Asahi Kasei Chemicals Corporation

Asahi Kasei Kabushiki Kaisha

Chigusa Yamada

Junichi Yoshida

Takaaki Matsuda

Yuichi Kitagawa

Yukio Yamaura

Kenta Hisamura

Daisuke Hayata

The present invention provides a modified conjugated diene-based polymer, wherein the Mooney stress-relaxation rate measured at 110&#xb0; C. is 0.45 or less, and the modification percentage is 75% by mass or more.

Modified conjugated diene-based polymer and method for producing the same, and modified conjugated diene-based polymer composition

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.

Method for producing modified conjugated diene polymer, modified conjugated diene polymer, modified conjugated diene polymer composition, rubber composition and tire

A method for producing a modified conjugated diene-based polymer including wherein Rto Reach independently represent an alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 20 carbon atoms; Rrepresents an alkylene group having 3 to 10 carbon atoms; Rrepresents an alkylene group having 1 to 20 carbon atoms; m is an integer of 1 or 2; and n is an integer of 2 or 3.

Method for producing modified conjugated diene-based polymer, modified conjugated diene-based polymer, modified conjugated diene-based polymer composition, rubber composition and tire

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Tokyo, Japan

Chigusa Yamada