Patent ID: 7588065
Filing Date: 2009-09-15
Classification: B60C,C08L,Y10T

Abstract:
1. A pneumatic tire comprising in its bottom zone comprising a bead, an elastomeric internal filler mix in the form of a profiled member which is located axially to the outside of the upturn of the carcass reinforcement, or a reinforcement profile for the beads of the tire which is located radially above the bead wire and adjacent to said bead wire, said elastomeric internal filler mix comprising a cohesive and low-hysteretic rubber composition comprising an elastomeric matrix and a reinforcing filler, (i) wherein the elastomeric matrix comprises more than 70 phr of natural rubber or synthetic polyisoprene having double bonds, the majority of which are cis-1,4 bonds, (ii) wherein the reinforcing filler is a blend of carbon black having a BET specific surface area of between 30 and 160 m (iii) wherein the amount of silica is greater than or equal to the amount of carbon black in phr minus 5 phr, and (iv) wherein said blend of carbon black and silica is in an amount between 15 phr and 45 phr, and wherein the amount of silica is from 15 phr to 35 phr and wherein the elastomeric matrix further comprises a coupling agent and/or a covering agent.