RESIN COMPOSITION, ANTI-REFLECTION COATING MATERIAL, ANTI-DAZZLING COATING MATERIAL, ANTI-REFLECTION COATING, ANTI-REFLECTION FILM, ANTI-DAZZLING FILM, CORROSION PROTECTIVE COATING, CORROSION PROTECTIVE COATING MATERIAL, COATING MATERIAL, AND COATING

摘要

In a corrosion protective coating and a corrosion protective coating material, insulating properties of empty particles in a cubic form formed of a silica shell having an outer diameter in the range of 10 nm to 300 nm are utilized to avoid the penetration of water into closed cells and to realize excellent corrosion resistance even when the thickness of the coating film is reduced to not more than 20 µm. In a corrosion protective coating test specimen (1), an oxide film present on the surface of an aluminum plate (2) having a length of 150 mm, a width of 70 mm, and a thickness of 5 mm is removed by sand blasting. A corrosion protective coating material comprising empty particles (4) in a cubic form formed of a silica shell having an average particle diameter of 80 nm and having an outer diameter in the range of 50 nm to 100 nm, and zinc powder particles (5) homogeneously dispersed in an isocyanate-acrylic coating material is spray coated onto the aluminum plate (2), and the coating is then baked and dried to homogeneously disperse the empty particles (4) and the zinc powder particles (5) in a coating film (6) and thus to form a corrosion protective coating (3). The specific permittivity of the corrosion protective coating (3) is satisfactorily low and 2.5, and, in a CASS test, the corrosion protective coating test specimen (1) does not cause any abnormal phenomenon even when 240 hr has elapsed.