Abstract: Disclosed herein are a dye composition comprising at least one mixed dye comprising at least one chromophore chosen from chromophores of the azo family and the tri(hetero)arylmethane family; and the mixed dyes. Further disclosed herein are a process for dyeing keratin fibers, such as human keratin fibers, using the composition, and a device comprising the composition.

Abstract: The present disclosure relates to cationic diazo dye compounds of formula (I): Dye1-LK-Dye2, ??(I) dye compositions comprising the direct dye compounds, and also to a process for dyeing keratin fibers using this composition and a multi-compartment kit.

Abstract: The present disclosure relates to dissymmetrical cationic diazo compounds having at least one 4-pyridinium unit and a cationic or non-cationic linker. The disclosure further relates to dyeing compositions comprising these compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers. Further, the disclosure relates to a method of coloring keratin fibers that employs this composition, and a device having a plurality of compartments.

Abstract: The present invention relates to a dye composition including at least one mixed dye containing at least one chromophore of methine or carbonyl type or their combinations. The invention furthermore relates to a process for dyeing keratin fibers, especially human keratin fibers, such as the hair, using the composition, and also to a suitable kit. The invention also relates to the abovementioned mixed dyes per se.

Abstract: The present disclosure relates to a cationic diazo compound of formula (I): Dye1-LK-Dye2 wherein Dye1 and Dye2 are such that the compound of formula (I) is not symmetrical, and are chosen from: The disclosure also relates to dye compositions comprising compounds of formula (I) as direct dye, and further relates to a process for dyeing keratin fibers using the compositions disclosed herein and also to a multi-compartment device.

Abstract: The present disclosure relates to compounds used as direct dyes, and dyeing compositions comprising such compounds. The disclosed compounds have the formula A-L-B, wherein A and B are chosen from arylazoimidazolium coloring functional groups, and L is a linker comprising at least one cationic group C. The disclosure also relates methods of using such compositions for coloring keratin fibers, such as the hair.

Abstract: The present disclosure relates to cationic diazo compounds chosen from those of formula (I) and the acid addition salts thereof: Dye1-LK-Dye2 (I); and to dye compositions comprising the the compounds as direct dye, and also to a process for dyeing keratin fibers using this composition and a multi-compartment device.

Abstract: The present disclosure relates to symmetrical cationic diazo compounds of formula (I), the resonance forms, and also the acid addition salts and/or the solvates thereof: The present disclosure further relates to dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, and also to a method of coloring keratin fibers that employs this composition, and a multi-compartment kit containing such compositions.

Abstract: Disclosed herein are compounds of formulae (I) and (II) below, and also to processes for the synthesis thereof: Also disclosed herein are dye compositions comprising said compounds, as cationic direct dyes, and methods for dyeing keratin fibers, for example, human keratin fibers, using these compositions.

Abstract: Disclosed herein is a mixed cationic direct dye comprising at least one anthraquinone chromophore and at least one cationic chromophore chosen from cationic azo chromophores and cationic hydrazone chromophores, wherein the at least one anthraquinone chromophore is bound to the at least one cationic chromophore by means of at least one linkage. Also disclosed herein is a dyeing composition comprising at least one mixed cationic direct dye. Further disclosed herein is a method of dyeing of keratin fibers, for example, keratin fibers, comprising applying said dyeing composition to the keratin fibers. Still further disclosed herein is a multi-compartment kit comprising at least one compartment comprising at least one dye composition and at least one second compartment comprising at least one oxidizing agen't.

Abstract: The present invention relates to cationic direct dyes of formula (I) below: in which W1 represents —NR8— or —O—; X1 represents N; CR9; R1 and R2, which may be identical or different, represent a hydrocarbon chain; R3 and R4, which may be identical or different, represent a hydrogen atom, a halogen atom, a nitro group, a cyano group or a hydrocarbon chain; R5, R6, R7, R8 and R9, which may be identical or different, represent a hydrogen atom or a hydrocarbon chain; L represents a specific bridging group and X represents a cosmetically acceptable organic or mineral anion. It likewise relates to a dye composition comprising, in a medium suitable for dyeing human keratin fibers, such a dye, a process using it, and also a multicompartment device.

Abstract: Disclosed are cationic diazo compounds of the following formula Dye1-LK-Dye2??(I) in which Dye1 and Dye2 represent: Also herein disclosed are dye compositions comprising the cationic diazo compounds as direct dye, a process for dyeing keratin fibers using this composition, and a multi-compartment device.

Abstract: The invention relates to a dye composition comprising a direct dye consisting of different chromophores, the dye having a particular L*a*b* value. The invention also relates to the dyeing process using this composition and to the use of this composition for dyeing keratin fibers. These compositions in particular make it possible to obtain particularly fast colorations.

Abstract: The present disclosure relates to the use of cationic azo compounds with julolidine units as direct dyes, for the dyeing of keratin fibers, including human keratin fibers, such as the hair. The present disclosure also relates to a dyeing composition for the dyeing of keratin fibers, including human keratin fibers such as the hair, containing at least one cationic direct azo dye with julolidine units, in a suitable dyeing medium. The present disclosure also relates to a method of dyeing of keratin fibers, including human keratin fibers such as the hair, employing the dyeing composition according to the disclosure. The present disclosure also relates to cationic azo compounds with julolidine units.

Abstract: A composition comprising, in a medium that is suitable for dyeing, at least one ninhydrin derivative chosen from compounds of formula (I) and tautomers thereof: wherein: A represents a fused or non-fused, at least 6-membered aromatic mono- or polycyclic group, possibly comprising at least one hetero atom chosen from nitrogen, oxygen, sulphur, and phosphorus atoms, a dyeing process using the composition, and a multi-component coloring agent comprising the composition.

Abstract: The present disclosure relates to dissymmetrical cationic diazo compounds having at least one 2-imidazolium unit and a cationic or non-cationic linker. The disclosure further relates to dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, and also to a method of coloring keratin fibers that employs this composition, and to a device having a plurality of compartments.

Abstract: Disclosed herein are symmetrical cationic diazo compounds chosen from compounds of formula (I), their resonance forms, their acid addition salts, and their solvates: Also disclosed herein are dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, a method of coloring keratin fibers comprising contacting the keratin fibers with such compositions, and a device comprising a plurality of compartments.

Abstract: The present disclosure relates to symmetrical cationic diazo compounds of formula (I), the resonance forms, and also the acid addition salts and/or the solvates thereof: The present disclosure further relates to dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, and also to a method of coloring keratin fibers that employs this composition, and a multi-compartment kit containing such compositions.

Abstract: The present disclosure relates to dissymmetrical cationic diazo compounds having at least one 4-pyridinium unit and a cationic or non-cationic linker. The disclosure further relates to dyeing compositions comprising these compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers. Further, the disclosure relates to a method of coloring keratin fibers that employs this composition, and a device having a plurality of compartments.

Abstract: The present disclosure relates to symmetrical cationic diazo compounds of formula (I) below, their resonance forms, and also their acid addition salts and their solvates: wherein W1 radicals, which are identical, are chosen from a halogen atom, or an —NR4-Ph-NR5R6, —NR4-Ph-OR7, —O-Ph-OR7 or —O-Ph-NR5R6 group or else an —NR5R6 or —OR7 group with certain provisos; L, a non-cationic linker connecting the two identical azo chromophores, is chosen from a covalent bond; an optionally substituted C1-C40 alkyl radical optionally interrupted by a (hetero)cycle, the alkyl radical being optionally interrupted by at least one heteroatom or group comprising at least one heteroatom or an optionally substituted phenyl radical. The disclosure further relates to dyeing compositions comprising such compounds as a direct dye in a medium appropriate for the dyeing of keratin fibers, and also to a method of coloring keratin fibers that employs this composition, and a device comprising a plurality of compartments.