Aliphatic polyurethane sprayable coating compositions and method of preparation
AssigneeUrylon Development, Inc.
InventorStuart B. Smith
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Abstract
An aliphatic, isocyanate-base, polyurethane polymer and a process for preparing the polymer. The process comprises reacting, such as by spraying onto a substrate or an open mold, a caprolactone polyol with an aliphatic isocyanate in the presence of a catalytic amount of a metallo catalyst, and also in the presence of a fast-curing amount of a curing agent comprising an amine, particularly a triethanol amine, to provide a fast-reaction aliphatic urethane polymer which is a clear, easily color-pigmented polymer.
Claims31
A process for preparing a fast-curing urethane polymer, which process consists essentially of reacting about 100 parts by weight of an aliphatic polyisocyanate with from about 5 to 50 parts by weight of a caprolactone polyol in the presence of a catalytic amount of a metallo catalyst and in the presence of a curing amount of a polyalkanol amine sufficient to provide a reaction time of about 30 seconds or less and to provide a fast-reacting, color stable aliphatic urethane polymer.
A process for preparing a fast-reacting aliphatic urethane polymer suitable for use in a molding operation, and which process consists essentially of preparing A- and B-side compositions and spraying together the A- and B-side compositions onto a substrate, wherein the A-side composition comprises 100 parts by weight of an aliphatic trimerized or biuret diisocyanate or a monomeric aliphatic diisocyanate, and the B-side composition comprises from about 5 to 50 parts by weight of a liquid trifunctional or difunctional caprolactone polyol having a hydroxyl number ranging from about 200 to 600, and a catalytic amount of a tin and organo metallic catalyst and a curing amount of a polyethanol amine, the A- and B-side components reacting in about 15 seconds or less.
Dependencies are inferred from the claim text.