JP6487677B2 - Hair washing cosmetic and hair treatment method - Google Patents

Description

  The present invention effectively removes the colorant remaining on the hair after the hair color treatment, and can prevent hair fading immediately after the hair color treatment, and such hair washing cosmetics. The present invention relates to a hair treatment method for effectively washing hair with a cosmetic.

  In recent years, many people regardless of age have undergone hair coloring. After performing the hair color treatment, it is common to perform a washing process 2 to 3 times in order to remove the color agent remaining on the hair. For these reasons, hair after hair color treatment (hereinafter, such hair may be referred to as “hair color hair”) is susceptible to physical damage.

  In addition, hair is physically and chemically damaged by hair coloring. Such damaged hair has a problem that, when washed with a shampoo after hair color treatment, lack of foaming and fading of the hair color hair due to washing tend to occur. In addition, there is a problem that the hair is entangled and the hair is stiff due to damage of the hair, and the operability in the hair washing process is deteriorated.

  In order to suppress the lack of foaming when washing with shampoo, it is also conceivable to use a surfactant having excellent detergency. However, the use of a surfactant excellent in detergency may promote fading of hair color hair. On the other hand, in order to suppress the fading of hair color hair, it is also conceivable to suppress the cleaning power. However, the method of suppressing the detergency cannot effectively remove the colorant remaining on the hair.

  In order to suppress entanglement between hairs and hair stiffness during shampoo treatment, it is also conceivable to add a high conditioning component to the shampoo. However, adding a high conditioning ingredient may impair the effect of the hair treatment after shampooing.

  In order to solve the above problems, for example, Patent Document 1 discloses a novel betaine surfactant that exhibits high surface activity even in a wider pH range and is excellent in low-temperature stability and compatibility with other surfactants. Has been proposed. In this technique, by using a cleaning composition containing a predetermined amount of N- (2-hydroxyalkyl) -N-alkylaminocarboxylic acid, which is a novel betaine-type surfactant, hair dyeing with an oxidative hair dye or the like. It has been disclosed that when it is used for washing washed hair, it exhibits an excellent feeling of use and an appropriate washing property, can condition the hair, and can improve color durability.

  The cleaning composition as described above is good in terms of the effect of preventing color fading of hair color hair. However, entanglement between hairs during shampooing and rinsing and hair squeak are not considered, and it is difficult to say that good results are obtained. In order to improve operability, an oil component or the like is also added, but there may be a problem in terms of storage stability and foaming of the composition. There has been a demand for the development of a hair washing cosmetic that is more effective in removing a colorant and preventing hair color from fading without causing these problems.

JP 2006-22085 A

  The present invention has been made under such circumstances. The purpose of the present invention is to effectively remove the colorant remaining on the hair after the hair color treatment, and the hair immediately after the hair color treatment. It is an object of the present invention to provide a hair-cleaning cosmetic that can prevent fading, and a hair treatment method that effectively cleanses hair using such a hair-cleaning cosmetic.

The hair treatment method of the present invention that has achieved the above object is as follows:
(A) As an amphoteric surfactant, it contains (A1) hydroxyalkylhydroxyethyl sarcosine, (A2) coconut oil fatty acid amidopropyl betaine, (A3) lauric acid amidopropyl betaine, (A4) 2-alkyl-N- The hair is washed with a first agent containing at least one selected from the group consisting of carboxymethyl-N-hydroxyethylimidazolinium betaine and (A5) alkylhydroxysulfobetaine and (B) an alkylglucoside. Process,
The gist is that the step of washing the hair using the second agent containing at least (C) polymethacryloylethyldimethylbetaine is performed in the order described above.

On the other hand, the hair-cleaning cosmetic of the present invention that has achieved the above object
(A) As an amphoteric surfactant, it contains (A1) hydroxyalkylhydroxyethyl sarcosine, (A2) coconut oil fatty acid amidopropyl betaine, (A3) lauric acid amidopropyl betaine, (A4) 2-alkyl-N- A first agent containing at least one selected from the group consisting of carboxymethyl-N-hydroxyethylimidazolinium betaine and (A5) alkylhydroxysulfobetaine, and (B) an alkylglucoside;
It has a gist in that it comprises a second agent containing at least (C) polymethacryloylethyldimethylbetaine.

  In the cosmetic for washing hair of the present invention, the first agent may further contain (D) polyoxyethylene phytosterol.

  The proportion of the (A1) hydroxyalkylhydroxyethyl sarcosine in the entire first agent is 30% by mass or less (excluding 0% by mass), and the proportion of the (B) alkyl glucoside in the entire first agent is 20% by mass. % Or less (excluding 0% by mass) and the proportion of the (C) polymethacryloylethyldimethylbetaine in the entire second agent is preferably 20% by mass or less (not including 0% by mass).

  According to the present invention, (A) as an amphoteric surfactant, it contains (A1) hydroxyalkylhydroxyethyl sarcosine, (A2) coconut oil fatty acid amidopropyl betaine, (A3) lauric acid amidopropyl betaine, (A4) A first agent containing at least one selected from the group consisting of 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine and (A5) alkylhydroxysulfobetaine and (B) an alkylglucoside And a step of washing the hair using the second agent containing at least (C) polymethacryloylethyldimethylbetaine in accordance with the order described above, to the hair color hair, The remaining color agent can be effectively removed and the hair color The fading of the hair can be prevented.

  This inventor examined from various angles in order to implement | achieve the cosmetics for hair washing suitable for the said objective. As a result, (A) the amphoteric surfactant contains (A1) hydroxyalkylhydroxyethyl sarcosine, (A2) coconut oil fatty acid amidopropyl betaine, (A3) lauric acid amidopropyl betaine, (A4) 2-alkyl -At least one selected from the group consisting of -N-carboxymethyl-N-hydroxyethylimidazolinium betaine and (A5) alkylhydroxysulfobetaine, and (B) a first agent containing an alkyl glucoside, (C) If it is cosmetics for hair washing which consists of the 2nd agent containing polymethacryloyl ethyl dimethyl betaine, the process of washing hair with the said 1st agent and the process of washing hair with the 2nd agent will be followed in order of this description. Hair washing cosmetics and hair treatment method suitable for the above purpose It found that can be achieved, and completed the present invention.

  (A1) hydroxyalkylhydroxyethyl sarcosine, (A2) coconut oil fatty acid amidopropyl betaine, (A3) lauric acid amidopropyl betaine, (A4) 2-alkyl-N, contained in the first agent of the hair washing cosmetic -Carboxymethyl-N-hydroxyethylimidazolinium betaine and (A5) alkylhydroxysulfobetaine are amphoteric surfactants and are detergents used when washing hair.

  Among these components, (A1) hydroxyalkylhydroxyethyl sarcosine (hereinafter sometimes referred to as “(A1) component”) is an effective component for removing the colorant and suppressing fading. This component (A1) is an amino acid type amphoteric surfactant, and there is hydroxyalkyl (C12-14) hydroxyethyl sarcosine in which the alkyl group mainly represents C12 to C14, which is expressed as “HYDROXYALKYL HYROXYETTHYL SARCOSINE” There is. Specifically, for example, Kawaken Fine Chemicals Co., Ltd. (hereinafter, “trade name”): “SOFTAZOLINE LMEB”, “SOFTAZOLINE LMEB-R” and the like can be mentioned.

  (A2) Palm oil fatty acid amidopropyl betaine (hereinafter sometimes referred to as “component (A2)”) is an effective component for removing the colorant. This component (A2) is an amphoteric surfactant made of coconut oil fatty acid amidopropyldimethylaminoacetic acid. This (A2) coconut oil fatty acid amidopropyl betaine may be naturally derived or synthesized, but in the synthesized one, the fatty acid alkyl chain length is preferably C10 to C16. Specifically, for example, “Marpovister CAP-Y” (trade name: manufactured by Matsumoto Yushi Seiyaku Co., Ltd.), “Rebon 2000” (trade name: manufactured by Sanyo Chemical Industries, Ltd.) and the like can be mentioned.

  (A3) Amidopropyl betaine laurate (hereinafter sometimes referred to as “(A3) component”) is an effective component for removing the colorant. This component (A3) is an amidopropyl betaine-type amphoteric surfactant and may be expressed as lauramidopropyl betaine. Specifically, for example, “Levon 2000L” (trade name: manufactured by Sanyo Chemical Industries), “Amphitor 20AB” (trade name: manufactured by Kao Corporation), “Softazoline LPB” (trade name: manufactured by Kawaken Fine Chemical Co., Ltd.), etc. Can be mentioned.

  (A4) 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine (hereinafter sometimes referred to as “(A4) component”) is an effective component for removing the colorant. This component (A4) is an imidazoline-type amphoteric surfactant, and may be expressed as “Nacococoamphoacetate” or “SODIUM COCOAMPHOACESET”. Specifically, for example, “Levon CIB” (trade name: manufactured by Sanyo Kasei Kogyo Co., Ltd.), Kawaken Fine Chemicals Co., Ltd. (hereinafter referred to as “trade name”): “SOFTAZOLINE CH”, “SOFTAZOLINE CH-R”, “SOFTAZOLINE CL” , “Softazoline CL-R” and the like.

  (A5) Alkylhydroxysulfobetaine (hereinafter sometimes referred to as “component (A5)”) is an effective component for removing the colorant. This component (A5) is a betaine-type amphoteric surfactant, such as lauryl hydroxysulfobetaine, and may be expressed as “lauramidopropylhydroxysultain” or “LAURAMIDOPROPYL HYROXYSULTINE”. Specifically, for example, “Amphitor 20HD” (trade name: manufactured by Kao Corporation), Kawaken Fine Chemical Co., Ltd. (hereinafter referred to as “trade name”): “softazoline LSB”, “softazoline LSB-R” and the like can be mentioned.

  The content of the component (A1) is preferably 0.1% by mass or more in terms of the ratio to the entire first agent in order to exert the effect of removing the color agent and the effect of suppressing fading. More preferably, it is 0.5 mass% or more. The upper limit of the content of the component (A1) is preferably 30% by mass or less as a percentage of the entire first agent. More preferably, it is 20 mass% or less. When the content of the component (A1) exceeds 30% by mass, the effect is saturated.

  The (A) amphoteric surfactant other than the (A1) component used in the hair washing cosmetic of the present invention includes the above (A2) component to (A5) component, which are used alone or in combination of two or more. Can be used. The total content of the components (A2) to (A5) is preferably 0.1% by mass or more in terms of the ratio to the entire first agent in order to exert the effect of removing the color agent. More preferably, it is 0.5 mass% or more. The upper limit of the total content of the components (A2) to (A5) is preferably 60% by mass or less in terms of the ratio to the entire first agent. More preferably, it is 40 mass% or less, More preferably, it is 20 mass% or less. When the total content of the components (A2) to (A5) exceeds 60% by mass, fading of hair color hair may occur. Among the components (A2) to (A5), the component (A2) is particularly preferable from the viewpoint of effects.

  In the 1st agent of the cosmetics for hair washing of this invention, it is necessary to use together the said (A1) component and at least any one of said (A2) component-(A5) component as (A) amphoteric surfactant. . This is because the above-described component (A1) is used alone or at least any one of the components (A2) to (A5) is used alone, and the effect of removing the color agent and the hair color hair are better when used in combination. This is because an excellent effect is exhibited in that the degree of fading is small.

  The first agent of the hair cleansing cosmetic composition of the present invention also contains (B) alkyl glucoside (hereinafter sometimes referred to as “component (B)”), but this component removes foaming and colorant. It is an effective ingredient. This component (B) is a nonionic surfactant in which an alkyl group and a sugar are bonded by a glucoside bond. The alkyl chain length is not particularly limited, but is preferably C8 to C16 from the viewpoint of foaming and the effect of removing the colorant. It is expressed as alkyl (8-16) glucoside or decyl glucoside. Specifically, for example, “PLANTACARE 2000 UP” (trade name: manufactured by Cognis Japan Co., Ltd.) can be mentioned.

  It is preferable that content of (B) component is 0.5 mass% or more in the ratio for the whole 1st agent. When the content of the component (B) is less than 0.5% by mass, the foaming and color agent removal effects are lowered, and the hair tends to be prevented from being washed. From such a viewpoint, the alkyl glucoside content is preferably 0.5% by mass or more. More preferably, it is 1 mass% or more. In addition, the upper limit of the content of the component (B) is preferably 20% by mass or less in terms of the ratio to the entire first agent from the viewpoint that the effect is saturated and the viscosity is increased to deteriorate the operability. More preferably, it is 10 mass% or less.

  It is also effective to further contain (D) polyoxyethylene phytosterol (hereinafter sometimes referred to as “component (D)”) in the first agent of the hair washing cosmetic of the present invention, if necessary. (D) component is an effective component in suppressing the tangle of the hair at the time of hair washing. This component (D) is a nonionic surfactant obtained by addition polymerization of ethylene oxide to a hydrogenated product of cholesterol. The number of moles of addition of ethylene oxide to be subjected to addition polymerization is not particularly limited, but is preferably 5 to 30 moles, more preferably 20 to 30 moles, particularly 30 moles from the viewpoint of water solubility and hair washability. It is. Specific examples of the polyoxyethylene phytosterol include “NIKKOL BPS-30” (trade name: manufactured by Nikko Chemicals).

  The content of the component (D) is preferably 0.05% by mass or more in terms of the total proportion of the first agent in order to exhibit the effect of difficulty in tangling the hair during shampooing. More preferably, it is 0.2 mass% or more. Moreover, it is preferable that content of (D) component is 2 mass% or less in the ratio for the whole 1st agent. More preferably, it is 0.8 mass% or less. When content of (D) component exceeds 2 mass%, there exists a possibility that storage stability and foaming may fall.

  On the other hand, the second agent of the hair cleansing cosmetic composition of the present invention contains at least (C) polymethacryloylethyldimethylbetaine (hereinafter sometimes referred to as “component (C)”). The component (C) is effective for adjusting the amount of foam at the time of washing the hair, maintaining foam retention, and reducing squeaking in the hair at the time of rinsing. This component (C) is a polymer compound that exhibits amphotericity when dissolved in water. Specifically, for example, “Plus size L-410W”, “Plus size L-401”, “Plus size L-402W”, etc. manufactured by Kyoyo Chemical Industry Co., Ltd. (hereinafter, “trade name”) can be mentioned.

  The content of the component (C) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, as a proportion of the entire second agent. When the content of the component (C) decreases, the amount of foam at the time of washing the hair decreases, and the foam retention tends to decrease or the hair at the time of rinsing tends to squeak.

  When the content of the component (C) increases, the viscosity increases and the operability tends to deteriorate. From such a viewpoint, the content of the component (C) is preferably 20% by mass or less as a proportion of the entire second agent. More preferably, it is 15 mass% or less.

  In the hair treatment method of the present invention, the hair is treated by performing the step of treating the hair with the first agent and the step of treating the hair with the second agent according to the order described above. When performing such treatment, after treating the hair with the first agent, the hair is treated with the second agent without any treatment (ie, continuously) except for washing with water if necessary. It is preferable to process.

  As such a treatment procedure, for example, the hair after the color treatment is sufficiently washed with warm water or room temperature water (hereinafter referred to as “warm water”), and then an appropriate amount of the first agent is taken by hand to the entire hair. After squeezing and foaming, rinse thoroughly with warm water or the like, and take the appropriate amount of the second agent and squeeze it over the entire hair. After foaming, rinse thoroughly with warm water or the like. Also, after thoroughly washing the hair after color treatment with warm water, etc., take the first agent in an appropriate amount by hand and spread it over the entire hair, and after lathering, take the second agent in an appropriate amount by hand and spread it throughout the hair. After foaming, it may be sufficiently rinsed with warm water or the like. However, before treating the hair with the first agent, after treating the hair with the first agent and before treating with the second agent, or after treating with the second agent, the effect of the present invention is affected. In the range not given, it is also possible to perform treatment with an intermediate treatment agent together with or in place of washing with warm water or the like.

  The cosmetic for washing hair of the present invention comprises the above-mentioned (A) component and (B) component, a first agent containing (D) component as required, and a second agent containing at least (C) component. Although used continuously, both the first agent and the second agent are prepared by dissolving them in a liquid to which an appropriate solvent such as water is added. At that time, in addition to the above components, other components can be appropriately added within a range not impairing the effects of the present invention.

  Examples of such additional components include alkyl sulfosuccinates, alkyl ether carboxylates, N-acyl glutamic acids; anionic surfactants such as polyoxyethylene lauryl ether sulfate; conditioning agents such as cationized cellulose; alkyl chlorides Cationic surfactants such as trimethylammonium and dialkyldimethylammonium chloride; amphoteric surfactants such as alkyldiaminoethylglycine and alkyldimethylamine oxide, polyglycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene coconut oil fatty acid glyceryl Nonionic surfactants such as polyoxyethylene alkyl ether; ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin, Polyhydric alcohols such as bitol; Wetting agents such as sodium hyaluronate, sodium pyrrolidone carboxylate, sodium lactate, thickeners such as xanthan gum, hydroxyethyl cellulose, hydroxypropyl cellulose; anti-inflammatory agents such as dipotassium glycyrrhizinate; various amino acids and amino acids In addition to derivatives, plant extracts, preservatives, pH adjusters such as lactic acid, chelating agents, ultraviolet absorbers, antioxidants, oil components, pigments, fragrances and the like can be mentioned.

  Moreover, it is preferable to use the cosmetics for hair washing of this invention, adjusting pH to about 4-7. More preferably, the pH is about 5.0 to 6.8. More preferable pH values are slightly different depending on the first agent or the second agent. The pH of the first agent is adjusted to about 5.5 to 6.8, and the pH of the second agent is adjusted to about 5.0 to 6.5. It is more preferable. When the pH of the first agent and the second agent of the cosmetic for washing hair is lower than 4, the hair is liable to be entangled and stiff due to insufficient foaming, which may cause discoloration. Further, when the pH of the hair washing cosmetic is higher than 7, fading may occur.

  Next, the operation and effect of the present invention will be specifically shown by examples, but the following examples are not of the nature that limits the present invention, and the above-described design changes can be made without departing from the spirit described below. Both are included in the technical scope of the present invention.

[Example 1]
1. Production of hair bundles (bleaching)
Using hair that has not been subjected to chemical treatment (for example, permanent treatment, hair color treatment, bleach treatment, etc.), Toner Bleach Powder EX (powder bleach agent: manufactured by Nakano Pharmaceutical Co., Ltd.) and Caradeco Oxide EX06 (hydrogen peroxide) A bleaching agent prepared by mixing a oxidizer (manufactured by Nakano Seiyaku Co., Ltd.) so as to be 1: 3 (mass ratio) is applied to the hair at a ratio of 1: 1 by mass, and treated at 30 ° C. for 30 minutes. After that, it was washed with a 45 mass% lauryl sulfate triethanolamine solution and then dried. This process was performed three times.

  The hair subjected to the above-described treatment was visually matched with lightness-matched hairs, and a hair bundle having a length of 20 cm and a weight of 15 g was prepared and used for the following evaluation.

(Color processing and evaluation)
Using the above-mentioned bleached hair bundle, N Caradeco N / m9 (oxidative hair dye 1st agent: manufactured by Nakano Pharmaceutical Co., Ltd.) and Caradeco Oxide EX06 (hydrogen peroxide-based oxidizing agent: manufactured by Nakano Pharmaceutical Co., Ltd.) The color agent mixed so as to be 1: 1 (mass ratio) was applied to the hair at a ratio of 1: 1 by mass ratio, and was processed at 30 ° C. for 30 minutes.

2. Evaluation method Using the hair bundle after color treatment obtained above, the first cosmetic agent for hair washing of the components shown in Tables 1 to 4 below (Prescription Examples I-1 to I-29: pH 6.0 to 6.0) "Adjustment effect to 6.5") and the second agent (Prescription Example II-4 in Table 6 to be described later: Adjustment to pH 5.5 to 6.0) "Coloring agent removal effect" and "Hair washing cosmetics" The degree of fading of the hair color before and after the treatment was evaluated by the following method. In addition, after processing with the 1st agent, it washed with water until it processed with the 2nd agent.

(Evaluation method for removal of colorant during hair washing cosmetic treatment)
Regarding the “coloring agent removal effect” when the hair bundles (2) after color treatment that had been pre-washed sufficiently with hot water were washed with cosmetics for washing hair, sensory evaluation was carried out by 10 expert panelists based on the following evaluation criteria, The total value of the evaluation points was determined and judged according to the following criteria.

3 points: high removal effect of colorant 2 points: slightly high removal effect of colorant 1 point: low removal effect of colorant

[Evaluation criteria for colorant removal effect]
◎: 25 points or more ○: 20 points or more, less than 25 points △: 15 points or more, less than 20 points ×: 10 points or more, less than 15 points

(Evaluation method for degree of fading of hair color before and after cosmetic treatment for hair washing)
The color of the hair that has been sufficiently pre-washed with hot water after the color treatment is visually observed, and the color of this hair bundle (one) is taken as the reference color. For the remaining hair bundle (one), after the first agent treatment with each hair washing cosmetic, wash with water, and visually observe the color of the hair bundle after treatment with the second agent, The comparison with the reference color was sensorially evaluated with the following evaluation criteria by 10 expert panelists, the total value of the evaluation points was determined, and the determination was made according to the following criteria.

3 points: less fading of hair color hair 2 points: slightly less fading of hair color hair 1 point: greater fading of hair color hair

[Evaluation criteria for degree of fading]
◎: 25 points or more ○: 20 points or more, less than 25 points △: 15 points or more, less than 20 points ×: 10 points or more, less than 15 points

  These results are shown in the following Tables 1 to 4 together with the component compositions of formulation examples for hair washing cosmetics (Formulation Examples I-1 to I-29) (see Table 6 below for Formulation Example II-4). .

  From the results in Table 1, it can be considered as follows. When (A1) component is not contained (formulation example I-1, I-3 to I-6), it turns out that the fading degree of hair coloring hair is large.

  On the other hand, by containing at least one of the components (A1) and (A2) to (A5), the effect of removing the colorant is high, and the degree of fading of the hair coloring hair is high. It turns out that there are few (prescription examples I-8, I-11 to I-14).

  In addition, among the components (A2) to (A5), it can be seen that (A2) coconut oil fatty acid amidopropyl betaine has a particularly high color agent removal effect and a low degree of fading of hair color hair (Formulation Example I-8) ). Furthermore, compared with the case where the component (A1) or the component (A2) is contained alone, the combination of the component (A1) and the component (A2) to the component (A5) improves the color agent removal effect. It can be seen that the degree of fading of the hair color hair is small (Prescription Examples I-8 to I-10).

  From the results in Table 2, it can be considered as follows. When 0.1 mass% of (A1) component is contained (formulation example I-15), it turns out that there is little fading degree of hair color hair. When the component (A1) is contained in an amount of 5% by mass or more (Prescription Examples I-17 to I-19), it can be seen that the effect of removing the colorant is high and the degree of fading of the hair color hair is small.

  From the results in Table 3, it can be considered as follows. By containing (A2) component, it turns out that the removal effect of a color agent is high and the fading degree of hair color hair is also small. In particular, when the component (A2) is contained in the range of 10 to 20% by mass (Prescription Examples I-21 and I-22), it can be seen that the effect of removing the color agent is high and the degree of fading of the hair color hair is small.

  From the results in Table 4, it can be considered as follows. In the case where the component (B) is not contained (Formulation Example I-25), it can be seen that although the degree of fading of the hair color hair is small, the effect of removing the color agent is low. It turns out that the removal effect of a color agent becomes high by containing (B) component (prescription example I-26 to I-29).

[Example 2]
Using the hair bundle after color processing obtained in Example 1, the first cosmetic agent for hair washing of the components shown in Tables 5 and 6 below (Prescription Examples I-30 to I-34: pH 6.0 to 6. 5) and the second agent (Prescription Examples II-1 to II-7: adjusted to pH 5.5 to 6.0) and “before and after hair treatment cosmetic treatment” The degree of fading of the hair color of hair is evaluated by the same method as in Example 1, and the “difficulty of hair entanglement during the treatment for cosmetics for washing hair” is evaluated by the following method. The “storage stability of the hair” or “the difficulty of squeaking the hair during the treatment with the cosmetic for washing hair” was evaluated by the following method. In addition, after processing with the 1st agent, it washed with water until it processed with the 2nd agent.

(Evaluation method of difficulty in tangling hair during cosmetic treatment for hair washing)
The following criteria are used by 10 expert panelists regarding the “difficulty of hair entanglement” when washing the hair bundle that has been pre-washed sufficiently with hot water with a cosmetic for washing hair and performing the process from foaming to rinsing. Judged by.

3 points: hair does not entangle 2 points: hair does not entangle 1 point: hair entangles

[Evaluation criteria for difficulty in tangling hair]
◎: 25 points or more ○: 20 points or more, less than 25 points △: 15 points or more, less than 20 points ×: 10 points or more, less than 15 points

(Method for evaluating the storage stability of hair washing cosmetics)
About each prescription example, the external appearance after standing at 0 degreeC for 1 day was observed visually, and the following references | standards determined.
○: Transparent uniform liquid △: Slightly faint ×: Faint

(Evaluation method of difficulty of squeaking hair during cosmetic treatment for hair washing)
“Hair squeakiness (feeling of slipping (feeling of fingering))” when the hair bundle after color processing that has been pre-washed with hot water is washed with a cosmetic for washing hair and processed from foaming to rinsing. The following criteria were determined by 10 expert panelists.

3 points: Hair does not squeeze 2 points: Hair does not squeeze 1 point: Hair squeaks

[Evaluation criteria for hair squeaking difficulty]
◎: 25 points or more ○: 20 points or more, less than 25 points △: 15 points or more, less than 20 points ×: 10 points or more, less than 15 points

  These results are shown in Tables 5 and 6 below together with formulation examples of hair washing cosmetics (formulation examples I-30 to I-34, II-1 to II-7).

  From the results in Table 5, it can be considered as follows. When the (D) component is not contained in the first agent (Formulation Example I-30), the color agent removal effect is high, but it can be seen that tangling of the hair during hair washing tends to occur.

  It can be seen that when 2.5% by mass of component (D) is contained (Prescription Example I-34), entanglement of the hair during shampooing is unlikely to occur, but storage stability deteriorates. Moreover, when (D) component is contained in 0.2-1.5 mass% (prescription example I-31-I-33), the tangle of the hair at the time of hair washing does not occur easily, and storage stability is also excellent ( It can be seen that the case of “Δ” was also determined to be an acceptable range.

  From the results in Table 6, it can be considered as follows. When the component (C) is not contained as the second agent (Formulation Example II-1), the effect of removing the color agent is high, and the degree of fading of the hair color hair is small, but it is understood that the squeaking of the hair at the time of washing the hair tends to occur. .

  Moreover, when (C) component is contained 0.1 mass% or more (formulation example II-2-II-7), it turns out that all the evaluation items are excellent.

[Example 3]
Using the hair bundle after color processing obtained in Example 1, the combination of the first agent and the second agent shown in Table 7 below (Prescription Examples I-31 shown in Table 5 and Prescription Examples shown in Table 6) II-4) “Elimination effect of color agent” when hair is washed, “degree of fading of hair color hair before and after treatment for cosmetics for washing hair”, “difficulty of hair entanglement during treatment for cosmetics for washing hair” Further, “the difficulty of squeaking the hair during treatment with the cosmetic for washing hair” was evaluated by the methods shown in Examples 1 and 2. In this example, after the first shampoo treatment, the treatment was performed with or without rinsing before the second shampoo treatment.

  These results are shown in Table 7 below as hair treatment methods (treatment methods 1 to 5).

  From the results in Table 7, it can be considered as follows. When the 1st agent and the 1st agent are used continuously (treatment method 1), it turns out that the fading degree of hair color hair becomes large and the squeak of hair at the time of hair washing tends to occur. In addition, when the second agent and the second agent are used in succession (treatment method 4), it can be seen that the effect of removing the color agent is low and that the hair is easily entangled during washing.

  When the first agent is used after washing the hair with the second agent (treatment method 3), the effect of removing the color agent is low, the degree of fading of the hair color hair is increased, and the entanglement of the hair at the time of washing the hair It turns out that it is easy to happen.

  In contrast, when the second agent is used after washing the hair with the first agent (treatment method 2 and treatment method 5), the effect of removing the color agent is high and the degree of fading of the hair color hair is small. And it turns out that the tangle and the squeak of hair do not occur easily at the time of hair washing.

Claims (6)

(A) As an amphoteric surfactant, it contains (A1) hydroxyalkylhydroxyethyl sarcosine, (A2) coconut oil fatty acid amidopropyl betaine, (A3) lauric acid amidopropyl betaine, (A4) 2-alkyl-N- It contains at least one selected from the group consisting of carboxymethyl-N-hydroxyethylimidazolinium betaine and (A5) alkylhydroxysulfobetaine, and (B) contains an alkyl glucoside, and has a pH of 5.5 to 6.8. a step of cleaning the hair with a first agent,
A hair treatment method wherein the step of washing the hair using a second agent having a pH of 5.0 to 6.5 and containing at least (C) polymethacryloylethyldimethylbetaine is performed according to the order described above. The hair treatment method according to claim 1, wherein the first agent further contains (D) polyoxyethylene phytosterol. The proportion of the (A1) hydroxyalkylhydroxyethyl sarcosine in the entire first agent is 30% by mass or less (excluding 0% by mass), and the proportion of the (B) alkyl glucoside in the entire first agent is 20% by mass or less. The proportion of the (C) polymethacryloylethyldimethylbetaine in the entire second agent is 20% by mass or less (excluding 0% by mass). Hair treatment method. (A) As an amphoteric surfactant, it contains (A1) hydroxyalkylhydroxyethyl sarcosine, (A2) coconut oil fatty acid amidopropyl betaine, (A3) lauric acid amidopropyl betaine, (A4) 2-alkyl-N- It contains at least one selected from the group consisting of carboxymethyl-N-hydroxyethylimidazolinium betaine and (A5) alkylhydroxysulfobetaine, and (B) contains an alkyl glucoside, and has a pH of 5.5 to 6.8. and the first agent,
A cosmetic for washing hair comprising at least (C) a second agent having a pH of 5.0 to 6.5 and containing polymethacryloylethyldimethylbetaine. The hair washing cosmetic according to claim 4 , wherein the first agent further comprises (D) polyoxyethylene phytosterol. The proportion of the (A1) hydroxyalkylhydroxyethyl sarcosine in the entire first agent is 30% by mass or less (excluding 0% by mass), and the proportion of the (B) alkyl glucoside in the entire first agent is 20% by mass or less. (0 mass% exclusive), and the (C) polymerase percentage of the total second agent Tak Leroy Le ethyl dimethyl betaine 20 mass% or less (0 wt% exclusive) according to claim 4 or 5 is Hair cleansing cosmetics.