Vat plus oxidative colors
AssigneeWella Germany GmbH
InventorsMarkus SPECKBACHER, Ingo WEBER, Petra BRAUN, Sonja TELSER, Tatjana SCHAEFER, Olga PRYADILOVA
Life of this patent
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Abstract
Methods and compositions for coloring keratinous substrates, such as mammalian hair and in particular human hair, use oxidative dye precursors comprising pyrazole primaries and couplers, and solubilized vat dyes. The methods and compositions improve the wash fastness of hair color produced by oxidative dyes, wherein one or more of the oxidative dyes are derived from oxidative dye precursors comprising a pyrazole primary and a coupler.
Claims77
A method for coloring a keratinous substrate, comprising:
- a1 applying a composition A to said keratinous substrate, said composition A comprising an aqueous medium, and oxidative dye precursors dissolved in said aqueous medium, said oxidative dye precursors comprising a pyrazole primary and a coupler, wherein the pyrazole primary comprises a 4,5-diaminopyrazole, an aminopyrazolopyridine, a ring-condensed 4,5-diaminopyrazolone, or a combination thereof,
- a2 applying a composition B to said keratinous substrate, said composition B comprising an aqueous medium and a solubilized vat dye dissolved in said aqueous medium, wherein the solubilized vat dye is a leuco vat dye sulfonic ester,
- b subsequent to step a2, applying a composition C to said keratinous substrate, said composition C comprising an oxidizing agent.
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A ready-to-use hair coloring formulation, said hair coloring formulation obtained by mixing a composition A with a composition B, said composition A comprising an aqueous medium, and oxidative dye precursors dissolved in said aqueous medium, said oxidative dye precursors comprising a pyrazole primary and a coupler, wherein the pyrazole primary comprises a 4,5-diaminopyrazole, an aminopyrazolopyridine, a ring-condensed 4,5-diaminopyrazolone, or a combination thereof, said composition B comprising an aqueous medium and a solubilized vat dye dissolved in said aqueous medium, wherein the solubilized vat dye is a leuco vat dye sulfonic ester.
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A kit for coloring hair, comprising in separate compartments:
- a compartment A comprising a composition A, said composition A comprising an aqueous medium, and oxidative dye precursors dissolved in said aqueous medium, said oxidative dye precursors comprising a pyrazole primary and a coupler, wherein the pyrazole primary comprises a 4,5-diaminopyrazole, an aminopyrazolopyridine, a ring-condensed 4,5-diaminopyrazolone, or a combination thereof, and
- a compartment B comprising a composition B, said composition B comprising an aqueous medium and a solubilized vat dye dissolved in said aqueous medium, wherein the solubilized vat dye is a leuco vat dye sulfonic ester.
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A gel-like hair coloring component, comprising one or more leuco vat dye sulfonic esters, each in a concentration of 0.50-2.0 wt %, 10.0-30.0 wt % of one or more saturated or unsaturated fatty acids, and 50-89.50 wt % water, wherein wt % each is based on the weight of the component.
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A shampoo-like hair coloring component, comprising one or more leuco vat dye sulfonic esters, each in a concentration of 0.50-2.0 wt %, 2.0-40.0 wt % anionic surfactant, 2.0-20.0 wt % amphoteric surfactant, 0-10.0 wt % of an optional humectant, and 50.0-95.50 wt % water, wherein wt % each is based on the weight of the component.
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Dependencies are inferred from the claim text.