JP2002338444A - How to dye human hair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for dyeing human hair, by which the hair can permanently be dyed without being damaged, even when the method is repeatedly applied. SOLUTION: This method for dyeing the human hair is characterized by comprising the following processes (A) to (F): (A) applying a 2 to 5 pH composition containing a reactive dye to the human hair, (B) leaving the hair for about 5 to 45 min, (C), if necessary, rinsing and then drying the hair, (D) applying an alkaline composition containing a peroxide to the hair, (E) leaving the hair for 5 to 30 min, and (F) rinsing or shampooing the dyed hair and then drying the hair.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention has good dyeing properties such as stability against light, shampooing and environmental influences, gives long lasting dyeing, and does not damage hair even when repeatedly applied. The present invention relates to a method for dyeing human hair.

[0002]

2. Description of the Related Art There are basically two methods for dyeing human hair. One such method is direct dyeing, which does not damage the hair when applied repeatedly.
However, since the direct dye only adheres to the hair surface, the dyeing lasts only for a short period of time, and disappears due to shampooing, frequent shampooing, and environmental influences.

Another method is dyeing by applying an oxidation dye composition. Since these substances react directly with the hair, they can give a permanent hair dye, but if they are repeatedly dyed in this way in a short time, they can damage the hair, especially in delicate hair.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method which allows permanent dyeing without damaging human hair.

[0005]

Means for Solving the Problems If the present inventors dye human hair by a method including the following steps (A) to (F), the hair is stable against environmental influences and shampoo treatment, and damages the hair. No permanent dyeing similar to that of an oxidation dye was obtained.

The present invention comprises the following steps (A) to (F): (A) a composition containing a reactive dye and having a pH of 2 to 5 is applied to human hair and (B) left for about 5 to 45 minutes (C) if necessary, rinse and dry, (D) apply an alkaline composition containing peroxide, (E) leave for 5-30 minutes,
(F) A method for dyeing human hair, characterized in that the dyed hair is rinsed or shampooed and dried.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The reactive dye used in the step (A) of the present invention is known as a dye component, has at least one active group in the molecule, and has a substrate (hair keratin in the case of the present invention). Reacts with the functional group in ()) and binds. Such reactive dyes usually have a hydrophilic group, and for example, those described in "Rompp Chemie Lexikon", 9th edition, pages 3805-3806 can be used. In the present invention,
Preferred reactive dyes have at least one vinylsulfonyl group or have at least one sulfatoethylsulfonyl group that separates sulfuric acid into a vinylsulfonyl group, which reacts with the active group of hair keratin. Things.

Particularly preferred reactive dyes are represented by the following formulas (1)
A compound represented by (15) or a salt thereof. Examples of the salt include a sodium salt, a potassium salt, an ammonium salt and the like.

[0009]

Embedded image

[0010]

Embedded image

[0011]

Embedded image

Also, reactive dyes having a heterocyclic group (which may have a halogen atom) such as triazine, pyrazine and pyrimidine are preferable. As the dyeing group, for example, a diazo group, anthraquinone, phthalocyanine and dioxazine structures are preferable.

The reactive dyes are incorporated into the bases usually used in hair dyes, preferably solutions, emulsions, gels, (foam) aerosols, for application to the hair. Bases include ingredients commonly used in such compositions, such as surfactants, thickeners, flavors, stabilizers, solubilizers, natural and / or synthetic polymers, complexing agents, and the like. , K. Schrad
The components described in “Grundlagen und Rezepturen der Kosmetika”, 2nd edition (1989), pages 796-798, etc., can be added.

The amount of the reactive dye in the composition applied to the hair varies depending on the structure and the desired dyeing strength, but is usually about 0.01 to 5% by weight, especially about 0.1 to 5% by weight in the total composition. It is preferably from 0.5 to 2.5% by weight, more preferably from about 0.1 to 1% by weight. For fine adjustment of color tone, a dye can be directly blended.

The pH of the composition is between pH 2 and 5, preferably between about 2.5 and 4. In this case, an organic carboxylic acid such as lactic acid, malic acid or citric acid, especially a hydroxy acid is added in an amount of 1 to 10
It is preferable to use a buffer system by using about% by weight. Further, it is preferable to use an aqueous base containing 5 to 50% by weight, particularly 10 to 40% by weight of a hydrophilic organic solvent known to exhibit a penetration promoting effect on an acidic dye. Examples of such a hydrophilic organic solvent include benzyl alcohol, benzyloxyethanol, propylene carbonate, and methylpyrrolidone. By using such an acidic base containing a hydrophilic organic solvent, the reactive dye effectively penetrates into the hair.

Such an acidic reactive dye composition is applied to human hair for about 5 to 45 minutes, preferably about 1 to 45 minutes.
Leave for 0 to 30 minutes (step (B)). This time can be reduced by heat treatment.

Between steps (B) and (D), ie between the application of the acidic reactive dye composition and the application of the alkaline composition, as step (C) the hair is rinsed and dried in the middle A step can be included.

The alkaline composition used in the step (D) includes, as peroxides, hydrogen peroxide, alkaline earth peroxides such as magnesium peroxide, and persulfates such as sodium persulfate and potassium persulfate. Containing p
H 7.5 to 12.5, particularly preferably pH 8 to 11. In particular, it is preferable to use a powdery composition containing a persulfate or the like and hydrogen peroxide in combination. Such a composition is used by being mixed with an aqueous hydrogen peroxide solution such as a 6% aqueous hydrogen peroxide solution before application. For example, K. Schrader
"Grundlagen und Rezepturen der Kosmetika" 2nd
The components described in the edition (1989), pp. 815-823 can be used.

Preferred alkali agents include ammonia, monoethanolamine, and alkali carbonates and alkali carbonates such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate and potassium hydrogen carbonate. Also,
Other alkaline agents such as diethanolamine, triethanolamine, other hydroxyalkanolamines can also be used.

The alkaline composition may be in the form of a solution, emulsion, dispersion, gel, (foam) aerosol, etc., and may further contain other components, such as conditioning agents, which are commonly used in such compositions. You can also.

After applying the alkaline composition to the hair, 5
Let stand for about 30 minutes, preferably about 10 to 25 minutes (step (E)). Thereafter, the hair is rinsed or shampooed and dried (step (F)).

[0022]

According to the present invention, hair can be permanently dyed without damaging the hair even if it is repeatedly applied.

[0023]

EXAMPLE 1 Dark brown Caucasian hair tresses were moistened and a composition (pH 3) containing 0.1% by weight of a reactive dye (Table 1) was uniformly applied to each tress. After standing at room temperature for 30 minutes, the hair tress was shampooed and then the following paste-like alkaline composition was applied. After leaving the hair tress at room temperature, it was shampooed and then the dyeing strength was measured by a commonly used method. The results are shown in Table 1. Table 1
In the middle, the a value indicates a red color tone and the b value indicates a blue color tone.

(1) Acidic reactive dye composition: hydroxyethyl cellulose 2.0 (% by weight) propylene carbonate 25.0 ethanol 5.0 PEG-40 hardened castor oil 3.0 lactic acid 5.0 32% sodium hydroxide 0 0.3 Reactive dye (Table 1) 0.1 Water remaining

(2) Alkaline composition: silica 4.8 (% by weight) hydroxyethyl cellulose 1.7 cellulose gum 3.0 EDTA.4 sodium 0.2 sodium stearate 1.5 sodium carbonate 1.0 corn starch 1.0 Ammonium persulfate 18.0 Potassium persulfate 40.0 Sodium metasilicate 11.0 Magnesium hydroxide 1.0 Magnesium peroxide 3.0 Magnesium carbonate 1.0 Sodium lauryl sulfate 0.8 Urea 1.0 Fragrance 0.5 Ammonium chloride 1.5 Paraffin oil 9.0 The powder having the above composition was mixed and mixed with a 6% aqueous hydrogen peroxide solution at a weight ratio of 25:35 to obtain a paste composition having a pH of 9.5.

[0026]

[Table 1]

From the results shown in Table 1, it was confirmed that the treatment with the alkaline composition improved the dyeing strength. These stains were also very stable to light and shampooing.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hartmut Mailing 64342 Seeheim-Jugenheim, Carolinen Strasse 17 F-term (reference) 4C083 AB032 AB102 AB172 AB312 AB372 AB411 AB412 AC012 AC102 AC242 AC302 AC432 AC532 AC682 AC782 AC792 AC842 AD242 AD262 AD282 BB21 BB43 CC36 DD22 EE01 EE26 4H057 AA02 BA07 CA07 CA11 CB18 CB45 CB46 CB47 CB50 CC02 GA21 GA25 HA05 HA06 HA13

Claims (3)

[Claims] 1. The following steps (A) to (F): (A) a composition containing a reactive dye and having a pH of 2 to 5 is applied to human hair, and (B) standing for about 5 to 45 minutes, (C) rinsing and drying, if necessary, (D) applying an alkaline composition containing peroxide, (E) allowing to stand for about 5 to 30 minutes,
(F) A method for dyeing human hair, wherein the dyed hair is rinsed or shampooed and dried. 2. The dyeing method according to claim 1, wherein the composition applied in the step (A) contains a reactive dye having at least one vinylsulfonyl group. 3. The dyeing method according to claim 1, wherein the composition applied in the step (A) contains a reactive dye having at least one sulfatoethylsulfonyl group.