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US 6,608,231 B1Granted
Double-metal cyanide catalysts for producing polyether polyols
AssigneeBayer Aktiengesellschaft
InventorsPieter Ooms, Jörg Hofmann, Pramod Gupta
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Abstract
The invention relates to novel double metal cyanide (DMC) catalysts for the preparation of polyether polyols by polyaddition of alkylene oxides to starter compounds containing active hydrogen atoms, wherein the catalyst contains a) double metal cyanide compounds, b) organic complex ligands other than c), and c) carboxylic acid ester of polyhydric alcohols. The catalysts according to the invention have greatly increased activity in the preparation of polyether polyols.
Claims15
A double-metal cyanide catalyst comprising:
- a) at least one double-metal cyanide compound;
- b) at least one organic complex ligand which is not an ester of 1,2,3-propanetriol, 1,1,1-trimethylolpropane, pentaerythritol, maltose or sorbitan with C2-C18-alkylcarboxylic acids;
- and
- c) at least one ester of 1,2,3-propanetriol, 1,1,1-trimethylolpropane, pentaerythritol, maltose or sorbitan with C2-C18-alkylcarboxylic acids.
1 more element
Dependencies are inferred from the claim text.