Patent ID: 9273183
Filing Date: 2016-03-01
CPC Classification: C08G

Claim Text:
1. A process for the preparation of a polyether carbonate polyol by addition of alkylene oxide and carbon dioxide to one or more H-functional starter substance in the presence of a double metal cyanide catalyst, comprising (α) placing a suspending agent that does not contain H-functional groups and is selected from one or more compound from the group consisting of aliphatic lactones, aromatic lactones, lactides, cyclic carbonates having at least three optionally substituted methylene groups between the oxygen atoms of the carbonate group, aliphatic cyclic anhydrides and aromatic cyclic anhydrides in a reactor, and (γ) metering into the reactor one or more H-functional starter substance, one or more alkylene oxide and optionally carbon dioxide simultaneously or sequentially, wherein the one or more H-functional starter substance is metered into the reactor continuously during the reaction.