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:
Dec. 26, 2006
Filed:
Jul. 31, 2003
Makoto Tsuji, Wakayama, JP;
Hiromi Nambu, Wakayama, JP;
Makoto Inoue, Wakayama, JP;
Satoshi Sugawara, Tokyo, JP;
Yukio Inomata, Tokyo, JP;
Makoto Tsuji, Wakayama, JP;
Hiromi Nambu, Wakayama, JP;
Makoto Inoue, Wakayama, JP;
Satoshi Sugawara, Tokyo, JP;
Yukio Inomata, Tokyo, JP;
Kao Corporation, Tokyo, JP;
Abstract
The invention provides a polymer composite particle having superb blending stability even in a W/O emulsion cosmetic, a highly effective ultraviolet protection effect and a good feeling in use. The invention also relates to a method of producing the polymer composite particle and a cosmetic composition containing the polymer composite particle. A preferred polymer composite particle contains a metal oxide coated with a silicone and/or fluorine compound and has an average particle diameter of 1 μm or less, wherein the polymer composite particle is obtained by polymerizing a crosslinking agent with a vinyl monomer contained in an amount of 25% by weight based on 100% by weight of the sum of total of all the monomers and crosslinking agent and wherein the vinyl monomer has a solubility parameter calculated by the Fedors method of less than about 8.9. A preferred cosmetic composition may contain (A) a microparticle metal oxide having an average primary particle diameter of from 0.001 to 0.1 μm, and (B) a flake zinc oxide having an average primary particle size of from 0.1 μm to 1 μm and an average thickness of from 0.01 μm to 0.2 μm, which provides ultraviolet protection ability and visible-light transmittance.