Hair coating composition and cosmetic composition comprising same

Abstract

The present invention provides a hair coating composition comprising: a first polyphenol including at least two among tannic acid, gallic acid, and caffeic acid; and a second polyphenol comprising at least one selected from the group consisting of a biphenyl moiety, dopamine, catechin, anthocyanin, resveratrol, quercetin, protocatechuic acid, p-hydroxybenzoic acid, vanillic acid, ferulic acid, luteolinidin, apigeninidin, and thureolin, wherein the composition can restore and improve the mechanical strength of hair through a Michael addition reaction with a thiol group included in damaged hair.

Description

Composition for hair coating and cosmetic composition comprising the same

[0001] This application is based upon and claims the benefit of priority from Korean Patent Application No. 10-2024-0031307, filed with the Korean Intellectual Property Office on March 5, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a hair coating composition that can be applied to hair to coat and restore damaged areas, and a cosmetic composition comprising the same.

[0003] Hair is composed of a cuticle, cortex, and medulla, and the characteristics of hair can be determined by the way keratin is bonded in the cortex, which is composed of keratin protein, or the content of sulfur (S) components. The cortex can include a crystalline region containing hard keratin, a fibrous tissue, and an amorphous region containing a matrix containing soft keratin, lipids, polysaccharides, etc. between the fibrous tissues.

[0004] Damage can be defined as the loss or irreversible alteration of the cuticle, cortex, or medulla of the hair, or a specific tissue structure. Hair damage can occur for a variety of reasons. For example, hair can be damaged by physical stimulation such as friction during shampooing, toweling, drying, and combing. Hair can also be damaged by heat such as hair drying, ironing, and perming, which denatures proteins. Hair can also be damaged by chemical factors such as dyeing and bleaching. Hair can also be physically damaged by dust in the air, pollutants, infrared or ultraviolet rays in sunlight, or nutritional imbalances.

[0005] Traditionally, hair damage caused by loss of interstitial substances has been treated with formulations containing fats such as alcohol, glycerides, and paraffin to restore the damage. However, among the types of hair damage, denaturation of the tertiary structure of the proteins that make up the cuticle or cortex, particularly the breakdown of disulfide bonds between keratin proteins, is difficult to restore through simple nutritional supplements or treatments such as shampoos and treatments. This has made it difficult to prevent damaged hair from losing its softness, flexibility, and anti-static properties.

[0006] Therefore, there is a need to develop a composition that can restore hair damage, including hair breakage, by forming bonds between keratin contained in the hair and that can be easily used in daily life.

[0007] The purpose of the present invention is to provide a composition comprising a polyphenol complex that can be coated on the surface of hair to restore damaged hair, and a cosmetic composition comprising the same.

[0008] A hair coating composition according to one aspect of the present invention provides a hair coating composition comprising a first polyphenol of two or more kinds selected from the group consisting of tannic acid, gallic acid, and caffeic acid, and a second polyphenol of one or more kinds selected from the group consisting of a compound of the following chemical formula 1, dopamine, catechin, anthocyanin, resveratrol, quercetin, protocatechuic acid, p-hydroxybenzoic acid, vanillic acid, ferulic acid, luteolinidin, apigenidin, and luteolin:

[0009] [Chemical Formula 1]

[0010]

[0011] Among the foods,

[0012] R1 is hydrogen, hydroxyl or carboxyl group,

[0013] R2 and R3 are independently hydrogen, carboxyl group, C1-C 10Alkyl group, C1-C 10 Haloalkyl group, C1-C 10 Alkoxy group, C1-C 10 It is a haloalkoxy group, an amine group, or a C1-C4 aminoalkyl group.

[0014] The first polyphenol and the second polyphenol may be included in a weight ratio of 1:1 to 20:1.

[0015] The above first polyphenol may be composed of tannic acid, gallic acid, and caffeic acid.

[0016] The tannic acid may be included in an amount of 70 parts by weight or more for 100 parts by weight of the first polyphenol.

[0017] The above first polyphenol may be a complex formed by the tannic acid, gallic acid, and caffeic acid through hydrogen bonding, π stacking, or a combination thereof.

[0018] A cosmetic composition according to one aspect of the present invention may include the hair coating composition described above.

[0019] The above cosmetic composition may be a hair shampoo, hair rinse, hair dye, 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 preservation treatment agent, hair dye, hair waving agent, hair bleaching agent, hair gel, hair glaze, hair lacquer, hair moisturizer, hair mousse, hair spray, hair powder, or hair manicure.

[0020] The above hair coating composition may be included in an amount of 0.1 to 2 wt% based on the total weight of the cosmetic composition.

[0021] The hair coating composition according to the present invention can restore damage including hair breakage and provide smoothness and anti-static effects to hair by inducing bonds between keratins contained in the hair by reacting polyphenol with thiol groups of keratin exposed in damaged hair.

[0022] In addition, the hair coating composition of the present invention can be manufactured in various formulations such as liquid, powder, etc., and a cosmetic composition including the same can be provided as a formulation such as a hair shampoo or hair treatment.

[0023] Figure 1 is an image of the hair coating compositions manufactured in Examples 1 to 4 in Experimental Example 1 after being left for one week.

[0024] Figure 2 shows the appearance of the hair shampoo compositions manufactured in Examples 9 to 15 and Comparative Examples 3 to 4 immediately after manufacturing and after storage for 3 days in Experimental Example 3.

[0025] Figure 3 is a graph showing the tensile strain when a tensile test was performed on hair samples treated with Examples 9 and 16 and Comparative Examples 3 and 4 in Experimental Example 4 using a universal material testing machine.

[0026] Figure 4 is an image showing whether static electricity was generated when a charged rubber balloon was brought near hair samples treated with Examples 9 and 16 and Comparative Examples 3 and 4 in Experimental Example 5.

[0027] Figure 5 is a graph showing the content of thiol groups in each sample based on Comparative Example 3 when the absorbance peak at 412 nm was confirmed using UV-vis for DTNB solutions containing hair samples treated with Examples 9 and 16 and Comparative Examples 3 and 4 in Experimental Example 6.

[0028] Hereinafter, each component of the present invention will be described in more detail so that a person having ordinary skill in the art to which the present invention pertains can easily practice it; however, this is only an example, and the scope of the rights of the present invention is not limited by the following contents.

[0029] The term "comprises" as used herein is used to list materials, compositions, devices, and methods useful in the present invention, but is not limited to the listed examples.

[0030] In the present invention, “hair” refers to a thread-like structure that emerges from the surface of the skin, and encompasses body hair and scalp hair.

[0031] In the present invention, hair damage encompasses splitting and breakage of hair accompanied by exposure of thiol groups derived from keratin contained in the cuticle, cortex, medulla or a combination thereof.

[0032] In the present invention, restoring damaged hair with a hair coating composition or cosmetic composition means reacting the polyphenol contained in the composition with one or more thiol groups exposed to the hair.

[0033]

[0034] A hair coating composition according to one specific example of the present invention comprises a first polyphenol, which is two or more kinds selected from the group consisting of tannic acid, gallic acid, and caffeic acid, and a second polyphenol, which is one or more kinds selected from the group consisting of a compound of the following chemical formula 1, dopamine, catechin, anthocyanin, resveratrol, quercetin, protocatechuic acid, p-hydroxybenzoic acid, vanillic acid, ferulic acid, luteolinidin, apigenidin, and tourmaline:

[0035] [Chemical Formula 1]

[0036]

[0037] Among the foods,

[0038] R1 is hydrogen, hydroxyl or carboxyl group,

[0039] R2 and R3 are independently hydrogen, carboxyl group, C1-C 10 Alkyl group, C1-C 10 Haloalkyl group, C1-C 10 Alkoxy group, C1-C 10 It is a haloalkoxy group, an amine group, or a C1-C4 aminoalkyl group.

[0040] The first polyphenol may be a complex of two or more polyphenols selected from the group consisting of tannic acid, gallic acid, and caffeic acid. Preferably, the first polyphenol may be composed of tannic acid, gallic acid, and caffeic acid, and may be a complex of the three polyphenols. Two or more of the tannic acid, gallic acid, and caffeic acid may form a complex through hydrogen bonding, π stacking, or a combination thereof when mixed. The polyphenol complex may form a coating layer on the hair and simultaneously repair hair damage. For example, the polyphenol complex may form a physical coating layer on the surface of the hair through electrostatic attraction, hydrogen bonding, or a combination thereof, or may chemically bond to a thiol group exposed on the surface of the hair through a Michael addition reaction to form a coating layer. Simultaneously, the polyphenol complex may repair hair damage, including split ends and breakage, by bonding to a thiol group different from the thiol group through a Michael addition reaction.

[0041] The first polyphenol may contain tannic acid in an amount of 70 parts by weight or more, based on 100 parts by weight of the first polyphenol. Specifically, the first polyphenol may contain tannic acid in an amount of 70 parts by weight or more, 75 parts by weight or more, or 80 parts by weight or less, or 75 parts by weight or less, based on 100 parts by weight. Preferably, the tannic acid may be contained in an amount of 70 parts by weight or more and 80 parts by weight or less, based on 100 parts by weight of the first polyphenol. Tannic acid includes a plurality of phenol moieties to provide a space for forming π stacking with at least one of gallic acid and caffeic acid, and may include a plurality of functional groups capable of forming hydrogen bonds to provide a basic structure for forming a complex. The polyphenol complex structure having tannic acid as a basic structure has excellent coating power for hair, and can be used together with the second polyphenol described below to improve hair damage recovery power and improve electrostatic properties of hair. If the above first polyphenol contains less than 70 parts by weight of the tannic acid, the coating power on hair is reduced.

[0042] The second polyphenol may be at least one selected from the group consisting of the compound of the above chemical formula 1, dopamine, catechin, anthocyanin, resveratrol, quercetin, protocatechuic acid, p-hydroxybenzoic acid, vanillic acid, ferulic acid, luteolinidin, apigenidin, luteolin, and trihydroxybenzene. Specifically, the anthocyanin may be at least one compound selected from the group consisting of pelargonidin, petunidin, delphinidin, cyanidin, malvidin, and peonidin.

[0043] Preferably, in the above chemical formula 1, R1 may be hydrogen or a hydroxy group, and R2 and R3 may independently be hydrogen, a carboxyl group, or an amine group. Most preferably, R1 may be hydrogen or a hydroxyl group, and R2 and R3 may be hydrogen.

[0044] The second polyphenol may be coated on the surface of hair like the first polyphenol described above, including a polyphenol moiety, a quinone moiety, or a combination thereof, or may be combined with an exposed thiol group derived from keratin to restore hair damage. In the hair coating composition, the second polyphenol may form a hydrogen bond with the first polyphenol. The second polyphenol may be used together with the first polyphenol to improve the degree of hair damage restoration and improve the tensile strength of the hair. The second polyphenol may exhibit a unique color when forming a coating layer on the surface of the hair.

[0045] The hair coating composition may include the first polyphenol and the second polyphenol in a weight ratio of 1:1 to 20:1. Specifically, the first polyphenol and the second polyphenol may be included in a weight ratio of 1:1, 5:1, 9:1, 10:1, 15:1, 19:1, or 20:1. Preferably, the first polyphenol and the second polyphenol may be included in a weight ratio of 1.9:1 to 19.2:1. If the weight ratio is out of the above range, when a hair coating composition further including a solvent is prepared, the second polyphenol aggregates to form a precipitate, and the hair coating composition in which the precipitate is formed is difficult to apply to hair and cannot form a uniform coating layer on the hair.

[0046] The hair coating composition may be provided in a liquid form that further includes a solvent in addition to the first polyphenol and the second polyphenol, but is not limited thereto. The composition and a cosmetic composition comprising the same may be provided in the form of a powder composed of the first polyphenol and the second polyphenol, and a user may apply the composition to hair by further adding a solvent. The solvent may include water, but is not limited thereto. For example, the solvent may be distilled water, ethanol, a pH buffer solution, a shampoo base, etc., and any solvent that does not cause damage upon contact with the skin or hair and can be used in a cosmetic composition may be used.

[0047] A cosmetic composition according to one specific example of the present invention may include the above hair coating composition.

[0048] The above cosmetic composition can be provided as a hair shampoo, hair rinse, hair dye, 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 preservation treatment agent, hair dye, hair waving agent, hair bleaching agent, hair gel, hair glaze, hair lacquer, hair moisturizer, hair mousse, hair spray or hair powder.

[0049] The cosmetic composition may be used as a single agent or as a mixture of two or more agents. For example, the cosmetic composition may include a hair coating composition, and may be composed of a first agent including the first polyphenol and a second agent including the second polyphenol, and may be stored separately and then used by mixing the first agent and the second agent. Alternatively, the cosmetic composition may include a hair coating composition and a composition according to the formulation of the cosmetic composition. For example, the cosmetic composition may be a hair shampoo including a hair coating composition, and may include a first agent which is a hair coating composition, and a second agent which is a shampoo base composition. Alternatively, the cosmetic composition may be a hair treatment including a hair coating composition, and may include a first agent which is a hair coating composition, and a second agent which is a treatment base composition.

[0050] If the above cosmetic composition is a hair shampoo composition, the shampoo base composition comprises purified water, sodium C 14-16 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, guar hydroxypropyltrimonium chloride, trideceth-6, trideceth-12, ethylhexylglycerin, niacinamide, caprylyl glycol, polyquaternium-10, menthol, citric acid, hydrochloric acid, salicylic acid, maltodextrin, amodimethicone, fragrance, limonene, linalool, hexyl cinnamal, May contain benzyl benzoate, citronellol, eugenol, citral, benzyl alcohol, geraniol, cinnamal, coumarin, and amyl cinnamal.

[0051] When the above cosmetic composition is a hair treatment composition, the treatment base composition may include edelweiss callus culture extract, cetearyl alcohol, glycerin, isopropyl myristate, 1,2-hexanediol, steartrimonium chloride, purified water, PPG-3 caprylyl ether, isoamyl laurate, panthenol, seaweed extract, sea mustard extract, sea mustard extract, laver extract, chlorella vulgaris extract, algae extract, menthol, caprylyl glycol, butylene glycol, hydroxyethyl cellulose, green tea catechin, charcoal powder, isopropyl palmitate, ethylhexylglycerin, tromethamine, propylene glycol, salicylic acid, cetrimonium chloride, and fragrance.

[0052] Based on 100 wt% of the total cosmetic composition, the hair coating composition may be included in an amount of 0.1 to 2 wt%. Specifically, the hair coating composition may be included in an amount of 0.1 wt% or more, 0.2 wt% or more, 0.3 wt% or more, 0.4 wt% or more, 0.5 wt% or more, or 1 wt% or less, 0.5 wt% or less, or 0.4 wt% or less. Preferably, the hair coating composition may be included in an amount of 0.2 wt% or more and 0.5 wt% or less. A cosmetic composition including the hair coating composition within the above content range can be stably stored without occurrence of precipitation.

[0053] One specific example of the present invention relates to a method for coating hair, comprising the step of contacting hair with a hair coating composition according to the preceding specific example. The step of contacting hair with the hair coating composition may be contacting hair with a cosmetic composition comprising the hair coating composition. The step may include, but is not limited to, immersing or immersing hair in the composition, applying the composition to hair using hands or other tools such as a comb, or pouring or spraying the composition onto hair.

[0054] The method for coating hair may further include a step of drying the hair in the air, to which the hair coating composition has been contacted. The step may include, but is not limited to, leaving the hair in the air for 1 to 60 minutes, or drying the hair using a hair dryer for 1 to 5 minutes. Subsequently, the method for coating hair may further include a step of removing the hair coating composition remaining on the hair after the hair drying step by washing it with water. Preferably, the method for coating hair may repeat the step of contacting the hair with the composition and the step of drying the hair in the air at predetermined time intervals.

[0055]

[0056] Hereinafter, the present invention will be described in more detail through specific examples and experimental examples. The following examples and experimental examples are intended to illustrate the present invention, and the present invention is not limited by the following examples and experimental examples.

[0057]

[0058] Examples 1 to 8 and Comparative Examples 1 to 2

[0059] In Examples 1 to 8 and Comparative Example 2, 1 mL of distilled water was added to a reactor exposed to nitrogen at room temperature (25°C), and the first polyphenol was added in the amount (unit: g) shown in Table 1 below, followed by stirring at 100 to 300 rpm at 60°C for 5 minutes. Subsequently, the second polyphenol was added in the amount (unit: g) shown in Table 1 below, and stirred at 100 to 300 rpm for 12 hours at room temperature to prepare a hair coating composition. In Comparative Example 1, 1 mL of distilled water was used.

[0060] Classification 1 Polyphenol (g) 2 Polyphenol (g) Tannic acid Gallic acid Caffeic acid HDPTHB Catechin Malvidin Dopamine Comparative Example 100000000 Comparative Example 20.0750.0200.000600000 Example 10.0750.0200.00060.0050000 Example 20.0750.0200.00060.0100000 Example 30.0750.0200.00060.0500000 Example 40.0750.0200.00060.1000000 Example 50.0750.0200.000600.005000 Example 60.0750.0200.0006000.00500Example 70.0750.0200.00060000.0050Example 80.0750.0200.000600000.005HDP: 2,2',4,4',5,5'-hexahydroxybiphenylTHB: 1,2,4-Trihydroxybenzene

[0061]

[0062] Examples 9 to 15 and Comparative Examples 3 to 4

[0063] In Examples 9 to 15 and Comparative Example 4, 1 mL of distilled water was added to a reactor exposed to nitrogen at room temperature, and the first polyphenol was added in the amount (unit: g) shown in Table 2 below, followed by stirring at 100 to 300 rpm at 60°C for 5 minutes. Subsequently, the second polyphenol was added in the amount (unit: g) shown in Table 2 below, and stirred at 100 to 300 rpm for 12 hours at room temperature to prepare a hair coating composition. In Comparative Example 3, 1 mL of distilled water was used.

[0064] Afterwards, purified water and sodium C were added to the above composition. 14 - 16Olefin 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, guar hydroxypropyltrimonium chloride, trideceth-6, trideceth-12, ethylhexylglycerin, niacinamide, caprylyl glycol, polyquaternium-10, menthol, citric acid, hydrochloric acid, salicylic acid, maltodextrin, amodimethicone, fragrance, limonene, linalool, hexyl cinnamal, 30 g of a shampoo base composition containing benzyl benzoate, citronellol, eugenol, citral, benzyl alcohol, geraniol, cinnamal, coumarin, and amyl cinnamal was added and stirred at 50°C and 50 to 100 rpm for 5 minutes to prepare a hair shampoo composition.

[0065] Classification 1 Polyphenol (g) 2 Polyphenol (g) Tannic acid Gallic acid Caffeic acid HDPTHB Catechin Malvidin Dopamine Shampoo base (g) Comparative example 30000000030 Comparative example 40.0750.0200.000600000 Example 90.0750.0200.00060.0050000 Example 100.0750.0200.00060.0100000 Example 110.0750.0200.00060.0500000 Example 120.0750.0200.000600.005000 Example 130.0750.0200.0006000.00500 Example 140.0750.0200.00060000.0050Example 150.0750.0200.000600000.005HDP: 2,2',4,4',5,5'-hexahydroxybiphenylTHB: 1,2,4-Trihydroxybenzene

[0066]

[0067] Example 16

[0068] In Example 16, 1 mL of distilled water was added to a reactor exposed to nitrogen at room temperature, and the first polyphenol was added in the amount (unit: g) shown in Table 3 below, followed by stirring at 100 to 300 rpm at 60°C for 5 minutes. Subsequently, the second polyphenol was added in the amount (unit: g) shown in Table 3 below, and stirred at 100 to 300 rpm for 12 hours at room temperature to prepare a hair coating composition.

[0069] Afterwards, 30 g of a treatment base composition containing edelweiss callus culture extract, cetearyl alcohol, glycerin, isopropyl myristate, 1,2-hexanediol, steartrimonium chloride, purified water, PPG-3 caprylyl ether, isoamyl laurate, panthenol, seaweed extract, sea mustard extract, sea mustard extract, flat laver extract, chlorella vulgaris extract, algae extract, menthol, caprylyl glycol, butylene glycol, hydroxyethyl cellulose, green tea catechin, charcoal powder, isopropyl palmitate, ethylhexylglycerin, tromethamine, propylene glycol, salicylic acid, cetrimonium chloride, and fragrance was further added to the composition, and the mixture was stirred at 50°C for 5 minutes at 50 to 100 rpm. A hair treatment composition was prepared by stirring.

[0070] Classification 1 Polyphenol (g) 2 Polyphenol (g) Tannic acid Gallic acid Caffeic acid HDP THB Catechin Malvidin Dopamine Treatment base (g) Example 160.0750.0200.00060.005000030 HDP: 2,2',4,4',5,5'-hexahydroxybiphenyl THB: 1,2,4-Trihydroxybenzene

[0071]

[0072] Experimental Example 1. Stability Confirmation of Hair Coating Composition

[0073] Examples 1 to 8 and Comparative Examples 1 to 2 were each injected into a test tube at 1 mL, sealed, and stored at room temperature for 1 week, while the stability of each composition was visually confirmed. As shown in Fig. 1, precipitation was observed in the hair coating composition of Example 4, which had a higher HDP content than Examples 1 to 3.

[0074]

[0075] Experimental Example 2. Evaluation of the Conductivity of a Hair Coating Composition

[0076] A silicon wafer substrate was immersed in the samples of Examples 1 to 3, 5 to 8 and Comparative Examples 1 to 2 at room temperature, and left for 12 hours to dip-coat the wafer substrate with the respective sample composition. The wafer substrate was washed with distilled water and dried to obtain a wafer substrate having a coating layer formed with each sample composition.

[0077] The surface resistance of the coating layer formed with each composition was measured on each wafer substrate using a source meter (Keithley, 2450) at a bias voltage of 1 V. The resistance was measured three times for each sample, and the average value is shown in Table 4 below.

[0078] Discrete resistance (MΩ / cm) 2 ) Comparative Example 140.1 Comparative Example 24.50 Example 13.51 Example 23.50 Example 33.48 Example 55.35 Example 63.98 Example 712.6 Example 89.85

[0079]

[0080] Compared to Comparative Example 1, the wafer substrate treated with the hair coating composition according to the example was confirmed to have low surface resistance. From this, it can be expected that the hair coating composition of the example has high conductivity and, when applied to hair, will effectively dissipate static electricity from the hair, thereby exhibiting an excellent antistatic effect on the hair.

[0081]

[0082] Experimental Example 3. Color Verification of Hair Shampoo Composition

[0083] The hair shampoo compositions manufactured in Examples 9 to 15 and Comparative Examples 3 to 4 were sealed and stored at room temperature for 3 days to check their stability and color. Figure 2 shows the appearance of each composition before and after storage for 3 days.

[0084] Referring to Fig. 2, immediately after manufacturing, Examples 9 to 13, 15 and Comparative Example 4 exhibited a light brown color, and Example 14 exhibited a purple color. After 3 days, compared to the remaining samples, Examples 12 and 15 exhibited brown color due to oxidation of trihydroxybenzene and dopamine, respectively, and thus the color of the composition also turned brown, confirming that the storage stability was relatively low.

[0085]

[0086] Experimental Example 4. Confirmation of the mechanical strength of hair treated with a hair coating composition.

[0087] Damaged hair samples were each immersed in the compositions of Examples 9 and 16 and Comparative Examples 3 and 4, left for 30 minutes, and then washed with water. The hair samples were naturally dried at room temperature for 1 hour and then completely dried using a dryer.

[0088] A tensile test was performed on the treated damaged hair samples using a universal testing machine (SurTA Extra 1A system, Chemilab Co.). The grip spacing of the universal testing machine was set to 13.5 cm, and the damaged hair samples were placed between them, and then tension was performed at a speed of 10 mm / s. Each measurement was performed three times, and the tensile strain (%) of the damaged hair samples treated in Examples 9 and 16 and Comparative Examples 3 and 4 is shown in Fig. 3.

[0089] Referring to FIG. 3, it was confirmed that the tensile strain of the hair samples treated with Examples 9, 16 and Comparative Example 4 increased from 43.0% to 64.6%, 63.5% and 61.0% compared to the damaged hair sample treated with Comparative Example 3. The damaged hair samples treated with Examples 9 and 16 showed the best tensile strain, confirming that the combined use of the first polyphenol and the second polyphenol coats damaged hair to improve the mechanical strength of the hair.

[0090]

[0091] Experimental Example 5. Evaluation of the antistatic properties of hair treated with a hair coating composition.

[0092] Bleached hair samples were each immersed in the compositions of Examples 9 and 16 and Comparative Examples 3 and 4, left for 30 minutes, and then washed with water. The hair samples were naturally dried at room temperature for 1 hour and then completely dried using a dryer.

[0093] A rubber balloon was filled with air, rubbed three times with a cotton cloth, and placed near each hair sample, and the results are shown in Fig. 4.

[0094] As shown in Fig. 4, it was confirmed that the hair samples treated with Examples 9 and 16 and Comparative Example 4 were provided with antistatic properties compared to the hair sample treated with Comparative Example 3.

[0095]

[0096] Experimental Example 6. Confirmation of the restoration effect of hair treated with a hair coating composition.

[0097] When hair samples were treated using the compositions of examples and comparative examples, the amount of change in the thiol groups contained in the hair samples was confirmed, thereby confirming the effect of the hair coating composition on restoring damaged hair.

[0098] At room temperature, 4 mg of DTNB (5,5'-Dithiobis(2-nitrobenzoic acid)) was dissolved in 1 mL of 2% SDS (sodium dodecyl sulfate) aqueous solution, and 90 μL was diluted in 4.91 mL of 2% SDS (sodium dodecyl sulfate) aqueous solution to prepare a DTNB solution.

[0099] Bleached hair samples were each immersed in the compositions of Examples 9 and 16 and Comparative Examples 3 and 4, left for 30 minutes, and then washed with water. The hair samples were naturally dried at room temperature for 1 hour and then completely dried using a dryer.

[0100] Each hair sample was completely immersed in the DTNB solution and incubated at room temperature for 15 minutes. The absorbance peak at 412 nm of the DTNB solution containing the hair sample was confirmed using UV-vis, and the change (%) in damaged hair (thiol group) in the hair sample was determined, which is shown in Figure 5.

[0101] Referring to Fig. 5, when the thiol group content of the hair sample treated with Comparative Example 3 was set to 100%, the hair samples treated with the compositions of Examples 9, 15, and Comparative Example 4 showed thiol group contents of 31.6%, 27.3%, and 28.1%, respectively, confirming that hair damage due to treatment with the hair coating composition was improved. In particular, it was shown that the hair restoration effect was more excellent when treated with the compositions of Examples 9 and 16.

Claims

1. A first polyphenol comprising two or more kinds selected from the group consisting of tannic acid, gallic acid, and caffeic acid; and A hair coating composition comprising a second polyphenol, which is at least one selected from the group consisting of a compound of the following chemical formula 1, dopamine, catechin, anthocyanin, resveratrol, quercetin, protocatechuic acid, p-hydroxybenzoic acid, vanillic acid, ferulic acid, luteolinidin, apigenidin, and luteolin: [Chemical Formula 1] Among the foods, R1 is hydrogen, hydroxyl or carboxyl group, R2 and R3 are independently hydrogen, carboxyl group, C1-C 10 Alkyl group, C1-C 10 Haloalkyl group, C1-C 10 Alkoxy group, C1-C 10 It is a haloalkoxy group, an amine group, or a C1-C4 aminoalkyl group.

2. In paragraph 1, A hair coating composition, wherein the first polyphenol and the second polyphenol are included in a weight ratio of 1:1 to 20:

1.

3. In paragraph 1, A hair coating composition, wherein the first polyphenol is composed of tannic acid, gallic acid, and caffeic acid.

4. In paragraph 3, A hair coating composition comprising 70 parts by weight or more of the tannic acid relative to 100 parts by weight of the first polyphenol.

5. In paragraph 3, A hair coating composition wherein the first polyphenol is a complex formed by the tannic acid, gallic acid, and caffeic acid through hydrogen bonding, π stacking, or a combination thereof.

6. A cosmetic composition comprising a hair coating composition according to any one of claims 1 to 5.

7. In paragraph 6, The above cosmetic composition is a cosmetic composition that is a hair shampoo, hair rinse, hair dye, 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 preservation treatment agent, hair dye, hair waving agent, hair bleaching agent, hair gel, hair glaze, hair lacquer, hair moisturizer, hair mousse, hair spray, hair powder or hair manicure.

8. In paragraph 6, The above hair coating composition is, A cosmetic composition, which is contained in an amount of 0.1 to 2 wt% based on the total weight of the cosmetic composition.

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