Shampoo composition

Abstract

To provide a shampoo composition containing acyl aspartate or a salt thereof, the shampoo composition having superior stability over time as well as superior foamability and foam quality.SOLUTION: A shampoo composition comprises the following components (A) to (D): (A) acyl aspartate or a salt thereof, (B) two or more selected from acyl glutamate or a salt thereof, acyl methylalanine or a salt thereof, and acyl methyltaurate or a salt thereof, (C) an alcohol having an IOB value (inorganic / organic property ratio) of 3.4 or less, and (D) a pH regulator, and has a pH of 4.0 to 6.0 at 25°C.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a shampoo composition.

Background Art

[0002] Conventionally, in shampoo compositions for washing scalp hair, in order to obtain foaming properties as a detergent and a good feeling of use after use, various types of detergents have been studied, including anionic surfactants and amphoteric surfactants. So far, anionic surfactants of the sulfuric acid type or olefin sulfonic acid type having high foaming properties, detergency, and appropriate viscosity have been widely used. However, due to the increasing interest in scalp and skin care, the development of shampoo compositions that do not use these surfactants has also been promoted. On the other hand, due to the diversification of consumer preferences, regarding the appearance of shampoo compositions, the preference for a transparent appearance rather than the conventionally widely used pearl-like appearance has increased significantly, and there is also a strong demand for technologies for aesthetics that maintain transparency in a wide temperature range. For example, Patent Document 1 discloses a technology related to a transparent shampoo composition that uses acylmethyl taurine salt as an anionic surfactant and cationized cellulose with a specific molecular weight, and has excellent stability over time at low temperatures. Furthermore, in recent years, the use of acyl amino acids and their salts, which have relatively low degreasing effects and environmental loads, has also been studied. For example, Patent Document 2 discloses a technology related to a shampoo that uses acyl amino acids or their salts and has good foam quality and can improve the feel of hair after washing. Furthermore, Patent Document 3 discloses a technology related to a thickening composition that uses an anionic surfactant of N-long-chain acyl acidic amino and / or its salt and has moderate thickening performance and excellent usability. Hair is composed of keratin, i.e., a sulfur-containing fibrous protein. The isoelectric point of hair is said to be in the weakly acidic range of pH 4.0 to 5.5. When the pH of the hair treatment agent to be applied is acidic, the cuticle of swollen (open) hair can be easily closed (see, for example, Patent Document 4). Therefore, a hair cleansing composition having a weakly acidic pH is expected to improve the hair treatment effect.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when the pH is adjusted to be weakly acidic in a transparent shampoo, cloudiness may occur. Particularly when a high amount of acyl aspartate is formulated or when the pH is adjusted to be weakly acidic, cloudiness and precipitation and solidification of the shampoo may occur at low temperatures. However, the techniques of Patent Document 2 and Patent Document 3 do not mention the occurrence of clouding and solidification over time in a shampoo composition containing an acyl amino acid or its salt, which is an amino acid-based surfactant, and the technique of Patent Document 1 does not mention the good foam quality. Therefore, an object of the present invention is to provide a shampoo composition containing acyl aspartic acid or its salt, which has excellent stability over time. Another object of the present invention is to provide a shampoo composition that is also excellent in foaming and foam quality. [Means for Solving the Problem]

[0005] As a result of intensive studies, the present inventors have found that by combining an acyl amino acid, acyl aspartic acid or a salt thereof, with two or more surfactants selected from acyl glutamic acid or a salt thereof, acyl methyl alanine or a salt thereof, and acyl methyl taurine or a salt thereof, and blending a specific alcohol, a shampoo composition can be obtained which has excellent stability over time at low temperatures even in the weakly acidic range and is also excellent in foaming and foam quality.

[0006] That is, the present invention is as described below. [1] The following components (A) to (D); (A) Acyl aspartic acid or a salt thereof (B) Two or more selected from acyl glutamic acid or a salt thereof, acyl methyl alanine or a salt thereof, and acyl methyl taurine or a salt thereof (C) An alcohol having an IOB value (inorganic value / organic value) of 3.4 or less (D) A pH adjuster The present invention provides a shampoo composition containing the above components and having a pH of 4.0 to 6.0 at 25°C. [2] The shampoo composition according to [1], wherein the component (B) contains (B1) acyl glutamic acid or a salt thereof, (B2) acyl methyl alanine or a salt thereof, and (B3) acyl methyl taurine or a salt thereof. [3] The shampoo composition according to [1] or [2], wherein the mass ratio of the component (A) to the total content of the component (A) and the component (B), (A) / {(A)+(B)}, is 0.1 to 0.8. [4] The shampoo composition according to [1] or [2], further containing component (E) polyoxyethylene hydrogenated castor oil isostearate. [5] Provided is a shampoo composition which is transparent or semi-transparent as described in [1] or [2].

Advantages of the Invention

[0007] According to the present invention, it is possible to provide a shampoo composition having excellent stability over time, particularly excellent stability over time at low temperatures. Furthermore, it is possible to provide a shampoo composition excellent in foaming property and foam quality.

Modes for Carrying Out the Invention

[0008] Preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the following preferred embodiments and can be freely changed within the scope of the present invention. In the present specification, percentages are by mass unless otherwise specified. Also, in the present specification, when representing a numerical range using "~", the range includes the numerical values at both ends.

[0009] Component (A) acyl aspartic acid or a salt thereof used in the present invention is a condensate of a fatty acid and aspartic acid, or a salt thereof, and is one type of amino acid surfactant. The acyl group in the acyl aspartic acid of component (A) is derived from a fatty acid, and the carbon number of this fatty acid is not particularly limited, but from the viewpoints of good foaming property and good foam quality, those having 10 to 16 carbon atoms are preferred, and those having 12 to 14 carbon atoms are more preferred.

[0010] These salts are not particularly limited, but examples include metal salts such as sodium salt, potassium salt, lithium salt, magnesium salt, calcium salt; ammonium salts such as ammonium salt, alkylammonium salt; amine salts such as monoethanolamine salt, diethanolamine salt, triethanolamine salt, aminomethylpropanol salt; basic amino acid salts such as lysine salt, arginine salt, etc. From the viewpoints of good foaming property and good foam quality, sodium salt, potassium salt, and triethanolamine salt are preferred, and sodium salt and potassium salt are more preferred.

[0011] Specific examples of component (A) used in the present invention include sodium lauroyl aspartate, sodium lauryl aspartate, potassium lauryl aspartate, TEA lauryl aspartate, sodium myristoyl aspartate, potassium myristoyl aspartate, TEA myristoyl aspartate, 2TEA palmitoyl aspartate, etc. From the perspective of easy availability, more preferably, they are sodium lauroyl aspartate and potassium myristoyl aspartate. As commercially available products, as potassium lauryl aspartate, there is Nikkol (registered trademark) ASP-12KL (manufactured by Shin Nippon Rika Co., Ltd.), as sodium lauroyl aspartate, there is Aminopher FLDS-L (manufactured by Asahi Kasei Finechem Co., Ltd.), and as potassium myristoyl aspartate, there is Nikkol (registered trademark) ASP-14KL (manufactured by Shin Nippon Rika Co., Ltd.), etc.

[0012] The content of component (A) used in the present invention is not particularly limited. However, with respect to the total amount of the shampoo composition, the lower limit is preferably 0.5% by mass (hereinafter simply abbreviated as %), more preferably 1% or more, and even more preferably 2% or more. The upper limit is preferably 7% or less, more preferably 6% or less, and even more preferably 5% or less. The range is preferably 0.5 to 7%, more preferably 1 to 6%, and even more preferably 2 to 5%. Being within this range is more preferable in terms of excellent stability over time at low temperatures and good foam quality.

[0013] Two or more selected from component (B) (B1) acylglutamic acid or its salt, (B2) acylmethylalanine or its salt, and (B3) acylmethyltaurine or its salt used in the present invention are condensates of fatty acids with glutamic acid, N-methyl-β-alanine, or N-methyltaurine, or their salts, and are classified as amino acid-based surfactants. The acyl groups in acyl glutamic acid, acyl methyl alanine, and acyl methyl taurine of component (B) are derived from fatty acids. The number of carbon atoms in this fatty acid is not particularly limited, but from the viewpoint of excellent foaming property and foam quality, those having 8 to 22 carbon atoms are preferred, those having 10 to 18 carbon atoms are more preferred, and those having 10 to 16 carbon atoms are even more preferred. Also, as the fatty acid, a linear or branched one derived from a saturated or unsaturated fatty acid can be used. More specifically, for example, as the fatty acid, caprylic acid, capric acid, lauric acid, myristic acid, stearic acid, isostearic acid, palmitic acid, oleic acid, linoleic acid, behenic acid, coconut oil fatty acid, palm fatty acid, etc. may be mentioned. Among these, one kind may be used, or two or more kinds selected from the above group may be mixed and used. Among them, at least one selected from the group consisting of lauric acid, myristic acid, and coconut oil fatty acid is more preferred.

[0014] These salts are not particularly limited, but for example, metal salts such as sodium salt, potassium salt, lithium salt, magnesium salt, calcium salt, etc.; ammonium salts such as ammonium salt, alkylammonium salt, etc.; amine salts such as monoethanolamine salt, diethanolamine salt, triethanolamine salt, aminomethylpropanol salt, etc.; basic amino acid salts such as lysine salt, arginine salt, etc. may be mentioned. From the viewpoint of stability over time, sodium salt, potassium salt, and triethanolamine salt are preferred, and sodium salt and triethanolamine salt are more preferred.

[0015] Specific examples of component (B) used in the present invention include (B1) acyl glutamic acid or its salt such as sodium lauroyl glutamate, sodium cocooyl glutamate, TEA cocooyl glutamate, etc.; (B2) acyl methyl alanine or its salt such as TEA lauroyl methyl alanine, sodium myristoyl methyl alanine, sodium cocooyl methyl alanine, etc.; (B3) acyl methyl taurine or its salt such as sodium oleoyl methyl taurine, sodium myristoyl methyl taurine, sodium cocooyl methyl taurine, sodium cocooyl methyl taurine taurine, etc. Two or more of these are contained. From the viewpoint of good foam quality, it is preferable to use a combination of three types: (B1) acylglutamic acid or its salt, (B2) acylmethylalanine or its salt, and (B3) acylmethyltaurine or its salt. Examples of commercially available products include, for sodium lauroyl glutamate, Plantapon (registered trademark) Amino SLG-P (manufactured by BASF), etc. For sodium cocoyl glutamate, there is Amino Surfactant (registered trademark) ACDS-L (manufactured by Asahi Kasei Fine Chemicals), for TEA cocoyl glutamate, there is MIAMI CT130 (manufactured by Miwon Commercial), Amino Surfactant (registered trademark) ACMT-L (manufactured by Asahi Kasei Fine Chemicals), etc. For TEA lauroylmethylalanine, there is Softilt AT-L (manufactured by NOF Corporation), for sodium myristoylmethylalanine, there is Alanone (registered trademark) AME (manufactured by Kawaken Fine Chemicals), for sodium cocoylmethylalanine, there is Alanone (registered trademark) ACE (manufactured by Kawaken Fine Chemicals), etc. For sodium oleoylmethyltaurine, there is METAUPON OMT 40 (manufactured by Vantage Specialty Ingredients), for sodium cocoylmethyltaurine, there is Diaupon K-SF (manufactured by NOF Corporation), for sodium cocoylmethyltaurine taurine, there is Diaupon K-SG (manufactured by NOF Corporation), etc.

[0016] The content of component (B) used in the present invention is not particularly limited, but with respect to the total amount of the shampoo composition, as the lower limit, 2% or more is preferable, 4% or more is more preferable, and 6% or more is even more preferable. As the upper limit, 14% or less is preferable, 12% or less is more preferable, and 10% or less is even more preferable. As the range, 2 to 14% is preferable, 4 to 12% is more preferable, and 6 to 10% is even more preferable. Being within this range is more preferable in terms of excellent stability over time at low temperatures and good foam quality.

[0017] The mass ratio of (B1) to (B2) that can be contained in component (B) used in the present invention, (B1) / (B2), is not particularly limited. However, as the lower limit, 0.2 or more is preferable, 0.5 or more is more preferable, and 0.8 or more is even more preferable. As the upper limit, 1.8 or less is preferable, 1.5 or less is more preferable, and 1.2 or less is even more preferable. As the range, 0.2 to 1.8 is preferable, 0.5 to 1.5 is more preferable, and 0.8 to 1.2 is even more preferable. Being within this range is more preferable in terms of excellent stability over time at low temperatures and good foam quality.

[0018] The mass content ratio of component (A) to the total of component (A) and component (B) used in the present invention, (A) / [(A)+(B)], is not particularly limited. However, as the lower limit, it is 0.1 or more, preferably 0.15 or more, and more preferably 0.2 or more. As the upper limit, it is 0.8 or less, preferably 0.6 or less, and more preferably 0.4 or less. As the range, it is 0.1 to 0.8, more preferably 0.15 to 0.6, and even more preferably 0.2 to 0.4. Being within this range is more preferable in terms of stability over time at low temperatures.

[0019] Component (C) used in the present invention is an alcohol having an IOB value (inorganic value / organic value) of 3.4 or less. The IOB value is a value determined based on the organic concept diagram (Reference 1: Hajime Fujita, Prediction of Organic Compounds and Organic Concept Diagram, Chemistry Field VOL.11, No.10 (1957) 719-715). More specifically, in this organic concept diagram, regarding the physicochemical properties of a compound, the degree of physical properties mainly due to the Van der Waals force is defined as "organic property", and the degree of physical properties mainly due to the electrical affinity is defined as "inorganic property" and expressed as a value. The IOB value is an index indicating the balance between inorganic and organic properties, and is expressed as IOB value = inorganic value / organic value. A compound with a larger value of this kind can be said to be a compound showing hydrophilic properties and high polarity. Examples of alcohols having an IOB value of 3.4 or less include ethanol (IOB value = 2.5), propylene glycol (IOB value = 3.3), dipropylene glycol (IOB value = 1.8), tripropylene glycol (IOB value = 1.9), 1,3-butylene glycol (IOB value = 2.5), 1,2-pentanediol (IOB value = 2.0), PEG-8 (MW400) (IOB value = 2.3), etc.

[0020] Component (C) used in the present invention is not particularly limited, but from the viewpoint of stability over time at low temperatures, monohydric or dihydric alcohols such as ethanol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, 1,2-pentanediol, etc. are preferred, and ethanol, dipropylene glycol, and propylene glycol are more preferred. In addition, a combined use of monohydric alcohol and dihydric alcohol is particularly preferred.

[0021] The content of component (C) used in the present invention is not particularly limited. However, with respect to the total amount of the shampoo composition, the lower limit is preferably 0.1% or more, more preferably 0.5% or more, and still more preferably 1% or more. The upper limit is preferably 7% or less, more preferably 5% or less, and still more preferably 3% or less. The range is preferably 0.1 to 7%, more preferably 0.5 to 5%, and still more preferably 1 to 3%. Being within this range is preferable from the viewpoints of stability over time at low temperatures and good foaming properties.

[0022] Examples of the pH adjuster of component (D) used in the present invention include alkaline agents and acidic agents. As the alkaline agent, one or more selected from sodium hydroxide, potassium hydroxide, calcium hydroxide, potassium carbonate, sodium hydrogen carbonate, sodium monohydrogen phosphate, sodium dihydrogen phosphate, triethanolamine, etc. can be used. In this case, examples of the alkaline agent include sodium hydroxide, potassium hydroxide, ammonia, triethanolamine, monoethanolamine, 2-amino-2-methyl-1-propanol, and particularly sodium monohydrogen phosphate and sodium dihydrogen phosphate are suitable. As the acidic agent, one or more selected from citric acid, lactic acid, gluconic acid, succinic acid, malic acid, phosphoric acid, pyrrolidonecarboxylic acid, salicylic acid, benzoic acid or their salts, etc. can be used. Among these, from the viewpoint of stability over time at low temperatures, α-hydroxy acid or its salt is preferable, and citric acid or its salt is more preferable.

[0023] The content of component (D) used in the present invention is not particularly limited, and it can be preferably used as long as it can adjust the pH of the shampoo composition within the range of 4.0 to 6.0.

[0024] Furthermore, the present invention can contain polyoxyethylene hydrogenated castor oil isostearate as component (E). Polyoxyethylene hydrogenated castor oil isostearate is an ester compound of polyoxyethylene hydrogenated castor oil, obtained by addition polymerization of ethylene oxide to hydrogenated castor oil, and isostearic acid, and one or more of these can be used. Specific examples include polyoxyethylene (20) hydrogenated castor oil isostearate, polyoxyethylene (50) hydrogenated castor oil isostearate, etc. The average number of moles of ethylene oxide added to polyoxyethylene hydrogenated castor oil isostearate is not particularly limited, but from the viewpoint of stability over time, the average number of moles of ethylene oxide added is preferably 20 to 60, more preferably 30 to 50. Commercially available products include Uniox HC-20MIS (manufactured by NOF Corporation), EMALEX RWIS-150 (manufactured by Nippon Emulsion Co., Ltd.), etc.

[0025] The content of component (E) used in the present invention is not particularly limited, but as the lower limit, it is preferably 0.05% or more, more preferably 0.1% or more, and even more preferably 0.3% or more, based on the total amount of the shampoo composition. As the upper limit, it is preferably 2% or less, more preferably 1% or less, and even more preferably 0.6% or less. The range is preferably 0.05 to 2%, more preferably 0.1 to 1%, and even more preferably 0.3 to 0.6%. Being within this range is more preferable from the viewpoint of stability over time at low temperatures.

[0026] Furthermore, the present invention can contain sorbitol. Sorbitol is a type of sugar alcohol obtained by reducing glucose and converting the aldehyde group to a hydroxy group. Commercially available products include Sorbitol SP (manufactured by Bussan Food Science Co., Ltd.), etc.

[0027] The content of sorbitol used in the present invention is not particularly limited. However, with respect to the total amount of the shampoo composition, the lower limit is preferably 0.01% or more, more preferably 0.1% or more, and even more preferably 0.5% or more. The upper limit is preferably 5% or less, more preferably 3% or less, and even more preferably 1% or less. The range is preferably 0.01 - 5%, more preferably 0.1 - 3%, and even more preferably 0.5 - 1%. Being within this range is more preferable from the viewpoint of good foam quality.

[0028] In the shampoo composition of the present invention, from the viewpoints such as low degreasing effect on the skin and hair, it is preferably substantially free of sulfuric acid-based surfactants and / or olefin sulfonic acid-based surfactants, and more preferably substantially free of sulfuric acid-based surfactants and olefin sulfonic acid-based surfactants. Here, being substantially free means that the content in the composition is 1% or less, preferably 0.5% or less, more preferably 0.1% or less, and even more preferably 0% (not contained).

[0029] In addition to the above components, the shampoo composition of the present invention can contain components used in ordinary shampoo compositions, namely water, surfactants other than component (A), (B), (E), oils, gelling agents, powders, water-soluble alcohols other than component (C), water-soluble polymers, film-forming agents, resins, welding compounds, humectants, antibacterial agents, fragrances, deodorants, salts, chelating agents, ultraviolet absorbers, cooling agents, plant extracts, vitamins, beauty components, etc., within a qualitative and quantitative range that does not impair the effects of the present invention.

[0030] The water is not particularly limited, and examples include purified water, distilled water, ion-exchanged water, tap water, hot spring water, deep sea water, etc. In the present invention, the content of water in the shampoo composition is not particularly limited, but is preferably 20 - 80%, and more preferably 30 - 70%.

[0031] As surfactants other than components (A), (B), and (E), as cationic surfactants, amine salts such as alkylamine salts, polyamines, and amino alcohol fatty acid derivatives, alkyl quaternary ammonium salts, aromatic quaternary ammonium salts, pyridinium salts, imidazolium salts, etc., include stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, cetyltrimethylammonium chloride, distearyldimethylammonium chloride, dibehenyldimethylammonium chloride, enka dicetyldimethylammonium chloride, stearyldimethylbenzylammonium chloride, dilauryl dimethylammonium chloride, dipolyoxyethylene (15EO) coconut oil alkylmethylammonium chloride, dipolyoxyethylene (4EO) lauryl ether dimethylammonium chloride, dicocoylethylhydroxyethylmonium sulfate, distearoylethylhydroxyethylmonium methosulfate, distearoylethylhydroxyethylmonium methosulfate, dipalmitoylethylhydroxyethylmonium methosulfate, and palmitamidopropyltrimonium chloride.Examples of nonionic surfactants include sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyethylene glycol fatty acid esters, sucrose fatty acid esters, polyoxyethylene alkyl ethers, polyoxypropylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene phytostanol ether, polyoxyethylene phytosterol ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, polyoxyalkylene-modified organopolysiloxanes, polyoxyalkylene-alkyl co-modified organopolysiloxanes, lauric acid diethanolamide, coconut oil fatty acid diethanolamide, coconut oil fatty acid monoethanolamide, polyoxyethylene coconut oil fatty acid monoethanolamide, lauric acid monoisopropanolamide, coconut oil fatty acid monoisopropanolamide, polyoxypropylene coconut oil fatty acid monoisopropanolamide, alkanolamides, sugar ethers, sugar amides, and the like.

[0032] As the oil agent, oily components such as higher alcohols, hydrocarbon oils, ester oils, fats and oils, and silicones can be used. For example, higher alcohols such as lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, hexadecyl alcohol, oleyl alcohol, isostearyl alcohol, hexyl dodecanol, octyl dodecanol, cetostearyl alcohol, 2-decyltetradecynol, cholesterol, phytosterol, sitosterol, lanosterol, monostearyl glycerin ether (batyl alcohol), etc., hydrocarbons such as ozokerite, squalane, squalene, ceresin, paraffin, paraffin wax, liquid paraffin, pristane, polyisobutylene, microcrystalline wax, petrolatum, etc., ester oils such as diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, N-alkyl glycol monoisostearate, isocetyl isostearate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl octanoate, octyldodecyl gum ester, oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol dicaprate, triethyl citrate, 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl lactate, myristyl lactate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, cholesteryl 12-hydroxystearate, dipentaerythritol fatty acid ester, isopropyl myristate, octyldodecyl myristate, 2-hexyldecyl myristate, myristyl myristate, hexyl dodecyl dimethyloctanoate, ethyl laurate, hexyl laurate, diisostearyl malate, etc., waxes such as beeswax, carnauba wax, candelilla wax, spermaceti wax, etc., and fats and oils such as palm oil, palm kernel oil, olive oil, safflower oil,Vegetable oils represented by soybean oil, cottonseed oil, etc., animal oils such as beef tallow, beef foot tallow, beef bone fat, hydrogenated beef tallow, hydrogenated oil, turtle oil, lard, horse fat, mink oil, liver oil, egg yolk oil, etc., lanolin, liquid lanolin, reduced lanolin, lanolin alcohol, hard lanolin, lanolin acetate, lanolin fatty acid isopropyl, etc. lanolin derivatives, low-polymerization-degree dimethylpolysiloxane, high-polymerization-degree dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, polyether-modified polysiloxane, polyoxyalkylene·alkylmethylpolysiloxane·methylpolysiloxane copolymer, alkoxy-modified polysiloxane, alkyl-modified polysiloxane, cross-linked organopolysiloxane, fluorine-modified polysiloxane, amino-modified polysiloxane, glycerin-modified polysiloxane, higher alkoxy-modified silicone, higher fatty acid-modified silicone, silicone resin, silicone rubber, silicone resin, etc. silicone compounds, etc. can be mentioned.,

[0033] Examples of the gelling agent include dextrin fatty acid esters such as dextrin palmitate, dextrin stearate, dextrin 2-ethylhexanoate palmitate, etc., sucrose fatty acid esters such as sucrose palmitate, sucrose stearate, etc., benzylidene derivatives of sorbitol such as monobenzylidene sorbitol, dibenzylidene sorbitol, etc., organic modified clay minerals such as dimethylbenzyldodecylammonium montmorillonite clay, dimethyldioctadecylammonium montmorillonite clay, etc.

[0034] As the powder, any powder can be used as long as it is used in ordinary cosmetics, regardless of its shape (spherical, needle-shaped, plate-shaped, etc.), particle size (smoky, fine particles, pigment grade, etc.), or particle structure (porous, non-porous, etc.). For example, as inorganic powders, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, talc, synthetic mica, mica, kaolin, sericite, muscovite, synthetic mica, phlogopite, red mica, biotite, lithium mica, silicic acid, anhydrous silicic acid, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, metal tungstate, hydroxyapatite, vermiculite, hydrillaite, montmorillonite, zeolite, ceramic powder, dibasic calcium phosphate, alumina, aluminum hydroxide, boron nitride, boron nitride, etc. As organic powders, polyamide powder, polyester powder, polyethylene powder, polypropylene powder, polystyrene powder, polyurethane powder, benzoguanamine powder, polymethylbenzoguanamine powder, tetrafluoroethylene powder, polymethylmethacrylate powder, cellulose powder, silk powder, nylon powder, 12 nylon powder, 6 nylon powder, styrene-acrylic acid copolymer powder, divinylbenzene-styrene copolymer powder, vinyl resin powder, urea resin powder, phenol resin powder, fluororesin powder, silicone resin powder, acrylic resin powder, melamine resin powder, epoxy resin powder, polycarbonate resin powder, microcrystalline fiber powder, lauroyl lysine, etc. As colored pigments, inorganic red pigments such as iron oxide, iron hydroxide, and iron titanate, inorganic brown pigments such as γ-iron oxide, inorganic yellow pigments such as yellow iron oxide and loess, inorganic black pigments such as black iron oxide and carbon black, inorganic purple pigments such as manganese violet and cobalt violet, inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide, and cobalt titanate, inorganic blue pigments such as ultramarine and ultramarine blue, lake-formulated tar-based dyes, lake-formulated natural dyes, and composite powders obtained by compounding these powders, etc. As pearl pigments, titanium oxide-coated mica, titanium oxide-coated mica, bismuth oxychloride,As metal powder pigments, there are titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, fish scale foil, titanium oxide-coated colored mica, etc.; as metal powders, there are aluminum powder, copper powder, stainless steel powder, etc.; as tar pigments, there are Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 22, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 505, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 204, Yellow No. 401, Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 404, Green No. 3, Green No. 201, Green No. 204, Green No. 205, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 206, Orange No. 207, etc.; as natural pigments, there are powders selected from carminic acid, laccaic acid, carthamin, brazilein, crocin, etc., and those obtained by compounding these powders, or powders surface-treated with an oil agent, silicone, or fluorine compound, etc.

[0035] As water-soluble alcohols, there are lower alcohols such as those with an IOB value exceeding 3.4, polyhydric alcohols such as glycerin (IOB value = 5.0), diglycerin (IOB value = 3.5), diethylene glycol (IOB value = 3.44), sorbitol (IOB value = 5.0), maltitol (IOB value = 4.4), etc.

[0036] Examples of water-soluble polymers include mucopolysaccharides and their salts selected from chondroitin sulfate, hyaluronic acid, mucin, dermatan sulfate, heparin, and keratan sulfate, plant-based polymers such as gum arabic, tragacanth, galactan, carob gum, guar gum, karaya gum, carrageenan, pectin, agar, quince seed, algocolloid, trant gum, locust bean gum, galactomannan, etc., microbial-based polymers such as xanthan gum, dextran, succinoglucan, pullulan, etc., starch-based polymers such as starch, carboxymethyl starch, methylhydroxypropyl starch, etc., cellulose-based polymers such as methyl cellulose, ethyl cellulose, methylhydroxypropyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, nitrocellulose, sodium cellulose sulfate, sodium carboxymethyl cellulose, crystalline cellulose, cellulose, etc., alginic acid-based polymers such as sodium alginate, propylene glycol alginate, etc., vinyl-based polymers such as polyvinyl methyl ether, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, etc., polyoxyethylene-based polymers, polyoxyethylene-polyoxypropylene copolymer-based polymers, inorganic water-soluble polymers such as sodium polyacrylate, polyethyl acrylate, polyethyleneimine, bentonite, laponite, hectorite, etc. Examples of anionic polymers commonly used as setting agents include, for example, acrylic acid-ethyl acrylate-N-tert-butylacrylamide copolymer, acrylic resin alkanolamine, vinyl methyl ether-ethyl maleate copolymer, vinyl methyl ether-butyl maleate copolymer, vinyl acetate-crotonic acid copolymer, etc. Examples of amphoteric polymers include N-methacryloylethyl N,N-dimethylammonium-α-N-methylcarboxybetaine-alkyl methacrylate copolymer, hydroxypropyl acrylate-butylaminoethyl methacrylate-octylacrylamide copolymer, acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, dimethyldiallylammonium chloride-acrylic acid copolymer, etc.Examples of the cationic polymer include vinylpyrrolidone·N,N-dimethylaminoethyl methacrylate copolymer diethyl sulfate, diallyldimethylammonium chloride·hydroxyethyl cellulose, glycidyltrimethylammonium chloride·hydroxyethyl cellulose, diallyldimethylammonium chloride polymer, diallyldimethylammonium chloride·acrylamide copolymer, and the like. Examples of the nonionic polymer include polyvinylpyrrolidone, vinylpyrrolidone·vinyl acetate copolymer, polyvinyl alcohol, polyurethane, and the like.

[0037] Examples of the antibacterial agent include benzoic acid, sodium benzoate, salicylic acid, phenol, sorbic acid, potassium sorbate, parachlorometacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, photosensitizer, zinc bis(2-pyridylthio-1-oxide), isopropylmethylphenol, glyceryl caprylate, and the like. Examples of the preservative include paraoxybenzoic acid ester, phenoxyethanol, and the like.

[0038] Examples of the vitamins include vitamins A and its derivatives, vitamins B and its derivatives, vitamins C and its derivatives, vitamins E and its derivatives, vitamin Fs such as linolenic acid and its derivatives, vitamin Ks such as phylloquinone, menaquinone, menadione, menadiol, vitamin Ps such as eriocitrin, hesperidin, biotin, carthinin, ferulic acid, and the like.

[0039] The pH of the shampoo composition of the present invention is 4.0 to 6.0 at 25°C. Within this range, it is excellent in the stability over time at low temperatures and the foaming property, and a pH of 5.0 to 6.0 is more preferable in terms of these effects. In the present application, the pH measurement was performed at 25°C, and a glass electrode type hydrogen ion concentration meter (manufactured by Horiba, Ltd.) was used for the measurement.

[0040] The properties of the shampoo composition of the present invention are not particularly limited, and examples include liquid, gel, emulsion, cream, semi-solid, and solid forms. In the present invention, it is preferably in a liquid state in order to preferably exhibit effects such as good foaming and good foam quality. Here, "liquid" means a state having fluidity at 25°C. Specifically, at 25°C, the viscosity measured using a Brookfield type rotational viscometer is 20,000 mPa·s or less, preferably 10,000 mPa·s or less, more preferably 5,000 mPa·s or less.

[0041] Note that in this embodiment, "transparent to semi-transparent" means that after the shampoo composition is left standing at 25°C for 24 hours, the transmittance at 500 nm is measured, and the obtained transmittance is greater than 90%. Furthermore, this transmittance is preferably 95% or more. The transmittance in this embodiment is a value measured using an ultraviolet-visible spectrophotometer (UV2500PC, manufactured by Shimadzu Corporation), with purified water on the reference side.

[0042] Note that when the shampoo composition of this embodiment is made transparent to semi-transparent, even when it contains powder substances such as granules and pearl agents, or colorants, etc., the transparency of the shampoo composition itself contributes to further improving the visual effect of the separately contained powder substances, etc.

[0043] Also, the dosage form of the shampoo composition is not particularly limited, and examples include aqueous, solubilized aqueous, solubilized type, oil-in-water type, water-in-oil type, water-in-oil-in-water type, oil-in-water-in-oil type, multi-layer type, etc., and it is preferably aqueous or solubilized type.

[0044] The shampoo composition of the present invention can be applied to various containers such as bottles, bottles with dispensers, etc., without particular limitation, according to its intended use, method, usage environment, etc.

[0045] (Manufacturing method) The shampoo composition of this embodiment is not particularly limited and is prepared by a conventional method. For example, it can be obtained by heating and mixing components (A) to (D).

[0046] In addition, the present invention can also adopt the following configurations. 〔1〕 The following components (A) to (C); (A) Acyl aspartic acid or its salt (B) Two or more selected from acyl glutamic acid or its salt, acyl methyl alanine or its salt, and acyl methyl taurine or its salt (C) Alcohol with an IOB value (inorganic value / organic value) of 3.4 or less (D) pH adjuster A shampoo composition containing the above components and having a pH of 4.0 to 6.0 at 25°C. 〔2〕 The shampoo composition according to [1], wherein the component (B) contains (B1) acyl glutamic acid or its salt, (B2) acyl methyl alanine or its salt, and (B3) acyl methyl taurine or its salt. 〔3〕 The shampoo composition according to [1] or [2], wherein the mass ratio of the component (A) to the total content of the component (A) and the component (B), (A) / {(A)+(B)}, is 0.1 to 0.8. 〔4〕 The shampoo composition according to any one of [1] to [3], further containing component (E) polyoxyethylene hydrogenated castor oil isostearate. 〔5〕 The shampoo composition according to any one of [1] to [4], which is transparent to translucent.

Examples

[0047] The effects of the present invention will be described using the following examples and comparative examples. However, the technical scope of the present invention is not limited only to the following examples. Also, unless otherwise specified, each operation is performed at room temperature (25°C).

[0048] Examples 1 to 24 and Comparative Examples 1 to 8: Shampoo Composition Shampoo compositions having the formulations shown in Tables 1 and 2 below were prepared and evaluated for (a) stability over time (5°C / 1 month), (b) good foaming property, and (c) good foam quality by the following evaluation methods. The results are also shown in Tables 1 to 3.

[0049] [Table 1]

[0050] [Table 2]

[0051] [Table 3] Note 1: Aminoformer FLDS-L (manufactured by Asahi Kasei Fine Chemicals Co., Ltd.) Note 2: N-Ge Bon ASP-14KL (manufactured by Nippon Rika Kogyo Co., Ltd.) Note 3: Amino Surfactant ACMT-L (manufactured by Asahi Kasei Fine Chemicals Co., Ltd.) Note 4: Plantapon Amino SLG-P (manufactured by BASF SE) Note 5: Alanon ALTA (manufactured by Kawaken Fine Chemicals Co., Ltd.) Note 6: Alanon AME (manufactured by Kawaken Fine Chemicals Co., Ltd.) Note 7: Diapon K-SF (manufactured by NOF Corporation) Note 8: NIKKOL MMT (manufactured by Nikko Chemicals Co., Ltd.) Note 9: Amilite GCK-12K (manufactured by Ajinomoto Co., Inc.) Note 10: EMALEX RWIS-150 (manufactured by Nippon Emulsion Co., Ltd.) Note 11: Sorbitol SP (manufactured by Bussan Food Science Co., Ltd.)

[0052] (Manufacturing Method) A. Components (1) to (9) and (18) were heated and dissolved at 80°C and mixed uniformly. B. A was cooled to 40°C. Components (10) to (17) were added to A and uniformly mixed. D. The shampoo composition was obtained by cooling C to room temperature.

[0053] (Evaluation Method) The following evaluation items were evaluated by the following methods respectively. (Evaluation Items) (i) Stability over time (5°C / 1 month) (ii) Good foaming (iii) Good foam quality

[0054] (Evaluation Method 1: (i) Stability over time (5°C / 1 month)) Regarding the stability over time (5°C / 1 month), each shampoo composition was stored statically in a standard bottle in a constant temperature bath at 5°C for 1 month, and then stored statically at 25°C for one day and night. After that, the transmittance at 500 nm was measured using an ultraviolet-visible spectrophotometer (UV2500PC, manufactured by Shimadzu Corporation). The obtained transmittance was judged according to the following four-level judgment criteria. [Four-level Judgment Criteria] (Judgment): (Judgment Criteria) ◎ (Excellent): Transmittance is 95% or more 〇 (Good): Transmittance is 90% or more and less than 95% △ (Slightly unacceptable): Transmittance is less than 90% × (Unacceptable): Turbidity and / or solidification were observed

[0055] <Evaluation Method 2: (ii) Good foaming> Regarding the foam volume, a 1% aqueous solution of each composition (hereinafter abbreviated as "test solution") was prepared, and the foaming was evaluated using the Ross-Miles method (ISO696, JISK3352). Furthermore, the obtained foam height value was judged according to the following four-level judgment criteria. The Ross-Miles method used for evaluating the foam volume of the present invention was carried out according to the following procedure. Specifically, 200 ml of the test solution was poured through a pore with a diameter of 2.9 mm into a graduated cylinder containing 50 ml of the test solution of the same concentration and temperature from a height of 90 cm, and the foam height immediately after flowing down was measured. [Four-level Judgment Criteria (Foam Height Value by Ross-Miles Method)] (Judgment): (Judgment Criteria) ◎ (Excellent): 300 mm or more 〇 (Good): 200 mm or more and less than 300 mm △ (Passable): 100 mm or more and less than 200 mm × (Fail): Less than 100 mm

[0056] <Evaluation Method 3: (C) Goodness of Foam Quality> Twenty professional cosmetic evaluators evaluated the goodness of foam quality (foam retention and foam persistence) when washing hair without applying any hair styling products, etc. to the hair according to the following five - level evaluation criteria (I). Then, the average score of all panelists was judged according to the following four - level judgment criteria (II). <Evaluation Criteria (I)> [Evaluation Result] : [Score] Very Good: 4 points Good: 3 points Average: 2 points Slightly Poor: 1 point Poor: 0 point <Judgment Criteria (II)> (Judgment): (Average Score) ◎ (Excellent): Average score is 3.5 or more 〇 (Good): Average score is 3.0 or more and less than 3.5 △ (Slightly Fail): Average score is 2.0 or more and less than 3.0 × (Fail): Average score is less than 2.0

[0057] As is clear from the results in Tables 1 - 3, the compositions of Examples 1 - 24 were excellent in terms of stability over time with no clouding or solidification observed at 5°C compared to the shampoo compositions of Comparative Examples 1 - 8, and were also excellent in terms of foaming ability and foam quality.

[0058] On the other hand, in Comparative Examples 1 - 3 which contained only one type of component (B) and contained cocooyl glycine K instead of the second component (B), the stability over time and foaming ability were insufficient, and satisfactory results in terms of foam quality were not obtained. In Comparative Examples 4 to 5 containing only one type of Component (B), the stability over time was insufficient, and satisfactory foaming properties could not be obtained. Also, in Comparative Example 6, the stability over time was insufficient, and satisfactory foam quality could not be obtained. In Comparative Examples 7 to 8 containing diglycerin and glycerin with an IOB value exceeding 3.4 instead of Component (C), the stability over time was insufficient, and satisfactory foaming properties could not be obtained.

[0059] Example 25: Shampoo (Component) (%) 1. Sodium lauroyl aspartate (Note 1) 3.0 2. TEA cocooyl glutamate (Note 3) 3.0 3. TEA lauroyl methylalanine (Note 5) 3.0 4. Sodium cocooyl methyl taurine (Note 7) 3.0 5. Cocamidopropyl betaine (Note 12) 5.0 6. Citric acid 0.5 7. Sodium benzoate 0.5 8. Polyquaternium-10 (Note 13) 0.3 9. Polyquaternium-7 (Note 14) 0.3 10. PPG-2 cocoamide (Note 15) 0.5 11. PEG-50 hydrogenated castor oil isostearate (Note 10) 0.3 12. Propylene glycol 0.5 13. Perfume 0.5 14. Sorbitol (Note 11) 1.0 15. Ethanol 0.5 16. Purified water balance Note 12: TEGO BETAIN L-7 OK (manufactured by Evonik) Note 13: Katinal HC-200 (manufactured by Toho Chemical Co., Ltd.) Note 14: Marcoat 550PR (manufactured by Nippon Lubrizol Corporation) Note 15: Amizet 1PC (manufactured by Kawaken Fine Chemical Co., Ltd.)

[0060] (Manufacturing Method) A. Mix 80% of Component 16 and Components 1 - 7 uniformly at 80°C. B. Mix 10% of Component 16 and Components 8, 9 at room temperature. C. Mix Components 10 - 13 at 40°C. D. Mix 10% of Component 16 and Components 14, 15 at room temperature. E. Add B to A and mix uniformly. F. Cool E to room temperature. G. Add C and D to F and mix uniformly. H. Fill G into a container to obtain a shampoo composition.

[0061] The shampoo of Example 25 was excellent in stability over time, and was also excellent in foaming property and foam quality. Also, the pH was 5.6 and (A) / [(A)+(B)] was 0.25.

[0062] Example 26: Shampoo (Components) (%) 1. Sodium Lauroyl Aspartate (Note 1) 4.0 2. TEA-Cocoyl Glutamate (Note 3) 2.0 3. Sodium Myristoyl Methylalanine (Note 6) 2.0 4. Sodium Myristoyl Methyl Taurine (Note 8) 2.0 5. Sodium Cocoa Amphoacetate (Note 16) 5.0 6. Citric Acid 1.0 7. Sodium Benzoate 0.5 8. Cocamide MEA (Note 17) 0.5 9. Polyquaternium-10 (Note 13) 0.3 10. Polyquaternium-22 (Note 18) 0.3 11. PEG-50 Hydrogenated Castor Oil Isostearate (Note 10) 0.5 12. Dipropylene Glycol 0.5 13. Macadamia Nut Oil 0.5 14. Fragrance 0.3 15. Sorbitol (Note 11) 1.0 16. Ethanol 0.5 17. Purified water balance Note 16: REWOTERIC AMC MB (manufactured by Evonik) Note 17: Amisol CME (manufactured by Kawaken Fine Chemicals Co., Ltd.) Note 18: Mercot 280NP (manufactured by Nippon Lubrizol Co., Ltd.)

[0063] (Manufacturing method) A. Mix 80% of Component 17 and Components 1 - 7 uniformly at 80°C. B. Mix 5% of Component 17 and Component 8 uniformly at 80°C. C. Mix 10% of Component 17 and Components 9, 10 at room temperature. D. Mix Components 11 - 14 at 40°C. E. Mix 5% of Component 17 and Components 15, 16 at room temperature. F. Add B and C to A and mix uniformly. G. Cool F to room temperature. H. Add D and E to G and mix uniformly. I. Fill H into a container to obtain a shampoo composition.

[0064] The shampoo of Example 26 was excellent in stability over time, and was also excellent in foaming property and foam quality. Also, the pH was 5.9 and (A) / [(A)+(B)] was 0.4.

[0065] Example 27: Shampoo (Components) (%) 1. Potassium myristyl aspartate (Note 2) 2.0 2. Sodium lauroyl glutamate (Note 4) 2.0 3. TEA lauroyl methyl alaninate (Note 5) 1.0 4. Sodium cocoyl methyl taurate (Note 7) 2.0 5. Cocamidopropyl betaine (Note 12) 4.0 6. Lauramidopropyl betaine (Note 19) 2.0 7. Citric acid 0.3 8. Sodium benzoate 0.5 9. Polyquaternium-10 (Note 13) 0.6 10. Guar hydroxypropyltrimonium chloride (Note 20) 0.2 11. PEG-50 hydrogenated castor oil isostearate (Note 10) 0.3 12. PEG-75 dilaurate (Note 21) 1.0 13. Propylene glycol 0.5 14. Tocopherol 0.03 15. Fragrance 0.7 16. Sorbitol (Note 11) 1.0 17. Ethanol 0.5 18. Purified water balance Note 19: Recabion B-300 (manufactured by Shin Nippon Rika Co., Ltd.) Note 20: Labol Gum CG-M6L (manufactured by MP Gohyaku Kyowa Food & Chemical Co., Ltd.) Note 21: Nonion DL-40HN (manufactured by NOF Corporation)

[0066] (Manufacturing method) A. 80% of Component 18 and Components 1 to 8 are uniformly mixed at 80°C. B. 10% of Component 18 and Components 9 and 10 are mixed at room temperature. C. Components 11 to 15 are mixed at 40°C. D. 10% of Component 18 and Components 16 and 17 are mixed at room temperature. E. B is added to A and uniformly mixed. F. E is cooled to room temperature. G. C and D are added to F and uniformly mixed. H. G is filled into a container to obtain a shampoo composition.

[0067] The shampoo of Example 27 was excellent in stability over time, and was also excellent in foaming property and foam quality. Also, the pH was 5.4 and (A) / [(A)+(B)] was 0.29.

Claims

1. The following components (A) to (D); (A) Acyl aspartic acid or a salt thereof (B) Two or more selected from acyl glutamic acid or a salt thereof, acyl methyl alanine or a salt thereof, and acyl methyl taurine or a salt thereof (C) An alcohol having an IOB value (inorganic value / organic value) of 3.4 or less (D) A pH adjuster A shampoo composition containing the same and having a pH of 4.0 to 6.0 at 25°C.

2. The shampoo composition according to Claim 1, wherein the component (B) contains (B1) acyl glutamic acid or a salt thereof, (B2) acyl methyl alanine or a salt thereof, and (B3) acyl methyl taurine or a salt thereof.

3. The shampoo composition according to Claim 1 or 2, wherein the mass ratio of the component (A) to the total content of the component (A) and the component (B), (A) / {(A)+(B)}, is 0.1 to 0.

8.

4. The shampoo composition according to Claim 1 or 2, further containing a component (E) polyoxyethylene hydrogenated castor oil isostearate.

5. The shampoo composition according to Claim 1 or 2, which is transparent to semi-transparent.

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