PHOTOCURABLE PRESSURE-SENSITIVE ADHESIVE COMPOSITION, PHOTOCURABLE PRESSURE-SENSITIVE ADHESIVE LAYER, AND PHOTOCURABLE PRESSURE-SENSITIVE ADHESIVE SHEET

摘要

Provided is a photocurable pressure-sensitive adhesive composition which does not cause oozing under ordinary temperature and pressure conditions and exhibits sufficient initial tack via drying and crosslinking. The photocurable pressure-sensitive adhesive composition is easily curable by light irradiation and can form a curable pressure-sensitive adhesive layer having high peel resistance. Also provided are a photocurable pressure-sensitive adhesive layer and a photocurable pressure-sensitive adhesive sheet. A photocurable pressure-sensitive adhesive composition is prepared which comprises a graft polymer obtained by grafting a chain that contains a monomer bearing a cyclic ether group onto a (meth)acrylic polymer that contains 0.2 to 10% by weight of hydroxyalkyl(meth)acrylamide monomer units, and a cationic photopolymerization initiator. A photocurable pressure-sensitive adhesive layer using such composition and a photocurable pressure-sensitive adhesive sheet are also prepared.