Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Reexamination Certificate
2006-08-01
2006-08-01
Sample, David (Department: 1755)
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
C423S598000, C428S404000, C424S059000, C424S489000, C424S724000
Reexamination Certificate
active
07083769
ABSTRACT:
Silicon-titanium mixed oxide powder prepared by flame hydrolysis, having a ratio by weight of silicon dioxide/titanium dioxide, which is greater on the surface of the primary particles than that within the total primary particle. It is prepared by a flame hydrolysis process, in that a stream consisting of a vaporous titanium dioxide precursor and oxygen or an oxygen-containing gas and hydrogen, and a second stream consisting of a vaporous silicon dioxide precursor and a carrier gas consisting of oxygen, an oxygen-containing gas and/or an inert gas, are guided separately into the reaction chamber of a burner such as is known for the preparation of pyrogenic oxides, and are burnt here, the solid mixed oxide powder and hot gases are subsequently cooled, and the gases are separated from the solid. The powder may be used, for example, for the preparation of sunscreen preparations.
REFERENCES:
patent: 5451390 (1995-09-01), Hartmann et al.
patent: 36 11 449 (1987-10-01), None
patent: 42 35 996 (1994-04-01), None
patent: 0 988 853 (2000-03-01), None
Patent Abstracts of Europe, EP 1 256 550, Nov. 13, 2002.
Patent Abstracts of Japan, JP 07-041315, Feb. 10, 1995.
Technical data'sof Admatechs K. K., “Titania-Silica Composite Oxide”, 2 pages.
Patent Abstracts of Japan, JP 63-045123, Feb. 26, 1988.
A. T. Liu, et al., Novel Ceramic Fabrication Processes and Applications, pp. 1-10, XP-001179377, “Production of Fumed Oxides by Flame Hydrolysis”, 1986.
C.-H. Hung, et al., Journal of Materials Research, vol. 7, No. 7, pp. 1861-1869, XP-009025974, “Formation of Mixed Oxide Powders in Flames: Part I. TiO2-SiO2”, Jul. 1992.
Nicholas J. Lowe, et al., “Sunscreens Development, Evaluation, and Regualatory Aspects”, Cosmetic Science and Technology, vol. 10, pp. 211-266.
Andreas Domsch., “Die kosmeticschen Präparate”, Verlag für chemische Industrie (Ed. H. Ziolkowsky), 4th Edition, 1992, pp. 446-469.
Diener Uwe
Habermann Herbert
Hasenzahl Steffen
Hemme Ina
Moerters Martin
Degussa - AG
Sample David
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