TWI663219B - Colored composition, colored cured film and display element - Google Patents

Abstract

An object of the present invention is to provide a coloring composition which is suitable for forming a coloring hardened film having both heat resistance and solvent resistance and suppressing transferability and having a dye.

The solution of the present invention is a coloring composition containing a coloring agent (A) and a polymerizable compound (C), wherein the coloring agent contains a polymer having a structural unit represented by the following formula (1) .

[In formula (1), R ⁰ represents a hydrogen atom or a methyl group, and X represents a halogen group, a halogenated hydrocarbon group, or a bond containing an atom other than a carbon atom, a hydrogen atom, or a halogen atom between CC bonds of the halogenated hydrocarbon group. Y represents a single bond or a divalent organic group, and Z ⁺ represents a triarylmethane-based cationic chromophore, a methine-based cationic chromophore, or an azo system selected from a specific structure. Cationic chromophore, diarylmethane cationic chromophore, quinone imine cationic chromophore, anthraquinone cationic chromophore, phthalocyanine cationic chromophore and At least one type of cationic chromophore in the system. ]

Description

   Colored composition, colored cured film and display element   

The present invention relates to a coloring composition, a coloring cured film, and a display element, and more specifically, for use in forming a transmissive or reflective color liquid crystal display element, a solid-state imaging element, an organic EL display element, an electronic paper, and the like. A colored composition of a colored cured film, a colored cured film formed using the colored composition, and a display element including the colored cured film.

When producing a color filter using a color-sensitive radiation composition, it is known to apply a pigment-dispersed color-sensitive radiation composition to a substrate and dry it, and then irradiate the dried coating film with radiation in a desired pattern shape (hereinafter (Referred to as "exposure"), and a method of obtaining pixels of each color by performing development (for example, refer to Patent Documents 1 to 2). A method of forming a black matrix using a photopolymerizable composition in which carbon black is dispersed is also known (for example, refer to Patent Document 3). A method of obtaining pixels of each color by an inkjet method using a pigment-dispersed colored resin composition is also known (for example, refer to Patent Document 4).

In recent years, high-contrast liquid crystal display devices and high-definition solid-state imaging devices have been urgently required. In order to achieve these, technologies using dyes as colorants have been studied. However, in general, problems with heat resistance, solvent resistance, and the like occur when a dye is used as compared with a case where a pigment is used as a colorant.

Against the above background, as a dye-containing coloring composition capable of forming a pixel having excellent heat resistance, for example, Patent Document 5 proposes using a triarylmethane-based dye having an alkylsulfonimide anion.

    Prior art literature         Patent literature    

Patent Document 1 Japanese Unexamined Patent Publication No. 2-144502

Patent Document 2 Japanese Unexamined Patent Publication No. 3-52201

Patent Document 3 Japanese Patent Laid-Open No. 6-35188

Patent Document 4 Japanese Patent Laid-Open No. 2000-310706

Patent Document 5 Japanese Patent Application Publication No. 2012-83652

However, in the dye proposed in Patent Document 5, it is clear that the balance between the heat resistance and the solvent resistance of the pixel is poor. In addition, the present inventors have discovered that a colorant-free hardened film (hereinafter also referred to as "migration property") is transferred from a dye in a pixel of a coloring pattern to a pixel of another color and a protective film that is adjacent to it, This also causes a problem that the display characteristics of the display element are lowered, but this problem is not considered at all in Patent Document 5.

Therefore, an object of the present invention is to provide a coloring composition suitable for forming a coloring cured film that is compatible with both heat resistance and solvent resistance and suppresses migration. Another object of the present invention is to provide a colored cured film formed using the colored composition and a display element including the colored cured film.

As a result of intensive studies, the present inventors have found that the above-mentioned problems can be solved by using a coloring agent having a specific structure.

That is, the present invention provides a coloring composition containing the coloring composition (A) and (C) a polymerizable compound, wherein the coloring agent contains a polymer having a structural unit represented by the following formula (1) ( Hereinafter also referred to as "this colorant").

[In formula (1), R ⁰ represents a hydrogen atom or a methyl group, and X represents a halogen group, a halogenated hydrocarbon group, or a bond containing an atom other than a carbon atom, a hydrogen atom, or a halogen atom between CC bonds of the halogenated hydrocarbon group. Y represents a single bond or a divalent organic group, Z ⁺ represents a triarylmethane-based cationic chromophore selected from the following formula (2-1), and the following formula (2-2 ), A triarylmethane cationic chromophore, a methine cationic chromophore, an azo cationic chromophore, a diarylmethane cationic chromophore, quinoneimine Based cationic chromophore, anthraquinone based cationic chromophore, phthalocyanine based cationic chromophore, and At least one type of cationic chromophore in the system. ]

[In the formula (2-1), R ¹ to R ⁶ independently of each other represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, and a substituted or unsubstituted ring having 3 to 8 carbon atoms. Alkyl or substituted or unsubstituted aryl, R ⁷ to R ⁹ each independently represent an alkyl or chlorine atom having 1 to 8 carbon atoms, l and m each independently represent an integer of 0 to 4 and n represents 0 Integer of ~ 6.

Among them, l, m, and n are not 0 at the same time. ]

[In the formula (2-2), R ¹¹ to R ¹⁶ each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, and a substituted or unsubstituted ring having 3 to 8 carbon atoms. An alkyl group or a substituted or unsubstituted aryl group, R ¹⁷ to R ¹⁹ each independently represent an alkyl group or a chlorine atom having 1 to 8 carbon atoms, and s, t, and u each independently represent an integer of 0 to 4. ]

The present invention also provides a colored cured film formed using the colored composition and a display element including the colored cured film. Here, the "colored cured film" refers to pixels of each color, a black matrix, a black spacer, and the like used in a display element and a solid-state imaging element.

By using the coloring composition of the present invention, it is possible to form a coloring cured film having both a high level of heat resistance and solvent resistance while suppressing the transferability.

Therefore, the coloring composition of the present invention is extremely suitable for producing display elements such as color liquid crystal display elements, organic EL display elements, electronic paper, and solid-state imaging elements such as CMOS image sensors.

Embodiment of the invention

Hereinafter, the present invention will be described in detail.

[Coloring composition]

Hereinafter, the constituent components of the coloring composition of the present invention will be described in detail.

-(A) Colorant-

The coloring composition of the present invention contains a polymer having a structural unit represented by the following formula (1) as a colorant.

[In formula (1), R ⁰ represents a hydrogen atom or a methyl group, and X represents a halogen group, a halogenated hydrocarbon group, or a bond containing an atom other than a carbon atom, a hydrogen atom, or a halogen atom between CC bonds of the halogenated hydrocarbon group. Y represents a single bond or a divalent organic group, Z ⁺ represents a triarylmethane-based cationic chromophore selected from the following formula (2-1), and the following formula (2-2 ) Represented by triarylmethane cationic chromophore, methine cationic chromophore, azo cationic chromophore, diarylmethane cationic chromophore, quinone Based cationic chromophore, anthraquinone based cationic chromophore, phthalocyanine based cationic chromophore, and At least one type of cationic chromophore in the system. ]

R ⁰ is preferably a methyl group among a hydrogen atom or a methyl group.

Examples of the halogen group in X include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

Examples of the hydrocarbon group forming the skeleton of the halogenated hydrocarbon group in X include (1) an aliphatic hydrocarbon group, (2) an alicyclic hydrocarbon group, and (3) an aliphatic hydrocarbon group having an alicyclic hydrocarbon group as a substituent (hereinafter referred to as Are "alicyclic hydrocarbon-substituted aliphatic hydrocarbon groups"), (4) aromatic hydrocarbon groups, (5) aromatic hydrocarbon groups having aliphatic hydrocarbon groups as substituents (hereinafter referred to as "aliphatic hydrocarbon-substituted aromatic hydrocarbon groups") (6) an aliphatic hydrocarbon group having an aromatic hydrocarbon group as a substituent (hereinafter referred to as "aromatic hydrocarbon-substituted aliphatic hydrocarbon group") and the like. As a hydrocarbon group which forms the skeleton of a halogenated hydrocarbon group, the following characteristic groups are preferable from a viewpoint of solubility in an organic solvent.

That is, the (1) aliphatic hydrocarbon group is preferably an alkyl group, and the alkyl group may be a straight chain or a branched chain. The number of carbon atoms of the alkyl group is preferably 1 to 20, and particularly preferably 1 to 8. Specific examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, secondary butyl, tertiary butyl, n-pentyl, secondary pentyl, and neo Amyl, n-hexyl, n-heptyl, n-octyl, etc.

The (2) alicyclic hydrocarbon group may be a 2 to 4 ring crosslinked alicyclic hydrocarbon group. The alicyclic hydrocarbon group is preferably an alicyclic saturated hydrocarbon group having 3 to 20 carbon atoms, and more preferably an alicyclic saturated hydrocarbon group having 3 to 12 carbon atoms. Specific examples include cycloalkyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclododecyl, norbornyl, fluorenyl, and adamantane. Base, bicyclooctyl, etc.

As the (3) alicyclic hydrocarbon-substituted aliphatic hydrocarbon group, an alicyclic saturated hydrocarbon-substituted alkyl group is preferable, and as the number of carbon atoms thereof, 4 to 20 are preferable, and 6 to 14 is particularly preferable. Specific examples include cyclopropylmethyl, cyclobutylmethyl, cyclohexylmethyl, cyclohexylpropyl, adamantylmethyl, 1- (1-adamantyl) ethyl, and cyclopentylethyl. Base etc.

The (4) aromatic hydrocarbon group is preferably an aryl group having 6 to 14 carbon atoms, and more preferably an aryl group having 6 to 10 carbon atoms. Specific examples include phenyl, naphthyl, biphenyl, fluorenyl, and anthracenyl. Among them, phenyl is preferred.

As the (5) aliphatic hydrocarbon-substituted aromatic hydrocarbon group, an alkyl-substituted phenyl group is preferable, and the number of carbon atoms thereof is preferably 7 to 30, and particularly preferably 7 to 20. Specific examples include tolyl, xylyl, Base etc.

As the (6) aromatic hydrocarbon-substituted aliphatic hydrocarbon group, an aralkyl group is preferable, and the number of carbon atoms thereof is preferably 7 to 30, and particularly preferably 7 to 20. Specific examples include benzyl and phenethyl.

The alkyl group in this specification may be linear or branched.

Among these, as the hydrocarbon group forming the skeleton of the halogenated hydrocarbon group, (1) an aliphatic hydrocarbon group, (3) an alicyclic hydrocarbon-substituted aliphatic hydrocarbon group, (4) an aromatic hydrocarbon group, and (5) an aliphatic hydrocarbon-substituted aromatic group. Group hydrocarbon group or (6) aromatic hydrocarbon substituted aliphatic hydrocarbon group, more preferably alkyl group, alicyclic saturated hydrocarbon substituted alkyl group, phenyl group, alkyl substituted phenyl group, aralkyl group, particularly preferably alkyl group .

Moreover, in X, as a halogen atom in a halogenated hydrocarbon group, a fluorine atom is preferable from the viewpoint of heat resistance of a colorant, and this fluorine atom may replace a part or all of the hydrogen atom of a hydrocarbon group. It is considered that by selecting a fluorine atom as a substituent, a salt having a stronger ion-binding ability can be formed to improve heat resistance.

X may be a group having a linking group containing atoms other than carbon, hydrogen, or halogen atoms between the CC bonds of the halogenated hydrocarbon group, and may be a linking group containing atoms other than carbon, hydrogen, or halogen atoms, and may be Examples include -O-, -S-, -CO-, -COO-, -CONH-, -SO ₂ -and the like. The number of carbon atoms in lines 5 to 26 on page 6 refers to the total number of carbon atoms in the portion other than the carbon atoms constituting the linking group.

In the present invention, from the viewpoint of the heat resistance of the colorant, X is preferably a halogenated hydrocarbon group or a group having a linking group containing an atom other than a carbon atom, a hydrogen atom, or a halogen atom between CC bonds of the halogenated hydrocarbon group. The group is more preferably a group represented by the following formula (3) or (4), and particularly preferably a group represented by the following formula (3) that forms a conjugated amidine of an organic acid having a stronger acidity.

[In formula (3), R ²⁰ represents a hydrogen atom, a fluorine atom, an alkyl group, a fluoroalkyl group, an alicyclic hydrocarbon group, an alkoxy group, a fluoroalkoxy group, R ²¹ COOR ²² -or R ²³ COOR ²⁴ CFH-, R ²¹ and R ²³ independently represent an alkyl group, an alicyclic hydrocarbon group, a heteroaryl group or a substituted or unsubstituted aryl group, R ²² and R ²⁴ independently represent an alkanediyl group, and q represents 1 or more Integer, "*" indicates the binding site. ]

[In the formula (4), R ²⁵ to R ²⁹ each independently represent a hydrogen atom, a fluorine atom, a hydroxyl group, an alkyl group, a fluoroalkyl group, or an alkoxy group, and "*" represents a binding site.

Among them, at least one of R ²⁵ to R ²⁹ is a fluorine atom or a fluoroalkyl group. ]

In the formula (3), the alkyl group in R ²⁰ is preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 8 carbon atoms, and even more preferably a carbon atom. It is a 1-4 alkyl group. In addition, the alkyl group may be linear or branched. Specific examples include the same alkyl groups as described above.

The fluoroalkyl group in R ²⁰ is preferably a fluoroalkyl group having 1 to 20 carbon atoms, more preferably a fluoroalkyl group having 1 to 8 carbon atoms, and even more preferably 1 carbon atom. ~ 4 Fluoroalkyl. In addition, the fluoroalkyl group may be linear or branched. Specific examples include a fluoroalkyl group in which a part or all of the hydrogen atom of the alkyl group is replaced with a fluorine atom, and a perfluoroalkyl group is particularly preferred.

The alicyclic hydrocarbon group in R ²⁰ may be a 2 to 4 ring crosslinked alicyclic hydrocarbon group. The alicyclic hydrocarbon group is preferably an alicyclic saturated hydrocarbon group having 3 to 20 carbon atoms, and more preferably an alicyclic saturated hydrocarbon group having 3 to 12 carbon atoms. Specific examples include the same alicyclic saturated hydrocarbon groups as described above.

The alkoxy group in R ²⁰ is preferably an alkoxy group having 1 to 10 carbon atoms, more preferably an alkoxy group having 1 to 8 carbon atoms, and even more preferably 1 to 4 carbon atoms. Alkoxy. In addition, the alkoxy group may be linear or branched. Specific examples include methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, tertiary butoxy, secondary butoxy, n-pentyloxy, and isopentyloxy. Group, n-hexyloxy, methoxymethoxy, ethoxyethoxy, 3- (isopropoxy) propoxy and the like.

The fluoroalkoxy group in R ²⁰ is preferably a fluoroalkoxy group having 1 to 10 carbon atoms, more preferably a fluoroalkoxy group having 1 to 6 carbon atoms, and even more preferably It is a fluoroalkoxy group having 1 to 4 carbon atoms. In addition, the fluoroalkoxy group may be linear or branched. Specific examples include a fluoroalkoxy group in which a part or all of the hydrogen atom of the alkoxy group is substituted with a fluorine atom, and a perfluoroalkoxy group is particularly preferred.

In R ²¹ COOR ^22- , R ²³ COOR ²⁴ CFH- in R ²⁰ , R ²¹ and R ²³ independently of each other represent an alkyl group, an alicyclic hydrocarbon group, a heteroaryl group, or a substituted or unsubstituted aryl group, an alkyl group The number of carbon atoms of the alkyl group is preferably 1 to 12, and more preferably 1 to 8. Specific examples include the same alkyl groups as described above. In addition, the alicyclic hydrocarbon group may be a crosslinked alicyclic hydrocarbon group having 2 to 4 rings, preferably an alicyclic saturated hydrocarbon group having 3 to 20 carbon atoms, and more preferably an alicyclic type having 3 to 12 carbon atoms. Saturated hydrocarbyl. The heteroaryl group is preferably a 5- to 10-membered aromatic heterocyclic ring containing one or more heteroatoms selected from a nitrogen atom, an oxygen atom, and a sulfur atom. Specific examples include furyl, thienyl, pyrrolyl, Oxazolyl, pyridyl, quinolinyl, carbazolyl, and the like. The aryl group is preferably an aryl group having 6 to 14 carbon atoms, more preferably an aryl group having 6 to 10 carbon atoms, and particularly preferably a phenyl group. Examples of the substituent of the aryl group include an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a halogen atom, or a trifluoromethyl group. The position and number of the substituents are arbitrary. When there are two or more substituents, the substituents may be the same or different.

In addition, R ²² and R ²⁴ independently represent an alkanediyl group, and are preferably a linear or branched alkanediyl group having 1 to 10 carbon atoms. Specific examples include methylene, ethylene, ethane-1,1-diyl, propane-1,1-diyl, propane-1,2-diyl, and propane-1,3-di Base, propane-2,2-diyl, butane-1,2-diyl, butane-1,3-diyl, butane-1,4-diyl, pentane-1,4-diyl , Pentane-1,5-diyl, hexane-1,5-diyl, hexane-1,6-diyl, octane-1,8-diyl, decane-1,10-diyl Wait. Among them, an alkanediyl group having 2 to 6 carbon atoms is preferred, and an alkanediyl group having 2 to 4 carbon atoms is more preferred. Among these, from the viewpoint of ease of production, ethylene is preferred.

The upper limit of q is preferably 10, and more preferably 8.

R ^{20 is} preferably a fluorine atom, a fluoroalkyl group, an alicyclic hydrocarbon group, a fluoroalkoxy group, R ²¹ COOR ²² -or R ²³ COOR ²⁴ CFH-, and particularly preferably a fluorine atom or an alicyclic hydrocarbon group. , Perfluoroalkoxy, R ²¹ COOCH ₂ CH ₂ -or R ²³ COOCH ₂ CH ₂ CFH-.

Further, in the formula (4), examples of R ²⁵ ~ R ²⁹ is alkyl, fluoroalkyl and alkoxy, the alkyl group R may be employed in the above-described formula (3) ^20, and a fluoroalkyl group The alkoxy group has the same structure. Among them, at least one of R ²⁵ to R ²⁹ is a fluorine atom or a fluoroalkyl group, and preferably at least three of R ²⁵ to R ²⁹ are a fluorine atom or a fluoroalkyl group.

Examples of the divalent organic group in Y include a divalent hydrocarbon group, a group obtained by combining a divalent hydrocarbon group with a linking group containing an atom other than a carbon atom and a hydrogen atom, or hydrogen of these groups. A group in which a part of an atom is replaced by a halogen atom. Examples of such an organic group include an alkanediyl group having 1 to 10 carbon atoms, an arylene group having 6 to 20 carbon atoms, an arylene group having 7 to 20 carbon atoms, or a combination thereof. At least one selected from alkanediyl groups having 1 to 10 carbon atoms and arylene groups having 6 to 20 carbon atoms and is selected from -O-, -S-, -COO-, -CONR '-(R' A group consisting of at least one of a hydrogen atom or an alkyl group having 1 to 8 carbon atoms) and -SO _2- .

Specific examples of the alkanediyl group include the same alkanediyl groups as described above. Among these, an alkanediyl group having 2 to 8 carbon atoms is preferred, and an alkanediyl group having 2 to 6 carbon atoms is more preferred.

Examples of the arylene group include a phenylene group, a naphthylene group, a biphenylene group, and an anthryl group. Among them, arylene having 6 to 10 carbon atoms is preferred, and phenylene is particularly preferred.

The arylene alkanediyl group refers to a divalent group formed by combining an arylene group and an alkanediyl group. As the aralkylene diyl group, from the viewpoint of ease of obtaining and producing raw materials, the aralkylene diyl group having 7 to 15 carbon atoms is preferable, and the arylene alkyl group having 7 to 13 carbon atoms is more preferable. Alkanediyl. Specific examples include phenylene methylene, phenylene dimethylene, phenylene trimethylene, phenylene tetramethylene, phenylene pentamethylene, and phenylene hexamethylene Methylene isenephenyl C _1-6 alkyldiyl. In addition, there are ortho, meta, and para isomers in the arylene diyl group. From the viewpoint of less steric hindrance, the para is preferred.

In addition, at least one selected from the group consisting of an alkanediyl group having 1 to 10 carbon atoms and an arylene group having 6 to 20 carbon atoms and a member selected from the group consisting of -O-, -S-, -COO-, -CONR ' -(R 'represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms) and -SO ₂ -is at least one selected from the group consisting of an alkyldiyl group having 1 to 10 carbon atoms in combination A group consisting of at least one type of arylene group having 6 to 20 carbon atoms and at least one type selected from -O-, -COO-, and -SO _2- , more preferably selected from a combination of carbon atoms A group consisting of at least one of an alkanediyl group having 1 to 10 carbon atoms and an arylene group having 6 to 20 carbon atoms and at least one selected from the group consisting of -O- and -SO _2- .

Next, Z ^{+ will} be described.

Z ⁺ represents a triarylmethane-based cationic chromophore represented by the following formula (2-1), a triarylmethane-based cationic chromophore represented by the following formula (2-2), methine Based cationic chromophore, azo based cationic chromophore, diarylmethane based cationic chromophore, quinone imine based cationic chromophore, anthraquinone based cationic chromophore , Phthalocyanine-based cationic chromophores, and At least one type of cationic chromophore in the system.

In addition, various resonance structures exist in the triarylmethane-based cationic chromophore represented by the formula (2-1) and the triarylmethane-based cationic chromophore represented by the formula (2-2). In this specification, When there is a resonance structure in the chromophore represented by each formula, it is the same as the chromophore represented by the formulas (2-1) and (2-2).

[In the formulae (2-1) and (2-2), R ¹ to R ⁶ and R ¹¹ to R ¹⁶ each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, and a substituted Or an unsubstituted cycloalkyl group having 3 to 8 carbon atoms, or a substituted or unsubstituted aryl group, R ⁷ to R ⁹ and R ¹⁷ to R ¹⁹ each independently represent an alkyl group having 1 to 8 carbon atoms or chlorine Atoms, l, m, s, t, and u independently represent integers from 0 to 4, and n represents an integer from 0 to 6.

Among them, l, m, and n are not 0 at the same time. ]

Specific examples of the alkyl group having 1 to 8 carbon atoms in R ¹ to R ⁹ and R ¹¹ to R ¹⁹ include the same alkyl groups as described above. Among them, an alkyl group having 1 to 4 carbon atoms is preferred, and a methyl group or an ethyl group is particularly preferred.

Specific examples of the cycloalkyl group having 3 to 8 carbon atoms in R ¹ to R ⁶ and R ¹¹ to R ¹⁶ include the same cycloalkyl groups as described above. Among them, a cycloalkyl group having 4 to 6 carbon atoms is preferred, and cyclohexyl is particularly preferred.

As the aryl group in R ¹ to R ⁶ and R ¹¹ to R ¹⁶ , an aryl group having 6 to 14 carbon atoms is preferred, and an aryl group having 6 to 10 carbon atoms is more preferred. Specific examples include the same aryl groups as described above, and among them, phenyl is preferred.

Examples of the substituents of the alkyl group, cycloalkyl group, and aryl group in R ¹ to R ⁶ and R ¹¹ to R ¹⁶ include an alkoxy group having 1 to 6 carbon atoms, a halogen atom, or a trifluoromethyl group and a cyano group. Group, cycloalkyl group and aryl group may be substituted with an alkyl group having 1 to 6 carbon atoms. Specific examples of these substituents include the same substituents as described above. In addition, the position and number of the substituents are arbitrary, and when there are two or more substituents, the substituents may be the same or different.

R ⁷ to R ⁹ and R ¹⁷ to R ^{19 are} preferably an alkyl group having 1 to 4 carbon atoms or a chlorine atom, more preferably an alkyl group having 1 to 4 carbon atoms, and particularly preferably a methyl group or an ethyl group. .

In the formula (2-1), l and m are preferably integers of 0 to 2, and n is preferably 0 or 1. However, l, m, and n are not 0 at the same time. Among them, the combination of l, m, and n is preferably a combination of l = 1, m = 0, n = 0, a combination of l = 0, m = 0, n = 1, l = 2, m = 0, Combination of n = 0, combination of l = 1, m = 1, n = 0, combination of l = 1, m = 1, n = 1, more preferably combination of l = 1, m = 0, n = 0 , L = 0, m = 0, n = 1 combination, l = 1, m = 1, n = 0 combination.

In formula (2-2), s is preferably an integer of 0 to 2, and t and u are preferably 0 or 1, and it is also preferable that one or more of s, t, and u are 1 to An integer of 4. Among them, the combination of s, t, and u is preferably a combination of s = 0, t = 0, u = 0, a combination of s = 1, t = 0, u = 0, s = 2, t = 0, The combination of u = 0, the combination of s = 1, t = 1, u = 0, the combination of s = 1, t = 1, u = 1, especially the combination of s = 0, t = 0, u = 0 , S = 1, t = 0, u = 0 combination, s = 1, t = 1, u = 0 combination.

Examples of the chromophore represented by the formula (2-1) or the chromophore represented by the formula (2-2) include a chromophore represented by the following compound group a and compound group b. It is preferably a chromophore a1, a2, a3, a4, a5, a6, b1, b2, b3, b4, b6, more preferably a2, a3, a4, a5, a6, b3, b4.

In addition to the above, examples of the triarylmethane-based cationic chromophore represented by the formula (2-1) include a chromophore described in Japanese Patent Application Laid-Open No. 2012-17425.

The methine-based chromophore is preferably a chromophore represented by the following formulae (5-1) to (5-3), and more preferably a chromophore represented by the following formula (5-1).

[In the formulae (5-1) to (5-3), R ³¹ represents a hydrogen atom or a halogen group, and R ³² , R ³³ , R ^34, and R ³⁵ each independently represent an alkyl group having ₁ to 6 carbon atoms R ³⁶ represents a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, and G represents -CH = CH-, -CH = CH-CH =, -CH = CH-NR ^37- (R ³⁷ represents a hydrogen atom or Alkyl group having 1 to 6 carbon atoms), -CH = N-NR ^37- (R ³⁷ is synonymous with the above) or -N = N-NR ^37- (R ³⁷ is synonymous with the above), R ^a represents a substituted or non-substituted Aromatic hydrocarbon group or substituted or unsubstituted heterocyclic group. ]

R ^{a is} preferably a group represented by the following formulae (5a) to (5h), and more preferably a group represented by the following formula (5b) or (5h).

[In the formulae (5a) to (5h), R ³⁸ and R ⁴⁵ independently of each other represent an alkyl group having 1 to 6 carbon atoms, R ³⁹ represents a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, and R ⁴⁰ , ^R42 , ^R43 , ^R44 , ^R47 , ^R48, and ^R49 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and ^R41 , ^R46, and ^R50 each independently represent a hydrogen atom , A halogen group, an alkoxy group having 1 to 6 carbon atoms, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a nitro group, a hydroxyl group, or a cyano group. ]

The alkyl group in R ³² to R ⁵⁰ is preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group or an ethyl group. Examples of the substituent of the alkyl group include a halogen group, a cyano group, and a hydroxyl group. The halogen groups in R ³¹ , R ⁴¹ , R ^46, and R ⁵⁰ are preferably alkoxy groups having 1 to 4 carbon atoms as the alkoxy group in R ⁴¹ , R ^46, and R ⁵⁰ , and ^more preferably Is methoxy or ethoxy.

As a representative example of the chromophore represented by the said formula (5-1)-(5-3), the chromophore represented by the following compound group c is mentioned, for example.

Examples of the azo-based chromophore include chromophores represented by the following formulae (6-1) to (6-6), and preferably represented by the following formulae (6-1) to (6-5) The chromophore is more preferably a chromophore represented by the following formula (6-1).

[In the formulae (6-1) to (6-6), R ⁵¹ , R ⁵² , R ⁵³ , R ⁵⁴ , R ^55, and R ⁵⁷ each independently represent a substituted or unsubstituted alkane having 1 to 6 carbon atoms R ⁵⁶ and R ⁶⁰ each independently represent a hydrogen atom, a halogen group, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a nitro group, a hydroxyl group, or a cyano group, and R ⁵⁸ represents An alkyl group having 1 to 6 carbon atoms, R ⁵⁹ represents a group forming a quaternary ammonium, and R ^b represents a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted heterocyclic group. ]

R ^{59 is} preferably -NR ⁶¹ C _ma H _2ma N ⁺ R ⁶² R ⁶³ R ⁶⁴ (ma is an integer of 1 to 5, R ⁶¹ represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R ⁶² , R ⁶³ and R ⁶⁴ each independently represent an alkyl group having 1 to 6 carbon atoms), _{-COC ma} H _2ma N ⁺ R ⁶² R ⁶³ R ⁶⁴ (ma, R ⁶² , R ^63, and R ⁶⁴ have the same meanings as above),- C _ma H _2ma N ⁺ (NH ₂ ) R ⁷⁴ R ⁷⁵ (ma is synonymous with the above, R ⁷⁴ and R ⁷⁵ each independently represent an alkyl group having 1 to 6 carbon atoms), or the following formula (6-i) or (6-ii).

[In formulae (6-i) and (6-ii), R ⁶¹ and ma have the same meanings as described above. ]

R ^{b is} preferably a group represented by the following formulae (6a) to (6e), a substituted or unsubstituted phenyl group, and more preferably a group represented by the following formula (6a). Examples of the substituent of the phenyl group include a halogen group, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a hydroxyl group, a cyano group, and a nitro group.

[In the formulae (6a) to (6d), R ⁶⁵ represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a phenyl group, or a benzyl group, and R ⁶⁶ represents a hydrogen atom or a substituted or unsubstituted carbon atom having 1 to 6 6 alkyl groups, R ⁶⁷ represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a phenyl group, R ⁶⁸ represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and R ⁶⁹ represents a hydrogen atom or 1 carbon atom. ~ 6 alkyl groups, R ⁷⁰ ~ R ⁷³ each independently represent a hydrogen atom, a halogen group, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a nitro group, a hydroxyl group, or a cyano group . ]

The alkyl group in R ⁵¹ to R ⁵⁸ and R ⁶⁰ to R ⁷⁵ is preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group or an ethyl group. Examples of the substituent of the alkyl group include a halogen group, a hydroxyl group, a cyano group, and a —CONH ₂ group.

As a typical example of the chromophore represented by the said formula (6-1)-(6-6), the chromophore represented by the following compound group d or compound group e is mentioned, for example.

The diaryl chromophore is preferably a chromophore represented by the following formula (7-1) or (7-2), and more preferably a chromophore represented by the following formula (7-2).

[In the formulae (7-1) and (7-2), R ⁸¹ , R ⁸² , R ⁸³ , R ⁸⁴ , R ⁸⁶ , R ⁸⁷ , R ^88, and R ⁸⁹ each independently represent a carbon number of 1 to 6 Alkyl, R ⁸⁵ , R 9 ⁰ and R ⁹¹ each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. ]

The alkyl group in R ⁸¹ to R ⁹¹ is preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group or an ethyl group.

As a representative example of the chromophore represented by the said formula (7-1)-(7-2), the chromophore represented by the following compound group f is mentioned, for example.

The quinone imine-based chromophore is preferably a chromophore represented by the following formulae (8-1) to (8-3), and more preferably the following formula (8-1) or (8-3) Represents a chromophore.

[In the formulae (8-1) to (8-3), R ¹⁰¹ , R ¹⁰² , R ¹⁰³ , R ¹⁰⁴ , R ¹⁰⁵ , R ¹⁰⁶ , R ¹⁰⁸ , R ¹⁰⁹ , R ¹¹⁰ , R ¹¹¹ , R ¹¹⁴ , R ¹¹⁵ , R ¹¹⁶ , R ^117, and R ¹¹⁸ each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a phenyl group, or a benzyl group, R ¹⁰⁷ and R ¹¹³ each independently represent an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 20 carbon atoms, and R ¹¹² represents -NR ¹¹⁹ R ¹²⁰ (R ¹¹⁹ and R ¹²⁰ independently represent substituted or unsubstituted Alkyl group having 1 to 6 carbon atoms), a hydroxyl group, a nitro group, or a cyano group, and Q represents an oxygen atom or a sulfur atom. ]

The alkyl group in R ¹⁰¹ to R ¹¹¹ and R ¹¹³ to R ¹²⁰ is preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group or an ethyl group. Examples of the substituent of the alkyl group include a halogen group, a hydroxyl group, and a cyano group. The aryl group having 6 to 20 carbon atoms in R ¹⁰⁷ and R ¹¹³ is preferably a phenyl group.

As a representative example of the chromophore represented by the said formula (8-1)-(8-3), the chromophore represented by the following compound group g is mentioned, for example.

The anthraquinone chromophore is preferably a chromophore represented by the following formula (9-1) or (9-2), and more preferably a chromophore represented by the following formula (9-1).

[In the formulae (9-1) and (9-2), R ¹³¹ , R ¹³⁵ and R ¹³⁶ each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted Substituted phenyl, R ¹³² , R ¹³³ , R ¹³⁴ , R ¹³⁸ , R ^139, and R ¹⁴⁰ each independently represent an alkyl group having 1 to 6 carbon atoms, and R ¹³⁷ represents a methylene group, or a substituted or unsubstituted elongation. alkyl. ]

The alkyl group in R ¹³¹ to R ¹³⁶ and R ¹³⁸ to R ¹⁴⁰ is preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group or an ethyl group. Examples of the substituent of the alkyl group include a halogen group, a hydroxyl group, and a cyano group. Examples of the substituent of the phenyl group include an alkyl group having 1 to 6 carbon atoms, a halogen group, a hydroxyl group, and a cyano group. Base etc.

The alkylene group is preferably an alkylene group having 2 to 4 carbon atoms, such as an ethylene group, a trimethylene group, a propylene group, or a tetramethylene group. Examples of the substituent include an alkylene group. Hydroxyl, cyano, or nitro.

As a representative example of the chromophore represented by the said formula (9-1) or (9-2), the chromophore represented by the following compound group h is mentioned, for example.

The phthalocyanine-based chromophore is preferably a chromophore represented by the following formula (10).

CuPC-T (10)

[In the formula (10), CuPc represents a copper phthalocyanine residue, and T represents a group represented by the following formula (10a) or (10b). ]

[In the formulae (10a) and (10b), R ¹⁵¹ , R ¹⁵² , R ¹⁵³ , R ¹⁵⁴ , R ¹⁵⁵ , R ¹⁵⁶ , R ^157, and R ¹⁵⁸ each independently represent a hydrogen atom and an alkane having 1 to 6 carbon atoms Group or phenyl, p ¹ independently represents an integer of 2 to 8, and mb independently represents an integer of 1 to 5. ]

As a typical example of the chromophore represented by the said Formula (10), the chromophore represented by the following compound group k is mentioned, for example.

As above The chromophore is preferably a chromophore represented by the following formula (11).

[In formula (11), R ¹⁷¹ , R ¹⁷² , R ^173, and R ¹⁷⁴ each independently represent a hydrogen atom, —R ^178, or an aromatic hydrocarbon group having 6 to 10 carbon atoms (wherein the aromatic hydrocarbon group contains The hydrogen atom can be replaced by a halogen atom, -R ¹⁷⁸ , -OH, -OR ¹⁷⁸ , -SO ₃ H, -SO ₃ M, -CO ₂ H, -CO ₂ R ¹⁷⁸ , -SO ₃ R ¹⁷⁸ , -SO ₂ NHR ¹⁷⁹ Or -SO ₂ NR ¹⁷⁹ R ¹⁸⁰ substituted); R ¹⁷⁵ and R ¹⁷⁶ independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms; R ¹⁷⁷ represents -SO ₃ H, -SO ₃ M, -CO ₂ H , -CO ₂ R ¹⁷⁸ , -SO ₃ R ¹⁷⁸ , -SO ₂ NHR ¹⁷⁹ or -SO ₂ NR ¹⁷⁹ R ¹⁸⁰ ; k represents an integer of 0 to 5, and when k is an integer of 2 or more, multiple R ¹⁷⁷ may be the same or Different; R ¹⁷⁸ represents a saturated hydrocarbon group having 1 to 10 carbon atoms (wherein the hydrogen atom contained in the saturated hydrocarbon group may be replaced by a halogen atom, and the methylene contained in the saturated hydrocarbon group may be an oxygen atom, a carbonyl group, or -NR ¹⁷⁸ -Substituted); R ¹⁷⁹ and R ¹⁸⁰ independently represent a chain alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 30 carbon atoms or -Z, or R ¹⁷⁹ and R ¹⁸⁰ are bonded to each other and Substituted or unsubstituted heterocycles having 1 to 10 carbon atoms Groups. The hydrogen atom contained in the alkyl group and the cycloalkyl group may be substituted with a hydroxyl group, a halogen atom, -Z, -CH = CH ₂ or -CH = CHR ¹⁷⁸ , and the methylene group contained in the alkyl group and the cycloalkyl group The group may be substituted with an oxygen atom, a carbonyl group, or -NR ^178- , and the hydrogen atom contained in the heterocyclic group may be substituted with -R ¹⁷⁸ , -OH, or -Z; M represents a sodium atom or a potassium atom; Z represents a carbon number of 6 An aromatic hydrocarbon group of ~ 10 or an aromatic heterocyclic group of 5 to 10 carbon atoms. The hydrogen atom contained in the aromatic hydrocarbon group and the aromatic heterocyclic group may be substituted with -OH, R ¹⁷⁸ , -OR ¹⁷⁸ , -NO ₂ , -CH = CH ₂ , -CH = CHR ^178, or a halogen atom. ]

The saturated hydrocarbon group in R ¹⁷⁸ may be a saturated hydrocarbon group having 1 to 10 carbon atoms, may be any of linear, branched, and cyclic, and may have a crosslinked structure. Specifically, in addition to the same alkyl group as R ⁴ in the formula (2), nonyl, decyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, and tricyclodecyl base. Examples of the group in which a methylene group contained in a saturated hydrocarbon group is substituted with an oxygen atom include a methoxypropyl group, an ethoxypropyl group, a 2-ethylhexyloxypropyl group, and a methoxyhexyl group.

^Examples of substituted or unsubstituted heterocyclic groups having 1 to 10 carbon atoms formed by bonding R ¹⁷⁹ and R ^{180 to} each other include pyrrole, pyridine, indole, isoindole, quinoline, isoquinoline, and carbon Azole, morphine, acridine, furan, pyran, isobenzofuran, iso Limonene, , Thiophene, thioanthracene, phen Thiophene Wait. Examples of the substituent in the heterocyclic group include a halogen group, a hydroxyl group, an alkoxy group, an amine group, and an alkyl group. Examples of the aromatic heterocyclic group having 5 to 10 carbon atoms in Z include furyl, thienyl, pyridyl, pyrrolyl, Oxazolyl, iso Oxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, pyrimidinyl and the like.

Examples of the aromatic hydrocarbon group in R ¹⁷¹ , R ¹⁷² , R ¹⁷³ , R ^174, and Z include a phenyl group and a naphthyl group.

^Examples of -SO ₃ R ¹⁷⁸ among R ¹⁷¹ , R ¹⁷² , R ¹⁷³ , R ^174, and R ¹⁷⁷ include methylsulfonyl, ethylsulfonyl, hexanesulfonyl, and decylsulfonyl. Examples of -CO ₂ R ¹⁷⁸ include methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl, isopropoxycarbonyl, butoxycarbonyl, cyclohexyloxycarbonyl, and methoxypropoxycarbonyl. Further, as _{^{-SO 2 NHR 179, -SO 2 NR}} 179 R 180 is R ^179, R ^180, preferably an alkyl group, carbon atoms and branched chain carbon atoms, alicyclic 6-8 5-7 Formula hydrocarbon group, allyl group, aralkyl group having 8 to 10 carbon atoms, hydroxy-containing alkyl group having 2 to 8 carbon atoms, alkoxy group-containing alkyl group and aryl group having 2 to 8 carbon atoms.

As R ¹⁷¹ , R ¹⁷² , R ^173, and R ¹⁷⁴ , an alkyl group having 1 to 6 carbon atoms is preferred, an alkyl group having 1 to 4 carbon atoms is more preferred, and a methyl group or ethyl group is further more preferred. .

As R ¹⁷⁵ and R ¹⁷⁶ , a hydrogen atom or an alkyl group having 1 to 6 carbon atoms is preferable, and the alkyl group has 1 to 4 carbon atoms, and more preferably a methyl group or an ethyl group.

R ^{177 is} preferably -SO ₃ H, -SO ₃ M, -CO ₂ H, or -CO ₂ R ¹⁷⁸ , and more preferably -CO ₂ H or -CO ₂ R ¹⁷⁸ . -CO ₂ R ¹⁷⁸ is R ¹⁷⁸ is preferably an alkyl group having a carbon number of 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 4, further more preferably methyl or ethyl.

k is preferably 1 or 2, and more preferably 1.

As a typical example of the cation represented by the said Formula (11), the cation represented by a following formula is mentioned, for example.

Among them, from the viewpoint of heat resistance, as the Z ⁺ , a triarylmethane-based cationic chromophore represented by the formula (2-1) and a triarylmethane-based cationicity represented by the formula (2-2) are preferred. Chromophore, methine cationic chromophore, azo cationic chromophore, diarylmethane cationic chromophore, quinoneimine cationic chromophore, Based cationic chromophore, more preferably a triarylmethane-based cationic chromophore represented by formula (2-1), a triarylmethane-based cationic chromophore represented by formula (2-2), Methyl-based cationic chromophore, Is a cationic chromophore.

The reason why the heat resistance differs depending on the type and structure of the chromophore has not yet been determined. The present inventors believe that since a chromophore having a resonance structure interacts with a structural unit represented by formula (1), it is easily stabilized and heat resistance is improved.

The colorant may have a structural unit other than the structural unit represented by the formula (1) (hereinafter also referred to as "other structural unit"). As an example of such a structural unit, for example, it may be derived from a compound having one or more carboxyl groups. Structural unit of ethylenically unsaturated monomer, structural unit derived from N-position substituted maleimide, structural unit derived from aromatic vinyl compound, structural unit derived from (meth) acrylate, vinyl derived A structural unit of an ether, a structural unit derived from a macromonomer having a mono (meth) acrylfluorene group at a terminal of a polymer molecular chain, and the like.

The aforementioned structural unit derived from an ethylenically unsaturated monomer having one or more carboxyl groups can be obtained from an ethylenically unsaturated monomer having a carboxyl group, for example, (meth) acrylic acid, maleic acid, maleic anhydride, Mono [2- (meth) acryloxyethyl] succinate, ω -carboxy polycaprolactone mono (meth) acrylate, and p-vinylbenzoic acid.

In addition, the structural unit derived from the N-substituted maleimidine can be obtained from the N-substituted maleimide, for example, N-phenylmaleimide, N-cyclohexylmaleimide Imine.

The structural unit derived from an aromatic vinyl compound can be obtained from an aromatic vinyl compound such as styrene, α -methylstyrene, p-hydroxystyrene, p-hydroxy- α -methylstyrene, P-Vinyl benzyl glycidyl ether, vinylnaphthalene.

In addition, the structural unit derived from (meth) acrylate can be obtained from (meth) acrylate such as methyl (meth) acrylate, n-butyl (meth) acrylate, and (meth) acrylic acid 2 -Ethylhexyl ester, 2-hydroxyethyl (meth) acrylate, allyl (meth) acrylate, benzyl (meth) acrylate, polyethylene glycol (degree of polymerization 2 to 10) methyl ether (methyl ) Acrylate, polypropylene glycol (polymerization degree 2 ~ 10) methyl ether (meth) acrylate, polyethylene glycol (polymerization degree 2 ~ 10) mono (meth) acrylate, polypropylene glycol (polymerization degree 2 ~ 10) Mono (meth) acrylate, cyclohexyl (meth) acrylate, isoamyl (meth) acrylate, tricyclic (meth) acrylate [5.2.1.0 ^2,6 ] dec-8-yl ester, (formyl (Diyl) dicyclopentenyl acrylate, glycerol mono (meth) acrylate, 4-hydroxyphenyl (meth) acrylate, p-anisylphenol-modified ethylene oxide (meth) acrylate, (meth) ) Glycidyl acrylate, 3,4-epoxycyclohexyl methyl (meth) acrylate, 3-[(meth) acrylic acid oxomethyl] oxetane, 3-[(meth) acrylic acid Oxymethyl] -3-ethyloxetane.

In addition, the structural unit derived from vinyl ether can be obtained from the following vinyl ethers, for example, cyclohexyl vinyl ether, isofluorenyl vinyl ether, tricyclic [5.2.1.02,6] dec-8-yl vinyl group Ether, pentacyclopentadecyl vinyl ether, 3- (vinyloxymethyl) -3-ethyloxetane.

In addition, the structural unit derived from a macromonomer having a mono (meth) acrylfluorene group at the end of a polymer molecular chain can be composed of a macromer having a mono (meth) acrylfluorene group at the end of a polymer molecular chain as follows Molecular monomers are obtained, for example, polystyrene, polymethyl (meth) acrylate, poly-n-butyl (meth) acrylate, polysiloxane.

Among these, from the viewpoint of dispersibility, the colorant preferably has a structural unit derived from a (meth) acrylate as another structural unit, and more preferably has a structural unit derived from an alkyl (meth) acrylate.

When this colorant has another structural unit, from the viewpoint of dispersibility, the copolymerization ratio of the other structural units is preferably as follows.

That is, the proportion p of the structural unit represented by the formula (1) in all the structural units of the colorant and the ratio r of the other structural units are measured in mole ratios, preferably p / r = 1 / 0.5 to 1/19 , More preferably p / r = 1 / 1.5 ~ 1/9, and even more preferably p / r = 1/2 ~ 1/7.

The polystyrene-equivalent weight average molecular weight (Mw) of the colorant measured by a gel permeation chromatography (hereinafter abbreviated as GPC) (eluting solvent: tetrahydrofuran) is usually 1,000 to 100,000, preferably 3,000 to 50,000. . By adopting this method, it is possible to improve heat resistance, film characteristics, electrical characteristics, pattern shape, and resolution.

The ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the colorant of the present invention is preferably 1.0 to 5.0, and more preferably 1.0 to 3.0. The Mn referred to herein is a polystyrene-equivalent number average molecular weight measured by GPC (eluting solvent: tetrahydrofuran).

This colorant can be manufactured by a well-known method, for example, it can be manufactured by the method similar to the Example of Unexamined-Japanese-Patent No. 2012-194466. The colorant thus obtained is soluble in various organic solvents typified by propylene glycol monomethyl ether acetate and the like, and has excellent solvent resistance.

In the present invention, the colorant can be used alone or in combination of two or more.

The coloring composition of the present invention may further contain another coloring agent as the (A) coloring agent. At this time, the content of the colorant is preferably 0.1 to 99% by mass, more preferably 1 to 80% by mass, still more preferably 10 to 70% by mass, and particularly preferably 20 to 60% by mass in all the colorants. %.

Other colorants are not particularly limited, and colors and materials can be appropriately selected according to the application. Pigments, dyes, and natural pigments other than the colorant can also be used. It is preferable in the sense of obtaining pixels with high brightness and color purity. Organic pigments, organic dyes, and more preferably organic pigments.

Examples of the organic pigment include compounds classified as pigments in the color index (issued by The Society of Dyers and Colourists). Among them, preferred are Japanese Patent Laid-Open No. 2001-081348 and Japanese Patent No. Japanese Patent Application Publication No. 2010-026334, Japanese Patent Application Publication No. 2010-191304, Japanese Patent Application Publication No. 2010-237384, Japanese Patent Application Publication No. 2010-237569, Japanese Patent Application Publication No. 2011-006602, Japanese Patent Application Publication No. 2011-145346 Lake pigments, CI Pigment Red 166, CI Pigment Red 177, CI Pigment Red 224, CI Pigment Red 242, CI Pigment Red 254, CI Pigment Green 7, CI Pigment Green 36, CI Pigment Green 58, CI Pigment Blue 15: 6, CI Pigment Blue 80, CI Pigment Yellow 83, CI Pigment Yellow 138, CI Pigment Yellow 139, CI Pigment Yellow 150, CI Pigment Yellow 180, CI Pigment Yellow 211, CI Pigment Orange 38, CI Pigment Purple 23 Organic pigments other than lake pigments. Among the lake pigments, triarylmethane-based lake pigments, Based lake pigments and azo based lake pigments, more preferably triarylmethane based lake pigments and Department of lake pigments.

In the present invention, when another coloring agent is used as the pigment, the pigment may be used after being purified by a recrystallization method, a reprecipitation method, a solvent washing method, a sublimation method, a vacuum heating method, or a combination thereof. In addition, if necessary, the surface of the pigment particles may be modified with a resin and used. Examples of the resin that modifies the surface of the pigment particles include a vehicle resin described in Japanese Patent Application Laid-Open No. 2001-108817, and various commercially available resins for dispersing pigments. As a resin coating method on the surface of carbon black, for example, the methods described in Japanese Patent Application Laid-Open No. 9-71733, Japanese Patent Application Laid-Open No. 9-95625, Japanese Patent Application Laid-Open No. 9-124969, and the like can be used. An organic pigment can be used by miniaturizing primary particles by a so-called salt mill. As a method of salt milling, for example, the method disclosed in Japanese Patent Application Laid-Open No. 08-179111 can be adopted.

In the present invention, when a pigment is used as another coloring agent, a known dispersant and a dispersing aid may be further contained. Examples of the known dispersant include a urethane-based dispersant, a polyethyleneimine-based dispersant, a polyoxyethylene alkyl ether-based dispersant, a polyoxyethylene alkylphenyl ether-based dispersant, and a polydisperse. A glycol diester-based dispersant, a sorbitan fatty acid ester-based dispersant, a polyester-based dispersant, an acrylic-based dispersant, and the like; examples of the dispersion aid include pigment derivatives.

Such dispersants are commercially available, and examples of the acrylic dispersants include Disperbyk-2000, Disperbyk-2001, BYK-LPN6919, BYK-LPN21116, BYK-LPN21324 (the above is BYK-Chemie (BYK) Corporation) Manufactured), and as the urethane-based dispersant, Disperbyk-161, Disperbyk-162, Disperbyk-165, Disperbyk-167, Disperbyk-170, Disperbyk-182, Disperbyk-2164 (the above is BYK-Chemie (above) BYK), Solsperse 76500 (manufactured by Lubrizol Co., Ltd.), as the polyethyleneimine dispersant, Solsperse 24000 (manufactured by Lubrizol Co., Ltd.), and polyester dispersant, Adisper PB821, Adisper PB822, Adisper PB880, Adisper PB881 (the above are made by Ajinomoto Fine-Techno Co., Ltd.), etc.

Examples of the pigment derivative include copper phthalocyanine, diketopyrrolopyrrole, and a sulfonic acid derivative of quinophthalone.

In the present invention, other coloring agents may be used alone or in combination of two or more.

From the viewpoint of forming a pixel having improved heat resistance and solvent resistance, suppressed migration, high brightness, and high color purity, or a black matrix and black spacer with excellent light shielding properties, the content ratio of (A) the colorant is in the coloring composition. It is usually 5 to 70% by mass, and preferably 5 to 60% by mass. The solid content means a component other than the solvent mentioned later.

-(B) Binder resin-

The coloring composition of the present invention may contain a binder resin (but excluding polymers having a structural unit represented by the formula (1)). This makes it possible to improve the solubility of the tincture composition, the adhesion to the substrate, the storage stability, and the like. The binder resin is not particularly limited as long as it is not a polymer containing a structural unit represented by the formula (1), and a resin having an acidic functional group such as a carboxyl group or a phenolic hydroxyl group is preferred. Among these, a polymer having a carboxyl group (hereinafter referred to as a "carboxyl-containing polymer") is preferred, and examples thereof include an ethylenically unsaturated monomer having one or more carboxyl groups (hereinafter referred to as an "unsaturated monomer" (b1) ") and a copolymerizable copolymerizable ethylenically unsaturated monomer (hereinafter referred to as" unsaturated monomer (b2) ").

Examples of the unsaturated monomer (b1) are the same as those described above for the ethylenically unsaturated monomer having a carboxyl group. The unsaturated monomer (b1) can be used alone or in combination of two or more.

Examples of the unsaturated monomer (b2) include an N-substituted maleimide, an aromatic vinyl compound, a (meth) acrylate, a vinyl ether, and a terminal of a polymer molecular chain. As specific examples of the macromonomer having a mono (meth) acrylfluorenyl group, the same examples as described above can be cited. The unsaturated monomer (b2) can be used alone or in combination of two or more.

In the copolymer of the unsaturated monomer (b1) and the unsaturated monomer (b2), the copolymerization ratio of the unsaturated monomer (b1) in the copolymer is preferably 5 to 50% by mass, and more preferably 10 ~ 40% by mass. By copolymerizing the unsaturated monomer (b1) within such a range, a colored composition having excellent alkali developability and storage stability can be obtained.

Specific examples of the copolymer of the unsaturated monomer (b1) and the unsaturated monomer (b2) include, for example, Japanese Patent Laid-Open No. 7-140654, Japanese Patent Laid-Open No. 8-259876, and Japanese Patent Laid-Open No. 10 -31308, Japanese Patent Laid-Open No. 10-300922, Japanese Patent Laid-Open No. 11-174224, Japanese Patent Laid-Open No. 11-258415, Japanese Patent Laid-Open No. 2000-56118, Japanese Patent Laid-Open No. 2004-101728, etc. The copolymer disclosed in.

In addition, in the present invention, for example, Japanese Unexamined Patent Publication No. 5-19467, Japanese Unexamined Patent Publication No. 6-230212, Japanese Unexamined Patent Publication No. 7-207211, Japanese Unexamined Patent Publication No. 09-325494, and Japan A carboxyl group-containing polymer having a polymerizable unsaturated bond such as a (meth) acrylfluorenyl group in a side chain as disclosed in Japanese Patent Application Laid-Open No. 11-140144 and Japanese Patent Application Laid-Open No. 2008-181095 serves as a binder resin.

The polystyrene-equivalent weight-average molecular weight (Mw) measured by a gel permeation chromatography (hereinafter referred to as GPC) (eluting solvent: tetrahydrofuran) of the binder resin in the present invention is usually 1,000 to 100,000, preferably It is 3000 ~ 50,000. By adopting this method, heat resistance, film characteristics, electrical characteristics, pattern shape, and resolution can be improved.

The ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the binder resin in the present invention is preferably 1.0 to 5.0, and more preferably 1.0 to 3.0. The Mn referred to herein is a number average molecular weight in terms of polystyrene measured by GPC (eluting solvent: tetrahydrofuran).

The binder resin in the present invention can be produced by a known method, for example, a method disclosed in Japanese Patent Application Laid-Open No. 2003-222717, Japanese Patent Application Laid-Open No. 2006-259680, and International Publication No. 07/029871. , Control its structure, Mw, Mw / Mn.

In this invention, a binder resin can be used individually or in mixture of 2 or more types.

In the present invention, the content of the binder resin is usually 10 to 1,000 parts by mass, preferably 20 to 500 parts by mass, more preferably 50 to 350 parts by mass, and even more preferably 100 parts by mass of (A) the colorant. 100 ~ 250 parts by mass. By setting it as such, heat resistance, solvent resistance, alkaline developability, storage stability of a coloring composition, and chromaticity characteristics can be made favorable. In addition, transferability can be suppressed.

-(C) polymerizable compound-

The polymerizable compound in the present invention refers to a compound having two or more polymerizable groups. Examples of the polymerizable group include an ethylenically unsaturated group, an epoxyethyl group, an oxetanyl group, and an N-alkoxymethylamino group. In the present invention, as the polymerizable compound, a compound having two or more (meth) acrylfluorenyl groups or a compound having two or more N-alkoxymethylamino groups is preferable.

Specific examples of the compound having two or more (meth) acrylfluorenyl groups include polyfunctional (meth) acrylates obtained by reacting an aliphatic polyhydroxy compound with (meth) acrylic acid, and Lactone-modified polyfunctional (meth) acrylate, alkylene oxide-modified polyfunctional (meth) acrylate, polyfunctional obtained by reacting a (meth) acrylate having a hydroxyl group with a polyfunctional isocyanate A urethane (meth) acrylate, a polyfunctional (meth) acrylate having a carboxyl group, and the like obtained by reacting a (meth) acrylate having a hydroxyl group with an acid anhydride.

Here, as the above-mentioned aliphatic polyhydroxy compound, for example, a binary aliphatic polyhydroxy compound such as ethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycol, etc .; such as glycerol, trimethylolpropane, Trivalent or higher aliphatic polyhydroxy compounds such as neopentyl tetraol and dipentaerythritol. Examples of the (meth) acrylate having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, trimethylolpropane di (meth) acrylate, and neopentyl alcohol tri (meth) Acrylate, dipentaerythritol penta (meth) acrylate, glycerol dimethacrylate and the like. Examples of the polyfunctional isocyanate include toluene diisocyanate, hexamethylene diisocyanate, diphenylmethylene diisocyanate, isophorone diisocyanate, and the like. Examples of the acid anhydride include dibasic acid anhydrides such as succinic anhydride, maleic anhydride, glutaric anhydride, itaconic anhydride, phthalic anhydride, and hexahydrophthalic anhydride, such as pyromellitic acid. Tetracarboxylic dianhydrides such as formic dianhydride, biphenyltetracarboxylic dianhydride and benzophenone tetracarboxylic dianhydride.

Examples of the polyfunctional (meth) acrylate modified with caprolactone include compounds described in paragraphs [0015] to [0018] of Japanese Patent Application Laid-Open No. 11-44955. Examples of the polyfunctional (meth) acrylate modified with the alkylene oxide include bisphenol A di (meth) acrylate modified with at least one selected from the group consisting of ethylene oxide and propylene oxide. Isocyanuric acid tri (meth) acrylate modified with at least one kind selected from ethylene oxide and propylene oxide, and modified with at least one kind selected from ethylene oxide and propylene oxide Trimethylolpropane tri (meth) acrylate, neopentaerythritol tri (meth) acrylate modified with at least one selected from ethylene oxide and propylene oxide, and selected from epoxy At least one modified neopentaerythritol tetra (meth) acrylate of ethane and propylene oxide, and at least one modified dipentaerythritol selected from ethylene oxide and propylene oxide. Penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate modified with at least one selected from ethylene oxide and propylene oxide, and the like.

Examples of the compound having two or more N-alkoxymethylamine groups include compounds having a melamine structure, a benzoguanamine structure, and a urea structure. In addition, the melamine structure and the benzoguanamine structure mean that one or more Ring or phenyl substituted tri The chemical structure of a ring as a basic skeleton is also a concept including melamine, benzoguanamine, or a condensate thereof. Specific examples of the compound having two or more N-alkoxymethylamino groups include N, N, N ', N', N ", N" -hexa (alkoxymethyl) melamine, N , N, N ', N'-tetrakis (alkoxymethyl) benzoguanamine, N, N, N', N'-tetrakis (alkoxymethyl) glycol urea and the like.

Among these polymerizable compounds, polyfunctional (meth) acrylates obtained by reacting a ternary or higher aliphatic polyhydroxy compound with (meth) acrylic acid, and polyfunctional (formaldehyde) modified with caprolactone are preferred. Acrylate), polyfunctional urethane (meth) acrylate, polyfunctional (meth) acrylate with carboxyl group, N, N, N ', N', N ", N" -hexa (alkane) (Oxymethyl) melamine, N, N, N ', N'-tetrakis (alkoxymethyl) benzoguanamine. From the viewpoint that the strength of the colored layer is high, the surface smoothness of the colored layer is excellent, and the unexposed portion is less likely to generate scum and film residues on the substrate and the light-shielding layer, the ternary or higher aliphatic polyhydroxy compound and Among the polyfunctional (meth) acrylates obtained by the (meth) acrylic acid reaction, trimethylolpropane triacrylate, neopentaerythritol triacrylate, dinepentaerythritol pentaacrylate, and dinepentyl are particularly preferred. Tetraol hexaacrylate is particularly preferably a compound obtained by reacting neopentaerythritol triacrylate and succinic anhydride among polyfunctional (meth) acrylates having a carboxyl group, and dipentaerythritol pentaacrylate and amber A compound obtained by the reaction of an acid anhydride.

In the present invention, the (C) polymerizable compound may be used alone or in combination of two or more.

The content of the (C) polymerizable compound in the present invention is preferably 10 to 1,000 parts by mass, more preferably 20 to 700 parts by mass, and still more preferably 100 to 500 parts by mass, with respect to 100 parts by mass of the colorant (A). Particularly good is 200 to 400 parts by mass. By adopting this method, heat resistance, solvent resistance, curability, and alkali developability are improved. In addition, transferability can be suppressed.

-Photopolymerization initiator-

The coloring composition of the present invention may contain a photopolymerization initiator. This makes it possible to impart radiation-sensitive linearity to the colored composition. The photopolymerization initiator used in the present invention is a compound that generates active species that can initiate polymerization of a polymerizable polymer through exposure to radiation such as visible light, ultraviolet light, far ultraviolet light, electron beam, and X-rays.

Examples of such a photopolymerization initiator include oxygen and sulfur Compounds, acetophenone compounds, biimidazole compounds, three Compounds, O-hydrazine compounds, onium salt compounds, benzoin compounds, benzophenone compounds, α -diketone compounds, polycyclic quinone compounds, diazole compounds, pyrimidine Ester-based compounds and the like.

In this invention, a photoinitiator can be used individually or in mixture of 2 or more types. The photopolymerization initiator is preferably selected from oxygen and sulfur Compounds, acetophenone compounds, biimidazole compounds, three At least one of a system compound and an O-hydrazine system compound.

Among the photopolymerization initiators preferred in the present invention, as the oxygen and sulfur Specific examples of the system compounds include oxygen and sulfur 2-chlorooxysulfur 2-methyloxysulfur 2-isopropyloxysulfur 4-isopropyloxysulfur 2,4-dichlorooxysulfur 2,4-dimethyloxysulfur 2,4-diethyloxysulfur 2,4-diisopropyloxysulfur Wait.

In addition, as a specific example of the acetophenone-based compound, 2-methyl-1- [4- (methylthio) phenyl] -2- Porphyrin-1-one, 2-benzyl-2-dimethylamino-1- (4- Phenylphenyl) butane-1-one, 2- (4-methylbenzyl) -2- (dimethylamino) -1- (4- Phenylphenyl) butane-1-one and the like.

Moreover, as a specific example of the said biimidazole-based compound, 2,2'-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 and the like.

In addition, when using a biimidazole-based compound as a photopolymerization initiator, it is preferable to use a hydrogen donor in combination from the viewpoint that sensitivity can be improved. The "hydrogen donor" as used herein refers to a compound capable of supplying a hydrogen atom to a radical generated from a biimidazole-based compound by exposure. Examples of the hydrogen donor include 2-mercaptobenzothiazole and 2-mercaptobenzo Thiol-based hydrogen donors such as azole; amine-based hydrogen donors such as 4,4'-bis (dimethylamino) benzophenone and 4,4'-bis (diethylamino) benzophenone . In the present invention, the hydrogen precursor may be used alone or in combination of two or more. From the viewpoint of further improving the sensitivity, it is preferable to combine one or more thiol-based hydrogen precursors and one or more amine-based hydrogens. The body is used.

In addition, as the above three Specific examples of the system compounds include 2,4,6-tris (trichloromethyl) -mesanthine , 2-methyl-4,6-bis (trichloromethyl) -mesanthine , 2- [2- (5-methylfuran-2-yl) vinyl] -4,6-bis (trichloromethyl) -mesanthine , 2- [2- (furan-2-yl) vinyl] -4,6-bis (trichloromethyl) -mesanthine , 2- [2- (4-Diethylamino-2-methylphenyl) vinyl] -4,6-bis (trichloromethyl) -mesanthine , 2- [2- (3,4-dimethoxyphenyl) vinyl] -4,6-bis (trichloromethyl) -mesanthine , 2- (4-methoxyphenyl) -4,6-bis (trichloromethyl) -mesanthine , 2- (4-ethoxystyryl) -4,6-bis (trichloromethyl) -mesanthine , 2- (4-n-butoxyphenyl) -4,6-bis (trichloromethyl) -mesanthine Trihalide Department of compounds.

Further, as specific examples of the O-fluorenoxime-based compound, 1- [4- (phenylthio) phenyl] -1,2-octanedione 2- (O-benzidineoxime), 1 -[9-ethyl-6- (2-methylbenzylidene) -9H-carbazol-3-yl] -ethanone 1- (O-acetamoxime), 1- [9-ethyl- 6- (2-methyl-4-tetrahydrofurylmethoxybenzyl) -9H-carbazol-3-yl] -ethanone 1- (O-acetamoxime), 1- [9-ethyl -6- {2-methyl-4- (2,2-dimethyl-1,3-dioxolyl) methoxybenzyl} -9H-carbazol-3-yl] -ethyl Ketone 1- (O-acetamoxime) and the like. As a commercially available product of an O-hydrazine-based compound, NCI-831, NCI-930 (the above are manufactured by ADEKA Co., Ltd.), and the like can also be used.

In the present invention, when a photopolymerization initiator other than a biimidazole-based compound such as an acetophenone-based compound is used, a sensitizer may be used in combination. Examples of such a sensitizer include 4,4'-bis (dimethylamino) benzophenone, 4,4'-bis (diethylamino) benzophenone, 4- Diethylaminoacetophenone, 4-dimethylaminophenylacetone, ethyl 4-dimethylaminobenzoate, 2-ethylhexyl 4-dimethylaminobenzoate, 2,5 -Bis (4-diethylaminobenzylidene) cyclohexanone, 7-diethylamino-3- (4-diethylaminobenzyl) coumarin, 4- (diethyl Aminoamino) chalcone and the like.

In the present invention, the content of the photopolymerization initiator is preferably 0.01 to 120 parts by mass, and particularly preferably 1 to 100 parts by mass with respect to 100 parts by mass of the polymerizable compound. By adopting this method, heat resistance, solvent resistance, curability, and film characteristics can be made good. In addition, transferability can be suppressed.

-Solvent-

The coloring composition of the present invention contains the above-mentioned components (A) to (C) and other components added arbitrarily, and a solvent is usually prepared to prepare a liquid composition.

As the solvent, as long as the components (A) to (C) and other components constituting the coloring composition are dispersed or dissolved, and do not react with these components, and have appropriate volatility, they can be appropriately selected and used.

Examples of such solvents include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n-propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol monomethyl ether, and diethyl ether. Diethylene glycol monoethyl ether, diethylene glycol mono-n-propyl ether, diethylene glycol mono-n-butyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol mono-n-butyl ether Propylene ether, propylene glycol mono-n-butyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol mono-n-propyl ether, dipropylene glycol mono-n-butyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monoethyl ether, and other (poly) alkylene Glycol monoalkyl ethers; alkyl lactates such as methyl lactate and ethyl lactate; methanol, ethanol, propanol, butanol, isopropanol, isobutanol, tertiary butanol, octanol, 2- (Cyclo) alkyl alcohols such as ethylhexanol and cyclohexanol; keto alcohols such as diacetone alcohol; ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monomethyl Ether acetate, diethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, dipropylene glycol monomethyl ether acetate, acetic acid 3- (Poly) alkylene glycol monoalkyl ether acetates such as oxybutyl ester, 3-methyl-3-methoxybutyl acetate; diethylene glycol dimethyl ether, diethylene glycol methyl ether, Other ethers such as ethylene glycol diethyl ether, tetrahydrofuran; ketones such as methyl ethyl ketone, cyclohexanone, 2-heptanone, 3-heptanone; propylene glycol diacetate, 1,3-butanediol diacetate, Diacetates such as 1,6-hexanediol diacetate; methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, 3-ethyl Alkoxycarboxylic acid esters such as ethyl oxypropionate, ethyl ethoxyacetate, 3-methyl-3-methoxybutyl propionate; ethyl acetate, n-propyl acetate, isopropyl acetate Ester, n-butyl acetate, isobutyl acetate, n-amyl formate, isoamyl acetate, n-butyl propionate, ethyl butyrate, n-propyl butyrate, isopropyl butyrate, n-butyl butyrate , Methyl pyruvate, ethyl pyruvate, n-propyl pyruvate, methyl acetate, ethyl acetate, ethyl 2-oxobutyrate, and other esters; aromatic hydrocarbons such as toluene and xylene Class; N, N-dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone Amides Amides or the like.

Among these solvents, propylene glycol monomethyl ether, propylene glycol monoethyl ether, ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, and propylene glycol are preferred from the viewpoints of solubility, pigment dispersibility, and coatability. Monoethyl ether acetate, 3-methoxybutyl acetate, diethylene glycol dimethyl ether, diethylene glycol methyl ether, cyclohexanone, 2-heptanone, 3-heptanone, 1,3-butane Diethylene glycol diacetate, 1,6-hexanediol diacetate, ethyl lactate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, 3-ethoxypropionic acid Ethyl ester, 3-methyl-3-methoxybutyl propionate, n-butyl acetate, isobutyl acetate, n-amyl formate, isoamyl acetate, n-butyl propionate, ethyl butyrate, butyl Isopropyl ester, n-butyl butyrate, ethyl pyruvate and the like.

In this invention, a solvent can be used individually or in mixture of 2 or more types.

The content of the solvent is not particularly limited, and the total concentration of each component other than the solvent of the coloring composition is preferably an amount of 5 to 50% by mass, and more preferably an amount of 10 to 40% by mass. By using this method, a coloring agent dispersion liquid having good dispersibility and stability and a coloring composition having good coatability and stability can be obtained.

-Additives-

The coloring composition of this invention may contain various additives as needed.

Examples of the additives include fillers such as glass and alumina; polymer compounds such as polyvinyl alcohol and poly (fluoroalkyl acrylate); surfactants such as fluorine-based surfactants and silicon-based surfactants; Vinyltrimethoxysilane, vinyltriethoxysilane, vinyltri (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldi Methoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxy Silane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloropropylmethyldimethoxy Adhesion promoters such as silane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, and 3-mercaptopropyltrimethoxysilane; 2,2-thiobis ( 4-methyl-6-tertiary butylphenol), 2,6-ditertiary butylphenol and other antioxidants; 2- (3-tertiarybutyl-5-methyl-2-hydroxyphenyl)- UV absorbers such as 5-chlorobenzotriazole and alkoxybenzophenones; anti-flocculants such as sodium polyacrylate Coagulants; malonic acid, adipic acid, itaconic acid, citraconic acid, fumaric acid, mesaconic acid, 2-aminoethanol, 3-amino-1-propanol, 5-amino-1- Residue improvers such as pentanol, 3-amino-1,2-propanediol, 2-amino-1,3-propanediol, 4-amino-1,2-butanediol; succinic acid mono [2- (formaldehyde Improved developability such as propylene ethoxyethyl] acrylate, mono [2- (meth) acrylic ethoxy ethyl] phthalate, ω -carboxy polycaprolactone mono (meth) acrylate Agent.

[Colored hardened film and its forming method]

The coloring cured film of the present invention is formed using the coloring composition of the present invention, and specifically refers to pixels of each color, a black matrix, a black spacer, and the like used in a display element and a solid-state imaging element.

Hereinafter, a colored curing film used in a color filter constituting a display element and a solid-state imaging element and a method for forming the same will be described.

As a method of manufacturing a color filter, the following method is mentioned first. First, as needed, a light-shielding layer (black matrix) is formed on the surface of the substrate so that a portion where the pixels are formed is divided. Next, the substrate is coated with the liquid composition of the radiation-sensitive composition of the present invention, for example, blue, and then pre-baked to evaporate the solvent to form a coating film. Next, after exposing the coating film through a photomask, development is performed using an alkaline developer to dissolve and remove unexposed portions of the coating film. Thereafter, a pixel array in which blue pixel patterns are arranged in a predetermined arrangement is formed by post-baking.

Next, using each of the green or red radiation-sensitive coloring compositions, coating, pre-baking, exposure, development, and post-baking of each radiation-sensitive coloring composition are performed in the same manner as described above, and a green color is sequentially formed on the same substrate. Pixel array and red pixel array. Thereby, a color filter in which pixel arrays of three primary colors of red, green, and blue are arranged on the substrate is obtained. However, in the present invention, the order in which the pixels of each color are formed is not limited to the order described above.

The black matrix may be formed by using a photolithography method to form a thin metal film such as chromium formed by sputtering or vapor deposition into a desired pattern, or a radiation-sensitive coloring composition in which a black colorant is dispersed may be used. The above-mentioned pixels are formed in the same manner.

Examples of the substrate used when forming a color filter include glass, silicon, polycarbonate, polyester, aromatic polyamine, polyimide, polyimide, and the like.

In addition, these substrates may be previously subjected to appropriate pretreatments such as chemical reagent treatment using a silane coupling agent, plasma treatment, ion plating, sputtering, vapor phase reaction method, and vacuum evaporation, if necessary.

When applying a radiation-sensitive coloring composition to a substrate, an appropriate coating method such as a spray method, a roll coating method, a spin coating method, a slit die coating method (slit coating method), or a bar coating method may be used. Preferably, a spin coating method or a slit die coating method is used.

Pre-baking is usually performed by combining reduced pressure drying and heat drying. Drying under reduced pressure is usually performed until 50 to 200 Pa is reached. The conditions for heating and drying are usually about 1 to 10 minutes at 70 to 110 ° C.

The coating thickness is 0.6 to 8 μm , and preferably 1.2 to 5 μm , based on the film thickness after drying.

Examples of the radiation light source used when forming at least one selected from a pixel and a black matrix include a xenon lamp, a halogen lamp, a tungsten lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a metal halide lamp, and a medium voltage Lamp light sources such as mercury lamps and low-pressure mercury lamps, or laser light sources such as argon ion laser, YAG laser, XeCl excimer laser, nitrogen laser, etc. As an exposure light source, an ultraviolet LED can also be used. Radiation having a wavelength in the range of 190 to 450 nm is preferred.

The radiation exposure is generally preferably 10 to 10,000 J / m ² .

In addition, as the alkaline developing solution, for example, sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium hydroxide, tetramethylammonium hydroxide, choline, 1,8-diazabicyclo- [5.4 .0] -7-undecene, 1,5-diazabicyclo- [4.3.0] -5-nonene and other aqueous solutions.

An appropriate amount of a water-soluble organic solvent such as methanol, ethanol, or a surfactant may be added to the alkaline developer. In addition, after alkaline development, water washing is usually performed.

As the development processing method, a shower development method, a spray development method, a dip development method, a puddle development method, or the like can be used. The developing conditions are preferably 5 to 300 seconds at room temperature.

Post-baking conditions are usually about 10-60 minutes at 180-280 ° C.

The film thickness of the pixel thus formed is usually 0.5 to 5 μm , and preferably 1.0 to 3 μm .

In addition, as a second method of manufacturing a color filter, a method of obtaining pixels of each color by an inkjet method disclosed in Japanese Patent Application Laid-Open No. 7-318723, Japanese Patent Application Laid-Open No. 2000-310706, and the like can be adopted. In this method, first, a partition wall having a light shielding function is formed on the surface of the substrate. Next, a liquid composition such as a blue thermosetting colored composition is ejected into the formed partition wall by an inkjet device, and then pre-baking is performed to evaporate the solvent. Next, after exposing the coating film as necessary, it is cured by post-baking to form a blue pixel pattern.

Next, using each of the green or red thermosetting coloring compositions, a green pixel pattern and a red pixel pattern are sequentially formed on the same substrate in the same manner as described above. Thus, a color filter in which pixel patterns of three primary colors of red, green, and blue are arranged on the substrate is obtained. However, in the present invention, the order of forming the pixels of each color is not limited to the order described above.

In addition, the partition wall not only functions as a light-shielding function, but also functions to prevent color mixing of the coloring compositions ejected into the partition area from being mixed, so the film thickness is thicker than the black matrix used in the first method. Therefore, the partition wall is usually formed using a black radiation-sensitive composition.

The method and conditions of the substrate, the radiation light source, and the pre-baking and post-baking methods used in forming the color filter are the same as those in the first method. The film thickness of the pixel formed by the inkjet method is equal to the height of the partition wall.

If necessary, a protective film is formed on the pixel pattern thus obtained, and then a transparent conductive film is formed by sputtering. After the transparent conductive film is formed, a spacer may be further formed to form a color filter. The spacer is usually formed using a radiation-sensitive composition, and a spacer (black spacer) having a light-shielding property may be used. In this case, a radiation-sensitive coloring composition in which a black colorant is dispersed is used, but the coloring composition of the present invention is also suitable for forming the black spacer.

The radiation-sensitive coloring composition of the present invention is also suitable for forming a colored hardened film of any of the pixels, black matrices, black spacers, and the like used in the color filter.

The color filter including the colored hardened film of the present invention thus formed has extremely high brightness and color purity, and is therefore very useful for color liquid crystal display elements, color image pickup tube elements, color sensors, organic EL display elements, electronic paper, and the like. . In addition, a display element described later may be provided with at least one colored hardened film formed using the radiation-sensitive coloring composition of the present invention.

[Display element]

The display element of the present invention includes the colored cured film of the present invention. Examples of the display element include a color liquid crystal display element, an organic EL display element, and electronic paper.

The color liquid crystal display element provided with the colored hardened film of the present invention may be a transmissive type or a reflective type, and an appropriate structure may be adopted. For example, a structure in which a color filter is formed on a substrate different from a driving substrate on which a thin film transistor (TFT) is arranged, and the driving substrate and the substrate on which the color filter is formed are opposed to each other with a liquid crystal layer therebetween. Alternatively, a substrate on which a color filter is formed on a surface of a driving substrate on which a thin film transistor (TFT) is arranged, and an ITO (indium oxide doped with tin) electrode or an IZO (indium oxide and zinc oxide) may be used. The substrate of the electrode) has a structure in which the liquid crystal layer is opposed to each other. The latter structure can significantly increase the aperture ratio, and has the advantage that a bright and high-definition liquid crystal display element can be obtained. In the latter configuration, the black matrix and the black spacer may be formed on either the substrate side on which the color filter is formed and the substrate side on which the ITO electrode or IZO electrode is formed.

The color liquid crystal display element provided with the colored hardened film of the present invention includes a cold cathode fluorescent tube (CCFL: Cold Cathode Fluorescent Lamp) and a backlight unit using a white LED as a light source. Examples of the white LED include a white LED that combines red LEDs, green LEDs, and blue LEDs to obtain white light by mixing colors, and a white LED that combines white LEDs to obtain white light by mixing colors. ， Combining blue LED, red light-emitting phosphor and green light-emitting phosphor to obtain white light by mixing colors, and white light white LED by mixing blue LED and YAG-based phosphors, combining blue LED, orange light-emitting phosphor, and green light-emitting phosphor are mixed to obtain white light, and a combination of ultraviolet LED, red light-emitting phosphor, green light-emitting phosphor, and blue light-emitting phosphor are mixed to obtain white color. Light white LED and so on.

In the color liquid crystal display element having the colored hardened film of the present invention, a TN (Twisted Nematic) type, a STN (Super Twisted Nematic) type, and an IPS (In-Planes Switching) can be used. ) Type, VA (Vertical Alignment, vertical alignment) type, OCB (Optically Compensated Birefringence, optical compensation curved alignment) type and other appropriate liquid crystal modes.

The organic EL display element provided with the colored cured film of the present invention may have a suitable structure. For example, the structure disclosed in Japanese Patent Application Laid-Open No. 11-307242 may be mentioned.

Moreover, the electronic paper provided with the colored hardened film of this invention can take an appropriate structure, For example, the structure disclosed by Unexamined-Japanese-Patent No. 2007-41169 is mentioned.

    Examples    

Hereinafter, embodiments will be described in detail with reference to examples. However, the present invention is not limited to the following examples.

<Synthesis of colorant>

Synthesis Example 1

(Synthesis of polymer (1))

To a reaction vessel equipped with a condenser tube were added 5.46 g of p- (vinylphenyl) trifluoromethanesulfonyliminic acid triethylamine salt, 4.51 g of methyl methacrylate, 0.130 g of α -thioglycerin, and They are soluble in 20 g of cyclohexanone. The solution was heated to 100 ° C while stirring under a nitrogen stream. Stirred at the same temperature was added dropwise over 30 minutes under side so that 98.0mg of α, α '- azobisisobutyronitrile were dissolved in 10.4g of cyclohexanone was obtained and further stirring was continued at the same temperature for 3 hours after completion of dropping. After the reaction solution was cooled to room temperature, 60 g of acetone was added to make a homogeneous solution, and the solution was added dropwise to 1.1 L of hexane. The formed precipitate was collected by filtration and washed with hexane. The obtained solid was dried under reduced pressure at 50 ° C to obtain 8.14 g of a polymer represented by the following structural formula. The Mw of the obtained polymer was 7,800 and the Mn was 3,600. It was confirmed by ¹ H-NMR analysis that the ratio of p to r was 1 / 2.2 as a molar ratio (p / r). Let this be a polymer (1).

(Synthesis of Polymer A)

2.0 g of the above polymer (1) was dissolved in 40 mL of acetone. Next, as shown in the following flowchart, the molar ratio of the polymer (1) to the number of moles of the structural unit derived from the p- (vinylphenyl) trifluoromethanesulfinimide triethylamine salt was calculated. The molar amount of the compound (1) was added to the molar amount of the compound (1), and the mixture was stirred at room temperature for 1 hour. Thereafter, 200 mL of ion-exchanged water was added to the residue obtained by concentrating the reaction solution under reduced pressure, and the resulting precipitate was collected by filtration and washed with water. The obtained solid was dried under reduced pressure at 50 ° C to obtain 2.54 g of polymer A represented by the following structural formula. Polymer A corresponds to the present colorant.

Synthesis Example 2

(Synthesis of polymer (2))

In the synthesis of the polymer (1), p-styrenestyrenesulfonic acid tetraethylammonium salt was used instead of p- (vinylphenyl) trifluoromethanesulfonyliminic acid triethylamine salt. 1 Similarly, 8.29 g of a polymer (2) represented by the following structural formula was obtained. Mw of the obtained polymer (2) was 8,800 and Mn was 4,300. It was confirmed by ¹ H-NMR analysis that the ratio of p to r was 1 / 2.8 as a molar ratio (p / r).

(Synthesis of Polymer B)

In the synthesis of polymer A, except that the polymer (2) was used instead of the polymer (1) as shown in the following flow chart, 2.50 g of a polymer represented by the following structural formula was obtained in the same manner as in Synthesis Example 1.物 B。 Object B. Polymer B is not the present colorant.

Synthesis Example 3

(Synthesis of polymer (3))

To a reaction vessel equipped with a condenser, 4.55 g of p- (vinylphenyl) n-nonafluorobutanesulfinoimide triethylamine salt, 5.41 g of methyl methacrylate, 0.130 g of α -thioglycerin, and They were dissolved in 20 g of cyclohexanone. The solution was heated to 100 ° C while stirring under a nitrogen stream. Stirred at the same temperature was added dropwise over 30 minutes under side so that 98.0mg of α, α '- azobisisobutyronitrile were dissolved in 10.4g of cyclohexanone was obtained and further stirring was continued at the same temperature for 3 hours after completion of dropping. After the reaction solution was cooled to room temperature, 60 g of acetone was added to make a homogeneous solution, and the solution was added dropwise to 1.1 L of hexane. The formed precipitate was collected by filtration and washed with hexane. The obtained solid was dried under reduced pressure at 50 ° C to obtain 8.02 g of a polymer represented by the following structural formula. The Mw of the obtained polymer was 7,500 and the Mn was 3,300. It was confirmed by ¹ H-NMR analysis that the ratio of p to r was 1 / 2.6 as a molar ratio (p / r). Let this be a polymer (3).

(Synthesis of Polymer C)

In the synthesis of polymer A, as shown in the following flowchart, except that the polymer (3) was used instead of the polymer (1), 2.43 g of a polymer represented by the following structural formula was obtained in the same manner as in Synthesis Example 1.物 C。 C. Polymer C corresponds to the present colorant.

Synthesis Example 4

(Synthesis of polymer (4))

A reaction vessel equipped with a condenser was charged with 6.11 g of compound (2) shown below, 3.85 g of methyl methacrylate, and 0.130 g of α -thioglycerin, and dissolved them in 20 g of cyclohexanone. The solution was heated to 100 ° C while stirring under a nitrogen stream. Stirred at the same temperature was added dropwise over 30 minutes under side so that 98.0mg of α, α '- azobisisobutyronitrile were dissolved in 10.4g of cyclohexanone was obtained and further stirring was continued at the same temperature for 3 hours after completion of dropping. After the reaction solution was cooled to room temperature, 60 g of acetone was added to make a homogeneous solution, and the solution was added dropwise to 1.1 L of hexane. The formed precipitate was collected by filtration and washed with hexane. The obtained solid was dried under reduced pressure at 50 ° C to obtain 8.25 g of a polymer represented by the following structural formula. The obtained polymer had Mw of 8000 and Mn of 4100. It was confirmed by ¹ H-NMR analysis that the ratio of p to r was 1 / 1.9 in terms of mole ratio (p / r). Let this be a polymer (4).

(Synthesis of Polymer D)

In the synthesis of polymer A, 2.65 g was obtained in the same manner as in Synthesis Example 1 except that the polymer (4) and the compound (1) were used instead of the polymer (1) as shown in the following flowchart. Polymer D represented by the formula. Polymer D corresponds to the present colorant.

Synthesis example 5 ~ 15

(Synthesis of polymers E ~ O)

In the synthesis of polymer A, polymers E to O were obtained in the same manner as in Synthesis Example 1 except that the reaction was performed according to the combination of raw materials shown in Table 1. The polymers E to O all correspond to the colorant.

The structure of the compound assigned a C.I. number as a raw material is as follows.

Synthesis Example 16

In a 100 mL Erlenmeyer flask equipped with a stir bar, 5.21 g of the compound (1) represented by the following formula and 4.31 g of lithium bis (trifluoromethanesulfonyl) fluorenimide were added, and 50 mL of chloroform and 25 mL of ion-exchanged water were added to the chamber. Stir at warm for about 2 hours. Thereafter, the aqueous layer was separated and removed, and the organic layer was washed twice with ion-exchanged water. After the organic layer was concentrated under reduced pressure, the residue was dried under reduced pressure at 50 ° C. for 12 hours to obtain 7.42 g of a compound represented by the following structural formula. The obtained compound was used as dye A. Dye A is not the present colorant.

Preparation Examples 1 ~ 16

The obtained polymers A to O, dye A and propylene glycol monomethyl ether acetate were mixed according to Table 2 to prepare a polymer solution or a dye solution. In Table 2, propylene glycol monomethyl ether acetate is abbreviated as PGMEA.

Preparation Example 17

As a colorant, 15 parts by mass of CI Pigment Green 58 was used, and as a dispersant, 12.5 parts by mass (solid content concentration of 40% by mass) of BYK-LPN 21116 (manufactured by BYK-Chemie (BYK)) was used. As a solvent, 72.5 parts by mass were used. Parts of propylene glycol monomethyl ether acetate were treated with a bead mill to prepare a pigment dispersion liquid (a-1).

Production Example 18

As a colorant, 15 parts by mass of CI Pigment Yellow 138 was used, and as a dispersant, 12.5 parts by mass (solid content concentration of 40% by mass) BYK-LPN21116 (manufactured by BYK-Chemie (BYK)) was used. As a solvent, 72.5 parts by mass was used. Propylene glycol monomethyl ether acetate was treated with a bead mill to prepare a pigment dispersion liquid (a-2).

<Synthesis of Binder Resin>

Synthesis Example 17

A flask equipped with a condenser tube and a stirrer was charged with 100 parts by mass of propylene glycol monomethyl ether acetate and replaced with nitrogen. The mixture was heated to 80 ° C, and the following mixed solution was added dropwise at the same temperature over 1 hour. The mixed solution was 100 parts by mass of propylene glycol monomethyl ether acetate, 20 parts by mass of methacrylic acid, 10 parts by mass of styrene, and 5 parts by mass. Benzyl methacrylate, 15 parts by mass of 2-hydroxyethyl methacrylate, 23 parts by mass of 2-ethylhexyl methacrylate, 12 parts by mass of N-phenylmaleimide, 15 parts by mass of succinic acid mono A mixed solution of (2-propenyloxyethyl) ester and 6 parts by mass of 2,2'-azobis (2,4-dimethylvaleronitrile) was polymerized while maintaining the temperature for 2 hours. After that, the temperature of the reaction solution was raised to 100 ° C. and polymerized for 1 hour, thereby obtaining a binder resin solution (solid content concentration: 33% by mass). Mw of the obtained binder resin was 12,200 and Mn was 6,500. This adhesive resin is referred to as "adhesive resin (B1)".

[Preparation of coloring composition for evaluation of transferability]

Preparation Example 19

30.5 parts by mass of the pigment dispersion liquid (a-1) as the colorant (A) and 25.0 parts by mass of the pigment dispersion liquid (a-2), and 26.3 parts by mass of the binder resin (B1) solution as the (B) binder resin 9.9 parts by mass of a mixture of dinepentaerythritol hexaacrylate and dinepentaerythritol pentaacrylate ((C), manufactured by Nippon Kayaku Co., Ltd., trade name: KAYARAD DPHA) as a polymerizable compound, 2-benzyl-2-dimethylamino-1- (4- MEGAFAC F- as a fluorosurfactant 1.8 parts by mass, 1.8 parts by mass of N-phenyl) butane-1-one (trade name IRGACURE 369, manufactured by Ciba Specialty Chemicals), NCI-930 (manufactured by ADEKA Corporation) 554 (manufactured by DIC Corporation) and 0.05 parts by mass of propylene glycol monomethyl ether acetate as a solvent to prepare a green colored composition (G) having a solid content concentration of 20% by mass.

<Preparation and Evaluation of Coloring Composition>

Example 1

7.2 parts by mass of a polymer solution (A-1) as a colorant, 9.9 parts by mass of a binder resin (B1) solution as a (B) binder resin, and dioxin as a (C) polymerizable compound 15.4 parts by mass of a mixture of tetraol hexaacrylate and dipentaerythritol pentaacrylate (manufactured by Nippon Kayaku Co., Ltd., KAYARAD DPHA) as a photopolymerization initiator, 2-benzyl-2-dimethyl Aminoamino-1- (4- Phenylphenyl) butane-1-one (trade name IRGACURE 369, manufactured by Ciba Specialty Chemicals) 1.8 parts by mass, 0.1 part by mass of NCI-930 (manufactured by ADEKA Co., Ltd.), MEGAFAC F- 554 (manufactured by DIC Corporation) and 0.05 parts by mass of propylene glycol monomethyl ether acetate as a solvent to prepare a colored composition (S-1) having a solid content concentration of 20% by mass.

[Evaluation of heat resistance]

The coloring composition (S-1) was coated on a soda glass substrate having a SiO ₂ film preventing the elution of sodium ions using a spin coater, and then prebaked on a hot plate at 90 ° C for 2 minutes to form a film thickness of 2.5 μ m coating film.

Next, after the substrate was cooled to room temperature, each coating film was exposed to radiation including wavelengths of 365 nm, 405 nm, and 436 nm using a high-pressure mercury lamp through a photomask at an exposure amount of 400 J / m ² . Thereafter, a developing solution composed of a 0.04 mass% potassium hydroxide aqueous solution at 23 ° C. was sprayed onto these substrates at a development pressure of 1 kgf / cm ² (nozzle diameter 1 mm), and spray development was performed for 90 seconds. Thereafter, the substrate was washed with ultrapure water, air-dried, and then post-baked in a clean oven at 200 ° C. for 30 minutes to form a dot pattern on the substrate.

Using a color analyzer (MCPD2000, manufactured by Otsuka Electronics Co., Ltd.), the chromaticity coordinate values (x, y) and stimulus values (Y) in the CIE color system were measured for the obtained dot patterns under a C light source and a 2 degree field of view. .

Next, the substrate was baked at 230 ° C. for 90 minutes, and then the chromaticity coordinate values (x, y) and stimulus values (Y) were measured, and the change in chromaticity before and after the additional baking, that is, ΔE ^* ab was evaluated. As a result, a case where the value of ΔE ^* ab was less than 2.0 was evaluated as "◎", a case where 2.0 or more and less than 4.0 was evaluated as "○", a case where 4.0 or more and less than 6.0 was evaluated as "△", and 6.0 or more Was evaluated as "×". The evaluation results are shown in Table 3. In addition, the smaller the ΔE ^* ab value, the better the heat resistance.

[Evaluation of Solvent Resistance]

The coloring composition (S-1) was coated on a soda glass substrate having a SiO ₂ film preventing the elution of sodium ions using a spin coater, and then prebaked with a hot plate at 90 ° C for 2 minutes to form a film thickness of 2.5 μm. Coating.

Next, after the substrate was cooled to room temperature, each coating film was exposed to radiation including wavelengths of 365 nm, 405 nm, and 436 nm using a high-pressure mercury lamp through a photomask at an exposure amount of 400 J / m ² . Thereafter, a developing solution composed of a 0.04 mass% potassium hydroxide aqueous solution at 23 ° C. was sprayed onto these substrates at a development pressure of 1 kgf / cm ² (nozzle diameter 1 mm), and spray development was performed for 90 seconds. Thereafter, the substrate was washed with ultrapure water, air-dried, and further post-baked in a cleaning oven at 230 ° C. for 30 minutes to form a dot pattern on the substrate. Using a color analyzer (MCPD2000, manufactured by Otsuka Electronics Co., Ltd.), the chromaticity coordinate values (x, y) and stimulus values (Y) in the CIE color system were measured for the obtained dot patterns under a C light source and a 2 degree field of view. .

Thereafter, the substrate was immersed in propylene glycol monomethyl ether acetate at 80 ° C for 40 minutes. The chromaticity coordinate values (x, y) and stimulus values (Y) were measured for the dot patterns after immersion, and the change in chromaticity before and after immersion, that is, ΔE ^* ab was evaluated. As a result, a case where the value of ΔE ^* ab was less than 3.0 was evaluated as "○", a case where 3.0 or more and less than 5.0 was evaluated as "△", and a case where 5.0 or more was evaluated as "x". The evaluation results are shown in Table 3. In addition, the smaller the ΔE ^* ab value, the better the solvent resistance.

[Evaluation of transferability]

The green coloring composition (G) was coated on a soda glass substrate having a SiO ₂ film preventing the elution of sodium ions using a spin coater, and then prebaked on a hot plate at 90 ° C for 2 minutes to form a film thickness of 2.4 μm. Coating.

Next, the substrate was cooled to room temperature, and then each coating film was exposed to radiation including wavelengths of 365 nm, 405 nm, and 436 nm with an exposure amount of 400 J / m ² using a high-pressure mercury lamp. Thereafter, a developing solution composed of a 0.04 mass% potassium hydroxide aqueous solution at 23 ° C. was sprayed onto these substrates at a development pressure of 1 kgf / cm ² (nozzle diameter 1 mm), and spray development was performed for 90 seconds. Thereafter, the substrate was washed with ultrapure water, air-dried, and then post-baked in a cleaning oven at 230 ° C. for 30 minutes to form a green hardened film (T-1) on the substrate. A color analyzer (MCPD2000 manufactured by Otsuka Electronics Co., Ltd.) was used to measure the chromaticity coordinates (x, y) in the CIE color system on the obtained green hardened film (T-1) under a C light source and a 2 degree field of view. And stimulus value (Y).

Next, a green coating film (T-1) was coated with the coloring composition (S-1) using a spin coater, and then prebaked on a hot plate at 90 ° C. for 2 minutes to form a coating film having a film thickness of 2.5 μm. Next, the substrate was cooled to room temperature, and a developing solution composed of a 0.04 mass% potassium hydroxide aqueous solution at 23 ° C. was sprayed onto the substrates at a development pressure of 1 kgf / cm ² (nozzle diameter 1 mm), and sprayed for 90 seconds. Puff development. Thereafter, the substrate was washed with ultrapure water and air-dried. A series of steps from application of the colored composition (S-1) to air-drying is referred to as "(step-1)". For the green hardened film (T-1) after (Step-1), the chromaticity coordinate values (x, y) and the stimulus value (Y) were measured, and the change in the stimulus value before and after (Step-1) was evaluated, that is, ΔY. As a result, the case where the value of ΔY was less than 0.2 was evaluated as “○”, the case where the value of ΔY was 0.2 or more and less than 0.7 was evaluated as “Δ”, and the case where the value was 0.7 or more was evaluated as “×”. The evaluation results are shown in Table 3. In addition, the smaller the ΔY value, the more inhibited the transferability.

Examples 2 to 14 and Comparative Examples 1 to 2

In Example 1, the coloring composition (S-2) to (S-16) were prepared in the same manner as in Example 1 except that the kinds and amounts of the colorant and the binder resin solution were changed as shown in Table 1. ). Then, the obtained colored composition was evaluated in the same manner as in Example 1. The evaluation results are shown in Table 3.

Claims (8)

A coloring composition comprising (A) a colorant and (C) a polymerizable compound, wherein the colorant contains a polymer having a structural unit represented by the following formula (1),

In formula (1), R ⁰ represents a hydrogen atom or a methyl group, and X represents a halogen group, a halogenated hydrocarbon group, or a linking group having an atom other than a carbon atom, a hydrogen atom, or a halogen atom between CC bonds of the halogenated hydrocarbon group. Y represents a single bond or a divalent organic group, Z ⁺ represents a triarylmethane-based cationic chromophore selected from the following formula (2-1),

In the formula (2-1), R ¹ to R ⁶ independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, and a substituted or unsubstituted cycloalkane having 3 to 8 carbon atoms. Group, or a substituted or unsubstituted aryl group, R ⁷ to R ⁹ each independently represent an alkyl group or a chlorine atom having 1 to 8 carbon atoms, l and m each independently represent an integer of 0 to 4 and n represents 0 to 4 An integer of 6, where l, m, and n are not 0 at the same time. For example, the colored composition of claim 1, wherein Y is a divalent hydrocarbon group, a group obtained by combining a divalent hydrocarbon group with a linking group containing a carbon atom and an atom other than a hydrogen atom, or a hydrogen atom of such a group A divalent group partially substituted with a halogen atom. The coloring composition according to claim 1 or 2, further comprising (B) a binder resin. For example, the coloring composition of claim 1 or 2, wherein the content of (A) the colorant is 5 to 70% by mass of the solid content of the coloring composition. The colored composition according to claim 1, wherein the polymer having a structural unit represented by formula (1) further contains a structural unit other than the structural unit represented by formula (1), and the structural unit other than the structural unit represented by formula (1) It is at least one structural unit selected from the group consisting of a structural unit derived from an ethylenically unsaturated monomer having one or more carboxyl groups, a structural unit derived from N-substituted maleimine, A structural unit derived from an aromatic vinyl compound, a structural unit derived from a (meth) acrylate, a structural unit derived from a vinyl ether, and a macromonomer having a mono (meth) acrylfluorene group at the end of a polymer molecular chain The structural unit of the body. For example, the colored composition of claim 5, wherein the ratio p of the structural unit represented by formula (1) to the ratio r of the structural units other than the structural unit represented by formula (1) is p / r = 1 / 0.5 ~ 1/19. A colored hardened film formed using the colored composition according to any one of claims 1 to 6. A display element comprising a colored hardened film as claimed in claim 7.