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:
Oct. 31, 1978
Filed:
Dec. 09, 1976
Applicant:
Inventors:
Michel M Avaro, 13500 Martigues, FR;
Pierre M Mangin, 13500 Martigues, FR;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
2524 / ; 526151 ; 526159 ; 526169 ;
Abstract
An olefin polymerization catalyst is prepared in two steps. In the first step, a chemically reducing solid is prepared by polymerizing an olefin in contact with solid particles of a compound of a transition metal from sub-groups IV A, V A and VI A in a lower valency state in the presence of an organomagnesium compound and terminating the polymerization when the quantity of olefin polymerized is from 50 mg.-50 g. per mg-atom of transition metal. In the second step, the chemically reducing solid prepared in the first step is contacted with reducible compounds of transition metals from sub-groups IV A, V A and VI A to effect reduction thereof.