A rubber composition is disclosed comprising a blend of, based on parts by weight per 100 parts by weight rubber (phr), where the term rubber excludes syndiotactic polybutadiene polymer: (A) a polymer alloy comprising 2 to 50 parts by weight of a dispersion of micro sized syndiotactic polybutadiene domains comprising filaments thereof, preferably primarily of filaments thereof, in 98 to 50 parts by weight cis 1,4-polyisoprene rubber; and (B) 100 phr of sulfur curable diene-based elastomers comprising cis 1,4-polyisoprene rubber, preferably the cis 1,4-polyisoprene rubber, and at least one additional diene-based elastomer; wherein the rubber composition comprises the alloy in a sufficient quantity to provide from 2 to 50 phr of the filamentary syndiotactic polybutadiene, and (C) 0 to 150 phr of a reinforcing filler comprising: (1) carbon black, or (2) a combination of silica or precipitated silica and carbon black. The rubber composition may be used in a tire. Also, a process of manufacturing such a rubber composition is disclosed.
Preparation of rubber compositions containing syndiotactic polybutadiene filament and rubber composition and tire
Herstellung von Kautschukzusammensetzungen enthaltend syndiotaktisches Polybutadien und Kautschukzusammensetzung und Reifen
Préparation de compositions de caoutchouc contenant un filament de polybutadiène syndiotactique et composition de caoutchouc et pneu
2015-11-04
Patent
Electronic Resource
English
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