Defoamer compositions for building-product mixtures

US9005361B2 · kind B2 · utility

Assignee

• Evonik Industries AG · DE

Inventors

• Frauke Henning · Essen, DE
• Anke Reinschmidt · Essen, DE
• Ralph Scheuermann · Bottrop, DE
• George-Hans Bayne · Essen, DE
• Kerstin Klein · Duisburg, DE
• Markus Roos · Essen, DE

Key dates

• Filing date: Dec 19, 2012
• Grant date: Apr 14, 2015
• Expiry date: Dec 19, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/46
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present application relates to compositions comprising at least one siloxane and at least one superplasticizer based on polycarboxylate ethers or sulphonates of lignin, melamine or naphthalene or of resins thereof, and to the use of such compositions as or in building-product mixtures or building products, especially mortar mixtures or concrete mixtures. Preferably the siloxane is a branched siloxane containing at least one “T” unit and containing at least two different polyoxyalkylene moieties.