Patent ID: 8394883

Claim:
A raw elastomeric composition comprising (a1), (a2), (b), (c) and (d) where (a1) is from 30 to 90% by weight of a partially hydrogenated vinylarene conjugated diene random elastomeric copolymer; (a2) is from 10 to 70% by weight of one or more diene rubbers; (b) is from 10 to 150 phr of silica; (c) is from 0.1 to 20 phr of a silane coupling agent; (d) is from 0.1 to 10 phr of a vulcanization agent; wherein (a1) and (a2) are elastomers and the total percentage by weight of the elastomers (a1) and (a2) in the composition is equal to about 100%; and the partially hydrogenated vinylarene conjugated diene random copolymer has a macromolecular structure with nodes that are statistically distributed along the macromolecular structure and from which polymeric chains branch off, and the bond between the nodes and the polymeric chain said branches is a carbon-carbon bond.