JP2002322035A - Pretreatment agent for hair color, treatment agent for hair color and method for treating hair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pretreatment agent for hair color and a treatment agent for hair color capable of preventing damages to the hair in treating the hair color, bringing the color to be well fixed and improving stiff feeling after the hair color treatment, and provide a method for treating the hair using these agents. SOLUTION: The pretreatment agent for hair color contains a keratin hydrolyzed product and/or its derivative and is capable of being used as the pretreatment agent in treatment agents comprising a pretreatment agent and an after-treatment agent respectively used before and after the hair color treatment. The hair is treated by appling the retreating agent thereto, carrying out the hair color treatment and, if needed, applying the after-treating agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a pretreatment agent used before hair color treatment, and a hair color comprising a pretreatment agent used before and after hair color treatment and a post-treatment agent used after. And a hair treatment method using the same. ADVANTAGE OF THE INVENTION According to this invention, it is effective in preventing damage to the hair at the time of a hair color process, improving the fixation of a dye, and improving the feeling of roughness after a hair color process.

[0002]

[Prior Art] For the purpose of dyeing gray hair or fashion,
Conventionally, oxidative hair dyes, acidic hair dyes, and the like have been used. Of these, commonly used are oxidative hair dyes that have a hair dyeing action and bleaching action. In this hair dye, the oxidation dye and hydrogen peroxide penetrate inside the hair, and the oxidation dye is oxidatively polymerized. The color is developed. At the same time, hydrogen peroxide oxidizes and decomposes melanin pigment in hair in the presence of alkali. It is said that such an oxidative hair dye is excellent in that it can be dyed brighter than the hair originally has, and that the color fading is extremely reduced. However, the oxidative hair dye has a problem that swelling of the hair by alkali or destruction of the hair tissue by hydrogen peroxide causes an increase in damage to the hair and a decrease in the strength of the hair. Was.

[0003] On the other hand, the acidic hair dye utilizes a mechanism in which an acid dye is dyed under acidic conditions by ionic bonding with an amino group of hair keratin. Since this acidic hair dye has no bleaching action and has an acidic pH, hair damage is less than that of an oxidative hair dye. However, when an acidic hair dye is used, the hair tends to converge and become harder by repeating the treatment, and a solvent (such as benzyl alcohol) incorporated as a penetrant for the dye
However, there is a problem that the feel of the hair deteriorates because the hair is degreased.

As a hair treatment agent which solves the above-mentioned problems, a treatment agent containing a protein hydrolyzate derived from animals and plants or a microorganism or a derivative thereof (Japanese Patent Laid-Open No. 10-2)
No. 26629), a treating agent containing a keratin hydrolyzate or a derivative thereof (Japanese Patent Laid-Open No. 10-291919), a keratin hydrolyzate or a derivative thereof and a protein hydrolyzate or a microorganism-derived protein or a derivative thereof other than keratin. Processing agent contained (Japanese Unexamined Patent Application Publication No. 11-1399)
No. 40) has been proposed. However, although these treatment agents can prevent hair damage during hair color treatment to some extent, they are insufficient for improving the fixation of the dye and improving the feeling of crunch after the hair color treatment.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the prior art, and an object of the present invention is to prevent hair from being damaged in a hair color treatment, An object of the present invention is to provide a hair color pretreatment agent and a hair color treatment agent capable of improving fixation and improving a feeling of stiffness after hair color treatment, and a hair treatment method using the same.

[0006]

Means for Solving the Problems The pretreatment agent for hair color of the present invention which can solve the above-mentioned problems is a pretreatment agent used before and after the hair color treatment, and includes a keratin hydrolyzate and / or It has a gist in containing its derivative. In this pretreatment agent, the pH is preferably in the range of 4 to 8, and α-keratose is preferably used as the keratin hydrolyzate. In treating hair with this pretreatment agent, the hair color treatment may be performed after applying this pretreatment agent to the hair.

On the other hand, the hair color treating agent of the present invention which can solve the above-mentioned problems is a hair color treating agent comprising a pre-treatment agent and a post-treatment agent used before and after the hair color treatment. The pretreatment agent has a gist in that it contains a keratin hydrolyzate and / or a derivative thereof. In this treatment agent, the pH of the pretreatment agent is preferably in the range of 4 to 8, and α-keratose is preferably used as the keratin hydrolyzate contained in the pretreatment agent.

In this treating agent, the post-treating agent comprises:
Ceramides, ceramide derivatives, those containing one or more selected from the group consisting of phospholipids and phospholipid derivatives are preferred, and further, if necessary, further plant-derived protein hydrolysates, plant-derived protein hydrolysates It is also effective to contain at least one selected from the group consisting of a protein hydrolyzate derived from egg white and a protein hydrolyzate derived from egg white.

In treating hair with the hair coloring treatment agent of the present invention, a hair treatment is performed after applying a pre-treatment agent to hair, and then a post-treatment agent is applied. good. In addition, as a more specific procedure in this method, (1) after applying a pre-treatment agent, performing a hair color treatment, then applying a post-treatment agent and washing away,
(2) After applying the pretreatment agent, perform hair color treatment,
Thereafter, a configuration in which a post-treatment agent is applied and not washed away can be used.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is constituted as described above. In short, the present invention relates to (1) a pretreatment agent for hair color, or (2) a pretreatment agent for hair color comprising a pretreatment agent and a posttreatment agent. Keratin hydrolyzate and / or
Or, by treating the hair with a hair containing a derivative thereof before the hair color treatment, keratin was adsorbed to the hair, thereby preventing damage due to the hair color and improving fixation of the dye. .

The pretreatment agent for hair color of the present invention or the pretreatment agent used in the treatment agent for hair color must contain a keratin hydrolyzate or a derivative thereof as described above. The part where the hair is particularly severely damaged has a strong hydrophilic property, so that the dye is poorly fixed and is easily discolored.
Therefore, it is very effective to apply a pretreatment agent containing a highly hydrophobic keratin hydrolyzate or a derivative thereof to hair so as to increase the hydrophobicity of the hair itself.

The keratin hydrolyzate (hydrolyzed keratin) includes α-keratose (crystalline keratin) and γ
-Keratose (amorphous keratin), but α-keratose is more preferred for increasing hydrophobicity. Α-Keratose is also excellent in improving the slippage of hair.
Keratin hydrolyzate with a large average molecular weight alone tends to have a hard feel, but in order to eliminate this,
Flexibility can be imparted by using in combination with a keratin hydrolyzate having a small average molecular weight or a derivative thereof, or by using such a derivative alone.

The pretreatment agent is usually prepared as an aqueous solution, but by adding an alcohol (eg, ethanol, propylene glycol, etc.) as a solvent to increase the hydrophobic environment, the keratin hydrolyzate or its derivative is
Since the structure having the hydrophilic group inside and the hydrophobic group outside can be increased, the hydrophobic bond with the hair can be improved.

The pH of the pretreatment agent of the present invention is preferably in the range of 4 to 8 in consideration of the effect of preventing damage due to hair color and the prevention of discoloration during hair color treatment. If the pH of the pretreatment agent is out of this range, the effect of preventing damage is not sufficiently exhibited, and the color of a hair color to be performed next changes, which may be different from the expected color.
The pH of the pretreatment agent is more preferably in the range of about 6 to 7, and within this range, the treatment effect of the pretreatment is most effectively exhibited.

Using the above hair color pretreatment agent,
Although the above effects can be obtained by performing only the pre-treatment before the hair color treatment, treatment with a post-treatment agent after such hair color treatment is more effective. The post-treatment agent used at this time may be a commonly used post-treatment agent, but may be a post-treatment agent containing at least one selected from the group consisting of ceramide, ceramide derivatives, phospholipids and phospholipid derivatives. It is preferable to use such a post-treatment agent, and by treating the hair after the hair color treatment with the use of such a post-treatment agent, it is possible to enhance the moisturizing property of the hair, to impart flexibility, and to improve the feeling of crunch after the hair color treatment. These components not only have high moisturizing properties, but also have excellent shampoo resistance, and exhibit excellent effects of improving the feel of the touch. Among them, ceramide or a derivative thereof includes N-stearoyloxyheptacosanoylphytosphingosine, N-stearoylsphingosine, N-stearoylphytosphingosine, N-oleoylphytosphingosine, N-2-hydroxystearoylphytosphingosine, phytosphingosine, Glycosphingoglycolipid (plant ceramide) and the like. Further, as a phospholipid or a derivative thereof,
Examples include hydrogenated soybean phospholipids, hydroxylated soybean phospholipids, and hydrogenated soybean lysophospholipids.

The post-treatment agent used in the present invention may further comprise, if necessary, a plant-derived protein hydrolyzate, a plant-derived protein hydrolyzate, an egg white-derived protein hydrolyzate, and an egg white in addition to the above components. It is also effective to include one or more selected from the group consisting of derivatives of protein hydrolysates derived from the same. By containing these substances, while increasing the moisture retention of the hair,
The snagging at the time of application to hair can be improved.
As a plant-derived protein hydrolyzate or a derivative thereof, soybeans, wheat, corn, almond, oats and the like obtained by hydrolyzing protein hydrolysates, esters of these protein hydrolysates, cationized products, acylated products or And salts and silylated products thereof. A cationized product is particularly effective in improving the catch during application to hair.

The post-treatment agent of the present invention preferably contains an acid, a salt, or an acid and a salt in order to remove the alkali remaining on the hair after the hair color treatment. However, rapid neutralization with an acid causes a decrease in hair strength and may cause discoloration, and therefore, it is more preferable to neutralize by adding a salt. Such salts include citrate, lactate, glycolate and the like.

The pH of the post-treatment agent of the present invention is preferably in the range of 4 to 9 in consideration of discoloration of the hair color. If the pH of the post-treatment agent is out of this range, the color of the hair color may change after the application of the post-treatment agent. The pH of the post-treatment agent is more preferably in the range of 5 to 5.
It is about 8, and within this range, the processing effect by the post-processing is most effectively exhibited.

When a salt is contained in the post-treatment agent to increase the viscosity so that it can be easily applied to the hair, use an alkyl acrylate.
The viscosity is preferably increased by an alkyl methacrylate / polyoxyethylene stearyl ether copolymer emulsion or the like. A carboxyvinyl polymer or the like generally used as a thickener cannot obtain a stable viscosity if it contains a salt or a protein hydrolyzate.

The hair color treating agent of the present invention comprising a pre-treatment agent and a post-treatment agent can contain various components in addition to the above-mentioned components, as long as the effects of the present invention are not impaired. . That is, higher alcohols such as myristyl alcohol, cetyl alcohol, stearyl alcohol,
Liquid paraffin, Vaseline, hydrocarbons such as squalane, isopropyl myristate, isopropyl palmitate, ester oils such as decyl oleate, camellia oil,
Animal and vegetable oils such as jojoba oil, olive oil and mink oil, waxes such as beeswax and candelilla wax, silicone oils such as dimethylpolysiloxane and methylphenylpolysiloxane, higher fatty acids such as palmitic acid, stearic acid and behenic acid, Polyhydric alcohols such as ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin and sorbitol; humectants such as sodium hyaluronate, sodium pyrrolidone carboxylate and sodium lactate; polyglycerin fatty acid esters; polyoxyethylene sorbitan fatty acid esters; Nonionic surfactants such as polyoxyethylene alkyl ethers,
Anionic surfactants such as alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkyl sulfosuccinates, alkyl ether carboxylates, N-acyl glutamates, alkyl betaines, alkyl amidopropyl betaines, imidazolinium betaines, etc. Amphoteric surfactants, cationic surfactants such as alkyltrimethylammonium chloride, dialkyldimethylammonium chloride, protein hydrolysates other than the above, amino acids such as glycine, proline, serine, xanthan gum, hydroxyethylcellulose, hydroxypropylcellulose, etc. Viscous agent, polyvinylpyrrolidone, vinylpyrrolidone / vinyl acetate copolymer, acrylic resin alkanolamine solution, N-methacryloyloxyethyl N, N-dimethylammonium Set resins such as um-α-N-methylcarboxybetaine / alkyl methacrylate copolymer, vinylpyrrolidone / N, N-dimethylaminoethyl methacrylic acid diethyl sulfate solution, sequestering agent, pH adjuster , A preservative, an ultraviolet absorber, an antioxidant, a dye, a fragrance, and the like can be appropriately compounded as necessary.

The form of the pre-treatment agent and post-treatment agent in the hair color treatment agent of the present invention can be of various types such as liquid, mist, cream, gel, foam, and aerosol, and is particularly limited. Not something.

In treating hair using the hair color treatment agent of the present invention as described above, a hair color treatment is performed after applying a pre-treatment agent, and then a post-treatment agent is applied. The effect is achieved. In this method, after the pretreatment agent is applied, it may not be dried, or may be dried by heating with a drier, a steamer or the like. The keratin hydrolyzate or a derivative thereof contained in the pretreatment agent penetrates when the hair is wet, and is strongly adsorbed to the hair by hydrophobic bonding when dried. In order to exhibit these effects effectively, after applying the pretreatment agent,
It is preferable to leave for a certain period of time while heating. After the application of the post-treatment agent after the color treatment, it may or may not be washed away. However, in order to further improve the effect, it is preferable to leave the post-treatment agent heated for a certain period of time after the application of the post-treatment agent.

It is to be noted that the post-treatment agent of the present invention can be applied before the hair color treatment, and such a method of use can also prevent the hair color from being damaged.
In particular, by applying a post-treatment agent containing an oil (for example, silicone) to a severely damaged portion of the hair, it is possible to reduce the staining of the hair color and to prevent damage. After the treatment with the hair color treating agent of the present invention, the condition of the hair can be further adjusted by using a hair treatment or a hair cream.

Next, the present invention will be described in detail with reference to examples, but the following examples do not limit the present invention.
Modifications and alterations without departing from the spirit of the preceding and the following are all included in the technical scope of the present invention.

[0025]

EXAMPLES (Examples 1 to 5, Reference Example 1) Pretreatment agents having the compositions shown in Table 1 below were prepared. In addition, the compounding quantity of each component in a table | surface is a mass%.

[0026]

[Table 1]

Using the above pretreatment agent, the following treatment is carried out,
The fixability of the dye was evaluated. Table 2 shows the results.

(Dye fixability) (1) Treatment method The hair bundle was treated once with a high bleach (a high bleaching agent: manufactured by Nakano Pharmaceutical Co., Ltd.) to prepare damaged hair. The high bleach hair was immersed in each pretreatment agent at 40 ° C. for 30 minutes, dehydrated, wrapped in wrap at 40 ° C. for 30 minutes, heated, rinsed, and air-dried. The hair bundle treated with the pretreatment agent was dyed with an oxidative hair dye (Ash: manufactured by Nakano Pharmaceutical), and the hair bundle was immersed in a 2% aqueous solution of triethanolamine lauryl sulfate at 60 ° C. for 1 hour. (2) Colorimetry L *, a *, and b * of the hair bundle subjected to the above treatment are measured by a color difference meter, and the b * values are compared to determine the fixability of the dye of the oxidative hair dye (ash). Was evaluated. The smaller the b * value, the stronger the bluish color and the better the fixability of the dye.

[0029]

[Table 2]

As is apparent from the results, Examples 1 to 5 using the pretreatment agent of the present invention have a small b * value, leave ash bluish easily discolored, and have excellent dye fixing properties. You can see that it is. In particular, it can be seen that Example 1 using α-keratose was excellent in dye fixability. On the other hand, in Reference Example 1 in which the pretreatment agent of the present invention was not used, the b * value was large, and it was found that the fixing of the dye was poor.

(Examples 6 to 11, Reference Example 2) Pretreatment agents having the compositions shown in Table 3 below were prepared. The amount of each component in the table is% by mass.

[0032]

[Table 3]

The dye fixability of the above pretreatment agent was evaluated, and the results are shown in Table 4. The evaluation method is the same as the methods of Examples 1 to 5 and Reference Example 1.

[0034]

[Table 4]

As is clear from the results, Examples 6 to 11 using the pretreatment agent of the present invention have small b * values,
The bluish color of the ash which is easily discolored remains, indicating that the dye has excellent fixability. On the other hand, in Reference Example 2 in which the pretreatment agent of the present invention was not used, the b * value was large, indicating that the fixing of the dye was poor.

(Examples 12, 13 and Reference Example 3)
No. shown in FIG. The fixability of the dye was evaluated by changing the immersion time when the hair bundle was immersed in the pretreatment agent No. 8 described above. The results are shown in Table 5 below. The evaluation method at this time is as described in the first embodiment.
To 5, the same as the method of Reference Example 1.

[0037]

[Table 5]

As is apparent from the results, Example 12
Comparison between b * value of Example 1 and Example 13 shows that
It can be seen that the b * value of No. 2 is small and the bluish color of the ash that is easily discolored remains. Thus, it is understood that the fixing property of the dye can be improved by increasing the immersion time.

(Examples 14 to 18, Reference Examples 4 to 6) A pretreatment agent having a pH of 8 was prepared, and the fixability, damage prevention effect, and discoloration of the dye were evaluated. The results are shown in Table 6 below. The evaluation method at this time is as follows.

(Dye fixability) Examples 1 to 5, Reference Example 1
The same way.

(Effect of Damage Prevention: Sensory Evaluation) Five expert panelists evaluated the "feeling feeling" of the hair bundles treated in the same manner as in Examples 1 to 5 and Reference Example 1 in 5 cases.
The sensory evaluation was performed on a scale of 1 to 5 in terms of points and bad cases, the average of the scores was obtained, and evaluated according to the following criteria. ：: 4 points or more ○: 3 points or more and less than 4 points Δ: 2 points or more and less than 3 points ×: 1 point or more and less than 2 points

(Discoloration) As for "discoloration" of hair bundles treated in the same manner as in Examples 1 to 5 and Reference Example 1 by 10 expert panelists, 5 points without discoloration and 1 point with severe discoloration It was visually evaluated in five stages, and the average of the scores was obtained and evaluated according to the following criteria. ：: 4 points or more ○: 3 points or more and less than 4 points Δ: 2 points or more and less than 3 points ×: 1 point or more and less than 2 points

[0043]

[Table 6]

As is apparent from the results, Examples 14 to 18 using the pretreatment agent of the present invention are excellent in the fixing property of the dye, the effect of preventing damage, and the discoloration is small. On the other hand, in Reference Examples 4 and 5 deviating from the present invention and Reference Example 6 in which the pretreatment agent of the present invention was not used, all items could not be satisfied. In Reference Example 5, although the b * value was small and the dyeing properties seemed to be excellent, the color was discolored in the darker direction and the oxidized hair dye was set. Is different from that of the color, and is not a preferable result.

(Examples 19 to 23, Reference Example 7)
A pretreatment agent was prepared with the composition shown in Table 1. The amount of each component in the table is% by mass.

[0046]

[Table 7]

The pretreatment agent was treated as described below, and the tensile strength was measured to evaluate the effect of preventing damage.
The result is shown in FIG.

(Effect of Damage Prevention: Measurement of Tensile Strength) (1) Treatment Method The hair bundle was treated three times with a high bleach (a high bleach agent: manufactured by Nakano Pharmaceutical Co., Ltd.) to prepare damaged hair. The high bleached hair was immersed in each pretreatment agent for 10 seconds, pulled up, and left until the solution did not drip. After wrapping in a wrap at 40 ° C. for 10 minutes and heating, it was dried with a dryer. The hair bundle treated with the pretreatment agent is dyed with an oxidative hair dye (Ash: manufactured by Nakano Pharmaceutical),
After washing with a triethanolamine aqueous solution of lauryl sulfate, it was dried with a dryer. (2) Measurement of tensile strength Each hair bundle was left in a constant temperature and humidity chamber (20 ° C., 60% RH) for 24 hours or more, and then pulled in pure water using Tensilon UTM-11-20 (manufactured by Orientec). The strength was measured.

As is apparent from the results, Examples 19 to 23 using the pretreatment agent of the present invention have an effect of preventing the oxidative hair dye from lowering the tensile strength. On the other hand, in Reference Example 7 in which the pretreatment agent of the present invention was not used, it was found that the tensile strength was significantly reduced by the oxidative hair dye.

(Examples 24 to 27, Reference Example 8) Table 8 below
Was prepared with the composition shown in Table 1. The amount of each component in the table is% by mass.

[0051]

[Table 8]

In Table 7 above, No. Eleven pre-treatment agents and the above-mentioned post-treatment agents were treated as described below to evaluate the applicability to hair, the lack of stiffness after hair color treatment, the impartation of a moist feeling, and the shampooing resistance. The results are shown in Table 9 below.

(Applicability to Hair) The hair was coated with a pretreatment agent, dried with a drier, and dyed with an oxidative hair dye (Ash: manufactured by Nakano Pharmaceutical). Afterwards, the "applicability to hair" when applying the post-treatment agent was sensory-evaluated by 10 expert panelists on a 5-point scale with 5 points for good cases and 1 point for bad cases, and the average value of the scores was obtained. Was evaluated according to the following criteria. ：: 4 points or more ○: 3 points or more and less than 4 points Δ: 2 points or more and less than 3 points ×: 1 point or more and less than 2 points

(Lack of stiffness after hair coloring) A pretreatment agent was applied to the hair, dried with a drier, and dyed with an oxidative hair dye (Ash: manufactured by Nakano Pharmaceutical). After that, apply a post-treatment agent, leave it at 40 ° C for 5 minutes, wash it off, dry it with a drier, and give 10 good panelists about “no stiffness after hair color treatment”.
The sensory evaluation was performed on a scale of 1 to 5 in terms of points and bad cases, the average of the scores was obtained, and evaluated according to the following criteria. ：: 4 points or more ○: 3 points or more and less than 4 points Δ: 2 points or more and less than 3 points ×: 1 point or more and less than 2 points

(Providing a moist feeling) A pretreatment agent is applied to the hair, dried with a dryer, and then oxidized hair dye (ash:
(Manufactured by Nakano Pharmaceutical Co., Ltd.). After that, apply a post-treatment agent,
After leaving it at 40 ° C for 5 minutes, it was rinsed off, dried with a drier, and given 10 moist feelings by a panel of 10 expert panelists for “giving a moist feeling”. Was determined and evaluated according to the following criteria. ：: 4 points or more ○: 3 points or more and less than 4 points Δ: 2 points or more and less than 3 points ×: 1 point or more and less than 2 points

(Shampoo resistance) The hair was coated with a pretreatment agent, dried with a drier, and dyed with an oxidative hair dye (Ash: manufactured by Nakano Pharmaceutical). Thereafter, a post-treatment agent is applied, and 40
After leaving it at 5 ° C. for 5 minutes, it was washed off and dried with a dryer.
Next, shampoo three times and dry with a dryer,
"Shampoo resistance" was evaluated by a panel of 10 expert panelists in five stages, with 5 points for good cases and 1 point for bad cases, and the average of the scores was determined and evaluated according to the following criteria. ：: 4 points or more ○: 3 points or more and less than 4 points Δ: 2 points or more and less than 3 points ×: 1 point or more and less than 2 points

[0057]

[Table 9]

As is apparent from the results, Examples 24 to 30 which were treated with the pre-treatment agent of the present invention and then treated with the post-treatment agent of the present invention showed improved stiffness after hair coloring and improved shampoo resistance. It turns out that it is excellent. Examples 27 to 29 containing a plant-derived protein hydrolyzate and an egg white-derived protein hydrolyzate are examples in which a moist feeling is imparted and the plant-derived protein hydrolyzate contains a cationized product. 27 indicates that the applicability to hair is improved. In addition, since Example 30 was liquid, it was filled in a trigger and sprayed in the form of a mist. On the other hand, Reference Example 8 finished only with the pretreatment agent,
It can be seen that the feeling of roughness after hair coloring is not improved.

(Examples 31 and 32, Reference Example 9)
No. 11 and No. 11 in Table 8. 7 was treated as a pretreatment agent as described below, and the damage prevention effect was evaluated by measuring the tensile strength. The result is shown in FIG.

(Effect of Damage Prevention: Measurement of Tensile Strength) (1) Treatment Method The hair bundle is treated once with a high bleach (a high bleaching agent: manufactured by Nakano Pharmaceutical), and then once with a permanent (a thioperming agent: Nakano). Pharmaceutical) and damaged hair was prepared. Apply damaged hair to each treatment
After immersion for 0 seconds, it was pulled up and allowed to stand until the liquid did not drip. After wrapping in a wrap at 40 ° C. for 10 minutes and heating, it was dried with a dryer. The hair bundle treated with the treating agent was dyed with an oxidative hair dye (Ash: manufactured by Nakano Pharmaceutical), washed with an aqueous solution of triethanolamine lauryl sulfate, and dried with a dryer. In this test, the post-treatment agent No. 7 is used as a pretreatment agent. (2) Measurement of tensile strength Each hair bundle was left in a constant temperature and humidity chamber (20 ° C., 60% RH) for 24 hours or more, and then pulled in pure water using Tensilon UTM-11-20 (manufactured by Orientec). The strength was measured.

As is evident from the results, the pretreatment agent No. It can be seen that Example 31 using No. 11 has an effect of preventing a decrease in the tensile strength due to the oxidative hair dye. In addition, the post-treatment agent No. It can be seen that Example 32 in which No. 7 was used as a pretreatment had the same effect. This shows that the post-treatment agent of the present invention can also be used as a pre-treatment agent, and has an effect of preventing damage to hair in hair color treatment. On the other hand, in Reference Example 9 in which the pretreatment agent of the present invention was not used, it was found that the tensile strength was significantly reduced by the oxidative hair dye.

(Example 33, Reference Example 10)
o. Using the 11 pretreatment agents, treatment was performed as described below, and the fixability of the dye was evaluated. The results are shown in Table 10 below.
In Examples 1 to 32, the effects on oxidative hair dyes were evaluated. From this Example, the effects on acid hair dyes were evaluated.

(Dye fixability) (1) Treatment method The hair bundle was treated three times with a high bleach (a high bleaching agent: manufactured by Nakano Pharmaceutical Co., Ltd.) to prepare damaged hair. The high bleach hair was immersed in the pretreatment agent for 10 seconds, dehydrated, and then dried with a dryer.
The hair bundle treated with the pretreatment agent was dyed with an acidic hair dye (Blue: manufactured by Nakano Pharmaceutical), and the hair bundle was immersed in a 2% aqueous solution of triethanolamine lauryl sulfate at 50 ° C. for 30 minutes. (2) Colorimetry L *, a *, and b * of the hair bundle subjected to the above treatment are measured with a color difference meter, and the b * values are compared to determine the fixability of the dye of the acidic hair dye (blue). evaluated. The smaller the b * value, the stronger the bluish color and the better the fixability of the dye.

[0064]

[Table 10]

As is clear from the results, in Example 33 using the pretreatment agent of the present invention, the b * value was small, the bluish color of the acidic hair dye (blue) remained, and the fixing property of the dye was excellent. You can see that it is. On the other hand, in Reference Example 10 in which the pretreatment agent of the present invention was not used, the b * value was large,
It can be seen that the fixing of the dye is poor. Examples 1 to 32 show the effect on the oxidative hair dye, but it is understood from the present results that they are also effective on the acidic hair dye.

(Example 34, Reference Example 11)
o. Using the 11 pretreatment agents, treatment was performed as described below, and the fixability of the dye was evaluated. Table 11 shows the results.

(Dye fixability) (1) Treatment method The hair bundle was treated three times with a high bleach (a high bleaching agent: manufactured by Nakano Pharmaceutical Co., Ltd.) to prepare damaged hair. The high bleach hair was immersed in the pretreatment agent for 10 seconds, dehydrated, and then dried with a dryer.
The hair bundle treated with the pretreatment agent was dyed with an acidic hair dye (Red: manufactured by Nakano Pharmaceutical), and the hair bundle was immersed in a 2% aqueous solution of triethanolamine lauryl sulfate at 50 ° C. for 1 hour. (2) Colorimetry L *, a *, and b * of the hair bundle subjected to the above treatment are measured with a color difference meter, and the a * values are compared to determine the fixability of the dye of the acidic hair dye (red). evaluated. The larger the a * value, the stronger the redness, indicating that the dye has excellent fixability.

[0068]

[Table 11]

As is apparent from the results, Example 34 using the pretreatment agent of the present invention has a large a * value, the reddish color of the acidic hair dye (red) remains, and the dye has excellent fixability. You can see that it is. On the other hand, in Reference Example 11 in which the pretreatment agent of the present invention was not used, the a * value was small,
It can be seen that the fixing of the dye is poor.

(Example 35, Reference Example 12)
o. 11 and No. 11 in Table 8. The four post-treatment agents were treated as described below, and were evaluated for lack of stiffness and shampoo resistance after hair color treatment. Table 12 shows the results.

(Lack of stiffness after hair coloring) The hair was coated with a pretreatment agent, dried with a drier, and dyed with an acidic hair dye (Blue: manufactured by Nakano Pharmaceutical). After that, apply a post-treatment agent, leave it at 40 ° C for 5 minutes, wash it off, dry it with a drier, and give 10 good panelists about “no stiffness after hair color treatment”.
The sensory evaluation was performed on a scale of 1 to 5 in terms of points and bad cases, the average of the scores was obtained, and evaluated according to the following criteria. ：: 4 points or more ○: 3 points or more and less than 4 points Δ: 2 points or more and less than 3 points ×: 1 point or more and less than 2 points

(Shampoo resistance) The hair was coated with a pretreatment agent, dried with a drier, and dyed with an acidic hair dye (blue: manufactured by Nakano Pharmaceutical). After that, a post-treatment agent is applied,
For 5 minutes, rinsed, and dried with a dryer. Next, shampoo three times and dry with a drier. Sensory evaluation of "shampoo resistance" was carried out by 10 expert panelists on a 5-point scale with 5 points for good cases and 1 point for bad cases. And evaluated according to the following criteria. ：: 4 points or more ○: 3 points or more and less than 4 points Δ: 2 points or more and less than 3 points ×: 1 point or more and less than 2 points

[0073]

[Table 12]

As is evident from the results, Example 35 treated with the pre-treatment agent of the present invention and then treated with the post-treatment agent of the present invention has no stiffness after hair coloring and has excellent shampoo resistance. You can see that it is. On the other hand, Reference Example 12, which was finished only with the pretreatment agent, was slightly hard and had a poor feel.

[0075]

The present invention is configured as described above.
It is effective in preventing hair damage during hair color treatment, improving dye fixation, and improving the feeling of stiffness after hair color treatment, so that the touch after hair color treatment can be applied to severely damaged hair. It is possible to make good and beautiful colors last longer.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a graph showing a comparison between the effects of pretreatment agents in Examples 19 to 23 and Reference Example 7 for preventing damage.

FIG. 2 is a graph showing a comparison between the effects of pretreatment agents in Examples 31, 32 and Reference Example 9 for preventing damage.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinichi Tanaka 63-1 Minamiyamadacho, Kusatsu-shi, Shiga F-term in Nakano Pharmaceutical Co., Ltd. (reference) 4C083 AC072 AC122 AC302 AC542 AC641 AC642 AD092 AD152 AD411 AD412 AD441 AD442 AD571 AD572 CC31 CC33 EE07 EE26 EE29

Claims (10)

[Claims] 1. A pretreatment agent for a hair color used before a hair color treatment, characterized by containing a keratin hydrolyzate and / or a derivative thereof. 2. The pretreatment agent for a hair color according to claim 1, wherein the pH is in the range of 4 to 8. 3. The pretreatment agent for hair color according to claim 1, wherein the keratin hydrolyzate is α-keratose. 4. A hair treatment method, comprising applying a pre-treatment agent according to claim 1 to hair and then performing a hair coloring treatment. 5. A hair coloring treatment agent comprising a pre-treatment agent and a post-treatment agent used before and after the hair color treatment, wherein the pre-treatment agent contains a keratin hydrolyzate and / or a derivative thereof. Characteristic hair color treatment agent. 6. The hair coloring treatment agent according to claim 5, wherein the pH of the pretreatment agent is in the range of 4 to 8. 7. The hair coloring treatment agent according to claim 5, wherein the keratin hydrolyzate contained in the pretreatment agent is α-keratose. 8. The hair according to claim 5, wherein the post-treating agent contains at least one selected from the group consisting of ceramide, ceramide derivatives, phospholipids and phospholipid derivatives. Color treatment agent. 9. The post-treating agent is further selected from the group consisting of a plant-derived protein hydrolyzate, a plant-derived protein hydrolyzate, an egg white-derived protein hydrolyzate, and an egg white-derived protein hydrolyzate. The hair color treating agent according to claim 8, which contains one or more selected ones. 10. In treating hair with the hair color treatment agent according to any one of claims 5 to 9, after applying a pre-treatment agent to the hair, performing a hair color treatment, and then applying a post-treatment agent. A hair treatment method characterized by applying.