Oxidation colorants for keratin fibers
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsGuenther Konrad, Iduna Matzik, Edgar Lieske
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Abstract
The use of indolines of formula (I): in which R1, R2, R3, R4 and R5 independently of one another represent hydrogen or C1-4 alkyl groups, or R4 and R5 together with the oxygen atoms to which they are attached may represent an alkylenedioxy group containing 1 to 4 carbon atoms, or their salts, as oxidation dye precursors gives natural brown hair colorings. The indolines of formula (I) are also suitable as couplers in oxidation hair dyes with a conventional primary intermediate, in which they result in a modification of the tints obtainable with the primary intermediate. They are used in conventional carriers, e.g., in gel or emulsion form, preferably mixed before use or on the hair with an oxidizing agent to develop the color.
Claims14
A process for oxidative dyeing of keratin fibers by contacting said keratin fibers with a dyeing composition comprising a carrier and indolines, or salts of indolines, corresponding to formula I:
- in which R1, R2, R3, R4, and R5 independently of one another represent hydrogen or C1-4 alkyl groups, or R4 and R5 together with the oxygen atoms to which they are attached may represent an alkylenedioxy group containing 1 to 4 carbon atoms, and causing oxidation of said dye-ing composition while it is in contact with said keratin fibers.
Hair dyes comprising oxidation dye precursors in a carrier, wherein indolines, or salts of indolines, of formula I:
- in which R1, R2, R3, R4, and R5 independently of one another represent hydrogen or C1-4 alkyl groups, or R4 and R5 together with the oxygen atoms to which they are attached may represent an alkylenedioxy group containing 1 to 4 carbon atoms are present in a quantity of 0.1 to 20 millimoles per 100 g of hair dye as oxidation dye precursors and the carrier is a gel containing 1 to 20% by weight of a soap or an oil-in-water emulsion containing 1 to 25% by weight of a fatty component and 0.5 to 30% by weight of an emulsifier from the group of anionic, nonionic, cationic, or ampholytic surfactants.
Dependencies are inferred from the claim text.