Hair composition and hair treatment method

Abstract

To provide a hair composition containing polyphenols, wherein the dispersibility of said polyphenols is improved. [Solution] A hair composition comprising polyphenols, a cationized polymer, an amphoteric surfactant, and water, with a pH of 7.8 or less. An anionic surfactant may also be included. The polyphenol may be one or more selected from the group consisting of catechol, hydroquinone, ferulic acid, resveratrol, polyphenols having two or more 4-hydroxyphenyl groups, polyphenols having one or more 3,4-dihydroxyphenyl groups, and polyphenols having one or more 3,4,5-trihydroxyphenyl groups.

Description

Technical Field

[0001] The present invention relates to a hair composition and a hair treatment method.

Background Art

[0002] Due to physical treatments such as brushing, hair dryers, and hot irons, the texture and luster of hair may deteriorate. Also, due to chemical treatments such as hair color and permanent waves, the outflow of keratin proteins inside the hair may occur, and hair elasticity and hair strength may be lost. For hair damaged by physical or chemical treatments, treatments with various protective agents and repair agents have been proposed.

[0003] For example, Patent Document 1 discloses blending a natural product-derived peptide into a hair composition such as a treatment. Also, it is known to blend a modified peptide in which a predetermined modifying group is introduced into a hair composition. Patent Document 2 discloses a hair composition containing a specific hydroxyl group-containing compound containing catechol or hydroquinone.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described above, various hair protection and repair components (hereinafter sometimes referred to as functional components) may be incorporated into hair compositions. Furthermore, hair compositions may also contain surfactants, etc., depending on their intended use. In order to ensure that the effects of functional components are stably exerted in a hair composition, it is necessary to improve the dispersibility of the functional components within the hair composition. In view of this situation, one of the objectives of the present invention is to provide a hair composition containing polyphenols, wherein the dispersibility of said polyphenols is improved. [Means for solving the problem]

[0006] This disclosure includes the following inventions [1] to [8]. [1] A hair composition comprising polyphenols, a cationized polymer, an amphoteric surfactant, and water, with a pH of 7.8 or less. [2] The hair composition according to [1], comprising an anionic surfactant. [3] The hair composition according to [1] or [2], wherein the polyphenol is one or more selected from the group consisting of catechol, hydroquinone, ferulic acid, resveratrol, polyphenols having two or more 4-hydroxyphenyl groups, polyphenols having one or more 3,4-dihydroxyphenyl groups, and polyphenols having one or more 3,4,5-trihydroxyphenyl groups.

[0007] [4] The hair composition according to [2], wherein the ratio of the amount of amphoteric surfactant to the amount of anionic surfactant is 0.25 or more. [5] A hair composition according to any one of items [1] to [4], wherein the ratio of the amount of amphoteric surfactant to the amount of cationized polymer is 2.0 or more.

[0008] [6] A hair composition according to any one of items [1] to [5], used for washing hair. [7] The hair composition according to any one of [1] to [5], wherein the hair composition is a hair cleansing agent that is transparent or translucent in appearance. A hair treatment method using any one of the hair compositions described in [8], [1] to [5]. [Effects of the Invention]

[0009] The hair composition according to this disclosure provides a hair composition that contains polyphenols and has improved dispersibility of said polyphenols. [Modes for carrying out the invention]

[0010] The hair composition according to this disclosure comprises a polyphenol, a cationized polymer, an amphoteric surfactant, and water, and has a pH of 7.8 or less.

[0011] It is known that applying compositions containing polyphenols such as catechol to hair improves hair properties (for example, Patent Document 2). In the examples of Patent Document 2, a composition in which polyphenol components and metal salts are added to water is used as a hair composition. However, it was found that when these polyphenols are added to a composition containing a surfactant intended for use as a hair cleanser (shampoo), precipitates and gels are formed in the composition, impairing the dispersibility of the polyphenols. Based on this situation, a composition to improve the dispersibility of polyphenols was investigated. As a result of further investigation, it was found that an aqueous composition containing a cationized polymer and an amphoteric surfactant in addition to polyphenols, with a pH of 7.8 or lower, improves the dispersibility of polyphenols, and can be used to construct a hair composition useful as a hair cleanser or its constituent component. Furthermore, it was found that a transparent composition can be obtained by adjusting the amount of these components added.

[0012] [Specific examples of embodiments] The hair compositions relating to this disclosure will be described in more detail below. In this specification, unless otherwise specified, "A to B" representing a numerical range means "A or greater and B or less".

[0013] <Hair composition> The hair composition according to this disclosure is an aqueous composition containing water, in which each component is dissolved or dispersed in water. The amount of water in the hair composition is not particularly limited, but is, for example, 60% by mass or more. The hair composition according to this disclosure may be, for example, a transparent solution.

[0014] <Polyphenols> The hair composition according to this disclosure contains polyphenols. Polyphenols that have an effect of improving hair properties can be used. Preferably, such polyphenols include one or more selected from the group consisting of catechol, hydroquinone, ferulic acid, resveratrol, polyphenols having two or more 4-hydroxyphenyl groups, polyphenols having one or more 3,4-dihydroxyphenyl groups, and polyphenols having one or more 3,4,5-trihydroxyphenyl groups. While not bound by theory, these polyphenols are thought to be involved in the formation of cross-linking structures between keratin proteins in hair, thereby contributing to the improvement of hair properties.

[0015] Polyphenols having two or more 4-hydroxyphenyl groups, polyphenols having one or more 3,4-dihydroxyphenyl groups, and polyphenols having one or more 3,4,5-trihydroxyphenyl groups include, specifically, those having only a 4-hydroxyphenyl group, those having only a 3,4-dihydroxyphenyl group, those having only a 3,4,5-trihydroxyphenyl group, those having a 4-hydroxyphenyl group and a 3,4-dihydroxyphenyl group, those having a 4-hydroxyphenyl group and a 3,4,5-trihydroxyphenyl group, those having a 3,4-dihydroxyphenyl group and a 3,4,5-trihydroxyphenyl group, and those having a 4-hydroxyphenyl group, a 3,4-dihydroxyphenyl group, and a 3,4,5-trihydroxyphenyl group.

[0016] Polyphenols having a 4-hydroxyphenyl group, a 3,4-dihydroxyphenyl group, or a 3,4,5-trihydroxyphenyl group are known as polyphenols belonging to the flavonoid (flavones, flavanals, flavonols, etc.) and chlorogenic acids, and are found in plant extracts. An example of a polyphenol having two or more 4-hydroxyphenyl groups is chiriroside. An example of an extract containing chiriroside is strawberry seed extract. An example of a polyphenol having one 3,4-dihydroxyphenyl group is luteolin, catechin, quercetin, chlorogenic acid, caffeoyl glucose, quercitrin, and rutin. An example of an extract containing luteolin is perilla seed extract and chrysanthemum flower extract. An example of an extract containing catechin is tea leaf extract. An example of an extract containing quercetin is onion root extract. An example of an extract containing chlorogenic acid is lobster coffee tree seed extract. An example of an extract containing caffeoyl glucose is cherry blossom extract. Examples of extracts containing quercitrin include kiwi seed extract. Examples of extracts containing rutin include buckwheat leaf extract. Examples of polyphenols having two or more 3,4-dihydroxyphenyl groups include fukinolic acid, chicory acid, and echinacoside. Examples of extracts containing fukinolic acid include butterbur leaf / stem extract. Examples of extracts containing chicory acid include purple coneflower extract. Examples of extracts containing echinacoside include cystance tubulosa root extract. Examples of polyphenols having one 3,4,5-trihydroxyphenyl group include gallic acid, propyl gallate, and delphinidin-3,5-glucoside. Examples of extracts containing gallic acid include evening primrose seed extract. Examples of extracts containing delphinidin-3,5-glucoside include Aristoteria chilensis fruit extract.Examples of polyphenols having three or more 3,4,5-trihydroxyphenyl groups include tannic acid and GHG (1,2-di-Galloyl-4,6-Hexahydroxydiphenoyl-β-D-Glucose). Examples of extracts containing GHG include tea leaf extract.

[0017] From the perspective of permeating into the hair to improve hair physical properties, the polyphenol may have a molecular weight of less than 3000, preferably less than 2000, and more preferably less than 1000. The blending ratio of the polyphenol with a molecular weight of less than 3000 is not particularly limited, but may be 0.001% by mass or more and less than 1.0% by mass, preferably 0.005% by mass or more and less than 0.8% by mass, and more preferably 0.01% by mass or more and less than 0.5% by mass. When it is 0.001% by mass or more, it is suitable for improving hair physical properties, and when it is less than 1.0% by mass, it is suitable for cost reduction.

[0018] The blending amount of the polyphenol in the hair composition is not particularly limited, but is preferably 0.001% by mass or more and less than 1.0% by mass, more preferably 0.005% by mass or more and less than 0.8% by mass, and even more preferably 0.01% by mass or more and less than 0.5% by mass. When it is 0.001% by mass or more, it is suitable for improving hair physical properties, and when it is less than 1.0% by mass, it is suitable for cost reduction. Further, when the hair composition is a hair cleansing agent (shampoo), an anionic surfactant or a cationized polymer is often blended. According to the hair composition according to the present disclosure, by including an amphoteric surfactant in addition to the polyphenol, the compatibility with the anionic surfactant and the cationized polymer is improved, and as a realizable aspect, a transparent and uniform hair cleansing composition can be constituted.

[0019] <Cationized polymer> The hair composition according to the present disclosure contains a cationized polymer (cationized polymer). A cationized polymer is a polymer having a substituent that cationizes, and examples of the substituent include an amino group and ammonium. It is preferable that the hair composition according to the present disclosure contains a water-soluble cationized polymer.

[0020] Examples of the cationized polymer include cationized celluloses such as polyquaternium-4 (hydroxyethyl cellulose dimethyldiallylammonium chloride) and polyquaternium-10 (O-[2-hydroxy-3-(trimethylammonio)propyl] hydroxyethyl cellulose chloride); dimethyldiallylammonium·acrylamide copolymers such as polyquaternium-7 and polyquaternium-52; vinylpyrrolidone·methylvinylimidazolium copolymers such as polyquaternium-16; cationized guar gums such as guar hydroxypropyltrimonium chloride and hydroxypropyl guar hydroxypropyltrimonium chloride; and the like. The cationized polymer can contain one or more of these.

[0021] The blending amount of the cationized polymer in the hair composition according to the present disclosure is not particularly limited as long as the effects according to the present disclosure can be obtained, and for example, it may be 0.1% by mass or more and 2% by mass or less. Also, the ratio of the blending amount of the cationized polymer to the blending amount of the amphoteric surfactant is preferably 0.5 or less, more preferably 0.3 or less, still more preferably 0.25 or less, and even more preferably 0.15 or less. The ratio of the blending amount of the cationized polymer to the total blending amount of the surfactant is preferably 0.25 or less, more preferably 0.15 or less, and even more preferably 0.05 or less. The cationized polymer is blended to suppress the entanglement of hair when rinsing off the shampoo when the hair composition is a hair cleansing agent (shampoo). When the cationized polymer is blended in the hair composition at 0.1% by mass or more, an effect of suppressing the entanglement of hair can be expected.

[0022] <Amphoteric surfactant> The hair composition according to this disclosure contains an amphoteric surfactant. The hair composition according to this disclosure, by combining a polyphenol and an amphoteric surfactant, is thought to contain a polyphenol and, in one feasible embodiment, provide a homogeneous solution that does not produce precipitates or gels. The amphoteric surfactant is not particularly limited as long as it provides the effects according to this disclosure, and examples include betaine acetate type amphoteric surfactants, sulfobetaine type amphoteric surfactants, alkylbetaine type amphoteric surfactants, imidazoline betaine type amphoteric surfactants, etc., and one or more of these may be included.

[0023] Examples of betaine-type amphoteric surfactants include fatty acid amidopropyl dimethylaminoacetic acid betaine, alkyl dimethylaminoacetic acid betaine, and alkyl dihydroxyethylaminoacetic acid betaine. Fatty acid amidopropyl dimethylaminoacetic acid betaine is represented by the following general formula (1). Examples of fatty acid amidopropyl dimethylaminoacetic acid betaine include lauric acid amidopropyl dimethylaminoacetic acid betaine (lauric acid amidopropyl betaine, lauramidopropyl betaine), isostearic acid amidopropyl dimethylaminoacetic acid betaine (isostearamidopropyl betaine), myristinic acid amidopropyl dimethylaminoacetic acid betaine (myristamidopropyl betaine), coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine (cocamidopropyl betaine), and palm kernel oil fatty acid amidopropyl dimethylaminoacetic acid betaine. [ka] (In general formula (1), R represents an alkyl group, for example, a linear alkyl group having 10 to 16 carbon atoms.)

[0024] Alkyldimethylaminoacetic acid betaine is represented by the following general formula (2). Examples of alkyldimethylaminoacetic acid betaine include lauryldimethylaminoacetic acid betaine, myristyldimethylaminoacetic acid betaine, and stearyldimethylaminoacetic acid betaine. [ka] (In general formula (2), R represents an alkyl group, for example, a linear alkyl group having 10 to 18 carbon atoms.)

[0025] Examples of sulfobetaine-type amphoteric surfactants include N-alkyl-N,N-dimethylammonium-N-propyl sulfonate, N-alkyl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate, and N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate.

[0026] N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate is represented by the following general formula (3). Examples of this N-fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate include N-lauric acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate (indicated name: lauramidopropyl hydroxysultaine) and N-coconut oil fatty acid amidopropyl-N,N-dimethylammonium-N-(2-hydroxypropyl) sulfonate (indicated name: cocamidopropyl hydroxysultaine). [ka] (In general formula (3), R represents an alkyl group or alkenyl group. For example, R is a saturated or unsaturated linear alkyl group having 9 to 16 carbon atoms.)

[0027] Examples of imidazoline betaine-type amphoteric surfactants include 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, N-acylaminoethyl-N-2-hydroxyethylglycine and its salts. N-acylaminoethyl-N-2-hydroxyethylglycine is represented by the following general formula (4). Examples of N-acylaminoethyl-N-2-hydroxyethylglycine and its salts include sodium cocoamphoacetate, sodium caproamphoacetate, sodium lauroamphoacetate, and stearoamphoacetate (all of which are listed as their names). [ka] (In general formula (4), R 1 This represents a saturated or unsaturated hydrocarbon group. For example, a hydrocarbon group with 10 to 18 carbon atoms.

[0028] N-acylaminoethyl-N-2-hydroxyethylpropionic acid is represented by the following general formula (5). Examples of N-acylaminoethyl-N-2-hydroxyethylglycine and its salts include sodium cocoamphopropionate (indicated name). [ka] (In the above general formula (5), R 2 (This represents a hydrocarbon group, for example, a saturated or unsaturated hydrocarbon group with 10 to 18 carbon atoms.)

[0029] The amount of amphoteric surfactant in the hair composition according to this disclosure is not particularly limited as long as the effects according to this disclosure are obtained, and may be, for example, 1% by mass or more and 30% by mass or less, preferably 3% by mass or more and 20% by mass or less, and more preferably 5% by mass or more and 15% by mass or less. The ratio of the amount of amphoteric surfactant to the amount of cationized polymer is good to be 2.0 or more, preferably 3.0 or more, and more preferably 4.5 or more. The upper limit of the ratio of the amount of amphoteric surfactant to the amount of cationized polymer is not limited as long as the effects according to this disclosure are obtained, but from the viewpoint of cost reduction it may be 30 or less, and more preferably 20 or less.

[0030] <Anionic surfactants> The hair composition according to this disclosure preferably contains an anionic surfactant. When the hair composition is a hair cleansing agent, an anionic surfactant is often included as a cleansing component. In one feasible embodiment, the hair composition according to this disclosure may contain a surfactant suitable for hair cleansing and a polyphenol that contributes to improving hair properties, and may constitute a transparent liquid that does not contain precipitates or gels.

[0031] As anionic surfactants, anionic surfactants known as hair cleansing ingredients can be suitably incorporated. Examples of such anionic surfactants include carboxylic acid-based anionic surfactants such as N-acyl amino acid salts, fatty acid salts, polyoxyethylene alkyl ether carboxylates, and acyl lactates; sulfonic acid-based anionic surfactants such as alkanesulfonates, α-olefin sulfonates, α-sulfo fatty acid methyl esters, acyl isethionates, alkyl sulfosuccinates, and N-acyl methyl taurates; sulfate ester-based anionic surfactants such as alkyl sulfates, polyoxyethylene alkyl ether sulfates, fatty acid alkanolamide sulfates, and monoacylglycerin sulfates; and phosphate-based anionic surfactants such as monoalkyl phosphates, polyoxyethylene alkyl ether phosphates, and polyoxyethylene alkylaryl ether phosphates. One or more of these can be incorporated in combination.

[0032] Examples of polyoxyethylene alkyl ether carboxylates include polyoxyethylene alkyl ether acetates. Examples of such polyoxyethylene alkyl ether acetates include polyoxyethylene lauryl ether acetate (2 E.O.), polyoxyethylene lauryl ether acetate (3 E.O.), polyoxyethylene lauryl ether acetate (4 E.O.), polyoxyethylene lauryl ether acetate (4.5 E.O.), polyoxyethylene lauryl ether acetate (5 E.O.), polyoxyethylene lauryl ether acetate (10 E.O.), polyoxyethylene tridecyl ether acetate (2 E.O.), polyoxyethylene tridecyl ether acetate (3 E.O.), and polyoxyethylene tridecyl ether acetate (7 E.O.). In the case of polyoxyethylene alkyl ether acetates, the salt forms include thorium salts, potassium salts, ammonium salts, diethanolamine salts, and triethanolamine salts (the number before "EO" represents the average number of moles of polyoxyethylene added).

[0033] Examples of amino acid-based anionic surfactants include N-acyl glutamate surfactants such as N-coconut oil fatty acid glutamate, N-lauroyl glutamate, N-myristoyl glutamate, N-palmitoyl glutamate, N-stearoyl glutamate, and N-oleoyl glutamate; N-acyl alanine surfactants such as N-coconut oil fatty acid alanine salt, N-lauroyl alanine salt, N-myristoyl alanine salt, N-palmitoyl alanine salt, N-stearoyl alanine salt, and N-oleoyl alanine salt; N-acyl methyl alanine surfactants such as N-coconut oil fatty acid methyl alanine salt, N-lauroyl methyl alanine salt, and N-myristoyl methyl alanine salt; and N-coconut oil fatty acid sarcosine salt, N- Examples include N-acyl sarcosinic acid surfactants such as lauroyl sarcosine salt, N-myristoyl sarcosine salt, and N-oleoyl sarcosine salt; N-acylglycine surfactants such as N-coconut oil fatty acid glycine salt, N-lauroyl glycine salt, N-myristoyl glycine salt, N-palmitoyl glycine salt, N-stearoyl glycine salt, and N-oleoyl glycine; N-acyl aspartic acid surfactants such as N-coconut oil fatty acid aspartate, N-lauroyl aspartate, N-myristoyl aspartate, N-palmitoyl aspartate, N-stearoyl aspartate, and N-oleoyl aspartate; and N-acyl silk amino acid surfactants such as N-lauroyl silk amino acid salt. Here, examples of salt forms of amino acid-based anionic surfactants include sodium salts, potassium salts, and triethanolamine salts.

[0034] The amount of anionic surfactant in the hair composition according to this disclosure is not particularly limited as long as the effects according to this disclosure are obtained, and may be, for example, 1% by mass or more and 30% by mass or less, preferably 3% by mass or more and 20% by mass or less, and more preferably 5% by mass or more and 15% by mass or less. The ratio of the amount of amphoteric surfactant to the amount of anionic surfactant may be 0.25 or more. The upper limit of the ratio of the amount of amphoteric surfactant to the amount of anionic surfactant is not limited as long as the effects according to this disclosure are obtained, but from the viewpoint of cost reduction it may be 5 or less, and more preferably 3 or less.

[0035] <Other ingredients> The hair composition relating to this disclosure may contain any components other than those described above, insofar as it has the effects relating to this disclosure. Examples of optional components include nonionic surfactants, cationic surfactants, lower alcohols, polyhydric alcohols, sugars, high molecular weight compounds, amino acids, plant and animal extracts, inorganic compounds, fragrances, preservatives, pH adjusters, salts, and the like.

[0036] When a hair composition is a hair cleansing agent, a nonionic surfactant may be added to create a shampoo with appropriate viscosity. Examples of nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol tetra fatty acid esters, glycerin fatty acid esters, alkyl glucosides, sorbitan fatty acid esters, polyglycerin fatty acid esters, and sucrose fatty acid esters, and one or more of these may be added. When a nonionic surfactant is added, its amount is set as appropriate, but for example, it is 0.1% by mass or more and 5% by mass or less.

[0037] <ph> The hair composition according to this disclosure has a pH of 7.8 or less. By having a pH of 7.8 or less and containing the above-mentioned essential components, in one feasible embodiment, a uniform, transparent liquid free from precipitates or gels can be obtained. The lower limit of the pH is not particularly limited, but may be 2.0 or higher, and preferably 3.0 or higher. When the hair composition is a shampoo, the pH is generally adjusted to about 3.0 to 7.0. A pH adjusting agent may be added to adjust the pH to a predetermined value. For example, citric acid, lactic acid, phosphoric acid, sodium hydroxide, potassium hydroxide, etc. may be added as pH adjusting agents.

[0038] <Viscosity> The viscosity of the hair composition according to this disclosure is not particularly limited, but if the hair composition is composed of a hair cleansing agent, it is preferable that it is a liquid with a viscosity that is easily dispensed from a pump-type container commonly used for known shampoos. For example, a viscosity of about 500 to 3,000 mPa·s. The viscosity is taken from the value 60 seconds after the start of viscosity measurement when measured using a B-type viscometer (temperature: 25°C, rotor: appropriately set according to viscosity, rotor rotation speed: appropriately set according to viscosity).

[0039] <Hair composition> The hair composition according to this disclosure is suitably used as a hair cleansing composition. The hair composition according to this disclosure may be used as a shampoo product as is, or it may be combined with other ingredients to form a shampoo product. For example, the hair composition according to this disclosure may be used as a compounding ingredient in a hair cleansing agent. The hair composition according to this disclosure is preferably used in a hair cleansing agent (shampoo product) that is transparent or translucent in appearance. The hair composition according to this disclosure has a transparent appearance and is suitably used in transparent products. In this specification, "transparent or translucent" means transparency that allows the background to be seen when the composition contained in a bottomed cylindrical glass container with a diameter of 4 cm is visually inspected from the front.

[0040] <Hair Treatment Methods> The hair treatment method according to this disclosure is a method performed using the hair composition described above. If the hair composition is a hair cleansing agent, the hair treatment method can be a known hair washing method. For example, this method involves applying the hair composition to hair that has been wet with water, lathering it up, rinsing it, and drying the hair as needed. The hair composition according to this disclosure contains polyphenols and can provide hair care at the same time as washing.

[0041] The hair treated by the hair treatment method is not particularly limited. Since the physical properties of hair deteriorate due to physical treatments (e.g., brushing) or chemical treatments (e.g., oxidative hair dyeing, hair straightening, permanent wave treatment), such hair is suitable for the hair treatment method according to this disclosure. Chemical treatments of hair involve oxidation reactions with oxidizing agents such as hydrogen peroxide, which can damage the hair and reduce its physical properties. However, by using the hair composition according to this disclosure, it is possible to suppress the deterioration of hair properties or even improve them.

[0042] [Examples] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0043] <Preparation of hair composition> Hair compositions were prepared by blending polyphenols, cationic polymers, amphoteric surfactants, anionic surfactants, and other components with water to achieve the compositions shown in Tables 1 to 5. The amounts of each component shown in Tables 1 to 5 represent the purity (%) of each component. Although the amount of water is omitted in each of Tables 1 to 5, the components were blended so that the total amount including water was 100%. The pH was adjusted by adding citric acid as needed.

[0044] <Rating> The prepared compositions (at 25°C) were visually inspected and evaluated according to the following criteria. Evaluation criteria for appearance ○ (Good): A uniform, transparent solution. △ (Intermediate): A transparent gel is dispersed in water. × (Defective): White dispersion, white precipitate, or gel that does not disperse in water is present.

[0045] The ingredients used are as follows: [Amphoteric surfactants] • Lauramidopropyl betaine • Coconut oil fatty acid amidopropyl betaine • Isostearamidopropyl betaine; Isostearamidopropyl betaine was formulated using "Obazoline ISAB" manufactured by Toho Chemical Co., Ltd., which contains 31% isostearamidopropyl betaine. • Lauramidopropyl hydroxysultaine 2-Alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine [Anionic surfactants] • Sodium olefin (C14-16) sulfonate • Sodium polyoxyethylene lauryl ether acetate (5E.O.) • Sodium polyoxyethylene lauryl ether sulfate (2E.O.) • N-coconut oil fatty acid acyl-L-glutamate sodium • Sodium N-lauroyl-L-aspartate [Polyphenols] Tannic acid • Coneflower extract; Symfinity 1298 manufactured by Symrise was used. [Cationized polymers] • Polyquaternium-10; Kao Corporation's "Poise C-80M" was used.

[0046] <Formulation and Results> [Table 1]

[0047] As shown in Table 1, the compositions of Examples 1 to 5, which are aqueous compositions containing polyphenols, cationized polymers, and amphoteric surfactants with a pH of 7.5 or less, were all homogeneous transparent solutions. Homogeneous transparent solutions were obtained regardless of whether amphoteric surfactants with different fatty acid compositions, or whether betaine-based or sultaine-based surfactants were used.

[0048] [Table 2]

[0049] As shown in Table 2, the compositions of Examples 6 to 11, which are aqueous compositions containing polyphenols, cationic polymers, amphoteric surfactants, and anionic surfactants, and having a pH of 7.5 or less, were all homogeneous transparent solutions. A homogeneous transparent solution was obtained regardless of whether tannic acid or echinacea extract was used as the polyphenol. Good results were obtained in all cases where the ratio of amphoteric surfactant to anionic surfactant was in the range of 0.35 to 0.81. Furthermore, good results were obtained in all cases where the ratio of amphoteric surfactant to cationic polymer was in the range of 4.50 to 7.50.

[0050] [Table 3]

[0051] As shown in Table 3, the compositions of Examples 12 to 15, which are aqueous compositions containing polyphenols, cationized polymers, amphoteric surfactants, and anionic surfactants, and having a pH of 7.5 or less, were all homogeneous transparent solutions. In Examples 12 to 15, the type and amount of anionic surfactant were changed, but all yielded good results.

[0052] [Table 4]

[0053] As shown in Table 4, the compositions of Comparative Examples 1 to 5, which contained polyphenols, cationized polymers, and anionic surfactants, and had a pH of 7.5 or lower but did not contain amphoteric surfactants, contained white dispersions (precipitations) or gels that did not disperse in water, and compositions with a good appearance were not obtained. Similar results were obtained in the example where purple coneflower extract was used instead of tannic acid as the polyphenol (Comparative Example 2). Comparative Example 6, which contained polyphenols and cationized polymers, also did not yield a composition with a good appearance. On the other hand, in Reference Example 1, where tannic acid was mixed with water, and in Reference Example 2, where a cationized polymer was mixed with water, a uniform, transparent solution was obtained.

[0054] [Table 5]

[0055] As shown in Table 5, the compositions of Examples 16 and 17, which are aqueous compositions containing polyphenols, cationized polymers, and amphoteric surfactants, with pH values ​​of 5.8 and 7.5, were both homogeneous, transparent solutions. In contrast, Comparative Example 7, which had the same composition as Examples 16 and 17 but with a pH of 7.9, received a negative (×) rating for appearance.

[0056] The embodiments disclosed herein should be understood to be illustrative in all respects and not restrictive in any way. The scope of the present invention is defined by the claims and is intended to include all modifications in the sense and scope equivalent to the claims.< / ph>

Claims

1. A hair composition comprising polyphenols, a cationic polymer, an amphoteric surfactant, and water, with a pH of 7.8 or less.

2. A hair composition according to claim 1, comprising an anionic surfactant.

3. The hair composition according to claim 1, wherein the polyphenol is one or more selected from the group consisting of catechol, hydroquinone, ferulic acid, resveratrol, polyphenols having two or more 4-hydroxyphenyl groups, polyphenols having one or more 3,4-dihydroxyphenyl groups, and polyphenols having one or more 3,4,5-trihydroxyphenyl groups.

4. The hair composition according to claim 2, wherein the ratio of the amount of amphoteric surfactant to the amount of anionic surfactant is 0.25 or more.

5. The hair composition according to claim 1, wherein the ratio of the amount of amphoteric surfactant to the amount of cationized polymer is 2.0 or more.

6. A hair composition according to any one of claims 1 to 5, used for washing hair.

7. The hair composition according to any one of claims 1 to 5, wherein the hair composition is a hair cleansing agent that is transparent or translucent in appearance.

8. A hair treatment method using the hair composition described in any one of claims 1 to 5.

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