Use of water-insoluble polyoxyalkylene-polysiloxane block copolymers for defoaming aqueous media

US6433028B1 · kind B1 · utility

Assignee

• GOLDSCHMIDT HOLDING GMBH · DE

Inventors

• Thomas Ebbrecht · Bochum, DE
• Wolfgang Josten · Essen, DE
• Michael Keup · Essen, DE
• Stefan Silber · Krefeld, DE
• Roland Sucker · Werne, DE

Key dates

• Filing date: May 11, 2000
• Grant date: Aug 13, 2002
• Expiry date: May 11, 2020

Classification

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

Abstract

The invention relates to the use of water-insoluble polyoxyalkylene-polysiloxane block copolymers of the general average formula wherein the variables and indices are described herein as defoaming agents for aqueous media. This invention also provides for defoaming compositions comprising said water-insoluble polyoxyalkylene-polysiloxane block copolymers as well as coating materials, printing inks and cooling lubricants containing the inventive defoaming compositions.