Process for preparing polyether polyols
OwnerThomas Ostrowski, Raimund Ruppel +1inventors
InventorsThomas Ostrowski, Raimund Ruppel, Eva Baum
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Abstract
A process for preparing polyether polyols comprises A) preparing a polyether polyol precursor, B) preparing a suspension of a DMC catalyst in a polyol, C) activating the DMC catalyst by bringing it into contact with an alkylene oxide, giving an activated DMC catalyst suspension, D) adding the activated DMC catalyst suspension from step C) to the polyether polyol precursor, E) reacting the polyether polyol precursor with alkylene oxide and, if appropriate, an H-functional starter substance in the presence of the activated DMC catalyst.
Claims10
A process for preparing polyether polyols, which comprises
- A) preparing a polyether polyol precursor,
- B) preparing a suspension of a DMC catalyst in a polyol,
- C) activating the DMC catalyst by bringing it into contact with an alkylene oxide, giving an activated DMC catalyst suspension,
- D) adding the activated DMC catalyst suspension from step C) to the polyether polyol precursor,
- E) reacting the polyether polyol precursor with alkylene oxide and, if appropriate, an H-functional starter substance in the presence of the activated DMC catalyst.
Dependencies are inferred from the claim text.