Double metal cyanide catalysts containing polyester for...

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B - Operations, Transporting

01

J

402/268, 252/62

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

Patent

CA 2306386

The invention relates to new improved double-metal cyanide (DMC) catalysts for the preparation of polyether-polyols by polyaddition of alkylene oxides on to starter compounds containing active hydrogen atoms, the catalyst comprising a double-metal cyanide compound, an organic complexing ligand and 5 - 80 wt.%, based on the amount of catalyst, of a polyester. For the preparation of polyether-polyols, the new improved catalysts have significantly shortened induction times and at the same time a greatly increased activity.

L'invention concerne de nouveaux catalyseurs améliorés de cyanure de métaux composites pour préparer des polyols de polyéther par polyaddition d'oxydes d'alkylène sur des composés de démarrage présentant des atomes d'hydrogène actifs. Le catalyseur contient un composé cyanure de métaux composites, un ligand complexe organique et entre 5 et 80 % en poids de polyester, par rapport à la quantité de catalyseur. Ces nouveaux catalyseurs améliorés présentent pour la préparation de polyols de polyéther, des temps d'induction nettement plus courts et simultanément une activité fortement augmentée.

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