3,4-POLYISOPRENE-CONTAINING RUBBER BLEND MIXTURES FOR TIRE TREADS

摘要

A rubber blend composition which contains 3,4- polyisoprene having a 3,4-content from 55 to 75%, a glass transition temperature from 0 to -25.degree.C, a number average mole- cular weight of at least 200,000 and an inhomogeneity of less than 1.8. The rubber composition is particularly useful for tyre treads, which show an improved wet skid resistance coupled with balanced abrasion and rolling resistance properties.