Process for the preparation of polyurethane-based lacquers.

摘要

Polyurethane-based lacquers according to the invention are the reaction product of a polyisocyanate, at least one polymeric polyol having a molecular weight between 300 and 5000, at least tris-(N- beta -hydroxypropyl)-isocyanurate and/or the ethoxylated derivative thereof and optionally a diol having a molecular weight between 60 and 200. Either one-component ore two-component lacquers may be prepared. The coatings thus obtained combine a high impact resistance with a favorable hardness, corrosion resistance and substrate adhesion.