Curable resin, blue photoresist, color filter, and methods of preparing the same, and color display device

Patent metadata

Field	Value
Publication number	US-9670321-B2
Application number	US-201314387807-A
Country	US
Kind code	B2
Filing date	Dec 30, 2013
Priority date	Jun 6, 2013
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A curable resin including 1 part by weight of dianhydride, 0.8 to 1.5 parts by weight of diamine, and 1.5 to 5 parts by weight of vinyl monomer is disclosed. A blue photoresist, a color filter, and methods of preparing the same, and a color display device are also disclosed.

First claim

The invention claimed is:

1. A curable resin comprising:
dianhydride: 1 part by weight;
diamine: 0.8 to 1.5 parts by weight; and
vinyl monomer: 1.5 to 5 parts by weight,

wherein
the dianhydride is selected from the group consisting of
pyromellitic dianhydride,
benzophenone tetracarboxylic dianhydride,
biphenyltetracarboxylic dianhydride,
4,4′-oxydiphthalic anhydride or
4,4′-(hexafluoroisopropylidene)diphthalic anhydride;

the diamine is selected from the group consisting of
3-aminobenzyl amine,
2,2′-difluoro-4,4′-(9-fluorenylidene)diphenylamine,
hexahydro-m-xylenediamine,
1,4-bis(aminomethyl)cyclohexane,
2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane,
2,7-diaminofluorene,
m-xylenediamine or
4,4′-methylenebis(2-ethyl-6-methylaniline); and

the vinyl monomer is selected from the group consisting of vinyl chloride, styrene, methyl methacrylate, maleimide, butadiene, methyl acrylate, epoxy acrylate or bisphenol A-type epoxy methyl acrylate,
wherein the curing temperature of the curable resin ranges from 20° C. to 100° C.

2. A blue photoresist comprising:
the curable resin of claim 1 , a colorant, a solvent, an initiator, and an additive;
wherein, the weights of the curable resin, the colorant, the solvent, the initiator and the additive are:

the curable resin: 2 to 30 parts by weight;
the colorant: 2 to 20 parts by weight;
the solvent: 30 to 90 parts by weight;
the initiator: 0.01 to 1 part by weight; and
the additive: 0.005 to 0.02 parts by weight,

wherein the colorant is one or more selected from the group consisting of blue pigment, violet pigment, and blue dye.

3. The blue photoresist of claim 2 , wherein the solvent has a boiling point of from 30° C. to 90° C. at an atm, and the solvent is one or more selected from the group consisting of ether, pentane, dichloromethane, carbon disulfide, acetone, 1,1-dichloroethane, chloroform, methanol, tetrahydrofuran, n-hexane, trifluoroacetic acid, 1,1,1-trichloroethane, carbon tetrachloride, ethyl acetate, ethanol, butanone, cyclohexane, isopropanol, 1,2-dichloroethane, ethylene glycol dimethyl ether, trichloroethylene, and triethylamine.

4. The blue photoresist of claim 3 , wherein the initiator is one or more selected from the group consisting of α-aminoketone-based photoinitiator, acylphosphine oxide photoinitiator, α-hydroxyketone-based photoinitiator, phenylglyoxylate-based photoinitiator, and O-acyl-oxime ester-based photoinitiator.

5. A color filter comprising:
a substrate;
a Black Matrix arranged on the substrate; and
a blue filter layer arranged on the substrate and located in regions separated by the Black Matrix,
wherein the blue filter layer is formed from the blue photoresist of claim 3 .

6. The blue photoresist of claim 2 , wherein the initiator is one or more selected from the group consisting of α-aminoketone-based photoinitiator, acylphosphine oxide photoinitiator, α-hydroxyketone-based photoinitiator, phenylglyoxylate-based photoinitiator, and O-acyl-oxime ester-based photoinitiator.

7. A color filter comprising:
a substrate;
a Black Matrix arranged on the substrate; and
a blue filter layer arranged on the substrate and located in regions separated by the Black Matrix,
wherein the blue filter layer is formed from the blue photoresist of claim 6 .

8. A color filter comprising:
a substrate;
a Black Matrix arranged on the substrate; and
a blue filter layer arranged on the substrate and located in regions separated by the Black Matrix,

wherein the blue filter layer is formed from the blue photoresist of claim 2 .

9. A color display device comprising the color filter of claim 8 .

10. A method of preparing the color filter of claim 8 , wherein it comprising:
Step Q1: applying a black photoresist onto a substrate to form a Black Matrix;
Step Q2: forming sequentially red, green, and blue color filter layers on the substrate and in regions separated by the Black Matrix; and
Step Q3: preparing a transparent conductive layer on the color filter layer to produce the color filter.

11. The method of preparing the color filter of claim 10 , wherein, the Step Q2 of forming the blue filter layer comprises a pre-caking operation and a curing operation, wherein the pre-caking operation is carried out at a temperature of from 20° C. to 50° C. for 30 seconds to 120 seconds; and the curing operation is carried out at a temperature of from 20° C. to 100° C. for 5 minutes to 30 minutes.

12. A method of preparing the blue photoresist of claim 2 , wherein it comprising:
Step N1: weighing the raw materials, i.e., the curable resin, the colorant, the solvent, the initiator, and the additive, and mixing them homogeneously;
Step N2: degassing the homogeneously mixed raw materials to give a mixture; and
Step N3: filtering the resultant mixture to produce the blue photoresist.

13. A method of preparing the curable resin of claim 1 , wherein it comprising:
Step S1: weighing dianhydride and diamine, dissolving them into a solvent, mixing them homogeneously, and pouring the mixture into a reaction vessel;
Step S2: weighing vinyl monomer, dissolving it into a solvent sufficiently, and pouring the mixture into the reaction vessel; and
Step S3: weighing monobasic anhydride, and azo initiator, dissolving them into a solvent sufficiently, adding the mixture dropwise into the reaction vessel, passing a protective gas, and carrying out a reaction at a temperature of from 50° C. to 300° C. for 0.5 hour to 5 hours to produce the curable resin.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Li Hongyan
• Yang Jiuxia

Classifications

• B29D11/00634

  Production of filters · CPC title

• C08G73/1067 Primary

  Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound · CPC title

• G02B5/201

  in the form of arrays · CPC title

• C08G73/1014

  in the form of (mono)anhydrid · CPC title

• C08G73/105

  with oxygen only in the diamino moiety · CPC title