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:
May. 29, 2018
Filed:
Dec. 03, 2014
Applicant:
Bridgestone Corporation, Chuo-ku, JP;
Inventors:
Kevin M. McCauley, Akron, OH (US);
Steven Luo, Copley, OH (US);
Assignee:
Bridgestone Corporation, Chuo-ku, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B60C 1/00 (2006.01); C08L 9/00 (2006.01); C08F 136/06 (2006.01); F16F 9/04 (2006.01);
U.S. Cl.
CPC ...
C08L 9/00 (2013.01); B60C 1/00 (2013.01); C08F 136/06 (2013.01); C08F 2410/04 (2013.01); C08L 2205/025 (2013.01); F16F 9/0409 (2013.01); F16F 2224/025 (2013.01);
Abstract
A process for preparing a blend of cis-1,4-polybutadiene and syndiotactic 1,2 polybutadiene, the process comprising the steps of (i) polymerizing 1,3-butadiene in the presence of a lanthanide-based catalyst to form a polymerization mixture including cis-1,4-polybutadiene, and (ii) polymerizing 1,3-butadiene in the presence of a cobalt-based catalyst within the polymerization mixture including cis-1,4-polybutadiene to form syndiotactic 1,2-polybutadiene and thereby produce a blend of cis-1,4-polybutadiene and syndiotactic 1,2-polybutadiene.