JP6135282B2 - Color material, color material dispersion, colored resin composition for color filter, color filter, liquid crystal display device, and organic light emitting display device - Google Patents

Description

  The present invention relates to a color material, a color material dispersion, a colored resin composition for a color filter, a color filter, a liquid crystal display device, and an organic light emitting display device.

Many thin image display devices represented by displays and the like, so-called flat panel displays, have been put on the market, characterized by being thinner than a cathode ray tube type display and taking up little space in the depth direction. The market price has become affordable year by year with the evolution of production technology, the demand has further expanded, and the production volume has been increasing year by year. In particular, color LCD TVs have almost reached the mainstream of TV. Recently, an organic light-emitting display device such as an organic EL display having high visibility due to self-emission has been attracting attention as a next-generation image display device. In the performance of these image display devices, further improvement in image quality such as improvement in contrast and color reproducibility and reduction in power consumption are strongly desired.
Color filters are used in these liquid crystal display devices and organic light emitting display devices. For example, in the case of a color liquid crystal display, a backlight is used as a light source, the amount of light is controlled by electrically driving the liquid crystal, and color expression is performed by the light passing through a color filter. Therefore, a color filter must be present in the color representation of a liquid crystal television and plays a major role in determining the performance of the display. In the organic light emitting display device, when a color filter is used for the white light emitting organic light emitting element, a color image is formed as in the liquid crystal display device.

As a recent trend, there is a demand for power saving of an image display device, and in order to improve the utilization efficiency of a backlight, a high brightness of a color filter is particularly demanded. This is a big problem especially for mobile displays (cell phones, smartphones, tablet PCs).
Although the battery capacity has increased due to technological evolution, the amount of power stored in the mobile is still limited, while the power consumption tends to increase as the screen size increases. An image display device including a color filter affects the design and performance of a mobile terminal in order to be directly linked to the usable time and charging frequency of the mobile terminal.

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

  As one means for achieving high brightness, a colored resin composition for a color filter using a dye has been studied. Dyes generally have higher transmittance than pigments and can produce high-intensity color filters, but heat resistance and light resistance are poor, and chromaticity is likely to change during high-temperature heating in the color filter production process. There was a problem. Moreover, the colored resin composition using a dye has a problem that foreign matters are likely to precipitate during the drying process. When foreign matter is deposited on the coating film, the contrast is remarkably deteriorated and it is difficult to use it as a colored layer.

As a technique for improving various resistances of dyes, a technique for lake-forming or salt-forming dyes is known.
Patent Document 1 describes a colored photosensitive composition containing a dyed lake pigment obtained by coloring an extender pigment with a water-soluble dye and raked it with a precipitant. According to Patent Document 1, by using the dyed lake pigment, the colored photosensitive composition is excellent in heat resistance, light resistance, color characteristics, transparency, and dispersion stability.

  Patent Document 2 discloses a coloring composition for a color filter, which includes a pigment carrier made of a transparent resin, a precursor thereof, or a mixture thereof, and a rhodamine-based metal lake pigment raked using a complex acid containing phosphorus. The complex acid includes phosphorus, tungsten, molybdic acid and the like. According to Patent Document 2, a rhodamine dye metal lake pigment using a complex acid containing phosphorus is used to form a red filter segment and a magenta color filter segment, and has excellent transparency and wide color reproduction. It has an area and is excellent in heat resistance, light resistance and solvent resistance. Further, Patent Document 2 describes that molybdenum in the complex acid contributes to stabilizing the coloration and increasing the concentration of the pigment, and tungsten improves the permeability of the pigment.

  Patent Document 3 describes a coloring composition for a color filter including a salt formation product composed of a basic dye and a counter compound which is an anionic component, and uses a triarylmethane basic dye as a cation component, It is described that a xanthene acid dye is used as an anionic component. According to Patent Document 3, by using the salt-formation product as a colorant, the brightness is higher than when a conventional pigment is used, and the resistance is improved as compared with the case where a conventional dye is used. Have been described.

  In Patent Document 4, the inventors disclosed a color filter using a specific color material containing a divalent or higher cation in which a plurality of dye skeletons are cross-linked by a cross-linking group and a divalent or higher anion. Yes. It is disclosed that the color material has excellent heat resistance, and a color filter using the color material has high contrast, excellent solvent resistance, and electrical reliability.

JP 2001-81348 A JP 2010-191304 A International Publication No. 2011/037195 Pamphlet International Publication No. 2012/144521 Pamphlet

  The present inventors have studied to use the color material described in Patent Document 4 because it has excellent heat resistance and high brightness can be expected. However, in order to adjust to a desired color tone, it is necessary to use other color materials in combination. When using a dioxazine-based pigment that has been conventionally used as another color material, the luminance decreases due to the low transmittance of the pigment, and when a dye is used as the other color material, heat resistance and There was a problem that the light resistance deteriorated and as a result the luminance decreased. Further, when a metal lake pigment is used as another color material, although the heat resistance is improved as compared with the dye, the heat resistance is still insufficient, resulting in a problem that the luminance is lowered.

  The present invention has been made in view of the above circumstances, and is adjusted to a desired color tone, a colorant and a colorant dispersion liquid that are excellent in heat resistance and capable of forming a high-brightness coating film while being adjusted to a desired color tone. Color resin composition for color filter which is excellent in heat resistance and capable of forming a high brightness colored layer, high brightness color filter using the color resin composition, liquid crystal display device having the color filter, and organic light emitting display device The purpose is to provide.

  The color material according to the present invention is a color material composed of a double salt represented by the following general formula (I).

(In general formula (I), A is an a-valent organic group in which the carbon atom directly bonded to N has no π bond, and the organic group is saturated aliphatic carbonized at least at the terminal directly bonded to N. It represents an aliphatic hydrocarbon group having a hydrogen group or an aromatic group having the aliphatic hydrocarbon group, and O, S, and N may be contained in the carbon chain, and R ^{1 to} R ⁵ are each independent. Represents a hydrogen atom, an alkyl group which may have a substituent or an aryl group which may have a substituent, and R ² and R ³ , R ⁴ and R ⁵ are bonded to form a ring structure. which may be .Ar ¹ may be different even each represents. plurality of R ¹ to R ⁵ and Ar ¹ an aromatic group which may have a substituent the same.
a and c represent a number of 2 or more, and b and d represent a number of 1 or more. e is 0 or 1, and when e is 0, there is no bond. A plurality of e may be the same or different.
B ^c- represents a c-valent polyacid anion.
R ^{6 to} R ⁹ each independently represent a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, and R ⁶ and R ⁷ , R ⁸ and R ⁹ are They may combine to form a ring structure. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent. Y represents a —COOZ group or a —NR ¹⁰ R ^{10 ′} group, and Z represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, or a substituent. Represents an aralkyl group which may have a group, and R ¹⁰ and R ^{10 ′} each independently represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent. R ¹⁰ and R ^{10 ′} may combine to form a ring structure.
f is 0 or 1, and when f is 0, there is no bond. g and h represent a number of 1 or more. )

The color material dispersion according to the present invention contains (A) a color material, (B) a dispersant, and (C) a solvent.
The (A) color material contains a color material composed of a double salt represented by the general formula (I).
Moreover, the colored resin composition for a color filter according to the present invention contains (A) a color material, (B) a dispersant, (C) a solvent, and (D) a binder component. The material contains a color material composed of a double salt represented by the general formula (I).

  In the coloring material, the coloring material dispersion, and the colored resin composition for a color filter of the present invention, the polyacid anion in the coloring material represented by the general formula (I) is a polyacid anion containing at least tungsten. And it is preferable from a heat resistant point that the molar ratio of tungsten to molybdenum in the polyacid anion is 100: 0 to 85:15.

  The color filter according to the present invention is a color filter comprising at least a transparent substrate and a colored layer provided on the transparent substrate, and at least one of the colored layers is a colored resin composition for a color filter according to the present invention. It has a colored layer formed by curing a product.

The present invention provides a liquid crystal display device comprising the color filter according to the present invention, a counter substrate, and a liquid crystal layer formed between the color filter and the counter substrate.
In addition, the present invention provides an organic light emitting display device comprising the color filter according to the present invention and an organic light emitter.

  According to the present invention, a color material that is excellent in heat resistance while adjusting to a desired color tone and can form a high-brightness coating film, and can be formed into a coating film with excellent heat resistance and high-brightness while adjusting to a desired color tone. Colorant dispersion, color resin composition for color filter that is excellent in heat resistance while adjusting to a desired color tone and can form a high-brightness colored layer, high-brightness color filter using the colored resin composition, A liquid crystal display device and an organic light emitting display device having a color filter can be provided.

FIG. 1 is a schematic cross-sectional view showing an example of the color filter of the present invention. FIG. 2 is a schematic cross-sectional view showing an example of the liquid crystal display device of the present invention. FIG. 3 is a schematic cross-sectional view showing an example of the organic light emitting display device of the present invention. FIG. 4 is a schematic diagram showing a molecular association state of a coloring material composed of a double salt represented by the general formula (I). FIG. 5 is a schematic diagram showing ionic bonds of a conventional metal lake pigment. FIG. 6 is a schematic view showing the ionic bond of the salt formation product of Patent Document 3. FIG. 7 is a schematic diagram showing ionic bonds of the salt formation product of Patent Document 4.

Hereinafter, the color material, the color material dispersion, the color resin composition for color filter, the color filter, the liquid crystal display device, and the organic light emitting display device according to the present invention will be described in order.
In the present invention, light includes electromagnetic waves having wavelengths in the visible and invisible regions, and further includes radiation, and the radiation includes, for example, microwaves and electron beams. Specifically, it means an electromagnetic wave having a wavelength of 5 μm or less and an electron beam.
In the present invention, (meth) acryl represents each of acryl and methacryl, and (meth) acrylate represents each of acrylate and methacrylate.
In the present invention, the organic group means a group having one or more carbon atoms.

1. Colorant The colorant according to the present invention is a colorant composed of a double salt represented by the following general formula (I).

(In general formula (I), A is an a-valent organic group in which the carbon atom directly bonded to N has no π bond, and the organic group is saturated aliphatic carbonized at least at the terminal directly bonded to N. It represents an aliphatic hydrocarbon group having a hydrogen group or an aromatic group having the aliphatic hydrocarbon group, and O, S, and N may be contained in the carbon chain, and R ^{1 to} R ⁵ are each independent. Represents a hydrogen atom, an alkyl group which may have a substituent or an aryl group which may have a substituent, and R ² and R ³ , R ⁴ and R ⁵ are bonded to form a ring structure. which may be .Ar ¹ may be different even each represents. plurality of R ¹ to R ⁵ and Ar ¹ an aromatic group which may have a substituent the same.
a and c represent a number of 2 or more, and b and d represent a number of 1 or more. e is 0 or 1, and when e is 0, there is no bond. A plurality of e may be the same or different.
B ^c- represents a c-valent polyacid anion.
R ^{6 to} R ⁹ each independently represent a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, and R ⁶ and R ⁷ , R ⁸ and R ⁹ are They may combine to form a ring structure. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent. Y represents a —COOZ group or a —NR ¹⁰ R ^{10 ′} group, and Z represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, or a substituent. Represents an aralkyl group which may have a group, and R ¹⁰ and R ^{10 ′} each independently represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent. R ¹⁰ and R ^{10 ′} may combine to form a ring structure.
f is 0 or 1, and when f is 0, there is no bond. g and h represent a number of 1 or more. )

The colorant composed of the double salt represented by the general formula (I) of the present invention has a divalent structure in which a plurality of dye skeletons represented by the general formula (I-1) are crosslinked by a crosslinking group A as a cation. It is adjusted to a desired color tone by being a double salt containing the above cation and the monovalent cation represented by the general formula (I-2) and using a diacid or higher polyacid anion as the anion. However, it becomes particularly excellent in heat resistance. The reason is estimated as follows.
Conventionally, as an attempt to improve heat resistance while adjusting to a desired color tone, for example, in Patent Document 3, a salt-formation product is formed with a basic dye and an acid dye. However, in this method, as shown in FIG. 6, although the monovalent cation 201 and the monovalent anion 202 can be ionically bonded to form the salt 203, the heat resistance is improved as compared with the dye alone, Since both the cation and the anion are composed of organic component dyes, sufficient heat resistance could not be obtained.
Further, in Patent Document 4, an acid such as a xanthene dye is used as a divalent or higher cation in which a plurality of triarylmethane dye skeletons are cross-linked by a crosslinkable group and a divalent or higher anion that forms a salt with the cation. It describes that a dye skeleton may be used. In this method, as shown in FIG. 7, a molecular aggregate 206 can be formed by forming a salt using a divalent or higher cation 204 and a divalent or higher anion 205. Therefore, although the molecular weight is larger than the salt-formation product containing a monovalent cation or anion as in Patent Document 3 and the heat resistance is improved, both the cation and the anion are composed of organic component dyes in this case as well. In some cases, heat resistance is insufficient, and higher heat resistance has been demanded.

On the other hand, FIG. 4 is a schematic diagram showing a molecular association state of a color material composed of a double salt represented by the general formula (I) of the present invention. In FIG. 4, a divalent cation in which two dye skeletons are crosslinked by a crosslinking group A as a divalent or higher cation in which a plurality of dye skeletons represented by the general formula (I-1) are crosslinked by a crosslinking group A. Cation 101, monovalent cation 102 as monovalent or higher cation represented by general formula (I-2), and trivalent anion 103 as divalent or higher polyacid anion in general formula (I). The case will be described as an example.
When both the anion and the cation are divalent or higher ions, the anion and the cation are not simply bonded one molecule to one molecule in the aggregate of the coloring material, but the divalent cation 101 of FIG. Like the trivalent anion 103, it is presumed to form a molecular aggregate 110 in which a plurality of molecules are associated through continuous ionic bonds. Here, by using the polyacid anion 103, which is an inorganic anion, as the divalent or higher anion, the connection part of the molecular aggregate becomes strong. In the present invention, a monovalent cation 102 is incorporated into this molecular aggregate network so as to form a double salt, whereby a monovalent cation 101 and a polyacid anion 103 as shown in FIG. As compared with the case where the metal lake pigment 112 of the cation 102 and the polyacid anion 103 is used in combination, the heat resistance is improved. Even when the dye comprising the monovalent cation 102 is a metal lake pigment 112 with the polyacid anion 103, a molecular aggregate cannot be formed as shown in FIG. Heat resistance is likely to be inferior. On the other hand, in the present invention, a dye composed of a monovalent cation is used as a part of the molecular aggregate composed of the double salt, so that the molecular aggregate including the monovalent cation is 1 in the aggregate of the coloring material. Since it behaves like two molecules, the apparent molecular weight of the color material is remarkably increased compared to the molecular weight of the conventional metal lake pigment 112, and the heat resistance of the entire color material is estimated to be high. In addition, the formation of the molecular aggregate 110 increases the cohesive force in the solid state, lowers the motion due to heat, and further stabilizes electrically. Therefore, it is estimated that the dissociation of the ion pair and the decomposition of the cation part can be suppressed. Is done. As a result, it is estimated that heat resistance is improved.
As described above, a dye composed of a monovalent cation is obtained by appropriately selecting a dye for adjusting to a desired color tone and using a combination of the divalent cation 101 and the monovalent cation 102 to form a double salt. Even if it is used, it can be made excellent in heat resistance.
Hereinafter, the color material represented by the general formula (I) will be described.

<Cation Represented by General Formula (I-1)>
In the divalent or higher cation in which a plurality of dye skeletons represented by the general formula (I-1) are cross-linked by the cross-linking group A, the hydrocarbon of the linking group A directly bonded to the cationic coloring site has a π bond. Therefore, the color characteristics such as the color tone and transmittance of the cationic coloring portion hardly change before and after the introduction of the linking group A.
In a divalent or higher cation in which a plurality of dye skeletons represented by the general formula (I-1) are crosslinked by a crosslinking group A, e is an integer of 0 or 1. When e is 0, it has a triarylmethane skeleton represented by the following general formula (I-1 ′).

(In General Formula (I-1 ′), R ^{1 to} R ⁵ and Ar ¹ are the same as those in Formula (I).)

  Further, when e is 1, it has a xanthene skeleton represented by the following general formula (I-1 ″).

(In General Formula (I-1 ″), R ^{1 to} R ⁵ and Ar ¹ are the same as those in Formula (I).)

  A plurality of e may be the same or different. That is, for example, it may be a cation moiety having only a triarylmethane skeleton or a plurality of xanthene skeletons, or may be a cation moiety containing both a triarylmethane skeleton and a xanthene skeleton in one molecule. From the viewpoint of color purity, a cation moiety having only the same skeleton is preferable.

A in the general formula (I) is an a-valent organic group in which the carbon atom directly bonded to N (nitrogen atom) does not have a π bond, and the organic group is saturated at least at the terminal directly bonded to N. Represents an aliphatic hydrocarbon group having an aromatic hydrocarbon group, or an aromatic group having the aliphatic hydrocarbon group, and includes O (oxygen atom), S (sulfur atom), and N (nitrogen atom) in the carbon chain It may be. Since the carbon atom directly bonded to N does not have a π bond, the color characteristics such as the color tone and transmittance of the cationic coloring portion are not affected by the linking group A and other coloring portions, Similar colors can be retained.
In A, an aliphatic hydrocarbon group having a saturated aliphatic hydrocarbon group at the terminal directly bonded to N is linear, branched or cyclic unless the terminal carbon atom directly bonded to N has a π bond. The carbon atom other than the terminal may have an unsaturated bond, may have a substituent, and the carbon chain contains O, S, and N. Also good. For example, a carbonyl group, a carboxy group, an oxycarbonyl group, an amide group or the like may be contained, and a hydrogen atom may be further substituted with a halogen atom or the like.
The aromatic group having an aliphatic hydrocarbon group in A is a monocyclic or polycyclic aromatic group having an aliphatic hydrocarbon group having a saturated aliphatic hydrocarbon group at the terminal directly bonded to N. And may have a substituent, and may be a heterocyclic ring containing O, S, and N.
Especially, it is preferable that A contains a cyclic | annular aliphatic hydrocarbon group or an aromatic group from the point of the robustness of frame | skeleton.
Among the cyclic aliphatic hydrocarbon groups, a bridged alicyclic hydrocarbon group is preferable from the viewpoint of skeleton fastness. The bridged alicyclic hydrocarbon group means a polycyclic aliphatic hydrocarbon group having a bridged structure in the aliphatic ring and having a polycyclic structure, for example, norbornane, bicyclo [2,2,2]. Examples include octane and adamantane. Among the bridged alicyclic hydrocarbon groups, norbornane is preferable. Moreover, as an aromatic group, the group containing a benzene ring and a naphthalene ring is mentioned, for example, Among these, the group containing a benzene ring is preferable. For example, when A is a divalent organic group, an aromatic group in which two linear, branched, or cyclic alkylene groups having 1 to 20 carbon atoms or two alkylene groups having 1 to 20 carbon atoms such as xylylene groups are substituted Family groups and the like.

  The valence a in A is the number of chromogenic cation sites constituting the cation, and a is a number of 2 or more. In the coloring material of the present invention, since the valence a of the cation is 2 or more and the valence of the anion is 2 or more, the above-described molecular aggregate is formed, and the heat resistance is improved. The upper limit of a is not particularly limited, but a is preferably 4 or less, and more preferably 3 or less, from the viewpoint of ease of production.

The alkyl group in R ^{1 to} R ⁵ is not particularly limited. For example, a linear or branched alkyl group having 1 to 20 carbon atoms is exemplified, among which a linear or branched alkyl group having 1 to 8 carbon atoms is preferable, and the number of carbon atoms is 1 to 8. The linear or branched alkyl group of 5 is more preferable from the viewpoints of luminance and heat resistance. Especially, it is especially preferable that the alkyl group in R < ¹ > -R < ⁵ > is an ethyl group or a methyl group. The substituent that the alkyl group may have is not particularly limited, and examples thereof include an aryl group, a halogen atom, and a hydroxyl group, and examples of the substituted alkyl group include a benzyl group.
The aryl group in R ^{1 to} R ⁵ is not particularly limited. For example, a phenyl group, a naphthyl group, etc. are mentioned. Examples of the substituent that the aryl group may have include an alkyl group and a halogen atom.

R ² and R ³ , R ⁴ and R ⁵ are combined to form a ring structure. R ² and R ³ , R ⁴ and R ⁵ form a ring structure through a nitrogen atom. Say. The ring structure is not particularly limited, and examples thereof include a pyrrolidine ring, a piperidine ring, and a morpholine ring.

Among them, from the viewpoint of chemical stability, R ^{1 to} R ⁵ are each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a phenyl group, or R ² and R ³ , R ⁴ and R ^5. It is preferable that they are bonded to form a pyrrolidine ring, a piperidine ring, or a morpholine ring.

R ^{1 to} R ⁵ can each independently have the above structure. Among them, R ¹ is preferably a hydrogen atom from the viewpoint of color purity, and R ² to R ² are preferably from the viewpoint of ease of production and raw material procurement. More preferably, all R ⁵ are the same.

The divalent aromatic group in Ar ¹ is not particularly limited. As the aromatic group for Ar ^1, the same aromatic groups as those described for the aromatic group for A can be used.
Ar ¹ is preferably an aromatic group having 6 to 20 carbon atoms, and more preferably an aromatic group composed of a condensed polycyclic carbocycle having 10 to 14 carbon atoms. Among these, a phenylene group or a naphthylene group is more preferable because the structure is simple and the raw material is inexpensive.

A plurality of R ^{1 to} R ⁵ and Ar ¹ in one molecule may be the same or different. A desired color can be adjusted by a combination of R ^{1 to} R ⁵ and Ar ¹ .

<Cation Represented by General Formula (I-2)>
In the cation represented by the general formula (I-2), f is an integer of 0 or 1. When f is 0, it has a triarylmethane skeleton similarly to general formula (I-1 ′), and when f is 1, it has a xanthene skeleton similarly to general formula (I-1 ″).

Examples of the alkyl group in R ^{6 to} R ⁹ include a linear or branched alkyl group having 1 to 12 carbon atoms, and among them, a linear or branched alkyl group having 1 to 8 carbon atoms. It is preferable that it is a linear or branched alkyl group having 1 to 5 carbon atoms from the viewpoint of luminance and heat resistance. Especially, it is especially preferable that the alkyl group in R < ⁶ > -R < ⁹ > is an ethyl group or a methyl group. The substituent that the alkyl group may have is not particularly limited, and examples thereof include an aryl group, a halogen atom, and a hydroxyl group, and examples of the substituted alkyl group include a benzyl group.
Examples of the aryl group in R ^{6 to} R ⁹ include an aryl group having 6 to 12 carbon atoms, and specific examples of the aryl group include a phenyl group and a naphthyl group. Examples of the substituent that the aryl group may have include an alkyl group and a halogen atom.
Examples of the aralkyl group in R ^{6 to} R ⁹ include an aralkyl group having 7 to 16 carbon atoms, and specific examples include a benzyl group, a phenethyl group, a naphthylmethyl group, and a biphenylmethyl group.

R ⁶ and R ⁷ , R ⁸ and R ⁹ are combined to form a ring structure. R ⁶ and R ⁷ , R ⁸ and R ⁹ form a ring structure through a nitrogen atom. Say. The ring structure is not particularly limited, and examples thereof include a pyrrolidine ring, a piperidine ring, and a morpholine ring.

The alkyl group in X ¹ and X ² can be the same as the alkyl group in R ^{6 to} R ⁹ . Moreover, as a halogen atom in X < ¹ > and X < ² >, a fluorine atom, a chlorine atom, and a bromine atom are mentioned.

Y is a -COOZ group (where Z is a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, or an optionally substituted group). An aralkyl group), or a —NR ¹⁰ R ^{10 ′} group (where R ¹⁰ and R ^{10 ′} each independently have a hydrogen atom, an alkyl group which may have a substituent, or a substituent). Represents an aryl group which may be substituted, and R ¹⁰ and R ^{10 ′} may be bonded to form a ring structure.
The alkyl group, aryl group and aralkyl group in Z can be the same as those in R ^{6 to} R ⁹ .
In addition, the alkyl group, aryl group and ring structure in R ¹⁰ and R ^{10 ′} can be the same as those in R ^{6 to} R ⁹ .

In the general formula (I-2), the substitution position of the substituent Y in the benzene ring bonded to the xanthene skeleton is preferably ortho or para with respect to the xanthene skeleton from the viewpoint of stability. When Y is the -COOZ group, the ortho position is particularly preferable, and when Y is the -NR ¹⁰ R ^{10 '} group, the para position is particularly preferable. When the —COOZ group is in the ortho position, it is presumed that a ring structure can be formed by resonating with the carbon atom of the xanthene skeleton to which the benzene ring is bonded, thereby improving heat resistance and light resistance.

  Specific examples of the cation skeleton in formula (I-2) include C.I. I. Basic Red 1 (Rhodamine 6G), C.I. I. Basic Red 1: 1, C.I. I. Basic Red 3, C.I. I. Basic Red 4, C.I. I. Basic Red 8, C.I. I. Basic Red 9, C.I. I. Basic violet 1 (methyl violet), C.I. I. Basic violet 3 (crystal violet), C.I. I. Basic violet 4 (ethyl violet), C.I. I. Basic Violet 10 (Rhodamine B), C.I. I. Basic Violet 11 (Rhodamine 3B), C.I. I. Basic violet 11: 1 (rhodamine A) and the like can be mentioned, and rhodamine 6G, rhodamine A and rhodamine B are preferable from the viewpoint of luminance and heat resistance.

The cation in the general formula (I-2) is usually a monovalent cation. When the cation in the general formula (I-2) is a monovalent cation, the colorant composed of the double salt represented by the general formula (I) of the present invention has a divalent cation 101 and a polyacid anion 103. Compared with the case where a metal lake pigment 112 of a monovalent cation 102 and a polyacid anion 103 is used in combination with the molecular aggregate 111 (see FIG. 5), the dispersed particle size when used as a colorant dispersion is small. Thus, the contrast of the colored resin composition using the color material dispersion is improved. This is because, in the color material comprising the double salt represented by the general formula (I) of the present invention, since the monovalent cation 102 constitutes the end of the molecular aggregate, only the divalent cation 101 is present. It is presumed that the molecular aggregates are suppressed from becoming too large compared to the above, and the dispersibility is excellent.
Further, the metal lake pigment 112 of the monovalent cation 102 of the general formula (I-2) and the polyacid anion 103 tends to leave unreacted dye (monovalent cation) when synthesized, When the colorant comprising the double salt represented by the general formula (I) of the present invention is used, there is an advantage that unreacted dye (monovalent cation) hardly remains during synthesis and the yield is high. In the divalent or higher cation represented by the general formula (I-1) contained in the colorant composed of the double salt represented by the general formula (I) of the present invention, one cation part is a polyacid anion. Since it can be insolubilized by forming a salt, it is presumed that monovalent cations that are simultaneously laked are easily taken into the salt and insolubilized, and that unreacted dye (monovalent cations) hardly remains.

<Polyacid anion>
In the general formula (I), the anion part (B ^c− ) is a c-valent polyacid anion. c is a number of 2 or more, and the anion portion (B ^c− ) is a diacid or higher polyacid. By using a polyacid anion, heat resistance is excellent. The anion portion (B ^c− ) is more preferably a trivalent or higher polyacid anion from the viewpoint of heat resistance. The polyacid is an acid obtained by condensing a plurality of oxo acids.
The polyacid anion may be an isopolyacid ion (M _m O _n ) ^c- or a heteropoly acid ion (X _l M _m O _n ) ^c- . In the above ionic formula, M represents a poly atom, X represents a hetero atom, m represents a composition ratio of poly atoms, and n represents a composition ratio of oxygen atoms. Examples of the poly atom M include Mo, W, V, Ti, and Nb. Examples of the hetero atom X include Si, P, As, S, Fe, and Co. Moreover, a counter cation such as Na ⁺ or H ⁺ may be partially included.
Among these, a polyacid anion containing at least one of tungsten (W) and molybdenum (Mo) is preferable, and a polyacid anion containing at least tungsten is preferable in terms of high brightness and excellent heat resistance and light resistance. From the viewpoint of heat resistance, it is more preferable.

Examples of the polyacid anion containing at least one of tungsten (W) and molybdenum (Mo) include, for example, tungstate ion [W ₁₀ O ₃₂ ] ⁴⁻ and molybdate ion [Mo ₆ O ₁₉ ] ² which are isopolyacids. ^- or a heteropoly acid, ion phosphotungstic acid ^{_{[PW 12 O 40] 3-,}} [P 2 W 18 O 62] 6-, silicotungstic acid ion _{[SiW 12 O} ^{40] 4-,} phosphomolybdic acid ion [ PMo ₁₂ O ₄₀ ] ³⁻ , silicomolybdate ion [SiMo ₁₂ O ₄₀ ] ⁴⁻ , phosphotungsto molybdate ion [PW _12-x Mo _x O ₄₀ ] ³⁻ (x is an integer of 1 to 11), P _{2 W 18-y Mo y O 62} ] 6- (y is 1 to 17 integer), Keita ring strike molybdate [SiW _{1 ^{-X Mo x O 40] 4- (}} x is 1 to 11 integer), and the like. The polyacid anion containing at least one of tungsten (W) and molybdenum (Mo) is preferably a heteropolyacid among the above from the viewpoint of heat resistance and the availability of raw materials, and more preferably P ( More preferred is a heteropolyacid containing phosphorus.

In the polyacid anion which contains at least tungsten (W) and may contain molybdenum, the content ratio of tungsten and molybdenum is not particularly limited. : 0 to 85:15 is preferable, and 100: 0 to 90:10 is more preferable.
The polyacid anion in the colorant represented by the general formula (I) can be used alone or in combination of two or more of the above polyacid anions. It is preferable that the molar ratio of tungsten to molybdenum in the entire acid anion is within the above range.

  In the general formula (I), b is the number of cations represented by the general formula (I-1), g is the number of cations represented by the general formula (I-2), and d and h are The sum represents the number of anions in the molecular aggregate, and b, g, d and h each represent a number of 1 or more. When b and g are each 2 or more, a plurality of cations in the molecular aggregate may be one kind alone, or two or more kinds may be combined. Moreover, when d and h are each 2 or more, the anions present in the molecular aggregate may be one kind alone or two or more kinds may be combined.

  In the manufacturing method of the coloring material which consists of double salt represented by general formula (I), the cation represented by the said general formula (I-1), and the cation represented by the said general formula (I-2) The content ratio is not particularly limited as long as it can be adjusted to a desired color, but from the viewpoint of heat resistance and color tone adjustment, the number of cations c represented by the general formula (I-1) and The ratio (b: g) of several g of the cation represented by the general formula (I-2) is preferably 20:80 to 99: 1, and more preferably 40:60 to 95: 5. preferable.

A method for producing a coloring material comprising a double salt represented by the general formula (I) is prepared by preparing a cation represented by the general formula (I-1) and a cation represented by the general formula (I-2). Then, the cation represented by the general formula (I-1) and the cation represented by the general formula (I-2) can be simultaneously laked with a polyacid anion. The cation represented by the general formula (I-1) can be obtained, for example, by the production method described in International Publication No. 2012/144520 pamphlet.
The colorant composed of the double salt represented by the general formula (I) includes, for example, a cation chloride represented by the general formula (I-1) and a cation represented by the general formula (I-2). And the polyacid anion can be mixed and precipitated in a mixed solvent of water and alcohol.

2. Color material dispersion The color material dispersion according to the present invention contains (A) a color material, (B) a dispersant, and (C) a solvent.
The (A) color material contains a color material composed of a double salt represented by the following general formula (I).

(The symbols in general formula (I) are as described above.)

The color material dispersion according to the present invention is adjusted to a desired color tone by dispersing the color material composed of the double salt represented by the general formula (I) as the color material (A) in the solvent (C). On the other hand, the colorant dispersion is excellent in heat resistance and capable of forming a high-brightness coating film.
As described above, in the color material composed of the double salt represented by the general formula (I), a divalent cation 101 and a monovalent cation 102 are selected by appropriately selecting a dye for adjustment to a desired color tone. By using in combination and making a double salt, heat resistance is excellent while adjusting to a desired color tone. Since the cation of the color material composed of the double salt represented by the general formula (I) has a basic skeleton similar to that of the basic dye at each coloring site, the color material composed of the double salt represented by the general formula (I) Has a high transmittance as with basic dyes. Therefore, high brightness can be realized even after a high temperature heating process in the color filter manufacturing process. The colorant dispersion according to the present invention using the colorant composed of the double salt represented by the general formula (I) can form a coating film with excellent heat resistance and high brightness while adjusting to a desired color tone. It becomes a colorant dispersion.

The color material dispersion of the present invention contains at least (A) a color material, (B) a dispersant, and (C) a solvent, and further contains other components as long as the effects of the present invention are not impaired. It may contain.
Hereinafter, each component of the color material dispersion of the present invention will be described in detail in order.

[(A) Color material]
The color material (A) used in the present invention contains at least a color material composed of a double salt represented by the general formula (I), and further contains other color materials as long as the effects of the present invention are not impaired. You may do it. (A) The color material composed of the double salt represented by the general formula (I) in the color material can be the same as the color material according to the present invention, and the description thereof is omitted here. .

<Other colorants>
(A) The color material may further contain another color material for the purpose of controlling the color tone within a range not impairing the effects of the present invention. Examples of other colorants include known pigments and dyes, and one or more can be selected and used.
As the other color material, the color material described in International Publication No. 2012/144521 pamphlet including a divalent or higher cation represented by the general formula (I-1) and a divalent or higher anion is used. It is preferable. Specific examples of other color materials and the blending amount of other color materials are not particularly limited as long as the effects of the present invention are not impaired, and when used in a colored resin composition for a color filter described later. The same can be said.

The average dispersed particle size of the colorant (A) 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. From the viewpoint of excellent heat resistance, the thickness is preferably in the range of 10 to 160 nm, and more preferably in the range of 20 to 130 nm. (A) Since the average dispersed particle diameter of the color material is in the above range, a liquid crystal display device and an organic light emitting display device manufactured using the colored resin composition for a color filter of the present invention have high contrast and high quality. Can be.
The average dispersed particle size of the (A) color material in the color material dispersion is the dispersed particle size of the color material particles dispersed in a dispersion medium containing at least a solvent, and is measured by a laser light scattering particle size distribution meter. It is what is done. The particle size can be measured with a laser light scattering particle size distribution meter by appropriately diluting the color material dispersion liquid to a concentration that can be measured with a laser light scattering particle size distribution meter (for example, 1000 times). Etc.) and can be measured at 23 ° C. by a dynamic light scattering method using a laser light scattering particle size distribution meter (for example, Nanotrack particle size distribution measuring device UPA-EX150 manufactured by Nikkiso Co., Ltd.). The average dispersed particle size here is a volume average particle size.

  In the color material dispersion of the present invention, the content of the color material is not particularly limited. From the viewpoint of dispersibility and dispersion stability, the content of the color material is preferably 5 to 40% by mass, and more preferably 10 to 20% by mass, based on the total amount of the color material dispersion.

[(B) Dispersant]
In the color material dispersion of the present invention, the color material (A) is used by being dispersed in a solvent with a dispersant (B). (B) The dispersant can be appropriately selected from those conventionally used as dispersants. As specific examples of the dispersant, for example, cationic, anionic, nonionic, amphoteric, silicone, and fluorine surfactants can be used. Among the surfactants, a polymer surfactant (polymer dispersant) is preferable because it can be uniformly and finely dispersed.

  Examples of the polymer dispersant include (co) polymers of unsaturated carboxylic acid esters such as polyacrylic acid esters; (partial) amine salts of (co) polymers of unsaturated carboxylic acid such as polyacrylic acid; (Partial) ammonium salts and (partial) alkylamine salts; (co) polymers of hydroxyl group-containing unsaturated carboxylic acid esters such as hydroxyl group-containing polyacrylates and their modified products; polyurethanes; unsaturated polyamides; polysiloxanes Long chain polyaminoamide phosphates; polyethylenimine derivatives (amides and their bases obtained by reaction of poly (lower alkylene imines) with free carboxyl group-containing polyesters); polyallylamine derivatives (polyallylamine and free carboxyls) Polyester, polyamide or ester-amide co-condensation with groups The reaction product obtained by reacting one or more compound selected from among the three compounds of (polyester amide)), and the like.

As the polymer dispersant, among them, at least the structural unit represented by the following general formula (II) from the viewpoint that the colorant represented by the above general formula (I) can be suitably dispersed and the dispersion stability is good. A polymer in which at least a part of the nitrogen moiety of the structural unit and an acidic organic phosphorus compound form a salt, and one or more urethane bonds (—NH—COO—) in one molecule. It is preferable that it is 1 or more types selected from the group which consists of a urethane type dispersing agent which consists of a compound which has.
Hereinafter, the preferable dispersant will be described in detail.

<Polymer having at least a structural unit represented by the following general formula (II), wherein at least a part of the nitrogen moiety of the structural unit and an acidic organic phosphorus compound form a salt>
In the present invention, as the dispersant (B), at least a structural unit represented by the following general formula (II) is included, and at least a part of the nitrogen moiety of the structural unit and the acidic organic phosphorus compound form a salt. The polymer thus obtained can be suitably used.

(In the general formula (II), R ¹¹ is a hydrogen atom or a methyl group, A is a direct bond or a divalent linking group, Q is a group represented by the following general formula (II-a), or a substituted group. Represents a nitrogen-containing heterocyclic group which may have a group and can form a salt with an acid.)

(In general formula (II-a), R ¹² and R ¹³ each independently represent a hydrogen atom or a hydrocarbon group that may contain a hetero atom, and R ¹² and R ¹³ may be the same or different from each other. May be.)

In general formula (II), A is a direct bond or a divalent linking group. The direct bond means that Q is directly bonded to the carbon atom in the general formula (II) without a linking group.
Examples of the divalent linking group in A include an alkylene group having 1 to 10 carbon atoms, an arylene group, a -CONH- group, a -COO- group, and an ether group having 1 to 10 carbon atoms (-R'-OR “-: R ′ and R” are each independently an alkylene group), combinations thereof, and the like.
Among these, from the viewpoint of dispersibility, A in the general formula (II) is preferably a direct bond, a -CONH- group, or a divalent linking group containing a -COO- group.
For example, when A is a divalent linking group containing a —COO— group and Q is a group represented by the general formula (II-a), the structural unit represented by the general formula (II) is represented by the following formula ( The structure represented by II-2) is mentioned.

(In General Formula (II-2), R ¹¹ is the same as in General Formula (II), R ¹² and R ¹³ are the same as in General Formula (II-a), and R ¹⁴ is the number of carbon atoms. 1 to 8 alkylene groups, — [CH (R ¹⁵ ) —CH (R ¹⁶ ) —O] _x —CH (R ¹⁵ ) —CH (R ¹⁶ ) — or — [(CH ₂ ) _y —O] _z — (CH ₂ ) _y —, R ¹⁵ and R ¹⁶ are each independently a hydrogen atom or a methyl group, x is an integer of 1 to 18, y is an integer of 1 to 5, and z is an integer of 1 to 18. Represents.)

The alkylene group having 1 to 8 carbon atoms in R ¹⁴ may be linear or branched. For example, a methylene group, an ethylene group, a trimethylene group, a propylene group, various butylene groups, various pentylene groups, And various hexylene groups and various octylene groups.
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.
R ¹⁴ is preferably an alkylene group having 1 to 8 carbon atoms from the viewpoint of dispersibility. Among them, R ¹⁴ is more preferably a methylene group, an ethylene group, a propylene group, or a butylene group. An ethylene group is more preferable.

Examples of the hydrocarbon group in the hydrocarbon group which may contain a hetero atom of R ¹² and R ^{13 in} the general formula (II-a) include an alkyl group, an aralkyl group, and an aryl group.
Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, a butyl group, an isopropyl group, a tert-butyl group, a 2-ethylhexyl group, a cyclopentyl group, a cyclohexyl group, and the like. 1-18 are preferable and, among them, a methyl group or an ethyl group is more preferable.
Examples of the aralkyl group include a benzyl group, a phenethyl group, a naphthylmethyl group, and a biphenylmethyl group. 7-20 are preferable and, as for the carbon atom number of an aralkyl group, 7-14 are more preferable.
Examples of the aryl group include a phenyl group, a biphenyl group, a naphthyl group, a tolyl group, and a xylyl group. 6-24 are preferable and, as for the carbon atom number of an aryl group, 6-12 are more preferable. The preferred number of carbon atoms does not include the number of carbon atoms of the substituent.
The hydrocarbon group containing a hetero atom has a structure in which a carbon atom in the hydrocarbon group is replaced with a hetero atom. Examples of the hetero atom that the hydrocarbon group may contain include an oxygen atom, a nitrogen atom, a sulfur atom, and a silicon atom.
Moreover, the hydrogen atom in a hydrocarbon group may be substituted by halogen atoms, such as a C1-C5 alkyl group, a fluorine atom, a chlorine atom, and a bromine atom.

Examples of the nitrogen-containing heterocyclic group capable of forming a salt which may have a substituent in Q include a 5- to 7-membered nitrogen-containing heterocyclic monocycle or a condensed ring thereof. Furthermore, it may have another hetero atom and may have a substituent. Moreover, the nitrogen-containing heterocyclic group may have aromaticity.
Specific examples of the nitrogen-containing heterocyclic compound forming the nitrogen-containing heterocyclic group include pyridine, piperidine, piperazine, morpholine, pyrrolidine, pyrroline, imidazole, pyrazole, triazole, tetrazole, and benzimidazole. Of these, nitrogen-containing heterocyclic compounds containing only nitrogen atoms as heteroatoms such as pyridine, piperidine, piperazine, and imidazole are preferred, and nitrogen-containing heterocyclic groups having aromaticity such as pyridine and imidazole are preferred. More preferred.

  Examples of the substituent that the nitrogen-containing heterocyclic group may have include a linear, branched or cyclic alkyl group having 1 to 12 carbon atoms, an aralkyl group, an aryl group, F, Cl, Br. And the like, and combinations thereof can also be used. Moreover, the substitution position of these substituents and the number of substituents are not particularly limited.

Examples of the structural unit represented by the general formula (II) include dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate, diethylaminoethyl (meth) acrylate, diethylaminopropyl (meth) acrylate, pentamethylpiperidyl (meta ) Nitrogen-containing (meth) acrylates such as acrylates; Nitrogen-containing vinyl monomers such as vinylimidazole and vinylpyridine; and structural units derived from acrylamide monomers such as dimethylaminopropylacrylamide. It is not limited.
The structural unit represented by the general formula (II) may be composed of one type or may include two or more types of structural units.

As a polymer having at least a structural unit represented by the general formula (II) and having a salt formed by at least part of the nitrogen moiety of the structural unit and the acidic organic phosphorus compound, the dispersibility is improved. In view of the above, it is preferable to further include a portion having solvent affinity. As the solvent affinity site, a monomer having an ethylenically unsaturated bond that can be polymerized with a monomer that derives the structural unit represented by the general formula (II) is selected depending on the solvent so as to have solvent affinity. It is preferable to select and use as appropriate. As a standard, it is preferable to introduce a solvent-affinity site so that the solubility of the polymer at 23 ° C. is 50 (g / 100 g solvent) or more with respect to the solvent used in combination.
As the polymer used as a dispersant in the present invention, among others, a block copolymer having a specific structure described later, and two types of graft copolymers having a specific structure described later are used for dispersibility of the coloring material and This is preferable from the viewpoint that the dispersion stability and the heat resistance of the resin composition are improved, and a colored layer having high brightness and high contrast can be formed.
Hereinafter, preferred specific block copolymers and preferred graft copolymers will be described in order.

(Block copolymer)
In the present invention, the block copolymer preferably used as the dispersant (B) includes a block unit having a structural unit represented by the general formula (II) and a structural unit represented by the following general formula (III). And a block copolymer in which at least a part of the nitrogen moiety of the structural unit represented by the general formula (II) and the acidic organic phosphorus compound form a salt.

(In General Formula (III), A ′ is a direct bond or a divalent linking group, R ²⁰ is a hydrogen atom or a methyl group, R ²¹ is a hydrocarbon group, — [CH (R ²² ) —CH (R ²³ ) —O] _x —R ²⁴ or — [(CH ₂ ) _y —O] _z —R ²⁴ , wherein R ²² and R ²³ are each independently a hydrogen atom or a methyl group. R ²⁴ is a hydrogen atom, a hydrocarbon group, a monovalent group represented by —CHO, —CH ₂ CHO, or —CH ₂ COOR ²⁵ , and R ²⁵ is a hydrogen atom or a carbon atom having 1 to 5 carbon atoms. It is an alkyl group.
The hydrocarbon group may have a substituent.
x is an integer of 1 to 18, y is an integer of 1 to 5, and z is an integer of 1 to 18. )

(Block part having a structural unit represented by the general formula (II))
The said block copolymer has a block part which has a structural unit represented by general formula (II). Since the structural unit represented by general formula (II) is as above-mentioned, description here is abbreviate | omitted.
In the block having the structural unit represented by the general formula (II), it is preferable that three or more structural units represented by the general formula (II) are included. Especially, from the point which improves a dispersibility and dispersion stability, it is preferable to contain 3-100 pieces, It is more preferable to contain 3-50 pieces, Furthermore, it is more preferable to contain 3-30 pieces.
The structural unit represented by the general formula (II) only needs to have affinity with the color material, and may be composed of one kind or may contain two or more kinds of structural units.

In the block copolymer having the structural unit represented by the general formula (II), the content ratio of the structural unit represented by the general formula (II) is the same as the block copolymer having the structural unit represented by the general formula (II). When the whole polymer is 100% by mass, it is preferably 5 to 60% by mass, and more preferably 10 to 40% by mass.
In addition, the content rate of the said structural unit is computed from the preparation amount at the time of synthesize | combining the block copolymer which has a structural unit represented by general formula (II).

(Block part having a structural unit represented by the general formula (III))
The block copolymer has a block portion having a structural unit represented by the general formula (III). By having the said block part, solvent affinity is made more favorable and the dispersibility and dispersion stability of a coloring material are improved.

  In the general formula (III), A ′ can be the same as A in the general formula (II). Especially, it is preferable that it is a structure represented by following formula (III-1) from the point of the solubility to an organic solvent.

(In general formula (III-1), R ²⁰ and R ²¹ are the same as in general formula (III).)

In General Formula (III) and General Formula (III-1), R ²¹ represents a hydrocarbon group, — [CH (R ²² ) —CH (R ²³ ) —O] _x —R ^24, or — [(CH ₂ ) It shows the _y -O] _z -R ^24.
The hydrocarbon group for R ²¹ is preferably an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, or an aryl group.
The alkyl group having 1 to 18 carbon atoms may be linear, branched or cyclic, such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, 2 -Ethylhexyl group, 2-ethoxyethyl group, cyclopentyl group, cyclohexyl group, bornyl group, isobornyl group, dicyclopentanyl group, adamantyl group, lower alkyl group-substituted adamantyl group and the like can be mentioned.
The alkenyl group having 2 to 18 carbon atoms may be linear, branched or cyclic. Examples of such an alkenyl group include a vinyl group, an allyl group, and a propenyl group. 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.

Examples of the aryl group include a phenyl group, a biphenyl group, a naphthyl group, a tolyl group, and a xylyl group, and may further have a substituent. 6-24 are preferable and, as for the carbon atom number of an aryl group, 6-12 are more preferable.
Moreover, as an aralkyl group, a benzyl group, a phenethyl group, a naphthylmethyl group, a biphenylmethyl group, etc. are mentioned, Furthermore, you may have a substituent. 7-20 are preferable and, as for the carbon atom number of an aralkyl group, 7-14 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 number of carbon atoms does not include the number of carbon atoms of the substituent.

In R ²¹ , x, y, and z can be the same as those shown for R ¹⁴ .
The hydrocarbon group for R ²⁴ can be the same as that shown for R ²¹ .
R ²⁵ is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and may be linear, branched, or cyclic.
In addition, R ²¹ in the structural units represented by the general formula (III) and the general formula (III-1) may be the same as or different from each other.

As the R ²¹ , it is preferable to use a material having excellent solubility with a solvent described later. Specifically, for example, the solvent is generally used as a solvent for a colored resin composition for a color filter. In the case of using a solvent such as ether alcohol acetate, ether, or ester, a methyl group, ethyl group, isobutyl group, n-butyl group, 2-ethylhexyl group, benzyl group or the like is preferable.

Further, R ²¹ is substituted with a substituent such as an alkoxy group, a hydroxyl group, a carboxyl group, an amino group, an epoxy group, an isocyanate group, or a hydrogen bond-forming group as long as it does not interfere with the dispersion performance of the block copolymer. Alternatively, after the synthesis of the block copolymer, the substituent may be added by reacting with the compound having the substituent.

  The number of structural units constituting the block part having the structural unit represented by the general formula (III) is not particularly limited, but the solvent affinity part and the color material affinity part effectively act to disperse the color material. From the point which improves, it is preferable that it is 10-300 pieces, It is more preferable that it is 10-100 pieces, Furthermore, it is more preferable that it is 10-70 pieces.

In the block copolymer, the content of the structural unit represented by the general formula (III) is preferably 40 to 95% by mass when the entire block copolymer is 100% by mass, and 60 to 90%. More preferably, it is mass%.
In addition, the content rate of the said structural unit is computed from the preparation amount at the time of synthesize | combining the block part which has a structural unit represented by general formula (III).

  The block part having the structural unit represented by the general formula (III) may be selected so as to function as a solvent affinity site, and the structural unit represented by the general formula (III) is composed of one kind. There may be two or more structural units. In the present invention, a structural unit having a nitrogen moiety capable of forming a salt with an acidic organic phosphorus compound described later may be included as a block part, and the structural unit represented by the general formula (III) includes two or more structural units. When included, two or more kinds of structural units may be randomly arranged in the block portion.

  In the block copolymer, the number of units m of the structural unit of the block part having the structural unit represented by the general formula (II), and the structural unit of the block part having the structural unit represented by the general formula (III) The ratio m / n of the number n of units is preferably in the range of 0.01 to 1, and in the range of 0.05 to 0.7, the dispersibility and dispersion stability of the color material. It is more preferable from the point.

  As the binding order of the block copolymer, the block copolymer has a block part having a structural unit represented by the general formula (II) and a block part having a structural unit represented by the general formula (III), and a coloring material. It is not particularly limited as long as it can be stably dispersed, and the block part including the structural unit represented by the general formula (III) is bonded to only one end of the block copolymer. However, it is preferable because it is excellent in interaction with the colorant and can effectively suppress aggregation of the dispersants.

The mass average molecular weight Mw of the block copolymer is not particularly limited, but is preferably 1000 to 20000, and preferably 2000 to 12000 from the viewpoint of improving the dispersibility and dispersion stability of the color material. Is more preferable, and it is more preferable that it is 3000-10000.
In the present invention, the mass 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 standard for calibration curve was Mw377400, 210500, 96000, 50400. , 20650, 10850, 5460, 2930, 1300, 580 (Easy 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.).

(Graft copolymer 1)
In the present invention, as a kind of graft copolymer preferably used as the dispersant, a structural unit represented by the general formula (II) and a structural unit represented by the following general formula (IV) are included. And a graft copolymer in which at least a part of the nitrogen moiety contained in the structural unit represented by the general formula (II) and the acidic organic phosphorus compound form a salt (hereinafter referred to as “graft copolymer 1”) ).

(In general formula (IV), R ²⁶ is a hydrogen atom or a methyl group, L is a direct bond or a divalent linking group, and Polymer is represented by the following general formula (V) or the following general formula (VI). (Represents a polymer chain having at least one structural unit.)

(In the general formula (V) and the general formula ^{(VI), R 27} is a hydrogen atom or a methyl ^{group, R 28} is a hydrocarbon group, a cyano ^{group, - [CH (R 29)} -CH (R 30) -O _{^{] x -R 31, - [(}} CH 2) y -O] z -R 31, - [CO- (CH 2) y -O] z -R 31, -CO-O-R 32 or -O-CO A monovalent group represented by -R ^33. R ²⁹ and R ³⁰ each independently represents a hydrogen atom or a methyl group;
R ³¹ is a hydrogen atom, a hydrocarbon group, a monovalent group represented by —CHO, —CH ₂ CHO or —CH ₂ COOR ³⁴ , and R ³² is a hydrocarbon group, a cyano group, — [CH (R ²⁹ ) —CH (R ³⁰ ) —O] _x —R ³¹ , — [(CH ₂ ) _y —O] _z —R ³¹ , — [CO— (CH ₂ ) _y —O] _z —R ^31. It is a monovalent group. R ³³ represents an alkyl group having 1 to 18 carbon atoms, and R ³⁴ represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
The hydrocarbon group may have a substituent.
m represents an integer of 1 to 5, and n and n ′ represent an integer of 5 to 200. x is an integer of 1 to 18, y is an integer of 1 to 5, and z is an integer of 1 to 18. )

(Structural unit represented by general formula (IV))
The graft copolymer 1 has good solvent affinity by having the structural unit represented by the general formula (IV) including a polymer chain in the side chain.
In the general formula (IV), L is a direct bond or a divalent linking group. The divalent linking group in L is not particularly limited as long as it can link an ethylenically unsaturated double bond and a polymer chain. Examples of the divalent linking group in L include an alkylene group, an alkylene group having a hydroxyl group, an arylene group, a —CONH— group, a —COO— group, a —NHCOO— group, an ether group (—O— group), and a thioether group. (—S— group), and combinations thereof. In the present invention, the direction of bonding of the divalent linking group is arbitrary. That is, when -CONH- is contained in the divalent linking group, -CO may be on the carbon atom side of the main chain and -NH may be on the polymer chain side of the side chain. On the carbon atom side, -CO may be a polymer chain side chain.

The hydrocarbon group in R ²⁸ , R ³¹ , and R ³² can be the same as that shown for R ²¹ . In addition, the alkyl group having 1 to 18 carbon atoms in R ³³ can be the same as that represented by R ²¹ . The alkyl group having 1 to 5 carbon atoms in R ³⁴ may be similar to that shown by the R ^35.
In the above R ²⁸ and R ³² , x, y and z can be the same as those shown for R ¹⁴ .

  The polymer chain contained in the structural unit represented by the general formula (IV) includes methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, and n-butyl (meth) acrylate among the above-described structural units. , Isobutyl (meth) acrylate, tert-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, cyclohexyl (meth) acrylate, benzyl (meth) acrylate, phenyl (meth) acrylate, Those having a structural unit derived from styrene, α-methylstyrene, vinylcyclohexane and the like are preferable. However, it is not limited to these.

  In general formula (VI), m is an integer of 1-5, Preferably it is an integer of 2-5, More preferably, it is an integer of 4 or 5. The number of units n and n ′ of the polymer chain constituent units may be an integer of 5 to 200, and is not particularly limited, but is preferably in the range of 5 to 100.

  The mass average molecular weight Mw of the polymer chain in Polymer is preferably in the range of 500 to 20000, and more preferably in the range of 1000 to 10,000. By being the said range, while being able to hold | maintain sufficient steric repulsion effect as a dispersing agent, the increase in the time required for dispersion | distribution of the color material by a steric effect can also be suppressed.

Further, as a guide, the polymer chain in Polymer preferably has a solubility at 23 ° C. of 50 (g / 100 g solvent) or more with respect to the solvent used in combination.
The solubility of the polymer chain can be based on the fact that the raw material into which the polymer chain is introduced when preparing the graft copolymer 1 has the above-mentioned solubility. For example, when a polymerizable oligomer containing a polymer chain and a group having an ethylenically unsaturated double bond at its end is used to introduce the polymer chain into the graft copolymer 1, the polymerizable oligomer has the above solubility. It only has to. In addition, after a copolymer is formed with a monomer containing a group having an ethylenically unsaturated double bond, a polymer chain containing a reactive group capable of reacting with a reactive group contained in the copolymer is used. In the case of introducing a polymer chain, the polymer chain containing the reactive group may have the above-described solubility.

  The polymer chain may be a homopolymer or a copolymer. Moreover, the polymer chain contained in the structural unit represented by the general formula (IV) may be used alone or in combination of two or more in the graft copolymer 1.

In the graft copolymer 1, the structural unit containing a nitrogen moiety represented by the general formula (II) is preferably contained in a proportion of 3 to 80% by mass, more preferably 5 to 50% by mass. 10 to 40% by mass is more preferable. If the content of the structural unit containing a nitrogen moiety in the graft copolymer 1 is within the above range, the ratio of the salt-forming moiety in the graft copolymer 1 is appropriate, and the solubility of the polymerizable oligomer in the solvent is high. Since the decrease can be suppressed, the adsorptivity with respect to the coloring material is improved, and excellent dispersibility and dispersion stability are obtained.
In addition, the content rate of the said structural unit is computed from the preparation amount at the time of synthesize | combining the graft copolymer 1 which has a structural unit represented by general formula (II).

  Further, the mass average molecular weight Mw of the graft copolymer 1 is preferably in the range of 1000 to 100,000, more preferably in the range of 3000 to 30000, and in the range of 5000 to 20000. Further preferred. By being in the above range, the color material can be uniformly dispersed.

  The graft copolymer used for the graft copolymer 1 before forming a salt having the structural unit represented by the general formula (II) and the structural unit represented by the following general formula (IV) Although it does not specifically limit as a manufacturing method, For example, the nitrogen-containing monomer represented by the following general formula (II '), and at least 1 structural unit represented by the said general formula (V) or the said general formula (VI) are included. Examples thereof include a method in which a polymer chain having a seed and a macromonomer composed of a group having an ethylenically unsaturated double bond at its terminal are contained as a copolymerization component and copolymerized. Further, other monomers can be used as necessary, and a known polymerization means can be used as the polymerization means.

(In general formula (II ′), R ¹¹ , A and Q are the same as in general formula (II).)

Further, after the addition of the nitrogen-containing monomer represented by the general formula (II ′) and another monomer containing a group having an ethylenically unsaturated double bond to form a copolymer, the copolymer The polymer chain may be introduced using a polymer chain containing a reactive group capable of reacting with the reactive group contained therein. Specifically, for example, after synthesizing a copolymer having a substituent such as an alkoxy group, a hydroxyl group, a carboxyl group, an amino group, an epoxy group, an isocyanate group, or a hydrogen bond-forming group, a functional group that reacts with the substituent is added. The polymer chain may be introduced by reacting with the polymer chain contained therein.
For example, a polymer chain having a glycidyl group at the terminal is reacted with a copolymer having a carboxyl group at the side chain, or a polymer chain having a hydroxy group at the terminal is reacted with a copolymer having an isocyanate group at the side chain. Alternatively, polymer chains can be introduced.
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.

(Graft copolymer 2)
Further, another graft copolymer preferably used as the dispersant (B) is represented by the following general formula (IV ′) having a polymer chain containing a structural unit represented by the general formula (II) in the side chain. In the general formula (II) contained in the polymer chain of the structural unit represented by the general formula (IV ′), the structural unit represented by the general formula (IV) Examples thereof include a graft copolymer (hereinafter referred to as “graft copolymer 2”) in which at least a part of the nitrogen moiety of the structural unit represented and a salt of an acidic organic phosphorus compound form a salt.

(In the general formula (IV ′), R ^{26 ′} is a hydrogen atom or a methyl group, L ′ is a direct bond or a divalent linking group, and Polymer ′ is a structural unit represented by the general formula (II). Represents a polymer chain having at least one kind.)

In the general formula (IV ′), L ′ is the same as L in the general formula (IV).
In the general formula (IV ′), the polymer chain having the structural unit represented by the general formula (II) in Polymer ′ is represented by the general formula (II) as long as the effects of the present invention are not impaired. A structural unit other than the structural unit represented, for example, a structural unit represented by the general formula (V) may be included.
The proportion of the structural unit represented by the general formula (II) in the polymer chain in the general formula (IV ′) is preferably 20% by mass or more, and more preferably 50% by mass or more.

  The mass average molecular weight Mw of the polymer chain of the structural unit represented by the general formula (IV ′) is preferably in the range of 500 to 10,000, and more preferably in the range of 1000 to 5000. By being in the above range, the color material can be adsorbed appropriately, and stable dispersibility can be achieved without impairing the affinity for the solvent.

Moreover, the structural unit represented by the general formula (IV ′) and the structural unit represented by the general formula (IV) included in the graft copolymer 2 may each be included alone. It may be good, and 2 or more types may be mixed and contained.
The graft copolymer 2 is not limited to the structural unit represented by the general formula (IV ′) and the structural unit represented by the general formula (IV), as long as the effects of the present invention are not impaired. A structural unit may be included. Other structural units include, for example, an ethylenically unsaturated bond that can be polymerized with the structural unit represented by the general formula (IV ′) and the macromonomer that derives the structural unit represented by the general formula (IV). The structural unit derived from the monomer which has is mentioned. By containing other structural units, the progress of the polymerization reaction may be promoted during the synthesis of the graft copolymer 2 in some cases. On the other hand, since the dispersibility of a good color material may be hindered by including other structural units, it is appropriately adjusted according to the color material to be combined and the application.

  In the graft copolymer 2, the structural unit represented by the general formula (IV ′) is preferably contained in a proportion of 3 to 80% by mass, more preferably 5 to 50% by mass, More preferred is 40% by mass. Moreover, it is preferable that the structural unit represented by the said general formula (IV) is contained in the ratio of 20-97 mass%, 50-95 mass% is more preferable, 60-90 mass% is further more preferable. Moreover, even if it is a case where another structural unit is contained, it is preferable that it is contained in the ratio of 30 mass% or less, 20 mass% or less is more preferable, and 10 mass% or less is further more preferable. If the content of each structural unit in the graft copolymer 2 is within the above range, the ratio of salt forming sites by the structural unit represented by the general formula (IV ′) in the graft copolymer 2 is Since it becomes appropriate and the solubility with the solvent by the structural unit represented by the general formula (IV) does not become excessively high, the adsorptivity to the color material is improved, and the dispersibility and stability of the color material are obtained. It is done.

Moreover, it is preferable that the mass mean molecular weight Mw of the said graft copolymer 2 exists in the range of 1000-100000, It is more preferable in the range of 3000-50000, It is in the range of 5000-30000. Further preferred. By being in the above range, the color material can be uniformly dispersed.
The graft copolymer 2 can be prepared with reference to Japanese Patent Application Laid-Open No. 2011-75661, but is not limited to this method, and is produced in the same manner as the method described in the graft copolymer 1 described above. It is possible.

(Acid organophosphorus compound)
In the preferred dispersant of the present invention, at least a part of the nitrogen moiety of the structural unit represented by the general formula (II) and an acidic organic phosphorus compound form a salt (hereinafter referred to as phosphate modification). There is a polymer).
In the present invention, an acidic organophosphorus compound is used to form a salt at the nitrogen moiety of the structural unit represented by the general formula (II). Adsorption improves the dispersibility and dispersion stability of the color material. Further, the surface of the color material is coated with phosphate by localizing a salt forming site containing the acidic organic phosphorus compound as a dispersant on the particle surface of the color material represented by the general formula (I). Therefore, attack (hydrogen abstraction) of the coloring material to the dye skeleton by active oxygen is suppressed, and the heat resistance and light resistance of the coloring material including the dye skeleton represented by the general formula (I) are improved. For this reason, when a phosphate-modified polymer is used as a dispersant, the colorant represented by the general formula (I) having a high transmittance used in the present invention is discolored when heated at a high temperature in a well dispersed state. Therefore, even if it goes through the high temperature heating process in a color filter manufacturing process, a colored layer with higher brightness can be formed.

  As the acidic organic phosphorus compound, an organic phosphoric acid compound represented by the following general formula (VII) is particularly preferable.

(In Formula (VII), R ^a and R ^{a ′} are each independently a hydrogen atom, a hydroxyl group, a hydrocarbon group, — [CH (R ^c ) —CH (R ^d ) —O] _s —R ^e , — [ (CH ₂ ) _t —O] _u —R ^e or a monovalent group represented by —O—R ^b , where R ^b is a hydrocarbon group, — [CH (R ^c ) —CH (R ^d ) _{^{-O] s -R e, - [}} (CH 2) t -O] u -R e, -C (R f) (R g) -C (R h) (R i) -OH, or, -CH It is a monovalent group represented by _2- C (R ^j ) (R ^k ) —CH ₂ —OH.
R ^c and R ^d are each independently a hydrogen atom or a methyl group. R ^e is a hydrogen atom, a hydrocarbon group, —CHO, —CH ₂ CHO, —CO—CH═CH ₂ , —CO—C (CH ₃ ) ═CH ₂ or monovalent represented by —CH ₂ COOR ^{e ′.} R ^{e ′} is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms. R ^f , R ^g , R ^h , R ⁱ , R ^j and R ^k are each independently a hydrogen atom, a hydrocarbon group, or a group in which a hydrocarbon group is bonded to at least one of an ether bond and an ester bond. R ^f and R ^h may be bonded to each other to form a ring structure. When the above cyclic structure is formed, it may have a substituent R ¹ , and R ¹ is a hydrogen atom, a hydrocarbon group, or a group in which a hydrocarbon group is bonded by at least one of an ether bond and an ester bond. It is.
The hydrocarbon group may have a substituent.
s is an integer of 1 to 18, t is an integer of 1 to 5, and u is an integer of 1 to 18. )

Examples of the hydrocarbon group in R ^a , R ^{a ′} , R ^b , R ^e , R ^f , R ^g , R ^h , R ⁱ , R ^j, and R ^k include, for example, an alkyl group having 1 to 18 carbon atoms, carbon Examples thereof include an alkenyl group having 2 to 18 atoms, an aralkyl group, and an aryl group. The alkyl group having 1 to 18 carbon atoms, the alkenyl group having 2 to 18 carbon atoms, the aralkyl group, and the aryl group can be the same as R ²¹ in the general formula (III).
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.
In addition, examples of the substituent of the aromatic ring such as the aryl group and the aralkyl group include straight chain and branched alkyl groups having 1 to 4 carbon atoms, alkenyl groups, nitro groups, and halogen atoms. it can.
In R ^a , R ^{a ′} and R ^b , s is an integer of 1 to 18, t is an integer of 1 to 5, and u is an integer of 1 to 18. s is preferably an integer of 1 to 4, more preferably an integer of 1 to 2, and t is preferably an integer of 1 to 4, more preferably 2 or 3. u is preferably an integer of 1 to 4, more preferably an integer of 1 to 2.

In R ^f , R ^g , R ^h , R ⁱ , R ^j and R ^k , a group in which a hydrocarbon group is bonded by at least one of an ether bond and an ester bond is -R'-O-R ", -R '-(C = O) -O-R "or -R'-O- (C = O) -R"(R' and R "are hydrocarbon groups or ether groups and esters of hydrocarbon groups. A group represented by at least one bond). One group may have two or more ether bonds and ester bonds. Examples of the monovalent hydrocarbon group include an alkyl group, an alkenyl group, an aralkyl group, and an aryl group. Examples of the divalent hydrocarbon group include an alkylene group, an alkenylene group, an arylene group, and combinations thereof. The group of is mentioned.

In the general formula (VII), R ^f and R ^h are bonded to each other to form a ring structure, specifically, having a structure represented by the following general formula (VII-1). is there.

(In General Formula (VII-1), R ^a , R ^g , and R ⁱ are the same as those in General Formula (VII) above. R ^m is a group in which R ^f and R ^h are bonded. And may further have a substituent R ¹ ).

When R ^f and R ^h are bonded to form a ring structure, the number of carbon atoms forming the ring structure is preferably 5 to 8, more preferably 6, that is, a 6-membered ring. .
The hydrocarbon group in the substituent R ¹ or a group in which the hydrocarbon group is bonded by at least one of an ether bond and an ester bond is the same as that in R ^f , R ^g , R ^h , R ⁱ , R ^j and R ^k . Can be similar.

—C (R ^f ) (R ^g ) —C (R ^h ) (R ⁱ ) —OH or —CH ₂ —C (R ^j ) (R ^k ) —CH ₂ —OH is, for example, phosphoric acid, respectively. It can be obtained by reacting a monofunctional epoxy compound or a monofunctional oxetane compound with the acidic group (OH) of the group.

As the acidic organic phosphorus compound, in particular, in the organic phosphoric acid compound represented by the general formula (VII), R ^a is a hydrocarbon group, — [CH (R ^c ) —CH (R ^d ) —O] _s. —R ^e or a monovalent group represented by — [(CH ₂ ) _t —O] _u —R ^e , and R ^{a ′} is ^a monovalent group represented by a hydroxyl group or —O—R ^b . It is preferable from the viewpoint that the dispersibility and dispersion stability of the color material and the heat resistance of the color material can be improved, a colored layer with high brightness and high contrast can be formed, and the alkali resistance of the coating film is increased. . In such a case, since R ^a has a structure in which a carbon atom is directly bonded to phosphorus, heat resistance and hydrolysis resistance are improved, while R ^{a ′} is represented by a hydroxyl group or —O—R ^b. Since it has a monovalent group, it is estimated that the affinity with the colorant is improved.

Further, among the acidic organic phosphorus compounds, among them, the organic phosphonic acid monoester compound improves the dispersibility and dispersion stability of the color material and the heat resistance of the color material, and has a high brightness and high contrast colored layer. It is preferable from the point that the alkali resistance of the coating film becomes high. In the case of organic phosphonic acid monoester compounds, thickening hardly occurs even when the number of salt forming sites in the polymer is increased, and the amount of salt forming sites is easily increased, so that the heat resistance of the coloring material is also improved. Easy to improve.
In the present invention, the organic phosphonic acid monoester compound has a structure of the following general formula (VII-2) in which one of the two acidic groups of the organic phosphonic acid is esterified.

(In General Formula (VII-2), R ^b is the same as that in General Formula (VII). R ⁿ is a hydrocarbon group, — [CH (R ^c ) —CH (R ^d ) —O. ] _s -R ^e, _{or, - [(CH 2) t} -O] a monovalent group represented by u -R ^e, the hydrocarbon group may .R ^c may have a substituent , R ^d , R ^e , s, t, and u are the same as those in the general formula (VII).)

Among them, R ^b is represented by —C (R ^f ) (R ^g ) —C (R ^h ) (R ⁱ ) —OH, or —CH ₂ —C (R ^j ) (R ^k ) —CH ₂ —OH. It is more preferable from the viewpoint of good alkali resistance, colorant dispersibility and dispersion stability.
A hydrocarbon group in R ^{n, a} monovalent group represented by — [CH (R ^c ) —CH (R ^d ) —O] _s —R ^e , or — [(CH ₂ ) _t —O] _u —R ^e May be the same as R ^a in the general formula (VII).

  In the dispersant, the content of the acidic organophosphorus compound is not particularly limited as long as good dispersion stability is exhibited, but the nitrogen moiety of the structural unit represented by the general formula (II) Is about 0.05 to 4.0 molar equivalents, preferably 0.1 to 1.5 molar equivalents, more preferably 0.3 to 1.0 molar equivalents, This is preferable from the viewpoint of improving dispersion stability and improving heat resistance.

  In order to prepare a polymer in which at least part of the nitrogen moiety of the structural unit of the polymer having the structural unit represented by the general formula (II) and the acidic organic phosphorus compound form a salt, the above general A dispersant can be produced by adding the acidic organic phosphorus compound in a solvent for dissolving or dispersing the polymer having the structural unit represented by the formula (II) and stirring (heating if necessary). .

<Urethane-based dispersant>
The urethane-based dispersant suitably used as the dispersant is a dispersant composed of a compound having one or more urethane bonds (—NH—COO—) in one molecule.
By using a urethane-based dispersant, good dispersion can be achieved with a small amount. By making the amount of the dispersant small, it is possible to relatively increase the amount of the curing component and the like, and as a result, it is possible to form a colored layer having excellent heat resistance.

  As the urethane dispersant in the present invention, among others, (1) polyisocyanates having two or more isocyanate groups in one molecule, (2) polyesters having a hydroxyl group at one end or both ends, and one end or It is preferably a reaction product with one or more selected from poly (meth) acrylates having hydroxyl groups at both ends, and (1) polyisocyanates having two or more isocyanate groups in one molecule; (2) at least one selected from polyesters having a hydroxyl group at one or both ends, and poly (meth) acrylates having a hydroxyl group at one or both ends, and (3) active hydrogen in the same molecule And a reaction product of a compound having a basic group or an acidic group.

(1) Polyisocyanates having two or more isocyanate groups in one molecule The polyisocyanates preferably have one or more isocyanate compounds selected from diisocyanates and triisocyanates, and the diisocyanates and triisocyanates. It may be a polymer having a main chain skeleton obtained by polymerizing at least one kind.

  Examples of the main chain structure in which at least one of diisocyanates and triisocyanates is polymerized include a molecular structure in which isocyanate groups are bonded to each other between the above polyisocyanates. Further, the chain structure of the main chain skeleton may contain a ring structure such as an aromatic ring or a heterocyclic ring which may have a substituent.

The diisocyanates used in the urethane-based dispersant may be aliphatic diisocyanates such as hexamethylene diisocyanate and isophorone diisocyanate, but aromatic diisocyanates are preferable from the viewpoint of heat resistance. For example, benzene-1,3-diisocyanate Benzene diisocyanates such as benzene-1,4-diisocyanate; toluene diisocyanates such as toluene-2,4-diisocyanate, toluene-2,5-diisocyanate, toluene-2,6-diisocyanate, toluene-3,5-diisocyanate 1,2-xylene-3,5-diisocyanate, 1,2-xylene-3,6-diisocyanate, 1,2-xylene-4,6-diisocyanate, 1,3-xylene-2,4-diisocyanate 1,3-xylene-2,5-diisocyanate, 1,3-xylene-2,6-diisocyanate, 1,3-xylene-4,6-diisocyanate, 1,4-xylene-2,5-diisocyanate, 1, And aromatic diisocyanates such as xylene diisocyanates such as 4-xylene-2,6-diisocyanate.
Examples of the triisocyanates include benzene triisocyanates such as benzene-1,2,4-triisocyanate, benzene-1,2,5-triisocyanate, and benzene-1,3,5-triisocyanate; -2,3,5-triisocyanate, toluene-2,3,6-triisocyanate, toluene-2,4,5-triisocyanate, toluene-2,4,6-triisocyanate, toluene-3,4,6 -Toluene isocyanates such as triisocyanate, toluene-3,5,6-triisocyanate, 1,2-xylene-3,4,6-triisocyanate, 1,2-xylene-3,5,6-triisocyanate 1,3-xylene-2,4,5-triisocyanate, 1,3-xylene-2,4,6 Xylene such as triisocyanate, 1,3-xylene-3,4,5-triisocyanate, 1,4-xylene-2,3,5-triisocyanate, 1,4-xylene-2,3,6-triisocyanate Aromatic triisocyanates such as triisocyanates can be mentioned. Of these, toluene diisocyanates are preferred from the viewpoint of high heat resistance. These diisocyanates and triisocyanates can be used alone or in admixture of two or more. Among these, it is preferable from the viewpoint of high heat resistance that the toluene diisocyanate has a main chain structure polymerized alone.

(2) Polyesters having a hydroxyl group at one or both ends, and poly (meth) acrylates having a hydroxyl group at one or both ends As polyesters having a hydroxyl group at one or both ends, dispersible from the ^{point, - (O-R j CO} ) n- (R j represents an alkylene group having a carbon number of 1 to 20, n is an integer of 2 or more) is preferably a compound containing a polyester chain represented by. Specific examples of the polyester chain include polylactones such as polycaprolactone, polyvalerolactone and polypropiolactone, and polycondensation polyesters such as polyethylene terephthalate and polybutylene terephthalate. Among these, from the viewpoint of heat resistance, it is preferable to contain polylactones, especially polycaprolactone.

  Specific examples of poly (meth) acrylates having a hydroxyl group at one or both ends include polymethyl (meth) acrylate, polyethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) ) Acrylate copolymer, ethyl (meth) acrylate-butyl (meth) acrylate copolymer, and the like.

(3) Compound having active hydrogen and basic group or acidic group in the same molecule In a compound having active hydrogen and basic group or acidic group in the same molecule, active hydrogen means oxygen atom, nitrogen A hydrogen atom directly bonded to an atom or a sulfur atom, specifically, a hydrogen atom in a functional group such as a hydroxyl group, an amino group, a thiol group, etc., among which a hydrogen atom of a hydroxyl group or an amino group A hydrogen atom of a hydroxyl group or a primary amino group is preferable.

Specific examples of the basic group include tertiary amino groups such as dimethylamino group and diethylamino group, and nitrogen-containing heterocyclic groups such as imidazole and pyridine.
Specific examples of the acidic group include a carboxy group, a sulfo group, a phosphoric acid group, and a phosphonic acid group.

Specific examples of the compound having an active hydrogen and a basic group in the same molecule include, for example, dimethylaminoethanol, diethylaminoethanol, N, N-dimethyl-1,3-propanediamine, N, N-diethyl-1, 3-propanediamine, N, N-dimethyl-1,4-butanediamine, N, N-diethyl-1,4-butanediamine, 1- (2-aminoethyl) -piperazine, 2- (1-pyrrolidyl)- Ethylamine, 4-amino-2-methoxy-pyrimidine, 1- (2-hydroxyethyl) -piperazine, 4- (2-hydroxyethyl) -morpholine, 2-mercaptopyrimidine, 2-mercaptobenzimidazole, 1- (3- Aminopropyl) imidazole, histidine, 2-aminoimidazole, 1- (2-aminoethyl) imidazole And the like.
Specific examples of the compound having an active hydrogen and an acidic group in the same molecule include, for example, mercaptoacetic acid, mercaptopropionic acid, mercaptosuccinic acid, mercaptobenzoic acid, ricinoleic acid, 12-hydroxystearic acid, hydroxyacetic acid, hydroxysuccinic acid. Acid, hydroxybutanoic acid, aminobutanoic acid, 4-aminophenylacetic acid, 4-aminobenzoic acid, 4-hydroxybenzoic acid, aminoacetic acid, hydroxyethanesulfonic acid, hydroxypropanesulfonic acid, mercaptoethanesulfonic acid, aminomethanesulfonic acid, 3-aminopropanesulfonic acid, 4-aminobenzenesulfonic acid, 4-hydroxybenzenesulfonic acid, sulfanilic acid, N- (2-hydroxyethyl) ethylenediaminetriacetic acid, N- (2-hydroxyethyl) iminodiacetic acid, 4- A Roh phenylphosphonic acid, and 4-hydroxyphenyl phosphonic acid and 3-amino-1-phosphonic acid.

  The amine value is preferably 5 to 180 mgKOH / g, more preferably 10 to 160 mgKOH / g, from the viewpoint of dispersibility.

Furthermore, it is preferable that a urethane type dispersing agent does not contain the polyether chain | strand which is easy to cut | disconnect by heating from a heat resistant point. Here, the polyether chain refers to a structure represented by — (O—R ⁱ ) n— (R ⁱ is an alkylene group having 1 to 10 carbon atoms, and n is an integer of 2 or more). _{Specifically, - (O-CH 2 CH} 2) n -, - (O-CH 2 CH 2 CH 2) n -, - (O-CH 2 CH 2 CH 2 CH 2) n -, - (O _{-CH 2 CH 2 CH 2 CH 2} CH 2) n -, - (O-CH 2 CH 2 CH 2 CH 2 CH 2 CH 2) n- can be mentioned.

  Furthermore, the molecular weight of the urethane-based dispersant is preferably in the range of 500 to 30,000 in terms of polystyrene-equivalent weight average molecular weight from the viewpoints of heat resistance, electrical reliability, and dispersibility.

  Further, as commercially available dispersants, Disperbyk-161, 162, 163, 164, 167, 168, 170, 171, 174, 182, 183, 184, 185, BYK-9077 (above, manufactured by Big Chemie Japan Co., Ltd.) ), Azisper PB711 (manufactured by Ajinomoto Co., Inc.), EFKA-46, 47, 48 (manufactured by EFKA CHEMICALS) and the like. Among these, Disperbyk-161, 162, 166, 170, and 174 are preferable from the viewpoint of heat resistance, electrical reliability, and dispersibility.

These (B) dispersants may be used alone or in combination of two or more.
In the colorant dispersion of the present invention, the content of the (B) dispersant is usually 1 to 40% by weight, more preferably 1 to 20% by weight, based on the total amount of the dispersion. And from the viewpoint of dispersion stability.

[(C) Solvent]
In the present invention, the solvent (C) does not react with each component in the colorant dispersion or the colored resin composition described later, and is appropriately selected from solvents that can dissolve or disperse them. it can. Specifically, organic solvents such as alcohols, ether alcohols, esters, ketones, ether alcohol acetates, ethers, aprotic amides, lactones, unsaturated hydrocarbons, saturated hydrocarbons are used. Among them, it is preferable to use an ester solvent from the viewpoint of solubility during dispersion and coating suitability.

Preferred ester solvents include, for example, methyl methoxypropionate, ethyl ethoxypropionate, methoxyethyl acetate, propylene glycol monomethyl ether acetate, 3-methoxy-3-methyl-1-butyl acetate, 3-methoxybutyl acetate, methoxybutyl Acetate, ethoxyethyl acetate, ethyl cellosolve acetate, dipropylene glycol methyl ether acetate, propylene glycol diacetate, 1,3-butylene glycol diacetate, cyclohexanol acetate, 1,6-hexanediol diacetate, diethylene glycol monoethyl ether acetate, Examples include diethylene glycol monobutyl ether acetate.
Among them, it is preferable to use propylene glycol monomethyl ether acetate (PGMEA) from the viewpoint of low risk to the human body and low volatility near room temperature but good heat drying properties. In this case, there is a merit that a special cleaning step is not required even when switching to a colored resin composition using conventional PGMEA.
These solvents may be used alone or in combination of two or more.

  The color material dispersion of the present invention is prepared by using the (C) solvent in a proportion of usually 50 to 95% by mass, preferably 60 to 85% by mass, based on the total amount of the color material dispersion. When there is too little solvent, a viscosity will rise and a dispersibility will fall easily. Moreover, when there are too many solvents, a coloring material density | concentration will fall and it may be difficult to achieve the target chromaticity coordinate after preparing the colored resin composition for color filters.

(Other ingredients)
As long as the effect of this invention is not impaired, you may mix | blend a dispersion auxiliary resin and another component with the coloring material dispersion liquid of this invention as needed.
Examples of the dispersion auxiliary resin include alkali-soluble resins exemplified by a colored resin composition for a color filter described later. The steric hindrance of the alkali-soluble resin makes it difficult for the colorant particles to come into contact with each other, and may have the effect of stabilizing the dispersion or reducing the dispersant due to the dispersion stabilizing effect.
Other components include, for example, surfactants for improving wettability, silane coupling agents for improving adhesion, antifoaming agents, repellency inhibitors, antioxidants, anti-aggregation agents, and UV absorbers. Etc.

  The color material dispersion of the present invention is used as a preliminary preparation for preparing a colored resin composition for a color filter described later. That is, the color material dispersion is preliminarily prepared in the pre-stage of preparing a colored resin composition described later, (color material component mass in the composition) / (solid content mass other than the color material component in the composition) ) Colorant dispersion with a high ratio. Specifically, the ratio of (mass of color material component in composition) / (mass of solid content other than color material component in composition) is usually 1.0 or more. By mixing the colorant dispersion and at least the binder component, a colored resin composition having excellent dispersibility can be prepared.

<Method for producing colorant dispersion>
In the present invention, a method for producing a color material dispersion includes (A) a color material, (B) a dispersant, (C) a solvent, and various additive components used as desired, and the color material is a dispersant. As long as it is a method that can be uniformly dispersed in a solvent, it can be prepared by mixing using a known mixing means.
Specific examples of the method for producing the colorant dispersion include, for example, (B) a dispersant mixed with (C) a solvent and stirred to prepare a dispersant solution, and then the (A) colorant is added to the dispersant solution. If necessary, other components are mixed and dispersed using a known stirrer or disperser to prepare a dispersion.

  Examples of the dispersing machine for performing the dispersion treatment include roll mills such as two rolls and three rolls, ball mills such as a ball mill and a vibrating ball mill, bead mills such as a paint conditioner, a continuous 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 2.00 mm, and more preferably 0.10 to 1.0 mm.

  Specifically, preliminary dispersion is performed with 2 mm zirconia beads having a relatively large bead diameter, and main dispersion is further performed with 0.1 mm zirconia beads having a relatively small bead diameter. Moreover, it is preferable to filter with a membrane filter of 0.5 to 0.1 μm after dispersion.

2. Colored resin composition for color filter The colored resin composition for a color filter according to the present invention contains (A) a color material, (B) a dispersant, (C) a solvent, and (D) a binder component. The (A) color material contains a color material composed of a double salt represented by the following general formula (I).

(The symbols in general formula (I) are as described above.)

  The colored resin composition for a color filter of the present invention uses the color material composed of a double salt represented by the general formula (I) as the color material (A), while adjusting to a desired color tone, A colored layer having excellent heat resistance and high brightness can be formed.

The colored resin composition for a color filter of the present invention contains (A) a color material, (B) a dispersant, (C) a solvent, and (D) a binder component. As long as it is not impaired, it may contain another component as needed.
Hereinafter, the colored resin composition for a color filter according to the present invention will be described, but (A) the color material, (B) the dispersant, and (C) the solvent may be the same as described above. Since it can do, description here is abbreviate | omitted.

<(D) Binder component>
The colored resin composition for a color filter of the present invention contains a binder component in order to impart film formability and adhesion to the surface to be coated. In order to impart sufficient hardness to the coating film, it is preferable to contain a curable binder component. It does not specifically limit as a curable binder component, The curable binder component used in forming the coloring layer of a conventionally well-known color filter can be used suitably.
Examples of the curable binder component include a photocurable binder component containing a photocurable resin that can be polymerized and cured by visible light, ultraviolet light, electron beam, and the like, and a thermosetting resin that can be polymerized and cured by heating. What contains the thermosetting binder component to contain can be used.

When the colored resin composition for a color filter according to the present invention can be selectively deposited in a pattern on a substrate to form a colored layer, for example, when used in an inkjet method, the developability of the curable binder component Is not necessary. In this case, a well-known thermosetting binder component, a photosensitive binder component, etc. which are used when forming a color filter colored layer by an inkjet system etc. can be used suitably.
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. Examples of the thermosetting functional group include an epoxy group, an oxetanyl group, an isocyanate group, and an ethylenically unsaturated bond. An epoxy group is preferably used as the thermosetting functional group. Specific examples of the thermosetting binder component include those described in International Publication No. 2012/144521 pamphlet.

On the other hand, when using a photolithography process when forming a colored layer, the photosensitive binder component which has alkali developability is used suitably.
Hereinafter, although the photosensitive binder component is demonstrated, a curable binder component is not limited to these. In addition to the photosensitive binder component described below, a thermosetting binder component that can be polymerized and cured by heating such as an epoxy resin may be further used.

  Examples of the photosensitive binder component include a positive photosensitive binder component and a negative photosensitive binder component. Examples of the positive photosensitive binder component include a system containing an alkali-soluble resin and an o-quinonediazide group-containing compound as a photosensitizing component.

On the other hand, as the negative photosensitive binder component, a system containing at least an alkali-soluble resin, a polyfunctional monomer, and a photoinitiator is preferably used.
In the colored resin composition for a color filter according to the present invention, a negative photosensitive binder component is preferable because a pattern can be easily formed by an existing process by a photolithography method.
Hereinafter, the alkali-soluble resin, the polyfunctional monomer, and the photoinitiator constituting the negative photosensitive binder component will be specifically described.

(Alkali-soluble resin)
The alkali-soluble resin in the present invention has a carboxyl group, acts as a binder resin, and is suitably selected and used as long as it is soluble in a developer used for pattern formation, particularly preferably an alkali developer. be able to.
A preferable alkali-soluble resin in the present invention is a resin having a carboxyl group, and specific examples thereof include an acrylic copolymer having a carboxyl group and an epoxy (meth) acrylate resin having a carboxyl group. Among these, particularly preferred are those having a carboxyl group in the side chain and further having a photopolymerizable functional group such as an ethylenically unsaturated group in the side chain. This is because the film strength of the cured film formed by containing the photopolymerizable functional group is improved. These acrylic copolymers and epoxy acrylate resins may be used as a mixture of two or more.

The acrylic copolymer having a carboxyl group is obtained by copolymerizing a carboxyl group-containing ethylenically unsaturated monomer and an ethylenically unsaturated monomer.
The acrylic copolymer having a carboxyl group may further contain a structural unit having an aromatic carbocyclic ring. The aromatic carbocycle functions as a component that imparts coating properties to the colored resin composition for color filters.
The acrylic copolymer having a carboxyl group may further contain a structural unit having an ester group. The structural unit having an ester group not only functions as a component that suppresses alkali solubility of the colored resin composition for a color filter, but also functions as a component that improves the solubility in a solvent and further the solvent resolubility.

Specific examples of the acrylic copolymer having a carboxyl group include those described in International Publication No. 2012/144521 pamphlet. Specifically, for example, methyl (meth) acrylate, ethyl ( Examples thereof include a copolymer composed of a monomer having no carboxyl group, such as (meth) acrylate, and one or more selected from (meth) acrylic acid and anhydrides thereof. In addition, for example, a polymer having an ethylenically unsaturated bond introduced by adding an ethylenically unsaturated compound having a reactive functional group such as a glycidyl group or a hydroxyl group to the above copolymer can be exemplified, but the present invention is not limited thereto. Is not to be done.
Among these, a polymer having an ethylenically unsaturated bond introduced, for example, by adding an ethylenically unsaturated compound having a glycidyl group or a hydroxyl group to the copolymer is polymerized with a polyfunctional monomer described later at the time of exposure. This is particularly suitable in that the colored layer becomes more stable.

  The copolymerization ratio of the carboxyl group-containing ethylenically unsaturated monomer in the carboxyl group-containing copolymer is usually 5 to 50% by mass, preferably 10 to 40% by mass. In this case, when the copolymerization ratio of the carboxyl group-containing ethylenically unsaturated monomer is less than 5% by mass, the solubility of the resulting coating film in an alkaline developer is lowered, and pattern formation becomes difficult. On the other hand, when the copolymerization ratio exceeds 50% by mass, there is a tendency that the formed pattern is easily detached from the substrate or the pattern surface is roughened during development with an alkali developer.

  The preferred molecular weight of the carboxyl group-containing copolymer is preferably in the range of 1,000 to 500,000, more preferably 3,000 to 200,000. If it is less than 1,000, the binder function after curing is remarkably lowered, and if it exceeds 500,000, pattern formation may be difficult during development with an alkaline developer.

Although it does not specifically limit as an epoxy (meth) acrylate resin which has a carboxyl group, The epoxy (meth) obtained by making the reaction material of an epoxy compound and unsaturated group containing monocarboxylic acid react with an acid anhydride. Acrylate compounds are suitable.
The epoxy compound, unsaturated group-containing monocarboxylic acid, and acid anhydride can be appropriately selected from known ones. Specific examples include those described in International Publication No. 2012/144521 pamphlet. Each of the epoxy compound, the unsaturated group-containing monocarboxylic acid, and the acid anhydride may be used alone or in combination of two or more.

  Examples of the unsaturated group-containing monocarboxylic acid include (meth) acrylic acid, 2- (meth) acryloyloxyethyl succinic acid, 2- (meth) acryloyloxyethyl phthalic acid, (meth) acryloyloxyethyl hexahydrophthalic acid, (Meth) acrylic acid dimer, β-furfurylacrylic acid, β-styrylacrylic acid, cinnamic acid, crotonic acid, α-cyanocinnamic acid and the like. These unsaturated group-containing monocarboxylic acids may be used alone or in combination of two or more.

Acid anhydrides include maleic anhydride, succinic anhydride, itaconic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylhexahydrophthalic anhydride, endomethylenetetrahydrophthalic anhydride, methylendo Dibasic acid anhydrides such as methylenetetrahydrophthalic acid, chlorendic anhydride, methyltetrahydrophthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenonetetracarboxylic dianhydride, biphenyltetracarboxylic dianhydride, biphenyl Aromatic polycarboxylic acid anhydrides such as ether tetracarboxylic acid, 5- (2,5-dioxotetrahydrofuryl) -3-methyl-3-cyclohexene-1,2-dicarboxylic acid anhydride, endobicyclo- [2 , 2,1] -Hept-5-ene-2,3-dica Polycarboxylic anhydride derivatives such as carbon anhydride, and the like. These may be used alone or in combination of two or more.
The molecular weight of the epoxy (meth) acrylate compound having a carboxyl group thus obtained is not particularly limited, but is preferably 1000 to 40000, more preferably 2000 to 5000.

  The alkali-soluble resin used in the colored resin composition for a color filter of the present invention may be used alone or in combination of two or more thereof. It is usually in the range of 10 to 1000 parts by mass, preferably in the range of 20 to 500 parts by mass with respect to 100 parts by mass of the coloring material contained. If the content of the alkali-soluble resin is too small, sufficient alkali developability may not be obtained, and if the content of the alkali-soluble resin is too large, the ratio of the coloring material is relatively low, which is sufficient. The coloring density may not be obtained.

(Polyfunctional monomer)
The polyfunctional monomer used in the colored resin composition for a color filter of the present invention is not particularly limited as long as it can be polymerized by a photoinitiator described later. Usually, two ethylenically unsaturated double bonds are present. A compound having the above is used, and it is particularly preferably a polyfunctional (meth) acrylate having two or more acryloyl groups or methacryloyl groups.
Such polyfunctional (meth) acrylate may be appropriately selected from conventionally known ones. Specific examples include those described in International Publication No. 2012/144521 pamphlet.

These polyfunctional (meth) acrylates may be used individually by 1 type, and may be used in combination of 2 or more type. When the colored resin composition of the present invention requires excellent photocurability (high sensitivity), the polyfunctional monomer has three (trifunctional) or more polymerizable double bonds. Preferred are poly (meth) acrylates of trihydric or higher polyhydric alcohols and their modified dicarboxylic acids, specifically, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, Succinic acid modified product of pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, succinic acid of dipentaerythritol penta (meth) acrylate Modified product, dipentaerythritol hexa Meth) acrylate are preferable.
Although there is no restriction | limiting in particular in content of the said polyfunctional monomer used in the colored resin composition for color filters of this invention, Usually, about 5-500 mass parts with respect to 100 mass parts of said alkali-soluble resin, Preferably it is 20. It is the range of -300 mass parts. If the content of the polyfunctional monomer is less than the above range, the photocuring may not sufficiently proceed and the exposed part may be eluted, and if the content of the polyfunctional monomer is more than the above range, the alkali developability may be deteriorated. There is.

(Photoinitiator)
There is no restriction | limiting in particular as a photoinitiator used in the colored resin composition for color filters of this invention, From the various photoinitiators known conventionally, it can use 1 type or in combination of 2 or more types. . Specific examples include those described in International Publication No. 2012/144521 pamphlet.

  Content of the photoinitiator used in the colored resin composition of this invention is about 0.01-100 mass parts normally with respect to 100 mass parts of said polyfunctional monomers, Preferably it is 5-60 mass parts. If the content is less than the above range, the polymerization reaction cannot be sufficiently caused, so that the hardness of the colored layer may not be sufficient. In some cases, the content of the coloring material or the like in the solid content is relatively small, and a sufficient coloring density cannot be obtained.

<Optional components>
The colored resin composition of the present invention may contain other color materials and various additives as required, as long as the object of the present invention is not impaired.

(Other color materials)
You may mix | blend another color material as needed for the purpose of control of a color tone. As the other colorant, for example, a conventionally known pigment or dye can be selected according to the purpose, and one or more kinds can be used.
As the other color material, the color material described in International Publication No. 2012/144521 pamphlet including a divalent or higher cation represented by the general formula (I-1) and a divalent or higher anion is used. It is preferable.
Specific examples of other color materials include C.I. I. Pigment violet 1, C.I. I. Pigment violet 2, C.I. I. Pigment violet 3, C.I. I. Pigment violet 19, C.I. I. Pigment violet 23, C.I. I. Pigment violet 29, C.I. I. Pigment violet 32, C.I. I. Pigment violet 36, C.I. I. Pigment violet 38, C.I. I. Pigment violet 39; I. Pigment blue 1, C.I. I. Pigment blue 15, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. Pigment blue 15: 6, C.I. I. Pigment blue 60, C.I. I. Pigment red 81, C.I. I. And pigments such as CI Pigment Red 82 and dyes such as Acid Red.

When other color materials are used, the blending amount is not particularly limited as long as the effect of the present invention is not impaired. When using the color material described in International Publication No. 2012/144521 pamphlet containing a divalent or higher cation represented by the general formula (I-1) and a divalent or higher anion as the other colorant, (A) It is preferable that the color material containing the bivalent or more cation represented by the general formula (I-1) and the divalent or more anion is 85 parts by mass or less with respect to 100 parts by mass of the total color material. More preferably, it is 60 parts by mass or less.
The blending amount of the other color material is preferably 40 parts by mass or less, more preferably 20 parts by mass or less, with respect to (A) 100 parts by mass of the total color material.
Within this range, the color tone can be controlled without impairing the high transmittance characteristics, heat resistance, and light resistance characteristics of the color material represented by the general formula (I). .

(Antioxidant)
The colored resin composition of the present invention preferably further contains an antioxidant from the viewpoint of heat resistance and light resistance. The antioxidant may be appropriately selected from conventionally known antioxidants. Specific examples of antioxidants include, for example, hindered phenol antioxidants, amine antioxidants, phosphorus antioxidants, sulfur antioxidants, hydrazine antioxidants, and the like. From the viewpoint, it is preferable to use a hindered phenol-based antioxidant.
The hindered phenol-based antioxidant contains at least one phenol structure, and has a substituent having 4 or more carbon atoms (hereinafter, “the carbon atom” in at least one of the 2-position and the 6-position of the hydroxyl group of the phenol structure). It means an antioxidant having a structure (hereinafter, sometimes referred to as “hindered phenol structure”) in which “substituent of 4 or more” is sometimes referred to as “hindered group”.

  Hindered phenolic antioxidants capture peroxy radicals at the initial stage of oxidation under high-temperature heating after the coating is formed, donate hydrogen to the peroxy radicals, and slightly stabilize the highly active peroxy radicals. It is presumed that the effect of reducing the amount of peroxy radicals that promotes deterioration of the resin and fading of the dye skeleton is high.

  Examples of the hindered group include an alkyl group having 4 or more carbon atoms and an alkyl group having a substituent having 4 or more carbon atoms as a whole. Specifically, tertiary alkyl groups such as t-butyl group, t-pentyl group and t-hexyl group; secondary alkyl groups such as sec-butyl group and sec-pentyl group; i-butyl group and i-pentyl A branched primary alkyl group such as a group; a cycloalkyl group such as a cyclohexyl group or a cyclopentyl group; an alkyl group substituted with an alkylthio group so as to have 4 or more carbon atoms as a whole. Among these, a tertiary alkyl group is more preferable, and a t-butyl group is particularly preferable from the balance between the reactivity of the phenolic hydroxyl group and the radical and the stability of the phenoxy radical.

In particular, a hindered phenol antioxidant having a structure in which a substituent having 4 or more carbon atoms is substituted on both the 2-position and 6-position of the hydroxyl group of the phenol structure suppresses fading due to heating of the coloring material. It is preferable because of its high effect.
Among them, a hindered phenol antioxidant having two or more hindered phenol structures in one molecule is preferable because it has a high effect of suppressing fading due to heating of the coloring material.

  In the present invention, among the hindered phenol antioxidants, it is preferable that an aromatic nitrogen-containing heterocyclic ring is contained from the viewpoint of high effect of suppressing fading due to heating of the coloring material. In the case of containing an aromatic nitrogen-containing heterocycle, even if the number of hindered phenol structures is one per molecule, the effect of suppressing fading due to heating of the coloring material is high. This is because hindered phenolic antioxidants containing aromatic nitrogen-containing heterocycles are relatively poorly compatible with resins and have a skeleton similar to the dye skeleton of the colorant. It is presumed that it is easy to localize. Examples of the aromatic nitrogen-containing heterocycle include a triazine ring, an imidazole ring, a benzimidazole ring, and the like. Among these, a triazine ring is preferably used.

  The mass average molecular weight Mw of the hindered phenol antioxidant used in the present invention is usually 90 to 3000, preferably 150 to 2000, and more preferably 250 to 1300.

  Examples of the hindered phenol antioxidant contained in the present invention include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (trade name: Irganox 1010, BASF). 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate (trade name: Irganox 3114, manufactured by BASF), 2,4,6-tris (4- Hydroxy-3,5-di-tert-butylbenzyl) mesitylene (trade name: Irganox 1330, manufactured by BASF), 6- (4-hydroxy-3,5-di-tert-butylanilino) -2,4-bis ( Octylthio) -1,3,5-triazine (trade name: Irganox 565, manufactured by BASF), 2,2′-thio Ethyl bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (trade name: Irganox 1035, manufactured by BASF), 1,2-bis [3- (4-hydroxy-3,5 -Di-tert-butylphenyl) propionyl] hydrazine (trade name: Irganox MD1024, manufactured by BASF), octyl 3- (4-hydroxy-3,5-diisopropylphenyl) propionate (trade name: Irganox 1135, manufactured by BASF) ), 4,6-bis (octylthiomethyl) -o-cresol (trade name: Irganox 1520L, manufactured by BASF), N, N′-hexamethylenebis [3- (3,5-di-tert-butyl- 4-hydroxyphenyl) propanamide] (trade name: Irganox 1098, manufactured by BASF), 1 6-hexanediol bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (trade name: Irganox 259, manufactured by BASF), 1-dimethyl-2-[(3-t- (Butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl] 2,4,8,10-tetraoxaspiro [5.5] undecane (trade name: ADK STAB AO-80, manufactured by Adeka), bis (3 -Tert-butyl-4-hydroxy-5-methylbenzenepropionic acid) ethylenebis (oxyethylene) (trade name: Irganox 245, manufactured by BASF), 1,3,5-tris [[4- (1,1- Dimethylethyl) -3-hydroxy-2,6-dimethylphenyl] methyl] -1,3,5-triazine-2,4,6 (1H, 3H, 5 ) -Trione (trade name: Irganox 1790, manufactured by BASF), 2,2′-methylenebis (6-tert-butyl-4-methylphenol) (trade name: Sumilyzer MDP-S, manufactured by Sumitomo Chemical), 6, 6 '-Thiobis (2-tert-butyl-4-methylphenol) (trade name: Irganox 1081, manufactured by BASF), diethyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate (trade name: Irgamod 195) , Manufactured by BASF), 2-tert-butyl-4-methyl-6- (2-hydroxy-3-tert-butyl-5-methylbenzyl) phenyl acrylate (trade name: Sumilizer GM, manufactured by Sumitomo Chemical), 4, 4'-thiobis (6-tert-butyl-m-cresol) (trade name: Sumilizer WX-R, manufactured by Sumitomo Chemical Co., Ltd.) It is below. In addition, oligomer-type and polymer-type compounds having a hindered phenol structure can also be used.

  When using antioxidant, the compounding quantity will not be specifically limited if it is a range by which the effect of this invention is not impaired. As a compounding quantity of antioxidant, it is preferable that antioxidant is 0.1-5.0 mass parts with respect to 100 mass parts of total solids in a colored resin composition, 0.5-4. More preferably, it is 0 parts by mass. If it is more than the said lower limit, it is excellent in heat resistance. On the other hand, if it is below the said upper limit, the colored resin composition of this invention can be made into a highly sensitive photosensitive resin composition.

(Other additives)
In addition to the above antioxidants, other additives include, for example, polymerization terminators, chain transfer agents, leveling agents, plasticizers, surfactants, antifoaming agents, silane coupling agents, UV absorbers, and adhesion. Examples include accelerators.
Specific examples of the surfactant and the plasticizer include those described in International Publication No. 2012/144521 pamphlet.

<Combination ratio of each component in the colored resin composition>
(A) It is preferable to mix | blend the total content of a coloring material in the ratio of 3-65 mass% with respect to solid content whole quantity of a colored resin composition, More preferably, it is 4-55 mass%. If it is more than the said lower limit, the colored layer at the time of apply | coating the colored resin composition to predetermined | prescribed film thickness (usually 1.0-5.0 micrometers) has sufficient color density. Moreover, if it is below the said upper limit, while being excellent in the dispersibility and dispersion stability, the colored layer which has sufficient hardness and adhesiveness with a board | substrate can be obtained. In the present invention, the solid content is everything except the above-mentioned solvent, and includes a liquid polyfunctional monomer.
Further, the content of the (B) dispersant is not particularly limited as long as it can uniformly disperse the color material (A). For example, the content of the solid content of the colored resin composition is not limited. In contrast, 3 to 40% by mass can be used. Furthermore, it is preferable to mix | blend in the ratio of 5-35 mass% with respect to the solid content whole quantity of a coloring resin composition, and it is preferable to mix | blend especially in the ratio of 5-25 mass%. If it is more than the said lower limit, (A) It is excellent in the dispersibility and dispersion stability of a coloring material, and is excellent in storage stability. Moreover, if it is below the said upper limit, developability will become favorable.
(D) It is preferable that the total amount of the binder component is 10 to 92% by mass, preferably 15 to 87% by mass, based on the total solid content of the colored resin composition. If it is more than the said lower limit, the colored layer which has sufficient hardness and adhesiveness with a board | substrate can be obtained. Moreover, if it is below the said upper limit, it is excellent in developability and generation | occurrence | production of the fine wrinkles by heat shrink is also suppressed.
Moreover, what is necessary is just to set suitably content of (C) solvent in the range which can form a colored layer accurately. Usually, it is preferably within a range of 55 to 95% by mass, more preferably within a range of 65 to 88% by mass, based on the total amount of the colored resin composition containing the solvent. When the content of the solvent is within the above range, the coating property can be excellent.

<Method for producing colored resin composition for color filter>
The method for producing a colored resin composition for a color filter according to the present invention comprises (A) a color material, (B) a dispersant, (C) a solvent, (D) a binder component, and various additive components used as desired. It is not particularly limited as long as it is a method in which (A) the color material can be uniformly dispersed in the (C) solvent from the (B) dispersant, and is prepared by mixing using a known mixing means can do.
Examples of the method for preparing the resin composition include (1) a method of mixing (D) the binder component and various additive components used as desired in the colorant dispersion according to the present invention; (2) (C). A method in which (A) a color material, (B) a dispersing agent, (D) a binder component, and various additive components used as desired are simultaneously added and mixed in a solvent; (3) (C) in a solvent And (B) a dispersing agent, (D) a binder component, and various additive components used as desired, and after mixing, (A) a method of adding and mixing a coloring material; .
Among these methods, the method (1) is preferable because it can effectively prevent aggregation of the coloring material and can be uniformly dispersed.

[Color filter]
The color filter according to 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 comprises the colored resin composition according to the present invention. It has a colored layer formed by curing.

  Such a color filter according to 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 has a transparent substrate 1, a light shielding part 2, and a colored layer 3.

(Colored layer)
At least one of the colored layers used in the color filter of the present invention is a colored layer formed by curing the colored resin composition for a color filter according to the present invention.
The colored layer is usually formed in an opening of a light shielding part on a transparent substrate, which will be described later, and is usually composed of three or more colored patterns.
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 thickness of the colored layer is appropriately controlled by adjusting the coating method, solid content concentration, viscosity, and the like of the colored resin composition, but it is usually preferably in the range of 1 to 5 μm.

For example, when the colored resin composition is a photosensitive resin composition, the colored layer can be formed by the following method.
First, the above-described colored resin composition for a color filter of the present invention is applied onto a transparent substrate described later using an application means such as a spray coating method, a dip coating method, a bar coating method, a coal coating method, or a spin coating method. To form a wet paint film.
Next, after drying the wet coating film using a hot plate or oven, it is exposed to light through a mask having a predetermined pattern, and an alkali-soluble resin and a polyfunctional monomer are photopolymerized. A photosensitive coating film is used. Examples of the light source used for exposure include ultraviolet rays such as a low-pressure mercury lamp, a high-pressure mercury lamp, and a metal halide lamp, and an electron beam. The exposure amount is appropriately adjusted depending on the light source used, the thickness of the coating film, and the like.
Moreover, in order to promote a polymerization reaction after exposure, you may heat-process. The heating conditions are appropriately selected depending on the blending ratio of each component in the colored resin composition to be used, the thickness of the coating film, and the like.

Next, it develops using a developing solution, a coating film is formed with a desired pattern by melt | dissolving and removing an unexposed part. As the developer, a solution in which an alkali is dissolved in water or a water-soluble solvent is usually used. An appropriate amount of a surfactant or the like may be added to the alkaline solution. Further, a general method can be adopted as the developing method.
After the development treatment, the developer is usually washed and the cured coating film of the colored resin composition is dried to form a colored layer. In addition, you may heat-process in order to fully harden a coating film after image development processing. The heating conditions are not particularly limited and are appropriately selected depending on the application of the coating film.

(Shading part)
The light shielding part in the color filter of the present invention is formed in a pattern on a transparent substrate described later, and can be the same as that used as a light shielding part in a general color filter.
The pattern shape of the light shielding portion is not particularly limited, and examples thereof include a stripe shape and a matrix shape. Examples of the light-shielding portion include those obtained by dispersing or dissolving a black pigment in a binder resin, and metal thin films such as chromium and chromium oxide. The metal thin film may be a CrO _x film (x is an arbitrary number) and a laminate of two Cr films, and a CrO _x film (x is an arbitrary number) with a reduced reflectance. , CrN _y film (y is an arbitrary number) and three layers of Cr film may be laminated.
When the light shielding part is a material in which a black color material is dispersed or dissolved in a binder resin, the light shielding part can be formed by any method that can pattern the light shielding part, and is not particularly limited. For example, a photolithography method, a printing method, an ink jet method and the like using the colored resin composition for the light shielding part can be exemplified.

  The thickness of the light shielding part is set to about 0.2 to 0.4 μm in the case of a metal thin film, and about 0.5 to 2 μm in the case where a black color material is dispersed or dissolved in a binder resin. Is set.

(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. Specifically, a transparent rigid material having no flexibility such as quartz glass, alkali-free glass, or synthetic quartz plate, or a flexible or flexible resin such as a transparent resin film, an optical resin plate, or flexible glass. A transparent flexible material is mentioned.
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.
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. .

[Liquid Crystal Display]
The liquid crystal display device of the present invention includes the color filter according to the present invention described above, a counter substrate, and a liquid crystal layer formed between the color filter and the counter substrate.
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 according to 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. In addition, the liquid crystal layer can be formed by overlapping the color filter and the counter substrate under reduced pressure and bonding them with a sealant. Thereafter, the sealed liquid crystal can be aligned by slowly cooling the liquid crystal cell to room temperature.

[Organic light emitting display]
An organic light emitting display device according to the present invention includes the above-described color filter according to the present invention and an organic light emitter.
Such an organic light emitting display device of the present invention will be described with reference to the drawings. FIG. 3 is a schematic view illustrating an example of the organic light emitting display device of the present invention. As illustrated in FIG. 3, the organic light emitting display device 100 of the present invention includes a color filter 10 and an organic light emitter 80. An organic protective layer 50 and an inorganic oxide film 60 may be provided between the color filter 10 and the organic light emitter 80.

As a method for laminating the organic light emitter 80, for example, the transparent anode 71, the hole injection layer 72, the hole transport layer 73, the light emitting layer 74, the electron injection layer 75, and the cathode 76 are sequentially formed on the upper surface of the color filter. Examples thereof include a method and a method in which an organic light emitter 80 formed on another substrate is bonded onto the inorganic oxide film 60. As the transparent anode 71, the hole injection layer 72, the hole transport layer 73, the light emitting layer 74, the electron injection layer 75, the cathode 76, and other configurations in the organic light emitting body 80, known structures can be appropriately used. The organic light emitting display device 100 manufactured as described above can be applied to, for example, a passive drive type organic EL display or an active drive type organic EL display.
Note that the organic light emitting display device of the present invention is not limited to the configuration shown in FIG. 3, and may be a known configuration as an organic light emitting display device that generally uses a color filter.

  Hereinafter, the present invention will be specifically described with reference to examples. These descriptions do not limit the present invention.

(Synthesis Example 1: Synthesis of dimerized triarylmethane dye)
Referring to the method for producing intermediate 3 and intermediate 4 described in WO 2012/144521 pamphlet, 15.9 g (yield 70%) of dimerized triarylmethane dye represented by the following chemical formula (1) Obtained.
The obtained compound was confirmed to be the target compound from the following analysis results.
MS (ESI) (m / z): 511 (+), divalent and elemental analysis values: CHN measured value (78.13%, 7.48%, 7.78%); theoretical value (78.06%) , 7.75%, 7.69%)

(Synthesis Example 1: Synthesis of Color Material (Co-Rake Color Material) A1 Consisting of Double Salt Represented by General Formula (I))
As a basic dye, 3.5 g (3.20 mmol) of the dimerized triarylmethane dye obtained in Synthesis Example 1 and 1.5 g (3.13 mmol) of rhodamine B (manufactured by Tokyo Chemical Industry) were added to 300 ml of water, and 90 ° C. To prepare a basic dye solution. As a polyacid, 10.88 g (3.18 mmol) of phosphotungstic acid / n hydrate H ₃ [PW ₁₂ O ₄₀ ] · nH ₂ O (n = 30) (manufactured by Nippon Inorganic Chemical Industry) was put in 100 mL of water, The mixture was stirred at 90 ° C. to prepare an aqueous polyacid solution. The aqueous polyacid solution was added dropwise to the basic dye solution at 90 ° C. over 15 minutes, and further stirred at 90 ° C. for 1 hour. The formed precipitate was collected by filtration and washed with water. The obtained cake was dried to obtain 13.51 g (yield 97.8%) of co-rake colorant A1.
In addition, it was confirmed by ³¹ P-NMR that the polyacid structure of phosphotungstic acid was maintained after the co-rake colorant A1 was formed.

(Synthesis Examples 2 to 6: Synthesis of Coloring Material (Co-Rake Coloring Material) A2, A3, B, C, D Consisting of Double Salt Represented by General Formula (I))
In Synthetic Example 1, except that the basic dye and the polyacid were changed as shown in Table 1, co-rake color materials A2, A3, B, C, and D were prepared in the same manner as in Synthetic Example 1. did.
In addition, it was confirmed by ³¹ P-NMR that the polyacid structures of phosphotungstic acid and phosphotungstomolybdic acid were maintained even after they became lake colors.
In the table, rhodamine A (manufactured by Taoka Chemical Co., Ltd.) and rhodamine B (manufactured by Tokyo Chemical Industry Co., Ltd.) are dyes that become monovalent cations having a xanthene skeleton in which f is 1 in the general formula (I-2). Violet (manufactured by Tokyo Chemical Industry Co., Ltd.) is a dye that becomes a monovalent cation having a triarylmethane skeleton in which f is 0 in the general formula (I-2).

(Synthesis Comparative Examples 1 to 9: Synthesis of co-rake color material E, blue lake color materials A1 to A3, and purple lake color materials A1 to A3, B, and C)
In Synthetic Example 1, except that the basic dye and the polyacid were changed as shown in Table 1, in the same manner as in Synthetic Example 1, the co-rake color material E, the blue lake color materials A1 to A3, and Purple rake color materials A1 to A3, B, and C were prepared. In addition, the co-lake color material E is different from the double salt represented by the general formula (I), and as a cation, Basic Blue 7 (manufactured by Tokyo Chemical Industry) which is a monovalent cation and rhodamine B which is a monovalent cation. And a double salt.
In addition, it was confirmed by ³¹ P-NMR that the polyacid structures of phosphotungstic acid and phosphotungstomolybdic acid were maintained even after they became lake colors.

(Synthesis Example 2: Synthesis of Binder Resin A)
A reactor equipped with a condenser, addition funnel, nitrogen inlet, mechanical stirrer, and digital thermometer was charged with 130 parts by mass of diethylene glycol ethyl methyl ether (abbreviated as EMDG) as a solvent, and the temperature was raised to 110 ° C. in a nitrogen atmosphere. Then, 32 parts by mass of methyl methacrylate, 22 parts by mass of cyclohexyl methacrylate, 24 parts by mass of methacrylic acid, 2 parts by mass of α, α′-azobisisobutyronitrile (abbreviation AIBN) as an initiator and n as a chain transfer agent -The mixture containing 4.5 mass parts of dodecyl mercaptan was dripped continuously over 1.5 hours.
Thereafter, the reaction was continued while maintaining the synthesis temperature, and 0.05 parts by mass of p-methoxyphenol was added as a polymerization inhibitor 2 hours after the completion of the dropping.
Next, while blowing air, 22 parts by mass of glycidyl methacrylate was added, the temperature was raised to 110 ° C., 0.2 parts by mass of triethylamine was added, and an addition reaction was carried out at 110 ° C. for 15 hours. 44 mass% solid content) was obtained.
The obtained binder resin A had a mass average molecular weight Mw of 8,500 and an acid value of 85 mgKOH / g. The mass average molecular weight Mw was calculated by gel permeation chromatography (GPC) using polystyrene as a standard substance and THF as an eluent, and the acid value was measured according to JIS-K0070.

(Synthesis Example 3: Synthesis of Organic Phosphonate Compound 1)
In a reactor equipped with a condenser, addition funnel, nitrogen inlet, mechanical stirrer, digital thermometer, 142.61 parts by mass of diethylene glycol ethyl methyl ether (EMDG) and phenylphosphonic acid (product name “PPA” manufactured by Nissan Chemical Co., Ltd.) ) 50.00 parts by mass and p-methoxyphenol 0.10 parts by mass were charged to 120 ° C. while stirring under a nitrogen stream. Organic phosphonic acid monoester in which 44.96 parts by mass of glycidyl methacrylate (GMA) is added dropwise over 30 minutes and heated and stirred for 2 hours so that half of the divalent acidic group of PPA is esterified with the epoxy group of GMA A 40.0 mass% solution of organic phosphonate ester compound 1 containing the compound was obtained. The progress of the esterification reaction was confirmed by acid value measurement, and the composition ratio of the product was confirmed by ³¹ P-NMR measurement. The acid value was 190 mgKOH / g, and the composition ratio was 55 mass% for the organic phosphonic acid monoester compound, 23 mass% for the organic phosphonic acid diester compound, and 22 mass% for PPA.

(Synthesis Example 4: Preparation of Phosphate Modified Dispersant Solution A)
In a 100 mL eggplant flask, 34.30 parts by mass of PGMEA, a block copolymer containing a tertiary amino group (having a structural unit represented by the above general formula (II) and a structural unit represented by the above general formula (III) (Block copolymer) (trade name: BYK-LPN6919, manufactured by Big Chemie) (amine value 120 mgKOH / g, solid content 60% by mass) 14.25 parts by mass (effective solid content 8.55 parts by mass) Phosphoric acid ("PPA" manufactured by Nissan Chemical Co., Ltd.) 1.45 parts by mass (0.5 molar equivalent to the tertiary amino group of the block copolymer) was added, and phosphoric acid was stirred at 40 ° C for 30 minutes A salt-modified dispersant solution A (solid content: 20% by mass) was prepared. At this time, the amino group of the block copolymer includes a salt formed by an acid-base reaction with an acidic group of PPA.

(Synthesis Example 5: Preparation of phosphate-modified dispersant solution B)
A 100 mL eggplant-shaped flask has 30.07 parts by mass of PGMEA and a block copolymer containing a tertiary amino group (the structural unit represented by the general formula (II) and the structural unit represented by the general formula (III)). Block copolymer) (trade name: BYK-LPN6919, manufactured by Big Chemie) (amine value 120 mgKOH / g, solid content 60% by mass) 10.15 parts by mass (effective solid content 6.09 parts by mass) 9.78 parts by mass (3.91 parts by mass of effective solid content) of organic phosphonic acid ester compound 1 of Synthesis Example 3 (1.0 molar equivalent with respect to the tertiary amino group of the block copolymer) was added at 40 ° C. Was stirred for 30 minutes to prepare a phosphate-modified dispersant solution B (solid content: 20% by mass). At this time, the amino group of the block copolymer includes those in which a salt is formed by an acid-base reaction with the acidic group of the organic phosphonic acid ester compound 1.

(Production Example 1: Preparation of colorant dispersion A)
As color materials, 13.0 parts by mass of co-rake color material A prepared in Synthesis Example 1 and 22.75 parts by mass of phosphate-modified dispersant solution A prepared in Synthesis Example 4 (effective solid content 4.55 parts by mass) ), 13.30 parts by mass of binder resin A of Synthesis Example 2 (5.85 parts by mass of effective solid content) and 50.95 parts by mass of PGMEA were mixed, and 1 with 2 mm zirconia beads as a preliminary dispersion in a paint shaker (manufactured by Asada Tekko). Dispersion was performed for 4 hours with 0.1 mm zirconia beads as the main dispersion for a time, and a colorant dispersion A was obtained.

(Production Examples 2 to 7 and Comparative Production Examples 1 to 9: Preparation of colorant dispersions B to P)
Colorant dispersions B to P were prepared in the same manner as in Production Example 1 except that the colorant and dispersant were changed to those shown in Table 2 below in Production Example 1.

In addition, the symbol in Table 2 is as follows.
Dioxazine pigment (CI Pigment Violet 23, primary particle size 60 nm)
Copper phthalocyanine pigment (CI pigment blue 15: 6, primary particle size 40 nm))
・ N21116: manufactured by Big Chemie, trade name: BYK-LPN21116, acrylic copolymer containing quaternary ammonium salt, solid content 40% by mass)
BYK161: manufactured by Big Chemie, trade name: Disperbyk-161, a dispersant having a polyurethane structure, solid content of 30% by mass)

Example 1
28.57 parts by mass of the colorant dispersion A obtained in Production Example 1, 28.29 parts by mass of the following binder composition A, 43.14 parts by mass of PGMEA, 0.04 parts by mass of a surfactant R08MH (manufactured by DIC), 0.4 parts by mass of silane coupling agent KBM503 (manufactured by Shin-Etsu Silicone) was added and mixed, and pressure filtration was performed to obtain a blue colored resin composition of Example 1.

<Binder composition A (solid content 40% by mass)>
Alkali-soluble resin (Binder resin A of Synthesis Example 2, solid content 44% by mass): 18.18 parts by mass5 to 6-functional acrylate monomer (trade name: Aronix M403, manufactured by Toagosei Co., Ltd.): 8.00 parts by mass Photopolymerization initiator: 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropan-1-one (trade name: Irgacure 907, manufactured by BASF): 3.00 parts by mass / photosensitization Agent: 2,4-diethylthioxanthone (trade name: Kayacure DETX-S, manufactured by Nippon Kayaku Co., Ltd.): 1.00 parts by mass; Solvent: propylene glycol monomethyl ether acetate (PGMEA): 19.82 parts by mass

(Examples 2-7, Comparative Examples 1-9)
In Example 1, the blue colored resin compositions of Examples 2 to 7 and Comparative Examples 1 to 9 were the same as Example 1 except that the colorant dispersion and the binder composition were changed as shown in Tables 3 to 8. I got a thing.

(Example 8)
28.57 parts by mass of the colorant dispersion A obtained in Production Example 1, 27.73 parts by mass of the binder composition A, 43.14 parts by mass of PGMEA, hindered phenol antioxidant (pentaerythritol tetrakis [3- (3 5-di-tert-butyl-4-hydroxyphenyl) propionate], trade name: Irganox 1010, manufactured by BASF): 0.22 parts by mass (2% by mass with respect to the solid content of the binder composition A), surfactant 0.08 parts by mass of R08MH (manufactured by DIC) and 0.4 parts by mass of silane coupling agent KBM503 (manufactured by Shin-Etsu Silicone) were added and mixed, followed by pressure filtration to obtain a blue colored resin composition of Example 8. .

Example 9
In Example 8, the blue colored resin composition of Example 9 was obtained in the same manner as in Example 8 except that the color material dispersion M obtained in Production Example 6 was used instead of the color material dispersion A. It was.

(Evaluation)
<Dispersion performance evaluation>
As an evaluation of the dispersion performance of the color material dispersion used in each example and comparative example, the average particle diameter and shear viscosity of the color material particles in the color material dispersion were measured. The average particle size is measured using Nikkiso's “Nanotrack particle size distribution analyzer UPA-EX150”, and the viscosity is measured using Anton Paar's “Rheometer MCR301” to measure the shear viscosity when the shear rate is 60 rpm. did. Here, the average particle diameter is an average dispersed particle diameter and a volume average particle diameter. A result is combined with Tables 3-9 and shown.

<Optical performance evaluation, heat resistance evaluation>
The blue colored resin composition obtained in each example and comparative example was applied on a glass substrate having a thickness of 0.7 mm (“OA-10G” manufactured by Nippon Electric Glass) using a spin coater. Then, it heat-dried for 3 minutes on an 80 degreeC hotplate. A cured film (blue colored layer) was obtained by irradiating ultraviolet rays of 40 mJ / cm ² using an ultrahigh pressure mercury lamp. The above-mentioned colored substrate was post-baked at 230 ° C. for 60 minutes in a clean oven, and the chromaticity (x, y), luminance (Y) and contrast of the resulting colored film were measured with Olympus “Microspectrophotometer OSP-SP200”. The measurement was performed using “Contrast measuring device CT-1B” manufactured by Aisaka Denki.
The evaluation results are shown in Tables 3-9.

(Summary of results)
A colored resin composition of Examples 1 and 2 containing a colorant composed of a double salt represented by the general formula (I) and a colorant obtained by rakeizing each of the basic dyes used for forming the double salt When compared with the mixed colored resin composition of Comparative Example 1, the colored resin compositions of Examples 1 and 2 containing the colorant composed of the double salt represented by the general formula (I) of the present invention are colored. It has been clarified that a coating film realizing high luminance can be formed even through a high-temperature heating process in the filter manufacturing process. Further, the colorant dispersions A and B containing the colorant composed of the double salt represented by the general formula (I) of the present invention are colors obtained by rakeizing each of the basic dyes used for forming the double salt. Compared with the colorant dispersion C of the comparative example in which the materials were mixed, the dispersed particle size was small. It has been clarified that the colored resin compositions of Examples 1 and 2 containing the colorant dispersions A and B of the present invention also improve the contrast when formed into a coating film. This is because, in the color material comprising the double salt represented by the general formula (I) of the present invention, since the monovalent cation 102 constitutes the end of the molecular aggregate, only the divalent cation 101 is present. It is presumed that the molecular aggregates are suppressed from becoming too large compared to the above, and the dispersibility is excellent.
Further, unlike the double salt represented by the general formula (I), the double salt is a double salt using two kinds of cations, Basic Blue 7 which is a monovalent cation and Rhodamine B which is a monovalent cation. The colored resin composition of Comparative Example 2 containing the lake color material E was inferior because the luminance after the high-temperature heating process was lowered. It is estimated that the co-rake color material E used in the colored resin composition of Comparative Example 2 cannot form a molecular aggregate unlike the color material composed of the double salt represented by the general formula (I) of the present invention. Is done. Moreover, the comparative example 3 and the comparative example 4 containing a pigment are compared with the colored resin composition of Example 1 and 2 containing the coloring material which consists of double salt represented by the said general formula (I) of this invention. The brightness was inferior.
Even if Example 3 and Comparative Example 5, Example 4 and Comparative Example 6, Example 5 and Comparative Example 7, Example 6 and Comparative Example 8, and Example 7 and Comparative Example 9 are compared, Example of a comparative example in which a colored resin composition of an example containing a color material composed of a double salt represented by the formula (I) and a color material obtained by raked each of the basic dyes used for forming the double salt When compared with the colored resin composition, the colored resin composition of the example containing the color material composed of the double salt represented by the general formula (I) of the present invention undergoes a high-temperature heating process in the color filter manufacturing process. It was also revealed that a coating film that achieves high brightness can be formed.
Further, it was revealed that the brightness of the colored resin compositions of Examples 8 and 9 to which an antioxidant was further added was further improved.

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 50 Organic protective layer 60 Inorganic oxide film 71 Transparent anode 72 Hole injection layer 73 Hole transport layer 74 Light emitting layer 75 Electron injection layer 76 Cathode 80 Organic light emitter 100 Organic light emitting display device

Claims (9)

A color material comprising a double salt represented by the following general formula (I).
(In general formula (I), A is an a-valent organic group in which the carbon atom directly bonded to N has no π bond, and the organic group is saturated aliphatic carbonized at least at the terminal directly bonded to N. It represents an aliphatic hydrocarbon group having a hydrogen group or an aromatic group having the aliphatic hydrocarbon group, and O, S, and N may be contained in the carbon chain, and R ^{1 to} R ⁵ are each independent. Represents a hydrogen atom, an alkyl group which may have a substituent or an aryl group which may have a substituent, and R ² and R ³ , R ⁴ and R ⁵ are bonded to form a ring structure. which may be .Ar ¹ may be different even each represents. plurality of R ¹ to R ⁵ and Ar ¹ an aromatic group which may have a substituent the same.
a and c represent a number of 2 or more, and b and d represent a number of 1 or more. e is 0 or 1, and when e is 0, there is no bond. A plurality of e may be the same or different.
B ^c- represents a c-valent polyacid anion.
R ^{6 to} R ⁹ each independently represent a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, and R ⁶ and R ⁷ , R ⁸ and R ⁹ are They may combine to form a ring structure. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent. Y represents a —COOZ group or a —NR ¹⁰ R ^{10 ′} group, and Z represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, or a substituent. Represents an aralkyl group which may have a group, and R ¹⁰ and R ^{10 ′} each independently represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent. R ¹⁰ and R ^{10 ′} may combine to form a ring structure.
f is 0 or 1, and when f is 0, there is no bond. g and h represent a number of 1 or more. )   The color material according to claim 1, wherein the polyacid anion is a polyacid anion containing at least tungsten, and a molar ratio of tungsten to molybdenum in the polyacid anion is 100: 0 to 85:15. (A) a coloring material, (B) a dispersant, and (C) a solvent,
The (A) color material contains a color material composed of a double salt represented by the following general formula (I).
(In general formula (I), A is an a-valent organic group in which the carbon atom directly bonded to N has no π bond, and the organic group is saturated aliphatic carbonized at least at the terminal directly bonded to N. It represents an aliphatic hydrocarbon group having a hydrogen group or an aromatic group having the aliphatic hydrocarbon group, and O, S, and N may be contained in the carbon chain, and R ^{1 to} R ⁵ are each independent. Represents a hydrogen atom, an alkyl group which may have a substituent or an aryl group which may have a substituent, and R ² and R ³ , R ⁴ and R ⁵ are bonded to form a ring structure. which may be .Ar ¹ may be different even each represents. plurality of R ¹ to R ⁵ and Ar ¹ an aromatic group which may have a substituent the same.
a and c represent a number of 2 or more, and b and d represent a number of 1 or more. e is 0 or 1, and when e is 0, there is no bond. A plurality of e may be the same or different.
B ^c- represents a c-valent polyacid anion.
R ^{6 to} R ⁹ each independently represent a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, and R ⁶ and R ⁷ , R ⁸ and R ⁹ are They may combine to form a ring structure. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent. Y represents a —COOZ group or a —NR ¹⁰ R ^{10 ′} group, and Z represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, or a substituent. Represents an aralkyl group which may have a group, and R ¹⁰ and R ^{10 ′} each independently represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent. R ¹⁰ and R ^{10 ′} may combine to form a ring structure.
f is 0 or 1, and when f is 0, there is no bond. g and h represent a number of 1 or more. )   The polyacid anion in the colorant represented by the general formula (I) is a polyacid anion containing at least tungsten, and the molar ratio of tungsten to molybdenum in the polyacid anion is 100: 0 to 85. The colorant dispersion according to claim 3, wherein (A) a coloring material, (B) a dispersant, (C) a solvent, and (D) a binder component, wherein the (A) coloring material is represented by the following general formula (I): A colored resin composition for a color filter, comprising a color material comprising salt.
(In general formula (I), A is an a-valent organic group in which the carbon atom directly bonded to N has no π bond, and the organic group is saturated aliphatic carbonized at least at the terminal directly bonded to N. It represents an aliphatic hydrocarbon group having a hydrogen group or an aromatic group having the aliphatic hydrocarbon group, and O, S, and N may be contained in the carbon chain, and R ^{1 to} R ⁵ are each independent. Represents a hydrogen atom, an alkyl group which may have a substituent or an aryl group which may have a substituent, and R ² and R ³ , R ⁴ and R ⁵ are bonded to form a ring structure. which may be .Ar ¹ may be different even each represents. plurality of R ¹ to R ⁵ and Ar ¹ an aromatic group which may have a substituent the same.
a and c represent a number of 2 or more, and b and d represent a number of 1 or more. e is 0 or 1, and when e is 0, there is no bond. A plurality of e may be the same or different.
B ^c- represents a c-valent polyacid anion.
R ^{6 to} R ⁹ each independently represent a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent, and R ⁶ and R ⁷ , R ⁸ and R ⁹ are They may combine to form a ring structure. X ¹ and X ² each independently represent a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent. Y represents a —COOZ group or a —NR ¹⁰ R ^{10 ′} group, and Z represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, or a substituent. Represents an aralkyl group which may have a group, and R ¹⁰ and R ^{10 ′} each independently represents a hydrogen atom, an alkyl group which may have a substituent, or an aryl group which may have a substituent. R ¹⁰ and R ^{10 ′} may combine to form a ring structure.
f is 0 or 1, and when f is 0, there is no bond. g and h represent a number of 1 or more. )   The polyacid anion in the colorant represented by the general formula (I) is a polyacid anion containing at least tungsten, and the molar ratio of tungsten to molybdenum in the polyacid anion is 100: 0 to 85. The colored resin composition for a color filter according to claim 5, wherein   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 cures the colored resin composition for a color filter according to claim 5 or 6. A color filter comprising a colored layer formed by the step.   8. A liquid crystal display device comprising: the color filter according to claim 7; a counter substrate; and a liquid crystal layer formed between the color filter and the counter substrate.   An organic light emitting display device comprising the color filter according to claim 7 and an organic light emitter.