Sulfur cured rubber composition containing epoxidized natural rubber and carboxylated nitrile rubber
AssigneeThe Goodyear Tire & Rubber Company
InventorPaul H. Sandstrom
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Abstract
A pneumatic tire having a sulfur cured rubber composition as a circumferential tread. The sulfur cured rubber composition is composed of, based on 100 parts by weight of rubber, from about 1.0 to 15 parts by weight of epoxidized rubber; from about 1.0 to 15 parts by weight of a carboxylated nitrile rubber; and 98 to 70 parts by weight of a rubber selected from the group consisting of medium vinyl polybutadiene, styrene-butadiene rubber, synthetic cis-1,4-polyisoprene, synthetic 3,4-polyisoprene, natural rubber, cis-polybutadiene, styrene-isoprene rubber, styrene-isoprene-butadiene rubber, acrylonitrile-butadiene rubber and mixtures thereof. The sulfur cured rubber composition is further composed of a silica filler and a silica coupling agent.
Claims10
A pneumatic tire having an outer circumferential tread wherein said tread comprises a sulfur cured rubber composition composed of, based on 100 parts by weight of rubber (phr);
- (a) 1.0 to 15 parts by weight of epoxidized natural rubber, wherein the level of epoxidized modification is in the range of from about 15 to 85 mole percent;
- (b) 1.0 to 15 parts by weight of a carboxylic acid group containing nitrile rubber;
- and
- (c) 98 to 70 parts by weight of a rubber selected from the group consisting of medium vinyl polybutadiene, styrene-butadiene rubber, synthetic cis-1,4-polyisoprene, synthetic 3,4-polyisoprene, natural rubber, cis-polybutadiene, styrene-isoprene rubber, styrene-isoprene-butadiene rubber, acrylonitrile-butadiene rubber and mixtures thereof,
- and wherein said rubber composition further comprises 5 to 85 parts by weight of a silica filler selected from the group consisting pyrogenic and precipitated silicas, and 0.5 to 8.5 parts by weight of a silica coupling agent.
Dependencies are inferred from the claim text.