Patent ID: 8273911

Claim:
A process for the preparation of at least one alkoxy-and/or halosilane (poly)sulfide, comprising reacting, via an ionic addition mechanism, at least one sulfur-containing reactant (Rs) with at least one alkoxy-and/or halosilane of formula (I): in which: the R 1 symbols, which may be identical or different, are each: a linear, branched or cyclic alkyl radical having from 1 to 20 carbon atoms, an aryl radical having from 6 to 18 carbon atoms, an —OR 2 alkoxy radical, wherein R 2 is a linear, branched or cyclic alkyl radical having from 1 to 20 carbon atoms or an aryl radical having from 6 to 18 carbon atoms, an arylalkyl radical or an alkylaryl radical (C 6 -C 18 aryl, C 1 -C 20 alkyl), a hydroxyl radical, or a halogen, with the proviso that at least one of these R 1 radicals is —OR 2 , —OH or a halogen and such R 1 radicals, when they are neither hydroxyl nor halogens, optionally bear at least one halogenated substituent; the Y symbol has the formula (II): in which: the R 3 and R 4 symbols, which may be identical or different, are each hydrogen or a monovalent hydrocarbon radical selected from the group consisting of a linear, branched or cyclic alkyl radical having from 1 to 20 carbon atoms and a linear, branched or cyclic alkoxyalkyl radical having from 1 to 20 carbon atoms; the R 5 symbol is CH 2 or CR 6 R 7 , wherein R 6 and R 7 , which may be identical or different, are each hydrogen or a monovalent hydrocarbon radical selected from the group consisting of a linear, branched or cyclic alkyl radical having from 1 to 20 carbon atoms and a linear, branched or cyclic alkoxyalkyl radical having from 1 to 20 carbon atoms; and the n symbol is an integer greater than or equal to 1.