Heavy duty pneumatic tire
AssigneeBridgestone Corporation
InventorsTomohiro Kusano, Akira Matsuda
Life of this patent
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Abstract
In a heavy duty pneumatic tire comprising a tread, the tread is made of a rubber composition comprising 20-67 parts by weight of carbon black and 3-20 parts by weight of silica based on 100 parts by weight of diene based rubber, wherein the carbon black has a ratio of a dibutyl phthalate (DBP) absorption to a 24M4 DBP absorption (DBP absorption/24M4 DBP absorption) of not less than 1.20 and a ratio of the DBP absorption to a nitrogen adsorption specific area (N2SA) of not less than 0.8.
Claims5
A heavy duty pneumatic tire comprising a tread made of a rubber composition comprising 20-67 parts by weight of carbon black and 3-20 parts by weight of silica based on 100 parts by weight of diene based rubber,
- wherein the carbon black has a ratio of dibutyl phthalate (DBP) absorption to 24M4DBP absorption (DBP absorption/24M4DBP absorption) of not less than 1.20 and not more than 1.30 and a ratio of DBP absorption to nitrogen absorption specific area (N2SA) of not less than 0.8 and the silica has a dibutyl phthalate (DBP) absorption of 200-260 ml/100 g and a nitrogen adsorption specific area (N2SA) of 210-260 m2/g.
Dependencies are inferred from the claim text.