	US 11,806,412 B2
	Oil-in-water emulsion sunscreen cosmetic
Satoshi Yamaki, Yokohama (JP); Kazutaka Sasaki, Yokohama (JP); Takashi Matsui, Yokohama (JP); and Kazuhiro Yamaguchi, Yokohama (JP)
Assigned to SHISEIDO COMPANY, LTD., Tokyo (JP)
Appl. No. 15/521,490
Filed by SHISEIDO COMPANY, LTD., Tokyo (JP)
PCT Filed Oct. 30, 2015, PCT No. PCT/JP2015/080765 § 371(c)(1), (2) Date Apr. 24, 2017, PCT Pub. No. WO2016/068299, PCT Pub. Date May 6, 2016.
Claims priority of application No. 2014-222963 (JP), filed on Oct. 31, 2014; and application No. 2015-181984 (JP), filed on Sep. 15, 2015.
Prior Publication US 2018/0271755 A1, Sep. 27, 2018
Int. Cl. A61K 8/06 (2006.01); A61K 8/36 (2006.01); A61K 8/86 (2006.01); A61K 8/31 (2006.01); A61Q 17/04 (2006.01); A61K 8/37 (2006.01); A61K 8/44 (2006.01); A61K 8/40 (2006.01)

CPC A61K 8/062 (2013.01) [A61K 8/06 (2013.01); A61K 8/36 (2013.01); A61K 8/361 (2013.01); A61K 8/37 (2013.01); A61K 8/40 (2013.01); A61K 8/44 (2013.01); A61K 8/86 (2013.01); A61Q 17/04 (2013.01); A61K 2800/522 (2013.01)]

7 Claims

1. An oil-in-water emulsion sunscreen cosmetic comprising:

(A) 5 to 40 mass % of one or more UV protective agents selected from the group consisting of UV absorbing agents and UV scattering agents;

(B) 5 to 20 mass % of a linear higher fatty acid that is solid at room temperature and that has 8 to 22 carbon atoms; and

(C) 0.1 to 5 mass % of one or more oils having at least an 0.5 IOB, wherein the one or more oils are ester oils, or are selected from the group consisting of polyethylene glycols, polypropylene glycols, polybutylene glycols, polyoxybutylene polyoxypropylene glycols, polyoxyethylene polyoxypropylene glycols and random polyoxyethylene/polyoxypropylene dimethyl ethers;

wherein a neutralization rate of the fatty acid is 13% to 51%;

wherein a blending ratio (A)/(B), between the (A) UV protective agent and the (B) fatty acid that is solid at room temperature ranges from 0.1 to 4.1;

wherein the UV protective effect of the cosmetic is improved upon coming into contact with moisture; and wherein the cosmetic does not comprise a surfactant.