Hair treatment composition, hair treatment method, cystine increase agent, and method for increasing cystine of hair

Abstract

To provide a hair treatment composition suppressing generation of cysteic acid, increasing cystine for improving elasticity of hair, and a hair treatment method.SOLUTION: There is provided a hair treatment composition including at least one kind out of Adiantum capillus-veneris L leaf extract and Prunus persica leaf extract, and having alkaline property, for solving above mentioned problems. By application of the hair treatment composition to hair, to hair which is damaged due to permanent wave treatment or coloring treatment and the like, limber elasticity can be applied, for reproducing health hair. The hair treatment composition of the invention can be used for treatment after permanent wave treatment and coloring treatment, and for system treatment.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a hair treatment composition for treating hair. More specifically, the present invention relates to a hair treatment composition for increasing cystine in hair and imparting supple elasticity to hair. [Background technology]

[0002] Hair is damaged both internally and externally every day due to friction from brushing, heat from drying with a hair dryer, exposure to ultraviolet rays when going outside, etc. In addition, hair can be damaged by alkaline agents during coloring and perm treatments.

[0003] Normal hair contains a lot of cystine, and the disulfide bonds of cystine contribute to the strength of hair. In perm treatment, a reducing agent is applied to the hair in the first agent to cleave the disulfide bonds of cystine contained in the hair, resulting in cysteine ​​having a thiol group. Next, with the curlers set, an oxidizing agent such as hydrogen peroxide contained in the second agent is applied to generate disulfide bonds from the thiol groups of cysteine ​​to regenerate cystine. In hair treatment with an oxidizing agent such as hydrogen peroxide, some of the thiol groups are oxidized without regenerating disulfide bonds, causing irreversible changes to sulfo groups, and cysteic acid is generated. This generation of cysteic acid reduces the strength of the hair and causes damage. Therefore, there is a demand for the development of a hair treatment composition that reduces damage to hair and obtains hair with supple elasticity.

[0004] For example, Patent Document 1 discloses a hair treatment composition for protecting hair, preventing damage, or repairing damaged hair, which is characterized by containing soluble keratin into which a carboxyl group has been introduced. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2010-132595 A Summary of the Invention [Problem to be solved by the invention]

[0006] When cystine in hair decreases and cysteine ​​and cysteic acid increase, hair strength decreases. In particular, cysteic acid cannot be reversibly converted to cystine or cysteine, so once cysteic acid is produced, hair strength cannot be restored. Therefore, an object of the present invention is to provide a hair treatment composition and a hair treatment method for improving hair elasticity by increasing cystine while suppressing the production of cysteic acid. [Means for solving the problem]

[0007] As a result of intensive research into the above-mentioned problems, the inventors have discovered that by applying a plant extract or polyphenol to hair, it is possible to increase cystine in hair while suppressing the production of cysteic acid, and have completed the present invention. That is, the present invention provides the following cystine-increasing agent, method for increasing cystine in hair, hair treatment composition, and hair treatment method.

[0008] The hair treatment composition of the present invention is a hair treatment composition for treating hair, and is characterized by containing at least one type of plant extract or polyphenol and increasing cystine in hair. This hair treatment composition can impart supple elasticity to hair.

[0009] The hair treatment composition of the present invention is a hair treatment composition for treating hair, which contains at least one of capillary fern leaf extract, peach leaf extract, sugar maple sap, soapberry extract, mandarin orange peel extract or witch hazel leaf extract, and is characterized by having a pH of 7.0 or higher when in use. This hair treatment composition can form cystine while suppressing the production of cysteic acid, and by applying this hair treatment composition to hair, it is possible to impart flexible elasticity to the hair.

[0010] Furthermore, according to one embodiment of the hair treatment composition of the present invention, the hair treatment composition is characterized by comprising a plant extract-containing composition containing at least one of oleander leaf extract, peach leaf extract, sugar maple sap, Sapindus mukorossi extract, mandarin orange peel extract, or Hamamelis virginiana leaf extract, and an alkali-containing composition containing an alkaline agent. According to the above-mentioned features, the plant extract and the alkaline agent are distributed as separate compositions, so that the storage stability of the plant extract is excellent and the effects of the present invention can be fully exhibited even after long-term storage.

[0011] The method for increasing cystine in hair of the present invention is characterized by comprising an application step of applying at least one type of plant extract or polyphenol to hair. According to this method, it is possible to form cystine while suppressing the production of cysteic acid. Also, according to this method, it is possible to impart flexible elasticity to hair.

[0012] The hair treatment method of the present invention is characterized in that it comprises a pH adjustment step of adjusting at least one of capillary fern leaf extract or peach leaf extract to a pH of 7.0 or higher, and an application step of applying at least one of capillary fern leaf extract or peach leaf extract to hair. According to this hair treatment method, it is possible to form cystine while suppressing the production of cysteic acid. Also, according to this hair treatment method, it is possible to impart flexible elasticity to hair.

[0013] Furthermore, according to one embodiment of the hair treatment method of the present invention, the method comprises the steps of preparing a plant extract-containing composition containing at least one of capillary fern leaf extract, peach leaf extract, sugar maple sap, soapberry extract, mandarin orange peel extract, or witch hazel leaf extract, preparing an alkali-containing composition containing an alkaline agent, and mixing the plant extract-containing composition and the alkali-containing composition at the time of use. According to this feature, the plant extract and the alkaline agent are distributed as separate compositions, so that the storage stability of the plant extract is excellent and the effects of the present invention can be fully exhibited even after long-term storage.

[0014] The cystine-increasing agent of the present invention is characterized by containing at least one type of plant extract or polyphenol and increasing the amount of cystine. This cystine-increasing agent can increase cystine while suppressing the production of cysteic acid.

[0015] Furthermore, one embodiment of the cystine-increasing agent of the present invention is characterized in that it increases cystine in hair. This cystine-increasing agent can form cystine while suppressing the production of cysteic acid. Furthermore, by applying this cystine-increasing agent to hair, it is possible to impart supple elasticity to the hair.

[0016] According to one embodiment of the cystine-increasing agent of the present invention, the plant extract is capillus-veneris leaf extract, peach leaf extract, sugar maple sap, soapberry extract, mandarin orange peel extract, or witch hazel leaf extract. According to this feature, the effect of the present invention can be further enhanced. Effect of the Invention

[0017] The present invention provides a hair treatment composition and a hair treatment method for improving hair elasticity by increasing cystine while suppressing the production of cysteic acid. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The hair treatment composition, hair treatment method, cystine-increasing agent, and method for increasing cystine of the present invention are described below. In this specification, "cystine", "cysteine", and "cysteic acid" refer to amino acid residues constituting proteins, and an increase or decrease in "cystine", "cysteine", and "cysteic acid" refers to an increase or decrease in the amino acid composition of a protein.

[0019] [Hair treatment composition] The hair treatment composition of the present invention is characterized by containing at least one of polyphenols or plant extracts. The hair treatment composition of the present invention can increase cystine while suppressing the production of cysteic acid. The hair treatment composition of the present invention can also impart supple elasticity to hair and restore healthy hair.

[0020] The hair in the present invention refers to keratin fibers, and includes, for example, human hair, beard, eyebrows, leg hair, and other body hair, as well as the body hair of animals such as pets, etc. In particular, it can be suitably used for hair that has been damaged by friction such as brushing, heat when drying with a hair dryer, exposure to ultraviolet rays when going out, and hair that has been damaged by coloring or perming.

[0021] The hair treatment composition of the present invention can be used as a coloring agent, a perm agent, a shampoo, a treatment, a hair styling agent, etc. From the viewpoint of imparting supple elasticity to hair, it is preferably used as a treatment, and particularly preferably used as a treatment to be applied after coloring or perming.

[0022] (Polyphenols) Polyphenols are substances having multiple phenolic hydroxyl groups in the molecule. Examples include flavonoids such as catechin, anthocyanin, proanthocyanidin, tannin, rutin, and isoflavone, phenolic acids such as chlorogenic acid and ferulic acid, lignans such as sesamin, ellagic acid, curcumin, and coumarin. The hair treatment composition of the present invention can contain one or more of these polyphenols.

[0023] The content of polyphenol in the hair treatment composition of the present invention is not particularly limited, but is, for example, 0.00001 to 10% by mass. The lower limit of the polyphenol content is preferably 0.0005% by mass or more, more preferably 0.001% by mass or more. The upper limit of the polyphenol content is preferably 1% by mass or less, more preferably 0.5% by mass or less.

[0024] By containing polyphenols, it is possible to increase cystine while suppressing the production of cysteic acid. In addition, by increasing cystine, it is possible to give supple elasticity and regenerate healthy hair. In other words, the composition containing polyphenols can be used as a cystine increaser for increasing cystine in hair.

[0025] Although the function of the present invention is not clear, it is known that polyphenols are oxidized to quinones, and it is presumed that this quinone oxidizes thiol groups to form disulfide bonds, thereby increasing cystine. In addition, since the oxidizing power of this quinone is weak, it is presumed that the production of cysteic acid can be suppressed by suppressing the oxidation of thiol groups to sulfo groups.

[0026] (Plant extract) The plant extract is a plant extract containing polyphenols. The plant extract may be obtained in any manner as long as it is an extract component obtained from a plant. For example, it may be obtained as a juice obtained by squeezing juice from a plant, or as an extract obtained by extracting with an organic solvent such as water or ethanol. In addition, any part of the plant may be used as the plant raw material for obtaining the plant extract, and examples thereof include leaves, stems, roots, flowers, bark, peel, fruit, seeds, and sap.

[0027] In addition, commercially available plant extract raw materials may be used. Commercially available plant extract raw materials include, for example, capillus capillus leaf extract, peach leaf extract, mandarin orange peel extract, sugar maple sap, hamamelis leaf extract, soapberry extract, and coffee tree robusta seed extract. From the viewpoint of further exerting the effects of the present invention, capillus capillus leaf extract and peach leaf extract are preferred. The total content of polyphenols contained in the pure extract of the fern Capricornis-veneris leaf (as a crude extract extracted with methanol) is 10 to 25% by mass in terms of gallic acid equivalent.

[0028] The content of polyphenols in the plant extract can be measured in accordance with "Screening for Bioactive Compounds from Adiantum capillus-veneris L." (Journal of The Chemical Society of Pakistan, Vol. 34, No. 1, 2012).

[0029] The content of the plant extract in the hair treatment composition of the present invention is not particularly limited, but is preferably 0.0001 to 100% by mass. From the viewpoint of enhancing the effect of increasing cystine, the lower limit of the content of the plant extract is preferably 0.0005% by mass or more, more preferably 0.001% by mass or more, even more preferably 0.005% by mass or more, and particularly preferably 0.01% by mass or more. The upper limit of the content of the plant extract is preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 3% by mass or less, and particularly preferably 1% by mass or less. The content of the plant extract is calculated as the pure content of the plant extract.

[0030] By containing the plant extract, it is possible to increase cystine while suppressing the production of cysteic acid. In addition, by increasing cystine, it is possible to give supple elasticity and regenerate healthy hair. In other words, the composition containing the plant extract can be used as a cystine increaser for increasing cystine in hair.

[0031] (Alkaline agent) The hair treatment composition preferably contains an alkaline agent to adjust the pH to an alkaline condition. Since the conversion of polyphenols to quinones is promoted under alkaline conditions, the effect of the present invention can be further enhanced by adjusting the pH to an alkaline condition.

[0032] Examples of the alkaline agent include ammonia, alkanolamine, ammonium salt, silicate, carbonate, hydrogencarbonate, metasilicate, phosphate, basic amino acid, hydroxide, and salts thereof. Examples of the alkanolamine include aminomethylpropanol, ethanolamine, and the like. Examples of the carbonate include sodium carbonate, potassium carbonate, and the like. Examples of the hydroxide include sodium hydroxide, potassium hydroxide, and the like. The alkaline agent is not particularly limited, but is preferably sodium hydroxide, sodium carbonate, or aminomethylpropanol.

[0033] The content of the alkaline agent in the hair treatment composition of the present invention is not particularly limited, but is preferably 0.001 to 5% by mass. The lower limit of the content of the alkaline agent is preferably 0.01% by mass or more, more preferably 0.1% by mass or more. The upper limit of the content of the alkaline agent is preferably 3% by mass or less, more preferably 1% by mass or less.

[0034] (pH adjuster) The hair treatment composition preferably contains a pH adjuster to adjust the pH to a desired pH. The pH adjuster adjusts the pH together with the alkaline agent, and examples of the pH adjuster include inorganic acids and organic acids. Examples of inorganic acids include hydrochloric acid, sulfuric acid, nitric acid, and phosphoric acid. Examples of organic acids include citric acid and acetic acid. Phosphoric acid is preferred from the viewpoint of having a buffering capacity under alkaline conditions.

[0035] The content of the pH adjuster in the hair treatment composition of the present invention is not particularly limited, but is preferably 0.001 to 5% by mass. The lower limit of the content of the pH adjuster is preferably 0.01% by mass or more, more preferably 0.1% by mass or more. The upper limit of the content of the pH adjuster is preferably 3% by mass or less, more preferably 1% by mass or less, and even more preferably 0.5% by mass or less.

[0036] The pH of the hair treatment composition of the present invention during use is preferably 7.0 or more. The lower limit of the pH is preferably 7.5 or more, more preferably 8.0 or more, even more preferably 8.5 or more, and particularly preferably 9.0 or more. The upper limit of the pH is preferably 11.5 or less, more preferably 11.0 or less, and even more preferably 10.5 or less. By setting the pH to 7.0 or more, the conversion of polyphenols to quinones is promoted, so that the effects of the present invention can be further exerted. By setting the pH to 11.5 or less, the alkali denaturation of hair proteins is suppressed, so that hair with supple elasticity and good feel can be obtained.

[0037] (Other Ingredients) The hair treatment composition of the present invention may contain other components in addition to the above-mentioned components depending on its intended use, such as surfactants, oily components, polyhydric alcohols, polymeric compounds, peptides, amino acids, sugars, vitamins, fragrances, ultraviolet absorbers, chelating agents, direct dyes, oxidizing agents, antioxidants, preservatives, stabilizers, inorganic salts, organic solvents, and water.

[0038] (Dosage form) The hair treatment composition of the present invention preferably comprises at least one of a plant extract-containing composition containing a plant extract or a polyphenol-containing composition containing a polyphenol, and an alkali-containing composition containing an alkaline agent. By distributing the plant extract, the polyphenol, and the alkaline agent as separate compositions, the storage stability of the plant extract and the polyphenol is excellent, and the effects of the present invention can be fully exhibited even after long-term storage.

[0039] The formulation of the hair treatment composition is not particularly limited, and examples thereof include liquid, emulsion (OW emulsion, WO emulsion, multiple emulsion), cream, powder, granules, gel, and foam. From the viewpoint of excellent applicability, the composition is preferably cream or foam. The foam formulation can be made into a foam using a known foaming tool. Examples of known foaming tools include a non-aerosol type former, an aerosol type former, and a shaker.

[0040] In addition, the plant extract-containing composition or polyphenol-containing composition and the alkali-containing composition may be in the same or different formulations as long as they are in a mixable formulation. The plant extract-containing composition or polyphenol-containing composition and the alkali-containing composition may be mixed before application to hair, or each composition may be applied to hair and mixed on the hair. The mixing ratio (mass ratio) is not particularly limited, but for example, when the alkali agent-containing composition is 1, the plant extract-containing composition or polyphenol-containing composition is 0.5 to 50 times the amount.

[0041] [Hair treatment method] The hair treatment method of the present invention is characterized in that it comprises a pH adjustment step of adjusting at least one of a plant extract or a polyphenol to pH 7.0 or higher, and an application step of applying at least one of a plant extract or a polyphenol to hair. Note that the order of the application step and the pH adjustment step is not particularly limited, and either step may be performed first. According to this hair treatment method, it is possible to increase cystine while suppressing the production of cysteic acid. Also, according to this hair treatment method, it is possible to impart supple elasticity to hair.

[0042] The application step is a step of applying the plant extract or polyphenol to the hair. The operation of applying the plant extract or polyphenol to the hair is not particularly limited, and examples thereof include applying the composition to the hair using a brush, applying the composition to the hair using a gloved hand, applying the composition to the hair using a comb, and applying the composition to the hair as a mist.

[0043] The pH adjustment step is a step in which at least one of the plant extracts or polyphenols is adjusted to pH 7.0 or higher. The lower limit of the pH in the pH adjustment step is preferably 7.5 or higher, more preferably 8.0 or higher, even more preferably 8.5 or higher, and particularly preferably 9.0 or higher. By maintaining the pH at 7.0 or higher, the conversion of polyphenols to quinones is promoted, so that the effects of the present invention can be further exerted. The upper limit of the pH in the pH adjustment step is preferably 11.5 or lower, more preferably 11.0 or lower, and even more preferably 10.5 or lower. By setting the pH at 11.5 or lower, the alkali denaturation of hair proteins is suppressed, so that hair with supple elasticity and good feel can be obtained.

[0044] The hair treatment method of the present invention preferably includes a retaining step of retaining on the hair at least one of the plant extract or polyphenol whose pH has been adjusted by the pH adjusting step. The time of the retaining step is not particularly limited, but is, for example, 1 minute to 60 minutes. The lower limit of the time of the retaining step is preferably 3 minutes or more. The upper limit of the time of the retaining step is preferably 30 minutes or less, more preferably 20 minutes or less, and even more preferably 10 minutes or less. The start time of the retaining step is the end time of the pH adjusting step and the application step, and the end time of the retaining step is the start time of the hair washing step for washing out the plant extract or polyphenol from the hair. The hair washing step will be described later.

[0045] The hair temperature in the holding step is not particularly limited, but may be, for example, 0°C to 100°C. The lower limit of the hair temperature is preferably 10°C or higher, more preferably 20°C or higher, even more preferably 30°C or higher, and particularly preferably 35°C or higher. By increasing the hair temperature, the effect of the present invention can be further enhanced. The upper limit of the hair temperature in the holding step is preferably 80°C or lower, more preferably 60°C or lower, even more preferably 50°C or lower, and particularly preferably 45°C or lower. By setting the upper limit of the temperature to 80°C or lower, thermal denaturation of the hair protein is suppressed, so that hair with a supple elasticity and a good feel can be obtained. The hair temperature can be measured by an infrared thermometer.

[0046] The hair treatment method of the present invention preferably includes a hair washing step for washing away the plant extract or polyphenol from the hair. The operation for washing away the plant extract or polyphenol from the hair is not particularly limited, but examples thereof include an operation of rinsing the hair with water or hot water, and an operation of washing away the plant extract or polyphenol with a hair washing composition such as shampoo.

[0047] In addition, the hair treatment method of the present invention preferably comprises the steps of preparing at least one of a plant extract-containing composition or a polyphenol-containing composition, preparing an alkali-containing composition containing an alkaline agent, and mixing the at least one of the plant extract-containing composition or the polyphenol-containing composition with the alkali-containing composition at the time of use. As a result, the plant extract or polyphenol and the alkaline agent are distributed as separate compositions, so that the storage stability of the plant extract or polyphenol is excellent and the effects of the present invention can be fully exerted even after long-term storage.

[0048] The step of mixing at least one of the plant extract-containing composition or the polyphenol-containing composition with the alkali-containing composition at the time of use may be any operation, for example, a mixing operation before application to hair, or a operation of applying the plant extract-containing composition or the polyphenol-containing composition and the alkali-containing composition to hair and mixing them on the hair. From the viewpoint of uniformly mixing the plant extract-containing composition or the polyphenol-containing composition with the alkali-containing composition, a mixing operation before application to hair is preferred.

[0049] [Cystine increaser] The cystine-increasing agent of the present invention is characterized by containing at least one of a plant extract or a polyphenol and increasing cystine. The cystine-increasing agent is used for the purpose of increasing cystine, and can be used, for example, by adding it to a hair treatment composition, by adding it to a food composition to change the physical properties of the protein and adjust the texture, by applying it to animal-derived fiber compositions such as wool and clothing manufactured using the same to repair damage, or by using it in biochemical tests. The cystine-increasing agent of the present invention is preferably used by adding it to a hair treatment composition.

[0050] The form of the cystine-increasing agent is not particularly limited, and examples thereof include powder, granules, tablets, liquid, etc. From the viewpoint of ease of addition to the hair treatment composition, powder, granules, liquid, etc. are preferred.

[0051] [How to increase cystine] The method for increasing cystine of the present invention is characterized by comprising a step of applying at least one of a plant extract and a polyphenol to a protein or peptide containing cysteine, or to cysteine. According to this method for increasing cystine, a disulfide bond can be generated from a thiol group of a protein, a peptide, or cysteine.

[0052] The step of applying at least one of the plant extracts or polyphenols is an operation of contacting at least one of the plant extracts or polyphenols with a protein, peptide, or cysteine, for example, an operation of applying at least one of the plant extracts or polyphenols to a solid protein, peptide, or cysteine, or an operation of adding at least one of the plant extracts or polyphenols to a solution of a protein, peptide, or cysteine.

[0053] The proteins and peptides are not particularly limited as long as they have a thiol group. Examples include hair, food, fiber, etc. Cystine may also be an amino acid.

[0054] The method for increasing cystine of the present invention is preferably used for hair keratin as a protein. That is, the method for increasing cystine in hair of the present invention is characterized by comprising an application step of applying at least one of a plant extract or a polyphenol to hair.

[0055] In order to obtain a preferred embodiment of the method for increasing cystine, each step in the hair treatment method described above can be applied mutatis mutandis. EXAMPLES

[0056] The present invention will be described in detail below with reference to examples, but the technical scope of the present invention is not limited to these examples.

[0057] [Composition of hair treatment composition] Hair treatment compositions were prepared containing the components shown in Tables 1 to 4. The numerical value in the column showing each component in each table indicates the content of the component in that column, and the unit is % by mass. In the hair treatment compositions of Examples 1 to 20 and Comparative Examples 1 and 2, a plant extract-containing composition containing a plant extract and an alkali-containing composition containing an alkaline agent were mixed at the time of use. The hair treatment composition of Example 21 was prepared by mixing all the components, and the composition was used after one day had passed after preparation. In the hair treatment compositions of Examples 1 to 20 and Comparative Examples 1 and 2, the plant extract-containing composition is a composition containing a plant extract or an oxidizing agent, propylene glycol, ethanol, lauryl betaine, phosphoric acid, and purified water, and the alkali-containing composition is a composition containing an alkaline agent and purified water. The mixing ratio (as a mass ratio) of the plant extract-containing composition and the alkali-containing composition is 1:1.

[0058] The following plant extracts were used. Note that the plant extract content in each table indicates the pure extract content. Fern Capricornis-veneris Leaf Extract: (Product name) "Hanslaj Extract", manufactured by Koei Kogyo Co., Ltd., extract pure content 0.5% by mass, total polyphenols 0.088% by mass (as gallic acid equivalent) Peach leaf extract: (product name) "Peach Extract", manufactured by Maruzen Pharmaceutical Co., Ltd., extract purity 1.4% by mass Mandarin orange peel extract: (product name) "Mandarin Clear", manufactured by Ichimaru Pharcos Co., Ltd., extract pure content 3% by mass Sugar maple sap: (product name) "Maple Water", manufactured by Ichimaru Falcos Co., Ltd., extract purity 99.2% by mass Hamamelis leaf extract: (product name) "Hamamelis Extract", manufactured by Maruzen Pharmaceutical Co., Ltd., extract purity 1.5% by mass Sapindus mukorossi extract: (Product name) "Sapindus mukorossi extract powder", manufactured by Maruzen Pharmaceutical Co., Ltd., extract purity 100% by mass

[0059] [Evaluation of hair treatment compositions] A commercially available perm solution 1 was applied to a 30 cm long black hair bundle manufactured by Beaulax Co., Ltd., and the hair was treated for 15 minutes at a temperature of 30°C. Next, the perm solution 1 was washed away by rinsing with water to obtain hair for evaluation. The hair treatment composition shown in Tables 1 to 4 was applied to the hair for evaluation, and the hair was left for 5 minutes under the temperature and pH environment shown in the tables, and then washed with water. The pH shown in the tables is the value obtained by measuring the pH of the hair treatment composition using a pH meter "F-22" (manufactured by HORIBA Corporation). The pH was measured by subjecting the hair treatment composition to the pH meter as it is, without diluting it. The hair treated with the hair treatment composition was evaluated for the effect of increasing cystine, the effect of decreasing cysteine, the effect of inhibiting the production of cysteic acid, and the condition of the hair (supple elasticity).

[0060] <Methods for evaluating the effect of increasing cystine, decreasing cysteine, and inhibiting the production of cysteic acid> The effect of increasing cystine, the effect of decreasing cysteine, and the effect of inhibiting the production of cysteic acid were evaluated based on the change in the content of cystine (disulfide bond), the content of cysteine ​​(thiol group), and the content of cysteic acid (sulfo group) in the hair before and after treatment with the hair treatment composition. The methods for measuring the contents of cystine, cysteine, and cysteic acid in hair are as follows.

[0061] (Method for measuring the content of cystine, cysteine, and cysteic acid in hair) To prevent cysteine ​​from being converted to cystine during the analysis, the hair is treated with N-ethylmaleimide to modify the thiol group with maleimide. The hair is then freeze-pulverized and heated in 6N hydrochloric acid at 110°C for 24 hours to hydrolyze the hair to amino acids. The amount of cystine in the resulting amino acid solution is quantified using capillary electrophoresis (instrument name: 7100 Capillary Electrophoresis (Agilent Technologies)), and the amount of cysteine ​​is quantified using liquid chromatography (instrument name: 2695 Separations Module (Waters), detector: 2996 Photodiode Array Detector (Waters)). Cysteic acid is measured using infrared spectroscopy (instrument name: Spectrum Two (PerkinElmer)) on the freeze-pulverized hair powder.

[0062] (Change in cystine content in hair) The change in the cystine content in hair was calculated by the following formula (1): In the formula, "cystine after treatment" means the cystine content in hair after treatment with the hair treatment composition, and "cystine before treatment" means the cystine content in hair before treatment with the hair treatment composition.

number

[0063] (Change in cysteine ​​content in hair) The change in the cysteine ​​content in hair was calculated by the following (Equation 2), where "cysteine ​​after treatment" means the cysteine ​​content in hair after treatment with the hair treatment composition, and "cysteine ​​before treatment" means the cysteine ​​content in hair before treatment with the hair treatment composition.

number

[0064] (The ratio of the content of cysteic acid to the total content of cystine, cysteine, and cysteic acid in hair after treatment with the hair treatment composition) The ratio of the cysteic acid content to the total content of cystine, cysteine, and cysteic acid in hair was calculated by the following (Formula 3): In the formula, "post-treatment cystine" means the content of cystine in hair after treatment with the hair treatment composition, "post-treatment cysteine" means the content of cysteine ​​in hair after treatment with the hair treatment composition, and "post-treatment cysteic acid" means the content of cysteic acid in hair after treatment with the hair treatment composition.

number

[0065] The effect of increasing cystine, the effect of decreasing cysteine, and the effect of inhibiting the production of cysteic acid were evaluated according to the following evaluation criteria.

[0066] (Criteria for evaluation of the effect of increasing cystine) ◎: The change in cystine content is 10% or more. ◯: The change in cystine content is 5% or more and less than 10%. △: The change in cystine content is 0% or more and less than 5%. ×: The change in cystine content is less than 0%.

[0067] (Criteria for evaluation of cysteine ​​reduction effect) ◎: The change in cysteine ​​content is -10% or less. ○: The change in cysteine ​​content is between -10% and -5% or less. △: The change in cysteine ​​content is from more than -5% to 0% or less. ×: The change in cysteine ​​content is more than 0%.

[0068] (Criteria for evaluation of the effect of inhibiting the production of cysteic acid) ◯: After treatment with the hair treatment composition, the percentage of cysteic acid in the hair relative to the total content of cystine, cysteine, and cysteic acid was less than 5%. ×: After treatment with the hair treatment composition, the proportion of cysteic acid to the total content of cystine, cysteine, and cysteic acid in the hair was 5% or more.

[0069] <How to evaluate hair condition (supple elasticity)> The condition of the hair (supple elasticity) was evaluated by a sensory test by five expert panelists, who evaluated the change in the condition of the hair before and after treatment with the hair treatment composition. The five expert panelists evaluated the feel of the hair according to the following evaluation criteria, and the average of the scores of the five panelists was recorded as the evaluation score.

[0070] (Evaluation criteria for hair condition (supple elasticity)) 5: After treatment with the hair treatment composition, suppleness and elasticity were significantly improved. 4: After treatment with the hair treatment composition, supple elasticity was significantly improved. 3: After treatment with the hair treatment composition, the flexibility and elasticity was slightly improved. 2: No change in elasticity was felt before and after treatment with the hair treatment composition. 1: After treatment with the hair treatment composition, the suppleness and elasticity decreased.

[0071] [Table 1]

[0072] As shown in Table 1, when Examples 1 to 3 are compared with Comparative Example 1, it was found that treating hair with a hair treatment composition containing Capillus-veneris leaf extract was effective in increasing cystine and decreasing cysteine. In addition, since the production of cysteic acid was inhibited in Examples 1 to 3, it was found that the decrease in cysteine ​​was due to its conversion to cystine. Furthermore, in Examples 1 to 3, excellent effects were observed in the sensory evaluation, and it was found that the effect of increasing cystine supports the improvement of hair condition. In Comparative Example 2, an increase in cystine and a decrease in cysteine ​​due to the oxidizing agent were observed, but since cysteic acid was also produced, it was found that the decreased cysteine ​​was converted into cystine and cysteic acid.

[0073] [Table 2]

[0074] In Examples 4 to 11, hair treatment compositions containing various plant extracts, polyphenols, and various alkaline agents were evaluated, and the results showed that all of them had the effect of increasing cystine, decreasing cysteine, and inhibiting the production of cysteic acid, and also improved the condition of the hair, making it more flexible and elastic. Moreover, looking at Examples 1 and 4 to 9, it was found that the ferns capillary-fern leaf extract and peach leaf extract had particularly excellent effects.

[0075] [Table 3]

[0076] In Examples 12 to 16, pH was examined as a hair treatment condition with the hair treatment composition. As a result, particularly excellent effects were observed when hair was treated in an environment with a pH of 7.5 to 11.

[0077] [Table 4]

[0078] In Examples 17 to 21, the treatment temperature was examined as a hair treatment condition with the hair treatment composition. As a result, particularly excellent effects were observed by treating the hair in an environment where the treatment temperature was 30 to 80°C. In Example 22, the effect of the coexistence of a plant extract and an alkaline agent on the effects of the present invention was examined. As a result, it was found that the plant extract and the alkaline agent were particularly effective when mixed at the time of use. [Industrial Applicability]

[0079] According to the present invention, a cystine-increasing agent for increasing cystine in hair and a method for increasing cystine can be provided. Furthermore, according to the present invention, it is possible to provide a hair treatment composition and a hair treatment method for imparting supple elasticity to hair. The hair treatment composition and hair treatment method of the present invention can be used to impart elasticity to human body hair, beard, eyebrows, leg hair, etc. In addition, they may be used to impart elasticity to the body hair of animals such as pets.

[0080] The hair treatment composition and hair treatment method of the present invention can be applied to coloring, perm treatment, hair washing, treatment, and hair styling in salons such as beauty salons and barber shops, and to coloring, hair washing, treatment, and hair styling at home. In particular, by using the composition in treatment after coloring or perm treatment, it is possible to impart supple elasticity to hair damaged by perm treatment or coloring treatment, and to regenerate healthy hair. The composition can also be used in system treatment using a treatment agent containing multiple agents.

[0081] The hair treatment composition of the present invention can be used as a coloring agent, a perm agent, a shampoo, a treatment, a hair styling agent, etc. From the viewpoint of being able to impart supple elasticity to hair, it is preferably used as a treatment, and it is particularly preferably used as a treatment to be applied after a coloring treatment or a perm treatment.

[0082] The cystine-increasing agent of the present invention can be used for the purpose of increasing cystine. For example, it can be added to a hair treatment composition, applied to animal-derived fiber compositions such as wool and clothing made therefrom to repair damage, added to a food composition to change the physical properties of the protein to adjust the texture, or used in biochemical tests.

Claims

1. A hair treatment composition for treating hair, comprising: A hair treatment composition comprising at least one of a plant extract and a polyphenol, and capable of increasing cystine in hair.

2. A hair treatment composition for treating hair, comprising: The hair treatment composition contains at least one of the following extracts: capillary fern leaf extract, peach leaf extract, sugar maple sap, soapberry extract, mandarin orange peel extract, and witch hazel leaf extract, and has a pH of 7.0 or higher when used.

3. 3. The hair treatment composition according to claim 2, comprising: a plant extract-containing composition containing at least one of a capillary fern leaf extract, a peach leaf extract, a sugar maple sap, a soapberry extract, a mandarin orange peel extract, and a witch hazel leaf extract; and an alkali-containing composition containing an alkaline agent.

4. A hair treatment method for treating hair, comprising: a pH adjustment step of adjusting at least one of a capillary fern leaf extract, a peach leaf extract, a sugar maple sap, a soapberry extract, a mandarin orange peel extract, and a witch hazel leaf extract to a pH of 7.0 or more; applying at least one of a capillary fern leaf extract, a peach leaf extract, a sugar maple sap, a soapberry extract, a mandarin orange peel extract, and a hamamelis virginiana leaf extract to the hair; A hair treatment method comprising:

5. providing a plant extract-containing composition comprising at least one of capillary fern leaf extract, peach leaf extract, sugar maple sap, soapberry extract, mandarin orange peel extract, or witch hazel leaf extract; Providing an alkali-containing composition containing an alkaline agent; mixing the plant extract-containing composition and the alkali-containing composition at the time of use; The hair treatment method according to claim 4, further comprising:

6. A cystine-increasing agent comprising at least one of a plant extract and a polyphenol, and capable of increasing cystine.

7. A method for increasing cystine in hair, comprising an application step of applying at least one of a plant extract or a polyphenol to hair.

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