Method for producing polyether carbonate polyols

US10125217B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Jörg Hofmann · Krefeld, DE
• Hans-Georg Pirkl · Leverkusen, DE
• Kai Laemmerhold · Aachen, DE
• Hartmut Nefzger · Pulheim, DE
• Matthias Wohak · Dormagen, DE
• Stefanie Braun · Cologne, DE
• Christoph Gürtler · Cologne, DE
• Aurel Wolf · Wülfrath, DE
• Jens Langanke · Mechernich, DE

Key dates

• Filing date: Oct 20, 2014
• Grant date: Nov 13, 2018
• Expiry date: Oct 20, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2675
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for producing polyether carbonate polyols through an addition reaction of alkylene oxides and carbon dioxide onto one or more H-functional starter substances in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, characterized in that one or more H-functional starter substances containing at least 1000 ppm of component (K) is/are continuously metered into the reactor during the reaction, where component (K) is selected from at least one compound containing a phosphorus-oxygen bond and a phosphorus compound that can form one or more P—O bonds through reaction with OH-functional compounds.