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Title:
AROMATIC VINYL/CONJUGATED DIENE COPOLYMER RUBBER, PRODUCTION THEREOF, AND RESIN COMPOSITION
Document Type and Number:
Japanese Patent JP3876940
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide an arom. vinyl/conjugated diene copolymer rubber which is excellent both in high-temp. melt stability and in effect on improving low- temp. impact strength and to provide a process for producing the same.
SOLUTION: This copolymer rubber has a combined arom. vinyl content of 36-39 wt.%, a combined vinyl content in conjugated diene parts of 30 wt.% or lower, a ratio (Mw/Mn) of wt. average mol.wt. (Mw) to number average mol.wt. (Mn) of 1.20 or lower, and a wt. average mol.wt. (Mw) of 100,000-250,000. A resin modifier contg. the copolymer rubber as the acting component is provided, and a resin compsn. contg. a resin and a rubber component contg. the copolymer rubber is also provided. The resin compsn. is prepd. by subjecting an arom. vinyl alone or together with a monomer copolymerizable therewith to free radical polymn. in the presence of a rubber component contg. the copolymer rubber.


Inventors:
Tetsuya Toyoshima
Hiroaki Matsuda
Application Number:
JP12359297A
Publication Date:
February 07, 2007
Filing Date:
April 25, 1997
Export Citation:
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Assignee:
Zeon Corporation
International Classes:
C08F212/06; C08L9/06; C08F212/04; C08F236/04; C08F279/00; C08F287/00; C08L53/02; C08L101/00; (IPC1-7): C08F212/06; C08F236/04; C08F279/00; C08L9/06; C08L101/00
Domestic Patent References:
JP3068612A
JP9316132A
JP60240746A
JP2051543A
JP5331349A
Attorney, Agent or Firm:
Shigeaki Nishikawa