Patent ID: 6022923
Filing Date: 2000-02-08
Classification: B60C,Y02T,Y10S

Abstract:
A pneumatic tire comprising a tread, said tread being made from a rubber composition comprising natural rubber and/or synthetic diene rubber and 10-85 parts by weight of a partially hydrophobizated silica based on 100 parts by weight of the natural rubber and/or synthetic diene rubberwherein the rubber composition is obtained by subjecting a precipitated silica to a surface treatment with an organosilicon compound so as to satisfy a hydrophobization ratio (A) of 15-65% represented by the following equation and an apparent density of 200-350 g/l, then dispersing the partially hydrophobizated silica in the natural rubber and/or synthetic diene rubber:A=100-(DBA/DBA').times.100wherein DBA is a di-n-butylamine adsorption of silica after surface treatment and DBA' is a di-n-butylamine adsorption of silica before surface treatment.