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

Patent metadata

Field	Value
Publication number	US-10317592-B2
Application number	US-201415031647-A
Country	US
Kind code	B2
Filing date	Jul 16, 2014
Priority date	Oct 23, 2013
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

Disclosed is a color material dispersion liquid for color filter, which has excellent heat resistance and is able to form a high-luminance coating film. The color material dispersion liquid for color filters includes (A) a color material, (B) a dispersant and (C) a solvent. The color material (A) contains (A-1) a color material represented by the following general formula (I) and (A-2) a metal lake color material of a rhodamine-based acid dye:

First claim

The invention claimed is:

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

wherein “A” is an “a”-valent organic group in which a carbon atom directly bound to “N” has no π bond, and the organic group is an aliphatic hydrocarbon group having a saturated aliphatic hydrocarbon group at least at a terminal position directly bound to “N”, or an aromatic group having the aliphatic hydrocarbon group, and O, S, N can be contained in a carbon chain of the organic group; B c− is a “c”-valent polyoxometalate anion; each of R i to R v is independently a hydrogen atom, an alkyl group which can have a substituent group, or an aryl group which can have a substituent group; R ii and R iii can be bound to form a ring structure, and/or R iv and R v can be bound to form a ring structure; Ar 1 is a divalent aromatic group which can have a substituent group; a plurality of R i s can be the same or different; a plurality of R ii s can be the same or different; a plurality of R iii s can be the same or different; a plurality of R iv s can be the same or different; a plurality of R v s can be the same or different; a plurality of Ar 1 s can be the same or different;
“a” and “c” are each an integer of 2 or more, and “b” and “d” are each an integer of 1 or more; “e” is 0 or 1, and there is no bond when “e” is 0; and a plurality of “e”s can be the same or different;

wherein each of R 1 and R 3 is independently a hydrogen atom, an alkyl group, an aryl group or a heteroaryl group, each of R 2 and R 4 is independently an aryl group or a heteroaryl group; R 1 and R 2 can be bound to form a ring structure, and/or R 3 and R 4 can be bound to form ring structure; R 1 and a carbon atom at the 5-position of the xanthene ring, R 2 and a carbon atom at the 7-position of the xanthene ring, R 3 and a carbon atom at the 4-position of the xanthene ring, or R 4 and a carbon atom at the 2-position of the xanthene ring can be bound to form a ring structure; the hydrogen atom in the aryl or heteroaryl group can be substituted with 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 or a carboxylic acid ester group; R 5 is an acidic group or a salt thereof; “x” is an integer of 0 to 5; and the general formula (III) has at least two acidic groups or salts thereof, and one of the at least two acidic groups or salts thereof forms an intramolecular salt, and
a laking agent is a polyaluminum chloride represented by the following general formula (II):
Al n (OH) m Cl (3n-m)   General Formula (II):

wherein “n” is an integer of 2 to 20, and “m” is an integer of (n/2) to (3n−1).

2. The color material dispersion liquid for color filters according to claim 1 , wherein the color material (A-2) is an aluminum lake color material of a rhodamine-based acid dye.

3. The color material dispersion liquid for color filters according to claim 1 , wherein the polyoxometalate anion in the color material (A-1) contains at least tungsten, and a molar ratio of molybdenum to the tungsten is 0:100 to 15:85.

4. A color material wherein the color material is a metal lake color material of a rhodamine-based acid dye, the rhodamine-based acid dye is represented by the following general formula (III), and a laking agent is a polyaluminum chloride represented by the following general formula (II):
Al n (OH) m Cl (3n-m)   General Formula (II):

wherein “n” is an integer of 2 to 20, and “m” is an integer of (n/2) to (3n−1);

wherein each of R 1 and R 3 is independently a hydrogen atom, an alkyl group, an aryl group or a heteroaryl group, each of R 2 and R 4 is independently an aryl group or a heteroaryl group; R 1 and R 2 can be bound to form a ring structure, and/or R 3 and R 4 can be bound to form ring structure; R 1 and a carbon atom at the 5-position of the xanthene ring, R 2 and a carbon atom at the 7-position of the xanthene ring, R 3 and a carbon atom at the 4-position of the xanthene ring, or R 4 and a carbon atom at the 2-position of the xanthene ring can be bound to form a ring structure; the hydrogen atom in the aryl or heteroaryl group can be substituted with 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 or a carboxylic acid ester group; R 5 is an acidic group or a salt thereof; “x” is an integer of 0 to 5; and the general formula (III) has at least two acidic groups or salts thereof, and one of the at least two acidic groups or salts thereof forms an intramolecular salt.

5. The color material according to claim 4 , wherein the color material is a metal lake color material of a rhodamine-based acid dye, and a laking agent is a polyaluminum chloride represented by the following general formula (II′):
Al n (OH) m Cl (3n-m)   General Formula (II′):

wherein “n” is an integer of 2 to 10, and “m” is an integer of 2n to (3n−1).

6. A color filter comprising at least a transparent substrate and color layers disposed on the substrate, wherein at least one of the color layers contains (A-1) a color material represented by the following general formula (I) and (A-2) a metal lake color material of a rhodamine-based acid dye, and the rhodamine-based acid dye is represented by the following general formula (III):

wherein “A” is an “a”-valent organic group in which a carbon atom directly bound to “N” has no π bond, and the organic group is an aliphatic hydrocarbon group having a saturated aliphatic hydrocarbon group at least at a terminal position directly bound to “N”, or an aromatic group having the aliphatic hydrocarbon group, and O, S, N can be contained in a carbon chain of the organic group; B c− is a “c”-valent polyoxometalate anion; each of R i to R v is independently a hydrogen atom, an alkyl group which can have a substituent group, or an aryl group which can have a substituent group; R ii and R iii can be bound to form a ring structure, and/or R iv and R v can be bound to form a ring structure; Ar 1 is a divalent aromatic group which can have a substituent group; a plurality of R i s can be the same or different; a plurality of R ii s can be the same or different; a plurality of R iii s can be the same or different; a plurality of R iv s can be the same or different; a plurality of R v s can be the same or different; a plurality of Ar 1 s can be the same or different;
“a” and “c” are each an integer of 2 or more, and “b” and “d” are each an integer of 1 or more; “e” is 0 or 1, and there is no bond when “e” is 0; and a plurality of “e”s can be the same or different;

wherein each of R 1 and R 3 is independently a hydrogen atom, an alkyl group, an aryl group or a heteroaryl group, each of R 2 and R 4 is independently an aryl group or a heteroaryl group; R 1 and R 2 can be bound to form a ring structure,

Assignees

• Dainippon Printing Co Ltd

Inventors

• Ogura Michihiro
• Murata Tomoki
• Murakami Fumiyasu
• Okada Masato
• Segawa Hiroaki

Classifications

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title

• C09B35/20

  from two coupling compounds of different types · CPC title

• G02F1/133514

  Colour filters · CPC title

• C09B11/08

  Phthaleins; {Phenolphthaleins; Fluorescein} · CPC title

• C09B63/005

  Metal lakes of dyes (complex metal compounds of azo dyes C09B45/00, metal complexes of colourless compounds C09B57/10) · CPC title