| abstract |
【Task】 Coated inorganic oxide ultrafine particles with a high refractive index and excellent transparency, dispersibility, light resistance, weather resistance, etc., a sol solution in which the ultrafine particles are dispersed in water or an organic solvent, and the ultrafine particles at a high concentration Dispersed high refractive index transparent resin composition and optical material are provided. In addition, optical lenses (glass lenses, Fresnel lenses, CDs, DVDs and other information recording equipment, pickup lenses, digital cameras and other imaging equipment lenses, etc.), optical prisms, optical waveguides, optical fibers, thin film moldings, optical adhesives The present invention provides materials for optical members such as an agent, a sealing material for optical semiconductors, a diffraction grating, a light guide plate, a liquid crystal substrate, a light reflection plate, and an antireflection material. [Solution] Resin comprising coated inorganic oxide ultrafine particles having a refractive index of 1.5 to 2.8 and having a rutile type titanium oxide ultrafine particle as a core and a coating layer made of silicon oxide provided by a specific method It is an optical member using the composition and the resin composition. [Selection figure] None |