Sumitomo Rubber Industries Limited

Sumitomo Electric Industries, Limited

Nagase Chemtex Corporation

Noboru Okabe

Kenichi Uesaka

Takashi Miki

Yuka Yokoyama

Tetsuya Kunisawa

Yoichi Mizuno

Hiromu Izumida

Takuya Horiguchi

Takafumi Taguchi

Tatsuhiro Tanaka

Takahiro Kawachi

Keiji Takagi

Isamu Tsumori

Kenya Watanabe

Masako Nakatani

Tsuyoshi Tsuchida

Subaru Toya

Fumiya Kato

Koji Fujisawa

Tetsuya Nakajima

Toru Iizuka

Masumi Suzuki

Tetsuya Hosomi

Dong Miao

Tetsuya Maekawa

Kenji Hamamura

Natsuki Maekawa

Ayuko Yamada

Naoya Omura

Reika Otake

Yumi Suzuki

Ayuko Yamana

Yuta Miseki

Yogun Kida

Natsuki Sugimoto

Masato Fushiki

Manabu Inoue

Toyohiro Nagano

Takuya Kurihara

According to a production method of a rubber composition for tire of the present invention comprising a rubber component (A) comprising at least one selected from the group consisting of a natural rubber and a synthetic diene rubber, a filler, a coupling agent (D) of (CHO)&#x2014;Si&#x2014;(CH)&#x2014;S&#x2014;CO&#x2014;CH, and a vulcanizing agent (E) comprising a vulcanizer and a vulcanization accelerator, the method comprising: a step X1 of kneading all amount of A, a part of the filler and a part of D, a step X2 of kneading the kneaded product of step X1, the remaining amount of the filler and D, and a step F of kneading the kneaded product of step X2 and E, it is possible to produce a rubber composition for tire in which fuel efficiency and abrasion resistance are improved in a good balance.

Production method of rubber composition for tire and tire

The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a silane coupling agent, wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component; and the silane coupling agent contains a mercapto group. 

Rubber composition and pneumatic tire

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Kobe, Japan

Noboru Okabe