Diene rubber composition reinforced with white filler, comprising as coupling agentwhite filler/elastomer a multifunctionalized polyorganosiloxane

摘要

The invention concerns a rubber sulfur-vulcanizable composition designed for manufacturing tire treads, comprising at least a diene elastomer, a white filler as reinforcing filler and as coupling agent (white filler/elastomer) a multifunctionalized polyorganosiloxane comprising per molecule: a) at least a first siloxyl unit bearing, on the silicon atom, at least one linear or branched C1-C15 alkoxyl radical; and b) at least a second siloxyl unit bearing, on the silicon atom, at least one radical of general formula Z-SH, Z being a linear or branched divalent hydracarbon, comprising preferebly 2 to 30 carbons.