MOISTURE-CURING, STORAGE STABLE, SINGLE-COMPONENT POLYURETHANE SYSTEMS

摘要

The object of this invention is a moisture-curing, storage stable, single-component polyurethane system comprising: A. a polyurethane prepolymer with a free isocyanate content of 1 to 5 percent by weight; B. a dialdimine having the formula R¢-N=CH-C(CH3)2-CH2-O-CO-CH-(CH3)2!2 in which R is a divalent aliphatic radical with 2 to 10 carbon atoms, aliphatic radical having 4 to 10 carbon atoms and containing ether oxygen and/or lower alkylamino nitrogen atoms, cycloaliphatic radical with 6 to 15 carbon atoms or aromatic radical with 6 to 21 carbon atoms; and C. an acid catalyst selected from the group consisting of aliphatic carboxylic acids, aromatic carboxylic acids, toluenesulfonic acid, and mixtures thereof. The polyurethane systems are used as coating, sealing, casting, spackling and bonding materials.