Defoamer and/or deaerator based on oil-in-water dispersions

US6649721B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Rainer Dyllick-Brenzinger · Speyer, DE
• Gunther Glas · Schweinfurt, DE
• Primoz Lorencak · Ludwigshafen, DE
• Robert Heger · Heidelberg, DE
• Günter Oetter · Bischofswerda, DE

Key dates

• Filing date: Feb 8, 2001
• Grant date: Nov 18, 2003
• Expiry date: Feb 8, 2021

Classification

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

Abstract

Antifoams and/or deaerators are based on oil-in-water emulsions which contain, in the hydrophobic oil phase, at least one compound effective as an antifoam and/or deaerator and, if required, further components, the oil-in-water emulsions containing from 0.01 to 3% by weight of a water-soluble, amphiphilic copolymer having acid groups or of a water-soluble salt thereof as a stabilizer.