JP2015232715A - Color material dispersion liquid for color filter, color material, color filter, liquid crystal display device, and organic light-emitting display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color material dispersion liquid for color filter that has excellent heat resistance and can form coatings with high luminance.SOLUTION: A color material dispersion liquid for color filter contains (A) a color material, (B) a dispersant, and (C) a solvent, and the (A) color material includes a specific color material (A-1) and a metallic lake color material of a rhodamine-based acid dye (A-2).

Description

  The present invention relates to a color material dispersion for color filters, a color material, 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 salting dyes is known.
Patent Document 1 discloses a colored photosensitive composition containing a dyed lake pigment as a colored photosensitive composition excellent in heat resistance, light resistance, color characteristics, and transparency. As the dyed lake pigment, Known pigments with color index numbers are listed.
However, the colored layer using the colored photosensitive composition described in Patent Document 1 has insufficient heat resistance and light resistance.

Patent Document 2 discloses a crystal of an acid lake aluminum lake pigment as a pigment having high coloring power and excellent light resistance.
Patent Document 3 discloses a color filter for a color filter having a colorant composed of a copper phthalocyanine blue pigment and a metal lake pigment of a xanthene dye as a blue color composition for a color filter that enables high brightness and a wide color reproduction range. A blue coloring composition is disclosed.

  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. The above color material contains a divalent or higher cation and a divalent or higher anion to form a molecular aggregate, and is excellent in heat resistance. A color filter using the color material has high contrast, solvent resistance and electrical resistance. It is disclosed that it is excellent in reliability.

JP 2001-81348 A JP 2006-152223 A JP 2010-26334 A 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 dioxazine pigments and phthalocyanine pigments that have been conventionally used as other colorants are used, there is a problem that the luminance decreases because the transmittance of the pigments is low. On the other hand, when a dye is used, there is a problem that heat resistance and light resistance are deteriorated, resulting in a decrease in luminance.

The present inventors have found that when an aluminum lake pigment of an acid dye disclosed in Patent Document 2 is used, brightness and heat resistance may be lowered as shown in Comparative Examples described later. Got.
In addition, the present inventors have disclosed C.I. I. In the case of using a xanthene-based basic dye lake pigment such as CI Pigment Red 81, the knowledge that the lake pigment is likely to sublime in a high-temperature heating step during the production of a color filter, as shown in a comparative example described later. Got. When the pigment sublimates from the colored layer of the color filter, not only does the color tone of the colored layer change, but it also adheres to other colored layers and changes the color tone of the other colored layers, reducing the brightness, There was a problem that the contamination of.

  The present invention has been made in view of the above circumstances, and is a color material dispersion for color filters that is excellent in heat resistance and can form a high-brightness coating film. An object is to provide an excellent color material, a high-intensity color filter, a liquid crystal display device having the color filter, and an organic light-emitting display device.

    The color material dispersion for a color filter according to the present invention contains (A) a color material, (B) a dispersant, and (C) a solvent, and the (A) color material has the following general formula (I): A rhodamine-based acid dye, wherein the rhodamine-based acid dye is represented by the following general formula (III): It is a dye.

（一般式（Ｉ）中、Ａは、Ｎと直接結合する炭素原子がπ結合を有しないａ価の有機基であって、当該有機基は、少なくともＮと直接結合する末端に飽和脂肪族炭化水素基を有する脂肪族炭化水素基、又は当該脂肪族炭化水素基を有する芳香族基を表し、炭素鎖中にＯ、Ｓ、Ｎが含まれていてもよい。Ｂ^ｃ−はｃ価のポリ酸アニオンを表す。Ｒ^ｉ〜Ｒ^ｖは各々独立に水素原子、置換基を有していてもよいアルキル基又は置換基を有していてもよいアリール基を表し、Ｒ^ｉｉとＲ^ｉｉｉ、Ｒ^ｉｖとＲ^ｖが結合して環構造を形成してもよい。Ａｒ^１は置換基を有していてもよい２価の芳香族基を表す。複数あるＲ^ｉ〜Ｒ^ｖ及びＡｒ^１はそれぞれ同一であっても異なっていてもよい。
ａ及びｃは２以上の整数、ｂ及びｄは１以上の整数を表す。ｅは０又は１であり、ｅが０のとき結合は存在しない。複数あるｅは同一であっても異なっていてもよい。
一般式（ＩＩＩ）中、Ｒ^１、Ｒ^２、Ｒ^３及びＲ^４は、それぞれ独立に、水素原子、又は、置換基を有していてもよい炭素数１〜２０の直鎖又は分岐状アルキル基を表す。前記アルキル基が有していてもよい置換基は、ハロゲン原子、又はアリール基であり、当該アリール基は、更に置換基としてハロゲン原子や、酸性基又はその塩を有していてもよい。
Ｒ^５は、酸性基又はその塩を表し、ｘは０〜５の整数である。但し、一般式（ＩＩＩ）は、酸性基又はその塩を少なくとも２つ有し、そのうち１つは分子内塩を形成する。）

(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. aliphatic hydrocarbon radical having a hydrogen group, or an aromatic group having the aliphatic hydrocarbon group, O in the carbon chain, S, may be contained N is .B ^c-'s c-valent poly R ^{i to} R ^v each independently represents a hydrogen atom, an optionally substituted alkyl group or an optionally substituted aryl group, R ⁱⁱ and R ⁱⁱⁱ , R good .Ar ¹ be ^iv and ^{R v} are bonded to form a ring structure represents a divalent aromatic group which may have a substituent. plural ^R i to R ^v and Ar ¹ each They may be the same or different.
a and c represent an integer of 2 or more, and b and d represent an integer 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.
In general formula (III), R ¹ , R ² , R ³ and R ⁴ are each independently a hydrogen atom or a linear or branched alkyl having 1 to 20 carbon atoms which may have a substituent. Represents a group. The substituent that the alkyl group may have is a halogen atom or an aryl group, and the aryl group may further have a halogen atom, an acidic group, or a salt thereof as a substituent.
R ⁵ represents an acidic group or a salt thereof, and x is an integer of 0 to 5. However, general formula (III) has at least two acidic groups or salts thereof, one of which forms an inner salt. )

  In the color material dispersion liquid for a color filter of the present invention, the color material (A-2) is an aluminum lake color material of a rhodamine-based acid dye, which is excellent in dispersibility of the color material and heat resistance of the coating film. From the point that sublimation of the coloring material is suppressed.

  In the color material dispersion for a color filter of the present invention, the polyacid anion in the color material (A-1) contains at least tungsten, and the molar ratio of molybdenum to tungsten is 0: 100 to 15:85. Is preferable from the viewpoint of excellent heat resistance and light resistance.

  The colorant according to the present invention is a rhodamine acid dye metal lake colorant, wherein the rhodamine acid dye is a rhodamine acid dye represented by the following general formula (III), and the rake agent is: It is a polyaluminum chloride represented by the general formula (II).

（一般式（ＩＩＩ）中、Ｒ^１、Ｒ^２、Ｒ^３及びＲ^４は、それぞれ独立に、水素原子、又は、置換基を有していてもよい炭素数１〜２０の直鎖又は分岐状アルキル基を表す。前記アルキル基が有していてもよい置換基は、ハロゲン原子、又はアリール基であり、当該アリール基は、更に置換基としてハロゲン原子や、酸性基又はその塩を有していてもよい。
Ｒ^５は、酸性基又はその塩を表し、ｘは０〜５の整数である。但し、一般式（ＩＩＩ）は、酸性基又はその塩を少なくとも２つ有し、そのうち１つは分子内塩を形成する。
一般式（ＩＩ）中、ｎは、２〜２０の整数、ｍは、（ｎ／２）〜（３ｎ−１）の整数である。）

(In General Formula (III), R ¹ , R ² , R ³ and R ⁴ are each independently a hydrogen atom or a linear or branched chain having 1 to 20 carbon atoms which may have a substituent. The substituent which the alkyl group may have is a halogen atom or an aryl group, and the aryl group further has a halogen atom, an acidic group or a salt thereof as a substituent. May be.
R ⁵ represents an acidic group or a salt thereof, and x is an integer of 0 to 5. However, general formula (III) has at least two acidic groups or salts thereof, one of which forms an inner salt.
In general formula (II), n is an integer of 2 to 20, and m is an integer of (n / 2) to (3n-1). )

  The color material of the present invention is a metal lake color material of a rhodamine-based acid dye, and the lake agent is polyaluminum chloride represented by the following general formula (II ′). This is preferable from the viewpoint of excellent heat resistance of the coating film and suppression of sublimation of the color material.

（一般式（ＩＩ’）中、ｎは、２〜１０の整数、ｍは、２ｎ〜（３ｎ−１）の整数である。）

(In General Formula (II ′), n is an integer of 2 to 10, and m is an integer of 2n to (3n−1).)

  The color filter according to the present invention is a color filter including at least a transparent substrate and a colored layer provided on the transparent substrate, and at least one of the colored layers is represented by the following general formula (I): A rhodamine acid dye comprising a color material (A-1) and a rhodamine acid dye metal lake color material (A-2), wherein the rhodamine acid dye is represented by the following general formula (III) It is characterized by.

（一般式（Ｉ）中、Ａは、Ｎと直接結合する炭素原子がπ結合を有しないａ価の有機基であって、当該有機基は、少なくともＮと直接結合する末端に飽和脂肪族炭化水素基を有する脂肪族炭化水素基、又は当該脂肪族炭化水素基を有する芳香族基を表し、炭素鎖中にＯ、Ｓ、Ｎが含まれていてもよい。Ｂ^ｃ−はｃ価のポリ酸アニオンを表す。Ｒ^ｉ〜Ｒ^ｖは各々独立に水素原子、置換基を有していてもよいアルキル基又は置換基を有していてもよいアリール基を表し、Ｒ^ｉｉとＲ^ｉｉｉ、Ｒ^ｉｖとＲ^ｖが結合して環構造を形成してもよい。Ａｒ^１は置換基を有していてもよい２価の芳香族基を表す。複数あるＲ^ｉ〜Ｒ^ｖ及びＡｒ^１はそれぞれ同一であっても異なっていてもよい。
ａ及びｃは２以上の整数、ｂ及びｄは１以上の整数を表す。ｅは０又は１であり、ｅが０のとき結合は存在しない。複数あるｅは同一であっても異なっていてもよい。
一般式（ＩＩＩ）中、Ｒ^１、Ｒ^２、Ｒ^３及びＲ^４は、それぞれ独立に、水素原子、又は、置換基を有していてもよい炭素数１〜２０の直鎖又は分岐状アルキル基を表す。前記アルキル基が有していてもよい置換基は、ハロゲン原子、又はアリール基であり、当該アリール基は、更に置換基としてハロゲン原子や、酸性基又はその塩を有していてもよい。
Ｒ^５は、酸性基又はその塩を表し、ｘは０〜５の整数である。但し、一般式（ＩＩＩ）は、酸性基又はその塩を少なくとも２つ有し、そのうち１つは分子内塩を形成する。）

(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. aliphatic hydrocarbon radical having a hydrogen group, or an aromatic group having the aliphatic hydrocarbon group, O in the carbon chain, S, may be contained N is .B ^c-'s c-valent poly R ^{i to} R ^v each independently represents a hydrogen atom, an optionally substituted alkyl group or an optionally substituted aryl group, R ⁱⁱ and R ⁱⁱⁱ , R good .Ar ¹ be ^iv and ^{R v} are bonded to form a ring structure represents a divalent aromatic group which may have a substituent. plural ^R i to R ^v and Ar ¹ each They may be the same or different.
a and c represent an integer of 2 or more, and b and d represent an integer 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.
In general formula (III), R ¹ , R ² , R ³ and R ⁴ are each independently a hydrogen atom or a linear or branched alkyl having 1 to 20 carbon atoms which may have a substituent. Represents a group. The substituent that the alkyl group may have is a halogen atom or an aryl group, and the aryl group may further have a halogen atom, an acidic group, or a salt thereof as a substituent.
R ⁵ represents an acidic group or a salt thereof, and x is an integer of 0 to 5. However, general formula (III) has at least two acidic groups or salts thereof, one of which forms an inner salt. )

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 dispersion for color filters that is excellent in heat resistance and capable of forming a high-brightness coating film, sublimation is suppressed even during high-temperature heating, color material that has excellent heat resistance, and high-brightness color A filter, a liquid crystal display device having the color filter, and an organic light emitting display device 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.

Hereinafter, the color material dispersion, the colored 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. Color Material Dispersion for Color Filter The color material dispersion for color filter according to the present invention contains (A) a color material, (B) a dispersant, and (C) a solvent. And a color material (A-1) represented by the following general formula (I) and a metal lake color material (A-2) of a rhodamine-based acid dye.

（一般式（Ｉ）中、Ａは、Ｎと直接結合する炭素原子がπ結合を有しないａ価の有機基であって、当該有機基は、少なくともＮと直接結合する末端に飽和脂肪族炭化水素基を有する脂肪族炭化水素基、又は当該脂肪族炭化水素基を有する芳香族基を表し、炭素鎖中にＯ、Ｓ、Ｎが含まれていてもよい。Ｂ^ｃ−はｃ価のポリ酸アニオンを表す。Ｒ^ｉ〜Ｒ^ｖは各々独立に水素原子、置換基を有していてもよいアルキル基又は置換基を有していてもよいアリール基を表し、Ｒ^ｉｉとＲ^ｉｉｉ、Ｒ^ｉｖとＲ^ｖが結合して環構造を形成してもよい。Ａｒ^１は置換基を有していてもよい２価の芳香族基を表す。複数あるＲ^ｉ〜Ｒ^ｖ及びＡｒ^１はそれぞれ同一であっても異なっていてもよい。
ａ及びｃは２以上の整数、ｂ及びｄは１以上の整数を表す。ｅは０又は１であり、ｅが０のとき結合は存在しない。複数あるｅは同一であっても異なっていてもよい。）

(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. aliphatic hydrocarbon radical having a hydrogen group, or an aromatic group having the aliphatic hydrocarbon group, O in the carbon chain, S, may be contained N is .B ^c-'s c-valent poly R ^{i to} R ^v each independently represents a hydrogen atom, an optionally substituted alkyl group or an optionally substituted aryl group, R ⁱⁱ and R ⁱⁱⁱ , R good .Ar ¹ be ^iv and ^{R v} are bonded to form a ring structure represents a divalent aromatic group which may have a substituent. plural ^R i to R ^v and Ar ¹ each They may be the same or different.
a and c represent an integer of 2 or more, and b and d represent an integer 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. )

  The color material dispersion for a color filter according to the present invention uses (A) a color material in combination with the specific color material (A-1) and the color material (A-2). (C) By being dispersed in a solvent, a color material dispersion liquid that is excellent in heat resistance and capable of forming a high-brightness coating film while adjusting to a desired color tone is obtained.

Although it is unclear as an effect | action which exhibits the above effects by said specific combination, it is estimated as follows.
The color material (A-1) has a structure represented by the general formula (I), and is a color material in which a divalent or higher cation and a divalent or higher polyacid anion form a salt. The cation in the general formula (I) has a plurality of color development sites, and the color development sites have the same basic skeleton as that of the basic dye. It has a higher molecular weight and better heat resistance than dyes. The present inventors have further improved the heat resistance of the colorant represented by the general formula (I) by combining a divalent or higher cation and a divalent or higher anion to form a molecular aggregate. This is disclosed in Patent Document 4 above.

On the other hand, when the xanthene dye is used in the colored layer of the color filter, the present inventors sublimate in the high-temperature heating process at the time of manufacturing the color filter even if the xanthene dye is raked. I got the knowledge that there was. As a result of intensive studies based on the above findings, the present inventors have found that among the xanthene dyes, the metal lake colorants of fluorescein dyes and rhodamine basic dyes easily sublime, but the metal lakes of rhodamine acid dyes. The knowledge that it was difficult to sublimate when using a color material was obtained.
The rhodamine acid dye is a derivative of 6-aminoxanthene-3-imine, in which at least two of the hydrogen atoms in the molecule have at least one of an acidic group such as a sulfo group or a carboxy group and a salt thereof. It is a dye which has a structure substituted by and exhibits anionic property.
Such a rhodamine-based acidic dye is presumed to be stabilized and excellent in heat resistance because an imine having a cationic property and an acidic group having an anionic property have an inner salt (betaine) structure. In addition, the rhodamine-based acidic dye has an acidic group that exhibits anionic properties in addition to the intramolecular salt structure described above in one molecule, so that the rhodamine-based acidic dye is laked with a metal cation, When dispersed as fine particles, it is presumed that a strong electrical interaction or acid-base interaction occurs both inside and between the molecules of the rhodamine dye, has excellent heat resistance, and suppresses sublimation. .
The rhodamine-based acid dye is a skeleton having an amino group as a substituent, and a coloring portion of the colorant represented by the general formula (I), that is, a triarylmethane skeleton or a xanthene skeleton having an amino group as a substituent. Since it is a similar skeleton, the spectral characteristics have a high transmittance at a wavelength of 400 to 450 nm as in the colorant represented by the general formula (I). Therefore, the brightness of the color filter can be increased without impairing the high transmittance of the color material (A-1) by using a combination of a metal lake pigment of a rhodamine acid dye and the color material (A-1). There is also an advantage that it is easy to achieve.
From the above, by using the color material (A-1) and the color material (A-2) in combination, it is possible to form a coating film with excellent heat resistance and high brightness while adjusting to a desired color tone. A colorant dispersion can be obtained.

  The color material dispersion for a color filter of the present invention contains at least (A) a color material, (B) a dispersant, and (C) a solvent, and further within a range not impairing the effects of the present invention. , Which may contain other components. Hereinafter, each component of the color material dispersion for a color filter of the present invention will be described in order.

(A) Colorant The colorant (A) used in the colorant dispersion of the present invention is at least a colorant (A-1) represented by the following general formula (I) and a metal lake of a rhodamine acid dye. A coloring material (A-2).

（一般式（Ｉ）中の各符号は、上述のとおりである。）

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

<Coloring material (A-1)>
A in the general formula (I) is an a-valent organic group in which the carbon atom directly bonded to N (nitrogen atom) has no π bond, and the organic group is saturated at least at the terminal directly bonded to N. An aliphatic hydrocarbon group having an aliphatic hydrocarbon group or an aromatic group having the aliphatic hydrocarbon group is represented, and O (oxygen atom), S (sulfur atom), and N (nitrogen atom) are present in the carbon chain. It may be included. 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.
From the viewpoint of easy availability of raw materials, A is preferably divalent. For example, when A is a divalent organic group, a linear, branched or cyclic alkylene group having 1 to 20 carbon atoms, or an aromatic group substituted with 2 alkylene groups having 1 to 20 carbon atoms such as a xylylene group Etc.

The alkyl group in R ^{i to} R ^v is not particularly limited. For example, a linear or branched alkyl group having 1 to 20 carbon atoms can be mentioned, among which a linear or branched alkyl group having 1 to 8 carbon atoms is preferable, and a straight chain having 1 to 5 carbon atoms. A chain or branched alkyl group is more preferred from the viewpoint of ease of production and raw material procurement. Among them, it is particularly preferred alkyl groups in R ⁱ to R ^v 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 ^{i to} R ^v 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 ⁱⁱ and R ⁱⁱⁱ , R ^iv and R ^v are combined to form a ring structure. R ⁱⁱ and R ⁱⁱⁱ , R ^iv and R ^v 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 ^{i to} R ^v are each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a phenyl group, or R ⁱⁱ and R ⁱⁱⁱ , R ^iv and R ^v. It is preferable that they are bonded to form a pyrrolidine ring, a piperidine ring, or a morpholine ring.

R ^{i to} R ^v can each independently have the above structure, and among these, R ⁱ is preferably a hydrogen atom from the viewpoint of color purity, and from the viewpoint of ease of production and raw material procurement, R ⁱⁱ to R ^v More preferably, R ^v are all the same.

The divalent aromatic group in Ar ¹ is not particularly limited. The aromatic group may be a heterocyclic group in addition to an aromatic hydrocarbon group composed of a carbocyclic ring. As an aromatic hydrocarbon in the aromatic hydrocarbon group, in addition to a benzene ring, condensed polycyclic aromatic hydrocarbons such as naphthalene ring, tetralin ring, indene ring, fluorene ring, anthracene ring, phenanthrene ring; biphenyl, terphenyl, Examples thereof include chain polycyclic hydrocarbons such as diphenylmethane, triphenylmethane, and stilbene. The chain polycyclic hydrocarbon may have O, S, and N in the chain skeleton such as diphenyl ether. On the other hand, the heterocyclic ring in the heterocyclic group includes 5-membered heterocycles such as furan, thiophene, pyrrole, oxazole, thiazole, imidazole, and pyrazole; And condensed polycyclic heterocycles such as benzofuran, thionaphthene, indole, carbazole, coumarin, benzo-pyrone, quinoline, isoquinoline, acridine, phthalazine, quinazoline, quinoxaline and the like. These aromatic groups may have a substituent.

  Examples of the substituent that the aromatic group may have include an alkyl group having 1 to 5 carbon atoms and a halogen atom.

Ar ¹ is preferably an aromatic group having 6 to 20 carbon atoms, and more preferably an aromatic group comprising a condensed polycyclic carbocyclic ring 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 ^{i to} R ^v and Ar ¹ present in one molecule may be the same or different. In the case where a plurality of R ^{i to} R ^v and Ar ¹ are the same, the color development site exhibits the same color development, so that the same color as the single color development site can be reproduced, which is preferable from the viewpoint of color purity. On the other hand, when at least one of R ^{i to} R ^v and Ar ¹ is a different substituent, a color obtained by mixing a plurality of types of monomers can be reproduced and adjusted to a desired color. it can.

The anion (B ^c− ) of the colorant (A-1) is a diacid or higher polyacid anion. The polyacid anion may be an isopolyacid ion (M _m O _n ) ^d- or a heteropoly acid ion (X _l M _m O _n ) ^d- . 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, from the viewpoint of high brightness and excellent heat resistance and light resistance, it is preferably a polyacid anion containing at least one of tungsten (W) and molybdenum (Mo), including at least tungsten and containing molybdenum. It is more preferable that it is a good polyacid anion from the viewpoint of heat resistance.

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 ^{_{2-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 containing at least tungsten (W), the content ratio of tungsten and molybdenum is not particularly limited, but the molar ratio of tungsten to molybdenum is 100: 0 to 85:15 because it is particularly excellent in heat resistance. It is preferable that it is 100: 0 to 90:10.
As the polyacid anion (B ^c− ), the above-mentioned polyacid anions can be used alone or in combination of two or more, and when used in combination of two or more, tungsten and molybdenum in the whole polyacid anion The molar ratio is preferably within the above range.

(Other ions)
The color material (A-1) represented by the general formula (I) may be a double salt containing other cations and anions as long as the effects of the present invention are not impaired. Specific examples of such cations include other basic dyes, organic compounds containing functional groups capable of forming salts with anions such as amino groups, pyridine groups, and imidazole groups, sodium ions, potassium ions, and magnesium ions. Metal ions such as calcium ion, copper ion and iron ion. Specific examples of anions include halide ions such as fluoride ions, chloride ions and bromide ions, and anions of inorganic acids. Examples of the anion of the inorganic acid include anions of oxo acids such as phosphate ions, sulfate ions, chromate ions, tungstate ions (WO ₄ ²⁻ ), and molybdate ions (MoO ₄ ²⁻ ).

<Coloring material (A-2)>
The color material dispersion for color filter of the present invention contains a metal lake color material (A-2) of a rhodamine acid dye as a color material.
In the present invention, the rhodamine acid dye is a derivative of 6-aminoxanthene-3-imine, in which at least two of the hydrogen atoms in the molecule are at least one of an acidic group such as a sulfo group and a carboxy group and a salt thereof. It is a dye having a structure substituted by a substituent having an anionic property. Therefore, in the metal lake color material (A-2) of the rhodamine acid dye, the lake color material is composed of the anion of the rhodamine acid dye and the cation of the metal lake agent.
Since the rhodamine-based acidic dye contains an imine moiety exhibiting a cationic property and is anionic as a whole molecule, the substituent having at least one of the acidic group and a salt thereof is usually contained in one molecule. Two or more are included and have at least a pair of intramolecular salts (betaine structure).
In the present invention, since such a rhodamine acid dye is used after being formed into a metal lake, the lake color material is dispersed in a fine particle state in a solvent or a coating film. The dye in the fine particles is aggregated at the molecular level while forming a salt with the lake agent. In the present invention, due to the betaine structure in the rhodamine-based acid dye molecule, electrical interaction, acid-base interaction, and the like are enhanced both inside and between the molecules of the rhodamine-based dye. Is considered to be further improved and sublimation is suppressed.

  As the rhodamine acid dye, it is preferable to have a phenyl group at the 9-position of the xanthene skeleton, and a structure represented by the following general formula (III) is preferably used.

（一般式（ＩＩＩ）中、Ｒ^１、Ｒ^２、Ｒ^３及びＲ^４は、それぞれ独立に、水素原子、アルキル基、アリール基、又はヘテロアリール基を表し、Ｒ^１とＲ^２、Ｒ^３とＲ^４がそれぞれ結合して環構造を形成してもよく、Ｒ^１とキサンテン環の５位の炭素原子、Ｒ^２とキサンテン環の７位の炭素原子、Ｒ^３とキサンテン環の４位の炭素原子、又は、Ｒ^４とキサンテン環の２位の炭素原子がそれぞれ結合して環構造を形成してもよい。
上記アリール基、又はヘテロアリール基が有する水素原子が、酸性基又はその塩、若しくはハロゲン原子で置換されていてもよい。
Ｒ^５は、酸性基又はその塩を表し、ｘは０〜５の整数である。但し、一般式（ＩＩＩ）は、酸性基又はその塩を少なくとも２つ有し、そのうち１つは分子内塩を形成する。）

(In General Formula (III), R ¹ , R ² , R ³ and R ⁴ each independently represent a hydrogen atom, an alkyl group, an aryl group, or a heteroaryl group, and R ¹ and R ² , R ³ and R ⁴ may be bonded to each other to form a ring structure. R ¹ and the carbon atom at the 5-position of the xanthene ring, R ² and the carbon atom at the 7-position of the xanthene ring, R ³ and the carbon at the 4-position of the xanthene ring An atom or R ⁴ and the carbon atom at the 2-position of the xanthene ring may be bonded to each other to form a ring structure.
The hydrogen atom of the aryl group or heteroaryl group may be substituted with an acidic group or a salt thereof, or a halogen atom.
R ⁵ represents an acidic group or a salt thereof, and x is an integer of 0 to 5. However, general formula (III) has at least two acidic groups or salts thereof, one of which forms an inner salt. )

The alkyl group in R ^{1 to} R ⁴ is preferably a linear or branched alkyl group having 1 to 20 carbon atoms which may have a substituent, and a linear or branched alkyl group having 1 to 8 carbon atoms. It is more preferably a group, and more preferably a linear or branched alkyl group having 1 to 5 carbon atoms. The substituent that the alkyl group may have is not particularly limited, and examples thereof include an aryl group and a halogen atom. The aryl group further has a halogen atom, an acidic group, or a salt thereof as a substituent. You may do it.
Among them, the aryl group in R ^{1 to} R ⁴ is preferably an aryl group which may have a substituent having 6 to 20 carbon atoms, and more preferably a group having a phenyl group, a naphthyl group, or the like.
In addition, the heteroaryl group in R ^{1 to} R ⁴ is preferably a heteroaryl group which may have a substituent having 5 to 20 carbon atoms, and includes a nitrogen atom, an oxygen atom, and a sulfur atom as a hetero atom. Those are preferred.
Examples of the substituent that the aryl group or heteroaryl group may have include, for example, an alkyl group having 1 to 5 carbon atoms, a halogen atom, an acidic group or a salt thereof, a hydroxyl group, an alkoxy group, a nitrile group, a carbamoyl group, and a carboxylic acid. An ester group etc. are mentioned.

R ¹ and R ² , R ³ and R ⁴ are bonded to each other to form a ring structure. R ¹ and R ² , R ³ and R ⁴ each form a ring structure through a nitrogen atom. It means being. The ring structure is not particularly limited, and examples thereof include a 5- to 7-membered nitrogen-containing heterocyclic ring, and specific examples include a pyrrolidine ring, a piperidine ring, and a morpholine ring.
R ¹ and the carbon atom at the 5-position of the xanthene ring, R ² and the carbon atom at the 7-position of the xanthene ring, R ³ and the carbon atom at the 4-position of the xanthene ring, or carbon at the 2-position of R ⁴ and the xanthene ring The atoms are bonded to each other to form a ring structure when the above combinations of R ^{1 to} R ⁴ and the carbon atom at a predetermined position of the xanthene ring are respectively linked via a nitrogen atom and a part of the xanthene skeleton. That is formed. The ring structure is not particularly limited, and examples thereof include a 5- to 7-membered nitrogen-containing heterocyclic ring.

Specific examples of the acidic group or a salt thereof include a carboxy group (—COOH), a carboxylate group (—COO ⁻ ), a carboxylate group (—COOM, where M represents a metal atom), a sulfonate group (—SOO). ₃ ^-), a sulfo group _(-SO 3 H), sulfonate _(-SO 3 M, wherein M represents a metal atom), and among them, a sulfonato group (-SO ₃ ^-.), a sulfo group It is preferable to have at least one of (—SO ₃ H) or a sulfonate group (—SO ₃ M). Examples of the metal atom M include a sodium atom and a potassium atom.

  Specific examples of rhodamine acid dyes include Acid Red 50, Acid Red 52, Acid Red 289, Acid Violet 9, Acid Violet 30, Acid Blue 19 and the like.

In the present invention, the metal lake color material of the rhodamine acid dye contains a metal atom as the lake agent. By using a rake agent containing a metal atom, the heat resistance of the coloring material is increased. As such a rake agent, a rake agent containing a metal atom which becomes a divalent or higher valent metal cation is preferable. Specifically, barium chloride, calcium chloride, calcium carbonate, aluminum chloride, aluminum sulfate, aluminum acetate, Examples include lead acetate, magnesium sulfate, zirconium chloride, zirconium sulfate, zirconium carbonate, polyaluminum chloride, and polyaluminum sulfate. Among them, a rake agent containing a metal atom that becomes a trivalent or higher metal cation is more preferable. In the present invention, the rake agent is preferably a rake agent containing aluminum from the viewpoint of easy synthesis of the rake colorant and excellent dispersibility of the rake colorant. That is, the color material used in the present invention is preferably an aluminum lake color material of a rhodamine acid dye.
By using a rake agent containing aluminum that becomes a trivalent cation, it is estimated that the coagulation force is further strong as a rake agent compared to a lake agent containing a metal atom that becomes a divalent metal cation. . Therefore, the solubility of the laked rhodamine-based acidic dye in the solvent is greatly reduced, and the properties become closer to pigments. Therefore, there are advantages that the dispersibility and heat resistance of the color material are excellent, and that the raked color material can be easily collected (filtered out) at the time of color material production.

  As the rake agent containing aluminum, polyaluminum chloride represented by the following general formula (II) is particularly preferable because the heat resistance of the coloring material is excellent and sublimation is suppressed.

（一般式（ＩＩ）中、ｎは、２〜２０の整数、ｍは、（ｎ／２）〜（３ｎ−１）の整数である。）

(In general formula (II), n is an integer of 2 to 20, and m is an integer of (n / 2) to (3n-1).)

  That is, the color material of the present invention is a metal lake color material of a rhodamine acid dye, and the lake agent is polyaluminum chloride represented by the above general formula (II).

In the polyaluminum chloride represented by the general formula (II), the cation valence of the entire polyaluminum chloride decreases as the number of hydroxy groups increases. However, since the properties as aluminum hydroxide are strengthened, it is presumed that the cohesive force as a rake agent is rather strong. Therefore, even if the cation valence of polyaluminum chloride as a whole is 1, it can be used as a rake agent having a strong cohesive force, and the resulting rake colorant is also stronger due to hydrogen bonding between aluminum hydroxides in the cation part. Presumed to be a coloring material. Moreover, the smaller the cation valence of the entire polyaluminum chloride, the easier the rake reaction with the rhodamine-based acid dye proceeds more uniformly, the raked color material has a uniform particle size distribution, and the color material has better dispersibility. Conversely, if the cation valence of the entire polyaluminum chloride is too large, the reaction with the rhodamine acid dye cannot proceed completely, resulting in uneven particle size distribution of the rake colorant, The dispersibility of the resin may decrease.
From the above, by using the polyaluminum chloride represented by the general formula (II), the heat resistance of the coloring material is more excellent and sublimation is further suppressed.

In the polyaluminum chloride represented by the general formula (II), n represents the number of aluminum atoms and is 2 to 20. By using polyaluminum chloride having 2-20 aluminum atoms as a rake agent, the dispersed particle diameter of the color material (A-2) does not become too large, and the dispersibility of the color material (A-2) Can be made good.
In the present invention, it is particularly preferable that n is an integer of 2 to 10.

In the polyaluminum chloride represented by the general formula (II), m represents the number of hydroxy groups (OH ^- groups) and is an integer of (n / 2) to (3n-1). When n is an odd number, the lower limit of m is {(n + 1) / 2} which is the smallest integer within the above range.

Aluminum in the polyaluminum chloride has a trivalent cationic property, and the hydroxy group has a monovalent anionic property. Therefore, the polyaluminum chloride as a whole has a (3 nm) cation property.
In the present invention, the cohesive force is strong, the collection of the coloring material is easy, and the dispersibility of the coloring material is excellent. It is preferable that
Among them, in the polyaluminum chloride represented by the general formula (II), n is an integer of 2 to 10, and m is an integer of 2n to (3n-1). This is preferable from the viewpoint of improving the contrast of the coating film.

  That is, the color material of the present invention is a rhodamine acid dye metal lake color material, and the lake agent is more preferably polyaluminum chloride represented by the following general formula (II ').

（一般式（ＩＩ’）中、ｎは、２〜１０の整数、ｍは、２ｎ〜（３ｎ−１）の整数である。）

(In General Formula (II ′), n is an integer of 2 to 10, and m is an integer of 2n to (3n−1).)

  In addition, the polyaluminum chloride represented by the general formula (II) and the general formula (II ′) further improves the heat resistance of the color material, easily suppresses the sublimation of the color material, and improves the dispersibility of the color material. From the viewpoint of easy improvement, the basicity defined by (m / 3n × 100 (%)) is preferably 15 to 99%, more preferably 60 to 97%, and 70 to 95%. More preferably it is.

The metal lake color material of a rhodamine acid dye can be obtained by mixing a desired rhodamine acid dye and a lake agent containing a desired metal atom in a solvent. Specifically, for example, (1) a desired rhodamine-based acidic dye and a lake agent containing a desired metal atom are added to a solvent in which the dye and the lake agent are soluble, and if necessary (2) A desired rhodamine-based acidic dye solution and a lake agent solution containing a desired metal atom are separately prepared, and the dye solution and the lake are prepared. And a method of mixing the agent solution while heating or cooling as required.
The heating temperature at the time of rake formation is not particularly limited, but when water is used as the solvent, it can be set to 5 to 90 ° C.
The rhodamine-based acid dye may be synthesized with reference to a known method such as a synthesis method described in Yutaka Hosoda “New Dye Chemistry” Gihodo etc., or a commercially available product may be used.

<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 the other colorant include known pigments and dyes, and are not particularly limited as long as the effects of the present invention are not impaired. can do.

The average dispersed particle size of the color material (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 and light resistance, it is preferably in the range of 10 to 200 nm, and more preferably in the range of 20 to 150 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.
Further, in the color material dispersion of the present invention, the mixing ratio of the color material (A-1) and the color material (A-2) may be appropriately set in order to prepare a desired color tone, and is not particularly limited. From the viewpoint of heat resistance, the mass ratio of the coloring material (A-1) to the coloring material (A-2) is preferably 50:50 to 99: 1, and preferably 70:30 to 95: 5. More preferred.

[(B) Dispersant]
In the color material dispersion of the present invention, (A) the color material is used by being dispersed in a solvent with (B) a dispersant. (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.

  Examples of such commercially available dispersants include Disperbyk-2000, 2001, BYK-LPN6919, 21116 (above, manufactured by Big Chemie Japan), Azisper PB821, 881 (manufactured by Ajinomoto Co., Inc.), and the like. be able to. Among these, BYK-LPN6919 and 21116 are preferable from the viewpoint of heat resistance, electrical reliability, and dispersibility.

As the polymer dispersant, among them, a polymer having at least a structural unit represented by the following general formula (IV) from the viewpoint that the colorant (A) can be suitably dispersed and the dispersion stability is good, And 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 a 1 or more urethane bond (-NH-COO-) in 1 molecule.
Hereinafter, the preferable dispersant will be described in detail.

<Polymer having at least a structural unit represented by the following general formula (IV)>
In the present invention, as the dispersant (B), a polymer having at least a structural unit represented by the following general formula (IV) can be suitably used.

（一般式（ＩＶ）中、Ｒ^１１は、水素原子又はメチル基、Ａは、直接結合又は２価の連結基、Ｑは、下記一般式（ＩＶ−ａ）で表される基、又は、置換基を有していても良い、塩形成可能な含窒素複素環基を表す。）

(In the general formula (IV), 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 (IV-a), or a substituted group. Represents a nitrogen-containing heterocyclic group which may have a group and can form a salt.)

（一般式（ＩＶ−ａ）中、Ｒ^１２及びＲ^１３は、それぞれ独立して、水素原子又はヘテロ原子を含んでもよい炭化水素基を表し、Ｒ^１２及びＲ^１３は互いに同一であっても異なっていても良い。）

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

In general formula (IV), A is a direct bond or a bivalent coupling group. The direct bond means that Q is directly bonded to the carbon atom in the general formula (IV) without passing through 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 (IV) is preferably a direct bond, a -CONH- group, or a divalent linking group containing a -COO- group.

  Moreover, it can use especially suitably by salt-forming the structural unit represented by the said general formula (IV) of these dispersing agents by the following salt forming agent in arbitrary ratios.

As the polymer having the structural unit represented by the general formula (IV), among others, WO2011 / 108495 pamphlet, JP2013-054200A, JP2010-237608A, JP2011-75661A. The block copolymer and graft copolymer having the structure described in 1. can improve the dispersibility and dispersion stability of the coloring material and the heat resistance of the resin composition, and can form a colored layer with high brightness and high contrast. To preferred.
Moreover, BYK-LPN6919 etc. are mentioned as a commercial item of the polymer which has a structural unit represented by general formula (IV).

(Salt forming agent)
A preferred dispersant of the present invention is a polymer in which at least a part of the nitrogen moiety of the structural unit represented by the general formula (IV) forms a salt (hereinafter sometimes referred to as salt modification).
In the present invention, a salt forming agent is used to form a salt at the nitrogen site of the structural unit represented by the general formula (IV). By doing so, the dispersibility and dispersion stability of the color material are improved. As the salt forming agent, acidic organic phosphorus compounds, organic sulfonic acid compounds, quaternizing agents and the like described in WO2011 / 108495 pamphlet and JP2013-054200A can be suitably used. In particular, when the salt-forming agent is an acidic organic phosphorus compound, the surface of the coloring material is phosphate because the salt-forming site containing the acidic organic phosphorus compound of the dispersant is localized on the particle surface of the coloring material. Since it is in a coated state, attack (hydrogen abstraction) of the coloring material by the active oxygen to the dye skeleton is suppressed, and the heat resistance and light resistance of the coloring material including the dye skeleton are improved. For this reason, when a polymer salt-modified with an acidic organic phosphorus compound is used as a dispersant, fading during high-temperature heating can be further suppressed in a state in which the colorant (A) with high transmittance used in the present invention is well dispersed. Thus, a colored layer with higher luminance can be formed even through a high-temperature heating process in the color filter manufacturing process.

<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.

  Examples of commercially available urethane dispersants include Disperbyk-161, 162, 163, 164, 167, 168, 170, 171, 174, 182, 183, 184, 185, BYK-9077 (above, Big Chemie Japan Co., Ltd.) Product), Ajisper 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 50% 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, the 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. Any method can be used as long as it can be uniformly dispersed in a solvent by a dispersant, and can be prepared by mixing using a known mixing means.

  As a method for preparing the dispersion, (B) the dispersant is mixed and stirred in the (C) solvent to prepare a dispersant solution, and then the (A) colorant and other materials as necessary are added to the dispersant solution. A dispersion can be prepared by mixing the components and dispersing them using a known stirrer or disperser. Moreover, the color material dispersion liquid in which the color material (A-1) is dispersed and the color material dispersion liquid in which the color material (A-2) is dispersed are separately prepared, and these are mixed, whereby the color of the present invention. A material dispersion may be used.

  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 5.0 μm after dispersion.

2. Color filter colored resin composition The color filter color resin composition may be obtained by adding (D) a binder component to the color filter colorant dispersion according to the present invention.
That is, (A) a color material, (B) a dispersant, (C) a solvent, and (D) a binder component, and the (A) color material is represented by the general formula (I). It can be set as the colored resin composition for color filters containing a material (A-1) and the metal lake color material (A-2) of a rhodamine type | system | group acid dye. The colored resin composition for a color filter has excellent heat resistance, sublimation is suppressed even during high-temperature heating, and a high-luminance colored layer can be formed.

The colored resin composition contains (A) a color material, (B) a dispersant, (C) a solvent, and (D) a binder component, and contains other components as necessary. It may be.
Hereinafter, such a colored resin composition for a color filter will be described, but (A) the color material, (B) the dispersant, and (C) the solvent are the same as the color material dispersion according to the present invention. Therefore, the description here is omitted.

[(D) Binder component]
The colored resin composition for a color filter contains a binder component in order to impart film formability and adhesion to the coated surface. 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 can be selectively attached in a pattern on a substrate to form a colored layer, for example, when used in an inkjet method, developability is required for the curable binder component. Absent. 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, 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 an acidic group, acts as a binder resin, and is appropriately selected and used as long as it is soluble in a developer used for pattern formation, particularly preferably an alkali developer. be able to.
The preferred alkali-soluble resin in the present invention is preferably a resin having a carboxyl group as an acidic group. Specifically, an acrylic copolymer having a carboxyl group, an epoxy (meth) acrylate resin having a carboxyl group, etc. Can be mentioned. 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.

  The alkali-soluble resin used in the colored resin composition for color filters may be used alone or in combination of two or more, and the content thereof is a color contained in the colored resin composition. 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 material. 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 is not particularly limited as long as it can be polymerized by a photoinitiator described later, and usually has two or more ethylenically unsaturated double bonds. In particular, polyfunctional (meth) acrylates having two or more acryloyl groups or methacryloyl groups are preferable.
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, Usually, about 5-500 mass parts with respect to 100 mass parts of said alkali-soluble resin, Preferably it is 20-300 masses. Part range. 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, It can use combining 1 type (s) or 2 or more types from the conventionally well-known various photoinitiators. Specific examples include those described in International Publication No. 2012/144521 pamphlet.

  Content of the photoinitiator used in the colored resin composition for color filters 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 for color filters may contain other color materials and various additives as necessary.

(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 colorant, the colorant described in International Publication No. 2012/144521 pamphlet including a divalent or higher cation represented by the general formula (II) and a divalent or higher anion may be used. 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 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 using other color materials, the blending amount is not particularly limited. Among these, when using the color material described in International Publication No. 2012/144521 pamphlet containing a divalent or higher cation represented by the general formula (II) and a divalent or higher anion as the other colorant. , Can be suitably used in any proportion.
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 for a color filter 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 antioxidant contains at least one phenol structure, and has a structure in which a substituent having 4 or more carbon atoms is substituted on at least one of the 2-position and 6-position of the hydroxyl group of the phenol structure. Means an antioxidant.

  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, a colored resin composition can be used as a highly sensitive photosensitive resin composition.

(Other additives)
As additives, in addition to the above antioxidants, for example, polymerization terminators, chain transfer agents, leveling agents, plasticizers, surfactants, antifoaming agents, silane coupling agents, ultraviolet absorbers, adhesion promoters, etc. Is mentioned.
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 includes (A) a color material, (B) a dispersant, (C) a solvent, (D) a binder component, and various additive components used as desired. (A) The coloring material may be any method that can be uniformly dispersed in the solvent (C) from the dispersing agent (B), and is not particularly limited, and can be prepared by mixing using a known mixing means. it can.
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.

4). Color filter The color filter according to the present invention is a color filter including at least a transparent substrate and a colored layer provided on the transparent substrate, and at least one of the colored layers is represented by the following general formula (I). And a metal lake color material (A-2) of a rhodamine acid dye.

（一般式（Ｉ）における各符号は、上記のとおりである。）

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

  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 comprises a color material (A-1) represented by the general formula (I) and a metal lake color material (A-2) of a rhodamine acid dye. It is a colored layer containing.
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, the solid content concentration, the viscosity, and the like of the colored resin composition for a color filter, but is usually preferably in the range of 1 to 5 μm.

For example, when the colored resin composition for a color filter is a photosensitive resin composition, the colored layer can be formed by the following method. The colored layer containing the color material (A-1) represented by the general formula (I) used in the color filter of the present invention and the metal lake color material (A-2) of a rhodamine acid dye is described above. (A) a color material, (B) a dispersant, (C) a solvent, and (D) a binder component, wherein the (A) color material is represented by the general formula (I) ( A-1) and a rhodamine acid dye metal lake colorant (A-2) are preferably used to form the color filter colored resin composition, and the color filter colored resin composition A cured product is preferred.
First, a colored resin composition for a color filter is applied on a transparent substrate, which will be described later, using a coating means such as a spray coating method, a dip coating method, a bar coating method, a call coating method, a spin coating method, and the like. To form.
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. .

5. Liquid Crystal Display Device A liquid crystal display device according to 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 drive 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. 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.

6). Organic Light-Emitting Display Device An organic light-emitting display device according to the present invention includes the color filter according to the present invention described above and an organic light-emitting body.
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 triarylmethane-based lake color material A)
(1) Synthesis of Intermediate 1 Referring to the method for producing Intermediate 3 and Intermediate 4 described in International Publication No. 2012/144521, 15.9 g of intermediate 1 represented by the following chemical formula (1) was obtained. Rate 70%).
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%)

(2) Synthesis of Triarylmethane Lake Coloring Material A The intermediate 1 (5.00 g, 4.58 mmol) was added to 300 ml of water and dissolved at 90 ° C. to obtain an intermediate 1 solution. Next, 10.44 g (3.05 mmol) of phosphotungstic acid · n hydrate H ₃ [PW ₁₂ O ₄₀ ] · nH ₂ O (n = 30) manufactured by Nippon Inorganic Chemical Industry Co., Ltd. was placed in 100 ml of water and stirred at 90 ° C. An aqueous phosphotungstic acid solution was prepared. The aqueous phosphotungstic acid solution prepared in the intermediate 1 solution was mixed at 90 ° C., and the formed precipitate was collected by filtration and washed with water. The obtained cake was dried to obtain 13.25 g (yield 98%) of a triarylmethane-based lake coloring material A represented by the following chemical formula (2).
The obtained compound was confirmed to be the target compound from the following analysis results. (Molar ratio W / Mo = 100/0)
MS (ESI) (m / z): 510 (+), divalent, elemental analysis value: CHN measured value (41.55%, 5.34%, 4.32%); theoretical value (41.66%) (5.17%, 4.11%)

(Reference Synthesis Example 2: Synthesis of Coloring Material A)
Acid Red 289 (manufactured by Tokyo Chemical Industry Co., Ltd., 5.0 g of rhodamine acid dye (the following chemical formula (3)) was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution.Aluminum sulfate (manufactured by Kanto Chemical Co., Inc.) 1 .24 g was put into 200 ml of water and stirred at 40 ° C. to prepare an aluminum sulfate aqueous solution, the dye solution was allowed to cool to 40 ° C., and the prepared aluminum sulfate aqueous solution was dropped into the dye solution over 15 minutes at 40 ° C. The mixture was further stirred for 1 hour at 40 ° C. The resulting precipitate was collected by filtration and washed with water, and the resulting cake was dried to give 2.38 g of a rhodamine acid dye metal lake colorant A (yield 44). 0.9%).

(Reference Synthesis Example 3: Synthesis of Color Material B)
5.0 g of Acid Red 289 was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution. Anhydrous calcium chloride (manufactured by Wako Pure Chemical Industries, Ltd.) 4.10 g was placed in 200 ml of water and stirred at 40 ° C. to prepare an aqueous calcium chloride solution. The dye solution was allowed to cool to 40 ° C., and the prepared calcium chloride aqueous solution was added dropwise to the dye solution at 40 ° C. over 15 minutes, and the mixture was further stirred at 40 ° C. for 1 hour. The formed precipitate was collected by filtration and washed with water. The obtained cake was dried to obtain 2.24 g (yield 35.5%) of a metal lake color material B of a rhodamine acid dye.

(Reference Synthesis Example 4: Synthesis of Color Material C)
5.0 g of Acid Red 289 was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution. Polyaluminum chloride ( "Product Name: Water for polyaluminum chloride" manufactured by Tosoh _{Corporation, [Al 2 (OH) n} Cl (6-n)] m (n = 1~5, m = 10 or less), basicity 53. 36.77 g (9% by mass, 10.2% by mass as alumina content) was placed in 200 ml of water and stirred at 80 ° C. to prepare an aqueous polyaluminum chloride solution. The prepared polyaluminum chloride aqueous solution was added dropwise to the dye solution at 80 ° C. over 15 minutes, and further stirred at 80 ° C. for 1 hour. The formed precipitate was collected by filtration and washed with water. The obtained cake was dried to obtain 8.28 g (yield 65.6%) of a metal lake color material C of a rhodamine acid dye.

(Reference Synthesis Example 5: Synthesis of Color Material D)
5.0 g of Acid Red 289 was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution. 3.49 g of polyaluminum chloride (“trade name: Tan White” manufactured by Taki Chemical Co., Ltd., Al ₄ (OH) ₉ Cl ₃ , basicity 74.5% by mass, 23% by mass as alumina content) was put in 200 ml of water, The mixture was stirred at 80 ° C. to prepare a polyaluminum chloride aqueous solution. The prepared polyaluminum chloride aqueous solution was added dropwise to the dye solution at 80 ° C. over 15 minutes, and further stirred at 80 ° C. for 1 hour. The formed precipitate was collected by filtration and washed with water. The obtained cake was dried to obtain 5.88 g (yield: 91.2%) of a metal lake color material D of a rhodamine acid dye.

(Reference Synthesis Example 6: Synthesis of coloring material E)
5.0 g of Acid Red 289 was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution. 3.85 g of polyaluminum chloride (“trade name: Takibaine # 1500” manufactured by Taki Chemical Co., Ltd., Al ₂ (OH) ₅ Cl, basicity 83.5 mass%, alumina content 23.5 mass%) in 200 ml of water The mixture was stirred at 80 ° C. to prepare a polyaluminum chloride aqueous solution. The prepared polyaluminum chloride aqueous solution was added dropwise to the dye solution at 80 ° C. over 15 minutes, and further stirred at 80 ° C. for 1 hour. The formed precipitate was collected by filtration and washed with water. The obtained cake was dried to obtain 6.30 g (yield 96.2%) of a metal lake color material E of a rhodamine acid dye.

(Synthesis Example 7: Synthesis of Color Material F)
Acid Red 52 (manufactured by Tokyo Chemical Industry Co., Ltd., Rhodamine-based acidic dye (the following chemical formula (4)) 5.0 g was added to 500 ml of water and dissolved at 80 ° C., to prepare a dye solution. The dye solution was cooled to 5 ° C. in an ice bath, and the prepared polyaluminum chloride solution was dropped into the dye solution at 5 ° C. over 15 minutes, and further at 5 ° C. for 1 hour. The resulting precipitate was collected by filtration and washed with water, and the resulting cake was dried to obtain 6.21 g (yield 90.0%) of a metal lake color material F of a rhodamine-based acid dye. .

(Comparative Synthesis Example 1: Synthesis of Color Material G)
Acid Red 87 (manufactured by Tokyo Chemical Industry Co., Ltd., fluorescein dye (the following chemical formula (5)) 5.0 g was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution. The mixture was stirred at 80 ° C. to prepare a polyaluminum chloride aqueous solution, which was added dropwise to the dye solution at 80 ° C. over 15 minutes, and further stirred at 80 ° C. for 1 hour. The product was collected by filtration, washed with water, and the obtained cake was dried to obtain 5.07 g (yield 74.9%) of coloring material G.

(Comparative Synthesis Example 2: Synthesis of Color Material H)
Acid Red 92 (manufactured by Tokyo Chemical Industry Co., Ltd., 5.0 g of fluorescein dye (the following chemical formula (6)) was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution. The mixture was stirred at 80 ° C. to prepare a polyaluminum chloride aqueous solution, which was added dropwise to the dye solution at 80 ° C. over 15 minutes, and further stirred at 80 ° C. for 1 hour. The product was collected by filtration, washed with water, and the obtained cake was dried to obtain 5.12 g (yield 79.1%) of coloring material H.

(Comparative Synthesis Example 3: Synthesis of Color Material I)
Acid Red 94 (manufactured by Tokyo Chemical Industry Co., Ltd., fluorescein dye (the following chemical formula (7)) 5.0 g was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution. The mixture was stirred at 80 ° C. to prepare a polyaluminum chloride aqueous solution, which was added dropwise to the dye solution at 80 ° C. over 15 minutes, and further stirred at 80 ° C. for 1 hour. The product was collected by filtration, washed with water, and the obtained cake was dried to obtain 5.27 g (yield: 85.0%) of coloring material I.

(Comparative Synthesis Example 4: Synthesis of Color Material J)
Rhodamine 6G (manufactured by Tokyo Chemical Industry Co., Ltd., Rhodamine basic dye (the following chemical formula (8)) 5.0 g was added to 500 ml of water and dissolved at 90 ° C. to prepare a dye solution. ₃ [PW ₁₂ O ₄₀ ] · nH ₂ O (n = 30) (manufactured by Nippon Inorganic Chemical Industry Co., Ltd.) 11.90 g was placed in 200 ml of water and stirred at 90 ° C. to prepare an aqueous phosphotungstic acid solution at 90 ° C. The solution was added dropwise to the dye solution over 15 minutes, and further stirred for 1 hour at 90 ° C. The formed precipitate was collected by filtration and washed with water, and the obtained cake was dried to obtain 13.45 g of coloring material J ( The yield was 91.9%).

(Comparative Synthesis Example 5: Synthesis of Color Material K)
Acid Violet 17 (manufactured by Aldrich, triphenylmethane dye (the following chemical formula (9)) (5.0 g) was added to water (500 ml) and dissolved at 80 ° C. to prepare a dye solution. The mixture was stirred at 40 ° C. to prepare a polyaluminum chloride aqueous solution, the dye solution was allowed to cool to 40 ° C., and the prepared polyaluminum chloride aqueous solution was added dropwise to the dye solution at 40 ° C. over 15 minutes. The resulting precipitate was collected by filtration and washed with water, and the obtained cake was dried to obtain 3.75 g of colorant K (yield 60.4%).

(Comparative Synthesis Example 6: Synthesis of Color Material L)
Direct Red 39 (manufactured by Tokyo Chemical Industry Co., Ltd., 5.0 g of azo dye (the following chemical formula (10)) was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution. The mixture was stirred at 80 ° C. to prepare a polyaluminum chloride aqueous solution, which was added dropwise to the dye solution at 80 ° C. over 15 minutes, and further stirred at 80 ° C. for 1 hour. The product was collected by filtration, washed with water, and the obtained cake was dried to obtain 4.31 g of colorant L (yield 64.0%).

(Comparative Synthesis Example 7: Synthesis of Color Material M)
Acid Blue 74 (manufactured by Tokyo Chemical Industry Co., Ltd., indigo dye (the following chemical formula (11)) 5.0 g was added to 500 ml of water and dissolved at 80 ° C. to prepare a dye solution. The polyaluminum chloride aqueous solution was prepared by stirring at 80 ° C. The prepared polyaluminum chloride aqueous solution was dropped into the dye solution at 80 ° C. over 15 minutes, and further stirred at 80 ° C. for 1 hour. The resulting cake was dried to obtain 6.18 g of colorant M (yield 67.2%).

(Synthesis Example 8: 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 90 ° C. in a nitrogen atmosphere. After that, a mixture containing 32 parts by mass of methyl methacrylate, 22 parts by mass of cyclohexyl methacrylate, 24 parts by mass of methacrylic acid, 2.0 parts by mass of AIBN as an initiator and 4.5 parts by mass of n-dodecyl mercaptan as a chain transfer agent. It 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 8500, a number average molecular weight (Mn) of 4200, a molecular weight distribution (Mw / Mn) of 2.02, and an acid value of 85 mgKOH / g.

(Synthesis Example 9 Synthesis of Organic Phosphonate Compound A)
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” Nissan Chemical Co., Ltd.) (Made) 50.00 mass parts and p-methoxyphenol 0.10 mass part were prepared, and it heated to temperature 120 degreeC, stirring under 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% for the organic phosphonic acid monoester compound, 23% by mass for the organic phosphonic acid diester compound, and 22% by mass for PPA.

(Preparation Example 1: Preparation of salt type block polymer dispersant A solution)
In the reactor, 60.74 parts by mass of PGMEA, a block copolymer containing a tertiary amino group (trade name: BYK-LPN6919, manufactured by Big Chemie) (amine value 120 mgKOH / g, solid content 60% by weight) 35.64 parts by mass (21.38 parts by mass of effective solid content) were dissolved, 3.62 parts by mass of PPA (0.5 molar equivalent to the tertiary amino group of the block copolymer) was added, and the mixture was stirred at 40 ° C. for 30 minutes. Thus, a salt type block polymer dispersant A solution (solid content: 25%) was prepared.

(Preparation Example 2: Preparation of salt type block polymer dispersant B solution)
In the reactor, 50.19 parts by mass of PGMEA and 25.38 parts by mass of BYK-LPN6919 (effective solid content 15.23 parts by mass) were respectively dissolved, and 24.44 parts by mass of the organic phosphonic acid ester compound A of Synthesis Example 9 ( (Effective solid content 9.78 parts by mass) (1.0 molar equivalent with respect to the tertiary amino group of the block copolymer) was added and stirred at 40 ° C. for 30 minutes to obtain a salt-type block polymer dispersant B solution (solid Min 25%) was prepared.

(Preparation Example 3: Preparation of binder composition A)
19.82 parts by mass of PGMEA, 18.18 parts by mass of binder resin A (solid content: 44% by mass) of Synthesis Example 8, 5-6 functional acrylate monomer (trade name: Aronix M403, manufactured by Toagosei Co., Ltd.), 8.00 parts by mass, 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropan-1-one (trade name: Irgacure 907, manufactured by BASF) 3.00 parts by mass, 2,4 diethylthioxanthone (trade name: Binder composition A (solid content 40% by mass) was prepared by mixing 1.00 parts by mass of Kayacure DETX-S (manufactured by Nippon Kayaku Co., Ltd.).

(Reference Example 1)
(1) Preparation of colorant dispersion A 12.15 parts by mass of triarylmethane lake colorant A of Synthesis Example 1 and 0.85 parts by mass of metal lake colorant A of rhodamine acid dye of Reference Synthesis Example 2, 20.80 parts by mass (effective solid content 5.20 parts by mass) of the salt-type block polymer dispersant A solution prepared in Preparation Example 1 and 11.82 parts by mass of binder resin A in Synthesis Example 8 (effective solid content 5.20) Parts by weight) and 54.38 parts by weight of PGMEA are mixed, dispersed for 1 hour with 2 mm zirconia beads as a pre-dispersion in a paint shaker (manufactured by Asada Tekko), and further dispersed for 6 hours with 0.1 mm zirconia beads as a main dispersion. Liquid A was obtained.

(2) Preparation of colored resin composition A 28.57 parts by mass of colorant dispersion A obtained in (1) above, 28.29 parts by mass of binder composition A obtained in Preparation Example 3, and 43.14 PGMEA Part by weight, 0.08 parts by mass of surfactant R08MH (manufactured by DIC) and 0.4 parts by mass of silane coupling agent KBM503 (manufactured by Shin-Etsu Silicone) are added and mixed, subjected to pressure filtration, and a blue colored resin composition Product A was obtained.

(Reference Examples 2-7, Example 8)
(1) Preparation of Colorant Dispersions B to H In Reference Example 1 (1), colors were changed in the same manner as in Reference Example 1 (1) except that the constituent components were changed to those shown in Table 1 below. Material dispersions B to H were prepared.
(2) Preparation of Colored Resin Compositions B to H Reference Example 1 except that the color material dispersions B to H obtained above were used in place of the color material dispersion A in (2) of Reference Example 1. In the same manner as in (2), blue colored resin compositions B to H were obtained.

(Comparative Examples 1-10)
(1) Preparation of coloring material dispersions I to R In (1) of Reference Example 1, the components were changed in the same manner as (1) of Reference Example 1 except that the constituent components were changed to those shown in Table 1 below. Material dispersions I to R were prepared.
(2) Preparation of Colored Resin Compositions I to R Example 1 except that in Example 2 (2), instead of the color material dispersion A, the color material dispersions I to R obtained above were used. In the same manner as in (2), blue colored resin compositions I to R were obtained.
In Table 1, “phthalocyanine pigment” is Pigment Blue 15: 6, “dioxazine pigment” is Pigment Bio Red 23, and “urethane dispersant” is Disperbyk-161 (solid content 30) manufactured by BYK Chemie. Mass%).

(Evaluation)
<Dispersion performance evaluation>
As an evaluation of the dispersion performance of the color material dispersion used in each example, reference 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 “Nanotrack particle size distribution analyzer UPA-EX150” manufactured by Nikkiso Co., Ltd., and the viscosity is measured using “Rheometer MCR301” manufactured by Anton Paar. The shear viscosity when the shear rate is 60 rpm. Was measured. Here, the average particle diameter is an average dispersed particle diameter and a volume average particle diameter. The results are shown in Table 2.

<Optical performance evaluation, heat resistance evaluation>
The blue colored resin composition obtained in each example, reference example and comparative example was applied on a glass substrate having a thickness of 0.7 mm (“OA-10G” manufactured by Nippon Electric Glass Co., Ltd.) 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 film thickness after drying and curing is set to target chromaticity y = 0.082, and chromaticity (x, y), luminance (Y), L, a, b (L ₀ , a ₀ ) of the obtained colored substrate. , B ₀ ) was measured using “Microspectroscope OSP-SP200” manufactured by Olympus. The substrate on which the colored film was formed was post-baked for 30 minutes in a clean oven at 230 ° C., and the chromaticity (x, y), luminance (Y), and L, a, b (L ₁ ) of the obtained colored film. , A ₁ , b ₁ ) Measured again, and further the contrast value was measured using “Contrast measuring device CT-1B” manufactured by Aisaka Electric Co., Ltd.
As the heat resistance evaluation, the color difference (ΔEab) before and after post-baking was calculated from the following formula. If ΔEab is 5 or less, the heat resistance is excellent.
ΔEab = {(L ₁ −L ₀ ) ² + (a ₁ −a ₀ ) ² + (b ₁ −b ₀ ) ² } ^1/2
The results are shown in Table 2.

<Color transfer evaluation>
The blue colored resin composition obtained in each example, reference example and comparative example was applied onto a 0.7 mm thick glass substrate (“OA-10G” manufactured by Nippon Electric Glass Co., Ltd.) using a spin coater. Then, it was heated and dried on an 80 ° C. hot plate for 3 minutes. This colored layer was irradiated with ultraviolet rays of 40 mJ / cm ² using a super high pressure mercury lamp through a photomask on which a stripe pattern of 80 μm lines and spaces was drawn. Thereafter, the glass plate on which the colored layer was formed was shower-developed for 60 seconds using a 0.05% by mass potassium hydroxide aqueous solution as an alkaline developer, and further washed with ultrapure water for 60 seconds.
The glass substrate was arrange | positioned on the 0.7-mm upper surface of the glass substrate in which the obtained coloring pattern was formed, and it heated for 30 minutes on a 230 degreeC hotplate. The presence or absence of coloring of the glass substrate on the upper surface was confirmed visually to evaluate sublimation (color transfer).
○: No coloring, Δ: Light coloring, X: Dark coloring results are shown in Table 2.

[Summary of results]
Color material dispersions of Reference Examples 1 to 7 and Example 8 in which the color material (A-1) represented by the general formula (I) and the metal lake color material (A-2) of a rhodamine acid dye are combined. The colored layer obtained by using a high brightness value after post-baking, the color difference (ΔEab) before and after post-baking is 3 or less, excellent heat resistance, and the dye was not sublimated. Among them, Reference Examples 4 to 7 and Example 8 using a metal lake color material of a rhodamine acid dye using polyaluminum chloride represented by the general formula (II) as a lake agent are excellent in dispersibility. The contrast value after post-baking was high.
Among the xanthene acid dyes, Comparative Examples 1 to 3 using a coloring material obtained by rake formation of a fluorescein dye with polyaluminum chloride had a large ΔEab and extremely poor heat resistance. Moreover, color transfer was recognized and the coloring material was sublimed.
In Comparative Example 5 using a color material raked with a triphenylmethane acid dye, the luminance value before post-baking was high, but the luminance value significantly decreased after post-baking and the color difference was also large. In Comparative Example 6 using a color material raked with an azo acid dye, the luminance value was low before post-baking, the luminance value was low even after post-baking, and the color difference was large. Further, in Comparative Example 7 using the color material raked with the indigo dye, the combination with the color material (A-1) hardly changes the color even when the content ratio is changed, and the luminance value. Only declined.
From the results of Comparative Examples 4 and 9, it was revealed that even a rhodamine dye sublimates in the case of a basic dye.

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 (10)

(A) a color material, (B) a dispersant, and (C) a solvent, wherein the color material (A-1) is represented by the following general formula (I): A color material dispersion for a color filter, comprising a rhodamine acid dye metal lake color material (A-2), wherein the rhodamine acid dye is a rhodamine acid dye represented by the following general formula (III).

(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. aliphatic hydrocarbon radical having a hydrogen group, or an aromatic group having the aliphatic hydrocarbon group, O in the carbon chain, S, may be contained N is .B ^c-'s c-valent poly R ^{i to} R ^v each independently represents a hydrogen atom, an optionally substituted alkyl group or an optionally substituted aryl group, R ⁱⁱ and R ⁱⁱⁱ , R good .Ar ¹ be ^iv and ^{R v} are bonded to form a ring structure represents a divalent aromatic group which may have a substituent. plural ^R i to R ^v and Ar ¹ each They may be the same or different.
a and c represent an integer of 2 or more, and b and d represent an integer 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. )

(In General Formula (III), R ¹ , R ² , R ³ and R ⁴ are each independently a hydrogen atom or a linear or branched chain having 1 to 20 carbon atoms which may have a substituent. The substituent which the alkyl group may have is a halogen atom or an aryl group, and the aryl group further has a halogen atom, an acidic group or a salt thereof as a substituent. May be.
R ⁵ represents an acidic group or a salt thereof, and x is an integer of 0 to 5. However, general formula (III) has at least two acidic groups or salts thereof, one of which forms an inner salt. )   The color material dispersion for a color filter according to claim 1, wherein the color material (A-2) is an aluminum lake color material of a rhodamine acid dye.   The color for a color filter according to claim 1 or 2, wherein the polyacid anion in the color material (A-1) contains at least tungsten, and a molar ratio of molybdenum to tungsten is 0: 100 to 15:85. Material dispersion.   A colored resin composition for a color filter, comprising the color material dispersion according to any one of claims 1 to 3 and (D) a binder component. A metal lake colorant of a rhodamine acid dye, wherein the rhodamine acid dye is a rhodamine acid dye represented by the following general formula (III), and a rake agent is represented by the following general formula (II) A color material that is polyaluminum chloride.

(In General Formula (III), R ¹ , R ² , R ³ and R ⁴ are each independently a hydrogen atom or a linear or branched chain having 1 to 20 carbon atoms which may have a substituent. The substituent which the alkyl group may have is a halogen atom or an aryl group, and the aryl group further has a halogen atom, an acidic group or a salt thereof as a substituent. May be.
R ⁵ represents an acidic group or a salt thereof, and x is an integer of 0 to 5. However, general formula (III) has at least two acidic groups or salts thereof, one of which forms an inner salt. )

(In general formula (II), n is an integer of 2 to 20, and m is an integer of (n / 2) to (3n-1).) The coloring material according to claim 5, wherein the rake agent is polyaluminum chloride represented by the following general formula (II ').

(In General Formula (II ′), n is an integer of 2 to 10, and m is an integer of 2n to (3n−1).)   A color material dispersion for a color filter, comprising the color material according to claim 5, (B) a dispersant, and (C) a solvent. A color filter comprising at least a transparent substrate and a colored layer provided on the transparent substrate, wherein at least one of the colored layers is a color material (A-1) represented by the following general formula (I): And a rhodamine acid dye metal lake color material (A-2), wherein the rhodamine acid dye is a rhodamine acid dye represented by the following general formula (III).

(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. aliphatic hydrocarbon radical having a hydrogen group, or an aromatic group having the aliphatic hydrocarbon group, O in the carbon chain, S, may be contained N is .B ^c-'s c-valent poly R ^{i to} R ^v each independently represents a hydrogen atom, an optionally substituted alkyl group or an optionally substituted aryl group, R ⁱⁱ and R ⁱⁱⁱ , R good .Ar ¹ be ^iv and ^{R v} are bonded to form a ring structure represents a divalent aromatic group which may have a substituent. plural ^R i to R ^v and Ar ¹ each They may be the same or different.
a and c represent an integer of 2 or more, and b and d represent an integer 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. )

(In General Formula (III), R ¹ , R ² , R ³ and R ⁴ are each independently a hydrogen atom or a linear or branched chain having 1 to 20 carbon atoms which may have a substituent. The substituent which the alkyl group may have is a halogen atom or an aryl group, and the aryl group further has a halogen atom, an acidic group or a salt thereof as a substituent. May be.
R ⁵ represents an acidic group or a salt thereof, and x is an integer of 0 to 5. However, general formula (III) has at least two acidic groups or salts thereof, one of which forms an inner salt. )   9. A liquid crystal display device comprising: the color filter according to claim 8; 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 8 and an organic light emitter.

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