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:
Dec. 31, 2024
Filed:
Feb. 20, 2023
Applicants:
Bridgestone Corporation, Chuo-ku, JP;
Bridgestone Americas Tire Operations, Llc, Akron, OH (US);
Inventors:
Steven M. Baldwin, Akron, OH (US);
James J. Kuhel, III, Akron, OH (US);
Assignees:
Bridgestone Corporation, Chuo-ku, JP;
Bridgestone Americas Tire Operations, LLC, Nashville, TN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/54 (2006.01); C08F 2/06 (2006.01); C08F 36/06 (2006.01);
U.S. Cl.
CPC ...
C08F 4/545 (2013.01); C08F 2/06 (2013.01); C08F 36/06 (2013.01);
Abstract
Without significantly impacting monomer conversion, the cis-1,4 mer content of conjugated diene mer in polymers can be increased by adding one or more Lewis bases to a catalyst composition that includes a Group 3 metal atom-containing carboxylate. This effect can be seen even at above average monomer concentrations.