Potassium catalyst system for preparing polyurethane based plywood-patch compositions
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United States of America Patent
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Feb 13, 1990
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N/A
app pub date -
Dec 1, 1988
filing date -
Dec 1, 1988
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Expired
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Abstract
A plywood-patching composition is provided based on a noncellular polyurethane elastomer prepared by reacting a polyether or polyester polyol with a polyisocyanate in the presence of a catalytic amount of a substantially anhydrous potassium salt of a carboxylic acid having from 2 to about 20 carbon atoms, and process for preparing same. The catalysts utilized are relatively non-toxic, yet they promote rapid polymerization with essentially no foaming for a wide variety of non-cellular polyurethane elastomeric applications, particularly in plywood-patch applications where even small amounts of foaming is deleterious to the properties thereof.
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