Silicone-polyether copolymer systems and process for preparing them by means of an alkoxylation reaction

US8309664B2 · kind B2 · utility

Assignee

• EVONIK GOLDSCHMIDT GMBH · DE

Inventors

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

Key dates

• Filing date: Oct 26, 2009
• Grant date: Nov 13, 2012
• Expiry date: Sep 3, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/05
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for the preferential alkoxylation of silicone-polyether copolymers either alone or in compositions thereof containing, for example, excess polyether by use of double metal cyanide catalysts.