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:
Jan. 06, 1976
Filed:
Nov. 19, 1973
Applicant:
Inventors:
Adel Farhan Halasa, Bath, OH (US);
Tai Chun Cheng, Akron, OH (US);
Assignee:
The Firestone Tire & Rubber Company, Akron, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
260 / ; 260 946 ;
Abstract
A conjugated diene or a mixture of conjugated dienes or a mixture of a conjugated diene and an aryl vinyl monomer is polymerized with an alpha olefin in a reaction which is starved for monomer, and cyclization takes place. The catalyst includes a N,N,N', N'-tetra-alkyl alkylene diamine in which each alkyl group contains about 1 to 8 carbon atoms and the alkylene group contains 2 to 10 carbon atoms. N,N,N',N'-tetraethylenediamine is preferred. Other components of the catalyst include metallic sodium or potassium and alkyl sodium or potassium, preferably together with an alkali metal alkoxide.