Wacker Chemie Ag

Dominik Auer

Michael Stepp

Frank Sandmeyer

Daniel Schildbach

Karl-Heinz Felix

Solid alkali metal salts of organosilanols and/or their hydrolysis/condensation products are prepared by hydrolysis of organosilanes in water and in the presence of a basic alkali metal salt. The products contain predominately methyl and ethyl organic groups, and Cor higher hydrocarbon groups as well. The solid salts effectively hydrophobe building materials, while being easily mixed with water.

Organosiliconate powders, method for the production thereof and use thereof for hydrophobizing mineral building materials

Organosilanolate powders having a low cation to silicon ratio provide superior hydrophobing ability. The powders may be prepared on an industrial scale by hydrolysis of a silane with a basic salt solution, adding an inert organic solvent, and removing gaseous or alcoholic hydrolysis products by evaporation or distillation, precipitating the organosilanolate as a fine powder.

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Muehldorf, Germany

Dominik Auer