| abstract |
A process for producing a 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; a coating composition containing any of the composite sols and used for forming a coating film excellent in marring resistance, surface hardness, wearing resistance, transparency, heat resistance, light resistance, weatherability, and water resistance on optical members such as lenses for glasses or cameras, automotive windowpanes, or optical filters for liquid-crystal displays, plasma displays, etc.; and optical members having a cured film of the coating composition on the surfaces. |