| abstract |
Disclosed is a novel silica-based hollow fine particle that can be suitably used for forming a transparent film excellent in antireflection performance with improved strength, scratch resistance, alkali resistance, and the like, a coating for forming a transparent film using the fine particle, and transparent The present invention relates to a coated substrate. The average particle diameter (D P ) is in the range of 25 to 200 nm, the surface has a convex portion, and the average diameter (convex P ) of the bottom surface portion of the convex portion is the average particle diameter (D P ). It is in the range of 1/40 to 1/2 (Note that the average particle diameter is determined by measuring the longest diameter (D L ) and the diameter (D S ) perpendicular to the longest diameter for any 20 particles, and determining the particle diameter. (D L ) + (D S ), and the average value thereof). Furthermore, the coating material for transparent film formation characterized by including the said silica type hollow microparticle, a matrix component, and a polar solvent. [Selection] Figure 1 |