TIRE WITH A TREAD COMPRISING AN EMULSION SBR HAVING A HIGH TRANS CONTENT

摘要

The present invention relates to a tyre, the tread of which comprises a rubber composition comprising at least:
from 40 to 100 phr of an emulsion styrene/butadiene copolymer (E-SBR), referred to as first diene elastomer, the content of trans-1,4-butadienyl units of which is greater than 50% by weight of the total of the butadienyl units;optionally, from 0 to 60 phr of another diene elastomer referred to as second diene elastomer;from 90 to 150 phr of a reinforcing inorganic filler;a plasticizing system comprising:
according to a content A of between 10 and 60 phr, a hydrocarbon resin exhibiting a Tg of greater than 20° C.;according to a content B of between 10 and 60 phr, a plasticizer which is liquid at 20° C., the Tg of which is less than −20° C.;it being understood that A+B is greater than 45 phr.;The use of such an emulsion SBR, in combination with high contents of inorganic filler and of plasticizer, in the tread compositions of the tyre according to the invention makes it possible to obtain a greatly improved wet grip, in comparison with a control composition, without damaging the rolling resistance.

主权项

1. A tire, the tread of which comprises a rubber composition comprising at least:
from 40 to 100 phr of an emulsion styrene/butadiene copolymer “E-SBR”, referred to as first diene elastomer, the content of trans-1,4-butadienyl units of which is greater than 50% by weight of the total of the butadienyl units; optionally, from 0 to 60 phr of another diene elastomer referred to as second diene elastomer; from 90 to 150 phr of a reinforcing inorganic filler; a plasticizing system comprising: according to a content A of between 10 and 60 phr, a hydrocarbon resin exhibiting a Tg of greater than 20° C.; according to a content B of between 10 and 60 phr, a plasticizer which is liquid at 20° C., the Tg of which is less than −20° C.; it being understood that A+B is greater than 45 phr.