Rubber composition, tread made therefrom and tyres containing these treads

摘要

A sulphur-vulcanisable rubber mixt. (I) contains 20-80 phr of a conjugated diene/vinyl-aromatic copolymer with a very low degree of long chain branching, a defo-elasticity (DIN 53514) of 15-25 mm and a Mooney viscosity (DIN 53523) of 30-80 units (II), which is obtd. by soln. polymerisation in hydrocarbon solvent, 10-50 phr polybutadiene with a very low degree of long chain branching and no Mooney transition (III), 10-30 phr polyisoprene with a 3,4-link content of 50-70 wt.% (by NMR) (IV) and 30-100 phr silica (phr = pts.wt. per 100 pts.wt. total elastomer). Also claimed are tyre treads contg. (I), and tyre with such treads.