Rubber composition and pneumatic tire using the same
AssigneeSumitomo Rubber Industries, Ltd.
InventorsNoriko Yagi, Kiyoshige Muraoka, Katsumi Terakawa, Tetsuo Mizoguchi
Life of this patent
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Abstract
To provide a pneumatic tire which can reduce fuel consumption without causing reduction in grip performance and after use of which can be degraded by microorganisms. The present invention relates to a rubber composition including 100 parts by mass of a rubber component including a natural rubber and/or a diene rubber and 0.5 to 80 parts by mass of a biodegradable aliphatic polyester. The biodegradable aliphatic polyester is preferably one or more species selected from polylactic acid, polycaprolactone and polyalkylene succinate.
Claims6
A pneumatic tire comprising a tread and a sidewall, wherein one or more portions of said tire is formed from a rubber composition comprising 100 parts by mass of a rubber component comprising a natural rubber and/or a diene rubber and 0.5 to 80 parts by mass of a biodegradable aliphatic polyester,
- wherein said biodegradable aliphatic polyester is polybutylene succinate having a glass transition temperature within the range of from −70° C. to 30° C.;
- and
- wherein said rubber composition further comprises silica in an amount within the range of from 5 to 150 parts by mass of based on 100 parts by mass of the rubber component and a silane coupling agent in an amount within the range of from 1 to 20% by mass based on the content of the silica.
Dependencies are inferred from the claim text.