JP2003221318A - Process for dyeing human hair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable permanent dyeing of hair without damaging the hair, even upon repetitive application. <P>SOLUTION: A process for dyeing human hair comprises steps (A)-(F) wherein(A) a composition containing a reactive dye with a pH of 2-5 is applied to human hair and (B) left for about 5-45 min, (C) the hair is rinsed and dried if required, (D) a composition containing an oxidation dye precursor and a peroxide and having a pH of 7.5-12 is applied and (E) left for 1-20 min, and (F) the dyed hair is rinsed or shampooed and dried. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

The present invention has good dyeing properties such as stability against light, shampoo treatment and environmental influences, gives long lasting dyeing, and does not damage the hair even after repeated application, 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 method is dyeing with a direct dye, which does not damage the hair even if it is repeatedly applied.
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 frequent shampoo treatments, environmental influences and the like.

Another method is dyeing with an oxidative dye consisting of an oxidative dye precursor and an oxidizing agent. Since these substances react directly with the hair, permanent dyeing of the hair is possible, but repeated dyeing in this way in a short time may damage the hair.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method by which permanent dyeing can be carried out without damaging human hair.

[0005]

When the human hair is dyed by a method including steps (A) to (F) described below, the present inventors are stable against environmental influences and shampoo treatment and damage the hair. It was found that a permanent dyeing similar to oxidative dyes can be obtained without any of the above.

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, (B) left for about 5 to 45 minutes. To do
(C) Rinsing and drying, if necessary, (D) applying a composition containing an oxidizing dye precursor and a peroxide and having a pH of 7.5 to 12, (E) leaving for 1 to 20 minutes, (F) The present invention provides a method for dyeing human hair, which comprises rinsing, shampooing, and drying the dyed hair.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The reactive dye used in the step (A) of the present invention is known as a dyeing component, has at least one active group in the molecule, and has a substrate (hair keratin in the case of the present invention). ) And reacts with the functional groups in Such reactive dyes are described, for example, in "Rompp Chemie Lexikon" No. 9
Ed., Pp. 3805-3806, and usually has a hydrophilic group. In the present invention, preferred reactive dyes are those having at least one vinylsulfonyl group or at least one sulfatoethylsulfonyl group which separates sulfuric acid to become a vinylsulfonyl group, and these have activity of hair keratin. It reacts with groups.

Particularly preferred reactive dyes are represented by the following formulas (1) to (1)
It is a compound represented by (25) or a salt thereof. Examples of the salt include sodium salt, potassium salt, ammonium salt and the like.

[0009]

[Chemical 1]

[0010]

[Chemical 2]

[0011]

[Chemical 3]

[0012]

[Chemical 4]

[0013]

[Chemical 5]

[0014]

[Chemical 6]

A reactive dye having a heterocyclic group (which may have a halogen atom) such as triazine, pyrazine and pyrimidine is also preferable. The dye group is preferably a diazo group, anthraquinone, phthalocyanine or dioxazine structure.

Since the reactive dye is applied to the hair, it is incorporated into a base usually used in hair dyes, preferably a solution, emulsion, gel or (foam) aerosol. The base includes components usually used in such compositions, such as surfactants, thickeners, fragrances, stabilizers, solubilizers, natural and / or synthetic polymers, complexing agents, and the like, for example, , K. Schrad
The components described in “Grundlagen und Rezepturen der Kosmetika”, 2nd edition (1989), pp. 796-798, etc. can be incorporated.

The amount of the reactive dye compounded in the composition applied to the hair varies depending on its structure and desired dyeing strength, but it is usually about 0.01 to 5% by weight, especially about 0. 05-2.5% by weight, more preferably about 0.1-1% by weight. Further, for fine adjustment of color tone, a dye can be directly mixed.

The pH of the composition is pH 2-5, preferably about 2.5-4. In this case, the organic carboxylic acid such as lactic acid, malic acid, citric acid, etc.
It is preferable to use a buffer system by using about wt%. Furthermore, 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 permeation-promoting effect on acid dyes. Examples of the hydrophilic organic solvent include benzyl alcohol, benzyloxyethanol, propylene carbonate, methylpyrrolidone and the like. By using an acidic base containing a hydrophilic organic solvent in this way, the reactive dye effectively permeates the hair.

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

Between steps (B) and (D), ie between the treatment 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. Steps can be included.

The oxidative dye composition used in step (D) usually contains at least one color-developing agent and at least one coupling agent. In the present invention, a color-developing agent, a coupling agent and a shading agent usually used in such a field, for example, "Grundla" by K. Schrader.
gen und Rezepturen der Kosmetika "2nd edition (1989)
The components described on pages 784-804 and the like can be blended.

Examples of the color-developing agent include 1,4-diaminobenzene, 2,5-diaminotoluene, tetraaminopyrimidine, triaminohydroxypyrimidine, 1,2,2.
4-triaminobenzene, 2- (2,5-diaminophenyl) ethanol, 2- (2'-hydroxyethylamino) -5-aminotoluene, 1-amino-4-bis (2'-hydroxyethyl) aminobenzene , Or water-soluble salts thereof.

As the coupling agent, for example, resorcinol, 2-methylresorcinol, 4-chlororesorcinol, 2-amino-4-chlorophenol, 4-
(N-methyl) aminophenol, 2-aminophenol, 3-aminophenol, 1-methyl-2-hydroxy-4-aminobenzene, 3-N, N-dimethylaminophenol, 4-amino-3-methylphenol, 5-
Amino-2-methylphenol, 6-amino-3-methylphenol, 3-amino-2-methylamino-6-methoxypyridine, 2-amino-3-hydroxypyridine, 4-aminodiphenylamine, 4,4'-diamino Diphenylamine, 2-dimethylamino-5-aminopyridine, 2,6-diaminopyridine, 1,3-diaminobenzene, 1-amino-3- (2'-hydroxyethylamino) benzene, α-naphthol, 1,4- Diamino-2-chlorobenzene, 4,6-dichlororesorcinol, 1,3-diaminotoluene, 1-hydroxynaphthalene, 4-hydroxy-1,2-methylenedioxybenzene, 1,5-dihydroxynaphthalene, 1,7-dihydroxy Naphthalene, 2,7-dihydroxynaphthalene, 4-hydroxy-1, 2-Methylenedioxybenzene, 2,4-diamino-3-chlorophenol, 1-methoxy-2-amino-4- (2′-hydroxyethylamino) benzene and the like can be mentioned.

The color-developing agent and the coupling agent are in a molar ratio of 1:
It is preferably contained in a ratio of 3 to 5: 1, particularly 1: 1 to 3: 1. The content in the oxidative dye composition varies depending on the desired dyeing, but is about 0.25 to 5% by weight. Is preferred. The oxidative dye composition can be used in the form of a solution, cream, paste, gel, aerosol or the like.

The peroxide is preferably a hydrogen peroxide solution, emulsion or gel. In addition, other commonly used peroxides such as alkaline earth peroxide, urea peroxide,
Melamine peroxide and the like can also be used within the respective stoichiometric ranges.

In step (D), the oxidative dye composition is applied to hair by mixing with a peroxide, for example a 6% by weight hydrogen peroxide solution, in a weight ratio of 1: 1 before application. To do. The alkaline mixture (i.e. containing the peroxide) immediately before use has a pH of 7.5 to 12, preferably pH 8 to 1.
1, particularly preferably pH 8.5-10, for example about pH 9.5.

The alkaline agent used here is ammonia, monoethanolamine or sodium carbonate,
Preference is given to alkali carbonates and hydrogen carbonates such as potassium carbonate, sodium hydrogen carbonate and potassium hydrogen carbonate. Other alkaline agents such as diethanolamine, triethanolamine and other hydroxyalkanolamines can also be used.

The alkaline composition may be a solution, an emulsion,
It can be in the form of a dispersion, gel, (foam) aerosol, etc., and further other ingredients such as conditioning agents,
Ingredients usually used in such compositions can also be added.

After applying the alkaline composition to the hair, 1 to
Let stand for 20 minutes, preferably for about 5-15 minutes (step (E)). Then, the dyed hair is rinsed or shampooed and dried (step (F)).

[0030]

According to the present invention, the hair can be permanently dyed without damaging the hair even after repeated application.

[0031]

EXAMPLE 1 A bleached human hair tress is moistened with a reactive dye of 0.1%.
The composition containing wt% was applied uniformly to each hair tress.
After leaving at room temperature for 15 minutes, rinse the hair tress, dry,
The alkaline composition of the oxidative dye-peroxide mixture shown below was then applied to the hair tress. The hair tresses were left at room temperature for 10 minutes, then rinsed and dried.

The dye strength and the stability of dyeing with respect to the light and shampoo treatments of the obtained hair tresses were compared with those of the hair tresses not treated according to the present invention, that is, the hair tresses not subjected to the alkaline post-treatment. , Visually evaluated.

[0033] (1) Acidic reactive dye base solution: Propylene carbonate 25.0 (wt%) Ethanol 5.0 PEG-40 hydrogenated castor oil 3.0 Lactic acid 5.0 32% sodium hydroxide pH 3.5 Reactive dye 0.1 Water level

(2) Alkali Oxidation Dye Composition: (Base) Cetylstearyl Alcohol 11.00 (wt%) Polyoxyethylene (5) Oleic Acid Ester 5.00 Oleic Acid 2.50 Stearic Acid Monoethanolamide 2. 50 Palm fatty acid monoethanolamide 2.50 Sodium lauryl sulfate 1.70 Sodium sulfite 1.00 1,2-Propanediol 1.00 Ascorbic acid 0.50 Ammonium chloride 0.50 EDTA.4 sodium salt 0.20 Perfume 0. 40 Wheat Protein Hydrolyzate 0.20 Silica 0.10 Ammonia (25%) 7.20 (Oxidizing Dye Mixture 1) 4-Aminophenol 0.40 2,5-Diaminotoluene Sulfate 0.80 1-Naphthol 0 .15 Resorcinol 0.03 3-Aminopheno Le 0.10 water remaining 100.00

[0035] (Oxidation dye mixture 2) 2,5-Diaminotoluene / sulfate 0.80 Resorcinol 0.30 2-amino-4-hydroxypyridine 0.06 3-aminophenol 0.03 (The base is the same as above, and the total amount is adjusted to 100.00 with water)

Prior to application, each alkaline oxidation dye composition comprises:
Mixed with 6% hydrogen peroxide in a weight ratio of 1: 1 (pH
9.5).

When the compound of the formula (3) was used as the reactive dye and the oxidation dye mixture 1 was used, a strong, glossy red dyeing was obtained, which was stable even after 10 times of shampoo treatment. On the other hand, when the step (D) was omitted, sufficient dyeing was not obtained, and after only two shampoo treatments, it fell off. Further, when the compound of the formula (2) was used as the reactive dye and the oxidation dye mixture 2 was used, excellent reddish brown dyeing was obtained, which was stable even after 10 times of shampoo treatment. On the other hand, when step (D) was omitted, only a light red dyeing was obtained.

Continued front page    F-term (reference) 4C083 AB032 AB172 AB332 AB352                       AC072 AC102 AC112 AC302                       AC332 AC352 AC432 AC472                       AC532 AC552 AC642 AC782                       AC791 AC792 AC852 AD412                       AD642 BB24 CC36 EE26                 4H057 AA02 BA07 BA09 CA07 CC02                       DA01 DA21

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, (B) left for about 5 to 45 minutes,
(C) Rinsing and drying, if necessary, (D) applying a composition containing an oxidizing dye precursor and a peroxide and having a pH of 7.5 to 12, (E) leaving for 1 to 20 minutes, (F) A method for dyeing human hair, which comprises rinsing, shampooing, and drying the dyed hair. 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 step (A) contains a reactive dye having at least one sulfatoethylsulfonyl group.