Aqueous emulsions of oils and/or preferably masked (poly)isocyanate resins, and resulting emulsions
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United States of America Patent
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app pub date -
Apr 15, 2004
filing date -
Mar 31, 1993
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Abandoned
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Abstract
Aqueous emulsions of oils, gums or preferably masked (poly)isocyanate resins are prepared by kneading a mixture containing (1) a preferably masked (poly)isocyanate phase (A) with a viscosity of at least 3 Pa.s or a consistency of at least 200, and (2) an aqueous phase including water, at least one surfactant (B) and optionally at least one water-soluble thickening polymer (C). The relative amounts of water (B) and optionally (C) being such that the aqueous phase has a viscosity or consistency preferably no lower than that of the preferably masked (poly)isocyanate phase (A). The kneading is performed for a sufficient time and with sufficient shear to give an oil-in-water emulsion with a particle size of 0.1-5 .mu.m, and optionally diluting the medium with water.
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