Pressure sensitive adhesive.

摘要

A pressure sensitive adhesive comprising (I) at least one elastomer, (II) at least one tackifier and (III) an ethylene-propylene copolymer having such a low molecular weight that the intrinsic viscosity is not more than 0.5 which is obtainable by oxidative degradation of a corresponding ethylene-propylene copolymer containing 30-60 weight % of propylene, wherein the weight ratio of (III) to (I) ranges from 5/l00 to 40/l00. The pressure sensitive adhesive of this invention is not only tacky enough but also highly adhesive and retentive, so it is suitably used for pressure sensitive adhesive tape.