US 12,419,814 B2
Emulsion cosmetic
Kei Ujimoto, Tokyo (JP); Kouichi Nagai, Tokyo (JP); Marianne Ayaka Touati, Tokyo (JP); Yuko Nagare, Tokyo (JP); and Satoshi Yamaki, Tokyo (JP)
Assigned to Shiseido Company, Ltd., Tokyo (JP)
Appl. No. 17/267,332
Filed by Shiseido Company, Ltd., Tokyo (JP)
PCT Filed Aug. 9, 2019, PCT No. PCT/JP2019/031597
§ 371(c)(1), (2) Date Feb. 9, 2021,
PCT Pub. No. WO2020/032243, PCT Pub. Date Feb. 13, 2020.
Claims priority of application No. 2018-151678 (JP), filed on Aug. 10, 2018.
Prior Publication US 2021/0338545 A1, Nov. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61K 8/06 (2006.01); A61K 8/34 (2006.01); A61K 8/37 (2006.01); A61K 8/39 (2006.01); A61K 8/86 (2006.01); A61Q 17/04 (2006.01)
CPC A61K 8/064 (2013.01) [A61K 8/345 (2013.01); A61K 8/37 (2013.01); A61K 8/39 (2013.01); A61K 8/86 (2013.01); A61Q 17/04 (2013.01); A61K 2800/591 (2013.01)] 15 Claims
 
1. An emulsion cosmetic comprising
(A) an ultraviolet protectant;
(B) a polyhydric alcohol having an IOB value of 5.0 or lower;
(C) an ester oil having an IOB value of 0.3 or higher, and
(D) polyoxyalkylene/polyoxyethylene copolymer dialkyl ether represented by the following formula (II):
R1O—[(AO)m(EO)n]—R2  (II)
wherein R1 and R2, each independently, denote a hydrocarbon group having one to four carbon atoms, AO denotes an oxyalkylene group having three or four carbon atoms, EO denotes an oxyethylene group, 1≤m≤70, 1≤n≤70 and m+n≤20,
wherein when the (A) ultraviolet protectant comprises 4-tert-butyl-4′-methoxy dibenzoyl methane, a blended amount thereof is 10% by mass or less relative to a total amount of the (A) ultraviolet protectant, and
wherein the (B) polyhydric alcohol is a polyethylene glycol having an average molecular weight of 150 to 23000, and
wherein the cosmetic does not contain phenylbenzimidazole sulfonic acid,
wherein the cosmetic does not contain ethylhexyl methoxycinnamate,
wherein a blended amount of (B) polyhydric alcohol is 2.5 to 30% by mass,
the emulsion cosmetic is a water-in-oil emulsion cosmetic, and
wherein a thermal reaction rate of the emulsion cosmetic is at least 105%.