Sunscreen composition and preparation method thereof

Abstract

The invention aims to provide a sunscreen composition containing a plant source, and the sunscreen composition is prepared from the following components: 0.005 to 0.4 percent of fructus chebulae extract, 0.005 to 0.44 percent of green tea freeze-dried powder, 0.5 to 4.5 percent of water-based sunscreen agent, 8 to 20 percent of oily sunscreen agent, 1 to 6 percent of emulsifier and the balance of water. The sunscreen composition has a synergistic sunscreen effect, can resist skin oxidative damage and skin aging, relieves after-sun skin, repairs and relieves reddish skin, and is fresh and non-greasy. And the sunscreen composition has good film forming effect, spreadability and smearing uniformity, and has a wide market prospect.

Description

Technical Field

[0001] The present invention relates to the field of sunscreen cosmetics, and further to a sunscreen composition containing plant ingredients and a preparation method thereof. Background Art

[0002] Human beings are exposed to sunlight for a long time, and the most harmful to the human body is ultraviolet light (UV). Ultraviolet rays can be divided into UVA (320-400nm), UVB (290-320nm) and UVC (200-290nm) according to their wavelength. The shorter the wavelength, the greater the biological hazard. UVC is absorbed by the ozone layer, so it will not reach the surface of the earth and cause damage to the skin. However, UVA and UVB can reach the dermis and epidermis of the skin respectively, inducing lipid peroxidation, protein oxidation modification, etc., causing different degrees of damage to the skin and leading to premature aging of the skin. It is reported that UVB is the most destructive component of solar radiation reaching the earth's surface. UVA has a high content in ultraviolet rays and strong penetration. It penetrates into the dermis, causing irreversible damage and skin aging. At the same time, UVA is concealed. It can penetrate glass into the room and the car. It changes little with the seasons, so it is more deceptive and causes you to be harmed without knowing it. If the skin is exposed to ultraviolet rays for a long time, it will bring various adverse effects to the skin, such as skin redness, swelling, pain, hyperplasia, inflammation, erythema and immunosuppression, and may even develop into skin cancer. Sunburn not only causes discomfort to the skin, but also causes long-term skin damage and pigmentation; at the same time, it will destroy the collagen and elastic fibers in the skin, causing the skin to sag, increase wrinkles, lose elasticity, etc., making the skin look aged. In order to protect the skin from the harm of ultraviolet rays, a series of sun protection measures need to be taken, such as using sunscreen products.

[0003] Sunscreen products protect the skin from damage caused by ultraviolet radiation. Although sunscreen products are very important for protecting the skin from ultraviolet damage, they also have some disadvantages. Although chemical sunscreen products can provide ultraviolet protection, their texture may be greasy, giving users a heavy greasy feeling, and sometimes even leaving white marks on clothing, causing embarrassment; some ingredients with high sun protection in chemical sunscreens, such as para-aminobenzoate (PABA) and its derivatives, cinnamate, etc., are easy to irritate sensitive skin, causing redness, local skin hotness and other discomfort or allergic reactions. There are also reports that some ingredients in chemical sunscreens, such as 4-MBC, may interfere with the endocrine system. Although this ingredient has not been banned in some areas, it has attracted the attention of consumers and researchers; some ingredients, such as oxybenzone and octyl methoxycinnamate, may also have negative effects on marine life, especially in coral reef areas; in addition, chemical sunscreens take some time to be absorbed by the skin and take effect, and may need to be reapplied frequently under strong sunlight, which increases the inconvenience of use.

[0004] Natural sunscreens and enhancers selected from plants have become a research hotspot in recent years because they are natural, low in allergenicity, and have multiple functions such as moisturizing, anti-oxidation, and whitening. They have been added to existing formulas to reduce the use of traditional sunscreens. Summary of the invention

[0005] The purpose of the present invention is to provide a sunscreen composition containing plant sources and a preparation method and application thereof. The sunscreen composition has obvious synergistic sunscreen effect and can resist skin oxidative damage, skin aging, soothe sun-exposed skin, repair and reduce redness of the skin.

[0006] One aspect of the present invention also provides a sunscreen composition, which comprises the following ingredients by mass fraction: Terminalia chebula fruit extract: 0.005-0.4%, Green tea freeze-dried powder: 0.005~0.44%, Water-based sunscreen: 0.5-4.5%, Oily sunscreen: 8-20%, Emulsifier: 1-6%, Remaining amount of water.

[0007] Furthermore, the content of the terminalia chebula is 0.08-0.22%, and the content of the green tea freeze-dried powder is 0.03-0.42%.

[0008] Furthermore, the aqueous sunscreen is selected from one or both of phenylbenzimidazole sulfonic acid and disodium phenyl dibenzimidazole tetrasulfonate.

[0009] Furthermore, the content of phenylbenzimidazole sulfonic acid is 1.3% to 2%, and the content of disodium phenyl dibenzimidazole tetrasulfonate is 0 to 1.5%.

[0010] Furthermore, the oily sunscreen is one or more of homosalate, butyl methoxydibenzoylmethane, octocrylene, ethylhexyl methoxycinnamate, ethylhexyl triazone, diethylaminohydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine.

[0011] Furthermore, the oily sunscreen is selected from a mixture of homosalate, butyl methoxydibenzoylmethane and octocrylene, wherein the content of the homosalate is 8-10%, the content of the butyl methoxydibenzoylmethane is 2-4%, and the content of the octocrylene is 3-5%.

[0012] Furthermore, the oily sunscreen is selected from a mixture of ethylhexyl methoxycinnamate, ethylhexyl triazone, diethylaminohydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine, wherein the content of ethylhexyl methoxycinnamate is 7-9%, the content of ethylhexyl triazone is 0.5-2%, the content of diethylaminohydroxybenzoyl hexyl benzoate is 2-4%, and the content of bis-ethylhexyloxyphenol methoxyphenyl triazine is 0.5-2%.

[0013] The emulsifier comprises an aqueous emulsifier and an oil phase emulsifier, wherein the aqueous emulsifier is potassium cetyl phosphate, and the oil phase emulsifier is C14-22 alcohol / C12-20 alkyl glucoside, and further, the content of potassium cetyl phosphate is 0.1-0.3%, and the content of C14-22 alcohol / C12-20 alkyl glucoside is 3-4%.

[0014] Furthermore, the sunscreen composition also contains a moisturizer, the content of the moisturizer is 0.1-10%, and the moisturizer is selected from one or more of polyethylene glycol, glycerol, 1,3-butylene glycol, pentylene glycol, 1,3-propylene glycol, sorbitol, maltitol, hyaluronic acid, cleaved collagen, l-pyrrolidone carboxylate, short-chain soluble collagen, diglycerol (EO) PO ((ethylene oxide) propylene oxide) adduct, trehalose, erythritol, and POE / POP random copolymer methyl ether.

[0015] Furthermore, the sunscreen composition further comprises an emollient, the content of the emollient is 4-15%, and the emollient is selected from one or more of diisopropyl sebacate and butyloctanol salicylate.

[0016] Furthermore, the sunscreen composition further comprises a thickener, the content of the thickener is 0.4-0.7%, and the thickener is hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer / polysorbate-60 / sorbitan isostearate.

[0017] Furthermore, the sunscreen composition further comprises a pH regulator, and the pH regulator is selected from one or more of sodium lactate, sodium citrate, sodium succinate, sodium hydroxide, potassium hydroxide, arginine, triethanolamine, and aminomethyl propanol.

[0018] Furthermore, the terminalia chebula fruit extract is prepared by the following method; Extracting the terminalia chebula fruit powder with water to obtain a filter residue and a filtrate, extracting the filter residue with water again, and then combining the filtrates obtained from the two water extractions; centrifuging the obtained filtrate, filtering the filtrate again, and finally freeze-drying the obtained filtrate to obtain the terminalia chebula fruit extract; The terminalia chebula fruit powder can be obtained by crushing dry terminalia chebula fruits from the Pan-Himalayan region of Tibet Autonomous Region, China and passing through a 20-mesh sieve.

[0019] The solid-liquid ratio during the water extraction is 1:(10-100), for example 1:40; The water extraction temperature is preferably 70-100°C, for example 80°C; The water extraction time is preferably 3 to 9 hours, for example 5 hours; The centrifugal conditions are preferably 5000-15000 rpm, 0.5-2 h, for example: 10000 rpm, 1 h; The freeze drying conditions shown are preferably -100~-30°C, time: 2 to 8 days, for example: -80°C, 5 days; The terminalia chebula fruit extract of the present invention contains 30% to 40% of tannins, where % is the percentage of the mass of tannins to the total mass of the terminalia chebula fruit extract.

[0020] The green tea freeze-dried powder described in the present invention is Himalayan green tea ultra-low temperature cold-extracted freeze-dried powder, which is an active ingredient extracted from green tea in the Himalayan region of Tibet Autonomous Region, China. The preparation method of the Himalayan green tea ultra-low temperature cold-extracted freeze-dried powder comprises the following steps: after the Himalayan green tea raw material is crushed, water is added for extraction, and a crude extract and a filter residue are obtained by filtering, and the filter residue is subjected to water extraction again, and the two water extractions are combined to obtain a filtrate, and the obtained filtrate is the Himalayan green tea extract, and then freeze-dried to obtain the Himalayan green tea ultra-low temperature cold-extracted freeze-dried powder.

[0021] The tea raw material is, for example, tea raw material from the Pan-Himalayan region, and the particle size after crushing is 0.3v0.6cm.

[0022] The solid-liquid ratio during the water extraction is 1:(9-11), for example 1:10; The water extraction temperature is preferably 70-100°C, for example 85°C; The water extraction time is preferably 0.5 to 3 hours, such as 1 hour.

[0023] The freeze-drying conditions shown are preferably -30 to -10°C for 2 to 8 days, for example, -20°C for 5 days.

[0024] The Himalayan green tea freeze-dried powder of the present invention contains 15-60% of total polyphenols, where % is the percentage of the mass of total polyphenols to the total mass of the Himalayan green tea ultra-low temperature cold-extracted freeze-dried powder.

[0025] Another object of the present invention is to provide a method for preparing a sunscreen product formulation containing the composition, wherein the method comprises the following steps: i) Mix water, water-based sunscreen, thickener, moisturizer and aqueous emulsifier, stir to dissolve evenly, and heat to 80-85°C; ii) Mix the oily sunscreen, emollient and oil phase emulsifier, stir and dissolve evenly, and heat to 80-85°C; iii) pumping the material obtained in step i) into a reaction container, stirring and mixing evenly, pumping the material in step ii) into the reaction container, stirring, high-speed homogenization and emulsification, stirring and cooling to 40-50° C.; IV) Add the dissolved Terminalia chebula fruit extract and the freeze-dried green tea powder and stir to mix evenly.

[0026] Beneficial effects: 1. The sunscreen composition disclosed in the present invention can significantly improve the SPF value and PA value of the water-in-oil sunscreen system and reduce the ability of ultraviolet rays to damage the skin.

[0027] 2. The sunscreen composition disclosed in the present invention can also reduce the amount of chemical sunscreen agents used while ensuring the sunscreen efficiency, thereby improving the stability of the preparation.

[0028] 3. The sunscreen composition disclosed in the present invention can improve the mildness of the product, improve the greasy skin feel commonly found in sunscreen preparations, and make the skin feel more refreshing.

[0029] 4. The sunscreen composition disclosed in the present invention can simultaneously protect the skin from oxidative damage, skin aging, inhibit inflammation, calm and soothe the skin after sun exposure, and repair and reduce redness of the skin. DETAILED DESCRIPTION

[0030] The following examples illustrate methods and results according to the disclosed subject matter. These examples are not intended to be all inclusive of all aspects of the subject matter disclosed herein, but rather to illustrate representative methods, compositions, and results. These examples are not intended to exclude equivalents and variations of the invention that are obvious to those skilled in the art.

[0031] 1. Preparation of raw materials of Terminalia chebula fruit extract and green tea freeze-dried powder 1. Preparation of Terminalia chebula fruit extract: Take 1 part of terminalia chebula fruit extract and 30 parts of water and extract at 70°C for 7 hours, extract terminalia chebula fruit powder to obtain filter residue and filtrate, add 40 parts of water to the filter residue again and extract at 80°C for 4 hours, then combine the filtrates obtained by the two water extractions; finally, the obtained filtrate is centrifuged at 5000rpm for 1 hour, and the filtrate is filtered again to obtain the filtrate, and the obtained filtrate is dried at -80°C for 3 days, and freeze-dried to obtain terminalia chebula fruit extract. According to the test, the terminalia chebula fruit extract contains 36% tannin.

[0032] 2. Preparation of green tea freeze-dried powder: After the Himalayan green tea is crushed, water is added for extraction, and a crude extract and a filter residue are obtained after filtration. The filter residue is added with 6 times water for extraction at 85°C for 1 hour, and the two water extractions are combined to obtain a filtrate, which is then dried at -20°C for 33 days to obtain the green tea freeze-dried powder. After testing, the obtained Himalayan green tea freeze-dried powder contains 45% of total polyphenols.

[0033] 2. Preparation of sunscreen composition The following examples use other raw material sources: Hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer / polysorbate 60 / sorbitan isostearate was obtained from SEPPIC SA, model SEPINOV EMT 10.

[0034] Potassium cetyl phosphate was obtained from DSM Nutritional Products under the brand name AMPHISOL® K.

[0035] The C14-22 alcohol / C12-20 alkyl glucoside was obtained from SEPPIC SA under the model MONTANOV L.

[0036] Sodium hydroxide was obtained from Xilong Scientific Co., Ltd., model number was Sodium Hydroxide AR.

[0037] 1,3-Propanediol was obtained from DuPont Tate & Lyle Bio Products Company, LLC under the name Zemea®Select Propanediol. Disodium EDTA was obtained from Nouryon Chemicals (Ningbo) Co., Ltd. under the name Dissolvine Na2.

[0038] Parahydroxyacetophenone was obtained from SymSave Flavors & Fragrances (Nantong) Co., Ltd., model number SymSave® H (672096).

[0039] Diisopropyl sebacate is from NIPPON SURFACTANT INDUSTRIES CO., LTD., Lubrizol Advanced Materials, Inc., NIKKOL DIS, SCHERCEMOL™ DIS ESTER.

[0040] Polydimethylsiloxane was from Jiangxi Lanxing Xinghuo Silicone Co., Ltd., MIRASIL DM 5.

[0041] Phenoxyethanol comes from NEOLONE™ PH 100 preservative and KL-EPH-10 from Danisco Biotech (Shanghai) Co., Ltd.

[0042] Ethylhexyl methoxycinnamate, from BASF (China) Co., Ltd., model Uvinul® MC 80; Butyloctanol salicylate, from Hallstar Beauty and Personal Care Solutions Company, model number HALLBRITE BHB; Ethylhexyl triazone, from BASF (China) Co., Ltd., Huanggang Meifeng Chemical Technology Co., Ltd., model Uvinul® T150; Diethylaminohydroxybenzoyl hexyl benzoate, from BASF (China) Co., Ltd., model Uvinul® A Plus Granular; Bis-ethylhexyloxyphenol methoxyphenyl triazine, from BASF (China) Co., Ltd., Huanggang Meifeng Chemical Technology Co., Ltd., model Tinosorb® S, Mfsorb® 509H (version number 1.0); Octocrylene, from Dezhixin Flavors & Fragrances (Nantong) Co., Ltd., model number Neo Heliopan® 303; Butyl methoxydibenzoylmethane, from DSM Nutritional Products, model PARSOL® 1789; Homosalate, from Dezhixin Flavors & Fragrances (Nantong) Co., Ltd., model Neo Heliopan® HMS; Phenylbenzimidazole sulfonic acid, from Dezhixin Flavors & Fragrances (Nantong) Co., Ltd., model Neo Heliopan® Hydro; Disodium phenyl dibenzimidazole tetrasulfonate, from Dezhixin Flavors & Fragrances (Nantong) Co., Ltd., model NeoHeliopan® AP; Decyl glucoside, methylene bis-benzotriazolyl tetramethylbutylphenol, water, propylene glycol, xanthan gum, from BASF (China) Co., Ltd., model Tinosorb® M.

[0043] The terminalia chebula fruit extract and green tea freeze-dried powder are prepared from the above step (i).

[0044] Example 1: Preparation of sunscreen composition i) Mix water, 1.5 parts of phenylbenzimidazole sulfonic acid, 0.5 parts of hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer / polysorbate-60 / sorbitan isostearate, 5 parts of 1,3-propylene glycol, 0.2 parts of potassium cetyl phosphate, 0.05 parts of disodium EDTA, 0.3 parts of p-hydroxyacetophenone, and 0.26 parts of sodium hydroxide, stir to dissolve evenly, and heat to 85°C; ii) Mix 9 parts of homosalate, 3 parts of butyl methoxydibenzoylmethane, 4 parts of octocrylene, 8 parts of diisopropyl sebacate, 3.5 parts of C14-22 alcohol / C12-20 alkyl glucoside, 3 parts of polydimethylsiloxane, and 0.4 parts of phenoxyethanol, stir and dissolve evenly, and heat to 80°C; iii) The material obtained in step i) is pumped into a reaction container, stirred and mixed evenly, and the material in step ii) is pumped into the reaction container, stirred, and high-speed homogenized and emulsified for 5 minutes, and stirred and cooled to 50° C.

[0045] IV) Add 0.2 parts of the chebula fruit extract prepared in the above step and 0.2 parts of the green tea freeze-dried powder and stir and mix them evenly. The chebula fruit extract and green tea extract prepared by the above method have good solubility and can be well added to the sunscreen formula.

[0046] Example 2: Preparation of sunscreen composition The types and addition amounts of other raw materials and the preparation method are the same as those in Example 1, except that the addition amount of green tea freeze-dried powder is modified to 0.05 parts.

[0047] Example 3: Preparation of sunscreen composition The types and addition amounts of other raw materials and the preparation method are the same as those in Example 1, except that the addition amount of the Terminalia chebula fruit extract is modified to 0.1 parts.

[0048] Example 4: Preparation of sunscreen composition The types and addition amounts of other raw materials and the preparation method are the same as those in Example 3, except that the addition amount of green tea freeze-dried powder is modified to 0.4 parts.

[0049] Example 5: Preparation of sunscreen composition The types and addition amounts of other raw materials and the preparation method are the same as those in Example 1, except that 0.1 part of Terminalia chebula fruit extract and 0.1 part of green tea freeze-dried powder are added, and the aqueous sunscreen agent is 1.5 parts of phenylbenzimidazole sulfonic acid and 1 part of disodium phenyl dibenzimidazole tetrasulfonate.

[0050] Example 6: Preparation of sunscreen composition The types and addition amounts of other raw materials and the preparation method are the same as those in Example 1, except that 0.1 parts of Terminalia chebula fruit extract and 0.1 parts of green tea freeze-dried powder are added, and the oily sunscreen is 4 parts of octocrylene, 8 parts of ethylhexyl methoxycinnamate, 1 part of ethylhexyl triazone, 3 parts of diethylaminohydroxybenzoyl hexyl benzoate, and 1 part of bis-ethylhexyloxyphenol methoxyphenyl triazine.

[0051] Example 7: Preparation of sunscreen composition The types and addition amounts of other raw materials and the preparation method are the same as those in Example 1, except that 0.1 parts of Terminalia chebula fruit extract and 0.1 parts of green tea freeze-dried powder are added, 1.5 parts of phenylbenzimidazole sulfonic acid and 1 part of disodium phenyl dibenzimidazole tetrasulfonate are aqueous sunscreens, 4 parts of octocrylene are oily sunscreens, 8 parts of ethylhexyl methoxycinnamate, 1 part of ethylhexyl triazone, 3 parts of diethylaminohydroxybenzoyl hexyl benzoate, and 1 part of bis-ethylhexyloxyphenol methoxyphenyl triazine are used as the oily sunscreen.

[0052] The formula and content of Examples 1-7 are shown in Table 1.

[0053] Table 1 Sunscreen composition formula of Examples 1-7

[0054] Comparative Example 1. Preparation of sunscreen composition Comparative Example 1: The types and addition amounts of other raw materials and the preparation method are the same as those in Example 1, except that the terminalia chebula fruit extract and green tea freeze-dried powder are not added.

[0055] Comparative Example 2. Preparation of sunscreen composition Comparative Example 2: The other raw material types and addition amounts, and the preparation method are the same as those in Example 5, except that no water-based sunscreen agent is added.

[0056] Comparative Example 3. Preparation of Sunscreen Composition Comparative Example 3: The other raw material types and addition amounts, and the preparation method are the same as those in Example 5, except that the terminalia chebula fruit extract and green tea freeze-dried powder are not added.

[0057] Comparative Example 4. Preparation of sunscreen composition Comparative Example 4: The other raw material types and addition amounts, and the preparation method are the same as those in Example 6, except that the terminalia chebula fruit extract, green tea freeze-dried powder and aqueous sunscreen are not added.

[0058] Comparative Example 5. Preparation of sunscreen composition Comparative Example 5: The other raw material types and addition amounts are the same as those of Example 6, except that the terminalia chebula fruit extract and green tea freeze-dried powder are not added, and 2 parts of methylene bisbenzotriazolyl tetramethylbutylphenol are used as the aqueous sunscreen.

[0059] Comparative Example 6. Preparation of sunscreen composition The other raw material types and addition amounts of Comparative Example 6 and the preparation method are the same as those of Example 6, except that no water-based sunscreen agent is added.

[0060] Comparative Example 7. Preparation of sunscreen composition Comparative Example 7: The other raw material types and addition amounts, and the preparation method are the same as those of Example 6, the only difference being that 2 parts of methylene bisbenzotriazolyl tetramethylbutylphenol are used in the aqueous sunscreen.

[0061] Comparative Example 8. Preparation of sunscreen composition The preparation method of Comparative Example 8 is the same as that of Example 6, except that the terminalia chebula fruit extract and green tea freeze-dried powder are not added. The preparation method of Comparative Example 9 is the same as that of Example 7, except that the terminalia chebula fruit extract and green tea freeze-dried powder are not added.

[0062] Comparative Example 10 Preparation of Sunscreen Composition Add 6.6 parts of phenylbenzimidazole sulfonic acid, 2 parts of disodium phenyl dibenzimidazole tetrasulfonate and the balance of water to prepare an aqueous sunscreen composition.

[0063] Comparative Example 11 Preparation of Sunscreen Composition Add 6.6 parts of phenylbenzimidazole sulfonic acid, 2 parts of disodium phenyl dibenzimidazole tetrasulfonate, 0.1 parts of Terminalia chebula fruit extract and 0.1 parts of green tea freeze-dried powder as aqueous sunscreen and the remainder is water to prepare an aqueous sunscreen composition.

[0064] Comparative Example 12 Preparation of Sunscreen Composition The other ingredients are the same as those in Example 5, without adding any sunscreen, and a mixture of 0.1 and 0.1 of Terminalia chebula fruit extract + green tea freeze-dried powder and deionized water.

[0065] Comparative Example 13 Preparation of Sunscreen Composition The other ingredients are the same as those in Example 1, without adding any sunscreen, and a mixture of 0.2 and 0.2 of Terminalia chebula fruit extract + green tea freeze-dried powder and deionized water.

[0066] Comparative Example 14, The same as Example 2, except that 0.2 parts of Terminalia chebula fruit extract was added.

[0067] Comparative Example 15, Same as Example 4, except that 0.4 portions of green tea freeze-dried powder were added.

[0068] The formula and content of comparative examples 1-11 are shown in Table 2 Table 2 Comparative Examples 1-11 Sunscreen Composition Formula

[0069] Three: Sunscreen effect test 1) SPF and PA value testing The following properties of the sunscreen products provided in Examples 1-7 and 1-11 were tested: UV-2000S is a stable top-level testing equipment that can quickly detect the diffuse transmittance of product samples to light in the wavelength range of 280nm-410nm. The in vitro technology is used for determination according to the following scheme: Use a pipette to transfer the sample prepared in Table 1-2, and evenly spot (0.027 6±0.000 3) g of the sample on a PMMA plate (5 cm×5 cm) (purchased from SCHON BERG Gm bH&Co .KG, Hamburg / Germany). Use an index finger wearing a disposable finger cot to evenly spread the sample, and dry it in a dark place under constant temperature and humidity conditions for 20-30 min. Use UV-2000s to test the SPF value and PA value of the sample. Among them, the SPF values ​​and PA values ​​detected in Examples 1-5 and Comparative Examples 1-3 are shown in Table 3.

[0070] Table 3 SPF values ​​and PA values ​​detected in Examples 1-5 and Comparative Examples 1-3

[0071] From the results of Comparative Examples 12 and 13 in Table 3, it can be seen that the SPF and PA values ​​of the Terminalia chebula fruit extract and the freeze-dried tea powder are not obvious under the same test conditions.

[0072] Compared with Example 1 and Comparative Example 1, Example 5 and Comparative Example 3, the addition of the terminalia chebula fruit extract and the green tea freeze-dried powder can significantly improve the SPF value and PA value of the sunscreen composition.

[0073] Compared with Comparative Example 4, Example 2 can improve the SPF value and PA value of the sunscreen composition by adding a small amount of green tea freeze-dried powder. Compared with Comparative Example 15, Example 4 can also significantly improve the SPF value and PA value of the sunscreen composition by adding a small amount of Terminalia chebula fruit extract, but the effects are worse than the case where both are added at the same time.

[0074] Compared with Comparative Example 2, Example 5 requires adding both water-based sunscreen and oil-based sunscreen to the system to significantly improve the SPF value and PA value of the system.

[0075] Therefore, in Examples 1-5, the chebula fruit extract is in the range of 0.1-0.2 parts and the green tea freeze-dried powder is in the range of 0.05-0.4 parts, and the aqueous sunscreens phenylbenzimidazole sulfonic acid, phenylbenzimidazole sulfonic acid, and the oily sunscreens homosalate, butyl methoxydibenzoylmethane, and octocrylene can significantly improve the SPF value and PA value of the sunscreen composition.

[0076] The SPF values ​​and PA values ​​detected in Example 6 and Comparative Examples 4-11 are shown in Table 4: Table 4 SPF values ​​and PA values ​​detected in Example 6 and Comparative Examples 4-11

[0077] As shown in Table 4, compared with Example 6, in Comparative Example 4, no aqueous sunscreen, chebula fruit extract, or green tea freeze-dried powder was added, and the SPF value and PA value were relatively low. After adding the aqueous sunscreen methylene bisbenzotriazolyl tetramethylbutylphenol to Comparative Example 5, although the SPF value and PA value could be improved, the improvement effect was not obvious. Comparative Example 6 added chebula fruit and green tea freeze-dried powder, but did not add an aqueous sunscreen, and the improvement of the overall SPF value and PA value of the sunscreen composition was not obvious. Comparative Example 7 added green tea freeze-dried powder and chebula fruit extract, and matched with the aqueous sunscreen methylene bisbenzotriazolyl tetramethylbutylphenol, and the improvement of the sunscreen effect of the sunscreen composition was not obvious. This shows that in order to improve the sunscreen effect, the sunscreen composition has certain requirements on the type of aqueous sunscreen.

[0078] Compared with Example 7, in Comparative Examples 8 and 9, no terminalia chebula fruit extract and green tea freeze-dried powder were added, and the SPF value and PA value of the overall sunscreen composition were not significantly improved. In Comparative Examples 10 and 11, no water-based sunscreen or oil-based sunscreen was added, and the SPF value and PA value of the system were also extremely low.

[0079] 4. Skin feel test Through human experiments, the sunscreen products of Example 1 and Comparative Example 3 with the addition of terminalia chebula extract and tea freeze-dried powder and the sunscreen products without terminalia chebula extract and tea freeze-dried powder were tested. After being applied to people with sensitive skin, they were left in the sun for 2 hours. The differences in skin condition after use were observed for people with sensitive skin, and the following skin condition indicators were selected, such as the skin erythema index, and the subjective feelings of the user (such as whether it is refreshing, whether there are white marks, burning, stinging, itching and tightness, etc.). The changes in the skin condition of 5 volunteers with sensitive skin after using two different sunscreen products: to further evaluate the sunscreen effect of the technical solution disclosed in the present invention, the experimental results are shown in Table 5 Table 5 Sunscreen results of Example 1 and Comparative Example 3 Skin feel characterization

[0080] From the data in the above table, it can be seen that for volunteers, the sunscreen product with the addition of the chebula and tea freeze-dried composition has improved skin erythema, and the subjective feeling of freshness is also significantly enhanced. This shows that the sunscreen composition of this embodiment has the effect of soothing sensitive skin, can reduce skin discomfort, and improve skin comfort and reduce greasy feeling.

[0081] The above embodiments are only used to illustrate the detailed methods of the present invention. The present invention is not limited to the above detailed methods, that is, it does not mean that the present invention must rely on the above detailed methods to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A sunscreen composition, characterized in that: In terms of mass fraction, it contains the following ingredients: Terminalia chebula fruit extract: 0.005-0.4%, Green tea freeze-dried powder: 0.005~0.44%, Water-based sunscreen: 0.5-4.5%, Oily sunscreen: 8-20%, Emulsifier: 1-6%, Remaining amount of water.

2. The sunscreen composition according to claim 1, characterized in that The content of the terminalia chebula fruit extract is 0.08-0.22%, and the content of the green tea freeze-dried powder is 0.03-0.42%.

3. The sunscreen composition according to claims 1-2, characterized in that: The aqueous sunscreen agent is one or both of phenylbenzimidazole sulfonic acid and disodium phenyl dibenzimidazole tetrasulfonate, the content of the phenylbenzimidazole sulfonic acid is 1.3% to 2%, and the content of the disodium phenyl dibenzimidazole tetrasulfonate is 0 to 1.5%.

4. The sunscreen composition according to claim 3, characterized in that The oily sunscreen is one or more of homosalate, butyl methoxydibenzoylmethane, octocrylene, ethylhexyl methoxycinnamate, ethylhexyl triazone, diethylaminohydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine.

5. The sunscreen composition according to claim 4, characterized in that The oily sunscreen is selected from a mixture of homosalate, butyl methoxydibenzoylmethane, and octocrylene, or a mixture of ethylhexyl methoxycinnamate, ethylhexyl triazone, diethylaminohydroxybenzoyl hexyl benzoate, and bis-ethylhexyloxyphenol methoxyphenyl triazine, wherein the content of homosalate is 8-10%, the content of butyl methoxydibenzoylmethane is 2-4%, the content of octocrylene is 3-5%, or the content of ethylhexyl methoxycinnamate is 7-9%, the content of ethylhexyl triazone is 0.5-2%, the content of diethylaminohydroxybenzoyl hexyl benzoate is 2-4%, and the content of bis-ethylhexyloxyphenol methoxyphenyl triazine is 0.5-2%.

6. The sunscreen composition according to claim 4, characterized in that The emulsifier is selected from the aqueous phase emulsifier potassium cetyl phosphate, and the oil phase emulsifier is selected from C14-22 alcohol / C12-20 alkyl glucoside, wherein the content of potassium cetyl phosphate is 0.1-0.3%, and the content of C14-22 alcohol / C12-20 alkyl glucoside is 3-4%.

7. The sunscreen composition according to claim 6, characterized in that The sunscreen composition further comprises a moisturizer, an emollient and a thickener, wherein the moisturizer content is 0.1-10%, and is selected from one or more of polyethylene glycol, glycerol, 1,3-butylene glycol, pentylene glycol, 1,3-propylene glycol, sorbitol, maltitol, hyaluronic acid, cleaved collagen, l-pyrrolidone carboxylate, short-chain soluble collagen, diglycerol (EO) PO ((ethylene oxide) propylene oxide) adduct, trehalose, erythritol, and POE / POP random copolymer methyl ether; the emollient content is 4-15%, and is selected from one or more of diisopropyl sebacate and butyloctanol salicylate; the thickener content is 0.4-0.7%, and is selected from hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer / polysorbate-60 / sorbitan isostearate.

8. The sunscreen composition according to claim 1, characterized in that The terminalia chebula fruit extract is prepared by the following method: extracting terminalia chebula fruit powder with water to obtain a filter residue and a filtrate, extracting the filter residue with water again, and then combining the filtrates obtained by the two water extractions; centrifuging the obtained filtrate, filtering the filtrate again, and finally freeze-drying the obtained filtrate to obtain the terminalia chebula fruit extract; The terminalia chebula fruit powder can be obtained by crushing dry terminalia chebula fruits from the Pan-Himalayan region of Tibet Autonomous Region, China and passing through a 20-mesh sieve; The solid-liquid ratio during the water extraction is 1:(10-100), for example 1:40; The water extraction temperature is preferably 70-100°C, for example 80°C; The water extraction time is preferably 3 to 9 hours, for example 5 hours; The centrifugal conditions are preferably 5000-15000 rpm, 0.5-2 h, for example: 10000 rpm, 1 h; The freeze drying conditions shown are preferably -100~-30°C, time: 2 to 8 days, for example: -80°C, 5 days; The terminalia chebula fruit extract contains 30% to 40% of tannins, where % is the percentage of the mass of tannins to the total mass of the terminalia chebula fruit extract.

9. The sunscreen composition according to claim 1, characterized in that The green tea freeze-dried powder is a Pan-Himalayan green tea ultra-low temperature cold-extracted freeze-dried powder, and the preparation method comprises the following steps: crushing the Pan-Himalayan green tea raw material, adding water to extract, filtering to obtain a crude extract and a filter residue, extracting the filter residue with water again, combining the two water extractions to obtain a filtrate, and the obtained filtrate is the Himalayan green tea extract, and then freeze-drying, that is, the Pan-Himalayan green tea ultra-low temperature cold-extracted freeze-dried powder; The tea raw material is, for example, tea raw material from the Pan-Himalayan region, and the particle size after crushing is 0.3-0.6 cm; The solid-liquid ratio during the water extraction is 1:(9-11), for example 1:10; The water extraction temperature is preferably 70-100°C, for example 85°C; The water extraction time is preferably 0.5 to 3 hours, for example 1 hour; The freeze drying conditions shown are preferably -30 to -10°C for 2 to 8 days, for example, -20°C for 5 days; The Himalayan green tea freeze-dried powder contains 15-60% of total polyphenols, where % is the percentage of the mass of total polyphenols to the total mass of the Himalayan green tea ultra-low temperature cold-extracted freeze-dried powder.

10. A method for preparing the sunscreen composition according to claims 1-9, characterized in that: The method comprises the following steps: i) Mix water, water-based sunscreen, thickener, moisturizer and aqueous emulsifier, stir to dissolve evenly, and heat to 80-85°C; ii) Mix the oily sunscreen, emollient and oil phase emulsifier, stir and dissolve evenly, and heat to 80-85°C; iii) pumping the material obtained in step i) into a reaction container, stirring and mixing evenly, pumping the material in step ii) into the reaction container, stirring, high-speed homogenization and emulsification, stirring and cooling to 40-50° C.; IV) Add the dissolved Terminalia chebula fruit extract and the freeze-dried green tea powder and stir to mix evenly.

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