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. 05, 2016
Filed:
Dec. 27, 2012
Applicant:
Bridgestone Corporation, Tokyo, JP;
Inventors:
Kevin M. McCauley, Akron, OH (US);
Zengquan Qin, Copley, OH (US);
Joshua S. Dickstein, Copley, OH (US);
Steven Luo, Copley, OH (US);
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/52 (2006.01); C08F 136/04 (2006.01); C08F 136/06 (2006.01); C08F 4/54 (2006.01); C08F 36/04 (2006.01);
U.S. Cl.
CPC ...
C08F 136/06 (2013.01); C08F 4/545 (2013.01); C08F 36/04 (2013.01);
Abstract
A process for preparing a polydiene, the process comprising the steps of: polymerizing conjugated diene monomer with a metallocene complex catalyst system within a polymerization mixture that includes less than 20% by weight of solvent based on the total weight of the polymerization mixture, where the metallocene complex catalyst system includes the combination or reaction product of: (a) metallocene complex, (b) an alkylating agent, and optionally (c) a non-coordinating anion.