Tightening, whitening and anti-allergy nursing essence and preparation method thereof

Abstract

The invention relates to a tightening, whitening and anti-allergy nursing essence and a preparation method thereof, and the tightening, whitening and anti-allergy nursing essence is prepared from 0.15-0.3% of locust bean gum hydroxypropyl trimethyl ammonium chloride, 0.15-0.3% of vitamin C, 0.15-0.3% of vitamin C and the balance of deionized water. 3-4% of a salvia miltiorrhiza root extract; 0.02% to 0.05% of guaiazulene sodium sulfonate; 8 to 10% of palmitamide hexadecane glycol; 0.1 to 0.4 percent of tranexamic acid; 0.8% to 1.2% of sodium erythorbate; 0.5-1% of an auxiliary agent; and a proper amount of deionized water. The invention discloses a preparation method of tightening, whitening and anti-allergy nursing essence. The preparation method comprises the following steps: S1, dissolving locust bean gum hydroxypropyl trimethyl ammonium chloride, tranexamic acid and sodium erythorbate; s2, mixing and dissolving palmitamide hexadecane glycol and the salvia miltiorrhiza root extract; s3, heating and stirring until clarification, and keeping the temperature; s4, cooling, adding guaiazulene sodium sulfonate, and stirring until the solution is clear; s5, adding the auxiliary agent and the residual deionized water, and uniformly stirring; and S6, collecting and storing after the pH value is detected to be qualified. The essence is scientific in formula, has the three effects of whitening, tightening and resisting allergy, is good in stability and efficient in preparation process, and is suitable for people with sensitive skin to use.

Description

Technical Field

[0001] The present application relates to the technical field of cosmetic care, and in particular to a firming, whitening and anti-allergic care essence and a preparation method thereof. Background Art

[0002] Dull and sagging skin is an inevitable problem with aging. When the skin ages naturally or is exposed to external stimuli such as ultraviolet rays, the production of tyrosinase will be accelerated and its activity will be increased, thereby producing melanin. These melanins will be transported by melanocytes to the surrounding keratinocytes to protect the skin from ultraviolet damage. As the melanin increases, the skin color will become darker, making the skin darker. At the same time, the collagen and elastin in the skin gradually decrease, causing the skin to lose its support and become sagging.

[0003] As people's pursuit of beauty continues to improve, more and more people begin to pay attention to skin problems and choose to use skin care products to improve dull and sagging skin. Among many skin care products, essence is favored by consumers for its high penetration and high concentration of active ingredients. Compared with other skin care products, essence can penetrate deeper into the deep layers of the skin and provide comprehensive care for the skin. Therefore, essence with firming and whitening functions has also come into being to meet consumers' needs for skin whitening and help them restore their skin's firmness and radiance.

[0004] Although the whitening and firming essences currently on the market can help improve dull and sagging skin, they contain more irritating whitening ingredients and high concentrations of active substances, which can cause irritation and damage to the skin. Especially for sensitive skin, they are more likely to cause allergic reactions. These irritations and damages may cause skin redness, itching, stinging and other uncomfortable symptoms, and may even aggravate skin sensitivity problems.

[0005] Therefore, successfully developing an essence that can be used by people with sensitive skin while improving skin brightness, firmness and alleviating skin sensitivity will not only help them stand out in the market segment, but also bring consumers a better skin care experience and promote the further development of the skin care market. Summary of the invention

[0006] In order to solve the problem that there is a lack of a firming, whitening and anti-allergic care essence in the market segment that can effectively improve skin dullness and sagging, reduce irritation and damage, and is particularly suitable for sensitive skin, the present application provides a firming, whitening and anti-allergic care essence.

[0007] In the first aspect, the present application provides a firming, whitening and anti-allergic care essence using the following technical solution: A firming, whitening and anti-allergic care essence, calculated by mass percentage, consists of the following components: Robinia carob gum hydroxypropyltrimethylammonium chloride: 0.15-0.3%; Salvia miltiorrhiza root extract: 3-4%; Sodium guaiacyl sulfonate: 0.02%-0.05%; Palmitamido hexadecanediol: 8-10%; Tranexamic acid: 0.1-0.4%; Sodium isoascorbate: 0.8-1.2%; Additives: 0.5-1%; Deionized water: appropriate amount.

[0008] By adopting the above technical solution: the firming, whitening and anti-allergic care essence combines the three major functions of whitening, firming and anti-allergy, providing users with a comprehensive and efficient skin care solution. This essence can not only effectively improve skin dullness and sagging problems, but also soothe sensitive skin, reduce irritation and damage, so that sensitive skin can also enjoy the whitening and firming skin care effects.

[0009] Preferably, the auxiliary agent is selected from one or more of a thickener, a surfactant and a humectant.

[0010] By adopting the above technical solution: the selection and use of a variety of additives can effectively enhance the stability and use experience of the product.

[0011] Preferably, the thickener is selected from one or more of high molecular weight polyhydrates or xanthan gum.

[0012] By adopting the above technical solution: the high molecular weight water polymer can effectively adjust the viscosity and consistency, making the essence easier to apply and evenly distribute. At the same time, by improving fluidity, it enhances product stability and prevents separation and precipitation. In addition, it can also bring a silky touch to the essence and improve the comfort of use; The rheological properties of xanthan gum make the essence easy to apply and maintain viscosity. Its strong hydrophilicity provides moisturizing effect and reduces water loss. Its double helix structure enhances antioxidant and anti-enzymatic capabilities, protects active ingredients and improves product stability.

[0013] Preferably, the surfactant is poloxamer.

[0014] By adopting the above technical solution: Poloxamer has moisturizing and water-locking functions. It can not only absorb water molecules in the air, but also lock moisture in the surface of the skin. It has strong viscosity and can increase the viscosity of skin care products, making them easier to apply and absorb. At the same time, it can also combine with other components to play a synergistic role, thereby better exerting its moisturizing effect.

[0015] In the second aspect, the present application provides a method for preparing a firming, whitening and anti-allergic care essence, which adopts the following technical solution: A preparation method of a firming, whitening and anti-allergic care essence, comprising the following steps: S1. Add locust bean gum hydroxypropyltrimethylammonium chloride into a stirring tank, dissolve it completely with part of deionized water, then add tranexamic acid and sodium isoascorbate, disperse them evenly, and preheat; S2, dissolving the salvia miltiorrhiza root extract with palmitamide hexadecanediol mixed with a portion of deionized water, and putting the mixture into a stirring tank after the extract is completely dissolved; S3. Heat the stirring tank to 40-50°C, stir until the contents in the pot are dissolved and clarified, then keep warm; S4, then lower the temperature, add sodium guaiacyl sulfonate into the stirring tank, and stir until clear; S5. Lower the temperature to room temperature, add the additive and the remaining deionized water into the stirring tank, and stir evenly; S6. Take samples and test their pH value. After the samples are qualified, collect and store them to obtain the firming, whitening and anti-allergic care essence.

[0016] By adopting the above technical solution: a product with excellent effect, good stability and high safety can be prepared, and the entire preparation process only includes the steps of dissolving, mixing, stirring, temperature control, etc., which is simple to operate and easy to realize industrial production.

[0017] Preferably, the preheating temperature in S1 is 30-35° C., and the preheating time is 5-10 min.

[0018] By adopting the above technical solution, it is ensured that the raw materials can be dissolved quickly and evenly at an appropriate temperature, providing a good foundation for the subsequent reaction process. Appropriate preheating can not only accelerate the dissolution of the raw materials, but also reduce the time and energy consumption of subsequent heating, thereby improving production efficiency.

[0019] Preferably, the insulation time in S3 is 10-15 min.

[0020] By adopting the above technical solution: the holding time in S3 is 10-15 minutes. This setting is to ensure that the substances in the tank are fully dissolved and mixed evenly, while avoiding the loss of active ingredients caused by too long a holding time. Through a reasonable holding time, while ensuring product quality, production efficiency can be improved and energy consumption can be reduced.

[0021] Preferably, the pH value of S6 is 6.9-7.1.

[0022] By adopting the above technical solution: pH value is one of the key factors affecting the stability and effect of skin care products. The pH value in S6 is set to 6.9-7.1. This range of pH values ​​is conducive to maintaining the stability and activity of the product without causing irritation to the skin. Accurate control of pH value can also ensure the safety and effectiveness of the product and meet the needs of consumers.

[0023] In summary, this application includes the following beneficial technical effects: 1. This application uses carefully selected active ingredients such as Robinia Carob Bean Gum Hydroxypropyltrimonium Chloride, Salvia Miltiorrhiza Root Extract, Sodium Guaiac Azulene Sulfonate, etc. The essence combines the three major effects of whitening, firming and anti-allergy, providing users with a comprehensive and efficient skin care solution; 2. Through precise formula design and scientific preparation process, the essence exhibits excellent stability. The appropriate pH range (6.9-7.1) ensures the safety of the product and does not cause irritation to the skin, while ensuring the effectiveness of the active ingredients; 3. This application significantly improves the product's user experience by optimizing the selection of auxiliary agents, such as thickeners, surfactants and moisturizers. Thickeners such as high molecular weight polyhydrates and xanthan gum make the essence easier to apply and evenly distribute, while surfactants such as poloxamer enhance the product's moisturizing and water-locking functions, bringing users an excellent user experience; 4. The preparation method of the essence in this application includes simple steps such as dissolving, mixing, stirring, and temperature control, which is easy to realize industrial production. Reasonable preheating and insulation time settings improve production efficiency, reduce energy consumption, and provide support for the sustainable development of the enterprise. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the examples. Except for the special instructions below, the raw materials used in the present application are all common commercially available materials.

[0025] Performance testing test It should be noted that the test subjects selected in this experiment are all people with sensitive skin intolerance, 150 women with an average age of about 32 years old, randomly divided into 15 groups, 10 people in each group; each group uses the same essence; The testing instrument is Cortex DermaLab Combo (Denmark) 1. Whitening effect test: The testers applied the product twice a day, morning and evening, after washing their faces. The left face was applied with the example or comparative sample, and the right face was a blank sample. The application lasted for 4 weeks. The change in color brightness (ΔL * ), ITA degree is used to characterize, where ΔL * =[L * (Comparative Example or Example sample was tested for 1 month) -L * (Before the test begins)]-[L * (Blank product tested 1 month later) -L *(before the test begins)], ITA degree represents the overall change in chromaticity. The larger the ITA value, the lighter the skin color. The result is the average value of each group. The specific ITA degree range and the corresponding skin color classification are shown in the following table: Table: ITA range and corresponding skin color ITA Degree Range Skin color classification 55-90 Very light 41-54 Light 28-40 Intermediate 10-27 Tanned ﹣30-9 Brown ﹣90-﹣29 Dark 2. Firming effect test Referring to the "Test Method for Anti-wrinkle Efficacy of Cosmetics" (T / ZHCA006-2019), the seven-level method was used: 56 subjects with the same level of wrinkles on the left and right outer corners of the eyes in the first whitening effect test were selected, with 7 subjects in each group, and divided into 8 groups; The tester washes his face with water every morning and evening and applies the example or comparative sample to the left outer corner of the eye, and the blank sample to the right outer corner of the eye, and continues to apply for 4 weeks; Descriptive statistics were performed on the measurement values ​​of the wrinkle target analysis positions in the sample smear area and the blank area, and the differences between the initial values ​​of the wrinkle target analysis positions in the sample smear area and the blank area and the measurement values ​​at other measurement time points were calculated respectively. The differences between the sample smear area and the blank area at different measurement time points were statistically analyzed using the differences. ΔV 样品 =V0-V t Where: ΔV 样品 The average value of the total volume difference of the wrinkles on the sample application side, in cubic millimeters (mm 2 ); V0 is the average value of the total initial volume of wrinkles on the sample application side, in cubic millimeters (mm 2 ); V t The average value of the total volume of wrinkles on the sample application side at different measurement time points after the sample is applied, in cubic millimeters (mm 2 ); ΔV 空白 =V r0 -V rt Where: ΔV 空白 The average value of the total volume difference of the blank side wrinkles, in cubic millimeters (mm 2 ); V r0 The blank side is the average value of the total wrinkle volume at different measurement time points, in cubic millimeters (mm 2 ); V rt is the average value of the initial value of the total volume of wrinkles on the blank side, in cubic millimeters (mm 2 ); ΔV=ΔV样品 -ΔV 空白 δ=ΔV / ΔV 样品 100%, all results are averaged; Evaluation criteria: Compared with the blank sample, the difference in the measured value of the sample smear side is significantly different, and ΔV>0, indicating that the tested sample has anti-wrinkle and firming effects; Compared with the blank sample, there is no significant difference in the measured value of the sample application side, and ΔV≦0, indicating that the tested sample has no anti-wrinkle and firming effects; 3. Anti-allergic effect test The remaining 36 subjects were randomly selected and divided into 2 groups, 18 in each group, one of which was a blank test group; Use patch test: drip the sample of the embodiment or comparative example onto the filter paper attached to the patch tester and place it in the patch tester. Apply the patch tester with the sample of the embodiment or comparative example to the forehead of the subject with a non-irritating tape. The patch tester of the blank test group does not add any sample. Use the palm of your hand to gently press it to evenly apply it to the skin for 24 hours. Remove the patch tester of the test substance 30 minutes later. After the indentation disappears, observe the skin reaction. Observe again 24 hours and 48 hours after the patch test. Record the reaction results according to the following table: Table: Skin reaction grading standards 4. Stability Test The examples or comparative examples were placed in thermostats at -15°C, 5°C, 25°C (room temperature), 37°C, 45°C, and 50°C, as well as D65 (cold color) and TL84 (warm color), respectively. After 24 h, 48 h, 1 week, 2 weeks, 4 weeks, 8 weeks, and 12 weeks at room temperature and away from light, the samples were taken out and restored to 25 degrees Celsius (room temperature) for inspection and recording. The cycle was repeated twice, and the stability of the samples was comprehensively evaluated from the appearance and odor. Example

[0026] Example 1 A firming, whitening and anti-allergic care essence, the components and the corresponding dosages of which are shown in the following table, and is prepared by the following preparation method: S1. Add locust bean gum hydroxypropyltrimethylammonium chloride into a stirring tank, dissolve it completely with 20%wt deionized water, then add tranexamic acid and sodium isoascorbate, disperse them evenly, and preheat at 33°C for 8 minutes; S2, dissolving the salvia miltiorrhiza root extract by mixing palmitamide hexadecanediol with 40%wt deionized water, and putting the mixture into a stirring tank after the extract is completely dissolved; S3. Heat the stirring tank to 45°C, stir until the contents in the pot are dissolved and clarified, and keep warm for 15 minutes; S4, then lower the temperature to 30°C, add sodium guaiacyl sulfonate into the stirring tank, and stir until it becomes clear; S5. Lower the temperature to room temperature, add the additive and the remaining deionized water into the stirring tank, and stir evenly; S6. Take samples and test the pH value to find that it is 7.1. After passing the test, collect and store the samples to obtain the firming, whitening and anti-allergic care essence.

[0027] Table: Components and their contents in the serum of Example 1 (%) The main components of the auxiliary agents are shown in the table below, calculated by mass percentage, wherein the thickener:surfactant = 1:1.

[0028] Table: Auxiliary agents and their components in the serum of Example 1 Additives Element Thickener Xanthan gum Surfactants Poloxamer Moisturizer / The essence prepared in Example 1 was sampled and tested for whitening effect, firming effect, anti-allergic effect and stability. The test results are as follows: Table: Whitening effect test results of Example 1 sample <![CDATA[ΔL * ]]> ITA°(after) ITA°(former) Example 1 5.21 40 26 Table: Test results of the firming effect of Example 1 sample ΔV Δ(%) Example 1 >0 44 Table: Anti-allergic effect test results of Example 1 sample 24h 48h 72h Example 1 0 0 0 Table: Stability test results of Example 1 It can be seen from the above test results that the essence sample prepared in Example 1, after a 12-week stability test, has stable physical and chemical properties and significant whitening effect, with skin firming improvement reaching an average of 44%. For subjects with sensitive skin, no adverse reactions occurred, indicating that the essence is non-irritating; therefore, it can be seen that the firming, whitening and anti-allergic care essence combines the three major effects of whitening, firming and anti-allergy, and can not only effectively improve skin dullness and sagging problems, but also soothe sensitive skin, reduce irritation and damage, so that sensitive skin can also enjoy the whitening and firming skin care effects.

[0029] Analysis of the possible reasons: Salvia miltiorrhiza root extract and active substances such as Robinia carob gum hydroxypropyltrimonium chloride show excellent synergistic effects in the process of skin care. Specifically, Robinia carob gum hydroxypropyltrimonium chloride can cleverly form a protective film on the skin surface, which can not only reduce the irritation of the external environment to the skin, but also effectively regulate the moisture balance on the skin surface to keep the skin hydrated. At the same time, Salvia miltiorrhiza root extract exerts its unique function to promote the production of hyaluronic acid in the skin. This mechanism provides deep hydration for the skin and helps to tighten and contract the skin.

[0030] In addition to the above-mentioned moisturizing effect, Salvia miltiorrhiza root extract can further improve the health of the skin by improving the skin's microcirculation. When it is combined with sodium erythorbate and tranexamic acid, they can work together to effectively inhibit the production of melanin and enhance the brightness of the skin, thereby achieving the effect of cleansing and whitening the skin. The synergistic effect of this multiple mechanism makes the essence perform well in whitening.

[0031] It is worth mentioning that the whitening function is usually accompanied by a certain degree of irritation. However, in this Example 1, by carefully adjusting the dosage of tranexamic acid and compounding active substances such as salvianolic acid in the Salvia miltiorrhiza root extract with sodium guaiacyl sulfonate, this irritation is effectively reduced. After compounding, these ingredients have a soothing effect on the skin, can reduce the discomfort that may be caused by whitening ingredients, and allow sensitive skin to enjoy a gentle and effective skin care experience.

[0032] Embodiment 2-6 A firming, whitening and anti-allergic care essence, which is different from Example 1 in that each component The content of the points is different.

[0033] Table: Components and their contents in the essences of Examples 2-6 (%) The essences prepared in Examples 2-6 were sampled and tested for whitening effect, firming effect, anti-allergic effect and stability. The test results are as follows: Table: Whitening effect test results of Examples 2-6 sample <![CDATA[ΔL * ]]> ITA°(after) ITA°(former) Example 2 5.06 38 26 Example 3 5.34 42 26 Example 4 5.32 40 27 Example 5 5.33 41 26 Example 6 5.34 41 27 Table: Tightening effect test results of Examples 2-6 sample ΔV Δ(%) Example 2 >0 41 Example 3 >0 48 Example 4 >0 45 Example 5 >0 45 Example 6 >0 44 Table: Anti-allergic effect test results of Examples 2-6 sample 24h 48h 72h Example 2 0 0 0.1 Example 3 0 0 0 Example 4 0 0 0 Example 5 0 0 0 Example 6 0 0 0 Table: Stability test results of Examples 2-6 It can be seen from the above test results that the physical and chemical properties of the essence samples prepared in Examples 2-6 were stable after the stability test lasted for 12 weeks. As for the color deepening in Examples 3-6 in the 2nd to 8th week, the possible reason is speculated that the color of the essence deepens as the content of the Salvia miltiorrhiza root extract increases, because the Salvia miltiorrhiza root extract itself has a darker reddish brown color. Moreover, the whitening effect was excellent. In particular, in Example 3, the Δ value reached 48%, which means that it was effective in improving the firmness of the skin and improving wrinkles. As for Example 2, a very weak irritation appeared 72 hours after the patch test. It is speculated that this may be due to the decrease in the content of palmitamide hexadecanediol and the reduction of the synergistic effect with locust bean gum hydroxypropyltrimethylammonium chloride, which made the irritating whitening component directly contact with the exposed skin. As the dosage of core active ingredients such as salvia miltiorrhiza root increases, the whitening effect on the skin is also improved. This may be because the active ingredients in salvia miltiorrhiza root, such as salvianolic acid, can more effectively inhibit the production of melanin or accelerate its metabolism, thereby achieving a more significant whitening effect. However, when the content of sodium erythorbate increases, its anti-wrinkle and skin firming effects decrease slightly. This may be due to the following reasons: 1) Irritation caused by excessive concentration: Although sodium erythorbate has anti-wrinkle and skin tightening effects, when its concentration is too high, it may cause certain irritation to the skin. This irritation may cause skin discomfort and affect the normal metabolism and repair of the skin, thereby affecting its anti-wrinkle and tightening effects; 2) Interactions between ingredients: In essences, different ingredients may interact with each other. When the content of sodium erythorbate increases, it may interact with other ingredients such as salvia miltiorrhiza root extract, thereby affecting each other's efficacy. This interaction may lead to a decrease in the anti-wrinkle and firming effects of sodium erythorbate. 3) Limitation of skin absorption capacity: The skin's absorption capacity is limited. When the concentration of ingredients in the essence is too high, it may exceed the skin's absorption capacity, resulting in some ingredients being unable to be fully absorbed and utilized by the skin, which may lead to a decrease in the anti-wrinkle and firming effects.

[0034] Example 7 A firming, whitening and anti-allergic care essence, which is different from Example 1 in that the usage of its auxiliary agents is different. In terms of weight percentage, the thickener: surfactant = 1:1, and the degree of polymerization of the high molecular weight polyhydrate is 12000.

[0035] Table: Additives and ingredients in the serum of Example 7 Additives Element Thickener Polymer water Surfactants Poloxamer Moisturizer / Example 8 A firming, whitening and anti-allergic care essence, which is different from Example 1 in that the usage of its auxiliary agents is different. By weight percentage, the thickener: surfactant = 1:1, the degree of polymerization of the high molecular weight polyhydrate is 12000, and the content of the high molecular weight polymer and xanthan gum is equivalent.

[0036] Table: Auxiliary agents and their components in the serum of Example 8 Additives Element Thickener Polymer and xanthan gum Surfactants Poloxamer Moisturizer / Example 9 A firming, whitening and anti-allergic care essence, which is different from Example 1 in that the use of its auxiliary agents is different.

[0037] Table: Auxiliary agents and their components in the serum of Example 9 Additives Element Thickener Xanthan gum Surfactants / Moisturizer / Example 10 A firming, whitening and anti-allergic care essence, which is different from Example 1 in that the usage of its auxiliary agents is different, wherein, by weight percentage, the thickener: surfactant: moisturizer = 1:1:1.

[0038] Table: Auxiliary agents and their components in the essence of Example 10 Additives Element Thickener Xanthan gum Surfactants Poloxamer Moisturizer Butanediol The essences prepared in Examples 7-10 were sampled and tested for whitening effect, firming effect, anti-allergic effect and stability. The test results are as follows: Table: Whitening effect test results of Examples 7-10 Table: Tightening effect test results of Examples 7-10 sample ΔV Δ(%) Example 7 >0 51 Example 8 >0 46 Example 9 >0 30 Example 10 >0 45 Table: Anti-allergic effect test results of Examples 7-10 sample 24h 48h 72h Example 7 0 0 0 Example 8 0 0 0 Example 9 0 0.1 0.2 Example 10 0 0.3 0.5 Table: Stability test results of Examples 7-10 From the above test results, we can draw the following conclusions: In Examples 7 and 8, although different thickeners were selected, these changes had almost no effect on the whitening, firming and anti-allergic effects of the essence.

[0039] However, we observed some significant changes in physical properties. In particular, when only high molecular weight polyhydric acid was used as a thickener, after 12 weeks of stability testing, the essence showed stratification and precipitation at weeks 8-12, and the color changed from reddish brown to reddish brown. This change is likely due to oxidation or degradation of the high molecular weight polyhydric acid during long-term storage or improper handling. The low solubility or insufficient stability of the high molecular weight polyhydric acid led to the precipitation, stratification and color change of the essence.

[0040] In Examples 9-10, there are new changes in the selection of the types of auxiliary agents. In Example 9, no surfactant, namely poloxamer, is added. This results in a score of 0.1 and 0.2 at the 48h and 72h nodes in the anti-allergic effect test, i.e., very slight erythema, indicating that there is still very low irritation. After removing poloxamer, the compatibility and stability of other ingredients may change. If there are interactions or incomplete compatibility between other ingredients, this may increase irritation to the skin, and palmitamide hexadecanediol and poloxamer can play a synergistic role, can enhance permeability, effectively soothe sensitive skin, and reduce irritation; In Example 10, butylene glycol is used as an additional moisturizer. However, in the anti-allergic effect test, the scores of 0.3 and 0.5 appeared at the 48h and 72h nodes, respectively, which means that slight erythema appeared and it has low irritation. Butylene glycol, as a common moisturizing ingredient, is generally able to effectively provide moisture to the skin. However, it may exceed the tolerance range of sensitive skin and cause slight irritation. In addition, the interaction between butylene glycol and other skin care ingredients is also a potential problem. In some cases, these ingredients may react chemically with butylene glycol or form substances that are not conducive to skin absorption, thereby further increasing skin irritation. This interaction may weaken the moisturizing effect of butylene glycol and may even cause skin discomfort or allergic reactions; When considering the addition of butylene glycol as a humectant, we found that the formula already contained other ingredients with hydrating properties. Palmitamidohexadecanediol can provide hydration on its own, while Salvia miltiorrhiza root extract can promote the production of hyaluronic acid, further enhancing the skin's moisture content. In addition, Robinia carob gum hydroxypropyltrimonium chloride also has a moisture-balancing effect. Therefore, with these ingredients already present, there does not seem to be a strong reason to add butylene glycol as a humectant, especially considering the skin irritation reaction that butylene glycol may cause on sensitive skin.

[0041] Comparative Example 1 A firming, whitening and anti-allergic care essence, which is different from Example 1 in that an equal amount of allantoin is used to replace sodium guaiacyl sulfonate.

[0042] Comparative Example 2 A firming, whitening and anti-allergic care essence, which is different from Example 1 in that an equal amount of Centella asiatica extract is used to replace the Salvia miltiorrhiza root extract.

[0043] Comparative Example 3 A firming, whitening and anti-allergic care essence, which is different from Example 1 in that no preheating operation is performed in S1.

[0044] Comparative Example 4 A firming, whitening and anti-allergic care essence, which is different from Example 1 in that no heat preservation operation is performed in S3.

[0045] The essences prepared in Comparative Examples 1-4 were sampled and tested for whitening effect, firming effect, anti-allergic effect and stability. The test results are as follows: Table: Whitening effect test results of comparative examples 1-4 sample <![CDATA[ΔL * ]]> ITA°(after) ITA°(former) Comparative Example 1 3.1 33 26 Comparative Example 2 3.3 32 26 Comparative Example 3 2.7 28 26 Comparative Example 4 2.9 30 26 Table: Comparative Examples 1-4 Tightening Effect Test Results Table: Anti-allergic effect test results of Comparative Examples 1-4 sample 24h 48h 72h Comparative Example 1 0 0 0 Comparative Example 2 0 0 0 Comparative Example 3 0 0 0 Comparative Example 4 0 0 0 Table: Stability test results of comparative examples 1-4 From the above test results, Comparative Examples 1-4 all showed excellent results in the anti-allergic effect test, indicating that these changes did not have a significant negative impact on the anti-allergic performance. However, in the whitening effect test, the ΔL* values ​​of these comparative examples were between 2.7 and 3.3, and the ITA° (after) values ​​were between 28 and 33, which means that their whitening effects on the skin are relatively weak.

[0046] Particularly noteworthy is Comparative Example 2. Although Centella asiatica extract generally promotes collagen synthesis and may have a positive effect on firming, its ΔV value is ≤0, which clearly shows that the efficacy of this solution in anti-wrinkle and skin firming is almost non-existent. It may be because other ingredients in Comparative Example 2 may be incompatible with Centella asiatica extract, or have opposite effects, thereby offsetting the firming effect of Centella asiatica extract. And the ΔV values ​​of Comparative Examples 1, 3, and 4 are >0, but this does not mean that they have significant effects in anti-wrinkle and firming, because Δ(%) is between 12-25, which is a slight improvement.

[0047] As for Comparative Examples 3 and 4, in the stability test, stratification occurred in the 8th and 4th weeks, respectively, and Comparative Example 4 even showed precipitation in the 12th week. This is because the failure to perform a preheating operation may result in incomplete dissolution or dispersion of active substances such as salvia miltiorrhiza root extract in the mixture of palmitamide hexadecanediol and deionized water, thereby increasing the risk of stratification and precipitation. Failure to perform a heat preservation operation may affect the stability and compatibility of the system, and easily lead to precipitation.

[0048] The above are all modifications without creative contribution or solutions that obviously constitute technical inspiration that can be made to the present embodiment as needed by technical personnel in this field after reading this specification, but they should be protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. A firming, whitening and anti-allergic care essence, characterized in that: Calculated by mass percentage, it is composed of the following components: Robinia carob gum hydroxypropyltrimonium chloride: 0.15-0.3%; Salvia miltiorrhiza root extract: 3-4%; Sodium guaiacyl sulfonate: 0.02%-0.05%; Palmitamido hexadecanediol: 8-10%; Tranexamic acid: 0.1-0.4%; Sodium isoascorbate: 0.8-1.2%; Additives: 0.5-1%; Deionized water: appropriate amount.

2. The firming, whitening and anti-allergic care essence according to claim 1, characterized in that: The auxiliary agent is selected from one or more of a thickener, a surfactant, and a humectant.

3. The firming, whitening and anti-allergic care essence according to claim 2, characterized in that: The thickener is selected from one or more of high molecular weight polyhydrates or xanthan gum.

4. The firming, whitening and anti-allergic care essence according to claim 2, characterized in that: The surfactant is poloxamer.

5. The method for preparing the firming, whitening and anti-allergic care essence according to any one of claims 1 to 4, characterized in that: The following preparation steps were adopted: S1. Add locust bean gum hydroxypropyltrimethylammonium chloride into a stirring tank, dissolve it completely with part of deionized water, then add tranexamic acid and sodium isoascorbate, disperse them evenly, and preheat; S2, dissolving the salvia miltiorrhiza root extract with palmitamide hexadecanediol mixed with a portion of deionized water, and putting the mixture into a stirring tank after the extract is completely dissolved; S3. Heat the stirring tank to 40-50°C, stir until the contents in the pot are dissolved and clarified, then keep warm; S4, then lower the temperature, add sodium guaiacyl sulfonate into the stirring tank, and stir until clear; S5. Lower the temperature to room temperature, add the additive and the remaining deionized water into the stirring tank, and stir evenly; S6. Take samples and test their pH value. After the samples are qualified, collect and store them to obtain the firming, whitening and anti-allergic care essence.

6. The method for preparing the firming, whitening and anti-allergic care essence according to claim 5, characterized in that: The preheating temperature in S1 is 30-35° C., and the preheating time is 5-10 min.

7. The method for preparing the firming, whitening and anti-allergic care essence according to claim 5, characterized in that: The insulation time in S3 is 10-15 minutes.

8. The method for preparing the firming, whitening and anti-allergic care essence according to claim 5, characterized in that: The pH value of S6 is 6.9-7.1.

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