JP2002370948A - First agent for oxidation type hair dye - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the first agent for oxidation type hair dye that has high dyeing power to hair with reduced hair damage accompanied by the dyeing treatment. SOLUTION: The first agent for oxidation type hair dye includes oxidation dye and cystine or a derivative thereof. As the cystine derivative, N,N'- diacetylcystine is preferably cited and the content of the oxidation dye is preferably 0.01-5 wt.% in the first agent and the content of the cystine or a derivative thereof is preferably 0.1-20 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a first agent for an oxidative hair dye, and more particularly, to a first agent having a high dyeing power on hair.
The present invention also relates to a first agent for an oxidized hair dye that causes less damage (damage) to the hair due to the hair dyeing treatment.

[0002]

2. Description of the Related Art As a hair dye, an oxidative hair dye comprising a first agent containing an oxidation dye (an oxidation dye intermediate) and a second agent containing hydrogen peroxide as an oxidant is widely used. ing. In the hair dyeing treatment using the oxidative hair dye, first, the first agent and the second agent are mixed, the mixture is applied to hair, a low-molecular-weight oxidation dye is penetrated into hair, and hydrogen peroxide is used. The hair dyes the hair by causing oxidative polymerization of the oxidation dye in the hair by oxygen generated by the decomposition of the dye to generate a pigment.

[0003] The above-mentioned decomposition of hydrogen peroxide occurs in the presence of alkali and cystine in the hair. However, in modern human hair which repeats color (hair dyeing treatment) and permanent (permanent wave treatment), Since the amount of cystine in the hair is reduced, the decomposition of hydrogen peroxide is unlikely to occur during hair dyeing treatment, especially when the hair is damaged and the amount of cystine is reduced, the decomposition of hydrogen peroxide As a result, there is a problem that the polymerization of the oxidation dye is not completed, and it is difficult to obtain a desired color. For example, there is a problem that if the generation of oxygen from hydrogen peroxide is small even when trying to dye reddish brown, the polymerization of the oxidation dye is not completed, so that the hair can be dyed only with the blue brown before the reddish brown. .

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the problems of hair dyeing treatment with the oxidative hair dye as described above, can give a desired color, and dyes hair. An object of the present invention is to provide a first agent for an oxidized hair dye that has high adhesiveness and less damage to hair due to hair dyeing treatment.

[0005]

The present invention has solved the above-mentioned problems by preparing a first agent for an oxidative hair dye by adding cystine or a derivative thereof in addition to an oxidative dye.

That is, cystine or a derivative thereof contained in the first agent for an oxidative hair dye promotes the decomposition of hydrogen peroxide to increase the amount of oxygen generated. Even in the case of dyeing the hair with a reduced amount, the polymerization of the oxidation dye is promoted, the desired tint can be obtained, and the dyeing power to the hair can be enhanced. Further, consumption of cystine from the hair during the hair dyeing treatment is suppressed, so that damage to the hair due to the hair dyeing treatment is reduced.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The first agent for an oxidative hair dye of the present invention is prepared by adding at least an oxidative dye and cystine or a derivative thereof to water or an aqueous liquid mainly containing water. , Of those components, first,
The cystine or a derivative thereof will be described in detail.

In the present invention, cystine is L-
Any of cystine, DL-cystine, and D-cystine can be used. In addition, as cystine derivatives,
For example, N, N'-diacetylcystine, N, N'-diformyl-DL-cystine, N, N'-dibenzoyl-
DL-cystine, N, N'-dibenzoyl-L-cystine, L-cystine disulfoxide and the like can be used.

[0009] These cystine or derivatives thereof can be used alone or in combination of two or more in the first agent for oxidative hair dyes, but the content is 0.1 to 20% by weight. %, Particularly preferably 1 to 10% by weight. That is, when the content of cystine or a derivative thereof is less than 0.1% by weight, the decomposition of hydrogen peroxide cannot be sufficiently promoted, so that the polymerization of the oxidation dye cannot be completed, There is a possibility that the desired color cannot be obtained, the dyeing power to the hair cannot be sufficiently improved, and the damage to the hair due to the hair dyeing process cannot be reduced.
When the content of cystine or a derivative thereof is more than 20% by weight, the effect is hardly increased, and waste of expensive cystine or a derivative thereof occurs.

In the present invention, the oxidation dye (oxidation dye intermediate) is not particularly limited.
Phenylenediamines such as paraphenylenediamine, N-phenyl-paraphenylenediamine, toluene-
Toluene diamines such as 2,5-diamine and toluene-3,4-diamine; aminophenols such as paraaminophenol and paramethylaminophenol; aminonitrophenols such as orthoamino-metanitrophenol; 4,4-diamino sulfate One or two of diphenylamines such as diphenylamine, diaminopyridines such as 2,6-diaminopyridine, and salts thereof;
More than one species can be used. The content of the oxidation dye in the first agent for an oxidative hair dye is not particularly limited, but is preferably 0.01 to 5% by weight, particularly preferably 0.5 to 3% by weight. If the content of the oxidation dye is less than the above,
There is a risk that the hair may not be dyed sufficiently, and if the content of the oxidation dye is higher than the above, excessive oxidation dye adheres to the hair surface in a large amount, and discoloration increases in daily life. , Clothes and the like.

Further, the first agent for oxidative hair dye of the present invention may contain a coupler, if necessary. As the coupler, for example, metaphenylenediamine, toluene-2,4-diamine, metaaminophenol, resorcin, pyrogallol, catechol and the like are used.

The first agent for an oxidized hair dye of the present invention usually contains an alkali agent for adjusting the pH to about 7 to 11, but the alkali agent is not particularly limited. Although not required, for example, aqueous ammonia, monoethanolamine, triethanolamine, potassium hydroxide, sodium hydroxide and the like are used. This alkaline agent adjusts the pH of the first agent for oxidative hair dyes to 7-1.
It is sufficient if there is an amount that can be adjusted to about 1,
The content in the first agent for oxidative hair dye is not particularly limited, but is preferably 0.1 to 20% by weight, particularly preferably 0.5 to 15% by weight. When the content of the alkaline agent is lower than the above, oxygen cannot be sufficiently generated from hydrogen peroxide, and hair may not be sufficiently dyed. If the amount is more, irritation to the skin may be increased.

The first agent for an oxidative hair dye of the present invention is prepared by dissolving or dispersing the above components in water or an aqueous liquid containing water as a main component. If necessary, nonionic surfactants, anionic surfactants, cationic surfactants, various surfactants such as amphoteric surfactants, humectants such as glycerin and propylene glycol, higher alcohols such as cetanol,
Oily components such as lanolin, squalane and liquid paraffin, stabilizers such as sulfites and ascorbic acid, and thickeners such as carboxymethylcellulose and hydroxyethylcellulose can be appropriately contained. The first agent is usually adjusted to pH 7 to 11 as described above.

The second agent used in combination with the first agent for an oxidative hair dye of the present invention contains hydrogen peroxide as an oxidizing agent. The content of the hydrogen peroxide in the second agent is not particularly limited, but is preferably 0.1 to 15% by weight, particularly preferably 1 to 6% by weight. When the content of hydrogen peroxide is less than the above range, hair may not be able to be dyed sufficiently, and when the content of hydrogen peroxide is more than the above range, irritation to the skin may be increased. There is.

The second agent is also prepared by dissolving or dispersing the above components in water or an aqueous liquid containing water as a main component. In this case, in addition to the above components, phenacetin,
Sodium stannate, stabilizers such as EDTA, fats and oils such as paraffin, higher alcohols, surfactants,
An acid, a pH adjuster, a fragrance, and the like can be appropriately contained as needed. And this second agent usually has a pH of 2-4.
It is adjusted to.

As the dosage form of the first part of the oxidized hair dye of the present invention, for example, various types such as liquid, cream, gel, paste, aerosol foam and the like can be adopted. The second agent used in combination with the first agent can also take various dosage forms as described above. Usually, the first agent and the second agent are prepared in the same dosage form. Is preferred.

In using the first agent of the oxidized hair dye of the present invention, the first agent and the second agent are mixed immediately before the hair dyeing treatment, and the mixture is applied to hair, and hydrogen peroxide is used. To cause the oxidation dye or the oxidation dye and the coupler to develop color, leave the state for a while, rinse, and then dry.

[0018]

Next, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to only these examples.

Example 1 and Comparative Example 1 The first composition for oxidative hair dye of Example 1 and Comparative Example 1 was prepared with the composition shown in Table 1. P of the first agent for the oxidized hair dye
H is about 10. The unit indicating the blending amount of each component in the table is part by weight, and the same applies to the following tables showing the composition.

[0020]

[Table 1]

The first agent for oxidized hair dye of Example 1 prepared as described above and the first agent for oxidized hair dye of Comparative Example 1
The agents were subjected to comparative tests of dyeing power and feel as shown below. First, a description will be given of a comparative test of the dyeing power on hair. In the hair dyeing treatment, the second agent used in combination with the first agent is the first agent of Example 1 and the first agent of Comparative Example 1. They have the composition shown in the following Table 2 and have a pH of about 3.

[0022]

[Table 2]

Dyeing power: 5 g each of the first agent for oxidized hair dye of Example 1 and the first agent for oxidized hair dye of Comparative Example 1
Then, 5 g of the above-mentioned second agent was placed in each of the cups, mixed with a brush, and the mixture was separately applied to 100 g of a 100% gray hair bundle weighing 1 g.
After leaving the hair at 30 ° C. for 30 minutes to dye the hair, the hair was washed with water, washed twice with a commercially available shampoo, further coated with a commercially available hair treatment, rinsed and dried.

The L value (brightness value) of the hair bundle after the hair dyeing treatment was measured by a color difference meter (color difference meter CR-200 manufactured by Minolta Co.). Table 3 shows the results. In this color difference measurement, the smaller the L value, the deeper the dye.

[0025]

[Table 3]

As shown in Table 3, Example 1 was compared with Comparative Example 1.
L value is smaller than that of N,
Using the first agent for oxidized hair dye of Example 1 containing N'-diacetylcystine, the first agent for oxidized hair dye of Comparative Example 1 not containing cystine or its derivative It was clear that the dyeing power was superior to that in the case of using.

Next, the evaluation of the feeling is evaluated by the hair dyeing treatment of the hair bundle and the hair of the monitor.

Feeling evaluation on hair bundles: First, the following (1)-
A hair dyeing treatment was performed on the hair bundle by the process shown in (6). (1) First Agent for Oxidative Hair Colorant of Example 1 and Comparative Example 1
15 g of each of the first agents for oxidative hair dyes, and 15 g of each of the second agents with respect to each of the first agents are mixed in a cup, mixed with a brush, and the mixture is weighed 20 g. Each separately. (2) Leave at 30 ° C. for 30 minutes. (3) Then, wash with water. (4) Rinse after washing twice with a commercially available shampoo. (5) Apply a commercially available treatment and rinse. (6) Dry with a dryer.

The evaluation of the touch was performed by touching the hair bundle after the step (6) of the hair dyeing process with hands by five panelists, and the touch was evaluated. As a result, the hair bundles treated by all five panelists using the first agent for oxidative hair dye of Example 1 were better treated with the first agent for oxidative hair dye of Comparative Example 1. The hair bundle was evaluated as “having better finger passing properties” than the hair bundle that had been subjected to the hair dyeing treatment.

Evaluation of feel on monitor hair: First, hair was subjected to hair dyeing according to the following steps (1) to (6). (1) The hair of the monitor is divided into halves at the center, and one of them is 30 g of the first agent for the oxidative hair dye of Example 1 and the second agent 3
And a mixture of 30 g of the first agent for oxidative hair dye of Comparative Example 1 and 30 g of the second agent. (2) Leave at room temperature for 30 minutes. (3) Rinse with hot water (4) Rinse after washing twice with a commercial shampoo. (5) Apply a commercially available treatment and rinse. (6) Dry with a dryer.

The evaluation of the touch was made by touching the hair of the monitor after the step (6) of the hair dyeing process with hands by five panelists, and the touch was evaluated. As a result, all of the five panelists used the first agent for oxidative hair dye of Comparative Example 1 for the hair whose hair was treated using the first agent for oxidative hair dye of Example 1. The hair was evaluated as having better finger-throughability than the hair dyed.

As described above, the oxidized form of Example 1 containing the cystine derivative N, N'-diacetylcystine was evaluated in the evaluation of the feeling of the hair bundle and the evaluation of the feeling of the monitor hair. The case where the hair dyeing treatment was performed using the first agent for the hair dye was better than the case where the hair treatment was performed using the first agent for the oxidized hair dye of Comparative Example 1 not containing cystine or a derivative thereof. , "Good finger passing" means
When the hair dyeing treatment is performed using the first agent for an oxidative hair dye of the present invention, it can be determined that this indicates that the hair is less damaged.

[0033]

As described above, according to the present invention, it is possible to provide the first agent for an oxidized hair dye which has a high dyeing power on hair and has little damage to the hair due to the hair dyeing treatment. .

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiyuki Makino 2-17-2 Akakawa, Asahi-ku, Osaka-shi Inside Milbon Co., Ltd. (72) Inventor Takuya Kawamura 2-17-2, Akakawa, Asahi-ku, Osaka Milbon Co., Ltd. (72) Inventor Junko Shinmoto 2-17-2 Akakawa, Asahi-ku, Osaka-shi Milbon Co., Ltd. (72) Inventor Mitsuyoshi Kashihara 2-17-2 Akakawa, Asahi-ku, Osaka-shi Milbon Co., Ltd. (72) Invention Person Satoshi Ogawa 2-17-2 Akakawa, Asahi-ku, Osaka-shi Milbon Co., Ltd. (72) Inventor Kazuki Fujii 2-17-2 Akakawa, Asahi-ku, Osaka-shi Milbon Co., Ltd. (72) Katsumi Kanayama Asahi, Osaka-shi 2-17-2 Akakawa, Ward F-term in Milbon Co., Ltd. (Reference) 4C083 AB082 AB412 AC022 AC072 AC182 AC551 AC552 AC642 AC661 AC662 AC731 AC732 AC851 AC852 AC892 BB01 BB41 BB42 BB44 BB45 CC36 DD08 DD22 DD23

Claims (3)

[Claims] 1. A first agent for an oxidative hair dye comprising an oxidation dye and cystine or a derivative thereof. 2. The oxidative hair dye according to claim 1, wherein the cystine derivative is N, N'-diacetylcystine.
Agent. 3. The content of the oxidation dye is 0.01 to 5% by weight.
And the content of cystine or a derivative thereof is 0.1 to 20.
The first agent for an oxidative hair dye according to claim 1, wherein the amount is 1% by weight.