| abstract |
The present invention provides a zirconia particle dispersion composition capable of dispersing nano-sized zirconia particles well, and having good transparency and a good refractive index for the obtained hardened product. This zirconia particle dispersion composition is used for optical purposes, and is obtained by dispersing (A) zirconia particles in a dispersion medium. The average particle diameter of the (A) zirconia particles in the dispersion medium is 45 nm or less. In addition, the dispersion medium contains at least (B) a carboxyl compound, and the (B) carboxyl compound has a carboxyl group and an ethylenically unsaturated group in the molecule. It may further contain (C) a polymerizable compound, etc., which is a compound different from (B) a carboxyl compound. |