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US 12,491,146 B1Granted
Skin brightening compositions with thiopyridinone compound
AssigneeL'oreal
InventorsCatherine Chiou, Hungta Lin, Mariko Hasebe, Nicholas David Stebbins, Ritesh Kumar Sinha
Life of this patent
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Abstract
A cosmetic composition comprising: (a) 2-mercaptonicotinoyl glycine; (b) acyl glycinate surfactant; (c) a salt providing divalent cations having a charge density of about 40 to about 200 C/mm3 and a water solubility of at least 400 g/L; (d) anionic polymer; (e) glycerin; (f) water; and (g) reducing agent. The cosmetic composition is particularly useful in a method for brightening skin, depigmenting skin, treating hyperpigmentation of skin, treating melasmic skin, or evening skin tone.
Claims20
A cosmetic composition comprising:
- (a) about 0.05 to about 5 wt. % of 2-mercaptonicotinoyl glycine;
- (b) about 5 to about 25 wt. % of one or more acyl glycinate surfactants;
- (c) about 0.05 to about 5 wt. % of one or more salts providing divalent cations having a charge density of about 40 to about 200 C/mm3 and a water solubility of at least 400 g/L;
- (d) about 0.5 to about 6 wt. % of one or more anionic polymers;
- (e) about 35 to about 60 wt. % of glycerin;
- (f) about 15 to about 50 wt. % of water;
- and
- (g) about 0.1 to about 3 wt. % of one or more thiosulfate and/or bisulfite reducing agents;
- wherein the composition has a viscosity of about 25,000 cP to about 300,000 cP at 25° C. and a shear rate of 1 s−1, and all percentages by weight are based on a total weight of the composition.
6 more elements
A cosmetic composition consisting of:
- (a) about 0.05 to about 5 wt. % of 2-mercaptonicotinoyl glycine;
- (b) about 5 to about 25 wt. % of one or more acyl glycinate surfactants;
- (c) about 0.05 to about 5 wt. % of one or more salts providing divalent cations having a charge density of about 40 to about 200 C/mm3 and a water solubility of at least 400 g/L;
- (d) about 0.5 to about 6 wt. % of acrylates copolymer;
- (e) about 35 to about 60 wt. % of glycerin;
- (f) about 15 to about 50 wt. % of water;
- and
- (g) about 0.1 to about 3 wt. % of one or more thiosulfate and/or bisulfite reducing agents;
- (h) about 1 to about 10 wt. % of one or more nonionic emulsifiers having a Hydrophilic-Lipophilic (HLB) of about 6 or less;
- (i) one or more skin active agents;
- (j) optionally, one or more humectants selected from glycols having from 2 to about 10 carbon atoms;
- and
- (k) optionally, about 0.01 to about 5 wt. % of one or more miscellaneous ingredients;
- wherein the composition has a pH of about 4 to about 7,
- the composition has a lamellar liquid crystal structure,
- the composition has a viscosity of about 25,000 cP to about 300,000 cP at 25° C. and a shear rate of 1 s−1, and
- all percentages by weight are based on a total weight of the composition.
14 more elements
Dependencies are inferred from the claim text.