Transparent emulsion with high oil content and preparation method thereof

Abstract

The invention discloses a high-oil-content transparent emulsion and a preparation method thereof. The high-oil-content transparent emulsion is prepared from the following main components in parts by weight: 41-46 parts of polyol, 16-30 parts of grease, 15-23 parts of water, 4-10 parts of a humectant, 4-8 parts of an emulsifier, 0.5-0.8 part of a preservative and 0.2-0.5 part of a thickener, and the pH value of the transparent emulsion is 5.0-7.5. The polyhydric alcohol is prepared from glycerol, 1, 3-propylene glycol, 1, 3-butanediol and 1, 2-pentanediol, and the grease is prepared from polydimethylsiloxane, isododecane, meadowfoam seed oil, isononyl isononanoate and pentaerythritol tetra (ethylhexanoate) ester.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics, and particularly relates to a transparent emulsion with a high oil content and a preparation method thereof. Background Art

[0002] Transparent emulsions are popular among consumers because of their transparent appearance. Common transparent emulsions are mainly microemulsions and nanoemulsions. The particle sizes of the two are generally between 5 and 200 nm, and some even have obvious blue opalescence.

[0003] Compared with traditional emulsions, microemulsions and nanoemulsions have the characteristics of large surface area and small particle size, which can enhance the penetration of active ingredients in the epidermis and dermis of the skin, and significantly improve the bioavailability of active ingredients. In addition, microemulsions have thermodynamic stability, which can resist the coarsening of particle size caused by Oswald ripening, flocculation, aggregation or gravity, so that the particle size will not change with the storage process; nanoemulsions have kinetic stability, and the particle size and distribution will not be affected by dilution or temperature changes, so both have extremely strong system stability.

[0004] Microemulsions and nanoemulsions often require special production processes or equipment. Microemulsions are mainly prepared by phase transition methods (phase transition temperature method, phase transition component method). Among them, the phase transition temperature method is greatly affected by the temperature of the system and requires precise control of the reaction temperature; the phase transition component method requires strict control of the dripping rate of the water phase. The preparation of nanoemulsions usually requires external energy to overcome the interfacial energy. This external energy can be high energy generated by mechanical force or chemical potential energy derived from system characteristics. Depending on the source of the external energy, the preparation method is divided into high-energy emulsification method and low-energy emulsification method. The high-energy emulsification method requires some special equipment, such as microfluidizers and ultrasonic emulsification equipment. The low-energy emulsification method is further divided into the phase transition temperature method and the spontaneous emulsification method. The spontaneous emulsification method is limited by factors such as oil phase viscosity, surfactant structure, and water solubility of organic solvents, and can only occur under specific conditions.

[0005] Because microemulsion and nanoemulsion related technologies have special requirements for production equipment and manufacturing processes, the application threshold is high and it is not easy to be applied to the production of cosmetics. In addition, under normal circumstances, the oil ratio of the emulsion is less than 10%, which greatly reduces its moisturizing effect; and the emulsion using the usual thickening system is often intolerant to strong ionic functional ingredients. Therefore, it is of great significance to develop a conventional equipment that can be produced without special processes and has high oil content, high moisturizing performance, and can add a high content of strong ionic functional active ingredients, and a transparent emulsion. Summary of the invention

[0006] The purpose of the present invention is to provide a transparent emulsion with a high oil content. The transparent emulsion provided by the present invention has a high oil content, excellent moisturizing performance, a moisturizing and non-greasy feel on the skin, and can be added with a high content of strong ionic functional ingredients.

[0007] To achieve the above object, the technical solution of the present invention is: A transparent emulsion with a high oil content mainly consists of the following components and their weight proportions: 41-46 parts of polyol, 16-30 parts of oil, 15-23 parts of water, 4-10 parts of moisturizer, 4-8 parts of emulsifier, 0.5-0.8 parts of preservative, 0.2-0.5 parts of thickener, and the pH of the transparent emulsion is 5.0-7.5. The polyols are glycerin, 1,3-propylene glycol, 1,3-butylene glycol, and 1,2-pentanediol. The oils are polydimethylsiloxane, isododecane, meadowfoam seed oil, isononyl isononanoate, and pentaerythrityl tetra(ethylhexanoate). The moisturizer is methyl gluceth-10. The emulsifier is (isostearyl alcohol (59wt%), butylene glycol cocoate (38wt%), and ethyl cellulose (3wt%)). The thickener is ammonium acryloyldimethyltaurate / VP copolymer. The preservatives are (phenoxyethanol (53wt%), methylparaben (16.5wt%), ethylparaben (11wt%), propylene glycol (10wt%), and ethylhexylglycerin (9.5wt%)).

[0008] Furthermore, the transparent emulsion mainly comprises the following components and their weight proportions: 42.75 parts of polyol, 26 parts of oil, 18.15 parts of water, 6 parts of moisturizer, 6 parts of emulsifier, 0.8 parts of preservative, and 0.3 parts of thickener.

[0009] Furthermore, the polyol is glycerol, 1,3-propylene glycol, 1,3-butylene glycol, and 1,2-pentanediol.

[0010] Furthermore, the oil is polydimethylsiloxane, isododecane, meadowfoam seed oil, isononyl isononanoate and pentaerythritol tetra(ethylhexanoate).

[0011] Furthermore, the moisturizing agent is methyl gluceth-10.

[0012] Furthermore, the emulsifier is (isostearyl alcohol (59wt%), butylene glycol cocoate (38wt%), ethyl cellulose (3wt%)).

[0013] Furthermore, the thickener is ammonium acryloyldimethyltaurate / VP copolymer.

[0014] Furthermore, the preservatives are (phenoxyethanol (53wt%), methylparaben (16.5wt%), ethylparaben (11wt%), propylene glycol (10wt%), ethylhexylglycerin (9.5wt%)).

[0015] The method for preparing the transparent emulsion with a high oil content comprises the following steps: S1 Add the thickener to the emulsifier, disperse it with polyol, then add the moisturizer, water and preservative, heat and stir to mix evenly. When the temperature of the emulsifier reaches 75±2℃, keep warm and stir for 20 minutes. At the same time, mix the oil and emulsifier evenly, heat to 75±2℃, keep warm and stir for 20 minutes.

[0016] After S2 insulation is finished, the equipment starts homogenization, adds the mixture of oil and emulsifier into the emulsification tank, and then keeps the temperature and homogenizes for 15 minutes.

[0017] After S3 completes heat preservation and homogenization, reduce the stirring speed and cool down to 40±2℃ while stirring. Discharge the material when there is no abnormality.

[0018] The stirring speed in step S1 is 80 rpm, the homogenizing speed in step S2 is 9000 rpm; and the stirring speed in step S3 is 40 rpm.

[0019] Compared with the prior art, the transparent emulsion provided by the present invention has the following advantages: The transparent emulsion provided by the invention has good transparency, spreadability, moisturizing property and skin feel.

[0020] (1) Good skin feel: The combination of hydrophilic and lipophilic materials makes the product have good spreadability and can achieve a non-greasy skin feel; (2) High safety: The system contains a small amount of surfactants, which will not cause irritation and dehydration problems on sensitive skin; (3) High oil compatibility: The system can accommodate a high content of oil and has excellent moisturizing properties; (4) High stability: The dense network in the system can protect the encapsulated active substances, has high chemical stability, and can tolerate high levels of ionic functional ingredients. The semi-solid nature of the two phases in the system can show higher thermodynamic and kinetic stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The appearance of the transparent emulsion prepared in Examples 1-3; Figure 2 This is the appearance of the transparent emulsion prepared in Comparative Examples 1-3; Figure 3 This is the appearance of the transparent emulsion prepared in Comparative Examples 4-6; Figure 4 This is the appearance of the transparent emulsion prepared in Comparative Examples 7-9; Figure 5This is the appearance of the transparent emulsion prepared in Comparative Examples 10-12. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below, but this is not a limitation of the present invention. All other implementation methods obtained by technical personnel in the field of technology based on the basic idea of ​​the present invention belong to the scope of protection of the present invention.

[0023] The raw materials used in the present invention are all commercially available cosmetic raw material products.

[0024] Example 1 A transparent emulsion with a high oil content is mainly composed of the following components and their weight parts: 41.25 parts of polyols, 30 parts of oils and fats, 15.9 parts of water, 4 parts of methyl gluceth-10 as a moisturizer, 8 parts of emulsifiers (isostearyl alcohol (59wt%), butylene glycol cocoate (38wt%), ethyl cellulose (3wt%)), 0.65 parts of preservatives (phenoxyethanol (53wt%), methylparaben (16.5wt%), ethylparaben (11wt%), propylene glycol (10wt%), ethylhexylglycerin (9.5wt%)), and 0.2 parts of thickener ammonium acryloyldimethyltaurate / VP copolymer. The theoretical calculated value of the total refractive index of the oil phase is greater than the theoretical calculated value of the total refractive index of the water phase by 0.005.

[0025] The polyols are 17.25 parts of glycerol, 14 parts of 1,3-propylene glycol, 8 parts of 1,3-butylene glycol, and 2 parts of 1,2-pentanediol.

[0026] The oil is 12 parts of polydimethylsiloxane, 9.5 parts of isododecane, 5.5 parts of meadowfoam seed oil, 2 parts of isononyl isononanoate and 1 part of pentaerythritol tetra(ethylhexanoate).

[0027] The method for preparing the transparent emulsion with a high oil content comprises the following steps: S1 Add the thickener to the emulsifier, disperse it with polyol, then add the moisturizer, water and preservative, heat and stir to mix evenly. When the temperature of the emulsifier reaches 75±2℃, keep warm and stir for 20 minutes. At the same time, mix the oil and emulsifier evenly, heat to 75±2℃, keep warm and stir for 20 minutes.

[0028] After S2 insulation is finished, the equipment starts homogenization, adds the mixture of oil and emulsifier into the emulsification tank, and then keeps the temperature and homogenizes for 15 minutes.

[0029] After S3 completes heat preservation and homogenization, reduce the stirring speed and cool down to 40±2℃ while stirring. Discharge the material when there is no abnormality.

[0030] The stirring speed in step S1 is 80 rpm, the homogenizing speed in step S2 is 9000 rpm; and the stirring speed in step S3 is 40 rpm.

[0031] Example 2 A transparent emulsion with a high oil content is mainly composed of the following components and their weight parts: 42.75 parts of polyols, 26 parts of oils and fats, 18.15 parts of water, 6 parts of methyl gluceth-10 as a moisturizer, 6 parts of emulsifiers (isostearyl alcohol (59wt%), butylene glycol cocoate (38wt%), ethyl cellulose (3wt%)), 0.8 parts of preservatives (phenoxyethanol (53wt%), methylparaben (16.5wt%), ethylparaben (11wt%), propylene glycol (10wt%), ethylhexylglycerol (9.5wt%)), and 0.3 parts of thickener ammonium acryloyldimethyltaurate / VP copolymer. The theoretical calculated value of the total refractive index of the oil phase is greater than the theoretical calculated value of the total refractive index of the water phase by 0.005.

[0032] The polyols are 18.75 parts of glycerol, 14 parts of 1,3-propylene glycol, 8 parts of 1,3-butylene glycol, and 2 parts of 1,2-pentanediol.

[0033] The oil is 10 parts of polydimethylsiloxane, 8.5 parts of isododecane, 4.5 parts of meadowfoam seed oil, 2 parts of isononyl isononanoate and 1 part of pentaerythritol tetra(ethylhexanoate).

[0034] The preparation method of the transparent emulsion is the same as that of Example 1.

[0035] Example 3 A transparent emulsion with a high oil content is mainly composed of the following components and their weight parts: 46 parts of polyols, 16 parts of oils and fats, 23 parts of water, 10 parts of methyl gluceth-10 as a moisturizer, 4 parts of emulsifiers (isostearyl alcohol (59wt%), butylene glycol cocoate (38wt%), ethyl cellulose (3wt%)), 0.5 parts of preservatives (phenoxyethanol (53wt%), methylparaben (16.5wt%), ethylparaben (11wt%), propylene glycol (10wt%), ethylhexylglycerin (9.5wt%)), and 0.5 parts of thickener ammonium acryloyldimethyltaurate / VP copolymer. The theoretical calculated value of the total refractive index of the oil phase is greater than the theoretical calculated value of the total refractive index of the water phase by 0.005.

[0036] The polyol is 22 parts of glycerol, 14 parts of 1,3-propylene glycol, 8 parts of 1,3-butylene glycol and 2 parts of 1,2-pentanediol.

[0037] The oil is 6 parts of polydimethylsiloxane, 7 parts of isododecane, 2 parts of meadowfoam seed oil, 0.5 parts of isononyl isononanoate and 0.5 parts of pentaerythritol tetra(ethylhexanoate).

[0038] The preparation method of the transparent emulsion is the same as that of Example 1.

[0039] Comparative Example 1 The formula composition of the transparent emulsion is similar to that of Example 2, and the difference from Example 2 is that in the formula composition, the content of glycerol is increased from 18.75 parts to 21.23 parts, the content of water is reduced from 18.15 parts to 15.67 parts, and the theoretical calculated value of the total refractive index of the oil phase is equal to the theoretical calculated value of the total refractive index of the water phase.

[0040] The preparation method of the transparent emulsion is the same as that of Example 2.

[0041] Comparative Example 2 The formula composition of the transparent emulsion is similar to that of Example 2, and the difference from Example 2 is that in the formula composition, the content of glycerol is reduced from 18.75 parts to 16.25 parts, the content of water is increased from 18.15 parts to 20.65 parts, and the theoretical calculated value of the total refractive index of the oil phase is greater than the theoretical calculated value of the total refractive index of the water phase by 0.01.

[0042] The preparation method of the transparent emulsion is the same as that of Example 2.

[0043] Comparative Example 3 The formula composition of the transparent emulsion is similar to that of Example 2, and the difference from Example 2 is that in the formula composition, 0.3 parts of the thickener ammonium acryloyldimethyltaurate / VP copolymer is replaced with 0.3 parts of carbomer, and 0.3 parts of arginine is additionally added for neutralization, and the water content is adjusted to 17.85 parts.

[0044] The preparation method of the transparent emulsion is similar to that of Example 2, except that, after cooling to 50±2° C. in step S3, homogenization is started at 6000 rpm, 3 portions of 10 wt % arginine aqueous solution are added and homogenized for 2 min, and then the temperature is cooled to 40±2° C., and the material is discharged after no abnormality is observed.

[0045] Comparative Example 4 The formula composition of the transparent emulsion is similar to that of Example 2, and the difference from Example 2 is that in the formula composition, 0.3 parts of the thickener ammonium acryloyldimethyltaurate / VP copolymer is replaced with 0.3 parts of acrylic acid (ester) / C10-30 alkyl acrylate cross-linked polymer, and 0.3 parts of arginine is additionally added for neutralization, and the water content is adjusted to 17.85 parts.

[0046] The preparation method of the transparent emulsion is similar to that of Example 2, except that, after cooling to 50±2° C. in step S3, homogenization is started at 6000 rpm, 3 portions of 10 wt % arginine aqueous solution are added and homogenized for 2 min, and then the temperature is cooled to 40±2° C., and the material is discharged after no abnormality is observed.

[0047] Comparative Example 5 The formula composition of the transparent emulsion is similar to that of Example 2, and the difference from Example 2 is that in the formula composition, 6 parts of the emulsifier (isostearyl alcohol (59wt%), butylene glycol cocoate (38wt%), ethyl cellulose (3wt%)) are replaced with 6 parts of (polyglycerol-2 stearate (50wt%); glyceryl stearate (30wt%); stearyl alcohol (20wt%)).

[0048] The preparation method of the transparent emulsion is the same as that of Example 2.

[0049] Comparative Example 6 The formula composition of the transparent emulsion is similar to that of Example 2, and the difference from Example 2 is that in the formula composition, 6 parts of emulsifiers (isostearyl alcohol (59wt%), butylene glycol cocoate (38wt%), ethyl cellulose (3wt%)) are replaced with 6 parts (glyceryl stearate (50wt%), PEG-100 stearate (50wt%)).

[0050] The preparation method of the transparent emulsion is the same as that of Example 2.

[0051] Comparative Example 7 The formula composition of the transparent emulsion is the same as that of Example 2.

[0052] The preparation method of the transparent emulsion is similar to that of Example 2, except that the homogenization speed in step S2 is reduced from 9000 rpm to 6000 rpm.

[0053] Comparative Example 8 The formula composition of the transparent emulsion is similar to that of Example 3, except that the addition amount of the emulsifier (isostearyl alcohol (59 wt %), butylene glycol cocoate (38 wt %), ethyl cellulose (3 wt %)) is reduced from 4 parts to 1 part, and water is used to supplement the percentage of the reduced emulsifier.

[0054] The preparation method of the transparent emulsion is the same as that of Example 3.

[0055] Comparative Example 9 The formula composition of the transparent emulsion is similar to that of Example 1, and the difference from Example 1 is that the thickener ammonium acryloyldimethyltaurate / VP copolymer is reduced from 0.2 parts to 0.05 parts, and water is used to supplement the percentage of the reduced thickener.

[0056] The preparation method of the transparent emulsion is the same as that of Example 1.

[0057] Comparative Example 10 The formula composition of the transparent emulsion is similar to that of Example 3, and the difference from Example 3 is that the thickener ammonium acryloyldimethyltaurate / VP copolymer is increased from 0.5 parts to 0.8 parts, and the percentage of the increase in thickener is deducted from the water.

[0058] The preparation method of the transparent emulsion is the same as that of Example 3.

[0059] Comparative Example 11 The formula composition of the transparent emulsion is similar to that of Example 3, and the difference from Example 3 is that the isododecane in the oil is reduced from 7 parts to 4 parts, the white meadowfoam seed oil is reduced from 2 parts to 0 parts, the isononyl isononanoate is reduced from 0.5 parts to 0 parts, and the pentaerythritol tetra(ethylhexanoate) is reduced from 0.5 parts to 0 parts, and water is increased by 6 parts to supplement the percentage of oil reduction.

[0060] The preparation method of the transparent emulsion is the same as that of Example 3.

[0061] Comparative Example 12 The formula composition of the transparent emulsion is similar to that of Example 1, and the difference from Example 1 is that the amount of meadowfoam seed oil is increased from 5.5 parts to 8.5 parts, and the amount of water is reduced by 3 parts, deducting the percentage of increased oil.

[0062] The preparation method of the transparent emulsion is the same as that of Example 1.

[0063] Test Example 1: Product Appearance Transparency Evaluation The test results are shown in Figure 1-Figure 5 .

[0064] Depend on Figure 1-Figure 5It can be seen that Example 1, Example 2, and Example 3 have good transparency by adjusting the theoretical calculated value of the total refractive index of the oil phase to be slightly higher than the theoretical calculated value of the total refractive index of the water phase of 0.005; Comparative Example 1 and Comparative Example 2 respectively adjust the theoretical calculated value of the total refractive index of the oil phase to be equal to the theoretical calculated value of the total refractive index of the water phase and the theoretical calculated value of the total refractive index of the oil phase to be greater than the theoretical calculated value of the total refractive index of the water phase of 0.010, and the transparency is reduced to varying degrees; Compared with Example 2, Comparative Examples 3 and Comparative Examples 4 respectively replace the thickeners with carbomer and acrylic acid (ester) / C10-30 Alkyl acrylate cross-linked polymer, the emulsion appearance is opaque; compared with Example 2, Comparative Examples 5 and 6 respectively replace the emulsifier (the emulsifier used in the example is at the interface of the water phase and the oil phase and does not enter the other phase (i.e., it has no water-oil amphiphilicity)) with an emulsifier with water-oil amphiphilicity, and the sample has a milky white and opaque appearance; compared with Example 2, Comparative Example 7 reduces the homogenization speed, resulting in water-oil stratification of the product; compared with Example 3, Comparative Example 8 reduces the amount of emulsifier added, resulting in water-oil stratification of the product; compared with Example 1 and Example 3, Comparative Examples 9 and 10 respectively reduce and increase the thickener, and the formula with reduced thickener precipitates a small amount of oil on the surface, and the formula with increased thickener has too high a viscosity and is a semi-permeable paste; compared with Example 1 and Example 3, Comparative Examples 11 and 12 respectively reduce and increase the oil content, and the transparency of the two schemes is reduced to varying degrees. Therefore, it can be concluded that there are three key points in the transparency appearance of the emulsion prepared by the system of this embodiment: ① It is necessary to control the theoretical calculated value of the total refractive index of the oil phase and the theoretical calculated value of the total refractive index of the water phase to maintain a certain difference; ② It is necessary to select a suitable and appropriate amount of thickener ammonium acryloyldimethyltaurate / VP copolymer; ③ It is necessary to select an emulsifier (isostearyl alcohol (59wt%), butylene glycol cocoate (38wt%), ethyl cellulose (3wt%)) that is not amphiphilic (i.e., cannot enter the other phase).

[0065] Test Example 2: Safety Test Safety evaluation method: multiple (acute) skin irritation test.

[0066] Test results: See Table 1 for the results.

[0067] Table 1 Transparent emulsion safety test results As can be seen from the above table, the formulas of Example 1, Example 2, and Example 3 are relatively safe, mild, and low in irritation.

[0068] Test Example 3: Stability Test Stability test method ①: Take about 30g of the transparent emulsion samples of Example 1, Example 2, and Example 3 in a 50ml transparent inspection bottle, place it in a 50±1℃ oven for 6 months, and observe the appearance of the sample after returning to room temperature to detect its heat resistance; place it in a (48±1℃)- (-15±1℃) high and low temperature alternating test box for 3 months, and observe the appearance of the sample after returning to room temperature to detect its resistance to alternating cold and heat; place it in a -15±1℃ oven for 3 months, and observe the appearance of the sample after returning to room temperature to detect its cold resistance. The test results are shown in Table 2.

[0069] Table 2 Transparent emulsion stability test results Stability test method ②: Take 100g of the transparent emulsions of Example 1, Example 2, and Example 3 and a commercially available conventional emulsion, add 10g of a high ionic active substance (10wt% PCA zinc aqueous solution) to each of the four emulsions, stir evenly, and observe the changes in their appearance at room temperature. The test results are shown in Table 3.

[0070] Table 3 Ion resistance test results of transparent emulsion and commercial emulsion As can be seen from Table 2 and Table 3, the heat resistance, hot and cold alternation, and cold resistance of Example 1, Example 2, and Example 3 are all normal, and have good stability; compared with commercially available emulsions, Example 1, Example 2, and Example 3 have excellent ion resistance. This shows that Example 1, Example 2, and Example 3 have high thermodynamic and kinetic stability and good ion tolerance.

[0071] Test Example 4: Skin Feel Evaluation Skin feel evaluation method: 30 volunteers were selected. After cleansing, appropriate amounts of the formula samples of Example 1, Example 2, and Example 3 were applied to the facial skin and massaged until absorbed. After the trial was completed, a trial questionnaire was filled out and scored using a 7-point system. The higher the score, the better the satisfaction. The evaluation indicators included the preference for spreadability when applying the product, the preference for absorption speed, the preference for the sticky feeling of the skin after the product was absorbed, the preference for the silky feeling of the skin after the product was absorbed, and the overall evaluation.

[0072] Test results: See Table 4 for the results.

[0073] Table 4 Skin feel evaluation results From the skin feel evaluation results of the volunteers in Table 4, it can be seen that the spreadability, absorption speed, stickiness, and silkiness of Examples 1 and 2 were highly evaluated, and the overall stickiness of Example 3 was slightly improved and the score was slightly reduced because the amount of glycerin added was increased. This shows that Examples 1, 2, and 3 can have good skin feel under the premise of high oil content.

[0074] Test Example 5: Moisturizing performance test Moisturizing performance test method: The test uses the weighing method to test the water loss rate to characterize the water retention capacity of the moisturizer, thereby characterizing the ability of cosmetics and their raw materials to retain moisture. The greater the water loss rate, the worse the water retention of the moisturizer. The smaller the water loss rate, the stronger the water retention of the moisturizer and the better the long-term moisturizing effect.

[0075] Test results: See Table 5 for the results.

[0076] Table 5 Moisturizing test results Under the same test conditions, the water loss rates of Example 1, Example 2, and Example 3 are all less than 100% glycerin in different time periods, and glycerin can increase the moisture content of the skin and reduce the moisture loss of the skin, and has a good moisturizing effect. Therefore, the product has a good moisturizing effect; and the water loss rates of Example 1, Example 2, and Example 3 are all less than the water loss rates of commercially available moisturizing creams in different time periods, indicating that the moisturizing effects of Example 1, Example 2, and Example 3 are better than those of commercially available moisturizing creams.

[0077] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field who attempts to make appropriate modifications or improvements within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A transparent emulsion with a high oil content, characterized in that: The main components include, by weight: 41-46 parts of polyols, 16-30 parts of oils and fats, 15-23 parts of water, 4-10 parts of moisturizers, 4-8 parts of emulsifiers, 0.5-0.8 parts of preservatives, and 0.2-0.5 parts of thickeners. The pH value of the transparent emulsion is 5.0-7.

5. The polyols are composed of glycerol, 1,3-propylene glycol, 1,3-butylene glycol, and 1,2-pentanediol, and the oils and fats are composed of polydimethylsiloxane, isododecane, meadowfoam seed oil, isononyl isononanoate, and pentaerythritol tetra(ethylhexanoate).

2. The transparent emulsion according to claim 1, characterized in that The main components include, by weight: 42.75 parts of polyol, 26 parts of oil, 18.15 parts of water, 6 parts of moisturizer, 6 parts of emulsifier, 0.8 parts of preservative and 0.3 parts of thickener.

3. The transparent emulsion according to claim 1, characterized in that The moisturizing agent is methyl gluceth-10.

4. The transparent emulsion according to claim 1, characterized in that The emulsifier is composed of 59 wt% of isostearyl alcohol, 38 wt% of butylene glycol cocoate and 3 wt% of ethyl cellulose.

5. The transparent emulsion according to claim 1, characterized in that The thickener is ammonium acryloyldimethyltaurate / VP copolymer.

6. The transparent emulsion according to claim 1, characterized in that The preservative is composed of 53 wt % of phenoxyethanol, 16.5 wt % of methylparaben, 11 wt % of ethylparaben, 10 wt % of propylene glycol and 9.5 wt % of ethylhexylglycerin.

7. The method for preparing a transparent emulsion with a high oil content according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Add the thickener into the emulsifier, disperse it with polyol, then add the moisturizer, water and preservative, heat and stir to mix evenly, when the temperature of the emulsifier reaches 75±2℃, keep warm and stir for 20min; at the same time, mix the oil and emulsifier evenly, heat to 75±2℃, keep warm and stir for 20min; After S2 is finished, the equipment starts homogenization, adds the mixture of grease and emulsifier into the emulsification tank, and then keeps the temperature and homogenizes for 15 minutes; After S3 completes heat preservation and homogenization, reduce the stirring speed, cool down to 40±2°C while stirring, and then discharge.

8. The preparation method according to claim 7, characterized in that: The stirring speed in step S1 is 80 rpm, the homogenizing speed in step S2 is 9000 rpm; and the stirring speed in step S3 is 40 rpm.

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