WO2021201208A1 - 接着性組成物 - Google Patents
接着性組成物 Download PDFInfo
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- WO2021201208A1 WO2021201208A1 PCT/JP2021/014132 JP2021014132W WO2021201208A1 WO 2021201208 A1 WO2021201208 A1 WO 2021201208A1 JP 2021014132 W JP2021014132 W JP 2021014132W WO 2021201208 A1 WO2021201208 A1 WO 2021201208A1
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/10—Homopolymers or copolymers of methacrylic acid esters
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- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
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- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
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- C08K5/00—Use of organic ingredients
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- C08K5/51—Phosphorus bound to oxygen
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- 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
- C08L33/24—Homopolymers or copolymers of amides or imides
- C08L33/26—Homopolymers or copolymers of acrylamide or methacrylamide
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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- C09D201/00—Coating compositions based on unspecified macromolecular compounds
- C09D201/02—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/24—Homopolymers or copolymers of amides or imides
- C09J133/26—Homopolymers or copolymers of acrylamide or methacrylamide
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- C09J201/00—Adhesives based on unspecified macromolecular compounds
- C09J201/02—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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- C08K5/14—Peroxides
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
- C08K5/5397—Phosphine oxides
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- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
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- C09J2400/226—Presence of unspecified polymer in the substrate
Definitions
- the present invention relates to an adhesive composition.
- the present application claims priority to Japanese Patent Application No. 2020-067404 filed on April 3, 2020, the contents of which are incorporated herein by reference.
- radical curable adhesives containing (meth) acrylate as the main component can be cured by various curing methods such as photocuring, heat curing, anaerobic curing, and two-component mixed curing. It is used in a wide range of fields such as parts, aircraft, building materials, sporting goods, civil engineering, packaging, and medical care.
- conventional radical curable adhesives are low surface energy resin substrates such as polyethylene (PE), polypropylene (PP), polytetrafluoroethylene (PTFE), polyacetal (POM), nylon 6 (PA6), polyethylene terephthalate.
- PET Polyethylene terephthalate
- PBT Polybutylene terephthalate
- PDMS Polydimethylsilicone
- PEEK Polyether ether ketone
- Modified polyphenylene ether PPE
- PPS Polyphenylene sulfide
- COP Cycloolefin polymer
- PET Various plastics such as COC), polymethylpentene (PMP), liquid crystal polyester (LCP) and high surface energy resin substrates such as polyvinyl chloride (PVC), polycarbonate (PC), polymethylmethacrylate (PMMA), etc. It was difficult to bond the resin with one agent in a well-balanced manner.
- Patent Document 1 describes urethane (meth) acrylate, an ethylenically unsaturated group-containing compound having a hydroxyl group in the molecule, an ethylenically unsaturated group-containing compound having a glass transition temperature of a homopolymer of 50 ° C. or higher, and a homopolymer.
- an active energy ray-curable adhesive composition for a plastic film or sheet containing a predetermined amount of an ethylenically unsaturated group-containing compound having a glass transition temperature of 20 ° C. or lower.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an adhesive composition having excellent adhesive strength to various difficult-to-adhere materials.
- the present invention is as follows.
- (A) Radical Polymerizable Compound (B) Formula (I) (In the formula, X 1 and X 2 independently represent an alkyl group of C7 to C20 or an alkoxy group of C7 to C20, n represents 0 or 1, and Z 1 and Z 2 independently represent, respectively.
- Each R represents a single bond or a C1 to C3 alkylene group, each R independently represents an organic group or a halogeno group, m1 and m2 each independently represent an integer of 0 to 4, and Y represents polymerization.
- the coating agent is a primer.
- the adhesive composition according to (5) or (6), wherein the adhesive composition is an adhesive.
- the present invention can provide an adhesive composition having excellent adhesive strength to various difficult-to-adhere materials such as polyethylene terephthalate, polyethylene, polypropylene, modified polyphenylene ether, polyphenylene sulfide, and cycloolefin polymer.
- difficult-to-adhere materials such as polyethylene terephthalate, polyethylene, polypropylene, modified polyphenylene ether, polyphenylene sulfide, and cycloolefin polymer.
- the radical-polymerizable compound is not particularly limited, but is a monomer having an unsaturated double bond such as a vinyl group, an allyl group, or a (meth) acryloyl group, or an oligomer thereof. , Polymers and the like can be used.
- "(meth) acryloyl group” means "acryloyl group” and / or "methacryloyl group”.
- radically polymerizable compound monofunctional or polyfunctional (meth) acrylate, (meth) acrylamide, or an oligomer thereof can be preferably used.
- the monofunctional (meth) acrylate monomer is, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t.
- the polyfunctional (meth) acrylate monomer is a monomer having two or more (meth) acrylate groups in the molecule, preferably 2 to 6, such as neopentyl glycol di (meth) acrylate and stearic acid-modified pentaerythritol.
- Functional (meth) acrylate trimethylolpropantri (meth) acrylate, pentaerythritol tri (meth) acrylate, tris (acryloyloxyethyl) isocyanurate, ditrimethylolpropanetetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, di.
- trifunctional or higher functional (meth) acrylates such as pentaerythritol monohydroxypenta (meth) acrylate, alkyl-modified dipentaerythritol pentaacrylate, and dipentaerythritol hexa (meth) acrylate.
- Examples of the (meth) acrylate oligomer include urethane (meth) acrylate having a polybutadiene skeleton, urethane (meth) acrylate having a hydrogenated polybutadiene skeleton, urethane (meth) acrylate having a polycarbonate skeleton, urethane (meth) acrylate having a polyether skeleton, and polyester.
- Examples thereof include urethane (meth) acrylate of the skeleton, urethane (meth) acrylate of the castor oil skeleton, isoprene-based (meth) acrylate, hydrogenated isoprene-based (meth) acrylate, and epoxy (meth) acrylate oligomer.
- These monofunctional or polyfunctional (meth) acrylate monomers or (meth) acrylate oligomers can be used alone or in combination of two or more.
- Examples of (meth) acrylamide include dimethyl (meth) acrylamide, diethyl (meth) acrylamide, isopropyl (meth) acrylamide and the like.
- the radically polymerizable compound other than the above (meth) acrylate and (meth) acrylamide may be appropriately selected according to the desired physical properties such as melting point, viscosity or refractive index, and is not particularly limited, but is specific. The following are examples.
- Vinyl compounds such as styrene, maleic anhydride, vinyl acetate, vinyl chloride, vinylidene chloride, acrylonitrile, vinyl ether, achlorine, and divinylbenzene; olefin compounds such as ethylene, propylene, and butadiene.
- the polymer (B) component having a repeating unit derived from a polymerizable compound represented by the formula (I) is represented by the formula (I).
- X 1 and X 2 independently represent an alkyl group of C7 to C20 or an alkoxy group of C7 to C20, n represents 0 or 1, and Z 1 and Z 2 independently represent, respectively.
- Each R represents a single bond or a C1 to C3 alkylene group, each R independently represents an organic group or a halogeno group, m1 and m2 each independently represent an integer of 0 to 4, and Y represents polymerization. Represents a possible functional group.
- It is a polymer having a repeating unit derived from a polymerizable compound represented by, and has a weight average molecular weight of 35,000 to 110,000.
- a polymer having a repeating unit derived from a polymerizable compound represented by the formula (I) refers to a polymer having one or more repeating units derived from a polymerizable compound represented by the formula (I).
- the polymer having a repeating unit derived from a polymerizable compound represented by the formula (I) is a repeating unit derived from (meth) acrylic acid ester as a repeating unit derived from a radically polymerizable compound other than the formula (I). Can also have.
- each repeating unit may be randomly arranged, alternately arranged, or blocked.
- the molecular chain of the above copolymer may be a straight chain or a branched chain.
- the branched chain include a branched chain formed by branching at one point (star type) and a branched chain formed by branching at a plurality of points (graft type).
- X 1 and X 2 independently represent an alkyl group of C7 to C20 or an alkoxy group of C7 to C20, respectively.
- a linear group or a branched chain group can be preferably used as the alkyl group of C7 to C20 in X 1 and X 2 .
- linear ones n-heptyl group, n-octyl group, n-nonyl group, n-decyl group, n-dodecyl group, n-tridecylic group, n-tetradecyl group, n-hexadecyl group, n-octadecyl group.
- Groups, n-eikosyl groups and the like can be mentioned.
- the branched chains include 1,1,2,2-tetramethylpropyl group, 1,1,3-trimethylbutyl group, 1-ethylpentyl group, 1,1,3,3-tetramethylbutyl group, 2 , 2,3,3-tetramethylbutyl group, 1,2,4-trimethylpentyl group, 2,4,4-trimethylpentyl group, 2,2,4-trimethylpentyl group, 1-ethyl-4-methylpentyl group Group, 3-ethyl-3-methylpentyl group, 3-ethyl-4-methylpentyl group, 1-ethyl-1-methylpentyl group, 1,1-dimethylhexyl group, 3,3-dimethylhexyl group, 4, 4-Dimethylhexyl group, 2-ethylhexyl group, 3-ethylhexyl group, 6-methylheptyl group, 1,3,5-trimethylhexyl group, 1,1,3-trimethylhexyl group, 1-
- a linear group or a branched chain group can be preferably used as the alkoxy groups C7 to C20 in X 1 and X 2 .
- linear ones n-heptyloxy group, n-octyloxy group, n-nonyloxy group, n-decyloxy group, n-dodecyloxy group, n-tridecyloxy group, n-tetradecyloxy group, n -Hexadecyl group oxy, n-octadecyloxy group, n-eicosyloxy group and the like can be mentioned.
- Branched chains include 1,1,2,2-tetramethylpropyloxy group, 1,1,3-trimethylbutyloxy group, 1-ethylpentyloxy group, 1,1,3,3-tetramethylbutyl.
- n 0 or 1.
- Z 1 and Z 2 independently represent a single bond or a C1 to C3 alkylene group.
- Examples of the C1-C3 alkylene group in Z 1 and Z 2 include methylene, ethylene, propane-1,3-diyl and the like.
- R represents an organic group or a halogeno group.
- the organic group is not particularly limited as long as it is chemically acceptable and has the effect of the present invention.
- Organic groups include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, s-butyl group, i-butyl group, t-butyl group, n-pentyl group and n-hexyl group.
- C1-C6 alkyl groups such as C1-C6 alkyl groups, C6-C10 aryl groups such as phenyl groups and naphthyl groups, methoxy groups, ethoxy groups, n-propoxy groups, i-propoxy groups, n-butoxy groups, s-butoxy groups, i. -C1-C6 alkoxy groups such as butoxy group and t-butoxy group, chloromethyl group, chloroethyl group, trifluoromethyl group, 1,2-dichloro-n-propyl group, 1-fluoro-n-butyl group, per Examples thereof include C1-C6 haloalkyl groups such as a fluoro-n-pentyl group. Examples of the halogeno group include a fluoro group, a chloro group, a bromo group and an iod group.
- n1 and m2 independently represent an integer of 0 to 4.
- Y represents a polymerizable functional group.
- the polymerizable functional group includes a vinyl group, an allyl group, an acryloyl group, a methacryloyl group, a vinyloxycarbonyl group, a prop-1-ene-2-yloxycarbonyl group, an allyloxycarbonyl group, and other polymerizable carbon-carbons. Examples thereof include a group having a double bond.
- Y is preferably an acryloyl group or a methacryloyl group.
- the above formula (I) includes a compound represented by the following formula (II).
- Y, Z 1 , Z 2 , X 1 , X 2 , R, m1, and m2 are the same as those described in the formula (I).
- N, N-bis (4- (1,1,3,3-tetramethylbutyl) phenyl) is preferable.
- the (meth) acrylic acid ester is preferably a C1-C18 alkyl (meth) acrylic acid ester which may have an unsubstituted or substituent.
- the alkyl moiety of the alkyl (meth) acrylic acid ester may be linear, branched or cyclic (alicyclic), preferably a linear or branched alkyl group. In the case of linear or branched alkyl (meth) acrylic acid esters, the alkyl moiety is preferably C1 to C12.
- Examples of the substituent which may be substituted with the (meth) acrylic acid ester include, but are not limited to, an aliphatic group, a polar group, an aromatic group, and a heteroaromatic group.
- Examples of the aliphatic group include an alkyl group such as a methyl group and an ethyl group, an alkenyl group such as a vinyl group and an allyl group, and an alkynyl group such as an ethynyl group.
- Examples of the polar group include a hydroxyl group, an amino group, and a tetrahydrofurfuryl group.
- Aromatic groups are aromatic hydrocarbon groups containing one or more rings.
- a heteroaromatic group is an aromatic group having one or more O, S, or N as a heteroatom.
- a pyridinyl group, a thienyl group, a frill group, a benzimidazolyl group and the like can be mentioned.
- (meth) acrylic acid ester examples include methyl (meth) acrylate, ethyl (meth) acrylate, hydroxyethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, and n-butyl.
- composition ratio of repeating unit When the component (B) used in the present invention has a repeating unit derived from a polymerizable compound represented by the formula (I) and a repeating unit derived from a (meth) acrylic acid ester, that is, represented by the formula (I).
- the repeating unit derived from the polymerizable compound represented by the formula (I) in the copolymer and ( The content of the repeating unit derived from the meta) acrylic acid ester is not particularly limited.
- the repeating unit derived from the polymerizable compound represented by the formula (I) and the repeating unit derived from the (meth) acrylic acid ester have a molar ratio of 99.5: 0.5 to 60:40 and 99: 1 to 70.
- the range of: 30, 98: 2 to 75:25, 95: 5 to 80:20, 20: 80 to: 5: 95, 40: 60 to 0.5: 99.5 and the like can be selected.
- the component (B) used in the present invention is a polymer consisting only of a repeating unit derived from a polymerizable compound represented by the formula (I), or a repeating unit derived from a polymerizable compound represented by the formula (I) and (meth). Any copolymer having a repeating unit derived from an acrylic acid ester can be used without particular limitation, and may have a repeating unit derived from another radically polymerizable compound.
- the repeating unit derived from other radically polymerizable compounds is one or more radicals other than the repeating unit derived from the polymerizable compound represented by the formula (I) and the repeating unit derived from (meth) acrylic acid ester. It means a repeating unit derived from a polymerizable compound.
- the polymerizable compound represented by the formula (I) and the polymerizable compound other than the (meth) acrylic acid ester may be appropriately selected according to the desired physical properties such as melting point, viscosity or refractive index, and are particularly limited. Although it is not a compound, specific examples include the following.
- Vinyl compounds such as (meth) acrylamide, styrene, maleic anhydride, vinyl acetate, vinyl chloride, vinylidene chloride, acrylonitrile, vinyl ether, achlorine, and divinylbenzene; olefin compounds such as ethylene, propylene, and butadiene.
- a (meth) acrylic acid halide such as an acid chloride is reacted in a solvent in the presence of a base.
- the solvent include amide solvents such as N, N-dimethylformamide (DMF) and N, N-dimethylacetamide, and ether solvents such as tetrahydrofuran (THF), 1,2-dimethoxyethane, diethyl ether and methyl cellsolve.
- Aromatic hydrocarbons such as benzene, toluene, xylene, chlorobenzene, dichlorobenzene and benzonitrile, saturated hydrocarbons such as pentane, hexane, octane and cyclohexane, halogens such as dichloromethane, chloroform, carbon tetrachloride and 1,2-dichloroethane. Examples thereof include chemical hydrocarbons, and one or more of these mixed solvents can be used.
- Examples of the base include aliphatic amines such as triethylamine and tributylamine, aromatic amines such as pyridine, N-ethylpyridine, N, N-dimethylaniline and N, N-dimethylaminopyridine, sodium ethylate and sodium methylate.
- Organic bases such as metal alkoxides and alkali metals such as lithium hydroxide, sodium hydroxide, potassium hydroxide, lithium carbonate, sodium carbonate, potassium carbonate, calcium hydroxide, magnesium hydroxide, calcium carbonate, magnesium carbonate, sodium hydrogencarbonate, etc.
- an inorganic base such as an alkali earth metal hydroxide, an alkali metal or an alkaline earth metal carbonate can be used.
- the reaction temperature is ⁇ 50 ° C. to 200 ° C.
- the polymer used in the present invention is particularly limited as long as it is only the polymerizable compound represented by the formula (I) or a polymer of the polymerizable compound represented by the formula (I) and the (meth) acrylic acid ester. Can be used without.
- the polymerization reaction is not particularly limited, and may be a known method for synthesizing polyacrylate or the like, and examples thereof include radical polymerization, anionic polymerization, cationic polymerization, ring-opening polymerization, and coordination polymerization. An example is shown in the examples.
- the polymerizable compound represented by the formula (I) or the formula (II) is used.
- the polymerization reaction is carried out by heating or irradiating a compound of (meth) acrylic acid ester in a solvent in the presence of a radical polymerization initiator.
- the polymerization solvent is not particularly limited as long as it is a solvent that does not participate in the polymerization reaction and is compatible with the polymer.
- ester compounds such as ethyl acetate, ketone compounds such as methyl ethyl ketone and cyclohexanone, and non-polar solvents or low-polar solvents such as aliphatic, aromatic or alicyclic hydrocarbon compounds such as hexane and toluene.
- non-polar solvents or low-polar solvents such as aliphatic, aromatic or alicyclic hydrocarbon compounds such as hexane and toluene.
- solvents can be used alone or as a mixed solvent of two or more kinds.
- radical polymerization initiator examples include azobisisobutyronitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexanecarbonitrile, azobis-2-amidinopropane / hydrochloride, potassium peroxodisulfate, and ammonium peroxodisulfate.
- T-Butylhydroperoxide di-t-butylcumenhydroperoxide peroxide, acetyl peroxide, benzoyl peroxide, lauroyl peroxide and the like.
- the molecular weight of the polymer used in the adhesive composition of the present invention is 35,000 to 110,000, preferably 55,000 to 80,000 in terms of weight average molecular weight.
- the molecular weight distribution (PDI) of the polymer according to the present invention is preferably 1.0 to 5.0, more preferably 1.0 to 4. In terms of the ratio of weight average molecular weight / number average molecular weight (Mw / Mn). 0, most preferably 1.0 to 3.0.
- the weight average molecular weight and the number average molecular weight are values obtained by converting data measured by gel permeation chromatography (GPC) using THF as a solvent based on the molecular weight of polymethylmethacrylate used as a standard.
- weight average molecular weight means the polystyrene-equivalent weight average molecular weight (Mw) measured by gel permeation chromatography (GPC).
- the mixing ratio of the component (A) and the component (B) is not particularly limited, but is preferably 0.1 to 80 parts by mass of the component (B) with respect to 100 parts by mass of the component (A), and 1 to 50 parts by mass. Is more preferable, and 1 to 30 parts by mass is particularly preferable.
- the component (C) that can be used in the present invention include a photoradical polymerization initiator, an organic peroxide, and the like.
- photo-curing, heat-curing or redox-curing can be selected by selecting the component (C) of the present invention. For example, if you want to impart "photocurability" to the adhesive composition, you may select a photoradical initiator, and if you want to impart "curing by heat curing or redox reaction", you may select an organic peroxide. ..
- the blending amount of the component (C) is not particularly limited, but the component (C) is added in an amount of 0.01 part by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the component (A). Is preferable.
- the component (C) is 0.01 parts by mass or more, the curability is excellent, and when it is less than 10 parts by mass, the storage stability of the adhesive composition can be improved. More preferably, 0.04 parts by mass or more and 8 parts by mass or less are added, and more preferably 0.06 parts by mass or more and 6 parts by mass or less are added.
- the photoradical initiator used in the present invention as the component (C) is not limited as long as it is a compound that generates radicals by irradiating it with active energy rays.
- Examples of the component (C) include an acetophenone-based photoradical initiator, a benzoin-based photoradical initiator, a benzophenone-based photoradical initiator, a thioxanthone-based photoradical initiator, an acylphosphine oxide-based photoradical initiator, and a titanosen-based photoradical initiator.
- Examples thereof include an initiator, and among these, an acetophenone-based photoradical initiator and an acylphosphine oxide-based photoradical initiator are preferable from the viewpoint of excellent photocurability. Further, these may be used alone or in combination of two or more.
- acetophenone-based photoradical initiator examples include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyl dimethyl ketal, and 4- (2-hydroxyethoxy) phenyl- (2-).
- acylphosphine oxide-based photoradical initiator examples include bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and the like. , Not limited to this.
- the organic peroxide which is the component (C) used in the present invention is a compound in which radical species are generated by heating at 50 ° C. or higher or a redox reaction.
- the redox reaction is preferable because it can generate radical species at room temperature.
- the component (C) is not particularly limited, but for example, methyl ethyl ketone peroxide, cyclohexanone peroxide, 3,3,5-trimethylcyclohexanone peroxide, methylcyclohexanone peroxide, methylacetate acetate peroxide, and acetylacetone peroxide.
- Ketone peroxide compounds such as 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t-butylperosiki) cyclohexane, 2,2-bis (t-butylperoxy) ) Peroxyketal compounds such as octane, n-butyl-4,4-bis (t-butylperoxy) valerate, 2,2-bis (t-butylperoxy) butane; t-butylhydroperoxide, cumenhydro Hydropers such as peroxide, diisopropylbenzene hydroperoxide, p-menthan hydroperoxide, 2,5-dimethylhexane-2,5-dihydroperoxide, 1,1,3,3-tetramethylbutylhydroperoxide, etc.
- Oxide compounds di-butyl peroxide, t-butyl cumyl peroxide, dicumyl peroxide, ⁇ , ⁇ '-bis (t-butylperoxy-m-isopropyl) benzene, 2,5-dimethyl-2,5 Dialkyl peroxide compounds such as -di (t-butylperoxy) hexane, 2,5-dimethyl-2,5-di (t-butylperoxy) hexin-3; acetyl peroxide, isobutyryl peroxide, octanoyl Peroxide, decanoyl peroxide, lauroyl peroxide, 3,5,5-trimethylhexanoyl peroxide, succinic acid peroxide, benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, m-toroil peroxide, etc.
- Diacyl peroxide compounds diisopropyl peroxy dicarbonate, di-2-ethylhexyl peroxy dicarbonate, din-propyl peroxy dicarbonate, bis- (4-t-butylcyclohexyl) peroxy dicarbonate, dimyristyl peroxy Dicarbonate, di2-ethoxyethylperoxydicarbonate, dimethoxyisopropylperoxydicarbonate, di (3-methyl-3-methoxybutyl) peroxydicarbonate, diallyl peroxydicarbonate, etc.
- -Oxydicarbonate compounds t-butylperoxyacetate, t-butylperoxyisobutyrate, t-butylperoxypivalate, t-butylperoxyneodecanoate, cumylperoxyneodecanoate, t- Butyl-2-ethylperoxyhexanoate, t-butylperoxy-3,5,5-trimethylhexanoate, t-butylperoxylaurate, t-butylperoxybenzoate, dit-butylperoxyisophthalate , 2,5-Dimethyl-2,5-di (benzoylperoxy) hexane, t-butylperoxymaleic acid, t-butylperoxyisopropyl carbonate, cumylperoxyoctate, t-hexylperoxyneodecano Peroxyester compounds such as ate, t-hexyl peroxypiva
- organic peroxides may be used alone or in combination of two or more.
- a dialkyl peroxide compound, a peroxydicarbonate compound, and a peroxyester compound are preferably used from the viewpoint of curability.
- examples of the organic peroxide suitable for the redox reaction include a dialkyl peroxide compound.
- a curing accelerator can be added for the purpose of promoting the redox reaction.
- the curing accelerator is not particularly limited, but preferably saccharin (o-benzoixulfimide), a hydrazine-based compound, an amine compound, a mercaptan compound, a metal organic compound, or the like is used.
- the curing accelerator may be used alone or in combination of two or more. It is more preferable to use them together because the curing promoting effect is good.
- hydrazine-based compound examples include 1-acetyl-2-phenylhydrazine, 1-acetyl-2 (p-tolyl) hydrazine, 1-benzoyl-2-phenylhydrazine, 1- (1', 1', 1'.
- acetyl-2-phenylhydrazine 1,5-diphenyl-carbohydrazine, 1-formyl-2-phenylhydrazine, 1-acetyl-2- (p-bromophenyl) hydrazine, 1-acetyl-2- ( Examples thereof include p-nitrophenyl) hydrazine, 1-acetyl-2- (2'-phenylethyl hydrazine), ethyl carbazate, p-nitrophenyl hydrazine and p-trisulfonyl hydrazine.
- amine compound examples include heterocyclic secondary amines such as 2-ethylhexylamine, 1,2,3,4-tetrahydroquinone and 1,2,3,4-tetrahydroquinaldine; quinoline, methylquinolin and quinaldine.
- heterocyclic secondary amines such as 2-ethylhexylamine, 1,2,3,4-tetrahydroquinone and 1,2,3,4-tetrahydroquinaldine
- quinoline methylquinolin and quinaldine.
- Heterocyclic tertiary amines such as quinoxalin phenazine; aromatic tertiary amines such as N, N-dimethyl-para-toluidine, N, N-dimethyl-anisidine, N, N-dimethylaniline; 1,2,4 -Examples include azole compounds such as triazole, oxazole, oxadiazole, thiazole, benzotriazole, hydroxybenzotriazole, benzoxazole, 1,2,3-benzothiazole and 3-mercaptobenzotrizole.
- azole compounds such as triazole, oxazole, oxadiazole, thiazole, benzotriazole, hydroxybenzotriazole, benzoxazole, 1,2,3-benzothiazole and 3-mercaptobenzotrizole.
- Examples of the mercaptan compound include n-dodecyl mercaptan, ethyl mercaptan, butyl mercaptan, tris-[(3-mercaptopropionyloxy) -ethyl] -isocyanurate, pentaerythritol tetrakis (3-mercaptopropionate), and dipenta.
- Examples thereof include erythritol hexakis (3-mercaptopropionate), trimethylolpropanthris (3-mercaptopropionate), trimethylolpropanthrthioglycolate, pentaerythritol tetrakisthioglycolate and the like.
- metal organic compound examples include pentadione iron, pentadione cobalt, cobalt neodecanoate, pentadione copper, propylene diamine copper, ethylene diamine copper, neodecanoate copper, iron naphthate, nickel naphthate, cobalt naphthate, copper naphthate, and copper octate. , Iron hexoate, iron propionate, acetylacetone vanadium and the like.
- the adhesive composition of the present invention can be used as a one-component composition, but it can also be used as a two-component composition.
- a two-component composition it is preferable that one liquid contains the radical polymerization initiator of the component (C) and the other liquid contains a metal organic compound.
- the two liquids can be mixed or applied separately and then contacted and cured.
- the components other than the radical polymerization initiator and the metal organic compound of the component (C) can be divided at an arbitrary ratio and included in any of the liquids.
- adhesive aids such as silane coupling agents, thickeners, elastomers, core-shell polymers, reactive diluents, non-reactive diluents or solvents, antioxidants, as long as the object of the present invention is not impaired.
- Light stabilizers, fillers, tackifiers such as tack fire, vinyl aromatic compounds, paraffins, non-reactive colorants, phosphates, rubbery polymer fine particles, storage stabilizers such as BHT, plasticizers, dyes.
- Pigments, flame retardants, sensitizers, heavy metal deactivators, ion trapping agents, emulsifiers, water dispersion stabilizers, defoaming agents, mold release agents, leveling agents, waxes, leology control agents, surfactants and other additives May be blended in an appropriate amount.
- silane coupling agent examples include 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropylmethyldipropyloxysilane, and 3-glycidoxypropyldimethyl.
- amino group-containing silane coupling agent such as N- ⁇ - (aminoethyl) - ⁇ -aminopropyltrimethoxysilane, ⁇ -aminopropyltriethoxysilane, N-phenyl- ⁇ -aminopropyltrimethoxysilane, etc.
- amino group-containing silane coupling agent such as N- ⁇ - (aminoethyl) - ⁇ -aminopropyltrimethoxysilane, ⁇ -aminopropyltriethoxysilane, N-phenyl- ⁇ -aminopropyltrimethoxysilane, etc.
- examples thereof include ⁇ -mercaptopropyltrimethoxysilane and ⁇ -chloropropyltrimethoxysilane. These may be used alone or in combination of two or more.
- polybutyl methacrylate having a molecular weight of about 10,000 to about 40,000 is effective.
- the viscosity of the adhesive composition can be increased to a viscosity like a viscous syrup with better coatability.
- Such a thickener can generally be used in an amount of about 50% by mass or less based on the total mass of the adhesive composition.
- Elastomers can be used in the adhesive composition of the present invention.
- the elastomeric material can improve the fracture toughness of the cured product of the adhesive composition. For example, it may be beneficial when adhering rigid, high yield strength materials (eg, metal substrates that do not mechanically absorb energy as easily as other materials, such as flexible polymeric substrates).
- Such additives can generally be used in an amount of about 50% by mass or less based on the total mass of the adhesive composition.
- a polymer substance having rubber-like elasticity at room temperature is preferable, and one that can be dissolved or dispersed in a polymerizable vinyl monomer is preferable.
- elastomers examples include polybutadiene, (meth) acrylonitrile-butadiene- (meth) acrylic acid copolymer, (meth) acrylonitrile-butadiene-methyl (meth) acrylate copolymer, and methyl (meth) acrylate-butadiene-styrene.
- Butadiene (co) polymers such as copolymer (MBS), styrene-butadiene, (meth) acrylonitrile-butadiene rubber (NBR), various synthetic rubbers such as linear polyurethane, natural rubber, various thermoplastic elastomers, etc. Can be mentioned.
- MVS copolymer
- NBR acrylonitrile-butadiene rubber
- various synthetic rubbers such as linear polyurethane, natural rubber, various thermoplastic elastomers, etc.
- One or more of these 35,000 to 110,000 elastomers may be used as long as there is no problem in compatibility.
- the core-shell polymer can also be used to improve the coatability and flow properties of the adhesive composition.
- the improved coatability and flow properties are the undesired stringing that remains when the adhesive composition is dispensed from a syringe-type coater or sagging after the adhesive composition has been applied to a vertical surface. It can be confirmed by reducing the sag).
- the core-shell polymer is generally about 5% by mass or more, about 10% by mass or more, or about 20% by mass or more, about 50% by mass or less, about 40% by mass or less, or about 30% by mass, based on the total mass of the adhesive composition. It can be added in an amount of mass% or less.
- a reactive diluent may be added.
- Suitable reactive diluents include 1,4-dioxo-2-butene functional compounds and aziridine compounds.
- Non-reactive diluents or solvents eg acetone, methyl ethyl ketone, ethyl acetate, N-methylcaprolactam, etc.
- non-reactive colorants eg carbon black, polyethylene, hollow glass / ceramic beads, silica, titanium dioxide, etc.
- fillers eg carbon black, polyethylene, hollow glass / ceramic beads, silica, titanium dioxide, etc.
- Various optional additives can be added in amounts that do not essentially reduce the rate of polymerization of the monomer or the desired properties of the adhesive cured product.
- antioxidants including a polymerization inhibitor can be used for the purpose of improving storage stability.
- Antioxidants include hydroquinone, hydroquinone monomethyl ether, 2,6-ditershally butyl-p-cresol, 2,2'-methylenebis (4-methyl-6-tershally butylphenol), triphenylphosphite, phenothiazine and N. -Isopropyl-N'-phenyl-p-phenylenediamine and the like can be mentioned.
- the amount of the antioxidant used is preferably 0.001 to 3 parts by mass, more preferably 0.01 to 1 part by mass, based on 100 parts by mass of the radically polymerizable compound (A). If it is 0.001 part by mass or more, the effect is obtained, and if it is 3 parts by mass or less, the adhesiveness is improved.
- an antioxidant and a light stabilizer is preferable for improving the weather resistance of the adhesive composition.
- Commercially available products can be used as the antioxidant and the light stabilizer.
- the adhesive composition of the present invention adheres a low surface energy plastic or polymer substrate which is a poorly adhesive material without using complicated surface treatment techniques such as flame treatment, itro treatment, corona discharge, and primer treatment. Especially useful in some cases.
- the "low surface energy plastic” in the present disclosure refers to olefin materials such as polyethylene (PE), polypropylene (PP), cycloolefin polymer (COP), cycloolefin copolymer (COC), polyacetal (POM), nylon 6 (PA6).
- PPE Polyethylene terephthalate
- PBT Polybutylene terephthalate
- PDMS Polydimethylsilicone
- PEEK Polyether ether ketone
- PPE Modified polyphenylene ether
- PPS Polyphenylene sulfide
- PMP Polymethylpentene
- LCP liquid crystal polyester
- ABS acrylonitrile-butadiene-styrene
- PTFE polytetrafluoroethylene
- EPM Polymer blends with elastomers such as ethylene-propylene-diene rubber (EPDM) can be mentioned.
- EPDM ethylene-propylene-diene rubber
- Examples of the "high surface energy plastic” in the present disclosure include polyvinyl chloride (PVC), polycarbonate (PC), and polymethylmethacrylate (PMMA).
- the two-component adhesive of the present disclosure can be advantageously used for a substrate containing an elastomeric modified product that easily adsorbs oxygen and a polymer blend of the elastomer.
- Elastomer substrate can be mentioned.
- the present invention is not limited to this extent, and the composition may be used to bond any thermoplastic resin as well as wood, ceramics, concrete and primed metals, fiber reinforced plastics.
- the adhesive composition of the present invention can be produced by a conventionally known method. For example, by blending a predetermined amount of the components (A) to (C) and mixing them at a temperature of preferably 10 to 70 ° C., preferably for 0.1 to 5 hours, using a mixing means such as a mixer. Can be manufactured. Moreover, it is preferable to manufacture in a light-shielded environment.
- ⁇ Applying method> As a method of applying the adhesive composition of the present invention to an adherend, a known method of a sealant or an adhesive is used. For example, methods such as dispensing, spraying, inkjet, screen printing, gravure printing, dipping, and spin coating using an automatic coating machine can be used.
- the adhesive composition of the present invention is preferably liquid at 25 ° C. from the viewpoint of coatability.
- the liquid at 25 ° C. indicates a viscosity of 0.01 to 1000 Pa ⁇ s with a cone plate type viscometer at 25 ° C.
- photo-curing, heat-curing or redox-curing can be selected by selecting the component (C) of the present invention. For example, if you want to impart "photocurability" to the adhesive composition, you may select a photoradical initiator, and if you want to impart "curing by heat curing or redox reaction", you may select an organic peroxide. ..
- the curing conditions when the adhesive composition of the present invention is imparted with photocurability are not particularly limited as a light source for curing the adhesive composition of the present invention by irradiating it with light such as ultraviolet rays or visible light.
- light such as ultraviolet rays or visible light.
- the irradiation amount of light irradiation is preferably 500 mJ / cm 2 or more, and more preferably 1000 mJ / cm 2 or more from the viewpoint of the characteristics of the cured product.
- the upper limit is not particularly limited, but is, for example, 10000 mJ / cm 2 or less.
- the curing conditions when heat curability is imparted to the adhesive composition of the present invention are not particularly limited, but for example, a temperature of 45 ° C. or higher and lower than 200 ° C. is preferable, and more preferably 50 ° C. or higher and lower than 150 ° C. Is.
- the curing time is not particularly limited, but in the case of a temperature of 45 ° C. or higher and lower than 200 ° C., it is preferably 3 minutes or more and less than 5 hours, and more preferably 10 minutes or more and 3 hours or less.
- a cured product obtained by curing the adhesive composition of the present invention is also a part of the embodiment of the present invention.
- a bonded body bonded with the adhesive composition of the present invention is also a part of an embodiment of the present invention.
- the adhesive composition is applied onto a plastic base material, and a cured layer is provided directly on the base material or between the base materials.
- Specific applications of the adhesive composition of the present invention include switch parts for automobiles, head lamps, internal engine parts, electrical components, drive engines, brake oil tanks, front hoods, fenders, etc. in the field of automobiles and transport machines. Adhesion of body panels such as doors and windows; Adhesion of liquid crystal displays, organic electroluminescence, light emitting diode displays, field emission displays, etc.
- Video discs, CDs, DVDs, MDs, pickups in the recording field Adhesion of lenses, hard disk peripherals (members for spindle motors, members for magnetic head actuators, etc.), Blu-ray discs, etc .; Conductive adhesives, anisotropic conductive adhesives, interlayer adhesives for multilayer substrates including build-up substrates, solder resists, etc .; In the battery field, lithium batteries, manganese batteries, alkaline batteries, nickel-based batteries, fuel cells, silicon, etc.
- the resin used in the automobile / transport machine field examples include PP (polypropylene), PE (polyethylene), polyurethane, ABS, phenol resin, CFRP (carbon fiber reinforced plastic), GFRP (glass fiber reinforced plastic) and the like. Is used. In particular, CFRP (carbon fiber reinforced plastic) and GFRP (glass fiber reinforced plastic) are used for the vehicle body.
- the frame of the electrolyte membrane of the fuel cell is made of a difficult-to-adhere material such as PP or PEN.
- the bonding points of the camera module are between the image sensor such as CMOS and CCD and the substrate, between the cut filter and the substrate, between the substrate and the housing, between the housing and the cut filter, and the housing. And between the lens unit and the like.
- the material of the housing and the lens unit is made of a difficult-to-adhere material such as LCP (liquid crystal polymer), PPS (polyphenylene sulfide), and polycarbonate.
- each compounding substance is shown in parts by mass. Details of each compounded substance are as follows. IBOX: Isobornyl acrylate, Commercial product EHA: 2-Ethylhexyl acrylate, Commercial product TPO: Diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide, Commercial product
- test methods used in the examples in Tables 1 to 4 are as follows.
- the base materials used were 2.0 mm thick ⁇ 25 mm ⁇ 100 mm in size. Commercially available products were used for all the base materials. -The second adherend was made of 2.0 mm thick ⁇ 25 mm ⁇ 100 mm size polycarbonate (PC). A commercially available product was used as the base material.
- PC polycarbonate
- PC polycarbonate
- the tensile shear strength (tensile shear adhesive strength) was measured and used as the tensile shear strength. The measurement was carried out in an environment of a temperature of 23 ° C. and a tensile speed of 100 mm / min.
- the adhesive composition of the present invention is a low surface energy resin base material, for example, polyethylene (PE), polypropylene (PP), polytetrafluoroethylene (PTFE), polyacetal (POM), nylon 6 (PA6). ), Polyethylene terephthalate (PET), Polybutylene terephthalate (PBT), Polydimethylsilicone (PDMS), Polyether ether ketone (PEEK), Modified polyphenylene ether (PPE), Polyphenylene sulfide (PPS), Cycloolefin polymer (COP), Cycloolefin copolymer (COC), polymethylpentene (PMP), liquid crystal polyester (LCP), high surface energy resin base material, for example, polyvinyl chloride (PVC), polycarbonate (PC), polymethylmethacrylate (PMMA), etc.
- PE polyethylene
- PP polypropylene
- PTFE polytetrafluoroethylene
- POM polyacetal
- nylon 6 PA6
- PPE Poly
- the adhesiveness is excellent to various plastic resins.
- the adhesive composition of the present invention can be adhered to a wider range of substrates and can take a wider variety of composition forms.
- a polymer having a repeating unit derived from a compound represented by the formula (I) of the present invention is not used, or when another polymer or the like is used, excellent adhesiveness to the above-mentioned various plastic resins is obtained. Cannot be obtained.
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Abstract
Description
(1)下記(A)~(C)を含有する接着性組成物。
(A) ラジカル重合性化合物
(B) 式(I)
で表される重合性化合物由来の繰り返し単位を有する、重量平均分子量が35,000~110,000のポリマー
(C) ラジカル重合開始剤
(2)式(I)中、Yがアクリロイル基又はメタクリロイル基である(1)に記載の接着性組成物。
(3)式(I)で表される重合性化合物由来の繰り返し単位を有するポリマーが、式(I)で表される重合性化合物由来の繰り返し単位と、(メタ)アクリル酸エステル由来の繰り返し単位を有するコポリマーである、(1)または(2)に記載の接着性組成物。
(4)接着性組成物が、プラスチック基材用の接着性組成物である(1)~(3)のいずれかに記載の接着性組成物。
(5)(C) ラジカル重合開始剤が、光重合開始剤である、(1)~(4)のいずれかに記載の接着性組成物。
(6)(C) ラジカル重合開始剤が、有機過酸化物である、(1)~(4)のいずれかに記載の接着性組成物。
(7)接着性組成物がコーティング剤である、(5)に記載の接着性組成物。
(8)コーティング剤がプライマーである、(7)に記載の接着性組成物。
(9)接着性組成物が接着剤である、(5)または(6)に記載の接着性組成物。
(10)(1)~(9)のいずれかに記載の接着性組成物を、プラスチック基材上に塗布し、硬化させた層を基材上又は基材間に設けた成形体。
ラジカル重合性化合物としては、特に限定されないが、ビニル基、アリル基、(メタ)アクリロイル基などの不飽和2重結合を有する基を有するモノマーや、そのオリゴマー、ポリマーなどを用いることができる。なお、本発明において、「(メタ)アクリロイル基」は、「アクリロイル基」及び/又は「メタクリロイル基」を意味する。
上記(メタ)アクリレート、(メタ)アクリルアミド以外のラジカル重合性化合物としては、融点、粘度又は屈折率などの目的とする物性に応じて適宜選定すればよく、特に限定されるものではないが、具体的には、以下のものが挙げられる。
(B)成分は、式(I)
で表される重合性化合物由来の繰り返し単位を有するポリマーであり、重量平均分子量が35,000~110,000のポリマーである。
式(I)で表される重合性化合物由来の繰り返し単位を有するポリマーは、さらに式(I)以外の他のラジカル重合性化合物に由来する繰返し単位として、(メタ)アクリル酸エステル由来の繰り返し単位を有することもできる。
式(I)中、X1、X2は、それぞれ独立に、C7~C20のアルキル基又はC7~C20のアルコキシ基を表す。
直鎖のものとしては、n-ヘプチル基、n-オクチル基、n-ノニル基、n-デシル基、n-ドデシル基、n-トリデシル基、n-テトラデシル基、n-ヘキサデシル基、n-オクタデシル基、n-エイコシル基等が挙げられる。
分岐鎖のものとしては、1,1,2,2-テトラメチルプロピル基、1,1,3-トリメチルブチル基、1-エチルペンチル基、1,1,3,3-テトラメチルブチル基、2,2,3,3-テトラメチルブチル基、1,2,4-トリメチルペンチル基、2,4,4-トリメチルペンチル基、2,2,4-トリメチルペンチル基、1-エチル―4-メチルペンチル基、3-エチル-3-メチルペンチル基、3-エチル-4-メチルペンチル基、1-エチル―1-メチルペンチル基、1,1-ジメチルヘキシル基、3,3-ジメチルヘキシル基、4,4-ジメチルヘキシル基、2-エチルヘキシル基、3-エチルへキシル基、6-メチルヘプチル基、1,3,5-トリメチルヘキシル基、1,1,3-トリメチルヘキシル基、1-ブチル―1-メチルへプチル基、1-メチルへプチル基、1-メチル―1-オクチルウンデシル基等が挙げられる。
X1及びX2における、C7~C20のアルコキシ基としては、直鎖のものも、分枝鎖のものも、好ましく用いることができる。
直鎖のものとしては、n-ヘプチルオキシ基、n-オクチルオキシ基、n-ノニルオキシ基、n-デシルオキシ基、n-ドデシルオキシ基、n-トリデシルオキシ基、n-テトラデシルオキシ基、n-ヘキサデシル基オキシ、n-オクタデシルオキシ基、n-エイコシルオキシ基等が挙げられる。
分岐鎖のものとしては、1,1,2,2-テトラメチルプロピルオキシ基、1,1,3-トリメチルブチルオキシ基、1-エチルペンチルオキシ基、1,1,3,3-テトラメチルブチルオキシ基、2,2,3,3-テトラメチルブチルオキシ基、1,2,4-トリメチルペンチルオキシ基、2,4,4-トリメチルペンチルオキシ基、2,2,4-トリメチルペンチルオキシ基、1-エチル―4-メチルペンチルオキシ基、3-エチル-3-メチルペンチルオキシ基、3-エチル-4-メチルペンチルオキシ基、1-エチル―1-メチルペンチルオキシ基、1,1-ジメチルヘキシルオキシ基、3,3-ジメチルヘキシルオキシ基、4,4-ジメチルヘキシルオキシ基、2-エチルヘキシルオキシ基、3-エチルへキシルオキシ基、6-メチルヘプチルオキシ基、1,3,5-トリメチルヘキシルオキシ基、1,1,3-トリメチルヘキシルオキシ基、1-ブチル―1-メチルへプチルオキシ基、1-メチルへプチルオキシ基、1-メチル―1-オクチルウンデシルオキシ基等が挙げられる。
Z1、Z2におけるC1~C3アルキレン基としては、メチレン、エチレン、プロパン-1,3-ジイル等が挙げられる。
有機基としては、化学的に許容され、本発明の効果を有する限りにおいて特に制限されない。有機基としては、メチル基、エチル基、n-プロピル基、i-プロピル基、n-ブチル基、s-ブチル基、i-ブチル基、t-ブチル基、n-ペンチル基、n-ヘキシル基などのC1~C6アルキル基や、フェニル基、ナフチル基などのC6~C10アリール基や、メトキシ基、エトキシ基、n-プロポキシ基、i-プロポキシ基、n-ブトキシ基、s-ブトキシ基、i-ブトキシ基、t-ブトキシ基などのC1~C6アルコキシ基や、クロロメチル基、クロロエチル基、トリフルオロメチル基、1,2-ジクロロ-n-プロピル基、1-フルオロ-n-ブチル基、パーフルオロ-n-ペンチル基などのC1~C6ハロアルキル基等が挙げられる。
ハロゲノ基としては、フルオロ基、クロロ基、ブロモ基、イオド基が挙げられる。
本発明においては、Yとしては、アクリロイル基、メタクリロイル基が好ましい。
(メタ)アクリル酸エステルとは、無置換の又は置換基を有していてもよいC1~C18アルキル(メタ)アクリル酸エステルであることが好ましい。
アルキル(メタ)アクリル酸エステルのアルキル部位は、直鎖、分岐、環状(脂環族)のいずれでもよく、好ましくは直鎖又は分岐のアルキル基である。直鎖又は分岐のアルキル(メタ)アクリル酸エステルの場合、アルキル部位は好ましくはC1~C12である。
脂肪族基としては、メチル基、エチル基等のアルキル基、ビニル基、アリル基等のアルケニル基、エチニル基等のアルキニル基等が挙げられる。
極性基としては、水酸基、アミノ基、テトラヒドロフルフリル基等が挙げられる。芳香族基は、1個又はそれ以上の環を含む、芳香族炭化水素基である。たとえば、フェニル基、ナフチル基等が挙げられる。
ヘテロ芳香族基は、ヘテロ原子としてO 、S 、又はNを1個以上有する芳香族基である。たとえば、ピリジニル基、チエニル基、フリル基、ベンズイミダゾリル基等が挙げられる。
本発明に用いる(B)成分が、式(I)で表される重合性化合物由来の繰り返しおよび(メタ)アクリル酸エステル由来の繰り返し単位を有するものである場合、即ち式(I)で表される重合性化合物由来の繰り返し単位と(メタ)アクリル酸エステルに由来する繰返し単位からなるコポリマーである場合には、コポリマー中、式(I)で表される重合性化合物由来の繰り返し単位と、(メタ)アクリル酸エステルに由来する繰返し単位の含有量は特に制限されない。式(I)で表される重合性化合物由来の繰り返し単位と、(メタ)アクリル酸エステルに由来する繰返し単位は、モル比で99.5:0.5~60:40、99:1~70:30、98:2~75:25、95:5~80:20、20:80~:5:95、40:60~0.5:99.5等の範囲を選択することができる。
その他のラジカル重合性化合物由来の繰返し単位とは、式(I)で表される重合性化合物由来の繰り返し単位および(メタ)アクリル酸エステル由来の繰り返し単位以外の、1種又は2種以上のラジカル重合性化合物由来の繰り返し単位を意味する。
式(I)で表される重合性化合物及び(メタ)アクリル酸エステル以外の重合性化合物としては、融点、粘度又は屈折率などの目的とする物性に応じて適宜選定すればよく、特に限定されるものではないが、具体的には、以下のものが挙げられる。
本発明に用いる重合性化合物である式(I)及び式(II)は、実施例の方法や他の公知の方法により合成することができる。
たとえば、式(I)のYがアクリル基又はメタクリル基の場合は、以下の方法により製造することができる。
式(I’)
溶媒としては、N,N-ジメチルホルムアミド(DMF)、N,N-ジメチルアセトアミド等のアミド系溶媒、テトラヒドロフラン(THF)、1,2-ジメトキシエタン、ジエチルエーテル、メチルセルソルブ等のエーテル系溶媒、ベンゼン、トルエン、キシレン、クロルベンゼン、ジクロロベンゼン、ベンゾニトリル等の芳香族炭化水素、ペンタン、ヘキサン、オクタン、シクロヘキサン等の飽和炭化水素、ジクロロメタン、クロロホルム、四塩化炭素、1,2-ジクロロエタン等のハロゲン化炭化水素等が挙げられ、これらの1種又は2種以上の混合溶媒を使用することができる。
塩基としては、トリエチルアミン、トリブチルアミン等の脂肪族アミン、ピリジン、N-エチルピリジン、N,N-ジメチルアニリン、N,N-ジメチルアミノピリジン等の芳香族アミン、ナトリウムエチラート、ナトリムメチラート等の金属アルコキシド等の有機塩基や、水酸化リチウム、水酸化ナトリウム、水酸化カリウム、炭酸リチウム、炭酸ナトリウム、炭酸カリウム、水酸化カルシウム、水酸化マグネシウム、炭酸カルシウム、炭酸マグネシウム、炭酸水素ナトリウム等のアルカリ金属又はアルカリ土類金属の水酸化物、アルカリ金属又はアルカリ土類金属の炭酸塩等の無機塩基を用いることができる。
反応温度は、-50℃~200℃である。
本発明に用いるポリマーは、式(I)で表される重合性化合物のみ、あるいは、式(I)で表される重合性化合物と(メタ)アクリル酸エステルを重合したものであれば、特に制限なく使用することができる。重合反応は、特に制限されず、ポリアクリレート等を合成する公知の方法であってもよく、例えば、ラジカル重合、アニオン重合、カチオン重合、開環重合、配位重合等を挙げることができる。実施例にその一例を示す。
たとえば、式(I)のYがアクリル基又はメタクリル基である化合物と(メタ)アクリル酸エステルの化合物をラジカル重合する場合は、式(I)又は式(II)で表される重合性化合物と(メタ)アクリル酸エステルの化合物を溶媒中で、ラジカル重合開始剤の存在下で、加熱又は光照射して重合反応を行う。
重合溶媒は、重合反応に関与せず、かつ重合体と相溶性のある溶媒であれば特に制限されず、具体的には、ジエチルエーテル、テトラヒドロフラン(THF)、ジオキサン、トリオキサンなどのエーテル系化合物や、酢酸エチルなどのエステル系化合物や、メチルエチルケトンやシクロヘキサノンなどのケトン系化合物や、ヘキサンやトルエンなどの脂肪族、芳香族又は脂環式炭化水素化合物などの非極性溶媒又は低極性溶媒を例示することができる。これらの溶媒は、1種単独で、又は2種以上の混合溶媒として用いることができる。
ラジカル重合開始剤としては、たとえば、アゾビスイソブチロニトリル、アゾビス-2,4-ジメチルバレロニトリル、アゾビスシクロヘキサンカルボニトリル、アゾビス-2-アミジノプロパン・塩酸塩、ペルオキソ二硫酸カリウム、ペルオキソ二硫酸アンモニウム、t-ブチルヒドロペルオキシド、過酸化ジ-t-ブチルクメンヒドロペルオキシド、過酸化アセチル、過酸化ベンゾイル、過酸化ラウロイルなどが挙げられる。
また、本発明に係るポリマーの分子量分布(PDI)は、重量平均分子量/数平均分子量(Mw/Mn)の比で、好ましくは1.0~5.0、より好ましくは1.0~4.0、最も好ましくは1.0~3.0である。
なお、重量平均分子量及び数平均分子量は、THFを溶媒とするゲルパーミエーションクロマトグラフィ(GPC)にて測定したデータを、標準として使用するポリメタクリル酸メチルの分子量に基づいて換算した値である。
東ソー株式会社製EcoSEC HLC-8320GPC
[GPC測定件]
GPCカラム:TSK gel SuperMultipore HZ-M
流量:0.35ml/min
注入量:40μm
カラム温度:40℃
システム温度:40℃
溶離液:テトラヒドロフラン
(A)成分と(B)成分の配合割合は、特に制限はないが、(A)成分100質量部に対して、(B)成分0.1~80質量部が好ましく、1~50質量部がより好ましく、1~30質量部が特に好ましい。
本発明で使用することができる(C)成分としては、光ラジカル重合開始剤または有機過酸化物等が挙げられる。本発明の接着性組成物の硬化形態は、本発明の(C)成分の選択により、光硬化、加熱硬化又はレドックス硬化を選択することが可能である。例えば、接着性組成物に関して「光硬化性」を付与したい場合は、光ラジカル開始剤を選択し、「加熱硬化又はレドックス反応による硬化」を付与したい場合は、有機過酸化物を選択すればよい。
本発明に対し、本発明の目的を損なわない範囲で、シランカップリング剤等の接着助剤、増粘剤、エラストマー、コアシェルポリマー、反応性希釈剤、非反応性希釈剤又は溶媒、酸化防止剤、光安定剤、充填材、タッキファイヤー等の粘着付与剤、ビニル芳香族化合物、パラフィン類、非反応性着色剤、リン酸塩、ゴム状ポリマー微粒子、BHT等の保存安定剤、可塑剤、染料、顔料、難燃剤、増感剤、重金属不活性剤、イオントラップ剤、乳化剤、水分散安定剤、消泡剤、離型剤、レベリング剤、ワックス、レオロジーコントロール剤、界面活性剤等の添加剤を適量配合しても良い。
本発明の接着性組成物は、火炎処理、イトロ処理、コロナ放電、プライマー処理などの複雑な表面処理技術を使用せずに、難接着性材料である低表面エネルギープラスチック又はポリマー基材を接着する場合に特に有用である。本開示における「低表面エネルギープラスチック」とは、ポリエチレン(PE)、ポリプロピレン(PP)、シクロオレフィンポリマー(COP)、シクロオレフィンコポリマー(COC)などのオレフィン系材料、ポリアセタール(POM)、ナイロン6(PA6)、ポリエチレンテレフタレート(PET)、ポリブチレンテレフタレート(PBT)、ポリジメチルシリコーン(PDMS)、ポリエーテルエーテルケトン(PEEK)、変性ポリフェニレンエーテル(PPE)、ポリフェニレンサルファイド(PPS)、ポリメチルペンテン(PMP)、液晶ポリエステル(LCP)、アクリロニトリル-ブタジエン-スチレン(ABS)、ポリテトラフルオロエチレン(PTFE)などのフッ素化ポリマー、並びにこれらの材料のエラストマー変性体、及びこれらの材料とエチレン-プロピレンゴム(EPM)、エチレン-プロピレン-ジエンゴム(EPDM)などのエラストマーとのポリマーブレンドが挙げられる。本開示における「高表面エネルギープラスチック」とは、ポリ塩化ビニル(PVC)、ポリカーボネート(PC)、ポリメチルメタクリレート(PMMA)が挙げられる。本開示の2液型接着剤は、酸素を吸着しやすいエラストマー変性体及びエラストマーのポリマーブレンドを含む基材に有利に使用することができる。好適なエラストマー変性体及びエラストマーのポリマーブレンドを含む基材として、ポリエチレン、ポリプロピレンなどのポリオレフィンのエラストマー変性体、又はエチレン-プロピレンゴム(EPM)、エチレン-プロピレン-ジエンゴム(EPDM)などのエラストマーとポリエチレン、ポリプロピレンなどのポリマーブレンドを含む、オレフィン系エラストマー基材、特に、ポリプロピレンのエラストマー変性体及びエチレン-プロピレンゴム(EPM)、エチレン-プロピレン-ジエンゴム(EPDM)などのエラストマーとポリプロピレンのポリマーブレンドを含むポリプロピレン系エラストマー基材が挙げられる。しかしながら、本発明はこの程度に限定されず、いかなる熱可塑性樹脂並びに木、セラミック、コンクリート及び下塗りされた金属、繊維強化プラスチックを接着するのに該組成物が使用されてもよい。
本発明の接着性組成物は、従来公知の方法により製造することができる。例えば、(A)成分~(C)成分の所定量を配合して、ミキサー等の混合手段を使用して、好ましくは10~70℃の温度で好ましくは0.1~5時間混合することにより製造することができる。また、遮光環境下で製造することが好ましい。
本発明の接着性組成物を被着体への塗布する方法としては、公知のシール剤や接着剤の方法が用いられる。例えば、自動塗布機を用いたディスペンシング、スプレー、インクジェット、スクリーン印刷、グラビア印刷、ディッピング、スピンコートなどの方法を用いることができる。なお、本発明の接着性組成物は、塗布性の観点から25℃で液状であることが好ましい。なお、25℃で液状とは、25℃におけるコーンプレート型粘度計で0.01~1000Pa・sの粘度を示すものである。
本発明の接着性組成物の硬化形態は、本発明の(C)成分の選択により、光硬化、加熱硬化又はレドックス硬化を選択することが可能である。例えば、接着性組成物に関して「光硬化性」を付与したい場合は、光ラジカル開始剤を選択し、「加熱硬化又はレドックス反応による硬化」を付与したい場合は、有機過酸化物を選択すればよい。
本発明の成形体は、前記の接着性組成物を、プラスチック基材上に塗布し、硬化させた層を基材上又は基材間に直接設けたものである。
本発明の接着性組成物の具体的な用途としては、自動車・輸送機分野では、自動車用のスイッチ部分、ヘッドランプ、エンジン内部品、電装部品、駆動エンジン、ブレーキオイルタンク、フロントフード、フェンダー、ドアなどのボディパネル、ウインドウ等の接着等;フラットパネルディスプレイでは、液晶ディスプレイ、有機エレクトロルミネッセンス、発光ダイオード表示装置、フィールドエミッションディスプレイの接着等;記録分野では、ビデオディスク、CD、DVD、MD、ピックアップレンズ、ハードディスク周辺(スピンドルモータ用部材、磁気ヘッドアクチュエータ用部材など)、ブルーレイディスク等の接着等;電子材料分野では、電子部品、電気回路、電気接点あるいは半導体素子等の封止材料、ダイボンド剤、導電性接着剤、異方性導電性接着剤、ビルドアップ基板を含む多層基板の層間接着剤、ソルダーレジスト等;電池分野では、リチウム電池、マンガン電池、アルカリ電池、ニッケル系電池、燃料電池、シリコン系太陽電池、色素増感型太陽電池、有機太陽電池等の接着等;光部品分野では、光通信システムでの光スイッチ周辺、光コネクタ周辺の光ファイバー材料、光受動部品、光回路部品、光電子集積回路周辺の等の接着剤等;光学機器分野では、カメラモジュール、スチールカメラのレンズ用材料、ファインダプリズム、ターゲットプリズム、ファインダーカバー、受光センサー部、撮影レンズ、プロジェクションテレビの投射レンズ等の接着剤等;インフラ分野では、ガス管、水道管などの接着、ライニング剤、封止、注型、成形、コーティング材等に使用が可能である。
High Resolution ESI-TOF-MS m/z Calcd. for [C31H45NO([M+Na]+)]: 470.3393 found 470.3317.
300mL四つ口フラスコにDOPAA 26.98g、アクリル酸エチル(EA:東京化成品)3.04g、AIBN(東京化成品)0.20gを仕込み、トルエン45gに溶解させた。減圧操作を加えて脱気を行い、窒素雰囲気化で65℃、6時間加熱撹拌した。その後、AIBN 0.10gを加え、80℃で5時間撹拌した。加熱撹拌を停止するとともに反応液をサンプリングし、ゲルパーミエーションクロマトグラフィー測定を行った。反応液をメタノール800mL中に滴下することで粉体化を行った。得られた析出物をろ別し、真空乾燥機にて60℃、減圧による乾燥を行った。収量28.19g、Mw=36,148、Mw/Mn=2.08
300mL四つ口フラスコにDOPAA 26.98g、アクリル酸エチル(EA:東京化成品)3.04g、AIBN(東京化成品)0.17gを仕込み、トルエン45gに溶解させた。減圧操作を加えて脱気を行い、窒素雰囲気化で65℃、6時間加熱撹拌した。その後、AIBN 0.10gを加え、80℃で5時間撹拌した。加熱撹拌を停止するとともに反応液をサンプリングし、ゲルパーミエーションクロマトグラフィー測定を行った。反応液をメタノール800mL中に滴下することで粉体化を行った。得られた析出物をろ別し、真空乾燥機にて60℃、減圧による乾燥を行った。収量26.33g、Mw=46,229、Mw/Mn=2.07
300mL四つ口フラスコにDOPAA 26.98g、アクリル酸エチル(EA:東京化成品)3.04g、AIBN(東京化成品)0.15gを仕込み、トルエン45gに溶解させた。減圧操作を加えて脱気を行い、窒素雰囲気化で65℃、6時間加熱撹拌した。その後、AIBN 0.08gを加え、80℃で5時間撹拌した。加熱撹拌を停止するとともに反応液をサンプリングし、ゲルパーミエーションクロマトグラフィー測定を行った。反応液をメタノール800mL中に滴下することで粉体化を行った。得られた析出物をろ別し、真空乾燥機にて60℃、減圧による乾燥を行った。収量25.98g、Mw=53,810、Mw/Mn=2.11
300mL四つ口フラスコにDOPAA 26.98g、アクリル酸エチル(EA:東京化成品)3.04g、AIBN(東京化成品)0.20gを仕込み、トルエン40.62gに溶解させた。減圧操作を加えて脱気を行い、窒素雰囲気化で65℃、6時間加熱撹拌した。その後、AIBN 0.10gを加え、80℃で5時間撹拌した。加熱撹拌を停止するとともに反応液をサンプリングし、ゲルパーミエーションクロマトグラフィー測定を行った。反応液をメタノール800mL中に滴下することで粉体化を行った。得られた析出物をろ別し、真空乾燥機にて60℃、減圧による乾燥を行った。収量27.82g、Mw=58,078、Mw/Mn=2.20
300mL四つ口フラスコにDOPAA 26.98g、アクリル酸エチル(EA:東京化成品)3.04g、AIBN(東京化成品)0.20gを仕込み、トルエン36.69gに溶解させた。減圧操作を加えて脱気を行い、窒素雰囲気化で65℃、6時間加熱撹拌した。その後、AIBN 0.10gを加え、80℃で5時間撹拌した。加熱撹拌を停止するとともに反応液をサンプリングし、ゲルパーミエーションクロマトグラフィー測定を行った。反応液をメタノール800mL中に滴下することで粉体化を行った。得られた析出物をろ別し、真空乾燥機にて60℃、減圧による乾燥を行った。収量29.01g、Mw=61,128、Mw/Mn=2.10
300mL四つ口フラスコにDOPAA 26.98g、アクリル酸エチル(EA:東京化成品)3.04g、AIBN(東京化成品)0.20gを仕込み、トルエン33.18gに溶解させた。減圧操作を加えて脱気を行い、窒素雰囲気化で65℃、6時間加熱撹拌した。その後、AIBN 0.10gを加え、80℃で5時間撹拌した。加熱撹拌を停止するとともに反応液をサンプリングし、ゲルパーミエーションクロマトグラフィー測定を行った。反応液をメタノール800mL中に滴下することで粉体化を行った。得られた析出物をろ別し、真空乾燥機にて60℃、減圧による乾燥を行った。収量28.87g、Mw=69,610、Mw/Mn=2.20
300mL四つ口フラスコにDOPAA 26.98g、アクリル酸エチル(EA:東京化成品)3.04g、AIBN(東京化成品)0.20gを仕込み、トルエン30.02gに溶解させた。減圧操作を加えて脱気を行い、窒素雰囲気化で65℃、6時間加熱撹拌した。その後、AIBN 0.10gを加え、80℃で5時間撹拌した。加熱撹拌を停止するとともに反応液をサンプリングし、ゲルパーミエーションクロマトグラフィー測定を行った。反応液をメタノール800mL中に滴下することで粉体化を行った。得られた析出物をろ別し、真空乾燥機にて60℃、減圧による乾燥を行った。収量27.31g、Mw=82,555、Mw/Mn=2.38
300mL四つ口フラスコにDOPAA 26.98g、アクリル酸エチル(EA:東京化成品)3.04g、AIBN(東京化成品)0.20gを仕込み、トルエン20.02gに溶解させた。減圧操作を加えて脱気を行い、窒素雰囲気化で65℃、6時間加熱撹拌した。その後、AIBN 0.10gを加え、80℃で5時間撹拌した。加熱撹拌を停止するとともに反応液をサンプリングし、ゲルパーミエーションクロマトグラフィー測定を行った。反応液をメタノール800mL中に滴下することで粉体化を行った。得られた析出物をろ別し、真空乾燥機にて60℃、減圧による乾燥を行った。収量28.11g、Mw=108,606、Mw/Mn=2.94
表1~4に示す量の各成分を遮光環境下で25℃にて撹拌配合し、接着性組成物を得た。
IBOX:アクリル酸イソボルニル、市販品
EHA:アクリル酸2-エチルヘキシル、市販品
TPO:ジフェニル(2,4,6-トリメチルベンゾイル)ホスフィンオキシド、市販品
・第1被着体
高密度ポリエチレン(HDPE)、低密度ポリエチレン(LDPE)、ポリプロピレン(PP)、シクロオレフィンポリマー(COP)、シクロオレフィンコポリマー(COC)、ポリアセタール(POM)、ナイロン6(PA6)、ポリエチレンテレフタレート(PET)、ポリブチレンテレフタレート(PBT)、ポリジメチルシリコーン(PDMS)、ポリエーテルエーテルケトン(PEEK)、変性ポリフェニレンエーテル(PPE)、ポリフェニレンサルファイド(PPS)、ポリメチルペンテン(PMP)、液晶ポリエステル(LCP)、アクリロニトリル-ブタジエン-スチレン(ABS)、ポリテトラフルオロエチレン(PTFE)、ポリ塩化ビニル(PVC)、ポリメチルメタクリレート(PMMA)、ポリスチレン(PS)を用いた。なお、基材は全て2.0mm厚×25mm×100mmサイズを使用した。基材は全て市販品を用いた。
・第2被着体
2.0mm厚×25mm×100mmサイズのポリカーボネート(PC)を使用した。基材は市販品を用いた。
各光硬化性接着性組成物を、それぞれ、100μm厚になるように第1被着体に塗布した。
引張剪断強度(単位:MPa)の測定を行い、引張剪断強度とした。測定は、温度23℃の環境下、引張速度100mm/分で行った。
本発明の接着性組成物は、より幅広い基材への接着が可能であり、より様々な組成物の形態を取ることができる。
なお、本発明の式(I)で表される化合物由来の繰り返し単位を有するポリマーを使用しない場合や、他のポリマー等を使用する場合では、上記の様々なプラスチック樹脂に対して優れた接着性は得られない。
Claims (10)
- 式(I)中、Yがアクリロイル基又はメタクリロイル基である請求項1に記載の接着性組成物。
- 式(I)で表される重合性化合物由来の繰り返し単位を有するポリマーが、
式(I)で表される重合性化合物由来の繰り返し単位と、
(メタ)アクリル酸エステル由来の繰り返し単位
を有するコポリマーである、請求項1または2に記載の接着性組成物。 - 接着性組成物が、プラスチック基材用の接着性組成物である請求項1~3のいずれかに記載の接着性組成物。
- (C) ラジカル重合開始剤が、光重合開始剤である、請求項1~4のいずれかに記載の接着性組成物。
- (C) ラジカル重合開始剤が、有機過酸化物である、請求項1~4のいずれかに記載の接着性組成物。
- 接着性組成物がコーティング剤である請求項5に記載の接着性組成物。
- コーティング剤が、プライマーである請求項7に記載の接着性組成物。
- 接着性組成物が、接着剤である請求項5または6に記載の接着性組成物。
- 請求項1~9のいずれかに記載の接着性組成物を、プラスチック基材上に塗布し、硬化させた層を基材上又は基材間に設けた成形体。
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| WO2023190374A1 (ja) | 2022-03-29 | 2023-10-05 | 日本曹達株式会社 | ジフェニル(メタ)アクリルアミドを含有する熱硬化性樹脂組成物、およびその硬化物 |
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| WO2019198792A1 (ja) * | 2018-04-13 | 2019-10-17 | 日本曹達株式会社 | 接着性組成物 |
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| WO2023190374A1 (ja) | 2022-03-29 | 2023-10-05 | 日本曹達株式会社 | ジフェニル(メタ)アクリルアミドを含有する熱硬化性樹脂組成物、およびその硬化物 |
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| TWI882105B (zh) | 2025-05-01 |
| KR20220159967A (ko) | 2022-12-05 |
| US20230120998A1 (en) | 2023-04-20 |
| EP4130166A4 (en) | 2024-04-10 |
| EP4130166A1 (en) | 2023-02-08 |
| JP7671737B2 (ja) | 2025-05-02 |
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