Patent ID: 6544596
Filing Date: 2003-04-08
Classification: B05D,C08G,C09D,Y10T

Abstract:
A method of forming a coating on at least a portion of a substrate by:a) first mixing a thermosetting basecoat composition with an isocyanate hardener to form a thermosetting mixture, the thermosetting basecoat composition comprising, in weight percent based on final formulation: between 10 and 90% of a petroleum asphalt; between 10 and 90% of a hydroxy-terminated homopolymer; between 0.1 and 30% of an epoxy-functional reactive diluent for reducing the viscosity of the composition; up to 5% of a surfactant for improving surface imperfections; up to 5% of an anti-oxidant agent; and up to 25% of a thickening agent; b) applying the thermosetting mixture as a liquid to at least a portion of a substrate and allowing the thermosetting mixture to chemically crosslink to form a basecoat; c) applying a topcoat thermoplastic composition onto the basecoat to a given thickness to form the coating on the portion of the substrate, the topcoat thermoplastic composition comprising, in weight percent, based on final formulation: between 10 and 90% of a modified ethylene terpolymer; between 5 and 95% of a polyethylene/methacrylic acid copolymer; between 5 and 95% of a polyethylene/methacrylic acid copolymer ionomer; up to 50% of a coloring pigment; up to 5% of an anti-oxidant; up to 5% of an ultraviolet stabilizer; up to 5% of a surfactant for improving surface imperfections; and up to 25% of a thickening agent.