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.
Claims20
A cosmetic composition comprising:
- i) at least one compound selected from compounds of formula (I) and tautomer of formula (I′) herein below or their salts;
- and their optical isomers, racemates, and/or solvates such as hydrates, alone or as a mixture:
- In which Formulas (I) and (I′):
- R1 denotes a radical chosen from:
- a) a hydrogen atom;
- b) a saturated linear C1-C10 or branched C3-C10 alkyl group optionally substituted with one or more groups, which may be identical or different, chosen from:
- i) —O—R3
- ii) —S—R3;
- R2 denotes a radical chosen from:
- a) a hydrogen atom;
- b) a saturated hydrocarbonated group linear C1-C12 or branched C3-C12 or cyclic C3-C8, optionally substituted with one or more groups, which may be identical or different, chosen from:
- i) —O—R3
- ii) —S—R3
- iii) —C(O)—O—R3;
- iv) a C5-C12 aryl group optionally substituted with one or more hydroxyls and/or with one or more C1-C8 alkoxy radicals;
- c) a C5-C12 aryl group optionally substituted with one or more hydroxyls and/or with one or more C1-C8 alkoxy radicals
- R3 denotes a radical chosen from:
- a) a hydrogen atom;
- b) a saturated linear C1-C10 or branched C3-C10 alkyl group;
- ii) one or more UV boosters;
- and
- wherein the association of one or more UV boosters improves the photostability of compounds of thiopyridinone.
A cosmetic composition comprising:
- i) from about 0.01 to about 10 wt. % of at least one compound selected from compounds of formula (I) and tautomer of formula (I′) herein below or their salts;
- and their optical isomers, racemates, and/or solvates such as hydrates, alone or as a mixture:
- In which Formulas (I) and (I′):
- R1 denotes a radical chosen from:
- a) a hydrogen atom;
- b) a saturated linear C1-C10 or branched C3-C10 alkyl group optionally substituted with one or more groups, which may be identical or different, chosen from:
- i) —O—R3
- ii) —S—R3;
- R2 denotes a radical chosen from:
- a) a hydrogen atom;
- b) a saturated hydrocarbonated group linear C1-C12 or branched C3-C12 or cyclic C3-C8, optionally substituted with one or more groups, which may be identical or different, chosen from:
- i) —O—R3
- ii) —S—R3
- iii) —C(O)—O—R3;
- iv) a C5-C12 aryl group optionally substituted with one or more hydroxyls and/or with one or more C1-C8 alkoxy radicals;
- c) a C5-C12 aryl group optionally substituted with one or more hydroxyls and/or with one or more C1-C8 alkoxy radicals
- R3 denotes a radical chosen from:
- a) a hydrogen atom;
- b) a saturated linear C1-C10 or branched C3-C10 alkyl group;
- ii) from about 0.2 to about 4.8 wt. % of one or more UV boosters;
- and
- wherein the one or more UV boosters improves the photostability of compounds of thiopyridinone;
- and wherein the weight percentages are based on the total weight of the cosmetic composition.
A method for photostabilizing compounds of thiopyridinone with one or more UV boosters comprising combining the compounds of thiopyridinone with the one or more UV boosters, thereby improving the photostability of the compounds of thiopyridinone.
Dependencies are inferred from the claim text.