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. 15, 1980
Filed:
Apr. 03, 1978
Applicant:
Inventors:
Toshio Ibaragi, Kawasaki, JP;
Kunio Satake, Yokohama, JP;
Tsuyoshi Yamada, Yokosuka, JP;
Kiyoshi Hayakawa, Yokohama, JP;
Assignee:
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525 70 ; 525195 ;
Abstract
High-impact polystyrene composition is produced by radical polymerization, e.g. bulk or bulk-suspension polymerization, of styrene having dissolved therein 2 to 20% by weight of one or more polybutadienes prepared by solution polymerization using an organic lithium compound as catalyst, said polybutadienes having (1) 1,2-vinyl content of more than 15 to 35% and cis-1,4 content of 20 to 85%, and (2) Mooney viscosity of 25 to 85, 5% styrene solution viscosity at 25.degree. C. being 50 to 200 cps and between 1.5 and 3.0 of the Mooney viscosity.