Patent ID: 7491767
Filing Date: 2009-02-17
Classification: B60C,C08K,C08L,Y02T

Abstract:
1. A tire comprising a tread incorporating an elastomeric composition reinforced with an inorganic filler, said composition comprising: (i) a diene elastomer; (ii) as reinforcing inorganic filler, more than 80 phr of a silica having the following features: (a) a BET specific surface area within a range from 60 to 90 m (b) an average particle size d (iii) a coupling agent; and (iv) a vulcanization system based on sulfur, wherein the diene elastomer comprises at least 50 phr of a butadiene elastomer selected from the group consisting of polybutadienes, styrene-butadiene copolymers and mixtures of these elastomers, and wherein the coupling agent is a polysulfurised silane, and the amount of the polysulfurised silane is within a range from 3 to 4.5 phr.