HYDROGENATED BLOCK COPOLYMER AND COMPOSITION THEREOF

Title:

HYDROGENATED BLOCK COPOLYMER AND COMPOSITION THEREOF

Document Type and Number:

WIPO Patent Application WO/1990/005753

Kind Code:

A1

Abstract:

A hydrogenated block copolymer having a number-average molecular weight of 40,000 to 700,000 and a thermoplastic resin composition comprising the same are disclosed. Said copolymer is obtained by hydrogenating a block copolymer (I) or (II) to such an extent that at least 80 % of the olefinically unsaturated bonds of said block copolymer are hydrogenated. Said block copolymer (I) is one having at least one polymer block A 90 wt % of which is composed of a vinyl aromatic compound, at least one polybutadiene polymer block B wherein 1,2-vinyl bonds account for 30 to 70%, and at least one polybutadiene polymer block C wherein 1,2-vinyl bonds account for less than 30%, with the proportions of the blocks A, B and C being specific, while said block copolymer (II) is one wherein the block copolymer (I) is bound to at least one of the polymer block units of A, B and C through a coupling agent residue to elongate or branch the polymer chain.

Inventors:

HATTORI IWAKAZU (JP)
OSHIMA NOBORU (JP)
SHIBATA TORU (JP)
TAKEUCHI YASUO (JP)

Application Number:

PCT/JP1989/001157

Publication Date:

May 31, 1990

Filing Date:

November 14, 1989

Export Citation:

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Assignee:

JAPAN SYNTHETIC RUBBER CO LTD (JP)

International Classes:

C08F8/04; C08F8/46; C08L23/02; C08F297/04; C08L53/00; C08L53/02; C08L101/00; (IPC1-7): C08F297/04; C08L53/02

Foreign References:

JPS5827740A	1983-02-18
JPS633054A	1988-01-08

Other References: