Water-emulsion double-layer aqueous solution and preparation method therefor

Abstract

Provided in the present application are a water-emulsion double-layer aqueous solution and a preparation method therefor. The water-emulsion double-layer aqueous solution comprises the following components in percentages by weight: 60.9-96.19% of water, 0.1-2.5% of an emulsifying agent, 3-15% of an emollient, 0.3-10% of a humectant, 0.3-10% of a skin-conditioning agent, 0.01-0.1% of a pH conditioning agent, and 0.1-1.5% of a preservative, wherein the emulsifying agent comprises sodium dilauramidoglutamide lysine and a Glycine soja seed extract. In the present application, sodium dilauramidoglutamide lysine and the Glycine soja seed extract are compounded as the emulsifying agent, which does not contain a PEG group and has good safety. The emulsifying capacity is high; and after the water-emulsion double-layer aqueous solution, which is prepared without the addition of a thickening agent, is left to stand for quite a long period of time, the upper-layer emulsion thereof can still maintain very good stability, and the aqueous solution does not have the quality problems of other similar products, such as an oil component being separated from an upper layer, the phenomenon of oil-water separation, and a coarsened texture of an emulsion.

Description

A water-emulsion double-layer water preparation and its preparation method Technical Field

[0001] The present application relates to the field of skin care products, and in particular to a water-emulsion double-layer water preparation and a preparation method thereof. Background Art

[0002] Aqueous solutions offer benefits such as moisturizing, nourishing, and softening the skin, making them a commonly used cosmetic formulation. However, conventional aqueous solutions are often transparent or translucent, have significant formulation limitations, cannot contain oil-soluble ingredients, and have a relatively simple appearance, failing to meet consumer demand for novel and unique designs. Two-layer aqueous solutions are also available on the market, with a lower water phase and an upper oil phase, which are shaken thoroughly before use. However, these lack emulsifiers, leading to rapid separation of the two phases. This can easily lead to consumers only pouring out the upper oil phase, resulting in a poor user experience.

[0003] There are also some water-emulsion double-layer products on the market. Chinese patent CN107929229B discloses a double-layer emulsion. The emulsifier includes inulin lauryl carbamate, with a weight percentage of 0.1-1%. Other components include 5-30% oil phase, 0.3-10% moisturizer, and 0.01-0.2% stabilizer. The double-layer emulsion in this application begins to separate after 5-30 minutes and completely separates after 60-17280 minutes. It has a beautiful appearance, good spreadability, and a refreshing skin feel. However, some examples contain silicone oil ingredients. Some consumers now pursue natural ingredients and do not like to use cosmetics containing silicone oil. Moreover, the separation time of most examples is relatively long, which does not meet consumers' demand for product appearance.

[0004] Chinese patent CN105147528A discloses a water-emulsion double-layer essence emulsion and its preparation method. The double-layer essence emulsion has a novel and beautiful appearance, can achieve rapid stratification, has stable emulsion properties, and has good moisturizing performance. The double-layer essence emulsion of this application is composed of cyclopentasiloxane, lubricant gum, isododecane, pentaerythritol tetra(ethylhexanoate), butylene glycol, propylene glycol, glyceryl polyether-26, glycerin, oat beta-glucan, North American witch hazel water, phenyl trimethicone, phenoxyethanol, PEG-6 caprylic / capric glycerides, thickener, caprylyl glycol / ethylhexylglycerin, methylparaben, butylated hydroxytoluene, sodium hyaluronate, colorant, and water. The emulsifier used in this application is PEG-6 caprylic / capric glycerides, and the oil contains two silicone oil components. Because PEG-6 caprylic / capric glycerides contain PEG groups, there may be dioxane residues. Dioxane easily penetrates the skin and is considered a probable human carcinogen by the U.S. Environmental Protection Agency. Consequently, consumers are reluctant to use products that may contain dioxane.

[0005] The layered emulsion described in the above patent should be in the form of a lotion, because the national standard for skin care lotions GB / T29665-2013 stipulates that the appearance of the emulsion cannot be layered, while the national standard for lotions QB / T2660-2004 stipulates a multi-layer appearance.

[0006] The double-layer water-based formulations currently on the market have the following problems: (1) They do not contain emulsifiers, and the water and oil phases separate too quickly. During use, it is easy to pour out only the upper oil phase, which is not a good experience; (2) The ingredients contain silicone oil or emulsifiers containing PEG groups, which consumers are more resistant to; (3) Stabilizers or thickeners are added, and the separation time is too long, resulting in a poor appearance; (4) The properties are unstable, and oil will precipitate on the surface or the emulsion will be rough and not smooth. Application Contents

[0007] The present invention provides a water-emulsion double-layer aqueous solution that does not contain silicone oil or thickener, has safe ingredients, can be quickly separated into layers, and has stable emulsion properties, and a preparation method thereof, in order to solve the problems existing in the related art. The technical solution is as follows:

[0008] In a first aspect, an embodiment of the present application provides a water-emulsion double-layer water preparation, comprising the following components, by weight percentage: 60.9% to 96.19% water, 0.1% to 2.5% emulsifier, 3% to 15% emollient, 0.3% to 10% moisturizer, 0.3% to 10% skin conditioner, 0.01% to 0.1% pH adjuster, and 0.1% to 1.5% preservative;

[0009] The emulsifier includes sodium di(laurylamide glutamine) lysine and wild soybean seed extract.

[0010] In one embodiment, the emollient includes one or more of isohexadecane, squalane, hydrogenated polydecene, neopentyl glycol diheptanoate, ethylhexyl palmitate, C13-16 isoparaffin, glyceryl tri(ethylhexanoate), cetyl ethylhexanoate, isononyl isononanoate, mineral oil, utilitarian fruit oil, octyldodecanol, jojoba seed oil, grape seed oil, and isopropyl myristate.

[0011] In one embodiment, the moisturizing agent includes one or more of glycerin, butylene glycol, 1,3-propylene glycol, betaine, dipropylene glycol, glycereth-26, erythritol, methylpropanediol, hydroxyethyl urea, sodium polyglutamate, fructan, and trehalose.

[0012] In one embodiment, the skin conditioning agent includes one or more of bisabolol, tocopherol, β-glucan, niacinamide, biosaccharide gum-1, sodium polyaspartate, glyceryl glucoside, dipotassium glycyrrhizate, glutathione, matrine, corn gluten amino acids, purslane extract, carnosine, acetyl glucosamine, and aloe barbadensis leaf juice.

[0013] In one embodiment, the pH adjuster includes one or more of triethanolamine, potassium hydroxide, arginine, sodium hydroxide, citric acid, and sodium citrate.

[0014] In one embodiment, the preservative includes one or more of methylparaben, propylparaben, chlorphenesin, phenoxyethanol, ethylhexylglycerin, hexamidine diisothionate, and benzyl alcohol.

[0015] In one embodiment, the invention comprises the following components: 0.1% to 0.3% sodium di(laurylamide glutamine) lysine, 0.2% to 0.6% glycine soja seed extract, 2% to 4% isohexadecane, 2% to 4% squalane, 2% to 4% C13-16 isoparaffin, 0.1% to 0.3% tocopherol, 1% to 4% butylene glycol, 2% to 4% glycerol, 0.01% to 0.1% sodium polyglutamate, 1% to 4% purslane extract, 1% to 4% beta-glucan, 1% to 3% glyceryl glucoside, 0.01% to 0.05% arginine, 0.3% to 1.0% phenoxyethanol, 0.1% to 0.5% ethylhexylglycerin, and the balance water.

[0016] In a second aspect, the present invention provides a method for preparing a water-emulsion double-layer aqueous solution, which comprises:

[0017] (1) Add the raw materials of phase A: water, butylene glycol, glycerin, sodium polyglutamate, sodium di(laurylamide glutamine) lysine, and wild soybean seed extract into the emulsifier in sequence, stir, heat up and keep warm;

[0018] (2) Add the raw materials of phase B: isohexadecane, squalane, C13-16 isoparaffin, and tocopherol into the oil phase pot, stir and mix, and heat;

[0019] (3) Vacuuming the mixture of step (2) into the mixture of step (1), homogenizing, stirring, and cooling;

[0020] (4) Add the raw materials of phase C: phenoxyethanol and ethylhexylglycerin into the emulsifier, stir and cool;

[0021] (5) Add the raw materials of phase D: β-glucan, glycerol glucoside, purslane extract and arginine into the emulsifier in sequence, stir evenly, and filter out the material after passing the inspection.

[0022] In one embodiment, it includes:

[0023] (1) Add the raw materials of phase A: water, butylene glycol, glycerin, sodium polyglutamate, sodium di(laurylamide glutamine) lysine, and wild soybean seed extract into the emulsifier in sequence, stir and heat to 80°C, and keep warm for 20 minutes;

[0024] (2) Add the raw materials of phase B: isohexadecane, squalane, C13-16 isoparaffin, and tocopherol (vitamin E) into the oil phase pot, stir and mix, and heat to 80°C;

[0025] (3) Vacuum the mixture from step (2) into the mixture from step (1), homogenize for 5-10 minutes, and cool with stirring to 60°C;

[0026] (4) Add the raw materials of phase C: phenoxyethanol and ethylhexylglycerin into the emulsifier, stir and cool to below 45°C;

[0027] (5) Add the raw materials of phase D: β-glucan, glycerol glucoside, purslane extract and arginine into the emulsifier in sequence, stir evenly, and filter out the material after passing the inspection.

[0028] In one embodiment, it further includes:

[0029] (6) Filling, packaging, and coding;

[0030] (7) After passing the inspection, the goods will be put into storage.

[0031] The advantages or beneficial effects of the above technical solution include at least:

[0032] 1. This application utilizes a combination of sodium di(laurylamide glutamine) lysine and glycine soja (Soybean) seed extract as an emulsifier. This formulation does not contain PEG groups and offers excellent safety. It exhibits strong emulsifying properties. Even without the addition of a thickener, the resulting water-in-water emulsion maintains excellent stability in the upper layer after prolonged standing, without the quality issues often seen in similar products, such as oily separation, oil-water separation, and thickening. Sodium di(laurylamide glutamine) lysine has a double-chain structure, forming a double-layered structure on the surface of the emulsified particles. The resulting interfacial film is relatively loose and generally stable. The addition of glycine soja (Soybean) seed extract, with its single-chain structure, allows the molecules in the double-layered structure of sodium di(laurylamide glutamine) lysine to aggregate and align, creating a denser and more compact structure and enhancing the strength of the interfacial film. Therefore, after the combination of sodium di(laurylamide glutamine) lysine and Glycine Soja (Glycine Soja) seed extract, the prepared emulsified particles have smaller particle size, more uniformity, and good stability, which is significantly better than using sodium di(laurylamide glutamine) lysine or Glycine Soja (Glycine Soja) seed extract alone.

[0033] 2. This application does not contain silicone oil ingredients, which can meet the personalized needs of consumers. By using C13-16 isoparaffin instead of silicone oil ingredients, it achieves a smooth skin feel close to that of silicone oil without containing silicone oil.

[0034] 3. The water-based emulsion of the present application, after being shaken evenly, begins to separate after about 3 minutes of standing, and completely separates into two layers after about 15 minutes, achieving rapid separation. The upper layer is the emulsion and the lower layer is the aqueous solution. The aqueous solution is temporarily translucent, and the layer interface is clear. After about 12 hours, the lower layer becomes a transparent and clear aqueous solution. The double-layer emulsion disclosed in Chinese patent CN107929229B begins to separate after 5-30 minutes of shaking evenly, and completely separates after 60-17280 minutes. This prolonged separation time affects the product appearance.

[0035] 4. This dual-layer water-emulsion formulation can replace toner and lotion, reducing skincare steps and saving time, which is in line with today's hectic lifestyle. It contains a variety of nourishing ingredients, including β-glucan, glyceryl glucoside, and purslane extract, to make skin healthier, plumper, and more elastic.

[0036] 5. The formulation system of this application can be added with various active ingredients in the water phase or oil phase. The flexibility of the formulation is much greater than that of conventional aqueous products, and it is suitable for use as a matrix for various functional products.

[0037] 6. All ingredients in the double-layer water-emulsion formula of this application have low ingredient safety scores on the Beauty Practice app (a higher score indicates a greater risk), earning them the Green label, making them all Beauty Practice all-green products. In recent years, many consumers have used Beauty Practice to check the safety of their cosmetics. Beauty Practice all-green products are safe and can be used with confidence.

[0038] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the following detailed description. Implementation Method

[0039] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the description is considered to be illustrative and non-restrictive in nature.

[0040] In a first aspect, an embodiment of the present application provides a water-emulsion double-layer water preparation, comprising the following components, by weight percentage: 60.9% to 96.19% water, 0.1% to 2.5% emulsifier, 3% to 15% emollient, 0.3% to 10% moisturizer, 0.3% to 10% skin conditioner, 0.01% to 0.1% pH adjuster, and 0.1% to 1.5% preservative;

[0041] Among them, emulsifiers include sodium di(lauryl glutamine) lysine and wild soybean seed (Glycine Soja) extract.

[0042] Sodium di(laurylamide glutamine) lysine, marketed as PELLICER™ LB-10 and containing 10% active ingredient, is a product of ASAHI KASEI FINECHEM CO., LTD. Sodium di(laurylamide glutamine) lysine is an anionic double-locking surfactant with multiple hydrophobic and hydrophilic groups, resulting in strong emulsification. Furthermore, due to its molecular structure similar to ceramide, it possesses skincare benefits and can restore the skin's barrier function.

[0043] TXBIO Soybean Seed Extract, marketed as TXBIO Soybean Seed Extract, has an active ingredient content of 20% and is a product of Xing'an Tianxing Biotechnology Co., Ltd. This extract is formulated using a low-temperature process and is derived from enzymatically hydrolyzed lecithin from non-GMO soybeans. Its HLB value of 14.9 demonstrates good hydrophilicity and emulsifying properties, making it mild and non-irritating to the skin.

[0044] In one embodiment, the emollient includes one or more of isohexadecane, squalane, hydrogenated polydecene, neopentyl glycol diheptanoate, ethylhexyl palmitate, C13-16 isoparaffin, glyceryl triethylhexanoate, cetyl ethylhexanoate, isononyl isononanoate, mineral oil, prurinifolia oil, octyldodecanol, jojoba seed oil, grape seed oil, and isopropyl myristate.

[0045] In one embodiment, the moisturizing agent includes one or more of glycerin, butylene glycol, 1,3-propylene glycol, betaine, dipropylene glycol, glycereth-26, erythritol, methylpropanediol, hydroxyethyl urea, sodium polyglutamate, fructan, and trehalose.

[0046] In one embodiment, the skin conditioning agent includes one or more of bisabolol, tocopherol (or vitamin E), β-glucan, niacinamide, biosaccharide gum-1, sodium polyaspartate, glyceryl glucoside, dipotassium glycyrrhizate, glutathione, matrine, corn gluten amino acids, purslane extract, carnosine, acetyl glucosamine, and aloe barbadensis leaf juice.

[0047] In one embodiment, the pH adjuster includes one or more of triethanolamine, potassium hydroxide, arginine, sodium hydroxide, citric acid, and sodium citrate.

[0048] In one embodiment, the preservative includes one or more of methylparaben, propylparaben, chlorphenesin, phenoxyethanol, ethylhexylglycerin, hexamidine diisothionate, and benzyl alcohol.

[0049] In one embodiment, the invention comprises the following components: 0.1% to 0.3% sodium di(laurylamide glutamine) lysine, 0.2% to 0.6% glycine soja seed extract, 2% to 4% isohexadecane, 2% to 4% squalane, 2% to 4% C13-16 isoparaffin, 0.1% to 0.3% tocopherol, 1% to 4% butylene glycol, 2% to 4% glycerol, 0.01% to 0.1% sodium polyglutamate, 1% to 4% purslane extract, 1% to 4% beta-glucan, 1% to 3% glyceryl glucoside, 0.01% to 0.05% arginine, 0.3% to 1.0% phenoxyethanol, 0.1% to 0.5% ethylhexylglycerin, and the balance water.

[0050] In a second aspect, the present invention provides a method for preparing a water-emulsion double-layer aqueous solution, which comprises:

[0051] (1) Add the raw materials of phase A: water, butylene glycol, glycerin, sodium polyglutamate, sodium di(laurylamide glutamine) lysine, and wild soybean seed extract into the emulsifier in sequence, stir, heat up and keep warm;

[0052] (2) Add the raw materials of phase B: isohexadecane, squalane, C13-16 isoparaffin, and tocopherol into the oil phase pot, stir and mix, and heat;

[0053] (3) Vacuuming the mixture of step (2) into the mixture of step (1), homogenizing, stirring, and cooling;

[0054] (4) Add the raw materials of phase C: phenoxyethanol and ethylhexylglycerin into the emulsifier, stir and cool;

[0055] (5) Add the raw materials of phase D: β-glucan, glycerol glucoside, purslane extract and arginine into the emulsifier in sequence, stir evenly, and filter out the material after passing the inspection.

[0056] In one embodiment, the preparation method of the water-emulsion double-layer aqueous solution comprises:

[0057] (1) Add the raw materials of phase A: water, butylene glycol, glycerin, sodium polyglutamate, sodium di(laurylamide glutamine) lysine, and wild soybean seed extract into the emulsifier in sequence, stir and heat to 80℃, and keep warm for 20 minutes.

[0058] (2) Add the raw materials of phase B: isohexadecane, squalane, C13-16 isoparaffin, and tocopherol (vitamin E) into the oil phase pot, stir and mix, and heat to 80°C.

[0059] (3) Vacuum the mixture from step (2) into the mixture from step (1), homogenize for 5-10 minutes, and cool to 60°C with stirring.

[0060] (4) Add the raw materials of phase C: phenoxyethanol and ethylhexylglycerin into the emulsifier, stir and cool to below 45°C.

[0061] (5) Add the raw materials of phase D: β-glucan, glycerol glucoside, purslane extract and arginine into the emulsifier in sequence, stir evenly, and filter out the material after passing the inspection.

[0062] (6) Filling, packaging, and coding.

[0063] (7) After passing the inspection, the goods will be put into storage.

[0064] The embodiments of the present application will be described in detail below in conjunction with Examples 1-3 and Comparative Examples 1-3. However, those skilled in the art will understand that the following examples are only used to illustrate the present application and should not be regarded as limiting the scope of the present application.

[0065] If the specific conditions are not specified in the examples, the experiments were carried out under conventional conditions or those recommended by the manufacturer. All reagents or instruments used, if the manufacturer is not specified, are commercially available conventional products.

[0066] Examples 1-3 and Comparative Examples 1-3 provide a water-emulsion double-layer aqueous solution, and the raw material components are shown in Table 1 in parts by weight:

[0067] Table 1 Preparation formula of examples and comparative examples

[0068]

[0069] The preparation method is as follows:

[0070] (1) Add the raw materials of phase A: water, butylene glycol, glycerin, sodium polyglutamate, PELLICER™ LB-10, and TXBIO SOYBEAN SEED EXTRACT to the emulsifier in sequence, stir and heat to 80°C, and keep warm for 20 minutes;

[0071] (2) Add the raw materials of phase B: isohexadecane, squalane, C13-16 isoparaffin, and tocopherol (vitamin E) into the oil phase pot, stir and mix, and heat to 80°C;

[0072] (3) Vacuum the mixture from step (2) into the mixture from step (1), homogenize for 5-10 minutes, and cool with stirring to 60°C;

[0073] (4) Add the raw materials of phase C: phenoxyethanol and ethylhexylglycerin into the emulsifier, stir and cool to below 45°C;

[0074] (5) Add the raw materials of phase D: β-glucan, glycerol glucoside, purslane extract and arginine into the emulsifier in sequence, stir evenly, and filter out the material after passing the inspection;

[0075] (6) After passing the inspection, filling, packaging and coding;

[0076] (7) After passing the inspection, the goods will be put into storage.

[0077] Test Example 1: Physical and Chemical Index Testing

[0078] The physical and chemical indicators of the prepared water-emulsion double-layer water preparation were tested according to QB / T 2660. The results are shown in Table 2 below:

[0079] Table 2 Physical and chemical index test results

[0080] Sample appearance pH value Heat resistance stability test Cold resistance stability test Example 1 The lower layer is a transparent liquid, and the upper layer is an emulsion 6.15 Pass Pass Example 2 The lower layer is a transparent liquid, and the upper layer is an emulsion 6.26 Pass Pass Example 3 The lower layer is a transparent liquid, and the upper layer is an emulsion 6.19 Pass Pass Comparative Example 1 The lower layer is a transparent liquid, and the upper layer is an emulsion 6.23 Pass Pass Comparative Example 2 The lower layer is a transparent liquid, and the upper layer is an emulsion 6.22 Pass Pass Comparative Example 3 The lower layer is a transparent liquid, and the upper layer is a transparent oily 6.24 Pass Pass

[0081] Test Example 2: Application Performance Testing

[0082] (1) Raw material safety

[0083] All ingredients in this application's water-emulsion double-layer water-based formula have low ingredient safety scores on the Beauty Practice app, all of which are green labels, making them all green products. The ingredient safety scores of this application's formula on the Beauty Practice app are shown in Table 3:

[0084] Table 3 Safety of ingredients in this application formula in the Beauty Practice app

[0085]

[0086] (2) Product safety testing:

[0087] The skin care compositions prepared in the examples and comparative examples were subjected to human patch tests according to the method described in the Technical Specifications for Safety of Cosmetics (2015 Edition).

[0088] Experimental population: A total of 30 people, 30 females and 6 males, aged 21-59, 5 people in each group, who met the volunteer selection criteria.

[0089] Test method: Select an area not exceeding 50mm 2 , a suitable patch tester with a depth of about 1mm, add about 0.020-0.025ml of the test substance into the patch tester using the closed patch test method; apply the patch tester to the curved side of the subject's forearm, remove the test substance after 24 hours, observe the skin reaction 0.5h, 24h, and 48h after removal, and record the results according to the skin reaction grading standard in the "Technical Specifications for Safety of Cosmetics (2015 Edition)".

[0090] Test results: 30 subjects scored 0 points (negative reaction) at three observation time points: 0.5h, 24h, and 48h after removing the patch.

[0091] (3) Product layering speed test:

[0092] The Example and Comparative Example products were placed in 100 ml graduated bottles respectively. After the two phases were completely mixed at the same stirring speed and time, the mixture was allowed to stand and observe the time required for re-stratification. The test observation time was set as follows: for the first 15 minutes, every 10 seconds was an observation cycle; for the first half hour, every 1 minute was an observation cycle; from half an hour to 4 hours, every 10 minutes was a test observation cycle; from 4 hours to 12 hours, every hour was a test observation cycle; from 12 hours to 48 hours, every 4 hours was a test observation cycle; after 48 hours, every 24 hours was a test observation cycle. Test data retention: the last digit is an integer multiple of 5. The test results are shown in Table 4.

[0093] Table 4 Layered speed test results

[0094] Sample separation time (seconds) Complete separation time (seconds) Lower layer becomes transparent time (minutes) Emulsion layer: Liquid layer (volume ratio) Example 1 21011507201:5 Example 2 1909006001:5 Example 3 23013608401:4 Comparative Example 1 504804801:5 Comparative Example 2 403003601:5 Comparative Example 3 106051:6

[0095] As shown in Table 4, the double-layer essence waters of Examples 1 to 3 began to separate in approximately 3 minutes and were completely separated in approximately 20 minutes. The separation interface was clear, with the upper layer being the emulsion and the lower layer being the aqueous solution, which was temporarily translucent. After approximately 12 hours, the lower aqueous solution became transparent. The double-layer essence waters of Comparative Examples 1 and 2 began to separate in approximately 50 seconds and were completely separated in approximately 7 minutes. The separation interface was clear, with the upper layer being the emulsion and the lower layer being the aqueous solution, which was temporarily translucent. After approximately 7 hours, the lower aqueous solution became transparent. Comparative Example 3, which lacked an emulsifier and was a two-phase oil-water system, separated within 10 seconds and was completely separated in 5 minutes.

[0096] The examples incorporate sodium di(laurylamide glutamine) lysine and glycine soja (Soybean) seed extract in varying proportions; Comparative Example 1 incorporates only glycine soja (Soybean) seed extract, Comparative Example 2 incorporates only sodium di(lauryl glutamine) lysine, and Comparative Example 3 serves as a blank control. As shown in Table 4, the test results indicate that the double-layer aqueous solutions prepared in Comparative Examples 1-3 exhibit rapid delamination, potentially separating layers when shaken and poured, resulting in only the upper layer being poured out, resulting in a poor user experience. In contrast, the double-layer aqueous solutions prepared in Examples 1-3 exhibit moderate delamination rates, exhibit good material uniformity, and provide a pleasant user experience when shaken and poured. This demonstrates the significant synergistic effect of sodium di(laurylamide glutamine) lysine combined with glycine soja (Soybean) seed extract, resulting in enhanced emulsification ability, moderate delamination rates, and excellent stability. Significantly better than using sodium di(lauryl glutamine) lysine or soybean (Glycine Soja) seed extract alone.

[0097] It should be understood that the numerical values ​​disclosed in the examples of the present application are approximate values ​​rather than definite values. Where errors or experimental conditions permit, all values ​​within the error range may be included without being limited to the specific numerical values ​​disclosed in the examples of the present application.

[0098] The numerical ranges disclosed in the examples of this application are used to represent the relative amounts of components in the mixture and the ranges of temperature or other parameters listed in other method examples.

[0099] In the description of this specification, the reference terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0100] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0101] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A double-layer water-emulsion preparation, characterized in that: The composition comprises the following components by weight percentage: 60.9% to 96.19% of water, 0.1% to 2.5% of emulsifier, 3% to 15% of emollient, 0.3% to 10% of moisturizer, 0.3% to 10% of skin conditioner, 0.01% to 0.1% of pH adjuster and 0.1% to 1.5% of preservative; The emulsifier comprises sodium di(laurylamide glutamine) lysine and wild soybean seed extract.

2. The water-emulsion double-layer aqueous preparation according to claim 1, characterized in that: The emollient includes one or more of isohexadecane, squalane, hydrogenated polydecene, neopentyl glycol diheptanoate, ethylhexyl palmitate, C13-16 isoparaffin, glyceryl tri(ethylhexanoate), cetyl ethylhexanoate, isononyl isononanoate, mineral oil, prickle oil, octyldodecanol, jojoba seed oil, grape seed oil, and isopropyl myristate.

3. The water-emulsion double-layer aqueous preparation according to claim 2, characterized in that: The moisturizing agent includes one or more of glycerin, butylene glycol, 1,3-propylene glycol, betaine, dipropylene glycol, glyceryl polyether-26, erythritol, methylpropanediol, hydroxyethyl urea, sodium polyglutamate, fructan, and trehalose.

4. The water-emulsion double-layer water preparation according to claim 3, characterized in that: The skin conditioning agent includes one or more of bisabolol, tocopherol, β-glucan, niacinamide, biosaccharide gum-1, sodium polyaspartate, glyceryl glucoside, dipotassium glycyrrhizinate, glutathione, matrine, corn gluten amino acids, purslane extract, carnosine, acetyl glucosamine, and aloe vera leaf juice.

5. The water-emulsion double-layer aqueous preparation according to claim 4, characterized in that: The pH regulator includes one or more of triethanolamine, potassium hydroxide, arginine, sodium hydroxide, citric acid, and sodium citrate.

6. The water-emulsion double-layer water preparation according to claim 5, characterized in that: The preservatives include one or more of methylparaben, propylparaben, chlorphenesin, phenoxyethanol, ethylhexylglycerin, hexamidine di(hydroxyethylsulfonate), and benzyl alcohol.

7. The water-emulsion double-layer water preparation according to claim 6, characterized in that: The invention comprises the following components: sodium di(laurylamide glutamine) lysine 0.1% to 0.3%, wild soybean seed extract 0.2% to 0.6%, isohexadecane 2% to 4%, squalane 2% to 4%, C13-16 isoparaffin 2% to 4%, tocopherol 0.1% to 0.3%, butylene glycol 1% to 4%, glycerol 2% to 4%, sodium polyglutamate 0.01% to 0.1%, purslane extract 1% to 4%, β-glucan 1% to 4%, glyceryl glucoside 1% to 3%, arginine 0.01% to 0.05%, phenoxyethanol 0.3% to 1.0%, ethylhexylglycerin 0.1% to 0.5%, and the balance water.

8. A method for preparing a water-emulsion double-layer aqueous solution, for preparing the water-emulsion double-layer aqueous solution according to claim 7, characterized in that: include: (1) Add the raw materials of phase A: water, butylene glycol, glycerin, sodium polyglutamate, sodium di(laurylamide glutamine) lysine, and wild soybean seed extract into an emulsifier in sequence, stir, heat up, and keep warm; (2) Add the raw materials of phase B: isohexadecane, squalane, C13-16 isoparaffin, and tocopherol into the oil phase pot, stir to mix, and heat up; (3) vacuuming the mixture of step (2) into the mixture of step (1), homogenizing, stirring, and cooling; (4) Add the raw materials of phase C: phenoxyethanol and ethylhexylglycerin into the emulsifier, stir and cool down; (5) Add the raw materials of phase D: β-glucan, glycerol glucoside, purslane extract and arginine into the emulsifier in sequence, stir evenly, and filter out the material after passing the inspection.

9. The method for preparing the water-emulsion double-layer aqueous preparation according to claim 8, characterized in that: include: (1) Add the raw materials of phase A: water, butylene glycol, glycerin, sodium polyglutamate, sodium di(laurylamide glutamine) lysine, and wild soybean seed extract into an emulsifier in sequence, stir and heat to 80°C, and keep warm for 20 minutes; (2) Add the raw materials of phase B: isohexadecane, squalane, C13-16 isoparaffin, and tocopherol (vitamin E) into the oil phase pot, stir and mix, and heat to 80°C; (3) Vacuuming the mixture of step (2) into the mixture of step (1), homogenizing for 5 to 10 minutes, stirring and cooling to 60° C. (4) Add the raw materials of phase C: phenoxyethanol and ethylhexylglycerin into the emulsifier, stir and cool to below 45°C; (5) Add the raw materials of phase D: β-glucan, glycerol glucoside, purslane extract and arginine into the emulsifier in sequence, stir evenly, and filter out the material after passing the inspection.

10. The method for preparing the water-emulsion double-layer aqueous preparation according to claim 8 or 9, characterized in that: Also includes: (6) Filling, packaging, and coding; (7) After passing the inspection, the goods can be put into storage.

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