Hair detergent composition or fiber detergent composition for head decorative products

Abstract

To provide a hair detergent composition or a fiber detergent composition for a head ornament product, which is excellent in storage stability, has good foaming properties during washing when applied to hair or a fiber for a head ornament product such as wig, and is also excellent in feeling of use such as smoothness during washing and rinsing.SOLUTION: A hair cleansing composition or a fiber cleansing composition for head decorative products, comprising the following components (A) to (C), wherein the total content of the components (A1) to (A3) is 3% by mass or more: (A) hydrophobic amphiphiles including fatty acids having 16 or less carbon atoms (A2), fatty alcohols having 16 or less carbon atoms (A3), and glyceryl monofatty acids having an acyl group having 16 or less carbon atoms (B1); A1.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] A hydrophobic amphiphilic substance is a hydrophobic substance having both a hydrophilic group and a hydrophobic group in the molecule, and such hydrophobic amphiphilic substances, such as fatty acids and fatty alcohols, are known to form various molecular aggregates in aqueous solution. Shampoos having liquid crystal structures as such molecular aggregates have been known to have properties such as improving the stability of the composition and adhering active ingredients to the scalp. For example, a skin or hair cleansing product for personal care that has a stable viscosity is known, which uses a fatty acid acyl isethionate surfactant that foams well, is gentle on the skin, and has good emollient properties, and is blended with a surfactant liquid crystal inducer and a liquid crystal regulator (such as a fatty acid or a fatty alcohol) (Patent Document 1). Also known is a personal care composition that contains sodium cocoyl alanine, a glyceryl ester, an anti-dandruff agent, and a liquid carrier, is substantially free of sulfated surfactants, and is intended to gently cleanse the scalp and reliably deliver the anti-dandruff active substance to the scalp (Patent Document 2). Also known is a shampoo composition that contains (A) a cationic surfactant, (B) an oil that does not contain 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). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2010-513621 [Patent Document 2] Special Publication No. 2023-549165 [Patent Document 3] International Publication No. 2004 / 45568 Summary of the Invention [Problem to be solved by the invention]

[0004]

[0003] Hair wash compositions are generally desired to have high detergency, but improving the detergency may remove essential components and oils from hair during washing, which may cause dryness and brittleness of hair. To address this issue, a technique of incorporating a hydrophobic care component such as an oil agent to suppress dryness and brittleness of hair is also known. However, incorporating a hydrophobic care component may result in poor storage stability, such as separation of the components in the hair wash composition, reduced foaming ability, or a poor usability, such as an unpleasant washing sensation during hair washing or a squeaky feeling during rinsing. Even in the compositions containing fatty acids and the like and employing a liquid crystal structure described in the above patent documents, when the compositions were used to wash hair, they were insufficient in terms of storage stability, foaming properties during hair washing, and usability such as smoothness during hair washing and rinsing, making commercialization extremely difficult.

[0005] 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. [Means for solving the problem]

[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. That is, the present invention provides 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 (A3) having an acyl group having 16 or less carbon atoms; (B) a surfactant containing an anionic surfactant (B1), and (C) Water; The present invention relates to a hair wash composition or a fabric wash composition for head accessories, which contains the components (A1), (A2), and (A3) in a total content of 3 mass% or more and preferably has a lamellar liquid crystal structure. [Effects of the Invention]

[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. [Brief explanation of the drawings]

[0008] [Figure 1] 1 shows scattering patterns obtained by analyzing the hair wash composition or the fabric wash composition for head accessories of Example 3 by small-angle X-ray scattering (SAXS). [Figure 2] 1 shows scattering patterns obtained by analyzing the hair wash composition or the fabric wash composition for head accessories of Example 3 by wide-angle and small-angle X-ray diffraction (XRD). [Figure 3] 1 is a polarizing microscope photograph of the hair wash composition or the fabric wash composition for head accessories of Example 3. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Hair cleansing composition or fabric cleansing composition for head accessories] The hair wash composition or the fiber wash composition for head accessories of the present invention comprises 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 (A3) having an acyl group having 16 or less carbon atoms; (B) a surfactant containing an anionic surfactant (B1), and (C) Water; wherein the total content of component (A1), component (A2), and component (A3) is 3 mass% or more. The hair wash composition or the fiber cleanser composition for head accessories of the present invention, having the above-mentioned constitution, is a hair wash composition or a fiber cleanser composition for head accessories that has excellent storage stability, foams well 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.

[0010] <Definition> In the present invention, the hair wash composition and the fiber wash composition for head accessories will hereinafter be collectively referred to simply as "hair wash composition". In this specification, the term "headwear product" refers to, for example, hair wigs, hairpieces, weaving, hair extensions, braided hair, hair accessories, doll hair, and the like. In this specification, the term "fiber for head accessories" refers to fibers used in the head accessories. In the present invention, "cleaning when applied to hair or fibers for head accessories such as wigs" will hereinafter be simply referred to as "hair washing." In the present invention, "hair" primarily refers to human hair, but also includes hair cut off from the human head, as well as fibers for head accessories. 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.), 50° C., and the AFS cycle test (Accelerated Four Seasons Cycle Test) is used as an index of "storage stability." If the storage stability passes all of the conditions, the composition can be suitably used as a hair wash composition under various usage environments, such as low and high temperatures, 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 "feel in use." A hair wash composition that is easy to comb and smooth both during hair washing and rinsing can be suitably used as a hair wash composition.

[0011] 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, as component (A), a hydrophobic amphiphilic substance including 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 (A3) having an acyl group having 16 or less carbon atoms; 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 usually key components for forming a liquid crystal structure. However, the present inventors have found that by further incorporating a fatty alcohol having 16 or fewer carbon atoms and a fatty acid glyceryl having an acyl group having 16 or fewer carbon atoms into a fatty acid having 16 or fewer carbon atoms, stability is maintained while dispersibility upon dilution tends to be improved. This is thought to be because the liquid crystal structure changes from that of conventional compositions, resulting in a different form and maintaining stability, while the structure collapses upon dilution, improving dispersibility. As a result, it is presumed that the foam properties change, producing rich foam that is less likely to break, improving foam retention, and also improving smoothness upon washing and rinsing, thereby improving the ease of running fingers through the hair. The liquid crystal structure of the hair wash composition of the present invention is thought to preferably have a lamellar liquid crystal structure.

[0012] The hair wash composition of the present invention is applicable to hair, including fibers for head accessories as described above, and is particularly preferably applicable to hair. Fibers for head accessories may be either naturally-derived or synthetic, but naturally-derived fibers are 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 fibers artificially produced from animal hair, or proteins or polysaccharides such as keratin, collagen, casein, and proteins derived from soybeans, peanuts, corn, silk, etc., more preferably regenerated protein fibers made from keratin, collagen, casein, soybean protein, peanut protein, corn protein, silk protein (e.g., silk fibroin), etc., even more preferably regenerated protein fibers such as regenerated collagen fibers made from collagen, regenerated silk fibers made from silk fibroin, and even more preferably regenerated collagen fibers. Regenerated collagen fibers can be produced by known techniques. The composition of regenerated collagen fibers does not need to be 100% collagen, and they 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 production 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 of obtaining 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). Here, the term "main component" 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, still 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 above synthetic resins, the synthetic fibers may further contain various components such as flame retardants, flame retardant auxiliaries, light or heat stabilizers, fluorescent agents, antioxidants, antistatic agents, and ultraviolet absorbers, as long as 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, a fatty 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 fewer 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 a fatty acid having 16 or fewer carbon atoms is used here. 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 is preferably a linear hydrocarbon chain from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing. The hydrocarbon chain may be a saturated or unsaturated hydrocarbon chain, and is preferably a saturated hydrocarbon chain from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing.

[0016] 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, the number of carbon atoms in this component (A1) is preferably 8 or more, more preferably 10 or more, and from the viewpoints of improving foaming ability, foam retention, and smoothness during hair washing and rinsing, the number of carbon atoms in component (A1) is preferably 14 or less. 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 this 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 one of these can be used alone or two or more can be used in combination.

[0017] [Ingredient (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 viewpoints of improving storage stability, foaming properties, and smoothness during hair washing and rinsing. Component (A2) is considered to be a component that particularly contributes to improving the feel upon use 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, with a straight-chain aliphatic group being preferred from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing. 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, foaming ability, foam retention, and smoothness during hair washing and rinsing.

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

[0019] [Ingredient (A3)] The hair wash composition of the present invention contains, as component (A), a monoglyceryl fatty acid (A3) having an acyl group containing 16 or fewer carbon atoms, from the viewpoints of improving storage stability, foaming properties, and smoothness during hair washing and rinsing. The monoglyceryl fatty acid is a monoester of glycerin, and a compound having an acyl group containing 16 or fewer carbon atoms, derived from a fatty acid, is used here. 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 is preferably a linear hydrocarbon chain from the viewpoints of improving storage stability, foaming properties, foam retention, and smoothness during hair washing and rinsing. The hydrocarbon chain may be a saturated or unsaturated hydrocarbon chain, and is preferably a saturated hydrocarbon chain from the viewpoints of improving storage stability, foaming properties, foam retention, and smoothness during hair washing and rinsing.

[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 or more and 16 or less, more preferably 8 or more and 14 or less, and even more preferably 8 or more and 12 or less. Specific examples of mono-fatty acid glyceryl as component (A3) include glyceryl caprylate, glyceryl caprate, glyceryl laurate, and glyceryl myristate, and one of these can be used alone or two or more can be used in combination.

[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 or more and 16 or less, more preferably 8 or more and 14 or less, and even more preferably 8 or more and 12 or less. Specific examples of mono-fatty acid glyceryl as component (A3) include glyceryl caprylate, glyceryl caprate, glyceryl laurate, and glyceryl myristate, and one of these can be used alone or two or more can be used in combination.

[0022] In the present invention, component (A) contains all of the components (A1) to (A3). This allows for a hair wash composition with excellent storage stability, foaming properties, foam retention, and smoothness during hair washing and rinsing. To ensure that all of these properties are excellent, 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 still more preferably 10% by mass or less. From the same viewpoints as above, the total content of components (A1), (A2), and (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 the components (A1) to (A3) contained in the component (A) are as follows. From the viewpoints of improving 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. Also, 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, even more preferably 60% by mass or less. Also, 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, 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 from 0.5 to 3, more preferably from 1 to 3, and even more preferably from 1 to 2.5, from the viewpoints of improving storage stability, lathering ability, cleansing ability, and smoothness during hair washing and rinsing. 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, lathering 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, more preferably 0.4 to 3, from the viewpoints of improving storage stability, lathering 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, to the extent that 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), and a monoglyceryl fatty acid other than component (A3), specifically a fatty acid (A1') having more than 16 carbon atoms, a fatty alcohol (A2') having more than 16 carbon atoms, and 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, erucic acid, etc. Examples of component (A2') include stearyl alcohol, isostearyl alcohol, oleyl alcohol, linoleyl alcohol, arachidyl alcohol, behenyl alcohol, erucyl alcohol, etc. Examples of component (A3') include glyceryl stearate, glyceryl isostearate, glyceryl oleate, glyceryl linoleate, glyceryl arachidate, glyceryl behenate, glyceryl erucate, etc. In the present invention, from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing, the total content of components (A1) to (A3) [[(A1) + (A2) + (A3)] / [(A1) + (A2) + (A3) + (A')] × 100] of the total content of components (A1) to (A3) and the content of component (A') being 100% by mass 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.

[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). Component (B) contains the anionic surfactant (B1) as an essential component, and may also contain one or more surfactants selected from the group consisting of amphoteric surfactants (B2), nonionic surfactants (B3), and cationic surfactants (B4). That is, component (B1) may be used alone as component (B), or component (B1) may be used in combination with one or more components 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 sulfates include alkyl or alkenyl ether sulfates, and alkyl or alkenyl sulfates. Examples of sulfonates include alkylsulfonates, α-olefinsulfonates, internal olefinsulfonates, alkylbenzenesulfonates, alkylnaphthalenesulfonates, α-sulfosuccinates, and α-sulfofatty acid salts. Examples of carboxylates other than component (A1) include fatty acid salts having 17 or more carbon atoms, alkyl or alkenyl ether carboxylates, N-acylamino acid salts, etc. Examples of phosphates include phosphoric acid mono- or diester salts. As the anionic surfactant, one or more of these can be used. The hydrocarbon group such as an alkyl group or alkenyl group or the constituent fatty acid of the anionic surfactant preferably has 8 to 22 carbon atoms, more preferably 8 to 18 carbon atoms, and even more preferably 10 to 18 carbon atoms, from the viewpoints of improving storage stability, foaming ability, foam retention, and smoothness during hair washing and rinsing. Examples of counter ions of the anionic group of an 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 having 2 or 3 carbon atoms (for example, monoethanolammonium, diethanolammonium, triethanolammonium, triisopropanolammonium, etc.).

[0030] Among the above, the anionic surfactant preferably includes at least one selected from the group consisting of alkyl sulfates, alkyl ether sulfates, alkyl ether carboxylates, olefin sulfonates, and N-acylamino acid salts, from the viewpoints of improving storage stability, foaming properties, foam retention, and smoothness during shampooing and rinsing. 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. The alkyldimethylaminoacetic acid betaine preferably has an alkyl group having from 8 to 22 carbon atoms, more preferably from 10 to 20 carbon atoms, and specific examples include lauryldimethylaminoacetic acid betaine and stearyldimethylaminoacetic acid betaine. The fatty acid amidopropyl betaine preferably includes those having an acyl group 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 alkylhydroxysulfobetaine 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 alkylhydroxysulfobetaine include lauryl dimethyl sulfo(hydroxyethyl)betaine, lauryl dimethyl sulfo(hydroxypropyl)betaine [lauryl hydroxysulfobetaine], 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, and specific examples include sodium cocoamphoacetate. Examples of the phosphobetaine type include lauryl hydroxyphosphobetaine. From the viewpoint of improving storage stability, foaming ability, 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 fatty alcohol of component (A2) and the fatty acid monoglyceryl 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; polyoxyethylene 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 ability, 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)] The hair wash composition of the present invention may contain a cationic surfactant, if necessary. Specific examples of the cationic surfactant include tertiary amine compounds or salts thereof, and quaternary ammonium salts. Examples of cationic surfactants include mono- or di-long-chain alkyl quaternary ammonium salts represented by the following general formula: [ka] [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 -, and R 13 and R 14 represents a hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms, and Y - represents a chloride ion, a bromide ion, or a methosulfate ion. Specific examples of cationic surfactants that can be used include, from the viewpoints of improving storage stability, foaming properties, foam retention, and smoothness during hair washing and rinsing, 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 and cleansing properties and reducing irritation, the content of this 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, even more preferably 25% by mass or less. From the same viewpoints, the content 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, even more preferably 15% by mass or more and 25% 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 of the content of the anionic surfactant (B1) to the content of the component (B) [(B1) / (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 0.5 and at most 0.8.

[0038] <Water(C)> The hair wash composition of the present invention contains water (C) as an essential component. From the viewpoints of improving foaming properties, cleansing properties, and smoothness during hair washing and rinsing, as well as obtaining a stable lamellar liquid crystal structure, deionized water or distilled water is preferred as component (C). 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] The water content 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 55% by mass or more, and preferably 90% by mass or less, more preferably 85% by mass or less, and still more preferably 80% by mass or less, 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. From the same viewpoints, the water content is 30% by mass or more and 90% by mass or less, 40% by mass or more and 85% by mass or less, 50% by mass or more and 80% by mass or less, or 55% by mass or more and 80% by mass or less.

[0040] <Lamellar liquid crystal structure> The hair wash composition of the present invention is a composition that contains the above-mentioned components (A) to (C) and preferably 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 made of component (B) are layered with water interposed between them. 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 ratio 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, the composition is subjected to SAXS measurement and XRD measurement, and the angle formed by the repeating plane of the structural body contained in the composition and the X-ray is defined as θ (°), and in the scattering pattern obtained, the horizontal axis represents the scattering angle 2θ, and the vertical axis represents the intensity. If peak separation is unclear, the peaks are split using a Gaussian function, and the liquid crystal structure can be identified from the peak pattern. For example, if multiple peaks are observed at positions that are integer ratios in the SAXS dispersion pattern, it can be confirmed that a layered structure is formed. Furthermore, if there is no clear peak near 20° in the XRD dispersion pattern (the peak enclosed by the dashed line in Figure 2), it can be confirmed that the packing of the alkyl chains is in a liquid crystal state. Taking these factors into consideration, it can be determined that a lamellar liquid crystal structure is formed. 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 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 cationic guar gum, cationic tara gum, and cationic locust bean gum; cationic cellulose; cationic hydroxyalkyl celluloses such as cationic hydroxyethyl cellulose and cationic 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 di Examples of the polymer include diallyl quaternized ammonium salt polymers such as allyldimethylammonium chloride / acrylic acid / acrylamide copolymer; vinylimidazolium trichloride / vinylpyrrolidone copolymer; vinylpyrrolidone / alkylaminoalkyl (meth)acrylate copolymer; vinylpyrrolidone / alkylaminoalkyl (meth)acrylate / vinyl caprolactam copolymer; vinylpyrrolidone / (meth)acrylamidopropyl trimethylammonium chloride copolymer; alkylacrylamide / (meth)acrylate / alkylaminoalkylacrylamide / polyethylene glycol (meth)acrylate copolymer; adipic acid / dimethylaminohydroxypropyl ethylenetriamine copolymer; and cationic polymers described in JP-A-53-139734 and JP-A-60-36407, and 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)). Among 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 (all manufactured by The Dow Chemical Company), Poise C-60H, Poise C-150L (all 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 the quaternized dialkylaminoalkyl (meth)acrylate polymers, examples of commercially available N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymers include Polyquaternium-52: SOFCARE KG-101E and SOFCARE KG-101W-E (both 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 polymers include Polyquaternium-39: MERQUAT3331PR (manufactured by Lubrizol). The cationic polymers can 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% to 2.0% by mass, more preferably from 0.2% to 1.5% by mass, and even more preferably from 0.3% 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, and ethers, and one of these can be used alone or two or more can be used in combination. 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 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 compounds include perfluoropolyethers. Examples of the ethers include isostearyl glyceryl ether and polyoxypropylene butyl ether. Of these, from the viewpoint of improving smoothness during shampooing and rinsing, and imparting conditioning properties, component (D) preferably contains one or more selected from the group consisting of hydrocarbons, glycerides, and esters, and more preferably contains one or more 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. Also, 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. The hair wash composition of the present invention preferably has a lamellar liquid crystal structure as described above, and therefore, even when it contains an oily agent, separation or the like can be suppressed, and storage stability can be improved. Therefore, the oily agent content can be made larger than that of 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 method of use. 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 Brookfield 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 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 (C), and optionally components (D) to (E), and other components, using a known method and mixing them using a known stirring device, etc. In this case, it is preferable to prepare a mixture of water-soluble components and a mixture of oil-soluble components separately, dissolve the blended components uniformly, and then mix them to obtain the hair wash composition. To efficiently obtain a lamellar liquid crystal structure, it is preferable to prepare a hair wash composition, for example, 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 components (B), (C), and, if necessary, (D) and other water-soluble components, and a mixture of component (A), and, if necessary, (E) and other oil-soluble components, are separately prepared. Next, these mixtures are each heated to form a homogeneous mixed solution, and then gradually mixed while maintaining that temperature. After mixing, the mixture is cooled to room temperature (25°C) to prepare a hair wash 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 preferred lamellar liquid crystal structure can be efficiently prepared.

[0055] In relation to the above-described embodiments, the present invention further discloses the following hair cleansing composition or fabric cleansing composition for head accessories. [1] 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 (A3) having an acyl group having 16 or less carbon atoms; (B) a surfactant containing an anionic surfactant (B1), and (C) Water; wherein the total content of component (A1), component (A2), and component (A3) is 3 mass% or more. [2] The hair wash composition or the fabric wash composition for head accessories according to [1], wherein the component (A1) has 8 or more and 16 or less carbon atoms. [3] The hair wash composition or the fabric wash composition for head accessories according to [1] or [2], wherein the component (A2) has 10 or more and 16 or less carbon atoms. [4] The hair wash composition or the fabric wash composition for head accessories according to any one of [1] to [3], wherein the acyl group of the component (A3) has 8 or more and 12 or less carbon atoms. [5] The hair wash composition or the fabric wash composition for head accessories according to any one of [1] to [4], further comprising a cationic polymer (D). [6] The hair wash composition or the fabric wash composition for head accessories according to any one of [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 [1] to [6], wherein the total content of the components (A1), (A2), and (A3) is 3% by mass or more and 20% by mass or less. [8] The hair wash composition or the fabric wash composition for head accessories according to any one of [1] to [7], wherein the content of the component (A1) is 0.3% by mass or more and 10% by mass or less. [9] The hair wash composition or the fabric wash 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 wash composition for head accessories according to any one of [1] to [9], wherein the content of the component (A2) is from 0.3% by mass to 10% by mass.

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

[11] , wherein the content of the component (A3) is from 0.3% by mass to 10% by mass.

[13] The hair wash composition or the fabric wash 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 wash 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 of the content of the component (A2) to the content of the component (A1) [(A2) / (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 of the content of the component (A3) to the content of the component (A1) [(A3) / (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 of the content of the component (A3) to the content of the component (A2) [(A3) / (A2)] is 0.3 to 4.

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

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

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

[18] , wherein the content of the 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 of the content of the component (B1) to the content of the component (B) [(B1) / (B)] is 0.3 or more and 1.0 or less. [twenty one] 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 at least one selected from the group consisting of alkyl sulfate ester salts, alkyl ether sulfate ester salts, alkyl ether carboxylate salts, olefin sulfonates, and N-acylamino acid salts. [twenty two] The hair wash composition or the fabric wash composition for head accessories according to any one of [1] to

[21] , further comprising an amphoteric surfactant (B2) as the component (B). [twenty three] The hair wash composition or the fabric cleanser composition for head accessories according to any one of [1] to

[22] , wherein the mass ratio of the content of the component (A) to the content of the component (B) [(A) / (B)] is 0.1 or more and 1.0 or less. [twenty four] 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 members selected from the group consisting of cationized polygalactomannan, cationized hydroxyalkyl cellulose, quaternized dialkylaminoalkyl (meth)acrylate polymers, and diallyl quaternary ammonium salt polymers. [twenty five] The hair wash composition or the fiber wash 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 wash 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. [Example]

[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 which 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 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 evaluation 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 it, and subjecting it to a temperature cycle test. The temperature cycle test consisted of a 6-hour cycle with a temperature change of 40°C. The first cycle started from 0°C to 40°C, the second cycle from -1°C to 39°C, the third cycle from -2°C to 38°C, and so on, with the temperature changing by 1°C each time. After 168 hours, the minimum temperature reached -28°C, and from there the minimum temperature increased by 1°C each time toward 0°C. After two 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 is considered a pass. [Evaluation criteria] A: No separation B: Slight separation (less than 5% of the volume), but no problem C: Separation (more than 5% of volume)

[0060] <Foaming when washing hair> A 15 g 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 the volume was measured. In this specification, a sufficient amount of foam is considered to be acceptable if it is 180 mL or more.

[0061] <Feeling of use> (Smoothness after washing) A 15g tress of healthy hair (5cm wide x 30cm long) was lathered with 1.5g of each hair wash composition for 30 seconds (approximately 50 times), detangled, and combed 10 times. The average combing force for each time was recorded as the numerical value of smoothness during hair washing, and is shown in Tables 1 to 4. The combing force was measured by placing a 25 cm long hair bundle in a combing force measuring device (Utsunomiya Seiki Co., Ltd., "KOT-0303"), passing a comb (10 pins, 2 mm in diameter, spaced 4 mm apart in a straight line) through the top of the hair bundle, and measuring the load (gf) applied when the comb was passed through to the ends at 27.2 cm / sec. The load was measured at 250 points at equal intervals (1 mm intervals) on the 25 cm long hair bundle, and the maximum value was taken as the "combing force." This operation was performed 10 times, and the average value was used to evaluate the "combing force." The smaller the combing load, the smoother the combing, and a value of 600 gf or less is considered to be a pass mark for excellent smoothness during hair washing.

[0062] (Smoothness when rinsing) A 15g tress of healthy hair (5cm wide x 30cm long) was lathered with 1.5g of each example hair cleanser composition for 30 seconds (approximately 50 times), then rinsed with 40°C warm water for 20 seconds, detangled, and combed 10 times. The average combing force for each time was recorded as the numerical value for 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 shampooing. The smaller the combing load, the smoother the combing. During rinsing, a combing force of 850 gf or less is considered to be a pass mark for excellent smoothness.

[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, first, components (B) to (D) and other water-soluble components (lactic acid, citric acid, sodium hydroxide) were added to water, and the mixture was heated to 70°C and mixed to obtain a mixture of uniformly dissolved water-soluble components. Next, separately, components (A), (E), and other oil-soluble components (excluding fragrance) were mixed, heated to 60°C, and mixed to obtain a mixture of oil-soluble components. The temperature of each of these mixtures was adjusted to 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 volatile fragrance 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 (mass %) of each component shown in the table is the amount of active ingredient.

[0065] [Table 1]

[0066] [Table 2]

[0067] [Table 3]

[0068] [Table 4]

[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 Kagaku Co., Ltd. *11: Sunsoft 707BS, manufactured by Taiyo Kagaku Co., Ltd. *12: Sunsoft 760C, manufactured by Taiyo Kagaku Co., Ltd. *13: Sunsoft 750C, manufactured by Taiyo Kagaku Co., Ltd. *14: Emar 125A, manufactured by Kao Corporation *15: Amphitheater 20AB, manufactured by Kao Corporation *16: Amizol CME, manufactured by Kawaken Fine Chemicals Co., Ltd. *17: Soft Cat 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, SL *21: Sugar squalane, manufactured by Nippon Surfactant Kogyo Co., Ltd. *22: Fermented lactic acid 90%, manufactured by Purac Thailand Ltd. *23: Soypon SLTA, manufactured by Kawaken Fine Chemicals Co., Ltd. *24: Alanon ALE, manufactured by Kawaken Fine Chemicals 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: Kachisero 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] Tables 1 to 4 show that the hair wash compositions of the present invention (Examples 1 to 24) were excellent in storage stability, foaming ability, and smoothness during hair washing and rinsing. On the other hand, the comparative examples, which did not contain or contained only a small amount of the component (A), which is essential in the present invention, were insufficient in at least storage stability, foaming ability, and smoothness during hair washing and rinsing.

[0071] The scattering pattern obtained by SAXS analysis of 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 that were integer ratios (Figure 1), and since there was no clear peak in the vicinity of 20° in XRD (Figure 2), it was determined that the hair wash composition of Example 3 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. [Industrial Applicability]

[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.< / ph>

Claims

1. 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 (A3) having an acyl group having 16 or less carbon atoms; (B) a surfactant containing an anionic surfactant (B1), and (C) water; wherein the total content of component (A1), component (A2), and component (A3) is 3 mass% or more.

2. The hair wash composition or the fiber wash composition for head accessories according to claim 1, wherein the component (A1) has 8 or more and 16 or less carbon atoms.

3. The hair wash composition or the fiber wash composition for head accessories according to claim 1 or 2, wherein the component (A2) has 10 or more and 16 or less carbon atoms.

4. The hair wash composition or the fabric wash composition for head accessories according to claim 1 or 2, wherein the number of carbon atoms in the acyl group of the component (A3) is in the range of 8 to 12.

5. The hair wash composition or the fabric wash composition for head accessories according to claim 1 or 2, further comprising a cationic polymer (D).

6. The hair wash composition or the fabric wash composition for head accessories according to claim 1 or 2, further comprising an oily agent (E).

7. 3. The hair wash composition or the fiber cleanser composition for head accessories according to claim 1 or 2, wherein the total content of the components (A1), (A2), and (A3) is 3% by mass or more and 20% by mass or less.

8. The hair wash composition or the fabric cleanser composition for head accessories according to claim 1 or 2, further comprising a hydrophobic amphiphilic substance (A') other than components (A1) to (A3).

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

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

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

12. 3. The hair wash composition or the fiber cleanser composition for head accessories according to claim 1, wherein a 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.

Images