Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1995-03-31
1997-01-21
Zemel, Irina
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 89, 525314, 525227, 525232, 525179, 525184, 525167, C08F29702, C08L 5300
Patent
active
055960413
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.
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Goshima Kunio
Hasegawa Minoru
Hashiguchi Yoshiharu
Higuchi Yoshiyuki
Takemura Yasuhiko
Japan Synthetic Rubber Co. Ltd.
Zemel Irina
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