JP2010002914A - Coloring composition for color filter and color filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coloring composition capable of forming a color filter having a high brightness and contrast ratio, and to provide a color filter having an excellent color characteristic. <P>SOLUTION: The coloring composition for the color filter contains: a colorant carrier having a transparent resin, its precursor or the mixture of them; a red pigment as a colorant; and C.I. Pigment Yellow 139 pigment which has a specific spectral characteristics that is made by being kneaded for eight hours or more together with a water-soluble inorganic salt and a water-soluble organic solvent as a pigment. The color filter includes a red color filter segment formed by the coloring composition. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a colored composition for a color filter used for producing a color filter used for a color liquid crystal display device, a color image pickup tube element, and the like, and a color filter formed using the same.

A color filter has two or more kinds of fine band (striped) filter segments arranged in parallel or intersecting with each other on the surface of a transparent substrate such as glass, or the fine filter segments are arranged vertically and horizontally. It is made up of those arranged in The filter segments are as fine as several microns to several hundreds of microns, and are regularly arranged in a predetermined arrangement for each hue.
On the color filter used in the color liquid crystal display device, a transparent electrode for driving the liquid crystal is generally formed by vapor deposition or sputtering, and an alignment film for aligning the liquid crystal in a certain direction is formed thereon. Has been. In order to sufficiently obtain the performance of these transparent electrodes and alignment films, it is necessary to perform the formation process at a high temperature of generally 200 ° C. or higher, preferably 230 ° C. or higher.

Therefore, at present, as a method for producing a color filter, a method called a pigment dispersion method using a pigment having excellent light resistance and heat resistance as a colorant is mainly used. The color filter is mainly produced by the following two methods. Is manufactured.
In the first method, a dispersion of a pigment in a photosensitive transparent resin solution is applied to a transparent substrate such as glass, the solvent is removed by drying, a pattern exposure of one filter color is performed, and then an unexposed portion is obtained. The color filter can be manufactured by repeating the same operation for all the filter colors in order after forming a first color pattern by applying a process such as heating if necessary.

In the second method, a dispersion of a pigment in a transparent resin solution is applied to a transparent substrate such as glass, the solvent is removed by drying, and then a resist such as a positive resist is applied on the coating film. Two filter color patterns are exposed and developed to form a resist pattern. Using this as an etching resist, the pigment-dispersed coating film without the resist pattern is removed with an etching solution, and the resist coating film is peeled off. A color filter can be manufactured by forming a color pattern and, if necessary, applying a treatment such as heating, and then repeating the same operation for all filter colors. Note that the development of the resist and the etching of the pigment-dispersed coating film can be performed simultaneously.
In the above method, a colored composition containing a yellow pigment is used for the production of the red filter segment, and conventionally CI Pigment Yellow 185, 139 and the like have been used as the yellow pigment.

JP-A-8-171014

  However, in the situation where there is an increasing demand for color characteristics such as transparency, that is, brightness, improvement in color purity, coating uniformity when forming pixels, sensitivity, developability, pattern shape, etc. CI Pigment Yellow 185, 139, etc., adopted by the company, are becoming difficult to deal with. In particular, in recent years, liquid crystal display devices have been applied for television monitor applications, and bright color filters are required to produce low power consumption panels. In addition, the demand for image quality is high for television monitor applications, and the demand for contrast ratio, which is one factor affecting the image quality, is also increasing.

  Accordingly, an object of the present invention is to provide a coloring composition that can form a color filter that is excellent in color characteristics, has particularly high transmittance, and therefore has high lightness and a high contrast ratio. Another object of the present invention is to provide a color filter having good color characteristics and a high contrast ratio.

  The coloring composition for a color filter of the present invention is a CI having specific spectral characteristics as a yellow pigment formed by kneading for 8 hours or more together with a red pigment as a coloring agent, a water-soluble inorganic salt as a coloring agent, and a water-soluble organic solvent. Pigment Yellow 139 pigment is included, so that the spectral spectrum of the filter segment can be controlled, and a color filter having high brightness and high color purity and a high contrast ratio can be formed.

That is, the coloring composition for a color filter of the present invention comprises a colorant carrier comprising a transparent resin, a precursor thereof or a mixture thereof,
A red pigment as a colorant;
CI Pigment Yellow 139 pigment kneaded with a water-soluble inorganic salt as a colorant and a water-soluble organic solvent for 8 hours or more,
A composition comprising:
When the CI Pigment Yellow 139 pigment formed a coating film using a yellow composition obtained by dispersing the pigment in the colorant carrier, the absorbance (A425) and the wavelength of the coating film with respect to light having a wavelength of 425 nm were 480 nm. The ratio (A425) of the absorbance (A425) with respect to the light with a wavelength of 425 nm and the absorbance with respect to the light with a wavelength of 530 nm (A530) (A425). / A530) has a spectral characteristic of 17 or more.

The colored composition of the present invention preferably contains a pigment derivative having a basic group or a triazine derivative having a basic group.
Moreover, it is preferable that content of the pigment derivative which has a basic group, or the triazine derivative which has a basic group is 0.001 to 40 weight% on the basis of CI Pigment Yellow139 pigment.
The color filter of the present invention further comprises at least one red filter segment, at least one blue filter segment, and at least one green filter segment, and the at least one red filter segment is formed from the colored composition of the present invention. It is formed.

In the colored composition of the present invention, since the transmission wavelength region of the yellow pigment contained in the colored composition is shifted to the short wavelength side, it is possible to form a red filter segment with extremely high brightness on the substrate. .
A color filter comprising a filter segment formed using the coloring composition of the present invention can simultaneously impart high brightness and high saturation to a color liquid crystal display device, and a transmissive / reflective color liquid crystal display device and It is suitable as a color filter for color separation of a solid-state image sensor.

It is a conceptual diagram of the measuring apparatus for measuring a contrast ratio.

First, the coloring composition for a color filter of the present invention will be described.
The colored composition for a color filter of the present invention includes a transparent resin, a precursor thereof, or a colorant carrier made of a mixture thereof, a red pigment as a colorant, a water-soluble inorganic salt as a colorant, and a water-soluble organic solvent. CI Pigment Yellow 139 pigment kneaded for 8 hours or more, wherein the CI Pigment Yellow 139 pigment forms a coating film using a yellow composition in which the pigment is dispersed in the colorant carrier Light having a ratio (A425 / A480) of the absorbance (A425) with respect to light having a wavelength of 425 nm and the absorbance (A480) with respect to light having a wavelength of 480 nm of 1.5 or less and a wavelength of 425 nm. The ratio (A425 / A530) of the absorbance (A425) with respect to light and the absorbance (A530) with respect to light having a wavelength of 530 nm has a spectral characteristic of 17 or more.

The absorbance here means a value A calculated by the following equation, where I ₀ is the intensity of incident light on the substance and I is the intensity of transmitted light after passing through the substance. Generally, it can be measured by a spectrophotometer.
A = log ₁₀ (I ₀ / I)

  When a coating film is formed using a CI Pigment Yellow 139 pigment in which the pigment is dispersed in the colorant carrier, the absorbance (A425) and wavelength of the coating film with respect to light having a wavelength of 425 nm are Ratio of absorbance (A425 / A480) to absorbance at 480 nm light (A425 / A480) of 1.5 or less, and ratio between absorbance (A425) for light having a wavelength of 425 nm and absorbance for light having a wavelength of 530 nm (A530) ( When the red filter segment is formed using the coloring composition of the present invention containing CI Pigment Yellow 139 pigment having a spectral characteristic with a value of A425 / A530) of 17 or more (hereinafter referred to as CI Pigment Yellow 139 pigment of the present invention), Compared with the conventional red filter segment, the brightness is high and the contrast ratio is also high.

The CI Pigment Yellow 139 pigment of the present invention is produced by subjecting CI Pigment Yellow 139 pigment together with a water-soluble inorganic salt and a small amount of a water-soluble organic solvent to knead for 8 hours or more to carry out a salt milling process for controlling the pigment particle size. can do. The kneading time of the CI Pigment Yellow 139 pigment, the water-soluble inorganic salt and the water-soluble organic solvent is preferably 24 hours or less from the viewpoint of the balance between the color characteristics of the resulting salt milled pigment and the cost required for the salt milling treatment.
Typical pigment salt milling time is 2 to 4 hours. With this level of processing time, a coating film is formed using a yellow composition obtained by dispersing the obtained salt milling pigment in a colorant carrier. Light having a ratio (A425 / A480) of the absorbance (A425) with respect to light having a wavelength of 425 nm and the absorbance (A480) with respect to light having a wavelength of 480 nm of 1.5 or less and a wavelength of 425 nm. The ratio (A425 / A530) of the absorbance (A425) to the light having a wavelength of 530 nm and the absorbance (A530) with respect to light having a wavelength of 530 nm does not become 17 or more, and the transmission region does not widen, so the transmittance does not increase.

  Specifically, the salt milling treatment is performed by kneading a mixture of a pigment, a water-soluble inorganic salt, and a water-soluble organic solvent while heating using a kneader such as a kneader, and then washing with water to wash the water-soluble inorganic salt and the water-soluble salt. This is a process for removing the organic solvent. The water-soluble inorganic salt works as a crushing aid, and it is thought that the pigment is crushed using the high hardness of the inorganic salt during salt milling, thereby generating an active surface and causing crystal growth. Yes. Therefore, the crushing of the pigment and the crystal growth occur simultaneously during the kneading, and the primary particle diameter of the pigment obtained varies depending on the kneading conditions. When salt milling the pigment, it is necessary to promote crystal growth by heating, and the heating temperature is preferably 70 to 150 ° C. When the heating temperature is less than 70 ° C., crystal growth does not occur sufficiently, and the shape of the pigment particles becomes undesirably close to amorphous. On the other hand, when the heating temperature exceeds 150 ° C., crystal growth proceeds excessively and the primary particle diameter of the pigment becomes large, which is not preferable as a colorant for the color filter coloring composition.

As the water-soluble inorganic salt, sodium chloride, barium chloride, potassium chloride, sodium sulfate and the like can be used, but sodium chloride (salt) is preferably used from the viewpoint of cost. The amount of the inorganic salt used for salt milling is preferably 0.5 to 20 times by weight, particularly 1 to 10 times by weight of the pigment from the viewpoint of both processing efficiency and production efficiency.
The water-soluble organic solvent functions to wet the pigment and the water-soluble inorganic salt, and is not particularly limited as long as it dissolves (mixes) in water and does not substantially dissolve the inorganic salt to be used. However, a high boiling point solvent having a boiling point of 120 ° C. or higher is preferable from the viewpoint of safety because the temperature rises during salt milling and the solvent easily evaporates.

  Examples of the water-soluble organic solvent include 2-methoxyethanol, 2-butoxyethanol, 2- (isopentyloxy) ethanol, 2- (hexyloxy) ethanol, diethylene glycol, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol. , Triethylene glycol monomethyl ether, liquid polyethylene glycol, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, dipropylene glycol, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, liquid polypropylene glycol, etc. Is used.

  At the time of salt milling, a resin can be used in combination in order to prevent strong agglomeration when the treated pigment obtained after the salt milling treatment is dried and to be easily dispersed in the colorant carrier. By using a resin together during salt milling, a soft powder-treated pigment can be obtained. The resin used for salt milling is preferably a resin that is solid at room temperature, insoluble in water, and at least partially soluble in the above organic solvent, natural resin, modified natural resin, synthetic resin, synthetic resin modified with natural resin Resin or the like is used. As the natural resin, rosin is typical, and as the modified natural resin, rosin derivatives, fiber derivatives, rubber derivatives, protein derivatives and oligomers thereof are used. Examples of the synthetic resin include epoxy resin, acrylic resin, maleic acid resin, butyral resin, polyester resin, melamine resin, phenol resin, polyurethane resin, and polyamide resin. Examples of synthetic resins modified with natural resins include rosin-modified maleic resin, rosin-modified fumaric acid resin, and rosin-modified phenol resin. The amount of the resin used is preferably in the range of 5 to 100% by weight with respect to the pigment.

  At the time of salt milling, in addition to the above resins, additives such as pigment dispersion aids and plasticizers, or inorganic pigments such as calcium carbonate, barium sulfate, and silica, which are generally known as extender pigments, may be used in combination. Moreover, in order to adjust a hue, you may mix and process with another pigment.

The colorant carrier in which the CI Pigment Yellow 139 pigment of the present invention is dispersed is composed of a transparent resin, a precursor thereof, or a mixture thereof as described above. The transparent resin is a resin having a transmittance of preferably 80% or more, more preferably 95% or more in the entire wavelength region of 400 to 700 nm in the visible light region. The transparent resin includes a thermoplastic resin, a thermosetting resin, and a photosensitive resin, and a precursor thereof includes a monomer or an oligomer that is cured by radiation irradiation to form a transparent resin, which are used alone or in combination. Two or more kinds can be mixed and used.
When the composition is cured by ultraviolet irradiation, a photopolymerization initiator or the like is added to the colored composition for a color filter of the present invention.

  Examples of thermoplastic resins include butyral resin, styrene-maleic acid copolymer, chlorinated polyethylene, chlorinated polypropylene, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, polyurethane resin, and polyester resin. , Acrylic resins, alkyd resins, polystyrene, polyamide resins, rubber resins, cyclized rubber resins, celluloses, polyethylene, polybutadiene, polyimide resins, and the like. Moreover, as a thermosetting resin, an epoxy resin, a phenol resin, a benzoguanamine resin, a melamine resin, a urea resin etc. are mentioned, for example.

  Examples of the photosensitive resin include (meth) acrylic compounds having a reactive substituent such as an isocyanate group, an aldehyde group, and an epoxy group on a linear polymer having a reactive substituent such as a hydroxyl group, a carboxyl group, or an amino group, A resin obtained by reacting an acid and introducing a photocrosslinkable group such as a (meth) acryloyl group or a styryl group into the linear polymer is used. In addition, a linear polymer containing an acid anhydride such as a styrene-maleic anhydride copolymer or an α-olefin-maleic anhydride copolymer is converted into a (meth) acrylic compound having a hydroxyl group such as hydroxyalkyl (meth) acrylate. Half-esterified products are also used.

  As monomers and oligomers, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, cyclohexyl (meth) acrylate, polyethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta Various methacrylates and methacrylates such as (meth) acrylate, dipentaerythritol hexa (meth) acrylate, tricyclodecanyl (meth) acrylate, melamine (meth) acrylate, epoxy (meth) acrylate, (meth) acrylic acid Styrene, vinyl acetate, (meth) acrylamide, N-hydroxymethyl (meth) acrylamide, acrylonitrile and the like.

  As photopolymerization initiators, 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, diethoxyacetophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 1-hydroxy Acetophenone photopolymerization initiators such as cyclohexyl phenyl ketone and 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether Benzoin photopolymerization initiators such as benzyldimethyl ketal, benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4-ben Benzophenone photopolymerization initiators such as yl-4'-methyldiphenyl sulfide, thioxanthone light such as thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone Polymerization initiator, 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis (trichloromethyl) -s-triazine, 2- (p-methoxyphenyl) -4,6-bis (trichloro) Methyl) -s-triazine, 2- (p-tolyl) -4,6-bis (trichloromethyl) -s-triazine, 2-piperonyl-4,6-bis (trichloromethyl) -s-triazine, 2,4 -Bis (trichloromethyl) -6-styryl-s-triazine, 2- (naphth-1-yl) -4,6-bis (to Chloromethyl) -s-triazine, 2- (4-methoxy-naphth-1-yl) -4,6-bis (trichloromethyl) -s-triazine, 2,4-trichloromethyl- (piperonyl) -6-triazine , 2,4-trichloromethyl (4′-methoxystyryl) -6-triazine and other triazine photopolymerization initiators, borate photopolymerization initiators, carbazole photopolymerization initiators, imidazole photopolymerization initiators and the like are used. It is done.

  The above photopolymerization initiators are used alone or in combination of two or more. As sensitizers, α-acyloxy ester, acylphosphine oxide, methylphenylglyoxylate, benzyl, 9,10-phenanthrenequinone. , Camphorquinone, ethylanthraquinone, 4,4′-diethylisophthalophenone, 3,3 ′, 4,4′-tetra (t-butylperoxycarbonyl) benzophenone, 4,4′-diethylaminobenzophenone, etc. It can also be used together.

The coloring composition for a color filter of the present invention is obtained by mixing the CI Pigment Yellow 139 pigment of the present invention with other pigments as necessary, and then, if necessary, with the above photopolymerization initiator in a colorant carrier. It can be produced by finely dispersing using various dispersing means such as a roll mill, a two-roll mill, a sand mill, and a kneader.
When the pigment is dispersed in the colorant carrier, a dispersion aid such as a resin-type pigment dispersant, a surfactant, or a dye derivative can be appropriately contained. The dispersion aid is excellent in pigment dispersion and has a great effect of preventing re-aggregation of the pigment after dispersion. Therefore, when a coloring composition is used in which the pigment is dispersed in the colorant carrier using the dispersion aid. In this case, a color filter having excellent transparency can be obtained.

  The resin-type pigment dispersant has a pigment affinity part that has the property of adsorbing to the pigment and a part that is compatible with the colorant carrier, and adsorbs to the pigment to stabilize the dispersion of the pigment into the colorant carrier. It works to do. Specific examples of resin-type pigment dispersants include polycarboxylic acid esters such as polyurethane and polyacrylate, unsaturated polyamides, polycarboxylic acids, polycarboxylic acid (partial) amine salts, polycarboxylic acid ammonium salts, and polycarboxylic acid alkylamines. Salts, polysiloxanes, long-chain polyaminoamide phosphates, hydroxyl group-containing polycarboxylic acid esters, their modified products, amides formed by the reaction of poly (lower alkyleneimines) with polyesters having free carboxyl groups, and the like Oil-based dispersants such as salts; water-soluble such as (meth) acrylic acid-styrene copolymer, (meth) acrylic acid- (meth) acrylic acid ester copolymer, styrene-maleic acid copolymer, polyvinyl alcohol, polyvinylpyrrolidone Resin, water-soluble polymer, polyester Modified polyacrylate, ethylene oxide / propylene oxide addition compound, phosphate ester-based and the like are used, they can be used alone or in admixture of two or more.

  Surfactants include sodium lauryl sulfate, polyoxyethylene alkyl ether sulfate, sodium dodecylbenzene sulfonate, alkali salt of styrene-acrylic acid copolymer, sodium stearate, sodium alkyl naphthalene sulfonate, sodium alkyl diphenyl ether disulfonate. , Lauryl sulfate monoethanolamine, lauryl sulfate triethanolamine, ammonium lauryl sulfate, monoethanolamine stearate, sodium stearate, sodium lauryl sulfate, monoethanolamine of styrene-acrylic acid copolymer, polyoxyethylene alkyl ether phosphate Anionic surfactants such as: polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene Nonionic surfactants such as nylphenyl ether, polyoxyethylene alkyl ether phosphate ester, polyoxyethylene sorbitan monostearate, polyethylene glycol monolaurate; chaotic properties such as alkyl quaternary ammonium salts and their ethylene oxide adducts Surfactants: Examples include amphoteric surfactants such as alkylbetaines such as alkyldimethylaminoacetic acid betaine and alkylimidazolines, and these can be used alone or in admixture of two or more.

  A pigment derivative is a compound in which a substituent is introduced into an organic pigment. Organic dyes also include light yellow aromatic polycyclic compounds such as naphthalene and anthraquinone that are not generally called dyes. Examples of the dye derivatives are described in JP-A-63-305173, JP-B-57-15620, JP-B-59-40172, JP-B-63-17102, JP-B-5-9469, and the like. These can be used alone or in combination of two or more. In particular, a pigment derivative having a basic group or a triazine derivative having a basic group is preferably used because of a large pigment dispersion effect.

式（２）

式（３）

式（４）

Specific examples of the basic group possessed by the dye derivative include substituents represented by the following general formulas (1), (2), (3) and (4).
Formula (1)

Formula (2)

Formula (3)

Formula (4)

X: represents —SO ₂ —, —CO—, —CH ₂ NHCOCH ₂ —, —CH ₂ — or a direct bond.
n represents an integer of 1 to 10.
R ₁ and R ₂ : each independently an alkyl group which may be substituted, an alkenyl group which may be substituted, a phenyl group which may be substituted, or a combination of R ₁ and R ₂ Represents an optionally substituted heterocycle containing a nitrogen, oxygen or sulfur atom. As for carbon number of an alkyl group and an alkenyl group, 1-10 are preferable.
R _{3 represents} an alkyl group which may be substituted, an alkenyl group which may be substituted or a phenyl group which may be substituted. As for carbon number of an alkyl group and an alkenyl group, 1-10 are preferable.
R ₄ , R ₅ , R ₆ , R ₇ : each independently represents a hydrogen atom, an optionally substituted alkyl group, an optionally substituted alkenyl group or an optionally substituted phenyl group. As for carbon number of an alkyl group and an alkenyl group, 1-5 are preferable.

Y: represents —NR ₈ —Z—NR ₉ — or a direct bond.
R ₈ and R ₉ each independently represents a hydrogen atom, an optionally substituted alkyl group, an optionally substituted alkenyl group or an optionally substituted phenyl group. As for carbon number of an alkyl group and an alkenyl group, 1-5 are preferable.
Z: represents an alkylene group that may be substituted, an alkenylene group that may be substituted, or a phenylene group that may be substituted. As for carbon number of an alkylene group and an alkenylene group, 1-8 are preferable.
P: The substituent shown by Formula (6) or the substituent shown by Formula (7) is represented.
Q: A hydroxyl group, an alkoxyl group, a substituent represented by the formula (6) or a substituent represented by the formula (7).

式（６）

Formula (5)

Formula (6)

  Examples of the organic pigment constituting the pigment derivative having a basic group include diketopyrrolopyrrole pigments, azo pigments such as azo, disazo, and polyazo, phthalocyanine pigments, diaminodianthraquinone, anthrapyrimidine, flavantrons, and ant Anthraquinone pigments such as anthrone, indanthrone, pyranthrone, violanthrone, quinacridone pigments, dioxazine pigments, perinone pigments, perylene pigments, thioindigo pigments, isoindoline pigments, isoindolinone pigments, quinophthalone pigments, slen Pigments, metal complex pigments, and the like. Moreover, the pigment used for the coloring composition for color filters mentioned later may be used.

  Triazines constituting triazine derivatives having basic groups are alkyl groups such as methyl and ethyl groups, amino groups or dimethylamino groups, alkylamino groups such as diethylamino groups and dibutylamino groups, nitro groups, hydroxyl groups and methoxy groups. Group, alkoxy group such as ethoxy group and butoxy group, halogen such as chlorine or methyl group, methoxy group, amino group, dimethylamino group, phenyl group which may be substituted with hydroxyl group, methyl group, ethyl group, methoxy group 1,3,5-triazine which may have a substituent such as phenylamino group which may be substituted with ethoxy group, amino group, dimethylamino group, diethylamino group, nitro group, hydroxyl group and the like.

The pigment derivative and isoindoline derivative having a basic group of the present invention can be synthesized by various synthetic routes. For example, after introducing a substituent represented by the following formula (8) to formula (11) into an organic pigment or isoindoline, it reacts with the substituent and is represented by formula (2) to formula (5). Amine components that form substituents such as N, N-dimethylaminopropylamine, N-methylpiperazine, diethylamine or 4- [4-hydroxy-6- [3- (dibutylamino) propylamino] -1,3 It can be obtained by reacting 5-triazin-2-ylamino] aniline or the like.
Formula (7) —SO ₂ Cl
Formula (8) -COCl
Formula (9) —CH ₂ NHCOCH ₂ Cl
Equation (10) -CH ₂ Cl

When the organic pigment is an azo pigment, a basic group is introduced by introducing a substituent represented by the general formulas (2) to (5) into a diazo component or a coupling component in advance and then performing a coupling reaction. An azo pigment derivative having the same can also be produced.
The triazine derivative having a basic group of the present invention can be synthesized by various synthetic routes. For example, starting from cyanuric chloride, an amine component that forms a substituent represented by the general formulas (2) to (5) on at least one chlorine of cyanuric chloride, such as N, N-dimethylaminopropylamine or N It is obtained by reacting methylpiperazine or the like and then reacting the remaining chlorine of cyanuric chloride with various amines or alcohols.

  Examples of the amine component used for forming the substituents represented by the general formulas (2) to (7) include dimethylamine, diethylamine, N, N-ethylisopropylamine, N, N-ethylpropylamine. N, N-methylbutylamine, N, N-methylisobutylamine, N, N-butylethylamine, N, N-tert-butylethylamine, diisopropylamine, dipropylamine, N, N-sec-butylpropylamine, di Butylamine, di-sec-butylamine, diisobutylamine, N, N-isobutyl-sec-butylamine, diamylamine, diisoamylamine, dihexylamine, di (2-ethylhexyl) amine, dioctylamine, N, N-methyloctadecylamine, Didecylamine, diallylamine, N N-ethyl-1,2-dimethylpropylamine, N, N-methylhexylamine, dioleylamine, distearylamine, N, N-dimethylaminomethylamine, N, N-dimethylaminoethylamine, N, N-dimethylamino Amylamine, N, N-dimethylaminobutylamine, N, N-diethylaminoethylamine, N, N-diethylaminopropylamine, N, N-diethylaminohexylamine, N, N-diethylaminobutylamine, N, N-diethylaminopentylamine, N , N-dipropylaminobutylamine, N, N-dibutylaminopropylamine, N, N-dibutylaminoethylamine, N, N-dibutylaminobutylamine, N, N-diisobutylaminopentylamine, N, N-methyl-laurylamino The Pyramine, N, N-ethyl-hexylaminoethylamine, N, N-distearylaminoethylamine, N, N-dioleylaminoethylamine, N, N-distearylaminobutylamine, piperidine, 2-pipecholine, 3-pipecholine, 4 -Pipecoline, 2,4-Lupetidine, 2,6-Lupetidine, 3,5-Lupetidine, 3-Piperidinmethanol, Pipecolic acid, Isonipecotic acid, Methyl isnicopetinate, Ethyl isonicopetic acid, 2-Piperidin ethanol, Pyrrolidine, 3-hydroxy Pyrrolidine, N-aminoethylpiperidine, N-aminoethyl-4-pipecholine, N-aminoethylmorpholine, N-aminopropylpiperidine, N-aminopropyl-2-pipecholine, N-aminopropyl-4-pipecholine, N-amino Examples thereof include propylmorpholine, N-methylpiperazine, N-butylpiperazine, N-methylhomopiperazine, 1-cyclopentylpiperazine, 1-amino-4-methylpiperazine, 1-cyclopentylpiperazine and the like.

  As the pigment derivative, those shown in Tables 1 to 9 can be used, but are not limited thereto. The pigment derivatives can be used alone or in admixture of two or more.

The coloring composition of the present invention can contain other organic or inorganic colorants together with the red pigment of the present invention and CI Pigment Yellow 139 pigment according to the hue of the filter segment to be formed. Examples of the organic colorant include dyes, organic pigments, natural pigments, and the like, and examples of the inorganic colorant include inorganic pigments. The inorganic pigment includes extender pigments. As the colorant, a colorant having high color developability and high heat resistance, particularly a colorant having high heat decomposition resistance is preferable, and an organic colorant is usually used, and an organic pigment is particularly preferable. An organic or inorganic coloring agent can be used individually or in mixture of 2 or more types.
Below, the specific example of the organic pigment which can be used for the coloring composition of this invention is shown with a color index number.

The coloring composition of the present invention has CI Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 12, 13, 14, 15, 16, 17, 18, 24, 31, 32, 34, 35, 35. : 1, 36, 36: 1, 37, 37: 1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 93, 94, 95 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 126, 127, 128, 129, 138, 139, 147 , 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 179, It can be used in combination with the yellow pigments such as 80,181,182,187,188,193,194,199,213.
In this case, the content of the CI Pigment Yellow 139 pigment of the present invention based on the total amount of the CI Pigment Yellow 139 pigment of the present invention and other yellow pigments varies depending on the required color characteristics, but sufficient brightness is obtained. From the viewpoint, it is preferably 10% by weight or more. When particularly high lightness is required, it is preferable to use only the CI Pigment Yellow 139 pigment of the present invention without using other yellow pigments in combination.

When forming a red filter segment from the colored composition of the present invention, a normal red pigment is used in combination.
Red pigments include CI Pigment Red 7, 14, 41, 48: 1, 48: 2, 48: 3, 48: 4, 81: 1, 81: 2, 81: 3, 81: 4, 146, 177, 178, 184, 185, 187, 200, 202, 208, 210, 246, 254, 255, 264, 270, 272, etc. can be used. In this case, the content of the CI Pigment Yellow 139 pigment of the present invention based on the total amount of the colorant (the total amount of the CI Pigment Yellow 139 pigment and the red pigment of the present invention) is preferably 0.01 to 90% by weight. 1 to 30% by weight is particularly preferable.

  In addition, the coloring composition of the present invention has titanium oxide, barium sulfate, zinc white, lead sulfate, yellow lead, etc. in order to ensure good coatability, sensitivity, developability, etc. while balancing saturation and lightness. Inorganic colorants such as zinc yellow, red rose (red iron oxide (III)), cadmium red, ultramarine blue, bitumen, chromium oxide green, cobalt green, amber, titanium black, synthetic iron black, carbon black and the like can be contained.

  When the coloring composition of the present invention contains two or more kinds of coloring agents, the coloring composition of the invention mixes two or more kinds of coloring agents, and then the obtained coloring agent mixture is used as necessary. Along with the photopolymerization initiator, it can be produced by finely dispersing in a colorant carrier by a known method. In addition, the coloring composition of the present invention can be produced by mixing each colorant separately finely dispersed in a colorant carrier.

  Further, in the coloring composition of the present invention, the colorant is sufficiently dispersed in the colorant carrier, and applied to a transparent substrate such as a glass substrate so that the dry film thickness is 0.2 to 5 μm. In order to make it easier to form, a solvent can be included. Examples of the solvent include cyclohexanone, ethyl cellosolve acetate, butyl cellosolve acetate, 1-methoxy-2-propyl acetate, diethylene glycol dimethyl ether, ethylbenzene, ethylene glycol diethyl ether, xylene, ethyl cellosolve, methyl-n amyl ketone, propylene glycol monomethyl ether toluene, methyl ethyl ketone. , Ethyl acetate, methanol, ethanol, isopropyl alcohol, butanol, isobutyl ketone, petroleum solvent and the like, and these are used alone or in combination.

  In addition, the colored composition of the present invention can contain a storage stabilizer in order to stabilize the viscosity with time of the composition. Examples of storage stabilizers include quaternary ammonium chlorides such as benzyltrimethyl chloride and diethylhydroxyamine, organic acids such as lactic acid and oxalic acid, and organic acids such as methyl ether, t-butylpyrocatechol, tetraethylphosphine, and tetraphenylphosphine. Examples thereof include phosphine and phosphite.

  The coloring composition of the present invention can be prepared in the form of inkjet ink, gravure offset printing ink, waterless offset printing ink, silk screen printing ink, solvent development type or alkali development type colored resist material. The colored resist material is prepared by dispersing the CI Pigment Yellow 139 pigment of the present invention and, if necessary, other colorants in a composition containing a thermoplastic resin, a thermosetting resin or a photosensitive resin, a monomer, and a photopolymerization initiator. It is a thing.

  The CI Pigment Yellow 139 pigment of the present invention and other colorants used as necessary are in a ratio of 1.5 to 7% by weight in the total color composition when the filter segment is formed by photolithography. It is preferable to contain. Moreover, when forming a filter segment by a printing method, it is preferable to contain in a ratio of 1.5 to 40 weight% in total in a coloring composition. In any case, the colorant is preferably contained in the final filter segment in a proportion of 10 to 40% by weight, more preferably 20 to 40% by weight, the remainder from the resinous binder provided by the colorant carrier. Become substantial.

  The coloring composition of the present invention is mixed with coarse particles of 5 μm or more, preferably coarse particles of 1 μm or more, more preferably 0.5 μm or more and coarse particles by means of centrifugation, sintered filter, membrane filter or the like. It is preferable to remove dust.

Next, the color filter of the present invention will be described.
The color filter of the present invention comprises at least one red filter segment, at least one blue filter segment, at least one green filter segment, wherein the at least one red filter segment comprises a red pigment. Formed using the composition.

  The blue filter segment can be formed using a normal blue coloring composition. The blue coloring composition may be a blue pigment such as CI Pigment Blue 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 6, 16, 60 or the like instead of the CI Pigment Yellow139 pigment of the present invention. It is a composition obtained using this. Purple pigments such as C.I. Pigment Violet 1, 19, 23, 27, 32, 42 can be used in combination with the blue coloring composition.

The color filter of this invention can be manufactured by forming the filter segment of each color on a transparent substrate using the coloring composition of this invention by the printing method or the photolithographic method.
As the transparent substrate, a glass plate or a resin plate such as polycarbonate, polymethyl methacrylate, or polyethylene terephthalate is used.

  The formation of each color filter segment by the printing method can be patterned simply by repeating the printing and drying of the colored composition prepared as the above various printing inks. Therefore, the color filter manufacturing method is low-cost and excellent in mass productivity. ing. Furthermore, it is possible to print a fine pattern having high dimensional accuracy and smoothness by the development of printing technology. In order to perform printing, it is preferable that the ink does not dry and solidify on the printing plate or on the blanket. Control of ink fluidity on a printing press is also important, and ink viscosity can be adjusted with a dispersant or extender pigment.

  When forming each color filter segment by a photolithography method, the colored composition prepared as the solvent developing type or alkali developing type colored resist material is applied on a transparent substrate, such as spray coating, spin coating, slit coating, roll coating, etc. By a coating method, coating is performed so that the dry film thickness is 0.2 to 5 μm. If necessary, the dried film is exposed to ultraviolet light through a mask having a predetermined pattern provided in contact with or non-contact with the film. Then, after immersing in a solvent or an alkaline developer, or spraying the developer with a spray or the like to remove the uncured portion to form a desired pattern, the same operation is repeated for other colors to produce a color filter. be able to. Furthermore, in order to accelerate the polymerization of the colored resist material, heating can be performed as necessary. According to the photolithography method, a color filter with higher accuracy than the above printing method can be manufactured.

In development, an aqueous solution such as sodium carbonate or sodium hydroxide is used as an alkali developer, and an organic alkali such as dimethylbenzylamine or triethanolamine can also be used. Moreover, an antifoamer and surfactant can also be added to a developing solution.
In order to increase the UV exposure sensitivity, after coating and drying the colored resist material, a water-soluble or alkali-soluble resin such as polyvinyl alcohol or a water-soluble acrylic resin is applied and dried to form a film that prevents polymerization inhibition by oxygen. Thereafter, ultraviolet exposure can also be performed.

The color filter of the present invention can be produced by an electrodeposition method, a transfer method, or the like in addition to the above method, but the colored composition of the present invention can be used in any method. The electrodeposition method is a method for producing a color filter by using a transparent conductive film formed on a transparent substrate and forming each color filter segment on the transparent conductive film by electrophoresis of colloidal particles. is there.
The transfer method is a method in which a color filter layer is formed in advance on the surface of a peelable transfer base sheet, and this color filter layer is transferred to a desired transparent substrate.

Hereinafter, the present invention will be described based on examples, but the present invention is not limited thereto. In the examples and comparative examples, “parts” means “parts by weight”.
First, the acrylic resin solution and yellow pigment used in Examples and Comparative Examples will be described.

(Preparation of acrylic resin solution)
450 parts of cyclohexanone was placed in a reaction vessel, heated to 80 ° C. while injecting nitrogen gas into the vessel, and a mixture of the following monomer and thermal polymerization initiator was added dropwise at the same temperature over 1 hour to carry out a polymerization reaction.
Methacrylic acid 20.0 parts Methyl methacrylate 10.0 parts butyl methacrylate 55.0 parts Hydroxyethyl methacrylate 15.0 parts Azobisisobutyronitrile 4.0 parts After the addition, the reaction was further carried out at 80 ° C for 3 hours, and then azobis A solution in which 1.0 part of isobutyronitrile was dissolved in 50 parts of cyclohexanone was added, and the reaction was further continued at 80 ° C. for 1 hour to obtain an acrylic resin solution having a weight average molecular weight of about 40,000.
After cooling to room temperature, about 2 g of the resin solution was sampled, heated and dried at 180 ° C. for 20 minutes to measure the nonvolatile content, and cyclohexanone was added to the previously synthesized resin solution so that the nonvolatile content was 20% by weight. To prepare an acrylic resin solution.

Next, CI Pigment Yellow 139 pigment was subjected to a salt milling treatment by the following method to produce a yellow-treated pigment.
[Yellow Pigment 1]
CI Pigment Yellow 139 pigment (“Irgafore Yellow 2R-CF” manufactured by Ciba Geigy): 500 parts, sodium chloride: 500 parts, and diethylene glycol: 250 parts were charged in a stainless steel 1 gallon kneader (Inoue Seisakusho) at 8 ° C. Kneaded for hours. Next, the kneaded product is poured into 5 liters of warm water, stirred for 1 hour while heating to 70 ° C. to form a slurry, repeatedly filtered and washed with water to remove sodium chloride and diethylene glycol, and then dried at 80 ° C. overnight. 490 parts of yellow pigment 1 were obtained.

[Yellow Pigment 2]
CI Pigment Yellow 139 pigment (“Irgafore Yellow 2R-CF” manufactured by Ciba Geigy Co.): 500 parts, sodium chloride: 500 parts, and diethylene glycol: 250 parts were charged in a stainless steel 1 gallon kneader (Inoue Seisakusho) at 2 ° C. Kneaded for hours. Next, the kneaded product is poured into 5 liters of warm water, stirred for 1 hour while heating to 70 ° C. to form a slurry, repeatedly filtered and washed with water to remove sodium chloride and diethylene glycol, and then dried at 80 ° C. overnight. 490 parts of yellow pigment 2 were obtained.

[Example 1]
A mixture having the following composition was stirred and mixed uniformly, then dispersed with a sand mill for 5 hours using zirconia beads having a diameter of 1 mm, and then filtered with a 5 μm filter to prepare a red pigment dispersion.
Yellow Pigment 1 2.1 parts Red Pigment CI Pigment Red 177 6.9 parts ("Chromophthal Red A2B" manufactured by Ciba Geyky)
Pigment dispersant (Dye derivative A-4) 1.0 part Acrylic resin solution 50.0 parts Cyclohexanone 40.0 parts

Next, the mixture having the following composition was stirred and mixed so as to be uniform, and then filtered through a 1 μm filter to obtain an alkali developing red resist material.
Red pigment dispersion 60.0 parts Acrylic resin solution 11.0 parts Dipentaerythritol penta- and hexaacrylate 4.2 parts (Toagosei "M400")
Photopolymerization initiator (“Irgacure 907” manufactured by Ciba Geigy) 1.2 parts Sensitizer (“EAB-F” manufactured by Hodogaya Chemical Co., Ltd.) 0.4 parts Cyclohexanone 23.2 parts

[Comparative Example 1]
An alkali development type red resist material was prepared in the same manner as in Example 2 except that the yellow pigment 1 was changed to the yellow pigment 2.

  The resist material obtained in Example 1 and Comparative Example 1 was applied onto a 100 mm × 100 mm, 1.1 mm thick glass substrate using a spin coater, and x = 0.630 after the exposure / development / heating step. A coated substrate having such a film thickness was obtained. After drying at 70 ° C. for 20 minutes, a striped pattern was exposed with an integrated light quantity of 300 mJ using an ultrahigh pressure mercury lamp, and developed with an alkaline developer for 90 seconds to form a striped red filter segment. The alkali developer is composed of sodium carbonate 1.5% by weight, sodium hydrogen carbonate 0.5% by weight, anionic surfactant (“Perilex NBL” manufactured by Kao Corporation) 8.0% by weight and water 90% by weight. . Next, the coated substrate was heated at 230 ° C. for 1 hour and allowed to cool, and then the chromaticity (Y, x, y) of the obtained green coating film with a C light source was measured with a microspectrophotometer (“OSP-” manufactured by Olympus Optical Co., Ltd.). SP100 ").

Further, a substrate for contrast measurement was prepared by the same method as described above except that the entire surface was exposed instead of the striped pattern exposure, and the brightness was measured using the measuring apparatus shown in FIG. The ratio was calculated. The results are shown in Table 10.
The light emitted from the backlight unit for liquid crystal display (7) passes through the polarizing plate (6), is polarized, and passes through the dried coating film (4) of the colored composition applied on the glass substrate (5). And reaches the polarizing plate (3). If the polarization planes of the polarizing plate (6) and the polarizing plate (3) are parallel, light is transmitted through the polarizing plate (3), but if the polarization plane is perpendicular, the light is transmitted by the polarizing plate (3). Blocked. However, when light polarized by the polarizing plate (6) passes through the dried coating film (4) of the colored composition, scattering by pigment particles or the like occurs, and a part of the polarization plane is displaced. Is parallel, the amount of light transmitted through the polarizing plate (3) is reduced. When the deflecting plate is perpendicular, a part of the light is transmitted through the polarizing plate (3). This transmitted light was measured as the luminance on the polarizing plate, and the ratio (contrast ratio) between the luminance when the polarizing plate was parallel and the luminance when it was orthogonal was calculated.
Contrast ratio = Parallel brightness / Direct brightness

Accordingly, when scattering occurs due to the pigment of the dried coating film (4) of the coloring composition, the brightness when parallel is reduced and the brightness when perpendicular is increased, the contrast ratio is lowered.
As the luminance meter (1), a color luminance meter BM-5A manufactured by Topcon Corporation was used, and a polarizing film LLC2-92-18 manufactured by Sanritsu was used as the polarizing plate. In the measurement, a black mask (2) having a 1 cm square hole was applied to the measurement portion in order to block unnecessary light.

表１０に示すように、実施例１の着色組成物（レジスト材）を用いて形成された赤色塗膜は、明度Ｙは比較例１と同等だが、コントラスト比がアッフ゜していることが分かる。

As shown in Table 10, the red coating film formed using the colored composition (resist material) of Example 1 has the same brightness Y as Comparative Example 1, but the contrast ratio is increased.

[Example 2]
In order to produce a color filter comprising a red filter segment, a green filter segment, and a blue filter segment, a green resist material and a blue resist material were produced by the following method.

[Reference Example 1]
A mixture having the following composition was uniformly stirred and mixed, and then dispersed with a sand mill for 5 hours using zirconia beads having a diameter of 1 mm, and then filtered with a 5 μm filter to prepare a green pigment dispersion.
Yellow pigment 1 1.8 parts Green pigment CI Pigment Green 36 7.2 parts ("Rionol Green 6YK" manufactured by Toyo Ink Co., Ltd.)
Pigment dispersant (Dye derivative A-44) 1.0 part Acrylic resin solution 50.0 parts Cyclohexanone 40.0 parts

Next, the mixture having the following composition was stirred and mixed so as to be uniform, and then filtered through a 1 μm filter to obtain an alkali developing type green resist material.
Green pigment dispersion 60.0 parts Acrylic resin solution 11.0 parts Dipentaerythritol penta- and hexaacrylate 4.2 parts (Toagosei Co., Ltd. “M400”)
Photopolymerization initiator (“Irgacure 907” manufactured by Ciba Geigy) 1.2 parts Sensitizer (“EAB-F” manufactured by Hodogaya Chemical Co., Ltd.) 0.4 parts Cyclohexanone 23.2 parts

[Reference Example 2]
An alkali-developable green resist material was prepared in the same manner as in Reference Example 1 except that yellow pigment 1 was changed to yellow pigment 2.

(Blue resist material)
After uniformly stirring and mixing a mixture having the following composition, the mixture was dispersed in a sand mill for 5 hours using zirconia beads having a diameter of 1 mm, and then filtered through a 5 μm filter to prepare a copper phthalocyanine dispersion.
ε-type copper phthalocyanine pigment CI Pigment Blue 15: 6 10.0 parts ("Heliogen Blue L-6700F" manufactured by BASF)
Dispersant (“Solsper's 20000” manufactured by Zeneca) 2.0 parts acrylic resin solution 40.0 parts cyclohexanone 48.0 parts

Next, a mixture having the following composition was stirred and mixed so as to be uniform, and then filtered through a 1 μm filter to obtain a blue resist material.
Copper phthalocyanine dispersion 60.0 parts Acrylic resin solution 11.0 parts Dipentaerythritol penta- and hexaacrylate 4.2 parts (Toagosei Co., Ltd. “M400”)
Photopolymerization initiator (“Irgacure 907” manufactured by Ciba Geigy) 1.2 parts Sensitizer (“EAB-F” manufactured by Hodogaya Chemical Co., Ltd.) 0.4 parts Cyclohexanone 23.2 parts

  The red resist material obtained in Example 1 was applied to a glass substrate to the same film thickness as in Example 1 by spin coating. After drying, striped pattern exposure was performed with an exposure machine and development was performed with an alkaline developer for 90 seconds to form a striped red filter segment. The alkali developer is composed of sodium carbonate 1.5% by weight, sodium hydrogen carbonate 0.5% by weight, anionic surfactant (“Perilex NBL” manufactured by Kao Corporation) 8.0% by weight and water 90% by weight. .

Next, in the same manner as the red resist material, the green resist material obtained in Reference Example 1 was applied to a film thickness such that x = 0.315 and y = 0.580 after the exposure, development, and heating steps. After drying, a striped pattern adjacent to the red filter segment was exposed with an exposure machine to form a striped green filter segment.
Further, in the same manner as the red resist material, a blue resist material was applied to a thickness such that x = 0.134 and y = 0.127 after the exposure, development, and heating steps. After drying, striped blue filter segments adjacent to the red and green filter segments were formed.
The shape of each color filter segment was good, and the resolution was also good. Finally, the obtained color filter is heated in an oven at 230 ° C. for 30 minutes to completely react the remaining polymerizable functional groups, and a red, green and blue three-color stripe shape is formed on the transparent substrate. A color filter having a filter segment was obtained.

[Comparative Example 2]
The red resist material was changed to the red resist material obtained in Comparative Example 1 and the green resist material was changed to the green resist material obtained in Reference Example 2 in the same manner as in Example 2 on the transparent substrate. A color filter having filter segments in the form of stripes of three colors of red, green and blue was obtained.

  The x, y, and Y colors of the color filters obtained in Example 2 and Comparative Example 2 were measured using a microspectrophotometer (“OSP-SP100” manufactured by Olympus Optical Co., Ltd.). When light is transmitted through all three colors, white light is obtained, and x, y, and Y of the white light are calculated from x, y, and Y of each color. The results are shown in Table 11. As shown in Table 11, the Y value of the color filter obtained in Example 2 is higher than that obtained in the comparative example. When the Y value is high, a white color filter becomes bright.

1 Luminance meter 2 Mask (black)
3 Polarizing plate 4 Colored composition dried coating film 5 Glass substrate 6 Polarizing plate 7 Backlight unit

Claims (4)

A colorant carrier comprising a transparent resin, a precursor thereof or a mixture thereof;
A red pigment as a colorant;
CI Pigment Yellow 139 pigment kneaded with a water-soluble inorganic salt as a colorant and a water-soluble organic solvent for 8 hours or more,
A composition comprising:
When the CI Pigment Yellow 139 pigment formed a coating film using a yellow composition obtained by dispersing the pigment in the colorant carrier, the absorbance (A425) and the wavelength of the coating film with respect to light having a wavelength of 425 nm were 480 nm. The ratio (A425) of the absorbance (A425) with respect to the light with a wavelength of 425 nm and the absorbance with respect to the light with a wavelength of 530 nm (A530) (A425). / A530) having a spectral characteristic that the value is 17 or more, a coloring composition for a color filter. 2. The coloring composition according to claim 1, comprising a pigment derivative having a basic group or a triazine derivative having a basic group. The coloring composition according to claim 2, wherein the content of the pigment derivative having a basic group or the triazine derivative having a basic group is 0.001 to 40% by weight based on the C.I. Pigment Yellow139 pigment. It comprises at least one red filter segment, at least one blue filter segment, and at least one green filter segment, and the at least one red filter segment is formed from the colored composition according to any one of claims 1 to 3. A color filter characterized by having

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