Use of alcohols which contain at least two urethane groups for producing polyether carbonate polyols

US10519276B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Urs Rauwald · Düsseldorf, DE
• Jörg Hofmann · Krefeld, DE
• Bert Klesczewski · Neunburg vorm Wald, DE
• Hartmut Nefzger · Pulheim, DE
• Aurel Wolf · Wülfrath, DE
• Jens Langanke · Mechernich, DE

Key dates

• Filing date: May 24, 2016
• Grant date: Dec 31, 2019
• Expiry date: Aug 3, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a method for producing polyether carbonate polyols by attaching alkyloxides and carbon dioxide to H-functional starter compounds, characterized in that at least one alcohol containing at least two urethane groups is used as the H-functional starter compound. The invention further relates to polyether carbonate polyols containing a structural unit of the formula (IV), wherein: R1 denotes a linear or branched C2 to C24-alkylene, which optionally can be interrupted by heteroatoms of O, S or N and can be substituted, preferably by CH2—CH2 or CH2—CH(CH3); R2 denotes a linear or branched C2 to C24-alkylene, C3 to C24-cycloalkylene, C4 to C24-alkylene, C5 to C24-aralkylene, C2 to C24-alkenylene, C2 to C24-alkynylene, each of which can optionally be interrupted by heteroatoms such as O, S or N and/or can be substituted with alkyl, aryl and/or hydroxyl groups, preferably C2 to C24-alkyls; R3 denotes H, linear or branched C1 to C24-alkyl, C3 to C24-cycloalkyl, C4 to C24-aryl, C5 to C24-aralkyl, C2 to C24-alkenyl, C2 to C24-alkynyl, each of which can optionally be interrupted by heteroatoms such as O, S or N and/or can each be substituted with alkyl, aryl and/…