JP2018035093A - Hair treatment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hair treatment method which does not generate unpleasant odor from the hair after hair straightening treatment using glyoxylic acids not only immediately after treatment but also a long period of time.SOLUTION: There is provided a hair treatment method which comprises steps 1 to 5 carried out in the following order: 1. a step of applying a first composition which is acidic and comprises one or two or more selected from glyoxylic acid, a glyoxylic acid hydrate, a glyoxylate salt and a glyoxylamide to the hair; 2. a step of leaving the hair to which the first composition is applied; 3. a step of heating the hair with a high-temperature heating device; 4. a step of applying a second composition comprising a water-soluble zinc salt to the hair; and 5. a step of leaving the hair to which the second composition is applied.SELECTED DRAWING: None

Description

  The present invention relates to a method for performing semi-permanent straightening without generating a characteristic odor.

  As a method for temporarily curling curled hair and curly hair, use of a high-temperature heating device such as a straight iron is known. The hydrogen bond of hair keratin is cut and reformed by the high temperature of the high-temperature heating device, and temporary straightening is achieved. Since this hydrogen bond is cut by the action of moisture, it returns to the original hair shape over time due to moisture in the air, or the effect of straightening is lost by washing the hair.

  As a method for permanently or semi-permanently deforming hair, a reducing agent containing sulfide groups, thiol groups, etc. is allowed to act to cleave disulfide bonds to deform hair into a desired shape, and then hydrogen peroxide, etc. There is a method of fixing the hair shape by re-forming disulfide bonds by applying an oxidizing agent. Alternatively, an alkali agent such as sodium hydroxide or guanidine hydroxide is allowed to act at a pH of about 12 or more to cleave the disulfide bond into an α, β-unsaturated dehydroalanine moiety and a cysteine moiety, thereby forming a thioether bond. There is a method of forming lanthionine by forming it. In these methods, permanent or semi-permanent straightening can be achieved, and the effect of straightening disappears only by hair growth. However, these treatments are known to damage hair.

  Recently, when a carboxylic acid having a carbonyl group adjacent to a carboxy group (glyoxylic acid, etc.) is used in combination with a mechanical straightening means involving heating such as a hair iron, a semi-permanent straightening effect can be obtained. Has been found (for example, Patent Document 1). The treatment method using glyoxylic acid or the like together with mechanical straightening means with heating such as a hair iron can also be performed by combining hair dyeing treatment or decoloring treatment after the treatment (Patent Documents 2 and 3). In the hair treatment using these specific carboxylic acids, straight hair can be obtained while suppressing damage to the hair, and the straightened appearance can be maintained even after repeating multiple times of hair washing.

Special Table 2013-520468 Special Table 2015-535268 Publication Special Table 2015-535269

  It has been found that a characteristic odor may be generated from the hair after the hair treatment method described in Patent Document 1 is actually applied. This odor is not felt when the hair is dry, but only when the hair is wet, and this odor is not only immediately after treatment, but also for a long period of several weeks when the hair is wet. Occurred over the years. For this reason, every time the hair is wet after treatment, such as sweating or sweating, this unique odor may be felt. Moreover, even when hair is dyed or decolored after straightening treatment using glyoxylic acid, as in the hair treatment methods described in Patent Documents 2 and 3, there may be cases where the generation of this unique odor is felt. there were.

  Therefore, the present invention relates to a hair treatment method in which a specific odor does not occur over a long period of time, not only immediately after treatment, from hair after straightening treatment using glyoxylic acids and a high-temperature heating device.

  As a result of intensive studies, the inventor applied a composition containing a water-soluble zinc salt to the hair after straightening treatment using a high-temperature heating device such as glyoxylic acid and a hair iron, so that the hair became wet after the treatment. The invention has been completed by finding that the characteristic odor produced during the process is drastically reduced.

The present invention provides a hair treatment method including steps 1 to 5 performed in the following order.
1. 1. Applying a first composition that is acidic and contains one or more selected from glyoxylic acid, glyoxylic acid hydrate, glyoxylate and glyoxylamide to hair. 2. leave the hair to which the first composition is applied; 3. heating the hair with a high-temperature heating device 4. Applying to the hair a second composition comprising a zinc salt having a solubility in water of at least 5 mg / 100 mL-H ₂ O at 25 ° C. Leaving the hair to which the second composition is applied

The present invention also includes a first composition that is one or more selected from glyoxylic acid, glyoxylic acid hydrate, glyoxylate and glyoxylamide, and is acidic, and has a solubility in water of 25 ° C. And a second composition containing a zinc salt that is 5 mg / 100 mL-H ₂ O or more.

  Furthermore, this invention provides use of the said hair treatment kit for straightening hair.

  According to the hair treatment method of the present invention, unpleasant odors are not generated not only immediately after treatment but also for a long time from hair after straightening treatment using glyoxylic acids.

<First composition (straightening composition)>
The first composition is used for straightening treatment, and is one kind of a compound selected from glyoxylic acid, glyoxylic acid hydrate, glyoxylic acid salt and glyoxylamide as an active ingredient (hereinafter sometimes referred to as glyoxylic acid). Or it contains 2 or more types. Examples of the hydrate of glyoxylic acid include glyoxylic acid monohydrate. Examples of glyoxylic acid salts include glyoxylic acid alkali metal salts and glyoxylic acid alkaline earth metal salts. Examples of alkali metal salts include lithium salts, sodium salts, and potassium salts. Examples thereof include magnesium salt and calcium salt. Examples of glyoxylamide include N-glyoxyloylcarbocysteine and N-glyoxyloylkeratin amino acid. Of these, glyoxylic acid is preferred.

  The content of glyoxylic acids in the first composition is preferably 0.1% by mass or more, more preferably 0.5% by mass, based on the total amount of the first composition, from the viewpoint of sufficiently exerting the straightening effect. From the viewpoint of operability during the treatment, it is preferably 40% by mass or less, more preferably 30% by mass or less, and further preferably 25% by mass or more. It is at most 20% by mass, more preferably at most 20% by mass. When the glyoxylic acid is glyoxylic acid hydrate, glyoxylic acid salt or glyoxylamide, the glyoxylic acid equivalent amount may be within the above range.

  The first composition is an acidic composition, and the pH thereof is preferably 4.0 or less, more preferably 3.0 or less, still more preferably 2.5 or less, from the viewpoint of sufficiently exerting the straightening effect. From the viewpoint of safety, it is preferably 0.5 or more, more preferably 1.0 or more. The pH of the first composition can be adjusted using a known alkaline agent, preferably sodium hydroxide, or a known acid other than glyoxylic acids. The pH is a value obtained by directly measuring the composition at 25 ° C.

  As mentioned above, the conventional permanent hair shape deformation / straightening method is based on disulfide bridge breakage and reconfiguration, followed by cleavage of disulfide bonds with sulfur-based reducing agents, alkali agents, etc. , Including deforming the hair and forming new bonds. This new bond is a disulfide bond or thioether bond formed by the action of an oxidizing agent after cleavage of the disulfide bond. Unlike such permanent straightening methods, the present invention does not utilize disulfide bond cleavage or bond fixation in new shapes. Therefore, it is not necessary for the first composition used in the present invention to contain a sulfur-based reducing agent. However, if the total amount of the composition is up to 2% by mass, the sulfur-based reducing agent does not hinder the straightening performance of the composition. Therefore, the content of the sulfur-based reducing agent in the first composition is preferably less than 2% by mass, more preferably less than 1% by mass, and the first composition may not contain a sulfur-based reducing agent. More preferred.

  The first composition preferably uses water as a medium. The first composition can also preferably comprise further ingredients such as surfactants and / or conditioning ingredients as defined below, preferably solutions, emulsions, creams, pastes, gels or It can take the form of a mousse.

<Second composition (deodorant composition)>
The second composition is used for the treatment to eliminate the characteristic odor generated by performing the straightening treatment using the first composition, and the solubility in water is 5 mg / 100 mL-H ₂ O at 25 ° C. The above zinc salt (hereinafter referred to as water-soluble zinc salt) is included. Examples of water-soluble zinc salts include aluminum zinc oxide zinc acetate, zinc ascorbate, zinc ascorbate hydroxide, zinc borate, zinc chloride, zinc chloride hydroxide, zinc citrate, zinc cesate sulfate, zinc coco sulfate, lactic acid Examples include zinc, zinc laurate, zinc pyrrolidone carboxylate, zinc phenolsulfonate, zinc sulfate, zinc nitrate, zinc gluconate and hydrates thereof, among others, zinc acetate, zinc citrate, zinc lactate, pyrrolidone Zinc carboxylate, zinc phenolsulfonate, zinc sulfate, zinc nitrate, and zinc gluconate are preferred.

  Among these water-soluble zinc salts, from the viewpoint of penetrating into the hair and obtaining a sufficient deodorizing effect, those having a molecular weight of 70 or more are preferable, those having a molecular weight of 100 or more are more preferable, and those having 150 or more are further preferable. Also, those having a molecular weight of 600 or less are preferred, those having a molecular weight of 500 or less are more preferred, and those having a molecular weight of 450 or less are even more preferred.

The solubility of the water-soluble zinc salt in water is preferably 5 mg / 100 mL-H ₂ O or more, more preferably 100 mg / 100 mL-H ₂ O or more, and further preferably 1 g / from the viewpoint of obtaining a sufficient deodorizing effect. 100 mL-H ₂ O or more, more preferably 5 g / 100 mL-H ₂ O or more, more preferably 10 g / 100 mL-H ₂ O or more, more preferably 20 g / 100 mL-H ₂ O or more, It is preferably 700 g / 100 mL-H ₂ O or less, more preferably 600 g / 100 mL-H ₂ O or less, still more preferably 500 g / 100 mL-H ₂ O or less, still more preferably 450 g / 100 mL-H ₂ O or less.

  The second composition preferably uses water as a medium. The second composition can also suitably comprise further ingredients such as surfactants and / or conditioning ingredients as defined below. Further, the dosage form can preferably take the form of a solution, emulsion, cream, paste, gel, shampoo, conditioner, treatment, rinse, leave-in treatment, mist, spray, foam and the like.

  The value of the viscosity of the second composition is preferably 10 mPa · s or more, more preferably 100 mPa · s or more, more preferably 200 mPa · s or more, more preferably from the viewpoint of preventing the composition from dripping during application. Preferably, it is 1,000 mPa · s or more, preferably 300,000 mPa · s or less, more preferably 200,000 mPa · s or less, still more preferably 150,000 mPa · s or less, and further preferably 100,000 mPa · s or less.

  Here, the viscosity of the second composition indicates a value measured at 30 ° C. with a B-type viscometer. Specifically, if the viscosity of the second composition is up to 20,000 mPa · s, it is a B-type viscometer TVB-10M (Toki Sangyo Co., Ltd.). Viscometer TVB-10R (Toki Sangyo Co., Ltd.) and T-BAR STAGE TS-10 (Toki Sangyo Co., Ltd.) are used together, and measured using the following rotors and rotational speeds at 30 ° C after 60 seconds of rotation. It shall be. The number of revolutions is 30 rpm for viscosities up to 10 mPa · s, 60 rpm for over 10 mPa · s to 20 mPa · s, 30 rpm for over 20 mPa · s to 20,000 mPa · s, and 5 rpm for over 20,000 mPa · s. The rotor is L / Adp when the viscosity of the composition is up to 10 mPa ・ s, M1 up to over 200 mPa ・ s, up to 200 mPa ・ s, M2 up to over 1,000 mPa ・ s, and 1,000 mPa ・ s.・ M3 for s over 4,000 mPa ・ s, M4 for over 4,000 mPa ・ s over 20,000 mPa ・ s, TB for over 20,000 mPa ・ s up to 160,000 mPa ・ s, TC for over 160,000 mPa ・ s Is used.

(Thickening polymer)
The first composition and the second composition can contain a thickening polymer that can be used in hair cosmetics as long as the effects of the present invention are not impaired. Examples of the thickening polymer include a cationic thickening polymer, a nonionic thickening polymer, and an anionic thickening polymer.

  Examples of cationic thickening polymers include natural or semi-synthetic cationic polysaccharides, synthetic polymers containing amino groups or ammonium groups in the side chains of polymer chains, or diallyl quaternary ammonium salts as constituent units. Can be mentioned.

  Specific examples of the cationic polysaccharide include cationized cellulose derivatives (for example, Lion: Leogard G, GP, Dow Chemical: YUCA Polymer JR-125, JR-400, JR-30M, LR-400, LR-30M, Akzo Nobel: Cellcoat H-100, L-200), cationized guar gum derivatives (for example, Solvay: Jaguar C-13S, C-17, DSP Gokyo Food & Chemical: Labor Gum CG -M, CG-M7, CG-M8M), hydroxypropyl chitosan (for example, Ichimaru Falcos: Chitofilmer HV-10), chitosan dl-pyrrolidone carboxylate (for example, Union Carbide: Kitomer PC) Etc.

  As a synthetic cationic polymer containing an amino group or an ammonium group in the side chain of the polymer chain, trialkylaminoalkyl (meth) acrylate, trialkylaminoalkyl (meth) acrylamide, (meth) acrylamide, vinylamine or the like as a structural unit Examples include synthetic cationic polymers including methacryloyloxyethylenetrimonium chloride polymer (INCI name: Polyquaternium-37, for example, BASF: Cosmedia Ultragel 300, SALCARE SC95, Sigma 3V: synthalen CR), (acrylic acid / methyl acrylate / 3-methacryloylaminopropyltrimethylammonium chloride) copolymer (INCI name: Polyquaternium-47, eg Lubrizol: Marquat 2201), (acrylic acid / acrylamide / methyl methacrylic) Amidopropyltrimethylammonium chloride) copolymer (INCI name: Polyquaternium-53, eg Lubrizol: Marquat 2003), (Dimethylacrylamide / ethyltrimonium methacrylate methacrylate) copolymer (eg BASF: Tinobis CD), (Vinylamine / Vinyl) Alcohol) copolymers (for example, Sekisui Specialty Chemical Company: SEVOL ULTALUX AD, Mitsubishi Chemical Company: Diafix C-601) and the like.

  Examples of nonionic thickening polymers include synthetic nonionic polymers containing natural or semi-synthetic nonionic polysaccharides, vinyl alcohol, and oxyalkylene as constituent units.

  Specific examples of natural or semi-synthetic nonionic polysaccharides include reacting alkylene oxide with water-soluble natural polysaccharides such as starch, guar gum, locust bean gum, glucomannan, and cellulose, starch, guar gum, locust bean gum, etc. And water-soluble hydroxyalkylated polysaccharides. Specific examples include guar gum (for example, DSP Gokyo Food & Chemical: Fiberlon S) and pullulan (for example, Hayashibara: Pullulan PI-20). Hydroxyethyl cellulose (for example, Daicel Finechem: SE-850, Dow Chemical: Cellosize HEC QP-52000-H), methyl hydroxyethyl cellulose (Akzo Nobel: STRUCTURE CELL 12000M), hydroxypropyl cellulose (for example, Nippon Soda Co., Ltd .: HPC) -H, HPC-M, HPC-L), hydroxypropylmethylcellulose (for example, Shin-Etsu Chemical Co., Ltd .: Metroles 60SH-10000), and the like.

  Specific examples of synthetic nonionic thickening polymers containing vinyl alcohol and oxyalkylene as structural units include polyvinyl alcohol (for example, Nippon Synthetic Chemical Co., Ltd .: Gohsenol EG-40, GH-05, KH-20, NH -26), high-polymerization polyethylene glycol (for example, Dow Chemical Co .: Polyox WSR N-60K, WSR301, WSR303), (PEG-240 / decyltetradeceth-20 / HDI) copolymer (for example, ADEKA: Adecanol) GT-700)

  Anionic thickening polymers include polyacrylic acid (Noveon: Carbopol 941, 981), acrylic acid / alkyl methacrylate copolymer (Noveon: Carbopol ETD2020), lower alkyl vinyl ether / maleic anhydride Hydrolyzate of partially crosslinked polymer by terminal unsaturated diene compound of copolymer or monoalkyl ester thereof (ASHLAND: Stabilise 06, Stabilise QM), carrageenan (for example, Mitsubishi Rayon: Soagina LX22, ML210), xanthan gum (for example, Dainippon Sumitomo Pharma Co., Ltd .: Echo Gum T), Dehydroxanthan Gum (for example, AkzoNobel), Welan Gum (for example, Sanki Co., Ltd .: K1C376, K1A96), Hydroxypropyl Xanthan Gum (for example, Dainippon Sumitomo Pharma Co., Ltd .: Labor Gum EX), Stearoxy PG hydroxyethyl cellulose sulfonate Thorium, (hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer (for example, Sepic Corporation: Simalgel, Sepinobu) and the like.

  Synthetic cationic polymers containing diallyl quaternary ammonium salts as structural units include diallyldimethylammonium chloride polymers (INCI name: polyquaternium-6, for example, Lubrizol: Marquat 100), (dimethyldiallylammonium chloride / acrylamide) Copolymer (INCI polyquaternium-7, such as Lubrizol: Marquat 550, 740), (acrylic acid / diallyldimethylammonium chloride) copolymer (INCI name: Polyquaternium-22, such as Lubrizol: Marquat 280, 295), ( Acrylamide / acrylic acid / diallyldimethylammonium chloride) copolymer (INCI name: Polyquaternium-39, for example, Lubrizol Corporation: Marquat Plus 3330, 3331).

  Thickening polymers can be used alone or in combination of two or more. When the first composition and / or the second composition contains a thickening polymer, the content is based on the total amount of each of the first composition and the second composition, and the hair at the time of application. From the viewpoint of imparting good elongation and conformability with respect to, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and further preferably 0.1% by mass or more, and good operability in performing the treatment. From the viewpoint of imparting, it is preferably 5% by mass or less, more preferably 3% by mass or less, still more preferably 2.5% by mass or less, and still more preferably 2% by mass or less.

(Surfactant)
The first composition and the second composition can contain a surfactant that can be used in hair cosmetics as long as the effects of the present invention are not impaired. As the surfactant, any of a cationic surfactant, a nonionic surfactant, an amphoteric surfactant, and an anionic surfactant can be used. It is also possible to use two or more types of surfactants in combination.

Cationic surfactants are preferably mono-long chain alkyl quaternary ammonium salts having one C ₈ -C ₂₄ alkyl group and three C ₁ -C ₄ alkyl group.

  Preferably, the at least one mono long-chain alkyl quaternary ammonium surfactant is selected from compounds represented by the following general formula:

[Wherein R ¹ is a saturated or unsaturated, branched or linear alkyl chain having 8 to 22 carbon atoms, R ⁵ —CO—NH— (CH ₂ ) _n —, or R ⁵ —CO—. O— (CH ₂ ) _n — (R ⁵ is a saturated or unsaturated branched or straight chain alkyl chain having 7 to 21 carbon atoms, and n is an integer of 1 to 4),
R ² , R ³ and R ⁴ are independently of each other an alkyl group having 1 to 4 carbon atoms, a hydroxylalkyl chain having 1 to 4 carbon atoms, or an ethoxy or propoxy group (the number of ethoxy or propoxy groups). Varies between 1 to 4)
X represents chloride, bromide, methosulphate or ethosulphate. ]

  Specific cationic surfactants include, for example, cetyltrimethylammonium chloride, myristyltrimethylammonium chloride, behentrimonium chloride, trimethylcetylammonium bromide, stearyltrimethylammonium chloride, stearyltrimonium chloride, stearamidepropyltrimonium chloride and the like. Long chain quaternary ammonium compounds and the like can be mentioned, and these can be used alone or in combination of two or more.

Examples of nonionic surfactants include polyoxy-C _1-4 alkylene C _8-24 alkyl ether, polyoxy-C _1-4 alkylene C _8-24 alkenyl ether, higher (C ₁₂ -C ₂₄ ) fatty acid sucrose esters Polyglycerin C _8-24 fatty acid ester, higher (C ₁₂ -C ₂₄ ) fatty acid mono- or diethanolamide, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan C _8-24 fatty acid ester, polyoxyethylene sorbit C _{8- 24} fatty acid esters, C _8-24 alkyl saccharide surfactants, such as C _8-24 alkyl amine oxides and C _8-24 alkyl amidoamine oxides.

  Examples of amphoteric surfactants include imidazoline surfactants, carbobetaine surfactants, amide betaine surfactants, sulfobetaine surfactants, hydroxysulfobetaine surfactants and amide sulfobetaine surfactants. Agents and the like.

  Examples of anionic surfactants include alkyl benzene sulfonates, alkyl or alkenyl ether sulfates, alkyl or alkenyl sulfates, olefin sulfonates, alkane sulfonates, saturated or unsaturated fatty acid salts, alkyl or alkenyl ether carboxylates, Examples include α-sulfo fatty acid salts, N-acyl amino acid type surfactants, phosphate mono- or diester type surfactants, and sulfosuccinates. Examples of the alkyl ether sulfate include polyoxyethylene alkyl ether sulfate. Examples of counter ions of anionic residues of these surfactants include alkali metal ions (sodium ions, potassium ions, etc.); alkaline earth metal ions (calcium ions, magnesium ions, etc.); ammonium ions; Alternatively, alkanolamines having 1 to 3 alkanol groups having 3 carbon atoms (for example, monoethanolamine, diethanolamine, triethanolamine or triisopropanolamine) and the like can be mentioned.

  Surfactant can be used individually or in combination of 2 or more types. When the first composition and / or the second composition contains a surfactant, the content is preferably 0.05 mass based on the total amount of each of the first composition and the second composition. % Or more, more preferably 0.1% by mass or more, and preferably 10% by mass or less, more preferably 5% by mass or less.

(Conditioning ingredients)
The 1st composition and the 2nd composition can contain the conditioning ingredient which can be used for hair cosmetics in the range which does not inhibit the effect of the present invention. The conditioning component is an oil or polymer that adheres to the hair and improves the feel and texture of the hair.

  When the first composition and / or the second composition contains the conditioning component, the total content is preferably 0.01 mass based on the total amount of each of the first composition and the second composition. % Or more, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and preferably 30% by mass or less, more preferably 20% by mass or less, still more preferably 10% by mass or less.

  Examples of conditioning components generally include silicones, organic conditioning oils (eg, hydrocarbon oils, polyolefins, fatty acid esters and natural oils) and higher alcohols. The first composition and the second composition can include a single conditioning component or a combination of two or more components.

It is preferable that the silicone first composition and the second composition contain silicone in order to improve the feeling of use. Examples of silicone include dimethylpolysiloxane and modified silicone (for example, amino-modified silicone, fluorine-modified silicone, alcohol-modified silicone, polyether-modified silicone, epoxy-modified silicone, alkyl-modified silicone, etc.), and the like. Polyether modified silicones and amino modified silicones are preferred.

  As the dimethylpolysiloxane, any cyclic or non-cyclic dimethylsiloxane polymer can be used, for example, SH200 series, BY22-019, BY22-020, BY11-026, B22-029, BY22-034, BY22- 050A, BY22-055, BY22-060, BY22-083, FZ-4188 (all are Toray Dow Corning Co., Ltd.), KF-9008, KM-900 series, MK-15H, MK-88 (all are Shin-Etsu Chemical) Etc.).

  As the polyether-modified silicone, any silicone having a polyoxyalkylene group can be used, and the group constituting the polyoxyalkylene group can be an oxyethylene group or an oxypropylene group. More specific examples include KF-6015, KF-945A, KF-6005, KF-6009, KF-6013, KF-6019, KF-6029, KF-6017, KF-6043, KF-353A, KF- 354A, KF-355A (all Shin-Etsu Chemical Co., Ltd.), FZ-2404, SS-2805, FZ-2411, FZ-2412, SH3771M, SH3772M, SH3773M, SH3775M, SH3749, SS-280X series, BY22-008M, BY11-030, BY25-337 (both are Toray Dow Corning Co., Ltd.).

  As the amino-modified silicone, any silicone having an amino group or an ammonium group can be used, and examples thereof include amino-modified silicone oils having all or some terminal hydroxyl groups end-capped with methyl groups or the like and end-capping. Amodimethicone etc. which are not stopped are mentioned. As a preferred amino-modified silicone, for example, a compound represented by the following formula can be used.

[Wherein, R ′ represents a hydrogen atom, a hydroxyl group or R ^Z , R ^Z represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and J represents R ^Z , R ″ — (NHCH ₂ CH ₂ ) _a NH ₂ , OR ^Z or a hydroxyl group, R ″ represents a divalent hydrocarbon group having 1 to 8 carbon atoms, a represents a number of 0 to 3, and b and c are the number average of the sum. The number is from 10 to less than 20000, preferably from 20 to less than 3000, more preferably from 30 to less than 1000, and even more preferably from 40 to less than 800. ]

  Specific examples of suitable commercially available amino-modified silicones include amino-modified silicone oils (SF8452C, SS-3551 (both Toray Dow Corning Co., Ltd.), KF-8004, KF-867S, KF-8015 (all Shin-Etsu) Chemical Industry Co., Ltd.)); and amodimethicone emulsion (SM8704C, SM8904, BY22-079, FZ-4671, FZ-4672 (all are Toray Dow Corning Co., Ltd.)).

  When the first composition and / or the second composition contains silicone, the content is preferably 0.1% by mass or more based on the total amount of each of the first composition and the second composition. More preferably, it is 0.2% by mass or more, further preferably 0.5% by mass or more, preferably 20% by mass or less, more preferably 10% by mass or less, and further preferably 5% by mass or less.

The organic conditioning oil first composition and the second composition can comprise an organic conditioning oil to improve the feeling of use. Organic conditioning oils suitable for use as conditioning ingredients are preferably low viscosity, water insoluble liquids, hydrocarbon oils having at least 10 carbon atoms, polyolefins, fatty acid esters, natural oils and these Selected from mixtures. The viscosity of these organic conditioning oils is preferably 1 mPa · s or more, more preferably 2 mPa · s or more, preferably 200 mPa · s or less, more preferably 100 mPa · s or less, and even more preferably 50 mPa · s or less. is there. A capillary viscometer can be used to measure the viscosity. Here, the viscosity of the organic conditioning oil refers to a value measured at 40 ° C. using a capillary viscometer.

  Examples of hydrocarbon oils include cyclic hydrocarbons, straight chain aliphatic hydrocarbons (saturated or unsaturated) and branched aliphatic hydrocarbons (saturated or unsaturated), including these polymers or mixtures. Straight chain hydrocarbon oils preferably have 12 to 19 carbon atoms. The branched hydrocarbon oil preferably includes a hydrocarbon polymer having more than 19 carbon atoms.

  Examples of the polyolefin include liquid polyolefin, more preferably liquid poly-α-olefin, and still more preferably hydrogenated liquid poly-α-olefin. The polyolefin used in the present invention is preferably prepared by polymerizing an olefin monomer having 4 or more carbon atoms, more preferably 6 or more carbon atoms, and preferably 14 or less carbon atoms, more preferably 12 or less carbon atoms.

  As the fatty acid ester, for example, a fatty acid ester having 10 or more carbon atoms can be used. Examples of this type of fatty acid ester include esters having hydrocarbon chains derived from fatty acids and alcohols (eg, monoesters, polyhydric alcohol esters or di- and tricarboxylic acid esters). The hydrocarbon group of this fatty acid ester may have another functional group (amide group, alkoxy group, etc.) having compatibility as a substituent, or the hydrocarbon group is covalently bonded to these functional groups. It may be. More specifically, alkyl esters and alkenyl esters of fatty acids having 10 to 22 carbon atoms, carboxylic acid esters of alkyl and / or alkenyl alcohols having 10 to 22 carbon atoms, and mixtures thereof are preferably used. Specific examples of these fatty acid esters include isopropyl isostearate, hexyl laurate, isohexyl laurate, isohexyl palmitate, isopropyl palmitate, decyl oleate, isodecyl oleate, hexadecyl stearate, decyl stearate, dihexadecyl adipate, Examples include lauryl lactate, myristyl lactate, cetyl lactate, oleyl stearate, oleyl oleate, oleyl myristate, lauryl acetate, cetyl propionate, and dioleyl adipate.

  Further suitable oil components are natural oils such as liquid paraffin and natural triglycerides. Suitable natural triglycerides are argan oil, shea fat oil, karate oil, olive oil, almond oil, avocado oil, ricinus oil, coconut oil, palm oil, sesame oil, peanut oil, sunflower oil, peach kernel oil, wheat germ oil , Macadamia nut oil, macadamia oil, evening primrose oil, jojoba oil, castor oil, soybean oil, lanolin, pearl millet oil, black cumin oil, borage oil, grape seed oil, hemp seed oil, kukui nut oil and rosehip oil.

  The organic conditioning oil can be used alone or in combination of two or more, and the total content thereof is preferably 0.1% by mass or more based on the total amount of each of the first composition and the second composition More preferably, it is 0.2% by mass or more, further preferably 0.5% by mass or more, preferably 20% by mass or less, more preferably 10% by mass or less, and further preferably 5% by mass or less.

The higher alcohol first composition and the second composition may contain a higher alcohol having 8 or more carbon atoms from the viewpoint of improving the touch and stability. The carbon number of the higher alcohol is preferably 8 or more, more preferably 16 or more, and preferably 22 or less. Specific examples thereof include cetyl alcohol, stearyl alcohol, behenyl alcohol, and mixtures thereof.

  The higher alcohol can be used alone or in combination of two or more, and the content thereof is preferably 0.1% by mass or more, based on the total amount of each of the first composition and the second composition. Preferably it is 0.2 mass% or more, More preferably, it is 0.5 mass% or more, Preferably it is 20 mass% or less, More preferably, it is 10 mass% or less, More preferably, it is 5 mass% or less.

  Furthermore, a polyol can also be suitably contained in the composition. Examples of polyalkylene glycols include polyethylene glycol and polypropylene glycol, a mixture of the two can also be used, or a copolymer of ethylene oxide and propylene oxide can be used.

  Furthermore, the first composition and the second composition are preservatives, chelating agents, stabilizers, antioxidants, plant extracts, ultraviolet absorbers, vitamins, dyes conventionally used in the cosmetic field. Further ingredients such as fragrances can be included.

  Moreover, it can also provide as a hair treatment kit provided with the 1st composition described above and the 2nd composition.

<Hair treatment method>
The hair treatment method of the present invention includes a hair straightening step (steps 1 to 3) and a deodorizing step (steps 4 to 5).

  The straightening step achieves semipermanent straightening by using glyoxylic acids as active ingredients. This straightening effect is not achieved by the cleavage of disulfide bonds by reduction or the action of strong alkali. Therefore, neither a reducing composition nor an alkaline relaxer (lanthioninating agent) is required.

  In step 1, the first composition (straightening composition) is applied to the hair. The mass ratio of the hair to the first composition (hair: first composition) is preferably 0.5: 2 to 2: 0.5, more preferably 0.5: 1, from the viewpoint of sufficiently expressing the straightening effect. ˜1: 0.5, more preferably about 1: 1.

  In Step 2, the hair to which the first composition is applied is preferably left at a temperature of 20 to 45 ° C, more preferably at room temperature (25 ° C). The standing time is preferably 1 minute or longer, more preferably 5 minutes or longer, more preferably 10 minutes or longer, more preferably 15 minutes or longer, and preferably 120 minutes or longer from the viewpoint of sufficiently expressing the straightening effect. It is not more than minutes, more preferably not more than 90 minutes, still more preferably not more than 60 minutes, further preferably not more than 45 minutes. The time for which the first composition is left on the hair depends on the type of hair, ie whether the hair is damaged or resistant. The neglected time is the time from the end of step 1 to the start of the next step.

  After step 2 and before step 3, the hair can optionally be heat-dried so that water vapor is not excessively generated when heating the hair in step 3. Usually, for this purpose, it is preferable to use a warming device such as a hair dryer, which has a hair surface temperature not exceeding 120 ° C. when heated. It is preferable to dry the hair while continuously combing it with hands, combs or the like so that the hair does not get tangled.

  Further optionally, the hair can be rinsed with water between steps 2 and 3 and dried again.

  In step 3, the hair is heated with a high-temperature heating apparatus. Usually, a hair iron, preferably a straight iron, can be used for this purpose. In order to prevent damage to the hair, the plate surface temperature of the hair iron is preferably 250 ° C. or lower, more preferably 230 ° C. or lower. In order to obtain a sufficient straightening effect, the temperature of the hair iron is preferably 130 ° C. or higher, more preferably 150 ° C. or higher, and still more preferably 170 ° C. or higher. The surface temperature of the hair iron is preferably 180 ± 50 ° C, more preferably 170 to 230 ° C.

  After step 3, the hair can optionally be rinsed with water. After this rinsing, it can optionally be shampooed. It can also be optionally dried after this rinse or shampoo.

  The deodorizing step is performed after the straightening step.

  In step 4, the second composition (deodorant composition) is applied to the hair. The mass ratio of the hair to the second composition (hair: second composition) is preferably 0.5: 2 to 2: 0.5, more preferably 0.5: 1 to 1: 0.5, and even more preferably about 1: 1. It is.

  In step 5, the hair to which the second composition is applied is left for a certain period of time. The standing time here is preferably 1 minute or more, more preferably 5 minutes or more, and preferably 45 minutes or less, more preferably 30 minutes or less, from the viewpoint of convenience in performing the treatment. Preferably it is 20 minutes or less.

  After step 5, the hair can be left or dried without rinsing, and optionally the hair can be rinsed with water. After this rinsing, it can optionally be shampooed. It can also be optionally dried after this rinse or shampoo. From the viewpoint of ease of treatment and shortening of the treatment time, it is preferable to leave or dry the hair as it is without rinsing, the point that the deodorizing effect immediately after the treatment is higher, and the hair after the treatment has a more natural feel Is preferably rinsed with water, optionally shampooed and dried.

  With respect to the embodiments described above, preferred aspects of the present invention will be further disclosed below.

<1>
A hair treatment method comprising steps 1 to 5 performed in the following order.
1. 1. Applying a first composition that is acidic and contains one or more selected from glyoxylic acid, glyoxylic acid hydrate, glyoxylate and glyoxylamide to hair. 2. leave the hair to which the first composition is applied; 3. heating the hair 4. Applying to the hair a second composition comprising a zinc salt having a solubility in water of at least 5 mg / 100 mL-H ₂ O at 25 ° C. Leaving the hair to which the second composition is applied

<2>
The molecular weight of the zinc salt contained in the second composition is preferably 70 or more, more preferably 100 or more, still more preferably 150 or more, and preferably 600 or less, more preferably 500 or less, still more preferably 450 or less. The hair treatment method according to <1>.

<3>
The solubility of the zinc salt contained in the second composition in water is preferably 100 mg / 100 mL-H ₂ O or more, more preferably 1 g / 100 mL-H ₂ O or more, more preferably 5 g / 100 mL at 25 ° C. -H ₂ O or more, more preferably 10 g / 100 mL-H ₂ O or more, more preferably 20 g / 100 mL-H ₂ O or more, preferably 700 g / 100 mL-H ₂ O or less, more preferably 600 g / The hair treatment method according to <1> or <2>, which is 100 mL-H ₂ O or less, more preferably 500 g / 100 mL-H ₂ O or less, more preferably 450 g / 100 mL-H ₂ O or less.

<4>
The zinc salt contained in the second composition is one or more selected from zinc acetate, zinc citrate, zinc lactate, zinc pyrrolidonecarboxylate, zinc phenolsulfonate, zinc sulfate, zinc nitrate and zinc gluconate The hair treatment method according to any one of <1> to <3>.

<5>
In step 5, the time for leaving the hair to which the second composition is applied is preferably 1 minute or more, more preferably 5 minutes or more, and preferably 45 minutes or less, more preferably 30 minutes or less, The hair treatment method according to any one of <1> to <4>, more preferably 20 minutes or less.

<6>
The hair treatment method according to any one of <1> to <5>, wherein the hair is preferably left or dried without rinsing with water after step 5.

<7>
After step 5, preferably the hair is rinsed with water, and the hair treatment method according to any one of <1> to <5>.

<8>
The hair treatment method according to any one of <1> to <7>, wherein the hair is preferably heat-dried after Step 2 and before Step 3.

<9>
The high-temperature heating apparatus used in step 3 is preferably a hair having a plate surface temperature of 250 ° C. or lower, more preferably 230 ° C. or lower, preferably 130 ° C. or higher, more preferably 150 ° C. or higher, and still more preferably 170 ° C. or higher. The hair treatment method according to any one of <1> to <8>, which is an iron.

<10>
After step 3, the hair treatment method according to any one of <1> to <9>, preferably rinsing the hair with water.

<11>
The content of the compound selected from glyoxylic acid, glyoxylic acid hydrate, glyoxylic acid salt and glyoxylamide in the first composition is preferably 0.1% by mass or more, more preferably 0.5% by mass, in terms of glyoxylic acid equivalent. Or more, more preferably 1% by mass or more, further preferably 2.5% by mass or more, and preferably 40% by mass or less, more preferably 30% by mass or less, still more preferably 25% by mass or less, and further preferably 20% by mass. % Or less, The hair processing method in any one of <1>-<10>.

<12>
The pH at 25 ° C. of the first composition is preferably 4.0 or less, more preferably 3.0 or less, further preferably 2.5 or less, and preferably 0.5 or more, more preferably 1.0 or more, <1> to <11> The hair treatment method according to any one of the above.

<13>
A first composition containing one or more selected from glyoxylic acid, glyoxylic acid hydrate, glyoxylate and glyoxylamide, which is acidic, and a solubility in water of 5 mg / 100 mL-H at 25 ° C. A hair treatment kit comprising a second composition comprising a zinc salt that is ₂ O or more.

<14>
Use of the hair treatment kit according to <13> for straightening hair.

Examples 1-2 and Comparative Examples 1-2
Treatment agents A to C shown in Table 1 below were prepared and subjected to various evaluations.

(Evaluation hair bundle)
Using Caucasian hair with no chemical treatment history, a hair bundle having a length of 8 cm, a width of 2 cm, and a weight of 1.5 g was prepared and used for evaluation.

[Example 1]
(Straightening treatment)
Treatment agent A was applied to the evaluation hair bundle at a mass ratio of 1: 1, rubbed into the hair bundle, covered with a wrap and sealed, and left at room temperature for 20 minutes. Subsequently, the wrap was removed, and the hair bundle was dried with warm air from a hair dryer (Panasonic, model number EH5101P) for 1 minute. Next, the hair bundle was heated with a straight iron (manufactured by Taiff, model number TITANIUM450) having an actually measured temperature of 230 ° C. Immediately afterwards, the hair was rinsed with water, 1.5 g of a model shampoo having the following formulation was applied, washed for 1 minute, rinsed with tap water at 40 ° C. for 30 seconds, and then excess water was wiped off with a towel. The temperature of the straight iron was measured using a TX10 manufactured by Yokogawa Meter & Instruments.

(Treatment with deodorant composition)
Apply the treatment agent B shown in Table 1 to the hair after the straightening treatment so that the mass ratio of the hair to the composition (hair: second composition) is 1: 1, and wrap the entire hair bundle And then sealed and left at room temperature for about 5 minutes. Thereafter, it was rinsed with water at 40 ° C. and towel-dried. The hair bundle was evaluated for the deodorizing effect immediately after and the deodorizing effect after 1 week by the following evaluation method.

Formula shampoo ingredients (mass%)
Polyoxyethylene (2.5) sodium lauryl ether sulfate 15.5
Lauric acid diethanolamide 2.28
Edetate disodium 0.1
Sodium benzoate 0.5
Oxybenzone 0.03
Phosphoric acid 0.075
Dibutylhydroxytoluene 0.01
Sodium chloride 0.8
Purified water Total remaining 100

(Evaluation method of deodorizing effect immediately after treatment)
The scent of the hair bundle immediately after the treatment was sniffed and evaluated according to the following 5 levels.
1: Very strong odor (no deodorant effect)
2: Slightly odor 3: Slightly odor 4: Little odor 5: No odor at all

(Evaluation method of deodorizing effect after 1 week)
The hair bundle evaluated for the deodorizing effect immediately after the treatment was dried for 1 minute by a hair dryer (manufactured by Panasonic, model number EH5101P) and allowed to stand at room temperature for 1 week. Thereafter, the hair bundle was wetted with tap water at 40 ° C. for 1 minute, towel-dried, and then evaluated by the same method and evaluation criteria as the deodorizing effect immediately after.

[Example 2]
The same operation and evaluation as in Example 1 were performed except that the treatment agent C was used instead of the treatment agent B as the deodorant composition in Example 1.

[Comparative Example 1]
After performing the straightening process similar to Example 1, the same evaluation as Example 1 was performed without applying the deodorant composition.

[Comparative Example 2]
After performing the operation similar to the process by the deodorizing composition in Example 1 using the processing agent C, the same operation as the straightening process in Example 1 was performed. Subsequently, the same evaluation as Example 1 was performed.

Claims (12)

A hair treatment method comprising steps 1 to 5 performed in the following order.
1. 1. Applying a first composition that is acidic and contains one or more selected from glyoxylic acid, glyoxylic acid hydrate, glyoxylate and glyoxylamide to hair. 2. leave the hair to which the first composition is applied; 3. heating the hair with a high-temperature heating device 4. Applying to the hair a second composition comprising a zinc salt having a solubility in water of at least 5 mg / 100 mL-H ₂ O at 25 ° C. Leaving the hair to which the second composition is applied   The hair treatment method according to claim 1, wherein the molecular weight of the zinc salt in the second composition is 70 or more and 600 or less.   The hair treatment method according to claim 1 or 2, wherein in step 5, the time for leaving the hair to which the second composition is applied is from 1 minute to 45 minutes.   The hair treatment method according to any one of claims 1 to 3, wherein the hair is left or dried after rinsing without rinsing with water.   The hair treatment method according to claim 1, wherein the hair is rinsed with water after step 5.   The hair treatment method according to any one of claims 1 to 5, wherein the pH of the first composition is 4.0 or less.   The hair treatment method according to any one of claims 1 to 6, wherein the glyoxylic acid content in the first composition is 0.1% by mass or more and 40% by mass or less in terms of glyoxylic acid.   The hair treatment method according to claim 1, wherein the hair is dried after step 2 and before step 3.   The hair treatment method according to claim 1, wherein after step 3 and before step 4, the hair is rinsed with water.   The hair treatment method according to any one of claims 1 to 9, wherein the high-temperature heating apparatus used in step 3 is a hair iron having a surface temperature of 130 ° C or higher and 250 ° C or lower. A first composition containing one or more selected from glyoxylic acid, glyoxylic acid hydrate, glyoxylate and glyoxylamide, which is acidic, and a solubility in water of 5 mg / 100 mL-H at 25 ° C. A hair treatment kit comprising a second composition comprising a zinc salt that is ₂ O or more.   Use of the hair treatment kit according to claim 11 for straightening hair.