HYDROGENATED BLOCK POLYMER, RESIN COMPOSITION, AND BLOCK POLYMER

WIPO Patent Application WO/1996/000741

A1

A block polymer having a weight-average molecular weight of 50,000 to 1,000,000 and composed of at least one polyisoprene block having a 1,4-bond content of at least 80 % and a weight-average molecular weight of 25,000 to 500,000 and at least one polyisoprene block having a 3,4-bond content of at least 30 % and a weight-average molecular weight of 25,000 to 500,000; a hydrogenated block polymer produced by hydrogenating the above polymer at a hydrogenation rate of at least 50 %; and a resin composition comprising 40-1 wt.% of the above hydrogenated polymer and 60-99 wt.% of a thermoplastic resin such as polypropylene. As compared with other resin compositions containing, for example, an elastomer, the invention composition has an excellent impact resistance which can well withstand low-temperature applications, is also excellent in mechanical strengths such as modulus of elasticity, and has a high melt flow rate, thus being excellent also in processability and moldability.

MAEDA KOUICHIROU (JP)
TOYOSHIMA TETUYA (JP)
FURUNO EIJI (JP)
TANAHASHI NAOKI (JP)
YOSHIDA KEIKO (JP)

PCT/JP1995/001259

January 11, 1996

June 23, 1995

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NIPPON ZEON CO (JP)
MAEDA KOUICHIROU (JP)
TOYOSHIMA TETUYA (JP)
FURUNO EIJI (JP)
TANAHASHI NAOKI (JP)
YOSHIDA KEIKO (JP)

C08F8/04; C08F297/02; C08L23/10; (IPC1-7): C08F8/04; C08F295/00

JPH05271324A	1993-10-19
JPH03188114A	1991-08-16
JPH01168743A	1989-07-04
JPS61238845A	1986-10-24

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