Patent ID: 6617048
Filing Date: 2003-09-09
Classification: B05D,C08L,C09D,Y10T

Abstract:
A one-coat-prepainted steel sheet comprising:a chemically conversion-treated zinc-plated steel sheet; a one-coat coating having a dried film thickness of not more than 10 &mgr;m, the one-coat coating being formed on a surface of said zinc-plated steel sheet; said one-coat coating being formed by one-coat-painting and baking of an organic solvent paint composition, the an organic solvent paint composition containing a polyester resin (A) and a melamine resin (D) as main components, the melamine resin (D) being in an amount of 5 to 30 parts by weight relative to 100 parts by weight of the polyester resin (A); said polyester resin (A) having a number-average molecular weight of 5000-25000, a glass transition temperature of 20-80Â° C., a hydroxyl value of 3-30 KOH mg/g and an acid value of 0-10 KOH mg/g; and said polyester resin (A) having polyalcohol components, 20-70 mol % of the polyalcohol components being cyclohexanedimethanol.