Physical whitening waterproof skin care sunscreen lotion and preparation method thereof

Abstract

The invention provides a physical whitening waterproof skin care sunscreen lotion. The physical whitening waterproof skin care sunscreen lotion comprises the following components in parts by weight: 44 parts of a solvent, 8.55 parts of a humectant, 0.5 part of a pH regulator, 0.1 part of a chelating agent, 0.15 part of an aromatic, 22 parts of a sunscreen agent, 2 parts of a skin feeling regulator, 0.96 part of a skin protective agent, 1.5 parts of an emulsifier, 20 parts of an emollient and 1.2 parts of a thickener. Under the synergistic and comprehensive effects of the components, the obtained product has obvious improvement effects in the aspects of whitening, waterproofing, skin care, sunscreen and the like, and is safe and non-irritant to the skin.

Description

Technical Field

[0001] The invention relates to the technical field of cosmetic preparation, and in particular to a physical whitening, waterproof skin care and sunscreen lotion and a preparation method thereof. Background Art

[0002] UVB in ultraviolet (UV) rays can cause skin redness and pain in a short period of time, which is what we often call sunburn. Severe sunburn can cause skin swelling, blisters, and even peeling. For example, after being exposed to the sun for a long time at the beach, the skin will show obvious symptoms of sunburn. UVA can penetrate deep into the dermis of the skin and stimulate melanocytes to produce melanin. Melanin is the "culprit" of skin darkening. Excessive melanin deposition will make the skin darker. For example, people who drive frequently will have one side of their face darker than the other side due to long-term exposure to UVA through the car window glass. Both UVA and UVB accelerate the aging process of the skin. They destroy collagen and elastic fibers in the skin, causing the skin to wrinkle, sag, and become rough. This photoaging skin problem may appear earlier and more seriously than natural aging. Farmers, fishermen and other people who are exposed to the sun for a long time often have more wrinkles and age spots on their skin. Long-term and large amounts of ultraviolet exposure increase the incidence of skin cancer. Skin cancers such as basal cell carcinoma, squamous cell carcinoma and melanoma are all related to ultraviolet exposure.

[0003] Existing sunscreen products have problems such as limited protection, incomplete coverage of the sunscreen band, and insufficient protection. UVA can penetrate deep into the dermis of the skin, causing skin tanning, aging, and even skin cancer. If the UVA protection index of the sunscreen is low, or the product formula lacks effective UVA protection ingredients, it will be difficult to provide comprehensive protection. The sunscreen effect of some sunscreens will be affected in the case of excessive sweating or contact with water. If the waterproof performance is not good, the sunscreen can be easily washed away by sweat or water, resulting in a weakened sunscreen protection effect and the need for frequent reapplication. Summary of the invention

[0004] The purpose of the present invention is to provide a physical whitening and waterproof skin care sunscreen lotion and a preparation method thereof, which can significantly improve the waterproof, sunscreen and whitening effects of the skin care product by selecting special ingredients such as sunscreen agents, skin feel regulators, skin protectants, moisturizers and the like.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A physical whitening and waterproof skin care sunscreen lotion comprises the following components: a solvent, a moisturizing agent, a pH regulator, a chelating agent, a fragrance, a sunscreen, a skin feel regulator, a skin protectant, an emulsifier, a moisturizer and a thickener.

[0006] Furthermore, the weight proportions of the components are as follows: 44 parts of solvent, 8.55 parts of moisturizer, 0.5 parts of pH adjuster, 0.1 parts of chelating agent, 0.15 parts of fragrance, 22 parts of sunscreen, 2 parts of skin feel regulator, 0.96 parts of skin protectant, 1.5 parts of emulsifier, 20 parts of emollient and 1.2 parts of thickener.

[0007] Furthermore, the solvent includes 40 parts of deionized water and 4 parts of isododecane by weight; the moisturizer includes 5 parts of glycerin, 2 parts of dicaprylyl carbonate, 1 part of butylene glycol, 0.5 parts of 1,2-hexanediol and 0.05 parts of ethylhexylglycerin; the pH adjuster is sodium hydroxide; the chelating agent includes 0.05 parts of disodium EDTA and 0.05 parts of caprylhydroxamic acid; the fragrance is a daily fragrance; the skin feel regulator is polymethylsilsesquioxane; and the emulsifier is cetyl PEG / PPG-10 / 1 polydimethylsiloxane.

[0008] Furthermore, the sunscreen comprises 8 parts of sunscreen component A, 6 parts of sunscreen component B, 4 parts of sunscreen component C, 3 parts of sunscreen component D and 1 part of sunscreen component E; the A component comprises 80% titanium dioxide, 15% silica and 5% polydimethylsiloxane; the B component comprises 50.9% methylene bis-benzotriazolyl tetramethylbutylphenol, 40.35% water, 8% decyl glucoside, 0.4% butylene glycol and 0.35% xanthan gum; the C component is ethylhexyl salicylate; the D component is phenylbenzimidazole sulfonic acid; and the E component is homosalate.

[0009] Furthermore, the skin protective agent includes 0.5 parts of skin protective component A, 0.2 parts of skin protective component B, 0.15 parts of skin protective component C, 0.05 parts of skin protective component D, 0.05 parts of skin protective component E and 0.01 parts of skin protective component F; the skin protective component A includes 94.5% of purslane extract, 3.5% of butylene glycol and 2% of 1,2-hexanediol; the skin protective component B includes 91% of octyldodecanol, 5% of cymbidium flower / leaf / vine extract, and 2% of camellia seed extract. and 2% ginseng root extract; the skin protection component C is dipotassium glycyrrhizinate; the skin protection component D includes 96.2% aloe vera leaf juice, 2.5% glycerin, 0.5% trehalose, 0.48% butylene glycol, 0.24% 1,2-hexanediol and 0.08% caprylhydroxamic acid; the skin protection component E includes 64.7% glycerin, 35% water and 0.3% soluble collagen; the skin protection component F includes 93% water, 3.5% Poria cocos extract, 3% butylene glycol and 0.5% p-hydroxyacetophenone.

[0010] Furthermore, the emollient includes 15 parts of emollient component A, 3 parts of emollient component B and 2 parts of emollient component C; the emollient component A is polydimethylsiloxane; the emollient component B is isohexadecane; the emollient component C includes 60% polydimethylsiloxane and 40% PEG / PPG-18 / 18 polydimethylsiloxane.

[0011] Furthermore, the thickener is 0.5 parts of quaternary ammonium salt-18 bentonite, 0.5 parts of sodium chloride and 0.2 parts of polyglycerol-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane.

[0012] The preparation method of the physical whitening waterproof skin care sunscreen lotion comprises the following steps: S1: prepare sunscreen, skin protectant and emollient separately; S2: respectively prepare a solvent, a moisturizing agent, a chelating agent and a thickening agent according to the proportions at room temperature and set aside; S3: Take 44 parts of solvent, 8.55 parts of moisturizer, 22 parts of sunscreen, 2 parts of skin feel regulator and 0.96 parts of skin protectant, stir at a temperature of 70-80°C for 30-40 minutes; then add 1.5 parts of emulsifier, 0.5 parts of pH regulator, 0.1 parts of chelating agent, 0.15 parts of fragrance, 20 parts of emollient and 1.2 parts of thickener, reduce the temperature to 40-50°C, and after ultrasonic treatment and vacuum emulsification, the sunscreen lotion can be obtained.

[0013] Furthermore, in step S1, the sunscreen ingredients are mixed according to the ratio, stirred at a temperature of 70-80°C for 20-30 minutes to obtain the sunscreen; the skin protectant ingredients are mixed according to the ratio, stirred at a temperature of 90-110°C for 35-45 minutes to obtain the skin protectant; the emollient ingredients are mixed according to the ratio, stirred at a temperature of 75-85°C for 25-35 minutes to obtain the emollient.

[0014] Furthermore, in step S3, ultrasonic treatment is performed at a power of 850-1000 W for 5-10 minutes, and then a vacuum emulsifier is added to perform vacuum emulsification at 0.001-0.005 Pa for 15-25 minutes.

[0015] Compared with the prior art, the advantages and beneficial effects of the present invention are: The invention comprises titanium dioxide, silica, polydimethylsiloxane, methylene bis-benzotriazolyl tetramethylbutylphenol, decyl glucoside, ethylhexyl salicylate, phenylbenzimidazole sulfonic acid and homosalate as sunscreen components, and titanium dioxide and silica synergistically play a role in reflecting and scattering ultraviolet rays and absorbing ultraviolet rays, thereby achieving excellent protective effects; the invention comprises purslane extract, bellflower flower / leaf / vine extract, camellia seed extract, ginseng root extract, aloe vera leaf juice, trehalose, Poria cocos extract and the like as skin protectants, which play a role in protecting and protecting the skin, and enhancing the anti-inflammatory and antioxidant abilities of the skin; polydimethylsiloxane, isohexadecane, PEG / PPG-18 / 18 Emollients with ingredients such as polydimethylsiloxane fill the tiny cracks and gaps on the skin surface, making the skin surface smoother. At the same time, they form a protective film to prevent excessive loss of moisture in the skin and lock in moisture. With the combined effects of moisturizers, pH adjusters, chelating agents, fragrances, sunscreens, skin feel regulators, skin protectants, emulsifiers, emollients and other ingredients, the resulting dairy product has excellent whitening, waterproof, skin care and sun protection effects. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The raw materials used in the present invention are as follows: Portulaca oleracea extract was from Kangjun Biological Co., Ltd., item number 12; Belladonna flower / leaf / vine extract was from Xi'an Weite Biotechnology Co., Ltd.; Camellia seed extract was from Shaanxi Hengxi Biotechnology Co., Ltd., item number 555; Ginseng root extract was from Foshan Daoqi Biotechnology Co., Ltd., item number 12; Aloe barbadensis leaf juice was from Shanghai Puzhen Biotechnology Co., Ltd., item number 1072; Poria cocos extract was from Xi'an Tianyi Biotechnology Co., Ltd., item number 131.

[0018] Example 1 This embodiment provides a method for preparing a physical whitening and waterproof skin care sunscreen lotion, comprising the following steps: S1: Take 8g of sunscreen component A, 6g of sunscreen component B, 4g of sunscreen component C, 3g of sunscreen component D and 1g of sunscreen component E; the component A comprises 80% titanium dioxide, 15% silica and 5% polydimethylsiloxane; the component B comprises 50.9% methylene bis-benzotriazolyl tetramethylbutylphenol, 40.35% water, 8% decyl glucoside, 0.4% butylene glycol and 0.35% xanthan gum; the component C is ethylhexyl salicylate; the component D is phenylbenzimidazole sulfonic acid; the component E is homosalate; mix the above ingredients, stir at a temperature of 70°C and a speed of 500r / min for 20min to obtain a sunscreen; Take 0.5g of skin protection component A, 0.2g of skin protection component B, 0.15 parts of skin protection component C, 0.05 parts of skin protection component D, 0.05 parts of skin protection component E and 0.01 parts of skin protection component F; the skin protection component A comprises 94.5% of purslane extract, 3.5% of butylene glycol and 2% of 1,2-hexanediol; the skin protection component B comprises 91% of octyldodecanol, 5% of cymbidium flower / leaf / vine extract, 2% of camellia seed extract and 2% of ginseng root extract; the skin protection component C is dipotassium glycyrrhizate; The skin protection component D comprises 96.2% of aloe vera leaf juice, 2.5% of glycerol, 0.5% of trehalose, 0.48% of butylene glycol, 0.24% of 1,2-hexanediol and 0.08% of caprylhydroxamic acid; the skin protection component E comprises 64.7% of glycerol, 35% of water and 0.3% of soluble collagen; the skin protection component F comprises 93% of water, 3.5% of Poria cocos extract, 3% of butylene glycol and 0.5% of p-hydroxyacetophenone; the above ingredients are mixed, stirred at a temperature of 90°C and a speed of 600 r / min for 35 minutes to obtain a skin protection agent; 15g of emollient component A, 3g of emollient component B and 2g of emollient component C are mixed; the emollient component A is polydimethylsiloxane; the emollient component B is isohexadecane; the emollient component C comprises 60% polydimethylsiloxane and 40% PEG / PPG-18 / 18 polydimethylsiloxane; the mixture is stirred at a temperature of 75°C and a speed of 500r / min for 25min to obtain an emollient; S2: Take 40g of deionized water and 4g of isododecane and stir them at room temperature until they are uniform to obtain a solvent; take 5g of glycerin, 2g of dicaprylyl carbonate, 1g of butylene glycol, 0.5g of 1,2-hexanediol and 0.05g of ethylhexylglycerol and stir them at room temperature until they are uniform to obtain a moisturizer; take 0.05g of disodium EDTA and 0.05g of caprylhydroxamic acid and stir them at room temperature until they are uniform to obtain a chelating agent; take 0.5g of quaternary ammonium salt-18 bentonite, 0.5g of sodium chloride and 0.2g of polyglycerol-3 polydimethylsiloxyethyl polydimethylsiloxane and stir them at room temperature until they are uniform to obtain a thickener; S3: Take 44g of solvent, 8.55g of moisturizer, 22g of sunscreen, 2g of skin feel regulator and 0.96g of skin protectant, stir at a temperature of 70°C and a speed of 500r / min for 30min; then add 1.5g of emulsifier, 0.5g of pH regulator, 0.1g of chelating agent, 0.15g of fragrance, 20g of emollient and 1.2g of thickener, reduce the temperature to 40-50°C, ultrasonically treat at a power of 850W for 5min, and then add a vacuum emulsifier to emulsify under vacuum at 0.001Pa for 15min to obtain the sunscreen lotion.

[0019] Example 2 This embodiment provides a method for preparing a physical whitening and waterproof skin care sunscreen lotion, comprising the following steps: S1: Take 8g of sunscreen component A, 6g of sunscreen component B, 4g of sunscreen component C, 3g of sunscreen component D and 1g of sunscreen component E; the component A comprises 80% titanium dioxide, 15% silica and 5% polydimethylsiloxane; the component B comprises 50.9% methylene bis-benzotriazolyl tetramethylbutylphenol, 40.35% water, 8% decyl glucoside, 0.4% g butylene glycol and 0.35% xanthan gum; the component C is ethylhexyl salicylate; the component D is phenylbenzimidazole sulfonic acid; the component E is homosalate; mix the above ingredients, stir at a temperature of 80°C and a speed of 500r / min for 30min to obtain a sunscreen; Take 0.5g of skin protection component A, 0.2g of skin protection component B, 0.15g of skin protection component C, 0.05g of skin protection component D, 0.05g of skin protection component E and 0.01g of skin protection component F; the skin protection component A comprises 94.5% of purslane extract, 3.5% of butylene glycol and 2% of 1,2-hexanediol; the skin protection component B comprises 91% of octyldodecanol, 5% of cymbidium flower / leaf / vine extract, 2% of camellia seed extract and 2% of ginseng root extract; the skin protection component C is dipotassium glycyrrhizate; The skin protection component D comprises 96.2% of aloe vera leaf juice, 2.5% of glycerol, 0.5% of trehalose, 0.48% of butylene glycol, 0.24% of 1,2-hexanediol and 0.08% of caprylhydroxamic acid; the skin protection component E comprises 64.7% of glycerol, 35% of water and 0.3% of soluble collagen; the skin protection component F comprises 93% of water, 3.5% of Poria cocos extract, 3% of butylene glycol and 0.5% of p-hydroxyacetophenone; the above ingredients are mixed, stirred at a temperature of 90°C and a speed of 500 r / min for 35 minutes to obtain a skin protection agent; 15g of emollient component A, 3g of emollient component B and 2g of emollient component C are mixed; the emollient component A is polydimethylsiloxane; the emollient component B is isohexadecane; the emollient component C comprises 60% polydimethylsiloxane and 40% PEG / PPG-18 / 18 polydimethylsiloxane; the mixture is stirred at a temperature of 85°C and a speed of 800r / min for 35min to obtain an emollient; S2: Take 40g of deionized water and 4g of isododecane and stir them at room temperature until they are uniform to obtain a solvent; take 5g of glycerin, 2g of dicaprylyl carbonate, 1g of butylene glycol, 0.5g of 1,2-hexanediol and 0.05g of ethylhexylglycerol and stir them at room temperature until they are uniform to obtain a moisturizer; take 0.05g of disodium EDTA and 0.05g of caprylhydroxamic acid and stir them at room temperature until they are uniform to obtain a chelating agent; take 0.5g of quaternary ammonium salt-18 bentonite, 0.5g of sodium chloride and 0.2g of polyglycerol-3 polydimethylsiloxyethyl polydimethylsiloxane and stir them at room temperature until they are uniform to obtain a thickener; S3: Take 44g solvent, 8.55g moisturizer, 22g sunscreen, 2g skin feel regulator and 0.96g skin protectant, stir at a temperature of 75°C and a speed of 500r / min for 40min; then add 1.5g emulsifier, 0.5g pH regulator, 0.1g chelating agent, 0.15g fragrance, 20g emollient and 1.2g thickener, reduce the temperature to 50°C, ultrasonically treat at a power of 000W for 10min, then add a vacuum emulsifier and emulsify at 0.0005Pa for 25min to obtain the sunscreen lotion.

[0020] Example 3 This embodiment provides a method for preparing a physical whitening and waterproof skin care sunscreen lotion, comprising the following steps: S1: Take 8g of sunscreen component A, 6g of sunscreen component B, 4g of sunscreen component C, 3g of sunscreen component D and 1g of sunscreen component E; the component A comprises 80% titanium dioxide, 15% silica and 5% polydimethylsiloxane; the component B comprises 50.9% methylene bis-benzotriazolyl tetramethylbutylphenol, 40.35% water, 8% decyl glucoside, 0.4% g butylene glycol and 0.35% xanthan gum; the component C is ethylhexyl salicylate; the component D is phenylbenzimidazole sulfonic acid; the component E is homosalate; mix the above ingredients, stir at a temperature of 74°C and a speed of 500r / min for 25min to obtain a sunscreen; Take 0.5g of skin protection component A, 0.2g of skin protection component B, 0.15g of skin protection component C, 0.05g of skin protection component D, 0.05g of skin protection component E and 0.01g of skin protection component F; the skin protection component A comprises 94.5% of purslane extract, 3.5% of butylene glycol and 2% of 1,2-hexanediol; the skin protection component B comprises 91% of octyldodecanol, 5% of cymbidium flower / leaf / vine extract, 2% of camellia seed extract and 2% of ginseng root extract; the skin protection component C is dipotassium glycyrrhizate; The skin protection component D comprises 96.2% of aloe vera leaf juice, 2.5% of glycerol, 0.5% of trehalose, 0.48% of butylene glycol, 0.24% of 1,2-hexanediol and 0.08% of caprylhydroxamic acid; the skin protection component E comprises 64.7% of glycerol, 35% of water and 0.3% of soluble collagen; the skin protection component F comprises 93% of water, 3.5% of Poria cocos extract, 3% of butylene glycol and 0.5% of p-hydroxyacetophenone; the above ingredients are mixed, stirred at a temperature of 100° C. and a speed of 600 r / min for 40 minutes to obtain a skin protection agent; 15g of emollient component A, 3g of emollient component B and 2g of emollient component C are mixed; the emollient component A is polydimethylsiloxane; the emollient component B is isohexadecane; the emollient component C comprises 60% polydimethylsiloxane and 40% PEG / PPG-18 / 18 polydimethylsiloxane; the mixture is stirred at a temperature of 82°C and a speed of 500r / min for 30min to obtain an emollient; S2: Take 40g of deionized water and 4g of isododecane and stir them at room temperature until they are uniform to obtain a solvent; take 5g of glycerin, 2g of dicaprylyl carbonate, 1g of butylene glycol, 0.5g of 1,2-hexanediol and 0.05g of ethylhexylglycerol and stir them at room temperature until they are uniform to obtain a moisturizer; take 0.05g of disodium EDTA and 0.05g of caprylhydroxamic acid and stir them at room temperature until they are uniform to obtain a chelating agent; take 0.5g of quaternary ammonium salt-18 bentonite, 0.5g of sodium chloride and 0.2g of polyglycerol-3 polydimethylsiloxyethyl polydimethylsiloxane and stir them at room temperature until they are uniform to obtain a thickener; S3: Take 44g of solvent, 8.55g of moisturizer, 22g of sunscreen, 2g of skin feel regulator and 0.96g of skin protectant, stir at a temperature of 75°C and a speed of 600r / min for 35min; then add 1.5g of emulsifier, 0.5g of pH regulator, 0.1g of chelating agent, 0.15g of fragrance, 20g of emollient and 1.2g of thickener, reduce the temperature to 45°C, ultrasonically treat at a power of 950W for 8min, then add a vacuum emulsifier and vacuum emulsify at 0.003Pa for 20min to obtain the sunscreen lotion.

[0021] Comparative Example 1 The difference between this comparative example and Example 1 is that in step S1, the sunscreen agent only contains sunscreen component A, and the other steps are the same.

[0022] Comparative Example 2 The difference between this comparative example and Example 1 is that in step S1, the skin care agent only contains the skin protection component A, and the other steps are the same.

[0023] Comparative Example 3 The difference between this comparative example and Example 1 is that in step S1, the emollient only contains the emollient component A, and the other steps are the same.

[0024] Comparative Example 4 The difference between this comparative example and Example 1 is that the thickener in step S2 is only quaternary ammonium salt-18 bentonite, and the other steps are the same.

[0025] Comparative Example 5 The difference between this comparative example and Example 1 is that the vacuum emulsification treatment is not performed in step S3, and the other steps are the same.

[0026] Performance Test: The SPF test was performed using the SPF-290AS sun protection factor tester produced by Shanghai Yichi. The whiteness and humidity test was performed by selecting volunteers with dark yellow skin, obvious pigmentation and dry face and dividing them into 8 groups, with 10 subjects in each group. Before use, there was no significant difference in facial humidity and whiteness of the subjects in each group. Each group prepared a sunscreen lotion using each embodiment and comparative example, and applied it on the face after washing the face every morning and evening for 2 consecutive months. After washing the face, no makeup products were applied, and an intelligent water whiteness detector (Shenzhen Meilizhi Technology Co., Ltd.) was used to read the whiteness and humidity of the skin. A JC2000D2G water contact angle tester was used to perform a water contact angle test on the samples to test their waterproof performance.

[0027] The test results are shown in Table 1.

[0028]

[0029] From the above performance test results, it can be seen that Examples 1-3 have good sunscreen, whitening, waterproof and other properties, and have a long moisturizing duration. In particular, the comprehensive performance of Example 3 is the most outstanding. However, because Comparative Examples 1-5 do not adopt the necessary technical solutions, they are significantly worse than the embodiments in the corresponding performance tests. The above experimental results further prove the importance of the technical solutions defined in the present invention for its technical effects.

[0030] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A physical whitening waterproof skin care sunscreen lotion, characterized in that: The components include: solvents, moisturizers, pH adjusters, chelating agents, fragrances, sunscreens, skin feel adjusters, skin protectants, emulsifiers, emollients and thickeners.

2. A physical whitening waterproof skin care sunscreen lotion according to claim 1, characterized in that: The weight proportions of the components are as follows: 44 parts of solvent, 8.55 parts of moisturizer, 0.5 parts of pH adjuster, 0.1 parts of chelating agent, 0.15 parts of fragrance, 22 parts of sunscreen, 2 parts of skin feel regulator, 0.96 parts of skin protectant, 1.5 parts of emulsifier, 20 parts of emollient and 1.2 parts of thickener.

3. The physical whitening waterproof skin care sunscreen lotion according to claim 1, characterized in that: The solvent includes 40 parts of deionized water and 4 parts of isododecane by weight; the moisturizer includes 5 parts of glycerin, 2 parts of dicaprylyl carbonate, 1 part of butylene glycol, 0.5 parts of 1,2-hexanediol and 0.05 parts of ethylhexylglycerin; the pH regulator is sodium hydroxide; the chelating agent includes 0.05 parts of disodium EDTA and 0.05 parts of caprylhydroxamic acid; the fragrance is a daily fragrance; the skin feel regulator is polymethylsilsesquioxane; and the emulsifier is cetyl PEG / PPG-10 / 1 polydimethylsiloxane.

4. The physical whitening waterproof skin care sunscreen lotion according to claim 1, characterized in that: The sunscreen comprises 8 parts of sunscreen component A, 6 parts of sunscreen component B, 4 parts of sunscreen component C, 3 parts of sunscreen component D and 1 part of sunscreen component E; the A component comprises 80% titanium dioxide, 15% silica and 5% polydimethylsiloxane; the B component comprises 50.9% methylene bis-benzotriazolyl tetramethylbutylphenol, 40.35% water, 8% decyl glucoside, 0.4% butylene glycol and 0.35% xanthan gum; the C component is ethylhexyl salicylate; the D component is phenylbenzimidazole sulfonic acid; and the E component is homosalate.

5. The physical whitening waterproof skin care sunscreen lotion according to claim 1, characterized in that: The skin protective agent comprises 0.5 parts of skin protective component A, 0.2 parts of skin protective component B, 0.15 parts of skin protective component C, 0.05 parts of skin protective component D, 0.05 parts of skin protective component E and 0.01 parts of skin protective component F; the skin protective component A comprises 94.5% of purslane extract, 3.5% of butylene glycol and 2% of 1,2-hexanediol; the skin protective component B comprises 91% of octyldodecanol, 5% of cymbidium flower / leaf / vine extract, 2% of camellia seed extract and 2% of Ginseng root extract; the skin protection component C is dipotassium glycyrrhizinate; the skin protection component D includes 96.2% aloe vera leaf juice, 2.5% glycerin, 0.5% trehalose, 0.48% butylene glycol, 0.24% 1,2-hexanediol and 0.08% caprylhydroxamic acid; the skin protection component E includes 64.7% glycerin, 35% water and 0.3% soluble collagen; the skin protection component F includes 93% water, 3.5% Poria cocos extract, 3% butylene glycol and 0.5% p-hydroxyacetophenone.

6. The physical whitening waterproof skin care sunscreen lotion according to claim 1, characterized in that: The emollient comprises 15 parts of emollient component A, 3 parts of emollient component B and 2 parts of emollient component C; the emollient component A is polydimethylsiloxane; the emollient component B is isohexadecane; the emollient component C comprises 60% polydimethylsiloxane and 40% PEG / PPG-18 / 18 polydimethylsiloxane.

7. The physical whitening waterproof skin care sunscreen lotion according to claim 1, characterized in that: The thickener is 0.5 parts of quaternary ammonium salt-18 bentonite, 0.5 parts of sodium chloride and 0.2 parts of polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane.

8. A method for preparing a physical whitening waterproof skin care sunscreen lotion, characterized in that: The steps include: S1: prepare sunscreen, skin protectant and emollient separately; S2: respectively prepare a solvent, a moisturizing agent, a chelating agent and a thickening agent according to the proportions at room temperature and set aside; S3: Take 44 parts of solvent, 8.55 parts of moisturizer, 22 parts of sunscreen, 2 parts of skin feel regulator and 0.96 parts of skin protectant, stir at a temperature of 70-80°C for 30-40 minutes; then add 1.5 parts of emulsifier, 0.5 parts of pH regulator, 0.1 parts of chelating agent, 0.15 parts of fragrance, 20 parts of emollient and 1.2 parts of thickener, reduce the temperature to 40-50°C, and after ultrasonic treatment and vacuum emulsification, the sunscreen lotion can be obtained.

9. The method for preparing a physical whitening waterproof skin care sunscreen lotion according to claim 8, characterized in that: In step S1, the sunscreen ingredients are mixed according to the ratio, stirred at a temperature of 70-80° C. for 20-30 minutes to obtain the sunscreen; the skin protectant ingredients are mixed according to the ratio, stirred at a temperature of 90-110° C. for 35-45 minutes to obtain the skin protectant; the emollient ingredients are mixed according to the ratio, stirred at a temperature of 75-85° C. for 25-35 minutes to obtain the emollient.

10. The method for preparing a physical whitening waterproof skin care sunscreen lotion according to claim 8, characterized in that: In step S3, ultrasonic treatment is performed at a power of 850-1000 W for 5-10 minutes, and then a vacuum emulsifier is added to perform vacuum emulsification for 15-25 minutes.

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