Acrylic resin, active energy ray curable resin composition, cured product and article

Abstract

To provide an acrylic resin excellent in water repellency, and to provide an active energy ray-curable resin composition, a cured product, and an article containing the acrylic resin.SOLUTION: There are used: an acrylic resin which is a copolymer of polymerizable compounds including a polysiloxane compound (A) having one (meth)acryloyl group in one molecule and a polysiloxane compound (B) having at least two (meth)acryloyl groups in one molecule; and an active energy ray-curable resin composition, a cured product, and an article containing the acrylic resin.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an acrylic resin, an active energy ray-curable resin composition, a cured product, and an article. [Background technology]

[0002] Automobile exterior parts such as headlamps, safety sensors, and roofs have the problem that their functionality is temporarily impaired by snowfall and rainfall. In recent years, methods have been investigated that allow snow and rain to slide off the surfaces of components naturally while the vehicle is in motion, as well as methods of applying a coating agent on top to prevent dirt from adhering and improve dirt removal.

[0003] Known methods for applying a coating agent on top include introducing a fluorine structure or a silicone structure for the purpose of imparting water repellency to the coating layer. For example, an active energy ray-curable resin composition is known which is obtained by blending a polysiloxane structure-containing urethane (meth)acrylate compound with a reactive fluorine-containing compound of a specific structure (see, for example, Patent Document 1). However, the water repellency of the obtained cured product does not satisfy the increasingly high required characteristics, and is not sufficient for current market demands.

[0004] Therefore, there is a demand for materials with even better water repellency. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2014-080585 A Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide an acrylic resin having excellent water repellency, an active energy ray-curable resin composition containing the same, and a cured product and article. [Means for solving the problem]

[0007] As a result of intensive research into solving the above problems, the present inventors have found that the above problems can be solved by using an acrylic resin that is a reaction product of a copolymer of a polymerizable compound containing two specific types of polysiloxane compounds and (meth)acrylic acid, and have completed the present invention.

[0008] That is, the present invention relates to an acrylic resin characterized by being a copolymer of polymerizable compounds containing a polysiloxane compound (A) having one (meth)acryloyl group in one molecule and a polysiloxane compound (B) having at least two (meth)acryloyl groups in one molecule, and to an active energy ray-curable resin composition, a cured product, and an article containing the same. Effect of the Invention

[0009] The acrylic resin of the present invention has excellent water repellency and can therefore be suitably used in paints and the like. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The acrylic resin of the present invention is characterized in that it is a copolymer of polymerizable compounds containing a polysiloxane compound (A) having one (meth)acryloyl group in one molecule, and a polysiloxane compound (B) having at least two (meth)acryloyl groups in one molecule.

[0011] In the present invention, "(meth)acryloyl" means acryloyl and / or methacryloyl. "(meth)acrylic" means acrylic and / or methacrylic. "(meth)acrylate" means acrylate and / or methacrylate.

[0012] Examples of the polysiloxane compound (A) having one (meth)acryloyl group in one molecule (hereinafter abbreviated as "polysiloxane compound (A)") include polysiloxane compounds represented by the following general formula (1).

[0013] [ka] [In formula (1), R 1 represents a hydrogen atom or a methyl group, R 2 represents a hydrocarbon group having 2 to 10 carbon atoms, R 3 each independently represents an alkyl group having 1 to 4 carbon atoms, and n represents an integer of 4 to 100.

[0014] In addition, examples of commercially available polysiloxane compounds (A) include "Silaplane FM-0711" (number average molecular weight Mn: 1,000), "Silaplane FM-0721" (number average molecular weight Mn: 5,000), "Silaplane FM-0725" (number average molecular weight Mn: 10,000), and "Silaplane TM-0701T" (number average molecular weight Mn: 423), all manufactured by JNC Corporation; and "X-22-174ASX" (number average molecular weight Mn: 900), "X-22-174BX" (number average molecular weight Mn: 2,300), "KF-2012" (number average molecular weight Mn: 4,600), "X-22-2426" (number average molecular weight Mn: 12,000), and "X-22-2404" (number average molecular weight Mn: 420), all manufactured by Shin-Etsu Chemical Co., Ltd. Among these, "Silaplane FM-0711", "Silaplane TM-0701T", "X-22-174ASX" and "X-22-174BX" are preferred because they are capable of producing acrylic resins capable of forming cured products having excellent water repellency. These polysiloxane compounds can be used alone or in combination of two or more kinds.

[0015] The number average molecular weight of the polysiloxane compound (A) is preferably less than 10,000, and more preferably in the range of 300 to 3,000, since an acrylic resin capable of forming a cured product having excellent water repellency can be obtained. In the present invention, the number average molecular weight indicates a value measured by gel permeation chromatography (GPC).

[0016] Examples of the polysiloxane compound (B) having at least two (meth)acryloyl groups in one molecule (hereinafter abbreviated as "polysiloxane compound (B)") include polysiloxane compounds represented by the following general formula (2).

[0017] [ka] [In formula (2), R 1 each independently represents a hydrogen atom or a methyl group; R 2 each independently represents a hydrocarbon group having 2 to 10 carbon atoms; R 3 each independently represents an alkyl group having 1 to 4 carbon atoms, and n represents an integer of 4 to 100.

[0018] In addition, examples of commercially available products of the polysiloxane compound (A) include "Silaplane FM-7711" (number average molecular weight Mn: 1,000), "Silaplane FM-7721" (number average molecular weight Mn: 5,000), and "Silaplane FM-7731" (number average molecular weight Mn: 5,000), all manufactured by JNC Corporation. Examples of such copolymers include "X-22-164" (number average molecular weight Mn: 380), "X-22-164AS" (number average molecular weight Mn: 900), "X-22-164A" (number average molecular weight Mn: 1,740), "X-22-164B" (number average molecular weight Mn: 3,200), "X-22-164C" (number average molecular weight Mn: 4,800), "X-22-164E" (number average molecular weight Mn: 7,800), and "X-22-2445" (number average molecular weight Mn: 3,200), all manufactured by Shin-Etsu Chemical Co., Ltd. Among these, "Silaplane FM-7721", "Silaplane FM-7725", "X-22-164B", "X-22-164C", "X-22-164E", and "X-22-2445" are preferred because they are capable of producing acrylic resins capable of forming cured products having excellent water repellency. These polysiloxane compounds can be used alone or in combination of two or more kinds.

[0019] The number average molecular weight of the polysiloxane compound (B) is preferably 2,000 or more and less than 15,000, more preferably in the range of 2,000 to 12,000, since an acrylic resin capable of forming a cured product having excellent water repellency can be obtained.

[0020] The polymerizable compound may contain other polymerizable compounds, if necessary, in addition to the polysiloxane compound (A) and the polysiloxane compound (B).

[0021] Examples of the other polymerizable compounds include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate, hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, isopentyl (meth)acrylate, tridecyl (meth)acrylate, stearyl (meth)acrylate, and lauric acid. alkyl (meth)acrylates having 1 to 18 carbon atoms, such as aryl (meth)acrylate, benzyl (meth)acrylate, tetrahydrofurfuryl (meth)acrylate, isobornyl (meth)acrylate, cyclohexyl (meth)acrylate, tricyclodecane monomethylol (meth)acrylate, acryloxyethyl phthalate, 2-(meth)acryloyloxypropyl phthalate, dimethylaminoethyl (meth)acrylate, diethylaminoethyl (meth)acrylate, (meth)acryloylmorpholine , 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, hydroxypentyl (meth)acrylate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, 2-hydroxy-3-butoxypropyl (meth)acrylate, 2-hydroxy-3-methoxypropyl (meth)acrylate, 2-(meth)acryloyloxyethyl-2 -Aliphatic (meth)acrylate compounds such as hydroxyethyl phthalate, diethylene glycol mono(meth)acrylate, triethylene glycol mono(meth)acrylate, polyethylene glycol mono(meth)acrylate, dipropylene glycol mono(meth)acrylate, polypropylene glycol mono(meth)acrylate, glycerin mono(meth)acrylate, glycerin di(meth)acrylate, trimethylolpropane di(meth)acrylate, and pentaerythritol tri(meth)acrylate;Aromatic ring-containing (meth)acrylate compounds such as 4-hydroxyphenyl acrylate, β-hydroxyphenethyl acrylate, 4-hydroxyphenethyl acrylate, 1-phenyl-2-hydroxyethyl acrylate, 3-hydroxy-4-acetylphenyl acrylate, and 2-hydroxy-3-phenoxypropyl acrylate; polyether-modified (meth)acrylate compounds obtained by ring-opening polymerization of the above (meth)acrylate compounds with various cyclic ether compounds such as ethylene oxide, propylene oxide, tetrahydrofuran, ethyl glycidyl ether, propyl glycidyl ether, butyl glycidyl ether, phenyl glycidyl ether, and allyl glycidyl ether. monohydroxy(meth)acrylate compounds such as lactone-modified (meth)acrylate compounds obtained by polycondensation of the above-mentioned (meth)acrylate compounds with lactone compounds such as ε-caprolactone; compounds having a hydroxyl group and a polymerizable unsaturated group, such as polyol acrylate compounds such as trimethylolpropane mono(meth)acrylate, pentaerythritol mono(meth)acrylate, and pentaerythritol di(meth)acrylate; compounds having a carboxyl group and a polymerizable hydroxyl group, such as (meth)acrylic acid, β-carboxyethyl (meth)acrylate, (meth)acrylic acid dimer, ω-carboxy-polycaprolactone mono(meth)acrylate, maleic acid, and itaconic acid;Examples of the polymerizable unsaturated group include styrene, alkyl-substituted styrene, halogen-substituted styrene, benzyl (meth)acrylate, phenyl (meth)acrylate, phenoxyethyl (meth)acrylate, phenoxy polyethylene glycol (meth)acrylate, biphenyl (meth)acrylate, nonylphenyl (meth)acrylate, nonylphenoxyethyl (meth)acrylate, nonylphenoxy polyethylene glycol (meth)acrylate, cumylphenol (meth)acrylate, cumylphenoxyethyl (meth)acrylate, cumylphenoxy polyethylene glycol (meth)acrylate, o-phenylphenol (meth)acrylate, ethoxylated o-phenylphenol (meth)acrylate, tribromophenyl (meth)acrylate, and EO-modified tribromophenyl (meth)acrylate, and aromatic compounds having a polymerizable unsaturated group such as vinyl toluene. These other polymerizable compounds can be used alone or in combination of two or more.;

[0022] The method for producing the acrylic resin of the present invention is not particularly limited, and the resin can be produced by a known method, for example, a method of copolymerizing a polymerizable compound containing the compound (A) and the compound (B) in the presence of a polymerization initiator.

[0023] Various conditions in the production of the acrylic resin of the present invention can be appropriately set according to the raw materials used and their amounts. For example, a method of producing the resin by first adding a part of the raw materials to a reaction vessel, heating the reaction vessel, and then performing a polymerization reaction while dropping the remaining raw materials; a method of producing the resin by adding an organic solvent to a reaction vessel, heating the reaction vessel, and then performing a polymerization reaction while dropping the mixture of raw materials used in the reaction; a method of producing the resin by adding an organic solvent to a reaction vessel, heating the reaction vessel to above the boiling point of the organic solvent under a sealed and pressurized condition, and then performing a polymerization reaction while dropping the mixture of raw materials used in the reaction, etc. can be mentioned.

[0024] Examples of the organic solvent include ketone solvents such as methyl ethyl ketone, acetone, dimethylformamide, and methyl isobutyl ketone; cyclic ether solvents such as tetrahydrofuran and dioxolane; ester solvents such as methyl acetate, ethyl acetate, and butyl acetate; aromatic solvents such as toluene, xylene, and solvent naphtha; alicyclic solvents such as cyclohexane and methylcyclohexane; alcohol solvents such as carbitol, cellosolve, methanol, isopropanol, butanol, and propylene glycol monomethyl ether; glycol ether solvents such as alkylene glycol monoalkyl ether, dialkylene glycol monoalkyl ether, and dialkylene glycol monoalkyl ether acetate; methoxypropanol, cyclohexanone, methyl cellosolve, diethylene glycol monoethyl ether acetate, and propylene glycol monomethyl ether acetate. These organic solvents can be used alone or in combination of two or more.

[0025] The active energy ray-curable resin composition of the present invention contains the acrylic resin of the present invention, a compound having a polymerizable unsaturated group, and a photopolymerization initiator.

[0026] Examples of the compound having a polymerizable unsaturated group include aliphatic mono(meth)acrylate compounds such as methyl(meth)acrylate, ethyl(meth)acrylate, propyl(meth)acrylate, butyl(meth)acrylate, pentyl(meth)acrylate, hexyl(meth)acrylate, 2-ethylhexyl(meth)acrylate, and octyl(meth)acrylate; alicyclic mono(meth)acrylate compounds such as cyclohexyl(meth)acrylate, isobornyl(meth)acrylate, and adamantyl mono(meth)acrylate; and glycidyl(meth)acrylate. heterocyclic mono(meth)acrylate compounds such as tetrahydrofurfuryl acrylate; mono(meth)acrylates such as aromatic mono(meth)acrylate compounds such as benzyl (meth)acrylate, phenyl (meth)acrylate, phenylbenzyl (meth)acrylate, phenoxy (meth)acrylate, phenoxyethyl (meth)acrylate, phenoxyethoxyethyl (meth)acrylate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, phenoxybenzyl (meth)acrylate, and phenylphenoxyethyl (meth)acrylate;

[0027] 1,6-Hexanediol di(meth)acrylate, 1,4-Butanediol di(meth)acrylate, 1,3-Butylene glycol di(meth)acrylate, 1,9-Nonanediol di(meth)acrylate, 1,10-Decanediol di(meth)acrylate, Neopentyl glycol di(meth)acrylate, Ethylene oxide modified 1,6-Hexanediol di(meth)acrylate, Hydroxypivalic acid neopentyl glycol di(meth)acrylate, Propylene oxide modified neopentyl glycol di(meth)acrylate, Tripropylene Glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, ethylene oxide modified di(meth)acrylate of bisphenol A, propylene oxide modified di(meth)acrylate of bisphenol A, ethylene oxide modified di(meth)acrylate of bisphenol F, tricyclodecane dimethanol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, polypropylene glycol di(meth)acrylate acrylate, propylene oxide modified tri(meth)acrylate of glycerin, 2-hydroxy-3-acryloyloxypropyl (meth)acrylate, ethylene oxide modified di(meth)acrylate of bisphenoxyethanol fluorene, polytetramethylene glycol di(meth)acrylate, ethoxylated isocyanuric acid tri(meth)acrylate, phenoxyethylene glycol (meth)acrylate, stearyl (meth)acrylate, 2-(meth)acryloyloxyethyl succinate, trifluoroethyl (meth)acrylate 3-methyl-1, 5-pentanediol di(meth)acrylate, 2,3-[(meth)acryloyloxymethyl]norbornane, 2,5-[(meth)acryloyloxymethyl]norbornane, 2,6-[(meth)acryloyloxymethyl]norbornane, 1,3-adamantyl di(meth)acrylate, 1,3-bis[(meth)acryloyloxymethyl]adamantane, tris(hydroxyethyl)isocyanuric acid di(meth)acrylate, 3,9-bis[1,1-dimethyl-2-(meth)acryloyloxyethyl]-2,4,8,10-tetraoxospiro[5.5] Bifunctional (meth)acrylates such as undecane, trimethylolpropane di(meth)acrylate, pentaerythritol di(meth)acrylate, dipentaerythritol di(meth)acrylate, ditrimethylolpropane di(meth)acrylate, 2-hydroxy-3-acryloyloxypropyl methacrylate, and glycerin di(meth)acrylate;

[0028] trifunctional (meth)acrylates such as EO-modified glycerol (meth)acrylate, PO-modified glycerol tri(meth)acrylate, glycerin tri(meth)acrylate, pentaerythritol tri(meth)acrylate, EO-modified phosphoric acid tri(meth)acrylate, trimethylolpropane tri(meth)acrylate, caprolactone-modified trimethylolpropane tri(meth)acrylate, HPA-modified trimethylolpropane tri(meth)acrylate, (EO) or (PO)-modified trimethylolpropane tri(meth)acrylate, alkyl-modified dipentaerythritol tri(meth)acrylate, tris(acryloxyethyl)isocyanurate, and tris(methacryloxyethyl)isocyanurate;

[0029] tetrafunctional (meth)acrylates such as ditrimethylolpropane tetra(meth)acrylate, pentaerythritol ethoxy tetra(meth)acrylate, and pentaerythritol tetra(meth)acrylate;

[0030] Pentafunctional (meth)acrylates such as dipentaerythritol hydroxypenta(meth)acrylate and alkyl-modified dipentaerythritol penta(meth)acrylate;

[0031] Examples include hexafunctional (meth)acrylates such as dipentaerythritol hexa(meth)acrylate.

[0032] Further examples include (poly)oxyalkylene-modified (meth)acrylates in which a polyoxyalkylene chain such as a (poly)oxyethylene chain, a (poly)oxypropylene chain, or a (poly)oxytetramethylene chain has been introduced into the molecular structure of the various (meth)acrylates mentioned above, and lactone-modified (meth)acrylates in which a (poly)lactone structure has been introduced into the molecular structure of the various (meth)acrylates mentioned above.

[0033] These compounds having a polymerizable unsaturated group can be used alone or in combination of two or more. In addition, compounds having an average of 2 to 6 polymerizable unsaturated groups per molecule are preferred, since they can provide a urethane (meth)acrylate resin capable of forming a cured product having excellent water repellency.

[0034] Examples of the photopolymerization initiator include photoradical polymerization initiators such as 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-[4-(2-hydroxyethoxy)phenyl]-2-hydroxy-2-methyl-1-propan-1-one, thioxanthone and thioxanthone derivatives, 2,2'-dimethoxy-1,2-diphenylethan-1-one, diphenyl(2,4,6-trimethoxybenzoyl)phosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one, and 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-1-butanone.

[0035] Commercially available products of the photopolymerization initiator include, for example, "Omnirad 1173", "Omnirad 184", "Omnirad 127", "Omnirad 2959", "Omnirad 369", "Omnirad 379", "Omnirad 907", "Omnirad 4265", "Omnirad 1000", "Omnirad 651", "Omnirad TPO", "Omnirad 819", "Omnirad 2022", "Omnirad 2100", "Omnirad 754", "Omnirad 784", "Omnirad 500", and "Omnirad 81" (manufactured by IGM Resins); "KAYACURE DETX", "KAYACURE MBP", "KAYACURE DMBI", "KAYACURE EPA", and "KAYACURE OA" (manufactured by Nippon Kayaku Co., Ltd.); "Vicure 10" and "Vicure 55" (manufactured by Stoffa Examples of photopolymerization initiators include "Trigonal P1" (manufactured by Akzo Nobel), "SANDORAY 1000" (manufactured by SANDOZ), "DEAP" (manufactured by Upjohn Chemical), "Quantacure PDO", "Quantacure ITX", "Quantacure EPD" (manufactured by Ward Blenkinsop), and "Runtecure 1104" (manufactured by Runtec). These photopolymerization initiators can be used alone or in combination of two or more kinds.

[0036] The amount of the photopolymerization initiator added is preferably within a range of, for example, 0.5 to 20% by mass in the active energy ray-curable resin composition.

[0037] In addition, since the active energy ray-curable resin composition can improve the curability of a cured coating film of the active energy ray-curable resin composition, a photosensitizer can be further added, if necessary, to improve the curability.

[0038] Examples of the photosensitizer include 2,4,6-trimethylbenzophenone, 2,3,4-trimethylbenzophenone, 4-phenylbenzophenone, 3,3'-dimethyl-4-methoxybenzophenone, 4-(1,3-acryloyl-1,4,7,10,13-pentaoxotridecyl)benzophenone, methyl-o-benzoylbenzoate, [4-(methylphenylthio)phenyl]phenylmethanone, (4-benzoylbenzyl)trimethylammonium chloride, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-(4-isopropylphenyl)2-hydroxy-2-methyl-1-phenyl Examples of the photosensitizer include 1-nylpropan-1-one, 1-hydroxycyclohexyl-phenyl ketone, 2-hydroxy-2-methyl-1-styrylpropan-1-one polymer, diethoxyacetophenone, dibutoxyacetophenone, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzoin normal butyl ether, amine compounds such as aliphatic amines and aromatic amines, urea compounds such as o-tolylthiourea, and sulfur compounds such as sodium diethyldithiophosphate and s-benzylisothiuronium-p-toluenesulfonate. These photosensitizers can be used alone or in combination of two or more kinds.

[0039] In addition, the active energy ray-curable resin composition of the present invention may contain various additives, such as an ultraviolet absorber, a polymerization inhibitor, an antioxidant, an organic solvent, an inorganic filler or polymer fine particles, a pigment, an antifoaming agent, a viscosity adjuster, a leveling agent, a flame retardant, and a storage stabilizer, as necessary.

[0040] Examples of the ultraviolet absorbent include triazine derivatives such as 2-[4-{(2-hydroxy-3-dodecyloxypropyl)oxy}-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine and 2-[4-{(2-hydroxy-3-tridecyloxypropyl)oxy}-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-(2'-xanthenecarboxy-5'-methylphenyl)benzotriazole, 2-(2'-o-nitrobenzyloxy-5'-methylphenyl)benzotriazole, 2-xanthenecarboxy-4-dodecyloxybenzophenone, and 2-o-nitrobenzyloxy-4-dodecyloxybenzophenone. These ultraviolet absorbents can be used alone or in combination of two or more.

[0041] Examples of the polymerization inhibitor include p-methoxyphenol, p-methoxycresol, 4-methoxy-1-naphthol, 4,4'-dialkoxy-2,2'-bi-1-naphthol, 3-(N-salicyloyl)amino-1,2,4-triazole, N'1,N'12-bis(2-hydroxybenzoyl)dodecane dihydrazide, styrenated phenol, N-isopropyl-N'-phenylbenzene-1,4-diamine, 6-ethoxy-2,2,4-trimethyl- Phenol compounds such as 1,2-dihydroquinoline, quinone compounds such as hydroquinone, methylhydroquinone, p-benzoquinone, methyl-p-benzoquinone, 2,5-diphenylbenzoquinone, 2-hydroxy-1,4-naphthoquinone, anthraquinone, and diphenoquinone, melamine, p-phenylenediamine, 4-aminodiphenylamine, N.N'-diphenyl-p-phenylenediamine, Ni-propyl-N'-phenyl-p-phenylenediamine, N-(1.amine compounds such as 3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, diphenylamine, 4,4'-dicumyl-diphenylamine, 4,4'-dioctyl-diphenylamine, poly(2,2,4-trimethyl-1,2-dihydroquinoline), styrenated diphenylamine, reaction products of styrenated diphenylamine and 2,4,4-trimethylpentene, reaction products of diphenylamine and 2,4,4-trimethylpentene, phenothiazine, distearyl thiodipropionate, 2,2-bis({[3-(dodecyl) thioether compounds such as N-nitrosodiphenylamine, N-nitrosophenylnaphthylamine, p-nitrosophenol, nitrosobenzene, p-nitrosodiphenylamine, α-nitroso-β-naphthol, N,N-dimethyl p-nitrosoaniline, p-nitrosodiphenylamine, p-nitrosodimethylamine, p-nitroso ... -N,N-diethylamine, N-nitrosoethanolamine, N-nitrosodi-n-butylamine, N-nitroso-Nn-butyl-4-butanolamine, N-nitroso-diisopropanolamine, N-nitroso-N-ethyl-4-butanolamine, 5-nitroso-8-hydroxyquinoline, N-nitrosomorpholine, N-nitroso-N-phenylhydroxylamine ammonium salt, nitrosobenzene, N-nitroso-N-methyl-p-toluenesulfonamide, N-nitroso-N-ethylurethane, N-nitroso-Nn -Propyl urethane, 1-nitroso-2-naphthol, 2-nitroso-1-naphthol, sodium 1-nitroso-2-naphthol-3,6-sulfonate, sodium 2-nitroso-1-naphthol-4-sulfonate, 2-nitroso-5-methylaminophenol hydrochloride, 2-nitroso-5-methylaminophenol hydrochloride and other nitroso compounds, esters of phosphoric acid and octadecane-1-ol, triphenyl phosphite, 3,9-dioctadecan-1-yl-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]Undecane, trisnonylphenyl phosphite, phosphorous acid-(1-methylethylidene)-di-4,1-phenylenetetra-C12-15-alkyl ester, 2-ethylhexyl diphenyl phosphite, diphenyl isodecyl phosphite, triisodecyl phosphite, tris(2,4-di-tert-butylphenyl) phosphite and other phosphite compounds, bis(dimethyldithiocarbamato-κ(2)S,S')zinc, diethyldithiocarbamate , zinc compounds such as zinc dibutyl dithiocarbamate, nickel compounds such as bis(N,N-dibutylcarbamodithioato-S,S')nickel, sulfur compounds such as 1,3-dihydro-2H-benzimidazole-2-thione, 4,6-bis(octylthiomethyl)-o-cresol, 2-methyl-4,6-bis[(octan-1-ylsulfanyl)methyl]phenol, dilauryl thiodipropionate, and distearyl 3,3'-thiodipropionate. These polymerization inhibitors can be used alone or in combination of two or more.

[0042] As the antioxidant, the same compounds as those exemplified as the polymerization inhibitor can be used, and the antioxidants can be used alone or in combination of two or more kinds.

[0043] In addition, examples of commercially available products of the polymerization inhibitor and the antioxidant include "Q-1300" and "Q-1301" manufactured by Wako Pure Chemical Industries, Ltd., and "Sumilizer BBM-S" and "Sumilizer GA-80" manufactured by Sumitomo Chemical Co., Ltd.

[0044] As the organic solvent, the same organic solvents as those exemplified above can be used, and the organic solvents can be used alone or in combination of two or more kinds.

[0045] Examples of the inorganic filler include fused silica, crystalline silica, alumina, silicon nitride, aluminum hydroxide, etc. These inorganic fillers can be used alone or in combination of two or more kinds.

[0046] As the pigment, known and commonly used inorganic pigments and organic pigments can be used.

[0047] Examples of the inorganic pigment include white pigments, antimony red, red iron oxide, cadmium red, cadmium yellow, cobalt blue, Prussian blue, ultramarine blue, carbon black, graphite, etc. These inorganic pigments can be used alone or in combination of two or more kinds.

[0048] Examples of the white pigment include titanium oxide, zinc oxide, magnesium oxide, zirconium oxide, aluminum oxide, barium sulfate, silica, talc, mica, aluminum hydroxide, calcium silicate, aluminum silicate, hollow resin particles, zinc sulfide, etc. These white pigments can be used alone or in combination of two or more kinds.

[0049] Examples of the organic pigment include quinacridone pigments, quinacridonequinone pigments, dioxazine pigments, phthalocyanine pigments, anthrapyrimidine pigments, anthanthrone pigments, indanthrone pigments, flavanthrone pigments, perylene pigments, diketopyrrolopyrrole pigments, perinone pigments, quinophthalone pigments, anthraquinone pigments, thioindigo pigments, benzimidazolone pigments, azo pigments, etc. These organic pigments can be used alone or in combination of two or more kinds.

[0050] Examples of the defoaming agent include silicone-based defoaming agents, polyether-based defoaming agents, fatty acid ester-based defoaming agents, etc. These defoaming agents can be used alone or in combination of two or more kinds.

[0051] Examples of the viscosity modifier include acrylic polymers and synthetic rubber latexes that can be thickened by adjusting the alkalinity, urethane resins that can be thickened by molecular association, hydroxyethyl cellulose, carboxymethyl cellulose, methyl cellulose, polyvinyl alcohol, water-added castor oil, amide wax, polyethylene oxide, metal soaps, dibenzylidene sorbitol, etc. These viscosity modifiers can be used alone or in combination of two or more kinds.

[0052] Examples of the leveling agent include silicone compounds, acetylene diol compounds, fluorine compounds, etc. These leveling agents can be used alone or in combination of two or more kinds.

[0053] Examples of the flame retardant include inorganic phosphorus compounds such as red phosphorus, ammonium phosphates such as monoammonium phosphate, diammonium phosphate, triammonium phosphate, and ammonium polyphosphate, and phosphoric acid amides; phosphoric acid ester compounds, phosphonic acid compounds, phosphinic acid compounds, phosphine oxide compounds, phosphorane compounds, organic nitrogen-containing phosphorus compounds, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxy, and the like. Examples of the flame retardants include organic phosphorus compounds such as cyclic organic phosphorus compounds such as 10-(2,7-dihydroxynaphthyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide and derivatives thereof reacted with compounds such as epoxy resins and phenolic resins; nitrogen-based flame retardants such as triazine compounds, cyanuric acid compounds, isocyanuric acid compounds, and phenothiazine; silicone-based flame retardants such as silicone oils, silicone rubbers, and silicone resins; and inorganic flame retardants such as metal hydroxides, metal oxides, metal carbonate compounds, metal powders, boron compounds, and low-melting glass. These flame retardants can be used alone or in combination of two or more.

[0054] The cured product of the present invention can be obtained by irradiating the active energy ray curable resin composition with active energy rays. Examples of the active energy rays include ionizing radiation such as ultraviolet rays, electron beams, α rays, β rays, and γ rays. When ultraviolet rays are used as the active energy rays, irradiation may be performed under an inert gas atmosphere such as nitrogen gas, or under an air atmosphere in order to efficiently carry out a curing reaction by ultraviolet rays.

[0055] As a source of ultraviolet light, ultraviolet lamps are generally used from the viewpoints of practicality and economy, and specific examples include low-pressure mercury lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, xenon lamps, gallium lamps, metal halide lamps, sunlight, LEDs, etc.

[0056] The cumulative amount of the active energy rays is not particularly limited, but is preferably 0.1 to 50 kJ / m 2 is preferably 0.5 to 10 kJ / m 2 It is more preferable that the integrated light amount is within the above range, since it is possible to prevent or suppress the occurrence of uncured portions.

[0057] The irradiation of the active energy rays may be carried out in one step or in two or more steps.

[0058] The article of the present invention has a coating film of the cured product. Examples of the article include plastic molded products such as mobile phones, home appliances, automobile interior and exterior materials, and office automation equipment, as well as semiconductor devices, display devices, and imaging devices. EXAMPLES

[0059] The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to the examples given below.

[0060] In the examples, the weight average molecular weight (Mw) and the number average molecular weight (Mn) were measured using a gel permeation chromatograph (GPC) under the following conditions.

[0061] Measuring device: Tosoh Corporation HLC-8220 Column: Guard column H manufactured by Tosoh Corporation XL -H + Tosoh Corporation TSKgel G5000HXL + Tosoh Corporation TSKgel G4000HXL + Tosoh Corporation TSKgel G3000HXL + Tosoh Corporation TSKgel G2000HXL Detector: RI (differential refractometer) Data processing: Tosoh Corporation SC-8010 Measurement conditions: Column temperature 40℃ Solvent Tetrahydrofuran Flow rate 1.0ml / min Standard: Polystyrene Sample: 100 μl of tetrahydrofuran solution containing 0.4% by mass of resin solids filtered through a microfilter

[0062] (Example 1: Preparation of acrylic resin (1)) A flask equipped with a stirring rod, a temperature sensor, and a water-cooled condenser was charged with 65 parts by mass of butyl acetate, and the mixture was heated to 110°C while being stirred with dry nitrogen flowing. A mixed solution of 47 parts by mass of methyl methacrylate, 31 parts by mass of isobutanyl methacrylate, 17 parts by mass of butyl methacrylate, 4 parts by mass of polysiloxane compound (A) ("Silaplane FM-0701T" manufactured by JNC Corporation, number average molecular weight 423), 1 part by mass of polysiloxane compound (B) ("Silaplane FM-7721" manufactured by JNC Corporation, number average molecular weight 5,000), 5 parts by mass of (2-ethylhexanoyl) (tert-butyl) peroxide ("Perbutyl O" manufactured by Nippon Oil & Fats Co., Ltd.), and 21 parts by mass of butyl acetate was dropped from a dropping funnel over a period of 4 hours to carry out acrylic polymerization. After confirming that the viscosity and non-volatile content had become constant, acrylic resin (1) was obtained. The acrylic resin (1) had a non-volatile content of 55% by mass, a number average molecular weight (Mn) of 3,900, and a weight average molecular weight (Mw) of 15,700.

[0063] (Comparative Example 1: Preparation of Acrylic Resin (R1)) A flask equipped with a stirring rod, a temperature sensor, and a water-cooled condenser was charged with 65 parts by mass of butyl acetate, and the temperature was raised to 110°C while stirring with dry nitrogen flowing. A mixed solution of 50 parts by mass of methyl methacrylate, 31 parts by mass of isobornyl methacrylate, 19 parts by mass of butyl methacrylate, 5 parts by mass of (2-ethylhexanoyl)(tert-butyl)peroxide ("Perbutyl O" manufactured by Nippon Oil & Fats Co., Ltd.), and 21 parts by mass of butyl acetate was dropped from a dropping funnel over 4 hours to perform acrylic polymerization. After confirming that the viscosity and non-volatile content were constant, an acrylic resin (R1) was obtained. The non-volatile content of this acrylic resin (R1) was 55% by mass, the number average molecular weight (Mn) was 3,700, and the weight average molecular weight (Mw) was 15,200.

[0064] (Example 2: Preparation of active energy ray-curable resin composition (1)) An ethylenically unsaturated compound ("DPA-600T" manufactured by Toagosei Co., Ltd., dipentaerythritol hexaacrylate), a photopolymerization initiator, an ultraviolet absorber, and a light stabilizer were mixed into the acrylic resin (1) obtained in Example 1 in a ratio calculated as solid content shown in Table 1, and the mixture was adjusted with butyl acetate to obtain an active energy ray-curable resin composition (1) having a non-volatile content of 50 mass%.

[0065] (Comparative Example 2: Preparation of active energy ray-curable resin composition (R1)) An ethylenically unsaturated compound (dipentaerythritol hexaacrylate, "DPA-600T" manufactured by Toagosei Co., Ltd.), a photopolymerization initiator, an ultraviolet absorber, and a light stabilizer were mixed into the acrylic resin (R1) obtained in Comparative Example 1 in the proportions shown in Table 1 in terms of solid content, and the proportions were adjusted with butyl acetate to obtain an active energy ray-curable resin composition (R1) having a non-volatile content of 50 mass%.

[0066] The active energy ray-curable resin compositions (1) and (R1) obtained in the above Examples and Comparative Examples were used to carry out the following evaluations.

[0067] [How to evaluate the appearance of the coating] The active energy ray-curable resin compositions obtained in the Examples and Comparative Examples were applied to a polycarbonate substrate using a bar coater so that the film thickness after drying would be 10 μm, and the applied film was dried at 70° C. for 5 minutes, and then exposed to an accumulated irradiation dose of 30 kJ / m using a high-pressure mercury lamp (lamp output 160 W / cm). 2 The appearance of the resulting cured coating film was visually observed and evaluated according to the following criteria.

[0068] ○: The coating was transparent and had no abnormalities. ×: The coating film was clouded or craters were found on the surface of the coating film.

[0069] [Method of evaluating adhesion] Using the above cured coating, make cuts on the surface of the coating in a 10 x 10 grid pattern at 1 mm intervals with a cutter knife, and 2 Next, cellophane tape was applied to the squares and then quickly peeled off to conduct a square test. The number of remaining squares out of the 100 squares was evaluated according to the following criteria.

[0070] ○: The remaining number was 100. △: The remaining number was 90 or more and less than 100. ×: The number of remaining cells was less than 90.

[0071] [Water repellency evaluation method] The water repellency was evaluated by measuring the water contact angle and the water sliding angle.

[0072] [Method for measuring water contact angle] The contact angle of purified water of the cured coating film formed on the polycarbonate substrate was measured using "DMo-501" manufactured by Kyowa Interface Science Co., Ltd. The higher the value, the better the water repellency.

[0073] [Method of measuring water slide angle] The sliding angle of purified water was measured for the cured coating film formed on the polycarbonate substrate using "DMo-501" manufactured by Kyowa Interface Science Co., Ltd. The sliding angle was measured by placing a 20 μL water droplet on the coating surface, tilting the measuring table by 1° each time, and measuring the angle at which the water droplet moved 2 cm. The lower the value, the better the sliding and water repellency. If the water droplet did not slide even when tilted by 90° or more, it was indicated as "X".

[0074] The compositions and evaluation results of the active energy ray-curable resin composition (1) prepared in Example 2 and the active energy ray-curable resin composition (R1) prepared in Comparative Example 2 are shown in Table 1.

[0075] [Table 1]

[0076] In addition, the parts by mass of the acrylic resin (1) and the acrylic resin (R1) in Table 1 are solid content values.

[0077] "Photopolymerization initiator (A)" in Table 1 refers to "Omnirad 184" manufactured by IGM Resins.

[0078] "Photopolymerization initiator (B)" in Table 1 refers to "Omnirad TPO" manufactured by IGM Resins.

[0079] "UV absorber" in Table 1 refers to "Tinuvin 400" manufactured by BASF Japan Ltd.

[0080] "Light stabilizer" in Table 1 refers to "Tinuvin 123" manufactured by BASF Japan Ltd.

[0081] Example 2 shown in Table 1 is an example of an active energy ray-curable resin composition of the present invention. It was confirmed that this active energy ray-curable resin composition has excellent water repellency.

[0082] On the other hand, Comparative Example 2 is an example of an active energy ray curable resin composition containing an acrylic resin that does not use as raw materials a polysiloxane compound (A) having one (meth)acryloyl group in one molecule and a polysiloxane compound (B) having at least two (meth)acryloyl groups in one molecule. It was confirmed that this active energy ray curable resin composition had a water sliding angle of 90 degrees or more and had insufficient water repellency.

Claims

1. an acrylic resin which is a copolymer of polymerizable compounds including a polysiloxane compound (A) having one (meth)acryloyl group in one molecule and a polysiloxane compound (B) having at least two (meth)acryloyl groups in one molecule; An active energy ray-curable resin composition comprising a compound having an average of 2 to 6 polymerizable unsaturated groups per molecule and a photopolymerization initiator.

2. 2. The method according to claim 1, wherein the polysiloxane compound (A) has a number average molecular weight of less than 10,000. The active energy ray-curable resin composition according to claim 1,

3. The number average molecular weight of the polysiloxane compound (B) is 2,000 or more and less than 15,000.

2. The active energy ray-curable resin composition according to claim 1, wherein

4. A cured product of the active energy ray-curable resin composition according to any one of claims 1 to 3.

5. An article having a coating film of the cured product according to claim 4.

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