Hair cosmetic composition

Abstract

To provide a hair cosmetic composition that is excellent at suppressing hair frizz when a lot of moisture enters and leaves the hair. [Solution] (A) Isoprene glycol and (B) Higher fatty acids with 10 to 22 carbon atoms, (C) A hair cosmetic composition containing an amino acid or a salt thereof, The hair cosmetic composition is characterized in that the content of component (A) is 20% by mass or more and 60% by mass or less based on the total amount of the hair cosmetic composition.

Description

Technical Field

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

Background Art

[0002] Hair is damaged by chemical treatments such as hair coloring and bleaching, physical treatments such as combing, and heat from dryers and hair irons. As a result, not only does the cuticle on the hair surface peel off, but the constituent components of the hair (such as proteins, amino acids, and lipids) elute, and the localization of hydrophobic and hydrophilic substances inside the hair becomes non-uniform. It is known that when the balance between hydrophobic and hydrophilic substances inside the hair is disrupted, when moisture enters and exits frequently, such as after drying with a dryer or in a high-humidity environment, the localization of moisture inside the hair becomes more non-uniform, resulting in problems such as hair curling and the hair spreading out and becoming difficult to gather.

[0003] Conventionally, as one means to solve such problems, compositions have been proposed that contain cationic polymers with high adsorptivity to the hair surface and oil agents such as highly polymerized and amino-modified silicones in shampoos and conditioners used in the bath and treatments used outside the bath (see, for example, Patent Documents 1 and 2). However, in conventional hair cosmetic compositions including the compositions described in Patent Documents 1 and 2, the effect of suppressing hair spreading when moisture enters and exits frequently is not sufficient, and there is room for improvement.

[0004] Therefore, a hair cosmetic composition having an excellent effect of suppressing hair spreading when moisture enters and exits frequently has not yet been provided, and there is an urgent need for its prompt development.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] The present invention aims to solve the aforementioned problems of the conventional approach and achieve the following objective: to provide a hair cosmetic composition that is excellent at suppressing hair frizz when a large amount of moisture enters and leaves the hair. [Means for solving the problem]

[0007] As a result of diligent research to achieve the above objective, the present inventors have found that the hair cosmetic composition of the present invention is a hair cosmetic composition containing (A) isoprene glycol, (B) a higher fatty acid having 10 to 22 carbon atoms, and (C) an amino acid or a salt thereof, wherein the content of component (A) is 20% by mass or more and 60% by mass or less of the total amount of the hair cosmetic composition, thereby obtaining a hair cosmetic composition that is excellent in suppressing hair spreading when a lot of moisture enters and leaves the hair.

[0008] The present invention is based on the aforementioned findings by the inventors, and the means for solving the aforementioned problems are as follows. <1> (A) Isoprene glycol and (B) Higher fatty acids with 10 to 22 carbon atoms, (C) A hair cosmetic composition containing an amino acid or a salt thereof, The hair cosmetic composition is characterized in that the content of component (A) is 20% by mass or more and 60% by mass or less based on the total amount of the hair cosmetic composition. <2> The mass ratio of the content of component (B) to the content of component (C) [(B) / (C)] is 2.5 or more and 5 or less. <1> This is the hair cosmetic composition described in [the relevant document]. <3> The content of component (B) is 0.3% by mass or more and 3% by mass or less based on the total amount of the hair cosmetic composition. The content of component (C) is 0.3% by mass or more and 1.5% by mass or less based on the total amount of the hair cosmetic composition. <1> or <2> This is the hair cosmetic composition described in [the relevant document]. <4> It's a rinse-off type. <1> from <3> It is a hair cosmetic composition as described in any of the above. [Effects of the Invention]

[0009] According to the present invention, it is possible to solve the aforementioned problems in the conventional method, achieve the aforementioned objectives, and provide a hair cosmetic composition that is excellent in suppressing hair spreading when a large amount of moisture enters and leaves the hair. [Modes for carrying out the invention]

[0010] (Hair cosmetic composition) The hair cosmetic composition according to the present invention contains (A) isoprene glycol, (B) a higher fatty acid having 10 to 22 carbon atoms, and (C) an amino acid or a salt thereof, and may optionally contain other components.

[0011] In this specification, (A) isoprene glycol may be referred to as "component (A)", (B) higher fatty acids having 10 to 22 carbon atoms may be referred to as "component (B)", and (C) amino acids or salts thereof may be referred to as "component (C)".

[0012] <(A) Isoprene glycol> The aforementioned component (A) is included in the hair cosmetic composition to provide an effect of suppressing hair frizz after drying with a hairdryer, and an effect of suppressing hair frizz in a high-humidity environment.

[0013] The isoprene glycol in component (A) may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available isoprene glycols include Isoprene Glycol-S (manufactured by Kuraray Co., Ltd.), which is sold under the trade name.

[0014] The content of the component (A) is 20% by mass or more and 60% by mass or less, preferably 30% by mass or more and 50% by mass or less, based on the total amount of the hair cosmetic composition, from the viewpoint of achieving good effects of suppressing the spreading of hair in a high-humidity environment and suppressing the spreading of hair after drying with a dryer.

[0015] When the content of the component (A) is 20% by mass or more based on the total amount of the hair cosmetic composition, good effects of suppressing the spreading of hair after drying with a dryer and suppressing the spreading of hair in a high-humidity environment can be achieved.

[0016] When the content of the component (A) is 60% by mass or less based on the total amount of the hair cosmetic composition, a good effect of suppressing the spreading of hair after drying with a dryer can be achieved.

[0017] <(B) Higher fatty acid having 10 to 22 carbon atoms> The component (B) is contained in the hair cosmetic composition to impart an effect of suppressing the spreading of hair in a high-humidity environment.

[0018] There is no particular limitation on the component (B), and it can be appropriately selected according to the purpose. From the viewpoint of achieving good effects of suppressing the spreading of hair after drying with a dryer and suppressing the spreading of hair in a high-humidity environment, higher fatty acids having 12 to 18 carbon atoms are preferable, and branched higher fatty acids having 12 to 18 carbon atoms are more preferable. These may be used alone or in combination of two or more.

[0019] Examples of the higher fatty acids having 12 to 18 carbon atoms include lauric acid, myristic acid, palmitic acid, oleic acid, stearic acid, and isostearic acid.

[0020] Examples of the branched higher fatty acids having 12 to 18 carbon atoms include isostearic acid.

[0021] <00001The aforementioned component (B) may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available products of component (B) include, by trade name, Lauric Acid P (manufactured by Shin-Nippon Rika Co., Ltd.), Myristic Acid (manufactured by Shin-Nippon Rika Co., Ltd.), Palmitic Acid P (manufactured by Shin-Nippon Rika Co., Ltd.), Oleic Acid D-100 (manufactured by Shin-Nippon Rika Co., Ltd.), Stearic Acid C1870 (manufactured by Shin-Nippon Rika Co., Ltd.), and Isostearic Acid EX (manufactured by Higher Alcohol Industry Co., Ltd.).

[0022] There are no particular restrictions on the content of component (B) and it can be appropriately selected depending on the purpose, but from the viewpoint of having a good effect in suppressing hair frizz after drying with a hairdryer and in suppressing hair frizz in a high humidity environment, it is preferable that the content is 0.1% by mass or more and 5% by mass or less, and more preferably 0.3% by mass or more and 3% by mass or less, based on the total amount of the hair cosmetic composition.

[0023] When the content of component (B) is 0.1% by mass or more relative to the total amount of the hair cosmetic composition, the effect of suppressing hair frizz in a high-humidity environment is good.

[0024] When the content of component (B) is 5% by mass or less of the total amount of the hair cosmetic composition, the effect of suppressing hair frizz in a high humidity environment is good.

[0025] <(C) Amino acids or their salts> The aforementioned component (C) is included in the hair cosmetic composition to provide an effect of suppressing hair frizz after blow-drying.

[0026] There are no particular restrictions on the aforementioned (C) component, and it can be appropriately selected depending on the purpose. However, from the viewpoint of having a good effect in suppressing hair frizz after blow-drying, neutral amino acids or their salts, acidic amino acids or their salts, and basic amino acids or their salts are preferred, and neutral amino acids or their salts are more preferred. These can be used individually or in combination of two or more.

[0027] Examples of the neutral amino acid or its salt include glycine and serine.

[0028] Examples of the aforementioned acidic amino acids or their salts include glutamic acid and sodium glutamate.

[0029] Examples of the basic amino acids or their salts include arginine, histidine, arginine hydrochloride, and histidine hydrochloride.

[0030] The aforementioned component (C) may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available products of component (C) include, by trade name, glycine (manufactured by Nippon Rikagaku Yakuhin Co., Ltd.), L-serine (manufactured by Nippon Rikagaku Yakuhin 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 Yakuhin Co., Ltd.).

[0031] There are no particular restrictions on the content of component (C) and it can be appropriately selected depending on the purpose, but from the viewpoint of having a good effect in suppressing hair frizz after blow-drying, it is preferable that it be 0.1% by mass or more and 3% by mass or less, and more preferably 0.3% by mass or more and 1.5% by mass or less.

[0032] When the content of component (C) is 0.1% by mass or more relative to the total amount of the hair cosmetic composition, the effect of suppressing hair frizz after drying with a hairdryer is good.

[0033] When the content of component (C) is 3% by mass or less relative to the total amount of the hair cosmetic composition, the effect of suppressing hair frizz after drying with a hairdryer is good.

[0034] <Mass ratio [(B) / (C)]> There are no particular restrictions on the mass ratio of the content of component (B) to the content of component (C) [(B) / (C)], and it can be appropriately selected according to the purpose. However, from the viewpoint of having a good effect in suppressing hair frizz in a high humidity environment and a good effect in suppressing hair frizz after drying with a hairdryer, a ratio of 0.2 to 10 is preferred, and a ratio of 2.5 to 5 is more preferred.

[0035] When the mass ratio [(B) / (C)] is 0.2 or higher, the effect of suppressing hair frizz in a high-humidity environment and the effect of suppressing hair frizz after drying with a hairdryer are good.

[0036] When the mass ratio [(B) / (C)] is 5 or less, the effect of suppressing hair frizz after blow-drying is good.

[0037] <Other ingredients> In addition to the components (A) to (C) described above, the hair cosmetic composition according to the present invention may contain other components as long as they do not impair the effects of the present invention.

[0038] The aforementioned other components are not particularly limited and can be appropriately selected according to the purpose. Examples include surfactants, lower alcohols, higher alcohols, fatty acids other than those listed in (B), oils, silicones, humectants such as polyhydric alcohols and sugar alcohols, thickeners, gelling agents, powders, water-soluble polymers, film-forming agents, resins, UV absorbers, antibacterial agents, fragrances, pigments, opacifiers, preservatives other than those listed in (A), deodorants, salts, pH adjusters, cooling agents, animal and microbial extracts, plant extracts, blood circulation promoters, astringents, anti-dandruff agents, anti-seborrheic agents, whitening agents, anti-inflammatory agents, cell activators, chelating agents, keratolytic agents, enzymes, hormones, and vitamins. These can be used individually or in combination of two or more.

[0039] The content of the other components mentioned above is not particularly limited, as long as it does not impair the effects of the present invention, and can be set as appropriate depending on the purpose.

[0040] The other components mentioned above may be synthesized as appropriate, or commercially available products may be used.

[0041] <<Surfactants>> Examples of the aforementioned surfactants include anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants.

[0042] <<<Cational surfactants>>> The cationic surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples include alkylamine salts, fatty acid amideamine salts, alkyltrimethylammonium salts, dialkyldimethylammonium salts, and alkyldimethylbenzylammonium salts.

[0043] <<<Amphoteric surfactants>>> The aforementioned 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 can be used individually or in combination of two or more.

[0044] The betaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples include alkylbetaine-type amphoteric surfactants, amidebetaine-type amphoteric surfactants, sulfobetaine-type amphoteric surfactants, and imidazoline-type amphoteric surfactants. These may be used individually or in combination of two or more types.

[0045] The alkylbetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples include lauryldimethylaminoacetic acid betaine, coconut oil alkyl betaine, and stearyldimethylaminoacetic acid betaine. These can be used individually or in combination of two or more.

[0046] The aforementioned amidobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples include lauric acid amidopropyl betaine, coconut oil fatty acid amidopropyl betaine, and palm kernel oil fatty acid amidopropyl betaine. These can be used individually or in combination of two or more.

[0047] The sulfobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples include lauryl hydroxysulfobetaine, lauramidopropyl hydroxysultaine, coconut oil fatty acid dimethylamino hydroxysulfobetaine, and lauryl dimethylamino hydroxysulfobetaine. These can be used individually or in combination of two or more.

[0048] The imidazoline-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples include sodium N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine, sodium N-coconut oil fatty acid acyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine, and 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine. These can be used individually or in combination of two or more.

[0049] Among these amphoteric surfactants, amide betaine-type amphoteric surfactants and alkyl betaine-type amphoteric surfactants are preferred, lauric acid amidopropyl betaine and lauryldimethylaminoacetic acid betaine are more preferred, and lauric acid amidopropyl betaine is even more preferred.

[0050] The aforementioned amphoteric surfactant may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available amphoteric surfactants include, for example, alkyl betaine-type amphoteric surfactants such as Amhitol 24B (lauryldimethylaminoacetic acid betaine, manufactured by Kao Corporation), Nissan Anon® BL (lauryldimethylaminoacetic acid betaine, manufactured by NOF Corporation), NIKKOL AM-301 (lauryldimethylaminoacetic acid betaine, manufactured by Nikko Chemicals Co., Ltd.), Amogen® S (lauryldimethylaminoacetic acid betaine, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), and Amogen SH (lauryldimethylaminoacetic acid betaine, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.); amide betaine-type amphoteric surfactants such as Enerdicol L-30B (lauric acid amidopropyl betaine, manufactured by Lion Specialty Chemicals Corporation), Nissan Anon BDF-SF (coconut oil fatty acid amidopropyl betaine, manufactured by NOF Corporation), and Obazolin CAG-30 (coconut oil fatty acid amidopropyl betaine, manufactured by Toho Chemical Industry Co., Ltd.); and Amhitol Examples include sulfobetaine-type amphoteric surfactants such as 20HD (lauryl hydroxysulfobetaine, manufactured by Kao Corporation) and softazoline LSB (lauramidopropyl hydroxysultaine, manufactured by Kawaken Fine Chemicals Co., Ltd.); and imidazoline-type amphoteric surfactants such as NIKKOL AM-101 (2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, manufactured by Nikko Chemicals Co., Ltd.) and Nissan Anon GLM-R-LV (2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, manufactured by NOF Corporation).

[0051] In addition to those mentioned above, alkylamine oxide compounds can also be used as the aforementioned amphoteric surfactant.

[0052] The alkylamine oxide compound is not particularly limited and can be appropriately selected depending on the purpose. Examples include alkyldimethylamine oxide and dihydroxyethyl laurylamine oxide.

[0053] Examples of the alkyldimethylamine oxide include lauryldimethylamine oxide, myristyldimethylamine oxide, coconut alkyldimethylamine oxide, and oleyldimethylamine oxide. Among these, lauryldimethylamine oxide is preferred. These may be used individually or in combination of two or more types.

[0054] <<<Nonionic surfactant>>> The nonionic surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples 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 glycol, and polyoxyethylene hydrogenated castor oil.

[0055] <<Oil-based ingredients>> The aforementioned oils are not particularly limited and can be appropriately selected according to the purpose. Examples include vegetable oils and fats such as castor oil, olive oil, cocoa oil, hydrogenated palm oil, camellia oil, coconut oil, wood wax, jojoba oil, grapeseed oil, and avocado oil, and their ester compounds; animal oils and fats such as mink oil and egg yolk oil; waxes such as beeswax, whale wax, 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 can be used individually or in combination of two or more.

[0056] <<High-grade alcohol>> There are no particular restrictions on the alcohols mentioned above, and they can be appropriately selected depending on the purpose. Examples include natural and synthetic higher alcohols such as cetyl alcohol, oleyl alcohol, stearyl alcohol, hexyldecanol, octyldodecanol, and lauryl alcohol. These can be used individually or in combination of two or more.

[0057] <<Moisturizer>> The aforementioned humectant is not particularly limited and can be appropriately selected depending on the purpose. Examples include isoprene glycol, 1,2-pentanediol, diethylene glycol, diethylene glycol monoalkyl ether, polypropylene glycol, polypropylene glycol, hydrogenated castor oil (30 E.O.), diglycerin, triglycerin, and polyglycerin. These can be used individually or in combination of two or more.

[0058] <<(A) Preservatives other than ingredient>> Other preservatives besides component (A) mentioned above are not particularly limited and can be appropriately selected depending on the purpose. Examples include benzoates, sorbates, dehydroacetates, parahydroxybenzoates, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, 3,4,4'-trichlorocarbanilide, benzalkonium chloride, hinokitiol, resorcinol, methylchloroisothiazolinone / methylisothiazolinone solution (product name: Kayson CG, manufactured by Rohm & Haas Japan), salicylic acid, pentanediol, phenoxyethanol, and ethanol. These can be used individually or in combination of two or more.

[0059] <<Chelating agent>> The chelating agent is not particularly limited and can be appropriately selected according to the purpose. For example, disodium edetate, ethylenediaminetetraacetate, hexametaphosphate, gluconic acid, and the like can be mentioned. These may be used alone or in combination of two or more.

[0060] <<pH adjuster>> The pH adjuster is not particularly limited and can be appropriately selected according to the purpose. For example, sodium hydroxide, potassium hydroxide, citric acid, succinic acid, triethanolamine, aqueous ammonia, triisopropanolamine, phosphoric acid, glycolic acid, and the like can be mentioned. These may be used alone or in combination of two or more.

[0061] <<Vitamins>> The vitamins are not particularly limited and can be appropriately selected according to the purpose. For example, vitamin A, vitamin B group, 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 can be mentioned. These may be used alone or in combination of two or more.

[0062] <<Fragrance>> The fragrance is not particularly limited and can be appropriately selected according to the purpose. For example, fragrance compositions A to D described in paragraphs

[0065] to

[0071] of JP-A No. 2002-128658, fragrance compositions A to E described in paragraphs

[0076] to

[0088] of JP-A No. 2003-73249, or compounded fragrance compositions 1 to 4 described in paragraphs

[0016] to

[0023] of JP-A No. 2020-132680 can be used.

[0063] [pH] The pH (25°C) of the hair cosmetic composition according to the present invention is not particularly limited and can be appropriately selected according to the purpose, but is preferably 2 or more and 8 or less, and more preferably Furthermore, pH can be measured in accordance with the pH measurement method of the General Test Methods of the Japanese Standards for Quasi-Drug Ingredients (JASDAQ).

[0064] The pH of the aforementioned hair cosmetic composition can be adjusted by adding a pH adjuster such as citric acid after mixing all the components, while checking the pH. More specifically, the components other than the pH adjuster such as citric acid are mixed and stirred with purified water as a balance so that the total amount of these components is approximately 98% by mass. Heating may be added if necessary. While mixing and stirring, an aqueous solution of the pH adjuster such as citric acid is gradually added, and the pH of each component is measured as it is added until the target pH is reached. Once the target pH is reached, the remaining purified water is added last to bring the total amount of water to 100% by mass.

[0065] [viscosity] The viscosity (at 25°C) of the hair cosmetic composition according to the present invention is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of usability, it is preferably 10 mPs·s or more and 1,500 mPa·s or less, and more preferably 200 mPs·s or more and 1,200 mPs·s or less. Viscosity can be measured at 25°C in accordance with Method 2 of the General Test Method for Viscosity Measurement in the External Standards for Standardization of Viscosity.

[0066] <Method for producing hair cosmetic composition> There are no particular limitations on the method for producing the hair cosmetic composition, and it can be appropriately selected depending on the purpose. For example, it can be prepared by mixing components (A) to (C) and the other components. Specifically, a water-soluble component containing component (C) and the other components can be mixed and dissolved in a 70°C water bath to form an aqueous phase. After uniformly mixing component (A) and component (B) into this aqueous phase, the hair cosmetic composition can be obtained by cooling to room temperature while stirring.

[0067] There are no particular limitations on the apparatus for preparing the hair cosmetic composition, and an appropriate apparatus can be selected depending on the purpose. For example, an agitator equipped with multiple stirring blades (propellers, turbines, dispersers, etc.) capable of shearing and overall mixing can be used.

[0068] [Application] The hair cosmetic composition according to the present invention is suitably used as a hair treatment agent, for example, in the form of hair serum, water treatment, hair mist, hair rinse, hair conditioner, hair treatment, hair pack, and hair spray. The hair cosmetic composition according to the present invention may be a rinse-off type or a leave-in type, but it is preferably a rinse-off type. [Examples]

[0069] The present invention will be described in more detail below based on examples and comparative examples, but the present invention is not limited to these examples. Furthermore, the content of each component described in the examples and comparative examples is shown in "mass%", and all values ​​are calculated on a pure content basis.

[0070] (Examples 1-29 and Comparative Examples 1-7) Hair cosmetic compositions with the compositions and contents shown in Tables 1 to 6 below were prepared by the following method. Specifically, water and component (C) were mixed and dissolved in a 70°C bath, and then component (A), component (B), and polyoxyethylene hydrogenated castor oil were uniformly mixed. After that, the mixture was cooled to room temperature while stirring, and the fragrance was added. The pH was 4 to 4.8. The mixing of each component was carried out by using a propeller as an agitator and stirring with a Three One Motor (HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.).

[0071] For each hair cosmetic composition obtained, the "effect of suppressing hair frizz after blow-drying" and the "effect of suppressing hair frizz in a high-humidity environment" were evaluated using the following methods.

[0072] [Method for evaluating the effect of suppressing hair frizz after blow-drying] A 30cm hair bundle (10g) was washed with 1g of 27% AES (polyoxyethylene alkyl ether sulfate), air-dried at 25°C and 40% RH, and the hair bundle width was measured 25cm from the roots to be used as the initial value. 1g of each hair cosmetic composition was applied to the same hair bundle, combed 60 times, rinsed for 20 seconds, lightly squeezed dry, and dried by running fingers through the hair once every 2 seconds while applying a hairdryer from a distance of 20cm. After drying, the hair bundle was combed 3 times and the hair bundle width 25cm from the roots was measured. The sample size was 3, and the average value was used as the measurement value. The effect of suppressing hair frizz after hairdryer drying was evaluated based on the following evaluation criteria. -Judgment 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] [Effect of suppressing hair frizz in high humidity environments] A 30cm hair bundle (10g) was washed with 1g of 27% AES (polyoxyethylene alkyl ether sulfate), air-dried at 25°C and 40% RH, and the hair bundle width at 25cm from the root was measured and used as the initial value. 1g of each hair cosmetic composition was applied to the same hair bundle, combed 60 times, rinsed for 20 seconds, lightly squeezed dry, and dried by running fingers through the hair once every 2 seconds while applying a hairdryer from a distance of 20cm. After drying, the hair bundle was left to stand at 20°C and 80% RH for 2 hours, combed 3 times, and the hair bundle width at 25cm from the root was measured. The sample size was 3, and the average value was used as the measurement value. The effect of suppressing hair frizz in a high-humidity environment was evaluated based on the following evaluation criteria. -Judgment 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

[0074] [Table 1]

[0075] [Table 2]

[0076] [Table 3]

[0077] [Table 4]

[0078] [Table 5]

[0079] [Table 6]

[0080] Details of each component used in Examples 1 to 29 and Comparative Examples 1 to 7 are shown in Table 7 below.

[0081] [Table 7] [Industrial applicability]

[0082] The hair cosmetic composition of the present invention is excellent at suppressing hair frizz when a large amount of moisture enters and leaves the hair, and is therefore suitable for use in hair treatment agents such as hair serums, water treatments, hair mists, hair rinses, hair conditioners, hair treatments, hair packs, and hair sprays.

Claims

1. (A) Isoprene glycol and (B) Higher fatty acids with 10 to 22 carbon atoms, (C) A hair cosmetic composition containing an amino acid or a salt thereof, A hair cosmetic composition characterized in that the content of component (A) is 20% by mass or more and 60% by mass or less based on the total amount of the hair cosmetic composition.

2. The hair cosmetic composition according to claim 1, wherein the mass ratio of the content of component (B) to the content of component (C) [(B) / (C)] is 2.5 or more and 5 or less.

3. The content of component (B) is 0.3% by mass or more and 3% by mass or less based on the total amount of the hair cosmetic composition. The hair cosmetic composition according to claim 1 or 2, wherein the content of component (C) is 0.3% by mass or more and 1.5% by mass or less based on the total amount of the hair cosmetic composition.

4. A hair cosmetic composition according to claim 1 or 2, which is of the rinse-off type.

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