Hair care composition with two-way conditioning function of coarse, hard and curled hair and fine, soft and collapsed hair

Abstract

The invention belongs to the field of daily chemicals, and particularly relates to a hair care composition with a coarse and hard curled and fine and soft collapsed hair two-way conditioning function, which comprises the following components in percentage by weight: 1.5-15% of amino acid surfactant, 5-10% of essence, 1-5% of essence, 1-5% of essence and the balance of water. 0.2-5% of a protein repairing agent; 0.01 to 0.25 percent of a cationic conditioner; 0.02 to 0.4 percent of a cationic polysaccharide proppant; 0.1 to 1.5 percent of a sterol sealing agent; 0.2%-2% of a moisturizing conditioner; 0.05%-1.2% of a polysaccharide humectant; 0.2 to 1.5% of a small molecule peptide supplement; 0.375 to 3.75% of a zwitterionic surfactant; 0.01-2% of a pH regulator; and the balance pure water. The composition can accurately meet the microscopic requirements of coarse and hard curly hair quality and fine, soft and collapsed hair quality, the pain points of two different hair quality are solved in a targeted mode, and meanwhile the two effects do not interfere with each other.

Description

Technical Field

[0001] This invention belongs to the field of daily chemical products, and specifically relates to a hair care composition that has a dual conditioning function for both coarse and curly hair and fine and limp hair. Background Technology

[0002] Everyone's hair type is different, mainly falling into two common categories: coarse, frizzy, and fine, limp. Coarse hair has raised cuticles and overly strong disulfide bonds in the cortex, resulting in high hair rigidity. Fine hair has thinner hair strands with insufficient support, and a weaker, more easily damaged cuticle structure. Therefore, hair care products are formulated with different formulas to better suit different hair types and enhance their effectiveness. Currently, most hair care products on the market are single-function products targeting only one hair type. Smoothing products for coarse hair can easily cause fine, limp hair, while volumizing products for fine, limp hair cannot improve the frizz of coarse hair. Because family members often have different hair types, consumers frequently purchase multiple products, increasing their overall cost.

[0003] Furthermore, in the field of hair care, surfactants are the core foundation for building conditioning systems. Among them, amino acid surfactants are gradually becoming a preferred ingredient category due to their mildness and biocompatibility. However, the current application of amino acid surfactants in hair care products is limited to single-function scenarios. On the one hand, at low concentrations, their anionic properties are only utilized as mild cleansers for shampoos and hair care products for sensitive scalps. On the other hand, the lamellar liquid crystal phase formed at high concentrations is used as a humectant carrier, providing basic hydration only for dry and damaged hair. The development of amino acid surfactants suitable for multiple hair types is severely lacking. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hair care composition that has a dual conditioning function for coarse and curly hair and fine and limp hair. The composition of the present invention can accurately match the microscopic needs of coarse and curly hair and fine and limp hair, and specifically solve the pain points of the two different hair types, while the two effects do not interfere with each other.

[0005] The technical solution adopted by the present invention to solve the above problems is as follows:

[0006] A hair care composition with dual conditioning functions for both coarse, curly and fine, limp hair comprises the following components by weight percentage: 1.5–15% amino acid surfactant; 0.2–5% protein repair agent; 0.01–0.25% cationic conditioning agent; 0.02–0.4% cationic polysaccharide supporting agent; 0.1–1.5% sterol occlusive agent; 0.2–2% moisturizing conditioning agent; 0.05–1.2% polysaccharide moisturizing agent; 0.2–1.5% small molecule peptide supplement; 0.375–3.75% amphoteric surfactant; 0.01–2% pH adjuster; balance: purified water;

[0007] The amino acid surfactant includes sodium lauroyl glutamate; the protein repair agent is free of sulfates and phosphates, has a molecular weight ≤5000 Da, and an isoelectric point of 5.0–7.0; the cationic conditioning agent has a charge density of 2.5–4.5 meq / g; the sterol blocking agent has a melting point of 50–150°C; the cationic polysaccharide support agent has a degree of substitution of 0.2–0.6; the small molecule peptide supplement has a molecular weight ≤2000 Da; the polysaccharide moisturizer has a molecular weight of 100,000–1,000,000 Da; the mass ratio of the zwitterionic surfactant to the amino acid surfactant is 1:2–10; and the pH of the hair care composition is 5.0–7.0.

[0008] Through the above technical solutions, the composition of the present invention can improve coarse, curly hair and fine, soft, limp hair respectively, and has a smoothing effect on coarse, curly hair and a volumizing effect on fine, soft, limp hair.

[0009] Preferably, the hair care composition comprises the following components by weight percentage: 1.5-15% amino acid surfactant; 2-3% protein repair agent; 0.08-0.18% cationic conditioner; 0.1-0.32% cationic polysaccharide support agent; 0.7-0.9% sterol occlusive agent; 1-1.4% moisturizing conditioner; 0.5-1% polysaccharide moisturizer; 0.6-1% small molecule peptide supplement; 1.25-3.25% zwitterionic surfactant; 0.01-2% pH adjuster; and the balance being purified water.

[0010] The amino acid surfactant includes sodium lauroyl glutamate; the protein repair agent is free of sulfates and phosphates, has a molecular weight ≤5000 Da, and an isoelectric point of 5.0–7.0; the cationic conditioning agent has a charge density of 2.5–4.5 meq / g; the sterol blocking agent has a melting point of 50–150°C; the cationic polysaccharide support agent has a degree of substitution of 0.2–0.6; the small molecule peptide supplement has a molecular weight ≤2000 Da; the polysaccharide moisturizer has a molecular weight of 10–1,000,000 Da; the mass ratio of the zwitterionic surfactant to the amino acid surfactant is 1:2–10; and the pH of the hair care composition is 5.0–7.0.

[0011] Furthermore, the amino acid surfactant may also include an auxiliary amino acid surfactant, which includes at least one of potassium lauroyl glutamate, sodium cocoyl glutamate, and potassium cocoyl glutamate; if the auxiliary amino acid surfactant contains potassium lauroyl glutamate, the amount of amino acid surfactant added is 6-12%.

[0012] Furthermore, the amount of the auxiliary amino acid surfactant added is less than or equal to 50% of the mass of sodium lauroyl glutamate.

[0013] Furthermore, the protein-based repair agent includes at least one of hydrolyzed keratin, hydrolyzed silk protein, hydrolyzed collagen, and hydrolyzed wheat protein.

[0014] Through the above technical solutions, this type of protein repair agent can penetrate into the cortex of coarse and hard hair, forming a gentle cross-link with the excessively strong disulfide bonds to weaken the rigidity of the hair strands. At the same time, it can fill the gaps between the hair cuticles, promote the closure of the hair cuticles, and make the hair smooth.

[0015] Furthermore, the hydrolyzed keratin has a molecular weight of 1000-5000 Da, the hydrolyzed silk protein is of animal origin and has a serine content of ≥30%; the hydrolyzed wheat protein is of plant origin; and the hydrolyzed collagen is of marine or bovine bone origin and has a hydroxyproline content of ≥10%.

[0016] Furthermore, the cationic conditioner includes at least one of polyquaternium-73, polyquaternium-10, polyquaternium-47, and polyquaternium-39.

[0017] Through the above technical solution, the zeta potential on the hair surface is -15 to -30mV. This type of cationic conditioning agent can be directionally adsorbed on the raised area of ​​the hair cuticle in coarse and hard hair, forming a flexible protective film and reducing frizz.

[0018] Furthermore, the charge density of the polyquaternium-73 is 3.0 to 4.0 meq / g, the polyquaternium-10 is modified with hydroxyethyl cellulose and has a molecular weight of 500,000 to 1,000,000 Da; the polyquaternium-47 is an acrylic acid copolymer with a water solubility of ≥99%; and the polyquaternium-39 is an acrylamide copolymer.

[0019] Furthermore, the cationic polysaccharide support includes at least one of hydroxypropyltrimethylammonium chloride chitosan, cationic guar gum, and cationic hydroxyethyl cellulose.

[0020] Through the above technical solution, this type of cationic polysaccharide support agent can form a three-dimensional network structure on the surface of fine and soft hair, enhance the support of the hair, and thus achieve a natural and fluffy hair effect.

[0021] Furthermore, the degree of deacetylation of the hydroxypropyltrimethylammonium chloride chitosan is ≥85%, and the degree of substitution is 0.3-0.5; the charge density of the cationic guar gum is 1.0-2.0 meq / g; and the molecular weight of the cationic hydroxyethyl cellulose is 200,000-500,000 Da.

[0022] Furthermore, the sterol blocking agent includes at least one of phytosterol oleate, cholesterol stearate, and modified lanosterol ester.

[0023] Through the above technical solution, this type of sterol occlusive agent can soften the cortical fibers of coarse and stiff hair, improve the smoothness of the hair strands, and does not affect the support of fine and soft hair.

[0024] Furthermore, the moisturizing conditioning agent includes at least one of panthenol, glycerin, propylene glycol, and allantoin.

[0025] Through the above technical solution, this type of moisturizing conditioner can penetrate into the cuticle of soft hair, repair the weak cuticle, improve hair toughness, and reduce hair breakage.

[0026] Preferably, the panthenol has a purity of ≥99%; the glycerol is food grade with a purity of ≥99.5%; the propylene glycol is pharmaceutical grade; and the allantoin has a purity of ≥98%.

[0027] Furthermore, the small molecule peptide supplement includes at least one of hydrolyzed rice protein, hydrolyzed oat protein, hydrolyzed soy protein, and hydrolyzed pea protein; the hydrolyzed rice protein has a molecular weight of 500-2000 Da; the hydrolyzed oat protein contains ≥25% glutamine; and the hydrolyzed soy protein contains ≥40% amino acids.

[0028] Through the above technical solution, this type of small molecule peptide supplement can combine with the negative charge on the surface of fine and soft hair to form a dense protective layer, reducing the damage of external factors to the hair, while not increasing the heaviness of the hair, making fine and soft hair more fluffy and not flat.

[0029] Furthermore, the zwitterionic surfactant includes at least one of cocamidopropyl betaine, lauramidopropyl betaine, cocamidopropyl hydroxysulfonate, and sodium lauroamphoacetate.

[0030] Through the above technical solutions, zwitterionic surfactants can work synergistically with amino acid surfactants to stabilize the layered liquid crystal structure, reduce the possibility of carrier rupture due to component load, and enrich and optimize foam characteristics, so that both coarse and fine hair can have a good rinsing experience.

[0031] Furthermore, the polysaccharide moisturizer includes at least one of sodium hyaluronate, zinc hyaluronate, calcium hyaluronate, and acetylated sodium hyaluronate.

[0032] Through the above technical solution, this type of polysaccharide moisturizer can form a moisturizing film on the hair surface, balancing the moisture needs of both coarse and fine hair types, while enhancing the stability of the active ingredients.

[0033] Furthermore, the molecular weight of the sodium hyaluronate is 100,000 to 500,000 Da; the zinc content of the zinc hyaluronate is ≥50%; the calcium content of the calcium hyaluronate is ≥0.3%; and the degree of acetylation of the acetylated sodium hyaluronate is ≥20%.

[0034] Furthermore, the pH adjuster includes citric acid.

[0035] Furthermore, the hair care composition may also include at least one of the following components: 0.01-0.5% chelating agent; 0.01-1.5% preservative; 0.01-2% fragrance agent; and 0.01-2% viscosity modifier.

[0036] Furthermore, the chelating agent includes EDTA-2Na.

[0037] Furthermore, the preservative includes at least one of phenoxyethanol and sodium benzoate.

[0038] Preferably, the preservative includes phenoxyethanol and sodium benzoate, wherein the amount of phenoxyethanol added is 0.5-0.9% and the amount of sodium benzoate added is 0.3-0.5%.

[0039] Furthermore, the fragrance agent includes fragrance.

[0040] Furthermore, the viscosity modifier includes sodium chloride.

[0041] The present invention has the following beneficial effects:

[0042] 1. The composition of this invention can precisely match the microscopic needs of coarse, curly hair and fine, limp hair, specifically addressing the pain points of these two different hair types, while the two effects do not interfere with each other. For coarse, curly hair with excessively raised cuticles and overly strong disulfide bonds in the cortex, resulting in high hair rigidity and noticeable frizz, the coarse-hardening targeting component in the composition can penetrate into the cortex and form a gentle cross-link with the overly strong disulfide bonds, thereby weakening the rigidity of the hair's internal structure. At the same time, the cationic components are directionally adsorbed in the areas where the cuticles are raised, filling the gaps and promoting cuticle closure, thereby reducing the friction on the hair surface. This improves frizz from a microscopic level without increasing the heaviness of the hair and preventing it from becoming flat. For fine, limp hair with a thin diameter, insufficient support, and a weak, easily damaged cuticle structure, the fine-targeting ingredients in the composition can form a three-dimensional mesh structure on the hair surface, enhancing the overall rigidity of the hair through physical support and reducing the drooping of the hair due to its own weight. At the same time, the small-molecule repair ingredients can penetrate into the internal structure of the cuticle to fill the damaged areas, strengthen the stability of the cuticle structure, and reduce the risk of hair breakage. Furthermore, the composition does not form a thick film on the hair surface, which can enhance the toughness of fine, limp hair while ensuring a fluffy effect.

[0043] 2. The composition of the present invention can simultaneously achieve a smoothing effect for coarse and hard hair and a volumizing effect for fine and soft hair, which can help consumers reduce usage costs and storage pressure. At the same time, consumers do not need to distinguish hair type and select corresponding products, which effectively avoids problems such as cuticle damage and cortical structure imbalance caused by mixing products. It simplifies the usage process while ensuring conditioning effect. Detailed Implementation

[0044] To make the technical problems, solutions, and advantages of this invention clearer, a detailed description will be provided below with reference to specific examples. However, the scope of protection of this invention is not limited to the following specific embodiments. The described embodiments are merely some, not all, of the embodiments of this invention, and are not intended to limit the invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0045] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0046] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0047] In the quantitative experiments in the following examples, three replicate experiments were set up, and the data are the average of the three replicate experiments or the average ± standard deviation.

[0048] The present invention includes Examples 1 to 5 and Comparative Examples 1 to 4, and the specific composition and content are shown in Table 1, with the unit being weight percentage.

[0049] Table 1

[0050]

[0051]

[0052] Specifically, the preparation methods of Examples 1 to 5 above include the following steps:

[0053] S1. Add three-quarters of the formula amount of pure water to the container, add EDTA-2Na, and stir at 40℃ until completely dissolved to obtain material 1;

[0054] S2. Heat material 1 to 85°C and maintain it. Slowly and evenly sprinkle in polyquaternium-10 and cationic guar gum at a stirring rate of 400 r / min. Stir at 85°C for 25 minutes until there are no particles, and obtain a uniform gel base.

[0055] S3. Add sodium lauroyl glutamate, cocamidopropyl betaine, and phytosterol oleate to the gel base in sequence, and stir at 85°C for 30 minutes until completely dissolved to obtain material 2;

[0056] S4. Turn on the cooling system to cool material 2 to 40°C, then add hydrolyzed rice protein, panthenol, sodium hyaluronate, phenoxyethanol, and sodium benzoate in sequence, and stir at a rate of 200 r / min for 20 to 30 minutes to obtain material 3.

[0057] S5. Add citric acid to material 3 to adjust the pH to 6.0, then add flavoring, stir at 200 r / min for 10-20 minutes, then adjust the viscosity of the system to 6-8 Pa·s with sodium chloride, add the remaining pure water to 100%, continue stirring for 10-15 minutes, and cool to room temperature to obtain the finished product.

[0058] The preparation method of Example 6 differs from that of Examples 1 to 5 in that: S3. Sodium lauroyl glutamate, potassium lauroyl glutamate, cocamidopropyl betaine and phytosterol oleate are added sequentially to the gel base, and stirred at 85°C for 30 minutes until completely dissolved to obtain a transparent or translucent material 2.

[0059] Similarly, the preparation method for the comparative example can be obtained. If there are substances that need to be replaced or deleted, they can be replaced or deleted in the corresponding preparation steps.

[0060] Experimental testing

[0061] Hair samples and experimental groups used in the experiment:

[0062] Coarse, stiff, and curly hair samples: Untreated human hair bundles with a diameter ≥90μm and a cuticle lifting rate ≥40% were selected. Each bundle weighed (2.0±0.1)g and had a length of (15±0.5)cm. Four hair bundles were selected for each group of samples, and three parallel tests were conducted.

[0063] Fine, soft, and limp hair samples: Untreated human hair bundles with a diameter ≤50μm and a support force ≤0.15N were selected. Each bundle weighed (2.0±0.1)g and had a length of (15±0.5)cm. Four hair bundles were selected for each group of samples, and three parallel tests were conducted.

[0064] Take coarse, curly hair samples and fine, limp hair samples, wash them with deionized water and air dry them naturally to serve as the control group;

[0065] Take samples from each group and apply them to coarse, curly hair samples and fine, soft, limp hair samples at a ratio of 0.5g sample / 2g hair strand. After rubbing for 3 minutes, rinse thoroughly with 38℃ deionized water and let them air dry. These are the experimental groups.

[0066] Hair cuticle closure rate test

[0067] Testing method: A blank group of coarse and stiff hair samples was taken. The number of raised hair cuticles was observed and counted by SEM, and the initial raised rate was calculated. Then, the morphology of hair cuticles in the experimental group of coarse and stiff hair samples was observed by SEM. Five fields of view were randomly selected, and the number of closed hair cuticles was counted. The hair cuticle closure rate was calculated according to the formula: Hair cuticle closure rate = (number of closed hair cuticles / total number of hair cuticles) × 100%. Each group was tested in parallel 3 times, and the average value was taken.

[0068] Hair stiffness test

[0069] Test method: Using the three-point bending mode of DMA, the blank group of coarse and stiff hair samples and the experimental group of coarse and stiff hair samples were fixed on the fixture. The test temperature was set to 25℃, the humidity to 50%, and the loading rate to 1mm / min. The maximum stress when the hair breaks was recorded as the hair stiffness index.

[0070] Surface friction coefficient test

[0071] Test method: Using a friction coefficient meter, the blank group of coarse and stiff hair samples and the experimental group of coarse and stiff hair samples were fixed on the stage. The friction head pressure was set to 200g and the moving speed was 5mm / s. The friction coefficient of the hair surface was measured.

[0072] Cuticle reinforcement test

[0073] Testing method: Fine, limp hair samples were taken as a blank group and an experimental group. The integrity of the hair cuticle was observed by SEM. Five fields of view were randomly selected, and the number of hair cuticle defects was counted. The initial defect rate and the defect rate after treatment were calculated. The hair cuticle reinforcement rate was calculated according to the formula: Hair cuticle reinforcement rate = (initial defect rate - defect rate after treatment) / initial defect rate × 100%. Each group was tested in parallel for 3 times, and the average value was taken.

[0074] Hair diameter change test

[0075] Testing method: Using a laser particle size analyzer, the diameter of the blank group and the experimental group of fine and limp hair samples were measured respectively. 20 hair strands were randomly selected from each group, and the diameter data were recorded. The diameter change rate was calculated as follows: Diameter change rate = (diameter after treatment - initial diameter) / initial diameter × 100%. If the change rate is within ±5%, it indicates that the ingredients did not cause excessive expansion or contraction of the hair strands, which meets the requirements of mild conditioning.

[0076] Hair support strength test

[0077] Testing Method: A single hair strand tensile tester was used. 20 hair strands were randomly selected from both the blank and experimental groups of fine, limp hair samples. The test environment was set at 25℃ and 50% humidity, with a loading rate of 0.5mm / min. The stress value (unit: MPa) of the hair strand under 0.5% strain was recorded. A higher value indicates stronger hair support. Simultaneously, a 1g bundle of treated fine, limp hair (15cm in length) was placed in a volume tester. The initial height was determined as follows: the hair bundle was combed until it was naturally dispersed without knots. A silicone sheet was gently lifted from the top until the hair bundle was fully extended without bending or drooping. The value corresponding to the scale plate of the tester was read (accuracy 0.1mm). This was repeated three times, and the average value was taken as the initial height. The silicone sheet was then removed, and the hair bundle was allowed to hang naturally. The height difference (initial height - height after drooping) was measured. A smaller height difference indicates better volume support. Each group was tested in parallel three times, and the average value was taken.

[0078] Stability test of sodium lauroyl glutamate layered liquid crystal phase

[0079] Detection method: Take 1g of each sample from Examples 1-5 and Comparative Examples 1-4, spread it evenly on a glass slide, cover it with a coverslip, place it under a polarizing microscope, adjust the magnification to 400x, and observe whether typical Maltese cross patterns appear. At the same time, place the samples in a 48℃ constant temperature oven for accelerated aging for 28 days, and observe the changes in polarized texture periodically (on days 7, 14, and 28). If the texture remains clear and without obvious breakage, the laminar liquid crystal phase is considered stable.

[0080] Test on the effect of pH on zwitterionic properties

[0081] Detection method: The initial pH value of each group of samples was measured with a pH meter. 0.1 g of each sample from Examples 1-5 and Comparative Examples 1-4 was dissolved in 100 mL of deionized water to prepare a 0.1 wt% aqueous solution. The surface tension was measured with a surface tension meter. If the surface tension was in the range of 30-40 mN / m, it indicated that the amino acid surfactant was in an amphoteric state. If it exceeded this range, it indicated that the amphoteric properties were destroyed.

[0082] Quick stability test

[0083] Detection method: Take 5g of each sample from Examples 1-5 and Comparative Examples 1-4, place them in centrifuge tubes, centrifuge at 3000r / min for 15min, and observe whether stratification, flocculation or precipitation occurs.

[0084] Stimulation test

[0085] Patch test

[0086] Detection Method: Thirty-three healthy volunteers were recruited. The test substance was the sample from Example 2 (diluted 100-fold), and the negative control was a blank without the test substance. The test substance was applied to the back skin for 24 hours. Skin reactions were observed and scored according to standards at 0.5 hours, 24 hours, and 48 hours after removal of the test substance: 2 points: mild erythema; 3 points: erythema, infiltration, papules; 4 points: significant erythema, severe infiltration, and aggregated vesicles.

[0087] Consumer usage test

[0088] To verify the bidirectional conditioning effect of the composition of this invention on coarse, curly hair and fine, limp hair from a macroscopic level perceptible to consumers, the following comparative experiment was conducted:

[0089] Test Method: 150 subjects meeting the hair quality standards were selected, including 60 with coarse, curly hair and 60 with fine, limp hair. Subjects were randomly divided into three groups according to hair type: experimental group (using Example 2, 30 coarse / 30 fine), product control group (coarse hair using product A / fine hair using product B, 30 each), and blank control group (using only water, 15 coarse / 15 fine). The experimental group used the sample from Example 2 of this invention, while the control group used commercially available single-function products. Specifically, coarse hair control group A used the commercially available Avanta Plant Repairing Hair Core Shampoo; fine hair control group B used the commercially available Dermaclay Fine Hair Shampoo; and the blank control group used only water. The blank control group consisted of 15 coarse / 15 fine hair subjects, consistent with the total ratio of 60 coarse / 60 fine / 60 subjects (1:1), avoiding discrepancies between the test results of the blank control group and actual hair quality due to hair quality imbalance, thus further ensuring the data's reference value. During the period, participants maintained a shampooing frequency of three times a week, without using any additional hair care products. After four weeks of continuous use of the corresponding product, a blind test was conducted using a 0-100 point rating system (higher scores indicate better perceived efficacy), and changes in the macroscopic condition of the hair were recorded simultaneously. Special note: The two evaluation dimensions for the cross-hair-type family scenario (compatibility with all family hair types and ease of use) primarily assess whether a single product can simultaneously meet the conditioning needs of various hair types within the family, including coarse, fine, and soft hair, and whether it is necessary to differentiate hair types or purchase additional products during use. The blank control group (washing with water only) did not use any products, thus eliminating the scenario of product sharing or ease of use; therefore, no corresponding test data were available for the blank control group in this scenario.

[0090] Test data summary

[0091] Table 2 summarizes the test data on the core conditioning effects for coarse, curly hair and fine, limp hair.

[0092] Table 2

[0093]

[0094]

[0095] Table 3 shows the stability test results of sodium lauroyl glutamate (SLG) layered liquid crystal phase.

[0096] Table 3

[0097]

[0098] Table 4 shows the test data on the effect of pH on the properties of zwitterions.

[0099] Table 4

[0100]

[0101]

[0102] Table 5 shows the results of the rapid stability test.

[0103] Table 5

[0104] Group Phenomena after centrifugation Stability determination Example 1 No stratification, no flocculation, no sedimentation Stablize Example 2 No stratification, no flocculation, no sedimentation Stablize Example 3 No stratification, no flocculation, no sedimentation Stablize Example 4 Slight stratification Unstable Example 5 Slight stratification Unstable Example 6 No stratification, no flocculation, no sedimentation Stablize Comparative Example 1 Obvious flocculation Unstable Comparative Example 2 Obvious sedimentation Unstable Comparative Example 3 Severe stratification Unstable Comparative Example 4 Slight flocculation Unstable

[0105] The test results of Examples 1-5 show that the hair care composition of the present invention with sodium lauroyl glutamate (SLG) as the core carrier has a two-way conditioning effect on coarse and curly hair and fine and soft hair. It also shows outstanding performance in terms of system stability and component synergy. The test results of Examples 1-5 show that Examples 1-3 and Examples 6 are within the preferred formulation range of the present invention, with Example 2 being a better formulation.

[0106] As can be seen from the test data in Table 2, in terms of efficacy, for coarse, stiff, and curly hair, the cuticle closure rate of Example 2 reached 85.4%, the hair stiffness decreased from 288MPa to 132.7MPa, and the surface friction coefficient decreased from 0.688 to 0.256, which can effectively soften the cortex and smooth the cuticles to improve frizz. For fine, soft, and limp hair, the cuticle reinforcement rate was 83.8%, the 0.5% strain stress value of the hair increased from 8.2MPa to 18.3MPa, and the diameter change rate was controlled at 0.95%, which can accurately strengthen the hair support and cuticle stability without increasing the weight of the hair.

[0107] Based on the test data in Tables 3 and 4, in terms of system stability, Examples 1-3 and Example 6 maintained clear Maltese cross-shaped patterns during initial observation and 28 days of accelerated aging at 48℃. After centrifugation, there was no stratification, and the surface tension remained stable at 34.8-35.5 mN / m at pH 6.0, with normal zwitterionic properties. However, Examples 4-5 and Comparative Examples 1-4 exhibited stability issues such as lamellar liquid crystal phase rupture and destruction of zwitterionic properties. Among these, Example 2 showed superior cuticle closure rate, improved support force, and stability compared to the other examples, making it a superior formulation that balances bidirectional conditioning effects with system stability.

[0108] Table 6 Patch Test Results

[0109]

[0110] The skin patch test in Example 2 fully demonstrated the mild safety of the hair care composition of the present invention. At all observation time points, the skin reaction scores of all 33 subjects were 0 (no erythema, papules, or other irritation symptoms), completely consistent with the negative control group (blank), and were therefore determined to be "non-irritating." This result indicates that the component system of the present invention, constructed with natural plant extracts and low-irritant synthetic raw materials such as sodium lauroyl glutamate, panthenol, and phytosterol oleate, not only adapts to the microstructure of hair to achieve bidirectional conditioning, but also matches the natural pH environment of the scalp (pH 5.5–6.5), exhibiting no skin irritation and making it safe for people with sensitive scalps to use.

[0111] Table 7 shows the results of the consumer test.

[0112] Table 7

[0113]

[0114] The test results in Table 7 further validated the bidirectional adaptability of the formula in Example 2 to coarse, curly hair and fine, soft, limp hair, as well as its suitability for home use.

[0115] In a study of 60 participants with coarse, curly hair, the experimental group using the sample from Example 2 scored significantly higher than the control group A and the blank control group in core dimensions such as frizz reduction, wet hair smoothness, and dry hair softness. Among them, the wet hair smoothness was improved by about 37.3% compared with the control group A, meeting the core needs of coarse hair to be smooth and easy to manage.

[0116] In a study of 60 participants with fine, limp hair, the experimental group using the sample from Example 2 showed significantly better performance than the control group (B) and the blank control group in key indicators such as root support and volume, duration of volume effect, and overall hair strength. Specifically, root support and volume improved by approximately 31.0% compared to control group B, duration of volume effect improved by approximately 84.3% compared to control group B, and overall hair strength improved by approximately 55.7% compared to control group B, thus addressing the problem of fine, limp, and easily broken hair.

[0117] In the evaluation of family scenarios with different hair types, Example 2 achieved a score of 93.5 in terms of family compatibility and ease of use, far exceeding the control groups A and B. This indicates that the composition of the present invention does not need to distinguish hair types and can be used by the whole family, accurately solving the problem of purchasing costs and storage burden for families with multiple hair types who need to buy multiple products.

[0118] This invention solves the problem of traditional formulas that cause mutual repulsion and interference of efficacy between coarse and fine hair components by using "layered liquid crystal targeting carrier" technology, so that the composition of this invention has significant efficacy, excellent stability and wide applicability to families.

[0119] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0120] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0121] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A hair care composition that combines the functions of conditioning both coarse, curly hair and fine, limp hair, characterized in that, It comprises the following components by weight percentage: amino acid surfactants 1.5–15%; protein repair agents 0.2–5%; cationic conditioners 0.01–0.25%; cationic polysaccharide support agents 0.02–0.4%; sterol blocking agents 0.1–1.5%; moisturizing conditioners 0.2–2%; polysaccharide moisturizers 0.05–1.2%; small molecule peptide supplements 0.2–1.5%; amphoteric surfactants 0.375–3.75%; pH adjusters 0.01–2%; balance: purified water; The amino acid surfactant includes sodium lauroyl glutamate; the protein repair agent is free of sulfates and phosphates, has a molecular weight ≤5000 Da, and an isoelectric point of 5.0–7.0; the cationic conditioning agent has a charge density of 2.5–4.5 meq / g; the sterol blocking agent has a melting point of 50–150°C; the cationic polysaccharide support agent has a degree of substitution of 0.2–0.6; the small molecule peptide supplement has a molecular weight ≤2000 Da; the polysaccharide moisturizer has a molecular weight of 100,000–1,000,000 Da; the mass ratio of the zwitterionic surfactant to the amino acid surfactant is 1:2–10; and the pH of the hair care composition is 5.0–7.

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2. The hair care composition according to claim 1, which has a dual conditioning function for both coarse, curly and fine, limp hair, is characterized in that... The amino acid surfactant may further include an auxiliary amino acid surfactant, which includes at least one of potassium lauroyl glutamate, sodium cocoyl glutamate, and potassium cocoyl glutamate; if the auxiliary amino acid surfactant contains potassium lauroyl glutamate, the amount of amino acid surfactant added is 6-12%.

3. The hair care composition according to claim 2, which has a dual conditioning function for both coarse, curly and fine, limp hair, is characterized in that... The amount of the auxiliary amino acid surfactant added is less than or equal to 50% of the mass of sodium lauroyl glutamate.

4. The hair care composition according to claim 1, which has a dual conditioning function for both coarse, curly and fine, limp hair, is characterized in that... The protein-based repair agent includes at least one of hydrolyzed keratin, hydrolyzed silk protein, hydrolyzed collagen, and hydrolyzed wheat protein.

5. The hair care composition according to claim 1, which has a dual conditioning function for both coarse, curly and fine, limp hair, is characterized in that... The cationic conditioner includes at least one of polyquaternium-73, polyquaternium-10, polyquaternium-47, and polyquaternium-39.

6. The hair care composition according to claim 1, which has a dual conditioning function for both coarse, curly and fine, limp hair, is characterized in that... The cationic polysaccharide support includes at least one of hydroxypropyltrimethylammonium chloride chitosan, cationic guar gum, and cationic hydroxyethyl cellulose.

7. The hair care composition according to claim 1, which has a dual conditioning function for both coarse, curly and fine, limp hair, is characterized in that... The sterol blocking agent includes at least one of phytosterol oleate, cholesterol stearate, and modified lanosterol ester.

8. The hair care composition according to claim 1, which has a dual conditioning function for both coarse, curly and fine, limp hair, is characterized in that... The small molecule peptide supplement includes at least one of hydrolyzed rice protein, hydrolyzed oat protein, hydrolyzed soy protein, and hydrolyzed pea protein; the hydrolyzed rice protein has a molecular weight of 500-2000 Da; the hydrolyzed oat protein contains ≥25% glutamine; and the hydrolyzed soy protein contains ≥40% amino acids.

9. The hair care composition according to claim 1, which has a dual conditioning function for both coarse, curly and fine, limp hair, is characterized in that... The zwitterionic surfactant includes at least one of cocamidopropyl betaine, lauramidopropyl betaine, cocamidopropyl hydroxysulfonate, and sodium lauroamphoacetate.

10. The hair care composition according to claim 1, which has a dual conditioning function for both coarse, curly and fine, limp hair, is characterized in that... The polysaccharide moisturizer includes at least one of sodium hyaluronate, zinc hyaluronate, calcium hyaluronate, and acetylated sodium hyaluronate.

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