Modified acrylate adhesive resin and production process of the same, photosensitive resin composition, display substrate, liquid crystal panel

Patent metadata

Field	Value
Publication number	US-9644122-B2
Application number	US-201414499425-A
Country	US
Kind code	B2
Filing date	Sep 29, 2014
Priority date	Jun 24, 2014
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

The invention discloses a modified acrylate adhesive resin and a production process of the same, a photosensitive resin composition, a display substrate, and a liquid crystal panel. This resin can improve the compression displacement and elastic recovery rate of the column-like spacers between two substrates of the liquid crystal display. The modified acrylate adhesive resin disclosed by the invention is an acrylate adhesive resin modified by a terminal hydroxyl-containing polybutadiene polymer, and has the following general structural formula:

in which formula Z is:

wherein y 1 +y 2 +y 3 =1; and n is an integer of 3-30; in which formula R 1 is a hydrogen atom or an alkyl group; R 2 is an alkyl group or an aralkyl group; R 3 is an aromatic carbon ring; x 1 is an integer of 1-300; x 2 is an integer of 1-300; x 3 is an integer of 1-300; and x 4 is an integer of 2-30. The resin of the invention can be used for producing spacers.

First claim

What is claimed is:

1. A modified acrylate adhesive resin, being an acrylate adhesive resin modified by a terminal hydroxyl-containing polybutadiene polymer, and having the following general structural formula:

in which formula Z is:

wherein y 1 +y 2 +y 3 =1; and n is an integer of 3-30;

in which formula R 1 is a hydrogen atom or an alkyl group; R 2 is an alkyl group or an aralkyl group; and R 3 is an aromatic carbon ring; and
x 1 is an integer of 1-300; x 2 is an integer of 1-300; x 3 is an integer of 1-300; and x 4 is an integer of 2-30;
the molar ratio of the terminal hydroxyl-containing polybutadiene polymer to the acrylate adhesive resin is 1:1-10, and the terminal hydroxyl-containing polybutadiene polymer has a weight-average molecular weight of 1000-5000 and a hydroxyl value of 0.5-2mmol/g, and
the weight-average molecular weight of the acrylate adhesive resin modified by a terminal hydroxyl-containing polybutadiene polymer is 8000-20000.

2. A photosensitive resin composition, wherein the photosensitive resin composition comprises: the acrylate adhesive resin modified by a terminal hydroxyl-containing polybutadiene polymer according to claim 1 , an ethylenically unsaturated bond-containing monomer, a photopolymerization initiator, an organic solvent, and an additive.

3. The photosensitive resin composition according to claim 2 , wherein
the weight percent of the acrylate adhesive resin modified by a terminal hydroxyl-containing polybutadiene polymer is 5%-30%,
the weight percent of the ethylenically unsaturated bond-containing monomer is 5%-30%,
the weight percent of the photopolymerization initiator is 0.1%-10%,
the weight percent of the organic solvent is 20%-88%, and
the weight percent of the additive is 0.01%-10%.

4. A display substrate, comprising an underlaying substrate and spacers located on the underlaying substrate, wherein the spacers are made of the photosensitive resin composition according to claim 2 .

5. A liquid crystal panel, comprising the display substrate according to claim 4 .

6. A production process of the modified acrylate adhesive resin according to claim 1 , comprising:
mixing an acrylate adhesive resin, a terminal hydroxyl-containing polybutadiene polymer, a catalyst and a solvent to yield a mixture, heating the mixture to a temperature of 100-130° C. and keeping the temperature for 1-10 h, removing the solvent by evaporation, to produce the acrylate adhesive resin modified by a terminal hydroxyl-containing polybutadiene polymer.

7. The production process of the modified acrylate adhesive resin according to claim 6 , wherein the molar ratio of the terminal hydroxyl-containing polybutadiene polymer to the acrylate adhesive resin is 1:1-10.

8. The production process of the modified acrylate adhesive resin according to claim 6 , wherein the terminal hydroxyl-containing polybutadiene polymer has a weight-average molecular weight of 1000-5000 and a hydroxyl value of 0.5-2 mmol/g.

Assignees

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

Inventors

• Yang Tonghua
• Li Min
• Zhang Sikai
• Feng He
• Dong Ming

Classifications

• C08G81/022

  containing sequences of polymers of conjugated dienes and of polymers of alkenyl aromatic compounds · CPC title

• G02F1/1339

  Gaskets; Spacers; Sealing of cells · CPC title

• Y10T428/24752

  Laterally noncoextensive components · CPC title

• C08F283/00

  Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G · CPC title

• B32B2457/202

  LCD, i.e. liquid crystal displays · CPC title