Water and / or organic solvent dispersion containing linked group of crystalline inorganic oxide microparticles, method for producing the same, and coating liquid for optical substrate containing the linked crystalline inorganic oxide fine particle group

摘要

[Problem] To provide a dispersion fluid for inorganic oxide particles that is useful in the production of an optical base coating fluid suitable for the formation of a coating film (curable film for a hard-coat layer film, a primer layer film, etc.) having excellent mechanical strength (abrasion resistance, wear resistance), appearance conformance (cloudiness, interference fringes), adhesiveness, weather resistance, light resistance, crack resistance, and optical properties (high refractive index). [Solution] A dispersion fluid for water and/or an organic solvent that includes a linked crystalline inorganic oxide particle group and comprises: (1) crystalline inorganic oxide particles including silicon and at least one type of metal element (M2) selected from a group comprising titanium, zirconium, niobium, cerium, and zinc; (2) a coating substance that coats the particles (1) and comprises a composite oxide including silicon and at least one type of metal element (M1) selected from a group comprising zirconium, aluminum, and antimony; and (3) a composite oxide having the same composition as the coating substance. The linked crystalline inorganic oxide particle group is configured from a binding substance that links the particles (1) coated by the coating substance (2).