Process for preparing a polyoxyalkylene carbonate polyol

US12384869B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Elisabeth Vogelsang · Cologne, DE
• Joerg Hofmann · Krefeld, DE
• Klaus Lorenz · Worms, DE
• Philipp Sander · Grevenbroich, DE
• Stefan Werda · Jüchen, DE
• Mike Schuetze · Leverkusen, DE

Key dates

• Filing date: Mar 26, 2021
• Grant date: Aug 12, 2025
• Expiry date: Oct 30, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2261/126
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing a polyoxyalkylene carbonate polyol by reacting a polyoxyalkylene polyol with a cyclic carbonate in the presence of an amine catalyst. The invention further relates to polyoxyalkylene carbonate polyols obtainable using the method according to the invention and to a process for preparing polyurethanes by reacting the polyoxyalkylene carbonate polyols according to the invention with polyisocyanates.