Hair detergent composition or fiber detergent composition for headwear product

Abstract

[Problem] To provide a hair detergent composition or a fiber detergent composition for a headwear product, said composition having excellent storage stability, good foaming properties during washing when applied to hair and to fibers for headwear products such as wigs, and an excellent user experience in terms of smoothness and the like during washing and rinsing.　Namely, the present invention provides a hair detergent composition or a fiber detergent composition for a headwear product, said composition containing the following components (A) to (C): (A) a hydrophobic amphiphilic substance comprising a fatty acid (A1) having 16 or fewer carbon atoms, an aliphatic alcohol (A2) having 16 or fewer carbon atoms, and a monoacylglycerol (A3) having 16 or fewer carbon atoms in the acyl group; (B) a surfactant comprising an anionic surfactant (B1); and (C) water, the total content of components (A1) to (A3) being at least 3% by mass.

Description

Hair cleanser composition or fiber cleanser composition for head accessories

[0001] The present invention relates to a hair wash composition or a fabric wash composition for head accessories.

[0002] Hydrophobic amphiphiles are hydrophobic substances that have both hydrophilic and hydrophobic groups in their molecules. Such hydrophobic amphiphiles, such as fatty acids and fatty alcohols, are known to form various molecular aggregates in aqueous solutions. Shampoos containing liquid crystal structures as molecular aggregates have been known to have properties such as improved composition stability and enhanced adhesion of active ingredients to the scalp. For example, a personal care skin or hair cleansing product with stable viscosity is known (Patent Document 1). This product uses a fatty acid acyl isethionate surfactant, which has good foaming properties, is gentle on the skin, and has good emollient properties, and is formulated with a surfactant liquid crystal inducer and liquid crystal regulator (such as a fatty acid or a fatty alcohol) (Patent Document 1). Another known personal care composition contains sodium cocoyl alanine, a glyceryl ester, an antidandruff agent, and a liquid carrier, is substantially free of sulfated surfactants, and is designed to gently cleanse the scalp and reliably deliver antidandruff actives to the scalp (Patent Document 2). Also known is a shampoo composition that contains (A) a cationic surfactant, (B) an oil component not containing silicon atoms, and (C) a cleansing surfactant, and that contains a liquid crystal structure in which specific components are dispersed in a specific blend ratio, and that reduces the squeaky feeling that occurs on hair when rinsing (Patent Document 3).

[0003] (Patent Document 1) JP-A-2010-513621 (Patent Document 2) JP-A-2023-549165 (Patent Document 3) WO 2004 / 45568

[0004] The present invention relates to a hair wash composition or a fabric wash composition for head accessories, comprising the following components (A) to (C): (A) a hydrophobic amphiphilic substance comprising a fatty acid (A1) having 16 or less carbon atoms, a fatty alcohol (A2) having 16 or less carbon atoms, and a monoglyceryl fatty acid having an acyl group having 16 or less carbon atoms (A3); (B) a surfactant comprising an anionic surfactant (B1); and (C) water, wherein the total content of components (A1), (A2), and (A3) is 3% by mass or more, and the composition preferably has a lamellar liquid crystal structure.

[0005]

[0003] A hair wash composition is generally desired to have high detergency, but improving the detergency may remove essential components and oils from hair during shampooing, which may lead to dryness and brittleness of hair. To address this issue, a technique of incorporating hydrophobic care ingredients such as oils to suppress dryness and brittleness of hair is known. However, the incorporation of hydrophobic care ingredients may result in deterioration of storage stability, such as separation of the components of the hair wash composition, reduced foaming ability, and a poor usability, such as an unpleasant washing sensation during hair washing and a squeaky feeling during rinsing. Even in the compositions described in the above patent documents that contain fatty acids or the like and employ a liquid crystal structure, when used for hair washing, the compositions were insufficient in terms of storage stability, foaming ability during shampooing, and usability, such as smoothness during shampooing and rinsing, making commercialization extremely difficult. Therefore, an object of the present invention is to provide a hair wash composition or a head accessory fiber wash composition which has excellent storage stability, exhibits good foaming properties during washing when applied to hair or fibers for head accessories such as wigs, and also has an excellent feel during use, such as smoothness during washing and rinsing.

[0006] The present inventors have found that the above-mentioned problems can be solved by providing a hair wash composition that contains a hydrophobic amphiphilic substance containing a predetermined component, a surfactant including an anionic surfactant, and water, and that preferably has a lamellar liquid crystal structure.

[0007] The hair wash composition or the fiber cleanser composition for head accessories of the present invention can provide a hair wash composition or a fiber cleanser composition for head accessories that has excellent storage stability, exhibits good foaming properties during washing when applied to hair or fibers for head accessories such as wigs, and also has an excellent feel during use, such as smoothness during washing and rinsing.

[0008] 1 shows a scattering pattern obtained by analyzing by small-angle X-ray scattering (SAXS) the hair wash composition or the fabric cleanser composition for head accessories of Example 3. 2 shows a scattering pattern obtained by analyzing by wide-angle and small-angle X-ray diffraction (XRD) the hair wash composition or the fabric cleanser composition for head accessories of Example 3. 3 shows a polarizing microscope photograph of the hair wash composition or the fabric cleanser composition for head accessories of Example 3. Detailed Description of the Invention

[0009] [Hair cleanser composition or fiber cleanser composition for head accessories] The hair cleanser composition or fiber cleanser composition for head accessories of the present invention comprises the following components (A) to (C): (A) a hydrophobic amphiphilic substance including a fatty acid (A1) having 16 or less carbon atoms, an aliphatic alcohol (A2) having 16 or less carbon atoms, and a monoglyceryl fatty acid (A3) having an acyl group having 16 or less carbon atoms, (B) a surfactant including an anionic surfactant (B1), and (C) water, wherein the total content of components (A1), (A2), and (A3) is 3 mass% or more. Due to the above-described configuration, the hair cleanser composition or fiber cleanser composition for head accessories of the present invention is a hair cleanser composition or fiber cleanser composition for head accessories that has excellent storage stability, good foaming during washing when applied to hair or fibers for head accessories such as wigs, and an excellent feel during use, such as smoothness during washing and rinsing.

[0010] <Definitions> In the present invention, the hair wash composition and the fiber cleanser composition for head accessories are hereinafter collectively referred to as "hair wash composition." In this specification, "head accessories" refers to, for example, hair wigs, hairpieces, weaving, hair extensions, braided hair, hair accessories, doll hair, etc. In this specification, "fibers for head accessories" refers to fibers used in the above-mentioned head accessories. In the present specification, "cleaning when applied to fibers for head accessories such as hair and wigs" is hereinafter simply referred to as "hair washing." In the present specification, "hair" primarily refers to human hair, but also includes hair cut from a human head and fibers for head accessories. In the present specification, "comprising component X" or "containing component X" also means "composed of component X." In the present specification, storage stability at -5°C, room temperature (RT: 25°C), 50°C, and an AFS cycle test (Accelerated Four Seasons Cycle Test) is used as an index of "storage stability." If the composition satisfies all the conditions, it can be suitably used as a hair wash composition under various usage environments, such as low temperature, high temperature, and environments with temperature changes. In the present invention, the combing force (combing load) during hair washing and rinsing is used as an index of "usage feel." If the hair wash composition is easy to comb and smooth both during hair washing and rinsing, it can be suitably used as a hair wash composition.

[0011] The reason why the hair wash composition of the present invention exhibits the effects of the present invention due to the above-described configuration is not clear, but is presumed to be as follows. The hair wash composition of the present invention contains, as component (A), a hydrophobic amphiphilic substance including a fatty acid (A1) having 16 or fewer carbon atoms, an aliphatic alcohol (A2) having 16 or fewer carbon atoms, and a monoglyceryl fatty acid in an acyl group having 16 or fewer carbon atoms (A3), and further contains, as component (B), a surfactant including an anionic surfactant (B1), and as component (C), water. It is known that surfactants and long-chain fatty acids are generally key components for forming a liquid crystal structure. However, the present inventors have found that by further incorporating an aliphatic alcohol having 16 or fewer carbon atoms and a fatty acid glyceryl having an acyl group having 16 or fewer carbon atoms in addition to a fatty acid having 16 or fewer carbon atoms, the composition tends to maintain stability while improving dispersibility upon dilution. This is thought to be because the liquid crystal structure changes from that of conventional compositions, becoming different in form and maintaining stability, while the structure collapses upon dilution, improving dispersibility. As a result, it is presumed that the foam properties change, resulting in rich foaming and less foam breakage, improving foam retention, and also improving the smoothness of hair during washing and rinsing, making it easier to run your fingers through.The hair wash composition of the present invention is considered to preferably have a lamellar liquid crystal structure as such a liquid crystal structure.

[0012] The hair wash composition of the present invention is applicable to hair, including fibers for head accessories as described above, with hair being preferred. Fibers for head accessories may be either naturally-derived or synthetic fibers, with naturally-derived fibers being preferred. Naturally-derived fibers refer to fibers collected from natural plants and animals (excluding human hair) or artificially produced fibers made from proteins, polysaccharides, and the like. Among these, the naturally-derived fibers are preferably animal hair or fibers artificially produced from proteins or polysaccharides, such as keratin, collagen, casein, and proteins derived from soybeans, peanuts, corn, silk, and the like. More preferred are regenerated protein fibers made from keratin, collagen, casein, soybean protein, peanut protein, corn protein, silk protein (e.g., silk fibroin), and the like. Even more preferred are regenerated protein fibers, such as regenerated collagen fibers made from collagen and regenerated silk fibers made from silk fibroin, with regenerated collagen fibers being even more preferred. Regenerated collagen fibers can be produced using known techniques. The composition of regenerated collagen fibers does not need to be 100% collagen, and may contain natural polymers, synthetic polymers, additives, etc. to improve quality. Furthermore, regenerated collagen fibers may be post-processed or post-treated. Filaments are preferred as the form of regenerated collagen fibers. Filaments are generally removed from bobbins or boxes. In addition, filaments emerging from the drying process in the regenerated collagen fiber manufacturing process can also be used directly.

[0013] Examples of synthetic fibers include fibers containing a synthetic resin as a main component. From the viewpoint of ease of production of synthetic fibers and achieving a texture similar to that of human hair, the synthetic resin is preferably a thermoplastic resin, more preferably at least one selected from the group consisting of polyester resin, polyamide resin, polyimide resin, polyamideimide resin, vinyl chloride resin, polycarbonate resin, polyphenylene sulfide resin, and modacrylic resin (a copolymer of acrylonitrile and vinyl chloride). The term "main component" as used herein refers to a component whose content in the synthetic fiber is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, and even more preferably 90% by mass or more, but not more than 100% by mass. In addition to the synthetic resin, the synthetic fiber may further contain various components such as a flame retardant, a flame retardant auxiliary, a light or heat stabilizer, a fluorescent agent, an antioxidant, an antistatic agent, and an ultraviolet absorber, provided that the effects of the present invention are not impaired.

[0014] As described above, the hydrophobic amphiphilic substance (A) used in the present invention is a component containing a fatty acid (A1) having 16 or less carbon atoms, an aliphatic alcohol (A2) having 16 or less carbon atoms, and a monoglyceryl fatty acid (A3) having an acyl group having 16 or less carbon atoms. It is preferable that component (A) does not contain any components other than components (A1) to (A3), that is, component (A) is a hydrophobic amphiphilic substance consisting of components (A1) to (A3).

[0015] [Component (A1)] The hair wash composition of the present invention contains, as component (A), a fatty acid (A1) having 16 or less carbon atoms, from the viewpoints of improving storage stability, foaming ability, and smoothness during hair washing and rinsing. The fatty acid is a monocarboxylic acid having a carboxy group in the hydrocarbon chain, and here, a fatty acid having 16 or less carbon atoms is used. Component (A1) is considered to be a component that particularly contributes to improving the stability of the hair wash composition. The hydrocarbon chain of component (A1) may be a linear or branched hydrocarbon chain, and from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, it is preferable that it is a linear hydrocarbon chain. Furthermore, the hydrocarbon chain may be a saturated or unsaturated hydrocarbon chain, and from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, it is preferable that it is a saturated hydrocarbon chain.

[0016] The number of carbon atoms in this component (A1) is preferably 8 or more, more preferably 10 or more, from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, as well as from the viewpoints of irritation and odor, and is preferably 14 or less, from the viewpoints of improving foaming ability, foam retention, and smoothness during hair washing and rinsing. From these viewpoints, the number of carbon atoms in component (A1) is preferably 8 or more and 16 or less, more preferably 8 or more and 14 or less, and even more preferably 10 or more and 14 or less. Specific examples of component (A1) include saturated fatty acids such as caprylic acid, capric acid, lauric acid, myristic acid, and palmitic acid, and unsaturated fatty acids such as myristoleic acid, palmitoleic acid, and sapienic acid, and these can be used singly or in combination of two or more.

[0017] [Component (A2)] The hair wash composition of the present invention contains, as component (A), an aliphatic alcohol (A2) having 16 or less carbon atoms, from the viewpoint of improving storage stability, foaming ability, and smoothness during hair washing and rinsing. Component (A2) is considered to be a component that particularly contributes to improving the usability of the hair wash composition (smoothness during hair washing and rinsing). The aliphatic group of component (A2) may be a straight-chain aliphatic group or a branched-chain aliphatic group, and from the viewpoint of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, a straight-chain aliphatic group is preferred. Furthermore, this aliphatic group may be a saturated aliphatic group or an unsaturated aliphatic group, and from the viewpoint of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, a saturated aliphatic group is preferred.

[0018] The number of carbon atoms in this component (A2) is preferably 10 or more, more preferably 12 or more, from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, and from the viewpoints of irritation and odor, and is preferably 14 or less, from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, and from the same viewpoints, is preferably 10 to 16, more preferably 12 to 16, and even more preferably 12 to 14. Specific examples of component (A2) include decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, etc., and these can be used alone or in combination of two or more.

[0019] [Component (A3)] The hair wash composition of the present invention contains, as component (A), a mono-fatty acid glyceryl (A3) having an acyl group containing 16 or less carbon atoms, from the viewpoint of improving storage stability, foaming properties, and smoothness during hair washing and rinsing. The mono-fatty acid glyceryl is a mono-fatty acid ester of glycerin, and here, a compound having an acyl group containing 16 or less carbon atoms and derived from a fatty acid is used. Component (A3) is considered to be a component that particularly contributes to improving the foaming properties and foam retention of the hair wash composition. The hydrocarbon chain of component (A3) may be a linear or branched hydrocarbon chain, and from the viewpoint of improving storage stability, foaming properties, foam retention, and smoothness during hair washing and rinsing, it is preferably a linear hydrocarbon chain. Furthermore, the hydrocarbon chain may be a saturated or unsaturated hydrocarbon chain, and from the viewpoint of improving storage stability, foaming properties, foam retention, and smoothness during hair washing and rinsing, it is preferably a saturated hydrocarbon chain.

[0020] The number of carbon atoms in the acyl group of this component (A3) is preferably 8 or more from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, as well as from the viewpoints of irritation and odor, and from the viewpoints of improving foaming ability, foam retention, and smoothness during hair washing and rinsing, it is preferably 14 or less, more preferably 12 or less, and from the same viewpoints, it is preferably 8 to 16, more preferably 8 to 14, and even more preferably 8 to 12. Specific examples of mono-fatty acid glyceryls for component (A3) include glyceryl caprylate, glyceryl caprate, glyceryl laurate, and glyceryl myristate, and these can be used alone or in combination of two or more.

[0021] The number of carbon atoms in the acyl group of this component (A3) is preferably 8 or more from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, as well as from the viewpoints of irritation and odor, and from the viewpoints of improving foaming ability, foam retention, and smoothness during hair washing and rinsing, it is preferably 14 or less, more preferably 12 or less, and from the same viewpoints, it is preferably 8 to 16, more preferably 8 to 14, and even more preferably 8 to 12. Specific examples of mono-fatty acid glyceryls for component (A3) include glyceryl caprylate, glyceryl caprate, glyceryl laurate, and glyceryl myristate, and these can be used alone or in combination of two or more.

[0022] In the present invention, component (A) contains all of the components (A1) to (A3). This allows for a hair wash composition that has excellent properties in all aspects, including storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing. To achieve all of these properties, the hair wash composition contains components (A1) to (A3) in a total amount of 3% by mass or more. The total content of components (A1), (A2), and (A3) in the hair wash composition is 3% by mass or more, preferably 3.5% by mass or more, more preferably 4.0% by mass or more, even more preferably 4.5% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 12% by mass or less, and even more preferably 10% by mass or less. Furthermore, from the same viewpoint as above, the total content of component (A1), component (A2), and component (A3) is 3% by mass or more, preferably 3% by mass or more and 20% by mass or less, more preferably 3.5% by mass or more and 15% by mass or less, even more preferably 4.0% by mass or more and 12% by mass or less, and still more preferably 4.5% by mass or more and 10% by mass or less.

[0023] In this case, the preferred contents of each of components (A1) to (A3) contained in component (A) are as follows. From the viewpoints of achieving good storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, the content of component (A1) in the hair wash composition is preferably 0.3% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.7% by mass or more, and preferably 10% by mass or less, more preferably 7% by mass or less, and even more preferably 5% by mass or less. From the same viewpoints as above, the content of component (A1) is preferably 0.3% by mass or more and 10% by mass or less, more preferably 0.5% by mass or more and 7% by mass or less, and even more preferably 0.7% by mass or more and 5% by mass or less. From the same viewpoints as above, the content of component (A1) in component (A) is preferably 3% by mass or more, more preferably 5% by mass or more, and preferably 70% by mass or less, more preferably 65% ​​by mass or less, and even more preferably 60% by mass or less. Furthermore, from the same viewpoints as above, the content of component (A1) in component (A) is preferably 3% by mass or more and 70% by mass or less, more preferably 5% by mass or more and 65% by mass or less, and even more preferably 5% by mass or more and 60% by mass or less.

[0024] From the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, the content of component (A2) in the hair wash composition is preferably 0.3% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.7% by mass or more, and preferably 10% by mass or less, more preferably 7% by mass or less, and even more preferably 5% by mass or less. From the same viewpoints as above, the content of component (A2) is preferably 0.3% by mass or more and 10% by mass or less, more preferably 0.5% by mass or more and 7% by mass or less, and even more preferably 0.7% by mass or more and 5% by mass or less. From the same viewpoints as above, the content of component (A2) in component (A) is preferably 3% by mass or more, more preferably 5% by mass or more, even more preferably 10% by mass or more, and preferably 70% by mass or less, more preferably 65% ​​by mass or less, and even more preferably 60% by mass or less. Furthermore, from the same viewpoints as above, the content of component (A2) in component (A) is preferably 3% by mass or more and 70% by mass or less, more preferably 5% by mass or more and 65% by mass or less, and even more preferably 10% by mass or more and 60% by mass or less.

[0025] From the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, the content of component (A3) in the hair wash composition is preferably 0.3% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.7% by mass or more, still more preferably 1.0% by mass or more, still more preferably 1.5% by mass or more, and preferably 10% by mass or less, more preferably 7% by mass or less, and even more preferably 5% by mass or less. From the same viewpoints as above, the content of component (A3) is preferably 0.3% by mass or more and 10% by mass or less, more preferably 0.5% by mass or more and 7% by mass or less, even more preferably 0.7% by mass or more and 7% by mass or less, still more preferably 1.0% by mass or more and 5% by mass or less, and still more preferably 1.5% by mass or more and 5% by mass or less. From the same viewpoints as above, the content of component (A3) in component (A) is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% 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. Also, from the same viewpoints as above, the content of component (A3) in component (A) is preferably 5% by mass or more and 90% by mass or less, more preferably 10% by mass or more and 85% by mass or less, even more preferably 15% by mass or more and 80% by mass or less.

[0026] In the hair wash composition of the present invention, the mass ratio of the content of component (A2) to the content of component (A1) [(A2) / (A1)] is preferably 0.5 to 3, more preferably 1 to 3, and even more preferably 1 to 2.5, from the viewpoints of improving storage stability, foaming ability, cleansing ability, and smoothness during hair washing and rinsing. Furthermore, the mass ratio of the content of component (A3) to the content of component (A1) [(A3) / (A1)] is preferably 0.5 to 5, more preferably 0.7 to 5, and even more preferably 0.8 to 4.5, from the viewpoints of improving storage stability, foaming ability, cleansing ability, and smoothness during hair washing and rinsing. Furthermore, the mass ratio of the content of component (A3) to the content of component (A2) [(A3) / (A2)] is preferably 0.3 to 4, and even more preferably 0.4 to 3, from the viewpoints of improving storage stability, foaming ability, cleansing ability, and smoothness during hair washing and rinsing.

[0027] <Hydrophobic Amphiphilic Substance (A')> The hair wash composition of the present invention may contain a hydrophobic amphiphilic substance (A') other than components (A1) to (A3) as the hydrophobic amphiphilic substance, as long as the effects of the present invention are not impaired. Here, component (A') is a fatty acid other than component (A1), a fatty alcohol other than component (A2), or a monoglyceryl fatty acid other than component (A3). Specifically, component (A1') is a fatty acid (A1') having more than 16 carbon atoms, a fatty alcohol (A2') having more than 16 carbon atoms, or a monoglyceryl fatty acid (A3') having more than 16 carbon atoms in the acyl group. Examples of component (A1') include stearic acid, oleic acid, linoleic acid, arachidic acid, behenic acid, and erucic acid. Examples of component (A2') include stearyl alcohol, isostearyl alcohol, oleyl alcohol, linoleyl alcohol, arachidyl alcohol, behenyl alcohol, and erucyl alcohol. Examples of component (A3') include glyceryl stearate, glyceryl isostearate, glyceryl oleate, glyceryl linoleate, glyceryl arachidate, glyceryl behenate, glyceryl erucate, etc. In the present invention, the total content of components (A1) to (A3) [[(A1) + (A2) + (A3)] / [(A1) + (A2) + (A3) + (A')] × 100], based on the total content of components (A1) to (A3) and the content of component (A'), is preferably 80% by mass or more, more preferably 90% by mass or more, even more preferably 95% by mass or more, and still more preferably 100% by mass, from the viewpoints of improving storage stability, lathering ability, foam retention, and smoothness during hair washing and rinsing.

[0028] <Surfactant (B)> The hair wash composition of the present invention contains a surfactant (B) from the viewpoints of improving storage stability, foaming properties, and smoothness during hair washing and rinsing. This surfactant (B) is a component containing an anionic surfactant (B1). This component (B) contains the anionic surfactant (B1) as an essential component and may also contain, for example, one or more surfactants selected from the group consisting of amphoteric surfactants (B2), nonionic surfactants (B3), and cationic surfactants (B4). That is, as component (B), component (B1) may be used alone, or component (B1) may be used in combination with one or more selected from the group consisting of the above-exemplified components (B2) to (B4).

[0029] [Anionic Surfactant (B1)] The anionic surfactant (B1) is not particularly limited, as long as it is a known anionic surfactant used in hair wash compositions other than the fatty acid of component (A1). Specific examples of the anionic surfactant include sulfate ester salts, sulfonate salts, carboxylate salts other than component (A1), and phosphate salts. Examples of sulfate ester salts include alkyl or alkenyl ether sulfate ester salts and alkyl or alkenyl sulfate ester salts. Examples of sulfonate salts include alkyl sulfonate salts, α-olefin sulfonate salts, internal olefin sulfonate salts, alkyl benzene sulfonate salts, alkyl naphthalene sulfonate salts, α-sulfosuccinate salts, and α-sulfofatty acid salts. Examples of carboxylate salts other than component (A1) include fatty acid salts having 17 or more carbon atoms, alkyl or alkenyl ether carboxylate salts, and N-acylamino acid salts. Examples of phosphate salts include phosphoric acid monoester or diester salts. As the anionic surfactant, one or more of these can be used. From the viewpoint of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, the hydrocarbon group such as an alkyl group or an alkenyl group or the constituent fatty acid of the anionic surfactant preferably has from 8 to 22 carbon atoms, more preferably from 8 to 18 carbon atoms, and even more preferably from 10 to 18 carbon atoms. Examples of counter ions of the anionic group of the anionic surfactant include alkali metal ions such as sodium ion and potassium ion; alkaline earth metal ions such as calcium ion and magnesium ion; ammonium ion; and alkanolammonium having 1 to 3 alkanol groups each having 2 or 3 carbon atoms (for example, monoethanolammonium, diethanolammonium, triethanolammonium, triisopropanolammonium, etc.).

[0030] Among the above, from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during shampooing and rinsing, the anionic surfactant preferably contains one or more selected from the group consisting of alkyl sulfates, alkyl ether sulfates, alkyl ether carboxylates, olefin sulfonates, and N-acylamino acid salts. Examples of the alkyl sulfates include sodium lauryl sulfate. Examples of alkyl ether sulfates include polyoxyethylene alkyl ether sulfates such as sodium laureth sulfate and ammonium laureth sulfate. Examples of alkyl ether carboxylates include polyoxyethylene alkyl ether carboxylates such as sodium laureth carboxylate. Examples of olefin sulfonates include α-olefin sulfonates and internal olefin sulfonates. Examples of N-acylamino acid salts include sodium lauroyl methylalanine, sodium cocoyl methyl taurate, lauroyl sarcosine triethanolamine, and N-acyl glutamate. From the viewpoints of improving storage stability, foaming properties, foam retention, and smoothness during hair washing and rinsing, the anionic surfactant preferably contains one or more selected from the group consisting of alkyl ether sulfates, alkyl ether carboxylates, olefin sulfonates, alkyl naphthalene sulfonates, and N-acyl amino acid salts, and more preferably contains one or more selected from the group consisting of sodium laureth sulfate, ammonium laureth sulfate, sodium internal olefin sulfonate, sodium lauroylmethylalanine, sodium laureth acetate, and sodium alkyl naphthalene sulfonate.

[0031] [Amphoteric Surfactant (B2)] The amphoteric surfactant (B2) is not particularly limited as long as it is a known amphoteric surfactant used in hair wash compositions. Examples of amphoteric surfactants include betaine surfactants, amine oxide surfactants, and amino acid surfactants. These may be used alone or in combination of two or more. Examples of betaine surfactants include carboxybetaine surfactants such as alkyldimethylaminoacetic acid betaine and fatty acid amidopropyl betaine; sulfobetaine surfactants such as alkylsulfobetaine and alkylhydroxysulfobetaine; imidazoline betaine surfactants; and phosphobetaine surfactants. Examples of alkyldimethylaminoacetic acid betaines include those having an alkyl group preferably having from 8 to 22 carbon atoms, more preferably from 10 to 20 carbon atoms. Specific examples include lauryldimethylaminoacetic acid betaine and stearyldimethylaminoacetic acid betaine. Examples of fatty acid amidopropyl betaines include those having an acyl group preferably having from 8 to 18 carbon atoms, more preferably from 10 to 16 carbon atoms. Specific examples include lauric acid amidopropyl betaine (lauramidopropyl betaine), palm kernel oil fatty acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine (cocamidopropyl betaine), etc. The alkyl sulfobetaine preferably includes an alkyl sulfobetaine having an alkyl group having from 8 to 22 carbon atoms, more preferably from 10 to 18 carbon atoms. Specific examples of alkyl sulfobetaine include lauryl dimethyl sulfoethyl betaine, lauryl dimethyl sulfopropyl betaine, myristyl dimethyl sulfoethyl betaine, myristyl dimethyl sulfopropyl betaine, stearyl dimethyl sulfoethyl betaine, stearyl dimethyl sulfopropyl betaine, coconut oil fatty acid dimethyl sulfopropyl betaine, etc. The alkyl hydroxy sulfobetaine preferably includes an alkyl group having from 8 to 22 carbon atoms, more preferably from 10 to 18 carbon atoms, and at least one hydroxy group.Specific examples of alkyl hydroxy sulfobetaines include lauryl dimethyl sulfo(hydroxyethyl)betaine, lauryl dimethyl sulfo(hydroxypropyl)betaine [lauryl hydroxy sulfobetaine], myristyl dimethyl sulfo(hydroxyethyl)betaine, myristyl dimethyl sulfo(hydroxypropyl)betaine, stearyl dimethyl sulfo(hydroxypropyl)betaine, bis-(2-hydroxyethyl)sulfoethyl betaine, and lauryl bis-(2-hydroxyethyl)sulfopropyl betaine. Examples of imidazoline betaine types include 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, a specific example of which is sodium cocoamphoacetate. Examples of phosphobetaine types include lauryl hydroxyphosphobetaine. From the viewpoints of improving storage stability, foaming properties, foam retention, and smoothness during hair washing and rinsing, the amphoteric surfactant preferably includes one or more selected from the group consisting of carboxybetaine types and imidazoline betaine types, more preferably includes one or more selected from the group consisting of fatty acid amidopropyl betaine and imidazoline betaine types, and even more preferably includes one or more selected from the group consisting of lauramidopropyl betaine and sodium cocoamphoacetate.

[0032] [Nonionic Surfactant (B3)] The nonionic surfactant (B3) is not particularly limited, and may be any known nonionic surfactant used in hair wash compositions other than the aliphatic alcohol of component (A2) and the monoglyceryl fatty acid of component (A3). Examples of nonionic surfactants include alkyl polyglycosides; polyoxyalkylene alkyl ethers such as polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, and polyoxyethylene isostearyl ether; polyoxyethylene hydrogenated castor oil; polyoxyethylene fatty acid glyceryl; sorbitan fatty acid esters; polyoxyalkylene sorbitol fatty acid esters; (poly)ethylene glycol fatty acid esters such as polyethylene glycol fatty acid esters; polyoxyalkylene fatty acid esters; polyoxyalkylene sorbitan fatty acid esters such as polyoxyethylene sorbitan fatty acid esters; monoalkyl glyceryl ethers such as 2-ethylhexyl glyceryl ether and isodecyl glyceryl ether; monoalkenyl glyceryl ethers; and fatty acid monoalkanolamides such as coconut oil fatty acid monoethanolamide and coconut oil fatty acid N-methylmonoethanolamide. The alkyl group in the nonionic surfactant may be linear or branched. These may be used alone or in combination of two or more. From the viewpoints of improving storage stability, foaming properties, foam retention, and smoothness during hair washing and rinsing, the nonionic surfactant preferably contains one or more selected from the group consisting of polyoxyethylene fatty acid glyceryl, fatty acid monoalkanolamide, and monoalkyl glyceryl ether, and more preferably contains one or more selected from the group consisting of polyoxyethylene coconut oil fatty acid monoethanolamide, coconut oil fatty acid monoethanolamide, 2-ethylhexyl glyceryl ether, and isodecyl glyceryl ether.

[0033] [Cationic Surfactant (B4)] In the hair wash composition of the present invention, a cationic surfactant can be used as needed. Specific examples of the cationic surfactant include tertiary amine compounds or salts thereof, and quaternary ammonium salts. Examples of the cationic surfactant include mono- or di-long-chain alkyl quaternary ammonium salts represented by the following general formula: [In the formula, R 11 is a saturated or unsaturated, straight-chain or branched alkyl group having 8 to 22 carbon atoms; R 15 CONH(CH2) m -, R 15 —O—(CH2) m - or R 15 COO(CH2) m - (R 15 represents a saturated or unsaturated, linear or branched alkyl group having 7 to 21 carbon atoms, and m represents a number of 1 to 4. 12 is a hydrogen atom, a saturated or unsaturated linear or branched alkyl group having 1 to 22 carbon atoms, or 15 CONH(CH2) m -, R 15 —O—(CH2) m - or R 15 COO(CH2) m represents a group represented by -, and R 13 and R 14 represents a hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms; Y - represents a chloride ion, a bromide ion, or a methosulfate ion.] Specific examples of the cationic surfactant, from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, preferably include one or more selected from the group consisting of monoalkyltrimethylammonium chloride, dialkyldimethylammonium chloride, monoalkyloxyalkyltrimethylammonium chloride, monoalkyltrimethylammonium bromide, alkylamidopropyldimethylamine salts, and alkylhydroxypropyldimethylamine salts (such as organic acid salts of lactic acid and the like, and glutamic acid salts).

[0034] The hair wash composition of the present invention contains the surfactant (B) as described above. From the viewpoints of improving foaming properties and cleansing properties and reducing irritation, the content of the surfactant (B) in the hair wash composition is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 15% by mass or more, and preferably 30% by mass or less, more preferably 27% by mass or less, and even more preferably 25% by mass or less. From the same viewpoints, the content of the surfactant (B) is preferably 5% by mass or more and 30% by mass or less, more preferably 10% by mass or more and 27% by mass or less, and even more preferably 15% by mass or less.

[0035] In the hair wash composition of the present invention, the mass ratio of the content of component (A) to the content of component (B) [(A) / (B)] is preferably 0.1 or more, more preferably 0.15 or more, and even more preferably 0.2 or more, from the viewpoints of improving storage stability, foaming ability, cleansing properties, and smoothness during hair washing and rinsing, and is preferably 1.0 or less, more preferably 0.75 or less, and even more preferably 0.5 or less, from the viewpoints of improving storage stability, foaming ability, and smoothness during rinsing, and easy-to-handle liquid properties. Also, from the same viewpoints, it is preferably 0.1 or more and 1.0 or less, more preferably 0.15 or more and 0.75 or less, and even more preferably 0.2 or more and 0.5 or less.

[0036] From the viewpoints of improving lathering properties, cleansing properties, and smoothness during hair washing and rinsing, the content of the anionic surfactant (B1) in the hair wash composition is preferably 5% by mass or more, more preferably 7% by mass or more, even more preferably 9% by mass or more, still more preferably 10% by mass or more, and preferably 25% by mass or less, more preferably 22% by mass or less, even more preferably 20% by mass or less, still more preferably 18% by mass or less, and still more preferably 17% by mass or less. From the same viewpoints, the content is, for example, 5% by mass or more and 25% by mass or less, preferably 7% by mass or more and 22% by mass or less, more preferably 9% by mass or more and 20% by mass or less, still more preferably 10% by mass or more and 18% by mass or less, and still more preferably 10% by mass or more and 17% by mass or less.

[0037] In the hair wash composition of the present invention, the mass ratio [(B1) / (B)] of the content of the anionic surfactant (B1) to the content of the component (B) is preferably at least 0.3, more preferably at least 0.4, even more preferably at least 0.5, and preferably at most 1.0, more preferably at most 0.9, and even more preferably at most 0.8, from the viewpoints of improving lathering ability, cleansing ability, and smoothness during hair washing and rinsing, and of achieving an appropriate viscosity. From the same viewpoints, the mass ratio [(B1) / (B)] is preferably at least 0.3 and at most 1.0, more preferably at least 0.4 and at most 0.9, and even more preferably at most 0.8.

[0038] <Water (C)> The hair wash composition of the present invention contains water (C) as an essential component. As component (C), deionized water or distilled water is preferred from the viewpoints of improving foaming properties, cleansing properties, and smoothness during hair washing and rinsing, and of obtaining a stable lamellar liquid crystal structure. However, tap water or groundwater sterilized with hypochlorous acid or the like may also be used as long as the stability of the lamellar liquid crystal structure of the present invention is not impaired.

[0039] From the viewpoints of improving lathering properties, cleansing properties, and smoothness during hair washing and rinsing, and of ensuring that the viscosity of the hair wash composition is appropriate, the water content in the hair wash composition is preferably at least 30% by mass, more preferably at least 40% by mass, even more preferably at least 50% by mass, still more preferably at least 55% by mass, and is preferably at most 90% by mass, more preferably at most 85% by mass, and still more preferably at most 80% by mass. From the same viewpoints, the water content is from 30 to 90% by mass, from 40 to 85% by mass, from 50 to 80% by mass, or from 55 to 80% by mass.

[0040] <Lamellar Liquid Crystal Structure> The hair wash composition of the present invention preferably contains the components (A) to (C) and has a lamellar liquid crystal structure as described above. As described above, amphiphilic substances such as surfactants having hydrophilic and hydrophobic groups in the molecule can self-assemble in an aqueous or oily medium, with the hydrophilic groups and hydrophobic groups facing each other to form molecular aggregates such as micelles or liquid crystals. In the present invention, by blending water with component (A) and component (B), a lamellar liquid crystal structure is formed in which bilayer membranes composed of component (B) are layered with water interposed therebetween. The formation of this lamellar liquid crystal structure is thought to exhibit a separation-inhibiting effect, particularly in compositions blended with insoluble components, and to improve the storage stability of the hair wash composition. In a hair wash composition containing components (A) to (C), by containing all of components (A1) to (A3) and setting the contents thereof in the composition within the above-mentioned ranges, a lamellar liquid crystal structure is stably formed. Furthermore, by selecting the types and total contents of components (A1) to (A3), the combination with component (B), and the ratios of components (A) to (C), it is possible to adjust the foaming ability, foam quality, foam retention, and smoothness during hair washing and rinsing.

[0041] Whether or not a hair wash composition has a lamellar liquid crystal structure can be determined by small-angle X-ray scattering (SAXS) and wide-angle small-angle X-ray scattering (XRD). More specifically, SAXS and XRD measurements are performed on the composition, and the angle between the repeating plane of the structural body contained in the composition and the X-ray is defined as θ (°), the horizontal axis represents the scattering angle 2θ, and the vertical axis represents the intensity. If peak separation is unclear, peak division is performed using a Gaussian function, and the resulting peak pattern can be used to identify the liquid crystal structure. For example, if multiple peaks are observed at positions that are integer ratios in the SAXS dispersion pattern, a layered structure can be confirmed. Furthermore, if there is no clear peak near 20° in the XRD dispersion pattern (the peak surrounded by a dashed line in Figure 2), it can be confirmed that the alkyl chain packing is in a liquid crystal state. By taking these factors into consideration, it can be determined that the composition has a lamellar liquid crystal structure. Note that SAXS and XRD measurements can be specifically performed by the methods described in the Examples.

[0042] <Cationic Polymer (D)> The hair wash composition of the present invention may further contain a cationic polymer (D) from the viewpoint of enhancing smoothness during hair washing and rinsing. This cationic polymer is an optional component. In this specification, the term "cationic polymer" refers to a water-soluble polymer that has cationic groups and has an overall cationic charge, and the term "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.

[0043] Examples of the cationic polymer used in the present invention include cationic polygalactomannans such as cationized guar gum, cationized tara gum, and cationized locust bean gum; cationic cellulose; cationic hydroxyalkyl celluloses such as cationized hydroxyethyl cellulose and cationized hydroxypropyl cellulose; cationic starch; cationic polyvinyl alcohol; quaternized dialkylaminoalkyl (meth)acrylate polymers such as vinylpyrrolidone / N,N-dimethylaminoethyl diethyl methacrylate sulfate copolymer and N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer; polydiallyldimethylammonium chloride, diallyldimethylammonium chloride / acrylic acid copolymer, diallyldimethylammonium chloride / acrylamide copolymer, and the like. Examples of the polymer include diallyl quaternized ammonium salt polymers such as allyldimethylammonium chloride / acrylic acid / acrylamide copolymers; vinylimidazolium trichloride / vinylpyrrolidone copolymers; vinylpyrrolidone / alkylaminoalkyl (meth)acrylate copolymers; vinylpyrrolidone / alkylaminoalkyl (meth)acrylate / vinyl caprolactam copolymers; vinylpyrrolidone / (meth)acrylamidopropyl trimethylammonium chloride copolymers; alkylacrylamide / (meth)acrylate / alkylaminoalkylacrylamide / polyethylene glycol (meth)acrylate copolymers; adipic acid / dimethylaminohydroxypropyl ethylenetriamine copolymers; and cationic polymers described in JP-A-53-139734 and JP-A-60-36407. One or more of these may be used.

[0044] Among these, from the viewpoint of enhancing smoothness during hair washing and rinsing, the cationic polymer preferably contains one or more selected from the group consisting of cationized polygalactomannan, cationized hydroxyalkyl cellulose, quaternized dialkylaminoalkyl (meth)acrylate polymer, and diallyl quaternary ammonium salt polymer, more preferably contains one or more selected from the group consisting of cationized guar gum, cationized hydroxyalkyl cellulose, and quaternized dialkylaminoalkyl (meth)acrylate polymer, and even more preferably contains one or more selected from the group consisting of cationized hydroxyalkyl cellulose and quaternized dialkylaminoalkyl (meth)acrylate polymer.

[0045] Commercially available cationized guar gum products include JAGUAR Excel, JAGUAR C-17, and JAGUAR C-14-S (all manufactured by Solvay (Novecare)). Of the 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)), Polyquaternium-67: SoftCAT (manufactured by The Dow Chemical Company), and the like. Commercially available cationized hydroxypropyl cellulose products include SOFCARE C-HP2W (manufactured by Kao Corporation). Among quaternized dialkylaminoalkyl (meth)acrylate polymers, commercially available N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer products include POLYQUATERNIUM-52: SOFCARE KG-101E and SOFCARE KG-101W-E (both manufactured by Kao Corporation). Among diallyl quaternized ammonium salt polymers, commercially available diallyldimethylammonium chloride / acrylamide copolymer products include POLYQUATERNIUM-7: MERQUAT 550 (manufactured by Lubrizol). Commercially available diallyldimethylammonium chloride / acrylic acid / acrylamide polymer products include POLYQUATERNIUM-39: MERQUAT 3331PR (manufactured by Lubrizol). The cationic polymers may be used alone or in combination of two or more.

[0046] When a cationic polymer is used, its content in the hair wash composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, and preferably 2.0% by mass or less, more preferably 1.5% by mass or less, and even more preferably 1.0% by mass or less, from the viewpoints of achieving appropriate viscosity properties, improving foaming and foam retention during hair washing, and smoothness during hair washing and rinsing, and of imparting conditioning properties. From the same viewpoints, the content of the cationic polymer is preferably from 0.1% by mass to 2.0% by mass, more preferably from 0.2% by mass to 1.5% by mass, and even more preferably from 0.3% by mass to 1.0% by mass.

[0047] <Oil (E)> The hair wash composition of the present invention may further contain an oil other than component (A) as component (E) from the viewpoints of improving the emulsion stability of the composition, improving smoothness during hair washing and rinsing, and imparting conditioning properties. Examples of oils include hydrocarbons, glycerides, waxes, esters, silicones, fluorines, ethers, etc., and these may be used alone or in combination of two or more. Examples of hydrocarbons include linear or branched 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 waxes include beeswax, spermaceti, lanolin, and carnauba wax. 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, and tridecyl isononanoate. Examples of silicones include dimethylpolysiloxane, methylphenylpolysiloxane, and dimethylcyclopolysiloxane. Examples of fluorine-containing compounds include perfluoropolyethers. Examples of ethers include isostearyl glyceryl ether and polyoxypropylene butyl ether. Among these, from the viewpoints of improving smoothness during shampooing and rinsing and imparting conditioning properties, component (D) preferably includes one or more compounds selected from the group consisting of hydrocarbons, glycerides, and esters, and more preferably includes one or more compounds selected from the group consisting of isopalmityl palmitate, olive oil, and squalane.

[0048] When an oil is used, its content in the hair wash composition is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, and still more preferably 5% by mass or less, from the viewpoints of improving the emulsion stability of the composition, improving smoothness during hair washing and rinsing, and imparting conditioning properties. Furthermore, from the same viewpoints, the content of the oil is preferably 0.1% by mass or more and 20% by mass or less, more preferably 0.5% by mass or more and 15% by mass or less, even more preferably 1.0% by mass or more and 10% by mass or less, and still more preferably 1.0% by mass or more and 5% by mass or less. Since the hair wash composition of the present invention preferably has a lamellar liquid crystal structure as described above, separation and the like can be suppressed even when an oil is contained, and storage stability can be improved. Therefore, the content of the oil can be made higher than in conventionally known hair wash compositions of the same type.

[0049] 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 other than component (D), antidandruff agents, vitamins, bactericides, anti-inflammatory agents, preservatives, chelating agents, moisturizers, ceramides, fragrances, colorants, UV absorbers, pH adjusters, and the like, which are typically incorporated into hair wash compositions other than components (A) to (E).

[0050] 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.

[0051] The hair wash composition of the present invention has a viscosity and pH suitable for its form and usage. It preferably contains a lamellar liquid crystal structure at the temperature of use, and more preferably contains the liquid crystal structure at 25°C from the viewpoints of ease of handling and versatility.

[0052] The viscosity of the hair wash composition of the present invention is preferably 200 mPa s or more, more preferably 300 mPa s or more, and even more preferably 500 mPa s or more from the viewpoint of storage stability, and is preferably 50,000 mPa s or less, more preferably 45,000 mPa s or less, and even more preferably 40,000 mPa s or less from the viewpoint of ease of handling as a hair wash composition. The viscosity of this hair wash composition is the viscosity at 30°C, and can be measured, for example, with a B-type viscometer, specifically, by the method described in the examples.

[0053] From the viewpoint of storage stability, 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, and even more preferably from 4.0 to 7.0. 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 specifically measured by the method described in the Examples.

[0054] [Method of Producing Hair Cleanser Composition] The method of producing the hair cleanser composition of the present invention is not particularly limited. For example, the hair cleanser composition can be produced by blending components (A) to (C), and optionally components (D) to (E), and other components, using a known method and mixing them using a known stirrer or the like. In this case, it is preferable to separately prepare a mixture of water-soluble components and a mixture of oil-soluble components, dissolve the blended components uniformly, and then mix them to obtain the hair cleanser composition. To efficiently obtain a lamellar liquid crystal structure, it is preferable to prepare the hair cleanser composition by, for example, the following procedure. First, a mixture of water-soluble components and a mixture of oil-soluble components are separately prepared. Specifically, a mixture of components (B), (C), and optionally (D) and other water-soluble components, and a mixture of component (A), optionally (E), and other oil-soluble components are separately prepared. Next, these mixtures are each heated to obtain a uniform mixed solution, and then gradually mixed while maintaining the temperature. After mixing, the mixture is cooled to room temperature (25°C) to obtain the hair cleanser composition. By preparing the mixture in this manner, a bilayer membrane is easily formed during the preparation of the mixture of water-soluble components, and a hair wash composition having a desirable lamellar liquid crystal structure can be efficiently prepared.

[0055] In relation to the above-described embodiments, the present invention further discloses the following hair wash composition or fabric cleanser composition for head accessories. [1] A hair wash composition or fabric cleanser composition for head accessories, comprising the following components (A) to (C): (A) a hydrophobic amphiphilic substance including a fatty acid (A1) having 16 or less carbon atoms, an aliphatic alcohol (A2) having 16 or less carbon atoms, and a monoglyceryl fatty acid (A3) having 16 or less carbon atoms in the acyl group, (B) a surfactant including an anionic surfactant (B1), and (C) water, wherein the total content of components (A1), (A2), and (A3) is 3 mass% or more. [2] The hair wash composition or fabric cleanser composition for head accessories according to [1], wherein component (A1) has a carbon number in the range of 8 to 16. [3] The hair wash composition or fabric cleanser composition for head accessories according to [1] or [2], wherein component (A2) has a carbon number in the range of 10 to 16. [4] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to [3], wherein the number of carbon atoms in the acyl group of component (A3) is in the range of 8 to 12. [5] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to [4], further containing a cationic polymer (D). [6] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to [5], further containing an oily agent (E). [7] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to [6], wherein the total content of components (A1), (A2), and (A3) is 3% to 20% by mass. [8] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to [7], wherein the content of component (A1) is 0.3% to 10% by mass. [9] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to [8], wherein the content of component (A1) in component (A) is 3% by mass or more and 70% by mass or less.

[10] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to [9], wherein the content of component (A2) is 0.3% by mass or more and 10% by mass or less.

[11] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[10] , wherein the content of component (A2) in component (A) is 3% by mass or more and 70% by mass or less.

[12] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[11] , wherein the content of component (A3) is 0.3% by mass or more and 10% by mass or less.

[13] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[12] , wherein the content of component (A3) in component (A) is 5% by mass or more and 90% by mass or less.

[14] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[13] , further comprising a hydrophobic amphiphilic substance (A') other than components (A1) to (A3).

[15] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[14] , wherein the mass ratio [(A2) / (A1)] of the content of component (A2) to the content of component (A1) is 0.5 to 3.

[16] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[15] , wherein the mass ratio [(A3) / (A1)] of the content of component (A3) to the content of component (A1) is 0.5 to 5.

[17] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[16] , wherein the mass ratio [(A3) / (A2)] of the content of component (A3) to the content of component (A2) is 0.3 to 4.

[18] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[17] , wherein the content of component (B) is 5% by mass or more and 30% by mass or less.

[19] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[18] , wherein the content of component (B1) is 5% by mass or more and 25% by mass or less.

[20] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[19] , wherein the mass ratio [(B1) / (B)] of the content of component (B1) to the content of component (B) is 0.3 or more and 1.0 or less.

[21] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[20] , wherein the component (B1) comprises one or more selected from the group consisting of alkyl sulfate salts, alkyl ether sulfate salts, alkyl ether carboxylate salts, olefin sulfonates, and N-acylamino acid salts.

[22] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[21] , further comprising an amphoteric surfactant (B2) as the component (B).

[23] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[22] , wherein the mass ratio [(A) / (B)] of the content of the component (A) to the content of the component (B) is 0.1 or more and 1.0 or less.

[24] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [5] to

[23] , wherein the component (D) comprises one or more selected from the group consisting of cationized polygalactomannan, cationized hydroxyalkyl cellulose, quaternized dialkylaminoalkyl (meth)acrylate polymer, and diallyl quaternary ammonium salt polymer.

[25] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [5] to

[24] , wherein the content of the component (D) is 0.1% by mass or more and 2.0% by mass or less.

[26] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [6] to

[25] , wherein the content of the component (E) is 0.1% by mass or more and 20% by mass or less.

[0056] 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.

[0057] <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 that, 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).

[0058] <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 a concentration of 5% was used.

[0059] <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 was then visually observed and evaluated according to the following criteria. The AFS cycle test (Accelerated Four Seasons Cycle Test) was conducted by filling 30 g of each hair wash composition into a screw tube (volume: 50 mL), sealing the tube, and subjecting it to a temperature cycle test. The temperature cycle test involves a 6-hour cycle with a temperature change of 40°C. The first cycle starts from 0°C to 40°C, followed by -1°C to 39°C in the second cycle, -2°C to 38°C in the third cycle, and so on, with the temperature changing by 1°C each time. After 168 hours, the minimum temperature reaches -28°C, and from there, the minimum temperature increases by 1°C toward 0°C. After 2 weeks (336 hours), the screw tube was removed, and the state of layer separation of the composition was visually evaluated and rated according to the following criteria. For each condition, an A or B rating was considered to be acceptable. [Evaluation criteria] A: No separation B: Slight separation (less than 5% of the volume), but no problem C: Separation (5% or more of the volume)

[0060] <Lathering during hair washing> A 15 g bundle (tress) of healthy hair (5 cm wide x 30 cm long) was lathered with 1.5 g of each hair wash composition for 30 seconds (approximately 50 times), and then all the foam was collected and measured. In this specification, a sufficient amount of foam of 180 mL or more is considered acceptable.

[0061] <Feeling in Use> (Smoothness During Hair Washing) A 15 g bundle (5 cm wide x 30 cm long) of healthy hair was used, and 1.5 g of the hair cleanser composition of each example was used to lather for 30 seconds (approximately 50 times), followed by detangling and combing 10 times. The average combing force for each time was recorded as the numerical value for smoothness during hair washing, and is shown in Tables 1 to 4. The combing force was measured by placing a 25 cm long bundle of hair in a combing force measuring device ("KOT-0303" manufactured by Utsunomiya Seiki Co., Ltd.), passing a comb (10 pins with a diameter of 2 mm arranged in a line at 4 mm intervals) through the top of the bundle, and passing the comb through to the ends at a speed of 27.2 cm / sec. The load (gf) applied was measured. The load was detected at 250 equally spaced points (1 mm intervals) on the 25 cm long bundle of hair, and the maximum value was recorded as the "combing force." This operation was repeated 10 times, and the average value was used as the evaluation value for "combing force." The smaller the combing load, the smoother the combing. A combing load of 600 gf or less is considered to be a pass, indicating excellent smoothness during hair washing.

[0062] (Smoothness during rinsing) Using a 15 g hair tress (5 cm wide x 30 cm long) of healthy hair, 1.5 g of the hair wash composition of each example was lathered for 30 seconds (approximately 50 times), then rinsed with 40°C warm water for 20 seconds, detangled, and combed 10 times. The average value of the combing force for each time was taken as the numerical value of smoothness during rinsing, and is shown in Tables 1 to 4. The combing force was measured in the same manner as for the smoothness during hair washing. The smaller the value of the combing load, the easier and smoother the combing, and a value of 850 gf or less was considered to be a pass mark for excellent smoothness during rinsing.

[0063] Examples 1 to 26, Comparative Examples 1 to 9 (Preparation and Evaluation of Hair Wash Compositions) According to the formulations shown in Tables 1 to 4, components (B) to (D) and other water-soluble components (lactic acid, citric acid, sodium hydroxide) were first added to water, and the mixture was heated to 70°C and mixed to obtain a mixture of uniformly dissolved water-soluble components. Next, components (A), (E), and other oil-soluble components (excluding fragrance) were separately mixed, and the mixture was heated to 60°C and mixed to obtain a mixture of oil-soluble components. Each of these mixtures was adjusted to a temperature of 50°C. Next, while maintaining this temperature, the oil-based component mixture was gradually added to the water-soluble component mixture with stirring, and after uniform mixing, the mixture was cooled to 25°C to obtain a hair wash composition having a lamellar liquid crystal structure. The fragrance, a volatile component, was added during the cooling process when the temperature fell below 40°C.

[0064] The hair wash compositions obtained in each example were evaluated for storage stability, foaming ability, and smoothness during hair washing and rinsing using the methods described above. The results are shown in Tables 1 to 4. The blending amount (% by mass) of each component shown in the tables is the amount of active ingredient.

[0065]

[0066]

[0067]

[0068]

[0069] The ingredients listed in the table are as follows: *1: Lunac 8-98, manufactured by Kao Corporation *2: Lunac 10-98, manufactured by Kao Corporation *3: Lunac L-98, manufactured by Kao Corporation *4: Lunac MY-98, manufactured by Kao Corporation *5: Lunac P-95, manufactured by Kao Corporation *6: Kalcol 1098, manufactured by Kao Corporation *7: Kalcol 2098, manufactured by Kao Corporation *8: Kalcol 4098, manufactured by Kao Corporation *9: Kalcol 6098, manufactured by Kao Corporation *10: Sunsoft 700P, manufactured by Taiyo Chemical Co., Ltd. *11: Sunsoft 707BS, manufactured by Taiyo Chemical Co., Ltd. *12: Sunsoft 760C, manufactured by Taiyo Chemical Co., Ltd. *13: Sunsoft 750C, manufactured by Taiyo Chemical Co., Ltd. *14: Emeral 125A, manufactured by Kao Corporation *15: Anhithol 20AB, manufactured by Kao Corporation *16: Amizol CME, manufactured by Kawaken Fine Chemical Co., Ltd. *17: Softcat SL-30, manufactured by The Dow Chemical Company *18: Sofcare KG101W-E, manufactured by Kao Corporation *19: Exepar IPP, manufactured by Kao Corporation *20: Olive oil (refined), manufactured by Oleomonterreal, S.L. *21: Sugar squalane, manufactured by Nippon Surfactant Industry Co., Ltd. *22: Fermented lactic acid 90%, manufactured by Purac Thailand Ltd. *23: Soypon SLTA, manufactured by Kawaken Fine Chemical Co., Ltd. *24: Alanon ALE, manufactured by Kawaken Fine Chemical Co., Ltd. *25: Diapon K-SF, manufactured by NOF Corporation *26: Kao Akipo RLM-100NV, manufactured by Kao Corporation *27: Perex DH-60, manufactured by Kao Corporation *28: Nissan Anon BDL-SFK, manufactured by NOF Corporation *29: Softazoline CL-R, manufactured by Kawaken Fine Chemicals Co., Ltd. *30: Aminone C-11S, manufactured by Kao Corporation *31: Cetiol HE-JP, manufactured by BASF Japan Ltd. *32: NATERNAL C14 S, manufactured by Solvay Nicca Co., Ltd. *33: Katsicero L-150, manufactured by Kao Corporation *34: Citric acid (50%), manufactured by Showa Kako Co., Ltd. *35: 48% caustic soda, manufactured by Nankai Chemical Co., Ltd. *36: Lunac S-98, manufactured by Kao Corporation *37: Kalcol 8098, manufactured by Kao Corporation *38: Sunsoft 8000V, manufactured by Taiyo Kagaku Co., Ltd.

[0070] It is clear from Tables 1 to 4 that the hair wash compositions of the present invention (Examples 1 to 24) were good in all aspects of storage stability, foaming ability, and smoothness during hair washing and rinsing. On the other hand, the comparative examples which did not contain or contained a small amount of a part of the component (A) essential in the present invention were insufficient in at least any of storage stability, foaming ability, and smoothness during hair washing and rinsing.

[0071] The scattering pattern obtained by SAXS analysis for the hair wash composition of Example 3 is shown in Figure 1, and the scattering pattern obtained by XRD analysis is shown in Figure 2. Since multiple peaks in the scattering pattern obtained by SAXS analysis were observed at positions corresponding to integer ratios (Figure 1), and there was no clear peak near 20° in the XRD (Figure 2), it was determined that the hair wash composition had a lamellar liquid crystal structure. Furthermore, the hair wash composition of Example 3 was set on a slide glass and observed using a polarizing microscope (ECLIPSE E800, manufactured by Nikon Corporation). The results are shown in Figure 3. A glossy layered structure was also confirmed in Figure 3, confirming the presence of a lamellar liquid crystal structure. The other examples were also confirmed to have a lamellar liquid crystal structure.

[0072] According to the present invention, it is possible to provide a hair wash composition that has excellent storage stability, good foaming properties during hair washing, and an excellent feel during use, such as smoothness during hair washing and rinsing.

Claims

1. A hair wash composition or a fabric wash composition for head accessories, comprising the following components (A) to (C): (A) a hydrophobic amphiphilic substance comprising a fatty acid (A1) having 16 or less carbon atoms, a fatty alcohol (A2) having 16 or less carbon atoms, and a monoglyceryl fatty acid in an acyl group having 16 or less carbon atoms (A3); (B) a surfactant comprising an anionic surfactant (B1); and (C) water, wherein the total content of components (A1), (A2), and (A3) is 3% by mass or more.

2. A hair cleansing composition or a fabric cleansing composition for head accessories according to claim 1, wherein the number of carbon atoms in component (A1) is in the range of 8 to 16.

3. A hair cleanser composition or a fabric cleanser composition for head accessories according to claim 1 or 2, wherein the number of carbon atoms in component (A2) is in the range of 10 to 16.

4. A hair wash composition or a fabric wash composition for head accessories according to any one of claims 1 to 3, wherein the number of carbon atoms in the acyl group of component (A3) is in the range of 8 to 12.

5. A hair cleanser composition or a fabric cleanser composition for head accessories according to any one of claims 1 to 4, further comprising a cationic polymer (D).

6. A hair cleanser composition or a fabric cleanser composition for head accessories according to any one of claims 1 to 5, further comprising an oily agent (E).

7. The hair wash composition or the fabric wash composition for head accessories according to any one of claims 1 to 6, wherein the total content of component (A1), component (A2), and component (A3) is 3% by mass or more and 20% by mass or less.

8. The hair wash composition or fabric wash composition for head accessories according to any one of claims 1 to 7, further comprising a hydrophobic amphiphilic substance (A') other than components (A1) to (A3).

9. The hair wash composition or fabric cleanser composition for head accessories according to any one of claims 1 to 8, wherein the mass ratio of the content of component (A2) to the content of component (A1) [(A2) / (A1)] is 0.5 to 3.

10. The hair wash composition or fabric cleanser composition for head accessories according to any one of claims 1 to 9, wherein the mass ratio of the content of component (A3) to the content of component (A1) [(A3) / (A1)] is 0.5 to 5.

11. The hair wash composition or fabric cleanser composition for head accessories according to any one of claims 1 to 10, wherein the mass ratio of the content of component (A3) to the content of component (A2) [(A3) / (A2)] is 0.3 to 4.

12. A hair wash composition or a fabric wash composition for head accessories according to any one of claims 1 to 11, wherein the mass ratio [(A) / (B)] of the content of component (A) to the content of component (B) is 0.1 or more and 1.0 or less.

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