Adhesive resin and adhesive composition for optical member including same

Patent metadata

Field	Value
Publication number	US-11845884-B2
Application number	US-201917046554-A
Country	US
Kind code	B2
Filing date	Oct 29, 2019
Priority date	Dec 7, 2018
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

An adhesive resin and an adhesive composition for an optical member including the same is provided. The adhesive resin includes an acrylic copolymer formed by polymerizing a monomer mixture including a monomer represented by [Formula 1], a (meth)acrylic monomer having a cross-linkable functional group, and an alkyl (meth)acrylate-based monomer.

First claim

The invention claimed is:

1. An adhesive resin comprising:
an acrylic copolymer formed by polymerizing a monomer mixture including a monomer represented by [Formula 1],
a (meth)acrylic monomer having a cross-linkable functional group, and
an alkyl (meth)acrylate-based monomer:

wherein,
F 1 is —OH, —COOH, or —SH,
X 1 is a single bond, —O—, —NH—, an alkylene group having 1 to 10 carbon atoms, or a combination thereof,
X 2 is a single bond, an alkylene group having 1 to 10 carbon atoms, —COO—, or a combination thereof,
R 1 is hydrogen or an alkyl group having 1 to 4 carbon atoms,
R 2 is a single bond or an alkylene group having 1 to 10 carbon atoms,
R 3 is an arene having 6 to 20 carbon atoms or an alkane having 1 to 10 carbon atoms,
wherein the monomer mixture comprises the monomer represented by [Formula 1] in an amount of 0.01 part by weight to 0.4 part by weight based on 100 parts by weight of the monomer mixture.

2. The adhesive resin of claim 1 , wherein the acrylic copolymer has a weight average molecular weight of 500,000 g/mol to 1,500,000 g/mol.

3. The adhesive resin of claim 1 , wherein the acrylic copolymer has a branched polymer structure.

4. The adhesive resin of claim 1 , wherein the monomer represented by Formula 1 is one or more selected from the group consisting of compounds represented by Formulas 1-1 to 1-4 below:

5. The adhesive resin of claim 1 , wherein the monomer mixture comprises:
84 parts by weight to 99.89 parts by weight of the alkyl (meth)acrylate-based monomer, based on 100 parts by weight of the monomer mixture; and
0.1 to 15 parts by weight of the (meth)acrylic monomer having a cross-linkable functional group, based on 100 parts by weight of the monomer mixture.

6. An adhesive composition for an optical member, comprising the adhesive resin of claim 1 and a multi-functional curing agent.

7. The adhesive composition of claim 6 , wherein the multi-functional curing agent comprises an isocyanate-based compound, an epoxy-based compound, an aziridine-based compound, or a metal chelate-based compound.

8. The adhesive composition of claim 6 , wherein the multi-functional curing agent is included in an amount of 0.01 to 1 part by weight based on 100 parts by weight of the adhesive resin.

9. A polarizing plate comprising an adhesive layer including a cured product of the adhesive composition of claim 7 .

10. A display device comprising the polarizing plate of claim 9 .

Assignees

• Lg Chemical Ltd

Inventors

• Kim Yoon Jung
• Lee Min Ki
• Kim Eun Suk
• Kim Kee Young

Classifications

• C09J133/10 Primary

  Homopolymers or copolymers of methacrylic acid esters · CPC title

• C09J11/06

  organic · CPC title

• C09J133/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title