Patent ID: 6767945
Filing Date: 2004-07-27
Classification: C08K,C08L

Abstract:
An uncured tire sidewall composition which comprises a blend of at least one highly unsaturated rubber selected from the group consisting of cis-polybutadiene and natural rubber and optionally a less unsaturated rubber, with process- and performance-enhancing ingredients, and a combination of from about 30 phr to 75 phr of reinforcing filler, the major portion by weight of which is carbon black, from about 0.05 to less than 1 phr (part per hundred parts by weight of rubber) of a t-alkanolamine, the alkanol having from 1 to 5 carbon atoms, and from about 0.1 phr to 10 phr of a rosin acid tackifier, the composition when extruded into a strip for a sidewall of a tire, yielding an uncured surface having an 60Â° Erichsen Pico Glossmeter Model 500 reading of less than 5.