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-11169308-B2
Application number	US-201916373352-A
Country	US
Kind code	B2
Filing date	Apr 2, 2019
Priority date	Oct 23, 2013
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

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:(symbols in the general formula (I) are as described in the Description.).

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 contains
a metal lake color material of a rhodamine-based acid dye, the rhodamine-based acid dye being represented by the following general formula (III), and
a laking agent that 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 , R 2 , R 3 and R 4 is independently a hydrogen atom or a straight- or branched-chain alkyl group which has 1 to 20 carbon atoms and optionally has a substituent group,
the substituent group that the alkyl group optionally has is a halogen atom or an aryl group, and the aryl group further optionally has a halogen atom, an acidic group, or a salt thereof as a second substituent 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.

2. A color material dispersion liquid for color filters, according to claim 1 ,
wherein “n” of General Formula (II) is an integer of 2 to 10, and “m” is an integer of 2n to (3n−1).

Assignees

• Dainippon Printing Co Ltd

Inventors

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

Classifications

• C09B11/12

  without any OH group bound to an aryl nucleus · CPC title

• C09B11/08

  Phthaleins; {Phenolphthaleins; Fluorescein} · CPC title

• G02B5/223 Primary

  containing organic substances, e.g. dyes, inks or pigments · CPC title

• G02B1/04

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

• C09B11/28

  Pyronines {; Xanthon, thioxanthon, selenoxanthan, telluroxanthon dyes} · CPC title