Hair composition

Abstract

The present invention provides: a hair waviness care composition containing a cystine derivative; and a hair composition containing a cystine derivative, and hyaluronic acid or a derivative thereof and / or ascorbic acid or a derivative thereof.

Description

hair composition

[0001] This disclosure relates to a hair composition.

[0002] There is a demand for the ability to remove or add frizz to hair as desired. In response to this demand, research into hair compositions is underway.

[0003] For example, Patent Document 1 discloses a hair deformation treatment composition containing saponin, addressing issues such as providing a novel hair deformation treatment composition that can deform hair more easily.

[0004] Japanese Patent Publication No. 2024-1773

[0005] One aspect of this disclosure aims to provide a novel composition that can facilitate hair frizz control.

[0006] The present inventors have found that compositions containing cystine derivatives can facilitate hair frizz care. This disclosure provides, in several aspects, the following [1] to

[12] : [1] A hair frizz care composition comprising a cystine derivative. [2] The hair frizz care composition according to [1], which is used after being applied to hair and then heated. [3] A method for preventing heat damage to hair, comprising applying the hair frizz care composition according to [1] or [2] to hair and then heating the hair. [4] A method for imparting elasticity to hair, comprising applying the hair frizz care composition according to [1] or [2] to hair and then heating the hair. [5] A hair composition comprising a cystine derivative and at least one of hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof. [6] A hair composition comprising a cystine derivative, hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof. [7] A hair composition according to [5] or [6] for the care of frizz in hair. [8] A hair composition according to any one of [5] to [7] that is used after being applied to hair and then heated. [9] A method for preventing damage to hair by heating, comprising applying a hair composition according to any one of [5] to [8] to hair and then heating the hair.

[10] A method for imparting smoothness to the surface of hair, comprising applying a hair composition according to any one of [5] to [8] to hair and then heating the hair.

[11] A method for imparting elasticity to hair, comprising applying a hair composition according to [6] to [8] to hair and then heating the hair.

[12] A method for imparting suppleness to hair, comprising applying a hair composition according to [6] to [8] to hair and then heating the hair.

[0007] According to one aspect of this disclosure, a novel composition is provided that can make it easier to care for frizzy hair.

[0008] This is a photograph showing the results of a hair straightening test.

[0009] The embodiments of this disclosure will be described in detail below. However, this disclosure is not limited to the embodiments described below.

[0010] <First Embodiment> One embodiment of the present disclosure is a composition for hair wave care (hereinafter, also referred to as "Composition a") containing a cystine derivative. The cystine derivative may be, for example, a compound represented by the following formula (1).

[0011] In formula (1), R ５ ,

[0012] , , R ２ 、 R ３ , and R ４ each independently represents a hydrogen atom or a group represented by the following formula (2), and not all of R １ , R ２ 、 R ３ , and R ４ are simultaneously hydrogen atoms, and A １ and A ２ each independently represents -OH or -O － M (M represents the counter cation of -O － ).), and M represents a cation selected from the group consisting of Na ＋ , K ＋ , Mg ２＋ , Ca ２＋ , NH ４ ＋ , protonated alkanolamine, and protonated basic amino acid. However, when the compound represented by formula (1) contains one or more divalent ions as M, one or both of A １ and A ２ can be -O － . For example, A １ and A ２ may consist of two -O － and one M (for example, Mg ２＋ ). In this case, the compound represented by formula (1) may have an intramolecular bond or an intermolecular bond through the counter cation M.

[0012] In formula (2), m represents an integer of 0 or 1, n represents an integer of 1 or 2, and R ５R represents a C1-C3 linking group which may have branched and / or unsaturated bonds, X represents a sulfate ester (salt) group, a carboxylic acid (salt) group, a sulfonic acid (salt) group, or a hydroxyl group, and * represents a bond. ５ X may be a 2-3 carbon atom linking group which may have branched and / or unsaturated bonds, and X is preferably a carboxylic acid (salt) group.

[0013] A in equation (1) １ and A ２ Examples of protonated alkanolamines (alkanolammonium) as M in this context include protonated monoalkanolamines, protonated dialkanolamines, and protonated trialkanolamines. An example of a protonated monoalkanolamine is protonated monoethanolamine (HOCH). ２ CH ２ NH ３ ＋ Examples of protonated dialkanolamines include protonated diethanolamine ((HOCH)). ２ CH ２ ) ２ NH ２ ＋ Examples of protonated trialcanolamines include protonated triethanolamine ((HOCH ２ CH ２ ) ３ NH ＋ ) are some examples.

[0014] A in equation (1) １ and A ２ Examples of protonated basic amino acids as M in this context include protonated lysine and protonated arginine.

[0015] Examples of the group represented by formula (2) include the groups represented by the following formulas (3) to (14).

[0016] A in equations (3) to (7) and (9) to (14) ３ and A in equation (7) ４ These are, independently, -OH or -O － M (M is -O) －This shows the countercation of (where M is Na). ＋ _K ＋ Mg ２＋ Ca ２＋ NH ４ ＋ A represents a cation selected from the group consisting of protonated alkanolamines and protonated basic amino acids, and * represents a bond. However, if the compound represented by formula (1) contains one or more divalent ions as M, A is used so that the compound represented by formula (1) is electrically neutral. ３ and A ４ One or both of are -O － This is possible. In this case, the compound represented by formula (1) may have intramolecular or intermolecular bonds via the counter cation M.

[0017] A in equations (3) to (7) and (9) to (14) ３ and A in equation (7) ４ Examples of protonated monoethanolamine and protonated basic amino acids as M in formula (1) are A, respectively. １ and A ２ Examples of protonated monoethanolamines and protonated basic amino acids as M in the above-mentioned formula include those mentioned above.

[0018] The cystine derivative may be disuccinoylcystine tetrasodium. Disuccinoylcystine tetrasodium can be represented, for example, by the following formula (15).

[0019] Such cystine derivatives can be obtained, for example, by reacting cystine with a compound selected from the group consisting of dicarboxylic acid anhydrides, acid halides, alkylene oxides, and vinyl compounds (vinyl group-containing compounds), and introducing substituents derived from the compound. The cystine derivative may also be a composite of cystine and a dicarboxylic acid anhydride, acid halide, alkylene oxide, or vinyl compound (vinyl group-containing compound), or a salt thereof.

[0020] Examples of dicarboxylic acid anhydrides include maleic anhydride, succinic anhydride, glutaric anhydride, itaconic anhydride, and citraconic anhydride. An example of an acid halide is monochloroacetic acid. An example of an alkylene oxide is ethylene oxide. Examples of vinyl compounds (vinyl group-containing compounds) include vinylsulfonic acid, maleic acid, and acrylic acid.

[0021] For example, the group shown in formula (3) can be introduced into cystine by reacting it with maleic anhydride. The group shown in formula (4) can be introduced into cystine by reacting it with succinic anhydride. The group shown in formula (5) can be introduced into cystine by reacting it with glutaric anhydride. The group shown in formula (6) can be introduced into cystine by reacting it with vinyl sulfonic acid.

[0022] By reacting cystine with maleic acid, the group shown in formula (7) can be introduced into cystine. By reacting cystine with ethylene oxide, the group shown in formula (8) can be introduced into cystine. By reacting cystine with monochloroacetic acid, the group shown in formula (9) can be introduced into cystine. By reacting cystine with acrylic acid, the group shown in formula (10) can be introduced into cystine.

[0023] By reacting cystine with itaconic anhydride, the group represented by formula (11) or (12) above can be introduced into cystine. By reacting cystine with citraconic anhydride, the group represented by formula (13) or (14) above can be introduced into cystine.

[0024] The cystine derivative shown in formula (1) contains an ionizing hydrophilic group (e.g., a carboxylic acid group). Each cation (A １ M and A inside ２ M and A inside ３ M and A inside ４The M in the middle can be considered a countercation of the ionizing hydrophilic group, and may be determined by the component that neutralizes the cystine derivative.

[0025] By including a cystine derivative, composition a can more easily maintain the curls applied to the hair when used for hair frizz control, and can also more easily remove frizz. Furthermore, by including a cystine derivative, when composition a is applied to hair and heated, it can prevent damage to the hair due to heat and impart elasticity to the hair.

[0026] The content of the cystine derivative may be 0.001% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.08% by mass or more, 0.1% by mass or more, 0.3% by mass or more, or 0.5% by mass or more, based on the total mass of composition a, and may be 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, or 1% by mass or less.

[0027] Composition a may or may not contain hyaluronic acid or its derivatives. Details of the hyaluronic acid derivatives that may be included in composition a may be as described below as hyaluronic acid derivatives that may be included in composition b.

[0028] If composition a contains hyaluronic acid or a derivative thereof, the content of hyaluronic acid or a derivative thereof may be 0.0001% by mass or more, 0.001% by mass or more, 0.01% by mass or more, 0.05% by mass or more, or 0.08% by mass or more, based on the total mass of composition a, and may be 3% by mass or less, 1% by mass or less, 0.5% by mass or less, or 0.1% by mass or less. In this specification, the content of hyaluronic acid or a derivative thereof means the amount in terms of sodium hyaluronate.

[0029] Composition a may or may not contain ascorbic acid or its derivatives. Details of the ascorbic acid derivatives that may be included in composition a are as described below as the ascorbic acid derivatives that may be included in composition b.

[0030] If composition a contains ascorbic acid or a derivative thereof, the content of ascorbic acid or a derivative thereof may be 0.0001% by mass or more, 0.001% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.08% by mass or more, or 0.1% by mass or more, based on the total mass of composition a, and may be 10% by mass or less, 5% by mass or less, 3% by mass or less, 1% by mass or less, 0.5% by mass or less, or 0.1% by mass or less. In this specification, the content of ascorbic acid or a derivative thereof means the amount in terms of ascorbic acid.

[0031] Composition a may contain other components besides cystine derivatives, hyaluronic acid or its derivatives, and ascorbic acid or its derivatives. Examples of other components include those commonly used in hair compositions. Examples of components commonly used in hair compositions include polyhydric alcohols (e.g., glycerin); lower alcohols (e.g., ethanol); higher alcohols (e.g., cetanol); anionic surfactants (e.g., sodium laureth sulfate, sodium olefin (C14-16) sulfonate, sodium laureth-4 carboxylate, sodium lauroyl methylalanine, sodium cocoyl methyl taurate, and sodium dilauroyl glutamate lysine); cationic surfactants (e.g., steartrimonium chloride and dimethylaminopropyl stearate); nonionic surfactants (e.g., polyoxyethylene hydrogenated castor oil such as PEG-60 hydrogenated castor oil, cocamide methyl monoethanolamide, and cocamide diethanolamide); amphoteric surfactants (e.g., cocamide Examples of these components include surfactants such as dopropyl betaine and lauramidopropylamine oxide; silicones (e.g., dimethicone, amodimethicone, and polysilicone-29); anionic polymers (e.g., carboxyvinyl polymer and xanthan gum); cationic polymers (e.g., O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride and xanthan hydroxypropyltrimonium chloride); nonionic polymers (e.g., polyvinylpyrrolidone, polyvinyl alcohol, and hydroxyethylcellulose); preservatives (e.g., phenoxyethanol, parabens, and benzoic acid); amino acids (e.g., arginine, glutamic acid, and glycine); and pH adjusters (e.g., citric acid, lactic acid, succinic acid, tartaric acid, and phosphoric acid). Composition a may contain one or more of these components.

[0032] Composition a further usually contains water. The water may be distilled water, deionized water, or purified water. The water content may be 40% by mass or more, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, or 85% by mass or more, or 100% by mass or less, 95% by mass or less, or 90% by mass or less, based on the total mass of composition a.

[0033] The pH of composition a may be 3 or higher, or 4 or higher, and may be 11 or lower, 10 or lower, 9 or lower, 8 or lower, or 7 or lower.

[0034] Composition a is used by applying it to hair (for example, by coating). Composition a may be, for example, a shampoo for controlling frizz, a treatment for controlling frizz, a hair mist for controlling frizz, etc. Alternatively, composition a may be a perming agent, a hair straightening agent, etc.

[0035] Hair frizz care may consist of at least one selected from the group comprising frizz removal, frizz addition, and frizz maintenance. Frizz removal includes hair straightening, frizz addition includes adding curls to the hair, and frizz maintenance includes retaining the curls added to the hair. Composition a may be a hair curl retention and / or hair straightening composition.

[0036] Furthermore, composition a may be used after being applied to hair and then heated. When composition a is used after being applied to hair and then heated, damage to the hair due to heating can be prevented. Also, by applying composition a to hair and then heating it, the effect of controlling frizz can be further enhanced, and elasticity can be imparted to the hair. When composition a is used after being applied to hair and then heated, composition a may be a composition for controlling frizz, as well as at least one of a composition for preventing damage to hair due to heating and a composition for imparting elasticity to hair.

[0037] Heating may be performed, for example, by using a hair iron or hair dryer. The heating temperature may be 60°C or higher, 90°C or higher, 100°C or higher, or 110°C or higher, and 250°C or lower, 180°C or lower, or 150°C or lower. Note that the heating temperature refers to the temperature of the hair iron or hair dryer at the time of heating (usually the set temperature).

[0038] The above composition a can be produced, for example, by mixing a cystine derivative with, optionally, hyaluronic acid or its derivative, ascorbic acid or its derivative, and other components with water.

[0039] According to composition a described above, it is possible to make it easier to care for frizz in hair. One aspect of this disclosure can also be considered as a method for caring for frizz in hair, which includes applying a composition containing a cystine derivative to hair. As for specific embodiments of the composition in this method, any of the embodiments described above can be adopted without particular limitation as embodiments of composition a. Furthermore, the composition in this method may be a composition for caring for frizz in hair.

[0040] The above-mentioned method for caring for frizzy hair may be a non-therapeutic method, for example, a cosmetic method. The above-mentioned method for caring for frizzy hair may be a method that performs at least one selected from the group consisting of removing, adding, and maintaining frizz in the hair, and may be a method for maintaining curls and / or straightening hair.

[0041] The above method for treating frizz in hair may include heating the hair to which the composition has been applied. In this case, the treatment of frizz in hair can be made even easier. Heating may be carried out, for example, by using a hair iron or a hair dryer. The heating temperature may be within the numerical range described above.

[0042] Furthermore, by applying composition a to the hair and then heating the hair, damage to the hair due to heat can be prevented, and elasticity can be imparted to the hair. One aspect of this disclosure can also be considered as a method for preventing damage to hair due to heat and a method for imparting elasticity to hair, which involves applying a composition containing a cystine derivative to the hair and then heating the hair. These methods may be non-therapeutic methods, for example, cosmetic methods. As for specific embodiments of the composition in these methods, each of the embodiments described above can be adopted without particular limitation as an embodiment of composition a. In addition, the composition in these methods may be a composition for treating frizz in hair. Heating may be carried out, for example, by using a hair iron or a hair dryer. The heating temperature may be within the numerical range described above.

[0043] Furthermore, one aspect of this disclosure can also be considered as the use of a composition containing a cystine derivative for the care of frizzy hair. Such use may include applying the composition containing the cystine derivative to the hair, and may further include heating the hair to which the composition has been applied. Specific embodiments of such use may be as described above in the method for caring for frizzy hair.

[0044] Furthermore, one aspect of this disclosure can also be considered as the use of a cystine derivative for manufacturing a composition for controlling hair frizz. In this use, the details of the cystine derivative and the composition for controlling hair frizz may be as described above.

[0045] Furthermore, one aspect of this disclosure can be understood as the use of a composition containing a cystine derivative to prevent damage to hair caused by heat, and also as the use of a composition containing a cystine derivative to impart elasticity to hair. These uses may include applying a composition containing a cystine derivative to hair and heating the hair to which the composition has been applied. Specific embodiments of these uses may be as described above for methods to prevent damage to hair caused by heat and for methods to impart elasticity to hair.

[0046] Furthermore, one aspect of this disclosure can be considered as the use of cystine derivatives for producing a composition for preventing hair damage caused by heat, or as the use of cystine derivatives for producing a composition for imparting elasticity to hair. In these uses, the details of the cystine derivative, the composition for preventing hair damage caused by heat, and the composition for imparting elasticity to hair may be as described above.

[0047] <Second Embodiment> Another embodiment of the present disclosure is a hair composition (hereinafter also referred to as "composition b") comprising a cystine derivative and at least one of hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof.

[0048] The details of the cystine derivative in composition b may be as described above for the cystine derivative in composition a. The content of the cystine derivative may be 0.001% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.08% by mass or more, 0.1% by mass or more, 0.3% by mass or more, or 0.5% by mass or more, based on the total mass of composition b, and may be 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, or 1% by mass or less.

[0049] Examples of hyaluronic acid derivatives include compounds obtained by introducing one or more groups selected from the group consisting of cationic functional groups, anionic functional groups, nonionic water-soluble functional groups, hydrophobic groups, and silanol groups into hyaluronic acid, salts of these compounds, and salts of hyaluronic acid. An example of a cationic functional group is the trimethylammonium group. An example of an anionic functional group is the carboxyl group. An example of a nonionic water-soluble functional group is the polyoxyalkylene group (e.g., the polyoxypropylene group). An example of a hydrophobic group is the acetyl group.

[0050] Examples of compounds in which a trimethylammonium group is introduced into hyaluronic acid include hydroxypropyltrimonium hyaluronate. Examples of compounds in which a carboxyl group is introduced into hyaluronic acid include carboxymethyl hyaluronic acid. Examples of compounds in which a polyoxyalkylene group is introduced into hyaluronic acid include propylene glycol hyaluronate. Examples of compounds in which an acetyl group is introduced into hyaluronic acid include acetylated hyaluronic acid. Examples of compounds in which a silanol group is introduced into hyaluronic acid include dimethylsilanol hyaluronate.

[0051] The salts of the compounds mentioned above and the salts of hyaluronic acid may be alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as magnesium salts; or zinc salts, respectively. Examples of hyaluronic acid salts include sodium hyaluronate, potassium hyaluronate, zinc hyaluronate, and magnesium hyaluronate.

[0052] Hyaluronic acid may be, for example, low molecular weight hyaluronic acid or very low molecular weight hyaluronic acid. Hyaluronic acid derivatives may be derivatives of low molecular weight hyaluronic acid or very low molecular weight hyaluronic acid. The weight-average molecular weight (M) of hyaluronic acid or its derivatives. ｗ ) may be less than 2 million. From the viewpoint of significantly achieving the effects of the present invention, the M of hyaluronic acid or its derivatives ｗ The M of hyaluronic acid or its derivative is more preferably 50,000 or less, particularly preferably 20,000 or less, and especially preferably 10,000 or less. ｗ The M of the salt of hyaluronic acid or its derivative may be 8000 or less, 5000 or less, or 3000 or less. ｗ Preferably, it is 100 or more, more preferably 200 or more, and even more preferably 500 or more.

[0053] In this specification, M of hyaluronic acid or its derivatives ｗ This refers to what is determined by gel filtration chromatography (GPC). M of hyaluronic acid or its derivatives ｗFor example, it can be measured by the following method. First, a calibration curve is created from the retention times of several (purified) hyaluronic acid (reference material) samples with known molecular weights, analyzed by liquid chromatography using a gel filtration column. Similarly, the hyaluronic acid or its derivative to be measured is analyzed by liquid chromatography, and the molecular weight of the hyaluronic acid or its derivative is determined using the created calibration curve.

[0054] M ｗ The measurement apparatus and conditions are as follows, for example: A Waters Japan 2690 separation module is used as the liquid chromatography analyzer. A Waters Japan 996 photodiode array is used as the photodiode array. One TSK Guard PWXL column (Tosoh Corporation) and two TSK Gel GMPW columns (Tosoh Corporation) are connected in series in the order listed. ｗ For the measurement, the following conditions are used: column temperature 40°C, measurement wavelength 210 nm, flow rate 0.8 mL / min, sample injection volume 20 μL, analysis time 40 minutes, and mobile phase 0.003 mol / L phosphate buffer - 0.15 mol / L NaCl (pH 7.0).

[0055] Hyaluronic acid or its derivatives may have a viscosity of 5,000 mPa·s or more, or 19,000 mPa·s or more, and may have a viscosity of 26,000 mPa·s or less, or 8,000 mPa·s or less, in a 1% by mass aqueous solution thereof. Hyaluronic acid or its derivatives may have a kinematic viscosity of, for example, 0.0 mm² in a 5% by mass aqueous solution thereof. ２ It may be greater than / s, and 10.0 mm ２ / s or less, 8.0mm ２ / s or less, 5.0mm ２ / s or less, 3.0mm ２ / s or less, or 2.0 mm ２ It is also acceptable if it is less than or equal to / s.

[0056] Commercially available products can also be used as hyaluronic acid or its derivatives. Examples of commercially available ultra-low molecular weight hyaluronic acid or derivatives of ultra-low molecular weight hyaluronic acid include HAbooster (trade name) (Kewpie Corporation; weight average molecular weight 2000). Examples of commercially available low molecular weight hyaluronic acid or derivatives of low molecular weight hyaluronic acid include Hyalo-Oligo (trade name) (Kewpie Corporation; weight average molecular weight 10,000 or less), Hyalozinc (trade name) (Kewpie Corporation; weight average molecular weight 10,000 or less), Hyaluronic Acid (SL) (trade name) (FAP Japan Co., Ltd.; weight average molecular weight 10,000 or less), Microhyaluronic Acid FCH (trade name) (Kikkoman Biochemifa Co., Ltd.; weight average molecular weight 5000 or less), HyalorePair (trade name) (Kewpie Corporation; weight average molecular weight 10,000 or less), and hyaluronic acid derivatives include Hyaloveil (trade name) (Kewpie Corporation: weight average molecular weight 500,000 to 800,000).

[0057] If composition b contains hyaluronic acid or a derivative thereof, the content of hyaluronic acid or a derivative thereof may be 0.0001% by mass or more, 0.001% by mass or more, 0.01% by mass or more, 0.05% by mass or more, or 0.08% by mass or more, based on the total mass of composition b, and may be 3% by mass or less, 1% by mass or less, or 0.5% by mass or less.

[0058] Examples of ascorbic acid derivatives include compounds obtained by introducing one or more groups selected from the group consisting of anionic functional groups, nonionic water-soluble functional groups, hydrophobic groups, and silanol groups into ascorbic acid, salts of these compounds, and salts of ascorbic acid. An example of anionic functional group is a phosphate group. An example of a nonionic water-soluble functional group is a glycoside group. An example of a hydrophobic group is an alkoxy group (e.g., an ethoxy group).

[0059] Examples of compounds in which a phosphate group is introduced into ascorbic acid include ascorbyl phosphate. Examples of compounds in which a glycoside group is introduced into ascorbic acid include ascorbyl glucoside. Examples of compounds in which an ethoxy group is introduced into ascorbic acid include 3-O-ethyl ascorbic acid. Examples of compounds in which a silanol group is introduced into ascorbic acid include methylsilanol ascorbate.

[0060] The salts of the compounds mentioned above and the salts of ascorbic acid may be alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as magnesium salts; or zinc salts, respectively. Examples of salts of ascorbic acid include sodium ascorbate, potassium ascorbate, zinc ascorbate, and magnesium ascorbate.

[0061] If composition b contains ascorbic acid or a derivative thereof, the content of ascorbic acid or a derivative thereof may be 0.0001% by mass or more, 0.001% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.08% by mass or more, or 0.1% by mass or more, based on the total mass of composition b, and may be 10% by mass or less, 5% by mass or less, 3% by mass or less, or 1% by mass or less. In this specification, the content of ascorbic acid or a derivative thereof means the amount in terms of ascorbic acid.

[0062] Composition b may contain other components besides cystine derivatives, hyaluronic acid or its derivatives, and ascorbic acid or its derivatives. Examples of other components include those listed above as components that can be used in composition a. Composition b may contain one or more of the above-mentioned components as examples of other components.

[0063] Composition b usually further contains water. The water may be distilled water, deionized water, or purified water. The water content may be 40% by mass or more, 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, or 85% by mass or more, or 100% by mass or less, 95% by mass or less, or 90% by mass or less, based on the total mass of composition b.

[0064] The pH of composition b may be 3 or higher, or 4 or higher, and may be 11 or lower, 10 or lower, 9 or lower, 8 or lower, or 7 or lower.

[0065] Composition b is used by applying it to hair (e.g., by coating). Composition b may be, for example, a shampoo, conditioner, or hair mist. Alternatively, composition b may be a perming agent or a hair straightening agent.

[0066] Composition b may be for hair frizz care. A hair composition for hair frizz care is also called a "hair frizz care composition." Hair frizz care may be at least one selected from the group consisting of frizz removal, frizz addition, and frizz maintenance. Frizz removal includes hair straightening, frizz addition includes adding curls to the hair, and frizz maintenance includes maintaining the curls added to the hair. A hair frizz care composition may also be a hair curl retention and / or hair straightening composition.

[0067] Furthermore, composition b may be used after being applied to hair and then heated. When composition b is used after being applied to hair and then heated, damage to the hair due to heating can be prevented. Also, by applying composition b to hair and then heating it, the effect of controlling frizz can be further enhanced, and smoothness can be imparted to the hair surface. When composition b is used after being applied to hair and then heated, composition b may be at least one of a composition for preventing damage to hair due to heating and a composition for imparting smoothness to the hair surface.

[0068] A hair composition containing a cystine derivative, hyaluronic acid or a derivative thereof, and ascorbic acid or a derivative thereof can be applied to hair and then heated to impart elasticity and suppleness to the hair. If composition b contains a cystine derivative, hyaluronic acid or a derivative thereof, and ascorbic acid or a derivative thereof, and is used after being applied to hair and then heated, then composition b may be at least one of a composition for imparting elasticity to hair and a composition for imparting suppleness to hair.

[0069] Heating may be performed, for example, by using a hair iron or hair dryer. The heating temperature may be 60°C or higher, 90°C or higher, 100°C or higher, or 110°C or higher, and 250°C or lower, 180°C or lower, or 150°C or lower. Note that the heating temperature refers to the temperature of the hair iron or hair dryer at the time of heating (usually the set temperature).

[0070] The above composition b can be produced, for example, by mixing a cystine derivative with at least one of hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof, other components as needed, and water.

[0071] According to composition b described above, it is possible to make it easier to care for frizz in the hair. One aspect of this disclosure can also be considered as a method for caring for frizz in the hair, which includes applying a composition comprising a cystine derivative and at least one of hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof to the hair. As for specific embodiments of the composition in this method, each of the embodiments described above can be adopted without particular limitation as an embodiment of composition b.

[0072] The above-mentioned method for caring for frizzy hair may be a non-therapeutic method, for example, a cosmetic method. The above-mentioned method for caring for frizzy hair may be a method that performs at least one selected from the group consisting of removing, adding, and maintaining frizz in the hair, and may be a method for maintaining curls and / or straightening hair.

[0073] The above method for treating frizz in hair may include heating the hair to which the composition has been applied. In this case, the treatment of frizz in hair can be made even easier. Heating may be carried out, for example, by using a hair iron or a hair dryer. The heating temperature may be within the numerical range described above.

[0074] Furthermore, by applying composition b to the hair and then heating the hair, damage to the hair due to heat can be prevented, and smoothness can be imparted to the hair surface. One aspect of this disclosure can also be considered as a method for preventing damage to hair due to heat and a method for imparting smoothness to the hair surface, which involves applying a composition comprising a cystine derivative and at least one of hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof to the hair, and then heating the hair. These methods may be non-therapeutic methods, for example, cosmetic methods. Specific embodiments of these methods can be adopted without particular limitation from among the embodiments described above as embodiments of the hair frizz care method.

[0075] If composition b contains a cystine derivative, hyaluronic acid or a derivative thereof, and ascorbic acid or a derivative thereof, applying composition b to the hair and then heating the hair can impart smoothness to the hair surface and elasticity to the hair, thereby imparting suppleness to the hair. One aspect of this disclosure can also be considered as a method for imparting elasticity to hair and a method for imparting suppleness to hair, which involves applying a composition containing a cystine derivative, hyaluronic acid or a derivative thereof, and ascorbic acid or a derivative thereof to the hair and then heating the hair. These methods may be non-therapeutic methods, for example, cosmetic methods. Specific embodiments of these methods can be adopted without particular limitation from among the embodiments described above as embodiments of the hair frizz care method.

[0076] Furthermore, one aspect of this disclosure can also be considered as the use of a composition comprising a cystine derivative and at least one of hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof for the care of frizz in hair. Such use may include applying the composition comprising a cystine derivative and at least one of hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof to the hair, and may further include heating the hair to which the composition has been applied. Details of the composition comprising a cystine derivative and at least one of hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof may be as described above for composition b.

[0077] Furthermore, one aspect of this disclosure can also be considered as the use of a cystine derivative and at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives for manufacturing a hair frizz care composition, or as the use of at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives in combination with a cystine derivative for manufacturing a hair frizz care composition, or as the use of a cystine derivative in combination with at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives for manufacturing a hair frizz care composition. In these cases, the details of the cystine derivative, hyaluronic acid or its derivatives, ascorbic acid or its derivatives, hair frizz care, and hair frizz care composition may be as described above.

[0078] Furthermore, one aspect of this disclosure can be understood as the use of a composition comprising a cystine derivative and at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives for preventing heat damage to hair, and can also be understood as the use of a composition comprising a cystine derivative and at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives for imparting smoothness to the hair surface. These uses may include applying a composition comprising a cystine derivative and at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives to hair, and heating the hair to which the composition has been applied. Specific embodiments of these uses may be as described above for methods of preventing heat damage to hair and methods for imparting smoothness to the hair surface.

[0079] Furthermore, one aspect of this disclosure can also be considered as the use of a cystine derivative, and at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives, for the production of a composition for preventing hair damage caused by heat; or as the use of at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives, in combination with a cystine derivative, for the production of a composition for preventing hair damage caused by heat; or as the use of a cystine derivative, in combination with at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives, for the production of a composition for preventing hair damage caused by heat. Furthermore, this can be interpreted as the use of a cystine derivative, and at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives, for the production of a composition for imparting smoothness to the hair surface; or as the use of at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives, used in combination with a cystine derivative, for the production of a composition for imparting smoothness to the hair surface; or as the use of a cystine derivative, used in combination with at least one of hyaluronic acid or its derivatives and ascorbic acid or its derivatives, for the production of a composition for imparting smoothness to the hair surface. In these uses, the details of the cystine derivative, hyaluronic acid or its derivatives, ascorbic acid or its derivatives, the composition for preventing hair damage due to heat, and the composition for imparting smoothness to the hair surface may be as described above.

[0080] Another aspect of this disclosure can be understood as the use of a composition comprising a cystine derivative, hyaluronic acid or a derivative thereof, and ascorbic acid or a derivative thereof for imparting elasticity to hair, and the use of a composition comprising a cystine derivative, hyaluronic acid or a derivative thereof, and ascorbic acid or a derivative thereof for imparting suppleness to hair. These uses may include applying a composition comprising a cystine derivative, hyaluronic acid or a derivative thereof, and ascorbic acid or a derivative thereof to hair, and heating the hair to which the composition has been applied. Details of the composition comprising a cystine derivative, hyaluronic acid or a derivative thereof, and ascorbic acid or a derivative thereof may be as described above for composition b. Specific embodiments of these uses may be as described above for the method of imparting elasticity to hair and the method of imparting suppleness to hair.

[0081] Furthermore, one aspect of this disclosure can also be considered as the use of cystine derivatives, hyaluronic acid or its derivatives, and ascorbic acid or its derivatives for manufacturing a composition for imparting elasticity to hair. Alternatively, it can be considered as the use of ascorbic acid or its derivatives in combination with cystine derivatives and hyaluronic acid or its derivatives for manufacturing a composition for imparting elasticity to hair, and also as the use of hyaluronic acid or its derivatives in combination with ascorbic acid or its derivatives and cystine derivatives for manufacturing a composition for imparting elasticity to hair, and also as the use of cystine derivatives in combination with ascorbic acid or its derivatives and hyaluronic acid or its derivatives for manufacturing a composition for imparting elasticity to hair. Furthermore, the use of hyaluronic acid or its derivatives and ascorbic acid or its derivatives can also be interpreted as the use of ascorbic acid or its derivatives and cystine derivatives for the production of a composition for imparting elasticity to hair, used in combination with cystine derivatives; and the use of cystine derivatives and hyaluronic acid or its derivatives for the production of a composition for imparting elasticity to hair, used in combination with hyaluronic acid or its derivatives. In these uses, the phrase "for the production of a composition for imparting elasticity to hair" can be read as "for the production of a composition for imparting suppleness to hair." In these uses, the details of the cystine derivative, hyaluronic acid or its derivatives, ascorbic acid or its derivatives, the composition for imparting elasticity to hair, and the composition for imparting suppleness to hair may be as described above.

[0082] The present disclosure will be described in more detail below based on examples. However, the present disclosure is not limited to the following examples.

[0083] <Test a> In the following tests a1 to a3, disaxinoylcystine tetrasodium (manufactured by Solabia Group, "KERASTIM® S") was used as the cystine derivative.

[0084] Test a1. Curl retention test Test a1-1. Test solution of Comparative Example a1 was prepared by adding citric acid to test water without a hair iron to adjust the pH to 4 at pH = 4 and a concentration of 0.1% by mass. A test solution of Example a1 was prepared by dissolving a cystine derivative in water so that the concentration of the cystine derivative in the test solution was 0.1% by mass and adjusting the pH to 4 with citric acid.

[0085] Using each of the prepared test solutions, the following curl retention test was conducted. A 3 g hair bundle (manufactured by Bureaulex Co., Ltd., "BS-B4-3") consisting of 100% black hair of Indian people was prepared, thinned to approximately 1 g, and a hair sample was produced. The length L of the produced hair sample (the vertical length from the starting point of the hair bundle to the tip of the hair bundle when the hair sample was suspended. The same applies hereinafter.) was measured. The hair sample was immersed in each test solution for 5 minutes at a bath ratio of 50 (hair: 1 g, liquid: 50 g), washed with running water for 5 seconds, and towel-dried. Subsequently, the hair sample was wound around a rod with a diameter of 20 mm, fixed with a weak rubber band across, left standing for 15 minutes, dried with a dryer at 120 °C for 5 minutes, and then the rod was removed and the length L of the hair sample ０ was measured. Further, the hair sample was hung in an environment of 40 °C and 80% RH, and the length L of the hair sample at the time when 60 minutes had elapsed ｔ（６０） was measured.

[0086] The measured L, L ０ , and L ｔ (L ｔ（６０） ) were used to calculate the SR (Set Retention) value by the following formula (i). SR value = (L - L ｔ ) / (L - L ０ ) × 100... (i) In the above formula (i), by using L ｔ as L ｔ（６０） , the SR value (60) is calculated. The larger the SR value, the higher the degree of curl retention imparted to the hair at the time when L ０ was measured. The above test was repeated 3 times for each of the test solutions of Comparative Example a1 and Example a1. L, L ０ , L ｔ（６０） [、and the average value of the SR value (60) was calculated respectively. The results are shown in Table 1.

[0087]

[0088] Test a1-2. Test at pH = 6, concentration 0.1% by mass, without a hair iron. The test solution of Comparative Example a2 was prepared in the same manner as Comparative Example a1 above, except that the pH was set to 6. The test solution of Example a2 was prepared in the same manner as Example a1 above, except that the pH was set to 6. Using each of the prepared test solutions, a curl retention test was conducted in the same manner as Test a1-1 above. The results are shown in Table 2.

[0089]

[0090] Test a1-3. Test at pH = 4, concentration 0.3% by mass, without a hair iron. The test solution of Comparative Example a1 was prepared as in Test a1-1 above. The test solution of Example a3 was prepared in the same manner as Example a1 above, except that the concentration of the cystine derivative was set to 0.3% by mass. Using each of the prepared test solutions, a curl retention test was conducted. For the curl retention test, as a hair sample, a 10 g hair bundle (manufactured by Bureau Lux Co., Ltd., "BS-B3A") consisting of 100% human black hair was prepared, thinned to about 1 g, and the prepared one was used. In addition to the length L of the hair sample at the time point when 60 minutes had elapsed, the length L of the hair sample at the time point when 30 minutes had elapsed was also measured. The SR value (30) was calculated using L, and the average value of the SR value (30) was also calculated in addition to L, L, L, and the SR value (60). The test was conducted in the same manner as Test a1-1 above. The results are shown in Table 3. ｔ（６０） In addition to the length L of the hair sample at the time point when 30 minutes had elapsed ｔ（３０） was also measured, and using L ｔ（３０） the SR value (30) was calculated, and in addition to L, L ０ and L ｔ（６０） the average value of the SR value (30) was also calculated in addition to the SR value (60). The test was conducted in the same manner as Test a1-1 above. The results are shown in Table 3.

[0091]

[0092] Test a1-4. Test with a hair iron at pH=4, concentration 0.3% by mass, and temperature 130°C. The test solution for Comparative Example a1 was prepared as in Test a1-1 above. The test solution for Example a3 was prepared as in Test a1-3 above. The following curl retention tests were performed using each of the prepared test solutions. A 10g hair bundle (Beaulux Co., Ltd., "BS-B3A") made of 100% human black hair was prepared, and thinned to approximately 1g to create hair samples. The length L of the prepared hair samples was measured. The hair samples were immersed in each test solution at a bath ratio of 50 (hair: 1g, solution: 50g) for 5 minutes, then rinsed with running water for 5 seconds, towel-dried, and dried with a hair dryer at 120°C for 5 minutes. After that, curls were formed in the hair samples using a hair iron at 130°C, and the length L of the hair samples was measured. ０ The following measurements were taken. Furthermore, the hair samples were suspended in an environment of 25°C and 50% RH, and the length L of the hair samples was measured after 3 hours. t（３ｈｒ） , and the length L of the hair sample after 24 hours. ｔ（２４ｈｒ） We measured it.

[0093] Measured L, L ０ , and L ｔ (L t（３ｈｒ） or L ｔ（２４ｈｒ） Using the above formula (i), the SR value (3hr) and SR value (24hr) were calculated. The above test was repeated three times for each test solution of Comparative Example a1 and Example a3. The L and L measured or calculated each time were... ０ , L t（３ｈｒ） , L ｔ（２４ｈｒ） The average values ​​of the SR (3-hour) and SR (24-hour) were calculated, respectively. The results are shown in Table 4.

[0094]

[0095] Test a1-5. Test using a hair iron with pH = 4, concentration 0.3% by mass, and temperature 230°C. The test solution for Comparative Example a1 was prepared as in Test a1-1 above. The test solution for Example a3 was prepared as in Test a1-3 above. A curl retention test was performed using each of the prepared test solutions. The curl retention test was performed in the same manner as in Test a1-4 above, except that the temperature of the hair iron was set to 230°C instead of 130°C. The results are shown in Table 5.

[0096]

[0097] Test a2. Hair straightening test Test a2-1. Test without a hair iron As in Test a1-1 above, the test solution for Comparative Example a1 was prepared. As in Test a1-3 above, the test solution for Example a3 was prepared. The following hair straightening tests were performed using each of the prepared test solutions. A 0.5 g hair bundle consisting of 100% Brazilian black hair with natural curls was prepared, washed with an aqueous solution of SLES (sodium laureth sulfate) (SLES concentration: 10% by mass), and dried with a hair dryer at 80°C for 1 minute. Five pumps (approximately 1 g) of the test solution from a mist container were applied to the dried hair bundle, and then the hair bundle was dried with a hair dryer for 30 seconds.

[0098] From the hair bundles that underwent the above treatment, 10 random hairs were cut 10 cm from the root of the bundle and collected. The maximum width of the curl was measured for each collected hair. The average of the maximum values ​​of the curl width measured for the 10 hairs was calculated. The results are shown in Table 6. Note that the curl width refers to the length of lines drawn perpendicular to the reference line, when the collected hair is placed on a horizontal surface and a straight line connecting the two ends of the collected hair is used as the reference line. The smaller the maximum value of the curl width, the more strongly the natural curl (kinkiness) has been corrected.

[0099]

[0100] Test a2-2. Test using a 130°C hair iron The test solution for Comparative Example a1 was prepared as in Test a1-1 above. The test solution for Example a3 was prepared as in Test a1-3 above. The following hair straightening tests were performed using each of the prepared test solutions. A 0.5 g hair bundle consisting of 100% Brazilian black hair with natural curls was prepared, washed with an aqueous solution of SLES (SLES concentration: 10% by mass), and dried with an 80°C hair dryer for 1 minute. Five pumps (approximately 1 g) of the test solution from a mist container were applied to the dried hair bundle, and then the hair bundle was dried with a hair dryer for 30 seconds. After that, the hair bundle was straightened with a 130°C hair iron. Specifically, the roots of the hair bundle were clamped with a 130°C hair iron, and the hair iron was slid down to the ends of the hair five times while the sample was clamped.

[0101] From the hair bundles that underwent the above treatment, 10 random hairs were cut 10 cm from the root of the bundle and collected. The maximum width of the curl was measured for each collected hair. The average of the maximum curl widths measured for the 10 hairs was calculated. The results are shown in Table 7.

[0102]

[0103] Test a2-3. Test using a hair iron at 230°C The test solution for Comparative Example a1 was prepared as in Test a1-1 above. The test solution for Example a3 was prepared as in Test a1-3 above. The hair straightening test was performed in the same manner as in Test a2-2 above, except that the temperature of the hair iron was 230°C instead of 130°C. The results are shown in Table 8.

[0104]

[0105] Test a2-4. Visual evaluation. Hair mists for Comparative Examples a3 and a4 and Example a4 were prepared by mixing the types and amounts of each component shown in Table 9. The amount of citric acid was adjusted so that the pH of the hair mist was 4.5.

[0106]

[0107] The following hair straightening tests were conducted using each of the prepared hair mists. Hair strands from a Brazilian person (purchased from Amazon) were washed with an aqueous solution of SLES (SLES concentration: approximately 13% by mass) and then dried with a hairdryer. After drying, 1 g of hair mist was applied to the hair strands and allowed to penetrate, and then a 130°C hair iron was used five times. The appearance of each hair strand was then visually inspected. Figure 1 shows photographs of the hair strands after being ironed five times.

[0108] In hair bundles treated with the test solutions of Comparative Examples a3 and a4, the hair remained strongly wavy, whereas in hair bundles treated with the test solution of Example a4, the hair was less wavy compared to Comparative Examples a3 and a4. From this, it was visually confirmed that the hair mist of Example a4 has the effect of making hair straightening easier.

[0109] Test a3. Effects of application and heating of the test solution As described in Test a1-1 above, the test solution for Comparative Example a1 was prepared. As described in Test a1-3 above, the test solution for Example a3 was prepared. A 3g hair bundle (Beaulux Co., Ltd., "BS-B4-3") made of 100% black Indian hair was prepared. The hair bundle was washed with an aqueous solution of SLES (SLES concentration: 10% by mass) and dried with an 80°C dryer for 1 minute to prepare the sample for Test Example a1. Samples for Test Examples a2 to a5 were prepared by performing only Treatment 1 or both Treatment 1 and Treatment 2 on the sample for Test Example a1, as shown in Table 10. Treatment 1: Ten pumps (approximately 2g) of the test solution (test solution for Comparative Example a1 or Example a3) in a mist container were applied to the sample for Test Example a1, and then the sample was dried with an 80°C dryer for 30 seconds. Process 2: The roots of the sample after Process 1 were clamped with a 230°C hair iron, and the hair iron was slid down to the ends of the hair 40 times while the sample was still clamped.

[0110] Ten strands of hair were randomly selected from the hair samples in each test example to form a bundle. 0.1g weights were attached to both ends of the bundle so that the distance between the weights was 10cm, and the bundle was then cut. Using the midpoint between the two ends of the bundle as a fulcrum, the bundle was suspended from a rod with a diameter of 0.5cm, and the maximum distance between the hanging strands was measured. Three bundles were prepared from the same sample, and the above measurement was performed. The average of the three measurements was calculated. The results are shown in Table 10. A larger maximum distance between the hanging strands indicates better hair elasticity.

[0111]

[0112] In the sample of Test Example a3, the maximum distance between hanging hair strands was shorter compared to the samples of Test Examples a1 and a2. This is thought to be due to damage caused by heating. However, in the sample of Test Example a5, the maximum distance between hanging hair strands was longer compared to the sample of Test Example a3. This indicates that when a composition containing a cystine derivative is applied to hair and then heated, damage to the hair due to heating is prevented. Furthermore, in the sample of Test Example a5, the maximum distance between hanging hair strands was longer compared to the sample of Test Example a1, which received no treatment. This indicates that applying the test solution used in Test Example a5 (the test solution of Example a3) to hair and then heating the hair can impart elasticity to the hair. In fact, when the sample of Test Example a5 was touched by hand, it felt more elastic than the sample of Test Example a1. On the other hand, in the sample of test example a4, where heating with a hair iron was not performed after application of the test solution, the maximum distance between hanging hair strands was not longer compared to the sample of test example a1. From this, it was confirmed that the effect of imparting elasticity to the hair is brought about by heating the hair after applying the composition.

[0113] <Test b> The types and amounts of each component shown in Table 11 were mixed to prepare the test solutions for Comparative Example b1 and Examples b1 to b3. The amount of citric acid was adjusted so that the pH of the test solution was 4.

[0114]

[0115] The details of the components used to prepare each test solution are as follows: Cystine derivative: Disuccinoylcystine 4Na (manufactured by Solabia Group, "KERASTIM® S") Hydrolyzed hyaluronic acid: Sodium salt of ultra-low molecular weight hyaluronic acid, manufactured by Kewpie Corporation, "HAbooster", M ｗ Kinematic viscosity of 2000, 5% by mass aqueous solution at 30°C: 2.0 mm ２ / s or less Ascorbic acid (Vitamin C): Manufactured by DSM Co., Ltd., "Ascorbic Acid"

[0116] Test b1. Curl Retention Test Test b1-1. Test without a hair iron The following curl retention tests were performed using each test solution. A 10g hair bundle (Beaulux Co., Ltd., "BS-B3A") made of 100% human black hair was prepared, and thinned to approximately 1g to create hair samples. The length L of the prepared hair sample (the vertical length from the starting point of the hair bundle to the tip of the hair bundle when the hair sample is suspended; the same applies below) was measured. The hair sample was immersed in each test solution with a bath ratio of 50 (hair: 1g, solution: 50g) for 5 minutes, then rinsed with running water for 5 seconds and towel-dried. Next, the hair sample was wrapped around a 20mm diameter rod, secured with a weak rubber band in a cross pattern, left to stand for 15 minutes, then dried with a 120°C hairdryer for 5 minutes, and then the rod was removed and the length L of the hair sample was measured. ０ The following measurements were taken: Furthermore, the hair samples were suspended in an environment of 40°C and 80% RH, and the length L of the hair samples was measured after 30 minutes. ｔ（３０） , and the length L of the hair sample after 60 minutes. ｔ（６０） We measured it.

[0117] Measured L, L ０ , and L ｔ (L ｔ（３０） or L ｔ（６０） Using the following formula (i), the SR (Set Retention) value was calculated: SR value = (L - L ｔ ) / (L-L ０ ) × 100 ... (i) Note that in the above formula (i), L ｔ As L ｔ（３０）By using this, the SR value (30) is calculated, L ｔ（６０） By using this, the SR value (60) is calculated. The larger the SR value, the higher the L ０ At the time of measurement, the degree of curl retention in the hair was considered high. The above test was repeated three times for each test solution of Comparative Example b1 and Examples b1 to b3. The L and L values ​​measured or calculated each time were ０ , L ｔ（３０） , L ｔ（６０） The average values ​​of the SR (30) and SR (60) were calculated, respectively. The results are shown in Table 12.

[0118]

[0119] Test b1-2. Test with a 130°C hair iron The following curl retention tests were performed using each test solution. A 10g hair bundle (Beaulux Co., Ltd., "BS-B3A") made of 100% human black hair was prepared, and thinned to approximately 1g to create hair samples. The length L of the prepared hair samples was measured. The hair samples were immersed in each test solution for 5 minutes in a bath ratio of 50 (hair: 1g, solution: 50g), then rinsed with running water for 5 seconds, towel-dried, and dried with a 120°C hairdryer for 5 minutes. After that, curls were formed in the hair samples using a 130°C hair iron, and the length L of the hair samples was measured. ０ The following measurements were taken. Furthermore, the hair samples were suspended in an environment of 25°C and 50% RH, and the length L of the hair samples was measured after 3 hours. t（３ｈｒ） , and the length L of the hair sample after 24 hours. ｔ（２４ｈｒ） We measured it.

[0120] Measured L, L ０ , and L ｔ (L t（３ｈｒ） or L ｔ（２４ｈｒ） Using the above formula (i), the SR value (3hr) and SR value (24hr) were calculated. The above test was repeated three times for each test solution of Comparative Example b1 and Examples b1 to b3. The L and L measured or calculated each time were... ０ , L t（３ｈｒ） , L ｔ（２４ｈｒ） The average values ​​of the SR (3hr) and SR (24hr) were calculated, respectively. The results are shown in Table 13.

[0121]

[0122] Test b1-3. Test with a hair iron at 230°C. A curl retention test was performed using each test solution, in the same manner as in Test b1-2 above, except that the hair iron temperature was set to 230°C instead of 130°C. The results are shown in Table 14.

[0123]

[0124] Test b2. Hair straightening test Test b2-1. Test without a hair iron

[0125] The following hair straightening tests were performed using each of the prepared test solutions. A 0.5 g hair bundle consisting of 100% Brazilian black hair with natural curls was prepared, washed with an aqueous solution of SLES (sodium laureth sulfate) (SLES concentration: 10% by mass), and dried with an 80°C hair dryer for 1 minute. Five pumps (approximately 1 g) of the test solution from a mist container were applied to the dried hair bundle, and the bundle was then dried with a hair dryer for 30 seconds. From the hair bundles that had undergone the above treatment, 10 strands of hair were randomly selected and cut 10 cm from the roots of the bundle. The maximum width of the curl was measured for each strand of hair. The average of the maximum values ​​of the curl width measured for the 10 strands of hair was calculated. The results are shown in Table 15. Note that the curl width refers to the length of the lines drawn perpendicular to the reference line, when the collected hair is placed on a horizontal surface and the straight line connecting the two ends of the collected hair is used as the reference line. The smaller the maximum width of the wave, the more strongly the natural curl (curly hair) has been straightened.

[0126]

[0127] Test b2-2. Test using a 130°C hair iron The following hair straightening tests were performed using each of the prepared test solutions. A 0.5 g hair bundle consisting of 100% Brazilian black hair with natural curls was prepared, washed with an aqueous solution of SLES (SLES concentration: 10% by mass), and dried with an 80°C hair dryer for 1 minute. Five pumps (approximately 1 g) of the test solution from a mist container were applied to the dried hair bundle, and the hair bundle was then dried with a hair dryer for 30 seconds. After that, the hair bundle was straightened with a 130°C hair iron. Specifically, the roots of the hair bundle were clamped with a 130°C hair iron, and the hair iron was slid down to the ends of the hair five times while the sample was clamped. From the hair making up the hair bundle after the above treatment, 10 random hairs were cut and collected 10 cm from the roots of the hair bundle. The maximum width of the curl in each collected hair was measured. The average of the maximum width of the curl measured for 10 strands of hair was calculated. The results are shown in Table 16.

[0128]

[0129] Test b2-3. Test using a 230°C hair iron. A hair straightening test was conducted using the same method as in Test b2-2 above, except that the temperature of the hair iron was set to 230°C instead of 130°C. The results are shown in Table 17.

[0130]

[0131] Test b2-4. Sensory Test The following tests were conducted using each of the prepared test solutions. A 0.5 g hair bundle consisting of 100% Brazilian black hair with natural curls was prepared, washed with an aqueous solution of SLES (SLES concentration: 10% by mass), and dried with an 80°C hair dryer for 1 minute. Five pumps (approximately 1 g) of the test solution from a mist container were applied to the dried hair bundle, and the hair bundle was then dried with a hair dryer for 30 seconds. After that, the hair bundle was straightened with a 230°C hair iron. Specifically, the roots of the hair bundle were clamped with a 230°C hair iron, and the hair iron was slid down to the ends of the hair five times while the sample was clamped. The condition (feel) of the hair bundle after the above treatment was checked. Specifically, the hair bundle was touched by hand to check the smoothness of the hair surface and the presence or absence of elasticity. For hair smoothness, "A" was rated if the hair felt smooth, and "B" was rated if the hair did not feel smooth. Hair elasticity was evaluated as "A" if the hair felt elastic, and "B" if the hair did not feel elastic. The results are shown in Table 18.

[0132]

[0133] In hair bundles treated with the test solutions of Examples b1 to b3, a smoothness of the hair surface was felt. In addition, in hair bundles treated with the test solution of Example b3, both the smoothness of the hair surface and the elasticity of the hair were felt, resulting in a feeling of suppleness. Furthermore, the hair bundles treated with the test solutions of Examples b1 to b3 showed a visually desirable finish. In addition, the hair bundles treated with the test solutions of Examples b1 to b3 were more manageable, and a feeling of shine and youthfulness was perceived.

[0134] Test b3. Effects of application and heating of the test solution A 3g hair bundle (Beaulux Co., Ltd., "BS-B4-3") made of 100% black Indian human hair was prepared. The hair bundle was washed with an aqueous solution of SLES (SLES concentration: 10% by mass) and dried with an 80°C hair dryer for 1 minute to prepare the sample for Test Example b1. Samples for Test Examples b2 to b6 were prepared by performing either only Treatment 1 or both Treatment 1 and Treatment 2 on the sample for Test Example b1, as shown in Table 19. Treatment 1: Ten pumps (approximately 2g) of the test solution shown in Table 19, placed in a mist container, were applied to the sample for Test Example b1, and the sample was then dried with a hair dryer for 30 seconds. Treatment 2: The roots of the sample after Treatment 1 were clamped with a 230°C hair iron, and the hair iron was slid down to the ends of the hair 40 times while the sample was clamped.

[0135] Ten strands of hair were randomly selected from the hair samples in each test example to form a bundle. 0.1g weights were attached to both ends of the bundle so that the distance between the weights was 10cm, and the bundle was then cut. Using the midpoint between the two ends of the bundle as a fulcrum, the bundle was suspended from a rod with a diameter of 0.5cm, and the maximum distance between the hanging strands was measured. Three bundles were prepared from the same sample, and the above measurement was performed. The average of the three measurements was calculated. The results are shown in Table 19. A larger maximum distance between the hanging strands indicates better hair elasticity.

[0136]

[0137] In the sample of test example b3, the maximum distance between hanging hair strands was shorter compared to the samples of test examples b1 and b2. This is thought to be due to damage caused by heating. However, in the samples of test examples b4 to b6, the maximum distance between hanging hair strands was longer compared to the sample of test example b3. This indicates that when a composition containing a cystine derivative and at least one of hyaluronic acid or its derivative and ascorbic acid or its derivative is applied to hair and then heated, damage to the hair due to heating is prevented. Furthermore, in the sample of test example b6, the maximum distance between hanging hair strands was significantly longer compared to the sample of test example b1, which received no treatment. This also indicates that elasticity can be imparted to hair by applying a composition containing a cystine derivative, hyaluronic acid or its derivative, and ascorbic acid or its derivative to hair and then heating the hair.

[0138] <Examples of Formulations> Examples of formulations are shown in Table 20 below.

[0139]

Claims

1. A hair composition containing a cystine derivative for treating frizz.

2. The hair frizz control composition according to claim 1, which is used after being applied to hair and then heated.

3. A hair composition comprising a cystine derivative and at least one of hyaluronic acid or a derivative thereof and ascorbic acid or a derivative thereof.

4. A hair composition comprising a cystine derivative, hyaluronic acid or a derivative thereof, and ascorbic acid or a derivative thereof.

5. A hair composition according to claim 3 or 4, for the purpose of treating frizz in hair.

6. The hair composition according to claim 3 or 4, which is used after being applied to hair and then heated.

7. A method for preventing damage to hair caused by heat, comprising applying the hair composition for hair frizz care described in claim 1 or 2, or the hair composition described in claim 3 or 4, to the hair, and then heating the hair.

8. A method for imparting elasticity to hair, comprising applying the hair composition for hair frizz care described in claim 1 or 2, or the hair composition described in claim 4, to the hair, and then heating the hair.

9. A method for imparting smoothness to the surface of hair, comprising applying the hair composition according to claim 3 or 4 to the hair and then heating the hair.

10. A method for imparting suppleness to hair, comprising applying the hair composition described in claim 4 to the hair and then heating the hair.

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