Process for preparing high molecular weight polyether polyols

US9139691B2 · kind B2 · utility

Assignee

• Bayer Intellectual Property GmbH · DE

Inventors

• Klaus Lorenz · Worms, DE
• Jörg Hofmann · Krefeld, DE
• Horst Zwick · Dormagen, DE
• Christian Steinlein · Ratingen, DE
• Edward P. Browne · Cologne, DE

Key dates

• Filing date: Jun 26, 2012
• Grant date: Sep 22, 2015
• Expiry date: Jun 26, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2696
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of polyether polyols with equivalent molecular weights of from 8,000 to 20,000 g/mol from one or more H-functional starter compounds and one or more alkylene oxides in the presence of a double metal cyanide catalyst, characterized in that the alkylene oxides are metered into the reactor in the course of from 15 to 23 h.