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:
Jul. 21, 2015
Filed:
Mar. 26, 2014
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventor:
Koichiro Tajima, Chiba, JP;
Assignee:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F 236/10 (2006.01); C08F 236/14 (2006.01); C08F 4/48 (2006.01); C08G 77/54 (2006.01);
U.S. Cl.
CPC ...
C08F 236/10 (2013.01); C08F 236/14 (2013.01); C08G 77/54 (2013.01);
Abstract
Disclosed is a method for producing a conjugated diene-based polymer capable of affording a polymer composition useful as a material for tires excellent in fuel economy. Specifically, there is disclosed a method comprising polymerizing monomer components comprising a conjugated diene compound and an aromatic vinyl compound using an alkali metal-based polymerization initiator in the presence of a hydrocarbon solvent and an ether compound represented by the following formula (1), wherein R represents an alkyl group having 1 to 8 carbon atoms.