Coating compositions containing polyisocyanates and aldimines which have improved storage stability

摘要

The present invention relates to a coating composition having an improved pot life without a corresponding increase in dry time when cured under ambient conditions which contains a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde corresponding to the formula: O=CHCH(R1)(R2) wherein R1 and R2 may be the same or different and represent optionally substituted hydrocarbon radicals, or R1 and R2 together with the beta -carbon atom form a cycloaliphatic or heterocyclic ring and c) 0.1 to 15 weight percent, based on the total weight of the coating composition, of a water-adsorbing zeolite, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.5:1 to 20:1.