JP2006527744A5 - - Google Patents

Claims (19)

  Lightening dye composition comprising an oxidizing agent, an alkaline agent in an amount to achieve a pH greater than 7 and a cationic mixed dye comprising several chromophores bonded together through a linker in a suitable dyeing medium A composition wherein at least two of the chromophores are different and the chromophore exhibits at least one absorption maximum between 400 and 800 nm. The chromophore is azo, xanthene, hydrazone and arylhydrazone, phenothiazine, acridine, diketopyrrolopyrrole, cyanine, especially tetraazacarbocyanine, anthraquinone, methine, azomethine, indigo, and nitro, especially nitro (hetero) aromatic, It is selected from the chromophore composition of claim 1. The composition according to claim 1 or 2 , wherein the mixed dye is dicationic. The composition according to claim 1 or 2 , wherein the mixed dye comprises 2 or 3 chromophores, at least two of the chromophores are cationic and the linker is cationic or non-cationic. The mixed dye corresponds to the formula: Dye 1-L-Dye 2, wherein L is a cationic or non-cationic linker and Dye 1 and Dye 2 are different cationic chromophores. The composition according to any one of 1 to 4 . The composition according to any one of claims 1 to 5 , wherein the mixed dye comprises a cationic azo chromophore. Wherein the linker is a C ₁ -C _{2 0,} linear, branched, or cyclic, a hydrocarbon-based chain, optionally substituted, one or more carbon atoms of the chain, sulfur May be substituted with at least one heteroatom such as nitrogen, or oxygen and / or with at least one group containing a heteroatom such as a carbonyl group, the hydrocarbon-based chain being unsaturated Or at least one optionally substituted alkenyl group; an optionally substituted arylene group; an optionally substituted divalent terephthalamide group; an optionally substituted divalent heterocyclic group such as a divalent triazine group; or 7. A composition according to any one of claims 1 to 6 , selected from those which may contain -NH-CO- groups. The linker is changed so that the position of the absorption maximum wavelength of the chromophore of the mixed dye on the scale is greater than 30 nanometers for each absorption maximum of the separately collected chromophores. 8. A composition according to any one of claims 1 to 7 comprising atoms or groups of atoms that separate each of the chromophores from the mixed dye in a manner that should not. The mixed dye has the following formula:

Wherein L is a linker and R 1 and R 1 ′ are preferably C ₁ -C ₆ alkyl groups, C ₁ -C ₂ alkoxy, C ₂ -C ₄ , optionally substituted with one or more hydroxyls. Independently selected from (poly) hydroxyalkoxy, amino, C ₁ -C ₂ (di) alkylamino, or an optionally substituted aryl group, R 2 and R 2 ′ are optionally substituted with one or more hydroxyls C ₁ -C ₆ alkyl group, C ₁ -C ₂ alkoxy, C ₂ -C ₄ (poly) hydroxyalkoxy, amino, or C ₁ -C ₂ (di) alkylamino group; independent of an optionally substituted phenyl group And An represents one or more of the same or different monovalent or polyvalent anions.
Corresponding to composition according to any one of claims 1 to 8. The mixed dye has the following structure:

The composition according to claim 8 , corresponding to Wherein the amount of mixed dye is said is between 0.001% to 20% relative to the total weight of the composition A composition according to any one of 0 claims 1 1. The composition according to any one of claims 1 to 11, wherein the pH is between 8 and 11. Oxidative dyeing of keratin fibers, characterized in that the dye composition according to any one of claims 1 to 12 is applied to keratin fibers in a time sufficient to obtain lightening and the desired coloration. Method. The oxidant is included in different compositions intended to include a defined mixed dye to any one of claims 1 to 13, The method of claim 13. Comprising a dye composition comprising a mixture dye first compartment is defined by claim 1 with an alkali agent to 1 1, the second compartment contains an oxidizing agent, multi-compartment device. Keratin fibers for dyeing lightening, the use of defined dye claims 1 to 1 2. Use according to claim 16 , for obtaining good shampoo resistance. Use according to claim 16 , for obtaining good resistance to coloration over time. Use according to claim 16 , for obtaining a dye composition which is stable over time.