POLYURETHANE TWO-COMPONENT LACQUERS

摘要

Polyurethane two-component lacquers are disclosed which have high activity for coating various substrates, the lacquers comprising(1) a lacquer solvent, (2) the reaction product of 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl-isocyanate with branched chain polyesters having terminal hydroxyl groups and being obtained from mixtures of aliphatic and aromatic dicarboxylic acids, 15-85 mol % of the dicarboxylic acids being aliphatic with the remainder aromatic acids, wherein the polyester and isocyanate are reacted in quantities so that there are two isocyanate groups per OH group, the reaction being carried out in the absence of catalytic additives at 10 - 35.degree.C and (3) an aldimine of the general formula; wherein R denotes the same or different alkyl groups.