A sunscreen product friendly to sensitive skin, ocean and coral and its preparation method

Abstract

A sunscreen product that is friendly to sensitive skin, oceans, and corals and a preparation method thereof, relates to the field of cosmetics, and includes the following components in weight percentage: 3%-15% inorganic sunscreen component, 2%-10% organic sunscreen component, 0.5%-10% emollient, 0.1%-5% film former, 0.01%-5% soothing component, and the balance is water. A sunscreen product that is friendly to sensitive skin, oceans, and corals of the present invention selects a suitable sunscreen agent, while increasing the sunscreen index of the sunscreen product, it will not cause environmental harm and is friendly to marine corals. The components synergize with each other to increase the durability of sunscreen; while reducing the amount of sunscreen agent used, the sunscreen index of the sunscreen product is increased, the irritation of the sunscreen product to the skin is reduced, the sunscreen product is more friendly to sensitive skin and has a strong waterproof sweat performance.

Description

Technical Field

[0001] The present invention relates to the field of cosmetics, and in particular to a sunscreen product that is friendly to sensitive skin, oceans and corals, and a preparation method thereof. Background Art

[0002] Tropical coral reefs provide rich ecosystem services such as coastal protection, fisheries and tourism to human societies around the world. They cover less than 0.1% of the seafloor, but support at least a quarter of all known marine species, and many coral reef species remain undiscovered. Due to their efficient nutrient retention and material recycling capabilities, corals thrive in low-nutrient warm water environments, creating biodiversity in these otherwise unproductive marine areas. Despite their high value to humans, various human activities are gradually pushing coral reefs to a critical point of functional collapse. In addition to the impacts associated with climate change, overfishing and destructive fishing, pollution and coastal development have led to the decline of coral reefs at a local scale.

[0003] Since 2014, people have begun to focus on the damage caused by sunscreen products to the ocean and coral reefs. However, most products on the market, especially those marked with high sun protection for outdoor activities such as swimming, still use large amounts of preservatives and sunscreens that threaten the survival of coral reefs, thereby affecting the health of local corals and causing their death.

[0004] At present, the market focuses more on skin feel, SPF and cost. In order to achieve a refreshing skin feel, a large number of sunscreen products add a lot of alcohol, and some products even add a lot of alcohol. Although such products have a refreshing feeling, they are not suitable for fragile and sensitive skin, but will accelerate its sensitivity. Some products also pursue high indexes and pile up the amount of sunscreen added, which increases the burden on sensitive skin and causes discomfort.

[0005] In summary, the existing technologies generally have problems such as pollution to the marine environment and easy to cause certain irritation to the skin. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, one of the objects of the present invention is to provide a sunscreen product that is friendly to sensitive skin, oceans and corals. The sunscreen product is friendly to the marine environment, reduces the irritation of sunscreen components to the skin, and is suitable for use on sensitive skin.

[0007] The second object of the present invention is to provide a method for preparing the above-mentioned sunscreen product that is friendly to sensitive skin, oceans and corals, and the preparation process is simple.

[0008] One of the purposes of the present invention is achieved by the following technical solution:

[0009] A sunscreen product that is friendly to sensitive skin and oceans and corals, comprising the following components in percentage by weight: 3%-15% of an inorganic sunscreen component, 2%-10% of an organic sunscreen component, 0.5%-10% of an emollient, 0.1%-5% of a film former, 0.01%-5% of a soothing component, and the balance being water; wherein the inorganic sunscreen component is zinc oxide and / or titanium dioxide; and the organic sunscreen component is one or a combination of two or more of diethylaminohydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, butyl methoxydibenzoylmethane, ethylhexyl salicylate, dimethyl PABA ethylhexyl ester, methylene bisbenzotriazolyl tetramethylbutylphenol, polysilicone-15, or diethylhexyl butyramido triazone.

[0010] Preferably, the inorganic sunscreen component is a composition of zinc oxide and titanium dioxide; the mass ratio of zinc oxide to titanium dioxide is 1:(0.5-3).

[0011] Preferably, the organic sunscreen component is a composition of diethylaminohydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine and ethylhexyl triazone; the mass ratio of diethylaminohydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine and ethylhexyl triazone is (1-1.5):(0.5-1):1.

[0012] Preferably, the emollient is one or a combination of two or more of dicaprylyl carbonate, stearalkonium hectorite or propylene carbonate.

[0013] Preferably, the emollient is a composition of dicaprylyl carbonate, stearalkonium hectorite and propylene carbonate; the mass ratio of dicaprylyl carbonate, stearalkonium hectorite and propylene carbonate is 2:(0.4-0.6):(0.5-1).

[0014] Preferably, the soothing component is one or a combination of two or more of a Cistus monspeliensis extract, a phormidium persicinum extract or a fermentation product of Thermus thermophilus.

[0015] Preferably, the above-mentioned sunscreen product that is friendly to sensitive skin, ocean and coral also includes the following components in weight percentage: 0.5%-5% sunscreen enhancer, 0.01%-2% anti-blue light component, 0.1%-10% moisturizer and 1%-5% emulsifier.

[0016] Preferably, the sunscreen enhancer is one or a combination of butyl octanol salicylate or polyhydroxystearic acid; and the anti-blue light component is alfalfa extract.

[0017] The second object of the present invention is achieved by adopting the following technical solution:

[0018] A method for preparing a sunscreen product that is friendly to sensitive skin, oceans, and corals, comprising the following steps:

[0019] S1: mixing and heating an organic sunscreen component, an emulsifier and a sunscreen synergist to obtain a first mixture;

[0020] S2: cooling the first mixture, adding a film former, an emollient and an inorganic sunscreen component to the mixture to obtain a second mixture;

[0021] S3: adding moisturizer and water to the second mixture, adding anti-blue light component and soothing component after emulsification and stirring to prepare the sunscreen product that is friendly to sensitive skin and oceans and corals.

[0022] Preferably, the heating temperature of step S1 is 75-90°C, and the cooling temperature of step S2 is 35-50°C.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The sunscreen product of the present invention is friendly to sensitive skin, oceans and corals. It selects a suitable sunscreen agent to improve the sunscreen index of the sunscreen product, does not cause environmental harm and is friendly to ocean corals. The components work synergistically with each other to increase the durability of sunscreen; while reducing the amount of sunscreen agent used, the sunscreen index of the sunscreen product is increased, the irritation of the sunscreen product to the skin is reduced, the sunscreen product is more friendly to sensitive skin and has a strong water-resistant sweat performance.

[0025] The invention discloses a method for preparing a sunscreen product which is friendly to sensitive skin, ocean and coral, and can prepare the sunscreen product which is friendly to sensitive skin, ocean and coral. The preparation method has a simple process and is easy to operate. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0027] The present invention adopts a hydrogel expansion system to enable the sunscreen product to be evenly applied to the skin surface. Uneven application of the sunscreen product on the skin will cause accumulation of sunscreen products in some areas to irritate the skin, and the areas lacking sunscreen will be damaged by ultraviolet rays. In order to prevent this from happening, the present invention forms a hydrogel system through the synergistic effect of various components. After contacting the skin, these hydrogels absorb moisture from the skin and expand to form a protective film, which evenly covers the skin surface, can protect the skin from ultraviolet damage, reduce the skin burden caused by local accumulation of sunscreen agents, and prevent the sunscreen agents from penetrating into the skin, achieving a dual protection effect.

[0028] The first aspect of the present invention provides a sunscreen product that is friendly to sensitive skin and oceans and corals, comprising the following components in weight percentage: comprising the following components in weight percentage: 3%-15% of inorganic sunscreen components, 2%-10% of organic sunscreen components, 0.5%-10% of emollients, 0.1%-5% of film formers, 0.01%-5% of soothing components, and the balance being water; wherein the inorganic sunscreen components are zinc oxide and / or titanium dioxide; and the organic sunscreen components are one or a combination of two or more of diethylaminohydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, butyl methoxydibenzoylmethane, ethylhexyl salicylate, dimethyl PABA ethylhexyl ester, methylene bisbenzotriazolyl tetramethylbutylphenol, polysilicone-15, or diethylhexyl butyramido triazone.

[0029] In one embodiment, the inorganic sunscreen component is a composition of zinc oxide and titanium dioxide; the mass ratio of zinc oxide to titanium dioxide is 1:(0.5-3).

[0030] In one embodiment, the zinc oxide is wrapped with triethoxycaprylylsilane, and the titanium dioxide is wrapped with polydimethylsiloxane.

[0031] Zinc oxide, a UV absorber, uses reflection and scattering to resist UVA and UVB, covering almost all wavelengths, and is a physical powder sunscreen ingredient. It is astringent, oil-absorbing, and water-absorbing, and has partial antibacterial and drying effects on acne, and has moderate covering power. Zinc oxide is an important and widely used physical sunscreen. The principle of shielding UV rays is absorption and scattering. After being wrapped with triethoxycaprylylsilane, it is safer and suitable for sensitive skin.

[0032] Titanium dioxide's strong UV resistance is due to its high refractive index and high photosensitivity. Compared with other organic sunscreens, nano titanium dioxide is non-toxic, stable, and effective. It is easily dispersed in oil and has excellent water resistance after being wrapped in polydimethylsiloxane.

[0033] In one embodiment, the organic sunscreen component is a combination of three of diethylaminohydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, butyl methoxydibenzoylmethane, ethylhexyl salicylate, dimethyl PABA ethylhexyl ester, methylene bisbenzotriazolyl tetramethylbutylphenol, polysilicone-15 or diethylhexyl butyramido triazone.

[0034] In one embodiment, the organic sunscreen component is a composition of diethylaminohydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine and ethylhexyl triazone; the mass ratio of diethylaminohydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine and ethylhexyl triazone is (1-1.5):(0.5-1):1.

[0035] In one embodiment, the emollient is one or a combination of two or more of dicaprylyl carbonate, stearalkonium hectorite or propylene carbonate.

[0036] In one embodiment, the emollient is a composition of dicaprylyl carbonate, stearalkonium hectorite and propylene carbonate; the mass ratio of dicaprylyl carbonate, stearalkonium hectorite and propylene carbonate is 2:(0.4-0.6):(0.5-1).

[0037] In one embodiment, the film-forming agent is one or a combination of two or more of cyclopentasiloxane, trimethylsiloxysilicate, ethylhexyl acrylate copolymer, hydrogenated polycyclopentadiene, polyvinyl pyrrolidone, hexadecene copolymer, lauryl methacrylate, polymethyl methacrylate or hydrogenated polydimethylsiloxane.

[0038] The film-forming agent is used in conjunction with the hydrogel swelling system to evenly cover the skin surface with a matte protective film with hydrophobic properties. Combined with a highly waterproof sunscreen agent, the entire sunscreen product has extremely strong water-resistant and sweat-proof properties after compounding and synergizing, meeting the needs of outdoor activities such as swimming, snorkeling, and marathons.

[0039] In one embodiment, the soothing component is one or a combination of two or more of a Cistus monspeliensis extract, a PHORMIDIUM persicinum extract or a Thermophilus thermophilus fermentation product.

[0040] In one embodiment, the soothing component is a composition of Cistus monspeliensis extract, PHORMIDIUM persicinum extract and Thermus thermophilus fermentation product; the mass ratio of Cistus monspeliensis extract, PHORMIDIUM persicinum extract and Thermus thermophilus fermentation product is (0.5-1):(0.5-1):1.

[0041] The soothing components, including Cistus monspeliensis extract and phormidium persicinum extract, are combined with the fermentation product of thermophilus thermophilus to block free radicals generated by light, repair extracellular matrix protein 1 (ECM1), soothe skin damaged by light, and relieve skin irritation that may be caused by sunscreen, making it better suited to the sun protection needs of sensitive skin.

[0042] The fermentation product of Thermus Thermophillus is a stable heat-activated enzyme obtained from extreme environments. It can prevent photoaging by combating inflammatory symptoms, promoting skin hydration, and maintaining the integrity of the dermal structure. Its protective ability increases with increasing temperature, which can maximize the scope of application of sunscreen products.

[0043] In one embodiment, the above-mentioned sunscreen product that is friendly to sensitive skin, oceans and corals also includes the following components in weight percentage: 0.5%-5% sunscreen enhancer, 0.01%-2% anti-blue light component, 0.1%-10% moisturizer and 1%-5% emulsifier.

[0044] In one embodiment, a sunscreen product that is friendly to sensitive skin and oceans and corals also includes the following components in weight percentage: 6.5%-15% inorganic sunscreen component, 7%-10% organic sunscreen component, 2%-5% emollient, 2%-5% film former, 0.01%-3% soothing component, 1%-3% sunscreen enhancer, 0.01%-1% anti-blue light component, 3%-5% moisturizer and 3%-5% emulsifier, and the balance is water.

[0045] In one embodiment, the sunscreen enhancer is butyl octanol salicylate or polyhydroxystearic acid, or a combination of both; and the anti-blue light component is alfalfa extract.

[0046] Sunscreen enhancers work with film-forming agents to promote uniform dissolution and dispersion of sunscreens, which can increase the durability of sunscreen and increase the sun protection index, thereby reducing the amount of sunscreen used and reducing the burden on the skin.

[0047] Adding the natural anti-blue light component alfalfa (MEDICAGO SATIVA) extract can reduce the active oxygen caused by high-energy visible blue light stimulating the skin other than ultraviolet light, reduce blue light damage, and soothe the skin.

[0048] In one embodiment, the moisturizing agent is one or a combination of two or more of 1,3-butylene glycol, glycerol, ethylhexylglycerol or 1,2-pentanediol.

[0049] In one embodiment, the emulsifier is one or a combination of two or more of polyglyceryl-10 oleate, lauryl PEG-9 polydimethylsiloxyethyl dimethicone or steareth-21.

[0050] The present invention also provides a method for preparing any of the above-mentioned sunscreen products that are friendly to sensitive skin, oceans, and corals, comprising the following steps:

[0051] S1: mixing and heating an organic sunscreen component, an emulsifier and a sunscreen synergist to obtain a first mixture;

[0052] S2: cooling the first mixture, adding a film former, an emollient and an inorganic sunscreen component to the mixture to obtain a second mixture;

[0053] S3: adding moisturizer and water to the second mixture, adding anti-blue light component and soothing component after emulsification and stirring to prepare the sunscreen product that is friendly to sensitive skin and oceans and corals.

[0054] In one embodiment, the heating temperature of step S1 is 75-90°C, and the cooling temperature of step S2 is 35-50°C.

[0055] The following is a specific example of a sunscreen product that is friendly to sensitive skin, oceans, and corals and a method for preparing the same.

[0056] The weight percentages of the raw material components of Examples 1-5, a sunscreen product that is friendly to sensitive skin, oceans, and corals, are shown in Table 1.

[0057] Table 1 Raw material components weight percentage

[0058]

[0059]

[0060] The preparation method of the sunscreen product that is friendly to sensitive skin, ocean and corals in Example 1-5 comprises the following steps: mixing an organic sunscreen component, an emulsifier and a sunscreen enhancer, heating them to 85°C, homogenously mixing them, cooling them to 45°C, adding a film former, an emollient and an inorganic sunscreen component to homogenize into a uniform oil phase, adding a moisturizer and water at room temperature, emulsifying at low temperature, adding an anti-blue light component and a soothing component, and stirring to obtain the sunscreen product that is friendly to sensitive skin, ocean and corals.

[0061] Comparative Example 1

[0062] A sunscreen product that is friendly to sensitive skin and oceans and corals, which differs from Example 1 in that no emollient and film-forming agent are added.

[0063] The preparation method of the above-mentioned sunscreen product that is friendly to sensitive skin, ocean and coral comprises the following steps: mixing an organic sunscreen component, an emulsifier and a sunscreen enhancer, heating them to 85°C, homogenizing and mixing them, cooling them to 45°C, adding an inorganic sunscreen component to homogenize into a uniform oil phase, adding a moisturizer and water at room temperature, emulsifying at low temperature, adding an anti-blue light component and a soothing component, and stirring to obtain the sunscreen product that is friendly to sensitive skin, ocean and coral.

[0064] Comparative Example 2

[0065] A sunscreen product that is friendly to sensitive skin and oceans and corals, which differs from Example 1 in that no inorganic sunscreen component is added.

[0066] The preparation method of the above-mentioned sunscreen product that is friendly to sensitive skin, ocean and coral comprises the following steps: mixing the organic sunscreen component, emulsifier and sunscreen enhancer, heating to 85°C, homogenizing, cooling to 45°C, adding the film former and the emollient to homogenize into a uniform oil phase, adding the moisturizer and water at room temperature, emulsifying at low temperature, adding the anti-blue light component and the soothing component, and stirring to obtain the sunscreen product that is friendly to sensitive skin, ocean and coral.

[0067] Test Example 1 SPF value determination

[0068] 1. Test samples: sunscreen products prepared in Examples 1-4 and Comparative Examples 1-2 that are friendly to sensitive skin, oceans, and corals.

[0069] 2. Test method: Use the instrument UV-2000F Ultraviolet Transmittance Analyzer UV-2000 in accordance with the "Determination Method of Sun Protection Index (SPF Value) of Sunscreen Cosmetics" on pages 554-555 of the "Cosmetic Safety Technical Specifications 2015 Edition", change the test site to the upper arm, and test the SPF value of the above sunscreen composition.

[0070] 3. Test results: See Table 2 for specific test results.

[0071] Table 2 SPF values ​​of different test samples

[0072]

[0073]

[0074] As can be seen from Table 2, the SPF sunscreen value of Example 1 reaches more than 50, and has a high protection against ultraviolet rays. The difference between Example 3 and Example 1 is that Example 3 increases the content of the sunscreen synergist, so that the content of the inorganic sunscreen component and the organic sunscreen component in the sunscreen product is reduced, but the protection effect against ultraviolet rays remains unchanged; the difference between Comparative Example 2 and Example 1 is that the inorganic sunscreen component is reduced. After the inorganic sunscreen component is reduced, the SPF sunscreen value is reduced by 25.5. As can be seen from the table, reducing one type of sunscreen agent will have a greater impact on the SPF value of the sunscreen product. Within the scope of the sunscreen product described in the present invention, the above-mentioned inorganic sunscreen component and organic sunscreen component are combined to achieve better protection effect.

[0075] Test Example 2 Waterproof Capability Test

[0076] 1. Test samples: sunscreen products prepared in Example 1 and Comparative Example 1 that are friendly to sensitive skin, oceans, and corals.

[0077] 2. Test method: According to the “Test method for water resistance of sunscreen cosmetics” on pages 559-560 of the “Technical Specification for Safety of Cosmetics 2015 Edition”, the test site was changed to the upper arm, and the SPF value of the sunscreen composition was tested after an 80-minute water resistance test.

[0078] 3. Test results: See Table 3 for specific test results.

[0079] Table 3 Waterproof test SPF value results

[0080]

[0081]

[0082] As shown in Table 3, the sunscreen product of Example 1 uses waterproof inorganic sunscreen components, organic sunscreen components, and a hydrophobic hydrogel system, and then compounded with a film-forming agent, so that the sunscreen product has excellent waterproof performance. In the 80-minute waterproof test, the average SPF value dropped by 10.9, which can meet the needs of outdoor sports such as swimming, snorkeling, and marathon. However, in Comparative Example 1, which does not add a film-forming agent and a hydrogel system, the SPF after bathing dropped to 18.7, indicating that the sunscreen product that is friendly to sensitive skin and oceans and corals has been destroyed by water, and the sunscreen product no longer has the performance of protecting against ultraviolet rays.

[0083] Test Example 3: Heat protection test

[0084] 1. Test samples: sunscreen products prepared in Examples 3 and 4 that are friendly to sensitive skin and the ocean and corals.

[0085] 2. Apply the above sunscreen products at a dosage of 2 mg / cm2 on a 5×5.2 cm PMMA plate, and test the SPF value of the product at 25, 30, 40, and 60°C according to the "Determination Method of Sunscreen Cosmetics Sun Protection Index (SPF Value)" on pages 554-555 of the "Technical Specifications for Safety of Cosmetics 2015 Edition".

[0086] 3. Test results: See Table 4 for specific test results.

[0087] Table 4 Results of SPF value under high temperature

[0088] Test samples 25℃ SPF value 30℃ SPF value 40℃ SPF value 60℃ SPF value Example 3 51.2 51.0 53.2 53.8 Example 4 50.8 51.0 44.2 38.2

[0089] The difference between Example 4 and Example 3 is that Thermus thermophilus is not added; as shown in Table 4, the sensitive skin, ocean, and coral-friendly sunscreen product of Example 3 with the addition of Thermus thermophilus can still maintain a good protection effect against ultraviolet rays at a high temperature of 60°C, while the sensitive skin, ocean, and coral-friendly sunscreen product of Example 4 has a continuously reduced sunscreen efficacy as the temperature increases, indicating that the sunscreen product with the addition of Thermus thermophilus has the characteristic of heat protection.

[0090] Test Example 4: Consumer Use Test on Sensitive Skin Suitability and Soothing Effect of Cosmetics

[0091] The sensitive skin and ocean- and coral-friendly sunscreen product of Example 1 was subjected to a consumer use test for suitability for sensitive skin and soothing efficacy. The test results are shown in Tables 5-7.

[0092] Test conditions:

[0093] (1) Volunteer screening: 30 healthy volunteers aged 18 to 59 years old with positive results in capsaicin or lactic acid stimulation tests were selected, regardless of gender.

[0094] (2) Test method: Sunscreen products were distributed to each subject. Each subject was tested at 2 mg / cm 2 Apply an appropriate amount of sunscreen products that are friendly to sensitive skin and oceans and corals on the face, and conduct a 28-day sensitive skin suitability test. (3) Efficacy judgment indicators: Consumer use test: Questionnaire survey on the degree of improvement in indicators such as feeling of use, discomfort, tolerance, mildness and non-irritation.

[0095] Table 5 Results of self-evaluation of skin feel after use by subjects (n=30)

[0096]

[0097] Table 6 Results of self-evaluation of the effect after use by the subjects (n=30)

[0098]

[0099]

[0100] Table 7 Results of self-evaluation of the effect after use by the subjects (n=30)

[0101]

[0102] The test results in Table 5-7 show that:

[0103] After using the sample for 4 weeks, among the 30 subjects, 100% of the subjects felt that the product was easy to apply and spread, 90% of the subjects felt that the product was more sweat-proof, 97% of the subjects felt that the product had a clear, refreshing and non-greasy texture, 100% of the subjects felt that the product was not easy to rub into mud, 100% of the subjects felt that the facial skin was not white or fake white, 97% of the subjects felt that the product had a strong sun protection effect, 93% of the subjects felt that the product could prevent the skin from getting red from the sun, 100% of the subjects felt that the product could prevent the skin from getting tanned, and 90% of the subjects felt that the product did not cause acne and inhibited acne growth.

[0104] After 0 and 4 weeks of using the samples, among the 30 subjects, 93% and 100% respectively felt that the facial skin tolerance was better, 100% and 100% respectively felt that the product was gentle and non-irritating, 97% and 100% respectively felt that the tingling sensation on the facial skin was improved, 100% and 100% respectively felt that the itching sensation on the facial skin was improved, 100% and 100% respectively felt that the tightness of the facial skin was improved, and 100% and 100% respectively felt that the burning sensation on the facial skin was improved.

[0105] Test Example 5: Biodegradation Performance Test in Seawater

[0106] 1. Test samples: sunscreen products prepared in Examples 1, 3 and Comparative Example 1 that are friendly to sensitive skin, oceans and corals.

[0107] 2. The experiment was tested in accordance with the standard of "GB / T 21815.1-2008 Shake flask test for biodegradability of chemicals in seawater". The sunscreen products prepared in Examples 1, 3 and Comparative Example 1, which are friendly to sensitive skin, oceans and corals, were added to the culture medium to prepare a 30 mg / L test solution and the test substance collected from the ocean was added, and the culture was stirred at a temperature of 20°C in the dark or scattered light and aerobic conditions. The DOC concentration was measured at 40d and 60d to determine the degradation rate. The culture medium was prepared by mixing 1 mL of pH 7.4 phosphate buffer, 1 mL of 27.5 g / L anhydrous calcium chloride solution, 1 mL of 22.5 g / L magnesium sulfate solution and 1 mL of 0.25 g / L ferric chloride hexahydrate, and adding the pretreated seawater to 1L. The collected seawater will be aged and pretreated. When the organic carbon concentration in the seawater sample is higher than 20% of the DOC concentration of the test substance culture medium, the seawater must be aged. Aging was carried out for about one week in the dark or diffuse light under aerobic conditions (gently stirring when necessary) at the test temperature to remove excess DOC. Before the test, the sample was pre-treated by filtering with a nylon filter or coarse filter paper to remove particulate matter. The degradation rate was calculated by the formula: (1-Ct-Cbl(t) / C0-Cbl(0))×100%, where C0 is the initial DOC of the test solution, Ct is the DOC of the test solution at time t, Cbl(0) is the initial DOC of the blank control group, and Cbl(t) is the DOC of the blank control group at time t.

[0108] 3. Test results: See Table 8 for specific test results.

[0109] Table 8 Biodegradation performance in seawater

[0110] Test products 40d biodegradation rate (%) 60d biodegradation rate (%) Example 1 56.36±2.47 72.37±1.26 Example 3 58.02±4.41 78.42±2.74 Comparative Example 1 28.97±1.36 37.83±1.72

[0111] The difference between Examples 1 and 3 and Comparative Example 1 is that no emollient and film former are added to Comparative Example 1; as shown in Table 7, the sunscreen products of Examples 1 and 3 that are friendly to sensitive skin, ocean, and corals and that add emollient and film former have good degradation performance in the 40d and 60d seawater shake bottle experiments, while the sunscreen product of Comparative Example 1 that is friendly to sensitive skin, ocean, and corals can also be partially degraded in seawater, but the degradation rate is far less than that of the former. The sunscreen product of the present invention has good waterproof performance and will not cause large-scale pollution to the ocean, and is an ocean-friendly product.

[0112] The above data indicate that the sensitive skin, ocean and coral friendly sunscreen product of the present invention is friendly to sensitive skin, has good biodegradability in seawater, and is suitable for use by people with fragile skin barriers.

[0113] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A sunscreen product that is friendly to sensitive skin, oceans, and corals, characterized in that: The invention comprises the following components in weight percentage: 3%-15% inorganic sunscreen component, 2%-10% organic sunscreen component, 2.5%-10% emollient, 2.5%-5% film former, 0.01%-5% soothing component, 0.5%-5% sunscreen synergist, 0.01%-2% anti-blue light component, 0.1%-10% moisturizer, 1%-5% emulsifier and the balance is water; Wherein, the inorganic sunscreen component is zinc oxide and / or titanium dioxide; The organic sunscreen component is a composition of diethylaminohydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine and ethylhexyl triazone; The emollients are dicaprylyl carbonate, stearalkonium hectorite and propylene carbonate; the mass ratio of dicaprylyl carbonate, stearalkonium hectorite and propylene carbonate is 2:(0.4-0.6):(0.5-1); The soothing component is one or a combination of two or more of the following: a Cistus polyphylla extract, a Psoralea corylifolia extract, or a fermentation product of Thermus thermophilus; The film-forming agent is trimethylsiloxysilicate and cyclopentasiloxane; the mass ratio of the trimethylsiloxysilicate to the cyclopentasiloxane is 1.5:

1.

2. A sunscreen product that is friendly to sensitive skin, oceans, and corals as claimed in claim 1, characterized in that: The inorganic sunscreen component is a composition of zinc oxide and titanium dioxide; the mass ratio of zinc oxide to titanium dioxide is 1:(0.5-3).

3. A sunscreen product that is friendly to sensitive skin, oceans, and corals as claimed in claim 1, characterized in that: The mass ratio of diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine and ethylhexyl triazone is (1-1.5):(0.5-1):

1.

4. A sunscreen product that is friendly to sensitive skin, oceans, and corals as claimed in claim 1, characterized in that: The sunscreen enhancer is one or a combination of butyl octanol salicylate or polyhydroxystearic acid; and the anti-blue light component is alfalfa extract.

5. A method for preparing a sunscreen product that is friendly to sensitive skin, oceans, and corals according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: mixing and heating an organic sunscreen component, an emulsifier and a sunscreen synergist to obtain a first mixture; S2: cooling the first mixture, adding a film former, an emollient and an inorganic sunscreen component to the mixture to obtain a second mixture; S3: adding moisturizer and water to the second mixture, adding anti-blue light component and soothing component after emulsification and stirring to prepare the sunscreen product that is friendly to sensitive skin and oceans and corals.

6. The method for preparing a sunscreen product that is friendly to sensitive skin, oceans, and corals according to claim 5, characterized in that: The heating temperature of step S1 is 75-90°C, and the cooling temperature of step S2 is 35-50°C.

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