Method for treating polypropylene ether and poly-1,2-butylene et

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

1981-09-25

1982-10-19

Mars, Howard T.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568608, 568609, 568621, 568623, 568624, 568625, 536120, C07C 4103

Patent

active

043551882

ABSTRACT:
Polyetherpolyols containing residues of catalysts of the double metal cyanide complex class are treated 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 while in contact with the strong base serves to end cap the polyol to provide it with primary hydroxyl groups.

REFERENCES:
patent: 3299151 (1967-01-01), Wismer et al.
patent: 3427256 (1969-02-01), Milgron
patent: 3427334 (1969-02-01), Belner
patent: 3427335 (1969-02-01), Herold
patent: 3803246 (1974-04-01), Rosenzweig et al.
patent: 3941849 (1976-03-01), Herold
patent: 4029879 (1977-06-01), Muzzio
patent: 4122035 (1978-10-01), Cislo
patent: 4137398 (1979-01-01), Muzzio

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