Hair treatment method

Abstract

To provide a hair treatment method for hair with wave curls involving forming a non-reversible spiral shape to achieve a three-dimensional wave with a consistent curl direction with high reproducibility when hairstyling by scrunching.SOLUTION: A hair treatment method comprises the following steps (i) and (ii). Step (i): a step of applying a hair treatment composition, comprising one or more compounds selected from polyalkylene glycol ether and alkylene glycol, to hair having wave curls. Step (ii): a step of performing scrunching manipulation on wet hair with a water to hair mass ratio (water / hair) of 0.05 to 1 inclusive.SELECTED DRAWING: None

Description

Technical Field

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

Background Art

[0002] In conventional hair styling methods for hair with wave curls, the direction of the curls is partially reversed and becomes a messy shape, not only losing beauty but also the curls coming loose from the reversed part, resulting in a problem of reduced curl persistence.

[0003] Also, conventionally, when setting hair with wave curls, a so-called "scrunch" hand technique of grasping, kneading, or twisting the hair bundle is used (for example, Patent Documents 1 to 3). However, during this scrunching, there are problems such as the curls not aligning, not being able to obtain a three-dimensional wave feeling, and flyaways being prominent.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0068] ,

[0070] )

Patent Document 2

[0148] )

Patent Document 3

[0058] )

Summary of the Invention

Problems to be Solved by the Invention

[0005] In conventional techniques including Patent Documents 1 to 3, due to the above problems, even when using the same shampoo, conditioner, and styling agent and styling hair in the same way, there is a problem of low reproducibility of wave curls, where sometimes the styling is successful and sometimes it is not.

[0006] Therefore, the present invention relates to a hair treatment method that can form a non-reversing spiral shape in hair having wavy curls, and can create three-dimensional waves with aligned curl directions with high reproducibility when styling hair by scrunching. [Means for solving the problem]

[0007] The inventors of the present invention have discovered that by treating hair having wavy curls with a specific compound, it is possible to achieve the aforementioned hair styling requirements, and have completed the present invention.

[0008] The present invention provides a hair treatment method comprising the following steps (i) and (ii). Step (i): Applying a hair treatment composition containing one or more compounds selected from polyalkylene glycol ethers and alkylene glycols to hair having waves and curls. Step (ii): A step in which, after step (i), a scrubbing operation is performed on wet hair in which the mass ratio of water to hair (water / hair) is 0.05 or more and 1 or less.

[0009] The present invention also provides a composition for improving the reshaping properties of wave curls, which contains one or more compounds selected from polyalkylene glycol ethers and alkylene glycols. [Effects of the Invention]

[0010] According to the present invention, a non-reversing spiral shape can be formed in hair with wavy curls, and when styling hair by scrunching, it is possible to create three-dimensional waves with aligned curl directions with high reproducibility. [Brief explanation of the drawing]

[0011] [Figure 1] This figure shows the method for calculating the helix ratio. [Modes for carrying out the invention]

[0012] The hair treatment method of the present invention includes the following steps (i) and (ii). 〔Step (i): Application step〕 Step (i) is a step of applying a hair treatment agent composition containing one or more compounds selected from polyalkylene glycol ethers and alkylene glycols to hair having a wave curl. The hair treatment agent composition may be a leave-off preparation such as shampoo or conditioner, or a leave-on preparation such as a conditioner that is not rinsed off or a hair styling agent.

[0013] The treatment target in the hair treatment method of the present invention is hair having a wave curl. This hair having a wave curl is hair having several curls from near the root to the tip, and includes both natural curly hair and hair by perm or other hair deformation treatments.

[0014] The hair for performing step (i) may be either dry hair or wet hair, but from the viewpoint of improving the application property of the hair treatment agent composition, wet hair is more preferable. Note that this wet hair includes not only hair wet with water but also hair towel-dried after being wet with water. In addition, when the hair treatment agent composition is a leave-on dosage form with a high moisture content such as a hair mist, it can be preferably applied to either dry hair or wet hair.

[0015] Examples of the polyalkylene glycol ether contained in the hair treatment agent composition used in step (i) include compounds represented by the following general formula (1).

[0016]

Chemical formula

[0017] 〔In the formula, R 1 represents a hydrogen atom or a methyl group, R 2 represents an alkyl group having 1 to 5 carbon atoms, and n represents a number from 2 to 6.〕

[0018] In general formula (1), R 1 is preferably a hydrogen atom, R 2 is preferably an alkyl group having 2 to 4 carbon atoms, and n is preferably a number of 2 to 3.

[0019] Examples of the compound represented by the general formula (1) include diethylene glycol monomethyl ether (methyl carbitol), diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monopropyl ether (propyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, etc. Among them, diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), and triethylene glycol monomethyl ether are preferable.

[0020] Examples of the alkylene glycol used in step (i) include ethylene glycol, 1,3 - propanediol, 1,3 - butanediol, 3 - methyl - 1,3 - butanediol (isoprene glycol), etc. Among them, 1,3 - propanediol and 3 - methyl - 1,3 - butanediol (isoprene glycol) are preferable.

[0021] Of these, from the viewpoint of forming a spiral shape without inversion, suppressing flyaways and unruly hairs, and improving curl reproducibility, one or more selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), triethylene glycol monomethyl ether, 1,3-propanediol, and 3-methyl-1,3-butanediol (isoprene glycol) is preferred, one or more selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), triethylene glycol monomethyl ether, and 1,3-propanediol is more preferred, one or more selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), and triethylene glycol monomethyl ether is even more preferred, one or more selected from diethylene glycol monoethyl ether (ethyl carbitol) and diethylene glycol monobutyl ether (butyl carbitol) is even more preferred, and it is even more preferable to include diethylene glycol monoethyl ether (ethyl carbitol).

[0022] The total content of compounds selected from polyalkylene glycol ethers and alkylene glycols in the hair treatment composition used in step (i) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, even more preferably 2% by mass or more, even more preferably 3% by mass or more, even more preferably 4% by mass or more, and even more preferably 5% by mass or more, from the viewpoint of forming a helical shape without inversion and improving the reproducibility of curls, and also preferably 20% by mass or less, more preferably 18% by mass or less, even more preferably 15% by mass or less, and even more preferably 12% by mass or less, from the viewpoint of improving the stability of the formulation (preventing significant viscosity reduction during formulation and making viscosity control difficult).

[0023] In particular, when alkylene glycol is used alone, the alkylene glycol content in the hair treatment composition used in step (i) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, from the viewpoint of forming a helical shape without inversion and improving the reproducibility of curls, and from the viewpoint of improving the stability of the formulation (preventing significant viscosity reduction during formulation and making viscosity control difficult), it is preferably 10% by mass or less, more preferably 8% by mass or less, and even more preferably 5% by mass or less.

[0024] The hair treatment composition preferably uses water as a medium, and may also contain, depending on the desired dosage form, ingredients commonly found in hair cosmetics. Examples include anti-dandruff agents, vitamins, disinfectants, anti-inflammatory agents, preservatives, chelating agents, moisturizers, colorants (dyes, pigments, etc.), pearlescent agents, pH adjusters, fragrances, UV absorbers, antioxidants, photocatalysts, rose water, surfactants, organic solvents, hydrocarbons, higher alcohols, thickeners, oils, silicones, and various film-forming polymers.

[0025] The hair treatment composition used in step (i) may further contain a film-forming polymer from the viewpoint of providing a smooth feel to the hair or improving the hair's hold. However, since the film-forming polymer may reduce the formation of a non-reversing spiral shape or reduce the reproducibility of curls, its content is preferably 5% by mass or less, more preferably 1% by mass or less, even more preferably 0.5% by mass or less, and even more preferably 0.1% by mass or less in the hair treatment composition, and even more preferably substantially free of film-forming polymers. In this invention, "substantially absent" means that the content in the composition is less than 0.01% by mass, preferably 0% by mass. Furthermore, in this invention, the term "film-forming polymer" refers to a polymer that can form a film on a keratinous substance when dried.

[0026] Examples of film-forming polymers are given below. <Anionic film-forming polymer> Anionic film-forming polymers containing one of the following as a constituent unit: crotonic acid, maleic acid, maleic acid monoester, or itaconic acid: While not particularly limited as long as it contains crotonic acid, maleic acid, maleic acid monoester, or itaconic acid as a constituent unit, examples include those copolymerized with one or more vinyl ethers, vinyl esters, or vinyl alcohols. Specifically, examples include methyl vinyl ether / alkyl maleate copolymer (e.g., Gantlets ES-225, ES-425, SP-215 from ISP), vinyl acetate / crotonic acid copolymer (e.g., Resin 28-1310 from National Starch), vinyl acetate / crotonic acid / vinyl neodecanoate copolymer (e.g., Resin 28-2930 from National Starch), vinyl acetate / crotonic acid / vinyl propionate copolymer (e.g., Rubiset CAP from BASF), vinyl alcohol / itaconic acid copolymer (e.g., KM-118 from Kuraray), etc.

[0027] • Anionic film-forming polymer containing (meth)acrylic acid as a constituent unit: Examples include vinyl polymers containing (meth)acrylic acid as a constituent unit. Specifically, these include acrylic acid / ethyl acrylate / Nt-butylacrylamide copolymer (such as BASF's Ultrahold 8 and Ultrahold Strong), octylacrylamide / acrylic acid copolymer (such as National Starch's Unformer V-42), acrylate / methacrylate / acrylic acid / methacrylic acid copolymer (such as Union Carbide's Amahold DR25), acrylates / diacetone acrylamide copolymer (such as Go-O Chemical Industry's Plussize L9540B (the 2-amino-2-methyl-1-propyl alcohol neutralized product of the polymer)), and acrylates / C1-18 alkylacrylates / C1-8 alkylacrylamide copolymer (such as Go-O Chemical Industry's Plussize L9909B (the 2-amino-2-methyl-1-propyl alcohol neutralized product of the polymer)).

[0028] • Natural anionic film-forming polymers having either a carboxyl group or a sulfate group: The natural polysaccharides having either a carboxyl group or a sulfate group are not particularly limited, but examples include carrageenan (e.g., Soagina LX22 and ML210 from Mitsubishi Rayon Co., Ltd.) and xanthan gum (e.g., Echogum T from Dainippon Pharmaceutical Co., Ltd.).

[0029] • Polyesters having either a carboxyl group or a sulfonic acid group: Examples include, but are not limited to, water-dispersible polyesters (such as Eastman Kodak's AQ38S and AQ55S).

[0030] <Amphoteric film-forming polymer> Examples include vinyl polymers, although they are not particularly limited. Here, amphoteric polymers include both copolymers containing one or more anionic monomers and one or more cationic monomers as constituent units, and copolymers containing one or more so-called betaine monomers having both an anionic and a cationic part in their monomer structure as constituent units. Specifically, examples include dimethyldiallylammonium / acrylamide / acrylic acid copolymer (such as Merquardt 3331 from Calgon), N-methacryloyloxyethyl-N,N-dimethylammonium-α-N-methylcarboxybetaine / alkyl methacrylate copolymer (such as Yukaformer M-75 and SM from Mitsubishi Chemical Corporation), and octylacrylamide / acrylate / butylaminoethyl methacrylate copolymer (such as Amformer 28-4910 from National Starch).

[0031] <Cationic film-forming polymer> Examples include vinyl polymers having one or more structures selected from quaternary ammonium structures, tertiary amine structures, secondary amine structures, and primary amine structures, and natural polysaccharides or modified natural polysaccharides having one or more structures selected from quaternary ammonium structures, tertiary amine structures, secondary amine structures, and primary amine structures.

[0032] • Vinyl polymer: As vinyl polymers having one or more selected from quaternary ammonium structures, tertiary amine structures, secondary amine structures, and primary amine structures, preferred examples include vinyl polymers having one or more selected from (meth)acrylic acid esters having secondary amino groups, tertiary amino groups, or quaternary ammonium groups, (meth)acrylamides having secondary amino groups, tertiary amino groups, or quaternary ammonium groups, N-substituted allylamines, and N-substituted allylammoniums as constituent units. Specifically, alkylacrylamide / acrylate / alkylaminoalkylacrylamide / polyethylene glycol methacrylate copolymer (polymer described in the examples of Japanese Patent Publication No. 2-180911), alkylacrylamide / alkylaminoalkylacrylamide / polyethylene glycol methacrylate copolymer (polymer described in the examples of Japanese Patent Publication No. 8-291206), polydimethyldiallylammonium chloride (e.g., Merquart 100 from Calgon), acrylamidopropyltrimethylammonium chloride / acrylate copolymer (e.g., Merquart from Calgon), acrylamide / dimethyldiallylammonium chloride copolymer (e.g., Merquart 550, 2200 from Calgon), methylvinylimidazolium chloride / vinylpyrrolidone copolymer (e.g., Rubicor from BASF) Examples include FC370, FC550, FC905, HM552, etc., vinylpyrrolidone / dimethylaminopropyl methacrylamide copolymer (such as Gaffcut HS-100 from ISP), diethyl sulfate of vinylpyrrolidone / dimethylaminoethyl methacrylate copolymer (such as Gaffcut 734, 755N, 755 from ISP), vinyl alcohol / dimethylaminopropyl methacrylamide copolymer (such as C-318 from Kuraray), vinylpyrrolidone / dimethylaminoethyl methacrylate copolymer (such as Copolymer 845, 937, 958 from ISP), vinylpyrrolidone / alkylaminoacrylate / vinylcaprolactam copolymer (such as Copolymer VC-713 from ISP), and vinyl alcohol / vinylamine copolymer (such as VA-120-HCl from Air Product).

[0033] • Natural polysaccharides or modified natural polysaccharides: Preferred natural polysaccharides or modified natural polysaccharides having one or more selected from quaternary ammonium structures, tertiary amine structures, secondary amine structures, and primary amine structures include hydroxyethylcellulose / dimethyldiallylammonium chloride copolymer (National Starch: Cellcoat H-100, L-200, etc.), hydroxyethylcellulose / 2-hydroxypropyltrimethylammonium chloride (Union Carbide Polymer JR-400, etc.), guahydroxypropyltrimonium chloride (Henkel Cosmedia Gua C-261N, Lorne-Poulenk: Jaguar C-17, etc.), hydroxypropyl chitosan (Ichimaru Falcos Chitofilmer HV-10, etc.), and chitosan-dl-pyrrolidone carboxylate (Union Carbide Kitemer PC, etc.).

[0034] The hair treatment composition may further contain reducing compounds. However, among reducing compounds, compounds having a thiol group or aldehyde group, sulfites, and sulfinic acids are preferably substantially omitted because they may accelerate hair damage, reduce the formation of a non-reversing spiral shape, and decrease the reproducibility of curls. Furthermore, reducing compounds having an ascorbyl group may also pose the above risks depending on the content, so their content in the hair treatment composition is preferably less than 1% by mass, more preferably less than 0.5% by mass, even more preferably less than 0.1% by mass, and even more preferably less than 0.05% by mass.

[0035] Examples of reducing compounds containing a thiol group include thioglycolic acid, thiolactic acid, cysteine, cysteamine, homocysteine, glutathione, thioglycerol, thiomalic acid, 2-mercaptopropionic acid, 3-mercaptopropionic acid, thiodiglycol, 2-mercaptoethanol, dithiothreitol, N-acetylcysteine, esters and amides of thioglycolic acid or thiolactic acid.

[0036] Examples of reducing compounds containing an aldehyde group include formaldehyde, 1,3,5-trioxane, paraformaldehyde, and formalin. Similarly, methylene glycol is a compound that exists in equilibrium in an aqueous formaldehyde solution and is essentially synonymous with formalin; therefore, it is included in this definition.

[0037] Examples of sulfites include ammonium sulfite, ammonium bisulfite, sodium sulfite, sodium bisulfite, potassium sulfite, and potassium bisulfite.

[0038] Examples of sulfinic acids include sulfinates and benzenesulfinates.

[0039] Examples of reducing compounds containing an ascorbyl group include ascorbic acid, erythorbic acid, and their salts or esters. Specific examples include ascorbic acid, sodium ascorbate, potassium ascorbate, calcium ascorbate, ammonium ascorbate, monoethanolamine ascorbate, diethanolamine ascorbate, erythorbic acid, sodium erythorbate, disodium ascorbate sulfate, magnesium ascorbate phosphate, ascorbyl palmitate, ascorbyl stearate, ascorbyl dipalmitate, ascorbyl tetra-2-hexyldecanoate, ascorbyl myristate, and lauric acid. Examples include ascorbyl phosphate, ascorbyl acetate, ascorbyl propionate, ascorbyl tartrate, ascorbyl citrate, ascorbyl succinate, ascorbyl benzoate, potassium (ascorbyl / tocopheryl) phosphate, ascorbyl ethyl, allantoin ascorbate, chitosan ascorbate, methylsilanol ascorbate, tetradecylhexyl ascorbyl, aminopropyl ascorbyl phosphate, ascorbyl peptide, ascorbyl glucoside, and ascorbyl methylsilanol pectinate.

[0040] After step (i), a hair treatment agent containing a compound selected from polyalkylene glycol ether and alkylene glycol is applied to the hair having waves and curls, and then optionally one or more of the following steps (i-1), (i-2), and (i-3) may be performed. Step (i-1): A step of rinsing the hair treatment composition off the hair. Step (i-2): A step to achieve a wet state where the mass ratio of water to hair (water / hair) is between 0.05 and 1. Step (i-3): Step of performing a combing operation on the hair.

[0041] If the hair treatment composition is a leave-off formulation, after step (i), a step (i-1) is performed to rinse the hair treatment composition off the hair. After step (i-1), a step (i-2) may be included to bring the hair to a wet state where the mass ratio of water to hair (water / hair) is 0.05 or more and 1 or less, from the viewpoint of making the effect of the scrunching operation in step (ii) more pronounced. The above mass ratio is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, even more preferably 0.5 or more, and also preferably 0.9 or less, more preferably 0.8 or less. Methods for adjusting the degree of wetness in step (i-2) include, for example, water absorption by towel drying or water addition by spraying with water. If the hair is in the above wet state after step (i-1), it is not necessary to perform step (i-2), but step (i-2) can be performed as appropriate to adjust to a more suitable degree of wetness.

[0042] The following is a rough guideline for the aforementioned wet state. • Mass ratio (water / hair) 1: Whether water drips from wet hair after washing when it drains naturally. • Mass ratio (water / hair) of 0.9: Similar to the amount of water in wet hair after washing, lightly squeezed by hand. • Mass ratio (water / hair) of 0.7: Approximately the amount of water removed by pressing a towel against wet hair after washing. • Mass ratio (water / hair) of 0.5: This is equivalent to the amount of hair that has been wet after washing and then rubbed with a dry towel. • A mass ratio (water / hair) of 0.3: This is the state when wet hair has been thoroughly dried with a towel after washing, just before the hair strands begin to separate. Alternatively, it can be achieved by spraying water on dry hair or applying styling products until it feels slightly wet. • Mass ratio (water / hair) of 0.05: Equivalent to applying a light leave-in conditioner to dry hair.

[0043] If the hair treatment composition is a leave-on formulation, it is preferable that the hair after step (i) is in a moist state within the above range, from the viewpoint of making the effect of the scrunching operation more pronounced.

[0044] If the curls are heavily tangled after step (i), it is preferable to include step (i-3) of combing the hair before performing step (ii) in order to align the hair flow and make it easier to perform the scrunching operation. The combing operation may be performed using tools such as a comb or brush, or by running fingers through the hair.

[0045] [Process (ii): Scrunching Process] Step (ii) is a step in which a scrunching operation is performed on hair that is in a wet state after step (i), where the mass ratio of water to hair (water / hair) is 0.05 or more and 1 or less. Here, in the present invention, the scrunching operation is preferably one or more operations selected from 1) to 3) below from the viewpoint of forming a spiral shape without inversion, and it is more preferable to repeat any of operations 1) to 3). From the viewpoint of suppressing flyaways and loosening, it is preferable to perform one or more operations selected from 2) and 3), and it is more preferable to perform operation 3). From the viewpoint of forming a three-dimensional wavy curl and improving the reproducibility of the curl, it is preferable to perform one or more operations selected from 1) and 3), and it is more preferable to perform operation 3). When performing the scrunching operation, the hair bundle may be placed on a towel spread out in the palm of the hand. 1) Grasp or rub the hair 2) Twist the hair 3) Place the hair in your palm, lift it up as if you're gripping it, and then release it.

[0046] The scrunching operation is preferably performed on wet hair, which is in a moist state where the mass ratio of water to hair (water / hair) is 0.05 or more and 1 or less, from the viewpoint of making the effects of the scrunching operation more pronounced. The preferred range for this mass ratio is the same as the range described in step (i-2) above.

[0047] The number of repetitions of the scrunching operation is preferably 1 or more, more preferably 3 or more, and even more preferably 5 or more, per handful of hair strands, from the viewpoint of forming a three-dimensional wave curl without any loose hairs, and from the viewpoint of reducing labor, it is preferably 50 or less, more preferably 30 or less, and even more preferably 20 or less.

[0048] Through repeated scrunching, the individual waves gradually shift out of alignment with each other, creating a three-dimensional, voluminous wave curl as a hair bundle.

[0049] In the present invention, the reason why the above-described wave curl can be formed by the scrunching operation is that, by performing a scrunching operation on wet hair treated with polyalkylene glycol ether and / or alkylene glycol in step (i), the shape of the hair bundle tends to become helical. In the present invention, the helical structure formed by the scrunching operation can be evaluated by the helicity ratio expressed by the following formula.

[0050] Helix ratio (%) = (Number of forward curls / Total number of curls) × 100 ("Number of forward curls" is the number of points where a curl curls in the same direction as it did half a turn ago, when a strand of hair is placed from the ends as if folded and the direction of the curl is observed from the root side of the trace.)

[0051] The helicity ratio in this invention represents the degree of uniformity of the helical shape of the hair bundle as a whole, and does not represent the degree of uniformity of the shape of each individual hair.

[0052] In the present invention, the helicity ratio is preferably 40% to 100%, more preferably 45% to 100%, and even more preferably 50% to 100%, from the viewpoint of forming a three-dimensional wave curl without any loose hairs.

[0053] The hair treatment composition used in step (i) can improve the effect of the scrunching operation in step (ii), improve the helicity ratio, and improve the reformability of wave curls. Here, "reformability" means that for wave curls where the uniformity of the helical shape of the wave curls has decreased over time due to external factors such as wind, vibration, and contact, resulting in flyaways, looseness, or a decrease in the three-dimensional appearance, the uniformity of the helical shape of the wave curls can be improved by combing with the fingers, reducing flyaways and looseness, or improving the three-dimensional appearance. In other words, the above hair treatment composition is suitable as an agent for improving the effect of the scrunching operation on hair with wave curls, a composition for improving the helicity ratio, a composition for controlling the helical structure, and a composition for improving the reformability of wave curls.

[0054] With respect to the embodiments described above, preferred embodiments of the present invention are further disclosed below.

[0055] <1> A hair treatment method comprising the following steps (i) and (ii). Step (i): Applying a hair treatment composition containing one or more compounds selected from polyalkylene glycol ethers and alkylene glycols to hair having waves and curls. Step (ii): A step in which, after step (i), a scrubbing operation is performed on wet hair in which the mass ratio of water to hair (water / hair) is 0.05 or more and 1 or less.

[0056] <2> The polyalkylene glycol ether is preferably a compound represented by the following general formula (1): <1> The hair treatment method described below.

[0057] [ka]

[0058] [In the formula, R 1 R represents a hydrogen atom or a methyl group, preferably a hydrogen atom. 2 [where n represents an alkyl group having 1 to 5 carbon atoms, preferably 2 to 4, and n represents a number of 2 to 6, preferably 2 to 3.]

[0059] <3> The polyalkylene glycol ether is preferably one or more selected from diethylene glycol monomethyl ether (methyl carbitol), diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monopropyl ether (propyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), triethylene glycol monomethyl ether, and triethylene glycol monoethyl ether, more preferably one or more selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), and triethylene glycol monomethyl ether. <1> or <2> The hair treatment method described below.

[0060] <4> The alkylene glycol is preferably one or more selected from ethylene glycol, 1,3-propanediol, 1,3-butanediol, and 3-methyl-1,3-butanediol (isoprene glycol), more preferably one or more selected from 1,3-propanediol and 3-methyl-1,3-butanediol (isoprene glycol). <1> ~ <3> A hair treatment method described in any one of the following items.

[0061] <5> One or more compounds selected from polyalkylene glycol ethers and alkylene glycols are preferably one or more selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), triethylene glycol monomethyl ether, 1,3-propanediol, and 3-methyl-1,3-butanediol (isoprene glycol), more preferably one or more selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), triethylene glycol monomethyl ether, and 1,3-propanediol, even more preferably one or more selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), and triethylene glycol monomethyl ether, even more preferably one or more selected from diethylene glycol monoethyl ether (ethyl carbitol) and diethylene glycol monobutyl ether (butyl carbitol), and even more preferably diethylene glycol monoethyl ether (ethyl carbitol). <1> ~ <4> A hair treatment method described in any one of the following items.

[0062] <6> The total content of compounds selected from polyalkylene glycol ethers and alkylene glycols in the hair treatment composition is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, even more preferably 2% by mass or more, even more preferably 3% by mass or more, even more preferably 4% by mass or more, and even more preferably 5% by mass or more, and also preferably 20% by mass or less, more preferably 18% by mass or less, even more preferably 15% by mass or less, and even more preferably 12% by mass or less. <1> ~ <5> A hair treatment method described in any one of the following items.

[0063] <7> The hair treatment composition contains only alkylene glycol as a compound selected from polyalkylene glycol ether and alkylene glycol, and the alkylene glycol content in the hair treatment composition is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, and also preferably 10% by mass or less, more preferably 8% by mass or less, and even more preferably 5% by mass or less. <1> ~ <6> A hair treatment method described in any one of the following items.

[0064] <8> The content of the film-forming polymer in the hair treatment composition is preferably 5% by mass or less, more preferably 1% by mass or less, even more preferably 0.5% by mass or less, and even more preferably 0.1% by mass or less, and even more preferably the hair treatment composition is substantially free of film-forming polymers. <1> ~ <7> A hair treatment method described in any one of the following items.

[0065] <9> The hair treatment composition substantially does not contain reducing compounds selected from compounds having a thiol group or aldehyde group, sulfites, and sulfinic acids. <1> ~ <8> A hair treatment method described in any one of the following items.

[0066] <10> The content of a reducing compound having an ascorbyl group in the hair treatment composition is preferably less than 1% by mass, more preferably less than 0.5% by mass, even more preferably less than 0.1% by mass, and even more preferably less than 0.05% by mass. <1> ~ <9> A hair treatment method described in any one of the following items.

[0067] <11> The hair treatment composition is a leave-off formulation. <1> ~ <10> A hair treatment method described in any one of the following items.

[0068] <12> After step (i), step (i-1) is performed to rinse the hair treatment composition off the hair. <11> The hair treatment method described below.

[0069] <13> The process includes step (i-2) after step (i-1), wherein the mass ratio of water to hair (water / hair) is preferably 0.05 or more, more preferably 0.1 or more, even more preferably 0.2 or more, even more preferably 0.3 or more, even more preferably 0.5 or more, and also preferably 1 or less, more preferably 0.9 or less, and even more preferably 0.8 or less, resulting in a wet state. <12> The hair treatment method described below.

[0070] <14> The hair treatment composition is a leave-on formulation. <1> ~ <10> A hair treatment method described in any one of the following items.

[0071] <15> Preferably, perform step (i) on hair that has been pre-moistened. <1> ~ <14> A hair treatment method described in any one of the following items.

[0072] <16> When performing step (ii), the hair is in a wet state in which the mass ratio of water to hair (water / hair) is preferably 0.05 or more, more preferably 0.1 or more, even more preferably 0.2 or more, even more preferably 0.3 or more, even more preferably 0.5 or more, and also preferably 1 or less, more preferably 0.9 or less, and even more preferably 0.8 or less. <1> ~ <15> A hair treatment method described in any one of the following items.

[0073] <17> The scrunching operation in step (ii) is preferably one or more operations selected from the following 1) to 3): <1> ~ <16> A hair treatment method described in any one of the following items. 1) Grasp or rub the hair 2) Twist the hair 3) Place the hair in your palm, lift it up as if you're gripping it, and then release it.

[0074] <18> The scrunching operation is preferably one or more operations selected from 2) and 3) above, more preferably operation 3). <17> The hair treatment method described below.

[0075] <19> The scrunching operation is preferably one or more operations selected from 1) and 3) above, more preferably operation 3). <17> The hair treatment method described below.

[0076] <20> The process includes, preferably, step (i-3) of performing a combing operation on the hair after step (i) and before performing step (ii), <1> ~ <19> A hair treatment method described in any one of the following items.

[0077] <21> The helicity ratio in the treated hair, expressed by the following formula, is preferably 40% to 100%, more preferably 45% to 100%, and even more preferably 50% to 100%. <1> ~ <20> A hair treatment method described in any one of the following items. Helix ratio (%) = (Number of forward curls / Total number of curls) × 100 ("Number of forward curls" is the number of points where a curl curls in the same direction as it did half a turn ago, when a strand of hair is placed from the ends as if folded and the direction of the curl is observed from the root side of the trace.)

[0078] <22> A composition for improving the reshaping properties of wave curls, containing one or more compounds selected from polyalkylene glycol ethers and alkylene glycols.

[0079] <23> An agent for improving the effectiveness of scrunching operations on hair with waves and curls, containing one or more compounds selected from polyalkylene glycol ethers and alkylene glycols.

[0080] <24> A composition for controlling the helical structure of hair having waves and curls, comprising one or more compounds selected from polyalkylene glycol ethers and alkylene glycols.

[0081] <25> A composition for improving the helical ratio of hair having waves and curls, comprising one or more compounds selected from polyalkylene glycol ethers and alkylene glycols.

[0082] <26> An agent for improving the effectiveness of scrunching operations on hair with waves and curls, comprising one or more compounds selected from polyalkylene glycol ethers and alkylene glycols.

[0083] <27> A composition for controlling the helical structure of hair having waves and curls, comprising one or more compounds selected from polyalkylene glycol ethers and alkylene glycols.

[0084] <28> A composition for improving the helical ratio of hair having a wave curl, comprising one or more compounds selected from polyalkylene glycol ethers and alkylene glycols.

[0085] <29> A hair treatment method comprising the following steps (i) and (ii). Step (i): Applying a hair treatment composition containing one or more compounds selected from polyalkylene glycol ethers and alkylene glycols to hair having waves and curls. Step (ii): After step (i), a scrunching operation is performed on the hair to set the hair's spiral ratio, expressed by the following formula, to be between 40 and 100. Helix ratio (%) = (Number of forward curls / Total number of curls) × 100 ("Number of forward curls" is the number of points where a curl curls in the same direction as it did half a turn ago, when a strand of hair is placed from the ends as if folded and the direction of the curl is observed from the root side of the trace.)

[0086] <30> The following steps (i) and (ii); Step (i): Applying a hair treatment composition containing 3% to 18% by mass of one or more compounds selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), and triethylene glycol monomethyl ether to hair having a wavy curl. Step (ii): After step (i), a step in which one or more scrubbing operations selected from 1) to 3) below are performed on moist hair in which the mass ratio of water to hair (water / hair) is 0.3 or more and 1 or less. 1) Grasp or rub the hair 2) Twist the hair 3) Place the hair in your palm, lift it up as if you're gripping it, and then release it. A hair treatment method that includes, and optionally, after step (i) and before step (ii), one or more of steps (i-1), (i-2), and (i-3) may be performed. Step (i-1): A step of rinsing the hair treatment composition off the hair. Step (i-2): A step to achieve a wet state where the mass ratio of water to hair (water / hair) is between 0.05 and 1. Step (i-3): Step of performing a combing operation on the hair.

[0087] <31> The following steps (i), (i-1) and (ii); Step (i): Applying a hair treatment composition containing 5% to 15% by mass of one or more compounds selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), and triethylene glycol monomethyl ether to hair having a wavy curl. Step (i-1): A step of rinsing the hair treatment composition off the hair. Step (ii): After step (i-1), a step in which one or more scrubbing operations selected from 1) and 3) below are performed on wet hair in which the mass ratio of water to hair (water / hair) is 0.3 or more and 1 or less. 1) Grasp or rub the hair 3) Place the hair in your palm, lift it up as if you're gripping it, and then release it. A hair treatment method that includes step (i-1) and optionally allows one or more of steps (i-2) and (i-3) to be performed after step (i-1). Step (i-2): A step to create a wet state in which the mass ratio of water to hair (water / hair) is 0.05 or more and 1 or less. Step (i-3): Step of performing a combing operation on the hair.

[0088] <32> A composition for improving the reshaping properties of wave curls, containing 3% to 18% by mass of one or more compounds selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), and triethylene glycol monomethyl ether.

[0089] <33> A composition for improving the reshaping properties of wave curls, containing 5% to 15% by mass of one or more compounds selected from diethylene glycol monoethyl ether (ethyl carbitol), diethylene glycol monobutyl ether (butyl carbitol), and triethylene glycol monomethyl ether. [Examples]

[0090] Examples 1-10, Comparative Examples 1-2 The components listed in Table 1 were uniformly mixed to prepare the sample and the comparison sample. The values ​​in the table represent the active amount.

[0091] [Table 1]

[0092] Additionally, the following plain shampoos were used for hair treatment.

[0093] [Table 2]

[0094] The following evaluations were performed using the aforementioned samples and comparative samples. The results are shown in Table 3. (Trace for evaluation) Trace A: One strand of Caucasian curly hair (purchased from Kerling International Haarrfabrik, curly hair, 30cm long, with 4-5 curls from root to tip) weighed 0.25g and used as one trace. Trace B: The same 2.0g of hair as in Trace A was used as one strand for the trace.

[0095] (Hair treatment procedure) Step 1: Apply the plain shampoo to a strand of hair from Tres A or Tres B, lather and wash for 1 minute, then rinse with running water for 30 seconds. After rinsing and removing excess water from the hair, apply the sample shown in the example to the hair in a bath ratio of 1:1 and let it sit for 1 minute. Subsequently, in Example 1, the plant was suspended by its base without rinsing and allowed to drain naturally for 10 seconds. In Examples 2-9 and Comparative Examples 1-2, the plant was rinsed in running water for 30 seconds, and then suspended by its base and allowed to drain naturally for 10 seconds. Subsequently, in Example 7, combing (passing the comb through the hair from the roots to the ends three times) is performed.

[0096] Step 2: Scrunch (*) the hair treated in Step 1 10 times. Comparative Example 2 does not involve scrubbing. *Scrunch: (a) Simulate the motion of placing a strand of hair in the palm of your hand, lifting it up as if grasping it, and then releasing it. Repeat this motion 10 times at a rate of once per second, pressing the ends of the hair onto a towel placed on a table and then lifting it up. (b) Mimicking the motion of gripping and kneading hair, lift the trace from the ends of the hair and repeat the action of spreading your hand and gripping it as if kneading it 10 times at a rate of once per second. (c) To mimic the action of twisting hair, wrap the trace around your finger and pull your finger out towards the ends of the hair, repeating this motion 10 times.

[0097] Step 3: Allow to air dry (Drying conditions: Hang and leave overnight in a laboratory atmosphere (approximately 25°C, 45RH))

[0098] (Performance evaluation) ·Spiral rate: The hair treatment described above is applied to five strands of Tres A. After treatment, as shown in Figure 1 as an example, the hair bundles are placed from the ends in a folded manner, and the curl count is taken every half turn of the curl. When observing the direction of the curl from the root side of the Tres, a section where a curl is curling in the same direction as half a turn earlier (forward rotation section) is considered to have created a beautiful curl. The more forward rotation sections there are, the more uniform the curls are. The ratio of the total number of forward rotation sections to the total number of curl sections in the Tres is defined as the spiral ratio according to the following formula. In the evaluation, the average spiral ratio of the five strands of Tres was used. Helix ratio (%) = (Number of forward curls / Total number of curls) × 100 ("Number of forward curls" is the number of points where a curl curls in the same direction as it did half a turn ago, when a strand of hair is placed from the ends as if folded and the direction of the curl is observed from the root side of the trace.) For example, in the example on the left of Figure 1, counting every half turn of the curl, all four curls are forward rotations, so the helix ratio is (4 / 4) × 100 = 100%. In the example on the right of Figure 1, of the four curls, three are forward rotations and one is a reverse rotation, so the helix ratio is (3 / 4) × 100 = 75%. A higher helix ratio indicates greater uniformity.

[0099] • Loose hair / loosening score: Trace B, after the aforementioned hair treatment, was photographed, and the number of hairs clearly separated from the hair bundle was counted in the area 3-8 cm from the root. A higher number indicates more loose, scattered hairs.

[0100] ·Three-dimensionality: Place the hair treatment sample B on a table, and place a piece of cardboard measuring 8.5cm x 21cm and weighing 3.5g on top of it. Measure the height (cm) from the top surface of the table to the cardboard. A higher height from the top surface of the table to the cardboard indicates that a firmer curl has been formed.

[0101] • Reproducibility 1 (You can style your hair to the same finish every time): Perform the aforementioned hair treatment on one strand of hair A and observe the direction of the curl. Repeat this 10 times on the same strand. For each curl formed from the root to the tip, count the number of times it rotated forward out of the 10 repetitions. The more forward rotations there are, the more beautiful curls are reproduced. The evaluation is based on the ratio of the total number of forward rotations to the total number of curls that appear in 10 trials, according to the following formula. Number of forward rotation points appearing in 10 turns / Total number of curl points appearing in 10 turns × 100 (%)

[0102] • Reproducibility 2 (Even if disrupted, it returns to its original state): After performing the aforementioned hair treatment and drying, the hair B is combed 10 times to break the wave curl, and then a scrunching treatment is performed to evaluate the reproducibility to the original wave curl. Specifically, the state of the hair bundle after performing the aforementioned hair treatment and drying on TRES B is compared with the state of the hair bundle after combing it 10 times and then repeating the motion of gripping the hair bundle and sliding the hand from the root to the tip 10 times. The bundle width is measured at 5cm, 10cm, and 15cm from the root, and the reproducibility of the shape is compared using the value of [bundle width after repeating the motion of sliding the hand after combing 10 times / bundle width before combing]. The closer this value is to 1, the higher the reproducibility. The table shows the average values ​​of the above at 5cm, 10cm, and 15cm from the root.

[0103] [Table 3]

Claims

1. A hair treatment method comprising the following steps (i) and (ii): Step (i): applying a hair treatment composition containing one or more compounds selected from polyalkylene glycol ethers and alkylene glycols to wavy curled hair. Step (ii): After step (i), a step of performing a scrunching operation on wet hair having a mass ratio of water to hair (water / hair) of 0.05 or more and 1 or less.

2. The hair treatment method according to claim 1, wherein the scrunching operation in step (ii) is one or more operations selected from the following 1) to 3): 1) Grasping or kneading hair 2) Twist your hair 3) Place the hair in the palm of your hand and lift it up as if you are squeezing it, then release it.

3. 3. The hair treatment method according to claim 1, further comprising a step (i-3) of combing the hair after the step (i) and before the step (ii).

4. 3. The hair treatment method according to claim 1, wherein the hair treatment composition is a leave-off formulation.

5. 3. The hair treatment method according to claim 1, wherein the hair treatment composition is a leave-on preparation.

6. 5. The hair treatment method according to claim 4, wherein step (i) is followed by step (i-1) of rinsing the hair treatment composition from the hair.

7. 3. The method for treating hair according to claim 1, wherein step (i) is carried out on hair that has been previously wetted.

8. 3. The hair treatment method according to claim 1, wherein the hair is in a wet state when step (ii) is carried out, with a mass ratio of water to hair (water / hair) of 0.3 or more and 1 or less.

9. A composition for improving the reshapeability of wave curls, comprising one or more compounds selected from polyalkylene glycol ethers and alkylene glycols.