JP2013010938A - Curable resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curable resin composition with which a coating film and a pattern excellent in heat resistance can be formed.SOLUTION: The curable resin composition includes: (A) an addition polymer including a structural unit derived from at least one selected from the group consisting of an unsaturated carboxylic acid and an unsaturated carboxylic acid anhydride and a structural unit derived from an unsaturated compound having an oxiranyl group; (B) a compound having at least one group selected from the group consisting of an acryloyl group and a methacryloyl group; (C) a polymerization initiator; and (D) a compound represented by formula (1) [in the formula, Rrepresents a benzyl group or a 2-5C cyano alkyl group].

Description

  The present invention relates to a curable resin composition.

In a liquid crystal display device or the like, a coating film such as a color filter protective film is used as a member. The color filter protective film is used for flattening surface irregularities caused by the underlying color filter or black matrix, or for protecting the color filter or the like from a chemical solution used to form these upper layer members. It is a coating film. In order to form the color filter protective film, a curable resin composition is used.
As such a curable resin composition, for example, a curable resin composition containing a copolymer of an unsaturated carboxylic acid and an aliphatic polycyclic epoxy compound, dipentaerythritol hexaacrylate and a polymerization initiator is known. (Patent Document 1).

JP 2010-152335 A

  A coating film or pattern formed by using the above-described curable resin composition that has been conventionally known is not necessarily sufficiently high in heat resistance and may be easily colored by heat treatment.

［式（１）中、Ｒ^１は、ベンジル基又は炭素数２〜５のシアノアルキル基を表し、
Ｒ^２〜Ｒ^４は、互いに独立に、水素原子、ハロゲン原子、炭素数１〜２０のアルキル基、フェニル基、ニトロ基又は炭素数１〜２０のアシル基を表し、該アルキル基及び該フェニル基に含まれる水素原子は、ヒドロキシ基で置換されていてもよい］。
［２］（Ｄ）の含有量が、（Ａ）１００質量部に対して１質量部以上２５質量部以下である前記［１］記載の硬化性樹脂組成物。
［３］前記［１］又は［２］記載の硬化性樹脂組成物により形成される塗膜。
［４］前記［３］記載の塗膜を含む表示装置。 The present invention provides the following [1] to [4].
[1] Curable resin composition containing the following (A), (B), (C) and (D):
(A) An addition polymer (B) containing a structural unit derived from at least one selected from the group consisting of an unsaturated carboxylic acid and an unsaturated carboxylic acid anhydride, and a structural unit derived from an unsaturated compound having an oxiranyl group ) A compound having at least one group selected from the group consisting of an acryloyl group and a methacryloyl group (C) a polymerization initiator (D) a compound represented by formula (1)

[In formula (1), ^{R 1} represents a benzyl group or a cyanoalkyl group having 2 to 5 carbon atoms,
R ^{2 to} R ⁴ each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a phenyl group, a nitro group, or an acyl group having 1 to 20 carbon atoms, and the alkyl group and the phenyl group The hydrogen atom contained in may be substituted with a hydroxy group.
[2] The curable resin composition according to [1], wherein the content of (D) is 1 part by mass or more and 25 parts by mass or less with respect to 100 parts by mass of (A).
[3] A coating film formed from the curable resin composition according to [1] or [2].
[4] A display device including the coating film according to [3].

  According to the curable resin composition of the present invention, it is possible to form a coating film or pattern that is less colored by heat treatment and has excellent heat resistance.

Hereinafter, the present invention will be described in detail.
The curable resin composition of the present invention includes a structural unit derived from at least one selected from the group consisting of an unsaturated carboxylic acid and an unsaturated carboxylic acid anhydride, and a structural unit derived from an unsaturated compound having an oxiranyl group. An addition polymer (hereinafter sometimes referred to as “polymer (A)”).

As the polymer (A), for example,
Polymer [A1]: at least one (a) selected from the group consisting of an unsaturated carboxylic acid and an unsaturated carboxylic acid anhydride (hereinafter sometimes referred to as “(a)”), and an unsaturated group having an oxiranyl group A copolymer obtained by polymerizing the compound (b) (hereinafter sometimes referred to as “(b)”);
Polymer [A2]: (a) and (b), monomer (c) copolymerizable with (a) and (b) (however, a monomer different from (a) and (b)) (Hereinafter, referred to as “(c)” in some cases)
Etc.

Specific examples of (a) include unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, o-vinylbenzoic acid, m-vinylbenzoic acid, and p-vinylbenzoic acid;
Maleic acid, fumaric acid, citraconic acid, mesaconic acid, itaconic acid, 3-vinylphthalic acid, 4-vinylphthalic acid, 3,4,5,6-tetrahydrophthalic acid, 1,2,3,6-tetrahydrophthalic acid, dimethyl Unsaturated dicarboxylic acids such as tetrahydrophthalic acid and 1,4-cyclohexene dicarboxylic acid;
Methyl-5-norbornene-2,3-dicarboxylic acid, 5-carboxybicyclo [2.2.1] hept-2-ene, 5,6-dicarboxybicyclo [2.2.1] hept-2-ene, 5-carboxy-5-methylbicyclo [2.2.1] hept-2-ene, 5-carboxy-5-ethylbicyclo [2.2.1] hept-2-ene, 5-carboxy-6-methylbicyclo Bicyclounsaturated compounds containing a carboxy group such as [2.2.1] hept-2-ene, 5-carboxy-6-ethylbicyclo [2.2.1] hept-2-ene;
Maleic anhydride, citraconic anhydride, itaconic anhydride, 3-vinylphthalic anhydride, 4-vinylphthalic anhydride, 3,4,5,6-tetrahydrophthalic anhydride, 1,2,3,6- Unsaturated dicarboxylic acid anhydrides such as tetrahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, 5,6-dicarboxybicyclo [2.2.1] hept-2-ene anhydride;

Unsaturated mono [(meth) acryloyloxyalkyl] esters of polyvalent carboxylic acids such as succinic acid mono [2- (meth) acryloyloxyethyl] and phthalic acid mono [2- (meth) acryloyloxyethyl] Kind;
Examples thereof include unsaturated acrylates containing a hydroxy group and a carboxy group in the same molecule, such as α- (hydroxymethyl) acrylic acid.
Of these, acrylic acid, methacrylic acid, maleic anhydride and the like are preferably used from the viewpoint of copolymerization reactivity and alkali solubility.
In this specification, “(meth) acrylic acid” represents at least one selected from the group consisting of acrylic acid and methacrylic acid. Notations such as “(meth) acryloyl” and “(meth) acrylate” have the same meaning.

In the present invention, the unsaturated compound (b) having an oxiranyl group refers to a monomer having an oxirane ring and an unsaturated bond. As (b), for example, a monomer (b1) having a structure in which a chain aliphatic unsaturated hydrocarbon is epoxidized and an ethylenically unsaturated bond (hereinafter sometimes referred to as “(b1)”) or And a monomer (b2) having a structure in which an alicyclic unsaturated hydrocarbon is epoxidized and an ethylenically unsaturated bond (hereinafter sometimes referred to as “(b2)”).
In the present invention, (b) is preferably a monomer having an oxiranyl group and an ethylenically unsaturated bond, and more preferably a monomer having an oxiranyl group and a (meth) acryloyloxy group. . Further, (b) is preferably (b2).

  Specific examples of (b1) include glycidyl (meth) acrylate, β-methylglycidyl (meth) acrylate, β-ethylglycidyl (meth) acrylate, glycidyl vinyl ether, o-vinylbenzyl glycidyl ether, m-vinylbenzyl glycidyl. Ether, p-vinylbenzyl glycidyl ether, α-methyl-o-vinylbenzyl glycidyl ether, α-methyl-m-vinylbenzyl glycidyl ether, α-methyl-p-vinylbenzyl glycidyl ether, 2,3-bis (glycidyloxy) Methyl) styrene, 2,4-bis (glycidyloxymethyl) styrene, 2,5-bis (glycidyloxymethyl) styrene, 2,6-bis (glycidyloxymethyl) styrene, 2,3,4-tris (glycidyloxy) Methyl ) Styrene, 2,3,5-tris (glycidyloxymethyl) styrene, 2,3,6-tris (glycidyloxymethyl) styrene, 3,4,5-tris (glycidyloxymethyl) styrene, 2,4,6 -Tris (glycidyloxymethyl) styrene, compounds described in JP-A-7-248625, and the like.

  Examples of (b2) include vinylcyclohexene monooxide, 1,2-epoxy-4-vinylcyclohexane (for example, Celoxide 2000; manufactured by Daicel Chemical Industries, Ltd.), 3,4-epoxycyclohexylmethyl acrylate (for example, cyclomer A400). Manufactured by Daicel Chemical Industries, Ltd.), 3,4-epoxycyclohexylmethyl methacrylate (for example, Cyclomer M100; manufactured by Daicel Chemical Industries, Ltd.), a compound represented by formula (I), and formula (II) And the like.

In the formula (I) and the formula (II), R ¹ and R ² each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and the hydrogen atom contained in the alkyl group is a hydroxy group May be substituted.
X ¹ and X ² each independently represent a single bond, —R ³ —, * —R ³ —O—, * —R ³ —S—, or * —R ³ —NH—.
R ³ represents an alkanediyl group having 1 to 6 carbon atoms.
* Represents a bond with O.

Specific examples of the alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, and a tert-butyl group.
As the hydroxyalkyl group, a hydroxymethyl group, 1-hydroxyethyl group, 2-hydroxyethyl group, 1-hydroxypropyl group, 2-hydroxypropyl group, 3-hydroxypropyl group, 1-hydroxy-1-methylethyl group, Examples include 2-hydroxy-1-methylethyl group, 1-hydroxybutyl group, 2-hydroxybutyl group, 3-hydroxybutyl group, 4-hydroxybutyl group and the like.
R ¹ and R ² are preferably a hydrogen atom, a methyl group, a hydroxymethyl group, a 1-hydroxyethyl group, and a 2-hydroxyethyl group, and more preferably a hydrogen atom and a methyl group.

Examples of alkanediyl groups include methylene group, ethylene group, propane-1,2-diyl group, propane-1,3-diyl group, butane-1,4-diyl group, pentane-1,5-diyl group, hexane- Examples include 1,6-diyl group.
X ¹ and X ² are preferably a single bond, a methylene group, an ethylene group, * —CH ₂ —O— (* represents a bond to O), or * —CH ₂ CH ₂ —O— group. More preferably, a single bond and a * —CH ₂ CH ₂ —O— group are mentioned.

  Examples of the compound represented by the formula (I) include compounds represented by the formula (I-1) to the formula (I-15). Preferably Formula (I-1), Formula (I-3), Formula (I-5), Formula (I-7), Formula (I-9), Formula (I-11) to Formula (I-15) Is mentioned. More preferably, Formula (I-1), Formula (I-7), Formula (I-9), and Formula (I-15) are mentioned.

Examples of the compound represented by the formula (II) include compounds represented by the formula (II-1) to the formula (II-15). Preferably Formula (II-1), Formula (II-3), Formula (II-5), Formula (II-7), Formula (II-9), Formula (II-11) to Formula (II-15) Is mentioned.
More preferably, Formula (II-1), Formula (II-7), Formula (II-9), and Formula (II-15) are mentioned.

  The compound represented by formula (I) and the compound represented by formula (II) may be used alone or in combination of two or more. When the compound represented by formula (I) and the compound represented by formula (II) are used in combination, the ratio [formula (I): formula (II)] (molar ratio) is arbitrary, but preferably 5:95 to 95: 5, more preferably 10:90 to 90:10, and particularly preferably 20:80 to 80:20.

Examples of (c) include (meth) acrylic acid such as methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, sec-butyl (meth) acrylate, and tert-butyl (meth) acrylate. Alkyl esters;
Cyclohexyl (meth) acrylate, 2-methylcyclohexyl (meth) acrylate, tricyclo [5.2.1.0 ^2,6 ] decan-8-yl (meth) acrylate (in this technical field, dicyclopenta It is said to be nyl (meth) acrylate.
), (Meth) acrylic acid cycloalkyl esters such as dicyclopentanyloxyethyl (meth) acrylate and isobornyl (meth) acrylate;

Aryl (meth) acrylates or aralkyl esters such as phenyl (meth) acrylate and benzyl (meth) acrylate;
Dicarboxylic acid diesters such as diethyl maleate, diethyl fumarate, diethyl itaconate;
(Meth) acrylic acid hydroxyalkyl esters such as 2-hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate;

  Bicyclo [2.2.1] hept-2-ene, 5-methylbicyclo [2.2.1] hept-2-ene, 5-ethylbicyclo [2.2.1] hept-2-ene, 5- Hydroxybicyclo [2.2.1] hept-2-ene, 5-hydroxymethylbicyclo [2.2.1] hept-2-ene, 5- (2′-hydroxyethyl) bicyclo [2.2.1] Hept-2-ene, 5-methoxybicyclo [2.2.1] hept-2-ene, 5-ethoxybicyclo [2.2.1] hept-2-ene, 5,6-dihydroxybicyclo [2.2 .1] Hept-2-ene, 5,6-di (hydroxymethyl) bicyclo [2.2.1] hept-2-ene, 5,6-di (2′-hydroxyethyl) bicyclo [2.2. 1] hept-2-ene, 5,6-dimethoxybicyclo [2. .1] hept-2-ene, 5,6-diethoxybicyclo [2.2.1] hept-2-ene, 5-hydroxy-5-methylbicyclo [2.2.1] hept-2-ene, 5-hydroxy-5-ethylbicyclo [2.2.1] hept-2-ene, 5-hydroxymethyl-5-methylbicyclo [2.2.1] hept-2-ene, 5-tert-butoxycarbonylbicyclo [2.2.1] hept-2-ene, 5-cyclohexyloxycarbonylbicyclo [2.2.1] hept-2-ene, 5-phenoxycarbonylbicyclo [2.2.1] hept-2-ene, 5,6-bis (tert-butoxycarbonyl) bicyclo [2.2.1] hept-2-ene, 5,6-bis (cyclohexyloxycarbonyl) bicyclo [2.2.1] hept-2-ene Bicyclo unsaturated compounds;

  N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, N-succinimidyl-3-maleimidobenzoate, N-succinimidyl-4-maleimidobutyrate, N-succinimidyl-6-maleimidocaproate, N-succinimidyl-3 -Dicarbonylimide derivatives such as maleimide propionate, N- (9-acridinyl) maleimide;

Styrenes such as styrene, α-methylstyrene, m-methylstyrene, p-methylstyrene, vinyltoluene, p-methoxystyrene;
Acrylonitriles such as acrylonitrile and methacrylonitrile; Vinyl compounds such as vinyl chloride, vinylidene chloride and vinyl acetate; Acrylamides such as acrylamide and methacrylamide; 1,3-butadiene, isoprene, 2,3-dimethyl-1,3 -Diene compounds such as butadiene;
3-methyl-3-methacryloyloxymethyloxetane, 3-methyl-3-acryloyloxymethyloxetane, 3-ethyl-3-methacryloyloxymethyloxetane, 3-ethyl-3-acryloyloxymethyloxetane, 3-methyl-3 Oxetanyl group-containing (meth) acrylic esters such as methacryloyloxyethyl oxetane, 3-methyl-3-acryloyloxyethyl oxetane, 3-ethyl-3-methacryloyloxyethyl oxetane, 3-ethyl-3-acryloyloxyethyl oxetane ;
Examples include tetrahydrofurfuryl acrylate (for example, Biscoat V # 150, manufactured by Osaka Organic Chemical Industry Co., Ltd.), tetrahydrofuryl group-containing (meth) acrylic acid esters such as tetrahydrofurfuryl methacrylate, and the like.

  Of these, styrene, N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, bicyclo [2.2.1] hept-2-ene and the like are preferable from the viewpoint of copolymerization reactivity and alkali solubility.

In the polymer [A1], the ratio of the structural unit derived from each monomer is preferably in the following range with respect to the total number of moles of the structural unit constituting the polymer [A1].
Structural unit derived from (a); 5 to 60 mol% (more preferably 10 to 50 mol%)
Structural unit derived from (b); 40 to 95 mol% (more preferably 50 to 90 mol%)
When the ratio of the structural unit of the polymer [A1] is in the above range, the storage stability, the chemical resistance of the resulting coating film, the heat resistance, and the mechanical strength tend to be excellent.

  The polymer [A1] can be obtained by, for example, the method described in the document “Experimental Method for Polymer Synthesis” (Takayuki Otsu Publishing Co., Ltd., Chemical Dojin Co., Ltd., First Edition, First Edition, issued March 1, 1972) and It can manufacture with reference to the cited reference described in literature.

  Specifically, a predetermined amount of (a) and (b), a polymerization initiator, a solvent, and the like are charged into a reaction vessel, and the oxygen is replaced with nitrogen, thereby stirring, heating, and keeping temperature in a deoxygenated atmosphere. A method is illustrated. In addition, the polymerization initiator, the solvent, and the like used here are not particularly limited, and any of those usually used in the field can be used. For example, as polymerization initiators, azo compounds (2,2′-azobisisobutyronitrile, 2,2′-azobis (2,4-dimethylvaleronitrile), etc.) and organic peroxides (benzoyl peroxide, etc.) Any solvent may be used as long as it dissolves each monomer, and a solvent described later can be used as the solvent (E) of the curable resin composition of the present invention.

  In addition, the obtained copolymer may use the solution after reaction as it is, a concentrated or diluted solution may be used, and it took out as solid (powder) by methods, such as reprecipitation. Things may be used. In particular, by using the same solvent as the solvent (E) described later as the solvent in this polymerization, the solution after the reaction can be used as it is for the preparation of the curable resin composition. The manufacturing process of a thing can be simplified.

In the polymer [A2], the ratio of the structural unit derived from each monomer is preferably in the following range with respect to the total number of moles of all the structural units constituting the polymer [A2].
Structural unit derived from (a); 2 to 40 mol% (more preferably 5 to 35 mol%)
Structural unit derived from (b); 2-95 mol% (more preferably 5-80 mol%)
Structural unit derived from (c): 1 to 65 mol% (more preferably 1 to 60 mol%)
The total of the structural unit derived from (a) and the structural unit derived from (b) is preferably 70 to 99 mol% with respect to the total number of moles of all structural units constituting the polymer [A2]. 90 to 99 mol% is more preferable.
When the ratio of the structural unit of the polymer [A2] is in the above range, the storage stability, the chemical resistance of the resulting coating film, the heat resistance, and the mechanical strength tend to be excellent.
The polymer [A2] can be produced by the same method as the polymer [A1].

  Specific examples of the polymer [A1] include (meth) acrylic acid / copolymer of formula (I-1), (meth) acrylic acid / copolymer of formula (I-2), and (meth) acrylic acid. / Copolymer of formula (I-3), (meth) acrylic acid / copolymer of formula (I-4), (meth) acrylic acid / copolymer of formula (I-5), (meth) acrylic Acid / copolymer of formula (I-6), (meth) acrylic acid / copolymer of formula (I-7), (meth) acrylic acid / copolymer of formula (I-8), (meth) Acrylic acid / copolymer of formula (I-9), (meth) acrylic acid / copolymer of formula (I-10), (meth) acrylic acid / copolymer of formula (I-11), (meta ) Acrylic acid / copolymer of formula (I-12), (meth) acrylic acid / copolymer of formula (I-13), (meth) acrylic acid / copolymer of formula (I-14), ( Meta) Copolymer of crylic acid / formula (I-15), copolymer of (meth) acrylic acid / formula (II-1), copolymer of (meth) acrylic acid / formula (II-2), (meth ) Acrylic acid / copolymer of formula (II-3), (meth) acrylic acid / copolymer of formula (II-4), (meth) acrylic acid / copolymer of formula (II-5), (Meth) acrylic acid / copolymer of formula (II-6), (meth) acrylic acid / copolymer of formula (II-7), (meth) acrylic acid / copolymer of formula (II-8), (Meth) acrylic acid / copolymer of formula (II-9), (meth) acrylic acid / copolymer of formula (II-10), (meth) acrylic acid / copolymer of formula (II-11) , (Meth) acrylic acid / copolymer of formula (II-12), (meth) acrylic acid / copolymer of formula (II-13), (meth) acrylic acid / formula A copolymer of (II-14), a copolymer of (meth) acrylic acid / formula (II-15), a copolymer of (meth) acrylic acid / formula (I-1) / formula (II-1), (Meth) acrylic acid / copolymer of formula (I-2) / formula (II-2), copolymer of (meth) acrylic acid / formula (I-3) / formula (II-3), (meta ) Acrylic acid / copolymer of formula (I-4) / formula (II-4), (meth) acrylic acid / copolymer of formula (I-5) / copolymer of formula (II-5), (meth) acrylic Acid / copolymer of formula (I-6) / formula (II-6), (meth) acrylic acid / copolymer of formula (I-7) / copolymer of formula (II-7), (meth) acrylic acid / Copolymer of formula (I-8) / formula (II-8), (meth) acrylic acid / copolymer of formula (I-9) / copolymer of formula (II-9), (meth) acrylic acid / formula ( I-10) / of formula (II-10) Copolymer, (meth) acrylic acid / copolymer of formula (I-11) / formula (II-11), (meth) acrylic acid / copolymer of formula (I-12) / formula (II-12) Coalesced, copolymer of (meth) acrylic acid / formula (I-13) / formula (II-13), copolymer of (meth) acrylic acid / formula (I-14) / formula (II-14), (Meth) acrylic acid / copolymer of formula (I-15) / formula (II-15), (meth) acrylic acid / copolymer of formula (I-1) / formula (I-7), (meta ) Acrylic acid / copolymer of formula (I-1) / formula (II-7), crotonic acid / copolymer of formula (I-1), crotonic acid / copolymer of formula (I-2), Crotonic acid / copolymer of formula (I-3), crotonic acid / copolymer of formula (I-4), crotonic acid / copolymer of formula (I-5), crotonic acid / formula (I-6) ) Copolymer, Tonic acid / copolymer of formula (I-7), crotonic acid / copolymer of formula (I-8), crotonic acid / copolymer of formula (I-9), crotonic acid / formula (I-10) ), Crotonic acid / copolymer of formula (I-11), crotonic acid / copolymer of formula (I-12), crotonic acid / copolymer of formula (I-13), crotonic acid / Copolymer of formula (I-14), crotonic acid / copolymer of formula (I-15), crotonic acid / copolymer of formula (II-1), crotonic acid / copolymer of formula (II-2) Copolymer, crotonic acid / copolymer of formula (II-3), crotonic acid / copolymer of formula (II-4), crotonic acid / copolymer of formula (II-5), crotonic acid / formula (II-6) copolymer, crotonic acid / copolymer of formula (II-7), crotonic acid / copolymer of formula (II-8), crotonic acid / copolymer of formula (II-9) Polymer, crotonic acid / copolymer of formula (II-10), crotonic acid / copolymer of formula (II-11), crotonic acid / copolymer of formula (II-12), crotonic acid / formula ( II-13), crotonic acid / copolymer of formula (II-14), crotonic acid / copolymer of formula (II-15), maleic acid / copolymer of formula (I-1) , Maleic acid / copolymer of formula (I-2), maleic acid / copolymer of formula (I-3), maleic acid / copolymer of formula (I-4), maleic acid / formula (I- 5), maleic acid / copolymer of formula (I-6), maleic acid / copolymer of formula (I-7), maleic acid / copolymer of formula (I-8), malein Acid / copolymer of formula (I-9), maleic acid / copolymer of formula (I-10), maleic acid / copolymer of formula (I-11), maleic acid / formula (I -12), maleic acid / copolymer of formula (I-13), maleic acid / copolymer of formula (I-14), maleic acid / copolymer of formula (I-15), Maleic acid / copolymer of formula (II-1), maleic acid / copolymer of formula (II-2), maleic acid / copolymer of formula (II-3), maleic acid / formula (II-4) ), Maleic acid / copolymer of formula (II-5), maleic acid / copolymer of formula (II-6), maleic acid / copolymer of formula (II-7), maleic acid / Copolymer of formula (II-8), maleic acid / copolymer of formula (II-9), maleic acid / copolymer of formula (II-10), maleic acid / copolymer of formula (II-11) Copolymer, maleic acid / copolymer of formula (II-12), maleic acid / copolymer of formula (II-13), maleic acid / copolymer of formula (II-14) Polymer, maleic acid / copolymer of formula (II-15), (meth) acrylic acid / maleic anhydride / copolymer of formula (I-1), (meth) acrylic acid / maleic anhydride / Copolymer of formula (I-2), (meth) acrylic acid / maleic anhydride / copolymer of formula (I-3), (meth) acrylic acid / maleic anhydride / formula (I-4) A copolymer of (meth) acrylic acid / maleic anhydride / copolymer of formula (I-5), a copolymer of (meth) acrylic acid / maleic anhydride / formula (I-6), (Meth) acrylic acid / maleic anhydride / copolymer of formula (I-7), (meth) acrylic acid / maleic anhydride / copolymer of formula (I-8), (meth) acrylic acid / maleic Acid anhydride / copolymer of formula (I-9), (meth) acrylic acid / maleic anhydride / copolymer of formula (I-10) , (Meth) acrylic acid / maleic anhydride / copolymer of formula (I-11), (meth) acrylic acid / maleic anhydride / copolymer of formula (I-12), (meth) acrylic Acid / maleic anhydride / copolymer of formula (I-13), (meth) acrylic acid / maleic anhydride / copolymer of formula (I-14), (meth) acrylic acid / maleic anhydride / Copolymer of formula (I-15), (meth) acrylic acid / maleic anhydride / copolymer of formula (II-1), (meth) acrylic acid / maleic anhydride / formula (II-2) ), (Meth) acrylic acid / maleic anhydride / copolymer of formula (II-3), (meth) acrylic acid / maleic anhydride / copolymer of formula (II-4), (Meth) acrylic acid / maleic anhydride / copolymer of formula (II-5), (meth) acrylic acid / ma Rain acid anhydride / copolymer of formula (II-6), (meth) acrylic acid / maleic anhydride / copolymer of formula (II-7), (meth) acrylic acid / maleic anhydride / formula (II-8) copolymer, (meth) acrylic acid / maleic anhydride / copolymer of formula (II-9), (meth) acrylic acid / maleic anhydride / formula (II-10) Copolymer, (meth) acrylic acid / maleic anhydride / copolymer of formula (II-11), (meth) acrylic acid / maleic anhydride / copolymer of formula (II-12), ) Acrylic acid / maleic anhydride / copolymer of formula (II-13), (meth) acrylic acid / maleic anhydride / copolymer of formula (II-14), (meth) acrylic acid / maleic acid And an anhydride / copolymer of formula (II-15).

  Specific examples of the polymer [A2] include a copolymer of (meth) acrylic acid / formula (I-1) / methyl (meth) acrylate, (meth) acrylic acid / formula (I-2) / methyl (meth) ) Acrylate copolymer, (meth) acrylic acid / formula (I-3) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (I-4) / methyl (meth) acrylate copolymer Polymer, copolymer of (meth) acrylic acid / formula (I-5) / methyl (meth) acrylate, copolymer of (meth) acrylic acid / formula (I-6) / methyl (meth) acrylate, ( (Meth) acrylic acid / copolymer of formula (I-7) / methyl (meth) acrylate, (meth) acrylic acid / copolymer of formula (I-8) / methyl (meth) acrylate, (meth) acrylic acid / Formula (I-9) / Methyl (meth) acrylate A copolymer of (meth) acrylic acid / formula (I-10) / methyl (meth) acrylate, a copolymer of (meth) acrylic acid / formula (I-11) / methyl (meth) acrylate , (Meth) acrylic acid / copolymer of formula (I-12) / methyl (meth) acrylate, (meth) acrylic acid / copolymer of formula (I-13) / methyl (meth) acrylate, (meth) Acrylic acid / formula (I-14) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (I-15) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II-1) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II-2) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II-3) ) / Methyl (meta) acrylate Copolymer of (meth) acrylic acid / formula (II-4) / methyl (meth) acrylate, copolymer of (meth) acrylic acid / formula (II-5) / methyl (meth) acrylate , (Meth) acrylic acid / copolymer of formula (II-6) / methyl (meth) acrylate, (meth) acrylic acid / copolymer of formula (II-7) / methyl (meth) acrylate, (meth) Acrylic acid / formula (II-8) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II-9) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II-10) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II-11) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II-12) ) / Methyl (meth) acryl Rate copolymer, (meth) acrylic acid / formula (II-13) / methyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II-14) / methyl (meth) acrylate copolymer Copolymer, copolymer of (meth) acrylic acid / formula (II-15) / methyl (meth) acrylate, copolymer of (meth) acrylic acid / formula (I-1) / dicyclopentanyl (meth) acrylate , (Meth) acrylic acid / formula (II-1) / dicyclopentanyl (meth) acrylate copolymer, (meth) acrylic acid / formula (I-1) / formula (II-1) / dicyclopenta Nyl (meth) acrylate copolymer, crotonic acid / formula (I-1) / dicyclopentanyl (meth) acrylate copolymer, maleic acid / formula (I-1) / dicyclopentanyl (meth) Acrylate copolymer Copolymer of (meth) acrylic acid / maleic anhydride / formula (I-1) / dicyclopentanyl (meth) acrylate, (meth) acrylic acid / formula (I-1) / methyl (meth) acrylate / Dicyclopentanyl (meth) acrylate copolymer, Crotonic acid / Formula (II-1) / Dicyclopentanyl (meth) acrylate copolymer, Maleic acid / Formula (II-1) / Dicyclopentanyl (Meth) acrylate copolymer, (meth) acrylic acid / maleic anhydride / formula (II-1) / dicyclopentanyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II- 1) / methyl (meth) acrylate / dicyclopentanyl (meth) acrylate copolymer, (meth) acrylic acid / formula (I-1) / phenyl (meth) acrylate copolymer, T) Copolymer of acrylic acid / formula (II-1) / phenyl (meth) acrylate, (meth) acrylic acid / formula (I-1) / formula (II-1) / phenyl (meth) acrylate Copolymer, Crotonic acid / copolymer of formula (I-1) / phenyl (meth) acrylate, Copolymer of maleic acid / formula (I-1) / phenyl (meth) acrylate, (meth) acrylic acid / maleic acid Copolymer of anhydride / formula (I-1) / phenyl (meth) acrylate, copolymer of (meth) acrylic acid / formula (I-1) / methyl (meth) acrylate / phenyl (meth) acrylate, croton Copolymer of acid / formula (II-1) / phenyl (meth) acrylate, copolymer of maleic acid / formula (II-1) / phenyl (meth) acrylate, (meth) acrylic acid / maleic anhydride / formula( II-1) / phenyl (meth) acrylate copolymer, (meth) acrylic acid / formula (II-1) / methyl (meth) acrylate / phenyl (meth) acrylate copolymer, (meth) acrylic acid / Copolymer of formula (I-1) / diethyl maleate, (meth) acrylic acid / copolymer of formula (II-1) / diethyl maleate, (meth) acrylic acid / formula (I-1) / formula (II-1) / diethyl maleate copolymer, crotonic acid / copolymer of formula (I-1) / diethyl maleate, maleic acid / copolymer of formula (I-1) / diethyl maleate, Copolymer of (meth) acrylic acid / maleic anhydride / formula (I-1) / diethyl maleate, (meth) acrylic acid / formula (I-1) / methyl (meth) acrylate / diethyl maleate Polymer, crotonic acid / formula II-1) / diethyl maleate copolymer, maleic acid / formula (II-1) / diethyl maleate copolymer, (meth) acrylic acid / maleic anhydride / formula (II-1) / maleic Copolymer of diethyl acid, (meth) acrylic acid / formula (II-1) / methyl (meth) acrylate / diethyl maleate copolymer, (meth) acrylic acid / formula (I-1) / 2-hydroxy Copolymer of ethyl (meth) acrylate, copolymer of (meth) acrylic acid / formula (II-1) / 2-hydroxyethyl (meth) acrylate, (meth) acrylic acid / formula (I-1) / formula (II-1) / 2-hydroxyethyl (meth) acrylate copolymer, crotonic acid / copolymer of formula (I-1) / 2-hydroxyethyl (meth) acrylate, maleic acid / formula (I-1 ) / 2-Hi Roxyethyl (meth) acrylate copolymer, (meth) acrylic acid / maleic anhydride / copolymer of formula (I-1) / 2-hydroxyethyl (meth) acrylate, (meth) acrylic acid / formula (I -1) / methyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate copolymer, crotonic acid / formula (II-1) / 2-hydroxyethyl (meth) acrylate copolymer, maleic acid / formula (II-1) / 2-hydroxyethyl (meth) acrylate copolymer, (meth) acrylic acid / maleic anhydride / copolymer of formula (II-1) / 2-hydroxyethyl (meth) acrylate, (Meth) acrylic acid / copolymer of formula (II-1) / methyl (meth) acrylate / 2-hydroxyethyl (meth) acrylate, (meth) acrylic acid / formula (I-1) / bicyclo [2.2.1] hept-2-ene copolymer, (meth) acrylic acid / formula (II-1) / bicyclo [2.2.1] hept-2-ene Copolymer of (meth) acrylic acid / formula (I-1) / formula (II-1) / bicyclo [2.2.1] hept-2-ene, crotonic acid / formula (I- 1) / bicyclo [2.2.1] hept-2-ene copolymer, maleic acid / formula (I-1) / bicyclo [2.2.1] hept-2-ene copolymer, (Meth) acrylic acid / maleic anhydride / copolymer of formula (I-1) / bicyclo [2.2.1] hept-2-ene, (meth) acrylic acid / formula (I-1) / methyl ( (Meth) acrylate / bicyclo [2.2.1] hept-2-ene copolymer, crotonic acid / formula (II-1) / bicyclo [2.2.1] To-2-ene copolymer, maleic acid / formula (II-1) / bicyclo [2.2.1] hept-2-ene copolymer, (meth) acrylic acid / maleic anhydride / formula (II-1) / bicyclo [2.2.1] hept-2-ene copolymer, (meth) acrylic acid / formula (II-1) / methyl (meth) acrylate / bicyclo [2.2.1 ] Hept-2-ene copolymer, (meth) acrylic acid / formula (I-1) / N-cyclohexylmaleimide copolymer, (meth) acrylic acid / formula (II-1) / N-cyclohexylmaleimide Copolymer of (meth) acrylic acid / formula (I-1) / formula (II-1) / N-cyclohexylmaleimide, corotonic acid / formula (I-1) / N-cyclohexylmaleimide Polymer, maleic acid / formula (I-1) / N-cyclohe Copolymer of silmaleimide, copolymer of (meth) acrylic acid / maleic anhydride / formula (I-1) / N-cyclohexylmaleimide, (meth) acrylic acid / formula (I-1) / methyl (meta ) Copolymer of acrylate / N-cyclohexylmaleimide, copolymer of crotonic acid / formula (II-1) / N-cyclohexylmaleimide, copolymer of maleic acid / formula (II-1) / N-cyclohexylmaleimide, Copolymer of (meth) acrylic acid / maleic anhydride / formula (II-1) / N-cyclohexylmaleimide, (meth) acrylic acid / formula (II-1) / methyl (meth) acrylate / N-cyclohexylmaleimide A copolymer of (meth) acrylic acid / formula (I-1) / styrene, a copolymer of (meth) acrylic acid / formula (II-1) / styrene, ( (Meth) acrylic acid / formula (I-1) / formula (II-1) / styrene copolymer, crotonic acid / formula (I-1) / styrene copolymer, maleic acid / formula (I-1) / Styrene copolymer, (meth) acrylic acid / maleic anhydride / formula (I-1) / styrene copolymer, (meth) acrylic acid / formula (I-1) / methyl (meth) acrylate / Styrene copolymer, Crotonic acid / Formula (II-1) / Styrene copolymer, Maleic acid / Formula (II-1) / Styrene copolymer, (Meth) acrylic acid / Maleic anhydride / Formula (II-1) / styrene copolymer, (meth) acrylic acid / formula (II-1) / methyl (meth) acrylate / styrene copolymer, (meth) acrylic acid / formula (I-1) / N-cyclohexylmaleimide / styrene copolymer, (meth) acrylic Copolymer of acid / formula (II-1) / N-cyclohexylmaleimide / styrene, copolymer of (meth) acrylic acid / formula (I-1) / formula (II-1) / N-cyclohexylmaleimide / styrene Crotonic acid / copolymer of formula (I-1) / N-cyclohexylmaleimide / styrene, maleic acid / copolymer of formula (I-1) / N-cyclohexylmaleimide / styrene, (meth) acrylic acid / maleic Copolymer of acid anhydride / formula (I-1) / N-cyclohexylmaleimide / styrene, (meth) acrylic acid / formula (I-1) / methyl (meth) acrylate / N-cyclohexylmaleimide / styrene Copolymer, copolymer of crotonic acid / formula (II-1) / N-cyclohexylmaleimide / styrene, maleic acid / formula (II-1) / N-cyclohexylmale Copolymer of imide / styrene, copolymer of (meth) acrylic acid / maleic anhydride / formula (II-1) / N-cyclohexylmaleimide / styrene, (meth) acrylic acid / formula (II-1) / Examples thereof include a methyl (meth) acrylate / N-cyclohexylmaleimide / styrene copolymer.

  The polystyrene equivalent weight average molecular weight of the polymer (A) is preferably 3,000 to 100,000, more preferably 5,000 to 50,000, and further preferably 5,000 to 25,000. It is particularly preferably 5,000 to 15,000. When the weight average molecular weight of the polymer (A) is in the above range, the coating property tends to be good.

  The molecular weight distribution [weight average molecular weight (Mw) / number average molecular weight (Mn)] of the polymer (A) is preferably 1.1 to 6.0, and more preferably 1.2 to 4.0. When the molecular weight distribution is in the above range, the obtained coating film tends to be excellent in chemical resistance.

  The acid value of the polymer (A) is preferably from 30 mg-KOH / g to 180 mg-KOH / g, more preferably from 40 mg-KOH / g to 150 mg-KOH / g, particularly preferably from 50 mg-KOH / g. g or more and 135 mg-KOH / g or less. Here, the acid value is a value measured as the amount (mg) of potassium hydroxide necessary to neutralize 1 g of the polymer, and can be determined by titration using an aqueous potassium hydroxide solution. When the acid value of the polymer (A) is in the above range, the resulting coating film tends to have excellent adhesion to the substrate.

  The content of the polymer (A) is preferably 30 to 90 mass%, more preferably 40 to the total content of the polymer (A) and the (meth) acrylic compound (B). 80% by mass. When the content of the polymer (A) is in the above range, the resulting coating film tends to have good adhesion to the substrate and chemical resistance.

  The curable resin composition of the present invention is a compound (B) (hereinafter, referred to as “(meth) acryloyl group”) having at least one group selected from the group consisting of an acryloyl group and a methacryloyl group (hereinafter sometimes referred to as “(meth) acryloyl group”). It is preferable that it may include “(meth) acrylic compound (B)”.

  Examples of the (meth) acrylic compound (B) having one (meth) acryloyl group include the same compounds as those mentioned as the above (a), (b) and (c), and among them, (meth) acrylic acid Esters are preferred.

  Examples of the (meth) acrylic compound (B) having two (meth) acryloyl groups include 1,3-butanediol di (meth) acrylate, 1,3-butanediol (meth) acrylate, and 1,6-hexanediol diene. (Meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di Acrylate, bis (acryloyloxyethyl) ether of bisphenol A, ethoxylated bisphenol A di (meth) acrylate, propoxylated neopentyl glycol di (meth) acrylate, ethoxylated neopentyl glycol Ruji (meth) acrylate, 3-methyl-pentanediol di (meth) acrylate.

Examples of the (meth) acrylic compound (B) having three or more (meth) acryloyl groups include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) ) Acrylate, ethoxylated trimethylolpropane tri (meth) acrylate, propoxylated trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate , Tripentaerythritol tetra (meth) acrylate, tripentaerythritol penta (meth) acrylate, tripentaerythritol hexa (meth) acrylate, Pentaerythritol hepta (meth) acrylate, tripentaerythritol octa (meth) acrylate, reaction product of pentaerythritol tri (meth) acrylate and acid anhydride, reaction product of dipentaerythritol penta (meth) acrylate and acid anhydride, Reaction product of tripentaerythritol hepta (meth) acrylate and acid anhydride, caprolactone-modified trimethylolpropane tri (meth) acrylate, caprolactone-modified pentaerythritol tri (meth) acrylate, caprolactone-modified tris (2-hydroxyethyl) isocyanurate tri (Meth) acrylate, caprolactone-modified pentaerythritol tetra (meth) acrylate, caprolactone-modified dipentaerythritol penta (meth) acrylate, cap Lolactone-modified dipentaerythritol hexa (meth) acrylate, caprolactone-modified tripentaerythritol tetra (meth) acrylate, caprolactone-modified tripentaerythritol penta (meth) acrylate, caprolactone-modified tripentaerythritol hexa (meth) acrylate, caprolactone-modified tripentaerythritol hepta (Meth) acrylate, caprolactone modified tripentaerythritol octa (meth) acrylate, reaction product of caprolactone modified pentaerythritol tri (meth) acrylate and acid anhydride, caprolactone modified dipentaerythritol penta (meth) acrylate and acid anhydride Reaction product, caprolactone-modified tripentaerythritol hepta (meth) acrylate and acid anhydride And the like.
The (meth) acrylic compound (B) is preferably a (meth) acrylic compound (B) having three or more (meth) acryloyl groups, and more preferably dipentaerythritol hexa (meth) acrylate.

  The content of the (meth) acrylic compound (B) is preferably 10 to 233 parts by mass, more preferably 25 to 150 parts by mass with respect to 100 parts by mass of the polymer (A). When the content of the (meth) acrylic compound (B) is in the above range, the smoothness, reliability and mechanical strength of the resulting coating film tend to be good.

  The curable resin composition of the present invention preferably contains a polymerization initiator (C). The polymerization initiator (C) is not particularly limited as long as it is a compound that can initiate polymerization of the (meth) acrylic compound (B) by the action of light or heat, and a known polymerization initiator can be used. .

Examples of the polymerization initiator (C) include alkylphenone compounds, biimidazole compounds, triazine compounds, acylphosphine oxide compounds, and oxime compounds.
Among them, the polymerization initiator preferably includes at least one selected from the group consisting of a biimidazole compound, an alkylphenone compound, and an oxime compound, and particularly includes at least one selected from the group consisting of an oxime compound and a biimidazole compound. A polymerization initiator is more preferable. These polymerization initiators are particularly preferable because they tend to be highly sensitive.

  The alkylphenone compound is a compound having α-hydroxyalkylphenone, α-alkoxyalkylphenone or α- (N-substituted amino) alkylphenone as a partial structure, specifically, diethoxyacetophenone, 2-hydroxy -2-methyl-1-phenylpropan-1-one, benzyldimethyl ketal, 2-hydroxy-1- [4- (2-hydroxyethoxy) phenyl] -2-methylpropan-1-one, 2-hydroxy-1 -{4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] -phenyl} -2-methyl-propan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- (4 -Methylthiophenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethyl Ruamino-1- (4-morpholinophenyl) butan-1-one, 2- (2-methylbenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (3-methylbenzyl) -2 -Dimethylamino-1- (4-morpholinophenyl) butanone, 2- (4-methylbenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (2-ethylbenzyl) -2-dimethyl Amino-1- (4-morpholinophenyl) butanone, 2- (2-propylbenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (2-butylbenzyl) -2-dimethylamino- 1- (4-morpholinophenyl) butanone, 2- (2,3-dimethylbenzyl) -2-dimethylamino-1- (4-morpholinov Nyl) butanone, 2- (2,4-dimethylbenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (2-chlorobenzyl) -2-dimethylamino-1- (4-morpholino) Phenyl) butanone, 2- (2-bromobenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (3-chlorobenzyl) -2-dimethylamino-1- (4-morpholinophenyl) Butanone, 2- (4-chlorobenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (3-bromobenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (4-Bromobenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (2-methoxybenzyl) 2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (3-methoxybenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (4-methoxybenzyl) -2 -Dimethylamino-1- (4-morpholinophenyl) butanone, 2- (2-methyl-4-methoxybenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (2-methyl-4) -Bromobenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- (2-bromo-4-methoxybenzyl) -2-dimethylamino-1- (4-morpholinophenyl) butanone, 2- Hydroxy-2-methyl-1- [4- (1-methylvinyl) phenyl] propan-1-one oligomer, 2- (dimethylamino) -2 - [(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) phenyl] butan-1-one, and the like.

  Examples of the oxime compound include N-benzoyloxy-1- (4-phenylsulfanylphenyl) butan-1-one-2-imine, N-ethoxycarbonyloxy-1-phenylpropane-1-one-2-imine, N-benzoyloxy-1- (4-phenylsulfanylphenyl) octane-1-one-2-imine, N-acetoxy-1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazole-3- Yl] ethane-1-imine, N-acetoxy-1- [9-ethyl-6- {2-methyl-4- (3,3-dimethyl-2,4-dioxacyclopentanylmethyloxy) benzoyl}- 9H-carbazol-3-yl] ethane-1-imine and the like. Commercial products such as Irgacure OXE01, OXE02 (manufactured by BASF) and N-1919 (ADEKA) may be used.

  Examples of the biimidazole compound include 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenylbiimidazole and 2,2′-bis (2,3-dichlorophenyl) -4. , 4 ′, 5,5′-tetraphenylbiimidazole (see, for example, JP-A-6-75372 and JP-A-6-75373), 2,2′-bis (2-chlorophenyl) -4, 4 ′, 5,5′-tetraphenylbiimidazole, 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetra (alkoxyphenyl) biimidazole, 2,2′-bis ( 2-chlorophenyl) -4,4 ′, 5,5′-tetra (dialkoxyphenyl) biimidazole, 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetra (trialkoxy) Phenyl) biimidazole (for example, see JP-B-48-38403, JP-A-62-174204, etc.), and the phenyl group at the 4,4′5,5′-position is substituted with a carboalkoxy group. Examples thereof include imidazole compounds (for example, see JP-A-7-10913). Preferably, 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenylbiimidazole, 2,2′-bis (2,3-dichlorophenyl) -4,4 ′, 5 Examples include 5'-tetraphenylbiimidazole and 2,2'-bis (2,4-dichlorophenyl) -4,4 ', 5,5'-tetraphenylbiimidazole.

  Examples of the triazine compound include 2,4-bis (trichloromethyl) -6- (4-methoxyphenyl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- (4-methoxy Naphthyl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6-piperonyl-1,3,5-triazine, 2,4-bis (trichloromethyl) -6- (4-methoxystyryl) ) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- [2- (5-methylfuran-2-yl) ethenyl] -1,3,5-triazine, 2,4- Bis (trichloromethyl) -6- [2- (furan-2-yl) ethenyl] -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- [2- (4-diethylamino-2) -Methylphenyl) Sulfonyl] -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- [2- (3,4-dimethoxyphenyl) ethenyl] -1,3,5-triazine.

  Examples of the acylphosphine oxide compound include 2,4,6-trimethylbenzoyldiphenylphosphine oxide.

Furthermore, as the polymerization initiator (C), benzoin compounds such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether; benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl- Benzophenone compounds such as 4′-methyldiphenyl sulfide, 3,3 ′, 4,4′-tetra (tert-butylperoxycarbonyl) benzophenone, 2,4,6-trimethylbenzophenone; 9,10-phenanthrenequinone, Examples include quinone compounds such as 2-ethylanthraquinone and camphorquinone; 10-butyl-2-chloroacridone, benzyl, methyl phenylglyoxylate, and titanocene compounds. These are preferably used in combination with a polymerization initiation assistant (C1) described later.
Moreover, you may use the polymerization initiator which has the group which can raise | generate a chain transfer described in Tokushu 2002-544205 gazette.

  In the curable resin composition of the present invention, a polymerization initiation assistant (C1) may be used together with the above-described polymerization initiator (C). The polymerization initiation assistant (C1) is a compound or sensitizer that is used in combination with the polymerization initiator (C) and is used to accelerate the polymerization of the polymerizable compound that has been polymerized by the polymerization initiator. . Examples of the polymerization initiation assistant (C1) include thioxanthone compounds, thiazoline compounds, alkoxyanthracene compounds, amine compounds, and carboxylic acid compounds. By combining these with the polymerization initiator (C), a pattern can be obtained with high sensitivity.

  Examples of the thioxanthone compound include 2-isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, 1-chloro-4-propoxythioxanthone and the like.

  Examples of the thiazoline compound include compounds represented by formulas (III-1) to (III-3), and compounds described in JP-A-2008-65319.

  Examples of the alkoxyanthracene compound include 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, 2-ethyl-9,10-diethoxyanthracene, and 9,10-dibutoxy. Anthracene, 2-ethyl-9,10-dibutoxyanthracene, compounds described in JP-A-2009-139932, and the like can be mentioned.

  Examples of amine compounds include aliphatic amine compounds such as triethanolamine, methyldiethanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 4-dimethylamino. Of 2-ethylhexyl benzoate, 2-dimethylaminoethyl benzoate, N, N-dimethylparatoluidine, 4,4′-bis (dimethylamino) benzophenone (common name; Michler's ketone), 4,4′-bis (diethylamino) benzophenone Such aromatic amine compounds are mentioned.

  Carboxylic acid compounds include phenylsulfanylacetic acid, methylphenylsulfanylacetic acid, ethylphenylsulfanylacetic acid, methylethylphenylsulfanylacetic acid, dimethylphenylsulfanylacetic acid, methoxyphenylsulfanylacetic acid, dimethoxyphenylsulfanylacetic acid, chlorophenylsulfanylacetic acid, dichlorophenylsulfanylacetic acid, N -Aromatic heteroacetic acids such as phenylglycine, phenoxyacetic acid, naphthylthioacetic acid, N-naphthylglycine and naphthoxyacetic acid.

  The content of the polymerization initiator (C) is preferably 0.5 to 30 parts by mass, more preferably 1 to 20 with respect to 100 parts by mass in total of the polymer (A) and the (meth) acrylic compound (B). Part by mass, more preferably 2 to 10 parts by mass. It is preferable that the content of the polymerization initiator (C) is in the above range because a pattern can be obtained with high sensitivity.

  The amount of the polymerization initiation assistant (C1) used is preferably 0.1 to 10 parts by mass, more preferably 0.3 to 100 parts by mass in total of the resin (A) and the (meth) acrylic compound (B). -7 parts by mass. When the amount of the polymerization initiation assistant (C1) is in the above range, a pattern can be obtained with high sensitivity, and the resulting pattern is preferable because the shape is good.

  The curable resin composition of the present invention comprises an imidazole compound represented by the following formula (1) (hereinafter sometimes referred to as “imidazole compound (D)”).

〔式（１）中、Ｒ^１は、ベンジル基又は炭素数２〜５のシアノアルキル基を表す。
Ｒ^２〜Ｒ^４は、互いに独立に、水素原子、ハロゲン原子、炭素数１〜２０のアルキル基、フェニル基、ニトロ基又は炭素数１〜２０のアシル基を表し、該アルキル基及び該フェニル基に含まれる水素原子は、ヒドロキシ基で置換されていてもよい。〕

[Equation (1), ^{R 1} represents a benzyl group or a cyanoalkyl group having 2 to 5 carbon atoms.
R ^{2 to} R ⁴ each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a phenyl group, a nitro group, or an acyl group having 1 to 20 carbon atoms, and the alkyl group and the phenyl group The hydrogen atom contained in may be substituted with a hydroxy group. ]

Examples of the alkyl group having 1 to 20 carbon atoms include methyl group, ethyl group, propyl group, isobutyl group, butyl group, tert-butyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group and heptadecyl group. And an undecyl group etc. are mentioned, Preferably it is C1-C15, More preferably, it is C1-C12.
Examples of the cyanoalkyl group having 2 to 5 carbon atoms include a cyanomethyl group, a cyanoethyl group, a cyanopropyl group, a cyanobutyl group, and a cyanopentyl group.

Examples of the halogen atom include a fluorine atom, a chlorine atom, and a bromine atom.
Examples of the acyl group having 1 to 20 carbon atoms include formyl group, acetyl group, propionyl group, isobutyryl group, valeryl group, isovaleryl group, pivaloyl group, lauroyl group, myristolyl group and stearoyl group.

R ² is preferably, independently of each other, a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or a phenyl group, and the hydrogen atom contained in the alkyl group and the phenyl group may be substituted with a hydroxy group. More preferably, they are a hydrogen atom, a C1-C20 alkyl group, or a phenyl group, More preferably, they are a C1-C20 alkyl group or a phenyl group.

R ³ and R ⁴ are preferably, independently of each other, a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or a phenyl group, and the hydrogen atom contained in the alkyl group and the phenyl group is substituted with a hydroxy group. More preferably a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or a phenyl group, still more preferably a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and particularly preferably a hydrogen atom. Or it is a C1-C6 alkyl group.

  Examples of the imidazole compound (D) include 1-benzyl-4-methylimidazole, 1-benzyl-4-methylimidazole, 1-benzyl-4-phenylimidazole, 1-benzyl-5-hydroxymethylimidazole, 1-cyanomethyl. 2-methylimidazole, 1- (2-cyanoethyl) -2-hydroxymethylimidazole, 1-cyanomethyl-2-undecylimidazole, 1-cyanomethyl-2-ethyl-4-methylimidazole, 1-cyanomethyl-2-phenyl Examples include imidazole and 1- (2-cyanoethyl) -2-ethyl-4-methylimidazole. Of these, 1-benzyl-4-phenylimidazole and 1- (2-cyanoethyl) -2-ethyl-4-methylimidazole are preferable. These can be used alone or in combination of two or more.

  The content of the imidazole compound (D) is preferably 1 part by mass or more and 25 parts by mass or less, more preferably 1.5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the polymer (A). When the content of the imidazole compound (D) is in the above range, the resulting pattern or coating film tends to be excellent in transparency.

  The curable resin composition of the present invention preferably further contains a thiol compound (T). The thiol compound (T) is a compound having a sulfanyl group (—SH) in the molecule. Among them, a compound having two or more sulfanyl groups is preferable, and a compound having two or more sulfanyl groups bonded to a carbon atom of an aliphatic hydrocarbon structure is more preferable. By including the thiol compound (T) in the curable resin composition of the present invention, the sensitivity tends to increase.

  Examples of the thiol compound (T) include hexanedithiol, decanedithiol, 1,4-bis (methylsulfanyl) benzene, butanediol bis (3-sulfanylpropionate), butanediol bis (3-sulfanyl acetate), ethylene Glycol bis (3-sulfanyl acetate), trimethylolpropane tris (3-sulfanyl acetate), butanediol bis (3-sulfanylpropionate), trimethylolpropane tris (3-sulfanylpropionate), trimethylolpropane tris ( 3-sulfanyl acetate), pentaerythritol tetrakis (3-sulfanylpropionate), pentaerythritol tetrakis (3-sulfanyl acetate), trishydroxyethyl Squirrel (3-sulfanyl propionate), pentaerythritol tetrakis (3-sulfanyl butyrate), 1,4-bis (3-sulfanyl-butyloxy) include butane and the like.

  The content of the thiol compound (T) is preferably 10 to 90 parts by mass, more preferably 15 to 70 parts by mass with respect to 100 parts by mass of the polymerization initiator (C). When the content of the thiol compound (T) is within this range, the sensitivity tends to be high and the developability tends to be good.

The curable resin composition of the present invention preferably contains a solvent (E).
A solvent (E) is not specifically limited, The solvent normally used in the said field | area can be used. For example, an ester solvent (a solvent containing —COO— in the molecule and not containing —O—), an ether solvent (a solvent containing —O— in the molecule and not containing —COO—), an ether ester solvent (intramolecular) Solvent containing -COO- and -O-), ketone solvent (solvent containing -CO- in the molecule and not containing -COO-), alcohol solvent (containing OH in the molecule, -O-,- Solvents not containing CO- and -COO-), aromatic hydrocarbon solvents, amide solvents, dimethyl sulfoxide and the like can be used.

  As ester solvents, methyl lactate, ethyl lactate, butyl lactate, methyl 2-hydroxyisobutanoate, ethyl acetate, n-butyl acetate, isobutyl acetate, pentyl formate, isopentyl acetate, butyl propionate, isopropyl butyrate, ethyl butyrate, butyl butyrate Methyl pyruvate, ethyl pyruvate, propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, cyclohexanol acetate, γ-butyrolactone and the like.

  Ether solvents include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether , Propylene glycol monopropyl ether, propylene glycol monobutyl ether, 3-methoxy-1-butanol, 3-methoxy-3-methylbutanol, tetrahydrofuran, tetrahydropyran, 1,4-dioxane, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethyl Glycol methyl ethyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl ether, anisole, phenetole, and the like methyl anisole.

  Examples of ether ester solvents include methyl methoxyacetate, ethyl methoxyacetate, butyl methoxyacetate, methyl ethoxyacetate, ethyl ethoxyacetate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, 3-ethoxy Ethyl propionate, methyl 2-methoxypropionate, ethyl 2-methoxypropionate, propyl 2-methoxypropionate, methyl 2-ethoxypropionate, ethyl 2-ethoxypropionate, methyl 2-methoxy-2-methylpropionate, Ethyl 2-ethoxy-2-methylpropionate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether Acetate, propylene glycol monopropyl ether acetate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether acetate, and the like diethylene glycol monobutyl ether acetate.

  Examples of ketone solvents include 4-hydroxy-4-methyl-2-pentanone, acetone, 2-butanone, 2-heptanone, 3-heptanone, 4-heptanone, 4-methyl-2-pentanone, cyclopentanone, cyclohexanone, and isophorone. Etc.

  Examples of the alcohol solvent include methanol, ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, propylene glycol, and glycerin.

  Examples of the aromatic hydrocarbon solvent include benzene, toluene, xylene, mesitylene and the like.

Examples of the amide solvent include N, N-dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone and the like.
These solvents may be used alone or in combination of two or more.

  Among the above-mentioned solvents, an organic solvent having a boiling point at 1 atm of 120 ° C. or higher and 180 ° C. or lower is preferable from the viewpoints of coating properties and drying properties. Among these, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, diethylene glycol methyl ethyl ether, 3-methoxybutyl acetate, 3-methoxy-1-butanol and a mixed solvent containing these are preferable.

  Content of the solvent (E) in curable resin composition becomes like this. Preferably it is 60-95 mass% with respect to curable resin composition, More preferably, it is 70-95 mass%. In other words, the solid content of the curable resin composition is preferably 5 to 40% by mass, and more preferably 5 to 30% by mass. Here, solid content means the quantity remove | excluding the solvent (E) from curable resin composition. If the content of the solvent (E) is in the above range, the flatness of the film coated with the curable resin composition tends to be high.

  The curable resin composition of the present invention preferably contains an antioxidant (F). Examples of the antioxidant (F) include 2-tert-butyl-6- (3-tert-butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate, 2- [1- (2- Hydroxy-3,5-di-tert-pentylphenyl) ethyl] -4,6-di-tert-pentylphenyl acrylate, 6- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propoxy ] -2,4,8,10-tetra-tert-butyldibenz [d, f] [1,3,2] dioxaphosphine, 3,9-bis [2- {3- (3-tert-butyl) -4-hydroxy-5-methylphenyl) propionyloxy} -1,1-dimethylethyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, 2,2′-me Renbis (6-tert-butyl-4-methylphenol), 4,4′-butylidenebis (6-tert-butyl-3-methylphenol), 4,4′-thiobis (2-tert-butyl-5-methylphenol) ), 2,2′-thiobis (6-tert-butyl-4-methylphenol), dilauryl 3,3′-thiodipropionate, dimyristyl 3,3′-thiodipropionate, distearyl 3,3′- Thiodipropionate, pentaerythrityltetrakis (3-laurylthiopropionate), 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) -1,3,5-triazine -2,4,6 (1H, 3H, 5H) -trione, 3,3 ', 3 ", 5,5', 5" -hexa-tert-butyl-a, a ', "-(Mesitylene-2,4,6-triyl) tri-p-cresol, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 2,6-di- Examples thereof include tert-butyl-4-methylphenol, etc. Commercial products such as IRGANOX (registered trademark) 3114 (manufactured by BASF Japan) may be used.

  Content of antioxidant (F) is 0.1 mass part or more and 5 mass parts or less with respect to 100 mass parts of polymers (A), and 0.5 mass part or more and 3 mass parts or less are preferable. When the content of the antioxidant (F) is within the above range, the resulting coating film tends to be excellent in heat resistance and pencil hardness. When content of antioxidant (F) exceeds 5 mass parts, there exists a possibility that pencil hardness may fall.

  The curable resin composition of the present invention may contain a surfactant (G). Examples of the surfactant include a silicone surfactant, a fluorine surfactant, a silicone surfactant having a fluorine atom, and the like.

Examples of the silicone surfactant include surfactants having a siloxane bond.
Specifically, Torre Silicone DC3PA, SH7PA, DC11PA, SH21PA, SH28PA, SH29PA, SH29PA, SH30PA, polyether-modified silicone oil SH8400 (trade name: manufactured by Toray Dow Corning Co., Ltd.), KP321, KP322 , KP323, KP324, KP326, KP340, KP341 (manufactured by Shin-Etsu Chemical Co., Ltd.), TSF400, TSF401, TSF410, TSF4300, TSF4440, TSF4445, TSF-4446, TSF4452, TSF4460 (Momentive Performance Materials Japan GK) Manufactured) and the like.

Examples of the fluorosurfactant include surfactants having a fluorocarbon chain.
Specifically, Florinart (registered trademark) FC430, FC431 (manufactured by Sumitomo 3M Co., Ltd.), MegaFac (registered trademark) F142D, F171, F172, F173, F177, F183, F183, F552, F553, F554, F555, F556, F556, F558, F559, R559 (manufactured by DIC Corporation), Ftop (registered trademark) EF301, EF303, EF351, EF352 (Mitsubishi Materials Electronics Chemicals, Inc.) ), Surflon (registered trademark) S381, S382, SC101, SC105 (Asahi Glass Co., Ltd.), E5844 (Daikin Fine Chemical Laboratory Co., Ltd.), and the like.

  Examples of the silicone-based surfactant having a fluorine atom include surfactants having a siloxane bond and a fluorocarbon chain. Specifically, Megafac (registered trademark) R08, BL20, F475, F477, F443 (manufactured by DIC Corporation) and the like can be mentioned. Preferably, MegaFac (registered trademark) F475 is used.

  Surfactant (G) is 0.001 mass% or more and 0.2 mass% or less with respect to curable resin composition, Preferably it is 0.002 mass% or more and 0.1 mass% or less, More preferably It is 0.01 mass% or more and 0.05 mass% or less. By containing the surfactant in this range, the flatness of the coating film can be improved.

  The curable resin composition of the present invention contains additives such as a filler, other polymer compound, a thermal radical generator, an ultraviolet absorber, a chain transfer agent, and an adhesion promoter as necessary. Also good.

Examples of the filler include glass, silica, and alumina.
Examples of other polymer compounds include thermosetting resins such as maleimide resins, and thermoplastic resins such as polyvinyl alcohol, polyacrylic acid, polyethylene glycol monoalkyl ether, polyfluoroalkyl acrylate, polyester, and polyurethane.

Specific examples of the thermal radical generator include 2,2′-azobis (2-methylvaleronitrile), 2,2′-azobis (2,4-dimethylvaleronitrile), and the like.
Specific examples of the ultraviolet absorber include 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -5-chlorobenzotriazole and alkoxybenzophenone.
Examples of the chain transfer agent include dodecyl mercaptan and 2,4-diphenyl-4-methyl-1-pentene.
Examples of the adhesion promoter include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, 3-glycidyloxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, and 3-glycid. Xylpropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3- Methacryloyloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-sulfanylpropyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, N-2- (aminoethyl) 3-aminopropylmethyldimethoxysilane, N-2- (aminoethyl) -3-aminopropylmethyldiethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, N-2- (aminoethyl) ) -3-Aminopropylmethyldiethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltriethoxysilane Etc.

  Moreover, the curable resin composition of this invention does not contain colorants, such as a pigment and dye, substantially. That is, in the curable resin composition of the present invention, the content of the colorant with respect to the entire composition is, for example, less than 1% by mass, preferably less than 0.5% by mass.

  Moreover, the curable resin composition of the present invention is filled in a quartz cell having an optical path length of 1 cm, and the transmittance is measured when the transmittance is measured using a spectrophotometer at a measurement wavelength of 400 to 700 nm. Is preferably 70% or more, and more preferably 80% or more.

  When the curable resin composition of the present invention is used as a coating film, the average transmittance of the coating film is preferably 90% or more, more preferably 95% or more. This average transmittance is measured under the conditions of a measurement wavelength of 400 to 700 nm using a spectrophotometer for a coating film having a thickness of 3 μm after heat curing (for example, 100 to 250 ° C., 5 minutes to 3 hours). It is an average value when measured by. Thereby, the coating film excellent in transparency in the visible light region can be provided.

  The curable resin composition of the present invention comprises a polymer (A), a (meth) acrylic compound (B), a polymerization initiator (C) and an imidazole compound (D), and a solvent and other additives as necessary. It can be produced by stirring and mixing by a conventionally known method. After mixing, it is preferable to filter with a filter having a pore size of about 0.05 to 1.0 μm.

  The curable resin composition of the present invention is formed as a coating film by, for example, coating on a substrate made of glass, metal, plastic, etc., a color filter, various insulating or conductive films, a drive circuit, etc. can do. The coating film is preferably dried and cured. Moreover, the obtained coating film can be patterned into a desired shape and used as a pattern. Furthermore, these coating films or patterns may be formed and used as part of a component such as a display device.

First, the curable resin composition of the present invention is applied on a substrate.
As described above, the coating can be performed using various coating apparatuses such as a spin coater, a slit & spin coater, a slit coater, an ink jet, a roll coater, and a dip coater.

Then, it is preferable to dry or pre-bake to remove volatile components such as a solvent. Thereby, a smooth uncured coating film can be obtained.
The film thickness of the coating film in this case is not particularly limited, and can be appropriately adjusted depending on the material used, application, etc. For example, about 1 to 6 μm is exemplified.

Furthermore, the obtained uncured coating film is irradiated with light, for example, ultraviolet rays generated from a mercury lamp or a light emitting diode, through a mask for forming a target pattern. The shape of the mask at this time is not particularly limited, and various shapes can be mentioned. Further, the transmittance of the mask light transmitting portion is not particularly limited as long as it transmits light from the light source. The width and height of the pattern can be appropriately adjusted depending on the mask size, the transmittance of the mask light transmitting portion, and the like.
In recent exposure machines, light of less than 350 nm is cut using a filter that cuts this wavelength range, or light near 436 nm, 408 nm, and 365 nm is used using a bandpass filter that extracts these wavelength ranges. It is possible to selectively take out and irradiate parallel light uniformly on the entire exposure surface. At this time, an apparatus such as a mask aligner or a stepper may be used to accurately align the mask and the substrate.

Thereafter, a desired pattern shape can be obtained by bringing the coating film into contact with an aqueous alkali solution to dissolve a predetermined portion, for example, an unexposed portion, and developing.
The developing method may be any of a liquid piling method, a dipping method, a spray method, and the like. Further, the substrate may be tilted at an arbitrary angle during development.

The developer used for development is preferably an aqueous solution of an alkaline compound.
The alkaline compound may be either an inorganic or organic alkaline compound.
Specific examples of the inorganic alkaline compound include sodium hydroxide, potassium hydroxide, disodium hydrogen phosphate, sodium dihydrogen phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, potassium dihydrogen phosphate, sodium silicate, potassium silicate, Examples thereof include sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium borate, potassium borate, and ammonia.

Examples of the organic alkaline compound include tetramethylammonium hydroxide, 2-hydroxyethyltrimethylammonium hydroxide, monomethylamine, dimethylamine, trimethylamine, monoethylamine, diethylamine, triethylamine, monoisopropylamine, diisopropylamine, and ethanolamine. Is mentioned.
The density | concentration in the aqueous solution of these inorganic and organic alkaline compounds becomes like this. Preferably it is 0.01-10 mass%, More preferably, it is 0.03-5 mass%.

The aqueous solution of the alkaline compound may contain a surfactant.
The surfactant may be any of a nonionic surfactant, an anionic surfactant, or a cationic surfactant.
Nonionic surfactants include, for example, polyoxyethylene alkyl ether, polyoxyethylene aryl ether, polyoxyethylene alkyl aryl ether, other polyoxyethylene derivatives, oxyethylene / oxypropylene block copolymers, sorbitan fatty acid esters, polyoxyethylene Examples thereof include oxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, glycerin fatty acid ester, polyoxyethylene fatty acid ester, and polyoxyethylene alkylamine.

  Examples of the anionic surfactant include higher alcohol sulfates such as sodium lauryl alcohol sulfate and sodium oleyl alcohol sulfate, alkyl sulfates such as sodium lauryl sulfate and ammonium lauryl sulfate, sodium dodecylbenzenesulfonate, and dodecyl sodium sulfate. And alkylaryl sulfonates such as sodium naphthalene sulfonate.

Examples of the cationic surfactant include amine salts or quaternary ammonium salts such as stearylamine hydrochloride and lauryltrimethylammonium chloride.
The concentration of the surfactant in the alkali developer is preferably in the range of 0.01 to 10% by mass, more preferably 0.05 to 8% by mass, and more preferably 0.1 to 5% by mass.

  After development, washing may be performed, and post-baking may be performed as necessary. The post-baking is preferably, for example, a temperature range of 150 to 240 ° C. and 10 to 180 minutes.

  The coating film or pattern thus obtained is useful as, for example, a photospacer used in a liquid crystal display device or a patternable overcoat. Moreover, a hole can be formed by using the photomask for hole formation at the time of patterning exposure to an uncured coating film, and it is useful as an interlayer insulation film. Furthermore, a transparent film can be formed by performing only the whole surface exposure and heat curing or heat curing without using a photomask when exposing the uncured coating film. This transparent film is useful as an overcoat. Further, it can be used for a display device such as a touch panel. Thereby, it is possible to manufacture a display device having a high-quality coating film or pattern with a high yield.

  The curable resin composition of the present invention is a material for forming various films and patterns, for example, a transparent film, pattern, photospacer, overcoat, insulating film constituting a part of a color filter and / or an array substrate. It is suitable for forming liquid crystal alignment control protrusions, microlenses, coat layers and the like. Further, a color filter, an array substrate, or the like provided with these coating films or patterns as a part of its constituent parts, and a display device including these color filters and / or an array substrate, for example, a liquid crystal display device, an organic EL device It can be used for electronic paper.

  Hereinafter, the present invention will be described in more detail with reference to examples. Unless otherwise specified, “%” and “part” in the examples are mass% and part by mass.

(Synthesis Example 1)
Nitrogen was allowed to flow at 0.02 L / min in a flask equipped with a reflux condenser, a dropping funnel and a stirrer to form a nitrogen atmosphere, and 140 parts of diethylene glycol ethyl methyl ether was added and heated to 70 ° C. with stirring. Then 40 parts of methacrylic acid; and a mixture of monomer (I-1) and monomer (II-1) {monomer (I-1) in the mixture: molar ratio of monomer (II-1)] = 50: 50} A solution having 360 parts dissolved in 190 parts of diethylene glycol ethyl methyl ether was prepared, and this solution was dropped into a flask kept at 70 ° C. for 4 hours using a dropping funnel.

  On the other hand, a solution prepared by dissolving 30 parts of a polymerization initiator 2,2′-azobis (2,4-dimethylvaleronitrile) in 240 parts of diethylene glycol ethyl methyl ether was placed in a flask over another 5 hours using another dropping pump. It was dripped. After completion of the dropwise addition of the polymerization initiator solution, the solution was kept at 70 ° C. for 4 hours and then cooled to room temperature to obtain a copolymer (resin Aa) solution having a solid content of 42.3%. The obtained resin Aa had a weight average molecular weight (Mw) of 8000, a molecular weight distribution (Mw / Mn) of 1.91, and an acid value of 60 mg-KOH / g (acid value in terms of solid content).

(Synthesis Example 2)
In a flask equipped with a reflux condenser, a dropping funnel and a stirrer, nitrogen was allowed to flow at 0.02 L / min to form a nitrogen atmosphere, and 200 parts of 3-methoxy-1-butanol and 105 parts of 3-methoxybutyl acetate were added and stirred. While heating to 70 ° C. Next, 60 parts of methacrylic acid, 3,4-epoxytricyclo [5.2.12.02.6] decyl acrylate (the compound represented by the formula (I-1) and the formula (II-1) Mixture of compounds in a molar ratio of 50:50) 240 parts are dissolved in 140 parts of 3-methoxybutyl acetate to prepare a solution, and the solution is added to a 70 ° C. over 4 hours using a dropping funnel. It was dripped in the flask kept warm. On the other hand, a solution obtained by dissolving 30 parts of a polymerization initiator 2,2′-azobis (2,4-dimethylvaleronitrile) in 225 parts of 3-methoxybutyl acetate was placed in a flask using another dropping funnel over 4 hours. It was dripped. After completion of the dropwise addition of the polymerization initiator solution, the mixture was kept at 70 ° C. for 4 hours, and then cooled to room temperature. A solution of coalescence (resin Ab) was obtained. The obtained resin Ab had a weight average molecular weight Mw of 13,400 and a molecular weight distribution (Mw / Mn) of 2.50.

The weight average molecular weight (Mw) and the number average molecular weight (Mn) of the resin obtained above were measured using the GPC method under the following conditions.
Apparatus; K2479 (manufactured by Shimadzu Corporation)
Column; SHIMADZU Shim-pack GPC-80M
Column temperature: 40 ° C
Solvent; THF (tetrahydrofuran)
Flow rate: 1.0 mL / min
Detector; RI
Standard material for calibration: TSK STANDARD POLYSTYRENE F-40, F-4, F-288, A-2500, A-500 (manufactured by Tosoh Corporation)
The polystyrene-converted weight average molecular weight and number average molecular weight ratio (Mw / Mn) obtained above was defined as molecular weight distribution.

(Examples 1-8 and Comparative Example 1)
The components in Table 1 were mixed to obtain a curable resin composition.

イミダゾール化合物（Ｄ）；Ｄｂ；１−（２−シアノエチル）−２−ウンデシルイミダゾール（キュアゾールＣ１１Ｚ−ＣＮ；四国化成工業（株）製）

イミダゾール化合物（Ｄ）；Ｄｃ；１−（２−シアノエチル）−２−エチル−４−メチルイミダゾール（キュアゾール２Ｅ４ＭＺ−ＣＮ；四国化成工業（株）製）

チオール化合物（Ｔ）；Ｔａ；ペンタエリスリトールテトラキスプロピオネート（ＰＥＭＰ；ＳＣ有機化学（株）製）
酸化防止剤（Ｆ）；Ｆａ；１，３，５−トリス（４−ヒドロキシ−３，５−ジ−ｔｅｒｔ−ブチルベンジル）−１，３，５−トリアジン−２，４，６（１Ｈ，３Ｈ，５Ｈ）−トリオン（ＩＲＧＡＮＯＸ（登録商標）３１１４；ＢＡＳＦジャパン（株）製）
溶剤（Ｅ）；Ｅａ；プロピレングリコールモノメチルエーテルアセテート
溶剤（Ｅ）；Ｅｂ；３−メトキシ−１−ブタノール
溶剤（Ｅ）；Ｅｃ；ジエチレングリコールエチルメチルエーテル
溶剤（Ｅ）；Ｅｄ；３−エトキシエチルプロピオネート
溶剤（Ｅ）；Ｅｅ；３−メトキシブチルアセテート
溶剤（Ｅ）は、硬化性樹脂組成物の固形分量が表１の「固形分量（％）」となるように混合し、溶剤（Ｅ）中の溶剤成分（Ｅａ）〜（Ｅｅ）の値は、溶剤（Ｅ）中の質量比を表す。 In Table 1, unless otherwise specified, the unit is “part”. The content part of a polymer (A) represents the mass part of solid content conversion.
Polymer (A); Aa; Resin Aa obtained in Synthesis Example
Polymer (A); Ab; Resin Ab obtained in Synthesis Example
(Meth) acrylic compound (B); Ba; dipentaerythritol hexaacrylate (KAYARAD (registered trademark) DPHA; manufactured by Nippon Kayaku Co., Ltd.)
Polymerization initiator (C); Ca; N-benzoyloxy-1- (4-phenylsulfanylphenyl) octane-1-one-2-imine (Irgacure (registered trademark) OXE 01; manufactured by BASF; oxime compound)
Polymerization initiator (C); Cb; 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole (B-CIM; Hodogaya Chemical ( Manufactured by)
Polymerization initiation aid (C1); C1a; 2- (2-naphthoylmethylene) -3-methylbenzothiazoline imidazole compound (D); Da; 1-benzyl-2-phenylimidazole (Cureazole 1B2PZ; Shikoku Kasei Kogyo Co., Ltd. ) Made)

Imidazole compound (D); Db; 1- (2-cyanoethyl) -2-undecylimidazole (Cureazole C11Z-CN; manufactured by Shikoku Chemicals Co., Ltd.)

Imidazole compound (D); Dc; 1- (2-cyanoethyl) -2-ethyl-4-methylimidazole (Curazole 2E4MZ-CN; manufactured by Shikoku Chemicals Co., Ltd.)

Thiol compound (T); Ta; pentaerythritol tetrakispropionate (PEMP; manufactured by SC Organic Chemical Co., Ltd.)
Antioxidant (F); Fa; 1,3,5-tris (4-hydroxy-3,5-di-tert-butylbenzyl) -1,3,5-triazine-2,4,6 (1H, 3H , 5H) -trione (IRGANOX (registered trademark) 3114; manufactured by BASF Japan Ltd.)
Solvent (E); Ea; Propylene glycol monomethyl ether acetate Solvent (E); Eb; 3-Methoxy-1-butanol Solvent (E); Ec; Diethylene glycol ethyl methyl ether Solvent (E); Ed; 3-Ethoxyethyl propio Nate solvent (E); Ee; 3-methoxybutyl acetate The solvent (E) is mixed so that the solid content of the curable resin composition becomes the “solid content (%)” in Table 1, and the solvent (E) The values of the solvent components (Ea) to (Ee) represent mass ratios in the solvent (E).

<Viscosity measurement>
About the obtained curable resin composition, the viscosity was measured using the viscometer (model; TV-30; Toki Sangyo Co., Ltd. product), respectively. The results are shown in Table 2.

<Transmissivity of curable resin composition>
Each of the obtained curable resin compositions was averaged at 400 to 700 nm using an ultraviolet-visible near-infrared spectrophotometer (V-650; manufactured by JASCO Corporation) (quartz cell, optical path length: 1 cm). The transmittance (%) was measured. The results are shown in Table 2.

<Preparation of coating film>
A 2-inch square glass substrate (Eagle XG; manufactured by Corning) was sequentially washed with a neutral detergent, water and 2-propanol and then dried. On this glass substrate, the curable resin composition is spin-coated so that the film thickness after post-baking becomes 3.0 μm, then pre-baked in a hot plate at 90 ° C. for 2 minutes, and then exposed to an exposure machine ( Using TME-150RSK; Topcon Corporation light source; ultrahigh pressure mercury lamp), the pre-baked coating film was exposed at an exposure amount of 100 mJ / cm ² (based on 365 nm) in an air atmosphere. In this exposure, the emitted light from the ultra-high pressure mercury lamp was irradiated through an optical filter (UV-33; manufactured by Asahi Techno Glass Co., Ltd.). After the exposure, the coating film was obtained by heating at 230 ° C. for 20 minutes.

<Transparency of coating film>
About the obtained coating film, the average transmittance | permeability (%) in 400-700 nm was measured using the microspectrophotometer (OSP-SP200; OLYMPUS company make). The results are shown in Table 2.

<Heat resistance>
The obtained coating film was heated in an oven at 240 ° C. for 60 minutes, the film thickness and transmittance before and after heating were measured, and the film thickness change (%) and transmittance change (%) were obtained according to the following formulas. It was. The film thickness was measured using a film thickness measuring device (DEKTAK3; manufactured by Nippon Vacuum Technology Co., Ltd.). In either case, the closer to 100%, the smaller the change before and after heating, which means superior heat resistance. Moreover, if the heat resistance of a coating film is high, the heat resistance of the pattern formed with the same curable resin composition is also high. The results are shown in Table 2.
Change in transmittance (%); (transmittance after heating (%) / transmittance before heating (%)) × 100
Change in film thickness (%); (film thickness after heating (μm) / film thickness before heating (μm)) × 100

<Pattern formation>
A 2-inch square glass substrate (Eagle 2000; manufactured by Corning) was sequentially washed with a neutral detergent, water and 2-propanol and then dried. On this glass substrate, the curable resin composition was applied by spin coating so that the film thickness of the post-baked pattern was 3 μm. Next, the degree of vacuum was reduced to 0.5 torr with a vacuum dryer (VCD Microtech Co., Ltd.) and dried to form a coating film. This coating film was prebaked for 2 minutes at 90 ° C. in a hot plate. The distance between the substrate and the quartz glass photomask was set to 10 μm, and the exposure amount (365 nm) was 100 mJ / cm ^{2 in} an air atmosphere using an exposure machine (TME-150RSK; manufactured by Topcon Corporation, light source: ultrahigh pressure mercury lamp). Standard), the pre-baked coating film was exposed. In this exposure, the emitted light from the ultra-high pressure mercury lamp was irradiated through an optical filter (UV-33; manufactured by Asahi Techno Glass Co., Ltd.). The photomask has circular translucent portions having diameters of 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, and 20 μm. A photomask in which a pattern with a distance of 100 μm between the light transmitting portions was formed on the same plane was used.
After exposure, the film was immersed in an aqueous developer containing 0.12% nonionic surfactant and 0.04% potassium hydroxide at 25 ° C. for 60 seconds for development, washed with water, and then washed in an oven at 230 ° C. for 20 hours. Post-baking was performed for a minute to form a pattern.

<Resolution evaluation>
The pattern obtained with a scanning electron microscope (S-4000; manufactured by Hitachi, Ltd.) was observed, and the minimum line width at which the pattern was separated was defined as the resolution. The results are shown in Table 2.

  From the above results, it was confirmed that the coating film obtained from the curable resin composition of the present invention had a small transmittance change in the heat resistance test and little coloration due to the heat treatment.

  According to the curable resin composition of this invention, it is possible to form the coating film and pattern which are excellent in heat resistance.

Claims (4)

Curable resin composition containing the following (A), (B), (C) and (D):
(A) An addition polymer (B) containing a structural unit derived from at least one selected from the group consisting of an unsaturated carboxylic acid and an unsaturated carboxylic acid anhydride, and a structural unit derived from an unsaturated compound having an oxiranyl group ) A compound having at least one group selected from the group consisting of an acryloyl group and a methacryloyl group (C) a polymerization initiator (D) a compound represented by formula (1)

[In formula (1), ^{R 1} represents a benzyl group or a cyanoalkyl group having 2 to 5 carbon atoms,
R ^{2 to} R ⁴ each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a phenyl group, a nitro group, or an acyl group having 1 to 20 carbon atoms, and the alkyl group and the phenyl group The hydrogen atom contained in may be substituted with a hydroxy group.   The curable resin composition according to claim 1, wherein the content of (D) is 1 part by mass or more and 25 parts by mass or less with respect to 100 parts by mass of (A).   The coating film formed with the curable resin composition of Claim 1 or 2.   A display device comprising the coating film according to claim 3.