JPH08157345A - Method for decoloring and dyeing hair and viscous liquid for decoloring and dyeing hair - Google Patents

Abstract

PURPOSE: To provide a method for decoloring hair and simultaneously dyeing the hair into a desired color, and to obtain the liquid used for decoloring and dyeing the hair in the method. CONSTITUTION: The method for decoloring and dyeing the hair comprises mixing the first liquid comprising a solution containing an acidic dyestuff, an alkali and a high molecular thickening agent (which may be divided into the first A liquid comprising the alkali and the high molecular thickening agent and the first B liquid comprising a solution containing the acidic dyestuff and the high molecular thickening agent) with the second liquid comprising a solution containing hydrogen peroxide and having a pH of <=4 to prepare the viscous liquid having an acidic dyestuff concentration of 0.2-2.0%, an alkali concentration of 0.1-2.0N, a hydrogen peroxide concentration of 0.5-5.0%, a pH of >=9.0 and a viscosity of 1000-50000 centipoises, and immediately coating the viscous liquid on hair. The viscous liquid to be coated on the hair, having the acidic dyestuff concentration, the alkali concentration, the hydrogen peroxide concentration, the pH, and the viscosity, and used for decoloring and dyeing the hair as mentioned above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to decolorize pigments contained in hair such as melanin pigments when dyeing human black hair or dark hair to a light color or a color away from the original hue. The present invention relates to a hair bleaching and dyeing method for dyeing a color, and a viscous liquid for hair bleaching and dyeing used in the hair bleaching and dyeing method.

[0002]

2. Description of the Related Art Conventionally, a. A method using an oxidation type dye and an oxidizing agent, b. A method using an acid dye and a dyeing aid, c. Method using pigments and fixing agents,
D. There is a method of using a natural organic dye or a metal salt or a method of using them in combination.

The method (i) is usually called hair dye, and the dyeing mechanism is such that a low molecular weight dye intermediate is permeated into the hair.
It is a substance that is oxidatively polymerized in the hair to produce a pigment,
Oxidation produces an insoluble dye, which is excellent in durability, and oxidation causes hair dye to be decolorized so that it can be dyed in a bright color. In other words, this method is widely used because it can be used for dyeing gray hair and increasing the tone of black hair. On the other hand, the dye intermediate used is mainly one having a strong sensitizing property such as p-phenylene cyamine, and a patch test before use is required by the Pharmaceutical Affairs Law. In addition, some medical personnel have reported that these substances have problems other than allergies.

The method of B is generally called hair nail polish and is a method of dyeing hair with an acid dye due to its ionicity. At this time, the dye solution is made acidic so that the hair is positively charged with respect to the minus of the dye. In addition, an organic solvent is added to swell the hair to enhance the dyeing effect. This method has come to be widely used in recent years because it can be used easily because it has a wide variety of colors and there is no concern for health, but on the other hand, it does not have a function to decolorize hair, so tone up black hair. Is less effective. Also, the method of Ha is not used except for special cases because of lack of shampoo resistance, and the method of D is not good in dyeing property.

[0005]

Recently, there has been an increasing demand for dyeing hair. In addition to the conventional gray hair dyeing technique, black hair is dyed in bright colors to give it a light feel. For this purpose, the use of hair dye as described above causes allergies and other health problems, and the effect of hair manicure is insufficient.
There is also a method of decolorizing the hair with a decolorizing agent in advance and then dyeing it with a hair nail polish, but the process is complicated and not general. An object of the present invention is to provide a decolorizing and dyeing method for black hair which has no health problems, is easy to perform, and can be dyed in a desired hue, and a viscous liquid for decolorizing and dyeing used in the method.

[0006]

A method for decolorizing and dyeing hair according to claim 1 of the present invention comprises a first solution of a solution containing at least one kind of acid dye, alkali and a polymeric thickener. , 2 of the second solution containing PH of 4 or less containing hydrogen peroxide
Mixing different types of solution, acid dye concentration 0.2 ~ 2.0
%, An alkali concentration of 0.1 to 2.0 N, a hydrogen peroxide concentration of 0.5 to 5.0%, a PH of 9.0 or more, and a viscosity of 1,000 to 50,000 centipoise. It is a method of immediately applying to hair and simultaneously dyeing the hair while decolorizing the melanin pigment of the hair.

The viscous liquid for simultaneously bleaching and dyeing hair must satisfy the above-mentioned quality and physical properties. Alkali concentration, hydrogen peroxide concentration, and /
Alternatively, if the pH is below the lower limit, the oxidizing power of the viscous liquid becomes weak and the hair cannot be sufficiently discolored. On the other hand, if the amount exceeds the upper limit, the oxidizing power becomes too strong, resulting in excessive bleaching or damage to the hair. In addition, the acid dye is oxidatively decolorized so that it does not dye to the desired color, and if the treatment time is shortened to prevent excess oxidative bleaching, the difference between the early and late parts of the treatment sequence becomes large and uneven coloration occurs. Occurs. Also, if the dye concentration falls below the lower limit of the above-mentioned quality and physical property conditions, the dyeability will deteriorate and the desired color will not be dyed. become.

Chemicals for decolorizing melanin pigments include oxidizing agents such as hydrogen peroxide, chlorine, bromine, hypochlorite, bromate, percarbonate, perborate, persulfate and permanganate. However, hydrogen peroxide solution is the most suitable in consideration of the effects on the human body, hair damage, and decolorizing ability. Hydrogen peroxide water is acidic and stable, and when it becomes alkaline, it decomposes to generate active oxygen and decolorizes the dye. Therefore, when hydrogen peroxide is used as an oxidizing agent, a solution containing an alkaline agent and an acidic hydrogen peroxide solution are prepared, and these are mixed immediately before use.

Acid dyes are more resistant to oxidation than melanin pigments, but are also somewhat decolorized by oxidation. Therefore, the first important point is to adjust the oxidizing power of the liquid to be treated to a level at which the melanin pigment is decolorized and the acid dye is not discolored. However, as a result of various studies, the present invention fully satisfies this point. It's what you get.

Many acid dyes are alkaline and change in quality, and when added to an alkaline solution, it is necessary to select a dye capable of withstanding them. Among the legal dyes related to cosmetics defined by the Pharmaceutical Affairs Law, Red No. 3, Red No. 1 and Red No. 1
05 No. 1, Red No. 106, Yellow No. 4, Red No. 227,
Red 230, 1 and 2, Red 231, Red 232
No. 1, Daidai No. 207, Yellow No. 1, No. 1, No. 2, Yellow 203, Red 401, Yellow 402, Yellow 403
No. 1, Yellow 406, Yellow 407, Green 401,
Black No. 401 can be used.

Suitable alkali agents used here are ammonia, ammonium carbonate, ammonium hydrogen carbonate, sodium carbonate, monoethanolamine, ammonium sulfate and the like. Since the strength of the oxidizing power of the solution depends on its pH and alkalinity, the selection of the alkali concentration and type is also important.

[0012] Since alkalis and oxidants easily cause damage to hair and skin, it is advisable to add polymer conditioners, hydrolyzed proteins, anti-inflammatory agents and the like to prevent them. The use of surfactants should be minimized as they can interfere with acid dyeing. In particular, cationic surfactants have a large inhibition of dyeing, so it is advisable to refrain from using them. For example, when adding fats and oils for the purpose of treating hair, a surfactant may be used for emulsification or solubilization of the fats and oils, but cationic substances should be avoided as much as possible, and It seems that the amount used is suppressed. In general, when additives are to be added, it is advisable to add them after considering that the dye inhibiting factors derived from them can be sufficiently eliminated.

Since hydrogen peroxide water is easily decomposed, it is desirable to adjust the pH to 2 to 4 in order to prevent it, and to add a chelating agent so as to block the metal ions serving as a catalyst for the decomposition reaction. Many hair treatment components are vulnerable to oxidation, but it is not always necessary to add them to the second liquid in which hydrogen peroxide coexists, so the other first liquid or the first liquid A or the first liquid B described below is used. It is better to add it to the liquid.

When a mixed solution for decolorizing and dyeing hair is applied to hair with a comb or a brush, the viscosity of the solution is 1000 to 500.
It is preferably 00 centipoise. If it is less than 1000 centipoise, there is dripping, which may stain the neck, clothes, floor, etc. Further, if it is 50,000 centipoise or more, it becomes difficult to apply it uniformly on the entire hair. A polymer thickener is desirable for viscosity adjustment.

However, the polymeric thickener is vulnerable to oxidation and is difficult to add to the second solution of the solution containing hydrogen peroxide, so it is added to a solution other than the second solution. For this reason, the viscosity of the first liquid becomes considerably high, and it tends to be slightly difficult when mixed with the second liquid having a low viscosity. Further, since the acid dye is added to the first liquid which is alkaline, the dye must be alkali resistant, and accordingly, the type of dye that can be used is limited. It is the invention according to claim 2 that easily solves these problems, and comprises a first solution A, which is a solution containing an alkali and a polymeric thickener, and a solution containing hydrogen peroxide and having a pH of 4 or less. And a second liquid, which is a solution containing one or more types of acid dyes and a polymeric thickener,
This is a method of mixing three kinds of solutions with the solution B to prepare a viscous solution having the same quality and physical properties as the viscous solution of the above-mentioned claim 1, and immediately applying it to the hair to simultaneously decolorize and dye the hair.

As described above, the thickener is added to the first liquid A and the first liquid B.
If added to both of the liquids and a viscous liquid having a predetermined viscosity is obtained when the both liquids and the second liquid are mixed,
The mixing operation for making the viscous liquid becomes easy. In this case, if the thickener added to the first liquid A and the thickener added to the first liquid B are made of different natural gums, the mixing operation becomes easier. The method of increasing the viscosity with a combination of surfactants is not preferable because it causes a decrease in dyeability. Further, since the dye is prepared in the first liquid B which does not coexist with alkali, it is not necessary to have alkali resistance, and the selection range of types is widened.

The invention of claim 3 is a mixture of the first liquid and the second liquid or a first liquid A to be used for hair treatment in the hair bleaching and dyeing method of the above-mentioned claim 1 or 2. ,
The acid dye concentration produced by mixing the first liquid B and the second liquid is 0.2 to 2.0%, and the alkali concentration is 0.1 to 2.
It is a viscous liquid of 0N, a hydrogen peroxide concentration of 0.5 to 5.0%, a PH of 9.0 or more, and a viscosity of 1,000 to 50,000 centipoise.

[0018]

Example 1 An example according to claim 1, and Table 1 below.
And the first liquid and the second liquid according to claim 1 having the respective compositions shown in Table 2.
Prepare by heating, mixing, and dissolving the liquid and the liquid, and then put the first liquid and the second liquid in a cup in a weight ratio of 1: 2, mix well with a comb with a brush, and mix to acidity. The dye concentration is 0.
A viscous liquid having a concentration of 4%, an alkali concentration of 0.8 N, a hydrogen peroxide concentration of 4.0%, a PH of 10.9 and a viscosity of 7,000 centipoise was obtained. And immediately, on the other hand, 5g of black hair
5 g of the viscous liquid was divided into several times and applied to a comb, and uniformly applied to a hair bundle made by bundling in the same direction and binding one end with a string. This was left at room temperature for 20 minutes, washed with warm water, drained with a dry towel, and dried with a dryer.

[0019]

[Table 1]

[0020]

[Table 2]

The tufts were moderately decolorized and dyed in the targeted orange color. In other words, the conventional method of decolorizing black hair with a depigmenting agent and then dyeing with a hair nail polish
Equivalent results to the one-step procedure were obtained with this one-step procedure. Among the components shown in Tables 1 and 2, oleic acid in Table 1 is a hair treatment agent,
Anhydrous sodium sulfite is an antioxidant, edetic acid tetrasodium tetrahydrate is a chelating agent, glycyrrhetinic acid ester is a skin anti-inflammatory agent, and anhydrous sodium pyrophosphate, edetate disodium and phenacetin in Table 2 are chelating agents and phosphoric acid. Is a pH regulator.

As a comparative test, one of the two-part type hair bleaching agents which are generally used at present is selected, and the one and two parts are mixed according to the manual for use, and the acid dye solution is subjected to the above test. This solution was added to give the same dye concentration, and a decolorization dyeing test was conducted in the same manner as the above test using this solution. As a result, with respect to decolorization, the same satisfactory result as in the above test was obtained, but the dyeing effect was remarkably inferior and the desired color could not be obtained. For reference, the compositions of the one-part and two-part hair bleaching agents used in this comparative test are shown in Tables 3 and 4 below.

[0023]

[Table 3]

[0024]

[Table 4]

[0025]

[Embodiment 2] This is an embodiment according to claim 2, and Table 5 below.
And the first liquid A and the first liquid B having the respective compositions shown in Table 6 and the second liquid shown in Table 2 of Example 1 were prepared in a usual manner, and they were each mixed in a ratio of 1: 1: 2. Mix in a cup in a weight ratio and stir with a comb with a brush. Mixing is easy, and acid dye concentration is 0.38%, alkali concentration is 0.6N, hydrogen peroxide concentration is 3.0%, and PH is 11%. ．
A viscous liquid having a viscosity of 0 and a viscosity of 9000 centipoise was obtained.
Immediately apply 50 g of this viscous liquid evenly to the black hair of a semi-long woman with a comb with a brush, cover with a transparent film cap, and use a far-infrared heater at 40 ° C for 10 minutes.
Heated for minutes. After cooling, the product was thoroughly washed with warm water to remove the attached dye, a treatment agent was applied and lightly washed with warm water, then water was removed with a towel and dried with a dryer.

[0026]

[Table 5]

[0027]

[Table 6]

The results showed that the hair had an almost targeted orange color, and the decolorizing power and dyeing power were appropriate. Moreover, no difference was observed in the appearance and feel of the hair such as luster, slippage, softness, and moisturizing feeling before and after the treatment. In other words, there was almost no hair damage. Of the components shown in Tables 5 and 6, oleyl alcohol in Table 5 is a hair treatment agent, anhydrous sodium sulfite is an antioxidant, tetrasodium edetate tetrahydrate is a chelating agent, and glycyrrhetinic acid ester is skin anti-inflammatory. And the phosphoric acid in Table 6 is PH
The regulator, paraoxybenzoate, is a preservative, and hyaluronic acid is a moisturizer for hair.

[0029]

As is apparent from the above, according to the present invention, the decolorizing operation of hair by the method according to claim 1 or 2 in which the viscous liquid according to claim 3 is used for hair treatment. Since it becomes possible to simultaneously perform a dyeing operation for a desired color with a simple operation without any problems in health and hygiene, the effect of improving and improving the hair dyeing technique is great.

Claims (3)

[Claims] 1. Two kinds, a first solution which is a solution containing at least one kind of acid dye, an alkali and a polymeric thickener, and a second solution which is a solution containing hydrogen peroxide and having a pH of 4 or less. Acid solution concentration is 0.2-2.0%, alkali concentration is 0.1-2.0 N, and hydrogen peroxide concentration is 0.5.
~ 5.0%, PH of 9.0 or more, and viscosity of 1000
A method for bleaching and dyeing hair, characterized in that a viscous liquid of up to 50,000 centipoise is prepared and immediately applied to the hair. 2. A first liquid A which is a solution containing an alkali and a polymeric thickener, a second liquid which is a solution containing hydrogen peroxide and having a PH of 4 or less, one or more acid dyes, and A hair characterized in that the viscous liquid according to claim 1 is prepared by mixing three kinds of solutions with the first solution B, which is a solution containing a polymeric thickener, and is immediately applied to the hair. Decolorization dyeing method 3. The acid dye concentration is 0.2 to 2.0%, the alkali concentration is 0.1 to 2.0 N, and the hydrogen peroxide concentration is 0.1.
5 to 5.0%, PH of 9.0 or more, and viscosity of 100
Viscous liquid for hair bleaching dyeing of 0 to 50,000 centipoise