THERMOPLASTIC ELASTOMER COMPOSITION

摘要

A novel thermoplastic elastomer composition which comprises an isobutylene block copolymer (A) comprising a polymer block consisting mainly of isobutylene units and a polymer block consisting mainly of aromatic vinyl compound units and an isobutylene polymer (B) having an alkenyl group at an end. It is rich in flexibility and is excellent in moldability, rubbery properties, mechanical strength, compression set characteristics, and vibration-damping properties.