A composition for scalp care containing extract of cananga odorata and a method for preparing and using the same

Abstract

The application discloses a scalp care composition containing ylang ylang flower extract and a preparation method and application thereof, relates to the technical field of scalp care cosmetics, and raw materials of the composition include, by weight, 1-6 parts of ylang ylang flower extract, 0.5-3 parts of keratin, 0.5-5 parts of centella asiatica extract, 0.1-2 parts of allantoin, 1-5 parts of trehalose, 0.2-2 parts of zinc PCA, 2-10 parts of filter liquor of schizochytrium ferment, and 65-80 parts of a carrier acceptable in the cosmetic field; the carrier acceptable in the cosmetic field is at least one of deionized water, butanediol and glycerol; the scalp care composition containing ylang ylang flower extract and the preparation method and application thereof have a synergistic effect through the seven-element combination of ylang ylang flower extract, keratin, centella asiatica extract, allantoin, trehalose, zinc PCA and filter liquor of schizochytrium ferment, and realize the effect of trinity of oil control, repair and strengthening.

Description

Technical Field

[0001] This invention relates to the field of scalp care cosmetics technology, specifically to a scalp care composition containing ylang-ylang extract, its preparation method, and its uses. Background Technology

[0002] With the fast pace of life and increasing environmental pressure, scalp health problems are becoming increasingly common, mainly manifested as excessive scalp oil production, water-oil imbalance, clogged hair follicles, flat hair roots, and brittle, easily broken hair. While there is a wide variety of scalp care products available, current commercially available and technologically advanced scalp care products have significant limitations: their effects are singular, focusing primarily on oil control or cleansing, lacking scalp barrier repair and microecological regulation; some products use irritating oil-controlling ingredients such as salicylic acid and alcohol, which can easily cause dryness, itching, and allergies; the formulation of active ingredients lacks a systematic approach, making it difficult to achieve synergistic effects of oil control, moisturizing, repair, and strengthening; and they are not specifically targeted at "oily and flat" hair: existing products cannot simultaneously address the triple problems of excessive oil production, weak hair root support, and hair breakage.

[0003] While existing patents document the use of plant extracts in scalp care, none disclose a systematic combination of ylang-ylang extract as the core ingredient, along with other components such as keratin, centella asiatica extract, and bifida ferment lysate filtrate. Furthermore, none of these patents describe a composition specifically designed for oily, flat scalps and for strengthening hair strands. Therefore, this invention provides a scalp care composition containing ylang-ylang extract, its preparation method, and its uses, thus overcoming the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a scalp care composition containing ylang-ylang extract, its preparation method and uses, in order to solve the problems of existing scalp care compositions having limited efficacy, high irritation, and poor effect on improving oily and flat scalp.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a scalp care composition containing ylang-ylang extract, wherein the raw materials, by weight, include: 1-6 parts of ylang-ylang extract, 0.5-3 parts of keratin, 0.5-5 parts of centella asiatica extract, 0.1-2 parts of allantoin, 1-5 parts of trehalose, 0.2-2 parts of zinc PCA, 2-10 parts of bifida ferment lysate filtrate, and 65-80 parts of a carrier acceptable in the cosmetic field.

[0006] Furthermore, the weight ratio of the ylang-ylang extract to the bifida ferment filtrate is 1:1 to 1:3.

[0007] Furthermore, the carrier acceptable in the cosmetic field is at least one of deionized water, butylene glycol, and glycerin.

[0008] Furthermore, the pH of the composition is 5.0 to 6.5.

[0009] This invention also discloses a method for preparing a scalp care composition containing ylang-ylang extract, used to prepare the above composition. The preparation method specifically includes the following steps:

[0010] S1. Add ylang-ylang extract, centella asiatica extract, allantoin, trehalose, and zinc PCA to deionized water and stir at 200-400 rpm for 30 minutes at 40℃-60℃ until completely dissolved to obtain mixture A.

[0011] S2. Disperse keratin in glycerol and / or butylene glycol, and stir at 300-400 rpm for 30-40 minutes at 50°C until it is evenly dispersed. Then add it to mixture A and continue stirring for 10-20 minutes until it is completely dissolved to obtain mixture B.

[0012] S3. Cool the mixture B to 35℃~40℃, add the Bifida ferment filtrate, and stir at 100~200rpm for 15~20 minutes to mix evenly to obtain mixture C.

[0013] S4. Adjust the pH of mixture C to 5.0–6.5 with citric acid solution and / or triethanolamine solution, and then homogenize and sterilize to obtain the composition.

[0014] Furthermore, in step S4, the homogenization process is carried out at 2500 rpm for 5 to 10 minutes, and the sterilization process is carried out by filtration through a 0.22 μm filter membrane or low-temperature pasteurization for 20 minutes.

[0015] The present invention also discloses the use of a scalp care composition containing ylang-ylang extract in the preparation of scalp care products, wherein the products are at least one of hair care essence, spray, shampoo, conditioner, and hair mask.

[0016] The product is used to improve scalp oiliness, regulate water-oil balance, increase hair root volume, reduce hair breakage, and enhance hair strand strength.

[0017] Furthermore, the amount of the composition added to the product is 5% to 20%.

[0018] Compared with the prior art, the scalp care composition containing ylang-ylang extract, its preparation method, and its uses provided by the present invention have the following beneficial effects:

[0019] (1) The composition provided by the present invention is a seven-component compound of ylang-ylang extract, keratin, centella asiatica extract, allantoin, trehalose, zinc PCA and bifida ferment filtrate, which has a synergistic effect and achieves the three-in-one effect of oil control, repair and toughening.

[0020] (2) The composition provided by the present invention forms a breathable protective film on the scalp, regulates the water-oil balance, enhances the support of hair roots, and achieves a long-lasting fluffy effect.

[0021] (3) The composition provided by the present invention is mild and effective, avoiding the use of irritating ingredients such as alcohol and salicylic acid, and is suitable for oily, combination and sensitive scalps.

[0022] (4) The composition preparation method provided by the present invention is simple, can be prepared at room temperature and pressure, the process is mild, easy to industrial production, and the obtained composition can be adapted to a variety of product forms and has a wide range of applications. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a flowchart illustrating a method for preparing a scalp care composition containing ylang-ylang extract, as provided in an embodiment of the present invention. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1:

[0027] Please see Figure 1 A scalp care composition containing ylang-ylang extract, wherein the raw materials by weight include: 4 parts ylang-ylang extract, 2 parts keratin, 3 parts centella asiatica extract, 1 part allantoin, 4 parts trehalose, 1 part zinc PCA, 7 parts bifida ferment filtrate, 70 parts deionized water, 3 parts glycerin, and 3 parts butylene glycol.

[0028] Preparation method of ylang-ylang extract:

[0029] Take fresh ylang-ylang flower petals, wash, dry, and pulverize them into 40-60 mesh coarse powder; add 50%-70% ethanol aqueous solution at a material-to-liquid ratio of 1:8-1:15, reflux at 45-60℃ for 2-3 times, each time for 1.5-3 hours, combine the extracts; filter, concentrate under reduced pressure at 40-55℃ until there is no alcohol odor, continue to concentrate to an extract with a relative density of 1.10-1.20 (60℃), or spray dry to make powder, thus obtaining ylang-ylang flower extract.

[0030] By controlling the weight ratio of ylang-ylang extract to bifida ferment filtrate to 1:1 to 1:3, precise synergy of the two core active ingredients is achieved.

[0031] Synergistic oil control through microecology: Ylang-ylang extract quickly regulates sebum secretion, while bifida ferment lysate stabilizes the balance of the microbial community, providing long-lasting oil suppression without rebound.

[0032] Barrier-soothing synergy: Bifida ferment lysate strengthens the scalp barrier, while ylang-ylang soothes and reduces inflammation, significantly improving gentleness and safety;

[0033] Fluffy and strong synergistic effect: Balances oil control and moisturizing, significantly improves root support and hair strand strength, and provides long-lasting improvement for oily and flat hair.

[0034] Its preparation method specifically includes the following steps:

[0035] S1. Add ylang-ylang extract, centella asiatica extract, allantoin, trehalose, and zinc PCA to deionized water and stir at 200-400 rpm for 30 minutes at 40℃-60℃ until completely dissolved to obtain mixture A.

[0036] The specific implementation method is as follows: add deionized water to the reaction vessel, turn on the stirrer, set the speed to 300-400 rpm, and heat the water bath to 50°C; then add ylang-ylang extract, centella asiatica extract, allantoin, trehalose, and zinc PCA in sequence, keep stirring at 50°C for 30 minutes until all solids are completely dissolved and the system is clear and transparent to obtain mixture A.

[0037] S2. Disperse keratin in glycerol and / or butylene glycol, and stir at 300-400 rpm for 30-40 minutes at 50°C until it is evenly dispersed. Then add it to mixture A and continue stirring for 10-20 minutes until it is completely dissolved to obtain mixture B.

[0038] The specific implementation method is as follows: First, pretreatment is performed: Keratin is pre-dispersed in a polyol mixture of glycerol and butylene glycol at a weight ratio of 1:1, and stirred at 300 rpm for 30 to 40 minutes at 50°C until there are no lumps and a uniform dispersion is formed, which is then set aside; then the pretreated keratin dispersion is slowly added dropwise to mixture A, and after the addition is complete, the mixture is stirred at 300 rpm at 50°C for 20 minutes until the keratin is completely dissolved and the system is uniform and free of particles, resulting in mixture B.

[0039] S3. Cool the mixture B to 35℃~40℃, add the Bifida ferment filtrate, and stir at 100~200rpm for 15~20 minutes to mix evenly to obtain mixture C.

[0040] The specific implementation method is as follows: stop heating the mixture B, allow it to cool naturally or cool it down to 38°C with cooling water; keep the stirring speed at 200 rpm, slowly add the Bifida ferment filtrate, and continue stirring for 15 minutes to obtain the mixture C, ensuring that the mixture is uniform and avoiding high temperature inactivation.

[0041] S4. Adjust the pH of mixture C to 5.0–6.5 with citric acid solution and / or triethanolamine solution, and then homogenize and sterilize to obtain the composition;

[0042] The specific implementation method is as follows: First, pH adjustment is performed: the pH of the system is slowly adjusted to 5.5-6.0 using a 10% citric acid solution or a 10% triethanolamine solution, and the mixture is stirred for 5 minutes and then measured again until the pH is stable; then, volume homogenization is performed: the homogenizer is turned on and homogenized at 2500 rpm for 8 minutes to ensure that the system is fine and uniform; finally, sterilization and filling are performed: sterilization is achieved by filtration through a 0.22μm microporous membrane, and the mixture is filled under aseptic conditions to obtain the scalp care composition;

[0043] After filtration, it can be used as a functional additive in shampoo, and can be directly added to the basic shampoo formula at a ratio of 15% to make shampoo containing ylang-ylang extract.

[0044] Example 2:

[0045] Please see Figure 1 This embodiment provides a technical solution based on Embodiment 1: a scalp care composition containing ylang-ylang extract, the raw materials of which include, by weight: 5 parts ylang-ylang extract, 1.5 parts keratin, 4 parts centella asiatica extract, 0.8 parts allantoin, 5 parts trehalose, 1.2 parts zinc PCA, 8 parts bifida ferment filtrate, 68 parts deionized water, and 2.5 parts butylene glycol.

[0046] Its preparation method specifically includes the following steps:

[0047] S1. Add deionized water to the reaction vessel, turn on the stirrer, set the speed to 300-400 rpm, and heat the water bath to 45°C; then add ylang-ylang extract, centella asiatica extract, allantoin, trehalose, and zinc PCA in sequence, and stir at 45°C for 30 minutes until all solids are completely dissolved and the system is clear and transparent to obtain mixture A.

[0048] S2. First, perform pretreatment: Thoroughly wet and disperse keratin with butylene glycol, and stir at 300 rpm for 30-40 minutes at 45°C to avoid clumping when added directly to water. Stir until a uniform dispersion is formed and set aside. Then, slowly add the pretreated keratin dispersion dropwise to mixture A. After the addition is complete, continue stirring at 45°C and 300 rpm for 20 minutes until the keratin is completely dissolved and the system is uniform and free of particles, thus obtaining mixture B.

[0049] S3. Stop heating mixture B and allow it to cool naturally or with cooling water to 37°C. Keep the stirring speed at 200 rpm and slowly add the Bifida ferment filtrate. Continue stirring for 15 minutes to obtain mixture C. Ensure that the mixture is homogeneous and avoid high-temperature inactivation.

[0050] S4. First, adjust the pH: Use a 10% citric acid solution or a 10% triethanolamine solution to slowly adjust the pH of the system to 5.8-6.2, stir for 5 minutes and repeat the test until the pH is stable; then, perform volume homogenization: turn on the homogenizer and homogenize at 2500 rpm for 5 minutes to ensure the system is fine and uniform; finally, sterilize and fill: use a 0.22μm microporous membrane for sterilization and fill under aseptic conditions to obtain the scalp care composition;

[0051] The composition was added to the scalp spray base formula at a ratio of 15% to create a scalp spray containing ylang-ylang extract.

[0052] Example 3:

[0053] Please see Figure 1 This embodiment provides a technical solution based on Embodiment 1: a scalp care composition containing ylang-ylang extract, the raw materials of which include, by weight: 6 parts ylang-ylang extract, 2.5 parts keratin, 4 parts centella asiatica extract, 1.2 parts allantoin, 5 parts trehalose, 1.5 parts zinc PCA, 10 parts bifida ferment filtrate, 65 parts deionized water, and 5 parts glycerin.

[0054] Its preparation method specifically includes the following steps:

[0055] S1. Add deionized water to the reaction vessel, turn on the stirrer, set the speed to 300-400 rpm, and heat the water bath to 55°C; then add ylang-ylang extract, centella asiatica extract, allantoin, trehalose, and zinc PCA in sequence, and stir at 55°C for 30 minutes until all solids are completely dissolved and the system is clear and transparent to obtain mixture A.

[0056] S2. First, perform pretreatment: Thoroughly wet and disperse keratin with glycerin, and stir at 300 rpm for 30-40 minutes at 55°C to avoid clumping when added directly to water. Stir until a uniform dispersion is formed and set aside. Then, slowly add the pretreated keratin dispersion dropwise to mixture A. After the addition is complete, continue stirring at 55°C and 300 rpm for 20 minutes until the keratin is completely dissolved and the system is uniform and free of particles, thus obtaining mixture B.

[0057] S3. Stop heating mixture B and allow it to cool naturally or with cooling water to 40°C. Keep the stirring speed at 200 rpm and slowly add the Bifida ferment filtrate. Continue stirring for 15 minutes to obtain mixture C. Ensure that the mixture is homogeneous and avoid high-temperature inactivation.

[0058] S4. First, adjust the pH: Use a 10% citric acid solution or a 10% triethanolamine solution to slowly adjust the pH of the system to 5.5-6.5, stir for 5 minutes and repeat the test until the pH is stable; then, perform volume homogenization: turn on the homogenizer and homogenize at 2500 rpm for 5 minutes to ensure the system is fine and uniform; finally, sterilize and fill: use low-temperature pasteurization (≤45℃) for 20 minutes, and fill under aseptic conditions to obtain the scalp care composition;

[0059] The composition was added to the basic formula of the hair serum at a ratio of 10% to obtain a hair serum containing ylang-ylang extract.

[0060] Example 4:

[0061] Efficacy and safety verification:

[0062] (1) Scalp oil control and volume control comparison test:

[0063] Test objective:

[0064] The effects of the scalp care composition of the present invention on inhibiting sebum secretion, improving hair root support, and enhancing visual fullness of oily scalps were verified, and compared with commercially available oil-controlling and volumizing products to clarify the technical advantages of the present invention.

[0065] Test materials:

[0066] Test sample: Shampoo containing ylang-ylang extract prepared in Example 1 of this invention.

[0067] Control sample: Commercially available silicone-free shampoo.

[0068] Testing instruments: scalp oil tester, hair root fluffiness measuring instrument, standard light source evaluation box.

[0069] Test subject:

[0070] Sixty subjects who met the characteristics of "oily and flat scalp" were selected. Inclusion criteria: 18-45 years old, oily scalp, obvious daily oil production, poor hair root support, flat scalp after blow-drying for 2-4 hours, no severe scalp inflammation, no history of allergies, and no use of medicated scalp products or other functional shampoos and conditioners in the past month.

[0071] Test Groups:

[0072] Sixty subjects were randomly divided into a test group and a control group, with 30 people in each group. There were no significant differences between the two groups in terms of age, degree of scalp oiliness, and fineness of hair (P>0.05), and they were comparable.

[0073] Test method:

[0074] Test group: The scalp and hair were cleaned normally with the shampoo containing ylang-ylang extract from Example 1 every day for 28 consecutive days.

[0075] Control group: Used commercially available oil-controlling, volumizing, silicone-free shampoo to clean scalp and hair daily for 28 consecutive days.

[0076] Test time points: Day 0 (baseline), Day 14, Day 28.

[0077] Test metrics:

[0078] Scalp oil secretion rate: The oil reduction rate was calculated by measuring at fixed points using a scalp oil tester.

[0079] Hair root fluffiness angle: The support angle of a single hair root is measured using a hair root fluffiness measuring instrument, and the angle increase is calculated.

[0080] Visual richness: Under standard light, three professional evaluators blindly tested and scored the visual richness, with a maximum score of 10 points. The higher the score, the better the richness.

[0081] The test results are shown in Table 1:

[0082] Table 1

[0083] time Test metrics Test group (this invention) Control group (commercially available products) Comparison of improvement Day 14 Scalp sebum secretion rate Reduced by 38.5% Reduced by 22.1% Significantly better than the control group Day 14 Root volume angle Increased by 24.3° Increased by 12.7° A 91.3% improvement compared to the control group. Day 14 Visual richness (out of 10) 8.2 points 6.5 points 26.2% higher than the control group Day 28 Scalp sebum secretion rate Reduced by 56.2% Reduced by 31.5% Outstanding sustained oil control effect Day 28 Root volume angle Increased by 35.8° Increased by 18.9° An improvement of 89.4% compared to the control group. Day 28 Visual richness (out of 10) 9.1 points 7.2 points It increased by 26.4% compared to the control group.

[0084] As shown in Table 1, the composition of the present invention synergistically regulates the scalp microecology through ylang-ylang extract and bifida ferment filtrate, inhibiting excessive sebum secretion from the source and significantly reducing scalp oil secretion rate; at the same time, under the moisturizing and oil-controlling balancing effect of trehalose and zinc PCA, it avoids the problems of scalp dryness, tightness and oil rebound caused by traditional oil-control products.

[0085] During the testing period, the hair root volume angle of the test group increased by nearly twice that of the control group, and the visual fullness was significantly improved. It can effectively improve limp and flat hair and achieve long-lasting upright hair roots.

[0086] (2) Hair strength test:

[0087] Test objective:

[0088] The effects of the composition of the present invention on improving the tensile strength, reducing the breakage rate, and repairing the hair cuticles of fine and fragile hair were verified. Compared with commercially available strengthening and repairing products, the strengthening and enhancing advantages were clearly demonstrated.

[0089] Test materials:

[0090] Test sample: Hair essence containing ylang-ylang extract prepared in Example 3 of this invention;

[0091] Control sample: Commercially available hair serum.

[0092] Test materials: Human hair bundles of the same source and with the same hair quality (fine, soft, easily broken, and with damaged hair cuticles);

[0093] Testing instruments: electronic monofilament tensile tester, repeated bending tester, scanning electron microscope (SEM).

[0094] Test method:

[0095] Human hair bundles with the same initial state were randomly divided into a test group and a control group, with 10 bundles in each group.

[0096] Test group: Apply the hair essence containing ylang-ylang extract from Example 3 evenly to the hair strands daily, leave for 3 minutes, rinse with water, and air dry. Repeat this treatment for 14 consecutive days.

[0097] Control group: treated with commercially available strengthening and repairing hair serum in the same manner for 14 consecutive days.

[0098] Test metrics:

[0099] Tensile strength of hair strand: measured by a tensile tester, unit cN / tex, and the lift rate is calculated.

[0100] Repeated bending breakage rate: Simulate daily combing and bending, statistically analyze the breakage rate, and calculate the reduction rate.

[0101] Hair cuticle closure: Scanning electron microscopy was used to observe the state of hair cuticle lifting, damage, and closure.

[0102] The test results are shown in Table 2:

[0103] Table 2

[0104] Test Project initial state Test group (this invention) Control group (commercially available products) Tensile strength of hair 32.5 cN / tex 47.8 cN / tex (47.1% improvement) 39.6 cN / tex (21.8% improvement) Repeated bending fracture rate 100% (All are prone to breakage) The fracture rate decreased by 68.5%. The fracture rate decreased by 42.3%. Hair scale closure (electron microscopy) Noticeably warped or damaged Smooth, complete, and tightly closed Partially closed, but still curled up.

[0105] As shown in Table 2, the keratin in the composition of the present invention can directly replenish the structural proteins of the hair shaft, and the zinc PCA strengthens the internal cross-linking of the hair shaft. Combined with the repair-promoting effect of Centella asiatica extract, it achieves triple repair of penetration, filling and closure.

[0106] After treatment, the tensile strength of the hair strands increased by nearly 50%, making them less prone to breakage even after repeated combing. The hair cuticles were restored to a smooth and closed state, and the strengthening effect was significantly better than that of ordinary strengthening and repairing products on the market.

[0107] (3) Stability test:

[0108] Test objective:

[0109] The appearance, pH value, and stability of active ingredients of the composition of the present invention were examined under typical storage and transportation conditions such as high temperature, low temperature, light exposure, and centrifugation to evaluate the feasibility of industrial production and commercialization.

[0110] Test sample

[0111] Sample 1: Shampoo containing ylang-ylang extract prepared in Example 1.

[0112] Sample 2: Hair serum containing ylang-ylang extract prepared in Example 3.

[0113] Test conditions and methods:

[0114] High temperature test: Place at a constant temperature of 40±2℃ and observe for 90 days.

[0115] Low temperature test: Freeze at -10±2℃ for 90 days, and then test the status after returning to room temperature.

[0116] Light exposure test: Placed under a light intensity of 4500±500 Lx and observed for 30 days.

[0117] Centrifugation test: Centrifuge at 3000 rpm for 30 minutes and observe the layering and precipitation.

[0118] Testing indicators: appearance, pH value, and retention rate of active ingredients.

[0119] The test results are shown in Table 3:

[0120] Table 3

[0121] Test conditions Observation time Example 1 (Shampoo containing ylang-ylang extract) Example 3 (Hair serum containing ylang-ylang extract) High temperature (40±2℃) 90 days No stratification, no discoloration, no odor; pH stable at 5.2±0.2; active ingredient retention rate 92%. No stratification, no precipitation, no turbidity; pH ​​stable at 5.5±0.2. Low temperature (-10±2℃) 90 days There were no obvious abnormalities when frozen; after returning to room temperature, the substance was clear and transparent, with no precipitation or flocculent matter. The system was uniform during freezing and became homogeneous after returning to room temperature, with no crystal precipitation. Light intensity (4500±500Lx) 30 days Slight color darkening, no odor or separation; 88% retention of active ingredients. The color showed no significant change, and the system was stable; the active ingredient retention rate was 91%. Centrifugation / No layering, no sediment, no floating oil No stratification, no sedimentation, no flocculation

[0122] As shown in Table 3, the composition of the present invention maintains good stability under forced conditions such as high temperature, low temperature, light, and centrifugation. It has a uniform appearance, stable pH value, and high retention rate of active ingredients, which meets the requirements of industrial production, storage, transportation and long-term use of cosmetics.

[0123] (4) Skin irritation test:

[0124] Test objective:

[0125] The irritant and sensitizing properties of the composition of the present invention on human skin were verified, and the safety of its use on sensitive scalps was confirmed.

[0126] Test subject:

[0127] Thirty participants with sensitive scalps were selected. Inclusion criteria included: scalp prone to redness, itching, and stinging; history of sensitivity to multiple hair care products; no history of contact dermatitis; and no serious systemic diseases.

[0128] Test method:

[0129] The scalp care composition prepared in Example 1 was quantitatively placed in a qualified spot tester, and a blank control group was set up.

[0130] The spot tester is applied to the clean skin on the back of the subject, gently pressed to fix it, and kept for 24 hours.

[0131] After removing the spot tester, skin reactions were observed and recorded at 0h, 24h, and 48h.

[0132] Reaction grading: negative (no erythema / edema), suspicious (mild erythema), positive (obvious erythema / edema / papules).

[0133] The test results are shown in Table 4:

[0134] Observation time Negative reaction (no erythema / edema) Suspicious reaction (mild erythema) Positive reaction (obvious erythema / edema) 0h 30 people (100%) 0 people 0 people 24h 29 people (96.7%) 1 person (3.3%, the case resolved itself without intervention) 0 people 48h 30 people (100%) 0 people 0 people

[0135] As shown in Table 4, the composition of the present invention showed no obvious skin irritation or sensitization in human patch tests. Only one case showed transient mild erythema, which subsided quickly. The overall safety is excellent and it is suitable for long-term use by people with oily, combination, and sensitive scalps.

[0136] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A scalp care composition containing ylang-ylang extract, characterized in that, The raw materials, by weight, include: 1-6 parts ylang-ylang extract, 0.5-3 parts keratin, 0.5-5 parts centella asiatica extract, 0.1-2 parts allantoin, 1-5 parts trehalose, 0.2-2 parts zinc PCA, 2-10 parts bifida ferment filtrate, and 65-80 parts a carrier acceptable for the cosmetics industry.

2. The scalp care composition containing ylang-ylang extract according to claim 1, characterized in that, The weight ratio of the ylang-ylang extract to the bifida ferment filtrate is 1:1 to 1:

3.

3. The scalp care composition containing ylang-ylang extract according to claim 1, characterized in that, The carriers acceptable in the cosmetics field are at least one of deionized water, butylene glycol, and glycerin.

4. The scalp care composition containing ylang-ylang extract according to claim 1, characterized in that, The pH of the composition is 5.0 to 6.5, and the pH is adjusted by using citric acid solution and triethanolamine solution.

5. A method for preparing a scalp care composition containing ylang-ylang extract, characterized in that, It is used to prepare a scalp care composition containing ylang-ylang extract as described in any one of claims 1-4, and the preparation method specifically includes the following steps: S1. Add ylang-ylang extract, centella asiatica extract, allantoin, trehalose, and zinc PCA to deionized water and stir at 200-400 rpm for 30 minutes at 40℃-60℃ until completely dissolved to obtain mixture A. S2. Disperse keratin in glycerol and / or butylene glycol, and stir at 300-400 rpm for 30-40 minutes at 50°C until it is evenly dispersed. Then add it to mixture A and continue stirring for 10-20 minutes until it is completely dissolved to obtain mixture B. S3. Cool the mixture B to 35℃~40℃, add the Bifida ferment filtrate, and stir at 100~200rpm for 15~20 minutes to mix evenly to obtain mixture C. S4. Adjust the pH of mixture C to 5.0–6.5 with citric acid solution and / or triethanolamine solution, and then homogenize and sterilize to obtain the composition.

6. The method for preparing a scalp care composition containing ylang-ylang extract according to claim 5, characterized in that, In step S4, the homogenization process is carried out at 2500 rpm for 5 to 10 minutes, and the sterilization process is carried out by filtration through a 0.22 μm filter membrane or low-temperature pasteurization for 20 minutes.

7. The use of a scalp care composition containing ylang-ylang extract as described in any one of claims 1-4 in the preparation of a scalp care product, characterized in that, The product is at least one of hair serum, spray, shampoo, conditioner, and hair mask.

8. The use of the scalp care composition containing ylang-ylang extract according to claim 7 in the preparation of scalp care products, characterized in that, The composition is added to the product at a rate of 5% to 20%.

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