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:
Nov. 29, 2016
Filed:
Nov. 19, 2012
Applicant:
Bridgestone Corporation, Tokyo, JP;
Inventors:
Kevin M. McCauley, Akron, OH (US);
Steven Luo, Copley, OH (US);
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/52 (2006.01); C08F 36/04 (2006.01); C08F 136/06 (2006.01); C08F 2/40 (2006.01); C08F 4/54 (2006.01);
U.S. Cl.
CPC ...
C08F 136/06 (2013.01); C08F 36/04 (2013.01); C08F 2/40 (2013.01); C08F 4/545 (2013.01);
Abstract
A method for producing a polydiene, the method comprising the steps of: (i) forming an active catalyst by combining a lanthanide-containing compound, an alkylating agent, and a halogen source in the substantial absence of a sulfone, a sulfoxide, and a phosphine oxide; and (ii) polymerizing conjugated diene monomer in the presence of the active catalyst and a polymerization modulator selected from the group consisting of a sulfone, a sulfoxide, and a phosphine oxide.