IMPROVED DOUBLE-METAL CYANIDE CATALYSTS FOR THE PRODUCTION OF POLYETHER POLYOLS

摘要

The invention relates to novel, improved double metal cyanide (DMC) catalyst s for the preparation of polyetherpolyols by the polyaddition of alkylene oxides onto starter compounds containing active hydrogen atoms, the catalyst containing a double metal cyanide compound, an organic complexing ligand and 2 - 80 wt.% of a polycarbonate, based on the amount of catalyst. The novel, improved catalysts have markedly shortened induction times and simultaneously a greatly increased activity in the preparation of polyetherpolyols.