Hair dye composition comprising blue DYES, basic red or yellow DYES and a cationic surfactant

Abstract

To provide a hair dye composition that has a gray hair hiding effect and can suppress color tone changes due to continuous use. A hair dye composition, containing: (A) HC blue 16; (B) at least one dye selected from the group consisting of HC blue 2 and HC blue 12; (C1) at least one dye selected from the group consisting of basic red 76 and basic yellow 57; (C2) at least one dye selected from the group consisting of basic red 51, basic yellow 87, basic orange 31, and basic brown 17; and (D) a cationic surfactant, wherein the mass ratio (A / B) of the (A) to (B) is greater than 1.

Description

HAIR DYE COMPOSITION COMPRISING BLUE DYES, BASIC RED OR YELLOW DYES AND A CATIONIC SURFACTANT

[0001] The present invention relates to a hair dye composition.

[0002] Oxidative hair dyes, which dye hair through an oxidation reaction under the coexistence of an alkaline agent and an oxidizing agent, are widely used for dyeing hair. However, while these oxidative hair dyes have an excellent dyeing effect and can dye hair to a desired color, these hair dyes may cause damage to the hair and scalp.

[0003] In contrast, hair dyes using basic or HC dyes are known as treatment agents that cause less damage to the hair and scalp. Among hair dyes using such basic and HC dyes, color treatments are known as hair dyes that can dye hair while simultaneously performing treatment, have excellent convenience, and provide excellent uniformity of dyeing.

[0004] As an example of a color treatment, Patent Document 1 discloses a hair dye composition containing: component A: HC blue 16; component B: one or more dye selected from the group consisting of basic orange 31, basic red 51, basic red 76, basic yellow 87, and basic yellow 57; component C: HC blue 2; and component D: one or more dyes selected from the group consisting of HC yellow 4 and HC yellow 2.Prior art documents

[0005] Patent Documents Patent Document 1: WO 2018 / 180516 A1Summary of the invention

[0006] Problem to be solved by Invention

[0007] In the case of color treatment for dyeing gray hair, in addition to being able to experience the hair dyeing effect with one use, it is necessary to continue to obtain the gray hair hiding effect that makes gray hair less noticeable by continuing use approximately two or three times a week. Therefore, color treatments are required to be able to dye hair with the same color tone after continuous or consecutive use.

[0008] Therefore, an object of the present invention is to provide a hair dye composition that has a gray hair hiding effect and can suppress color tone changes due to continuous use.Means for solving the problem

[0009] The present inventor arrived at the present invention as a result of extensive studies to solve the problem above. In other words, the present invention provides the following preferred aspects.

[0010] 1. A hair dye composition, containing: (A) HC blue 16; (B) at least one dye selected from the group consisting of HC blue 2 and HC blue 12; (C1) at least one dye selected from the group consisting of basic red 76 and basic yellow 57; (C2) at least one dye selected from the group consisting of basic red 51, basic yellow 87, basic orange 31, and basic brown 17; and (D) a cationic surfactant, wherein the mass ratio (A / B) of the (A) to (B) is greater than 1, preferably greater than 1 and 20 or less, more preferably 1.2 to 20, even more preferably 1.5 to 10, yet even more preferably 1.8 to 5, and particularly preferably 2 to 3.

[0011] 2. The hair dye composition according to 1, wherein the amount of (A) is 0.1 to 1.0 mass%, preferably 0.15 to 0.8 mass%, more preferably 0.2 to 0.6 mass%, and even more preferably 0.25 to 0.5 mass%, the amount of (B) is 0.01 to 1.0 mass%, preferably 0.05 to 0.5 mass%, more preferably 0.08 to 0.3 mass%, and even more preferably 0.1 to 0.2 mass%, the total amount of (C1) and (C2) is 0.01 to 0.8 mass%, preferably 0.05 to 0.6 mass%, more preferably 0.1 to 0.5 mass%, and even more preferably 0.15 to 0.3 mass%, and the amount of (D) is 0.01 to 5.0 mass%, preferably 0.1 to 5.0 mass%, more preferably 0.5 to 4.0 mass%, and particularly preferably 1.0 to 3.0 mass%, based on the total amount of the hair dye composition.

[0012] 3. The hair dye composition according to 1 or 2, wherein the mass ratio (C1 / C2) of (C1) to (C2) is 1 to 20, preferably 1.2 to 15, more preferably 2 to 10, and even more preferably 3 to 6.

[0013] 4. The hair dye composition according to 1, wherein the total amount of component A and component B is 0.11 to 1.0 mass%, preferably 0.15 to 0.9 mass%, more preferably 0.15 to 0.8 mass%, even more preferably 0.2 mass% or more and less than 0.6 mass%, and particularly preferably 0.2 to 0.55 mass%, based on the total amount of the hair dye composition.

[0014] 5. The hair dye composition according to any one of 1 to 4, wherein the mass ratio [(A+B) / (C1+C2)] of the total amount of (A) and (B) to the total amount of (C1) and (C2) is 0.5 to 5, preferably 0.8 to 4, more preferably 1 to 3, and even more preferably 1.1 to 2.

[0015] 6. The hair dye composition according to any one of 1 to 5, wherein the mass ratio [A / (C1+C2)] of (A) to the total amount of (C1) and (C2) is 0.5 to 5, preferably 0.8 to 4, more preferably 1 to 3, and even more preferably 1.2 to 2.

[0016] 7. The hair dye composition according to any one of 1 to 6, wherein the mass ratio [B / (C1+C2)] of (B) to the total amount of (C1) and (C2) is 0.1 to 1, preferably 0.2 to 0.9, more preferably 0.3 to 0.8, and even more preferably 0.4 to 0.6.

[0017] 8. The hair dye composition according to 1 to 7, wherein the mass ratio (A / B) of (A) to (B) is 10 or less.

[0018] 9. The hair dye composition according to 1 to 8, further containing (E) urea.

[0019] 10. The hair dye composition according to 1 to 9, wherein the total amount of HC yellow 2, HC yellow 4, HC yellow 13, HC red 3, HC red 7, HC red 10, HC red 11, HC red 13, N,N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine, and hydroxyethyl-2-nitro-p-toluidine is 0.01 mass% or less, preferably 0 to 0.01 mass%, more preferably 0 to 0.005 mass%, and even more preferably 0 to 0.001 mass%, and particularly preferably, these dyes are not included.

[0020] 11. The hair dye composition according to any one of 1 to 10, which is a color treatment.Effects of Invention

[0021] The present invention can provide a hair dye composition that has a gray hair hiding effect and can suppress color tone changes due to continuous use.Embodiments of Invention

[0022] Embodiments of the present invention will be described below in detail. Note that the scope of the present invention is not limited to the embodiments described herein, and various modifications can be made within a scope that does not depart from the gist of the present invention.

[0023] <<Hair Dye Composition>> A hair dye composition of the present invention contains: HC blue 16 (component A); at least one dye selected from the group consisting of HC blue 2 and HC blue 12 (component B); at least one dye selected from the group consisting of basic red 76 and basic yellow 57 (component C1); at least one dye selected from the group consisting of basic red 51, basic yellow 87, basic orange 31, and basic brown 17 (component C2); and a cationic surfactant (component D).

[0024] <Component A> Component A is HC blue 16, which is a compound denoted by the INCI Name (International Cosmetic Ingredient Dictionary and Handbook, 15th Edition, Volume 1, 2014, p. 1449): HC BLUE NO. 16.

[0025] A commercial product can be used for component A. An example of a commercial product for component A includes the product name “HC Blue No. 16” manufactured by Artec Chemical.

[0026] In one embodiment of the present invention, the amount of component A is preferably 0.1 mass% or more, more preferably 0.15 mass% or more, even more preferably 0.2 mass% or more, and particularly preferably 0.25 mass% or more, based on the total amount of the hair dye composition. Furthermore, the amount of component A is preferably 1.0 mass% or less, more preferably 0.8 mass% or less, even more preferably 0.6 mass% or less, particularly preferably 0.5 mass% or less, and more particularly preferably 0.4 mass% or less, based on the total amount of the hair dye composition. When the amount of component A is more than or equal to the lower limit above, the dyeability of hair, particularly the gray hair dyeing effect and gray hair hiding effect, is easily improved and color tone change due to continuous use is easily suppressed. When the amount of component A is less than or equal to the upper limit above, the effect of suppressing skin staining is easily improved, and color transfer to a towel, clothing, and the like due to dye dissolved in water after rinsing is easily suppressed.

[0027] In one embodiment of the present invention, the amount of component A is preferably 0.1 to 1.0 mass%, more preferably 0.15 to 0.8 mass%, even more preferably 0.2 to 0.6 mass%, particularly preferably 0.25 to 0.5 mass%, and more particularly preferably 0.25 to 0.4 mass%, based on the total amount of the hair dye composition. When the amount of component A is within the range above, the gray hair hiding effect and effect of suppressing skin staining are easily improved, and color tone change due to continuous use and color transfer to a towel, clothing, and the like due to dye dissolved in water after rinsing are easily suppressed.

[0028] <Component B> Component B is at least one dye selected from the group consisting of HC blue 2 and HC blue 12. For component B, only one of HC Blue 2 and HC Blue 12 may be used, or both HC Blue 2 and HC Blue 12 may be used. HC Blue 2 is a compound denoted by the INCI Name: HC Blue No. 2, and HC Blue 12 is a compound denoted by the INCI Name: HC Blue No. 12. By including component B in addition to component A, the color saturation does not overly increase and the gray hair hiding effect is easily increased.

[0029] In the hair dye composition of the present invention, the mass ratio (A / B) of component A to component B is greater than 1. The present inventor discovered that when both component A and component B are included as blue dyes at a mass ratio (A / B) greater than 1, the dyeability of gray hair can be increased, the gray hair hiding effect can be improved, and changes in color tone due to continuous use can be suppressed. When the mass ratio (A / B) above is greater than 1, component A is a dye with higher color tone saturation and dyeability than component B. Therefore, a hair dye composition with higher dyeability and gray hair hiding effect can be obtained. Furthermore, although the reason is not clear for why the color tone change due to continuous use can be suppressed by making the mass ratio (A / B) above greater than 1, it is considered to be because the overall color balance is easy to maintain by keeping the amount of component B, which tends to lighten in dyeability over time, at or below a specific ratio to component A, which has a relatively small change in dyeability.

[0030] Furthermore, in general, HC dyes and basic dyes are prone to changes in chemical structure and dyeing results over time. When the hair dye composition is stored at a low temperature of approximately 5oC, little change in the dye occurs before and after storage, but when the hair dye composition is stored at a relatively high temperature (e.g., 30oC or higher, and particularly 40oC or higher), the HC dyes and basic dyes in the hair dye composition tend to change over time. Therefore, there may be a difference in dyeing results between using a hair dye composition before storage or a hair dye composition stored at a low temperature and using a hair dye composition stored at a relatively high temperature, and the desired dyeing results may not be achieved.

[0031] Surprisingly, however, the present inventor discovered that by making the aforementioned mass ratio (A / B) greater than 1, the difference in dyeing results can be reduced even when the hair dye composition is stored at a relatively high temperature. Therefore, the hair dye composition of the present invention can reduce the difference in dyeing results when stored at relatively high and low temperatures. In other words, the hair dye composition of the present invention has high dye stability even when stored at a relatively high temperature. Although the reason is not clear, it is considered to be because component A is a dye that does not easily change in chemical structure or dyeing results over time, even when stored at a relatively high temperature, as compared to component B. Hereinafter, in the present specification, a small difference in dyeing results between storage at relatively high and low temperatures may be described as "high dyeing stability at high temperature storage" or simply "high dyeing stability".

[0032] Note that in the present specification, dyeing results refer to the color and color tone of dyed hair. Therefore, a small difference in dyeing results indicates a small difference in color and color tone of dyed hair. Furthermore, in the present specification, suppressed color tone change due to continuous use means that the same dyeing results are easily achieved each time during continuous use.

[0033] On the other hand, if the mass ratio (A / B) of component A to component B is 1 or less, the dyeability, gray hair hiding effect, and dye stability during high temperature storage are likely to decrease, and color tone changes due to continuous use are likely to increase.

[0034] In one embodiment of the present invention, the aforementioned mass ratio (A / B) of component A to component B is preferably 1.2 or more, more preferably 1.5 or more, even more preferably 1.8 or more, and particularly preferably 2 or more, from the perspective of improving dyeability, gray hair hiding effect and dye stability, and suppressing color tone changes due to continuous use. The aforementioned mass ratio (A / B) of component A to component B is preferably 20 or less, more preferably 10 or less, even more preferably 5 or less, and particularly preferably 3 or less from the perspective of increasing the gray hair hiding effect. When the aforementioned mass ratio (A / B) is less than or equal to the upper limit above, overly high saturation can be suppressed, and thus the gray hair hiding effect is easy to increase.

[0035] In one embodiment of the present invention, the aforementioned mass ratio (A / B) of component A to component B is preferably greater than 1 and 20 or less, more preferably 1.2 to 20, even more preferably 1.5 to 10, yet even more preferably 1.8 to 5, and particularly preferably 2 to 3. When the aforementioned mass ratio (A / B) is within the range above, dyeability, gray hair hiding effect, and dye stability are easily improved, and color tone changes due to continuous use are easily suppressed.

[0036] In one embodiment of the present invention, the amount of component B is preferably 0.01 mass% or more, more preferably 0.05 mass% or more, even more preferably 0.08 mass% or more, and particularly preferably 0.1 mass% or more, based on the total amount of the hair dye composition. Furthermore, the amount of component B is preferably 1.0 mass% or less, more preferably 0.5 mass% or less, even more preferably 0.3 mass% or less, and particularly preferably 0.2 mass% or less, based on the total amount of the hair dye composition. When the amount of component B is more than or equal to the lower limit above, the dyeability and gray hair hiding effect on hair are easily improved. Furthermore, when the amount of component B is less than or equal to the upper limit above, the dye stability and pH stability are easily improved, and color transfer to a towel, clothing, and the like due to dye dissolved in water after rinsing is easily suppressed.

[0037] In one embodiment of the present invention, the amount of component B is preferably 0.01 to 1.0 mass%, more preferably 0.05 to 0.5 mass%, even more preferably 0.08 to 0.3 mass%, particularly preferably 0.1 to 0.2 mass%, and more particularly preferably 0.1 to 0.15 mass%. When the amount of component B is within the range above, the dyeability of hair, gray hair hiding effect, dye stability, and pH stability are easily improved, and color transfer to a towel, clothing, and the like due to dye dissolved in water after rinsing is easily suppressed.

[0038] In one embodiment of the present invention, the total amount of component A and component B may be, for example, 0.11 to 2.0 mass% based on the total amount of the hair dye composition, and from the perspective of efficiently achieving a gray hair dyeing effect, is preferably 1.0 mass% or less, more preferably 0.9 mass% or less, even more preferably 0.8 mass% or less, yet even more preferably less than 0.6 mass%, and particularly preferably 0.55 mass% or less. In one embodiment of the present invention, the total amount of component A and component B may preferably be 0.11 to 1.0 mass%, more preferably 0.15 to 0.9 mass%, even more preferably 0.15 to 0.8 mass%, yet even more preferably 0.2 mass% or more and less than 0.6 mass%, and particularly preferably 0.2 to 0.55 mass%, based on the total amount of the hair dye composition.

[0039] <Components C1 and C2> Component C1 is at least one dye selected from the group consisting of basic red 76 and basic yellow 57, and component C2 is at least one dye selected from the group consisting of basic red 51, basic yellow 87, basic orange 31 and basic brown 17. As a result of examining red dyes and yellow dyes to be combined with the blue dye of component A and component B, the present inventor discovered that combining component A and component B with component C1 and component C2 selected from a specific group improves dyeability, gray hair hiding effect, and dye stability during high temperature storage, and easily suppresses color tone changes due to continuous use. Therefore, by containing component C1 and component C2, the hair dye composition of the present invention has sufficient dyeing and gray hair hiding effects, as well as high dye stability even when stored at relatively high temperatures. Furthermore, the hair dye composition of the present invention contains both component C1 and component C2, and thus changes in color tone due to continuous use can be suppressed.

[0040] Basic red 76 is a compound denoted by the INCI Name: Basic Red 76. Basic yellow 57 is a compound denoted by Basic Yellow 57. Basic red 51 is a compound denoted by Basic Red 51. Basic yellow 87 is a compound denoted by Basic Yellow 87. Basic orange 31 is a compound denoted by Basic Orange 31. Basic brown 17 is a compound denoted by Basic Brown 17.

[0041] Component C1 is at least one dye selected from the group consisting of basic red 76 and basic yellow 57. In one embodiment of the present invention, component C1 preferably contains at least basic yellow 57 from the perspective of achieving a gray hair dyeing effect in combination with component A and component B. Furthermore, from the perspective of achieving a color tone that blends more easily with gray hair, component C1 preferably contain two dyes, i.e., both basic red 76 and basic yellow 57.

[0042] Component C2 is at least one dye selected from the group consisting of basic red 51, basic yellow 87, basic orange 31, and basic brown 17. In one embodiment of the present invention, component C2 preferably contains at least two or more dyes from the perspective of achieving a color tone that blends more easily with gray hair. Furthermore, in one embodiment of the present invention, component C2 is preferably at least one dye selected from the group consisting of basic red 51 and basic yellow 87 from the perspective of achieving a color tone that blends more easily with gray hair.

[0043] In one embodiment of the present invention, from the perspective of further increasing the gray hair hiding effect, at least one of component C1 and component C2 preferably contains at least two dyes, and both component C1 and component C2 more preferably contain at least two dyes.

[0044] In one embodiment of the present invention, the amount of component C1 is preferably 0.01 mass% or more, more preferably 0.05 mass% or more, and even more preferably 0.1 mass% or more, based on the total amount of the hair dye composition. Furthermore, the amount of component C1 is preferably 1.0 mass% or less, more preferably 0.8 mass% or less, and even more preferably 0.5 mass% or less, based on the total amount of the hair dye composition. When the amount of component C1 is more than or equal to the lower limit above, the gray hair hiding effect is easily increased. Furthermore, when the amount of component C1 is less than or equal to the upper limit above, black hair and dyed gray hair easily blend together.

[0045] In one embodiment of the present invention, the amount of component C1 is preferably 0.01 to 1.0 mass%, more preferably 0.05 to 0.8 mass%, and even more preferably 0.1 to 0.5 mass%, based on the total amount of the hair dye composition.

[0046] In one embodiment of the present invention, the amount of component C2 is preferably 0.005 mass% or more, more preferably 0.01 mass% or more, and even more preferably 0.02 mass% or more, based on the total amount of the hair dye composition. Furthermore, the amount of component C2 is preferably 0.3 mass% or less, more preferably 0.2 mass% or less, and even more preferably 0.15 mass% or less, based on the total amount of the hair dye composition. When the amount of component C2 is more than or equal to the lower limit above, the gray hair hiding effect is easily efficiently achieved. Furthermore, when the amount of component C2 is less than or equal to the upper limit above, black hair and dyed gray hair easily blend together.

[0047] In one embodiment of the present invention, the amount of component C2 is preferably 0.005 to 0.3 mass%, more preferably 0.01 to 0.2 mass%, and even more preferably 0.02 to 0.15 mass%, based on the total amount of the hair dye composition.

[0048] In one embodiment of the present invention, the total amount of component C1 and component C2 is preferably 0.01 mass% or more, more preferably 0.05 mass% or more, even more preferably 0.1 mass% or more, and particularly preferably 0.15 mass% or more, based on the total amount of the hair dye composition. Furthermore, the total amount of component C1 and component C2 is preferably 0.8 mass% or less, more preferably 0.6 mass% or less, even more preferably 0.5 mass% or less, and particularly preferably 0.3 mass% or less, based on the total amount of the hair dye composition. When the total amount of component C1 and component C2 is more than or equal to the lower limit above, color fading is less likely to occur (hereinafter also referred to as "color fastness is easily improved"). Furthermore, when the total amount of component C1 and component C2 is less than or equal to the upper limit above, skin staining is easily suppressed, color tone changes after storage are suppressed, and dyeing stability is easily increased.

[0049] In one embodiment of the present invention, the total amount of component C1 and component C2 is preferably 0.01 to 0.8 mass%, more preferably 0.05 to 0.6 mass%, even more preferably 0.1 to 0.5 mass%, and particularly preferably 0.15 to 0.3 mass%, based on the total amount of the hair dye composition. When the total amount of component C1 and component C2 is within the range above, color fastness is easily improved, skin staining is easily suppressed, color tone changes after storage are suppressed, and dyeing stability is easily increased.

[0050] In one embodiment of the present invention, the mass ratio (C1 / C2) of component C1 to component C2 is preferably 1 or more, more preferably 1.2 or more, even more preferably 2 or more, and particularly preferably 3 or more, from the perspective of suppressing overly high saturation and increasing the gray hair hiding effect. The aforementioned mass ratio (C1 / C2) of component C1 to component C2 is preferably 20 or less, more preferably 15 or less, even more preferably 10 or less, and particularly preferably 6 or less from the perspective of increasing the gray hair hiding effect.

[0051] In one embodiment of the present invention, the mass ratio (C1 / C2) of component C1 to component C2 is preferably 1 to 20, more preferably 1.2 to 15, even more preferably 2 to 10, and particularly preferably 3 to 6, from the perspective of increasing the gray hair hiding effect. In one embodiment of the present invention, the mass ratio [(A+B) / (C1+C2)] of the total amount of component A and component B to the total amount of component C1 and component C2 is preferably 0.5 or more, more preferably 0.8 or more, even more preferably 1 or more, and particularly preferably 1.1 or more from the perspective of achieving a color tone that blends more easily with gray hair. Furthermore, the aforementioned mass ratio [(A+B) / (C1+C2)] is preferably 5 or less, more preferably 4 or less, even more preferably 3 or less, and particularly preferably 2 or less from the perspective of increasing the gray hair hiding effect.

[0052] In one embodiment of the present invention, the mass ratio [(A+B) / (C1+C2)] of the total amount of component A and component B to the total amount of component C1 and component C2 is preferably 0.5 to 5, more preferably 0.8 to 4, even more preferably 1 to 3, and particularly preferably 1.1 to 2 from the perspective of increasing the gray hair hiding effect and the perspective of achieving a color tone that blends more easily with gray hair.

[0053] In one embodiment of the present invention, the mass ratio [A / (C1+C2)] of component A to the total amount of component C1 and component C2 is preferably 0.5 or more, more preferably 0.8 or more, even more preferably 1 or more, and particularly preferably 1.2 or more from the perspective of achieving a color tone that blends more easily with gray hair. Furthermore, the aforementioned mass ratio [A / (C1+C2)] is preferably 5 or less, more preferably 4 or less, even more preferably 3 or less, and particularly preferably 2 or less from the perspective of increasing the gray hair hiding effect.

[0054] In one embodiment of the present invention, the mass ratio [A / (C1+C2)] of component A to the total amount of component C1 and component C2 is preferably 0.5 to 5, more preferably 0.8 to 4, even more preferably 1 to 3, and particularly preferably 1.2 to 2.

[0055] In one embodiment of the present invention, the mass ratio [B / (C1+C2)] of component B to the total amount of component C1 and component C2 is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, and particularly preferably 0.4 or more from the perspective of achieving a color tone that blends more easily with gray hair. Furthermore, the aforementioned mass ratio [B / (C1+C2)] is preferably 1 or less, more preferably 0.9 or less, even more preferably 0.8 or less, and particularly preferably 0.6 or less from the perspective of increasing the gray hair hiding effect.

[0056] In one embodiment of the present invention, the mass ratio [B / (C1+C2)] of component B to the total amount of component C1 and component C2 is preferably 0.1 to 1, more preferably 0.2 to 0.9, even more preferably 0.3 to 0.8, and particularly preferably 0.4 to 0.6.

[0057] <Component D> Component D is a cationic surfactant. By including a cationic surfactant, the stability of the hair dye composition can be improved, the squeaky feel during rinsing due to the hair dye composition can be reduced, and finger combing can be increased.

[0058] The cationic surfactant is not particularly limited, and examples thereof include monoalkyl quaternary ammonium salt, dialkyl quaternary ammonium salt, trialkyl quaternary ammonium salt, monoalkyl ether type quaternary ammonium salt, alkylamines, fatty acid amidoamine, and the like. These cationic surfactants can be used alone or in combination of two or more. Of these cationic surfactants, monoalkyl quaternary ammonium salt, dialkyl quaternary ammonium salt, and fatty acid amidoamines are preferable from the perspective of treatment effect, and the monoalkyl quaternary ammonium salt and fatty acid amidoamine are more preferable.

[0059] Examples of monoalkyl quaternary ammonium salt include lauryl trimethylammonium chloride, myristyl trimethylammonium chloride, cetyl trimethylammonium chloride, stearyl trimethylammonium chloride, behenyl trimethylammonium chloride, alkyl (16,18) trimethylammonium chloride, alkyl (20-22) trimethylammonium chloride, stearyl dimethylbenzylammonium chloride, myristyl dimethylbenzylammonium chloride, tri(polyoxyethylene)stearylammonium chloride, di(polyoxyethylene)oleylmethylammonium chloride, and the like. Of these, stearyl trimethylammonium chloride, behenyl trimethylammonium chloride, alkyl (16,18) trimethylammonium chloride, and alkyl (20-22) trimethylammonium chloride are preferable, and behenyl trimethylammonium chloride is more preferable.

[0060] Examples of the fatty acid amidoamine include dimethylaminoethylamide myristate, dimethylaminopropylamide myristate, diethylaminoethylamide myristate, diethylaminopropylamide myristate, dimethylaminoethylamide palmitate, dimethylaminopropylamide palmitate, diethylaminoethylamide palmitate, diethylaminopropylamide palmitate, dimethylaminoethylamide stearate, dimethylaminopropylamide stearate, diethylaminoethylamide stearate, diethylaminopropylamide stearate, dipropylaminoethylamide stearate, dipropylaminopropylamide stearate, dimethylaminoethylamide behenate, dimethylaminopropylamide behenate, diethylaminoethylamide behenate, diethylaminopropylamide behenate, and the like. Of these, dimethylaminopropylamide stearate is preferable.

[0061] A fatty acid amidoamine is preferably used as a salt using an organic acid and / or inorganic acid. Examples of the organic acid include lactic acid, malic acid, citric acid, tartaric acid, acetic acid, and the like. Furthermore, examples of the inorganic acids include phosphoric acid, hydrochloric acid, sulfuric acid, and the like. Of these, lactic acid is preferable. The amount of the organic acid and inorganic acid is not particularly limited so long as the amount is sufficient to neutralize the fatty acid amidoamine to be added.

[0062] In one embodiment of the present invention, the amount of component D is preferably 0.01 mass% or more, more preferably 0.1 mass% or more, even more preferably 0.5 mass% or more, and particularly preferably 1.0 mass% or more, based on the total amount of the hair dye composition. Furthermore, the amount of component D is preferably 5.0 mass% or less, more preferably 4.0 mass% or less, and even more preferably 3.0 mass% or less, based on the total amount of the hair dye composition. When the amount of component D is more than or equal to the lower limit above, finger combing during rinsing is easily improved. Furthermore, when the amount of component D is less than or equal to the upper limit above, dyeing of the scalp is easily suppressed.

[0063] In one embodiment of the present invention, the amount of component D is preferably 0.01 to 5.0 mass%, more preferably 0.1 to 5.0 mass%, even more preferably 0.5 to 4.0 mass%, and particularly preferably 1.0 to 3.0 mass%, based on the total amount of the hair dye composition, from the perspective of easily improving finger combing during rinsing.

[0064] <Component E> In one embodiment of the present invention, the hair dye composition of the present invention preferably further contains urea as component E from the perspective of improving the pH stability of the hair dye composition and reducing the squeaky feel during rinsing to improve finger combing. According to the present inventor, when a hair dye composition containing component B (HC blue 2 and / or HC blue 12) is stored at a relatively high temperature (e.g., 30oC or higher, and particularly 40oC or higher), the pH of the hair dye composition may decrease. However, upon examination of the pH stability of the hair dye composition, the present inventor discovered that combining component B with urea improves the pH stability of the hair dye composition, and the pH of the hair dye composition does not easily decrease even when stored at relatively high temperatures, specifically 30oC or higher, and particularly 40oC or higher. It is not clear why the inclusion of component E could improve pH stability, but the following reasons are presumed. One possible reason for the decrease in the pH of the hair dye composition containing component B when stored at a relatively high temperature is that the chemical structure of the dye in component B changes over time and acts in the direction of reducing the pH of the hair dye composition. On the other hand, when the hair dye composition containing component E is stored at a relatively high temperature, component E can act in the direction of increasing the pH of the hair dye composition. Therefore, it is considered that by combining component B, which decreases the pH of the hair dye composition over time, with component E, which increases the pH of the hair dye composition over time, the pH of the hair dye composition is less likely to decrease even when stored at a relatively high temperature.

[0065] In one embodiment of the present invention, the amount of component E (urea) is preferably 0.01 mass% or more, more preferably 0.05 mass% or more, and even more preferably 0.1 mass% or more, based on the total amount of the hair dye composition. Furthermore, the amount of component E is preferably 10 mass% or less, more preferably 5 mass% or less, and even more preferably 2 mass% or less, based on the total amount of the hair dye composition. When the amount of component E is more than or equal to the lower limit above, the pH stability is easily improved. Furthermore, when the amount of component E is less than or equal to the upper limit above, the stability of the hair dye composition is easily improved.

[0066] In one embodiment of the present invention, the amount of component E (urea) is preferably 0.01 to 10 mass%, more preferably 0.05 to 5 mass%, and even more preferably 0.1 to 2 mass%, based on the total amount of the hair dye composition, from the perspective of increasing the pH stability.

[0067] In one embodiment of the present invention, the mass ratio (B / E) of component B to component E is preferably 2 or less or less than 2, more preferably 1.5 or less, even more preferably 1 or less, yet even more preferably 0.8 or less, and particularly preferably 0.6 or less, from the perspective of increasing the gray hair hiding effect and pH stability. Furthermore, the mass ratio (B / E) of component B to component E is preferably 0.1 or more, more preferably 0.15 or more, even more preferably 0.18 or more, and particularly preferably 0.2 or more, from the perspective of increasing pH stability.

[0068] In one embodiment of the present invention, the mass ratio (B / E) of component B to component E is preferably 0.1 to 2, more preferably 0.1 or more and less than 2, even more preferably 0.15 to 1.5, yet even more preferably 0.18 to 1, particularly preferably 0.18 to 0.8, and more particularly preferably 0.2 to 0.6, from the perspective of increasing the gray hair hiding effect and pH stability.

[0069] In one embodiment of the present invention, the mass ratio (E / [A+B+C1+C2]) of component E to the total amount of component A, component B, component C1, and component C2 is preferably 0.1 or more, more preferably 0.2 or more, and even more preferably 0.3 or more, from the perspective of increasing pH stability. Furthermore, the mass ratio (E / [A+B+C1+C2]) is preferably 2 or less, more preferably 1.5 or less, and even more preferably 1 or less, from the perspective of improving pH stability.

[0070] In one embodiment of the present invention, the mass ratio (E / [A+B+C1+C2]) of component E to the total amount of component A, component B, component C1, and component C2 is preferably 0.1 to 2, more preferably 0.2 to 1.5, and even more preferably 0.3 to 1, from the perspective of increasing pH stability.

[0071] <Other Dyes> In one embodiment of the present invention, the hair dye composition of the present invention may contain another dye other than the aforementioned component A, component B, component C1 and component C2, such as other HC dyes and basic dyes. Examples of other dyes include basic blue 124, basic blue 75, basic brown 16, and the like. The amount of the other dye can be selected, as appropriate, to the extent that it does not impair the effect of the present invention. When the other dye is included, the total amount is preferably 0.01 to 1 mass%, more preferably 0.01 to 0.8 mass%, and even more preferably 0.01 to 0.5 mass%, based on the total amount of the hair dye composition.

[0072] The present inventor discovered that if the hair dye composition contains, in addition to the aforementioned component A, component B, component C1 and component C2, a certain dye selected from HC yellow 2, HC yellow 4, HC yellow 13, HC red 3, HC red 7, HC red 10, HC red 11, HC red 13, N,N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine and hydroxyethyl-2-nitro-p-toluidine, color tone changes due to continuous use easily occur, and the stability of the hair dye composition, particularly dyeing stability, tends to decrease. Therefore, in one embodiment of the present invention, from the perspective of suppressing color tone changes due to continuous use and from the perspective of dye stability, the total amount of HC yellow 2, HC yellow 4, HC yellow 13, HC red 3, HC red 7, HC red 10, HC red 11, HC red 13, N,N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine, and hydroxyethyl-2-nitro-p-toluidine in the hair dye composition of the present invention is preferably 0.01 mass% or less, more preferably 0 to 0.01 mass%, even more preferably 0 to 0.005 mass%, yet even more preferably 0 to 0.001 mass%, and particularly preferably, these dyes are not included, based on the total amount of the hair dye composition.

[0073] The present inventor discovered that when the hair dye composition contains, in addition to the aforementioned component A, component B, component C1 and component C2, a certain dye selected from the group consisting of 4-hydroxypropylamino-3-nitrophenol, 4-amino-3-nitrophenol, and 2-amino-6-chloro-4-nitrophenol, a decrease in pH is more likely to occur. Therefore, in one embodiment of the present invention, from the perspective of improving pH stability, the total amount of 4-hydroxypropylamino-3-nitrophenol, 4-amino-3-nitrophenol, and 2-amino-6-chloro-4-nitrophenol in the hair dye composition of the present invention is preferably 0.01 mass% or less, more preferably 0 to 0.01 mass%, even more preferably 0 to 0.005 mass%, yet even more preferably 0 to 0.001 mass%, and particularly preferably, these dyes are not included, based on the total amount of the hair dye composition.

[0074] In one embodiment of the present invention, from the perspective of suppressing color tone changes due to continuous use and from the perspective of improving dye stability and pH stability, the total amount of HC yellow 2, HC yellow 4, HC yellow 13, HC red 3, HC red 7, HC red 10, HC red 11, HC red 13, N,N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine, hydroxyethyl-2-nitro-p-toluidine, 4-hydroxypropylamino-3-nitrophenol, 4-amino-3-nitrophenol, and 2-amino-6-chloro-4-nitrophenol in the hair dye composition of the present invention is preferably 0.01 mass% or less, more preferably 0 to 0.01 mass%, even more preferably 0 to 0.005 mass%, yet even more preferably 0 to 0.001 mass%, and particularly preferably, these dyes are not included, based on the total amount of the hair dye composition.

[0075] <Other Components> In addition to the aforementioned component A to component E and the other dye, the hair dye composition of the present invention may contain another component, if necessary. Examples of other components include: anionic surfactants; amphoteric surfactants; nonionic surfactants; polyhydric alcohols; higher alcohols; lower alcohols; fatty acid amides; hydrocarbon oils; ester oils; pH adjusters; algefacients such as l-menthol, 1,8 cineole, camphor, and the like; preservatives such as phenoxyethanol and the like; vegetable oils such as olive oil, macadamia nut oil, argan oil, and the like; silicones; moisture absorbents such as silica and the like; hyaluronic acid or derivatives thereof, collagen or derivatives thereof; amino acids or derivatives thereof; antioxidants; sequestering agents; vitamins; extracts from plants and animals; pearling agents; coloring agents; fragrances; and the like. These can be used alone or in combination of two or more. The total amount of the other component is not particularly limited so long as the effect of the present invention is not impaired, but may be, for example, 0.1 to 20 mass%, and preferably 1 to 15 mass%, based on the total amount of the hair dye composition.

[0076] In one embodiment of the present invention, the hair dye composition of the invention preferably contains a higher alcohol. Examples of higher alcohols include alcohols having 16 to 22 carbon atoms such as cetyl alcohol, stearyl alcohol, cetostearyl alcohol, isostearyl alcohol, 2-octyldodecanol, oleyl alcohol, behenyl alcohol. These higher alcohols can be used alone or in combination of two or more. The amount of the higher alcohol is not particularly limited, but from the perspective of stability over time, particularly dyeing stability and pH stability, the amount is preferably 1.0 to 10.0 mass%, and more preferably 3.0 to 8.0 mass%, based on the total amount of the hair dye composition.

[0077] In one embodiment of the present invention, the hair dye composition may contain a nonionic surfactant from the perspective of stability over time, particularly dye stability and pH stability. Examples of the nonionic surfactant include polyoxyethylene fatty acid, glycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, sucrose fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyglycerin alkyl ether, polyoxyethylene (hardened) castor oil, fatty acid alkylolamide, and the like. The amount of the nonionic surfactant is not particularly limited, but from the perspective of stability over time, particularly dyeing stability and pH stability, the amount is preferably 0.5 to 10.0 mass%, and more preferably 1.0 to 5.0 mass%, based on the total amount of the hair dye composition.

[0078] The hair dye composition of the present invention contains water. The water is not particularly limited but purified water is preferable. The amount of water can be adjusted according to the amount of components other than the water, and is preferably 50.0 to 90.0 mass%, and more preferably 60.0 to 80.0 mass%, based on the total amount of the hair dye composition.

[0079] <Hair Dye Composition> The hair dye composition of the present invention contains component A, component B, component C1, component C2, and component D, and the mass ratio (A / B) of component A to component B is greater than 1. Therefore, the composition has sufficient dyeability, gray hair hiding effect, and high dye stability, can suppress color tone changes due to continuous use, and also provides favorable finger combing when washed off.

[0080] Furthermore, the hair dye composition of the present invention, particularly in embodiments further containing component E, has high pH stability with suppressed pH reduction. High pH stability can suppress decomposition and transformation of dyes in the hair dye composition, thus improving the dye stability and the stability of the formulation system itself.

[0081] In one embodiment of the present invention, the pH of the hair dye composition is preferably 4.0 or more, more preferably 4.5 or more, and even more preferably 5.0 or more, from the perspective of dyeability. Furthermore, the pH of the hair dye composition is preferably 8.0 or less, and more preferably 7.5 or less, from the perspective of storage stability. The pH of the hair dye composition is preferably 4.0 to 8.0, more preferably 4.5 to 8.0, and even more preferably 5.0 to 7.5. The aforementioned pH of the hair dye composition is the pH at 25oC and can be measured with a pH meter.

[0082] The dosage form of the hair dye composition of the present invention is not particularly limited, and examples include liquid, viscous liquid, gel, emulsion, cream, and the like. Of these, a cream form is preferable from the perspective of dyeability and texture.

[0083] The hair dye composition of the present invention can dye hair ash, black, brown, green, blue-purple, or the like, and preferably ash, black, or brown. Therefore, the hair dye composition of the present invention can be used as a hair dye composition for gray hair dyeing, fashionable hair dyeing, or the like. In particular, the hair dye composition of the present invention can be used as a hair dye composition for gray hair dyeing from the perspective of color tone.

[0084] The hair dye composition of the present invention is preferably a color treatment. Color treatments are hair treatment agents that are generally used at the time of hair washing and applied to the hair after washing and then rinsed off. After washing hair with shampoo, the color treatment is used by a method in which the color treatment is applied to the hair, allowed to blend into the hair immediately after application or for approximately 3 to 10 minutes, and then rinsed off. Note that the color treatment may be used before washing hair. In such cases, the color treatment is used by a method in which the color treatment is applied to wet hair, and then allowed to blend into the hair immediately after application or for approximately 3 to 10 minutes before rinsing.

[0085] <<Method for Manufacturing Hair Dye Composition>> The method for manufacturing the hair dye composition of the present invention is not particularly limited and can be manufactured by a known method. The hair dye composition of the present invention may be manufactured, for example, by a method of stirring each component included in the hair dye composition using a paddle mixer or the like to homogeneity, or by a method of preparing an oil phase and an aqueous phase in advance and then adding the aqueous phase to the oil phase and emulsifying. In the method of adding the aqueous phase to the oil phase for emulsification, manufacture is specifically possible by the following method. For example, an aqueous phase heated to 70 to 90°C is gradually added to an oil phase that has been sufficiently dissolved by heating to 70 to 90°C, and then the mixture is thoroughly stirred for 5 minutes to perform emulsification. After emulsification, cooling to 20 to 40°C is performed, thorough and uniform stirring is performed, then additives such as urea previously dissolved in water, a pH adjuster, or the like are added, and then thorough and uniform stirring is performed to obtain a cream-like hair dye composition.Examples

[0086] The following examples further describe the present invention in detail, but the present invention is not limited by the examples.

[0087] <Example 1> A hair dye composition was prepared by blending each component in the proportions shown in Table 1. Specifically, an aqueous phase in which dyes and the like are heated to 80oC and dissolved is added to an oil phase in which an oil phase component is heated uniformly to 80oC, and the mixture is uniformly emulsified and cooled to 40oC. The additives were then added to obtain a cream-like hair dye composition. Sodium hydroxide was added in an amount such that the pH of the hair dye composition was 6.8 at 25oC.

[0088] <Examples 2 to 15 and Comparative Examples 1 to 9> Hair dye compositions were prepared in the same manner as in Example 1 in accordance with the compositions shown in Tables 1 and 2.

[0089] <Dyeability> Untreated white human hair bundles (10 cm long and 1 g in weight, manufactured by Beaulax Co., Ltd.) were used as test hair bundles.

[0090] The test hair bundles were washed with a commercial shampoo and then lightly drained. Thereafter, 5 g of each hair dye composition obtained in the examples and comparative examples was applied to the test hair bundle immediately after manufacture, and then blended into the entire hair bundle (hair) using a brush for one minute. Next, after leaving the hair bundles for five minutes, the hair dye composition was thoroughly rinsed from the hair bundle using lukewarm water at 40oC, towel-dried, and then dried thoroughly using a hair dryer to prepare evaluation hair bundles.

[0091] The resulting evaluation hair bundles were observed and the dyeability thereof was evaluated by seven expert evaluators using the following criteria. The average values of the results of the evaluation by the seven expert evaluators are shown in Tables 1 and 2. (Dyeability Evaluation Criteria) 5: Very darkly dyed. 4: Darkly dyed. 3: Dyed (standard) 2: Slightly dyed 1: No dyeing effect

[0092] <Effect of Suppressing Color Tone Change Due to Continuous Use> The hair dyeing treatment (from washing using shampoo to drying) described in <Dyeability> was performed, and two bundles of hair dyed with the hair dye compositions obtained in the examples and comparative examples were prepared in each case. The same hair dyeing treatment was then repeated four more times on one of the two dyed human hair bundles in each case, and continuous use of the hair dye on the human hair bundles was performed. Thereby, a hair bundle subjected to one hair dyeing treatment and a hair bundle subjected to five hair dyeing treatments were prepared for each example and each comparative example.

[0093] The obtained evaluation hair bundles subjected to one hair dyeing treatment and evaluation hair bundles subjected to five hair dyeing treatments were visually compared and observed, and the color change suppressing effect due to continuous use was evaluated by seven expert evaluators based on the following criteria. The average values of the results of the evaluation by the seven expert evaluators are shown in Tables 1 and 2. (Evaluation Criteria of Color Change Suppressing Effect Due to Continuous Use) 5: Very superior color change suppressing effect 4: Superior color change suppressing effect 3: Slightly inferior color change suppressing effect 2: Inferior color change suppressing effect 1: No color change suppressing effect

[0094] <Gray Hair Hiding Effect> A hair bundle of untreated 30% gray hair (10 cm in length and 1 g in weight, manufactured by Beaulax Co., Ltd.) was used as the test hair bundle to evaluate the gray hair hiding effect as follows.

[0095] 5 g of each hair dye composition obtained in the examples and comparative examples was applied to the test hair bundle immediately after manufacture, and then blended into the entire hair bundle (hair) using a brush for one minute. Next, after leaving the hair bundles for five minutes, the hair dye composition was thoroughly rinsed from the hair bundle using lukewarm water at 40oC, towel-dried, and then dried thoroughly using a hair dryer to prepare evaluation hair bundles.

[0096] The resulting evaluation hair bundles were observed and the gray hair hiding effect was visually evaluated by seven expert evaluators using the following criteria. The average values of the results of the evaluation by the seven expert evaluators are shown in Tables 1 and 2. (Evaluation Criteria of Gray Hair Hiding Effect) 5: Gray hair is not noticeable 4: Gray hair is slightly noticeable 3: Gray hair is noticeable 2: Gray hair is not dyed very well 1: Gray hair is not dyed

[0097] <Dye Stability> 30 g of each hair dye composition obtained in the Examples and Comparative Examples was placed in a 200 mL polyethylene bottle with a cap, and stored in a thermostatic bath at 50oC for four weeks to obtain hair dye compositions that have been stored at 50oC for four weeks. Similarly, hair dye compositions that have been stored at 5oC for four weeks were obtained.

[0098] In the hair dyeing treatment (from washing using shampoo to drying) described in <Dyeability>, evaluation hair bundles were prepared in the same manner as in the evaluation of dyeability except that the "hair dye compositions obtained in the examples and comparative examples immediately after manufacture" were changed to "hair dye compositions that have been stored at 50oC for four weeks" and "hair dye compositions that have been stored at 5oC for four weeks”.

[0099] In general, 5oC is a temperature at which dye decomposition and changes in dyeability to hair are unlikely to occur, while 50oC is a temperature at which dye decomposition and changes in dyeability to hair are likely to occur. Therefore, evaluation hair bundles dyed with the hair dye composition that have been stored at 50oC for four weeks and evaluation hair bundles dyed with the hair dye composition that have been stored at 5oC for four weeks were visually compared and observed, and the dye stability was evaluated by seven expert evaluators based on the following criteria. The average values of the results of the evaluation by the seven expert evaluators are shown in Tables 1 and 2. (Evaluation Criteria of Dye Stability) 5: No difference in dyeing results between 50oC and 5oC 4: Small difference in dyeing results between 50oC and 5oC 3: Large difference in dyeing results between 50oC and 5oC 2: Large difference in dyeing results between 50oC and 5oC, with different color tones 1: Sufficient dyeing results could not be obtained at 50oC

[0100] The numbers listed in each component column in the table indicate the amount of each component, and the units are in mass%.

[0101] As shown in Tables 1 and 2, the hair dye compositions in the examples had favorable dyeability and gray hair hiding effects, suppressed color change due to continuous use, and showed high dye stability during high temperature storage.

Claims

1. A hair dye composition, comprising: (A) HC blue 16; (B) at least one dye selected from the group consisting of HC blue 2 and HC blue 12; (C1) at least one dye selected from the group consisting of basic red 76 and basic yellow 57; (C2) at least one dye selected from the group consisting of basic red 51, basic yellow 87, basic orange 31, and basic brown 17; and (D) a cationic surfactant, wherein the mass ratio (A / B) of the (A) to (B) is greater than 1.

2. The hair dye composition according to claim 1, wherein the amount of (A) is 0.1 to 1.0 mass%, the amount of (B) is 0.01 to 1.0 mass%, the total amount of (C1) and (C2) is 0.01 to 0.8 mass%, and the amount of (D) is 0.01 to 5.0 mass%, based on the total amount of the hair dye composition.

3. The hair dye composition according to claim 1, wherein the mass ratio (C1 / C2) of the (C1) to (C2) is 1 to 20.

4. The hair dye composition according to claim 1, wherein the total amount of component A and component B is 0.11 to 1.0 mass% based on the total amount of the hair dye composition.

5. The hair dye composition according to claim 1, wherein the mass ratio [(A+B) / (C1+C2)] of the total amount of (A) and (B) to the total amount of (C1) and (C2) is 0.5 to 5.

6. The hair dye composition according to claim 1, wherein the mass ratio [A / (C1+C2)] of (A) to the total amount of (C1) and (C2) is 0.5 to 5.

7. The hair dye composition according to claim 1, wherein the mass ratio [B / (C1+C2)] of (B) to the total amount of (C1) and (C2) is 0.1 to 1.

8. The hair dye composition according to claim 1, wherein the mass ratio (A / B) of (A) to (B) is 10 or less.

9. The hair dye composition according to claim 1, further comprising (E) urea.

10. The hair dye composition according to claim 1, wherein the total amount of HC yellow 2, HC yellow 4, HC yellow 13, HC red 3, HC red 7, HC red 10, HC red 11, HC red 13, N,N'-bis(2-hydroxyethyl)-2-nitro-p-phenylenediamine, and hydroxyethyl-2-nitro-p-toluidine is 0.01 mass% or less.

11. The hair dye composition according to claim 1, which is a color treatment.

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