Stabilized monomer dispersion containing inorganic oxide nanoparticles with high refractive index and its preparation

A process for preparing a stabilized monomer dispersion containing inorganic oxide nanoparticles with a high refractive index greater than 1.65, the process comprising the steps of:

• condensing and then hydrolyzing an alkoxide precursor corresponding to the inorganic oxide in a reactive monomer serving as a solvent in the presence of an chelating agent and water at a temperature of from 0 to 50° C. to produce a dispersion consisting of the monomer and inorganic oxide nanoparticles dispersed therein, wherein the equivalent ratio of the water to the alkoxide is equal to or less than 3, and the equivalent ratio of the chelating agent to the alkoxide is at least 2.