AROMATIC VINYL-ISOBUTYLENE-BASED BLOCK COPOLYMER COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain a resin composition of an aromatic vinyl-isobutylene-based block copolymer having excellent moldability and heat resistance. SOLUTION: This block copolymer composition comprises an indene- isobutylene-based block copolymer composed of a polymer block consisting essentially of isobutylene and a polymer block consisting essentially of indene or anα-methylstyrene-isobutylene-based block copolymer composed of a polymer block consisting essentially of isobutylene and a polymer block consisting essentially ofα-methylstyrene (A) and a styrene-isobutylene-based block copolymer composed of a polymer block consisting essentially of isobutylene and a polymer block consisting essentially of styrene (B).