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US 7,732,522 B2Granted
Silica containing black sidewall compounds and tires comprising same
AssigneeBridgestone Americas Tire Operations, LLC
InventorsDavid G. Abdallah, Joseph M. Lanzarotta
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Abstract
Reduced hysteresis silica-containing black sidewall compounds having increased toughness properties are provided, as are methods for preparing the same. Tires comprising the black sidewall compounds prepared according to the present embodiments are also provided.
Claims15
A tire sidewall comprising, based on 100 parts by weight rubber (phr):
- (A) elastomers comprised of:
- (1) from 35 to 45 phr of cis-1,4-polyisoprene natural rubber;
- and
- (2) from 55 to 65 phr of cis-polybutadiene rubber;
- (B) from 32 to less than 55 phr of reinforcing filler comprised of:
- (1) from greater than 30 phr to 50 phr of carbon black;
- and
- (2) from 2 to less than 10 phr of silica;
- and
- (C) from 0.4 to 1.2 phr of a silane coupling agent, wherein the amount of the silane coupling agent is from 8% to 24% by weight of the silica.
7 more elements
Dependencies are inferred from the claim text.