Process for preparing aqueous emulsions of high-molecular-weight organopolysiloxanes

US5039724A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Ulrich Demlehner · Emmerting, DE
• Bernward Deubzer · Burghausen, DE
• Hans Mayer · Frankfurt am Main, DE
• Erich Pilzweger · Julbach, DE

Key dates

• Filing date: Oct 23, 1989
• Grant date: Aug 13, 1991
• Expiry date: Oct 23, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2383/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for preparing aqueous emulsions from high-molecular-weight organopolysiloxanes which are solid at room temperature, in the absence of organic solvents, which comprises dissolving the high-molecular-weight organopolysiloxane which is solid at room temperature in a low-molecular-weight organo(poly)siloxane which is liquid at room temperature, and emulsifying this solution with water in the presence of an emulsifier and other additives, if desired.