Patent ID: 9720282
Date: 2017-08-01
CPC Classifications: C08G,C09D,C09K,G02F

Claim:
1. A liquid crystal display device, comprising: a first substrate; a first alignment layer on the first substrate; a second substrate facing the first substrate; a second alignment layer on the second substrate; and a liquid crystal layer disposed between the first substrate and the second substrate, and comprising liquid crystal molecules, wherein the first alignment layer and the second alignment layer comprise a polymer comprising at least one of polyamic acid, polyimide, and a combination comprising at least one of the foregoing polymers, and an epoxy cross-linker represented by Chemical Formula 1: wherein, x is 6, R is an unsubstituted C wherein an amount of the epoxy cross-linker is about 4.5 to about 9 parts by weight, based on 100 parts by weight of the polymer, wherein the polymer comprises a polymerization product of a tetracarboxylic acid dianhydride and a diamine compound, wherein the diamine compound comprises about 5 to about 23 parts by weight, based on 100 parts by weight of the polymer, of a branched diamine compound comprising a C wherein, X is a bivalent organic group selected from —O—, —COO—, —OCO—, —NHCO—, —CONH— and —CO—, and R wherein a contact angle of liquid crystals at a surface of the first alignment layer and a surface of the second alignment layer comprising the polymer is 16.5 to 18 degrees.