Organooligosilsesquioxanes

A compound of the formula

• [RSiO.sub.3/2 ].sub.z (I)
• in which
• z is 6, 8 or 10;
• and R is a radical selected from the group consisting of the formulas --CH.sub.2 CH.sub.2 --X (II), --CH(CH.sub.3)--X (III) and --O--Si(R'.sub.2)--Y (IV), with the proviso that up to z-1 of the R radicals can also be radicals of the formula --O--SiR' .sub.3, in which X is a radical selected from the group consisting of a monovalent radical and one-half of a divalent radical selected from the group consisting of the formulas ##STR3## R' is selected from the group consisting of C.sub.1 - to C.sub.6 -alkyl, C.sub.1 - to C.sub.6 -alkoxy and phenyl radicals;
• R" is selected from the group consisting of C.sub.1 - to C.sub.18 -alkyl radicals, and C.sub.1 -to C.sub.18 -alkyl radicals which are substituted by radicals selected from the group consisting of the formulas (V) and (VI);
• R' " is selected from the group consisting of divalent C.sub.1 - to C.sub.18 -hydrocarbon radicals, radicals of the formula --(R' .sub.2 SiO).sub.n --;
• and mixtures thereof;
• Z is selected from the group consisting of a halogen atom, --NH.sub.2 radical, N-piperidinyl, N-piperazinyl, N-morpholinyl radical, a C.sub.1 - to C.sub.6 --N-monoalkylamino and a C.sub.1 - to C.sub.6 dialkylamino radical;
• Y is selected from the group consisting of a hydrogen atom, a C.sub.2 - to C.sub.10 -hydrocarbon radical, a halogenated C.sub.2 - to C.sub.10 -hydrocarbon radical and a radical selected from the group consisting of formula (II) and (III);
• and n is an integer having a value of at least 1.