Process to reduce propenyl polyethers in hydroxyfunctional polye

Details Process to reduce propenyl polyethers in hydroxyfunctional polye Process to reduce propenyl polyethers in hydroxyfunctional polye

1990-07-13

1992-03-10

Anderson, Harold D.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

25218227, 252351, C08K 506

Patent

active

050950614

ABSTRACT:
A process for reducing the amount of propenyl polyethers in hydroxy-functional polyethers comprising (1) contacting a neutral hydroxy-functional polyether, containing a propenyl polyether and water, and an acid catalyst soluble in the hydroxy-functional polyether under reaction conditions sufficient to convert at least a portion of the propenyl polyether to propionaldehyde; (2) contacting the product of step (1) and an epoxy compound to substantially scavenge the acid catalyst; and (3) stripping the product of step (2) to substantially remove the epoxy compound the the propionaldehyde.
The resulting hydroxy-functional polyethers contain reduced amounts of propenyl polyethers and can therefore be used to prepare polyurethane foams having a reduced tendency to discoloration.

REFERENCES:
patent: 4129718 (1978-12-01), Muzzio
patent: 4507475 (1985-03-01), Straehle et al.

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