A method for preparing and producing high-purity emulsion-type cosmetics

Abstract

This invention discloses a method for formulating and producing high-purity emulsion-type cosmetics, aiming to solve the problem that increasing the amount of emulsifier to ensure sufficient stability of the emulsion often leads to skin irritation. Furthermore, conventional processes result in emulsions with a wide and uneven particle size distribution, which negatively impacts the product's feel on the skin. The key technical points are: a method for formulating and producing high-purity emulsion-type cosmetics, comprising the following steps: emulsion oil phase preparation, emulsion aqueous phase preparation, nanocrystal seed preparation, emulsion preparation, dynamic pressure stirring, active microcapsule preparation, mixing and blending, and cooling and filling. This invention's method for formulating and producing high-purity emulsion-type cosmetics, through purification of oil and aqueous phase raw materials, addition of nano-silica with good compatibility with both oil and aqueous phases, dynamic stirring, and microcapsule technology, reduces the amount of emulsifier used while ensuring stability, and promotes the release and utilization rate of active ingredients.

Description

Technical Field

[0001] This invention relates to the field of cosmetic production technology, and more specifically, to a method for preparing and producing high-purity emulsion-type cosmetics. Background Technology

[0002] In the cosmetics manufacturing industry, emulsion-type cosmetics, as a common skincare category, occupy an important market position. Through unique formulas and processes, oil and water phases are blended together with emulsifiers to form a stable emulsion system. This emulsion system can fully exert its moisturizing and hydrating effects, providing strong support for people's daily skincare.

[0003] Traditional emulsion-type cosmetics manufacturing processes primarily rely on emulsifiers to achieve a stable blend of oil and water phases. In actual production, to ensure sufficient stability and prevent oil-water separation, the amount of emulsifier used is often increased. However, as a chemical substance, excessive addition of emulsifiers can irritate the skin, causing allergies, redness, and other discomfort, especially for people with sensitive skin, where this risk is more pronounced.

[0004] Furthermore, conventional emulsification processes result in emulsions with a wide particle size distribution. This uneven particle size distribution negatively impacts the skin feel of the product, reducing the user experience. It also affects the release of active ingredients; larger particles may encapsulate the active ingredients, hindering their full release and preventing emulsion-type cosmetics from achieving their intended efficacy. Therefore, developing an innovative method for formulating and producing high-purity emulsion-type cosmetics is of significant practical importance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a method for preparing and producing high-purity emulsion-type cosmetics. This method solves the problems of existing technologies, which often require increasing the amount of emulsifier to ensure sufficient stability of the emulsion, and the resulting emulsions with a wide and uneven particle size distribution, which negatively impacts the skin feel of the product and affects the release of active ingredients.

[0006] The above-mentioned technical objective of this invention is achieved through the following technical solution: a method for preparing and producing a high-purity emulsion-type cosmetic, comprising the following steps: S1: Preparation of the emulsion oil phase: Rosehip oil was selected as the raw material, and carbon dioxide was used as the supercritical fluid for extraction and purification at a pressure of 25 MPa and a temperature of 40℃ to obtain the emulsion oil phase. The specific process is as follows: First, 6 parts by weight of rosehip oil were prepared and placed in a supercritical fluid extraction device. Carbon dioxide was used as the supercritical fluid for extraction and purification at a pressure of 25 MPa and a temperature of 40℃ for 30 minutes to obtain high-purity rosehip oil. Selecting natural plant oils and then subjecting them to appropriate extraction and purification yields high-purity emulsion raw materials, reducing impurities at the source and playing a crucial role in achieving high product purity.

[0007] S2: Preparation of the aqueous phase of the emulsion: After deep purification treatment of 70-80 parts by weight of deionized water by passing it through a reverse osmosis membrane and an ion exchange resin, add 0.2-0.3 parts by weight of polysorbate-80, 0.5-1 parts by weight of sodium hyaluronate, 0.2-0.4 parts by weight of polyvinyl alcohol, and 0.5-1 parts by weight of ethylhexylglycerin, stir evenly, and control the temperature at about 65-75℃; The high deionized water content allows for deep purification by passing the deionized water through a reverse osmosis membrane and an ion exchange resin before preparation. This effectively removes impurities from the water, providing a good foundation for the subsequent preparation of high-quality emulsions.

[0008] S3: Preparation of nano-seedlings: 0.5-1 parts by weight of nano-silica and 8-12 parts by weight of the aqueous phase of the emulsion obtained in S2 above are placed together in an ultrasonic cell disruptor for ultrasonic treatment. The ultrasonic power is 200-300W and the treatment time is 10-15min to form a nano-seedling solution with a particle size between 10-50nm. S4: Preliminary emulsion preparation: The emulsion oil phase obtained in S1 and the nanocrystal seed solution obtained in S3 are heated to 60-70℃ respectively, and then the emulsion oil phase is slowly added to the nanocrystal seed solution to obtain a preliminary emulsion; S5: Dynamic pressure stirring: The preliminary emulsion obtained in S4 is transferred to a dynamic pressure stirring tank, and the pressure inside the tank is dynamically changed between 5-15MPa. At the same time, the stirring component is stirred at a speed of 800-1200rpm for 20-30min. The addition of nano-silica, which has good compatibility with both oil and water phases, allows it to be rapidly adsorbed at the oil-water interface and form a stable interfacial film due to its small particle size and high specific surface area. This promotes the dispersion of the oil and water phases, prevents oil-water separation, and maintains the stability of the oil-water mixture. Compared with traditional emulsification methods that rely solely on emulsifiers, this method can reduce the amount of emulsifier used while ensuring stability, thereby effectively reducing the risk of skin irritation.

[0009] Changes in dynamic pressure enhance fluid turbulence, subjecting emulsion droplets to compressive and tensile forces in different directions, thus promoting further droplet breakup and refinement. Simultaneously, the high-speed rotation of the stirring component facilitates rapid and uniform droplet dispersion. The synergistic effect of these two factors significantly improves the stability and uniformity of the emulsion.

[0010] S6: Preparation of active microcapsules: Using 0.3-0.5 parts by weight of coenzyme Q10 as the active ingredient, and 0.2-0.4 parts by weight of gum arabic and 0.2-0.4 parts by weight of maltodextrin as wall materials, the active ingredient is encapsulated into microcapsules using a spray drying method. The particle size of the microcapsules is within... between; Based on the fact that the uniform particle size distribution of the emulsion helps to improve the release of active ingredients, microencapsulation technology is used to protect the active ingredients, prevent them from being deactivated prematurely during storage and use, control the release rate of active ingredients, and enable them to work more continuously and effectively on the skin, thereby improving the utilization rate of active ingredients and giving full play to the efficacy of emulsion-type cosmetics.

[0011] S7: Mixing and Blending: Add the microcapsules obtained in S6 to the emulsion obtained in S5, then add 0.01-0.05 parts by weight of citric acid and 0.05-0.1 parts by weight of sodium chloride, stir evenly, and adjust the pH value of the emulsion to 5.5-7.0; S8: Cooling and Filling: The emulsion obtained in S7 is cooled to 25-30℃ and filled in a clean room using nitrogen as a protective gas.

[0012] In summary, the present invention has the following beneficial effects: Using natural plant oils and then appropriately extracting and purifying them to obtain high-purity emulsion raw materials reduces impurities at the source, which is a crucial step in achieving high product purity. The high deionized water content, after being deeply purified by passing it through a reverse osmosis membrane and ion exchange resin before preparation, effectively removes impurities and provides a good foundation for the subsequent preparation of high-quality emulsions. The addition of nano-silica, which has good compatibility with both oil and water phases, allows it to be rapidly adsorbed at the oil-water interface and form a stable interfacial film due to its small particle size and high specific surface area. This promotes the dispersion of the oil and water phases, prevents oil-water separation, and maintains the stability of the oil-water mixture. Compared with traditional emulsification methods that rely solely on emulsifiers, this method can reduce the amount of emulsifier used while ensuring stability, thereby effectively reducing the risk of skin irritation. Changes in dynamic pressure enhance fluid turbulence, subjecting emulsion droplets to compressive and tensile forces in different directions, thus promoting further droplet breakup and refinement. Simultaneously, the high-speed rotation of the stirring component facilitates rapid and uniform droplet dispersion. The synergistic effect of these two factors significantly improves the stability and uniformity of the emulsion. Based on the fact that the uniform particle size distribution of the emulsion helps to improve the release of active ingredients, microencapsulation technology is used to protect the active ingredients, prevent them from being deactivated prematurely during storage and use, control the release rate of active ingredients, and enable them to work more continuously and effectively on the skin, thereby improving the utilization rate of active ingredients and giving full play to the efficacy of emulsion-type cosmetics. Attached Figure Description

[0013] Figure 1 This is a process flow diagram of Embodiment 1 of the present invention. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0015] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "set up / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] The present invention will now be described in detail with reference to the accompanying drawings. Example 1:

[0018] A method for preparing and producing a high-purity emulsion-type cosmetic includes the following steps: S1: Preparation of the emulsion oil phase: Rosehip oil was selected as the raw material, and carbon dioxide was used as the supercritical fluid for extraction and purification at a pressure of 25 MPa and a temperature of 40℃ to obtain the emulsion oil phase. The specific process is as follows: First, 6 parts by weight of rosehip oil were prepared and placed in a supercritical fluid extraction device. Carbon dioxide was used as the supercritical fluid for extraction and purification at a pressure of 25 MPa and a temperature of 40℃ for 30 minutes to obtain high-purity rosehip oil. S2: Preparation of the aqueous phase of the emulsion: 75 parts by weight of deionized water were purified by passing it through a reverse osmosis membrane and an ion exchange resin in sequence. Then, 0.25 parts by weight of polysorbate-80, 0.8 parts by weight of sodium hyaluronate, 0.3 parts by weight of polyvinyl alcohol, and 0.8 parts by weight of ethylhexylglycerin were added and stirred evenly. The temperature was controlled at about 70°C. S3: Preparation of nano-seedlings: 0.8 parts by weight of nano-silica and 10 parts by weight of the aqueous phase of the emulsion obtained in S2 above are placed together in an ultrasonic cell disruptor for ultrasonic treatment. The ultrasonic power is 250W and the treatment time is 12min to form a nano-seedling solution with a particle size of 30nm. S4: Preliminary emulsion preparation: The emulsion oil phase obtained in S1 and the nanocrystal seed solution obtained in S3 are heated to 65°C respectively, and then the emulsion oil phase is slowly added to the nanocrystal seed solution to obtain a preliminary emulsion; S5: Dynamic pressure stirring: The preliminary emulsion obtained in S4 is transferred to a dynamic pressure stirring tank, and the pressure inside the tank is dynamically changed between 5-15MPa. At the same time, the stirring component is stirred at a speed of 1000rpm for 25min. S6: Preparation of active microcapsules: Using 0.4 parts by weight of coenzyme Q10 as the active ingredient, and 0.3 parts by weight of gum arabic and 0.3 parts by weight of maltodextrin as wall materials, the active ingredient was encapsulated into microcapsules using a spray drying method. The particle size of the microcapsules was within... between; S7: Mixing and Blending: Add the microcapsules obtained in S6 to the emulsion obtained in S5, then add 0.03 parts by weight of citric acid and 0.08 parts by weight of sodium chloride, stir evenly, and adjust the pH of the emulsion to 7.0; S8: Cooling and Filling: The emulsion obtained in S7 is cooled to 25°C and filled in a cleanroom using nitrogen as a protective gas.

[0019] Comparative Example 1: A method for preparing and producing a high-purity emulsion-type cosmetic includes the following steps: S1: Preparation of the oil phase of the emulsion: Rosehip oil was selected as the raw material; S2: Preparation of the aqueous phase of the emulsion: 75 parts by weight of deionized water, 0.25 parts by weight of polysorbate-80, 0.8 parts by weight of sodium hyaluronate, 0.3 parts by weight of polyvinyl alcohol, and 0.8 parts by weight of ethylhexylglycerin were stirred evenly, and the temperature was controlled at about 70°C. S3: Emulsion preparation: Heat the oil phase of the emulsion obtained in S1 and the aqueous phase of the emulsion obtained in S2 to 65°C respectively, and then slowly add the oil phase of the emulsion to the aqueous phase of the emulsion and stir normally until the mixture is uniform. S4: Mixing of active ingredients: Add 0.4 parts by weight of coenzyme Q10 to the emulsion obtained in S3, then add 0.03 parts by weight of citric acid and 0.08 parts by weight of sodium chloride, stir well, and adjust the pH of the emulsion to 7.0; S5: Cooling and Filling: The emulsion obtained in S7 is cooled to 25°C and filled in a cleanroom using nitrogen as a protective gas.

[0020] Experimental Results and Comparative Analysis 1. Centrifugal stability Example 1 Emulsion: No stratification was observed after centrifugation at 3000 r / min for 20 minutes, and the droplet size was uniform (D50≤100nm), indicating that the formulation and process of Example 1 significantly enhanced the structural stability of the emulsion.

[0021] Comparative Example 1 Emulsion: After centrifugation, the emulsion showed stratification, indicating that the emulsion prepared by the traditional process still has shortcomings in terms of refining emulsion particles and stability.

[0022] 2. Thermal / Cold Stability Example 1: The emulsion did not separate after being refrigerated at 4°C for one week and placed in a constant temperature incubator at 55°C for 24 hours, indicating that the emulsion is not sensitive to temperature changes.

[0023] Comparative Example 1 Emulsion: It deteriorated at high temperatures (such as discoloration and off-odor) and crystallized at low temperatures, indicating that the structure of emulsions prepared by traditional processes is easily destroyed at extreme temperatures.

[0024] 3. Impurity content Example 1 Emulsion: Lead content 2 mg / kg, mercury not detected, significantly lower than the national standard limit (lead ≤ 10 mg / kg), total bacterial count 100 CFU / g, mold / yeast not detected, meeting the requirements of cosmetic hygiene standards, indicating that the formula and process of Example 1 effectively removed heavy metals from the raw materials.

[0025] Comparative Example 1 Emulsion: Lead content reached 8 mg / kg, and total bacterial count reached 200 CFU / g, which is within the national standard range but close to the national standard limit.

[0026] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing and producing a high-purity emulsion-type cosmetic, characterized in that: Includes the following steps: S1: Preparation of the emulsion oil phase: Rosehip oil was selected as the raw material, and carbon dioxide was used as the supercritical fluid for extraction and purification at a pressure of 25 MPa and a temperature of 40℃ to obtain the emulsion oil phase. The specific process is as follows: First, 6 parts by weight of rosehip oil were prepared and placed in a supercritical fluid extraction device. Carbon dioxide was used as the supercritical fluid for extraction and purification at a pressure of 25 MPa and a temperature of 40℃ for 30 minutes to obtain high-purity rosehip oil. S2: Preparation of the aqueous phase of the emulsion: After deep purification treatment of 70-80 parts by weight of deionized water by passing it through a reverse osmosis membrane and an ion exchange resin, add 0.2-0.3 parts by weight of polysorbate-80, 0.5-1 parts by weight of sodium hyaluronate, 0.2-0.4 parts by weight of polyvinyl alcohol, and 0.5-1 parts by weight of ethylhexylglycerin, stir evenly, and control the temperature at about 65-75℃; S3: Preparation of nano-seedlings: 0.5-1 parts by weight of nano-silica and 8-12 parts by weight of the aqueous phase of the emulsion obtained in S2 above are placed together in an ultrasonic cell disruptor for ultrasonic treatment. The ultrasonic power is 200-300W and the treatment time is 10-15min to form a nano-seedling solution with a particle size between 10-50nm. S4: Preliminary emulsion preparation: The emulsion oil phase obtained in S1 and the nanocrystal seed solution obtained in S3 are heated to 60-70℃ respectively, and then the emulsion oil phase is slowly added to the nanocrystal seed solution to obtain a preliminary emulsion; S5: Dynamic pressure stirring: The preliminary emulsion obtained in S4 is transferred to a dynamic pressure stirring tank, and the pressure inside the tank is dynamically changed between 5-15MPa. At the same time, the stirring component is stirred at a speed of 800-1200rpm for 20-30min. S6: Preparation of active microcapsules: Using 0.3-0.5 parts by weight of coenzyme Q10 as the active ingredient, and 0.2-0.4 parts by weight of gum arabic and 0.2-0.4 parts by weight of maltodextrin as wall materials, the active ingredient is encapsulated into microcapsules using a spray drying method. The particle size of the microcapsules is within... between; S7: Mixing and Blending: Add the microcapsules obtained in S6 to the emulsion obtained in S5, then add 0.01-0.05 parts by weight of citric acid and 0.05-0.1 parts by weight of sodium chloride, stir evenly, and adjust the pH value of the emulsion to 5.5-7.0; S8: Cooling and Filling: The emulsion obtained in S7 is cooled to 25-30℃ and filled in a clean room using nitrogen as a protective gas.

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