Patent ID: 11952454
Assignee: COVESTRO LLC
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 1:
2. The process of claim 1, wherein the base polyol is continuously produced by a process comprising:
(1) introducing into the continuous base polyol reactor a mixture comprising a double metal cyanide (DMC) catalyst and an initial starter, wherein the mixture is added in an amount sufficient to initiate polyoxyalkylation of the initial starter after introduction of alkylene oxide into the base polyol reactor;
(2) introducing the alkylene oxide to the base polyol reactor;
(3) continuously introducing a continuously added starter into the continuous base polyol reactor; and
(4) continuously introducing fresh DMC catalyst and/or further DMC catalyst/starter mixture to the continuous base polyol reactor such that catalytic activity of the DMC catalyst is maintained.