Abstract: An aqueous coating composition comprising a dispersion in an aqueous medium of (i) an acrylic addition polymer, (ii) an acrylic addition polymer having an acid value lower than that of polymer (i), and (iii) a base. The composition may also comprise a cross-linker, such as a polyisocyanate or a melamine resin. Also disclosed are methods for making such aqueous coating compositions and aqueous coating compositions made by such methods.

Abstract: There is disclosed a three component coating composition comprising: (i) a first component containing at least one acrylic polyol having a carboxyl group content of 0.035 to 2.0 moles/kg, said acrylic polymer being dissolved in volatile organic solvent, (ii) a second component containing a polyisocyanate, and (iii) a third component containing water, at least one of said components also including a base, the base being present in an amount capable of neutralising 0.035 to 0.2 moles of carboxyl groups per kilogram of polyol, the composition being essentially free from other hydrophilizing groups or components. There is also disclosed a method of preparing a coating composition, which comprises mixing the first component, second component and third component shortly before application.