COMPOSITION COMPRISING A NATURAL DYE, A TRIARYLMETHANE DIRECT DYE AND AN AROMATIC COMPOUND

Abstract

The present invention relates to a composition for dyeing human keratin fibers, comprising at least one natural dye, at least one triarylmethane synthetic direct dye and at least one compound of formula (I), in which Y represents a C.sub.1-C.sub.4 hydroxyalkyl group or a C.sub.1-C.sub.4 hydroxyalkyloxy radical, n denotes an integer ranging from 0 to 5, and X, which may be identical or different, represents a C.sub.1-C.sub.4 alkyl radical or a halogen. The invention also relates to a process for dyeing human keratin fibers using this composition.

##STR00001##

Claims

1-16. (canceled)

17. A composition for dyeing human keratin fibers, comprising: at least one natural dye; at least one triarylmethane synthetic direct dye; and at least one aromatic compound of formula (I), ##STR00010## wherein: Y represents a C.sub.1-C.sub.4 hydroxyalkyl group or a C.sub.1-C.sub.4 hydroxyalkyloxy radical, n denotes an integer ranging from 0 to 5, and X, which may be identical or different, represents a C.sub.1-C.sub.4 alkyl radical or a halogen.

18. The composition of claim 17, wherein the at least one natural dye is chosen from lawsone, henna extracts, henna powders, Cassia angustifolia extracts, Cassia angustifolia powders, indigo, indigo-producing plant extracts, indigo-producing plant powders, or mixtures thereof.

19. The composition of claim 17, wherein the total amount of the at least one natural dye ranges from 40% to 98% by weight, relative to the total weight of the composition.

20. The composition of claim 17, wherein the at least one triarylmethane synthetic direct dye is chosen from the cationic dyes of formulae (IIa.sub.1) and (IIa.sub.2) below, addition salts thereof with an organic or mineral acid or base, geometrical isomers thereof, optical isomers thereof, tautomers thereof, mesomeric forms thereof, solvates thereof, or mixtures thereof: ##STR00011## wherein: R1, R2, R3, and R4, which may be identical or different, represent a hydrogen atom or a group chosen from: (C.sub.1-C.sub.6)alkyl which is optionally substituted; aryl, aryl(C.sub.1-C.sub.4)alkyl, heteroaryl, heteroaryl(C.sub.1-C.sub.4)alkyl, or alternatively two groups R1 and R2, and/or R3 and R4, borne by the same nitrogen atom form, together with the nitrogen atom which bears them, an optionally substituted heterocycloalkyl group; R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, and R16, which may be identical or different, represent a hydrogen atom, halogen atom, or a group chosen from: i) hydroxyl; ii) thiol; iii) amino; iv) (di)(C.sub.1-C.sub.4)(alkyl)amino; v) (di)arylamino; vi) nitro; vii) acylamino (—NR—C(O)R′) in which the radical R is chosen from a hydrogen atom or a C.sub.1-C.sub.4 alkyl radical optionally bearing at least one hydroxyl group, and the radical R′ is a C.sub.1-C.sub.2 alkyl radical; viii) carbamoyl ((R).sub.2N—C(O)—), wherein the radicals R, which may be identical or not, represent a hydrogen atom or a C.sub.1-C.sub.4 alkyl radical optionally bearing at least one hydroxyl group; ix) carboxylic acid or ester, (—O—C(O)R′) or (—C(O)OR′), in which the radical R′ is a hydrogen atom or C.sub.1-C.sub.4 alkyl optionally bearing at least one hydroxyl group, and the radical R′ is a C.sub.1-C.sub.2 alkyl radical; x) alkyl which is optionally substituted; xi) alkylsulfonylamino (R′SO.sub.2—NR—), wherein the radical R represents a hydrogen atom or a C.sub.1-C.sub.4 alkyl radical optionally bearing at least one hydroxyl group, and the radical R′ represents a C.sub.1-C.sub.4 alkyl radical or a phenyl radical; xii) aminosulfonyl ((R).sub.2N—SO.sub.2—), wherein the radicals R, which may be identical or not, represent a hydrogen atom or a C.sub.1-C.sub.4 alkyl radical optionally bearing at least one hydroxyl group; xiii) (C.sub.1-C.sub.4)alkoxy; and xiv) (C.sub.1-C.sub.4)alkylthio; or alternatively, two radicals borne by two contiguous carbon atoms R5 and R6, R7 and R8, R9 and R10, R11 and R12, R13 and R14, and/or R15 and R16 form, together with the carbon atoms which bear them, a fused 6-membered aryl or heteroaryl ring, wherein said ring may be optionally substituted; and Q.sup.− represents an anionic counterion to achieve electrical neutrality.

21. The composition of claim 20, wherein in formulae (IIa.sub.1) and (IIa.sub.2), R1, R2, R3, and R4, which may be identical or different, represent a hydrogen atom or a (C.sub.1-C.sub.4)alkyl group.

22. The composition of claim 20, wherein Q.sup.− represents an halide or phosphate.

23. The composition of claim 17, wherein the at least one triarylmethane synthetic direct dye is chosen from Basic Violet 1, Basic Violet 2, Basic Violet 3, Basic Violet 4, Basic Violet 14, Basic Blue 1, Basic Blue 7, Basic Blue 26, Basic green 1, HC Blue 15, or mixtures thereof.

24. The composition of claim 17, wherein the total amount of the at least one triarylmethane synthetic direct dye ranges from 0.01% to 20% by weight, relative to the total weight of the composition.

25. The composition of claim 17, wherein the at least one aromatic compound of formula (I) is chosen from benzyl alcohol, phenylethanol, phenoxyethanol, or mixtures thereof.

26. The composition of claim 17, wherein the at least one aromatic compound of formula (I) comprises benzyl alcohol.

27. The composition of claim 17, wherein the total amount of the at least one aromatic compound of formula (I) ranges from 0.1% to 20% by weight, relative to the weight of the composition.

28. The composition of claim 17, further comprising at least one additional synthetic direct dye.

29. The composition of claim 28, wherein the at least one additional synthetic direct dye is chosen from azo dyes, hydrazono dyes, nitro(hetero)aryl dyes, or mixtures thereof.

30. The composition of claim 28, wherein the total amount of the at least one additional synthetic direct dye ranges from 0.01% to 15% by weight, relative to the total weight of the composition.

31. The composition of claim 17, further comprising at least one oil.

32. The composition of claim 31, wherein the total amount of the at least one oil ranges from 0.1% to 20% by weight, relative to the total weight of the composition.

33. The composition of claim 17, further comprising at least one (poly)saccharide.

34. The composition of claim 33, wherein the total amount of the at least one (poly)saccharide ranges from 0.05% to 10% by weight, relative to the total weight of the composition.

35. A process for dyeing keratin fibers comprising: applying to the keratin fibers a composition comprising: at least one natural dye; at least one triarylmethane synthetic direct dye; and at least one aromatic compound of formula (I), ##STR00012## wherein: Y represents a C.sub.1-C.sub.4 hydroxyalkyl group or a C.sub.1-C.sub.4 hydroxyalkyloxy radical, n denotes an integer ranging from 0 to 5, and X, which may be identical or different, represents a C.sub.1-C.sub.4 alkyl radical or a halogen.

36. A process for dyeing keratin fibers, comprising: applying to the keratin fibers a composition resulting from extemporaneous mixing at the time of use a composition (A) and an aqueous composition (B), at a mixing ratio of the composition (A) to the aqueous composition (B) ranging from 0.01 to 10.

Description

EXAMPLES

Comparative Tests 1

[0249] Compositions A and B were prepared. The proportions of the ingredients are indicated as grams of active material per 100 grams of composition.

[0250] —Composition According to the Invention and Comparative Composition:

TABLE-US-00001 TABLE 1 A B Ingredients (inv) (comp) Cassia angustifolia leaf powder, 84.9 84.9 sold by the company Kankor Basic Violet 2 4 HC Blue 2 4 Coconut oil 2.5 2.5 Xanthan gum 0.6 0.6 Benzyl alcohol 8 8

[0251] Composition B comprises a blue dye which is not a triarylmethane synthetic direct dye but a nitrobenzene dye.

[0252] At the time of use, each of the dye compositions A and B is mixed with three times its own weight of water at 100° C.

[0253] Each of the mixtures is then applied to locks of natural hair containing 90% white hairs, at a rate of 10 g of mixture per 1 g of hair.

[0254] After leaving it on plates thermostatically maintained at 33° C. for 30 minutes, the hair is rinsed and dried.

[0255] —Evaluation of the Coloring

[0256] The coloring of the hair is evaluated in the L*a*b* system, using a Minolta CM 3600D spectrocolorimeter (illuminant D65, angle 10°, specular component included).

[0257] In this system, L* represents the lightness. The smaller the value of L*, the darker and more powerful the coloring obtained. The chromaticity is measured by the values a* and b*, a* representing the red/green axis and b* the yellow/blue axis.

[0258] The color buildup is represented by the color difference A E between the undyed lock and the dyed lock: the greater the value of A E, the greater the color buildup. This value is calculated from the following equation (i):

ΔE=√{square root over ((L*−L.sub.o*).sup.2+(a*−a.sub.o*).sup.2+(b*−b.sub.o*).sup.2)}  (i)

[0259] In the equation (i), L*, a* and b* represent the values measured on locks of undyed hair and L.sub.0*, a.sub.0* and b.sub.0* represent the values measured on locks of dyed hair.

[0260] —Dyeing Results

[0261] The colorimetric values and the color buildup A E are listed in the table below:

[0262] Better color buildup was obtained on the locks of hair treated using the composition according to the invention, which is confirmed by the colorimetric measurements below.

TABLE-US-00002 TABLE 2 Composition a* b* ΔE before dyeing 1.26 12.76 — Composition A (inv) 38.37 −8.38 51.05 Composition B 7.40 −11.23 36.19

[0263] The above results show that better color buildup and more powerful coloring were obtained using composition A according to the invention, relative to comparative composition B not comprising a triarylmethane synthetic direct dye.

[0264] Comparative Tests 2:

TABLE-US-00003 TABLE 3 C D E Ingredients (inv) (comp) (comp) Cassia angustifolia leaf 88.2 88.2 88.2 powder, sold by the company Kankor HC Blue 15 0.3 0.3 0.3 Basic Red 51 1 1 1 Coconut oil 2.5 2.5 2.5 Benzyl alcohol 8 Ethanol 8 Propylene glycol 8

[0265] Compositions D and E do not contain any aromatic compound of formula (I).

[0266] At the time of use, each of the dye compositions C, D and E is mixed with three times its weight of water at 100° C.

[0267] Each of the mixtures is then applied to locks of natural hair containing 90% white hairs, at a rate of 10 g of mixture per 1 g of hair.

[0268] After leaving it on plates thermostatically maintained at 33° C. for 30 minutes, the hair is rinsed and dried.

[0269] The dyeing performance is evaluated in the same manner as previously.

[0270] The results obtained are as follows:

TABLE-US-00004 TABLE 4 Composition a* b* ΔE before dyeing 2.18 16.48 — Composition C (inv) 20.04 −5.76 40.13 Composition D 19.20 −4.47 35.17 Composition E 21.10 −5.49 36.27

[0271] Composition C according to the invention results in better color buildup and in more powerful coloring, relative to comparative compositions D and E.