Patent ID: 9708424
Date: 2017-07-18
CPC Classifications: C08F

Claim:
1. An active energy ray-curable composition comprising: a (meth)acryloyl-terminated polyisobutylene polymer (A) and an active energy ray polymerization initiator (B), wherein the (meth)acryloyl-terminated polyisobutylene polymer (A) is represented by the following general formula (1): where R 1 represents a monovalent or polyvalent aromatic hydrocarbon group, or a monovalent or a polyvalent aliphatic hydrocarbon group; A represents a polyisobutylene polymer; R 2 represents a divalent saturated hydrocarbon group having 2 to 6 carbon atoms and containing no hetero atoms; R 3 and R 4 each independently represent hydrogen, a monovalent hydrocarbon group having 1 to 20 carbon atoms, or an alkoxy group having 1 to 20 carbon atoms; R 5 represents hydrogen or a methyl group; and n denotes a natural number.