WO2024128149A1 - 硬化性樹脂組成物、これを含むシール剤、およびこれらの硬化物 - Google Patents
硬化性樹脂組成物、これを含むシール剤、およびこれらの硬化物 Download PDFInfo
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- WO2024128149A1 WO2024128149A1 PCT/JP2023/043962 JP2023043962W WO2024128149A1 WO 2024128149 A1 WO2024128149 A1 WO 2024128149A1 JP 2023043962 W JP2023043962 W JP 2023043962W WO 2024128149 A1 WO2024128149 A1 WO 2024128149A1
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
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- 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
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
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- 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
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L43/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium or a metal; Compositions of derivatives of such polymers
- C08L43/04—Homopolymers or copolymers of monomers containing silicon
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1031—Sealing waxes, e.g. sealing letters, bottles, or the like
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
Definitions
- the present invention relates to a curable resin composition that can give a cured product that has high resistance to antifreeze (coolant), a sealant containing the same, and the cured product.
- JP 2008-274119 A describes a photocurable composition that is resistant to antifreeze (coolant). However, if the photocurable composition contains fillers or colored powder, the light energy may not reach the inside of the composition, leaving the inside uncured. Furthermore, JP 2008-274119 A does not describe adhesion to adherends, and if peeling from the adherend occurs, the function as a sealant is lost.
- the inventors discovered a method for producing a curable resin composition that can produce a cured product that is highly resistant to coolants, and thus completed the present invention.
- the gist of the present invention is explained below.
- the present invention includes, for example, the following embodiments.
- the first embodiment of the present invention is a curable resin composition containing components (A) to (C).
- Component (A) a polymer whose main chain is a polymer of a monomer containing a (meth)acrylic monomer and has a hydrolyzable silyl group in the molecule;
- Component (B) an organic zinc catalyst; and
- the second embodiment of the present invention is the curable resin composition according to the first embodiment, in which the hydrolyzable silyl group of component (A) is a dialkoxysilyl group.
- the third embodiment of the present invention is a curable resin composition according to the first or second embodiment, further comprising a coupling agent other than a silane-based coupling agent having an epoxy group.
- the fourth embodiment of the present invention is the curable resin composition according to the third embodiment, which contains 1 to 20 parts by mass of the component (C) relative to 100 parts by mass of the component (A) and 5 to 25 parts by mass of a coupling agent other than a silane-based coupling agent having an epoxy group.
- the fifth embodiment of the present invention is a curable resin composition according to any one of the first to fourth embodiments, further comprising a filler.
- the sixth embodiment of the present invention is the curable resin composition according to the fifth embodiment, which contains 50 to 150 parts by mass of the filler per 100 parts by mass of the component (A).
- the seventh embodiment of the present invention is a curable resin composition according to any one of the first to sixth embodiments, further comprising a plasticizer.
- the eighth embodiment of the present invention is the curable resin composition according to the seventh embodiment, which contains 1 to 30 parts by mass of the plasticizer per 100 parts by mass of the component (A).
- the ninth embodiment of the present invention is a sealant containing the curable resin composition described in any one of the first to eighth embodiments.
- the tenth embodiment of the present invention is a cured product obtained by curing the curable resin composition described in any one of the first to eighth embodiments or the sealant described in the ninth embodiment.
- the range "X to Y” is used to mean that the numerical values (X and Y) are included as the lower and upper limits, and means “X or more and Y or less.” Unless otherwise specified, operations and measurements of physical properties are performed under room temperature (20°C or more and 25°C or less) and relative humidity of 40% RH or more and 50% RH or less. In this specification, "A and/or B” means that A and B are each included, as well as combinations of these.
- the term (meth)acrylic means both acrylic and methacrylic.
- (meth)acryloyl means both acryloyl and methacryloyl.
- One aspect of the present invention relates to a curable resin composition containing components (A) to (C).
- Component (A) a polymer whose main chain is a polymer of a monomer containing a (meth)acrylic monomer and has a hydrolyzable silyl group in the molecule;
- Component (B) an organic zinc catalyst; and
- a curable resin composition can be provided that produces a cured product that has high adhesion to at least one type of metal and high resistance to coolants.
- Component (A) is a polymer whose main chain is a polymer of a monomer containing a (meth)acrylic monomer and has a hydrolyzable silyl group in the molecule.
- Component (A) is preferably a polymer whose main chain is a polymer of a monomer whose main component is a (meth)acrylic monomer and has a hydrolyzable silyl group in the molecule, and more preferably a polymer whose main chain is a polymer of only (meth)acrylic monomer and has a hydrolyzable silyl group in the molecule.
- the (A) component is a polymer having a main skeleton of a partial structure made of a polymer of a monomer containing a (meth)acrylic monomer and having one or more hydrolyzable silyl groups in one molecule, preferably a (meth)acrylic polymer having a main skeleton of a (meth)acrylic monomer as the main component of the monomer and having one or more hydrolyzable silyl groups in one molecule (i.e., a polymer having a main skeleton of a partial structure made of a polymer of a monomer whose main component is a (meth)acrylic monomer and having one or more hydrolyzable silyl groups in one molecule), more preferably a polymer having a main skeleton of a partial structure made of a polymer of only a (meth)acrylic monomer and having one or more hydrolyzable silyl groups in one molecule.
- the (A) component may be one type alone, or two
- the (A) component has two or more hydrolyzable silyl groups in the molecule. That is, it is preferable that the (A) component has two or more hydrolyzable silyl groups in one molecule.
- the number of hydrolyzable silyl groups in the (A) component molecule is not particularly limited. It is preferable that the (A) component has one or two hydrolyzable silyl groups in the molecule, and it is particularly preferable that the (A) component has two hydrolyzable silyl groups in the molecule.
- the (A) component is a polymer whose main chain is a polymer of a monomer containing a (meth)acrylic monomer and has two hydrolyzable silyl groups in the molecule.
- the (A) component is a combination of a polymer whose main chain is a polymer of a monomer containing a (meth)acrylic monomer and has one hydrolyzable silyl group in the molecule, and a polymer whose main chain is a polymer of a monomer containing a (meth)acrylic monomer and has two hydrolyzable silyl groups in the molecule.
- Component (A) has a hydrolyzable silyl group, and the hydrolyzable silyl group may be present on the side chain and/or the end of the molecule, but from the viewpoint of rubber elasticity and flexibility, it is preferable that the hydrolyzable silyl group is present at least at the end of the main chain, and preferably at both ends of the main chain. As described later, in component (A), the main chain and the hydrolyzable silyl group may be bonded via a linking group.
- a hydrolyzable silyl group is a group that can crosslink by undergoing a condensation reaction to form a siloxane bond.
- a hydrolyzable silyl group is a functional group that has one to three hydrolyzable groups bonded to a silicon atom.
- hydrolyzable groups include alkoxy groups, alkenyloxy groups, acyloxy groups, amino groups, aminooxy groups, oxime groups, and amide groups.
- Examples of hydrolyzable silyl groups include alkoxysilyl groups, alkenyloxysilyl groups, acyloxysilyl groups, aminosilyl groups, aminooxysilyl groups, oximesilyl groups, and amidesilyl groups.
- the alkoxysilyl group refers to a hydrolyzable silyl group whose silicon atom is bonded to a hydrolyzable group that is an alkoxy group
- the alkenyloxysilyl group refers to a hydrolyzable silyl group whose silicon atom is bonded to a hydrolyzable group that is an alkenyloxy group
- the acyloxysilyl group refers to a hydrolyzable silyl group whose silicon atom is bonded to a hydrolyzable group that is an acyloxy group
- the aminosilyl group refers to a hydrolyzable silyl group whose silicon atom is bonded to a hydrolyzable group that is an amino group
- the aminooxysilyl group refers to a hydrolyzable silyl group whose silicon atom is bonded to a hydrolyzable group that is an aminooxy group
- the oximesilyl group refers to a hydrolyzable silyl group whose silicon
- the hydrolyzable silyl group preferably contains at least one selected from the group consisting of the hydrolyzable silyl groups exemplified above. Among them, the hydrolyzable silyl group is preferably an alkoxysilyl group because of ease of handling.
- the alkoxy group bonded to the silicon atom of the alkoxysilyl group is not particularly limited, but preferably includes a straight-chain or branched-chain alkoxy group having 1 to 20 carbon atoms, more preferably a straight-chain or branched-chain alkoxy group having 1 to 8 carbon atoms.
- Examples of the alkoxy group bonded to the silicon atom of the alkoxysilyl group include a methoxy group, an ethoxy group, and a propoxy group.
- the alkoxy group bonded to the silicon atom of the alkoxysilyl group may be a single type, or two or more types may be used in combination.
- the alkoxy group bonded to the silicon atom of the alkoxysilyl group contains at least one type selected from the group consisting of the functional groups exemplified above. Of these, it is particularly preferable that the alkoxy group bonded to the silicon atom of the alkoxysilyl group is a methoxy group. In addition, a group other than the alkoxy group may be bonded to the silicon atom of the alkoxysilyl group.
- the group other than the alkoxy group bonded to the silicon atom of the alkoxysilyl group is not particularly limited, but examples include a hydrogen atom, an alkyl group, an alkenyl group, and an arylalkyl group.
- the alkyl group is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, more preferably a linear or branched alkyl group having 1 to 8 carbon atoms, more preferably a methyl group, an ethyl group, a propyl group, or an isopropyl group, and particularly preferably a methyl group.
- the alkyl group bonded to the silicon atom of the alkoxysilyl group is not limited to these.
- the group other than the alkoxy group bonded to the silicon atom of the alkoxysilyl group may be one type alone or two or more types may be used in combination.
- the group other than the alkoxy group bonded to the silicon atom of the alkoxysilyl group preferably contains at least one type selected from the group consisting of the functional groups exemplified above.
- the group other than the alkoxy group bonded to the silicon atom of the alkoxysilyl group is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, more preferably a linear or branched alkyl group having 1 to 8 carbon atoms, even more preferably a methyl group, an ethyl group, a propyl group, or an isopropyl group, and particularly preferably a methyl group.
- alkoxysilyl groups are not particularly limited, but examples thereof include dialkoxysilyl groups (e.g., alkyldialkoxysilyl groups, etc.), trialkoxysilyl groups, etc., and more specifically, trimethoxysilyl groups, triethoxysilyl groups, triisopropoxysilyl groups, methyldimethoxysilyl groups (also known as dimethoxymethylsilyl groups), methyldiethoxysilyl groups (also known as diethoxymethylsilyl groups), etc.
- dialkoxysilyl groups are preferred, alkyldialkoxysilyl groups are more preferred, and dimethoxymethylsilyl groups are particularly preferred.
- the alkoxysilyl groups may be one type alone or two or more types may be used in combination.
- the alkoxysilyl groups preferably contain at least one type selected from the group consisting of the functional groups exemplified above.
- the hydrolyzable silyl group of component (A) is preferably a dialkoxysilyl group, more preferably an alkyldialkoxysilyl group, and particularly preferably a dimethoxymethylsilyl group.
- component (A) preferably has two dialkoxysilyl groups in the molecule, more preferably has two alkyldialkoxysilyl groups in the molecule, and even more preferably has two dimethoxymethylsilyl groups in the molecule.
- the main chain (main skeleton) and the hydrolyzable silyl group may be bonded directly or via a linking group.
- the (A) component may further have a linking group between the main chain and the hydrolyzable silyl group, or may not have a linking group between the hydrolyzable silyl group and the main chain.
- the linking group is not particularly limited, but examples thereof include divalent groups.
- the divalent linking group is not particularly limited, but examples thereof include alkylene groups, heteroalkylene groups, arylene groups, heteroarylene groups, ether groups, -S- groups, -NR- groups, carbonyl groups, sulfonyl groups; groups formed by selecting two or more groups from the group consisting of these groups and combining one or more of each of these selected groups; and the like.
- R is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.
- the (meth)acrylic monomer constituting the polymer of monomers containing the (meth)acrylic monomer that is the main skeleton (main chain) of component (A) is not particularly limited, and various (meth)acrylic monomers can be used.
- the (meth)acrylic monomer is a general term for monomers having an acrylic group (acryloyl group) (H 2 C ⁇ CH-C( ⁇ O)-) or a methacrylic group (methacryloyl group) (H 2 C ⁇ C(CH 3 )-C( ⁇ O)-).
- Examples of the (meth)acrylic monomer include (meth)acrylic acid, methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate, n-pentyl (meth)acrylate, n-hexyl (meth)acrylate, cyclohexyl (meth)acrylate, n-heptyl (meth)acrylate, n-octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, nonyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate, phenyl (meth)acrylate, toluyl (meth)acrylate, benzyl (meth
- acrylates include, but are not limited to, ethyl acrylate, stearyl (meth)acrylate, glycidyl (meth)acrylate, 2-aminoethyl (meth)acrylate, ⁇ -(methacryloyloxypropyl)trimethoxysilane, ethylene oxide adduct of (meth)acrylic acid, trifluoromethylmethyl (meth)acrylate, 2-trifluoromethylethyl (meth)acrylate, 2-perfluoroethylethyl (meth)acrylate, 2-perfluoroethyl-2-perfluorobutylethyl (meth)acrylate, 2-perfluoroethyl (meth)acrylate, perfluoromethyl (meth)acrylate, diperfluoromethylmethyl (meth)acrylate, 2-perfluoromethyl-2-perfluoroethylmethyl (meth)acrylate, 2-perfluorohexylethy
- a (meth)acrylic monomer can be selected and polymerized, it is preferable to select a (meth)acrylic monomer having a hydrocarbon group in a portion other than the (meth)acryloyl group.
- the (meth)acrylic monomer may be one type alone or two or more types in combination.
- the (meth)acrylic monomer preferably includes at least one type selected from the group consisting of the (meth)acrylic monomers exemplified above, and more preferably includes a (meth)acrylic monomer having a hydrocarbon group in a portion other than the (meth)acryloyl group.
- the (meth)acrylic monomer is particularly preferably a (meth)acrylic monomer having a hydrocarbon group in a portion other than the (meth)acryloyl group.
- the proportion of constitutional units derived from the (meth)acrylic monomer is preferably 50 mol % or more, more preferably 70 mol % or more, even more preferably 90 mol % or more, and particularly preferably 100 mol % (upper limit 100 mol %), relative to the total molar amount of constitutional units constituting the polymer of a monomer containing a (meth)acrylic monomer.
- a polymer of a monomer whose main component is a (meth)acrylic monomer the proportion of constitutional units derived from the (meth)acrylic monomer is 50 mol % or more relative to the total molar amount of constitutional units constituting the polymer.
- the monomer for constituting the polymer of the monomer containing the (meth)acrylic monomer in the main backbone (main chain) may further contain other monomers copolymerizable with the (meth)acrylic monomer. That is, the polymer of the monomer containing the (meth)acrylic monomer in the main backbone (main chain) may further contain a structural unit derived from another monomer copolymerizable with the (meth)acrylic monomer.
- the other monomers copolymerizable with the (meth)acrylic monomer are not particularly limited, but examples thereof include monomers containing an amide group, monomers containing an amino group, acrylonitrile, styrene, ⁇ -methylstyrene, alkyl vinyl ether, vinyl chloride, vinyl acetate, vinyl propionate, and ethylene.
- the monomers containing an amide group are not particularly limited, but examples thereof include (meth)acrylamide and N-methylol (meth)acrylamide.
- the monomers containing an amino group are not particularly limited, but examples thereof include aminoethyl vinyl ether.
- the number average molecular weight (Mn) of the polymer used as component (A) is not particularly limited, but is preferably 500 or more, more preferably 3000 or more.
- the number average molecular weight (Mn) of the polymer used as component (A) is not particularly limited, but is preferably 100,000 or less, more preferably 50,000 or less. If the number average molecular weight is 500 or more, the elasticity of the cured product of the composition is easily expressed, and if the number average molecular weight is 100,000 or less, the viscosity is appropriate and stringiness can be suppressed when the composition is applied.
- the number average molecular weight (Mn) of the polymer used as component (A) is not particularly limited, but is preferably 500 or more and 100,000 or less, more preferably 3000 or more and 50,000 or less.
- the number average molecular weight of the polymer used as component (A) can be measured by gel permeation chromatography (GPC) using polystyrene as a standard substance.
- the viscosity of the polymer used as component (A) affects the viscosity of the curable resin composition, so in consideration of the coatability, it is preferably 100 to 1000 Pa ⁇ s at 23 to 25°C. That is, the viscosity of the polymer used as component (A) is preferably 100 Pa ⁇ s to 1000 Pa ⁇ s at 23°C to 25°C.
- the viscosity of the polymer used as component (A) is, for example, preferably 100 Pa ⁇ s to 1000 Pa ⁇ s at 23°C, more preferably 200 Pa ⁇ s to 600 Pa ⁇ s at 23°C, and even more preferably 250 Pa ⁇ s to 500 Pa ⁇ s at 23°C.
- the viscosity of the polymer used as component (A) can be measured by an E-type viscometer according to JIS Z8803:2011 Viscosity Measurement Method.
- Component (A) can be obtained by various polymerization methods, and the method is not particularly limited, but radical polymerization is preferred from the viewpoint of the versatility of the monomer and ease of reaction control.
- radical polymerizations controlled radical polymerization is preferred, living radical polymerization is more preferred, and atom transfer radical polymerization is particularly preferred.
- a method for introducing a hydrolyzable silyl group into a polymer of monomers containing a (meth)acrylic monomer as the main chain can be a method already known in the art, and for example, the method described in JP-A-09-272714 (US Pat. No. 5,986,014 specification) or JP-A-11-043512 can be used.
- Component (A) may be a commercially available product and/or a synthetic product. Specific examples of component (A) include, but are not limited to, XMAP series SA110S, SA100S, SA120S, and OR110S manufactured by Kaneka Corporation.
- Component (B) is an organic zinc catalyst.
- Component (B) may be any catalyst capable of causing a condensation reaction of a hydrolyzable silyl group.
- Component (B) may be a single type, or two or more types may be used in combination.
- the curable resin composition may further contain a component that activates the catalyst together with component (B).
- the organic zinc catalyst is not particularly limited.
- Examples of the organic zinc catalyst include organic zinc complexes.
- Specific examples of organic zinc complexes include zinc acrylate, zinc acetate, zinc citrate, zinc salicylate, zinc oxalate, zinc adipate, zinc carbamate, zinc phthalocyanine, zinc thiolate, zinc stearate, zinc naphthenate, zinc decanoate, zinc butyrate, zinc neodecanoate, zinc isobutyrate, zinc benzoate, zinc octylate, zinc 2-ethylhexanoate, zinc hexacyanocobaltate complex, and 1-methylimidazole-bis(2-hexanoate) zinc complex, but are not limited to these.
- component (B) contains at least one selected from the group consisting of the organic zinc complexes exemplified above.
- Component (B) may be a commercially available product and/or a synthetic product.
- Examples of commercial products of component (B) include the K-KAT series manufactured by King Industries, such as 670, XK-648, XK-635, XK-614, and XK-661, but component (B) is not limited to these.
- the amount of component (B) added is not particularly limited. It is preferable to add 0.01 to 10 parts by mass (0.01 parts by mass or more and 10 parts by mass or less) of component (B) per 100 parts by mass of component (A). It is more preferable to add 0.01 parts by mass or more and 7 parts by mass or less of component (B) per 100 parts by mass of component (A), it is even more preferable to add 0.05 parts by mass or more and 7 parts by mass or less of component (B) per 100 parts by mass of component (A), and it is particularly preferable to add 0.1 parts by mass or more and 7 parts by mass or less of component (B) per 100 parts by mass of component (A).
- the content of the (B) component is not particularly limited, but is preferably 0.01 to 10 parts by mass per 100 parts by mass of the (A) component, more preferably 0.01 to 7 parts by mass per 100 parts by mass of the (A) component, even more preferably 0.05 to 7 parts by mass per 100 parts by mass of the (A) component, and particularly preferably 0.1 to 7 parts by mass per 100 parts by mass of the (A) component.
- the amount of the (B) component is 0.01 parts by mass or more per 100 parts by mass of the (A) component, the curability is improved, and when the amount of the (B) component is 10 parts by mass or less per 100 parts by mass of the (A) component, the storage stability is maintained.
- the amount of the (A) component described above represents the total amount of the two or more (A) components.
- the amount of the (B) component described above represents the total amount of the two or more (B) components.
- Component (C) is a silane coupling agent having an epoxy group. However, component (C) does not include component (A). In other words, component (C) is a polymer of a monomer whose main chain contains a (meth)acrylic monomer, and does not include a polymer having a hydrolyzable silyl group in the molecule.
- a silane coupling agent (also referred to as a "silane coupling agent" in this specification) is a compound having one hydrolyzable silyl group in the molecule.
- component (C) preferably contains one epoxy group in the molecule.
- component (A) By adding components (B) and (C) to component (A), it is possible to improve the resistance to coolant in the cured product of the curable resin composition while maintaining the storage stability of the curable resin composition before curing.
- Component (C) may be used alone or in combination of two or more types.
- the hydrolyzable silyl group of the (C) component is described in the same manner as the hydrolyzable silyl group of the (A) component.
- the hydrolyzable silyl group of the (C) component is not particularly limited, but is preferably an alkoxysilyl group.
- the alkoxy group bonded to the silicon atom of the alkoxysilyl group is not particularly limited, but is preferably a linear or branched alkoxy group having 1 to 20 carbon atoms, more preferably a linear or branched alkoxy group having 1 to 8 carbon atoms.
- Examples of the alkoxy group bonded to the silicon atom of the alkoxysilyl group include a methoxy group, an ethoxy group, and a propoxy group.
- the alkoxy group bonded to the silicon atom of the alkoxysilyl group may be one type alone, or two or more types may be used in combination.
- the alkoxy group bonded to the silicon atom of the alkoxysilyl group preferably contains at least one type selected from the group consisting of the functional groups exemplified above.
- the alkoxy group bonded to the silicon atom of the alkoxysilyl group is preferably a methoxy group or an ethoxy group, and is particularly preferably a methoxy group.
- the silicon atom of the alkoxysilyl group may have a group other than an alkoxy group bonded to it.
- groups other than an alkoxy group bonded to the silicon atom of the alkoxysilyl group include a hydrogen atom, an alkyl group, an alkenyl group, and an arylalkyl group.
- the alkyl group is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, more preferably a linear or branched alkyl group having 1 to 8 carbon atoms, and further preferably a methyl group, an ethyl group, a propyl group, or an isopropyl group, and particularly preferably a methyl group.
- the alkyl group bonded to the silicon atom of the alkoxysilyl group is not limited to these.
- the group other than an alkoxy group bonded to the silicon atom of the alkoxysilyl group may be one type alone, or two or more types may be used in combination.
- the group other than an alkoxy group bonded to the silicon atom of the alkoxysilyl group preferably contains at least one type selected from the group consisting of the functional groups exemplified above.
- the group other than the alkoxy group bonded to the silicon atom of the alkoxysilyl group is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, more preferably a linear or branched alkyl group having 1 to 8 carbon atoms, even more preferably a methyl group, an ethyl group, a propyl group, or an isopropyl group, and particularly preferably a methyl group.
- the alkoxysilyl group is not particularly limited, and examples thereof include dialkoxysilyl groups (e.g., alkyldialkoxysilyl groups, etc.), trialkoxysilyl groups, and the like, and more specifically, trimethoxysilyl groups, triethoxysilyl groups, triisopropoxysilyl groups, methyldimethoxysilyl groups (also known as dimethoxymethylsilyl groups), methyldiethoxysilyl groups (also known as diethoxymethylsilyl groups), and the like.
- dialkoxysilyl groups e.g., alkyldialkoxysilyl groups, etc.
- trialkoxysilyl groups e.g., alkyldialkoxysilyl groups, etc.
- trimethoxysilyl groups trimethoxysilyl groups
- triethoxysilyl groups triisopropoxysilyl groups
- methyldimethoxysilyl groups also known as dimethoxymethylsilyl
- the alkoxysilyl group is preferably a group selected from the group consisting of the groups exemplified above, preferably a trialkoxysilyl group (e.g., a trimethoxysilyl group, etc.) or a dialkoxysilyl group, more preferably a trialkoxysilyl group or an alkyldialkoxysilyl group (e.g., a methyldiethoxysilyl group, etc.), even more preferably a trialkoxysilyl group, and particularly preferably a trimethoxysilyl group.
- a trialkoxysilyl group e.g., a trimethoxysilyl group, etc.
- dialkoxysilyl group more preferably a trialkoxysilyl group or an alkyldialkoxysilyl group (e.g., a methyldiethoxysilyl group, etc.)
- even more preferably a trialkoxysilyl group and particularly preferably a trimeth
- component (C) examples include, but are not limited to, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, and 3-glycidoxypropyltriethoxysilane.
- Component (C) preferably contains at least one compound selected from the group of compounds exemplified above.
- component (C) is more preferably at least one compound selected from the group consisting of 3-glycidoxypropyltrimethoxysilane and 3-glycidoxypropylmethyldiethoxysilane, and even more preferably 3-glycidoxypropyltrimethoxysilane.
- Component (C) may be a commercially available product and/or a synthetic product.
- Commercially available products of component (C) include, but are not limited to, KBM-303, KBM-402, KBM-403, KBE-402, and KBE-403 manufactured by Shin-Etsu Chemical Co., Ltd.
- the amount of the (C) component added is not particularly limited. It is preferable to add 1 to 20 parts by mass (1 part or more and 20 parts or less by mass) of the (C) component to 100 parts by mass of the (A) component. It is more preferable to add 1 to 10 parts by mass of the (C) component to 100 parts by mass of the (A) component, and it is even more preferable to add 1 to 8 parts by mass of the (C) component to 100 parts by mass of the (A) component. It is even more preferable to add 1 to 5 parts by mass (1 to 5 parts by mass) of the (C) component to 100 parts by mass of the (A) component.
- the content of the (C) component is not particularly limited, but is preferably 1 part by mass or more and 20 parts by mass or less, more preferably 1 part by mass or more and 10 parts by mass or less, and even more preferably 1 part by mass or more and 8 parts by mass or less, more preferably 1 part by mass or more and 5 parts by mass or less, even more preferably 1 part by mass or more and 4 parts by mass or less, and particularly preferably 1 part by mass or more and 3 parts by mass or less, per 100 parts by mass of the (A) component.
- the amount of the (C) component is 1 part by mass or more per 100 parts by mass of the (A) component, the toughness is expressed in the cured product, and the tensile shear adhesive strength is improved.
- the amount of the (C) component is 20 parts by mass or less per 100 parts by mass of the (A) component, the hardness can be reduced.
- the amount of the (A) component described above represents the total amount of the two or more (A) components.
- the amount of the (C) component described above represents the total amount of the two or more (C) components.
- the (C) component in combination with a coupling agent other than the (C) component (i.e., a coupling agent other than a silane-based coupling agent having an epoxy group).
- a coupling agent other than the (C) component i.e., a coupling agent other than a silane-based coupling agent having an epoxy group
- the amount of the coupling agent other than the silane-based coupling agent having an epoxy group is not particularly limited. It is preferable to add 5 to 45 parts by mass of the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group in total to 100 parts by mass of the (A) component.
- the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group in total it is more preferable to add 5 to 25 parts by mass (5 to 25 parts by mass) of the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group in total to 100 parts by mass of the (A) component.
- the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group may be added in a total amount of 6 parts by mass or more and 25 parts by mass or less to 100 parts by mass of the (A) component.
- the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group in a total amount of 6 parts by mass or more and 20 parts by mass or less to 100 parts by mass of the (A) component. It is more preferable to add the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group in a total amount of 6 parts by mass or more and 16 parts by mass or less to 100 parts by mass of the (A) component. It is more preferable to add the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group in a total amount of 6 parts by mass or more and 13 parts by mass or less to 100 parts by mass of the (A) component.
- the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group it is more preferable to add the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group in a total amount of 6 parts by mass or more and 10 parts by mass or less to 100 parts by mass of the (A) component. It is particularly preferable to add 6 parts by mass or more and 9 parts by mass or less of the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group to 100 parts by mass of the (A) component.
- the total content of the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group is not particularly limited.
- the total content of the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group is preferably 5 parts by mass or more and 45 parts by mass or less, more preferably 5 parts by mass or more and 25 parts by mass or less, to 100 parts by mass of the (A) component.
- the total content of the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group may be 6 parts by mass or more and 45 parts by mass or less, to 100 parts by mass of the (A) component, or may be 6 parts by mass or more and 25 parts by mass or less, to 100 parts by mass of the (A) component.
- the total content of the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group is more preferably 6 parts by mass or more and 20 parts by mass or less, more preferably 6 parts by mass or more and 16 parts by mass or less, more preferably 6 parts by mass or more and 13 parts by mass or less, more preferably 6 parts by mass or more and 10 parts by mass or less, and particularly preferably 6 parts by mass or more and 9 parts by mass or less, relative to 100 parts by mass of the (A) component.
- the curable resin composition according to one embodiment may, for example, contain 1 part by mass or more and 20 parts by mass or less of the (C) component relative to 100 parts by mass of the (A) component, and may contain 5 parts by mass or more and 25 parts by mass or less of the coupling agent other than the silane-based coupling agent having an epoxy group.
- the total amount of the (C) component and the coupling agent other than the silane-based coupling agent having an epoxy group is 5 parts by mass or more relative to 100 parts by mass of the (A) component, the toughness of the cured product is more expressed and the tensile shear adhesive strength is improved.
- the storage stability can be maintained well and the hardness of the cured product can be reduced.
- the amount of the (A) component above represents the total amount of the two or more (A) components.
- the amount of the (C) component above represents the total amount of the two or more (C) components.
- the amount of the coupling agent other than the silane-based coupling agent having an epoxy group above represents the total amount of the two or more coupling agents other than the silane-based coupling agent having an epoxy group.
- the curable resin composition may further contain additional components.
- additional components are not particularly limited, and examples thereof include coupling agents other than silane-based coupling agents having epoxy groups (for example, silane-based coupling agents other than component (C), i.e., silane-based coupling agents not having epoxy groups), fillers (for example, inorganic fillers, organic fillers, etc.), antioxidants, antiaging agents, plasticizers, physical property adjusters, color powders, etc.
- the additional components may be used alone or in combination of two or more types.
- the curable resin composition according to one embodiment is preferably further added with a coupling agent other than a silane-based coupling agent having an epoxy group, and more preferably further added with a silane-based coupling agent other than the component (C) (i.e., a silane-based coupling agent not having an epoxy group).
- the curable resin composition according to one embodiment is preferably further added with a coupling agent other than a silane-based coupling agent having an epoxy group, and more preferably further added with a silane-based coupling agent not having an epoxy group.
- the coupling agent other than a silane-based coupling agent having an epoxy group and the silane-based coupling agent not having an epoxy group are each excluding the above-mentioned component (A).
- the coupling agent other than a silane-based coupling agent having an epoxy group and the silane-based coupling agent not having an epoxy group are each a polymer of a monomer containing a (meth)acrylic monomer in the main chain, and each excluding a polymer having a hydrolyzable silyl group in the molecule.
- the coupling agent other than the silane-based coupling agent having an epoxy group may be used alone, or two or more types may be used in combination.
- the silane-based coupling agent not having an epoxy group may be used alone, or two or more types may be used in combination.
- the silane-based coupling agent without an epoxy group has an alkyl group and/or a phenyl group in the molecule and has no reactive functional groups other than hydrolyzable silyl groups in the molecule.
- reactive functional groups other than hydrolyzable silyl groups include epoxy groups, (meth)acrylic groups, and amino groups.
- the silane-based coupling agent without an epoxy group has an alkyl group in the molecule and has no reactive functional groups other than hydrolyzable silyl groups in the molecule.
- the silane-based coupling agent without an epoxy group contains a silane-based coupling agent that has an alkyl group and/or a phenyl group in the molecule and has no reactive functional groups other than hydrolyzable silyl groups in the molecule. It is more preferable that the silane-based coupling agent without an epoxy group is a silane-based coupling agent that has an alkyl group and/or a phenyl group in the molecule and has no reactive functional groups other than hydrolyzable silyl groups in the molecule, and it is even more preferable that the silane-based coupling agent has an alkyl group in the molecule and has no reactive functional groups other than hydrolyzable silyl groups in the molecule.
- silane-based coupling agents having an alkyl group and/or a phenyl group in the molecule and having no reactive functional groups other than hydrolyzable silyl groups in the molecule include, but are not limited to, methyltrimethoxysilane, methyltriethoxysilane, n-propyltriethoxysilane, diphenyldimethoxysilane, etc.
- silane-based coupling agents having no epoxy groups include, but are not limited to, vinyltrimethoxysilane, etc. in addition to the above. Silane-based coupling agents having no epoxy groups may be used alone or in combination of two or more.
- the silane-based coupling agent having no epoxy groups contains at least one selected from the group consisting of the compounds exemplified above. It is more preferable that the silane-based coupling agent having no epoxy groups is at least one selected from the group consisting of methyltrimethoxysilane, methyltriethoxysilane, n-propyltriethoxysilane, vinyltrimethoxysilane, and diphenyldimethoxysilane, and it is even more preferable that the silane-based coupling agent having no epoxy groups is at least one selected from the group consisting of methyltrimethoxysilane and diphenyldimethoxysilane, and it is particularly ... is methyltrimethoxysilane.
- the silane coupling agent without an epoxy group may be a commercially available product and/or a synthetic product. There are no particular limitations on the commercially available silane coupling agent without an epoxy group. Examples of commercially available silane coupling agents without an epoxy group include KBM-13 and KBM-202SS manufactured by Shin-Etsu Chemical Co., Ltd.
- the curable resin composition according to one embodiment preferably further contains a filler, and more preferably further contains an inorganic filler.
- the curable resin composition according to one embodiment preferably further contains a filler, and more preferably further contains an inorganic filler. The purpose of this is to adjust viscosity and improve toughness.
- the filler may be used alone or in combination of two or more types.
- the inorganic filler may be used alone or in combination of two or more types.
- the filler is preferably an inorganic filler.
- Inorganic fillers include, but are not limited to, silica powder (e.g., fumed silica powder), calcium carbonate powder (e.g., heavy calcium carbonate powder, light calcium carbonate powder), alumina powder, talc powder, etc. These inorganic fillers may be used alone or in combination of two or more. It is preferable that the inorganic filler contains at least one type selected from the group consisting of the inorganic fillers exemplified above.
- the inorganic filler is at least one type selected from the group consisting of silica powder, calcium carbonate powder, alumina powder, and talc powder, even more preferable that the inorganic filler is at least one type selected from the group consisting of silica powder and calcium carbonate powder, even more preferable that the inorganic filler is at least one type selected from the group consisting of fumed silica powder and calcium carbonate powder, and particularly preferable that the inorganic filler is fumed silica powder and calcium carbonate powder.
- the powder used as the filler may or may not be surface-treated.
- the powder used as the inorganic filler may or may not be surface-treated.
- the use of a surface-treated powder improves the ease of kneading into the composition, so it is more preferable to use a surface-treated powder.
- the filler is preferably a powder that has been surface-treated with a surface treatment agent.
- the inorganic filler is preferably a powder that has been surface-treated with a surface treatment agent.
- the surface treatment agent is not particularly limited, but examples include fatty acids such as lauric acid, myristic acid, palmitic acid, and stearic acid; silane coupling agents (silane coupling agents); silicone compounds; titanium coupling agents; or aluminum coupling agents.
- the surface treatment agent may be used alone or in combination of two or more types. It is preferable that the surface treatment agent contains at least one selected from the group consisting of the surface treatment agents exemplified above.
- the surface treatment agent is preferably at least one selected from the group consisting of fatty acids, silane coupling agents, silicone compounds, titanium coupling agents, and aluminum coupling agents, more preferably at least one selected from the group consisting of fatty acids, silane coupling agents, and silicone compounds, and particularly preferably fatty acids or dimethyl silicone (also known as polydimethylsiloxane, dimethylpolysiloxane).
- the average particle size of the filler is not particularly limited.
- the average particle size of the filler is preferably 0.001 ⁇ m or more and 50 ⁇ m or less, and more preferably 0.01 ⁇ m or more and 10 ⁇ m or less.
- the average particle size of the filler refers to the average particle size of each filler.
- the average particle size of the inorganic filler is not particularly limited. Considering nozzle clogging during dispense application, the average particle size of the inorganic filler is preferably 0.001 to 50 ⁇ m (0.001 ⁇ m or more and 50 ⁇ m or less), and more preferably 0.01 ⁇ m or more and 10 ⁇ m or less.
- the average particle size of the inorganic filler refers to the average particle size of each inorganic filler.
- Methods for measuring the average particle size of the filler and the average particle size of the inorganic filler include observation with an electron microscope and measurement with a laser diffraction/scattering measuring device using a dynamic light scattering method.
- the average particle size refers to the 50% average particle size (median diameter, D50) measured by a laser diffraction/scattering measuring device in the case of a ⁇ m order, and refers to the average particle size which is the arithmetic mean of particle sizes of particles confirmed by observation with an electron microscope in the case of a nm order.
- the filler is preferably calcium carbonate powder having a 50% average particle size of 1 ⁇ m to 50 ⁇ m as measured by a laser diffraction/scattering measuring device and a fumed silica powder having an average particle size of 1 nm to 100 nm as the arithmetic average of the particle sizes of the particles as confirmed by observation with an electron microscope, more preferably calcium carbonate powder having a 50% average particle size of 1 ⁇ m to 10 ⁇ m as measured by a laser diffraction/scattering measuring device and a fumed silica powder having an average particle size of 1 nm to 100 nm as the arithmetic average of the particle sizes of the particles as confirmed by observation with an electron microscope, and even more preferably hydrophobic calcium carbonate powder having a 50% average particle size of 1 ⁇ m to 10 ⁇ m as measured by a laser diffraction/scattering measuring device and a hydrophobic fumed silica powder having an average particle size of 1 nm to 100 nm
- Fillers may be commercially available and/or synthetic.
- the amount of filler added is not particularly limited. It is preferable that 50 parts by mass or more and 150 parts by mass or less of the filler is added to 100 parts by mass of the (A) component. It is more preferable that 80 parts by mass or more and 150 parts by mass or less of the filler is added to 100 parts by mass of the (A) component. It is even more preferable that 105 parts by mass or more and 150 parts by mass or less of the filler is added to 100 parts by mass of the (A) component. It is even more preferable that 105 parts by mass or more and 120 parts by mass or less of the filler is added to 100 parts by mass of the (A) component.
- 105 parts by mass or more and 110 parts by mass or less of the filler is added to 100 parts by mass of the (A) component. It may be possible to add 50 parts by mass or more and 100 parts by mass or less of the filler to 100 parts by mass of the (A) component, it may be possible to add 50 parts by mass or more and 95 parts by mass or less of the filler to 100 parts by mass of the (A) component, and it may be possible to add 50 parts by mass or more and 90 parts by mass or less of the filler to 100 parts by mass of the (A) component.
- the content of the filler is not particularly limited, but is preferably 50 parts by mass or more and 150 parts by mass or less, more preferably 80 parts by mass or more and 150 parts by mass or less, more preferably 105 parts by mass or more and 150 parts by mass or less, even more preferably 105 parts by mass or more and 120 parts by mass or less, and particularly preferably 105 parts by mass or more and 110 parts by mass or less, relative to 100 parts by mass of the (A) component.
- the content of the filler may be 50 parts by mass or more and 100 parts by mass or less, 50 parts by mass or more and 95 parts by mass or less, or 50 parts by mass or more and 90 parts by mass or less, relative to 100 parts by mass of the (A) component.
- the curable resin composition according to one embodiment preferably contains 50 parts by mass or more and 150 parts by mass or less of the filler relative to 100 parts by mass of the (A) component.
- the amount of the filler is 50 parts by mass or more relative to 100 parts by mass of the (A) component, the mechanical strength and/or elongation of the cured product tends to be improved.
- the amount of the filler is 150 parts by mass or less per 100 parts by mass of the (A) component, the storage stability is further improved.
- the amount of the (A) component above represents the total amount of the two or more (A) components.
- the amount of the filler above represents the total amount of the two or more fillers.
- the amount of inorganic filler added is not particularly limited. It is preferable that 50 to 150 parts by mass (50 parts by mass or more and 150 parts by mass or less) of inorganic filler is added per 100 parts by mass of component (A). It is more preferable that 80 parts by mass or more and 150 parts by mass or less of inorganic filler is added per 100 parts by mass of component (A). It is even more preferable that 105 parts by mass or more and 150 parts by mass or less of inorganic filler is added per 100 parts by mass of component (A). It is even more preferable that 105 parts by mass or more and 120 parts by mass or less of inorganic filler is added per 100 parts by mass of component (A).
- inorganic filler is added per 100 parts by mass of component (A).
- the inorganic filler may be added in an amount of 50 parts by mass or more and 100 parts by mass or less per 100 parts by mass of the (A) component, and the inorganic filler may be added in an amount of 50 parts by mass or more and 95 parts by mass or less per 100 parts by mass of the (A) component, and the inorganic filler may be added in an amount of 50 parts by mass or more and 90 parts by mass or less per 100 parts by mass of the (A) component.
- the content of the inorganic filler is not particularly limited, but is preferably 50 parts by mass or more and 150 parts by mass or less per 100 parts by mass of the (A) component, more preferably 80 parts by mass or more and 150 parts by mass or less, even more preferably 105 parts by mass or more and 150 parts by mass or less, even more preferably 105 parts by mass or more and 120 parts by mass or less, and particularly preferably 105 parts by mass or more and 110 parts by mass or less.
- the content of the inorganic filler may be 50 parts by mass or more and 100 parts by mass or less, 50 parts by mass or more and 95 parts by mass or less, or 50 parts by mass or more and 90 parts by mass or less per 100 parts by mass of the (A) component.
- the curable resin composition according to one embodiment preferably contains 50 to 150 parts by mass of inorganic filler per 100 parts by mass of the (A) component.
- the amount of inorganic filler is 50 parts by mass or more per 100 parts by mass of the (A) component, the mechanical strength and/or elongation of the cured product tends to be improved.
- the amount of inorganic filler is 150 parts by mass or less per 100 parts by mass of the (A) component, the storage stability is further improved.
- the amount of the (A) component described above represents the total amount of the two or more (A) components.
- the amount of the inorganic filler described above represents the total amount of the two or more inorganic fillers.
- the calcium carbonate powder is not particularly limited.
- calcium carbonate powder treated with a fatty acid for the purpose of improving the ease of kneading into the composition can be used.
- the curable resin composition according to one embodiment preferably contains calcium carbonate powder treated with a fatty acid (calcium carbonate powder surface-treated with a fatty acid).
- the inorganic filler preferably contains calcium carbonate powder surface-treated with a fatty acid.
- the calcium carbonate powder is preferably hydrophobic calcium carbonate powder.
- the inorganic filler preferably contains hydrophobic calcium carbonate powder.
- the hydrophobic calcium carbonate powder preferably includes calcium carbonate powder surface-treated with a fatty acid.
- the fatty acid used for surface treatment of the calcium carbonate powder is not particularly limited, but examples thereof include lauric acid, myristic acid, palmitic acid, and stearic acid.
- Specific commercial products (commercial products) of calcium carbonate powder include, but are not limited to, CALFAINE Series 200M from Maruo Calcium Co., Ltd., Softon 1800 from Shiraishi Calcium Co., Ltd., and NCC#110 from Nitto Funka Kogyo Co., Ltd.
- One type of calcium carbonate powder may be used alone, or two or more types may be used in combination.
- the fumed silica powder is not particularly limited.
- the fumed silica powder include hydrophilic types (hydrophilic fumed silica powder) in which silanol remains on the untreated surface (surface of untreated fumed silica powder), and hydrophobic types (hydrophobic fumed silica powder) in which silanol (silanol on the surface of the fumed silica powder) is treated with a Si-containing compound (e.g., dimethyldichlorosilane, dimethyl silicone (also known as polydimethylsiloxane, dimethylpolysiloxane), etc.) to hydrophobize the silica surface (surface of the fumed silica powder), but are not limited thereto.
- a Si-containing compound e.g., dimethyldichlorosilane, dimethyl silicone (also known as polydimethylsiloxane, dimethylpolysiloxane), etc.
- the fumed silica powder is preferably hydrophobic fumed silica powder.
- the inorganic filler preferably contains hydrophobic fumed silica powder.
- the hydrophobic fumed silica powder is preferably fumed silica powder surface-treated with a Si-containing compound, more preferably fumed silica powder surface-treated with a silicone compound, and even more preferably fumed silica powder surface-treated with dimethyl silicone.
- Specific commercial products (commercially available products) of hydrophilic type fumed silica powder (hydrophilic fumed silica powder) are not particularly limited, but examples include the Aerosil (English spelling: AEROSIL) series 90, 130, 150, 200, 255, 300, and 380 manufactured by Nippon Aerosil Co., Ltd.
- hydrophobic type fumed silica powder hydrophobic fumed silica powder
- Aerosil English notation: AEROSIL
- R972 (dimethyldichlorosilane treatment), R974 (dimethyldichlorosilane added), R104 (octamethylcyclotetrasiloxane treatment), R106 (octamethylcyclotetrasiloxane treatment), R202 (polydimethylsiloxane treatment), RY200 (polydimethylsiloxane treatment), R805 (octylsilane treatment), R812 (hexamethyldisilazane treatment), R816 (hexadecylsilane treatment), and R711 (methacrylsilane treatment).
- Other specific commercial products are not particularly limited, but include, for example, the Cabosil series, which is fumed silica manufactured by Cabot Corporation. Fumed silica powder may be used alone or in combination of two or more types.
- the curable resin composition preferably contains hydrophobic calcium carbonate powder and hydrophobic fumed silica powder.
- the inorganic filler preferably contains hydrophobic calcium carbonate powder and hydrophobic fumed silica powder.
- the hydrophobic calcium carbonate powder is calcium carbonate powder surface-treated with a fatty acid
- the hydrophobic fumed silica powder is fumed silica powder surface-treated with a Si-containing compound.
- the hydrophobic calcium carbonate powder is calcium carbonate powder surface-treated with a fatty acid
- the hydrophobic fumed silica powder is fumed silica powder surface-treated with a silicone compound. It is even more preferable that the hydrophobic calcium carbonate is calcium carbonate powder surface-treated with a fatty acid, and the hydrophobic fumed silica powder is fumed silica powder surface-treated with a dimethyl silicone.
- the mass ratio of the hydrophobic calcium carbonate powder and the hydrophobic fumed silica powder added is not particularly limited.
- the content ratio of the hydrophobic calcium carbonate powder and the hydrophobic fumed silica powder is not particularly limited.
- the amount of the hydrophobic calcium carbonate powder mentioned above represents the total amount of the two or more kinds of hydrophobic calcium carbonate powders.
- the amount of the hydrophobic fumed silica powder mentioned above represents the total amount of the two or more kinds of hydrophobic fumed silica powders.
- An antioxidant may be further added to the curable resin composition according to one embodiment.
- the curable resin composition according to one embodiment may further contain an antioxidant, or may not contain an antioxidant, but preferably contains an antioxidant. The purpose of this is to prevent deterioration of the cured product due to the external environment.
- the antioxidant may be used alone or in combination of two or more types.
- the antioxidant is preferably liquid at 25°C. Examples of the antioxidant include phenol-based antioxidants, thioether-based antioxidants, phosphorus-based antioxidants, and nitroxide-based antioxidants, but the type of antioxidant is not limited to these.
- As the antioxidant a thioether-based antioxidant is preferable in consideration of resistance to coolants. These antioxidants may be used alone or in combination of two or more types.
- the antioxidant preferably includes at least one selected from the group consisting of the antioxidants exemplified above.
- the antioxidant is preferably a thioether-based antioxidant, more preferably a thioether-based antioxidant that is liquid at 25°C.
- the antioxidant may be a commercially available product and/or a synthetic product. There are no particular limitations on the commercially available antioxidant. Examples of commercially available antioxidants include Adeka STAB AO-26 manufactured by ADEKA CORPORATION.
- the amount of antioxidant added is not particularly limited. It is preferable that 0.1 to 5.0 parts by mass (0.1 parts by mass to 5.0 parts by mass) of antioxidant is added per 100 parts by mass of component (A). It is more preferable that 0.5 parts by mass to 4.0 parts by mass of antioxidant is added per 100 parts by mass of component (A). It is even more preferable that 1.0 parts by mass to 3.0 parts by mass of antioxidant is added per 100 parts by mass of component (A).
- the content of antioxidant is not particularly limited, but is preferably 0.1 parts by mass to 5.0 parts by mass, more preferably 0.5 parts by mass to 4.0 parts by mass, and even more preferably 1.0 parts by mass to 3.0 parts by mass.
- the amount of (A) component mentioned above represents the total amount of two or more types of (A) components.
- the amount of antioxidant mentioned above represents the total amount of two or more types of antioxidants.
- the viscosity of the antioxidant at 25°C is not particularly limited, but is preferably 100 mPa ⁇ s or more and 10,000 mPa ⁇ s or less, more preferably 100 mPa ⁇ s or more and 7,000 mPa ⁇ s or less, and even more preferably 100 mPa ⁇ s or more and 5,000 mPa ⁇ s or less.
- a plasticizer may be further added to the curable resin composition according to one embodiment.
- the curable resin composition according to one embodiment may further contain a plasticizer or may not contain a plasticizer, but it is preferable that it further contains a plasticizer. The purpose of this is to impart softness and flexibility to the cured product.
- One type of plasticizer may be used alone, or two or more types may be used in combination.
- the plasticizer may be liquid at 25°C.
- the plasticizer preferably includes a plasticizer that is liquid at 25°C. There are no particular restrictions on the plasticizer, as long as it is compatible with component (A).
- plasticizer examples include propylene carbonate, DOS (di-2-ethylhexyl sebacate), DOP (dioctyl phthalate), DINP (diisononyl phthalate), DIDP (diisodecyl phthalate), DBP (dibutyl phthalate), DMS (dimethyl sebacate), DOA (dioctyl adipate), DINA (diisononyl adipate), TCP (tricresyl phosphate), and (meth)acrylic polymers, but the plasticizer is not limited to these. These may be used alone or in combination of two or more.
- the plasticizer preferably contains at least one compound selected from the group consisting of the compounds exemplified above.
- the plasticizer is more preferably at least one compound selected from the group consisting of propylene carbonate, DOS (di-2-ethylhexyl sebacate), DOP (dioctyl phthalate), DINP (diisononyl phthalate), DIDP (diisodecyl phthalate), DBP (dibutyl phthalate), DMS (dimethyl sebacate), DOA (dioctyl adipate), DINA (diisononyl adipate), TCP (tricresyl phosphate) and (meth)acrylic polymers.
- the compound is at least one compound selected from the group consisting of ethylene, DOS (di-2-ethylhexyl sebacate), DOP (dioctyl phthalate), DINP (diisononyl phthalate), DIDP (diisodecyl phthalate), DBP (dibutyl phthalate), DMS (dimethyl sebacate), DOA (dioctyl adipate), DINA (diisononyl adipate) and TCP (tricresyl phosphate), and particularly preferably DMS (dimethyl sebacate).
- the (meth)acrylic polymer as a plasticizer does not include the above component (A).
- the (meth)acrylic polymer as a plasticizer is a polymer of a monomer containing a (meth)acrylic monomer in the main chain, and does not include a polymer having a hydrolyzable silyl group in the molecule.
- the (meth)acrylic polymer as a plasticizer is not particularly limited, but examples thereof include (meth)acrylic polymers that are liquid at 25°C.
- the addition of a (meth)acrylic polymer as a plasticizer may improve flexibility.
- the (meth)acrylic polymer as a plasticizer is preferably used in combination with other plasticizers.
- the (meth)acrylic polymer as a plasticizer is preferably free of polar functional groups and/or reactive functional groups (in this specification, "free of polar functional groups and/or reactive functional groups” is also referred to as "non-functional group type").
- polar functional groups include hydroxyl groups and carboxyl groups, but the polar functional groups are not limited to these.
- Examples of reactive functional groups include epoxy groups and hydrolyzable silyl groups, but the reactive functional groups are not limited to these.
- the monomer for constituting the (meth)acrylic polymer as a plasticizer includes a (meth)acrylic monomer.
- the (meth)acrylic polymer as a plasticizer includes a structural unit derived from a (meth)acrylic monomer.
- the ratio of the constituent units derived from the (meth)acrylic monomer in the (meth)acrylic polymer is preferably 50 mol% or more, more preferably 70 mol% or more, even more preferably 90 mol% or more, and particularly preferably 100 mol% (upper limit 100 mol%), based on the total molar amount of the constituent units constituting the (meth)acrylic polymer.
- the (meth)acrylic polymer as a plasticizer is particularly preferably a homopolymer of a (meth)acrylic monomer.
- the monomer for constituting the (meth)acrylic polymer as a plasticizer may further contain other monomers copolymerizable with the (meth)acrylic monomer.
- the (meth)acrylic polymer as a plasticizer may further contain a constituent unit derived from other monomers copolymerizable with the (meth)acrylic monomer.
- the (meth)acrylic monomer is not particularly limited.
- the other monomers copolymerizable with the (meth)acrylic monomer are not particularly limited.
- the weight average molecular weight (Mw) of the (meth)acrylic polymer as a plasticizer is preferably 1,000 or more and 10,000 or less.
- the weight average molecular weight (Mw) of the (meth)acrylic polymer as a plasticizer can be measured, for example, by gel permeation chromatography (GPC) using polystyrene as a standard substance.
- the viscosity of the (meth)acrylic polymer as a plasticizer at 25°C is not particularly limited, but is preferably 100 to 10,000 mPa ⁇ s, and more preferably 100 to 5,000 mPa ⁇ s. If the viscosity of the (meth)acrylic polymer as a plasticizer at 25°C is 100 mPa ⁇ s or more, the plasticizer is less likely to bleed out from the cured product, and if the viscosity of the (meth)acrylic polymer as a plasticizer at 25°C is 10,000 mPa ⁇ s or less, the compatibility of the plasticizer with other components is better.
- the content of the plasticizer is not particularly limited. From the viewpoint of reducing the hardness of the cured product, the curable resin composition according to one embodiment preferably contains 1 to 30 parts by mass of the plasticizer per 100 parts by mass of the (A) component.
- the content of the plasticizer is preferably 1 to 30 parts by mass, more preferably 1 to 10 parts by mass, even more preferably 1 to 5 parts by mass, and particularly preferably 2 to 5 parts by mass.
- the amount of the plasticizer added is not particularly limited. It is preferable that 1 to 30 parts by mass of the plasticizer is added per 100 parts by mass of the (A) component. It is more preferable that 1 to 10 parts by mass of the plasticizer is added per 100 parts by mass of the (A) component.
- the amount of the (A) component above refers to the total amount of the two or more (A) components.
- the amount of the plasticizer above refers to the total amount of the two or more plasticizers.
- the plasticizer may be a commercially available product and/or a synthetic product.
- commercially available plasticizers include, but are not limited to, DMS manufactured by Toyokuni Oil Mills, DOS, DOA, DOP, DINP, and DIDP from the Sanso Cizer series manufactured by New Japan Chemical Co., Ltd., and UP-1000, UP-1020, UP-1021, UP-1061, UP-1110, and UP-1170 from the ARUFON (registered trademark) series manufactured by Toagosei Co., Ltd.
- the rate of change in viscosity of the curable resin composition is not particularly limited.
- the rate of change in viscosity measured and calculated by the following method (1) is not particularly limited, but is preferably less than 100%.
- the initial viscosity measured and calculated by the following method (1) is not particularly limited, but is preferably 400 Pa ⁇ s or less, and more preferably 300 Pa ⁇ s or less.
- the viscosity after standing is not particularly limited, but is preferably less than 800 Pa ⁇ s, more preferably 600 Pa ⁇ s or less, and even more preferably less than 600 Pa ⁇ s.
- the rate of change in viscosity measured and calculated by the following method (2) is not particularly limited, but is preferably less than 100%.
- Method (1) The viscosity of the curable resin composition is measured at 23°C using a tabletop capillary rheometer viscometer (RH2000) manufactured by NETZSCH, and the obtained value is defined as the "initial viscosity (Pa ⁇ s)".
- the curable resin composition is placed in a plastic container and left in a hot air drying oven set at an atmosphere of 70°C for 5 days. The container is removed from the hot air drying oven and left at 23°C for 2 hours.
- the viscosity of the curable resin composition is then measured at 23°C in the same manner as in the measurement of the "initial viscosity (Pa ⁇ s)" in method (1), and the obtained value is defined as the "viscosity after standing (Pa ⁇ s)".
- Method (2) The viscosity of the curable resin composition is measured at 25°C using a TV-33 viscometer (EHD type) manufactured by Toki Sangyo Co., Ltd., and the obtained value is defined as the "initial viscosity (Pa ⁇ s)".
- the curable resin composition is placed in a plastic container and left in a hot air drying oven set at an atmosphere of 70°C for 5 days.
- the container is removed from the hot air drying oven and left at 25°C for 1 hour, and then the viscosity of the curable resin composition is measured at 25°C in the same manner as in the measurement of the "initial viscosity (Pa ⁇ s)" in method (2) above, and the obtained value is defined as the "viscosity after standing (Pa ⁇ s)".
- the curable resin composition according to one embodiment can be used as a one-liquid type in which all of the components are included, or as a two-liquid type in which each component is divided into two and then mixed to form a single liquid.
- the curable resin composition according to one embodiment can be produced by mixing the components. Therefore, another embodiment of the present invention can be said to relate to a method for producing a curable resin composition, which includes mixing the components (A) to (C).
- the mixing method and mixing conditions are not particularly limited.
- the mixing method and mixing conditions are not particularly limited. In the case of a two-liquid type in which each component is divided into two and then mixed to form a single liquid, each liquid may be produced by mixing the components for constituting each liquid.
- the component (A) In the case of a two-liquid type, it is preferable to divide the component (A) into two liquids, add the component (B) to one, and add the component (C) to the other.
- the above-mentioned additional components, the filler, plasticizer, and antioxidant may be included in the two liquids, or only in one of the liquids. Additional components other than these may also be included in the two liquids, or only in one of the liquids.
- the curing conditions of the curable resin composition according to one embodiment vary depending on the composition of the curable resin composition, and are not particularly limited as long as the curable composition can be sufficiently cured.
- the curing method may be leaving the composition in an atmosphere of 20 to 27°C x 30 to 70% RH or in an atmosphere of 30 to 100°C for both one-component and two-component types, and the curing time may be, for example, 10 minutes to 10 days for both one-component and two-component types.
- the curing conditions of the curable resin composition according to one embodiment for example, in both the one-component type and the two-component type, it is preferable to leave it in an atmosphere of 20° C. to 27° C. and 30% RH to 70% RH for 3 hours to 10 days, more preferably in an atmosphere of 20° C. to 27° C.
- RH to 70% RH for 5 hours to 10 days even more preferably in an atmosphere of 20° C. to 27° C. and 30% RH to 70% RH for 6 days to 10 days, even more preferably in an atmosphere of 20° C. to 27° C. and 30% RH to 70% RH for 7 days to 10 days, and particularly preferably in an atmosphere of 20° C. to 27° C. and 50% RH to 70% RH for 7 days to 10 days. Therefore, it can be said that another aspect of the present invention relates to a cured product obtained by curing the curable resin composition according to the above aspect or the sealant according to the aspect described later.
- Another aspect of the present invention can be said to relate to a method for producing a cured product, which includes curing the curable resin composition according to the above aspect, producing a curable resin composition by the production method according to the above aspect and curing the obtained curable resin composition, or curing a sealing agent according to the aspect described below.
- a cured product having high adhesion to at least one metal and high resistance to coolants can be provided.
- the hardness of the cured product obtained by curing the curable resin composition is not particularly limited, but is preferably A40 or less, more preferably A35 or less, even more preferably A30 or less, and particularly preferably A25 or less.
- the hardness of the cured product obtained by curing the curable resin composition can be measured as follows. The curable resin composition is applied to a mold with a thickness of 1 mm, and left for 7 days in an atmosphere of 23°C and 50% RH to produce a cured product, and six sheets of the resulting cured product are stacked to produce a laminate.
- a hardness meter is pressed against the resulting laminate at a pressure of 10 N, and the maximum hardness is measured as "hardness (unitless)". Details of the method for measuring the hardness of the cured product are in accordance with JIS K 6249:2003.
- the tensile strength of the cured product obtained by curing the curable resin composition is not particularly limited, but is preferably 1.0 MPa or more, more preferably 1.2 MPa or more, even more preferably 1.3 MPa or more, and particularly preferably 1.4 MPa or more.
- the elongation of the cured product according to one embodiment is not particularly limited, but is preferably 150% or more, more preferably 200% or more, even more preferably 240% or more, and particularly preferably 280% or more.
- the tensile strength of the cured product obtained by curing the curable resin composition and the elongation of the curing rate obtained by curing the curable resin composition can be measured as follows.
- the curable resin composition is applied to a mold with a thickness of 1 mm and left in an atmosphere of 23°C and 50% RH for 7 days to prepare a cured product, and a test piece in the shape of a dumbbell No. 5 is cut out from the obtained sheet-like cured product.
- the test piece is set to a base line distance of 25 mm, and pulled at 500 mm/min with a tensile tester, and the base line distance until the dumbbell breaks is measured.
- the calculation is performed using the formula (baseline distance at break - initial baseline distance) / initial baseline distance x 100 to calculate the "elongation rate (%)" and the "tensile strength (MPa)" from the maximum strength of the dumbbell. Details of the measurement method are in accordance with JIS K 6249:2003.
- the cured product obtained by curing the curable resin composition preferably has high adhesion to the adherend, and preferably has high adhesion to metals such as aluminum. In one embodiment, the cured product obtained by curing the curable resin composition preferably has high adhesion to materials containing at least one metal, more preferably has high adhesion to aluminum or an aluminum alloy, and even more preferably has high adhesion to aluminum. In one embodiment, the cured product obtained by curing the curable resin composition is preferably used to bond adherends having surfaces made of a material containing at least one metal, more preferably has high adhesion to adherends having surfaces made of aluminum or an aluminum alloy, and even more preferably has high adhesion to adherends having surfaces made of aluminum. Adherends can be bonded to each other by the cured product obtained by curing the curable resin composition.
- the initial tensile shear adhesive strength of the cured product obtained by curing the curable resin composition to a material containing at least one metal is not particularly limited, but is preferably 0.7 MPa or more, more preferably 0.9 MPa or more, even more preferably 1.0 MPa or more, and particularly preferably 1.1 MPa or more.
- the material containing at least one metal is preferably aluminum or an aluminum alloy, and more preferably aluminum.
- the tensile shear adhesive strength of the cured product obtained by curing the curable resin composition to a material containing at least one metal after immersion is not particularly limited, but is preferably 0.7 MPa or more, more preferably 1.0 MPa or more, even more preferably 1.1 MPa or more, even more preferably 1.2 MPa or more, and particularly preferably 1.3 MPa or more.
- the material containing at least one metal is preferably aluminum or an aluminum alloy, and more preferably aluminum.
- the initial tensile shear adhesive strength of the cured product and the tensile shear adhesive strength of the cured product after immersion in a coolant can be measured as follows.
- a metal (preferably aluminum or aluminum alloy, more preferably aluminum) member with a width of 25 mm x length of 100 mm x thickness of 1 mm, and fix two of the members with a bonding area of 10 mm x 25 mm (clearance of 1 mm) using a curable resin composition to prepare a test piece before curing. Leave the test piece for 7 days in an atmosphere of 23 ° C and 50% RH to cure the curable resin composition in the test piece before curing, and prepare a test piece. Pull the test piece at 50 mm / min with a tensile tester, and calculate the "initial tensile shear adhesive strength (MPa)" from the maximum strength obtained.
- MPa "initial tensile shear adhesive strength
- the cooling water circulated inside a water-cooled radiator contains chemicals such as LLC (registered trademark).
- the cooling water is also called antifreeze, radiator liquid, coolant, etc.
- the sealing properties are deteriorated due to deterioration of the cured product by the cooling water, and there is a concern that the cured product will peel off from the adherend, causing leakage of the cooling water.
- the cured product obtained by curing the curable composition according to the above embodiment is resistant to coolant and is suitable for sealing cooling water.
- another aspect of the present invention relates to a sealant containing the curable resin composition according to the above embodiment.
- Another aspect of the present invention relates to a method for producing a sealant containing the curable resin composition, including producing the curable resin composition by the production method according to the above embodiment.
- a sealant can be provided that can produce a cured product having high adhesion to at least one metal and high resistance to coolant.
- Each of the above aspects of the present invention provides a means for obtaining a cured product having high adhesion to at least one metal and high resistance to coolants.
- a means is provided for obtaining a curable composition having good storage stability and for obtaining a cured product having high adhesion to at least one metal and high resistance to coolants.
- the present invention will now be described in more detail with reference to examples, but the present invention is not limited to these examples.
- the curable resin composition will also be referred to simply as the "composition.”
- a polymer having a main chain made of a monomer containing a (meth)acrylic monomer and having two dimethoxymethylsilyl groups in the molecule (XMAP SA110S, manufactured by Kaneka Corporation, viscosity of 500 Pa ⁇ s (23°C));
- a polymer having a main chain which is a polymer of a monomer containing a (meth)acrylic monomer and has two dimethoxymethylsilyl groups in the molecule XMAP SA100S, manufactured by Kaneka Corporation, viscosity of 250 Pa ⁇ s (23° C.)).
- Component (B') Organometallic catalyst other than component (B)> Titanium diisopropoxybis(ethyl acetoacetate) (Orgatics TC-750, manufactured by Matsumoto Fine Chemical Co., Ltd.).
- ⁇ Filler> Hydrophobic calcium carbonate powder (NCC#110, manufactured by Nitto Funka Kogyo Co., Ltd., calcium carbonate powder surface-treated with fatty acid, average particle size 2.1 ⁇ m, apparent specific gravity 0.61 g/ml, DOP absorption 16 ml/100 g), Fumed silica powder (AEROSIL RY200, manufactured by Nippon Aerosil Co., Ltd., average particle size 12 nm) surface-treated with dimethyl silicone (also known as polydimethylsiloxane, dimethylpolysiloxane).
- NCC#110 manufactured by Nitto Funka Kogyo Co., Ltd., calcium carbonate powder surface-treated with fatty acid, average particle size 2.1 ⁇ m, apparent specific gravity 0.61 g/ml, DOP absorption 16 ml/100 g
- Fumed silica powder (AEROSIL RY200, manufactured by Nippon Aerosil Co., Ltd., average particle size 12 nm) surface-
- ⁇ Plasticizer> Non-functional acrylic polymer (ARUFON UP1110, manufactured by Toagosei Co., Ltd., viscosity 3500 mPa ⁇ s (25°C), non-functional (meth)acrylic polymer, liquid at 25°C), Dimethyl sebacate (DMS, manufactured by Toyokuni Oil Mills Co., Ltd.).
- ARUFON UP1110 manufactured by Toagosei Co., Ltd., viscosity 3500 mPa ⁇ s (25°C)
- non-functional (meth)acrylic polymer liquid at 25°C
- DMS Dimethyl sebacate
- ADEKA STAB AO-26 Thioether-based antioxidant (ADEKA STAB AO-26, manufactured by ADEKA Corporation, viscosity 5000 mPa ⁇ s (25° C.), liquid at 25° C.).
- Curable resin compositions of Examples 1 to 11 and Comparative Example 1 were prepared.
- Component (A), component (C), a silane coupling agent not having an epoxy group, a plasticizer, and an antioxidant were weighed and charged into a stirring kettle, and the mixture in the stirring kettle was stirred for 1 hour while being vacuum degassed.
- a filler was weighed and charged into the stirring kettle, and the mixture in the stirring kettle was stirred for 1 hour while being vacuum degassed.
- component (B) was weighed and charged into the stirring kettle, and the mixture in the stirring kettle was stirred for 30 minutes while being vacuum degassed.
- Table 1 all values are expressed in parts by mass.
- “Change rate (%)” was calculated as (viscosity after standing - initial viscosity) / initial viscosity x 100.
- the change rate of the viscosity calculated in this manner is not particularly limited, but in order to prevent the application property from being affected by changes in properties during storage, it is preferable that the change rate of the viscosity is less than 100%.
- the initial viscosity is not particularly limited, but is preferably 400 Pa ⁇ s or less, and more preferably 300 Pa ⁇ s or less.
- the viscosity after standing is not particularly limited, but is preferably less than 800 Pa ⁇ s, more preferably 600 Pa ⁇ s or less, and even more preferably less than 600 Pa ⁇ s.
- the viscosity is 800 Pa ⁇ s or less
- the applicability with a dispenser or the like is better.
- the viscosity is 600 Pa ⁇ s or less
- the applicability with a dispenser or the like is even better, and when the viscosity is less than 600 Pa ⁇ s, the applicability with a dispenser or the like is particularly good.
- the units of the initial viscosity and the viscosity after standing are Pa ⁇ s
- the unit of the rate of change is %.
- the composition was applied to a mold having a thickness of 1 mm, and left for 7 days in an atmosphere of 23°C and 50% RH to produce a cured product.
- Six sheets of the obtained cured product in sheet form were stacked to produce a laminate, and a durometer hardness tester (JIS-A) was used to press a hardness tester against the laminate at a pressure of 10 N, and the maximum hardness was measured as "hardness (unitless)". Details of the measurement method were in accordance with JIS K 6249:2003.
- the hardness is not particularly limited, but in consideration of maintaining the tensile shear adhesive strength described later better, it is preferable that the hardness is A40 or less.
- the details of the measurement method were in accordance with JIS K 6249:2003.
- the tensile strength and elongation rate are not particularly limited, but considering the conformability of the cured product to the adherend, the tensile strength is preferably 1.0 MPa or more, and the elongation rate is preferably 150% or more.
- the initial peeling state was confirmed visually according to the following evaluation criteria.
- the details of the measurement method were in accordance with JIS K 6249: 2003.
- the initial tensile shear adhesive strength is not particularly limited, but it is preferably 0.7 MPa or more in consideration of making peeling from the adherend less likely to occur.
- the test pieces were immersed in an aqueous solution containing 50% by volume of Toyota genuine Super Long Life Coolant (also known as Super LLC) available at Toyota Motor Corporation dealers and left at 120°C for 240 hours. The test pieces were then removed, the immersion liquid was wiped off, and the pieces were left at 23°C for 2 hours.
- the tensile shear adhesive strength was then measured using the same method as above (the same method as for measuring "initial adhesive strength (MPa)"), and the "tensile shear adhesive strength after immersion (adhesive strength after immersion) (MPa)” was calculated from the maximum strength obtained.
- the "peeling state” (“peeling state after immersion”) was also visually confirmed according to the following evaluation criteria. There are no particular limitations on the shear adhesive strength after immersion (adhesive strength after immersion), but it is preferable that it be 0.7 MPa or more.
- rate of change (adhesive strength after immersion - initial adhesive strength) / initial adhesive strength x 100.
- rate of change (adhesive strength after immersion - initial adhesive strength) / initial adhesive strength x 100.
- the rate of change in adhesive strength include, but are not limited to, preferably 30% or less, more preferably 25% or less, even more preferably less than 25%, even more preferably 20% or less, and particularly preferably 15% or less.
- the peeling condition is " ⁇ " and the rate of change in adhesive strength is 50% or less, the adhesion is good and the sealability against the immersion liquid can be well maintained.
- the initial peeling condition and the peeling condition after immersion are " ⁇ " and the rate of change in adhesive strength is 50% or less, the cured product exhibits high adhesion to the adherend and high resistance to coolant, and it was determined to be a good result.
- the units of tensile strength are MPa
- the units of elongation are %
- the units of initial adhesive strength and adhesive strength after immersion are both MPa
- the units of rate of change are %.
- an organic zinc catalyst as component (B) and 3-glycidoxypropyltrimethoxysilane as component (C) were used.
- the hardness, tensile strength, and elongation percentage of the cured products obtained by curing the curable resin compositions of Examples 1 and 12 to 14 were not significantly different from those obtained by curing the curable resin compositions of Comparative Examples 2 to 9.
- the cured product according to one embodiment of the present invention exhibits high resistance to coolants.
- the curable resin composition according to one embodiment of the present invention is suitable for use in sealing coolants.
- the use of sealing coolants corresponds to use under harsh conditions for a sealant that comes into contact with coolants. In such applications, it has been known that the sealability is prone to deterioration due to peeling of the cured sealant from the adherend or deterioration of the cured sealant. As a result, it has been known that leakage of liquid (coolant) is likely to occur. However, the sealant according to one embodiment of the present invention can be used stably in such important areas.
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Abstract
Description
(B)成分:有機亜鉛触媒
(C)成分:エポキシ基を有するシラン系カップリング剤。
(B)成分:有機亜鉛触媒
(C)成分:エポキシ基を有するシラン系カップリング剤。
硬化性樹脂組成物を調製するために下記成分を準備した。
・主鎖が(メタ)アクリルモノマーを含む単量体の重合体であり、分子内にジメトキシメチルシリル基を2つ有する、ポリマー(XMAP SA110S、カネカ株式会社製、粘度が500Pa・s(23℃))、
・主鎖が(メタ)アクリルモノマーを含む単量体の重合体であり、分子内にジメトキシメチルシリル基を2つ有する、ポリマー(XMAP SA100S、カネカ株式会社製、粘度が250Pa・s(23℃))。
・亜鉛錯体(K-KAT 670 King Industries社製)。
・チタンジイソプロポキシビス(エチルアセトアセテート)(オルガチックスTC-750、マツモトファインケミカル株式会社製)。
・3-グリシドキシプロピルトリメトキシシラン(KBM-403、信越化学工業株式会社製)、
・3-グリシドキシプロピルメチルジエトキシシラン(KBE-402、信越化学工業株式会社製)。
・N-2-(アミノエチル)-3-アミノプロピルトリメトキシシラン(KBM-603、信越化学工業株式会社製)、
・3-アミノプロピルトリメトキシシラン(KBM-903、信越化学工業株式会社製)、
・メチルトリメトキシシラン(KBM-13、信越化学工業株式会社製)、
・ジフェニルジメトキシシラン(KBM-202SS、信越化学工業株式会社製)。
・疎水性炭酸カルシウム粉(NCC#110、日東粉化工業株式会社製、脂肪酸で表面処理された炭酸カルシウム粉、平均粒径2.1μm、見掛比重0.61g/ml、DOP吸収量16ml/100g)、
・ジメチルシリコーン(別名:ポリジメチルシロキサン、ジメチルポリシロキサン)で表面処理されたヒュームドシリカ粉(AEROSIL RY200、日本アエロジル株式会社製、平均粒径12nm)。
・無官能基タイプのアクリル系ポリマー(ARUFON UP1110、東亞合成株式会社製、粘度3500mPa・s(25℃)、無官能基タイプの(メタ)アクリル系重合体、25℃で液状)、
・セバシン酸ジメチル(DMS、豊国製油株式会社製)。
・チオエーテル系酸化防止剤(アデカスタブ AO-26、株式会社ADEKA製、粘度5000mPa・s(25℃)、25℃で液状)。
NETZSCH社製の卓上型キャピラリーレオメーター粘度計(RH2000)で下記の測定条件に従って組成物の粘度を測定して、得られた値を「初期粘度(Pa・s)」とした。組成物をプラスチック製の容器に入れて、70℃雰囲気に設定した熱風乾燥炉で5日間放置した。その後、熱風乾燥炉から容器を取り出して23℃に2時間放置した後に、前記と同様の方法(「初期粘度(Pa・s)」の測定と同様の方法)で組成物の粘度を測定し、得られた値を「放置後粘度(Pa・s)」とした。「変化率(%)」=(放置後粘度-初期粘度)/初期粘度×100として計算した。このように算出される粘度の変化率は、特に制限されないが、保管時の性状変化により塗布性に影響が出ないためには、粘度の変化率は100%未満であることが好ましい。なお、初期粘度は、特に制限されないが、400Pa・s以下であることが好ましく、300Pa・s以下であることがより好ましい。また、放置後粘度は、特に制限されないが、800Pa・s未満であることが好ましく、600Pa・s以下であることがより好ましく、600Pa・s未満であることがさらに好ましい。粘度が800Pa・s以下であると、ディスペンサー等での塗布性がより良好となる。粘度が600Pa・s以下であると、ディスペンサー等での塗布性がさらに良好となり、粘度が600Pa・s未満であると、ディスペンサー等での塗布性が特に良好となる。表2において、初期粘度および放置後粘度の単位はそれぞれPa・sであり、変化率の単位は%である。
キャピラリーダイ:φ2.0mm、L32mm、
測定せん断速度:20s-1、
測定温度:23℃。
組成物を厚さ1mmの型に塗布し、23℃で50%RH雰囲気にて7日間放置して硬化物を作製した。得られたシート状の硬化物を6枚重ねて積層体を作製し、デュロメーター硬さ試験機(JIS-A)を用いて、加圧10Nで当該積層体に硬度計を押し当てて、硬度の最大値を「硬度(単位無し)」として測定した。測定方法の詳細は、JIS K 6249:2003に準じた。硬度は、特に制限されないが、後述する引張剪断接着強さをより良好に維持することを考慮すると、硬度がA40以下であることが好ましい。
組成物を厚さ1mmの型に塗布し、23℃で50%RH雰囲気にて7日間放置して硬化物を作製した。得られたシート状の硬化物からダンベル5号の形状のテストピースを切り出した。テストピースに基線間距離を25mmとして、引張試験機により500mm/minで引っ張り、ダンベルが破断するまでの基線間距離を測定した。(破断時基線間距離-初期基線間距離)/初期基線間距離×100の計算式で計算を行い、「伸び率(%)」を算出すると共に、ダンベルの最大強度から「引張強さ(MPa)」を計算した。測定方法の詳細は、JIS K 6249:2003に準じた。引張強さおよび伸び率は、それぞれ、特に制限されないが、硬化物の被着体に対する追従性を考慮すると、引張強さは1.0MPa以上であることが好ましく、伸び率は150%以上であることが好ましい。
アルミ二ウム製の幅25mm×長さ100mm×厚さ1mmの部材を用意し、10mm×25mmの接着面積(クリアランス1mm)で組成物により2枚の当該部材を貼り合わせて固定して硬化前のテストピースを作製した。23℃で50%RH雰囲気にて7日間放置して硬化前のテストピース中の組成物を硬化させて、テストピースを作製した。引張試験機によりテストピースを50mm/minで引っ張り、得られた最大強度から「初期の引張剪断接着強さ(初期接着強さ)(MPa)」を算出した。また、下記の評価基準に従い目視にて剥離状態(「初期剥離状態」)を確認した。測定方法の詳細は、JIS K 6249:2003に準じた。初期の引張剪断接着強さ(初期接着強さ)は、特に制限されないが、被着体からの剥離をより生じ難くすることを考慮すると、0.7MPa以上であることが好ましい。
○:剥離面の50%以上100%以下が凝集破壊である、
△:剥離面の0%超50%未満が凝集破壊である、
×:剥離面の全てが界面破壊である。
東機産業株式会社製のTV-33型粘度計(EHD型)を用いて下記の測定条件に従って組成物の粘度を測定し、得られた値を「初期粘度(Pa・s)」とした。また、組成物をプラスチック製の容器に入れて、70℃雰囲気に設定した熱風乾燥炉で5日間放置した。その後、熱風乾燥炉から容器を取り出して25℃に1時間放置した後に、前記と同様の方法(「初期粘度(Pa・s)」の測定と同様の方法)で組成物の粘度を測定し、得られた値を「放置後粘度(Pa・s)」とした。
コーンローター:3°×R14、
回転速度:0.5~2.5rpm(粘度により回転速度を変える。)、
測定時間:3分、
測定温度:25℃。
○:100%未満、
×:100%以上。
Claims (10)
- (A)~(C)成分を含む硬化性樹脂組成物。
(A)成分:主鎖が(メタ)アクリルモノマーを含む単量体の重合体であり、分子内に加水分解性シリル基を有する、ポリマー
(B)成分:有機亜鉛触媒
(C)成分:エポキシ基を有するシラン系カップリング剤 - 前記(A)成分の加水分解性シリル基が、ジアルコキシシリル基である請求項1に記載の硬化性樹脂組成物。
- さらに、エポキシ基を有するシラン系カップリング剤以外のカップリング剤を含む請求項1に記載の硬化性樹脂組成物。
- 前記(A)成分100質量部に対して、前記(C)成分を1~20質量部含み、前記エポキシ基を有するシラン系カップリング剤以外のカップリング剤を5~25質量部含む請求項3に記載の硬化性樹脂組成物。
- さらに、充填剤を含む請求項1に記載の硬化性樹脂組成物。
- 前記(A)成分100質量部に対して、前記充填剤を50~150質量部含む請求項5に記載の硬化性樹脂組成物。
- さらに、可塑剤を含む請求項1に記載の硬化性樹脂組成物。
- 前記(A)成分100質量部に対して、前記可塑剤を1~30質量部含む請求項7に記載の硬化性樹脂組成物。
- 請求項1に記載の硬化性樹脂組成物を含むシール剤。
- 請求項1~8のいずれか1項に記載の硬化性樹脂組成物または請求項9に記載のシール剤を硬化してなる硬化物。
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| JP2024564346A JPWO2024128149A1 (ja) | 2022-12-14 | 2023-12-08 | |
| CN202380084318.XA CN120322509A (zh) | 2022-12-14 | 2023-12-08 | 固化性树脂组合物、包含其的密封剂及它们的固化物 |
| KR1020257013531A KR20250123761A (ko) | 2022-12-14 | 2023-12-08 | 경화성 수지 조성물, 이를 포함하는 실링제, 및 이들의 경화물 |
| EP23903436.6A EP4636031A1 (en) | 2022-12-14 | 2023-12-08 | Curable resin composition, sealing agent containing same, and cured product of said curable resin composition or sealing agent |
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| KR (1) | KR20250123761A (ja) |
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|---|---|---|---|---|
| JPS6443512A (en) | 1987-08-10 | 1989-02-15 | Daikin Ind Ltd | Phenyl alpha-trifluoromethylacrylate copolymer and its preparation |
| JPH09272714A (ja) | 1996-02-08 | 1997-10-21 | Kanegafuchi Chem Ind Co Ltd | 末端に官能基を有する(メタ)アクリル系重合体の 製造方法 |
| WO2005095535A1 (ja) * | 2004-04-01 | 2005-10-13 | Three Bond Co., Ltd. | 一液常温硬化型シール剤組成物 |
| JP2005281528A (ja) * | 2004-03-30 | 2005-10-13 | Yokohama Rubber Co Ltd:The | 光学材料用接着剤組成物 |
| JP2008274119A (ja) | 2007-04-27 | 2008-11-13 | Kaneka Corp | 硬化性組成物 |
| JP2011006535A (ja) * | 2009-06-24 | 2011-01-13 | Yokohama Rubber Co Ltd:The | 硬化性樹脂組成物 |
| WO2018003688A1 (ja) * | 2016-06-30 | 2018-01-04 | セメダイン株式会社 | 2液型エポキシ樹脂組成物 |
| WO2021126988A1 (en) * | 2019-12-19 | 2021-06-24 | Henkel IP & Holding GmbH | Moisture curable polyacrylate compositions and uses thereof |
| WO2022215522A1 (ja) * | 2021-04-08 | 2022-10-13 | 株式会社スリーボンド | 二液硬化型樹脂組成物及びその硬化物 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6052392U (ja) | 1983-09-16 | 1985-04-12 | 工業技術院長 | クランクレスコンプレツサ− |
-
2023
- 2023-12-08 EP EP23903436.6A patent/EP4636031A1/en active Pending
- 2023-12-08 JP JP2024564346A patent/JPWO2024128149A1/ja active Pending
- 2023-12-08 CN CN202380084318.XA patent/CN120322509A/zh active Pending
- 2023-12-08 WO PCT/JP2023/043962 patent/WO2024128149A1/ja not_active Ceased
- 2023-12-08 KR KR1020257013531A patent/KR20250123761A/ko active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6443512A (en) | 1987-08-10 | 1989-02-15 | Daikin Ind Ltd | Phenyl alpha-trifluoromethylacrylate copolymer and its preparation |
| JPH09272714A (ja) | 1996-02-08 | 1997-10-21 | Kanegafuchi Chem Ind Co Ltd | 末端に官能基を有する(メタ)アクリル系重合体の 製造方法 |
| US5986014A (en) | 1996-02-08 | 1999-11-16 | Kaneka Corporation | Processes for preparing (meth)acrylic polymers having functional groups at the chain ends |
| JP2005281528A (ja) * | 2004-03-30 | 2005-10-13 | Yokohama Rubber Co Ltd:The | 光学材料用接着剤組成物 |
| WO2005095535A1 (ja) * | 2004-04-01 | 2005-10-13 | Three Bond Co., Ltd. | 一液常温硬化型シール剤組成物 |
| JP2008274119A (ja) | 2007-04-27 | 2008-11-13 | Kaneka Corp | 硬化性組成物 |
| JP2011006535A (ja) * | 2009-06-24 | 2011-01-13 | Yokohama Rubber Co Ltd:The | 硬化性樹脂組成物 |
| WO2018003688A1 (ja) * | 2016-06-30 | 2018-01-04 | セメダイン株式会社 | 2液型エポキシ樹脂組成物 |
| WO2021126988A1 (en) * | 2019-12-19 | 2021-06-24 | Henkel IP & Holding GmbH | Moisture curable polyacrylate compositions and uses thereof |
| WO2022215522A1 (ja) * | 2021-04-08 | 2022-10-13 | 株式会社スリーボンド | 二液硬化型樹脂組成物及びその硬化物 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4636031A1 |
Also Published As
| Publication number | Publication date |
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| EP4636031A1 (en) | 2025-10-22 |
| CN120322509A (zh) | 2025-07-15 |
| JPWO2024128149A1 (ja) | 2024-06-20 |
| KR20250123761A (ko) | 2025-08-18 |
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