Composition with light-blocking and sun-protection effects and application thereof

Abstract

The present invention provides a composition with light-blocking and sun-screening effects and its application, the composition including zinc oxide, lactobacillus / soy milk fermentation product filtrate, sunscreen aid and dispersant; the sunscreen aid includes silica, sodium calcium aluminum silicate, vinyl dimethicone / polymethicone silsesquioxane crosspolymer, polymethyl methacrylate, diphenyl dimethicone / vinyl diphenyl dimethicone / silsesquioxane crosspolymer or polymethyl silsesquioxane any one or a combination of at least two; the dispersant includes polyhydroxystearic acid, cholesteryl hydroxystearate, dipentaerythritol pentaisostearate, ethylhexyl hydroxystearate or dipentaerythritol tri-polyhydroxystearate any one or a combination of at least two. The composition can increase full-band sunscreen performance, avoid skin sunburn, tanning, sunburning, and strengthen the skin barrier.

Description

Technical Field

[0001] The present invention belongs to the technical field of cosmetics, and in particular relates to a composition with light-blocking and sun-protection effects and an application thereof. Background Art

[0002] In recent years, consumers have become increasingly concerned about the safety of sunscreen products. Inorganic physical sunscreens such as titanium dioxide and zinc oxide, known for their resistance to penetration and oxidation, have surpassed traditional chemical sunscreens. Sunscreen products claiming to offer purely physical sun protection and varying SPFs are emerging in large numbers. However, purely physical sunscreens suffer from a high degree of false whiteness. When added in small amounts, the SPF is low, while when added in high amounts, the skin can have a noticeable, unsightly, false white effect. Compared to titanium dioxide, zinc oxide has a lower false whiteness. To compensate for its limited absorption in the UVB band, it is often combined with other ingredients to enhance its overall sun protection performance.

[0003] CN108078848A discloses a sunscreen synergistic composition containing lithospermum officinale extract, ginger root extract, bisabolol, and epigallocatechin gallate, with the weight ratio of any two of them being 1:1-14:1. This composition can be added to conventional sunscreens, with the composition accounting for 12.5% ​​to 18% by weight of the total formulation. While the composition itself has no sunscreening effect, combined with conventional sunscreens, it significantly increases the sun protection factor (SPF), providing a new approach for producing high-SPF sunscreen products.

[0004] CN117643549A discloses a fast-film-forming, long-lasting, rub-resistant, high-factor sunscreen liquid. The sunscreen synergistic components include butyloctanol salicylate, trimethylsiloxysilicate, and stearalkonium hectorite. By specifically selecting three sunscreen synergistic components with different mechanisms of action, the liquid achieves fast film formation and long-lasting rub-resistant properties, while also improving the sun protection value and reducing the use of sunscreen agents.

[0005] While these ingredients offer some sunscreen synergistic benefits, they all carry risks. Antioxidants, due to their inherent oxidative properties, can cause noticeable odor and appearance changes, making them unsuitable for long-term storage. High levels of butyl octanol salicylate can also cause irritation. Consequently, there is an urgent need to develop a sunscreen synergistic product with safe, non-irritating ingredients and a pleasant skin feel. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a composition with light-blocking and sun-protection effects and its application. The composition provided by the present invention can effectively block ultraviolet radiation of the entire band, prevent skin from sunburn, tanning, and redness, and enhance the skin barrier.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a composition having light-blocking and sun-protection effects, the composition comprising zinc oxide, lactobacillus / soy milk fermentation product filtrate, a sunscreen adjuvant, and a dispersant;

[0009] The sunscreen adjuvant includes any one or a combination of at least two of silica, sodium calcium aluminum silicate, vinyl dimethicone / polymethylsiloxane silsesquioxane crosspolymer, polymethyl methacrylate, diphenyl dimethicone / vinyl diphenyl dimethicone / silsesquioxane crosspolymer or polymethylsilsesquioxane;

[0010] The dispersant includes any one of polyhydroxystearic acid, cholesterol hydroxystearate, dipentaerythritol pentaisostearate, ethylhexyl hydroxystearate or dipentaerythritol tri-polyhydroxystearate, or a combination of at least two thereof.

[0011] In the present invention, zinc oxide is used as a physical sunscreen agent, has good light stability, can protect the skin from ultraviolet sunburn, takes effect immediately after application, provides instant protection, and is invisible and does not cause false whitening; the lactobacillus / soy milk fermentation product filtrate contains a variety of active molecules such as amino acids, proteins, phospholipids, etc., has good skin affinity, can improve the strain diversity of beneficial bacteria on the skin surface, enrich the skin microbial film, promote the balance of the skin surface microecology, strengthen the skin barrier, and resist the invasion of external factors on the skin.

[0012] The composition provided by this invention effectively blocks UV radiation across the entire spectrum, protecting the skin from sunburn, tanning, and sunburn, and preventing skin aging caused by long-term sun exposure. Its ingredients are safe and non-irritating, gentle on the skin and unlikely to cause allergic reactions, while also strengthening the skin barrier. The Lactobacillus / soymilk fermentation product filtrate exhibits a synergistic effect with sunscreen adjuvants and dispersants, effectively enhancing UV protection across the entire spectrum.

[0013] Preferably, the composition comprises, by weight, 5-20 parts of zinc oxide, 0.05-0.3 parts of lactobacillus / soy milk fermentation product filtrate, 1-5 parts of sunscreen aid and 0.05-0.5 parts of dispersant.

[0014] The zinc oxide, lactobacillus / soy milk fermentation product filtrate, sunscreen adjuvant and dispersant in the present invention have excellent effects of resisting ultraviolet rays and protecting the skin barrier under the above specific ratio.

[0015] The weight parts of the zinc oxide can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0016] The weight proportions of the lactobacillus / soy milk fermentation product filtrate may be 0.05, 0.08, 0.1, 0.12, 0.15, 0.18, 0.2, 0.22, 0.25, 0.28, 0.3, etc.

[0017] The weight proportions of the sunscreen aid can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc.

[0018] The weight proportion of the dispersant can be 0.05 parts, 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, etc.

[0019] Other specific point values ​​within the above numerical ranges can be selected and will not be described in detail here.

[0020] Preferably, the sunscreen auxiliary agent includes silica (first sunscreen auxiliary agent), and further includes any one or a combination of at least two of calcium sodium aluminum silicate, vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosspolymer, polymethyl methacrylate, diphenyl polydimethylsiloxane / vinyl diphenyl polydimethylsiloxane / silsesquioxane crosspolymer or polymethylsilsesquioxane (second sunscreen auxiliary agent).

[0021] More preferably, the sunscreen aid is a combination of silica and sodium calcium aluminum silicate.

[0022] Preferably, the dispersant includes polyhydroxystearic acid (first dispersant) and further includes any one or a combination of at least two of cholesterol hydroxystearate, dipentaerythritol pentaisostearate, ethylhexyl hydroxystearate or dipentaerythritol tri-polyhydroxystearate (second dispersant).

[0023] More preferably, the dispersant is a combination of polyhydroxystearic acid and cholesteryl hydroxystearate.

[0024] The silica in this invention is naturally derived micron-sized spherical silica (3-20 μm) with excellent skin feel-regulating properties. Sodium calcium aluminum silicate has excellent adsorption properties, helping absorb excess oil, leaving the skin feeling fresher and less greasy. The inventors have innovatively discovered that silica and sodium calcium aluminum silicate have a synergistic effect. As sunscreen additives, they can further help scatter more UV rays, enhancing the sunscreen effect.

[0025] The polyhydroxystearic acid in this invention has good skin compatibility, helping the components disperse evenly and reducing residual marks. Cholesteryl hydroxystearate can reduce water loss, strengthen the skin barrier, and extend sun protection. The inventors discovered that polyhydroxystearic acid and cholesteryl hydroxystearate have a synergistic effect. As a dispersant, they can further help scatter more UV rays, enhancing the sun protection effect.

[0026] Preferably, the mass ratio of the first sunscreen auxiliary agent to the second sunscreen auxiliary agent is (1-5):(1-5).

[0027] The specific point values ​​in the first (1-5) can be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.; the specific point values ​​in the second (1-5) can be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.

[0028] Preferably, the mass ratio of the first dispersant to the second dispersant is (1-5):(1-5).

[0029] The specific point values ​​in the first (1-5) can be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.; the specific point values ​​in the second (1-5) can be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.

[0030] Other specific point values ​​within the above numerical ranges can be selected and will not be described in detail here.

[0031] In a second aspect, the present invention provides a use of the composition as described in the first aspect in preparing a sunscreen product.

[0032] Preferably, the sunscreen product includes a lotion, a cream, a gel, an essence, an essence oil or a spray; the mass percentage of the composition in the sunscreen product is 0.1-30%, for example, it can be 0.1%, 0.5%, 1%, 3%, 5%, 10%, 15%, 20%, 25%, 30%, etc.

[0033] Other specific point values ​​within the above numerical ranges can be selected and will not be described in detail here.

[0034] In a third aspect, the present invention provides a sunscreen lotion with light-blocking and sun-protection effects, comprising, by weight, 0.1-30 parts of the composition described in the first aspect, 1-5 parts of a film-forming agent, 25-35 parts of an emollient, 0.1-1 parts of a viscosity regulator, 1-5 parts of an emulsifier, 0.1-1 parts of a stabilizer, 5-10 parts of a polyol, and 20-80 parts of deionized water.

[0035] The sunscreen provided by the present invention can effectively block ultraviolet radiation of the entire band, protect the skin from sunburn, and avoid tanning and redness of the skin caused by long-term exposure to sunlight. The ingredients are safe and non-irritating, mild to the skin and not prone to allergic reactions, thereby strengthening the skin barrier.

[0036] The weight parts of the composition can be 0.1 parts, 0.5 parts, 1 parts, 3 parts, 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, etc.

[0037] The weight proportions of the film-forming agent can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc.

[0038] The weight parts of the emollient can be 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, etc.

[0039] The weight proportion of the viscosity modifier may be 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc.

[0040] The weight proportions of the emulsifier can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc.

[0041] The weight proportion of the stabilizer can be 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc.

[0042] The weight parts of the polyol can be 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, etc.

[0043] The weight proportions of the deionized water may be 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, etc.

[0044] Other specific point values ​​within the above numerical ranges can be selected and will not be described in detail here.

[0045] Preferably, the film-forming agent includes any one of trimethylsiloxysilicate, poly C10-30 alkyl acrylate or hydrogenated rosinate methyl ester, or a combination of at least two thereof.

[0046] More preferably, the film-forming agent is a combination of trimethylsiloxysilicate, poly C10-30 alkyl acrylate and hydrogenated methyl rosinate.

[0047] The trimethylsiloxysilicate, poly C10-30 alkyl acrylate and methyl hydrogenated rosinate in the present invention have a synergistic effect and can form a thin and breathable protective film on the skin surface, thereby enhancing the water resistance of the sunscreen lotion, strengthening the sunscreen barrier and improving the durability of the sunscreen.

[0048] Preferably, the emollient includes any one or a combination of at least two of isododecane, dimethicone, diisopropyl sebacate, isononyl isononanoate, propylene carbonate, squalane, C10-18 fatty acid triglycerides, cetyl ethylhexanoate or diisostearyl malate.

[0049] Preferably, the viscosity modifier includes any one of disteardimonium hectorite, quaternium-18 bentonite, stearalkonium chloride bentonite or quaternium-90 bentonite, or a combination of at least two thereof.

[0050] Preferably, the emulsifier includes any one of lauryl PEG-8 dimethicone, PEG-10 dimethicone, glyceryl stearate, PEG-9 polydimethylsiloxyethyl dimethicone, sorbitan isostearate, dimethicone PEG-10 / 15 crosspolymer or cetyl PEG / PPG-10 / 1 dimethicone, or a combination of at least two thereof.

[0051] Preferably, the stabilizer includes any one of sodium chloride, magnesium chloride, calcium chloride or magnesium sulfate, or a combination of at least two thereof.

[0052] Preferably, the polyol includes any one or a combination of at least two of butanediol, 1,2-hexanediol, 1,2-pentanediol, ethylene glycol, propylene glycol, dipropylene glycol, glycerol, polyethylene glycol or sorbitol.

[0053] Preferably, the sunscreen lotion further comprises 0.5-1 parts by weight of a preservative.

[0054] The weight proportion of the preservative can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, etc.

[0055] Preferably, the preservative comprises any one of phenoxyethanol, sodium benzoate or chlorphenesin, or a combination of at least two of them.

[0056] Other specific point values ​​within the above numerical ranges can be selected and will not be described in detail here.

[0057] In a fourth aspect, the present invention provides a method for preparing the sunscreen lotion according to the third aspect, the preparation method comprising:

[0058] (1) mixing a sunscreen additive, a film former, an emollient, and a viscosity modifier to obtain phase A;

[0059] Mix zinc oxide, dispersant and emulsifier to obtain phase B;

[0060] mixing a lactobacillus / soy milk fermentation product filtrate, a stabilizer, a polyol, and deionized water to obtain phase C;

[0061] (2) After mixing phase A and phase B, homogenize with phase C to obtain the sunscreen lotion.

[0062] Preferably, in step (1), the mixing method during the preparation of phase A, phase B and phase C is stirring.

[0063] Preferably, in step (2), the mixing method is to add phase A to phase B and stir, and the mixing time is 3-10 min, for example, 3 min, 4 min, 5 min, 6 min, 7 min, 8 min, 9 min, 10 min, etc.

[0064] Preferably, in step (2), the homogenization method is to add phase C under stirring, and the homogenization time is 3-10 min, for example, it can be 3 min, 4 min, 5 min, 6 min, 7 min, 8 min, 9 min, 10 min, etc.; the homogenization also includes a vacuum degassing step.

[0065] Other specific point values ​​within the above numerical ranges can be selected and will not be described in detail here.

[0066] Compared with the prior art, the present invention has the following beneficial effects:

[0067] The composition and sunscreen provided by the present invention effectively block UV radiation across the entire spectrum, protecting the skin from sunburn and preventing tanning and redness caused by long-term sun exposure. The ingredients are safe and non-irritating, gentle on the skin and unlikely to cause allergic reactions, while also strengthening the skin barrier. The Lactobacillus / soymilk fermentation product filtrate exhibits a synergistic effect with sunscreen adjuvants and dispersants, effectively enhancing UV protection across the entire spectrum. DETAILED DESCRIPTION

[0068] In order to further illustrate the technical means and effects adopted by the present invention, the technical solutions of the present invention are further described below in conjunction with the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments.

[0069] If no specific techniques or conditions are specified in the examples, the experiments were carried out according to the techniques or conditions described in the literature in the field or according to the product instructions. If no manufacturer is specified for the reagents or instruments used, they are all conventional products that can be purchased through regular channels.

[0070] The sources of materials used in the following specific embodiments are as follows:

[0071] Table 1

[0072]

[0073] Example 1

[0074] This embodiment provides a sunscreen lotion with light-blocking and sun-protection effects, which comprises the following components in parts by weight:

[0075] Table 2

[0076]

[0077] The preparation method is as follows:

[0078] (1) Mixing a sunscreen adjuvant, a film former, an emollient, and a viscosity regulator, stirring uniformly to obtain phase A; mixing zinc oxide, a dispersant, and an emulsifier, stirring and grinding uniformly to obtain phase B; mixing a lactobacillus / soy milk fermentation product filtrate, a stabilizer, a polyol, and deionized water, stirring uniformly to obtain phase C;

[0079] (2) Phase A was added to phase B and homogenized for 5 minutes. Phase C was added while stirring and homogenized for 5 minutes. The mixture was vacuum degassed to obtain the sunscreen lotion.

[0080] Example 2

[0081] This embodiment provides a sunscreen lotion with light-blocking and sun-protection effects, which comprises the following components in parts by weight:

[0082] Table 3

[0083]

[0084] The preparation method is as follows:

[0085] (1) Mixing a sunscreen adjuvant, a film former, an emollient, and a viscosity regulator, stirring uniformly to obtain phase A; mixing zinc oxide, a dispersant, and an emulsifier, stirring and grinding uniformly to obtain phase B; mixing a lactobacillus / soy milk fermentation product filtrate, a stabilizer, a polyol, and deionized water, stirring uniformly to obtain phase C;

[0086] (2) Phase A was added to phase B and homogenized for 3 minutes. Phase C was added while stirring and homogenized for 10 minutes. Vacuum degassing was performed to obtain the sunscreen lotion.

[0087] Example 3

[0088] This embodiment provides a sunscreen lotion with light-blocking and sun-protection effects, which comprises the following components in parts by weight:

[0089] Table 4

[0090]

[0091] The preparation method is as follows:

[0092] (1) Mixing a sunscreen adjuvant, a film former, an emollient, and a viscosity regulator, stirring uniformly to obtain phase A; mixing zinc oxide, a dispersant, and an emulsifier, stirring and grinding uniformly to obtain phase B; mixing a lactobacillus / soy milk fermentation product filtrate, a stabilizer, a polyol, and deionized water, stirring uniformly to obtain phase C;

[0093] (2) Phase A was added to phase B and homogenized for 10 min. Phase C was added while stirring and homogenized for 3 min. Vacuum degassing was performed to obtain the sunscreen lotion.

[0094] Example 4

[0095] This embodiment provides a sunscreen lotion with light-blocking and sun-protective effects. The only difference between this embodiment and the first embodiment is that sodium calcium aluminum silicate is omitted from the sunscreen additives, and the reduced amount is supplemented by silica. All other raw materials and their contents remain unchanged. The preparation method is similar to that of the first embodiment.

[0096] Example 5

[0097] This embodiment provides a sunscreen lotion with light-blocking and sun-protective effects. The only difference between this embodiment and the first embodiment is that silica is omitted from the sunscreen additives, and the reduced amount is supplemented by calcium sodium aluminum silicate. All other raw materials and their contents remain unchanged. The preparation method is similar to that of the first embodiment.

[0098] Example 6

[0099] This embodiment provides a sunscreen lotion with light-blocking and sun-protective effects. The only difference from Example 1 is that cholesteryl hydroxystearate is omitted from the dispersant, and the reduced amount is supplemented by polyhydroxystearic acid. All other raw materials and their contents remain unchanged. The preparation method is similar to that of Example 1.

[0100] Example 7

[0101] This embodiment provides a sunscreen lotion with light-blocking and sun-protective effects. The only difference from Example 1 is that polyhydroxystearic acid is omitted from the dispersant, and the reduced amount is supplemented by cholesteryl hydroxystearate. All other raw materials and their contents remain unchanged. The preparation method is similar to that of Example 1.

[0102] Example 8

[0103] This embodiment provides a sunscreen lotion with light-blocking and sun-protective effects. The only difference from Example 1 is that methyl hydrogenated rosinate is omitted, and its reduced amount is proportionally distributed among the other two components of the film-forming agent. The other raw materials and their contents remain unchanged. The preparation method is similar to that of Example 1.

[0104] Example 9

[0105] This embodiment provides a sunscreen lotion with light-blocking and sun-protective properties. The only difference from Example 1 is that poly (C10-30 alkyl acrylate) is omitted. Its reduced amount is proportionally distributed among the other two components of the film-forming agent. The other raw materials and their contents remain unchanged. The preparation method is similar to that of Example 1.

[0106] Example 10

[0107] This embodiment provides a sunscreen lotion with light-blocking and sun-protective properties. The only difference from Example 1 is that trimethylsiloxysilicate is omitted. Its reduced amount is proportionally distributed among the other two components of the film-forming agent, while the other raw materials and their contents remain unchanged. The preparation method is similar to that of Example 1.

[0108] Example 11

[0109] This embodiment provides a sunscreen lotion with light-blocking and sun-protection effects. The only difference between this embodiment and embodiment 1 is that methyl hydrogenated rosinate is replaced with an equal amount of triacontyl PVP, while the other raw materials and their contents remain unchanged. The preparation method thereof is similar to that of embodiment 1.

[0110] Comparative Example 1

[0111] This comparative example provides a sunscreen lotion with light-blocking and sunscreen effects. The only difference from Example 1 is that no dispersant is added; the reduced amount is proportionally distributed between the lactobacillus / soymilk fermentation product filtrate and the sunscreen adjuvant. All other ingredients and their contents remain unchanged. The preparation method is similar to that of Example 1.

[0112] Comparative Example 2

[0113] This comparative example provides a sunscreen lotion with light-blocking and sun-protective effects. The only difference from Example 1 is that no sunscreen adjuvant is added, and the reduced amount thereof is proportionally distributed among the lactobacillus / soymilk fermentation product filtrate and the dispersant. All other ingredients and their contents remain unchanged. The preparation method is similar to that of Example 1.

[0114] Comparative Example 3

[0115] This comparative example provides a sunscreen lotion with light-blocking and sun-protective effects. The only difference between this lotion and Example 1 is that the lactobacillus / soymilk fermentation product filtrate is omitted, and its reduced amount is proportionally distributed among the sunscreen adjuvant and dispersant. All other ingredients and their contents remain unchanged. The preparation method is similar to that of Example 1.

[0116] Comparative Example 4

[0117] This comparative example provides a sunscreen lotion with light-blocking and sun-protection effects, which differs from Example 1 only in that zinc oxide is replaced with an equal amount of micron-sized titanium dioxide. The preparation method thereof is similar to that of Example 1.

[0118] Test Example 1: Light Stability Test

[0119] Equal amounts of the sunscreen lotions prepared in Examples 1-7 and Comparative Examples 1-4 were evenly applied on a polymethyl methacrylate (PMMA) plate (HD6, 5 cm×5 cm). The amount of sample added was 2.0±0.2 mg / cm 2 The PMMA plate was fixed on the sample holder of the xenon lamp aging box, and the xenon lamp spectral range was set to 300 nm-400 nm and the irradiance was 36 W / m 2 , irradiate continuously for 2 hours; after taking out the PMMA plates, use the sun protection index test system to measure the absorbance of the three PMMA plates after irradiation, and measure 4 sites on each plate; calculate the average value of the 4 sites on each PMMA plate and the average value of the absorbance of the three PMMA plates, and calculate the photostability, the photostability reduction value A=(A0-At) / A0*100%, the absorbance value before irradiation is recorded as A0, and the absorbance value after irradiation is recorded as At. The larger A is, the more photodegradation is, and the worse the photostability is;

[0120] The test results are shown in Table 5. The sunscreen lotion provided by the present invention has excellent photostability and can effectively enhance ultraviolet protection. The lactobacillus / soy milk fermentation product filtrate has a synergistic effect with the sunscreen adjuvant and dispersant, which can effectively enhance photostability. The sunscreen adjuvant and dispersant can further affect the photostability.

[0121] Table 5

[0122]

[0123] Test Example 2 Human skin patch test

[0124] Refer to the human skin patch test method in the "Technical Specifications for Safety of Cosmetics" (2015 edition) to test the skin irritation of the product:

[0125] (1) Test substance: sunscreen lotion prepared in Examples 1-11; negative control: blank;

[0126] Subjects: 30 people, male / female, aged 20-50 years;

[0127] (2) Test method: Each subject selects a qualified patch tester and adds 0.020 g of the test substance to each patch tester using the closed patch test method. Specifically, each patch tester has multiple wells that can be used as sample filling positions, and different samples occupy different wells, while the blank control of the negative control is a well without any substance. The patch tester is applied to the curved side of the subject's forearm with special adhesive tape. The test substance is removed after 24 hours. The skin reaction is observed 30 minutes, 24 hours, and 48 hours after removal, and the results are recorded according to the skin reaction grading standard (Table 6) in the "Technical Specifications for Safety of Cosmetics" (2015 edition);

[0128] Table 6

[0129]

[0130] (3) Test results: No adverse skin reactions were observed in 30 subjects 30 minutes, 24 hours, and 48 hours after removing the test article spot tester; the composition and sunscreen ingredients provided by the present invention are safe, mild, non-irritating to the skin, and no positive reactions were observed.

[0131] Test Example 3 Determination of Sun Protection Index SPF Value

[0132] Refer to the "Determination Method of Sun Protection Index (SPF Value) of Sunscreen Cosmetics" in the "Technical Specifications for Safety of Cosmetics (2015 Edition)":

[0133] (1) Test substances: sunscreen lotions prepared in Examples 1-11 and Comparative Examples 1-4; negative control: blank;

[0134] Subjects: Male / Female, aged 20-50 years;

[0135] (2) Test method: Use a UV sun protection index analyzer (solar light source model 601) to irradiate an area with uniform skin color on the subject's back to determine the subject's MED (minimum erythema dose) value; divide the subject's back into multiple test areas with uniform skin color, and evenly apply the test substance to the corresponding divided areas at a rate of 2.00 mg / cm²; 30 minutes later, irradiate the area where the test substance was applied with a specified multiple of the MED irradiation dose, observe the erythema caused by the irradiation 24 hours later, calculate the arithmetic mean of the SPF values ​​of all the subjects' samples, and take the integer part as the SPF value of the test substance;

[0136] (3) Test results: As shown in Table 7, the composition and sunscreen lotion provided by the present invention can effectively block ultraviolet radiation of the entire wavelength range and protect the skin from sunburn; the lactobacillus / soy milk fermentation product filtrate has a synergistic effect with the sunscreen adjuvant and dispersant, and can effectively enhance the full-band ultraviolet protection effect; the sunscreen adjuvant, dispersant, and film-forming agent can further affect the sunscreen effect.

[0137] Table 7

[0138]

[0139] The present invention uses the above-described embodiments to illustrate a composition having a light-blocking and sunscreening effect and its application. However, the present invention is not limited to the above-described embodiments, and implementation of the present invention is not necessarily dependent on the above-described embodiments. Those skilled in the art will appreciate that any improvements to the present invention, equivalent replacements for various raw materials in the present invention, additions of auxiliary ingredients, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

[0140] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0141] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A composition having light-blocking and sun-protection effects, characterized in that: The composition comprises, by weight, 5-20 parts of zinc oxide, 0.05-0.3 parts of lactobacillus / soy milk fermentation product filtrate, 1-5 parts of sunscreen aid, and 0.05-0.5 parts of dispersant; The sunscreen auxiliary agent is silica and sodium calcium aluminum silicate; the mass ratio of silica and sodium calcium aluminum silicate is (1-5):(1-5); the dispersant is polyhydroxystearic acid and cholesterol hydroxystearate; the mass ratio of polyhydroxystearic acid and cholesterol hydroxystearate is (1-5):(1-5).

2. Use of the composition according to claim 1 in preparing sunscreen products.

3. The use according to claim 2, characterized in that The sunscreen product includes lotion, cream, gel, essence, essence oil or spray; the mass percentage of the composition in the sunscreen product is 0.1-30%.

4. A sunscreen lotion with light-blocking and sun-protection effects, characterized in that: The sunscreen lotion comprises, by weight, 0.1-30 parts of the composition of claim 1, 1-5 parts of a film former, 25-35 parts of an emollient, 0.1-1 parts of a viscosity regulator, 1-5 parts of an emulsifier, 0.1-1 parts of a stabilizer, 5-10 parts of a polyol, and 20-80 parts of deionized water.

5. The sunscreen lotion according to claim 4, characterized in that The film-forming agent includes any one of trimethylsiloxysilicate, poly C10-30 alkyl acrylate or hydrogenated rosin acid methyl ester, or a combination of at least two thereof.

6. The sunscreen lotion according to claim 4, characterized in that The emollient includes any one or a combination of at least two of isododecane, dimethicone, diisopropyl sebacate, isononyl isononanoate, propylene carbonate, squalane, C10-18 fatty acid triglycerides, cetyl ethylhexanoate or diisostearyl malate; The viscosity modifier includes any one of disteardimethylammonium hectorite, quaternary ammonium salt-18 bentonite, stearalkonium chloride bentonite or quaternary ammonium salt-90 bentonite, or a combination of at least two thereof; The emulsifier includes any one or a combination of at least two of lauryl PEG-8 dimethicone, PEG-10 dimethicone, glyceryl stearate, PEG-9 polydimethylsiloxyethyl dimethicone, sorbitan isostearate, dimethicone PEG-10 / 15 crosspolymer or cetyl PEG / PPG-10 / 1 dimethicone; The stabilizer includes any one of sodium chloride, magnesium chloride, calcium chloride or magnesium sulfate, or a combination of at least two thereof; The polyol includes any one or a combination of at least two of butanediol, 1,2-hexanediol, 1,2-pentanediol, ethylene glycol, propylene glycol, dipropylene glycol, glycerol, polyethylene glycol or sorbitol.

7. The method for preparing the sunscreen lotion according to any one of claims 4 to 6, characterized in that: The preparation method comprises: (1) mixing a sunscreen additive, a film former, an emollient, and a viscosity modifier to obtain phase A; Mix zinc oxide, dispersant and emulsifier to obtain phase B; mixing a lactobacillus / soy milk fermentation product filtrate, a stabilizer, a polyol, and deionized water to obtain phase C; (2) After mixing phase A and phase B, homogenize with phase C to obtain the sunscreen lotion.

8. The preparation method according to claim 7, characterized in that In step (1), the mixing method during the preparation of phase A, phase B and phase C is stirring; In step (2), the mixing method is to add phase A to phase B and stir, and the mixing time is 3-10 minutes; In step (2), the homogenization method is to add phase C under stirring, the homogenization time is 3-10 minutes, and the homogenization also includes a vacuum degassing step.

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