ULTRAVIOLET CROSS-LINKING TYPE PRESSURE-SENSITIVE ADHESIVE COMPOSITION, PRESSURE-SENSITIVE ADHESIVE SHEET AND METHOD FOR PRODUCING THEM

摘要

PROBLEM TO BE SOLVED: To provide an ultraviolet cross-linking type pressure-sensitive adhesive composition having good pressure-sensitive adhesive characteristics by using a block copolymer of a styrene-based polymer component and an acrylic polymer component.;SOLUTION: This ultraviolet cross-linking pressure-sensitive adhesive composition is obtained by mixing (a) a block copolymer with (b) a trichloromethyl group-containing triazine derivative and (c) at least one kind of photosensitizer selected from the group of an acetophenone-based compound, a phosphine oxide- based compound and an imidazole-based compound. The block copolymer (a) is prepared by carrying out living radical polymerization of a styrene-based monomer and an acrylic monomer in the suitable order of the monomers in the presence of a transition metal and its ligand by using a polymerization initiator and comprises at least two bound blocks of a styrene-based polymer block A and an acrylic polymer block B.;COPYRIGHT: (C)2003,JPO