ADHESIVE COMPOSITION FOR POLARIZING PLATE AND OPTICAL MEMBER COMPRISING THE SAME

摘要

PURPOSE: An adhesive composition for polarizing plates with excellent transparency and reworkability is provided to present a great adhesion layer with excellent adhesion by increasing compatibility with a (meta) acrylic copolymer (acting as an adhesive). CONSTITUTION: An adhesive composition for polarizing plates comprises a (meta) acrylic copolymer, an acrylic-modified petroleum resin tackifier indicated as the following formula 1: R'-CO-O-R and a cross-linking agent. The R' is the petroleum resin. The R is a C1~20 alkyl group or a C6~50 aryl group. The optical member comprises a adhesion layer including the acrylic denaturation petroleum resin tackifier with dilatometric softening temperature of 50-150°C. The optical member has a characteristic of 1or less% of brightness difference according to the following equation 1:ΔL =[(a + b + d + e)/4]- c. The a, the b, the d and the e are brightness measured at the brightness measuring point of the central location of the panel angular side. The c is brightness of the panel central part.