PEELING METHOD FROM SUBSTRATE BY PHOTO-CURING AND EXPANSION AND PSA COMPOSITION

摘要

The present invention relates to a photo-crosslinkage adhesive composition including a foaming agent. The photo-crosslinkage adhesive composition includes: a foaming agent (A); an addition polymerization type copolymer (B) in which a photo-crosslinkage monomer having alkyl glycidyl ether and an unsaturated double bond is addition polymerized with a side chain of a (meta)acrylic copolymer or a siloxane-based addition polymerization type copolymer (C) in which a siloxane prepolymer instead of the alkyl glycidyl ether is addition polymerized. The photo-crosslinkage adhesive composition according to the present invention improves wettability, maintains re-peelability, reduces aging, improves photopolymerization effects, and facilitates the deformation of a topmost transparent film that is in direct contact with an ultraviolet irradiated surface.