A plant sunscreen composition suitable for sensitive skin and its application

Abstract

The present invention discloses a plant sunscreen composition suitable for sensitive skin and its application, belonging to the technical field of cosmetics; the plant sunscreen composition includes a plant synergistic composition, a physical sunscreen and a chemical sunscreen; the plant synergistic composition includes a Curcuma aromatica extract, a cardamom extract and a kudzu root extract. In the plant sunscreen composition provided by the present invention, a plant synergistic composition with a compounding effect between components is introduced on the basis of adding a physical sunscreen and a chemical sunscreen, so as to achieve an excellent effect of enhancing the physical sunscreen and chemical sunscreen effects, and also has the effect of after-sun repair; when applied to the preparation of subsequent sunscreen products, the obtained sunscreen product has a higher SPF value and PFA value, and is mild and non-irritating, and can be suitable for sensitive skin. At the same time, the preparation method of the plant sunscreen composition and the sunscreen product provided by the present invention is simple and suitable for actual production.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics, and in particular relates to a plant sunscreen composition suitable for sensitive skin and application thereof. Background Art

[0002] Sunscreen products are made by adding sunscreens that reflect or absorb ultraviolet radiation to reduce the damage to the skin caused by ultraviolet rays. Most current sunscreen products use a combination of physical sunscreen and chemical sunscreen; physical sunscreen, also known as barrier sunscreen, protects the skin by reflecting ultraviolet rays; physical sunscreens generally include zinc oxide, titanium dioxide, etc.; chemical sunscreen protects the skin by absorbing ultraviolet rays.

[0003] In the prior art, if you want to achieve a sufficient sunscreen effect, you need to add a large amount of physical and chemical sunscreens; however, physical sunscreens are generally solid and insoluble in water, so a large amount of high-polarity oils need to be added to dissolve, which makes the skin feel greasy, and the skin is not breathable after application, which leads to clogged pores; chemical sunscreens have a small molecular weight and can penetrate deep into the skin, which is potentially harmful to the skin, and may cause skin problems such as free radicals and photosensitivity, and their stability is insufficient, requiring continuous reapplication. In addition, the addition of a large amount of physical and chemical sunscreens will also affect the secretion of sebaceous glands and sweat glands, causing skin allergies and discomfort during use, and is not suitable for people with sensitive skin; at the same time, the addition of too much physical and chemical sunscreens is also highly irritating to the skin. Summary of the invention

[0004] The object of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a plant sunscreen composition suitable for sensitive skin, which has strong absorption capacity for UVA and UVB, strong scavenging capacity for free radicals, strong inhibition capacity for tyrosinase, and is non-greasy and non-irritating after use, and its application.

[0005] To achieve the above object, in a first aspect of the present invention, the present invention provides a plant sunscreen composition suitable for sensitive skin, the plant sunscreen composition comprising a plant synergistic composition, a physical sunscreen and a chemical sunscreen;

[0006] The plant synergistic composition comprises Curcuma aromatica extract, Alpinia oxyphylla extract and Pueraria root extract.

[0007] In the plant sunscreen composition suitable for sensitive skin provided by the present invention, a plant synergistic composition is introduced on the basis of adding a physical sunscreen and a chemical sunscreen, wherein the Curcuma Radix extract, the cardamom extract and the kudzu root extract in the plant synergistic composition can cooperate with each other to achieve an excellent effect of enhancing the sunscreen effect. At the same time, due to the introduction of the plant synergistic composition, on the basis of achieving the same absorption effect on UVA and UVB, the addition amount of the physical sunscreen and the chemical sunscreen can be significantly reduced, thereby reducing the greasy skin feeling and irritation problems caused by the addition of the physical sunscreen and the chemical sunscreen; and the introduction of the plant synergist of the present invention can also make the overall sunscreen composition have certain effects of scavenging free radicals and inhibiting tyrosinase, thereby achieving the effect of post-sun repair.

[0008] Specifically, the chalcone ingredients such as cardamomum contained in cardamom extract can effectively absorb UVA; Pueraria extract can effectively absorb UVB; in addition, the galangin in cardamom extract and the curcumin in Curcuma aromatica extract have obvious antioxidant and free radical scavenging effects, which can effectively resist the damage of free radicals to the skin and enhance the skin's defense. They also have a certain tyrosinase activity inhibition rate and have a certain whitening effect; in addition, the triterpenoid components contained in cardamom extract and Curcuma aromatica extract can strengthen the skin barrier, inhibit the occurrence of harmful inflammation, and achieve the effect of post-sun repair.

[0009] As a preferred embodiment of the plant sunscreen composition of the present invention, in the plant synergistic composition, the mass ratio of Curcuma aromatica extract, Alpinia oxyphylla extract and Pueraria root extract is 1:(1-3):(1-3).

[0010] As a preferred embodiment of the plant sunscreen composition of the present invention, in the plant synergistic composition, the mass ratio of Curcuma aromatica extract, Alpinia oxyphylla extract and Pueraria root extract is 1:2:2.

[0011] The present invention finds that the mass ratio of the Curcuma aromatica extract, the Alpinia oxyphylla extract and the Pueraria root extract in the plant synergistic composition will affect the comprehensive performance of the product. When the mass ratio of the Curcuma aromatica extract, the Alpinia oxyphylla extract and the Pueraria root extract is further selected to be 1:(1-3):(1-3), especially 1:2:2, the obtained product has a stronger absorption capacity for UVA and UVB, and a better inhibitory effect on free radicals and tyrosinase; and when applied to the preparation of sunscreen products, the obtained sunscreen products have less irritation, resulting in a low probability of oily facial skin of users.

[0012] As a preferred embodiment of the plant sunscreen composition of the present invention, the mass percentage of the plant synergistic composition is 20-45% based on the total mass of the plant sunscreen composition.

[0013] As a preferred embodiment of the plant sunscreen composition of the present invention, the mass percentage of the plant synergistic composition is 25-35% based on the total mass of the plant sunscreen composition.

[0014] The present invention has been found that the mass percentage of the plant synergistic composition in the plant sunscreen composition will affect the comprehensive performance of the product. When the mass percentage of the plant synergistic composition is further selected to be 20-45%, especially 25-35%, the anti-ultraviolet ability of the product can be further improved, and a better effect of inhibiting free radicals and tyrosinase can be achieved. When applied to the human body, the occurrence of greasy skin feeling or skin irritation after use can be avoided to a greater extent.

[0015] As a preferred embodiment of the plant sunscreen composition of the present invention, the mass ratio of the plant synergistic composition to the physical sunscreen is 1:(0.6-0.7).

[0016] The present invention has found that when the mass ratio of the plant synergistic composition to the physical sunscreen is further selected to be 1: (0.6-0.7), the greasy feeling during use can be better reduced, the skin permeability is better, and the irritation is lower.

[0017] As a preferred embodiment of the plant sunscreen composition of the present invention, the physical sunscreen comprises at least one of titanium dioxide and zinc oxide;

[0018] And / or, the chemical sunscreen includes at least one of diethylaminohydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, butyl methoxydibenzoylmethane, ethylhexyl salicylate, dimethyl PABA ethylhexyl ester, methylene bisbenzotriazolyl tetramethylbutylphenol, polysilicone-15, diethylhexyl butyramido triazone or ethylhexyl methoxycinnamate.

[0019] As a preferred embodiment of the plant sunscreen composition of the present invention, the physical sunscreen agent is zinc oxide and titanium dioxide, and the mass ratio of zinc oxide to titanium dioxide is 1:(0.5-3);

[0020] And / or, the chemical sunscreen is diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, and ethylhexyl triazone, and the mass ratio of diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, and ethylhexyl methoxycinnamate is (1-1.5):(0.5-1):1:(2-5).

[0021] The present invention has found that the selection of physical sunscreens and chemical sunscreens will affect the comprehensive performance of the product. When the types of physical sunscreens and chemical sunscreens are further selected within the scope of the present invention, the resulting product has better anti-ultraviolet ability, is less irritating to the skin, and produces less oil after use.

[0022] As a preferred embodiment of the plant sunscreen composition of the present invention, at least one of the following (a)-(c) is included:

[0023] (a) The preparation method of the Curcuma aromatica extract comprises the following steps: extracting Curcuma aromatica powder by mixing with an ionic liquid aqueous solution, then centrifuging and filtering, collecting the filtrate, concentrating, and drying to a constant weight to obtain the Curcuma aromatica extract;

[0024] (b) The preparation method of the Alpinia oxyphylla extract comprises the following steps: extracting Alpinia oxyphylla powder by mixing with an ionic liquid aqueous solution, then centrifuging and filtering, collecting the filtrate, concentrating, and drying to a constant weight to obtain the Alpinia oxyphylla extract;

[0025] (c) The method for preparing the kudzu root extract comprises the following steps: extracting kudzu root powder by mixing it with an ionic liquid aqueous solution, then centrifuging and filtering, collecting the filtrate, concentrating it, and drying it to a constant weight to obtain the kudzu root extract.

[0026] As a preferred embodiment of the plant sunscreen composition of the present invention, the ionic liquid is a mixture of betaine, glycerol and propylene glycol.

[0027] Preferably, the mass ratio of betaine, glycerol and propylene glycol is (15-30):(60-90):(0.5-10).

[0028] Preferably, in the ionic liquid aqueous solution, the mass percentage of the ionic liquid is 10-50%.

[0029] Preferably, the solid-liquid ratio of the extraction is (1-10):100.

[0030] Preferably, the extraction time is 30-120 min, and the extraction temperature is 20-30°C.

[0031] The present invention has been found that when the preparation method of the present invention is adopted, not only the extraction rate can be improved, but also the loss of heat-sensitive active ingredients in the plant extract can be reduced, thereby making the compounding effect between the corresponding extracts obtained better and the comprehensive effect of the final product better.

[0032] In the second aspect of the present invention, the method for preparing the plant sunscreen composition of the present invention is: mixing the components evenly to obtain the plant sunscreen composition.

[0033] The preparation method of the plant sunscreen composition provided by the invention is simple and is conducive to practical application.

[0034] In the third aspect of the present invention, the present invention provides a use of the plant sunscreen composition in the preparation of a sunscreen product.

[0035] The present invention has found that the plant sunscreen composition provided by the present invention can be added into sunscreen products as an effective ingredient, thereby achieving the sunscreen products having mild, non-irritating, non-greasy, excellent antioxidant and whitening effects on the basis of achieving excellent sunscreen ability.

[0036] In a fourth aspect of the present invention, the present invention provides a sunscreen product, comprising the plant sunscreen composition of the present invention.

[0037] As a preferred embodiment of the sunscreen product of the present invention, the sunscreen product comprises the following components in percentage by mass: 7-20% plant sunscreen composition, 0.5-10% emollient, 0.1-5% film former, 5-12% humectant, 0.1-0.5% thickener, 0.5-2% preservative, 1-5% emulsifier, and the balance is water.

[0038] As a preferred embodiment of the sunscreen product of the present invention, the film-forming agent includes at least one of trimethylsiloxysilicate and cyclopentasiloxane;

[0039] And / or, the emulsifier includes at least one of polyglyceryl-10 oleate, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, and steareth-21;

[0040] And / or, the moisturizing agent includes at least one of glycerol, 1,3-butylene glycol, and 1,2-pentanediol;

[0041] And / or, the emollient includes at least one of dicaprylyl carbonate and propylene carbonate;

[0042] And / or, the thickener comprises xanthan gum;

[0043] And / or, the preservative includes at least one of p-hydroxyacetophenone and hexylene glycol.

[0044] Preferably, the mass ratio of p-hydroxyacetophenone to hexylene glycol is (1-2):1.

[0045] Preferably, the film-forming agent is trimethylsiloxysilicate and cyclopentasiloxane, and the mass ratio of the trimethylsiloxysilicate to the cyclopentasiloxane is (1-2):1.

[0046] In a fifth aspect of the present invention, the present invention provides a method for preparing a sunscreen product, the preparation method comprising the following steps:

[0047] The chemical sunscreen and emulsifier are mixed, heated and homogenized, and then cooled. Subsequently, a film former, an emollient and a physical sunscreen are added and homogenized. Subsequently, a moisturizer, a thickener and water are added for emulsification. After the emulsification is completed, a plant synergistic composition and a preservative are added and stirred to obtain a sunscreen product.

[0048] Preferably, the preparation method comprises the following steps: mixing a chemical sunscreen and an emulsifier and heating them to 80-90°C for homogenization, cooling them to 40-50°C after homogenization, then adding a film former, an emollient and a physical sunscreen to homogenize into a uniform oil phase, then adding a moisturizer, a thickener and water at 20-30°C for emulsification, and after the emulsification is completed, adding a plant synergistic composition and a preservative and stirring to obtain a sunscreen product.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] In the plant sunscreen composition suitable for sensitive skin provided by the present invention, a plant synergistic composition is introduced on the basis of adding physical sunscreen and chemical sunscreen, wherein the Curcuma Radix extract, cardamom extract and kudzu root extract in the plant synergistic composition can cooperate with each other to achieve excellent enhancement of physical sunscreen and chemical sunscreen effects, and at the same time, due to the introduction of the plant synergistic composition, on the basis of achieving the same absorption effect on UVA and UVB, the addition amount of physical sunscreen and chemical sunscreen can be significantly reduced, thereby reducing the greasy and irritating problems of the skin feel caused by the addition of physical sunscreen and chemical sunscreen; and the introduction of the plant synergist of the present invention can also make the overall sunscreen composition have certain free radical scavenging and tyrosinase inhibition effects, and achieve the effect of after-sun repair; when applied to the preparation of subsequent sunscreen products, the obtained sunscreen product has a higher SPF value and PFA value, and is mild and non-irritating, can be applied to sensitive skin, and also has a good after-sun repair effect. At the same time, the preparation method of the plant sunscreen composition and sunscreen product provided by the present invention is simple and suitable for actual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is the picture of the red area improvement results before and after using the sunscreen product of Application Example 1 in Effect Example 2. DETAILED DESCRIPTION

[0052] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0053] Unless otherwise specified, the reagents, methods and equipment used in the present invention are all conventional reagents, methods and equipment in the art; and unless otherwise specified, the raw materials used in parallel experiments are from the same batch of raw materials.

[0054] Curcuma Radix Extract 1: homemade, the preparation method is as follows: crush Curcuma Radix, then add the crushed Curcuma Radix to a 50% by mass ionic liquid aqueous solution (in the ionic liquid, the mass ratio of betaine, glycerol and propylene glycol is 20:88:2) at a solid-liquid ratio of 5:100, then stir at 25°C for 60 minutes, then centrifuge and filter, collect the filtrate, concentrate, and dry to constant weight to obtain Curcuma Radix Extract 1;

[0055] Curcuma Radix Extract 2: homemade, the preparation method is as follows: grind Curcuma Radix and then add the grinded Curcuma Radix to a 50% by mass aqueous solution of propylene glycol at a solid-liquid ratio of 5:100, then stir at 25°C for 60 minutes, then filter, collect the filtrate, concentrate, and dry to constant weight to obtain Curcuma Radix Extract 2;

[0056] Curcuma Radix Extract 3: homemade, the preparation method is as follows: grind Curcuma Radix, then add the grinded Curcuma Radix to 50% by mass aqueous solution of butanediol at a solid-liquid ratio of 5:100, then stir at 25°C for 60 minutes, then filter, collect the filtrate, concentrate, and dry to constant weight to obtain Curcuma Radix Extract 3;

[0057] Alpinia officinalis extract: homemade, the preparation method is: take alpinia officinalis and grind it, then add the grinded alpinia officinalis to 50% by mass percentage of ionic liquid (in the ionic liquid, the mass ratio of betaine, glycerol and propylene glycol is 20:88:2) aqueous solution at a solid-liquid ratio of 5:100, then stir at 25°C for 60 minutes, then centrifuge and filter, collect the filtrate, concentrate, and dry to constant weight to obtain the alpinia officinalis extract;

[0058] Pueraria root extract: Homemade, the preparation method is: grind the Pueraria root, then add the grinded Pueraria root to a 50% by mass aqueous solution of an ionic liquid (in the ionic liquid, the mass ratio of betaine, glycerol and propylene glycol is 20:88:2) at a solid-liquid ratio of 5:100, then stir at 25°C for 60 minutes, then centrifuge and filter, collect the filtrate, concentrate, and dry to constant weight to obtain the Pueraria root extract.

[0059] Examples 1-12 and Comparative Examples 1-6

[0060] Examples 1-12 of the present invention and Comparative Examples 1-6 provide a plant sunscreen composition, the components (parts by weight) of the plant sunscreen composition are shown in Table 1;

[0061] Table 1

[0062]

[0063] The preparation method of the plant sunscreen composition provided in Example 1 is as follows: the physical sunscreen agent and the chemical sunscreen agent are dissolved using dicaprylyl carbonate (the mass ratio of dicaprylyl carbonate to the plant sunscreen composition is 8:15), polyglycerol-10 oleate (the mass ratio of polyglycerol-10 oleate to the plant sunscreen composition is 1:5) is added and mixed evenly, and then the mixture is emulsified with water (the mass ratio of water to the plant sunscreen composition is 8:37), and a plant synergist is added to obtain a plant sunscreen composition.

[0064] The preparation methods of the plant sunscreen compositions provided in Examples 2-12 and Comparative Examples 1-6 are consistent with that in Example 1.

[0065] Comparative Example 7

[0066] The comparative example of the present invention provides a plant sunscreen composition, the only difference between the plant sunscreen composition and Example 1 is that the Curcuma extract is used to replace the Curcuma Radix Extract 1.

[0067] Comparative Example 8

[0068] The comparative example of the present invention provides a plant sunscreen composition, the only difference between the plant sunscreen composition and Example 1 is that the Curcuma longa extract is used instead of the Curcuma aromatica extract 1.

[0069] Comparative Example 9

[0070] The comparative example of the present invention provides a plant sunscreen composition, the only difference between the plant sunscreen composition and Example 1 is that the Amomum villosum extract is replaced with the Amomum villosum extract.

[0071] Comparative Example 10

[0072] The comparative example of the present invention provides a plant sunscreen composition, the only difference between the plant sunscreen composition and Example 1 is that the cardamom extract is replaced by sage seed extract.

[0073] Application examples 1-13, comparative application examples 1-10 and blank application examples

[0074] Application Examples 1-13, Comparative Application Examples 1-10 and Blank Application Examples of the present invention provide a sunscreen product, the components (mass percentage) of the sunscreen product are shown in Table 2; wherein the plant sunscreen compositions in Application Examples 1-12 are respectively the plant sunscreen compositions prepared in Examples 1-12, and the plant sunscreen compositions in Comparative Application Examples 1-10 are respectively the plant sunscreen compositions prepared in Comparative Examples 1-10; for example, the plant sunscreen composition used in Application Example 6 is the plant sunscreen composition prepared in Example 6, and the same applies to the others; the plant sunscreen composition used in Application Example 13 is the plant sunscreen composition prepared in Example 1;

[0075] Table 2

[0076]

[0077]

[0078] The preparation method of the sunscreen product provided in Application Example 1 is:

[0079] The chemical sunscreen and emulsifier are mixed and heated to 80-90°C for homogenization, and then cooled to 40-50°C. Subsequently, a film former, an emollient and a physical sunscreen are added to homogenize into a uniform oil phase. Subsequently, a moisturizer, a thickener and water are added at 20-30°C for emulsification. After the emulsification is completed, a plant synergistic composition and a preservative are added and stirred to obtain a sunscreen product.

[0080] The preparation methods of the sunscreen products provided in Application Examples 2-13, Comparative Application Examples 1-10 and Blank Application Examples are consistent with that in Application Example 1, and no relevant components are added if they are not present.

[0081] Effect Example 1

[0082] The performance of the plant sunscreen compositions prepared in Examples 1-12 and Comparative Examples 1-10 and a blank control (the blank control is a mixture of dicaprylyl carbonate, polyglycerol-10 oleate and water, i.e., the only difference from Example 1 is that it does not contain a physical sunscreen, a chemical sunscreen and a plant synergist) is verified in the present invention, specifically including the following aspects:

[0083] 1. Anti-ultraviolet performance

[0084] Take 1g of the sample and spread it evenly on 3M latex tape, place it in a 37℃ constant temperature box for 20min, take it out and attach it to the light-transmitting side of the quartz cuvette, and use a UV spectrophotometer to detect the UV absorption value in the 280-400nm band; obtain a UV absorption value every 10nm UV wavelength; the UV absorption value of a certain band is the arithmetic average UV absorption value of each point in the band; the results are shown in Table 3.

[0085] 2. DPPH free radical scavenging performance

[0086] (1) Dissolve 0.001972 g of DPPH in anhydrous ethanol solution and dilute to 25 mL with anhydrous ethanol solution to obtain DPPH test solution;

[0087] (2) The plant sunscreen composition prepared in the examples, comparative examples and blank controls was used as a sample. 1 g of the composition sample was weighed and prepared into a 10% sample test solution in PBS. The solutions in tubes A, B and C were prepared respectively as follows. The solution was placed in the dark at room temperature for 30 min. The absorbance was measured at 517 nm and the absorbance value was recorded. The test was repeated 3 times for each sample.

[0088] Tube A: 2mL sample test solution + 2mL DPPH test solution;

[0089] Tube B: 2 mL DPPH test solution + 2 mL PBS;

[0090] Tube C: 2mL PBS + 2mL sample test solution;

[0091] Zero adjustment: anhydrous ethanol solution;

[0092] (3) The calculation method is: DPPH free radical scavenging rate = 1-(AC) / B×100%. The experiment was repeated 3 times and the average value was taken. Wherein A is the absorbance value of tube A, B is the absorbance value of tube B, and C is the absorbance value of tube C. The results are shown in Table 3.

[0093] 3. Tyrosinase inhibition performance

[0094] Positive control: Dilute with PBS buffer to a series of concentration gradients of 1 mg / mL, 0.2 mg / mL, 0.04 mg / mL, and 0.008 mg / mL to verify the test system;

[0095] Test substance treatment: dilute the test sample with PBS buffer to 10% sample test solution;

[0096] Prepare A, B, C, and D test tubes for each test sample and prepare a blank control tube according to the following requirements. After preparation, add 0.5 mL of L-DOPA solution (wherein the mass percentage of L-DOPA is 5%) to each tube. Keep the test tubes and the blank control tube in a constant temperature of 37°C for 30 minutes, and measure their absorbance values ​​at 475 nm respectively. Repeat the experiment for each sample 3 times;

[0097] The solution requirements for test tubes A, B, C, and D are as follows: Tube A: 3 mL PBS buffer and 0.5 mL tyrosinase; Tube B: 3.5 mL PBS buffer; Tube C: 1 mL sample solution, 2 mL PBS buffer and 0.5 mL tyrosinase; Tube D: 1 mL sample solution and 2.5 mL PBS buffer;

[0098] Zero adjustment: PBS solution;

[0099] The tyrosinase inhibition rate of the test sample was calculated according to the formula. The calculation formula of the tyrosinase inhibition rate is:

[0100] Tyrosinase inhibition rate = 1-(CD) / (AB)×100%;

[0101] Among them, A is the absorbance value of tube A, B is the absorbance value of tube B, C is the absorbance value of tube C, and D is the absorbance value of tube D; the results are shown in Table 3.

[0102] Table 3

[0103]

[0104]

[0105] As can be seen from Table 3, when the technical solution of the present invention is adopted, the obtained composition has excellent comprehensive performance, the absorbance of UVA and UVB is above 1.015 and 1.549 respectively, the scavenging rate of DPPH is above 67.8%, and the inhibition rate of tyrosinase is above 63.8%;

[0106] It can be seen from Examples 1-3 that the mass ratio of the plant synergist components in the plant sunscreen composition will affect the performance of the product. When the mass ratio of the components in the plant synergist is further selected within the scope of the present invention, the obtained composition has better comprehensive performance, the absorbance of UVA and UVB is above 1.371 and 2.027, respectively, the DPPH clearance rate is above 79.3%, and the tyrosinase inhibition rate is above 79.2%. It can be seen from Examples 1 and 4-7 that the mass percentage of the plant synergist in the plant sunscreen composition will also affect the comprehensive performance of the composition. When the mass percentage of the plant synergist in the plant sunscreen composition is further selected within the scope of the present invention, the obtained composition has better comprehensive performance, the absorbance of UVA and UVB is above 1.371 and 2.027, respectively, the DPPH clearance rate is above 79.3%, and the tyrosinase inhibition rate is above 79.2%. When the composition is within the scope of the invention, the obtained composition has better comprehensive performance, the absorbance of UVA and UVB is respectively above 1.206 and 1.836, the DPPH scavenging rate is above 78.5%, and the tyrosinase inhibition rate is above 72.5%; it can be seen from Examples 1 and 8 that the mass ratio of the plant synergist and the physical sunscreen will also affect the comprehensive performance of the composition; it can be seen from Examples 1 and 9-10 that the preparation method of the extract in the plant synergist will also affect the performance of the composition to a certain extent; it can be seen from Examples 1 and 11-12 that the types of physical sunscreens and chemical sunscreens will also affect the performance of the composition;

[0107] It can be seen from Example 1 and Comparative Examples 1-3 that when the mass percentage of the plant synergist and the mass ratio between the components are kept unchanged, but any one of them is not added, an excellent comprehensive effect cannot be achieved. Compared with Example 1, the absorbance of UVA in Comparative Examples 1-3 is reduced by 51.44-57.59%, the absorbance of UVB is reduced by 40.97-54.16%, the DPPH clearance rate is reduced by 49.49-50.96%, and the tyrosinase inhibition rate is reduced by 50.51-52.10%; It can be seen from Example 1 and Comparative Example 4 that when the plant synergist is not introduced, The performance of the obtained composition is significantly reduced, not only can the free radical scavenging and tyrosinase inhibition effects not be reflected, but also the absorption capacity of UVA and UVB is significantly reduced; it can be seen from Example 1 and Comparative Examples 5-6 that when no physical sunscreen or chemical sunscreen is introduced, the absorption capacity of the obtained composition for UVA and UVB is significantly reduced, and at the same time, the scavenging rate of DPPH and the tyrosinase inhibition rate are also significantly reduced; it can be seen from Example 1 and Comparative Examples 7-10 that when other similar components or substances with similar functional components are used to replace the components in the plant synergist of the present invention, excellent comprehensive effects cannot be achieved.

[0108] Effect Example 2

[0109] The performance of the sunscreen products prepared by the effect examples of the present invention, verification application examples 1-13, comparative application examples 1-10 and blank application examples, specifically includes the following aspects:

[0110] 1. SPF value and PFA value test

[0111] SPF value test: Tested in accordance with the requirements of the "Safety Technical Specifications for Cosmetics" (2015 edition). 120 volunteers aged 32 to 60 were selected and divided into 24 groups, with 5 people in each group. The minimum erythema dose (MED) of the subjects' skin to ultraviolet radiation was predicted and the ultraviolet radiation dose was adjusted. A spot no less than 30cm on the back of the subject was selected. 2 Normal skin area, (2.00±0.05)mg / cm 2 The test object or blank application example is evenly applied to the above area with the dosage of 1000mg / L, and then the irradiation dose is selected according to the specification requirements, and irradiation is carried out in three cases: ① The test object is not applied to the subject's skin; ② The control product (SPF value 16.1±2.4, prepared according to the standard formula of high SPF standard product P2 in the 2015 edition of the "Technical Specifications for Safety of Cosmetics"); ③ The test object is applied. Observe the experimental results after 24 hours, and record the MED values ​​in the three cases respectively.

[0112] SPF value calculation method: The SPF value of the test object or blank control protecting a single subject is expressed as follows:

[0113] SPFi = MED value of protected skin / MED value of unprotected skin;

[0114] Calculate the arithmetic mean of the SPF values ​​of all subjects protected by the tested object, and keep one decimal place for the result.

[0115] PFA value test: Tested in accordance with the requirements of the "Cosmetic Safety Technical Specifications" (2015 edition). 120 volunteers aged 32 to 60 were selected and divided into 24 groups, with 5 people in each group. The minimum melanin dose (MPPD) of the subjects' skin to ultraviolet radiation was predicted and the ultraviolet radiation dose was adjusted. A spot no less than 30cm on the back of the subject was selected. 2 Normal skin area, (2.00±0.05)mg / cm 2 The test object or blank application example is evenly applied to the above area, and then the UVA exposure amount is selected according to the specification requirements, and the exposure is carried out in three cases: ① The test object is not applied to the subject's skin; ② The control substance (PFA value 12.7±2.0, prepared according to the S2 formula in the ISO 24442 method) is applied; ③ The test object is applied. Observe the experimental results after 2 to 4 hours, and record the MPPD values ​​in the three cases respectively.

[0116] PFA value calculation method: The PFA value of the test substance or reference substance protecting a single subject is expressed as follows:

[0117] PFAi = MPPD value of protected skin / MPPD value of unprotected skin;

[0118] Calculate the arithmetic mean of the PFA values ​​of all subjects protected by the test object, and retain one decimal place.

[0119] The test results are shown in Table 4.

[0120] 2. TEWL and a* value improvement test

[0121] The test process is as follows: 120 volunteers aged 18-45 were selected. No skin care products were applied on the day of the visit. After washing their faces, the subjects sat quietly in a constant temperature and humidity room at 21±1℃ and 50±10% for 30 minutes. Visia-7 was used to take facial photos, and the exported red zone images were analyzed to obtain the a* value; the transepidermal water loss probe was used to measure the skin's transepidermal water loss. TM Hex (Courage+Khazaka) tests the initial facial TEWL value. The subjects were randomly divided into 24 groups, 5 in each group, and the blank application example, application examples 1-13, and comparison application examples 1-10 sunscreen products were randomly used on the whole face. TEWL tests and Visia-7 photography were performed on the 7th and 14th days, and the improvement of TEWL and a* value of each volunteer on the 0th, 7th, and 14th days was analyzed. The improvement is represented by the improvement rate of each value, and the calculation method is as follows:

[0122] Improvement rate relative to the initial value = |(X 使用后 -X 使用前 ) / X 使用前 ×100%|;

[0123] The test results are shown in Table 4;

[0124] Table 4

[0125]

[0126]

[0127] It can be seen from Table 4 that when the technical solution of the present invention is adopted, the obtained sunscreen product has excellent comprehensive performance, the SPF value and PFA value are respectively above 28.4 and 11.0, and the TEWL value improvement rate is above 20.55% and the a* value improvement rate is above 12.15% after 14 days of use;

[0128] It can be seen from Application Examples 1-3 that the mass ratio of the plant synergist components in the plant sunscreen composition will affect the performance of the product. When the mass ratio of the components in the plant synergist is further selected within the scope of the present invention, the comprehensive performance of the obtained sunscreen product is better, the SPF value and PFA value are respectively above 34.1 and 14.4, and the TEWL value improvement rate is above 25.21% and the a* value improvement rate is above 15.93% after 14 days of use; It can be seen from Application Examples 1 and Application Examples 4-7 that the mass percentage of the plant synergist in the plant sunscreen composition will also affect the comprehensive performance of the composition. When the mass percentage of the plant synergist in the plant sunscreen composition is further selected within the scope of the present invention, the comprehensive performance of the obtained sunscreen product is better, the SPF value and PFA value are respectively above 34.3 and 14.2, and the TEWL value improvement rate is above 25.11% and the a* value improvement rate is above 15.41% after 14 days of use;

[0129] It can be seen from Application Example 1 and Comparative Application Examples 1-3 that when the mass percentage of the plant synergist and the mass ratio between the components are kept unchanged, but any one of them is not added, an excellent comprehensive effect cannot be achieved; it can be seen from Application Example 1 and Comparative Application Example 4 that when the plant synergist is not introduced, the performance of the obtained composition is significantly reduced, which not only reflects the reduction of sunscreen ability, but also the reduction of after-sun repair ability; it can be seen from Application Example 1 and Comparative Application Examples 5-6 that when no physical sunscreen or chemical sunscreen is introduced, the sunscreen ability of the obtained product is significantly reduced; it can be seen from Application Example 1 and Comparative Application Examples 7-10 that when other similar components or substances with similar functional components are used to replace the components in the plant synergist of the present invention, an excellent comprehensive effect cannot be achieved;

[0130] In addition, the red zone test image of one of the volunteers in the sunscreen product prepared in Application Example 1 is as follows: Figure 1 As shown, from left to right are the graphs obtained from the tests on days D0, D7 and D14. Figure 1 It can also be intuitively seen that the use of the sunscreen product provided by the present invention can improve skin redness.

[0131] 3. Grease content test after use

[0132] 15 volunteers aged 18-45 were selected. No skin care products were applied on the day of the visit. After visiting the laboratory, they washed their faces with soap-based facial cleanser and sat quietly in a constant temperature and humidity room with a temperature of 21±1°C and a humidity of 50±10% for 2 hours. The initial facial oil content was tested using the skin oil box Sebumeter SM 815 (Courage+Khazaka). The subjects were randomly divided into 3 groups, 5 people in each group. Blank application examples, application example 1 products and commercially available products were randomly applied to the entire face. The oil content was tested on the 7th and 14th days, and the oil changes of each volunteer on the 7th and 14th days were analyzed. The oil content at each time point is represented by the average value of each value.

[0133] The results obtained are shown in Table 5;

[0134] Table 5

[0135]

[0136] It can be seen from Table 5 that, compared with commercially available products, the sunscreen product prepared using Application Example 1 of the present invention does not increase the oil secretion of the skin.

[0137] Effect Example 3

[0138] The effect example of the present invention verifies the applicability of the sunscreen product prepared in Application Example 1 to consumers with sensitive skin, and specifically includes the following steps:

[0139] Thirty Asian subjects with sensitive facial skin and recent sensitive skin symptoms were selected to participate in the test. Sunscreen products were distributed to them and each subject was given a 2mg / cm 2 Appropriate amount of the product was applied on the face for 28 days for sensitive skin suitability test. Consumers completed a questionnaire survey on the improvement of indicators such as feeling of use, discomfort, tolerance, mildness and non-irritation. The survey results are shown in Table 6;

[0140] Table 6

[0141]

[0142] It can be seen from Table 6 that the sunscreen product provided by the present invention can be used for daily sun protection for consumers with sensitive skin.

[0143] Finally, it should be noted that the above embodiments are intended to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A plant sunscreen composition suitable for sensitive skin, characterized in that: The plant sunscreen composition includes a plant synergistic composition, a physical sunscreen and a chemical sunscreen; The mass percentage of the plant synergistic composition is 20-45% based on the total mass of the plant sunscreen composition; The mass ratio of the plant synergistic composition to the physical sunscreen is 1:(0.6-0.7); The plant synergistic composition comprises Curcuma longifolia extract, Alpinia officinalis extract and Pueraria root extract; In the plant synergistic composition, the mass ratio of Curcuma australis extract, Alpinia oxyphylla extract and Pueraria root extract is 1:(1-3):(1-3); The physical sunscreen is zinc oxide and titanium dioxide, and the mass ratio of zinc oxide to titanium dioxide is 1:(0.5-3); The chemical sunscreen is diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, and ethylhexyl methoxycinnamate, and the mass ratio of the diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, and ethylhexyl methoxycinnamate is (1-1.5): (0.5-1): 1: (2-5).

2. The plant sunscreen composition according to claim 1, characterized in that: In the plant synergistic composition, the mass ratio of the Curcuma aromatica extract, the Alpinia oxyphylla extract and the Pueraria root extract is 1:2:

2.

3. The plant sunscreen composition according to claim 1, characterized in that: Based on the total mass of the plant sunscreen composition, the mass percentage of the plant synergistic composition is 25-35%.

4. The plant sunscreen composition according to claim 1, characterized in that: At least one of the following (a)-(c): (a) The preparation method of the Curcuma aromatica extract comprises the following steps: extracting Curcuma aromatica powder by mixing with an ionic liquid aqueous solution, then centrifuging and filtering, collecting the filtrate, concentrating, and drying to a constant weight to obtain the Curcuma aromatica extract; (b) The preparation method of the Alpinia oxyphylla extract comprises the following steps: extracting Alpinia oxyphylla powder by mixing with an ionic liquid aqueous solution, then centrifuging and filtering, collecting the filtrate, concentrating, and drying to a constant weight to obtain the Alpinia oxyphylla extract; (c) The method for preparing the kudzu root extract comprises the following steps: extracting kudzu root powder by mixing it with an ionic liquid aqueous solution, then centrifuging and filtering, collecting the filtrate, concentrating it, and drying it to a constant weight to obtain the kudzu root extract.

5. The plant sunscreen composition according to claim 4, characterized in that: The ionic liquid is a mixture of betaine, glycerol and propylene glycol.

6. Use of the plant sunscreen composition according to any one of claims 1 to 5 in the preparation of sunscreen products.

7. A sunscreen product, characterized in that: The sunscreen product comprises the plant sunscreen composition according to any one of claims 1 to 5.

8. The sunscreen product according to claim 7, characterized in that: The sunscreen product comprises the following components in percentage by mass: 7-20% of a plant sunscreen composition, 0.5-15% of an emollient, 0.1-5% of a film former, 5-12% of a moisturizer, 0.1-0.5% of a thickener, 0.5-2% of a preservative, 1-5% of an emulsifier, and the balance is water.

9. The sunscreen product according to claim 8, characterized in that: The film-forming agent includes at least one of trimethylsiloxysilicate and cyclopentasiloxane; And / or, the emulsifier includes at least one of polyglyceryl-10 oleate, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, and steareth-21; And / or, the moisturizing agent includes at least one of glycerol, 1,3-butylene glycol, and 1,2-pentanediol; And / or, the emollient includes at least one of dicaprylyl carbonate and propylene carbonate; And / or, the thickener comprises xanthan gum; And / or, the preservative includes at least one of p-hydroxyacetophenone and hexylene glycol.

10. The method for preparing a sunscreen product according to claim 9, characterized in that: The preparation method comprises the following steps: The chemical sunscreen and emulsifier are mixed, heated and homogenized, and then cooled. Subsequently, a film former, an emollient and a physical sunscreen are added and homogenized. Subsequently, a moisturizer, a thickener and water are added for emulsification. After the emulsification is completed, a plant synergistic composition and a preservative are added and stirred to obtain a sunscreen product.

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