Green pigment composition for color filters, and color filter

Patent metadata

Field	Value
Publication number	US-9904166-B2
Application number	US-201615512952-A
Country	US
Kind code	B2
Filing date	Feb 16, 2016
Priority date	Apr 21, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

Provided is a green pigment composition which includes a halogenated zinc phthalocyanine pigment and a brominated chlorinated zinc phthalocyanine derivative having a phthalimide skeleton bonded by an alkylene group, and which enables a great enhancement in contrast without decreasing luminance and coloring power, and a color filter including the green pigment composition. The green pigment composition for color filters includes from 0.1 to 10 parts of a halogenated zinc phthalocyanine pigment derivative substituted with a functional group having a phthalimide skeleton bonded by an alkylene group per 100 parts of a halogenated zinc phthalocyanine pigment, in terms of a mass, and a color filter includes the green pigment composition for color filters.

First claim

The invention claimed is:

1. A green pigment composition for color filters comprising:
from 0.1 to 10 parts of a pigment derivative represented by General Formula (1) per 100 parts of a halogenated zinc phthalocyanine pigment, in terms of a mass:

wherein Z 1 to Z 16 each independently represent a bromine atom, a chlorine atom, a hydrogen atom, or a functional group having a phthalimide skeleton bonded by an alkylene group having 1 to 3 carbon atoms, an average number of bromine atoms in one molecule is 8 to 12, an average number of chlorine atoms is 2 to 5, an average number of substituents of the functional group having a phthalimide skeleton bonded by an alkylene group having 1 to 3 carbon atoms is from 0.1 to 3, and the remainder is hydrogen atoms.

2. The green pigment composition for color filters according to claim 1 ,
wherein the halogenated zinc phthalocyanine pigment has 10 to 14 halogen atoms on average in one molecule, and among these, the number of bromine atoms is from 8 to 12 on average, and the number of chlorine atoms is from 2 to 5 on average.

3. The green pigment composition for color filters according to claim 1 , further comprising:
a yellow pigment.

4. A color filter comprising:
the pigment composition for color filters according to claim 1 .

5. A method for manufacturing the pigment composition for color filters according to claim 1 , which comprises solvent salt milling.

Assignees

• Dainippon Ink & Chemicals

Inventors

• Sakamoto Keisuke
• Kimura Akira
• Shimada Katsunori

Classifications

• G03F7/0007 Primary

  Filters, e.g. additive colour filters; Components for display devices · CPC title

• C09B47/16

  having alkyl radicals substituted by nitrogen atoms · CPC title

• G02B5/223

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

• G03F7/004

  Photosensitive materials (G03F7/12, G03F7/14 take precedence) · CPC title

• G03F7/027

  Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds (G03F7/075 takes precedence) · CPC title