Solid mask composition containing white birch juice extract and preparation method thereof

Abstract

The invention belongs to the field of skin care cosmetics. In particular to a solid mask composition containing silver birch juice extract and a preparation method thereof. The solid mask composition comprises the following components in percentage by weight: 4.5-7.5% of sodium stearate; 20%-25% of kaolin; 10%-25% of a humectant; 0.1%-5% of a silver birch juice extract; 1%-2.5% of a film forming agent; 5%-10% of a filling agent; 0.5%-2% of a preservative; 0-1% of a coloring agent; 0.03%-0.08% of a chelating agent; and the balance of water; the humectant comprises micromolecular polyol, a water-soluble polymer and a sealing agent. The composition has excellent effects of cleaning, controlling oil and minimizing pores, and the white birch juice extract can be matched with the humectant to jointly improve the stability of the composition, so that the effective components are more uniform and stable in the composition, and the effectiveness of the composition is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of skin care cosmetics, and particularly relates to a solid mask composition containing birch sap extract and a preparation method thereof. BACKGROUND

[0002] With the acceleration of the pace of contemporary life, the increase of life pressure and mental stress may cause sebum secretion disorder. In addition, external stimuli such as pollutant particles in the air are easy to adhere to the skin surface, block pores and hinder the normal discharge of sebum, resulting in oil accumulation. At the same time, long-term irradiation of ultraviolet rays can stimulate the proliferation and differentiation of sebaceous gland cells, accelerate the synthesis of oil and secrete excessive oil. Excessive oil can cause the skin surface to be oily, making the skin more prone to contamination with bacteria and pollutants in the environment. Excessive accumulation of bacteria and pollutants can easily lead to problems such as increased acne, blocked and enlarged pores, rough skin, oily skin and seborrheic dermatitis.

[0003] Mud mask, as a cleaning and oil control product, is favored by consumers. Mud mask generally selects kaolin, bentonite, hectorite, glacial mud, etc. as mud matrix. Due to the interlayer structure of these muds, they have good adsorption properties and can adsorb oil and other skin garbage during use, thus having oil control ability and cleaning effect.

[0004] However, the existing mud mask still has deficiencies in the pore shrinking effect after cleaning. Pore enlargement is easy to adsorb pollutants in the environment again, causing the skin to be oily again, resulting in poor skin appearance. At the same time, the mud mask product is mostly in the form of mud paste mask, and the texture is relatively thick. It may not be easy to push open uniformly during application, affecting the use experience. At the same time, it is also more troublesome to clean, and it takes more time and effort to completely wash off. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a solid mask composition containing birch sap extract and a preparation method thereof. Through the synergistic effect of birch sap extract and humectant, the cleaning and oil control, pore shrinking and moisturizing effects of the composition of the present application can be improved.

[0006] The technical solution adopted by the present application to solve the above problems is as follows:

[0007] A solid mask composition containing birch sap extract, comprising the following components calculated by weight percentage: sodium stearate 4.5% to 7.5%; kaolin 20% to 25%; humectant 10% to 25%; birch sap extract 0.1% to 5%; film forming agent 1% to 2.5%; filler 5% to 10%; preservative 0.5% to 2%; colorant 0% to 1%; chelating agent 0.03% to 0.08%; and the balance of water; the humectant includes small molecule polyol, water-soluble polymer and occlusive agent.

[0008] By the technical scheme, the birch sap contains specific active components such as betulin and betulinic acid, and is rich in various effective components such as amino acids, trace elements, polyphenols, flavonoids, birch bud acid and soluble proteins, can promote the content of natural moisturizing factors in the stratum corneum, promote the transportation of water and glycerol from the dermis to the epidermis, enhance the hydration capacity of the skin, and the birch sap can also enhance the barrier function of the skin by promoting protein expression. By matching the birch sap extract with the components of the present application, the cleaning and oil control ability of the composition of the present application can be improved, the skin pores can be contracted after cleaning the skin, and the cleaning degree and appearance of the skin can be further improved, and the possibility of oily skin caused by re-adsorption of pollutants can be reduced.

[0009] The preparation method of the birch sap extract comprises the following steps:

[0010] S1. Collecting birch sap, extracting and filtering the obtained birch sap by using a microporous filter membrane with a pore size of 0.22 μm, the vacuum degree of the extraction and filtration is 0.1-0.6 MPa, the temperature of the extraction and filtration is 45-55℃, and the filtrate is obtained after standing for 1-3 h after the extraction and filtration;

[0011] S2. Centrifuging the filtrate by using a centrifuge, the speed of the centrifuge is 2500-3500 r / min, the centrifugation time is 20-30 min, and the organic phase is separated after centrifugation;

[0012] S3. Concentrating the organic phase to 10%-15% of the original volume, and the concentration temperature is 45-50℃;

[0013] S4. Taking the concentrated organic phase and adding it into a reaction kettle, then adding lecithin, the mass ratio of the organic phase to lecithin is 20:1, adjusting the pressure of the reaction kettle to 0.18 MPa, homogenizing for 15-20 min, and adding a buffer solution to adjust the pH to 4-6 during the homogenization process to obtain liposomes;

[0014] S5. Adding maltodextrin to the liposomes of the birch sap, and using a low-temperature vacuum spray dryer to dry the liposomes at low temperature and vacuum, the vacuum degree of the low-temperature vacuum spray dryer is controlled to be-0.06 to-0.08 MPa, the air inlet temperature is 85-90℃, and the feeding speed is 5.8-6 L / min, to obtain a birch sap extract powder, and the birch sap extract powder is dissolved with deionized water, the mass ratio of the birch sap extract powder to deionized water is 1:5, to obtain a birch sap extract.

[0015] By the above technical scheme, the effective components in the white birch juice can be effectively extracted, and the water-soluble white birch juice organic phase is wrapped by the oil-soluble lecithin to form micro-liposomes, so that the effective components in the white birch juice are not easy to separate in the composition of the present application, and the effectiveness of the white birch juice extract is improved. The low-temperature vacuum spray dryer can press the white birch juice liposomes added with malt dextrin out of the nozzle, so that the temperature of the material body is rapidly reduced, the material body is quickly atomized, and fine white birch juice extract powder is prepared, and the active components of the material are preserved. At the same time, the white birch juice extract powder is convenient to store and transport, and when used, 50-60 DEG C deionized water is added to the white birch juice extract powder, so that the white birch juice extract powder is dissolved to obtain the white birch juice extract, which is convenient to use.

[0016] Further, in step S3, the concentration is performed by using a rotary evaporator, the rotating speed of the rotary evaporator is 50-100 rpm, and the vacuum degree is ≤15 mbar.

[0017] Further, in step S4, the reaction kettle is a reaction kettle with a homogenizing motor, and the power of the homogenizing motor is 1.5 KW.

[0018] Further, in step S4, the buffer solution is a citric acid-sodium citrate solution.

[0019] Further, in step S5, the temperature of the deionized water is 50-60 DEG C.

[0020] Further, the small-molecule polyol includes one or more of dihydric alcohol and trihydric alcohol; the water-soluble polymer is hyaluronic acid; and the occlusive agent includes one or more of petrolatum, lanolin, and bis-diglyceryl polyacyladipate-2.

[0021] Preferably, the small-molecule polyol is glycerol, the water-soluble polymer is hyaluronic acid with a molecular weight of 10 5 ~10 7 Da, and the occlusive agent is petrolatum.

[0022] By the above technical scheme, bis-diglyceryl polyacyladipate-2 has high water absorption capacity and excellent adhesion to the skin, and the color and odor of bis-diglyceryl polyacyladipate-2 are low, which can be better applied in the composition. Moreover, by compounding glycerol, hyaluronic acid and bis-diglyceryl polyacyladipate-2, the moisturizing capacity of the composition of the present application can be significantly improved, the skin can be softened, the water retention and shaping capacity of the solid mask composition of the present application in high and low temperature tests can be improved, and the stability of the solid mask composition of the present application is enhanced, and the solid mask composition is not easy to crack.

[0023] Further, the film-forming agent includes one or more of polyvinylpyrrolidone (PVP) and N-vinylpyrrolidone / vinyl acetate (VP / VA) copolymer.

[0024] Preferably, the PVP has a molecular weight of 40,000-150,000 Da, and the VP / VA copolymer has a molecular weight of 30,000-500,000 Da.

[0025] Preferably, the film-forming agent is a VP / VA copolymer.

[0026] By the above technical solution, the VP / VA copolymer has more excellent hydrophobicity and is also softer, not easy to absorb moisture in the air, and can improve the stability of the state of the composition of the present application.

[0027] Further, the filler includes one or more of bamboo charcoal powder and diatomite.

[0028] Further, the colorant includes one or more of carbon black, titanium dioxide, and natural pigment.

[0029] Further, the kaolin is 3,000-7,000 mesh high whiteness calcined kaolin.

[0030] Preferably, the kaolin is 5,000 mesh high whiteness calcined kaolin.

[0031] By the above technical solution, the 5,000 mesh high whiteness calcined kaolin can provide a soft touch and better adsorption capacity, can remove dirt on the surface of the skin, absorb oil in the deep pores, and finely exfoliate, thereby improving the cleaning and oil control capacity of the composition of the present application. In addition, the maximum whiteness of the 5,000 mesh high whiteness calcined kaolin can reach more than 95%, providing more freedom for product coloring.

[0032] Further, the preservative includes one or more of p-hydroxyacetophenone, phenoxyethanol, octisalate, 1,2-hexanediol, and 1,2-pentanediol.

[0033] Further, the chelating agent includes one or more of disodium EDTA, tetrasodium EDTA, and sodium phytate.

[0034] A method for preparing a solid mask composition containing white birch juice extract, comprising the following steps:

[0035] A1. Sodium stearate is added to deionized water, heated to 75-90°C and completely dissolved;

[0036] A2. Disperse the film-forming agent, kaolin, and filler with glycerol, after dispersion, add the solution obtained in step A1, stir and keep at 75-90°C for 0.5-1 h;

[0037] A3. After the material obtained in step A2 is cooled to 58-65°C, add the preservative, colorant, chelating agent, and white birch juice extract, and stir uniformly;

[0038] A4. Hot fill the material obtained in step A3 into a packaging material and cool to form.

[0039] Further, the temperature of the hot filling is 53-58℃.

[0040] The present application has the following advantages:

[0041] 1. The white birch juice extract liposome prepared by the present application enhances the stability and efficacy of the active ingredients of the white birch juice extract through the solubilizing property of the microemulsion, and the lipid bilayer structure of the liposome rearranges the stratified cell structure of the stratum corneum, thereby increasing the transdermal rate of the active ingredients of the white birch juice extract. The moisturizing agent swells the keratinocytes through hydration, and the bis-diglyceryl polyacyladipate-2 forms a hydrophobic film on the surface of the skin, thereby forming a covering effect. The covering effect increases the endogenous hydration of the stratum corneum and physically blocks the loss of water through the epidermis (TEWL), thereby prolonging the residence time of water and active ingredients. Through the rational construction of the composition system architecture and the limitation of the key parameters of the components, the composition of the present application has good cleansing, oil control, and pore tightening ability. The moisturizing agent combination can improve the water retention and moisturizing ability of the composition of the present application, improve the stability of the composition of the present application, and provide better use experience for the user. The white birch juice extract can synergize with the moisturizing agent to further improve the cleansing, oil control, and pore tightening ability of the composition of the present application, and the white birch juice extract can also be combined with the moisturizing agent to jointly improve the stability of the composition of the present application, so that the active ingredients are more uniform and stable in the composition of the present application, thereby improving the effectiveness of the composition of the present application.

[0042] 2. Through the extraction process of the white birch juice extract of the present application, the betulin, betulinic acid, various amino acids, trace elements, polyphenols, flavonoids, birch bud acid, and soluble proteins, and other active ingredients in the white birch juice can be extracted and protected, thereby improving the actual efficacy of the white birch juice extract. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions, and technical advantages of the present application clearer, specific examples will be described in detail below, but the protection scope of the present application is not limited to the following specific examples. The described examples are only a part of the examples of the present application, but not all the examples, and are not a limitation of the present application. Based on the examples in the present application, all other examples obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0044] Unless otherwise defined, all terms used in the description employed herein have the same meaning as commonly understood by one of ordinary skill in the art. As used herein, the following professional terms are intended to have the following meanings.

[0045] Unless otherwise specified, various materials, reagents, instruments and equipment and the like used in the present application can be purchased on the market or can be prepared by existing methods.

[0046] In the quantitative test in the following examples, three repeated experiments were set, and the data were the average value or average value ± standard deviation of the three repeated experiments.

[0047] Examples 1-3 and Comparative Examples 1-8 each provide a solid mask composition, and the specific components and contents are shown in Table 1 below, with the unit being weight percentage.

[0048] Table 1

[0049]

[0050]

[0051] Specifically, the preparation method of the birch sap extract in the above examples and comparative examples includes the following steps:

[0052] S1. Select spring time, randomly select 12 sample trees with a diameter at breast height of more than 22 cm and good growth state in a birch natural experimental forest, drill a 3 cm deep liquid collection hole at a distance of 1 m from the ground on the sunny side of the sample tree, collect the sap of the birch tree until no sap flows out, obtain the birch sap, and extract and filter the birch sap with a micropore filter membrane with a pore size of 0.22 μm, the vacuum degree of the extraction and filtration is 0.4 MPa, the temperature of the extraction and filtration is 45-55℃, and after standing for 2 h, the filtrate is obtained;

[0053] S2. Centrifuge the filtrate using a centrifuge, the speed of the centrifuge is 3000 r / min, the centrifugation time is 20-30 min, and after centrifugation, the organic phase is separated;

[0054] S3. Concentrate the organic phase using a rotary evaporator, the speed of the rotary evaporator is 75 rpm, the vacuum degree is ≤15 mbar, and the temperature is 45-50℃, and the organic phase is concentrated to 10%-15% of the original volume;

[0055] S4. Take the concentrated organic phase into the reaction kettle with homogenizing motor, then add lecithin, the mass ratio of organic phase to lecithin is 20:1, adjust the pressure of the reaction kettle to 0.18 MPa, the power of the homogenizing motor is 1.5 KW, the homogenizing time is 15-20 min, add buffer solution in the homogenizing process, the buffer solution is citric acid-sodium citrate solution, adjust the pH to 4-6, to obtain the liposome;

[0056] S5. Take the liposome and maltodextrin to mix, the mass fraction of liposome in the total mass of liposome and maltodextrin is 94.8%, the mass fraction of maltodextrin in the total mass of liposome and maltodextrin is 5.2%, use low-temperature vacuum spray dryer to dry, control the vacuum degree of low-temperature vacuum spray dryer to be -0.06 MPa, the air inlet temperature is 85℃, the feeding speed is 6 L / min, to obtain birch juice extract powder, dissolve the birch juice extract powder with 50-60℃ deionized water, the mass ratio of birch juice extract powder to deionized water is 1:5, to obtain birch juice extract.

[0057] The preparation method of the solid mask composition of the above embodiment comprises the following steps:

[0058] A1. Add sodium stearate into deionized water, the weight ratio of sodium stearate to deionized water is 1:5, heat to 75-90℃ and completely dissolve;

[0059] A2. Disperse VP / VA copolymer, 5000 mesh high whiteness calcined kaolin and diatomite with glycerol, after dispersion, add the solution obtained in step A1, stir and keep warm for 0.5 h;

[0060] A3. When the material obtained in step A2 is cooled to 58-65℃, add preservative, colorant, chelating agent and birch juice extract, stir uniformly;

[0061] A4. Hot fill the material obtained in step A3 into the package material at a temperature of 53-58℃, and cool to shape.

[0062] The preparation method of the solid mask composition of the comparative example can be obtained in the same way.

[0063] The above examples and comparative examples are subjected to stability test, instrument efficacy evaluation and human sensory evaluation.

[0064] Stability test

[0065] Stability test: imitate the normal environment of the product (room temperature, sunlight irradiation) and different seasonal conditions (high temperature, low temperature, sunlight irradiation), and appropriately strengthen the experimental conditions, so that the physical or chemical changes of the cosmetic and the packaging material in the long-term storage or use process can be reflected in a short time.

[0066] Test plan: The solid mask composition filled in the columnar packaging material was stored at -15℃, 5℃, 25℃, 40℃, 48℃ and light TL84 condition for 4 weeks, and the appearance of the sample was recorded at 25℃ as a control sample.

[0067] The stability test results are shown in Tables 2-1 and 2-2.

[0068] Table 2-1

[0069]

[0070]

[0071] Table 2-2

[0072]

[0073]

[0074] By comparing the test results of Example 1 and Comparative Examples 1-8, it can be seen that the solid mask composition is prone to sweating under low temperature conditions, which causes the active ingredients in the solid mask composition to be inactivated; under high temperature and light conditions, the solid mask composition is prone to shrinkage and cracking, which causes the active ingredients in the solid mask composition to migrate to the surface and be lost, reducing the oil control and moisturizing effects of the solid mask composition, and the solid mask composition is difficult to form a continuous film layer on the skin after shrinkage, affecting the film forming property.

[0075] By comparing the test results of Examples 1-3 and Comparative Examples 1-2, it can be seen that the addition of birch juice extract helps to improve the column stability of the composition of the present application, and has good performance under low temperature, high temperature and light conditions.

[0076] By comparing the test results of Example 2 and Comparative Examples 3-4, it can be seen that too high or too low addition of kaolin has adverse effects on the column stability of the composition of the present application, the surface is rough at low temperature, and the column is prone to dry cracking at high temperature. After repeated experimental tests, it is determined that the preferred addition amount of kaolin is in the range of 20% to 25%.

[0077] By comparing the test results of Example 2 and Comparative Examples 5-8, it can be seen that when the humectant is compounded with small molecule polyol, water-soluble polymer and occlusive agent, especially when glycerol, hyaluronic acid and bis-diglyceryl polyacyladipate-2 are used, the composition of the present application can maintain column stability under high and low temperature tests, enhance column stability, and make the solid mask less prone to cracking, thereby enhancing the cleaning, oil control and moisturizing properties of the composition of the present application.

[0078] By comparing the test results of Examples 1-3 and Comparative Examples, it can be seen that the addition of birch juice extract can synergize with the moisturizer to further enhance the column stability of the composition of the present application.

[0079] Instrument efficacy evaluation

[0080] Any 20 volunteers were selected to use the compositions of the present application of Examples and Comparative Examples together. First, the composition of Example 1 was used together, and then the composition of Example 2 was used together, and so on. Since Comparative Example 4, Comparative Examples 6-8 were not qualified for stability, they were not included in the experimental objects for efficacy evaluation.

[0081] Oil content test

[0082] 1. Test instrument and principle: skin surface sebum tester (Courage + Khazaka Sebumeter SM815): the test is based on the principle of sebum test photometer. The light transmittance distribution curve on the adhesive tape can be tested by the photoelectric device in the instrument, and the peak value of the light transmittance curve distribution represents the content of the lipid compounds, i.e. oil, in the scalp. The lower the value, the less the skin sebum secretion.

[0083] 2. Test environment requirements: temperature: 21.0±1.0℃; humidity: 50%±10%RH.

[0084] 3. Before using the product

[0085] 3.1 The test site cannot use any product (cosmetic or external medicine) for 3 days before the test. Before the test, the subjects need to clean their faces uniformly, and the cleaning method is to clean the forehead with a soap-based facial cleanser (pH range 9-11), then wash it clean with clean water, and dry it with a dry lint-free washcloth;

[0086] 3.2 The sebum content of the sample area is determined within three minutes, and the initial value at 0 hour is recorded.

[0087] 4. Application (application site, application amount, application method)

[0088] An appropriate amount of test sample is used on the sample area, and after waiting for 15-20 minutes, the excess material is removed and then washed clean, and dried with a dry lint-free washcloth.

[0089] 5. After using the product

[0090] After 3 hours and 6 hours, the skin sebum content of the sample area is determined, and the test values at 3 hours and 6 hours are recorded.

[0091] 6. Data statistics: process the data through data processing software.

[0092] Self before and after change rate: [(after use mean - before use mean) / before use mean] * 100%.

[0093] Stratum corneum moisture content test

[0094] 1. Test according to: QB / T 4256-2011 "Cosmetic Moisturizing Efficacy Evaluation Guide"

[0095] 2. Test instrument and principle: Skin moisture content test probe (Courage + Khazaka Corneometer CM825): used to detect the moisture content of the stratum corneum of the skin, the higher the Comeometer value, the higher the moisture content of the stratum corneum of the skin.

[0096] 3. Test environment requirements: Temperature: 21.0 ± 1.0℃; Humidity: 50% ± 10% RH.

[0097] 4. Before use: The test subject sits in the laboratory at a temperature of 21 ± 1℃ and a relative humidity of 50% ± 10% RH for at least 10 minutes before testing, does not drink water or beverages, exposes the face, and remains relaxed; the initial value of the stratum corneum moisture content of the sample area is determined, and the data is recorded as 0h.

[0098] 5. Use sample: Use an appropriate amount of test sample on the sample area, wait for 15-20 minutes, then clean up the excess material and wash it clean with a dry, non-shedding washcloth, and use the sample 3 times (D1, D3, D7) in 7 days.

[0099] 6. After using the product: The determination time of the initial value is consistent (9:00-11:00), and the stratum corneum moisture content of the sample area is determined immediately after use and 7 days after use.

[0100] 7. Process the data through data processing software.

[0101] Self before and after change rate: [(after use mean - before use mean) / before use mean] * 100%.

[0102] Facial pore test

[0103] 1. Test instrument and principle: Skin surface texture analyzer (Visioscan VC20 plus) takes images of the skin surface through a uniform ring-shaped ultraviolet light (UVA) illumination source and a black and white high-resolution CCD camera composed of a skin scope, the images are transmitted to the host computer for digital processing, the images are displayed in 256 black and white gray levels, and the number of pores at each time point is analyzed through skin texture images.

[0104] 2. Test environment requirements: Temperature: 21.0 ± 1.0℃; Humidity: 50% ± 10% RH.

[0105] 3. Before the test: The test subject sits in the laboratory for at least 10 minutes at a temperature of 21±1℃ and a relative humidity of 50%±10% RH, cannot drink water and beverages, the face is exposed, and remains relaxed; the initial value of the sample area is determined, and the data is recorded as 0d.

[0106] 4. After the test: The sample area is applied with an appropriate amount of the test sample, and after standing for 15-20 minutes, the excess material is removed and cleaned with a dry, non-shredded washcloth, and the sample is used 3 times (D1, D3, D7) in 7 days.

[0107] 5. After using the product: The pore count of the sample area is determined at the same time as the initial value (9:00-11:00), immediately after using the sample and 7 days later.

[0108] 6. The data is processed by data processing software.

[0109] Self-change rate: [(average value after use - average value before use) / average value before use] * 100%.

[0110] The specific evaluation results are shown in Table 3.

[0111] Table 3

[0112]

[0113]

[0114] From the test results of Examples 1-3, it can be seen that after 3h and 6h of cleaning using the composition of the present application, the composition of the present application exhibits significant control of oil and moisturizing effect, and can effectively improve the condition of facial pore enlargement after one week of use, has excellent cleaning oil control and pore shrinking ability, and can provide good user experience.

[0115] From the comparison of the test results of Examples 1-3 and Comparative Example 1, it can be seen that the birch juice extract as a skin conditioner, its addition amount is preferably 0.5%-1.5%, which can effectively improve the cleaning oil control and pore shrinking ability of the present application.

[0116] Comparative Example 2 uses the commercially available product of the skin conditioner, which is the witch hazel extract commonly used for oil control and pore shrinking. From the comparison of the test results of Example 1 and Comparative Example 2, it can be seen that compared with the addition of the witch hazel extract, the addition of the birch juice extract prepared by the present application can more highlight the effect of the birch juice extract in improving the cleaning oil control and pore shrinking ability, and can effectively improve the condition of facial oil secretion and pore enlargement after one week of use.

[0117] By comparing the test results of Example 2 and Comparative Example 3, it can be seen that increasing the content of kaolin can improve the ability of the composition of the present application to control oil secretion.

[0118] By comparing the test results of Example 2 and Comparative Example 1, it can be seen that compared with adding a humectant alone, simultaneously adding birch juice extract and a humectant can jointly improve the ability of the composition of the present application to clean and control oil and shrink pores, indicating that adding birch juice extract in the composition of the present application can have a synergistic effect with the humectant.

[0119] The above describes the preferred embodiments of the present application, but the present application is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0120] In addition, it should be noted that each specific technical feature described in the above-described specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present application will not further describe various possible combinations.

[0121] In addition, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, and it should also be considered as disclosed by the present application.

Claims

1. A solid pack composition containing white birch sap extract, characterized by, The composition includes the following components calculated by weight percentage: sodium stearate 4.5% to 7.5%; kaolin 20% to 25%; humectant 10% to 25%; birch sap extract 0.1% to 5%; film-forming agent 1% to 2.5%; filler 5% to 10%; preservative 0.5% to 2%; colorant 0% to 1%; chelating agent 0.03% to 0.08%; and the balance of water; the humectant includes one or more of a small-molecule polyol, a water-soluble polymer, and a blocking agent.

2. The solid mask composition containing birch sap extract according to claim 1, characterized by, The preparation method of the birch sap extract includes the following steps: S1. Collecting birch sap, extracting and filtering the obtained birch sap by using a microporous filter membrane with a pore size of 0.22 μm, the vacuum degree of the extraction and filtration being 0.1 to 0.6 MPa, the temperature of the extraction and filtration being 45 to 55 °C, and the filtrate being obtained after the extraction and filtration is left to stand for 1 to 3 h; S2. Centrifuging the filtrate by using a centrifuge, the rotation speed of the centrifuge being 2500 to 3500 r / min, the centrifugation time being 20 to 30 min, and the organic phase being separated after the centrifugation; S3. Concentrating the organic phase to 10% to 15% of the original volume, and the concentration temperature being 45 to 50 °C; S4. Taking the concentrated organic phase and adding it into a reaction kettle, adding lecithin, the mass ratio of the organic phase to the lecithin being 20:1, adjusting the pressure of the reaction kettle to 0.18 MPa, homogenizing for 15 to 20 min, and adding a buffer solution to adjust the pH to 4 to 6 during the homogenization to obtain liposomes; S5. Adding maltodextrin into the liposomes of the birch sap, and low-temperature vacuum drying the liposomes by using a low-temperature vacuum spray dryer, the vacuum degree of the low-temperature vacuum spray dryer being controlled to be -0.06 to -0.08 MPa, the air inlet temperature being 85 to 90 °C, and the feeding speed being 5.8 to 6 L / min to obtain birch sap extract powder, and the birch sap extract powder is dissolved by using deionized water, the mass ratio of the birch sap extract powder to the deionized water being 1:5 to obtain the birch sap extract.

3. The solid mask composition containing birch sap extract according to claim 1, characterized by, The small-molecule polyol includes one or more of a dihydric alcohol and a trihydric alcohol; the water-soluble polymer is hyaluronic acid; and the blocking agent includes one or more of vaseline, lanolin, and bis-diglyceryl polyacyladipate-2.

4. The solid mask composition containing birch sap extract according to claim 3, characterized by, The small molecule polyol is glycerol, and the water-soluble polymer is hyaluronic acid with a molecular weight of 10 5 ~ 10 7 Da.

5. The solid mask composition containing birch sap extract according to claim 4, characterized by, The glycerol accounts for 75% to 85% of the weight of the humectant; the hyaluronic acid accounts for 0.3% to 1% of the weight of the humectant; and the bis-diglyceryl polyacyladipate-2 accounts for 10% to 25% of the weight of the humectant.

6. The solid mask composition containing birch sap extract according to claim 1, characterized by, The film-forming agent includes one or more of polyvinylpyrrolidone (PVP) and N-vinylpyrrolidone / vinyl acetate (VP / VA) copolymer.

7. The solid mask composition containing birch sap extract according to claim 1, characterized by, The filler includes one or more of bamboo charcoal powder and diatomite.

8. The solid mask composition containing birch sap extract according to claim 1, characterized by, The colorant includes one or more of carbon black, titanium dioxide, and natural pigment.

9. The solid mask composition containing birch sap extract according to claim 1, characterized by, The kaolin is 3000 to 7000 mesh high-whiteness calcined kaolin.

10. A method for preparing the solid pack composition containing the extract of birch sap according to any one of claims 1 to 9, characterized by, The preparation method includes the following steps: A1. Adding sodium stearate into deionized water, heating to 75 to 90 °C, and completely dissolving; A2. Dispersing the film-forming agent, kaolin, and filler by using glycerol, and adding the obtained solution of step A1 after the dispersion, stirring, and keeping at 75 to 90 °C for 0.5 to 1 h; A3. The material obtained in step A2 is cooled to 58-65℃, preservatives, colorants, chelating agents and birch juice extract are added, and stirred until uniform; A4. The material obtained in step A3 is hot-filled into the packaging material and cooled to shape.

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