| abstract |
[PROBLEMS] To easily adjust a refractive index within a predetermined range and to include composite oxide particles having excellent dispersibility and stability, so that the refractive index of a base material and a transparent film can be set to the same level. Therefore, a substrate with a hard coat film excellent in adhesion to the substrate, scratch resistance, scratch strength, pencil hardness, etc. without causing interference fringes and a coating liquid capable of forming the hard coat film are provided. provide. SOLUTION: A substrate, a composite oxide particle formed on at least one surface of the substrate, and a hard coat film composed of a matrix component, the composite oxide particle having zirconium oxide as a core, and pentoxide Composite oxide particles having a core-shell structure with antimony and / or silica as a shell, and a refractive index difference between the refractive index (HC n ) of the hard coat film and the refractive index (S n ) of the substrate is 0.3 or less A substrate with a hard coat film, characterized in that A coating liquid for forming a hard coat film comprising composite oxide particles and a matrix-forming component, wherein the composite oxide particles have a core-shell structure with zirconium oxide as a core and antimony pentoxide and / or silica as a shell. A coating liquid for forming a hard coat film, which is oxide particles. [Selection figure] None |