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:
Dec. 01, 1981
Filed:
Aug. 08, 1980
Applicant:
Inventor:
Joseph Odar, South Euclid, OH (US);
Assignee:
The B. F. Goodrich Company, Akron, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526 93 ; 526 92 ; 5263404 ;
Abstract
Substantially gel-free cis-1,4-polybutadiene is prepared by an improved process comprising adding in any order to the polymerization vessel butadiene, a cobalt catalyst, water and a solvent, provided that if the solvent is an aromatic or a chlorinated solvent at most 15 percent by weight based on the weight of butadiene is added at that stage. Thereafter is added either the entire amount of an aromatic or a chlorinated solvent, or the remainder of such a solvent if part of it was added earlier. Then an aluminum catalyst, comprised of one or more organoaluminum compounds, is added and the polymerization is carried out.