JP2018177754A - Two-pack type hair dye - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-pack type hair dye with high hair-dyeing properties.SOLUTION: A two-pack type hair dye contains (a) a first agent containing a material that reacts with iron to develop a color, and (b) a second agent containing iron salt, where the second agent contains an anion surfactant.SELECTED DRAWING: None

Description

  The present invention relates to a two-part hair dye.

  Hair dyes are roughly classified into temporary hair dyes, semi-permanent hair dyes, and permanent hair dyes, in terms of performance.

  Among these, permanent hair dyes are the most widely used because they are less discolored after dyeing. As a general permanent hair dye, an oxidation type hair dye which is used by mixing a first agent containing an oxidation dye and an alkali agent, and an oxidizing agent, mainly a second agent containing a hydrogen peroxide solution. Agents. However, such an oxidized type hair dye may damage the hair by the action of an alkaline agent and a hydrogen peroxide solution, and there is a concern about a strong allergic reaction due to some oxidation dyes.

On the other hand, non-oxidative type dyeing using the reaction between polyphenols such as tannic acid, gallic acid and hematein and metal salts as a highly safe hair dye with low damage to the hair and low allergic reaction Hair agents have been proposed (see Patent Documents 1 to 6).
Although iron salts are generally used as metal salts in the above non-oxidative hair dye, iron salts have low stability in aqueous solution, and stabilizers such as ascorbic acid and sodium acid sulfite are suitable. It is used. On the other hand, there has been a problem that ascorbic acid causes the preparation to discolor over time, and sodium acid sulfite has a strong specific odor.
In addition, it is necessary to cause polyphenols and an iron salt to react with each other to form a complex, but the complex tends to be formed under conditions of pH 5.0 or more. However, as described above, in order to maintain the stability of the iron salt, a stabilizer is essential, and particularly in the case of ascorbic acid, the pH is adjusted to the acidic side, generally 4. Since adjustment to 0 or less is desired, it is difficult to achieve the pH condition at the time of actual hair dyeing, and it is difficult to dye the hair favorably and it is difficult to improve the temporal stability. Met. On the other hand, sodium acid sulfite has a problem that it is not suitable for practical use because of its peculiar odor, and it was difficult to add.

JP 2005-029550 Patent document 1: JP-A-2004-353150 Japanese Patent Application Laid-Open No. 07-069850 Japanese Patent Application Publication No. 05-170629 JP, 2014-009160, A Japanese Patent Application Publication No. 2001-270812

As described above, the conventional non-oxidative hair dye is highly safe, but has problems with odor and stability over time, and the hair dye itself is not satisfactory.
An object of the present invention is to provide a non-oxidative two-component hair dye which has high temporal stability and high dyeability.

  The two-component hair dye of the present invention comprises a first agent containing (a) a substance that reacts with iron to form a color, and (b) a second agent containing an iron salt. And the second agent contains an anionic surfactant.

  According to the present invention, it is possible to provide a non-oxidative two-component hair dye which has high temporal stability and good dyeability.

  Hereinafter, embodiments of the present invention will be described.

Hair dye
The two-part hair dye of the present invention comprises (a) a first agent containing a substance that reacts with iron to form a color, and (b) a second agent containing an iron salt.

(A) First Agent The first agent contains a substance that reacts with iron to develop a color.
Examples of the substance that develops color by reacting with iron include organic compounds and plant extracts. Examples of such organic compounds include tannic acid, gallic acid, octyl gallate, propyl gallate, laccaic acid, alizarin, isoquercetin, zeta tannin, catechol, gallotannin, quercetin, curcumin, getidine, tetrahydropalmatine, naphthoquinone, palmatin And 2-hydroxy-1,4 naphthoquinone, 5-hydroxy-1,4 naphthoquinone, pyrocalol, phenanthraquinone, brazilin, phloroglucin, hematein, verin, berberine, rutin and the like.
In addition, plant extracts are red grapes, red locust, red locust, oolong tea, turmeric, prunus vulgaris, vulgaris, vulgaris, vulgaris, vulgaris, vulgaris, vulgaris, vulgaris, vulgaris, walnuts, wisteria, gentian, vulgaris, black tea, vulgaris, vulgaris, vignata , Fivefold child, pomegranate, hawthorn, zion, peony, honeysuckle, suowu, sicilian gourd, senna, clove, dokdami, elderberry, elderfish, vitiligo, alderfish, betelfish, brazilwood, henna, button, magwa, minobaraninoki, mehajiki merissa , Yamamotomo, Yukinoshita, green tea, Japanese apricot, rosemary, log wood and the like.
It is preferable to use gallic acid and / or tannic acid from the viewpoint of dyeability, availability, and safety as the substance that reacts with the above-mentioned iron to develop color.

  The substance that reacts with iron to form a color can be used singly or in any combination, and in the first agent, 0.01 to 20% by weight is preferable, and 0.5 to 10% by weight is more preferable. If the amount of the substance that reacts with iron to develop color is too low, the dyeability may be poor. If the amount is too large, no further improvement in the dyeing effect can be expected.

  Further, it is preferable to add ascorbic acid and a salt thereof, cysteine and a salt thereof to the first agent as a stabilizer. It is preferable to adjust pH of a 1st agent to 2.0-11.0, and it is more preferable to adjust to 2.0-8.0. The pH may be adjusted with a commonly used acid or base, such as lactic acid, citric acid, arginine or sodium hydroxide.

  As the solvent, purified water (water), ethanol, isopropyl alcohol, 1,3 butylene glycol, glycerin, dipropylene glycol and the like can be used as long as they are usually used. Diol, 2-methyl-2,4-pentadiol, benzyl alcohol, carbitol, benzyloxyethanol and the like may also be used as the solvent.

(B) Second Agent The second agent contains an iron salt and an anionic surfactant. The combination of the iron salt and the anionic surfactant can improve the stability of the second agent.
Examples of the iron salt include ferrous sulfate, ferric sulfate, ferrous hydrochloride, ferric hydrochloride, ferrous acetate, ferric acetate, ferrous gluconate, ferrous nitrate, and ferric lactate. Mono-iron etc. are mentioned. The iron salts may be used alone or in any combination. Of these iron salts, ferrous sulfate is particularly preferred.
These iron salts are preferably added in an amount of 0.1 to 20.0% by weight, more preferably 0.4 to 10.0% by weight, in the second agent. If the concentration of the iron salt is lower than 0.1% by weight, the mordant property (dyeability) may decrease, while if the concentration of the iron salt exceeds 20% by weight, the mordanting property (more Stainability is difficult to improve.

Also, as the above-mentioned anionic surfactant, fatty acid salt, alkyl ether carboxylate, acyl lactate, N-acyl amino acid salt, N-acyl methyl taurine salt, alkane sulfonate, α-olefin sulfonate, α- At least one selected from sulfo fatty acid methyl ester salts, alkyl sulfosuccinates, acyl isethionates, alkyl sulfates, alkyl ether sulfates, higher fatty acid alkanolamide sulfates and the like. These anionic surfactants may be used alone or in combination of two or more. Examples of the salt include salts of alkali metals such as Na and K, amines such as triethanolamine and monoethanolamine, and amino acids such as arginine.
In the second agent, the weight ratio of the anionic surfactant to the iron salt is preferably in the range of 1: 0.3 to 1:10, and the range of 1: 0.4 to 1: 2 is More preferable. When the amount of the anionic surfactant is less than the weight of the iron salt, the mordant property (staining property) may be lowered and the temporal stability of the second agent may be lowered.
Moreover, it is preferable to adjust pH of a 2nd agent to 5.0-11.0, and it is more preferable to adjust to 5.5-10.0. When the pH of the second agent is lower than 5.0, the mordant property (stainability) may be lowered, and the temporal stability of the second agent may be lowered. On the other hand, when the pH exceeds 11.0, there is a concern in safety such as skin irritation.

The two-component hair dye of the present invention is used by combining the first and second agents of the present invention.
The dosage form of the first and second agents is not particularly limited. For example, it can be a cream, a liquid, a gel, an emulsion, a spray, an aerosol and the like. Among them, aerosol is preferred. The form of the first agent and the form of the second agent may be the same or different.
The first and second agents may further contain known components necessary for formulation which can be selected according to the type of each preparation.
The known components necessary for formulation may be appropriately set for each type of dosage form. In the case of the aerosol type, for example, the first agent or the second agent, and the compressed gas, the surfactant, the thickener, and / or the liquefied gas, etc. may be produced by filling the pressure container with an anaerobic atmosphere. Just do it. In addition, as compressed gas used here, nitrogen, carbonic acid, argon etc. are preferable. The other dosage forms may be prepared according to known methods.

[Method of dyeing hair]
The hair dyeing method of the present invention is a method in which the first agent is applied to the hair and left for a predetermined time, then the second agent is applied to the hair, and then left for a predetermined time and then washed away.

The application to hair can be carried out according to a known method, and specific examples include a method of direct application to hair, a method of application to hair using a tool such as a hand or a brush, and the like.
The time for leaving the first agent and the second agent can be set appropriately. Further, as a method of washing out the first agent and the second agent, a known method may be used.

  The amount of hair dye applied to the hair can be appropriately set according to the length and the like.

Next, Examples of the present invention will be described together with Comparative Examples, but the present invention is not limited to the following Examples.
The first agent in the two-component hair dye of the example of the present invention and the comparative example was prepared with the composition shown in Table 1. The pH of the prepared first agent is also described in Table 1.

Furthermore, the 2nd agent in the two-component hair dye of this invention and a comparative example was prepared by the composition shown to Table 2, 3, 4, 5.

Evaluation was performed as follows using the two-component hair dye of these Examples and Comparative Examples.
<Evaluation method 1: Mordant property (staining property)>
After applying 1.5 g of the first agent prepared on the attached white cloth (3 cm × 3 cm) for color fastness test in accordance with JIS L 0803 and leaving it to stand at room temperature for 30 minutes, the second agent of Example or Comparative Example 1 The solution was coated with .5g and allowed to stand at room temperature for 10 minutes, washed with lukewarm water and air dried.
First, the dyed white cloth was visually confirmed to confirm the mordant property (staining property). The evaluation was made as dark black: good, black: somewhat good, light black to brown, etc .: poor. Subsequently, Lab of the dyed white cloth was measured using color reader CR-13 type (made by Konica Minolta). The evaluation and measurement results are shown in Tables 2, 3, 4 and 5. Here, those having an L value of 40.0 or less were judged to be good in stainability. The ΔE value indicates the color difference between the color tone of the dyed fabric dyed with the hair dye immediately after preparation and the color tone of the dyed fabric dyed with the hair dye 40 ° C. × 6 months after preparation. In Evaluation Method 1, the second agent of Example and Comparative Example was used immediately after preparation.

<Evaluation method 2: Mordant property (staining property)>
After applying 2.0 g of the first preparation prepared on 10 cm (0.4 g) of human hair white hair BM-W-A (manufactured by Beaulux Co., Ltd.) and leaving it to stand at room temperature for 30 minutes, After 2.0 g of the second agent was applied and allowed to stand at room temperature for 10 minutes, it was washed with warm water and air dried. The mordant property (staining property) of the human hair after dyeing was visually confirmed. The evaluation and measurement results are shown in Tables 2, 3, 4 and 5.

<Evaluation method 3: stability over time>
The second agent prepared in Examples and Comparative Examples was filled in a mayonnaise bottle and stored in a thermostat at 40 ° C. for 6 months, after which the properties of the second agent were confirmed. The evaluation and measurement results are shown in Tables 2, 3, 4 and 5.

<Evaluation method 4: Mordant (dyeability), stability over time>
The second agent prepared in Examples and Comparative Examples is filled in an aluminum tube and stored for 6 months in a constant temperature bath at 40 ° C., after which the properties of the second agent and the mordant properties (dyeability using the second agent) )It was confirmed. The mordant properties were evaluated in the same manner as in the evaluation method 1. The evaluation and measurement results are shown in Tables 2, 3, 4 and 5.

  As shown in Tables 1 to 5, it can be seen that, in the case of adding an anionic surfactant to the second agent, the dyeing effect is high and the temporal stability is excellent. On the other hand, those which did not use a stabilizer for the second agent and those which used a stabilizer other than an anionic surfactant (glucose, Na sulfite, ethodronic acid 4Na) were able to achieve both dyeability and stability over time. It was not.

Furthermore, the 1st agent and the 2nd agent were prepared with the composition shown in Table 6. The hair dye was evaluated in the same manner as described above using these first and second agents. The results are also shown in Table 6.

  As shown in Table 6, even if the first agent is changed, it can be seen that the second agent added with an anionic surfactant has a high dyeing effect as in the case of using the first agent described above. In addition, it is understood that the second agent contains an anionic surfactant and is excellent in the temporal stability.

Claims (5)

A two-component hair dye comprising: (a) a first agent containing a substance that reacts with iron to develop color; and (b) a second agent containing an iron salt,
The second agent comprises an anionic surfactant.   The two-component hair dye according to claim 1, wherein the weight ratio of the anionic surfactant to the iron salt in the second agent is 1: 0.3 to 1:10.   The two-component hair dye according to claim 1 or 2, wherein the second agent has a pH of 5.0 to 10.0.   The two-component hair dye according to any one of claims 1 to 3, wherein the concentration of the iron salt in the second agent is 0.1 to 20% by weight.   The anionic surfactant includes fatty acid salt, alkyl ether carboxylate, acyl lactate, N-acyl amino acid salt, N-acyl methyl taurine salt, alkane sulfonate, α-olefin sulfonate, α-sulfo fatty acid methyl The ester salt, alkyl sulfosuccinate salt, acyl isethionate salt, alkyl sulfate ester salt, alkyl ether sulfate ester salt, and higher fatty acid alkanolamide sulfate ester salt according to any one of claims 1 to 4. Two-part hair dye as described in.