ANHYDROUS SOLID COMPOSITION FOR DYEING KERATIN FIBRES COMPRISING A POLYMER COMPRISING AT LEAST ONE HETEROCYCLIC VINYL MONOMER

Abstract

The present invention relates to an anhydrous solid composition for dyeing keratin fibres, in particular human keratin fibres such as the hair, comprising a particular chemical oxidizing agent and a polymer comprising at least one heterocyclic vinyl monomer. 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 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: (a) one or more oxidation bases, (b) one or more chemical oxidizing agents chosen from alkali metal percarbonates, alkaline- earth metal percarbonates and mixtures thereof, (c) one or more polymers comprising at least one heterocyclic vinyl monomer, and (d) 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 1, wherein the total amount of oxidation base(s) ranges from 0.1% to 30% by weight relative to the total weight of the anhydrous solid dyeing composition.

4. The composition according to claim 1, wherein the total amount of chemical oxidizing agent(s), chosen from alkali metal percarbonates, alkaline-earth metal percarbonates and mixtures thereof, ranges from 30% to 55% by weight relative to the total weight of the anhydrous solid dyeing composition.

5. The composition according to claim 1, wherein the heterocyclic vinyl monomer is chosen from monomers comprising a 4- to 7-membered heterocycle, and comprising from 1 to 4 identical or different intracyclic heteroatoms, which is optionally fused to a benzene ring and/or optionally substituted; the number of intracyclic heteroatoms being less than the number of ring members of the heterocycle.

6. The composition according to claim 5, characterized in that the heterocyclic vinyl monomer is chosen from optionally substituted N-vinyl monomers, preferably from N-vinylpyrrolidone, vinylcaprolactam, N-vinylpiperidone, N-vinyl 3-morpholine, N-vinyl-4-oxazolinone, 2-vinylpyridine, 4-vinylpyridine, 2-vinylquinoline, 1-vinylimidazole and 1-vinylcarbazole, which are optionally substituted.

7. The composition according to claim 1, wherein the polymer comprising at least one heterocyclic vinyl monomer is the crosslinked or non-crosslinked polyvinylpyrrolidone homopolymer.

8. The composition according to claim 1, wherein the total amount of polymer(s) comprising at least one heterocyclic vinyl monomer ranges from 5% to 70% by weight relative to the total weight of the anhydrous solid dyeing composition.

9. 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.

10. The composition according to claim 1, wherein it 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 resulting from the mixing of an anhydrous solid dyeing composition, as defined in claim 1, and of a cosmetically acceptable medium.

13. 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 in claim 1; it being understood that the anhydrous solid dyeing composition is in one of the cavities defined by the envelope i).

14. The packaging article according to claim 13, wherein the envelope i) is constituted of two water-soluble or liposoluble sheets joined together at a peripheral region, the two sheets preferably 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 having a closed outer periphery of which the shape is rounded.

15. The packaging article according to claim 14, which also comprises a sheet and optionally other additional water-soluble or liposoluble sheet(s), which are preferably water-soluble, which define one or more cavities, separating the anhydrous solid dyeing composition, one or more additional chemical oxidizing agents which are different from the chemical oxidizing agents and/or one or more additives, and/or one or more additives which are different from those introduced into the other cavities.

16. The packaging article according to claim 14, wherein the first sheet, the second sheet and optionally the additional sheets have a thickness smaller than their other dimensions.

17. The packaging article according to claim 14, wherein the first sheet is a nonwoven and the second sheet is a nonwoven; 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.

18. A process for dyeing keratin fibres comprising the following successive steps: applying to said keratin fibres a ready-to-use composition as defined 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.

19. The process for dyeing keratin fibres comprising the following successive steps: a packaging article, as defined in claim 13, with a composition capable of dissolving the envelope of said packaging article, 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.

20. A process for dyeing human hair comprising applying to said hair the anhydrous solid dyeing composition, as defined in claim 1.

21. The process as defined in claim 19 wherein the keratin fibres are human hair.

Description

EXAMPLES

[0341] 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

[0342] I. Preparation of the compositions

[0343] The dyeing composition (A), according to the invention, and the comparative dyeing compositions (A1) and (A2) 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 A A1 A2 invention comparative comparative 2,5-Toluenediamine sulfate 2 2 2 2,4-Diaminophenoxyethanol, 0.029 0.029 0.029 HCl Resorcinol 1 1 1 m-Aminophenol 0.2 0.2 0.2 Sodium percarbonate 42.2 42.2 42.2 Ammonium sulfate 3.6 3.6 3.6 Hydroxypropyl starch phosphate 14.5 14.5 14.5 Sodium metabisulfite 0.4 0.4 0.4 Polyvinylpyrrolidone 17.4 Cyclodextrin 17.4 Sorbitol 17.4 Microcrystalline cellulose 17.7 17.7 17.7 Sodium lauryl sulfate 0.7 0.7 0.7

II. Evaluation of the Stability of the Dyeing Compositions

[0344] 2.1. Protocol

[0345] After storage for one month at 45 C., each of the compositions (A) to (A2) was mixed with water.

[0346] The stability of each of the compositions (A) to (A2) was then evaluated by measuring the percentage of H.sub.2O.sub.2 loss by oxidation-reduction titration with potassium permanganate.

[0347] 2.2. Results

[0348] The percentages of H.sub.2O.sub.2 loss obtained for each of the compositions, according to the invention (A) and comparative compositions (A1) and (A2), are indicated in the table below.

TABLE-US-00002 A A1 A2 invention comparative comparative % H.sub.2O.sub.2 loss 4% 21% 100%

[0349] The results obtained above show that the dyeing composition (A), prepared according to the present invention, i.e. comprising a polymer comprising at least one heterocyclic vinyl monomer (polyvinylpyrrolidone), is more stable over time than the comparative compositions (A1) and (A2) comprising other excipients.

[0350] Indeed, after storage for one month at 45 C., an H.sub.2O.sub.2 loss of only 4% is measured in the composition according to the invention.

[0351] Conversely, the comparative compositions (A1) and (A2) comprising an excipient other than polyvinylpyrrolidone have respectively lost 21% and 100% of H.sub.2O.sub.2.

III. Dyeing Evaluation of the Dyeing Compositions

[0352] 3.1. Protocol

[0353] Each of the compositions (A) to (A2) obtained previously was mixed with water in order to obtain the respective ready-to-use compositions (A) to (A2), according to the following proportions:

27.2 g of composition, and
water qs 100 g.

[0354] The ready-to-use compositions thus obtained were then applied to locks of hair containing 90% grey hairs, in a bath ratio equal to 5:1. After a leave-on time of 30 minutes at 27 C. (thermostated plate), the locks of hair were rinsed, shampooed and then dried.

[0355] The same protocol was applied using dyeing compositions (A) to (A2) stored for 1 month at 45 C.

[0356] 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.

[0357] 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.

[0358] 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)}

[0359] The colour build-up (E*) was calculated on locks of untreated hair (L0*, a0* and b0*) and on locks of dyed hair (L*, a* and b*). The higher the E* value, the better the build-up of the colour.

[0360] Then, the stability of the dyeing performance qualities (diffE), that is to say the change in the dyeing performance qualities, of the compositions (A) to (A2) 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(t0)), with the build-up of the colouring obtained using dyeing compositions stored for 1 month at 45 C. (E(t1month)) according to the following equation:

diffE=(E(t.sub.0))(E(t.sub.1 month))

[0361] The higher the diffE value, the more the dyeing performance qualities of the dyeing composition have been degraded.

[0362] 3.2. Results

[0363] The diffE values obtained for each of the dyeing compositions, according to the invention (A) and comparative compositions (A1) and (A2), are indicated in the table below.

TABLE-US-00003 A A1 A2 invention comparative comparative diff E 3.5 5.2 15.0

[0364] The results obtained above show that the dyeing properties of the dyeing composition (A), prepared according to the present invention, i.e. comprising a polymer comprising at least one heterocyclic vinyl monomer (polyvinylpyrrolidone), remain more stable over time than the dyeing properties provided by the comparative compositions (A1) and (A2), each comprising an excipient other than polyvinylpyrrolidone.

[0365] Even after one month 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

[0366] The dyeing composition (B), according to the invention, and the comparative dyeing compositions (B1) to (B3) 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-00004 B1 B2 B com- com- B3 invention parative parative comparative 2,5-Toluenediamine 3.53 3.53 3.53 3.53 sulfate 2,4- 0.12 0.12 0.12 0.12 Diaminophenoxyethanol, HCl Resorcinol 1.69 1.69 1.69 1.69 m-Aminophenol 0.34 0.34 0.34 0.34 Sodium percarbonate 44.89 44.89 44.89 44.89 Ammonium sulfate 3.68 3.68 3.68 3.68 Hydroxypropyl starch 14.71 14.71 14.71 14.71 phosphate Sodium metabisulfite 1.47 1.47 1.47 1.47 Polyvinylpyrrolidone 29.58 Talc 29.58 Cyclodextrin 29.58 Sodium sulfate 29.58

II. Evaluation of the Stability of the Dyeing Compositions

[0367] 2.1. Protocol

[0368] After storage for one month at 45 C., each of the compositions (B) to (B3) was mixed with water.

[0369] The stability of each of the compositions (B) to (B3) was then evaluated by measuring the percentage of H.sub.2O.sub.2 loss by oxidation-reduction titration with potassium permanganate.

[0370] 2.2. Results

[0371] The percentages of H.sub.2O.sub.2 loss obtained for each of the compositions, according to the invention (B) and comparative compositions (B1) to (B3), are indicated in the table below.

TABLE-US-00005 B B1 B2 B3 invention comparative comparative comparative % H.sub.2O.sub.2 loss 1.7% 39% 25% 38%

[0372] The results obtained above show that the dyeing composition (B), prepared according to the present invention, i.e. comprising a polymer comprising at least one heterocyclic vinyl monomer (polyvinylpyrrolidone), is more stable over time than the comparative compositions (B1) to (B3) comprising other excipients.

[0373] Indeed, after storage for one month at 45 C., an H.sub.2O.sub.2 loss of only 1.7% is measured in the composition according to the invention. Conversely, the comparative compositions (B1) to (B3) comprising an excipient other than polyvinylpyrrolidone have respectively lost 39%, 25% and 38% of H.sub.2O.sub.2.

III. Dyeing Evaluation of the Dyeing Compositions

[0374] 3.1. Protocol

[0375] Each of the compositions (B) to (B3) obtained previously was mixed with water in order to obtain the respective ready-to-use compositions (B)-(B3), according to the following proportions:

27.2 g of composition, and
water qs 100 g.

[0376] The ready-to-use compositions thus obtained were then applied to locks of hair containing 90% grey hairs, in a bath ratio equal to 5:1. After a leave-on time of 30 minutes at 27 C. (thermostated plate), the locks of hair were rinsed and then dried.

[0377] The same protocol was applied using dyeing compositions (B) to (B3) stored for 1 month at 45 C.

[0378] 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.

[0379] 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.

[0380] 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)}

[0381] The colour build-up (E*) was calculated on locks of untreated hair (L0*, a0* and b0*) and on locks of dyed hair (L*, a* and b*). The higher the E* value, the better the build-up of the colour.

[0382] Then, the stability of the dyeing performance qualities (diffE), that is to say the change in the dyeing performance qualities, of the compositions (B) to (B3) 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(t0)), with the build-up of the colouring obtained using dyeing compositions stored for 1 month at 45 C. (E(t1month)) according to the following equation:

diff E=(E*(t.sub.0))(E*(t.sub.1 month))

[0383] The higher the diffE value, the more the dyeing performance qualities of the dyeing composition have been degraded.

[0384] 3.2. Results

[0385] The diffE values obtained for each of the dyeing compositions, according to the invention (B) and comparative compositions (B1) to (B3), are indicated in the table below.

TABLE-US-00006 B B1 B2 B3 invention comparative comparative comparative diff E 1.80 17.07 14.75 17.91

[0386] The results obtained above show that the dyeing properties of the dyeing composition (B), prepared according to the present invention, i.e. comprising a polymer comprising at least one heterocyclic vinyl monomer (polyvinylpyrrolidone), remain more stable over time than the dyeing properties provided by the comparative compositions (B1) to (B3), each comprising an excipient other than polyvinylpyrrolidone.

[0387] Even after one month of storage at 45 C., the composition according to the invention retains its dyeing properties, contrary to the comparative compositions.