Polyethersiloxanes carrying alkoxysilyl groups and method for production thereof

US8283422B2 · kind B2 · utility

Assignee

• EVONIK GOLDSCHMIDT GMBH · DE

Inventors

• Frank Schubert · Neukirchen-Vluyn, DE
• Frauke Henning · Essen, DE
• Wilfried Knott · Essen, DE

Key dates

• Filing date: Nov 5, 2009
• Grant date: Oct 9, 2012
• Expiry date: Nov 5, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L83/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Alkoxysilyl-functional polyether-siloxanes and processes for preparing them by noble metal-catalysed SiC coupling of hydrogensiloxanes having SiH groups with unsaturated polyethers bearing alkoxysilyl groups or by alkoxylation of polyethersiloxanes or polysiloxanes by means of epoxy-functional alkoxysilanes in the presence of double metal cyanide catalysts.