JP2010243604A - Thermosetting resin composition for color filter, color filter and method for manufacturing the same, and liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermosetting resin composition for a color filter that forms a colored layer with high flatness even by an ink jet system and improves optical performance. <P>SOLUTION: The thermosetting resin composition for a color filter has (A) a pigment dispersant, (B) a pigment, (C) a thermosetting binder, and (D) a solvent. The pigment dispersant (A) is a graft copolymer of a nitrogen-containing monomer represented by general formula (I) and a polymerizable oligomer comprising a polymer chain including a constituent unit represented by general formula (II) and a group having an ethylenically unsaturated double bond at an end thereof. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a thermosetting resin composition for a color filter, a color filter, a method for producing the same, and a liquid crystal display device.

  In recent years, with the development of personal computers, particularly portable personal computers, the demand for liquid crystal displays has increased. In recent years, the penetration rate of home-use liquid crystal televisions has been increasing, and the market for liquid crystal displays is expanding. Furthermore, liquid crystal displays that have become widespread in recent years tend to have larger screens, and this tendency is particularly strong for home-use liquid crystal televisions. In such a situation, it is desired to manufacture a liquid crystal display that has a lower cost and a higher quality with high productivity. In particular, in a color filter having a function of colorizing the liquid crystal display. However, such demands are increasing because of its high cost.

  Here, as a general method for producing a color filter, a coating film made of a photocurable negative resin composition in which a pigment of each color is dispersed is formed on a substrate on which a light shielding portion is formed in a pattern, A method is used in which a colored layer of each color is formed into a pattern by exposure and alkali development through a photomask having a desired pattern shape.

However, in the above method, in order to color three colors of R, G, and B, it is necessary to repeat the same process three times, which increases the cost, and the yield decreases because the same process is repeated. There is a problem of doing.
As a method of manufacturing a color filter that solves these problems, a method of forming pixels by spraying ink on a substrate surface by an ink jet method has been proposed.

When pixels are formed by the inkjet method in the area surrounded by the black matrix layer on the transparent substrate, the relationship between the affinity between the ink and the surface of the black matrix layer, the height of the black matrix layer, the amount of ink to be ejected, etc. Thus, the shape of the pixel in the opening surrounded by the black matrix layer has a thin portion at the outer edge of the pixel or in the vicinity thereof, and the film is located closer to the center of the pixel than the thin portion. The shape is such that it has the thickest part, or conversely, it has a thick part at or near the outer edge of the pixel and the film is closer to the center of the pixel than the thick part. It tends to be a non-uniform pixel, such as a shape having the thinnest part, or a surface having an uneven shape.

  As an attempt to flatten a pixel, Patent Document 1 discloses a contact angle and a viscosity with respect to a partition wall of inkjet ink. Patent Document 2 discloses a method for producing a color filter in which a heating temperature and a heating time at the time of forming a colored layer are specified after discharging a colored composition using an inkjet method. Patent Document 3 discloses a method for manufacturing a color filter that specifies the melt index of a thermosetting resin contained in an inkjet ink. Further, in Patent Document 4, the viscosity and T.I. I (thixotropic index; ratio of shear rate 10 (1 / s) viscosity to shear rate 1000 (1 / s)) is specified.

JP 2008-33125 A JP 2008-76828 A JP 2008-15270 A JP 2007-327046 A

Since the colored layer formed by the inkjet method tends to have a non-uniform shape, it is formed by a flat colored layer having the same average film thickness and the same material composition ratio as the colored layer, for example, by spin coating. There is a problem that luminance and contrast tend to be lower than those of the colored layer. Therefore, when the difference between the thickest portion (T) and the thinnest portion (B) in the film thickness of the colored layer formed by the ink jet method is taken as the TB difference, the TB difference can be reduced. It has been demanded. Conventionally, flattening has been attempted by adjusting the thermosetting resin in the inkjet ink or by adding an additive, but there is a limit to adjusting the flattening with only the thermosetting resin, Since the amount of the additive that can be added is limited, it was insufficient to exert the planarization effect.
In recent years, there has been an increasing demand for high contrast in liquid crystal display devices, and in order to achieve such a demand, finer pigments are required. However, in the technique disclosed in the above patent document, the pigment dispersibility with respect to the miniaturized pigment is insufficient, and the effect of improving the contrast of the colored layer is insufficient.

  The present invention has been accomplished in view of the above-described circumstances, and can be formed with a highly flat colored layer by an ink jet method, and the thermosetting resin composition for a color filter capable of improving optical performance, and the thermosetting. The main object of the present invention is to provide a color filter formed by using a conductive resin composition, a method for producing the same, and a liquid crystal display device having the color filter.

As a result of intensive studies to achieve the above object, the present inventors have paid attention to a pigment dispersant that is used as an essential component in a predetermined amount in order to disperse the pigment satisfactorily. By using an organic phosphate and / or an organic sulfonate of a graft copolymer having a high color flatness, it is possible to form a colored layer with high flatness and excellent optical performance. It has been found that a thermosetting resin composition is obtained and can be adapted to its purpose.
The present invention has been completed based on such findings.

  The present invention is a thermosetting resin composition for a color filter comprising (A) a pigment dispersant, (B) a pigment, (C) a thermosetting binder, and (D) a solvent, ) The pigment dispersant has a polymer chain containing a nitrogen-containing monomer represented by the following general formula (I) and a structural unit represented by the following general formula (II), and an ethylenically unsaturated double bond at the terminal thereof. A polymerizable oligomer comprising a group as a copolymerization component, and the polymerizable oligomer is a graft copolymer contained in an amount of 50 to 95% by weight in the total copolymerization component, and further the amino group contained in the nitrogen-containing monomer and the following: Provided is a thermosetting resin composition for a color filter, wherein the organic acid compound represented by the general formula (III) and / or the following general formula (IV) is a graft copolymer in which a salt is formed. .

［式（Ｉ）〜（ＩＶ）中、Ｒ^１は水素原子又はメチル基、Ｒ^２及びＲ^２’は、それぞれ独立に水素原子又は炭素数１〜８のアルキル基、Ａは、それぞれ独立に炭素数１〜８のアルキレン基、−［ＣＨ（Ｒ^６）−ＣＨ（Ｒ^７）−Ｏ］_ｘ−ＣＨ（Ｒ^６）−ＣＨ（Ｒ^７）−又は−［（ＣＨ_２）_ｙ−Ｏ］_ｚ−（ＣＨ_２）_ｙ−で示される２価の基である。
Ｒ^３及びＲ^３’は、それぞれ独立に水素原子、水酸基、炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−［ＣＨ（Ｒ^９）−ＣＨ（Ｒ^１０）−Ｏ］_ａ−Ｒ^８、−［（ＣＨ_２）_ｂ−Ｏ］_ｃ−Ｒ^８、又は−Ｏ−Ｒ^３’’で示される１価の基であり、Ｒ^３及びＲ^３’のいずれかは炭素原子を含む。Ｒ^３’’は、炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−［ＣＨ（Ｒ^９）−ＣＨ（Ｒ^１０）−Ｏ］_ａ−Ｒ^８、又は−［（ＣＨ_２）_ｂ−Ｏ］_ｃ−Ｒ^８で示される１価の基である。
Ｒ^４は、炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−［ＣＨ（Ｒ^９）−ＣＨ（Ｒ^１０）−Ｏ］_ａ−Ｒ^８、−［（ＣＨ_２）_ｂ−Ｏ］_ｃ−Ｒ^８、又は−Ｏ−Ｒ^４’で示される１価の基である。Ｒ^４’は、炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−［ＣＨ（Ｒ^９）−ＣＨ（Ｒ^１０）−Ｏ］_ａ−Ｒ^８、−［（ＣＨ_２）_ｂ−Ｏ］_ｃ−Ｒ^８で示される１価の基である。
Ｒ^６、Ｒ^７、Ｒ^９及びＲ^１０は、それぞれ独立に水素原子又はメチル基であり、Ｒ^８は、水素原子、あるいは炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−ＣＨＯ、−ＣＨ_２ＣＨＯ、−ＣＯ−ＣＨ＝ＣＨ_２、−ＣＯ−Ｃ（ＣＨ_３）＝ＣＨ_２又は−ＣＨ_２ＣＯＯＲ^１１で示される１価の基であり、Ｒ^１１は水素原子又は炭素数１〜５のアルキル基である。
Ｒ^３、Ｒ^３’、Ｒ^３’’、Ｒ^４、Ｒ^４’及びＲ^８において、アルキル基、アルケニル基、アラルキル基、アリール基はそれぞれ、置換基を有していても良い。
ｌは１〜５の整数、ｍは５以上の整数を示す。
ｘ及びａは１〜１８の整数、ｙ及びｂは１〜５の整数、ｚ及びｃは１〜１８の整数を示す。］

[In the formulas (I) to (IV), R ¹ is a hydrogen atom or a methyl group, R ² and R ^{2 ′} are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and A is each independently a carbon atom. An alkylene group of 1 to 8, — [CH (R ⁶ ) —CH (R ⁷ ) —O] _x —CH (R ⁶ ) —CH (R ⁷ ) — or — [(CH ₂ ) _y —O] _z It is a divalent group represented by — (CH ₂ ) _y —.
R ³ and R ^{3 ′} are each independently a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH ( R ¹⁰ ) —O] _a —R ⁸ , — [(CH ₂ ) _b —O] _c —R ⁸ , or a monovalent group represented by —O—R ^{3 ″} , R ³ and R ^{3 ′} Any of which contains a carbon atom. R ^{3 ''} is an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl ^{group, - [CH (R 9)} -CH (R 10) -O] a -R 8 Or a monovalent group represented by — [(CH ₂ ) _b —O] _c —R ⁸ .
R ⁴ is an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl ^{group, - [CH (R 9)} -CH (R 10) -O] a -R 8, - [(CH ₂ ) _b —O] _c —R ⁸ or a monovalent group represented by —O—R ^{4 ′} . R ^{4 ′} is an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ⁸ , — [(CH ₂ ) _b —O] _c is a monovalent group represented by R ⁸ .
R ⁶ , R ⁷ , R ⁹ and R ¹⁰ are each independently a hydrogen atom or a methyl group, R ⁸ is a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, An aralkyl group, an aryl group, —CHO, —CH ₂ CHO, —CO—CH═CH ₂ , —CO—C (CH ₃ ) ═CH _2, or a monovalent group represented by —CH ₂ COOR ¹¹ , R ¹¹ is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
In R ³ , R ^{3 ′} , R ^{3 ″} , R ⁴ , R ^{4 ′} and R ⁸ , each of the alkyl group, alkenyl group, aralkyl group and aryl group may have a substituent.
l represents an integer of 1 to 5, and m represents an integer of 5 or more.
x and a are integers of 1 to 18, y and b are integers of 1 to 5, and z and c are integers of 1 to 18. ]

  In the thermosetting resin composition for a color filter according to the present invention, the group having the ethylenically unsaturated double bond of the polymerizable oligomer may be a (meth) acryloyl group, a vinyl group, or an allyl group. preferable.

In the thermosetting resin composition for color filters according to the present invention, R ³ , R ^{3 ′} and / or R ^{3 ″} in the general formula (III) and / or R ⁴ in the general formula (IV). And / or R ^{4 ′} each independently represents a methyl group, an ethyl group, an aralkyl group, an aryl group, a vinyl group, an allyl group, or — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ^8. Or-[(CH ₂ ) _b —O] _c —R ⁸ and R ⁸ is —CO—CH═CH ₂ or —CO—C (CH ₃ ) ═CH ₂ . From the point of view, it is preferable.

  In the thermosetting resin composition according to the present invention, the average particle size of the (B) pigment is preferably 10 to 100 nm from the viewpoint of producing a high-contrast and high-quality liquid crystal display device.

The present invention is a color filter comprising at least a transparent substrate and a colored layer provided on the transparent substrate, wherein at least one of the colored layers uses the thermosetting resin composition for a color filter of the present invention. There is provided a color filter having a colored layer formed.
The present invention also includes a step of selectively depositing the thermosetting resin composition for a color filter of the present invention by an inkjet method to form an ink layer;
And a step of forming a colored layer by curing the ink layer.
Furthermore, the present invention provides a liquid crystal display device having the above color filter.

ADVANTAGE OF THE INVENTION According to this invention, the thermosetting resin composition for color filters which has favorable pigment dispersibility, can form a colored layer with high flatness also by an inkjet system, and can improve optical performance can be provided. By using the thermosetting resin composition excellent in pigment dispersibility of the present invention, it is possible to realize a pixel portion of a color filter with high brightness and high contrast.
Moreover, according to this invention, it can be set as the color filter which was excellent in productivity and improved optical performance by forming a colored layer using the said thermosetting resin composition for color filters.
Furthermore, according to the present invention, a liquid crystal display device with high quality and excellent productivity can be provided by using the color filter.

It is the schematic which shows an example of the color filter of this invention. It is the schematic which shows an example of the liquid crystal display device of this invention. It is a schematic diagram which shows an example of the preferable structure of the graft copolymer used for this invention.

[Thermosetting resin composition for color filter]
The thermosetting resin composition for a color filter of the present invention includes (A) a pigment dispersant, (B) a pigment, (C) a thermosetting binder, and (D) a solvent, and the (A) pigment. The dispersant has the following properties.
Hereinafter, the constituent components will be described in order.

((A) Pigment dispersant)
In the thermosetting resin composition for color filters of the present invention, the pigment dispersant used as the component (A) is represented by the nitrogen-containing monomer represented by the following general formula (I) and the following general formula (II). And a polymerizable oligomer comprising a group having an ethylenically unsaturated double bond at its terminal as a copolymerization component, and the polymerizable oligomer is 50 to 95% by weight in the total copolymerization component The graft copolymer contained, and further the amino group of the nitrogen-containing monomer and the organic phosphoric acid compound represented by the following general formula (III) and / or the organic sulfonic acid compound represented by the following general formula (IV) Is a graft copolymer in which a salt is formed (hereinafter sometimes referred to as a salt-type graft copolymer).

［式（Ｉ）〜（ＩＶ）中、Ｒ^１は水素原子又はメチル基、Ｒ^２及びＲ^２’は、それぞれ独立に水素原子又は炭素数１〜８のアルキル基、Ａは、それぞれ独立に炭素数１〜８のアルキレン基、−［ＣＨ（Ｒ^６）−ＣＨ（Ｒ^７）−Ｏ］_ｘ−ＣＨ（Ｒ^６）−ＣＨ（Ｒ^７）−又は−［（ＣＨ_２）_ｙ−Ｏ］_ｚ−（ＣＨ_２）_ｙ−で示される２価の基である。
Ｒ^３及びＲ^３’は、それぞれ独立に水素原子、水酸基、炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−［ＣＨ（Ｒ^９）−ＣＨ（Ｒ^１０）−Ｏ］_ａ−Ｒ^８、−［（ＣＨ_２）_ｂ−Ｏ］_ｃ−Ｒ^８、又は−Ｏ−Ｒ^３’’で示される１価の基であり、Ｒ^３及びＲ^３’のいずれかは炭素原子を含む。Ｒ^３’’は、炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−［ＣＨ（Ｒ^９）−ＣＨ（Ｒ^１０）−Ｏ］_ａ−Ｒ^８、又は−［（ＣＨ_２）_ｂ−Ｏ］_ｃ−Ｒ^８で示される１価の基である。
Ｒ^４は、炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−［ＣＨ（Ｒ^９）−ＣＨ（Ｒ^１０）−Ｏ］_ａ−Ｒ^８、−［（ＣＨ_２）_ｂ−Ｏ］_ｃ−Ｒ^８、又は−Ｏ−Ｒ^４’で示される１価の基である。Ｒ^４’は、炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−［ＣＨ（Ｒ^９）−ＣＨ（Ｒ^１０）−Ｏ］_ａ−Ｒ^８、−［（ＣＨ_２）_ｂ−Ｏ］_ｃ−Ｒ^８で示される１価の基である。
Ｒ^６、Ｒ^７、Ｒ^９及びＲ^１０は、それぞれ独立に水素原子又はメチル基であり、Ｒ^８は、水素原子、あるいは炭素数１〜１８のアルキル基、炭素数２〜１８のアルケニル基、アラルキル基、アリール基、−ＣＨＯ、−ＣＨ_２ＣＨＯ、−ＣＯ−ＣＨ＝ＣＨ_２、−ＣＯ−Ｃ（ＣＨ_３）＝ＣＨ_２又は−ＣＨ_２ＣＯＯＲ^１１で示される１価の基であり、Ｒ^１１は水素原子又は炭素数１〜５のアルキル基である。
Ｒ^３、Ｒ^３’、Ｒ^３’’、Ｒ^４、Ｒ^４’及びＲ^８において、アルキル基、アルケニル基、アラルキル基、アリール基はそれぞれ、置換基を有していても良い。
ｌは１〜５の整数、ｍは５以上の整数を示す。
ｘ及びａは１〜１８の整数、ｙ及びｂは１〜５の整数、ｚ及びｃは１〜１８の整数を示す。］

[In the formulas (I) to (IV), R ¹ is a hydrogen atom or a methyl group, R ² and R ^{2 ′} are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and A is each independently a carbon atom. An alkylene group of 1 to 8, — [CH (R ⁶ ) —CH (R ⁷ ) —O] _x —CH (R ⁶ ) —CH (R ⁷ ) — or — [(CH ₂ ) _y —O] _z It is a divalent group represented by — (CH ₂ ) _y —.
R ³ and R ^{3 ′} are each independently a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH ( R ¹⁰ ) —O] _a —R ⁸ , — [(CH ₂ ) _b —O] _c —R ⁸ , or a monovalent group represented by —O—R ^{3 ″} , R ³ and R ^{3 ′} Any of which contains a carbon atom. R ^{3 ″} represents an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ^8. Or a monovalent group represented by — [(CH ₂ ) _b —O] _c —R ⁸ .
R ⁴ represents an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ⁸ , — [(CH ₂ ) _b —O] _c —R ⁸ or a monovalent group represented by —O—R ^{4 ′} . R ^{4 'is} an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl ^{group, - [CH (R 9)} -CH (R 10) -O] a -R 8, — [(CH ₂ ) _b —O] _c is a monovalent group represented by R ⁸ .
R ^{6, R} 7, ^{R 9} and ^{R 10} are each independently a hydrogen atom or a methyl group, ^{R 8} is a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, An aralkyl group, an aryl group, —CHO, —CH ₂ CHO, —CO—CH═CH ₂ , —CO—C (CH ₃ ) ═CH _2, or a monovalent group represented by —CH ₂ COOR ¹¹ , R ¹¹ is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
In R ³ , R ^{3 ′} , R ^{3 ″} , R ⁴ , R ^{4 ′} and R ⁸ , each of the alkyl group, alkenyl group, aralkyl group and aryl group may have a substituent.
l represents an integer of 1 to 5, and m represents an integer of 5 or more.
x and a are integers of 1 to 18, y and b are integers of 1 to 5, and z and c are integers of 1 to 18. ]

  According to the present invention, the pigment dispersant used is a polymer chain containing a nitrogen-containing monomer represented by the above general formula (I), a structural unit represented by the above general formula (II), and an ethylenic group at its terminal. A graft copolymer containing a polymerizable oligomer comprising a group having an unsaturated double bond as a copolymerization component, and further an amino group of the nitrogen-containing monomer and an organic phosphorus represented by the following general formula (III) (B) of the nitrogen-containing portion forming a salt-forming site by being a salt-type graft copolymer in which a salt is formed with an acid compound and / or an organic sulfonic acid compound represented by the following general formula (IV) It has strong adhesion to the pigment, while the grafted polymer chain is soluble in (D) solvent. When the pigment dispersant is used, the dispersibility and dispersion stability of the pigment (B) in the solvent (D) can be improved.

  In addition, for the polymer chain of the polymerizable oligomer that is a copolymerization component of the graft copolymer, a polymer chain including a structural unit represented by the following general formula (II) is selected, and the graft chain is a graft copolymer. It contains so that it may become a specific amount. Thereby, the thermosetting resin composition of this invention can form a colored layer with high flatness also by an inkjet system. For example, in a colored layer having an average film thickness of about 1.5 μm to 2.5 μm and formed by an inkjet method with a thickness sufficient to be used as a pixel, the film thickness (T) of the thickest part and the thinnest part When the difference in film thickness (B) is a TB difference, the thickness of the thinnest part (B) can be increased, so that the TB difference can be reduced. Become.

<Graft copolymer>
The graft copolymer has a nitrogen-containing monomer represented by the above general formula (I), a polymer chain containing the structural unit represented by the above general formula (II), and an ethylenically unsaturated double bond at the terminal thereof. A polymerizable oligomer comprising a group is contained as a copolymer component, and the polymerizable oligomer is contained in an amount of 50 to 95% by weight in all copolymer components.
In the general formula (I), R ¹ represents a hydrogen atom or a methyl group, and R ² and R ^{2 ′} each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Here, the alkyl group having 1 to 8 carbon atoms may be linear, branched or cyclic. Examples of such alkyl groups include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, various pentyl groups, various hexyl groups, and various octyl groups. Group, cyclopentyl group, cyclohexyl group, cyclooctyl group and the like. Among these, a methyl group and an ethyl group are preferable.
In the present invention, R ² and R ^{2 ′} may be the same or different.

Each A is independently an alkylene group having 1 to 8 carbon atoms, — [CH (R ⁶ ) —CH (R ⁷ ) —O] _x —CH (R ⁶ ) —CH (R ⁷ ) —, or — [ (CH ₂ ) _y —O] _z — (CH ₂ ) _y — represents a divalent group. Here, the alkylene group having 1 to 8 carbon atoms may be linear or branched, for example, methylene group, ethylene group, trimethylene group, propylene group, various butylene groups, various pentylene groups, various kinds. A hexylene group, various octylene groups, and the like.
R ⁶ and R ⁷ are each independently a hydrogen atom or a methyl group.
x is an integer of 1 to 18, preferably an integer of 1 to 4, more preferably an integer of 1 to 2, and y is an integer of 1 to 5, preferably an integer of 1 to 4, more preferably 2 or 3. is there. z is an integer of 1-18, preferably an integer of 1-4, more preferably an integer of 1-2. In the present invention, when x, y, and z are in the above ranges, the thermosetting resin composition for a color filter of the present invention has excellent pigment dispersibility.
As this A, a C1-C8 alkylene group is preferable, and a methylene group and ethylene group are more preferable. If the carbon number is in the range of 1 to 8, the dispersibility of the pigment can be kept good.

The polymerizable oligomer used in the present invention comprises a polymer chain and a group having an ethylenically unsaturated double bond at the terminal. The group having an ethylenically unsaturated double bond is preferably contained only at one end of the polymer chain (hereinafter sometimes referred to as “one end”). In addition, the polymerizable oligomer may be substituted with a substituent as long as the dispersion performance of the graft copolymer is not hindered. Examples of the substituent include a halogen atom.
Preferred examples of the group having an ethylenically unsaturated double bond include a (meth) acryloyl group, a vinyl group, and an allyl group. Among them, a (meth) acryloyl group and a vinyl group are preferable, and a (meth) acryloyl group is particularly preferable. preferable.

  The polymer chain of the polymerizable oligomer has at least one structural unit represented by the following general formula (II).

（式（ＩＩ）において、ｌは１〜５の整数、ｍは５以上の整数を示す。）

(In formula (II), l represents an integer of 1 to 5, and m represents an integer of 5 or more.)

l is an integer of 1 to 5, preferably an integer of 2 to 5, more preferably an integer of 4 or 5. Moreover, the unit number m of the structural unit of a polymerizable oligomer should just be an integer greater than or equal to 5 from the point which improves the flatness of a colored layer, and is not specifically limited. Further, from the viewpoint of improving pigment dispersibility, m is preferably in the range of 8 to 200, more preferably in the range of 8 to 100, and still more preferably in the range of 8 to 30. .
The reason why a colored layer with high flatness can be obtained when the polymer chain of the polymerizable oligomer that becomes the graft chain has the structural unit represented by the general formula (II) is not clear, but is estimated as follows. Is done. That is, when the structural unit represented by the general formula (II) is included, it is presumed that the glass transition temperature of the graft chain is appropriately lowered, and the fluidity of the graft copolymer as a whole becomes high when a coating film is formed. Such a thermosetting resin composition containing a substantial amount of the graft copolymer as a pigment dispersant is ejected by an ink jet method, and is dried and cured in a region surrounded by a black matrix layer. It is presumed that the fluidity is increased, the film is easily embedded in the vicinity of the black matrix layer, the thickness of the thin portion is increased, and the TB difference can be reduced.

  The weight average molecular weight Mw of the polymerizable oligomer is preferably in the range of 700 to 10000, and more preferably in the range of 1000 to 5000. By being in the above range, a sufficient steric repulsion effect as a pigment dispersant can be obtained, so that reaggregation of the pigment can be suppressed.

The polymerizable oligomer used for the graft copolymer may be used alone or in combination of two or more.
When two or more kinds of polymerizable oligomers are used in combination, the polymerizable oligomer comprising a polymer chain containing the structural unit represented by the general formula (II) and a group having an ethylenically unsaturated double bond at the terminal However, what is necessary is just to use so that 50-95 weight% may be contained in all the copolymerization components.

The polymerizable oligomer may be appropriately synthesized or may be a commercially available product. As a commercial product of a polymerizable oligomer comprising a polymer chain containing the structural unit represented by the above general formula (II) and a group having an ethylenically unsaturated double bond at its terminal, for example, caprolactone-modified hydroxyethyl acrylate (“Placcel” FA10L (trade name) ”: manufactured by Daicel Chemical Industries, Ltd., caprolactone-modified hydroxyethyl methacrylate (“ Plexel FM5 (trade name) ”, and the like.
Other commercially available polymerizable oligomers that may be included include, for example, one-end methacryloylated polymethyl methacrylate oligomers (weight average molecular weight: 6000, “AA-6 (trade name)” manufactured by Toagosei Chemical Co., Ltd.), Single-end methacryloylated poly-n-butyl acrylate oligomer (weight average molecular weight: 6000, “AB-6 (trade name)” manufactured by Toagosei Chemical Co., Ltd.), single-end methacryloylated polystyrene oligomer (weight average molecular weight: 6000, “AS-6 (trade name)” manufactured by Toagosei Chemical Co., Ltd.).

  The polymerizable oligomer comprising a polymer chain containing the structural unit represented by the general formula (II) and a group having an ethylenically unsaturated double bond at its terminal is contained in an amount of 50 to 95% by weight in all copolymer components. There is a tendency that a colored layer with higher flatness can be formed as the amount of the polymerizable oligomer in the copolymer component increases. Although the pigment dispersibility is good, the graft copolymer used in the present invention from the balance point that the ratio of the graft chain in the graft copolymer is appropriate and a more flat colored layer can be formed. In the above, the repeating unit derived from the polymerizable oligomer is contained in a proportion of 50 to 95% by weight, and is preferably contained in a proportion of 70 to 90% by weight.

  In the graft copolymer used in the present invention, the repeating unit derived from the nitrogen-containing monomer is preferably contained in a proportion of 5 to 50% by weight, more preferably 10 to 30% by weight. If the content of the repeating unit derived from the nitrogen-containing monomer in the graft copolymer is within the above range, the proportion of the salt-forming site formed by the amino group in the graft copolymer will be appropriate, and depending on the polymerizable oligomer Since the decrease in solubility with a solvent can be suppressed, the adsorptivity to the pigment is improved, and the dispersibility of the pigment and the pigment dispersion stability are obtained.

  In addition, the weight average molecular weight Mw of the graft copolymer is preferably in the range of 1000 to 100,000, more preferably in the range of 3000 to 50000, and further in the range of 5000 to 30000. preferable. By being the said range, a pigment can be disperse | distributed uniformly.

  The weight average molecular weight Mw is a value measured by GPC (gel permeation chromatography). For the measurement, HLC-8120GPC manufactured by Tosoh Corporation was used, the elution solvent was N-methylpyrrolidone to which 0.01 mol / liter of lithium bromide was added, and the polystyrene standards for calibration curves were Mw377400, 210500, 96000, 50400. , 206500, 10850, 5460, 2930, 1300, 580 (Easi PS-2 series manufactured by Polymer Laboratories) and Mw1090000 (manufactured by Tosoh Corporation), and TSK-GEL ALPHA-M × 2 (Tosoh Corporation) (Made by Co., Ltd.).

  The graft copolymer used in the present invention has the above-described nitrogen-containing monomer and polymerizable oligomer as copolymer components, and further, the amino group of the nitrogen-containing monomer and a predetermined organic acid compound formed a salt. The structure is represented as shown in FIG. 3, for example. In FIG. 3, in the graft copolymer, the nitrogen-containing monomer unit 51 forms a main chain by a polymerization reaction, and a polymerizable group site (group site having an ethylenically unsaturated double bond) of the polymerizable oligomer in the polymerization reaction. 52 is simultaneously polymerized with a nitrogen-containing monomer, and the polymerizable oligomer forms a side chain as a polymer chain 53 while being connected to the base portion having the ethylenically unsaturated double bond, and the organic acid compound 54 contains nitrogen This is a salt formed with an amino group contained in the monomer unit 51.

<Organic acid compound>
Graft copolymer containing as a copolymer component a nitrogen-containing monomer represented by the general formula (I) and a polymerizable oligomer comprising a polymer chain and a group having an ethylenically unsaturated double bond at its terminal. The amino group of the nitrogen-containing monomer in the coalescence and the organic acid compound that forms a salt are represented by the organic phosphate compound having the structure represented by the general formula (III) and / or the general formula (IV). An organic sulfonic acid compound having a structure.

In the present invention, by using the organic acid compound, the pigment dispersant can be made excellent in the dispersibility and stability of the pigment described later.
In formula (III), ^{R 3} and R ^{3 'are} each independently a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, - [ CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ⁸ , — [(CH ₂ ) _b —O] _c —R ⁸ or —O—R ^{3 ″} , R ³ and R ^{3 ′} Any of which contains a carbon atom. In R ^3, R ^{3 ',} and R ^{3''and R 8,} an alkyl group, an alkenyl group, an aralkyl group, each aryl group may have a substituent.

  The alkyl group having 1 to 18 carbon atoms may be linear, branched or cyclic, for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group. , Sec-butyl group, tert-butyl group, various pentyl groups, various hexyl groups, various octyl groups, various decyl groups, various dodecyl groups, various tetradecyl groups, various hexadecyl groups, various octadecyl groups, cyclopentyl groups, cyclohexyl groups, cyclohexane Examples include an octyl group, a cyclododecyl group, a bornyl group, an isobornyl group, a dicyclopentanyl group, an adamantyl group, and a lower alkyl group-substituted adamantyl group.

  The alkenyl group having 2 to 18 carbon atoms may be linear, branched or cyclic. Examples of such alkenyl groups include vinyl groups, allyl groups, propenyl groups, various butenyl groups, various hexenyl groups, various octenyl groups, various decenyl groups, various dodecenyl groups, various tetradecenyl groups, various hexadecenyl groups, various octadecenyl groups, A cyclopentenyl group, a cyclohexenyl group, a cyclooctenyl group, etc. can be mentioned. The position of the double bond of the alkenyl group is not limited, but from the viewpoint of the reactivity of the polymer obtained, it is preferable that there is a double bond at the terminal of the alkenyl group. The alkyl group or alkenyl group may have a substituent, and examples of the substituent include halogen atoms such as F, Cl, and Br, nitro groups, and the like.

Examples of the aryl group which may have a substituent include a phenyl group, a biphenyl group, a naphthyl group, a tolyl group, and a xylyl group. 6-24 are preferable and, as for carbon number of an aryl group, 6-12 are more preferable.
Examples of the substituent of the aromatic ring such as an aryl group and an aralkyl group include an alkenyl group, a nitro group, and a halogen atom in addition to a linear or branched alkyl group having 1 to 4 carbon atoms.
The preferred carbon number does not include the carbon number of the substituent.

When R ³ and / or R ^{3 ′} is —O—R ^{3 ″} , it is an acidic phosphate ester. The R ^{3 ''} is an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl ^{group, - [CH (R 9)} -CH (R 10) -O] a -R ⁸ or a monovalent group represented by — [(CH ₂ ) _b —O] _c —R ⁸ .
The alkyl group having 1 to 18 carbon atoms, an alkenyl group and an aryl group having 2 to 18 carbon atoms is as shown by the above ^{R 3} and R ^{3 '.}

R ⁹ and R ¹⁰ each independently represent a hydrogen atom or a methyl group. R ⁸ is a hydrogen atom or may have a substituent, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, _-CHO, -CH 2 CHO,, -CO —CH═CH ₂ , —CO—C (CH ₃ ) ═CH ₂ , or a monovalent group represented by —CH ₂ COOR ¹¹ , wherein R ¹¹ is a hydrogen atom or a straight chain having 1 to 5 carbon atoms. A branched or cyclic alkyl group.
In the monovalent group represented by R ⁸ , the substituent that may be included is, for example, a linear, branched or cyclic alkyl group having 1 to 4 carbon atoms, a halogen atom such as F, Cl, or Br. And so on.
Alkyl group, an alkenyl group having 2 to 18 carbon atoms and aralkyl group, an aryl group, having 1 to 18 carbon atoms of the above ^{R 8} is as shown by the above ^{R 3} and R ^{3 '.}
In R ³ , R ^{3 ′} and R ^{3 ″} , a is an integer of 1 to 18, b is an integer of 1 to 5, and c is an integer of 1 to 18. a is preferably an integer of 1 to 4, more preferably an integer of 1 to 2, and b is preferably an integer of 1 to 4, more preferably 2 or 3. c is preferably an integer of 1 to 4, more preferably an integer of 1 to 2.

In the general formula (IV), R ⁴ represents an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH (R ¹⁰ ) —. _O] a ^-R _8, - shows a _{[(CH 2) b -O]} c -R 8 or -O-R ^{4 '.} In R ⁴ , R ^{4 ′} and R ⁸ , each of the alkyl group, alkenyl group, aralkyl group and aryl group may have a substituent.
The alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl ^{group, - [CH (R 9)} -CH (R 10) -O] a -R 8, - [(CH ₂ ) _b— O] _c —R ⁸ is as defined above for R ³ and R ^{3 ′} .

When R ⁴ is —O—R ^{4 ′} , it is an acidic sulfate. R ⁴ ′ is an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ^8. Or a monovalent group represented by — [(CH ₂ ) _b —O] _c —R ⁸ .
The alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl ^{group, - [CH (R 9)} -CH (R 10) -O] a -R 8, - [(CH _{2) b -O]} c -R ⁸ are as indicated by the ^{R 3} and R ^{3 '.}
Said R <^8> , R < ⁹ > and R < ¹⁰ > are the same as the above.
In the above ^{R 4} and R ^{4 ',} a is 1 to 18 integer, b is an integer of from 1 to 5, c is 1 to 18 integer. Desirable a, b and c are the same as R ³ , R ^{3 ′} and R ^{3 ″} .

As the organic acid compound represented by the general formula (III) and the general formula (IV), R ³ , R ^{3 ′} , R ^{3 ″} , R ⁴ and / or R ^{4 ′} are each independently a methyl group, An ethyl group, an aralkyl group, an aryl group, a vinyl group, an allyl group, or — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ⁸ or — [(CH ₂ ) _b —O] _c — It is R ⁸ and R ⁸ is preferably —CO—CH═CH ₂ or —CO—C (CH ₃ ) ═CH ₂ from the viewpoint of being excellent in pigment dispersibility.

Among them, any of R ³ , R ^{3 ′} , R ^{3 ″} , R ⁴ and R ^{4 ′} is a substituent having an aromatic ring, that is, an aryl group or an aralkyl group which may have a substituent, more specifically Are preferably a benzyl group, a phenyl group, a tolyl group, a biphenyl group, a naphthyl group, and the like.
In such a case, there is a merit that pigment dispersibility is particularly excellent.

In addition, any of R ³ , R ^{3 ′} , R ^{3 ″} , R ⁴ and R ^{4 ′} has a polymerizable group, that is, a vinyl group, an allyl group or — [CH (R ⁹ ) —CH (R ¹⁰⁾ -O] _a -R ⁸ or _{- [(CH 2) b -O} ] a _c -R ^8, and, ^{R 8} is -CO-CH = CH ₂ or _{-CO-C (CH 3) =} CH preferably it has from _2, in ^{particular, R 3, R 3 ',} R 3'', R 4 and R ^4' are each independently a vinyl group, an allyl group, 2-methacryloyloxyethyl group, acryloyloxyethyl What is group is preferable.
In such a case, the polymerizable groups can be polymerized at the time of thermal polymerization when the colored layer is formed using the thermosetting resin composition for a color filter of the present invention. In the above, the pigment dispersant can be stably present. Moreover, the heat resistance and solvent resistance of the colored layer are also improved. When a liquid crystal display device is manufactured using such a color filter, the pigment dispersant can be prevented from bleeding out to the liquid crystal layer or the like.
Furthermore, when the organic acid compound contains a polymerizable group, the polymerizable groups of the organic acid compound can be polymerized in the vicinity of the pigment after the pigment is dispersed. As a result, the pigment dispersant is fixed around the pigment, and the dispersibility and dispersion stability of the pigment can be improved.

The organic acid compound represented by the general formula (III) and the general formula (IV) is a compound in which a carbon atom is directly bonded to phosphorus (P) or sulfur (S) from the viewpoint of high heat resistance. R ³ and R ^{3 ′} are each independently a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an optionally substituted aryl group or aralkyl. ^{group, - [CH (R 9)} -CH (R 10) -O] a -R 8, or _{- [(CH 2) b -O} ] a monovalent group represented by c -R ^8, provided that R ³ and one of R ^{3 'is} preferably those containing carbon atoms. R ⁴ represents an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aryl group or an aralkyl group which may have a substituent, — [CH (R ⁹ ) —CH (R ¹⁰ ) -O] _a -R ⁸ or _a monovalent group represented by-[(CH ₂ ) _b -O] _c -R ⁸ is preferred.
In addition, the organic acid compound represented by the said general formula (III) and general formula (IV) can be used individually by 1 type or in combination of 2 or more types.

  The content of the organic acid compound in the graft copolymer used in the present invention is not particularly limited as long as good dispersion stability is exhibited, and is generally represented by the general formula (I). It is about 0.05-5.0 molar equivalent with respect to the amino group contained in the structural unit derived from a nitrogen-containing monomer, More preferably, it is 0.2-2.0 molar equivalent. In such a case, the pigment dispersibility and the pigment dispersion stability are excellent. In addition, when using together 2 or more types of the said organic acid compound, content which added these should just be in the said range.

In the thermosetting resin composition for a color filter of the present invention, as described above, as the pigment dispersant of the component (A), as described above, the nitrogen-containing monomer represented by the general formula (I), the polymer chain, and the terminal thereof A graft copolymer containing, as a copolymerization component, a polymerizable oligomer composed of a group having an ethylenically unsaturated double bond, and further, an amino group of the nitrogen-containing monomer, a general formula (III) and / or a general A salt-type graft copolymer obtained by forming a salt with the organic acid compound represented by the formula (IV) is used.
By using such a salt-type graft copolymer as a pigment dispersant, the thermosetting resin composition for a color filter of the present invention can be made excellent in pigment dispersion stability.

<Production of salt-type graft copolymer>
In the present invention, the production method of the salt-type graft copolymer used as the pigment dispersant of the component (A) includes the nitrogen-containing monomer, a polymer chain, and a group having an ethylenically unsaturated double bond at its terminal. The amino group which the nitrogen-containing monomer has and the organic acid compound represented by the general formula (III) and the general formula (IV) form a salt. The method is not particularly limited as long as it is a method capable of manufacturing the manufactured product. In the present invention, for example, the nitrogen-containing monomer, the polymerizable oligomer having an ethylenically unsaturated double bond, and, if necessary, other monomers can be graft-polymerized using a known polymerization means. It is. Next, the salt-type graft copolymer can be produced by adding the organic acid compound to the solvent and stirring. In the above polymerization, additives generally used in the polymerization, for example, a polymerization initiator, a dispersion stabilizer, a chain transfer agent and the like may be used.

  In the thermosetting resin composition for a color filter of the present invention, as the pigment dispersant which is the component (A), one type of the above salt-type graft copolymer may be used, or two or more types may be used in combination. The content is appropriately selected according to the type of pigment used and the solid content concentration in the thermosetting resin composition. In the thermosetting resin composition for a color filter of the present invention, the pigment dispersant as the component (A) is usually in the range of 5 to 200 parts by weight with respect to 100 parts by weight of the pigment described later. The amount is preferably 100 parts by weight, and more preferably 20 to 80 parts by weight. If the content of the salt-type graft copolymer is within the above range, the pigment can be uniformly dispersed. Moreover, in the thermosetting resin composition, a colored layer having sufficient hardness can be formed without relatively reducing the blending ratio of the thermosetting binder.

((B) Pigment)
In the thermosetting resin composition for a color filter of the present invention, the pigment used as the component (B) is not particularly limited as long as it can produce a desired color when a colored layer of the color filter is formed. Various organic or inorganic colorants can be used alone or in admixture of two or more.
<Type of pigment>
As the organic colorant, for example, dyes, organic pigments, natural pigments, and the like can be used. Specific examples of the organic pigment include compounds classified as pigments in the color index (CI; issued by The Society of Dyers and Colorists).
Examples of such compounds include C.I. I. Pigment yellow 1, C.I. I. Pigment yellow 3, C.I. I. Pigment yellow 12, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139, 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 242, C.I. I. Pigment red 254, C.I. I. Red pigments 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 such as Pigment Violet 23; and Pigment Green 36, C.I. I. And pigments having a color index (C.I.) number such as CI pigment green 58.

  Further, as the inorganic colorant, for example, inorganic pigments, extender pigments and the like can be used. Specific examples include titanium oxide, silica, barium sulfate, calcium carbonate, zinc white, lead sulfate, yellow lead, zinc yellow, Bengala (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 mentioned.

<Particle particle size>
The average particle diameter of the pigment used in the present invention is not particularly limited as long as it can produce a desired color when it is used as a colored layer of a color filter, and varies depending on the type of pigment used. It is preferably in the range of ˜100 nm, and more preferably in the range of 10 to 50 nm. When the average particle diameter of the pigment is within the above range, the liquid crystal display device produced using the thermosetting resin composition for a color filter of the present invention can have high contrast and high quality. . In addition, with conventional pigment dispersants, there is a problem in that the dispersibility becomes insufficient as the particle size of the pigment becomes smaller, and the coating performance deteriorates due to the need for a large amount of pigment dispersant. Although there is a possibility, since the pigment dispersant used for the thermosetting resin composition for color filters of this invention is excellent in pigment dispersibility by addition of a comparatively small amount, there is little possibility of causing such a problem. Therefore, as the average particle size of the pigment is within the above range, the smaller the conventional particle size is, the more characteristic the color filter thermosetting resin composition of the present invention has.
In addition, the average particle diameter of the pigment can be obtained by a method of directly measuring the size of primary particles from an electron micrograph. Specifically, the minor axis diameter and major axis diameter of each primary particle were measured, and the average was taken as the particle diameter of the particle. Next, for 100 or more particles, the volume (weight) of each particle was obtained by approximating the obtained particle size to a rectangular parallelepiped, and the volume average particle size was obtained and used as the average particle size. The same result can be obtained regardless of whether the electron microscope is a transmission type (TEM) or a scanning type (SEM).

In the thermosetting resin composition for a color filter of the present invention, the content of the pigment used as the component (B) is not particularly limited as long as a desired color can be formed when the colored layer of the color filter is used. Depending on the type of pigment used, it is preferably in the range of 20 to 100% by weight, preferably 30 to 80% by weight, based on the solid content other than the pigment in the thermosetting resin composition for color filters. It is more preferable to be within the range. When the content of the pigment is within the above range, a thermosetting resin composition for a color filter capable of forming a colored layer capable of forming a desired color can be obtained, and further, the thermosetting resin composition for a color filter. It can be uniformly dispersed in the product.
In particular, C.I. I. Pigment Red 254, C.I. I. When pigment green 58 is used, or when it is necessary to increase the pigment concentration in the solid content of the composition in order to reduce the thickness of the colored layer, the pigment dispersant used in the present application is particularly effective.
In addition, solid content is all except a solvent, and a liquid polyfunctional monomer etc. are also contained.

((C) thermosetting binder)
As the thermosetting binder, a combination of a compound having two or more thermosetting functional groups in one molecule and a curing agent is usually used, and a catalyst capable of promoting a thermosetting reaction may be added. An epoxy group is preferably used as the thermosetting functional group. Moreover, you may use further the polymer which has no polymerization reactivity in itself.

  As a compound having two or more thermosetting functional groups in one molecule, an epoxy compound having two or more epoxy groups in one molecule is usually used. An epoxy compound having two or more epoxy groups in one molecule is an epoxy compound having two or more, preferably 2 to 50, more preferably 2 to 20 epoxy groups in one molecule (referred to as an epoxy resin). Is included). The epoxy group should just be a structure which has an oxirane ring structure, for example, can show a glycidyl group, an oxyethylene group, an epoxycyclohexyl group, etc. Examples of the epoxy compound include known polyvalent epoxy compounds that can be cured by carboxylic acid. Examples of such an epoxy compound include “Epoxy resin handbook” edited by Masaki Shinbo, published by Nikkan Kogyo Shimbun (Showa 62). These can be used widely.

i) Compound having two or more thermosetting functional groups in one molecule As an epoxy compound (hereinafter sometimes referred to as “binder epoxy compound”) which is a polymer having a relatively high molecular weight, which is usually used as a binder component. A polymer having at least two structural units represented by the following formula (V) and structural units represented by the following formula (VI) and having two or more glycidyl groups can be used.

（Ｒ^２１は水素原子または炭素数１〜３のアルキル基であり、Ｒ^２２は炭素数１〜１２の炭化水素基である。）

(R ²¹ is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R ²² is a hydrocarbon group having 1 to 12 carbon atoms.)

（Ｒ^２３は水素原子又は炭素数１〜１０のアルキル基である。）

^{(R 23} is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.)

By using the structural unit represented by the formula (V) as the structural unit of the binder epoxy compound, sufficient hardness and transparency can be imparted to the cured coating film formed from the inkjet ink of the present invention. In the formula (V), R ²¹ is preferably hydrogen or a methyl group. R ²² is a hydrocarbon group having 1 to 12 carbon atoms, straight-chain aliphatic, cycloaliphatic, may be an aromatic one hydrocarbon group, more additional structures, for example double bonds, carbonized It may contain a hydrogen group side chain, a spiro ring side chain, an intra-ring bridged hydrocarbon group, and the like.

  Specific examples of the monomer for deriving the structural unit represented by the above formula (V) include methyl (meth) acrylate, ethyl (meth) acrylate, i-propyl (meth) acrylate, n-propyl (meth) acrylate, i -Butyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, hexyl (meth) acrylate, octyl (meth) acrylate, lauryl (meth) acrylate, cyclohexyl Examples include (meth) acrylate, para-t-butylcyclohexyl (meth) acrylate, isobornyl (meth) acrylate, benzyl (meth) acrylate, dicyclopentenyl (meth) acrylate, phenyl (meth) acrylate, and the like.

The structural unit represented by the formula (VI) is used for introducing an epoxy group (epoxy reaction point) into the polymer. The ink-jet ink containing the polymer is excellent in storage stability and hardly increases in viscosity during storage and discharge operations, because one of the reasons is that the epoxy group in formula (VI) is a glycidyl group. Presumed to be.
In formula (VI), R ²³ is preferably hydrogen or a methyl group. Specific examples of the monomer for deriving the structural unit represented by the formula (VI) include glycidyl (meth) acrylate, and glycidyl methacrylate (GMA) is particularly preferable.

  The polymer may be a random copolymer or a block copolymer. The polymer may contain main chain constituent units other than those of formula (V) or formula (VI) as long as the performance required for each detail of the color filter, such as hardness and transparency, can be ensured. Good. Specific examples of such a monomer include acrylonitrile and styrene.

  The content of the structural unit of the formula (V) and the structural unit of the formula (VI) in the binder epoxy compound is preferably in the range of 10:90 to 90:10. When the amount of the structural unit of the formula (1) is more than the above ratio of 10:90, there is a possibility that the reaction point of curing decreases and the crosslinking density is lowered, whereas the structural unit of the formula (2) If the amount is more than the above ratio 90:10, the bulky skeleton may be reduced and curing shrinkage may be increased.

  The weight average molecular weight of the binder epoxy compound is preferably 3,000 or more, particularly 4,000 or more, when expressed in terms of polystyrene-converted weight average molecular weight. This is because if the molecular weight of the binder epoxy compound is less than 3,000, physical properties such as strength and solvent resistance required for the cured layer as the details of the color filter are likely to be insufficient. On the other hand, the weight average molecular weight of the binder epoxy compound is preferably 20,000 or less, more preferably 15,000 or less, when expressed in terms of polystyrene-converted weight average molecular weight. If the molecular weight is more than 20,000, the viscosity is likely to increase, and the stability of the ejection amount and the straightness of the ejection direction when ejecting from the ejection head by the inkjet method may be deteriorated, and the stability of long-term storage It is because there is a possibility that it may become worse. In addition, the said binder epoxy compound is compoundable by the method as described in the paragraph number 0148 of Unexamined-Japanese-Patent No. 2006-106503, for example.

  The thermosetting binder according to the present invention is an epoxy compound having two or more epoxy groups in one molecule (hereinafter sometimes referred to as “polyfunctional epoxy compound”), which is more than the binder epoxy compound. Those having a small molecular weight may be used. Especially, it is preferable to use the said binder epoxy compound and the said polyfunctional epoxy compound together as mentioned above. In this case, the polystyrene equivalent weight average molecular weight of the polyfunctional epoxy compound is preferably 4,000 or less, and particularly preferably 3,000 or less, on condition that it is smaller than the binder epoxy compound combined therewith. When a polyfunctional epoxy compound having a relatively small molecular weight is added to the ink-jet ink, the epoxy group is replenished in the ink-jet ink, the reaction point concentration of the epoxy is increased, and the crosslinking density can be increased.

  Among polyfunctional epoxy compounds, it is preferable to use an epoxy compound having four or more epoxy groups in one molecule in order to increase the crosslink density of the acid-epoxy reaction. In particular, when the weight average molecular weight of the binder epoxy compound is set to 10,000 or less in order to improve the discharge performance from the inkjet discharge head, the strength and hardness of the cured layer are likely to decrease. It is preferable to add a tetrafunctional or higher polyfunctional epoxy compound to the inkjet ink to sufficiently increase the crosslinking density.

  The polyfunctional epoxy compound is not particularly limited as long as it contains two or more epoxy groups in one molecule. For example, bisphenol A type epoxy resin, bisphenol F type epoxy resin, brominated bisphenol A type epoxy resin, Bisphenol S type epoxy resin, diphenyl ether type epoxy resin, hydroquinone type epoxy resin, naphthalene type epoxy resin, biphenyl type epoxy resin, fluorene type epoxy resin, phenol novolac type epoxy resin, orthocresol novolak type epoxy resin, trishydroxyphenylmethane type epoxy Resin, trifunctional epoxy resin, tetraphenylolethane type epoxy resin, dicyclopentadienephenol type epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol A included Polyol type epoxy resins, polypropylene glycol type epoxy resins, glycidyl ester type epoxy resin, glycidyl amine type epoxy resin, glyoxal type epoxy resins, alicyclic epoxy resins, and the like heterocyclic epoxy resin.

  More specifically, bisphenol A type epoxy resins such as trade name Epicoat 828 (manufactured by Japan Epoxy Resin Co., Ltd.), bisphenol F type epoxy resins such as trade name YDF-175S (manufactured by Tohto Kasei Co., Ltd.), trade name YDB-715 ( Brominated bisphenol A type epoxy resin such as Toto Kasei Co., Ltd., Bisphenol S type epoxy resin such as EPICLON EXA1514 (Dainippon Ink Chemical Co., Ltd.), hydroquinone such as YDC-1312 (Toto Kasei Co., Ltd.) Type epoxy resin, naphthalene type epoxy resin such as trade name EPICLON EXA4032 (manufactured by Dainippon Ink and Chemicals), biphenyl type epoxy resin such as trade name Epicoat YX4000H (made by Japan Epoxy Resin), trade name Epicoat 157S70 (Japan Epoch) Bisphenol A type novolak epoxy resin such as Xylen Resin), brand name Epicoat 154 (Japan Epoxy Resin Co., Ltd.), brand name YDPN-638 (manufactured by Tohto Kasei Co., Ltd.), phenol novolac type epoxy resin, brand name YDCN-701 Cresol novolak type epoxy resin (made by Toto Kasei Co., Ltd.), dicyclopentadiene phenol type epoxy resin such as EPICLON HP-7200 (made by Dainippon Ink & Chemicals, Inc.), trade name Epicoat 1032H60 (made by Japan Epoxy Resin Co., Ltd.) Such as trishydroxyphenylmethane type epoxy resin, trifunctional epoxy resin such as trade name VG3101M80 (manufactured by Mitsui Chemicals), and tetraphenylolethane type such as trade name Epicoat 1031S (made by Japan Epoxy Resin Co., Ltd.) Xi resin, tetrafunctional epoxy resin such as trade name Denacol EX-411 (manufactured by Nagase Kasei Kogyo Co., Ltd.), hydrogenated bisphenol A type epoxy resin such as trade name ST-3000 (manufactured by Toto Kasei Co., Ltd.), trade name Epicoat 190P ( Glycidyl ester type epoxy resin such as Japan Epoxy Resin Co., Ltd., glycidyl amine type epoxy resin such as YY-434 (manufactured by Tohto Kasei Co., Ltd.) Examples include alicyclic polyfunctional epoxy compounds such as trade name Eporide GT-401 (manufactured by Daicel Chemical Industries), and heterocyclic epoxy resins such as triglycidyl isocyanate (TGIC). Further, if necessary, a trade name Neotote E (manufactured by Toto Kasei Co., Ltd.) can be mixed as an epoxy reactive diluent.

  The blending ratio of the binder epoxy compound and the polyfunctional epoxy compound blended as necessary is 10 to 80 parts by weight of the binder epoxy compound and 10 to 60 parts by weight of the polyfunctional epoxy compound in weight ratio. It is preferable to mix, and it is more preferable to mix 20-60 parts by weight of the binder epoxy compound and 20-50 parts by weight of the polyfunctional epoxy compound, and 30-40 parts by weight of the binder epoxy compound is multifunctional. It is particularly preferable to blend the epoxy compound in a proportion of 25 to 35 parts by weight.

ii) Curing agent The thermosetting binder used in the present invention is usually combined with a curing agent. As the curing agent, for example, a polyvalent carboxylic acid anhydride or a polyvalent carboxylic acid is used.
Specific examples of the polyvalent carboxylic acid anhydride include phthalic anhydride, itaconic anhydride, succinic anhydride, citraconic anhydride, dodecenyl succinic anhydride, tricarballylic anhydride, maleic anhydride, hexahydrophthalic anhydride, dimethyltetrahydro anhydride Aliphatic or alicyclic dicarboxylic anhydrides such as phthalic acid, hymic anhydride, and nadic anhydride; fats such as 1,2,3,4-butanetetracarboxylic dianhydride and cyclopentanetetracarboxylic dianhydride Aromatic polycarboxylic dianhydrides; aromatic polycarboxylic anhydrides such as pyromellitic anhydride, trimellitic anhydride, and benzophenone tetracarboxylic anhydride; ester groups such as ethylene glycol bistrimellitic acid and glycerin tristrimellitic acid Containing acid anhydrides, particularly preferably aromatic poly It may be mentioned carboxylic acid anhydrides. Moreover, the epoxy resin hardening | curing agent which consists of a commercially available carboxylic acid anhydride can also be used suitably.
Specific examples of the polyvalent carboxylic acid used in the present invention include aliphatic polyvalent carboxylic acids such as succinic acid, glutaric acid, adipic acid, butanetetracarboxylic acid, maleic acid, and itaconic acid; hexahydrophthalic acid, Aliphatic polycarboxylic acids such as 1,2-cyclohexanedicarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid, cyclopentanetetracarboxylic acid, and phthalic acid, isophthalic acid, terephthalic acid, pyromellitic acid, trimellitic acid, Aromatic polyvalent carboxylic acids such as 1,4,5,8-naphthalenetetracarboxylic acid and benzophenonetetracarboxylic acid can be mentioned, and aromatic polyvalent carboxylic acids can be mentioned preferably.

  These curing agents can be used singly or in combination of two or more. The amount of the curing agent used in the present invention is usually in the range of 1 to 100 parts by weight per 100 parts by weight of the component containing the epoxy group (total amount of the binder epoxy compound and the polyfunctional epoxy compound), preferably Is 5 to 50 parts by weight. If the blending amount of the curing agent is less than 1 part by weight, curing may be insufficient and a tough coating film may not be formed. Moreover, when the compounding quantity of a hardening | curing agent exceeds 100 weight part, there exists a possibility that the adhesiveness with respect to the board | substrate of a coating film may be inferior.

iii) Catalyst In order to improve the hardness and heat resistance of the cured layer, a catalyst capable of promoting an acid-epoxy thermosetting reaction may be added to the thermosetting binder of the present invention. As such a catalyst, a thermal latent catalyst that exhibits activity during heat curing can be used.
The heat-latent catalyst exhibits catalytic activity when heated, accelerates the curing reaction and gives good properties to the cured product, and is added as necessary. The thermal latent catalyst is preferably one that exhibits acid catalytic activity at a temperature of 60 ° C. or higher. As such, a compound obtained by neutralizing a protonic acid with a Lewis base, a compound obtained by neutralizing a Lewis acid with a Lewis base, Lewis Examples thereof include a mixture of an acid and a trialkyl phosphate, sulfonic acid esters, onium compounds and the like, and various compounds described in JP-A-4-218561 can be used. The thermal latent catalyst is usually blended at a ratio of about 0.01 to 10.0 parts by weight with respect to a total of 100 parts by weight of the compound having two or more thermosetting functional groups in one molecule and the curing agent. .

  In the thermosetting resin composition for color filters of the present invention, the ratio (P / V ratio) between the weight (P) of the pigment and the weight (V) of the solid content other than the pigment is the red colored layer. When forming 0.4 to 1.1, preferably 0.5 to 1.0, when forming green colored layer 0.5 to 1.2, preferably 0.6 to 1.0, blue colored layer When forming, it is 0.2 to 0.6, preferably 0.3 to 0.5. In such a case, it is preferable from the viewpoint of the balance between ink ejection performance, prevention of ink breakage, and film properties obtained. If the P / V ratio is too low, in order to obtain sufficient coloring power, it is necessary to increase the amount of ink droplets that adhere to the pixel formation region, which causes problems such as ink breaking from the pixel formation region. There is a case. On the other hand, if the P / V ratio is too high, there may be a problem that the ejection performance such as clogging or flight bending occurs in the ejection head or the film surface becomes rough.

((D) solvent)
In the thermosetting resin composition for a color filter of the present invention, the (D) solvent is an organic solvent that does not react with each component in the thermosetting resin composition and can dissolve or disperse them. Good. In particular, when used as an ink-jet ink, a boiling point of 180 ° C. or higher is used in order to improve dischargeability without adversely affecting the straightness and stability of discharge without causing a sudden increase in viscosity or clogging of the ink. Solvent component having a vapor pressure at 260 ° C., particularly 210 ° C. to 260 ° C. and a normal temperature (particularly in the range of 18 ° C. to 25 ° C.) of 0.5 mmHg (66.7 Pa) or less, particularly 0.1 mmHg (13.3 Pa) or less Is preferably used as the main solvent. For example, ethylene glycol monobutyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol dibutyl ether, diethyl adipate, dibutyl oxalate, dimethyl malonate, diethyl malonate, dimethyl succinate, and diethyl succinate. It can be illustrated. The “main solvent” is a solvent that accounts for 50% by weight or more of the total amount of the solvent. The main solvent is desirably used in the highest possible blending ratio. Specifically, it is 70% by weight or more, preferably 90% by weight or more, and most preferably 100% by weight.

  While it is slow to dry, it has excellent intermittent ejection characteristics with ink jets. On the other hand, there is a problem in production efficiency because of slow drying during coating film formation, so the main solvent has a lower boiling point for the purpose of improving production efficiency. A solvent may be mixed. Other co-solvents preferably used in combination with the main solvent include, for example, glycol ethers such as ethylene glycol monoethyl ether and diethylene glycol diethyl ether; glycol ether esters such as ethylene glycol monomethyl ether acetate; diethylene glycol monomethyl ether Glycol oligomer ethers such as: glycol oligomer ether esters such as diethylene glycol monomethyl ether acetate; aliphatic or aromatic esters such as ethyl acetate, propyl benzoate; dicarboxylic acid diesters such as diethyl carbonate; Alkoxycarboxylic esters such as methyl methoxypropionate and ethyl 3-ethoxypropionate; such as ethyl acetoacetate Tricarboxylic acid esters; alcohols or phenols such as ethanol, isopropanol and phenol; aliphatic or aromatic ethers such as diethyl ether and anisole; alkoxy such as 2-ethoxyethanol and 1-methoxy-2-propanol Examples include alcohols; glycol oligomers such as diethylene glycol and tripropylene glycol; alkoxy alcohol esters such as 2-ethoxyethyl acetate; ketones such as acetone and methyl isobutyl ketone.

  The content of the solvent (D) in the thermosetting resin composition for a color filter of the present invention is not particularly limited as long as it can uniformly dissolve or disperse the respective constituent components. In particular, when used as an inkjet ink, the solvent is preferably used in a proportion of usually 40 to 95% by weight with respect to the total amount of the thermosetting resin composition for a color filter. When the amount of the solvent is too small, the viscosity of the inkjet ink is high, and in the case of the inkjet ink, it becomes difficult to discharge from the inkjet head. Also, if there is too much solvent, the ink will break from the predetermined ink layer formation site, the amount of ink that can be deposited on the ink layer formation site will be insufficient, the film thickness after drying will be too thin, Accordingly, a sufficient transmission density cannot be obtained.

(Optional additive)
The thermosetting resin composition for a color filter of the present invention may contain various additives as necessary within a range that does not impair the object of the present invention. Examples of the additive include a leveling agent, a plasticizer, a surfactant, a silane coupling agent, an ultraviolet absorber, an adhesion promoter, a filler, and the like.
Examples of the adhesion promoter include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, and the like. Examples of the leveling agent include fluorosurfactants such as polyoxyalkylene surfactants, fatty acid ester surfactants, vinyl polymers such as special acrylic polymers, vinyl ether polymers, and the like.

(Preparation of thermosetting resin composition for color filter)
As a method for preparing a thermosetting resin composition for a color filter, the above-described (A) pigment dispersant, (B) pigment, (C) thermosetting binder, and various additive components used as desired, (D) Any method can be used as long as it can be uniformly dissolved or dispersed in a solvent, and is not particularly limited, and can be prepared by mixing using a known mixing means.
As a preparation method of the thermosetting resin composition, for example, (1) After adding the above-mentioned pigment dispersant and pigment in a solvent and dispersing using a disperser, a pigment dispersion is prepared, (2) The above-mentioned pigment dispersant, pigment, and thermosetting binder are optionally used in a solvent. A method of adding and mixing various additive components at the same time, and (3) After adding and mixing the above-mentioned pigment dispersant, thermosetting binder, and various additive components as required, in a solvent, Examples of the method include adding a pigment to the mixture and mixing them.
Among these methods, the method (1) is preferable from the viewpoint that the aggregation of the pigment can be effectively prevented and the pigment can be uniformly dispersed. In this case, the content of the solvent in the pigment dispersion is preferably in the range of 60 to 90% by weight from the viewpoint of the dispersibility of the pigment, the pigment dispersion stability over time, the chromaticity of the obtained color filter, and the like.

In the preparation of the pigment dispersion in the above method (1), as a disperser for performing a pigment dispersion treatment, a roll mill such as a two-roll or a three-roll, a ball mill such as a ball mill or a vibration ball mill, a paint shaker, a continuous Examples thereof include a bead mill such as a disk type bead mill and a continuous annular type bead mill. As a preferable dispersion condition of the bead mill, the bead diameter to be used is preferably 0.03 to 2 mm, more preferably 0.1 to 1 mm. Moreover, it is preferable to filter with a membrane filter of about 5.0 to 0.2 μm after dispersion. Thereby, the pigment dispersion liquid excellent in the dispersibility of a pigment is obtained.
Further, when the organic acid compound contained in the pigment dispersant used in the present invention has a polymerizable group, for example, after adding the pigment dispersant and the initiator in the solvent, or in the solvent The pigment dispersant may be polymerized after dispersing or dissolving the pigment dispersant, the pigment, and the initiator. In particular, it is preferable to polymerize the pigment dispersants after dispersing or dissolving the pigment dispersant, the pigment, and the initiator in a solvent. Thus, the dispersion stability of the pigment in the thermosetting resin composition of this invention can be improved by polymerizing pigment dispersants. The polymerization can be carried out by light irradiation and / or heating using a photoinitiator and / or a thermal initiator as appropriate.

Next, the color filter of the present invention will be described.
[Color filter]
The color filter of the present invention is a color filter comprising at least a transparent substrate and a colored layer provided on the transparent substrate, wherein at least one of the colored layers is the thermosetting resin composition for a color filter of the present invention. It has the coloring layer formed using a thing, It is characterized by the above-mentioned.
Such a color filter of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view showing an example of the color filter of the present invention. According to FIG. 1, the color filter 10 of the present invention includes a transparent substrate 1, a light shielding part 2, and colored layers 3 </ b> R, 3 </ b> G, 3 </ b> B.
The color filter of the present invention is excellent in pigment dispersibility by forming a colored layer using the thermosetting resin composition for a color filter of the present invention described above, and is flat when formed using an ink jet method. Since it is possible to form an excellent colored layer, it has good optical performance.

(Transparent substrate)
The transparent substrate in the color filter of the present invention 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-1 mm can be used, for example.

(Shading part)
The light shielding part in the color filter of the present invention is formed in a pattern on a transparent substrate, and can be the same as that used as a light shielding part in a general color filter. When the colored layer is formed by the inkjet method, the light-shielding portion is a partition for adhering the ink to a predetermined region, and is provided so as to surround each colored layer and outside the colored layer forming region, thereby displaying a display image. The contrast can be improved.

The light shielding part may be a metal thin film such as chromium by sputtering, vacuum deposition or the like. Alternatively, 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 resin binder. In the case of a resin layer containing light-shielding particles, there are a method of patterning by development using a photosensitive resist, a method of patterning using an inkjet ink containing light-shielding particles, a method of thermally transferring the photosensitive resist, etc. is there.
The thickness of the light shielding part is about 1000 to 2000 mm in the case of a metal thin film, and about 0.5 to 2.5 μm in the case of a light shielding resin layer.

It is preferable that the light shielding part has liquid repellency. This is because the thermosetting resin composition applied by the ink jet method can be stably applied in the opening, and the colored layer can be free of color mixing. The “liquid repellency” means that the contact angle with the thermosetting resin composition is large.
The method for making the light-shielding part have liquid repellency is not particularly limited as long as it can provide a desired liquid repellency. For example, as a material constituting the light-shielding part, A method of forming a light-shielding portion by the above-described method using a material having higher liquid repellency than the substrate surface (hereinafter referred to as the first embodiment), or after forming the light-shielding portion on the substrate by the above-described method. In addition, a method of making the light-shielding part more liquid repellent than the substrate surface (hereinafter referred to as a second aspect) can be exemplified.

  Specific examples of the first aspect include a method in which the light-shielding portion is formed as a resin and a light-shielding material, and the resin contains a liquid repellent agent.

In addition, as the second aspect, specifically, a substrate made of an inorganic material is used as the substrate, and a material made of a resin and a light-shielding material is used as the light-shielding portion. An example is a method of performing a plasma treatment using a fluorine gas as an introduction gas after forming the light shielding portion.
As the fluorine compound for use in the gas introduced, for _example, a _{CF 4, SF 6, CHF 3} , C 2 F 6, C 3 F 8, C 5 F 8 or the like. Further, the introduced gas may be a mixture of the fluorine gas and another gas. Examples of the other gas include nitrogen, oxygen, argon, helium, etc. Among them, nitrogen is preferably used. Further, when nitrogen is used as the other gas, the mixing ratio of nitrogen is preferably 50% or more.

In addition, the method of performing the plasma irradiation is not particularly limited as long as it can improve the liquid repellency of the light shielding portion. For example, the plasma irradiation may be performed under reduced pressure, or the atmospheric pressure Plasma irradiation may be performed below. Among these, in this step, it is particularly preferable to perform plasma irradiation under atmospheric pressure. This is because a decompression device or the like is not necessary, which is advantageous in terms of cost, manufacturing efficiency, and the like.
In addition, the presence of fluorine in the light-shielding part after the plasma irradiation is performed in all elements detected from the surface of the light-shielding part in the analysis by an X-ray photoelectron spectrometer (XPS: ESCALAB 220i-XL). This can be confirmed by measuring the proportion of fluorine element.

  Specifically, the contact angle with the colored layer forming coating solution on the surface of the light shielding part may be larger than the contact angle with the colored layer forming coating solution on the substrate surface. If it is good. In particular, in this step, it is preferable that the contact angle of the surface of the light-shielding part with a liquid with a surface tension of 40 mN / m is about 10 ° or more, and particularly the contact angle with a liquid with a surface tension of 30 mN / m. The contact angle with the liquid having a surface tension of 20 mN / m is more preferably about 10 ° or more. Moreover, it is preferable that the contact angle with pure water is about 11 ° or more.

(Colored layer)
The colored layer used in the color filter of the present invention is not particularly limited as long as it is formed using the above-described thermosetting resin composition for color filters of the present invention. In this invention, it is preferable that it is a colored layer formed by the inkjet system in the opening part of the light-shielding part on the said transparent substrate. According to the ink jet method, productivity is higher than conventional photolithography methods and the like, and cost reduction and yield improvement can be realized. When formed by an ink jet method, the thickness of the colored layer is characterized by non-uniformity in the region of the colored layer. For example, as shown in 3R, 3G, and 3B in FIG. 1, a portion having a small thickness is provided at or near the outer edge portion of the colored layer, and the maximum thickness portion is located closer to the center of the pixel than the thin portion. That is, it has a cross-sectional shape in which the vicinity of the center is raised. “Thickness is non-uniform in the region of the colored layer” means that the thickness difference is 0.1 μm or more. The thickness of the colored layer can be measured using, for example, a light interference type three-dimensional non-contact surface shape / roughness measuring device (product name: NEW VIEW 6000, manufactured by Zygo Corporation).

  When the average thickness is 1.85 μm, the difference between the thickest part (T) and the thinnest part (B) (T−B difference) is 1.35 μm or less. Preferably, it is further preferably 1.0 μm or less, more preferably 0.8 μm or less.

In addition, the arrangement of the colored layers is not particularly limited, and for example, a general arrangement such as a stripe type, a mosaic type, a triangle type, or a four-pixel arrangement type can be used. Moreover, the width | variety, area, etc. of a colored layer can be set arbitrarily.
The average thickness of the colored layer is appropriately controlled by adjusting the coating method, the solid content concentration, the viscosity, and the like of the thermosetting resin composition for a color filter, but is usually in the range of 1 to 5 μm. Preferably, it is further in the range of 1 to 2.5 μm.

The colored layer can be formed, for example, by the following method.
First, the thermosetting resin composition for a color filter according to the present invention, in which pigments for blue (B), green (G), and red (R) are blended, is prepared. And the thermosetting resin composition for color filters of a color corresponding to the colored layer formation area of each color (R, G, B) defined by the pattern of the light shielding part 2 on the surface of the transparent substrate 1 is an ink jet system. To form an ink layer by selectively attaching. In this ink spraying process, the ink jet ink is unlikely to increase in viscosity at the tip of the ink jet head, and it is necessary to continue to maintain good ejection properties. In this case, the ink of the corresponding color can be adhered accurately and uniformly in a predetermined colored layer forming region, and a pixel portion free from color unevenness and color loss can be formed with an accurate pattern. . Moreover, since the inkjet ink of each color can be simultaneously sprayed on a board | substrate using a some head, working efficiency can be improved compared with the case where a colored layer is formed for every color by methods, such as printing.

Next, the ink layer of each color is dried and prebaked as necessary, and then cured by appropriate exposure and / or heating. When the ink layer is appropriately exposed and / or heated, the crosslinking element of the curable resin contained in the inkjet ink causes a crosslinking reaction, and the ink layer is cured to form the colored layers 3R, 3G, and 3B.
The color filter of the present invention may be one in which, for example, an overcoat layer, a transparent electrode layer, an alignment film, a columnar spacer, or the like is formed in addition to the transparent substrate, the light shielding portion, and the colored layer. .

Next, the liquid crystal display device of the present invention will be described.
[Liquid Crystal Display]
The liquid crystal display device of the present invention has the color filter of the present invention described above.
Such a liquid crystal display device of the present invention will be described with reference to the drawings. FIG. 2 is a schematic view showing an example of the liquid crystal display device of the present invention. As illustrated in FIG. 2, the liquid crystal display device 40 of the present invention includes a color filter 10, a counter substrate 20 having a TFT array substrate and the like, and a liquid crystal layer formed between the color filter 10 and the counter substrate 20. 30.
Note that the liquid crystal display device of the present invention is not limited to the configuration shown in FIG. 2, but can be a configuration generally known as a liquid crystal display device using a color filter.

The driving method of the liquid crystal display device of the present invention is not particularly limited, and a driving method generally used for a liquid crystal display device can be employed. Examples of such a driving method include a TN method, an IPS method, an OCB method, and an MVA method. In the present invention, any of these methods can be preferably used.
Further, the counter substrate can be appropriately selected and used depending on the driving method of the liquid crystal display device of the present invention.
Furthermore, as the liquid crystal constituting the liquid crystal layer, various liquid crystals having different dielectric anisotropy and mixtures thereof can be used according to the driving method of the liquid crystal display device of the present invention.

As a method for forming the liquid crystal layer, a method generally used as a method for manufacturing a liquid crystal cell can be used, and examples thereof include a vacuum injection method and a liquid crystal dropping method.
In the vacuum injection method, for example, a liquid crystal cell is prepared in advance using a color filter and a counter substrate, and the liquid crystal is heated to obtain an isotropic liquid, and the liquid crystal is applied to the liquid crystal cell using the capillary effect. The liquid crystal layer can be formed by injecting in this state and sealing with an adhesive. Thereafter, the sealed liquid crystal can be aligned by slowly cooling the liquid crystal cell to room temperature.
In the liquid crystal dropping method, for example, a sealant is applied to the periphery of the color filter, the color filter is heated to a temperature at which the liquid crystal becomes isotropic, and the liquid crystal is dropped in an isotropic liquid state using a dispenser or the like. Then, the color filter and the counter substrate are overlapped with each other under a reduced pressure, and bonded through a sealant, whereby a liquid crystal layer can be formed. Thereafter, the sealed liquid crystal can be aligned by slowly cooling the liquid crystal cell to room temperature.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
(Synthesis Example 1-1 Production of Graft Copolymer A)
A reactor equipped with a condenser, addition funnel, nitrogen inlet, mechanical stirrer, digital thermometer, caprolactone-modified hydroxyethyl acrylate (“Placcel FA10L (trade name)” manufactured by Daicel Chemical Industries, Ltd .; II) m = 10) 32.1 parts by weight (solid content 70% by weight), dimethylaminoethyl methacrylate (DMAEMA) 2.5 parts by weight, 2-mercaptoethanol 0.25 parts by weight, 50 parts by weight of propylene glycol monomethyl ether acetate (PGMEA) was charged. The mixture was heated to 85 ° C. with stirring, 32.1 parts by weight of Plaxel FA10L, 2.5 parts by weight of DMAEMA, 0.2 parts by weight of α, α′-azobisisobutyronitrile (AIBN), 2 parts by weight, -A mixed solution of 0.25 parts by weight of mercaptoethanol and 50 parts by weight of PGMEA was added dropwise over 1.5 hours, and then a mixed solution of 0.2 parts by weight of AIBN and 20 parts by weight of PGMEA was added dropwise over 30 minutes. After aging at the same temperature for 1 hour, a mixed solution of 0.1 part by weight of AIBN and 10 parts by weight of PGMEA was added dropwise over 30 minutes, and then aged at the same temperature for 2 hours. The solvent of the obtained graft copolymer solution was evaporated to an evaporator to obtain graft copolymer A. The graft copolymer A thus obtained was confirmed by GPC (gel permeation chromatography) under the conditions of N-methylpyrrolidone, 0.01 mol / L lithium bromide added / polystyrene standard. The weight average molecular weight Mw: 11069, the number average molecular weight Mn: 4760, and the molecular weight distribution Mw / Mn was 2.32.

(Synthesis Example 1-2 Preparation of Salt-type Graft Copolymer Solution A)
In a 100 mL round bottom flask, 2.476 parts by weight of graft copolymer A was dissolved in 10.8 parts by weight of diethylene glycol monobutyl ether acetate (BCA), and phenylphosphinic acid (Tokyo Kasei Co., Ltd.) as a salt forming component was dissolved. 0.224 parts by weight (1.0 equivalent to the DMAEA unit of the graft copolymer) was added, and the mixture was stirred at a reaction temperature of 40 ° C. for 2 hours to give a salt-type graft copolymer having a solid content of 20% by weight. Solution A was prepared.

(Synthesis Example 2-1 Production of Graft Copolymer B)
In Synthesis Example 1-1, caprolactone-modified hydroxyethyl acrylate (“PLAXEL FA10L (trade name)” manufactured by Daicel Chemical Industries, Ltd .; m = 10 of the structural unit represented by the general formula (II)) 32.1 parts by weight Instead of using (solid content 70% by weight), caprolactone-modified hydroxyethyl acrylate ("Placcel FM5 (trade name)" manufactured by Daicel Chemical Industries, Ltd .; m = 5 of the structural unit represented by the general formula (II)) A graft copolymer B was obtained in the same manner as in Synthesis Example 1-1 except that 32.1 parts by weight (solid content: 70% by weight) was used. The graft copolymer B thus obtained was confirmed by GPC (gel permeation chromatography) under the conditions of N-methylpyrrolidone, 0.01 mol / L lithium bromide added / polystyrene standard. The weight average molecular weight Mw: 22612, the number average molecular weight Mn: 12268, and the molecular weight distribution Mw / Mn was 1.84.

(Synthesis Example 2-2 Preparation of Salt-type Graft Copolymer Solution B)
In Synthesis Example 1-2, Synthetic Example 1 was used except that 2.476 parts by weight of graft copolymer B produced in Synthesis Example 2-1 was used instead of 2.476 parts by weight of graft copolymer A. In the same manner as in No. 2, a salt-type graft copolymer solution B having a solid content of 20% by weight was prepared.

(Comparative Synthesis Example 1-1 Production of polymerizable oligomer)
A mixed solution of 100.0 parts by weight of methyl methacrylate and 3.6 parts by weight of thioglycolic acid was heated to a temperature of 80 ° C. while stirring under a nitrogen stream. α, α'-Azobisisobutyronitrile (abbreviation AIBN) 0.13 parts by weight was added and reacted for 2 hours, and further 30 parts by weight of THF was added and reacted for 3 hours. After cooling, 200 parts by weight of xylene, 12.0 parts by weight of glycidyl methacrylate, 0.13 part by weight of N, N-dimethyldodecylamine and 0.1 part by weight of hydroquinone were added and stirred at 150 ° C. for 3 hours. After cooling, the reaction solution was precipitated in 3000 parts by weight of methanol, the supernatant was removed by centrifugation, and vacuum dried to obtain 90 parts by weight of a viscous liquid.
The obtained polymerizable oligomer B was confirmed by GPC (gel permeation chromatography) under the conditions of N-methylpyrrolidone, 0.01 mol / L lithium bromide added / polystyrene standard, and the weight average molecular weight (Mw 4030, number average molecular weight (Mn) 2060, molecular weight distribution (Mw / Mn) was 1.96.

(Comparative Synthesis Example 1-2 Production of Graft Copolymer C)
4. A reactor equipped with a condenser, addition funnel, nitrogen inlet, mechanical stirrer, digital thermometer, 20 parts by weight of polymerizable oligomer (polymethyl methacrylate macromonomer), dimethylaminoethyl methacrylate (DMAEMA) 0 part by weight, 0.25 part by weight of 2-mercaptoethanol, and 50 parts by weight of propylene glycol monomethyl ether acetate (PGMEA) were charged. This mixture was heated to 80 ° C. with stirring, 20 parts by mass of polymerizable oligomer, 5 parts by mass of DMAEMA, 0.2 part by weight of α, α′-azobisisobutyronitrile (AIBN), 2-mercaptoethanol 0 A liquid mixture of .25 parts by weight and 50 parts by weight of PGMEA was dropped over 1.5 hours, and then a liquid mixture of 0.2 parts by weight of AIBN and 20 parts by weight of PGMEA was dropped over 30 minutes. After aging at the same temperature for 1 hour, a mixed solution of 0.1 parts by weight of AIBN and 10 parts by weight of PGMEA was added dropwise over 30 minutes, and then the mixture was aged at the same temperature for 2 hours. The obtained graft copolymer solution was reprecipitated in hexane, purified by filtration and vacuum drying, and a graft copolymer C was obtained. The graft copolymer C thus obtained was confirmed by GPC (gel permeation chromatography) under the conditions of N-methylpyrrolidone, 0.01 mol / L lithium bromide added / polystyrene standard. Weight average molecular weight Mw: 11150, number average molecular weight Mn: 5440, molecular weight distribution Mw / Mn was 2.06.

(Comparative Synthesis Example 1-3 Preparation of Salt Graft Copolymer Solution C)
In Synthesis Example 1-2, Synthetic Example 1 was used except that 2.476 parts by weight of Graft Copolymer C produced in Comparative Synthesis Example 1-2 was used instead of 2.476 parts by weight of Graft Copolymer A. In the same manner as -2, a salt-type graft copolymer solution C having a solid content of 20% by weight was prepared.

(Production Examples 1 and 2 Preparation of pigment dispersion)
In accordance with Table 1, each pigment, pigment dispersant, solvent, and 30 parts by weight of 2.0 mm zirconia beads are placed in a mayonnaise bin, shaken for 1 hour in a paint shaker (manufactured by Asada Tekko Co., Ltd.) as a preliminary crushing, and then After removing the zirconia beads, 60 parts by weight of zirconia beads having a particle size of 0.1 mm were put into a mayonnaise bin, and similarly dispersed for 5 hours using a paint shaker as the main crushing to prepare green pigment dispersions 1 and 2.

(Production Example 3 Preparation of Curable Transparent Resin Composition)
A polyfunctional epoxy compound, a binder epoxy resin, a curing agent, and a solvent were mixed and dissolved at a blending amount shown in Table 2 until uniform, to obtain a curable transparent resin composition.

Example 1 Preparation of Thermosetting Resin Composition for Inkjet Color Filter
By mixing the green pigment dispersion 1 shown in Table 3 with the transparent curable resin composition and the solvent until uniform and further filtering with a pressure filtration device having a mesh size of 0.2 μm, an inkjet A thermosetting resin composition 1 for a color filter (IJCF) was obtained.

Example 2 Preparation of Thermosetting Resin Composition for Inkjet Color Filter
In Example 1, a thermosetting resin composition 2 for inkjet color filter (IJCF) was obtained in the same manner as in Example 1 except that the green pigment dispersion 2 was used instead of the green pigment dispersion 1. It was.

(Comparative Example 1 Preparation of Thermosetting Resin Composition for Comparative IJCF)
Green pigment dispersion 3 (Table 4) prepared in the same manner as in Example 1 except that the salt-type graft copolymer solution A of the dispersant in Table 1 was changed to the salt-type graft copolymer solution C, and The transparent curable resin composition (Table 2) obtained in Production Example 3 and the solvent are mixed until uniform, and further filtered through a pressure filtration device having a mesh size of 0.2 μm, thereby providing an inkjet color filter. Thermosetting resin composition 3 (Table 5) was obtained.

  As described above, with respect to the thermosetting resin compositions for inkjet color filters obtained in Examples and Comparative Examples, evaluation substrates were prepared and pixel shapes were evaluated by the following method. Table 6 shows the pixel shape evaluation results of the thermosetting resin composition for inkjet color filters.

<Evaluation substrate manufacturing method>
A 10 mm × 10 mm glass substrate (“NA35” manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm, which is used as a color filter glass material, is prepared, and resin is transferred onto the glass substrate by a thermal transfer method. A color filter substrate was prepared by forming a black matrix. At this time, the black matrix was formed so that the opening was 225 μm × 70 μm and the line width of the light shielding portion was 14 μm. At this time, the thickness of the light shielding portion was set to an average of 2.0 μm.
By applying a plasma treatment using a fluorine compound as an introduction gas to the color filter substrate, the surface of the black matrix was made lyophobic and the other region (colored layer forming region) was made lyophilic.
Ink jet ink was attached to the colored layer forming region partitioned by the black matrix (BM) of the substrate by an ink jet method.
Then, it dried under reduced pressure and prebaked for 60 minutes on a 90 degreeC hotplate further. Then, it post-baked by heating at 240 degreeC for 40 minute (s) in clean oven, and formed the pixel pattern of 1.85 micrometers as an average film thickness after drying hardening on a board | substrate. The average film thickness of the colored layer forming region (one pixel) is determined using the thickness distribution of the colored layer using a non-contact three-dimensional surface shape / roughness measuring device (product name: New View 6000, manufactured by Zygo Corporation). The frequency of the film height in all areas was measured and calculated.

<Pixel shape evaluation method>
Using the non-contact three-dimensional surface shape / roughness measuring device (product name New View 6000, manufactured by Zygo Co., Ltd.), the thickness distribution of the colored layer for one pixel is measured and the T-B difference ( The difference between the thickest part (T) and the thinnest part (B) in the thickness of the colored layer was determined. In addition, the film thickness distribution measurement of the colored layer including the BM portion is performed for one pixel, the average height is obtained, and the relative height of the BM portion based on the average height, the average height is used as a reference. The relative height of the thickest part (T) of the colored layer was determined. The absolute height of T is calculated using the relative height of the BM part, the relative height of T, and the film thickness of the BM, and the difference of the colored layer is calculated by subtracting the TB difference from the absolute height of T. The absolute height of the thinnest part (B) was calculated.

  As shown in Table 6, when comparing the examples and comparative examples having no structural unit represented by the general formula (II), the thermosetting resin composition for inkjet color filters of the present invention was obtained. As a result, it was found that the height of the thinned portion (B) of the colored layer is increased, the TB difference of the colored layer is reduced, and the pixel shape is flattened. Among them, in Example 1 in which m is 10 in the structural unit represented by the general formula (II), the height of the thickest part (T) of the colored layer is further reduced, and the highest of the colored layer. It was found that the height of the thin portion (B) is increased, so that the T-B difference of the colored layer is further reduced and the pixel shape is flattened.

  The thermosetting resin composition for a color filter of the present invention can form a colored layer with high flatness even by an ink jet method, can improve optical performance, and has a good quality color filter and a liquid crystal display device having the same Can be provided.

DESCRIPTION OF SYMBOLS 1 Transparent substrate 2 Light-shielding part 3 Colored layer 10 Color filter 20 Opposite substrate 30 Liquid crystal layer 40 Liquid crystal display device 51 Nitrogen-containing monomer unit 52 Polymerizable group part of polymerizable oligomer 53 Polymer chain by polymerizable oligomer 54 Organic acid compound

Claims (7)

A thermosetting resin composition for a color filter having (A) a pigment dispersant, (B) a pigment, (C) a thermosetting binder, and (D) a solvent, wherein the (A) pigment dispersant Is a polymer comprising a nitrogen-containing monomer represented by the following general formula (I), a polymer chain containing a structural unit represented by the following general formula (II), and a group having an ethylenically unsaturated double bond at its terminal A graft copolymer in which 50 to 95 wt% of the polymerizable oligomer is contained as a copolymerization component, and the amino group contained in the nitrogen-containing monomer and the following general formula (III) ) And / or a graft copolymer in which a salt is formed with an organic acid compound represented by the following general formula (IV): a thermosetting resin composition for a color filter.

[In the formulas (I) to (IV), R ¹ is a hydrogen atom or a methyl group, R ² and R ^{2 ′} are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and A is each independently a carbon atom. An alkylene group of 1 to 8, — [CH (R ⁶ ) —CH (R ⁷ ) —O] _x —CH (R ⁶ ) —CH (R ⁷ ) — or — [(CH ₂ ) _y —O] _z It is a divalent group represented by — (CH ₂ ) _y —.
R ³ and R ^{3 ′} are each independently a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH ( R ¹⁰ ) —O] _a —R ⁸ , — [(CH ₂ ) _b —O] _c —R ⁸ , or a monovalent group represented by —O—R ^{3 ″} , R ³ and R ^{3 ′} Any of which contains a carbon atom. R ^{3 ″} represents an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ^8. Or a monovalent group represented by — [(CH ₂ ) _b —O] _c —R ⁸ .
R ⁴ represents an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ⁸ , — [(CH ₂ ) _b —O] _c —R ⁸ or a monovalent group represented by —O—R ^{4 ′} . R ^{4 ′} is an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ⁸ , — [(CH ₂ ) _b —O] _c is a monovalent group represented by R ⁸ .
R ^{6, R} 7, ^{R 9} and ^{R 10} are each independently a hydrogen atom or a methyl group, ^{R 8} is a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, An aralkyl group, an aryl group, —CHO, —CH ₂ CHO, —CO—CH═CH ₂ , —CO—C (CH ₃ ) ═CH _2, or a monovalent group represented by —CH ₂ COOR ¹¹ , R ¹¹ is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
In R ³ , R ^{3 ′} , R ^{3 ″} , R ⁴ , R ^{4 ′} and R ⁸ , each of the alkyl group, alkenyl group, aralkyl group and aryl group may have a substituent.
l represents an integer of 1 to 5, and m represents an integer of 5 or more.
x and a are integers of 1 to 18, y and b are integers of 1 to 5, and z and c are integers of 1 to 18. ]   The thermosetting resin for a color filter according to claim 1, wherein the group having the ethylenically unsaturated double bond of the polymerizable oligomer is a (meth) acryloyl group, a vinyl group, or an allyl group. Composition. Formula ^R 3 in (III), R ^{3 'and} / or R ^3'', and / or the general formula (IV) in ^{R 4} and / or R ^4', independently methyl, ethyl , An aralkyl group, an aryl group, a vinyl group, an allyl group, or — [CH (R ⁹ ) —CH (R ¹⁰ ) —O] _a —R ⁸ or — [(CH ₂ ) _b —O] _c —R ⁸ , and the and, ^{R 8} is -CO-CH = CH ₂ or _{-CO-C (CH} 3) = color thermosetting resin composition for filter according to claim 1 or 2, characterized in that a CH ₂ object.   The thermosetting resin composition for a color filter according to claim 1, wherein the (A) pigment has an average particle size of 10 to 100 nm.   A color filter comprising at least a transparent substrate and a colored layer provided on the transparent substrate, wherein at least one of the colored layers is a thermosetting resin composition for a color filter according to any one of claims 1 to 4. A color filter comprising a colored layer formed using a product. A step of selectively attaching the thermosetting resin composition for a color filter according to any one of claims 1 to 4 by an ink jet method to form an ink layer;
And a step of forming a colored layer by curing the ink layer.   A liquid crystal display device comprising the color filter according to claim 5 or the color filter manufactured by the method for manufacturing a color filter according to claim 6.

Images