JP2020097702A - Curable resin composition, cured product, insulating material, resin material for solder resist, and resist member - Google Patents

Abstract

To provide a curable resin composition giving a cured product excellent in heat resistance, elongation, and adhesion to a substrate, and an insulating material, a resin material for a solder resist, and a resist member comprising the curable resin composition.SOLUTION: The curable resin composition is used which contains: an acid group-containing (meth)acrylate resin composition (i) containing an acid group-containing (meth)acrylate resin (E) which uses an amide-imide resin (A) having an acid group and/or an acid anhydride group, a hydroxyl group-containing (meth)acrylate compound (B), an epoxy group-containing (meth)acrylate compound (C), and a polycarboxylic acid anhydride (D) as essential reaction raw materials; and a curing agent (ii) containing an epoxy resin. The number of moles of epoxy groups of the curing agent (ii) per mole of acid groups of the acid group-containing (meth)acrylate resin composition (i) is in the range of 0.7-1.7.SELECTED DRAWING: None

Description

The present invention relates to a curable resin composition having excellent heat resistance, elongation and substrate adhesion in a cured product, an insulating material comprising the curable resin composition, a solder resist resin material, and a resist member.

In recent years, an acid group-containing epoxy acrylate resin obtained by acrylate conversion of an epoxy resin with acrylic acid and then reaction with an acid anhydride is widely used as a resin material for a solder resist for a printed wiring board. There are various requirements for the resin material for a solder resist, such as excellent heat resistance, elongation and substrate adhesion in the cured product.

As a conventionally known resin material for a solder resist, an active energy ray-curable resin obtained by reacting a reaction product of a novolac type epoxy resin and an unsaturated monocarboxylic acid with a saturated or unsaturated polybasic acid anhydride Although a resin is known (for example, refer to Patent Document 1 below), although it has excellent heat resistance in a cured product, it does not satisfy the ever-increasing required properties in terms of elongation and substrate adhesion. It was not enough for the recent market demand.

Therefore, there has been a demand for a material having excellent heat resistance, elongation and substrate adhesion in the cured product.

JP-A-61-243869

The problem to be solved by the present invention is a heat-resistant cured product, a curable resin composition having excellent elongation and substrate adhesion, an insulating material comprising the curable resin composition, a solder resist resin material and a resist. It is to provide a member.

As a result of intensive studies to solve the above problems, the present inventors have found that an amide-imide resin having an acid group and/or an acid anhydride group, a hydroxyl group-containing (meth)acrylate compound, an epoxy group-containing (meth)acrylate compound, and By using an acid group-containing (meth)acrylate resin composition containing an acid group-containing (meth)acrylate resin containing a polycarboxylic acid anhydride as an essential reaction raw material and a curing agent containing an epoxy resin in specific proportions The inventors have found that the above problems can be solved and completed the present invention.

That is, the present invention provides an amide imide resin (A) having an acid group and/or an acid anhydride group, a hydroxyl group-containing (meth)acrylate compound (B), an epoxy group-containing (meth)acrylate compound (C), and a polycarboxylic acid anhydride. Acid group-containing (meth)acrylate resin composition (i) containing an acid group-containing (meth)acrylate resin (E) using the substance (D) as an essential reaction raw material, and a curing agent (ii) containing an epoxy resin And a mole number of epoxy groups contained in the curing agent (ii) per 1 mole of the acid groups contained in the acid group-containing (meth)acrylate resin composition (i) is 0. The present invention relates to a curable resin composition, a cured product of the curable resin composition, an insulating material, a resin material for solder resist, and a resist member, which are in the range of 0.7 to 1.7.

Since the curable resin composition of the present invention is excellent in heat resistance, elongation and substrate adhesion in a cured product, it can be suitably used for an insulating material, a solder resist resin material and a resist member.

The curable resin composition of the present invention is characterized by containing an acid group-containing (meth)acrylate resin composition (i) and a curing agent (ii).

In addition, in this invention, "(meth)acrylate" means an acrylate and/or a methacrylate. Moreover, "(meth)acryloyl" means acryloyl and/or methacryloyl. Furthermore, "(meth)acrylic" means acrylic and/or methacrylic.

Examples of the acid group-containing (meth)acrylate resin composition (i) include an amide-imide resin (A) having an acid group and/or an acid anhydride group, a hydroxyl group-containing (meth)acrylate compound (B), and an epoxy group-containing (meth). ) An acid group-containing (meth)acrylate resin (E) containing an acrylate compound (C) and a polycarboxylic acid anhydride (D) as essential reaction raw materials.

The amide-imide resin (A) may have either an acid group or an acid anhydride group, or may have both. Among them, it is preferable to have an acid anhydride group from the viewpoint of reactivity and reaction control with the hydroxyl group-containing (meth)acrylate compound (B) and the epoxy group-containing (meth)acrylate compound (C). It is preferable to have both an acid group and an acid anhydride group.

Examples of the acid group include a carboxyl group, a sulfonic acid group, a phosphoric acid group, and the like.

Examples of the acid anhydride group include a carboxylic acid anhydride group, a sulfonic acid anhydride group, and a phosphoric acid anhydride group.

The specific structure of the amide-imide resin (A) is not particularly limited, and general amide-imide resins and the like can be widely used. For example, the polyisocyanate compound (a1) and the polycarboxylic acid anhydride (a2) may be used as essential reaction raw materials.

Examples of the polyisocyanate compound (a1) include aliphatic diisocyanate compounds such as butane diisocyanate, hexamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate and 2,4,4-trimethylhexamethylene diisocyanate; norbornane diisocyanate, Aliphatic diisocyanate compounds such as isophorone diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated diphenylmethane diisocyanate; tolylene diisocyanate, xylylene diisocyanate, tetramethyl xylylene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, 4,4'- Aromatic diisocyanate compounds such as diisocyanato-3,3'-dimethylbiphenyl and o-tolidine diisocyanate; polymethylene polyphenyl polyisocyanates having a repeating structure represented by the following structural formula (1); modified isocyanurates thereof, biuret Examples include modified products and allophanate modified products. In addition, these polyisocyanate compounds may be used alone or in combination of two or more kinds.

［式中、Ｒ^１はそれぞれ独立に水素原子、炭素原子数１〜６の炭化水素基の何れかである。Ｒ^２はそれぞれ独立に炭素原子数１〜４のアルキル基、または構造式（１）で表される構造部位と＊印が付されたメチレン基を介して連結する結合点の何れかである。ｌは０または１〜３の整数であり、ｍは１〜１５の整数である。］

[In the formula, each R ¹ is independently a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms. Each R ² is independently an alkyl group having 1 to 4 carbon atoms, or a bonding point connecting the structural site represented by the structural formula (1) and a methylene group marked with *. l is 0 or an integer of 1 to 3, and m is an integer of 1 to 15. ]

Among these, the alicyclic diisocyanate compound or a modified product thereof is preferable, and the alicyclic diisocyanate or an isocyanurate modified product thereof is preferable, in terms of a curable resin composition having excellent solvent solubility. Further, the above-mentioned aliphatic diisocyanate compound or a modified product thereof is preferable in terms of a curable resin composition having very excellent heat resistance, elongation and substrate adhesion in a cured product, and aliphatic diisocyanate or a modified isocyanurate thereof. Is preferred. Furthermore, the ratio of the total mass of the alicyclic diisocyanate compound or a modified product thereof and the aliphatic diisocyanate compound or a modified product thereof to the total mass of the polyisocyanate compound (a1) is preferably 70% by mass or more, It is more preferably 90 mass% or more. When the alicyclic diisocyanate compound or modified product thereof and the aliphatic diisocyanate compound or modified product thereof are used in combination, the mass ratio of the two is preferably in the range of 20/80 to 80/20.

Examples of the polycarboxylic acid anhydride (a2) include aliphatic polycarboxylic acid anhydrides, alicyclic polycarboxylic acid anhydrides, aromatic polycarboxylic acid anhydrides, and the like.

Examples of the aliphatic polycarboxylic acid anhydrides include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, citraconic acid, and itacone. Examples thereof include acids, glutaconic acid, and acid anhydrides of 1,2,3,4-butanetetracarboxylic acid. These aliphatic polycarboxylic acid anhydrides can be used alone or in combination of two or more kinds. In the aliphatic polycarboxylic acid anhydride, the aliphatic hydrocarbon group may be linear or branched and may have an unsaturated bond in the structure.

As the alicyclic polycarboxylic acid anhydride, in the present invention, the acid anhydride group is bonded to the alicyclic structure as an alicyclic polycarboxylic acid anhydride, the aromatic ring of the other structural site It does not matter whether it is present or not. Examples of the alicyclic polycarboxylic acid anhydride include tetrahydrophthalic acid, hexahydrophthalic acid, methylhexahydrophthalic acid, cyclohexanetricarboxylic acid, cyclohexanetetracarboxylic acid, bicyclo[2.2.1]heptane-2, 3-dicarboxylic acid, methylbicyclo[2.2.1]heptane-2,3-dicarboxylic acid, 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydronaphthalene- Examples thereof include acid anhydrides of 1,2-dicarboxylic acid. These alicyclic polycarboxylic acid anhydrides can be used alone or in combination of two or more kinds.

Examples of the aromatic polycarboxylic acid anhydrides include phthalic acid, trimellitic acid, pyromellitic acid, naphthalene dicarboxylic acid, naphthalene tricarboxylic acid, naphthalene tetracarboxylic acid, biphenyl dicarboxylic acid, biphenyl tricarboxylic acid, biphenyl tetracarboxylic acid, Examples thereof include acid anhydrides of benzophenone tetracarboxylic acid. These aromatic polycarboxylic acid anhydrides can be used alone or in combination of two or more kinds.

These polycarboxylic acid anhydrides (a2) can be used alone or in combination of two or more kinds. Further, among these, since a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion is obtained, the alicyclic polycarboxylic acid anhydride, or the aroma Group polycarboxylic acid anhydrides are preferred. Further, since a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion is obtained, tricarboxylic having both a carboxyl group and an acid anhydride group in the molecular structure. It is preferable to use an acid anhydride, and it is particularly preferable to use cyclohexanetricarboxylic acid anhydride or trimellitic acid anhydride. At this time, the content of the tricarboxylic acid anhydride in the polycarboxylic acid anhydride (a2) is preferably 70% by mass or more, and more preferably 90% by mass or more.

Further, as the amide-imide resin (A), other compounds may be used in combination with the polyisocyanate compound (a1) and the polycarboxylic acid anhydride (a2) as a reaction raw material, if necessary. When the other compound is used in combination, the effects of the present invention are sufficiently exhibited, and therefore, the polyisocyanate compound (a1) and the polycarboxylic acid anhydride (a2) in the reaction raw material of the amide imide resin (A) are sufficiently exhibited. The total content of () is preferably 80% by mass or more, and more preferably 85% by mass.

Examples of the other compound include polycarboxylic acid.

As the polycarboxylic acid, any compound can be used as long as it is a compound having two or more carboxyl groups in one molecule. For example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, hexahydro Phthalic acid, methylhexahydrophthalic acid, citraconic acid, itaconic acid, glutaconic acid, 1,2,3,4-butanetetracarboxylic acid, cyclohexanetricarboxylic acid, cyclohexanetetracarboxylic acid, bicyclo[2.2.1]heptane- 2,3-dicarboxylic acid, methylbicyclo[2.2.1]heptane-2,3-dicarboxylic acid, 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydro Naphthalene-1,2-dicarboxylic acid, trimellitic acid, pyromellitic acid, naphthalene dicarboxylic acid, naphthalene tricarboxylic acid, naphthalene tetracarboxylic acid, biphenyl dicarboxylic acid, biphenyl tricarboxylic acid, biphenyl tetracarboxylic acid, benzophenone tetracarboxylic acid, etc. To be Further, as the polycarboxylic acid, for example, a copolymer of a conjugated diene vinyl monomer and acrylonitrile, which has a carboxyl group in its molecule, can also be used. These polycarboxylic acids (a2) can be used alone or in combination of two or more kinds.

The copolymer of the conjugated diene vinyl monomer and acrylonitrile, which has a carboxyl group in its molecule, is, for example, a butadiene-acrylonitrile copolymer represented by the following structural formula (2-1). Half of a polymer having a carboxyl group in the polymer and a polymer having a hydroxyl group in the molecule of a butadiene-acrylonitrile copolymer represented by the following structural formula (2-2) and a polybasic acid anhydride such as maleic anhydride Examples thereof include esters. The position of the carboxyl group may be located on either the side chain or the terminal of the molecule, but the terminal is preferred.

［構造式（２−１）中、Ｘは１〜５０の整数であり、Ｙは１〜５０の整数であり、Ｚは１〜２０の整数である。］

[In the structural formula (2-1), X is an integer of 1 to 50, Y is an integer of 1 to 50, and Z is an integer of 1 to 20. ]

［構造式（２−２）中、Ｘは１〜５０の整数であり、Ｙは１〜５０の整数であり、Ｚは１〜２０の整数である。］

[In the structural formula (2-2), X is an integer of 1 to 50, Y is an integer of 1 to 50, and Z is an integer of 1 to 20. ]

Since the acid value of the amide-imide resin (A) is a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesiveness, it can be obtained under a neutral condition, that is, an acid value. The measurement value under the condition that the anhydride group is not opened is preferably in the range of 60 to 350 mgKOH/g, and the measurement value under the condition where the acid anhydride group is opened, such as in the presence of water, is 61 to 360 mgKOH. It is preferably in the range of /g. In the present invention, the acid value is a value measured by the neutralization titration method of JIS K 0070 (1992).

When the amide imide resin (A) is a reaction raw material of the polyisocyanate compound (a1) and the polycarboxylic acid anhydride (a2), the production method is not particularly limited, and may be produced by any method. May be. For example, it can be produced by a method similar to that of a general amide-imide resin. Specifically, 0.8 to 3.5 mol of the polycarboxylic acid anhydride (a2) is used with respect to 1 mol of the isocyanate group contained in the polyisocyanate compound (a1), and a temperature condition of about 100 to 180° C. A method of stirring and mixing under the reaction may be mentioned.

The reaction may be carried out in an organic solvent if necessary, and a basic catalyst may be used if necessary.

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; toluene, xylene and solvent. Aromatic solvents such as naphtha; Alicyclic solvents such as cyclohexane and methylcyclohexane; Alcohol solvents such as carbitol, cellosolve, methanol, isopropanol, butanol, propylene glycol monomethyl ether; alkylene glycol monoalkyl ether, dialkylene glycol monoalkyl ether And glycol ether solvents such as dialkylene glycol monoalkyl ether acetate; methoxypropanol, cyclohexanone, methyl cellosolve, diethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate and the like. These organic solvents can be used alone or in combination of two or more kinds. The amount of the organic solvent used is preferably in the range of about 0.1 to 5 times the total mass of the reaction raw materials, because the reaction efficiency will be good.

Examples of the basic catalyst include N-methylmorpholine, pyridine, 1,8-diazabicyclo[5.4.0]undecene-7 (DBU), 1,5-diazabicyclo[4.3.0]nonene- 5(DBN), 1,4-diazabicyclo[2.2.2]octane (DABCO), tri-n-butylamine or dimethylbenzylamine, butylamine, octylamine, monoethanolamine, diethanolamine, triethanolamine, imidazole, 1 -Methylimidazole, 2,4-dimethylimidazole, 1,4-diethylimidazole, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-(N-phenyl)aminopropyltrimethoxysilane, 3-( Amine compounds such as 2-aminoethyl)aminopropyltrimethoxysilane, 3-(2-aminoethyl)aminopropylmethyldimethoxysilane, tetramethylammonium hydroxide; trioctylmethylammonium chloride, trioctylmethylammonium acetate, etc. Primary ammonium salts; phosphines such as trimethylphosphine, tributylphosphine and triphenylphosphine; tetramethylphosphonium chloride, tetraethylphosphonium chloride, tetrapropylphosphonium chloride, tetrabutylphosphonium chloride, tetrabutylphosphonium bromide, trimethyl(2-hydroxypropyl)phosphonium Phosphonium salts such as chloride, triphenylphosphonium chloride, benzylphosphonium chloride; dibutyltin dilaurate, octyltin trilaurate, octyltin diacetate, dioctyltin diacetate, dioctyltin dinedecanoate, dibutyltin diacetate, tin octylate, Organotin compounds such as 1,1,3,3-tetrabutyl-1,3-dodecanoyldistannoxane; Organometallic compounds such as zinc octylate and bismuth octylate; Inorganic tin compounds such as tin octoate; Inorganic metal compounds And so on. These basic catalysts can be used alone or in combination of two or more kinds.

When the amide-imide resin (A) uses the polyisocyanate compound (a1) and the polycarboxylic acid anhydride (a2) as reaction raw materials, reaction raw materials other than these may be used depending on desired resin performance and the like. You may use together. In this case, since the effect of the present invention is sufficiently exhibited, the total mass of the polyisocyanate compound (a1) and the polycarboxylic acid anhydride (a2) with respect to the total mass of the reaction raw material of the amide imide resin (A). The proportion is preferably 90% by mass or more, and more preferably 95% by mass or more.

As the hydroxyl group-containing (meth)acrylate compound (B), other specific structures are not particularly limited as long as it is a compound having a hydroxyl group and a (meth)acryloyl group in the molecular structure, and various compounds can be used. it can. Examples thereof include hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, trimethylolpropane (meth)acrylate, trimethylolpropane di(meth)acrylate, pentaerythritol (meth)acrylate, pentaerythritol di(meth)acrylate. ) Acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol (meth)acrylate, dipentaerythritol di(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta Examples thereof include (meth)acrylate, ditrimethylolpropane (meth)acrylate, ditrimethylolpropane di(meth)acrylate, and ditrimethylolpropane tri(meth)acrylate. In addition, a (poly)oxyalkylene chain such as a (poly)oxyethylene chain, a (poly)oxypropylene chain, or a (poly)oxytetramethylene chain is introduced into the molecular structure of each of the various hydroxyl group-containing (meth)acrylate compounds ( It is also possible to use a modified poly)oxyalkylene, a modified lactone obtained by introducing a (poly)lactone structure into the molecular structure of each of the various hydroxyl group-containing (meth)acrylate compounds. These hydroxyl group-containing (meth)acrylate compounds (B) can be used alone or in combination of two or more kinds. Among these, a (meth)acrylate compound having one hydroxyl group is preferable because the reaction can be easily controlled.

The molecular weight of the hydroxyl group-containing (meth)acrylate compound (B) is 1,000 or less because a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion can be obtained. Is preferred. Further, when the hydroxyl group-containing (meth)acrylate compound (B) is an oxyalkylene modified product or a lactone modified product, the weight average molecular weight (Mw) is preferably 1,000 or less.

As the epoxy group-containing (meth)acrylate compound (C), other specific structures are not particularly limited as long as it has a (meth)acryloyl group and an epoxy group in the molecular structure, and various compounds are used. be able to. Examples thereof include glycidyl group-containing (meth)acrylate monomers such as glycidyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate glycidyl ether, and epoxycyclohexylmethyl (meth)acrylate; dihydroxybenzene diglycidyl ether and dihydroxy. Examples thereof include mono(meth)acrylate compounds of diglycidyl ether compounds such as naphthalene diglycidyl ether, biphenol diglycidyl ether, and bisphenol diglycidyl ether. These epoxy group-containing (meth)acrylate compounds (C) can be used alone or in combination of two or more kinds. Among these, a (meth)acrylate compound having one epoxy group is preferable because the reaction can be easily controlled, and a curability capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion. A glycidyl group-containing (meth)acrylate monomer is preferable because a resin composition can be obtained. The molecular weight of the glycidyl group-containing (meth)acrylate monomer is preferably 500 or less. Furthermore, the ratio of the glycidyl group-containing (meth)acrylate monomer to the total mass of the epoxy group-containing (meth)acrylate compound (C) is preferably 70% by mass or more, and more preferably 90% by mass or more. ..

As the polycarboxylic acid anhydride (D), the same polycarboxylic acid anhydride (a2) as described above can be used. These polycarboxylic acid anhydrides (D) can be used alone or in combination of two or more kinds. Further, since a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion is obtained, an aliphatic polycarboxylic acid anhydride or an alicyclic polycarboxylic acid anhydride is Aliphatic dicarboxylic acid anhydride or alicyclic dicarboxylic acid anhydride is more preferable.

The acid group-containing (meth)acrylate resin (E) is the amide imide resin (A), the hydroxyl group-containing (meth)acrylate compound (B), the epoxy group-containing (meth)acrylate depending on desired resin performance and the like. In addition to the compound (C) and the polycarboxylic acid anhydride (D), other reaction raw materials may be used in combination. In this case, since the effect of the present invention is sufficiently exhibited, the ratio of the total mass of the components (A) to (D) to the total mass of the reaction raw material of the acid group-containing (meth)acrylate resin (E) is 80. It is preferably at least mass%, more preferably at least 90 mass%.

The method for producing the acid group-containing (meth)acrylate resin (E) is not particularly limited and may be produced by any method. For example, it may be produced by a method of reacting all the reaction raw materials at once, or may be produced by a method of sequentially reacting the reaction raw materials. Among them, since the reaction can be easily controlled, the amide-imide resin (A) is reacted with the hydroxyl group-containing (meth)acrylate compound (B) (step 1), and the product of step 1 and the epoxy group-containing ( It is preferably produced by a method of reacting a (meth)acrylate compound (C) (step 2) and reacting the product of step 2 with the polycarboxylic acid anhydride (D) (step 3).

The step 1 is a reaction between the amide imide resin (A) and the hydroxyl group-containing (meth)acrylate compound (B). The reaction is mainly the acid group and/or acid in the amide imide resin (A). The anhydride group is reacted with the hydroxyl group in the hydroxyl group-containing (meth)acrylate compound (B). Since the hydroxyl group-containing (meth)acrylate compound (B) is particularly excellent in reactivity with the acid anhydride group, it is preferable that the amide imide resin (A) has an acid anhydride group as described above. The content of the acid anhydride group in the amide imide resin (A) is the difference between the above-mentioned two measured values of the acid value, that is, the acid value under the condition where the acid anhydride group is ring-opened, It can be calculated from the difference from the acid value under the condition that the acid anhydride group is not opened.

The reaction ratio between the amide imide resin (A) and the hydroxyl group-containing (meth)acrylate compound (B) is such that when the amide imide resin (A) has an acid group and an acid anhydride group, and the amide imide resin (A) is When it has an acid anhydride group, the number of moles of the hydroxyl group contained in the hydroxyl group-containing (meth)acrylate compound (B) is 0.9 to 1.1 relative to 1 mole of the acid anhydride group contained in the amide imide resin (A). It is preferable to use it within the range. When the amide imide resin (A) has an acid group, the number of moles of the hydroxyl group of the hydroxyl group-containing (meth)acrylate compound (B) is 0. 1 mole of the acid group of the amide imide resin (A). It is preferably used in the range of 1 to 0.5.

The reaction between the amide-imide resin (A) and the hydroxyl group-containing (meth)acrylate compound (B) is performed, for example, in the presence of an appropriate esterification catalyst while heating and stirring under a temperature condition of about 80 to 140°C. You can Examples of the esterification catalyst include phosphorus compounds such as trimethylphosphine, tributylphosphine and triphenylphosphine, amine compounds such as triethylamine, tributylamine and dimethylbenzylamine, 2-methylimidazole, 2-heptadecylimidazole and 2-ethyl. Examples include imidazole compounds such as -4-methylimidazole, 1-benzyl-2-methylimidazole and 1-isobutyl-2-methylimidazole. These esterification catalysts can be used alone or in combination of two or more kinds. The addition amount of the esterification catalyst is preferably 0.001 to 5 parts by mass with respect to 100 parts by mass of the total amount of the reaction raw materials.

The reaction may be carried out in an organic solvent if necessary, and an acidic catalyst may be used if necessary.

As the organic solvent, those similar to the above-mentioned organic solvents can be used, and these organic solvents can be used alone or in combination of two or more kinds. When the production of the amide-imide resin (A) and step 1 are carried out continuously, the reaction may be continued as it is in the organic solvent used in the production of the amide-imide resin (A).

Examples of the acidic catalyst include inorganic acids such as hydrochloric acid, sulfuric acid and phosphoric acid, organic acids such as methanesulfonic acid, paratoluenesulfonic acid and oxalic acid, boron trifluoride, anhydrous aluminum chloride, Lewis acids such as zinc chloride. And so on. These acidic catalysts can be used alone or in combination of two or more kinds.

The step 2 is a reaction between the product of the step 1 and the epoxy group-containing (meth)acrylate compound (C). The reaction is mainly to react the acid group in the product obtained in the step 1 with the epoxy group-containing (meth)acrylate compound. The reaction ratio is such that the number of moles of the epoxy group contained in the epoxy group-containing (meth)acrylate compound (C) is 0.7 to 1.2 with respect to 1 mole of the acid group in the product obtained in step 1. It is preferable to use in the range of 0.9 to 1.1, and it is more preferable to use in the range of 0.9 to 1.1. The reaction of step 2 can be carried out, for example, in the presence of a suitable esterification catalyst while heating and stirring under a temperature condition of about 90 to 140°C. When step 1 and step 2 are carried out continuously, the esterification catalyst may not be added, or may be added appropriately. Further, the reaction may be carried out in an organic solvent, if necessary. The esterification catalyst and the organic solvent may be the same as the above-mentioned esterification catalyst and the organic solvent, and these may be used alone or in combination of two or more kinds.

The step 3 is a reaction between the product of the step 2 and the polycarboxylic acid anhydride (D). The reaction is mainly to react the hydroxyl group in the product obtained in the step 2 with the polycarboxylic acid anhydride (D). In the product of the step 2, for example, a hydroxyl group generated by ring opening of the epoxy group in the epoxy group-containing (meth)acrylate compound (C) is present. The reaction ratio of the polycarboxylic acid anhydride (D) is preferably adjusted so that the acid value of the product (meth)acrylate resin (E) containing acid group is about 60 to 120 mgKOH/g. The reaction of step 3 can be carried out, for example, in the presence of a suitable esterification catalyst while heating and stirring under a temperature condition of about 80 to 140°C. When step 2 and step 3 are carried out continuously, the esterification catalyst may not be added, or may be added appropriately. Further, the reaction may be carried out in an organic solvent, if necessary. The esterification catalyst and the organic solvent may be the same as the above-mentioned esterification catalyst and the organic solvent, and these may be used alone or in combination of two or more kinds.

The acid value of the acid group-containing (meth)acrylate resin (E) is 50 to 50 because a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion can be obtained. The range of 120 mgKOH/g is preferable, and the range of 60 to 110 mgKOH/g is more preferable. The acid value of the acid group-containing (meth)acrylate resin in the present invention is a value measured by the neutralization titration method of JIS K 0070 (1992).

The weight average molecular weight (Mw) of the acid group-containing (meth)acrylate resin (E) is preferably in the range of 1,000 to 20,000. In addition, in this invention, a weight average molecular weight (Mw) shows the value measured by the gel permeation chromatography (GPC) method.

The acid group-containing (meth)acrylate resin composition (i) may contain a resin component other than the acid group-containing (meth)acrylate resin described above. Examples of the other resin component include a resin (F) having an acid group and a polymerizable unsaturated bond, various (meth)acrylate monomers, and the like.

The resin (F) having an acid group and a polymerizable unsaturated bond may be any resin having an acid group and a polymerizable unsaturated bond in the resin, for example, an acid group and a polymerizable unsaturated bond Epoxy resin having, urethane resin having acid group and polymerizable unsaturated bond, acrylic resin having acid group and polymerizable unsaturated bond, amide imide resin having acid group and polymerizable unsaturated bond, acid group and polymerizable unsaturated Examples thereof include an acrylamide resin having a bond.

Examples of the acid group include a carboxyl group, a sulfonic acid group, a phosphoric acid group, and the like.

Examples of the epoxy resin having an acid group and a polymerizable unsaturated bond include, for example, an epoxy resin, an unsaturated monobasic acid, and an acid group-containing epoxy (meth)acrylate resin that uses polybasic acid anhydride as an essential reaction raw material. , An epoxy resin, an unsaturated monobasic acid, a polybasic acid anhydride, a polyisocyanate compound, and an acid group- and urethane group-containing epoxy (meth)acrylate resin using a hydroxyl group-containing (meth)acrylate compound as a reaction raw material.

Examples of the epoxy resin include bisphenol type epoxy resin, phenylene ether type epoxy resin, naphthylene ether type epoxy resin, biphenyl type epoxy resin, triphenylmethane type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, Bisphenol novolac type epoxy resin, naphthol novolac type epoxy resin, naphthol-phenol co-contracting novolac type epoxy resin, naphthol-cresol co-contracting novolac type epoxy resin, phenol aralkyl type epoxy resin, naphthol aralkyl type epoxy resin, dicyclopentadiene-phenol addition Examples thereof include reactive epoxy resins, biphenylaralkyl epoxy resins, fluorene epoxy resins, xanthene epoxy resins, dihydroxybenzene epoxy resins, trihydroxybenzene epoxy resins and the like. These epoxy resins can be used alone or in combination of two or more kinds.

The unsaturated monobasic acid means a compound having an acid group and a polymerizable unsaturated bond in one molecule. Examples of the acid group include a carboxyl group, a sulfonic acid group, a phosphoric acid group, and the like. Examples of the unsaturated monobasic acid (D) include acrylic acid, methacrylic acid, crotonic acid, cinnamic acid, α-cyanocinnamic acid, β-styrylacrylic acid, β-furfurylacrylic acid, and the like. Further, esterified products of unsaturated monobasic acids, acid halides, acid anhydrides and the like can also be used. These unsaturated monobasic acids can be used alone or in combination of two or more kinds.

Examples of the polybasic acid anhydrides include phthalic anhydride, succinic anhydride, trimellitic anhydride, pyromellitic anhydride, maleic anhydride, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, methylnadic acid anhydride, and hexahydro. Examples thereof include phthalic anhydride, methylhexahydrophthalic anhydride, octenyl succinic anhydride and tetrapropenyl succinic anhydride. These polybasic acid anhydrides can be used alone or in combination of two or more kinds. Among these, tetrahydrophthalic anhydride and succinic anhydride are preferable because a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion can be obtained.

As the polyisocyanate compound, the same polyisocyanate compound (a1) as described above can be used, and the polyisocyanate compound can be used alone or in combination of two or more kinds.

As the hydroxyl group-containing (meth)acrylate compound, the same as the above-mentioned hydroxyl group-containing (meth)acrylate compound (B) can be used, and the hydroxyl group-containing (meth)acrylate compound may be used alone or in two kinds. The above can also be used together.

The method for producing the epoxy resin having an acid group and a polymerizable unsaturated bond is not particularly limited and may be produced by any method. The production of the epoxy resin having an acid group and a polymerizable unsaturated bond may be carried out in an organic solvent if necessary, and a basic catalyst may be used if necessary.

As the organic solvent, the same organic solvents as described above can be used, and the organic solvent can be used alone or in combination of two or more kinds.

As the basic catalyst, the same basic catalysts as described above can be used, and the basic catalysts can be used alone or in combination of two or more kinds.

The urethane resin having an acid group and a polymerizable unsaturated bond, for example, a polyisocyanate compound, a hydroxyl group-containing (meth) acrylate compound, a carboxyl group-containing polyol compound, and optionally a polybasic acid anhydride, the carboxyl group Those obtained by reacting with a polyol compound other than the containing polyol compound, a polyisocyanate compound, a hydroxyl group-containing (meth)acrylate compound, a polybasic acid anhydride, and a polyol compound other than the carboxyl group-containing polyol compound And the like.

As the polyisocyanate compound, the same polyisocyanate compound (a1) as described above can be used, and the polyisocyanate compound can be used alone or in combination of two or more kinds.

As the hydroxyl group-containing (meth)acrylate compound, the same as the above-mentioned hydroxyl group-containing (meth)acrylate compound (B) can be used, and the hydroxyl group-containing (meth)acrylate compound may be used alone or in two kinds. The above can also be used together.

Examples of the carboxyl group-containing polyol compound include 2,2-dimethylolpropionic acid, 2,2-dimethylolbutanoic acid, and 2,2-dimethylolvaleric acid. The carboxyl group-containing polyol compound may be used alone or in combination of two or more kinds.

As the polybasic acid anhydride, the same polybasic acid anhydride as described above can be used, and the polybasic acid anhydride can be used alone or in combination of two or more kinds.

Examples of the polyol compounds other than the carboxyl group-containing polyol compound include aliphatic polyol compounds such as ethylene glycol, propylene glycol, butanediol, hexanediol, glycerin, trimethylolpropane, ditrimethylolpropane, pentaerythritol, and dipentaerythritol; Aromatic polyol compounds such as biphenol and bisphenol; (Poly)oxyethylene chains such as (poly)oxyethylene chains, (poly)oxypropylene chains, and (poly)oxytetramethylene chains in the molecular structures of the various polyol compounds described above. Modified (poly)oxyalkylene modified products; lactone modified products in which a (poly)lactone structure is introduced into the molecular structures of the various polyol compounds are included. The polyol compounds other than the carboxyl group-containing polyol compound may be used alone or in combination of two or more kinds.

The method for producing the urethane resin having an acid group and a polymerizable unsaturated bond is not particularly limited and may be produced by any method. The production of the urethane resin having an acid group and a polymerizable unsaturated bond may be carried out in an organic solvent if necessary, and a basic catalyst may be used if necessary.

As the organic solvent, the same organic solvents as described above can be used, and the organic solvent can be used alone or in combination of two or more kinds.

As the basic catalyst, the same basic catalysts as described above can be used, and the basic catalysts can be used alone or in combination of two or more kinds.

As the acrylic resin having an acid group and a polymerizable unsaturated bond, for example, a (meth)acrylate compound (α) having a reactive functional group such as a hydroxyl group, a carboxyl group, an isocyanate group, and a glycidyl group is polymerized as an essential component. A reaction obtained by introducing a (meth)acryloyl group by further reacting the acrylic resin intermediate thus obtained with a (meth)acrylate compound (β) having a reactive functional group capable of reacting with these functional groups. Examples thereof include products and products obtained by reacting a polybasic acid anhydride with the hydroxyl groups in the reaction product.

The acrylic resin intermediate may be a copolymer of other polymerizable unsaturated group-containing compound, if necessary, in addition to the (meth)acrylate compound (α). Examples of the other polymerizable unsaturated group-containing compound include (meth) such as methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, and 2-ethylhexyl (meth)acrylate. Acrylic acid alkyl ester; alicyclic structure-containing (meth)acrylate such as cyclohexyl (meth)acrylate, isobornyl (meth)acrylate, dicyclopentanyl (meth)acrylate; phenyl (meth)acrylate, benzyl (meth)acrylate, phenoxy Examples thereof include aromatic ring-containing (meth)acrylates such as ethyl acrylate; silyl group-containing (meth)acrylates such as 3-methacryloxypropyltrimethoxysilane; styrene derivatives such as styrene, α-methylstyrene and chlorostyrene. These may be used alone or in combination of two or more.

The (meth)acrylate compound (β) is not particularly limited as long as it can react with the reactive functional group of the (meth)acrylate compound (α), but the following combination is used from the viewpoint of reactivity. Is preferred. That is, when a hydroxyl group-containing (meth)acrylate is used as the (meth)acrylate compound (α), an isocyanate group-containing (meth)acrylate is preferably used as the (meth)acrylate compound (β). When a carboxyl group-containing (meth)acrylate is used as the (meth)acrylate compound (α), it is preferable to use a glycidyl group-containing (meth)acrylate as the (meth)acrylate compound (β). When an isocyanate group-containing (meth)acrylate is used as the (meth)acrylate compound (α), a hydroxyl group-containing (meth)acrylate is preferably used as the (meth)acrylate compound (β). When a glycidyl group-containing (meth)acrylate is used as the (meth)acrylate compound (α), a carboxyl group-containing (meth)acrylate is preferably used as the (meth)acrylate compound (β). The (meth)acrylate compound (β) can be used alone or in combination of two or more kinds.

As the polybasic acid anhydride, the same polybasic acid anhydride as described above can be used, and the polybasic acid anhydride can be used alone or in combination of two or more kinds.

The method for producing the acrylic resin having an acid group and a polymerizable unsaturated bond is not particularly limited and may be produced by any method. The production of the acrylic resin having an acid group and a polymerizable unsaturated bond may be carried out in an organic solvent if necessary, and a basic catalyst may be used if necessary.

As the organic solvent, the same organic solvents as described above can be used, and the organic solvent can be used alone or in combination of two or more kinds.

As the basic catalyst, the same basic catalysts as described above can be used, and the basic catalysts can be used alone or in combination of two or more kinds.

Examples of the amide imide resin having an acid group and a polymerizable unsaturated bond include an amide imide resin having an acid group and/or an acid anhydride group, a hydroxyl group-containing (meth)acrylate compound and/or an epoxy group-containing (meth)acrylate. Examples thereof include those obtained by reacting a compound with a compound having at least one reactive functional group selected from the group consisting of a hydroxyl group, a carboxyl group, an isocyanate group, a glycidyl group, and an acid anhydride group. To be The compound having a reactive functional group may or may not have a (meth)acryloyl group.

The amide-imide resin may have only one of an acid group and an acid anhydride group, or may have both. From the viewpoint of reactivity and reaction control with a hydroxyl group-containing (meth)acrylate compound or a (meth)acryloyl group-containing epoxy compound, it is preferable to have an acid anhydride group, and both an acid group and an acid anhydride group. It is more preferable to have The acid value of the amide-imide resin is preferably in the range of 60 to 350 mgKOH/g, as measured under neutral conditions, that is, under conditions where the acid anhydride group is not opened. On the other hand, the measured value under the condition that the acid anhydride group is ring-opened, such as in the presence of water, is preferably in the range of 61 to 360 mgKOH/g.

Examples of the amide-imide resin include those obtained by using a polyisocyanate compound and a polybasic acid anhydride as a reaction raw material.

As the polyisocyanate compound, the same polyisocyanate compound (a1) as described above can be used, and the polyisocyanate compound can be used alone or in combination of two or more kinds.

As the polybasic acid anhydride, the same polybasic acid anhydride as described above can be used, and the polybasic acid anhydride can be used alone or in combination of two or more kinds.

In addition to the polyisocyanate compound and the polybasic acid anhydride, a polybasic acid may be used in combination with the amide-imide resin as a reaction raw material, if necessary.

As the polybasic acid, any compound can be used as long as it is a compound having two or more carboxyl groups in one molecule. For example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, hexahydro Phthalic acid, methylhexahydrophthalic acid, citraconic acid, itaconic acid, glutaconic acid, 1,2,3,4-butanetetracarboxylic acid, cyclohexanetricarboxylic acid, cyclohexanetetracarboxylic acid, bicyclo[2.2.1]heptane- 2,3-dicarboxylic acid, methylbicyclo[2.2.1]heptane-2,3-dicarboxylic acid, 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydro Naphthalene-1,2-dicarboxylic acid, trimellitic acid, pyromellitic acid, naphthalene dicarboxylic acid, naphthalene tricarboxylic acid, naphthalene tetracarboxylic acid, biphenyl dicarboxylic acid, biphenyl tricarboxylic acid, biphenyl tetracarboxylic acid, benzophenone tetracarboxylic acid, etc. To be As the polybasic acid, for example, a copolymer of a conjugated diene vinyl monomer and acrylonitrile, which has a carboxyl group in its molecule, can also be used. These polybasic acids can be used alone or in combination of two or more kinds.

As the hydroxyl group-containing (meth)acrylate compound, the same as the above-mentioned hydroxyl group-containing (meth)acrylate compound (B) can be used, and the hydroxyl group-containing (meth)acrylate compound may be used alone or in two kinds. The above can also be used together.

The same epoxy group-containing (meth)acrylate compound as the above-mentioned epoxy group-containing (meth)acrylate compound (C) can be used, and the epoxy group-containing (meth)acrylate compound can be used alone. It is also possible to use two or more kinds in combination.

The method for producing the amide-imide resin having an acid group and a polymerizable unsaturated bond is not particularly limited and may be produced by any method. The amide-imide resin having an acid group and a polymerizable unsaturated bond may be produced in an organic solvent, if necessary, and a basic catalyst may be used, if necessary.

As the organic solvent, the same organic solvents as described above can be used, and the organic solvent can be used alone or in combination of two or more kinds.

As the basic catalyst, the same basic catalysts as described above can be used, and the basic catalysts can be used alone or in combination of two or more kinds.

Examples of the acrylamide resin having an acid group and a polymerizable unsaturated bond include a phenolic hydroxyl group-containing compound, an alkylene oxide or an alkylene carbonate, an N-alkoxyalkyl (meth)acrylamide compound, and a polybasic acid anhydride. Examples thereof include those obtained by reacting with an unsaturated monobasic acid, if necessary.

The phenolic hydroxyl group-containing compound refers to a compound having at least two phenolic hydroxyl groups in the molecule. Examples of the compound having at least two phenolic hydroxyl groups in the molecule include compounds represented by the following structural formulas (3-1) to (3-4).

In the structural formulas (3-1) to (3-4), R ¹ is any of an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryl group, and a halogen atom. , R ² are each independently a hydrogen atom or a methyl group. Further, p is 0 or an integer of 1 or more, preferably 0 or an integer of 1 to 3, more preferably 0 or 1, and further preferably 0. q is an integer of 2 or more, preferably 2 or 3. The position of the substituent on the aromatic ring in the above structural formula is arbitrary, and for example, in the naphthalene ring of the structural formula (3-2), it may be substituted on any ring, and the structural formula ( In 3-3), it may be substituted on any ring of the benzene ring present in one molecule, and in structural formula (3-4), it may be substituted on any ring of the benzene ring present in one molecule. It indicates that they may be substituted, and the number of substituents in one molecule is p and q.

Further, as the phenolic hydroxyl group-containing compound, for example, a compound having one phenolic hydroxyl group in the molecule and a compound represented by any of the following structural formulas (x-1) to (x-5) are essential. Of the reaction product used as the reaction raw material, a compound having at least two phenolic hydroxyl groups in the molecule, and a compound represented by any of the following structural formulas (x-1) to (x-5) A reaction product as a raw material can also be used. In addition, a novolac type phenol resin using one or more compounds having one phenolic hydroxyl group in the molecule as a reaction raw material, and one or more compounds having at least two phenolic hydroxyl groups in the molecule It is also possible to use a novolac-type phenol resin as a reaction raw material.

［式（ｘ−１）中、ｈは０または１である。式（ｘ−２）〜（ｘ−５）中、Ｒ^３は、炭素原子数１〜２０のアルキル基、炭素原子数１〜２０のアルコキシ基、アリール基、ハロゲン原子の何れかであり、ｉは、０または１〜４の整数である。式（ｘ−２）、（ｘ−３）及び（ｘ−５）中、Ｚは、ビニル基、ハロメチル基、ヒドロキシメチル基、アルキルオキシメチル基の何れかである。式（ｘ−５）中、Ｙは、炭素原子数１〜４のアルキレン基、酸素原子、硫黄原子、カルボニル基の何れかであり、ｊは１〜４の整数である。］

[In the formula (x-1), h is 0 or 1. In formulas (x-2) to (x-5), R ³ is any of an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryl group, and a halogen atom, and i Is 0 or an integer of 1 to 4. In formulas (x-2), (x-3) and (x-5), Z is any of a vinyl group, a halomethyl group, a hydroxymethyl group and an alkyloxymethyl group. In formula (x-5), Y is an alkylene group having 1 to 4 carbon atoms, an oxygen atom, a sulfur atom, or a carbonyl group, and j is an integer of 1 to 4. ]

Examples of the compound having one phenolic hydroxyl group in the molecule include compounds represented by the following structural formulas (2-1) to (2-4).

In the above structural formulas (4-1) to (4-4), R ⁴ is any of an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryl group, and a halogen atom. , R ⁵ are each independently a hydrogen atom or a methyl group. Further, p is 0 or an integer of 1 or more, preferably 0 or an integer of 1 to 3, more preferably 0 or 1, and further preferably 0. The position of the substituent on the aromatic ring in the above structural formula is arbitrary, and for example, in the naphthalene ring of the structural formula (4-2), the substituent may be substituted on any ring, and the structural formula ( In 4-3), it may be substituted on any ring of the benzene ring present in one molecule, and in structural formula (4-4), it may be substituted on any ring of the benzene ring present in one molecule. It indicates that they may be replaced.

As the compound having at least two phenolic hydroxyl groups in the molecule, the compounds represented by the above structural formulas (3-1) to (3-4) can be used.

These phenolic hydroxyl group-containing compounds can be used alone or in combination of two or more kinds.

Examples of the alkylene oxide include ethylene oxide, propylene oxide, butylene oxide, pentylene oxide and the like. Among these, ethylene oxide or propylene oxide is preferable because a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion can be obtained. The alkylene oxides may be used alone or in combination of two or more.

Examples of the alkylene carbonate include ethylene carbonate, propylene carbonate, butylene carbonate, pentylene carbonate and the like. Among these, ethylene carbonate or propylene carbonate is preferable because a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion can be obtained. The alkylene carbonates may be used alone or in combination of two or more.

Examples of the N-alkoxyalkyl(meth)acrylamide compound include N-methoxymethyl(meth)acrylamide, N-ethoxymethyl(meth)acrylamide, N-butoxymethyl(meth)acrylamide, N-methoxyethyl(meth)acrylamide. , N-ethoxyethyl (meth)acrylamide, N-butoxyethyl (meth)acrylamide and the like. The N-alkoxyalkyl (meth)acrylamide compounds may be used alone or in combination of two or more.

As the polybasic acid anhydride, the same polybasic acid anhydride as described above can be used, and the polybasic acid anhydride can be used alone or in combination of two or more kinds.

As the unsaturated monobasic acid, the same as the above-mentioned unsaturated monobasic acid can be used, and the unsaturated monobasic acid can be used alone or in combination of two or more kinds.

The method for producing the acrylamide resin having an acid group and a polymerizable unsaturated bond is not particularly limited and may be produced by any method. The production of the acrylamide resin having an acid group and a polymerizable unsaturated bond may be carried out in an organic solvent, if necessary, and a basic catalyst and an acidic catalyst may be used, if necessary.

As the organic solvent, the same organic solvents as described above can be used, and the organic solvent can be used alone or in combination of two or more kinds.

As the basic catalyst, the same basic catalysts as described above can be used, and the basic catalysts can be used alone or in combination of two or more kinds.

The same acidic catalyst as described above can be used as the acidic catalyst, and the acidic catalyst can be used alone or in combination of two or more kinds.

The amount of the resin (E) having an acid group and a polymerizable unsaturated bond used is preferably in the range of 10 to 900 parts by mass with respect to 100 parts by mass of the acid group-containing (meth)acrylate resin of the present invention.

Examples of the various (meth)acrylate monomers include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, 2 -Aliphatic mono(meth)acrylate compounds such as ethylhexyl(meth)acrylate and octyl(meth)acrylate; alicyclic mono(meth)acrylates such as cyclohexyl(meth)acrylate, isobornyl(meth)acrylate and adamantyl mono(meth)acrylate Acrylate compounds; Heterocyclic mono(meth)acrylate compounds such as glycidyl (meth)acrylate and tetrahydrofurfuryl acrylate; 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, benzylbenzyl (meth)acrylate, phenylphenoxyethyl (meth)acrylate, etc. (Meth)acrylate compounds such as aromatic mono(meth)acrylate compounds: (poly)oxyethylene chain, (poly)oxypropylene chain, (poly)oxy in the molecular structure of the various mono(meth)acrylate monomers A (poly)oxyalkylene-modified mono(meth)acrylate compound having a polyoxyalkylene chain such as a tetramethylene chain introduced therein; a lactone-modified mono compound having a (poly)lactone structure introduced into the molecular structure of each of the various mono(meth)acrylate compounds (Meth)acrylate compound; aliphatic such as ethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, butanediol di(meth)acrylate, hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate Di(meth)acrylate compound; 1,4-cyclohexanedimethanol di(meth)acrylate, norbornane di(meth)acrylate, norbornane dimethanol di(meth)acrylate, dicyclopentanyl di(meth)acrylate, tricyclodecane di Alicyclic di(meth)acrylate compounds such as methanol di(meth)acrylate; biphenol di(meth)acrylate, bisphe Aromatic di(meth)acrylate compounds such as diol(meth)acrylate; (poly)oxyethylene chains, (poly)oxypropylene chains, and (poly)oxytetramethylene in the molecular structures of the various di(meth)acrylate compounds. A polyoxyalkylene-modified di(meth)acrylate compound having a (poly)oxyalkylene chain such as a chain introduced thereinto; a lactone-modified di(meth) having a (poly)lactone structure introduced into the molecular structure of each of the above di(meth)acrylate compounds ) Acrylate compound; Aliphatic tri(meth)acrylate compound such as trimethylolpropane tri(meth)acrylate and glycerin tri(meth)acrylate; (Poly)oxyethylene chain in the molecular structure of the aliphatic tri(meth)acrylate compound. A (poly)oxyalkylene-modified tri(meth)acrylate compound introduced with a (poly)oxyalkylene chain such as a (poly)oxypropylene chain or a (poly)oxytetramethylene chain; a molecule of the aliphatic tri(meth)acrylate compound A lactone-modified tri(meth)acrylate compound having a (poly)lactone structure introduced into the structure; pentaerythritol tetra(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, etc. An aliphatic poly(meth)acrylate compound of (poly)oxyethylene chain, (poly)oxypropylene chain, (poly)oxytetramethylene chain or the like in the molecular structure of the aliphatic poly(meth)acrylate compound A tetra- or higher functional (poly)oxyalkylene-modified poly(meth)acrylate compound having an oxyalkylene chain introduced; a tetra-functional or higher functional lactone having a (poly)lactone structure introduced into the molecular structure of the aliphatic poly(meth)acrylate compound Examples include modified poly(meth)acrylate compounds. The various (meth)acrylate monomers may be used alone or in combination of two or more.

An epoxy resin is essentially used as the curing agent (ii).

The epoxy resin is not particularly limited as long as it has an epoxy group in the molecule, and various compounds can be used. For example, bisphenol type epoxy resin, phenylene ether type epoxy resin, naphthylene ether type epoxy resin, biphenyl type epoxy resin, triphenylmethane type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, bisphenol novolac type epoxy resin, Naphthol novolac type epoxy resin, naphthol-phenol co-condensed novolac type epoxy resin, naphthol-cresol co-contracted novolac type epoxy resin, phenol aralkyl type epoxy resin, naphthol aralkyl type epoxy resin, dicyclopentadiene-phenol addition reaction type epoxy resin, biphenyl Examples thereof include aralkyl type epoxy resin, fluorene type epoxy resin, xanthene type epoxy resin, dihydroxybenzene type epoxy resin and trihydroxybenzene type epoxy resin. These epoxy resins can be used alone or in combination of two or more kinds. Further, among these, since a curable resin composition capable of forming a cured product having excellent heat resistance, elongation and substrate adhesion is obtained, phenol novolac type epoxy resin, cresol novolac type epoxy resin, bisphenol Novolak type epoxy resin such as novolac type epoxy resin, naphthol novolac type epoxy resin, naphthol-phenol co-condensed novolac type epoxy resin, naphthol-cresol co-condensed novolac type epoxy resin is preferable, and the softening point is in the range of 20 to 120°C. Those are particularly preferable.

The amount of the curing agent (ii) used is such that the number of moles of the epoxy group contained in the curing agent (ii) is 0.7 with respect to 1 mole of the acid group contained in the acid group-containing (meth)acrylate resin composition (i). Used in the range of up to 1.7.

The curable resin composition of the present invention, if necessary, a photopolymerization initiator, a curing accelerator, an organic solvent, inorganic fine particles or polymer fine particles, a pigment, a defoaming agent, a viscosity modifier, a leveling agent, a flame retardant, It may also contain various additives such as a storage stabilizer.

As the photopolymerization initiator, an appropriate one may be selected and used depending on the type of active energy ray to be irradiated. Further, it may be used in combination with a photosensitizer such as an amine compound, a urea compound, a sulfur-containing compound, a phosphorus-containing compound, a chlorine-containing compound and a nitrile compound. Specific examples of the photopolymerization initiator include, for example, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1,2-(dimethylamino). 2-[(4-methylphenyl)methyl]-1-[4-(4-morpholinyl)phenyl]-1-butanone and other alkylphenone photoinitiators; 2,4,6-trimethylbenzoyl-diphenyl- Examples thereof include acylphosphine oxide-based photopolymerization initiators such as phosphine oxide; intramolecular hydrogen abstraction type photopolymerization initiators such as benzophenone compounds. These may be used alone or in combination of two or more.

Examples of the photopolymerization initiator include 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, and 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-morpholinopropane-1- On, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-1-butanone and the like.

Examples of commercial products of the other photopolymerization initiators include "Omnirad-1173", "Omnirad-184", "Omnirad-127", "Omnirad-2959", "Omnirad-369", and "Omnirad-379". , "Omnirad-907", "Omnirad-4265", "Omnirad-1000", "Omnirad-651", "Omnirad-TPO", "Omnirad-819", "Omnirad-2022", "Omnirad-2100", "Omnirad-2100". Omnirad-754", "Omnirad-784", "Omnirad-500", "Omnirad-81" (manufactured by IGM), "Kayacure-DETX", "Kayacure-MBP", "Kayacure-DMBI", "Kayacure-EPA". , "Kayacure-OA" (manufactured by Nippon Kayaku Co., Ltd.), "Bicure-10", "Bicure-55" (manufactured by Stofa Chemical Co., Ltd.), "Trigonal P1" (manufactured by Akzo), "Sandray 1000" ( Sands), "Deep" (Apjon), "Quantacure-PDO", "Quantacure-ITX", "Quantacure-EPD" (Word Brenkinsop), "Runtecure-1104" (Runtec) Manufactured by the company) and the like. These photopolymerization initiators can be used alone or in combination of two or more kinds.

The amount of the photopolymerization initiator added is, for example, preferably in the range of 0.05 to 15% by mass, and in the range of 0.1 to 10% by mass, based on the total amount of the components other than the solvent of the curable resin composition. Is more preferable.

The curing accelerator accelerates the curing reaction of the curing agent, and when an epoxy resin is used as the curing agent, a phosphorus compound, a tertiary amine, imidazole, an organic acid metal salt, a Lewis acid. , Amine complex salts and the like. These curing accelerators can be used alone or in combination of two or more kinds. In addition, the addition amount of the curing accelerator is preferably within a range of 1 to 10 parts by mass with respect to 100 parts by mass of the curing agent.

As the organic solvent, those similar to the above-mentioned organic solvents can be used, and these organic solvents can be used alone or in combination of two or more kinds.

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

As a source of ultraviolet rays, ultraviolet lamps are generally used in terms of practicality and economy. Specific examples thereof include a low pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a xenon lamp, a gallium lamp, a metal halide lamp, sunlight, and an LED.

Integrated light quantity of the active energy ray is not particularly limited, it is preferably from 10~5,000mJ / cm ^2, more preferably 50~1,000mJ / cm ^2. When the integrated light amount is within the above range, it is possible to prevent or suppress the generation of an uncured portion, which is preferable.

The irradiation of the active energy ray may be performed in one step or may be performed in two or more steps.

Further, since the cured product of the present invention has excellent heat resistance, elongation and substrate adhesion, for example, in semiconductor device applications, solder resists, interlayer insulating materials, package materials, underfill materials, circuit elements, etc. Can be suitably used as a package adhesive layer or an adhesive layer between an integrated circuit element and a circuit board. Further, it can be suitably used as a thin film transistor protective film, a liquid crystal color filter protective film, a color filter pigment resist, a black matrix resist, a spacer and the like in a thin display application represented by LCD and OELD. Among them, it can be particularly preferably used for solder resist applications.

The resin material for solder resist of the present invention comprises the curable resin composition.

The resist member of the present invention is, for example, a photomask on which a desired pattern is formed after applying the resin material for solder resist on a substrate and evaporating and drying an organic solvent in a temperature range of about 60 to 100°C. Through exposure with an active energy ray, the unexposed area is developed with an alkaline aqueous solution, and then heat-cured in a temperature range of about 140 to 200°C.

Examples of the base material include metal foils such as copper foil and aluminum foil.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

The acid value of the acid group-containing (meth)acrylate resin in the examples of the present application was measured by the neutralization titration method of JIS K 0070 (1992).

In the examples of the present application, the molecular weight of the acid group-containing (meth)acrylate resin was measured by GPC under the following conditions.

Measuring device: "HLC-8220 GPC" manufactured by Tosoh Corporation,
Column: Tosoh Co., Ltd. guard column "HXL-L"
+ "TSK-GEL G2000HXL" manufactured by Tosoh Corporation
+ "TSK-GEL G2000HXL" manufactured by Tosoh Corporation
+ "TSK-GEL G3000HXL" manufactured by Tosoh Corporation
+ "TSK-GEL G4000HXL" manufactured by Tosoh Corporation
Detector: RI (differential refractometer)
Data processing: "GPC-8020 model II version 4.10" manufactured by Tosoh Corporation
Measurement conditions: Column temperature 40°C
Developing solvent Tetrahydrofuran
Flow rate 1.0 ml/min Standard: The following monodisperse polystyrene having a known molecular weight was used according to the measurement manual of “GPC-8020 model II version 4.10”.
(Polystyrene used)
Tosoh Corporation "A-500"
Tosoh Corporation "A-1000"
Tosoh Corporation "A-2500"
Tosoh Corporation "A-5000"
Tosoh Corporation "F-1"
Tosoh Corporation "F-2"
Tosoh Corporation “F-4”
Tosoh Corporation "F-10"
Tosoh Corporation "F-20"
Tosoh Corporation "F-40"
Tosoh Corporation "F-80"
Tosoh Corporation "F-128"
Sample: 1.0% by mass tetrahydrofuran solution in terms of resin solid content filtered through a microfilter (50 μl)

(Synthesis Example 1: Production of acid group-containing (meth)acrylate resin (1))
In a flask equipped with a thermometer, a stirrer, and a reflux condenser, 378.9 parts by mass of diethylene glycol monomethyl ether acetate, an isocyanurate modified product of isophorone diisocyanate (“VESTANAT T-1890/100” manufactured by EVONIK, isocyanate group content (17.2 mass %) 185.2 mass parts, trimellitic anhydride 145.6 mass parts, and dibutylhydroxytoluene 1.6 mass parts were added and dissolved. The reaction was carried out at 160° C. for 5 hours in a nitrogen atmosphere, and it was confirmed that the isocyanate group content was 0.1% by mass or less. 0.3 parts by weight of methoquinone, 112.0 parts by weight of pentaerythritol polyacrylate mixture (“Aronix M-306” manufactured by Toagosei Co., Ltd., pentaerythritol triacrylate content of about 67%, hydroxyl value of 159.7 mg KOH/g) and 11 3.1 parts by mass of phenylphosphine was added, and the mixture was reacted at 110° C. for 5 hours while blowing air. Next, 125.1 parts by mass of glycidyl methacrylate was added and reacted at 110°C for 5 hours. Further, 86.7 parts by mass of succinic anhydride was added and reacted at 110° C. for 5 hours to obtain a target acid group-containing (meth)acrylate resin (1). The acid value of the solid content of this acid group-containing (meth)acrylate resin (1) was 73 mgKOH/g, and the weight average molecular weight was 3890.

(Synthesis Example 2: Production of acid group-containing (meth)acrylate resin (2))
In a flask equipped with a thermometer, a stirrer, and a reflux condenser, 275.5 parts by mass of diethylene glycol monomethyl ether acetate, 213.9 parts by mass of isophorone diisocyanate, 277.4 parts by mass of trimellitic anhydride, and 1.9 parts of dibutylhydroxytoluene. Part by mass was added and dissolved. The reaction was carried out at 160° C. for 5 hours in a nitrogen atmosphere, and it was confirmed that the isocyanate group content was 0.1% by mass or less. 0.4 parts by weight of methoquinone, 85.3 parts by weight of pentaerythritol polyacrylate mixture (“Aronix M-306” manufactured by Toagosei Co., Ltd., pentaerythritol triacrylate content of about 67%, hydroxyl value of 159.7 mg KOH/g) and 85.3 parts by weight. 3.9 parts by mass of phenylphosphine was added, and the mixture was reacted at 110° C. for 5 hours while blowing air. Then, 138.2 parts by mass of glycidyl methacrylate was added, and the mixture was reacted at 110° C. for 5 hours. Further, 94.4 parts by mass of succinic anhydride was added and reacted at 110° C. for 5 hours to obtain an acid group-containing (meth)acrylate resin (2). The acid value of the solid content of the acid group-containing (meth)acrylate resin (2) was 75 mgKOH/g, and the weight average molecular weight was 4920.

(Comparative Synthesis Example 1: Production of Acid Group-Containing Acrylate Resin (3))
A flask equipped with a thermometer, a stirrer, and a reflux condenser was charged with 101 parts by mass of diethylene glycol monomethyl ether acetate, and orthocresol novolac type epoxy resin (“ICPILON N-680” manufactured by DIC Corporation, epoxy equivalent: 214) 428 After dissolving 4 parts by mass of dibutylhydroxytoluene as an antioxidant and 0.4 parts by mass of methquinone as a thermal polymerization inhibitor, 144 parts by mass of acrylic acid and 1.6 parts by mass of triphenylphosphine were added. Then, the esterification reaction was carried out at 120° C. for 10 hours while blowing air. Then, 311 parts by mass of diethylene glycol monomethyl ether acetate and 160 parts by mass of tetrahydrophthalic anhydride were added and reacted at 110° C. for 2.5 hours to obtain the target acid group-containing acrylate resin (3). The acid value of the solid content of the acid group-containing acrylate resin (3) was 85 mgKOH/g.

(Example 1: Preparation of curable resin composition (1))
The acid group-containing (meth)acrylate resin (1) obtained in Synthesis Example 1, an orthocresol novolac type epoxy resin as a curing agent (“EPICLON N-680” manufactured by DIC Corporation), and 2-methyl-1 as a photopolymerization initiator. -(4-Methylthiophenyl)-2-morpholinopropan-1-one ("Omnirad-907" manufactured by IGM) and diethylene glycol monomethyl ether acetate as an organic solvent were mixed in a mass ratio shown in Table 1 to prepare a curable resin. A composition (1) was obtained.

(Examples 2 to 6: Preparation of curable resin compositions (2) to (6))
The acid group-containing (meth)acrylate resin (1) and the curing agent used in Example 1 were replaced by the compositions and blending amounts shown in Table 1, and curable resin compositions (2) to (6) were prepared in the same manner as in Example 1. ) Got.

(Comparative Examples 1 to 5: Preparation of curable resin compositions (C1) to (C5))
Curable resin compositions (C1) to (C5) in the same manner as in Example 1 except that the acid group-containing (meth)acrylate resin (1) and the curing agent used in Example 1 were replaced with the compositions and blending amounts shown in Table 1. ) Got.

The following evaluations were performed using the curable resin compositions (1) to (6) and (C1) to (C5) obtained in the above Examples and Comparative Examples.

[Heat resistance evaluation method]
<Preparation of test piece 1>
The curable resin composition obtained in each of Examples and Comparative Examples was applied onto a glass substrate with an applicator having a thickness of 50 μm, and dried at 80° C. for 30 minutes. After irradiating with 1000 mJ/cm< ² > ultraviolet rays using a metal halide lamp, it heated at 160 degreeC for 1 hour. The cured product was peeled off from the copper foil to obtain a test piece 1 (cured product).

The test piece 1 was cut into a size of 6 mm×40 mm, and a viscoelasticity measuring device (DMA: solid viscoelasticity measuring device “RSAII” manufactured by Rheometric Co., tension method: frequency 1 Hz, heating rate 3° C./min) was used. Then, the temperature at which the change in elastic modulus was the maximum (the change rate of tan δ was the largest) was evaluated as the glass transition temperature (Tg).

[Method of measuring elongation]
The elongation was measured based on a tensile test.
<Preparation of test piece 2>
The curable resin composition obtained in each of Examples and Comparative Examples was applied onto a glass substrate with an applicator having a thickness of 50 μm, and dried at 80° C. for 30 minutes. After irradiating with 1000 mJ/cm< ² > ultraviolet rays using a metal halide lamp, it heated at 160 degreeC for 1 hour. The cured product was peeled off from the glass substrate to obtain a test piece 2 (cured product).

<Tensile test>
The test piece 2 was cut into a size of 10 mm×80 mm, and a tensile test of the test piece was performed under the following measurement conditions using a precision universal tester Autograph “AG-IS” manufactured by Shimadzu Corporation. The elongation (%) until the test piece broke was measured and evaluated according to the following criteria.

Measurement conditions: temperature 23°C, humidity 50%, marked line distance 20 mm, fulcrum distance 20 mm, pulling speed 10 mm/min

[Substrate adhesion evaluation method]
The evaluation of the substrate adhesion was performed by measuring the peel strength.

<Creation of test piece 3>
The curable resin compositions obtained in Examples and Comparative Examples were applied on a copper foil (Furukawa Sangyo Co., Ltd., electrolytic copper foil “F2-WS” 18 μm) with an applicator of 50 μm and dried at 80° C. for 30 minutes. It was After irradiating with 1000 mJ/cm< ² > ultraviolet rays using a metal halide lamp, it heated at 160 degreeC for 1 hour, and obtained the test piece 3.

<Peel strength measurement method>
The test piece 3 was cut into a size of 1 cm in width and 12 cm in length, and 90° peel strength was measured using a peeling tester (“A&D Tensilon” manufactured by A&D Co., Ltd., peeling speed 50 mm/min).

The compositions and evaluation results of the curable resin compositions (1) to (6) prepared in Examples 1 to 6 and the curable resin compositions (C1) to (C5) prepared in Comparative Examples 1 to 5 are shown in Table 1. Shown in.

In addition, the "curing agent" in Table 1 shows an ortho-cresol novolac type epoxy resin ("EPICLON N-680" manufactured by DIC Corporation, epoxy equivalent: 214).

"Organic solvent" in Table 1 indicates diethylene glycol monomethyl ether acetate.

"Photoinitiator" in Table 1 indicates "Omnirad-907" manufactured by IGM.

Examples 1 to 6 shown in Table 1 are examples using the curable resin composition of the present invention. It was confirmed that the cured product of this curable resin composition had excellent heat resistance, elongation and substrate adhesion.

On the other hand, Comparative Examples 1 to 4 used curable resin compositions in which the number of moles of epoxy groups contained in the curing agent was outside the range of the present invention per 1 mole of acid groups contained in the acid group-containing (meth)acrylate resin composition. Here is an example. It was confirmed that the cured product of this curable resin composition had remarkably insufficient adhesion to the substrate.

Comparative Example 5 is an example of a curable resin composition using an acid group-containing acrylate resin that does not have the constitution of the present invention. It was confirmed that also in the cured product of this curable resin composition, the substrate adhesion was remarkably insufficient.

Claims (11)

An amide imide resin (A) having an acid group and/or an acid anhydride group, a hydroxyl group-containing (meth)acrylate compound (B), an epoxy group-containing (meth)acrylate compound (C) and a polycarboxylic acid anhydride (D) are essential. An acid group-containing (meth)acrylate resin composition (i) containing an acid group-containing (meth)acrylate resin (E) as a reaction raw material of
A curing agent (ii) containing an epoxy resin,
A curable resin composition comprising:
The number of moles of epoxy groups contained in the curing agent (ii) is 1 to 1 mole of the acid groups contained in the acid group-containing (meth)acrylate resin composition (i), and is in the range of 0.7 to 1.7. And a curable resin composition. The curable resin composition according to claim 1, wherein the amide-imide resin (A) contains the polyisocyanate compound (a1) and the polycarboxylic acid anhydride (a2) as essential reaction raw materials. The curable resin composition according to claim 2, wherein the polyisocyanate compound (a1) is an aliphatic diisocyanate, an alicyclic diisocyanate, or a modified product thereof. The curable resin composition according to claim 1, wherein the polycarboxylic acid anhydride (D) is an aliphatic polycarboxylic acid anhydride and/or an alicyclic polycarboxylic acid anhydride. The curable resin composition according to claim 1, further comprising a photopolymerization initiator. The curable resin composition according to claim 1, further comprising an organic solvent. The acid group-containing (meth)acrylate resin composition (i) further contains a resin (F) having an acid group and a polymerizable unsaturated bond other than the acid group-containing (meth)acrylate resin (E). The curable resin composition according to claim 1, which is A cured product, which is a cured reaction product of the curable resin composition according to any one of claims 1 to 7. An insulating material comprising the curable resin composition according to claim 1. A resin material for a solder resist, comprising the curable resin composition according to claim 1. A resist member comprising the resin material for solder resist according to claim 10.