Tertiary amine-containing polyols prepared in a mannich condensation reaction using a mixture of alkanolamines
AssigneeThe Dow Chemical Company
InventorsJ. E. Marugg, Michael A. P. Gansow, J. A. Thoen
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Abstract
Mannich polyols of low viscosity and reduced reactivity are prepared by condensing a phenolic compound with formaldehyde and a mixture of diethanolamine and at least one other alkanol amine. The condensation product is the alkoxylated to form a polyol which is particularly useful in preparing rigid polyurethane foam.
Claims12
A polyurethane foam which is the reaction product of a reaction mixture comprising a polyisocyanate, a blowing agent and a polyol characterized in that the polyol is prepared by alkoxylating a Mannich condensate of (a) phenol or an inertly-substituted phenol, (b) formaldehyde, and (c) a mixture of (i) diethanolamine and (ii) at least one other alkanolamine, wherein the weight ratio of diethanolamine to the other alkanolamine is from about 1:19 to about 19:1.
Dependencies are inferred from the claim text.