Double-metal cyanide catalysts for preparing polyether polyols

Details Double-metal cyanide catalysts for preparing polyether polyols Double-metal cyanide catalysts for preparing polyether polyols

C - Chemistry, Metallurgy

08

F

C08F 4/54 (2006.01) B01J 27/26 (2006.01) B01J 31/22 (2006.01) C08F 16/02 (2006.01) C08F 16/04 (2006.01) C08F 16/12 (2006.01) C08G 65/00 (2006.01) C08G 65/26 (2006.01) C08G 67/00 (2006.01) B01J 31/16 (2006.01)

Patent

CA 2427881

The invention relates to double-metal cyanide catalysts for preparing polyols by the polyaddition of alkylene oxides on to starter compounds containing active hydrogen atoms, wherein the DMC catalysts are composed of: a) at least one double-metal cyanide compound; b) at least one organic complexing ligand; and, optionally, c) at least one functionalized polymer, wherein the organic complexing ligand is a mixture of a C3-C7 aliphatic alcohol and from about 2 to about 98 mole %, based on the total amount of organic complexing ligand, of a cyclic, aliphatic, cycloaliphatic or aromatic ketone. The DMC catalysts of the present invention have increased activity compared to known catalysts. Additionally, the DMC catalysts of the present invention can be used to prepare polyols with reduced high molecular weight components.

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