Core/shell type tetragonal titanium oxide particle water dispersion, making method, uv-shielding silicone coating composition and coated article

摘要

Core/shell type tetragonal titanium oxide particles consisting of a nanosized core of tetragonal titanium oxide having tin and manganese incorporated in solid solution and a shell of silicon oxide around the core are dispersed in an aqueous dispersing medium. The cores and the core/shell type titanium oxide particles have an average particle size of ≤30 nm and ≤50 nm, respectively. The amount of tin or manganese in solid solution is to provide a molar ratio Ti/Sn or Ti/Mn between 10 and 1,000.