Hair cosmetic composition for hair straightening and hair care, comprising reducing-agent nanoparticles bound to polyphenols

Abstract

The present invention relates to a hair cosmetic composition for hair straightening and hair care, comprising reducing-agent nanoparticles bound to polyphenols, and, specifically, the reducing agent breaks disulfide bonds of hair so as to loosen curls, and the polyphenols are applied to the hair so as to help the action of the reducing agent and protect the hair. Therefore, if is formulated into a shampoo, the present invention is expected to provide a comprehensive hair care product capable of providing a hair care effect while having a styling effect of straightening frizzy hair.

Description

Cosmetic composition for hair straightening and hair care comprising reducing agent nanoparticles combined with polyphenols

[0001] The present invention relates to an oxygen-reactive polyphenol composition that utilizes polyphenol-reducing agent complex nanoparticles to modify the hair structure, thereby restoring hair styling (straightening) and caring for damaged hair, a method for manufacturing the same, and an application technology.

[0002] With the development of the Internet and social networking services (SNS), a social atmosphere that prioritizes individual personality and personal taste is becoming stronger. In particular, an increasing number of people are using SNS to express themselves and place importance on feedback from others. Consequently, people have begun to pay more attention to their appearance, investing more time and money in skincare, hair care, and fashion management, leading to a steady expansion of related industries.

[0003] Hair styling is one of the important factors determining one's external image, and as interest in this increases, the types and functions of related products are also becoming more diverse. For example, a wide variety of products are being released, including cleansing products such as hair shampoo, conditioner, and cleansing oil, as well as styling products such as hair spray, hair mousse / foam, hair gel, hair wax / pomade, hair cream / lotion, and hair powder, and hair care products such as hair mask / pack, hair essence / oil, hair mist, and hair serum.

[0004] Meanwhile, people's hair characteristics vary depending on genetics, and those with curly or wavy hair often struggle with styling due to the tendency for their hair to become frizzy. In particular, the high humidity and temperatures of summer cause styled hair to easily unravel, become limp, or turn frizzy.

[0005] Frizzy hair is known to occur when water penetrates the hair in a humid environment, altering the chemical bonds within the hair. When styling hair using tools such as hair dryers or irons, moisture evaporates during the drying process, forming hydrogen bonds between protein peptide chains to hold the hairstyle in place. However, if moisture re-penetrates the hair due to high humidity, these hydrogen bonds break, causing the hair to revert to its original state.

[0006] Therefore, in order to solve the aforementioned problems, there is a need for the development of hair cosmetics that can maintain the shape of the hair without damage by breaking down the disulfide structure of the hair and recombining the hair structure solely through the use of hair cosmetics.

[0007] Accordingly, in order to solve the above problem, the inventors of the present invention sought to provide a hair product that can achieve a hair styling effect of straightening curly hair through reducing agent nanoparticles and polyphenol coating, while also enabling hair styling without damage by utilizing the hair care effect of polyphenols. The present invention was completed by determining the content of polyphenol and reducing agent such that reducing agent nanoparticles combined with polyphenols are formed while the above effect is expressed.

[0008] Accordingly, the object of the present invention is to provide a cosmetic composition for hair straightening and hair care comprising reducing agent nanoparticles combined with polyphenols.

[0009] One aspect of the present invention is a cosmetic composition for hair comprising reducing agent nanoparticles combined with polyphenols and a solvent.

[0010] The above-mentioned cosmetic composition for hair is characterized by being for hair straightening and hair care.

[0011] As used in this invention, the term “hair” refers to thread-like structures emerging from the surface of the skin, encompassing both scalp hair and body hair.

[0012] The term “hair straightening” as used in this invention refers to the process of straightening naturally wavy hair, such as curly or wavy hair, or hair that has been artificially modified. In other words, it means eliminating the curves of the hair and maintaining it in a smooth, straight line; to achieve this, it refers to temporarily or semi-permanently altering the shape of the hair by changing its hydrogen bonds or disulfide bonds.

[0013] The term “hair care” as used in this invention refers to any act of managing hair to maintain or improve its health or aesthetic condition. That is, it includes not only keeping hair clean, but also repairing and protecting damaged hair, supplying nutrition and moisture, and maintaining scalp health.

[0014] Therefore, when the present invention is applied to hair, the curls of the hair disappear and are neatly arranged, damaged hair is restored, mechanical strength is improved, the surface becomes smooth, and antistatic properties are imparted.

[0015] The polyphenol of the present invention combines with a reducing agent to increase the size of nanoparticles, and as the polyphenol coats the hair, it brings the distance between the reducing agent and the hair closer, thereby amplifying the action of the reducing agent, and plays a role in restoring hair damage caused by the reducing agent through a Michael addition reaction between the thiol group of the damaged hair and the quinone of the polyphenol.

[0016] The above polyphenol may be one or more selected from the group consisting of gallic acid, tannic acid, catechin, caffeic acid, cyanidin, anthocyanidin, cyanidin-3-glucoside, cyanidin-3-rutinoside, and 2,2',4,4',5,5'-hexahydroxybiphenyl, but is not limited thereto. Preferably, the above polyphenol may be tannic acid, gallic acid, or a combination thereof.

[0017] If the content of the aforementioned polyphenol is insufficient, the coating stability is low and it may be easily deformed by washing; conversely, if the content is excessive, nanoparticles may not form properly and may precipitate. Therefore, an appropriate content of polyphenol is important to provide nanoparticles suitable for cosmetic compositions for hair straightening and hair care.

[0018] Accordingly, when the polyphenol is tannic acid, the tannic acid is based on 1 part by weight of the solvent in an amount of 0.001 to 1 part by weight, 0.001 to 0.5 parts by weight, 0.001 to 0.3 parts by weight, 0.001 to 0.2 parts by weight, 0.001 to 0.1 parts by weight, 0.002 to 1 part by weight, 0.002 to 0.5 parts by weight, 0.002 to 0.3 parts by weight, 0.002 to 0.2 parts by weight, 0.002 to 0.1 parts by weight, 0.005 to 1 part by weight, 0.005 to 0.5 parts by weight, 0.005 to 0.3 parts by weight, 0.005 to 0.2 parts by weight, 0.005 to 0.1 parts by weight, 0.01 to 1 part by weight, 0.01 to It may be included in an amount of 0.5 parts by weight, 0.01 to 0.3 parts by weight, 0.01 to 0.2 parts by weight, 0.01 to 0.1 parts by weight, 0.03 to 1 part by weight, 0.03 to 0.5 parts by weight, 0.03 to 0.3 parts by weight, 0.03 to 0.2 parts by weight, or 0.03 to 0.1 parts by weight. Preferably, the tannic acid may be included in an amount of 0.002 to 0.5 parts by weight based on 1 part by weight of the solvent. More preferably, the tannic acid may be included in an amount of 0.01 to 0.3 parts by weight based on 1 part by weight of the solvent.

[0019] When the above polyphenol is gallic acid, the above gallic acid is present in an amount of 0.001 to 1 part by weight, 0.001 to 0.5 parts by weight, 0.001 to 0.1 parts by weight, 0.001 to 0.08 parts by weight, 0.001 to 0.06 parts by weight, 0.002 to 0.1 parts by weight, 0.002 to 0.08 parts by weight, 0.002 to 0.06 parts by weight, based on 1 part by weight of the above solvent, 0.003 to 0.1 parts by weight, 0.003 to 0.08 parts by weight, 0.003 to 0.06 parts by weight, 0.005 to 0.1 parts by weight, 0.005 to 0.08 parts by weight, 0.005 to 0.06 parts by weight, 0.01 to 0.1 parts by weight, and 0.01 to 0.08 parts by weight. It may be included in a weight part or 0.01 to 0.06 parts by weight. Preferably, the gallic acid may be included in a weight part of 0.002 to 0.06 parts by weight based on 1 part by weight of the solvent.

[0020] When the above polyphenol is a combination of tannic acid and gallic acid, the tannic acid and gallic acid may be included in a weight ratio of 50:1 to 0.5:1, 40:1 to 0.5:1, 30:1 to 0.5:1, 20:1 to 0.5:1, 15:1 to 0.5:1, 10:1 to 0.5:1, 5:1 to 0.5:1, 4:1 to 0.5:1, 3:1 to 0.5:1, 50:1 to 1:1, 40:1 to 1:1, 30:1 to 1:1, 20:1 to 1:1, 15:1 to 1:1, 10:1 to 1:1, 5:1 to 1:1, 4:1 to 1:1, or 3:1 to 1:1.

[0021] The reducing agent of the present invention plays a role in loosening the curls of the hair and taming it by breaking chemical bonds within the hair and changing the hair structure.

[0022] If the content of the above reducing agent is insufficient, a hair straightening effect will not occur; if the content is excessive, hair damage may occur, or nanoparticles may not form and may precipitate. Therefore, an appropriate content of polyphenol is important to provide nanoparticles suitable for hair cosmetic compositions for hair straightening and hair care.

[0023] Accordingly, the reducing agent may be included in an amount of 0.01 to 10 parts by weight, 0.01 to 8 parts by weight, 0.01 to 6 parts by weight, 0.01 to 5 parts by weight, 0.01 to 3 parts by weight, 0.01 to 1 part by weight, 0.05 to 10 parts by weight, 0.05 to 8 parts by weight, 0.05 to 6 parts by weight, 0.05 to 5 parts by weight, 0.05 to 3 parts by weight, 0.05 to 1 part by weight, 0.1 to 10 parts by weight, 0.1 to 8 parts by weight, 0.1 to 6 parts by weight, 0.1 to 5 parts by weight, 0.1 to 3 parts by weight, or 0.1 to 1 part by weight, based on 1 part by weight of the solvent. Preferably, the reducing agent may be included in an amount of 0.1 to 5 parts by weight based on 1 part by weight of the solvent.

[0024] The above reducing agent may be an inorganic reducing agent or an organic reducing agent.

[0025] The above inorganic reducing agent may be one or more selected from the group consisting of sodium sulfate (Na2SO4), sodium sulfite (Na2SO3), sodium bisulfite (NaHSO3), sodium metabisulfite (Na2S2O5), ammonium bissulfite ((NH4)HSO3), ammonium sulfite ((NH4)2SO3), potassium metabisulfite (K2S2O5), potassium sulfite (K2SO3), potassium bisulfite (KHSO3), hydrogen sulfide (H2S), sodium sulfide (Na2S), sodium dithionite (Na2S2O4), sodium hydride (NaH), and potassium hydride (KH), but is not limited thereto. Preferably, the above inorganic reducing agent may be sodium sulfate, sodium sulfite, sodium bisulfite, or sodium metabisulfite, but is not limited thereto.

[0026] The above organic reducing agent may be one or more selected from the group consisting of thiosulfate, thioglycolic acid, thiolactic acid, ammonium thioglycolate, thioglycerol, thiomalic acid, 2-mercaptopropionic acid, 3-mercaptopropionic acid, 2,3-dimercaptosuccinic acid, thiodiglycol, 2-mercaptoethanol, dithiothreitol, thioxanthin, thiosalicylic acid, thiopropionic acid, lipoic acid, cysteine, N-acetylcysteine, cysteamine, cysteine ​​hydrochloride, homocystine, and glutathione, but is not limited thereto.

[0027] The nanoparticles of the present invention are structured to be coated on hair to loosen hair curls while simultaneously providing a hair protection effect. In addition, the nanoparticles have high electrical conductivity, so when coated on hair, they efficiently dissipate the static charge of the hair, thereby providing an excellent antistatic effect.

[0028] The size of the above nanoparticles is 1 to 2000 nm, 1 to 1000 nm, 1 to 500 nm, 1 to 300 nm, 1 to 250 nm, 1 to 200 nm, 5 to 2000 nm, 5 to 1000 nm, 5 to 500 nm, 5 to 300 nm, 5 to 250 nm, 5 to 200 nm, 10 to 2000 nm, 10 to 1000 nm, 10 to 500 nm, 10 to 300 nm, 10 to 250 nm, 10 to 200 nm, 20 to 2000 nm, 20 to 1000 nm, 20 to 500 nm, 20 to 300 nm, 20 to 250 nm, 20 to 200 nm, 30 to It may be 2000 nm, 30 to 1000 nm, 30 to 500 nm, 30 to 300 nm, 30 to 250 nm, 30 to 200 nm, 40 to 2000 nm, 40 to 1000 nm, 40 to 500 nm, 40 to 300 nm, 40 to 250 nm, 40 to 200 nm, 100 to 300 nm, 100 to 250 nm, 100 to 200 nm, 150 to 300 nm, 150 to 250 nm, or 150 to 200 nm, but is not limited thereto.

[0029] The above-mentioned cosmetic composition for hair may be formulated into hair shampoo, hair rinse, hair dye pen, hair tonic, hair conditioner, hair essence, hair lotion, hair treatment, hair cream, hair wax, hair pack, hair oil, hair drying agent, hair preservative, hair dye, hair wavy agent, hair bleaching agent, hair gel, hair glaze, hair lacquer, hair moisturizer, hair mousse, or hair spray. Additionally, it may contain appropriate ingredients depending on the formulation.

[0030] For example, the formulation of the above hair cosmetic composition may be a hair shampoo. In this case, the above composition may further include a shampoo base, and the shampoo base comprises purified water, sodium C14-16 olefin sulfonate, disodium laureth sulfosuccinate, cocamidopropyl hydroxysultaine, sodium cocoyl isethionate, glycerin, lauryl glucoside, sodium chloride, sorbitol, 1,2-hexanediol, panthenol, black sesame extract, black mulberry fruit extract, black truffle extract, black cumin seed extract, black cherry fruit extract, butylene glycol, gua hydroxypropyl trimonium chloride, trideceth-6, trideceth-12, ethylhexylglycerin, niacinamide, caprylyl glycol, polyquaternium-10, succinic acid, menthol, citric acid, hydrochloric acid, salicylic acid, maltodextrin, It may include, but is not limited to, one or more selected from the group consisting of amodimethicone, fragrance, limonene, linalool, hexyl cinnamal, benzyl benzoate, citronellol, eugenol, citral, benzyl alcohol, geraniol, cinnamal, coumarin, and amyl cinnamal.

[0031] Based on 1 part by weight of the solvent, the above shampoo base comprises 1 to 1000 parts by weight, 1 to 500 parts by weight, 1 to 300 parts by weight, 1 to 200 parts by weight, 1 to 100 parts by weight, 1 to 80 parts by weight, 1 to 50 parts by weight, 1 to 40 parts by weight, 1 to 30 parts by weight, 5 to 1000 parts by weight, 5 to 500 parts by weight, 5 to 300 parts by weight, 5 to 200 parts by weight, 5 to 100 parts by weight, 5 to 80 parts by weight, 5 to 50 parts by weight, 5 to 40 parts by weight, 5 to 30 parts by weight, 10 to 1000 parts by weight, 10 to 500 parts by weight, 10 to 300 parts by weight, 10 to 200 parts by weight, 10 to 100 parts by weight, and 10 to It may be included in 80 parts by weight, 10 to 50 parts by weight, 10 to 40 parts by weight, 10 to 30 parts by weight, 20 to 1000 parts by weight, 20 to 500 parts by weight, 20 to 300 parts by weight, 20 to 200 parts by weight, 20 to 100 parts by weight, 20 to 80 parts by weight, 20 to 50 parts by weight, 20 to 40 parts by weight, or 20 to 30 parts by weight.

[0032] The hair cosmetic composition of the present invention may be composed of a first agent of one formulation and a second agent of a formulation different from that of the first agent. In such cases, the first agent and the second agent may each be a hair cosmetic composition comprising a reducing agent nanoparticle combined with a polyphenol, or only one of the first agent and the second agent may be a hair cosmetic composition comprising a reducing agent nanoparticle combined with a polyphenol. For example, the hair cosmetic composition may include a hair shampoo, which is a hair cosmetic composition comprising a reducing agent nanoparticle combined with a polyphenol, as the first agent, and a hair conditioner composition comprising only the polyphenol as the second agent.

[0033] The present invention relates to a cosmetic composition for hair comprising reducing agent nanoparticles combined with polyphenols, wherein the cosmetic composition for hair is intended for hair straightening and hair care effects. Specifically, the reducing agent breaks the disulfide bonds of the hair to straighten frizzy hair, and the polyphenol coats the hair to assist the action of the reducing agent while simultaneously providing a hair protection effect.

[0034] In particular, when the present invention is formulated into a shampoo and applied to hair, it can be confirmed that after washing, frizzy hair is calmed down, and damaged hair (thiol groups) caused by the reducing agent reacts with polyphenols to be restored, thereby improving the mechanical strength of the hair, making the hair surface smooth, and providing antistatic properties.

[0035] FIG. 1 is an image immediately after preparation of cosmetic compositions for hair straightening and hair care according to Examples 1 to 25 and Comparative Examples 1 to 6 of the present invention.

[0036] FIG. 2 is a hair image showing a change in hair styling after applying cosmetic compositions according to Examples 1 to 7, 9 to 14, 16 to 19, 21 to 24 and Comparative Examples 1 to 6 of the present invention to hair.

[0037] FIG. 3 is a graph showing the TNB concentration produced by cosmetic compositions according to Examples 1 to 7, 9 to 14, 16 to 19, 21 to 24 and Comparative Examples 1 to 6 of the present invention.

[0038] FIG. 4 is a hair image showing a change in hair styling after applying a shampoo composition according to Examples 26 to 38 and Comparative Examples 7 to 12 of the present invention to hair.

[0039] FIG. 5 is a graph showing the relative content of damaged hair (thiol groups) in the hair of damaged hair samples treated with shampoo compositions according to Examples 26 to 38 and Comparative Examples 7 to 12 of the present invention.

[0040] FIG. 6 is a graph showing the tensile strain when a tensile test is performed on a hair sample treated with a shampoo composition according to Examples 26 to 38 and Comparative Examples 7 to 12 of the present invention using a universal testing machine.

[0041] FIG. 7 is a surface image of hair observed by scanning electron microscope (SEM) of hair treated with shampoo compositions according to Examples 26, 30, 35, 38 and Comparative Examples 7 to 12 of the present invention.

[0042] FIG. 8 is an image confirming whether static electricity is generated when a charged rubber balloon is brought to a hair sample treated with a shampoo composition according to Examples 26, 30, 35, 38 and Comparative Examples 7 to 12 of the present invention.

[0043] One aspect of the present invention is a cosmetic composition for hair comprising reducing agent nanoparticles combined with polyphenols and a solvent.

[0044] The above-mentioned cosmetic composition for hair is characterized by being for hair straightening and hair care.

[0045] The above polyphenol may be tannic acid, gallic acid, or a combination thereof.

[0046] The above tannic acid may be included in an amount of 0.001 to 1 weight part based on 1 weight part of the solvent.

[0047] The gallic acid may be included in an amount of 0.001 to 0.1 parts by weight based on 1 part by weight of the solvent.

[0048] The above reducing agent may be included in an amount of 0.01 to 5 parts by weight based on 1 part by weight of the solvent.

[0049] The above reducing agent may be an inorganic reducing agent or an organic reducing agent.

[0050] The above-mentioned inorganic reducing agent may be sodium sulfate, sodium sulfite, sodium bisulfite, or sodium metabisulfite.

[0051] The above organic reducing agent may be cysteine.

[0052] The size of the above nanoparticles may be 20 to 2000 nm.

[0053] The formulation of the above hair cosmetic composition may be a hair shampoo.

[0054] The above composition may further comprise a shampoo base, wherein the shampoo base comprises purified water, sodium C14-16 olefin sulfonate, disodium laureth sulfosuccinate, cocamidopropyl hydroxysultaine, sodium cocoyl isethionate, glycerin, lauryl glucoside, sodium chloride, sorbitol, 1,2-hexanediol, panthenol, black sesame extract, black mulberry fruit extract, black truffle extract, black cumin seed extract, black cherry fruit extract, butylene glycol, gua hydroxypropyl trimonium chloride, trideceth-6, trideceth-12, ethylhexylglycerin, niacinamide, caprylyl glycol, polyquaternium-10, succinic acid, menthol, citric acid, hydrochloric acid, salicylic acid, maltodextrin, It may include one or more selected from the group consisting of amodimethicone, fragrance, limonene, linalool, hexyl cinnamal, benzyl benzoate, citronellol, eugenol, citral, benzyl alcohol, geraniol, cinnamal, coumarin, and amyl cinnamal.

[0055] The above shampoo bay may be included in an amount of 10 to 100 parts by weight based on 1 part by weight of the solvent.

[0056] One or more specific examples are described in more detail below through embodiments. However, these embodiments are intended to illustrate one or more specific examples and the scope of the present invention is not limited to these embodiments.

[0057]

[0058] Preparation of cosmetic compositions: Examples 1 to 25 and Comparative Examples 1 to 6

[0059] Examples 1 to 25 and Comparative Examples 1 to 6 prepared cosmetic compositions for hair straightening and hair care by adding polyphenol, a reducing agent, and a solvent in amounts (unit: g) indicated in Table 1 below to a reaction vessel exposed to nitrogen, stirring at 100 to 300 rpm for 5 minutes at 60°C, and then stirring at 100 to 300 rpm for 12 hours at 25°C.

[0060] Name Polyphenol (g) Inorganic reducing agent (g) Organic reducing agent (g) Solvent (g) Tannic acid Sodium sulfate gallate Sodium sulfite Sodium bisulfite Sodium metabisulfite Cysteine ​​Water of Purification Comparative Example 100000001 Comparative Example 20.050000001 Comparative Example 300.01000001 Comparative Example 40.050.01000001 Comparative Example 5000.300001 Comparative Example 60000000.31 Example 10.050.010.300001 Example 20.050.0100.30001 Example 30.050.01000.3001 Example 40.050.010000.301 Example 50.050.010.0100001 Example 60.050.011.500001 Example 70.050.01300001 Example 80.050.01600001 Example 90.050.0100000.031 Example 100.050.0100000.31 Example 110.050.0100001.51 Example 120.0020.0020.300001 Example 130.050.030.300001 Example 140.050.050.300001 Example 150.050.10.300001 Example 160.00200.300001 Example 170.0100.300001 Example 180.0500.300001 Example 190.1500.300001 Example 20100.300001 Example 2100.0020.300001 Example 2200.0050.300001 Example 2300.010.300001 Example 2400.050.300001 Example 2500.10.300001

[0061]

[0062] Preparation of shampoo compositions: Examples 26 to 38 and Comparative Examples 7 to 12

[0063] Examples 26 to 38 and Comparative Examples 7 to 12 prepared compositions for hair straightening and hair care by adding polyphenol, a reducing agent, and a solvent in amounts (unit: g) indicated in Table 2 below to a reaction vessel exposed to nitrogen, stirring at 100 to 300 rpm for 5 minutes at 60°C, and then stirring at 100 to 300 rpm for 12 hours at 25°C.

[0064] Subsequently, as a shampoo base to the above composition, purified water, sodium C14-16 olefin sulfonate, cocamidopropyl betaine, glycerin, sodium chloride, gua hydroxypropyl trimonium chloride, sodium benzoate, polyquaternium-10, dexpanthenol, polyquaternium-7, citric acid, disodium EDTA, menthol, salicylic acid, butylene glycol, 1,2-hexanediol, and sodium hyaluronate were further added, and the mixture was stirred at 50 to 100 rpm for 5 minutes at 50°C to prepare a shampoo composition for hair straightening and hair care.

[0065] Name Polyphenol (g) Inorganic reducing agent (g) Organic reducing agent (g) Solvent (g) Base (g) Tannic acid Gallate Sodium sulfate Sodium sulfite Sodium bisulfite Sodium metabisulfite Cysteine ​​Water of Purification Comparative Example 70000000130 Comparative Example 80.05000000130 Comparative Example 900.0100000130 Comparative Example 100.050.0100000130 Comparative Example 11000.30000130 Comparative Example 120000000.3130 Example 260.050.010.30000130 Example 270.050.0100.3000130 Example 280.050.01000.300130 Example 290.050.010000.30130 Example 300.050.0100000.3130 Example 310.050.010.010000130 Example 320.050.011.50000130 Example 330.050.030.30000130 Example 340.050.050.30000130 Example 350.0500.30000130 Example 360.1500.30000130 Example 3700.010.30000130 Example 3800.050.30000130

[0066]

[0067] Experimental Example 1. Confirmation of the stability of a cosmetic composition for hair straightening and hair care

[0068] The stability of each cosmetic composition for hair straightening and hair care prepared according to Examples 1 to 25 and Comparative Examples 1 to 6 was visually checked immediately after preparation.

[0069] As shown in Figure 1, in Example 8, it was confirmed that the composition aggregated and precipitated through a chelation reaction with polyphenol due to an excessive content of inorganic reducing agent. In Example 15, it was confirmed that undissolved gallic acid precipitated due to an excessive content of gallic acid. In Example 20, it was confirmed that undissolved tannic acid precipitated due to an excessive content of tannic acid. In Example 25, it was confirmed that undissolved gallic acid precipitated by adding a gallic acid content greater than the solubility of gallic acid. From this, it was confirmed that the cosmetic compositions of Examples 8, 15, 20, and 25 had reduced solubility and stability.

[0070] In addition, it was confirmed that using organic reducing agents is difficult due to their characteristic scent.

[0071]

[0072] Experimental Example 2. Confirmation of the structure of a cosmetic composition for hair straightening and hair care

[0073] The compositions of Examples 1 to 7, 9 to 14, 16 to 19, 21 to 24 and Comparative Examples 1 to 6 were structurally analyzed using FT-IR (Madison, Thermo Scientific) and a nanoparticle size analyzer (Zetasize Nano, Malvern). Table 3 below shows the FT-IR spectra of each composition, and Table 4 below shows the particle sizes.

[0074] Hydroxyl group peak position (OH, cm -1)Comparative Example 1-Comparative Example 23400 Comparative Example 33400 Comparative Example 43495 Comparative Example 5-Comparative Example 63353 Example 13515 Example 23514 Example 33514 Example 43513 Example 53510 Example 63517 Example 73517 Example 93510 Example 103514 Example 113515 Example 123491 Example 133513 Example 143515 Example 163400 Example 173412 Example 183454 Example 193482 Example 213403 Example 223430 Example 233463 Example 243485

[0075]

[0076] Examples 1 to 7, 9 to 14, 18 to 19, 22 to 24 and Comparative Example 4 showed a further shift in the hydroxyl group peak compared to Comparative Examples 2 to 3 and 6. Examples 16 and 21 did not show a shift in the hydroxyl group peak because the hydrogen bonding was not strong, but Examples 1 to 7, 9 to 14, and 16 to 24, which contained an inorganic or organic reducing agent and a polyphenol, showed increased hydrogen bonding due to the compounds being closely bonded to each other, as confirmed by the positional shift of the hydroxyl group peak.

[0077] Particle Size (nm) Comparative Example 10 ± 0.1 Comparative Example 2124.5 ± 4 Comparative Example 351.5 ± 6 Comparative Example 4168.5 ± 5 Comparative Example 50.9 ± 0.3 Comparative Example 610.5 ± 1.2 Example 1173.5 ± 4 Example 2173.4 ± 6 Example 3173.9 ± 3 Example 4174.2 ± 4 Example 5173.2 ± 5 Example 6176.4 ± 8 Example 7178.4 ± 4 Example 9171.1 ± 5 Example 10174.4 ± 3 Example 11181.5 ± 4 Example 12158.2 ± 2 Example 13174.4 ± 4 14181.4 ± Example 5 16132.9 ± Example 2 17155.8 ± Example 3 18164.8 ± Example 6 19210.3 ± Example 5 2139.5 ± Example 4 2242.5 ± Example 3 2353.1 ± Example 5 2462.4 ± 3

[0078]

[0079] It was confirmed that Examples 1 to 7 showed an increase in particle size compared to Comparative Example 4, due to bonding between polyphenols and inorganic reducing agents through a chelation reaction. Similarly, Examples 9 to 11 showed an increase in particle size compared to Comparative Example 4, due to bonding between polyphenols and organic reducing agents through hydrogen bonding. Examples 12 to 14 showed an increase in particle size as the proportion of gallic acid increased, leading to more chelation reactions between gallic acid and inorganic reducing agents. Examples 16 to 19 showed an increase in particle size as the content of tannic acid increased, as the chelation reaction with inorganic reducing agents occurred more effectively. Examples 21 to 24 showed an increase in particle size as the content of gallic acid increased, as the chelation reaction with inorganic reducing agents occurred more effectively.

[0080]

[0081] Experimental Example 3. Confirmation of conductivity of cosmetic composition for hair straightening and hair care

[0082] The compositions prepared according to Examples 1 to 7, 9 to 14, 16 to 19, 21 to 24 and Comparative Examples 1 to 6 were dip-coated onto a silicon wafer (Si wafer) substrate at room temperature for 12 hours. After dip-coating, the substrate was washed with distilled water and dried to obtain a substrate coated with a cosmetic composition for hair straightening and hair care. The conductivity of the cosmetic composition for hair straightening and hair care was measured on the obtained substrate using a Sourcemeter (Keithley 2450). Each measurement was performed three times, and the average of the measured values ​​is shown in Table 5 below.

[0083] Resistance (MΩ / cm) 2Comparative Example 119.8 Comparative Example 22.94 Comparative Example 32.51 Comparative Example 42.25 Comparative Example 51.68 Comparative Example 615.2 Example 11.23 Example 21.35 Example 31.29 Example 41.31 Example 52.19 Example 61.11 Example 71.08 Example 92.21 Example 101.31 Example 111.13 Example 124.12 Example 131.21 Example 141.18 Example 165.47 Example 173.98 Example 181.35 Example 191.17 Example 214.21 Example 223.56 Example 231.85 Example 241.31

[0084]

[0085] Comparative Example 5 had ionic conductivity and relatively low resistance, but it was confirmed that Comparative Example 6 had higher resistance and lower conductivity compared to Comparative Examples 1 to 5. Examples 1 to 7, 9 to 14, 16 to 19, and 21 to 24 were confirmed to have lower resistance compared to Comparative Example 1 due to the surface coating of polyphenol and reducing agent. Examples 1 to 7, 9 to 11, 13 to 14, 18 to 19, and 23 to 24 were found to exhibit excellent antistatic effects by having higher conductivity than Comparative Examples 1 to 4 and efficiently dissipating the electrostatic charge of the hair. Examples 12, 16 to 17, and 21 to 22 had lower content of tannic acid and gallic acid, so their resistance was relatively higher than Comparative Examples 2 to 4, but it was confirmed that they exhibited antistatic effects through a decrease in resistance compared to Comparative Example 1.

[0086]

[0087] Experimental Example 4. Confirmation of surface contact angle of cosmetic composition for hair straightening and hair care

[0088] The compositions prepared according to Examples 1 to 7, 9 to 14, 16 to 19, 21 to 24 and Comparative Examples 1 to 6 were dip-coated onto a silicon wafer (Si wafer) substrate at room temperature for 12 hours. After dip-coating, the substrate was washed with distilled water and dried to obtain a substrate coated with a cosmetic composition for hair straightening and hair care. The surface contact angle of the cosmetic composition for hair straightening and hair care was measured on the obtained substrate using a contact angle meter (Contact angle, DO3210, Kruss), and measurements were taken before and after washing during 10 washes. Each measurement was performed three times, and the average of the measurements is shown in Table 6 below.

[0089] Surface Contact Angle (°) Before Cleaning After Cleaning Comparative Example 190 90.2 Comparative Example 211.7 11.7 Comparative Example 364.9 64.8 Comparative Example 413.2 13.1 Comparative Example 554.2 90.2 Comparative Example 642.5 90.1 Example 118.2 18.2 Example 218.5 18.5 Example 318.4 18.4 Example 418.3 18.3 Example 518.5 18.5 Example 618.4 18.4 Example 718.6 18.6 Example 918.4 18.4 Example 1045.1 45.1 Example 1146.1 46.1 Example 1223.1 25.3 Example 1319.519.5 Example 1420.120.1 Example 1623.825.8 Example 1715.715.9 Example 1811.011.0 Example 1910.810.8 Example 2178.182.1 Example 2274.674.6 Example 2378.578.5 Example 2476.876.8

[0090]

[0091] Examples 1 to 7, 9 to 14, 18 to 19, 22 to 24 and Comparative Examples 2 to 4 showed almost no change in the surface contact angle of the coated surface even after washing 10 times with distilled water, whereas Examples 12, 16, and 21 showed a slight change in the contact angle of the coated surface after washing 10 times with distilled water, and Comparative Examples 5 to 6 showed a large change in the contact angle. Through this, it was confirmed that the coating stability of a surface coated with a cosmetic composition for hair straightening and hair care that does not contain polyphenols decreases when exposed to frequent washing.

[0092]

[0093] Experimental Example 5. Evaluation of Hair Styling Changes of a Cosmetic Composition for Hair Straightening and Hair Care

[0094] Wavy hair was immersed in the compositions of Examples 1 to 7, 9 to 14, 16 to 19, 21 to 24 and Comparative Examples 1 to 6 and left for 30 minutes. Afterward, the hair was washed with water and shampoo, and changes in the hair were checked (Fig. 2).

[0095] It was confirmed that hair treated with the compositions of Comparative Examples 1 to 4 showed no change in hair curl. It was confirmed that in Comparative Examples 5 to 6, the reducing agent changed the structure of the hair, causing the hair curl to loosen and become neatly arranged.

[0096] As a result of treating with the compositions of Examples 1 to 4, it was confirmed that regardless of the type of inorganic reducing agent, the inorganic reducing agent changes the hair structure, causing the curls to disappear and the hair to become calm and neat. When comparing the changes in hair styling according to the content of the inorganic reducing agent in Examples 5 to 7, it was confirmed that in Example 5, the hair curls were maintained because the content of the inorganic reducing agent was low, whereas in Examples 6 and 7, the hair curls loosened and the hair became calm and neat due to the increased inorganic reducing agent.

[0097] In Examples 9 to 11, changes in hair styling according to the content of the organic reducing agent were compared. In Example 9, the hair curl was maintained due to the low content of the organic reducing agent, while in Examples 10 and 11, it was confirmed that the hair curl was loosened and styled calmly due to the increased organic reducing agent.

[0098] As a result of comparing the changes in hair styling according to the ratio of tannic acid and gallic acid in Examples 12 to 14, Examples 16 to 19, and Examples 21 to 24, it was confirmed that compared to Example 1, the hair curls loosened and were styled calmly due to the inorganic reducing agent, regardless of the polyphenol content.

[0099] This is because the polyphenol in the cosmetic composition for hair straightening and hair care forms a chelation with an inorganic reducing agent or a hydrogen bond with an organic reducing agent, thereby bringing the distance between the reducing agent and the hair closer when the polyphenol is coated on the hair, which accelerates the reaction rate; thus, a superior effect in styling straightening was confirmed compared to Comparative Examples 5 and 6, in which an inorganic reducing agent or an organic reducing agent was used alone.

[0100]

[0101] Experimental Example 6. Evaluation of TNB formation characteristics of cosmetic compositions for hair straightening and hair care

[0102] 4 mg of DTNB (5,5′-Dithiobis(2-nitrobenzoic acid)) was dissolved in 1 mL of 2% SDS (sodium dodecyl sulfate) aqueous solution, and then a DTNB solution was prepared.

[0103] 0.25 mL of cosmetic compositions for hair straightening and hair care prepared according to Examples 1 to 7, 9 to 14, 16 to 19, 21 to 24 and Comparative Examples 1 to 6 were mixed with 0.05 mL of DTNB solution and 2.5 mL of 2% SDS aqueous solution and incubated at room temperature for 15 minutes. The concentration of TNB (2-nitro-5-mercaptobenzoic acid) generated in the mixed solution was measured by comparing the 412 nm absorbance peaks using UV-Vis, and the results are shown in Figure 3 and Table 7.

[0104] Referring to Figure 3 and Table 7, it can be seen that Comparative Examples 2 to 4, which contain only polyphenols and no reducing agent, did not show a significant increase in TNB compared to Comparative Example 1. On the other hand, it was confirmed that the TNB concentration increased in Comparative Examples 5 to 6, which contain an inorganic reducing agent or an organic reducing agent. This is because the disulfide bonds of DTNB were broken by the inorganic reducing agent (sodium sulfate) or the organic reducing agent (cysteine), and TNB was formed.

[0105] Additionally, when comparing the TNB formation concentrations in Examples 1 to 4 prepared according to the type of inorganic reducing agent (sodium sulfate, sodium sulfite, sodium bisulfite, and sodium metabisulfite), it was confirmed that the results were similar. Furthermore, when comparing the TNB concentrations in Examples 1, 5 to 7, and 9 to 11 prepared according to the content of the reducing agent sodium sulfate or cysteine, it was shown that the TNB formation concentration increased as the content of the reducing agent sodium sulfate or cysteine ​​increased. As the content of the reducing agent increased, more disulfide bonds of DTNB were broken, and consequently, the amount of TNB formed increased.

[0106] In addition, to compare the TNB formation concentration according to the content of polyphenols tannic acid and gallic acid, the TNB formation concentrations in cosmetic compositions for hair straightening and hair care prepared according to Examples 12 to 14, 16 to 24, and Comparative Example 5 were compared. When Examples 12 to 14 and 16 to 24 were compared with Example 1 and Comparative Example 5, it was confirmed that the TNB formation concentration decreased as the content of tannic acid and gallic acid increased. However, among them, Examples 12, 16, and 21 had low content of tannic acid and gallic acid, so it was confirmed that no distinct change in TNB concentration was observed.

[0107] This is because when polyphenol-containing nanoparticles are treated, the thiol structure of TNB generated by an inorganic or organic reducing agent undergoes a Michael addition reaction with the quinone of the polyphenol, resulting in a decrease in the concentration of TNB.

[0108] Classification Generated TNB Concentration (mM) Comparative Example 10.000 Comparative Example 20.030 Comparative Example 30.000 Comparative Example 40.010 Comparative Example 50.494 Comparative Example 61.730 Example 10.041 Example 20.059 Example 30.065 Example 40.061 Example 50.027 Example 60.078 Example 70.160 Example 90.080 Example 100.340 Example 111.170 Example 120.394 Example 130.032 Example 140.018 Example 160.481 Example 170.161 Example 180.114 190.107 Example 210.157 Example 220.102 Example 230.081 Example 240.035

[0109]

[0110] Experimental Example 7. Changes in hair styling of a shampoo composition for hair straightening and hair care

[0111] Changes in hair styling were evaluated using shampoo compositions for hair straightening and hair care prepared according to Examples 26 to 38 and Comparative Examples 7 to 12.

[0112] Wave hair samples were shampooed and dried using shampoo compositions for hair straightening and hair care according to Examples 26 to 38 and Comparative Examples 7 to 12, respectively. Images of the hair after drying are shown in FIG. 4.

[0113] It was confirmed that there was no change in the hair curl when treated with the compositions of Comparative Examples 7 to 10. When treated with the compositions of Comparative Examples 11 to 12, it was confirmed that the hair curls loosened and were neatly arranged as the reducing agent changed the structure of the hair.

[0114] As a result of treating with the compositions of Examples 26 to 30, it was confirmed that regardless of the type of reducing agent (inorganic reducing agent, organic reducing agent), the reducing agent changes the hair structure, causing the curls to disappear and the hair to become calm and tidy. However, it was confirmed that shampoos using organic reducing agents are not suitable as shampoos due to the characteristic scent of organic reducing agents.

[0115] As a result of comparing the changes in hair styling according to the content of the inorganic reducing agent in Examples 31 and 32, it was confirmed that in Example 31, the effect of loosening the hair curls was minimal because the content of the inorganic reducing agent was low, while in Example 32, it was confirmed that the hair curls loosened and were styled calmly due to the inorganic reducing agent.

[0116] As a result of comparing the changes in hair styling according to the ratio of tannic acid and gallic acid in Examples 33 to 38, it was confirmed that compared to Example 26, the hair curls loosened and were styled calmly due to the inorganic reducing agent regardless of polyphenol.

[0117] This is because the polyphenol in the shampoo composition for hair straightening and hair care forms a chelation with an inorganic reducing agent or a hydrogen bond with an organic reducing agent, thereby bringing the distance between the reducing agent and the hair closer when the polyphenol is coated on the hair, which accelerates the reaction rate; thus, a superior effect in styling straightening was confirmed compared to Comparative Examples 11 and 12, in which an inorganic reducing agent or an organic reducing agent was used alone.

[0118]

[0119] Experimental Example 8. Evaluation of the relative content of damaged hair (thiol groups) in a shampoo composition for hair straightening and hair care

[0120] 4 mg of DTNB (5,5′-Dithiobis(2-nitrobenzoic acid)) was dissolved in 1 mL of 2% SDS (sodium dodecyl sulfate) aqueous solution, and then 90 μL was diluted in 4.91 mL of 2% SDS (sodium dodecyl sulfate) aqueous solution to prepare a DTNB solution.

[0121] Damaged hair samples treated with shampoo compositions for hair straightening and hair care prepared according to Examples 26 to 38 and Comparative Examples 7 to 12 were immersed in a DTNB solution and incubated at room temperature for 15 minutes. The relative content (%) of damaged hair (thiol groups) in the mixed solution was measured by comparing the 412 nm absorbance peaks using UV-Vis, and the results are shown in Figure 5 and Table 8.

[0122] Referring to Figure 5 and Table 8, it was confirmed that Comparative Examples 8 to 10, which contain only polyphenols and do not contain reducing agents, showed a decrease in the relative content of damaged hair (thiol groups) compared to Comparative Example 7. Additionally, it was confirmed that Comparative Examples 11 to 12 showed an increase in the relative content of damaged hair (thiol groups). This is because, upon treatment with a shampoo containing polyphenols, the quinones of the polyphenols reacted with the thiol structure of the damaged hair through a Michael addition reaction, thereby reducing the relative content of damaged hair (thiol groups) within the hair. Meanwhile, inorganic reducing agents (sodium sulfate, sodium sulfite, sodium bisulfite, and sodium metabisulfite) or organic reducing agents (cysteine) contained in the shampoo break down the disulfide structure of hair keratin, thus increasing the relative content of damaged hair (thiol groups) within the hair.

[0123] Additionally, Examples 26 to 30 were compared to evaluate the relative content of damaged hair (thiol groups) in the hair according to the type of reducing agent (inorganic reducing agent and organic reducing agent). Although there was no significant difference in the relative content of damaged hair (thiol groups) in the hair according to the type of inorganic reducing agent (sodium sulfate, sodium sulfite, sodium bisulfite, sodium metabisulfite), it was found that the relative content of damaged hair (thiol groups) in the hair increased when the organic reducing agent cysteine ​​was included compared to when the inorganic reducing agent was included.

[0124] Examples 26, 31 to 32 were compared to compare the relative content of damaged hair (thiol groups) in the hair according to the content of the reducing agent. It was confirmed that as the content of sodium sulfate, the reducing agent, increased, it broke more disulfide bonds in the hair, resulting in an increase in the relative content of damaged hair (thiol groups) in the hair.

[0125] Additionally, Examples 33 to 38 and Comparative Example 11 were compared to compare the relative content of damaged hair (thiol groups) in the hair according to the content of polyphenols, gallic acid and tannic acid. It was confirmed that the relative content of damaged hair (thiol groups) in the hair decreased as the content of polyphenols, gallic acid and tannic acid, increased, but it was confirmed that when the tannic acid content exceeded 50 mg, there was no significant change in the relative content of damaged hair (thiol groups) in the hair. This is because when treated with a shampoo containing polyphenols, the thiol structure generated by the reducing agent undergoes a Michael addition reaction with the quinone of the polyphenol, so the relative content of damaged hair (thiol groups) in the hair decreased further compared to the case where only the reducing agent was used.

[0126] Classification Relative content (%) of damaged hair (thiol groups) in hair @ 412 nm Comparative Example 7100 Comparative Example 830.1 Comparative Example 943.7 Comparative Example 1012.1 Comparative Example 11142 Comparative Example 12160 Example 2623.5 Example 2724.4 Example 2824.7 Example 2924.2 Example 3064.5 Example 3117.1 Example 3287.1 Example 3310.8 Example 347.9 Example 3537.2 Example 3635.9 Example 3748.1 Example 3836.8

[0127]

[0128] Experimental Example 9. Confirmation of mechanical strength of hair treated with a shampoo composition for hair straightening and hair care

[0129] Shampoo compositions for hair straightening and hair care prepared according to Examples 26 to 38 and Comparative Examples 7 to 12 were applied to damaged hair samples, and then washed off with water after 30 minutes. The hair samples were completely dried with a dryer.

[0130] Tensile tests were performed on damaged hair samples treated with the shampoo compositions using a universal testing machine (SurTA Extra 1A system, Chemilab Co.). The distance between the grips of the universal testing machine was set to 13.5 cm, and the damaged hair samples were placed between them and subjected to tensile testing at a speed of 10 mm / s. Each measurement was taken three times, and the tensile strain (%) of the damaged hair samples treated with the shampoo compositions of Examples 26 to 38 and Comparative Examples 7 to 12 is shown in Fig. 6.

[0131] Referring to FIG. 6, it was confirmed that the tensile strain of hair samples treated with the shampoo compositions of Comparative Examples 8 to 10 increased from 43.6% to 54.7%, 53.4%, and 56.4% compared to the damaged hair sample treated with the shampoo composition of Comparative Example 7. This indicates that mechanical strength is improved by restoring damaged hair through the coating of polyphenols.

[0132] In Comparative Examples 11 and 12, it was confirmed that the tensile strain decreased to 24.8% (Comparative Example 11) and 5.2% (Comparative Example 12) as hair damage occurred due to the reducing agent (inorganic reducing agent or organic reducing agent).

[0133] It was confirmed that the tensile strain of the hair samples treated with Examples 26 to 38 increased compared to Comparative Example 7. This indicates that, despite the hair being damaged by the reducing agent, the mechanical strength is improved through the restoration of hair damage by the polyphenols coated on the hair by the polyphenols combined with the reducing agent in the hair straightening and hair care compositions.

[0134] Classification Hair Breakage Improvement Rate (%, Tensile Strain) Comparative Example 7 43.6 Comparative Example 8 54.7 Comparative Example 9 53.4 Comparative Example 10 56.4 Comparative Example 11 24.8 Comparative Example 125.2 Example 2 6 55.6 Example 2 7 54.3 Example 2 8 54.3 Example 2 9 53.6 Example 3 0 52.7 Example 3 1 55.3 Example 3 2 55.3 Example 3 3 56.1 Example 3 4 56.8 Example 3 5 55.1 Example 3 6 56.3 Example 3 7 52.3 Example 3 8 56.8

[0135]

[0136] Experimental Example 10. Confirmation of the surface condition of hair treated with a shampoo composition for hair straightening and hair care

[0137] The compositions of Examples 26, 30, 35, 38 and Comparative Examples 7 to 12 were applied to damaged hair samples, and then washed off with water after 30 minutes. The hair samples were prepared by completely drying them with a hair dryer.

[0138] The surface of each hair sample was observed using a scanning electron microscope (JSM-6700F, JEOL) and is shown in Fig. 7 (the inserted scale bar represents 10 μm).

[0139] Referring to FIG. 7, in the hair samples treated with the shampoo compositions of Comparative Examples 7 and 11 to 12, the hair surface was found to be rough or damaged, and in particular, in the case of Comparative Examples 11 to 12, it was confirmed that more hair damage occurred due to the inorganic or organic reducing agent. In the hair samples treated with the shampoo compositions of Examples 26, 30, 35, 38 and Comparative Examples 8 to 10, it was confirmed that the hair surface was coated due to the polyphenols included in the shampoo composition, resulting in a smooth surface.

[0140]

[0141] Experimental Example 11. Evaluation of antistatic properties of hair treated with a shampoo composition for hair straightening and hair care

[0142] The shampoo compositions of Examples 26, 30, 35, 38 and Comparative Examples 7 to 12 were applied to damaged hair samples, and then washed with water after 30 minutes. The hair samples were prepared by completely drying them with a hair dryer. A rubber balloon was filled with air, rubbed three times with a cotton cloth, and then placed near each hair sample, and the results are shown in FIG. 8.

[0143] Referring to FIG. 8, it was confirmed that static electricity was generated in the hair samples treated with the shampoo compositions of Comparative Examples 7 and 11 to 12, and in particular, in the case of Comparative Examples 11 to 12, it was confirmed that more damage occurred to the hair due to the inorganic or organic reducing agent, resulting in more severe static electricity. In the case of hair samples treated with the shampoo compositions of Examples 26, 30, 35, 38 and Comparative Examples 8 to 10, it was confirmed that antistatic properties were imparted due to the conductivity of the polyphenols included in the shampoo compositions.

[0144]

[0145] The present invention has been described above with reference to its preferred embodiments. Those skilled in the art will understand that the present invention may be embodied in modified forms without departing from the essential characteristics of the invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the invention is defined by the claims, not by the foregoing description, and all variations within the scope of the claims should be interpreted as being included in the invention.

[0146] The present invention relates to a cosmetic composition for hair straightening and hair care comprising reducing agent nanoparticles combined with polyphenols. Specifically, the reducing agent breaks the disulfide bonds of the hair to loosen curls, while the polyphenol coats the hair to assist the action of the reducing agent and protect the hair. Therefore, when the present invention is formulated into a shampoo, it is possible to provide a comprehensive hair care product that straightens frizzy hair to provide a styling effect while also promoting hair care effects.

Claims

1. A cosmetic composition for hair comprising reducing agent nanoparticles combined with polyphenol and a solvent, wherein The above-mentioned cosmetic composition for hair is a cosmetic composition for hair straightening and hair care.

2. In Paragraph 1, A cosmetic composition for hair, wherein the above polyphenol is one or more selected from the group consisting of gallic acid, tannic acid, catechin, caffeic acid, cyanidin, anthocyanidin, cyanidin-3-glucoside, cyanidin-3-rutinoside, and 2,2',4,4',5,5'-hexahydroxybiphenyl.

3. In Paragraph 2, The above polyphenol is tannic acid, gallic acid, or a combination thereof, and The above tannic acid is included in an amount of 0.001 to 1 weight part based on 1 weight part of the solvent, and A cosmetic composition for hair, wherein the gallic acid is included in an amount of 0.001 to 0.1 parts by weight based on 1 part by weight of the solvent.

4. In Paragraph 3, The above polyphenol is a combination of tannic acid and gallic acid, and A cosmetic composition for hair, wherein the weight ratio of the tannic acid and gallic acid is 15:1 to 0.5:

1.

5. In Paragraph 1, A cosmetic composition for hair, wherein the reducing agent is included in an amount of 0.01 to 5 parts by weight based on 1 part by weight of the solvent.

6. In Paragraph 1, A cosmetic composition for hair, wherein the above-mentioned reducing agent is an inorganic reducing agent.

7. In Paragraph 6, A cosmetic composition for hair, wherein the above-mentioned inorganic reducing agent is one or more selected from the group consisting of sodium sulfate (Na2SO4), sodium sulfite (Na2SO3), sodium bisulfite (NaHSO3), sodium metabisulfite (Na2S2O5), ammonium bissulfite ((NH4)HSO3), ammonium sulfite ((NH4)2SO3), potassium metabisulfite (K2S2O5), potassium sulfite (K2SO3), potassium bisulfite (KHSO3), hydrogen sulfide (H2S), sodium sulfide (Na2S), sodium dithionite (Na2S2O4), sodium hydride (NaH), and potassium hydride (KH).

8. In Paragraph 1, A cosmetic composition for hair, wherein the above-mentioned reducing agent is an organic reducing agent.

9. In Paragraph 8, A cosmetic composition for hair, wherein the above-mentioned organic reducing agent is one or more selected from the group consisting of thiosulfate, thioglycolic acid, thiolactic acid, ammonium thioglycolate, thioglycerol, thiomaric acid, 2-mercaptopropionic acid, 3-mercaptopropionic acid, 2,3-dimercaptosuccinic acid, thiodiglycol, 2-mercaptoethanol, dithiothreitol, thioxanthin, thiosalicylic acid, thiopropionic acid, lipoic acid, cysteine, N-acetylcysteine, cysteamine, cysteine ​​hydrochloride, homocystine, and glutathione.

10. In Paragraph 1, A cosmetic composition for hair, wherein the size of the nanoparticles is 20 to 2000 nm.

11. In any one of paragraphs 1 through 10, The above-mentioned cosmetic composition for hair is characterized by being formulated as a hair shampoo, hair rinse, hair dye pen, hair tonic, hair conditioner, hair essence, hair lotion, hair treatment, hair cream, hair wax, hair pack, hair oil, hair drying agent, hair preservative, hair dye, hair wave agent, hair bleaching agent, hair gel, hair glaze, hair lacquer, hair moisturizer, hair mousse, or hair spray.

12. In Paragraph 11, The above-mentioned cosmetic composition for hair is formulated as a hair shampoo, and The above hair cosmetic composition further comprises a shampoo base.

13. In Paragraph 12, A cosmetic composition for hair, wherein the shampoo base comprises one or more selected from the group consisting of purified water, sodium C14-16 olefin sulfonate, cocamidopropyl betaine, glycerin, sodium chloride, guar hydroxypropyl trimonium chloride, sodium benzoate, polyquaternium-10, dexpanthenol, polyquaternium-7, citric acid, disodium EDTA, menthol, salicylic acid, butylene glycol, 1,2-hexanediol, and sodium hyaluronate.

14. In Paragraph 12, A cosmetic composition for hair, wherein the shampoo base is included in an amount of 10 to 100 parts by weight based on 1 part by weight of the solvent.

15. In Paragraph 12, The above polyphenol is tannic acid, gallic acid, or a combination thereof, and The above tannic acid is included in an amount of 0.001 to 1 weight part based on 1 weight part of the solvent, and The gallic acid is included in an amount of 0.001 to 0.1 parts by weight based on 1 part by weight of the solvent, and A cosmetic composition for hair, wherein the reducing agent is included in an amount of 0.01 to 5 parts by weight based on 1 part by weight of the solvent.

Images