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AssigneeCovestro Deutschland AG
InventorsJörg Hofmann, Monika Heinz, Hartmut Nefzger, Kai Laemmerhold, Bert Klesczewski, Thomas E. Müller, Aurel Wolf, Jens Langanke
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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.
A process for preparing polyether carbonate polyols, the process comprising an addition of alkylene oxides and carbon dioxide onto H-functional starter compounds comprising at least one urethane alcohol of formula (II)
A polyurethane foam prepared by reacting a polyisocyanate with a polyether carbonate polyol containing a structural unit of the formula (IV)
Dependencies are inferred from the claim text.