Patent ID: 8710254

Claim:
A method for producing organooligosilsesquioxanes of the formula (I) [RSiO 3/2 ] z (I) where R represents moieties of general formula (II) —O—SiR 1 2 Y (II), by reacting of silicates of formula (III) (W 4 NOSiO 3/2 ) z (III), with not more than 1.3×50×z mol of disiloxane compounds of general formula (IV), R 1 2 YSi—O—SiR 1 2 Y (IV), per 100 mol of the silicates of the formula (III), wherein R 1 independently are divalent C 1 - to C 6 -hydrocarbon or C 1 - to C 6 -alkoxy moieties, Y independently are hydrogen or a halogenated or nonhalogenated C 1 - to C 10 -hydrocarbon moiety, W is a C 1 - to C 4 -alkyl moiety, and z is 6, 8 or 10, reacting taking place in the presence of a precipitant which is liquid at at 25° C. and 0.1 Mpa and in which at a reaction temperature of 0° C. to 60° C., at most 1 g of organooligosilsesquioxanes of formula (I) are soluble in 100 ml of precipitant, wherein the resultant organooligosilsesquioxane of formula (I) crystallizes out in the reaction medium at a purity of 95-100%, measured via 1 H NMR, during the reaction or directly after the reaction.