| abstract |
[PROBLEMS] To provide a coating composition for a precoated steel sheet not only having excellent chemical resistance, coating film hardness, stain resistance against raindrop contamination, workability, and coating film appearance, but also excellent storage stability and coating workability. To provide a method for finishing by painting, and a coated article thereof. A resin containing a hydroxyl group having a hydroxyl value of 5 to 200 mg / g and a number average molecular weight of 500 to 20,000, and (B) an amino resin curing agent that reacts with the resin (A). And (C) general formula: (R 1 ) m -Si- (OR 2 ) n (wherein R 1 is a phenyl group or an alkyl group having 1 to 18 carbon atoms, and R 2 has 1 to 1 carbon atoms. 6 is an alkyl group, m is an integer of 0 to 1, n is an integer of 3 to 4, and m + n is 4.), a condensate thereof, or a condensate thereof A thermosetting resin composition comprising a partial hydrolyzate and (D) an epoxy group-blocked sulfonic acid as essential components. [Selection figure] None |