Tire incorporating a rubber composition comprising a specific hydrocarbon resin

Abstract

The present invention relates to a tire comprising a rubber composition based on at least: - an elastomeric matrix comprising a styrene-butadiene copolymer A with Tg(A) varying in the range of -100°C to -60°C and a styrene-butadiene copolymer B with Tg(B) varying in the range of -70°C to -40°C, with 10°C ≤ Tg(B)-Tg(A) ≤ 60°C, Tg being measured according to ASTM D3418-12, - a reinforcing filler comprising silica, - a vulcanizing system, and - a plasticizing system comprising a hydrocarbon resin, which resin is based on a cyclic monomer selected from the group consisting of a distillation cut from a petroleum refinery stream, C4, C5, and C6 cyclic olefins, and mixtures thereof, and which resin of hydrocarbon has an aromatic proton content (H Ar, expressed in mol%), a glass transition temperature (Tg, expressed in °C) and a number-average molecular weight (Mn,expressed in g / mol) such that (1) H Ar > 6 mol% (2) Tg ≥ 95 - 2.2 * (H Ar), (3) Tg ≥ -53 + (0.265 * Mn) and (4) 250 g / mol ≤ Mn ≤ 600 g / mol.