Hair cleaning agent composition

Abstract

Provided is a hair cleansing agent composition which has a viscosity suitable for use as a cleansing agent, has low-temperature stability, and has a wide range of foam during hair washing. The hair cleaning agent composition comprises (A) a surfactant represented by formula (1), (B) an anionic surfactant other than component (A), (C) an amphoteric surfactant, (D) a compound represented by formula (2), (E) a compound represented by formula (3) or a salt thereof, and water, and the content of component (A) is 0.1-10% by mass, the content of component (B) is 1-20% by mass, and the content of component (C) is 1-20% by mass relative to the whole hair cleaning agent composition. 0.1-5 mass% of component (D), 0.001-1.0 mass% of component (E), the mass ratio of (A) / (B) being 0.1-0.9, the mass ratio of {(A) + (B) / (C) being 0.2-4, and the mass ratio of (A) / (E) being 15-300 (wherein the symbols are as defined in the description).

Description

Technical Field

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

[0002] In recent years, due to reasons such as moderate detergency and less irritation, hair cleansing agents containing amino acid-based surfactants have been increasing. One of the problems widely mentioned for hair cleansing agents containing such amino acid-based surfactants is that it is difficult to achieve a viscosity suitable for use as a cleansing agent. In response to this problem, for example, Patent Document 1 discloses a shampoo composition containing a taurate of N-acylmethyltaurine and an alkylene oxide derivative. The shampoo composition of Patent Document 1 has a viscosity suitable for use while held in the hand.

[0003] On the other hand, in recent years, there has been an increasing focus on the appearance of hair cleansing agents, and transparent products are required. Although the shampoo composition of Patent Document 1 has a moderate viscosity, there are cases where the maintenance of transparency of the appearance is poor.

[0004] In contrast, for example, Patent Document 2 discloses a cleansing agent composition containing an N-long-chain aliphatic acyl amino acid or its salt, a polyol monofatty acid ester, a hydrophobic modified product of a long-chain PEG, and an aliphatic alkanolamide. The cleansing agent composition of Patent Document 2 exhibits a viscosity suitable for use and shows a transparent appearance under room temperature conditions. However, the cleansing agent composition of Patent Document 2 cannot maintain transparency in winter. That is, the cleansing agent composition of Patent Document 2 has poor transparency (low-temperature stability) at low temperatures.

[0005] In addition, for people with hair longer than the shoulders, in order to obtain a comfortable cleansing feeling, a large amount of hair cleansing agent is required. One of the reasons for this is that the hair cleansing agent foams immediately where it adheres to the hair, and the hair cleansing agent cannot be spread, resulting in less hair cleansing agent available for foaming in other areas. Although the cleansing agent composition of Patent Document 2 has a viscosity suitable for use as a cleansing agent, there are cases where it foams immediately when it adheres to wet hair and the preparation is diluted, and the foam cannot reach from the roots to the tips of long hair.

[0006] Therefore, there is a need for a hair cleansing agent composition that has a viscosity suitable for use as a cleansing agent, has low-temperature stability to maintain a transparent appearance even at low temperatures in winter, and can produce foam that spreads over a large area of hair during hair washing.

[0007] Prior Art Documents

[0008] Patent Documents

[0009] Patent Document 1: WO2017 / 007003A1

[0010] Patent Document 2: CN108403472A. Summary of the Invention

[0011] Problems to be Solved by the Invention

[0012] An object of the present invention is to provide a hair cleaning agent composition having a viscosity suitable for use as a cleaning agent, having low-temperature stability capable of maintaining a transparent appearance even at low temperatures in winter, and having a foam that can spread over a wide range during hair washing. It should be noted that in this specification, the "hair cleaning agent composition" refers to a cleaning agent composition for hair cleaning.

[0013] Means for Solving the Problems

[0014] The inventors of the present invention conducted in-depth research and found that by combining the following components (A) to (E) in a specific mass ratio, the above object can be achieved.

[0015] Based on the above findings, the present invention is as follows.

[0016] [1] A hair cleaning agent composition comprising the following components (A) to (E) and water:

[0017] (A): A surfactant represented by the formula (1),

[0018]

[0019] (In the formula, R 1 CO represents an aliphatic acyl group having 8 to 22 carbon atoms,

[0020] R 2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,

[0021] M n+ represents an alkali metal ion, an alkaline earth metal ion, an ammonium ion or an organic ammonium ion,

[0022] n represents 1 or 2.)

[0023] (B): An anionic surfactant other than component (A),

[0024] (C): An amphoteric surfactant,

[0025] (D): A compound represented by the formula (2),

[0026]

[0027] (In the formula, R 3 CO represents an aliphatic acyl group having 8 to 14 carbon atoms,

[0028] BO represents oxybutylene,

[0029] m represents a number from 1 to 2.)

[0030] (E): The compound represented by formula (3) or a salt thereof,

[0031]

[0032] (In the formula, R 4 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.)

[0033] Relative to the entire hair cleansing composition, the content of component (A) is 0.1 to 10% by mass, the content of component (B) is 1 to 20% by mass, the content of component (C) is 1 to 20% by mass, the content of component (D) is 0.1 to 5% by mass, and the content of component (E) is 0.001 to 1.0% by mass,

[0034] The mass ratio of (the content of component (A)) / (the content of component (B)) is 0.1 to 0.9,

[0035] The mass ratio of (the sum of the content of component (A) and the content of component (B)) / (the content of component (C)) is 0.2 to 4, and

[0036] The mass ratio of (the content of component (A)) / (the content of component (E)) is 15 to 300.)

[0037] Advantages of the Invention

[0038] The hair cleansing composition of the present invention (hereinafter sometimes simply referred to as "cleansing composition") has the following advantages: It has a viscosity suitable for use as a cleansing agent, and at the same time has low-temperature stability to maintain a transparent appearance even at low temperatures in winter, and the foam during hair washing can cover a wide range.) Detailed Embodiments

[0039] Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the embodiments described in this specification, and various modifications can be made without departing from the gist of the present invention. It should be noted that the numerical ranges specified by "~" in this specification include the values at both ends (the upper limit and the lower limit) of "~". For example, "2 to 5" means "2 or more and 5 or less".)

[0040] The cleansing composition of the present invention includes components (A) to (E) and water. Each component in the cleansing composition of the present invention can be used alone in any one kind, or two or more kinds can be used simultaneously. For example, when there are two or more kinds of component (A), the "content of component (A)" means "the sum of the contents of two or more kinds of component (A)". The "content of component (B)" and the like have the same meaning as the "content of component (A)".)

[0041] [Component (A)]

[0042] Component (A) is a surfactant represented by the following formula (1).

[0043]

[0044] Hereinafter, the definitions of the symbols in formula (1) will be described in sequence.

[0045] R in formula (1) 1 CO represents an aliphatic acyl group having 8 to 22 carbon atoms, preferably an aliphatic acyl group having 8 to 18 carbon atoms. In the present specification, "aliphatic acyl group (RCO)" refers to an acyl group derived from a fatty acid (aliphatic carboxylic acid). In the present specification, the acyl group may be linear or branched.

[0046] Examples of the aliphatic acyl group having 8 to 22 carbon atoms include octanoyl, decanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, oleoyl, docosanoyl, etc. In addition, the aliphatic acyl group having 8 to 22 carbon atoms may also be an acyl group derived from mixed fatty acids. Examples of the acyl group derived from mixed fatty acids include coconut oil fatty acid acyl group and palm kernel oil fatty acid acyl group.

[0047] R 1 CO is preferably lauroyl, myristoyl, coconut oil fatty acid acyl group or palm kernel oil fatty acid acyl group, more preferably lauroyl, coconut oil fatty acid acyl group or palm kernel oil fatty acid acyl group, and further preferably lauroyl or coconut oil fatty acid acyl group.

[0048] R in formula (1) 2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. In the present specification, the alkyl group may be linear or branched. Examples of the alkyl group having 1 to 4 carbon atoms include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, etc.

[0049] R 2 is preferably a hydrogen atom, methyl or ethyl, and more preferably a hydrogen atom or methyl.

[0050] M in formula (1) n+ represents an alkali metal ion, an alkaline earth metal ion, an ammonium ion or an organic ammonium ion. n represents 1 or 2, preferably 1. In the present specification, "ammonium ion" refers to N + H4, and the organic ammonium ion refers to N + R4 (in the formula, one of the four Rs represents an organic group, and the remaining three represent a hydrogen atom or an organic group).

[0051] Examples of the alkali metal ions include sodium ions, potassium ions, etc. Examples of the alkaline earth metal ions include magnesium ions, calcium ions, etc. Examples of the organic ammonium ions include monoethanolammonium ions, diethanolammonium ions, triethanolammonium ions, etc.

[0052] M n+ Preferably, they are sodium ions, potassium ions, triethanolammonium ions; more preferably, they are sodium ions or triethanolammonium ions; still more preferably, they are sodium ions.

[0053] Component (A) is preferably at least one selected from sodium N-lauroyl-β-alaninate, sodium N-coconut oil fatty acyl-β-alaninate, sodium N-lauroyl-N-methyl-β-alaninate, triethanolamine N-lauroyl-N-methyl-β-alaninate, sodium N-coconut oil fatty acyl-N-methyl-β-alaninate, and sodium N-lauroyl-N-ethyl-β-alaninate; more preferably, it is at least one selected from sodium N-coconut oil fatty acyl-β-alaninate, sodium N-lauroyl-N-methyl-β-alaninate, triethanolamine N-lauroyl-N-methyl-β-alaninate, and sodium N-coconut oil fatty acyl-N-methyl-β-alaninate; still more preferably, it is sodium N-coconut oil fatty acyl-β-alaninate, sodium N-lauroyl-N-methyl-β-alaninate, or triethanolamine N-lauroyl-N-methyl-β-alaninate.

[0054] Relative to the whole cleaning agent composition of the present invention, the content of component (A) is 0.1 to 10% by mass, preferably 0.5 to 8% by mass, more preferably 1 to 6% by mass. When the content of component (A) is too small, the viscosity of the cleaning agent composition may become too low, and the range covered by the foam during shampooing is small. When the content of component (A) is too large, the viscosity of the cleaning agent composition may become too high, and its low-temperature stability is poor.

[0055] [Component (B)]

[0056] Component (B) is an anionic surfactant other than component (A). Examples of the anionic surfactant other than component (A) include alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkylamide ether sulfates, polyoxyethylene amide ether sulfates, polyoxyethylene alkyl ether acetates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, α-olefin sulfonates, higher fatty acid salts, N-acyl amino acid salts other than component (A), N-acyl hydroxyethyl sulfonates, N-acyl methyl taurates, N-acyl polypeptide salts, alkyl sulfosuccinates, etc. Among these anionic surfactants, alkyl sulfates, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl ether acetates, α-olefin sulfonates, N-acyl methyl taurates, and N-acyl amino acid salts other than component (A) are preferred.

[0057] The number of carbon atoms of the alkyl group and the acyl group that the anionic surfactant other than the component (A) may have is preferably 10 to 18, more preferably 12 to 14. It should be noted that the alkyl group or the acyl group may also be an alkyl group or an acyl group derived from a mixed fatty acid. Examples of the alkyl group derived from a mixed fatty acid include coconut oil alkyl, palm kernel oil alkyl, etc. Examples of the acyl group derived from a mixed fatty acid include coconut oil fatty acid acyl group, palm kernel oil fatty acid acyl group, etc.

[0058] Examples of the counter ion that the anionic surfactant other than the component (A) may have include alkali metal ions, alkaline earth metal ions, ammonium ions, organic ammonium ions, etc.

[0059] The component (B) is preferably at least one selected from sodium lauryl ether sulfate (3) ethylene oxide adduct, sodium N-coconut oil fatty acid acyl-N-methyl taurate, sodium N-coconut oil fatty acid acyl-N-methyl taurate, and sodium N-coconut oil fatty acid acyl glutamate, more preferably at least one selected from sodium lauryl ether sulfate (3) ethylene oxide adduct, sodium N-coconut oil fatty acid acyl-N-methyl taurate, and sodium N-coconut oil fatty acid acyl glutamate, and further preferably sodium lauryl ether sulfate (3) ethylene oxide adduct, sodium N-coconut oil fatty acid acyl-N-methyl taurate, or sodium N-coconut oil fatty acid acyl glutamate.

[0060] Relative to the whole of the cleaning agent composition of the present invention, the content of the component (B) is 1 to 20% by mass, preferably 3 to 15% by mass, more preferably 5 to 10% by mass. When the content of the component (B) is too small, the range covered by the foam during shampooing may be small. When the content of the component (B) is too large, the viscosity of the cleaning agent composition may be unsuitable for use, and its low-temperature stability is poor.

[0061] [Component (C)]

[0062] The component (C) is an amphoteric surfactant. Examples of the amphoteric surfactant include alkyl betaine, alkyl amide betaine, alkyl hydroxy sulfobetaine, alkyl amide hydroxy sulfobetaine, alkyl carboxymethyl hydroxyethyl imidazoline betaine, alkyl amide hydroxyethyl amino acid type amphoteric surfactant, alkyl iminodiacetate, etc.

[0063] Amphoteric surfactants usually have a cationic group containing a nitrogen atom. As the acyl group bonded to the nitrogen atom in the cationic group, for example, acyl groups derived from fatty acids having 8 to 18 carbon atoms can be mentioned. As the fatty acids, for example, saturated fatty acids such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid; unsaturated fatty acids such as palmitoleic acid, oleic acid, elaidic acid, linoleic acid, and linolenic acid; and their mixtures such as coconut oil fatty acid, palm kernel oil fatty acid, tallow fatty acid, hydrogenated tallow fatty acid, etc. The fatty acid forming the above acyl group is preferably lauric acid, myristic acid, palmitic acid, oleic acid, coconut oil fatty acid, or palm kernel oil fatty acid, more preferably lauric acid, coconut oil fatty acid, or palm kernel oil fatty acid.

[0064] Amphoteric surfactants usually have a cationic group containing a nitrogen atom. As the aliphatic hydrocarbon group bonded to the nitrogen atom in the cationic group, for example, aliphatic hydrocarbon groups having 8 to 18 carbon atoms can be mentioned. As the aliphatic hydrocarbon groups, for example, octyl, decyl, lauryl, myristyl, palmyl, stearyl, oleyl, etc. The aliphatic hydrocarbon group may also be a mixed alkyl group derived from mixed fatty acids. As the mixed alkyl group, for example, coconut oil alkyl, palm kernel oil alkyl, tallow alkyl, etc. The aliphatic hydrocarbon group is preferably lauryl, myristyl, palmyl, coconut oil alkyl, or palm kernel oil alkyl, more preferably lauryl, coconut oil alkyl, or palm kernel oil alkyl.

[0065] Component (C) is preferably at least one selected from lauryl betaine, coconut oil fatty acid amide propyl betaine, palm kernel oil fatty acid amide propyl betaine, lauryl hydroxy sulfobetaine, and sodium cocoamphoacetate, more preferably at least one selected from coconut oil fatty acid amide propyl betaine and lauryl hydroxy sulfobetaine, and further preferably coconut oil fatty acid amide propyl betaine or lauryl hydroxy sulfobetaine.

[0066] Relative to the whole of the cleaning agent composition of the present invention, the content of component (C) is 1 to 20% by mass, preferably 3 to 15% by mass, more preferably 5 to 10% by mass. When the content of component (C) is too small, the viscosity of the cleaning agent composition sometimes becomes too low, its low-temperature stability is poor, and sometimes the range where the foam spreads during shampooing is small. When the content of component (C) is too large, the viscosity of the cleaning agent composition sometimes becomes too high.

[0067] [Component (D)]

[0068] (D) is a compound represented by formula (2).

[0069]

[0070] Next, the definitions of the symbols in formula (2) will be described in turn.

[0071] R in formula (2) 3 CO represents an aliphatic acyl group having 8 to 14 carbon atoms. Examples of the aliphatic acyl group having 8 to 14 carbon atoms include octanoyl, decanoyl, lauroyl, myristoyl, etc.

[0072] R 3 CO is preferably octanoyl, decanoyl, lauroyl or myristoyl, more preferably decanoyl, lauroyl or myristoyl, and still more preferably lauroyl or myristoyl.

[0073] BO in formula (2) represents an oxybutylene group, which is a group derived from 1,2-epoxybutane.

[0074] m in formula (2) is a number from 1 to 2. m is the number of oxybutylene groups corresponding to the average addition mole number of 1,2-epoxybutane, and is actually an average value. Therefore, m can be a decimal. m is preferably from 1 to 1.8, more preferably from 1 to 1.4.

[0075] Component (D) is preferably at least one selected from monobutylene glycol octanoate, monobutylene glycol decanoate, monobutylene glycol laurate, monobutylene glycol myristate, dibutylene glycol decanoate, dibutylene glycol laurate, and dibutylene glycol myristate, more preferably at least one selected from monobutylene glycol decanoate, monobutylene glycol laurate, monobutylene glycol myristate, dibutylene glycol decanoate, dibutylene glycol laurate, and dibutylene glycol myristate, and still more preferably monobutylene glycol laurate, or a mixture of monobutylene glycol myristate and dibutylene glycol myristate.

[0076] Relative to the whole cleaning agent composition of the present invention, the content of component (D) is 0.1 to 5% by mass, preferably 0.3 to 3% by mass, and more preferably 0.5 to 2.5% by mass. When the content of component (D) is too small, the viscosity of the cleaning agent composition may become too low, and the range of foam coverage during shampooing is small. When the content of component (D) is too large, component (D) may separate as an oil component, the viscosity of the cleaning agent composition becomes too low, and its low-temperature stability is poor.

[0077] [Component (E)]

[0078] Component (E) is a compound represented by the following formula (3) or a salt thereof.

[0079]

[0080] R in formula (3) 4 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. Examples of the alkyl group having 1 to 4 carbon atoms include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, etc. R 4Preferably a hydrogen atom, a methyl group or an ethyl group, more preferably a methyl group.

[0081] In addition, examples of the salt of the compound of the above formula (3) include, but are not limited to, sodium salt, potassium salt, magnesium salt, calcium salt, monoethanolamine salt, diethanolamine salt, triethanolamine salt, hydrochloride, sulfate, citrate, malate, lactate, etc. Among these salts of the compound, sodium salt, potassium salt, triethanolamine salt, hydrochloride, citrate, malate and lactate are preferred, and sodium salt, citrate, malate and lactate are more preferred.

[0082] Component (E) is preferably at least one selected from β-alanine, N-methyl-β-alanine, N-ethyl-β-alanine and N-tert-butyl-β-alanine, more preferably at least one selected from N-methyl-β-alanine and N-ethyl-β-alanine, and further preferably N-methyl-β-alanine.

[0083] Relative to the whole cleaning agent composition of the present invention, the content of component (E) is 0.001 to 1.0% by mass, preferably 0.002 to 0.6% by mass, and more preferably 0.003 to 0.3% by mass. When the content of component (E) is too small, the low-temperature stability of the cleaning agent composition may be poor, and the range covered by the foam during hair washing may be small. When the content of component (E) is too large, the viscosity of the cleaning agent composition may become too low, and the range covered by the foam during hair washing may be small.

[0084] [Mass ratio of (content of component (A)) / (content of component (B))]

[0085] In the cleaning agent composition of the present invention, the mass ratio of (content of component (A)) / (content of component (B)) (hereinafter sometimes referred to as "(A) / (B) mass ratio") is 0.1 to 0.9, preferably 0.2 to 0.8, and more preferably 0.3 to 0.7. When the (A) / (B) mass ratio is too small, the viscosity of the cleaning agent composition may become unsuitable for use, and the range covered by the foam during hair washing may be small. When the (A) / (B) mass ratio is too large, the viscosity of the cleaning agent composition may become too high, and its low-temperature stability is poor.

[0086] [Mass ratio of (sum of content of component (A) and content of component (B)) / (content of component (C))]

[0087] In the cleaning agent composition of the present invention, the mass ratio of (the sum of the content of component (A) and the content of component (B)) / (the content of component (C)) (hereinafter sometimes referred to as "the mass ratio of {(A)+(B)} / (C)") is 0.2 to 4, preferably 0.3 to 3, more preferably 0.6 to 2. When the mass ratio of {(A)+(B)} / (C) is too small, the viscosity of the cleaning agent composition may become too low, and the range covered by the foam during hair washing is small. When the mass ratio of {(A)+(B)} / (C) is too large, the viscosity of the cleaning agent composition may become too low, its low-temperature stability is poor, and the range covered by the foam during hair washing is small.

[0088] [The mass ratio of (the content of component (A)) / (the content of component (E))]

[0089] In the cleaning agent composition of the present invention, the mass ratio of (the content of component (A)) / (the content of component (E)) (hereinafter sometimes referred to as "the mass ratio of (A) / (E)") is 15 to 300, preferably 25 to 150, more preferably 60 to 150. When the mass ratio of (A) / (E) is too small, the viscosity of the cleaning agent composition may become too low, and the range covered by the foam during hair washing is small. When the mass ratio of (A) / (E) is too large, the low-temperature stability of the cleaning agent composition is sometimes poor, and the range covered by the foam during hair washing is small.

[0090] [Water]

[0091] The cleaning agent composition of the present invention contains water in addition to components (A) to (E). Examples of water include purified water such as distilled water and ion-exchanged water, and tap water. Among them, purified water such as distilled water and ion-exchanged water is preferred.

[0092] Relative to the whole cleaning agent composition of the present invention, the content of water is preferably 56 to 97% by mass, more preferably 60 to 92% by mass, and further preferably 70 to 87% by mass.

[0093] [Other components]

[0094] Within the range that does not impair the effects of the present invention, the cleaning agent composition of the present invention may contain any components other than components (A) to (E) and water (sometimes referred to as "other components" in this specification).

[0095] Examples of other components include the following components.

[0096] Vegetable oils and animal fats;

[0097] Hydrocarbon oils such as squalane, liquid paraffin, and hydrogenated polyisobutene;

[0098] Higher alcohols such as cetyl alcohol, stearyl alcohol, and cetearyl alcohol;

[0099] Silicones such as cyclic silicone, dimethylpolysiloxane, and amino-modified polysiloxane;

[0100] Ester oils such as 2-ethylhexyl palmitate, glyceryl caprylate / caprate, and isopropyl myristate;

[0101] Cationic surfactants such as stearyl trimethyl ammonium chloride, benzalkonium chloride, and ethyl ester PCA of cocoyl arginine;

[0102] Nonionic surfactants other than component (D) such as polyoxyethylene alkyl ether, polyglycerol fatty acid ester, polyoxyethylene glycerol fatty acid ester, fatty acid alkanolamide (such as lauric acid diethanolamide), and fatty acid alkylene glycol ester;

[0103] Water-soluble polymers such as hydroxyethyl cellulose, polyethylene glycol, polyvinyl alcohol, carboxyvinyl polymer, cationized cellulose, cationized guar gum, and homopolymers or copolymers of dialkyldiallylammonium chloride (such as the copolymer of diallyldimethylammonium chloride and acrylamide);

[0104] Solvents such as ethanol, propylene glycol, and glycerol;

[0105] pH regulators such as sodium hydroxide, potassium hydroxide, monoethanolamine, triethanolamine, hydrochloric acid, sulfuric acid, citric acid, succinic acid, malic acid, lactic acid, and tartaric acid;

[0106] Antioxidants such as tocopherol;

[0107] Polysaccharides, amino acids, peptides, preservatives, fragrances, and colorants.

[0108] Regarding the whole cleaning agent composition of the present invention, the content of other components is preferably 20% by mass or less, more preferably 0.3 - 15% by mass, and further preferably 1.3 - 10% by mass. It should be noted that regarding the whole cleaning agent composition of the present invention, the sum of the contents of components (A) - (E) and water is preferably 80% by mass or more, more preferably 85 - 99.7% by mass, and further preferably 90 - 98.7% by mass.

[0109] Among other components, nonionic surfactants are preferred. As the nonionic surfactant, fatty acid alkanolamide (such as lauric acid diethanolamide) is preferred. When using a nonionic surfactant, regarding the whole cleaning agent composition of the present invention, its content is preferably 0.1 - 5% by mass, more preferably 0.5 - 3% by mass.

[0110] Among other components, water-soluble polymers are preferred. As the water-soluble polymer, a homopolymer or copolymer of cationized cellulose and dialkyldiallylammonium chloride (for example, a copolymer of diallyldimethylammonium chloride and acrylamide) is preferred. When using a water-soluble polymer, its content is preferably 0.1 to 1.5% by mass, more preferably 0.3 to 0.7% by mass, based on the total amount of the cleaning agent composition of the present invention.

[0111] Among other components, a pH adjuster is preferred. As the pH adjuster, citric acid, malic acid, and lactic acid are preferred, and citric acid and lactic acid are more preferred. When using a pH adjuster, its content is preferably 0.05 to 5% by mass, more preferably 0.1 to 3% by mass, and further preferably 0.5 to 2% by mass, based on the total amount of the cleaning agent composition of the present invention.

[0112] The pH of the cleaning agent composition of the present invention at 25°C is not particularly limited, preferably 4.5 to 8.0, more preferably 5.0 to 7.5, and further preferably 5.5 to 7.0. It should be noted that the pH of the cleaning agent composition in this specification is the value measured by a pH meter in accordance with JIS Z8802.

[0113] The cleaning agent composition of the present invention can be produced by a known method. For example, by mixing the above components (A) to (E), water, and other components as needed, and heating and stirring as needed, the cleaning agent composition of the present invention is obtained.

[0114] [Examples]

[0115] Hereinafter, the present invention will be specifically described by way of examples and comparative examples, but the present invention is not limited by any of these examples.

[0116] The components (A) to (E) used in the following examples and the like are shown below.

[0117] <Component (A)>

[0118] (A-1) Sodium N-lauroyl-N-methyl-β-alaninate (R in formula (1) 1 CO = lauroyl group, R 2 = methyl group, M n+ = sodium ion, n = 1)

[0119] (A-2) Triethanolamine N-lauroyl-N-methyl-β-alaninate (R in formula (1) 1 CO = lauroyl group, R 2 = methyl group, M n+ = triethanolammonium ion, n = 1)

[0120] (A-3) Sodium N-coconut oil fatty acyl-β-alaninate (R in formula (1)1 CO = coconut oil fatty acid acyl group, R 2 = hydrogen atom, M n+ = sodium ion, n = 1)

[0121] <Component (B)>

[0122] (B-1) Sodium N-coconut oil fatty acid acyl-N-methyl taurate

[0123] (B-2) Sodium N-coconut oil fatty acid acyl glutamate

[0124] (B-3) Sodium polyoxyethylene (3) lauryl ether sulfate

[0125] <Component (C)>

[0126] (C-1) Cocoamidopropyl betaine

[0127] (C-2) Lauryl hydroxysulfobetaine

[0128] <Component (D)>

[0129] (D-1) Monobutylene glycol laurate (R in formula (2) 3 CO = lauroyl group, m = 1.0)

[0130] (D-2) Mixture of monobutylene glycol myristate and dibutylene glycol myristate (R in formula (2) 3 CO = myristoyl group, m = 1.1)

[0131] (D-3) Mixture of monobutylene glycol caprylate and dibutylene glycol caprylate (R in formula (2) 3 CO = caproyl group, m = 1.6)

[0132] <Component (E)>

[0133] (E-1) N-methyl-β-alanine (R in formula (3) 4 = methyl group)

[0134] (E-2) N-ethyl-β-alanine (R in formula (3) 4 = ethyl group)

[0135] [Examples 1 to 16 and Comparative Examples 1 to 11]

[0136] [Preparation of the cleaning agent composition]

[0137] Add each component in the amounts shown in Tables 1-1 to 2-2 to purified water in sequence, mix them, and dissolve them uniformly to prepare the cleaning agent compositions of Examples 1 to 16 and Comparative Examples 1 to 11.

[0138] For the obtained cleaning agent composition, as described in (1) to (3) below, the viscosity, foaming area, and low-temperature stability are evaluated. It should be noted that the pH of the cleaning agent composition in Tables 1-1 to 2-2 is the pH of the cleaning agent composition that is not diluted with water and maintains the amounts of the components shown in Tables 1-1 to 2-2 at 25°C. The results are shown in Tables 1-1 to 2-2.

[0139] <Evaluation of Cleaning Agent Composition>

[0140] (1) Viscosity

[0141] The viscosity of the obtained cleaning agent composition is measured at 25°C using a B-type viscometer ("TV-20" manufactured by Toki Sangyo Co., Ltd.) with rotors No. 2 to 4 at a speed of 12 rpm or 30 rpm. Based on the measured viscosity (mPa·s, 25°C), the viscosity of the cleaning agent composition is evaluated according to the following criteria. Evaluation as "◎" and "○" is considered qualified.

[0142] <Evaluation Criteria>

[0143] ◎: The viscosity is 2000 mPa·s or more and less than 10000 mPa·s

[0144] ○: The viscosity is 1000 mPa·s or more and less than 2000 mPa·s, or 10000 mPa·s or more and less than 20000 mPa·s

[0145] △: The viscosity is less than 1000 mPa·s

[0146] ×: The viscosity is 20000 mPa·s or more

[0147] (2) Foaming Area

[0148] Wash the hair with 2 g of an aqueous solution of 25% by mass of sodium laureth sulfate (human black hair (root-aligned), manufactured by Beaulax Co., Ltd., product number: BS-B3A, 10 g, 30 cm), and rinse thoroughly with tap water at 40°C to prepare the decontaminated hair. Take 0.1 g of the obtained cleaning agent composition with one hand, and rinse the decontaminated hair again thoroughly with tap water at 40°C. While the hair is wet, place the part 10 cm from the root on the hand holding the cleaning agent composition. Note that the remaining 20 cm part of the hair protrudes from the hand. Then, use the other hand to lather the hair for 10 seconds, and slide the hair on the hand holding the cleaning agent composition, and similarly wash the part of the hair 10 - 20 cm from the root of the hair for 10 seconds. Finally, slide the hair in such a way that the part 20 - 30 cm from the root is placed on the hand holding the cleaning agent composition, and wash the hair again for 10 seconds. Based on the amount of lather up to the tip of the hair, evaluate the lathering area of the cleaning agent composition according to the following criteria. When evaluated as "◎" and "○", it is considered qualified.

[0149] <Evaluation Criteria>

[0150] ◎: All three parts show an equal amount of lather

[0151] ○: The same amount of lather is shown at 0 - 10 cm and 10 - 20 cm from the root, and lathering is also confirmed even at 20 - 30 cm

[0152] △: Almost no lathering occurs at 20 - 30 cm from the root

[0153] ×: Almost no lathering occurs at 10 - 20 cm and 20 - 30 cm from the root

[0154] (3) Low-temperature stability

[0155] Seal the obtained cleaning agent composition in a transparent glass container, and store it at 0°C or 5°C for 1 month respectively, and observe its appearance. Based on the observed appearance, evaluate the low-temperature stability of the cleaning agent composition according to the following criteria. When evaluated as "○", it is considered qualified.

[0156] <Evaluation Criteria>

[0157] ○: No change in appearance at 0°C and 5°C

[0158] △: No change in appearance at 5°C, but the cleaning agent composition becomes turbid at 0°C

[0159] ×: The cleaning agent composition becomes turbid at both 0°C and 5°C

[0160] [Table 1-1]

[0161]

[0162] % = mass %

[0163] [Table 1-2]

[0164]

[0165] % = mass %

[0166] [Table 2-1]

[0167]

[0168] % = mass %

[0169] [Table 2-2]

[0170]

[0171] % = mass %

[0172] The viscosities, foaming areas and low-temperature stabilities of the cleaning agent compositions of Examples 1 to 16 are all good. On the other hand, since the cleaning agent composition of Comparative Example 1 does not contain component (A), its viscosity is low and its foaming area is also small.

[0173] Since the cleaning agent composition of Comparative Example 2 does not contain component (B), its foaming area is small and its low-temperature stability is also insufficient.

[0174] Since the cleaning agent composition of Comparative Example 3 does not contain component (C), its viscosity is low, its foaming area is also small, and its low-temperature stability is also insufficient.

[0175] Since the cleaning agent composition of Comparative Example 4 does not contain component (D), its viscosity is low and its foaming area is also small.

[0176] Since the cleaning agent composition of Comparative Example 5 contains more than 5 mass % of component (D), its viscosity is low and its low-temperature stability is also poor.

[0177] Since the cleaning agent composition of Comparative Example 6 does not contain component (E), its foaming area is small and its low-temperature stability is also insufficient.

[0178] Since the cleaning agent composition of Comparative Example 7 contains more than 1.0 mass % of component (E) and the mass ratio of (A) / (E) is less than 15, its viscosity is low and its foaming area is also small.

[0179] Since the mass ratio of (A) / (B) in the cleaning agent composition of Comparative Example 8 is less than 0.1, its viscosity is low and its foaming area is also small.

[0180] Since the mass ratio of (A) / (B) in the cleaning agent composition of Comparative Example 9 is greater than 0.9, its viscosity is high and its low-temperature stability is also insufficient.

[0181] Since the mass ratio of {(A)+(B)} / (C) of the cleaning agent composition of Comparative Example 10 is less than 0.2, it has a low viscosity and a small foaming area.

[0182] Since the mass ratio of {(A)+(B)} / (C) of the hair cleaning agent composition of Comparative Example 11 is greater than 4, it has a low viscosity, a small foaming area, and insufficient low-temperature stability.

[0183] <Formulation Examples 1 and 2>

[0184] In addition, Formulation Examples 1 and 2 of the cleaning agent composition of the present invention are shown below.

[0185] [Table 3]

[0186] Formulation Example 1

[0187] Dosage Component (A-1) (%) 3.5 Component (B-1) (%) 5.5 Component (C-1) (%) 6.0 Component (D-1) (%) 2.0 Glycerol (%) 2.0 Lauric acid diethanolamide (%) 1.0 Cationized cellulose (%) 0.5 Ethylhexylglycerin (%) 0.1 Component (E-1) (%) 0.05 Citric acid (%) 0.7 Purified water The balance Total (%) 100

[0188] % = mass %

[0189] It should be noted that the mass ratio of (A) / (B) of the cleaning agent composition of Formulation Example 1 is 0.6, the mass ratio of {(A)+(B)} / (C) is 1.5, and the mass ratio of (A) / (E) is 70.

[0190] [Table 4]

[0191] Formulation Example 2

[0192] Dosage Component (A-1) (%) 2.5 Component (B-1) (%) 6.5 Component (C-2) (%) 6.0 Glycerol (%) 2.0 Component (D-1) (%) 1.5 1,3-Butanediol (%) 1.0 Cationized cellulose (%) 0.5 Sodium benzoate (%) 0.2 Component (E-1) (%) 0.04 Citric acid (%) 0.8 Purified water The remainder Total (%) 100

[0193] % = mass %

[0194] It should be noted that the mass ratio of (A) / (B) of the cleaning agent composition of Formulation Example 2 is 0.4, the mass ratio of {(A)+(B)} / (C) is 1.5, and the mass ratio of (A) / (E) is 63.

[0195] The cleaning agent compositions of Formulation Examples 1 and 2 were also evaluated for the above (1) to (3). As a result, it was found that they had an appropriate viscosity, a large range of foam coverage during hair washing, and good low-temperature stability. Therefore, the effects of the present invention were confirmed.

[0196] [Industrial Applicability]

[0197] The cleaning agent composition of the present invention has a viscosity suitable for use as a cleaning agent, and at the same time has low-temperature stability that can maintain a transparent appearance even at low temperatures in winter. The foam covers a large range during hair washing, so it is convenient to use and can provide a comfortable cleaning feeling with a small amount.

Claims

1. A hair cleansing composition, comprising the following components (A) to (E) and water: (A): A surfactant represented by formula (1), In the formula, R 1 CO represents an aliphatic acyl group having 8 to 22 carbon atoms, R 2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, M n+ represents an alkali metal ion, an alkaline earth metal ion, an ammonium ion or an organic ammonium ion, n represents 1 or 2, (B): An anionic surfactant other than component (A), (C): An amphoteric surfactant, (D): A compound represented by formula (2), In the formula, R 3 CO represents an aliphatic acyl group having 8 to 14 carbon atoms, BO represents oxybutylene, m represents a number from 1 to 2, (E): A compound represented by formula (3) or a salt thereof, In the formula, R 4 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, Based on the whole hair cleansing composition, the content of component (A) is 0.1 to 10% by mass, the content of component (B) is 1 to 20% by mass, the content of component (C) is 1 to 20% by mass, the content of component (D) is 0.1 to 5% by mass, and the content of component (E) is 0.001 to 1.0% by mass, The mass ratio of (the content of component (A)) / (the content of component (B)) is 0.1 to 0.9, (The sum of the content of component (A) and the content of component (B)) / (the content of component (C)) The mass ratio is 0.2 to 4, and (The content of component (A)) / (the content of component (E)) The mass ratio is 15 to 300.

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