Hair cleansing composition

Abstract

To provide a hair detergent composition in which an amino acid-based surfactant is formulated, and which is excellent in storage stability and smoothness during shampooing while further containing an oily component.SOLUTION: The hair detergent composition comprises (A) an amino acid-based anionic surfactant, (B) a specific cationic polymer, (C) a hydrophobic amphiphile which is one or more kinds selected from the group consisting of a monofatty acid glyceryl (C1), a fatty acid (C2) and a higher alcohol (C3), and (D) an oily ingredient which is liquid at 25 °C, wherein the content of the ingredient (A) is 2.0 mass% or more.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a hair wash composition. [Background technology]

[0002] Consumers highly desire hair cleansers that not only remove dirt from the scalp and hair, but also provide smoothness during washing and mildness to the scalp and hair. Therefore, in recent years, hair cleansers have increasingly used amino acid-based surfactants, which are said to be gentler on the scalp and hair than the petroleum-based surfactants that have been the mainstream until now, and many products containing oily ingredients as conditioning agents have also been released on the market. Patent Document 1 describes a lamellar composition that has the effect of minimizing deposition of moisturizing agents in the composition, and that contains a mixture of a specific anionic surfactant, a specific amphoteric surfactant, and / or a specific zwitterionic surfactant, a fatty acid, a moisturizing / conditioning agent, a cationic deposition polymer, a modified anionic crosslinked polymer, and a lamellar structuring agent. In the examples, the document discloses a lamellar-structured body and hair cleansing composition that contains an amino acid-based surfactant, polyquaternium-10, lauric acid, stearic acid, soybean oil, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2021-533137 Summary of the Invention [Problem to be solved by the invention]

[0004] Hair wash compositions generally contain surfactants with good detergency, which can remove essential components and oils from hair during washing, causing dryness and brittleness of hair. To address this issue, a technique is known in which a liquid oily component is blended as a hydrophobic care component to suppress dryness and brittleness of hair. However, when a liquid oily component is blended, the components of the hair wash composition may separate, resulting in a deterioration in storage stability, and the smoothness of the hair when washed may be impaired.

[0005] Therefore, an object of the present invention is to provide a hair wash composition that contains an amino acid-derived surfactant and further contains an oily component, and yet has excellent storage stability and smoothness during hair washing. [Means for solving the problem]

[0006] The present inventors have discovered that the above-mentioned problems can be solved by combining an amino acid-based anionic surfactant, a cationic polymer consisting of specified components, a hydrophobic amphiphilic substance consisting of specified components, and an oily component that is liquid at 25°C. That is, the present invention provides the following components (A) to (D): (A) an amino acid-based anionic surfactant, (B) a cationic polymer which is at least one selected from the group consisting of the following components (B1) and (B2): (C) a hydrophobic amphiphilic substance which is at least one selected from the group consisting of monoglyceryl fatty acid (C1), fatty acid (C2), and higher alcohol (C3), and (D) an oily component that is liquid at 25°C; Contains The hair wash composition has a content of the component (A) of 2.0% by mass or more. (B1) A cationic group-containing copolymer which is a copolymer of a monomer mixture containing the following monomers (b1-1), (b1-2), and (b1-3): Monomer (b1-1) At least one vinyl monomer selected from the group consisting of vinyl monomers represented by the following general formula (1): [ka] (In the formula, R 1 represents a hydrogen atom or a methyl group, and R 2 represents a hydrogen atom, a linear or branched alkyl group or an alkenyl group having 1 to 4 carbon atoms, and R 3 represents a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms. Monomer (b1-2) At least one vinyl monomer selected from the group consisting of vinyl monomers represented by the following general formula (2): [ka] (In the formula, R 1 represents the same group as above, and R 4 and R 5 each independently represents an alkyl or alkenyl group having 1 to 4 carbon atoms, and R 6 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and Y 1 represents an -O-, -NH-, -CH2- or -O-CH2CH(OH)- group, and Y 1 When is -CH2-, Z 1 represents a single bond or a linear or branched divalent saturated hydrocarbon group having 1 to 3 carbon atoms; Y 1 When is other than -CH2-, Z 1 represents a linear or branched divalent saturated hydrocarbon group having 1 to 4 carbon atoms. Q represents a conjugate base of an acid. Monomer (b1-3) Crosslinkable monomer having two or more reactive unsaturated groups (B2) A hydrophobic cationized hydroxyethyl cellulose having a main chain derived from anhydroglucose represented by the following general formula (3), in which the average number of moles of cationized ethyleneoxy groups per anhydroglucose unit is 0.01 or more and 3.0 or less, and the average number of moles of ethyleneoxy groups is 0.5 or more and 4.0 or less: [ka] (In general formula (3), R 7 , R8 and R 9 are each independently represented by the following general formula (4): [ka] and a substituent having an ethyleneoxy group, and n is the average degree of polymerization of anhydroglucose and is a number from 50 to 5,000. In general formula (4), Y 2 and Y 3 is a hydrogen atom on one side and a group represented by the following general formula (5) [ka] p represents the number of ethyleneoxy groups contained in the general formula (4), and q represents the number of cationized ethyleneoxy groups (-CH(Y 2 )-CH(Y 3 )-O-), each of which is 0 or a positive integer. When neither p nor q is 0, the order of addition of the cationized ethyleneoxy group and the ethyleneoxy group does not matter, and when p and / or q is 2 or greater, either block bonding or random bonding may be used. When a plurality of substituents represented by general formula (4) are present in a molecule, the values ​​of p and q may be different among the substituents, but at least one of them has a q of 1 or greater. In general formula (5), R 10 ~R 12 each independently represents a linear or branched alkyl group having 1 to 18 carbon atoms; X - indicates an anionic group. However, R 12 At least one of the groups is a linear or branched alkyl group having 8 to 18 carbon atoms.) [Effects of the Invention]

[0007] The hair wash composition of the present invention can provide a hair wash composition that has excellent storage stability and also provides excellent smoothness during hair washing. DETAILED DESCRIPTION OF THE INVENTION

[0008] [Hair cleansing composition] The hair wash composition of the present invention comprises the following components (A) to (D): (A) an amino acid-based anionic surfactant, (B) a cationic polymer which is at least one selected from the group consisting of the components (B1) and (B2); (C) a hydrophobic amphiphilic substance which is at least one selected from the group consisting of monoglyceryl fatty acid (C1), fatty acid (C2), and higher alcohol (C3), and (D) an oily component that is liquid at 25°C; Contains The hair wash composition contains the component (A) in an amount of 2.0% by mass or more. The hair wash composition of the present invention, having the above-mentioned constitution, is a hair wash composition that has excellent storage stability and also provides excellent smoothness during hair washing.

[0009] <Definition> In the present invention, "hair" primarily refers to human head hair, but also includes hair that has been cut off from the human head. In the present invention, "comprises component X" or "contains component X" also means "composed of component X." In the present invention, the storage stability at −5° C., room temperature (RT: 25° C.), and 50° C. is used as an index of “storage stability.” If a composition satisfies at least one of these conditions, it can be suitably used as a hair wash composition.

[0010] The reason why the hair wash composition of the present invention having the above-described structure exhibits the effects of the present invention is not clear, but is presumed to be as follows. The hair wash composition of the present invention contains an amino acid-derived anionic surfactant as component (A), a specific cationic polymer as component (B), a hydrophobic amphiphilic substance as component (C) which is at least one selected from the group consisting of monoglyceryl fatty acid (C1), fatty acid (C2), and higher alcohol (C3), and an oily component that is liquid at 25°C as component (D).

[0003] Generally, in a hair wash composition containing an amino acid-based anionic surfactant as the surfactant, it is difficult to incorporate a large amount of a liquid oily component from the viewpoint of product storage stability. However, it has been found that a stable dispersion system can be formed in the composition by combining a specific cationic polymer and a specific hydrophobic amphiphilic substance, and it is presumed that this makes it possible to stably incorporate a liquid oily component. It has also been found that the specific hydrophobic amphiphilic substance contributes to the stabilization of the foam film, and is presumed to contribute to the development of smoothness during hair washing.

[0011] <Amino acid-based anionic surfactant (A)> The hair wash composition of the present invention contains an amino acid-based anionic surfactant (A) from the viewpoints of cleansing ability, low irritation, and consumer acceptability. The amino acid-based anionic surfactant is an anionic surfactant having an amino acid skeleton, and any known amino acid-based anionic surfactant can be used without any particular limitation. Examples of amino acid-based anionic surfactants include N-acylamino acids obtained by N-acylation of amino acids, higher alcohol esters of amino acids, N-alkylamino acids, salts thereof, and derivatives thereof. Examples of derivatives include esterified products, amidated products, N-methylated products, and N,N-dimethylated products. Here, examples of the amino acid skeleton of component (A) include glutamic acid, alanine, glycine, taurine, sarcosine, and aspartic acid. From the viewpoint of improving cleaning properties, the carbon number of the N-acyl group or N-alkyl group is preferably 4 or more, more preferably 8 or more, and is preferably 22 or less, more preferably 18 or less.

[0012] Examples of N-acylamino acids and salts thereof include surfactants such as glutamic acid-based, alanine-based, glycine-based, taurine-based, sarcosine-based, and aspartic acid-based surfactants. Examples of glutamic acid surfactants include capryloyl glutamic acid, 2-ethylhexanoyl glutamic acid, lauroyl glutamic acid, myristoyl glutamic acid, palmitoyl glutamic acid, stearoyl glutamic acid, cocoyl glutamic acid, palm oil fatty acid acyl glutamic acid, and beef tallow fatty acid acyl glutamic acid. Examples of the alanine surfactant include cocoyl alanine, lauroyl methyl alanine, myristoyl methyl alanine, and cocoyl methyl alanine. Examples of glycine surfactants include cocoyl glycine, lauroyl glycine, and myristoyl glycine. Examples of taurine surfactants include lauroyl methyl taurine, myristoyl methyl taurine, and cocoyl methyl taurine. Examples of sarcosine surfactants include lauroyl sarcosine, myristoyl sarcosine, and cocoyl sarcosine. Examples of aspartic acid surfactants include lauroyl aspartic acid, myristoyl aspartic acid, palmitoyl aspartic acid, stearoyl aspartic acid, and cocoyl aspartic acid.

[0013] In addition, examples of the counter ion include alkali metal ions, alkaline earth metal ions, ammonium ions, alkanolammonium, etc. Here, examples of the alkali metal ions include sodium ions and potassium ions, examples of the alkaline earth metal ions include calcium ions and magnesium ions, and examples of the alkanolammonium include alkanolammoniums having 1 to 3 alkanol groups each having 2 or 3 carbon atoms (for example, monoethanolammonium, diethanolammonium, triethanolammonium, triisopropanolammonium).

[0014] Among these, from the viewpoints of improving cleansing ability, low irritation, storage stability, and smoothness during hair washing, preferably one or more surfactants selected from alanine-based surfactants, taurine-based surfactants, and sarcosine-based surfactants, more preferably one or more surfactants selected from cocoyl alanine, lauroyl methyl alanine, myristoyl methyl alanine, cocoyl methyl alanine, lauroyl methyl taurine, myristoyl methyl taurine, cocoyl methyl taurine, lauroyl sarcosine, myristoyl sarcosine, cocoyl sarcosine, and salts thereof, even more preferably one or more surfactants selected from lauroyl methyl alanine, cocoyl methyl taurine, lauroyl sarcosine, and salts thereof, still more preferably one or more surfactants selected from sodium lauroyl methyl alanine, sodium cocoyl methyl taurine, and triethanolamine lauroyl sarcosine, and from the viewpoint of stability, even more preferably one or more surfactants selected from sodium lauroyl methyl alanine and triethanolamine lauroyl sarcosine.

[0015] Furthermore, from the viewpoint of achieving both storage stability and smoothness during washing, preferably two or more amino acid-based anionic surfactants are used, more preferably two or more selected from the group consisting of alanine-based surfactants, taurine-based surfactants, and sarcosine-based surfactants, even more preferably two or more selected from the group consisting of lauroyl methylalanine, cocoyl methyl taurine, lauroyl sarcosine, and salts thereof, and even more preferably two or more selected from the group consisting of sodium cocoyl methyl taurine, sodium lauroyl methylalanine, and triethanolamine lauroyl sarcosine.

[0016] The content of this component (A) in the hair wash composition is 2.0% by mass or more from the viewpoints of improving lathering properties, cleansing properties, and smoothness during hair washing. From the same viewpoints, it is preferably 4.0% by mass or more, more preferably 5.0% by mass or more, even more preferably 8.0% by mass or more, and even more preferably 10% by mass or more. From the viewpoints of improving storage stability and smoothness during hair washing, it is preferably 20% by mass or less, more preferably 18% by mass or less, even more preferably 16% by mass or less, and even more preferably 14% by mass or less. From the viewpoints of improving storage stability and smoothness during hair washing, it is preferably 2.0% by mass or more and 20% by mass or less, more preferably 4.0% by mass or more and 20% by mass or less, even more preferably 5.0% by mass or more and 18% by mass or less, even more preferably 8.0% by mass or more and 16% by mass or less, and even more preferably 10% by mass or more and 14% by mass or less.

[0017] <Other anionic surfactants (A')> The hair wash composition of the present invention may contain, in addition to the component (A), other anionic surfactants to enhance cleansing and foaming properties. Examples of other anionic surfactants include known anionic surfactants other than the component (A) (excluding those contained in component (C2)). Examples of this component (A') include sulfates, sulfonates, carboxylates, and phosphates. Examples of sulfates include alkyl or alkenyl ether sulfates, alkyl or alkenyl sulfates, and the like. Examples of sulfonates include alkylsulfonates, α-olefin sulfonates, internal olefin sulfonates, alkylbenzene sulfonates, α-sulfosuccinates, and α-sulfofatty acid salts. Examples of the carboxylate include alkyl or alkenyl ether carboxylates, etc. Examples of the phosphate include mono- or di-phosphate salts, etc. As the anionic surfactant, one or more of these can be used. Among them, it is preferable to use alkyl or alkenyl ether carboxylates from the viewpoint of improving cleansing properties and foaming properties while maintaining low irritation. When component (A') is contained, its content in the hair wash composition is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, from the viewpoint of enhancing cleansing ability and lathering ability, and is preferably 3.0% by mass or less, more preferably 2.0% by mass or less, from the viewpoint of smoothness during hair washing. Also from these viewpoints, the content is preferably from 0.5% by mass to 3.0% by mass, more preferably from 1.0% by mass to 2.0% by mass.

[0018] Furthermore, as described below, the hair wash composition of the present invention may contain, as component (E), a surfactant other than components (A), (A'), and (C). When components (A') and (E) are used as surfactants other than component (A), the content of component (A) in those surfactants [(A) / [(A) + (A') + (E)]] is preferably 10% by mass or more, more preferably 30% by mass or more, even more preferably 50% by mass or more, and still more preferably 58% by mass or more from the viewpoint of improving smoothness during hair washing, and is preferably 100% by mass or less, more preferably 98% by mass or less, and even more preferably 93% by mass or less from the viewpoint of improving storage stability and smoothness during hair washing. Furthermore, from the viewpoint of improving storage stability and smoothness during hair washing, the content is preferably 10% by mass or more and 100% by mass or less, more preferably 30% by mass or more and 98% by mass or less, even more preferably 50% by mass or more and 98% by mass or less, and still more preferably 58% by mass or more and 93% by mass or less.

[0019] <Cationic polymer (B)> The hair wash composition of the present invention contains a specific cationic polymer (B) from the viewpoints of improving storage stability and smoothness during hair washing. Component (B) also contributes to foaming properties. The specific cationic polymer in component (B) is one or more selected from the group consisting of components (B1) and (B2) below. Component (B) does not include cationic polymers other than components (B1) and (B2). In this specification, the term "cationic polymer" refers to a water-soluble polymer having cationic groups and an overall cationic charge, and the cationic group refers to a cationic group or a group that can be ionized to become a cationic group. Specific examples of this cationic group include a primary amino group, a secondary amino group, a tertiary amino group, and a quaternary ammonium group.

[0020] <<Component (B1)>> The cationic polymer of component (B1) is a cationic group-containing copolymer which is a copolymer of a monomer mixture containing the following monomers (b1-1), (b1-2) and (b1-3).

[0021] [Monomer (b1-1)] The monomer (b1-1) is at least one selected from vinyl monomers represented by the following general formula (1).

[0022] [ka] (In the formula, R 1 represents a hydrogen atom or a methyl group, and R 2 represents a hydrogen atom, a linear or branched alkyl group or an alkenyl group having 1 to 4 carbon atoms, and R 3 represents a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms. In the general formula (1), R 1 is preferably a hydrogen atom, and R 2 is preferably a linear or branched alkyl group having 1 to 4 carbon atoms, more preferably a linear alkyl group having 1 to 2 carbon atoms, R 3is preferably a linear or branched alkyl group having from 1 to 4 carbon atoms, more preferably a linear alkyl group having from 1 to 2 carbon atoms. From the viewpoint of smoothness during hair washing, the monomer (b1-1) is preferably N,N-dimethylacrylamide or the like.

[0023] [Monomer (b1-2)] The monomer (b1-2) is at least one selected from vinyl monomers represented by the following general formula (2).

[0024] [ka] (In the formula, R 1 represents the same group as above, and R 4 and R 5 each independently represents an alkyl or alkenyl group having 1 to 4 carbon atoms, and R 6 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and Y 1 represents an -O-, -NH-, -CH2- or -O-CH2CH(OH)- group, and Y 1 When is -CH2-, Z 1 represents a single bond or a linear or branched divalent saturated hydrocarbon group having 1 to 3 carbon atoms; Y 1 When is other than -CH2-, Z 1 represents a linear or branched divalent saturated hydrocarbon group having 1 to 4 carbon atoms. Q represents a conjugate base of an acid.

[0025] [Monomer (b1-3)] Monomer (b1-3) is a crosslinkable monomer having two or more reactive unsaturated groups. The reactive unsaturated groups are unsaturated groups reactive with monomers (b1-1) and (b1-2), such as ethylenically unsaturated groups. Preferred examples of monomer (b1-3) include (meth)acrylic acid ester compounds of polyhydric alcohols such as ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, and polyethylene glycol di(meth)acrylate, and more preferably polyethylene glycol di(meth)acrylate.

[0026] The cationic polymer of component (B1) is preferably N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer (INCI name: Polyquaternium-52). Commercially available products of Polyquaternium-52 include, for example, SOFCARE KG-301W and SOFCARE KG-101W-E (both manufactured by Kao Corporation).

[0027] <<Component (B2)>> The cationic polymer of component (B2) is a hydrophobic cationized hydroxyethyl cellulose having an anhydroglucose-derived main chain represented by the following general formula (3), in which the average number of moles of cationized ethyleneoxy groups per anhydroglucose unit is 0.01 or more and 3.0 or less, and the average number of moles of ethyleneoxy groups is 0.5 or more and 4.0 or less. [ka] (In the formula, R 7 , R 8 and R 9 each independently represent a cationized ethyleneoxy group represented by the following general formula (4) and a substituent having an ethyleneoxy group, and n is the average degree of polymerization of anhydroglucose and represents a number of 50 or more and 5000 or less.

[0028] R in general formula (3) 7 , R 8 and R9 are substituents represented by general formula (4), and may be the same or different. 7 , n R 8 , n R 9 may be the same or different.

[0029] [ka] (In the formula, Y 2 and Y 3 One of the groups is a hydrogen atom, and the other is a cationic group represented by the following general formula (5): p is the number of ethyleneoxy groups contained in the general formula (4), q is the number of cationized ethyleneoxy groups (-CH(Y 2 )-CH(Y 3 )-O-), each of which is 0 or a positive integer. When neither p nor q is 0, the order of addition of the cationized ethyleneoxy group and the ethyleneoxy group does not matter, and when p and / or q is 2 or greater, either block bonding or random bonding may be used. When a plurality of substituents represented by general formula (4) are present in a molecule, the values ​​of p and q may be different among the substituents, but at least one of them has a q of 1 or greater.

[0030] [ka] (In the formula, R 10 ~R 12 each independently represents a linear or branched alkyl group having 1 to 18 carbon atoms; X - indicates an anionic group. However, R 12 At least one of the groups is a linear or branched alkyl group having 8 to 18 carbon atoms.)

[0031] In general formula (5), R 10 ~R 12Examples of R include a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-octyl group, an n-decyl group, an n-dodecyl group, an n-tetradecyl group, an n-hexadecyl group, and an n-octadecyl group. 10 and R 11 R is preferably a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-octyl group, an n-decyl group, or an n-dodecyl group, and more preferably a methyl group. 12 is preferably a methyl group, an n-octyl group, an n-decyl group, or an n-dodecyl group, and more preferably a methyl group or an n-dodecyl group.

[0032] In general formula (5), X - is an anionic group that serves as a counterion of ammonium, and specific examples thereof include alkyl sulfate ions, sulfate ions, phosphate ions, alkyl carbonate ions, and halide ions. Of these, halide ions are preferred from the viewpoint of ease of production. Examples of halide ions include fluoride ions, chloride ions, bromide ions, and iodide ions, but from the viewpoint of water solubility and chemical stability of component (B2), chloride ions and bromide ions are preferred, and chloride ions are more preferred.

[0033] The cationic polymer of component (B2) is preferably a quaternary ammonium salt polymer (INCI name: Polyquaternium-67) obtained by addition reaction of hydroxyethyl cellulose with trimethylammonium-substituted epoxide and lauryl-substituted epoxide. Commercially available products of Polyquaternium-67 include SoftCat Polymer SL-30 (manufactured by The Dow Chemical Company).

[0034] The content of this component (B) in the hair wash composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.3% by mass or more from the viewpoints of storage stability, smoothness during hair washing, and lathering ability, and is preferably 3.0% by mass or less, more preferably 2.5% by mass or less, and even more preferably 2.0% by mass or less from the viewpoints of smoothness during hair washing, ease of spread on hair, and ease of blending. Also, from the same viewpoints, the content is preferably 0.1% by mass or more and 3.0% by mass or less, more preferably 0.2% by mass or more and 2.5% by mass or less, and even more preferably 0.3% by mass or more and 2.0% by mass or less.

[0035] The components (B1) and (B2) may each be used alone or in combination of two or more. When the components (B1) and (B2) are used in combination, the mass ratio of the components (B1) and (B2) in the component (B) [(B1) / (B2)] is, from the viewpoints of improving storage stability and smoothness during shampooing, preferably greater than 0 / less than 1 to less than 1 / greater than 0, more preferably 0.01 / 0.99 or greater and 0.7 / 0.3 or less, even more preferably 0.01 / 0.99 or greater and 0.6 / 0.4 or less, still more preferably 0.02 / 0.98 or greater and 0.5 / 0.5 or less, still more preferably 0.03 / 0.97 or greater and 0.4 / 0.6 or less, and even more preferably 0.04 / 0.96 or greater and 0.3 / 0.7 or less.

[0036] <Cationic polymer (B') other than component (B)> The hair wash composition of the present invention may contain, in addition to the component (B), another cationic polymer (B') from the viewpoint of achieving appropriate viscosity properties and improving smoothness during hair washing. Examples of the other cationic polymer include known cationic polymers other than the component (B). This cationic polymer is an optional component. Examples of this component (B') include cationized polygalactomannans such as cationized guar gum, cationized tara gum, and cationized locust bean gum; cationized cellulose; cationized hydroxyethyl cellulose (excluding the component (B2)) and cationized hydroxyalkyl cellulose such as cationized hydroxypropyl cellulose; cationic starch; cationized polyvinyl alcohol; diallyl quaternized ammonium salt polymers such as polydiallyldimethylammonium chloride, diallyldimethylammonium chloride / acrylic acid copolymer, diallyldimethylammonium chloride / acrylamide copolymer, and diallyldimethylammonium chloride / acrylic acid / acrylamide copolymer; vinylimidazolium chloride vinylpyrrolidone / alkylaminoalkyl (meth)acrylate copolymer; vinylpyrrolidone / alkylaminoalkyl (meth)acrylate / vinylcaprolactam copolymer; vinylpyrrolidone / (meth)acrylamidopropyl trimethylammonium chloride copolymer; alkylacrylamide / (meth)acrylate / alkylaminoalkylacrylamide / polyethylene glycol (meth)acrylate copolymer; adipic acid / dimethylaminohydroxypropyl ethylenetriamine copolymer; and the cationic polymers described in JP-A-53-139734 and JP-A-60-36407, and one or more of these may be used.

[0037] Among these, from the viewpoint of enhancing smoothness during shampooing, one or more selected from the group consisting of cationized polygalactomannan, cationized hydroxyalkyl cellulose, and diallyl quaternary ammonium salt polymer are preferred, one or more selected from the group consisting of cationized guar gum and cationized hydroxyalkyl cellulose are more preferred, and cationized guar gum is even more preferred.

[0038] Commercially available cationized guar gum products include JAGUAR Excel, JAGUAR C-17, and NATERNAL C14 S (all manufactured by Solvay (Novecare)). Among cationized hydroxyalkyl celluloses, commercially available cationized hydroxyethyl cellulose products include Polyquaternium-10 (o-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride: UCARE POLYMER JR-30M, UCARE POLYMER JR-400 (both manufactured by The Dow Chemical Company), Poise C-60H, Poise C-150L (both manufactured by Kao Corporation)). Commercially available cationized hydroxypropyl cellulose products include SOFCARE C-HP2W (manufactured by Kao Corporation). Among diallyl quaternized ammonium salt polymers, examples of commercially available diallyldimethylammonium chloride / acrylamide copolymers include Polyquaternium-7: MERQUAT550 (manufactured by Lubrizol). Commercially available products of diallyldimethylammonium chloride / acrylic acid / acrylamide copolymer include Polyquaternium-39: MERQUAT3331PR (manufactured by Lubrizol). This component (B') can be used alone or in combination of two or more.

[0039] When component (B') is used, its content in the hair wash composition is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.15% by mass or more, and preferably 1.0% by mass or less, more preferably 0.5% by mass or less, even more preferably 0.3% by mass or less, from the viewpoints of achieving appropriate viscosity properties, improving smoothness during hair washing, and imparting conditioning properties. Also, from the same viewpoints, the content of component (B') is preferably 0.05% by mass or more and 1.0% by mass or less, more preferably 0.1% by mass or more and 0.5% by mass or less, even more preferably 0.15% by mass or more and 0.3% by mass or less.

[0040] <Hydrophobic amphiphilic substance (C)> In the hair wash composition of the present invention, the hydrophobic amphiphilic substance (C) used in the present invention is a component containing one or more selected from the group consisting of fatty acid monoglyceryl (C1), fatty acid (C2), and higher alcohol (C3), as described above. Note that this component (C) does not include any components other than the components (C1) to (C3).

[0041] [Monoglyceryl fatty acids (C1)] The hair wash composition of the present invention may contain a mono-fatty acid glyceryl as component (C1) from the viewpoints of improving storage stability and smoothness during hair washing. The mono-fatty acid glyceryl is a mono-fatty acid ester of glycerin. Component (C1) is considered to be a component that particularly contributes to improving the smoothness of the hair wash composition during hair washing, but also contributes to smoothness during rinsing, foaming ability, and foam retention. The hydrocarbon chain of component (C1) may be a linear hydrocarbon chain or a branched hydrocarbon chain, and is preferably a linear hydrocarbon chain from the viewpoints of improving storage stability and smoothness during hair washing. Furthermore, this hydrocarbon chain may be a saturated hydrocarbon chain or an unsaturated hydrocarbon chain, and is preferably a saturated hydrocarbon chain from the viewpoints of improving storage stability and smoothness during hair washing. These may be used alone or in combination of two or more.

[0042] The number of carbon atoms in the acyl group of this component (C1) is preferably 8 or more from the viewpoints of storage stability, smoothness during shampooing and rinsing, lathering ability, and foam retention, as well as from the viewpoints of irritation and odor, and from the viewpoints of improving lathering ability and smoothness during rinsing, and from the viewpoint of appropriate formulation viscosity, it is preferably 22 or less, more preferably 18 or less, even more preferably 16 or less, still more preferably 14 or less, still more preferably 12 or less, and still more preferably 10 or less. Also, from the same viewpoints, it is preferably 8 or more and 22 or less, more preferably 8 or more and 18 or less, even more preferably 8 or more and 16 or less, still more preferably 8 or more and 14 or less, still more preferably 8 or more and 12 or less, and still more preferably 8 or more and 10 or less. Specific examples of mono-fatty acid glyceryl as component (C1) include glyceryl caprylate, glyceryl caprate, glyceryl laurate, glyceryl myristate, and glyceryl palmitate, with one or two selected from glyceryl caprylate and glyceryl caprate being preferred.

[0043] [Fatty acid (C2)] The hair wash composition of the present invention may contain a fatty acid as component (C2) from the viewpoints of improving storage stability and smoothness during hair washing. Fatty acids are monocarboxylic acids having a carboxy group on the hydrocarbon chain. Component (C2) is considered to be a component that contributes to improving the storage stability of the hair wash composition and smoothness during hair washing, but it also contributes to smoothness during rinsing, foaming ability, and foam retention. The hydrocarbon chain of component (C2) may be a linear hydrocarbon chain or a branched hydrocarbon chain, and is preferably a linear hydrocarbon chain from the viewpoints of improving storage stability and smoothness during hair washing. Furthermore, this hydrocarbon chain may be a saturated hydrocarbon chain or an unsaturated hydrocarbon chain, and is preferably a linear saturated hydrocarbon chain from the viewpoints of improving storage stability and smoothness during hair washing. These may be used alone or in combination of two or more.

[0044] From the viewpoints of improving storage stability, smoothness during shampooing and rinsing, lathering ability, and lather retention, as well as irritation and odor, the number of carbon atoms in this component (C2) is preferably 8 or more, more preferably 10 or more, and even more preferably 12 or more, and from the viewpoints of improving lathering ability and smoothness during rinsing, and of achieving an appropriate formulation viscosity, the number of carbon atoms in component (C2) is preferably 22 or less, more preferably 18 or less, even more preferably 16 or less, and still more preferably 14 or less. From the same viewpoints, the number of carbon atoms in component (C2) is preferably 8 or more and 22 or less, more preferably 8 or more and 18 or less, even more preferably 10 or more and 16 or less, still more preferably 10 or more and 14 or less. Specific examples of this component (C2) include saturated fatty acids such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, 2-ethylhexanoic acid, and isostearic acid, and unsaturated fatty acids such as palmitoleic acid, oleic acid, linoleic acid, linolenic acid, and erucic acid. Of these, lauric acid and myristic acid are preferred from the same viewpoint as above.

[0045] [Higher alcohol (C3)] The hair wash composition of the present invention may contain a higher alcohol as component (C3) from the viewpoint of improving storage stability and smoothness during hair washing. The higher alcohol is a monohydric alcohol having an aliphatic group with 6 or more carbon atoms. Component (C3) is considered to be a component that particularly contributes to improving the smoothness of the hair wash composition during hair washing, and is also considered to be a component that contributes, together with component (C2), to improving the storage stability of the hair wash composition. Component (C3) also contributes to smoothness during rinsing, foaming ability, and foam retention. The aliphatic group of component (C3) may be a straight-chain aliphatic group or a branched-chain aliphatic group, with a straight-chain aliphatic group being preferred from the viewpoints of improving storage stability and smoothness upon washing. The aliphatic group may be a saturated aliphatic group or an unsaturated aliphatic group, with a saturated aliphatic group being preferred from the viewpoints of improving storage stability and smoothness upon washing. These may be used alone or in combination of two or more.

[0046] From the viewpoints of improving storage stability, smoothness during shampooing and rinsing, lathering ability, and lather retention, as well as irritation and odor, the number of carbon atoms in this component (C3) is preferably 8 or more, more preferably 10 or more, and even more preferably 12 or more, and from the viewpoints of improving lathering ability and smoothness during rinsing, and of achieving an appropriate formulation viscosity, the number of carbon atoms is preferably 22 or less, more preferably 18 or less, even more preferably 16 or less, and still more preferably 14 or less. Also, from the same viewpoints, the number of carbon atoms is preferably 8 or more and 22 or less, more preferably 10 or more and 18 or less, even more preferably 10 or more and 16 or less, still more preferably 10 or more and 14 or less, and even more preferably 12 or more and 14 or less. Specific examples of component (C3) include saturated linear aliphatic alcohols such as 1-octanol, 1-nonanol, 1-decanol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, 1-eicosanol, and behenyl alcohol; saturated branched aliphatic alcohols such as 2-ethylhexanol and isostearyl alcohol; and unsaturated aliphatic alcohols such as palmitoleic alcohol, oleyl alcohol, linoleyl alcohol, linolenyl alcohol, and erucyl alcohol. Among these, from the same viewpoint as above, one or two selected from lauryl alcohol and myristyl alcohol are preferred.

[0047] The hair wash composition of the present invention contains, as component (C), at least one selected from the group consisting of the above-mentioned components (C1) to (C3). This allows the hair wash composition to have excellent storage stability and smoothness during hair washing. To improve these properties, the hair wash composition preferably contains 1.5% by mass or more of component (C). The content of component (C) in the hair wash composition is preferably 2.0% by mass or more, more preferably 3.0% by mass or more, even more preferably 4.0% by mass or more, still more preferably 4.5% by mass or more, and preferably 12% by mass or less, more preferably 10% by mass or less, even more preferably 9.0% by mass or less, and still more preferably 8.0% by mass or less. From the same viewpoints as above, the content of component (C) is preferably 1.5% by mass or more and 12% by mass or less, more preferably 2.0% by mass or more and 10% by mass or less, even more preferably 2.0% by mass or more and 9.0% by mass or less, still more preferably 3.0% by mass or more and 9.0% by mass or less, still more preferably 4.0% by mass or more and 8.0% by mass or less, and still more preferably 4.5% by mass or more and 8.0% by mass or less.

[0048] In this case, components (C1) to (C3) constituting component (C) may be used alone or in combination. When components are used in combination, combinations of components (C1) and (C2), components (C1) and (C3), components (C2) and (C3), and components (C1), (C2), and (C3) may be mentioned. Among these combinations, the combination of components (C1), (C2), and (C3) is particularly preferred from the viewpoints of storage stability, smoothness during hair washing and rinsing, and lathering ability.

[0049] <Oil component (D) that is liquid at 25°C> From the viewpoint of improving smoothness during hair washing, the hair wash composition of the present invention contains, as component (D), an oily component other than components (C1) to (C3) that is liquid at 25° C. Component (D) also contributes to imparting smoothness and conditioning properties during rinsing. Here, "liquid at 25°C" means that the material has fluidity at 25°C and normal pressure, and is determined to be liquid in a liquid-solid determination test according to the American Society for Testing and Materials standard "ASTM D 4359-90: Standard Test Method for Determining Whether a Material is a Liquid or Solid."

[0050] Examples of oily components that are liquid at 25°C include hydrocarbons, glycerides, esters, silicones, fluorines, isostearyl glyceryl ether, and polyoxypropylene butyl ether. These may be used alone or in combination of two or more. Examples of hydrocarbons include straight-chain or branched-chain hydrocarbons, such as squalene, squalane, liquid paraffin, liquid isoparaffin, and cycloparaffin. Examples of glycerides include castor oil, cocoa oil, mink oil, avocado oil, and olive oil. Examples of esters include isopropyl palmitate, isopalmityl palmitate, isopropyl myristate, octyldodecyl myristate, hexyl laurate, cetyl lactate, propylene glycol monostearate, oleyl oleate, hexadecyl 2-ethylhexanoate, isononyl isononanoate, tridecyl isononanoate, and jojoba oil. Examples of silicones include dimethylpolysiloxane, methylphenylpolysiloxane, and dimethylcyclopolysiloxane. Examples of fluorine compounds include perfluoropolyethers.

[0051] From the viewpoints of improving lathering properties and hair care, particularly smoothness during hair washing, the content of component (D) in the hair wash composition is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.5% by mass or more, still more preferably 1.0% by mass or more, and preferably 17% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, still more preferably 5.0% by mass or less, and still more preferably 3.0% by mass or less. From the same viewpoints, the content of component (D) is preferably 0.05% by mass or more and 17% by mass or less, more preferably 0.1% by mass or more and 15% by mass or less, more preferably 0.1% by mass or more and 10% by mass or less, still more preferably 0.5% by mass or more and 5.0% by mass or less, still more preferably 1.0% by mass or more and 5.0% by mass or less, and still more preferably 1.0% by mass or more and 3.0% by mass or less. The hair wash composition of the present invention, even when containing component (D), can suppress separation of components and has good storage stability, and therefore the content of oily components can be made higher than in conventionally known hair wash compositions of the same type.

[0052] The above-mentioned components (A) to (D) are essential components in the hair wash composition of the present invention. From the viewpoints of improving storage stability and smoothness during hair washing, the total amount of these components (A) to (D) in the hair wash composition is preferably 9.0% by mass or more, more preferably 15% by mass or more, even more preferably 18% by mass or more, still more preferably 19% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, and still more preferably 24% by mass or less. From the same viewpoints, the total amount of components (A) to (D) is preferably 9.0% by mass or more and 50% by mass or less, more preferably 15% by mass or more and 40% by mass or less, even more preferably 18% by mass or more and 30% by mass or less, still more preferably 18% by mass or more and 24% by mass or less, and still more preferably 19% by mass or more and 24% by mass or less. The hair wash composition of the present invention, even when containing component (D), can suppress separation of components and has good storage stability, and therefore the content of oily components can be made higher than in conventionally known hair wash compositions of the same type.

[0053] <Component (E): Surfactant other than components (A), (A'), and (C)> The hair wash composition of the present invention may further contain a surfactant other than components (A), (A'), and (C) as component (E) for the purpose of enhancing the good properties of cleansing ability, smoothness during hair washing and rinsing, and foaming ability. Component (E) is an optional component. Component (E) used in the present invention includes, for example, nonionic surfactants, amphoteric surfactants, and cationic surfactants other than component (C1). Component (E) can be used alone or in combination of two or more. From the same viewpoint as above, it is preferable that component (E) contains one or more surfactants selected from the group consisting of nonionic surfactants and amphoteric surfactants other than component (C1). Examples of nonionic surfactants other than component (C1) include alkyl polyglycosides, polyoxyalkylene alkyl ethers, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid glyceryls, sorbitan fatty acid esters, polyoxyalkylene sorbitol fatty acid esters, (poly)ethylene glycol fatty acid esters, polyoxyalkylene fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, monoalkyl glyceryl ethers, monoalkenyl glyceryl ethers, and fatty acid monoalkanolamides, with polyoxyethylene fatty acid glyceryls and fatty acid monoalkanolamides being preferred. Specific examples of polyoxyethylene fatty acid glyceryls include coconut oil fatty acid PEG-7 glyceryl, and specific examples of fatty acid monoalkanolamides include cocamide MEA. Examples of amphoteric surfactants include betaine surfactants, amine oxide surfactants, and amino acid surfactants, and are preferably betaine surfactants. Specific examples of betaine surfactants include lauryl hydroxysultaine, lauramidopropyl betaine, and sodium cocoamphoacetate. When component (E) is contained, its content in the hair wash composition is preferably 0.5% by mass or more, more preferably 3.0% by mass or more, more preferably 5.0% by mass or more, and preferably 18% by mass or less, more preferably 10% by mass or less, and even more preferably 8.0% by mass or less. The content of component (E) is preferably 0.5% by mass or more and 18% by mass or less, more preferably 0.5% by mass or more and 10% by mass or less, even more preferably 3.0% by mass or more and 10% by mass or less, and even more preferably 5.0% by mass or more and 8.0% by mass or less.

[0054] <Aqueous medium> The hair wash composition of the present invention contains an aqueous medium. The aqueous medium is preferably composed mainly of water, and may further contain an aqueous medium other than water. Examples of the aqueous medium other than water include lower alcohols such as ethanol and isopropyl alcohol, and low-molecular-weight diols and triols having 6 or less carbon atoms, such as 1,3-butylene glycol, glycerin, ethylene glycol, propylene glycol, diethylene glycol, and dipropylene glycol. The water content in the aqueous medium is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and is preferably 100% by mass or less.

[0055] From the viewpoints of achieving appropriate viscosity properties of the hair wash composition and good solubility of other components, the content of the aqueous medium in the hair wash composition is preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, still more preferably 60% by mass or more, and preferably 90% by mass or less, more preferably 85% by mass or less, even more preferably 80% by mass or less, and still more preferably 75% by mass or less. From the same viewpoints, the content of the aqueous medium is preferably 30% by mass or more and 90% by mass or less, more preferably 40% by mass or more and 85% by mass or less, even more preferably 50% by mass or more and 80% by mass or less, and still more preferably 60% by mass or more and 75% by mass or less.

[0056] The hair wash composition of the present invention may contain other components in addition to the above-mentioned components as appropriate, provided that the purpose of the present invention is not impaired. Examples of such components include antioxidants, polymers, antidandruff agents, vitamins, bactericides, anti-inflammatory agents, preservatives, chelating agents, moisturizers, ceramides, fragrances, colorants, UV absorbers, pH adjusters, and other components typically incorporated into hair wash compositions.

[0057] The form of the hair wash composition of the present invention is not particularly limited, and it may be in any form such as liquid, foam, gel, paste, or cream, but is preferably in liquid, gel, or cream form.

[0058] The hair wash composition of the present invention has a viscosity and pH suitable for its form and method of use. The viscosity of the hair wash composition of the present invention is, from the viewpoint of storage stability, preferably 400 mPa·s or more, more preferably 900 mPa·s or more, even more preferably 1400 mPa·s or more, and still more preferably 2000 mPa·s or more, and, from the viewpoint of ease of handling as a hair wash composition, preferably 65000 mPa·s or less, more preferably 40000 mPa·s or less, even more preferably 35000 mPa·s or less, and still more preferably 30000 mPa·s or less. The viscosity of this hair wash composition is the viscosity at 30°C, and can be measured, for example, with a Brookfield viscometer, specifically by the method described in the examples.

[0059] From the viewpoints of storage stability and antiseptic properties, the pH of the hair wash composition of the present invention is preferably from 3.0 to 8.0, more preferably from 3.5 to 7.5, even more preferably from 4.0 to 7.0, and still more preferably from 4.5 to 6.5. The pH of this hair wash composition is the value at 25°C when diluted to 5% (20 times by mass) with ion-exchanged water, simulating the pH at the time of application to hair, and can be measured specifically by the method described in the Examples.

[0060] [Method for producing hair cleanser composition] The method for producing the hair wash composition of the present invention is not particularly limited. For example, the composition can be produced by blending components (A) to (D), and optionally components (A'), (B'), (E), and other components, using a known method and mixing them using a known stirring device or the like. In this process, the components may be mixed simultaneously, or a mixture of water-soluble components and a mixture of oil-soluble components may be prepared separately, and the blended components may be uniformly dissolved and then mixed to form the hair wash composition. For example, the hair wash composition is preferably prepared by the following procedure. First, a mixture of water-soluble components and a mixture of oil-soluble components are prepared separately. Specifically, a mixture of component (A), optionally blended components (A'), (E), and other water-soluble components, and a mixture of components (C) to (D) and other oil-soluble components are separately prepared. Next, these mixtures are heated to form homogeneous mixed solutions, and the water-soluble component mixture is cooled. Component (B) and optionally blended component (B') are added and dispersed. The oil-soluble components are gradually added to the water-soluble mixture while maintaining the heating temperature, and mixed. After mixing, the mixture is cooled to room temperature (25°C) to prepare the hair wash composition. By preparing the composition in this manner, a hair wash composition can be obtained which has excellent storage stability and provides excellent smoothness during hair washing. [Example]

[0061] The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited to the scope of the examples. Measurements and evaluations in the examples were carried out by the following methods.

[0062] <Viscosity> Approximately 100 mL of the hair wash composition obtained in each example was filled into a 110 mL transparent glass container, sealed, and allowed to stand at 30°C for at least 1 hour. After this, the viscosity was measured using a Brookfield viscometer TVM (TV-10, manufactured by Toki Sangyo Co., Ltd.) (rotor No. 3, 12 rpm, 1 minute later). When the viscosity was too high to be measured using the above device, the viscosity was measured using a Brookfield viscometer TVR with a helical stand (TVB-10, manufactured by Toki Sangyo Co., Ltd.) (rotor TC, 10 rpm, 1 minute later).

[0063] <ph> The pH of the hair wash composition obtained in each example was measured at 25°C using a pH meter (F-51, manufactured by Horiba, Ltd.) For measuring the pH of the hair wash composition, an aqueous dispersion obtained by diluting the hair wash composition with purified water to 5% was used.

[0064] <Storage stability> Approximately 100 mL of the hair wash composition obtained in each example was filled into a 110 mL transparent glass bottle, sealed, and stored for one week at -5°C, room temperature (RT: 25°C), and 50°C. The appearance after storage was visually observed and rated according to the following evaluation criteria. A rating of A under each condition was considered to be acceptable. [Evaluation criteria] A: No separation B: Separation Additionally, the overall evaluation of storage stability was rated as "good" when no separation occurred under all three conditions, "fair" when no separation occurred under one or two conditions, and "poor" when separation occurred under all three conditions. "Good" or "fair" results were rated as "pass," and "poor" results were rated as "fail."

[0065] <Smoothness after washing> A hair tress (prepared from chemically untreated hair of a Japanese woman) measuring approximately 20 g and 25 cm in length was wetted with tap water and then washed with a plain shampoo of the following composition using hot water at 35-40°C. 0.5 mL of each hair cleanser composition was applied to the washed hair tress. The tress was then gently held between both palms and rubbed together, repeating this motion for 30 strokes to create a lather. After lathering, the untangled hair tress was placed in a combing force measuring device (Utsunomiya Seiki Co., Ltd., "KOT-0303"), and a comb (10 pins, 2 mm in diameter, spaced 4 mm apart in a straight line) was inserted through the top of the tress. The load (gf) applied when the comb was passed through the hair to the ends at a speed of 31.3 cm / s was measured. The load was detected at 250 points at equal intervals (1 mm intervals) on a 25 cm long hair bundle, and the maximum value was taken as the "combing force." This procedure was repeated 20 times, and the average value was taken as the "smoothness during hair washing (combing force)." The smaller the "smoothness during hair washing (combing force)," the smoother the hair could be combed. The result of Comparative Example 1 was used as the standard (reference), and a standard ratio relative to this was calculated and shown in Tables 1 to 4 as the "standard ratio of smoothness during hair washing." A standard ratio of smoothness during hair washing of 0.50 or less was rated as "good," a value greater than 0.50 and less than 0.65 was rated as "fair," and a value greater than 0.65 was rated as "poor."

[0066] [Plain shampoo composition] *The amount of active ingredient is the amount of active ingredient (mass%). Polyoxyethylene (2.0) sodium lauryl ether sulfate (*C1): 47.2 Lauric acid diethanolamide (*C2): 2.5 Sodium benzoate: 1.1 Sodium chloride: 1.2 Ion-exchanged water: 86.6 Total:100.0 (*C1) 47.2% by mass of "Emeral 227" (active ingredient amount 27% by mass) manufactured by Kao Corporation (*C2) Aminone C-11S (Kao Corporation), active ingredient content 100% by mass <Overall evaluation of characteristics> In the evaluation of storage stability and smoothness during washing, examples in which both items were rated "good" or "acceptable" were designated as Examples, and examples in which at least one of the two items was rated "poor" were designated as Comparative Examples.

[0067] [Examples 1 to 28, Comparative Examples 1 to 7] (Preparation and Evaluation of Hair Cleansing Compositions) Components (A), (A'), cocamide methyl MEA, cocamide MEA, PEG-7 glyceryl cocoate, citric acid, and sodium hydroxide listed in Tables 1 to 4 were added to water, heated to 70°C, and dissolved with stirring to obtain a mixture of water-soluble components. Components (B) and (B') were then dispersed in water and added to the mixture of water-soluble components with stirring. Sodium cocoamphoacetate and lauramidopropyl betaine were then added, stirred, and cooled to below 50°C. Separately from this solution, components (C1), (C2), (C3), and (D) were mixed, heated to 60°C, and stirred to obtain a mixture of oil-soluble components. The mixture of oil-soluble components was added to the mixture of water-soluble components with stirring, and a fragrance was then added at below 40°C with stirring to obtain a hair wash composition.

[0068] The hair wash compositions obtained in each example were evaluated for storage stability and smoothness during hair washing using the methods described above. The results are shown in Tables 1 to 4. The blending amount (mass %) of each component shown in the table is the amount of active ingredient.

[0069] [Table 1]

[0070] [Table 2]

[0071] [Table 3-1]

[0072] [Table 3-2]

[0073] [Table 4]

[0074] The ingredients listed in the table are as follows: *1: Diapon K-FS (manufactured by NOF Corporation) *2: Alanon ALE (Kawaken Fine Chemicals Co., Ltd.) *3: Soypon SLTA (Kawaken Fine Chemicals Co., Ltd.) *4: Kao Akipo RLM-100NV (Kao Corporation) *5: SOFCARE KG-101W-E (Kao Corporation) *6: Soft Cat Polymer SL-30 (manufactured by The Dow Chemical Company) *7: NATERNAL C14 S (manufactured by Solvay (Novecare)) *8: Kachisero M-80 (Kao Corporation) *9: MERQUAT 550 (manufactured by Lubrizol Japan, Ltd.) *10: Sunsoft No. 707BS (Taiyo Kagaku Co., Ltd.) *11: Sunsoft No. 760-C (Taiyo Kagaku Co., Ltd.) *12: Lunac L-98 (Kao Corporation) *13: Kalcol 4098 (Kao Corporation) *14: NIKKOL Sugar Squalane (manufactured by Nippon Surfactant Kogyo Co., Ltd.) *15: Aminone C-11S (Kao Corporation) *16: Amizol CME (Kawaken Fine Chemicals Co., Ltd.) *17: Cetiol HE-JP (manufactured by BASF Japan Ltd.) *18: Softazoline CL-R (Kawaken Fine Chemicals Co., Ltd.) *19: Amphitheater 20AB (Kao Corporation) *20: Nissan Anon BDL-SF (manufactured by NOF Corporation) *21: Citric acid aqueous solution (Showa Kako Co., Ltd.) *22: 48% liquid caustic soda (manufactured by Nankai Chemical Co., Ltd.)

[0075] Tables 1 to 4 show that the hair wash compositions of the present invention (Examples 1 to 28) had good storage stability and smoothness during hair washing, even though they contained an oily component that was liquid at 25° C. On the other hand, the comparative examples, which contained a small amount of component (A), which is essential in the present invention, or did not contain any of components (B) to (D), were insufficient in either storage stability or smoothness during hair washing. [Industrial Applicability]

[0076] According to the present invention, a hair wash composition can be provided which has excellent storage stability and also provides an excellent feeling in use, such as smoothness during hair washing.< / ph>

Claims

1. The following components (A) to (D): (A) an amino acid-based anionic surfactant, (B) a cationic polymer which is at least one selected from the group consisting of the following components (B1) and (B2): (C) a hydrophobic amphiphilic substance which is at least one selected from the group consisting of monoglyceryl fatty acid (C1), fatty acid (C2), and higher alcohol (C3); and (D) an oily component that is liquid at 25°C; Contains A hair wash composition having a content of the component (A) of 2.0% by mass or more. (B1) A cationic group-containing copolymer which is a copolymer of a monomer mixture containing the following monomers (b1-1), (b1-2), and (b1-3): Monomer (b1-1) At least one vinyl monomer selected from the group consisting of vinyl monomers represented by the following general formula (1): 【Chemistry 1】 (In the formula, R １ represents a hydrogen atom or a methyl group, and R ２ represents a hydrogen atom, a linear or branched alkyl group or an alkenyl group having 1 to 4 carbon atoms, R ３ represents a linear or branched alkyl or alkenyl group having 1 to 4 carbon atoms. Monomer (b1-2) At least one vinyl monomer selected from the group consisting of vinyl monomers represented by the following general formula (2): 【Chemistry 2】 (In the formula, R １ represents the same group as above, and R ４ and R ５ each independently represents an alkyl group or an alkenyl group having 1 to 4 carbon atoms, R ６ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; Y １ is -O-, -NH-, -CH ２ - or -O-CH ２ represents a CH(OH)- group, and Y １ Ga-CH ２ When -, Z １ represents a single bond or a linear or branched divalent saturated hydrocarbon group having from 1 to 3 carbon atoms; Y １ Ga-CH ２ When not -, Z １ represents a linear or branched divalent saturated hydrocarbon group having 1 to 4 carbon atoms; and Q represents a conjugate base of an acid. Monomer (b1-3) Crosslinkable monomer having two or more reactive unsaturated groups (B2) A hydrophobic cationized hydroxyethyl cellulose having a main chain derived from an anhydroglucose represented by the following general formula (3), in which the average number of moles of cationized ethyleneoxy groups per anhydroglucose unit is 0.01 or more and 3.0 or less, and the average number of moles of ethyleneoxy groups is 0.5 or more and 4.0 or less: 【Transformation 3】 (In general formula (3), R ７ , R ８ and R ９ are each independently represented by the following general formula (4): 【Chemistry 4】 and n is the average degree of polymerization of anhydroglucose and is a number from 50 to 5,000. In general formula (4), Y ２ and Y ３ is a hydrogen atom on one side and a group represented by the following general formula (5) 【Transformation 5】 p represents the number of ethyleneoxy groups contained in the general formula (4), and q represents the number of cationized ethyleneoxy groups (—CH(Y ２ )-CH(Y ３ )-O-), each of which is 0 or a positive integer. When neither p nor q is 0, the order of addition of the cationized ethyleneoxy group and the ethyleneoxy group does not matter, and when p and / or q is 2 or greater, either a block bond or a random bond may be used. When a plurality of substituents represented by general formula (4) are present in a molecule, the values ​​of p and q may be different among the substituents, but at least one of them has a q of 1 or greater. In general formula (5), R １０ ~R １２ each independently represents a linear or branched alkyl group having 1 to 18 carbon atoms; X － represents an anionic group. １２ At least one of the groups is a linear or branched alkyl group having 8 to 18 carbon atoms.

2. The hair wash composition according to claim 1, wherein the content of the component (B) is 0.1% by mass or more and 3.0% by mass or less.

3. The hair wash composition according to claim 1, wherein the content of the component (C) is 1.5% by mass or more and 12% by mass or less.

4. The hair wash composition according to claim 1, wherein the content of the component (D) is from 0.05% by mass to 17% by mass.

5. The hair wash composition according to claim 1, wherein the content of the component (A) is 20% by mass or less.

6. 2. The hair wash composition according to claim 1, wherein the component (B1) is N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer.

7. 2. The hair wash composition according to claim 1, wherein the component (B2) is a polymer of a quaternary ammonium salt obtained by addition reaction of hydroxyethyl cellulose with a trimethylammonium-substituted epoxide and a lauryldimethylammonium-substituted epoxide.