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:
Sep. 21, 1999
Filed:
Aug. 19, 1998
Applicant:
Inventors:
James Oziomek, Cuyahoga Falls, OH (US);
Thomas A Antkowiak, Wadsworth, OH (US);
Tristram W Bethea, York, SC (US);
Assignee:
Bridgestone Corporation, Akron, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
5261241 ; 526 84 ; 5261243 ; 5261253 ; 5261258 ; 526137 ; 526213 ; 526216 ; 5263404 ;
Abstract
There is disclosed a process for the regulation of the molecular weight of high cis polybutadiene prepared by polymerizing butadiene under solution polymerization conditions employing as the catalyst system a mixture of (a) organoaluminum compounds; (b) organonickel compounds; and (c) fluorine containing compounds; said polymerization being conducted in the presence of alkali or alkaline earth metal salts of organic carboxylic acids.