A composition that improves skin redness and has a soothing effect, its preparation method and application.

Abstract

This invention discloses a composition for improving skin redness and having a soothing effect, its preparation method, and its application. The composition comprises the following components: Centella asiatica extract, Hovenia dulcis fruit extract, Asarum heterotropoides root extract, and dipotassium glycyrrhizate. Through the synergistic effect of Centella asiatica extract, Hovenia dulcis fruit extract, Asarum heterotropoides root extract, and dipotassium glycyrrhizate, this invention can significantly improve redness in sensitive skin and has a certain soothing effect, making it widely applicable in cosmetics for sensitive skin.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of skin care, in particular to a composition for improving skin redness and having soothing effect, and a preparation method and application thereof. BACKGROUND

[0002] Sensitive skin refers to a high reaction state of skin under physiological or pathological conditions, mainly occurring on the face, and is clinically manifested as subjective symptoms such as burning, stinging, itching and tightness of skin when stimulated by physical, chemical, mental and other factors, accompanied or not accompanied by objective signs such as erythema, scales and telangiectasia. According to the 2020 China Female Sensitive Skin Status Research White Paper of Aier Consulting, according to the physiological performance of sensitive skin, sensitive skin can be divided into weak sensitive performance, mild sensitive performance, moderate sensitive performance and severe sensitive performance. Among them, the number of people with mild sensitive skin (itching, stinging, redness) accounts for the largest proportion, which is 43.0%. Improper use of cosmetics, staying up late and high pressure are the main factors causing sensitive skin. The mechanism of sensitive skin formation mainly includes skin barrier damage, nervous system mediated discomfort, immune response induced various symptoms, vascular dysfunction and the like, and the mechanism is complex, and each mechanism is not isolated, and the whole body is affected by one hair.

[0003] Therefore, it is of great market application prospect to develop a skin care product which can effectively improve skin redness and is suitable for sensitive skin. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a composition for improving skin redness and having soothing effect, and a preparation method and application thereof.

[0005] The purpose of the present application is achieved by the following technical solutions:

[0006] In a first aspect, the present application provides a composition for improving skin redness and having soothing effect, comprising the following components: Centella asiatica extract, Hovenia dulcis fruit extract, Rhus succedaneum root extract and dipotassium glycyrrhizinate.

[0007] Preferably, the composition comprises the following components in the following weight proportions: cyclodextrin / Centella asiatica extract 1-2 parts, water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyphenylacetone 2-5 parts, 1,3-propanediol / water / Rhus succedaneum root extract 1-3 parts and dipotassium glycyrrhizinate 0.02-0.1 part.

[0008] More preferably, the composition comprises the following components in the following weight proportions: cyclodextrin / Centella asiatica extract 2 parts, water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyphenylacetone 3 parts, 1,3-propanediol / water / Rhus succedaneum root extract 2 parts and dipotassium glycyrrhizinate 0.05 part.

[0009] Secondly, the present invention provides the application of a composition that improves skin redness and has a soothing effect in the preparation of cosmetics.

[0010] Preferably, the dosage form of the cosmetic is any one of cream, lotion, liquid, serum, mask, gel, base makeup, spray, and facial cleanser.

[0011] Thirdly, the present invention provides an essence comprising the aforementioned composition for improving skin redness and having a soothing effect, a moisturizer, a skin emollient, a thickener, a chelating agent, a solubilizer, and a solvent.

[0012] Preferably, the components comprise the following parts by weight: 1-2 parts cyclodextrin / Centella asiatica extract, 2-5 parts water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone, 1-3 parts 1,3-propanediol / water / Scutellaria baicalensis root extract, 0.02-0.1 parts dipotassium glycyrrhizate, 8-12 parts humectant, 0.1-0.8 parts emollient, 0.1-0.5 parts thickener, 0.01-0.05 parts chelating agent, 0.05-0.2 parts solubilizer, with the solvent made up to 100 parts.

[0013] Preferably, the moisturizer is selected from at least one of glycerin, 1,3-propanediol, isopentylene glycol / p-hydroxyacetophenone / 1,2-hexanediol, water / butanediol / tremella polysaccharide, trehalose, and sodium hyaluronate;

[0014] The emollient is selected from bis-PEG-18 methyl ether dimethylsilane / tocopherol;

[0015] The thickener is selected from at least one of acrylate / C10-30 alkanol acrylate crosslinking polymers and xanthan gum;

[0016] The chelating agent is selected from disodium EDTA;

[0017] The solubilizer is selected from PPG-26-butanol polyether-26 / PEG-40 hydrogenated castor oil / water;

[0018] The solvent is selected from water.

[0019] Preferably, it further includes the following components in parts by weight: 0.05-0.2 parts of pH adjuster and 0.001-0.01 parts of fragrance.

[0020] Preferably, the pH adjuster is selected from tromethamine;

[0021] The fragrance is selected from camphor bark oil, lemongrass leaf oil, guaiac wood extract, and rose extract.

[0022] Fourthly, the present invention provides a method for preparing an essence, comprising the following steps:

[0023] The moisturizer, emollient, thickener, chelating agent, solubilizer, and a composition with anti-wrinkle and skin redness-reducing and soothing effects are weighed out in proportion and added to the solvent, and stirred evenly to obtain the essence.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This invention utilizes a combination of Centella asiatica extract, Hovenia dulcis fruit extract, Asarum heterotropoides root extract, and dipotassium glycyrrhizate, and through their synergistic effect, to prepare a composition that can significantly improve redness in sensitive skin and has a certain soothing effect, which can be widely used in cosmetics for sensitive skin. Attached Figure Description

[0026] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0027] Figure 1 The results show the changes in heme index measured using the essence prepared in Example 3 as the test substance. Detailed Implementation

[0028] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0029] The terms "preferred," "more preferably," and "more suitable" used in this invention refer to embodiments of the invention that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this invention.

[0030] It should be understood that, except in any operational instance or otherwise indicated, all figures representing the amounts of ingredients used, for example, in the specification and claims, should be understood to be modified in all cases by the term "about". Therefore, unless otherwise stated, the numerical parameters set forth in the following specification and appended claims are approximations varying with the desired performance to be obtained according to the invention. It is not at all an attempt to limit the application of the doctrine of equivalents to the scope of the claims; each numerical parameter should be interpreted at least according to the number of significant figures reported and by applying ordinary rounding techniques.

[0031] Although the numerical ranges and parameters illustrating the broad scope of the invention are approximate, the values ​​listed in the specific examples are reported as precisely as possible. However, any numerical value inherently contains some error that is necessarily caused by the standard deviation found in their respective test measurements.

[0032] The following embodiments provide a composition that improves skin redness and has a soothing effect, comprising the following components: Centella asiatica extract, Hovenia dulcis fruit extract, Asarum heterotropoides root extract, and dipotassium glycyrrhizate.

[0033] In one specific embodiment, the Centella asiatica extract is derived from Centella asiatica glycoside II from Shanghai Jiakai Biotechnology Co., Ltd., and comprises cyclodextrin and Centella asiatica extract (i.e., hereinafter referred to as cyclodextrin / Centella asiatica extract). The Centella asiatica extract may also be provided from other commercial raw materials, and this invention does not impose any particular limitation.

[0034] Centella asiatica extract possesses various pharmacological activities, including antibacterial, antioxidant, antitumor, anti-HIV reverse transcriptase activity, immunomodulatory, and antidepressant effects. It is used to treat dermatological and surgical diseases such as intractable wounds and cutaneous tuberculosis. Clinically, it is also used to treat vascular diseases, infectious hepatitis, acute glomerulonephritis, epidemic cerebrospinal meningitis, skin trauma, and mumps.

[0035] In one specific embodiment, the Hovenia dulcis fruit extract is produced by Yunzhi Qingshui (Tianjin) Technology Co., Ltd., and comprises the following raw materials: water, Hovenia dulcis fruit extract, glycerin, 1,2-hexanediol, and p-hydroxyacetophenone (i.e., the following water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone). The Hovenia dulcis fruit extract may also be provided by other commercial raw materials, and this invention does not impose any particular limitation.

[0036] The extract of Hovenia dulcis fruit, also known as Japanese raisin tree fruit, is a plant belonging to the genus Hovenia in the family Rhamnaceae. It is abundant in my country. The fruit or seeds with fleshy stalks are used medicinally, known as "Zhijuzi," and are believed to have detoxifying, thirst-quenching, anti-nausea, and diuretic effects. It contains polysaccharides, vitamins, and other components, effectively providing rich nutrients to the skin, nourishing and replenishing blood, resulting in a rosy and soft complexion. Flavonoids are the active ingredient in Hovenia dulcis, primarily composed of flavonols (glycosides), flavanols, and dihydroflavonols. These compounds possess hepatoprotective, detoxifying, antibacterial, and antioxidant properties, effectively scavenging free radicals necessary for melanin synthesis and inhibiting melanin production, thus achieving a whitening effect.

[0037] In one specific embodiment, the trade name of the Boerhavia diffusa root extract is 73650- Purchased from Shanghai Boshuo Industrial Co., Ltd., the raw material composition includes 1,3-propanediol, water, and *Smilax glabra* root extract (i.e., the 1,3-propanediol / water / *Smilax glabra* root extract described below). *Smilax glabra* root extract may also be provided by other commercial raw materials; this invention does not impose any particular limitation.

[0038] The root extract of Astragalus membranaceus is extracted from the root of Astragalus membranaceus. It contains an effective active molecule called Astragalus membranaceus ketone. This substance can reduce the activity of tyrosinase by activating PPARγ (peroxisome proliferator-activated receptor). This substance can also reduce the activity of dopa oxidase by up to 55%. It has the effect of brightening skin tone, reducing pigmentation, and has a certain oil control effect.

[0039] In one specific embodiment, the composition for improving skin redness and having a soothing effect comprises the following components in parts by weight: 1-2 parts of cyclodextrin / Centella asiatica extract, 2-5 parts of water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone, 1-3 parts of 1,3-propanediol / water / Scutellaria baicalensis root extract, and 0.02-0.1 parts of dipotassium glycyrrhizate.

[0040] The aforementioned composition, which improves skin redness and has a soothing effect, can be used to prepare cosmetics in any of the following dosage forms: creams, lotions, lotions, serums, masks, gels, foundations, sprays, and cleansers.

[0041] In the following embodiments, an essence is also specifically provided, comprising the following components in parts by weight: 1-2 parts of cyclodextrin / Centella asiatica extract, 2-5 parts of water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone, 1-3 parts of 1,3-propanediol / water / Scutellaria baicalensis root extract, 0.02-0.1 parts of dipotassium glycyrrhizate, 8-12 parts of moisturizer, 0.1-0.8 parts of emollient, 0.1-0.5 parts of thickener, 0.01-0.05 parts of chelating agent, 0.05-0.2 parts of solubilizer, 0.05-0.2 parts of pH adjuster, 0.001-0.01 parts of fragrance, with the solvent made up to 100 parts.

[0042] In one specific embodiment, the moisturizer is selected from at least one of glycerin, 1,3-propanediol, isopentylene glycol / p-hydroxyacetophenone / 1,2-hexanediol, water / butanediol / Tremella fuciformis polysaccharide, trehalose, and sodium hyaluronate.

[0043] The emollient is selected from bis-PEG-18 methyl ether dimethylsilane / tocopherol;

[0044] The thickener is selected from at least one of acrylate / C10-30 alkanol acrylate crosslinking polymers and xanthan gum;

[0045] The chelating agent is selected from disodium EDTA;

[0046] The solubilizer is selected from PPG-26-butanol polyether-26 / PEG-40 hydrogenated castor oil / water;

[0047] The pH adjuster is selected from tromethamine;

[0048] The fragrance is selected from camphor bark oil, lemongrass leaf oil, guaiac wood extract, and rose flower extract.

[0049] The solvent is selected from water.

[0050] In the following examples, all raw materials used are commercially available.

[0051] Example 1

[0052] This embodiment provides a serum that improves skin redness and has a soothing effect. The composition and weight ratio of its ingredients (total weight parts: 100 parts) are shown in Table 1. The preparation steps of the serum are as follows:

[0053] 1. Clean and disinfect the emulsifying pot before manufacturing.

[0054] 2. Add water to the water phase pot, then evenly sprinkle the acrylic (ester) / C10-30 alkanol acrylate crosslinking polymer on the water surface. After it is completely wetted, start stirring at 15 rpm and heat to 80°C to completely dissolve it.

[0055] 3. After dispersing 1,3-propanediol, xanthan gum, and sodium hyaluronate evenly, add them to the aqueous phase pot and continue stirring to dissolve;

[0056] 4. Add trehalose, glycerol and disodium EDTA to the aqueous phase pot and continue stirring to dissolve at 80°C;

[0057] 5. Pump the aqueous phase prepared in step 4 into the main pot, continue stirring at 80°C and 15 rpm, and keep warm for 30 min;

[0058] 6. Cool the main pot to 45-50℃, add the dissolved tromethamine, and stir well;

[0059] 7. Cool the main pot to 40-45℃. Add the dissolved cyclodextrin / Centella asiatica extract and dipotassium glycyrrhizate to the main pot. Then, stir and dissolve the camphor bark oil / lemongrass leaf oil / guaiac wood extract / rose extract, PPG-26-butanol polyether-26 / PEG-40 hydrogenated castor oil / water. Add the bis-PEG-18 methyl ether dimethylsilane / tocopherol, which has been heated to 36℃ and dissolved. Stir well and add it to the main pot. Then, add the isopentyl glycol / p-hydroxyacetophenone / 1,2-hexanediol, water / butanediol / Tremella fuciformis polysaccharide, water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone and 1,3-propanediol / water / Scutellaria baicalensis root extract to the main pot and continue to stir well.

[0060] 8. After mixing, maintain a mixing speed of 15 rpm and a vacuum of -0.07 MPa to defoam, then cool to 38°C before discharging.

[0061] Example 2

[0062] This embodiment provides a serum that improves skin redness and has a soothing effect. The composition and weight ratio of its ingredients (total weight parts: 100 parts) are shown in Table 1. The preparation steps of the serum are the same as in Example 1.

[0063] Example 3

[0064] This embodiment provides a serum that improves skin redness and has a soothing effect. The composition and weight ratio of its ingredients (total weight parts: 100 parts) are shown in Table 1. The preparation steps of the serum are the same as in Example 1.

[0065] Table 1

[0066]

[0067]

[0068] Comparative Example 1

[0069] This comparative example provides a serum that improves skin redness and has a soothing effect. The composition and weight ratio of its ingredients (total weight parts: 100 parts) are shown in Table 2. Compared to Example 3, it only omits the addition of water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone and 1,3-propanediol / water / Scutellaria baicalensis root extract. The preparation steps of the serum are the same as in Example 1.

[0070] Comparative Example 2

[0071] This comparative example provides a serum that improves skin redness and has a soothing effect. The composition and weight ratio of its ingredients (total weight parts: 100 parts) are shown in Table 2. Compared with Example 3, it only omits the addition of 1,3-propanediol / water / scutellaria barbata root extract. The preparation steps of the serum are the same as those in Example 1.

[0072] Comparative Example 3

[0073] This comparative example provides a serum that improves skin redness and has a soothing effect. The composition and weight ratio of its ingredients (total weight parts: 100 parts) are shown in Table 2. Compared with Example 3, it only omits the addition of water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone. The preparation steps of the serum are the same as those in Example 1.

[0074] Comparative Example 4

[0075] This comparative example provides a serum that improves skin redness and has a soothing effect. The composition and weight ratio of its ingredients (total weight parts: 100 parts) are shown in Table 2. Compared with Example 3, only cyclodextrin / centella asiatica extract is not added. The preparation steps of the serum are the same as those in Example 1.

[0076] Comparative Example 5

[0077] This comparative example provides a serum that improves skin redness and has a soothing effect. The composition and weight ratio of its ingredients (total weight parts: 100 parts) are shown in Table 2. Compared with Example 3, only dipotassium glycyrrhizate is not added. The preparation steps of the serum are the same as those in Example 1.

[0078] Table 2

[0079]

[0080]

[0081] Efficacy verification:

[0082] The serums prepared in Examples 1-3 and Comparative Examples 1-5 were used as test products for skin hemoglobin index and skin moisturizing efficacy tests. The experimental data for each group are the average values ​​of multiple test subjects (n≥10). The tests were conducted according to T / CAB O152-2022 "Test Methods for Seven Efficacy Items of Cosmetics: Anti-wrinkle, Firming, Moisturizing, Oil Control, Repairing, Nourishing, and Soothing".

[0083] 1) Subjects

[0084] Subjects were individuals aged 18-60 years who tested positive for lactic acid stinging (score ≥3 points) or were identified as having sensitive skin according to the Sensitive Skin Questionnaire.

[0085] 2) How to use

[0086] During the test, the subjects used the test substance provided by us on the test sites and could not use any other products with equivalent efficacy or that might affect the test results. The use of other daily necessities such as soap and shower gel must remain consistent. Basic face cream was applied to the blank control area of ​​each subject, while the test areas were applied with the serum and basic face cream prepared according to the respective examples and comparative proportions, according to the group assignments.

[0087] 3) Testing methods

[0088] Before the test, all subjects cleansed their faces with a uniform facial cleanser and then equilibrated for at least 20 minutes in an environment with an ambient temperature of 20-22℃ and a relative humidity of 40-60%. Subsequently, the subjects' baseline values ​​of Erythema Index (EI) and Transepidermal Water Loss (TEWL) were measured.

[0089] After the baseline test was completed, test samples were distributed to the subjects, and the subjects were guided on how to use the products according to the sample instructions. Half-face control was used throughout the process to ensure that the subjects could use the products correctly and continuously.

[0090] Subjects used the test samples at home and were followed up in the second and fourth weeks after using the test samples to retest the Erythema Index (EI) and Transepidermal Water Loss (TEWL).

[0091] Specifically, the Skin Color Index (EI) was measured using a Skin Color Meter (SKINCOLORCATCH). A decrease in this value indicates improved skin redness. The Transdermal Water Loss (TEWL) was measured using a Vapometer. A decrease in this value indicates improved skin barrier function.

[0092] 4) Test Results

[0093] 4.1 The difference and rate of change (%) of the skin hemoglobin index (EI) measured after using the serums prepared in Examples 1-3 and Comparative Examples 1-5 as test samples for 4 weeks compared with the baseline value (test results before use, week 0) are shown in Table 3.

[0094] Table 3

[0095]

[0096] EI change rate = (EI average after 4 weeks - EI average baseline value) / EI average baseline value × 100% ("-" indicates a decrease in EI value, "+" indicates an increase in EI value)

[0097] As can be seen from the results in Table 3, the EI change rate of the blank control area using basic face cream as the test substance all showed an increase to varying degrees. However, when the serum + basic face cream prepared in Examples 1-3 was used as the test substance, the difference between the test area and the blank control area was significant, and it achieved a better effect in improving skin redness. A comparison of the results of Example 3 with those of Comparative Examples 1-3 shows that when the composition of the serum used to improve skin redness and provide soothing effects was only the combination of cyclodextrin / Centella asiatica extract and dipotassium glycyrrhizate in Comparative Example 1, the EI improvement rate in the tested area was only -0.25%; when the combination of cyclodextrin / Centella asiatica extract, water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone and dipotassium glycyrrhizate in Comparative Example 2 was used, the EI improvement rate in the tested area was only -0.22%; and when the combination of cyclodextrin / Centella asiatica extract, 1,3-propanediol / water / Scutellaria baicalensis root extract and dipotassium glycyrrhizate in Comparative Example 3 was used, the EI improvement rate in the tested area was only -0.37%. The results above show that, based on the combination of cyclodextrin / Centella asiatica extract and dipotassium glycyrrhizate, adding water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone or 1,3-propanediol / water / Scutellaria baicalensis root extract alone did not significantly improve the EI improvement rate. However, when water / Hovenia dulcis fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone or 1,3-propanediol / water / Scutellaria baicalensis root extract (Example 3) was added simultaneously, the EI improvement rate reached -0.63%. Comparison of Comparative Examples 4 and 5 with Example 3 shows that when cyclodextrin / Centella asiatica extract was not added to the composition, the EI improvement rate in the tested area was 0.05%, showing no effect on improving skin redness; when dipotassium glycyrrhizate was not added to the composition, the EI improvement rate in the tested area was -0.06%, also showing almost no effect on improving skin redness. This demonstrates that in the composition used to prepare the serum of this invention, which improves skin redness and has a soothing effect, each component is indispensable and has a synergistic effect in improving skin redness. In particular, the EI change rate in the test area of ​​Example 1 reached -3.68%, which is a significant improvement compared to the blank control area, indicating that the optimized proportion of each component can significantly improve skin redness.

[0098] Figure 1 The heme index curves, plotted using the essence of Example 3 as a typical example of the test sample, show the changes in week 0, week 2, and week 4. Figure 1 The results showed that the effect of using the test sample was not obvious in the second week, but by the fourth week, the effect of using the test sample was significant, causing a significant decrease in the heme index; while the heme index of the blank control group increased significantly, and the difference between the two was significant.

[0099] 4.2 The transdermal water loss (TEWL) values ​​measured using the serums prepared in Examples 1-3 and Comparative Examples 1-5 as test samples are shown in Table 4. The baseline values ​​are the test results before use (week 0).

[0100] Table 4

[0101]

[0102] TEWL change rate = (average TEWL after 4 weeks - average baseline TEWL) / average baseline TEWL × 100% ("-" indicates a decrease in TEWL value, "+" indicates an increase in TEWL value)

[0103] As can be seen from the results in Table 4, the TEWL change rate in the blank control area using basic face cream as the test substance all showed an increase to varying degrees, while the TEWL change rate in the test area using the serum prepared in Examples 1-3 + basic face cream as the test substance all showed a decrease to varying degrees, indicating that the serum prepared in this invention has the effect of reducing transepidermal water loss. A comparison of the results of Example 3 with those of Comparative Examples 1-3 shows that when the composition of the serum used to improve skin redness and provide soothing effects was only the combination of cyclodextrin / Centella asiatica extract and dipotassium glycyrrhizate in Comparative Example 1, the combination of cyclodextrin / Centella asiatica extract, water / Hovenia dulcis extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone and dipotassium glycyrrhizate in Comparative Example 2, the combination of cyclodextrin / Centella asiatica extract, 1,3-propanediol / water / Smilax china root extract and dipotassium glycyrrhizate in Comparative Example 3, the combination of no cyclodextrin / Centella asiatica extract or no dipotassium glycyrrhizate in Comparative Example 4, the TEWL change rate in the tested areas all decreased, but the decrease was not as significant as the EI change rate. This indicates that in the composition used in this invention to improve skin redness and provide soothing effects, the components do not have a synergistic effect in reducing transepidermal water loss.

[0104] This invention has many specific applications, and the above description is only a preferred embodiment. It should be noted that the above embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this invention. For those skilled in the art, several improvements can be made without departing from the principle of this invention, and these improvements should also be considered within the scope of protection of this invention.

Claims

1. A composition for improving skin redness and having a soothing effect, characterized by, consisting of: cyclodextrin / centella asiatica extract 2 parts, water / retama racemosa fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone 3 parts, 1,3-propanediol / water / centella asiatica extract 2 parts, dipotassium glycyrrhizate 0.05 parts.

2. Use of the composition for improving skin redness and having soothing effect according to claim 1 in the preparation of a cosmetic.

3. Use according to claim 2, characterized in that, The dosage form of the cosmetic is any one of cream, lotion, water, serum, jelly, spray product.

4. An essence characterized by, The composition for improving skin redness and having soothing effect according to claim 1, humectant, emollient, thickening agent, chelating agent, solubilizing agent and solvent are included.

5. The serum of claim 4, wherein the serum is characterized by, consisting of: cyclodextrin / centella asiatica extract 2 parts, water / retama racemosa fruit extract / glycerin / 1,2-hexanediol / p-hydroxyacetophenone 3 parts, 1,3-propanediol / water / centella asiatica extract 2 parts, dipotassium glycyrrhizate 0.05 parts, humectant 8-12 parts, emollient 0.1-0.8 parts, thickening agent 0.1-0.5 parts, chelating agent 0.01-0.05 parts, solubilizing agent 0.05-0.2 parts, solvent to 100 parts.

6. The serum of claim 5, wherein, The humectant is at least one selected from glycerin, 1,3-propanediol, isopropylidene acetophenone / 1,2-hexanediol, water / butylene glycol / tremella polysaccharide, trehalose, sodium hyaluronate; The emollient is selected from bis-PEG-18 methyl ether dimethyl silane / tocopherol; The thickening agent is at least one selected from acrylate / C10-30 alkanol acrylate crosspolymer, xanthan gum; The chelating agent is selected from disodium EDTA; The solubilizing agent is selected from PPG-26-butyl polyether-26 / PEG-40 hydrogenated castor oil / water; The solvent is selected from water.

7. The serum according to claim 4 or 5, characterized in that, The pH adjusting agent is selected from tromethamine; 8. The serum of claim 7, wherein, The fragrance is selected from cypress bark oil / lemongrass leaf oil / guaiacum wood extract / rose flower extract. The steps include:

9. A method of preparing the serum according to any one of claims 4-8, characterized in that, The humectant, emollient, thickening agent, chelating agent, solubilizing agent and composition for improving skin redness and having soothing effect are weighed in proportion and added to the solvent, stirred uniformly, and the serum is obtained. The steps include: The humectant, emollient, thickening agent, chelating agent, solubilizing agent and composition for improving skin redness and having soothing effect are weighed in proportion and added to the solvent, stirred uniformly, and the serum is obtained.

Images