BINARY METAL CYANIDE CATALYSTS SUITABLE FOR MANUFACTURE OF POLYOLS AND RELATED PRODUCTION TECHNOLOGY

摘要

The present invention is directed to double metal cyanide catalysts (“DMC”) which can be used to prepare polyols. DMC catalysts of the present invention are prepared by combining i) at least one metal sa ii) at least one metal cyanide sa iii) at least one organic complexing ligand; iv) at least one alkaline metal sa and, optionally, v) at least one functionalized polymer. The present invention is also directed to a process for preparing a polyol in the presence of a DMC catalyst prepared according to the process of the present invention.;Surprisingly, DMC catalysts of the present invention, which are preferably prepared with at least one alkaline metal halide, have acceptable activity and can be used to catalyze oxyalkylation reactions. Additionally, DMC catalysts produced by the process of the present invention can be used to prepare polyols which have reduced levels of high weight tail.