Catalysts of dual-metal cyanide containing two-fold complex agents

摘要

Invention patent: b "double metal cyanide catalysts containing complexing agents bidentados cu00ecclicos' ' d .They are revealed double metal cyanide catalysts (DMC) and methods to produce them.The catalysts consist of a composite of DMC, an organic complexing agent, and optionally a functionalised polymer.The key component is the complexing agent, which consists of a C ~ 3 ~ C ~ 5 ~ aliphatic alcohol and a compound selected from lactams and bidentado cyclic lactones.The polyether polyols made from the catalysts contain reduced levels of high molecular weight components (Mn greater than 400.000) and show a consistently better performance in uretana applications such as molded foams and flexible.