JP6735145B2 - Hair cleanser - Google Patents

Description

The present invention relates to a hair cleansing agent.

Hair is constantly affected by ultraviolet rays, heat, and drying due to sunlight, and is also damaged by daily hair washing, brushing, heat from a dryer, and the like. In recent years, it has become common to change the appearance of hair by freely changing the hair color (coloring, etc.) and changing the hairstyle by chemical treatment (perm, etc.). It is known that when the frequency of such treatment increases, damage is accumulated in the hair, split ends and broken hair are generated, and the tips of the hair become dry.

Specifically, in Patent Document 1 (Japanese Patent Laid-Open No. 2000-327540), the dropout of the cuticle in the hair washing process is caused by the rubbing of the hairs during lift-up accompanying the swelling of the cuticle site by the anionic surfactant. It is described that this occurs, and a technique for suppressing cuticle lift-up has been proposed.

In addition, a technique using an organic dicarboxylic acid has been proposed as a technique for essentially modifying the hair to improve the luster and cohesion of the hair (Patent Document 2, JP-A-2005-239667).

In addition, it utilizes a sulfate-type anionic surfactant having a specific structure and an ether carboxylate-type surfactant having a specific structure, has excellent foaming properties, and suppresses the swelling of the horny layer of the scalp and suppresses the scalp. A technique for suppressing irritation to the skin and itch has been proposed (Patent Document 3, JP 2010-235523A).

Further, by using a specific anionic surfactant, nonionic surfactant, or amphoteric surfactant, it sufficiently foams even in the presence of dirt such as sebum, has excellent detergency, is smooth when foaming and rinsing, and A technique has been proposed in which hair is smooth and soft after being dried, and a cohesion is imparted (Patent Document 4, JP 2012-1512 A).

JP 2000-327540 A JP, 2005-239667, A JP, 2010-235523, A JP2012-1512A

For consumers who want to change the appearance of their hair and enjoy fashion, color and perm are essential items, and brushing, blowing, and ironing are used to extend the hair in daily hair care activities. When the hair is stretched, a phenomenon in which the cuticle flips up (lift-up) is observed, and it is considered that peeling of the cuticle is promoted. Therefore, there is a demand for a hair cosmetic composition capable of suppressing lift-up that occurs when a force for stretching hair is applied and suppressing cuticle separation.

In this regard, Patent Document 1 discloses that by causing a specific acid to act on the anionic surfactant to bring it to a specific pH, the lift-up of cuticles is suppressed and the peeling of cuticles is suppressed. There was room for improvement in that the effect of suppressing lift-up when stretched was insufficient.
Further, in Patent Documents 2 to 4 as well, various hair care effects are disclosed, but there is no description concerning the suppression of peeling of the cuticle when the hair is stretched, and there is room for improvement in that the effect is not sufficient. there were.

The present invention has been made in view of these circumstances, and suppresses the peeling of the cuticle when the hair is stretched due to the repetition of brushing, blowing, ironing, etc. in daily hair care behavior, resulting in deterioration of feeling. Provided is a hair cleansing composition capable of reducing the gloss and improving the gloss and cohesiveness of the finish.

The present inventors have found that the above problem can be solved by blending a specific organic acid and a nonionic surfactant in a specific anionic surfactant.

According to the present invention, there is provided a hair cleansing agent containing the following components (A) to (C) and water.
(A) Ether carboxylate type anionic surfactant represented by the following general formula (1) 0.5% by mass or more and 12% by mass or less R ¹ O—(CH ₂ —CH ₂ O) _s —CH ₂ COOX ¹ (1)
(In the general formula (1), R ¹ represents an alkyl group or an alkenyl group having 10 to 18 carbon atoms, X ¹ represents an alkali metal, alkaline earth metal, ammonium, alkanolamine or a cation derived from a basic amino acid. And s represents a number of 0.5 or more and 10 or less in mass average.)
(B) Succinic acid or its salt 0.1 mass% or more and 5 mass% or less (C) Surfactant represented by the following general formula (2) 0.1 mass% or more and 2 mass% or less R ² O(CH ₂ CH(CH ₃ )O) _u H (2)
(In the general formula (2), R ² represents a linear or branched alkyl group or alkenyl group having 8 to 10 carbon atoms, and u represents a number of 0.5 to 4 in mass average.)

Further, according to the present invention, there is provided a method for cleaning hair, which comprises applying the hair cleansing agent of the present invention to hair and washing the hair.

According to the present invention, in daily hair care behavior, it is possible to suppress peeling of the cuticle when the hair is stretched due to repetition of brushing, blowing, ironing, etc., and to reduce deterioration of feel and gloss and cohesiveness of finish. An improved hair cleansing composition can be provided.

Hereinafter, embodiments of the present invention will be described with reference to specific examples of each component. Each component may be used alone or in combination of two or more.
In addition, in the present specification, pH means a measured value (glass electrode measuring method) when diluted 20 times at 25°C.

(Component (A))
The component (A) is an ether carboxylate type anionic surfactant represented by the following general formula (1).
^{_{R 1 O- (CH 2 -CH 2}} O) s -CH 2 COOX 1 (1)
(In the general formula (1), R ¹ represents an alkyl group or an alkenyl group having 10 to 18 carbon atoms, X ¹ represents an alkali metal, alkaline earth metal, ammonium, alkanolamine or a cation derived from a basic amino acid. And s represents a number of 0.5 or more and 10 or less in mass average.)

In the hair cleansing agent of the present embodiment, the ether carboxylate type anionic surfactant of the component (A) is a group of compounds having a hydrophobic group and a carboxyl group via a polyoxyethylene chain, and has the above general formula ( It is represented by 1).

As R ¹ in the general formula (1), a foaming effect at the time of washing is enriched, and the components (B) and (C) described later are used in combination to obtain a sufficient effect of suppressing cuticle peeling when the hair is stretched. From the viewpoint, an alkyl group having 12 or more carbon atoms is preferable, and an alkyl group having 16 or less carbon atoms is preferable.

Further, in the general formula (1), s, which is the average number of moles of added ethylene oxide, is 0.5 or more, and preferably 1 or more on a mass (weight) average, from the viewpoint of improving the foamability. Further, it is 10 or less, preferably 6 or less.

In the general formula (1), X ¹ which is a counter ion is an alkali metal such as sodium or potassium;
Alkaline earth metals such as calcium and magnesium;
Ammonium;
Examples include alkanolamine-derived cations such as monoethanolamine, diethanolamine and triethanolamine; and basic amino acid-derived cations such as arginine and lysine.

The component (A) may be used alone or in combination of two or more, and the content thereof in the hair cleansing agent is 0. It is 5% by mass or more, preferably 0.7% by mass or more, and 12% by mass or less, preferably 8% by mass or less. Further, from the viewpoint of solubility of the base material, it is more preferably 4% by mass or less.

(Component (B))
Next, the component (B) will be described. The component (B) is succinic acid or a salt thereof.
In the present embodiment, by using the component (B), the component (A) and the component (C) described later in combination in the hair cleansing agent, the cuticle peeling that occurs during daily hair care behavior is effectively suppressed. can do. Further, by using the components (A) to (C) in combination, it is possible to maintain the hair in a healthy state, and thus, for example, reduce the deterioration of the feel of the hair and improve the gloss and cohesiveness of the finish. It becomes possible.

The content of the component (B) in the hair cleansing agent is 0.1% by mass or more with respect to the entire hair cleansing agent, from the viewpoints of the effect of suppressing the peeling of cuticles at the time of stretching the hair and imparting gloss to the hair. It is preferably 0.3% by mass or more, more preferably 2% by mass or more, and further preferably 3% by mass or more. Further, from the viewpoint of stability of the hair cleansing agent, the content of the component (B) is 5% by mass or less, preferably 3.5% by mass or less, based on the whole hair cleaning agent.

(Component (C))
Next, the component (C) will be described. The component (C) is a polyoxypropylene alkyl ether type nonionic surfactant represented by the following general formula (2).
R ² O(CH ₂ CH(CH ₃ )O) _u H (2)
(In the general formula (2), R ² represents a linear or branched alkyl group or alkenyl group having 8 to 10 carbon atoms, and u represents a number of 0.5 to 4 in mass average.)

In the general formula (2), R ² preferably has 8 carbon atoms, from the viewpoint of foaming and improving the gloss of hair.
Further, in the general formula (2), u is preferably 2 or more and 3.5 or less in terms of mass average from the viewpoint of foaming and improvement of gloss of hair.

The content of the component (C) in the hair cleansing agent is 0.1% by mass or more with respect to the entire hair cleansing agent from the viewpoint of improving foaming of the hair cleansing agent and gloss of the hair, and preferably 0. It is 5% by mass or more, and more preferably 1% by mass or more. From the viewpoint of reducing the squeaking of hair during washing, the content of the component (C) is 2% by mass or less, preferably 1.5% by mass or less, and more preferably 1% by mass based on the total amount of the hair cleansing agent. It is not more than 2% by mass.

Further, in the hair cleansing agent of the present embodiment, the content ratio (mass ratio) of the components (A), (B) and (C) is such that the cuticle peeling-suppressing effect at the time of hair stretching, the stain cleaning property is improved, and From the viewpoint of improving the balance of the effect of improving gloss and cohesion after washing, the following is preferable.

That is, from the viewpoints of the effect of suppressing cuticle peeling at the time of stretching hair, the cleanability of stains, and the improvement in gloss and cohesion after washing, the mass ratio of the component (A) to the component (B) in the hair cleansing agent ((A)/ (B)) is preferably 0.5 or more, more preferably 0.8 or more, still more preferably 1 or more, and preferably 50 or less, more preferably 20 or less, further preferably 15 or less. It is as follows.

Further, from the viewpoints of the effect of suppressing cuticle peeling at the time of hair stretching, the cleanability of stains, and the improvement of gloss and cohesion after washing, the mass ratio of the component (A) to the component (C) in the hair cleansing agent ((A)/ (C)) is preferably 0.8 or more, more preferably 2 or more, still more preferably 3 or more, and preferably 45 or less, more preferably 10 or less, further preferably 8 or less. is there.

Further, from the viewpoints of the effect of suppressing cuticle peeling at the time of stretching hair, the cleanability of stains, and the improvement of gloss and cohesion after washing, the mass ratio of the component (B) to the component (C) in the hair cleansing agent ((B)/ (C)) is preferably 0.05 or more, more preferably 0.3 or more, further preferably 1 or more, and preferably 40 or less, more preferably 10 or less, and further preferably 6 It is as follows.

More specifically, the hair cleansing agent in the present embodiment is an aqueous hair cleansing agent.
That is, the hair cleansing agent in the present embodiment further contains water. As the water, ion exchanged water, distilled water or the like can be used.
The content of water in the hair cleansing agent can be, for example, the balance excluding components other than water in the hair cleansing agent. Further, the content of water is preferably 50% by mass or more, and more preferably 60% by mass or more, based on the entire hair cleansing agent. Further, it is preferably 98% by mass or less, and more preferably 95% by mass or less.

Next, the pH of the hair cleansing agent will be described.
In the hair cleansing composition of the present embodiment, the succinic acid as the component (B) has a pH at 25° C. when diluted 20 times with water from the viewpoint of maximizing the effect of suppressing cuticle peeling during hair stretching. , Preferably 10 or less, more preferably 9.6 or less, still more preferably 6.5 or less. Further, the pH is 6.5 or less, preferably 6 or less, more preferably 5.5 or less from the viewpoint of the stain removal performance of the hair cleansing agent. From the same viewpoint as above, the pH is preferably 2 or more, more preferably 3 or more, and further preferably 3.5 or more.

In addition, in the present embodiment, the hair cleansing agent may contain components other than the components described above.
For example, the hair cleanser may contain the following component (D).
(D) One or more cationized polysaccharides selected from the group consisting of cationized cellulose and cationized guar gum

Of the component (D), the cationized cellulose is preferably one represented by the following general formula (3).

In the general formula (3), A represents a residue of anhydroglucose unit, a is an integer of 50 or more and 20000 or less, and each R ³ is a substituent represented by the following general formula (4). Show.

(In the general formula (4), R′ and R″ are each independently an alkylene group having 2 or 3 carbon atoms, b is an integer of 0 or more and 10 or less, c is an integer of 0 or more and 3 or less, and d is 0 or more. An integer of 10 or less, R″′ is an alkylene group or a hydroxyalkylene group having 1 to 3 carbon atoms, R ⁴ , R ⁵ and R ⁶ are the same or different, and an alkyl group having 10 or less carbon atoms, It may represent an aryl group or an aralkyl group, or may contain a nitrogen atom in the formula to form a heterocycle, and Z ₁ is a monovalent anion (chlorine, bromine, iodine, sulfuric acid, sulfonic acid, methyl). Sulfuric acid, phosphoric acid, nitric acid, etc.))

The cation substitution degree of the cationized cellulose represented by the general formula (3) is preferably 0.01 or more and 1 or less. That is, in the general formula (4), the average value of c per anhydroglucose unit is preferably 0.01 or more and 1 or less, and more preferably 0.02 or more and 0.5 or less. Further, the sum of b+d is preferably 1 or more and 3 or less on average. The substitution degree is preferably 1 or less from the viewpoint of reaction yield.
For example, R ⁴ , R ⁵ and R ⁶ are all CH ₃ groups, or two of R ⁴ , R ⁵ and R ⁶ are short chain alkyl groups such as CH ₃ groups and the remaining one is a carbon atom. A long-chain alkyl group having a number of 10 to 20 is preferable. The molecular weight of the cationized cellulose used here is preferably about 100,000 or more and 8,000,000 or less.

Commercially available products of cationized cellulose include Poise C-60H (manufactured by Kao Corporation), Poise C-80H (manufactured by Kao Corporation), Katsello L-150 (manufactured by Kao Corporation), Polymer JR-400 (manufactured by Dow Chemical Co.) and the like. Is mentioned.

The component (D) has a main chain derived from anhydroglucose represented by the following general formula (5), and the degree of substitution of the cationized ethyleneoxy group is 0.01 or more and 2.5 or less, Cationized hydroxypropyl cellulose having a propyleneoxy group substitution degree of 0.1 or more and 2.8 or less may be contained.

(In the general formula (5), R ⁷ , R ⁸ and R ⁹ each independently represent a substituent having a cationized ethyleneoxy group and a propyleneoxy group represented by the following general formula (6) or (7). , N is the average degree of polymerization of anhydroglucose, and is 50 or more and 5000 or less.)

(In the general formulas (6) and (7), ^one of Y ¹ and Y ² is a hydrogen atom, the other is a cationic group represented by the following general formula (8), and PO is a propyleneoxy group. shown .p the general formula (6) or (7) cationized ethyleneoxy groups contained in the number of ^{(-CH (Y 1) -CH (} Y 2) -O-), q is the general formula ( 6) or (7) represents the number of propyleneoxy groups (-PO-) contained in p and q each independently represent 0 or a positive integer, and when neither p nor q is 0, a cation The addition order of the modified ethyleneoxy group and the propyleneoxy group does not matter, and when p and/or q is 2 or more, it may be either a block bond or a random bond.)

(In the general formula (8), R ¹⁰ , R ¹¹ and R ¹² each independently represent a linear or branched alkyl group having 1 to 3 carbon atoms, and Z ₂ ^— represents an anionic group.)

Further, among the component (D), as the cationized guar gum, those represented by the following general formula (9) are preferable.

(In the general formula (9), D is a guar gum residue, R ¹³ is an alkylene group or a hydroxyalkylene group, R ¹⁴ , R ¹⁵ and R ¹⁶ are the same or different, and an alkyl group having 10 or less carbon atoms. , An aryl group, or an aralkyl group, or may contain a nitrogen atom in the formula to form a heterocycle, and Z ₃ ^- is an anion (chlorine, bromine, iodine, sulfuric acid, sulfonic acid, methylsulfate, (Phosphoric acid, nitric acid, etc.), and f represents a positive integer.)

The cation substitution degree of the cationized guar gum derivative is preferably 0.01 or more and 1 or less, and more preferably 0.02 or more and 0.5 or less cation groups introduced into one sugar unit. .. This type of cationic polymer is described in JP-B-58-35640, JP-B-60-46158 and JP-A-58-53996. For example, as a commercial product, Rhodia Inc. .) under the trade name Jaguar, and examples thereof include Jaguar C-13C and Jaguar C-14SK. Also, Labor Gum CG-M manufactured by Sumitomo Dainippon Pharma Co., Ltd. can be mentioned.

The content of the component (D) in the hair cleansing agent is preferably 0.01% by mass or more based on the total amount of the hair cleansing agent from the viewpoint of improving the finger passage during washing and the cohesion of hair after drying. , More preferably 0.1% by mass or more, further preferably 0.2% by mass or more. Further, from the viewpoint of making the viscosity of the cleansing base preferable, the content of the component (D) is preferably 2.5 mass% or less, and more preferably 1.2 mass% with respect to the entire hair cleansing agent. Below, it is 1 mass% or less more preferably.

The hair cleansing agent of the present embodiment further comprises an anionic surfactant other than the component (A) and a nonionic surface other than the component (C) in order to improve the cleaning performance and obtain a desired effect on the finish after drying. An activator, a cationic surfactant, an amphoteric surfactant, silicones, other oil agents and the like may be contained.

Of these, specific examples of anionic surfactants other than the component (A) include alkyl sulfates, alkenyl sulfates, polyoxyalkylene alkyl ether sulfates, polyoxyalkylene alkenyl ether sulfates, and sulfosuccinic acid alkylene alkylphenyl ether sulfates. And the like; sulfonic acid type anionic surfactants such as sulfosuccinic acid alkyl ester salt, polyoxyalkylene sulfosuccinic acid alkyl ester salt, and alkane sulfonate. Among them, polyoxyalkylene alkyl ether sulfates, polyoxyalkylene alkenyl ether sulfates, alkyl sulfates, and alkenyl sulfates are preferable. Among them, polyoxyalkylene alkyl ether sulfates are represented by the following general formula (10). Polyoxyethylene alkyl ether sulfate is preferred.

R ¹⁷ O(CH ₂ CH ₂ O) _v SO ₃ M (10)
(In the general formula (10), R ¹⁷ represents an alkyl group or an alkenyl group having 10 to 18 carbon atoms, and M represents a cation derived from an alkali metal, an alkaline earth metal, ammonium, an alkanolamine, or a basic amino acid. , V is the average number of moles of ethylene oxide added, which is a mass average number of 0.5 or more and 5 or less.)

Among these, those in which R ¹⁷ in the general formula (10) is an alkyl group having 12 or more and 14 or less carbon atoms are preferable from the viewpoint of achieving both quick foaming and good foam feeling. The average added mole number v of ethylene oxide is preferably 0.9 or more and 4 or less, and more preferably 1 or more and 3 or less. Furthermore, a polyoxyethylene alkyl ether sulfate in which M is ammonium or sodium is preferable.

From the viewpoint of further improving foaming, the content of the anionic surfactant other than the component (A) is preferably 3% by mass or more, more preferably 5% by mass or more, and further preferably 5% by mass or more with respect to the entire hair cleaning agent. It is preferably at least 7% by mass. Further, from the viewpoint of improving foam breakage and suppressing the residual feeling during rinsing, the content of the anionic surfactant other than the component (A) with respect to the entire hair wash is preferably 20% by mass or less, and more preferably It is 18 mass% or less, more preferably 15 mass% or less.

In addition, a pH adjuster other than the above component (B) may be added to the hair cleansing agent in the present embodiment. Examples of such a pH adjuster include organic acids other than the above component (B), and organic carboxylic acids such as lactic acid, malic acid, and citric acid can also be used. In addition, as another pH adjuster, a base such as sodium hydroxide, potassium hydroxide, or ammonium chloride may be used in combination with these organic acids.

In the hair cleansing composition of the present embodiment, in addition to the above-mentioned components, components used in ordinary hair cleansing compositions can be appropriately blended depending on the desired effect. Examples of such optional components include anti-dandruff agents, vitamins, bactericides, anti-inflammatory agents (glycyrrhizinic acid, glycyrrhetinic acid, derivatives thereof, etc.), preservatives, chelating agents, moisturizers (sorbitol, panthenol, etc.). , Colorants (dye, pigment, etc.), extracts (polar solvent extract of eucalyptus, protein obtained from shells or pearls with nacre or its hydrolyzate, honey, royal jelly, protein obtained from silk or its hydrolysis Substance, protein-containing extract obtained from seeds of legumes, Panax ginseng extract, rice germ extract, Hiba Mata extract, aloe extract, lotus extract, pomegranate extract, nobara extract, chamomile extract, licorice extract Substances, peach leaf extract, chlorella extract, etc.), pearling agents such as titanium oxide, fragrances, ultraviolet absorbers, antioxidants, shea butter, rose water, orange oil, eucalyptus oil and the like.

The hair cleansing agent of the present embodiment is produced, for example, by mixing the components (A) to (C) with other components as appropriate and dissolving them in water. Specifically, the components (B) and (C) are added to water heated to about 70 to 100° C. and stirred to dissolve. Further, it is obtained by adding the component (A), stirring and homogenizing, and then cooling to room temperature. Furthermore, when other surfactants are included, they may be mixed at any time during heating, but for example, water heated to about 70 to 100° C. may be added to components (A) and (C). Other surfactants than the above) are added, and the mixture is stirred to make it uniform. After that, it is preferable that the components (B) and (C) are added and stirred to be dissolved, the component (A) is added, and the mixture is stirred and homogenized, and then cooled to 30° C. or lower. The pH adjustment with an acid or base other than the component (B) is preferably performed at 40° C. or lower. When the component (D) is contained, it may be added at any time as long as the water is heated to about 70 to 100° C., but it is preferably added before the component (A) is added and dissolved or uniformly dispersed.

The form of the hair cleansing agent of the present embodiment can be appropriately selected from a liquid form, a gel form and the like, but a liquid form using water or water and a lower alcohol as a solvent is preferable.

Further, the method for cleaning hair using the hair cleansing agent according to the present embodiment includes, for example, applying the hair cleansing agent to hair and washing the hair.
In the hair cleansing agent according to the present embodiment, the components (A) to (C) are used in combination, and therefore the peeling of the cuticle can be suppressed. For example, in daily hair care activities, it is possible to suppress the peeling of the cuticle that progresses when the force to stretch the hair is applied by using a heating device such as brushing, blowing, ironing, etc. It is possible to maintain it. Further, by using the hair cleansing agent according to the present embodiment, it is possible to reduce the deterioration of feeling and to improve the gloss and cohesiveness of the finish.

The embodiments of the present invention have been described above, but these are examples of the present invention, and various configurations other than the above can be adopted.

With regard to the embodiments described above, the preferred aspects of the present invention will be further disclosed below.

<1> A hair cleansing agent containing the following components (A) to (C) and water.
(A) Ether carboxylate type anionic surfactant represented by the following general formula (1) 0.5% by mass or more and 12% by mass or less R ¹ O—(CH ₂ —CH ₂ O) _s —CH ₂ COOX ¹ (1)
(In the general formula (1), R ¹ represents an alkyl group or an alkenyl group having 10 to 18 carbon atoms, X ¹ represents an alkali metal, alkaline earth metal, ammonium, alkanolamine or a cation derived from a basic amino acid. And s represents a number of 0.5 or more and 10 or less in mass average.)
(B) Succinic acid or its salt 0.1 mass% or more and 5 mass% or less (C) Surfactant represented by the following general formula (2) 0.1 mass% or more and 2 mass% or less R ² O(CH ₂ CH(CH ₃ )O) _u H (2)
(In the general formula (2), R ² represents a linear or branched alkyl group or alkenyl group having 8 to 10 carbon atoms, and u represents a number of 0.5 to 4 in mass average.)

（上記一般式（５）中、Ｒ⁷、Ｒ⁸およびＲ⁹は、それぞれ独立に下記一般式（６）または（７）で表されるカチオン化エチレンオキシ基とプロピレンオキシ基を有する置換基を示し、ｎはアンヒドログルコースの平均重合度を示し、５０以上５０００以下である。）

（上記一般式（６）および（７）中、Ｙ¹およびＹ²は、一方が水素原子であり、他方が下記一般式（８）で表されるカチオン性基を示し、ＰＯはプロピレンオキシ基を示す。ｐは一般式（６）または（７）中に含まれるカチオン化エチレンオキシ基（−ＣＨ（Ｙ¹）−ＣＨ（Ｙ²）−Ｏ−）の数を示し、ｑは一般式（６）または（７）中に含まれるプロピレンオキシ基（−ＰＯ−）の数を示し、ｐおよびｑはそれぞれ独立に０または正の整数である。ｐおよびｑのどちらもが０でない場合、カチオン化エチレンオキシ基とプロピレンオキシ基の付加順序は問わず、さらにｐおよび／またはｑが２以上である場合は、ブロック結合またはランダム結合のいずれであってもよい。）

（上記一般式（８）中、Ｒ¹⁰、Ｒ¹¹およびＲ¹²は、それぞれ独立に炭素数１以上３以下の直鎖または分岐のアルキル基を示し、Ｚ₂ ^-はアニオン性基を示す。）
＜６＞ 成分（Ａ）において、上記一般式（１）中のＲ¹が好ましくは炭素数１２以上のアルキル基であり、また、好ましくは炭素数１６以下のアルキル基であり；
上記一般式（１）中のｓが、好ましくは１以上であり、また、好ましくは６以下であり；
上記一般式（１）中のＸ¹が、好ましくはナトリウムおよびカリウムからなる群から選ばれるアルカリ金属；カルシウムおよびマグネシウムからなる群から選ばれるアルカリ土類金属；アンモニウム；モノエタノールアミン、ジエタノールアミンおよびトリエタノールアミンからなる群から選ばれるアルカノールアミン由来のカチオン；ならびにアルギニンおよびリジンからなる群から選ばれる塩基性アミノ酸由来のカチオンである、前記＜１＞乃至＜５＞のいずれか１に記載の毛髪洗浄剤。
＜７＞ 毛髪洗浄剤中の成分（Ａ）の含有量が、毛髪洗浄剤全体に対して、好ましくは０．５質量％以上、より好ましくは０．７質量％以上であり、また、好ましくは１２質量％以下であり、より好ましくは８質量％以下、さらに好ましくは４質量％以下である、前記＜１＞乃至＜６＞のいずれか１に記載の毛髪洗浄剤。
＜８＞ 毛髪洗浄剤中の成分（Ｂ）の含有量が、毛髪洗浄剤全体に対して、好ましくは０．１質量％以上であり、より好ましくは０．３質量％以上、さらに好ましくは２質量％以上、よりさらに好ましくは３質量％以上であり、また、好ましくは５質量％以下であり、より好ましくは３．５質量％以下である、前記＜１＞乃至＜７＞のいずれか１に記載の毛髪洗浄剤。
＜９＞ 成分（Ｃ）において、上記一般式（２）のＲ²の炭素数が好ましくは８であり；
上記一般式（２）のｕが好ましくは質量平均で２以上３．５以下である、前記＜１＞乃至＜８＞のいずれか１に記載の毛髪洗浄剤。
＜１０＞ 毛髪洗浄剤中の成分（Ｃ）の含有量が、毛髪洗浄剤全体に対して、好ましくは０．１質量％以上であり、より好ましくは０．５質量％以上、さらに好ましくは１質量％以上であり、また、好ましくは２質量％以下であり、より好ましくは１．５質量％以下、さらに好ましくは１．２質量％以下である、前記＜１＞乃至＜９＞のいずれか１に記載の毛髪洗浄剤。
＜１１＞ 毛髪洗浄剤における成分（Ｃ）に対する成分（Ａ）の質量割合（（Ａ）／（Ｃ））が、好ましくは０．８以上であり、より好ましくは２以上、さらに好ましくは３以上であり、また、好ましくは４５以下であり、より好ましくは１０以下、さらに好ましくは８以下である、前記＜１＞乃至＜１０＞のいずれか１に記載の毛髪洗浄剤。
＜１２＞ 毛髪洗浄剤中の水の含有量が、好ましくは毛髪洗浄剤中の水以外の成分を除いた残部であり、毛髪洗浄剤全体に対してより好ましくは５０質量％以上、さらに好ましくは６０質量％以上であり、また、より好ましくは９８質量％以下、さらに好ましくは９５質量％以下である、前記＜１＞乃至＜１１＞のいずれか１に記載の毛髪洗浄剤。
＜１３＞ 毛髪洗浄剤を水で２０倍に希釈したときの２５℃におけるｐＨが、好ましくは１０以下であり、より好ましくは９．６以下、さらに好ましくは６．５以下であるか、あるいは、
毛髪洗浄剤を水で２０倍に希釈したときの２５℃におけるｐＨが、好ましくは６．５以下であり、より好ましくは６以下、さらに好ましくは５．５以下であり、また、好ましくは２以上であり、より好ましくは３以上であり、さらに好ましくは３．５以上である、前記＜１＞乃至＜１２＞のいずれか１に記載の毛髪洗浄剤。
＜１４＞ さらに（Ｄ）カチオン化セルロースおよびカチオン化グアーガムからなる群から選択される１種以上のカチオン化多糖を含み、
毛髪洗浄剤中の成分（Ｄ）の含有量が、毛髪洗浄剤全体に対して好ましくは０．０１質量％以上であり、より好ましくは０．１質量％以上、さらに好ましくは０．２質量％以上であり、また、好ましくは２．５質量％以下であり、より好ましくは１．２質量％以下、さらに好ましくは１質量％以下である、前記＜１＞乃至＜１３＞のいずれか１に記載の毛髪洗浄剤。
＜１５＞ 成分（Ａ）以外のアニオン界面活性剤、成分（Ｃ）以外のノニオン界面活性剤、カチオン界面活性剤、両性界面活性剤、シリコーン類、および、他の油剤からなる群から選択される１種以上をさらに含み；
好ましくは、成分（Ａ）以外のアニオン界面活性剤をさらに含み；
より好ましくは、アルキル硫酸塩、アルケニル硫酸塩、ポリオキシアルキレンアルキルエーテル硫酸塩、ポリオキシアルキレンアルケニルエーテル硫酸塩、スルホコハク酸アルキレンアルキルフェニルエーテル硫酸塩等の硫酸塩型アニオン界面活性剤；スルホコハク酸アルキルエステル塩、ポリオキシアルキレンスルホコハク酸アルキルエステル塩およびアルカンスルホン酸塩等のスルホン酸型アニオン界面活性剤からなる群から選ばれる１種以上を含み；
さらに好ましくはポリオキシアルキレンアルキルエーテル硫酸塩、ポリオキシアルキレンアルケニルエーテル硫酸塩、アルキル硫酸塩およびアルケニル硫酸塩からなる群から選ばれる１種以上を含み；
よりさらに好ましくは上記一般式（１０）で表されるポリオキシエチレンアルキルエーテル硫酸塩を含み；
殊更好ましくは上記一般式（１０）中のＲ¹⁷が炭素数１２以上１４以下のアルキル基であり、ｖが０．９以上４以下であり、Ｍがアンモニウムまたはナトリウムであるポリオキシエチレンアルキルエーテル硫酸塩を含む、前記＜１＞乃至＜１４＞のいずれか１に記載の毛髪洗浄剤。
＜１６＞ 成分（Ａ）以外のアニオン界面活性剤をさらに含み、毛髪洗浄剤中の成分（Ａ）以外のアニオン界面活性剤の含有量が、毛髪洗浄剤全体に対して、好ましくは３質量％以上であり、より好ましくは５質量％以上、さらに好ましくは７質量％以上であり、また、好ましくは２０質量％以下であり、より好ましくは１８質量％以下、さらに好ましくは１５質量％以下である、前記＜１＞乃至＜１５＞のいずれか１に記載の毛髪洗浄剤。
＜１７＞ 成分（Ｂ）以外のｐＨ調整剤をさらに含み、好ましくは、乳酸、リンゴ酸、クエン酸等の有機カルボン酸、水酸化ナトリウム、水酸化カリウム、塩化アンモニウム等の塩基からなる群から選択される１種以上をさらに含む、前記＜１＞乃至＜１６＞のいずれか１に記載の毛髪洗浄剤。
＜１８＞ 前記＜１＞乃至＜１７＞のいずれか１に記載の毛髪洗浄剤を毛髪に適用し、洗い流すことを含む、毛髪の洗浄方法。
＜１９＞ 前記＜１＞乃至＜１７＞のいずれか１に記載の毛髪洗浄剤を毛髪に適用し、洗い流すことを含む、毛髪延伸時のキューティクル剥離を抑制する方法。
＜２０＞ 前記＜１＞乃至＜１７＞のいずれか１に記載の毛髪洗浄剤を毛髪に適用し、洗い流すことを含み、好ましくは前記洗い流すことの後、毛髪を延伸することを含む、毛髪洗浄剤の使用方法。
＜２１＞ 前記＜１＞乃至＜１７＞のいずれか１に記載の毛髪洗浄剤の、毛髪延伸時のキューティクル剥離の抑制のための使用。
＜２２＞ 毛髪延伸時のキューティクル剥離を抑制する洗浄剤の製造のための、前記＜１＞乃至＜１７＞のいずれか１に記載の毛髪洗浄剤の使用。 <2> The mass ratio ((A)/(B)) of the component (A) to the component (B) in the hair cleaning agent is preferably 0.5 or more, more preferably 0.8 or more, The hair cleansing agent according to <1>, which is preferably 1 or more, preferably 50 or less, more preferably 20 or less, still more preferably 15 or less.
<3> The mass ratio ((B)/(C)) of the component (B) to the component (C) in the hair cleansing agent is preferably 0.05 or more, more preferably 0.3 or more, further The hair cleansing agent according to <1> or <2>, which is preferably 1 or more, preferably 40 or less, more preferably 10 or less, further preferably 6 or less.
<4> further comprising (D) one or more cationized polysaccharides selected from the group consisting of cationized cellulose and cationized guar gum;
Preferably, at least one selected from the group consisting of cationized cellulose represented by the above general formula (3) and the following general formula (5) and cationized guar gum represented by the above general formula (9);
More preferably, it contains one or more selected from the group consisting of Poise C-60H, Poise C-80H, Catisero L-150, Polymer JR-400, Jaguar C-13C, Jaguar C-14SK and Laborgum CG-M, The hair cleansing agent according to any one of <1> to <3>.
<5> The component (D) has a main chain derived from anhydroglucose represented by the following general formula (5), and the degree of substitution of the cationized ethyleneoxy group is 0.01 or more and 2.5 or less. The hair cleansing agent according to <4>, which contains cationized hydroxypropyl cellulose having a propyleneoxy group substitution degree of 0.1 or more and 2.8 or less.

(In the general formula (5), R ⁷ , R ⁸ and R ⁹ each independently represent a substituent having a cationized ethyleneoxy group and a propyleneoxy group represented by the following general formula (6) or (7). , N is the average degree of polymerization of anhydroglucose, and is 50 or more and 5000 or less.)

(In the general formulas (6) and (7), ^one of Y ¹ and Y ² is a hydrogen atom, the other is a cationic group represented by the following general formula (8), and PO is a propyleneoxy group. shown .p the general formula (6) or (7) cationized ethyleneoxy groups contained in the number of ^{(-CH (Y 1) -CH (} Y 2) -O-), q is the general formula ( 6) or (7) represents the number of propyleneoxy groups (-PO-) contained in p and q each independently represent 0 or a positive integer, and when neither p nor q is 0, a cation The addition order of the ethylene oxide group and the propyleneoxy group does not matter, and when p and/or q is 2 or more, it may be either a block bond or a random bond.)

(In the general formula (8), R ¹⁰ , R ¹¹ and R ¹² each independently represent a linear or branched alkyl group having 1 to 3 carbon atoms, and Z ₂ ^— represents an anionic group.)
<6> In the component (A), R ¹ in the general formula (1) is preferably an alkyl group having 12 or more carbon atoms, and preferably an alkyl group having 16 or less carbon atoms;
S in the general formula (1) is preferably 1 or more, and preferably 6 or less;
X ¹ in the general formula (1) is preferably an alkali metal selected from the group consisting of sodium and potassium; an alkaline earth metal selected from the group consisting of calcium and magnesium; ammonium; monoethanolamine, diethanolamine and triethanol. An alkanolamine-derived cation selected from the group consisting of amines; and a basic amino acid-derived cation selected from the group consisting of arginine and lysine, wherein the hair cleansing agent according to any one of <1> to <5> above. ..
<7> The content of the component (A) in the hair cleansing agent is preferably 0.5% by mass or more, more preferably 0.7% by mass or more, based on the whole hair cleaning agent, and preferably The hair cleansing agent according to any one of <1> to <6>, which is 12% by mass or less, more preferably 8% by mass or less, and further preferably 4% by mass or less.
<8> The content of the component (B) in the hair cleansing agent is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and further preferably 2 with respect to the entire hair cleaning agent. 1% by mass or more, more preferably 3% by mass or more, preferably 5% by mass or less, and more preferably 3.5% by mass or less. The hair cleansing agent according to.
<9> In the component (C), R ^{2 in} the general formula (2) preferably has 8 carbon atoms;
The hair cleansing agent according to any one of <1> to <8>, wherein u in the general formula (2) is preferably 2 or more and 3.5 or less on a mass average basis.
<10> The content of the component (C) in the hair cleansing agent is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and further preferably 1 with respect to the entire hair cleaning agent. Any of the above items <1> to <9>, which is at least 2% by mass, preferably at most 2% by mass, more preferably at most 1.5% by mass, further preferably at most 1.2% by mass. The hair cleansing agent according to 1.
<11> The mass ratio ((A)/(C)) of the component (A) to the component (C) in the hair cleansing agent is preferably 0.8 or more, more preferably 2 or more, still more preferably 3 or more. And preferably 45 or less, more preferably 10 or less, and further preferably 8 or less, according to any one of the items <1> to <10>.
<12> The content of water in the hair cleansing agent is preferably the balance excluding components other than water in the hair cleansing agent, more preferably 50% by mass or more based on the entire hair cleansing agent, and further preferably 60% by mass or more, more preferably 98% by mass or less, and further preferably 95% by mass or less, according to any one of the above items <1> to <11>.
<13> The pH at 25° C. when the hair cleansing agent is diluted 20-fold with water is preferably 10 or less, more preferably 9.6 or less, further preferably 6.5 or less, or
The pH at 25° C. when the hair cleansing agent is diluted 20 times with water is preferably 6.5 or less, more preferably 6 or less, still more preferably 5.5 or less, and preferably 2 or more. The hair cleansing agent according to any one of the above items <1> to <12>, which is more preferably 3 or more, and further preferably 3.5 or more.
<14> further comprising (D) one or more cationized polysaccharides selected from the group consisting of cationized cellulose and cationized guar gum,
The content of the component (D) in the hair cleansing agent is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and further preferably 0.2% by mass, based on the entire hair cleansing agent. Or more, preferably 2.5% by mass or less, more preferably 1.2% by mass or less, still more preferably 1% by mass or less, in any one of the above items <1> to <13> The described hair cleansing agent.
<15> It is selected from the group consisting of anionic surfactants other than component (A), nonionic surfactants other than component (C), cationic surfactants, amphoteric surfactants, silicones, and other oil agents. Further comprising one or more;
Preferably, an anionic surfactant other than the component (A) is further included;
More preferably, sulfate type anionic surfactants such as alkyl sulfates, alkenyl sulfates, polyoxyalkylene alkyl ether sulfates, polyoxyalkylene alkenyl ether sulfates, sulfoalkyl succinate alkylene alkylphenyl ether sulfates; alkyl sulfosuccinates At least one selected from the group consisting of sulfonic acid type anionic surfactants such as salts, polyoxyalkylene sulfosuccinic acid alkyl ester salts and alkane sulfonates;
More preferably, it contains at least one member selected from the group consisting of polyoxyalkylene alkyl ether sulfates, polyoxyalkylene alkenyl ether sulfates, alkyl sulfates and alkenyl sulfates;
Even more preferably, it contains a polyoxyethylene alkyl ether sulfate represented by the above general formula (10);
Particularly preferred is polyoxyethylene alkyl ether sulfuric acid in which R ¹⁷ in the general formula (10) is an alkyl group having 12 to 14 carbon atoms, v is 0.9 to 4 and M is ammonium or sodium. The hair cleansing agent according to any one of <1> to <14>, which contains a salt.
<16> An anionic surfactant other than the component (A) is further contained, and the content of the anionic surfactant other than the component (A) in the hair cleansing agent is preferably 3% by mass based on the entire hair cleansing agent. Or more, more preferably 5% by mass or more, still more preferably 7% by mass or more, preferably 20% by mass or less, more preferably 18% by mass or less, further preferably 15% by mass or less. The hair cleansing agent according to any one of <1> to <15>.
<17> A pH adjusting agent other than the component (B) is further included, and preferably selected from the group consisting of organic carboxylic acids such as lactic acid, malic acid and citric acid, and bases such as sodium hydroxide, potassium hydroxide and ammonium chloride. The hair cleansing agent according to any one of <1> to <16>, further including one or more of the following.
<18> A method for cleaning hair, which comprises applying the hair cleaning agent according to any one of <1> to <17> to hair, and washing the hair.
<19> A method of suppressing cuticle peeling during hair stretching, which comprises applying the hair cleansing agent according to any one of <1> to <17> to hair and washing the hair.
<20> Hair washing, which comprises applying the hair cleansing agent according to any one of <1> to <17> to hair and washing the hair, and preferably comprising stretching the hair after the washing. How to use the agent.
<21> Use of the hair cleansing agent according to any one of <1> to <17> for suppressing cuticle peeling during hair stretching.
<22> Use of the hair cleansing agent according to any one of <1> to <17>, for producing a cleansing agent that suppresses peeling of cuticle during hair stretching.

(Examples 1 to 15, Comparative Examples 1 to 7)
Shampoos having the compositions shown in Tables 2 and 3 were prepared according to the following method, and the obtained sample solutions were evaluated. The evaluation method and evaluation criteria are shown below.
(Shampoo manufacturing method)
Polyoxyethylene (1) ammonium lauryl sulfate was added to water heated to about 80° C., and the mixture was stirred to make it uniform. Next, the components (B) or (B') and (C) were added to each of them to completely dissolve them, and then the component (D) uniformly dispersed in a part of water was added and dissolved. Then, the component (A) was added and then cooled to room temperature, and the pH was adjusted with sodium hydroxide (25° C.).
In Tables 2 and 3, the shampoo of each example contains water in an amount such that the total of all components is 100% by mass.

(Preparation of hair sample for evaluation)
Two plastic plates with a width of 5.7 cm using 10 g of Japanese hair that has been subjected to beauty treatment (3 treatments with Kaesha Prettier foam bleach hybrid, bath ratio 1:3, treatment time 40 minutes/time) The hair bundle was sandwiched between and fixed with a two-component adhesive to form a hair bundle having a hair length of about 30 cm, and the hair bundle was evaluated according to the following procedure.

(Evaluation method for suppression of hair cuticle peeling)
1. A 20-fold diluted solution of each sample solution obtained in Examples and Comparative Examples was prepared, 300 mL of the solution was placed in a 500 mL beaker, and the above hair bundle was immersed in the solution for 1 minute.
2. Then, add 300 mL of ion-exchanged water to a 500 mL beaker, and add 1. The hair bundle treated in step 1 was put in and rinsed while vibrating up and down for 30 seconds.
3. After that, the hair bundle was taken out of the ion-exchanged water and towel-dried to remove water from the hair bundle.
4. The above operations 1 to 3 were set as one operation for washing hair, and two types of hair bundles, which were subjected to only one operation and a hair bundle in which this operation was repeated 30 times, were prepared as hair samples for evaluation. In addition, in carrying out the evaluation described below, in order to remove the entanglement of hair, 1 g of the following conditioner for evaluation was applied, and after thoroughly rinsing with ion-exchanged water, towel drying and hand-dried operation were performed. Allow to dry for minutes. The prescription of the evaluation conditioner is shown in Table 1 below.

(Evaluation of degree of promoting damage to hair (evaluation of stretched hair))
1. Five hairs were randomly picked up from the hair bundle of the evaluation hair sample that had been subjected to the above-mentioned treatment, and a 10 cm to 15 cm site (hair length 5 cm) was cut from the tip of the hair with a razor. A mending tape (manufactured by Scotch) was sandwiched between the both ends of the cut hair at a position of 0.5 cm so that the hair was sandwiched from above and below to form a fixed part.
Then, the cut-out hair grips this fixing part and pulls in the axial direction of the hair at a speed of 0.1 cm/sec, and the stretching ratio is 25% (from 4 cm to 5 cm before stretching the hair in the tape-unattached portion). Stretching). The drawn hair was fixed on a slide glass with a two-part adhesive so as not to move, and used as a measurement sample.
2. Using the above measurement sample, the hair surface shape was measured with a laser microscope (VK-8700, manufactured by KEYENCE) (measurement pitch: 0.1 μm), and an inclination other than the hair origin that occurred during sample preparation (slide glass or mending) Tape, masking tape, etc.) was used to correct the surface inclination (3 points were designated) on the software. After that, the average height Rc value (JIS B0601:2001) of the roughness curve element which is the JIS standard was calculated. As a calculation method, a straight line having a length of 200 μm was drawn in the axial direction on the hair surface whose inclination was corrected, and the Rc value on the straight line was calculated by software. This operation was performed a total of 5 times on the surface of the randomly selected hair, and the average value was calculated.
It is suggested that the larger the Rc value (μm) is, the rougher the surface shape is, that is, the peeling of the cuticle is promoted, and the smaller this value is, the more the cuticle peeling is suppressed. There is.

(Evaluation of cohesion of dry hair)
The bundle of hair bundles (after beauty treatment, hair washing, and dryer drying) of the evaluation hair sample treated by the above-described method were evaluated by the following method.
1. The widths of the hair bundles at 5 locations of 5 cm, 10 cm, 15 cm, 20 cm, and 25 cm from the root of the hair bundle before the above-mentioned hair washing operation were measured, and the average value was calculated.
2. After that, 1. of the above-mentioned “evaluation method for suppressing hair cuticle peeling”. ~4. After washing the hair once or 30 times in accordance with the procedure of 1., the width of each of the 5 hair bundles was measured in the same manner as above, and the average value thereof was calculated.
3. The difference Δd (cm) in the width of the hair bundle before and after the hair washing treatment was obtained.
Here, the larger Δd means that the width of the hair bundle after the hair washing treatment is wider than that before the hair washing treatment, which means that the cohesion is lost.

(Sensory evaluation: glossy feeling after drying hair)
The glossiness of the hair bundle of the evaluation hair sample treated by the above-described method (beauty treatment, after washing once or 30 times and after drying the hair dryer) was evaluated by 10 professional panelists according to the following criteria, and the total score was obtained. Each was calculated.
+2: There is gloss as compared to Comparative Example +1: There is some gloss as compared to Comparative Example 1 0: The gloss is almost the same as that of Comparative Example 1 -1: There is little gloss as compared to Comparative Example 1. -2: No gloss compared to Comparative Example 1

In all of the evaluation hair samples obtained by washing with the shampoos obtained in Examples 1 to 15, deterioration of the feeling after 30 times treatment was suppressed.
In addition, from Tables 1 and 2, in the hair samples for evaluation obtained by washing with the shampoos obtained in Examples 1 to 15, the Rc values at the time of stretching and lifting after repeating the washing of hair 30 times were compared. It was smaller than the example, and was excellent in the effect of suppressing cuticle peeling. In addition, in the hair samples for evaluation obtained by washing with the shampoo obtained in Examples 1 to 15, the Δd value after repeating the hair washing 30 times is smaller than that of each comparative example, and the hair cohesion is reduced. It was excellent in maintaining effect. Further, in the hair samples for evaluation obtained by washing with the shampoos obtained in Examples 1 to 15, suppression of cuticle peeling after 30 times of washing hair and shine of hair were compared with those of each comparative example. And the balance of the effect of cohesion was excellent.

Claims (5)

See contains the following components (A) ~ (C) and water, the mass ratio of the component (A) wherein for component (B) ((A) / (B)) is 0.3 or more and 50 or less, hair Washing soap.
(A) Ether carboxylate type anionic surfactant represented by the following general formula (1) 0.5% by mass or more and 12% by mass or less R ¹ O—(CH ₂ —CH ₂ O) _s —CH ₂ COOX ¹ (1)
(In the general formula (1), R ¹ represents an alkyl group or an alkenyl group having 10 to 18 carbon atoms, X ¹ represents an alkali metal, alkaline earth metal, ammonium, alkanolamine or a cation derived from a basic amino acid. And s represents a number of 0.5 or more and 10 or less in mass average.)
(B) Succinic acid or its salt 0.1 mass% or more and 5 mass% or less (C) Surfactant represented by the following general formula (2) 0.1 mass% or more and 2 mass% or less R ² O(CH ₂ CH(CH ₃ )O) _u H (2)
(In the general formula (2), R ² represents a linear or branched alkyl group or alkenyl group having 8 to 10 carbon atoms, and u represents a number of 0.5 to 4 in mass average.) The hair cleansing agent according to claim 1, wherein a mass ratio ((B)/(C)) of the component (B) to the component (C) in the hair cleansing agent is 0.05 or more and 40 or less. The hair cleansing agent according to claim 1 or 2 , further comprising (D) one or more cationized polysaccharides selected from the group consisting of cationized cellulose and cationized guar gum. The component (D) has a main chain derived from anhydroglucose represented by the following general formula (5), and the degree of substitution of the cationized ethyleneoxy group is 0.01 or more and 2.5 or less, and propylene The hair cleansing agent according to claim 3 , comprising cationized hydroxypropyl cellulose having a degree of substitution of oxy groups of 0.1 or more and 2.8 or less.

(In the general formula (5), R ⁷ , R ⁸ and R ⁹ each independently represent a substituent having a cationized ethyleneoxy group and a propyleneoxy group represented by the following general formula (6) or (7). , N is the average degree of polymerization of anhydroglucose, and is 50 or more and 5000 or less.)

(In the general formulas (6) and (7), ^one of Y ¹ and Y ² is a hydrogen atom, the other is a cationic group represented by the following general formula (8), and PO is a propyleneoxy group. shown .p the general formula (6) or (7) cationized ethyleneoxy groups contained in the number of ^{(-CH (Y 1) -CH (} Y 2) -O-), q is the general formula ( 6) or (7) represents the number of propyleneoxy groups (-PO-) contained in p and q each independently represent 0 or a positive integer, and when neither p nor q is 0, a cation The addition order of the modified ethyleneoxy group and the propyleneoxy group does not matter, and when p and/or q is 2 or more, it may be either a block bond or a random bond.)

(In the general formula (8), R ¹⁰ , R ¹¹ and R ¹² each independently represent a linear or branched alkyl group having 1 to 3 carbon atoms, and Z ₂ ^— represents an anionic group.) A method for cleaning hair, which comprises applying the hair cleansing agent according to any one of claims 1 to 4 to hair, and washing the hair.