PROCESS FOR PRODUCING COMPOSITE SOLS, COATING COMPOSITION, AND OPTICAL MEMBER

摘要

The present invention relates to a method for producing titanium oxide (TiO2)-tin oxide (SnO2) composite sol, a titanium oxide (TiO2)-zirconium oxide (ZrO2)-tin oxide (SnO2) composite sol, and a titanium oxide (TiO2)-cerium oxide (CeO2)-tin oxide (SnO2) composite sol. Further, the present invention relates to a coating composition containing any of the above-mentioned composite sols for forming coating films that are excellent in marring resistance, surface hardness, wearing resistance, transparency, heat resistance, light- resistant, weatherability, or water resistance on optical elements such as lenses for glasses and cameras, automotive windowpane, or optical filters attached to liquid-crystal displays, plasma displays, etc. and to optical elements having a cured film of the coating composition on the surfaces.