C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 41/44 (2006.01) C07C 43/13 (2006.01) C07H 15/08 (2006.01) C08G 65/30 (2006.01) C08G 65/32 (2006.01)
Patent
CA 2046945
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 and 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.
Chavez Johnny Jr.
Gerstle Richard N.
Kent Van A.
Mcclure Craig A.
Plepys Raymond A.
Smart & Biggar
The Dow Chemical Company
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