Mud film as well as preparation method and application thereof

Abstract

The invention discloses a mud mask as well as a preparation method and application thereof, and relates to the field of cosmetics. According to the present invention, the porous silica is added to the water phase component of the mud film raw material, such that the free water in the mud film formula can be converted into the bound water so as to avoid or significantly reduce the high temperature water outlet problem of the mud film, and the scheme is simple and easy to implement, does not affect the production and the effect of the mud film, and can solve the high temperature water outlet problem of the mud film at a low cost; and a way is provided for high-quality production of the mud film.

Description

Technical Field

[0001] The present invention relates to the field of cosmetics, and more particularly, to a mud mask, a preparation method thereof, and an application thereof. Background Art

[0002] As a daily skin care product, mud masks are deeply loved by consumers for their good oil absorption ability and skin cleansing ability, and have gradually become an integral part of consumers' daily care.

[0003] During the research and development of mud masks, the investigation target of high-temperature stability is required (the high-temperature stability is generally set at 45°C for 3 months). During the stability observation, most mud masks on the market will have the problem of water seepage, which seriously affects the product quality of the mud masks. This problem is a common problem of this dosage form, and there is no method that can significantly improve it. The current conventional solution is to add some raw materials to prevent the aggregation of powder raw materials to solve the water leakage of the mud mask, such as adding magnesium aluminum silicate, etc.; or increasing the consistency of the mud mask to prevent powder aggregation. However, it can only alleviate the water leakage problem of the mud mask to a certain extent. If the product itself has too many powder raw materials, this solution is very limited.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a mud mask, a preparation method thereof, and an application thereof.

[0006] The present invention is implemented as follows:

[0007] In a first aspect, an embodiment of the present invention provides a mud mask composition, which includes an oil phase component and a water phase component; the water phase component includes a first silica; the first silica includes porous silica.

[0008] In a second aspect, an embodiment of the present invention provides a preparation method of a mud mask, which includes mixing the mud mask composition described in the foregoing embodiment.

[0009] In a third aspect, an embodiment of the present invention provides a mud mask, which is obtained by the preparation method described in the foregoing embodiment.

[0010] In a fourth aspect, an embodiment of the present invention provides an application of porous silica in the preparation of a mud mask, and the porous silica is the first silica described in the foregoing embodiment.

[0011] The present invention has the following beneficial effects:

[0012] By adding porous silica to the aqueous component of the mud film raw material, the present invention can convert the free water in the mud film formula into bound water, avoid or significantly reduce the problem of water leakage from the mud film at high temperatures. Moreover, this solution is simple and easy to implement, does not affect the production and efficacy of the mud film, can solve the problem of water leakage from the mud film at high temperatures at low cost, and provides a way for the high-quality production of the mud film. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 The water leakage situation (restored to room temperature) of the mud film (Comparative Example 1) without adding porous strong adsorption material after one month of high-temperature stability test. The water separated out during high-temperature stability is within the red frame.

[0015] Figure 2 The water leakage situation (restored to room temperature) of the mud film (Example 1) with 0.3% porous silica added after one month of high-temperature stability test.

[0016] Figure 3 The picture of the water leakage of the mud film of Comparative Example 4.

[0017] Figure 4 The picture of the water leakage of the mud film of Comparative Example 5. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. For those conditions not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. For reagents or instruments whose manufacturers are not specified, they are all conventional products that can be obtained through commercial purchase.

[0019] The present invention discovers that by adding porous silica to the aqueous component of the mud film raw material, the free water in the mud film formula can be converted into bound water, and the problem of water leakage from the mud film at high temperatures can be avoided or significantly reduced. When verifying with samples, without adding porous silica, water leakage problems occur after one month of high-temperature stability test; after adding porous silica, the water leakage situation is solved after one month of high-temperature stability test, and the high-temperature stability test passes after three months.

[0020] The solution provided by the embodiments of the present invention is simple and easy to implement, with remarkable effects. There is almost no free water precipitation after high temperature, and the whole paste is delicate and uniform; it does not affect the production process and efficacy of the mud mask, can solve the problem of water production at high temperature of the mud mask at low cost, and provides a way for the high-quality production of the mud mask.

[0021] Specific technical solution

[0022] On the one hand, the embodiments of the present invention provide a mud mask composition, which includes an oil phase component and a water phase component; the water phase component includes a first silica, and the first silica includes porous silica.

[0023] In some embodiments, the first silica includes: silica obtained by a gas-phase process.

[0024] In some embodiments, the first silica includes: 200.

[0025] In some embodiments, the water phase component includes: water, polyol, illite hydromica, potassium sodium aluminosilicate, second silica, anionic emulsifier, EDTA-2Na, and the first silica.

[0026] In some embodiments, the polyol includes any one or more of 1,3-propanediol, glycerol, propylene glycol, butylene glycol, dipropylene glycol, and methyl propylene glycol.

[0027] In some embodiments, the anionic emulsifier includes any one or more of sodium stearoyl glutamate, potassium cetyl phosphate, and potassium lauryl phosphate.

[0028] In some embodiments, by weight, the water phase component includes: 20-50 parts of water, 5-10 parts of polyol, 15-20 parts of illite hydromica, 7-10 parts of potassium sodium aluminosilicate, 7-10 parts of second silica, 0.1-1 part of anionic emulsifier, 0.01-1 part of EDTA-2Na, and 0.1-1 part of the first silica.

[0029] Specifically, the weight parts of water can be any one of 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50 parts or the range between any two of them. The weight parts of polyol can be any one of 5, 6, 8, 10 parts or the range between any two of them. The weight parts of illite hydromica can be any one of 15, 16, 18, 20 parts or the range between any two of them. The weight parts of potassium sodium aluminosilicate can be any one of 7, 8, 9, 10 parts or the range between any two of them. The weight parts of the second silica can be any one of 7, 8, 9, 10 parts or the range between any two of them. The weight parts of the anionic emulsifier can be any one of 0.1, 0.2, 0.4, 0.6, 0.8, 1 part or the range between any two of them. The weight parts of EDTA-2Na can be any one of 0.01, 0.05, 0.1, 0.2, 0.4, 0.6, 0.8, 1 part or the range between any two of them. The weight parts of the first silica can be any one of 0.1, 0.2, 0.4, 0.6, 0.8, 1 part or the range between any two of them.

[0030] In some embodiments, the second silica includes: silica prepared by a precipitation process.

[0031] In some embodiments, the oil phase component includes: an emulsifier, a co-emulsifier, an oil and titanium dioxide.

[0032] In some embodiments, by weight parts, the oil phase component includes: 2 - 8 parts of an emulsifier, 1 - 5 parts of a co-emulsifier, 5 - 15 parts of an oil and 1 - 5 parts of titanium dioxide.

[0033] Specifically, the weight parts of the emulsifier can be any one of 2, 4, 6, 8 parts or the range between any two of them. The weight parts of the co-emulsifier can be any one of 1, 2, 3, 4, 5 parts or the range between any two of them. The weight parts of the oil can be any one of 5, 6, 8, 10, 12, 14, 15 parts or the range between any two of them. The weight parts of titanium dioxide can be any one of 1, 2, 3, 4, 5 parts or the range between any two of them.

[0034] In some embodiments, the emulsifier includes: any one or more of glyceryl stearate, PEG-100 stearate, sorbitan stearate, cetearyl olivate, sorbitan olivate, sorbitan sesquioleate, sorbitan caprylate, PEG-40 stearate, cetearyl glucoside, C12-20 acid PEG-8 ester.

[0035] In some embodiments, the co-emulsifier includes any one or more of cetearyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol.

[0036] In some embodiments, the oil includes any one or more of C9-12 alkanes, coco-caprylate / caprate, caprylic / capric triglyceride, ethylhexyl palmitate, hydrogenated polyisobutene, squalane, dicaprylyl carbonate, neopentyl glycol diheptanoate, isododecane, triglyceride (ethylhexanoic acid), polydimethylsiloxane, phenyl trimethicone, trimethylsiloxysilicate, and diphenyl dimethicone.

[0037] In some embodiments, the titanium dioxide includes CI 77891.

[0038] In some embodiments, the mud mask composition further includes excipients.

[0039] In some embodiments, the excipients include any one or more of preservatives and other active ingredients; the other active ingredients include any one or more of purslane extract, dipotassium glycyrrhizinate, and sophora flavescens root extract.

[0040] In some embodiments, the preservatives include any one or more of phenoxyethanol, methylparaben, methylisothiazolinone, p-hydroxyacetophenone, and 1,2-hexanediol.

[0041] In some embodiments, in the mud mask composition, the weight percentage of the other active ingredients is 1% to 5%, and the weight percentage of the preservatives is 0.1% to 5%.

[0042] On the other hand, an embodiment of the present invention also provides a method for preparing a mud mask, which includes mixing the mud mask composition described in any of the foregoing embodiments.

[0043] In some embodiments, the step of mixing the mud mask composition includes: first mixing the aqueous phase components in the mud mask composition to obtain an aqueous phase, and mixing the oil phase components to obtain an oil phase; mixing the oil phase and the aqueous phase for emulsification.

[0044] In some embodiments, the step of mixing the aqueous phase components includes: heating to 80-90°C after mixing to obtain the aqueous phase. The temperature can specifically be any one of 80, 82, 84, 86, 88, 90°C or the range between any two of them.

[0045] In some embodiments, first mix the first silica in the aqueous phase with water, then add other aqueous phase components, and after mixing, heat up to 80-90 °C to obtain the aqueous phase. The mixing time of the first silica and water can be 1-30 min, specifically any one of 1, 5, 10, 15, 20, 25, 30 min or the range between any two of them.

[0046] In some embodiments, the step of mixing the oil phase components includes: after mixing, heat up to 80-90 °C to obtain the oil phase. The temperature can specifically be any one of 80, 82, 84, 86, 88, 90 °C or the range between any two of them.

[0047] In some embodiments, before performing the mixing and emulsification, the preparation method further includes keeping the aqueous phase at 80-90 °C for 10-20 min. The holding time can be any one of 10, 12, 14, 16, 18, 20 min or the range between any two of them. The holding temperature can be any one of 80, 82, 84, 86, 88, 90 °C or the range between any two of them.

[0048] In some embodiments, when the mud film composition further includes the adjuvants described in any of the foregoing embodiments, the preparation method further includes: after performing the mixing and emulsification, cooling the emulsified product to 40-60 °C and adding the adjuvants.

[0049] In some embodiments, the step of adding the adjuvants includes:

[0050] First, cool the emulsified product to 50-60 °C, add a preservative, and stir evenly to obtain a first product; the temperature can specifically be any one of 50, 52, 54, 56, 58, 60 °C or the range between any two of them;

[0051] Lower the temperature of the first product to 40-50 °C, add other active ingredients, and stir evenly to obtain a second product; the temperature can be any one of 40, 42, 44, 46, 48, 50 °C or the range between any two of them;

[0052] Cool the second product to 35-45 °C and stop stirring to obtain the final product. The temperature can be any one of 35, 36, 38, 40, 42, 44, 45 °C or the range between any two of them.

[0053] On the other hand, the embodiments of the present invention also provide a mud film prepared by the preparation method described in any of the foregoing embodiments.

[0054] In addition, the embodiments of the present invention also provide the application of porous silica in the preparation of a mud film, and the porous silica is the first silica described in any of the foregoing embodiments.

[0055] The features and properties of the present invention will be further described in detail below in conjunction with embodiments.

[0056] The first silica used in the embodiment: Trade name: 200; Standard Chinese name: Silica. Manufacturer: Evonik Specialty Chemicals (Shanghai) Co., Ltd. The production process of this raw material is briefly described as: silicon tetrachloride burns with hydrogen and air at high temperature to produce colloidal silica and hydrogen chloride gas, and the product is obtained by separation.

[0057] The mixed raw materials used in the embodiment (illite hydromica, potassium sodium aluminosilicate, second silica). Trade name: GM-800; Standard Chinese name: Illite hydromica, potassium sodium aluminosilicate, silica. Manufacturer: Anhui Gerui New Material Technology Co., Ltd. The production process of this raw material is briefly described as: raw ore - wet grinding - classification and purification - heavy metal removal - pressure filtration and dehydration - drying and packaging - finished product.

[0058] The mixed raw materials used in the embodiment (glyceryl stearate, PEG-100 stearate). Trade name: SP ARLACEL170MBAL-PA-(SG); Standard Chinese name: Glyceryl stearate, PEG-100 stearate. Manufacturer: Croda Chemicals (Shanghai) Co., Ltd. The production process of this raw material is briefly described as: obtained by stirring and mixing glyceryl stearate and PEG-100 stearate and filtering.

[0059] The mixed raw materials used in the embodiment (C9-12 alkanes, coco alcohol-caprylate / caprate). Trade name: Vegelight1214LC; Standard Chinese name: C9-12 alkanes, coco alcohol-caprylate / caprate. Manufacturer: BIOSYNTHIS. The production process of this raw material is briefly described as: the end product is obtained by blending coco alcohol-caprylate / caprate with C9-12 alkanes.

[0060] Example 1

[0061] This embodiment provides a mud mask, and its components and preparation method are as follows.

[0062] Table 1 Formulation of the mud mask

[0063]

[0064]

[0065] Using the formulation shown in Table 1, the mud mask is prepared, and the preparation method is as follows:

[0066] (1) Prepare the aqueous phase

[0067] Add the water in Component A to a beaker, add the first silica to the water, and use a stirrer ( RW20 digital) to stir and disperse for about 20 minutes to allow the fumed silica to fully contact the water, convert a small amount of free water into bound water, then add other raw materials in the aqueous phase, and heat up to 85 °C to obtain the aqueous phase;

[0068] (2) Prepare the oil phase

[0069] Add Component B to an oil pot and stir to disperse, then heat up to 85 °C to obtain the oil phase;

[0070] (3) Emulsify

[0071] Pump the aqueous phase into an emulsification tank, keep it at 85 °C for 20 min, and start the emulsification stirring;

[0072] Pump the oil phase into an emulsification tube and start homogenizing emulsification;

[0073] (4) Add auxiliary materials

[0074] After emulsification is completed, turn on the cooling water. When the temperature drops to 55 °C, add Component C (preservative) and stir evenly;

[0075] Continue to cool down to 45 °C, add Phase D (other active ingredients) and stir evenly;

[0076] Continue to cool down to 37 °C, stop stirring, take samples for testing, and discharge after passing the test.

[0077] Example 2

[0078] This example provides a mud mask and its preparation method. The formula and preparation method of the mud mask are generally the same as those in Example 1, except that in this example, 1,3-propanediol in the No. 2 raw material in Example 1 is changed to butanediol, as shown in Table 2.

[0079] Table 2 Formula of the mud mask

[0080]

[0081] Example 3

[0082] This example provides a mud mask and its preparation method. The formula and preparation method of the mud mask are generally the same as those in Example 1, except that in this example, the octanoic acid / decanoic acid triglyceride in the No. 13 raw material is changed to ethylhexyl palmitate.

[0083] Table 3 Formula of the mud mask

[0084]

[0085]

[0086] Example 4

[0087] This example provides a mud mask and its preparation method. The formula and preparation method of the mud mask are generally the same as those in Example 1, except that in this example, the 12th raw material, polydimethylsiloxane, is changed to phenyltrimethylsiloxane.

[0088] Table 4 Formula of the Mud Mask

[0089]

[0090]

[0091] Example 5

[0092] This example provides a mud mask and its preparation method. The formula and preparation method of the mud mask are generally the same as those in Example 1, except that in this example, the addition amount of the first silica is 0.1%; the amount of water is adjusted adaptively, and the total mass of the mud mask is the same as that in Example 1.

[0093] Table 5 Formula of the Mud Mask

[0094]

[0095] Example 6

[0096] This example provides a mud mask and its preparation method. The formula and preparation method of the mud mask are generally the same as those in Example 1, except that in this example, the addition amount of the first silica is 0.8%; the amount of water is adjusted adaptively, and the total mass of the mud mask is the same as that in Example 1.

[0097] Table 6 Formula of the Mud Mask

[0098]

[0099] Comparative Example 1

[0100] This comparative example provides a mud mask and its preparation method. The formula and preparation method of the mud mask are generally the same as those in Example 1, except that in Comparative Example 1, the first silica is not added; the amount of water is adjusted adaptively, and the total mass of the mud mask is the same as that in Example 1.

[0101] Table 7 Formula of the Mud Mask

[0102]

[0103]

[0104] Comparative Example 2

[0105] This comparative example provides a mud mask and its preparation method. The formulation and preparation method of the mud mask are generally the same as those in Example 2, except that in Comparative Example 2, the first silica is not added; the amount of water is adjusted adaptively, and the total mass of the mud mask is the same as that in Example 2.

[0106] Table 8 Formulation of the Mud Mask

[0107]

[0108]

[0109] Comparative Example 3

[0110] This comparative example provides a mud mask and its preparation method. The formulation and preparation method of the mud mask are generally the same as those in Example 1, except that in Comparative Example 3, the first silica is replaced with the second silica.

[0111] Table 9 Formulation of the Mud Mask

[0112]

[0113] Comparative Example 4

[0114] This comparative example provides a mud mask and its preparation method. The formulation and preparation method of the mud mask are generally the same as those in Example 1, except that in Comparative Example 4, the first silica is replaced with magnesium aluminum silicate.

[0115] Table 10 Formulation of the Mud Mask

[0116]

[0117]

[0118] Comparative Example 5

[0119] This comparative example provides a mud mask and its preparation method. The formulation and preparation method of the mud mask are generally the same as those in Example 1, except that in Comparative Example 5, the first silica is replaced with modified corn starch.

[0120] Table 11 Formulation of the Mud Mask

[0121]

[0122]

[0123] Comparative Example 6

[0124] This comparative example provides a mud mask and its preparation method. The formulation and preparation method of the mud mask are generally the same as those in Example 1, except that in Comparative Example 6, the addition amount of the first silica is 5%; the amount of water is adjusted adaptively, and the total mass of the mud mask is the same as that in Example 1.

[0125] The addition amount of the first silica in Comparative Example 6 made the material very thick and hard, impossible to stir, and unable to prepare a mud film.

[0126] Comparative Example 7

[0127] This comparative example provides a mud film and its preparation method. The formula and preparation method of the mud film are generally the same as those in Example 1, except that in Comparative Example 7, the first silica is prepared as an oil phase component.

[0128] Verification Example

[0129] The mud films of Examples 1 to 6 and Comparative Examples 1 to 5 and 7 were subjected to a high-temperature stability test. The test method included: placing the mud film in a 250 g plastic bottle, and setting a control group and an experimental group respectively. The control group was placed in a normal-temperature and light-proof environment, and the laboratory was placed in an oven at 45 °C for one month and three months respectively.

[0130] The test results are as follows.

[0131] Examples 1, 2, 3, 4, and 6 passed the high-temperature stability test for 1 and 3 months, while Examples 5 and Comparative Examples 1, 2, 3, 4, 5, and 7 did not pass the high-temperature stability test for 1 and 3 months.

[0132] Figure 1 In the case of not adding a porous strong adsorption material, the water outlet situation of the mud film (Comparative Example 1) after one month of high-temperature stability (has returned to room temperature). The water separated out during high-temperature stability is within the red frame. Figure 2 In the case of adding 0.3% of the first silica, the water outlet situation of the mud film (Example 1) after one month of high-temperature stability (has returned to room temperature). It can be seen that the material is delicate and no water has separated out. See the water outlet situations of Comparative Examples 4 to 5 in Figures 3 to 4 .

[0133] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mud film composition, characterized in that: The invention comprises an oil phase component and a water phase component; the water phase component comprises a first silica, and the first silica comprises porous silica.

2. The mud film composition according to claim 1, characterized in that: The first silica includes: silica obtained by a gas phase process; Optionally, the first silica comprises:

200.

3. The mud film composition according to claim 1, characterized in that: The aqueous phase components include: water, polyol, illite, sodium potassium aluminum silicate, a second silica, an anionic emulsifier, EDTA-2Na and the first silica; Optionally, the polyol includes any one or more of 1,3-propanediol, glycerol, propylene glycol, butylene glycol, dipropylene glycol and methyl propylene glycol; Optionally, the anionic emulsifier includes: any one or more of sodium stearoyl glutamate, potassium cetyl phosphate and potassium lauryl phosphate; Optionally, the aqueous phase components include, by weight: 20 to 50 parts of water, 5 to 10 parts of polyol, 15 to 20 parts of Illite hydromica, 7 to 10 parts of potassium sodium aluminum silicate, 7 to 10 parts of the second silica, 0.1 to 1 part of anionic emulsifier, 0.01 to 1 part of EDTA-2Na and 0.1 to 1 part of the first silica; Optionally, the second silica includes: silica prepared by a precipitation process.

4. The mud film composition according to claim 1, characterized in that: The oil phase components include: emulsifier, co-emulsifier, oil and titanium dioxide; Optionally, the oil phase components include, by weight: 2 to 8 parts of emulsifier, 1 to 5 parts of co-emulsifier, 5 to 15 parts of oil and fat, and 1 to 5 parts of titanium dioxide; Optionally, the emulsifier includes any one or more of glyceryl stearate, PEG-100 stearate, sorbitan stearate, cetearyl olivate, sorbitan olivate, sorbitan sesquioleate, sorbitan octanoate, PEG-40 stearate, cetearyl glucoside, and C12-20 acid PEG-8 ester; Optionally, the auxiliary emulsifier includes: any one or more of cetearyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol; Optionally, the oil comprises: any one or more of C9-12 alkane, coconut oil caprylate / caprate, caprylic / capric triglyceride, ethylhexyl palmitate, hydrogenated polyisobutene, squalane, dicaprylyl carbonate, neopentyl glycol diheptanoate, isohexadecane, glyceryl tri(ethylhexanoate), polydimethylsiloxane, phenyl polytrimethicone, trimethylsiloxyphenyl polydimethicone, and diphenyl polydimethicone; Optionally, the titanium dioxide comprises CI 77891.

5. The mud film composition according to any one of claims 1 to 4, characterized in that: The mud mask composition also includes auxiliary materials; Optionally, the excipients include any one or more of preservatives and other active ingredients; the other active ingredients include any one or more of purslane extract, dipotassium glycyrrhizinate and Sophora flavescens root extract; Optionally, the preservative includes any one or more of phenoxyethanol, methylparaben, methylisothiazolinone, p-hydroxyacetophenone and 1,2-hexanediol; Optionally, in the mud mask composition, the weight percentage of the other active ingredients is 1% to 5%, and the weight percentage of the preservative is 0.1% to 5%.

6. A method for preparing a mud film, characterized in that: The method comprises mixing the mud film composition according to any one of claims 1 to 5.

7. The preparation method according to claim 6, characterized in that: The step of mixing the mud mask composition comprises: firstly mixing the water phase components in the mud mask composition to obtain a water phase, and mixing the oil phase components to obtain an oil phase; and emulsifying the oil phase and the water phase.

8. The preparation method according to claim 7, characterized in that: The step of mixing the aqueous phase components comprises: heating the mixture to 80-90° C. to obtain the aqueous phase; Optionally, the step of mixing the aqueous phase components comprises: firstly mixing the first silica and water in the aqueous phase, then adding other aqueous phase components, and heating to 80-90° C. after mixing to obtain the aqueous phase; Optionally, the step of mixing the oil phase components comprises: heating to 80-90° C. after mixing to obtain the oil phase; Optionally, before the mixing and emulsification, the preparation method further comprises keeping the aqueous phase at 80 to 90° C. for 10 to 20 minutes; Optionally, when the mud mask composition further comprises the auxiliary material as described in claim 5, the preparation method further comprises: after the mixing and emulsification, cooling the emulsified product to 40-60° C., and adding the auxiliary material; Optionally, when the excipients include preservatives and other active ingredients, the step of adding the excipients includes: first cooling the emulsified product to 50-60°C, adding preservatives, stirring evenly, and obtaining a first product; cooling the first product to 40-50°C, adding other active ingredients, stirring evenly, and obtaining a second product; cooling the second product to 35-45°C to obtain a mud film.

9. A mud film, characterized in that: The compound is prepared by the preparation method according to any one of claims 6 to 8.

10. The use of porous silica in the preparation of mud film is characterized by: The porous silica is the first silica described in claim 1 or 2.

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