Silicone resin powder and a process for preparing the same

US4935484A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Matthias Wolfgruber · Burghausen, DE
• Bernward Deubzer · Burghausen, DE
• Volker Frey · Burghausen, DE

Key dates

• Filing date: May 16, 1988
• Grant date: Jun 19, 1990
• Expiry date: May 16, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2383/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Silicone resin powders are obtained by spray drying aqueous colloidal suspensions of organopolysiloxanes which are prepared by adding an alkoxysilane and/or a partial hydrolysate thereof and, if appropriate, mixed with an organo(poly)siloxane which is free of alkoxy groups and contains a maximum of 8 siloxane units per molecule, to water in the presence of an emulsifier at a maximum rate of 5 moles of organosilicon compound per hour per liter of water.