Double metal cyanide catalysts for the preparation of polyether polyols

Abstract From the Canadian patent

This invention relates to new double metal cyanide (DMC) catalysts a process , for, the preparation of these DMC catalysts and to a process for the production of polyether polyols by the polyaddition of alkylene oxides to starter compounds which, comprise active hydrogen atoms, wherein the catalyst comprises a) one or more double metal cyanide compounds, b) one or more organic complexing ligands and , c), one or more organic phosphates organic phosphites, organic phosphonates organic, phosphonites, organic phosphinates or organic phosphinites. The catalysts according, to the invention exhibit a considerably increased activity for polyether polyol, production.