Tread compositions for tires having low rolling resistance
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsAsahiro Ahagon, Makoto Misawa, Hiroshi Hirakawa, Kazuo Miyasaka
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Abstract
A tread composition for low rolling resistance tires, comprising 100 parts by weight of styrene-butadiene rubber or a styrene-butadiene rubber-based rubber blend and 3.2-5.0 parts by weight of sulphur.
Claims5
A tread composition for tires having low rolling resistance consisting essentially of, by weight, (A) 100 parts of a member selected from the group consisting of styrene-butadiene rubber alone and a mixture containing at least 50% of styrene-butadiene rubber and less than 50% of at least one member selected from the group consisting of natural rubber and synthetic diene rubbers, (B) 3.2-5.0 parts of sulphur and (C) at least 40 parts of carbon black.
A method for lowering the rolling resistance of tires comprising providing tires with a tread having a composition formed by admixing (A) 100 parts of a member selected from the group consisting of styrene-butadiene rubber alone and a mixture containing at least 50% of styrene-butadiene rubber and less than 50% of at least one member selected from the group consisting of natural rubber and synthetic diene rubbers, (B) 3.2-5.0 parts of sulphur and (C) at least 40 parts of carbon black having an iodine adsorption number of 60-100 gI.sub.2 /kg and a DBP adsorption number of at least 119 cc/100 g, said parts being by weight.
Dependencies are inferred from the claim text.