Patent ID: 6220326
Filing Date: 2001-04-24
Classification: B60C,C08K,C08L

Abstract:
A tire comprised of a tread and supporting carcass wherein said carcass contains at least one carcass ply comprised of a cord reinforced rubber composition, wherein said cord is composed of a monofilament or of twisted filaments and wherein said cord reinforced rubber composition is comprised of, based on 100 phr of rubber, (A) rubber consisting essentially of about 60 to about 90 phr of natural cis 1,4-polyisoprene rubber about 10 to about 40 phr of cis 1,4-polybutadiene rubber wherein said cis 1,4-polybutadiene rubber consists of cis 1,4-polybutadiene rubber, and up to about 10 phr of at least one rubber selected from medium vinyl polybutadiene rubber (40 to 60 percent vinyl), styrene-butadiene rubber, styrene-isoprene rubber and/or styrene-isoprene-butadiene rubber, (B) about 15 to about 35 phr of carbon black having a D B P value in a range of about 100 to about 130 cm.sup.3 /100 g and an Iodine adsorption value in a range of about 90 to about 120 g/kg, and (C) about 2 to about 8 phr of tack and adhesion enhancing rosin acid; wherein said rosin acid is a natural rosin acid selected from at least one of wood rosin, tall oil rosin and gum rosin, and wherein said cord reinforced rubber composition is exclusive of any appreciable amount of epoxidized natural rubber, phenolic tackifier and silica.