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    • 10. 发明授权
    • Highly active double metal cyanide catalysts
    • 高活性双金属氰化物催化剂
    • US06018017A
    • 2000-01-25
    • US947253
    • 1997-10-08
    • Bi Le-Khac
    • Bi Le-Khac
    • C08G65/10B01J27/26C01C3/11C08G59/40C08G59/70C08G65/02C08G65/26C08G65/28C08G65/04
    • C08G65/2663B01J27/26C08G65/2642
    • Improved double metal cyanide catalysts are disclosed. The substantially amorphous catalysts of the invention are more active for polymerizing epoxides than conventional DMC catalysts, which have a substantial crystalline component. Polyol products made with the catalysts are unusually clear, have exceptionally low unsaturations, and contain no detectable amount of low molecular weight polyol impurities. Methods of making the improved DMC catalysts are also disclosed. In one method, the reactants are intimately combined to produce a catalyst of the invention. In another method, an organic complexing agent is initially present in the reactant solutions.
    • 公开了改进的双金属氰化物催化剂。 与具有大量结晶成分的常规DMC催化剂相比,本发明的基本上无定形的催化剂对聚合环氧化物更有活性。 用催化剂制成的多元醇产品异常清楚,具有非常低的不饱和度,并且不含可检测量的低分子量多元醇杂质。 还公开了制备改进的DMC催化剂的方法。 在一种方法中,将反应物紧密地组合以产生本发明的催化剂。 在另一种方法中,有机络合剂最初存在于反应物溶液中。