Patent ID: 8241742

Claim:
A coated steel sheet coated with a composite coat, wherein said composite coat comprises a compounded resin (A) in which polyurethane resin particles (A-1), ethylene-unsaturated carboxylic acid copolymerization resin particles (A-2), silicon oxide particles (A-3) having an average particle diameter of 5 to 20 nm and an organic titanium compound (A-4) are compounded, wherein the polyurethane resin particles (A-1) and ethylene-unsaturated carboxylic acid copolymerization resin particles (A-2) have an average particle diameter of 20 to 100 nm, are used in a mass ratio of 20:80 to 90:10 with respect to each other, and both contain a silanol group and/or an alkoxysilyl group; polyolefin wax particles (B) having an average particle diameter of 0.5 to 4 μm and a softening point of 100 to 140° C.; and silicon oxide particles (B) having an average particle diameter of 70 to 200 nm, and wherein an amount of a coat of said composite coat is 0.5 to 3 g/m 2 .