JP2003192947A - Ink composition for inkjet recording, used for color filter, and color filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink composition for inkjet recording, which is used for a color filter and can give a cured coating layer having high color purity and high color density at the green pixel part, and excellent in transparency and heat resistance, and a color filter having a colored cured coating layer of the ink composition. <P>SOLUTION: The ink composition contains a pigment (A) containing a specified halogenated phthalocyanine (a) as the essential constituent, and a polymer (B) having a 2-oxo-1,3-dioxolan-4-yl group and an acidic group. The color filter has a cured coating layer of the ink composition on a base plate. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an inkjet ink composition for a color filter having excellent durability, which is suitable for applications requiring durability after undergoing a pattern forming step by an inkjet method. The present invention relates to a color filter having a colored cured coating film layer of an inkjet ink composition for a color filter.

[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.

A method of forming a color filter by an ink jet method is disclosed in, for example, JP-A-59-75205 and JP-A-63-294503, but since the colorant is a dye type, these The color filter obtained by the method has poor heat resistance.

Therefore, in JP-A-10-316721, heat resistance is improved by a crosslinked structure in which an alicyclic epoxy group is introduced into a binder resin used in a coloring composition for a color filter and reacted with a carboxyl group. It is proposed to try.

However, although this coloring composition has good coating film physical properties in the cured image portion, its reactivity between the epoxy group and the carboxyl group is too high, and therefore the stability during the manufacturing process and during storage is unsatisfactory. It is sufficient, and it is difficult to achieve both the stability and the physical properties of the cured coating film.

On the other hand, as a colorant used for a color filter, a pigment having excellent light resistance has been mainly used in place of a dye which has been widely used conventionally.

However, this ink jet ink has
A halogenated copper phthalocyanine colorant is used as a green colorant. It is known that this halogenated copper phthalocyanine colorant uses bromine as the halogen, and a green color with a stronger yellow tint is obtained as the bromination rate is higher. There were problems such as unstable taste and reduced transparency.

Recently, the color liquid crystal display, which is the largest use of color filters, has come to be used in color monitors and color televisions, and color liquid crystal displays are 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.

[0009]

An object of the present invention is to provide an ink jet ink composition for a color filter, which provides a cured coating layer having high color purity and color density, excellent transparency and heat resistance in a green pixel portion. And a color filter having a colored cured coating film layer of the inkjet ink composition.

[0010]

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 ( An inkjet ink composition containing A) and a polymer (B) having a 2-oxo-1,3-dioxolan-4-yl group and an acidic group is suitable as an inkjet ink composition for a color filter. It was found that a color filter having a cured coating layer having high color purity and color density and excellent transparency and heat resistance can be obtained in the green pixel portion by using .

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, and 2-oxo-1,3-dioxolan-4-yl. The present invention provides an inkjet ink composition for a color filter, which comprises a polymer (B) having a group and an acidic group.

[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 represent 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 an integer of 8 to 16. Y represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, an oxygen atom or a hydroxyl group, and m represents an integer of 0-2. )

The present invention also provides a color filter comprising a colored cured coating film layer of the ink jet ink composition for a color filter on a substrate.

[0013]

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- The "polymer (B) having a dioxolan-4-yl group and an acidic group" is abbreviated as "polymer (B)", and the "ink jet ink composition for color filter" is abbreviated as "ink jet ink". To do.

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 inkjet ink 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 inkjet ink of the present invention using phthalocyanine having Al as the central metal (M) is preferable because of its 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 Pc
Sometimes form multimers represented by _{MO (X n PcMO) z-} 2 X n PcMOH. zX _n PcM (OH) ₂ → HOX _n PcMO (X _n PcMO) _z-2 X _n PcMOH + (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 film thickness of the green ink-jet ink cured coating film layer is constant, the one having a large y value of the CIE color development system chromaticity (Y, x, y value) has a large "color purity". It's expensive. " Further, when the film thickness of the ink-jet ink 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) includes 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 and are suitable as a green colorant 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 ink-jet ink 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 which 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 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.

Generally, the smaller the particle size of a pigment used in an inkjet ink, the higher the transparency of a pixel portion of a color filter obtained by using the pigment. However, when it is too small, the pigment dispersion composition is large. The viscosity of the product may increase over time, thixotropy may appear strongly, and the pigment may aggregate to form secondary particles with a large particle size.In this case also, the transparency of the color filter pixel part decreases. Cause Therefore, the primary particle diameter of the pigment (A) used in the present invention is 10 to 100 n.
The range of m is preferable, and the range of 30 to 50 nm is particularly preferable.

The pigment (A) used in the present invention includes, for example, a pigment dispersant (C), a solvent (D) 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 obtain a pigment dispersion composition, and the pigment dispersion composition, the polymer (B), and, if necessary, the solvent (D ),
The inkjet ink can be prepared by blending with other components. The solvent used here for preparing the pigment dispersion composition and the solvent used as necessary for preparing the inkjet ink may be the same or different in type.

As the pigment dispersant (C) used in the production of the pigment dispersion composition, various pigment dispersants can be used and are not particularly limited, but examples thereof include a surfactant. 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 (C)
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. Commercially available resin-type dispersants include, for example, "Disperbic 130", "Disperbic 161", "Disperbic 162", "Disperbic 163" manufactured by Big Chemie,
"Dispersevic 170", "Dispersebic 20"
00 "," Dispervik 2001 "," EFCA 46 "," EFCA 47 "manufactured by EF Car Chemicals," SOLSPERSE 32550 "," SOLSPERSE 2 "manufactured by Zeneca.
4000 "," Ajisper PB811 "manufactured by Ajinomoto Co., Inc.
Examples include "Azispar PB814". These dispersants (C) may be used alone or in combination of two or more.

Further, as the solvent (D) used in the production of the pigment dispersion composition, the polymer (B), the pigment dispersant (C), and other components optionally blended are dissolved, It is preferable to use a solvent that can stably disperse the pigment (A). Examples of such a solvent include aromatic solvents such as toluene, xylene and methoxybenzene; acetic acid ester solvents such as ethyl acetate, butyl acetate, propylene glycol monomethyl ether acetate and propylene glycol monoethyl ether acetate; Propionate solvents such as pionate; alcohol solvents such as methanol, ethanol, propanol, ethylene glycol; ether solvents such as butyl cellosolve, propylene glycol monomethyl ether, diethylene glycol ethyl ether, diethylene glycol dimethyl ether;

Ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; aliphatic hydrocarbon solvents such as hexane; N, N-dimethylformamide, γ-butyrolactam, N-methyl-2-pyrrolidone, aniline, pyridine and the like. Examples thereof include nitrogen compound solvents; lactone solvents such as γ-butyrolactone; carbamate esters such as a mixture of methyl carbamate and ethyl carbamate at 48:52; water or a mixture of water and a water-soluble organic solvent. Among these solvents, those having a boiling point in the range of 80 ° C. to 250 ° C. are preferable, and these solvents can be used alone or in combination of two or more kinds.

The non-volatile content 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 (C) contained in the nonvolatile 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 each represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, which may be the same or different.)

In the ink-jet ink of the present invention containing the polymer (B), the cyclocarbonate group and the acid group in the polymer (B) react with each other by being heated in the firing step after pixel formation, thereby forming a crosslinked structure. Therefore, the heat resistance and solvent resistance of the colored pixels of the color filter obtained by using this jet ink can be improved.

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 may be the same or different and each represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. In addition, a is an integer of 1 to 6. )

Specific examples thereof 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) such as (meth) acrylate, 5-ethyl-5,6-carbonate hexyl (meth) acrylate, and 7,8-carbonate octyl (meth) acrylate.
Acrylates; 2,3-carbonate propyl vinyl ether, methyl-2,3-carbonate propyl malate, methyl-2,3-carbonate propyl crotonate and the like can be mentioned. These cyclocarbonate group-containing monomers can be used alone or in combination of two or more.

Examples of the acid 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 ester such as dimethyl fumarate, diethyl fumarate, dibutyl fumarate, dimethyl itaconate, dibutyl itaconic acid, methyl ethyl fumarate, methyl butyl fumarate, methyl ethyl itaconate, etc. 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 can be 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 and the like include the solvent (D) 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 for producing the polymer (B) is not particularly limited, but among them, it is excellent in heat resistance, solvent solubility and pigment dispersibility. Since an inkjet ink is obtained, the cyclocarbonate group-containing monomer, the acid group-containing monomer, and the copolymerizable monomer which is used in combination as necessary are added in an amount of 1 to 50% by weight. The range of weight% is preferable, and the range of 2 to 40% is particularly preferable.

The ratio of the acid group-containing monomer used in the production of the polymer (B) is not particularly limited, but among them, the cyclocarbonate group and the acidic group undergo a crosslinking reaction and are excellent in heat resistance. Since an inkjet ink forming a coating film is obtained, a cyclocarbonate group-containing monomer,
3-40 based on the total 100% by weight of the acidic group-containing monomer and the copolymerizable monomer used in combination as required.
A range of 5% by weight is preferable, and a range of 5 to 35% by weight is particularly preferable.

Further, when a copolymerizable monomer is used in combination when producing 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.

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 among them, since an ink-jet ink having an appropriate viscosity and excellent in coating workability and capable of imparting a uniform and good coating film performance can be obtained, 3,000 to 30,000 is preferable. Is particularly preferable.

The ratio between the weight average molecular weight (hereinafter referred to as Mw) and Mn (Mw / Mn: molecular weight distribution) is not particularly limited, but is preferably 6.0 or less, and among them, the viscosity is suitable and the coating is performed. It is particularly preferably 5.0 or less because an ink jet ink having excellent workability and capable of imparting uniform and good coating performance can be obtained.

The color filter of the present invention can be manufactured by a method in which the pixel portion is formed on the transparent substrate by the ink jet recording method using the ink jet ink of the present invention, and then the pixel portion is thermally cured. it can.

The ink-jet ink of the present invention may contain a compound (E) having at least two ethylenically unsaturated double bonds in the molecule, whereby a photo-curable ink-jet ink can be obtained. it can. In this case, a color filter can be manufactured by a method in which a pixel portion is formed on a transparent substrate by an inkjet recording method, and then a colored film layer of the inkjet ink in the pixel portion is photo-cured and then thermally cured.

The compound (E) having at least two ethylenically unsaturated double bonds in the molecule has a photocurable functional group which undergoes a polymerization or crosslinking reaction upon irradiation with energy rays such as ultraviolet rays and visible rays. Of these compounds, radically polymerizable compounds, cationically polymerizable compounds and the like are mentioned as typical ones, and specific examples thereof include (meth) acrylic compounds and maleimide compounds.

As a compound (E) having at least two ethylenically unsaturated double bonds in the molecule, a (meth) acrylic compound is exemplified. For example, trimethylolethane tri (meth) acrylate, trimethylolpropane tri (meth) ) Acrylate, trimethylolpropane di (meth) acrylate, 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 (acryloyl) (Oxypropyl) ether, tri (acryloyloxyethyl) isocyanurate, tri (acryloyloxyethyl) cyanurate, glycerin tri (meth) acrylate, epoxy (meth) acrylate, urethane (meth) acrylate, polyester (meth) acrylate and the like. .

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 (eg, 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.)
Reaction products and the like.

Further, as the polyester (meth) acrylate, for example, a reaction product of a polyester polyol, which is a reaction product of a polybasic acid compound or its anhydride with a polyol, and (meth) acrylic acid can be mentioned.
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. , 3-methyl-1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, trimethylolpropane, pentaerythritol and the like.

As the compound (E) having at least two ethylenically unsaturated double bonds in the molecule, a maleimide compound is exemplified, and a compound having a maleimide group bonded by an aliphatic group is preferable. Include N-hexylmaleimide and N, N′-4,9-dioxa-1,
Aliphatic maleimide compounds having an ether bond in the alkyl or carbon chain such as 12-bismaleimidododecane; ethylene glycol bis (maleimide acetate), poly (tetramethylene glycol) bis (maleimide acetate), tetra (ethylene glycol modified)
Pentaerythritol tetra (maleimide acetate)
And maleimide carboxylic acid (poly) alkylene glycol esters; carbonate maleimides such as bis (2-maleimidoethyl) carbonate; urethane maleimides such as isophorone bisurethane bis (N-ethylmaleimide).

Among these, trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, N, N'-4,9. -Dioxa-1,12-bismaleimidododecane, ethylene glycol bis (maleimide acetate), poly (tetramethylene glycol) bis (maleimide acetate), (ethylene glycol modified) pentaerythritol tetra (maleimidoacetate), bis (2-maleimidoethyl) ) Carbonate, isophorone bis urethane bis (N-
Polyfunctional (meth) acrylates and polyfunctional maleimides such as ethylmaleimide) are particularly preferable in that they have high sensitivity to ultraviolet rays and visible rays and can obtain a high crosslinking density.

The compound (E) may be one kind or two kinds.
The polymer (B) 100 may be used in combination of two or more kinds, and the use ratio thereof is not particularly limited, but among them, an inkjet ink excellent in photocurability and heat resistance can be obtained. 25 to 1 with respect to parts by weight
A range of 50 parts by weight is preferable.

When the compound (E) is added to the ink-jet ink of the present invention, it is desirable to use a photopolymerization initiator (F) together. The energy ray when photopolymerizing is
A light ray having a wavelength of 200 to 500 nm is preferable.

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.

Further, various photosensitizers can 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 the photopolymerization initiator (F) has a high photosensitivity at the time of photocuring and a photopolymerization initiator (F Since it is possible to prevent the deterioration of coating film physical properties due to the precipitation of crystals of (1), the amount of the compound (E) is 0.1
The range of ˜30 parts by weight is preferred.

Further, in the ink-jet ink 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.

The viscosity of the ink jet ink of the present invention is preferably 50 mPa · s or less, and particularly preferably 0.5 to 10 mPa · s, in order to obtain a good ejection property from the ink jet head. preferable.
For this purpose, the amount of the solvent is preferably in the range of 1 to 19 parts by weight per 1 part by weight of the nonvolatile content in the ink jet ink.

The ink-jet ink of the present invention thus obtained is a one-pack type and therefore has excellent storage stability. Furthermore, the polymer (B) having a cyclocarbonate group and an acidic group is used. Therefore, not only a non-aqueous organic solvent but also water, an aqueous solvent, or a mixed solvent thereof can be used as the solvent. Further, when a color filter is produced using the inkjet ink of the present invention, the polymer (B) is crosslinked and thermally cured in the firing step after pixel formation, and thus the obtained color filter is excellent. Has heat resistance.

To the ink-jet ink of the present invention, if necessary, known and commonly used additives may be added as long as the effects of the present invention are not impaired. Examples of such additives include coupling agents, antioxidants,
Examples include stabilizers, fillers, various leveling agents such as silicon-based, fluorine-based, acrylic-based, polyvalent carboxylic acids and their anhydrides, and epoxy compounds. In this way, it can be suitably used as an inkjet ink for a color filter.

The coupling agent has a function of chemically binding the inorganic material and the organic material and enhancing the affinity between them. Typical coupling agents include silane compounds, titanium compounds, and aluminum compounds.

Of these, γ-glycidoxypropyltrimethoxysilane and β- (3,4) are provided because they impart excellent smoothness, adhesiveness, water resistance and solvent resistance to various transparent substrates. A silane coupling agent having an epoxy group such as -epoxycyclohexyl) ethyltrimethoxysilane is preferable. These coupling agents are
You may use 1 type or in mixture of 2 or more types.

The amount of the coupling agent used is an ink jet ink having good smoothness, water resistance, solvent resistance, and adhesion to the transparent substrate of the colored film layer of the ink jet ink formed on the transparent substrate for a color filter. From 100 parts by weight of the polymer (B),
It is in the range of 30 parts by weight, preferably 0.5 to 20 parts by weight.

The polyvalent carboxylic acid and its anhydride, which are optionally added to the ink-jet ink of the present invention, are used for the purpose of adjusting the solubility of the polymer (B) in an aqueous solvent. The epoxy compound is used for the purpose of improving the water resistance of the colored cured film layer of the inkjet ink by thermally reacting with the carboxyl group of the polymer (B) after photocuring.

As the epoxy compound, for example, phenol / novolak type epoxy resin, cresol / novolak type epoxy resin, bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol A / novolak type epoxy resin, alicyclic epoxy resin,
Examples include various glycols, alkylene oxide-modified epoxy resins, glycidyl group-containing acrylic resins, alicyclic epoxy group-containing acrylic resins, and the like. These may be used alone or in combination of two or more.

Since the phthalocyanine (a) is a green colorant, the inkjet ink of the present invention is an inkjet ink composition for a green pixel portion of a color filter. Alternatively, by substituting a known blue pigment, a red or blue color filter inkjet ink having excellent heat resistance and chemical resistance can be obtained in the same manner as the inkjet ink.

Using the ink-jet ink of the present invention thus prepared, a green film layer pattern is formed on the green pixel portion of the color filter on the transparent substrate by an ink-jet method, followed by heat curing, or The green cured film layer can be formed by further thermally curing after photocuring.

The transparent substrate used in the present invention is a transparent substrate used for a color filter, and any substrate having heat resistance capable of withstanding thermosetting can be used, and a typical example thereof is a glass substrate.

Examples of the ink jet method used in the present invention include a thermal method using an electrothermal converter as an energy generating element and a piezo jet method using a piezoelectric element.

In order to form a pixel pattern, first, an inkjet ink may be discharged from a discharge head onto a predetermined pixel portion on a transparent substrate provided with a black matrix. The Black Matrix is
For example, it can be provided on the transparent substrate by a method of forming a metal thin film pattern by a sputtering method or a vapor deposition method, a method of patterning by a photolithography method using a black resin composition, an inkjet method, or the like.
At this time, depending on the properties of the inkjet ink composition,
The black matrix may be subjected to hydrophilic treatment, hydrophobic treatment or oil repellent treatment. Further, if necessary, surface treatment of the substrate with an adhesive aid such as the above-mentioned coupling agent is effective as a means for improving the adhesive force between the substrate and the pixel pattern. Further, the substrate may be provided with an ink jet ink receiving layer.

The color filter of the present invention can be manufactured, for example, by the following method. That is, the inkjet ink of the present invention is ejected from the ejection head onto the green pixel portion on the transparent substrate provided with the black matrix to form a colored coating layer of the inkjet ink, and then the coating layer is thermally cured. Or light-cured and then heat-cured. Then, in the same manner, a colored cured film layer is formed on the red and blue pixel portions by using a known inkjet ink composition for color filters corresponding to each color, and then, if necessary, protection on the pixel portion. A method of forming a layer and, if necessary, post-baking and then forming a transparent conductive electrode such as ITO can be mentioned.

Examples of the heat source used for heat curing include known and commonly used heat sources such as a hot plate, an electric oven, and an infrared heating furnace. The heating temperature is 150 to 300, because thermosetting is sufficient, strength, solvent resistance and alkali resistance are excellent, there is no excessive volume shrinkage, and a colored cured film layer having good adhesion to a substrate and good accuracy is obtained. The range of ° C is preferred.

When the colored film layer is photo-cured before being heat-cured, the light used is preferably ultraviolet light or visible light, and particularly preferably light having a wavelength of 200 to 500 nm. As these light sources, for example, low-pressure mercury lamp, high-pressure mercury lamp, ultra-high pressure mercury lamp, metal halide lamp, chemical lamp, black light lamp, mercury-xenon lamp, excimer lamp, short arc lamp,
Helium / Cadmium laser, Argon laser,
A known and commonly used light source such as a THG using an Nd-YAG laser or an FHG light laser can be used. The photo-curing condition is affected by the type of light source used and the type and amount of photo-polymerization initiator, and cannot be determined unconditionally, but generally 10
The range of 0 to 3000 J / m ² is preferable. When using both photo-curing and heat-curing, the heat-curing treatment is performed after the photo-curing treatment.

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, and also excellent in heat resistance, chemical resistance and light resistance.

[0086]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples. In addition, "part" and "%" in the examples represent "part 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 2,3-carbonate propyl methacrylate (hereinafter abbreviated as CPMA) 82.0 parts, methacrylic acid 38.0 parts, and benzyl methacrylate. (Less than,
It is abbreviated as BZMA. ) 210.0 parts, PGMAc9
A mixed solution of 7.0 parts and 16.5 parts of t-butylperoxy-2-ethylhexanate (hereinafter abbreviated as PO) was added dropwise over 1 hour. 90 ℃ after dropping
After 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 (sample 1 g
Based on the prescribed method for the acid content present in the solution, the amount of potassium hydroxide required for neutralization was 75 mgKOH.
/ G of 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% and a Gardner viscosity of T.
~ U, the polystyrene equivalent number average molecular weight is 5,30
0 and Mw / Mn were 2.29.

Example 1 In a high-speed disperser "TSC-6H" manufactured by Igarashi Kikai Seisakusho Co., Ltd. charged with zirconia beads having a diameter of 0.5 mm, 15 parts of zinc halide phthalocyanine having an average primary particle diameter of 40 nm and the following average composition, 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),

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 and PGMA
After mixing 17.1 parts of c, the mixture was filtered using a filter having a pore size of 1.0 μm to obtain an inkjet ink composition for a color filter of the present invention.

Example 2 Pigment Dispersion Composition 10 for Color Filter Obtained in Example 1
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". 0.3
And 17.1 parts of PGMAc were mixed and then filtered using a filter having a pore size of 1.0 μm to obtain an inkjet ink composition for a color filter.

Example 3 A green pigment dispersion composition (G-2) was prepared in the same manner as in Example 1 except that 15 parts of nickel halide phthalocyanine having the following average composition was used instead of 15 parts of zinc halide phthalocyanine. Obtained.

<Average composition of nickel halide phthalocyanine> In the general formula (1),

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

Next, 100 parts of this pigment dispersion composition for color filter, 31.3 parts of polymer solution (B-1), D
PHA 12.5, "Irgacure # 369" 0.3
And 17.1 parts of PGMAc were mixed and then filtered using a filter having a pore size of 1.0 μm to obtain an inkjet ink composition for a color filter.

Comparative Example 1 A green pigment dispersion composition (GH-1) 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 in place of 15 parts of zinc halide phthalocyanine. Obtained.

[0099]

60 parts of the green pigment dispersion composition (GH-1) and 40 parts of the yellow pigment composition (Y-1) obtained in Example 1 are mixed to prepare a pigment dispersion composition for a color filter used in the present invention. Got

Next, 100 parts of this pigment dispersion composition for a color filter, 31.3 parts of the polymer solution (B-1), and D
PHA 12.5, "Irgacure # 369" 0.3
And 17.1 parts of PGMAc were mixed and then filtered using a filter having a pore size of 1.0 μm to obtain an inkjet ink composition for a color filter.

Comparative Example 2 Pigment dispersion composition 10 for color filter obtained in Example 1
0 part, Dainippon Ink and Chemicals, Inc. acrylic base alkali soluble binder resin "EXECEDIC LC-295"
(PGMAc solution, nonvolatile content: 40%, acid value of solution: 3
3mgKOH / g) 31.3 parts, DPHA 12.5 parts,
"Irgacure # 369" 0.3 parts and PGM
After mixing 17.1 parts of Ac, the mixture was filtered using a filter having a pore size of 1.0 μm to obtain an inkjet ink composition for a color filter.

Test Example The ink jet ink compositions for color filters obtained in Examples 1 to 3 and Comparative Examples 1 and 2 were subjected to the following tests. The results and evaluation are shown in Table 1 and FIG.

<Color Density Test of Cured Film Layer of Inkjet Ink Composition for Color Filter> Inkjet ink composition for color filter after post-baking using a piezo jet type inkjet head manufactured by Saar Co. on a transparent glass substrate. For the color filters obtained in Examples 1 to 3 and Comparative Examples 1 and 2 so that the x value and the y value in the CIE color system chromaticity of the cured film layer are x = 0.260 and y = 0.630. After solid printing each of the inkjet ink compositions, in Example 1 in which DPHA was not blended, preliminary drying was performed at 110 ° C for 10 minutes to form an inkjet ink composition coating layer for a color filter, and then in an oven at 200 ° C. Post-baking is performed for 30 minutes at 250 ° C. for 30 minutes, and the polymer ( ) And is thermally cured, to form Sample color density test, also Example 2 blended with DPHA
In 3 and Comparative Examples 1 and 2, pre-baking was performed at 60 ° C. for 5 minutes to form an inkjet ink composition film layer for a color filter, and then 0.1 J was applied using a high pressure mercury lamp.
After light-curing DPHA by photopolymerization by irradiating light of / cm ^2, the polymer (B) contained in the film is heat-cured by post-baking at 250 ° C. for 30 minutes to obtain a color density. A test sample was prepared.

The CIE color development chromaticity of the ink-jet ink composition cured film layer was measured using an Olympus microspectrophotometer "OSP-SP-200".

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

<Transparency Test of Cured Film Layer of Inkjet Ink Composition for Color Filter> Regarding the cured film layer of inkjet ink composition for color filter of the sample for the color density test, a microspectrophotometer "OSP-SP" was used.
-200 "was used to measure the Y value in the chromaticity of the CIE color system. The larger the Y value, the higher the transparency. The results are shown in Table 1.

<Color Purity Test of Cured Film Layer of Inkjet Ink Composition for Color Filters> Using the inkjet ink compositions for color filters obtained in Examples 1 to 3 and Comparative Examples 1 and 2, piezo jet type saar A green pixel pattern was formed on the glass substrate with an inkjet head manufactured by the company. The subsequent steps are the same as in the method of preparing the sample for the color density test, and the color purity test in which the cured film layers of the inkjet ink composition after post-baking are 2.0, 2.5 and 3.0 μm, respectively. A sample was prepared.

Regarding the ink-jet ink composition cured film layer of the sample for the color purity test, a microspectrophotometer “OSP” was used.
-SP-200 "was used to measure the y value in the CIE color development system. It was evaluated that the higher the y value, the higher the color purity.
The results are shown in Fig. 1.

<Heat resistance test of cured film layer of inkjet ink composition for color filter> Regarding the cured film layer of inkjet ink composition for color filter of the sample for the color density test, a microscopic spectrophotometer "OSP-SP" was used.
-200 "was used to measure the Y value in the CIE color development system chromaticity, and the value was defined as Y1. Then, the cured film layer was further heated at 280 ° C. for 30 minutes, and then the Y value of the cured film layer was measured using the above-mentioned apparatus, and the value was defined as Y2. The smaller the difference ΔY between Y1 and Y2 is, the higher the heat resistance of the cured film layer is evaluated, and the one less than 0.5 is ◯,
Those having a value of 0.5 or more were represented by x. The results are shown in Table 1.

[0111]

[Table 1]

From the results shown in Table 1, the green pixel portion of the color filter having the cured film layer made of the ink jet ink composition for color filters obtained in Examples 1 to 3 was prepared by using the halogenated copper phthalocyanine. Comparative Example 1
Compared with the case of a green pixel portion of a color filter having a cured film layer made of the inkjet ink composition for a color filter obtained in step 2, x = 0.260 and y = 0.60.
Since the film thickness of 630 is thin, it is clear that it is excellent in transparency and color density.

In addition, from the results shown in FIG.
The green pixel portion of the color filter having the cured film layer made of the inkjet ink composition for a color filter obtained in No. 3 was cured using the inkjet ink composition for a color filter obtained in Comparative Example 1 using halogenated copper phthalocyanine. Since the y value is higher in the same film than in the case of the green pixel portion of the color filter having the film layer, it is clear that the color purity is also excellent.

Further, from the results shown in Table 1, the green pixel portion of the color filter having the cured film layer comprising the ink jet ink composition for color filters obtained in Examples 1 to 3 does not contain a cyclocarbonate group. The heat resistance of the cured film layer is high and the heat resistance is excellent as compared with the green pixel portion of the color filter having the cured film layer formed of the inkjet ink composition for color filters obtained in Comparative Example 2 using the acrylic resin. It is clear that

[0115]

EFFECT OF THE INVENTION By using the ink jet ink composition for a color filter of the present invention, in the green pixel portion,
A color filter having a cured film layer having high color purity and color density and excellent transparency and heat resistance can be obtained. Further, by containing a compound having a photopolymerizable functional group in the inkjet ink composition for a color filter of the present invention, it is possible to provide a highly practical color filter that uses both photocuring and heat curing.

[Brief description of drawings]

FIG. 1 is the thickness of a colored cured film layer of an inkjet ink composition for a color filter and y in a CIE color development system.
It is a figure which shows the relationship with a value.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaaki Kishimoto             3-7-19 Ayukawa, Ibaraki City, Osaka Prefecture (72) Inventor Yoshiro Yamaguchi             3-3-2 Kishibe Minami Suita City, Osaka Prefecture F-term (reference) 2H048 BA11 BA64 BB02 BB24 BB42                 2H086 BA54 BA55 BA59 BA62                 4J039 AD09 AD10 BC59 BC60 BC72                       BE01 BE12 BE22 EA08 GA24

Claims (12)

[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. An ink-jet ink composition for a color filter, which comprises a polymer (B) having [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 represent 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 an integer of 8 to 16. Y represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, an oxygen atom or a hydroxyl group, and m represents an integer of 0-2. ) 2. The inkjet ink composition 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 inkjet ink composition for a color filter according to claim 2, wherein the polymer (B) is a vinyl polymer. 4. The inkjet ink composition for a color filter according to claim 3, wherein the polymer (B) is an acrylic polymer. 5. The inkjet ink composition 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. Inkjet ink composition. 7. The inkjet ink for a color filter according to claim 6, wherein the nickel phthalocyanine halide or zinc phthalocyanine halide is a phthalocyanine halogenated with 8 or more bromine atoms and 1 or more chlorine atoms. Composition. 8. A pigment dispersion composition obtained by mixing the pigment (A), the pigment dispersant (C) and the solvent (D) as essential components, and 2-oxo-1,3-dioxolane-4-.
A polymer (B) having an yl group and an acidic group, and a compound (E) having at least two ethylenically unsaturated double bonds in the molecule are blended as essential components. An inkjet ink composition for a color filter according to any one of 1 to 5. 9. The inkjet ink composition for a color filter according to claim 8, wherein the halogenated phthalocyanine (a) represented by the general formula (1) is a halogenated nickel phthalocyanine or a halogenated zinc phthalocyanine. 10. The pigment (A), 2-oxo-1,
A polymer (B) having a 3-dioxolan-4-yl group and an acidic group, a pigment dispersant (C), a solvent (D), and at least two ethylenically unsaturated double bonds in the molecule. The compound (E) and the photopolymerization initiator (F) are contained as essential components, and the content of the pigment (A) is 4 to.
The content of the polymer (B) is 3 to 15% by weight at 12% by weight.
The color according to any one of claims 1 to 5, wherein the content of the compound (E) is 0.8 to 23% by weight, and the total content of the nonvolatile components is 20 to 30% by weight. Inkjet ink composition for filters. 11. The halogenated phthalocyanine (a) represented by the general formula (1) is a halogenated nickel phthalocyanine or a halogenated zinc phthalocyanine.
The inkjet ink composition for a color filter according to claim 10. 12. A color filter, which comprises a colored cured coating film layer of the inkjet ink composition for a color filter according to claim 1 on a substrate.