TWI726880B - Hair cleanser - Google Patents

Abstract

The hair cleansing agent of the present invention contains: component (A) specific ether carboxylate type anionic surfactant 0.5 mass% or more and 12 mass% or less, component (B) succinic acid or its salt 0.1 mass% or more and 5 mass% % Or less, and component (C) specific nonionic surfactant 0.1% by mass or more and 2% by mass or less.

Description

Hair cleanser

The present invention relates to a hair washing agent.

Hair is often affected by ultraviolet rays generated by sunlight, heat, dryness, etc., and damage is caused by daily shampooing, combing, and hair dryer heat. In addition, in recent years, people generally freely change the hair color (dyeing, etc.), change the hairstyle (perm, etc.) by chemical treatment, etc., change the appearance of the hair, and dress up as much as possible. It is known that if the frequency of such treatment is increased, it will accumulate damage to the hair, causing the hair to split or break, or the hair tips will become dry.

Specifically, in Patent Document 1 (Japanese Patent Laid-Open No. 2000-327540), it is described that the exfoliation of the stratum corneum during the shampooing process is caused by the swelling of the stratum corneum part due to anionic surfactants and the resulting upward warping. When the hairs rub against each other, a technique to suppress the uplift of the stratum corneum is proposed.

In addition, as a technique for essentially improving hair quality and enhancing the gloss and neatness of hair, a technique using organic dicarboxylic acid has been proposed (Patent Document 2, Japanese Patent Laid-Open No. 2005-239667).

In addition, the following technology is proposed: it uses a sulfate-type anionic surfactant with a specific structure and an ether carboxylate-type surfactant with a specific structure, which has excellent foaming properties and inhibits the stratum corneum of the scalp. It swells and suppresses irritation or itching to the scalp (Patent Document 3, Japanese Patent Laid-Open No. 2010-235523).

In addition, the following technology is proposed: it uses specific anionic surfactants, non-ionic surfactants, and amphoteric surfactants, which are sufficient even under conditions with dirt such as sebum. It foams separately, has excellent detergency, is smooth during foaming and rinsing, and after drying, the hair is smooth, soft, and imparts neatness (Patent Document 4, Japanese Patent Laid-Open No. 2012-1512).

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2000-327540

[Patent Document 2] Japanese Patent Laid-Open No. 2005-239667

[Patent Document 3] Japanese Patent Laid-Open No. 2010-235523

[Patent Document 4] Japanese Patent Laid-Open No. 2012-1512

For consumers who want to change the appearance of their hair, dyeing or perming is a necessity. In daily hair care, combing, blowing, and using a hair iron will exert a stretching force on the hair. If the hair is stretched, upturning of the stratum corneum (upturning) can be observed, which is believed to promote the peeling of the stratum corneum. Therefore, there is a demand for hair cosmetics that can suppress upward warping when the force is applied to stretch the hair and suppress the peeling of the stratum corneum.

Regarding this aspect, Patent Document 1 discloses the following: by allowing a specific acid to act on an anionic surfactant to set a specific pH value, the stratum corneum is suppressed from uplifting and peeling of the stratum corneum is suppressed, but There is room for improvement in that the effect of suppressing upward curling when stretching hair is insufficient.

In addition, in Patent Documents 2 to 4, various hair care effects are also disclosed, but there is no description about the suppression of peeling of the stratum corneum when the hair is stretched, and there is room for improvement in that the effect is insufficient.

The present invention has been completed in view of the actual situation, and provides a hair cleansing composition that can be used in daily hair care activities to suppress hair stretching caused by repeated combing, blowing, and use of hair irons. The peeling of the stratum corneum reduces the deterioration of the touch, or improves the gloss and neatness after treatment.

The inventors of the present invention found that the above problems can be solved by blending specific organic acids and nonionic surfactants into specific anionic surfactants.

According to the present invention, there is provided a hair cleansing agent comprising the following components (A) to (C) and water.

(A) The ether carboxylate type anionic surfactant represented by the following general formula (1) is 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 above general formula (1), R ¹ represents an alkyl group or alkenyl group having a carbon number of 10 or more and 18 or less, and X ¹ represents an alkali metal, alkaline earth metal, ammonium, alkanolamine or basic amino acid Cation, s represents the number of 0.5 or more and 10 or less based on the mass average)

(B) Succinic acid or its salt 0.1% by mass or more and 5% by mass or less

(C) Surfactant represented by the following general formula (2) 0.1% by mass or more and 2% by mass or less R ² O(CH ₂ CH(CH ₃ )O) _u H (2)

(In the above general formula (2), R ² represents a linear or branched alkyl or alkenyl group with a carbon number of 8 or more and 10 or less, and u represents a number of 0.5 or more and 4 or less on a mass average)

In addition, according to the present invention, there is provided a method for washing hair, which includes applying the above-mentioned hair washing agent of the present invention to the hair and rinsing it.

According to the present invention, a hair cleansing composition can be provided, which can inhibit the peeling of the stratum corneum during hair stretching caused by repeated combing, blowing, and use of hair irons in daily hair care activities, and reduce Deterioration of touch, or improvement of gloss and neatness after care.

Hereinafter, the embodiment of the present invention will be described with specific examples of each component. In addition, each component can be used individually or in combination of 2 or more types.

In addition, in this specification, the pH value means the measured value when diluted 20 times at 25°C (glass electrode measurement method).

(Ingredient (A))

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 above general formula (1), R ¹ represents an alkyl group or alkenyl group having a carbon number of 10 or more and 18 or less, and X ¹ represents an alkali metal, alkaline earth metal, ammonium, alkanolamine or basic amino acid Cation, s represents the number of 0.5 or more and 10 or less based on the mass average)

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

In the above general formula (1), as R ¹ , foaming during washing is abundant, and by using the following components (B) and (C) together, it is possible to sufficiently suppress the peeling of the stratum corneum when the hair is stretched. From the viewpoint of the effect, an alkyl group having 12 or more carbon atoms is preferable, and an alkyl group having 16 or less carbon atoms is more preferable.

In addition, in the above general formula (1), from the viewpoint of improving foamability, the average added mole number s of ethylene oxide is 0.5 or more by mass (weight), preferably 1 or more, Moreover, it is 10 or less, Preferably it is 6 or less.

In addition, in the above general formula (1), the counter ion X ¹ includes: derived from alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine Cations; and cations derived from basic amino acids such as arginine and lysine.

Component (A) can be used singly or in combination of two or more, and from the viewpoint of suppressing stratum corneum exfoliation, its content in the hair cleansing agent is 0.5% by mass or more with respect to the entire hair cleansing agent , Preferably 0.7% by mass or more, and 12% by mass or less, more preferably 8% by mass or less. Furthermore, it is more preferable to make it 4 mass% or less from a viewpoint of the solubility in a base agent.

(Ingredient (B))

Next, the component (B) will be described. Component (B) is succinic acid or its salt.

In this embodiment, by combining the component (B) with the component (A) and the following component (C) in the hair cleansing agent, it is possible to effectively suppress the peeling of the stratum corneum during daily hair care activities. . In addition, by combining the components (A) to (C), the hair can be maintained in a healthy state, so that, for example, it can reduce the deterioration of the touch of the hair, or improve the gloss and neatness after treatment.

From the viewpoint of the effect of inhibiting peeling of the stratum corneum during hair stretching or imparting gloss to the hair, the content of the component (B) in the hair cleansing agent is 0.1% by mass or more relative to the entire hair cleansing agent, and it is preferably It is 0.3% by mass or more, more preferably 2% by mass or more, and still more preferably 3% by mass or more. Moreover, from the viewpoint of the stability of the hair cleansing agent, the content of the component (B) relative to the entire hair cleansing agent is 5% by mass or less, preferably 3.5% by mass or less.

(Ingredient (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 above general formula (2), R ² represents a linear or branched alkyl or alkenyl group with a carbon number of 8 or more and 10 or less, and u represents a number of 0.5 or more and 4 or less on a mass average)

In the above general formula (2), from the viewpoint of improving foamability or hair gloss, R ² preferably has a carbon number of 8.

In addition, in the above general formula (2), from the viewpoint of improving the foamability or the gloss of the hair In other words, u is preferably 2 or more and 3.5 or less in mass average.

From the viewpoint of enhancing the foaming property of the hair cleansing agent or the gloss of the hair, the content of the component (C) in the hair cleansing agent is 0.1% by mass or more, preferably 0.5% by mass relative to the entire hair cleansing agent Above, it is more preferably 1% by mass or more. Also, from the viewpoint of reducing the dryness of hair during washing, the content of component (C) is 2% by mass or less, preferably 1.5% by mass or less, and more preferably 1.2% by mass relative to the entire hair cleansing agent. the following.

In addition, in the hair cleansing agent of the present embodiment, it is a viewpoint to balance the effect of suppressing the peeling of the stratum corneum during hair stretching, the improvement of the cleansability of dirt, and the effect of improving the gloss and cleanliness after washing. Specifically, the content ratio (mass ratio) of the components (A), (B), and (C) is preferably as follows.

That is, from the viewpoint of the effect of inhibiting peeling of the stratum corneum during hair stretching, the cleaning of dirt, the gloss after washing, and the improvement of neatness, the component (A) in the hair cleansing agent is relative to the component (B). The mass ratio ((A)/(B)) of) is preferably 0.5 or more, more preferably 0.8 or more, still more preferably 1 or more, more preferably 50 or less, more preferably 20 or less, and still more preferably 15 or less.

In addition, from the viewpoint of the effect of inhibiting the peeling of the stratum corneum during hair stretching, the cleaning of dirt, the gloss after washing, and the improvement of neatness, the component (A) in the hair cleansing agent is relative to the component (C The mass ratio ((A)/(C)) of) is preferably 0.8 or more, more preferably 2 or more, still more preferably 3 or more, more preferably 45 or less, more preferably 10 or less, and still more preferably 8 or less.

In addition, from the viewpoint of the effect of inhibiting peeling of the stratum corneum during hair stretching, the cleaning of dirt, the gloss after washing, and the improvement of neatness, the component (B) in the hair cleansing agent is relative to the component (C). The mass ratio ((B)/(C)) of) is preferably 0.05 or more, more preferably 0.3 or more, still more preferably 1 or more, more preferably 40 or less, more preferably 10 or less, and still more preferably 6 or less.

The hair cleansing agent of this embodiment is more specifically an aqueous hair cleansing agent.

That is, the hair cleansing agent of this 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 remainder obtained by removing components other than water in the hair cleansing agent. Moreover, the content of water is preferably 50% by mass or more, and more preferably 60% by mass or more with respect to the entire hair cleansing agent. Moreover, it is preferably 98% by mass or less, and more preferably 95% by mass or less.

Next, the pH value of the hair cleansing agent will be described.

In the hair cleansing agent of this embodiment, the succinic acid of the component (B) has a viewpoint of maximizing the effect of inhibiting stratum corneum peeling when stretching hair, when diluted with water 20 times at 25°C The pH value is preferably 10 or less, more preferably 9.6 or less, and still more preferably 6.5 or less. In addition, from the viewpoint of the decontamination performance of the hair cleansing agent, the pH value is 6.5 or less, preferably 6 or less, and more preferably 5.5 or less. In addition, from the same viewpoint as the above, the pH value is preferably 2 or more, more preferably 3 or more, and still more preferably 3.5 or more.

In addition, in this embodiment, the hair cleansing agent may contain components other than the above-mentioned components.

For example, the hair cleansing agent may also contain the following component (D).

(D) One or more cationized polysaccharides selected from the group consisting of cationized cellulose and cationized guar gum

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

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

(In the above general formula (4), R'and R" each independently represent an alkylene group having 2 or 3 carbon atoms, b is an integer from 0 to 10, c is an integer from 0 to 3, d It is an integer of 0 or more and 10 or less, R''' is an alkylene or hydroxyalkylene having 1 or more and 3 or less carbon atoms, R ⁴ , R ⁵ and R ^{6 are the} same or different, and represent an alkane having 10 or less carbon atoms Group, aryl group, or aralkyl group, or may also contain the nitrogen atom in the formula to form a heterocyclic ring, and Z ₁ represents a monovalent anion (chlorine, bromine, iodine, sulfuric acid, sulfonic acid, methyl sulfuric acid, phosphoric acid, nitric acid Wait))

The cationic substitution degree of the cationized cellulose represented by the above general formula (3) is preferably 0.01 or more and 1 or less. That is, in the above general formula (4), the average value of c per anhydroglucose unit is preferably 0.01 or more and 1 or less, more preferably 0.02 or more and 0.5 or less. In addition, the total of b+d is preferably 1 or more and 3 or less on average. Furthermore, in terms of reaction yield, the degree of substitution is preferably 1 or less.

For example, as R ⁴ , R ⁵ and R ⁶ , all of them are preferably 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 number of 10 Long-chain alkyl groups above and below 20. The molecular weight of the cationized cellulose used here is preferably about 100,000 or more and 8,000,000 or less.

Commercial products of cationized cellulose include POIZ C-60H (manufactured by Kao Corporation), POIZ C-80H (manufactured by Kao Corporation), Caticello L-150 (manufactured by Kao Corporation), Polymer JR-400 (Dow Chemical Company manufacturing) and so on.

In addition, the component (D) may also include a main chain derived from anhydroglucose represented by the following general formula (5), and the degree of substitution of the cationized ethylene oxide group is 0.01 or more and 2.5 or less. Cationized hydroxypropyl cellulose having a degree of substitution of the group from 0.1 to 2.8.

(In the above general formula (5), R ⁷ , R ⁸ and R ⁹ each independently represent the following general formula (6) or (7) represented by the cationized ethoxylated and propoxylated substituents Base, n represents the average degree of polymerization of anhydroglucose, which is 50 or more and 5000 or less)

(In the above general formulas (6) and (7), one of Y ¹ and Y ² is a hydrogen atom, the other represents a cationic group represented by the following general formula (8), and PO represents a propoxyl group ; P represents the number of cationized ethoxy groups (-CH(Y ¹ )-CH(Y ² )-O-) contained in the general formula (6) or (7), and q represents the general formula (6) or (7) The number of propoxylate groups (-PO-) contained in p and q are each independently 0 or a positive integer; when both p and q are not 0, the cationized ethoxylate group and The order of addition of propoxyl groups is arbitrary, and when p and/or q is 2 or more, either block bonding or random bonding is acceptable)

[化5]

(In the above general formula (8), R ¹⁰ , R ¹¹ and R ¹² each independently represent a linear or branched alkyl group having a carbon number of 1 or more and 3 or less, and Z ₂ ^- represents an anionic group)

In addition, in the component (D), the cationized guar gum is preferably represented by the following general formula (9).

(In the above general formula (9), D represents a guar gum residue, R ¹³ represents an alkylene group or a hydroxy alkylene group, and R ¹⁴ , R ¹⁵ and R ^{16 are the} same or different, and represent an alkyl group with a carbon number of 10 or less , Aryl, or aralkyl, or can also contain the nitrogen atom in the formula to form a heterocyclic ring, Z ₃ ^- represents an anion (chlorine, bromine, iodine, sulfuric acid, sulfonic acid, methyl sulfuric acid, phosphoric acid, etc.), and f Represents a positive integer)

The cationic 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 cationic groups are introduced into one sugar unit. This type of cationic polymer is described in Japanese Patent Publication No. 58-35640, Japanese Patent Publication No. 60-46158, and Japanese Patent Application Publication No. 58-53996. For example, as a commercially available product, examples include: Jaguar C-13C, Jaguar C-14SK, etc. are commercially available under the trade name Jaguar by Rhodia Inc. (Rhodia Inc.). In addition, Rhaball Gum CG-M manufactured by Sumitomo Pharmaceutical Co., Ltd. can be cited.

From the viewpoint of improving the combability during washing or the neatness of the hair after drying, the content of ingredient (D) in the hair cleanser is preferably 0.01 quality relative to the whole hair cleanser. The amount is more than %, more preferably 0.1% by mass or more, and still more preferably 0.2% by mass or more. In addition, from the viewpoint of making the viscosity of the cleaning base better, the content of the component (D) relative to the entire hair cleaning agent is preferably 2.5% by mass or less, more preferably 1.2% by mass or less, and further Preferably it is 1 mass% or less.

In order to improve the cleansing performance and obtain the desired effects in terms of care after drying, the hair cleansing agent of this embodiment may further contain anionic surfactants other than component (A), in addition to component (C) Nonionic surfactants, cationic surfactants, amphoteric surfactants, silicones, other oils, etc.

Among them, specific examples of anionic surfactants other than component (A) include alkyl sulfates, alkenyl sulfates, polyoxyalkylene alkyl ether sulfates, and polyoxyalkylene alkenyl ethers. Sulfate-type anionic surfactants such as sulfate, alkylene sulfosuccinate sulfate; alkyl sulfosuccinate, alkyl polyoxyalkylene sulfosuccinate, alkylsulfonate Sulfonic acid anionic surfactants such as acid salts. Among them, preferred are polyoxyalkylene alkyl ether sulfates, polyoxyalkylene ether sulfates, alkyl sulfates, and alkenyl sulfates. Among them, polyoxyalkylene alkyl ether sulfates Preferably, it is a polyoxyethylene alkyl ether sulfate represented by the following general formula (10).

R ¹⁷ O(CH ₂ CH ₂ O) _v SO ₃ M (10)

(In the above general formula (10), R ¹⁷ represents an alkyl or alkenyl group with a carbon number of 10 or more and 18 or less, and M represents a cation derived from alkali metal, alkaline earth metal, ammonium, alkanolamine or basic amino acid , V is the average number of added moles of ethylene oxide, which means the number of 0.5 or more and less than 5 based on the average mass)

Among them, from the viewpoint of achieving both rapid foaming properties and good foam touch, R ¹⁷ in the general formula (10) is preferably an alkyl group having 12 or more and 14 or less carbon atoms. Moreover, the average added molar number v of ethylene oxide is preferably 0.9 or more and 4 or less, more preferably 1 or more and 3 or less. More preferably, M is ammonium or sodium polyoxyethylene alkyl ether sulfate.

From the viewpoint of further improving the foamability, the anion world except for component (A) The content of the surfactant is preferably 3% by mass or more with respect to the entire hair cleansing agent, more preferably 5% by mass or more, and still more preferably 7% by mass or more. In addition, from the viewpoints of improving defoaming properties and suppressing residual feeling during rinsing, the content of anionic surfactants other than component (A) is preferably 20% by mass or less with respect to the entire hair cleanser, and more preferably 18% by mass or less, more preferably 15% by mass or less.

In addition, a pH adjusting agent other than the above-mentioned component (B) may be formulated to the hair cleansing agent of this embodiment. Examples of such a pH adjusting agent include organic acids other than the above-mentioned component (B), and organic carboxylic acids such as lactic acid, malic acid, and citric acid may also be used. In addition, as other pH adjusting agents, alkalis such as sodium hydroxide, potassium hydroxide, and ammonium chloride may also be used in combination with these organic acids.

In the hair cleansing agent of this embodiment, in addition to the above-mentioned components, the components used in normal hair cleansing agents can be appropriately formulated according to the desired effect. Examples of such optional ingredients include anti-dandruff agents, vitamins, fungicides, anti-inflammatory agents (glycyrrhizic acid, glycyrrhetic acid, and derivatives thereof), preservatives, chelating agents, and moisturizers (sorbitol, Panthenol, etc.), colorants (dyes, pigments, etc.), extracts (polar solvent extracts of eucalyptus, proteins or their hydrolysates obtained from shells or pearls with nacre, obtained from honey, royal jelly, and silk The protein or its hydrolysate, the protein-containing extract obtained from the seeds of legumes, ginseng extract, rice germ extract, fucus extract, aloe vera extract, lotus extract, pomegranate extract, wild rose Extract, bergamot extract, licorice extract, moon peach leaf extract, green algae extract, etc.), pearlescent agents such as titanium oxide, fragrances, ultraviolet absorbers, antioxidants, shea butter, rose water, sweet orange oil , Eucalyptus oil, etc.

The hair cleansing agent of this embodiment is manufactured by mixing components (A) to (C) appropriately with other components and dissolving them in water, for example. Specifically, the components (B) and (C) are added to water heated to about 70 to 100°C and stirred to dissolve them. Furthermore, after adding a component (A), stirring it and making it uniform, it cools to room temperature, and is obtained by it. Furthermore, when other surfactants are included, it is necessary to mix and homogenize at any time during the heating period. However, for example, it is preferable to add other surfactants in addition to the components (A) and (C) in water heated to about 70-100° C., and stir to make it uniform. After that, the components (B) and (C) are added and stirred to dissolve them, and the component (A) is added, stirred to make it uniform, and then cooled to 30°C or less. The pH adjustment with acids and bases other than the component (B) is preferably performed at 40°C or lower. When the component (D) is included, it can be added at any time as long as the water is heated to about 70-100°C. It is preferably added before the component (A) is added to dissolve or uniformly disperse it. .

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

In addition, the method of washing hair using the hair washing agent of this embodiment includes, for example, applying the hair washing agent to the hair and rinsing it.

In the hair cleansing agent of this embodiment, since the components (A) to (C) are used in combination, peeling of the stratum corneum can be suppressed. For example, it can suppress the peeling of the stratum corneum that occurs when the hair is pulled by heating devices such as combing, blowing, or using a hair iron in daily hair care activities, so the hair can also be maintained in a healthy state. In addition, by using the hair cleansing agent of this embodiment, it is also possible to reduce the deterioration of the touch, or to improve the gloss and neatness after treatment.

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 may be adopted.

Regarding the above-described embodiments, the preferred aspects of the present invention will be further disclosed below.

<1> A hair cleanser comprising the following components (A) to (C) and water.

(A) The ether carboxylate type anionic surfactant represented by the following general formula (1) is 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 above general formula (1), R ¹ represents an alkyl or alkenyl group with a carbon number of 10 or more and 18 or less, and X ¹ represents an alkali metal, alkaline earth metal, ammonium, alkanolamine or basic amino acid Cation, s represents the number of 0.5 or more and 10 or less on a mass average).

(B) Succinic acid or its salt 0.1% by mass or more and 5% by mass or less

(C) Surfactant represented by the following general formula (2) 0.1% by mass or more and 2% by mass or less R ² O(CH ₂ CH(CH ₃ )O) _u H (2)

(In the above general formula (2), R ² represents a linear or branched alkyl or alkenyl group having a carbon number of 8 or more and 10 or less, and u represents a number of 0.5 or more and 4 or less on a mass average).

<2> The hair cleansing agent as described in the above <1>, wherein the mass ratio ((A)/(B)) of the above-mentioned component (A) to the component (B) in the hair cleansing agent is preferably 0.5 or more, more preferably 0.8 or more, more preferably 1 or more, more preferably 50 or less, more preferably 20 or less, and still more preferably 15 or less.

<3> The hair cleansing agent as described in the above <1> or <2>, wherein the mass ratio of the above-mentioned 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, still more preferably 1 or more, more preferably 40 or less, more preferably 10 or less, and still more preferably 6 or less.

<4> The hair cleansing agent as described in any one of the above <1> to <3>, which further includes (D) one selected from the group consisting of cationized cellulose and cationized guar gum The above cationized polysaccharide; preferably comprising a cationized cellulose represented by the above general formula (3) and the following general formula (5) and a cationized guar gum represented by the above general formula (9) More than 1 species in the group; more preferably, it contains selected from POIZ C-60H, POIZ C-80H, Caticello L-150, Polymer JR-400, Jaguar C-13C, Jaguar C-14SK and Rhaball Gum CG-M One or more species in the group.

<5> The hair cleansing agent as described in the above <4>, wherein the component (D) contains a main chain derived from anhydroglucose represented by the following general formula (5), and cationized ethylene oxide Cationized hydroxypropyl cellulose having a degree of substitution of oxy groups of 0.01 or more and 2.5 or less, and a degree of substitution of propyleneoxy groups of 0.1 or more and 2.8 or less.

(In the above general formula (5), R ⁷ , R ⁸ and R ⁹ each independently represent the following general formula (6) or (7) represented by the cationized ethoxylated and propoxylated substituents Base, n represents the average degree of polymerization of anhydroglucose, which is 50 or more and 5000 or less).

(In the above general formulas (6) and (7), one of Y ¹ and Y ² represents a hydrogen atom, the other represents a cationic group represented by the following general formula (8), and PO represents a propoxyl group ; P represents the number of cationized ethoxy groups (-CH(Y ¹ )-CH(Y ² )-O-) contained in the general formula (6) or (7), and q represents the general formula (6) or (7) The number of propoxylate groups (-PO-) contained in p and q are each independently 0 or a positive integer; when both p and q are not 0, the cationized ethoxylate group and The order of addition of propoxyl groups is arbitrary, and when p and/or q is 2 or more, either block bonding or random bonding may be used).

(In the above general formula (8), R ¹⁰ , R ¹¹ and R ¹² each independently represent a linear or branched alkyl group having a carbon number of 1 or more and 3 or less, and Z ₂ ^- represents an anionic group).

<6> The hair cleansing agent as described in any one of the above <1> to <5>, wherein in the component (A), R ¹ in the above general formula (1) is preferably a carbon number of 12 or more Alkyl group is preferably an alkyl group having 16 or less carbon atoms; s in the above general formula (1) is preferably 1 or more, and more preferably 6 or less; X ¹ in the above general formula (1) is more Preferably derived from alkali metals selected from the group consisting of sodium and potassium; alkaline earth metals selected from the group consisting of calcium and magnesium; ammonium; selected from the group consisting of monoethanolamine, diethanolamine and triethanolamine Alkanolamine cations; and cations derived from basic amino acids selected from the group consisting of arginine and lysine.

<7> The hair cleansing agent as described in any one of the above <1> to <6>, wherein the content of the component (A) in the hair cleansing agent is preferably 0.5% by mass relative to the entire hair cleansing agent Above, it is more preferably 0.7% by mass or more, more preferably 12% by mass or less, more preferably 8% by mass or less, and still more preferably 4% by mass or less.

<8> The hair cleansing agent as described in any one of the above <1> to <7>, wherein the content of the component (B) in the hair cleansing agent is preferably 0.1% by mass relative to the entire hair cleansing agent Above, it is more preferably 0.3% by mass or more, still more preferably 2% by mass or more, still more preferably 3% by mass or more, more preferably 5% by mass or less, and more preferably 3.5% by mass or less.

<9> The hair cleansing agent as described in any one of the above <1> to <8>, wherein in the component (C), ^{the carbon number of R 2 in} the above general formula (2) is preferably 8; The u of the general formula (2) is preferably 2 or more and 3.5 or less on a mass average.

<10> The hair cleansing agent as described in any one of the above <1> to <9>, wherein the content of the component (C) in the hair cleansing agent is preferably 0.1% by mass relative to the entire hair cleansing agent Above, it is more preferably 0.5% by mass or more, still more preferably 1% by mass or more, more preferably 2% by mass or less, more preferably 1.5% by mass or less, and still more preferably 1.2% by mass or less.

<11> The hair cleansing agent described in any one of <1> to <10> above, which The mass ratio ((A)/(C)) of the component (A) to the component (C) in the middle hair cleansing agent is preferably 0.8 or more, more preferably 2 or more, and still more preferably 3 or more, and, It is preferably 45 or less, more preferably 10 or less, and still more preferably 8 or less.

<12> The hair cleansing agent as described in any one of the above <1> to <11>, wherein the content of water in the hair cleansing agent is preferably obtained by removing components other than water in the hair cleansing agent The remainder is more preferably 50% by mass or more, still more preferably 60% by mass or more, more preferably 98% by mass or less, and still more preferably 95% by mass or less with respect to the entire hair cleansing agent.

<13> The hair cleansing agent as described in any one of the above <1> to <12>, wherein the pH value at 25°C when the hair cleansing agent is diluted to 20 times with water is preferably 10 or less, It is more preferably 9.6 or less, still more preferably 6.5 or less, or the pH value at 25° C. when the hair cleanser is diluted to 20 times with water is preferably 6.5 or less, more preferably 6 or less, and even more preferably 5.5 Hereinafter, it is more preferably 2 or more, more preferably 3 or more, and still more preferably 3.5 or more.

<14> The hair cleansing agent as described in any one of the above <1> to <13>, which further includes (D) one selected from the group consisting of cationized cellulose and cationized guar gum For the above cationized polysaccharide, 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 still more preferably 0.2% by mass or more, relative to the entire hair cleansing agent, Furthermore, it is preferably 2.5% by mass or less, more preferably 1.2% by mass or less, and still more preferably 1% by mass or less.

<15> The hair cleansing agent described in any one of the above <1> to <14>, which further comprises anionic surfactants other than component (A), and nonionic other than component (C) One or more of surfactants, cationic surfactants, amphoteric surfactants, silicones, and other oil agents; preferably, they further include anionic surfactants other than component (A); More preferably, it contains selected from the group consisting of alkyl sulfates, alkenyl sulfates, polyoxyalkylene alkyl ether sulfates, polyoxyalkylene ether sulfates, and sulfosuccinic alkylene phenyl ether sulfates. Sulfate type anionic surfactants such as salt; Alkyl sulfosuccinate, alkyl polyoxyalkylene sulfosuccinate and alkane sulfonate and other sulfonic acid type anionic surfactants One or more of; more preferably, it contains 1 selected from the group consisting of polyoxyalkylene alkyl ether sulfate, polyoxyalkylene alkenyl ether sulfate, alkyl sulfate, and alkenyl sulfate the above species; more preferably further comprising the general formula (10) polyoxyethylene alkyl ether sulfate represented by the; particularly preferably comprise the general formula (10) in the carbon number of R ¹⁷ is 12 or more and 14 or less of alkyl Group, v is 0.9 or more and 4 or less, and M is polyoxyethylene alkyl ether sulfate of ammonium or sodium.

<16> The hair cleansing agent as described in any one of the above <1> to <15>, which further contains an anionic surfactant other than the component (A), and the hair cleansing agent except for the component (A) The content of other anionic surfactants is preferably 3% by mass or more, more preferably 5% by mass or more, still more preferably 7% by mass or more, and more preferably 20% by mass or less with respect to the entire hair cleansing agent. It is more preferably 18% by mass or less, and still more preferably 15% by mass or less.

<17> The hair cleansing agent as described in any one of the above <1> to <16>, which further includes a pH adjuster other than component (B), preferably further includes selected from lactic acid and malic acid One or more of the group consisting of organic carboxylic acids such as citric acid, sodium hydroxide, potassium hydroxide, and ammonium chloride.

<18> A method for washing hair, comprising applying the hair washing agent as described in any one of the above <1> to <17> to the hair, and rinsing it.

<19> A method for inhibiting peeling of the stratum corneum when hair is stretched, which comprises applying the hair cleansing agent as described in any one of <1> to <17> to the hair, and rinsing the hair.

<20> A method of using hair cleansing agent, which includes the steps of <1> to < 17> The hair cleansing agent described in any one is applied to the hair and rinsed, preferably including stretching the hair after the above-mentioned rinsing.

<21> A use of the hair cleansing agent as described in any one of the above <1> to <17>, which is used to inhibit the peeling of the stratum corneum when the hair is stretched.

<22> A use of the hair cleansing agent as described in any one of the above <1> to <17>, which is used to produce a cleansing agent that inhibits stratum corneum peeling when stretching hair.

[Example]

(Examples 1 to 15, Comparative Examples 1 to 7)

Shampoos with the compositions shown in Table 2 and Table 3 were prepared according to the following methods, and the obtained sample solutions were evaluated. The evaluation methods and evaluation criteria are shown below.

(How to make shampoo)

Add polyoxyethylene (1) ammonium lauryl sulfate to water heated to about 80°C, and stir to make it uniform. Then, after the components (B) or (B') and (C) are respectively added thereto and completely dissolved, a part of the component (D) uniformly dispersed in water is added and dissolved. Then, after adding the component (A), it cooled to room temperature, and the pH value was adjusted with sodium hydroxide (25 degreeC).

In Table 2 and Table 3, the shampoo of each example contains water in such an amount that the total of all ingredients becomes 100% by mass.

(Making of hair samples for evaluation)

Use 10g of Japanese hair that has undergone beauty treatment (prettia foam bleaching agent manufactured by Kao Corporation is highly bleached for 3 times, bath ratio is 1:3, treatment time is 40 minutes/time), and the hair is clamped in 2 horizontal widths Between the 5.7cm plastic plates and fix them with a 2-agent adhesive to make hair bundles with a hair length of about 30cm, the hair bundles are evaluated according to the following procedures.

(Evaluation method for inhibiting hair cuticle peeling)

1. Make a 20-fold diluted solution of each sample solution obtained in the examples and comparative examples, pour 300 mL of the solution into a 500 mL beaker, and perform 1 Minute immersion treatment.

2. After that, pour 300 mL of ion-exchanged water into a 500 mL beaker, put the hair bundle treated in 1. into it, and wash it while shaking it up and down for 30 seconds.

3. After that, the hair bundle is taken out of the ion-exchanged water, dried with a towel, and the water is removed from the hair bundle.

4. Set the operations 1 to 3 above as one shampooing operation, and make two types of hair tufts with only one operation and 30 repeated operations as hair samples for evaluation. Furthermore, in order to untie the tangles of the hair when performing the following evaluation, apply 1g of the following evaluation conditioner, rinse thoroughly with ion-exchanged water, dry it with a towel, comb and dry it with a hair dryer. 3 minutes. The formula of the conditioner for evaluation is shown in Table 1 below.

(Evaluation of hair damage promotion (evaluation of stretched hair))

1. Randomly pick 5 hairs from the hair bundle of the hair sample for evaluation that has undergone the above-mentioned treatment, and use a razor to cut the part 10cm~15cm away from the tip of the hair (hair length 5cm). The invisible tape (manufactured by Scotch) was attached to the 0.5 cm portion of both ends of the cut hair by clamping it from top to bottom and set it as a fixed part.

And, the fixed part is held and the stretching speed along the axis of the hair becomes 0.1cm/ Second, the stretch rate becomes 25% (stretch the cut hair from 4cm before stretching to 5cm without the tape attached). The stretched hair is fixed on the glass slide so that it does not move using a two-part adhesive, and it is used as a sample for measurement.

2. Using the above-mentioned sample for measurement, use a laser microscope (manufactured by KEYENCE, VK-8700) to measure the shape of the hair surface (measurement pitch: 0.1μm). (Producers of glass slides, invisible tape, shading tape, etc.) perform surface slope correction on the software (specify 3 points). Thereafter, calculate the average height Rc value of the roughness curve elements of the JIS standard (JIS B0601: 2001). As a calculation method, draw a straight line with a length of 200μm along the axis of the hair surface that has been subjected to slope correction before, and calculate the Rc value on the straight line on the software. Perform this operation on the randomly selected hair surface for a total of 5 times, and find the average value.

The larger the Rc value (μm), the rougher the surface shape, that is, the more accelerated the peeling of the stratum corneum, and the smaller the value, the more suppressed the peeling of the stratum corneum.

(Evaluation of the neatness of dry hair)

The tidiness of the hair tufts (after cosmetic treatment, shampoo, and dryer drying) of the hair sample for evaluation treated by the above method was evaluated by the following method.

1. Measure the width of the hair bundles at 5 cm, 10 cm, 15 cm, 20 cm, and 25 cm from the root of the hair bundle before the above shampooing operation, and calculate the average value.

2. After that, perform 1 or 30 shampooing operations in accordance with the procedures of 1.~4. of the above-mentioned "Evaluation Method for Inhibiting Hair Cuticle Peeling", and then adjust the width of the 5 hair bundles in the same manner as above. Perform the measurement and calculate the average value.

3. Calculate the difference Δd (cm) between the width of hair bundles before and after shampooing.

Here, the larger Δd is, the wider the horizontal width of the hair bundle after shampooing treatment is compared with that before shampooing treatment, which means that the uniformity is lost.

(Sensory evaluation: gloss after drying hair)

Ten professional inspectors will examine the evaluation wool that has been processed by the above methods. The glossiness of the hair tufts of the hair samples (after cosmetic treatment, 1 or 30 times shampooing, and hair dryer drying) was evaluated according to the following criteria, and their total scores were calculated respectively.

+2: Luster compared to Comparative Example 1

+1: Slightly shiny compared to Comparative Example 1

0: The gloss is almost the same as that of Comparative Example 1

-1: Slightly dull compared to Comparative Example 1

-2: Lusterless compared to Comparative Example 1

In the hair samples for evaluation obtained by washing with the shampoos obtained in Examples 1 to 15, the deterioration of the touch after 30 treatments was suppressed.

In addition, according to Table 1 and Table 2, in the hair samples for evaluation obtained by washing with the shampoos obtained in Examples 1-15, the Rc value when the hair is stretched and upturned after 30 times of repeated shampooing is less than The value of each comparative example has an excellent effect of suppressing peeling of the stratum corneum. In addition, in the hair samples for evaluation obtained by washing with the shampoos obtained in Examples 1-15, the Δd value after 30 repeated shampooing was lower than the value of each comparative example, and the tidiness of the hair was maintained. The effect is excellent. In addition, in the hair samples for evaluation obtained by washing with the shampoos obtained in Examples 1-15, compared with the comparative examples, the stratum corneum peeling was suppressed and the hair was repeatedly shampooed 30 times. The balance of the effect of gloss and neatness is excellent.

Claims (6)

A hair cleansing agent comprising the following components (A) to (C) and water, (A) the ether carboxylate type anionic surfactant represented by the following general formula (1) 0.5% by mass or more and 12% by mass The following R ¹ O-(CH ₂ -CH ₂ O) _s -CH ₂ COOX ¹ (1) (in the above general formula (1), R ¹ represents an alkyl group with a carbon number of 12 or more and 16 or less, and X ¹ represents the source Cation from alkali metal, alkaline earth metal, ammonium, alkanolamine or basic amino acid, s represents the number of 2.6 or more and 10 or less by mass average) (B) Succinic acid or its salt 0.1% by mass or more and 5 mass % Or less (C) The surfactant represented by the following general formula (2) is 0.1% by mass or more and 2% by mass or less R ² O(CH ₂ CH(CH ₃ )O) _u H (2) (in the above general formula In (2), R ² represents a linear or branched alkyl or alkenyl group having a carbon number of 8 or more and 10 or less, and u represents a number of 2 or more and 3.5 or less on a mass average). The hair cleansing agent of claim 1, wherein the mass ratio ((A)/(B)) of the above-mentioned component (A) to the above-mentioned component (B) in the hair cleansing agent is 0.5 or more and 50 or less. The hair cleansing agent of claim 1, wherein the mass ratio ((B)/(C)) of the above-mentioned component (B) to the above-mentioned component (C) in the hair cleansing agent is 0.05 or more and 40 or less. The hair cleansing agent of claim 1, further comprising (D) one or more cationized polysaccharides selected from the group consisting of cationized cellulose and cationized guar gum. The hair cleansing agent of claim 4, wherein the above-mentioned component (D) contains a main chain derived from anhydroglucose represented by the following general formula (5), and the degree of substitution of the cationized ethoxylate is 0.01 or more and 2.5 or less, cationized hydroxypropyl cellulose with a degree of substitution of propoxyl groups of 0.1 or more and 2.8 or less, [Chemical 1]

(In the above general formula (5), R ⁷ , R ⁸ and R ⁹ each independently represent the following general formula (6) or (7) represented by the cationized ethoxylated and propoxylated substituents Base, n represents the average degree of polymerization of anhydroglucose, which is 50 or more and 5000 or less)

(In the above general formulas (6) and (7), one of Y ¹ and Y ² represents a hydrogen atom, the other represents a cationic group represented by the following general formula (8), and PO represents a propoxyl group ; P represents the number of cationized ethoxy groups (-CH(Y ¹ )-CH(Y ² )-O-) contained in the general formula (6) or (7), and q represents the general formula (6) or (7) The number of propoxylate groups (-PO-) contained in p and q are each independently 0 or a positive integer; when both p and q are not 0, the cationized ethoxylate group and The order of addition of propoxyl groups is arbitrary, and when p and/or q is 2 or more, it can be either block bonding or random bonding)

(In the above general formula (8), R ¹⁰ , R ¹¹ and R ¹² each independently represent a linear or branched alkyl group having a carbon number of 1 or more and 3 or less, and Z ₂ ^- represents an anionic group). A method for washing hair, which comprises applying the hair washing agent according to any one of claims 1 to 5 to the hair and rinsing it.