Process for producing polyether polyols having primary hydroxyl end groups

US9029495B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Hartmut Nefzger · Pulheim, DE
• Erika Bauer · Höchst im Odenwald, DE
• Jörg Hofmann · Krefeld, DE
• Klaus Lorenz · Worms, DE
• Norbert Hahn · Franklin, US

Key dates

• Filing date: Jun 30, 2010
• Grant date: May 12, 2015
• Expiry date: Jun 30, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/3326
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for producing polyether polyols having primary hydroxyl end groups, comprising the steps of reacting a starter compound containing active hydrogen atoms with an epoxide under double metal cyanide catalysis, reacting the resulting product with a cyclic carboxylic anhydride and reacting this resulting product with ethylene oxide in the presence of a catalyst containing at least one nitrogen atom per molecule, excluding non-cyclic, identically substituted tertiary amines. The invention further relates to polyether polyols obtainable by this process, compositions containing said polyols and polyurethane polymers based on said polyols.