Patent ID: 8236416

Claim:
An adhesive sheet comprising a substrate layer; an antistatic layer formed on one surface of the substrate layer and an adhesive layer formed on the other surface of the substrate layer, wherein the anti-static layer consists essentially of an organic binder, an antistatic agent, an antifriction agent and a curing agent; the amounts of the antistatic agent, the antifriction agent and the curing agent are 0.01 to 30 parts by mass, 5 to 20 parts by mass and 1 to 20 parts by mass, respectively, based on 100 parts by mass of the organic binder; the organic binder is a (meta)acryclic acid ester polymer; the antistatic agent is a quaternary ammonium salt of dimethylaminoethyl(meta)acrylate, a quaternary ammonium salt of diethylaminoethyl(meta)acrylate, a quaternary ammonium salt of methylethylaminoethyl(meta)acrylate, a quaternary ammonium salt of p-dimethylaminosteyrene or a quaternary ammonium salt of p-diethylaminostyrene; the antifriction agent is a silicone graft copolymer; the curing agent is an epoxy compound; and the ratio of silicone graft compound monomer unit in the silicone graft copolymer is from 15 to 60 parts by mass.