FAST DRYING POLYURETHANE COMPOSITION
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United States of America Patent
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app pub date -
Oct 31, 2008
filing date -
Nov 28, 2005
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Abstract
A fast drying polyurethane coating composition wherein the reactants comprise (a) a first component comprising one or more polyol compounds having a glass transition temperature of less than or equal to about 25° C., and preferably an Mw of 5000 or less, preferably acrylic or polyester polyols, and (b) a second component, comprising the reaction of a (poly)isocyanate oligomer having an average NCO functionality of greater than 2, for example a biuret with an NCO functionality of 3, with a compound X comprising a substrate portion comprising one or more cycloaliphatic rings, one or more heterocyclic rings, one or more aromatic rings, or a particle of a crosslinked polymer, and functional groups covalently bonded to such substrate portion, for example hydrogenated bisphenol A (HBPA).
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