Wacker-Chemie Gmbh

Anton Maier

Johann Schuster

Horst Muller

Ferdinand Pradl

Johann Mersch

Helmut Vorbuchner

Heinrich Glocklhofer

The organopolysiloxane compositions are prepared by mixing

Process for the preparation of storage-stable organopolysiloxane

The invention relates to a process for rendering particulate solids containing Si-OH groups hydrophobic which comprises reacting a water repellent containing an organo-silicon compound with particulate solids containing Si-OH groups with simultaneous mechanical loading of the reaction mixture, in which from 5 to 50 percent by weight of the particulate solids containing Si-OH groups are used, based on the total weight of the reaction mixture containing particulate solids and water repellent, and the use of the resultant hydrophobic particulate solids in compositions containing diorganopolysiloxanes, which can be cured to form elastomers.

Process for preparing hydrophobic particulate solids containing Si-OH

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Burghausen, Germany

Anton Maier