KR20230168956A - Composition for hair dye - Google Patents

Abstract

The present invention relates to a composition for hair that secures the stability of basic or direct dyes while simultaneously improving the adhesion of basic or direct dyes. Even though the hair composition of the present invention does not contain oxidized hair dyes that cause allergies and irritation, it can provide excellent hair dyeing power and color retention with only basic or direct hair dyes, and can exhibit excellent color development and color retention by additionally prescribing a cationic polymer. there is.

Description

Composition for hair dye}

The present invention relates to compositions for hair. More specifically, the present invention relates to a composition for hair dyeing that contains basic or direct dyes instead of irritating oxidized dyes and has further improved color development and color retention.

Commonly used hair dyes include p-phenylenediamine or its derivatives and aminophenol-based oxidation hair dyes. Hair dye using oxidation hair dye consists of a first agent consisting of an oxidation dye and a second agent containing an oxidizing agent for color development and decolorization of hair through the oxidation condensation reaction of the oxidation dye. Hydrogen peroxide is mainly used as the oxidizing agent. Hair dyes containing oxidized dyes have the advantage of maintaining color well after dyeing hair and realizing a variety of colors.

However, unlike general dyes, oxidation dyes used in oxidation hair dyes develop color through an oxidation condensation reaction between oxidation dyes and hydrogen peroxide, and are therefore known to be a cause of allergies and irritation. Hydrogen peroxide contained in the second agent is also a strong irritant. am. Therefore, a significant number of people who use oxidized hair dyes complain of various symptoms such as skin irritation, rashes, rashes, swelling, and breathing problems during or after use.

Meanwhile, direct dyes and basic dyes (basic dyes, cationic dyes) are used in hair dyeing products as dyes for hair dyeing that have significantly less risk of allergy and irritation. Most products using these dyes do not use oxidizing agents and are mainly used in fashion products such as red, blue, and yellow. They are used after bleaching the hair brightly with a bleaching agent before use. On the other hand, when used as a gray hair cover product, the hair dyeing effect is significantly low, making it difficult to obtain a satisfactory effect.

The reason is that basic dyes, which have a relatively large molecular weight compared to oxidized dyes that develop color through condensation by deeply penetrating into the hair with dye precursors (intermediates) and couplers (colorants), are difficult to penetrate into the inside of normal hair with cuticles, and hair contains negative ions. Hair is dyed in the form of a basic dye with cationic properties attached to the surface, but there is a limit to the degree to which it adheres to the surface. When shampoo is used for washing after use, the basic dye attached to the hair through the anionic surfactant contained in the shampoo is dyed. Because the dye can easily fall off, it is difficult to achieve excellent results with gray hair cover products. Direct dyes can also penetrate into the hair, but they penetrate relatively deeply into the hair and are difficult to fix, and there is a problem in that they easily fall off when washed with shampoo.

To solve this problem, a technology has been developed to adjust the pH of the base color dye solution containing an alkaline reducing agent to 7.5 to 9 to increase penetration of the dye, then apply a catechin aqueous solution and expose it to far-infrared rays. However, this has low storage stability and requires a long time during the dyeing process. There is a problem with this complexity that there are limits to actually commercializing it.

Numerous documents are referenced and cited throughout this specification. The disclosures of the cited documents are incorporated herein by reference in their entirety to more clearly explain the content of the present invention and the level of technical field to which the present invention pertains.

Republic of Korea Patent Publication No. 10-2016-0085702 Republic of Korea Patent Publication No. 10-2013-0033291

The purpose of the present invention is to provide a composition for hair that does not contain oxidized hair dyes that cause allergies and irritation, and can provide excellent hair dyeing power and color retention with only basic dyes and/or direct dyes.

Another object of the present invention is to provide compositions and preparations for hair dyeing in which hair dyeing power and color retention are further improved by additionally prescribing a cationic polymer in a hair dyeing composition containing a basic dye and/or a direct dye. .

Other objects and advantages of the present invention will become clearer from the following detailed description, claims, and drawings.

One aspect of the present invention is to improve color development and color retention, using at least one dye selected from the group consisting of basic dyes and direct dyes; And to provide a composition for hair containing a cationic polymer.

The present invention has found that color development and color retention, which are conventional shortcomings, can be further improved by additionally prescribing a cationic polymer to a hair composition containing basic dye or direct dye.

In one embodiment, the cationic polymer may be one or more selected from the group consisting of acrylic polymers, silicones, polyamides, polyether polyurethanes, polyquaternium, and polyurethanes.

In a preferred embodiment, the cationic polymer may be a cationic polymer with a long linker, such as polyurethane-10. The linker refers to a chain that connects the polymer main chain and a cationic functional group. Cationic polymers usually used for hair have short linkers, so if a large dye is attached to the hair, it may be difficult to bind to the hair. . On the other hand, since the hair composition of the present invention contains a cationic polymer with a long linker, it can bind to dye and hair at the same time. Therefore, it is expected to exhibit significantly excellent color development and color retention, and is not limited to the above theory. The operating principle of the cationic polymer with a long linker expected in the present invention is shown in Figure 1.

In the composition of the present invention, the cationic polymer with a long linker can enhance the dyeing effect and make the dyeing effect last longer through hair coating. Preferably, polyurethane-10 can be used as the cationic polymer. When using polyurethane-10, it acts simultaneously on the dye and hair through a long linker, so when using other cationic polymers such as acrylic polymers, silicones, polyamides, polyether polyurethanes and/or polyquaternium. It can exhibit more excellent effects, such as better color development and color retention. The polyurethane-10 can be made from commercially available raw materials.

Another aspect of the present invention is to provide a hair preparation containing the hair composition.

The hair preparation may be selected from shampoos, conditioners, treatments, preparations for hair dyeing, hair ampoule, hair toner and hair fixative products, and is preferably a preparation for hair dyeing.

In one embodiment, the hair dyeing agent may be composed of one formulation, or may be composed of two or more formulations. Preferably, it may be in two formulations, and more preferably, it may be stored, distributed, and/or sold separately from the alkaline agent. By storing it separately from alkaline agents, the decomposition of raw materials can be suppressed and the effect of increasing dyeing power can be further increased.

In one embodiment, the hair dyeing agent includes (i) a first agent comprising at least one selected from the group consisting of basic dyes and direct dyes; and (ii) a second agent containing an alkaline agent or an alkaline reducing agent, wherein the first agent and the second agent are contained separately, and the first agent and the second agent are mixed or reapplied immediately before use. It is used, and when the first agent and the second agent are mixed or applied, the pH may be 8 to 14, pH 8 to 12, pH 11 ± 1, or pH 11 ± 0.5, and the first agent , the second agent, or the first and second agents may include a cationic polymer.

In one embodiment, the cationic polymer may be included in an amount of 0.01 to 20% by weight, preferably 0.1 to 15% by weight, and more preferably 0.1 to 5% by weight, based on the total content of the hair dyeing agent ingredients. may be included. If the cationic polymer is included within the above content range, the dyeing power and/or color maintenance effect may be more excellent.

The present inventors found that the reason hair dyes containing existing basic dyes or direct dyes do not show good dyeing effects is because the dye has poor adhesion to the hair or because the dye and alkaline agent are included together in a mixed form. and came to construct the formulation of the present invention to solve this problem.

The basic dye (basic dye or cationic dye) used in the present invention is a dye that has an amino group or a substituted amino group in the molecule and becomes a cation in an aqueous solution, and those conventionally known as basic dyes can be used without particular limitation. Since basic dyes become positive ions in an aqueous solution, they dye by ionic bonding with the negative portion of the keratin protein on the hair surface. Specific examples include, for example, Basic Blue 7 (C.I.42595), Basic Blue 16 (C.I.12210), Basic Blue 22 (C.I.61512), Basic Blue 26 (C.I.44045), Basic Blue 99 (C.I.56059), Basic Blue 117, Basic Violet 10 (C.I.45170), Basic Violet 14 (C.I.42515), Basic Brown 16 (C.I.12250), Basic Brown 17 (C.I.12251), Basic Red 2 (C.I.50240), Basic Red 12 (C.I.48070) , Basic Red 22 (C.I.11055), Basic Red 51, Basic Red 76 (C.I.12245), Basic Red 118 (C.I.12251:1), Basic Orange 31, Basic Yellow 28 (C.I.48054), Basic Yellow 57 (C.I.12719) , Basic Yellow 87, Basic Black 2 (C.I.11825), etc. These may be used individually or in combination of two or more types. However, it is not limited to these, and all dyes that are generally known as basic dyes can be used.

According to what the inventors of the present application have discovered, the closer a basic or direct dye is to neutrality (pH 4 to 9, more preferably pH 4 to 7.5), the more stable it is. If the pH is lower or higher than this range, the dye decomposes during storage and loses its original color. It may appear a different color or lose its color. Therefore, basic or direct dyes must be included separately from the second agent containing an alkali or an alkaline reducing agent, and to enhance the dyeing effect before use, they must be mixed with an alkaline agent or a second agent containing an alkaline reducing agent or applied to the hair sequentially. It is desirable to apply it.

As the alkaline agent included in the second agent of the present invention, all alkaline agents widely used in cosmetics can be used without any particular limitation. For example, sodium hydroxide, potassium hydroxide, ethanolamine, diethanolamine, ammonia, ammonium carbonate, triethanolamine, aminomethylpropanol, tromethamine, etc. can be used, and one or more types can be mixed. In addition, alkaline reducing agents such as thioglycolates and inorganic sulfites can also be used without specific limitations to achieve similar effects.

In a preferred embodiment, the alkaline agent included in the second agent may be an amine compound such as ethanolamine, diethanolamine, ammonia, ammonium carbonate, triethanolamine, aminomethylpropanol, and tromethamine. In this case, sodium hydroxide and potassium hydroxide are used. It can have better dyeing performance than when it contains an inorganic alkaline agent such as.

The first agent of the present invention may use a direct dye instead of a basic dye. Additionally, the first agent may include both a basic dye and a direct dye.

The direct dye is also called HC dye, which is a dye with the known 'HC' as a prefix. Since it is a dye with a small molecular diameter, it penetrates into the inside of the hair and dyes through hydrogen bonding or intermolecular attraction. Specific examples include, for example, HC Blue No. 2, HC Blue No. 8, HC Orange No. 1, HC Orange No. 2, HC Red No. 1, HC Red No. 3, HC Red, No. 7. , HC Red No.8, HC Red No.10, HC Red No.11, HC Red No.13, HC Red No.16, HC Violet No.2, HC Yellow No.2, HC Yellow No.5, HC Examples include Yellow No.6, HC Yellow No.7, HC Yellow No.9, and HC Yellow No.12. These may be used individually or in combination of two or more types. However, it is not limited to these, and all dyes commonly known as direct dyes can be used.

The preparation for hair dyeing of the present invention may substantially contain no oxidizing hair dye and/or oxidizing agent in either the first agent or the second agent.

Here, the term “substantially free from” may mean that it completely lacks the ingredient, or contains so little of the ingredient that the effect is the same as if it completely lacks the ingredient. In other words, a preparation that is “substantially free” of an ingredient or element may still substantially contain such item, as long as it has no measurable effect. The term “substantially free” refers to the total amount of ingredients in the preparation, unless otherwise indicated. It means 1% by weight or less, 0.5% by weight or less, or 0.3% by weight or less, preferably 0.1% by weight or less, 0.05% by weight, or 0.03% by weight or less, and more preferably 0.01% by weight or less.

The oxidation hair dye is a concept that includes one or more types of oxidation dye precursors that are usually oxidized to develop color. The oxidation dye precursors include paraphenylenediamine, paratoluylenediamine, 2-chloro-paraphenylenediamine, and 2,3- Dimethyl-paraphenylenediamine, 2,6-dimethyl-paraphenylenediamine, 2,6-diethyl-paraphenylenediamine, 2,5-dimethyl-paraphenylenediamine, N, N-dimethyl -Paraphenylenediamine, N,N-diethyl-paraphenylenediamine, N,N-dipropyl-paraphenylenediamine, 4-amino-N,N-diethyl-3-methylaniline, N,N- Bis(betahydroxyethyl)-paraphenylenediamine, 4-amino-N,N-bis(betahydroxyethyl)-3-methylaniline, 4-amino-3-chloro-N,N-bis( Beta hydroxyethyl)-aniline, 2-beta-hydroxyethyl-paraphenylenediamine, 2-fluoro-paraphenylenediamine, 2-isopropyl-paraphenylenediamine, N-(betahydroxypropyl) )-Paraphenylenediamine, 2-hydroxymethyl-paraphenylenediamine, N,N-dimethyl-3-methyl-paraphenylenediamine, N-(beta, gamma-dihydroxypropyl)-paraphenylene Paraphenylenediamine series dyes such as diamine, N-(4'-aminophenyl)-paraphenylenediamine, N-phenyl-paraphenylenediamine, and 2-betahydroxyethyloxy-paraphenylenediamine. Acid salt, para-aminophenol, 4-amino-3-methylphenol, 4-amino-3-fluorophenol, 4-amino-3-hydroxymethylphenol, 4-amino-2-methylphenol, 4-amino -2-Hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4-amino-2-(betahydroxyethylaminomethyl)phenol, 4-amino- Dyes of the para-aminophenol series such as 2-fluorophenol or their acid salts, 2-aminophenol, 2-amino-5-methylphenol, 2-amino-6-methylphenol, 5-acetamido-2- There are dyes of the orthoaminophenol series such as aminophenol and their acid salts, and other heterocyclic-containing dyes such as pyridine derivatives such as 2,5-diaminopyridine and 2,4,5,6-tetraaminopyridine. Pyrimidine derivatives such as midine, 4-hydroxy-2,5,6-triaminopyrimidine, 4,5-diamino-1-methylpyrazole, 3,4-diaminopyrazole, 4,5-dia and pyrazole derivatives such as mino-1-(4'-chlorobenzyl)pyrazole. Oxidizing agents that oxidize the oxidized dye precursor include hydrogen peroxide, urea peroxide, alkali metal bromate, perborate, and persulfate.

In a preferred embodiment of the present invention, the first agent of the present invention has a neutral pH and the second agent has an alkaline pH.

As described above, the present invention includes a first agent and an alkaline agent in which one or more basic dyes and direct dyes are mixed or included alone in order to enhance the hair attachment effect of basic dyes and/or direct dyes, which are known to be relatively safe. It consists of a second agent, and in the case of various types of basic dyes and direct dyes, the stability of the dye can be secured in the neutral pH range. Here, neutral pH means pH 4 to pH 9, preferably pH 4 to 7.5. In the case of basic dyes and direct dyes, the long-term stability of the dye may decrease due to hydrolysis at relatively high or low pH (over pH 9, less than pH 4). The downside is that it is difficult to secure.

In addition, basic dyes have the problem of being decomposed by the oxidation reaction of hydrogen peroxide if they are stored with hydrogen peroxide at low pH (for example, less than pH 2 to 4). Additionally, in the case of basic dyes or direct dyes, the lower the pH, the lower the solubility in water, so there is a possibility that the dye may precipitate over a long period of time.

The alkaline pH of the second agent means more than pH 7, and the pH after mixing the first agent and the second agent is at least 7, preferably the pH after mixing is 8 to 14, the pH is 8 to 12, and the pH is 11. ±1, or it means having alkalinity to the extent that the pH can be 11±0.5.

In this way, when the pH of the mixed solution is set to alkaline conditions, there is an advantage in that the dyeing effect of basic dyes and/or direct dyes can be further improved. Under alkaline conditions, cationic dyes have the effect of strongly attaching ionic bonds to the hair surface. Under alkaline conditions, the cuticle on the hair surface softens and swells, making it easier for direct dyes or basic dyes to penetrate into the hair, increasing the dyeing effect. It has a significantly increased effect and is also effective in maintaining the dyed color.

Specifically, basic dyes with cationic properties in aqueous solution bind to the surface of hair with anionic properties or penetrate into the interior, but basic dyes have a large molecular weight, making it difficult for them to easily penetrate or attach to the hair in large amounts. The present inventors found that when dyeing under alkaline conditions, the binding force between the hair surface and the basic dye increases, and the hair cuticle swells due to the alkaline component, so that the basic dye penetrates the inside more easily and the area that can bind to the surface increases, thereby increasing the dyeing effect. It was discovered that Afterwards, if you use a mildly acidic shampoo, the cuticle on the hair surface will be organized so that the basic dye that has entered the hair will not fall off easily.

The hair dyeing agent of the present invention is far superior to existing commercial products in terms of color development and color maintenance after dyeing. Currently commercially available products with basic dyes generally have a color difference value (ΔE) lower than 25, and most of the basic dyes are removed from the hair after 1 to 2 shampoos.

On the other hand, after dyeing hair using the hair dyeing agent of the present invention, the color difference value (ΔE) of the hair before and after dyeing, as measured using HunterLab's LabSacn XE as a color difference meter for color measurement, is 25 or more. Do it as The range in which the hair color difference value (ΔE) is 25 or more is, for example, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41. , 42, 43, 44, 45, 46, 47, 48, 49, or 50 or more. More preferably, the color difference value (ΔE) measured before and after dyeing using the agent of the present invention may be 30 to 50.

In addition, after dyeing the hair using the hair dyeing agent of the present invention, the dyed hair was washed with shampoo once and then the color difference of the hair before and after shampoo was measured using HunterLab's LabSacn XE, a colorimeter for color measurement. The color difference value (ΔE) may be 3 or less, preferably 2 or less, 1 or less, 0.5 or less, or 0.1 or less.

After dyeing the hair using the hair dyeing agent of the present invention, the dyed hair was washed with shampoo three times and then measured using HunterLab's LabSacn The color difference value (ΔE) may be 5 or less, preferably 4 or less, 3 or less, 2 or less, 1 or less, 0.5 or less, or 0.1 or less.

After dyeing the hair using the hair dyeing agent of the present invention, the dyed hair was washed with shampoo 5 times and then measured using HunterLab's LabSacn The color difference value (ΔE) may be 6 or less, for example, 5, 4, 3, 2, or 1 or less.

Color difference values are in CIE 1976 L*a*b* color space. The L*, a*, b* coordinate values indicated by the color tone tab can be measured and calculated using the following calculation formula.

The hair dyeing agent of the present invention may be used by mixing the first agent and the second agent immediately before using it on the hair, or by applying the first agent to the hair first and then applying the second agent, or It can also be used by first applying the second agent to the hair and then applying the first agent. In this way, even if the first agent containing a dye is applied to the hair first and the second agent containing an alkaline agent is applied over the hair or the order is reversed, the dyeing effect is similar to that of mixed use because the pH condition is alkaline when used. .

Figure 1 is a schematic diagram showing the principle in which a cationic polymer with a long linker acts simultaneously on dye and hair.
Figure 2 shows the results of evaluating the dyeing effect according to the addition of cationic polymer.
Figure 3 shows the results of evaluating the color retention effect according to the addition of cationic polymer.

Hereinafter, the present invention will be described in more detail through examples. These examples are only for illustrating the present invention in more detail, and it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples.

Example

The substances and reagents used in this example were purchased and used from cosmetic raw material manufacturers and commercial suppliers, and the content indicated in the example is based on weight percent.

1. Dyeing effect and color maintenance effect due to addition of cationic polymer

Comparative Composition 1 without the addition of a cationic polymer and a hair dye composition with the addition of a cationic polymer (polyquaternium-6 or polyurethane-10) were used as Composition Specifically, it was prepared as follows.

(1) Comparative composition 1

Agent 1: Mix and add the dye ingredients Basic Brown 16, Basic Blue 99, and HC Blue 16 to a cream based on cetearyl alcohol so that the total amount is 1% of the cream, and benzyl alcohol and glycerin are added at a total amount of 5%. It was prepared as follows.

Agent 2: A cream based on cetearyl alcohol was prepared by adjusting the content of ethanolamine, an alkaline agent, so that the pH was 11 when mixed 1:1 with agent 1.

(2) Composition

Agent 1: Mix and add the dye ingredients Basic Brown 16, Basic Blue 99, and HC Blue 16 to a cream based on cetearyl alcohol so that the total amount is 1% of the cream, and benzyl alcohol and glycerin are added at a total amount of 5%. Below, it was manufactured containing less than 5% of cationic polymer (Polyquaternium-6).

Agent 2: A cream based on cetearyl alcohol was prepared by adjusting the content of ethanolamine, an alkaline agent, so that the pH was 11 when mixed 1:1 with agent 1.

(3) Composition Y

Agent 1: Mix and add the dye ingredients Basic Brown 16, Basic Blue 99, and HC Blue 16 to a cream based on cetearyl alcohol so that the total amount is 1% of the cream, and benzyl alcohol and glycerin are added at a total amount of 5%. Below, it was manufactured containing 5% or less of cationic polymer (Polyurethane-10).

Agent 2: A cream based on cetearyl alcohol was prepared by adjusting the content of ethanolamine, an alkaline agent, so that the pH was 11 when mixed 1:1 with agent 1.

The dyeing effect and color maintenance effect of Comparative Composition 1 and Compositions X and Y prepared above were measured according to the following evaluation method, and the results are shown in Figures 2 and 3, respectively.

- Dyeing conditions: Apply a mixture of the above agents 1 and 2 in equal amounts to an experimental white hair tress (human hair, Shanghai Canyu Trading Co., Ltd.) just before dyeing, leave for 30 minutes at 30℃ and 60% humidity, and wash with running lukewarm water. After washing with , it was completely dried.

- Dyeing effect: The color change before and after dyeing was measured based on dE using HunterLab's Agera Spectrophotometer (the greater the color change, the better the dyeing effect).

- Color retention effect: In order to compare the color retention effect after dyeing, the color change according to the number of shampoo washes was measured based on before shampoo wash (the smaller the color change, the better the color retention effect). Using the applicant's Charming Green Shower Shampoo, about 1/10 g of shampoo was applied to the hair tress and the hair was massaged for 1 minute. Afterwards, the shampoo was completely washed with lukewarm water (about 30°C), the hair was completely dried, and the color change was measured.

Both polyquaternium-6 and polyurethane-10 can perform similar functions, but the dyeing effect (Figure 2) and color maintenance effect (Figure 3) of composition There was no significant difference from Comparative Composition 1 without addition. On the other hand, Composition Y containing polyurethane-10 as a cationic polymer showed a better dyeing effect than Comparative Composition 1 and Composition It was confirmed to have a maintenance effect (Figure 3).

Claims (16)

One or more dyes selected from the group consisting of basic dyes and direct dyes; and a composition for hair comprising a cationic polymer. The composition for hair according to claim 1, wherein the cationic polymer is one or more selected from the group consisting of acrylic polymers, silicones, polyamides, polyether polyurethane, polyquaternium, and polyurethane. The composition for hair according to claim 1, wherein the cationic polymer includes polyurethane-10. A hair preparation comprising the composition for hair according to any one of claims 1 to 3. 5. Hair preparation according to claim 4, wherein the hair preparation is selected from shampoos, conditioners, treatments, preparations for hair dyeing, hair ampoules, hair toners and hair fixative products. The hair preparation according to claim 4, wherein the hair preparation is a preparation for hair dyeing. The method of claim 6, wherein the hair dyeing agent
(i) a first agent comprising at least one selected from the group consisting of basic dyes and direct dyes; and (ii) a second agent comprising an alkaline agent or an alkaline reducing agent,
The first and second agents are contained separately,
The first and second agents are mixed or reapplied immediately before use,
When the first and second agents are mixed or applied, the pH is 8 to 14,
A preparation for hair dyeing, characterized in that the first agent, the second agent, or the first and second agents include a cationic polymer. The preparation for hair dyeing according to claim 7, wherein the first agent contains both a basic dye and a direct dye. The preparation for hair dyeing according to claim 7, wherein the preparation for hair dyeing does not substantially contain an oxidizing hair dye,
Here, the term “substantially not included” means that the content of oxidized hair dye is 1% by weight or less based on the total content of the preparation ingredients. The preparation for hair dyeing according to claim 7, wherein the preparation for hair dyeing substantially does not contain an oxidizing agent,
Here, the term “substantially not included” means that the content of the oxidizing agent is 1% by weight or less based on the total content of the formulation components. The preparation for hair dyeing according to claim 7, wherein the pH of the first agent is 4 to 9. The preparation for hair dyeing according to claim 7, wherein the pH of the first agent is 4 to 7.5. The preparation for hair dyeing according to claim 7, wherein the alkaline agent is an amine compound and/or an inorganic compound. The method of claim 7, wherein after dyeing the hair using the hair dyeing agent, the color difference value (ΔE) of the hair before and after dyeing, as measured using HunterLab's LabSacn A preparation for hair dyeing. The method of claim 7, wherein after dyeing the hair using the hair dyeing agent, the dyed hair is washed with shampoo 5 times and then measured using HunterLab's LabSacn A preparation for hair dyeing, characterized in that the color difference value (ΔE) of the hair after 5 times is 6 or less. The preparation for hair dyeing according to claim 7, wherein the cationic polymer is contained in an amount of 0.1 to 5% by weight based on the total weight of the preparation for hair dyeing.

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