Shiseido Company, Limited

Dow Corning Toray Company, Ltd.

Shuji Nishihama

Tadashi Okawa

Hiroshi Fukui

Tomohiro Iimura

Hidefumi Araki

Tomoko Ikeda

Katsuyuki Kaneko

Koji Abe

Yasunari Nakama

Isamu Kaneda

Tetsuya Kanemaru

Tomo Osawa

Shoichiro Shio

Atsushi Sogabe

Shin-ichi Yusa

To provide surface-treating agents that can provide excellent hydrophobicity to powder and can improve its rinsability, to provide surface-treated powders that are treated with the surface-treating agent, and to provide cosmetics that comprise the surface-treated powder. A surface-treating agent consisting of a polymer which comprises a monomer (A) represented by the general formula (1) described below as a constituent monomer. (wherein Rrepresents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, Rrepresents an alkylene group having 4 to 22 carbon atoms, Xrepresents an &#x2014;NH&#x2014; group or an oxygen atom, and Mrepresents a hydrogen atom or a monovalent inorganic or organic cation.)

Surface-treating agents, surface-treated powders, and cosmetics comprising the same

The present invention provides a modified powder that is obtainable by coating the surface of a base powder with a hydrophobizing agent and a cationic surfactant. In the modified powder described above, it is preferable that the amount of coated hydrophobizing agent and the amount of coated cationic surfactant are 3 to 90% by mass and 0.5 to 10% by mass, respectively, relative to the self weight of the base powder. In the modified powder described above, it is preferable that the mass ratio of the coated hydrophobizing agent and the coated cationic surfactant is from 1:1 to 9:1. In addition, the present invention provides a cosmetic composition comprising the above modified powder wherein the modified powder and the base powder have an ultraviolet scattering effect. In the cosmetic composition described above, it is preferable that the blended amount of the modified powder is from 0.5 to 100% by mass. Furthermore, the present invention provides a sunscreen cosmetic composition comprising the above modified powder with an ultraviolet scattering effect. In the sunscreen cosmetic composition described above, it is preferable that the base powder is one or more selected from the group consisting of titanium oxide, zinc oxide, iron oxide, cerium oxide, bismuth oxide, zirconium oxide, chromium oxide, and tungstic acid. In the sunscreen cosmetic composition described above, it is preferable that the blended amount of the modified powder is from 1 to 40% by mass.

Modified powder and cosmetic composition using the same

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.

Metal oxide/silica composite, and a cosmetic preparation comprising thereof

To provide a complex which is excellent in transparency and protective ability of UVB region by containing titanium oxide in a specific silica carrier and a cosmetic preparation which has natural finishing i.e., excellent in transparency by the complex and is excellent in protective ability of UVB region, a titanium-silica complex in accordance with the present invention comprises a silica carrier and titanium oxide, wherein said silica carrier is mainly composed of silicon oxide and wherein titanium oxide is contained in said silica carrier.

Titanium-silica complex and cosmetic preparation compounding the same

A cosmetic composition containing a hollow spherically shaped aluminosilicate, which is superior in sebum absorption, moisture control, and feeling of use and which has a natural finish.

Cosmetic composition

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Yokohama, Japan

Shuji Nishihama