Essilor International (Compagnie Generale D'optique)

Shanghai University

Essilor International

Yin Zhao

Shuai Yuan

Liyi Shi

Jian Zhao

Zhuyi Wang

Yves Leclaire

Stephanie Pega

Xavier Panchout

Stéphanie Pega

The present invention pertains to a method for producing a colloidal suspension of zirconia particles, comprising the following successive steps: a) subjecting a mixture of zirconium oxychloride and an alkali metal halide in an aqueous solvent to hydrothermal treatment at a temperature above 150&#xb0; C., so as to obtain a suspension in the form of a two-phase mixture comprising a slurry and a supernatant, b) without first peptizing it, desalting said suspension so as to form a colloidal suspension of zirconia.

Method for producing zirconia colloids

A method for producing a colloidal alcoholic suspension of fluorine-doped SnOparticles. It also pertains to the colloidal suspension thus obtained and to its uses, especially in the manufacture of an antistatic coating for an optical article, such as an ophthalmic lens.

Fluorine-doped stannic oxide colloids and method for preparing same

The present invention pertains to a method for producing a colloidal suspension of zirconia particles, including successively subjecting a mixture of zirconium oxychloride and an alkali metal halide in an aqueous solvent to hydrothermal treatment at a temperature above 150&#xb0; C, separating the slurry obtained from the supernatant, and peptizing said slurry by adding a strong acid thereto, and desalting said slurry, for example by ultrafiltration, so as to form a colloidal suspension of zirconia. The present invention also pertains to the transparent colloidal suspension obtainable by this method, and to an optical article, such as an ophthalmic lens, comprising a transparent polymer substrate and at least one coating prepared from a composition comprising said colloidal suspension.

Growing community of inventors

Shanghai, China

Yin Zhao