Shiseido Company, Limited

Shoichiro Shio

Asa Kimura

Fukuji Suzuki

Masayoshi Wada

Shuji Nishihama

Atsushi Nakahira

Hideaki Murase

The present invention provides a porous titanium oxide having improved ultraviolet protection ability, usability, and transparency in the visible region and a process for producing thereof. The porous titanium oxide powder according to the present invention can be obtained by adding an alkali to a titanium salt solution containing a polyalcohol and then thermally hydrolyzing the solution. In addition, it is possible that after the addition of the alkali, an acid is further added to the solution and then the thermal hydrolysis is conducted, or that after thermal hydrolysis, further heat treatment with an acid is conducted. A porous titanium oxide has a mean particle size of 0.01 to 1.0 &#x3bc;m and a specific surface area of 50 m/g or more.

Porous titanium oxide and process for producing the same

It is to provide a production method of zinc oxide powder excellent in UV protection ability and transparency and to provide cosmetics containing the same. The fine particle zinc oxide powder is produced by subjecting either an aqueous solution containing both a water-soluble zinc salt and a carboxylic acid or an aqueous solution containing a water-soluble zinc carboxylate to pH adjustment with an alkali carbonate agent and aging the resulting mixture without calcining. The alkali carbonate agent may be 0.1 to 2 mol/L aqueous solution and the carboxylate group is 1 to 5 times in moles with respect to zinc. The pH adjustment can be carried out by dropwise addition of the alkali carbonate aqueous solution at 0.5 to 5 mL/min per 100 mL of either the aqueous solution containing both the water-soluble zinc salt and the carboxylic acid or the aqueous solution containing the water-soluble zinc carboxylate.

Production method of fine particle zinc oxide powder and cosmetics containing the same

There is provided a titanium oxide powder having excellent ultraviolet-protecting ability, usability and transparency, and a method of manufacturing the same. The titanium oxide powder provided is a porous titanium oxide powder that is formed from titanium oxide primary particles agglomerated together, has a mean particle diameter of 0.01 to 100 &#x3bc;m, and has a specific surface area of 250 to 500 m/g. The porous titanium oxide powder can be obtained by subjecting a titanium salt solution to hydrolysis by heating under the presence of an aliphatic alcohol and/or a substance having a carboxyl group or a carbonyl group, and then further carrying out heating treatment with an acid. The titanium oxide primary particles preferably have a mean particle diameter of 1 to 50 nm, and the powder preferably has an approximately spherical shape with the ratio of the minor axis to the major axis being at least 0.75.

Porous titanium oxide powder and method for production thereof

A rod-shaped mesoporous powder which is mainly composed of silicon oxide and has homogenous pore, and obtained by a process comprises, a dissolution step wherein a concentration of 0.3-1.2M of a silicate which is in the range of 0<SiO /Y O<2 (Y: alkali metal atom) is dissolved in the presence of a cationic surfactant and the pH is 11 or more, a condensation step wherein the pH is adjusted to 10.5 or less within 30 minutes, a rod micelle is formed with said cationic surfactant and a silicate is condensed on said rod micelle, and a removal step wherein said cationic surfactant is removed from a micelle state condensation which has an outer shell made of the silicate by said condensation.

Rod-shaped mesoporous powder, humectant adsorbing powder, and cosmetic preparation using the same

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 pigment containing low-order titanium oxide of this invention is characterized in that both aluminum oxide and silicon oxide exist together with low-order titanium oxide. A method of manufacturing such a pigment comprises the steps of; presenting an aluminum compound and silicon as a reducing agents together with titanium dioxide: and then heating and reducing the mixture in an atmosphere having a low oxygen content. According to this method, the pigment containing low-order titanium oxide can efficiently be manufactured, while preventing sintering generated due to the fusion between the reducing agents or the reducing agents and powders.

Growing community of inventors

Yokohama, Japan

Shoichiro Shio