Abstract: This invention provides a process to form a coated film characterized in that, after a cationically electrodeposition paint is applied on a metal-made article to be coated and is heat-cured, the surface of the resulting electrodeposition coated film is coated with an aqueous primer, which is mainly composed of such a thermoplastic polyurethane resin as is produced by subjecting a carboxyl group-containing urethane prepolymer to chain extension in the presence of an aqueous medium, and, successively, with an aqueous base paint, and, next, with a clear paint, and that the resulting three-layer coated films are heated and are thereby cured simultaneously. By this process, there can be formed a multi-layer coated film excellent in chipping-resistance, corrosion-resistance, weatherability and physical performances.

Abstract: In the process of coating a molded article of an olefinic resin, a finishing coating layer is formed on the surface of the molded article of an olefinic resin prepared by mixing a resin composition containing (E) polypropylene and (F) an ethylene-.alpha.-olefin copolymer with (G) a modified polyolefin in which a specific group is introduced, (H) stearic acid monoglyceride or stearyl diethanolamine, and (I) an inorganic filler, with a coating material prepared by mixing the main material containing a copolymer obtained by copolymerization of (A) a chlorinated polyolefin, (B) an acrylic monomer having hydroxyl group, and (C) a polyester prepolymer as the main component thereof with (D) a multi-functional polyisocyanate compound as the curing agent in a single coating process without pretreatment of the surface of the molded article using an organic solvent containing a halogen and without coating the surface of the molded article with a primer as undercoat.

Abstract: The present invention provides a process for painting a polyolefinic resin component comprising washing the surface of the polyolefinic resin component, directly coating at least one time the surface with the following paint, and forming topcoat on the surface, the paint being a mixture of a main component containing principally a polymer resin having a hydroxyl number of 20-150, which is obtained by polymerizing (A) Chlorinated polyolefin, (B) Acrylic monomer and (C) Polyester prepolymer and a curing agent of (D) polyfunctional isocyanate compound.

Abstract: In a metal material having a surface adapted to slide on a surface having a nickel-silicon carbide composite electroplated layer and subjected to a treatment for causing silicon carbide particles to project outward beyond the surface, the surface of the metal material is provided with porous hard chrome plating, whereby a lubricant may be deposited and retained in the porous plated layer.