Sumitomo Rubber Industries Limited

Satomi Yamauchi

Kenichi Uesaka

Takafumi Taguchi

Tetsuya Kunisawa

Shuichiro Ono

Takahiro Kawachi

Subaru Toya

Masako Nakatani

Yoji Imoto

Tetsuya Maekawa

Natsuki Maekawa

Naoya Omura

Ayuko Yamada

Masataka Hiro

Yoshihiro Kagawa

The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and processability in a balanced manner, and also provides a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a compound represented by formula (1) below, 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; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component. 

Rubber composition and pneumatic tire

The invention provides a rubber composition that can enhance fuel economy, wet-grip performance, abrasion resistance, and handling stability in a balanced manner, and a pneumatic tire using this composition. The invention relates to a rubber composition containing a rubber component, silica (1) having a nitrogen adsorption specific surface area of not more than 100 m/g, and silica (2) having a nitrogen adsorption specific surface area of at least 180 m/g, wherein the rubber component contains, based on 100% by mass of the rubber component, at least 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; and a total amount of silica (1) and silica (2) is 30-150 parts by mass per 100 parts by mass of the rubber component, 

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Kobe, Japan

Satomi Yamauchi