JP6323899B2 - Keratin fiber dyeing method and keratin fiber dyeing agent - Google Patents

Description

  The present invention relates to a keratin fiber dyeing method and a keratin fiber dyeing agent, and more particularly to a keratin fiber dyeing method and a keratin fiber dyeing agent that are less likely to lose color and have little change in color tone even when the color is lost.

  Conventionally, hair dyes using acidic dyes such as red 227, orange 205, yellow 406, purple 401, black 401, etc. as one of keratin fiber dyes such as hair dyes, hair manicures, etc. (For example, Patent Document 1). Such a hair dye exhibits extremely vivid dyeing properties at the beginning of dyeing and can be dyed in almost the desired color, but has a drawback of being discolored by several times of hair washing because of poor fastness. For this reason, it was necessary to re-dye frequently in order to keep the color strength constant.

In addition, this type of hair dye is designed to produce a desired color by combining a plurality of dyes. However, since the fastness is different for each acid dye used, a dye with particularly low fastness falls off first. Only dyes with a slightly higher fastness level remain in the hair, and this may cause a phenomenon in which the color of the hair changes to a completely different color tone from the original dyeing.
In order to solve such problems, it is usually designed so that each acid dye can be removed as uniformly as possible by combining the dyes having the same degree of fastness to produce a color. Since the kind of the dye is limited, it is difficult to obtain a desired color tone.

JP-A-9-227346

As a result of intensive studies to solve the above problems, the present inventors have found that the fastness of the acid dye is low because both the hair and the acid dye are negatively charged in the pH condition at the time of washing. I got the idea. That is, when both hair and acid dye are negatively charged, an electrostatic repulsion force acts between the hair and the acid dye, so that the acid dye is driven out of the hair fiber by the electrostatic repulsion force. This is thought to be the cause of discoloration. Even if the pH conditions are the same, acidic dyes that are negatively charged are preferentially expelled because of their large electrostatic repulsion, and weakly charged acidic dyes have relatively low electrostatic repulsion, so they are relatively effective for hair. It is easy to remain, and this is the reason why the fastness is different for each acid dye, and it is considered that the color tone of the hair is changed by washing the hair. Therefore, if the electrostatic repulsion between the hair and the acid dye is canceled, the color fading can be prevented to some extent, and even when the color fades, all the acid dyes fall out almost uniformly, so the change in color tone is reduced, The inventors have obtained knowledge that the above problems can be solved, and have completed the present invention.
That is, the present invention solves the above-mentioned problems of the prior art and uses a substance that is positively charged under the pH conditions at the time of washing after dyeing as an electrostatic repulsion preventive agent. An object of the present invention is to provide a method for dyeing keratin fibers and a dyeing agent for keratin fibers, which cancels out the electric repulsive force, is less likely to lose color, and has little change in color tone even when the color is lost.

That is, a feature of the present invention is a method of dyeing keratin fibers with an acid dye,
Selected from the group consisting of ε-polylysine, polyquaternium-2, polyquaternium-72, poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] having a property of being positively charged in the pH condition at the time of washing after dyeing that processes the Riquet keratin fibers by which the electrostatic repulsion inhibitor at least one is a process for dyeing keratin fibers for processing keratinous fibers by electrostatic repulsion inhibitor prior to staining with acid dyes.

  Another feature of the present invention is the above keratin fiber dyeing method in which the treatment with the electrostatic repulsion inhibitor is carried out before dyeing with the acid dye.

Yet another feature of the present invention, electrostatic repulsion inhibitor ε- polylysine, Polyquaternium - 7 2, poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] least one member selected from the group consisting in This is a method for dyeing certain keratin fibers.

Still another feature of the present invention is a multi-drug type in which an acid dye and an electrostatic repulsion preventive agent are separately included, and the electrostatic repulsion preventive agent has a property of being positively charged in pH conditions during washing after dyeing. A keratin fiber dyeing agent that is at least one selected from the group consisting of ε-polylysine, polyquaternium-2, polyquaternium-72, and poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] .

  According to the present invention, since the keratin fiber is treated with the electrostatic repulsion preventive agent, the electrostatic repulsion force between the acid dye and the keratin fiber is canceled or reduced, or conversely, the attractive force works. Accordingly, the acid dye is less likely to fall off from the keratin fiber during washing, so that the fastness is improved, and in the case of color loss, all the acid dyes fall off almost evenly, thereby preventing a change in color tone.

In the present invention, the keratin fibers include fibers mainly composed of keratin such as hair and wool, and the hair includes wigs composed of hair in addition to hair. In the following description, hair (head hair) will be described as an example of keratin fibers.
The keratin fiber dyeing method of the present invention is a method of dyeing keratin fibers with an acid dye, and has the property of being positively charged under pH conditions during washing after dyeing, ε-polylysine, polyquaternium-2, polyquaternium- 72, by poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] by the electrostatic repulsion inhibitor is at least one selected from the group consisting of processing the Riquet keratin fibers, electrostatic repulsion inhibitor It is characterized in that the keratin fiber is treated before dyeing with an acid dye .
The staining agent for keratin fibers of the present invention contains an acidic dye and an electrostatic repulsion preventive agent, and the electrostatic repulsion preventive agent has a property of being charged positively under pH conditions during normal washing, ε-polylysine , Polyquaternium-2, polyquaternium-72, and poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene].

  The acid dye used in the present invention is not particularly limited, but Red No. 2, Red No. 3, Red No. 102, Red No. 104, Red No. 105, Red No. 106, Red No. 201, Red No. 202, Red No. 203, Red 204, Red 205, Red 206, Red 207, Red 208, Red 213, Red 214, Red 215, Red 218, Red 219, Red 220, Red 221 and Red 223 Red 225, Red 226, Red 227, Red 228, Red 230, Red 231, Red 232, Red 401, Red 502, Red 503, Red 504, Red 506, Orange 201, orange 203, orange 204, orange 205, orange 206, orange 207, yellow 4, yellow 5, yellow 201, yellow 202, yellow 203, Color 204, Yellow 205, Yellow 402, Yellow 403, Yellow 406, Yellow 407, Green 3, Green 201, Green 202, Green 204, Green 205, Green 401, Green 402 No. 1, Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 202, Blue No. 203, Blue No. 204, Blue No. 205, Brown No. 201, Purple No. 201, Purple No. 401, Black No. 401, Acid Blue 1, Examples include Acid Blue 3, Acid Blue 62, Acid Black 52, Acid Brown 13, Acid Green 50, Acid Orange 6, Acid Red 14, Acid Red 35, Acid Red 73, Acid Red 184, Brilliant Black 1, and the like. Red 227, orange 205, yellow 406, purple 401, black 401 are preferred There.

  The pH condition for washing keratin fibers depends on the type of keratin fibers, but when keratin fibers are human hair, it is usually around 5-6 when using normal shampoo, and around 7 when not using it. Is about 5-7. The isoelectric point of keratin fibers is about 3.0 to 5.5 and is usually around 3.7. Therefore, keratin fibers (hair) are negatively charged when washed under the above normal pH conditions. Also, the acidic dye is negatively charged under the above washing conditions. That is, when washing is performed under normal pH conditions, both the keratin fibers and the acid dye are negatively charged, and an electrostatic repulsive force acts between the two, so this electrostatic repulsive force is the fastness of the acid dye. It is considered to have an adverse effect on

The present invention is characterized by eliminating this electrostatic repulsion force by treating with an electrostatic repulsion inhibitor. In the present invention, the electrostatic repulsion inhibitor means a substance having a property of being positively charged at the pH at the time of washing after dyeing. Specifically, oligopeptides obtained by polymerizing basic amino acids, cationic polymers that have been blended in shampoos and hair conditioner products, or other cationic polymers can be used as an electrostatic repulsion inhibitor in the present invention. .
Examples of oligopeptides preferable as the electrostatic repulsion preventing agent in the present invention include ε-polylysine.
Moreover, as a preferable cationic polymer as an electrostatic repulsion inhibitor in the present invention, polyquaternium-2, polyquaternium-4, polyquaternium-6, polyquaternium-7, polyquaternium-10, polyquaternium-11, polyquaternium-22, polyquaternium-39, Examples include polyquaternium-51, polyquaternium-55, polyquaternium-64, and polyquaternium-72.
In addition, another cationic polymer preferable as an electrostatic repulsion inhibitor in the present invention is poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] (hereinafter referred to as this cationic polymer) developed as an enzyme stabilizer. Can be abbreviated as PA1). The chemical formula of PA1 is shown below. These may be used alone or in combination of two or more as required.
Among these electrostatic repulsion inhibitors, ε-polylysine, polyquaternium-2, polyquaternium-72, and poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] are more preferable.

In the present invention, among the electrostatic repulsion preventing agents as described above, those that are easily adsorbed by the keratin fibers and that can positively charge the surface of the keratin fibers when adsorbed are preferable. Such an electrostatic repulsion inhibitor can be evaluated by a simple test using a basic dye.
That is, if the surface of the keratin fiber is positively charged by the electrostatic repulsion preventive agent, it becomes difficult to be dyed due to electrostatic repulsion with the positively charged basic dye. In other words, the electrostatic repulsion preventive agent that makes it difficult for the treated keratin fibers to be dyed by the basic dye charges the surface of the keratin fibers positively. If this property is utilized, a preferable electrostatic repulsion inhibitor can be selected.

Hereinafter, the method for evaluating an electrostatic repulsion inhibitor will be described taking human hair as an example.
First, a hair bundle of human white hair (100%) is immersed in a 0.5% by weight solution of an electrostatic repulsion inhibitor to be evaluated for 5 minutes, then rinsed with running water at 40 ° C. for 30 seconds, air-dried and treated hair bundle. Get.
The treated hair bundle is dipped in a 0.5% by weight solution of basic blue 99 for 10 minutes, then washed with running water at 40 ° C. for 30 seconds and air-dried to obtain a dyed hair bundle. About the obtained dyed hair bundle, the color difference A with the untreated human white hair bundle in the Lab color system is measured.
The untreated white hair bundle is dyed in the same manner as described above, and the color difference B between the stained hair bundle and the untreated white hair bundle is measured.
When the color difference A and the color difference B measured as described above are compared, a color difference A lower than the color difference B can be suitably used as the electrostatic repulsion preventing agent in the present invention. The difference between the color difference A and the color difference B (color difference B−color difference A) is preferably a positive value.

In the keratin fiber dyeing method and the keratin fiber dyeing agent of the present invention, dyes and pigments other than acid dyes can be used as needed within a range not impairing the effects of the present invention. Examples of these pigments and dyes include tar pigments, HC dyes, basic dyes, direct dyes, etc., and these may be used alone or in combination of two or more as required. By containing these pigments and dyes, hair can be dyed in various colors.
Examples of such a tar dye include those specified by the Ministry of Health and Welfare Ordinance No. 30 “Ministerial Ordinance for Determining Tar Dyes that can be Used for Pharmaceuticals” promulgated on August 31, 1966. Examples of the HC dye include HC blue 2, HC orange 1, HC red 1, HC red 3, HC yellow 2, HC yellow 4, and the like. As the basic dye, basic blue 99, basic brown 16 , Basic brown 17, basic red 51, basic red 76, basic yellow 57, etc., and direct dyes include 2-amino-6-chloro-4-nitrophenol, 3-methylamino-4- Nitrophenoxyethanol, 2-amino-3-nitrophenol, 4-hydroxypropylamino-3-nitrophenol and the like can be mentioned. These may be used alone or in combination of two or more as required.

In the keratin fiber dyeing method and keratin fiber dyeing agent of the present invention, various components usually used in cosmetics and keratin fiber dyeing agents can be used as long as the effects of the present invention are not impaired.
For example, surfactants include cationic surfactants such as lauryltrimethylammonium chloride and stearyltrimethylammonium chloride; polyoxyethylene cetyl ether, polyoxyethylene oleyl ether, polyoxyethylene behenyl ether, polyoxyethylene castor oil, polyoxyethylene castor oil, Nonionic surfactants such as oxyethylene hydrogenated castor oil and sorbitan stearate; oil agents such as cetyl alcohol, cetostearyl alcohol, stearyl alcohol, petrolatum, paraffin, liquid paraffin, cetyl palmitate, octyl palmitate; xanthan gum, succinoglucan , Guar gums such as hydroxypropyl guar gum, cationized guar gum, carboxymethyl cellulose, hydroxyethyl cellulose, cationized cell Thickeners such as celluloses such as cellulose; humectants such as 1,3-BG, PG, DPG, glycerin; chelating agents such as EDTA, EDTA-2Na, EDTA-4Na, hydroxyethanediphosphonic acid: parabens, A preservative such as methyl isothiazolinone; a solvent such as ethanol and isopropyl alcohol; a fragrance and the like, which can be arbitrarily combined as needed.

The staining agent for keratin fibers of the present invention may be a single agent type or a multi-agent type, but is a multi-agent type in which an electrostatic repulsion inhibitor and an acid dye are separately contained, for example, a first agent containing an electrostatic repulsion inhibitor. It is preferable to use a two-component system consisting of one agent and a second agent containing an acid dye because it can be dyed more vividly.
The dosage form can also be any form such as liquid, emulsion, cream, gel, foam, aerosol, etc. The container can also be in a bag, bottle, pump container, tube, spray can Anything can be adopted.

The method of treating the keratin fibers with the antistatic repulsion agent is not particularly limited as long as part or all of the charge on the surface of the keratin fibers is neutralized. For example, the keratin fibers are immersed in a solution of the antistatic repulsion agent. Then, pull it up, wash it with water, and dry it as necessary.Apply the anti-resilience agent solution to the keratin fiber and let it get used. Wipe off the excess solution with a towel and dry it as necessary. The method of making it can illustrate. Thereby, the electrostatic repulsion preventing agent is electrostatically adsorbed to the keratin fibers, and the surface of the keratin fibers is coated with the electrostatic repulsion preventing agent to form a composite.
In addition, the appropriate processing method to the keratin fiber by each electrostatic repulsion inhibitor differs depending on the relationship between the affinity of the electrostatic repulsion inhibitor to water and the adhesion to the keratin fiber. Judgment as to whether or not a specific treatment method performed with the electrostatic repulsion inhibitor is suitable can be evaluated by the evaluation method using the basic dye described above.

The amount of the electrostatic repulsion inhibitor is not particularly limited. However, if the keratin fiber is positively charged by the treatment, not only the electrostatic repulsion force is eliminated, but also the negatively charged acidic dye. Since electrostatic attraction acts between them, acidic dyes are less likely to fall off from keratin fibers, and the fastness of the dyes is further improved, preventing discoloration and color tone changes. Therefore, the processing amount of the electrostatic repulsion preventing agent may be appropriately determined according to the desired effect.
The treatment of the keratin fiber with the electrostatic repulsion inhibitor may be performed before dyeing with an acid dye, simultaneously with dyeing, or after dyeing, but it is preferable to carry out the dyeing before dyeing because the fastness of the dye is most improved.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, it cannot be overemphasized that this invention is not restrict | limited at all by these. In the following description, “%” means “% by weight”.

Examples 1-4, Comparative Example 1
(1) Treatment with an electrostatic repulsion inhibitor:
First, a hair bundle (a) of human white hair (100%) (model number: BM-WA, sold by Beaulux) is placed in a 0.5% solution of an electrostatic repulsion inhibitor for 5 minutes at room temperature (23 (5 ° C.), washed with running water at 40 ° C. for 30 seconds, and air-dried to obtain a treated hair bundle (b). Table 1 shows the type of the electrostatic repulsion inhibitor to be evaluated and the pH of the solution.

On the other hand, a 0.1 mol / L citric acid solution and 0.2 mol / L disodium hydrogen phosphate were mixed at a ratio of 6.5: 43.6 to prepare a pH 6.81 buffer solution. A staining solution was prepared by mixing 5% basic blue 99.
The treated hair bundle (b) treated with the electrostatic repulsion inhibitor in 10 ml of this dyeing solution was immersed for 10 minutes at room temperature (23.5 ° C.) (bath ratio 1:10), and then washed with 40 ° C. running water. The hair was washed for 30 seconds and air-dried to obtain a dyed hair bundle (c1). About the obtained dyed hair bundle (c1) and human hair gray hair bundle (a), the obtained dyed hair bundle (c1) and human white hair in the Lab color system using the spectrocolorimeter CM-2600d manufactured by Konica Minolta The color difference A from the hair bundle (a) was measured.
The human white hair bundle (a) not treated with the electrostatic repulsion inhibitor is also dyed in the same manner as above to obtain a dyed hair bundle (c2). The dyed hair bundle (c2) in the Lab color system and human The color difference B with the gray hair bundle (a) was measured.
Table 1 shows the color difference A, the color difference B, and the difference between the color difference A and the color difference B (color difference B−color difference A) measured for each electrostatic repulsion inhibitor.

(2) Dyeing with acid dyes:
First, in the same manner as the method described in the evaluation section of the antistatic repulsion agent, the human white hair bundle (a) was treated with the antistatic repulsion agent and purified water shown in Table 1, and each treatment was completed. A hair bundle (b) was obtained.
About each obtained hair bundle (b) obtained, the hair dye (hair nail polish) which shows a composition in Table 2 is apply | coated by the bath ratio 1: 1, and it extends uniformly to a hair bundle with a brush, and it is room temperature (23. (5 ° C) for 20 minutes to obtain a dyed hair bundle (c).

The obtained dyed hair bundle (c) was washed with running water at 40 ° C. for 30 seconds and further washed with a 1% SDS solution for 30 seconds. Thereafter, the washing solution was washed again with running water, and excess moisture was removed with a towel and then dried to obtain a washed hair bundle (d). The pH at the time of washing was 5-7.
About the obtained washing | cleaning hair bundle (d), the color difference with the said dyed hair bundle (c) was measured with the spectrocolorimeter CM-2600d made from Konica Minolta, and the obtained numerical value was made into the degree of color fading by washing | cleaning. . The results are shown in Table 3.
Further, the difference in the degree of color fading between the case where no electrostatic repulsion inhibitor is used (Comparative Example 1) and the case where Examples (1 to 4) are used is that of the acid dye increased by the electrostatic repulsion inhibitor as it is. The degree of robustness. Table 3 also shows the degree of fastness and the difference between color difference A and color difference B (color difference B−color difference A) measured in the evaluation of the antistatic agent.

  As shown in Table 3, it is understood that discoloration due to washing is suppressed and dye fastness is increased by treating the hair bundle with an electrostatic repulsion inhibitor in advance.

  The method for dyeing keratin fibers and the dyeing agent for keratin fibers according to the present invention is such that the acid dye is not electrostatically repelled or reduced by the electrostatic repulsion inhibitor, preferably the acid dye and keratin. Since electrostatic attraction acts between the fibers, the fastness of the dye is excellent, the color fading is difficult, and even when the color is fading, there is almost no change in color tone.

Claims (3)

A method of dyeing keratin fibers with an acid dye,
From ε-polylysine, polyquaternium-2, polyquaternium-72, poly [oxyethylene (dimethylimino) propyl (dimethylimino) propyl (dimethylimino) ethylene] having the property of being positively charged under the pH conditions at the time of washing after dyeing comprising processing the Riquet keratin fibers by the electrostatic repulsion inhibitor is at least one selected from the group, and performs the processing of keratin fibers by electrostatic repulsion inhibitor prior to staining with acid dyes Method for dyeing keratin fibers . Electrostatic repulsion inhibitor ε- polylysine, polyquaternium -72, poly claim 1, characterized in that at least one member selected from the group consisting of oxyethylene (dimethylimino) propyl (dimethylimino) ethylene] The dyeing | staining method of keratin fiber of description.   Ε-polylysine, polyquaternium-, which is a multi-agent type that separately contains an acid dye and an electrostatic repulsion agent, and has a property of being positively charged in pH conditions during washing after dyeing 2. A dye for keratin fibers, which is at least one selected from the group consisting of polyquaternium-72 and poly [oxyethylene (dimethylimino) propyl (dimethylimino) ethylene].