Patent ID: 9389455
Filing Date: 2016-07-12
CPC Classification: C08L,C09J,C09K,G02F

Claim Text:
1. A pressure sensitive adhesive composition comprising: a crosslinkable acrylic polymer having a weight average molecular weight of more than 500,000 and 700,000 or less; a multifunctional crosslinker; a non-crosslinkable acrylic polymer having a weight average molecular weight of more than 500,000 and 700,000 or less; and a multifunctional acrylate which 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 an interpenetrating polymer network structure comprising a cross-linked structure by an acrylic polymer cross-linked with a multifunctional crosslinker, and a cross-linked structure by a polymerized multifunctional acrylate, is embodied in a cured state, the multifunctional crosslinker being different from the multifunctional acrylate, wherein a ratio of the non-crosslinkable acrylic polymer to the crosslinkable acrylic polymer by weight is 0.01 to 0.4, and wherein the gel content of the pressure sensitive adhesive composition as represented by General Formula 2 is 80% to 99% 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.