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:
Jan. 16, 2024
Filed:
Mar. 26, 2019
Zeon Corporation, Tokyo, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Zs Elastomers Co., Ltd., Tokyo, JP;
Takuro Sakurai, Tokyo, JP;
Takashi Iizuka, Tokyo, JP;
Mana Fujii, Sodegaura, JP;
Hisakatsu Hama, Sodegaura, JP;
ZEON CORPORATION, Tokyo, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
ZS ELASTOMERS CO., LTD., Tokyo, JP;
Abstract
A method for producing conjugated diene rubber is provided, including: a first step of obtaining a conjugated diene polymer chain having an active end by polymerizing a monomer comprising a conjugated diene compound and a vinyl compound having a functional group interactive with silica using a polymerization initiator in an inert solvent; a second step of reacting a siloxane compound with the active end of the conjugated diene polymer chain having the active end; and a third step of reacting a hydrocarbyloxysilane compound with the conjugated diene polymer chain with which the siloxane compound has been reacted that is obtained in the second step.