| 摘要 |
A polyurethane coating composition, sprayable onto a substrate by means of conventional spray equipment at pressures of less than about 100 psi and at temperatures of between ambient to about 50.degree.C, in one or more layers to a film thickness of up to abo ut 30 mils, comprises a resin component having hydroxyl functionality, which may be substantially free of amine functionality, an isocyanate functional curing component, an organotin catalyst, and a catalyst inhibiting amount of a volatile organic acid. The composition may optionally include a fibrous reinforcing material, and a colorant. Advantageously, the coating compositio ns of the present invention provide polyurethane films having excellent physical properties, solvent and UV resistance, and adhesion to clear coated substrates without the need for adhesion promoting primer coats or chemical pretreatments. The compositions are particular usef ul to form sprayable vehicle bedliners.
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