Poyurea based dispersions, foams prepared therefrom, and a process for the preparation therein
AssigneeBASF SE
InventorsThirumurti Narayan, Michael G. Kinnaird
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Abstract
Stable urea group-containing dispersions are obtained in situ by reacting carbon dioxide with an amine in the presence of a continuous phase carrier. These amine/carbon dioxide condensation adducts dispersed in the carrier are employed in the formation of polyurethane foams, polyurethane elastomers and coatings, and polyurethane microcellular foams.
Claims17
A stable urea group dispersion comprised of a disperse phase and a continuous phase, the disperse phase being solids comprised of urea group-containing reaction products of carbon dioxide and an amine which is free of hydroxyl groups, and the continuous phase comprised of a carrier compound having at least two isocyanate reactive hydrogens.
A polyurethane foam comprising the reaction of a urea group dispersion, an organic polyisocyanate, a polyurethane promoting catalyst, and a blowing agent, wherein the urea group dispersion is comprised of a disperse phase and a continuous phase, the disperse phase being solids comprised of urea group-containing reaction products of carbon dioxide and an amine which is free of hydroxyl groups, and the continuous phase comprised of a carrier compound having at least two isocyanate reactive hydrogens.
A non-cellular polyurethane product comprising the reaction between a urea group dispersion, an organic polyisocyanate, and a polyurethane promoting catalyst, wherein the urea group dispersion is comprised of a disperse phase and a continuous phase, the disperse phase being solids comprised of urea group-containing reaction products of carbon dioxide and an amine which is free of hydroxyl groups, and the continuous phase comprised of a carrier compound having at least two isocyanate reactive hydrogens.
A process for preparing a urea group-containing dispersion, comprising reacting carbon dioxide with an amine which is free of hydroxyl groups in the presence of a continuous phase carrier compound having at least two isocyanate reactive hydrogens under super-atmospheric pressure and the temperature of said reaction is maintained at 50.degree. C. or above.
Dependencies are inferred from the claim text.