VERFAHREN ZUR HERSTELLUNG LAGERSTABILER POLYURETHAN-EINKOMPONENTENLACKE

摘要

Single-component polyurethane varnishes having long shelf life containing conventional solvents and the reaction product of 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate (IPDI) and branched polyesters containing terminal hydroxyl groups. The polyesters contain intermolecular tin and are based on mixtures of aliphatic and aromatic dicarboxylic acids, 15 to 85 mole percent of the acids being aliphatic, the balance aromatic. The polyester and IPDI are reacted without catalysts at temperatures of 10 DEG to 35 DEG C and in such quantities that there are two isocyanate group for each -OH group.