US 12,168,064 B2
Aqueous dispersion of a black iron oxide and a liquid cosmetic comprising the same
Shogo Kato, Tokyo (JP); and Kentaro Watanabe, Echizen (JP)
Assigned to JO COSMETICS CO., LTD., Tokyo (JP); and NISSIN CHEMICAL INDUSTRY CO., LTD., Echizen (JP)
Appl. No. 17/430,970
Filed by JO COSMETICS CO., LTD., Tokyo (JP); and NISSIN CHEMICAL INDUSTRY CO., LTD., Echizen (JP)
PCT Filed Feb. 12, 2020, PCT No. PCT/JP2020/005215
§ 371(c)(1), (2) Date Aug. 13, 2021,
PCT Pub. No. WO2020/166576, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 2019-025622 (JP), filed on Feb. 15, 2019.
Prior Publication US 2022/0133605 A1, May 5, 2022
Int. Cl. A61K 8/19 (2006.01); A61K 8/04 (2006.01); A61K 8/58 (2006.01); A61K 8/73 (2006.01); A61Q 1/10 (2006.01)
CPC A61K 8/19 (2013.01) [A61K 8/04 (2013.01); A61K 8/585 (2013.01); A61K 8/731 (2013.01); A61Q 1/10 (2013.01); A61K 2800/43 (2013.01); A61K 2800/95 (2013.01)] 16 Claims
 
1. A liquid cosmetic comprising an aqueous dispersion comprising a black iron oxide, water and hydroxypropylmethyl cellulose phthalate, wherein the black iron oxide is surface-silylated with an alkyltriethoxysilane and an amount of the aqueous dispersion in the liquid cosmetic is such that the amount of the black iron oxide is 0.1 to 40 mass %, relative to the liquid cosmetic.