Compound antifoams for defoaming polymer dispersions and aqueous coating systems

US5994415A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Burghard Gruning · Essen, DE
• Petra Hinrichs · Bochum, DE
• Michael Keup · Essen, DE
• Frank König · Meiningen, DE
• Stefan Silber · Krefeld, DE
• Roland Sucker · Werne, DE
• Ellen Wallhorn · Essen, DE

Key dates

• Filing date: May 14, 1998
• Grant date: Nov 30, 1999
• Expiry date: May 14, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D19/0404
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to compound antifoams comprising alkoxylated partial esters--using from 3 to 60 mol of propylene oxide with or without from 1 to 10 mol of styrene oxide and/or from 1 to 10 mol of butylene oxide--of oligoglycerols, obtainable by condensation of 2 to 20 glycerol molecules, with C.sub.8 to C.sub.22 fatty acids and inorganic or organic solids for defoaming polymer dispersions and aqueous coating systems.