A method of forming a polyethercarbonate polyol using a multimetal cyanide
compound is disclosed. The method includes providing a multimetal cyanide
compound having a crystalline structure and a content of platelet-shaped
particles of at least 30% by weight, based on the weight of the multimetal
cyanide compound and further including at least two of the following
components: an organic complexing agent, water, a polyether, and a
surface-active substance. Then an alcohol initiator is reacted with at
least one alkylene oxide and carbon dioxide under a positive pressure in
the presence of the multimetal cyanide compound, thereby forming the
polyethercarbonate polyol.
