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:
Jul. 18, 2006
Filed:
Dec. 17, 2003
Applicants:
Alessandro Balducci, Ravenna, IT;
Sandra Righi, Ravenna, IT;
Inventors:
Alessandro Balducci, Ravenna, IT;
Sandra Righi, Ravenna, IT;
Assignee:
Polimeri Europa S.p.A., Brindisi, IT;
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/52 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process is described for the preparation of polydienes with a low vinyl content and having a branched structure effected by means of the polymerization of conjugated dienes in the presence of catalysts based on rare-earth compounds. The resulting polymers are characterized in that they have a cis content varying from 80 to 96% and prove to be branched with consequent low viscosity values in solution.