Method for producing zirconia colloids

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United States of America Patent

PATENT NO 9250360
SERIAL NO

14151434

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Abstract

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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.

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Patent Owner(s)

  • ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE);SHANGHAI UNIVERSITY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Leclaire, Yves Charenton le Pont, FR 20 213
Shi, Liyi Shanghai, CN 11 15
Wang, Zhuyi Shanghai, CN 5 7
Yuan, Shuai Shanghai, CN 56 42
Zhao, Jian Singapore, SG 394 4891
Zhao, Yin Shanghai, CN 108 317

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