Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
  • A61K8/731—Cellulose; Quaternized cellulose derivatives
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/10—Preparations for permanently dyeing the hair
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
  • A61K8/365—Hydroxycarboxylic acids; Ketocarboxylic acids
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/67—Vitamins
  • A61K8/676—Ascorbic acid, i.e. vitamin C
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • A61K8/8152—Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/02—Preparations for cleaning the hair
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/08—Preparations for bleaching the hair
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/48—Thickener, Thickening system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/52—Stabilizers
  • A61K2800/522—Antioxidants; Radical scavengers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
  • A61K2800/88—Two- or multipart kits
  • A61K2800/884—Sequential application

Definitions

• the present invention relates to a hair treatment method, and more particularly to a hair treatment method for protecting the scalp from damage caused by a hair color composition, a hair bleach composition, a perm composition or a relaxer composition.
• Patent Document 1 discloses a scalp isolation composition used before hair coloring / perm and a method for using the same, which comprises a nonionic surfactant, a water-soluble polymer, an antioxidant, and a pH buffer. ing.
• Patent Document 1 Chinese Patent Application Publication No. 107837212
• the present invention provides a hair treatment method including the following steps 1 and 2, wherein the step 2 is performed after the step 1.
• Step 1 Contains the following components (A) to (C) and has a pH of 4.1 (meaning that the pH is "pH at 25 ° C.” unless otherwise specified in the present specification).
• Step of applying a cosmetic composition of 1 to 30,000 mPa ⁇ s to the scalp (A) pH buffer (B) antioxidant, and (C) pH-responsive thickener (step 2) Hair color composition, hair bleach A step of applying at least one hair treatment agent composition selected from a composition, a perm composition and a relaxer composition to hair.
• the present invention also provides a cosmetic composition for protecting the scalp, which comprises the following components (A) to (C) and has a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s.
• A pH buffer
• B antioxidant
• C pH-responsive thickener
• the present invention comprises at least one hair treatment agent composition selected from the group consisting of a hair color composition, a hair bleach composition, a perm composition and a relaxer composition, and the above-mentioned cosmetic composition of the present invention.
• a hair treatment agent composition selected from the group consisting of a hair color composition, a hair bleach composition, a perm composition and a relaxer composition, and the above-mentioned cosmetic composition of the present invention.
• composition shown in Patent Document 1 and the method of using the composition reduce or alleviate the damage caused by a hair treatment agent such as a hair coloring agent, but there is room for further improvement in protection to the scalp.
• a hair treatment agent such as a hair coloring agent
• research has revealed that the composition has a problem of reducing the dyeing power of the hair coloring agent.
• the present inventor contains a pH buffer, an antioxidant, and a pH-responsive thickener before applying the hair treatment composition, and has a pH of 1 to 30,000 mPa ⁇ s of 4.1.
• the cosmetic composition is applied to the scalp before the hair treatment is performed, so that the scalp protection ability can be significantly improved, and the hair treatment agent can be significantly improved.
• the damage to the scalp caused by the composition can be reduced or alleviated.
• the cosmetic composition used does not reduce the hair treatment effect to be achieved even after application to the scalp, and can be maintained satisfactorily. For example, when a hair color composition is applied, an excellent dyeing effect can be maintained.
• the present invention can maintain a good balance between the coatability and the dripping property of the cosmetic composition, and can improve the convenience of use by the user.
• the cosmetic composition of the present invention is uniformly applied to the scalp, and the hair treatment agent composition (for example, a composition such as a hair coloring agent, a hair bleaching agent, a perm agent, a relaxor agent, etc.) is applied to the hair. It then provides a method of hair treatment (eg, hair coloring, hair bleaching, perms, relaxers, etc.), optionally rinsing and drying as needed.
• the hair treatment agent composition for example, a composition such as a hair coloring agent, a hair bleaching agent, a perm agent, a relaxor agent, etc.
• the hair treatment method of the present invention includes the following steps 1 and 2, and the step 2 is performed after the step 1.
• Step 1 A step of applying a cosmetic composition to the scalp, which contains the following components (A), (B) and (C) and has a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s (A) pH buffering.
• Agent and (B) Antioxidant and (C) pH-responsive thickener A step of applying at least one hair treatment agent composition selected from a hair color composition, a hair bleach composition, a perm composition and a relaxer composition to hair.
• the present invention can apply the cosmetic composition used in step 1 before applying the hair treatment agent composition, thereby protecting the scalp from damage caused by hair treatment. .. Moreover, since the cosmetic composition does not affect the hair treatment, an excellent hair treatment effect can be maintained.
• hair treatment examples include hair treatment including chemical treatment using an alkaline treatment agent, and specific examples thereof include hair treatment such as hair coloring, hair bleaching, perm, and relaxer.
• the relaxer treats curly hair with a hair treatment agent containing an alkaline agent such as sodium hydroxide and guanidine hydroxide under strong alkaline conditions to relax and straighten the hair.
• a hair treatment agent containing an alkaline agent such as sodium hydroxide and guanidine hydroxide under strong alkaline conditions to relax and straighten the hair.
• Is. Perm is a first solution containing a reducing substance such as thioglycolate or cysteine or an alkaline agent to cleave the cystine bond in the hair to swell and soften the hair and wrap it around a rod or the like (wave perm).
• the cystine bond is reformed with a second solution containing an oxidizing agent such as bromate or hydrogen peroxide.
• a first agent containing an alkaline agent and an oxidative dye intermediate and a second agent containing an oxidizing agent such as hydrogen peroxide are mixed, and the obtained mixture is applied to the hair to dye the hair. Hair treatment to be done.
• Hair bleach is a hair treatment in which a first agent containing an alkaline agent and a second agent containing an oxidizing agent such as hydrogen peroxide are mixed, and the obtained mixture is applied to the hair to decolorize the hair.
• Granulations such as persulfate may be used in combination with hair coloring and hair bleaching in order to improve bleaching power.
• the cosmetic composition may be applied to the scalp, and may be applied to a dry scalp or a wet scalp. Since the cosmetic composition of the present invention does not have a great influence on the hair treatment in step 2 and does not irritate the scalp, a part of the cosmetic composition may be applied near the root of the hair.
• the range to which the cosmetic composition is applied may be any range as long as the hair treatment agent composition can come into contact with the scalp in step 2, and may be the entire scalp or a part of the scalp.
• the amount of the cosmetic composition applied to the scalp is preferably in the range of 8 to 40 ⁇ l / cm 2 , preferably in the range of 13 to 27 ⁇ l / cm 2 , and 20 to 27 ⁇ l / cm 2 from the viewpoint of obtaining a sufficient scalp protective effect. It is more preferable that the range is.
• a pretreatment such as the hair cosmetic described in JP-A-2019-123710 can be appropriately applied between the steps 1 and 2, but the cosmetic composition used in the step 1 is washed away. Does not include the process.
• the time for performing the hair treatment in the step 2 is not particularly limited, and the hair treatment may be performed immediately after the cosmetic composition used in the step 1 is applied to the scalp, or after a few minutes to several hours have elapsed. The hair treatment may be performed. From the viewpoint of maintaining the hair treatment effect to be achieved and sufficiently obtaining the scalp protection effect, it is preferable to perform step 2 immediately after applying the scalp with the cosmetic composition used in step 1.
• the mass of the hair treatment agent composition applied to the hair in step 2 is a bath ratio (mass of the hair treatment agent composition / mass of the hair) to the mass of the hair, and is preferably 0.05 or more, more preferably 0.10. Above, more preferably 0.25 or more, still more preferably 0.5 or more, still more preferably 100 or less, more preferably 90 or less, still more preferably 40 or less, still more preferably 5 or less, still more preferably 3 or less. More preferably, it is 2 or less.
• the treatment time is preferably 1 minute or longer, more preferably 3 minutes or longer, still more preferably 5 minutes or longer, and preferably 5 minutes or longer, from the viewpoint of promoting the penetration of the hair treatment agent composition and enhancing the treatment effect. Is 1 hour or less, more preferably 30 minutes or less, still more preferably 20 minutes or less. At this time, heating may be performed from the viewpoint of promoting the penetration of the first agent. When heating, it is preferable to heat at 40 to 90 ° C.
• step 2 After step 2, if necessary, it may be rinsed with water, washed with shampoo, rinsed, etc. as appropriate. Further, treatment, rinsing, etc. may be performed with a rinse, conditioner, or the like. After that, it is preferable to dry the towel after removing excess water.
• step 1 The cosmetic composition used in step 1 will be described below.
• the component (A) is a pH buffer, and is not particularly limited, but a buffer solution of a conjugated acid-base pair is preferable. Specifically, monocarboxylic acids such as acetic acid and propionic acid and salts thereof; dicarboxylic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid and phthalic acid and salts thereof; polyglutamic acid and the like.
• Polycarboxylic acid and its salts Polycarboxylic acid and its salts; hydroxycarboxylic acids such as glycolic acid, lactic acid, hydroxyacrylic acid, glyceric acid, malic acid, tartaric acid, citric acid and their salts; acidic amino acids such as glutamate and aspartic acid and their salts; hydrochloric acid, phosphorus Inorganic acids such as acids and sulfuric acids and their salts; examples include barbituric acid and its salts.
• the salt of the above acid is not particularly limited, and examples thereof include alkali metal salts such as sodium salt and potassium salt. These pH buffers may be used alone or in combination of two or more.
• an alkaline hair treatment agent is generally used for hair treatment such as hair coloring
• the pH of the scalp tends to rise during the hair treatment, which causes irritation. Therefore, from the viewpoint of suppressing an increase in pH of the scalp, it is preferable to use a pH buffer having a buffering ability of at least between pH 4.5 and 5.5.
• the component (A) includes succinic acid and its above. Salt, malic acid and its salts, citric acid and its salts, or any combination of the above acids and salts thereof is preferred, citric acid and its salts are more preferred, and citric acid and sodium citrate are even more preferred.
• the content of the component (A) (in the case of a conjugated acid-base pair, the total content thereof) is applied to the entire cosmetic composition from the viewpoint of improving the scalp protective ability and maintaining the hair treatment effect to be achieved.
• it is more than 0.15% by mass, preferably 0.2% by mass or more, more preferably 0.5% by mass or more, still more preferably 1.0% by mass or more, still more preferably 1.5% by mass or more. ..
• 10.0% by mass or less preferably 9.0% by mass or less, more preferably 8.0% by mass or less, still more preferably 6.0% by mass or less, still more preferably 4. It is 0% by mass or less.
• more than 0.15% by mass and 10.0% by mass or less preferably 0.2% by mass or more and 9.0% by mass or less, more preferably 0.5% by mass or more and 8 0.0% by mass or less, still more preferably 1.0% by mass or more and 6.0% by mass or less, still more preferably 1.0% by mass or more and 4.0% by mass or less, still more preferably 1.5% by mass or more 4 It is 0.0% by mass or less.
• the component (B) is an antioxidant and is not particularly limited, but for example, vitamin E such as dibutyl hydroxytoluene, butyl hydroxyanisole, and ⁇ tocopherol or a derivative thereof (specific examples include tocopherol acetate and the like.
• the salt of the above acid is not particularly limited, and examples thereof include alkali metal salts such as sodium salt and potassium salt.
• ascorbic acid or its component (B) is used as the component (B) from the viewpoint of improving the scalp protection ability, maintaining a good balance between coatability and dripping property, and maintaining the hair treatment effect to be achieved.
• Salts or derivatives, dibutylhydroxytoluene, catechin are preferred, ascorbic acid or salts or derivatives thereof (eg, ascorbic acid glucoside, ascorbic acid phosphate magnesium, erythorbic acid, sodium erythorbate) are more preferred, ascorbic acid, ascorbic acid glucoside. Is even more preferable.
• the total content of the component (B) is a cosmetic composition from the viewpoint of improving the scalp protective ability, maintaining a good balance between coatability and dripping property, and maintaining the hair treatment effect to be achieved. With respect to the whole, for example, it is 0.01% by mass or more, preferably 0.1% by mass or more, and more preferably 0.2% by mass or more. From the same viewpoint, for example, 5.0% by mass or less, preferably 3.0% by mass or less, more preferably 1.5% by mass or less, still more preferably 1.0% by mass or less, still more preferably 0. It is 7% by mass or less.
• 0.01% by mass or more and 5.0% by mass or less preferably 0.1% by mass or more and 3.0% by mass or less, more preferably 0.2% by mass or more 1 It is 5.5% by mass or less, more preferably 0.2% by mass or more and 1.0% by mass or less, still more preferably 0.2% by mass or more and 0.7% by mass or less.
• the total content of the component (A) and the component (B) is, for example, 0.2% by mass with respect to the entire cosmetic composition from the viewpoint of improving the scalp protective ability and maintaining the hair treatment effect to be achieved.
• % Or more is preferable, 1.0% by mass or more is more preferable, 2.3% by mass or more is further preferable, and even more preferably 2.5% by mass or more.
• 10.0% by mass or less preferably 8.0% by mass or less, more preferably 6.0% by mass or less, still more preferably 5.5% by mass or less, still more preferably 5. It is 0% by mass or less, more preferably 4.5% by mass or less, still more preferably 4.0% by mass or less.
• 0.2% by mass or more and 10.0% by mass or less preferably 1.0% by mass or more and 8.0% by mass or less, more preferably 2.3% by mass or more and 6. 4. 0% by mass or less, more preferably 2.3% by mass or more and 5.5% by mass or less, still more preferably 2.5% by mass or more and 5.0% by mass or less, still more preferably 2.5% by mass or more. It is 5% by mass or less, and more preferably 2.5% by mass or more and 4.0% by mass or less.
• the mass ratio of the component (A) to the component (B) is, for example, 1. It is 0 or more, preferably 1.1 or more, more preferably 1.5 or more, still more preferably 2.0 or more, and even more preferably 3.0 or more. From the same viewpoint, for example, it is 8.0 or less, preferably 7.5 or less, more preferably 6.5 or less, still more preferably 6.0 or less, still more preferably 5.0 or less. More specifically, from the above viewpoint, for example, 1.0 or more and 8.0 or less, preferably 1.1 or more and 7.5 or less, more preferably 1.5 or more and 6.5 or less, still more preferably 2.0. It is 6.0 or more, more preferably 3.0 or more and 5.0 or less.
• the component (C) is a pH-responsive thickener, and the viscosity of the cosmetic composition can be increased as the pH of the cosmetic composition increases.
• the component (C) is not particularly limited, but is preferably an ionic water-soluble polymer, more preferably an alkali-thickening ionic water-soluble polymer, from the viewpoint of improving the scalp protective ability.
• the dissociation group contained therein is not dissociated or dissociates only in a small amount, so that the viscosity does not increase so much, but sodium hydroxide, potassium hydroxide, and birds
• a base such as ethanolamine
• the viscosity of the pH-responsive thickener increases with increasing pH, at least in a part or all of the pH range of 3 to 7.
• the pH-responsive thickener is more preferably an ionic water-soluble polymer having at least one selected from an unneutralized carboxyl group and an unneutralized sulfonic acid group, and more preferably at least unneutralized. It is an ionic water-soluble polymer having a Japanese carboxyl group. For example, linear or fractionated acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, styrene sulfonic acid, vinyl benzoic acid, 2-acrylamide-2-methyl-1-propane sulfonic acid, dimethylol propionic acid and the like. Examples thereof include a branched polymer, a crosslinked polymer thereof, and a copolymer thereof.
• an acrylic polymer or copolymer such as polyacrylic acid, carboxyvinyl polymer, sodium polyacrylate, acrylic acid / alkyl methacrylate copolymer; polymethacrylic acid, methacrylic acid / alkyl methacrylate copolymer; Examples thereof include a methacrylic acid-based polymer such as a coalescence or a copolymer.
• pH-responsive thickeners may be used alone or in combination of two or more.
• the component (C) includes methacrylic acid / methacrylic acid alkyl copolymer and methacrylic acid / alkyl methacrylate.
• Copolymers and carboxyvinyl polymers are preferable, and carboxyvinyl polymers are more preferable.
• Examples of commercially available carboxyvinyl polymers include the Carbomer series, for example, Carbopol 910, Carbopol 934, Carbopole 940, Carbopole 941, Carbopole 980, Carbopole 981 (above Lubrizol Advanced). Materials, Inc.) and the like.
• Examples of commercially available products of the acrylic acid / alkyl methacrylate copolymer include Carbopol 1382, Carbopole ETD2020, PEMULEN TR-1, PEMULEN TR-2 (all manufactured by Lubrizol Advanced Materials, Inc.) and the like.
• the total content of the component (C) is, for example, 0.1% by mass or more with respect to the entire cosmetic composition from the viewpoint of improving the scalp protective ability and maintaining a good balance between coatability and dripping property. , Preferably 0.2% by mass or more. From the same viewpoint, for example, 3.0% by mass or less, preferably 2.5% by mass or less, more preferably 2.0% by mass or less, still more preferably 1.7% by mass or less, still more preferably 1. It is 5% by mass or less. More specifically, for example, 0.1% by mass or more and 3.0% by mass or less, preferably 0.1% by mass or more and 2.5% by mass or less, more preferably 0.1% by mass or more and 2.0% by mass or less. It is more preferably 0.2% by mass or more and 1.7% by mass or less, and even more preferably 0.2% by mass or more and 1.5% by mass or less.
• the cosmetic composition used in step 1 can further contain a (D) thickener different from the component (C), and is preferably non-ionic.
• a thickener such as a water-soluble polymer or an ionic water-soluble polymer that does not show an extreme change in viscosity between pH 3 and 7.
• the ionic water-soluble polymer is preferably a salt type from the viewpoint of viscosity stability.
• natural polymers, semi-synthetic polymers, synthetic polymers can be mentioned.
• the natural polymer examples include anionic water-soluble polymers such as xanthan gum, carrageenan and alginic acid, and nonionic water-soluble polymers such as starch.
• the semi-synthetic polysaccharide polymer include nonionic water-soluble polymers such as hydroxycellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose and methylcellulose, stearoxy PG hydroxyethylcellulosesulfonate Na, sodium carboxymethylcellulose and the like. Examples thereof include anionic water-soluble polymers and cationic water-soluble polymers such as cationized cellulose.
• the synthetic polymer include nonionic water-soluble polymers such as polyvinylpyrrolidone and polyvinyl alcohol, and cationic water-soluble polymers such as cationized polyvinylpyrrolidone. These thickeners may be used alone or in combination of two or more.
• commercially available hydroxypropyl cellulose products include HPC-M and HPC-H (manufactured by Nippon Soda), and commercially available products of sodium carboxymethyl cellulose include CMC dicel (manufactured by Daicel Chemical Industries), stearoxy PG hydroxyethyl cellulose sulfonic acid.
• Examples of commercially available Na products include Poise 310 (manufactured by Kao Co., Ltd.), and examples of commercially available xanthan gum products include xanthan gum food grade and xanthan gum CS (manufactured by Jungbunzlauer).
• the component (D) includes xanthan gum, hydroxyethyl cellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, stearoxy PG hydroxyethyl cellulose sulfonate Na, polyvinylpyrrolidone, and polyvinyl. Alcohol is preferable, and stearoxy PG hydroxyethyl cellulose sulfonate Na, xanthan gum, and hydroxyethyl cellulose are more preferable.
• the total content of the component (D) is, for example, 0.1% by mass or more, preferably 0.2% by mass or more, based on the entire cosmetic composition, from the viewpoint of maintaining a good balance between coatability and dripping property. Is. From the same viewpoint, for example, it is 5.0% by mass or less, preferably 4.0% by mass or less, more preferably 3.0% by mass or less, and further preferably 2.5% by mass or less. More specifically, from the above viewpoint, for example, 0.1% by mass or more and 5.0% by mass or less, preferably 0.1% by mass or more and 4.0% by mass or less, more preferably 0.2% by mass or more 3 It is 0.0% by mass or less, more preferably 0.2% by mass or more and 2.5% by mass or less.
• the cosmetic composition used in step 1 can contain an aqueous medium on demand in order to improve compatibility between the ingredients.
• the aqueous medium is an organic solvent compatible with water, such as lower alcohols such as ethanol and isopropyl alcohol; low molecular weight diols having 6 or less carbon atoms such as 1,3-butylene glycol, glycerin, ethylene glycol and propylene glycol. Triol, as well as mixtures thereof, may be mentioned.
• the content of the aqueous medium in the cosmetic composition is, for example, 10.0% by mass or less, preferably 5.0% by mass or less, more preferably 4 with respect to the entire cosmetic composition from the viewpoint of reducing irritation to the scalp. It is most preferably 0.0% by mass or less, more preferably 3.0% by mass or less, still more preferably 2.0% by mass or less, still more preferably 1.0% by mass or less, and substantially not contained.
• the cosmetic composition used in step 1 contains water.
• water tap water, deionized water, distilled water and the like can be used.
• the content of water in the cosmetic composition can be appropriately adjusted depending on the content of other components, and is preferably 50% by mass or more, more preferably 60% by mass or more, based on the entire cosmetic composition. Further, 99.8% by mass or less is preferable, and 98% by mass or less is more preferable. More specifically, it is preferably 50% by mass or more and 99.8% by mass or less, and more preferably 60% by mass or more and 98% by mass or less.
• Surfactants are not essential ingredients, but surfactants can be used as needed to improve compatibility between the ingredients.
• the surfactant is not particularly limited, and examples thereof include ordinary cationic surfactants, anionic surfactants, nonionic surfactants, amphoteric surfactants and the like.
• the total content of the surfactant is set with respect to the entire cosmetic composition. For example, less than 5.0% by weight, preferably less than 4.0% by weight, more preferably less than 3.0% by weight, even more preferably less than 2.0% by weight, even more preferably less than 1.0% by weight. Most preferably, it is not substantially contained.
• the components used in a normal cosmetic composition can be appropriately blended according to a desired effect.
• optional components include, for example, vitamin preparations other than the component (B); bactericides; glycyrrhizinic acid such as dipotassium glycyrrhizinate and its salts, anti-inflammatory agents such as glycyrrhetinic acid and its salts; Preservatives; Chelating agents excluding component (A); Moisturizers such as sorbitol, pantenol; Stabilizers; Eucalyptus extracts such as polar solvent extracts of eucalyptus, conchiolin or its hydrolyzate, honey, royal jelly, silk Protein or its hydrolyzate, protein-containing extract obtained from seeds of legumes, oyster carrot extract, rice germ extract, hibamata extract, aloe extract, hass extract, pomegranate extract, Novara
• the viscosity of the cosmetic composition used in step 1 will be described below.
• the cosmetic composition used in step 1 is preferably a liquid or gel-like composition.
• the pH of the hair composition is preferably close to the pH of the scalp (3.5 to 6.0) in order to alleviate the irritation to the scalp when the hair composition is applied.
• the pH of a commonly used alkaline hair treatment agent hair coloring agent, etc.
• the hair treatment effect is also lowered, and the desired effect cannot be obtained.
• the hair color composition and the hair bleach composition produce a hair treatment effect by a redox reaction with an oxidizing agent, the hair treatment effect may be reduced in a system in which an antioxidant is present. Maintaining the treatment effect, protecting the scalp, and alleviating irritation to the scalp are issues to be solved in this technical field.
• the present inventor can obtain an excellent scalp protective ability and maintain a desired hair treatment effect by setting the viscosity of the cosmetic composition used in step 1 at pH 4.1 within a specific range. I found.
• the viscosity of the cosmetic composition used in step 1 varies depending on the content and proportion of the above components, but from the viewpoint of improving the scalp protection ability and the viewpoint of maintaining a good balance between coatability and dripping property. Therefore, the viscosity of the cosmetic composition used in step 1 at pH 4.1 is preferably 1 mPa ⁇ s or more, more preferably 10 mPa ⁇ s or more, still more preferably 100 mPa ⁇ s or more, still more preferably 300 mPa ⁇ s or more. It is particularly preferably 800 mPa ⁇ s or more, and particularly preferably 1500 mPa ⁇ s or more.
• it is preferably 30,000 mPa ⁇ s or less, more preferably 25,000 mPa ⁇ s or less, still more preferably 20000 mPa ⁇ s or less, still more preferably 15,000 mPa ⁇ s or less, particularly preferably 10000 mPa ⁇ s or less, and particularly preferably 10000 mPa ⁇ s or less. It is 5000 mPa ⁇ s or less, particularly preferably 2500 mPa ⁇ s or less.
• the viscosity can be measured by the method described in Examples.
• it is 1 mPa ⁇ s or more and 30,000 mPa ⁇ s or less, preferably 10 mPa ⁇ s or more and 30,000 mPa ⁇ s or less, more preferably 100 mPa ⁇ s or more and 30,000 mPa ⁇ s or less, and further.
• the viscosity when the composition is pH 5.0 increases 1.1 to 10 times the viscosity when the composition is pH 4.1.
• the composition used in step 1 has a viscosity at pH 4.1.
• the viscosity at pH 5.0 is preferably 1.1 times or more, preferably 9 times or less, more preferably 7 times or less, still more preferably 5 times or less, and even more. It is preferably 3 times or less. More specifically, from the above viewpoint, it is preferably 1.1 to 9 times, more preferably 1.1 to 7 times, still more preferably 1.1 to 5 times, still more preferably 1.1 to 3 times. Doubles.
• the pH of the cosmetic composition used in step 1 can be adjusted to a desired range by using an ordinary acid or base.
• the pH adjusting agent include organic acids, inorganic acids, organic bases, and inorganic bases.
• a base can be preferably used from the viewpoint of maintaining the hair treatment effect to be achieved, specifically, an inorganic alkaline agent such as sodium hydroxide or potassium hydroxide; monoethanolamine or diethanolamine. , Triethanolamine, organic alkaline agents such as aminopropanol; ammonia; ammonium chloride; basic amino acids such as arginine.
• sodium hydroxide, potassium hydroxide, triethanolamine, and arginine are preferably used from the viewpoint of maintaining the hair treatment effect to be achieved.
• the pH of the cosmetic composition used in step 1 is, for example, 7.0 or less, preferably 6.5 or less, more preferably 6.0 or less. It is more preferably 5.0 or less, and even more preferably 4.8 or less. Further, from the same viewpoint, it is preferably 3.0 or more, more preferably 3.5 or more. More specifically, from the above viewpoint, it is preferably 3.0 or more and 7.0 or less, more preferably 3.0 or more and 6.5 or less, and further preferably 3.5 or more and 6.0 or less. It is even more preferably 3.5 or more and 5.0 or less, and even more preferably 3.5 or more and 4.8 or less.
• the pH can be measured by the method described in Examples.
• the cosmetic composition used in step 1 may be filled in a container dedicated to the scalp protective agent and used, or the cosmetic composition used in step 1 may be provided as a supplementary package together with the container dedicated to the scalp protective agent and used. ..
• the container for exclusive use of the scalp protective agent may be filled with the cosmetic composition used in step 1, and examples of the container include a PETG ampoule container manufactured by Pin Mao Plastic Industry Co., Ltd.
• the present invention also includes a cosmetic composition for protecting the scalp and a method for producing the same.
• the cosmetic composition include the following embodiments.
• ⁇ Embodiment 1> It may be the same as the cosmetic composition used in the step 1, that is, a composition containing the following components (A) to (C) and having a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s.
• the cosmetic composition according to the second embodiment of the present invention contains the following components (A) to (C), has a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s, and is a surfactant in the cosmetic composition.
• the composition has a content of less than 5.0% by mass.
• the cosmetic composition according to the third embodiment of the present invention is a composition containing the following components (A) to (D) and having a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s.
• the cosmetic composition according to the fourth embodiment of the present invention is a composition containing the following components (A) to (D) and having a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s.
• the cosmetic composition according to the fifth embodiment of the present invention is a composition containing the following components (A) to (D) and having a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s.
• the cosmetic composition of the present invention is not limited to the above-mentioned embodiment.
• the cosmetic composition of the present invention described above can significantly improve the scalp protective ability.
• the cosmetic composition of the present invention does not reduce the hair treatment effect to be achieved even after application to the scalp, and can be maintained satisfactorily. For example, when a hair color composition is applied, an excellent dyeing effect can be maintained. In addition, a good balance between coatability and dripping property can be maintained, and the convenience of use by the user can be improved.
• the method for producing the cosmetic composition of the present invention is not particularly limited. For example, it is produced by mixing the components (A) to (C) and other components as appropriate in a predetermined order.
• the component (C) is added to the deionized water, stirred and made uniform, and then the components (A) and (B) and other components are added as appropriate while cooling.
• a cosmetic composition can be obtained by stirring and homogenizing and cooling to room temperature.
• the present invention is a kit comprising the cosmetic composition and at least one hair treatment agent composition selected from the group consisting of a hair color composition, a hair bleach composition, a perm composition and a relaxer composition. Also includes.
• the hair color composition, hair bleach composition, perm composition and relaxer composition are not particularly limited and may be ordinary commercial products, for example, Kao Corporation's Liese Bubble Color Series, Brone Fragrance. And glossy color cream series.
• step 1 applying a cosmetic composition
• step 2 applying a hair treatment agent composition
• the cosmetic composition used in step 1 has a specific component (applying a cosmetic composition). Since it contains A) to (C) and has a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s, it can significantly improve the scalp protection ability, reduce the damage to the scalp caused by the hair treatment agent composition, and reduce the damage to the scalp. Or it can be alleviated. Further, according to an embodiment of the present invention, the hair treatment method of the present invention can not only significantly improve the scalp protection ability but also maintain the hair treatment effect to be achieved, and the cosmetic composition to be used can be used. A good balance between coatability and dripping can be maintained, and user convenience can be improved.
• the scalp is protected from damage caused by the hair color composition, the hair bleach composition, the perm composition or the relaxer composition, so that the effect of effectively protecting the scalp can be obtained.
• the composition used in the present invention has good coatability, so that the user can easily and uniformly apply the composition to the scalp. Further, since the composition has low dripping property, an appropriate amount of the composition can provide an effect of protecting the scalp.
• the hair treatment method of the present invention does not reduce the hair treatment effect to be achieved and can be maintained satisfactorily. For example, when a hair color composition is applied, it does not affect the dyeability of the hair color composition, so that the scalp can be protected and excellent dyeability can be maintained.
• the present invention discloses a hair treatment method, a cosmetic composition for protecting the scalp, and a kit thereof.
• a hair treatment method comprising the following steps 1 and 2, wherein the step 2 is performed after the step 1.
• Step 1) A step of applying a cosmetic composition containing the following components (A), (B) and (C) and having a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s to the scalp (A) pH buffering agent When, (B) Antioxidant and (C) pH-responsive thickener
• Step 2 A step of applying at least one hair treatment agent composition selected from a hair color composition, a hair bleach composition, a perm composition and a relaxer composition to hair.
• ⁇ 2> The hair treatment method according to ⁇ 1>, wherein the content of the component (A) in the cosmetic composition is more than 0.15% by mass with respect to the entire cosmetic composition.
• ⁇ 3> The hair treatment method according to ⁇ 1> or ⁇ 2>, wherein the content of the surfactant in the cosmetic composition is less than 5.0% by mass.
• ⁇ 4> The total content of the component (A) and the component (B) in the cosmetic composition is 0.2% by mass or more and 6.0% by mass or less with respect to the entire cosmetic composition, ⁇ 1> to ⁇ .
• ⁇ 5> The item according to any one of ⁇ 1> to ⁇ 4>, wherein the mass ratio ((A) / (B)) of the component (A) to the component (B) is 1.0 or more and 8.0 or less.
• ⁇ 6> The hair treatment method according to any one of ⁇ 1> to ⁇ 5>, wherein the cosmetic composition further contains a thickener (D) different from the component (C).
• the component (D) is sodium stearoxy PG hydroxyethyl cellulose sulfonate.
• ⁇ 8> Any one of ⁇ 1> to ⁇ 7>, in which the viscosity of the cosmetic composition when the pH is 5.0 increases 1.1 to 10 times the viscosity when the cosmetic composition has a pH of 4.1.
• the hair treatment method described in the section. ⁇ 9> The hair treatment method according to any one of ⁇ 1> to ⁇ 8>, wherein the pH buffering agent has a buffering ability between pH 4.5 and 5.5.
• the pH buffering agent has a buffering capacity between at least pH 4.5 and 5.5 using an acid having a pKa (25 ° C.) of 4.0 to 6.5 and a salt thereof, ⁇ 1> to ⁇ .
• the pH buffer is at least pH 4.5-5.5 using at least one acid selected from barbituric acid, succinic acid, citric acid, acetic acid, malic acid, phthalic acid and carbonic acid and salts thereof.
• the pH buffer is preferably at least one selected from the group consisting of succinic acid and its salt, apple acid and its salt and citric acid and its salt, and more preferably citric acid and its salt.
• the hair treatment method according to any one of ⁇ 1> to ⁇ 11> which comprises citric acid and sodium citrate more preferably.
• the total content of the component (A) (in the case of a conjugated acid base pair, the total content) is preferably more than 0.15% by mass and 10.0% by mass or less, more preferably 0.2% by mass or more and 9.0. Mass% or less, still more preferably 0.5% by mass or more and 8.0% by mass or less, still more preferably 1.0% by mass or more and 6.0% by mass or less, still more preferably 1.0% by mass or more and 4.0.
• the component (B) is preferably dibutylhydroxytoluene, butylhydroxyanisole, ⁇ tocopherol, thiotaurine, thioglycolic acid, propanoic acid, tert-butylhydroquinone, nicotinic acid or a derivative thereof, catechin, mematsuyoigusa extract, ⁇ -carotene, flavonoid compound. , Ascorbic acid or a salt thereof or a derivative thereof, L-cysteine or a salt or a derivative thereof, N-acetyl-L-cysteine or a salt or a derivative thereof, or a polyphenol compound.
• the total content of the component (B) is preferably 0.01% by mass or more and 5.0% by mass or less, more preferably 0.1% by mass or more and 3.0% by mass or less, and further preferably 0.2% by mass or more.
• ⁇ 1> to ⁇ 14> which are 1.5% by mass or less, more preferably 0.2% by mass or more and 1.0% by mass or less, and even more preferably 0.2% by mass or more and 0.7% by mass or less.
• the hair treatment method according to any one of the following items.
• the total content of the component (A) and the component (B) is preferably 0.2% by mass or more and 10.0% by mass or less, more preferably 1.0% by mass or more and 8.0% by mass or less, and further preferably 2.
• the hair treatment method according to any one of ⁇ 1> to ⁇ 15>, which is 5.5% by mass or more and 4.5% by mass or less, and more preferably 2.5% by mass or more and 4.0% by mass or less.
• the mass ratio of the component (A) to the component (B) (component (A) / component (B)) is preferably 1.0 or more and 8.0 or less, more preferably 1.1 or more and 7.5 or less, still more preferable.
• the hair treatment method described in. ⁇ 18> Any of ⁇ 1> to ⁇ 17>, wherein the pH-responsive thickener is an ionic water-soluble polymer whose viscosity increases with increasing pH in a part or all of the pH range of 3 to 7.
• the hair treatment method according to item 1. ⁇ 19> The pH-responsive thickener contains at least one selected from an unneutralized carboxyl group and an unneutralized sulfonic acid group, and increases the pH in a part or all of the pH range of 3 to 7.
• the hair treatment method according to any one of ⁇ 1> to ⁇ 18> which is an ionic water-soluble polymer whose viscosity increases in accordance with the above.
• the pH-responsive thickeners include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, styrene sulfonic acid, vinyl benzoic acid, 2-acrylamide-2-methyl-1-propanesulfonic acid and dimethylolpropionic acid.
• the hair treatment method according to any one of ⁇ 1> to ⁇ 19> which is a linear or branched polymer having one or more selected from the group consisting of, or a crosslinked polymer and a copolymer thereof.
• the pH-responsive thickener preferably comprises polyacrylic acid, a carboxyvinyl polymer, sodium polyacrylate, an acrylic acid / alkyl methacrylate copolymer, polymethacrylic acid, and a methacrylic acid / alkyl methacrylate copolymer.
• One or more selected from the group more preferably one or more selected from the group consisting of acrylic acid / alkyl methacrylate copolymer, methacrylic acid / alkyl methacrylate copolymer and carboxyvinyl polymer.
• the hair treatment method according to any one of ⁇ 1> to ⁇ 20>, which more preferably contains a carboxyvinyl polymer.
• the total content of the component (C) is preferably 0.1% by mass or more and 3.0% by mass or less, more preferably 0.1% by mass or more and 2.5% by mass or less, and further preferably 0.1% by mass or more.
• ⁇ 1> to ⁇ 21> which are 2.0% by mass or less, more preferably 0.2% by mass or more and 1.7% by mass or less, still more preferably 0.2% by mass or more and 1.5% by mass or less.
• the hair treatment method according to any one of the above items.
• the cosmetic composition is further selected as (D) as a thickener from the group consisting of a nonionic water-soluble polymer and an ionic water-soluble polymer that does not show an extreme change in viscosity between pH 3 and 7.
• the hair treatment method according to any one of ⁇ 1> to ⁇ 22>, which contains seeds or more.
• the component (D) is preferably xanthan gum, carrageenan, alginic acid, starch, hydroxycellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, stearoxy PG hydroxyethylcellulosesulfonic acid Na, sodium carboxymethylcellulose, methylcellulose, cationized cellulose, polyvinylpyrrolidone, It contains one or more selected from the group consisting of polyvinyl alcohol and cationized polyvinylpyrrolidone, and more preferably xanthan gum, hydroxyethyl cellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, stearoxy PG hydroxyethyl cellulose sulfonate Na, polyvinylpyrrolidone.
• the hair treatment method according to any one of ⁇ 23>. ⁇ 25>
• the total content of the component (D) is preferably 0.1% by mass or more and 5.0% by mass or less, more preferably 0.1% by mass or more and 4.0% by mass or less, and further preferably 0.2% by mass or more.
• the total content of the water-soluble solvent in the cosmetic composition is preferably 10.0% by mass or less, more preferably 5.0% by mass or less, still more preferably 4.0% by mass or less, still more preferably 3.
• Any of ⁇ 1> to ⁇ 26>, wherein the content of water in the cosmetic composition is preferably 50% by mass or more and 99.8% by mass or less, more preferably 60% by mass or more and 98% by mass or less.
• the total content of the surfactant in the cosmetic composition is preferably less than 5.0% by mass, more preferably less than 4.0% by mass, still more preferably less than 3.0% by mass, still more preferably 2.
• the viscosity of the cosmetic composition at pH 4.1 is preferably 10 mPa ⁇ s or more and 30,000 mPa ⁇ s or less, more preferably 100 mPa ⁇ s or more and 30,000 mPa ⁇ s or less, and further preferably 300 mPa ⁇ s or more and 25,000 mPa ⁇ s or less.
• the viscosity of the cosmetic composition when the pH is 5.0 is preferably 1.1 to 9 times, more preferably 1.1 to 7 times, and further, the viscosity when the cosmetic composition is pH 4.1.
• the cosmetic composition further contains a pH adjuster, which is preferably from sodium hydroxide, potassium hydroxide, monoethanolamine, diethanolamine, triethanolamine, aminopropanol, ammonia, ammonium chloride and arginine.
• any of ⁇ 1> to ⁇ 30> which is one or more selected from the group consisting of, more preferably one or more selected from the group consisting of sodium hydroxide, potassium hydroxide, triethanolamine and arginine.
• the hair treatment method according to item 1. ⁇ 32> The pH of the cosmetic composition is preferably 3.0 or more and 7.0 or less, more preferably 3.0 or more and 6.5 or less, still more preferably 3.5 or more and 6.0 or less, still more preferably.
• the hair treatment method according to any one of ⁇ 1> to ⁇ 31> which is 3.5 or more and 5.0 or less, more preferably 3.5 or more and 4.8 or less.
• the amount of the cosmetic composition applied to the scalp is preferably in the range of 8 to 40 ⁇ l / cm 2 , more preferably in the range of 13 to 27 ⁇ l / cm 2 , and further preferably in the range of 20 to 27 ⁇ l / cm 2 .
• the hair treatment method according to any one of ⁇ 1> to ⁇ 32>.
• ⁇ 34> A cosmetic composition containing the following components (A), (B) and (C) and for protecting the scalp having a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s.
• ⁇ 36> Contains the following components (A), (B) and (C),
• the component (A) has a buffering capacity at least between pH 4.5 and 5.5 using an acid having a pKa (25 ° C.) of 4.0 to 6.5 and a salt thereof.
• the component (B) is at least one selected from the group consisting of ascorbic acid or a salt thereof, ascorbic acid glucoside, ascorbic acid phosphate magnesium, erythorbic acid, and sodium erythorbate.
• the component (C) contains at least one selected from an unneutralized carboxyl group and an unneutralized sulfonic acid group, and in a part or all of the pH range of 3 to 7, depending on the increase in pH. It is an ionic water-soluble polymer whose viscosity increases.
• the pH of the cosmetic composition is 3.5 or more and 4.8 or less.
• a cosmetic composition for protecting the scalp which has a viscosity at pH 4.1 of 100 to 30,000 mPa ⁇ s.
• the component (A) has a buffering capacity at least between pH 4.5 and 5.5 using an acid having a pKa (25 ° C.) of 4.0 to 6.5 and a salt thereof.
• the component (B) is at least one selected from the group consisting of ascorbic acid or a salt thereof, ascorbic acid glucoside, ascorbic acid phosphate magnesium, erythorbic acid, and sodium erythorbate.
• the component (C) contains at least one selected from an unneutralized carboxyl group and an unneutralized sulfonic acid group, and in a part or all of the pH range of 3 to 7, depending on the increase in pH.
• the pH of the cosmetic composition is 3.5 or more and 4.8 or less.
• the content of the surfactant is less than 1.0% by mass
• a cosmetic composition for protecting the scalp which has a viscosity at pH 4.1 of 100 to 30,000 mPa ⁇ s.
• the content of the component (A) in the cosmetic composition is more than 0.15% by mass and the content of the surfactant is less than 5.0% by mass with respect to the entire cosmetic composition.
• the content of the component (A) in the cosmetic composition is more than 0.15% by mass with respect to the entire cosmetic composition, and the component (A) and the component (B) in the cosmetic composition.
• the total content of the cosmetic composition is 2.3% by mass or more and 6.0% by mass or less, and the content of the surfactant is less than 5.0% by mass, ⁇ 34> to ⁇ 36.
• the cosmetic composition according to any one of the following items. ⁇ 40> (I) A cosmetic composition containing the following components (A), (B) and (C) and having a viscosity at pH 4.1 of 1 to 30,000 mPa ⁇ s.
• PH measurement The pH of the undiluted solution was measured at 25 ° C. using a pH meter (pH METER F-52, manufactured by HORIBA, Ltd.).
• the viscosity is a value measured at 25 ° C. using a B-type viscometer (VISCOMETER TVB-10; manufactured by Toki Sangyo Co., Ltd.) and rotated for 10 seconds.
• a 1.5 cm square tape (acrylic tape; manufactured by Teraoka Seisakusho Co., Ltd.) was attached to the place where the sample was processed, tape stripping was performed three times, and a stratum corneum was collected on the adhesive surface of the tape.
• Each tape was cut into 4 pieces, placed in a vial, 450 ⁇ l of a mixed aqueous solution of 0.1 N NaOH and 1% sodium dodecyl sulfate was added, and the protein was extracted in an incubator at 60 ° C. for 2 and a half hours. After cooling with water, 50 ⁇ l of 2N HCl was added to prepare a stratum corneum protein extraction sample.
• the scalp protective ability is calculated from the following formula (1), and the larger the value, the higher the scalp protective ability.
• the color tone of the obtained hair bundle immediately after dyeing was measured by a CIE color system (L * , a * , b * ) using a color difference meter (manufactured by Konica Minolta Sensing Co., Ltd .; color difference meter CR-400).
• the difference from the color tone of the hair bundle dyed without the sample treatment was calculated by the following formula (2) and used as the dyeability ⁇ E * .
• L * 0 , a * 0 and b * 0 indicate the values of L * , a * and b * of the hair bundle dyed without sample treatment, respectively, and L * 1 , a * 1 and b * 1 respectively.
• the values of L * , a * and b * immediately after dyeing the hair bundle dyed after the sample treatment are shown. The smaller ⁇ E * , the less the sample has an effect on hair dyeability.
• Examples 1 to 43 Comparative Examples 1 to 4
• the cosmetic compositions of each example were prepared based on the compositions shown in Tables 4 to 9 and evaluated according to the above method.
• the numerical values relating to the components (A), (B), (C) and (D) shown in Tables 4 to 9 represent the active amount of each component in each composition in mass%. It was done.
• the hair treatment method of the present invention can be suitably used in the field of cosmetics and the like. It is also suitable for animals such as dogs and cats as well as humans.

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• 2021
  • 2021-07-27 WO PCT/JP2021/027670 patent/WO2022025032A1/ja not_active Ceased
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