US 4,228,151 AGranted

Cosmetic composition for imparting to human skin a coloration resembling a natural tan

AssigneeL'oreal

InventorsGerard Lang, Serge Forestier

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Abstract

A cosmetic composition for imparting to human skin after exposure to sunlight a coloration resembling a natural tan comprises a cosmetic vehicle suitable for topical application to the skin and an effective amount of at least one compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 each independently represent hydrogen, an aliphatic radical having 1-18 carbon atoms, carbalkoxy having 2-5 carbon atoms, acyl having 2-5 carbon atoms, aryl, aryl substituted by alkyl having 1-4 carbon atoms or hydroxy, a heterocycle containing 4-6 members, substituted or not by alkyl having 1-4 carbon atoms, halogen or hydroxy, or R.sub.1 and R.sub.2 together form a saturated ring containing 4-12 chains, optionally substituted by alkyl having 1-4 carbon atoms, halogen or hydroxy, or bridged and containing a heteroatom selected from N, O or S; and R.sub.3 represents hydrogen, a lower aliphatic group containing 1-6 carbon atoms, lower alkoxy containing 1-4 carbon atoms or halogen, with the proviso that R.sub.1, R.sub.2 and R.sub.3 are not hydrogen simultaneously; and an acid addition salt thereof.

Claims19

Dependent claims

A process for coloring human skin comprising applying to the skin in an amount sufficient to impart to said skin after exposure to ultraviolet rays a coloration resembling a natural tan a composition comprising a cosmetic vehicle suitable for topical application to the skin selected from the group consisting of

(1) a hydroalcoholic solution containing 10-90 weight percent alcohol,
(2) a glycerin-alcoholic solution containing 10-90 weight percent alcohol,
(3) a glycerin-hydroalcoholic solution containing 10-90 weight percent alcohol,
(4) an oleo-alcohol composition containing a vegetable oil, a lower alkyl ester and a lower alcohol having 1-4 carbon atoms,
(5) an aqueous gel including a surfactant and a gel forming agent, and
(6) an oil-in-water emulsion including a surfactant, an oil, a thickening agent and a humectant,
and at least one compound selected from the group consisting of
(a) a compound of the formula ##STR3## wherein R.sub.1 and R.sub.2 each independently represent hydrogen, a linear or branched alkyl having 1-18 carbon atoms, carbalkoxy having 2-5 carbon atoms, acyl having 2-5 carbon atoms, phenyl and phenyl substituted by a member selected from the group consisting of alkyl having 1-4 carbon atoms and hydroxy, and
R.sub.3 represents hydrogen, lower alkyl containing 1-6 carbon atoms, lower alkoxy containing 1-4 carbon atoms or halogen,
with the proviso that R.sub.1, R.sub.2 and R.sub.3 are not hydrogen simultaneously;
and
(b) an acid addition salt of the compound in (a),
said compound being present in an amount of 0.5-10 percent by weight of said composition, and said composition having a pH between 3 and 8.5, and
exposing the skin to ultraviolet rays for a time effective to develop said color on said skin.

11 more elements

Dependencies are inferred from the claim text.