Th. Goldschmidt Ag

Herwig Fritsch

Gotz Koerner

Eckehard Schamberg

Hans-Ferdi Fink

Gerd Rossmy

Roland Sucker

Gunter Schmidt

Manfred Grasse

Herbert Quilitsch

A composition is disclosed which is useful for the water-repellent impregnation of porous mineral building materials. The composition is based on organosilicon compounds which contain alkoxy groups and comprises an emulsion which contains 2.5 to 25% by weight of an alkoxysilane of the formula

Preparation for the water-repellent impregnation of porous mineral

A composition for making building materials water-repellent, before or after they are shaped, the composition containing organoalkoxysiloxanes of the formula ##STR1## in which R.sup.1 is an alkyl or aryl radical, R.sup.2 is an alkyl radical with 1 to 4 carbon atoms, a=0.8 to 1.5, and b is not greater than 2. The composition contains

Preparation for making inorganic building materials water-repellent

In the disclosed method of preventing the formation of foam and destroying existing foam in an aqueous solution or dispersion, an effective amount of a composition comprising about 0.2 to 7.5 percent by weight of highly disperse silica or alumina with the balance being methylpolysiloxanepolyoxyalkylene mixed block polymer consisting essentially of

Defoaming composition and method of defoaming aqueous solutions or

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Gladbeck, Germany

Herwig Fritsch