Polyols, use and method of preparation
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United States of America Patent
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Jul 24, 1990
Grant Date -
N/A
app pub date -
Nov 1, 1988
filing date -
Nov 1, 1988
priority date (Note) -
Expired
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Abstract
Alkoxylated polyols are prepared by dispersing a nitrogen-containing material, such as urea, into a dispersing media comprised of a polyether or polyester polyol and a chemical moiety capable of being alkoxylated, such as a carbohydrate, i.e. whey permeate or sucrose, lactose, etc., and reacting the resultant dispersion with a C.sub.2 -C.sub.6 epoxide to form an alkoxylated polyol having a hydroxyl number below about 600. In certain embodiments, up to about 25% by weight of a urea material can be incorporated within the alkoxylated polyol for improved flame retardancy in the polyurethane/polyisocyanate/polyisocyanurate foams produced therefrom.
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