Antifoam compositions comprising a mixture of organopolysiloxanes

US8530401B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Richard Becker · Burghausen, DE
• Willibald Burger · Burghausen, DE
• Holger Rautschek · Großenhain, DE

Key dates

• Filing date: Apr 4, 2011
• Grant date: Sep 10, 2013
• Expiry date: Apr 4, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/18
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Superior defoamer compositions contain a low viscosity linear organopolysiloxane, a higher viscosity, optionally branched organopolysiloxane, a polyethersiloxane with a low cloud point, and both colloidal silica and fumed silica.