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:
Apr. 11, 1989
Filed:
May. 23, 1986
Applicant:
Inventors:
Akinobu Shiga, Ichihara, JP;
Masahiro Kakugo, Narashino, JP;
Hajime Sadatoshi, Ichihara, JP;
Hiroyuki Kora, Ichihara, JP;
Toshio Sasaki, Ichihara, JP;
Junpei Kojima, Ichihara, JP;
Kazuki Wakamatsu, Ichihara, JP;
Syozo Kawamata, Ichihara, JP;
Assignee:
Sumitomo Chemical Company Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525247 ; 525243 ; 525249 ; 525244 ; 525323 ; 525268 ; 525270 ; 525254 ; 525258 ; 525259 ; 525262 ;
Abstract
A process for the production of .alpha.-olefin block copolymer particles having excellent impact resistance at low temperature and excellent molding and processing characteristics, is disclosed. The process includes a two step gas phase polymerization procedure under specific conditions in the presence of a specific catalyst system.