Patent ID: 6776206
Filing Date: 2004-08-17
Classification: B60C,C08L,Y10T

Abstract:
A radial tire comprising a steel cord reinforced carcass ply and an apex of a composition comprised of, based on 100 parts by weight rubber, (A) about 80 to about 97 parts by weight of at least one diene rubber selected from the group consisting of natural rubber, synthetic cis 1,4-polyisoprene rubber and cis 1,4-polybutadiene rubber; and (B) about 3 to about 20 parts by weight of a trans 1,4-polybutadiene rubber having about 75 to about 85 percent by weight trans 1,4-content, about 12 to about 18 percent by weight of vinyl 1,2-content and about 3 to about 8 percent by weight cis 1,4-content and, in its uncured state, a first major melting point in the range of about 35Â° C. to about 45Â° C. and a second minor melting point in the range of about 55Â° C. to about 65Â° C.