| 摘要 |
PROBLEM TO BE SOLVED: To provide an urethane resin coating composition high in visibility of a substrate over long time, capable of forming a coated film excellent in durability and small in environmental load.SOLUTION: There is provided an urethane resin coating composition having percentage of a coated film forming component in the coating composition of 70 mass% or more and containing polyol having number average molecular weight of 300 to 10,000 and the number of hydroxyl groups per a molecule of 2.3 to 9.0, and polyisocyanate having percentage of isocyanate groups of 10.0 to 20.0 mass%, where the polyisocyanate has 0.5 to 1.5 equivalent of isocyanate groups to the hydroxyl group of the polyol, percentage of a loading pigment in the coated film forming component is 0 to 10.0 mass% and visible light transmittance of the coated film is 30% or more when a coated film having film thickness of 300 μm is formed from the urethane resin coating composition under atmosphere at a temperature of 35°C and relative humidity of 90%.SELECTED DRAWING: None |
