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US 2010/0144918 A1Published application
Method for Preparing a Colloidal Zirconia Solution
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsFrederic Chaput, Fabien Berit-Debat, Claudine Biver, Noemie Lesartre
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Abstract
A method for preparing a colloidal solution of non-aggregated zirconia particles, comprising the following steps: a) providing a zirconium hydroxide sol, b) adding to said sol an inorganic acid according to an [inorganic acid]/[Zr] molar ratio of <0.5, c) performing the hydrothermal treatment of said sol, and d) recovering the colloidal solution of zirconia particles.
Claims24
-21. (canceled)
A method for preparing a colloidal solution of non-aggregated zirconia particles, comprising:
- a) providing a zirconium hydroxide suspension,
- b) adding to the suspension an inorganic acid according to an [inorganic acid]/[Zr] molar ratio of <0.5,
- c) hydrothermally treating the suspension,
- d) recovering the colloidal solution of zirconia particles.
1 more element
Dependencies are inferred from the claim text.