| 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 represents a linear or branched C 2 to C 24 -alkylene which can be optionally interrupted by heteroatoms such as O, S or N and can be substituted; R 2 represents a linear or branched C 2 to C 24 -alkylene which can be optionally interrupted by heteroatoms such as O, S or N and can be substituted; R 3 represents H, linear or branched C 1 to C 24 -alkyl, C 3 to C 24 -cycloalkyl, C 4 to C 24 -aryl, C 5 to C 24 -arylalkyl, C 2 to C 24 -alkenyl, C 2 to 24 -alkinyl, that can each be optionally interrupted by heteroatoms such as O, S, or N and/or may each he substituted with alkyl, aryl, and/or hydroxyl. The invention further relates to polyether carbonate polyols that contain one urethane group, said polyether carbonate polyols being obtainable by the method according to the invention; the use of the polyether carbonate polyols according to the invention for preparing a polyurethane polymer; and the resulting polyurethane polymers. |