Process for dyeing keratinous fibers with 5,6-dihydroxyindole in combination with an iodide and a hydrogen peroxide composition at alkaline pH

Claim 2

A plural stage process for dyeing keratinous fibers comprising applying to said fibers, in an amount effective to dye said keratinous fibers, a composition (A) containing, in an appropriate medium for dyeing, 5,6-dihydroxyindole, present in an amount ranging from 0.01 to 5 percent by weight, based on the total weight of said composition (A), and iodide ions, present in an amount ranging from 0.007 to 4 percent by weight, expressed as I - ions, based on the total weight of said composition (A), the application of said composition (A) being preceded or followed by applying to said fibers composition (B) containing, in an appropriate medium for dyeing, hydrogen peroxide at a concentration ranging from 1 to 40 volumes, at an alkaline pH of less than 12.

Claim 3

The process of claim 1 wherein said composition (B) also contains at least one oxidation dye selected from the group consisting of a paraphenylenediamine, a para-aminophenol, a paradiphenol, an ortho-aminophenol, an ortho-phenylenediamine, an ortho-diphenol and a heterocyclic derivative.

Claim 4

The process of claim 2 wherein said composition (B) also contains a tinter or coupler selected from the group consisting of a meta-diphenol, a meta-aminophenol, a metaphenylenediamine, a monohydroxynaphthalene derivative, a polyhdyroxynaphthalene derivative and a pyrazolone.

Claim 5

The process of claim 1 wherein said composition (B) also contains an oxidation dye capable of being rapidly oxidized and selected from the group consisting of a trihydroxylated benzene derivative, a monoamino dihydroxybenzene, a monoamino monohydroxy benzene, a diamino dihydroxybenzene and a diamino monohydroxybenzene.

Claim 6

The process of claim 1 wherein said iodide ions are selected from the group consisting of alkali metal iodides, alkaline earth metal iodides and ammonium iodides.

Claim 7

The process of claim 1 wherein the weight ratio of said 5,6-dihydroxyindole to said iodide ions ranges from 0.05 to 10.

Claim 8

The process of claim 1 wherein the application of compositions (A) and (B) is separated by a rinsing stage.

Claim 9

The process of claim 1 comprising, in a first stage, applying composition (A) containing iodide ions in the form of an alkali metal iodide, an alkaline earth metal iodide or an ammonium iodide, and said 5,6-dihydroxyindole and, in a subsequent stage, applying said composition (B) containing hydrogen peroxide at an alkaline pH less than 12.

Claim 10

The process of claim 1 wherein said composition (A), containing said 5,6-dihydroxyindole and said iodide ions, is applied to said fibers with an exposure time ranging from 10 seconds to 45 minutes, and wherein said composition (B), containing said hydrogen peroxide, is applied to said fibers with an exposure time ranging from 10 seconds to 45 minutes, the time selected being dependent on the shade desired.

Claim 11

The process of claim 1 wherein said compositions (A) and (B) are in the form of a thickened or gelled liquid, a cream, an emulsion or a foam.

Claim 12

The process of claim 1 wherein said appropriate medium of compositions (A) is water or a mixture of water and an organic solvent, said composition (A) having a pH ranging from 2 to 7.

Claim 13

The process of claim 1 wherein said composition (A) is in the form of a solution in an anhydrous solvent medium.

Claim 14

The process of claim 11 or 12 wherein said solvent is selected from the group consisting of ethyl alcohol, propyl alcohol, isopropyl alcohol, tert. butyl alcohol, ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether acetate, propylene glycol, monomethyl ether or propylene glycol, monomethyl ether of dipropylene glycol and methyl lactate.

Claim 15

The process of claim 1 wherein one or both of said compositions (A) and (B) contain at least one adjuvant selected from the group consisting of (a) a fatty amide present in an amount ranging from 0.05 to 10 weight percent, (b) an anionic, cationic, nonionic or amphoteric surfaceactive agent, or a mixture thereof, present in an amount ranging from 0.1 to 50 weight percent, (c) a thickening agent present in an amount ranging from 0.1 to 5 weight percent, (d) a perfume, (e) a sequestering agent, (f) a film-forming agent, (g) a dispersing agent, (h) a preservative, (i) an opacifier and (j) an agent for swelling said keratinous fibers.

Claim 16

The process of claim 1 wherein said keratinous fibers are human hair.

Claim 17

A keratinous fiber multicompartment dyeing kit comprising one first compartment containing a composition comprising, in an appropriate medium for dyeing, 5,6-dihydroxyindole, present in an amount ranging from 0.01 to 5 percent by weight based on the total weight of said composition, and iodide ions, present in an amount ranging from 0.007 to 4 percent by weight, expressed as I - ions, based on the total weight of said composition, a second compartment containing a composition comprising, in an appropriate medium for dyeing, hydrogen peroxide at a concentration ranging from 1 to 40 volumes, and a third compartment containing an aqueous medium at an alkaline pH, the contents of said third compartment intended to be mixed with the contents of said second compartment just before dyeing said keratinous fibres.

Claim 18

A keratinous fiber multicompartment dyeing kit comprising one first compartment containing a composition comprising, in an appropriate medium for dyeing, 5,6-dihydroxyindole, present in an amount ranging from 0.01 to 5 percent by weight based on the total weight of said composition, and iodide ions, present in an amount ranging from 0.007 to 4 percent by weight, expressed as I - ions, based on the total weight of said composition, a second compartment containing a composition comprising, in an appropriate medium for dyeing, hydrogen peroxide at a concentration ranging from 1 to 40 volumes, and a third compartment containing an aqueous medium at an alkaline pH, the contents of said third compartment intended to be mixed with the contents of said second compartment just before dyeing said keratinous fibres.

Claim 19

The keratinous fiber dyeing kit of claim 16 wherein said third compartment also contains an oxidation dye selected from the group consisting of a paraphenylene diamine, a para-aminophenol, a para-diphenol, an ortho-aminophenol, an ortho-phenylenediamine, an ortho-diphenol and a heterocyclic derivative.

Claim 20

The keratinous fiber dyeing kit of claim 16 which also includes a fourth compartment containing an oxidation dye in an appropriate medium for dyeing, the contents of said fourth compartment intended to be mixed with the contents of said third compartment and with the contents of said second compartment just before dyeing said keratinous fibers.

Claim 21

A keratinous fiber multicompartment dyeing kit comprising a first compartment containing a composition comprising in an appropriate medium for dyeing, iodide ions, present in an amount ranging form 0.007 to 4 percent by weight, expressed as I - ions, based on the total weight of said composition, a second compartment containing a composition comprising, in an appropriate medium for dyeing, 5,6-dihydroxyindole present in an amount ranging from 0.01 to 5 percent by weight based on the total weight of said composition, a third compartment containing a composition comprising, in an appropriate medium for dyeing, hydrogen peroxide at a concentration ranging from 1 to 40 volumes, and a fourth compartment containing an aqueous alkaline medium at a pH less than 12. the contents of said fourth compartment intended to be mixed with the contents of said third compartment, and the contents of said second compartment intended to be mixed with the contents of said first compartment, just before dyeing said keratinous fibers.

Claim 22

A keratinous fiber multicompartment dyeing kit comprising a first compartment containing a composition comprising in an appropriate medium for dyeing, iodide ions, present in an amount ranging form 0.007 to 4 percent by weight, expressed as I - ions, based on the total weight of said composition, a second compartment containing a composition comprising, in an appropriate medium for dyeing, 5,6-dihydroxyindole present in an amount ranging from 0.01 to 5 percent by weight based on the total weight of said composition, a third compartment containing a composition comprising, in an appropriate medium for dyeing, hydrogen peroxide at a concentration ranging from 1 to 40 volumes, and a fourth compartment containing an aqueous alkaline medium at a pH less than 12. the contents of said fourth compartment intended to be mixed with the contents of said third compartment, and the contents of said second compartment intended to be mixed with the contents of said first compartment, just before dyeing said keratinous fibers.