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AssigneeBASF SE
InventorsDietmar Nissen, Matthias Marx, Wolfgang Jarre, Ernst Schoen, Walter Decker
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Stable melamine-polyoxyalkylene polyether polyol dispersions are prepared by the in situ reduction of melamine particles wherein 90 percent of the melamine particles have a particle size of less than 10 microns. Stabilizers for the melamine-polyol dispersion are selected from the group consisting of (a) silicic acids and silicates, (b) salts of perfluorinated alkyl carboxylic acids having 4 to 20 carbon atoms, salts of alkyl sulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and (c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms. These dispersions are useful for the preparation of polyurethane foams.
A stable melamine-polyol dispersion consisting of
A process for the preparation of a stable melamine-polyol dispersion wherein a mixture of
In a process for the preparation of polyurethane foams by reaction of a polyoxyalkylene polyether polyol with an organic polyisocyanate, the improvement which comprises employing as the polyol component a melamine-polyol dispersion wherein the melamine is 5 to 70 percent by weight based on the total weight of melamine and polyol, wherein 90 percent of said melamine particles have a particle size of less than 10 microns.
In the composition of polyurethane foam comprising the reaction product of a polyoxyalkylene polyether polyol with an organic polyisocyanate, the improvement which comprises employing as the polyol component a melamine-polyol dispersion wherein the melamine is 5 to 70 percent by weight based on the total weight of melamine and polyol, wherein 90 percent of said melamine particles have a particle size of less than 10 microns.
Dependencies are inferred from the claim text.