JPH08765B2 - Sustainable hair dye composition - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slow-dyeing hair dye composition, and more specifically, by repeatedly using it several times to make gray hair less noticeable or to color black hair, A slow-dyeing hair dye composition that is excellent in dyeing power and is used for applications such as giving light and darkness and enjoying subtle color changes, with little discoloration, and less dyeing on the scalp and fingers. It is about.

[0002]

2. Description of the Related Art Conventionally, although an acidic hair dye using a tar-based acidic dye has a large amount of dye and a high hair dyeing power, it is very difficult to remove the dye dyed on the scalp and skin. Therefore, it is necessary for a skilled beautician to perform the treatment, which is not suitable as a general household hair dye used by amateurs. Also, there are many discolorations after hair dyeing, which may contaminate pillowcases and clothes.

[0003] On the other hand, recently, as a consumer's intention, gray hair is anxious, but it is desired that the gray hair be naturally inconspicuous, and the black hair should be a little brighter, without a sudden change that suddenly changes to black hair one day. There is a growing demand for people to want to show them and to enjoy the changes by coloring them. There is a demand for a so-called slow-dyeing hair dye, which can be easily treated at home and can be gradually dyed by repeating the treatment several times.

In order to meet this demand, a hair dye containing a small amount of tar-based acidic dye has been proposed, but it is difficult to balance the dyeing power for hair with the stain on the scalp and skin, and it is necessary to satisfy both requirements. No dyeing hair dye was found.

[0005]

In view of the above situation, the present invention is a general household hair dye containing a tar-based acidic dye, which has good dyeability to hair and less color loss.
Moreover, it is an object of the present invention to provide a slow-dyeing hair dye with less contamination of the scalp and skin.

[0006]

Means for Solving the Problems As a result of various studies to achieve the above object, the present inventor has found that in a slow dyeing hair dye containing a tar-based acidic dye as a coloring component, a specific component is selectively A limited amount, combined and formulated, and the pH of the mixture
It has been found that the object of the present invention can be achieved by adjusting the viscosity and the viscosity within a predetermined range.

In summary, in the case of the present invention, a higher alcohol and a cream base mainly composed of a higher fatty acid have a high effect of adhering the dye to the hair as a solvent, but the benzyl alcohol impairs the emulsion stability of the cream base. It has been found that it is possible to mix an effective amount of, and a small amount of tar-based acidic dye is added, which has excellent dyeing power, less discoloration, and less dyeing on the scalp and fingers during treatment. .

That is, the gist of the present invention is 0.001 to 0.5% by weight of a tar-based acidic dye and 3 higher alcohols.
-10 to 10% by weight, higher fatty acid 0.5 to 5% by weight and benzyl alcohol 1 to 6% by weight, the pH of the mixture is 2 to 5, and the viscosity is 5,000 to 20,000c.
A slow-dyeing hair dye composition characterized by being ps creamy.

The structure of the present invention will be described in detail below. In the slow-dyeing hair dye of the present invention, it is essential to use each of the above-mentioned components in combination, and the use amount thereof will be clear from Examples and Comparative Examples described later. , It is important to adjust to a specific range.

The tar-based acidic dye to be used in the present invention may be a conventionally known one, which can be appropriately selected according to the desired dyeing and coloring, and if necessary, two or more dyes may be used in combination. May be. Specific examples of these tar-based acidic dyes include, for example, Red No. 102 (1- (4-sulfo-1-naphthylazo) -2-naphthol-6,8-disulfonic acid trisodium salt), Red No. 106 (9 − (4 '
-Sulfo-2'-sulfoniumphenyl) -6-diethylamino-3- (N, N-diethylimino) -3-isoxanthene monosodium salt), Red No. 201 (4-
(Orthosulfoparatarylazo) -3-hydroxy-2-naphthoic acid monosodium salt), orange 205
No. (1-para-sulfophenylazo-2-naphthol monosodium salt), Orange No. 402 (4-para-sulfophenylazo-1-naphthol monosodium salt),
Yellow No. 4 (3-carboxy-5-hydroxy-1-para-sulfophenyl-4-para-sulfophenylazopyrazole trisodium salt), Yellow No. 403 (1)
(2,4-dinitro-1-naphthol-7-sulfonic acid disodium salt), Green No. 204 (1-hydroxy-3,
6,8-Pyrenetrisulfonic acid trisodium salt), Blue No. 1 (4-{[4- (N-ethyl-meta-sulfobenzylamino) -phenyl]-(2-sulfoniumphenyl) -methylene}-[1 -(N-ethyl-N-meta-sulfobenzyl)-[Delta] ^2.5 -cyclohexadieneimine]
Disodium salt), Blue No. 203 (4-{[4- (N
- Ethyl over benzylamino) - phenyl] - (5 - hydroxy - 4 - sulfo - 2 - sulfonium phenyl) - methylene} - (N-ethyl -N- benzyl - △ ^2.5 - cyclohexanol calcium salt of diene imine)), Purple 401
No. (1-hydroxy-4- (orthosulfoparatoluino) -anthraquinone monosodium salt), Black No. 401 (8-amino-7-para-nitrophenylazo-2-phenylazo-1-naphthol-3, 6-disulfonic acid disodium salt) and the like.

The content of the tar-based acidic dye is 0.01
Is 0.5 to 0.5% by weight, preferably 0.05 to 0.3% by weight. When the amount of the tar-based acidic dye is less than the above range, the hair dyeing effect becomes insufficient. On the contrary, when the amount is more than the above range, not only the dyeing on the scalp and fingers is remarkable but also the discoloration is large, which is desirable. Absent.

Next, as the higher alcohol, for example,
Lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, etc., usually having 10 to 23 carbon atoms, preferably 12 to 1 carbon atoms.
8 fatty acid higher alcohols. You may use these higher alcohols in combination of 2 or more types. The content of higher alcohol is 3 to 10% by weight, preferably 4 to 8% by weight. If this content is less than the above range, benzyl alcohol, which is one of the essential components of the present invention, cannot be satisfactorily blended in the required amount, and the viscosity of the composition as a whole becomes low, causing the risk of separating the cream base. There is a nature. On the other hand, when the amount is more than the above range, the viscosity of the entire composition becomes too high, and it is difficult to apply to the hair, and uniform hair dyeing treatment cannot be performed, which is not preferable.

The higher fatty acids include, for example, saturated or unsaturated higher fatty acids usually having 10 to 20 carbon atoms such as lauric acid, myristic acid, palmitic acid and stearic acid. These higher fatty acids may be used in combination of two or more. Higher fatty acid content is 0.5
-5% by weight, preferably 1-3% by weight. If this content is less than the above range, the stability of the cream base will be poor, and if it is too large, the viscosity will be too high and the coatability as a hair dye will be poor, such being undesirable.

In the present invention, benzyl alcohol is contained in addition to the above-mentioned tar-based acidic dye, higher alcohol and higher fatty acid, and the content of benzyl alcohol is 1 to 6% by weight, preferably 2 to 5% by weight. When the content of benzyl alcohol is less than the above range, the dyeing of the tar-based acidic dye on the hair becomes poor, and when it exceeds the above range, the stability of the cream base is impaired, which is not preferable.
In the present invention, it is possible to maintain a stable cream base and prepare a hair dye composition excellent in coating properties and hair dyeing properties by the interaction of a predetermined amount of higher alcohol, higher fatty acid and benzyl alcohol. You can do it.

In the hair dye composition of the present invention, the pH of the mixture is adjusted to 2 to 5 and the viscosity is 5,000 to 20,000.
It is important that the cream is adjusted to 0 cps (centipoise). As the pH adjuster, an organic acid such as citric acid or lactic acid or an inorganic acid such as hydrochloric acid is usually used. If the pH is less than 2, dyeing on the scalp and fingers becomes remarkable, while if it exceeds 5, the dyeing power becomes weak, which is not preferable. Regarding the viscosity, if it is less than 5,000 cps, the dripping of the dyeing solution when applied to the hair is large and the applicability becomes poor. Conversely, if it exceeds 20,000 cps, the hair dye is This is not preferable because the fluidity of the liquid is deteriorated and uniform coating cannot be performed, resulting in uneven dyeing.

Further, in the present invention, it is more preferable to add a water-soluble alcohol and / or an anionic surfactant in addition to the above components. In short, the incorporation of water-soluble alcohols has the effects of facilitating the dissolution of benzyl alcohol in the cream base and enhancing the dyeing power of the tar-based acidic dye on the hair. Further, the addition of an anionic surfactant not only improves the emulsion stability of the cream base, but also suppresses the dyeing of the tar-based acidic dyes on the scalp and fingers, and also makes it easier to remove the dyes that have adhered. There is. In addition, in the present invention, when a cationic surfactant is blended, it causes an ionic bond with the tar-based acidic dye to reduce the dyeing power to the hair, so it is desirable to avoid blending the cationic surfactant.

Specific examples of the water-soluble alcohols include monohydric fatty acid lower alcohols such as ethanol and isopropanol, and fatty acid polyhydric alcohols such as propylene glycol, 1,3-butylene glycol and glycerin. Polyhydric alcohols are particularly preferable. The amount of the water-soluble alcohol compounded is usually 1 to 5% by weight. Further, specific examples of the anionic surfactant include, for example, alkyl sulfate type, alkyl ether sulfate type, and sulfosuccinate type surfactants, and alkyl sulfate or alkyl ether sulfate is particularly preferable. . The amount of the anionic surfactant is usually 0.2 to 2% by weight.
Is. Two or more kinds of each of these water-soluble alcohols and anionic surfactants can be used.

The slow-dyeing hair dye composition of the present invention contains
If necessary, paraffins, lanolin derivatives, esters, oils and fats such as silicone oils and animal and vegetable oils, nonionic surfactants, amphoteric surfactants, anti-dandruff agents, hair-growth-restorants, preservatives such as parabens, Various protein hydrolysates, water-soluble polymers such as xanthan gum, pearlizing agents such as glycol esters, and known compounding agents such as fragrances may be appropriately added.

[0019]

EXAMPLES Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the description of the following examples as long as the gist thereof is not exceeded. Example 1 and Comparative Examples 1 to 6 Prepared by mixing the tar-based acidic dyes shown in Table 1 and various blending components at a predetermined ratio (balanced with purified water), and adjusting to a predetermined pH and viscosity. Table 1 shows the results of the dyeing strength test, the fading test and the background stain removal test of the creamy slow-dyeing hair dye composition according to the following measuring methods.

[0020]

[Table 1]

(1) Dyeing power test Five hair bundles (white hair-blended human hair and goat hair: weight about 2 g) were used.
% Sodium lauryl sulphate, wash thoroughly with warm water, wipe off excess water, apply 2 g of the slow-dissolving hair dye composition, and spread evenly with a comb. 5
After leaving at room temperature for a minute, thoroughly wash with warm water. This operation is repeated 5 times at an interval of once a day, and the dyeing power in the dry state is evaluated according to the following criteria.

<Judgment> A: Goat hair and gray hair are colored dark brown, and gray hair is not noticeable. ○: Goat hair and gray hair are colored brown, and the gray hair is slightly inconspicuous. Δ: Goat hair and gray hair are colored slightly brown, but the gray hair is clearly noticeable.

X: The goat's hair is slightly colored, but the white hair is not colored. (2) Discoloration test One day after the test, the hair bundles dyed in the hair dyeing test are immersed in a 1% sodium lauryl sulfate aqueous solution at 50 ° C for 20 minutes, and then thoroughly washed with warm water. The degree of fading at this time is evaluated according to the criteria of the hair dye test.

(3) Background stain removal test 0.2 g of the slow-dyeing hair dye composition was applied to the inside of the arm in a circular area with a diameter of 1 cm, left for 10 minutes, and then rinsed with warm water. Further, using soap, lightly rub with fingers for 10 minutes and rinse with warm water. After washing with water, the degree of dyeing on the skin after using soap is evaluated according to the following criteria.

<Judgment> A: No trace is left. ○: A slight brown mark remains. Δ: A brown mark remains.

X: A dark brown mark remains.

[0027]

EFFECTS OF THE INVENTION According to the slow dyeing hair dye composition of the present invention,
By repeatedly using at home after shampooing, etc.,
In applications such as making white hair inconspicuous, darkening and darkening black hair, and coloring it to enjoy subtle changes, it has excellent dyeing power and little discoloration, so it does not stain the pillow cover or clothes, and further It is extremely desirable for practical use because it does not require any special equipment or technique, and even if it is applied to the hair of bare hands, it does not stain the scalp or fingers and the adhered color can be easily removed.

Claims (2)

[Claims] 1. Tar-based acidic dye 0.01 to
0.5% by weight, higher alcohol 3-10% by weight, higher fatty acid 0.5-5% by weight and benzyl alcohol 1-6% by weight, and the mixture has a pH of 2-5 and a viscosity Is 5,000
A slow-dyeing hair dye composition, which is in the form of a cream of 20,000 cps. 2. The slow-dyeing hair dye composition according to claim 1, further comprising 1 to 5% by weight of a water-soluble alcohol.