Abstract: A rubber composition having improved tear strength is based on 20 to 50 phr of copolymer containing ethylene units and 1,3-diene units, the ethylene units in the copolymer representing between 50 mol % and 95 mol % of the monomer units of the copolymer; 50 to 80 phr of polyisoprene comprising a mass content of 1,4-cis bonds of at least 90% of the mass of the polyisoprene; a filler comprising from 11 to 56 phr of carbon black and from 4 to 24 phr of silica, the weight of silica being less than or equal to 30% by weight relative to the total weight of carbon black and silica; and a vulcanization system. Rubber articles comprise such a rubber composition, in particular pneumatic tires, at least one sidewall of which comprises such a rubber composition.

Abstract: A rubber composition based on one or more diene elastomer(s), on at least one reinforcing filler, on at least one coupling agent, on at least one chemical crosslinking system, wherein the reinforcing filler comprises silica in the form of essentially spherical nanoparticles, the specific surface area of this silica ranging from 30 m2/g to 250 m2/g. Also disclosed is a process for producing such a composition and also semi-finished or finished articles comprising at least one such composition.

Abstract: A rubber composition based on one or more diene elastomer(s), on at least one reinforcing filler, on at least one coupling agent, on at least one chemical crosslinking system, wherein the reinforcing filler comprises silica in the form of essentially spherical nanoparticles, the specific surface area of this silica ranging from 30 m2/g to 250 m2/g. Also disclosed is a process for producing such a composition and also semi-finished or finished articles comprising at least one such composition.