| US 7,531,184 B2 | ||
| Composite powders and cosmetics containing the same | ||
| Masaakira Horino, Kanagawa (Japan); Miwa Ohara, Saitama (Japan); Katsuki Ogawa, Kanagawa (Japan); and Sadaki Takata, Kanagawa (Japan) | ||
| Assigned to Miyoshi Kasei, Inc., Saitama-shi (Japan); and Shiseido Company, Ltd., Tokyo (Japan) | ||
| Filed on Feb. 25, 2003, as Appl. No. 10/372,669. | ||
| Application 10/372669 is a continuation of application No. PCT/JP01/07047, filed on Aug. 15, 2001. | ||
| Claims priority of application No. 2000-263749 (JP), filed on Aug. 31, 2000; and application No. 2001-77992 (JP), filed on Mar. 19, 2001. | ||
| Prior Publication US 2003/0180535 A1, Sep. 25, 2003 | ||
| Int. Cl. A61K 8/02 (2006.01); A61K 9/14 (2006.01); A61K 9/16 (2006.01) | ||
| U.S. Cl. 424—401 [424/489; 424/490] | 14 Claims |
| 1. A composite powder for cosmetics comprising a powdery base and aluminum hydroxide adhered to at least a portion of the
outer surface of said base, wherein said aluminum hydroxide is comprised of a formation of spherically shaped particles and
mesh formation of string shaped particles, and
wherein said base is a complex material comprising
a particle of powder selected from the group consisting of clay mineral, barium sulfate, alumina, silica and magnesium fluoride,
and
a coating on said particle of powder, said coating comprising at least one selected from the group consisting of titanium
oxide, basic lead carbonate, bismuth oxychloride, cadmium oxide, zirconium oxide, tin oxide, silver and gold,
wherein said spherically-shaped formation contained in the adhered aluminum hydroxide comprises any one of spheres, ellipsoids,
disc spheres, spindle-shaped spheres and combinations thereof in the planar and/or vertical direction,
wherein the length of a mesh forming the mesh formation of aluminum hydroxide is about 300 nm at the longest, with the thickness
(diameter) of a string of the mesh forming the mesh formation being about 5 to 30 nm;
wherein 2 to 75 weight % of aluminum hydroxide is present in a total weight of the adhered aluminum hydroxide and the base.
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