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US 12,653,769 B2Granted
Enhancing photostability of thiopyridinone compound without the use of UV filters
AssigneeL'oreal
InventorsNicholas David Stebbins, David Chan
Life of this patent
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Abstract
The instant disclosure relates to cosmetic compositions and methods of using the cosmetic compositions to benefit the skin. The cosmetic compositions typically include: (a) compounds of thiopyridinone type; (b) and one or more UV boosters. The compositions provide multiple benefits to skin. For example, the compositions are particularly useful for whitening the skin, and for improving skin's appearance.
Claims14
A cosmetic composition comprising:
- i) at least one thiopyridinone compound selected from a compound of formula (I) and a compound of formula (I′), or a salt, optical isomer, racemate, or solvate thereof, and mixtures thereof:
- wherein:
- R1 is selected from:
- a hydrogen atom;
- or
- a linear C1-C10 alkyl group or a branched C3-C10 alkyl group, each of which is optionally substituted with one or more groups independently selected from —OR3 and —SR3;
- R2 is selected from:
- a hydrogen atom;
- a linear C1-C12 alkyl group, a branched C3-C12 alkyl group, or a C3-C8 cycloalkyl group, each of which is optionally substituted with one or more groups independently selected from —OR3, —SR3, —C(O)OR3, and a C5-C12 aryl group optionally substituted with one or more groups independently selected from OH and C1-C8 alkoxy;
- or
- a C5-C12 aryl group optionally substituted with one or more groups independently selected from OH and C1-C8 alkoxy;
- R3 is selected from:
- a hydrogen atom;
- or
- a linear C1-C10 alkyl group or a branched C3-C10 alkyl group;
- ii) one or more UV boosters selected from the group consisting of ethylhexyl methoxycrylene, diethyl syringylidenemalonate, and mixtures thereof, and
- iii) 0 wt. % UV filters;
- wherein the weight percentages are based on the total weight of the cosmetic composition;
- and wherein the association of the one or more UV boosters improves the photostability of the at least one thiopyridinone compound.
16 more elements
A cosmetic composition comprising:
- i) from about 0.01 to about 10 wt. % of at least one thiopyridinone compound selected from a compound of formula (I) and a compound of formula (I′), or an optical isomer, racemate, or solvate thereof, and mixtures thereof:
- wherein:
- R1 is selected from:
- a hydrogen atom;
- or
- a linear C1-C10 alkyl group or a branched C3-C10 alkyl group, each of which is optionally substituted with one or more groups independently selected from —OR3 and —SR3;
- R2 is selected from:
- a hydrogen atom;
- a linear C1-C12 alkyl group, a branched C3-C12 alkyl group, or a C3-C8 cycloalkyl group, each of which is optionally substituted with one or more groups independently selected from —OR3, —SR3, —C(O)OR3, and a C5-C12 aryl group optionally substituted with one or more groups independently selected from OH and C1-C8 alkoxy;
- or
- a C5-C12 aryl group optionally substituted with one or more groups independently selected from OH and C1-C8 alkoxy;
- R3 is selected from:
- a hydrogen atom;
- or
- a linear C1-C10 alkyl group or a branched C3-C10 alkyl group;
- ii) from about 0.2 to about 4.8 wt. % of one or more UV boosters selected from the group consisting of ethylhexyl methoxycrylene, diethyl syringylidenemalonate, and mixtures thereof, and
- iii) 0 wt. % UV filters;
- wherein the weight percentages are based on the total weight of the cosmetic composition;
- and wherein the association of the one or more UV boosters improves the photostability of the at least one thiopyridinone compound.
16 more elements
Dependencies are inferred from the claim text.