PSA composition, PSA, and PSA sheet using the same

摘要

Provided is a pressure-sensitive adhesive having a high adhesive strength and a high cohesive strength, which is cured by active energy ray irradiation. The present invention relates to a pressure-sensitive adhesive composition comprising: an acrylic resin (A); an ethylenically unsaturated compound containing one ethylenically unsaturated group (B); an ethylenically unsaturated compound containing two or more ethylenically unsaturated groups (C); and a photoinitiator (D). The pressure-sensitive adhesive composition is characterized by comprising an ethylenically unsaturated compound containing an alicyclic structure (B1) and a hydroxyl group-containing ethylenically unsaturated compound (B2) as the ethylenically unsaturated compound containing one ethylenically unsaturated group (B).