JP6368068B2 - Coloring agent, coloring composition for color filter, color filter and display element - Google Patents

Description

  The present invention relates to a colorant, a coloring composition, a color filter, and a display element. More specifically, the present invention relates to a color filter such as a transmissive or reflective color liquid crystal display element, a solid-state imaging element, an organic EL display element, and electronic paper. The present invention relates to a suitably used colorant, a color composition containing the colorant, a color filter including a color layer containing the colorant, and a display element including the color filter.

  In producing a color filter using a colored radiation-sensitive composition, a pigment-dispersed colored radiation-sensitive composition is applied on a substrate and dried, and then the dried coating film is irradiated with radiation in a desired pattern shape. There is known a method (Patent Documents 1 and 2) for obtaining pixels of each color by irradiation (hereinafter referred to as “exposure”) and development. A method of forming a black matrix using a photopolymerizable composition in which carbon black is dispersed (Patent Document 3) is also known. Furthermore, a method of obtaining pixels of each color by an ink jet method using a pigment-dispersed colored resin composition is also known (Patent Document 4).

  By the way, it is known that it is effective to use a dye as a colorant in order to achieve high luminance and high color purity of a display element or high definition of a solid-state imaging element. For example, Patent Document 5 reports that by using a xanthene dye having a specific structure, a color filter that can achieve both chromaticity characteristics and heat resistance can be formed.

JP-A-2-144502 JP-A-3-53201 JP-A-6-35188 JP 2000-310706 A Japanese Patent No. 4492760

However, according to the study by the present inventors, it was found that when the specific xanthene dye proposed in Patent Document 5 is used, it is not necessarily suitable for forming a color filter due to low coloring power. .
Therefore, the subject of this invention is providing the coloring composition suitable for formation of the coloring layer which has high coloring power, high heat resistance, and the outstanding chromaticity characteristic. Another object of the present invention is to provide a colorant capable of obtaining the colored composition, a color filter comprising a colored layer containing the colorant, and a display device comprising the color filter. It is in.

  In view of this situation, the present inventors have conducted intensive studies and found that the above-described problems can be solved by using a colorant having a specific structure.

  That is, the present invention is a color filter coloring composition containing (A) a colorant, (B) a binder resin, and (C) a crosslinking agent, and (A) an acidic colorant having a phosphonium cation as the colorant. The present invention provides a coloring composition containing the coloring composition.

  The present invention also provides a color filter comprising a colored layer containing an acidic colorant having a phosphonium cation, and a display element comprising the color filter. Here, the “colored layer” means each color pixel, black matrix, black spacer, etc. used in the color filter.

  Furthermore, the present invention provides an acidic colorant having a phosphonium cation.

  If the coloring composition for color filters of this invention is used, the coloring layer which has high coloring power, high heat resistance, and the outstanding chromaticity characteristic can be formed. Therefore, the color composition for color filter of the present invention includes various color filters including a color filter for display elements, a color filter for color separation of solid-state imaging elements, a color filter for organic EL display elements, and a color filter for electronic paper. Can be used very suitably.

Hereinafter, the present invention will be described in detail.
Color Filter Color Composition Hereinafter, the components of the color filter color composition of the present invention (hereinafter also simply referred to as “color composition”) will be described in detail.

-(A) Colorant-
The colored composition of the present invention contains an acidic colorant having a phosphonium cation (hereinafter also referred to as “the present colorant”) as a colorant. The acidic colorant is an ionic colorant in which the anion portion becomes a chromophore, and the present colorant is a salt in which the anion portion constituting the chromophore and the phosphonium cation form a salt.

First, the phosphonium cation constituting the present colorant will be described.
The phosphonium cation in the present invention is a concept encompassing a cation structure in which a phosphorus atom having a valence of 4 has a positive charge, and the structure is particularly limited as long as it has a cation centered on a phosphorus atom. It is not a thing. Specifically, the following can be mentioned.
(I) A monovalent phosphonium cation having one phosphorus atom as a cation center in a single structure.
(Ii) A polyvalent phosphonium cation having two or more phosphorus atoms as a cation center in a single structure.
(Iii) A polyvalent cation having a phosphorus atom and an atom other than phosphorus as a cation center in a single structure. In addition, a nitrogen atom etc. can be mentioned as an atom which comprises the cation center which consists of atoms other than phosphorus.
(Iv) A cation having a cation center composed of a phosphorus atom, a cation center composed of an arbitrary atom, and an anion center composed of an arbitrary atom in a single structure, and having a positive charge throughout the structure.
Among these, from the viewpoint of easy availability of raw materials, the above (i), (ii) and (iii) are preferable, and the above (i) and (ii) are more preferable.

  As a suitable phosphonium cation in this invention, the cation represented by following formula (1) and Formula (2) can be mentioned, for example.

[In Formula (1),
R < ¹ > -R < ⁴ > shows a hydrogen atom or an organic group mutually independently. However, at least one of R ^{1 to} R ⁴ is an organic group, and two of R ^{1 to} R ⁴ may be bonded to form a ring. ]

[In Formula (2),
R < ⁵ > -R < ¹⁰ > shows a hydrogen atom or an organic group mutually independently. However, two of R ^{5 to} R ¹⁰ may be bonded to form a ring. ;
X represents a divalent linking group. ]

Examples of the organic group in R ^{1 to} R ⁴ include a hydrocarbon group, and more specifically, (1) an aliphatic hydrocarbon group, (2) an alicyclic hydrocarbon group, and (3) a substituent. As an aliphatic hydrocarbon group having an alicyclic hydrocarbon group (hereinafter also referred to as “alicyclic hydrocarbon-substituted aliphatic hydrocarbon group”), (4) an aromatic hydrocarbon group, and (5) an aliphatic as a substituent. Aromatic hydrocarbon group having an aromatic hydrocarbon group (hereinafter also referred to as “aliphatic hydrocarbon-substituted aromatic hydrocarbon group”), (6) aliphatic hydrocarbon group having an aromatic hydrocarbon group as a substituent (hereinafter referred to as “substituent”) , Also referred to as “aromatic hydrocarbon-substituted aliphatic hydrocarbon group”). As for carbon number which comprises the said hydrocarbon group, 1-30 are preferable.

  Examples of the (1) aliphatic hydrocarbon group include an alkyl group, an alkenyl group, and an alkynyl group. 1-30 are preferable, as for carbon number of these aliphatic hydrocarbon groups, 1-24 are more preferable, and 1-20 are especially preferable. These aliphatic hydrocarbon groups may be linear or branched. Specifically, as the alkyl group, for example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec-butyl group, tert-butyl group, hexyl group, heptyl group, octyl group, nonyl Group, decyl group, undecyl group, 1-methyldecyl group, dodecyl group, 1-methylundecyl group, 1-ethyldecyl group, tridecyl group, tetradecyl group, tert-dodecyl group, pentadecyl group, 1-heptyloctyl group, hexadecyl group And octadecyl group. Examples of the alkenyl group include ethenyl group, 1-propenyl group, 2-propenyl group, 1-butenyl group, 2-butenyl group, 1,3-butadienyl group, 1-pentenyl group, 2-pentenyl group, 1-hexenyl. Group, 2-ethyl-2-butenyl group, 2-octenyl group, (4-ethenyl) -5-hexenyl group, 2-decenyl group and the like. Examples of the alkynyl group include ethynyl group, 1-propynyl group, 1-butynyl group, 1-pentynyl group, 3-pentynyl group, 1-hexynyl group, 2-ethyl-2-butynyl group, 2-octynyl group, (4-ethynyl) -5-hexynyl group, 2-decynyl group and the like can be mentioned.

As said (2) alicyclic hydrocarbon group, a C3-C30 alicyclic hydrocarbon group is preferable. Specific examples of the alicyclic hydrocarbon group include a cycloalkyl group, a cycloalkenyl group, a condensed polycyclic hydrocarbon group, a bridged ring hydrocarbon group, a spiro hydrocarbon group, and a cyclic terpene hydrocarbon group. Can do. More specifically, a cycloalkyl group such as a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a t-butylcyclohexyl group, a cycloheptyl group, and a cyclooctyl group; a cycloalkenyl group such as a 1-cyclohexenyl group; Condensed polycyclic hydrocarbon groups such as cyclodecanyl group, decahydro-2-naphthyl group, adamantyl group; tricyclo [5.2.1.0 ^2,6 ] decan-8-yl group, pentacyclopentadecanyl group, Bridged ring hydrocarbon groups such as isobonyl group, dicyclopentenyl group, tricyclopentenyl group; monovalent group obtained by removing one hydrogen atom from spiro [3,4] heptane, spiro [3,4] octane, etc. Spiro hydrocarbon groups; cyclic terpene hydrocarbon groups such as monovalent groups obtained by removing one hydrogen atom from p-menthane, tujang, caran, etc. Can. The cycloalkyl group and cycloalkenyl group preferably have 3 to 12 carbon atoms.

  As said (3) alicyclic hydrocarbon substituted aliphatic hydrocarbon group, the alkyl group substituted by the alicyclic saturated hydrocarbon group is preferable. The total number of carbon atoms of the alicyclic hydrocarbon-substituted aliphatic hydrocarbon group is preferably 4 to 20, and more preferably 6 to 14. Specific examples include a cyclopropylmethyl group, a cyclobutylmethyl group, a cyclopentylmethyl group, a cyclohexylmethyl group, and a cyclohexylethyl group.

  As said (4) aromatic hydrocarbon group, a C6-C20 thing is preferable and a 6-10 thing is more preferable. Specific examples of the aromatic hydrocarbon group include an aryl group. Here, in the present invention, the “aryl group” refers to a monocyclic to tricyclic aromatic hydrocarbon group, and specifically includes a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, an azulenyl group, and 9-fluorenyl. Groups and the like. Among these, a phenyl group, a naphthyl group, and a 9-fluorenyl group are preferable from the viewpoint of easy availability of raw materials.

  The (5) aliphatic hydrocarbon-substituted aromatic hydrocarbon group preferably has a total carbon number of 7 to 30, more preferably 7 to 20. Specific examples include an alkyl-substituted aryl group, and an alkyl-substituted phenyl group is preferable. Specific examples include o-tolyl group, m-tolyl group, p-tolyl group, xylyl group and the like.

  The (6) aromatic hydrocarbon-substituted aliphatic hydrocarbon group preferably has a total carbon number of 7 to 30 and more preferably 7 to 20. Specific examples include a benzyl group, 2-phenylethyl group (phenethyl group), 3-phenylpropyl group, 1-naphthylmethyl group, cinnamyl group, and the like.

The organic group in R ¹ to R ^4, (1) every other hydrocarbon group to (6) can be exemplified heterocyclic group, acetonyl group, a phenacyl group. The heterocyclic group is preferably a monovalent heterocyclic group having 3 to 10 carbon atoms, specifically, pyrrolidinyl group, imidazolidinyl group, pyrazolidinyl group, piperidyl group, piperidino group, piperazinyl group, homopyrerazinyl group, morpholinyl group. An alicyclic heterocyclic group such as the theomorpholinyl group, 1,3-dioxolan-2-yl group, pyridyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, quinolyl group, isoquinolyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, Aromatics such as thienyl, furyl, pyranyl, pyrrolyl, imidazolyl, pyrazolyl, triazoyl, tetrazolyl, thiazolyl, oxazolyl, indolyl, indazolyl, benzoimidazolyl, purinyl, phthalimide, etc. List heterocyclic groups It can be.

The organic group in R ^{1 to} R ⁴ may further have a substituent without departing from the gist of the present invention. The position and number of substituents are arbitrary, and when having two or more substituents, the substituents may be the same or different. Examples of such substituents include halogen atoms, hydroxyl groups, cyano groups, formyl groups, carboxyl groups, nitro groups, amino groups, dialkylamino groups, diarylamino groups, alkoxy groups, alkoxycarbonyl groups, alkylthio groups, arylthio groups, A trialkylsilyl group, a heterocyclic group, etc. can be mentioned.

  Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. Examples of the dialkylamino group include a dimethylamino group and a diethylamino group, and examples of the diarylamino group include a diphenylamino group. Examples of the alkoxy group include a methoxy group, an ethoxy group, a propoxy group, and a butoxy group. Examples of the alkoxycarbonyl group include a methoxycarbonyl group, an ethoxycarbonyl group, a propoxycarbonyl group, and a butoxycarbonyl group. Examples of the alkylthio group include a methylthio group and an ethylthio group, and examples of the arylthio group include a phenylthio group. Examples of the trialkylsilyl group include a trimethylsilyl group. Examples of the heterocyclic group include those described above.

Two organic groups in R ^{1 to} R ⁴ may be bonded to each other to form a ring. Specifically, (1-i) when R ¹ and R ² are bonded to each other to form a ring, and R ³ and R ⁴ do not form a ring,
(1-ii) when R ¹ and R ² are bonded to each other to form a first ring, and R ³ and R ⁴ are bonded to each other to form a second ring,
Any of these are possible embodiments as the phosphonium cation of the present colorant. Of these, the case of (1-i) is preferable from the viewpoint of easy availability of raw materials.

At least one of R ^{1 to} R ⁴ is an organic group, but at least three of R ^{1 to} R ⁴ are preferably organic groups from the viewpoint of the stability of the colored composition and the availability of raw materials, It is more preferable that all four are organic groups, and it is particularly preferable that all four are hydrocarbon groups. Further, R ¹ to R ⁴ total number of carbon atoms constituting the preferably from 5 to 50, particularly preferably 10 to 40. By setting R ^{1 to} R ⁴ in such an embodiment, a colorant that has good solubility in organic solvents and good coloring power and can form pixels with a high contrast ratio can be obtained.

In the formula (2), as the organic group in R ^{5 to} R ^10, the same group as the organic group in R ^{1 to} R ⁴ can be adopted. The specific configuration is as described above. Further, the organic group in R ^{5 to} R ¹⁰ may further have a substituent, and the substituent is the same as the substituent that the organic group in R ^{1 to} R ⁴ may have. Can be mentioned.

Two organic groups in R ^{5 to} R ¹⁰ may be bonded to each other to form a ring. Specifically, (2-i) when R ⁵ and R ⁶ are bonded to each other to form a ring, and R ^{7 to} R ¹⁰ do not form a ring, (2-ii) R ⁵ and R ⁶ are bonded to each other. To form a first ring, R ⁸ and R ⁹ are bonded to each other to form a second ring, and R ⁷ and R ¹⁰ do not form a ring,
(2-iii) when R ⁵ and R ¹⁰ are bonded to each other to form a ring, and R ^{6 to} R ⁹ do not form a ring,
Any of these are possible embodiments of the phosphonium cation of the present colorant. Among these, the case of (2-i) is preferable from the viewpoint of easy availability of raw materials.

As the organic group in R ^{5 to} R ¹⁰ , at least two of R ^{5 to} R ⁷ are organic groups from the viewpoint of the stability of the coloring composition and the availability of raw materials, and at least R ^{8 to} R ¹⁰ . Two are preferably organic groups, and it is particularly preferable that all six of R ^{5 to} R ¹⁰ are organic groups.

  Examples of the divalent linking group for X include an alkanediyl group, an alkenediyl group, a 1,4-phenylenebis (alkanediyl) group, an oxy group, an oxyalkanediyloxy group, and an alkanediyloxyalkanediyl group. .

  As said alkanediyl group, a C1-C10 thing is preferable. Specifically, methylene group, ethylene group, ethane-1,1-diyl group, propane-1,1-diyl group, propane-1,2-diyl group, propane-1,3-diyl group, propane-2 , 2-diyl group, butane-1,2-diyl group, butane-1,3-diyl group, butane-1,4-diyl group, pentane-1,4-diyl group, pentane-1,5-diyl group Hexane-1,5-diyl group, hexane-1,6-diyl group, octane-1,8-diyl group, decane-1,10-diyl group and the like. Among them, an alkanediyl group having 1 to 8 carbon atoms is preferable, an alkanediyl group having 1 to 6 carbon atoms is more preferable, and in particular, a methylene group, an ethylene group, a propane-1,3-diyl group, butane-1,4- A diyl group, a pentane-1,5-diyl group, and a hexane-1,6-diyl group are preferred.

The alkenediyl group is preferably one having 2 to 10 carbon atoms, specifically, ethene-1,1-diyl group, ethene-1,2-diyl group, propene-1,2-diyl group, propene-1 , 3-diyl group, propene-2,3-diyl group, 1-butene-1,2-diyl group, 1-butene-1,3-diyl group, 1-butene-1,4-diyl group, 2- Examples thereof include a pentene-1,5-diyl group and a 3-hexene-1,6-diyl group.
The 1,4-phenylenebis (alkanediyl) group is a group in which an alkanediyl group is bonded to both ends of the 1,4-phenylene group, and the total carbon number of the 1,4-phenylenebis (alkanediyl) group is 8-10 are preferred. Specific examples include a 1,4-phenylenebis (methylene) group and a 1,4-phenylenebis (ethylene) group.
The oxyalkanediyloxy group is a group in which oxygen atoms are bonded to both ends of the alkanediyl group, and the total number of carbon atoms of the oxyalkanediyloxy group is preferably 1-10. Specific examples include an oxymethyleneoxy group, an oxyethyleneoxy group, an oxytrimethyleneoxy group, an oxypropane-1,2-diyloxy group, and an oxytetramethyleneoxy group.
The alkanediyloxyalkanediyl group is a group in which two alkanediyl groups are bonded via an oxygen atom, and the total carbon number of the alkanediyloxyalkanediyl group is preferably 2-20. Specifically, methyleneoxymethylene group, ethyleneoxyethylene group, trimethyleneoxytrimethylene group, ethyleneoxytrimethylene group, propane-1,2-diyloxypropane-1,2-diyl group, ethyleneoxypropane-1 , 2-diyl group, tetramethyleneoxytetramethylene group and the like.

  Examples of the cation represented by the formula (1) or the formula (2) include cations shown in the following compound groups α to γ.

Next, the anion part which comprises the chromophore of this coloring agent is demonstrated. It is chromophores having ^- as the anion portion of the coloring agent, -SO ₃ ^-, -COO ^- is not particularly limited as long as the chromophore having an anionic functional group such as, -SO ₃ Is preferred.

  In the present invention, various chromophores can be applied as the chromophore. Examples of the chromophore in the present invention include a xanthene chromophore having an anionic functional group, a triarylmethane chromophore having an anionic functional group, an azo chromophore having an anionic functional group, and an anionic functional group. Anthraquinone chromophore having an anionic functional group, a phthalocyanine chromophore having an anionic functional group, a quinoline chromophore having an anionic functional group, an azine chromophore having an anionic functional group, Examples thereof include an acridine chromophore having an anionic functional group and an indigo chromophore having an anionic functional group.

  As the xanthene chromophore, chromophores represented by the following formulas (3-1) and (3-2) are preferable.

[In Formula (3-1),
R ^{31 to} R ³⁴ are each independently a hydrogen atom, —R ⁵⁶ or an aromatic hydrocarbon group having 6 to 10 carbon atoms (provided that the hydrogen atom contained in the aromatic hydrocarbon group is a halogen atom, — R ⁵⁶ , —OH, —OR ⁵⁶ , —SO ₃ H, —SO ₃ M, —SO ₃ ⁻ , —COOH, —COO ⁻ , —CO ₂ R ⁵⁶ , —SO ₃ R ⁵⁶ , —SO ₂ NHR ⁵⁷ or -Optionally substituted with —SO ₂ NR ⁵⁷ R ⁵⁸ ). ;
R < ³⁵ > -R < ⁴⁰ > shows a hydrogen atom or a C1-C8 alkyl group mutually independently. ;
R ^{41 to} R ⁴⁵ are independently of each other —SO ₃ H, —SO ₃ M, —SO ₃ ⁻ , —COOH, —CO ₂ R ⁵⁶ , —SO ₃ R ⁵⁶ , —SO ₂ NHR ⁵⁷ or —SO. ₂ NR ⁵⁷ R ⁵⁸ is shown. ;
R ⁵⁶ represents a saturated hydrocarbon group having 1 to 10 carbon atoms (provided that the hydrogen atom contained in the saturated hydrocarbon group may be substituted with a halogen atom, and the methylene group contained in the saturated hydrocarbon group is , An oxygen atom, a carbonyl group or —NR ⁵⁶ — may be substituted). ;
R ⁵⁷ and R ⁵⁸ each 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 ⁵⁷ and R ⁵⁸ are bonded to each other. Or a substituted or unsubstituted heterocyclic group having 1 to 10 carbon atoms formed. However, the hydrogen atom contained in the alkyl group and cycloalkyl group may be substituted with a hydroxyl group, a halogen atom, -Z, -CH = CH ₂ or -CH = CHR ⁵⁶ , and the alkyl group and cycloalkyl The methylene group contained in the group may be substituted with an oxygen atom, a carbonyl group or —NR ⁵⁶ —, and the hydrogen atom contained in the heterocyclic group is substituted with —R ⁵⁶ , —OH or —Z. May be. ;
M represents a sodium atom or a potassium atom. ;
Z is an aromatic hydrocarbon group having 6 to 10 carbon atoms or an aromatic heterocyclic group having 5 to 10 carbon atoms (the hydrogen atom contained in the aromatic hydrocarbon group and aromatic heterocyclic group is —OH, R ⁵⁶ , —OR ⁵⁶ , —NO ₂ , —CH═CH ₂ , —CH═CHR ^56, or a halogen atom, which may be substituted. ;
Provided that at least one of R ³¹ to R ³⁴ is -COO ^- or -SO ₃ ^- or an aromatic hydrocarbon radical having, or at least one of R ⁴¹ to R ⁴⁵ -SO ₃ ^- is. ]

[In Formula (3-2),
R ^{46 to} R ⁵¹ each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a halogen atom. ;
R ^{52 to} R ⁵⁵ are each independently —OH, —SO ₃ H, —SO ₃ M, —SO ₃ ⁻ , —COOH, —COO ⁻ , —CO ₂ R ⁵⁶ , —SO ₃ R ⁵⁶ , — It shows the SO ₂ NHR ⁵⁷ or -SO ₂ NR ⁵⁷ R ^58. ;
M, R ^56, R ^57, R ⁵⁸ are each synonymous M, and R ^56, R ^57, R ⁵⁸ in the formula (3-1). ]

The saturated hydrocarbon group for R ⁵⁶ may be linear, branched or cyclic as long as it has 1 to 10 carbon atoms, and may have a bridged structure. 1-8, Furthermore, C1-C6 is preferable and C1-C4 is more preferable. Specifically, for example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, secondary butyl group, tertiary butyl group, isobutyl group, amyl group, tertiary amyl group, hexyl group, heptyl group, octyl Group, isooctyl group, tertiary octyl group, 2-ethylhexyl group, nonyl group, decanyl group and other aliphatic hydrocarbon groups; cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group and other alicyclic hydrocarbon groups; A saturated hydrocarbon group having a bridged structure such as a tricyclodecanyl group can be exemplified. Examples of the group in which the methylene group contained in the saturated hydrocarbon group is substituted with an oxygen atom include a methoxypropyl group, an ethoxypropyl group, a 2-ethylhexyloxypropyl group, and a methoxyhexyl group. Among these, an aliphatic hydrocarbon group having 1 to 10 carbon atoms and an alicyclic hydrocarbon group having 3 to 10 carbon atoms are preferable, an aliphatic hydrocarbon group having 1 to 8 carbon atoms and an aliphatic hydrocarbon having 5 to 8 carbon atoms. A cyclic hydrocarbon group is preferable, and an aliphatic hydrocarbon group having 1 to 4 carbon atoms, a cyclopentyl group, and a cyclohexyl group are more preferable.

Examples of the substituted or unsubstituted heterocyclic group having 1 to 10 carbon atoms formed by combining R ⁵⁷ and R ⁵⁸ with each other include pyrrole, pyridine, indole, isoindole, quinoline, isoquinoline, carbazole, phenanthridine, and acridine And phenothiazine. Examples of the substituent in the heterocyclic group include a halogen atom, a hydroxyl group, an alkoxy group, an amino group, and an alkyl group.
Examples of the aromatic heterocyclic group having 5 to 10 carbon atoms in Z include a furyl group, a thienyl group, a pyridyl group, a pyrrolyl group, an oxazolyl group, an isoxazol group, a thiazolyl group, an isothiazolyl group, an imidazolyl group, a pyrazolyl group, and a pyrimidyl group. Can be mentioned. Examples of the halogen atom are the same as those described above.

Examples of the aromatic hydrocarbon group for R ^{31 to} R ³⁴ and Z include a phenyl group and a naphthyl group.
Examples of —SO ₃ R ⁵⁶ in R ^{31 to} R ³⁴ and R ^{41 to} R ⁴⁵ include a methanesulfonyl group, an ethanesulfonyl group, a hexanesulfonyl group, and a decanesulfonyl group. Examples of —CO ₂ R ⁵⁶ include a methyloxycarbonyl group, an ethyloxycarbonyl group, a propyloxycarbonyl group, an isopropyloxycarbonyl group, a butyloxycarbonyl group, a cyclohexyloxycarbonyl group, and a methoxypropyloxycarbonyl group. Furthermore, -SO ₂ NHR ^57, as the R ^57, R ⁵⁸ in -SO ₂ NR ⁵⁷ R ^58, branched alkyl groups having 6 to 8 carbon atoms, cycloalkyl group having 5 to 7 carbon atoms, an allyl group An aralkyl group having 8 to 10 carbon atoms, a hydroxyl group-containing alkyl group having 2 to 8 carbon atoms, an alkoxy group-containing alkyl group having 2 to 8 carbon atoms, and an aryl group are preferable.
Specific examples of the alkyl group in R ^{35 to} R ⁴⁰ and the alkyl group and halogen atom in R ^{46 to} R ⁵¹ include the same ones as described above.

Of the xanthene-based chromophores represented by Formula (3-1) and Formula (3-2), the following are preferable. That is, in the formula (3-1), R ^{31 to} R ³⁴ are ethyl groups, R ⁴¹ and R ⁴³ are —SO ₃ ⁻ , R ^{35 to} R ⁴⁰ , R ⁴² , and R ^{44 to} R ⁴⁵ are hydrogen atoms. A group is preferred.

Moreover, in Formula (3-2),
A chromophore in which R ⁴⁶ and R ⁴⁹ are bromine atoms, and R ^{47 to} R ⁴⁸ and R ^{50 to} R ⁵⁵ are hydrogen atoms;
A chromophore in which R ⁴⁶ , R ⁴⁷ , R ⁴⁹ and R ⁵¹ are bromine atoms, and R ⁴⁸ , R ⁵⁰ and R ^{52 to} R ⁵⁵ are hydrogen atoms;
A chromophore in which R ⁴⁶ , R ⁴⁷ , R ⁴⁹ and R ⁵¹ are bromine atoms, R ^{52 to} R ⁵⁵ are chlorine atoms, and R ⁴⁸ and R ⁵⁰ are hydrogen atoms;
A chromophore in which R ⁴⁶ , R ⁴⁷ , R ⁴⁹ , and R ⁵¹ are iodine atoms, and R ⁴⁸ , R ⁵⁰ , and R ^{52 to} R ⁵⁵ are hydrogen atoms;
A chromophore in which R ⁴⁶ , R ⁴⁷ , R ⁴⁹ and R ⁵¹ are iodine atoms, R ^{52 to} R ⁵⁵ are chlorine atoms, and R ⁴⁸ and R ⁵⁰ are hydrogen atoms is preferable.

  The triarylmethane chromophore is preferably a chromophore represented by the following formula (4).

[In Formula (4),
Ar represents a group represented by any one of the following formulas (4-a) and (4-b). ;
R ⁷¹ to R ⁷⁴ represents independently of one another, a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, a group having a phenyl group or ethylenically unsaturated bond. ;
R ^{75 to} R ⁸² each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, —COOR ′ (R ′ represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms) or a halogen atom. Show. ]

[In Formula (4-a),
R ^{83 to} R ⁸⁷ are each independently a hydrogen atom, —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or —SO ₃ ^— . Show. ;
* Indicates a bond.
Provided that at least one of R ⁸³ to R ⁸⁷ is -COO ^- or -SO ₃ ^- it is. ]

[In Formula (4-b),
R ^{88 to} R ⁹⁴ are each independently a hydrogen atom, —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or —SO ₃ ^— . Show. ;
* Indicates a bond.
Provided that at least one of R ⁸⁸ to R ⁹⁴ is -COO ^- or -SO ₃ ^- it is. ]

Examples of the alkyl group having 1 to 8 carbon atoms and the cycloalkyl group having 3 to 8 carbon atoms according to R ^{71 to} R ⁷⁴ include the same ones as described above.
In the group having an ethylenically unsaturated bond, the bond position and the number of bonds of the ethylenically unsaturated bond are not particularly limited. Examples of the ethylenically unsaturated bond include a (meth) acryloyl group, a vinylaryl group, a vinyloxy group, and an allyl group. Among these, a (meth) acryloyl group is preferable from the viewpoint of easy reaction. Preferable examples of the group having an ethylenically unsaturated bond include 2-[(meth) acryloyloxy] ethyl group.

(Including 'R of' -COOR in ^{R 75 ~R 82) R 75 ~R} 82 in such alkyl group having 1 to 8 carbon atoms may be the same as the above. Examples of the halogen atom related to R ^{75 to} R ⁸² include the same as those described above.

Of the triarylmethane chromophores represented by formula (4), the following are preferred. That is, Ar is a group represented by the formula (4-a), R ⁸³ and R ⁸⁵ are —SO ₃ ⁻ , R ^{71 to} R ⁷⁴ are ethyl groups, R ^{75 to} R ⁸² , R ⁸⁴ , R ⁸⁶ to A chromophore in which R ⁸⁷ is a hydrogen atom is preferred.

  As the azo chromophore, chromophores represented by the following formulas (5-1) and (5-2) are preferable.

[In Formula (5-1),
R ¹⁰¹ represents a group represented by any of the following formulas (5-a), (5-b), and (5-c). ;
R ¹⁰² to R ¹⁰⁶ are independently of each other hydrogen ^{atom, -R 121, -NR 122 R 123} , -NO 2, -OH, -COOH, -COO -, -SO 3 H, -SO 3 M (M Represents a sodium atom or a potassium atom) or —SO ₃ ^— . ;
R ¹²¹ represents an alkyl group having 1 to 6 (preferably 1 to 4) carbon atoms. ;
R ¹²² and R ¹²³ each independently represent a hydrogen atom or a substituted or unsubstituted aryl group. ;
However, when R ¹⁰¹ is a group represented by the formula (5-a), at least one of R ^{102 to} R ¹⁰⁶ is —COO 2 ^— or —SO ₃ ^— , or —NR ¹²² R ¹²³ there are, at least one of said R ¹²² and R ¹²³ -COO ^- or -SO ₃ ^- is an aryl group having a.
If R ¹⁰¹ is a group represented by the formula (5-b), at least one of R ¹⁰² to R ¹⁰⁶ and R ¹³⁷ to R ¹⁴² is -COO ^- or -SO ₃ ^- or is, or -NR ¹²² R ¹²³ , wherein at least one of R ¹²² and R ¹²³ is an aryl group having —COO 2 ^— or —SO ₃ ^— .
When R ¹⁰¹ is a group represented by the formula (5-c), at least one of R ^{102 to} R ¹⁰⁶ and R ^{144 to} R ¹⁵⁰ is —COO 2 ^— or —SO ₃ ^— , or —NR ¹²² R ¹²³ , wherein at least one of R ¹²² and R ¹²³ is an aryl group having —COO 2 ^— or —SO ₃ ^— . ]

[In Formula (5-2),
R ^{107 to} R ¹²⁰ are each independently a hydrogen atom, —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or —SO ₃ ^— . Show.
However, at least one of R ^{107 to} R ¹²⁰ is —COO ^— or —SO ₃ ^— . ]

[In Formula (5-a),
R ^{131 to} R ¹³⁶ each independently represent a hydrogen atom or an alkyl group having 1 to 6 (preferably 1 to 4) carbon atoms. ;
* Indicates a bond. ]

[In Formula (5-b),
R ^{137 to} R ¹⁴² are each independently a hydrogen atom, —NR ¹²⁴ R ¹²⁵ , —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or -SO ₃ ^- shows the. ;
R ¹²⁴ and R ¹²⁵ each independently represent a hydrogen atom, an alkyl group having 1 to 6 (preferably 1 to 4) carbon atoms, an alkylcarbonyl group, or a cycloalkylcarbonyl group. ;
* Indicates a bond. ]

[In Formula (5-c),
R ^{144 to} R ¹⁵⁰ are each independently a hydrogen atom, —NO ₂ , —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or — SO ₃ ^- is shown. ]

Examples of the alkyl group having 1 to 6 carbon atoms (preferably 1 to 4) in R ¹²¹ include those described above.
Examples of the aryl group in R ¹²² and R ¹²³ include aryl groups having 6 to 14 carbon atoms (preferably 6 to 10 carbon atoms). Specific examples include a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, and the like. And a phenyl group is preferred. The aryl group may have a substituent, such as —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or -SO _3- ^{and the} like can be mentioned.

Examples of the alkyl group having 1 to 6 carbon atoms (preferably 1 to 4) in R ¹²⁴ and R ¹²⁵ are the same as those described above.
The alkylcarbonyl in R ¹²⁴ and R ^125, preferably an alkyl group having 2 to 7 carbon atoms (preferably 2 to 4), specifically, a methyl group, an ethyl group, a propyl group, a butyl group Tert-butylcarbonyl group, hexylcarbonyl group and the like. Moreover, as a cycloalkyl carbonyl group, a C4-C7 cycloalkyl carbonyl group is preferable, and a cyclohexyl carbonyl group etc. can be mentioned specifically ,. Of these, a methylcarbonyl group and an ethylcarbonyl group are more preferable.

Examples of the alkyl group having 1 to 6 (preferably 1 to 4) carbon atoms in R ^{131 to} R ¹³⁴ , R ¹³⁵ , and R ¹³⁶ include the same ones as described above.

Of the azo chromophores represented by formula (5-1) and formula (5-2), the following are preferred. That is, in the formula (5-1), when R ¹⁰¹ is a group represented by the formula (5-a),
A chromophore wherein R ¹⁰² is —COO ⁻ , R ^{135 to} R ¹³⁶ are methyl groups, R ^{103 to} R ¹⁰⁶ and R ^{131 to} R ¹³⁴ are hydrogen atoms;
A chromophore in which R ¹⁰⁴ is —SO ₃ ⁻ , R ^{135 to} R ¹³⁶ are methyl groups, and R ^{102 to} R ¹⁰³ , R ^{105 to} R ¹⁰⁶ , and R ^{131 to} R ¹³⁴ are hydrogen atoms is preferable.

In the formula (5-1), when R ¹⁰¹ is a group represented by the formula (5-b),
R ^{102 to} R ¹⁰⁶ are hydrogen atoms, R ¹³⁷ and R ¹⁴⁰ are —SO ₃ ⁻ , R ¹⁴² is —NR ¹²⁴ R ¹²⁵ (R ¹²⁴ is a hydrogen atom and R ¹²⁵ is a methylcarbonyl group), R ^{138 to} R ¹³⁹ and A chromophore in which R ¹⁴¹ is a hydrogen atom;
R ¹⁰³ is —NR ¹²² R ¹²³ (R ¹²² is a hydrogen atom, R ¹²³ is a (p-sulfonic acid) phenyl group), R ¹⁰⁴ is a methyl group, R ¹³⁸ is —SO ₃ ⁻ , and R ¹⁰² , R ^{105 to} R ^A chromophore in which ¹⁰⁶ , R ¹³⁷ and R ^{139 to} R ¹⁴² are hydrogen atoms is preferred.

In the formula (5-1), when R ¹⁰¹ is a group represented by the formula (5-c),
A chromophore in which R ¹⁰⁴ is —SO ₃ ⁻ , R ¹⁴⁸ is —OH, R ^{102 to} R ¹⁰³ , R ^{105 to} R ¹⁰⁶ , R ^{144 to} R ¹⁴⁷ , and R ^{149 to} R ¹⁵⁰ are hydrogen atoms;
A chromophore in which R ¹⁰⁴ is —SO ₃ ⁻ , R ¹⁵⁰ is —OH, R ^{102 to} R ¹⁰³ , R ^{105 to} R ¹⁰⁶ , and R ^{144 to} R ¹⁴⁹ are hydrogen atoms is preferable.

In formula (5-2),
A chromophore in which R ¹⁰⁸ , R ¹¹¹ , R ¹¹⁶ are —SO ₃ ⁻ , R ¹⁰⁷ is —OH, R ^{109 to} R ¹¹⁰ , R ^{112 to} R ¹¹⁵ , and R ^{117 to} R ¹²⁰ are hydrogen atoms;
A chromophore in which R ¹¹¹ , R ¹¹³ and R ¹¹⁶ are —SO ₃ ⁻ , R ¹⁰⁷ is —OH, R ^{108 to} R ¹¹⁰ , R ¹¹² , R ^{114 to} R ¹¹⁵ , and R ^{117 to} R ¹²⁰ are hydrogen atoms is preferable.

In the present invention, an azo chromophore represented by the following formula (5-3) can also be applied.

[In Formula (5-3),
R ^{151 to} R ¹⁵⁴ are each independently a hydrogen atom, —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or —SO ₃ ^— . Show.
However, at least one of R ^{151 to} R ¹⁵⁴ is —COO ^— or —SO ₃ ^— . ]

Of the azo chromophores represented by the formula (5-3), the following are preferred. That is, a chromophore in which R ¹⁵¹ and R ¹⁵⁴ are —SO ₃ ⁻ and R ^{152 to} R ¹⁵³ are hydrogen atoms is preferable.

  As the quinone chromophore, a chromophore represented by the following formula (6) is preferable.

[In Formula (6),
R ^{171 to} R ¹⁸⁰ are each independently a hydrogen atom, —R ¹⁸¹ , —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom), — SO ₃ ^- is shown. Provided that at least one of R ¹⁷¹ to R ¹⁸⁰ is -COO ^- or -SO ₃ ^- it is. ;
R ¹⁸¹ represents an alkyl group having 1 to 6 (preferably 1 to 4) carbon atoms. ]

^Examples of the alkyl group for R ¹⁸¹ include the same as those described above.

Of the quinone chromophore represented by the formula (6), the following are preferable. That is, a chromophore in which R ¹⁷¹ and R ¹⁷⁶ are —SO ₃ ⁻ , R ¹⁷³ and R ¹⁷⁸ are methyl groups, and R ¹⁷² , R ^{174 to} R ¹⁷⁵ , R ¹⁷⁷ and R ^{179 to} R ¹⁸⁰ are hydrogen atoms is preferable.

  As the phthalocyanine chromophore, a chromophore represented by the following formula (7) is preferable.

[In Formula (7),
R ^{201 to} R ²¹⁶ are each independently a hydrogen atom, —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or —SO ₃ ^— . Show. Provided that at least one of R ²⁰¹ to R ²¹⁶ is -COO ^- or -SO ₃ ^- it is. ]

Of the phthalocyanine chromophore represented by the formula (7), the following are preferable. That is, R ²⁰² , R ²⁰⁶ , R ²¹⁰ and R ²¹⁴ are —SO ₃ ^— , and R ²⁰¹ , R ^{203 to} R ²⁰⁵ , R ^{207 to} R ²⁰⁹ , R ^{211 to} R ²¹³ , and R ^{215 to} R ²¹⁶ are hydrogen atoms. A chromophore is preferred.

  As the acridine chromophore, a chromophore represented by the following formula (8) is preferable.

[In Formula (8-1),
r8 represents an integer of 1 to 4. ;
R ²³¹ represents a hydrogen atom, —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or —SO ₃ ^— . However, if r8 is 1, R ²³¹ is -COO ^- or -SO ₃ ^-. And, in the case where r8 is an integer of 2 to 4, at least one of the plurality of R ²³¹ is -COO ^- or -SO ₃ ^-, and the remainder of R ²³¹ may be the same or different. ]

[In Formula (8-2),
s8 represents an integer of 1 to 6. ;
R ²³² represents a hydrogen atom, —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or —SO ₃ ^— . However, if the s8 is 1, R ²³² is -COO ^- or -SO ₃ ^-. And, in the case where s8 is an integer of from 2 to 6, at least one of the plurality of R ²³² is -COO ^- or -SO ₃ ^-, and the remainder of R ²³² may be the same or different. ]

Of the acridine chromophores represented by formula (8-1) and formula (8-2), the following are preferred. That is,
A chromophore in which, in formula (8-1), r8 is 2 or 3, and a plurality of R ²³¹ are all —SO ₃ ^— ;
In formula (8-2), a chromophore in which s8 is 2 and two R ^232s are both —SO ₃ ^— is preferable.

  The indigo chromophore is preferably a chromophore represented by the following formula (9).

[In Formula (9),
R ^{251 to} R ²⁵⁸ are each independently a hydrogen atom, —OH, —COOH, —COO ⁻ , —SO ₃ H, —SO ₃ M (M is a sodium atom or a potassium atom) or —SO ₃ ^— . Show. Provided that at least one of R ²⁵¹ to R ²⁵⁸ is -COO ^- or -SO ₃ ^- it is. ]

Of the indigo chromophores represented by formula (9), the following are preferred. That is, a chromophore in which R ²⁵³ and R ²⁵⁷ are —SO ₃ ^— , and R ^{251 to} R ²⁵² , R ^{254 to} R ²⁵⁶ , and R ²⁵⁸ are hydrogen atoms is preferable.

  Among the above chromophores, xanthene chromophores having an anionic functional group, triarylmethane chromophores having an anionic functional group, azo chromophores having an anionic functional group, and quinone color development having an anionic functional group Preferably, at least one chromophore selected from the group consisting of a group, a phthalocyanine chromophore having an anionic functional group, an acridine chromophore having an anionic functional group, and an indigo chromophore having an anionic functional group, In particular, there is at least one chromophore selected from the group consisting of a xanthene chromophore having an anionic functional group, a triarylmethane chromophore having an anionic functional group, and an indigo chromophore having an anionic functional group. More preferred.

The colorant can also be obtained, for example, by a salt exchange reaction between a known acidic dye and a known phosphonium salt compound.
Known acidic dyes include C.I. (issued by C.I .: The Society of Dyer's and Colorists). I. Examples include compounds classified as acid, for example, dyes having the following color index (CI) names.

C. I. Acid Yellow 11, C.I. I. Acid Orange 7, C.I. I. Acid Red 37, C.I. I. Acid Red 180, C.I. I. Azo acid dyes such as Acid Blue 29;
C. I. Acid Blue 1, C.I. I. Acid Blue 7, C.I. I. Acid Blue 9, C.I. I. Acid Blue 83, C.I. I. Acid Blue 90, C.I. I. Acid Blue 93, C.I. I. Triarylmethane acid dyes such as Acid Green 16;
C. I. Acid Blue 40, C.I. I. Anthraquinone acid dyes such as Acid Green 25;
C. I. Acid Red 52, C.I. I. Acid Red 87, C.I. I. Acid Red 92, C.I. I. Acid Red 289, C.I. I. Xanthene acid dyes such as Acid Red 388;
C. I. Quinoline acid dyes such as Acid Yellow 3;
C. I. Acid Yellow 1, C.I. I. Nitro acid dyes such as Acid Orange 3;

C. I. Quinone acid dyes such as Acid Green 25;
C. I. Phthalocyanine acid dyes such as Acid Blue 249;
C. I. Quinoline acid dyes such as Acid Yellow 3;
C. I. Acid Blue 59, C.I. I. Azine acid dyes such as Acid Blue 102;
C. I. Acid Yellow 3, C.I. I. Acridine acid dyes such as Acid Yellow 5;
C. I. Indigo acid dyes such as Acid Blue 74.

  Among such known acid dyes, xanthene dyes, triarylmethane dyes, azo dyes, quinone dyes, phthalocyanine dyes, acridine dyes, indigo dyes are preferable, xanthene dyes, triarylmethane dyes Dyes, azo dyes, and indigo dyes are more preferable.

Further, as the known phosphonium salt compounds, cations shown in the compound groups α to γ, halogen ions, boron anions, phosphate anions, carboxylate anions, sulfate anions, organic sulfonate anions, nitrogen anions, methide anions, hydroxylation Mention may be made of salts with at least one anion selected from the group consisting of physical ions. Among them, cations shown in the compound groups α to γ, halogen ions such as fluoride ion, chloride ion, bromide ion and iodide ion, inorganic boron anions such as BF ₄ ⁻ , (C ₆ H ₅ ) ₄ B ⁻ the organic boron anion PF ₆ etc. ^- such inorganic phosphate anion, sulfate _{anion, [(CF 3 SO 2)} 2 N] - nitrogen anion, OH ^- a salt with at least one anion selected from the group consisting of From the viewpoint of easy availability.

  For the salt exchange reaction between the acid dye and the phosphonium salt compound, a known method can be employed. For example, the colorant can be obtained by dissolving the above-mentioned known acid dye and phosphonium salt compound in a solvent and stirring. Can be easily manufactured. In this production, the solution may be heated as necessary.

  The colorant thus obtained includes various (poly) alkylene glycol monoalkyl ethers such as propylene glycol monomethyl ether and (poly) alkylene glycol monoalkyl ether acetates such as propylene glycol monomethyl ether acetate. It is soluble in organic solvents and has excellent heat resistance and coloring power. Therefore, the present colorant is extremely useful as a colorant used in a color filter coloring composition and the like, and can be preferably used as an acidic colorant.

  This coloring agent can be used individually or in mixture of 2 or more types.

The coloring composition of this invention can contain another coloring agent further as a coloring agent with this coloring agent. Other colorants are not particularly limited, and colors and materials can be appropriately selected according to the application.
As the other colorant, any of dyes, pigments and natural pigments other than the present colorant can be used, but organic pigments and organic dyes are preferable in terms of obtaining pixels having high luminance and color purity. .

  Examples of the organic pigment include compounds classified as pigments in the color index (CI; issued by The Society of Dyer's and Colorists), that is, the color index (CI) name as shown below. Can be mentioned.

C. I. Pigment red 166, C.I. I. Pigment red 177, C.I. I. Pigment red 224, C.I. I. Pigment red 242, C.I. I. Pigment red 254, C.I. I. Red pigments such as CI Pigment Red 264;
C. I. Pigment green 7, C.I. I. Pigment green 36, C.I. I. Green pigments such as CI Pigment Green 58;
C. I. Pigment blue 15: 6, C.I. I. Blue pigments such as CI Pigment Blue 80;
C. I. Pigment yellow 83, C.I. I. Pigment yellow 129, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139, C.I. I. Pigment yellow 150, C.I. I. Pigment yellow 179, C.I. I. Pigment yellow 180, C.I. I. Pigment yellow 185, C.I. I. Pigment yellow 211, C.I. I. Yellow pigments such as CI Pigment Yellow 215;
C. I. Orange pigments such as CI Pigment Orange 38;
C. I. Purple pigment such as CI Pigment Violet 23.
C. I. Pigment black 1, C.I. I. Black pigments such as CI Pigment Black 7.

In the present invention, when a pigment is used as another colorant, 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. Moreover, the pigment surface may be used by modifying the particle surface with a resin if desired.
Examples of the resin that modifies the particle surface of the pigment include vehicle resins described in JP-A No. 2001-108817, and various commercially available resins for dispersing pigments. As a resin coating method on the carbon black surface, for example, methods described in JP-A-9-71733, JP-A-9-95625, JP-A-9-124969 and the like can be employed.
The organic pigment is preferably used by refining primary particles by so-called salt milling. As a salt milling method, for example, a method disclosed in Japanese Patent Application Laid-Open No. 08-179111 can be employed.

  In the present invention, when a pigment is used as another colorant, a known dispersant and dispersion aid can be further contained. Known dispersants include, for example, urethane dispersants, polyethylene imine dispersants, polyoxyethylene alkyl ether dispersants, polyoxyethylene alkyl phenyl ether dispersants, polyethylene glycol diester dispersants, sorbitan fatty acid ester dispersants. A dispersant, a polyester-based dispersant, an acrylic-based dispersant and the like, and examples of the dispersion aid include a pigment derivative and the like.

  Such dispersants are commercially available. For example, acrylic dispersants such as Disperbyk-2000, Disperbyk-2001, BYK-LPN6919, BYK-LPN21116, BYK-LPN21324 (above, BYK Corporation (BYK)) And the like as a urethane-based dispersant, Disperbyk-161, Disperbyk-162, Disperbyk-165, Disperbyk-167, Disperbyk-170, Disperbyk-182 (above, manufactured by BYK Chemy (BYK)), Solsperse 76500 (Lubrisol) Etc.) as a polyethyleneimine-based dispersant, Solsperse 24000 (manufactured by Lubrizol Co., Ltd.), etc. as a polyester-based dispersant. B821, Adisper PB822, Adisper PB880, Adisper PB881 (or more, Ajinomoto Fine-Techno Co., Ltd.), and the like, can be mentioned, respectively.

  Specific examples of the pigment derivative include copper phthalocyanine, diketopyrrolopyrrole, sulfonic acid derivatives of quinophthalone, and the like.

  The dye other than the colorant can be appropriately selected from various oil-soluble dyes, direct dyes, acid dyes, metal complex dyes and the like.

  Further, as another colorant, a colorant in which a salt formed by an anion portion constituting a chromophore and a cation other than a phosphonium cation can be used in combination. As such a colorant, for example, a salt-forming compound composed of a xanthene acid dye and a quaternary ammonium salt compound described in JP2011-138894A, JP2011-174987A, etc. The salt-forming compound which consists of the anthraquinone type acid dye and quaternary ammonium salt compound which are described can be mentioned.

  In the present invention, other colorants can be used alone or in admixture of two or more.

In this invention, when using this colorant and another colorant together, the content rate of this colorant is 10-80 mass% in all the colorants, Preferably it is 15-70 mass%, More preferably, it is 20-60. % By mass. In the present invention, an embodiment in which the present colorant and pigment are used in combination is preferred.
(A) The content ratio of the colorant is usually 5 to 70% by mass in the solid content of the coloring composition, preferably from the point of forming a pixel having high luminance and excellent color purity, or a black matrix having excellent light shielding properties. 5 to 60% by mass. Solid content here is components other than the solvent mentioned later.

-(B) Binder resin-
Although it does not specifically limit as (B) binder resin in this invention, It is preferable that it is resin which has acidic functional groups, such as a carboxyl group and a phenolic hydroxyl group. Among them, a polymer having a carboxyl group (hereinafter also referred to as “carboxyl group-containing polymer”) is preferable. For example, an ethylenically unsaturated monomer having one or more carboxyl groups (hereinafter referred to as “unsaturated monomer”). And a copolymer of another copolymerizable ethylenically unsaturated monomer (hereinafter also referred to as “unsaturated monomer (b2)”). .

Examples of the unsaturated monomer (b1) include (meth) acrylic acid, maleic acid, maleic anhydride, succinic acid mono [2- (meth) acryloyloxyethyl], ω-carboxypolycaprolactone mono (meta ) Acrylate, p-vinylbenzoic acid and the like.
These unsaturated monomers (b1) can be used alone or in admixture of two or more.

Moreover, as said unsaturated monomer (b2), for example,
N-substituted maleimides such as N-phenylmaleimide and N-cyclohexylmaleimide;
Aromatic vinyl compounds such as styrene, α-methylstyrene, p-hydroxystyrene, p-hydroxy-α-methylstyrene, p-vinylbenzylglycidyl ether, acenaphthylene;

Methyl (meth) acrylate, n-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, allyl (meth) acrylate, benzyl (meth) acrylate, polyethylene glycol (degree of polymerization 2 -10) methyl ether (meth) acrylate, polypropylene glycol (degree of polymerization 2 to 10) methyl ether (meth) acrylate, polyethylene glycol (degree of polymerization 2 to 10) mono (meth) acrylate, polypropylene glycol (degree of polymerization 2 to 10) ) mono (meth) acrylate, cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, tricyclo [5.2.1.0 ^2,6] decan-8-yl (meth) acrylate, dicyclopentenyl (meth) acrylate Glycerol mono (meth) acrylate, 4-hydroxyphenyl (meth) acrylate, ethylene oxide modified (meth) acrylate of paracumylphenol, glycidyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 3-[( (Meth) acrylic acid esters such as (meth) acryloyloxymethyl] oxetane, 3-[(meth) acryloyloxymethyl] -3-ethyloxetane;

Vinyl ethers such as cyclohexyl vinyl ether, isobornyl vinyl ether, tricyclo [5.2.1.0 ^2,6 ] decan-8-yl vinyl ether, pentacyclopentadecanyl vinyl ether, 3- (vinyloxymethyl) -3-ethyloxetane ;
Examples thereof include a macromonomer having a mono (meth) acryloyl group at the end of a polymer molecular chain such as polystyrene, polymethyl (meth) acrylate, poly-n-butyl (meth) acrylate, and polysiloxane.
These unsaturated monomers (b2) can be used alone or in admixture 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. More preferably, it is 10 to 40% by mass. By copolymerizing the unsaturated monomer (b1) in such a range, a colored composition excellent in 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, JP-A-7-140654, JP-A-8-259876, and JP-A-10-31308. No. 10, JP-A-10-300902, JP-A-11-174224, JP-A-11-258415, JP-A-2000-56118, JP-A-2004-101728, etc. Coalescence can be mentioned.

  In the present invention, for example, JP-A-5-19467, JP-A-6-230212, JP-A-7-207211, JP-A-9-325494, JP-A-11-140144, As disclosed in Kaikai 2008-181095 and the like, a carboxyl group-containing polymer having a polymerizable unsaturated bond such as a (meth) acryloyl group in the side chain can also be used as a binder resin. In the colored composition of the present invention, a highly sensitive colored composition can be obtained by using a carboxyl group-containing polymer having a polymerizable unsaturated bond such as a (meth) acryloyl group in the side chain as a binder resin. Moreover, it is preferable at the point that the sclerosis | hardenability of a coating film can be improved.

  The binder resin in the present invention has a polystyrene-reduced weight average molecular weight (Mw) measured by gel permeation chromatography (hereinafter abbreviated as GPC) (elution solvent: tetrahydrofuran), usually from 1,000 to 100,000. Preferably it is 3,000-50,000. If Mw is too small, the remaining film rate of the resulting film may be reduced, pattern shape, heat resistance, etc. may be impaired, and electrical characteristics may be deteriorated. On the other hand, if Mw is too large, resolution may be reduced. In addition, the pattern shape may be damaged, and dry foreign matter may be easily generated during application by the slit nozzle method.

  Further, the ratio (Mw / Mn) of the weight average molecular weight (Mw) and the number average molecular weight (Mn) of the binder resin in the present invention is preferably 1.0 to 5.0, more preferably 1.0 to 3. .0. In addition, Mn here says the number average molecular weight of polystyrene conversion measured by GPC (elution solvent: tetrahydrofuran).

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

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

  In this invention, content of binder resin is 10-1,000 mass parts normally with respect to 100 mass parts of (A) coloring agents, Preferably it is 20-500 mass parts. If the content of the binder resin is too small, for example, the alkali developability may be decreased, or the storage stability of the resulting colored composition may be decreased. On the other hand, if the content is too large, the colorant concentration is relatively high. Therefore, it may be difficult to achieve the target color density as a thin film.

-(C) Crosslinking agent-
In the present invention, (C) a crosslinking agent refers to a compound having two or more polymerizable groups. Examples of the polymerizable group include an ethylenically unsaturated group, an oxiranyl group, an oxetanyl group, and an N-alkoxymethylamino group. In the present invention, (C) the crosslinking agent is preferably a compound having two or more (meth) acryloyl groups or a compound having two or more N-alkoxymethylamino groups.

  Specific examples of the compound having two or more (meth) acryloyl groups include a polyfunctional (meth) acrylate obtained by reacting an aliphatic polyhydroxy compound and (meth) acrylic acid, a caprolactone-modified polyfunctional ( (Meth) acrylate, alkylene oxide-modified polyfunctional (meth) acrylate, hydroxyl-functional (meth) acrylate and polyfunctional isocyanate obtained by reacting with polyfunctional isocyanate, hydroxyl-functional (meth) acrylate and acid The polyfunctional (meth) acrylate which has a carboxyl group obtained by making an anhydride react can be mentioned.

  Here, examples of the aliphatic polyhydroxy compound include divalent aliphatic polyhydroxy compounds such as ethylene glycol, propylene glycol, polyethylene glycol, and polypropylene glycol; glycerin, trimethylolpropane, pentaerythritol, and dipentaerythritol. Mention may be made of trivalent or higher aliphatic polyhydroxy compounds. Examples of the (meth) acrylate having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, and glycerol dihydrate. A methacrylate etc. can be mentioned. Examples of the polyfunctional isocyanate include tolylene diisocyanate, hexamethylene diisocyanate, diphenylmethylene diisocyanate, and isophorone diisocyanate. Examples of acid anhydrides include succinic anhydride, maleic anhydride, glutaric anhydride, itaconic anhydride, phthalic anhydride, dibasic acid anhydrides such as hexahydrophthalic anhydride, pyromellitic anhydride, biphenyltetracarboxylic acid. Examples thereof include dianhydrides and tetrabasic acid dianhydrides such as benzophenone tetracarboxylic dianhydride.

  Examples of the caprolactone-modified polyfunctional (meth) acrylate include compounds described in paragraphs [0015] to [0018] of JP-A No. 11-44955. The alkylene oxide-modified polyfunctional (meth) acrylate is at least one selected from bisphenol A di (meth) acrylate modified with at least one selected from ethylene oxide and propylene oxide, ethylene oxide and propylene oxide. Modified with at least one selected from trimethylolpropane tri (meth) acrylate, ethylene oxide and propylene oxide modified with at least one selected from modified isocyanuric acid tri (meth) acrylate, ethylene oxide and propylene oxide Pen modified with at least one selected from pentaerythritol tri (meth) acrylate, ethylene oxide and propylene oxide. Dipentaerythritol modified with at least one selected from dipentaerythritol penta (meth) acrylate, ethylene oxide and propylene oxide modified with at least one selected from taerythritol tetra (meth) acrylate, ethylene oxide and propylene oxide Examples include hexa (meth) acrylate.

  Examples of the compound having two or more N-alkoxymethylamino groups include compounds having a melamine structure, a benzoguanamine structure, and a urea structure. The melamine structure and the benzoguanamine structure refer to a chemical structure having one or more triazine rings or phenyl-substituted triazine rings as a basic skeleton, and is 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′-tetra (alkoxymethyl) benzoguanamine, N, N, N ′, N′-tetra (alkoxymethyl) glycoluril and the like.

Among these crosslinking agents, polyfunctional (meth) acrylates obtained by reacting trivalent or higher aliphatic polyhydroxy compounds with (meth) acrylic acid, polyfunctional (meth) acrylates modified with caprolactone, polyfunctional urethanes ( (Meth) acrylate, polyfunctional (meth) acrylate having a carboxyl group, N, N, N ′, N ′, N ″, N ″ -hexa (alkoxymethyl) melamine, N, N, N ′, N′— Tetra (alkoxymethyl) benzoguanamine is preferred. Among the polyfunctional (meth) acrylates obtained by reacting trivalent or higher aliphatic polyhydroxy compounds with (meth) acrylic acid, trimethylolpropane triacrylate, pentaerythritol triacrylate, dipentaerythritol pentaacrylate, dipenta Among polyfunctional (meth) acrylates having a carboxyl group, erythritol hexaacrylate is obtained by reacting pentaerythritol triacrylate and succinic anhydride, and reacting dipentaerythritol pentaacrylate and succinic anhydride. The compound is particularly preferable in that the strength of the colored layer is high, the surface smoothness of the colored layer is excellent, and background stains and film residues are hardly generated on the unexposed substrate and the light shielding layer.
In the present invention, the crosslinking agent (C) can be used alone or in admixture of two or more.

  In the present invention, the content of the (C) crosslinking agent is preferably 10 to 1,000 parts by mass, and particularly preferably 20 to 500 parts by mass with respect to 100 parts by mass of the (A) colorant. In this case, if the content of the crosslinking agent is too small, sufficient curability may not be obtained. On the other hand, if the content of the crosslinking agent is too large, when the coloring composition of the present invention is imparted with alkali developability, the alkali developability is deteriorated, and the soil or film on the unexposed portion of the substrate or on the light shielding layer is deteriorated. There is a tendency for the rest to occur easily.

-Photopolymerization initiator-
The coloring composition of the present invention can contain a photopolymerization initiator. Thereby, radiation sensitivity can be provided to a coloring composition. The photopolymerization initiator used in the present invention is a compound that generates an active species capable of initiating polymerization of (C) a crosslinking agent upon exposure to radiation such as visible light, ultraviolet light, far ultraviolet light, electron beam, and X-ray.

  Examples of such photopolymerization initiators include thioxanthone compounds, acetophenone compounds, biimidazole compounds, triazine compounds, O-acyloxime compounds, onium salt compounds, benzoin compounds, benzophenone compounds, α -A diketone compound, a polynuclear quinone compound, a diazo compound, an imide sulfonate compound, an onium salt compound, etc. can be mentioned.

  In this invention, a photoinitiator can be used individually or in mixture of 2 or more types. The photopolymerization initiator is preferably at least one selected from the group consisting of thioxanthone compounds, acetophenone compounds, biimidazole compounds, triazine compounds, and O-acyloxime compounds.

  Among preferred photopolymerization initiators in the present invention, specific examples of thioxanthone compounds include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2-isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-dichlorothioxanthone, 2 , 4-dimethylthioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone and the like.

  Specific examples of the acetophenone compound include 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4 -Morpholinophenyl) butan-1-one, 2- (4-methylbenzyl) -2- (dimethylamino) -1- (4-morpholinophenyl) butan-1-one, and the like.

  Specific examples of the biimidazole compound include 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, Examples thereof include 4 ′, 5,5′-tetraphenyl-1,2′-biimidazole.

  In addition, when using a biimidazole-type compound as a photoinitiator, it is preferable at the point which can improve a sensitivity to use a hydrogen donor together. The “hydrogen donor” as used herein means a compound that can donate a hydrogen atom to a radical generated from a biimidazole compound by exposure. Examples of the hydrogen donor include mercaptan-based hydrogen donors such as 2-mercaptobenzothiazole and 2-mercaptobenzoxazole; 4,4′-bis (dimethylamino) benzophenone, 4,4′-bis (diethylamino) benzophenone, and the like. And an amine-based hydrogen donor. In the present invention, hydrogen donors can be used alone or in admixture of two or more. However, one or more mercaptan hydrogen donors and one or more amine hydrogen donors are used in combination. It is preferable that the sensitivity can be further improved.

  Specific examples of the triazine compound include 2,4,6-tris (trichloromethyl) -s-triazine, 2-methyl-4,6-bis (trichloromethyl) -s-triazine, 2- [2 -(5-methylfuran-2-yl) ethenyl] -4,6-bis (trichloromethyl) -s-triazine, 2- [2- (furan-2-yl) ethenyl] -4,6-bis (trichloro Methyl) -s-triazine, 2- [2- (4-diethylamino-2-methylphenyl) ethenyl] -4,6-bis (trichloromethyl) -s-triazine, 2- [2- (3,4-dimethoxy) Phenyl) ethenyl] -4,6-bis (trichloromethyl) -s-triazine, 2- (4-methoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4- Triazine-based compounds having a halomethyl group such as xystyryl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4-n-butoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine Can be mentioned.

  Specific examples of the O-acyloxime compound include 1,2-octanedione, 1- [4- (phenylthio) phenyl]-, 2- (O-benzoyloxime), ethanone and 1- [9-ethyl. -6- (2-methylbenzoyl) -9H-carbazol-3-yl]-, 1- (O-acetyloxime), ethanone, 1- [9-ethyl-6- (2-methyl-4-tetrahydrofuranylmethoxy) Benzoyl) -9H-carbazol-3-yl]-, 1- (O-acetyloxime), ethanone, 1- [9-ethyl-6- {2-methyl-4- (2,2-dimethyl-1,3) -Dioxolanyl) methoxybenzoyl} -9H-carbazol-3-yl]-, 1- (O-acetyloxime) and the like. As commercially available O-acyloxime compounds, NCI-831, NCI-930 (manufactured by ADEKA Corporation) and the like can also be used.

  In this invention, when using photoinitiators other than biimidazole type compounds, such as an acetophenone type compound, a sensitizer can also be used together. Examples of such a sensitizer include 4,4′-bis (dimethylamino) benzophenone, 4,4′-bis (diethylamino) benzophenone, 4-diethylaminoacetophenone, 4-dimethylaminopropiophenone, and 4-dimethyl. Ethyl aminobenzoate, 2-ethylhexyl 4-dimethylaminobenzoate, 2,5-bis (4-diethylaminobenzal) cyclohexanone, 7-diethylamino-3- (4-diethylaminobenzoyl) coumarin, 4- (diethylamino) chalcone, etc. Can be mentioned.

  In this invention, 0.01-120 mass parts is preferable with respect to 100 mass parts of (C) crosslinking agents, and, as for content of a photoinitiator, 1-100 mass parts is especially preferable. In this case, if the content of the photopolymerization initiator is too small, curing by exposure may be insufficient. On the other hand, if the content is too large, the formed colored layer tends to be detached from the substrate during development.

-Solvent-
The colored composition of the present invention contains the above components (A) to (C) and other components that are optionally added, but is usually prepared as a liquid composition by blending a solvent. As said solvent, (A)-(C) component which comprises a coloring composition, and another component are disperse | distributed or melt | dissolved, and it does not react with these components, but suitably has volatility. You can choose to use.

As such a solvent, for example,
Ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n-propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol monomethyl 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-propyl ether, propylene glycol mono-n-butyl ether, dipropylene glycol monomethyl ether, di Propylene glycol mono Chirueteru, dipropylene glycol mono -n- propyl ether, dipropylene glycol mono -n- butyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monoethyl (poly) alkylene glycol monoalkyl ethers such as ether;

Lactic acid alkyl esters such as methyl lactate and ethyl lactate;
(Cyclo) alkyl alcohols such as methanol, ethanol, propanol, butanol, isopropanol, isobutanol, t-butanol, octanol, 2-ethylhexanol, 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, 3-methoxybutyl acetate, (Poly) alkylene glycol monoalkyl ether acetates such as 3-methyl-3-methoxybutyl acetate;
Other ethers such as diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, tetrahydrofuran;
Ketones such as methyl ethyl ketone, cyclohexanone, 2-heptanone, 3-heptanone;

Diacetates such as propylene glycol diacetate, 1,3-butylene glycol diacetate, 1,6-hexanediol diacetate;
Alkoxycarboxylic esters such as methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, ethyl ethoxyacetate, 3-methyl-3-methoxybutylpropionate ;
Ethyl acetate, n-propyl acetate, i-propyl acetate, n-butyl acetate, i-butyl acetate, n-amyl formate, i-amyl acetate, n-butyl propionate, ethyl butyrate, n-propyl butyrate, i-butyric acid Other esters such as -propyl, n-butyl butyrate, methyl pyruvate, ethyl pyruvate, n-propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, ethyl 2-oxobutanoate;
Aromatic hydrocarbons such as toluene and xylene;
Examples include amides or lactams such as N, N-dimethylformamide, N, N-dimethylacetamide, and N-methylpyrrolidone.

Among these solvents, from the viewpoint of solubility, pigment dispersibility, coatability, etc., propylene glycol monomethyl ether, propylene glycol monoethyl ether, ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, 3-methoxybutyl acetate, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, cyclohexanone, 2-heptanone, 3-heptanone, 1,3-butylene glycol diacetate, 1,6-hexanediol diacetate, ethyl lactate, 3-methoxypropionic acid Ethyl, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, 3-methyl-3-methoxybutyl Pioneto acetate n- butyl acetate i- butyl, formic acid n- amyl acetate, i- amyl, n- butyl propionate, ethyl butyrate, i- propyl butyrate n- butyl, ethyl pyruvate and the like are preferable.
In this invention, a solvent can be used individually or in mixture of 2 or more types.

  Although content of a solvent is not specifically limited, The quantity from which the total density | concentration of each component except the solvent of the coloring composition becomes 5-50 mass% is preferable, and the quantity used as 10-40 mass% More preferred. By setting it as such an aspect, the coloring agent dispersion liquid with favorable dispersibility and stability and the coloring composition with favorable applicability | paintability can be obtained.

-Additives-
The coloring composition of this invention can also contain a various additive as needed.
Examples of additives include thermal polymerization initiators such as azo compounds and organic peroxides; fillers such as glass and alumina; polymer compounds such as polyvinyl alcohol and poly (fluoroalkyl acrylates); fluorine-based interfaces Surfactants such as activators and silicon surfactants; vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3 4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloropro Adhesion promoters such as rumethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane; 2,2-thiobis (4-methyl-6-t- Butylphenol), 2,6-di-t-butylphenol and other antioxidants; UV absorption of 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, alkoxybenzophenones, etc. Agent; anti-aggregation agent such as sodium polyacrylate; malonic acid, adipic acid, itaconic acid, citraconic acid, fumaric acid, mesaconic acid, 2-aminoethanol, 3-amino-1-propanol, 5-amino-1-pen Tanol, 3-amino-1,2-propanediol, 2-amino-1,3-pro Diol, 4-amino-1,2-butanediol, etc .; succinic acid mono [2- (meth) acryloyloxyethyl], phthalic acid mono [2- (meth) acryloyloxyethyl], ω- Examples include developability improvers such as carboxypolycaprolactone mono (meth) acrylate; siloxane oligomers having a reactive functional group disclosed in Japanese Patent Application Laid-Open No. 2008-2242078 and the like.

  The coloring composition of the present invention can be prepared by an appropriate method. When the coloring agent is a dye, it is disclosed in, for example, JP-A-2008-58642, JP-A-2010-132874, and the like. Can be prepared by any method. Further, in the case where the present colorant is a dye and is used in combination with a pigment, as disclosed in JP 2010-132874 A, a dye solution containing the present colorant is passed through the first filter. Thereafter, the dye solution that has passed through the first filter is mixed with a separately prepared pigment dispersion or the like, and a method of preparing the resulting colored composition through a second filter can be employed. In addition, after dissolving the dye containing the present colorant, the above components (B) to (C), and other components used as necessary in a solvent, the obtained solution is passed through the first filter Alternatively, a method may be employed in which the solution that has passed through the first filter is mixed with a separately prepared pigment dispersion, and the resulting colored composition is passed through a second filter. Moreover, after passing the dye solution containing this coloring agent etc. through a 1st filter, the dye solution which passed the 1st filter, said (B)-(C) component, and the other used as needed The components are mixed and dissolved, the resulting solution is passed through the second filter, the solution that has passed through the second filter is further mixed with a separately prepared pigment dispersion, and the resulting colored composition is mixed with the third filter. A method of preparing by passing through a filter can also be employed.

Color filter and production method thereof The color filter of the present invention comprises a colored layer containing the present colorant.

  As a method for producing a color filter, first, the following method may be mentioned. First, a light shielding layer (black matrix) is formed on the surface of the substrate so as to divide a portion where pixels are formed, if necessary. Next, for example, a blue liquid-sensitive composition of the radiation-sensitive composition of the present invention containing the coloring agent is applied on the substrate, and then prebaked to evaporate the solvent to form a coating film. Subsequently, after exposing this coating film through a photomask, it develops using an alkali developing solution, and the unexposed part of a coating film is dissolved and removed. Thereafter, post-baking is performed to form a pixel array in which blue pixel patterns are arranged in a predetermined arrangement.

  Subsequently, using each radiation sensitive coloring composition of green or red, application of each radiation sensitive coloring composition, pre-baking, exposure, development, and post-baking are performed in the same manner as described above to obtain a green pixel array and red color. Are sequentially formed on the same substrate. Thereby, a color filter in which pixel arrays of the three primary colors of red, green and blue are arranged on the substrate is obtained. However, in the present invention, the order of forming pixels of each color is not limited to the above. In the first method for producing a color filter, any one or more of the blue, green, and red pixel arrays may be a colored layer containing the acidic colorant of the present invention.

  The black matrix can be formed by forming a metal thin film such as chromium formed by sputtering or vapor deposition into a desired pattern using a photolithography method. Using the radiation coloring composition, it can be formed in the same manner as in the case of forming the pixel. The coloring composition of the present invention can also be suitably used for forming such a black matrix.

Examples of the substrate used when forming the color filter include glass, silicon, polycarbonate, polyester, aromatic polyamide, polyamideimide, and polyimide.
In addition, these substrates may be subjected to appropriate pretreatment such as chemical treatment with a silane coupling agent or the like, plasma treatment, ion plating, sputtering, gas phase reaction method, vacuum deposition, etc., if desired.

  When applying the radiation-sensitive coloring composition to the substrate, an appropriate coating method such as a spray method, a roll coating method, a spin coating method (spin coating method), a slit die coating method, or a bar coating method may be employed. In particular, it is preferable to employ a spin coating method or a slit die coating method.

  Pre-baking is usually performed by combining vacuum drying and heat drying. The drying under reduced pressure is usually performed until the pressure reaches 50 to 200 Pa. Moreover, the conditions of heat drying are 70-110 degreeC normally for about 1 to 10 minutes.

  The coating thickness is usually 0.6 to 8 μm, preferably 1.2 to 5 μm, as the film thickness after drying.

  Examples of radiation light sources used in forming pixels and / or black matrices include xenon lamps, halogen lamps, tungsten lamps, high pressure mercury lamps, ultrahigh pressure mercury lamps, metal halide lamps, medium pressure mercury lamps, and low pressure mercury lamps. Examples thereof include a light source, a laser light source such as an argon ion laser, a YAG laser, a XeCl excimer laser, and a nitrogen laser. An ultraviolet LED can also be used as the exposure light source. The wavelength is preferably radiation in the range of 190 to 450 nm.

Exposure of the radiation is generally preferred 10~10,000J / m ^2.
Examples of the alkali developer include sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium hydroxide, tetramethylammonium hydroxide, choline, 1,8-diazabicyclo- [5.4.0] -7-. An aqueous solution of undecene, 1,5-diazabicyclo- [4.3.0] -5-nonene or the like is preferable.

An appropriate amount of a water-soluble organic solvent such as methanol or ethanol, a surfactant or the like can be added to the alkaline developer. In addition, it is usually washed with water after alkali development.
As a development processing method, a shower development method, a spray development method, a dip (immersion) development method, a paddle (liquid accumulation) development method, or the like can be applied. The development conditions are preferably 5 to 300 seconds at room temperature.

The post-baking conditions are usually 120 to 280 ° C. for about 10 to 60 minutes, but from the viewpoint of heat resistance of the present colorant, the post-baking temperature is preferably 240 ° C. or less, particularly preferably 230 ° C. or less. is there.
The film thickness of the pixel thus formed is usually 0.5 to 5 μm, preferably 1 to 3 μm.

  Further, as a second method for producing a color filter, a method of obtaining pixels of each color by an ink jet method disclosed in JP-A-7-318723 and JP-A-2000-310706 can be employed. . In this method, first, a partition having a light shielding function is formed on the surface of the substrate. Next, for example, a blue liquid composition of the thermosetting coloring composition of the present invention containing the coloring agent is ejected by an ink jet apparatus and then prebaked to evaporate the solvent. Next, the coating film is exposed as necessary, and then cured by post-baking to form a blue pixel pattern.

  Next, using the green or red thermosetting coloring composition, a green pixel pattern and a red pixel pattern are sequentially formed on the same substrate in the same manner as described above. Thereby, a color filter in which pixel patterns of the three primary colors of red, green and blue are arranged on the substrate is obtained. However, in the present invention, the order of forming pixels of each color is not limited to the above. In the second method for producing a color filter, any one or more of the blue, green and red pixel arrays may be a colored layer containing the acidic colorant of the present invention.

In addition, the partition has not only a light shielding function but also a function for preventing the color composition of each color discharged in the section from being mixed, so that the film is a film compared to the black matrix used in the first method described above. Thick. Therefore, a partition is normally formed using a black radiation sensitive composition.
The substrate used when forming the color filter, the light source of radiation, and the pre-baking and post-baking methods and conditions are the same as in the first method described above. Thus, the film thickness of the pixel formed by the inkjet method is about the same as the height of the partition wall.

A protective film is formed on the pixel pattern thus obtained as necessary, and then a transparent conductive film is formed by sputtering. After forming the transparent conductive film, a spacer can be further formed to form a color filter. The spacer is usually formed using a radiation-sensitive composition, but may be a light-shielding spacer (black spacer). In this case, a radiation-sensitive colored composition in which a black colorant is dispersed is used, but the colored composition of the present invention can also be suitably used for forming such a black spacer.
Since the color filter of the present invention thus obtained has extremely high luminance and color purity, it is extremely useful for color liquid crystal display elements, color image pickup tube elements, color sensors, organic EL display elements, electronic paper, and the like.

Display element The display element of the present invention comprises the color filter 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 color filter of the present invention may be a transmissive type or a reflective type, and can have an appropriate structure. For example, the color filter is formed on a substrate different from the driving substrate on which the 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 interposed therebetween. Furthermore, a substrate in which a color filter is formed on the surface of a driving substrate on which a thin film transistor (TFT) is disposed, and an ITO (indium oxide doped with tin) electrode or IZO (indium oxide and zinc oxide) It is also possible to adopt a structure in which the substrate on which the electrode is formed is opposed to the substrate with a liquid crystal layer interposed therebetween. The latter structure has the advantage that the aperture ratio can be remarkably improved, and a bright and high-definition liquid crystal display element can be obtained.

  The color liquid crystal display device including the color filter of the present invention may include a backlight unit using a white LED as a light source in addition to a cold cathode fluorescent lamp (CCFL). As the white LED, for example, a white LED that obtains white light by color mixing by combining a red LED, a green LED, and a blue LED, a white LED that obtains white light by color mixing by combining a blue LED, a red LED, and a green phosphor, and a blue LED White LED that obtains white light by mixing colors, red LED and green light emitting phosphor, white LED that obtains white light by mixing colors of blue LED and YAG phosphor, blue LED, orange light emitting phosphor and green light emitting fluorescence A white LED that obtains white light by color mixing by combining the body, a white LED that obtains white light by color mixing by combining an ultraviolet LED, a red light emitting phosphor, a green light emitting phosphor, and a blue light emitting phosphor can be exemplified.

  The color liquid crystal display device having the color filter of the present invention includes a TN (twisted nematic) type, an STN (super twisted nematic) type, an IPS (in-plane switching) type, a VA (vertical alignment) type, and an OCB (Optic Optical). An appropriate liquid crystal mode such as a birefringence type can be applied.

  Moreover, the organic EL display element provided with the color filter of the present invention can take an appropriate structure, and examples thereof include a structure disclosed in JP-A-11-307242.

  In addition, the electronic paper including the color filter of the present invention can adopt an appropriate structure, and examples thereof include a structure disclosed in Japanese Patent Application Laid-Open No. 2007-41169.

  Hereinafter, the embodiment of the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples.

<Synthesis and Evaluation of the Colorant>
1. Synthesis of this colorant

Synthesis example 1
In a 200 mL eggplant-shaped flask containing a stirring bar, C.I. I. 2.9 g (5.0 mmol) of Acid Red 52 and 29 mL of ion-exchanged water were added, and the mixture was heated to a bath temperature of 85 ° C. in an oil bath while stirring. To this solution, a solution obtained by dissolving 5.2 g (10.26 mmol) of tributylhexadecylphosphonium bromide in 60 g of ion exchange water at room temperature was added little by little at the same temperature. When all were added, it was confirmed that a water-insoluble colored oily substance was formed. Then, after stirring at the same temperature for 1 hour, it cooled to room temperature vicinity using the ice bath. The supernatant was removed by decantation, and then the residue was washed with ion-exchanged water. The residue was dissolved in methanol and collected, and then concentrated under reduced pressure using a rotary evaporator. The obtained oily residue was dried under reduced pressure at 50 ° C. for 12 hours to obtain 6.1 g of a reddish purple solid.
It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-1). Let the obtained compound be dye (A-1).

Synthesis example 2
A compound having a chromophore derived from Acid Red 52 and distearyldimethylammonium was synthesized according to the method described in paragraph [0131] of Japanese Patent No. 4492760. Let the obtained compound be dye (A-2).

Synthesis example 3
In Synthesis Example 1, instead of Acid Red 52, a red-purple solid was obtained in the same manner as in Synthesis Example 1 except that 3.38 g (5.00 mmol) of Acid Red 289, which is a xanthene acid dye, was used. 34 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-3). Let the obtained compound be a dye (A-3).

Synthesis example 4
In Synthesis Example 1, 3.38 g (5.00 mmol) of Acid Red 289, which is a xanthene acid dye, was substituted for Acid Red 52, and 3.53 g (10.10 of tributylmethylphosphonium iodide was substituted for tributylhexadecylphosphonium bromide). 26 mmol) In the same manner as in Synthesis Example 1 except that it was used, 3.20 g of a reddish purple solid was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-4). Let the obtained compound be a dye (A-4).

Synthesis example 5
In Synthesis Example 1, 1.81 g of a red-purple solid was obtained in the same manner as in Synthesis Example 1 except that 3.53 g (10.26 mmol) of tributylmethylphosphonium iodide was used instead of tributylhexadecylphosphonium bromide. . It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-5). Let the obtained compound be a dye (A-5).

Synthesis Example 6
In the same manner as in Synthesis Example 1 except that 4.06 g (10.26 mmol) of tributyloctylphosphonium bromide was used instead of tributylhexadecylphosphonium bromide in Synthesis Example 1, 5.43 g of a red-purple solid was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-6). Let the obtained compound be a dye (A-6).

Synthesis example 7
In Synthesis Example 1, 3.38 g (5.00 mmol) of Acid Red 289, which is a xanthene acid dye, is used instead of Acid Red 52, and 4.06 g (10.26 mmol) of tributyloctylphosphonium bromide is used instead of tributylphosphonium bromide. Except that, 5.96 g of a red-purple solid was obtained in the same manner as in Synthesis Example 1. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-7). Let the obtained compound be a dye (A-7).

Synthesis example 8
In the same manner as in Synthesis Example 1 except that 4.63 g (10.26 mmol) of tributyldodecylphosphonium bromide was used instead of tributylhexadecylphosphonium bromide in Synthesis Example 1, 6.40 g of a red-purple solid was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-8). Let the obtained compound be dye (A-8).

Synthesis Example 9
In Synthesis Example 1, 5.93 g of a red-purple solid was obtained in the same manner as in Synthesis Example 1 except that 3.99 g (10.26 mmol) of benzyltriphenylphosphonium chloride was used instead of tributylhexadecylphosphonium bromide. . It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-9). Let the obtained compound be dye (A-9).

Synthesis Example 10
In Synthesis Example 1, a reddish purple solid was obtained in the same manner as in Synthesis Example 1 except that 5.19 g (10.26 mmol) of 4-butoxybenzyltriphenylphosphonium bromide was used instead of tributylhexadecylphosphonium bromide. 95 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-10). Let the obtained compound be dye (A-10).

Synthesis Example 11
In Synthesis Example 1, a reddish purple solid was used in the same manner as in Synthesis Example 1 except that 5.82 g (10.26 mmol) of n-hexadecyltriphenylphosphonium bromide was used instead of tributylhexadecylphosphonium bromide. 24 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-11). Let the obtained compound be a dye (A-11).

Synthesis Example 12
In Synthesis Example 1, 6.84 g of a red-purple solid was obtained in the same manner as in Synthesis Example 1 except that 4.96 g (10.26 mmol) of n-decyltriphenylphosphonium bromide was used instead of tributylhexadecylphosphonium bromide. Obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-12). Let the obtained compound be dye (A-12).

Synthesis Example 13
In Synthesis Example 1, 5.39 g of a red-purple solid was obtained in the same manner as in Synthesis Example 1 except that 4.38 g (10.26 mmol) of n-hexyltriphenylphosphonium bromide was used instead of tributylhexadecylphosphonium bromide. Obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-13). Let the obtained compound be a dye (A-13).

Synthesis example 14
In Synthesis Example 1, 5.94 g of a red-purple solid was obtained in the same manner as in Synthesis Example 1 except that 3.93 g (10.26 mmol) of allyltriphenylphosphonium bromide was used instead of tributylhexadecylphosphonium bromide. . It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-14). Let the obtained compound be a dye (A-14).

Synthesis Example 15
In Synthesis Example 1, a reddish purple solid was obtained in the same manner as in Synthesis Example 1 except that 3.70 g (5.00 mmol) of tetramethylenebis (triphenylphosphonium) dibromide was used instead of tributylhexadecylphosphonium bromide. Obtained .73 g. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-15). Let the obtained compound be a dye (A-15).

Synthesis Example 16
In Synthesis Example 1, instead of Acid Red 52, a red-purple solid was obtained in the same manner as in Synthesis Example 1 except that 3.45 g (5.00 mmol) of Acid Blue 7 which is a triarylmethane acid dye was used. 6.49 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-16). Let the obtained compound be a dye (A-16).

Synthesis example 17
In Synthesis Example 1, instead of Acid Red 52, a dark blue solid was obtained in the same manner as in Synthesis Example 1 except that 2.83 g (5.00 mmol) of Acid Blue 1 which is a triarylmethane acid dye was used. 5.32 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-17). Let the obtained compound be a dye (A-17).

Synthesis Example 18
In Synthesis Example 1, instead of Acid Red 52, a dark blue solid was obtained in the same manner as in Synthesis Example 1 except that 4.27 g (5.00 mmol) of Acid Blue 90, which is a triarylmethane acid dye, was used. 7.67 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-18). Let the obtained compound be a dye (A-18).

Synthesis Example 19
In Synthesis Example 1, instead of Acid Red 52, a dark blue solid was obtained in the same manner as in Synthesis Example 1 except that 4.13 g (5.00 mmol) of Acid Blue 83, which is a triarylmethane acid dye, was used. 7.60 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-19). Let the obtained compound be a dye (A-19).

Synthesis Example 20
In Synthesis Example 1, instead of Acid Red 52, a dark blue solid was obtained in the same manner as in Synthesis Example 1 except that 2.00 g (2.50 mmol) of Acid Blue 93, which is a triarylmethane acid dye, was used. 5.34 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-20). Let the obtained compound be a dye (A-20).

Synthesis Example 21
In Synthesis Example 1, instead of Acid Red 52, a dark green solid was obtained in the same manner as in Synthesis Example 1 except that 3.08 g (5.00 mmol) of Acid Green 16 which is a triarylmethane acid dye was used. 6.79 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-21). Let the obtained compound be a dye (A-21).

Synthesis Example 22
In Synthesis Example 1, instead of Acid Red 52, 1.17 g (2.50 mmol) of Acid Blue 74, which is an indigo acid dye, was used in the same manner as Synthesis Example 1 except that 4. 65 g was obtained. It was confirmed by ¹ H-NMR spectrum (solvent: deuterated chloroform) that the obtained compound was a compound represented by the following formula (A-22). Let the obtained compound be a dye (A-22).

2. Evaluation of the present colorant The dye (A-1) was weighed and propylene glycol monomethyl ether was added so that the dye concentrations would be 0.1 mass%, 1 mass% and 10 mass%. These samples were stirred for 1 hour at 25 ° C. using a mix rotor, and then the dissolved state was immediately confirmed visually.
As a result, it was confirmed that the dye (A-1) was completely dissolved at 10% by mass with respect to propylene glycol monomethyl ether.
Similarly, the dye (A-2) to the dye (A-22), C.I. I. Acid Red 52, C.I. I. Acid Red 289, C.I. I. Acid Blue 7, C.I. I. Acid Blue 1, C.I. I. Acid Blue 90, C.I. I. Acid Blue 83, C.I. I. Acid Blue 93, C.I. I. Acid Green 16 and C.I. I. Acid Blue 74 was evaluated for solubility. As a result, the dye (A-2) to the dye (A-22) were completely dissolved at 10% by mass with respect to propylene glycol monomethyl ether. I. Acid Red 52, C.I. I. Acid Red 289, C.I. I. Acid Blue 7, C.I. I. Acid Blue 1, C.I. I. Acid Blue 90, C.I. I. Acid Blue 83, C.I. I. Acid Blue 93, C.I. I. Acid Green 16 and C.I. I. Acid Blue 74 did not dissolve even at a dye concentration of 0.1% by mass.
Moreover, 5% mass reduction | decrease temperature based on the thermogravimetric-differential-thermal simultaneous measurement analysis of dye (A-1)-dye (A-22) was all 250 degreeC or more. On the other hand, C.I. I. Acid Red 52, C.I. I. Acid Red 289, C.I. I. Acid Blue 7, C.I. I. Acid Blue 1, C.I. I. Acid Blue 90, C.I. I. Acid Blue 83, C.I. I. Acid Blue 93, C.I. I. Acid Green 16 and C.I. I. Acid Blue 74 had a 5% mass loss temperature of less than 200 ° C. based on thermogravimetric-differential thermal simultaneous measurement analysis. The higher the 5% mass reduction temperature, the higher the heat resistance of the colorant.

<Preparation of pigment dispersion>
Preparation Example 1
As a coloring agent, C.I. I. 15 parts by mass of Pigment Violet 23, 12.5 parts by mass of BYK-LPN21116 (manufactured by BYK) as a dispersant (solid content concentration 40% by mass), and 72.5 parts by mass of propylene glycol monomethyl ether acetate as a solvent Then, a pigment dispersion (a-1) was prepared by treatment with a bead mill.

<Preparation of dye solution>
Preparation Example 2
10 parts by mass of the dye (A-1) and 90 parts by mass of propylene glycol monomethyl ether acetate were mixed to prepare a dye solution (A-1).

Preparation Example 3
10 parts by mass of the dye (A-2) and 90 parts by mass of propylene glycol monomethyl ether acetate were mixed to prepare a dye solution (A-2).

Preparation Examples 4 to 23
Dye (A-3) to Dye (A-22) 10 parts by mass and propylene glycol monomethyl ether acetate 90 parts by mass were mixed to prepare Dye Solution (A-3) to Dye Solution (A-22).

<Synthesis of binder resin>
Synthesis Example 23
A flask equipped with a condenser and a stirrer was charged with 100 parts by mass of propylene glycol monomethyl ether acetate and purged with nitrogen. Heat to 80 ° C., and at the same temperature, 100 parts by mass of propylene glycol monomethyl ether acetate, 20 parts by mass of methacrylic acid, 10 parts by mass of styrene, 5 parts by mass of benzyl methacrylate, 15 parts by mass of 2-hydroxyethyl methacrylate, 2-ethylhexyl methacrylate 23 parts by mass, 12 parts by mass of N-phenylmaleimide, 15 parts by mass of succinic acid mono (2-acryloyloxyethyl) and 6 parts by mass of 2,2′-azobis (2,4-dimethylvaleronitrile) The solution was added dropwise over a period of time and polymerized for 2 hours while maintaining this temperature. Thereafter, the temperature of the reaction solution was raised to 100 ° C., and further polymerized for 1 hour to obtain a binder resin solution (solid content concentration: 33% by mass). The obtained binder resin had Mw of 12,200 and Mn of 6,500. This binder resin is referred to as “binder resin (B1)”.

Synthesis Example 24
A flask equipped with a condenser and a stirrer was charged with 144 parts by mass of cyclohexanone and purged with nitrogen. Heat to 80 ° C., and at the same temperature, 48 parts by mass of cyclohexanone, 28.8 parts by mass of methacrylic acid, 18 parts by mass of butyl methacrylate, 18 parts by mass of methyl methacrylate, 2-ethylhexyl EO modified acrylate (manufactured by Toagosei Co., Ltd.) , M-120), 18 parts by mass of cyclohexyl methacrylate and 37.2 parts by mass of glycerol methacrylate, and 48 parts by mass of cyclohexanone and 2,2′-azobis (2,4-dimethylvaleronitrile) 8.4. Part by mass of the mixed solution was added dropwise over 2 hours, and polymerization was performed for 1 hour while maintaining this temperature. Thereafter, the temperature of the reaction solution was raised to 90 ° C., and polymerization was further performed for 1 hour. Next, this solution was cooled to room temperature, and cyclohexanone was added so that a non-volatile content might be 33 mass%, and the resin (B2 ') solution was obtained. Obtained resin (B2 ') was Mw = 10700, Mn = 5600, Mw / Mn = 1.91.
Into a flask equipped with a condenser and a stirrer, the entire amount of the resin (B2 ′) solution was added and the temperature of the solution was raised to 90 ° C., and then 2-methacryloyloxyethyl isocyanate (Karenz MOI, Showa Denko KK) 34 A mixed solution of 3 parts by mass (95 mol% with respect to the number of moles of glycerol methacrylate) and 0.36 parts by mass of 4-methoxyphenol was added dropwise over 15 minutes under air bubbling conditions. The addition reaction was carried out for 5 hours. Next, this solution was cooled to room temperature, and cyclohexanone was added so that a non-volatile content might be 36 mass%, and the binder resin solution was obtained. The obtained binder resin was Mw = 1800, Mn = 6000, and Mw / Mn = 2.13. This binder resin is referred to as “binder resin (B2)”.

<Preparation and evaluation of coloring composition>
Example 1
13.5 parts by mass of the pigment dispersion (a-1), 7.2 parts by mass of the dye solution (A-1), 9.9 parts by mass of the binder resin (B1) solution as the binder resin, and manufactured by Toagosei Co., Ltd. as the crosslinking agent M-402 (mixture of dipentaerythritol hexaacrylate and dipentaerythritol pentaacrylate) 15.4 parts by mass, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butane-1 as a photopolymerization initiator -ON (Ciba Specialty Chemicals Co., Ltd., trade name IRGACURE 369) 1.8 parts by mass, NCI-930 (manufactured by ADEKA Co., Ltd.) 0.1 part by mass, MegaFac F-554 (DIC) as a fluorosurfactant Co., Ltd.) 0.2 parts by mass and propylene glycol monomethyl ether acetate as a solvent , Solid concentration 20 wt% of the coloring composition (CR1) was prepared.

The coloring composition (CR1) was applied on a glass substrate using a spin coater, and then pre-baked on an 80 ° C. hot plate for 10 minutes to form a coating film. The same operation was performed by changing the rotation speed of the spin coater to form three coating films having different film thicknesses.
Next, after cooling these substrates to room temperature, a high-pressure mercury lamp is used, and a radiation containing each wavelength of 365 nm, 405 nm, and 436 nm is applied to each coating film without using a photomask at an exposure dose of 2,000 J / m ² . And exposed. Then, shower development was performed for 90 seconds on these substrates by discharging a developer composed of a 0.04 mass% potassium hydroxide aqueous solution at 23 ° C. at a development pressure of 1 kgf / cm ² (nozzle diameter: 1 mm). . Thereafter, this substrate was washed with ultrapure water, air-dried, and then post-baked in a clean oven at 230 ° C. for 30 minutes to form a cured film for evaluation.

Evaluation of Chromaticity Characteristics For the three cured films obtained, a color analyzer (MCPD2000 manufactured by Otsuka Electronics Co., Ltd.) was used to measure the chromaticity coordinate values (x, y) and the stimulus value (Y) were measured. Moreover, the film thickness of the obtained cured film was measured using the alpha step IQ made from KLA-Tencor. From the measurement results, the chromaticity coordinate value x, the stimulus value (Y), and the film thickness at the chromaticity coordinate value y = 0.080 were obtained. The evaluation results are shown in Table 1. The larger the stimulus value (Y), the higher the light transmittance (brightness), and the thinner the film thickness, the higher the coloring power of the colorant.

Comparative Example 1
In Example 1, a colored composition was prepared in the same manner as in Example 1 except that the dye solution (A-2) was used instead of the dye solution (A-1). The resulting colored composition was evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

Examples 2-22
A colored composition was prepared in the same manner as in Example 1 except that the types and amounts of the pigment dispersion, the dye solution, and the binder resin solution were changed as shown in Table 1. The resulting colored composition was evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

Claims (7)

A color composition for a color filter comprising (A) a colorant, (B) a binder resin, and (C) a crosslinking agent,
(A) contains an acidic colorant having a phosphonium cation as a colorant,
The phosphonium cations are state, and are not represented by any one of the following general formula (1) or (2),
The acidic colorant is at least one selected from the group consisting of a xanthene chromophore having an anionic functional group represented by the following general formula (3-1) and an indigo chromophore having an anionic functional group. Have a chromophore,
Coloring composition for color filter.

[In Formula (1),
R < ¹ > -R < ⁴ > shows a hydrogen atom or an organic group mutually independently. However, at least one organic group of R ¹ to R ^4, the total number of carbon atoms of the organic group constituting R ¹ to R ⁴ is from 5 to 50, two are coupled out of R ¹ to R ⁴ To form a ring. ]

[In Formula (2),
R < ⁵ > -R < ¹⁰ > shows a hydrogen atom or an organic group mutually independently. However, two of R ^{5 to} R ¹⁰ may be bonded to form a ring. ;
X represents a divalent linking group. ]

[In Formula (3-1),
R ^{31 to} R ³⁴ are each independently a hydrogen atom, —R ⁵⁶ or an aromatic hydrocarbon group having 6 to 10 carbon atoms (provided that the hydrogen atom contained in the aromatic hydrocarbon group is a halogen atom, — R ⁵⁶ , —OH, —OR ⁵⁶ , —SO ₃ H, —SO ₃ M, —SO ₃ ⁻ , —COOH, —COO ⁻ , —CO ₂ R ⁵⁶ , —SO ₃ R ⁵⁶ , —SO ₂ NHR ⁵⁷ or -Optionally substituted with —SO ₂ NR ⁵⁷ R ⁵⁸ ).
R < ³⁵ > -R < ⁴⁰ > shows a hydrogen atom or a C1-C8 alkyl group mutually independently.
R ^{41 to} R ⁴⁵ are independently of each other —SO ₃ H, —SO ₃ M, —SO ₃ ⁻ , —COOH, —CO ₂ R ⁵⁶ , —SO ₃ R ⁵⁶ , —SO ₂ NHR ⁵⁷ or —SO. ₂ NR ⁵⁷ R ⁵⁸ is shown.
R ⁵⁶ represents a saturated hydrocarbon group having 1 to 10 carbon atoms (provided that the hydrogen atom contained in the saturated hydrocarbon group may be substituted with a halogen atom, and the methylene group contained in the saturated hydrocarbon group is , An oxygen atom, a carbonyl group or —NR ⁵⁶ — may be substituted).
R ⁵⁷ and R ⁵⁸ each 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 ⁵⁷ and R ⁵⁸ are bonded to each other. Or a substituted or unsubstituted heterocyclic group having 1 to 10 carbon atoms formed. However, the hydrogen atom contained in the alkyl group and cycloalkyl group may be substituted with a hydroxyl group, a halogen atom, -Z, -CH = CH ₂ or -CH = CHR ⁵⁶ , and the alkyl group and cycloalkyl The methylene group contained in the group may be substituted with an oxygen atom, a carbonyl group or —NR ⁵⁶ —, and the hydrogen atom contained in the heterocyclic group is substituted with —R ⁵⁶ , —OH or —Z. May be.
M represents a sodium atom or a potassium atom.
Z is an aromatic hydrocarbon group having 6 to 10 carbon atoms or an aromatic heterocyclic group having 5 to 10 carbon atoms (the hydrogen atom contained in the aromatic hydrocarbon group and aromatic heterocyclic group is —OH, R ⁵⁶ , —OR ⁵⁶ , —NO ₂ , —CH═CH ₂ , —CH═CHR ^56, or a halogen atom, which may be substituted.
Provided that at least one of R ³¹ to R ³⁴ is -COO ^- or -SO ₃ ^- or an aromatic hydrocarbon radical having, or at least one of R ⁴¹ to R ⁴⁵ -SO ₃ ^- is. ]   The coloring composition for a color filter according to claim 1, wherein the content ratio of the acidic coloring agent having the phosphonium cation is 10 to 80% by mass in all coloring agents.   The coloring composition for a color filter according to claim 1 or 2, wherein the organic group is a hydrocarbon group.   The coloring composition for color filters according to claim 1, wherein the organic group is an aliphatic hydrocarbon group. (B) The coloring composition for color filters of any one of Claims 1-4 in which binder resin contains the carboxyl group containing polymer which has a polymerizable unsaturated bond in a side chain. Comprising a colored layer containing an acidic colorant having a phosphonium cation,
The phosphonium cations are state, and are not represented by any one of the following general formula (1) or (2),
The acidic colorant is at least one selected from the group consisting of a xanthene chromophore having an anionic functional group represented by the following general formula (3-1) and an indigo chromophore having an anionic functional group. Have a chromophore,
Color filter.

[In Formula (1),
R < ¹ > -R < ⁴ > shows a hydrogen atom or an organic group mutually independently. However, at least one organic group of R ¹ to R ^4, the total number of carbon atoms of the organic group constituting R ¹ to R ⁴ is from 5 to 50, two are coupled out of R ¹ to R ⁴ To form a ring. ]

[In Formula (2),
R < ⁵ > -R < ¹⁰ > shows a hydrogen atom or an organic group mutually independently. However, two of R ^{5 to} R ¹⁰ may be bonded to form a ring. ;
X represents a divalent linking group. ]

[In Formula (3-1),
R ^{31 to} R ³⁴ are each independently a hydrogen atom, —R ⁵⁶ or an aromatic hydrocarbon group having 6 to 10 carbon atoms (provided that the hydrogen atom contained in the aromatic hydrocarbon group is a halogen atom, — R ⁵⁶ , —OH, —OR ⁵⁶ , —SO ₃ H, —SO ₃ M, —SO ₃ ⁻ , —COOH, —COO ⁻ , —CO ₂ R ⁵⁶ , —SO ₃ R ⁵⁶ , —SO ₂ NHR ⁵⁷ or -Optionally substituted with —SO ₂ NR ⁵⁷ R ⁵⁸ ).
R < ³⁵ > -R < ⁴⁰ > shows a hydrogen atom or a C1-C8 alkyl group mutually independently.
R ^{41 to} R ⁴⁵ are independently of each other —SO ₃ H, —SO ₃ M, —SO ₃ ⁻ , —COOH, —CO ₂ R ⁵⁶ , —SO ₃ R ⁵⁶ , —SO ₂ NHR ⁵⁷ or —SO. ₂ NR ⁵⁷ R ⁵⁸ is shown.
R ⁵⁶ represents a saturated hydrocarbon group having 1 to 10 carbon atoms (provided that the hydrogen atom contained in the saturated hydrocarbon group may be substituted with a halogen atom, and the methylene group contained in the saturated hydrocarbon group is , An oxygen atom, a carbonyl group or —NR ⁵⁶ — may be substituted).
R ⁵⁷ and R ⁵⁸ each 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 ⁵⁷ and R ⁵⁸ are bonded to each other. Or a substituted or unsubstituted heterocyclic group having 1 to 10 carbon atoms formed. However, the hydrogen atom contained in the alkyl group and cycloalkyl group may be substituted with a hydroxyl group, a halogen atom, -Z, -CH = CH ₂ or -CH = CHR ⁵⁶ , and the alkyl group and cycloalkyl The methylene group contained in the group may be substituted with an oxygen atom, a carbonyl group or —NR ⁵⁶ —, and the hydrogen atom contained in the heterocyclic group is substituted with —R ⁵⁶ , —OH or —Z. May be.
M represents a sodium atom or a potassium atom.
Z is an aromatic hydrocarbon group having 6 to 10 carbon atoms or an aromatic heterocyclic group having 5 to 10 carbon atoms (the hydrogen atom contained in the aromatic hydrocarbon group and aromatic heterocyclic group is —OH, R ⁵⁶ , —OR ⁵⁶ , —NO ₂ , —CH═CH ₂ , —CH═CHR ^56, or a halogen atom, which may be substituted.
Provided that at least one of R ³¹ to R ³⁴ is -COO ^- or -SO ₃ ^- or an aromatic hydrocarbon radical having, or at least one of R ⁴¹ to R ⁴⁵ -SO ₃ ^- is. ] A display device comprising the color filter according to claim 6 .