A diene rubber composition for tyre treads comprising diene elastomers, white fillers and a coupling agent comprising a mixture of specified poly(alkyl phenol) polysulfides and bis- triethoxysilylpropyl tetrasulfide.

摘要

A sulfur vulcanizable elastomeric composition comprising one or more diene elastomers, one or more reinforcing fillers and a coupling agent which consists of 10-90 wt.% and preferably 50-70 wt.% of a mixture of specified poly(alkyl phenol) polysulfides and 10-90 wt.% and preferably 30-50 wt.% of bis-triethoxysilylpropyl tetrasulfide. The poly(alkyl phenol) polysulfides are of formula (I). [Image] R : 1-20C and preferably 4-10C alkyl; n, n' : integer 1-8 and preferably 1-4; p : integer 0-50 and preferably 0-20. Independent claims are included for the coupling agent itself, for a molded article obtained by forming and heat treating the claimed composition.