Patent ID: 6140418
Filing Date: 2000-10-31
Classification: C08L,C09K

Abstract:
A thermoplastic polymer composition formed by a melt mixing method comprising,(A) a block copolymer comprised of a polymer block composed mainly of an aromatic vinyl compound and a polymer block composed mainly of isobutylene; and(B) a crosslinked rubber of at least one rubber selected from the group consisting of a natural rubber, a diene polymer rubber, an olefin polymer rubber, an acrylic rubber and a fluorine rubber;at a weight ratio of (A) to (B) of 90:10 to 10:90;wherein the crosslinked rubber (B) has been obtained by dynamic crosslinking, in the presence of a crosslinking agent, at the time when the block copolymer (A) is melt mixed with the rubber in component (B).