Aqueous coating agent and aqueous emulsion, process for the preparation thereof

Abstract

An aqueous coating agent on the basis of one or more polyols having ionic groups or groups convertible into ionic groups, which can contain pigments, fillers and/or optional conventional lacquer adjuvants and/or solvents, comprising A) 10 to 40 wt.-% of one or more polyols having a number-average molecular weight (Mn) of 500 to 200000, an OH-number of 15 to 300 and a content of ionic groups and/or groups convertible into ionic groups of 5 to 400 meq/100 g solid resin, which are at least partly neutralized, B) 0.5 to 10 wt.-% of one or more chlorinated polyolefines having a chlorine content of 15 to 35 wt.-%, C) 5 to 40 wt.-% of one or more aromatic solvents having a boiling range from 100.degree. to 160.degree. C., D) 25 to 75 wt.-% of water, E) 0 to 30 wt.-% of one or more further water dilutable binders which are free from groups reactive with NCO, the percentages by weight of components A) to E) adding up to 100 wt.-% and F) one or more polyisocyanates having on average at least two free isocyanate groups per molecule, in such an amount that the ratio of the number of reactive isocyanate groups to the OH-groups of the polyols is 0.5:1 to 5:1, the coating agent being a two-component system, one component containing the polyols and the other component containing the polyisocyanates.

Dependencies are inferred from the claim text.