PRESSURE-SENSITIVE ADHESIVE COMPOSITION

摘要

The present invention has an object to provide a pressure-sensitive adhesive composition that provides a polyester-based pressure-sensitive adhesive capable of realizing both of heat resistance and adhesive force at high levels and a pressure-sensitive adhesive sheet having a polyester-based pressure-sensitive adhesive. The pressure-sensitive adhesive composition provided by the present invention contains a polyester resin A with Mw of 4×10 4 to 12×10 4 and a polyester resin B with Mw of 0.3×10 4 to 1×10 4 . The ratio (m A :m B ) of the number of moles m A and m B of the polyester resins A and B is 1:0.35 to 1:1.4. The pressure-sensitive adhesive composition further contains a crosslinking agent, and has a gel fraction after crosslinking of 30 to 65%.