Coating film and coating film formation method

摘要

A coating film comprises a binder component containing an organosilicon compound; and aggregated particles of silica based fine particles, the aggregated particles are dispersed in the binder component. The aggregated particles are protruded from a surface of the coating film to thereby form convex portions. When a shape of each of the convex portions is assumed to be a shape of a semiellipse spherical body including a long radius "a", a short radius "b" and a protrusion height "c", the convex portions include enlarged convex portions each of which satisfies the following relation: 2/3Àabc‰¥1.0×10 -12 . A number of the enlarged convex portions is 200 or less per 1 mm 2 of the surface of the coating film.