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:
Sep. 15, 2020
Filed:
Jan. 28, 2016
Applicant:
Bridgestone Corporation, Chuo-ku, JP;
Inventors:
Joshua S. Dickstein, Copley, OH (US);
Joshua Abell, Franklin, TN (US);
Laura S. Kocsis, Copley, OH (US);
Kevin McCauley, Akron, OH (US);
Assignee:
Bridgestone Corporation, Chuo-ku, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F 136/06 (2006.01); C08F 2/60 (2006.01); C08F 2/02 (2006.01); C08F 136/08 (2006.01); C08F 4/42 (2006.01); C08L 9/00 (2006.01); C08L 21/00 (2006.01);
U.S. Cl.
CPC ...
C08F 136/06 (2013.01); C08F 2/02 (2013.01); C08F 2/60 (2013.01); C08F 4/42 (2013.01); C08F 136/08 (2013.01); C08L 9/00 (2013.01); C08L 21/00 (2013.01); C08L 2205/02 (2013.01);
Abstract
A method for preparing cis-1,4-polydienes, the method comprising the steps of preparing a preformed, active lanthanide-based catalyst, aging the active lanthanide-based catalyst for more than 5 days to thereby formed an aged catalyst, and introducing the aged catalyst and conjugated diene monomer to be polymerized to thereby form an active polymerization mixture in which the conjugated diene monomer is polymerized to form a polydiene having a reactive chain end.