JP2016079166A - Two-pack type hair dye - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-component hair dye having a high hair dyeing property. The two-component hair dye of the present invention comprises (a) a first agent containing a substance that develops color by reacting with iron, and (b) a second agent containing an iron salt. An expression hair dye, wherein the first agent contains an alkali metal salt. [Selection figure] None

Description

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

  Hair dyes are roughly classified into temporary hair dyes, semi-permanent hair dyes, and permanent hair dyes from the viewpoint of performance.

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

  On the other hand, non-oxidative hair dyes that use the reaction of polyhydric phenols and metal salts have been proposed as highly safe hair dyes with low damage to hair and allergic reactions. (See Patent Documents 1 to 3).

JP 2008-273969 A JP 2014-009160 A JP 2001-270812 A

However, the conventional non-oxidative hair dyes have high safety, but have low hair dyeing effects and are not satisfactory.
An object of the present invention is to provide a non-oxidizing two-component hair dye having a high hair dyeing property.

  The two-component hair dye of the present invention comprises (a) a first agent containing a substance that develops color by reacting with iron, and (b) a second agent containing an iron salt. And the 1st agent contains an alkali metal salt, It is characterized by the above-mentioned.

  According to the present invention, it is possible to provide a non-oxidizing two-component hair dye having high hair dyeing properties and a hair dyeing method using the hair dye.

  Hereinafter, embodiments of the present invention will be described.

[Hair dye]
The two-component hair dye of the present invention comprises (a) a first agent containing a substance that develops color by reacting with iron, and (b) a second agent containing an iron salt.

(A) First Agent The first agent contains a substance that develops color by reacting with iron, and contains an alkali metal salt.
Examples of the substance that develops color by reacting with iron include organic compounds and plant extracts. Such organic compounds include tannic acid, gallic acid, octyl gallate, propyl gallate, alizarin, isoquercetin, tannin, catechol, gallotannin, quercetin, curcumin, gethidine, tetrahydropalmatine, naphthoquinone, palmatin, 2- Examples include hydroxy-1,4 naphthoquinone, 5-hydroxy-1,4 naphthoquinone, pyrocarol, phenanthraquinone, bradylin, phloroglucin, hematein, verine, berberine, and rutin.
In addition, plant extracts are red grape, red-breasted, red-breasted, red-flowered tea, oolong tea, turmeric, eel-bush, red-tailed eel, green grass, green grass, yellow-bellied, giant petrel, hypericum, yellowfin, walnuts, keihi, gentiana, gennosho-ko, black-bellied, black-white , Pentaploid, pomegranate, hawthorn, zion, peonies, jujube, honeysuckle, suou, achillea millefolium, senna, clove, dokudami, elderberry, elephant, snapper, betel row, dandelion, brazilwood, henna, button, mugwa, minobaranoki, mehajiki , Yam, saxifrage, green tea, forsythia, rosemary, and logwood.
The substance that develops color by reacting with iron preferably uses at least one selected from gallic acid, tannic acid, and hematein from the viewpoints of dyeability, availability, and safety.

  One or more kinds of substances that develop color by reacting with iron can be used in any combination. 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 and develops color is too small, the dyeability may be inferior. If it is too much, the dyeing effect cannot be further improved.

  Examples of the alkali metal salt used in the first agent include sodium chloride, potassium chloride, sodium sulfate, and sodium chloride or potassium chloride is particularly preferable. The said alkali metal salt can be used in 1 or more types and arbitrary combinations, and 0.1-20 weight% is preferable in a 1st agent, and 0.4-10 weight% is more preferable.

  Further, ascorbic acid and its salt, cysteine and its salt are preferably added to the first agent as a stabilizer. The pH of the first agent is preferably adjusted to 2.0 to 11.0, and more preferably adjusted to 4.0 to 8.0. The pH may be adjusted with 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, but the penetration enhancer 1,2-penta can be used. Diol, 2-methyl-2,4-pentadiol, etc. may also be used as the solvent.

(B) Second agent The second agent contains an iron salt.
Examples of the iron salt include ferrous sulfate, ferric sulfate, ferrous hydrochloride, ferric hydrochloride, ferrous acetate, and ferric acetate. One or more of the above iron salts can be used in any combination. Among these iron salts, ferrous sulfate is particularly preferable. 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.

  Moreover, in the 2nd agent, it is preferable to add ascorbic acid and its salt in order to prevent the oxidation of an iron salt. As for the compounding quantity of ascorbic acid and its salt, it is preferable to add 0.01 to 10.0 weight% in a 2nd agent, and it is more preferable to add 0.1 to 5.0 weight%. Moreover, it is preferable to adjust pH of a 2nd agent to 2.0-9.0, and it is more preferable to adjust to 2.5-6.5.

  Furthermore, in order to mask the metal odor peculiar to an iron salt, it is preferable to add 0.01 to 10.0 weight% of tea dry distillation liquid, and it is more preferable to add 0.1 to 5.0 weight%.

The two-component hair dye of the present invention is used in combination with the first agent and the second agent of the present invention.
The dosage form of the first agent and the second agent is not particularly limited. For example, it can be a cream, liquid, gel, emulsion, spray, aerosol type or the like. Of these, the aerosol type is preferable. The dosage form of the first agent and the dosage form of the second agent may be the same or different. The 1st agent and the 2nd agent can further contain a publicly known ingredient required for formulation which can be chosen according to the kind of each dosage form.
What is necessary is just to set suitably as a well-known component required for formulation for every kind of dosage form. Taking an aerosol-type dosage form as an example, it is manufactured by filling a pressure-resistant container with a first agent or a second agent and a compressed gas, a surfactant, a thickener and / or a liquefied gas in an anaerobic atmosphere. do it. The compressed gas used here is preferably nitrogen, carbonic acid, argon or the like. Other dosage forms may be prepared according to known methods.

[Hair dyeing method]
In the hair dyeing method of the present invention, the hair dye composition containing the first agent and the second agent of the present invention is applied to hair, left for a certain period of time, and then washed away. The first agent and the second agent may be applied to the hair simultaneously or separately. More specifically, the first hair dyeing method is a method in which the first agent and the second agent are simultaneously applied to the hair, left for a certain period of time, and then washed away. The second hair dyeing method is a method in which the first agent is applied to the hair and allowed to stand for a certain period of time, then the second agent is applied to the hair, and further washed after being left for a certain period of time. Further, the order of the first agent and the second agent may be reversed.

Application to hair can be performed according to a known method, and specific examples include a method of applying directly to hair, a method of applying to hair using tools such as hands or a brush, and the like.
The time for leaving the first agent and the second agent can be set as appropriate. Moreover, what is necessary is just to use a well-known method for the method of washing away the 1st agent and the 2nd agent.

  The amount of the hair dye composition 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.
Two-component hair dyes of Examples and Comparative Examples of the present invention were prepared with the compositions shown in Table 1. The pH of each agent is also shown in Table 1.
Using the two-component hair dyes of these Examples and Comparative Examples, a hair dyeing test was performed as follows.
2.0 g of the first and second agents prepared in Examples and Comparative Examples were mixed and mixed, and uniformly applied to 8 cm (0.4 g) of human white hair BM-WA (Burelux). After standing for 30 minutes at room temperature, it was washed with a 3% sodium laureth sulfate solution and air-dried.
Lab of the stained part of human white hair was measured using a color reader CR-13 (manufactured by Konica Minolta). The measurement results are shown in Table 1. Here, the ΔL value indicates the difference between the color tone of human white hair (primary hair) before dyeing and the brightness of human white hair after dyeing.

  As shown in Table 1, about Examples 1-7 which contain alkali metal salt in the 1st agent, (DELTA) L value is larger than 15, and it turns out that the hair dyeing effect is high. Also, visually, Examples 1 to 7 were clearly darkly stained.

  Further, two-component hair dyes using hematein as a substance that develops color by reacting with iron were prepared with compositions shown in Table 2 and Examples and Comparative Examples. Table 2 shows the results of the hair dyeing test performed in the same manner as described above.

  As shown in Table 2, the ΔL value is larger than 15 for Examples 8 and 9 containing an alkali metal salt in the first agent even if the material that reacts with iron and changes color to hematein is contained. It turns out that the hair dyeing effect is high. Also, visually, Examples 8 and 9 were clearly darkly stained visually.

Claims (4)

(A) a two-part hair dye comprising a first agent containing a substance that develops color by reacting with iron, and (b) a second agent containing an iron salt,
The first agent contains an alkali metal salt.   The two-component hair dye according to claim 1, wherein the alkali metal salt is sodium chloride or potassium chloride.   The two-component hair dye according to claim 1 or 2, wherein the alkali metal salt is contained in an amount of 0.1 to 20% by weight based on the total amount of the first agent.   The two-component hair dye according to claim 1 or 2, wherein the substance that develops color by reacting with iron is at least one selected from tannic acid, gallic acid, and tannic acid.