A skin care composition, a pearl-shaped essence and a preparation method thereof

Abstract

This application relates to the technical field of cosmetics, and specifically discloses a skin care composition, a pearl-shaped essence and a preparation method thereof. The skin care composition of this application comprises the following components by mass percentage: aqueous phase: 2-5% of plant extract I, 1-11% of humectant, 1-3% of niacinamide and 0.5-1% of thickener; the plant extract I is kangaroo paw extract, gleditsia horrida seed extract, roselle extract and hydrolyzed ginsenoside; oil phase: 0.5-2% of plant extract II, 0.5-1.5% of emollient and 0.1-0.3% of antioxidant; the plant extract II is jojoba seed oil and dunaliella salina extract; water. The skin care composition provided by this application can be used to prepare a pearl-shaped essence with independent oil beads, which can achieve efficient penetration and deep moisturization of the skin while maintaining excellent dispersibility and stability, and achieve a good repair effect.

Description

Technical Field

[0001] The present application relates to the technical field of cosmetics, and in particular to a skin care composition, a bead-type essence and a preparation method thereof. Background Art

[0002] As consumers' requirements for the efficacy and user experience of skin care products continue to increase, the field of skin care products has developed rapidly. Among them, essence, as a high-efficiency skin care product, has made significant progress in its formula design and preparation technology in recent years. The types of essence products currently on the market mainly include emulsion type, water-based type, etc. These products play an important role in moisturizing, anti-oxidation, anti-aging and other aspects, and greatly meet the needs of user groups with different skin types and needs.

[0003] In recent years, in order to improve the efficacy of skin care products, the preparation of essences mainly adopts emulsification technology to mix the water phase and the oil phase, and adds emulsifiers at the same time to ensure the stability and uniformity of the two phases; however, the above method has some limitations; for example: on the one hand, due to the natural incompatibility of the water phase and the oil phase, even after the essence is emulsified, some of the active ingredients in it may still be stratified or aggregated during storage, especially in water-based products, oil-soluble components are difficult to disperse evenly in water, resulting in reduced protection and utilization of the active ingredients; on the other hand, the above system mainly relies on emulsifiers to maintain stability, and the presence of some emulsifiers may cause discomfort to some users with sensitive skin.

[0004] Therefore, how to achieve more effective protection and uniform dispersion of effective ingredients has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In order to overcome the problems of poor dispersibility and stability and limited effect of effective ingredients in existing essences, the present application provides a skin care composition, a bead-type essence and a preparation method thereof.

[0006] In a first aspect, the present application provides a skin care composition, which adopts the following technical solution:

[0007] A skin care composition, comprising the following components by mass percentage:

[0008] Aqueous phase: 2-5% of plant extract I, 1-11% of moisturizer, 1-3% of niacinamide and 0.5-1% of thickener; wherein the plant extract I is kangaroo paw extract, Gleditsia sinensis seed extract, Hibiscus sabdariffa extract and hydrolyzed ginsenosides in a weight ratio of (0.1-0.3):(0.2-0.4):(0.1-0.3):1;

[0009] Oil phase: 0.5 - 2% of plant extract II, 0.5 - 1.5% of emollient, and 0.1 - 0.3% of antioxidant; wherein, the plant extract II is jojoba seed oil and Dunaliella salina extract with a weight ratio of 1:(0.5 - 0.8);

[0010] Water.

[0011] The present application provides a skin care composition, which can ensure the stability and effectiveness of active ingredients, enable the active ingredients to be evenly distributed and effectively absorbed by the skin, so as to achieve good repair and nourishment effects. Specifically: The aqueous phase of the skin care composition uses plant extract I which is compounded by kangaroo paw extract, Gleditsia triacanthos seed extract, roselle extract and hydrolyzed ginsenosides in a specific ratio, which can effectively improve the skin's moisture retention and antioxidant capacity, and at the same time improve skin elasticity; the oil phase uses plant extract II which is compounded by jojoba seed oil and Dunaliella salina extract in a specific ratio. These ingredients are rich in natural oils and antioxidant substances. On the one hand, they can form a protective film on the skin surface, and on the other hand, they can strengthen the skin's antioxidant capacity; on the other hand, they can effectively lock in moisture, making the skin soft, moisturized and elastic. Importantly, through the specific selection and mixing of plant extract I in the aqueous phase and plant extract II in the oil phase in the present application, the oil phase forms stable and dispersed granular oil droplets in the aqueous phase system. Compared with emulsions and aqueous solvent types, the dosage form of such independent oil droplets can enable the active ingredients to play a better role, and the dosage form is more stable, and the skin care effect of the obtained skin care composition is better. In addition, by dispersing plant extract I and plant extract II in the aqueous phase and the oil phase respectively in the present application, the oil-soluble components and the water-soluble components are each in the optimal protection environment, avoiding the problems of easy aggregation and uneven distribution of active substances in traditional aqueous dosage forms. In summary, in the skin care composition provided by the present application, by controlling the component ratios of plant extract I in the aqueous phase and plant extract II in the oil phase within the above ranges, and mixing the aqueous phase and the oil phase in a reasonable ratio, the oil phase can be evenly dispersed in the aqueous phase in the form of tiny oil droplets, so as to prepare a pearl-shaped essence in the form of oil droplets, which not only has good dispersion stability, but also can ensure that the active ingredients are effectively maintained, and thus are fully and effectively absorbed by the skin, achieving good repair and nourishment effects, and providing users with a mild and highly effective skin care experience.

[0012] In this application, after the kangaroo paw extract, Gleditsia horrida Willd. seed extract, roselle extract and hydrolyzed ginsenosides in Plant Extract I are compounded in a specific weight ratio, there is a hydrogen bond interaction between their active ingredients. This intermolecular force can effectively enhance the stability of the aqueous phase system, thereby ensuring the uniform dispersion and stability of the oil phase oil droplets. In addition, the above plant extracts are rich in polyphenolic compounds and polysaccharide substances. Among them, the polysaccharide substances have good film-forming properties and steric hindrance effects, and can form a protective layer on the surface of the oil phase particles, thereby preventing the oil phase particles from aggregating or separating in the aqueous phase and forming a large number of stable oil droplets. The jojoba seed oil in Plant Extract II has good moisturizing and penetration-enhancing effects; while the Dunaliella salina extract is rich in carotenoids and polyunsaturated fatty acids, and can form a stable micelle structure in the oil phase to ensure the stability and uniform dispersion of the oil phase. In this application, by using the kangaroo paw extract, Gleditsia horrida Willd. seed extract, roselle extract and hydrolyzed ginsenosides as the active ingredients in the aqueous phase; and the jojoba seed oil and Dunaliella salina extract as the active ingredients in the oil phase, on the one hand, during use, the active ingredients in the oil phase can enhance the efficacy of the active ingredients in the aqueous phase, creating a healthy microenvironment for the skin, thereby meeting the various needs of the skin for deep moisturization, hydration, antioxidant, etc.; on the other hand, through the intermolecular force and steric hindrance effect between the active ingredients, the oil phase can be evenly dispersed in the aqueous phase in the form of tiny oil droplets, forming a pearl-shaped essence with visible oil droplets and maintaining long-term stability. This not only avoids the use of some emulsifiers that are harmful to the skin and reduces the irritation to sensitive skin, but also significantly improves the stability and utilization rate of the active ingredients, thereby achieving a more efficient skin care effect.

[0013] In this application, the kangaroo paw extract has the functions of deep moisturization, antioxidant and skin repair. On the one hand, the Gleditsia horrida Willd. seed extract can remove the aged cutin on the skin surface, tighten the skin and make the skin smoother and more delicate; on the other hand, it can also balance the oil and moisture of the skin, improve the overall condition of the skin and make the skin healthier and more elastic. The roselle extract is rich in antioxidant components, which helps to resist free radical damage. The hydrolyzed ginsenosides can not only whiten and moisturize, antioxidant, but also maintain skin elasticity and firmness, and improve uneven skin tone. The jojoba seed oil is similar to the natural skin oil, and can easily penetrate into the epidermal layer of the skin and be quickly absorbed by the skin, providing good moisturizing effect and making the skin soft, moist and more elastic. The Dunaliella salina extract can strengthen the antioxidant ability of the skin and enhance the defense against environmental stress. In addition, in this application, by reasonably matching the aqueous phase and the oil phase, the essence can achieve efficient penetration and deep moisturization while maintaining excellent stability and dispersibility, thereby achieving a better skin care effect.

[0014] In some embodiments, the weight ratio of the kangaroo paw extract, the Gleditsia horrida seed extract, the roselle extract, and the hydrolyzed ginsenosides may be (0.1 - 0.2):0.3:0.2:1, (0.2 - 0.3):0.3:0.2:1, 0.2:(0.2 - 0.3):0.2:1, 0.2:(0.3 - 0.4):0.2:1, 0.2:0.3:(0.1 - 0.2):1, or 0.2:0.3:(0.2 - 0.3):1.

[0015] In a specific embodiment, the weight ratio of the kangaroo paw extract, the Gleditsia horrida seed extract, the roselle extract, and the hydrolyzed ginsenosides may also be 0.1:0.3:0.2:1, 0.2:0.3:0.2:1, 0.3:0.3:0.2:1, 0.2:0.2:0.2:1, 0.2:0.4:0.2:1, 0.2:0.3:0.1:1, or 0.2:0.3:0.3:1.

[0016] In some embodiments, the weight ratio of the jojoba seed oil and the Dunaliella salina extract may be 1:(0.5 - 0.6), 1:(0.5 - 0.7), 1:(0.6 - 0.7), 1:(0.6 - 0.8), or 1:(0.7 - 0.8).

[0017] In a specific embodiment, the weight ratio of the jojoba seed oil and the Dunaliella salina extract may also be 1:0.5, 1:0.6, 1:0.7, or 1:0.8.

[0018] Optionally, the plant extract I is a kangaroo paw extract, a Gleditsia horrida seed extract, a roselle extract, and hydrolyzed ginsenosides with a weight ratio of 0.2:0.3:0.2:1;

[0019] The plant extract II is a jojoba seed oil and a Dunaliella salina extract with a weight ratio of 1:0.7.

[0020] Optionally, the humectant is selected from one or more of butylene glycol, xylitol glucoside, dehydrated xylitol, xylitol, glycerol, erythritol, 1,2 - hexanediol, 1,2 - pentanediol, and 1,3 - propanediol;

[0021] The thickener is polyacrylate crosspolymer - 6;

[0022] The emollient is selected from one or more of diphenylpolydimethylsiloxane, pentaerythrityl tetra(ethylhexanoate), and seabuckthorn fruit oil;

[0023] The antioxidant is tocopheryl acetate and / or tocopherol.

[0024] Optionally, the aqueous phase further comprises 0.5-1% of solubilizer, 0.2-1 part of preservative and 0.2-0.5% of pH regulator.

[0025] Optionally, the oil phase further comprises 0.1-0.2% of triglyceride caprylate / caprate, 0.1-0.2% of isosorbide dimethyl ether and 0.1-0.3% of fragrance.

[0026] Optionally, the fragrance is essence.

[0027] Optionally, the solubilizer is PEG-60 hydrogenated castor oil; the preservative is phenoxyethanol and / or ethylhexylglycerin; the pH regulator is citric acid.

[0028] In a second aspect, the present application provides a pearl-shaped essence prepared from the skin care composition described above.

[0029] In a third aspect, the present application provides a preparation method of a pearl-shaped essence, comprising the following steps:

[0030] Preparation of the aqueous phase: First, heat part of the water to 70-80 °C, then add the thickener thereto, stir until uniformly dispersed and defoamed; then cool down to 40-65 °C, and add niacinamide, moisturizer and other components, stir until uniformly dispersed and defoamed to obtain the aqueous phase;

[0031] Preparation of the oil phase: Mix each component of the oil phase, stir until uniformly dispersed to obtain the oil phase;

[0032] Mixing: Slowly add the oil phase to the aqueous phase, supplement the remaining water, and stir the oil phase uniformly into the aqueous phase by up-and-down movement stirring to obtain the pearl-shaped essence.

[0033] The present application provides a preparation method of a pearl-shaped essence. The above preparation method wraps the oil-soluble components in the form of oil beads and uniformly disperses them in the aqueous phase, thereby being able to well avoid the common uneven aggregation phenomenon in aqueous agents, and thus better protecting the oil-soluble components. Specifically: During the preparation process of the aqueous phase, through the uniform dispersion and defoaming treatment of the thickener, the stability of the aqueous phase system is ensured, providing a good basis for subsequent mixing. During the preparation process of the oil phase, the uniform dispersion of each component ensures the homogeneity and stability of the oil phase, further enhancing the effect of the oil wrapping the extracted substances. In the mixing step, by slowly adding the oil phase and combining the specific operation of "up-and-down movement stirring" with the design of the extract selection of the present application, the use of skin-unfriendly emulsifiers is omitted, and the uniform distribution of the oil phase in the aqueous phase is achieved, forming a stable oil bead structure, effectively avoiding the problems of oil-water separation or oil bead aggregation.

[0034] Optionally, in the mixing step, the stirring speed is 10 - 30 rpm, and the speed of moving up and down is 3 - 5 cm / s.

[0035] In some embodiments, the stirring speed can be 10 - 20 rpm, 10 - 30 rpm, 10 - 40 rpm, 20 - 30 rpm, 20 - 40 rpm, or 30 - 40 rpm.

[0036] In a specific embodiment, the stirring speed can also be 10 rpm, 20 rpm, 30 rpm, or 40 rpm.

[0037] In some embodiments, the speed of moving up and down can be 3 - 4 cm / s, 3 - 5 cm / s, 3 - 6 cm / s, 4 - 5 cm / s, 4 - 6 cm / s, or 5 - 6 cm / s.

[0038] In a specific embodiment, the speed of moving up and down can also be 3 cm / s, 4 cm / s, 5 cm / s, or 6 cm / s.

[0039] In summary, the present application has the following beneficial effects:

[0040] 1. The present application provides a skin care composition. The above skin care composition uses kangaroo paw extract, Gleditsia horrida seed extract, roselle extract, and hydrolyzed ginsenosides with a weight ratio of (0.1 - 0.3) : (0.2 - 0.4) : (0.1 - 0.3) : 1 as plant extract I in the aqueous phase, and uses jojoba seed oil and Dunaliella salina extract with a weight ratio of 1 : (0.5 - 0.7) as plant extract II in the oil phase, and mixes the aqueous phase and the oil phase through up - and - down movement stirring, so that the oil phase can be uniformly dispersed in the aqueous phase in the form of independent oil beads, forming a pearl - type essence with visible oil beads. The above pearl - type essence not only has good dispersion stability, but also has excellent use effects, is beneficial to the exertion of active ingredients, can improve skin dryness, roughness, wrinkles, etc., and makes the skin smooth, tender, moist, and elastic.

[0041] 2. The present application further controls the stirring speed in the mixing step to 10 - 30 rpm and the speed of moving up and down to 3 - 5 cm / s, which can further improve the dispersion stability of the pearl - type essence, avoid the problems of oil - water separation or oil bead aggregation, and thus extend the service life of the pearl - type essence. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic diagram of the sample of the pearl - type essence prepared in Example 2 of the present application;

[0043] Figure 2It is a schematic diagram of the sample of the essence prepared in Comparative Example 9 of this application. Detailed implementation mode

[0044] This application provides a skin care composition, which includes the following components by mass percentage:

[0045] Aqueous phase: 2-5% of plant extract I, 1-11% of humectant, 1-3% of niacinamide, 0.5-1% of thickener, 0.5-1% of solubilizer, 0.2-1 part of preservative and 0.2-0.5% of pH regulator; wherein, the plant extract I is an extract of kangaroo paw, extract of Gleditsia horrida seeds, extract of Hibiscus sabdariffa and hydrolyzed ginsenoside saponins with a weight ratio of (0.1-0.3):(0.2-0.4):(0.1-0.3):1;

[0046] Oil phase: 0.5-2% of plant extract II, 0.5-1.5% of emollient, 0.1-0.3% of antioxidant, 0.1-0.2% of caprylic / capric triglyceride, 0.1-0.2% of isosorbide dimethyl ether and 0.1-0.3% of fragrance; wherein, the plant extract II is jojoba seed oil and Dunaliella salina extract with a weight ratio of 1:(0.5-0.7);

[0047] Water.

[0048] Among them, the humectant is selected from one or more of butylene glycol, xylitol glucoside, dehydrated xylitol, xylitol, glycerin, erythritol, 1,2-hexanediol, 1,2-pentanediol and 1,3-propanediol; the thickener is polyacrylate cross-linked polymer-6; the emollient is selected from one or more of diphenyl polydimethylsiloxane, pentaerythritol tetra(ethylhexanoate) and seabuckthorn fruit oil; the antioxidant is tocopheryl acetate and / or tocopherol; the solubilizer is PEG-60 hydrogenated castor oil; the preservative is phenoxyethanol and / or ethylhexylglycerin; the pH regulator is citric acid.

[0049] This application provides a pearl-shaped essence, and the preparation method of the pearl-shaped essence includes the following steps:

[0050] (1) Preparation of the aqueous phase: First, heat part of the water to 70-80 °C, then add the thickener thereto, stir until evenly dispersed and defoamed; then cool down to 40-65 °C, and add niacinamide, humectant and other components, stir until evenly dispersed and defoamed to obtain the aqueous phase;

[0051] (2) Preparation of the oil phase: Mix each component of the oil phase, stir until evenly dispersed to obtain the oil phase;

[0052] (3) Mixing: Slowly add the oil phase to the aqueous phase, supplement the remaining water, and uniformly stir the oil phase into the aqueous phase by stirring and moving up and down to obtain a pearl-shaped essence; the stirring speed is 10 - 30 rpm, and the moving speed up and down is 3 - 5 cm / s.

[0053] In the examples of this application, the trade names of kangaroo paw extract, acacia farnesiana seed extract, roselle extract, dunaliella salina extract, and jojoba seed oil are SKINectura, INST'TIGHT, HYDROSELLA, DUNALIELLA, and SIMMONDSIA respectively, all purchased from Lucas Meyer Cosmetics; the product name of hydrolyzed ginsenosides is surfactant, purchased from Shanghai Yuyu New Material Technology Co., Ltd.; the rest of the raw materials, reagents, solvents, etc. used in this application can be obtained through commercial purchases.

[0054] The following further details this application in combination with examples and performance detection tests.

[0055] Examples 1 - 7

[0056] Examples 1 - 7 respectively provide a pearl-shaped essence.

[0057] The differences in the above examples lie in: the weight ratios of the components in Plant Extract I, as shown in Table 1 below.

[0058] The preparation methods of the pearl-shaped essences provided in Examples 1 - 7 include the following steps:

[0059] (1) Preparation of the aqueous phase: First, heat 80 g of water to 75°C, then add 0.8 g of polyacrylate cross-linked polymer - 6 thereto, stir until uniformly dispersed and defoamed; then cool down to 60°C, add 2 g of butylene glycol; then cool down to 40°C, and add 3 g of Plant Extract I, 2 g of niacinamide, 0.5 g of xylitol glucoside, 0.5 g of anhydroxylitol, 0.5 g of xylitol, 0.8 g of PEG - 60 hydrogenated castor oil, 0.5 g of phenoxyethanol, and 0.4 g of citric acid, stir until uniformly dispersed and defoamed to obtain the aqueous phase;

[0060] (2) Preparation of the oil phase: Mix 1.5 g of Plant Extract II (jojoba seed oil and dunaliella salina extract with a weight ratio of 1:0.7), 1 g of emollient (diphenyl dimethicone, pentaerythrityl tetra(ethylhexanoate), and seabuckthorn fruit oil with a weight ratio of 1:0.6:0.3), 0.2 g of tocopheryl acetate, 0.2 g of caprylic / capric triglyceride, 0.2 g of isosorbide dimethyl ether, and 0.2 g of fragrance, stir until uniformly dispersed to obtain the oil phase;

[0061] (3) Mixing: Slowly add the oil phase to the aqueous phase, make up the water to 100 g of the essence, then stir and move up and down reciprocally. The stirring speed is 20 rpm, the up-and-down moving speed is 4 cm / s, and the time is 5 min to uniformly disperse the oil phase into the aqueous phase to obtain a pearl-shaped essence.

[0062] Table 1 Weight ratios of components in Plant Extract I used in the aqueous phase of Examples 1 - 7

[0063]

[0064] Examples 8 - 10

[0065] Examples 8 - 10 respectively provide a pearl-shaped essence.

[0066] The difference between the above examples and Example 2 lies in: the weight ratios of components in Plant Extract II, as specifically shown in Table 2 below.

[0067] Table 2 Weight ratios of components in Plant Extract I used in the aqueous phase of Examples 2, 8 - 10

[0068]

[0069] Examples 11 - 16

[0070] Examples 11 - 16 respectively provide a pearl-shaped essence.

[0071] The difference between the above examples and Example 2 lies in: in the mixing step, the stirring speed and the up-and-down moving speed, as specifically shown in Table 3 below.

[0072] Table 3 Stirring speed and up-and-down moving speed in the mixing step of Examples 11 - 16

[0073] Comparative Example 1

[0074] Comparative Example 1 provides an essence.

[0075] The difference between the above comparative example and Example 2 lies in: Plant Extract I uses kangaroo paw extract, Gleditsia horrida seed extract, roselle extract and hydrolyzed ginsenoside in a weight ratio of 1:1:1:1. Comparative Example 2

[0076] Comparative Example 2 provides an essence.

[0077] The difference between the above comparative example and Example 2 lies in: Plant Extract I uses Gleditsia horrida seed extract, roselle extract and hydrolyzed ginsenoside in a weight ratio of 0.5:0.2:1. Comparative Example 3

[0078] Comparative Example 3 provides a serum.

[0079] The difference between the above comparative example and Example 2 is that the plant extract I is an extract of kangaroo paw, an extract of roselle, and hydrolyzed ginsenosides in a weight ratio of 0.2:0.5:1. Comparative Example 4

[0080] Comparative Example 4 provides a serum.

[0081] The difference between the above comparative example and Example 2 is that the plant extract I is an extract of kangaroo paw, an extract of Gleditsia horrida seeds, and hydrolyzed ginsenosides in a weight ratio of 0.4:0.3:1 Comparative Example 5

[0082] Comparative Example 5 provides a serum.

[0083] The difference between the above comparative example and Example 2 is that the plant extract I is an extract of kangaroo paw, an extract of Gleditsia horrida seeds, and an extract of roselle in a weight ratio of 1.2:0.3:0.2. Comparative Example 6

[0084] Comparative Example 6 provides a serum.

[0085] The difference between the above comparative example and Example 2 is that the plant extract II is jojoba seed oil and Dunaliella salina extract in a weight ratio of 1:1.5. Comparative Example 7

[0086] Comparative Example 7 provides a serum.

[0087] The difference between the above comparative example and Example 2 is that the plant extract II only uses jojoba seed oil. Comparative Example 8

[0088] Comparative Example 8 provides a serum.

[0089] The difference between the above comparative example and Example 2 is that the plant extract II only uses Dunaliella salina extract. Comparative Example 9

[0090] Comparative Example 9 provides a serum.

[0091] The difference between the above comparative example and Example 2 is that: (3) The mixing step is: slowly adding the oil phase to the water phase, adding water to make the serum 100 g, then stirring, the stirring speed is 50 rpm, and the time is 10 min to obtain a pearl-shaped serum.

[0092] Performance Detection Test

[0093] (1) Efficacy determination

[0094] The essence obtained from Examples 1-16 and Comparative Examples 1-9 was subjected to efficacy determination, and the detection method was as follows:

[0095] Test method: 50 female subjects aged 30-40 years old, 50 female subjects aged 40-50 years old, and 50 female subjects aged 50-60 years old were selected. The subjects were randomly divided into 25 groups (16 experimental groups and 9 control groups; each group included 2 subjects of different age groups); the experimental groups 1-16 used the pearl-shaped essence provided in Examples 1-16; the control groups 1-9 used the essence provided in Comparative Examples 1-9. The subjects used the essence every morning and evening after cleansing their faces, and gently massaged until the essence was completely absorbed, for a total of 28 days. During the entire test period, long-term sun exposure, outdoor sports, traveling, etc. were not allowed, and cosmetics or drugs with similar product effects were not allowed to be used. The subjects were not allowed to change their daily care habits during the test period.

[0096] Before and 28 days after using the essence, the subjects used a Corneometer CM 825 skin moisture detector to measure the moisture content of the cheek cutin layer, a Glossymeter GL200 to measure skin gloss, a Corneometer MPA580 skin elasticity detector to detect the skin elasticity at the highest part of both cheekbones, and a PRIMOS skin rapid three-dimensional imaging system to detect skin wrinkles; the improvement rate of each index before and after the test was calculated, and the average value of each index of each group was obtained. The improvement rate calculation formula for each index is as follows, and the results are shown in Table 4 below;

[0097] Improvement rate of each index = (data of a certain index 28 days after use - data of a certain index before use) / data of a certain index before use × 100%;

[0098] Among them, the pearl-shaped essence prepared in Example 1 is as Figure 1 shown; the essence prepared in Comparative Example 9 is as Figure 2 shown. Figure 1 It can be seen that in the pearl-shaped essence prepared in Example 1, the oil phase can be uniformly dispersed in the water phase in the form of independent oil beads, forming visible oil beads to the naked eye; Figure 2 It can be seen that the formation of oil bead particles in the essence prepared in Comparative Example 9 is not obvious.

[0099] Table 4 Efficacy test results of the pearl-shaped essence obtained from Examples 1-16 and Comparative Examples 1-9

[0100]

[0101] According to the detection results in Table 4, it can be seen that the pearl-shaped essence obtained in Examples 1-16 of the present application can increase the water content of the stratum corneum of the subjects' cheeks by 15.2-18.5%, the glossiness by 23.4-26.3%, the skin elasticity by 1.1-1.5%, and reduce the wrinkles by 13.2-15.1% after 28 days of use. While the essence obtained in Comparative Examples 1-9 can only increase the water content of the stratum corneum of the subjects' cheeks by 9.2-15.4%, the glossiness by 14.8-23.4%, the skin elasticity by 0.5-1.2%, and reduce the wrinkles by 9.6-12.5% after 28 days of use. Therefore, it shows that the present application uses kangaroo paw extract, Gleditsia horrida seed extract, roselle extract and hydrolyzed ginsenosides with a weight ratio of (0.1-0.3):(0.2-0.4):(0.1-0.3):1 as Plant Extract I in the aqueous phase, and jojoba seed oil and Dunaliella salina extract with a weight ratio of 1:(0.5-0.8) as Plant Extract II in the oil phase, and mixes the aqueous phase and the oil phase by stirring and moving up and down, and the prepared pearl-shaped essence has excellent use effects, can improve skin dryness, roughness and wrinkles, etc., and makes the skin smooth, tender, moist and elastic.

[0102] (II) Stability test

[0103] The pearl-shaped essences of Examples 1-16 and Comparative Examples 1-8 were respectively placed in an environment of 25±5°C and 45±5°C for 14d, 30d, 60d, and 90d, and it was observed or detected whether phenomena such as stratification and aggregation occurred in the pearl-shaped essence after each time. The results are shown in Table 5 below.

[0104] Among them, for the essence prepared in Comparative Example 9, the formation of oil beads was not obvious, and a partial emulsion essence was obtained, so the stability test was not carried out.

[0105] Table 5 Stability test results of the pearl-shaped essences obtained in Examples 1-16 and Comparative Examples 1-8

[0106]

[0107] Continued Table 5

[0108]

[0109] As can be seen from the detection results in Table 5, after the pearl-shaped essence obtained in Examples 1-14 of the present application was placed at 25±5°C and 45±5°C for 14 days, 30 days, 60 days, and 90 days, there was no obvious change in its appearance; while for the pearl-shaped essence obtained in Comparative Examples 1-8, there were situations such as a small amount of oil phase aggregation, a decrease in oil droplet particles, slight stratification, and obvious stratification after being placed at high temperature / for a long time. It shows that the present application uses an extract of kangaroo paw, an extract of Gleditsia horrida seeds, an extract of Hibiscus sabdariffa, and hydrolyzed ginsenosides in a weight ratio of (0.1-0.3):(0.2-0.4):(0.1-0.3):1 as Plant Extract I in the aqueous phase, and uses jojoba seed oil and Dunaliella salina extract in a weight ratio of 1:(0.5-0.8) as Plant Extract II in the oil phase, and mixes the aqueous phase and the oil phase by up-and-down moving stirring, so that the oil phase can be uniformly dispersed in the aqueous phase in the form of tiny oil droplets for a long time.

[0110] The detection results of Example 2 and Examples 15-16 found that after the pearl-shaped essence of Example 2 was placed at 25±5°C and 45±5°C for 14 days, 30 days, 60 days, and 90 days, its appearance remained completely unchanged, while there was a small amount of oil phase aggregation after the pearl-shaped essence of Examples 15-16 was placed at 45±5°C for 90 days. It shows that the present application further controls the stirring speed in the mixing step to 10-30 rpm and the up-and-down moving speed to 3-5 cm / s, which can further improve the dispersion stability of the oil droplets in the pearl-shaped essence, avoid the problem of oil droplet aggregation, and thus extend the service life of the pearl-shaped essence.

[0111] Although the present invention has been described in detail above with general descriptions and specific embodiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A skin care composition, characterized in that, Comprising the following components by mass percentage: Aqueous phase: 2 - 5% of plant extract I, 1 - 11% of humectant, 1 - 3% of niacinamide, and 0.5 - 1% of thickener; wherein, the plant extract I is an extract of kangaroo paw, extract of Gleditsia triacanthos seeds, extract of roselle, and hydrolyzed ginsenosides in a weight ratio of (0.1 - 0.3):(0.2 - 0.4):(0.1 - 0.3):1; Oil phase: 0.5 - 2% of plant extract II, 0.5 - 1.5% of emollient, and 0.1 - 0.3% of antioxidant; wherein, the plant extract II is jojoba seed oil and extract of Dunaliella salina in a weight ratio of 1:(0.5 - 0.8); Water; The preparation method of the skin care composition includes mixing, and the specific steps of the mixing are: slowly adding the oil phase to the aqueous phase, and uniformly stirring the oil phase into the aqueous phase by means of up - and - down moving stirring to obtain the skin care composition.

2. The skin care composition according to claim 1, characterized in that, The plant extract I is an extract of kangaroo paw, extract of Gleditsia triacanthos seeds, extract of roselle, and hydrolyzed ginsenosides in a weight ratio of 0.2:0.3:0.2:1; The plant extract II is in a weight ratio of 1: 0.7 of jojoba seed oil and extract of Dunaliella salina.

3. The skin care composition according to claim 1, characterized in that, The humectant is selected from one or more of butylene glycol, xylitol glucoside, dehydrated xylitol, xylitol, glycerol, erythritol, 1,2 - hexanediol, 1,2 - pentanediol, and 1,3 - propanediol; The thickener is polyacrylate cross - polymer - 6; The emollient is selected from one or more of diphenyl dimethyl polysiloxane, pentaerythritol tetra(ethylhexanoate), and seabuckthorn fruit oil; The antioxidant is tocopheryl acetate and / or tocopherol.

4. The skin care composition according to claim 1, characterized in that, The aqueous phase further includes 0.5 - 1% of solubilizer, 0.2 - 1% of preservative, and 0.2 - 0.5% of pH regulator.

5. The skin care composition according to claim 1, characterized in that, The oil phase further includes 0.1 - 0.2% of caprylic / capric triglyceride, 0.1 - 0.2% of isosorbide dimethyl ether, and 0.1 - 0.3% of fragrance.

6. The skin care composition according to claim 4, characterized in that, The solubilizer is PEG - 60 hydrogenated castor oil; the preservative is phenoxyethanol and / or ethylhexylglycerin; the pH regulator is citric acid.

7. A pearl-shaped essence, characterized in that, Prepared from the skin care composition according to any one of claims 1 - 6.

8. The preparation method of the pearl-shaped essence according to claim 7, characterized in that, Including the following steps: Preparation of aqueous phase: First, heat part of the water to 70 - 80°C, then add the thickener thereto, stir until uniformly dispersed and defoamed; Then cool down to 40 - 65°C, and add niacinamide, humectant and other components, stir until uniformly dispersed and defoamed to obtain the aqueous phase; Preparation of oil phase: Mix each component of the oil phase, stir until uniformly dispersed to obtain the oil phase; Mixing: Slowly add the oil phase to the aqueous phase, supplement the remaining water, and uniformly stir the oil phase into the aqueous phase by means of up - and - down moving stirring to obtain the pearl - type essence.

9. The preparation method of the pearl-shaped essence according to claim 8, characterized in that, In the mixing step, the stirring speed is 10 - 30 rpm, and the up - and - down moving speed is 3 - 5 cm / s.

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