Use of urethane alcohols for preparing polyether carbonate polyols

US9957352B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Jörg Hofmann · Krefeld, DE
• Monika Heinz
• Hartmut Nefzger · Pulheim, DE
• Kai Laemmerhold · Aachen, DE
• Bert Klesczewski · Neunburg vorm Wald, DE
• Thomas Ernst Müller · Aachen, DE
• Aurel Wolf · Wülfrath, DE
• Jens Langanke · Mechernich, DE

Key dates

• Filing date: Dec 12, 2014
• Grant date: May 1, 2018
• Expiry date: Dec 12, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a method for preparing polyether carbonate polyols by the addition of alkylene oxides and carbon dioxide onto H-functional starter compounds. The method is characterized in that at least one urethane alcohol according to formula (II) is used as an H-functional starter compound, wherein R 1 represents a linear or branched C2 to C24-alkylene which can be optionally interrupted by heteroatoms such as O, S or N and can be substituted; R2 represents a linear or branched C2 to C24-alkylene which can be optionally interrupted by heteroatoms such as O, S or N and can be substituted; R3 represents H, linear or branched C1 to C24-alkyl, C3 to C24-cycloalkyl, C4 to C24-aryl, C5 to C24-arylalkyl, C2 to C24-alkenyl, C2 to 24-alkinyl, that can each be optionally interrupted by heteroatoms such as O, S, or N and/or may each be substituted with alkyl, aryl, and/or hydroxyl.