Process for the preparation of polyether polyols

Details Process for the preparation of polyether polyols Process for the preparation of polyether polyols

2007-11-27

2007-11-27

McClendon, Sanza L. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S088000, C526S089000, C526S092000, C526S180000, C526S209000, C526S210000, C526S233000, C526S266000, C526S273000, C526S333000, C522S028000, C522S029000, C522S038000, C522S064000, C522S081000, C522S100000, C522S178000, C522S181000

Reexamination Certificate

active

11141916

ABSTRACT:
The invention relates to a process for the preparation of polyether polyols, which process involves:(a) contacting a phosphorus containing compound having at least one hydroxyl group with alkylene oxide to obtain alkoxylated initiator,(b) contacting the alkoxylated initiator with further alkylene oxide in the presence of a double metal cyanide complex catalyst.

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