| 摘要 |
<p>To provide hollow fine particles with which a coating film having a high antireflection effect and high film strength can be obtained, a production process thereof, a coating composition with which a coating film having a high antireflection effect and high film strength can be formed, and an article which can maintain a high antireflection effect for a long period of time. Hollow fine particles containing SiO 2 as the main component and containing other metal, wherein the amount of said other metal (as calculated as oxide) is from 0.2 to 8 parts by mass based on 100 parts by mass of SiO 2 ; a coating composition containing the hollow fine particles and a dispersion medium; an article having a coating film comprising the coating composition formed on a substrate; and a process for producing hollow fine particles, which comprises (a) a step of, in a dispersion containing a SiO 2 precursor material, at least one compound containing other metal, selected from the group consisting of a metal chelate compound, an organic tin compound, a metal alcoholate and a metal fatty acid salt, and core fine particles, precipitating a shell containing SiO 2 as the main component and containing other metal on the surface of each core fine particle to obtain core/shell particles, and (b) a step of dissolving or decomposing the core fine particles of the core/shell fine particles.</p> |
