JP2014071320A - Manufacturing method for color filter and transparent-protective-film forming resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a color filter which suppresses elution of colorant into a transparent protective film formed on a colored layer having colored pixels containing dye-based colorant.SOLUTION: A method of manufacturing a color filter involves forming a transparent protective film on a colored layer, which has colored pixels containing dye-based colorant selected from a group of dyes and lake pigments, of a color filter intermediate product by applying a transparent-protective-film forming resin composition containing a film-forming resin and a solvent which contains 60 mass% or more of a solvent 'a', with respect to a total solvent mass, whose SP value differs from that of the dye-based colorant contained in the colored pixels by more than 0.5 in absolute terms.

Description

  The present invention relates to a method for producing a color filter and a resin composition for forming a transparent protective film used in the production method.

Color filters are used in liquid crystal display devices such as color liquid crystal displays and organic light emitting display devices. For example, in the case of a color liquid crystal display, a backlight is used as a light source, the amount of light is controlled by electrically driving the liquid crystal, and color expression is performed by the light passing through a color filter. Therefore, a color filter must be present in the color representation of a liquid crystal television and plays a major role in determining the performance of the display. In the organic light emitting display device, when a color filter is used for the white light emitting organic light emitting element, a color image is formed as in the liquid crystal display device.
As a recent trend, power saving of such an image display device is demanded, and in order to improve the utilization efficiency of the backlight, it is particularly demanded to increase the brightness of the color filter. This is a big problem especially for mobile displays (cell phones, smartphones, tablet PCs, etc.).

Here, the color filter is generally formed on a transparent substrate, a transparent layer formed on the transparent substrate and having a colored pixel pattern of the three primary colors of red, green, and blue, and on the transparent substrate so as to partition each colored pixel. And a transparent protective film formed on the colored layer.
As a method for forming a colored layer, a pigment dispersion method using a pigment having excellent heat resistance and light resistance as a colorant has been widely used. However, with color filters using pigments, it has become difficult to achieve the current demand for higher brightness.

  As one means for achieving high brightness, a colored resin composition for a color filter using a dye-based color material such as a dye having a generally higher transmittance than a pigment or a lake pigment obtained by rake-forming a dye is used. Formation of a colored layer has been studied. For example, in blue pixels of color filters, instead of copper phthalocyanine pigment (PB15: 6) that has been widely used and has excellent heat resistance and light resistance, triarylmethane dyes and triarylmethane dyes are raked. The use of such lake pigments has been studied (for example, Patent Documents 1 and 2).

  However, when a dye-based color material is used as a color material to be included in the colored layer, the dye-based color material is eluted into the transparent protective film formed on the colored layer, and the color of the transparent protective film causes the brightness of the color filter. There is a problem that decreases.

JP 2010-85444 A JP 2009-186657 A

  The present invention has been made to solve the above problems, and elution of a coloring material from a colored layer having a colored pixel containing a dye-based coloring material to a transparent protective film formed on the colored layer. It aims at providing the resin composition for transparent protective film formation used for the manufacturing method of the color filter which suppresses and can obtain a high-intensity color filter, and the manufacturing method of the said color filter.

  The method for producing a color filter according to the present invention forms a film on the colored layer of the color filter intermediate product including a colored layer having a colored pixel containing a dye-based color material selected from the group consisting of a dye and a lake pigment. An organic resin and a solvent, and the solvent contains a solvent a having an SP value difference of more than 0.5 with respect to the dye-based color material contained in the colored pixel of 60% by mass or more based on the whole solvent. A transparent protective film is formed by applying a transparent protective film-forming resin composition contained in a proportion.

  In the method for producing a color filter according to the present invention, the solvent a in which the absolute value of the SP value difference from the dye-based colorant exceeds 0.5 is propylene glycol monomethyl ether acetate, cyclohexanol acetate, propylene glycol monomethyl ether, diethylene glycol. It is preferably selected from the group consisting of ethyl methyl ether and dipropylene glycol dimethyl ether.

  The resin composition for forming a transparent protective film according to the present invention is a transparent coating covering the colored layer of a color filter having a colored layer having a colored pixel containing a dye-based color material selected from the group consisting of a dye and a lake pigment. A resin composition for forming a protective film, which contains a film-forming resin and a solvent, and the solvent has an absolute value of an SP value difference of 0.00 with respect to a dye-based color material contained in the colored pixel. It contains more than 5 solvent a in a proportion of 60% by mass or more with respect to the whole solvent.

  According to the method for producing a color filter according to the present invention, a color filter intermediate product including a colored layer having a colored pixel containing a dye-based color material having a high transmittance is used, and further, a color containing a dye-based color material is used. Since elution of the coloring material from the colored layer having pixels to the transparent protective film formed on the colored layer can be suppressed, a high-luminance color filter can be manufactured.

It is sectional drawing which shows an example of a general color filter typically. It is sectional drawing which shows typically an example of the intermediate product of the color filter used for the manufacturing method of the color filter which concerns on this invention.

Hereinafter, the transparent protective film-forming resin composition used in the present invention is first described in detail, and then the method for producing a color filter according to the present invention is described in detail.
In the present invention, (meth) acrylic resin means acrylic resin and / or methacrylic resin, and (meth) acrylate means acrylate and / or methacrylate.
In the present invention, the resin is a concept including a polymer in addition to a monomer and an oligomer.
In the present invention, ionizing radiation means electromagnetic waves or charged particles having energy capable of polymerizing and curing molecules, such as all ultraviolet rays (UV-A, UV-B, UV-C), visible light, Examples include gamma rays, X-rays, and electron beams.
In the present invention, chromaticity is a value in CIE chromaticity coordinates.
In addition, both the dye and the lake pigment have a chemical structure skeleton of the dye, and in the present invention, these are collectively referred to as “dye color material”.

<Resin composition for forming transparent protective film>
As shown in FIG. 1, the color filter generally includes a transparent substrate 1, a colored layer 2 having a colored pixel including red pixels 2R, green pixels 2G, and blue pixels 2B formed on the transparent substrate 1, a light shielding portion. 3 and a transparent protective film 4 formed on the colored layer 2.
The resin composition for forming a transparent protective film used in the present invention covers the colored layer of a color filter including a colored layer having a colored pixel containing a dye-based color material selected from the group consisting of a dye and a lake pigment. A resin composition for forming a transparent protective film, which contains a film-forming resin and a solvent, and the solvent has an absolute value of an SP value difference of 0 with respect to a dye-based color material contained in the colored pixel. More than .5 of the solvent a is contained in a proportion of 60% by mass or more with respect to the whole solvent.
The SP value is a solubility parameter, and is calculated from the square root of the cohesive energy density by regular solution theory. Since the cohesive energy is equivalent to the evaporation energy, the solubility parameter (SP value) δ can be obtained by the following formula (1) using the molar volume V and the evaporation energy Ev per mole. Further, the SP value (δi) of the color material can be obtained by the following formula (2) using the evaporation energy (Δei) and the molar volume (Δvi) of atoms or atomic groups constituting the color material.
δ = (Ev / V) ^1/2 Formula (1)
δi = (Δei / Δvi) ^1/2 Equation (2)
Ev: Evaporation energy V: Molar volume Δei: Evaporation energy of atom or atomic group of i component Δvi: Molar volume of atom or atomic group of i component

  By forming a transparent protective film of a color filter using the resin composition for forming a transparent protective film, it is contained in the colored pixel when applied on a colored layer having a colored pixel containing a dye-based color material. The dye-based color material hardly elutes or does not elute into the transparent protective film-forming resin composition. The compatibility between the solvent and the dye-based color material increases as the SP values of the solvents become closer. However, in the present invention, the difference in the SP value from the dye-based color material as the solvent contained in the transparent protective film-forming resin composition. By using a solvent containing a solvent a having an absolute value of more than 0.5 in an amount of 60% by mass or more, more preferably 65% by mass or more, and still more preferably 70% by mass or more based on the whole solvent, a dye-based color Elution of material can be suppressed.

  The solvent a can be appropriately selected and used depending on the SP value of the dye-based color material contained in the colored pixel. For example, propylene glycol monomethyl ether acetate (SP value 8.7), cyclohexanol acetate (SP value 8.8), propylene glycol monomethyl ether (SP value 10.2), diethylene glycol ethyl methyl ether (SP value 8.2), dipropylene glycol dimethyl ether (SP value 7.9) and the like.

  The SP value of a triarylmethane dye and a lake pigment obtained by lake- ing a triarylmethane dye, which are typical dye dyes contained in the colored pixels, is 9.5.

  The solvent contained in the transparent protective film-forming resin composition is less than 40% by mass with respect to the total solvent, and is a solvent other than the solvent a, that is, a dye-based color material contained in the colored pixel. And a solvent having an SP value difference of 0.5 or less. Specific examples of the other solvent include alcohols such as methanol, ethanol, n-propanol, isopropanol, ethylene glycol and propylene glycol, terpenes such as α- or β-terpineol, acetone, methyl ethyl ketone, Ketones such as cyclohexanone and N-methyl-2-pyrrolidone, aromatic hydrocarbons such as toluene, xylene and tetramethylbenzene, cellosolve, methylcellosolve, ethylcellosolve, carbitol, methylcarbitol, ethylcarbitol, butylcarbi Tall, propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, triethylene glycol monomethyl ether, triethylene glycol Glycol ethers such as ethyl monoethyl ether, ethyl acetate, butyl acetate, cellosolve acetate, ethyl cellosolve acetate, butyl cellosolve acetate, carbitol acetate, ethyl carbitol acetate, butyl carbitol acetate, propylene glycol monoethyl ether acetate, ethylene glycol monomethyl Examples include acetates such as ether acetate and 3-methoxybutyl acetate.

  As the solvent, among them, as the solvent a, at least one selected from the group consisting of propylene glycol monomethyl ether acetate, cyclohexanol acetate, propylene glycol monomethyl ether, diethylene glycol ethyl methyl ether, and dipropylene glycol dimethyl ether is 60 to 60. Contains 100% by mass and contains 0-40% by mass of at least one selected from cyclohexanone (SP value 9.8) and ethylene glycol monomethyl ether acetate (SP value 9.0) as a solvent other than the solvent a. It is preferable that

  The content of the solvent in the transparent protective film-forming resin composition is not particularly limited as long as it can uniformly dissolve or disperse each component in the composition, but in the present invention, The solid content concentration in the composition is preferably 15 to 35% by mass, particularly preferably 15 to 30% by mass. By being the said range, it can be set as the viscosity suitable for application | coating. In the present invention, the “solid content” means all components other than the solvent.

  The film-forming resin contained in the transparent protective film-forming resin composition has a film-forming ability and can impart characteristics such as film strength and hardness required for the transparent protective film. It is. The film-forming resin is not particularly limited, and examples thereof include ionizing radiation curable resins and thermosetting resins conventionally used for forming a transparent protective film for a color filter.

As the ionizing radiation curable resin, for example, the following monomers, oligomers and polymers can be used.
Examples of the monomer include allyl acrylate, benzyl acrylate, butoxyethyl acrylate, butoxyethylene glycol acrylate, cyclohexyl acrylate, dicyclopentanyl acrylate, 2-ethylhexyl acrylate, glycerol acrylate, glycidyl acrylate, 2-hydroxyethyl acrylate, 2- Hydropropyl acrylate, isobornyl acrylate, isodexyl acrylate, isooctyl acrylate, lauryl acrylate, 2-methoxyethyl acrylate, methoxyethylene glycol acrylate, phenoxyethyl acrylate, stearyl acrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, 1, 4-butanediol Acrylate, 1,5-pentanediol diacrylate, 1,6-hexanediol diacrylate, 1,3-propanediol acrylate, 1,4-cyclohexanediol diacrylate, 2,2-dimethylolpropane diacrylate, glycerol diacrylate , Tripropylene glycol diacrylate, glycerol triacrylate, trimethylolpropane triacrylate, polyoxyethylated trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, triethylene glycol diacrylate, polyoxypropyltrimethylolpropane tri Acrylate, butylene glycol diacrylate, 1,2,4-butanetriol triacryl 2,2,4-trimethyl-1,3-pentanediol diacrylate, diallyl fumarate, 1,10-decanediol dimethyl acrylate, dipentaerythritol hexaacrylate, dipentaerythritol pentaacrylate, γ-methacryloxypropyl Trimethoxysilane, 1-vinyl-2-pyrrolidone, 2-hydroxyethylacryloyl phosphate, tetrahydrofurfuryl acrylate, dicyclopentenyl acrylate, dicyclopentenyloxyethyl acrylate, 3-butanediol diacrylate, neopentyl glycol diacrylate, Polyethylene glycol diacrylate, hydroxypivalate ester neopentyl glycol diacrylate, phenol-ethylene oxide modified polymer Relate, phenol-propylene oxide modified acrylate, N-vinyl-2-pyrrolidone, bisphenol A-ethylene oxide modified diacrylate, pentaerythritol diacrylate monostearate, tetraethylene glycol diacrylate, polypropylene glycol diacrylate, trimethylolpropane propylene oxa Acrylate-based monomers such as hydrogenated triacrylate, isocyanuric acid ethylene oxide modified triacrylate, trimethylolpropane ethylene oxide modified triacrylate, pentaerythritol pentaacrylate, pentaerythritol hexaacrylate, pentaerythritol tetraacrylate, and these acrylate groups Those substituted with methacrylate groups And the like. Examples of commercially available monomers include SR399 (manufactured by Sartomer Co., Ltd.), Aronix M-400 (manufactured by Toagosei Co., Ltd.), and Aronix M-450 (manufactured by Toagosei Co., Ltd.).
Examples of the oligomer include a urethane (meth) acrylate oligomer in which a (meth) acrylate group is bonded to an oligomer having a polyurethane structure, a polyester (meth) acrylate oligomer in which a (meth) acrylate group is bonded to an oligomer having a polyester structure, and epoxy. An epoxy (meth) acrylate oligomer in which a (meth) acrylate group is bonded to an oligomer having a group is exemplified.
These monomers and oligomers may be used alone or in combination of two or more. Moreover, the said monomer and the said oligomer can also be used in combination with the thermosetting resin mentioned later.
The total content of the monomer and the oligomer is not particularly limited, but when the transparent protective film-forming resin composition is used as an ionizing radiation curable composition, the total solid content of the transparent protective film-forming resin composition It is preferable that it is 1-40 mass%.

Examples of the polymer include polymerizable monomers such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate. , Isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-pentyl acrylate, n-pentyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, n-octyl Acrylate, n-octyl methacrylate, n-decyl acrylate, n-decyl methacrylate And one or more selected from the group consisting of silicate, 2-hydroxyethyl methacrylate, benzyl methacrylate, styrene, α-methylstyrene, N-vinyl-2-pyrrolidone, glycidyl (meth) acrylate, acrylic acid, methacrylic acid, acrylic Examples thereof include polymers or copolymers composed of at least one selected from the group consisting of dimers of acids, itaconic acid, crotonic acid, maleic acid, fumaric acid, vinyl acetic acid, and acid anhydrides thereof.
Examples of commercially available polymers include, for example, Epicoat 180S70 (manufactured by Yuka Shell Epoxy Co., Ltd.), Aronix M-5600 (manufactured by Toagosei Co., Ltd.), Aronix M-6200 (manufactured by Toagosei Co., Ltd.), Aronix M-7100 (manufactured by Toagosei Co., Ltd.) and Aronix M-9050 (manufactured by Toagosei Co., Ltd.).
These polymers may be used alone or in combination of two or more. Moreover, the said polymer can also be used in combination with the thermosetting resin mentioned later.
The content of the polymer is not particularly limited, but when the transparent protective film-forming resin composition is used as an ionizing radiation curable composition, it is 1 to 40 with respect to the total solid content of the transparent protective film-forming resin composition. It is preferable that it is mass%.

  Examples of the thermosetting resin include epoxy resins, novolak resins, urea resins, melamine resins, acrylic resins, unsaturated polyester resins, alkyd resins, polyurethanes, polyolefin resins, thermosetting polyimides, and the like. Among the above-mentioned, an epoxy resin is preferable, and an epoxy acrylate resin having a fluorene structure is particularly preferable. Moreover, it is also preferable to use a novolak resin, and examples of the novolak resin include phenol, o-cresol, m-cresol, p-cresol, o-ethylphenol, m-ethylphenol, p-ethylphenol, propylphenol, Examples thereof include polymers obtained by condensing phenol compounds such as n-butylphenol, t-butylphenol, and bisphenol A with aldehyde compounds such as formaldehyde, acetaldehyde, propionaldehyde, and salicylaldehyde.

  Although content of the said thermosetting resin is not specifically limited, When using the said resin composition for transparent protective film formation as a thermosetting type composition, it is 5 with respect to the total solid of the resin composition for transparent protective film formation It is preferable that it is -95 mass%, and it is especially preferable that it is 8-90 mass%.

Moreover, the said thermosetting resin can be used in combination with the monomer, oligomer, and polymer which are used as the ionizing radiation curable resin mentioned above.
When the transparent protective film-forming resin composition is used as a thermosetting composition, the total content of the monomer, oligomer and polymer is not particularly limited, but is based on the total solid content of the transparent protective film-forming resin composition It is preferable that it is 1-30 mass%.

  The film-forming resin may further contain other binder components as necessary without departing from the spirit of the present invention. Other binder components include, for example, ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, ethylene vinyl copolymer, polystyrene, acrylonitrile-styrene copolymer, ABS resin, polymethacrylic acid resin, ethylene methacrylic acid. Acid resin, polyvinyl chloride resin, chlorinated vinyl chloride, polyvinyl alcohol, cellulose acetate propionate, cellulose acetate butyrate, nylon 6, nylon 66, nylon 12, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyvinyl acetal, polyether Ether ketone, polyether sulfone, polyphenylene sulfide, polyarylate, polyvinyl butyral, phenoxy resin, thermoplastic polyimide resin, polyamide De resins, polyamic acid resins, polyether imide resins.

  The resin composition for forming a transparent protective film may further contain a polymerization initiator used as a photopolymerization initiator or a thermal polymerization initiator. Examples of the polymerization initiator include benzyl (also called bibenzoyl), benzoin isobutyl ether, benzoin isopropyl ether, benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-benzoyl-4′-methyldiphenyl sulfide, benzylmethyl ketal, Dimethylaminomethylbenzoate, 2-n-butoxyethyl-4-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, 3,3′-dimethyl-4-methoxybenzophenone, methylobenzoyl formate, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one, 1- (4-dodecyl) Feni ) -2-hydroxy-2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1- (4-isopropylphenyl) -2- Hydroxy-2-methylpropan-1-one, 2-chlorothioxanthone, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 1-chloro-4-propoxythioxanthone, etc. Is mentioned. Examples of commercially available polymerization initiators include Irgacure 184, Irgacure 369, Irgacure 651, Irgacure 907 (all manufactured by Ciba Specialty Chemicals), Darocur (Merck), Adeka 1717 (Asahi Denka Kogyo) And other ketone compounds such as 2,2′-bis (o-chlorophenyl) -4,5,4′-tetraphenyl-1,2 ′ biimidazole (manufactured by Kurokin Kasei Co., Ltd.). Examples thereof include imidazole compounds.

  In addition to the above-mentioned thermal polymerization initiators, for example, alkyl peroxides, acyl peroxides, ketone peroxides, alkyl hydroperoxides, peroxy dicarbonates, sulfonyl peroxides, etc. Examples thereof include organic peroxides, inorganic peroxides, azo compounds such as azonitrile, sulfinic acids, bisazides, diazo compounds and the like. Specific examples include cumene hydroperoxide, t-butyl hydroperoxide, dicumyl peroxide, di-t-butyl peroxide, benzoyl peroxide, lauroyl peroxide, peroxodisulfate, hydrogen peroxide, potassium persulfate, ammonium persulfate, Perborate, 2,2′-azobisisobutyronitrile, 1,1′-azobis (1-cyclohexane-1-carbonitrile), dimethyl-2,2′-azoisobisbutyrate, 2,2 ′ -Azobis (2-methylbutyronitrile), 2,2'-azobisisobutyronitrile, 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile), 2,2'-azobis ( 2-amidinopropane) dicarbonate, sodium azobiscyanovalerate, 2,2′-azobis (2,4-dimethylvalerontri) ), 2,2′-azobis [2- (2-imidazolin-2-yl) propane], 2,2′-azobis [2-methyl-N- [1,1-bis (hydroxymethyl) -2-hydroxy Ethyl] propionamide], 2,2′-azobis [2-methyl-N- [1,1-bis (hydroxymethyl) ethyl] propionamide], 2,2′-azobis [2-methyl-N- (2 -Hydroxyethyl) propionamide], 2,2′-azobis (2-cyanopropanol), 2,2′-azobis (2,4,4-trimethylpentane), sodium p-toluenesulfinate and the like.

  Although content of the said polymerization initiator is not specifically limited, It is preferable that it is 0.1-20 mass% with respect to the total solid of the resin composition for transparent protective film formation.

When the said resin composition for transparent protective film formation contains the said thermosetting resin, it can contain an acid anhydride further. Any acid anhydride may be used as long as it can cure the thermosetting resin to a desired hardness by heating, and examples thereof include polyvalent carboxylic acid anhydrides. Such polycarboxylic acid anhydrides include itaconic anhydride, succinic anhydride, citraconic anhydride, dodecenyl succinic anhydride, tricarballylic anhydride, maleic anhydride, hexahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, anhydrous Aliphatic polycarboxylic dianhydrides such as aliphatic or alicyclic dicarboxylic dianhydrides such as hymic acid and nadic anhydride and their derivatives; phthalic anhydride, pyromellitic anhydride, trimellitic anhydride, anhydrous Examples thereof include aromatic polyvalent carboxylic acid anhydrides such as benzophenone tetracarboxylic acid and derivatives thereof; ester group-containing acid anhydrides such as ethylene glycol bistrimellilate and glycerin tristrimellirate; Epoxy resin curing agent made of acid anhydride is also preferably used Kill.
In the present invention, among them, aliphatic or alicyclic dicarboxylic dianhydrides and derivatives thereof can be preferably used. Particularly, hexahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, trialkyltetrahydrophthalic anhydride and the like can be used. It can be preferably used.

  Although content of the said acid anhydride is not specifically limited, It is preferable that it is 1-40 mass% with respect to the total solid of the resin composition for transparent protective film formation used as a thermosetting composition, and 20-40. It is particularly preferable that the content is% by mass.

  The transparent protective film-forming resin composition further includes a sensitizer, a curing accelerator (chain transfer agent), a filler, an adhesion promoter, and an antioxidant as necessary without departing from the spirit of the present invention. Additives such as ultraviolet absorbers and anti-aggregation agents can be contained.

  The resin composition for forming a transparent protective film can be prepared by dissolving or dispersing each component other than the solvent in the solvent.

<Color filter manufacturing method>
The method for producing a color filter according to the present invention is described above on the colored layer of the color filter intermediate product including a colored layer having a colored pixel containing a dye-based color material selected from the group consisting of a dye and a lake pigment. The transparent protective film is formed by applying the resin composition for forming a transparent protective film according to the present invention.
The method for producing a color filter according to the present invention uses a color filter intermediate product provided with a colored layer having a colored pixel containing a dye-based color material having a high transmittance, and further, the above-described transparent protective film formation according to the present invention The elution of the color material from the colored layer having the colored pixels containing the dye-based color material to the transparent protective film formed on the colored layer by forming the transparent protective film using the resin composition . Therefore, the color filter obtained by the manufacturing method of the present invention has a very high brightness as compared with the conventional product.

[Color filter intermediate products]
A color filter intermediate product (hereinafter, simply referred to as “intermediate product”) used in the method for producing a color filter according to the present invention contains a dye-based color material selected from the group consisting of a dye and a lake pigment. Although it will not specifically limit if it has the colored layer which has a colored pixel, For example, as shown in FIG. 2, in the stage before the transparent protective film 4 is formed in the color filter 10 shown in FIG. That is, the color filter intermediate product 5 provided with the transparent substrate 1, the colored layer 2 having the colored pixels including the red pixel 2R, the green pixel 2G, and the blue pixel 2B formed on the transparent substrate 1, and the light shielding portion 3 is exemplified. .

(Colored layer)
The colored layer provided in the intermediate product is usually composed of a pattern of colored pixels of three or more colors, and the colored pixels are usually formed in an opening portion of a light shielding portion on a transparent substrate described later. In the present invention, the colored layer has a colored pixel containing a dye-based color material selected from the group consisting of a dye and a lake pigment.

  Examples of the dye include, but are not limited to, blue dyes such as methine dyes, anthraquinone dyes, azo dyes, triarylmethane dyes, and phthalocyanine dyes; azo dyes, anthraquinone dyes, perinone dyes, and the like. Red dyes; green dyes such as triphenylmethane basic dyes and phthalocyanine dyes; magenta dyes such as red and anthraquinone dyes; Examples include yellow dyes.

  Among these, examples of the dye that further exhibits the effects of the present invention include triarylmethane dyes having a structure represented by the following general formula (I) or the following general formula (II).

(In Formula (I) and Formula (II), R ¹ represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a halogen atom, and R ² , R ³ , R ⁴ , and R ⁵ are each independently selected. And a hydrogen atom, an alkyl group having 1 to 5 carbon atoms which may have a substituent, a phenyl group which may have a substituent, or a benzyl group which may have a substituent.

  Specific examples of the triarylmethane dye include Basic Blue 7 and Basic Blue 26.

Examples of the lake pigment include a pigment obtained by lake-forming the dye.
Among them, examples of the lake pigment that further exhibits the effects of the present invention include lake pigments obtained by lake-forming triarylmethane dyes having the structure represented by the general formula (I) or the general formula (II). Specifically, C.I. I. Pigment blue 1, C.I. I. Pigment blue 1: 2, C.I. I. Pigment blue 9, C.I. I. Pigment blue 14, C.I. I. Pigment blue 24, C.I. I. Pigment blue 56, C.I. I. Pigment blue 56: 1, C.I. I. Pigment blue 61, C.I. I. Pigment blue 61: 1, C.I. I. Pigment blue 62, C.I. I. Pigment blue 78; I. Pigment violet 3, C.I. I. Pigment violet 3: 1, C.I. I. Pigment violet 3: 3, C.I. I. Pigment violet 27, C.I. I. Pigment violet 39; I. Pigment green 1, C.I. I. Pigment green 2, C.I. I. Pigment green 4 and the like.

  Examples of other lake pigments include C.I. I. Pigment blue 2, C.I. I. Blue lake pigments such as CI Pigment Blue 17: 1; I. Pigment red 49: 1, C.I. I. Pigment red 49: 2, C.I. I. Pigment red 50: 1, C.I. I. Pigment red 52: 1, C.I. I. Pigment red 53: 1, C.I. I. Pigment red 57, C.I. I. Pigment red 58: 2, C.I. I. Pigment red 58: 4, C.I. I. Pigment red 60: 1, C.I. I. Pigment red 63: 1, C.I. I. Pigment red 63: 1, C.I. I. Pigment red 64: 1, C.I. I. Pigment red 81: 1, C.I. I. Pigment red 81: 2, C.I. I. Pigment red 83, C.I. I. Pigment red 90: 1, C.I. I. Pigment red 172, C.I. I. Pigment red 174, C.I. I. Red lake pigments such as CI Pigment Red 193; I. Pigment yellow 61, C.I. I. And yellow lake pigments such as CI Pigment Yellow 100.

The colored pixels may contain organic pigments, inorganic pigments, natural dyes, extender pigments and the like as color materials. Examples of the organic pigment include C.I. I. Pigment yellow 1, C.I. I. Pigment yellow 3, C.I. I. Pigment yellow 12, C.I. I. Pigment yellow 13, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 150, C.I. I. Pigment yellow 180, C.I. I. Yellow pigments such as C.I. Pigment Yellow 185; I. Pigment red 1, C.I. I. Pigment red 2, C.I. I. Pigment red 3, C.I. I. Pigment red 254, C.I. I. A red pigment such as C.I. Pigment Red 177; I. Pigment blue 15, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. C.I. Blue pigments such as CI Pigment Blue 15: 6; I. Pigment violet 23, C.I. I. Violet pigments such as CI Pigment Violet 19; I. And green pigments such as CI Pigment Green 36.
The said color material can be used individually or in mixture of 2 or more types.

The colored pixel can be formed using the coloring material and a composition for forming a colored layer containing a solvent, a dispersant, and the like, which will be described later, as necessary.
In the colored layer forming composition, the content of the coloring material is preferably 5 to 40% by mass, and more preferably in the range of 10 to 30% by mass, based on the total solid content of the colored layer forming composition. More preferably, it is within.

  The solvent that can be used in the colored layer forming composition is not particularly limited as long as it is an organic solvent that does not react with each component in the colored layer forming composition and can dissolve or disperse them. Specifically, for example, alcohols such as methanol, ethanol, n-propanol, isopropanol, ethylene glycol, propylene glycol, terpenes such as α- or β-terpineol, acetone, methyl ethyl ketone, cyclohexanone, N-methyl-2 -Ketones such as pyrrolidone, aromatic hydrocarbons such as toluene, xylene, tetramethylbenzene, cellosolve, methyl cellosolve, ethyl cellosolve, carbitol, methyl carbitol, ethyl carbitol, butyl carbitol, propylene glycol monomethyl ether, Propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, triethylene glycol monomethyl ether, Glycol ethers such as ethylene glycol monoethyl ether, ethyl acetate, butyl acetate, cellosolve acetate, ethyl cellosolve acetate, butyl cellosolve acetate, carbitol acetate, ethyl carbitol acetate, butyl carbitol acetate, propylene glycol monomethyl ether acetate, propylene glycol mono Examples include acetates such as ethyl ether acetate and 3-methoxybutyl acetate.

  The content of the solvent in the colored layer forming composition is not particularly limited as long as it can uniformly dissolve or disperse each component in the colored layer forming composition. In the present invention, the solid content in the colored layer forming composition is preferably in the range of 5 to 40% by mass, and more preferably in the range of 10 to 30% by mass. By being the said range, it can be set as the viscosity suitable for application | coating.

The colored layer forming composition may contain a dispersant in order to disperse the coloring material.
As such a dispersant, for example, cationic, anionic, nonionic, amphoteric, silicone, and fluorine-based surfactants can be used. Among these, polymeric surfactants (polymeric dispersants) Is preferably used. Examples of the polymer surfactant include polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene alkyl ethers such as polyoxyethylene oleyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene nonyl phenyl ether, and the like. And polyoxyethylene alkyl phenyl ethers, polyethylene glycol diesters such as polyethylene glycol dilaurate and polyethylene glycol distearate, sorbitan fatty acid esters, fatty acid-modified polyesters, and tertiary amine-modified polyurethanes. Moreover, as a commercial item of the said dispersing agent, various Solsperse dispersing agents (made by GENEKA CORPORATION), such as Solsperse 3000, 5000, 9000, 12000, 13240, 13940, 17000, 20000, 24000, 26000, and 28000, and DISPERBYK111 (Bic Chemie Japan Co., Ltd.) etc. are mentioned.
Although content of the said dispersing agent is not specifically limited, It is preferable to set it as 20-100 mass parts with respect to a total of 100 mass parts of the said color material.

The colored layer forming composition may contain a resin, a polymerization initiator, and other components as necessary.
Although it does not specifically limit as said resin, For example, the film forming resin which can be contained in the said resin composition for transparent protective film formation can be used.
The polymerization initiator can be appropriately selected from a thermal polymerization initiator, a photopolymerization initiator, and the like depending on the type of resin contained. For example, in the resin composition for forming a transparent protective film, The thing similar to the photoinitiator and thermal polymerization initiator which can be contained is mentioned.
Examples of the other components include a surfactant for improving wettability, a silane coupling agent for improving adhesion, a dispersion aid, an antifoaming agent, a repellency inhibitor, an antioxidant, an anti-aggregation agent, An ultraviolet absorber etc. are mentioned.

The colored pixel can be formed using a colored layer forming composition containing the above-described color material and other components.
The colored layer forming composition can be prepared by mixing a coloring material and other components and dispersing or dissolving them in a solvent. The mixing process is not particularly limited, and can be performed using a known disperser. Examples of the disperser include a roll mill such as a two-roll or a three-roll, a ball mill such as a vibration ball mill, a bead mill such as a paint conditioner, a continuous disk type bead mill, or a continuous annular type bead mill. Although the diameter of a bead is not specifically limited, Preferably it is 0.03-2.00 mm, More preferably, it is 0.10-1.00 mm.
In the dispersion treatment, zirconia beads or the like may be added as appropriate, and dispersion may be performed for several hours using a paint shaker (manufactured by Asada Steel Corporation) or the like. For example, after dispersion for 1 hour with a relatively large bead diameter of 2 mm zirconia beads, it may be further dispersed for 2 hours with a relatively small bead diameter of 0.1 mm zirconia beads. Moreover, it is preferable to filter with a membrane filter of 5.0 μm after the dispersion treatment, for example. Thereby, the aggregate and the foreign material in the composition for colored layer formation can be removed, the dispersibility of a coloring material can be improved more, and the transmittance | permeability can be improved more.

Examples of a method for forming a colored pixel using the colored layer forming composition include a pixel forming method such as a conventionally known photolithography method.
For example, when the colored layer forming composition contains a negative ultraviolet curable resin, the colored layer forming composition is applied to the surface (region) to be coated by spin coating, and then exposed to ultraviolet rays through a photomask. It can be formed by performing (pattern exposure) and washing (developing) the unexposed portion with a solvent, an aqueous alkali solution such as an aqueous potassium hydroxide solution, or the like. Moreover, after apply | coating the composition for colored layer formation, you may heat-process (prebaking) before exposure, and you may heat-process after image development.

  Although the thickness of the said colored layer is not specifically limited, Usually, it is the range of 1-5 micrometers. The thickness of the colored layer can be appropriately controlled by adjusting the coating method of the colored layer forming composition, the solid content concentration, the viscosity, and the like of the colored layer forming composition.

  The arrangement pattern of the colored pixels of the colored layer is not particularly limited, and can be a general arrangement such as a stripe type, a mosaic type, a triangle type, a four-pixel arrangement type, and the width and area of the arrangement pattern. Etc. can be arbitrarily set.

(Transparent substrate)
The transparent substrate that can be used for the intermediate product is not particularly limited as long as it is a base material transparent to visible light, and a transparent substrate used for a general color filter can be used. Specific examples include inflexible transparent rigid materials such as quartz glass, alkali-free glass, and synthetic quartz plates, or transparent flexible materials having flexibility such as transparent resin films and optical resin plates. It is done.
Although the thickness of the said transparent substrate is not specifically limited, According to the use of the color filter of this invention, the thing of about 100 micrometers-1000 micrometers can be used, for example.

(Shading part)
The intermediate product may have a light shielding part. The light shielding portion is formed in a pattern on the transparent substrate, and is provided so as to surround the colored pixels and the outside of the pixel formation region in order to improve the contrast of the display image. As the light-shielding part, those used in conventionally known color filters can be employed.
The light shielding part may be a metal thin film such as chromium by sputtering, vacuum deposition, or the like. In addition, the light shielding part may be a resin layer in which light shielding particles such as carbon fine particles, metal oxides, inorganic pigments, and organic pigments are contained in a binder. When the light-shielding part is obtained by dispersing or dissolving light-shielding particles in a binder resin, the light-shielding part may be formed by any method that can pattern the light-shielding part. Examples thereof include a photolithography method, a printing method, an ink jet method and the like using the resin composition.

  When a printing method or an inkjet method is used as the method for forming the light shielding part, examples of the binder resin used for the light shielding part include polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polyvinyl alcohol resin, polyvinyl pyrrolidone resin, and hydroxyethyl cellulose. Examples thereof include resins, carboxymethyl cellulose resins, polyvinyl chloride resins, melamine resins, phenol resins, alkyd resins, epoxy resins, polyurethane resins, polyester resins, maleic acid resins, polyamide resins and the like.

  In addition, when a photolithography method is used as a method for forming the light-shielding portion, the binder resin may be, for example, ionizing radiation having a reactive vinyl group such as acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber. A curable resin is used. In this case, a photopolymerization initiator may be added to the light shielding part forming resin composition containing the light shielding particles and the ionizing radiation curable resin, and further, a sensitizer and a coating property improver as necessary. , Development improvers, crosslinking agents, polymerization inhibitors, plasticizers, flame retardants, and the like may be added.

  On the other hand, when the light shielding part is a metal thin film, the method for forming the light shielding part is not particularly limited as long as the light shielding part can be patterned. For example, a photolithography method or a mask is used. The vapor deposition method, the printing method, etc. can be mentioned.

  The thickness of the light shielding part is about 100 to 400 nm in the case of a metal thin film, and about 0.5 to 2.5 μm in the case of a resin layer containing light shielding particles.

[Transparent protective film]
The method for producing a color filter according to the present invention includes forming a transparent protective film by applying the above-described resin composition for forming a transparent protective film according to the present invention on the colored layer of the above-described color filter intermediate product. Features. The transparent protective film is provided to flatten the surface of the colored layer and to prevent the components contained in the colored layer from eluting into the liquid crystal layer.

As a method of applying the transparent protective film-forming resin composition on the colored layer of the intermediate product, the transparent protective film-forming resin composition is shielded from light by a method such as spin coater, roll coater, spraying, printing, etc. It can be formed by coating so as to cover the part and the colored layer, and curing by irradiation with ionizing radiation or heating.
When a negative ionizing radiation curable resin is used as the film forming resin contained in the resin composition for forming a transparent protective film, for example, a predetermined electrical property is applied on the applied resin composition for forming a transparent protective film. Place the photomask on which the pattern of the connection part is drawn and irradiate with ionizing radiation to cure the necessary part, and wash the uncured resin that was not irradiated with ionizing radiation with a solvent (development) By doing so, a transparent protective film can be formed only in a predetermined region.
When a thermosetting resin is used as the film-forming resin contained in the resin composition for forming a transparent protective film, the applied resin composition for forming a transparent protective film is, for example, 100 to 240 ° C., 5 to 90 A transparent protective film can be formed by performing the heat treatment under the condition of minutes.

  The thickness of the transparent protective film can be set in consideration of the light transmittance of the material used, the surface state of the color filter, and the like, and is not particularly limited, but is preferably 0.1 to 3.0 μm. In particular, the thickness is preferably 0.5 to 2.0 μm. The thickness of the transparent protective film means the distance in the direction perpendicular to the transparent substrate plane from the interface between the transparent protective film and the colored layer to the interface of the surface on the side where the colored layer of the transparent protective film does not exist. In the color filter 10 shown in (4), it means the distance shown by d.

  In addition, in the manufacturing method of the color filter which concerns on this invention, a transparent electrode, alignment film, a columnar spacer, etc. can be further formed by a conventionally well-known method as needed.

(Synthesis of copolymer resin solution (solid content 50%))
In a polymerization tank, 63 parts by mass of methyl methacrylate (MMA), 12 parts by mass of acrylic acid (AA), 6 parts by mass of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by mass of diethylene glycol dimethyl ether (DMDG) are charged. After stirring and dissolving, 7 parts by mass of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly. Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour. Further, 7 parts by mass of glycidyl methacrylate (GMA), 0.4 parts by mass of triethylamine, and 0.2 parts by mass of hydroquinone were added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution ( A solid content of 50%) was obtained.
<Composition of copolymer resin solution (solid content 50%)>
-Methyl methacrylate (MMA) (manufactured by Kuraray Co., Ltd.): 63 parts by mass-Acrylic acid (AA) (manufactured by Nippon Shokubai): 12 parts by mass-2-hydroxyethyl methacrylate (HEMA) (manufactured by Nippon Shokubai): 6 Parts by mass, diethylene glycol dimethyl ether (DMDG) (manufactured by Junsei Co., Ltd.): 88 parts by mass, 2,2′-azobis (2-methylbutyronitrile) (trade name: ABN-R, manufactured by Nippon Finechem Co., Ltd.): 7 Mass parts: Glycidyl methacrylate (GMA) (Nippon Yushi Co., Ltd.): 7 parts by mass Triethylamine (Wako Pure Chemical Industries): 0.4 parts by mass Hydroquinone (Seiko Chemical Co., Ltd.): 0.2 parts by mass

(Preparation of curable resin composition)
The following materials were stirred and mixed at room temperature to obtain a curable resin composition.
<Composition of curable resin composition>
-Copolymer resin solution (solid content 50%): 16 parts by mass-Dipentaerythritol pentaacrylate (trade name: SR399, manufactured by Sartomer): 24 parts by mass- Orthocresol novolac type epoxy resin (trade name: Epicoat 180S70, (Oilized Shell Epoxy Co., Ltd.): 4 parts by mass 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one (trade name: Irgacure 907, manufactured by Ciba Specialty Chemicals) : 4 parts by mass ・ Diethylene glycol dimethyl ether (manufactured by Junsei Co., Ltd.): 52 parts by mass

(Preparation of blue colored layer forming composition 1)
The following materials were mixed using a paint shaker (manufactured by Asada Steel Corporation, bead diameter: 0.3 mm) to obtain a composition 1 for forming a blue colored layer.
<Composition of blue colored layer forming composition 1>
Color material: C.I. I. Pigment Blue 1 (Indicated as PB1 in Table 1)
(Product name: FANAL BLUE D6340, manufactured by BASF, SP value 9.5): 4 parts by mass Dispersant: DISPERBYK111 (manufactured by Big Chemie Japan): 1.6 parts by mass The curable resin composition: 36.8 Mass part / Solvent: 3-methoxybutyl acetate (manufactured by Daicel Chemical Industries, Ltd.): 73.6 parts by mass

(Preparation of blue colored layer forming composition 2)
As a coloring material, C.I. I. The blue colored layer forming composition 1 except that 4 parts by mass of CI Pigment Blue 62 (manufactured by BASF, trade name: FANAL BLUE D6380, SP value 9.5) (shown as PB62 in Table 1) is used. In the same manner as above, a blue colored layer forming composition 2 was prepared.

(Preparation of blue colored layer forming composition 3)
Except for using 4 parts by mass of Basic Blue 7 (manufactured by Tokyo Chemical Industry, trade name: Victoria Pure Blue BO, SP value 9.5) (shown as BB7 in Table 1) as the color material, the blue color In the same manner as the colored layer forming composition 1, a blue colored layer forming composition 3 was prepared.

(Preparation of thermosetting transparent protective film-forming resin composition 1)
The following materials were stirred and mixed to obtain a thermosetting transparent protective film-forming resin composition 1.
<Composition of thermosetting transparent protective film-forming resin composition 1>
Trialkyltetrahydrophthalic anhydride (manufactured by Japan Epoxy Resin Co., Ltd., trade name: Epicure YH-306): 42.1 parts by mass methacryloyloxyethyl isocyanate-added benzyl methacrylate / acrylic acid / 2-hydroxyethyl methacrylate copolymer (new Nakamura Chemical Co., Ltd., trade name: NK polymer B-7500): 29.9 parts by mass. Epoxidized butanetetracarboxylic acid tetrakis- (3-cyclohexenyl) -added caprolactone (manufactured by Daicel Chemical Industries, trade name: Epolide GT401): 20.1 parts by mass-methacryloyloxyethyl isocyanate-added benzyl methacrylate / styrene / acrylic acid / 2-hydroxyethyl methacrylate copolymer (manufactured by Shin-Nakamura Chemical Co., Ltd., trade name: NK polymer T-9): 19.1 parts by mass Zippe Intererythritol hexaacrylate (manufactured by Sartomer, trade name: Sartomer SR399E): 5.7 parts by mass Solvent (propylene glycol monomethyl ether acetate (SP value 8.7): 60% by mass of cyclohexanone (SP value 9.8): 40% by mass): 283 parts by mass

(Preparation of thermosetting transparent protective film-forming resin composition 2)
A thermosetting transparent protective film was formed except that propylene glycol monomethyl ether acetate (SP value 8.7): cyclohexanone (SP value 9.8) was used in a composition of 70% by mass to 30% by mass as the solvent. The resin composition 2 for thermosetting type transparent protective film formation was prepared like the resin composition 1 for resin.

(Preparation of thermosetting transparent protective film-forming resin composition 3)
A thermosetting transparent protective film was formed except that propylene glycol monomethyl ether acetate (SP value 8.7): cyclohexanone (SP value 9.8) was used in a composition of 50% by mass: 50% by mass as the solvent. In the same manner as for resin composition 1, a thermosetting transparent protective film-forming resin composition 3 was prepared.

(Preparation of thermosetting transparent protective film-forming resin composition 4)
The composition of propylene glycol monomethyl ether acetate (SP value 8.7): diethylene glycol ethyl methyl ether (SP value 8.2): cyclohexanone (SP value 9.8) as a solvent is 30% by mass: 30% by mass: 40% by mass. A thermosetting transparent protective film-forming resin composition 4 was prepared in the same manner as the thermosetting transparent protective film-forming resin composition 1 except that the above was used.

(Preparation of thermosetting transparent protective film-forming resin composition 5)
The composition of propylene glycol monomethyl ether acetate (SP value 8.7): diethylene glycol ethyl methyl ether (SP value 8.2): cyclohexanone (SP value 9.8) as a solvent is 35% by mass: 35% by mass: 30% by mass. A thermosetting transparent protective film-forming resin composition 5 was prepared in the same manner as the thermosetting transparent protective film-forming resin composition 1 except that the above were used.

(Preparation of thermosetting transparent protective film-forming resin composition 6)
The composition of propylene glycol monomethyl ether acetate (SP value 8.7): diethylene glycol ethyl methyl ether (SP value 8.2): cyclohexanone (SP value 9.8) as a solvent is 25% by mass: 25% by mass: 50% by mass. A thermosetting transparent protective film-forming resin composition 6 was prepared in the same manner as the thermosetting transparent protective film-forming resin composition 1 except that the above was used.

(Preparation of thermosetting transparent protective film-forming resin composition 7)
For the formation of a thermosetting transparent protective film, except that propylene glycol monomethyl ether (SP value 10.2): cyclohexanone (SP value 9.8) was used in a composition of 60% by mass: 40% by mass as the solvent. In the same manner as the resin composition 1, a thermosetting transparent protective film-forming resin composition 7 was prepared.

(Preparation of resin composition 1 for forming UV curable transparent protective film)
The following materials were stirred and mixed to obtain a resin composition 1 for forming a UV curable transparent protective film.
-Methyl methacrylate-styrene-acrylic acid copolymer: 32 parts by mass-Epicoat 180S70 (manufactured by Japan Epoxy Resin Co., Ltd.): 18 parts by mass-Dipentaerythritol pentaacrylate: 42 parts by mass-Initiator (Ciba Specialty Chemicals) Irgacure 907): 8 parts by mass / solvent (cyclohexanol acetate (SP value 8.8): cyclohexanone (SP value 9.8) is 60% by mass: 40% by mass): 300 parts by mass

(Preparation of UV-curable transparent protective film-forming resin composition 2)
The resin for forming a UV curable transparent protective film, except that a solvent having a composition of 70% by mass: 30% by mass of cyclohexanol acetate (SP value 8.8): cyclohexanone (SP value 9.8) was used as the solvent. In the same manner as Composition 1, a UV curable transparent protective film-forming resin composition 2 was prepared.

(Preparation of resin composition 3 for forming UV curable transparent protective film)
The resin for forming a UV curable transparent protective film, except that a solvent having a composition of 50% by mass: 50% by mass of cyclohexanol acetate (SP value 8.8): cyclohexanone (SP value 9.8) was used as the solvent. In the same manner as in Composition 1, a UV curable transparent protective film-forming resin composition 3 was prepared.

(Preparation of UV-curable transparent protective film-forming resin composition 4)
As a solvent, cyclohexanol acetate (SP value 8.8): propylene glycol monomethyl ether acetate (SP value 8.7): cyclohexanone (SP value 9.8) has a composition of 30% by mass: 30% by mass: 40% by mass. A UV curable transparent protective film-forming resin composition 4 was prepared in the same manner as in the UV curable transparent protective film-forming resin composition 1 except that those were used.

(Preparation of resin composition 5 for forming UV curable transparent protective film)
As a solvent, cyclohexanol acetate (SP value 8.8): propylene glycol monomethyl ether acetate (SP value 8.7): cyclohexanone (SP value 9.8) had a composition of 35% by mass: 35% by mass: 30% by mass. A UV curable transparent protective film-forming resin composition 5 was prepared in the same manner as in the UV curable transparent protective film-forming resin composition 1 except that a resin was used.

(Preparation of UV-curable transparent protective film-forming resin composition 6)
As a solvent, cyclohexanol acetate (SP value 8.8): propylene glycol monomethyl ether acetate (SP value 8.7): cyclohexanone (SP value 9.8) had a composition of 25% by mass: 25% by mass: 50% by mass. A UV curable transparent protective film-forming resin composition 6 was prepared in the same manner as in the UV curable transparent protective film-forming resin composition 1 except that one was used.

(Preparation of UV-curable transparent protective film-forming resin composition 7)
For the formation of a UV curable transparent protective film, except that propylene glycol monomethyl ether (SP value 10.2): cyclohexanone (SP value 9.8) was used in a composition of 60% by mass: 40% by mass as the solvent. In the same manner as in the resin composition 1, a UV curable transparent protective film-forming resin composition 7 was prepared.

Example 1
A blue colored layer forming composition 1 was applied to a 0.7 mm glass substrate (AN material manufactured by Asahi Glass Co., Ltd.) using a spin coater, and then pre-baked at 80 ° C. for 3 minutes to dry the coating film. Next, the dried coating film was exposed and developed at 200 mJ / cm ² using a high-pressure mercury lamp through a photomask for a blue colored layer, and then post-baked at 200 ° C. for 20 minutes to form a blue colored layer. As a plan view shape of the blue colored layer, blue stripe lines having a width of 145 μm are repeatedly formed at intervals of 290 μm.
Next, the thermosetting transparent protective film-forming resin composition 1 was applied on the glass substrate by a spin coating method so as to cover the blue colored layer, prebaked at 80 ° C. for 3 minutes, and the coating film was dried. Thereafter, it was post-baked at 200 ° C. for 20 minutes to produce a blue color filter.

(Example 2)
A color filter was produced in the same manner as in Example 1 except that the blue colored layer forming composition 2 (color material PB62) was used instead of the blue colored layer forming composition 1 (color material PB1).

(Example 3)
A color filter was produced in the same manner as in Example 1 except that the blue colored layer forming composition 3 (coloring material BB7) was used instead of the blue colored layer forming composition 1 (coloring material PB1).

Example 4
A color filter was produced in the same manner as in Example 3 except that the thermosetting transparent protective film-forming resin composition 2 was used instead of the thermosetting transparent protective film-forming resin composition 1.

(Comparative Example 1)
A color filter was produced in the same manner as in Example 1 except that the thermosetting transparent protective film-forming resin composition 3 was used instead of the thermosetting transparent protective film-forming resin composition 1.

(Comparative Example 2)
A color filter was produced in the same manner as in Example 2 except that the thermosetting transparent protective film-forming resin composition 3 was used instead of the thermosetting transparent protective film-forming resin composition 1.

(Comparative Example 3)
A color filter was produced in the same manner as in Example 3 except that the thermosetting transparent protective film-forming resin composition 3 was used instead of the thermosetting transparent protective film-forming resin composition 1.

(Example 5)
A color filter was produced in the same manner as in Example 3 except that the thermosetting transparent protective film-forming resin composition 4 was used instead of the thermosetting transparent protective film-forming resin composition 1.

(Example 6)
A color filter was produced in the same manner as in Example 3 except that the thermosetting transparent protective film-forming resin composition 5 was used instead of the thermosetting transparent protective film-forming resin composition 1.

(Comparative Example 4)
A color filter was produced in the same manner as in Example 3 except that the thermosetting transparent protective film-forming resin composition 6 was used instead of the thermosetting transparent protective film-forming resin composition 1.

(Example 7)
A color filter was produced in the same manner as in Example 3 except that the thermosetting transparent protective film-forming resin composition 7 was used instead of the thermosetting transparent protective film-forming resin composition 1.

(Example 8)
A blue colored layer forming composition 3 was applied to a 0.7 mm glass substrate (AN material manufactured by Asahi Glass Co., Ltd.) using a spin coater, and then prebaked at 80 ° C. for 3 minutes to dry the coating film. Next, the dried coating film was exposed and developed at 200 mJ / cm ² using a high-pressure mercury lamp through a photomask for a blue colored layer, and then post-baked at 200 ° C. for 20 minutes to form a blue colored layer. As a plan view shape of the blue colored layer, blue stripe lines having a width of 145 μm are repeatedly formed at intervals of 290 μm.
Next, the UV curable transparent protective film-forming resin composition 1 was applied onto the glass substrate by a spin coating method so as to cover the blue colored layer, prebaked at 80 ° C. for 3 minutes, and the coating film was dried. Next, the dried coating film was exposed and developed at 200 mJ / cm ² using a high-pressure mercury lamp through a photomask for a transparent protective film, and then post-baked at 200 ° C. for 20 minutes to produce a blue color filter.

Example 9
A color filter was produced in the same manner as in Example 8, except that the UV curable transparent protective film-forming resin composition 2 was used instead of the UV curable transparent protective film-forming resin composition 1.

(Comparative Example 5)
A color filter was produced in the same manner as in Example 8, except that the UV curable transparent protective film-forming resin composition 3 was used instead of the UV curable transparent protective film-forming resin composition 1.

(Example 10)
A color filter was produced in the same manner as in Example 8, except that the UV curable transparent protective film-forming resin composition 4 was used instead of the UV curable transparent protective film-forming resin composition 1.

(Example 11)
A color filter was produced in the same manner as in Example 8, except that the UV curable transparent protective film-forming resin composition 5 was used instead of the UV curable transparent protective film-forming resin composition 1.

(Comparative Example 6)
A color filter was produced in the same manner as in Example 8, except that the UV curable transparent protective film-forming resin composition 6 was used instead of the UV curable transparent protective film-forming resin composition 1.

(Example 12)
A color filter was produced in the same manner as in Example 8 except that the UV curable transparent protective film-forming resin composition 7 was used instead of the UV curable transparent protective film-forming resin composition 1.

<Chromaticity measurement>
In the color filter produced in each example and each comparative example, a place where only a transparent protective film separated from the blue stripe line end by 145 μm in the normal direction of the stripe line is formed by a microspectroscope OSP-SP2000 (manufactured by OLYMPUS). Was used to measure chromaticity with a C light source. The measurement results are shown in Table 1.

<Presence or absence of color material elution>
In the color filters prepared in each Example and each Comparative Example, the presence or absence of elution of the color material from the pattern portion of the blue colored layer to the transparent protective film was visually confirmed and evaluated according to the following criteria.
○ Elution is not visually confirmed.
× Elution is confirmed visually.

<Judgment>
Judgment was made according to the following criteria from the results of the above chromaticity measurement and the presence or absence of color material elution.
○ The luminance is 95% or more and no elution is confirmed visually.
X Luminance is less than 95%, or elution is confirmed visually.

DESCRIPTION OF SYMBOLS 1 Transparent substrate 2 Colored layer 2R Red pixel 2G Green pixel 2B Blue pixel 3 Light-shielding part 4 Transparent protective film 5 Color filter intermediate product 10 Color filter

Claims (3)

On the colored layer of the color filter intermediate product provided with a colored layer having a colored pixel containing a dye-based color material selected from the group consisting of a dye and a lake pigment,
It contains a film-forming resin and a solvent, and the solvent contains 60% by mass of the solvent a having an absolute value of SP value greater than 0.5 with respect to the dye-based color material contained in the colored pixel with respect to the whole solvent. A method for producing a color filter, comprising forming a transparent protective film by applying a resin composition for forming a transparent protective film contained in the above ratio.   The solvent a having an SP value difference of more than 0.5 with respect to the dye-based colorant is selected from propylene glycol monomethyl ether acetate, cyclohexanol acetate, propylene glycol monomethyl ether, diethylene glycol ethyl methyl ether, and dipropylene glycol dimethyl ether. The method for producing a color filter according to claim 1, which is selected from the group consisting of: A resin composition for forming a transparent protective film covering the colored layer of a color filter having a colored layer having a colored pixel containing a dye-based color material selected from the group consisting of a dye and a lake pigment,
It contains a film-forming resin and a solvent, and the solvent contains 60% by mass of the solvent a having an absolute value of SP value greater than 0.5 with respect to the dye-based color material contained in the colored pixel with respect to the whole solvent. A transparent protective film-forming resin composition for use in a method for producing a color filter, characterized by comprising the above-mentioned ratio.

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