Patent ID: 6565979
Filing Date: 2003-05-20
Classification: C09D,Y10T

Abstract:
A process for coating an optionally precoated substrate with a two-layer coating comprising:applying an aqueous base lacquer composition to said substrate by spray application; and applying a clear lacquer layer over said aqueous base lacquer composition; wherein said aqueous base lacquer composition is comprising at least one polymer selected from the group consisting of linear polyethylene oxide homopolymers, branched polyethylene oxide homopolymers, linear polypropylene oxide homopolymers, branched polypropylene oxide homopolymers, linear polyethylene/polypropylene oxide copolymers with randomly distributed ethylene oxide and propylene oxide units, branched polyethylene/polypropylene oxide copolymers with randomly distributed ethylene oxide and propylene oxide units, wherein said polymers have terminal hydroxyl groups and optionally are partly or completely etherified with C1-C4-alkanols; wherein said polymers have an average molecular weight from more than 1,000 to 8,000; further wherein said aqueous base lacquer composition has a solids content comprising 0.5-15% of said polymers; whereby said clear lacquer achieves a reduced wetting limit.