Abstract: At least one (poly)thio alkoxy and/or halosilane is/are prepared by reaction of at least one sulfur-containing reagent with at least one alkoxy and/or halosilane, wherein an ionic addition of a sulfur-containing reagent to an alkoxy and/or halosilane is preferably conducted with thermal and/or actinic activation; the novel polythio alkoxy and/or halosilanes of formula (III.2) thus prepared are particularly useful as coupling agents in elastomeric compositions containing a white filler of the silica type and having the formula (III.2) wherein, for example, R1.1 and R1.3=methyl and R1.2=ethoxy.

Abstract: Functionalized organomonoalkoxy (or monohydroxy) silanes, in particular alkenyl (allyl) functionalized silanes, are useful as intermediates in organic synthesis, and are prepared by reacting dialkyldialkoxysilanes with an organic halide compound (allyl halide) (III) in an ether solvent (SI), such compound (III) being suited to substitute the alkoxy groups by functionalized groups, for example alkenyl groups.

Abstract: At least one polythio alkoxy and/or halosilane is/are prepared by reacting at least one sulfur-containing reagent (Rs) with at least one alkoxy and/or halosilane; intermediates therefor include the thio alkoxy and/or halosilanes of formula (CH3CH2O)(Me)2Si—(CH2)3—S—CO—(CH2)5—CH3.

Abstract: At least one (poly)thio alkoxy and/or halosilane is/are prepared by reaction of at least one sulfur-containing reagent with at least one alkoxy and/or halosilane, wherein an ionic addition of a sulfur-containing reagent to an alkoxy and/or halosilane is preferably conducted with thermal and/or actinic activation; the novel polythio alkoxy and/or halosilanes of formula (III.2) thus prepared are particularly useful as coupling agents in elastomeric compositions containing a white filler of the silica type and having the formula (III.2) wherein, for example, R1.1 and R1.3=methyl and R1.2=ethoxy.