RUBBER COMPOSITION COMPRISING SPECIFIC LOW-SURFACE SILICA AND DIENE ELASTOMER WITH LOW VITREOUS TRANSITION TEMPERATURE

摘要

The invention relates to a tire whose tread comprises a rubber composition based on at least 90 to 100 phr of one or more diene elastomers known as very low glass transition temperature (Tg) having a Tg included in a ranging from -110 ° C to -80 ° C, selected from butadiene homopolymers, copolymers of butadiene and vinylaromatic monomer, having a vinylaromatic unit level of between 0 and 5% by weight, and mixtures of these last ; a reinforcing filler, said reinforcing filler comprising predominantly by weight a so-called low surface area silica, having a CTAB specific surface area of between 50 and 100 m 2 / g; a coupling agent providing the bond between the silica and the diene elastomer; a plasticizer system, said plasticizer system comprising at least more than 15 phr (parts by weight per hundred parts by weight of elastomer) of a so-called high Tg hydrocarbon resin having a Tg greater than 20 ° C; and a crosslinking system.