Rubber composition for sidewall and pneumatic tire using the same
AssigneeSumitomo Rubber Industries, Ltd.
InventorsTakashi Nakamura, Tetsuya Kunisawa, Toshiro Matsuo
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Abstract
The present invention aims to provide a lightweight tire without decreasing durability and to reduce rolling resistance and improve steering stability of the tire. Specifically, the present invention relates to a rubber composition for a sidewall comprising 20 to 70 parts by weight of an inorganic filler, and 5 to 35 parts by weight of polypropylene powder, based on 100 parts by weight of a rubber component, which satisfies the following equation: (amount of polypropylene powder)≧(amount of inorganic filler+amount of polypropylene powder)/2.
Claims4
A rubber composition for a sidewall comprising 20 to 70 parts by weight of an inorganic filler, and 5 to 35 parts by weight of polypropylene powder, based on 100 parts by weight of a rubber component;
- which satisfies the following equation:
- (amount of polypropylene powder)≧(amount of inorganic filler+amount of polypropylene powder)/2.
Dependencies are inferred from the claim text.