Cosmetic compositions
A cosmetic composition comprises a) an N-acyl amino acid compound selected from the group consisting of N-acyl amino acid, its isomers, its salts, derivatives thereof, and mixtures thereof, and b) hexyldecanol.
1. A cosmetic composition for lightening skin tone comprising:
a) a safe and effective amount of an N-acyl amino acid compound selected from the group consisting of N-acyl amino acid, its isomers, its salts, derivatives thereof, and mixtures thereof, wherein the safe and effective amount of N-acyl amino acid compound provides a skin lightening benefit; and
b) hexyldecanol, wherein a ratio of hexyldecanol to N-acyl amino acid is no less than 4.
2. The cosmetic composition of claim 1 wherein said N-acyl amino acid is selected from the group consisting of N-acyl phenylalanine, N-acyl tyrosine, their isomers, their salts, derivatives thereof, and mixtures thereof.
3. The cosmetic composition of claim 2 wherein said N-acyl phenylalanine is N-undecylnoyl-L-phenylalanine.
4. The cosmetic composition of claim 1 wherein said composition comprises said N-acyl amino acid compound in the range of from about 0.001% to about 10% by weight of the composition.
5. The cosmetic composition of claim 1 wherein said composition comprises said hexyldecanol in the range of from about 0.004% to about 50% by weight of the composition.
6. The cosmetic composition according to claim 1 , wherein said composition further comprises a skin care active selected from the group consisting of vitamin B 3 compounds, whitening agents, peptides, sugar amines, and mixtures thereof.
7. The cosmetic composition according to claim 6 , wherein said skin care active is vitamin B 3 compounds.
8. The cosmetic composition according to claim 1 , wherein said composition further comprises sunscreen agents.
9. The cosmetic composition according to claim 1 , wherein said composition further comprises an additional solvent for said N-acyl amino acid compound.
10. The cosmetic composition according to claim 1 , wherein said composition is oil-in-water emulsion comprising an oil phase comprising said N-acyl amino acid compound and said hexyldecanol dispersed in a continuous aqueous phase.
11. The cosmetic composition according to claim 10 , wherein said composition further comprises a non-emulsifying crosslinked siloxane elastomer.
12. A method of regulating the condition of skin, said method comprises applying to the skin of a human, a safe and effective amount of a cosmetic composition according to claim 1 .
13. A method of preparing a cosmetic composition for lightening skin tone comprising:
dispersing a first oil phase comprising a safe and effective amount of an N-acyl amino acid compound and hexyldecanol in a continuous aqueous phase, wherein the safe and effective amount of N-acyl amino acid compound provides a skin lightening benefit; and
dispersing a second oil phase in the continuous aqueous phase wherein a ratio of hexyldecanol to N-acyl amino acid is no less than 4.
14. The method according to claim 13 , wherein said second oil phase comprises a non-emulsifying crosslinked siloxane elastomer.
15. The cosmetic composition of claim 1 , further comprising an emulsifier.