COMPOSITIONS COMPRISING A SKIN-LIGHTENING RESORCINOL AND A SKIN DARKENING AGENT
The present invention relates to a composition comprising a skin-lightening resorcinol and a skin darkening agent. The composition may be topically applied to the skin, such as to treat signs of aging.
1 - 10 . (canceled)
11 . A method of treating a sign of aging, comprising topically applying to skin in need of said treatment a composition comprising a skin-lightening resorcinol and a skin darkening agent.
12 . The method of claim 11 , wherein the skin-lightening resorcinol comprises at least one substitution comprising a linear or branched alkyl group having from 2 to 18 carbon atoms.
13 . The method of claim 11 , wherein the skin-lightening resorcinol is 4-hexylresorcinol.
14 . The method of claim 11 , wherein the skin darkening agent is an amine compound of formula I or formula II:
wherein R 1 , R 2 , R 3 , R 4 , and R 5 are independently selected from the group consisting of hydrogen, C 1 —C 6 alkyl, and C 1 —C 6 hydroxyalkyl; or a cosmetically-acceptable salt thereof.
15 . The method of claim 11 , wherein the skin darkening agent is selected from the group consisting of N,N,N′,N′-tetrakis(2-hydroxypropyl)ethylenediamine, N, N, N′, N′-tetrakis (2-hydroxyethyl) ethylene diamine, N, N, N′, N′-tetramethylethylene diamine, enantiomers thereof, diastereoisomers thereof, and cosmetically-acceptable salts thereof.
16 . The method of claim 11 , wherein the skin darkening agent is a self tanning agent.
17 . The method of claim 11 , wherein the skin darkening agent is a self tanning agent selected from the group consisting of 1,3-dihydroxyacetone, 1,3,4-trihydroxy-2-butanone, and mixtures thereof.
18 . The method of claim 11 , wherein the skin darkening agent is a melanin enhancement agent.
19 . The method of claim 18 , wherein the melanin enhancement agent an extract of Onosis spinosa.
20 . The method of claim 11 , wherein the skin darkening agent and the skin-lightening resorcinol are present in a concentration by weight ratio of at least about 0.1.
21 . The method of claim 11 , wherein the sign of aging is selected from the group consisting of presence of lines and wrinkles, loss of elasticity, uneven skin, and blotchiness.