JP2018168264A - Curable resin composition and application of the same - Google Patents

Abstract

To provide a curable resin composition which can stably exhibit various physical properties such as curability and solvent resistance after curing, adhesion with a substrate (base material), heat resistance and transparency, is excellent in storage stability, and is useful for various applications such as a color filter; a cured product formed from the curable resin composition; and a color filter and a display device using the cured product.SOLUTION: A curable resin composition contains a (meth)acrylate polymer, a polymerizable compound and a photopolymerization initiator, where the (meth)acrylate polymer contains 2-30 mass% of an N-alkylmaleimide monomer and/or an N-cyclo alkylmaleimide monomer unit, 20-60 mass% of a tertiary carbon-containing (meth)acrylate monomer unit, 10-40 mass% of a monomer unit having a hydroxyl group, and 5-25 mass% of a (meth)acrylic acid unit.SELECTED DRAWING: None

Description

  The present invention relates to a curable resin composition and its use. More specifically, it is useful for various applications such as various optical members and electrical / electronic devices such as color filters, inks, printing plates, printed wiring boards, semiconductor elements, and photoresists used in liquid crystal display devices and solid-state imaging devices. The present invention relates to a curable resin composition, a cured product thereof, a color filter using the cured product, and a display device.

  Curable resin compositions that can be cured by heat or active energy rays include, for example, color filters, inks, printing plates, printed wiring boards, semiconductor elements, and photoresists used in liquid crystal display devices and solid-state imaging devices. Various applications for various uses such as optical members and electrical / electronic devices have been studied, and curable resin compositions having excellent characteristics required for each use have been developed. Among these applications, the color filter is a main member constituting a liquid crystal display device, a solid-state image sensor, and the like, and is generally a substrate and at least three primary colors (red (R), green (G), and blue (B)). And a protective film provided to cover and protect the pixel and the resin black matrix and to flatten the unevenness thereof, in addition to the pixel and the resin black matrix (BM) for separating them. .

  In general, when forming a pixel of a color filter using a curable resin composition, (1) an application process for applying the curable resin composition to the entire surface of the substrate and (2) an application process for each pixel color. The resist film is subjected to pattern exposure through a photomask and the exposed portion is cured, and then the exposed portion is insolubilized, and (3) the unexposed portion is removed with a developer and then baked (baked). A developing and baking (baking) treatment process for further curing the exposed portion is performed, and the same process is repeated for each color. In consideration of application to such color filter applications, the curable resin composition has various physical properties such as curability, solvent resistance after curing, adhesion to a substrate (base material), heat resistance and transparency. It is required to have. In recent years, optical members, electric devices, electronic devices, and the like are becoming smaller, thinner, and energy-saving, and accordingly, members such as color filters that are used are required to have high-quality performance.

  Regarding conventional curable resin compositions, examples of compositions suitable for color filter applications include N-benzylmaleimide monomer units, tertiary carbon-containing (meth) acrylate monomer units, and monomers containing hydroxyl groups. A photosensitive resin composition containing a polymerizable compound, a photopolymerization initiator, and a solvent when having a unit and acrylic acid is disclosed (see Patent Document 1).

JP2015-157909A

  As described above, the curable resin composition is required to have various physical properties such as curability, solvent resistance after curing, adhesion to a substrate (also referred to as a base material), heat resistance, and transparency. ing. In recent years, with the advancement of technologies for display devices and the like, there has been a strong demand for higher performance for each member used. For example, for color filter applications, heat treatment in the manufacturing process There is a problem that the coloring material is eluted in the cleaning solvent in the manufacturing process as the luminance decreases due to the thermal coloring of the coating film due to the color and the concentration of the coloring material such as a pigment or dye increases. Therefore, very high solvent resistance is required after curing. However, in the current situation, conventional resin compositions cannot sufficiently meet these demands. For example, although the resin composition described in Patent Document 1 is satisfactory in terms of solvent resistance, there is room for improvement such as reduction in heat resistant colorability, particularly heat resistant colorability at high temperatures.

  The present invention has been made in view of the above situation, and can stably exhibit various physical properties such as curability, solvent resistance after curing, adhesion to a substrate (base material), heat resistance and transparency. An object of the present invention is to provide a curable resin composition that is excellent in storage stability and useful for various uses such as a color filter. Another object of the present invention is to provide a cured product formed from such a curable resin composition, and a color filter and a display device using the cured product.

  The present inventor has made various studies on curable resin compositions useful for various uses such as color filters. When the resin composition includes a (meth) acrylate polymer, a polymerizable compound, and a photopolymerization initiator, the composition is cured. We paid attention to the fact that it would have sex. The (meth) acrylate polymer is a N-alkylmaleimide and / or N-cycloalkylmaleimide monomer unit, a structural unit derived from a tertiary carbon-containing (meth) acrylate monomer, and a (meth) acrylic acid unit. By having monomer units having a hydroxyl group at a specific ratio, the solvent resistance after curing is drastically improved, high transparency, adhesion to the substrate (base material), and heat resistance. The present inventors have found that a cured product that can stably develop various physical properties such as high hardness can be obtained. In addition, the development time at the time of alkali development can be shortened, and the productivity can be further improved and the manufacturing cost can be reduced. Such a curable resin composition is particularly useful for color filter applications, and is particularly suitable as a resin composition for forming pixels for color filters. Therefore, a cured product, a color filter and a display device formed from such a curable resin composition are extremely useful in the optical field, electrical machinery / electronics field, etc., as they can sufficiently meet the demand for higher performance in recent years. As a result, the inventors have arrived at the present invention by conceiving that the above problems can be solved brilliantly.

  Here, the (meth) acrylate polymer contained in the curable resin composition of the present invention has a structural unit derived from a tertiary carbon-containing (meth) acrylate monomer, but the structural unit is decomposed by heat. Easy to be. Specifically, the O—C bond between the oxygen atom adjacent to the (meth) acryloyl group and the tertiary carbon atom adjacent to the oxygen atom is easily cleaved, whereby (meth) acrylic acid and third It is decomposed into a stable compound generated on the secondary carbon atom side. Therefore, for example, when the curable resin composition of the present invention is used for forming a pixel of a color filter, the above-described tertiary carbon-containing (metathesis) is obtained by a heating process after development (also referred to as a baking process or a post-baking process). ) The structural unit derived from the acrylate monomer is decomposed to produce (meth) acrylic acid and a stable compound generated on the tertiary carbon atom side. Then, due to the formation of an ester cross-linked structure between the hydroxyl group and ester group in the polymer and the generated (meth) acrylic acid, the curability of the resin composition and the solvent resistance after curing have jumped. This is thought to be improved.

  Further, N-substituted maleimide monomers are characterized by excellent pigment dispersibility, heat distortion, and thermal decomposability, but N-benzylmaleimide and the like used in Patent Document 1 have an aromatic hydrocarbon structure. In addition, there was a disadvantage that the heat resistant colorability at high temperatures was poor. In particular, post-baking and thermal coloring in the subsequent heat treatment process cause a decrease in luminance, yellowing, and the like. These have become a problem when used for color filter pixels, overcoats, interlayer insulating films, etc., as the quality of liquid crystal panels is increased. The present inventors have changed the substituent of maleimide to an alkyl group or a cycloalkyl group instead of a substituent containing an aromatic hydrocarbon structure such as a benzyl group or a phenyl group, particularly at a high temperature region of 250 ° C. The present inventors have found that the thermal coloring of can be greatly suppressed, and completed the present invention.

That is, the present invention includes the following <1> to <7>.
<1> A curable resin composition comprising a (meth) acrylate polymer, a polymerizable compound and a photopolymerization initiator,
The (meth) acrylate polymer is an N-alkylmaleimide monomer and / or N-cycloalkylmaleimide monomer unit of 2 to 30% by mass, and a tertiary carbon-containing (meth) acrylate monomer unit of 20 to 20%. A curable resin composition comprising 60% by mass, 10 to 40% by mass of a monomer unit having a hydroxyl group, and 5 to 25% by mass of a (meth) acrylic acid unit.
<2> The tertiary carbon-containing (meth) acrylate monomer unit has a structure in which an oxygen atom adjacent to a (meth) acryloyl group is bonded to a tertiary carbon atom. <1> The curable resin composition described.
<3> The curing according to <1> or <2>, wherein the (meth) acrylate polymer has a content of monomer units containing an aromatic hydrocarbon structure of 5% by mass or less. Resin composition.
<4> The curable resin composition according to any one of <1> to <3>, wherein the N-cycloalkylmaleimide monomer unit is a structural unit derived from N-cyclohexylmaleimide.
<5> A cured product obtained by curing the curable resin composition according to any one of <1> to <4>.
<6> A color filter comprising the cured product according to <5> on a substrate.
<7> A display device comprising the color filter according to <6>.

  Since the curable resin composition of the present invention is configured as described above, it has good developability, curability, solvent resistance after curing, adhesion to a substrate (base material), heat resistance, and transparency. It is possible to stably exhibit various physical properties such as properties, excellent storage stability, and useful for various uses such as a color filter. Therefore, a color filter and a display device having a cured product (cured film) formed from such a curable resin composition are very useful in the optical field, the electric machine / electronic field, and the like.

The present invention is described in detail below. In addition, the form which combined each preferable form of this invention described below 2 or 3 or more is also a preferable form of this invention.
[Curable resin composition]
Although the curable resin composition of this invention contains a (meth) acrylate type polymer, a polymeric compound, and a photoinitiator, these 1 type or 2 types or more can be used for these containing components, respectively. Further, if necessary, one or more other components may be further contained.
<(Meth) acrylate polymer>
In the curable resin composition, the (meth) acrylate polymer contains 2 to 30% by mass of N-alkylmaleimide and / or N-cycloalkylmaleimide monomer units with respect to 100% by mass of all the structural units. It is preferable. By having an N-alkylmaleimide and / or N-cycloalkylmaleimide monomer unit derived from an N-substituted maleimide monomer, it has excellent heat resistance, heat distortion resistance, alkali developability, pigment dispersion And solvent resistance can be exhibited. Specific examples of the alkyl group of the N-alkylmaleimide monomer include C = 1-20 chains such as methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, 2-ethylhexyl group, and lauryl group. An alkyl group is preferred. Further, the N-cycloalkyl group is preferably a cycloalkyl group such as a cyclohexyl group, a cyclopentyl group, a dicyclopentanyl group, a dicyclopentenyl group, or a tricyclodecanyl group. Among these, N-cyclohexylmaleimide is most preferable because it is easily available industrially, has relatively high safety such as skin irritation, and is excellent in handleability.
The copolymerization ratio of the N-alkylmaleimide and / or N-cycloalkylmaleimide monomer is preferably in the range of 2 to 30% by mass with respect to 100% by mass of the total amount of monomer components. If it is less than 2% by mass, the heat resistance, solvent resistance and pigment dispersibility may be reduced. Moreover, when it exceeds 30 mass%, there exists a possibility that alkali developability may fall or heat-resistant coloring property may fall. More preferably, it is 5-30 mass%, More preferably, it is 5-20 mass%.

In particular, in order to achieve the above-mentioned effect remarkably, 90 parts by mass of N-cyclohexylmaleimide with respect to 100 parts by mass of N-substituted maleimide monomer (N-alkylmaleimide and / or N-cycloalkylmaleimide monomer) Above, preferably 95 parts by mass or more, and most preferably 100 parts by mass is used.
The (meth) acrylate polymer also contains a structural unit derived from a tertiary carbon-containing (meth) acrylate monomer in the range of 20 to 60% by mass with respect to 100% by mass of the total amount of monomer components. It is necessary to. A structural unit derived from a tertiary carbon-containing (meth) acrylate monomer is a structure in which a polymerizable carbon-carbon double bond (C═C) in the monomer is a single bond (C—C). Although it means a unit, the monomer preferably has a structure in which an oxygen atom adjacent to a (meth) acryloyl group is bonded to a tertiary carbon atom. That is, the tertiary carbon-containing (meth) acrylate-based monomer preferably has a structure in which an oxygen atom adjacent to the (meth) acryloyl group is bonded to a tertiary carbon atom. The tertiary carbon atom means a carbon atom having three other carbon atoms bonded to the carbon atom.

The tertiary carbon-containing (meth) acrylate monomer is a compound having one polymerizable carbon-carbon double bond in the molecule, that is, a (meth) acryloyl group (CH ₂ = C (R) in the molecule. A compound having one -C (= O)-) is preferable, and for example, the following general formula (1):
_{CH 2 = C (R) -C} (= O) -O-A (1)
(R represents a hydrogen atom or a methyl group. A represents a monovalent organic group containing a structure having a tertiary carbon atom on the oxygen atom side).

In the general formula (1), the organic group represented by A can be represented by, for example, —C (R ¹ ) (R ² ) (R ³ ). In this case, R ¹ , R ² and R ³ are the same or different and are preferably a hydrocarbon group having 1 to 30 carbon atoms, and the hydrocarbon group may be a saturated hydrocarbon group. And may be an unsaturated hydrocarbon group. Moreover, it may have a cyclic structure and may further have a substituent. R ¹ , R ^2, and R ³ may be linked to each other at a terminal site to form a cyclic structure.
In the present invention, as will be described later, a new O-C bond formed between the oxygen atom adjacent to the (meth) acryloyl group and the tertiary carbon atom in A adjacent thereto is cleaved. The number of carbon atoms of the organic group represented by A is preferably 12 or less in that the compound is easily volatilized. Among them, the organic group represented by A is preferably a group derived from t-butyl (meth) acrylate and / or t-amyl (meth) acrylate. The organic group represented by A may have a branched structure.

Here, in the tertiary carbon-containing (meth) acrylate monomer, the tertiary carbon atom bonded to the oxygen atom adjacent to the (meth) acryloyl group is bonded to a hydrogen atom at least one of the adjacent carbon atoms. It is preferred that For example, a tertiary carbon-containing (meth) acrylate monomer is a compound represented by the above general formula (1), and A is represented by -C (R ¹ ) (R ² ) (R ³ ). It is preferable that at least one of R ¹ , R ² and R ³ contains a carbon atom having one or more hydrogen atoms, and the carbon atom is bonded to a tertiary carbon atom. In such a form, by heating, the O—C bond between the oxygen atom adjacent to the (meth) acryloyl group and the tertiary carbon atom adjacent thereto is cut, and (meth) acrylic acid is generated at the same time. Then, a double bond (C═C) is formed between the tertiary carbon atom and the carbon atom adjacent to the tertiary carbon atom, and a new compound is generated more stably.

The new compound produced as described above is preferably volatile. In this case, the film thickness of the cured product (cured film) is reduced due to volatilization of the new compound from the cured product, and at the same time, for example, the curable resin composition further includes a color material. In some cases, the colorant concentration increases after heating. Therefore, it is possible to realize a further thinner film, and to achieve higher color purity and higher light blocking ratio of the black matrix. In view of this point, R ¹ , R ² and R ³ are preferably the same or different and are each a saturated hydrocarbon group having 1 to 15 carbon atoms. More preferably, it is a C1-C10 saturated hydrocarbon group, More preferably, it is a C1-C5 saturated hydrocarbon group, Most preferably, it is a C1-C3 saturated hydrocarbon group.

  It is preferable that the content rate of said tertiary carbon containing (meth) acrylate type monomer unit is 20-60 mass% with respect to 100 mass% of total amounts of a monomer component. Thereby, the effect of this invention resulting from the structural unit derived from a tertiary carbon containing (meth) acrylate type monomer will be expressed further. More preferably, it is 25-55 mass%, Most preferably, it is 30-50 mass%. When the content ratio of the tertiary carbon-containing (meth) acrylate monomer unit is less than the above range, the solvent resistance is lowered. Moreover, when it exceeds the said range, there exists a possibility that solvent resistance may fall or alkali developability may fall.

  The (meth) acrylate polymer preferably contains 5 to 25% by mass of (meth) acrylic acid units with respect to 100% by mass of the total amount of monomer components. The acid value (AV) of the polymer is preferably 40 to 200 mgKOH / g. More preferably, it is 60-180 mgKOH / g. Thereby, more sufficient alkali solubility is expressed, and it becomes possible to obtain a cured product having better developability. If the content ratio of the (meth) acrylic acid is below the above range, the solvent resistance and alkali developability may be lowered. Moreover, when it exceeds the said range, alkali solubility becomes high too much, and there exists a possibility that the adhesiveness with respect to a board | substrate and heat resistance may become too high. Moreover, there exists a possibility that the solubility with respect to an organic solvent may fall, or a viscosity may raise remarkably. In the present invention, the monomer unit such as (meth) acrylic acid means a structural unit derived from the monomer, and for example, the acrylic acid unit is acrylic acid obtained by copolymerization or graft polymerization of acrylic acid. It means the structural unit derived from. In addition, the above (meth) acrylic acid can be used for unsaturated monocarboxylic acids such as crotonic acid, cinnamic acid, and vinyl benzoic acid, and unsaturated polycarboxylic acids such as maleic acid, fumaric acid, itaconic acid, citraconic acid, and mesaconic acid. The same effect can be obtained even if all or part of the circuit is replaced.

The (meth) acrylate polymer preferably also contains 5 to 40 mass of monomer units having a hydroxyl group (hydroxyl group) in the molecule, with the total amount of all monomers being 100%. Thereby, the sclerosis | hardenability of curable resin composition is improved more, and the hardened | cured material which is more excellent by solvent resistance and transparency can be given. Examples of the monomer having a hydroxyl group in the molecule include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, and 2-hydroxy (meth) acrylate. Preferred examples include hydroxyalkyl (meth) acrylates such as butyl, 3-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 2,3-dihydroxypropyl (meth) acrylate.
The content ratio of the monomer unit having a hydroxyl group is preferably 5 to 40% by mass, more preferably 10 to 35% by mass, and still more preferably 15% with respect to 100% by mass of the total amount of the monomer components. -30 mass%. When the content ratio of the monomer unit having a hydroxyl group is less than the above range, the curability becomes insufficient and the solvent resistance may be lowered. On the other hand, if it exceeds the above range, the hydrophilicity becomes too strong, and there is a risk of peeling during development or roughening of the surface and whitening.

The (meth) acrylate-based polymer includes, for example, an N-alkylmaleimide and / or N-cycloalkylmaleimide monomer, a tertiary carbon-containing (meth) acrylate-based monomer, an acrylic acid monomer, and a hydroxyl group. It can be obtained by polymerizing a monomer component containing the monomer component it has.
In addition, each monomer used can use 1 type (s) or 2 or more types, respectively.

The polymer of the present invention may also have a (meth) acrylic acid ester monomer and other copolymerizable monomer units in order to adjust developability, solvent solubility and the like.
As the (meth) acrylic acid ester monomer, for example, a monomer having an alicyclic skeleton is preferable in consideration of the surface hardness of the cured product. Specifically, for example, cyclohexyl (meth) acrylate, cyclohexylmethyl (meth) acrylate, isobornyl (meth) acrylate, 1-adamantyl (meth) acrylate, (3,4-epoxycyclohexyl) methyl (meth) acrylate, dicyclo Pentenyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, tricyclodecanyl (meth) acrylate, dimethylol-tricyclodecanedi (meth) acrylate, pentacyclopentadecanedimethanol rudi (meth) acrylate, cyclohexanedimethanol Di (meth) acrylate, norbornane dimethanol di (meth) acrylate, p-menthane-1,8-diol di (meth) acrylate, p-menthane-2,8-diol di ( ) Acrylate, p-menthane-3,8-diol di (meth) acrylate, bicyclo [2.2.2] -octane-1-methyl-4-isopropyl-5,6-dimethylol di (meth) acrylate, and the like. . Among these, it is preferable to use cyclohexyl (meth) acrylate, cyclohexylmethyl (meth) acrylate, isobornyl (meth) acrylate, and tricyclodecanyl (meth) acrylate from the viewpoints of versatility and availability. It is also preferable to use an alicyclic epoxy compound such as glycidyl (meth) acrylate, methyl glycidyl (meth) acrylate, or ethyl glycidyl (meth) acrylate.

  Examples of the (meth) acrylic acid ester monomer include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, (meth ) N-butyl acrylate, s-butyl (meth) acrylate, n-amyl (meth) acrylate, s-amyl (meth) acrylate, n-hexyl (meth) acrylate, 2- (meth) acrylic acid 2- Ethylhexyl, isodecyl (meth) acrylate, tridecyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, benzyl (meth) acrylate , (Meth) acrylic acid phenyl, (meth) acrylic acid 2-methoxyethyl, (meth) acrylic acid 2-ethoxyethyl , Phenoxyethyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, methyl α-hydroxymethyl acrylate, ethyl α-hydroxymethyl acrylate, α-hydroxy 1,4-dioxaspiro [4,5] dec-2-ylmethacrylic acid, (meth) acryloylmorpholine, tetrahydrofurfuryl acrylate, in addition to t-butyl methyl acrylate, t-amyl α-hydroxymethyl acrylate, etc. 4- (meth) acryloyloxymethyl-2-methyl-2-ethyl-1,3-dioxolane, 4- (meth) acryloyloxymethyl-2-methyl-2-isobutyl-1,3-dioxolane, 4- (meth) ) Acrylyloxymethyl-2-methyl-2-cyclohexyl-1 , 3-dioxolane, 4- (meth) acryloyloxymethyl-2,2-dimethyl-1,3-dioxolane, and the like. Among them, alkyl (meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, and butyl (meth) acrylate are easy to balance heat resistance, colorant dispersibility, and solvent resolubility. Is preferred.

The other copolymerizable monomer may also be, for example, one or more of the following compounds.
(Meth) acrylamides such as N, N-dimethyl (meth) acrylamide and N-methylol (meth) acrylamide; heavy materials such as polystyrene, polymethyl (meth) acrylate, polyethylene oxide, polypropylene oxide, polysiloxane, polycaprolactone and polycaprolactam Macromonomers having a (meth) acryloyl group at one end of the combined molecular chain; conjugated dienes such as 1,3-butadiene, isoprene and chloroprene; vinyl esters such as vinyl acetate, vinyl propionate, vinyl butyrate and vinyl benzoate Class: methyl vinyl ether, ethyl vinyl ether, propyl vinyl ether, butyl vinyl ether, 2-ethylhexyl vinyl ether, n-nonyl vinyl ether, lauryl vinyl ether, cyclohexyl vinyl ether , Methoxyethyl vinyl ether, ethoxyethyl vinyl ether, methoxyethoxyethyl vinyl ether, methoxypolyethylene glycol vinyl ether, 2-hydroxyethyl vinyl ether, 4-hydroxybutyl vinyl ether and other vinyl ethers; N-vinylpyrrolidone, N-vinylcaprolactam, N-vinylimidazole N-vinyl compounds such as N-vinylmorpholine and N-vinylacetamide; Unsaturated isocyanates such as isocyanatoethyl (meth) acrylate and allyl isocyanate; N-phenylmaleimide and N-benzylmaleimide Aromatic substituted maleimides; aromatic vinyl compounds such as styrene, α-methylstyrene and vinyltoluene; 2,2 ′-[oxybis (methylene)] bisacrylic acid, Dialkyl-2,2 ′-(oxydimethylene) such as alkyl-2,2 ′-[oxybis (methylene)] bis-2-propenoate, dialkyl-2,2 ′-[oxybis (methylene)] bis-2-propenoate ) Diacrylate monomers; α-allyloxymethylacrylic acid, α-allyloxymethyl acrylate methyl, α-allyloxymethyl acrylate ethyl, α-allyloxymethyl acrylate n-propyl, α-allyloxy I-propyl methyl acrylate, n-butyl α-allyloxymethyl acrylate, s-butyl α-allyloxymethyl acrylate, t-butyl α-allyloxymethyl acrylate, n-amyl α-allyloxymethyl acrylate , Α-allyloxymethyl acrylate s-amyl, α-allyloxymethyl acrylate t Amyl, alpha-allyloxymethylacrylate neopentyl, etc. alpha-(unsaturated alkoxyalkyl) acrylate monomers, and the like.

  Among the above copolymerizable monomers, it has been found that a monomer having an aromatic hydrocarbon group decreases the heat-resistant coloring property and causes strong coloring by heating at a high temperature. Therefore, the content of the monomer having an aromatic hydrocarbon group is preferably less than 5% by mass with respect to 100% by mass of the total amount of all monomers, preferably less than 3%, and most preferably not substantially contained. .

  As a method for polymerizing the monomer component, a commonly used technique such as bulk polymerization, solution polymerization, emulsion polymerization or the like can be used, and it may be appropriately selected according to the purpose and application. Among these, solution polymerization is preferred because it is industrially advantageous and structural adjustments such as molecular weight are easy. The polymerization mechanism of the monomer component may be a polymerization method based on a mechanism such as radical polymerization, anionic polymerization, cationic polymerization, or coordination polymerization, but the polymerization method based on the radical polymerization mechanism is industrial. Is also preferable.

  As a blending ratio (% by mass) at the time of polymerization, N-alkylmaleimide and / or N-cycloalkylmaleimide monomer, tertiary carbon-containing (meth) acrylate monomer, hydroxyl group-containing monomer, (meta ) When polymerizing monomer components including acrylic acid and other (meth) acrylic acid ester monomers, N-alkylmaleimide and / or N-cycloalkylmaleimide monomers (2 to 30% by mass), Tertiary carbon-containing (meth) acrylate monomer (20 to 60% by mass), monomer having a hydroxyl group (10 to 40% by mass), and (meth) acrylic acid (5 to 25% by mass), (meta ) A blending ratio of acrylic acid ester monomer (1 to 50% by mass) is preferable.

The polymerization initiation method in the above polymerization reaction may be performed by supplying energy necessary for initiation of polymerization to the monomer component from an active energy source such as heat, electromagnetic waves (for example, infrared rays, ultraviolet rays, X-rays, etc.), electron beams, and the like. If an initiator is used in combination, the energy required for initiating polymerization can be greatly reduced, and reaction control is facilitated, which is preferable.
The molecular weight of the polymer obtained by polymerizing the monomer components can be controlled by adjusting the amount and type of the polymerization initiator, the polymerization temperature, the type and amount of the chain transfer agent, and the like.

  When the monomer component is polymerized by the solution polymerization method, the solvent used for the polymerization is not particularly limited as long as it is inert to the polymerization reaction. For example, it may be appropriately set according to the polymerization conditions such as the polymerization mechanism, the type and amount of the monomer to be used, the polymerization temperature, the polymerization concentration and the like. When is used, it is efficient and preferable to use a solvent containing the solvent for solution polymerization of the monomer component.

As said solvent, the following compound etc. are mentioned suitably, for example, These 1 type (s) or 2 or more types can be used.
Monoalcohols such as methanol, ethanol, isopropanol, n-butanol, s-butanol; glycols such as ethylene glycol and propylene glycol; cyclic ethers such as tetrahydrofuran and dioxane; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene Glycol monoethers such as 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 and 3-methoxybutanol; Ethylene glycol Glycol ethers such as dimethyl ether, ethylene glycol diethyl ether, ethylene glycol ethyl methyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol ethyl methyl ether, propylene glycol dimethyl ether, propylene glycol diethyl ether; ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether Acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene Glycol monoether esters such as glycol monoethyl ether acetate, propylene glycol monobutyl ether acetate, dipropylene glycol monomethyl ether acetate, dipropylene glycol monoethyl ether acetate, dipropylene glycol monobutyl ether acetate, 3-methoxybutyl acetate; methyl acetate , Ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, methyl propionate, ethyl propionate, butyl propionate, methyl lactate, ethyl lactate, butyl lactate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, 3- Alkyl esters such as methyl ethoxypropionate, ethyl 3-ethoxypropionate, methyl acetoacetate and ethyl acetoacetate; Ketones such as seton, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; aromatic hydrocarbons such as benzene, toluene, xylene, and ethylbenzene; aliphatic hydrocarbons such as hexane, cyclohexane, and octane; dimethylformamide, dimethylacetamide, N- Amides such as methyl pyrrolidone;

  Among these solvents, propylene glycol monomethyl ether, propylene are used because of the solubility of the resulting polymer, surface smoothness when forming a coating film, little influence on the human body and the environment, and industrial availability. It is more preferable to use glycol monopropyl ether, propylene glycol monomethyl ether acetate, diethylene glycol dimethyl ether, diethylene glycol ethyl methyl ether, or ethyl lactate.

  As the usage-amount of the said solvent, it is suitable that it is 50-1000 mass parts with respect to 100 mass parts of said monomer components. More preferably, it is 100-500 mass parts.

  When the monomer component is polymerized by a radical polymerization mechanism, it is industrially advantageous and preferable to use a polymerization initiator that generates radicals by heat. Such a polymerization initiator is not particularly limited as long as it generates radicals by supplying thermal energy. Depending on the polymerization conditions such as polymerization temperature, solvent, type of monomer to be polymerized, etc. And may be selected as appropriate. Moreover, you may use together reducing agents, such as transition metal salt and amines, with a polymerization initiator.

  Examples of the polymerization initiator include cumene hydroperoxide, diisopropylbenzene hydroperoxide, di-t-butyl peroxide, lauroyl peroxide, benzoyl peroxide, t-butylperoxyisopropyl carbonate, and t-butylperoxy- 2-ethylhexanoate, t-amylperoxy-2-ethylhexanoate, azobisisobutyronitrile, 1,1′-azobis (cyclohexanecarbonitrile), 2,2′-azobis (2,4- Dimethyl valeronitrile), dimethyl 2,2′-azobis (2-methylpropionate), hydrogen peroxide, persulfate, and other peroxides and azo compounds that are usually used as polymerization initiators. May be used alone or in combination of two or more.

  The amount of the polymerization initiator used may be appropriately set according to the type and amount of the monomer used, the polymerization conditions such as the polymerization temperature and the polymerization concentration, the molecular weight of the target polymer, etc., and is particularly limited. It is not a thing. For example, in order to obtain a polymer having a weight average molecular weight of several thousand to several tens of thousands, the content is preferably 0.1 to 20 parts by mass with respect to 100 parts by mass of the monomer component. More preferably, it is 0.5-15 mass parts.

  In the above polymerization, a chain transfer agent usually used may be used as necessary. Preferably, a polymerization initiator and a chain transfer agent are used in combination. In addition, when a chain transfer agent is used at the time of superposition | polymerization, it exists in the tendency which can suppress the increase in molecular weight distribution or gelatinization.

  Examples of the chain transfer agent include mercaptocarboxylic acids such as mercaptoacetic acid and 3-mercaptopropionic acid; methyl mercaptoacetate, methyl 3-mercaptopropionate, 2-ethylhexyl 3-mercaptopropionate, and n-mercaptopropionic acid n- Octyl, methoxybutyl 3-mercaptopropionate, stearyl 3-mercaptopropionate, trimethylolpropane tris (3-mercaptopropionate), pentaerythritol tetrakis (3-mercaptopropionate), dipentaerythritol hexakis (3- Mercaptocarboxylic esters such as mercaptopropionate); alkyl mercapts such as ethyl mercaptan, t-butyl mercaptan, n-dodecyl mercaptan, 1,2-dimercaptoethane Mercapto alcohols such as 2-mercaptoethanol and 4-mercapto-1-butanol; Aromatic mercaptans such as benzenethiol, m-toluenethiol, p-toluenethiol and 2-naphthalenethiol; Tris [(3- Mercaptoisocyanurates such as mercaptopropionyloxy) -ethyl] isocyanurate; disulfides such as 2-hydroxyethyl disulfide and tetraethylthiuram disulfide; dithiocarbamates such as benzyldiethyldithiocarbamate; single quantities such as α-methylstyrene dimer Body dimers; alkyl halides such as carbon tetrabromide. These may be used alone or in combination of two or more.

  Among these, mercaptocarboxylic acids, mercaptocarboxylic esters, alkyl mercaptans, mercapto alcohols, aromatic mercaptans, mercaptoisocyanurates, in terms of availability, ability to prevent crosslinking, and low degree of polymerization rate reduction. It is preferable to use a compound having a mercapto group such as More preferred are alkyl mercaptans, mercaptocarboxylic acids, mercaptocarboxylic acid esters, and still more preferred are n-dodecyl mercaptan and mercaptopropionic acid.

  The amount of the chain transfer agent used is not particularly limited as long as it is appropriately set according to the type and amount of the monomer used, the polymerization conditions such as the polymerization temperature and the polymerization concentration, the molecular weight of the target polymer, and the like. For example, in order to obtain a polymer having a weight average molecular weight of several thousand to several tens of thousands, the content is preferably 0.1 to 20 parts by mass with respect to 100 parts by mass of the monomer component. More preferably, it is 0.5-15 mass%.

  Regarding the polymerization conditions, the polymerization temperature may be appropriately set according to the type and amount of the monomer to be used, the type and amount of the polymerization initiator, and is preferably 50 to 150 ° C, for example, 70 to 120 ° C. is more preferable. Further, the polymerization time can be appropriately set similarly, but for example, 1 to 6 hours is preferable, and 2 to 5 hours is more preferable.

The (meth) acrylate polymer preferably has a weight average molecular weight of 3000 to 50,000. By being in such a range, it becomes possible to exhibit better developability. More preferably, it is 8000 to 40,000, More preferably, it is 10,000 to 30,000. When the weight average molecular weight is below the above range, the solvent resistance may be lowered. On the other hand, if it exceeds the above range, the developing speed may be reduced.
The weight average molecular weight of a polymer can be calculated | required like the Example mentioned later, for example.

In the curable resin composition, the content ratio of the (meth) acrylate-based polymer may be appropriately set according to the use and the blending of other components. For example, the total solid content thereof is curable. It is preferable that it is 5 mass% or more with respect to 100 mass% of solid content total amount of a resin composition. Moreover, it is suitable that it is 80 mass% or less. By being in such a range, it becomes possible to show the effect of the present invention more remarkably. More preferably, it is 7-70 mass%, More preferably, it is 10-60 mass%.
The “total amount of solids” means the total amount of components that form a cured product (excluding solvents that volatilize during the formation of the cured product).
<Polymerizable compound>
The curable resin composition also contains a polymerizable compound. The polymerizable compound is also referred to as a polymerizable monomer, and can be polymerized by irradiation with active radicals such as free radicals, electromagnetic waves (for example, infrared rays, ultraviolet rays, X-rays), electron beams, etc. A low molecular compound having a polymerizable unsaturated group). For example, the monofunctional compound which has one polymerizable unsaturated group in a molecule | numerator, and the polyfunctional compound which has 2 or more are mentioned.
Examples of the monofunctional polymerizable monomer include, for example, N-substituted maleimide and (meta) among the compounds exemplified as other monomers preferably contained in the monomer component of the (meth) acrylate polymer. ) Acrylic esters; (Meth) acrylamides; Unsaturated monocarboxylic acids; Unsaturated polycarboxylic acids; Unsaturated monocarboxylic acids in which the chain between the unsaturated group and the carboxyl group is extended; Unsaturated acid anhydride Aromatic vinyls, conjugated dienes, vinyl esters, vinyl ethers, N-vinyl compounds, unsaturated isocyanates, and the like.

Examples of the polyfunctional polymerizable monomer include the following compounds.
Ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, butylene glycol di (meth) acrylate, hexanediol di (meth) acrylate, cyclohexanedimethanol Bifunctional (meth) acrylate compounds such as di (meth) acrylate, bisphenol A alkylene oxide di (meth) acrylate, bisphenol F alkylene oxide di (meth) acrylate;
Trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, glycerol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, Dipentaerythritol hexa (meth) acrylate, tripentaerythritol hepta (meth) acrylate, tripentaerythritol octa (meth) acrylate, ethylene oxide-added trimethylolpropane tri (meth) acrylate, ethylene oxide-added ditrimethylolpropane tetra (meth) acrylate, ethylene oxide Addition pentaerythritol tetra (meth) acrylate, ethylene oxide addition dipe Taerythritol hexa (meth) acrylate, propylene oxide-added trimethylolpropane tri (meth) acrylate, propylene oxide-added ditrimethylolpropane tetra (meth) acrylate, propylene oxide-added pentaerythritol tetra (meth) acrylate, propylene oxide-added dipentaerythritol hexa (Meth) acrylate, ε-caprolactone-added trimethylolpropane tri (meth) acrylate, ε-caprolactone-added ditrimethylolpropane tetra (meth) acrylate, ε-caprolactone-added pentaerythritol tetra (meth) acrylate, ε-caprolactone-added dipentaerythritol Trifunctional or higher polyfunctional (meth) acrylate compounds such as hexa (meth) acrylate;
Ethylene glycol divinyl ether, diethylene glycol divinyl ether, polyethylene glycol divinyl ether, propylene glycol divinyl ether, butylene glycol divinyl ether, hexanediol divinyl ether, bisphenol A alkylene oxide divinyl ether, bisphenol F alkylene oxide divinyl ether, trimethylolpropane trivinyl ether, ditrile Methylolpropane tetravinyl ether, glycerin trivinyl ether, pentaerythritol tetravinyl ether, dipentaerythritol pentavinyl ether, dipentaerythritol hexavinyl ether, ethylene oxide-added trimethylolpropane trivinyl ether, ethylene oxide-added ditrimethyl Lumpur propane tetravinyl ether, ethylene oxide adduct of pentaerythritol tetravinyl ether, polyfunctional vinyl ethers such as ethylene oxide adduct of dipentaerythritol hexavinyl ether;
(Meth) acrylic acid 2-vinyloxyethyl, (meth) acrylic acid 3-vinyloxypropyl, (meth) acrylic acid 1-methyl-2-vinyloxyethyl, (meth) acrylic acid 2-vinyloxypropyl, (meth) acrylic acid 4 -Vinyloxybutyl, 4-vinyloxycyclohexyl (meth) acrylate, 5-vinyloxypentyl (meth) acrylate, 6-vinyloxyhexyl (meth) acrylate, 4-vinyloxymethylcyclohexylmethyl (meth) acrylate, ( Vinyl ether group-containing (meth) acrylic such as p-vinyloxymethylphenylmethyl (meth) acrylate, 2- (vinyloxyethoxy) ethyl (meth) acrylate, and 2- (vinyloxyethoxyethoxyethoxy) ethyl (meth) acrylate Acid esters;
Ethylene glycol diallyl ether, diethylene glycol diallyl ether, polyethylene glycol diallyl ether, propylene glycol diallyl ether, butylene glycol diallyl ether, hexanediol diallyl ether, bisphenol A alkylene oxide diallyl ether, bisphenol F alkylene oxide diallyl ether, trimethylolpropane triallyl ether, Ditrimethylolpropane tetraallyl ether, glycerin triallyl ether, pentaerythritol tetraallyl ether, dipentaerythritol pentaallyl ether, dipentaerythritol hexaallyl ether, ethylene oxide-added trimethylolpropane triallyl ether, ethylene oxide-added ditrimethyl Lumpur propane tetra allyl ether, ethylene oxide adduct of pentaerythritol tetra-allyl ether, polyfunctional allyl ethers such as ethylene oxide adduct of dipentaerythritol hexa-allyl ether;
Allyl group-containing (meth) acrylic acid esters such as (meth) acrylic acid allyl;
Multifunctional (meth) acryloyl groups such as tri (acryloyloxyethyl) isocyanurate, tri (methacryloyloxyethyl) isocyanurate, alkylene oxide-added tri (acryloyloxyethyl) isocyanurate, alkylene oxide-added tri (methacryloyloxyethyl) isocyanurate Containing isocyanurates;
Polyfunctional allyl group-containing isocyanurates such as triallyl isocyanurate;
Reaction of polyfunctional isocyanates such as tolylene diisocyanate, isophorone diisocyanate, and xylylene diisocyanate with (meth) acrylic acid esters such as 2-hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate. Polyfunctional urethane (meth) acrylates obtained;
Polyfunctional aromatic vinyls such as divinylbenzene;

Among the polymerizable compounds, it is preferable to use a polyfunctional polymerizable compound from the viewpoint of further improving the curability of the curable resin composition of the present invention. When a polyfunctional polymerizable compound is used as the polymerizable compound, the functional number is preferably 3 or more, more preferably 4 or more, and still more preferably 5 or more. Further, from the viewpoint of further suppressing curing shrinkage, the functional number is preferably 10 or less, more preferably 8 or less.
The molecular weight of the polymerizable compound is not particularly limited, but is preferably 2000 or less from the viewpoint of handling.

  When a polyfunctional polymerizable compound is used as the polymerizable compound, among the polymerizable compounds, from the viewpoint of reactivity, economy, availability, etc., a polyfunctional (meth) acrylate compound, a polyfunctional urethane (meth) acrylate It is preferable to use a compound having a (meth) acryloyl group such as a compound or a (meth) acryloyl group-containing isocyanurate compound. More preferably, it is a polyfunctional (meth) acrylate compound, whereby the curable resin composition becomes more excellent in photosensitivity and curability, and it becomes possible to obtain a cured product having higher hardness and transparency. . More preferably, a trifunctional or higher polyfunctional (meth) acrylate compound is used.

The content ratio of the polymerizable compound may be appropriately set according to the purpose and use in addition to the type of the polymerizable compound to be used and the type of the (meth) acrylate-based polymer. Therefore, it is preferably 2% by mass or more and more preferably 80% by mass or less with respect to 100% by mass of the total solid content of the curable resin composition. The lower limit is more preferably 5% by mass or more, further preferably 8% by mass or more, particularly preferably 10% by mass or more, and the upper limit is more preferably 70% by mass or less, still more preferably 50% by mass or less, particularly preferably. Is 30% by mass or less, and most preferably 20% by mass or less.
<Photopolymerization initiator>
The curable resin composition further contains a photopolymerization initiator. The photopolymerization initiator is preferably a radical polymerizable photopolymerization initiator. A radical polymerizable photopolymerization initiator is one that generates a polymerization initiating radical by irradiation with an active energy ray such as an electromagnetic wave or an electron beam, and one or more commonly used ones can be used. . Moreover, you may use together 1 type (s) or 2 or more types of photosensitizers, radical photopolymerization promoters, etc. as needed. A photosensitizer and / or photoradical polymerization accelerator may be used together with the photopolymerization initiator, or may not be used. Even if a photosensitizer and / or a radical photopolymerization accelerator are not used in combination, the effects of the present invention can be sufficiently exerted, but when used together, sensitivity and curability are further improved.

Specific examples of the photopolymerization initiator include the following compounds.
2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1- [4- (2 -Hydroxyethoxy) phenyl] -2-hydroxy-2-methyl-1-propan-1-one, 2-hydroxy-1- {4- [4- (2-hydroxy-2-methylpropionyl) benzyl] phenyl}- 2-methylpropan-1-one, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl)- Butanone-1,2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) fur Nyl] -1-butanone and other alkylphenone compounds; benzophenone, 4,4′-bis (dimethylamino) benzophenone, benzophenone compounds such as 2-carboxybenzophenone; benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin Benzoin compounds such as isobutyl ether; thioxanthone compounds such as thioxanthone, 2-ethylthioxanthone, 2-isopropylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone;
2- (4-methoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4-methoxynaphthyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4 -Ethoxynaphthyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4-ethoxycarboquinylnaphthyl) -4,6-bis (trichloromethyl) -s-triazine, and other halomethylated triazine compounds 2-trichloromethyl-5- (2′-benzofuryl) -1,3,4-oxadiazole, 2-trichloromethyl-5- [β- (2′-benzofuryl) vinyl] -1,3,4 Halomethylated oxadiazole compounds such as oxadiazole, 4-oxadiazole, 2-trichloromethyl-5-furyl-1,3,4-oxadiazole; 2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole, 2,2′-bis (2,4-dichlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole, 2,2′-bis (2,4,6-trichlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2 ′ -Biimidazole compounds such as biimidazole; 1,2-octanedione, 1- [4- (phenylthio)-, 2- (O-benzoyloxime)], ethanone, 1- [9-ethyl-6- (2 -Methylbenzoyl) -9H-carbazol-3-yl]-, 1- (O-acetyloxime) and other oxime ester compounds; bis (η5-2,4-cyclopentadien-1-yl) -bis (2, 6-Difluoro-3- (1H-pyrrole-1- Le) - phenyl) titanocene compounds such as titanium; p-dimethylaminobenzoic acid, p- benzoic acid ester compounds such as diethyl benzoate; acridine compounds such as 9-phenyl acridine or the like.

  Examples of the photosensitizer and photoradical polymerization accelerator that may be used in combination with the photopolymerization initiator include dye compounds such as xanthene dyes, coumarin dyes, 3-ketocoumarin compounds, and pyromethene dyes; 4-dimethylamino Examples thereof include dialkylaminobenzene compounds such as ethyl benzoate and 2-ethylhexyl 4-dimethylaminobenzoate; mercaptan hydrogen donors such as 2-mercaptobenzothiazole, 2-mercaptobenzoxazole and 2-mercaptobenzimidazole.

  The content of the photopolymerization initiator may be appropriately set according to the purpose, use, etc., and is not particularly limited, but is 0 with respect to 100 parts by mass of the total solid content of the curable resin composition excluding the photopolymerization initiator. It is suitable that it is 1 part by mass or more. Thereby, the hardened | cured material excellent by adhesiveness can be obtained, and peeling is suppressed more fully even after high temperature exposure. In consideration of the balance between the influence of the decomposition product of the photopolymerization initiator, economy, and the like, the amount is preferably 30 parts by mass or less. The lower limit is more preferably 0.5 parts by mass or more, further preferably 1 part by mass or more, particularly preferably 2 parts by mass or more, and the upper limit is more preferably 25 parts by mass or less, and still more preferably 20 parts by mass or less. is there.

The photosensitizer and the radical photopolymerization accelerator do not have to be used as described above. However, in the case of using the photosensitizer and the photoradical polymerization accelerator, a curable resin is used from the viewpoint of balance between curability, influence of decomposition products, and economy. It is preferable that it is 0.001-20 mass% with respect to 100 mass% of solid content total amount of a composition. More preferably, it is 0.01-15 mass%, More preferably, it is 0.05-10 mass%.
<Other ingredients>
-Solvent-
The curable resin composition preferably also contains a solvent. A solvent is preferably used as a diluent or the like. That is, specifically, the viscosity is lowered and the handling property is improved; the coating film is formed by drying; the coloring material is used as a dispersion medium; and the like. It is a low-viscosity organic solvent or water that can dissolve or disperse each of the components.

  As the solvent, those usually used can be used, and may be appropriately selected according to the purpose and application, and are not particularly limited, and examples thereof include the following compounds. These may be used alone or in combination of two or more.

Monoalcohols such as methanol, ethanol, isopropanol, n-butanol, s-butanol; glycols such as ethylene glycol and propylene glycol; cyclic ethers such as tetrahydrofuran and dioxane; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene Glycol monoethers such as 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 monobutyl ether, 3-methoxybutanol; ethylene glycol dimethyl ether, ethylene glycol Jie Ether, ethylene glycol ethyl methyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol ethyl methyl ether, propylene glycol dimethyl ether, glycol ethers such as propylene glycol diethyl ether;
Ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol Esters of glycol monoethers such as monobutyl ether acetate, dipropylene glycol monomethyl ether acetate, dipropylene glycol monoethyl ether acetate, dipropylene glycol monobutyl ether acetate, 3-methoxybutyl acetate Methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, methyl propionate, ethyl propionate, butyl propionate, methyl lactate, ethyl lactate, butyl lactate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, Alkyl esters such as methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, methyl acetoacetate, ethyl acetoacetate; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone; benzene, toluene, xylene, ethylbenzene, etc. Aromatic hydrocarbons; Aliphatic hydrocarbons such as hexane, cyclohexane, and octane; Amides such as dimethylformamide, dimethylacetamide, and N-methylpyrrolidone; Water;

  The amount of the solvent used may be appropriately set according to the purpose and application, and is not particularly limited, but is 10 to 90% by mass in the total amount of 100% by mass of the curable resin composition of the present invention. It is preferable to do. More preferably, it is 20-80 mass%.

The curable resin composition further includes, for example, a coloring material (also referred to as a colorant); a dispersant; a heat resistance improver; a leveling agent; a development aid; Inorganic fine particles such as silane, aluminum and titanium coupling agents; thermosetting resins such as fillers, epoxy resins, phenolic resins and polyvinylphenol; curing aids such as polyfunctional thiol compounds; plasticizers; polymerization Inhibitors; UV absorbers; antioxidants; matting agents; antifoaming agents; antistatic agents; slip agents; surface modifiers; thixotropic agents; thixotropic agents; quinonediazide compounds; 1 type (s) or 2 or more types, such as an acidic compound; acid generator; For example, when using the said curable resin composition for a color filter use, it is preferable that a coloring material is included. Thus, the form in which the curable resin composition further contains a color material is also one of the preferred forms of the present invention. A form containing at least one selected from the group consisting of a colorant, a dispersant, a heat resistance improver, a leveling agent, a coupling agent, and a development aid is also suitable. Hereinafter, these contained components will be described.
-Color material-
As the color material, for example, a pigment or a dye is preferably used. These may be used alone or in combination of two or more. Moreover, you may combine a pigment and dye. For example, when forming red, blue, and green pixels of a color filter, a technique that exhibits color characteristics obtained by combining color materials, such as blue and purple, green and yellow, is preferably used. Further, when forming a black matrix, it can be formed using a black color material.
Among the above pigments and dyes, for example, pigments (for example, organic pigments or inorganic pigments) are excellent in terms of durability, and for example, dyes are excellent in terms of improving luminance of panels and the like. These may be selected or used in combination. Of the pigments, organic pigments are more preferable.

  Examples of the pigment include azo pigments, phthalocyanine pigments, polycyclic pigments (for example, quinacridone, perylene, perinone, isoindolinone, isoindoline, dioxazine, thioindigo, anthraquinone, quinophthalone). , Metal complex, diketopyrrolopyrrole, etc.), organic pigments such as dye lake pigments; white and extender pigments (eg, titanium oxide, zinc oxide, zinc sulfide, clay, talc, barium sulfate, calcium carbonate, etc.) Chromatic pigment (for example, chrome lead, cadmium, chromium vermilion, nickel titanium, chromium titanium, yellow iron oxide, bengara, zinc chromate, red lead, ultramarine, bitumen, cobalt blue, chromium green, chromium oxide, bismuth vanadate, etc.) , Black pigments (eg carbon black, bone black, graphs) Ito, iron black, titanium black, etc.), the luminous material pigments (e.g. pearl pigments, aluminum pigments, bronze pigments, etc.), fluorescent pigments (such as zinc sulfide, strontium sulfide, and inorganic pigments strontium aluminate, etc.) and the like. Examples of pigment colors that can be used include yellow, red, purple, blue, green, brown, black, and white.

  The pigment may also be subjected to surface treatment such as rosin treatment, surfactant treatment, resin dispersant treatment, pigment derivative treatment, oxide film treatment, silica coating, wax coating, etc. depending on the purpose and application.

  Specific examples of the pigments are shown below by color index (CI; issued by The Society of Dyers and Colorists) by color, but the color material of the present invention is not limited to these. Moreover, these may be used independently and may be used in combination of 2 or more types. The following “CI” means a color index, and a number means a color index number.

  Examples of yellow pigments include C.I. I. Pigment Yellow 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 16, 17, 20, 24, 31, 32, 34, 35, 35: 1, 36, 36: 1, 37, 37: 1, 40, 41, 42, 43, 48, 49, 53, 55, 60, 61, 61: 1, 62, 62: 1, 63, 65, 71, 73, 74, 75, 77, 81, 83, 87, 93, 94, 95, 97, 98, 99, 100, 101, 104, 105, 106, 108, 109, 110, 111, 113, 114, 116, 117, 119, 120, 123, 124, 126, 127, 127: 1, 128, 129, 130, 133, 134, 136, 138, 139, 142, 147, 148, 150, 151, 152, 153, 154, 155, 156, 157 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170.172, 173, 174, 175, 176, 179, 180, 181, 182, 183, 184, 185, 188, 189, 190, 191, 191: 1, 192, 193, 194, 195, 196, 197, 198, 199, 200, 202, 203, 204, 205, 206, 207, 208, 209, 209: 1, 212, 213, 214, 215, 219 and the like.

Examples of the orange pigment include C.I. I. Pigment Orange 1, 2, 3, 4, 5, 13, 15, 16, 17, 19, 20, 21, 22, 23, 24, 31, 34, 36, 38, 39, 40, 43, 46, 48, 49, 51, 60, 61, 62, 64, 65, 67, 68, 69, 70, 71, 72, 73, 74, 75, 77, 78, 79, 81, and the like.
Examples of purple pigments include C.I. I. Pigment Violet 1, 1: 1, 2, 2: 2, 3, 3: 1, 3: 3, 5,5: 1, 13, 14, 15, 16, 17, 19, 23, 25, 27, 29, 31, 32, 36, 37, 38, 39, 42, 44, 47, 49, 50 and the like.

  Examples of red pigments include C.I. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 21, 22, 23, 31, 32, 37, 38, 40, 41, 42, 47, 48, 48: 1, 48: 2, 48: 3, 48: 4, 48: 5, 49, 49: 1, 49: 2, 50: 1, 52, 52: 1, 52: 2, 53, 53: 1, 53: 2, 53: 3, 54, 57, 57: 1, 57: 2, 58, 58: 2, 58: 4, 60, 60: 1, 63, 63: 1, 63: 2, 64, 64: 1, 68, 69, 81, 81: 1, 81: 2, 81: 3, 81: 4, 83, 88, 89, 90: 1, 95, 97, 101, 101: 1, 102, 104, 105, 106, 108, 108: 1, 109, 112, 113, 114, 122, 123, 136, 14 146, 147, 149, 150, 151, 164, 166, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185 187, 188, 190, 193, 194, 200, 202, 206, 207, 208, 209, 210, 211, 213, 214, 215, 216, 220, 221, 224, 226, 230, 231, 232, 233 235, 236, 237, 238, 239, 242, 243, 245, 247, 248, 249, 250, 251, 253, 254, 255, 256, 257, 258, 259, 260, 262, 263, 264, 265 266, 267, 268, 269, 270, 271, 272, 273 274,275,276,279, and the like.

Examples of the blue pigment include C.I. I. Pigment Blue 1, 1: 2, 9, 14, 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 5, 15: 6, 16, 17, 17: 1, 19, 24, 24: 1, 25, 26, 27, 28, 29, 33, 35, 36, 56, 56: 1, 60, 61, 61: 1, 62, 63, 66, 67, 68, 71, 72, 73, 74, 75, 76, 78, 79, 80 and the like.
Examples of the green pigment include C.I. I. Pigment green 1, 2, 4, 7, 8, 10, 13, 15, 17, 18, 19, 26, 36, 45, 48, 50, 51, 54, 55, 58 and the like.

Examples of the brown pigment include C.I. I. Pigment brown 5, 6, 23, 24, 25, 32, 41, 42, and the like.
Examples of the black pigment include aniline black, carbon black, lamp black, bone black, black iron, titanium black, C.I. I. Pigment black 1, 6, 7, 9, 10, 11, 12, 13, 20, 31, 32, 34, and the like. Examples of white pigments include C.I. I. Pigment white 1, 2, 4, 5, 6, 7, 11, 12, 18, 19, 21, 22, 23, 26, 27, 28, and the like.

  As the dye, for example, organic dyes described in JP 2010-9033 A, JP 2010-211198 A, JP 2009-51896 A, and JP 2008-50599 A may be used. it can. Of these, azo dyes, anthraquinone dyes, phthalocyanine dyes, quinoneimine dyes, quinoline dyes, nitro dyes, carbonyl dyes, methine dyes, and the like are preferable.

The content ratio of the color material (that is, the total ratio of the pigment and the dye) can be appropriately set according to the purpose and application, but the preferable range of the content ratio of the color material is a solid content of the curable resin composition. It is 3-70 mass% with respect to the total amount of 100 mass%. More preferably, it is 5-60 mass%, More preferably, it is 10-50 mass%.
-Dispersant-
The above-mentioned dispersant has an interaction site with a color material and an interaction site with a dispersion medium (for example, a solvent or a binder resin), and has a function of stabilizing the dispersion of the color material into the dispersion medium. In general, it is classified into a resin-type dispersant (for example, a polymer dispersant), a surfactant (for example, a low-molecular dispersant), and a pigment derivative. The curable resin composition of the present invention preferably contains a dispersant together with the color material. In addition, as a dispersant (that is, a resin-type dispersant, a surfactant and / or a pigment derivative), a commonly used dispersant can be used. Moreover, one type of dispersant may be used alone, or two or more types may be used in combination.

Examples of the resin-type dispersant include polycarboxylic acid esters such as polyurethane and polyacrylate, unsaturated polyamides, polycarboxylic acids, polycarboxylic acid amine salts, polycarboxylic acid ammonium salts, polycarboxylic acid alkylamine salts, and polysiloxanes. , Long-chain polyaminoamide phosphate, hydrogen group-containing polycarboxylic acid ester, amide formed by reaction of poly (lower alkyleneimine) with polyester having a free carboxyl group, or a salt thereof, (meth) acrylic acid-styrene Copolymer, (meth) acrylic acid- (meth) acrylic acid ester copolymer, styrene-maleic acid copolymer, polyvinyl alcohol, polyvinylpyrrolidone, polyester, modified polyacrylate, ethylene oxide / polypropylene oxide adduct, etc. All It is.
The resin-type dispersant has a graft structure in which the main chain is an anchor chain having an interaction site with a coloring material, and the graft chain is a compatible chain having an interaction property with a dispersion medium. In addition, a resin in which an anchor chain and a compatible chain have a block structure is particularly preferably used.

Examples of the trade name of the resin-type dispersant include the following. However, it is not limited to these.
EFKA-46, 47, 48, 745, 1101, 1120, 1125, 4008, 4009, 4046, 4047, 4520, 4540, 4550, 6750, 4010, 4015, 4020, 4050, 4055, 4060, 4080, 4300, 4330, 4400, 4401, 4402, 4403, 4406, 4800, 5010, 5044, 5244, 5054, 5055, 5063, 5064, 5065, 5066, 1210, 2150, KS860, KS873N, 7004, 1813, 1860, 1401, 1200, 550, EDAPLAN 470, 472, 480, 482, K-SPERSE 131, 1525070, 5207 (above, manufactured by EFKA ADDITIVES); Anti-Ter ra-U, Anti-Terra-U100, Anti-Terra-204, Anti-Terra-205, Anti-Terra-P, Disperbyk-101, 102, 103, 106, 108, 109, 110, 111, 112, 151, 160, 161, 162, 163, 164, 166, 182, P-104, P-104S, P105, 220S, 203, 204, 205, 2000, 2001, 9075, 9076, 9077 (above, manufactured by Big Chemie); SOLPERSE 3000 5000, 9000, 12000, 13240, 13940, 17000, 20000, 22000, 24000, 24000GR, 26000, 28000 (manufactured by Nihon Lubrizol); Disperlon 7301, 32 374, 234, 1220, 2100, 2200, KS260, KS273N, 152MS (above, manufactured by Enomoto Kasei Co., Ltd.); Ajisper PB-711, 821, 822, 880, PN-411, PA-111 (above, Ajinomoto Fine Techno Co., Ltd.) KP series (manufactured by Shin-Etsu Chemical Co., Ltd.); Polyflow series (manufactured by Kyoeisha Chemical Co., Ltd.); Megafuck series (manufactured by DIC (DIC)); Disperseid series (manufactured by San Nopco);

  Examples of the surfactant include polyoxyethylene alkyl ether sulfate, sodium dodecylbenzenesulfonate, sodium alkylnaphthalenesulfonate, sodium alkyldiphenyletherdisulfonate, lauryl sulfate monoethanolamine, lauryl sulfate triethanolamine, ammonium lauryl sulfate, Anionic surfactants such as sodium stearate and sodium lauryl sulfate; nonions such as polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene nonylphenyl ether, polyoxyethylene sorbitan monostearate and polyethylene glycol monolaurate Surfactants; cationic boundaries such as alkyl quaternary ammonium salts and their ethylene oxide adducts Alkyl betaines such as alkyl dimethylamino acetic acid betaine, and amphoteric surfactants such as alkyl imidazolines; active agents.

  The dye derivative is a compound having a structure in which a functional group is introduced into the dye. Examples of the functional group include a sulfonic acid group, a sulfonamide group and a quaternary salt thereof, a dialkylamino group, a hydroxyl group, a carboxyl group, and an amide group. And phthalimide groups. Examples of the structure of the base dye include azo, anthraquinone, quinophthalone, phthalocyanine, quinacridone, benzimidazolone, isoindoline, dioxazine, indanthrene, perylene, diketopyrrolopyrrole. And the like.

The content of the dispersant (that is, the resin-type dispersant, the surfactant and / or the pigment derivative) may be appropriately set according to the purpose and application, but the dispersion stability and durability (heat resistance, light resistance) From the viewpoint of balance between weather resistance and the like) and transparency, for example, it is preferably 0.01 to 60% by mass with respect to 100% by mass of the total solid content of the curable resin composition. More preferably, it is 0.1-50 mass%, More preferably, it is 0.3-40 mass%.
-Heat resistance improver-
The heat resistance improver is preferably used for improving heat resistance and strength. As the heat resistance improver, for example, an N- (alkoxymethyl) melamine compound, a compound having two or more epoxy groups or oxetanyl groups, and the like are suitable. In particular, when the curable resin composition is used as a resist for a photospacer, a transparent resist for a protective film, or a resist for an interlayer insulating film, these uses are preferable.

  In addition, the curable resin composition of the present invention preferably contains an antioxidant in order to prevent heat-resistant coloring of the cured product. The N-substituted maleimide monomer unit is thermally stable and has little decomposition and coloring, but at a high temperature of 230 ° C. to 250 ° C., the N atom is oxidized and a slight coloring occurs. With the recent increase in quality of liquid crystal panels, there is a demand for further reduction in thermal coloring. Therefore, as a result of intensive studies, the present inventors have found that thermal coloring at high temperatures can be greatly reduced by adding an antioxidant.

As the antioxidant used in the present invention, a hindered phenol-based antioxidant or a phosphite-based antioxidant is preferable. As the hindered phenol-based antioxidant, pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], n-octadecyl-β- (4′-hydroxy-3 ′, 5′-di-tert-butylphenyl) propionate, 3,9-bis [1,1-dimethyl-2- [β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl ] 2,4,8,10-tetraoxaspiro [5,5] -undecane, 2- [1- (2-hydroxy-3,5-di-t-pentylphenyl) ethyl] -4,6-di- t-pentylphenyl acrylate, 2-t-butyl-6- (3-t-butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate, 2,6-di-t-butyl- 4-methylphenol, 2,4,6-tri-t-butylphenol, 2,6-di-t-butylphenol, 2-t-butyl-4,6-dimethylphenol, 2,6-di-t-butyl- 4-ethylphenol, 2,6-di-t-butyl-4-n-butylphenol, 2,6-di-t-butyl-4-isobutylphenol, 2,6-dicyclopentyl-4-methylphenol, 2- (Α-methylcyclohexyl) -4,6-dimethylphenol, 2,6-diocudadecyl-4-methylphenol, 2,4,6-tricyclohexylphenol, 2,6-di-t-butyl-4-methoxymethylphenol 2,6-di-nonyl-4-methylphenol, 2,4-dimethyl-6- (1′-methylundecyl-1′-yl) phenol, 2,4-dimethyl 6- (1'-methylheptadecyl-1'-yl) phenol, 2,4-dimethyl-6- (1'-methyl-1'-yl) phenol and alkylated monophenols such as a mixture thereof;
2,4-dioctylthiomethyl-6-tert-butylphenol, 2,4-dioctylthiomethyl-6-methylphenol, 2,4-dioctylthiomethyl-6-ethylphenol, 2,6-didodecylthiomethyl-4 -Alkylthiomethylphenols such as nonylphenol and mixtures thereof;
2,2′-methylenebis (4-methyl-6-tert-butylphenol), 2,2′-methylenebis (4-ethyl-6-tert-butylphenol), 2,2′-methylenebis [4-methyl-6- ( α-methylcyclohexyl) phenol]], 2,2′-methylenebis (4-methyl-6-cyclohexylphenol), 2,2′-methylenebis (4-methyl-6-nonylphenol), 2,2′-methylenebis (4 , 6-di-t-butylphenol), 2,2′-ethylidenebis (4,6-di-t-butylphenol), 2,2′-ethylidenebis (4-isobutyl-6-t-butylphenol), 2, 2′-methylenebis [6- (α-methylbenzyl) -4-nonylphenol], 2,2′-methylenebis [6- (α, α-dimethylbenzyl) -4-nonylphenol 4,4′-methylenebis (6-tert-butyl-2-methylphenol), 4,4′-methylenebis (2,6-di-tert-butylphenol), 4,4′-butylidenebis (3-methyl) -6-tert-butylphenol), 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) butane, 2,6-bis ( 3-t-butyl-5-methyl-2-hydroxybenzyl) -4-methylphenol, 1,1,3-tris (5-t-butyl-4-hydroxy-2-methylphenyl) butane, 1,1- Bis (5-t-butyl-4-hydroxy-2-methylphenyl) -3-n-dodecylmercaptobutane, ethylene glycol bis [3,3-bis-3′-t-butyl-4′-hydroxyl Nyl] butyrate], bis (3-t-butyl-4-hydroxy-5-methylphenyl) dicyclopentadiene, bis [2- (3′-t-butyl-2′-hydroxy-5′-methylbenzyl)- 6-tert-butyl-4-methylphenyl] terephthalate, 1,1-bis (3,5-dimethyl-2-hydroxyphenyl) butane, 2,2-bis (3,5-di-tert-butyl-4- Hydroxyphenyl) propane, 2,2-bis (5-t-butyl-4-hydroxy-2-methylphenyl) -4-n-dodecylmercaptobutane, 1,1,5,5-tetra (5-t-butyl) Alkylidene bisphenol and derivatives thereof such as -4-hydroxy-2-methylphenyl) pentane and mixtures thereof;
Etc. Phosphite antioxidants include triphenyl phosphite, tris (nonylphenyl) phosphite, triethyl phosphite, tridecyl phosphite, tris (tridecyl) phosphite, diphenyl mono (2-ethylhexyl) phosphite, Diphenyl monodecyl phosphite, diphenyl mono (tridecyl) phosphite, tristearyl phosphite, tris (2,4-di-tert-butylphenyl) phosphite and the like are preferable.
Among them, a hindered phenol antioxidant which has a high antioxidant ability and is easily available industrially is preferable. In particular, pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] has a high antioxidant effect, is easily available industrially, has a high compatibility with cured products, preferable.
As a preferable compounding quantity of antioxidant, 0.01-5 mass% is preferable with respect to a (meth) acrylate type polymer (100 mass% of solid content), and 0.05-3 mass% is still more preferable. Most preferably, it is 0.1-1 mass%. If the blending amount of the antioxidant is less than the above range, the coloring prevention effect may be reduced, and if it exceeds the above range, curing as a photosensitive resin composition may be inhibited, or the antioxidant itself may be heated. The decomposition product of the antioxidant remains when it is colored or heated. For example, when a curable composition for producing a color filter for a liquid crystal panel is used, the decomposition product oozes out into the liquid crystal, which may reduce the reliability.
-Leveling agent-
The leveling agent is preferably used for improving leveling properties. As the leveling agent, a fluorine-based or silicon-based surfactant is preferable.
-Coupling agent-
The coupling agent is preferably used for improving adhesion. The coupling agent is preferably a silane coupling agent, and examples thereof include epoxy, methacrylic, and amino silane coupling agents. Among these, an epoxy silane coupling agent is preferable.
-Development aid-
The development aid is preferably used for improving developability. Examples of the development aid include monocarboxylic acids such as (meth) acrylic acid, acetic acid and propionic acid; polyvalent carboxylic acids such as maleic acid, fumaric acid, succinic acid, tetrahydrophthalic acid and trimellitic acid; maleic anhydride And carboxylic acid anhydrides such as succinic anhydride, tetrahydrophthalic anhydride, trimellitic anhydride;

It does not specifically limit as a manufacturing method of the said curable resin composition, For example, it can prepare by mixing and disperse | distributing the containing component mentioned above using various mixers and dispersers. The mixing / dispersing step is not particularly limited, and may be performed by a normal method. Further, it may further include other steps that are normally performed. In addition, when the said curable resin composition contains a coloring material, it is suitable to manufacture through the dispersion processing process of a coloring material. As the said dispersion processing process of a coloring material, for example, first, a coloring material (preferably Organic pigments), dispersants and solvents are weighed in predetermined amounts, and the color material is dispersed in fine particles using a dispersing machine such as paint conditioner, bead mill, roll mill, ball mill, jet mill, homogenizer, kneader, blender, etc. to disperse the liquid color material A method of using a liquid (also referred to as a mill base) can be given. Preferably, after kneading and dispersing with a roll mill, kneader, blender or the like, fine dispersion is performed with a media mill such as a bead mill filled with 0.01 to 1 mm beads. A composition containing a (meth) acrylate polymer, a polymerizable monomer, a photopolymerization initiator, and, if necessary, a solvent, a leveling agent, and the like, which are separately stirred and mixed with the obtained mill base. A curable resin composition can be obtained by adding (preferably a transparent liquid) and mixing to obtain a uniform dispersion solution.
In addition, it is preferable that the obtained curable resin composition is filtered with a filter or the like to remove fine dust.
[Cured product]
As described above, the curable resin composition of the present invention is particularly excellent in photosensitivity and curability, and has basic performance such as developability, solvent resistance, adhesion to a substrate (base material), heat resistance, and transparency. It gives a cured product that is excellent in. Such a cured product is also excellent in image formability and surface smoothness, and has, for example, no unexposed residue or background stains after development. A cured product obtained by curing such a curable resin composition is also one aspect of the present invention.

  The cured product (cured film) preferably has a film thickness (thickness) of 0.1 to 20 μm. Thereby, it can fully respond to the request | requirement of low profile, such as a member using the said hardened | cured material, a display apparatus. More preferably, it is 0.5-10 micrometers, More preferably, it is 0.5-8 micrometers.

The cured product is used for various optical members such as color filters, inks, printing plates, printed wiring boards, semiconductor elements, photoresists, etc. used in liquid crystal display devices, solid-state imaging devices, etc., and electrical / electronic devices. Are preferably used. Especially, it is preferable to use for a color filter. Thus, a color filter using the curable resin composition, specifically, a color filter having the cured product on a substrate is also one aspect of the present invention. Hereinafter, the color filter will be further described.
<Color filter>
The color filter of this invention consists of a form which has the said hardened | cured material on a board | substrate.
In the above color filter, the cured product formed from the curable resin composition of the present invention is particularly suitable as a segment that needs to be colored, such as a black matrix or pixels such as red, green, blue, and yellow. However, it is also suitable as a segment that does not necessarily require coloring such as a photospacer, a protective layer, and an orientation control rib.

Examples of the substrate used in the color filter include glass substrates such as white plate glass, blue plate glass, alkali tempered glass, and silica-coated blue plate glass; ring-opened polymers of polyester, polycarbonate, polyolefin, polysulfone, cyclic olefin, and hydrogen thereof. Sheet, film or substrate made of thermoplastic resin such as additive; sheet, film or substrate made of thermosetting resin such as epoxy resin or unsaturated polyester resin; metal substrate such as aluminum plate, copper plate, nickel plate, stainless steel plate A ceramic substrate; a semiconductor substrate having a photoelectric conversion element; a member made of various materials such as a glass substrate (for example, a color filter for LCD) having a color material layer on the surface; Among these, from the viewpoint of heat resistance, a glass substrate or a sheet, film or substrate made of a heat resistant resin is preferable. The substrate is preferably a transparent substrate.
Moreover, you may perform the chemical | medical treatment etc. by a corona discharge process, an ozone process, a silane coupling agent, etc. to the said base material as needed.
<Color filter manufacturing method>
In order to obtain the color filter, for example, for each pixel (that is, for each pixel of one color), a step of placing the curable resin composition on the substrate (also referred to as a placement step) and a placement on the substrate A step of irradiating light to the cured curable resin composition (also referred to as a light irradiation step), a step of developing with a developer (also referred to as a development step), and a step of performing a heat treatment (also referred to as a heating step). It is preferable to adopt a manufacturing method that employs a method and repeats the same method for each color. Note that the order of forming the pixels of each color is not particularly limited.
-Placement step (preferably coating step)-
The arrangement step is preferably performed by coating. Examples of the method of applying the curable resin composition on the substrate include spin coating, slit coating, roll coating, and cast coating, and any method can be preferably used.
In the arranging step, it is preferable that the coating film is dried after the curable resin composition is applied onto the substrate. The coating film can be dried using, for example, a hot plate, an IR oven, a convection oven, or the like. The drying conditions are appropriately selected according to the boiling point of the solvent component contained, the type of the curing component, the film thickness, the performance of the dryer, etc., but it is usually performed at a temperature of 50 to 160 ° C. for 10 seconds to 300 seconds. Is preferred.
-Light irradiation process-
In the light irradiation step, the active light source used is, for example, a xenon lamp, a halogen lamp, a tungsten lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, a medium pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a fluorescent lamp, etc. Lamp light sources, argon ion lasers, YAG lasers, excimer lasers, nitrogen lasers, helium cadmium lasers, semiconductor lasers, and the like are used. Further, examples of the exposure system include a proximity system, a mirror projection system, and a stepper system, but the proximity system is preferably used.
In the irradiation process of the active energy beam, the active energy beam may be irradiated through a predetermined mask pattern depending on the application. In this case, the exposed portion is cured, and the cured portion is insolubilized or hardly soluble in the developer.
-Development process-
The development step is a step of developing with a developer after the light irradiation step described above to remove unexposed portions and form a pattern. Thereby, the patterned cured film can be obtained. The development treatment can be usually performed at a development temperature of 10 to 50 ° C. by a method such as immersion development, spray development, brush development, or ultrasonic development.

  The developer used in the development step is not particularly limited as long as it dissolves the curable resin composition of the present invention. Usually, an organic solvent or an alkaline aqueous solution is used, and a mixture thereof may be used. . In addition, when using alkaline aqueous solution as a developing solution, it is preferable to wash | clean with water after image development.

  Examples of the organic solvent suitable as the developer include an ether solvent and an alcohol solvent. Specifically, for example, dialkyl ethers, ethylene glycol monoalkyl ethers, ethylene glycol dialkyl ethers, diethylene glycol dialkyl ethers, triethylene glycol dialkyl ethers, alkyl phenyl ethers, aralkyl phenyl ethers, diaromatic ethers , Isopropanol, benzyl alcohol and the like.

In addition to the alkaline agent, the alkaline aqueous solution may contain a surfactant, an organic solvent, a buffering agent, a dye, a pigment, and the like as necessary. Examples of the organic solvent in this case include organic solvents suitable as the developer described above.
Examples of the alkali agent include inorganic substances such as sodium silicate, potassium silicate, sodium hydroxide, potassium hydroxide, lithium hydroxide, tribasic sodium phosphate, dibasic sodium phosphate, sodium carbonate, potassium carbonate, and sodium bicarbonate. Alkali agents: Examples include amines such as trimethylamine, diethylamine, isopropylamine, n-butylamine, monoethanolamine, diethanolamine, triethanolamine, tetramethylammonium hydroxide, tetraethylammonium hydroxide, and these may be used alone or in combination of two or more. May be combined.

Examples of the surfactant include nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl esters, sorbitan acid alkyl esters, monoglyceride alkyl esters; alkylbenzene sulfonates, alkylnaphthalene sulfonic acids, and the like. Anionic surfactants such as salts, alkyl sulfates, alkyl sulfonates, sulfosuccinic acid ester salts; amphoteric surfactants such as alkylbetaines and amino acids, and the like. These may be used alone or in combination of two or more. Also good.
-Heating process-
The heating step is a step of further curing the exposed portion (cured portion) by baking after the developing step described above (also referred to as a post-curing step). For example, using a light source such as a high-pressure mercury lamp, for example, a step of post-exposure with a light amount of 0.5 to ⁵ J / cm ² , a step of post-heating at a temperature of 150 to 280 ° C. for 10 seconds to 120 minutes, etc. Can be mentioned. By performing such a post-curing step, it becomes possible to further strengthen the hardness and adhesion of the patterned cured film. Further, by this heating step, a part of the structural unit of the (meth) acrylate polymer contained in the curable resin composition (that is, a part of the tertiary carbon-containing (meth) acrylate monomer). Since the (part) is decomposed, curability and solvent resistance can be improved.

The film thickness of the cured film obtained by the heating step (that is, the cured film obtained by thermosetting the curable resin composition) is preferably 0.1 to 20 μm. By using the curable resin composition of the present invention, a cured film having a sufficiently reduced film thickness can be provided. More preferably, it is 0.5-10 micrometers, More preferably, it is 0.5-8 micrometers.
In addition, it is suitable for the film thickness of the coating film (namely, cured film) obtained by the said heating process that it is 90% or less, when the film thickness of the coating film before a heating is 100%. More preferably, it is 80% or less, More preferably, it is 70% or less.

  In the heating step, the heating temperature is preferably 150 ° C. or higher. Thereby, since the part originating in a part of said tertiary carbon containing (meth) acrylate type monomer is decomposed more effectively, it becomes possible to realize improvement of curability and solvent resistance more. . Furthermore, the curable composition of the present invention is characterized by very little heat-resistant coloring, particularly at high temperatures. For this reason, heat treatment at a higher temperature is possible, so that the curability and solvent resistance are excellent. More preferably, it is 180 degreeC or more, More preferably, it is 220 degreeC or more, Most preferably, it is 235 degreeC or more. Moreover, it is preferable to set it as 280 degrees C or less, More preferably, it is 260 degrees C or less. When the heating temperature exceeds the above range, thermal decomposition occurs, which may cause contamination by decomposition products and increase in thermal coloring, which is not preferable.

Although the heating time in the said heating process is not specifically limited, For example, it is suitable to set it as 5 to 60 minutes. Also, the heating method is not particularly limited, and for example, it can be performed using a heating device such as a hot plate, a convection oven, or a high-frequency heater.
[Display device]
The present invention is also a display device configured using the color filter.
In addition, the display apparatus member and display apparatus which have the hardened | cured material formed with the said curable resin composition are also contained in suitable embodiment of this invention. The cured product (cured film) formed by the curable resin composition is stable, excellent in adhesion to a substrate, etc., and has high hardness, high smoothness, and high transmittance. Therefore, it is particularly suitable as a transparent member, and is also useful as a protective film or insulating film in various display devices.

As the display device, for example, a liquid crystal display device, a solid-state imaging device, a touch panel display device, and the like are suitable.
In addition, when using the said hardened | cured material (cured film) as a member for display apparatuses, the said member may be a film-form single layer or multilayer member comprised from the said cured film, or this single layer or multilayer It may be a member in which another layer is further combined with the above member, or may be a member including the above-mentioned cured film in its constitution.

The present invention will be described in more detail with reference to the following examples. However, the present invention is not limited to these examples. Unless otherwise specified, “part” means “part by mass”.
In the following synthesis examples and the like, various physical properties and the like were measured as follows.
<Weight average molecular weight>
Weight average molecular weight was measured by GPC (gel permeation chromatography) method using HLC-8220GPC (manufactured by Tosoh Corporation) and column: TSKgel SuperHZM-M (manufactured by Tosoh Corporation) using polystyrene as a standard substance and tetrahydrofuran as an eluent.
<Solid content>
About 1 g of a polymer solution (also referred to as a resin solution or a polymer solution) was weighed into an aluminum cup, dissolved by adding about 3 g of acetone, and then naturally dried at room temperature. Then, using a hot air dryer (trade name: PHH-101, manufactured by Espec Corp.), after drying at 140 ° C. for 1.5 hours under vacuum, the mixture was allowed to cool in a desiccator and the mass was measured. From the mass reduction amount, the solid content (% by mass) of the polymer solution was calculated.
<Acid value>
3 g of the resin solution is precisely weighed, dissolved in a mixed solvent of 90 g of acetone and 10 g of water, and an automatic titration apparatus (manufactured by Hiranuma Sangyo Co., Ltd., trade name: COM-555) using a 0.1 N aqueous KOH solution as a titrant. ), The acid value of the polymer solution was measured, and the acid value (AV) per gram of the solid content was determined from the acid value of the solution and the solid content of the solution.
<Heat resistant colorability of curable resin composition>
The curable resin composition was applied on a non-alkali glass plate using a spin coater so that the thickness after drying was 3 μm, dried on a hot plate at 100 degrees for 3 minutes, and then an ultra high pressure mercury lamp was used. The ultraviolet rays were irradiated so that the irradiation amount was 100 mJ / cm ² . After irradiation, it was further dried at 230 ° C. for 30 minutes on a hot plate to prepare a test piece. The obtained test piece was heated on a hot plate at 250 ° C. for 3 hours, cooled to room temperature, and then b ^* value after the heat resistance test using a spectral color difference meter (“EE-6000” manufactured by Nippon Denshoku Industries Co., Ltd.). Was measured.
Synthesis example 1
Propylene glycol monomethyl ether in a reaction vessel equipped with a synthesis thermometer, a stirrer, a gas introduction tube, a cooling tube, and a dropping vessel introduction port for resin solution 1 (CHMI-t-BMA-MMA-HEMA-AA copolymer solution 1) After 190 parts of acetate was charged and purged with nitrogen, it was heated to 90 ° C. On the other hand, as a dropping tank (A), 10 parts of N-cyclohexylmaleimide, 35 parts of t-butyl methacrylate, 20 parts of methyl methacrylate, 20 parts of 2-hydroxyethyl methacrylate, 15 parts of acrylic acid and t-amyl par are added to a beaker. A mixture prepared by stirring and mixing 2.2 parts of oxy-2-ethylhexanoate (“Lupelox 575” manufactured by Arkema Yoshitomi Co., Ltd.) was prepared, and 1.0 part of n-dodecyl mercaptan, propylene glycol monomethyl was added to the dropping tank (B). A mixture obtained by stirring and mixing 10 parts of ether acetate was prepared. After the temperature of the reaction vessel reached 90 ° C., dropping was started over 3 hours from the dropping vessel while maintaining the same temperature, and polymerization was performed. After maintaining the temperature at 90 ° C. for 30 minutes after completion of the dropping, the temperature was raised to 115 ° C. and aging was performed for 90 minutes.
When the obtained polymer solution was analyzed, the weight average molecular weight was 18000, the acid value was 120 mgKOH / g, and the resin solid content was 34.3 mass%.

Synthesis example 2
The amount of the synthetic monomer of Resin Solution 2 (CHMI-t-BMA-MMA-HEMA-AA Copolymer Solution 2) was changed to 20 parts of N-cyclohexylmaleimide, 35 parts of t-butyl methacrylate, 10 parts of methyl methacrylate. Parts, 20 parts of 2-hydroxyethyl methacrylate, 15 parts of acrylic acid, and the same amount as in Synthesis Example 1 except that the amount of n-dodecyl mercaptan charged was 0.6 parts, and the resulting polymer solution was analyzed. As a result, the weight average molecular weight was 18000, the acid value was 120 mgKOH / g, and the resin solid content was 33.8% by mass.

Synthesis example 3
The amount of the synthetic monomer in Resin Solution 3 (CHMI-t-BMA-MMA-HEMA-MAA Copolymer Solution 3) was changed to 10 parts of N-cyclohexylmaleimide, 35 parts of t-butyl methacrylate, methyl methacrylate 16 Parts, 20 parts of 2-hydroxyethyl methacrylate, 19 parts of methacrylic acid, except that the amount of n-dodecyl mercaptan charged was 0.8 part, and the resulting polymer solution was analyzed. As a result, the weight average molecular weight was 20000, the acid value was 120 mgKOH / g, and the resin solid content was 33.0% by mass.

Synthesis example 4
Synthesis of Resin Solution 4 (BzMI-t-BMA-MMA-HEMA-AA Copolymer Solution 4) The same operation as in Synthesis Example 1 was performed except that N-benzylmaleimide was used instead of N-cyclohexylmaleimide. When the obtained polymer solution was analyzed, the weight average molecular weight was 18000, the acid value was 120 mgKOH / g, and the resin solid content was 33.6% by mass.
Synthesis example 5
Resin solution 5 (CHMI-t-BMA-MMA-HEMA-AA copolymer solution 5)
The same procedure as in Synthesis Example 1 was performed except that the amount of monomer charged was 35 parts of N-cyclohexylmaleimide, 30 parts of t-butyl methacrylate, 20 parts of 2-hydroxyethyl methacrylate, and 15 parts of acrylic acid. When the obtained polymer solution was analyzed, the weight average molecular weight was 22000, the acid value was 120 mgKOH / g, and the resin solid content was 33.9% by mass.

Example 1
100 parts of the resin solution 1, 20 parts of dipentaerythritol hexaacrylate as the radical polymerizable compound, 2 parts of Irgacure 907 (manufactured by BASF) as the radical polymerizable photopolymerization initiator, and Irganox 1010 (BASF company) as the antioxidant 0.2 parts) and 55 parts of propylene glycol monomethyl ether acetate were mixed to obtain a curable resin composition 1. The heat-resistant coloring property of the obtained curable resin composition 1 was evaluated by the above method. The b ^* value after the heat test was measured and found to be 1.0.

Example 2
The curable resin composition 2 was measured in the same manner as in Example 1 except that the resin solution 2 was used.

Example 3
The curable resin composition 3 was measured in the same manner as in Example 1 except that the resin solution 3 was used.

Comparative Example 1
The curable resin composition 3 was measured in the same manner as in Example 1 except that the resin solution 4 was used. In the comparative example 1, it turned out that the heat-resistant coloring property in 250 degreeC is inferior to Examples 1-3.

Comparative Example 2
The curable resin composition 3 was measured in the same manner as in Example 1 except that the resin solution 5 was used. In the comparative example 2, it turned out that the heat-resistant coloring property in 250 degreeC is inferior to Examples 1-3.

  Thus, it is clear that the curable resin composition of the present invention has very little heat-resistant colorability in heat treatment at a high temperature of 250 ° C.

  A member for a display device and a display device including a cured product formed from the curable resin composition of the present invention can be suitably used in the optical field, the electric / electronic field, and the like.

Claims (7)

A curable resin composition comprising a (meth) acrylate polymer, a polymerizable compound and a photopolymerization initiator,
The (meth) acrylate polymer is an N-alkylmaleimide monomer and / or N-cycloalkylmaleimide monomer unit of 2 to 30% by mass, and a tertiary carbon-containing (meth) acrylate monomer unit of 20 to 20%. A curable resin composition comprising 60% by mass, 10 to 40% by mass of a monomer unit having a hydroxyl group, and 5 to 25% by mass of a (meth) acrylic acid unit. The curing according to claim 1, wherein the tertiary carbon-containing (meth) acrylate monomer unit has a structure in which an oxygen atom adjacent to a (meth) acryloyl group is bonded to a tertiary carbon atom. Resin composition. 3. The curable resin composition according to claim 1, wherein the (meth) acrylate polymer has a content of a monomer unit containing an aromatic hydrocarbon structure of 5% by mass or less. The curable resin composition according to claim 1, wherein the N-cycloalkylmaleimide monomer unit is a structural unit derived from N-cyclohexylmaleimide. Hardened | cured material formed by hardening | curing the curable resin composition in any one of Claims 1-4. A color filter comprising the cured product according to claim 5 on a substrate. A display device comprising the color filter according to claim 6.