JP2003161823A - Pigment-dispersed resist for color filter, and the color filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pigment-dispersed resist for color filter, capable of obtaining a hardened film layer having high color purity and color density and proper transparency and heat resistance in a green pixel part and a color filter having the hardened film layer of the pigment-dispersed resist. <P>SOLUTION: The pigment-dispersed resist for color filter contains a pigment (A) containing a specific halogenated phthalocyanine (a) as essential components, a polymer (B) having 2-oxo-1,3-dioxolane-4-yl groups and acidic groups, and a compound having at least two ethylene unsaturated double bonds in the molecule, and the color filter has the hardened applied film layer of the pigment dispersion resist on a substrate. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a pigment-dispersed resist for color filters and a color filter having a cured coating layer of the pigment-dispersed resist for color filters on a substrate.

[0002]

2. Description of the Related Art A color filter is a cured coating layer (hereinafter referred to as "pixel") of a coloring composition corresponding to each color in each mesh of a mesh-shaped light-shielding thin film layer called a black matrix provided on a substrate. .) Are formed and arranged.

As a method for producing a colored pixel of a color filter, a pigment dispersion resist containing a photopolymerizable monomer and a photopolymerization initiator added to a coloring composition prepared by dispersing a pigment in a binder resin is coated on a substrate. Generally, a photolithography method is widely used in which a colored pattern obtained by drying, exposing through a photomask, and then developing is fixed. For example, in JP-A-2001-100413, a 2-oxo-1,3-dioxolan-4-yl group is introduced into a binder resin to react with a carboxyl group to finally consume unnecessary carboxylic acid, and A photosensitive resist for color filters has been proposed, which has improved heat resistance and solvent resistance by introducing a crosslinked structure generated by the reaction, and has excellent heat resistance, water resistance, solvent resistance, chemical resistance and the like. A coating film is obtained.

However, the green colorant used in this photosensitive resist is a conventional copper halide phthalocyanine colorant. It is known that this conventional halogenated copper phthalocyanine coloring agent uses bromine as a halogen, and a green color with a stronger yellow color is obtained as the bromination rate is higher, but in this case, a reddish color becomes stronger. There is a problem that the color is unstable and the transparency is lowered.

Recently, a color liquid crystal display, which is the largest use of color filters, has come to be used in a color monitor and a color television, and a color liquid crystal display is strongly required to have "color reproducibility" in addition to the conventionally required characteristics. I am Therefore, the colorant used for the color filter is also required to have high color purity and color density and high transparency. However, when a halogenated copper phthalocyanine whose coloration is unstable is used, it is difficult to satisfy these requirements only by introducing a cross-linking structure effective for improving the heat resistance of the colored pixel.

[0006]

An object of the present invention is to provide a pigment-dispersed resist for a color filter, which can provide a cured coating layer having high color purity and color density and excellent transparency and heat resistance in a green pixel portion. And a color filter having a cured coating film layer of this pigment-dispersed resist.

[0007]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventors have found that a pigment containing a halogenated phthalocyanine (a) represented by the following general formula (1) as an essential component ( A), a polymer (B) having a 2-oxo-1,3-dioxolan-4-yl group and an acidic group, and a compound (C) having at least two ethylenically unsaturated double bonds in the molecule. A photosensitive colored resin composition containing is suitable as a pigment-dispersed resist for color filters, and by using this, the green pixel portion has high color purity and color density, and is excellent in transparency and heat resistance. It was found that a color filter having a coating layer can be obtained, and the present invention has been completed.

That is, the present invention provides a pigment (A) containing a halogenated phthalocyanine (a) represented by the following general formula (1) as an essential component, a 2-oxo-1,3-dioxolan-4-yl group. And a polymer (B) having an acidic group, and a compound (C) having at least two ethylenically unsaturated double bonds in the molecule, a pigment-dispersed resist for a color filter. To do.

[Chemical 2] (In the formula, M is Al, Si, Sc, Ti, V, Fe, C
o, Ni, Zn, Ga, Ge, Y, Zr, Nb, In,
Represents Sn, Pb or two hydrogen atoms. X _{1 to} X ₁₆
Represents a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom or an iodine atom, and the total sum of these halogen atoms is 8 to 16
Is an integer. Y is a fluorine atom, a chlorine atom, a bromine atom,
Represents an iodine atom, an oxygen atom or a hydroxyl group, and m is 0 to 2
Represents the integer. )

The present invention also provides a color filter characterized by comprising a cured coating layer of the pigment dispersion resist for a color filter on a substrate.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. "Phthalocyanine (a)" means "halogenated phthalocyanine (a) represented by the general formula (1)".
And "a pigment (A) containing the halogenated phthalocyanine (a) represented by the general formula (1) as an essential component" is a "pigment (A)" and "2-oxo-1,3- A "polymer (B) having a dioxolan-4-yl group and an acidic group" is referred to as "polymer (B)", and "a compound (C) having at least two ethylenically unsaturated double bonds in the molecule". “Compound (C)” is abbreviated as “compound (C)”, and “pigment dispersion resist for color filter” is abbreviated as “pigment dispersion resist”.

The phthalocyanine (a) used in the present invention is
Al, Si, Sc, Ti, V, Fe, Co, Ni, Z
n, Ga, Ge, Y, Zr, Nb, In, Sn or P
A halogenated metal phthalocyanine having b as a central metal (M) or a halogenated metal-free phthalocyanine having two hydrogen atoms in place of the central metal (M). Among them, phthalocyanine having Al, Fe, Ni or Zn as a central metal (M) is particularly preferable, and Z is
The cured coating film of the pigment-dispersed resist of the present invention using phthalocyanine having n or Ni as the central metal (M) is particularly preferable because it has excellent color purity, color density, transparency and heat resistance. The cured coating film of the pigment-dispersed resist of the present invention using phthalocyanine having Al as the central metal (M) is preferable in terms of excellent transparency.

In the above general formula (1), (M) is 2
In the case of hydrogen atoms (in the case of metal-free phthalocyanine) and (M) is a divalent metal, m is 0 and there is no ligand Y. When (M) is a metal having a valence of 3 or more, the ligand Y is coordinated with (M). That is,
When (M) is a metal having a valence of 3 valences, one ligand Y having a valence of 1 valence is used, and when (M) is a metal having a valence of 4 valences, it has a valence of 1 valence. Two ligands or one ligand having a divalent valence is coordinated. For example, when (M) is Al, it becomes AlCl.

As the ligand Y, a fluorine atom, a chlorine atom,
Examples thereof include bromine atom, iodine atom, oxygen atom and hydroxyl group. When the ligand Y is a hydroxyl group, the dehydration reaction proceeds,
It may also form dimers or multimers. When the phthalocyanine (a) used in the present invention is simply described as X _n PcMY _m , when (M) is a metal having a valence of 3, a reaction of the following general formula (2) proceeds and X _n PcMOMPCX
It may form a dimer represented by _n . 2X _n PcMOH → X _n PcMOMPCX _n + H ₂ O (2)

When (M) is a metal having a valence of 4 or more, the reaction represented by the following general formula (3) proceeds and HOX _n P
sometimes forming a cMO _{(X n PcMO)} multimer represented by _z-2 X n PcMOH. sometimes forming a _{zX n PcM (OH) 2 →} HOX n PcMO (X n PcMO) z-2 X n P cMOH + (z-2) / 2 · H 2 O (3).

Further, when (M) is a metal having a valence of 4 or more and the ligand Y is a hydroxyl group, the dehydration reaction of the following general formula (4) may proceed to form a μ-oxo compound. Many. X _n PcM (OH) ₂ → X _n PcM = O + H ₂ O (4)

In the present invention, when the (M) is a metal having a valence of 3 or 4, the production method is simple and easily available. Therefore, a fluorine atom, a chlorine atom, a bromine atom or iodine is used. A phthalocyanine having an atom or an oxygen atom as a ligand is used. For example, when (M) is Al, A
lCl is used.

In the present invention, when the thickness of the green pigment-dispersed resist cured coating film layer is constant, the CIE color system chromaticity (Y, x, y value) having a large y value is regarded as "color purity. It's expensive. " Further, when the film thickness of the pigment-dispersed resist cured coating film is determined so that the x and y values are constant, a thin film thickness is referred to as "high color density", and a large Y value is referred to as "high color density". It is highly transparent. "

The phthalocyanine (a) has 8 to 16 fluorine, chlorine, and
It has a bromine or iodine atom. The substituted halogen atoms may be the same or different, but preferably have 8 or more bromine atoms and 1 or more chlorine atoms, and particularly 12 or more bromine atoms and chlorine atoms. Those having two or more have a highly transparent green color,
Suitable for green colorants for color filters.

The phthalocyanine (a) used in the present invention is
The half width of the spectral transmission spectrum is narrower than that of the conventional copper halide phthalocyanine, and the maximum transmittance thereof is also larger. This indicates that the phthalocyanine (a) exhibits a green color having high color purity and color density and high transparency as compared with the conventional halogenated copper phthalocyanine. Specifically, by using phthalocyanine (a) as an essential pigment, the wavelength (Tmax) at which the transmittance of the spectral transmission spectrum at 380 to 780 nm becomes maximum, which cannot be achieved by the conventional halogenated copper phthalocyanine.
Is 520 to 590 nm, the transmittance at Tmax is 70% or more, and the transmittance of the spectral transmission spectrum at a wavelength of 650 to 700 nm is 20% or less. A color filter having a green pixel can be easily and inexpensively obtained. be able to.

The phthalocyanine (a) can be produced by a known method for producing a halogenated metal phthalocyanine, such as the chlorosulfonic acid method or the halogenated phthalonitrile method.

In the pigment-dispersed resist of the present invention, a yellow pigment can be mixed and used as the pigment (A) in addition to the phthalocyanine (a). By changing the mixing ratio of the phthalocyanine (a) and the yellow pigment depending on the application, it is possible to adjust the hue to a desired hue.

Examples of the yellow pigment that can be used in the present invention include C.I. I. Pigment Yellow 83, C.I. I. Pigment Yellow 128, C.I. I. Pigment Yellow 1
38, C.I. I. Pigment Yellow 139, C.I. I. Pigment Yellow 150, C.I. I. Pigment Yellow 180, C.I. I. Pigment Yellow 185 and other yellow organic pigments.

These yellow pigments may be used alone or in combination of two or more. Among the above pigments, C.I. I. Pigment Yellow 83, C.I. I.
Pigment Yellow 138, C.I. I. Pigment Yellow 139, C.I. I. Pigment Yellow 150, C.I.
I. Pigment Yellow 185 is particularly preferable because it has excellent color purity and transparency.

The blending ratio of the yellow pigment can be appropriately selected according to the application, but when it is generally used for a color filter, it is in the range of 10 to 70% by weight based on the total of the phthalocyanine (a) and the yellow pigment. It is preferable that
More preferably, it is in the range of 30 to 60% by weight.

In general, the smaller the particle size of a pigment used in a pigment-dispersed resist is, the higher the transparency of a pixel portion of a color filter obtained by using it is. The viscosity of the composition may increase with time, thixotropy may strongly appear, and the pigment may aggregate to form secondary particles having a large particle size. It causes a drop. Therefore, the primary particle size of the pigment (A) used in the present invention is preferably in the range of 10 to 100 nm, particularly preferably in the range of 30 to 50 nm.

The pigment (A) used in the present invention includes, for example, a pigment dispersant (D), a solvent (E) and, if necessary, various additives, such as a ball mill, a sand mill, a bead mill and a three roll mill. , A paint conditioner, an attritor, a dispersion stirrer, an ultrasonic disperser, and the like to prepare a pigment dispersion composition, and the pigment dispersion composition, a polymer (B), a compound (C) Thus, the pigment-dispersed resist can be prepared by blending with the solvent (E), the photopolymerization initiator (F), other components and the like. The solvent used here for preparing the pigment dispersion composition and the solvent used as necessary for preparing the pigment dispersion resist may be the same or different in type.

As the pigment dispersant (D) used in the production of the pigment dispersion composition, various pigment dispersants can be used and are not particularly limited, but examples thereof include surfactants. An intermediate or derivative of a pigment, an intermediate or derivative of a dye, a resin type dispersant such as a polyamide resin, a polyurethane resin, a polyester resin, an acrylic resin, and the like. These pigment dispersants (D)
Among them, it is particularly preferable to use a pigment dispersant containing an acrylic polymer having an N, N-disubstituted amino group and an acidic group in the main chain or side chain. Examples of commercially available resin-type dispersants include "BYK-1" manufactured by BYK Chemie.
60 "," BYK-161 "," BYK-2001 ",
For example, there are “EFCA46” manufactured by EF Car Chemicals, and “AZISPER PB-814” manufactured by Ajinomoto Co., Inc. These dispersants (D) may be used alone or in combination of two or more.

Further, as the solvent (E) used in the production of the pigment dispersion composition, the polymer (B), the compound (C), the pigment dispersant (D), and other components to be blended if necessary. It is preferable to use a solvent capable of dissolving the components and stably dispersing the pigment (A). Examples of such a solvent include acetic acid ester solvents such as propylene glycol monomethyl ether acetate and propylene glycol monoethyl ether acetate, propionate solvents such as ethoxypropionate, and aromatic solvents such as toluene, xylene and methoxybenzene. , Butyl cellosolve, propylene glycol monomethyl ether, ether solvent such as diethylene glycol ethyl ether, diethylene glycol dimethyl ether, ketone solvent such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, aliphatic hydrocarbon solvent such as hexane, N, N-dimethylformamide, γ-butyrolactam, N-methyl-2-
Examples thereof include nitrogen compound solvents such as pyrrolidone, lactone solvents such as γ-butyrolactone, and carbamic acid esters. These solvents may be used alone or in combination of two or more.

The content of non-volatile components in the pigment dispersion composition is preferably in the range of 10 to 35% by weight. The content of the pigment (A) contained in the non-volatile matter is 8
The content of the pigment dispersant (D) contained in the non-volatile matter is preferably in the range of 2 to 15% by weight.

Next, the polymer (B) used in the present invention is 2
-Oxo-1,3-dioxolan-4-yl group (hereinafter,
It is called a cyclocarbonate group. ) And a polymer having an acidic group, and the cyclocarbonate group is represented by the following general formula (5).

[Chemical 3] (However, R < ₁ >, R < ₂ > and R < ₃ > in the formula may be the same or different and each represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.)

The polymer (B) is, for example, a monomer having at least one cyclocarbonate group and an ethylenically unsaturated double bond in the molecule (hereinafter referred to as a cyclocarbonate group-containing monomer), A monomer having at least one acidic group and an ethylenically unsaturated double bond in the molecule (hereinafter referred to as an acidic group-containing monomer) as an essential component, and further, if necessary, with these monomers. It is obtained by copolymerizing another copolymerizable monomer having an ethylenically unsaturated double bond (hereinafter referred to as a copolymerizable monomer).

Examples of the cyclocarbonate group-containing monomer include compounds represented by the following general formula (6).

[Chemical 4] (However, R in the formula represents a hydrogen atom or a methyl group,
₁ , R ₂ and R ₃ represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, which may be the same or different. In addition, a is an integer of 1 to 6. )

Specific examples of these include 2,3-carbonate propyl (meth) acrylate and 2-methyl-
2,3-carbonate propyl (meth) acrylate,
3,4-carbonate butyl (meth) acrylate, 3
-Methyl-3,4-carbonate butyl (meth) acrylate, 4-methyl-3,4-carbonate butyl (meth) acrylate, 3-methyl-3,4-carbonate butyl (meth) acrylate, 6,7-carbonate hexyl (Meth) acrylates such as (meth) acrylate, 5-ethyl-5,6-carbonate hexyl (meth) acrylate, and 7,8-carbonate octyl (meth) acrylate; 2,3-carbonate propyl vinyl ether, methyl-2, Examples include 3-carbonate propyl maleate and methyl-2,3-carbonate propyl crotonate. These cyclocarbonate group-containing monomers can be used alone or in combination of two or more.

Examples of the acidic group-containing monomer include ethylenically unsaturated mono-acids such as acrylic acid, methacrylic acid, coumaronic acid, itaconic acid, maleic acid and fumaric acid.
Or di-carboxylic acids; maleic acid monoalkyl ester, fumaric acid monoalkyl ester, itaconic acid monoalkyl ester; hydroxyl group-containing compound with phthalic anhydride,
Those obtained by adding an acid anhydride such as succinic anhydride and trimellitic anhydride; p-styrenecarboxylic acid, p-styrenesulfonic acid, p-hydroxystyrene, 2- (meth) acryloyloxyethyl phosphate and the like. To be Among them, it is preferable to use a monomer having a carboxyl group or a phenolic hydroxyl group, and a monomer having a carboxyl group is particularly preferable.

Examples of the copolymerizable monomer include, for example,
Methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, hepsyl (meth) acrylate, octyl (meth) acrylate, ( Meta)
Dodecyl acrylate, stearyl (meth) acrylate, and other (meth) acrylates having an alkyl group having 1 to 22 carbon atoms; cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, dimethacrylate (meth) acrylate (Meth) acrylic acid ester having an alicyclic alkyl group such as cyclopentanyl and (meth) acrylic acid dicyclopentenyloxyethyl; (meth) acrylic acid ester of tetrahydrofurfuryl alcohol and ε-caprolactone adduct;

Benzoyloxyethyl (meth) acrylate, benzyl (meth) acrylate, phenylethyl (meth) acrylate, phenoxyethyl (meth) acrylate, phenoxydiethylene glycol (meth) acrylate, 2- (meth) acrylic acid (Meth) acrylic acid ester having an aromatic ring such as hydroxy-3-phenoxypropyl; having a hydroxyalkyl group such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, glycerol (meth) acrylate (meth )
Acrylic ester; Lactone-modified hydroxyethyl (meth) acrylate;

Acrylamide, its alkyd-substituted amide; unsaturated dicarboxylic acid esters such as dimethyl fumarate, diethyl fumarate, dibutyl fumarate, dimethyl itaconate, dibutyl itaconate, methyl ethyl fumarate, methyl butyl fumarate, and methyl ethyl itaconate. And styrene derivatives such as styrene, α-methylstyrene and chlorostyrene. These copolymerizable monomers can be used alone or in combination of two or more.

Among the above-mentioned copolymerizable monomers, a (meth) acrylic acid ester having an aromatic ring is preferable, since a polymer (B) having excellent pigment dispersibility is obtained, and benzyl (meth) acrylate is preferable. Is particularly preferable.

Since the polymer (B) is excellent in heat resistance, light resistance, transparency, etc., it may be used in combination with a cyclocarbonate group-containing monomer, an acid group-containing monomer and, if necessary, in combination. A vinyl-based polymer obtained by using a vinyl-based monomer as a main component as the copolymerizable monomer is preferably an acrylic-based polymer obtained by using an acrylic-based monomer as a main component. The polymer is heat resistant,
It is preferable because it is excellent in light resistance and transparency.

The form of copolymerization in producing the polymer (B) is not particularly limited, but it can be produced by a radical polymerization method in the presence of a catalyst (polymerization initiator), for example. As the copolymerization method, known methods such as a bulk polymerization method, a solution polymerization method, a suspension polymerization method and an emulsion polymerization method can be used. The polymer (B) obtained may be any of a random copolymer, a block copolymer, a graft copolymer and the like.

Examples of the solvent that can be used in the solution polymerization method include the solvent (E) that can be used when preparing the above-mentioned pigment dispersion composition.

As the catalyst, known radical polymerization initiators can be used, for example, 2,2'-azobisisobutyronitrile, 2,2'-azobis- (2,4-dimethylvaleronitrile), Azo compounds such as 2,2′-azobis- (4-methoxy-2,4-dimethylvaleronitrile), benzoyl peroxide, lauroyl peroxide, t-butylperoxypivalate, 1,1′-bis- (t-butylperoxy) ) Organic peroxides such as cyclohexane, t-amylperoxy-2-ethylhexanoate and t-hexylperoxy-2-ethylhexanoate, hydrogen peroxide and the like can be mentioned.

The ratio of the cyclocarbonate group-containing monomer used in the production of the polymer (B) is not particularly limited, but among them, it is excellent in heat resistance, solvent solubility and pigment dispersibility. Since a pigment-dispersed resist is obtained, 1 to 100% by weight of the cyclocarbonate group-containing monomer, the acidic group-containing monomer, and, if necessary, the copolymerizable monomer used in combination are added. A range of 50% by weight is preferable, and a range of 2-40% by weight is particularly preferable.

The proportion of the acid group-containing monomer used in the production of the polymer (B) is not particularly limited, but above all, it has a suitable solubility in an alkali developing solution and a coating film. 100% by weight of the total amount of the cyclocarbonate group-containing monomer, the acidic group-containing monomer, and the copolymerizable monomer used in combination, if necessary, because a pigment-dispersed resist having an easy pattern formation can be obtained. On the other hand, the range of 3 to 40% by weight is preferable, and the range of 5 to 35% by weight is particularly preferable.

Further, when a copolymerizable monomer is used in combination in the production of the polymer (B), the use ratio thereof is not particularly limited, but among them, a cyclocarbonate group-containing monomer and an acidic group are preferable. Based on 100% by weight of the total amount of the contained monomer and the copolymerizable monomer used in combination as necessary,
The range of 10 to 96% by weight is preferable, and the range of 30 to 90% by weight is particularly preferable.

The acid value of the polymer (B) is not particularly limited as long as it can be developed with an alkali developing solution, but is preferably 20 to 250 mgKOH / g, and 50 to 1
50 mg KOH / g is particularly preferred.

Further, the molecular weight of the polymer (B) is not particularly limited, but since the coating properties such as heat resistance, light resistance and chemical resistance can be maintained, the number average molecular weight in terms of polystyrene (hereinafter referred to as Mn). ) Is preferably 2,000 or more, and above all, from the viewpoint of obtaining a pigment-dispersed resist which has an appropriate viscosity, is excellent in coating workability, and is capable of imparting a uniform and good coating film performance, 3,000 to 30, 000 is particularly preferable.

The ratio of the weight average molecular weight (hereinafter referred to as Mw) to Mn (Mw / Mn: molecular weight distribution) is not particularly limited, but it is preferably 6.0 or less, and among them, the viscosity is suitable and coating is performed. It is particularly preferably 5.0 or less because it provides a pigment-dispersed resist which is excellent in workability, can impart uniform and good coating film performance, and is also excellent in solubility in an alkali developing solution.

Next, the compound (C) will be described. Examples of the compound (C) include trimethylolethane triacrylate, trimethylolpropane triacrylate, trimethylolpropane diacrylate, neopentyl glycol di (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth). Acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, hexanediol di (meth) acrylate, trimethylolpropane tri (acryloyloxypropyl) ether, tri (acryloyloxyethyl) isocyanurate, tri ( Acryloyloxyethyl) cyanurate, glycerin tri (meth) acrylate, epoxy (meth) acrylate, urethane (meth ) Acrylate, polyester (meth) acrylate.

Examples of the epoxy (meth) acrylate include phenol / novolak type epoxy resin,
Examples thereof include a reaction product of an epoxy resin such as cresol / novolak type epoxy resin and bisphenol A type epoxy resin and (meth) acrylic acid.

Examples of the urethane (meth) acrylate include polyols (for example, ethylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polyethoxydiol of bisphenol A, polyester polyol, polybutadiene polyol, polycarbonate polyol). Etc.), organic polyisocyanates (for example, tolylene diisocyanate, xylylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, etc.), and hydroxyl group-containing (meth) acrylates (for example, 2-hydroxyethyl (meth) acrylate, 2- Hydroxypropyl (meth) acrylate, 1,
4-butanediol mono (meth) acrylate etc.) and the like.

Further, examples of the polyester (meth) acrylate include a reaction product of a polyester polyols, which is a reaction product of a polybasic acid compound or its anhydride with a polyol, and (meth) acrylic acid.
As the polybasic acid compound or its anhydride used here,
Examples thereof include maleic acid, succinic acid, adipic acid, isophthalic acid, phthalic acid, terephthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid and their anhydrides. Examples of polyols include ethylene glycol and propylene glycol. Examples thereof include 3-methyl-1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, trimethylolpropane, pentaerythritol and the like.

In the present invention, among the above compounds (C), compounds having 2 to 8 (meth) acryloyl groups are preferable, and trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipenta. Erythritol hexa (meth) acrylate and dipentaerythritol penta (meth) acrylate are particularly preferable because a pigment-dispersed resist having excellent photocuring sensitivity can be obtained. These compounds (C)
Can be used alone or in combination of two or more.

The compounding ratio of the compound (C) is 25 to 150 with respect to 100 parts by weight of the polymer (B), since a pigment-dispersed resist having good developability and excellent photocurability can be obtained.
The range of parts by weight is preferable, and the range of 50 to 150 parts by weight is particularly preferable. Even if the compound (C) itself is insoluble in alkali, it is mixed with the polymer (B) together with the pigment dispersion composition, and if necessary, the solvent (E), the photopolymerization initiator (F), When a pigment-dispersed resist is prepared by adding other components and used in a photolithography method, a portion of the pigment-dispersed resist coating film irradiated with ultraviolet rays or visible light is photocured to be an alkali developer. The part which is insoluble but is not irradiated is dissolved and removed in an alkali developing solution and developed.

As the photopolymerization initiator (F), various photopolymerization initiators can be used, for example, benzophenone, 4,
Benzophenos such as 4'-bismethylaminobenzophenone and Michler's ketone; xanthones such as xanthone and thioxanthone; p-dimethylaminoacetophenone, benzyl-4-dimethylaminobenzoate, 4-
Bis-trichloromethyl-6- (4-ethoxy) phenyl-S-triazine, 2-amylanthraquinone, β-
Examples thereof include chloranthraquinone and biimidazole.

Commercially available photopolymerization initiators (F) include, for example, "IRGACURE-184" and "IRGACURE-3" manufactured by Ciba Specialty Chemicals.
69 "," Darocur-1173 ", BASF's" Lucirin-TPO ", Nippon Kayaku's" Kayacure DET "
X "," Kayacure OA "," Vicure 10 "," Vicure 55 "by Stoffer," Trigonal PI "by Akzo," Sandray 100 "by Sando
0 ”,“ Deep ”manufactured by Upjohn, and“ Biimidazole ”manufactured by Kurogane Kasei.

Various photosensitizers may be used in combination with the photopolymerization initiator (F). Examples of the photosensitizer include amines, ureas, compounds having a sulfur atom, compounds having a phosphorus atom, compounds having a chlorine atom, nitriles, and other compounds having a nitrogen atom. These may be used alone or in combination of two or more.

The compounding ratio of the photopolymerization initiator (F) is not particularly limited, but it has a high photosensitivity at the time of photocuring, and the photopolymerization initiator (when the coating film of the pigment dispersion resist is dried ( Since it is possible to prevent the physical properties of the coating film from being deteriorated due to the precipitation of crystals of F), 0.1 to 100 parts by weight of compound (C) is used.
A range of 30 parts by weight is preferred.

Further, in the pigment-dispersed resist of the present invention, a ring-opening catalyst can be used in order to open the cyclocarbonate group and accelerate the crosslinking reaction. As the ring opening catalyst, various cyclocarbonate group ring opening catalysts and epoxy group ring opening catalysts can be used.

Furthermore, the pigment-dispersed resist of the present invention comprises
If necessary, as long as the effects of the present invention are not impaired, pigment derivatives, dyes, resins, coupling agents, leveling agents,
Known and commonly used additives such as antifoaming agents, antioxidants and stabilizers can be added.

The pigment-dispersed resist of the present invention is compounded with pigment (A), polymer (B), compound (C), pigment dispersant (D), solvent (E), photopolymerization initiator (F). And the content of the pigment (A) is 4 to 12% by weight.
And the content of the polymer (B) is 3 to 15% by weight, the content of the compound (C) is 0.8 to 23% by weight, and the total content of the nonvolatile components is 20 to 30% by weight. Is preferable, and the content of the pigment dispersant (D) is 0.8 to
The content of the photopolymerization initiator (F) is 0.1 to 7 at 9% by weight.
Especially preferred is one which is wt%.

Generally, a color filter is manufactured through the following steps. The pigment-dispersed resist is applied to the entire surface of the color filter substrate on which the black matrix is provided, dried by heating (pre-baked), irradiated with ultraviolet rays or visible light through a photomask, and developed to develop the pigment-dispersed resist in the pixel area. To form a photocured coating layer. Then, if necessary, heat treatment (post bake)
Then, the photocurable coating film layer of the pigment-dispersed resist can be further thermally cured. The same operation is repeated three times for each color to create a color filter having red, green, and blue (or cyan, magenta, and yellow) pixels at predetermined positions.

The method for producing the color filter of the present invention will be described below in more detail in the order of steps by taking the above-mentioned general production method as an example, but the present invention is not limited thereto.

The method for applying the pigment-dispersed resist of the present invention to the surface of the color filter substrate is not particularly limited. As a coating method, for example, a printing method, a spray method, a roll coating method, a bar coating method, a curtain coating method, a spin coating method or the like can be used.

The drying conditions for the coating film of the pigment-dispersed resist applied on the color filter substrate are usually 50 to 150 ° C.
It takes about 15 minutes.

Various kinds of energy rays can be used as the light used for photocuring the pigment-dispersed resist coating film.
It is preferred to use UV or visible light in the wavelength range from ˜500 nm. Above all, it is particularly preferable to use ultraviolet rays having a short wavelength and high energy. As the light source of ultraviolet rays or visible light, those widely used in the field of photofabrication can be used, for example, a low pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, a chemical lamp,
Examples thereof include a black light lamp, a mercury-xenon lamp, an excimer lamp, a short arc lamp, a helium / cadmium laser, an argon laser, and a THG or FHG light laser using an Nd-YAG laser. When a laser is used as a light source, a pixel pattern can be directly drawn on the pigment-dispersed resist coating film without using a photomask.

Since the pigment-dispersed resist of the present invention has sensitivity not only to the above-mentioned light but also to the electron beam, it is possible to draw a pixel pattern directly on the pigment-dispersed resist coating film with the electron beam, similarly to the laser. You can also In this case, it is not always necessary to mix the photopolymerization initiator (F) in the photocurable composition.

As an alkali developing solution used for developing after the pixel pattern is baked by irradiating the coating film of the pigment-dispersed resist with light, for example, sodium hydroxide, potassium hydroxide, sodium carbonate, trimethylammonium hydroxide, etc. Aqueous solution and the like can be used. A suitable amount of a water-soluble organic solvent such as methanol, ethanol and isopropanol, and a surfactant may be added to the alkaline developer.

The developing method is a puddle method, a dipping method,
Any of a spray method and the like may be used. After development, it is washed with water and dried.

The pigment-dispersed resist of the present invention is for a green pixel portion. Generally, the obtained substrate having a photocurable coating film layer is heated at 100 to 280 ° C. by a heating device such as a hot plate or an oven. By heat-treating (post-baking) for a specified time, the volatile components in the coating film are removed, and at the same time, the unreacted ethylenically unsaturated double bond remaining in the photo-curing coating film of the pigment dispersion resist is thermally cured. Then, the same operation is repeated three times for each color to form a color filter having a photocurable coating film layer of a pigment dispersion resist of red, green, and blue on a pixel portion at a predetermined position, respectively.

The green pixel portion of the color filter of the present invention obtained through the above steps is excellent in transparency, color purity and color density.

[0072]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples. "Part" and "%"
Represents “parts by weight” and “% by weight”, respectively, unless otherwise specified.

Production Example 1 [Preparation of Polymer (B)] Propylene glycol monomethyl ether acetate (hereinafter abbreviated as PGMAc) was placed in a four-necked flask equipped with a thermometer, a reflux condenser, a stirrer and a nitrogen gas inlet. ) 425.0 parts was charged, the temperature was raised to 90 ° C. with stirring, and then 82.0 parts of 2,3-carbonate propyl methacrylate (hereinafter abbreviated as CPMA), methacrylic acid 38.0 parts, and benzyl methacrylate. (Hereinafter, abbreviated as BZMA.) 210.0 parts, PGMAc
A mixed solution of 97.0 parts and 16.5 parts of t-butylperoxy-2-ethylhexanate (hereinafter abbreviated as PO) was added dropwise over 1 hour. 90 after the dropping
After keeping at 0 ° C. for 2 hours, 1.7 parts of P—O was added, and the mixture was further reacted at the same temperature for 7 hours to obtain an acid value of the resin solid content (acid content present in 1 g of the sample was determined by The number of milligrams of potassium hydroxide needed to settle is 75 mgK
An OH / g polymer solution (B-1) was obtained. The obtained polymer solution (B-1) has a nonvolatile content (107.5 ° C., residual resin weight% after drying for 1 hour) of 40.7%, a Gardner viscosity of T to U, and a polystyrene-equivalent number average molecular weight. Is 5,3
00 and Mw / Mn were 2.29.

Comparative Production Example 1 (Preparation of Comparative Copolymer) The mixed solution to be dropped was 38.0 parts of methacrylic acid and BZ.
MA282.0 parts, PGMAc 97.0 parts and P-O
A comparative copolymer solution (H-1) having an acid value of the resin solid content of 75 mgKOH / g was obtained in the same manner as in Production Example 1 except that the mixed solution was changed to 16.5 parts. The obtained copolymer solution had a nonvolatile content of 40.7%, a Gardner viscosity of H, a number average molecular weight of 4,800, and an Mw / Mn of 2.40.

Example 1 15 parts of zinc halide phthalocyanine having an average primary particle diameter of 40 nm and the following average composition was placed in a high speed disperser "TSC-6H" manufactured by Igarashi Kikai Seisakusho Co., Ltd., which was charged with zirconia beads having a diameter of 0.5 mm. 4.5 parts of acrylic dispersant "BYK-2001" manufactured by BYK Chemie and PGMAc80.
5 parts were charged and stirred at 2000 rpm for 8 hours to obtain a green pigment dispersion composition (G-1).

<Average composition of halogenated zinc phthalocyanine> In the general formula (1), M, Y, X and m are as follows. M: Zn Y: None (n = 0) X: Bromine atom (Substitution number 13), Chlorine atom (Substitution number 2) m: 15

Next, a high-speed disperser "TSC-6H" charged with zirconia beads having a diameter of 0.5 mm was used to prepare C.I. I. Pigment Yellow 150
15 parts, BYK Chemie acrylic dispersant "BYK
4.5 parts of -2001 "and 80.5 parts of PGMAc were charged and stirred at 2000 rpm for 8 hours to obtain a yellow pigment dispersion composition (Y-1).

53 parts of the green pigment dispersion composition (G-1) and 47 parts of the yellow pigment composition (Y-1) were mixed to obtain a pigment dispersion composition for a color filter used in the present invention.

Pigment dispersion composition 10 for the color filter
0 part, polymer solution (B-1) 31.3 parts, dipentaerythritol hexaacrylate (hereinafter abbreviated as DPHA) 12.5 parts, Ciba Specialty Chemicals photopolymerization initiator "Irgacure # 369". Pore size 1.0 after mixing 0.3 parts and 17.1 parts PGMAc.
The pigment-dispersed resist for a color filter of the present invention was obtained by filtering using a μm filter.

Example 2 A green pigment dispersion composition (G-2) and a green pigment dispersion composition (G-2) were prepared in the same manner as in Example 1 except that 15 parts of halogenated nickel phthalocyanine having the following average composition was used instead of 15 parts of zinc halide phthalocyanine. Got

<Average Composition of Halogenated Nickel Phthalocyanine> In the general formula (1), M, Y, X and m are as follows. M: Ni Y: None (n = 0) X: Bromine atom (Substitution number 13), Chlorine atom (Substitution number 2) m: 15

45 parts of the green pigment composition (G-2) and 55 parts of the yellow pigment composition (Y-1) obtained in Example 1 were mixed to prepare a pigment dispersion composition for a color filter used in the present invention. Obtained.

Next, 100 parts of the pigment dispersion composition for the color filter, 31.3 parts of the polymer solution (B-1), DP
After mixing 12.5 parts of HA, 0.3 part of "Irgacure # 369" and 17.1 part of PGMAc, the pore size was 1.0.
The pigment-dispersed resist for color filters of the present invention was obtained by filtering using a filter of μm.

Comparative Example 1 A green pigment dispersion composition (G) was prepared in the same manner as in Example 1 except that 15 parts of halogenated copper phthalocyanine having the following average composition was used instead of 15 parts of zinc halide phthalocyanine.
-3) was obtained.

<Average Composition of Halogenated Copper Phthalocyanine> In the general formula (1), M, Y, X and m are as follows. M: Cu Y: None (n = 0) X: Bromine atom (Substitution number 13), Chlorine atom (Substitution number 2) m: 15

Then, the green pigment dispersion composition (G-3) 6
0 parts, yellow pigment dispersion composition (Y-1) 4 obtained in Example 1
0 parts, Dainippon Ink and Chemicals, Inc. Carboxyl group-containing alkali-soluble acrylic resin "EXECEDIC LC-2"
95 "31.3 parts, DPHA 12.5 parts," Irgacure # 369 "0.3 parts and PGMAc 17.1 parts were mixed and then filtered using a filter having a pore size of 1.0 μm to obtain a pigment dispersion resist for comparison. Got

Comparative Example 2 Instead of the polymer solution (B-1), a copolymer solution (H-
A pigment-dispersed resist for comparison was obtained in the same manner as in Example 1 except that 1) was used.

Test Examples 1 and 2 and Comparative Test Examples 1 and 2 The pigment dispersion resist for color filter of the present invention obtained in the above Examples 1 and 2, and the pigment dispersion for comparison obtained in Comparative Examples 1 and 2. The resist was subjected to the following tests, and the results and evaluations are shown in Table 1 and FIG.

<Color Density Test of Pigment-Dispersed Resist Cured Coating Layer> Each pigment-dispersed resist was dropped on a glass plate and a spin coater was used to post-bake the CIE coloring system color of the pigment-dispersed resist cured coating layer. After spin-coating so that the x value and the y value in the degree are x = 0.260 and y = 0.630, predrying was performed at 60 ° C. for 5 minutes and prebaking was performed to form a pigment-dispersed resist coating layer. . Each of the obtained pigment-dispersed resist coating layers was passed through a photomask for a color filter to obtain 0.1 J / cm ² using a high pressure mercury lamp.
After irradiating with the light of
AITES alkaline developer "IDI9A" kept at ℃
I "(tetramethylammonium hydroxide-based developer) to uncover the pigment-dispersed resist coating film in the unexposed area and develop it. It was washed with pure water until the washing liquid became neutral, air-dried, and then post-baked at 250 ° C. for 30 minutes to thermally cure the unreacted DPHA remaining in the photocured coating layer of the pigment dispersion resist. A color density test sample was prepared. The CI of the pigment-dispersed resist cured coating layer
E Color development system chromaticity is "Olympus Microspectrophotometer" O
It measured using "SP-SP-200".

For each color density test sample, the film thickness of the pigment-dispersed resist cured coating film layer after post-baking was measured using a surface shape measuring device "DEKTAK3" manufactured by Nippon Vacuum Technology Co., Ltd. It was evaluated that the thinner the film thickness where x = 0.260 and y = 0.630, the higher the color density. The results are shown in Table 1.

<Transparency Test of Pigment-Dispersed Resist Cured Coating Layer> The pigment-dispersed resist cured coating layer of the above-mentioned color density test sample was analyzed by a microspectrophotometer “OSP-SP-20
0 ”was used to measure the Y value in the CIE color system chromaticity. The larger the Y value, the higher the transparency. The results are shown in Table 1.

<Color Purity Test of Pigment-Dispersed Resist Cured Coating Layer> Each pigment-dispersed resist was dropped on a glass plate and spin-coated using a spin coater. The subsequent steps are the method for preparing a sample for color density test. Similarly, the thickness of the pigment-dispersed resist cured coating layer after post-baking is 2.0,
Samples for color purity test of 2.5 and 3.0 μm were prepared.

Regarding the pigment-dispersed resist cured coating layer of the sample for color purity test, a microspectrophotometer "OSP-SP-2" was used.
00 ”was used to measure the y value in the CIE color development system.
The results are shown in Fig. 1. It was evaluated that the higher the y value, the higher the color purity.

<Heat Resistance Test of Pigment-Dispersed Resist Cured Coating Layer> Regarding the pigment-dispersed resist cured coating layer of the above-mentioned color density test sample, a microspectrophotometer “OSP-SP-20”
0 ”was used to measure the Y value in the chromaticity of the CIE color development system (the Y value in this case is Y1). Next, after heating the cured coating film at 280 ° C. for 30 minutes, the Y value of the cured coating film was measured using the above-mentioned apparatus (Y value in this case is Y
2). The heat resistance of the cured coating film was evaluated by the difference ΔY between Y1 and Y2. If this ΔY is less than 0.5, ○,
Those with a value of 0.5 or more were marked with x.

[0095]

[Table 1]

In the results shown in Table 1, the green pixel portion of the color filter having the pigment-dispersed resist-cured coating layer using the pigment (A), the polymer (B) and the compound (C) was a halogenated copper phthalocyanine. Compared with the case where a yellow pigment is used, x = 0.260 and y = 0.630 have a thin film thickness, which is excellent in color density, and a large Y value makes it clear that transparency is high. is there.

Further, in FIG. 1, the green pixel portion of the color filter having the pigment-dispersed resist cured coating layer using the pigment (A), the polymer (B) and the compound (C) is
Compared to the case where the halogenated copper phthalocyanine and the yellow pigment are used, the y value is large at the same film thickness, so that it is clear that the color purity is also excellent.

Further, in the results of Table 1, the green pixel portion of the color filter having the pigment-dispersed resist cured coating layer using the pigment (A), the polymer (B) and the compound (C) is a cyclocarbonate group. In comparison with the case of using the comparative copolymer containing no γ, ΔY is small and 0.
Since it is less than 5, it is clear that it has excellent heat resistance.

[0099]

By using the pigment-dispersed resist for a color filter of the present invention, a color filter having a cured coating layer having high color purity and color density and excellent transparency and heat resistance in the green pixel portion can be obtained. can get.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between a film thickness of a pigment-dispersed resist cured coating layer and ay value.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 26, 2001 (2001.12.
26)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Chemical 1] (In the formula, M is Al, Si, Sc, Ti, V, Fe, C
o, Ni, Zn, Ga, Ge, Y, Zr, Nb, In,
Represents Sn, Pb or two hydrogen atoms. X _{1 to} X ₁₆
Represents a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom or an iodine atom, and the total sum of these halogen atoms is 8 to 16
Is an integer. Y is a fluorine atom, a chlorine atom, a bromine atom,
Represents an iodine atom, an oxygen atom or a hydroxyl group, and m is 0 to 2
Represents the integer. )

Wherein said pigment (A), 2-oxo-1,
A polymer (B) having a 3-dioxolan-4-yl group and an acidic group, a compound (C) having at least two ethylenically unsaturated double bonds in the molecule, a pigment dispersant (D), The solvent (E) and the photopolymerization initiator (F) are contained as essential components, the content of the pigment (A) is 4 to 12% by weight, and the content of the polymer (B) is 3 Content of the compound (C) is 0.8 to 23% by weight.
The pigment-dispersed resist for a color filter according to any one of claims 1 to 5 , wherein the total content of non-volatile components is 20 to 30% by weight.

12. A color filter having a cured coating film layer of the pigment dispersion resist for a color filter according to any one of claims 1 to 11 on a substrate.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

However, a conventional halogenated copper phthalocyanine colorant is used as the green colorant used in this photosensitive resist. This conventional copper halide phthalocyanine colorant uses bromine as the halogen,
It is known that the higher the bromination rate is, the more yellowish green color can be obtained, but in this case, the tint is unstable, such as the reddishness becoming stronger, and there is a problem such as a decrease in transparency. was there.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

When (M) is a metal having a valence of 4 or more, the reaction represented by the following general formula (3) proceeds and HOX _n P
sometimes forming a cMO _{(X n PcMO)} multimer represented by _z-2 X n PcMOH. zX _n PcM (OH) ₂ → HOX _n PcMO (X _n PcMO) _z-2 X _n P cMOH + (z-2) / 2 · H ₂ O (3)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03F 7/004 501 G03F 7/004 501 505 505 7/027 502 7/027 502 7/033 7/033 ( 72) Inventor Masaaki Kishimoto 3-7-19 Ayukawa, Ibaraki-shi, Osaka (72) Inventor Yoshiro Yamaguchi 3-3-4-2 Kishiminami, Suita-shi, Osaka F-term (reference) 2H025 AA10 AB13 AC01 AD01 BC14 BC42 BC51 BC63 BC74 CA01 CA28 CB14 CB41 CB43 CC03 CC12 CC20 FA03 FA17 FA29 2H048 BA02 BA45 BA48 BB02 BB42 2H091 FA02 FB02 FB12 FC10 FD06 LA04 LA18 4J011 AA05 PA43 PA69 PB25 4J026 AA17 AA20 AA21 AA31 AA43 AA44 AA45 AA48 AA50 AA53 AA54 AA55 BA28 BA40 BA50 DB36 GA07

Claims (10)

[Claims] 1. A pigment (A) containing a halogenated phthalocyanine (a) represented by the following general formula (1) as an essential component, a 2-oxo-1,3-dioxolan-4-yl group and an acidic group. A pigment-dispersed resist for a color filter, which comprises the polymer (B) and a compound (C) having at least two ethylenically unsaturated double bonds in the molecule. [Chemical 1] (In the formula, M is Al, Si, Sc, Ti, V, Fe, C
o, Ni, Zn, Ga, Ge, Y, Zr, Nb, In,
Represents Sn, Pb or two hydrogen atoms. X _{1 to} X ₁₆
Represents a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom or an iodine atom, and the total sum of these halogen atoms is 8 to 16
Is an integer. Y is a fluorine atom, a chlorine atom, a bromine atom,
Represents an iodine atom, an oxygen atom or a hydroxyl group, and m is 0 to 2
Represents the integer. ) 2. The pigment-dispersed resist for a color filter according to claim 1, wherein the polymer (B) is a polymer having a carboxyl group as an acidic group. 3. The pigment-dispersed resist for a color filter according to claim 2, wherein the polymer (B) is a vinyl polymer. 4. The pigment-dispersed resist for a color filter according to claim 3, wherein the polymer (B) is an acrylic polymer. 5. The pigment-dispersed resist for a color filter according to claim 4, wherein the polymer (B) is a copolymer using an aromatic ring-containing (meth) acrylic acid ester as an essential component. 6. The color filter according to any one of claims 1 to 5, wherein the halogenated phthalocyanine (a) represented by the general formula (1) is a halogenated nickel phthalocyanine or a halogenated zinc phthalocyanine. Pigment dispersion resist. 7. The pigment dispersion for a color filter according to claim 6, wherein the halogenated nickel phthalocyanine or zinc phthalocyanine is a phthalocyanine halogenated with 8 or more bromine atoms and 1 or more chlorine atoms. Resist. 8. The pigment (A) and a pigment dispersant (D).
And a solvent (E) are mixed as essential components to obtain a pigment dispersion composition, and 2-oxo-1,3-dioxolane-
A polymer (B) having a 4-yl group and an acidic group and a compound (C) having at least two ethylenically unsaturated double bonds in the molecule are blended as essential components. The pigment-dispersed resist for a color filter according to claim 1. 9. The pigment (A) and 2-oxo-1,3
-A polymer (B) having a dioxolan-4-yl group and an acidic group, a compound (C) having at least two ethylenically unsaturated double bonds in the molecule, and a pigment dispersant (D).
And a solvent (E) and a photopolymerization initiator (F) as essential components, and the content of the pigment (A) is 4 to 1
2% by weight, the content of the polymer (B) is 3 to 15% by weight.
The pigment dispersion for a color filter according to claim 1 or 6, wherein the content of the compound (C) is 0.8 to 23% by weight, and the total content of the nonvolatile components is 20 to 30% by weight. Resist. 10. A substrate according to any one of claims 1 to 9.
Item 8. A color filter having a cured coating film layer of the pigment-dispersed resist for a color filter according to item.