Natural plant oil composition for repairing damaged hair and use thereof

Abstract

The application belongs to the technical field of hair care, and discloses a natural plant oil composition for repairing damaged hair and application thereof. The natural plant oil composition for repairing damaged hair comprises Lur starfruit palm seed fat, starfruit palm kernel oil and large-lobed alderleaf sycamore seed oil, and the weight ratio of the Lur starfruit palm seed fat, the starfruit palm kernel oil and the large-lobed alderleaf sycamore seed oil is 0.5-2:0.2-1.5:0.1-1. The composition formed by compounding the Lur starfruit palm seed fat, the starfruit palm kernel oil and the large-lobed alderleaf sycamore seed oil can produce a synergistic effect of improving the hair repairing effect of the composition.

Description

Technical Field

[0001] This application relates to the field of hair care technology, specifically to a natural plant oil composition for repairing damaged hair and its application. Background Technology

[0002] Scalp health issues are prevalent in modern life, with over 80% of the population suffering from hair loss, oily skin, and sensitivity. Therefore, hair care is a popular research area for consumer products. Hair repair is a key area of ​​research, as it significantly repairs cuticle damage caused by external factors such as perming, dyeing, and sun exposure, filling gaps in the hair shaft to reduce split ends and breakage. Regular repair also maintains a healthy scalp environment, regulates sebum secretion, and reduces inflammation and the risk of hair loss. Therefore, hair repair is the foundation of hair care.

[0003] As disclosed in prior art 1, Chinese Patent 201810129124.8, is a hair repair and conditioning composition and hair repair and conditioning agent containing fullerene. This hair repair and conditioning composition comprises the following components in parts by weight: 2-9 parts D-panthenol, 7-15 parts allantoin, 10-15 parts zinc pyrithione, 5-20 parts water-soluble fullerene raw material, 5-20 parts ginseng extract, 0.4-0.8 parts phenoxyethanol, 20-30 parts water, and 10-30 parts surfactant; wherein the water-soluble fullerene raw material is a dispersion formed by dispersing fullerene in a solubilizer, and the concentration of fullerene in the water-soluble fullerene raw material is 0.1-3 mg / ml. This hair repair and conditioning composition, through the combination of fullerene and a specific ratio of D-panthenol, allantoin, and zinc pyrithione, achieves a synergistic effect of oil control, moisturizing, dandruff removal, itch relief, and hair smoothing.

[0004] This existing technology 1 achieves multifaceted hair repair and conditioning effects through a combination of multiple components, which is a technology worth learning from. However, it does not provide a deep, singular enhancement of hair repair efficacy. Based on the development of the consumer goods market, single-function enhanced consumer products are increasingly favored by consumers. Therefore, there is a need to find a hair care composition that deeply enhances hair repair efficacy to meet consumer demand. Summary of the Invention

[0005] One of the purposes of this application is to provide a natural plant oil composition for repairing damaged hair, which, through the combination of stellaria nut oil, stellaria kernel oil and alder seed oil, can synergistically enhance the hair repair efficacy of the composition, thereby meeting consumers' demand for a deeper enhancement of hair repair efficacy.

[0006] Another objective of this application is to provide an application of a natural plant oil composition for repairing damaged hair. The natural plant oil composition for repairing damaged hair of this application can be used to prepare hair care products, and can exert excellent hair repair effects.

[0007] To achieve the above objectives, this application provides a natural plant oil composition for repairing damaged hair, comprising mulberry palm seed oil, mulberry palm kernel oil, and alder seed oil, wherein the weight ratio of mulberry palm seed oil, mulberry palm kernel oil, and alder seed oil is 0.5-2:0.2-1.5:0.1-1.

[0008] Preferably, the above-mentioned natural plant oil composition for repairing damaged hair also includes a protein component, wherein the protein component is at least one of hydrolyzed keratin, hydrolyzed collagen, hydrolyzed silk, hydrolyzed rice protein, hydrolyzed pea protein, hydrolyzed soy protein, and hydrolyzed wheat protein.

[0009] More preferably, the weight ratio of the protein component to the mulberry seed oil is 0.05-0.2:1-4.

[0010] This application also provides a natural plant oil composition for repairing damaged hair, consisting of mulberry palm seed oil, alder seed oil, and hydrolyzed silk.

[0011] This application found through experiments that when using a combination of stellaria nut oil, alder seed oil, and hydrolyzed silk, the synergistic effect of the three components in enhancing the hair repair efficacy of the composition can be maximized. Compared with technical solutions that add stellaria nut oil or replace hydrolyzed keratin with other proteins, the hair repair effect is significantly improved.

[0012] Preferably, the weight ratio of mulberry seed oil, alder seed oil, and hydrolyzed silk is 0.5-2:0.1-1:0.025-0.1.

[0013] This application also provides an application of the above-mentioned natural plant oil composition for repairing damaged hair, used in the preparation of shampoo and conditioner products.

[0014] Beneficial effects

[0015] Compared with the prior art, this application has at least the following advantages:

[0016] The composition formed by the compounding of mulberry seed oil, mulberry kernel oil and alder seed oil can produce a synergistic effect to enhance the hair repair efficacy of the composition. Detailed Implementation

[0017] The present application will be further described below with reference to embodiments, but this does not constitute any limitation on the present application. Any limited modifications made within the scope of the claims of the present application shall still be within the scope of the claims of the present application.

[0018] To illustrate the technical content of this application in detail, the following description is provided in conjunction with the embodiments.

[0019] In the following examples and comparative examples, the *Symplocos molluscica* seed oil was purchased from Clariant Chemicals (Shanghai) Co., Ltd., and contains 99.95% *Symplocos molluscica* seed oil and 0.05% tocopherol; the *Symplocos molluscica* kernel oil was purchased from Clariant Chemicals (Shanghai) Co., Ltd., and contains 99.95% *Symplocos molluscica* kernel oil and 0.05% tocopherol; the *Alnus macrocarpa* seed oil was purchased from Clariant Chemicals (Shanghai) Co., Ltd., and contains 99.95% *Alnus macrocarpa* seed oil and 0.05% tocopherol; the hydrolyzed keratin... The following materials were purchased from Jiangsu Ruiting Biotechnology Co., Ltd.: hydrolyzed keratin, 89% water, 5% butylene glycol, and 1% phenoxyethanol; hydrolyzed collagen, also purchased from Jiangsu Ruiting Biotechnology Co., Ltd., contains 5% hydrolyzed collagen, 89% water, 5% butylene glycol, and 1% phenoxyethanol; hydrolyzed silk, also purchased from Jiangsu Ruiting Biotechnology Co., Ltd., contains 5% hydrolyzed silk, 89% water, 5% butylene glycol, and 1% phenoxyethanol; and the thickener, hydroxypropyl starch phosphate, was purchased from Guangzhou Baihaobo Co., Ltd.

[0020] Unless otherwise specified, in the following examples and comparative examples, the parts refer to parts by weight, and the percentage refers to weight percentage.

[0021] Prepare the hair care composition according to the formula in Table 1. The preparation method is as follows:

[0022] Step 1: Mix deionized water and thickener evenly, heat to 72±2℃, homogenize at 6000rpm for 5min until there are no obvious lumps;

[0023] Step 2: Stir and cool to 65℃, add the corresponding active oils (Mulu Star Fruit Palm Seed Oil, Star Fruit Palm Kernel Oil, and Large-leaf Alder Seed Oil), stir at 800rpm for 15min until the mixture is evenly mixed and there are no obvious oil droplets on the surface.

[0024] Step 3: Stir and cool to 45℃, add the corresponding protein components (hydrolyzed keratin, hydrolyzed collagen, hydrolyzed silk), continue stirring until evenly mixed, stop stirring after cooling to room temperature, and discharge the material.

[0025] It should be noted that the water and thickener in the formula are for stabilizing the properties of the composition and are not active substances. Those skilled in the art can reduce or adjust them as needed.

[0026] It should be noted that the dosages listed in the following formula table are the dosages of raw materials. For example, in Example 1 of Table 1, the content of mulberry seed oil is 0.5%, but the actual content of the active ingredient mulberry seed oil is 0.5% * 99.95% = 0.49975%.

[0027] Table 1 Hair care composition formulation table

[0028] Mulu star fruit palm seed oil (%) Star fruit palm kernel oil (%) Large-leaf Alder Seed Oil (%) Hydrolyzed keratin (%) Hydrolyzed collagen (%) Hydrolyzed silk (%) Thickener - Hydroxypropyl starch phosphate (%) water Example 1 0.5 1.5 1 0 0 0 8 To100 Example 2 1 0.8 0.5 0 0 0 8 To100 Example 3 2 0.2 0.1 0 0 0 8 To100 Example 4 1 0.8 0.5 1 0 0 8 To100 Example 5 1 0.8 0.5 0 1 0 8 To100 Example 6 1 0.8 0.5 0 0 1 8 To100 Example 7 1 0.8 0.5 0.5 0 0 8 To100 Example 8 1.7 0 0.6 0 0 1 8 To100 Comparative Example 1 1.7 0 0.6 0 0 0 8 To100 Comparative Example 2 0 1.4 0.9 0 0 0 8 To100 Comparative Example 3 1.3 1 0 0 0 0 8 To100 Comparative Example 4 1.7 0 0.6 1 0 0 8 To100 Comparative Example 5 1.7 0 0.6 0 1 0 8 To100 Comparative Example 6 0 1.4 0.9 0 0 1 8 To100 Comparative Example 7 1.3 1 0 0 0 1 8 To100

[0029] Efficacy testing

[0030] Hair repair effects

[0031] I. Hair strand pretreatment

[0032] The experiment was conducted at a temperature of (25±2)℃ and a RH of (50±5)%. Human hair strands with a length of 40±0.5cm, a width of 10±0.2cm, and a weight of 25±1g were selected for damage pretreatment. A mixed aqueous solution of 1% hydrogen peroxide and 1% ammonia was prepared in real time. The cleaned hair strands were placed in beakers, and the mixed aqueous solution was added to completely submerge the hair. The strands were wrapped in plastic wrap and placed in an electric thermostatic water bath at (40.0±1.0)℃ for 2 hours (turned over after 1 hour). The hair strands were then removed, rinsed thoroughly with clean water, neutralized with 10g / L anhydrous citric acid for 5 minutes, and then gently combed neatly. The hair strands were then hung in a constant temperature and humidity chamber for 24 hours.

[0033] Damaged hair sections were immersed in a 5 g / L sodium dodecyl sulfate solution and bathed in a constant temperature water bath at (40.0 ± 1.0) ℃ for 30 min, then rinsed thoroughly with clean water. The detached hair strands were gently combed 5 times with a comb and hung in a constant temperature and humidity room for 24 h to air dry naturally. The hair sections were then weighed again, numbered, and hair strands with a weight deviation of ±0.3 g were randomly grouped, with 5 parallel groups for each sample.

[0034] II. Sample Processing

[0035] Take the hair care compositions (0.3 mL / g hair strand) provided in Examples 1-8 and Comparative Examples 1-7 respectively, and apply them evenly from root to tip to the treated hair strands. Gently massage and rub with your fingers to ensure that each hair strand is immersed in the composition. Hang the hair strands in a constant temperature and humidity room for 1 hour. After immersion, rinse and rub the hair strands with warm water at (37.0±1.0)℃ and a flow rate of 4L / min for 2 minutes. Gently comb the wet hair strands and hang them in a constant temperature and humidity room for 24 hours.

[0036] III. Test Items

[0037] 1. Combing power test

[0038] Hair combing force refers to the mechanical resistance that hair exerts on a comb when combing a section of hair. This force is the result of multiple factors, and its magnitude directly reflects the smoothness, softness, and anti-tangling ability of the hair. Factors affecting the combability of a single hair include the coefficient of friction between hair fibers and between hair fibers and the comb, hair diameter, hair rigidity, and the presence of static charge. Combing force is an objective indicator for quantifying the effectiveness of hair repair. Damaged hair cuticles drastically increase the friction between hair strands and between hair strands and the comb, making them more prone to snagging and forming knots that are difficult to untangle. At the same time, damaged cuticles cannot retain moisture, making the hair dry, stiff, and inelastic, further increasing the resistance during combing.

[0039] The hair combing force tester was used to test the friction force of the hair strands before and after using the sample. Each hair strand was tested 7 times. The combing force curve was obtained by data processing. The combing force of the hair strand was obtained by integrating the combing force curve. The average combing force of each hair strand was calculated. The hair strand combing force reduction rate = (average combing force of hair strand before using the sample - average combing force of hair strand after using the sample) / average combing force of hair strand before using the sample × 100%. The larger the value, the better the effect of reducing the hair strand combing force after using the sample, the better the effect of reducing hair strand friction, and the better the sample repair effect.

[0040] Hair strands using the hair care compositions provided in Examples 1-8 and Comparative Examples 1-7 were tested according to the above test methods, and the results are shown in Table 2.

[0041] Table 2. Hair combing power test results of hair care compositions in Examples 1-8 and Comparative Examples 1-7

[0042] Average combing effort of the sample's front hair strand / mJ Average combing effort of hair strands after using the sample / mJ Change rate of combing work (%) Example 1 792 433 45.33 Example 2 785 487 37.96 Example 3 826 477 42.25 Example 4 786 331 57.89 Example 5 832 435 47.72 Example 6 769 386 49.80 Example 7 791 425 46.27 Example 8 773 356 53.95 Comparative Example 1 813 609 25.09 Comparative Example 2 824 645 21.72 Comparative Example 3 798 611 23.43 Comparative Example 4 822 586 28.71 Comparative Example 5 831 603 27.44 Comparative Example 6 837 589 29.63 Comparative Example 7 787 544 30.88

[0043] According to the results in Table 2:

[0044] According to the data from Examples 1-3, this application can effectively reduce hair combing effort by combining the three components of stellaria nutta seed oil, stellaria nut kernel oil, and alder seed oil, thereby improving hair repair effect; the changes in the amount of the components in Examples 1-3 will also lead to a certain degree of difference in the rate of change of combing effort.

[0045] Based on the data comparison between Example 2 and Comparative Examples 1-3, it can be seen that when Comparative Examples 1-3 use any two of the following: mulberry seed oil, mulberry kernel oil, and alder seed oil, although the total content is the same as in Example 2, the increase in the rate of change in hair combing power is significantly different from that in Example 2. Therefore, it can be inferred that this application produces a synergistic effect of increasing the rate of change in hair combing power by combining mulberry seed oil, mulberry kernel oil, and alder seed oil.

[0046] According to the data from Examples 4-6 combined with the data from Example 2, this application adds protein components to the compound of stellaria nut oil, stellaria nut kernel oil, and alder seed oil, which can further significantly improve the combing efficiency of the composition. It is speculated that the reason is that the compound of oil and protein components effectively forms a protective film on the hair while effectively filling the gaps between the hair cuticles and significantly reducing the coefficient of friction. Among them, the most obvious improvement is in hydrolyzed keratin, followed by hydrolyzed silk, and then hydrolyzed collagen.

[0047] Based on the data from Example 7, it was found that when the amount of hydrolyzed keratin decreased significantly, the rate of change in combing power also decreased significantly. It is speculated that the arugula seed oil, arugula kernel oil, and alder seed oil did not synergistically enhance the rate of change in combing power of the composition with hydrolyzed keratin. The increased rate of change in combing power shown in Examples 4 and 7 was based on the effect of hydrolyzed keratin itself.

[0048] Unlike Example 6, Example 8 removed the star palm kernel oil and increased its amount to the star palm seed oil and alder seed oil, then compounded it with hydrolyzed silk. It was found that Example 8 significantly improved the rate of change in hair combing performance. Based on the data from Comparative Example 1, the possible reason is:

[0049] (1) Star fruit palm kernel oil and hydrolyzed silk produced a certain degree of antagonism;

[0050] (2) The combination of mulberry seed oil, alder seed oil and hydrolyzed silk produced a synergistic effect.

[0051] Based on the data from Example 6, Comparative Example 1, and Comparative Examples 4-7, it can be determined that among the two reasons above, (1) is unlikely. It is speculated that the synergistic effect is produced when the three are combined: mulberry seed oil, alder seed oil, and hydrolyzed silk. However, Example 8 improved the synergistic effect of the three by increasing the content of mulberry seed oil and alder seed oil, thereby improving the hair combing efficiency change rate. At the same time, it is determined that the combination of mulberry seed oil, alder seed oil, and hydrolyzed keratin or hydrolyzed collagen did not produce a synergistic effect in improving the hair combing efficiency change rate.

[0052] 2. Tensile strength test

[0053] Tensile strength of hair refers to the maximum stress a single hair fiber can withstand when stretched until it breaks. It reflects the absolute strength or resilience of the hair. Higher tensile strength indicates stronger hair, less prone to breakage, and is a core indicator of hair health and damage. Yield point tensile strength refers to the tensile force or stress that hair withstands when transitioning from elastic deformation to plastic deformation (yield point). It reflects the hair's stiffness and ability to resist initial deformation. Higher yield point tensile / stress means greater force is required for permanent deformation, making the hair more resilient. Damage to the hair cuticle exposes the inner cortex, leading to rapid loss of moisture and protein, making the hair structure fragile, weak, and prone to breakage.

[0054] The ability of hair samples to strengthen and protect hair was evaluated by testing the changes in tensile strength and yield zone tensile force of hair strands before and after use. Before testing, the diameter of each hair strand was measured using an SN-1200W high-definition camera. From each strand, 20 hair strands with a diameter difference within 15μm (75-90μm) were selected for single-fiber strength testing using a fiber strength tester. Based on the obtained data, the average breaking strength (MPa) and average yield zone tensile force (MPa) of the hair before and after use were calculated. The rate of change in breaking strength was calculated as follows: (Average breaking strength after use - Average breaking strength before use) / Average breaking strength before use × 100%. The rate of change in yield zone tensile force was calculated as follows: (Average yield zone tensile force after use - Average yield zone tensile force before use) / Average yield zone tensile force before use × 100%. Higher rates of change in breaking strength and yield zone tensile force indicate better repair and strengthening effects on the hair.

[0055] Hair strands using the hair care compositions provided in Examples 1-8 and Comparative Examples 1-7 were tested according to the above test methods, and the results are shown in Tables 3 and 4.

[0056] Table 3. Breaking strength test results of hair care compositions in Examples 1-8 and Comparative Examples 1-7

[0057] Average breaking strength of the sample's front hair bundle / MPa Average breaking strength of hair strand after sample application / MPa Fracture strength change rate (%) Example 1 189.63 220.86 16.47 Example 2 190.15 219.35 15.36 Example 3 187.42 218.15 16.40 Example 4 189.30 236.52 24.94 Example 5 191.34 225.74 17.98 Example 6 193.41 229.83 18.83 Example 7 188.95 221.74 17.35 Example 8 189.74 211.73 11.59 Comparative Example 1 194.30 211.82 9.02 Comparative Example 2 188.47 203.87 8.17 Comparative Example 3 192.76 208.65 8.24 Comparative Example 4 192.33 215.89 12.25 Comparative Example 5 190.81 211.87 11.04 Comparative Example 6 187.97 210.43 11.95 Comparative Example 7 189.66 214.31 13.00

[0058] According to the results in Table 3:

[0059] According to the data from Examples 1-3, this application can effectively improve the breaking strength by combining the three components of stellaria nutta seed oil, stellaria nut kernel oil, and alder seed oil, thereby improving the hair repair effect. The changes in the amount of the components in Examples 1-3 will also lead to a certain degree of difference in the rate of change of breaking strength, but unlike the combing force test, the change is weak.

[0060] Based on the data comparison between Example 2 and Comparative Examples 1-3, it can be seen that when Comparative Examples 1-3 use any two of the following: mulberry seed oil, mulberry kernel oil, and alder seed oil, although the total content is the same as in Example 2, the increase in the rate of change of breaking strength is significantly different from that in Example 2. Therefore, it can be inferred that this application produces a synergistic effect of improving the breaking strength of hair by combining mulberry seed oil, mulberry kernel oil, and alder seed oil.

[0061] Based on the data from Examples 4-6 and Example 2, it can be seen that the addition of protein components to the compound of sambar palm seed oil, sambar palm kernel oil, and alder seed oil can further significantly improve the tensile strength of the composition. It is speculated that this is because the combination of oil and protein components effectively penetrates the hair core to fill the voids caused by perming, dyeing, or damage, and directly enhances the integrity of the protein chains inside the hair by supplementing key amino acids such as cysteine. The most significant improvement is seen in hydrolyzed keratin, followed by hydrolyzed silk, and then hydrolyzed collagen.

[0062] Based on the data from Example 7, it was found that when the amount of hydrolyzed keratin decreased significantly, the rate of change in hair breakage strength also decreased significantly. It is speculated that the stellaria nut oil, stellaria nut kernel oil, and alder seed oil did not synergistically enhance the rate of change in hair breakage strength of the composition with hydrolyzed keratin. The improved combing performance rate shown in Examples 4 and 7 was based on the effect of hydrolyzed keratin itself.

[0063] Unlike the combing force test, Example 8 showed a significant decrease in the rate of change of breaking strength compared to Example 6. Based on the data from Comparative Examples 1-7, it can be inferred that the significant improvement in hair breaking strength by the composition is based on the synergistic effect of the combination of arugula seed oil, arugula kernel oil, and alder seed oil.

[0064] Table 4. Yield zone tensile test results of hair care compositions in Examples 1-8 and Comparative Examples 1-7

[0065] Average yield zone tension of the sample hair bundle / MPa Average yield zone tensile force of hair strand after sample application / MPa Yield zone tensile force change rate (%) Example 1 103.56 110.79 6.98 Example 2 103.82 110.47 6.41 Example 3 105.12 112.03 6.57 Example 4 104.83 116.32 10.96 Example 5 103.94 111.92 7.68 Example 6 105.67 114.33 8.20 Example 7 104.28 112.17 7.57 Example 8 103.73 108.64 4.73 Comparative Example 1 105.40 109.76 4.14 Comparative Example 2 104.21 107.65 3.30 Comparative Example 3 103.64 107.43 3.66 Comparative Example 4 103.82 109.56 5.53 Comparative Example 5 105.13 110.46 5.07 Comparative Example 6 105.47 110.97 5.21 Comparative Example 7 104.80 110.67 5.60

[0066] According to the results in Table 4:

[0067] According to the data from Examples 1-3, this application can effectively improve the tensile strength of the yield zone by combining the three components of stellium palm seed oil, stellium palm kernel oil, and alder seed oil, thereby improving the hair repair effect. The changes in the dosage of the components in Examples 1-3 will also lead to a certain degree of difference in the rate of change of tensile strength in the yield zone, but unlike the combing force test, the change is relatively weak.

[0068] Based on the data comparison between Example 2 and Comparative Examples 1-3, it can be seen that when Comparative Examples 1-3 use any two of the following: mulberry seed oil, mulberry kernel oil, and alder seed oil, although the total content is the same as in Example 2, the increase in the yield zone tensile strength is significantly different from that in Example 2. Therefore, it can be inferred that this application produces a synergistic effect of increasing the yield zone tensile strength of hair through the combination of mulberry seed oil, mulberry kernel oil, and alder seed oil.

[0069] Based on the data from Examples 4-6 combined with the data from Example 2, it can be seen that the addition of protein components to the compound of sambar palm seed oil, sambar palm kernel oil, and alder seed oil can further significantly improve the yield zone tensile strength of the composition. It is speculated that this is because the combination of oil and protein components effectively penetrates the hair core to fill the voids caused by perming, dyeing, or damage, and directly enhances the integrity of the protein chains inside the hair by supplementing key amino acids such as cysteine. Among them, the most significant improvement is seen in hydrolyzed keratin, followed by hydrolyzed silk, and then hydrolyzed collagen.

[0070] Based on the data from Example 7, it was found that when the amount of hydrolyzed keratin decreased significantly, the change rate of the yield zone tensile strength also decreased significantly. It is speculated that the stellaria nut oil, stellaria nut kernel oil, and alder seed oil did not form a synergistic effect with hydrolyzed keratin to enhance the hair yield zone tensile strength of the composition. The increased combing power change rate shown in Examples 4 and 7 was based on the effect of hydrolyzed keratin itself.

[0071] Unlike the combing force test, Example 8 showed a significant decrease in the rate of change of yield zone tension compared to Example 6. Based on the data from Comparative Examples 1-7, it can be inferred that the significant improvement of the hair yield zone tension by the composition is based on the synergistic effect of the combination of mulberry seed oil, mulberry kernel oil, and alder seed oil.

[0072] 3. Secondary moisture evaporation

[0073] Moisture content is one of the important properties of hair. Based on the different binding forces between water molecules and hair, the water in hair can be divided into weakly bound water (or free water) and strongly bound water (or bound water). Free water is water molecules that are physically attached to the surface of the hair, between the cuticles, or in the tiny pores inside the hair. It is greatly affected by the ambient humidity and is easily lost into the air through evaporation. Strongly bound water is bound to proteins and lipids in the hair through hydrogen bonds, which can maintain the elasticity and resilience of the hair. It is relatively less affected by the ambient humidity and requires more energy (such as heat) to evaporate or detach from the hair.

[0074] The moisturizing effect of the hair sample was evaluated by measuring the rate of change in secondary moisture evaporation before and after sample application. 0.5g (M0) of hair was taken from each hair bundle and cut into 2cm segments. An electronic moisture meter was used to measure the change in mass under heating conditions. The test conditions were: heating to 65℃ at a rate of 10℃ / min and holding for 30min (simulating heat damage from a hair dryer). The hair mass M1 after the first evaporation was recorded. Then, the temperature was increased to 180℃ at a rate of 10℃ / min and held for 30min to evaporate all remaining moisture from the hair. The hair mass M2 after the second evaporation was recorded. The change in the percentage of secondary moisture evaporation before and after sample application was calculated. Percentage of secondary moisture evaporation (%) = (M1 - M2) / M0 × 100%; Rate of change in secondary moisture evaporation = [Percentage of secondary moisture evaporation after sample application (%) - Percentage of secondary moisture evaporation before sample application (%)] / Percentage of secondary moisture evaporation before sample application (%) × 100%.

[0075] The hair strands using the hair care compositions provided in Examples 1-8 and Comparative Examples 1-7 were tested according to the above test methods, and the results are shown in Table 5.

[0076] Table 5. Results of secondary moisture evaporation test of hair care compositions in Examples 1-8 and Comparative Examples 1-7

[0077] Percentage of hair strands with secondary moisture evaporation before sample use (%) Percentage of hair strands with secondary moisture evaporation after sample application (%) Change rate of the proportion of secondary moisture evaporation (%) Example 1 4.05 4.58 13.09 Example 2 4.12 4.63 12.38 Example 3 3.98 4.49 12.81 Example 4 4.06 5.08 25.12 Example 5 4.08 4.71 15.44 Example 6 3.91 4.56 16.62 Example 7 4.09 5.00 22.25 Example 8 4.11 4.58 11.44 Comparative Example 1 3.96 4.21 6.31 Comparative Example 2 3.90 4.10 5.13 Comparative Example 3 4.07 4.31 5.90 Comparative Example 4 4.12 4.58 11.17 Comparative Example 5 4.15 4.56 9.88 Comparative Example 6 3.97 4.39 10.58 Comparative Example 7 3.94 4.41 11.93

[0078] According to the results in Table 5:

[0079] According to the data from Examples 1-3, this application can effectively enhance the water-locking ability by combining the three components of stellaria nutta seed oil, stellaria nut kernel oil, and alder seed oil, thereby improving the water-locking and moisturizing effect on hair. The changes in the amount of the components in Examples 1-3 will also lead to certain differences in the rate of change of water-locking and moisturizing effect.

[0080] Based on the data comparison between Example 2 and Comparative Examples 1-3, it can be seen that when Comparative Examples 1-3 use any two of the following: mulberry seed oil, mulberry kernel oil, and alder seed oil, although the total content is the same as in Example 2, the rate of increase in the percentage change of secondary water evaporation content is significantly different from that in Example 2. Therefore, it can be inferred that this application produces a synergistic effect of enhancing the hair's water-locking and moisturizing ability through the combination of mulberry seed oil, mulberry kernel oil, and alder seed oil.

[0081] According to the data from Examples 4-6 combined with the data from Example 2, this application adds protein components to the compound of mulberry seed oil, mulberry kernel oil, and alder seed oil, which can further and significantly improve the water-locking and moisturizing ability of the composition. The most significant improvement is seen in hydrolyzed keratin, followed by hydrolyzed silk, and then hydrolyzed collagen.

[0082] However, unlike the combing force test and tensile strength test, although the content of hydrolyzed keratin was significantly reduced in Example 7, its water-locking and moisturizing ability did not decrease by much, and was even higher than that of Examples 5 and 6. It is speculated that the synergistic effect of mulberry seed oil, mulberry kernel oil, alder seed oil and hydrolyzed keratin produced a further synergistic effect; and combined with the data of Comparative Example 4, it can be determined that this synergistic effect is based on the compounding of mulberry seed oil, mulberry kernel oil and alder seed oil.

[0083] Unlike the combing force test, Example 8 showed a significant decrease in water-locking and moisturizing ability compared to Example 6. Based on the data from Comparative Examples 1-7, it can be inferred that the significant improvement in the water-locking and moisturizing ability of the composition is based on the synergistic effect of the combination of arugula seed oil, arugula kernel oil, and alder seed oil.

[0084] Product Example

[0085] According to the formula in Table 6, a hair conditioner is prepared as follows:

[0086] 1. Mix the A1 phase deionized water and thickener evenly, stir and heat to 82±2℃, homogenize for 5 minutes until evenly dispersed and without obvious lumps;

[0087] 2. Add the A2 phase raw material, keep warm and stir for 20 minutes until there are no obvious particles;

[0088] 3. Stir and cool to 65°C, add the B-phase raw material preheated to 65°C, and homogenize for 3 minutes;

[0089] 4. Stir and cool to 45℃, then add the C and D phase raw materials in sequence and stir until homogeneous;

[0090] 5. Continue stirring until cooled to room temperature, then measure the physicochemical properties and discharge the material.

[0091] Table 6 Conditioner Formula Table

[0092]

[0093] The embodiments presented herein are merely selected implementations based on combinations of all possible embodiments. The appended claims should not be limited to the embodiments described herein. Some numerical ranges used in the claims include sub-ranges within them, and variations within these ranges should also be covered by the appended claims.

Claims

1. A natural plant oil composition for repairing damaged hair, characterized in that, It includes mulberry seed oil, mulberry kernel oil and alder seed oil, wherein the weight ratio of mulberry seed oil, mulberry kernel oil and alder seed oil is 0.5-2:0.2-1.5:0.1-1.

2. The natural plant oil composition for repairing damaged hair according to claim 1, characterized in that, It also includes protein components, wherein the protein components are at least one of hydrolyzed keratin, hydrolyzed collagen, hydrolyzed silk, hydrolyzed rice protein, hydrolyzed pea protein, hydrolyzed soybean protein, and hydrolyzed wheat protein.

3. The natural plant oil composition for repairing damaged hair according to claim 2, characterized in that, The weight ratio of the protein component to the mulberry seed oil is 0.05-0.2:1-4.

4. A natural plant oil composition for repairing damaged hair, characterized in that, It is composed of mulberry seed oil, alder seed oil and hydrolyzed silk; the weight ratio of mulberry seed oil, alder seed oil and hydrolyzed silk is 1.7:0.6:

1.

5. The application of a natural plant oil composition for repairing damaged hair as described in any one of claims 1-4, characterized in that, It is used in the preparation of washing and care products.

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