Patent ID: 8227538

Claim:
A rubber mixture having the composition comprising: from 30 to 100 phr of at least one diene rubber; from 20 to 200 phr of a filler; from 0 to 200 phr of other or further additives; wherein for class 1 silanes for PC tire tread applications: a vulcanization system of sulfur comprising elemental sulfur, sulfur donor and silane with a sulfur concentration caused by these ingredients; said sulfur concentration is 0.05 to 0.075 moles per 100 parts by weight of the rubber elastomer; free sulfur is 0 to 10 mole %; sulfur donor is 5 to 13 mole %; silane is 75 to 90mole %; if S to Si-ratio in silane is >1.6, no of Si-atoms >1, Mw per Si-atom ratio <390 g/mol; silica amounts to 45 to 150 phr; and 0.01 to 10 phr of at least one vulcanization accelerator; and all of the mole percentages are referred to the sulfur concentration of the vulcanization system.