| 摘要 |
PURPOSE:To obtain a coating composition of high processability, weatherability and solvent resistance for use in precoat metal, by incorporating chief ingredient consisting of specific linear polyol resin with curing ingredient consisting of blocked isocyanate resin inspecific proportions. CONSTITUTION:The objective composition can be obtained by incorporating (A) chief ingredient consisting of a linear polyol resin with a hydroxyl value 5-100 and weight-average molecular weight a hydroxyl value 5-100 and weight-average molecular weight >=20,000 (e.g. polyester-, acrylic-, silicon- or fluorine-based resin) with (B) curing ingredient consisting of a blocked polyisocyanate resin with a weight-average molecular weight >=1,000 in such an equivalent ratio of the isocyanate group in the component (B) to the hydroxyl group in the component (A) (NCO/OH) as to be 0.1-1.0/1.0.
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