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:
Aug. 10, 2021
Filed:
Oct. 31, 2017
Applicant:
Bridgestone Corporation, Chuo-ku, JP;
Inventors:
Kevin M. McCauley, Akron, OH (US);
Terrence E. Hogan, Uniontown, OH (US);
Assignee:
Bridgestone Corporation, Chuo-ku, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F 36/06 (2006.01); C08F 136/06 (2006.01); C08F 4/54 (2006.01); C08F 2/42 (2006.01); C08F 2/38 (2006.01);
U.S. Cl.
CPC ...
C08F 136/06 (2013.01); C08F 2/42 (2013.01); C08F 4/545 (2013.01); C08F 36/06 (2013.01); C08F 2/38 (2013.01); C08F 2410/01 (2013.01);
Abstract
Methods are described for the preparation of polymers using a lanthanide-based coordination catalyst and arresting polymerization using a reduced amount of a Lewis base while retaining the reactivity of the polymer chain ends toward functionalization agents. The Lewis base is a meso-enriched oxolanyl Lewis base. The resulting functionalized polymer has a higher level of purity and can be used in products such as tires.