Degussa Aktiengesellschaft

Degussa - Huls Ag

Thomas Gobel

Wolfgang Lortz

Jorg Munzenberg

Torsten Balduf

Stefan Wieland

Ulrich Deschler

Gerd Rainhard Zezulka

Hans Deusser

Andreas Stubbe

Joachim Pohlisch

Horst Grethe

Folker Wittmann

Andreas Gerdes

Michael Gunther

This invention relates to a process for the production of a homogeneously waterproofed concrete (integrally waterproofed concrete) in which an aqueous hydrolysable, emulsion containing organosilicon compounds is added before curing to the fresh concrete mix prepared from water, inorganic and optionally organic constituents, which emulsion contains at least one alkoxysilane and optionally an organosilicon compound acting as a surfactant.

Process for the production of integrally waterproofed concrete

Mixtures are disclosed of bis(silylorganyl)polysulfanes and silylorganylthiocyanates, which are produced by reacting polysulfanes with cyanides. The inorganic thiocyanate formed is subsequently allowed to react with a haloalkylalkoxysilane to form the silylorganylthiocyanate. These substances are used in plastic and rubber mixtures reinforced with silica and optionally carbon black.

Mixtures consisting of bis (silylorganyl) polysulfans and

A continuous method of producing .gamma.-aminopropyltrialkoxysilanes as well as mixtures of primary and secondary aminosilanes by reacting .gamma.-chloropropyltrialkoxysilane with ammonia is disclosed. The steps are:

Continuous method of producing .gamma.-aminopropyltrialkoxysilanes

A process is disclosed for the selective synthesis of silylalkyldisulphides by desulphurization of the corresponding polysulphides using nucleophilic reagents.

Process for the selective synthesis of silylalkyldisulphides

Surface-modified, pyrogenically produced silicon dioxide is obtained by placing a pyrogenically produced silicon dioxide in a know mixing device, spraying it with a chemical compound from the group:

Surface-modified silicon dioxides

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Hanau, Germany

Thomas Gobel