| abstract |
The invention relates to novel double metal cyanide (DMC) catalysts for producing polyether polyols by the polyaddition of alkenyl oxides to starter compounds which have active hydrogen atoms. The catalyst contains a) double metal cyanide compounds, b) organic complex ligands which are different from c) and c) two or more complexing components from the compound classes of functionalised polymers, glycidyl ethers, glycosides, carboxylic acid esters of multivalent alcohols, bile acids or their salts, esters or amides, cyclodextrines, phosphorous compounds, .alpha.,.beta.-unsaturated carboxylic acid esters or ionic surface-active or interfacially-active compounds. The inventive catalysts have a significantly increased activity during the polyether polyol production. |