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:
Apr. 19, 2016
Filed:
Aug. 22, 2012
Daisuke Hayata, Tokyo, JP;
Chigusa Yamada, Tokyo, JP;
Junichi Yoshida, Tokyo, JP;
Takaaki Matsuda, Tokyo, JP;
Yuichi Kitagawa, Tokyo, JP;
Daisuke Hayata, Tokyo, JP;
Chigusa Yamada, Tokyo, JP;
Junichi Yoshida, Tokyo, JP;
Takaaki Matsuda, Tokyo, JP;
Yuichi Kitagawa, Tokyo, JP;
Asahi Kasei Chemicals Corporation, Tokyo, JP;
Abstract
A method for producing a modified conjugated diene polymer comprising a polymerization step of obtaining a conjugated diene polymer containing a nitrogen atom in a polymer chain and an active end by copolymerizing a conjugated diene compound and a nitrogen atom-containing vinyl compound, or a conjugated diene compound, an aromatic vinyl compound and a nitrogen atom-containing vinyl compound by use of an alkali metal compound and/or an alkaline earth metal compound as a polymerization initiator, and a modification step of reacting a modifier.