WO2006011228A1

WO2006011228A1 - Hair dye and process for producing the same

Info

Publication number: WO2006011228A1
Application number: PCT/JP2004/010931
Authority: WO
Inventors: Tsutomu Kawata
Original assignee: Tsutomu Kawata
Priority date: 2004-07-30
Filing date: 2004-07-30
Publication date: 2006-02-02
Also published as: KR100838677B1; JPWO2006011228A1; JP3881688B2; KR20070035064A

Abstract

A hair dye obtained by providing an emulsion substrate material wherein an oil component is emulsified in a water soluble component having been acidified with citric acid and dissolving silver sulfate being a hardly soluble silver salt in the emulsion substrate material. When this hair dye is applied to the head hair and exposed to light such as ultraviolet or visible light, silver ions dissolved in the hair dye are reduced to metallic silver and microparticles of the reduced metallic silver deposit on and adhere to the hair surface, thereby developing color.

Description

Specification

Hair dye and method for producing the same

Technical field

The present invention relates to a hair dye that can be easily dyed and a method for producing the same.

Background art

[0002] Temporary hair coloring that is temporarily colored, such as a color spray or a color stick, is first used to dye hair. In addition, there are semi-permanent hair dyes that use ionic bonds between hair proteins and acid dyes, called hair manicures, color rinses, and color treatments, and oxidative hair dyes such as hair colors, hair dyes, and hair dyes. Recently, oxidative hair dyes tend to be preferred due to high durability of dyed colors (see Patent Document 1).

[0003] The above-mentioned oxidative hair dye includes, for example, a first liquid obtained by adding an alkaline agent such as ammonia to an oxidation dye such as para-phenylenediamine or toluene 1-2.5-diamin, and an oxidation such as hydrogen peroxide. And a second liquid composed of an agent. In use, mix the two liquids just before trying to dye the hair, and apply the mixed liquid to the hair. In hair dyeing with an oxidative hair dye, the oxidative dye that has penetrated into the hair undergoes oxidative polymerization by 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.

[0004] On the other hand, hair dyes that use silver salts such as silver nitrate, silver lactate, sparingly soluble silver sulfate, and silver acetate and dye by reactive oxidation with light have also been proposed (Patent Document 2, Patent Document). (See 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 been proposed (see Patent Document 4). In addition, a hair dyeing method using an ethanolamine silver complex salt and a diamine dye has been proposed (see Patent Document 5).

[0005] It should be noted that the applicant did not find any 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. . Patent Document 1: Japanese Patent Laid-Open No. 10-175830

Patent Document 2: JP 2002-348221 A

Patent Document 3: JP-A-52-125638

Patent Document 4: Japanese Patent Laid-Open No. 48-018438

Patent Document 5: Japanese Patent Laid-Open No. 4-312514

Disclosure of the invention

Problems to be solved by the invention

[0006] However, the above-mentioned oxidative hair dye needs to be mixed with two liquids immediately before use, and thus takes time and has a problem of ammonia odor. In addition, oxidative dyes composed of diamine substances and this polymer can cause carcinogenicity, liver damage, effects on the human health, such as effects on the fetus, and hair damage caused by alkalis and oxidation reactions. Has been pointed out.

[0007] In addition, those using silver salt have a very unstable silver salt aqueous solution, so when left in a container, they naturally color black and adhere to hair or adherence. There are problems such as low robustness.

The present invention has been made to solve the above-described problems, and an object of the present invention is to enable hair dyeing more easily and stably.

Means for solving the problem

[0008] In order to solve the above-described problems, the hair dye according to the present invention is such that silver sulfate and citrate are mixed in a substrate material having moisture.

Therefore, the hair dye contains silver sulfate, which is a silver salt that is reduced by irradiation with ultraviolet rays or visible light to precipitate metallic silver, in the state of an aqueous solution.

Further, the method for producing a hair dye according to the present invention is such that silver sulfate is added to an aqueous solution in which citrate is dissolved, so that the substrate material having moisture is mixed with silver sulfate and citrate. is there.

Therefore, the hair dye can be produced without the silver salt being precipitated.

The invention's effect [0009] As described above, according to the present invention, the hair dye contains a silver salt that is reduced by ultraviolet irradiation or the like to precipitate metallic silver in a water-soluble state acidified with citrate. Therefore, hair can be dyed by simply applying the above hair coloring to the hair. In addition, since the acid region is formed by using citrate, oxidation due to the soot reaction is suppressed, and a state in which silver sulfate 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. In addition, it does not affect the health of the human body due to the smell of ammonia, nor does it damage the hair due to alkalis or oxidation reactions.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described.

In the hair dye of the present embodiment, a predetermined substrate material having moisture is made acidic with citrate, and water (silver salt), which is a water-soluble silver salt, is mixed (added) to the substrate material. Silver sulfate is dissolved in the prepared substrate material. 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.

[0011] 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 metallic silver, and the reduced metallic silver The fine particles are deposited on the hair surface and become colored. The hair dyed in this way does not show any change in the coloration of the hair in normal hair washing. Metallic silver deposited by 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 during hair washing.

[0012] Silver sulfate (Ag 2 SO 4) is a white solid with a molecular weight of 311.79 and has low solubility in water.

It is 0.8% at 20 ° C, and the solubility is slightly improved by acidification and the presence of alcohol. For example, the solubility is improved to about 0.9% by making it acidic. When the concentration of the dissolved silver salt is as low as 0.4-0. 6%, the hair becomes colored with redness. For example, when applied to gray hair, when the silver salt concentration is about 0.4 to 0.6%, the hair is dyed from pink to reddish brown and not too dark brown. Les. However, light brown is sometimes preferred when the target of hair dye is female.

[0013] In order to obtain an acidic state, it is only necessary to add an acid. For example, strong acids such as sulfuric acid and nitric acid are not suitable for hair dyes used in the human body. Also, hydrochloric acid cannot be used because it produces salty silver.

In contrast to the strong acids described above, weak acids do not form salts that do not affect the human body, and are therefore suitable as materials to be added to make them acidic. However, acetic acid, for example, has a strong odor and is not suitable as a material to be added to the hair dye.

[0014] In contrast to the above knowledge, the above-described problems do not occur as materials for making the acid as described above, such as citrate, malic acid, lactic acid, and glycolic acid.

When these materials were prepared, it was confirmed that when silver sulfate was added to a base material acidified with malic acid, lactic acid, glycolic acid, etc., it gradually colored at the time of production or over time. Depending on the acid used, precipitates were confirmed after production.

[0015] On the other hand, when an acidic region was formed using citrate, a state in which silver sulfate was dissolved in a stable state without causing coloration was obtained. When using succinic acid, the solubility of silver sulfate can be increased to 0.9%. Here, it goes without saying that sodium quenate may be used as a buffering agent.

In addition, the silver salt aqueous solution has a very unstable force. As described above, by adding citrate to make it an acidic region, a stable state can be obtained and the soot reaction of blackening upon standing can be suppressed. Become.

[0016] When kenic 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 of the present embodiment, pH 4.0 or less is set with citrate, so that the oxidation of the dissolved silver salt is suppressed and the black color that is not combined with a reducing substance such as sulfur is used. Production of silver oxide can be suppressed. For example, even if the above hair dye is stored at a high temperature of 40 ° C or higher, coloring does not occur (habit reaction). However, it is necessary to add silver sulfate in a state where citrate is added in advance. No effect can be obtained by adding citrate after dissolving the silver sulfate. [0017] On the other hand, when the acid is not made acidic by the citrate and is in the alkaline region, the silver ions are left at room temperature (for example, 20-25 ° C) even if the light is blocked. Will gradually oxidize to form silver oxide and gradually blacken. In this case, when sulfur is added as a reducing agent, the soot reaction can be suppressed even in the alkaline region. However, when sulfur is added in the alkaline region, the reactivity (sensitivity) to light decreases.

[0018] It should be noted that even if silver sulfate is dissolved in an amount of about 0.5 to 0.9%, the above-described hair dyeing state can be obtained if it is an aqueous solution. However, in the state where silver ions are hardly generated, for example, in a state where silver sulfate is dispersed in the oil component, the above-described hair dyeing effect in which the reaction by light is very slow cannot be obtained.

[0019] Next, a method for producing the above-described hair dye will be described.

First, a preparation A is prepared using the following components.

In a vacuum emulsification kettle, add 81.4 kg of purified water and heat to 90 ° C. Add kuenic acid to make it acidic, add 0.6 kg of silver sulfate, and stir the silver sulfate. To make product A. Here, an equivalent amount of sodium quenate may be added as a buffering agent.

[0020] Next, the following components are mixed to prepare a product B.

? Contains Yone Soda, 12-year-old silicone silicone, 4 kg cetanol, 5 kg of sonorebitan stearate, 0.3 kg of stearyldimethylammonium chloride, 0.1 kg of methylparaben, and heat them to 80 ° C. Dissolve each to make Preparation B.

[0021] Next, the product A contained 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, stir the contents of the vacuum emulsifier for 8 minutes with a 3000 rpm homomixer, and then cool the contents to 35 ° C while reducing the stirring speed.

[0022] Finally, the emulsion obtained by mixing product A and product B as described above is filtered through a 20-mesh filter to obtain 98 kg of white cream (hair dye).

In these preparations, there is no precipitation of metallic silver due to reduction in a state where light is almost blocked. Do it.

[0023] The obtained white 'creamy hair dye has a pH of about 4. When this hair dye is left at room temperature with the light blocked, it is stable without blackening for more than 10 months. In addition, even if this hair dye is left at 40 ° C with the light blocked, it is stable without blackening for more than 6 months.

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 by, for example, 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 to precipitate metallic silver, and the precipitated metallic silver is applied to the hair. Adhere to. In this way, metallic silver precipitates and adheres to the hair, so that the hair is dyed. Part of the metallic silver deposited on the hair reacts with the hair in the hair and changes to black silver sulfide, or is gradually oxidized by oxygen in the air and changes to black silver oxide. It is also expected.

[0025] The hair dye of the present invention is prepared by mixing silver, which is used to dye hair, as a silver salt, and is applied to the hair in a dissolved state in water, that is, in a state of water-soluble silver ions. . As a result, according to the hair dye of the present invention, the silver is easily penetrated into the hair, and the metal silver fine particles are deposited in the state of contact with the hair surface or inside the hair, so that the color is fixed. It is easy to do. Also, since it does not contain diamine or lead, it does not cause an allergic reaction or harm health. Furthermore, according to the hair dye of the present invention, it can be expected that the metallic silver coats the hair surface, so that the hair is protected, and of course, the hair is not damaged.

[0026] According to the hair dye of the present invention described above, the hair at the stage where the hair dye is applied is not dyed, but precipitates as silver metal in which the silver ions in the hair dye are reduced. At this stage, the hair is dyed.

By the way, in the above description, the hair dye is prepared by dissolving silver sulfate in the emulsion base material.

However, it is not limited to this. For example, a hair dye may be obtained by dissolving silver sulfate in a substrate material formed as a gel in which a polymer material is dispersed in a predetermined dispersion medium.

[0027] For example, 82. lkg of purified water, 0.1 kg of citrate, 0.1 kg of sodium quenate and 0.1 kg of silver sulfate 6 kg was dissolved, and carboxyvinyl polymer 0.5 kg, polyvinylpyrrolidone derivative quaternary ammonium salt 0.5 kg, triisopropanolamine 0.8 kg, ethanol 14. Ok g, polyoxyethylene lauryl ether (23 kg) · ○) Add 0 · 8 kg and 0 · 5 kg of ethylparaben to obtain a transparent gel and use it as a hair dye. Naturally, even in the production of this hair dye, it should be ensured that there is no precipitation of metallic silver due to reduction or reduction while light is almost blocked.

An aqueous solution in which a predetermined fragrance is dissolved may be used as the substrate material.

When a milky liquid is used as a substrate material, it is generally referred to as a hair cream, and when a gel is used as a substrate material, it is generally referred to as a hair gel. Further, when an aqueous solution is used as the substrate material, it is referred to as a hair lotion, and when a highly viscous emulsion is used as the substrate material, it is referred to as a hair wax. Moreover, these hair dyes can be provided as, for example, a so-called hair mousse (registered trademark) in the form of a cream filled in a spray can.

In addition, 0.01 to 0.5% of colloidal sulfur may be added to the above hair dye. By adding and mixing colloidal sulfur, the coloring by the hair dye becomes darker.

Claims

The scope of the claims

[1] a substrate material having moisture;

Silver sulfate and citrate mixed with this matrix material

Hair dye characterized by being composed.

[2] In the hair dye according to claim 1,

Colloidal sulfur is mixed in the substrate material

Hair dye characterized by that.

[3] In the hair dye according to claim 1,

The hair dye characterized in that the substrate material is a milky liquid in which an oil component is emulsified in a water-soluble component.

[4] In the hair dye according to claim 1,

The hair dye characterized in that the substrate material is a gel in which a polymer material is dispersed in a predetermined dispersion medium.

[5] In the hair dye according to claim 1,

The hair dye characterized in that the substrate material is an aqueous solution.

[6] A method for producing a hair dye composed of a substrate material having moisture, and silver sulfate and quenoic acid mixed in the substrate material,

Add silver sulfate to an aqueous solution in which citrate is dissolved.

The manufacturing method of the hair dye characterized by the above-mentioned.