Cosmetic composition for cleansing comprising natural surfactant

Abstract

The present invention relates to a UV-blocking dispersion and a cosmetic composition containing same, wherein, in the UV-blocking dispersion, aggregation between particles is suppressed and dispersion stability is improved, thereby allowing UV-blocking ability to be maximized, and the UV-blocking dispersion can be effectively applied to a UV-blocking cosmetic composition through excellent compatibility with various oils and dispersants.

Description

Cosmetic composition for cleansing containing natural surfactants

[0001] The present invention relates to a solid cosmetic composition for cleansing comprising a natural surfactant.

[0002] The skin is broadly divided into three layers—the epidermis, dermis, and subcutaneous fat tissue—in order from the outside in, and functions to protect the human body from physical and chemical stimuli from the external environment. Among these, the epidermis is divided from the outside in the order of the stratum corneum, stratum granulosum, stratum spinosum, and stratum basale; the cells of the stratum corneum act like bricks, and the intercellular lipids between the keratinocytes act like mortar, forming the skin barrier. The stratum corneum of the epidermis contains approximately 10 to 20 percent water and, as the outermost layer of the body, inhibits water evaporation from the outside while blocking the excessive penetration of external substances. The surface of this stratum corneum is covered by a thin natural protective film formed from sebum from sebaceous glands and sweat from sweat glands, which prevents water evaporation.

[0003] Furthermore, lipids between keratinocytes in the stratum corneum are tightly bound to the cells in the form of a lamellar liquid crystal structure. Skin lipid components consisting of 50% ceramide, 25% cholesterol, and 15% free fatty acids perform the skin's barrier function. Ceramide plays a crucial role in the formation, maintenance, and repair of the skin barrier; imbalances in its content and composition ratio lead to a decline in barrier function and the exacerbation of various skin conditions. While cholesterol present in blood vessels poses a danger to the body, the cholesterol constituting skin lipids is a highly effective component for performing the role of the skin barrier; it possesses strong interparticle cohesion and is produced through self-synthesis within the epidermis. Free fatty acids play an important role in maintaining the pH of the stratum corneum at a slightly acidic level of approximately 0.5 to 5.5. While they are produced within the epidermis itself, free fatty acids generated in other organs are also absorbed by keratinocytes. These free fatty acids play a vital role in maintaining the homeostasis of the barrier function.

[0004] Therefore, since overly strong body washes or facial cleansers can denature the intercellular lipids of the stratum corneum and impair its protective function, there is a need for research on natural plant-based cosmetic ingredients capable of maintaining skin homeostasis.

[0005] The object of the present invention is to provide a cosmetic composition for cleansing that includes a solid natural surfactant and provides a cleansing effect.

[0006] The object of the present invention is to provide a body wash, face wash, shampoo, or hair conditioner comprising the above-described cleansing cosmetic composition.

[0007] In one embodiment of the present invention, a solid surfactant composition may be provided. The solid surfactant composition may include one or more of coconut oil, castor oil, camellia oil, and rice bran oil as active ingredients.

[0008] In one embodiment of the present invention, the solid surfactant composition may further include, as an active ingredient, one or more powders, extracts, or hydrolysates of one or more silkworm-derived materials selected from silkworm larvae, pupae, cocoons, and silk.

[0009] In one embodiment of the present invention, the solid surfactant composition may include an alkali hydroxide. The alkali hydroxide may be potassium hydroxide or sodium hydroxide.

[0010] In one embodiment of the present invention, the solid surfactant composition may include coconut oil, castor oil, and camellia oil.

[0011] In one embodiment of the present invention, the solid surfactant composition may have 10 to 40 weight ratios of castor oil and 10 to 40 weight ratios of camellia oil based on 100 weight ratios of coconut oil.

[0012] In one embodiment of the present invention, the solid surfactant composition may be in the form of a solid powder.

[0013] In one embodiment of the present invention, a cleansing cosmetic composition may be provided. The cleansing cosmetic composition may include the solid surfactant composition.

[0014] In one embodiment of the present invention, the cosmetic composition may further include a first moisturizing nutritional component, a second moisturizing nutritional component, and a foaming and solid-forming component.

[0015] In one embodiment of the present invention, the first moisturizing nutritional component may be one or more selected from the group consisting of coconut oil, jojoba oil, shea butter, white tea (green tea) extract, baobab oil, rosemary extract, myrstic acid, anhydrous ethanol, lauric acid, and stearic acid. The second moisturizing nutritional component may be one or more selected from the group consisting of butylene glycol, hyaluronic acid, sorbitol, natural betaine, vitamin, hexanediol, olive oil, ceramide powder, D-panthenol, dietary sulfur, olive emulsifying wax, soy lecithin, Houttuynia cordata extract, and rosemary water.

[0016] In one embodiment of the present invention, a cosmetic composition may be provided. The cosmetic composition may include one or more selected from the group consisting of sodium cocoyl isethionate, corn starch, sodium bicarbonate, citric acid, tartaric acid, tartaric acid, SLSA, keratin powder, and arginine.

[0017] In one embodiment of the present invention, a solid body wash may be provided. The body wash may include the cosmetic composition of claim 1 as an active ingredient.

[0018] In one embodiment of the present invention, a solid face wash may be provided. The face wash may include the cosmetic composition as an active ingredient.

[0019] In one embodiment of the present invention, a solid shampoo may be provided. The shampoo may include the cosmetic composition as an active ingredient.

[0020] In one embodiment of the present disclosure, a solid hair conditioner may be provided. The hair conditioner may include the cosmetic composition as an active ingredient.

[0021] The present invention relates to a cosmetic composition for cleaning that includes natural surfactants. By using solid surfactants including coconut oil, castor oil, and camellia oil to manufacture various solid cleaning agents, the volume can be reduced by more than one-third compared to existing liquid cleaning agents while maintaining the same cleaning power, thereby simultaneously ensuring portability, competitiveness, and eco-friendliness.

[0022] Figure 1 is an image of a solid cosmetic composition prepared according to one embodiment of the present invention.

[0023] Figure 2 is an image showing the scalp exfoliation improvement effect of a solid shampoo manufactured according to one embodiment of the present invention.

[0024] Figure 3 is an image showing the ultrafine dust cleaning power of a solid shampoo manufactured according to one embodiment of the present invention on the scalp and hair.

[0025] Figure 4 is a scanning electron microscope image showing the cuticle condition of the hair after using a solid hair conditioner prepared according to one embodiment of the present invention on the hair.

[0026] Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0027] Throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members or elements interposed between them. Furthermore, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0028] The present invention will be described in detail below with reference to the attached drawings.

[0029]

[0030] The present invention may provide a solid surfactant composition comprising, as an active ingredient; coconut oil; and one or more of castor oil, camellia oil, and rice bran oil. Preferably, the solid surfactant composition may include coconut oil, castor oil, and camellia oil.

[0031] The above solid surfactant composition may have a weight ratio of 10 to 40 parts castor oil and a weight ratio of 10 to 40 parts camellia oil based on 100 parts coconut oil.

[0032] Coconut oil can provide a balance of mechanical hardness and feel as a primary source of saturated fatty acids in solid cleansing cosmetic compositions.

[0033] Since coconut oil has a composition with a high proportion of medium-chain triglycerides (MCTs), it solidifies easily at room temperature and can gently melt and diffuse at skin temperature when used.

[0034] Coconut oil is rich in lauric acid-based triglycerides, so it can provide excellent foam-forming and cleaning power during surfactant activation processes such as saponification or isethionation.

[0035] Coconut oil provides C12-C14 chains including myristic acid, so it can advantageously improve foaming volume and cleaning speed compared to long-chain saturated fatty acids mainly consisting of stearic acid and palmitic acid.

[0036] Coconut oil leaves relatively less residue and a waxy film after washing compared to oils whose main component is long-chain saturated fatty acids, so it can improve rinsability and freshness.

[0037] Coconut oil can simultaneously improve the initial formation and duration of foam when used in combination with surfactant powders (SCI, isethionates, etc.) or naturally derived cationic conditioning agents.

[0038] Since castor oil contains ricinoleic acid as its main component, it can simultaneously provide high viscosity and hydrophilic functional groups.

[0039] Castor oil can improve adhesion and coating properties to interfaces due to its ricinoleic acid structure containing hydroxyl groups.

[0040] Castor oil provides moisture retention, which can alleviate hair breakage and dryness after washing.

[0041] Castor oil can support emulsion stability and inhibit the separation of the oil and water phases during the solidification process.

[0042] Castor oil provides high viscoelasticity, which can mitigate the wear rate of solid bars and extend their service life.

[0043] The hydroxyl groups of castor oil can form hydrogen bonds with fatty acids and fatty alcohols to reinforce the gel strength of the coconut oil crystal network.

[0044] Since camellia oil contains oleic acid as its main component, it can provide both a light lubricating sensation and rapid absorption.

[0045] Camellia oil has a relatively low linolenic acid content, so it may have superior oxidative stability compared to other unsaturated oils.

[0046] Camellia oil provides lipid-based antioxidant components such as squalene and tocopherols, which can inhibit odor and discoloration during storage.

[0047] Camellia oil can reduce scalp irritation by maintaining oil balance without excessive degreasing during the cleansing step.

[0048] Rice bran oil contains a balanced amount of oleic acid and linoleic acid, so it can provide a smooth feel and appropriate fluidity.

[0049] Rice bran oil contains γ-oryzanol and phytosterols, so it can provide both skin barrier support and antioxidant effects.

[0050] Camellia oil and rice bran oil can control viscosity and form a rheological buffer layer, thereby inhibiting cracking of coconut oil-based surfactants.

[0051] Castor oil, camellia oil, and rice bran oil have relatively superior oxidative stability compared to cyclone / cyclone-based oils such as linseed oil and grapeseed oil, so they may be advantageous in terms of storage stability.

[0052] Castor oil, camellia oil, and rice bran oil can provide excellent lightness and slipperiness by improving the spreadability and diffusion of formulations due to their low melting point and low viscosity characteristics compared to saturated fatty acids.

[0053] Castor oil, camellia oil, and rice bran oil can improve the solubility and dispersibility of fragrances, fat-soluble vitamins, and antioxidants relative to saturated fatty acids, thereby promoting the uniform application of ingredients and the expression of their functions.

[0054] Castor oil, camellia oil, and rice bran oil can reduce the heaviness and waxiness of the residue film compared to saturated fatty acids, thereby improving rinsing and freshness.

[0055] A mixture of coconut oil, castor oil, camellia oil, and rice bran oil can extend the solidification temperature range and reduce blooming and oil bleed phenomena, thereby improving production yield and appearance stability.

[0056] A mixture of coconut oil, castor oil, camellia oil, and rice bran oil can suppress breakage at low temperatures under the same hardness conditions and mitigate crushing at high temperatures, thereby improving storage and transportation stability.

[0057] A mixture of coconut oil, castor oil, camellia oil, and rice bran oil provides a balance of cleansing power and conditioning, ensuring both moisture and rinsability after cleansing.

[0058] A mixture of coconut oil, castor oil, camellia oil, and rice bran oil, when used with fatty alcohols and waxes, can expand the freedom to control hardness, thereby enabling the production of solid products in various forms.

[0059] Castor oil, camellia oil, and rice bran oil have a high proportion of unsaturated fatty acids, so it is relatively difficult to solidify them at room temperature when manufacturing surfactants using them alone. However, since coconut oil is rich in saturated fatty acids (especially lauric acid and myristic acid), a mixed system with coconut oil can rapidly form a β′-type microcrystalline network at room temperature and physically maintain and capture the unsaturated oil phase. This crystallographic behavior allows for the formation of a continuous solid network (percolation) even at low solid fat content (SFC), and as a result, the mixed system can achieve solidification more easily than when using other saturated fatty acid-containing oils.

[0060] The above solid surfactant composition may further include, as an active ingredient, one or more powders, extracts, or hydrolysates of one or more silkworm-derived materials selected from silkworm larvae, pupae, cocoons, and silk.

[0061] Since silkworm-derived materials contain silk proteins (sericin / fibroin) and chitin / chitosan derivatives, they can impart conditioning, moisturizing, and film-forming effects to solid surfactant compositions. Sericin hydrolysate provides numerous hydrophilic functional groups (―OH, ―COOH, ―NH2), thereby simultaneously improving moisture-trapping ability and foam fineness during the washing process. Fibroin hydrolysate provides a low-molecular-weight peptide composition with a high glycine / alanine / serine ratio, thereby improving the slip and lubricity of the hair after washing. Chitosan or its salts exhibit cationic properties in the weakly acidic pH range, so they can electrostatically interact with anionic surfactant residues to induce cuticle alignment and electrostatic inhibition.

[0062] Silkworm cocoon-derived powder inhibits bubble drainage through the surface of fine particles, thereby improving the foam persistence and elasticity of the composition.

[0063] Since silkworm-derived substances have excellent compatibility with unsaturated oils (camellia oil, rice bran oil, etc.), they can improve oil phase dispersion stability and the homogeneity of the formulation.

[0064] Since silkworm-derived materials work complementarily with the lauric acid crystal network provided by coconut oil, they can simultaneously improve the structural strength and chipping resistance of solid bars.

[0065] Since silkworm-derived substances form a buffer layer in a mixture of coconut oil and unsaturated oil, they can reduce blooming and oil bleed phenomena after thermal shock.

[0066] Since silkworm-derived substances possess a protein-based surfactant-assisting action, they can improve initial foam formation and re-foaming properties compared to the same surfactant content.

[0067] The particle size of the silkworm-derived material can be set in the range of 20 μm to 200 μm, and the above range can reduce the occurrence of cracks in the molded body while suppressing roughness of the feel.

[0068] Silkworm-derived substances inhibit moisture evaporation through the residual film after washing, thereby maintaining a balance between cleansing power and moisturizing sensation.

[0069] Since silkworm-derived materials work synergistically with a combination of coconut oil, castor oil, camellia oil, and rice bran oil, process stability and appearance quality during solidification can be simultaneously secured.

[0070] The above solid surfactant composition may include an alkali hydroxide. Preferably, the alkali hydroxide may be potassium hydroxide or sodium hydroxide, and more preferably, potassium hydroxide.

[0071] Potassium hydroxide neutralizes fatty acids such as lauric acid, myristic acid, and stearic acid to form potassium fatty acid salts, and the potassium fatty acid salts have high water solubility, which can improve initial foam formation and re-foaming during the cleaning step.

[0072] Potassium hydroxide induces faster dissolution / dispersion and uniform neutralization compared to sodium hydroxide in the same fatty acid system, and these characteristics can contribute to reducing process time and ensuring reproducibility between batches.

[0073] Potassium laurate / potassium myristate formed from potassium hydroxide has excellent wettability and diffusivity in water, and these characteristics can contribute to the micronization of foam and improvement of cleaning speed when used.

[0074] Potassium hydroxide helps emulsify and disperse unsaturated fatty acids derived from castor oil / camellia oil / rice bran oil without rapid increase in viscosity when neutralizing them, and the above characteristics can contribute to bubble trapping control and improvement of surface smoothness.

[0075] Potassium fatty acid salts formed by potassium hydroxide impart optical homogeneity to transparent and translucent solid cleaning bars, and the above characteristics can reduce the color pattern phenomenon of pigment and fragrance dispersion.

[0076] The application of potassium hydroxide enables precise pH fine-tuning, thereby maintaining a stable pH range in formulations containing protein-based functional ingredients and suppressing the increase in sensitization.

[0077] Potassium hydroxide simultaneously activates the saturated fatty acid-based structuring effect of coconut oil and the texture-improving effect of unsaturated oil, and can improve both solidification and texture.

[0078] The present invention may provide a cleansing cosmetic composition comprising the above-described solid surfactant composition. Preferably, the cosmetic composition may be in a solid form.

[0079] Solid surfactant compositions have lower water activity compared to liquids, so they can significantly reduce the risk of microbial growth.

[0080] Solid surfactant compositions can reduce the amount of solvents / preservatives used, thereby alleviating skin irritation and regulatory burdens.

[0081] Solid surfactant compositions can improve logistics stability because they do not cause leakage or container expansion problems during transportation or storage.

[0082] Since solid surfactant compositions do not contain moisture, component degradation such as hydrolysis / oxidation can be delayed compared to liquid phases.

[0083] Since the solid surfactant composition allows for precise weight weighing between batches, it is possible to simultaneously reduce cost and quality variations.

[0084] The solid surfactant composition can maintain its appearance quality even after long-term storage because it is free from physical instability such as phase separation or turbidity.

[0085] Solid surfactant compositions are suitable for low-moisture processes such as direct compression, tableting, and extrusion, thereby saving manufacturing energy and time.

[0086] Since the solid surfactant composition can be mixed at low temperatures without overheating, the stability of heat-sensitive proteins, vitamins, and fragrances can be ensured.

[0087] The solid surfactant composition can improve initial bubble formation and the cleaning initiation speed by rapidly dissolving upon contact with water immediately before use when necessary.

[0088] Solid surfactant compositions provide various process flexibility, such as powder filling, injection molding, and coin compression molding, so the expandability of product shapes can be increased.

[0089] Since the solid surfactant composition removes water content, the product mass and volume can be reduced compared to the same function, and transportation carbon emissions can be reduced.

[0090] The solid surfactant composition facilitates dry mixing with alkali / organic acid powders, thereby improving the reproducibility of pH fine-tuning.

[0091] Since the solid surfactant composition can maintain a high effective content of surfactant, it can improve cleaning efficiency compared to the same input amount.

[0092] The solid surfactant composition can achieve simplification of the entire composition by omitting viscosity modifiers and solubilizing agents required in the liquid phase.

[0093] The above cosmetic composition may further include a first moisturizing nutritional component; a second moisturizing nutritional component; and a foaming and solid-forming component.

[0094] The first moisturizing nourishing ingredient may be one or more selected from the group consisting of coconut oil, jojoba oil, shea butter, white tea (green tea) extract, baobab oil, rosemary extract, myrstic acid, anhydrous ethanol, lauric acid, and stearic acid, but is not limited thereto.

[0095] Coconut oil can provide a basic moisturizing barrier and a lubricating sensation during use through medium-chain fatty acids.

[0096] Jojoba oil can inhibit moisture evaporation by forming a sebum-like protective film through its wax ester structure.

[0097] Shea butter can provide a viscoelastic coating through stearic acid and oleic acid and soothe rough skin texture.

[0098] White tea (green tea) extract can reduce oxidative stress and stabilize skin tone after cleansing through catechin-based antioxidants.

[0099] Baobab oil provides flexibility through unsaturated fatty acids and phytosterols and can maintain moisture for a long time in dry environments.

[0100] Rosemary extract can improve the oxidative stability of the formulation and the skin's cooling sensation through antioxidant and preservative auxiliary ingredients such as rosmarinic acid.

[0101] Myrstic acid can increase the hardness and initial foam stability of solid formulations by contributing to structuring and viscosity formation.

[0102] Anhydrous ethanol can assist in the dissolution and uniform dispersion of fat-soluble components, thereby improving processability and shortening drying time.

[0103] Lauric acid reacts with surfactant ingredients to ensure cleaning power and foam-forming ability, and can balance the residue after cleaning.

[0104] Stearic acid can stabilize the solid structure through a crystal network and control the rate of wear during use.

[0105] The second moisturizing nutritional ingredient may be one or more selected from the group consisting of butylene glycol, hyaluronic acid, sorbitol, natural betaine, vitamin, hexanediol, olive oil, ceramide powder, D-panthenol, dietary sulfur, olive emulsifying wax, soy lecithin, Houttuynia cordata extract, and rosemary water, but is not limited thereto.

[0106] Butylene glycol can increase the dispersion stability of aqueous components through its moisturizing action of adsorbing and retaining moisture and its solubility-assisting function.

[0107] Hyaluronic acid forms a high-molecular-weight hydration film, which inhibits moisture loss from the skin after cleansing and can maintain hydration for a long time.

[0108] Sorbitol can regulate water activity and impart viscoelasticity through the hydrophilicity of polyalcohols, thereby making the user experience smooth.

[0109] Natural betaine can improve the texture and combability of the skin and hair by providing both osmotic protection and static electricity relief effects.

[0110] Vitamin ingredients can stabilize skin condition after cleansing through functional actions such as antioxidant effects, support for the skin barrier, and improvement of skin tone.

[0111] Hexanediol (1,2-hexanediol) can enhance the microbiological stability of the formulation by acting as a preservation booster along with moisturizing.

[0112] Olive oil can alleviate tightness caused by dryness by providing a flexible coating sensation through lipids such as oleic acid and squalene.

[0113] Ceramide powder can compensate for lipid deficiencies in the skin barrier by reinforcing the lamellar structure and reduce roughness after cleansing.

[0114] D-panthenol (provitamin B5) can promote recovery after irritation by providing both moisture-binding ability and a soothing effect.

[0115] Dietary sulfur (MSM) can improve hair elasticity and shine by assisting keratin bonding as a sulfur donor.

[0116] Olive emulsifying wax provides an emulsification system having hydrophilic and lipophilic domains, which can achieve fine dispersion of oil phase components and formulation stabilization.

[0117] Soy lecithin is a phospholipid-based surfactant that forms a lamellar moisturizing film, enabling it to simultaneously retain moisture and provide flexibility.

[0118] Houttuynia cordata extract can alleviate sensitivity and oil imbalance after cleansing through its soothing and sebum-balancing effects.

[0119] Rosemary water can refresh the skin with the mild astringent and antioxidant properties of herbal distilled water and complement the fragrance profile of the formulation.

[0120] The above foaming and solid-forming components may be one or more selected from the group consisting of sodium cocoyl isethionate, corn starch, sodium bicarbonate, citric acid, tartaric acid, slate, SLSA, keratin powder, and arginine, but are not limited thereto.

[0121] Sodium cocoyl isethionate can provide rich, fine foam and excellent cleaning initiation through its mild anionic surfactant properties.

[0122] Corn starch can improve the fluidity of the powder through moisture adsorption and viscosity formation, and reinforce the mechanical stability of the compressed molded body.

[0123] Sodium bicarbonate reacts with organic acids to generate carbon dioxide, which can enhance initial foaming and re-foaming properties during use.

[0124] Citric acid can regulate acid-base reactions to stabilize foaming speed and pH, and maintain a balance of texture and shelf life in the formulation.

[0125] Tartaric acid is a divalent organic acid that provides buffering capacity, which can slow down the foaming reaction and improve the uniformity of the solidification process.

[0126] Tin nitrate (mica) is a plate-shaped inorganic filler that imparts slipperiness and anti-caking effects, and can improve surface smoothness and wear resistance after compression.

[0127] SLSA (sodium lauryl sulfoacetate) provides low-irritation, high-foaming properties, forming fine and elastic foam, and can simultaneously ensure cleaning power and rinsing ability.

[0128] Keratin powder can support the slipperiness and elasticity of hair by forming a protein film and improve the uniformity of wear on solid bars.

[0129] As a basic amino acid, arginine can simultaneously perform pH fine-tuning and electrostatic relief, and enhance compatibility with proteins and surfactant components.

[0130] The present invention can provide a body wash comprising a cosmetic composition as an active ingredient.

[0131] The present invention can provide a face wash comprising a cosmetic composition as an active ingredient.

[0132] The present invention can provide a shampoo comprising a cosmetic composition as an active ingredient.

[0133] Body wash, face wash, and shampoo contain natural surfactants as active ingredients, enabling low-irritation cleansing for sensitive skin.

[0134] Body wash, face wash, and shampoo are based on solid powder compositions, so they have low water activity, which can improve microbiological stability.

[0135] Body wash, face wash, and shampoo can simultaneously provide rich, fine lather and a soft feel through the synergy of coconut oil and unsaturated oils.

[0136] Body wash, face wash, and shampoo can be molded into solid coin, stick, or bar forms, providing consistency in single-use amounts and convenience of portability.

[0137] Body wash, face wash, and shampoo can optimize the balance of rinsability, shine, and slipperiness by applying a potassium hydroxide-based partial saponification system.

[0138] Body washes, face washes, and shampoos can improve quality consistency by reducing the risk of leakage and viscosity drift throughout the entire manufacturing and distribution lifecycle.

[0139] The present invention can provide a hair conditioner comprising a cosmetic composition as an active ingredient.

[0140] Since the hair conditioner contains natural surfactants as active ingredients, it can achieve a conditioning effect under low-irritation conditions.

[0141] Since the hair conditioner utilizes a solid powder-based formulation, it has low water activity, allowing for the simultaneous assurance of microbiological stability and storage convenience.

[0142] The hair conditioner utilizes a combination of coconut oil, castor oil, camellia oil, and rice bran oil, allowing it to simultaneously enhance softness and shine formation.

[0143] Hair conditioners are suitable for powder filling or compression molding processes, so production efficiency and quality reproducibility between batches can be ensured.

[0144] Hair conditioners can achieve ingredient simplification and regulatory compatibility by reducing the use of solvents and preservatives through low-moisture and anhydrous process characteristics.

[0145] The hair conditioner can improve regional user satisfaction by minimizing residue and stickiness in both hard and soft water environments.

[0146] Hereinafter, the present invention will be described in detail with reference to examples to aid in understanding. However, the following examples are merely illustrative of the content of the present invention and the scope of the present invention is not limited to the following examples. The examples of the present invention are provided to more completely explain the present invention to those with average knowledge in the art.

[0147]

[0148] [Preparation Example 1] Preparation of natural surfactant (1)

[0149] To prepare the natural surfactant, a first mixture was prepared by mixing 470 g of coconut oil, 98 g of camellia oil, and 100 g of castor oil in a water bath at 75°C. A second mixture was prepared by mixing 178 g of caustic potash and 178 g of purified water, adding 0.6 g of silkworm cocoon balls, and mixing at 75°C. Subsequently, the first mixture and the second mixture were vigorously stirred at 75°C to induce a saponification reaction, thereby preparing a third mixture. Next, the third mixture was homogenized by allowing it to stand and be kept warm at 70°C for 15 minutes. The homogenized third mixture was placed in salt water and boiled, and then filtered through a sieve to remove moisture and glycerin, thereby producing a natural surfactant in solid form. Finally, the natural surfactant was ground in a grinder to produce a powder.

[0150]

[0151] [Preparation Example 2] Preparation of natural surfactant (2)

[0152] As another example of preparing a natural surfactant, 500 g of coconut oil, 100 g of camellia oil, and 100 g of castor oil were mixed in a water bath at 75°C to prepare a first mixture, 178 g of caustic potash and 178 g of purified water were mixed, and 2 g of silkworm cocoon balls were added and mixed at 75°C to prepare a second mixture. Afterwards, the process was carried out in the same manner as in Preparation Example 1 above, and a natural surfactant in powder form was prepared.

[0153]

[0154] [Preparation Example 3] Preparation of solid body wash

[0155] As a method for manufacturing a solid body wash, first, 50 g of natural surfactant powder prepared according to Manufacturing Example 1 or Manufacturing Example 2, 6 g of coconut oil, 6 g of white tea (green tea) extract, 10 g of anhydrous ethanol, and 2.6 g of baobab oil were mixed, 2.6 g of myrstic acid and 5.7 g of lauric acid were added, and the mixture was heated in a water bath at a temperature of 70 ℃ for 10 minutes to prepare the 4-1 mixture, and 3 g of butylene glycol, 1.6 g of hyaluronic acid, 5 g of sorbitol, 2.2 g of natural betaine, 1 g of vitamin, 2.7 g of olive oil, 0.5 g of ceramide powder, 3 g of D-panthenol, 5 g of dietary sulfur, 3 g of olive emulsifying wax, and 3 g of soy lecipin were mixed at 70 ℃ until all the powders were melted to prepare the 5-1 mixture. Mixture 4-1 and Mixture 5-1 were thoroughly mixed, and 0.4 g of fragrance and coloring were added to prepare Mixture 6-1. Subsequently, 300 g of sodium cocoyl isethionate, 105 g of corn starch, 7 g of citric acid, 5 g of tartaric acid, 5 g of nitrate, 40 g of sodium bicarbonate, and 20 g of SLSA were further mixed into Mixture 6-1 and ground in a grinder to produce fine body wash powder. Finally, the ground body wash powder was placed in a press and compressed to produce coin-shaped solid body wash (Fig. 1).

[0156]

[0157] [Preparation Example 4] Preparation of solid face wash

[0158] As a method for manufacturing a solid face wash, first, 50 g of natural surfactant powder prepared according to Preparation Example 1 or Preparation Example 2, 5.5 g of coconut oil, 2.7 g of jojoba oil, 11.5 g of white tea (green tea) extract, 5 g of rosemary extract, 10 g of anhydrous ethanol, and 2.7 g of baobab oil are mixed, 2.5 g of myrstic acid is added, and the mixture is heated in a water bath at 70°C for 10 minutes to prepare Mixture 4-2, and 2 g of butylene glycol, 1.6 g of hyaluronic acid, 5 g of sorbitol, 2.2 g of natural betaine, 1 g of vitamin C, 1 g of hexanediol, 2.7 g of olive oil, 0.65 g of ceramide powder, 1 g of D-panthenol, 6 g of dietary sulfur, 3 g of olive emulsifying wax, and 3.5 g of soy lecipin are added to 70 Mixture 5-2 was prepared by mixing at ℃ until all the powders melted. Mixture 4-2 and Mixture 5-2 were thoroughly mixed, and then 0.2 g of fragrance and coloring were added to prepare Mixture 6-2. Subsequently, 150 g of sodium cocoyl isethionate, 73 g of corn starch, 7 g of citric acid, 6 g of nitrate, 25 g of sodium bicarbonate, and 16 g of SLSA were added to Mixture 6-2 and ground in a grinder to produce fine body wash powder. Afterward, 1 g of the ground body wash powder was placed in a compressor and compressed to produce a coin-shaped solid face wash.

[0159]

[0160] [Preparation Example 5] Preparation of solid shampoo

[0161] As a method for manufacturing solid shampoo, first, 40 g of natural surfactant powder prepared according to Preparation Example 1 or Preparation Example 2 was mixed with oil phase components including 4 g of shea butter, 0.5 g of 1,2-hexanediol, 1 g of ceramide (Ceramide NP or EOP), 10 g of lauric acid, and 5 g of stearic acid, heated in a water bath at a temperature of 70 ℃ to prepare Mixture 4-3, and then mixed with water-soluble components including 1 g of butylene glycol, 0.5 g of Houttuynia cordata extract, and 0.5 g of rosemary water to prepare Mixture 5-3. Mixture 6-3 was prepared by homogeneously mixing 2 g of ethanol into the prepared Mixture 4-3 and Mixture 5-3. Subsequently, 60 g of sodium coco-ithionate, 10 g of corn starch, 10 g of SLSA, 17 g of sodium bicarbonate, 7 g of citric acid, 3 g of tartaric acid, 2 g of tartaric acid, 10 g of natural betaine powder, 1 g of keratin powder, and 3 g of arginine were added to the mixture of 6-3 and mixed, then placed in a grinder and ground to produce fine solid shampoo powder. Finally, 3 g of the ground shampoo powder was placed in a press and compressed to produce coin-shaped solid shampoo.

[0162]

[0163] [Preparation Example 6] Preparation of solid hair conditioner

[0164] For the method of manufacturing a solid hair conditioner, first, 10 g of natural surfactant powder prepared according to Manufacturing Example 1 or Manufacturing Example 2 and 1.5 g of shea butter are weighed, heated in a water bath at 70 ℃, and mixed while stirring to prepare Mixture 4-4, and 1.5 g of a protein extract containing butylene glycol, hydrolyzed soy protein, hydrolyzed extensin, hydrolyzed rice protein, hydrolyzed corn protein, hydrolyzed potato protein, and 1,2-hexanediol, 0.5 g of hexanediol, and macadasoside extract (Centella asiatica extract) Mixture 5-4 was prepared by mixing 1.5 g of and 1 g of marine elastin. Powdered ingredients including 0.3 g of D-panthenol, 0.05 g of ceramide powder, 0.05 g of marine collagen, 1.5 g of keratin powder, and 0.8 g of arginine powder were added to Mixture 5-4 and mixed by uniform stirring. Then, 1.275 g of betaine was added and mixed uniformly to prepare Mixture 5-5. Olive emulsifying wax, an emulsifier, was added to the prepared Mixture 4-4 and Mixture 5-5 and mixed to melt them. Afterward, a colorant and fragrance were added and mixed again to prepare a liquid material for a solid hair conditioner. The prepared liquid material was further mixed with a powder material prepared by mixing 20 g of corn starch, 5.1 g of citric acid, 3 g of nitrate, 7 g of sodium bicarbonate, and 0.8 g of arginine powder, then dried at 28°C for 12 hours and ground in a grinder. Afterward, 2 to 4 g of the ground solid hair conditioner powder was placed in a compressor and compressed to produce coin-shaped solid hair conditioners with a diameter of 2 to 3 cm and thicknesses of 0.5 and 1 cm.

[0165]

[0166] [Example 1] Optimal Preparation of Solid Surfactant

[0167] Oil combinations composed solely of unsaturated fatty acids have limitations in that they fail to form sufficient crystals at room temperature, remaining in a liquid paste state, and causing oil bleed and surface blooming during long-term storage, thereby impairing molding stability and appearance quality. Meanwhile, it was confirmed that when only solidifiable saturated fatty acids are used as the main component, solidification and mechanical strength are secured, but the user experience is heavy, the waxy residue increases, and sensory quality such as slip, gloss, and re-foaming properties deteriorates after cleaning. Therefore, to resolve these conflicting relationships, the inventors identified an optimal oil combination that simultaneously secures the structuring ability of saturated fatty acids and the user experience benefits of unsaturated fatty acids.

[0168] For comparison with Preparation Example 2, Comparative Examples 1-12 were conducted by changing the oil with a high saturated fatty acid content or the oil with a high unsaturated fatty acid content and attempting to prepare it using the same method and volume as Preparation Example 1, and the results are as shown in Table 1 below.

[0169] Oil with high saturated fatty acid content (500g) Oil with high unsaturated fatty acid content (100g + 100g or 200g) Degree of solidification (1~5) Preparation Example 2 Coconut oil, castor oil, camellia oil 5 Comparative Example 1 Coconut oil, castor oil 4 Comparative Example 2 Coconut oil, camellia oil 4 Comparative Example 3 Coconut oil, rice bran oil 1 Comparative Example 4 Coconut oil, castor oil, rice bran oil 4 Comparative Example 5 Coconut oil, camellia oil, rice bran oil 4 Comparative Example 6 Coconut oil, castor oil, sunflower oil 2 Comparative Example 7 Coconut oil, castor oil, grapeseed oil 2 Comparative Example 8 Coconut oil, castor oil, olive oil 1 Comparative Example 9 Coconut oil, castor oil, avocado oil 1 Comparative Example 10 Palm kernel oil, castor oil, Camellia oil 3 Comparative Example 11 Babassu oil Castor oil, Camellia oil 3 Comparative Example 12 Palm oil Castor oil, Camellia oil 2

[0170] *5: Very good, 4: Good, 3: Slow, 2: Very slow, 1: Not good. As a result, in Comparative Examples 1 and 2, when castor oil or camellia oil was used alone in oils with a high content of unsaturated fatty acids, it was confirmed that although solidification occurred, it became a semi-solid state that could be easily pressed by finger pressure. In Comparative Example 3, when only rice bran oil was used in oils with a high content of unsaturated fatty acids, solidification did not occur; however, as in Comparative Examples 4 and 5, it was confirmed that solidification occurred when used together with castor oil or camellia oil. However, in Comparative Examples 6 to 9, it was confirmed that even when other oils with a high content of unsaturated fatty acids were mixed with castor oil, solidification did not occur or occurred more slowly than when castor oil was used alone, thus confirming that the combination of using castor oil and camellia oil together is the optimal combination for solidification.

[0171] In addition, when checking whether solidification occurs using oils with a high saturated fatty acid content other than coconut oil, it was confirmed that solidification is slowed down even when using castor oil and camellia oil, which are used together with coconut oil, according to Comparative Examples 10 to 12.

[0172] In conclusion, it was confirmed that the combination of coconut oil, castor oil, and camellia oil is the optimal combination for solidification compared to combinations of other oils in the optimal preparation of solid surfactants.

[0173]

[0174] [Example 2] Scalp barrier improvement effect according to solid shampoo

[0175] To evaluate the scalp barrier improvement effect of a liquid shampoo prepared by a generally known method with the same content as the solid shampoo prepared as in Preparation Example 5, 20 adults aged 30 to 60 were instructed to use either the solid shampoo (Subjects 1-10) or the liquid shampoo (Subjects 21-30) at least once a day for two weeks. Transepidermal water loss (TEWL) was measured using a Tewemeter™ 300 to assess the scalp condition before and after product use. The Tewemeter measures the concentration change of water evaporation indirectly from the skin using two pairs of sensors (temperature and relative humidity) located inside a cylindrical probe. A higher measurement value indicates greater water loss due to damage to the stratum corneum, while a decrease in the measurement value indicates an improvement in the scalp barrier. The unit of measurement is g / m² 2 It is h.

[0176] As shown in Table 2 below, it was confirmed that the transepidermal water loss of the scalp decreased compared to before use. In subjects who used solid shampoo for 2 weeks (subjects 1-10), the average TEWL decreased from 25.43 to 17.68, a decrease of 30.48%, while in subjects who used liquid shampoo for 2 weeks (subjects 21-30), the average TEWL decreased from 28.05 to 21.17, a decrease of only 24.53%. This confirmed that the results for subjects who used solid shampoo for 2 weeks (subjects 1-10) showed a statistically significant difference (p<0.05). Therefore, it was confirmed that using solid shampoo provides a better effect compared to liquid shampoo for the same dosage.

[0177] Subject (NO.) Use TEWL of the entire scalp (g / m² 2 h) TEWL of the scalp after 2 weeks of use (g / m²) 2h)130.4225.40221.309.76325.5517.49430.7419.53519.4014.47619.4410.47717.125.27828.5120.13936.5531.561021.6418.75Average25.4317.682131 .6129.492225.7320.532322.2815.422429.7419.442527.2425.732627.2717.482734.1529.522833.5127.502933.5021.573021.6312.42Average28.0521.17

[0178] [Example 3] Scalp moisturization improvement effect according to solid shampoo

[0179] To evaluate the scalp moisturizing improvement effect of the solid shampoo prepared as in Example 5, 20 adults aged 30 to 60 were asked to use the solid shampoo at least once a day for 2 weeks, and the moisture content was measured using a Corneometer. The measurement using the Corneometer measures the electrostatic capacitance of the skin through a probe. Since skin moisture content and electrostatic capacitance are proportional to each other, the measured value increases as the moisture content increases, and it was evaluated that scalp moisturization has improved. The measurement unit is the dimensionless unit AU (Arbitrary Unit).

[0180] As shown in Table 3 below, it was confirmed that the moisture content of the subjects' scalps increased after using the solid shampoo for two weeks compared to before use, which showed a statistically significant difference (p<0.05). Furthermore, a comparative analysis of the average scalp moisture content before and after using the solid shampoo for two weeks revealed that the moisturization status improved by 63.5% due to the solid shampoo.

[0181] Subject (NO.) Scalp moisture content before use (AU) Scalp moisture content after 2 weeks of use (AU) 1 13.4 2 0.5 2 6.6 1 0.4 3 7.4 1 1.5 4 6.5 9.6 5 8.3 1 1.5 6 5.3 8.3 7 1 3.8 1 6.5 8 4.1 8.6 9 9.1 17.4 10 1 1.2 2 1.4 11 13.1 17.7 12 9.6 17.7 13 10.5 17.7 14 9.4 16.2 15 1 1.8 15.6 16 7.1 1 1.3 17 4.3 8.4 18 14.4 27.5 19 14.4 19.3 20 10.6 18.8 Average 9.5 5 15.3

[0182] [Example 4] Effect of solid shampoo on improving scalp itching

[0183] To evaluate the scalp itching improvement effect of the solid shampoo prepared as in Example 5, a Visual Analogue Scale (VAS) was administered to 20 adults aged 30 to 60 years who used the solid shampoo at least once a day for two weeks. The Visual Analogue Scale (VAS) measured the degree of itching through each subject's subjective self-assessment of itching, and compared the changes in measured values ​​before product use (Week 0) and after two weeks of product use. The survey evaluation was conducted using a 10-point scale Visual Analogue Scale (VAS), and itching was evaluated as improved as the score for the degree of itching decreased. The evaluation criteria for the Visual Analogue Scale are as shown in Table 4 below.

[0184] Score Severity of Itching No itching 0 points Mild itching 1 point or more but less than 3 points Severe itching 3 points or more but less than 7 points Severe itching 7 points or more but less than 9 points Very severe itching 10 points

[0185] As shown in Table 5 below, it was confirmed that after 2 weeks of using the solid shampoo, scalp itching caused by dryness decreased compared to before use based on the subjects' self-perception criteria, showing a statistically significant difference (p<0.05). In addition, a comparative analysis of the average self-survey scores before and after 2 weeks of using the solid shampoo revealed that the scalp itching condition improved by 43.6% due to the solid shampoo.

[0186] Subject (NO.) Use Before Scalp Itch Self-Assessment (Score) Use After Scalp Itch Self-Assessment (Score) 16 4 29 6 38 6 4 10 7 5 7 4 6 9 4 7 8 38 9 4 9 9 6 10 7 4 11 9 6 12 6 3 13 6 3 14 9 4 15 9 7 16 9 3 17 6 ​​3 18 8 3 19 9 6 20 96 Average 8.1 4.6

[0187] [Example 5] Effect of Solid Shampoo on Scalp Exfoliation Improvement To evaluate the effect of the solid shampoo prepared as in Preparation Example 5 on improving scalp exfoliation, 20 adults aged 30 to 60 years were subjected to a single use of the solid shampoo, and the effect on improving scalp exfoliation was evaluated using image analysis with Visioscan®VC20 plus. The four variables of the measurements derived from the Visioscan®VC20 plus are SEr (Roughness), SEsc (Scaliness), SEsm (Smoothness), and SEw (Wrinkles), and among them, the SEsc (Scaliness) value, which represents the amount of skin exfoliation, was used. A decrease in the SEsc (Scaliness) value indicates a decrease in the amount of scalp exfoliation.

[0188] As shown in Figure 2 and Table 6 below, it was confirmed that the amount of scalp keratin decreased after one use of the solid shampoo compared to before use, indicating that scalp keratin is significantly removed with just a single use. These results showed a statistically significant difference (p<0.05). In addition, a comparative analysis of the average scalp keratin amount before and after one use of the solid shampoo by the subjects revealed that the improvement in scalp keratin by the solid shampoo was 87.5%.

[0189] Subject (NO.) Use Front scalp keratin amount (%) 1 use Back scalp Keratin Mass (%) 117.0 13.8 221 2.8 40.1 431 9.6 57.5 94 16.8 13.7 51 1.4 52.4 96 16.1 42.6 57 24.2 21.8 08 22.9 51.7 39 19.9 92.9 41 02 0.2 91.9 11 5.0 7 4.0 51 21 1.3 01.6 21 324.1 22.2 91 420.2 80.0 81 522.6 30.5 81 621.5 20.2 21 71 7.3 11.7 61 81 5.6 50.3 7 191 8.8 91.0 7 201 7.2 2.6 7 Average 18.2 6 62.1 77

[0190] [Example 6] Scalp exfoliation improvement effect according to solid shampoo

[0191] To evaluate the scalp sebum (oil) improvement effect of the solid shampoo prepared as in Preparation Example 5, 20 adults aged 30 to 60 were subjected to the solid shampoo once, and the scalp sebum improvement effect was analyzed using a Sebumeter. The measurement of the Sebumeter involves absorbing oil using a special translucent lipid-absorbing tape and measuring the transmittance of light passing through the tape after it becomes transparent. The transmittance of light passing through the transparent tape represents the amount of oil, and it was evaluated that scalp sebum (oil) improved as the measured value decreased.

[0192] As shown in Table 7 below, it was confirmed that the amount of sebum on the scalp of the subjects decreased significantly after one use of the solid shampoo compared to before use. These results showed a statistically significant difference (p<0.05). In addition, a comparative analysis of the average values ​​of scalp sebum before and after one use of the solid shampoo of the subjects revealed that the improvement in oiliness of the scalp by the solid shampoo was 85.5%.

[0193] Subject (NO.) Sebum amount on the entire scalp (µg / cm²) 2 ) Amount of sebum on the scalp after a single use (㎍ / cm²) 2 )116136213640313174146405156196150157150128134149132610101251113251215321131275141622315111371614429171681718134301915416201577Average14220.2

[0194] [Example 7] Effect of solid shampoo on cleaning ultrafine dust on the scalp To evaluate the effect of improving the cleaning power of ultrafine dust on the scalp by the solid shampoo prepared as in Example 5, a study was conducted on 20 adults aged 30 to 60 years. Carbon black, which is a mimic of ultrafine dust with a size of 0.03 to 0.20 μm, was applied to the scalp and hair, and the solid shampoo was used once. Images were captured using a high-resolution imaging device KONG Camera (Video Micro Scope, Bomtech) and analyzed using an image program. For the above analysis, images were captured using the high-resolution imaging device before using the solid shampoo, after applying the imitation, and after applying the imitation and using the solid shampoo once. The images were analyzed using the image program to determine the intensity value, and the changes in the intensity value before using the product, after applying the imitation, and after one wash were compared and evaluated. It was assessed that the ultrafine dust imitation was washed as the intensity value increased after washing.

[0195] As shown in Figure 3 and Table 8 below, the lightness values ​​of the subjects' scalps and hair increased after the application of the ultrafine dust mimic and one use of the solid shampoo compared to before the application of the ultrafine dust mimic and the solid shampoo, and the lightness values ​​after the application of the ultrafine dust mimic and one use of the solid shampoo were similar to the lightness values ​​before the application of the ultrafine dust mimic. This indicates that the ultrafine dust mimic is almost completely removed even with just one use of the solid shampoo, suggesting that the solid shampoo exhibits excellent scalp cleansing power. Furthermore, a comparative analysis of the average lightness values ​​before and after one use of the solid shampoo following the application of the ultrafine dust mimic revealed that the cleansing power of the solid shampoo was 98%.

[0196] Subject (NO.) Scalp brightness value before application of ultrafine dust simulant and before use of solid shampoo (AU) Scalp brightness value before application of simulant and before use of solid shampoo (AU) Scalp brightness value after application of simulant and after one use of solid shampoo (AU)1139.2296.77138.782140.9689.16139.753138.6882.44138.584123.7780.23123.215133.8689.66132.856138. 1989.55136.857130.8684.01129.848138.6290.71137.209131.4485.90131.0610135.3188.22133.6411128.8094.20 127.1512139.7385.65137.8313135.0986.41134.2914120.0285.61119.9515136.4589.69134.9416130.9882.92130.7717125.9180.94125.8418136.2185.81135.7819136.1985.75135.7620130.9293.82129.27Average133.56187.373132.667

[0197] [Example 8] Scalp exfoliation improvement effect according to solid shampoo

[0198] To evaluate skin irritation caused by the solid shampoo prepared as in Example 5, irritation was assessed on 30 adults aged 20 to 60 years by applying the solid shampoo to their skin according to the International Contact Dermatitis Group (ICDRG) standards. For the evaluation, the solid shampoo was diluted and applied to a patch. After disinfecting the subjects' backs, the patch was attached for 24 hours and then removed. After 30 minutes and 24 hours, the skin irritation was visually assessed to calculate the Mean Score and classify the degree of irritation.

[0199] When checked at 30 minutes and 24 hours after removing the patch, no adverse skin reactions such as erythema, edema, stinging, or burning were observed in any of the 30 subjects, and the average skin reaction score (Mean Score) was 0.00.

[0200]

[0201] [Example 9] Evaluation of Skin Irritation from Solid Hair Conditioner

[0202] Skin irritation evaluation was performed on the solid hair conditioner prepared as in Preparation Example 6.

[0203] A total of 30 subjects were included in the study. The test site was wiped with 70% ethanol and dried. Then, 20 µl of solid hair conditioner, diluted to 1% with distilled water, was applied to the IQ Ultra chamber and fixed onto the subject's test site. The fixed patch was removed after 24 hours. After removing the patch, the test site was marked with a marking pen, and the presence or absence of irritation at the test site was assessed 30 minutes and 24 hours after removal according to the judgment criteria in Table 9 below. Additionally, the evaluation analysis was performed using the following mathematical formula and the skin patch test result judgment table in Table 10 below.

[0204] Display score (score)ICDRG judgment criteria-0No reaction±0.5Doubtful or questionable reaction+1Slight erythema, either spotty or diffuse+2Moderate uniform erythema+++3Intense redness with edema++++4Intense redness with edema & vesicles

[0205] ICDRG: International Contact Dermatitis Research Group [Mathematical Formula]

[0206]

[0207] Rating Mean Score Slight 0.00 - 0.87 Mild 0.88 - 2.42 Moderate 2.43 - 3.44 Severe 3.45 or higher

[0208] As a result, the skin irritation evaluation results confirmed that there was no skin irritation in all 30 subjects, with a score of 0.

[0209] [Example 10] Evaluation of the hair tangling improvement effect of a solid hair conditioner

[0210] In order to evaluate the superior hair tangling improvement effect of the solid hair conditioner prepared as in Preparation Example 6, a test was conducted to compare the solid hair conditioner prepared as in Preparation Example 6 with a liquid hair conditioner prepared by a generally known method having the same content. Twenty bundles of black human hair were used as test subjects, and hair softness was evaluated by the change in the maximum combing load (N) before and after one use of the solid hair conditioner. The maximum load was measured using a CT-D10 type tensile strength tester. The principle of the tensile strength tester is to determine the characteristics of the test subject by applying an axial tensile load to an object fixed to a jig. The measurement was performed by fixing the human hair and the brush used for measurement to the jig, pulling them on both sides, and measuring the maximum load (N) value when the hair unraveled. It was determined that the softness (tangling) of the hair was maintained as the maximum load value decreased.

[0211] As shown in Tables 11 and 12 below, compared to the group of subjects (1-10) who used the solid hair conditioner once and the group of subjects (21-30) who used the liquid hair conditioner, the reduction rate from before use was 77.1% and 74.1%, respectively, indicating that hair tangling was relieved and the maximum load value decreased further, showing a statistically significant difference (p<0.05). Therefore, it was confirmed that using a solid hair conditioner provides a better effect compared to using a liquid hair conditioner for the same amount.

[0212] Subject (NO.) Maximum hair load before use (N) Maximum hair load after 1 use (N) 1 4 0.25 8 5.5 27 2 29.7 15 10.7 6 3 4 2.18 0 6.7 7 4 3 2.6 6 8 11.9 4 0 5 4 1.5 2 0 7.8 0 26 3 6.8 5 8 7.3 9 7 7 4 5.28 3 10.5 9 18 3 3.9 4 16.8 5 6 9 4 6.7 6 8 12.4 14 10 4 7.2 7 0 12.1 14 Average 3 8.3 0 8.77

[0213] Subject (NO.) Maximum hair load before use (N) Maximum hair load after 1 use (N) 2 1 3 2.2 3 3 1 2.0 1 2 2 3 3.3 0 2 1 0.3 2 4 2 3 3 8.7 7 9 9.1 7 1 2 4 4 1.7 7 8 1 1.6 8 0 2 5 4 6.9 8 2 7.8 0 1 2 6 4 4.9 1 6 10.6 5 1 2 7 3 4.8 5 7 8.5 6 7 2 8 3 6.6 9 2 10.6 8 6 2 9 3 8.4 8 5 10.2 4 5 3 0 4 7.0 2 2 9.8 2 5 Average 3 9.3 1 10.1 9

[0214] [Example 11] Scalp exfoliation improvement effect according to solid shampoo

[0215] The effect of the solid hair conditioner prepared as in Preparation Example 6 on improving damaged hair cuticles was evaluated. Twenty subjects with hair damaged by heat styling tools, perms, and hair dyes were instructed to use the solid hair conditioner once a day for two weeks, and the condition of the cuticles before and after use was evaluated and analyzed using a scanning electron microscope (SEM, FE-SEM with EDS, Sirion, FEI). The SEM scanned the surface of the material with a fine electron beam under vacuum conditions to image the microstructure of the test subject, and the degree of cuticle damage of the imaged hair was visually evaluated on a scale of 0 to 6. A higher score indicates a greater degree of hair damage.

[0216] As shown in Table 13 and Figure 4 below, after using the solid hair conditioner for two weeks, the hair cuticle damage evaluation score was significantly reduced compared to before use, showing a statistically significant difference (p<0.05). In addition, after using the solid hair conditioner for two weeks, the condition of the hair with damaged cuticles showed an 85% improvement rate, which suggests that the solid hair conditioner is effective in restoring hair with damaged cuticles.

[0217] Subject (NO.) Hair cuticle damage evaluation score before use Hair cuticle damage evaluation score after 2 weeks of use 1 2 0 2 3 1 3 3 0 4 3 0 5 2 0 6 3 1 7 2 1 8 2 1 9 2 1 1 3 0 1 1 3 1 1 2 2 1 1 3 2 1 4 3 0 1 5 3 0 1 6 2 1 7 2 1 8 2 2 1 9 23 3 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2

[0218] [Example 12] Sensory evaluation of solid hair conditioner according to user

[0219] A sensory evaluation was conducted on the solid hair conditioner prepared as in Preparation Example 6. For the evaluation, 20 subjects with hair damaged by heat styling tools, perms, and hair dyes were asked to use the solid hair conditioner once a day for two weeks, and a survey was conducted regarding the hair cuticle improvement effect, moisture, smoothness, absorption, spreadability, scent, and overall user experience. The evaluation scores were based on a 5-point scale (5 points: strongly agree, 4 points: agree, 3 points: neutral, 2 points: disagree, 1 point: strongly disagree), and a score of 3 points or higher was considered a positive response.

[0220] As shown in Table 14 below, it was confirmed that the 20 subjects gave very positive responses, with an average evaluation score of 3 points or higher.

[0221] Evaluation Item Rating Score Hair Cuticle Improvement Effect 4.3 Moisture 4.2 Smoothness 4.2 Absorption 4.05 Spreadability 4 Scent 4.15 Overall User Experience 4.15

[0222] [Example 13] Evaluation of eco-friendliness based on the biodegradability of solid hair conditioner

[0223] The eco-friendliness of the solid hair conditioner prepared as in Preparation Example 6 was evaluated based on its biodegradability. The biodegradability test method was conducted according to KS I ISO 7827:1994.

[0224] As shown in Table 15 below, the biodegradability of the solid hair conditioner was measured, and it was confirmed that the biodegradability of the solid hair conditioner was 94%, which significantly exceeds the biodegradability standard (≥60%). Therefore, it was confirmed that the solid hair conditioner is an excellent eco-friendly composition.

[0225] Test Item: Solid Hair Conditioner Test Method: Biodegradability (%) 94KS I ISO 7827:1994

[0226] [Example 13] Evaluation of eco-friendliness of solid hair conditioner according to biocarbon content. The eco-friendliness of the solid hair conditioner prepared as in Example 6 was evaluated according to its biocarbon content. The biocarbon content was measured according to the test method ASTM D6866-2.

[0227] As shown in Table 16 below, the biocarbon content of the solid hair conditioner was measured and found to be 93%. Therefore, it was confirmed that the solid hair conditioner is composed mostly of bio-based raw materials, making it an excellent eco-friendly composition composed of sustainable materials and carbon reduction.

[0228] Test Item Solid Hair Conditioner Biocarbon Content (%) 94 Radiocarbon Isotope Content (pMC) (%) 92.78 ± 0.33

[0229] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form. The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and their equivalents should be interpreted as being included within the scope of the present invention.

Claims

Coconut oil; and A solid surfactant composition comprising one or more of castor oil, camellia oil, and rice bran oil as an active ingredient. In paragraph 1, The above solid surfactant composition is characterized by further comprising, as an active ingredient, one or more powders, extracts, or hydrolysates of one or more silkworm-derived materials selected from silkworm larvae, pupae, cocoons, and silk. Solid surfactant composition. In paragraph 1, The above-mentioned solid surfactant composition includes an alkali hydroxide, and The above alkali hydroxide is characterized as being potassium hydroxide or sodium hydroxide. Solid surfactant composition. In paragraph 1, The above solid surfactant composition is characterized by comprising coconut oil, castor oil, and camellia oil. Solid surfactant composition. In Paragraph 4, The above solid surfactant composition is characterized by having a weight ratio of 10 to 40 parts castor oil and a weight ratio of 10 to 40 parts camellia oil, based on 100 parts by weight of coconut oil. Solid surfactant composition. A cosmetic composition for cleansing comprising the solid surfactant composition of claim 1. In paragraph 6, The above cosmetic composition is characterized by being in a solid form, Cosmetic composition. In paragraph 6, The above cosmetic composition comprises a first moisturizing and nourishing ingredient; Second moisturizing nourishing ingredient; and Characterized by further including foaming and solid-forming components, Cosmetic composition. In paragraph 8, The above-mentioned first moisturizing nutritional ingredient is, One or more selected from the group consisting of coconut oil, jojoba oil, shea butter, white tea (green tea) extract, baobab oil, rosemary extract, myrstic acid, anhydrous ethanol, lauric acid, and stearic acid, and The above second moisturizing nutritional ingredient is, Characterized by being one or more selected from the group consisting of butylene glycol, hyaluronic acid, sorbitol, natural betaine, vitamin, hexanediol, olive oil, ceramide powder, D-panthenol, dietary sulfur, olive emulsifying wax, soy lecithin, Houttuynia cordata extract, and rosemary water. Cosmetic composition. In Paragraph 8, The above foaming and solid-forming components are, Characterized by being one or more selected from the group consisting of sodium cocoyl isethionate, corn starch, sodium bicarbonate, citric acid, tartaric acid, tartaric acid, SLSA, keratin powder, and arginine. Cosmetic composition. A solid body wash comprising the cosmetic composition of claim 6 as an active ingredient. A solid face wash comprising the cosmetic composition of claim 6 as an active ingredient. A solid shampoo comprising the cosmetic composition of claim 6 as an active ingredient. A solid hair conditioner comprising the cosmetic composition of claim 6 as an active ingredient.

Images