	US 11,938,207 B2
	Cosmetic composition for skin
Teruyuki Fukuda, Wakayama (JP)
Assigned to KAO CORPORATION, Tokyo (JP)
Appl. No. 17/299,914
Filed by KAO CORPORATION, Tokyo (JP)
PCT Filed Nov. 22, 2019, PCT No. PCT/JP2019/045888 § 371(c)(1), (2) Date Jun. 4, 2021, PCT Pub. No. WO2020/116217, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 2018-230174 (JP), filed on Dec. 7, 2018.
Prior Publication US 2022/0031587 A1, Feb. 3, 2022
Int. Cl. A61K 8/34 (2006.01); A61K 8/25 (2006.01); A61K 8/31 (2006.01); A61K 8/42 (2006.01); A61K 8/81 (2006.01); A61K 8/898 (2006.01); A61Q 1/02 (2006.01)

CPC A61K 8/34 (2013.01) [A61K 8/25 (2013.01); A61K 8/31 (2013.01); A61K 8/42 (2013.01); A61K 8/8158 (2013.01); A61K 8/817 (2013.01); A61K 8/898 (2013.01); A61Q 1/02 (2013.01); A61K 2800/43 (2013.01); A61K 2800/5424 (2013.01); A61K 2800/5426 (2013.01); A61K 2800/594 (2013.01)]

20 Claims

1. A cosmetic composition for skin comprising a solvent A, a solvent B, and a polymer C, wherein

a boiling point of the solvent A is lower than 99° C., and a distance Ra of the Hansen solubility parameter of the solvent A to water as expressed by the following equation (1) is 36 or less,

a boiling point of the solvent B is 150° C. or higher, and a distance Ra of the Hansen solubility parameter of the solvent B to water as expressed by the following equation (1) is 40 or more,

the solvent B is compatible with the solvent A,

the polymer C is soluble in the solvent A but insoluble in the solvent B,

a content of the solvent A in the cosmetic composition is 50% by mass or more and 90% by mass or less,

a content of the solvent B in the cosmetic composition is 5% by mass or more and 40% by mass or less, and

a content of the polymer C in the cosmetic composition is 2% by mass or more and 15% by mass or less:

Ra=(4×ΔD²+ΔP²+ΔH²)^0.5 (1)

wherein,

ΔD is a difference of dispersing component in the Hansen solubility parameter between a solvent and water,

ΔP is a difference of a polar component in the Hansen solubility parameter between a solvent and water, and

ΔH is a difference of hydrogen-binding component in the Hansen solubility parameter between a solvent and water.