JP2021178806A - Post-treatment agent for hair dyeing and hair treatment method - Google Patents

Abstract

[Problem] To provide a hair dye post-treatment agent and hair treatment method that prevent damage to hair caused by treatment with an oxidative hair dye and suppress fading of dyed hair. [Solution] The hair dye post-treatment agent is a post-treatment agent used after treatment with an oxidative hair dye, contains levulinic acid having no counter ion, and has a pH in the range of 4.0 to 6.0. The hair treatment method includes the steps of: treating hair with an oxidative hair dye, applying a hair dye post-treatment agent containing levulinic acid having no counter ion to the oxidative hair dye while the oxidative hair dye remains, and blending the agent into the oxidative hair dye, and rinsing with hot water. [Selected Figure] None

Description

The present invention relates to preventing hair damage due to oxidative hair dye treatment and suppressing fading of dyed hair.

In a general oxidative hair dye, a first agent containing an oxidative dye and an alkaline agent and a second agent containing hydrogen peroxide are mixed immediately before use and treated on the hair to dye the hair. However, in the hair dye obtained in this way, the hair was damaged and the color was not sufficient.

There have been proposed post-treatment agents for hair dyeing and hair treatment methods that prevent hair damage due to treatment with an oxidative hair dye and suppress fading of dyed hair. For example, in Patent Document 1, in the first post-treatment step, the first post-treatment agent is applied to the hair that has been made wet by washing away the oxidative hair dye, and in the drying treatment step, the first post-treatment step is performed. The step of drying the hair after the first post-treatment step and the step of applying the second post-treatment agent to the hair after the drying treatment step in the second post-treatment step, the first step. The second post-treatment agent is at least one selected from cationized chitosan, an amphoteric tenside having an alkyl group having 18 or less carbon atoms, and a cationic surfactant having an alkyl group having 18 or less carbon atoms. A hair treatment method and a post-treatment agent kit containing an agent and having a composition in which the first post-treatment agent is higher than the mass ratio of cationized chitosan in the second post-treatment agent are disclosed. This method can prevent damage to the dyed hair, give the hair softness and good finger passage, and suppress the fading of the hair, but the hair damage preventing effect and the fading suppressing effect are not sufficient. ..

Further, Patent Document 2 contains (a) lactic acid, (b) disodium hydrogen phosphate and / or sodium citrate, and (c) catalase, respectively, and the pH of the solution is 4 to 5. After treating the hair with a post-treatment agent and an oxidative hair dye, immediately after washing the oxidative hair dye from the hair, apply the post-treatment agent for hair dye to the hair and shampoo the hair without washing it. A hair treatment method in which a post-treatment agent for hair dyeing is applied to hair, washed away, and then shampooed is disclosed. This method can prevent damage to the dyed hair, improve the condition of the hair after treatment, and improve the fixation of the dye on the hair, but the effect of preventing hair damage and the effect of suppressing fading are not sufficient. ..

Further, Patent Document 3 describes a two-agent hair treatment agent composition, wherein the first agent contains (A) cystine and (B) an alkaline agent, and the second agent is (C) organic. When the acid is contained and the total content of the first agent is 100% by mass, the content ratio of (A) cystine is 0.5 to 4% by mass, and the pH of the first agent is 8.5 to 11. The pH of the second agent is 3 to 5, and a method of applying the second agent after applying the first agent to the hair as a post-treatment agent for an oxidative hair dye is disclosed. In this method, when used on hair with different internal damages, the greater the degree of damage in the hair, the greater the degree of repair, equalizing the degree of internal damage and giving the hair a uniform feel. However, there is no description about the effect of suppressing fading, although it is possible to suppress uneven hair dyeing due to an oxidative hair dye and obtain excellent leveling property. In addition, it is necessary to apply the first agent, leave it for 30 minutes or less (especially within 20 minutes, further 10 minutes or less), allow it to fully penetrate, then apply the second agent in layers and wash it off. There is a problem that it takes time and effort.

Patent No. 5666788 Patent No. 5891029 Patent No. 6052863

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and is a hair dyeing post-treatment agent and a hair treatment method capable of preventing hair damage due to oxidative hair dye treatment and suppressing fading of dyed hair. The purpose is to provide.

As a result of diligent research to solve the above-mentioned problems, the present inventor is a post-treatment agent used after the oxidative hair dye treatment, and the post-treatment agent for hair dyeing is levulinic acid having no counterion. And the pH is in the range of 4.0 to 6.0. In addition, the hair treatment method is the step of treating the hair with an oxidative hair dye → A post-treatment agent for hair dyeing containing levulinic acid having no counterion with the oxidative hair dye remaining is applied to the oxidative hair dye. It is possible to prevent damage to the hair due to the oxidative hair dye treatment and suppress the fading of the dyed hair by the post-treatment agent for hair dye and the hair treatment method, which are characterized by the process of acclimating while blending → rinsing with hot water. The present invention was completed.

That is, the post-treatment agent for hair dyeing of the present invention is a post-treatment agent used after the treatment with an oxidative hair dye, and contains 0.01 to 1.0% by mass of levulinic acid having no counterion. Moreover, the pH is in the range of 4.0 to 6.0.

Further, the hair treatment method of the present invention is used.
(1) Step of treating hair with oxidative hair dye (2) Step of applying the post-treatment agent for hair dye to the oxidative hair dye with the oxidative hair dye remaining (3) Rinse with hot water It is characterized by being a process.

The post-treatment agent for hair dyeing and the hair treatment method of the present invention can prevent damage to the hair due to the treatment with an oxidative hair dye and suppress fading of the dyed hair.

<Post-treatment agent for hair dyeing>
The post-treatment agent for hair dyeing of the present invention essentially contains levulinic acid having no counterion. Hereinafter, the present invention will be described in detail.

The blending amount of levulinic acid having no counterion is 0.01 to 1.0% by mass, preferably 0.02 to 0.5% by mass, based on the total amount of the hair treatment agent of the present invention. If the blending amount is less than 0.01% by mass, damage to the hair cannot be sufficiently prevented and the effect of suppressing fading of dyed hair cannot be obtained, while if it exceeds 1.0% by mass, the finish feels good. Dyeing occurs.

The post-treatment agent for hair dyeing of the present invention needs to keep the pH in the range of 4.0 to 6.0, preferably in the range of 4.5 to 5.5. If the pH is less than 4.0, the texture of the finished product will be squeaky. When the pH exceeds 6.0, it is not possible to sufficiently prevent damage to the hair and obtain the effect of suppressing fading of the dyed hair. That is, it is necessary to be near the isoelectric point of the hair.
The base having no counterion for adjusting the pH of the post-treatment agent for hair dyeing to the above range is not particularly limited, but is not particularly limited, but is an inorganic base such as sodium hydroxide or potassium hydroxide, aqueous ammonia or a bird. Organic bases such as ethanolamine and basic amino acids can be used. Further, as the base having a counterion, an acid other than levulinic acid used for the base having a counterion needs to have an acid dissociation constant smaller than that of levulinic acid. As a result, levulinic acid can exert its effect without having a counterion. For example, a base having a counterion such as a sodium salt of a monocarboxylic acid such as glycolic acid, lactic acid or levulinic acid, a base having a counterion such as a sodium salt of a dicarboxylic acid such as maleic acid or malic acid, citric acid or the like. A base having a counterion such as a sodium salt of tricarboxylic acid, a base having a counterion such as a sodium salt of an acidic amino acid such as glutamic acid or aspartic acid, a sodium salt of an inorganic acid such as phosphoric acid or polyphosphoric acid, etc. A base having a counterion, a base having a counterion such as a sodium salt of an acid having a particularly chelating effect such as ethidronic acid, edetic acid, and phytic acid, and the like can be used. These can be used individually by 1 type or in combination of 2 or more types.

In addition to levulinic acid, other components usually used for cosmetics, quasi-drugs, and the like can be arbitrarily added to the post-treatment agent for hair dyeing as long as the effects of the present invention are not impaired. Such components include, for example, cationic polymers, anionic polymers, nonionic polymers, amphoteric polymers, polyhydric alcohols, saccharides, amino acids, peptides, proteins, metal ion blockers, oils, powder components, cationic surfactants. It can contain an active agent, an anionic surfactant, a nonionic surfactant, an amphoteric surfactant, a pH adjuster, a thickener, a powder component, a fragrance, a powder component, a pigment, water and the like.

The dosage form of the post-treatment agent for hair dyeing according to the present invention is not particularly limited as long as the desired effect is sufficiently exhibited, but is preferably liquid or milky. Further, if it can be made into a liquid or milky liquid by diluting it with water or hot water at the time of use, for example, a liquid, milky liquid, gel-like, cream-like dosage form can be taken.

<Hair treatment method>
The hair treatment method of the present invention is (1) a step of treating hair with an oxidative hair dye, and (2) blending while applying the post-treatment agent for hair dye to the oxidative hair dye with the oxidative hair dye remaining. Step (3) Including the step of rinsing with hot water.

(1) The step of treating the hair with the oxidative hair dye is not particularly limited, and the method of using the oxidative hair dye to be used is applied.

(2) As a step of applying the post-treatment agent for hair dyeing to the oxidative hair dye with the oxidative hair dye remaining, the oxidative hair dye is applied and after a predetermined time elapses, the oxidative hair dye is applied. Do not wash off the agent, or wash off the oxidative hair dye, and with the oxidative hair dye remaining, apply the oxidative hair dye with the post-treatment agent for hair dye so as to gradually dilute it, and then oxidize it. Apply a sufficient amount of the hair dye so that it is washed away with the hair dye post-treatment agent and let it blend in. The amount of the post-treatment agent for hair dyeing is determined by the amount of the oxidative hair dye applied and the amount of the oxidative hair dye remaining when the oxidative hair dye is washed away, and is an amount that can sufficiently carry out the step. If it is not particularly limited, it is preferably 200 mL to 3,000 mL.

(3) The step of rinsing with hot water is not particularly limited, and the process is sufficiently rinsed.

The present invention will be described in more detail below with reference to specific examples, but the present invention is not limited to the following examples. In addition, the blending amount in the following examples and the like indicates mass% unless otherwise specified.

(Examples 1 to 11 and Comparative Examples 1 to 4)
A hair dyeing post-treatment agent having the composition shown in Table 1 below was prepared by stirring and mixing each component in purified water until the components became uniform.
The effect of preventing damage to the hair treated with the post-treatment agent for hair dyeing by the following hair treatment method and the effect of suppressing fading of the dyed hair were evaluated according to the following evaluation criteria.

<Hair damage prevention effect>
Human hair (Chinese) was cut to a length of 15 cm to create a hair bundle weighing 3 g. Then, each hair bundle is washed with a commercially available shampoo, thoroughly towel-dried, then 5 g of a commercially available 8-level ash-based oxidative hair dye is applied, left at 25 ° C for 40 minutes, and post-treated for hair dyeing. Apply 30 mL of the agent and let it blend in. Then, it was thoroughly rinsed with hot water and washed with a commercially available shampoo. Then, it was immersed in a 2% sodium polyoxyethylene lauryl sulfate aqueous solution at 60 ° C. for 1 hour, rinsed thoroughly with hot water, and then left at room temperature for 24 hours in a sufficiently towel-dried hanging state. It was evaluated according to the evaluation criteria of. For the evaluation, human hair (Chinese) was cut to a length of 15 cm to make a hair bundle weighing 3 g, and then the hair bundle was washed with a commercially available shampoo and sufficiently towel-dried and hung. It was left at room temperature for 24 hours in this state and compared with a sufficiently dried hair bundle. All evaluations were carried out by three people with more than 10 years of experience as a beautician.

<Evaluation criteria for feel>
The better the feel, the less damage the hair has.
1. 1. Feeling dry and squeaky 2. I feel a little dry and a little squeaky. 3. It feels almost the same, and you don't feel any dryness or creaking. It has the same feel and does not feel dry or squeaky. Smooth feel with no dryness or creaking <Glossy evaluation criteria>
The better the gloss, the less damage the hair has.
1. 1. Poor luster 2. The gloss is a little bad 3. Almost the same gloss 4. Equivalent luster 5. Slightly glossy

<Hair fading suppression effect>
Human hair (Chinese) was cut to a length of 15 cm to create a hair bundle weighing 3 g. Then, each hair bundle is washed with a commercially available shampoo, thoroughly towel-dried, then 5 g of a commercially available 8-level ash-based oxidative hair dye is applied, left at 25 ° C for 40 minutes, and post-treated for hair dyeing. Apply 30 mL of the agent and let it blend in. Then, it was thoroughly rinsed with hot water and washed with a commercially available shampoo. Then, it was immersed in hot water at 60 ° C. for 10 minutes, rinsed thoroughly with hot water, and then left at room temperature for 24 hours in a state of being sufficiently towel-dried and hung, and evaluated according to the following evaluation criteria. For evaluation, human hair (Chinese) is cut to a length of 15 cm to make a hair bundle weighing 3 g, then the hair bundle is washed with a commercially available shampoo, thoroughly towel-dried, and then marketed. Apply 5g of 8 level ash-based oxidative hair dye, leave at 25 ° C for 40 minutes, rinse thoroughly with hot water, wash with a commercially available shampoo, and then hang it on a towel dry for 24 hours. It was compared with a hair bundle that had been left at room temperature and dried sufficiently. The evaluation was carried out by three people with more than 10 years of experience as a beautician.

<Evaluation criteria for fading>
1. 1. The colors are different.
2. 2. There is a difference in color, and I feel the difference.
3. 3. There is a slight difference in color, but there is no problem in actual use.
4. There is only a slight difference in color, but there is no problem in actual use.
5. There is almost no difference in color.

As shown in Examples 1 to 11, when a hair dyeing post-treatment agent containing 0.01 to 1.0% by mass of levulinic acid having no counterion is used, a sufficient damage prevention effect and fading suppressing effect are used. was gotten. On the other hand, as shown in Comparative Examples 1 to 4, when the content of levulinic acid having no counterion was not in the above range, the damage preventing effect and / or the fading suppressing effect was insufficient.

(Examples 12 to 19 and Comparative Examples 5 to 12)
A post-treatment agent for hair dyeing having the compositions shown in Table 2 below was prepared by stirring and mixing each component in purified water until the components became uniform.
The effect of preventing damage to the hair treated with the post-treatment agent for hair dyeing by the above-mentioned hair treatment method and the effect of suppressing fading of the dyed hair were evaluated according to the above-mentioned evaluation criteria.

As shown in Examples 12 to 19, when a post-treatment agent for hair dyeing having a pH in the range of 4.0 to 6.0 was used, a sufficient damage prevention effect and a fading suppressing effect were obtained. On the other hand, as shown in Comparative Examples 5 to 12, when the pH was not in the above range, the damage preventing effect and / or the fading suppressing effect was insufficient.

(Example 20 and Comparative Examples 13 to 14)
The damage prevention effect of the hair treated by the following hair treatment method and the fading suppressing effect of the dyed hair were evaluated according to the above evaluation criteria.

(Comparative Example 13)
<Hair damage prevention effect>
Human hair (Chinese) was cut to a length of 15 cm to create a hair bundle weighing 3 g. Then, wash each hair bundle with a commercially available shampoo, thoroughly towel dry, apply 5 g of a commercially available 8-level ash-based oxidative hair dye, leave at 25 ° C for 40 minutes, and rinse thoroughly with hot water. , 30 mL of the post-treatment agent for hair dyeing of Example 3 was applied, and the hair was washed with a commercially available shampoo. Then, it was immersed in a 2% aqueous solution of sodium polyoxyethylene lauryl sulfate at 60 ° C. for 1 hour, rinsed thoroughly with hot water, and then left at room temperature for 24 hours in a sufficiently towel-dried state to be sufficiently dried. It was evaluated according to the evaluation criteria of. For the evaluation, human hair (Chinese) was cut to a length of 15 cm to make a hair bundle weighing 3 g, and then the hair bundle was washed with a commercially available shampoo and sufficiently towel-dried and hung. It was left at room temperature for 24 hours in this state and compared with a sufficiently dried hair bundle. All evaluations were carried out by three people with more than 10 years of experience as a beautician.
<Hair fading suppression effect>
Human hair (Chinese) was cut to a length of 15 cm to create a hair bundle weighing 3 g. Then, wash each hair bundle with a commercially available shampoo, thoroughly towel dry, apply 5 g of a commercially available 8-level ash-based oxidative hair dye, leave at 25 ° C for 40 minutes, and rinse thoroughly with hot water. , 30 mL of the post-treatment agent for hair dyeing of Example 3 was applied and washed with a commercially available shampoo. Then, it was immersed in hot water at 60 ° C. for 10 minutes, rinsed thoroughly with hot water, and then left at room temperature for 24 hours in a state of being sufficiently towel-dried and hung, and evaluated according to the above evaluation criteria. For evaluation, human hair (Chinese) is cut to a length of 15 cm to make a hair bundle weighing 3 g, then the hair bundle is washed with a commercially available shampoo, thoroughly towel-dried, and then marketed. Apply 5g of 8 level ash-based oxidative hair dye, leave at 25 ° C for 40 minutes, rinse thoroughly with hot water, wash with a commercially available shampoo, and then hang it on a towel dry for 24 hours. It was compared with a hair bundle that had been left at room temperature and dried sufficiently. The evaluation was carried out by three people with more than 10 years of experience as a beautician.

(Comparative Example 14)
<Hair damage prevention effect>
Human hair (Chinese) was cut to a length of 15 cm to create a hair bundle weighing 3 g. Then, each hair bundle is washed with a commercially available shampoo, thoroughly towel-dried, then 5 g of a commercially available 8-level ash-based oxidative hair dye is applied, and the hair bundle is left at 25 ° C. for 40 minutes to remove the oxidative hair dye. Apply 5 mL of the post-treatment agent for hair dyeing of Example 3, which is an insufficient amount with respect to the amount, and let it blend in. Then, it was thoroughly rinsed with hot water and washed with a commercially available shampoo. Then, it was immersed in a 2% aqueous solution of sodium polyoxyethylene lauryl sulfate at 60 ° C. for 1 hour, rinsed thoroughly with hot water, and then left at room temperature for 24 hours in a sufficiently towel-dried state to be sufficiently dried. It was evaluated according to the evaluation criteria of. For the evaluation, human hair (Chinese) was cut to a length of 15 cm to make a hair bundle weighing 3 g, and then the hair bundle was washed with a commercially available shampoo and sufficiently towel-dried and hung. It was left at room temperature for 24 hours in this state and compared with a sufficiently dried hair bundle. All evaluations were carried out by three people with more than 10 years of experience as a beautician.
<Hair fading suppression effect>
Human hair (Chinese) was cut to a length of 15 cm to create a hair bundle weighing 3 g. Then, each hair bundle is washed with a commercially available shampoo, thoroughly towel-dried, then 5 g of a commercially available 8-level ash-based oxidative hair dye is applied, and the hair bundle is left at 25 ° C. for 40 minutes to remove the oxidative hair dye. Apply 5 mL of the post-treatment agent for hair dyeing of Example 3, which is an insufficient amount with respect to the amount, and let it blend in. Then, it was thoroughly rinsed with hot water and washed with a commercially available shampoo. Then, it was immersed in hot water at 60 ° C. for 10 minutes, rinsed thoroughly with hot water, and then left at room temperature for 24 hours in a state of being sufficiently towel-dried and hung, and evaluated according to the above evaluation criteria. For evaluation, human hair (Chinese) is cut to a length of 15 cm to make a hair bundle weighing 3 g, then the hair bundle is washed with a commercially available shampoo, thoroughly towel-dried, and then marketed. Apply 5g of 8 level ash-based oxidative hair dye, leave at 25 ° C for 40 minutes, rinse thoroughly with hot water, wash with a commercially available shampoo, and then hang it on a towel dry for 24 hours. It was compared with a hair bundle that had been left at room temperature and dried sufficiently. The evaluation was carried out by three people with more than 10 years of experience as a beautician.

<Hair damage prevention effect>
Human hair (Chinese) was cut to a length of 15 cm to create a hair bundle weighing 3 g. Then, wash each hair bundle with a commercially available shampoo, dry it thoroughly with a towel, apply 5 g of a commercially available 8-level ash-based oxidative hair dye, leave it at 25 ° C for 40 minutes, and apply 10 mL of hot water. , Apply 20 mL of the post-treatment agent for hair dyeing of Example 3 and let it blend in. Then, it was thoroughly rinsed with hot water and washed with a commercially available shampoo. Then, it was immersed in a 2% aqueous solution of sodium polyoxyethylene lauryl sulfate at 60 ° C. for 1 hour, rinsed thoroughly with hot water, and then left at room temperature for 24 hours in a sufficiently towel-dried state to be sufficiently dried. It was evaluated according to the evaluation criteria of. For the evaluation, human hair (Chinese) was cut to a length of 15 cm to make a hair bundle weighing 3 g, and then the hair bundle was washed with a commercially available shampoo and sufficiently towel-dried and hung. It was left at room temperature for 24 hours in this state and compared with a sufficiently dried hair bundle. All evaluations were carried out by three people with more than 10 years of experience as a beautician.
<Hair fading suppression effect>
Human hair (Chinese) was cut to a length of 15 cm to create a hair bundle weighing 3 g. Then, wash each hair bundle with a commercially available shampoo, dry it thoroughly with a towel, apply 5 g of a commercially available 8-level ash-based oxidative hair dye, leave it at 25 ° C for 40 minutes, and apply 10 mL of hot water. , Apply 20 mL of the post-treatment agent for hair dyeing of Example 3 and let it blend in. Then, it was thoroughly rinsed with hot water and washed with a commercially available shampoo. Then, it was immersed in hot water at 60 ° C. for 10 minutes, rinsed thoroughly with hot water, and then left at room temperature for 24 hours in a state of being sufficiently towel-dried and hung, and evaluated according to the above evaluation criteria. For evaluation, human hair (Chinese) is cut to a length of 15 cm to make a hair bundle weighing 3 g, then the hair bundle is washed with a commercially available shampoo, thoroughly towel-dried, and then marketed. Apply 5g of 8 level ash-based oxidative hair dye, leave at 25 ° C for 40 minutes, rinse thoroughly with hot water, wash with a commercially available shampoo, and then hang it on a towel dry for 24 hours. It was compared with a hair bundle that had been left at room temperature and dried sufficiently. The evaluation was carried out by three people with more than 10 years of experience as a beautician.

As shown in Example 20, when the hair treatment method is a step of applying the post-treatment agent for hair dyeing to the oxidative hair dyeing agent while the oxidative hair dyeing agent remains, the hair treatment method is sufficiently prevented from being damaged. The effect and the effect of suppressing fading were obtained. On the other hand, as shown in Comparative Examples 13 to 14, the hair treatment method is a range of steps in which the post-treatment agent for hair dyeing is applied to the oxidative hair dye while the oxidative hair dye remains. If not, the damage prevention effect and the fading suppressing effect were insufficient.

Claims (2)

A post-treatment agent used after oxidative hair dye treatment.
A post-treatment agent for hair dyeing, which contains 0.01 to 1.0% by mass of levulinic acid having no counterion and has a pH in the range of 4.0 to 6.0. (1) Step of treating hair with oxidative hair dye (2) Step of applying the post-treatment agent for hair dye according to claim 1 to the oxidative hair dye with the oxidative hair dye remaining (2) 3) A hair treatment method characterized by being a process of rinsing with hot water.