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. 05, 2022
Filed:
Mar. 26, 2018
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventor:
Hiroshi Aoshima, Ichihara, JP;
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 236/10 (2006.01); C08F 2/06 (2006.01); C08F 279/02 (2006.01); C08F 8/42 (2006.01); C08K 5/56 (2006.01);
U.S. Cl.
CPC ...
C08F 236/10 (2013.01); C08F 2/06 (2013.01); C08F 8/42 (2013.01); C08F 279/02 (2013.01); C08K 5/56 (2013.01);
Abstract
The method for producing a conjugated diene-based polymer of the invention comprises step 1 in which a polymerization initiator is added to a monomer including a conjugated diene compound in a hydrocarbon solvent to obtain a polymerization solution, and step 2 in which a polymerization initiator is further added to the polymerization solution either once or two or more times to obtain a polymer with an active end, wherein in step 1 and/or step 2, a modifying agent is added which has a functional group that is copolymerizable with the conjugated diene compound.