US 12,156,924 B2
Inorganic powder composite, method for producing same, water-in-oil emulsion composition, and sunscreen cosmetic
Shunsuke Mito, Osaka (JP); Kenji Kayahara, Osaka (JP); and Naoki Kanda, Osaka (JP)
Assigned to TAYCA CORPORATION, Osaka (JP)
Appl. No. 17/287,590
Filed by TAYCA CORPORATION, Osaka (JP)
PCT Filed Oct. 18, 2019, PCT No. PCT/JP2019/041138
§ 371(c)(1), (2) Date Apr. 22, 2021,
PCT Pub. No. WO2020/085241, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 2018-199682 (JP), filed on Oct. 24, 2018.
Prior Publication US 2021/0315781 A1, Oct. 14, 2021
Int. Cl. A61K 8/02 (2006.01); A61K 8/06 (2006.01); A61K 8/25 (2006.01); A61K 8/27 (2006.01); A61K 8/29 (2006.01); A61K 8/36 (2006.01); A61K 8/58 (2006.01); A61K 8/891 (2006.01); A61Q 17/04 (2006.01)
CPC A61K 8/022 (2013.01) [A61K 8/064 (2013.01); A61K 8/25 (2013.01); A61K 8/27 (2013.01); A61K 8/29 (2013.01); A61K 8/36 (2013.01); A61K 8/585 (2013.01); A61K 8/891 (2013.01); A61Q 17/04 (2013.01); A61K 2800/33 (2013.01); A61K 2800/413 (2013.01); A61K 2800/623 (2013.01); A61K 2800/624 (2013.01); A61K 2800/805 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An inorganic powder composite including:
an inorganic powder; a first hydrophobic treatment agent, a second hydrophobic treatment agent, and a hydrophilic treatment agent, which cover at least one part of a surface of the inorganic powder, wherein the first hydrophobic treatment agent is a silicon compound, the second hydrophobic treatment agent is a fatty acid, and the hydrophilic treatment agent is hydrous silica, wherein the inorganic powder composite has the property to be able to form an emulsion without the presence of an emulsifying agent.