A soothing essential oil composition and a method of making the same

Abstract

The application discloses a soothing essential oil composition and a preparation method thereof, and belongs to the field of daily chemical products. The soothing essential oil composition comprises zedoary essential oil, thuja essential oil, pine red plum essential oil and honeysuckle essential oil, wherein the pine red plum essential oil and the zedoary essential oil are prepared by a special preparation method. The soothing essential oil composition provided by the application is of pure natural plant origin, meets the preference of consumers for natural products, and has significant soothing and mosquito-repelling effects.

Description

Technical Field

[0001] This invention belongs to the field of daily chemical products, and specifically relates to a soothing essential oil composition and its preparation method. Background Technology

[0002] The demand for natural plant essential oils in the current daily chemical product industry is growing, with consumers preferring products that are purely natural, non-irritating, and offer multiple benefits. While existing technologies using single essential oils offer some soothing or mosquito-repelling effects, they have the following limitations:

[0003] Single function: Most essential oils only have a single function (such as soothing or mosquito repellent), lacking synergistic effects and unable to meet comprehensive needs.

[0004] Defects in the preparation process: The traditional steam distillation method for extracting essential oils results in low retention of active ingredients, significant loss of heat-sensitive components, and weak efficacy.

[0005] Short-lasting mosquito repellent effect: Single plant essential oils have a relatively short effective time in repelling mosquitoes.

[0006] Dependence on chemical additives: Synthetic mosquito repellent ingredients (such as DEET) may cause skin irritation.

[0007] Therefore, there is an urgent need to develop a pure, natural, multi-functional, synergistic essential oil compound composition with a simple preparation process. Summary of the Invention

[0008] This invention provides a soothing essential oil composition and its preparation method, which uses natural plant-extracted ingredients to achieve soothing and mosquito-repelling effects.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] In a first aspect, the present invention provides a soothing essential oil composition comprising, by weight, the following raw materials:

[0011] 6-8 parts of turmeric essential oil;

[0012] 1-3 parts of cypress essential oil;

[0013] 2-4 parts of pine needle plum essential oil;

[0014] 3-5 parts Vitex essential oil;

[0015] The preparation method of the Curcuma zedoaria essential oil includes the following steps:

[0016] S1: Grind the turmeric and pass it through an 80-100 mesh sieve to obtain turmeric powder;

[0017] S2: Place the turmeric powder in a reaction vessel for supercritical CO2 extraction to obtain turmeric essential oil; wherein the extraction temperature is 40-45℃, the extraction time is 3-5h, the extraction pressure is 30-35MPa, and the CO2 flow rate is 11-13L / h.

[0018] The preparation method of the pine sap essential oil includes the following steps:

[0019] S1: Wash the leaves of Pine Blossom, freeze-dry them, grind them in a grinder, and pass them through an 80-100 mesh sieve to obtain Pine Blossom leaf powder;

[0020] S2: Place the powdered leaves of *Pinus sylvestris* in a reaction vessel and extract with supercritical CO2 to obtain *Pinus sylvestris* essential oil; wherein the extraction temperature is 30-35℃, the extraction time is 1-3h, the extraction pressure is 20-24MPa, and the CO2 flow rate is 10-12L / h.

[0021] Preferably, the soothing essential oil comprises the following raw materials in parts by weight:

[0022] Curcuma zedoaria essential oil 6.5-7.5 parts;

[0023] 1.5-2.5 parts of cypress essential oil;

[0024] Pine and red plum essential oil, 2.5-3.5 parts;

[0025] Vitex essential oil 3.5-4.5 parts.

[0026] Furthermore, the soothing essential oil comprises the following raw materials in parts by weight:

[0027] 7 parts of Curcuma zedoaria essential oil;

[0028] Two parts of cypress essential oil;

[0029] 3 parts of pine needle plum essential oil;

[0030] Four parts Vitex negundo essential oil.

[0031] The present invention also provides the use of the soothing essential oil composition described in the first aspect in the preparation of topical skin products with soothing effects.

[0032] Specifically, the soothing essential oil composition is added in the soothing topical skin product at a ratio of 5-10 wt%.

[0033] Furthermore, the soothing topical skin product also includes a fragrance oil, which is at least one of lemon essential oil and sweet orange essential oil.

[0034] Furthermore, the soothing topical skin product also includes a solvent, the solvent being a base oil, and the base oil being at least one of rapeseed oil, peanut oil, flaxseed oil, sunflower seed oil, jojoba oil, coconut oil, sweet almond oil, and palm oil.

[0035] The present invention also provides the use of the soothing essential oil composition described in the first aspect in the preparation of topical skin products with mosquito-repellent effects.

[0036] Specifically, the proportion of the soothing essential oil composition added to the aforementioned topical skin product with mosquito-repellent effect is 20-30 wt%.

[0037] Furthermore, the skin product with mosquito-repellent effect also includes a solvent, which is a solution of water and ethanol in any mass or volume ratio.

[0038] Further, the solvent is a 10-30 wt% ethanol-water solution.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] The soothing essential oil composition provided by this invention is obtained by blending turmeric essential oil, cypress essential oil, pine syrup essential oil and vitex essential oil in a specific ratio, resulting in a soothing essential oil with significant soothing and mosquito-repelling effects.

[0041] Among them, Curcuma zedoaria essential oil and Pineapple essential oil are extracted using a specific extraction method. Compared with essential oils extracted by traditional distillation, the extracted essential oils have better soothing and mosquito-repelling effects. This may be because the supercritical extraction process retains the heat-sensitive components in the essential oils, some of which have better soothing and mosquito-repelling effects.

[0042] This product relies on pure plant extracts to soothe and repel mosquitoes, and when combined with other ingredients, it has a synergistic effect, satisfying consumers' preference for all-natural products. Detailed Implementation

[0043] To better understand the present invention, the present invention will be further described below with reference to specific embodiments. The terminology used in the embodiments is for describing specific implementation schemes and does not constitute a limitation on the scope of protection of the present invention.

[0044] Unless otherwise specified, experimental methods in the following examples are generally performed under standard conditions or as recommended by the manufacturer. Percentages and parts are by weight unless otherwise stated.

[0045] The sources of some of the raw materials involved in this invention are as follows:

[0046] Curcuma zedoaria was purchased from Bozhou Bailintang Pharmaceutical Co., Ltd.

[0047] The cypress essential oil was purchased from Jiangxi Yuanshangcao Fragrance Co., Ltd.

[0048] The leaves of the pine-red plum came from the South China Botanical Garden in Guangzhou.

[0049] Vitex essential oil was purchased from Guangzhou Penglong Chemical Co., Ltd.

[0050] Sunflower seed oil was purchased from Guangzhou Baiyu Biotechnology Co., Ltd.

[0051] Preparation of soothing essential oil composition:

[0052] Example 1:

[0053] A soothing essential oil composition comprising, by weight, the following ingredients:

[0054] 7 parts of Curcuma zedoaria essential oil;

[0055] Two parts of cypress essential oil;

[0056] 3 parts of pine needle plum essential oil;

[0057] 4 parts Vitex negundo essential oil;

[0058] The preparation method of the Curcuma zedoaria essential oil includes the following steps:

[0059] S1: Grind the turmeric and pass it through a 100-mesh sieve to obtain turmeric powder;

[0060] S2: Curcuma zedoaria powder was placed in a reaction vessel for supercritical CO2 extraction to obtain Curcuma zedoaria essential oil; the extraction temperature was 43℃, the extraction time was 4h, the extraction pressure was 35MPa, and the CO2 flow rate was 12L / h.

[0061] The preparation method of the pine sap essential oil includes the following steps:

[0062] S1: Wash the leaves of Pine Blossom, freeze-dry them, grind them in a grinder, and pass them through a 100-mesh sieve to obtain Pine Blossom leaf powder;

[0063] S2: Pine and red plum leaf powder was placed in a reaction vessel and extracted with supercritical CO2 to obtain pine and red plum essential oil; the extraction temperature was 33℃, the extraction time was 2h, the extraction pressure was 22MPa, and the CO2 flow rate was 11L / h.

[0064] The preparation method of the soothing essential oil includes the following steps: mixing the components in the above formula evenly to obtain a soothing essential oil composition.

[0065] Example 2:

[0066] A soothing essential oil composition comprising, by weight, the following ingredients:

[0067] 7.5 parts of Curcuma zedoaria essential oil;

[0068] 2.5 parts of cypress essential oil;

[0069] 2.5 parts of pine needle plum essential oil;

[0070] Vitex essential oil, 3.5 parts;

[0071] The preparation method of the Curcuma zedoaria essential oil includes the following steps:

[0072] S1: Grind the turmeric and pass it through a 100-mesh sieve to obtain turmeric powder;

[0073] S2: Curcuma zedoaria powder is placed in a reaction vessel for supercritical CO2 extraction to obtain Curcuma zedoaria essential oil; wherein the extraction temperature is 45℃, the extraction time is 3h, the extraction pressure is 30MPa, and the CO2 flow rate is 11L / h.

[0074] The preparation method of the pine sap essential oil includes the following steps:

[0075] S1: Wash the leaves of Pine Blossom, freeze-dry them, grind them in a grinder, and pass them through a 100-mesh sieve to obtain Pine Blossom leaf powder;

[0076] S2: Pine and red plum leaf powder is placed in a reaction vessel and extracted with supercritical CO2 to obtain pine and red plum essential oil; wherein the extraction temperature is 30℃, the extraction time is 1h, the extraction pressure is 24MPa, and the CO2 flow rate is 10L / h.

[0077] The preparation method of the soothing essential oil includes the following steps: mixing the components in the above formula evenly to obtain a soothing essential oil composition.

[0078] Example 3:

[0079] A soothing essential oil composition comprising, by weight, the following ingredients:

[0080] Curcuma zedoaria essential oil, 6 parts;

[0081] 3 parts of cypress essential oil;

[0082] 2 parts of pine needle plum essential oil;

[0083] 5 parts Vitex negundo essential oil;

[0084] The preparation method of the Curcuma zedoaria essential oil includes the following steps:

[0085] S1: Grind the turmeric and pass it through a 100-mesh sieve to obtain turmeric powder;

[0086] S2: Curcuma zedoaria powder is placed in a reaction vessel for supercritical CO2 extraction to obtain Curcuma zedoaria essential oil; wherein the extraction temperature is 40℃, the extraction time is 5h, the extraction pressure is 33MPa, and the CO2 flow rate is 13L / h.

[0087] The preparation method of the pine sap essential oil includes the following steps:

[0088] S1: Wash the leaves of Pine Blossom, freeze-dry them, grind them in a grinder, and pass them through a 100-mesh sieve to obtain Pine Blossom leaf powder;

[0089] S2: Pine and red plum leaf powder is placed in a reaction vessel and extracted with supercritical CO2 to obtain pine and red plum essential oil; wherein the extraction temperature is 35℃, the extraction time is 3h, the extraction pressure is 20MPa, and the CO2 flow rate is 12L / h.

[0090] The preparation method of the soothing essential oil includes the following steps: mixing the components in the above formula evenly to obtain a soothing essential oil composition.

[0091] Comparative Example 1:

[0092] Unlike Example 1, this example lacks cypress oil, pine pine oil, and vitex oil, and the missing mass fractions are made up with sunflower seed oil.

[0093] Comparative Example 2:

[0094] Unlike Example 1, this example lacks Curcuma zedoaria essential oil, Pineapple essential oil, and Vitex negundo essential oil, and the missing mass fractions are made up with sunflower seed oil.

[0095] Comparative Example 3:

[0096] Unlike Example 1, this example lacks Curcuma zedoaria essential oil, Cypress essential oil, and Vitex negundo essential oil, and the missing mass fractions are made up with sunflower seed oil.

[0097] Comparative Example 4:

[0098] Unlike Example 1, this example lacks Curcuma zedoaria essential oil, Cypress essential oil, and Pine Blossom essential oil, and the missing mass fractions are made up with sunflower seed oil.

[0099] Comparative Example 5:

[0100] Unlike Example 1, this example lacks turmeric essential oil, and the missing mass is made up with sunflower seed oil.

[0101] Comparative Example 6:

[0102] Unlike Example 1, this example lacks cypress essential oil, and the missing mass is made up with sunflower seed oil.

[0103] Comparative Example 7:

[0104] Unlike Example 1, this example lacks pine bud essential oil, and the missing mass is made up with sunflower seed oil.

[0105] Comparative Example 8:

[0106] Unlike Example 1, Vitex negundo essential oil was missing, and the missing mass was made up with sunflower seed oil.

[0107] Comparative Example 9:

[0108] Unlike Example 1, the preparation method of the Curcuma zedoaria essential oil includes the following steps:

[0109] Step 1: Put the turmeric powder into a distillation tank, add 20 times the weight of the turmeric powder in deionized water, seal the tank, and heat it with steam.

[0110] Step 2: When the temperature inside the distillation vessel reaches 70°C, turn on the condenser to cool it down;

[0111] Step 3: When the temperature inside the distillation tank reaches 100℃, collect the crude oil of Curcuma zedoaria;

[0112] Step 4: Add anhydrous sodium sulfate to the crude turmeric oil, dry and filter to obtain turmeric essential oil.

[0113] Comparative Example 10:

[0114] Unlike Example 1, the preparation method of the pine saffron essential oil includes the following steps:

[0115] Step 1: Put the pine needle powder into a distillation tank, add 20 times the weight of the pine needle powder in deionized water, seal the tank, and heat with steam.

[0116] Step 2: When the temperature inside the distillation vessel reaches 70°C, turn on the condenser to cool it down;

[0117] Step 3: When the temperature inside the distillation tank reaches 100℃, collect the crude oil from the pine needles;

[0118] Step 4: Add anhydrous sodium sulfate to the crude oil of pine saffron, dry and filter to obtain pine saffron essential oil.

[0119] The preparation methods for Comparative Examples 1-10 are as follows: simply mix the raw materials evenly according to their respective formula amounts.

[0120] Preparation of a skin care product with soothing effects, wherein the skin care product is specifically a skin care oil.

[0121] Preparation of soothing skincare oils:

[0122] Skin care oil 1:

[0123] Example 1: 8 wt%;

[0124] Fragrance essential oil: 0.1 wt%;

[0125] Add base oils to 100 wt%.

[0126] Skin care oil 2:

[0127] Example 1: 10 wt%;

[0128] Fragrance essential oil: 0.5 wt%;

[0129] Add base oils to 100 wt%.

[0130] Skin care oil 3:

[0131] Example 1: 5 wt%;

[0132] Fragrance essential oil: 0.3wt%;

[0133] Add base oils to 100 wt%.

[0134] Skincare oil blank:

[0135] Fragrance essential oil: 0.5 wt%;

[0136] Add base oils to 100 wt%.

[0137] The base oil mentioned in skincare oils 1-3 and the blank skincare oil is sunflower seed oil, and the fragrance essential oil is sweet orange essential oil.

[0138] Preparation of a skin product with mosquito-repellent effect, wherein the skin product is a spray.

[0139] Preparation of mosquito-repellent spray:

[0140] Spray 1:

[0141] Example 1: 30 wt%;

[0142] Add solvent to 100 wt%.

[0143] Spray 2:

[0144] Example 1: 20 wt%;

[0145] Add solvent to 100 wt%.

[0146] Spray 3:

[0147] Example 1: 25 wt%;

[0148] Add solvent to 100 wt%.

[0149] The solvent described in sprays 1-3 and the spray blank is a 30wt% aqueous ethanol solution.

[0150] I. Security Testing

[0151] Patch test

[0152] Using the 2015 "Cosmetic Safety Technical Specifications" as a reference standard, the cosmetic irritation of skin care oils 1-3 and skin care oil blank was evaluated. The test method was a skin patch test, with 30 volunteers for each sample. The volunteers were aged 20-65 years and were randomly grouped.

[0153] Test method: Place the test substance into a patch applicator at a dosage of 0.020-0.025 g. Cover the patch applicator containing the test substance onto the back or flexor side of the forearm of the subject with non-irritating adhesive tape. Gently press with the palm of your hand to ensure even adhesion to the skin surface. Leave on for 24 hours. Remove the patch applicator and observe the skin reaction 30 minutes after the pressure mark disappears. If the result is negative, observe again at 24 hours and 48 hours after the patch test.

[0154] Evaluation criteria:

[0155] Grade 0: Negative reaction;

[0156] Grade 1: Suspicious reaction, with only slight erythema;

[0157] Grade 2: Weak positive reaction, erythema, infiltration, edema, and possible papules;

[0158] Grade 3: Strong positive reaction, erythema, infiltration, edema, papules may be present, and the reaction may extend beyond the test area;

[0159] Grade 4: Extremely positive reaction, with obvious erythema, severe infiltration, edema, confluent herpes, and reaction extending beyond the test area.

[0160] Test results: All subjects had negative skin reactions.

[0161] The above test results show that the skin care oils 1-3 and the blank skin care oil provided by the present invention are gentle and non-irritating to the skin and safe to use.

[0162] Efficacy test

[0163] Experiment 1: Evaluation of Soothing Effect

[0164] Test method: Refer to "Methods for Evaluating the Efficacy of Cosmetics: Determination of Hyaluronidase Inhibitory Activity"

[0165] Specific steps:

[0166] Sample preparation

[0167] Examples 1-3 and Comparative Examples 1-10 were prepared into 8 wt% mixtures using acetate buffer.

[0168] Solvent preparation:

[0169] Hyaluronidase: 500 U / mL, solvent is acetate buffer, prepare fresh before use;

[0170] Sodium hyaluronate: 0.5 mg / mL, solvent is acetate buffer, prepare fresh before use;

[0171] Acetate buffer: Take 1155 μL of glacial acetic acid, dilute with ultrapure water to 100 mL, mix well, and take 4.8 mL of this solution as solution A. Weigh 2.72 g of sodium acetate crystals, dissolve in ultrapure water, and bring the volume to 100 mL. Mix well, and take 45.2 mL of this solution as solution B. Mix solutions A and B, and bring the volume to 100 mL with ultrapure water. Accurately measure the pH value, and adjust the pH value to 5.6 using either solution A or B.

[0172] Sodium carbonate solution: A 1.0 mol / L sodium carbonate solution in deionized water;

[0173] Acetylacetone solution: Acetylacetone is mixed with 1 mol / L sodium carbonate solution at a ratio of 1:14 (v / v), and should be prepared fresh before use;

[0174] Sodium hydroxide solution: A 0.4 mol / L sodium hydroxide solution in deionized water;

[0175] Calcium chloride solution: Weigh 0.02775g of calcium chloride, dissolve it in ultrapure water and bring the volume up to 1000mL;

[0176] Ehrlich's reagent: Dissolve and mix p-dimethylaminobenzaldehyde, concentrated hydrochloric acid, and anhydrous ethanol in a ratio of 1:18.8:18.8 (g / mL / mL) until homogeneous. Prepare fresh before use.

[0177] Following the order in Table 1, after adding samples and completing the reaction, centrifuge and transfer the supernatant. Measure the absorbance of each tube at 407 nm using a microcuvette.

[0178] The formula for calculating the inhibition rate of hyaluronidase on the sample is as follows:

[0179] Inhibition rate

[0180] Where A a The absorbance of group A; A b The absorbance of group B; A c The absorbance of group C; A d The absorbance is for group D.

[0181] The amounts of reagents added to the reaction system are shown in Table 1 below:

[0182] The experimental results are expressed as mean ± squared difference. Each sample was tested 3 times, and the results are shown in Table 2.

[0183] Table 1. Reagent additions, reaction time, and reaction conditions in the reaction system.

[0184]

[0185]

[0186] Table 2 Hyaluronidase Inhibition Rate

[0187] Group Inhibition rate / % Example 1 76.42±0.97 Example 2 74.39±0.62 Example 3 75.22±0.74 Comparative Example 1 8.24±0.92* Comparative Example 2 12.56±0.53* Comparative Example 3 9.37±0.46* Comparative Example 4 6.52±1.22* Comparative Example 5 52.73±0.93* Comparative Example 6 48.36±1.04* Comparative Example 7 50.54±0.75* Comparative Example 8 60.17±0.44* Comparative Example 9 70.51±0.47* Comparative Example 10 68.25±0.69*

[0188] Note: "*" indicates that p < 0.05 compared to Example 1.

[0189] As shown in Table 2, the essential oil composition provided by this invention has a certain inhibitory effect on hyaluronidase and a soothing effect. Comparing Example 1 with Comparative Examples 1-4 and 5-8, it can be seen that the Curcuma zedoaria essential oil, Cypress arborvitae essential oil, Pine and Red Plum essential oil, and Vitex negundo essential oil provided by this invention have a certain synergistic effect. Comparing Example 1 with Comparative Example 9, it can be seen that the Curcuma zedoaria essential oil prepared using the preparation method provided by this invention can more effectively inhibit hyaluronidase activity; comparing Example 1 with Comparative Example 10, it can be seen that the Pine and Red Plum essential oil prepared using the preparation method provided by this invention can more effectively inhibit hyaluronidase activity.

[0190] Experiment 2: Mosquito Repellent Experiment

[0191] Test method: Refer to GB / T13917.9-2009 "Pesticide Registration - Indoor Efficacy Testing and Evaluation of Sanitary Insecticides - Part 9: Repellents"

[0192] Specific steps:

[0193] Sample preparation: Examples 1-3 were prepared into a 10wt% mixture using a 30wt% aqueous ethanol solution;

[0194] 10wt% Curcuma zedoaria essential oil: The Curcuma zedoaria essential oil prepared in Example 1 was prepared into a 10wt% mixture using a 30wt% aqueous ethanol solution.

[0195] 10wt% Cypress oil: Cypress oil was prepared into a 10wt% mixture using a 30wt% aqueous ethanol solution.

[0196] 10wt% Pine and Red Plum Essential Oil: The pine and red plum essential oil prepared in Example 1 was prepared into a 10wt% mixture using a 30wt% aqueous ethanol solution.

[0197] 10wt% Vitex essential oil: Vitex essential oil was prepared into a 10wt% mixture using a 30wt% aqueous ethanol solution.

[0198] 10wt% DEET: Prepare a 20wt% mixture of DEET using a 30wt% aqueous ethanol solution.

[0199] Sample application: Apply the sample evenly to the test area of ​​one hand at a dosage of 1.5 μL / cm². 2 Apply an equal amount of 30wt% ethanol aqueous solution to the other hand as a control hand.

[0200] Mosquito preparation: Female Aedes albopictus mosquitoes that have not fed on blood 3-5 days after emergence.

[0201] Test conditions: Temperature 26±1℃, relative humidity 62±1%;

[0202] Attack Power Test: 300 mosquitoes are placed in a mosquito cage. The tester exposes 40×40mm of skin on the back of their hand, while the rest of their hand is completely covered. The hand is placed inside the cage for 2 minutes, and the tester closely observes. When a mosquito lands, the tester shakes their arm just before the mosquito's mouthparts pierce the skin, thus driving it away; this is recorded as one mosquito landing. Testers and mosquitoes with more than 30 mosquitoes landing are considered to have passed the attack power test, and this person and this cage of mosquitoes can then be used for a repellency test.

[0203] Repellency Test: Thirty-six test subjects with adequate aggression were selected (half male and half female, and they should not consume alcohol, tea, or coffee, or use products containing fragrances before or during the test). Four test subjects were assigned to each sample. A 50mm × 50mm skin area was drawn on the back of each of their hands, and 1.5 μL / cm² of the skin was applied to one hand. 2 The appropriate dosage was evenly applied to the sample to be tested, exposing a 40mm × 40mm portion while completely covering the rest. The other hand served as a blank control. Two hours after applying the sample, both hands were immersed in mosquito cages with acceptable attack power for 2 minutes, observing whether any mosquitoes came to land and feed. This was repeated every hour thereafter. If even one mosquito came to feed, the repellency was considered a failure. The effective protection time (in hours) of the sample was recorded. Each time, the control hand was tested first. Mosquito cages with acceptable attack power could continue the test; those with unacceptable attack power needed to be replaced with cages with acceptable attack power.

[0204] Data processing: The effective protection time of the sample to 4 testers was added together, and the average (rounded to one decimal place) was taken as the effective protection time of the sample. An effective protection time ≥6h was classified as Grade A efficacy, <6h but ≥4h as Grade B efficacy, and <4h as no efficacy.

[0205] The specific results are shown in Table 3.

[0206] Table 3 Results of mosquito repellent efficacy

[0207] Group Time / h Rating Example 1 8.4 A Example 2 8.2 A Example 3 8.1 A 10wt% Curcuma zedoaria essential oil 3.2 none 10wt% Chinese cypress essential oil 4.1 B 10wt% Pine Blossom Essential Oil 4.3 B 10wt% Vitex essential oil 4.1 B 30wt% ethanol 0.6 none 10wt% DEET 4.6 B

[0208] According to the data in Table 3, the mosquito-repelling effects of Examples 1-3 used in this invention are significant, and at the same dosage, they are significantly better than DEET under the same concentration conditions. Comparing Example 1 with 10wt% of Curcuma zedoaria essential oil, Cypress cypress essential oil, Pine rosa essential oil, and Vitex negundo essential oil, it can be seen that in terms of mosquito-repelling efficacy, Curcuma zedoaria essential oil, Cypress cypress essential oil, Pine rosa essential oil, and Vitex negundo essential oil have a synergistic effect, and their combined use can significantly enhance the mosquito-repelling efficacy.

[0209] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A soothing essential oil composition, characterized in that, By weight, the ingredients include: 6-8 parts of Curcuma zedoaria essential oil, 1-3 parts of Cypress cypress essential oil, 2-4 parts of Pine and Red Plum essential oil, and 3-5 parts of Vitex negundo essential oil; The preparation method of the Curcuma zedoaria essential oil includes the following steps: S1: Grind the turmeric and sieve it to obtain turmeric powder; S2: Place the Curcuma zedoaria powder in a reaction vessel for supercritical CO2 extraction to obtain Curcuma zedoaria essential oil; wherein the extraction temperature is 40-45℃, the extraction time is 3-5h, the extraction pressure is 30-35MPa, and the CO2 flow rate is 11-13L / h. The preparation method of the pine sap essential oil includes the following steps: S1: Wash the leaves of Pineapple, freeze-dry them, grind them in a grinder, and sieve them to obtain Pineapple leaf powder; S2: Place the powdered leaves of *Pinus sylvestris* in a reaction vessel and extract them using supercritical CO2 to obtain *Pinus sylvestris* essential oil; The extraction temperature is 30-35℃, the extraction time is 1-3h, the extraction pressure is 20-24MPa, and the CO2 flow rate is 10-12L / h.

2. The composition according to claim 1, characterized in that, By weight, the ingredients include: 6.5-7.5 parts of Curcuma zedoaria essential oil, 1.5-2.5 parts of Cypress cypress essential oil, 2.5-3.5 parts of Pine and Red Plum essential oil, and 3.5-4.5 parts of Vitex negundo essential oil.

3. The composition according to claim 2, characterized in that, By weight, the ingredients include: 7 parts Curcuma zedoaria essential oil, 2 parts Cypress cypress essential oil, 3 parts Pine and Red Plum essential oil, and 4 parts Vitex negundo essential oil.

4. The use of the composition according to any one of claims 1-3 in the preparation of topical skin products having a soothing effect.

5. A topical skin product with soothing effects, characterized in that, The topical skin product contains the following components by weight percentage: 5-10% of the composition according to any one of claims 1-3; Perfume essential oil 0.1-0.5%; Replenish the base oils to 100%.

6. The topical skin care product according to claim 5, characterized in that, The base oil is at least one of rapeseed oil, peanut oil, flaxseed oil, sunflower seed oil, jojoba oil, coconut oil, sweet almond oil, and palm oil.

7. The topical skin care product according to claim 5, characterized in that, The flavoring essential oil is at least one of lemon essential oil and sweet orange essential oil.

8. The use of the composition according to any one of claims 1-3 in the preparation of topical skin products with mosquito-repellent properties.

9. A topical skin product with mosquito-repellent properties, characterized in that, The topical skin product contains the following components by weight percentage: 20-30% of the composition according to any one of claims 1-3; The ethanol solution was replenished to 100%. The ethanol solution is an aqueous solution of ethanol with a concentration of 10-30 wt%.

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