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US 12,419,814 B2Granted
Emulsion cosmetic
AssigneeShiseido Company, Ltd.
InventorsKei Ujimoto, Kouichi Nagai, Marianne Ayaka Touati, Yuko Nagare, Satoshi Yamaki
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Abstract
Provided is an emulsion cosmetic having the innovative, unprecedented property in which the ultraviolet protection effects do not decrease, and conversely increase, due to heat applied in a usage environment. The present invention pertains to an emulsion cosmetic comprising (A) an ultraviolet protectant, (B) a polyhydric alcohol having an IOB value of 5.0 or lower, and (C) an ester oil having an IOB value of 0.3 or higher.
Claims15
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%.
10 more elements
Dependencies are inferred from the claim text.