Tire sidewall composition containing silica having low PH.

摘要

The present invention relates to a pneumatic tire sidewall and to elastomeric compositions useful therefor. The elastomeric compositions are comprised of: (a) natural rubber, polybutadiene, or mixtures thereof; (b) from about 1.0 to 5.0 phr of a precipitated silica filler having a BET surface area of between 100 and 250 square meters per gram and a pH of from 4.0 to 6.5; (c) from about 1.5 to 10.0 phr of an antidegradant selected from the group consisting of amines, phenolics and mixtures thereof.