Organosols of organopolysiloxanes and a process for preparing the same

US5049636A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Matthias Wolfgruber · Burghausen, DE
• Bernward Deubzer · Burghausen, DE
• Volker Frey · Burghausen, DE
• Helmut Oswaldbauer · Stubenberg, DE

Key dates

• Filing date: Mar 30, 1989
• Grant date: Sep 17, 1991
• Expiry date: Mar 30, 2009

Classification

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

Abstract

Organosols of organopolysiloxanes are prepared by adding water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents to aqueous, colloidal suspensions of organopolysiloxanes obtained by adding at least one alkoxysilane and/or the partial hydrolyzate thereof, and, if appropriate, mixed with an organo(poly)siloxane free of alkoxy groups and having a maximum of 8 siloxane units per molecule, to water in the presence of emulsifiers at a maximum rate of 5 moles of organosilicon compound per hour and per liter of water, and subsequently removing the water by distillation.