High-multiple sunscreen composition with light and thin skin feeling and preparation method and application thereof

Abstract

The application discloses a high-multiple sunscreen composition with light and thin skin feeling and a preparation method and application thereof, and belongs to the technical field of cosmetics. According to weight parts, components of the high-multiple sunscreen composition include: sunscreen agent 17-35 parts, skin feeling adjusting composition 1-11 parts, pre-emulsified slurry 1-4 parts, emulsifier 1.5-5 parts, emulsion stabilizer 0.4-2.2 parts, skin conditioner 2-7 parts, and water supplementing the rest to 100 parts. Through component formula and preparation method optimization, the scheme of the application can better solve the contradiction between product viscosity, stability and sunscreen effect; the prepared sunscreen composition has light and thin skin feeling, is not greasy, has low product viscosity, is stable in system, and has sunscreen effect reaching SPF50+ and PA++++ index.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to a high-SPF sunscreen composition with a lightweight feel, its preparation method, and its application. Background Technology

[0002] Sunscreen cosmetics, by blocking ultraviolet radiation, can effectively delay skin photoaging and pigmentation, and have become popular daily skincare products among consumers. Among them, high-SPF sunscreens (SPF50+, PA++++) are experiencing increasing market demand due to their stronger UV protection capabilities. Currently, sunscreen products are mainly divided into three categories based on their mechanism of action: purely physical sunscreens (based on inorganic UV-blocking agents such as titanium dioxide and zinc oxide), purely chemical sunscreens (relying on organic UV absorbers for protection), and combined physical and chemical sunscreens.

[0003] Pure chemical sunscreen systems dominate the mainstream consumer market due to their advantages such as easy spreadability, no whitening, and no powdery texture. However, to achieve a high protection index (SPF50+, PA++++), pure chemical sunscreen systems require the addition of high levels of organic sunscreen agents, which directly leads to serious defects such as greasiness and heavy skin feel. Existing technologies often improve the skin feel by adding volatile alcohols (such as ethanol) to reduce surface oiliness through rapid evaporation. However, alcohol solvents have side effects such as strong skin irritation and damage to the skin barrier function, which contradicts the current market trend of pursuing "alcohol-free formulas".

[0004] Sunscreen lotions are essentially O / W or W / O type emulsion systems composed of an oil phase, a water phase, and emulsifiers. Therefore, this system exhibits poor low-temperature / room-temperature stability, and is highly susceptible to oil phase precipitation (oil seepage), layering, or demulsification at low temperatures (≤5℃) or even room temperature (25℃). Low viscosity is key to improving product spreadability and a lightweight feel on the skin. However, to achieve system stability, existing high-SPF sunscreen products typically rely on high emulsifier / thickener content to maintain viscosity (9000-12000 mPa·s). Reducing viscosity directly weakens emulsification ability, leading to decreased stability and reduced sun protection efficiency. Therefore, there is a significant contradiction between viscosity (or skin feel) and system stability in existing sunscreen products.

[0005] The theoretical calculation of the sun protection factor (SPF / PA) can be based on the type and amount of sunscreen agents (such as the COLIPA standard). However, in actual human tests, there are often abnormal phenomena where a high amount of sunscreen agents corresponds to a low measured index. In extreme cases, it may even lead to the inability to detect an effective SPF value in human tests. The main reason is the defect in film uniformity or insufficient leveling and dispersion. However, reducing viscosity increases the risk of damaging the stability of the emulsion and can cause sunscreen agents to aggregate, which directly leads to a decrease in the sun protection value of the sunscreen product.

[0006] In conclusion, resolving the contradiction between the viscosity, stability, and sun protection effect of sunscreen products is an urgent problem that the industry needs to solve. Summary of the Invention

[0007] The technical solutions of this invention are twofold: first, to address the shortcomings of insufficient sun protection in existing sunscreen products; and second, to resolve the contradictions between the viscosity and stability of sunscreen agents and their SPF values ​​in existing technologies. Through optimization of component formulation and processes, the sunscreen composition of this application not only achieves excellent sun protection (SPF value ≥ 45), but also possesses a refreshing, non-sticky feel and excellent stability.

[0008] This application achieves the aforementioned technical effect through the following solution:

[0009] A high-SPF sunscreen composition with a light and thin feel, comprising, by weight: 17-35 parts sunscreen agent, 1-11 parts skin feel conditioning composition, 1-4 parts pre-emulsified paste, 1.5-5 parts emulsifier, 0.4-2.2 parts emulsion stabilizer, 2-7 parts skin conditioning agent, and water to make up to 100 parts.

[0010] Furthermore, the sunscreen agent includes at least one of UVA absorbers, UVB absorbers, broad-spectrum sunscreen agents, and biological sunscreen agents.

[0011] Furthermore, the UVA absorber mainly absorbs the 320-400nm wavelength band to prevent tanning and photoaging; the UVA absorber includes, but is not limited to, at least one of butyl methoxydibenzoylmethane (AVB) and ethyl diethylamino hydroxybenzoyl benzoate (DHHB); in one embodiment, the UVA absorber includes ethyl diethylamino hydroxybenzoyl benzoate.

[0012] Furthermore, the UVB absorber mainly absorbs the 290-320nm wavelength band to prevent sunburn; the UVB absorber includes, but is not limited to, at least one of ethylhexyl methoxycinnamate (OMC), ethylhexyl salicylate, homosalate, and octocrylene; in one embodiment, the UVB absorber includes ethylhexyl methoxycinnamate and ethylhexyl salicylate; in one embodiment, the ratio of ethylhexyl methoxycinnamate to ethylhexyl salicylate is 1-3:1, preferably 2:1.

[0013] Furthermore, a single ingredient in a broad-spectrum sunscreen can simultaneously cover both UVA and UVB, but the sun protection effect of a single ingredient is insufficient, and it needs to be compounded with other sunscreens to achieve full-spectrum protection; the broad-spectrum sunscreen includes, but is not limited to, at least one of bis-ethylhexyloxyphenol methoxyphenyl triazine (PS) and cresoltrazol trisiloxane (DTS); in one embodiment, the broad-spectrum sunscreen includes bis-ethylhexyloxyphenol methoxyphenyl triazine.

[0014] Furthermore, bio-sunscreens are a class of bioactive ingredients with indirect UV protection, antioxidant, and post-sun repair functions. They do not directly absorb or reflect UV rays, but rather assist in reducing UV damage to the skin by scavenging free radicals, inhibiting inflammation, and promoting repair. These bio-sunscreens include, but are not limited to, at least one of prickly pear ferment, resveratrol, grape seed extract, pomegranate extract, aloe vera extract, oat extract, and phycocyanin; in one embodiment, the bio-sunscreen includes prickly pear ferment.

[0015] In a preferred embodiment, the sunscreen agent includes a UVA absorber, a UVB absorber, a broad-spectrum sunscreen agent, and a biological sunscreen agent, in a ratio of 3-7:9-15:1-5:1-3; more preferably 4-6:10-13:2-4:1-3; and even more preferably 5:12:3:2.

[0016] Furthermore, the sunscreen composition further includes 1-6 parts of a nano-microemulsion sunscreen agent, preferably 2-5 parts.

[0017] Preferably, the nanoemulsion sunscreen agent is a methylene bis-benzotriazolyl tetramethylbutylphenol nanoemulsion with a particle size of 50-150 nm.

[0018] Further, the skin feel conditioning composition includes one or more of starch octenyl succinate aluminum, starch octenyl succinate sodium, and corn starch; in one embodiment, the ratio of starch octenyl succinate aluminum, starch octenyl succinate sodium, and corn starch in the skin feel conditioning composition is 1-5:0-3:0-3; in a preferred embodiment, the ratio of starch octenyl succinate aluminum, starch octenyl succinate sodium, and corn starch in the skin feel conditioning composition is 1-5:1-3:1-3. Starch-based octenyl succinate aluminum has strong hydrophobicity and an aluminum ion cross-linking structure, which can enhance the strength of the oil droplet interfacial film through electrostatic interaction, inhibiting oil phase aggregation and sebum diffusion. The amphiphilic nature of starch-based octenyl succinate sodium (octenyl succinate group is hydrophobic, sodium carboxylate is hydrophilic) can reduce the oil-water interfacial tension, improving spreadability and skin adhesion. Corn starch can adsorb excess lipids, avoiding an oily film feeling, and adsorb free water to reduce the fluidity of the aqueous phase, reducing the probability of oil droplet collision, thereby delaying phase separation. By using these three ingredients in combination and controlling their relative amounts, along with emulsifiers and emulsion stabilizers, not only can the skin feel of the product be effectively improved, but the stability of the product components can also be enhanced.

[0019] Furthermore, the pre-emulsified slurry comprises sodium acrylate / sodium acryloyl dimethyl taurate copolymer, polysorbate-80, sorbitan oleate, isohexadecane, xanthan gum, and water. In one embodiment, the ratio of sodium acrylate / sodium acryloyldimethyl taurate copolymer, polysorbate-80, sorbitan oleate, isohexadecane, xanthan gum, and water in the pre-emulsified slurry is 0.35-1.2:0.05-0.4:0.01-0.1:0.1-0.8:0.05-0.3:0.2-1.0; more preferably, the ratio of sodium acrylate / sodium acryloyldimethyl taurate copolymer, polysorbate-80, sorbitan oleate, isohexadecane, xanthan gum, and water in the pre-emulsified slurry is 0.55-0.9:0.01-0.25:0.03-0.07:0.3-0.6:0.05-0.2:0.4-0.8.

[0020] More preferably, the ratio of sodium acrylate / sodium acryloyl dimethyl taurate copolymer, polysorbate-80, sorbitan oleate, isohexadecane, xanthan gum and water in the pre-emulsified slurry is 0.75:0.15:0.05:0.45:0.1:0.6.

[0021] Furthermore, the preparation method of the pre-emulsified slurry includes the following steps: adding polysorbate-80, sorbitan oleate, xanthan gum and water to sodium acrylate / sodium acryloyl dimethyl taurate copolymer and dissolving in a water bath, and then adding isohexadecane for homogenization.

[0022] Further, the emulsifier includes, but is not limited to, at least one of cetearyl alcohol, diisopropyl sebacic acid, PEG-60 hydrogenated castor oil, alkyl glucoside, polyoxyethylene sorbitan fatty acid ester, and polyglycerol fatty acid ester; in one embodiment, the emulsifier includes cetearyl alcohol, diisopropyl sebacic acid, and PEG-60 hydrogenated castor oil. In one embodiment, the ratio of cetearyl alcohol, diisopropyl sebacic acid, and PEG-60 hydrogenated castor oil is 0.8-2.5:0.6-2:0.3-1, preferably 1-2:0.8-1.5:0.5-1, and more preferably 1.3-1.7:1-1.5:0.5-0.8. PEG-60 hydrogenated castor oil, as the primary emulsifier, can rapidly adsorb at the oil-water interface to form an initial interfacial film. If the interfacial film is too thick, it can cause a sudden increase in emulsion viscosity and whitening upon application; if insufficient, oil droplets will coalesce, leading to oil separation during high-temperature storage. Cetearyl alcohol, a fatty alcohol "auxiliary emulsifier-stabilizer," can insert into the interfacial film of PEG-60 hydrogenated castor oil, increasing film density and mechanical strength, significantly reducing the risk of flocculation and stratification; however, excessive amounts can easily form a fatty alcohol crystal network, making the emulsion thick and difficult to spread. Diisopropyl sebacic acid is a polar emollient with high solubility for sunscreens, further reducing interfacial tension and helping to form smaller, more uniform oil droplets, improving emulsion kinetic stability. The combination of these three components achieves a balance of small, uniform oil droplets, a dense interfacial film, and good sunscreen dissolution / dispersion. Too much or too little of any single component will disrupt this balance, leading to decreased stability, skin feel, or sun protection efficacy.

[0023] Further, the emulsifying stabilizer has an HLB value of 9-10, and includes, but is not limited to, at least one of polyoxyethanol sorbitan beeswax derivatives, tetraethylene glycol monolaurate, polyoxyethylene dehydrated sorbitan monostearate (Tween 61), polyoxyethylene dehydrated sorbitan monooleate (Tween 81), and potassium cetyl phosphate. In one embodiment, the emulsifying stabilizer includes potassium cetyl phosphate. PEG-60 hydrogenated castor oil, cetearyl alcohol, etc., are nonionic systems with limited tolerance to electrolytes or extreme pH environments; potassium cetyl phosphate can form charge repulsion and a phospholipid bilayer at the oil-water interface, significantly inhibiting flocculation and aggregation, and improving system stability; at the same time, its phosphate groups can form chemical anchoring with the groups on the surface of the skin feel modifier particles, preventing particle aggregation and further improving the SPF value.

[0024] Furthermore, the skin conditioning agent comprises at least one of the following: galactosomalidase ginseng fermentation filtrate, Scutellaria baicalensis root extract, Paeonia lactiflora root extract, Centella asiatica extract, Phyllanthus emblica fruit extract, Polygonum cuspidatum root extract, Panax ginseng root extract, and Fucus vesicola extract.

[0025] Preferably, the amounts of galactosomalidase-ginseng fermentation filtrate, scutellaria baicalensis root extract, peony root extract, centella asiatica extract, amla fruit extract, polygonum cuspidatum root extract, ginseng root extract, and fucus veitchii extract in the skin conditioning agent are 1-4 parts, 0.2-1.5 parts, 0.1-0.6 parts, 0.005-0.07 parts, 0.03-0.2 parts, 0.1-0.5 parts, 0.08-0.4 parts, and 0.1-0.5 parts, respectively; more preferably, they are 2-3.5 parts, 0.5-1 part, 0.15-0.4 parts, 0.008-0.03 parts, 0.1-0.2 parts, 0.2-0.4 parts, 0.1-0.25 parts, and 0.15-0.32 parts, respectively.

[0026] In a preferred embodiment, the proportions of the galactosomalid ginseng fermentation filtrate, scutellaria baicalensis root extract, peony root extract, centella asiatica extract, amla fruit extract, polygonum cuspidatum root extract, ginseng root extract, and fucus veitchii extract are 2.5 parts, 0.8 parts, 0.3 parts, 0.01 parts, 0.1 parts, 0.3 parts, 0.15 parts, and 0.27 parts, respectively.

[0027] Furthermore, the sunscreen composition further includes 2-5 parts of a complex alcohol; the complex alcohol includes butylene glycol and 1,2-hexanediol; the ratio of butylene glycol to 1,2-hexanediol is 3-4:0.5-1; preferably 3-3.5:0.5-1; more preferably 3:0.5-1. The complex alcohol is mainly used to swell skin conditioning agents. Its type affects the swelling effect of skin conditioning agents such as aluminum octenyl succinate particles. The difference in swelling effect mainly stems from the difference in the regulatory effect of factors such as alcohol polarity, carbon chain length, number of hydroxyl groups, and steric hindrance on the hydration capacity of aluminum octenyl succinate particles. Highly polar alcohols can quickly open the structure of aluminum octenyl succinate particles, but may lead to excessive swelling, while low polarity or highly volatile alcohols may lead to insufficient swelling or structural collapse. In this application, butylene glycol is a short-chain dihydroxyl alcohol with high polarity, rapid penetration, and strong swelling. 1,2-Hexanediol possesses a single hydroxyl group and a longer hydrophobic tail structure, resulting in slow penetration and weak swelling, but it exhibits high affinity for the oil phase, promoting oil droplet fixation. When used in combination, the two components synergistically enhance each other, making the hydrated structure of the particles more stable and shear-resistant.

[0028] Further, the sunscreen composition also includes 0.5-2 parts of an anti-allergic soothing composition, which includes, but is not limited to, at least two of the following: Portulaca oleracea extract, Prunus serrulata flower extract, Centella asiatica Urban extract, Glycyrrhiza uralensis Fisch root extract, Anthemis nobilis extract, Scutellaria baicalensis root extract, and Leontopodium alpinum Colm. ex Cass. flower extract. In one embodiment, the anti-allergic soothing composition includes Portulaca oleracea extract and Prunus serrulata flower extract. In one embodiment, the ratio of Portulaca oleracea extract to Prunus serrulata flower extract is 6-1:1, preferably 7-9:1.

[0029] Furthermore, this application also provides a method for preparing a high-SPF sunscreen composition, comprising the following steps: fully swelling the composition with a complex alcohol to adjust the skin feel until it is free of particles; and then mixing it evenly with the remaining components.

[0030] Starch-octenyl succinate aluminum is essentially a hydrophobically modified starch granule. It doesn't truly "dissolve" in water, but rather absorbs water and swells, forming a three-dimensional network structure. This structure can adsorb oils, sunscreens, and other hydrophobic active ingredients, thereby improving the stability and sun protection efficiency of the formulation. However, in this application, only by first swelling the starch-octenyl succinate aluminum with a complex alcohol before adding the swollen system to the formulation can the optimal SPF and product stability be obtained. This is likely because although the surface of starch-octenyl succinate aluminum has hydrophobicity due to the octenyl succinic acid groups, it is still generally amphiphilic-hydrophilic. Using a neutrally polar complex alcohol can break the intermolecular hydrogen bonds of starch-octenyl succinate aluminum, reducing its surface tension and allowing water to penetrate more easily into the granules, promoting water absorption and swelling. Without the swelling process, the starch-octenyl succinate aluminum granules are only surface-wetted in water, failing to swell sufficiently internally, resulting in insufficient structural support and inability to effectively fix the sunscreen, thus affecting the SPF value and stability.

[0031] In one embodiment, the method for preparing the high-SPF sunscreen composition includes the following steps:

[0032] S1. Use a compound alcohol to fully swell and adjust the skin feel of the composition until there are no particles, as a backup for item A;

[0033] S2. Mix the emulsifying stabilizer and the anti-allergic soothing composition, stir and heat to 80-90℃, homogenize at high speed and set aside as item B.

[0034] S3. Mix the UVA absorber, UVB absorber, broad-spectrum sunscreen, cetearyl alcohol, diisopropyl sebacate, and pre-emulsified slurry, stir and heat to 80-88℃, stir to dissolve, and set aside as item C.

[0035] S4. After mixing phase B and phase C, homogenize at high speed and stir at 80-88℃ for 10-30 minutes.

[0036] S5. Cool down to 50℃, add phase A and stir until homogeneous;

[0037] S6. Cool down to below 48°C and add the remaining components.

[0038] Furthermore, this application also provides the application of the high-SPF sunscreen composition in the preparation of sunscreen cosmetics, wherein the sunscreen cosmetics include any one of lotions, creams, gels, sprays, etc.

[0039] The beneficial effects of this invention are:

[0040] (1) The present invention uses a skin feel conditioning composition and uses a compound alcohol to swell it, which can effectively improve the solubility and dispersion of the skin feel conditioning composition in the product components. When used with specific emulsifiers, emulsion stabilizers and other ingredients, the viscosity of the product can be reduced. Under the premise of maintaining a good skin feel, the sunscreen ingredients can obtain excellent dispersion and flow, thereby effectively improving the sun protection effect and maintaining the good stability of the system.

[0041] (2) The sunscreen composition of the present invention has a light and thin skin feel, is not greasy, has low product viscosity, and the final product has a viscosity of only 6000-8000. The product system is stable, especially through low temperature stability, and the sunscreen effect can reach SPF50+ and PA++++ index. Through the optimization of component formulation and preparation method, the contradiction between product viscosity, stability and sunscreen effect can be better resolved.

[0042] (3) The sunscreen composition of the present invention contains a specific anti-allergic and soothing composition and a skin conditioning agent. Its ingredients are safe and have no adverse effects on the skin. It can be used in sunscreen cosmetics. Attached Figure Description

[0043] Figure 1 Photograph of the sunscreen composition of Example 1 after stability testing.

[0044] Figure 2 Photograph of the sunscreen composition of Comparative Example 6 after stability testing.

[0045] Figure 3 SPF test chart of the sunscreen composition of Example 1.

[0046] Figure 4 SPF test chart of the sunscreen composition in Comparative Example 14. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] Unless otherwise specified, the ratios mentioned in this application refer to the weight ratios of the substances; the methylene bis-benzotriazolyltetramethylbutylphenol nanoemulsion (MBBT) can be selected from MBTM (nano) DC of Guangzhou Dongcui Jingyan Biotechnology Co., Ltd., ShieldBiso-M nanoemulsion of Anhui Shunli Biotechnology, Tinosorb M Aqua 40% of BASF, and NeoHeliopan M 50 of Symrise.

[0049] Example 1

[0050] This embodiment provides a high-SPF sunscreen composition with a lightweight feel, which is described in parts by weight (total amount is 100 parts), and the specific composition is shown in Table 1.

[0051] Table 1

[0052]

[0053]

[0054] The pre-emulsified slurry, by weight, comprises: 0.75 parts sodium acrylate / sodium acryloyldimethyl taurate copolymer, 0.6 parts water, 0.45 parts isohexadecane, 0.15 parts polysorbate-80, 0.05 parts sorbitan oleate, and 0.1 parts xanthan gum. The preparation method is as follows: Polysorbate-80, sorbitan oleate, xanthan gum, and water are added to the sodium acrylate / sodium acryloyldimethyl taurate copolymer and dissolved in a water bath. Then, isohexadecane is added, and the mixture is homogenized for 10 minutes.

[0055] This embodiment also provides a method for preparing the high-SPF sunscreen composition, including the following steps:

[0056] S1. Use a compound alcohol to swell starch octenyl succinate aluminum, starch octenyl succinate sodium and corn starch at 55°C until there are no particles, and use this as option A for later use.

[0057] S2. Dissolve potassium cetyl phosphate and the anti-allergic soothing composition in water, stir and heat to 85°C, homogenize at high speed for 2 minutes, stir and dissolve evenly, and then use it as item B for later use.

[0058] S3. Mix ethylhexyl methoxycinnamate, ethylhexyl salicylate, hexyl diethylamino hydroxybenzoyl benzoate, ethylhexyl triazine ketone, diisopropyl sebacate, cetearyl alcohol, and pre-emulsified slurry, heat to 85°C, stir to dissolve, and set aside as item C.

[0059] S4. Vacuum the mixing device, draw the C phase into the device, homogenize at high speed for 4 minutes, add the B phase raw material, homogenize at high speed for 2 minutes, keep it at 80℃ and stir for 15 minutes, then start cooling.

[0060] S5. When the temperature drops to 50℃, add the pre-prepared phase A raw material and stir evenly.

[0061] S6. When the temperature drops below 48°C, add methylene bis-benzotriazolyl tetramethyl butylphenol emulsion, PEG-60 hydrogenated castor oil, prickly pear ferment, and skin conditioning agent, and stir well.

[0062] Example 2

[0063] This embodiment provides a high-SPF sunscreen composition with a lightweight feel, which is described in parts by weight (total amount is 100 parts), and the specific composition is shown in Table 2.

[0064] Table 2

[0065]

[0066] The pre-emulsified slurry, by weight, comprises: 0.9 parts sodium acrylate / sodium acryloyldimethyl taurate copolymer, 0.8 parts water, 0.6 parts isohexadecane, 0.25 parts polysorbate-80, 0.07 parts sorbitan oleate, and 0.2 parts xanthan gum. The preparation method is as follows: Polysorbate-80, sorbitan oleate, xanthan gum, and water are added to the sodium acrylate / sodium acryloyldimethyl taurate copolymer and dissolved in a water bath. Then isohexadecane is added, and the mixture is homogenized for 10 minutes.

[0067] This embodiment also provides a method for preparing the high-SPF sunscreen composition, including the following steps:

[0068] S1. Use a compound alcohol to swell starch octenyl succinate aluminum, starch octenyl succinate sodium and corn starch at 60℃ until there are no particles, and use this as option A for later use.

[0069] S2. Dissolve potassium cetyl phosphate and the anti-allergic soothing composition in water, stir and heat to 88°C, homogenize at high speed for 3 minutes, stir and dissolve evenly, and then use it as item B for later use.

[0070] S3. Mix ethylhexyl methoxycinnamate, ethylhexyl salicylate, diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl triazine ketone, diisopropyl sebacate, cetearyl alcohol, and pre-emulsified slurry, heat to 88°C, stir to dissolve, and set aside as item C.

[0071] S4. Vacuum the mixing device, draw the C phase into the device, homogenize at high speed for 5 minutes, add the B phase raw material, homogenize at high speed for 2 minutes, keep it at 80℃ and stir for 20 minutes, then start cooling.

[0072] S5. When the temperature drops to 50℃, add the pre-prepared phase A raw material and stir evenly.

[0073] S6. When the temperature drops below 48°C, add methylene bis-benzotriazolyl tetramethyl butylphenol emulsion, PEG-60 hydrogenated castor oil, prickly pear ferment, and skin conditioning agent, and stir well.

[0074] Example 3

[0075] This embodiment provides a high-SPF sunscreen composition with a lightweight feel, which is described in parts by weight (total amount is 100 parts), and the specific composition is shown in Table 3.

[0076] Table 3

[0077]

[0078]

[0079] The pre-emulsified slurry, by weight, comprises: 0.75 parts sodium acrylate / sodium acryloyldimethyl taurate copolymer, 0.6 parts water, 0.45 parts isohexadecane, 0.15 parts polysorbate-80, 0.05 parts sorbitan oleate, and 0.1 parts xanthan gum. The preparation method is as follows: Polysorbate-80, sorbitan oleate, xanthan gum, and water are added to the sodium acrylate / sodium acryloyldimethyl taurate copolymer and dissolved in a water bath. Then, isohexadecane is added, and the mixture is homogenized for 10 minutes.

[0080] This embodiment also provides a method for preparing the high-SPF sunscreen composition, including the following steps:

[0081] S1. Use a compound alcohol to swell starch octenyl succinate aluminum, starch octenyl succinate sodium and corn starch at 50°C until there are no particles, and use this as option A for later use.

[0082] S2. Dissolve potassium cetyl phosphate and the anti-allergic soothing composition in water, stir and heat to 80°C, homogenize at high speed for 3 minutes, stir and dissolve evenly, and then use it as item B for later use.

[0083] S3. Mix ethylhexyl methoxycinnamate, ethylhexyl salicylate, hexyl diethylamino hydroxybenzoyl benzoate, ethylhexyl triazine ketone, diisopropyl sebacate, cetearyl alcohol, and pre-emulsified slurry, heat to 80°C, stir to dissolve, and set aside as item C.

[0084] S4. Vacuum the mixing device, draw the C phase into the device, homogenize at high speed for 3 minutes, add the B phase raw material, homogenize at high speed for 1 minute, keep warm and stir at 85℃ for 10 minutes, and then start cooling.

[0085] S5. When the temperature drops to 50℃, add the pre-prepared phase A raw material and stir evenly.

[0086] S6. When the temperature drops below 48°C, add methylene bis-benzotriazolyl tetramethyl butylphenol emulsion, PEG-60 hydrogenated castor oil, prickly pear ferment, and skin conditioning agent, and stir well.

[0087] Comparative Example 1

[0088] This comparative example provides a sunscreen composition, which is expressed in parts by weight (total of 100 parts), and the specific composition is the same as in Table 1.

[0089] This comparative example also provides a method for preparing the sunscreen composition, comprising the following steps:

[0090] S1. Dissolve potassium cetyl phosphate, anti-allergy soothing composition and compound alcohol in water, stir and heat to 85°C, homogenize at high speed for 2 minutes, stir and dissolve evenly, and then use it as item B for later use.

[0091] S2. Mix ethylhexyl methoxycinnamate, ethylhexyl salicylate, hexyl diethylamino hydroxybenzoyl benzoate, ethylhexyl triazine ketone, diisopropyl sebacate, cetearyl alcohol, and pre-emulsified slurry, then heat to 85°C and stir to dissolve. This mixture is then used as item C for later use.

[0092] S3. Vacuum the mixing device, draw the C phase into the device, homogenize at high speed for 4 minutes, add the B phase raw material, homogenize at high speed for 2 minutes, keep it at 80℃ and stir for 15 minutes, then start cooling.

[0093] S5. When the temperature drops to 50℃, add aluminum octenyl succinate, sodium octenyl succinate, and corn starch, and stir until well mixed.

[0094] S6. When the temperature drops below 48°C, add methylene bis-benzotriazolyl tetramethyl butylphenol emulsion, PEG-60 hydrogenated castor oil, prickly pear ferment, and skin conditioning agent, and stir well.

[0095] Comparative Example 2

[0096] This comparative example provides a sunscreen composition in which the amount of complex alcohol is 0, and the other components are consistent with those in Example 1.

[0097] The preparation method of the sunscreen composition is basically the same as that of Comparative Example 1, but no compound alcohol is added in S1.

[0098] Comparative Example 3

[0099] This comparative example provides a sunscreen composition in which 3 parts by weight of butylene glycol and 1 part by weight of 1,2-hexanediol are present, and the other components are consistent with those in Example 1.

[0100] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0101] Comparative Example 4

[0102] This comparative example provides a sunscreen composition in which 2 parts by weight of butylene glycol and 0.5 parts by weight of 1,2-hexanediol are present, and the other components are consistent with those in Example 1.

[0103] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0104] Comparative Example 5

[0105] This comparative example provides a sunscreen composition in which 3.5 parts by weight of butylene glycol and 0.5 parts by weight of 1,2-hexanediol are present, and the other components are consistent with those in Example 1.

[0106] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0107] Comparative Example 6

[0108] This comparative example provides a sunscreen composition in which 0 parts by weight of butylene glycol, 3.5 parts by weight of 1,2-hexanediol, and other components are consistent with those in Example 1.

[0109] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0110] Comparative Example 7

[0111] This comparative example provides a sunscreen composition in which the weight of the pre-emulsified paste is 1.6 parts, the weight of the cetearyl alcohol is 2 parts, and the other components are consistent with those in Example 1.

[0112] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0113] Comparative Example 8

[0114] This comparative example provides a sunscreen composition in which the weight of the pre-emulsified paste is 1.8 parts, the weight of the cetearyl alcohol is 1.7 parts, and the other components are consistent with those in Example 1.

[0115] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0116] Comparative Example 9

[0117] This comparative example provides a sunscreen composition in which the weight of the pre-emulsified paste is 2 parts, the weight of the cetearyl alcohol is 1.9 parts, and the other components are consistent with those in Example 1.

[0118] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0119] Comparative Example 10

[0120] This comparative example provides a sunscreen composition in which the weight of aluminum starch octenyl succinate is 3.5 parts, and the other components are consistent with those in Example 1.

[0121] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Comparative Example 1.

[0122] Comparative Example 11

[0123] This comparative example provides a sunscreen composition in which the weight of starch octenyl succinate aluminum is 3.5 parts, the weight of cetearyl alcohol is 1.1 parts, and the other components are consistent with those in Example 1.

[0124] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Comparative Example 1.

[0125] Comparative Example 12

[0126] This comparative example provides a sunscreen composition in which the weight of starch octenyl succinate aluminum is 2.8 parts, the weight of pre-emulsified slurry is 2.3 parts, and the other components are consistent with those in Example 1.

[0127] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0128] Comparative Example 13

[0129] This comparative example provides a sunscreen composition in which the weight of starch octenyl succinate aluminum is 3.2 parts, the weight of pre-emulsified slurry is 1.9 parts, and the other components are consistent with those in Example 1.

[0130] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0131] Comparative Example 14

[0132] This comparative example provides a sunscreen composition in which the weight of starch octenyl succinate aluminum is 3 parts, starch octenyl succinate sodium is 0 parts, corn starch is 0 parts, and other components are consistent with those in Example 1.

[0133] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Comparative Example 1.

[0134] Comparative Example 15

[0135] This comparative example provides a sunscreen composition in which the weight of starch octenyl succinate aluminum is 0 parts, starch octenyl succinate sodium is 0 parts, corn starch is 3 parts, and other components are consistent with those in Example 1.

[0136] This comparative example also provides a method for preparing the sunscreen composition, which is consistent with Example 1.

[0137] Performance testing methods:

[0138] I. SPF Test Value

[0139] Referring to the "Determination Method of Sunscreen Cosmetics Sunscreen Index (SPF Value)" and the "Square Graph Detection Method for Accurate Determination of Sunscreen Value by Fewer People in Human Sunscreen Pre-test" in the "Cosmetic Safety Technical Specifications" (2015 edition), the SPF value of the fourth well was defined as 51, the increment ratio was set to 1.12 times, and the final SPF value was the average of the tests of 3 volunteers, with the result rounded to one decimal place.

[0140] Appendix Figure 3 The image shows the SPF test results of the sunscreen composition in Example 1. As can be seen from the image, only four holes appear, representing SPF 51.

[0141] Appendix Figure 4 The SPF test chart for the sunscreen composition in Comparative Example 14 shows that all six holes are red, indicating that the SPF is less than 36.3.

[0142] II. Skin feel test

[0143] (1) Refreshing and non-sticky score: Take 10mg of sunscreen composition sample, apply it evenly to the back of the hand, and score it. Use vegetable oil and 95% ethanol as references, with vegetable oil as 0 points and ethanol as 10 points.

[0144] The breakdown is as follows: 1-4 points: noticeably sticky and heavy on the skin; 5-6 points: relatively sticky and heavy on the skin; 7-8 points: slightly sticky and not heavy on the skin; 9-10 points: refreshing and not heavy on the skin.

[0145] (2) Quick-drying film-forming score: Take 10mg of sunscreen composition sample, apply it evenly to the back of the hand, and after applying it evenly, count down for ten seconds. Then use the back of the other hand to stick it to see if there is any sticky feeling. If it is completely dry and there is no sticky feeling, it is 10 points. Using syrup as a reference, the stickiness of syrup is 0 points.

[0146] The criteria are as follows: 1-4 points: sticky and can even stick to the back of the other hand; 5-6 points: sticky but will not stick to the back of the other hand; 7-8 points: slightly sticky; 9-10 points: dry and smooth.

[0147] III. Stability Testing

[0148] The samples were subjected to a 2-day cycle of hot and cold treatment. On the first day, the samples were stored in a -18℃ incubator, and on the second day, they were stored in a 48℃ incubator. After alternating storage for 14 days, the samples were removed and the emulsion was observed to see if its appearance changed after the samples were brought back to room temperature.

[0149] Appendix Figure 1 The image shows the sunscreen composition of Example 1 after stability testing, indicating no abnormalities. (Attached) Figure 2 The image shows the actual product of the composition of Comparative Example 6 after testing, which clearly shows its oil exudation phenomenon.

[0150] IV. Viscosity Test

[0151] The viscosity was measured using an ND-5S viscosity meter, and the unit of viscosity is mPa·s.

[0152] The performance test results are shown in Table 4. [Note: If the product's stability fails the test, or if there is demulsification during sampling / sedimentation / demulsification after sampling and subsequent settling, the data are invalid, indicating that the product is unqualified.]

[0153] Table 4

[0154]

[0155]

[0156] V. Human safety:

[0157] Test substance: The sunscreen composition of Example 1.

[0158] Negative control: Blank control.

[0159] Participants: A total of 30 participants, including 6 males and 24 females, aged 22 to 60 years, with a mean age of 46.07 ± 10.80 years, meeting the criteria for voluntary participation.

[0160] Patch test method: Select qualified patch test equipment and use the closed patch test method. Place about 0.020g to 0.025g of the test substance in the patch test device and apply it to the back of the subject with hypoallergenic adhesive tape. Remove the test substance after 24 hours. Observe the skin reaction at 0.5, 24 and 48 hours after removal. Record the results according to the skin reaction grading standard in the "Cosmetic Safety Technical Specifications" (2015 edition).

[0161] The results showed that none of the 30 participants experienced adverse skin reactions.

[0162] Analysis: As shown in the table above, by optimizing the types and relative amounts of the formulation components and optimizing the product preparation method, the composition of this application has excellent sun protection effect (SPF value ≥50, PFA value ≥16), low viscosity, refreshing and non-sticky feel, quick-drying film formation, and high stability.

[0163] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0164] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high SPF sunscreen composition with a light and thin skin feel, characterized in that, The components of the high-multiple sunscreen composition by weight parts include: sunscreen 17-35 parts, skin feel adjusting composition 1-11 parts, pre-emulsified slurry 2.1-4 parts, emulsifier 1.5-5 parts, emulsion stabilizer 0.4-2.2 parts, skin conditioning agent 2-7 parts, and water to make up the balance to 100 parts; The sunscreen composition further comprises 2-5 parts of complex alcohol; the complex alcohol comprises butanediol and 1,2-hexanediol in a ratio of 3:0.5-1; The ratio of the use amounts of aluminum starch octenylsuccinate, sodium starch octenylsuccinate and corn starch in the skin feel adjusting composition is 3-5:1-3:1-3; The emulsifier comprises cetyl stearyl alcohol, diisopropyl sebacate and PEG-60 hydrogenated castor oil, and the ratio of the use amounts of the cetyl stearyl alcohol, diisopropyl sebacate and PEG-60 hydrogenated castor oil is 1.3-1.7:1-1.5:0.5-0.8; The sunscreen composition further comprises 0.5-2 parts of anti-allergic soothing composition; The preparation method of the high-multiple sunscreen composition comprises the following steps:

2. The high factor sunscreen composition according to claim 1, wherein, The sunscreen agent comprises at least one of UVA absorber, UVB absorber, broad-spectrum sunscreen and biological sunscreen; the UVA absorber comprises at least one of butyl methoxydibenzoylmethane and diethylamino hydroxybenzoyl ethyl benzoate, the UVB absorber comprises at least one of methoxyethyl hydrocinnamate, ethylhexyl salicylate, homosalate and octocrylene, the broad-spectrum sunscreen comprises at least one of bis-ethylhexyloxyphenol methoxyphenyl triazine and methylene salicylic acid tri-siloxane, and the biological sunscreen comprises at least one of roselle ferment, resveratrol, grape seed extract, pomegranate extract, aloe extract, oat extract and phycocyanin.

3. The high factor sunscreen composition according to claim 1, wherein, The sunscreen agent comprises UVA absorber, UVB absorber, broad-spectrum sunscreen and biological sunscreen in a ratio of 3-7:9-15:1-5:1-3.

4. The high factor sunscreen composition according to claim 1, wherein, The components of the pre-emulsified slurry include sodium acrylate / sodium acryloyldimethyl taurate copolymer, polysorbate-80, sorbitan oleate, isohexadecane, xanthan gum and water in a ratio of 0.35-1.2:0.05-0.4:0.01-0.1:0.1-0.8:0.05-0.3:0.2-1.0, respectively.

5. The high factor sunscreen composition according to claim 1, wherein The emulsion stabilizer comprises potassium cetyl phosphate.

6. The high factor sunscreen composition according to claim 1, wherein, The preparation method of the high-multiple sunscreen composition comprises the following steps: S1, the skin feel adjusting composition is fully swollen by complex alcohol to be free of particles, which is used as A item for standby; S2, the emulsion stabilizer and the anti-allergic soothing composition are mixed, stirred and heated to 80-90℃, and then high-speed homogenized to be used as B item for standby; S3, the UVA absorber, the UVB absorber, the broad-spectrum sunscreen, cetyl stearyl alcohol, diisopropyl sebacate and the pre-emulsified slurry are mixed, stirred and heated to 80-88℃, and then stirred and dissolved to be used as C item for standby; S4, B phase and C phase are mixed, high-speed homogenized, and stirred at 80-88℃ for 10-30 min; S5, the temperature is lowered to 50℃, A phase is added and stirred uniformly. S6, cooling to 48℃ or below, then adding the remaining components.

7. Use of the high-fold sunscreen composition according to any one of claims 1 to 6 for the manufacture of a sunscreen cosmetic.

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