The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 1997
Filed:
Mar. 31, 1995
Yoshiharu Hashiguchi, Yokkaichi, JP;
Minoru Hasegawa, Suzuka, JP;
Kunio Goshima, Yokkaichi, JP;
Yasuhiko Takemura, Yokkaichi, JP;
Yoshiyuki Higuchi, Yokkaichi, JP;
Motokazu Takeuchi, Yokkaichi, JP;
Japan Synthetic Rubber Co., Ltd., Tokyo, JP;
Abstract
A hydrogenated block copolymer or hydrogenated block copolymer mixture consisting essentially of (a) hydrogenation product of a star-branched block copolymer represented by the structural formula (A-B).sub.n X wherein A is a polybutadiene block having a 1,2-vinyl content of less than 25% by weight and B is a copolymer block containing 50% by weight or more of a conjugated diene compound whose vinyl content is 25% by weight or more, X is a coupling agent residue and n is an integer of 3 or more, and (b) a hydrogenation product of a straight chain block copolymer represented by the structural formula A-B wherein A and B are as defined above, the weight ratio of the component (a) to the component (b) being 100/0 to 5/95, and a hydrogenated block copolymer composition comprising (I) 1 to 99 parts by weight of said hydrogenated block copolymer or hydrogenated block copolymer mixture and (II) 99 to 1 part by weight of a thermoplastic resin and/or a rubbery polymer. Said hydrogenated block copolymer or hydrogenated block copolymer mixture can be pelletized and is excellent in the improving effect on impact resistance, heat resistance, stiffness, processibility and appearance of molded article when used as a quality-improving agent for a thermoplastic resin. Said hydrogenated block copolymer composition is a composition having excellent balance of impact resistance, heat resistance, stiffness, processibility and appearance of molded article or a thermoplastic elastomer having excellent mechanical properties.