Double metal cyanide (DMC) catalysts with crown ethers, process to produce them and applications

摘要

The double metal cyanide (DMC) catalyst comprises (1) one or more double metal cyanides; (2) one or more organic ligands; (3) water; and (4) one or more crown ether ligands, with the condition that the organic ligand (2) is not a crown ether ligand (4). Said DMC catalysts are useful for the production of polyether polyols by a process that comprises the addition of an alkylene oxide to an initiator with active hydrogens, in the presence of said DMC catalyst.