METHOD FOR PRODUCING POLYETHER CARBONATE POLYOLS Russian patent published in 2018 - IPC C08G64/42 C08G64/34 C08K5/51 

FIELD: technological processes.

SUBSTANCE: invention relates to a method for producing polyether carbonate polyols, (i) in which one or more alkylene oxides and carbon dioxide being added to one or more H-functional starter substances in the presence of a double metal cyanide catalyst, wherein reaction mixture comprising said polyether carbonate polyol is produced, (ii) at least one component K is added to the obtained reaction mixture containing the polyether carbonate polyol, wherein component K is selected from at least one compound from the group that contains a phosphoric acid, complex mono-, di- or trialkyl esters of phosphoric acid, phosphoric acid, complex mono-, di- or trialkyl esters of phosphoric acid and (NH₄)₂HPO₄. Mixture for preparing polyurethane soft foam materials, comprising a polyether carbonate polyol and component K, is also described, wherein the said K component is selected from at least one compound from the group that contains a phosphoric acid, complex mono-, di- or trialkyl esters of phosphoric acid, phosphoric acid, complex mono-, di- or trialkyl esters of phosphoric acid and (NH₄)₂HPO₄.

EFFECT: preparation of the product having a low content of dioxanes after thermal exposure.

13 cl, 5 tbl, 35 ex