Patent ID: 9638952
Date: 2017-05-02
CPC Classifications: C08L,C09J,C09K,G02F

Claim:
1. A polarizing plate comprising a polarizing element; and a pressure sensitive adhesive layer for attaching the polarizing plate to a liquid crystal panel, being formed on one or both sides of said polarizing element, and including a pressure sensitive adhesive composition in a cured state, wherein the pressure sensitive adhesive composition has a viscosity of 3,000 cP to 10,000 cP at room temperature and a solid content of at least 20% by weight to 40% by weight, and comprises a crosslinkable acrylic polymer having a weight average molecular weight of more than 500,000 and 700,000 or less, a non-crosslinkable acrylic polymer having a weight average molecular weight of more than 500,000 and 700,000 or less, a multifunctional acrylate and a multifunctional crosslinker, wherein an interpenetrating polymer network structure comprising a cross-linked structure formed by the crosslinkable acrylic polymer cross-linked with the multifunctional crosslinker, and a cross-linked structure formed by the polymerized multifunctional acrylate, is embodied in a cured state, the multifunctional crosslinker being different from the multifunctional acrylate, wherein the multifunctional acrylate is included in an amount of more than 5 parts by weight and less than 15 parts by weight, relative to 100 parts by weight of the crosslinkable acrylic polymer, wherein a gel content as represented by General Formula 2 is at least 80% by weight: wherein A represents a mass of said pressure sensitive adhesive and B represents a dry mass of insoluble fractions in said pressure sensitive adhesive after depositing it in ethyl acetate at room temperature for 48 hours, and wherein a ratio of the non-crosslinkable acrylic polymer to the crosslinkable acrylic polymer, by weight, is 0.1 to 0.5.