Verfahren zur Herstellung von Trialkylsiloxy-arylsiloxanen

884,807. Siloxane compositions. FARBENFABRIKEN BAYER A.G. July 17, 1959 [July 26, 1958], No. 24707/59. Class 2(7) A composition comprises a siloxane of the formula wherein R is a hydrocarbon radical of at least 2 C atoms and n is an integer from 1 to 10, and a liquid, pasty or waxy, organic compound, e.g. alcohols with a low water content such as methanol, ethanol, isopropanol, butanol, 2-ethylhexanol and amyl, cetyl, lauryl and stearyl alcohols; benzine, benzene, toluene, beeswax, mineral oil, ceresine, paraffin and petroleum; oleic and stearic acids; butyl-acetate, -oleate and -stearate, glycerol monostearate, isopropyllaurate, -myristate, -palmitate and -stearate, lanoline, methyl phthalate, sesame oil and olive oil; diethyl and diisopropyl ethers; chloroform, carbon tetrachloride and trichloroethylene. The siloxanes are obtained by cohydrolyzing a mixture of more than 1 mol. but not more than 3 mols. of (CH 3 )SiCl and I mol. of RSiCl 3 with half the molar amount of water as there are gram atoms of chlorine in the silane mixture, and subsequently heating the reaction mixture to 100‹ C. until it is free from HC1. If desired the reaction product may be fractionated. Siloxanes in which R is phenyl, n-butyl and ethyl are disclosed and their miscibility with organic compounds is compared with that of other siloxanes. Uses: mould release agents; cosmetic preparations. Specification 848,719 is referred to.