Method for producing polyether carbonate polyols

US8946466B2 · kind B2 · utility

Assignee

• Bayer Intellectual Property GmbH · DE

Inventors

• Christoph Gürtler · Cologne, DE
• Jörg Hofmann · Krefeld, DE
• Aurel Wolf · Wülfrath, DE
• Stefan Grasser · Leverkusen, DE

Key dates

• Filing date: May 13, 2011
• Grant date: Feb 3, 2015
• Expiry date: Jun 22, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2663
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the preparation of polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides and carbon dioxide in the presence of at least one double metal cyanide catalyst, wherein the cyanide-free metal salt, the metal cyanide salt or both the mentioned salts used for the preparation of the double metal cyanide catalyst contain(s) from 0.3 to 1.8 mol base equivalents (based on 1 mol of the metal cyanide salt used for the synthesis of the catalyst) of alkaline metal hydroxide, metal carbonate and/or metal oxide.