Hair cleansing agent

Abstract

To provide a hair cleansing agent that offers superior usability as the hair cleansing agent, reduces negative impacts on the efficacy of follow-up treatments, and reduces the risk of color fading in dyed hair.SOLUTION: A hair cleansing agent comprises: an amino propionic acid-type ampholytic surfactant (A1) 0.1-5 mass%; an ampholytic surfactant (A2) not classified as aminopropionic acid-type; and an anionic surfactant (B), where the mass ratio between (A1) and (A2), (A1) / (A2), is 1-9, and the total of (A1), (A2) and (B) is 7-25 mass%.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a hair cleansing agent. [Background technology]

[0002] Nowadays, hair dyeing is widely used to hide gray hair and as a fashion statement. Hair dye users have a strong desire for the color to last as long as possible. In recent years, bright, high-tone hair colors have become popular, but this type of hair has the disadvantage of fading easily after dyeing, so hair dyes are required to have good color retention. Since fading of dyed hair is largely caused by washing, technical studies have been conducted for some time to develop hair washes that cause less fading (Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-252733 A [Patent Document 2] JP 2020-97545 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, hair cleansing products with little fading have drawbacks such as poor foaming, which results in an unsatisfactory feel when used, or a negative effect on the treatment used thereafter, and there are few hair cleansing products on the market that satisfy all of the following requirements: good feel when used as a hair cleanser, minimal negative effect on the treatment, and minimal fading. Therefore, an object of the present invention is to provide a hair wash which has an excellent feel when used as a hair wash, has little adverse effect on the effect of a treatment used thereafter, and causes little fading when used on dyed hair. [Means for solving the problem]

[0005] The present inventors have conducted extensive research to solve the above problems, and as a result have found that the above problems can be solved by providing the following configuration, which has led to the completion of the present invention. The present invention relates to, for example, the following items [1] to [8]. [1] 0.1 to 5 mass% of an aminopropionic acid type amphoteric surfactant (A1), an amphoteric surfactant (A2) other than an aminopropionic acid type; and an anionic surfactant (B), the mass ratio (A1) / (A2) of (A1) to (A2) is 1 to 9; A hair wash, in which the total amount of (A1), (A2) and (B) is 7 to 25% by mass. [2] The hair wash according to [1], wherein a mass ratio of the sum of (A1) and (A2) to (B), ((A1)+(A2)) / (B), is 1 / 10 to 1. [3] The hair wash according to [1] or [2], further comprising one or more components (C) selected from the group consisting of cationic polymers and silicone oils. [4] The hair wash according to any one of [1] to [3], wherein the (A1) is sodium β-laurylaminopropionate. [5] The hair wash according to any one of [1] to [4], wherein (A2) is an amidopropyl betaine type amphoteric surfactant. [6] The hair wash according to any one of [1] to [5], wherein (B) is one or more members selected from the group consisting of N-acylamino acid salts, N-acylmethyltaurine salts, and polyoxyethylene alkyl ether carboxylic acids or salts thereof. [7] The hair wash according to [3], comprising 0.05 to 1.0% by mass of the component (C). [8] The hair wash according to [3] or [4], wherein the component (C) is one or more members selected from the group consisting of cationic cellulose and cationic guar gum. Effect of the Invention

[0006] According to the present invention, it is possible to provide a hair wash that has an excellent feel when used as a hair wash, has little adverse effect on the effect of a treatment used thereafter, and causes little fading when used on dyed hair. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Next, the present invention will be described in detail. Unless otherwise specified, the expression "A to B" regarding a numerical range means from A to B. Additionally, % means mass %.

[0008] <Hair cleansing agent> The hair wash of the present invention contains 0.1 to 5 mass% of an aminopropionic acid type amphoteric surfactant (A1), a non-aminopropionic acid type amphoteric surfactant (A2), and an anionic surfactant (B), wherein the mass ratio of (A1) to (A2), (A1) / (A2), is 1 to 9, and the total of (A1), (A2) and (B) is 7 to 25 mass%.

[0009] <Aminopropionic acid type amphoteric surfactant (A1)> The aminopropionic acid type amphoteric surfactant (A1) (hereinafter, also referred to as component (A1)) is an aminopropionic acid type amphoteric surfactant represented by the following general formula (1). R-NHCH2CH2COOM1...Formula (1) (In the formula, R represents an alkyl group having 6 to 20 carbon atoms, and M1 represents a hydrogen atom, a sodium atom, a potassium atom, or triethanolamine.)

[0010] Examples of the aminopropionic acid type amphoteric surfactant (A1) include sodium β-hexylaminopropionate, sodium β-heptylaminopropionate, sodium β-octylaminopropionate, sodium β-isooctylaminopropionate, sodium β-2-ethylhexylaminopropionate, sodium β-nonylaminopropionate, sodium β-isononylaminopropionate, sodium β-decylaminopropionate, sodium β-isodecylaminopropionate, sodium β-undecylaminopropionate, sodium β-laurylaminopropionate (sodium β-dodecylaminopropionate), potassium β-laurylaminopropionate (potassium β-dodecylaminopropionate), and sodium β-lauryaminopropionate. triethanolamine beta-dodecylaminopropionate (triethanolamine beta-dodecylaminopropionate), sodium beta-coco alkylaminopropionate, triethanolamine beta-coco alkylaminopropionate, sodium beta-isododecylaminopropionate, sodium beta-tridecylaminopropionate, sodium beta-tetradecylaminopropionate, sodium beta-isotetradecylaminopropionate, sodium beta-hexadecylaminopropionate, sodium beta-isohexadecylaminopropionate, sodium beta-stearylaminopropionate, sodium beta-isostearylaminopropionate, sodium beta-nonadecylaminopropionate, and sodium beta-eicosylaminopropionate. The aminopropionic acid type amphoteric surfactant (A1) is preferably sodium β-laurylaminopropionate, potassium β-laurylaminopropionate, or triethanolamine β-laurylaminopropionate, more preferably sodium β-laurylaminopropionate, because they are easily available and have good foaming properties.

[0011] As the aminopropionic acid type amphoteric surfactant (A1), commercially available products can be used, and examples of commercially available products include Piuceria AMC manufactured by Sanyo Chemical Industries, Ltd. The aminopropionic acid type amphoteric surfactant (A1) may be used alone or in combination of two or more kinds.

[0012] The hair wash of the present invention contains, based on 100% by mass of the hair wash, 0.1 to 5% by mass, preferably 0.3 to 4% by mass, and more preferably 0.9 to 3.2% by mass of the aminopropionic acid type amphoteric surfactant (A1). When the content of the aminopropionic acid type amphoteric surfactant (A1) is within the above range, discoloration is less likely to occur when used on dyed hair, and foaming is also likely to improve. When the content of the aminopropionic acid type amphoteric surfactant (A1) is less than the above lower limit, the feeling during washing, rinsing, and after rinsing is insufficient, and discoloration is likely to occur when used on dyed hair, while when the content is more than the above upper limit, foam disappearance is slow, adverse effects are observed on the effect of the treatment used thereafter, and discoloration is also likely to occur.

[0013] <Amphoteric surfactants other than aminopropionic acid type (A2)> The non-aminopropionic acid type amphoteric surfactant (A2) (hereinafter also referred to as component (A2)) is an amphoteric surfactant other than component (A1). That is, component (A2) is an amphoteric surfactant other than the aminopropionic acid type amphoteric surfactant (A1).

[0014] The non-aminopropionic acid type amphoteric surfactant (A2) is not particularly limited as long as it is an amphoteric surfactant other than component (A1), and examples thereof include alkyl betaine type surfactants, amidopropyl betaine type amphoteric surfactants, imidazolinium betaine type amphoteric surfactants, carboxy betaine type amphoteric surfactants, sulfobetaine type amphoteric surfactants, hydroxysulfobetaine type amphoteric surfactants, amidosulfobetaine type amphoteric surfactants, phosphobetaine type amphoteric surfactants, amino carboxylate type amphoteric surfactants, and amido amine type amphoteric surfactants. The amphoteric surfactant (A2) other than the aminopropionic acid type may be used alone or in combination of two or more kinds.

[0015] Examples of amidopropyl betaine type amphoteric surfactants include amidopropyl betaine laurate, amidopropyl betaine coconut oil fatty acid, amidopropyl betaine isostearate, amidopropyl betaine palm kernel fatty acid, amidopropyl betaine ricinoleate, and the like. Examples of imidazolinium betaine type amphoteric surfactants include coconut oil alkyl-N-hydroxyethyl imidazolinium betaine, coconut oil alkyl-N-carboxyethyl-N-hydroxyethyl imidazolinium betaine, N-lauroyl-N'-carboxymethyl-N'-hydroxyethyl ethylenediamine sodium, and 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine. An example of a carboxybetaine type amphoteric surfactant is lauryl dimethylaminoacetate betaine, and an example of a hydroxysulfobetaine type amphoteric surfactant is lauryl hydroxysulfobetaine.

[0016] As the amphoteric surfactant (A2) other than the aminopropionic acid type, from the viewpoints of foam quality and the smoothness of the skin when rinsed off, preferred are amidopropyl betaine type amphoteric surfactants, imidazolinium betaine type amphoteric surfactants, carboxybetaine type amphoteric surfactants, and hydroxysulfobetaine type amphoteric surfactants, more preferred are amidopropyl betaine type amphoteric surfactants, and further preferred are lauric acid amidopropyl betaine and coconut oil fatty acid amidopropyl betaine.

[0017] The hair wash of the present invention contains, based on 100% by mass of the hair wash, preferably 0.015 to 5% by mass, and more preferably 0.5 to 4.2% by mass, of the amphoteric surfactant (A2) other than the aminopropionic acid type.

[0018] <Anionic surfactant (B)> The anionic surfactant (B) (hereinafter also referred to as component (B)) is not particularly limited as long as it is an anionic surfactant, and examples thereof include fatty acid salts, N-acylamino acid salts, N-acylmethyl taurine salts, alkylbenzenesulfonates, alkanesulfonates, alkenylsulfonates, alkylsulfonates, α-olefinsulfonates, acylisethionates, polyoxyethylene alkylsulfosuccinates, alkylsulfosuccinates, alkyl sulfate salts, alkyl ether sulfate salts, sulfofatty acid methyl ester salts, fatty acid alkanolamide sulfate salts, monoacylglycerin sulfate salts, alkyl phosphate salts, polyoxyethylene alkyl ether phosphate salts, alkyl aryl ether phosphate salts, fatty acid amide ether phosphoric acid salts, polyoxyethylene alkyl ether carboxylic acid or a salt thereof, and polyoxyethylene alkyl ether sulfate or a salt thereof.

[0019] From the viewpoint of hair softness during and after rinsing, the anionic surfactant (B) is preferably one or more selected from the group consisting of N-acylamino acid salts, N-acylmethyltaurine salts, and polyoxyethylene alkyl ether carboxylic acids or salts thereof.

[0020] Examples of the amino acid residue in the N-acylamino acid salt include acidic amino acids such as glutamic acid and aspartic acid, neutral amino acids such as glycine, alanine, threonine, methylalanine and sarcosine (N-methylglycine), and basic amino acids such as lysine and arginine. Of these, from the viewpoints of rapid foaming and foam texture, the amino acid residue is preferably an acidic amino acid or a neutral amino acid, and the N-acylamino acid salt is preferably an N-acylalanine salt. Examples of the N-acylamino acid salt include alkali metal salts such as sodium and potassium, alkanolamine salts such as monoethanolamine salt, diethanolamine salt and triethanolamine salt, alkylamine salts, ammonium salts, etc. Among these, alkali metal salts are preferred.

[0021] Examples of N-acyl methyl taurine salts include sodium N-cocoyl taurate, sodium N-cocoyl-N-methyl taurate, sodium N-lauroyl-N-methyl taurate, sodium N-coconut oil fatty acid-N-methyl taurate, triethanolamine N-coconut oil fatty acid-N-methyl taurine, triethanolamine N-palm oil fatty acid-N-ethyl taurine, magnesium N-cocoyl taurate, magnesium N-cocoyl-N-methyl taurate, magnesium N-lauroyl-N-taurate, magnesium N-lauroyl-N-methyl taurate, magnesium N-coconut oil fatty acid-N-methyl taurate, and the like. Examples of the salt in the N-acylmethyltaurine salt include alkali metal salts such as sodium and potassium, alkanolamine salts such as monoethanolamine salt, diethanolamine salt and triethanolamine salt, alkylamine salt, ammonium salt, etc. Among these, alkali metal salts are preferred. From the viewpoints of rapid foaming and foam texture, the N-acylmethyltaurate salt is preferably sodium N-coconut oil fatty acid-N-methyltaurate.

[0022] The polyoxyethylene alkyl ether carboxylic acid or its salt is preferably one or more selected from the group consisting of polyoxyethylene lauryl ether carboxylic acid or its salt, polyoxyethylene myristyl ether carboxylic acid or its salt, and polyoxyethylene palmityl ether carboxylic acid or its salt, more preferably one or two selected from the group consisting of polyoxyethylene lauryl ether carboxylic acid or its salt, and polyoxyethylene myristyl ether carboxylic acid or its salt, further preferably polyoxyethylene lauryl ether carboxylic acid or its salt, and particularly preferably sodium polyoxyethylene lauryl ether acetate. The carboxylic acid in the polyoxyethylene alkyl ether carboxylic acid is not particularly limited, but acetic acid is preferred. Examples of the salt of polyoxyethylene alkyl ether carboxylic acid include alkali metal salts such as sodium and potassium, alkanolamine salts such as monoethanolamine salt, diethanolamine salt and triethanolamine salt, alkylamine salt, ammonium salt, etc. Among these, alkali metal salts are preferred.

[0023] The anionic surfactant (B) may be used alone or in combination of two or more kinds. From the viewpoint of foam elasticity and foam retention, it is preferable to use, as the anionic surfactant (B), a combination of two or more types selected from the group consisting of N-acylamino acid salts, N-acylmethyltaurine salts, and polyoxyethylene alkyl ether carboxylic acids or salts thereof.

[0024] The hair wash of the present invention contains, based on 100% by mass of the hair wash, 1 to 23% by mass of the anionic surfactant (B), more preferably 4 to 20% by mass, and even more preferably 5 to 16% by mass.

[0025] In the hair wash of the present invention, the mass ratio (A1) / (A2) of the component (A1) to the component (A2) is 1-9, preferably 1-5, and more preferably 1-2. When (A1) / (A2) is within the above range, the formula has excellent foaming ability and is resistant to fading when used on dyed hair. When (A1) / (A2) is less than the above lower limit, the formula has poor foaming ability, foam retention, and refreshing feeling of hair when rinsing, and is likely to have a detrimental effect on the treatment effect. When (A1) / (A2) is more than the above upper limit, the formula has poor finger-combability and softness when rinsing, and is prone to fading when used on dyed hair.

[0026] The total content of components (A1), (A2) and (B) in the hair wash of the present invention is 7 to 25 mass %, preferably 10 to 20 mass %, and more preferably 12.5 to 17.5 mass %. When the total content of components (A1), (A2), and (B) is within the above range, the hair feels excellent when rinsed and is unlikely to be adversely affected by the treatment effect. When the total content of components (A1), (A2), and (B) is less than the above lower limit, the foaming, foam retention, and hair feeling of freshness when rinsed are inferior, and the foam tends to run out slowly, while when the total content is more than the above upper limit, the hair feels inferior when combed through and is soft, and is likely to be adversely affected by the treatment effect.

[0027] In the hair wash of the present invention, the mass ratio ((A1)+(A2)) / (B) of the total content of components (A1) and (A2) to the content of component (B) is preferably 1 / 10 to 1, more preferably 1 / 5 to 1 / 2, and even more preferably 1 / 4 to 1 / 3. When ((A1)+(A2)) / (B) is within the above range, foam disappears quickly and the transparency of the agent tends to be high.

[0028] When component (A2) is an amidopropyl betaine-type amphoteric surfactant and component (B) is one or more selected from the group consisting of N-acylamino acid salts, N-acylmethyl taurine salts, and polyoxyethylene alkyl ether carboxylic acids or salts thereof, the hair wash of the present invention is preferred because it maintains low irritation while having good foaming and foam retention, and is likely to provide a refreshing feeling after washing.

[0029] <One or more components (C) selected from the group consisting of cationic polymers and silicone oils> The hair wash of the present invention preferably contains, in addition to components (A1), (A2), and (B), one or more components (C) (hereinafter sometimes simply referred to as component (C)) selected from the group consisting of cationic polymers and silicone oils. When the hair wash of the present invention contains component (C), the hair tends to have excellent finger-combing properties during and after rinsing.

[0030] Examples of the cationic polymer include cationic cellulose (O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride, etc.), cationic starch, cationic xanthan gum, diallyl quaternary ammonium salt / acrylamide copolymer, vinylimidazolium trichloride / vinylpyrrolidone copolymer, hydroxyethyl cellulose / dimethyl diallyl ammonium chloride copolymer, vinylpyrrolidone / quaternary dimethylaminoethyl methacrylate copolymer, vinylpyrrolidone / alkylaminoacrylate copolymer, vinylpyrrolidone / alkylaminoacrylate / vinylcaprolactam copolymer, vinylpyrrolidone / methacrylamidopropyl trimethylammonium chloride copolymer, alkylacrylamide / acrylate / alkylaminoalkylacrylamide / polyethylene glycol methacrylate copolymer, adipic acid / dimethylaminohydroxypropyl ethylenetriamine copolymer, cationic fenugreek gum, cationic guar gum, cationic tara gum, and cationic locust bean gum. The cationic polymers may be used alone or in combination of two or more.

[0031] Examples of silicone oils include silicone compounds such as amino-modified organopolysiloxanes such as amodimethicone, aminoethylaminopropyl dimethicone, and aminopropyl dimethicone, methylpolysiloxane, highly polymerized methylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, polyether-modified organopolysiloxane, fluoroalkyl-polyoxyalkylene-co-modified organopolysiloxane, alkyl-modified organopolysiloxane, dimethiconol, terminal-modified organopolysiloxane, fluorine-modified organopolysiloxane, and acrylic silicone. The silicone oils may be used alone or in combination of two or more.

[0032] Because of its excellent foaming properties and its effect of reducing squeaking during washing, component (C) is preferably one or more selected from the group consisting of cationic cellulose and cationic guar gum, and more preferably cationic cellulose.

[0033] The content of component (C) in the hair wash of the present invention is preferably 0.05 to 1.0 mass%, more preferably 0.1 to 0.8 mass%, and even more preferably 0.3 to 0.6 mass%, based on 100 mass% of the hair wash, from the viewpoints of the feel of the hair wash when used and any adverse effects on the treatment effect.

[0034] When component (B) is one or more members selected from the group consisting of N-acylamino acid salts, N-acylmethyl taurine salts, and polyoxyethylene alkyl ether carboxylic acids or salts thereof, and component (C) is cationic cellulose, the hair wash of the present invention is preferred because it has good foaming and foam retention while maintaining low irritation, and also provides good finger combability during and after washing, and is also likely to leave a refreshing feeling after washing.

[0035] <Other ingredients> The hair wash of the present invention usually contains water. The content of water is not particularly limited, and can be appropriately adjusted depending on the type or amount of components other than water, the purpose of use, etc. Specific examples of water include tap water, ion-exchanged water, distilled water, purified water, and natural water, and sterilized water is preferable.

[0036] The hair wash of the present invention may contain a nonionic thickener. The nonionic thickener is not particularly limited as long as it is a nonionic thickener, and examples thereof include cellulose-based nonionic thickeners such as alkyl cellulose and hydroxyalkyl cellulose; polyvinyl-based nonionic thickeners such as polyvinyl alcohol, polyvinylpyrrolidone, and (VP / VA) copolymer (vinyl acetate-vinylpyrrolidone copolymer); polyethylene glycol-based nonionic thickeners such as highly polymerized polyethylene glycol, polyethylene glycol distearate, (PEG-240 / decyl tetradeceth-20 / HDI) copolymer, and polyglyceryl behenate-polyglyceryl-6 octastearate; alkyl alkanol-type nonionic surfactants, and fatty acid alkanolamide-type nonionic surfactants. The nonionic thickener is preferably a polyethylene glycol-based nonionic thickener, more preferably polyethylene glycol distearate. The content of the nonionic thickener is not particularly limited, and can be appropriately adjusted depending on the type or amount of the nonionic thickener, the purpose of use, and the like.

[0037] The hair wash of the present invention may contain any optional components other than the above-mentioned components, as long as the effects of the present invention are not impaired. Examples of the optional components include moisturizers, herbal medicines, chelating agents, preservatives, antioxidants, cooling agents, antistatic agents, vitamins, proteins, fragrances, antibacterial agents, emulsion stabilizers, surfactants (excluding component (A1), component (A2), and component (B)), pH adjusters, higher alcohols, silicones (excluding component (C)), oils, solvents, and pigments. More specifically, the optional components that can be used include preservatives such as phenoxyethanol and alkylparabens; and pH adjusters such as lactic acid and its salts, and citric acid and its salts.

[0038] <Manufacturing method> The hair wash of the present invention can be produced by, for example, stirring, mixing, heating, dissolving, dispersing, etc., using a known method, and the production method is not particularly limited. The production method may be carried out under heating conditions in order to mix each component uniformly. The temperature when produced under heating conditions is, for example, 75 to 85°C.

[0039] <Dosage form> The properties of the hair wash of the present invention are not particularly limited, but examples include liquid, viscous liquid, milk, cream, etc., and a viscous liquid is preferred because it is less likely to drip when taken into the hand and is easy to apply evenly to the hair. The viscosity of the hair wash of the present invention is not particularly limited, but in order to prevent the wash from dripping when taken into the hands and to facilitate uniform application to the hair, it is preferable that the viscosity is 500 to 5,000 when measured at 25°C with a B-type viscometer and a No. 3 rotor at 12 revolutions for 30 seconds. The pH of the hair wash of the present invention is not particularly limited, but in view of low irritation to the skin, the pH is preferably 4.0 to 7.0 at 25° C. The method for measuring the pH is not particularly limited, and it may be measured under appropriate measurement conditions using a general pH measurement method (e.g., glass electrode method).

[0040] The appearance of the hair cleanser of the present invention may be, for example, transparent or opaque. Since the stability over time can be maintained, the appearance of the hair cleanser of the present invention is preferably transparent. Specifically, the transmittance at a wavelength of 580 nm measured by the following measurement method is preferably 1% or more, more preferably 20% or more. (Measurement method) The prepared hair wash is placed in a polystyrene cell with an optical path length of 10 mm and an optical path width of 4 mm, and the transmittance at a wavelength of 580 nm is measured using a spectrophotometer.

[0041] <How to use> The hair cleansing agent of the present invention can be applied to hair and then optionally lathered before use. The hair wash of the present invention can be used on both dry and wet hair, but is preferably applied to wet hair. The hair wash of the present invention is preferably used on hair that has been dyed, and more preferably on hair that has been dyed with an oxidative hair dye. The use of the hair wash of the present invention is not particularly limited, but it is preferably used as a shampoo (including rinse-in shampoo), and more preferably used as a rinse-off shampoo. EXAMPLES

[0042] The present invention will now be described in more detail with reference to examples, but the present invention is not limited to these. <Examples 1 to 56 and Comparative Examples 1 to 9> Hair cleansing agents were produced using the commercially available products shown in Table 1 and mixed with the ingredients according to the recipes shown in Tables 2 to 7, and used as samples for sensory evaluation. The numerical values ​​for the recipes in Tables 2 to 7 represent the mass % of each ingredient when the hair cleansing agent is taken as 100 mass %, and are expressed as values ​​converted into pure contents.

[0043] [Table 1]

[0044] <Test method for evaluating discoloration for evaluation items (1) to (3)> Step 1: Dyeing the hair strands An oxidative hair dye consisting of a 1:1 mixture of Agent 1 (Asian Color Fest 6PINK, manufactured by Arimino) and Agent 2 (Asian Color Fest OX 2.8%, manufactured by Arimino) was applied at 5g per strand of hair (Beaulux BR-3-A, 10cm 1g), left for 30 minutes, washed with running water at 40°C for 1 minute, and then dried with a hair dryer.

[0045] Step 2. Washing the dyed hair strands with detergent After wetting one of the hair bundles dyed in step 1 with running water at 40°C, apply 0.5 g of the sample to each hair bundle, lather and wash for 30 seconds, rinse with running water at 40°C for 30 seconds, and dry with a hair dryer. This was repeated as many times as necessary.

[0046] Step 3. Evaluation of fading After dyeing in step 1 and washing in step 2, the hair bundles were each measured for their Lab values ​​using a color meter (MINOLTA CR-200) and the difference ΔE (Delta E) was calculated. Three hair bundles were tested and the average value was calculated.

[0047] <Sensory evaluation test method for evaluation items (4) to (18)> The evaluation items (4) to (18) were evaluated by the following methods. Ten expert panelists (hairdressers) each performed a sensory evaluation using the samples and a bundle of hair according to the evaluation criteria listed for each evaluation item. The average scores of the 10 panelists for each evaluation item were calculated and classified as follows: ◎: The average rating of 10 expert panelists (beauticians) is 3.5 points or higher. ○: The average evaluation score of 10 professional panelists (hairdressers) is between 2.5 and 3.5 points. △: The average evaluation score of 10 professional panelists (hairdressers) is 1.5 points or more and less than 2.5 points. ×: The average evaluation score of 10 professional panelists (hairdressers) is less than 1.5 points. The hair bundle used in evaluation items (4) to (18) was approximately 30 cm long and 10 g of human hair (product name BS-B3A, manufactured by Beaulax), and the sample used was 0.5 g.

[0048] Evaluation item (1) Color fading In the fading evaluation test, the washing in step 2 was repeated three times. The Lab value before washing in step 2 and the Lab value after three washings were measured, and the average ΔE was calculated. The smaller the ΔE, the less fading there was. ◎: △E value is 0 or more and less than 1.0 〇: △E value is 1.0 or more and less than 2.0 △: △E value is 2.0 or more and less than 3.0 ×: △E value 3.0 or more

[0049] Evaluation item (2) Color fading during continuous use In the fading evaluation test, the washing in step 2 was repeated 10 times. The Lab value before washing in step 2 and the Lab value after 10 washings were measured, and the average ΔE was calculated. The smaller the ΔE, the less fading there was. ◎: △E value is 0 or more and less than 1.5 ○: △E value is 1.5 or more and less than 3.0 △: △E value is 3.0 or more and less than 4.5 ×: △E value 4.5 or more

[0050] Evaluation item (3) Dye leakage into cleaning solution The hair bundles dyed in step 1 were immersed in 50 ml of a solution in which each sample was diluted 10 times with 40°C water for 10 minutes to allow the dye to flow out. The colored solution was measured with an absorbance meter (650 nm) to measure the degree of dye flow-out. The lower the absorbance, the less dye flowed out into the immersion solution, and the greater the anti-fading effect. ◎: absorbance less than 0.15 ○: Absorbance is 0.15 or more and less than 0.3 △: absorbance is 0.3 or more and less than 0.45 ×: absorbance is 0.45 or more

[0051] Evaluation item (4) Foaming Each sample was applied to a strand of hair wetted with running water at 40°C, and the quality of lathering when worked up was evaluated visually and by touch. 4 points: Very good foaming 3 points: Good foaming 2 points: A little foam but it disappears quickly 1 point: No foaming at all

[0052] Evaluation item (5) Elasticity of foam Each sample was applied to a strand of hair wetted with running water at 40°C, and the elasticity of the foam produced when it was lathered was evaluated by touch. 4 points: Very elastic 3 points: Somewhat elastic 2 points: Not very elastic 1 point: No elasticity at all

[0053] Evaluation item (6) Foam retention Each sample was applied to a strand of hair wetted with running water at 40°C, and lathered. The lather retention after 30 seconds was visually evaluated. 4 points: The foam volume is maintained compared to the amount immediately after whipping and the foam lasts very long. 3 points: The amount of foam lost is less than immediately after whipping, and the foam lasts a little longer. 2 points: The amount of foam is reduced compared to the amount immediately after whipping, and the foam retention is poor. 1 point: The amount of foam has decreased significantly compared to the amount immediately after whipping, and foam retention is very poor.

[0054] Evaluation item (7) Refreshing feeling of hair when rinsing Each sample was applied to a strand of hair wetted with running water at 40°C, lathered, and then rinsed with running water at 40°C, after which the refreshing feeling of the hair was evaluated by touch. 4 points: Very refreshing 3 points: Refreshing 2 points: Not very refreshing and a bit slimy 1 point: Very low refreshing feeling, very slimy

[0055] Evaluation item (8) Finger feel when washing Each sample was applied to a strand of hair wetted with running water at 40°C, and the hair was lathered and washed, during which the smoothness of the hair when run through was evaluated by touch. 4 points: Very good 3 points: Good 2 points: bad 1 point: Very bad

[0056] Evaluation item (9) Hair softness after washing Each sample was applied to a strand of hair wetted with running water at 40°C, and the hair was lathered and washed, during which the softness of the hair was evaluated by touch. 4 points: Very soft 3 points: soft 2 points: Hard 1 point: Very hard

[0057] Evaluation item (10) Hair smoothness when rinsing Each sample was applied to a strand of hair wetted with running water at 40°C, lathered, and then rinsed with running water at 40°C, after which the ease with which the hair could be run through was evaluated by touch. 4 points: Very good 3 points: Good 2 points: bad 1 point: Very bad

[0058] Evaluation item (11) Hair softness when rinsing Each sample was applied to a strand of hair wetted with running water at 40°C, lathered, and then rinsed with running water at 40°C, after which the softness of the hair was evaluated by touch. 4 points: Very soft 3 points: soft 2 points: Hard 1 point: Very hard

[0059] Evaluation item (12) Speed ​​of foam disappearance Each sample was applied to a strand of hair wetted with running water at 40°C, lathered, and then rinsed with running water at 40°C to evaluate by touch how quickly the lather disappeared. 4 points: Very fast 3 points: Fast 2 points: Slow 1 point: Very slow

[0060] Evaluation item (13) Hair feel after rinsing Each sample was applied to a strand of hair wetted with running water at 40°C, lathered, rinsed with running water at 40°C, and then towel-dried, after which the smoothness of the hair was evaluated by its feel. 4 points: Very good 3 points: Good 2 points: bad 1 point: Very bad

[0061] Evaluation item (14) Softness of hair after rinsing Each sample was applied to a strand of hair wetted with running water at 40°C, lathered, rinsed with running water at 40°C, and towel-dried, after which the softness of the hair was evaluated by touch. 4 points: Very soft 3 points: soft 2 points: Hard 1 point: Very hard

[0062] Evaluation item (15) Impact on treatment effect (settling) The effect of using 0.5 g of a treatment (Splenage Treatment Gentle Moist, manufactured by Arimino) after washing with each sample was evaluated. The effect on hair manageability was evaluated by comparing a case in which a hair strand was washed with 0.5 g of a 5% by mass aqueous solution of sodium polyoxyethylene lauryl ether sulfate, then dried using a treatment (control), with a case in which a hair strand was washed with each sample, then dried using a treatment. 4 points: better than control 3 points: Slightly better than the control 2 points: Slightly worse than control 1 point: Worse than control

[0063] Evaluation item (16) Effect on treatment effect (moisturizing feeling) The effect of using 0.5 g of a treatment (Splenage Treatment Gentle Moist, manufactured by Arimino) after washing with each sample was evaluated. The effect on the moist feeling of hair was evaluated by comparing a case in which a hair strand was washed with 0.5 g of a 5% by mass aqueous solution of sodium polyoxyethylene lauryl ether sulfate, then dried using a treatment (control), with a case in which a hair strand was washed with each sample, then dried using a treatment. 4 points: better than control 3 points: Slightly better than the control 2 points: Slightly worse than control 1 point: Worse than control

[0064] Evaluation item (17) Effect on treatment effect (softness) The effect of using 0.5 g of a treatment (Splenage Treatment Gentle Moist, manufactured by Arimino) after washing with each sample was evaluated. The effect on hair softness was evaluated by comparing a case in which a hair strand was washed with 0.5 g of a 5% by mass aqueous solution of sodium polyoxyethylene lauryl ether sulfate, then dried using a treatment (control), with a case in which a hair strand was washed with each sample, then dried using a treatment. 4 points: better than control 3 points: Slightly better than the control 2 points: Slightly worse than control 1 point: Worse than control

[0065] Evaluation item (18) Effect of treatment (feel on the fingers) The effect of using 0.5 g of a treatment (Splenage Treatment Gentle Moist, manufactured by Arimino) after washing with each sample was evaluated. The effect on the runnability of hair was evaluated by comparing a case in which a hair strand was washed with 0.5 g of a 5% by mass aqueous solution of sodium polyoxyethylene lauryl ether sulfate, then dried using a treatment (control), with a case in which a hair strand was washed with each sample, then dried using a treatment. 4 points: better than control 3 points: Slightly better than the control 2 points: Slightly worse than control 1 point: Worse than control

[0066] Evaluation item (19) Transparency of drug The transparency of each sample was measured with an absorbance meter. The transparency was evaluated visually and by measuring the transmittance of light with a wavelength of 580 nm using a Jusco spectrophotometer "V-730IRM." The samples were placed in a polystyrene cell with an optical path length of 10 mm and an optical path width of 4 mm. ◎: Transparency is maintained with a transmittance of 20% or more. ○: Transmittance is 1% or more and less than 20%, and some turbidity is observed. △: Transmittance is between 0.2% and 1%, and it is quite cloudy. ×: The transmittance is less than 0.2%, and it is definitely opaque.

[0067] The viscosity of each sample was measured at 25° C. using a Brookfield viscometer with a No. 3 rotor at 12 revolutions for 30 seconds. The viscosity of each sample in Examples 1 to 56 was within the range of 500 to 5,000.

[0068] [Table 2]

[0069] [Table 3]

[0070] [Table 4]

[0071] [Table 5]

[0072] [Table 6]

[0073] [Table 7]

[0074] The hair washes produced in Examples 1 to 56 all achieved good results in all of the evaluation items (1) to (19). The hair cleanser of the present invention has an excellent feel when used as a hair cleanser, has almost no adverse effect on the effect of a treatment used thereafter, and causes little discoloration when used on dyed hair.

[0075] The hair wash produced in Comparative Example 1 contained less component (A1) than the specified amount, and therefore the feel during washing, rinsing, and after rinsing was unsatisfactory, and when used on dyed hair, it caused significant discoloration.

[0076] The hair wash produced in Comparative Example 2 contained a higher amount of component (A1) than specified, which resulted in slow foam removal and adverse effects on the treatment. In addition, when used on dyed hair, it caused significant discoloration.

[0077] The hair wash produced in Comparative Example 3 had a ratio (A1) / (A2) smaller than the specified ratio, and therefore did not have sufficient foaming, foam retention, or refreshing feeling on hair when rinsing. In addition, the foam took a long time to rinse off, which adversely affected the treatment effect.

[0078] The hair wash produced in Comparative Example 4 had a ratio (A1) / (A2) greater than the specified ratio, and therefore the feel when used, such as the ease of running fingers through the hair and softness when rinsing, was unsatisfactory, and when used on dyed hair, the color faded significantly.

[0079] The hair wash produced in Comparative Example 5 had a smaller total amount of (A1), (A2), and (B) than the specified amount, and therefore had poor foaming, foam retention, and refreshing feeling on hair when rinsing, and also took a long time to rinse off.

[0080] The hair wash produced in Comparative Example 6 had a greater than specified amount of the total of (A1), (A2), and (B), and therefore the hair was not smooth to the touch and soft during washing, and the foam took a long time to rinse off, adversely affecting the treatment effect.

[0081] The hair wash produced in Comparative Example 7 did not contain (A1), and therefore was insufficient in terms of lathering, lather retention, refreshing feeling of hair after rinsing, and other usability, and also had a detrimental effect on the treatment effect.

[0082] The hair wash produced in Comparative Example 8 did not contain (A2), and therefore the feel upon use, such as the ease of running fingers through the hair and the softness of the hair during washing and rinsing, was unsatisfactory.

[0083] The hair wash produced in Comparative Example 9 did not contain (B), and therefore had poor foaming, foam retention, and a refreshing feeling on the hair when rinsing. In addition, the foam took a long time to rinse off, which had a detrimental effect on the treatment effect.

Claims

1. 0.1 to 5% by mass of an aminopropionic acid type amphoteric surfactant (A1); an amphoteric surfactant (A2) other than an aminopropionic acid type; and an anionic surfactant (B), the mass ratio (A1) / (A2) of (A1) to (A2) is 1 to 9; A hair wash, in which the total amount of (A1), (A2) and (B) is 7 to 25% by mass.

2. 2. The hair wash according to claim 1, wherein a mass ratio of the total of (A1) and (A2) to (B), ((A1)+(A2)) / (B), is 1 / 10 to 1.

3. The hair wash according to claim 1 or 2, further comprising one or more components (C) selected from the group consisting of cationic polymers and silicone oils.

4. The hair wash according to claim 1 or 2, wherein the (A1) is sodium β-laurylaminopropionate.

5. The hair wash according to claim 1 or 2, wherein the (A2) is an amidopropyl betaine type amphoteric surfactant.

6. 3. The hair wash according to claim 1, wherein (B) is at least one member selected from the group consisting of N-acylamino acid salts, N-acylmethyltaurine salts, and polyoxyethylene alkyl ether carboxylic acids or salts thereof.

7. The hair wash according to claim 3, comprising 0.05 to 1.0% by mass of the component (C).

8. 4. The hair wash according to claim 3, wherein the component (C) is at least one member selected from the group consisting of cationic cellulose and cationic guar gum.

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