HIGH-STYRENE CONTENT SBR IN RUBBER COMPOSITIONS
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United States of America Patent
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Issued Date -
Sep 17, 2015
app pub date -
Oct 24, 2012
filing date -
Oct 24, 2012
priority date (Note) -
Abandoned
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Abstract
Tire components made of rubber compositions that comprises, per 100 parts by weight of rubber (phr) 100 phr or an essentially unsaturated diene rubber, between 30 phr and 150 phr of a reinforcing filler and between 2 phr and 50 phr of a high-styrene content styrene-butadiene copolymer additive, the styrene-butadiene copolymer additive having a styrene content of between 50 wt. % and 90 wt. %. Alternatively, the styrene content of the styrene-butadiene copolymer additive may be between 55 wt. % and 80 wt. %. Because the rigidity of the resulting cured rubber composition is high, particular embodiments may include components around the bead area of a tire and tire treads, including winter tire treads.
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