Improved double metal cyanide complex catalysts

Details Improved double metal cyanide complex catalysts Improved double metal cyanide complex catalysts

C - Chemistry, Metallurgy

08

F

C08F 4/54 (2006.01) B01J 27/26 (2006.01) C08G 59/68 (2006.01) C08G 65/26 (2006.01) C08G 65/30 (2006.01) C08L 71/00 (2006.01)

Patent

CA 2134596

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. A method of making the improved DMC catalysts, which involves intimately combining the reactants, is also disclosed.

On présente des catalyseurs cyanurés à double métal améliorés. Les catalyseurs sensiblement amorphes de l'invention sont plus actifs pour la polymérisation d'époxydes que les catalyseurs DMC conventionnels, qui ont un composant cristallin substantiel. Les produits de polyol fabriqués avec les catalyseurs sont exceptionnellement nets, ont des insaturations exceptionnellement faibles et ne contiennent aucune quantité détectable d'impureté de polyol à faible poids moléculaire. On décrit également un procédé de fabrication des catalyseurs DMC, qui consiste à combiner étroitement les réactifs.

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