PURPOSE: To provide a water-repelling coating film containing fluororesin powder having large particle diameter and fluororesin powder having small particle diameter in a state dispersed in the coating film and exposed on the surface of the film, having excellent water-repellency and free from the lowering of the water-repellency even after the use over a long period.
CONSTITUTION: This coating film contains (A) fluororesin powder having an average particle diameter of 4.8-10μm and (B) fluororesin powder having an average particle diameter of 0.7-1.2μm in a state dispersed in the coating film and at least partly exposed on the surface of the film. The particle size distributions of the component A and the component B are preferably 3-15μm and 0.3-1.5μm, respectively. Preferably, the sum of the amounts of the component A and the component B is 15-80vol.% in terms of solid component and the amount of the component A is not smaller than that of the component B. The fluororesin constituting the components A and B is preferably a tetrafluoroethylene resin fluorinated to the terminals and having a molecular weight of 500-20,000. The binder resin to be used as a base is preferably different from the fluororesin powder.
GOTO HIROMI
KATO MASASHI
