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Abstract

A process for the manufacture of a blocked mercaptosilane comprising: reacting at least one polysulfane-containing organosilicon compound of the general formula: (R.sup.1.sub.3 SiG).sub.2 S.sub.n (a) in which each R.sup.1 is independently methoxy, ethoxy or alkyl of from 1 to about 6 carbon atoms, provided, that at least one R.sup.1 group is methoxy or ethoxy, G is an alkylene group of from 1 to about 12 carbon atoms and n is from 2 to about 8, with at least one alkali metal, alkaline earth metal or a basic derivative of an alkali metal or alkaline earth metal to provide the corresponding metal salt of the polysulfane-containing organosilicon compound and; (b) reacting the metal salt of the polysulfane-containing organosilicon compound with an acyl halide or carbonyl dihalide to provide a blocked mercaptosilane.

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First Claim