Process for the preparation of a coating agent.

摘要

A process for preparing a coating composition which contains moisture-curable organic polyisocyanates as binder together with the usual auxiliaries and additives by mixing at least the water-containing auxiliaries and additives with an isocyanato-containing reaction product a) of … …  a1) a polyisocyanate mixture of the diphenylmethane series and …  a2) a stoichiometrically deficient amount of an alkanol with or without ether linkages, terminating the spontaneous isocyanate/water reaction and mixing the resulting mixture with an isocyanato- containing reaction product b) of …  b1) a polyisocyanate component comprising at least one aromatic polyisocyanate and …  b2) a stoichiometrically deficient amount of a polyhydroxy component comprising at least one polyol of molecular weight 500 to 10,000 which contains ether and/or ester and/or thioether and/or carbonate groups, optionally in admixture with up to 40% by weight, based on the total weight of component b2) of at least one 2- to 6-hydric alcohol of molecular weight 62-499. …