Hair cleansing composition

Abstract

To provide a hair cleansing composition filled into a foamer container, which has excellent discharge stability at low temperatures and makes hair easy to comb after washing.SOLUTION: Provided is a hair cleansing composition containing a component (A): an acidic N-acylamino acid salt, and a component (B): an acylmethyltaurine salt, having a viscosity of 500 mPa s or less as measured at 25°C with a B-type viscometer, and being filled into a foamer container for use.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a hair cleansing composition.

Background Art

[0002] As a technique of using an amino acid-based surfactant in a hair cleansing agent, there are those described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2018-172315) and Patent Document 2 (Japanese Patent Application Laid-Open No. 2020-176062). Patent Document 1 describes a hair cleansing composition containing a specific amount of sodium cocoyl methyl taurine, a specific amount of N-acyl amino acid salt, and lauryldimethylaminoacetate betaine (Claim 1). Further, the same document describes that it is possible to provide a hair cleansing composition that is excellent in foaming, fineness of foam, foam retention, and smoothness of foam during hair washing, and has a viscosity suitable for use (paragraph 0011), and specifically, it is determined that a viscosity of 500 mPa·s or more is good (paragraph 0040).

[0003] Patent Document 2 describes a hair cosmetic containing a kawaranadeshiko seed extract and an N-acyl sarcosine salt, and in Formulation Example 2, a hair shampoo having a viscosity of 4000 mPa·s and containing specific amounts of specific components including the above N-acyl sarcosine salt is described (paragraph 0039).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] On the other hand, when the inventors studied a hair shampoo of the type filled in a former container, there was room for improvement in terms of achieving favorable discharge stability at low temperatures and combability after shampooing.

[0006] Therefore, the present invention provides a hair shampoo composition filled in a former container, which has excellent discharge stability at low temperatures and favorable combability after shampooing.

Means for Solving the Problems

[0007] According to the present invention, the following hair shampoo compositions and hair shampoos are provided. [1] Containing the following components (A) and (B), having a viscosity measured by a B-type viscometer at 25°C of 500 mPa·s or less, a hair shampoo composition filled in a former container and used. (A) Acidic N-acyl amino acid salt (B) Acyl methyl taurine salt [2] The hair shampoo composition according to [1], having a viscosity measured by a B-type viscometer immediately after storage at 5°C for 1 day of 500 mPa·s or less. [3] The hair shampoo composition according to [1] or [2], wherein the mass ratio ((A) / (B)) of the content of the component (A) to the content of the component (B) in the hair shampoo composition is 0.25 or more and 4 or less. [4] The hair shampoo composition according to any one of [1] to [3], wherein the component (A) contains N-acyl glutamate. [5] The hair shampoo composition according to any one of [1] to [4], wherein the component (B) is at least one compound selected from the group consisting of sodium cocoyl methyl taurine and sodium cocoyl methyl taurine taurine. [6] The hair shampoo composition according to any one of [1] to [5], further containing a component (C): an amphoteric surfactant. [7] The hair cleansing composition according to [6], wherein the content of the component (C) in the hair cleansing composition is 0.25 or more in terms of the mass ratio to the total amount of the anionic surfactant and the nonionic surfactant contained in the hair cleansing composition. [8] The hair cleansing composition according to [6] or [7], wherein the component (C) contains a betaine-type amphoteric surfactant. [9] The hair cleansing composition according to any one of [1] to [8], further comprising a component (D): polyhydric alcohol.

[10] The hair cleansing composition according to [9], wherein the content of the component (D) in the hair cleansing composition is less than 22% by mass based on the whole hair cleansing composition.

[11] The hair cleansing composition according to any one of [1] to

[10] , further comprising a component (E): cationic polymer.

[12] The hair cleansing composition according to

[11] , wherein the component (E) contains one or more selected from the group consisting of polyquaternium-10, polyquaternium-22, polyquaternium-7, and polyquaternium-39.

[13] The hair cleansing composition according to any one of [1] to

[12] , having a pH at 25 °C of 4.5 or more and 7.0 or less.

[14] The hair cleansing composition according to any one of [1] to

[13] , wherein the former container is a non-gas type.

[15] A hair cleansing agent filled with the hair cleansing composition according to any one of [1] to

[14] in a former container.

Advantages of the Invention

[0008] According to the present invention, it is possible to provide a hair cleansing composition filled in a former container, which is excellent in discharge stability at low temperatures and makes the combability after hair washing favorable.

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described. In the present embodiment, the composition can contain each component alone or in combination of two or more. In this specification, "~" indicating a numerical range represents "above" and "below", and includes both of the numerical values at both ends.

[0010] (Hair cleansing composition) In this embodiment, the hair cleansing composition contains the following components (A) and (B), has a viscosity measured by a B-type viscometer at 25°C of 500 mPa·s or less, and is filled in a former container for use. (A) Acidic N-acyl amino acid salt (B) Acyl methyl taurine salt First, the components of the hair cleansing composition (hereinafter, also simply referred to as "composition") will be described.

[0011] (Component (A)) The acidic N-acyl amino acid salt (N-acyl acidic amino acid salt) of component (A) is specifically a salt of an acyl compound of an acidic amino acid and a fatty acid. Component (A) may contain at least one of the D-form and the L-form, and may be, for example, the DL-form.

[0012] The acidic amino acid in component (A) is specifically at least one selected from the group consisting of glutamic acid and aspartic acid, and preferably glutamic acid. Thereby, the combability after hair washing can be made more preferable.

[0013] The acyl group in component (A) is preferably derived from a fatty acid having 8 or more carbon atoms, and preferably from a fatty acid having 24 or less carbon atoms, more preferably 22 or less carbon atoms, still more preferably 20 or less carbon atoms, and even more preferably 18 or less carbon atoms. Thereby, a composition excellent in discharge stability at low temperature and combability after hair washing can be obtained more stably. The above fatty acid may contain at least one of a saturated fatty acid and an unsaturated fatty acid. Further, the above fatty acid may contain at least one of a linear fatty acid and a branched fatty acid. The above fatty acid is, for example, one or more selected from the group consisting of lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, beef tallow fatty acid, coconut oil fatty acid, and palm kernel oil fatty acid, and is preferably coconut oil fatty acid. Further, the acyl group preferably contains one or more selected from the group consisting of lauroyl group, myristoyl group, and cocoyl group, more preferably contains at least one of lauroyl group and cocoyl group, and still more preferably is cocoyl group.

[0014] Component (A) preferably contains N-acylglutamate, and more preferably contains cocoyl glutamate. Thereby, the foam quality and the combability after hair washing can be made more excellent. Further, the discharge stability at low temperature when blended in combination with component (B) can be obtained more stably.

[0015] The salt in component (A) is, for example, one or more selected from the group consisting of alkali metal salts such as lithium salt, sodium salt, and potassium salt; alkaline earth metal salts such as calcium salt and magnesium salt; alkanolamine salts such as monoethanolamine salt, diethanolamine salt, and triethanolamine (TEA) salt; ammonium salt; and basic organic substance salts, and is preferably at least one selected from the group consisting of alkali metal salts and alkanolamine salts, and more preferably one or more selected from the group consisting of sodium salt, potassium salt, and TEA salt. Thereby, the availability of component (A) can be improved. Also, in terms of improving the handleability of component (A), the salt in component (A) is preferably an alkali metal salt, and more preferably at least one selected from the group consisting of sodium salt and potassium salt. Specifically, component (A) contains at least one of the mono-salt and the di-salt, preferably contains one or more selected from the group consisting of monosodium salt, disodium salt, monopotassium salt, and dipotassium salt, and more preferably contains at least one of monosodium salt and disodium salt.

[0016] The content of component (A) in the composition is preferably 1% by mass or more, more preferably 2% by mass or more, and still more preferably 3% by mass or more based on the whole composition. Thereby, the detergency can be improved. Also, the content of component (A) in the composition is preferably 15% by mass or less, more preferably 10% by mass or less, and still more preferably 5% by mass or less based on the whole composition. Thereby, the discharge stability at a lower storage temperature can be further improved.

[0017] (Component (B)) Component (B) is an acylmethyltaurine salt, specifically, a salt of a condensate of N-methyltaurine and a fatty acid.

[0018] The acyl group in component (B) is preferably derived from a fatty acid having 8 or more carbon atoms, and preferably from a fatty acid having 24 or less carbon atoms, more preferably 22 or less carbon atoms, still more preferably 20 or less carbon atoms, and even more preferably 18 or less carbon atoms. Thereby, a composition excellent in discharge stability at low temperature and combability after hair washing can be obtained more stably. The above fatty acid may contain at least one of saturated fatty acids and unsaturated fatty acids. Also, the above fatty acid may contain at least one of linear fatty acids and branched fatty acids. The above fatty acid is, for example, one or more selected from the group consisting of lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, beef tallow fatty acid, coconut oil fatty acid, and palm kernel oil fatty acid, and is preferably coconut oil fatty acid. Also, the acyl group preferably contains one or more selected from the group consisting of lauroyl group, myristoyl group, and cocoyl group, more preferably contains at least one of lauroyl group and cocoyl group, and still more preferably is cocoyl group.

[0019] The salts in component (B) are, for example, alkali metal salts such as lithium salts, sodium salts, potassium salts; alkaline earth metal salts such as calcium salts, magnesium salts; alkanolamine salts such as monoethanolamine salts, diethanolamine salts, triethanolamine (TEA) salts; ammonium salts; and basic organic substance salts such as sodium taurine salts, and are one or more selected from the group consisting of these, preferably alkali metal salts, and more preferably at least one selected from the group consisting of sodium salts and potassium salts. Thereby, the availability of component (B) can be improved.

[0020] Component (B) is preferably at least one compound selected from the group consisting of sodium cocoamido methyl taurate and sodium cocoamido methyl taurine taurate, and more preferably sodium cocoamido methyl taurate. Thereby, the discharge stability at low temperatures and the combability after shampooing can be made more preferable.

[0021] The content of component (B) in the composition is preferably 0.5% by mass or more, more preferably 1% by mass or more, still more preferably 1.5% by mass or more, even more preferably 2% by mass or more, and even more preferably 3% by mass or more, based on the whole composition. Thereby, the discharge stability at a lower storage temperature can be further improved. Also, the content of component (B) in the composition is preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 5% by mass or less, and even more preferably 3% by mass or less, based on the whole composition. Thereby, the discharge stability at low temperatures can be further improved.

[0022] The total content of the anionic surfactant in the composition is preferably 2% by mass or more, more preferably 3% by mass or more, still more preferably 4% by mass or more, and even more preferably 5% by mass or more, based on the whole composition. Thereby, the detergency can be improved. In addition, the total content of the anionic surfactant in the composition is preferably 30% by mass or less, more preferably 20% by mass or less, still more preferably 10% by mass or less, and even more preferably 7% by mass or less, based on the entire composition. Thereby, the discharge stability at low temperatures can be further improved.

[0023] The mass ratio ((A) / (B)) of the content of component (A) to the content of component (B) in the composition is preferably 0.25 or more, more preferably 0.4 or more, and still more preferably 0.45 or more. Thereby, the combability after hair washing can be made more preferable. Also, the above mass ratio ((A) / (B)) is preferably 4 or less, more preferably 3 or less, still more preferably 2.5 or less, and even more preferably 2 or less. Thereby, the foam discharge property at low temperatures can be improved even when the composition is stored at a lower temperature.

[0024] The composition may contain components other than components (A) and (B). For example, the composition may further contain a surfactant other than components (A) and (B). Specific examples of the surfactant other than components (A) and (B) include an anionic surfactant other than components (A) and (B), an amphoteric surfactant (component (C) described later), a nonionic surfactant, and a cationic surfactant. Here, it is preferable that the composition does not contain an anionic surfactant other than components (A) and (B). Thereby, the irritation to the skin can be further reduced.

[0025] (Component (C)) Component (C) is an amphoteric surfactant. When the composition further contains component (C), the foam quality can be further improved. Also, the discharge stability at a lower storage temperature can be further improved. Specific examples of component (C) include at least one selected from the group consisting of betaine-type amphoteric surfactants; and lecithins. As betaine-type amphoteric surfactants, specifically, alkylamide hydroxysulfobetaine-type (sultaine-type) surfactants such as lauric acid amide propyl hydroxy sulfobetaine, alkyl hydroxy sulfobetaine-type surfactants such as lauryl hydroxy sulfobetaine (lauryl hydroxy sultaine), lauryl dimethylamino acetic acid betaine, coconut oil dimethylamino acetic acid betaine, coconut oil fatty acid dimethylamino acetic acid betaine, lauric acid amide propyl dimethylamino acetic acid betaine, amino acetic acid betaine-type surfactants such as hydroxyalkyl (C12-14) hydroxyethyl sarcosine; Imidazolinium betaine-type surfactants such as sodium salts of coco ampho acetic acid, lauro ampho acetic acid, coco ampho diacetic acid, lauro ampho diacetic acid, lauramino propionic acid, etc.; Alkyl betaine-type surfactants such as coco betaine, lauryl betaine, etc.; One or more selected from the group consisting of fatty acid amide propyl betaine-type (carbobetaine-type) surfactants such as cocoamidopropyl betaine, lauroamidopropyl betaine, myristamidopropyl betaine, etc. may be mentioned. In addition, as lecithins, specifically, one or more selected from the group consisting of lecithin, hydrogenated lecithin, lysophosphatidylcholine, hydrogenated lysophosphatidylcholine may be mentioned.

[0026] Component (C) preferably contains a betaine-type amphoteric surfactant, more preferably contains one or more surfactants selected from the group consisting of amino acetic acid betaine-type surfactants and fatty acid amide propyl betaine-type surfactants, and even more preferably contains at least one of cocoamidopropyl betaine and lauryl hydroxy sultaine. It is also preferable to contain both of these. Thereby, the discharge stability at low temperature and the combability after hair washing can be further enhanced.

[0027] The content of component (C) in the composition is preferably 0.1% by mass or more, more preferably 1% by mass or more, still more preferably 1.5% by mass or more, and even more preferably 2% by mass or more with respect to the whole composition. Thereby, the discharge stability at low temperatures and the foam quality of the foam discharged from the foam container can be made more preferable. Also, the content of component (C) in the composition is preferably 8% by mass or less, more preferably 6% by mass or less, and still more preferably 4% by mass or less with respect to the whole composition. Thereby, the slimy feeling during hair washing can be suppressed, and the composition can be more easily washed away from the hair.

[0028] The content of component (C) in the composition is, for example, 0.1 or more, preferably 0.25 or more, more preferably 0.3 or more, and still more preferably 0.5 or more in terms of the mass ratio to the total amount of the anionic surfactant and nonionic surfactant contained in the composition. Thereby, the combability after hair washing can be made more preferable. Also, the content of component (C) may be, for example, 1 or less in terms of the mass ratio to the total amount of the anionic surfactant and nonionic surfactant contained in the composition.

[0029] (Nonionic surfactant) Specific examples of the nonionic surfactant include esters such as glycerin fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyethylene glycol fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, and sucrose fatty acid ester; Ethers such as alkyl polyethylene glycol, polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene phytostanol ether, polyoxyethylene phytosterol ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, and sugar ether; Silicone nonionic surfactants such as polyoxyalkylene-modified organopolysiloxane and polyoxyalkylene-alkyl copolymer-modified organopolysiloxane; Fatty acid alkanolamides such as diethanolamide laurate, diethanolamide coconut oil fatty acid, N-methylethanolamide coconut oil fatty acid (cocamidomethyl MEA), monoethanolamide coconut oil fatty acid (cocamide MEA), polyoxyethylene monoethanolamide coconut oil fatty acid, monoisopropanolamide laurate, monoisopropanolamide coconut oil fatty acid, and polyoxypropylene monoisopropanolamide coconut oil fatty acid, and alkanolamides such as alkanolamide; One or more selected from the group consisting of polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil; and alkyl glycoside. As the above polyglycerol fatty acid ester, not only monoesters but also those having a plurality of ester bonds such as diesters and triesters can be used.

[0030] The number of carbon atoms of the above fatty acid or the above alkyl group in the nonionic surfactant is, for example, 6 or more, preferably 8 or more, more preferably 10 or more, still more preferably 12 or more, even more preferably 14 or more, even more preferably 16 or more, and preferably 24 or less, more preferably 22 or less, still more preferably 20 or less. In addition, examples of the linear or branched fatty acids having 8 to 20 carbon atoms in the nonionic surfactant include saturated fatty acids such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, and arachidic acid; unsaturated fatty acids such as palmitoleic acid, oleic acid, elaidic acid, linoleic acid, and linolenic acid; and fatty acid mixtures such as coconut oil fatty acid, palm oil fatty acid, palm kernel oil fatty acid, soybean oil fatty acid, sunflower oil fatty acid, grape seed oil fatty acid, apricot kernel oil fatty acid, beef tallow fatty acid, and hydrogenated beef tallow fatty acid. Among these, those preferably used are unsaturated fatty acids or fatty acid mixtures containing unsaturated fatty acids, more preferably linoleic acid, soybean oil fatty acid, sunflower oil fatty acid, grape seed oil fatty acid, apricot kernel oil fatty acid, etc., and apricot kernel oil fatty acid is even more preferred.

[0031] When the nonionic surfactant has a structure of at least one of polyoxyethylene and polyoxypropylene, the total number of moles of addition of polyoxyethylene and polyoxypropylene in the nonionic surfactant is preferably 1 or more, more preferably 3 or more, still more preferably 5 or more, further preferably 10 or more, even more preferably 15 or more, and is preferably 120 or less, more preferably 100 or less, still more preferably 60 or less, even more preferably 50 or less, even more preferably 30 or less, and still more preferably 20 or less.

[0032] The nonionic surfactant preferably contains one or more selected from the group consisting of glycerin fatty acid esters, polyglycerin fatty acid esters (e.g., polyglyceryl-10 laurate, apricot kernel oil polyglyceryl-6 esters), and fatty acid alkanolamides, and more preferably contains one or more selected from the group consisting of glycerin fatty acid esters, polyglycerin fatty acid esters, and coconut oil fatty acid monoethanolamide. Thereby, the combability after hair washing, the foam quality, the foam retention, and the detergency of the foam discharged from the former container can be made more preferable. From the same point of view, it is also preferable that the nonionic surfactant contains a combination of two or more selected from the group consisting of glycerin fatty acid esters, polyglycerin fatty acid esters, and coconut oil fatty acid ethanolamides. For example, it is also preferable to contain them in a combination of two or three kinds.

[0033] The content of the nonionic surfactant in the composition is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, based on the whole composition. Thereby, the combability after shampooing, the foam quality, the foam retention, and the detergency of the foam discharged from the foam container can be made more preferable. Also, the content of the nonionic surfactant in the composition is preferably 8% by mass or less, more preferably 6% by mass or less, based on the whole composition. Thereby, the squeaking feeling of the hair can be suppressed.

[0034] (Cationic surfactant) The composition may further contain a cationic surfactant. Specific examples of the cationic surfactant include amines such as alkylamines such as dimethylaminopropylamide stearate (for example, stearamidopropyldimethylamine, behenamidopropyldimethylamine); Quaternary ammonium salts such as stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, cetyltrimethylammonium chloride, distearyldimethylammonium chloride, dibehenyldimethylammonium chloride, dicetyldimethylammonium chloride, stearyldimethylbenzylammonium chloride, dilauryl dimethylammonium chloride, dipolyoxyethylene (15 EO) coconut oil alkylmethylammonium chloride, dipolyoxyethylene (4 EO) lauryl ether dimethylammonium chloride, dicocoylethylhydroxyethylmonium sulfate, distearoylethylhydroxyethylmonium methosulfate, dipalmitoylethylhydroxyethylmonium methosulfate, palmitamidopropyltrimonium chloride; Pyridinium salts; and One or more selected from the group consisting of imidazolium salts are included.

[0035] The cationic surfactant preferably contains an amine, more preferably contains an alkylamine, and even more preferably contains at least one of stearamidopropyldimethylamine and behenamidopropyldimethylamine. Thereby, the combability after shampooing can be made more preferable.

[0036] The content of the cationic surfactant in the composition is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, based on the whole composition. Thereby, the combability after shampooing can be made more preferable. Also, the content of the cationic surfactant in the composition is preferably 1% by mass or less, more preferably 0.5% by mass or less, even more preferably 0.3% by mass or less, based on the whole composition. Thereby, the foam quality and foaming property of the foam discharged from the former container can be made more preferable.

[0037] The composition may also contain at least one of the following components (D) and (E). (D) Polyhydric alcohol (E) Cationic polymer

[0038] (Component (D)) Component (D) is a polyhydric alcohol. By further containing component (D) in the composition, the bundling of hair strands after shampooing and drying can be made preferable. Specific examples of component (D) include glycerins such as glycerin, diglycerin, and polyglycerin; Sugar alcohols such as sorbitol, erythritol, and xylitol; One or more selected from the group consisting of glycols such as isoprene glycol, 1,2 - propylene glycol (PG), dipropylene glycol (DPG), polyethylene glycol (PEG), ethoxydiglycol, 1,3 - butylene glycol (BG), and diethylene glycol monoethyl ether are included.

[0039] Component (D) is preferably a polyhydric alcohol having a molecular weight of 150 or less, more preferably one or more compounds selected from the group consisting of BG, DPG, and glycerin. Thereby, the discharge stability at low temperatures can be further improved.

[0040] The content of component (D) in the composition is preferably 1% by mass or more, more preferably 5% by mass or more, and still more preferably 8% by mass or more based on the total composition. Thereby, the combability after shampooing can be made more preferable. Also, the content of component (D) in the composition is preferably less than 22% by mass, more preferably 20% by mass or less, still more preferably 15% by mass or less, and even more preferably 12% by mass or less based on the total composition. Thereby, the combability after shampooing can be made more preferable. Also, stickiness of the hair after shampooing can be suppressed.

[0041] (Component (E)) Component (E) is a cationic polymer. By further including component (E) in the composition, the combability after shampooing can be made more preferable. Specific examples of component (E) include cationized celluloses such as O-[2-hydroxy-3-(trimethylammonio)propyl] hydroxyethyl cellulose chloride (polyquaternium-10); Copolymers of vinylpyrrolidone and (meth)acrylic compounds such as vinylpyrrolidone-N,N-dimethylaminoethyl methacrylate copolymer diethyl sulfate; Polymers of diallyldimethylammonium chloride and copolymers with (meth)acrylic monomers such as diallyldimethylammonium chloride, dimethyldiallylammonium chloride·acrylic acid copolymer (polyquaternium-22), dimethyldiallylammonium chloride·acrylic acid·acrylamide copolymer (polyquaternium-39), diallyldimethylammonium chloride·acrylamide copolymer (polyquaternium-7); and One or more selected from the group consisting of polymers of methacrylamidopropyltrimethylammonium chloride and copolymers with (meth)acrylic monomers, such as poly(methacrylamidopropyltrimethylammonium chloride), copolymers of methacrylamidopropyltrimethylammonium chloride / acrylic acid / methyl acrylate, and copolymers of methacrylamidopropyltrimethylammonium chloride / acrylic acid / acrylamide. Here, the (meth)acrylic compound is specifically at least one of an acrylic compound and a methacrylic compound. The (meth)acrylic compound is specifically a compound having a (meth)acrylic skeleton, and more specifically, (meth)acrylic acid; alkyl (meth)acrylates such as methyl (meth)acrylate and ethyl (meth)acrylate; and (meth)acrylamide.

[0042] Component (E) preferably contains one or more selected from the group consisting of polyquaternium-10, polyquaternium-22, polyquaternium-7, and polyquaternium-39. Thereby, the combability after shampooing can be made more preferable. The content of component (E) in the composition is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, still more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more based on the whole composition. Thereby, the combability after shampooing can be made more preferable. Also, the content of component (E) in the composition is preferably 8% by mass or less, more preferably 5% by mass or less, still more preferably 2% by mass or less, and even more preferably 1% by mass or less based on the whole composition. Thereby, the coarseness of the hair can be suppressed.

[0043] (Water) The composition may further contain water. The water content in the composition can be, for example, the remainder after removing components other than water in the composition. In addition, the water content in the composition is preferably 60% by mass or more, more preferably 70% by mass or more, also preferably 85% by mass or more, and more preferably 80% by mass or less, based on the entire composition. Thereby, it is possible to improve the balance of the effects of reducing the discharge stability at low temperatures, the combability after shampooing, and the irritation to the skin.

[0044] The composition may further contain components other than those described above. Specific examples of such components include oils such as alcohols having 12 to 24 carbon atoms, hydrocarbon oils, ester oils, fats and oils, silicones, vegetable fats and oils, animal fats and oils, mineral fats and oils, and natural oil derivatives; water-soluble polymers; humectants; animal and plant extracts; amino acids; nucleic acids; vitamins; enzymes; anti-inflammatory agents; bactericides; preservatives; antioxidants; cooling agents; dyes; chelating agents; pH adjusters such as organic acids, inorganic acids, hydroxides of alkali metals, and hydroxides of alkaline earth metals; pearlescent agents; and fragrances. The components incorporated into the composition may be raw materials described in various official documents such as the Cosmetics Raw Material Standards, the Cosmetics Category-Specific Blending Component Standards, the Quasi-Drug Raw Material Standards, the Japanese Pharmacopoeia, the Japanese Pharmacopoeia Excipients Component Standards, and the Food Additives Codex.

[0045] (Viscosity) The viscosity of the composition measured by a B-type viscometer at 25°C is 500 mPa·s or less, preferably 300 mPa·s or less, more preferably 200 mPa·s or less, and even more preferably 100 mPa·s or less. Thereby, it is possible to improve the discharge stability at low temperatures. In addition, the above viscosity of the composition may be, for example, 1 mPa·s or more or 5 mPa·s or more.

[0046] The viscosity of the composition measured by a B-type viscometer immediately after storage at 5°C for 1 day is preferably 500 mPa·s or less, preferably 300 mPa·s or less, more preferably 200 mPa·s or less, and even more preferably 100 mPa·s or less. Thereby, it is possible to improve the discharge stability at low temperatures. In addition, the above viscosity of the composition may be, for example, 1 mPa·s or more or 5 mPa·s or more. The viscosity of the composition immediately after storage at 5°C for 1 day is specifically the viscosity measured within 1 minute after taking it out at room temperature (25°C, the same hereinafter), preferably the viscosity of the composition at 5°C.

[0047] The viscosity of the composition measured by a B-type viscometer immediately after storage at 5°C for 1 week is preferably 500 mPa·s or less, preferably 300 mPa·s or less, more preferably 200 mPa·s or less, and even more preferably 100 mPa·s or less. Thereby, the discharge stability at low temperature can be improved. Also, the above viscosity of the composition may be, for example, 1 mPa·s or more or 5 mP·s or more. The viscosity of the composition immediately after storage at 5°C for 1 week is specifically the viscosity measured within 1 minute after taking it out at room temperature, preferably the viscosity of the composition at 5°C.

[0048] Here, the viscosity of the composition is measured at each of the above temperatures using a B-type viscometer (for example, TVB-25L manufactured by Toki Sangyo Co., Ltd.) under the conditions of rotor M1, 60 rpm (however, 30 rpm when it is 100 mPa·s or more, 12 rpm when it is 200 mPa·s, and 6 rpm when it is 500 mPa·s or more) and a measurement time of 1 minute.

[0049] (pH) The pH of the composition at 25°C is preferably 4.5 or more, more preferably 5.0 or more, and even more preferably 5.5 or more. Thereby, the irritation to the skin can be reduced. Also, the above pH is preferably 7.0 or less, more preferably 6.5 or less. Thereby, while making the pH of the composition close to the pH of the skin, the detergency can be ensured.

[0050] Next, a method for producing the composition will be described. The composition can be produced, for example, by blending components (A), (B) and other components as appropriate to obtain a mixture. In the production process, the components or the mixture may be heated.

[0051] The composition obtained in this embodiment is filled in a former container and used. Examples of the former container include non-gas type (non-aerosol) former containers such as pump formers and squeeze formers; and aerosol containers such as aerosol cans. A non-gas type former container is preferred in that it does not require a propellant.

[0052] (Hair shampoo) In this embodiment, the hair shampoo is obtained by filling the hair shampoo composition in this embodiment into a former container. That is, the hair shampoo has a hair shampoo composition and a former container.

[0053] In this embodiment, by filling a composition containing components (A) and (B) and having a viscosity within the above range into a former container and using it, the discharge stability of the composition at low temperatures can be made excellent, and the combability after hair washing can also be made preferable. More specifically, according to this embodiment, even when the composition is stored at a low temperature of about 5°C and immediately taken out, it is possible to suitably suppress an excessive increase in the pressing force when discharging from the former container. Also, in this embodiment, even when the composition is stored at a low temperature of about 5°C and immediately taken out, the appearance of the composition can be made preferable. More specifically, it is also possible to suitably suppress clouding, precipitation, or thickening of the composition. Also, according to this embodiment, for example, it is also possible to make the quality of the foam discharged from the former container preferable.

[0054] 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 also be adopted.

Examples

[0055] Hereinafter, the present embodiment will be specifically described with reference to examples, but the present embodiment is not limited to these examples.

[0056] (Examples 1 to 12, Comparative Example 1) In this example, a hair cleansing composition filled in a former container was prepared and evaluated. The formulations and results are shown in Table 1.

[0057] (Method for Preparing the Composition) The components listed in Table 1 were mixed and dissolved by heating (80 to 85°C), and then cooled with water to obtain the compositions of each example.

[0058] (pH) The pH of the compositions obtained in each example was measured at 25°C using a glass electrode type hydrogen ion concentration meter (manufactured by Horiba, Ltd.). As shown in Table 1, the pH of the compositions in all examples was in the range of 5.5 to 7.0.

[0059] (Viscosity) The viscosity of the compositions obtained in each example was measured under the following conditions. Container: 100 g vial Filling amount: 100 g Measuring device: TVB-25L (manufactured by Toki Sangyo Co., Ltd., B-type viscometer) SPINDLE NO.: M1 SPEED: 3 rpm for Comparative Example 1, 30 rpm for Example 10, and 60 rpm for all other examples TIME: 1 min RANGE: M

[0060] Timing of measurement: Immediately after preparing the composition (25°C); After storing at 5°C for 24 hours and taking out (within 1 minute at room temperature); After storing at 5°C for 1 week and taking out (starting measurement within 1 minute at room temperature)

[0061] The viscosities measured at each timing were evaluated according to the following criteria. A: 200 mPa·s ≥ viscosity B: 500 mPa·s ≥ viscosity > 200 mPa·s C: viscosity > 500 mPa·s

[0062] (Pressing) The compositions of each example were filled into the following non-gas type former containers, and the pump pressure was measured when stored at 5°C for 24 hours and 1 week. The measurement was performed immediately after taking out (without returning to room temperature and within 1 minute at room temperature) after storage at 5°C. Product name: PEPI-100 No.5 white and corresponding pump member Manufacturer: TAKEMOTO Discharge volume: 0.75 mL Capacity: 115 mL

[0063] The obtained pressure (unit: N) was evaluated according to the following criteria. A: 25 ≥ pressure B: 30 ≥ pressure > 25 C: 40 ≥ pressure > 30 D: pressure > 40

[0064] (Appearance) The appearance when the compositions of each example were filled into a transparent container was visually evaluated according to the following criteria. The evaluation was performed immediately after preparation (25°C) and immediately after taking out (without returning to room temperature and within 1 minute at room temperature) after storage at 5°C for 24 hours. A: Colorless and transparent B: Translucent (within allowable range) C: Cloudy, thickened, precipitated (outside allowable range)

[0065] (Foam quality) The bubbles formed when the compositions of each example were discharged from a pump former container similar to that during the pressure measurement were observed with a microscope (KEYENCE VHX-7100, 80 times magnification), and the foam quality was visually evaluated. The evaluation was performed at room temperature after storing at 5°C overnight. The evaluation criteria are shown below. A: Bubbles are uniform and fine B: Bubbles are slightly uniform and slightly fine C: Bubbles are slightly non-uniform and slightly coarse (within allowable range) D: Bubbles are non-uniform and coarse (outside allowable range)

[0066] (Comb-through evaluation) The compositions obtained in each example were filled into a pump former container similar to that during the pressure measurement. To the evaluation tuft of hair (sample described later), 0.75 mL of the composition obtained in each example was discharged and applied to the hair. After washing 10 times by passing a finger from the root to the tip of the hair, it was rinsed 15 times by passing a finger from the root to the tip of the hair with warm water at 40°C. Then, it was dried with a hair dryer (1200 W) while passing a comb until the hair was dry. The tuft of hair after washing and drying was set on the moving table of the following equipment while holding one side. After adjusting the measuring part to a horizontally fixed state so that the hair was caught by the comb, the resistance (unit: gf) when dissolving the hair with the comb by the linear movement of the moving table was measured. Measuring equipment: Static and dynamic friction measuring machine (TL201Tt, manufactured by Trinity Labo Co., Ltd.) Jig: Comb holder, moving table Sample: Hair (human hair, manufactured by Biolux Co., Ltd.) Measurement distance: 70 mm Measurement speed: 10 mm / sec Sampling speed: 10 mm / sec Load: 0 g

[0067] The evaluation criteria are shown below. A: 5 ≥ load B: 12 ≥ load > 5 C: 15 ≥ load > 12 D: load > 15

[0068]

Table 1

[0069] From Table 1, in each example, the balance of each effect of pressing, appearance, foam quality, and combability immediately after storage at 5°C was excellent compared to the comparative example. In addition, when comparing the appearance after storage at a lower temperature for Examples 1 to 4, in Examples 1, 2, and 4, the appearance immediately after taking out was more favorable when the storage temperatures were set to 0°C and -5°C, which were lower than those in Example 3 with a larger mass ratio ((A) / (B)).

[0070] (Formulation Examples 1 to 4) The hair cleansing composition in this example is filled in a former container and used. In each example, the viscosity measured by a B-type viscometer immediately after storage at 5°C for 1 day is all 500 mPa·s or less, and the pH at 25°C is all in the range of 4.5 or more and 7.0 or less.

[0071] [Table 2]

Claims

1. Containing the following components (A) and (B), having a viscosity of 500 mPa·s or less as measured by a B-type viscometer at 25°C, A hair cleansing composition filled in a former container for use. (A) Acidic N-acyl amino acid salt (B) Acyl methyl taurine salt

2. The hair cleansing composition according to claim 1, having a viscosity of 500 mPa·s or less as measured by a B-type viscometer immediately after storage at 5°C for 1 day.

3. The hair cleansing composition according to claim 1 or 2, wherein the mass ratio ((A) / (B)) of the content of the component (A) to the content of the component (B) in the hair cleansing composition is 0.25 or more and 4 or less.

4. The hair cleansing composition according to claim 1 or 2, wherein the component (A) contains N-acyl glutamate.

5. The hair cleansing composition according to claim 1 or 2, wherein the component (B) is at least one compound selected from the group consisting of sodium cocoyl methyl taurine and sodium cocoyl methyl taurine taurine.

6. The hair cleansing composition according to claim 1 or 2, further comprising component (C): an amphoteric surfactant.

7. The hair cleansing composition according to claim 6, wherein the content of the component (C) in the hair cleansing composition is 0.25 or more in terms of the mass ratio to the total amount of anionic surfactant and nonionic surfactant contained in the hair cleansing composition.

8. The hair cleansing composition according to claim 6, wherein the component (C) contains a betaine-type amphoteric surfactant.

9. The hair cleansing composition according to claim 1 or 2, further comprising component (D): a polyhydric alcohol.

10. The hair cleansing composition according to claim 9, wherein the content of the component (D) in the hair cleansing composition is less than 22% by mass based on the whole hair cleansing composition.

11. The hair cleansing composition according to claim 1 or 2, further comprising a component (E): a cationic polymer.

12. The hair cleansing composition according to claim 11, wherein the component (E) contains one or more selected from the group consisting of polyquaternium-10, polyquaternium-22, polyquaternium-7, and polyquaternium-39.

13. The hair cleansing composition according to claim 1 or 2, having a pH at 25 ° C of 4.5 or more and 7.0 or less.

14. The hair cleansing composition according to claim 1 or 2, wherein the former container is a non-gas type.

15. A hair cleansing agent, wherein the hair cleansing composition according to claim 1 or 2 is filled in a former container.

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