WO2021166882A1 - 結晶性ポリエステル樹脂及びそれを用いた接着剤組成物 - Google Patents
結晶性ポリエステル樹脂及びそれを用いた接着剤組成物 Download PDFInfo
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- WO2021166882A1 WO2021166882A1 PCT/JP2021/005631 JP2021005631W WO2021166882A1 WO 2021166882 A1 WO2021166882 A1 WO 2021166882A1 JP 2021005631 W JP2021005631 W JP 2021005631W WO 2021166882 A1 WO2021166882 A1 WO 2021166882A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/027—Thermal properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/199—Acids or hydroxy compounds containing cycloaliphatic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/20—Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/66—Polyesters containing oxygen in the form of ether groups
- C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/672—Dicarboxylic acids and dihydroxy compounds
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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
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
- C09J167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/414—Additional features of adhesives in the form of films or foils characterized by the presence of essential components presence of a copolymer
-
- 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
- C09J2467/00—Presence of polyester
Definitions
- the present invention relates to a crystalline polyester resin and an aqueous polyester resin dispersion. More specifically, the present invention relates to an adhesive containing a polyester resin aqueous dispersion as a main component and particularly excellent in storage stability, adhesiveness, blocking resistance and water resistance.
- Polyester resin is widely used as a raw material for resin compositions used in paints, coating agents, adhesives, and the like.
- Polyester resins are generally composed of polyvalent carboxylic acids and polyhydric alcohols. By combining with the selection of polyvalent carboxylic acid and polyhydric alcohol, the high and low molecular weight can be freely controlled, and the obtained polyester resin is used in various applications such as paint applications and adhesive applications.
- polyester resin In the molecular design of polyester resin, it is important to select the copolymerization component.
- the multivalent carboxylic acid component and the polyhydric alcohol component are roughly classified into aromatics, aliphatics, alicyclics and the like. By selecting these components, the glass transition temperature indicating the flexibility of the polyester resin can be determined.
- it As a form of use, it is generally used as an organic solvent-dissolved product or an aqueous dispersion by applying it to a base material, but in recent years, an aqueous dispersion has been demanded due to environmental problems.
- polyester containers with excellent transparency and recyclability have been widely used as packaging materials for fresh foods such as vegetables and fruits.
- the expiration date of fresh food can be extended, and it is attracting attention as one candidate for the food distribution revolution.
- the lid material of the packaging material is required to have hygiene, reliable adhesiveness until the contents are taken out, blocking resistance at the time of film winding, and water resistance without fogging due to moisture of the contents. ..
- Patent Document 1 proposes an aqueous dispersion containing a polyester resin (A) having a glass transition temperature of 50 ° C. or higher and a polyester resin (B) having a glass transition temperature of 30 ° C. or lower.
- the linear aliphatic diol component of 4 to 10 is 75 mol% or more
- the melting point is 90 ° C. or more and 130 ° C. or less
- the polyvalent carboxylic acid component has a sulfonic acid metal salt.
- a crystalline copolymer polyester resin containing an aromatic dicarboxylic acid in the range of 2 mol% or more and 5 mol% or less and having an acid value of less than 4 KOH mg / g has been proposed.
- the polyester resin (B) is amorphous, and the peel strength described in the examples is not practical, and there is a problem in achieving both blocking resistance and heat sealability. .. Further, in Patent Document 2, although it is a crystalline polyester resin, it contains an aromatic dicarboxylic acid having a sulfonic acid metal salt, and has problems in hygiene and water resistance.
- the present invention has found that a crystalline polyester that does not use a metal sulfonic acid salt has high adhesiveness, blocking resistance, and water resistance, and has completed the present invention. It is a thing.
- an object of the present invention is to provide an adhesive composition having excellent storage stability, high adhesiveness, blocking resistance, and water resistance.
- the polyvalent carboxylic acid component and the polyhydric alcohol component are copolymerized components, and the polyvalent carboxylic acid component contains 30 to 70 mol% of terephthalic acid and 10 to 60 mol% of 1,4-cyclohexanedicarboxylic acid.
- the content of the aromatic dicarboxylic acid component having a sulfonic acid base as the polyvalent carboxylic acid component of the crystalline polyester resin is preferably less than 1 mol%.
- a polyester resin aqueous dispersion containing the crystalline polyester resin An adhesive composition containing the polyester resin aqueous dispersion.
- An adhesive composition containing the polyester resin aqueous dispersion A laminated film characterized by laminating the adhesive composition and a thermoplastic resin film.
- the thermoplastic resin film is preferably a polyester-based resin film, and the thickness of the adhesive composition layer is preferably in the range of 1 to 10 ⁇ m.
- a packaging material containing the laminated film as a constituent component A lid material for a food packaging container containing the packaging material as a constituent.
- a food packaging container that is a laminate of the lid material and a polyester resin.
- the crystalline polyester resin of the present invention can produce an aqueous dispersion having excellent storage stability, adhesiveness, blocking resistance and water resistance without using a metal sulfonic acid salt.
- the adhesive composition using the crystalline polyester resin aqueous dispersion is excellent in adhesiveness to a base material when heat-sealed as a lid material of a packaging container.
- it since it uses FDA-approved raw materials, it is excellent in safety and can be suitably used as a packaging material for fresh foods and the like.
- the crystalline polyester resin of the present invention has a chemical structure that can be obtained by a polycondensate of a polyvalent carboxylic acid and a polyhydric alcohol, and the polyvalent carboxylic acid and the polyhydric alcohol are one or more kinds, respectively. It consists of selected ingredients.
- aromatic dicarboxylic acid alicyclic dicarboxylic acid and / or aliphatic dicarboxylic acid are preferable.
- the copolymerization amount of terephthalic acid needs to be 30 to 70 mol%, preferably 35 to 65 mol%, and more preferably 40. ⁇ 60 mol%.
- the copolymerization amount By setting the copolymerization amount to 30 mol% or more, the obtained polyester resin becomes crystalline and the blocking resistance becomes good. Further, when it is 70 mol% or less, the melting point does not become too high, and it can be melted by the amount of heat at the time of heat sealing, and the adhesiveness becomes good.
- the copolymerization amount of 1,4-cyclohexanedicarboxylic acid needs to be 10 to 60 mol%, preferably 15 to 55 mol%. , More preferably 20 to 50 mol%.
- the copolymerization amount By setting the copolymerization amount to 10 mol% or more, the glass transition temperature of the obtained polyester resin does not become too high, and the adhesiveness becomes good. Further, when the content is 60 mol% or less, the crystallinity of the polyester resin is increased and the blocking resistance is improved.
- the total copolymerization amount of terephthalic acid and 1,4-cyclohexanedicarboxylic acid is preferably 40 mol% or more, more preferably 50 mol%.
- the above is more preferably 60 mol% or more, further preferably 70 mol% or more, and particularly preferably 80 mol% or more. Further, it is preferably 99 mol% or less, more preferably 95 mol% or less, and further preferably 90 mol% or less.
- the adhesiveness and blocking resistance are improved.
- the copolymerization amount of the aliphatic dicarboxylic acid is preferably 40 mol% or less, more preferably 35 mol% or less, still more preferably 30 mol% or less.
- the content is 40 mol% or less, the hydrolysis resistance of the crystalline polyester resin is improved and the water resistance is improved.
- copolymerizing an aliphatic dicarboxylic acid it is preferably 5 mol% or more, more preferably 10 mol% or more.
- polyvalent carboxylic acid components other than terephthalic acid and 1,4-cyclohexanedicarboxylic acid include isophthalic acid, orthophthalic acid, 2,6-naphthalenedicarboxylic acid, dimethyl 2,6-naphthalenedicarboxylic acid, trimellitic acid, and adipic acid. It is preferable to use sebacic acid, fumaric acid, maleic acid or dimeric acid, and these may be used alone or in combination of two or more. These compounds are raw materials that have been described and approved in the FDA (Food and Drug Administration) standard 175.300 (b) (3) (vii) (revised April 1, 2014), and are used as materials for food packaging. Can be preferably used.
- the copolymerization amount of these polyvalent carboxylic acid components is preferably 40 mol% or less, more preferably 35 mol% or less, and 30 mol% when the total amount of the polyvalent carboxylic acid components is 100 mol%. The following is more preferable.
- the content is 40 mol% or less, the hydrolysis resistance of the crystalline polyester resin is improved and the water resistance is improved.
- the lower limit is not particularly limited, but when these polyvalent carboxylic acids are copolymerized, it is preferably 5 mol% or more, more preferably 10 mol% or more.
- the copolymerization amount of 1,4-butanediol needs to be 50 mol% or more, preferably 60 mol% or more, and 70 mol% or more. More preferably, 80 mol% or more is further preferable, 90 mol% or more is further preferable, 95 mol% or more is particularly preferable, and 100 mol% may be used.
- the content is 50 mol% or more, the obtained polyester resin becomes crystalline and the blocking resistance becomes good.
- the polyhydric alcohol component other than 1,4-butanediol it is preferable to use the compound described in FDA standard 175.300 (b) (3) (vii) (revised April 1, 2014).
- Specific examples thereof include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 2,2-dimethyl-1,3-propanediol, glycerol, mannitol, pentaerythritol, trimethylolethane, and trimethylolpropane.
- the copolymerization amount of these polyhydric alcohol components needs to be 50 mol% or less, preferably 40 mol% or less, and 30 mol% or less, when the total amount of the polyhydric alcohol components is 100 mol%.
- mol% or less is further preferable, 10 mol% or less is further preferable, 5 mol% or less is particularly preferable, and 0 mol% may be used.
- the content is 50 mol% or less, the obtained polyester resin becomes crystalline and the blocking resistance becomes good.
- a branched structure by copolymerizing a small amount of a trifunctional or higher functional polyvalent carboxylic acid component or polyhydric alcohol component in the crystalline polyester resin of the present invention.
- a layer of a tougher adhesive composition (hereinafter, also referred to as an adhesive layer) can be formed, and the effect of improving water resistance can be exhibited.
- Specific examples thereof include trimellitic anhydride, ethylene glycol bisamhydrotrimellitic acid, trimethylolpropane, glycerin, and pentaerythritol.
- the copolymerization amount of these trifunctional or higher functional polyvalent carboxylic acid components and polyhydric alcohol components is 0.5 mol% or more when the total amount of the total polyvalent carboxylic acid component and the total polyhydric alcohol component is 200 mol%. Is preferable, and more preferably 1 mol% or more. Further, it is preferably 5 mol% or less, more preferably 4 mol% or less, and further preferably 3 mol% or less.
- the content of the aromatic dicarboxylic acid component having a sulfonic acid base is preferably less than 1 mol%. It is more preferably 0.5 mol% or less, further preferably 0.1 mol% or less, and particularly preferably 0 mol% or less. Since the aromatic dicarboxylic acid component having a sulfonic acid base is an acid component not approved by the FDA, the crystalline polyester resin of the present invention can be used for food contact by reducing the amount of the aromatic dicarboxylic acid component having a sulfonic acid base. Can be used.
- Examples of the aromatic dicarboxylic acid component having a sulfonic acid base include 5-sulfoisophthalic acid, 4-sulfonaphthalene-2,7-dicarboxylic acid, 5 [4-sulfophenoxy] isophthalic acid, and alkali metal salts thereof. Be done.
- Examples of the alkali metal salt include lithium, sodium, potassium and the like. Specific examples thereof include sodium 5-sulfonatoisophthalate, potassium 5-sulfonatoisophthalate, sodium 4-sulfonaphthalene-2,7-dicarboxylic acid, and sodium 5 [4-sulfophenoxy] isophthalate.
- the content of the polyhydric alcohol component having a sulfonic acid base is preferably less than 1 mol%. It is more preferably 0.5 mol% or less, further preferably 0.1 mol% or less, and particularly preferably 0 mol% or less. Since the polyhydric alcohol component having a sulfonic acid base is an alcohol component not approved by the FDA, the crystalline polyester resin of the present invention is used for food contact applications by reducing the amount of the polyhydric alcohol component having a sulfonic acid base. be able to.
- polyhydric alcohol component having a sulfonic acid base examples include a sodium salt of 2-sulfo-1,4-butanediol, a sodium salt of 2,5-dimethyl-3-sulfo-2,5-hexanediol, and the like. Be done.
- an acid anhydride such as trimellitic anhydride or pyromellitic anhydride may be added (post-added) after the polyester resin is polymerized.
- an acid anhydride such as trimellitic anhydride or pyromellitic anhydride
- the total amount of the multivalent carboxylic acid component and the polyhydric alcohol component may exceed 200 mol%.
- the total amount of the composition excluding the component to which acid anhydride or the like is post-added (post-added) shall be calculated as 200 mol%.
- the polymerization catalyst for example, titanium compounds such as tetra-n-butyl titanate, tetraisopropyl titanate and titaniumoxyacetylcetonate, antimony trioxide, tributoxyantimony and the like can be used.
- Antimony compounds, germanium oxides, germanium compounds such as tetra-n-butoxygermanium, and acetates such as magnesium, iron, zinc, manganese, cobalt, and aluminum can be used. These catalysts may be used alone or in combination of two or more.
- the method of the polymerization condensation reaction for producing the crystalline polyester resin of the present invention is not particularly limited, but for example, 1) a polyvalent carboxylic acid and a polyhydric alcohol are heated in the presence of an arbitrary catalyst to carry out a dehydration esterification step. A method of carrying out a depolyhydric alcohol / polycondensation reaction. There is a method of carrying out the reaction. In the methods 1) and 2) above, a part or all of the acid component may be replaced with an acid anhydride.
- the glass transition temperature (Tg) of the crystalline polyester resin of the present invention is ⁇ 30 to 30 ° C., preferably ⁇ 25 to 25 ° C., and more preferably ⁇ 20 to 20 ° C.
- Tg glass transition temperature
- Crystallinity as used in the present invention means that the temperature is raised from ⁇ 100 ° C. to 250 ° C. at 20 ° C./min using a differential scanning calorimeter (DSC) and a clear melting peak is shown in the heating process. Point to.
- DSC differential scanning calorimeter
- the melting point (Tm) of the crystalline polyester resin of the present invention is 70 to 160 ° C, preferably 75 to 155 ° C, and more preferably 80 to 150 ° C.
- Tm melting point
- the melting point (Tm) of the crystalline polyester resin of the present invention is 70 to 160 ° C, preferably 75 to 155 ° C, and more preferably 80 to 150 ° C.
- the reduced viscosity ( ⁇ sp / c) of the crystalline polyester resin is preferably 0.2 to 1.2 dl / g. It is more preferably 0.4 to 1.1 dl / g, and even more preferably 0.6 to 1.0 dl / g.
- the resin cohesive force becomes good and excellent adhesiveness can be exhibited.
- the aqueous dispersion can be produced by setting the value to the upper limit or less.
- the reduced viscosity can be arbitrarily adjusted by changing the polymerization time, temperature, and the degree of reduced pressure during polymerization (in the case of reduced pressure polymerization) of the crystalline polyester resin.
- the reduced viscosity is a value measured using a Ubbelohde viscous tube at a sample concentration of 0.125 g / 25 ml, a measurement solvent of chloroform, and a measurement temperature of 25 ° C.
- the acid value of the crystalline polyester resin is 100 to 600 eq / t, preferably 150 to 550 eq / t, and more preferably 200 to 500 eq / t.
- the aqueous dispersion can be produced by setting the value to the above lower limit value or more.
- the number average molecular weight (Mn) of the crystalline polyester resin is preferably 4000 to 40,000. It is more preferably 6000 to 35000, and even more preferably 8000 to 30000. By setting the value to the lower limit or more, the resin cohesive force becomes good and excellent adhesiveness can be exhibited. Further, the aqueous dispersion can be produced by setting the value to the upper limit or less.
- the number average molecular weight can be arbitrarily adjusted by changing the polymerization time, temperature, and the degree of reduced pressure during polymerization (in the case of reduced pressure polymerization) of the crystalline polyester resin.
- the number average molecular weight is a value measured by gel permeation chromatography (hereinafter, GPC, standard substance: polystyrene resin, mobile phase: tetrahydrofuran or chloroform).
- the polyester resin aqueous dispersion of the present invention is an aqueous dispersion containing the crystalline polyester resin and water and, if necessary, an organic solvent.
- the boiling point of the organic solvent used in the polyester resin aqueous dispersion of the present invention is preferably 100 ° C. or higher, more preferably 105 ° C. or higher, further preferably 110 ° C. or higher, and 115 ° C. or higher. Is particularly preferable, and 120 ° C. or higher is most preferable.
- the boiling point is 100 ° C. or higher, the crystalline polyester resin can be melted and easily dispersed in water. Further, it is preferably 180 ° C. or lower, more preferably 175 ° C. or lower, further preferably 170 ° C. or lower, particularly preferably 165 ° C. or lower, and most preferably 160 ° C. or lower. ..
- the boiling point is 180 ° C. or lower, there is almost no residual solvent during drying, and problems such as blocking during winding do not occur.
- the organic solvent used in the aqueous dispersion of the polyester resin of the present invention is not particularly limited, but is limited to alcohols such as isopropyl alcohol, isobutyl alcohol and isoaminoalcohol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoisopropyl ether, and the like.
- Ethylene glycol monobutyl ether (hereinafter, also referred to as “n-butyl cellosolve” or “n-BuCS”), ethylene glycol mono-tert-butyl ether (hereinafter, also referred to as “t-butyl cellosolve” or “t-BuCS”), propylene Glycol monobutyl ether, methyl ethyl ketone and the like can be mentioned.
- These organic solvents can be used alone or in combination of two or more. Of these, n-butyl cellosolve and t-butyl cellosolve are particularly preferable.
- the amount of the organic solvent is preferably 200 parts by mass or less, more preferably 150 parts by mass or less, further preferably 100 parts by mass or less, and 50 parts by mass with respect to 100 parts by mass of the crystalline polyester resin.
- the following is particularly preferable.
- the lower limit is not particularly limited, but industrially, there is no problem as long as it is 1 part by mass or more, and 10 parts by mass or more may be used.
- Water is preferably 150 parts by mass or more, more preferably 170 parts by mass or more, and further preferably 200 parts by mass or more with respect to 100 parts by mass of the crystalline polyester resin.
- the value is not less than the lower limit, the crystalline polyester resin is dispersed in water, and the aqueous polyester resin dispersion of the present invention can be obtained. Further, it is preferably 500 parts by mass or less, more preferably 450 parts by mass or less, and further preferably 400 parts by mass or less. By setting the value to the upper limit or less, the production efficiency is improved, which is industrially advantageous.
- the particle size of the crystalline polyester resin phase contained in the aqueous polyester resin dispersion of the present invention is preferably 30 nm or more, more preferably 40 nm or more, further preferably 50 nm or more, and particularly preferably 60 nm or more.
- the film-forming property is improved, fusion and aggregation between dispersed particles are suppressed, and thickening and poor dispersion are not generated.
- 250 nm or less is preferable, 200 nm or less is more preferable, and 150 nm or less is further preferable.
- the particle size refers to the particle size of the crystalline polyester resin, and when two or more types of polyester resin are contained, such as containing another polyester resin, the average particles of the two or more types of polyester resin are contained. Refers to the diameter.
- polyester resin aqueous dispersion of the present invention can be suitably used as a raw material for a coating agent and a heat sealant in addition to an adhesive, and is particularly suitable for adhesive applications.
- the adhesive composition of the present invention is a composition containing the polyester resin aqueous dispersion as an essential component.
- the adhesive composition of the present invention can be used by blending other polyester resins, aqueous dispersions thereof, and various additives as long as the performance of the present invention is not impaired.
- the additive is not particularly limited, but it is preferable to use an anti-blocking inhibitor or the like.
- the anti-blocking agent examples include inorganic particles, organic particles, waxes, etc., which can be contained to the extent that the adhesiveness and blocking resistance are not deteriorated. These anti-blocking agents can be used alone or in combination of two or more.
- the antiblocking agent is contained, it is preferably 0.1 part by mass or more, and more preferably 0.2 part by mass or more with respect to 100 parts by mass of the crystalline polyester resin. By containing more than the lower limit value, the effect of blocking resistance can be exhibited. Further, it is preferably 5 parts by mass or less, and more preferably 3 parts by mass or less. Adhesiveness and transparency can be maintained by setting the value to the upper limit or less.
- Inorganic particles include, for example, oxides of metals such as magnesium, calcium, barium, zinc, zirconium, molybdenum, silicon, antimony, or titanium, hydroxides, sulfates, carbonates, silicates, and the like. Particles can be mentioned. Among these inorganic particles, silica gel particles are particularly preferable.
- the shape of the particles is not limited to any shape such as powder, granules, granules, flat plates, and needles.
- the organic particles include polymer particles such as polymethylmethacrylate resin, polystyrene resin, nylon resin, melamine resin, benzoguanamine resin, phenol resin, urea resin, silicon resin, methacrylate resin, or acrylate resin, or cellulose powder and nitrocellulose. Examples include powder, wood powder, used paper powder, rice husk powder, and starch.
- the polymer particles can be obtained by a polymerization method such as emulsion polymerization, suspension polymerization, dispersion polymerization, soap-free polymerization, or microsuspension polymerization.
- the organic particles can be used as long as the effects of the present invention are not impaired.
- the shape of the particles is not limited to any shape such as powder, granules, granules, flat plates, and needles.
- waxes include liquid paraffins, natural paraffins, microwaxes, synthetic paraffins, hydrocarbon waxes such as polyethylene wax, fatty acid waxes such as stearic acid, stearic acid amide, palmitate amide, and methylene bisstearo.
- Fatty acid-based amide waxes such as amide, ethylene bisstearoamide, oleic acid amide, and esilic acid amide, lower alcohol esters of fatty acids, polyhydric alcohol esters of fatty acids, ester waxes such as fatty acid polyglycol esters, cetyl alcohols, stearyl alcohols.
- alcohol-based waxes such as, olefin-based waxes, castor waxes, natural waxes such as carnauba wax, and metal soaps derived from fatty acids having 12 to 30 carbon atoms.
- the waxes can be used as long as the effects of the present invention are not impaired.
- the laminated film of the present invention is a film in which an adhesive layer made of the adhesive composition of the present invention is laminated on at least one side of a base film.
- the laminated film is obtained by applying an adhesive composition to a base film and then performing a drying treatment.
- the base film is not particularly limited as long as it can form an adhesive layer from the adhesive composition of the present invention, but a thermoplastic resin film is preferable, and for example, a polyester resin film or a polypropylene resin.
- a thermoplastic resin film is preferable, and for example, a polyester resin film or a polypropylene resin.
- examples thereof include a film, a polyamide-based resin film, a polyvinyl alcohol-based resin film, and a polyvinylidene chloride-based resin film.
- a polyester-based resin film is more preferable because it is suitable as a lid material for food packaging containers.
- the thickness of the base film is preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more. When the value is equal to or higher than the lower limit, the durability of the base film is improved. Further, it is preferably 50 ⁇ m or less, more preferably 30 ⁇ m or less. By setting the value to the upper limit or less, it can be practically used as a lid material for food packaging containers.
- the thickness of the adhesive layer is preferably 1 ⁇ m or more, more preferably 2 ⁇ m or more.
- the adhesiveness is improved. Further, it is preferably 10 ⁇ m or less, more preferably 5 ⁇ m or less. By setting the value to the upper limit or less, the adhesiveness and heat sealability are improved.
- the laminated film of the present invention Since the laminated film of the present invention has excellent adhesiveness, it is suitable as a constituent component of a packaging material. Above all, it is suitable as a lid material for food packaging containers for fresh foods and the like. When used as a lid material for a food packaging container, the contents can be sealed by laminating the adhesive layer surface of the laminated film and the food packaging container.
- the food packaging container is not particularly limited, but is preferably a polyester resin.
- composition copolyester resin (1 H-NMR)
- polycarboxylic acid component constituting the copolyester were molar ratio Determination of polyhydric alcohol component .. Deuterated chloroform was used as the solvent.
- Crystal melting point (Tm) and glass transition temperature (Tg) Using a differential scanning calorimetry (DSC) DSC-220 manufactured by Seiko Instruments Co., Ltd., 5 mg of a sample (crystalline polyester resin) was sealed in an aluminum retainer lid type container, and from -100 ° C to 250 ° C, 20 ° C / The temperature was measured at the rate of temperature rise of 1 minute, and the maximum peak temperature of the heat of fusion was determined as the melting point of the crystal. Further, the glass transition temperature is the intersection of the extension line of the baseline below the glass transition temperature and the tangent line indicating the maximum inclination from the rising portion of the peak to the peak of the peak under the same conditions using the above measuring device. Obtained by temperature.
- DSC differential scanning calorimetry
- peeling strength (adhesiveness)
- the adhesive layer surface of the evaluation laminated film was heat-sealed on an unstretched amorphous PET sheet having a thickness of 350 ⁇ m at a temperature of 160 ° C. and a pressure of 2.8 kgf / cm 2 for 1 second. Then, a test piece having a width of 25 mm was cut out, and a 180 ° peeling test was performed at a tensile speed of 100 mm / min at 25 ° C. to measure the peeling strength.
- ⁇ Evaluation criteria> ⁇ : 800 gf / 25 mm or more ⁇ : 500 gf / 25 mm or more and less than 800 gf / 25 mm ⁇ : 500 gf / 25 mm or less
- a test sample was prepared by superimposing the adhesive layer surface of the laminated film for blocking resistance evaluation on the corona-untreated surface of a polyester film (manufactured by Toyobo Co., Ltd., E5107). Then, it was stored for one day under a pressure of 40 ° C. and 0.9 kgf / cm 2 , and the blocking resistance was confirmed according to the following criteria.
- ⁇ Evaluation criteria> ⁇ : There was no tack on the test sample. ⁇ : Although the test sample had a slight tack, it was within the range that did not cause any problem in use.
- X The test sample had a tack, which was within the range that caused a problem in use.
- Example of Crystalline Polyester Resin Synthesis of Crystalline Polyester Resin (A-1) 375 parts by mass of terephthalic acid in a reaction can equipped with a stirrer, a thermometer, a heating heater, a cooling device, and a distilling cooler. , 4-Cyclohexanedicarboxylic acid 225 parts by mass, adipic acid 132 parts by mass, trimellitic anhydride 9 parts by mass, 1,4-butanediol 813 parts by mass and tetrabutyl titanate 0.5 parts by mass, and heated to 220 ° C. While doing so, the esterification reaction was carried out over 4 hours.
- the pressure inside the system was reduced to 10 torr over 60 minutes while raising the temperature to 250 ° C., and the pressure was further reduced to 1 torr or less to carry out a polycondensation reaction at 250 ° C. to a predetermined viscosity. Then, nitrogen was allowed to flow through the system, the mixture was cooled to 220 ° C., 27 parts by mass of trimellitic anhydride was added, and the reaction was carried out for 30 minutes. After completion of the reaction, the crystalline polyester resin was taken out and cooled to obtain a crystalline polyester resin (A-1).
- Example 1 Production Example of Polyester Resin Aqueous Dispersion (B) Production of Polyester Resin Moisture Powder (B-1)
- the crystalline polyester resin (A-1) was water-dispersed according to the following procedure.
- a reaction vessel equipped with a stirrer, a condenser, and a thermometer was charged with 100 parts of crystalline polyester resin (A-1), 40 parts of ethylene glycol monobutyl ether, 120 parts of methyl ethyl ketone, and 30 parts of isopropyl alcohol, and took 3 hours at 80 ° C.
- the resin was dissolved.
- 3.6 parts of dimethylaminoethanol was added and stirred for 30 minutes.
- 260 parts of warm water was added and stirred for 1 hour.
- the adhesive composition according to the present invention and a laminated film using the same have excellent adhesiveness to a base material and also have blocking resistance when heat-sealed as a lid material of a packaging container.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polyesters Or Polycarbonates (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
Abstract
Description
本発明の結晶性ポリエステル樹脂は、多価カルボン酸と多価アルコールとの重縮合物によって得ることのできる化学構造からなり、多価カルボン酸と多価アルコールとはそれぞれ1種または2種以上の選択された成分からなるものである。
本発明のポリエステル樹脂水分散体は、前記結晶性ポリエステル樹脂および水を含有し、必要に応じて有機溶媒を含有する水分散体である。
また、180℃以下であることが好ましく、175℃以下であることがより好ましく、170℃以下であることがさらに好ましく、165℃以下であることが特に好ましく、160℃以下であることが最も好ましい。沸点が180℃以下であることで乾燥時の残留溶媒がほとんどなく、巻き取り時のブロッキングが発生する等の問題が生じなくなる。
本発明の接着剤組成物は、前記ポリエステル樹脂水分散体を必須成分として含有する組成物である。
本発明の積層フィルムは、基材フィルムの少なくとも片面に、本発明の接着剤組成物からなる接着剤層を積層したフィルムである。積層フィルムは基材フィルムに接着剤組成物を塗布した後、乾燥処理を行うことにより得られるものである。
400MHzの1H-核磁気共鳴スペクトル装置(1H-NMR)を用い、共重合ポリエステルを構成する多価カルボン酸成分、多価アルコール成分のモル比定量を行った。溶媒には重クロロホルムを使用した。
セイコーインスツルメンツ(株)製示差走査熱量分析計(DSC)DSC-220を用いて、アルミニウム押え蓋型容器にサンプル(結晶性ポリエステル樹脂)5mgを密封し、-100℃から250℃まで、20℃/分の昇温速度で測定し、融解熱の最大ピーク温度を結晶融点として求めた。また、ガラス転移温度は、前記測定装置を用いて、同様条件でガラス転移温度以下のベースラインの延長線とピークの立ち上がり部分からピークの頂点までの間での最大傾斜を示す接線との交点の温度で求めた。
ポリエステル樹脂水分散体を25℃下6か月保管(静置)し、外観、形状(粘度)変化を確認した。
<評価基準>
○:外観、形状(粘度)変化なし。
△:白濁したが形状(粘度)は変化なし。
×:粘度上昇が生じた、分離した、または分散不良が生じた。
実施例、比較例で得られた接着剤組成物を厚さ25μmのポリエステルフィルム(東洋紡株式会社製、E5107)のコロナ処理面に、乾燥後の厚みが3g/m2となるように塗布した。次いで160℃で30秒乾燥し、評価用積層フィルムを得た。
評価用積層フィルムの接着剤層面を、厚さ350μmの未延伸アモルファスPETシートに、温度160℃、圧力2.8kgf/cm2で、1秒間ヒートシールした。その後、25mm幅の試験片を切り取り、25℃において、引張速度100mm/minで180°剥離試験を行い、剥離強度を測定した。
<評価基準>
○:800gf/25mm以上
△:500gf/25mm以上800gf/25mm未満
×:500gf/25mm未満
評価用積層フィルムの接着剤層面をポリエステルフィルム(東洋紡株式会社製、E5107)のコロナ未処理面に重ね合わせ試験サンプルを作製した。その後、40℃、0.9kgf/cm2の圧力下で1日保管し、以下の判定基準により耐ブロッキング性を確認した。
<評価基準>
○:試験サンプルのタックが全く無かった。
△:試験サンプルにわずかにタックがあるものの、使用上問題にならない範囲であった。
×:試験サンプルにタックがあり、使用上問題となる範囲であった。
剥離強度の評価項目で作製した試験片を25℃の水に1日間浸した。その後、試験片を剥離強度の測定方法に準じて測定し、これを耐水性の評価とした。
<評価基準>
○:800gf/25mm以上
△:500gf/25mm以上800gf/25mm未満
×:500gf/25mm未満
結晶性ポリエステル樹脂(A-1)の合成
撹拌機、温度計、加熱ヒーター、冷却装置、溜出用冷却器を装備した反応缶内に、テレフタル酸375質量部、1,4-シクロヘキサンジカルボン酸225質量部、アジピン酸132質量部、無水トリメリット酸9質量部、1,4-ブタンジオール813質量部およびテトラブチルチタネート0.5質量部を仕込み、220℃まで昇温しつつ4時間かけてエステル化反応を行った。エステル化反応終了後、系内を250℃まで昇温しながら60分かけて10torrまで減圧し、さらに1torr以下の真空下まで減圧して250℃で所定粘度まで重縮合反応を行った。その後、系内に窒素を流し、220℃まで冷却し、無水トリメリット酸27質量部添加し、30分間反応した。反応終了後、結晶性ポリエステル樹脂を取り出し、冷却することにより結晶性ポリエステル樹脂(A-1)を得た。
結晶性ポリエステル樹脂(A-1)の合成例と同様に、ポリエステル樹脂(A-2)~(A-15)を合成した。樹脂組成および物性の測定結果を表1に示す。
ポリエステル樹脂水性分散体(B)の製造例
ポリエステル樹脂水分性散体(B-1)の製造
結晶性ポリエステル樹脂(A-1)を以下の手順に従い、水分散化を行った。攪拌機、コンデンサー、温度計を具備した反応容器に結晶性ポリエステル樹脂(A-1)100部、エチレングリコールモノブチルエーテル40部、メチルエチルケトン120部、イソプロピルアルコール30部を仕込み、80℃にて3時間かけて樹脂を溶解した。次いでジメチルアミノエタノール3.6部を投入し30分撹拌を行った。次いで温水260部を投入し、1時間攪拌を行った。その後内温を100℃まで昇温しながら、メチルエチルケトン、イソプロピルアルコールを溜去し、ポリエステル樹脂水性分散体(B-1)を得た。各種特性評価をおこなった結果を表2に示す。
実施例1の製造例と同様に、ポリエステル樹脂水分性散体(B-2)~(B-15)を得た。各種特性評価をおこなった結果を表2に示す。
Claims (10)
- 多価カルボン酸成分と多価アルコール成分を共重合成分とし、多価カルボン酸成分としてテレフタル酸を30~70モル%、1,4-シクロヘキサンジカルボン酸を10~60モル%含有し、多価アルコール成分として1,4-ブタンジオールを50モル%以上含有し、酸価が100~600eq/t、ガラス転移温度が-30~30℃、融点が70~160℃である結晶性ポリエステル樹脂。
- 多価カルボン酸成分としてスルホン酸塩基を有する芳香族ジカルボン酸成分の含有量が1モル%未満である請求項1に記載の結晶性ポリエステル樹脂。
- 請求項1または2に記載の結晶性ポリエステル樹脂を含有するポリエステル樹脂水分散体。
- 請求項3に記載のポリエステル樹脂水分散体を含有する接着剤組成物。
- 請求項4に記載の接着剤組成物と熱可塑性樹脂フィルムとを積層してなることを特徴とする積層フィルム。
- 請求項5に記載の熱可塑性樹脂フィルムがポリエステル系樹脂フィルムであることを特徴とする積層フィルム。
- 接着剤組成物層の厚みが1~10μmの範囲である請求項5または6に記載の積層フィルム。
- 請求項5~7のいずれかに記載の積層フィルムを構成成分に含む包装材。
- 請求項8に記載の包装材を構成成分に含む食品包装容器用の蓋材。
- 請求項9に記載の蓋材とポリエステル系樹脂の積層体である食品包装容器。
Priority Applications (5)
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|---|---|---|---|
| KR1020227031730A KR20220139982A (ko) | 2020-02-17 | 2021-02-16 | 결정성 폴리에스테르 수지 및 그것을 이용한 접착제 조성물 |
| US17/796,936 US20230078293A1 (en) | 2020-02-17 | 2021-02-16 | Crystalline polyester resin and adhesive composition using the same |
| EP21757582.8A EP4108457B1 (en) | 2020-02-17 | 2021-02-16 | Crystalline polyester resin and adhesive composition in which same is used |
| CN202180014328.7A CN115087684A (zh) | 2020-02-17 | 2021-02-16 | 结晶性聚酯树脂及使用其的粘接剂组合物 |
| JP2022501896A JP7659745B2 (ja) | 2020-02-17 | 2021-02-16 | 結晶性ポリエステル樹脂及びそれを用いた接着剤組成物 |
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| US (1) | US20230078293A1 (ja) |
| EP (1) | EP4108457B1 (ja) |
| JP (1) | JP7659745B2 (ja) |
| KR (1) | KR20220139982A (ja) |
| CN (1) | CN115087684A (ja) |
| TW (1) | TW202136361A (ja) |
| WO (1) | WO2021166882A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022202832A1 (ja) * | 2021-03-25 | 2022-09-29 | 東洋紡株式会社 | 結晶性ポリエステル樹脂およびポリエステル樹脂水分散体、ならびにそれを用いた接着用またはコーティング用の組成物 |
| EP4455209A4 (en) * | 2021-12-21 | 2025-12-31 | Toyobo Mc Corp | AQUEOUS POLYESTER RESIN DISPERSION COMPOSITION |
| US12630672B2 (en) | 2021-03-25 | 2026-05-19 | Toyobo Mc Corporation | Crystalline polyester resin and polyester resin aqueous dispersion, and composition for adhesion or coating use in which each of said crystalline polyester resin and polyester resin aqueous dispersion is used |
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- 2021-02-16 CN CN202180014328.7A patent/CN115087684A/zh active Pending
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- 2021-02-16 EP EP21757582.8A patent/EP4108457B1/en active Active
- 2021-02-16 US US17/796,936 patent/US20230078293A1/en not_active Abandoned
- 2021-02-16 JP JP2022501896A patent/JP7659745B2/ja active Active
- 2021-02-16 KR KR1020227031730A patent/KR20220139982A/ko not_active Abandoned
- 2021-02-17 TW TW110105222A patent/TW202136361A/zh unknown
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022202832A1 (ja) * | 2021-03-25 | 2022-09-29 | 東洋紡株式会社 | 結晶性ポリエステル樹脂およびポリエステル樹脂水分散体、ならびにそれを用いた接着用またはコーティング用の組成物 |
| EP4316837A4 (en) * | 2021-03-25 | 2025-03-26 | TOYOBO MC Corporation | Crystalline polyester resin and aqueous polyester resin dispersion, and composition for adhesion or coating use in which each of said crystalline polyester resin and aqueous polyester resin dispersion is used |
| US12630672B2 (en) | 2021-03-25 | 2026-05-19 | Toyobo Mc Corporation | Crystalline polyester resin and polyester resin aqueous dispersion, and composition for adhesion or coating use in which each of said crystalline polyester resin and polyester resin aqueous dispersion is used |
| EP4455209A4 (en) * | 2021-12-21 | 2025-12-31 | Toyobo Mc Corp | AQUEOUS POLYESTER RESIN DISPERSION COMPOSITION |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4108457A4 (en) | 2024-03-13 |
| KR20220139982A (ko) | 2022-10-17 |
| EP4108457B1 (en) | 2026-01-07 |
| CN115087684A (zh) | 2022-09-20 |
| JPWO2021166882A1 (ja) | 2021-08-26 |
| JP7659745B2 (ja) | 2025-04-10 |
| TW202136361A (zh) | 2021-10-01 |
| EP4108457A1 (en) | 2022-12-28 |
| US20230078293A1 (en) | 2023-03-16 |
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