SOLVENT FREE LIQUID MOISTURE CURABLE POLYURETHANE COMPOSITIONS WITH LONG OPEN TIMES AND FAST CURE RATES

摘要

Disclosed is a liquid, solvent free, moisture curable polyurethane adhesivecomposition comprising the reaction productsof at least one polyoxypropylene polyol having a hydroxyl functionality of atleast three and ethylene oxide end-capping with one ormore polyisocyanates having a weight average isocyanate functionality ofgreater than 2.3. The adhesive composition has a long opentime and rapid cure time compared to currently available adhesives. Thepolyoxypropylene polyol preferably has a number averagemolecular weight of from 3,000 to 8,000. The composition finds special use inpanel lamination applications.