Method for treating polypropylene ether and poly-1,2-...

Details Method for treating polypropylene ether and poly-1,2-... Method for treating polypropylene ether and poly-1,2-...

C - Chemistry, Metallurgy

07

C

260/641, 260/632

C07C 43/10 (2006.01) C08G 18/48 (2006.01) C08G 65/26 (2006.01) C08G 65/30 (2006.01)

Patent

CA 1155871

Abstract of the Disclosure Polyetherpolyols containing residues of catalysts of the double metal cyanide complex class are created with a strong base and ion exchanged or neutralized and filtered to provide a stable polyol with reduced tendency to form allophanates with diisocyanates. Further, the addition of ethylene oxide to the polyol white in contact with the strong base serves to end cap the polyol to provide it with primary hydroxyl groups.

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