The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 02, 2016
Filed:
Jan. 09, 2014
Essilor International (Compagnie Generale D'optique), Charenton le Pont, FR;
Shanghai University, Shanghai, CN;
Yves Leclaire, Charenton le Pont, FR;
Jian Zhao, Singapore, SG;
Liyi Shi, Shanghai, CN;
Zhuyi Wang, Shanghai, CN;
Shuai Yuan, Shanghai, CN;
Yin Zhao, Shanghai, CN;
ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE), Charenton le Pont, FR;
SHANGHAI UNIVERSITY, Shanghai, CN;
Abstract
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° 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.