ANHYDROUS SOLID COMPOSITION FOR DYEING KERATIN FIBRES COMPRISING A METABISULFITE

Abstract

The present invention relates to an anhydrous solid composition for dyeing keratin fibres, in particular human keratin fibres such as the hair, comprising one or more metabisulfites. The present invention also relates to a packaging article containing said composition. The present invention also relates to processes for dyeing keratin fibres using said composition or said packaging article. Finally, the present invention also relates to the use of said composition or of said packaging article for dyeing keratin fibres, and in particular human keratin fibres such as the hair.

Claims

1. An anhydrous solid composition for dyeing keratin fibres comprising: one or more oxidation bases, one or more metabisulfites, and optionally one or more oxidation couplers.

2. The composition according to claim 1, characterized in that the oxidation base(s) are chosen from para-phenylenediamines, bis(phenyl) alkylenediamines, para-aminophenols, bis-para-aminophenols, ortho-aminophenols and heterocyclic bases, the addition salts thereof, the solvates thereof, and mixtures thereof.

3. The composition according to claim 2, characterized in that the oxidation base(s) are chosen from para-phenylenediamines, para-aminophenols, the addition salts thereof, the solvates thereof, and mixtures thereof.

4. The composition according to claim 1, wherein the total amount of oxidation base(s) ranges from 0.1% to 45% by weight relative to the total weight of the anhydrous solid dyeing composition.

5. The composition according to claim 1, wherein the metabisulfite(s) are chosen from alkali metal or alkaline-earth metal metabisulfites and mixtures thereof.

6. The composition according to claim 1, wherein the total amount of metabisulfite(s) ranges from 0.1% to 30% by weight relative to the total weight of the anhydrous solid dyeing composition.

7. The composition according to claim 1, wherein the oxidation coupler(s) are chosen from meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based couplers and heterocyclic couplers, the addition salts thereof, the solvates thereof, and mixtures thereof.

8. The composition according to claim 7, characterized in that the oxidation coupler(s) are chosen from meta-phenylenediamines, meta-aminophenols, the addition salts thereof, the solvates thereof, and mixtures thereof.

9. The composition according to claim 1, wherein the total amount of oxidation coupler(s) ranges from 0.1% to 45% by weight relative to the total weight of the anhydrous solid dyeing composition.

10. The composition according to claim 1, which also comprises one or more surfactants.

11. The composition according to claim 1, which also comprises one or more alkaline agents.

12. A ready-to-use composition comprising an anhydrous solid dyeing composition, as claimed in claim 1, one or more chemical oxidizing agents, and optionally a cosmetically acceptable medium.

13. The composition according to claim 12, characterized in that the chemical oxidizing agent(s) are chosen from (i) peroxygenated salts and precursors thereof; (ii) percarbonates of alkali metals or alkaline-earth metals; (iii) alkali metal bromates or ferricyanides, (iv) solid hydrogen peroxide-generating chemical oxidizing agents; (v) oxidases that produce hydrogen peroxide in the presence of a suitable substrate; and (vi) mixtures thereof.

14. A packaging article comprising: i) an envelope defining at least one cavity, the envelope comprising water-soluble and/or liposoluble fibres, preferably water-soluble fibres; and ii) an anhydrous solid dyeing composition as defined according to claim 1; it being understood that the anhydrous solid dyeing composition is in one of the cavities defined by the envelope i).

15. The packaging article according to claim 14, characterized in that it comprises a first cavity containing the anhydrous solid dyeing composition and no chemical oxidizing agent, and a second cavity containing one or more chemical oxidizing agents.

16. The packaging article according to claim 14, characterized in that it comprises a cavity containing the anhydrous solid dyeing composition, said composition also comprising one or more chemical oxidizing agents.

17. The packaging article according to claim 14, wherein the envelope i) consists of two water-soluble or liposoluble sheets joined together at a peripheral region, the two sheets being joined by any suitable fixing means; the first sheet also has a free central region arranged facing a free central region of the second sheet; these two central regions defining a central cavity, said central cavity containing the anhydrous solid dyeing composition; the sheets have a closed outer periphery of which the shape is rounded.

18. The packaging article according to claim 17, which also comprises a sheet, and optionally other additional water-soluble or liposoluble sheet(s) which define one or more cavities, separating the anhydrous solid dyeing composition, one or more chemical oxidizing agents, or an oxidizing composition and/or one or more additives.

19. The packaging article according to claim 17, wherein the first sheet, the second sheet and optionally the additional sheets have a thickness smaller than their other dimensions.

20. The packaging article according to claim 17, wherein the first sheet is a nonwoven and the second sheet is a nonwoven; and said article also has a closed outer periphery; the outer periphery of the first layer is identical in shape to the outer periphery of the second layer.

21. A process for dyeing keratin fibres comprising the following successive steps: applying to said keratin fibres a ready-to-use composition as claimed in claim 12, leaving the ready-to-use composition on said keratin fibres, rinsing said keratin fibres, and optionally shampooing said keratin fibres, rinsing them and drying them.

22. A process for dyeing keratin fibres comprising the following successive steps: mixing a packaging article, as claimed in claim 14, with a composition capable of dissolving the envelope of said packaging article, and optionally one or more chemical oxidizing agents, applying the resulting composition to said keratin fibres, leaving said resulting composition on said keratin fibres, rinsing said keratin fibres, and optionally shampooing said keratin fibres, rinsing them and drying them.

23. A process for dyeing human hair comprising applying to said hair the composition as claimed in claim 12.

24. The process as defined in claim 21 wherein the keratin fibres are human hair.

Description

EXAMPLES

[0439] In the examples which follow, all the amounts are shown as percentage by weight of active material, relative to the total weight of the composition.

A. Example 1

I. Preparation of the Compositions

[0440] 1.1. Dyeing Compositions

[0441] The dyeing composition (A), according to the invention, and the comparative dyeing compositions (A1) to (A7) that follow, in anhydrous powder form, were prepared from the ingredients of which the contents are indicated in the tables below (% in g of active material).

TABLE-US-00001 A1 A2 A3 A compar- compar- compar- invention ative ative ative 2,5-Toluenediamine 29.39 29.39 29.39 29.39 sulfate 2-methyl-5- 22.30 22.30 22.30 22.30 hydroxyethylaminophenol Ammonium sulfate 30.30 30.30 30.30 30.30 Ammonium lauryl sulfate 6.06 6.06 6.06 6.06 Sodium metabisulfite 7.57 Sodium thiosulfate 7.57 Cystine 7.57 Sorbitol qs 100 qs 100 qs 100 qs 100

TABLE-US-00002 A4 A5 A6 A7 compar- compar- compar- compar- ative ative ative ative 2,5-Toluenediamine 29.39 29.39 29.39 29.39 sulfate 2-methyl-5- 22.30 22.30 22.30 22.30 hydroxyethylaminophenol Ammonium sulfate 30.30 30.30 30.30 30.30 Ammonium lauryl sulfate 6.06 6.06 6.06 6.06 Ascorbic acid 7.57 Sodium sulfite 7.57 Cysteine 7.57 Glutathione 7.57 Sorbitol qs 100 qs 100 qs 100 qs 100

[0442] 1.2. Oxidizing Composition

[0443] The oxidizing composition (C) was prepared from the ingredients of which the contents are indicated in the table below (% in g of active material).

TABLE-US-00003 C Sodium percarbonate 42.28 Microcrystalline cellulose 24.63 Sorbitol 18.38 Hydroxypropyl starch phosphate 14.71

II. Evaluation of the Stability of the Dyeing Compositions (Dyeing Quality)

[0444] 2.1. Protocol

[0445] The dyeing quality (DQ) of each of the dyeing compositions, according to the invention (A) and comparative compositions (A1) to (A7), was evaluated. The term dyeing quality is intended to mean the stability over time of the colour of each of the dyeing compositions thus obtained.

[0446] The dyeing quality was measured using a Minolta CM-3600D spectrocolorimeter in the CIE L*a*b* system for each of the compositions thus obtained.

[0447] at t.sub.0, that is to say just after the preparation of the composition in question, and

[0448] at t.sub.1 month, after storage of each of these compositions for 1 month at 45 C.

[0449] The colorimetric measurements were carried out on the compositions in powder form, packaged in transparent containers.

[0450] The difference in dyeing quality (DQ), that is to say the difference in colour, was then calculated for each of the dyeing compositions according to the following equation:

DQ={square root over ((L*L.sub.o*).sup.2+(a*a.sub.o*).sup.2+(b*b.sub.o*).sup.2)}

[0451] The three parameters respectively denote the intensity of the colour (L*), the green/red colour axis (a*) and the blue/yellow colour axis (b*). The L*, a* and b* values are those measured on the compositions at t.sub.1 month after one month of storage at 45 C. and the L.sub.0*, a.sub.0* and b.sub.0* values are measured on the compositions at to.

[0452] The higher the (DQ) value, that is to say the higher the difference in colour, the more the dyeing composition has oxidized and the more degraded is its dyeing quality. In other words, the greater the difference, the less stable the composition is over time, and the lower the (DQ) value, the more stable is the composition.

[0453] 2.2. Results

[0454] The differences in dyeing quality that are obtained for each of the dyeing compositions, according to the invention (A) and comparative compositions (A1) to (A7), are indicated in the table below.

TABLE-US-00004 A A1 A2 A3 A4 A5 A6 A7 DQ 28.11 46.00 41.10 46.00 37.47 47.83 46.76 36.28

[0455] The results obtained above show that the dyeing composition (A), prepared according to the present invention, i.e. comprising sodium metabisulfite, is more stable over time than the comparative composition (A1) not comprising sodium metabisulfite.

[0456] The composition according to the present invention is also more stable over time than the comparative compositions (A2) to (A7) comprising a reducing agent other than sodium metabisulfite.

[0457] After one month of storage at 45 C., the composition according to the invention is less oxidized than the comparative compositions, and thus retains a better dyeing quality.

III. Dyeing Evaluation of the Dyeing Compositions

[0458] 3.1. Protocol

[0459] Each of the dyeing compositions (A) to (A3), (A5) and (A6), obtained previously, was mixed with the oxidizing composition (C) so as to obtain six ready-to-use compositions (A+C) to (A3+C), (A5+C) and (A6+C) comprising:

[0460] 3.3 g of dyeing composition,

[0461] 27.2 g of oxidizing composition (C), and

[0462] water qs 100 g.

[0463] The ready-to-use compositions thus obtained were applied to locks of hair containing 90% grey hairs, in a bath ratio equal to 5. After a leave-on time of 30 minutes at 27 C. (thermostated plate), the locks of hair were rinsed and then dried.

[0464] The same protocol was applied using dyeing compositions (A) to (A3), (A5) and (A6) previously stored for 2 months at 45 C.

[0465] The colorimetric measurements of each of the ready-to-use compositions were evaluated in the CIE L*a*b* system by means of a Minolta CM-3600D spectrocolorimeter.

[0466] In this L*a*b* system, L* represents the intensity of the colour, a* indicates the green/red colour axis and b* the blue/yellow colour axis.

[0467] The E* value was calculated from the L*a*b* values according to the following equation:

E*={square root over ((L*L.sub.o*).sup.2+(a*a.sub.o*).sup.2+(b*b.sub.o*).sup.2)}

[0468] The colour build-up (E*) was calculated on locks of untreated hair (L.sub.0*, a.sub.0* and b.sub.0*) and on locks of dyed hair (L*, a* and b*). The higher the E* value, the better is the build-up of the colour.

[0469] Then, the stability of the dyeing performance qualities (diffE), that is to say the change in the dyeing performance qualities, of the dyeing compositions (A) to (A3), (A5) and (A6) was calculated by comparing the build-up of the colouring obtained using fresh dyeing compositions, i.e. applied directly after they have been prepared, (E*(t.sub.0)), with the build-up of the colouring obtained using dyeing compositions stored for 2 months at 45 C. (E*(t.sub.2 months)) according to the following equation:

diff E=(E*(t.sub.0))(E*(t.sub.2 months))

[0470] The higher the diffE value, the more the dyeing performance qualities of the dyeing composition have been degraded.

[0471] 3.2. Results

[0472] The diffE values obtained for each of the dyeing compositions, according to the invention (A) and comparative compositions (A1) to (A3), (A5) and (A6), are indicated in the table below.

TABLE-US-00005 A A1 A2 A3 A5 A6 diff E 1.4 11.0 7.7 6.5 5.3 3.4

[0473] The results obtained above show that the dyeing properties of the dyeing composition (A), prepared according to the present invention, i.e. comprising sodium metabisulfite, remain more stable over time than the dyeing properties provided by the comparative composition not comprising sodium metabisulfite (A1).

[0474] The dyeing properties of the composition according to the invention are also more stable over time than those obtained with the comparative compositions (A2), (A3), (A5) and (A6) comprising a reducing agent other than sodium metabisulfite.

[0475] Even after 2 months of storage at 45 C., the composition according to the invention retains its dyeing properties, contrary to the comparative compositions.

B. Example 2

I. Preparation of the Compositions

[0476] 1.1. Dyeing Compositions

[0477] The dyeing composition (B), according to the invention, and the comparative dyeing compositions (B1) to (B7) that follow, in anhydrous powder form, were prepared from the ingredients of which the contents are indicated in the tables below (% in g of active material).

TABLE-US-00006 B1 B2 B3 B compar- compar- compar- invention ative ative ative 1-hydroxy-4- 14.55 14.55 14.55 14.55 aminobenzene 2,4-diamino- 32.15 32.15 32.15 32.15 phenoxyethanol HCl Ammonium sulfate 30.30 30.30 30.30 30.30 Ammonium lauryl sulfate 6.06 6.06 6.06 6.06 Sodium metabisulfite 7.57 Sodium thiosulfate 7.57 Cystine 7.57 Sorbitol qs 100 qs 100 qs 100 qs 100

TABLE-US-00007 B4 B5 B6 B7 compar- compar- compar- compar- ative ative ative ative 1-hydroxy-4- 14.55 14.55 14.55 14.55 aminobenzene 2,4- 32.15 32.15 32.15 32.15 diaminophenoxyethanol HCl Ammonium sulfate 30.30 30.30 30.30 30.30 Ammonium lauryl sulfate 6.06 6.06 6.06 6.06 Ascorbic acid 7.57 Sodium sulfite 7.57 Cysteine 7.57 Glutathione 7.57 Sorbitol qs 100 qs 100 qs 100 qs 100

[0478] 1.2. Oxidizing Composition

[0479] The oxidizing composition (C) was prepared from the ingredients of which the contents are indicated in the table below (% in g of active material).

TABLE-US-00008 C Sodium percarbonate 42.28 Microcrystalline cellulose 24.63 Sorbitol 18.38 Hydroxypropyl starch phosphate 14.71

II. Evaluation of the Stability of the Dyeing Compositions

[0480] 2.1. Protocol

[0481] The dyeing quality (DQ) of each of the dyeing compositions, according to the invention (B) and comparative compositions (B1) to (B7), was evaluated. The term dyeing quality is intended to mean the stability over time of the colour of each of the dyeing compositions thus obtained.

[0482] The dyeing quality was measured using a Minolta CM-3600D spectrocolorimeter in the CIE L*a*b* system for each of the compositions thus obtained.

[0483] at t.sub.0, that is to say just after the preparation of the composition in question, and

[0484] at t.sub.1 month, after storage of each of these compositions for 1 month at 45 C.

[0485] The colorimetric measurements were carried out on the compositions in powder form, packaged in transparent containers.

[0486] The difference in dyeing quality (DQ), that is to say the difference in colour, was then calculated for each of the dyeing compositions according to the following equation:

DQ={square root over ((L*L.sub.o*).sup.2+(a*a.sub.o*).sup.2+(b*b.sub.o*).sup.2)}

[0487] The three parameters respectively denote the intensity of the colour (L*), the green/red colour axis (a*) and the blue/yellow colour axis (b*). The L*, a* and b* values are those measured on the compositions at t.sub.1 month after one month of storage at 45 C. and the L.sub.0*, a.sub.0* and b.sub.0* values are measured on the compositions at to.

[0488] The higher the (DQ) value, that is to say the higher the difference in colour, the more the dyeing composition has oxidized and the more degraded is its dyeing quality. In other words, the greater the difference, the less stable the composition is over time, and the lower the (DQ) value, the more stable is the composition.

[0489] 2.2. Results

[0490] The differences in dyeing quality that are obtained for each of the dyeing compositions, according to the invention (B) and comparative compositions (B1) to (B7), are indicated in the table below.

TABLE-US-00009 B B1 B2 B3 B4 B5 B6 B7 DQ 30.22 47.13 56.57 56.03 50.39 51.56 52.35 56.07

[0491] The results obtained above show that the dyeing composition (B), prepared according to the present invention, i.e. comprising sodium metabisulfite, is more stable over time than the comparative composition (B1) not comprising sodium metabisulfite.

[0492] The composition according to the present invention is also more stable over time than the comparative compositions (B2) to (B7) comprising a reducing agent other than sodium metabisulfite.

[0493] After one month of storage at 45 C., the composition according to the invention is less oxidized than the comparative compositions, and thus retains a better dyeing quality.

III. Dyeing Evaluation of the Dyeing Compositions

[0494] 3.1. Protocol

[0495] Each of the dyeing compositions (B) to (B4) and (B6), obtained previously, was mixed with the oxidizing composition (C) so as to obtain six ready-to-use compositions (B+C) to (B4+C) and (B6+C) comprising:

[0496] 3.3 g of dyeing composition,

[0497] 27.2 g of oxidizing composition (C), and

[0498] water qs 100 g.

[0499] The ready-to-use compositions thus obtained were then applied to locks of hair containing 90% grey hairs, in a bath ratio equal to 5. After a leave-on time of 30 minutes at 27 C. (thermostated plate), the locks of hair were rinsed and then dried.

[0500] The same protocol was applied using dyeing compositions (B) to (B6) previously stored for 2 months at 45 C.

[0501] The colorimetric measurements of each of the ready-to-use compositions were evaluated in the CIE L*a*b* system by means of a Minolta CM-3600D spectrocolorimeter.

[0502] The stability of the dyeing performance qualities (diffE) of the dyeing compositions (B) to (B4) and (B6) was calculated by comparing the build-up of the colouring obtained using fresh dyeing compositions, i.e. applied directly after they have been prepared, (E*(to)), with the build-up of the colouring obtained using dyeing compositions stored for 2 months at 45 C. (E*(t.sub.2 months)) according to the following equation:

diff E=(E*(t.sub.0))(E*(t.sub.2 months))

[0503] The higher the diff E value, the more the dyeing performance qualities of the dyeing composition have been degraded.

[0504] 3.2. Results

[0505] The E values obtained for each of the dyeing compositions, according to the invention (B) and comparative compositions (B1) to (B4) and (B6), are indicated in the table below.

TABLE-US-00010 B B1 B2 B3 B4 B6 diff E 0.36 10.65 5.34 4.32 5.21 15.10

[0506] The results obtained above show that the dyeing properties of the dyeing composition (B), prepared according to the present invention, i.e. comprising sodium metabisulfite, remain more stable over time than the dyeing properties provided by the comparative composition not comprising sodium metabisulfite (B1).

[0507] The dyeing properties of the composition according to the invention are also more stable over time than those obtained with the comparative compositions (B2) to (B4) and (B6) comprising a reducing agent other than sodium metabisulfite.

[0508] Even after 2 months of storage at 45 C., the composition according to the invention retains its dyeing properties, contrary to the comparative compositions.