Hair cosmetic composition

Abstract

To provide a hair cosmetic composition capable of suppressing discoloration caused by formulated components in the composition and imparting flexibility to the hair.SOLUTION: The hair cosmetic composition contains (A) a cationic surfactant.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] It is known that hair is damaged by chemical treatments such as hair coloring and bleaching, physical treatments such as combing, and heat from hair dryers, hair irons, etc., which not only peels off the cuticle on the hair surface but also causes hair components (proteins, amino acids, lipids, etc.) to elute, resulting in uneven distribution of hydrophobic and hydrophilic substances inside the hair. When the balance between hydrophobic and hydrophilic substances inside the hair is disrupted, when a lot of moisture enters and leaves the hair after drying with a hair dryer or in a high-humidity environment, the localization of moisture inside the hair becomes more uneven, causing problems such as hair becoming wavy, spreading out and becoming difficult to manage, as well as a loss of flexibility.

[0003] As a means for solving such problems, it has been known to incorporate amino acids or salts thereof into hair cosmetic compositions such as shampoos and conditioners for in-bath use and treatments for out-bath use. Summary of the Invention [Problem to be solved by the invention]

[0004] However, such conventional hair cosmetic compositions may discolor due to a reaction between an amino acid or a salt thereof in the composition and a fragrance component typically contained in the composition, such as a reaction between glycine in the composition and β-ionone, a ketone fragrance component, causing the hair cosmetic composition to discolor to a pale orange.

[0005] An object of one embodiment of the present invention is to provide a hair cosmetic composition that can inhibit discoloration caused by ingredients contained in the composition and can impart softness to hair. [Means for solving the problem]

[0006] An embodiment of the present invention is as follows. <1> (A) A hair cosmetic composition containing a cationic surfactant. <2> (B) an amino acid or a salt thereof; (C) a ketone-based fragrance; <1> The hair cosmetic composition according to claim 1. [Effects of the Invention]

[0007] According to one embodiment of the present invention, it is possible to provide a hair cosmetic composition that can inhibit discoloration caused by ingredients contained in the composition and can impart softness to hair. DETAILED DESCRIPTION OF THE INVENTION

[0008] (Hair cosmetic composition) The hair cosmetic composition of the present embodiment contains (A) a cationic surfactant, (B) an amino acid or a salt thereof, and (C) a ketone-based fragrance. The hair cosmetic composition may contain other ingredients as needed.

[0009] In this specification, "(A) cationic surfactant" may be referred to as "(A)" or "(A) component," "(B) amino acid or a salt thereof" may be referred to as "(B)" or "(B) component," and "(C) ketone-based fragrance" may be referred to as "(C)" or "(C) component."

[0010] <(A) Cationic surfactant> Component (A) is contained in the hair cosmetic composition to inhibit discoloration of the hair cosmetic composition and to impart softness to the hair.

[0011] The component (A) is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of inhibiting discoloration of the hair cosmetic composition and improving hair softness, benzalkonium chloride, cetylpyridinium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, cetyltrimethylammonium chloride, and distearyldimethylammonium chloride are preferred. Among these, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, cetyltrimethylammonium chloride, and distearyldimethylammonium chloride are more preferred as component (A). These may be used alone or in combination of two or more.

[0012] Component (A) may be synthesized appropriately or commercially available. Examples of commercially available products of component (A) include, by trade name, Lipocard (registered trademark) T-800 (stearyltrimethylammonium chloride, manufactured by Lion Specialty Chemicals Co., Ltd.), Lipocard (registered trademark) C22-80 (behenyltrimethylammonium chloride, manufactured by Lion Specialty Chemicals Co., Ltd.), Lipocard (registered trademark) C16-29 (cetyltrimethylammonium chloride, manufactured by Lion Specialty Chemicals Co., Ltd.), Lipocard (registered trademark) 2HT-75 (distearyldimethylammonium chloride, manufactured by Lion Specialty Chemicals Co., Ltd.), Benzalkonium Chloride Solution 50 Nissan Cation F2-50E (benzalkonium chloride, manufactured by NOF Corporation), and cetylpyridinium chloride (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.).

[0013] The content of component (A) is not particularly limited and can be selected appropriately depending on the purpose. From the viewpoint of the effect of inhibiting discoloration of the hair cosmetic composition and improving hair softness, the content is preferably from 0.3% by mass to 10.0% by mass, and more preferably from 0.5% by mass to 5.0% by mass, relative to the total amount of the hair cosmetic composition.

[0014] When the content of component (A) is 0.3% by mass or more relative to the total amount of the hair cosmetic composition, the hair cosmetic composition exhibits good discoloration-inhibiting effect, hair softness, and reduced skin irritation. When the content of component (A) is 10.0% by mass or less relative to the total amount of the hair cosmetic composition, the hair cosmetic composition exhibits good discoloration-inhibiting effect, hair softness, and reduced skin irritation.

[0015] <(B) Amino acid or salt thereof> Component (B) is contained in the hair cosmetic composition to impart an effect of inhibiting hair frizz after drying with a hair dryer.

[0016] The component (B) is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of improving the effect of inhibiting discoloration of the hair cosmetic composition and the effect of inhibiting frizziness after drying with a hair dryer, neutral amino acids or salts thereof, acidic amino acids or salts thereof, and basic amino acids or salts thereof are preferred, and neutral amino acids or salts thereof are more preferred. These may be used alone or in combination of two or more.

[0017] As the neutral amino acid or a salt thereof, glycine or serine is preferred, and glycine is more preferred, from the viewpoint of improving the effect of inhibiting discoloration of the hair cosmetic composition and the effect of inhibiting frizziness of hair after drying with a hair dryer.

[0018] Examples of acidic amino acids or salts thereof include glutamic acid, sodium glutamate, etc. Among these, glutamic acid is preferred as the acidic amino acid or salts thereof from the viewpoint of achieving a good effect of inhibiting discoloration of the hair cosmetic composition and a good effect of inhibiting frizziness of hair after drying with a hair dryer.

[0019] Examples of basic amino acids or salts thereof include arginine, histidine, arginine hydrochloride, histidine hydrochloride, etc. Among these, arginine or histidine is preferred as the basic amino acid or salt thereof from the viewpoint of improving the effect of inhibiting discoloration of the hair cosmetic composition and the effect of inhibiting frizziness of hair after drying with a hair dryer.

[0020] Component (B) may be synthesized appropriately or may be a commercially available product, such as glycine (manufactured by Nippon Rikagaku Co., Ltd.), L-serine (manufactured by Nippon Rikagaku Co., Ltd.), L-glutamic acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), L-arginine C grade (manufactured by Ajinomoto Healthy Supply Co., Ltd.), and L-histidine (manufactured by Nippon Rikagaku Co., Ltd.).

[0021] The content of component (B) is not particularly limited and can be selected appropriately depending on the purpose. However, from the viewpoint of achieving a good effect of inhibiting discoloration of the hair cosmetic composition and inhibiting frizziness of hair after drying with a hair dryer, the content is preferably 0.1% by mass or more and 2.0% by mass or less, and more preferably 0.2% by mass or more and 1.0% by mass or less.

[0022] When the content of component (B) is 0.1% by mass or more of the total amount of the hair cosmetic composition, the effect of suppressing hair frizz after drying with a hair dryer is good.When the content of component (B) is 2.0% by mass or less of the total amount of the hair cosmetic composition, the effect of suppressing discoloration of the hair cosmetic composition is good.

[0023] <(C) Ketone-based fragrance> Component (C) is contained in the hair cosmetic composition to impart an effect of suppressing the odor of the base material.

[0024] The component (C) is not particularly limited and can be selected appropriately depending on the purpose, but from the viewpoint of achieving a good base material odor suppression effect, β-ionone, raspberry ketone, α-ionone, γ-ionone, β-damascone, rosephenone, hedione, epionone, acetophenone, methyl cedryl ketone, dihydroactiniolide, and Iso-E-Super are preferred. Among these, β-ionone or raspberry ketone are more preferred as ketone-based fragrances. These may be used alone or in combination of two or more.

[0025] The ketone fragrance may be synthesized appropriately or may be a commercially available product. Examples of commercially available ketone fragrances include B-IONONE (β-ionone, manufactured by Takasago International Corporation), RASPBERRY KETONE (raspberry ketone, manufactured by Takasago International Corporation), α-ionone (α-ionone, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), β-ionone (β-damascone, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), α-(Trichloromethyl)benzyl Acetate (rosephenone, manufactured by Tokyo Chemical Industry Co., Ltd.), Hedion (manufactured by WPA Chemicals), Epichlorohydrin (manufactured by Tokyo Chemical Industry Co., Ltd.), Acetophenone (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), and Iso E Super (>80%) (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.).

[0026] The content of component (C) is not particularly limited and can be selected appropriately depending on the purpose. However, from the viewpoint of achieving a good effect of suppressing the base material odor, the content is preferably 0.01% by mass or more and 0.05% by mass or less, and more preferably 0.03% by mass or more and 0.05% by mass or less, relative to the total amount of the hair cosmetic composition.

[0027] When the content of component (C) is 0.01% by mass or more relative to the total amount of the hair cosmetic composition, the effect of suppressing base material odor is good.When the content of component (C) is 0.05% by mass or less relative to the total amount of the hair cosmetic composition, the effect of suppressing base material odor is good.

[0028] <Other ingredients> In addition to the components (A), (B), and (C), the hair cosmetic composition may contain other components as needed, provided that the effects of the present invention are not impaired.

[0029] The other components are not particularly limited and can be appropriately selected depending on the purpose. Examples of such other components include anionic surfactants, amphoteric surfactants, nonionic surfactants such as one or more selected from polyoxyethylene phytosterols having an average number of moles of ethylene oxide added of 10 to 40, and branched polyoxyethylene alkyl ethers or branched polyoxyethylene alkenyl ethers having a carbon number of 14 to 20 and an average number of moles of ethylene oxide added of 10 to 40 (hereinafter sometimes referred to as "component (D)"), lower alcohols, , higher alcohols, fatty acids such as higher fatty acids having 10 to 22 carbon atoms, oils, silicones, humectants such as polyhydric alcohols and sugar alcohols such as isoprene glycol, thickeners, gelling agents, powders, water-soluble polymers, film-forming agents, resins, UV absorbers, antibacterial agents, fragrances other than component (C), pigments, opacifying agents, preservatives, deodorants, salts, pH adjusters, cooling agents, animal and microbial extracts, plant extracts, blood circulation promoters, astringents, antidandruff agents, antiseborrheic agents, whitening agents, anti-inflammatory agents, cell activators, chelating agents, keratolytic agents, enzymes, hormones, and vitamins. These may be used alone or in combination of two or more.

[0030] The contents of other components are not particularly limited as long as they do not impair the effects of the present invention, and can be set appropriately depending on the purpose.

[0031] The other components may be appropriately synthesized or commercially available.

[0032] <<Amphoteric surfactants>> The amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples include betaine-type amphoteric surfactants and amino acid-type amphoteric surfactants. Among these, betaine-type amphoteric surfactants are preferred. These may be used alone or in combination of two or more.

[0033] The betaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include alkylbetaine-type amphoteric surfactants, amidobetaine-type amphoteric surfactants, sulfobetaine-type amphoteric surfactants, imidazoline-type amphoteric surfactants, etc. These may be used alone or in combination of two or more.

[0034] The alkyl betaine type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include lauryl dimethyl amino acetic acid betaine, coconut oil alkyl betaine, stearyl dimethyl amino acetic acid betaine, etc. These may be used alone or in combination of two or more.

[0035] The amidobetaine amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include lauric acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, palm kernel oil fatty acid amidopropyl betaine, etc. These may be used alone or in combination of two or more.

[0036] The sulfobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include lauryl hydroxysulfobetaine, lauramidopropyl hydroxysultaine, coconut oil fatty acid dimethylamino hydroxysulfobetaine, lauryl dimethylamino hydroxysulfobetaine, etc. These may be used alone or in combination of two or more.

[0037] The imidazoline-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium, N-coconut oil fatty acid acyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium, and 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, etc. These may be used alone or in combination of two or more.

[0038] Commercially available amphoteric surfactants include, for example, alkyl betaine amphoteric surfactants such as Amphitol (registered trademark) 24B (lauryl dimethylaminoacetic acid betaine, manufactured by Kao Corporation), Nissan Anon (registered trademark) BL (lauryl dimethylaminoacetic acid betaine, manufactured by NOF Corporation), NIKKOL (registered trademark) AM-301 (lauryl dimethylaminoacetic acid betaine, manufactured by Nikko Chemicals Co., Ltd.), Amogene (registered trademark) S (lauryl dimethylaminoacetic acid betaine, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), and Amogene SH (lauryl dimethylaminoacetic acid betaine, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.); Energicol (registered trademark) L-30B (lauric acid amidopropyl betaine, manufactured by Lion Specialty Chemicals Co., Ltd.), Nissan Anon (registered trademark) BDF-SF (coconut oil fatty acid amidopropyl betaine, manufactured by NOF Corporation), and Obazoline (registered trademark). Examples of such surfactants include amidobetaine-type amphoteric surfactants such as CAG-30 (coconut oil fatty acid amidopropyl betaine, manufactured by Toho Chemical Industry Co., Ltd.); sulfobetaine-type amphoteric surfactants such as Amphitol (registered trademark) 20HD (lauryl hydroxysulfobetaine, manufactured by Kao Corporation) and Softazoline (registered trademark) LSB (lauramidopropyl hydroxysultaine, manufactured by Kawaken Fine Chemicals Co., Ltd.); and imidazoline-type amphoteric surfactants such as NIKKOL (registered trademark) AM-101 (2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, manufactured by Nikko Chemicals Co., Ltd.) and Nissan Anon (registered trademark) GLM-R-LV (2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, manufactured by NOF Corporation).

[0039] In addition to the above-mentioned amphoteric surfactants, alkylamine oxide compounds can also be used.

[0040] The alkylamine oxide compound is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include alkyldimethylamine oxide and dihydroxyethyllaurylamine oxide.

[0041] Examples of alkyl dimethyl amine oxides include lauryl dimethyl amine oxide, myristyl dimethyl amine oxide, coconut alkyl dimethyl amine oxide, and oleyl dimethyl amine oxide. These may be used alone or in combination of two or more.

[0042] <<Nonionic surfactants>> The nonionic surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, polyglycerin fatty acid esters, sucrose fatty acid esters, alkyl polyglycosides, polyoxyethylene polyoxypropylene glycols, and polyoxyethylene hydrogenated castor oil, such as component (D).

[0043] The component (D) is not particularly limited and can be appropriately selected depending on the purpose. From the viewpoint of improving the tensile strength of hair after drying and suppressing frizz in a high-humidity environment, preferred are polyoxyethylene phytosterols having an average number of added moles of ethylene oxide of 10 to 40, and branched polyoxyethylene alkyl ethers having a carbon number of 16 to 20 and an average number of added moles of ethylene oxide of 10 to 40, and more preferred are polyoxyethylene phytosterols having an average number of added moles of ethylene oxide of 15 to 35, and branched polyoxyethylene alkyl ethers having a carbon number of 17 to 19 and an average number of added moles of ethylene oxide of 15 to 35.

[0044] Specific examples of branched polyoxyethylene alkyl ethers having 16 or more and 20 or less carbon atoms and an average number of moles of ethylene oxide added of 10 or more and 40 or less include polyoxyethylene isostearyl alcohol (average number of moles of ethylene oxide added of 10 to 40), polyoxyethylene 2-hexyldecyl ether (average number of moles of ethylene oxide added of 10 to 40), and polyoxyethylene octyldodecyl ether (average number of moles of ethylene oxide added of 10 to 40).

[0045] A specific example of a branched polyoxyethylene alkyl ether having 17 or more and 19 or less carbon atoms and an average number of moles of ethylene oxide added of 15 or more and 35 or less includes polyoxyethylene isostearyl alcohol (average number of moles of ethylene oxide added of 15 to 35).

[0046] Examples of commercially available products of component (D) include EMALEX (registered trademark) PS-30 (polyoxyethylene phytosterol, average number of moles of ethylene oxide added: 30, manufactured by Nippon Emulsion Co., Ltd.), NIKKOL (registered trademark) BPS-30 (polyoxyethylene phytosterol, average number of moles of ethylene oxide added: 30, manufactured by Nikko Chemicals Co., Ltd.), and EMALEX (registered trademark) 1820 (polyoxyethylene isostearyl alcohol, average number of moles of ethylene oxide added: 20, manufactured by Nippon Emulsion Co., Ltd.).

[0047] <<Fatty acids>> The fatty acids are not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include higher fatty acids having 10 to 22 carbon atoms.

[0048] The higher fatty acid having from 10 to 22 carbon atoms is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of achieving a good effect of suppressing hair frizz after drying with a hair dryer and in a high humidity environment, a higher fatty acid having from 12 to 18 carbon atoms is preferred, and a branched higher fatty acid having from 12 to 18 carbon atoms is more preferred. These may be used alone or in combination of two or more types.

[0049] Examples of higher fatty acids having 12 to 18 carbon atoms include lauric acid, myristic acid, palmitic acid, oleic acid, stearic acid, and isostearic acid.

[0050] Examples of branched higher fatty acids having 12 to 18 carbon atoms include isostearic acid.

[0051] The higher fatty acid having 10 to 22 carbon atoms may be appropriately synthesized or may be a commercially available product. Examples of commercially available higher fatty acids having 10 to 22 carbon atoms include, by trade name, Lauric Acid P (manufactured by New Japan Chemical Co., Ltd.), Myristic Acid (manufactured by New Japan Chemical Co., Ltd.), Palmitic Acid P (manufactured by New Japan Chemical Co., Ltd.), Oleic Acid D-100 (manufactured by New Japan Chemical Co., Ltd.), Stearic Acid C1870 (manufactured by New Japan Chemical Co., Ltd.), and Isostearic Acid EX (manufactured by Kokyu Alcohol Kogyo Co., Ltd.).

[0052] <<Oil>> The oil agent is not particularly limited and can be appropriately selected depending on the purpose. Examples include vegetable oils and fats such as castor oil, olive oil, cacao oil, hardened palm oil, camellia oil, coconut oil, Japan wax, jojoba oil, grapeseed oil, and avocado oil, and ester compounds thereof; animal oils and fats such as mink oil and egg yolk oil; waxes such as beeswax, spermaceti, lanolin, hydrogenated lanolin, carnauba wax, and candelilla wax; hydrocarbons such as liquid paraffin, squalane, microcrystalline wax, ceresin wax, paraffin wax, and petrolatum; natural and synthetic fatty acids such as oleic acid, isostearic acid, and behenic acid; and esters such as glycerol tri-2-ethylhexanoate, 2-ethylhexyl stearate, butyl stearate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, octyldodecyl oleate, and cholesterol oleate. These may be used alone or in combination of two or more.

[0053] <<Higher alcohol>> The alcohols are not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include natural and synthetic higher alcohols such as cetyl alcohol, oleyl alcohol, stearyl alcohol, hexyldecanol, octyldodecanol, and lauryl alcohol. These may be used alone or in combination of two or more.

[0054] <<Moisturizer>> There are no particular restrictions on the humectant, and it can be appropriately selected according to the purpose. For example, isoprene glycol, 1,2-pentanediol, diethylene glycol, diethylene glycol monoalkyl ether, polypropylene glycol, hydrogenated castor oil (30 E.O.), diglycerin, triglycerin, and polyglycerin can be mentioned. These may be used alone or in combination of two or more.

[0055] Examples of commercially available products of the humectant include, for example, under the trade name, Isoprene Glycol-S (manufactured by Kuraray Co., Ltd.).

[0056] <<Preservative>> There are no particular restrictions on the preservative, and it can be appropriately selected according to the purpose. For example, benzoate, sorbate, dehydroacetate, paraoxybenzoic acid ester, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, 3,4,4'-trichlorocarbanilide, benzalkonium chloride, hinokitiol, resorcin, methylchloroisothiazolinone·methylisothiazolinone solution (trade name: Kathon CG, manufactured by Rohm and Haas Japan Co., Ltd.), salicylic acid, pentanediol, phenoxyethanol, ethanol, etc. can be mentioned. These may be used alone or in combination of two or more.

[0057] <<Chelating agent>> There are no particular restrictions on the chelating agent, and it can be appropriately selected according to the purpose. For example, disodium edetate, ethylenediaminetetraacetate, hexametaphosphate, and gluconic acid can be mentioned. These may be used alone or in combination of two or more.

[0058] <<pH adjuster>> The pH adjuster is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include sodium hydroxide, potassium hydroxide, citric acid, succinic acid, triethanolamine, aqueous ammonia, triisopropanolamine, phosphoric acid, glycolic acid, etc. These may be used alone or in combination of two or more.

[0059] <<Vitamins>> The vitamins are not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include vitamin A, B vitamins, vitamin C, vitamin D, vitamin E, vitamin F, vitamin K, vitamin P, vitamin U, carnitine, ferulic acid, γ-oryzanol, α-lipoic acid, and orotic acid and its derivatives. These may be used alone or in combination of two or more.

[0060] <<Fragrances other than ingredient (C)>> The fragrance other than component (C) is not particularly limited and can be selected appropriately depending on the purpose. For example, fragrance compositions A to D described in paragraphs

[0065] to

[0071] of JP 2002-128658 A, fragrance compositions A to E described in paragraphs

[0076] to

[0088] of JP 2003-73249 A, or blended fragrance compositions 1 to 4 described in paragraphs

[0016] to

[0023] of JP 2020-132680 A can be used.

[0061] <ph> The pH (25°C) of the hair cosmetic composition is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of stability, it is preferably from 2 to 8, more preferably from 3 to 6. The pH can be measured in accordance with the pH measurement method in the general testing method of the Quasi-drug Raw Materials Standards.

[0062] The pH of the hair cosmetic composition can be adjusted by adding a pH adjuster such as citric acid while checking the pH after mixing all the ingredients. More specifically, the mixture is mixed and stirred so that the total of the ingredients other than the pH adjuster such as citric acid is approximately 98% by mass, with purified water as the balance. If necessary, the mixture may be heated. During mixing and stirring, an aqueous solution of the pH adjuster such as citric acid is gradually added, measuring the pH of each addition until the target pH is reached. Once the target pH is reached, the remaining purified water is added to bring the total to 100% by mass.

[0063] <Viscosity> The viscosity (25°C) of the hair cosmetic composition is not particularly limited and can be selected appropriately depending on the purpose, but from the viewpoint of usability, it is preferably from 10 mPa·s to 1,500 mPa·s, and more preferably from 200 mPa·s to 1,200 mPa·s. The viscosity can be measured at 25°C in accordance with Method 2 of the Viscosity Measurement Methods in the General Testing Methods of the Japan External Trade Organization.

[0064] <Manufacturing method> The method for producing the hair cosmetic composition is not particularly limited and can be appropriately selected depending on the purpose, and can be prepared, for example, by mixing component (A), component (B), component (C), and other components. Specifically, the hair cosmetic composition can be obtained by mixing and dissolving water-soluble components including component (B) and other components in a water bath at 70°C to form an aqueous phase, uniformly mixing component (A) and component (C) into this aqueous phase, and then cooling to room temperature while stirring.

[0065] The device for preparing the hair cosmetic composition is not particularly limited and can be appropriately selected depending on the purpose. For example, a stirring device equipped with multiple stirring blades (propeller, turbine, disperser, etc.) capable of shearing and total mixing can be used.

[0066] <Application> The hair cosmetic composition of the present embodiment is suitably used as a hair treatment agent such as a shampoo, a rinse-off hair serum, a leave-in hair serum, a rinse-off treatment, a leave-in treatment, a rinse-off conditioner, a leave-in conditioner, or a rinse-off hair mask, with a rinse-off hair serum and a leave-in hair serum being more preferred. [Example]

[0067] The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples. The content of each component described in the examples and comparative examples is shown in "% by mass", the total amount is 100% by mass, and all values ​​are converted to pure contents.

[0068] (Examples 1 to 21 and Comparative Example 1) For Examples 1 to 21 and Comparative Example 1, hair cosmetic compositions having the compositions and contents shown in Tables 1 to 4 were prepared according to the following method. Specifically, water and component (B) were mixed and dissolved in a 70°C water bath, component (A) and polyoxyethylene phytosterol were mixed uniformly, and then the mixture was cooled to room temperature with stirring, and component (C) was added. The components were mixed by stirring using a propeller as a stirring blade and a Three-One Motor (HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.). The pH was 4 to 4.8.

[0069] The obtained hair cosmetic compositions of Examples 1 to 21 and Comparative Example 1 were evaluated and judged as follows for "effect of inhibiting discoloration of the hair cosmetic composition," "hair softness," and "effect of inhibiting frizziness of hair after drying with a hair dryer." The results are shown in Tables 1 to 4 below.

[0070] <Evaluation of the discoloration-inhibiting effect of hair cosmetic compositions> 30 g of each hair cosmetic composition was filled into a 50 mL glass vial and exposed to an ultraviolet ray radiator for 72 hours or more, after which the appearance was observed. Any composition that showed any visible discoloration was transferred to a milky translucent container and evaluated according to the following criteria. -Judgment criteria- ◎: No visible discoloration even when filled in a glass vial 〇: Discoloration can be seen visually when filled in a glass vial, but when transferred to a semi-transparent container, discoloration cannot be seen visually. ×: Discoloration is visible both when filled in a glass vial and when transferred to a semi-transparent container.

[0071] <Evaluation of hair flexibility> 1 g of the sample (hair cosmetic composition) was applied to a 30 cm strand of hair (10 g) that had been dyed with a commercially available bleach, combed through 60 times, rinsed for 20 seconds, lightly drained, and air-dried at 25°C and 40% RH. Three expert panelists evaluated the results based on the following criteria: -Judgment criteria- ◎: Hair is much softer after drying than untreated sample hair 〇: Hair is softer after drying than the untreated sample hair △: Hair is slightly softer after drying than untreated sample hair ×: The softness of the hair after drying is the same as that of untreated sample hair

[0072] <Evaluation of the effect of preventing hair from frizzing after drying with a hair dryer> A 10g, 30cm bundle of hair dyed with commercially available bleach was washed with 1g of 27% AES (polyoxyethylene alkyl ether sulfate), air-dried at 25°C, 40% RH, combed three times, and the width of the bundle measured at 25cm from the root, which was used as the initial value. 1g of the sample was applied to the same bundle, combed 60 times, rinsed for 20 seconds, lightly drained, and dried with a hair dryer 20cm away, running fingers through the hair once every 2 seconds. After drying, the bundle was left at 25°C, 40% RH for 2 hours, combed three times, and the width of the bundle measured at 25cm from the root. -Evaluation criteria- ◎: Hair bundle width is less than 90% of the initial value ○: Hair bundle width is 90% or more but less than 95% of the initial value △: Hair bundle width is 95% or more but less than 100% of the initial value ×: Hair bundle width is 100% or more of the initial value

[0073] [Table 1]

[0074] [Table 2]

[0075] [Table 3]

[0076] [Table 4]

[0077] (Prescription Examples 1-13) Hair cosmetic compositions (hair serums) of Formulation Examples 1 to 13 having the compositions and contents shown in Tables 5 and 6 below were prepared in the same manner as in Example 1.

[0078] [Table 5]

[0079] [Table 6]

[0080] Although all of the requirements of the present invention are essential for solving the problems of the present invention with the solutions of the present invention, the description in this specification does not suggest that the requirements of the present invention are essential for solving problems other than the problems of the present invention or for solving the problems of the present invention with solutions other than the solutions of the present invention. For example, the description in this specification does not deny that a hair cosmetic composition that "excludes" any of the requirements of the present invention described in the claims solves problems other than the problems of the present invention or solves the problems of the present invention with solutions other than the solutions of the present invention. [Industrial Applicability]

[0081] The hair cosmetic composition according to this embodiment can suppress discoloration caused by the ingredients in the composition and can also impart softness to the hair, and therefore can be suitably used in hair treatments such as shampoo, rinse-off hair serum, leave-in hair serum, rinse-off treatment, leave-in treatment, rinse-off conditioner, leave-in conditioner, and rinse-off hair mask.< / ph>

Claims

1. (A) A hair cosmetic composition containing a cationic surfactant.

2. (B) an amino acid or a salt thereof; The hair cosmetic composition according to claim 1, further comprising (C) a ketone-based fragrance.