| 摘要 |
PURPOSE:To obtain the titled composition having excellent long-term weather resistance and corrosion resistance and suitable for the coating of a metallic substrate, by compounding an organotin compound to a polyol component consisting of a fluorine-containing copolymer having hydroxyl group and a curing agent component consisting of a polyvalent isocyanate, etc. CONSTITUTION:The objective coating composition can be produced by compounding (A) an organotin compound (e.g. dibutyltin dilaurate) to a coating composition composed mainly of (B) a polyol component comprising a fluorine- containing copolymer having hydroxyl group [preferably a copolymer composed of 30-70wt.% of a fluoroolefin, 5-60wt.% of cyclohexyl vinyl ether, 3-50wt.% of an alkyl vinyl ether, 3-25wt.% of a hydroxyalkyl vinyl ether and 0-40wt.% of other copolymers] and (C) a curing agent component composed of a polyvalent isocyanate compound (e.g. hexamethylene diisocyanate) or an aminoplast compound. The amount of the component A is preferably 0.1-5pts.wt. based on 100pts.wt. of the solid content of the components A+B.
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