VERFAHREN ZUR HERSTELLUNG VON SILICIUMORGANISCHEN VERBINDUNGEN

Preparation of organosilicon compounds of the formula wherein R and R each represent, independently of each other, a straight- chain or branched alkyl group with 1 to 4 carbon atoms or a group of formula OR , R represents a group of formula R -(OR )m-, R represents a straight-chain or branched alkyl group with 1 to 4 carbon atoms, R represents a straight-chain or branched alkylene group with 2 to 4 carbon atoms, in which the R groups may be the same or different, R represents a straight-chain or branched alkylene group with 2 to 6 carbon atoms, and m is a number from 0 to 6, by adducting hydridosilanes of formula wherein R represents identical or different R groups or the OR group and R has the meaning given above, in the presence of a catalyst under temperature-controlled conditions onto a terminally unsaturated ether of formula R -(OR )m-OR < ) wherein m, R and R have the meanings given above and R represents a terminally unsaturated, straight-chain or branched alkenyl group with 2 to 6 carbon atoms, and transesterifying the adduct of formulas wherein m and R to R have the meanings given above and R < >are the same or different, in the case of inserting the group OR instead of one or more OR groups, either thermally or in the presence of a catalyst, by means of monofunctional hydroxy compounds of formula R -(OR )mOH (V> wherein m, R and R have the meanings given above, to give the organosilicon substances of formula (I).