Improved double metal cyanide catalysts for producing...

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B01J 27/26 (2006.01) B01J 31/06 (2006.01) C08G 65/10 (2006.01) C08G 65/26 (2006.01)

Patent

CA 2322823

The invention relates to new, improved double metal cyanide (DMC) catalysts for preparing polyetherpolyols by polyaddition of alkylene oxides to starter compounds containing active hydrogen atoms, wherein the catalyst contains a double metal cyanide compound, an organic coordination ligand and 5 to 80 wt.%, with respect to the amount of catalyst, of an ethylene oxide polyether with a number average molecular weight greater than 500. The new, improved catalysts have a greatly increased reactivity for polyetherpolyol preparation.

L'invention concerne de nouveaux catalyseurs cyanurés dimétalliques perfectionnés pour la préparation de polyols de polyéther par polyaddition d'oxydes d'alkylène sur des composés initiateurs présentant des atomes d'hydrogène actifs. Le catalyseur renferme un composé cyanuré dimétallique, un ligand complexe organique et 5 à 80 % en poids, par rapport à la quantité du catalyseur, d'un polyéther d'oxyde d'éthylène présentant une masse moléculaire moyenne en nombre supérieure à 500. Ces nouveaux catalyseurs perfectionnés possèdent une activité fortement accrue pour la préparation de polyols de polyéther.

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