STABLE POLYISOCYANATE PREPOLYMERS WITH HYDROXYL FUNCTIONS, PROCESS FOR THEIR MANUFACTURE AND THEIR APPLICATION TO THE MANUFACTURE OF SOFT FOAMS OF POLYURETHANES WITH IMPROVED IMPORTS

摘要

HYDROXYLATED PREPOLYMERS COMPRISING POLYADDITION PRODUCTS OF A POLYISOCYANATE WITH AN ALKYLENE OXIDE CONDENSING PRODUCT ON AN AMINE IN THE PRESENCE OF A POLYOL CONTAINING NO PRIMARY HYDROXY FUNCTIONS. / P P THEY ARE PREPARED BY MIXING THE COMPONENTS AT A TEMPERATURE OF 10C TO 150C. / P P THESE PREPOLYMERS ARE ESPECIALLY STABLE AND ARE RECOMMENDED FOR THE MANUFACTURE OF IMPROVED PORT OF POLYURETHANE FOAMS. / P