JP2008280321A - Hair dye and production method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hair dye safely dying the hair more easily on stable conditions against the conventional hair dyes weak in fastness and giving unpreferable effect on human body health aspects and environments. <P>SOLUTION: A silver colloid-L-amino acid complex solution produced by mixing a silver colloid solution with an L-amino acid such as L-histidine is used, wherein the silver colloid solution is produced by mixing finely granulated silver having a smaller diameter than the predetermined particle diameter, with a liquid. The objective hair dye is provided by mixing the silver colloid complex and citric acid, with a substrate material comprising moisture. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hair dye capable of easily dyeing hair and a method for producing the same.

  First, there are temporary hair dyes for temporarily coloring the hair, such as color sprays and color sticks. In addition, there are semi-permanent hair dyes that use ionic bonds between hair proteins and acid dyes, which are called hair manicures, color rinses, and color treatments, and oxidative hair dyes that are typified by hair colors, hair dyes, and white hair dyes. Recently, there is a tendency that an oxidative hair dye is preferred due to high durability of the dyed color (see Patent Document 1).

  The oxidative hair dye is, for example, a first liquid in which an alkaline agent such as ammonia is added to an oxidative dye such as paraphenylene diamine or toluene-2,5-diamine, and a second oxidant such as hydrogen peroxide. It is composed of liquid. In use, the two liquids are mixed just before hair is dyed, and the mixed liquid is applied to the hair. In hair dyeing with an oxidative hair dye, the oxidative dye that has penetrated into the hair undergoes oxidative polymerization with the added oxidant, and an insoluble pigment is produced by the oxidative polymerization, and the insoluble pigment produced is fixed in the hair. The hair is dyed.

On the other hand, hair dyes that use silver salts such as silver nitrate, silver lactate, sparingly soluble silver sulfate, silver acetate, and the like to dye by light reaction or oxidation have also been proposed (see Patent Document 2 and Patent Document 3). In addition, a hair dyeing method using two liquids in which ammonia silver complex salt or ethanolamine silver complex salt solution is attached to hair and then dyed with a reducing agent has also been proposed (see Patent Document 4). Moreover, the hair dyeing method using ethanolamine silver complex salt and diamine type dye is also proposed (refer patent document 5).
In addition, it has been proposed to add citric acid to stabilize hair dyeing, but there was also anxiety about health by using silver sulfate (see Patent Document 6).

The applicant has not yet found prior art documents related to the present invention by the time of filing other than the prior art documents specified by the prior art document information described in this specification.
JP 10-175330 A JP 2002-348221 A JP-A-52-125638 JP-A-48-018438 Japanese Patent Laid-Open No. 4-31514 JP 2007-3881688 A

  However, the above-mentioned oxidative hair dye needs to mix two liquids immediately before use, and thus takes time and has problems such as ammonia odor. In addition, oxidative dyes made of diamine-based substances and this polymer can cause carcinogenicity, liver damage, effects on the health of the human body, such as effects on the fetus, and hair damage caused by alkalis and oxidation reactions. Has been pointed out.

Also, those using silver salts such as silver nitrate, silver lactate, sparingly soluble silver sulfate, and silver acetate are very unstable in silver salt aqueous solution. Therefore, there is a problem that the adhesion ability to the hair and the fastness of the attached state are lowered.
Furthermore, those using strong acid salts such as silver nitrate and silver sulfate have major problems such as the influence on the health of the human body due to the liberated strong acid and the burden on the environment.
The present invention has been made to solve the above-described problems, and it is an object of the present invention to make it possible to more easily and safely dye hair in a stable state.

In order to solve the above-mentioned problems, the hair dye according to the present invention comprises a colloidal silver solution produced by mixing finely divided silver below a set particle size in a liquid, and L-histidine, L-cysteine, L- A stable silver colloid-L-amino acid complex solution produced by mixing any one L-amino acid among arginine, L-methionine, and L-lysine is used. This silver colloid complex and citric acid are mixed in a substrate material having moisture.
Therefore, the hair dye contains a silver colloid complex, which is a silver salt that is reduced by irradiation with ultraviolet rays or visible light to deposit metallic silver, in an aqueous solution state.

Further, the method for producing a hair dye according to the present invention is such that the silver colloid complex and citric acid are mixed with the substrate material having moisture by adding the silver colloid complex to an aqueous solution in which citric acid is dissolved. It is a thing.
Therefore, a hair dye can be produced without depositing metallic silver during the production process. In addition, since the silver colloidal complex can stably contain silver in a solution up to a 20% silver concentration, it is possible to produce a hair dye containing silver at a concentration 10 times or more that of conventional hair dyes. It is.

As described above, in the present invention, the hair colorant is stably contained in a water-soluble state made acidic by citric acid, which is a silver colloid complex that is reduced by irradiation with ultraviolet rays or the like to precipitate metallic silver. Therefore, it is possible to dye hair by simply applying the hair dye to the hair. Moreover, by using the stabilized silver colloid complex and citric acid as the acidic region, oxidation by dark reaction is suppressed, and a state in which the silver colloid complex is stably dissolved is obtained.
As described above, according to the present invention, hair can be easily dyed, for example, it is not necessary to mix the two liquids immediately before use. Moreover, since there is no ammonia smell or free strong acid, there is no influence on the health and environment of the human body, and there is no damage to the hair due to alkali or oxidation reaction.

Hereinafter, embodiments of the present invention will be described.
The hair dye of the present embodiment uses a stabilized finely divided silver colloid and an L-amino acid complex solution. A predetermined substrate material having moisture is made acidic with citric acid, and the above silver colloid complex solution, which is a water-soluble silver salt, is mixed (added) to this substrate material, and the silver colloid complex is stably added to the substrate material. Is in a dissolved state.

The substrate material may be an emulsion in which an oil component is emulsified in a water-soluble component. The substrate material may be a gel in which a polymer material is dispersed in a predetermined dispersion medium, or an aqueous solution containing alcohol. The hair dye comprising the silver colloid complex and citric acid of the present invention can be easily dyed with the stable silver colloid complex. It can also be used as a natural hair dye that does not adversely affect human health and the environment.
Hereinafter, details of the present invention will be described based on examples.

Next, the manufacturing method of the hair dye mentioned above is demonstrated.
As shown in FIG. 1, first, silver is finely divided to a set particle diameter (for example, 4 nm) or less by a technique such as electrolysis (S1), and the finely divided silver 1 is mixed and dispersed in the liquid 2 (S2). Then, a silver colloid solution 3 is generated (S3). In this case, the concentration of the finely divided silver 1 is adjusted so that the silver colloid solution 3 has a predetermined concentration (for example, 0.2 to 2.0%) necessary for hair dyeing. Further, the silver colloid solution 3 prevents silver ions from being reduced by dispersing the finely divided silver 1 in the liquid 2 having few negative ions.

  A silver colloid complex solution 5 is produced by adding L-amino acid (L-histidine) 4 at a 1/10 concentration of silver to the prepared silver colloid solution 3 for stabilization (S4). The silver colloid complex solution 5 thus produced contains a predetermined concentration (for example, 0.2 to 2.0%) of finely divided silver 1.

Using this silver colloid complex solution 5, a product A is prepared from the following components.
In a vacuum emulsification pot, add 81.4 kg of purified water and heat to 90 ° C., add citric acid to make it acidic and add the silver colloid complex solution (0.6 kg as silver). Then, the mixture is dissolved by stirring to obtain a product A. Here, an equivalent amount of sodium citrate may be added as a buffering agent.

Next, the following components are mixed to prepare a product B.
An oil tank kettle contains 12 kg of silicone oil, 4 kg of cetanol, 15 kg of sorbitan stearate, 0.3 kg of stearyldimethylammonium chloride, and 0.1 kg of methylparaben, which are heated to 80 ° C. and dissolved to prepare product B. .

  Next, the product A stored in the vacuum emulsification kettle is kept at 80 ° C., and this is vigorously stirred. The product B is gradually added to the stirred state. Next, after all the product B is added to the product A, the vacuum emulsification pot is sealed to create a reduced pressure environment. After the reduced pressure environment, the contents of the vacuum emulsification pot are stirred for 8 minutes by a 3000 rpm homomixer, and then the temperature of the contents is cooled to 35 ° C. while the stirring speed is reduced.

Finally, the emulsion obtained by mixing the product A and the product B as described above is filtered through a 20 mesh filter to obtain 98 kg of white cream (hair dye).
These preparations are performed in a state where light is almost blocked so that there is no precipitation of metallic silver due to reduction.

  The obtained self-colored and creamy hair dye has a pH of about 6. When this hair dye is allowed to stand at room temperature with light blocked, it is stable without being blackened for more than 10 months. Moreover, even if this hair dye is allowed to stand at 40 ° C. while blocking light, it is stable without blackening for 6 months or more.

  When the hair dye is applied to the hair and irradiated with light such as ultraviolet rays or visible light, the silver ions dissolved in the hair dye are reduced to metal silver, and the reduced metal silver fine particles are added to the hair. Colored by depositing and adhering to the surface. In the hair dyed in this way, no change is observed in the coloration of the hair in ordinary hair washing. The metallic silver deposited by the light irradiation and adhering to the surface of the hair is considered to be strong enough not to be detached from the surface of the hair when washing the hair.

  When the concentration of dissolved silver is as low as about 0.4 to 0.6%, the hair becomes colored with redness. For example, when applied to gray hair, when the silver concentration is about 0.4 to 0.6%, the hair is dyed from pink to reddish brown and not so dark brown. However, when the target of hair dyeing is female, light brown may be preferred, and the color tone may be adjusted to some extent by the silver concentration.

Since the silver colloid complex solution used retains silver with the amino group and carbonyl group of the L-amino acid, the silver can be stably present in the solution by the L-amino acid.
A normal silver salt aqueous solution is very unstable. However, as described above, a stable state can be obtained by adding a stabilized silver colloid complex solution and citric acid. It becomes possible to suppress.

When a simple silver salt solution is used, or when citric acid is not used, blackening gradually proceeds even when stored in a dark place, and the ability to adhere to hair and fastness are reduced.
On the other hand, in the hair dye in this Embodiment, the oxidation of the silver salt which melt | dissolved is suppressed and the production | generation of black silver oxide can be suppressed, without combining with reducing substances, such as sulfur. For example, even if the hair dye is stored at a high temperature of 40 ° C. or higher, coloring (dark reaction) does not occur.

Next, the hair dyeing action of the hair dye of the present invention described above will be described in more detail.
The hair dye of the present invention is obtained, for example, by mixing a water-soluble silver salt of silver sulfate with a substrate material having moisture such as a hair cream. When such a hair dye is applied to the hair and the hair is exposed to sunlight (ultraviolet rays) in this state, the silver ions in the hair dye are reduced by light and metal silver is deposited, and the deposited metal silver adheres to the hair. To do. Thus, the metal silver is deposited and adhered to the hair, so that the hair is dyed. Part of the metallic silver deposited on the hair reacts with sulfur in the hair and changes to black silver sulfide, or is gradually oxidized by oxygen in the air and changes to black silver oxide. Is also expected.

  The hair dye of the present invention is a mixture of silver, which is the basis for dyeing hair, as a stabilized silver colloid complex, and is applied to the hair in a dissolved state in water, that is, in the form of water-soluble silver ions. is there. As a result, according to the hair dye of the present invention, the silver is easily penetrated into the hair, and since the metal silver fine particles are deposited in the state of contact with the hair surface or inside the hair, the color is fixed. It is easy. Moreover, since it does not contain diamine or lead, it does not cause allergic reactions or harm health. Furthermore, according to the hair dye of the present invention, the protective effect of hair by coating the surface of the hair with metallic silver can be expected and, of course, the hair and the like are not damaged.

According to the hair dye of the present invention described above, the hair at the stage where the hair dye is applied is not in a dyed state, but at the stage where silver ions in the hair dye are deposited as reduced metallic silver. The hair is dyed.
In the above description, the hair dye is prepared by dissolving silver sulfate in an emulsion base material. However, the present invention is not limited to this. For example, the colloidal silver complex may be dissolved in a matrix material in which a polymer material is dispersed in a predetermined dispersion medium to form a hair dye.

For example, a transparent gel hair dye using a carboxyvinyl polymer as a substrate material, a hair cream using a milky liquid, a hair lotion using an aqueous solution, and a hair wax using a highly viscous emulsion. .
Of course, in the production of these hair dyes, it is carried out in a state where light is almost blocked so that there is no precipitation of metallic silver due to reduction.

  The hair dye of the present invention is a mixture of silver, which is the basis for dyeing hair, as a stabilized silver colloid complex, and is applied to the hair in a dissolved state in water, that is, in the form of water-soluble silver ions. is there. As a result, according to the hair dye of the present invention, the silver is easily penetrated into the hair, and since the metal silver fine particles are deposited in the state of contact with the hair surface or inside the hair, the color is fixed. It is easy. Moreover, since it does not contain diamine, lead, strong acid, etc., it does not cause allergic reaction or harm health. Furthermore, the hair dye of the present invention can be used as a natural hair dye that can be expected to have an effect of protecting hair by covering the hair surface with metallic silver and does not adversely affect the health of the human body or the environment.

The Example of this invention is shown and the silver colloid complex solution formation process which comprises the natural hair dye which is the objective is shown.

Explanation of symbols

1. 1. Finely divided silver Liquid 3. 3. Silver colloid solution L-amino acid (L-histidine)
5. Silver colloid-L-amino acid (L-histidine) complex solution S1. Silver micronization process S2. Mixing finely divided silver into liquid S3. Silver colloid solution generation process S4. Formation process of silver colloid-L-amino acid (L-histidine) complex solution

Claims (6)

  A substrate having water using a colloidal silver solution produced by mixing finely divided silver into a liquid having a particle size equal to or smaller than a set particle size and a stable silver colloid-L-amino acid complex solution produced by mixing L-amino acid therein A hair dye comprising a material, and the silver colloid complex and citric acid mixed in the substrate material.   The hair dye according to claim 1, wherein the L-amino acid is one of L-histidine, L-cysteine, L-arginine, L-methionine, and L-lysine. .   The hair dye according to claim 1, wherein the substrate material is a milky liquid in which an oil component is emulsified in a water-soluble component.   The hair dye according to claim 1, wherein the substrate material is a gel in which a polymer material is dispersed in a predetermined dispersion medium.   The hair dye according to claim 1, wherein the substrate material is an aqueous solution.   A method for producing a hair dye comprising a substrate material having moisture using a silver colloid complex, a silver colloid complex mixed with the substrate material, and citric acid, and an aqueous solution in which citric acid is dissolved A method for producing a hair dye, comprising adding the silver colloid complex to the hair dye.

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