Alkali-soluble resin, photosensitive resin composition for color filter containing the same and uses thereof

Patent metadata

Field	Value
Publication number	US-10088612-B2
Application number	US-201514944123-A
Country	US
Kind code	B2
Filing date	Nov 17, 2015
Priority date	Nov 18, 2014
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

The present invention relates to an alkali-soluble resin (A) and a photosensitive resin composition for a color filter and uses thereof. The photosensitive resin composition includes the alkali-soluble resin (A), a compound (B) containing an ethylenically unsaturated group, a photoinitiator (C) and an organic solvent (D). The photosensitive resin composition according to the present invention can improve the change rate of film thickness in thermal solvent and linearity of pattern with high finesse of the color filter.

First claim

What is claimed is:

1. An alkali-soluble resin (A) comprising a first alkali-soluble resin (A-1) obtained by reacting a first mixture, wherein the first mixture comprises an epoxy compound (a-1-1) having at least two epoxy groups and represented by Formula (1) and a compound (a-1-2) having at least one carboxylic acid group and at least one ethylenically unsaturated group;

in Formula (1):
R 1 , R 2 and R 3 independently represent a branched or linear C 1 -C 6 alkylene group or a branched or linear C 1 -C 6 oxyalkylene group;
E 1 , E 2 and E 3 independently represent an epoxy-containing group represented by Formula (2), an organic group represented by Formula (3) or a hydrogen atom, wherein at least two of E 1 , E 2 and E 3 represent the epoxy-containing group represented by Formula (2); and

in Formulae (2) and (3), R 4 represents a hydrogen atom or a methyl group.

2. The alkali-soluble resin (A) according to claim 1 , wherein R 1 , R 2 and R 3 represent a C 1 -C 3 alkylene group.

3. A photosensitive resin composition for a color filter comprising:
an alkali-soluble resin (A);
a compound (B) containing an ethylenically unsaturated group;
a photoinitiator (C); and
an organic solvent (D);
wherein:
the alkali-soluble resin (A) comprising a first alkali-soluble resin to (A-1) obtained by reacting a first mixture, wherein the first mixture comprises an epoxy compound (a-1-1) having at least two epoxy groups and represented by Formula (1) and a compound (a-1-2) having at least one carboxylic acid group and at least one ethylenically unsaturated group;

in Formula (1):
R 1 , R 2 and R 3 independently represent a branched or linear C 1 -C 6 alkylene group or a branched or linear C 1 -C 6 oxyalkylene group;
E 1 , E 2 and E 3 independently represent an epoxy-containing group represented by Formula (2), an organic group represented by Formula (3) or a hydrogen atom, wherein at least two of E 1 , E 2 and E 3 represent the epoxy-containing group represented by Formula (2); and

in Formulae (2) and (3), R 4 represents a hydrogen atom or a methyl group.

4. The photosensitive resin composition for the color filter according to claim 3 , wherein R 1 , R 2 and R 3 represent a C 1 -C 3 alkylene group.

5. The photosensitive resin composition for the color filter according to claim 3 , wherein the alkali-soluble resin (A) comprises a second alkali-soluble resin (A-2) obtained by reacting a second mixture, and the second mixture comprises an epoxy compound (a-2-1) having at least two epoxy groups and represented by Formula (4) or (5) and a compound (a-2-2) having at least one carboxylic acid group and at least one ethylenically unsaturated group;

in Formula (4), R 61 , R 62 , R 63 and R 64 are the same or different, and independently represent a hydrogen atom, a halogen atom, a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a C 6 -C 12 aryl group or a C 6 -C 12 aralkyl group;

in Formula (5), R 65 to R 78 are the same or different, and independently represent a hydrogen atom, a halogen atom, a C 1 -C 8 alkyl group, or a C 6 -C 15 aromatic group; and
n represents an integer from 0 to 10.

6. The photosensitive resin composition for the color filter according to claim 3 , wherein the alkali-soluble resin (A) comprises a third alkali-soluble resin (A-3) obtained by reacting a third mixture, and the third mixture comprises an ethylenically unsaturated monomer having at least one carboxylic acid groups and an other copolymerizable ethylenically unsaturated monomer.

7. The photosensitive resin composition for the color filter according to claim 3 , wherein based on 100 parts by weight of the used amount of the alkali-soluble resin (A), the used amount of the first alkali-soluble resin (A-1) is from 10 parts by weight to 100 parts by weight.

8. The photosensitive resin composition for the color filter according to claim 3 , wherein based on 100 parts by weight of the used amount of the alkali-soluble resin (A), the used amount of the compound (B) containing the ethylenically unsaturated group is from 40 parts by weight to 400 parts by weight; the used amount of the photoinitiator (C) is from 10 parts by weight to 100 parts by weight; and the used amount of the organic solvent (D) is from 500 parts by weight to 5000 parts by weight.

9. The photosensitive resin composition for the color filter according to claim 3 , which further comprises a pigment (E).

10. The photosensitive resin composition for the color filter according to claim 9 , wherein based on 100 parts by weight of the used amount of the alkali-soluble resin (A), the used amount of the pigment (E) is from 20 parts by weight to 200 parts by weight.

11. A method for manufacturing a color filter comprising forming a protective film with the photosensitive resin composition for the color filter according to claim 3 .

12. A method for manufacturing a color filter comprising forming a pixel layer with the photosensitive resin composition for the color filter according to claim 3 .

13. A color filter manufactured by the method according to claim 11 .

14. A color filter manufactured by the method according to claim 12 .

15. A liquid crystal display device comprising the color filter according to claim 13 .

16. A liquid crystal display device comprising the color filter according to claim 14 .

Assignees

• Chi Mei Corp

Inventors

• Hsu Cheng-Chang
• Hsieh Bar-Yuan

Classifications

• C08G59/26

  heterocyclic · CPC title

• C08G59/32

  Epoxy compounds containing three or more epoxy groups · CPC title

• G02B5/223 Primary

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

• G02B1/14

  Protective coatings, e.g. hard coatings · CPC title

• C08G59/3245

  containing only nitrogen as a heteroatom · CPC title