Sumitomo Rubber Industries Limited

Ayuko Yamana

Tatsuya Miyazaki

Takashi Miki

Kenichi Uesaka

Yuka Yokoyama

Ryota Kitago

Soh Ishino

Yoichi Mizuno

Takuya Horiguchi

Takahiro Kawachi

Masako Nakatani

Fumiya Kato

Yuhei Yamashiro

Tetsuya Maekawa

Yumi Suzuki

Noboru Okabe

Natsuki Sugimoto

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

Provided are a rubber composition for a tire which achieves a balanced improvement in tensile properties at break and fuel economy while providing excellent conductivity; and a pneumatic tire including the rubber composition. The present invention relates to a rubber composition for a tire, including: a rubber component; a carbon black having a nitrogen adsorption specific surface area of 20 to 110 m/g and a DBP oil absorption of 60 to 130 ml/100 g; and a conductive carbon black having a nitrogen adsorption specific surface area of 900 m/g or larger, a DBP oil absorption of 300 ml/100 g or more, and a volatile content of 0.8% by mass or more, the rubber composition containing 0.1 to 3 parts by mass of the conductive carbon black per 100 parts by mass of the rubber component.

Rubber composition for tire, and pneumatic tire

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Kobe, Japan

Ayuko Yamana