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:
Sep. 27, 2005
Filed:
Sep. 25, 2001
Shuji Nishihama, Yokohama, JP;
Shuji Nishihama, Yokohama, JP;
Shiseido Co., Ltd., Tokyo, JP;
Abstract
The object of this invention is to provide a UV protective powder, and a cosmetic preparation in which the dispersibility of metal oxide is kept at a high level, and the UV protection activity and transparency of the preparation are satisfactorily maintained. A metal oxide/silica composite wherein metal oxide particles whose primary particle diameter is 1-1000 nm are co-dispersed finely with silica particles, and the metal oxide particles exist substantially as primary particles in the composite. The composite is preferably obtained by mixing (1) a dispersion comprising a silica sol where silica particles have a primary particle diameter of 1-150 nm, and (2) fine particles of metal oxide whose primary particle diameter is 1-1000 nm, or a sol of the same metal oxide, and the metal oxide existing as fine particles or a sol preferably consists of one, or two or more selected from a group consisting of titanium oxide, zinc oxide and cerium oxide. Also a cosmetic preparation comprising thereof is provided.