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EP0465339A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Keratinous fibres dyeing process with derivatives of 4-hydroxyindol at acidic pH and compositions

Assignee: L'Oréal SA
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Filing: 1991-07-02
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Granted: —
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Expires: 2011-07-02
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Abstract

Abstract Translated from French Procédé de teinture des fibres kératiniques, en particulier des fibres kératiniques humaines, telles que les cheveux, caractérisé par le fait qu'on applique sur ces fibres une composition contenant dans un milieu approprié pour la teinture, au moins un dérivé de 4-hydroxyindole de formule : <IMAGE> dans laquelle R1 désigne hydrogène, alkyle en C1-C4; R2 et R3, identiques ou différents, désignent hydrogène, alkyle en C1-C4, carboxyle ou alcoxycarbonyle; X désigne hydrogène, alkyle en C1-C4, alcoxy en C1-C18, halogène, acétylamino; au moins l'un des groupements X, R1, R2, R3 étant différent d'hydrogène; ainsi que les sels de ces composés; au moins un précurseur de colorant d'oxydation; au moins un agent oxydant; le pH de la composition appliquée sur les fibres étant inférieur à 7. Process for dyeing keratin fibers, in particular human keratin fibers, such as the hair, characterized in that a composition containing, in a medium suitable for dyeing, at least one 4-hydroxyindole derivative of formula: <IMAGE> in which R1 denotes hydrogen, C1-C4 alkyl; R2 and R3, identical or different, denote hydrogen, C1-C4 alkyl, carboxyl or alkoxycarbonyl; X denotes hydrogen, C1-C4 alkyl, C1-C18 alkoxy, halogen, acetylamino; at least one of the groups X, R1, R2, R3 being other than hydrogen; as well as the salts of these compounds; at least one oxidation dye precursor; at least one oxidizing agent; the pH of the composition applied to the fibers being less than 7.

Inventors

  • 👤 Jean Cotteret
  • 👤 Marie Pascale Audousset

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 13:19
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/4906; A61K8/4913; A61K8/492; A61Q; A61Q5/00; A61Q5/10

Claims Analysis

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References Cited (Backward Citations)

GB2211517A Cited
FR2636237A1 Cited
EP0428441A2 Cited

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