in particular a methyl or phenyl radical if the organosilicon compounds are organopolysiloxanes at least 50 more preferably at least 90 of all radicals r are methyl or phenyl radicals examples of radicals r 1 are the examples given for radical r preferably the radical r 1 is a hydrogen atom or an alkyl radical having 1 to 8 carbon atom s optionally interrupted by ether oxygen atoms particular preference is given to the hydrogen atom and the methyl ethyl propyl and butyl radicals examples of radical x are the chlorine atom the oh group the group a u2032 and alkoxy radicals such as the methoxy ethoxy n propoxy isopropoxy 1 butoxy 2 butoxy 1 pentyloxy 1 hexyloxy 1 octyloxy 2 octyloxy isooctyloxy 1 decyloxy 1 dodecyloxy myristyloxy cetyloxy and stearyloxy radicals radical x is preferably a chlorine atom the radical a u2032 the oh group or the methoxy ethoxy propoxy butoxy myristyloxy cetyloxy or stearyloxy radical most preferably a chlorine atom the oh group or a methoxy ethoxy propoxy or butoxy radical examples of radical y 1 are alkylene radicals such as the methylene ethylene propylene 2 methylpropylene butylene pentylene hexylene heptylene octylene nonylene undecylene and heptadecylene radicals cyclic and polycyclic alkylene radicals such as the cyclohexylene methylcyclohexylene dimethylcyclohexylene and norbornylene radicals unsaturated alkylene radicals such as the ethenylene 1 propenylene 1 butenylene and 2 butenylene radicals ether and polyether functional alkylene radicals and alkylene radicals which are interrupted by a carboxylic acid derivative group for example a carboxylic.