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AssigneeBayer Polymers LLC
InventorsNathan L. Anderson, Karl W. Haider, Keith J. Headley, Kerry A. Ingold, Herman P. Doerge
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Clear, amine-initiated polyether polyols are made by epoxidizing an amine in the presence of an alkali metal hydroxide catalyst. By reducing the amount of catalyst used during the polyol synthesis and by adding the catalyst after between 5 and 30% of the total amount of at least one alkylene oxide has been added, after lactic acid neutralization, gives a short chain polyol that has foam processing characteristics similar to the conventional sulfuric acid neutralized polyol. The polyols produced in this manner are particularly useful for the production of polyurethane and polyisocyanurate foams.
A process for the production of short chain polyols comprising contacting an amine with at least one alkylene oxide, wherein the amount of alkylene oxide contacted with the amine is between 5 and 30% of the total amount of alkylene oxide to be added to the amine, adding from about 0.001 to 0.1 wt. % based on the weight of the finished polyol of an alkali metal hydroxide catalyst, contacting the amine with the remaining amount of alkylene oxide and, upon completion of the epoxidation, adding a hydroxy carboxylic acid to the epoxidized mixture.
Dependencies are inferred from the claim text.