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:
Jun. 16, 2015
Filed:
Mar. 24, 2014
Applicant:
Bridgestone Corporation, Tokyo, JP;
Inventors:
Zengquan Qin, Copley, OH (US);
Eiju Suzuki, Tokyo, JP;
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/52 (2006.01); C08F 4/70 (2006.01); C08F 232/06 (2006.01); C08F 4/80 (2006.01); C08F 36/04 (2006.01); C08L 9/00 (2006.01); C08L 21/00 (2006.01); B60C 1/00 (2006.01); B01J 31/12 (2006.01);
U.S. Cl.
CPC ...
C08F 4/80 (2013.01); Y10T 152/10495 (2015.01); B60C 1/00 (2013.01); C08F 36/04 (2013.01); C08F 232/06 (2013.01); C08L 9/00 (2013.01); C08L 21/00 (2013.01); C08F 4/52 (2013.01);
Abstract
A process for preparing a copolymer of an acyclic conjugated diene and a cyclic conjugated diene using a polymerization catalyst system comprising a transition metal compound or a lanthanide metal compound, an alkylating agent, and an inorganic halide alcoholate, and rubber compositions and tires comprising the same. The copolymer contains at least 90% acyclic conjugated diene monomer, has a number average molecular weight of between 40,000 and 300,000, and has a cis-bond content of at least 92%.