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:
Nov. 08, 1977
Filed:
Aug. 10, 1976
Applicant:
Inventors:
Isamu Yamazaki, Tokyo, JA;
Yoichi Toyama, Tokyo, JA;
Kiwami Hirota, Yokohama, JA;
Hisashi Takeuchi, Tokyo, JA;
Assignee:
Showa Denko Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
526142 ; 2524 / ; 526122 ; 526124 ; 526128 ; 526132 ; 526137 ; 526139 ; 526140 ; 526141 ; 526143 ; 526349 ; 526351 ; 526352 ; 526906 ;
Abstract
In the method of polymerizing .alpha.-olefins by contacting an .alpha.-olefin under polymerization conditions with a stereospecific catalyst comprising a titanium trichloride component and an organoaluminium compound, the improvement wherein said titanium trichloride component is ground during or after contact with a treating agent, said treating agent being selected from at least one of