Mannesmann Aktiengesellschaft

Chemische Fabrik Gruenau Gmbh

Oskar M Schmitt

Dieter Annemaier

Stefan Keipl

Werner Siegmund, Deceased

Otto J Friedrich

Volker Weidmann

Wilhelm Kamereit

Wilhelm Kaemereit

Powdery hydrophobic filler for bituminized traffic surfaces

Preparation of a fine-grained mixture having hydrophobic properties and a grain size substantially less than 0.2 mm and preferable less than 0.1 mm for asphalt-treatment and de-icing, having a hydrophobic component with a hydrophilic component of at least 50% by weight of the mixture and having 55-99.5% by weight of a residual salt which results from the production of glycerol and 45-0.05% by weight of an additive consisting of salts, oxides, hydoxides, and combinations thereof, in the moist condition and at least partially ground with the residual salt, and containing alkali-earth metal or other non-alkali metals as cations.

Method for the preparation of a fine-grained mixture having hydrophobic

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Stolberg, Germany

Oskar M Schmitt