US 9,315,697 B2 · Multi-block copolymer

Abstract

Provided are a multi-block copolymer, a pressure-sensitive adhesive composition, a method of preparing a multi-block copolymer, a pressure-sensitive adhesive polarizing plate, and a liquid crystal display device. The pressure-sensitive adhesive composition including the multi-block copolymer may have excellent durability regardless of a temperature and/or humidity. In addition, the method of preparing a multi-block copolymer may prepare a multi-block copolymer increased in molecular weight which is structurally controlled with a simple process using a compound containing at least two halogen atoms. Accordingly, when included in a pressure-sensitive adhesive resin, the multi-block copolymer may have excellent cohesive strength in the resin, and a network structure during curing, and thus, when applied to a pressure-sensitive adhesive composition, the multi-block copolymer may be usefully applied to an optical member due to excellent durability regardless of a temperature and humidity.

Claims20

Dependent claims

A multi-block copolymer, comprising:

a first block having a glass transition temperature of −10° C. or less;
a second block having a glass transition temperature of 50° C. or more;
and
a third block having a glass transition temperature of −10° C. or less,
wherein the multi-block copolymer is a tri-block copolymer in which the first and third blocks are coupled at both ends of the second block,
wherein a crosslinkable functional group is present in the first or third block, and
wherein the first or third block comprises a polymerized unit of 90 to 99.9 parts by weight of an acrylic acid ester monomer and 0.1 to 10 parts by weight of a copolymerizable monomer having the crosslinkable functional group.

4 more elements

Dependencies are inferred from the claim text.

Multi-block copolymer

Life of this patent

Multi-block copolymer

Life of this patent

Abstract

Claims20