| abstract |
Sulfur containing organosilicon compounds having the formula: Z-Alk-Sx-Alk-Z in which Z is: <IMAGE> where R1 is alkyl of 1 to 4 carbon atoms, cycloalkyl of 5 to 8 carbon atoms or phenyl and R2 is alkoxy of 1 to 4 carbon atoms, cycloalkoxy of 5 to 8 carbon atoms or phenoxy. Alk is a divalent aliphatic hydrocarbon or a cyclic hydrocarbon group containing 1 to 8 carbon atoms and x is a number from 2 to 6 are used as cross-linking agents in rubber mixtures containing conventional vulcanization accelerators and a siliceous filler, and optionally carbon black. No sulfur is present. |