is from.
- the above ( ⁇ ) organic polyisocyanate compound having 3 or more and 5 or less functional groups and having a number average molecular weight of 2,000 or less is not particularly limited, but may be an aromatic polyisocyanate compound or an oligomer thereof. is preferred, and other aliphatic, alicyclic, and heterocyclic polyisocyanate compounds and oligomers thereof may also be used.
- Component (C-2), which is a reaction product after reacting such ( ⁇ ) organic polyisocyanate compound having 3 or more and 5 or less functional groups and having a number average molecular weight of 2,000 or less, is an organic This is because it becomes easier to disperse into the gaps between the polymer chains of the fibers.
- aliphatic polyisocyanate compounds include ethylene diisocyanate, 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1,12-dodecane diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, 2 , 4,4-trimethylhexamethylene diisocyanate, dimer acid diisocyanate, lysine diisocyanate, etc.
- examples of the alicyclic polyisocyanate compound include cyclobutane-1,3-diisocyanate, cyclohexane-1,3-diisocyanate, cyclohexane-1, Examples include 4-diisocyanate, isophorone diisocyanate, 4,4'-methylenebis(cyclohexyl isocyanate), methylcyclohexane-2,4-diisocyanate, methylcyclohexane-2,6-diisocyanate
- heterocyclic polyisocyanate compound examples include tolylene diisocyanate adduct of 1,3,5-tris(2'-hydroxyethyl)isocyanuric acid, and examples of the aromatic polyisocyanate compound include m-phenylene diisocyanate, p-phenylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, m-xylylene diisocyanate, p-xylylene diisocyanate, 2,4'-diphenylmethane diisocyanate, 4,4'-diphenylmethane diisocyanate, m -Tetramethylxylylene diisocyanate, p-tetramethylxylylene diisocyanate, methine tris(4-phenyl isocyanate), tris(4-isocyanatophenyl)methane, tris(4-isocyanatophenyl ester)
- aromatic polyisocyanate compounds are preferred, and particularly preferred include methylene diphenyl polyisocyanate, polyphenylene polymethylene polyisocyanate, and the like.
- polyphenylene polymethylene polyisocyanate having a number average molecular weight of 2,000 or less is preferred, and polyphenylene polymethylene polyisocyanate having a number average molecular weight of 1,000 or less is particularly preferred.
- Component (C-2) which is a reaction product after reacting such an organic polyisocyanate compound ( ⁇ ) having 3 or more and 5 or more functional groups and having a number average molecular weight of 2,000 or less, is an organic This is because it becomes easier to disperse into the gaps between the polymer chains of the fibers.
- the above ( ⁇ ) compound having 2 or more and 4 or less active hydrogen groups and having a number average molecular weight of 5,000 or less is not particularly limited, but specifically, the following (i) to (vii) ) Compounds selected from the group consisting of: (i) polyhydric alcohols having a number average molecular weight of 5,000 or less and having 2 to 4 hydroxyl groups; (ii) polyvalent amines having a number average molecular weight of 5,000 or less and having 2 or more and 4 or less primary and/or secondary amino groups; (iii) amino alcohols having a number average molecular weight of 5,000 or less and having 2 or more and 4 or less primary and/or secondary amino groups and hydroxyl groups; (iv) polyester polyols having a number average molecular weight of 5,000 or less and having 2 to 4 hydroxyl groups; (v) polybutadiene polyols having a number average molecular weight of 5,000 or less and having 2 to 4 hydroxyl groups and copolymers of these and
- the active hydrogen group includes hydrogen that becomes active hydrogen (atomic hydrogen (hydrogen radical) and hydride ion (hydride)) when placed under suitable conditions. means base.
- the active hydrogen group include an amino group and a hydroxyl group.
- the compound having the above include, but are not particularly limited to, aminosulfonic acids such as taurine, N-methyltaurine, N-butyltaurine, and sulfanilic acid, and aminocarboxylic acids such as glycine and alanine.
- the method of synthesizing the component (C-2) by mixing and reacting the components ( ⁇ ), ( ⁇ ), ( ⁇ ), and ( ⁇ ) is not particularly limited, but is described in Japanese Patent Application Laid-Open No. A known method such as the method described in Japanese Patent No. 63-51474 can be used.
- Another preferred embodiment of the component (C-2) is ( ⁇ ) an organic polyisocyanate compound having a number average molecular weight of 2,000 or less and having 3 or more and 5 or less functional groups, ( ⁇ ) 2 or more functional groups, A compound having a number average molecular weight of 5,000 or less and having 4 or less active hydrogen groups, ( ⁇ ) a thermally dissociable blocking agent, ( ⁇ ) at least one active hydrogen group and an anionic, cationic or nonionic compound.
- a compound having one hydrophilic group and a compound containing ( ⁇ ) an active hydrogen group other than ( ⁇ ), ( ⁇ ), ( ⁇ ) and ( ⁇ ) in a predetermined mixing ratio is characterized in that the ratio is 0.5% by mass or more and 11% by mass or less.
- the respective mixing ratios for the total amount of ( ⁇ ), ( ⁇ ), ( ⁇ ), ( ⁇ ) and ( ⁇ ) are 40% by mass or more and less than 85% by mass for ( ⁇ ), and ( ⁇ ) for 5% by mass or more and 35% by mass or less, for ( ⁇ ) 5% by mass or more and 35% by mass or less, for ( ⁇ ) 5% by mass or more and 35% by mass or less, for ( ⁇ ) is more than 0% by mass and not more than 45% by mass.
- Such component (C-2) has the advantage of increasing the self-water solubility of the urethane compound because it has both a part consisting of a (thermally dissociable blocked) isocyanate group and a hydrophilic part having a hydrophilic group. It is from.
- an organic polyisocyanate compound having a number average molecular weight of 2,000 or less and having 3 or more and 5 or less functional groups, ( ⁇ ) a number average molecular weight having 2 or more and 4 or less active hydrogen groups; 5,000 or less, ( ⁇ ) a thermally dissociable blocking agent, and ( ⁇ ) a compound having at least one active hydrogen group and at least one anionic, cationic or nonionic hydrophilic group. , except for the mixing ratio, are as described in ⁇ Preferred embodiments of aqueous urethane compound having (C-2) (thermally dissociable blocked) isocyanate group>>.
- the method of synthesizing the component (C-2) by mixing and reacting the ( ⁇ ), ( ⁇ ), ( ⁇ ), ( ⁇ ) and ( ⁇ ) is not particularly limited, but , JP-A No. 63-51474, and other known methods may be used.
- Yet another preferred embodiment of the component (C-2) is represented by the following general formula (1): [In formula (1), A is a residue of an organic polyisocyanate compound from which an active hydrogen group has been removed; X is a residue from which an active hydrogen group has been removed from a polyol compound having 2 or more and 4 or less hydroxyl groups and having a number average molecular weight of 5,000 or less; Y is a residue of a thermally dissociable blocking agent from which the active hydrogen group has been removed; Z is a residue from which an active hydrogen group has been removed from a compound having at least one active hydrogen group and at least one salt-forming group or hydrophilic polyether chain; n is an integer between 2 and 4, p+m is an integer between 2 and 4 (m ⁇ 0.25) ].
- the adhesive composition when used for organic fibers, the adhesiveness between the organic fibers and the coating rubber composition becomes even better.
- the component (C-2) has the advantage of increasing the self-water solubility of the urethane compound because it has both a part consisting of a (thermally dissociable blocked) isocyanate group and a hydrophilic part having a hydrophilic group. be.
- the organic polyisocyanate compound which is the residue from which the active hydrogen group of the organic polyisocyanate compound is removed, which is A in the general formula (1), preferably contains an aromatic ring. This is because the component (C-2) is more easily dispersed in the gaps between the polymer chains of the organic fibers.
- polyphenylene polymethylene polyisocyanate examples include methylene diphenyl polyisocyanate, polyphenylene polymethylene polyisocyanate, and the like.
- Polyphenylenepolymethylene polyisocyanates having a number average molecular weight of 6,000 or less are preferred, and polyphenylenepolymethylene polyisocyanates having a number average molecular weight of 4,000 or less are particularly preferred.
- the polyol compound having a number average molecular weight of 5,000 or less and having hydroxyl groups or less is not particularly limited, but specifically, compounds selected from the group consisting of the following (i) to (vi), etc. can be mentioned.
- polyhydric alcohols having 2 to 4 hydroxyl groups and having a number average molecular weight of 5,000 or less;
- amino alcohols having a number average molecular weight of 5,000 or less, having 2 or more and 4 or less primary and/or secondary amino groups and hydroxyl groups;
- polyester polyols having 2 to 4 hydroxyl groups and having a number average molecular weight of 5,000 or less;
- polychloroprene polyols having 2 to 4 hydroxyl groups and a number average molecular weight of 5,000 or less, and copolymers of these and other vinyl monomers;
- polyether polyols having 2 to 4 hydroxyl groups and a number average molecular weight of 5,000 or less; C2 to C4 alkylene oxide polyadducts of polyhydr
- the component (C-2) is not particularly limited, but commercially available products such as Elastron BN27, BN77, BN11, F-2955-D manufactured by Daiichi Kogyo Seiyaku Co., Ltd. can also be used. Among them, Elastron BN77 is preferred.
- One embodiment of the adhesive composition of the present invention comprises (A) a rubber latex having an unsaturated diene, (B) a compound containing an amide group and an amino group in one molecule, and (C) (a thermally dissociable block). D) an aqueous compound having an isocyanate group; and (D) an aqueous component having a plurality of phenolic hydroxy groups in the molecule.
- the aqueous component (D) having a plurality of phenolic hydroxy groups in its molecule is preferably a plant-derived aqueous component having a plurality of phenolic hydroxy groups in its molecule.
- the adhesive composition when used for organic fibers, the adhesiveness between the organic fibers and the coating rubber composition becomes better.
- the plant-derived aqueous component having a plurality of phenolic hydroxy groups in the molecule is preferably a plant-derived polymer having a plurality of phenolic hydroxy groups in the molecule, and preferably includes water-soluble polyphenols.
- Specific examples include polyphenols such as lignin, tannin, tannic acid, flavonoids, and derivatives thereof.
- the adhesive composition is used on organic fibers, the adhesiveness between the organic fibers and the coating rubber composition becomes even better.
- the aqueous component (D) having a plurality of phenolic hydroxy groups in its molecule has the effect of a phenolic antioxidant and is useful in adhesive compositions.
- a phenolic antioxidant By suppressing the oxidative deterioration reaction at the saturated diene site of the rubber latex containing the unsaturated diene (A), the amount of unsaturated diene on the surface of the adhesive composition can be reduced over time due to radical oxidation reactions caused by heat and light. can be prevented. Therefore, when (D) an aqueous component having a plurality of phenolic hydroxyl groups in the molecule is used in an adhesive composition, there is little deterioration of the adhesion between the organic fiber and the coated rubber composition over time, and the adhesion is good. Become.
- the aqueous component (D) having a plurality of phenolic hydroxy groups in the molecule is preferably lignin or a derivative thereof.
- Lignin along with polysaccharides such as cellulose, is a major component of plant cell walls. Lignin contains functional groups such as hydroxyl groups, methoxy groups, carbonyl groups, and carboxyl groups, but phenolic hydroxy groups are particularly reactive and therefore do not interact with cationic substances. You can have it.
- Lignin is a polymer with a structure based on phenylpropane, but the molecular structure of lignin varies and is a huge biopolymer that forms a three-dimensional network structure, so its molecular structure is still not completely understood. Not explained.
- lignin forms a strong composite material with polysaccharides such as cellulose in plant cell walls, it is extremely difficult to isolate natural lignin without modifying its chemical structure.
- Various industrial separation methods are used to extract lignin from materials such as wood. Examples of the lignin obtained after separation include sulfonic acid lignin, kraft lignin, soda lignin, and steam blasted lignin.
- lignins obtained on a large scale from the pulp waste liquid of chemical pulping in the paper pulp manufacturing process that is, lignosulfonates, or krafts. Lignin is a well-known material.
- lignins examples include lignin modified by hydroxymethylation, epoxidation, denitrification, acylation, or hydroxylation, diethanolamine-modified lignin, enzyme-modified lignin, laccase-modified lignin, urea-modified lignin, and lignosulfonate. , Arcel method lignin, alkali granite method lignin, polyethylene glycol-added lignin, and the like.
- the above-mentioned kraft lignin is produced by heating wood chips of hardwood, coniferous trees, miscellaneous trees, bamboo, kenaf, bagasse, etc., as raw materials, into a digester together with a cooking solution of sodium hydroxide/sodium sulfide, etc.
- This is lignin derived from a chemical pulping method (high-temperature, high-pressure reaction) called kraft cooking, which is a high-pressure reaction. It is obtained by adding acid and/or carbon dioxide to the kraft waste liquid obtained after kraft cooking to precipitate the dissolved lignin modified product, and then dehydrating and washing the generated precipitate.
- the precipitate after dehydration and washing can be purified by adding organic solvents such as alcohol or acetone to dissolve it, separating insoluble impurities and drying, and modifying to introduce various functional groups as necessary. It can be performed.
- the kraft lignin can be obtained and used as a commercially available product. Among them, Sigma-Aldrich Co.
- the reagent name "Lignin, alkali, kraft” (CAS Number: 8068-05-1) manufactured by LLC is preferred.
- the sulfonic acid lignin is a lignin obtained from waste liquid etc. eluted from sulfite pulp in a chemical pulping method using a sulfite cooking method in which wood chips are reacted at high temperature and high pressure with a cooking solution using sulfite and/or sulfite.
- Sulfonic acids and salts thereof, and particularly preferred examples include calcium lignosulfonate, sodium lignosulfonate, potassium lignosulfonate, and magnesium lignosulfonate. Among these, sodium ligninsulfonate and the like are preferred.
- These sulfonic acid lignins are available as commercial products. For example, as the lignin sulfonate or modified lignin sulfonate, the Sunextract series manufactured by Nippon Paper Industries Co., Ltd., etc. can be used.
- High value-added products of lignin sulfonate include, of course, high-purity products, as well as lignin sulfonate heated in an alkaline aqueous solution using sodium hydroxide or ammonia in the presence of an oxidizing agent such as oxygen.
- an oxidizing agent such as oxygen.
- Partially de(low) sulfonated lignin sulfonate whose degree of sulfonation is reduced by a method for example, see JP-A No. 2016-135834
- the highly purified lignin sulfonate or modified lignin sulfonate the Pearlex series manufactured by Nippon Paper Industries Co., Ltd.
- the aqueous component (D) having a plurality of phenolic hydroxy groups in its molecule is preferably a ligninsulfonic acid derivative.
- the aqueous component (D) having multiple phenolic hydroxy groups in the molecule is a lignin sulfonic acid derivative
- the adhesive composition when used on organic fibers, adhesion between the organic fibers and the coated rubber composition may be reduced.
- the properties are particularly good.
- derivatives of ligninsulfonic acid include ligninsulfonate, modified ligninsulfonate, partially desulfonated ligninsulfonic acid, partially desulfonated ligninsulfonate, and the like. Ru.
- the ligninsulfonic acid is partially desulfonated ligninsulfonic acid, it is preferably used because it has good dispersibility on the surface of the organic fiber when fixing the adhered organic fiber (see JP-A No. 2002-146028). I can do it.
- the tannins are present in a wide range of plants, such as woody trees, but also in fruits, leaves and seeds, such as grapes, persimmons, berries, cloves, legumes, medicinal herbs, tea leaves and cocoa beans. It is a group of polyphenols. Tannin molecules generally contain a large number of hydroxyl and often also carboxyl groups and tend to form strong complexes and complexes with a wide range of macromolecules.
- the tannins include tannic acid, proanthocyanidins, flavonoids, gallic acid esters, catechins, etc., and also include derivatives thereof such as salts and modified products thereof.
- flavonoids are ubiquitous in the leaves, stems, and barks of plants, and are substances generally called tannins, which consist of hydrolyzed tannins and condensed tannins.
- the identification of these tannins is that when boiled in dilute hydrochloric acid, condensed tannins form an insoluble precipitate, while tannins belonging to the hydrolyzable type hydrolyze to produce water-soluble substances.
- the tannins are water-soluble and can be obtained by extraction from plant materials such as wood, bark, leaves, fruits, pods, and insects using a method such as hot water extraction.
- Hydrolyzed tannins are obtained, for example, from the wood of chestnuts, nuts, bark of oaks, tea leaves, quince and gallic beetles, and condensed tannins are obtained from the wood of quebracho, the bark of mimosa, persimmons and buckwheat seeds. etc.
- Particularly preferable condensed tannins include "Mimosa" (solid powder) manufactured by Kawamura Tsusho Co., Ltd., which is obtained from the bark of mimosa.
- the content (solid content) of the aqueous component (D) having a plurality of phenolic hydroxy groups in the molecule, based on the total solid content in the adhesive composition, is not particularly limited, but It is preferably 1% by mass or more, more preferably 3% by mass or more, and even more preferably 5% by mass or more. Further, the content of the aqueous component (D) having a plurality of phenolic hydroxy groups in the molecule is preferably 60% by mass or less, more preferably 30% by mass or less, and 20% by mass or less. It is even more preferable that there be.
- the adhesiveness between the organic fiber and the coating rubber composition will be better.
- the content of the aqueous component (D) having multiple phenolic hydroxy groups in the molecule is 60% by mass or less, the amount of other components such as rubber latex to be blended into the adhesive composition may be adjusted relative to This is because it becomes possible to maintain a certain level or more of the adhesive, and as a result, the adhesion to the adhered rubber becomes better.
- One embodiment of the adhesive composition of the present invention comprises (A) a rubber latex having an unsaturated diene, (B) a compound containing an amide group and an amino group in one molecule, and (C) (thermally dissociable block). (d) an aqueous compound having an isocyanate group; and (E) a polyvalent metal salt.
- the polyvalent metal salt (E) is not particularly limited, but any salt of a divalent or higher metal ion can be used.
- the polyvalent metal salt is a salt of a metal ion having a valence of two or more, the adhesive strength of the adhesive composition to the organic fiber can be increased.
- the polyvalent metal salt (E) is a water-soluble metal salt, particularly preferably a metal salt that forms a 4-coordinated or 6-coordinated polyvalent metal ion.
- the polyvalent metal salt is water-soluble and forms a 4-coordinated or 6-coordinated polyvalent metal ion, the adhesive strength of the adhesive composition to the organic fibers is further increased. can be made into something.
- the polyvalent metal salts may be used alone or in combination of two or more.
- the polyvalent metal salt (E) is not particularly limited, but is preferably a metal salt that can form polyvalent metal ions (including complex ions) and dissolve in water as a solvent. If the metal ion is multivalent rather than monovalent, it can interact with multiple components, such as the fiber surface of the adherend, sites where it can interact with the components of the adhesive composition, and vulcanization. This is because ionic crosslinking or coordination crosslinking becomes possible with sulfur active species that sometimes migrate from the adhered rubber, and is expected to have the effect of increasing the fixing force or cohesive force with the components. Particularly preferred polyvalent metal ions are 4-coordinated or 6-coordinated polyvalent metal ions.
- metal salts examples include mordants used as dyeing chemicals for textiles, but preferred examples include metal salts of aluminum, iron, chromium, copper, tin, nickel, titanium, etc. Among these, metal salts containing iron and/or copper are more preferred, and metal salts containing copper are particularly preferred.
- the polyvalent metal salt is a metal salt containing one or more metals selected from the group consisting of iron and copper, it is possible to increase the adhesive strength of the adhesive composition to the organic fibers. can. Moreover, when the polyvalent metal salt (E) is a metal salt containing copper, the adhesive strength of the adhesive composition to organic fibers can be made particularly high.
- metal salts include, but are not limited to, iron chloride, tin chloride, alum, copper sulfate, copper acetate, copper oxalate, copper gluconate, aluminum acetate, or polyvalent metal ions thereof. Natural mordants such as iron serum and lye can be mentioned. Among these, it is particularly preferable to include metal salts of copper ions. In a preferred embodiment of the present invention, copper gluconate, which is used as a food additive for copper supplementation, is used.
- the polyvalent metal salt (E) can be dissolved in water with stirring and added to the adhesive composition as an aqueous solution of about 0.01 to 5% by mass. Within this range, like a mordant in dyeing organic fibers, the effect of fixing on the surface of organic fibers can be enhanced, and the adhesive strength to organic fibers can be made higher.
- the content (solid content) of the polyvalent metal salt (E) in the entire solid content of the adhesive composition of the present invention is not particularly limited, but is 0.01% by mass or more.
- the content is preferably 0.05% by mass or more, and more preferably 0.05% by mass or more.
- the content of the polyvalent metal salt (E) is preferably 3% by mass or less, more preferably 1.5% by mass or less. (E) If the content of the polyvalent metal salt is 0.05% by mass or more, the adhesiveness between the organic fiber and the coating rubber composition will be better.
- the content of (E) the polyvalent metal salt is 3% by mass or less, thickening due to the aggregation effect of the adhesive composition due to the polyvalent metal salt can be suppressed, and the amount of alkaline ions The adhesion decrease due to overvulcanization under heat is suppressed without becoming excessive, and it is also favorable from an environmental point of view.
- the adhesive composition of the present invention comprises (A) a rubber latex having an unsaturated diene, (B) a compound containing an amide group and an amino group in one molecule, and (C) a (thermally dissociable blocked) isocyanate group. and preferably further contains one or more components selected from the group consisting of (D) to (E) below. (D) an aqueous component having multiple phenolic hydroxy groups in the molecule; (E) Polyvalent metal salt
- these (A) rubber latex having an unsaturated diene, (B) a compound containing an amide group and an amino group in one molecule, and (C) (thermally dissociable blocked compound) are used.
- the aqueous compound having an isocyanate group, (D) the aqueous component having a plurality of phenolic hydroxy groups in the molecule, and (E) the polyvalent metal salt can be mixed in any order.
- the components to be included in the adhesive composition are (E) a polyvalent metal salt, (D) an aqueous component having a plurality of phenolic hydroxy groups in the molecule, (B) a compound containing an amide group and an amino group in one molecule, (A) a rubber latex having an unsaturated diene, and (C) an aqueous compound having a (thermally dissociable blocked) isocyanate group.
- (E) polyvalent metal salt when mixed with components (B) to (D), forms a polyion complex, which acts as an anionic group on the surface of the organic fiber of the adherend and as an emulsifier on the surface of rubber latex. This is because the anionic group of the anionic group makes it easier to fix.
- the mixing mass ratio of (A) a rubber latex having an unsaturated diene and (B) a compound aqueous component containing an amide group and an amino group in one molecule [(A):(B)] (solid content equivalent) is not particularly limited, but is preferably in the range of 100:0.1 to 100:40, more preferably in the range of 100:0.3 to 100:20. . If the mixing mass ratio is 100:0.1 or more (if the ratio value is 0.001 or more), (A) rubber latex having an unsaturated diene is used as a core, and (B) is used as a core.
- a known water-soluble material that can strengthen the film made of the aqueous component (B) is used in combination with a common coacervate.
- electrolyte substances consisting of gum arabic, carrageenan, CMCs, organic salts, or inorganic salts other than the above-mentioned (E) polyvalent metal salts, such as monovalent salts such as sodium chloride, potassium chloride, and ammonium chloride. Salts with cations such as sulfates, phosphates, carbonates, acetates can be used.
- water-soluble liquids in which the film-forming material is less soluble than in water such as alcohols such as ethanol and propanol, or isobutylene-maleic anhydride ring-opening compounds;
- Water-soluble polymers such as polymer salts can also be used.
- the mixing mass ratio of (A) a rubber latex having an unsaturated diene and (C) an aqueous compound having a (thermally dissociable blocked) isocyanate group [(A):(C)] is not particularly limited, but is preferably in the range of 100:5 to 100:90, more preferably in the range of 100:10 to 100:70, and more preferably in the range of 100:20 to 100:20. Even more preferred is a range of 100:60. If the mixing mass ratio is 100:5 or more (the ratio value is 0.05 or more), the aqueous compound having (C) (thermally dissociable blocked) isocyanate group in the adhesive composition.
- the effect as a crosslinking agent can be easily obtained, and the crosslinking agent can sufficiently maintain the fracture resistance of the adhesive layer, and can prevent a decrease in adhesiveness under strain.
- the mixing mass ratio is 100:90 or less (the ratio value is 0.9 or less)
- the curing of the adhesive composition due to excessive crosslinking is small, and the strain input during tire running is less likely to occur.
- This is advantageous because the causticity of the adhesive composition layer can be maintained and deterioration of the strength of the organic fiber adhesive layer or organic fiber cord coated with the adhesive composition under strain can be suppressed.
- the components included in the adhesive composition may also include (F) a water-soluble epoxide compound.
- the amount of the (F) epoxide compound is not particularly limited, but the mixing mass ratio of the (F) epoxide compound to the mass of all components of the adhesive composition of the present invention [(F): Adhesive composition
- the total solid mass of the product is preferably in the range of 0.1:100 to 10:100.
- water-soluble epoxide compound (F) examples include diethylene glycol diglycidyl ether, polyethylene diglycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, and 1,6-hexanediol.
- Polyvalents such as diglycidyl ether, glycerol polyglycidyl ether, trimethylolpropane polyglycidyl ether, polyglycerol polyglycidyl ether, pentaerythrithiol polyglycidyl ether, diglycerol polyglycidyl ether, sorbitol polyglycidyl ether, etc.
- Examples include reaction products of alcohols and epichlorohydrin. When these compounds are used as the epoxy compound, the adhesion between the organic fiber cord and the rubber can be further improved.
- the components (A) to (E) of the adhesive composition of the present invention are preferably aqueous. This is because water, which causes less environmental pollution, can be used as a solvent.
- Organic fiber material By coating the adhesive composition configured as above on the surface of organic fibers such as nylon resin, polyester resin, aromatic polyamide resin, or acrylic resin, and subjecting it to appropriate heat treatment, An adhesive layer made of an adhesive composition can be coated on the surface of an organic fiber (resin base material) to produce an organic fiber material that has been subjected to an adhesive treatment.
- organic fibers such as nylon resin, polyester resin, aromatic polyamide resin, or acrylic resin
- the organic fiber material of the present invention is characterized in that it comprises organic fibers and an adhesive layer covering the surface of the organic fibers, and the adhesive layer is made of the adhesive composition described above.
- the material of the organic fiber is a nylon resin, a polyester resin, an aromatic polyamide resin, or an acrylic resin, and it is particularly preferable that the material of the organic fiber is a nylon resin or a polyester resin. used nylon resin.
- adhesiveness is further improved.
- Methods for coating the surface of the organic fibers with the adhesive composition include methods of dipping the organic fibers (particularly organic fiber cords) in the adhesive composition, methods of applying the adhesive composition with a brush, etc. There are methods such as spraying the agent composition, and an appropriate method can be selected as necessary.
- the method for coating the surface of organic fibers with the adhesive composition is not particularly limited, but when coating the surface of organic fibers with the adhesive composition, the adhesive composition is dissolved in various solvents to reduce the viscosity. A lower value is preferable because it facilitates coating (dipping, coating, spraying, etc.). Furthermore, it is environmentally preferable that the solvent for reducing the viscosity of the adhesive composition mainly consists of water.
- the solution concentration of the adhesive composition impregnated into the organic fiber is not particularly limited, but is 5.0% by mass or more in terms of solid content, based on the mass of the organic fiber. It is preferably 0% by mass or less, and more preferably 7.5% by mass or more and 20.0% by mass or less.
- the thickness of the adhesive layer formed from the adhesive composition is not particularly limited, but is preferably 50 ⁇ m or less, more preferably 0.5 ⁇ m or more and 30 ⁇ m or less.
- the adhesive durability under rolling of the tire tends to decrease.
- the adhesive composition at the interface of the fiber material to which it is attached undergoes relatively little deformation due to the stress caused by strain due to the high rigidity of the fiber material, but as it moves away from the interface, the deformation due to strain increases. This is to become.
- the adhesive composition contains a larger amount of thermosetting condensate than the adhered rubber material, it is harder and more brittle and tends to suffer from adhesive fatigue under repeated strain.
- the average thickness of the adhesive composition layer is preferably 50 ⁇ m or less, more preferably 0.5 ⁇ m or more and 30 ⁇ m or less.
- the organic fiber is an organic fiber cord formed by twisting a plurality of filaments.
- the organic fiber is an organic fiber cord made by twisting a plurality of filaments together, it is suitable for reinforcing rubber articles such as tires and conveyor belts.
- the adhesive layer has a dry mass of 0.5 to 6.0% by mass of the organic fiber cord. is preferred. By setting the dry mass of the adhesive layer within this range, appropriate adhesiveness can be ensured. Note that the organic fiber cord will be detailed below.
- the organic fiber coated with the adhesive composition can be dried, heat treated, etc. in the same manner as the organic fiber material described above.
- the organic fiber material whose surface is coated with the adhesive composition is dried at a temperature of, for example, 100° C. to 210° C., and then subsequently subjected to heat treatment.
- This heat treatment is preferably performed at a temperature not lower than the glass transition temperature of the polymer of the organic fiber (resin base material), preferably not lower than [melting temperature -70°C] and not higher than [melting temperature -10°C] of the polymer.
- the reason for this is that below the glass transition temperature of the polymer, the molecular mobility of the polymer is poor and the components of the adhesive composition that promote adhesion cannot interact sufficiently with the polymer. This is because the bonding strength between the material and the organic fibers cannot be obtained.
- Such organic fibers may be pretreated by electron beam, microwave, corona discharge, plasma treatment, or the like.
- the adhesive composition of the present invention described above can be suitably used for reinforcing various rubber articles.
- the rubber article of the present invention is characterized in that it is reinforced with the above organic fiber material. This makes it possible to provide a rubber article with excellent durability while ensuring environmental friendliness and workability.
- Such rubber articles of the present invention include, in addition to tires, conveyor belts, belts, hoses, air springs, and the like.
- the organic fiber-rubber composite of the present invention is a composite of organic fiber and rubber, and is characterized in that the organic fiber is coated with the above adhesive composition. As a result, good adhesion can be obtained without using resorcinol, and an organic fiber-rubber composite (particularly an organic fiber cord-rubber composite) with good environmental friendliness and workability can be obtained.
- the adhesive composition of the present invention is particularly excellent in adhesion between organic fibers such as organic fiber cords and the coating rubber composition.
- FIG. 2 is a schematic cross-sectional view showing an organic fiber cord-rubber composite as an example of the organic fiber-rubber composite of the present invention.
- the outer surface of the organic fiber cord 1 in the radial direction is coated with an adhesive layer 32 made of the adhesive composition 2 of the present invention.
- the organic fiber cord 1 is further bonded to the covering rubber composition 33 located outside in the radial direction via the adhesive 32 of the adhesive composition 2, and the organic fiber-rubber composite 31 of the present invention is formed.
- the reinforcing material for rubber articles using the adhesive composition of the present invention can also be in the form of staple fibers, nonwoven fabrics, etc.
- Organic fiber cord which is an example of the organic fiber, is used to supplement the strength of rubber articles such as tires.
- the organic fiber cord is used as a reinforcing material.
- the spun organic fiber raw threads are twisted to form an organic fiber cord.
- the organic fiber cord is embedded in rubber covering the organic fiber cord using an adhesive composition, and is vulcanized and bonded to produce an organic fiber-rubber composite. Rubber composites can be used as reinforcing members for rubber articles such as tires.
- the material of the organic fibers is not particularly limited, but includes polyester fibers, nylon resin fibers such as 6-nylon, 6,6-nylon, and 4,6-nylon (aliphatic polyamide fibers), and proteins such as artificial fibroin fibers.
- polyester fibers such as fibers, polyketone fibers, aromatic polyamide fibers such as polynonamethylene terephthalamide and paraphenylene terephthalamide, acrylic fibers, carbon fibers, cellulose fibers such as rayon and lyocell.
- polyester, 6-nylon, and 6,6-nylon are preferred, and 6,6-nylon is particularly preferred.
- the material of the polyamide fiber is a polymer having an amide bond in the main chain, and more specifically, 80% or more of the bonding mode of the repeating units in the main chain is in the amide bond mode.
- the above polyamide include, but are not limited to, dicarboxylic acids such as adipic acid, sebacic acid, terephthalic acid, hexaethylenediamine, nonanediamine, methylpentadiamine, p-phenylenediamine, m-phenylenediamine. Examples include those obtained by condensing diamines such as the following by an amide bonding reaction.
- the most typical aliphatic polyamide is 6,6-nylon.
- the organic fiber cord is preferably an organic fiber cord formed by twisting a plurality of single fiber filaments, particularly for the purpose of reinforcing rubber articles such as tires and conveyor belts. Further, the organic fiber cord is preferably an organic fiber cord formed by twisting together a ply-twisted single fiber filament and a first-twisted single-fiber filament. Preferably (that is, the organic fiber cord is preferably a cord formed by twisting a plurality of filaments together, and the cord formed by twisting the plurality of filaments has upper twist and lower twist). In this case, the fiber thickness of the organic fiber cord is preferably in the range of 100 dtex or more and 5000 dtex or less.
- the number of first twists is preferably 10 to 50 times/10cm. Further, in the tire of the present invention, the number of ply twists is preferably 10 to 50 times/10 cm.
- the organic fiber cord is formed by first twisting and first twisting, the fiber thickness of the twisted cord is 100 dtex to 5000 dtex, and the number of twists is 10 to 50 times/10 cm, When the number of twists is 10 to 50 times/10 cm, it is more suitable for reinforcing rubber articles such as tires and conveyor belts.
- the organic fiber is a 66 nylon tire cord having a twist structure of 1400 dtex/2, a top twist number of 39 times/10 cm, and a final twist number of 39 times/10 cm, and the adhesive composition is applied to the tire cord.
- the adhesive composition is applied to the tire cord.
- it is an organic fiber-rubber composite.
- the coating rubber composition constituting the organic fiber-rubber composite of the present invention is preferably one in which a rubber component is blended with various compounding agents commonly used in the rubber industry.
- the rubber component is not particularly limited; for example, in addition to natural rubber, polyisoprene rubber (IR), polybutadiene rubber (BR), styrene-butadiene copolymer rubber (SBR), acrylonitrile-butadiene rubber (NBR) ), conjugated diene-based synthetic rubbers such as chloroprene rubber (CR) and butyl rubber (IIR), as well as ethylene-propylene copolymer rubber (EPM), ethylene-propylene-diene copolymer rubber (EPDM), and polysiloxane rubber. etc.
- natural rubber and conjugated diene synthetic rubber are preferred. Further, these rubber components may be used alone or in combination of two or more.
- the organic fiber-rubber composite of the present invention is obtained by coating an organic fiber such as an organic fiber cord with the adhesive composition of the present invention to form an adhesive layer, and (A) unsaturated in the adhesive composition. It is produced by co-vulcanizing and adhering a rubber latex containing a diene and a rubber component in a coating rubber composition to which the organic fiber is adhered.
- the organic fibers coated with the adhesive composition combine the rubber latex (A) having an unsaturated diene in the adhesive composition and the rubber in the coated rubber composition that is the adherend of the organic fibers.
- the components are co-vulcanized and bonded together.
- sulfur for co-vulcanization of the rubber components in the coating rubber composition
- a tyralium polysulfide compound such as tetramethyltylarium disulfide, dipentamethylenetylarium tetrasulfide, 4,4-dithiomorpholine
- p- Organic vulcanizing agents such as quinone dioxime, p,p'-dibenzoquinone dioxime, and cyclic sulfur imide
- the rubber component in the coating rubber composition may contain various compounding agents such as fillers such as carbon black, silica, and aluminum hydroxide, vulcanization accelerators, anti-aging agents, and softeners that are commonly used in the rubber industry. , can be appropriately blended.
- the vulcanizing agent contained in the adherend of synthetic organic fiber materials such as organic fibers and/or the adherend of the coated rubber composition migrates to the adhesive composition, It goes without saying that the adhesion effect can also be obtained in an adhesion method in which the adhesive composition is crosslinked by the migrated vulcanizing agent.
- the tire of the present invention uses the above-mentioned organic fiber-rubber composite. As a result, good adhesion can be obtained without using resorcinol, and a tire with good environmental friendliness and productivity can be obtained.
- the organic fiber-rubber composite can be used, for example, as a carcass, a belt, a belt reinforcing layer, a reinforcing layer around a belt such as a flipper.
- the tire of the present invention may be obtained by molding an unvulcanized rubber composition and then vulcanizing it, or by using a semi-vulcanized rubber that has undergone a pre-vulcanization process etc. After molding, it may be obtained by further main vulcanization.
- an organic fiber cord etc. treated with the above-mentioned adhesive composition is used in any part of the tire, but other members are not particularly limited, and known members may be used. can be used.
- the tire of the present invention is preferably a pneumatic tire, and the gas to be filled into this pneumatic tire may include ordinary air or air with adjusted oxygen partial pressure, as well as nitrogen, argon, helium, etc. Inert gases can be used.
- the adhesive composition, organic fiber material, and organic fiber-rubber composite of the present invention described above can be applied not only to the tires but also to all kinds of rubber articles such as conveyor belts, belts, hoses, and air springs. Can be done.
- the compound component (B-1) consisting of polyamide amine which is a condensation of diethylenetetramine and dimer acid obtained from tall oil fatty acid
- the product name "Tomide 296” liquid
- the compound component (B-2) consisting of an adduct of polyamide amine and bisphenol A diglycidyl ether, which is a condensation of ethylene tetramine and dimer acid obtained from tall oil fatty acid, is the product name "Tomide TXS-53" manufactured by T&K TOKA Corporation.
- -C solid content concentration 40% by mass
- deionized water while stirring to produce an aqueous solution with a solid content concentration of 5% by mass, and this aqueous solution was used to prepare an adhesive composition. used.
- (D) Aqueous component having multiple phenolic hydroxy groups in the molecule>
- (D) a water-based component having multiple phenolic hydroxy groups in the molecule, a water-soluble polyphenol, and (D-1) a reduced degree of sulfonation.
- D-2) Kraft lignin manufactured by Sigma-Aldrich Co.
- (E) Polyvalent metal salt In Examples 10 to 13 below, as the (E) polyvalent metal salt, (E-1) a polyvalent metal salt of copper, trade name “copper (II) gluconate” manufactured by Tokyo Chemical Industry Co., Ltd. , (E-2) A polyvalent metal salt of iron, trade name “Iron (II) chloride tetrahydrate” manufactured by Nacalai Tesque Co., Ltd., was stirred into deionized water to give a solid content concentration of 0.5 mass. %, and the aqueous solution was used for preparing an adhesive composition.
- (E-1) a polyvalent metal salt of copper, trade name "copper (II) gluconate” manufactured by Tokyo Chemical Industry Co., Ltd.
- Aqueous component having hydroxyl group (Examples 7 to 9, 11 to 12), (B) Compound containing amide group and amino group in one molecule (Examples 1 to 13), (A) Rubber having unsaturated diene
- the latex (Examples 1 to 13) and the aqueous compound having (C) (thermally dissociable blocked) isocyanate group (Examples 1 to 13) are blended in this order, and the solid content of the adhesive composition is After mixing to a concentration of 17% by mass, they were sufficiently stirred to obtain adhesive compositions (Examples 1 to 13) that are embodiments of the present invention.
- ⁇ Coating of tire cord with each adhesive composition As the organic fiber cord, a tire cord made of 66 nylon with a twist structure of 1400 dtex/2, a top twist count of 39 turns/10 cm, and a bottom twist count of 39 turns/10 cm was used.
- the tire cord was dipped in each of the adhesive compositions of Comparative Examples 1 to 5 and Examples 1 to 13, and the concentration of the adhesive composition impregnated into the tire cord was 3% relative to the mass of the organic fiber cord. .3% by mass.
- drying in a drying zone (135°C, 80 seconds) heat curing of the resin while applying tension (33 N/piece) in a hot zone (235°C, 60 seconds), and heating while relaxing the tension in a normalizing zone.
- Tire cords coated with each of the adhesive compositions of Comparative Examples 1 to 5 and Examples 1 to 13 were obtained by sequentially curing (235° C., 60 seconds).
- each adhesive composition was subjected to shear strain for 10 minutes at a compressive load of 10 kg and a rotational speed of 1000 r/min using the rotor of the Maron mechanical stability tester, and then The coagulation rate (%) was evaluated using the following formula and rounded off to three decimal places. A smaller value indicates better mechanical stability.
- Coagulation rate (%) [(dry mass of generated coagulum)/(solid mass of sample adhesive liquid)] x 100
- (A-1) Rubber latex with unsaturated diene, vinylpyridine-styrene-butadiene copolymer latex synthesized by the above method, solid content concentration 41% by mass
- C-1 (thermally dissociable blocked) aqueous compound having isocyanate group, manufactured by Meisei Chemical Industry Co., Ltd., trade name "DM-6400" (blocking agent thermal dissociation temperature: approximately 130°C, solid content concentration 40 mass %), methyl ethyl ketoxime block-diphenylmethane diisocyanate compound, aqueous dispersion (C-2): (thermally dissociable blocked) aqueous compound having isocyanate group, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., trade name "Elastron BN77 (F- 2955D-1) (blocking agent thermal dissociation temperature: approximately 160°C, pH 8.0, solid content concentration 31% by mass), aqueous dispersion
- D-1 Polyphenol (lignin sulfonate), manufactured by Tokyo Chemical Industry Co., Ltd., trade name "Lignin (alkali)” (CAS Number: 8061-51-6), partially desulfonated with reduced degree of sulfonation lignin sulfonate, solid powder (D-2): polyphenol (kraft lignin), Sigma-Aldrich Co. Manufactured by LLC, product name "Lignin, alkali” (CAS Number: 8068-05-1), kraft lignin, solid powder (D-3): polyphenol (condensed tannin), product name "Lignin, alkali”, manufactured by Kawamura Tsusho Co., Ltd. "Mimosa”, solid powder
- E-1 Polyvalent metal salt (copper compound), manufactured by Tokyo Kasei Kogyo Co., Ltd., trade name “Copper (II) gluconate” (CAS Number: 527-09-3, purity 97% or more), solid powder Body (E-2): Polyvalent metal salt (iron compound), manufactured by Nacalai Tesque Co., Ltd., trade name "Iron (II) chloride tetrahydrate” (CAS Number: 13478-10-9, purity 98% or more) , solid powder
- an adhesive composition that can ensure desired adhesiveness without using resorcin and does not impair workability during use, as well as organic fiber materials and rubber articles using the same.
- Organic fiber-rubber composites and tires can be provided. Therefore, the present invention can be used in the industrial field of manufacturing rubber articles such as tires.
- Organic fiber cord 2 Adhesive composition 3: Dipping bath (dipping bath) 4: Organic fiber cord coated with adhesive composition 5: Squeezing roll 6: Drying zone 7: Hot zone 8: Normalizing zone 31: Organic fiber-rubber composite 32: Adhesive layer made of adhesive composition 33: Coated rubber composition
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Abstract
Description
即ち、本発明の接着剤組成物、有機繊維材料、ゴム物品、有機繊維-ゴム複合体及びタイヤの要旨構成は、以下の通りである。
(B)一分子中にアミド基及びアミノ基を含む化合物と、
(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物と、
を含むことを特徴とする、接着剤組成物。
(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分、
(E)多価金属塩
からなる群から選択される1種以上の成分を含む、[1]に記載の接着剤組成物。
(α)3個以上、5個以下の官能基を有する、数平均分子量が2,000以下の有機ポリイソシアネート化合物、
(β)2個以上、4個以下の活性水素基を有する、数平均分子量が5,000以下の化合物、
(γ)熱解離性ブロック剤、及び、
(δ)少なくとも1つの活性水素基と、アニオン性、カチオン性または非イオン性である少なくとも1つの親水基と、を有する化合物、
を、(α)、(β)、(γ)及び(δ)の総和量に対するそれぞれの混合比率が、
(α)については、40質量%以上、85質量%以下、
(β)については、5質量%以上、35質量%以下、
(γ)については、5質量%以上、35質量%以下、及び、
(δ)については、5質量%以上、35質量%以下、
になるように混合して、反応させた後の反応生成物であって、且つ、
イソシアネート基(-NCO)の分子量を42としたときの、前記反応生成物中における、(熱解離性ブロックド)イソシアネート基の構成比率が、0.5質量%以上、11質量%以下である、[9]に記載の接着剤組成物。
Aは、有機ポリイソシアネート化合物の、活性水素基が脱離した残基、
Xは、2個以上、4個以下の水酸基を有する、数平均分子量が5,000以下のポリオール化合物の、活性水素基が脱離した残基、
Yは、熱解離性ブロック剤の、活性水素基が脱離した残基、
Zは、少なくとも1つの活性水素基と、少なくとも1つの塩を生成する基又は親水性ポリエーテル鎖と、を有する化合物の、活性水素基が脱離した残基、
nは、2以上4以下の整数、
p+mは、2以上4以下の整数(m≧0.25)
を表す]で表される、[9]又は[10]に記載の接着剤組成物。
前記接着剤層が、[1]~[21]のいずれか一つに記載の接着剤組成物からなることを特徴とする、有機繊維材料。
本発明の接着剤組成物は、(A)不飽和ジエンを有するゴムラテックスと、(B)一分子中にアミド基及びアミノ基を含む化合物と、(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物と、を含むことを特徴とする。
更に、本発明の接着剤組成物は、(B)一分子中にアミド基及びアミノ基を含む化合物が(A)不飽和ジエンを有するゴムラテックスの分散状態を安定化するため、放置安定性も良好である。
従って、本発明の接着剤組成物によれば、レゾルシンを用いることなく所望の接着性を得ることができると共に、使用時における作業性についても良好に確保することが可能となる。
また、本発明の接着剤組成物は、更に、ホルムアルデヒドを含まないことが好ましい。この場合、環境負荷を更に低減することができる。
本発明の接着剤組成物において、(A)不飽和ジエンを有するゴムラテックスとしては、不飽和ジエンを有する合成ゴムラテックスと、天然ゴムラテックスとが挙げられる。
これらの乳化剤のうちでも、ロジン酸の金属塩、特には、ロジン酸のアルカリ金属塩を含むことが好ましく、これは単独、即ち、1種類のみで用いることもでき、他の乳化剤と2種以上で組み合わせて併用することもできる。
ロジン酸は、松脂等から得られる3環性ジテルペン類を主成分として、よく似た化学構造の樹脂酸の混合物である。これら樹脂酸は、3つの環構造、2つの二重結合、1つのカルボキシル基を持っており、二重結合部分は、不飽和カルボン酸あるいはレゾール型フェノール樹脂のメチロール末端と、カルボキシル基部分でエステル化するなどの反応性に富んだ官能基を持っている。
このような乳化剤の使用量は、ラテックス重合に用いられる全単量体の100質量部に対し、通常、0.1~8質量部であり、好ましくは1~5質量部である。
これらの連鎖移動剤のうち、好ましくはアルキルメルカプタンが挙げられ、より好ましくはn-オクチルメルカプタン、t-ドデシルメルカプタンが挙げられる。これらの中でも、t-ドデシルメルカプタンを用いることが好ましい。
このような連鎖移動剤の使用量は、ラテックス重合に用いられる全単量体の100質量部に対し、通常0.01~5質量部であり、好ましくは0.1~3質量部である。
なおラテックスに本発明の(B)~(E)の成分を添加して予め含ませることができるが、その場合は本発明の接着剤組成物で(A)~(E)からなる組成に含むこと、とする。
前記ビニルピリジン-スチレン-ブタジエン共重合体ゴムラテックスは、ビニルピリジン系単量体と、スチレン系単量体と、共役ジエン系ブタジエン単量体と、を三元共重合させたものであるが、これら単量体に共重合可能な他の単量体を更に含ませてもよい。
本発明の接着剤組成物は、(B)一分子中にアミド基及びアミノ基を含む化合物を含む。該(B)一分子中にアミド基及びアミノ基を含む化合物は、接着剤組成物の放置安定性(ポットライフ)及び機械的安定性を向上させる作用を有し、また、該接着剤組成物を有機繊維コードにコーティングすることで、ゴムと有機繊維コードとの間の耐熱接着力を向上させる作用も有する。
なお、一分子中の、アミド基及びアミノ基の数は、特に限定されず、それぞれ独立して、1つでもよいし、複数でもよい。
また、前記(B)一分子中にアミド基及びアミノ基を含む化合物は、不飽和脂肪酸から得られるダイマー酸とポリアミンを縮合した化合物であることが好ましい。前記(B)一分子中にアミド基及びアミノ基を含む化合物が、不飽和脂肪酸から得られるダイマー酸とポリアミンを縮合した化合物である場合、接着剤組成物を有機繊維に用いた際に、有機繊維と被覆ゴム組成物の接着性が、より良好となる。
また、前記(B)一分子中にアミド基及びアミノ基を含む化合物は、トール油脂肪酸から得られるダイマー酸とポリアミンを縮合した化合物であることが好ましい。前記(B)一分子中にアミド基及びアミノ基を含む化合物が、トール油脂肪酸から得られるダイマー酸とポリアミンを縮合した化合物である場合、接着剤組成物を有機繊維に用いた際に、有機繊維と被覆ゴム組成物の接着性がより一層良好となる。
前記アルキレンポリアミンとしては、例えば、メチレンジアミン、エチレンジアミン、1,2-ジアミノプロパン、1,3-ジアミノプロパン、1,4-ジアミノブタン、1,5-ジアミノペンタン、1,6-ジアミノヘキサン、1,7-ジアミノヘプタン、1,8-ジアミノオクタン、1,9-ジアミノノナン、1,10-ジアミノデカン、トリメチルヘキサメチレンジアミン等が挙げられる。
また、前記ポリアルキレンポリアミンとしては、例えば、ジエチレントリアミン、ジプロピレントリアミン、トリエチレンテトラミン、トリプロピレンテトラミン、テトラエチレンペンタミン、テトラプロピレンペンタミン、ペンタエチレンヘキサミン、ノナエチレンデカミン、ビス(ヘキサメチレン)トリアミン等が挙げられる。
なお、本発明においては、疎水性液状エポキシ樹脂は、疎水性であり、かつ液状のものである。ここで、疎水性とは、水に対して溶解しない又は親水性を有さないことを意味する。
本発明の接着剤組成物は、(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物を含む。本発明の接着剤組成物は、(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物を含むことで、ホルムアルデヒド及びレゾルシンを含まない場合であっても、優れた接着性及び機械的安定性を実現できる。
具体的には、前記(熱解離性ブロックド)イソシアネート基とは、(イ)イソシアネート基が当該イソシアネート基に対する熱解離性ブロック剤と反応して生じた熱解離性ブロックドイソシアネート基、(ロ)イソシアネート基が当該イソシアネート基に対する熱解離性ブロック剤と未反応であるイソシアネート基、(ハ)熱解離性ブロックドイソシアネート基から熱解離性ブロック剤が解離して生じたイソシアネート基、及び、(ニ)イソシアネート基、を含む。
これらのブロック剤のうちでも、加熱での熱解離による接着剤組成物の熱硬化が安定して得られ易いフェノール、ε-カプロラクタム及びケトオキシムを好適に用いることができる。
これらの芳香環を分子内に含むポリイソシアネートのうち、接着剤組成物のコード集束性の観点から、芳香族イソシアネート類が好ましく、より好ましくは、トリレンジイソシアネート(TDI)、ジフェニルメタンジイソシアネート(MDI)或いはポリメチレンポリフェニルポリイソシアネート(ポリメリックMDI)であり、特に好ましくは、ジフェニルメタンジイソシアネート(MDI)類である。(C-1)成分として、メチレンジフェニルイソシアネート類のブロック体、中でも、メチレンジフェニルジイソシアネート(「ジフェニルメタンジイソシアネート」とも呼ばれる。)のブロック体を用いることで、接着剤組成物を有機繊維に用いた際に、有機繊維と被覆ゴム組成物の接着性が、より一層良好となる。
(y)接着剤組成物による接着剤層内で、前記(熱解離性ブロックド)イソシアネート基を有する化合物によるイソシアネート基による架橋で3次元ネットワーク構造が形成され、前記接着剤層を補強する機能効果。
有機繊維として汎用される6,6-ナイロン、ポリエチレンテレフタレート等の合成樹脂素材は、扁平線状の高分子鎖からなる。そして、該高分子鎖の表面または該高分子鎖の間隙は、該高分子鎖に含まれる芳香族等に由来するπ電子的雰囲気を有している。
そこで、従来より、ポリエステル等からなる有機繊維で使用される接着剤組成物は、十分な接着力を得るために、前記接着剤組成物が有機繊維の高分子鎖の間隙へ分散すること、及び、前記接着剤組成物による接着剤層が前記有機繊維の高分子鎖の表面に密着することを目的として、芳香族性π電子を有する芳香環を側面に有する平面的な構造(有機繊維に拡散しやすい部分)の分子を接着促進剤として含有してきた。
本発明においては、芳香族類であるレゾルシンを含まない接着剤組成物では、6,6-ナイロンの接着剤組成物においても、芳香族性π電子を有する芳香環を側面に有する平面的な構造(有機繊維に拡散しやすい部分)の分子の接着促進剤を添加して、接着を促進することが好ましい。
前記(C)成分を含む接着剤層では、前述のとおり、前記(B)一分子中にアミド基及びアミノ基を含む化合物のアミド基及びアミノ基と(また、接着剤組成物が、後述する(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分を含む場合は、(B)一分子中にアミド基及びアミノ基を含む化合物のアミド基及びアミノ基と、(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分のフェノール性ヒドロキシ基と)、熱処理でブロック剤が解離したイソシアネートとのイソシアネート架橋による共有結合を形成することで、接着剤組成物による接着を強化することができる。
一方、(C-2)(熱解離性ブロックド)イソシアネート基を有する水性ウレタン化合物であると、水溶性が高いため、接着剤組成物液中の成分沈降が発生し難く、静置保存を行っても成分の不均一等が少ないため、経時等での接着が安定し好ましい。
前記(C-2)成分の熱解離性ブロック剤は、イソシアネート基を任意の化学反応から保護しつつ、必要に応じて熱処理をすることによりブロック剤を解離させて、イソシアネート基を復元することが可能であるようなブロック剤化合物であれば、特に限定されるものではない。前記熱解離性ブロック剤の具体例としては、前記(C-1)成分について前述したブロック剤と同じ化合物を用いることができ、好ましくは、フェノール、チオフェノール、クロルフェノール、クレゾール、レゾルシノール、p-sec-ブチルフェノール、p-tert-ブチルフェノール、p-sec-アミルフェノール、p-オクチルフェノール、p-ノニルフェノール等のフェノール類;イソプロピルアルコール、tert-ブチルアルコール等の第2級又は第3級のアルコール;ジフェニルアミン、キシリジン等の芳香族第2級アミン類;フタル酸イミド類;δ-バレロラクタム等のラクタム類;ε-カプロラクタム等のカプロラクタム類;ジエチルマロネート、ジメチルマロネートなどのマロン酸ジアルキルエステル、アセチルアセトン、アセト酢酸アルキルエステル等の活性メチレン化合物;アセトキシム、メチルエチルケトキシム、シクロヘキサノンオキシム等のオキシム類;3-ヒドロキシピリジン、1,2-ピラゾール、3,5-ジメチルピラゾール、1,2,4-トリアゾール、ジイソプロピルアミン、N,N’-ジフェニルホルムアミジン等の塩基性窒素化合物および酸性亜硫酸ソーダ等が挙げられる。
前記(C-2)成分の好ましい実施態様は、(α)3個以上、5個以下の官能基を有する数平均分子量が2,000以下の有機ポリイソシアネート化合物、(β)2個以上、4個以下の活性水素基を有する数平均分子量が5,000以下の化合物、(γ)熱解離性ブロック剤、及び、(δ)少なくとも1つの活性水素基と、アニオン性、カチオン性または非イオン性である少なくとも1つの親水基と、を有する化合物を、所定の混合比率になるように混合して、反応させた後の反応生成物であって、且つ、イソシアネート基(-NCO)の分子量を42としたときの、前記反応生成物中における(熱解離性ブロックド)イソシアネート基の構成比率が、0.5質量%以上、11質量%以下であることを特徴とする。ここで、(α)、(β)、(γ)及び(δ)の総和量に対するそれぞれの混合比率は、(α)については、40質量%以上、85質量%以下、(β)については、5質量%以上、35質量%以下、(γ)については、5質量%以上、35質量%以下、また、(δ)については、5質量%以上、35質量%以下である。この場合、接着剤組成物を有機繊維に用いた際に、有機繊維と被覆ゴム組成物の接着性が、より一層良好となる。このような(C-2)成分は、(熱解離性ブロックド)イソシアネート基からなる部位と、親水性基を有する親水性の部位を併せ持つために、ウレタン化合物の自己水溶性が高まる利点を有するからである。
(i)2個以上4個以下の水酸基を有する数平均分子量5,000以下の多価アルコール類、
(ii)2個以上4個以下の第一級および/または第二級アミノ基を有する数平均分子量5,000以下の多価アミン類、
(iii)2個以上4個以下の第一級および/または第二級アミノ基と水酸基を有する数平均分子量5,000以下のアミノアルコール類、
(iv)2個以上4個以下の水酸基を有する数平均分子量5,000以下のポリエステルポリオール類、
(v)2個以上4個以下の水酸基を有する数平均分子量5,000以下のポリブタジエンポリオール類およびそれらと他のビニルモノマーとの共重合体、
(vi)2個以上4個以下の水酸基を有する数平均分子量5,000以下のポリクロロプレンポリオール類およびそれらと他のビニルモノマーとの共重合体、
(vii)2個以上4個以下の水酸基を有する数平均分子量5,000以下のポリエーテルポリオール類である、
多価アミン、多価フェノールおよびアミノアルコール類のC2~C4のアルキレンオキサイド重付加物、C3以上の多価アルコール類のC2~C4のアルキレンオキサイド重付加物、C2~C4のアルキレンオキサイド共重合物、または、C3~C4のアルキレンオキサイド重合物。
前記(C-2)成分の別の好ましい実施態様は、(α)3個以上、5個以下の官能基を有する数平均分子量2,000以下の有機ポリイソシアネート化合物、(β)2個以上、4個以下の活性水素基を有する数平均分子量5,000以下の化合物、(γ)熱解離性ブロック剤、(δ)少なくとも1つの活性水素基と、アニオン性、カチオン性または非イオン性の少なくとも1つの親水基と、を有する化合物、及び、(ε)活性水素基を含む、(α)、(β)、(γ)及び(δ)以外の化合物とを、所定の混合比率となるように混合して、反応させた後の反応生成物であって、且つ、イソシアネート基(-NCO)の分子量を42としたときの、前記反応生成物中における(熱解離性ブロックド)イソシアネート基の構成比率が、0.5質量%以上、11質量%以下であることを特徴とする。ここで、(α)、(β)、(γ)、(δ)及び(ε)の総和量に対するそれぞれの混合比率は、(α)については、40質量%以上、85質量%未満、(β)については、5質量%以上、35質量%以下、(γ)については、5質量%以上、35質量%以下、(δ)については、5質量%以上、35質量%以下、(ε)については、0質量%より多く、45質量%以下である。このような(C-2)成分は、(熱解離性ブロックド)イソシアネート基からなる部位と、親水性基を有する親水性の部位を併せ持つために、ウレタン化合物の自己水溶性が高まる利点を有するからである。
前記(C-2)成分のさらに別の好ましい実施態様は、下記一般式(1):
Aは、有機ポリイソシアネート化合物の、活性水素基が脱離した残基、
Xは、2個以上、4個以下の水酸基を有する、数平均分子量が5,000以下のポリオール化合物の、活性水素基が脱離した残基、
Yは、熱解離性ブロック剤の、活性水素基が脱離した残基、
Zは、少なくとも1個の活性水素基と、少なくとも1個の塩を生成する基又は親水性ポリエーテル鎖とを、有する化合物の、活性水素基が脱離した残基、
nは、2以上4以下の整数、
p+mは、2以上4以下の整数(m≧0.25)
を表す]で表されることを特徴とする。この場合も、接着剤組成物を有機繊維に用いた際に、有機繊維と被覆ゴム組成物の接着性が、より一層良好となる。前記(C-2)成分は、(熱解離性ブロックド)イソシアネート基からなる部位と、親水性基を有する親水性の部位を併せ持つために、ウレタン化合物の自己水溶性が高まる利点を有するからである。
(i)2個以上4個以下の水酸基を有する、数平均分子量5,000以下の多価アルコール類、
(ii)2個以上4個以下の第一級および/または第二級アミノ基と水酸基を有する、数平均分子量5,000以下のアミノアルコール類、
(iii)2個以上4個以下の水酸基を有する、数平均分子量5,000以下のポリエステルポリオール類、
(iv)2個以上4個以下の水酸基を有する、数平均分子量5,000以下の、ポリブタジエンポリオール類およびそれらと他のビニルモノマーとの共重合体、
(v)2個以上4個以下の水酸基を有する、数平均分子量5,000以下の、ポリクロロプレンポリオール類およびそれらと他のビニルモノマーとの共重合体、
(vi)2個以上4個以下の水酸基を有する、数平均分子量5,000以下のポリエーテルポリオール類である、
多価アミン、多価フェノール及びアミノアルコール類のC2~C4のアルキレンオキサイド重付加物、C3以上の多価アルコール類のC2~C4のアルキレンオキサイド重付加物、C2~C4のアルキレンオキサイド共重合物、または、C3~C4のアルキレンオキサイド重合物。
本発明の接着剤組成物の一実施態様は、(A)不飽和ジエンを有するゴムラテックスと、(B)一分子中にアミド基及びアミノ基を含む化合物と、(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物と、(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分と、を含む。
本発明の接着剤組成物の一実施態様は、(A)不飽和ジエンを有するゴムラテックスと、(B)一分子中にアミド基及びアミノ基を含む化合物と、(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物と、(E)多価金属塩と、を含む。該(E)多価金属塩としては、特に限定されるものではないが、2価以上の金属イオンの塩であれば使用できる。(E)多価金属塩が2価以上の金属イオンの塩であれば、接着剤組成物の有機繊維への接着力をより高いものにすることができる。
好ましくは(E)多価金属塩は、水溶性である金属塩であり、特に好ましくは、4配位又は6配位の多価金属イオンとなる金属塩である。(E)多価金属塩が、水溶性であり、且つ4配位又は6配位の多価金属イオンとなる金属塩であれば、接着剤組成物の有機繊維への接着力をより一層高いものにすることができる。
(E)多価金属塩は、1種単独で使用しても、2種以上を組み合わせて使用してもよい。
特に好ましい多価金属イオンは、4配位又は6配位の多価金属イオンである。これらの金属塩としては、繊維の染色薬品として使用される媒染剤等を挙げることができるが、例えば、アルミニウム、鉄、クロム、銅、スズ、ニッケル、チタン等の金属塩が好ましく挙げられ、これらの中でも、鉄及び/又は銅を含む金属塩が更に好ましく、銅を含む金属塩が特に好ましい。(E)多価金属塩が、鉄、銅からなる群から選択される一種以上の金属を含む金属塩であれば、接着剤組成物の有機繊維への接着力をより高いものにすることができる。また、(E)多価金属塩が、銅を含む金属塩であれば、接着剤組成物の有機繊維への接着力を特に高いものにすることができる。
具体的な金属塩としては、特に限定されるものではないが、塩化鉄、塩化スズ、ミョウバン、硫酸銅、酢酸銅、シュウ酸銅、グルコン酸銅、酢酸アルミニウム、又はこれら多価金属イオンを含む鉄漿や灰汁等の天然媒染剤を挙げることができる。これらのうち、銅イオンの金属塩を含むことが特に好ましい。本発明の好適実施態様においては、銅分補給の食品添加物等で用いられているグルコン酸銅を用いる。
本発明の接着剤組成物は、(A)不飽和ジエンを有するゴムラテックスと、(B)一分子中にアミド基及びアミノ基を含む化合物と、(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物と、を含むことを特徴とし、好適には、更に、下記(D)~(E)からなる群から選択される1種以上の成分を含む。
(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分、
(E)多価金属塩
この理由は、(E)多価金属塩は、(B)~(D)成分と混合すると、ポリイオンコンプレックスとすることで、被着体の有機繊維表面のアニオン性基や、ゴムラテックス表面の乳化剤のアニオン性基により定着し易い状態になるためである。
前記混合質量比が、100:0.1以上であれば(比の値として0.001以上であれば)、(A)不飽和ジエンを有するゴムラテックスをコアとして、その周囲に(B)の水性成分によるラテックス粒子を保護する皮膜を形成することができ、且つ、十分な強度の接着剤層を得ることもできるからである。また、前記混合質量比が、100:40以下であれば(比の値として0.4以下であれば)、(A)不飽和ジエンを有するゴムラテックスをコアとして、その周囲に形成される(B)の水性成分のマトリックスの保護層の皮膜が厚くなり過ぎず、有機繊維の被着体である被覆ゴム組成物と接着剤組成物とを共加硫して接着させる際に、被着体である被覆ゴム組成物と(A)不飽和ジエンを有するゴムラテックスとが良好に相溶し、その結果、被着体である被覆ゴム組成物と接着剤組成物との間の接着の初期過程が好適に進行するからである。
前記混合質量比が、100:5以上であれば(比の値として0.05以上であれば)、接着剤組成物中における(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物の架橋剤としての効果が得られ易く、架橋剤により接着剤層の耐破壊抗力を十分に保つことができ、歪下での接着性の低下を防止することができるからである。また、前記混合質量比が100:90以下であれば(比の値として0.9以下であれば)、過剰な架橋に伴った接着剤組成物の硬化が少なく、タイヤ走行時の歪入力で、接着剤組成物層の苛動性を保つことができ、歪下での接着剤組成物被覆の有機繊維の接着層、或いは有機繊維コードの強度の劣化を抑制できるため良好である。
以上のように構成された接着剤組成物を、有機繊維、例えば、ナイロン樹脂、ポリエステル樹脂、芳香族ポリアミド樹脂又はアクリル樹脂等からなる有機繊維の表面に被覆させ、適度な熱処理を施すことにより、接着剤組成物からなる接着剤層が有機繊維(樹脂基材)の表面に被覆され、接着処理が施された有機繊維材料を作製することができる。
特に好ましくは、前記有機繊維の材質が、ナイロン樹脂、ポリエステル樹脂、芳香族ポリアミド樹脂又はアクリル樹脂であり、中でも、有機繊維の材質がナイロン樹脂、ポリエステル樹脂であることが好ましく、後述する実施例においてはナイロン樹脂を使用した。前記有機繊維がナイロン樹脂からなる場合、接着性が更に向上する。
上述した本発明の接着剤組成物は、各種ゴム物品の補強用途に好適に用いることができる。本発明のゴム物品は、上記の有機繊維材料により補強されていることを特徴とするものである。これにより、環境性や作業性を確保しつつ、耐久性に優れたゴム物品とすることができる。このような本発明のゴム物品としては、タイヤの他、コンベヤベルト、ベルト、ホース、空気バネ等を挙げることができる。
本発明の有機繊維-ゴム複合体は、有機繊維とゴムとの複合体であって、該有機繊維が、上記の接着剤組成物により被覆されていることを特徴とするものである。これにより、レゾルシンを用いることなく良好な接着性を得ることができ、環境性や作業性が良好な有機繊維-ゴム複合体(特には、有機繊維コード-ゴム複合体)とすることができる。本発明の接着剤組成物は、特に、有機繊維コード等の有機繊維と被覆ゴム組成物の接着性に優れている。
図2は、本発明の有機繊維-ゴム複合体の一例の有機繊維コード-ゴム複合体を示す断面概略図である。図2に示す有機繊維-ゴム複合体31は、有機繊維コード1の外径方向外側表面が、本発明の接着剤組成物2による接着剤層32で被覆されている。そして、前記有機繊維コード1は、前記接着剤組成物2による接着剤32を介して、更にその外径方向外側にある被覆ゴム組成物33と接着し、本発明の有機繊維-ゴム複合体31が形成される。
前記有機繊維の一例の有機繊維コードとは、タイヤ等のゴム物品の強度を補うために使用されるものである。前記有機繊維コードを補強材として使用する際には、まず、紡糸された有機繊維の原糸を撚糸することで有機繊維コードとする。そして、当該有機繊維コードを、接着剤組成物を用いて、当該有機繊維コードを被覆するゴムに埋設して加硫を行い接着させることにより有機繊維-ゴム複合体を作製し、この有機繊維-ゴム複合体を、タイヤ等のゴム物品の補強部材として使用することができる。
本発明の有機繊維-ゴム複合体を構成する被覆ゴム組成物は、ゴム成分に、通常ゴム業界で用いられる各種配合剤を配合したものが好ましい。ここで、ゴム成分としては、特に限定はなく、例えば、天然ゴムの他、ポリイソプレンゴム(IR)、ポリブタジエンゴム(BR)、スチレン-ブタジエン共重合体ゴム(SBR)、アクリロニトリル-ブタジエンゴム(NBR)、クロロプレンゴム(CR)、ブチルゴム(IIR)等の共役ジエン系合成ゴム、更には、エチレン-プロピレン共重合体ゴム(EPM)、エチレン-プロピレン-ジエン共重合体ゴム(EPDM)、ポリシロキサンゴム等が挙げられる。これらの中でも、天然ゴムおよび共役ジエン系合成ゴムが好ましい。また、これらゴム成分は、一種単独で用いてもよく、二種以上を組み合わせて用いてもよい。
本発明の有機繊維-ゴム複合体は、有機繊維コード等の有機繊維を、本発明の接着剤組成物により被覆して接着剤層を形成し、前記接着剤組成物中の(A)不飽和ジエンを有するゴムラテックスと、前記有機繊維の被着体である被覆ゴム組成物中のゴム成分とを共加硫して接着させることにより、製造する。
本発明のタイヤは、上述の有機繊維-ゴム複合体を用いたものである。これにより、レゾルシンを用いることなく良好な接着性を得ることができ、環境性や生産性が良好なタイヤとすることができる。
以下の比較例1~5及び実施例1~13においては、(A)不飽和ジエンを有するゴムラテックスとして、ビニルピリジン-スチレン-ブタジエン共重合体ラテックスを、特開平9-78045号公報に記載の比較例1に準拠して、以下の通り調製し、使用した。
以下の比較例4~5、実施例1~13においては、(B)一分子中にアミド基及びアミノ基を含む化合物成分として、ジエチレンテトラミンとトール油脂肪酸から得られるダイマー酸を縮合したポリアミドアミンからなる化合物成分(B-1)と、トリエチレンテトラミンとトール油脂肪酸から得られるダイマー酸を縮合したポリアミドアミンとビスフェノールAジグリシジルエーテルの付加物からなる化合物成分(B-2)と、を用いた。
以下の比較例2~3、実施例1~13においては、(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物として、(C-1)メチルエチルケトオキシムブロック-ジフェニルメタンジイソシアネート化合物である、明成化学工業株式会社製の「DM-6400」(ブロック剤熱解離温度:約130℃、固形分濃度40質量%)、(C-2)(熱解離性ブロックド)イソシアネート基を有する水性化合物である、第一工業製薬株式会社製の商品名「エラストロンBN77(F-2955D-1)」(ブロック剤熱解離温度:約160℃、pH8.0、固形分濃度31質量%)をそのまま用いた。
以下の実施例7~9、11~13においては、(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分として、水溶性のポリフェノールとして、(D-1)スルホン化度を低減させた部分脱スルホン化リグニンスルホン酸塩である、東京化成工業株式会社製の商品名「リグニン(アルカリ)」、(D-2)クラフトリグニンである、Sigma-Aldrich Co.LLC社製の商品名「Lignin,alkali」、(D-3)縮合型タンニンである、川村通商株式会社製の商品名「ミモザ」を用い、これら固体の粉末のポリフェノールは、脱イオン水で溶解して、固形分濃度10質量%の水溶液を製造し、該水溶液を接着剤組成物の調製に使用した。
以下の実施例10~13においては、(E)多価金属塩として、(E-1)銅の多価金属塩である、東京化成工業株式会社製の商品名「グルコン酸銅(II)」、(E-2)鉄の多価金属塩である、ナカライテスク株式会社製の商品名「塩化鉄(II)四水和物」を、脱イオン水に攪拌して固形分濃度0.5質量%になるように溶解して、該水溶液を接着剤組成物の調製に使用した。
上記(A)ゴムラテックスと、水とを、表2に示すように配合(Wet配合)し、固形分濃度が17質量%となるように量を調節して混合した後、十分に攪拌を行い、ラテックス接着剤組成物(比較例1)を得た。
上記(A)不飽和ジエンを有するゴムラテックスと、上記(C-1~C-2)の(熱解離性ブロックド)イソシアネート基を有する水性化合物とを、表2に示すように配合(Wet配合)し、接着剤組成物の固形分濃度が17質量%となるように水で量を調節して混合した後、十分に攪拌を行い、イソシアネート基を有する水性化合物-ラテックス接着剤組成物(比較例2~3)を得た。
上記(A)不飽和ジエンを有するゴムラテックスと、上記(B-1~B-2)の一分子中にアミド基及びアミノ基を含む化合物とを、表2に示すように配合(Wet配合)し、接着剤組成物の固形分濃度が17質量%となるように水で量を調節して混合した後、十分に攪拌を行い、アミド基及びアミノ基を含む化合物-ラテックス接着剤組成物(比較例4~5)を得た。
表2及び表3の配合(Wet配合)に示すように、各所定の、希釈用の水、(E)多価金属塩(実施例10~13)、(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分(実施例7~9、11~12)、(B)一分子中にアミド基及びアミノ基を含む化合物(実施例1~13)、(A)不飽和ジエンを有するゴムラテックス(実施例1~13)、及び、(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物(実施例1~13)を、この順番にて配合し、接着剤組成物の固形分濃度が17質量%となるように混合した後、十分に攪拌を行い、本発明の一実施形態である接着剤組成物(実施例1~13)を得た。
有機繊維コードとして、撚構造が1400dtex/2、上撚数が39回/10cm、下撚数が39回/10cmの66ナイロン製のタイヤコードを用いた。
次いで、乾燥ゾーンにおける乾燥(135℃、80秒)、ホットゾーンにおける張力(33N/本)を加えながらの樹脂の熱硬化(235℃、60秒)、ノルマライズゾーンにおける上記張力を緩めながらの熱硬化(235℃、60秒)に順次供して、比較例1~5及び実施例1~13の各接着剤組成物で被覆されたタイヤコードを取得した。
上記比較例1~5及び実施例1~13の各接着剤組成物で被覆されたタイヤコードを、未加硫のゴム組成物に埋め込み、160℃×20分で共加硫した。なお、被覆用の未加硫のゴム組成物としては、天然ゴム、スチレン-ブタジエンゴム、カーボンブラック及び加硫系薬品等を含むゴム組成物を用いた。
各比較例及び実施例の接着剤組成物の作業性に関して、以下の評価を行った。
各接着剤組成物の機械的安定性(凝固率)を、JIS K6392-1995に示される共重合体ラテックス組成物のマロン式機械的安定度試験機(熊谷理機工業株式会社製、マロン安定度試験機No.2312-II)を用いた方法に準拠して、測定した。
凝固率(%)=[(発生した凝固物の乾燥質量)/(供試の接着剤液の固形分質量)]×100
有機繊維コードである上記66ナイロン製のタイヤコードについて、各接着剤組成物を貯留する浸漬処理機にて、2000m連続処理をし、上記絞りロール上に各接着剤組成物が付着した量を目視し、次の5段階で評価した。
特大:特に多い。
大:多い。
中:中程度。
少:少ない。
微少:非常に少ない。
各比較例及び実施例の接着剤組成物の接着性に関して、以下の評価を行った。
各接着剤組成物を使用して得られたタイヤコード-ゴム複合体を300mm/分の速度にて引張することで、タイヤコードを上記タイヤコード-ゴム複合体から剥離し、タイヤコード1本あたりの剥離抗力を求めて、これを接着力(N/本)とした。
上記タイヤコード-ゴム複合体から剥離させたタイヤコードについて、被覆ゴムの付着状態を目視観察し、下記表1に従い、スコア付けを行った。
各比較例及び実施例の接着剤組成物の各配合を、下記表2及び表3に、その作業性評価及び接着性評価の結果を、下記表2及び表3に、それぞれ示す。
(B-2):アミド基及びアミノ基を含む化合物、トリエチレンテトラミンとトール油脂肪酸から得られるダイマー酸を縮合したポリアミドアミンとビスフェノールAジグリシジルエーテルの付加物、T&K TOKA株式会社製、商品名「トーマイドTXS-53-C」、水に可溶、アミン価:195~215、固形分濃度40質量%
(C-2):(熱解離性ブロックド)イソシアネート基を有する水性化合物、第一工業製薬株式会社製、商品名「エラストロンBN77(F-2955D-1)」(ブロック剤熱解離温度:約160℃、pH8.0、固形分濃度31質量%)、水分散液
(D-2):ポリフェノール(クラフトリグニン)、Sigma-Aldrich Co.LLC社製、商品名「Lignin,alkali」(CAS Number:8068-05-1)、クラフトリグニン、固形粉体
(D-3):ポリフェノール(縮合型タンニン)、川村通商株式会社製、商品名「ミモザ」、固形粉体
(E-2):多価金属塩(鉄化合物)、ナカライテスク株式会社製、商品名「塩化鉄(II)四水和物」(CAS Number:13478-10-9、純度98%以上)、固形粉体
2:接着剤組成物
3:浸漬用浴槽(ディッピング槽)
4:接着剤組成物で被覆された有機繊維コード
5:絞りロール
6:乾燥ゾーン
7:ホットゾーン
8:ノルマライズゾーン
31:有機繊維-ゴム複合体
32:接着剤組成物による接着剤層
33:被覆ゴム組成物
Claims (29)
- (A)不飽和ジエンを有するゴムラテックスと、
(B)一分子中にアミド基及びアミノ基を含む化合物と、
(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物と、
を含むことを特徴とする、接着剤組成物。 - 更に、下記(D)~(E):
(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分、
(E)多価金属塩
からなる群から選択される1種以上の成分を含む、請求項1に記載の接着剤組成物。 - 前記(A)不飽和ジエンを有するゴムラテックスが、天然ゴム(NR)、イソプレンゴム(IR)、スチレン-ブタジエン共重合体ゴム(SBR)、ブタジエンゴム(BR)、エチレン-プロピレン-ジエンゴム(EPDM)、クロロプレンゴム(CR)、ハロゲン化ブチルゴム、アクリロニリトル-ブタジエン共重合体ゴム(NBR)及びビニルピリジン-スチレン-ブタジエン共重合体ゴム(Vp)からなる群から選択される少なくとも一種を含む、請求項1に記載の接着剤組成物。
- 前記(B)一分子中にアミド基及びアミノ基を含む化合物は、(B-1)ポリアミンと多価脂肪酸を含むアミド縮合物、又は(B-2)ポリアミンと多価脂肪酸を含むアミド縮合物のエポキシ付加物である、請求項1に記載の接着剤組成物。
- 前記(B)一分子中にアミド基及びアミノ基を含む化合物は、不飽和脂肪酸から得られるダイマー酸とポリアミンとを縮合した化合物である、請求項1に記載の接着剤組成物。
- 前記(B)一分子中にアミド基及びアミノ基を含む化合物は、トール油脂肪酸から得られるダイマー酸とポリアミンとを縮合した化合物である、請求項1に記載の接着剤組成物。
- 前記(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物が、(C-1)芳香環を有するポリイソシアネートと活性水素基を1個以上有するブロック剤との付加生成物からなる水分散性(熱解離性ブロックド)イソシアネート化合物である、請求項1に記載の接着剤組成物。
- 前記(C-1)芳香環を有するポリイソシアネートと活性水素基を1個以上有するブロック剤との付加生成物からなる水分散性(熱解離性ブロックド)イソシアネート化合物が、メチレンジフェニルジイソシアネートのブロック体である、請求項7に記載の接着剤組成物。
- 前記(C)(熱解離性ブロックド)イソシアネート基を有する水性化合物が、(C-2)(熱解離性ブロックド)イソシアネート基を有する水性ウレタン化合物である、請求項1に記載の接着剤組成物。
- 前記(C-2)(熱解離性ブロックド)イソシアネート基を有する水性ウレタン化合物が、
(α)3個以上、5個以下の官能基を有する、数平均分子量が2,000以下の有機ポリイソシアネート化合物、
(β)2個以上、4個以下の活性水素基を有する、数平均分子量が5,000以下の化合物、
(γ)熱解離性ブロック剤、及び、
(δ)少なくとも1つの活性水素基と、アニオン性、カチオン性又は非イオン性である少なくとも1つの親水基と、を有する化合物、
を、(α)、(β)、(γ)及び(δ)の総和量に対する、それぞれの混合比率が、
(α)については、40質量%以上、85質量%以下、
(β)については、5質量%以上、35質量%以下、
(γ)については、5質量%以上、35質量%以下、及び、
(δ)については、5質量%以上、35質量%以下、
になるように混合して、反応させた後の反応生成物であって、且つ、
イソシアネート基(-NCO)の分子量を42としたときの、前記反応生成物中における、(熱解離性ブロックド)イソシアネート基の構成比率が、0.5質量%以上、11質量%以下である、請求項9に記載の接着剤組成物。 - 前記(C-2)(熱解離性ブロックド)イソシアネート基を有する水性ウレタン化合物が、下記一般式(1):
[式(1)中、
Aは、有機ポリイソシアネート化合物の、活性水素基が脱離した残基、
Xは、2個以上、4個以下の水酸基を有する、数平均分子量が5,000以下のポリオール化合物の、活性水素基が脱離した残基、
Yは、熱解離性ブロック剤の、活性水素基が脱離した残基、
Zは、少なくとも1つの活性水素基と、少なくとも1つの塩を生成する基又は親水性ポリエーテル鎖と、を有する化合物の、活性水素基が脱離した残基、
nは、2以上4以下の整数、
p+mは、2以上4以下の整数(m≧0.25)
を表す]で表される、請求項9に記載の接着剤組成物。 - 前記(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分が、分子内に複数のフェノール性ヒドロキシ基を有する植物由来の成分である、請求項2に記載の接着剤組成物。
- 前記(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分が、リグニン、タンニン、タンニン酸、フラボノイド、又は、その誘導体である、請求項12に記載の接着剤組成物。
- 前記(D)分子内に複数のフェノール性ヒドロキシ基を有する水性成分が、リグニンスルホン酸の誘導体である、請求項13に記載の接着剤組成物。
- 前記(E)多価金属塩が、2価以上の金属イオンの塩である、請求項2に記載の接着剤組成物。
- 前記(E)多価金属塩が、水溶性であり、且つ4配位又は6配位の多価金属イオンとなる金属塩である、請求項2に記載の接着剤組成物。
- 前記(E)多価金属塩が、銅を含む金属塩である、請求項2に記載の接着剤組成物。
- レゾルシンを含まない、請求項1に記載の接着剤組成物。
- ゴムとの接着用である、請求項1に記載の接着剤組成物。
- 有機繊維との接着用である、請求項1に記載の接着剤組成物。
- ゴムと有機繊維との接着用である、請求項1に記載の接着剤組成物。
- 有機繊維と、該有機繊維の表面を被覆する接着剤層と、を具える有機繊維材料であって、
前記接着剤層が、請求項1に記載の接着剤組成物からなることを特徴とする、有機繊維材料。 - 前記有機繊維が、複数本のフィラメントを撚り合わせてなる有機繊維コードである、請求項22に記載の有機繊維材料。
- 前記有機繊維コードが、下撚りと上撚りを掛けてなり、撚り合わせてなるコードの繊維太さは、100dtex~5000dtexであり、撚り合わせる撚数は、下撚数が10~50回/10cm、上撚数が10~50回/10cmである、請求項23に記載の有機繊維材料。
- 前記接着剤層が、乾燥質量で、前記有機繊維コードの質量の0.5~6.0質量%である、請求項22に記載の有機繊維材料。
- 前記有機繊維が、ナイロン樹脂からなる、請求項22に記載の有機繊維材料。
- 請求項22に記載の有機繊維材料により補強されていることを特徴とする、ゴム物品。
- 有機繊維とゴムとの複合体であって、該有機繊維が、請求項1に記載の接着剤組成物により被覆されていることを特徴とする、有機繊維-ゴム複合体。
- 請求項28に記載の有機繊維-ゴム複合体を用いたことを特徴とする、タイヤ。
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| JP2022-122326 | 2022-07-29 | ||
| JP2022122326A JP2024018788A (ja) | 2022-07-29 | 2022-07-29 | 接着剤組成物、有機繊維材料、ゴム物品、有機繊維-ゴム複合体及びタイヤ |
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| Publication Number | Publication Date |
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| WO2024024247A1 true WO2024024247A1 (ja) | 2024-02-01 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2023/019569 Ceased WO2024024247A1 (ja) | 2022-07-29 | 2023-05-25 | 接着剤組成物、有機繊維材料、ゴム物品、有機繊維-ゴム複合体及びタイヤ |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20260015530A1 (ja) |
| EP (1) | EP4563670A4 (ja) |
| JP (1) | JP2024018788A (ja) |
| WO (1) | WO2024024247A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025225620A1 (ja) * | 2024-04-25 | 2025-10-30 | 国立大学法人 東京大学 | 共役ジエン系重合体の溶解方法、ゴム組成物及びその製造方法、並びに接着剤及びそれを用いた積層体 |
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| JPS6351474A (ja) | 1986-08-21 | 1988-03-04 | Nippon Oil & Fats Co Ltd | 塗装用プライマー組成物 |
| JPH0753858A (ja) | 1993-08-09 | 1995-02-28 | Mitsubishi Gas Chem Co Inc | 熱可塑性樹脂組成物 |
| JPH0978045A (ja) | 1995-09-14 | 1997-03-25 | Bridgestone Corp | 接着剤組成物 |
| JP2002146028A (ja) | 2000-11-09 | 2002-05-22 | Nippon Paper Industries Co Ltd | 変性リグニンスルホン酸塩及び用途 |
| JP2005213412A (ja) * | 2004-01-30 | 2005-08-11 | Teijin Techno Products Ltd | ゴム・繊維複合体 |
| JP2012224962A (ja) * | 2011-04-20 | 2012-11-15 | Bridgestone Corp | 有機繊維コード用接着剤組成物、並びにそれを用いたゴム補強材、タイヤおよび接着方法 |
| WO2013017421A1 (fr) | 2011-08-04 | 2013-02-07 | Compagnie Generale Des Etablissements Michelin | Composition adhesive aqueuse a base de polyaldehyde et de polyphenol |
| JP2016135834A (ja) | 2015-01-23 | 2016-07-28 | 日本製紙株式会社 | リグニンスルホン酸塩の製造方法 |
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| WO2021221075A1 (ja) * | 2020-04-30 | 2021-11-04 | 株式会社ブリヂストン | 有機繊維コード用接着剤組成物、ゴム-有機繊維コード複合体及びタイヤ |
| US20240117224A1 (en) * | 2020-12-23 | 2024-04-11 | Bridgestone Corporation | Adhesive composition for organic fiber, organic fiber-rubber composite, and tire |
-
2022
- 2022-07-29 JP JP2022122326A patent/JP2024018788A/ja active Pending
-
2023
- 2023-05-25 WO PCT/JP2023/019569 patent/WO2024024247A1/ja not_active Ceased
- 2023-05-25 EP EP23845985.3A patent/EP4563670A4/en active Pending
- 2023-05-25 US US18/874,718 patent/US20260015530A1/en active Pending
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| JPH0978045A (ja) | 1995-09-14 | 1997-03-25 | Bridgestone Corp | 接着剤組成物 |
| JP2002146028A (ja) | 2000-11-09 | 2002-05-22 | Nippon Paper Industries Co Ltd | 変性リグニンスルホン酸塩及び用途 |
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| WO2022065206A1 (ja) * | 2020-09-23 | 2022-03-31 | 株式会社ブリヂストン | ゴム-樹脂間接着剤組成物、有機繊維コード-ゴム複合体及びタイヤ |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025225620A1 (ja) * | 2024-04-25 | 2025-10-30 | 国立大学法人 東京大学 | 共役ジエン系重合体の溶解方法、ゴム組成物及びその製造方法、並びに接着剤及びそれを用いた積層体 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20260015530A1 (en) | 2026-01-15 |
| EP4563670A4 (en) | 2025-11-26 |
| EP4563670A1 (en) | 2025-06-04 |
| JP2024018788A (ja) | 2024-02-08 |
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