Patent ID: 7253225
Filing Date: 2007-08-07
Classification: B60C,C08K,C08L

Abstract:
1. A tire tread comprising a cross-linked rubber composition having a Shore A hardness greater than 45 and less than 57, measured in accordance with Standard ASTM D 2240 of 1997, said composition comprising: greater than 25 phr and up to 100 phr, of one or more diene elastomers each having a glass transition temperature Tg between −75° C. and −40° C., less than 75 phr and down to 0 phr, of one or more diene elastomers each having a glass transition temperature Tg between −110° C. and −75° C., from 5 phr to 35 phr, of at least one hydrocarbon plasticizing resin miscible in said diene elastomer(s), and said resin having a glass transition temperature Tg between 10° C. and 150° C. and a number-average molecular weight between 400 g/mol and 2000 g/mol, and from 5 phr to 35 phr, of natural plasticizing compound, comprising at least one glycerol fatty acid triester, wherein the at least one glycerol fatty acid triester is sunflower vegetable oil having a Tg between −100° C. and −70° C., and wherein oleic acid represents in a mass fraction at least 60% of the total of fatty acid(s).