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:
Mar. 26, 2019
Filed:
Mar. 27, 2015
Zeon Corporation, Tokyo, JP;
Eijun Ueda, Tokyo, JP;
Takashi Iizuka, Tokyo, JP;
ZEON CORPORATION, Tokyo, JP;
Abstract
A method of production of conjugated diene rubber including a first step of polymerizing a compound represented by a following formula (1) by using a polymerization initiator to obtain a polymer block of the compound represented by the formula (1) having an active end, and a second step of polymerizing a monomer containing at least a conjugated diene compound by using the active end of the polymer block, wherein, in the formula (1), Ris a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, Ris a hydrocarbon group having 3 to 20 carbon atoms and containing a ring structure, each of Rand Rindependently is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms which is substituted or unsubstituted, and X is arbitrary monovalent group.