C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
261/2
C03C 11/00 (2006.01) B01J 13/04 (2006.01) B01J 13/20 (2006.01) B01J 35/08 (2006.01) B01J 37/00 (2006.01) C04B 14/30 (2006.01) C04B 30/00 (2006.01) C04B 38/00 (2006.01) C08J 9/32 (2006.01) C08K 7/18 (2006.01)
Patent
CA 1061366
Abstract of the Disclosure Shaped and fired, porous or impermeable non- vitreous ceramic microcapsules of metal oxide, preferably transparent and polycrystalline, are made by a non-melt process comprising the liquid-liquid extraction of aqueous metal oxide precursor with a dehydrating liquid having a limited water solubility, and drying and firing the result- ing gelled microcapsules. For example, and aqueous titania sol is added to an agitated body of n-butanol to form a dispersion of droplets of said sol and water is rapidly extracted from the droplets to form gelled microcapsules; the latter are recovered by filtration, dried, and fired to convert them into transparent, sealed or heat-sealable, non-vitreous ceramic, spherical microcapsules of poly- crystalline titania. The microcapsules can be used as fillers for plastic and other composites or filled with a selected solid, liquid or gas for purpose of storing, transporting, or facilitating the use of the same.
215704
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