Wacker Chemie Ag

Thomas Frey

Frank Baumann

Volker Stanjek

Wolfram Schindler

Achim Schroeder-Ebensperger

Achim Schröder-Ebensperger

The invention provides a process for preparing silanes which possess an isocyanate function, in which the silanes, after their chemical preparation, are purified and, after the purification, are handled exclusively in an atmosphere with a relative air humidity below 10%.

Process for preparing isocyanatoorganosilanes

Isocyanate-functional silanes, particularly isocyanate-functional &#x3b1;-silanes, are prepared in good yield by a liquid phase thermolysis conducted in the presence of a catalyst at a pressure of &#x3e;100 mbar, or &#x3e;80 mbar when a thin-film evaporator is used.

Functional polymers having silyl end groups are prepared in a continuous process by polymer analogous reaction of a reactive polymer and inter-reactive silane. The polymer products are surprisingly uniform in properties and exhibit higher physicochemical properties as well.

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Burghausen, Germany

Thomas Frey