A sunscreen lotion and its preparation method

Abstract

This application discloses a sunscreen lotion comprising: (A) an emulsifier, (B) an oil phase, (C) an aqueous phase, (D) an aqueous sunscreen agent, (E) an active ingredient, and (F) a preservative. By weight percent, the lotion comprises: 1-5 parts of the (A) emulsifier, 22-30 parts of the (B) oil phase, 45-60 parts of the (C) aqueous phase, 10-20 parts of the (D) aqueous sunscreen agent, 1-5 parts of the (E) active ingredient, and 0.1-1 parts of the (F) preservative. This sunscreen lotion, by effectively controlling the content of the sunscreen agent and selecting other ingredients in the sunscreen product, improves the sun protection efficacy of the sunscreen product, resulting in a sunscreen lotion with good safety and high stability. Furthermore, this lotion has a good effect on improving skin elasticity.

Description

Technical Field

[0001] This invention relates to the field of cosmetics, specifically to a sunscreen lotion and its preparation method. Background Technology

[0002] Ultraviolet (UV) radiation is an exogenous factor that causes photoaging of the skin. Skin exposed to UV radiation for extended periods can become loose and dull. With major brands expanding their presence in the sunscreen market and consumers becoming more aware of sun protection, the market demand for high SPF sunscreens is increasing. Typically, to achieve a high SPF, sunscreens require the addition of large amounts of chemical or physical sunscreens. However, the addition of excessive sunscreens can lead to poor skin feel, reduced safety, and decreased stability.

[0003] Most sunscreens on the market currently only offer protection against ultraviolet (UV) radiation, which is a relatively simple function. Since sunscreens are primarily used outdoors, UV exposure increases free radicals in the skin. These free radicals then affect metalloproteinases, degrade collagen, and cause a decrease in skin elasticity.

[0004] Patent document 1 (CN 110051617 A) discloses a high SPF sunscreen lotion and its preparation method, which studies the synergistic effect of affinity and long-lasting effect. It includes the following raw materials: 12 parts water, 0.05 parts ethylhexyl methoxycinnamate, 0.02 parts bis-ethylhexyloxyphenol methoxyphenyl triazine, 0.02 parts dioctyl carbonate, 0.02 parts coconut oil alcohol-caprylate / caprate, 0.02 parts octocrylene, 0.35 parts propylene glycol, 0.02 parts diethylamino hydroxybenzoyl hexyl benzoate, 3 parts glycerin, 0.02 parts methylene bis-benzotriazolyl tetramethylbutylphenol, and 0.03 parts decyl glucoside. The ingredients include 0.3 parts propylene glycol, 0.15 parts xanthan gum, 0.15 parts sucrose polystearate, 0.15 parts cetyl stearate, 0.15 parts butylene glycol, 0.03 parts ethylhexyl triazine, 0.03 parts phenoxyethanol, 0.03 parts octyl glycol, 0.03 parts sodium polyacrylate, 0.03 parts tocopheryl acetate, 0.02 parts bisabolol, 0.02 parts sodium stearoyl glutamate, 0.02 parts polydimethylsiloxane, 0.02 parts sodium hyaluronate, 0.02 parts tetrasodium EDTA, 0.03 parts glucomannan, 0.07 parts kombucha film dispersion, and 0.02 parts microcrystalline cellulose. While this sunscreen lotion objectively meets certain sun protection requirements, the emulsion's stability is relatively poor, and its effects on skin elasticity have not been studied. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems existing in the prior art.

[0006] This invention provides a sunscreen lotion comprising: (A) an emulsifier, (B) an oil phase, (C) an aqueous phase, (D) an aqueous sunscreen agent, (E) an active ingredient, and (F) a preservative, wherein...

[0007] The emulsifier in (A) above is selected from one or more of the group consisting of sucrose ester emulsifiers, glucosinolate emulsifiers, olive ester emulsifiers, phosphate ester emulsifiers, stearoyl emulsifiers, and lecithin emulsifiers.

[0008] The above-mentioned (E) active substances include *Chlorella vulgaris* extract, *Cladosporium cladosporum* extract, *Lactobacillus sacchariformis* extract, trehalose, glucan, and *Sclerotium sclerotium* gum.

[0009] The weight ratio of the emulsifier (A) to the active substance (E) is (1-5):(1-5).

[0010] In a preferred embodiment of the present invention, the emulsifier in (A) is selected from sucrose ester emulsifiers and / or glucosinolate emulsifiers.

[0011] In a preferred embodiment of the present invention, the sucrose ester emulsifier is selected from sucrose polystearate, cetyl palmitate, hydrogenated polyisobutylene, cetearyl alcohol, and unsaponifiables of olive oil; the glucosinolate emulsifier is selected from cetearyl glucoside, cetearyl alcohol, arachidonic acid, behenyl alcohol, arachidonic acid glucoside, C14-22 alcohol, C12-20 alkyl glucoside, cocoyl alcohol, cocoyl glucoside, and cocoyl glucoside.

[0012] In a preferred embodiment of the present invention, the sucrose ester emulsifier is a mixture of sucrose polystearate and cetyl palmitate and / or a mixture of cetearyl alcohol and cetearyl glucoside.

[0013] In a preferred embodiment of the present invention, the oil phase (B) comprises diethylamino hydroxybenzoyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, dioctyl carbonate, ethylhexyl triazine ketone, polydimethylsiloxane, phenyl polytrimethylsiloxane, ethylhexyl methoxycinnamate, butylated hydroxytoluene, cyclopentamethoxydimethylsiloxane, polymethylsilsesquioxane, tocopheryl acetate, coconut oil alcohol-caprylate / decanoate, hydrogenated polydecene, caprylic / decanoic acid triglyceride, cyclohexylsiloxane, isononyl isononanoate, octylmethylsiloxane, and glycerol. The above (C) aqueous phase includes water, sodium stearoyl glutamate, sodium polyacrylate, disodium EDTA, propylene glycol, tetrasodium EDTA, sodium polyacrylamide dimethyl taurate, sodium acrylate / acryloyl nitrogen copolymer, sodium acrylate / C10-30 alcohol acrylate crosspolymer, carbomer, sodium carbomer, glycerin, and butylene glycol; the above (D) aqueous phase sunscreen agent includes methylene bis-benzotriazolyl tetramethyl butylphenol, water, decyl glucoside, propylene glycol, xanthan gum, and phenylbenzimidazole sulfonic acid.

[0014] In a preferred embodiment of the present invention, the oil phase (B) is selected from one or more of the following: diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, dioctyl carbonate, ethylhexyl triazine ketone, a mixture of ethylhexyl methoxycinnamate and butylated hydroxytoluene, cyclopentamethoxydimethylsiloxane, polymethylsilsesquioxane, and tocopheryl acetate; the aqueous phase (C) is selected from one or more of the following: sodium stearoyl glutamate, sodium polyacrylate, disodium EDTA, glycerin, and butanediol; and the aqueous sunscreen agent (D) is selected from one or more of the following: methylene bis-benzotriazolyl tetramethylbutylphenol, decyl glucoside, propylene glycol, and xanthan gum.

[0015] In a preferred embodiment of the present invention, the composition, by weight percent, includes: 1 to 5 parts of the emulsifier (A), 22 to 30 parts of the oil phase (B), 45 to 60 parts of the aqueous phase, 10 to 20 parts of the aqueous sunscreen agent (D), 1 to 5 parts of the active substance, and 0.1 to 1 part of the preservative.

[0016] In a preferred embodiment of the present invention, the following components are included, by weight percent: 1-5% of a mixture of sucrose polystearate and cetyl palmitate and / or a mixture of cetearyl alcohol and cetearyl glucoside; 2-5% of hexyl diethylaminobenzoylbenzoate; 1-3% of bis-ethylhexyloxyphenol methoxyphenyl triazine; 3-7% of dioctyl carbonate; 1-3% of ethylhexyl triazine ketone; 5-10% of a mixture of ethylhexyl methoxycinnamate and butylated hydroxytoluene; and 3-7% of cyclopentamethoxydimethylsiloxane. The following ingredients are present: 0.1-0.5% polymethylsilsesquioxane, 0.1-0.5% tocopheryl acetate, 0.1-0.5% sodium stearoyl glutamate, 0.3-0.7% sodium polyacrylate, 0.01-0.1% disodium EDTA, 1-5% glycerol, 1-5% butylene glycol, 7-9% of a mixture of methylene bis-benzotriazolyltetramethylbutylphenol and decyl glucoside, propylene glycol, and xanthan gum, 1-5% chondroxylin and eosin extract, 0.1%-1% of a mixture of phenoxyethanol and ethylhexylglycerin, with the balance being water.

[0017] In a preferred embodiment of the present invention, the following components are included, by weight percent: 1-5% of a mixture of sucrose polystearate and cetyl palmitate and / or a mixture of cetearyl alcohol and cetearyl glucoside; 3.5% of hexyl diethylaminobenzoylbenzoate; 1.5% of bis-ethylhexyloxyphenol methoxyphenyl triazine; 5% of dioctyl carbonate; 1.5% of ethylhexyl triazine ketone; and 9% of a mixture of ethylhexyl methoxycinnamate and butylated hydroxytoluene. The composition includes 5% cyclopentamethoxysiloxane, 0.5% polymethylsilsesquioxane, 0.3% tocopheryl acetate, 0.3% sodium stearoyl glutamate, 0.5% sodium polyacrylate, 0.05% disodium EDTA, 2% glycerol, 3% butylene glycol, 7.5% a mixture of methylene bis-benzotriazolyltetramethylbutylphenol and decyl glucoside, propylene glycol, and xanthan gum, 2% chondroxylin and eosin extract, 0.5% a mixture of phenoxyethanol and ethylhexylglycerin, and the balance being water.

[0018] Furthermore, the present invention also provides a method for preparing a sunscreen lotion, the method comprising the following steps:

[0019] (1) Heat a portion of the (B) oil phase to 80-100°C and mix it evenly to obtain phase A1;

[0020] (2) Add emulsifier (A) to phase A1, heat to 80-100℃, mix evenly to obtain phase A2;

[0021] (3) Weigh another part (B) of the oil phase, add phase A2 to it, and stir to obtain phase A;

[0022] (4) Prepare (C) aqueous phase and heat it to 80-100℃ to obtain phase B;

[0023] (5) Mix phase A and phase B, and stir homogenously at 5000rpm-20000rpm for 5min-30min. After emulsification, cool to 30-50℃ to obtain phase C.

[0024] (6) Add (D) aqueous sunscreen, (E) active substance and (F) preservative to phase C in sequence to obtain the final product.

[0025] Invention Effects

[0026] The sunscreen lotion of the present invention, under the premise of effectively controlling the content of sunscreen agents, improves the sun protection efficacy of sunscreen products by selecting other ingredients in the sunscreen product, thereby obtaining a sunscreen lotion with good safety and high stability, and the lotion has a good effect on improving skin elasticity. Detailed Implementation

[0027] The technical solutions in this application are clearly described below. Obviously, the embodiments described herein are only some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application are within the scope of protection of this application.

[0028] The sunscreen lotion of the present invention comprises the following components: (A) emulsifier, (B) oil phase, (C) aqueous phase, (D) aqueous sunscreen agent, (E) active substance, and (F) preservative.

[0029] On the other hand, the emulsifier in (A) above comprises one or more emulsifiers. Specifically, the emulsifier is selected from sucrose ester emulsifiers, glucosinolate emulsifiers, olive ester emulsifiers, phosphate ester emulsifiers, stearoyl emulsifiers, lecithin emulsifiers, etc., but is not limited thereto. Furthermore, as a preferred embodiment of the present invention, the emulsifier is selected from one or two of sucrose ester emulsifiers and glucosinolate emulsifiers, but is not limited thereto.

[0030] As the aforementioned sucrose ester emulsifiers, they can be selected from sucrose polystearate, cetyl palmitate, hydrogenated polyisobutylene, cetearyl alcohol, unsaponifiables of olive oil, etc., or combinations of these substances, but are not limited to these. Specific examples include, for instance, Eumulgin Sucro from BASF (China) Co., Ltd. SucroPlus, etc., but not limited to these.

[0031] As the above-mentioned glucosinolate emulsifiers, they can be selected from cetearyl glucoside, cetearyl alcohol, arachidonic acid, behenyl alcohol, arachidonic acid glucoside, C14-22 alcohol, C12-20 alkyl glucoside, cocoyl alcohol, cocoyl glucoside, cocoyl glucoside, etc., or combinations of these substances, but are not limited to them. As specific examples, trade names such as Montanov 202, Montanov 68MB, Montanov L, Montanov 82, etc. can be listed.

[0032] Examples of olive ester emulsifiers include, for example, Olivm1000 from B&T in Italy; examples of phosphate ester emulsifiers include Sensanov WR from SEPPIC in France, NE401A from Lipo in the United States, and NE410A from Soliance; examples of stearoyl emulsifiers include Nikkomulese 41 from Nikko in Japan and Eumulgin SG from BASF; and examples of lecithin emulsifiers include Nikkomulese LC from Nikko in Japan, Prolipid 141 from ISP in the United States, and DS-HPC70S from Doosan in South Korea.

[0033] In all embodiments of the present invention, the total content of the emulsifier (A) above is preferably selected from the range of 1-5% by weight, more preferably from the range of 1-4% by weight, and most preferably from the range of 2-3% by weight, based on the total weight of the sunscreen lotion.

[0034] On the other hand, the sunscreen lotion of the present invention comprises at least one or more (B) oil phases, specifically, the oil phase components are selected from one or more of the following: diethylamino hydroxybenzoyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, dioctyl carbonate, ethylhexyl triazine ketone, polydimethylsiloxane, phenyl polytrimethylsiloxane, ethylhexyl methoxycinnamate, butylated hydroxytoluene, cyclopentamethoxydimethylsiloxane, polymethylsilsesquioxane, tocopheryl acetate, cocoyl alcohol-caprylate / capric acid ester, hydrogenated polydecene, caprylic / capric acid triglyceride, cyclohexylsiloxane, isononyl isononanoate, octylmethylsiloxane, and triglyceride (ethylhexanoate), but are not limited thereto. Furthermore, as one embodiment, the above-mentioned oil phase is selected from hexyl diethylaminobenzoylbenzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, dioctyl carbonate, ethylhexyl triazine ketone, ethylhexyl methoxycinnamate, butylated hydroxytoluene, cyclopentamethoxydimethylsiloxane, polymethylsilsesquioxane, and tocopherol acetate. More preferably, the above-mentioned oil phase is a composition of these substances. Among these substances, a portion can be combined to form a composition, and another portion can be combined to form a composition. As another embodiment, the oil phase (1) is selected from one or more of hexyl diethylaminobenzoylbenzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, dioctyl carbonate, ethylhexyl triazine ketone, ethylhexyl methoxycinnamate, and butylated hydroxytoluene; the oil phase (2) is selected from one or more of cyclopentamethoxydimethylsiloxane, polymethylsilsesquioxane, and tocopherol acetate.

[0035] In all embodiments of the present invention, the total content of the oil phase, based on the total weight of the sunscreen lotion, is preferably selected from 22 to 30% by weight, more preferably from 22 to 28% by weight, and most preferably from 25 to 28% by weight.

[0036] In all embodiments of the present invention, the sunscreen lotion of the present invention contains at least 3 to 10 kinds, more preferably at least 5 to 10 kinds, and most preferably at least 8 to 10 different oil phases.

[0037] In a particularly preferred embodiment, the oil phase of the present invention comprises an oil phase (1) and an oil phase (2). Based on the total weight of the sunscreen lotion, the total content of the oil phase component (1) is preferably selected from 18 to 25% by weight, more preferably from 18 to 24% by weight, and most preferably from 20 to 22% by weight. The total content of the oil phase component (2) is preferably selected from 4 to 8%, more preferably from 5 to 8% by weight, and most preferably from 5 to 6% by weight.

[0038] In a particularly preferred embodiment, the oil phase (1) comprises hexyl diethylamino hydroxybenzoyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, dioctyl carbonate, ethylhexyl triazine ketone, and ethylhexyl methoxycinnamate; the oil phase (2) comprises cyclopentamethoxydimethylsiloxane, polymethylsilsesquioxane, and tocopherol acetate.

[0039] On the other hand, the sunscreen lotion of the present invention comprises at least one or more (C) aqueous phases. Specifically, the aqueous phase is selected from one or more of water, sodium stearoyl glutamate, sodium polyacrylate, disodium EDTA, propylene glycol, tetrasodium EDTA, sodium polyacrylamide dimethyl taurate, sodium acrylate / acryloyl nitrogen copolymer, sodium acrylate / C10-30 alcohol acrylate crosspolymer, carbomer, sodium carbomer, glycerin, and butanediol, but is not limited thereto. More advantageously, the aqueous phase is selected from water, sodium stearoyl glutamate, sodium polyacrylate, disodium EDTA, glycerin, and butanediol. More preferably, the aqueous phase is a composition of these substances.

[0040] In all embodiments of the present invention, the total content of the aqueous phase, based on the total weight of the sunscreen lotion, is preferably selected from the range of 45 to 60% by weight, more preferably from 50 to 60% by weight, and most preferably from 50 to 55% by weight.

[0041] On the other hand, the aqueous sunscreen agent described in (D) is selected from one or more of methylene bis-benzotriazolyltetramethylbutylphenol, water, decyl glucoside, propylene glycol, xanthan gum, and phenylbenzimidazole sulfonic acid, but is not limited thereto. More advantageously, the aqueous sunscreen agent is selected from methylene bis-benzotriazolyltetramethylbutylphenol, water, decyl glucoside, propylene glycol, and xanthan gum. Even more preferably, the aqueous sunscreen agent is a composition of these substances; BASF (China) Co., Ltd. can be cited as a specific example. M, but not limited to this.

[0042] In all embodiments of the present invention, the total content of the aqueous sunscreen agent, based on the total weight of the sunscreen lotion, is preferably selected from the range of 10 to 20% by weight, more preferably from the range of 15 to 18% by weight. The substances contained in the aqueous sunscreen agent other than water, based on the total weight of the sunscreen lotion, are preferably selected from the range of 5 to 10% by weight, more preferably from the range of 7 to 10% by weight.

[0043] On the other hand, the aforementioned (E) active substance is selected from one or more of the following: *Chlorella vulgaris* extract, *Cladosporium cladoceratum* extract, *Laminaria japonica* extract, trehalose, dextran, and sclerotium gum, but is not limited thereto. More advantageously, the aforementioned active substance is selected from *Chlorella vulgaris* extract and sclerotium gum, and even more preferably from *Chlorella vulgaris* extract.

[0044] According to the present invention, the sunscreen lotion of the present invention may contain other cosmetic active ingredients commonly used in topical sunscreen lotions. Exemplary active ingredients include starfish algae extract, kelp extract, trehalose, glucan, etc., but are not limited thereto.

[0045] In all embodiments of the present invention, the total content of the above-mentioned active substances is preferably selected from 1 to 5% by weight, more preferably 1 to 4% by weight, and most preferably 1 to 2% by weight, based on the total weight of the sunscreen lotion.

[0046] The weight ratio of the emulsifier (A) to the active substance (E) is (1-5):(1-5), (2-5):(1-5), (2-5):(1-4), (2-5):(1-2).

[0047] On the other hand, the preservative described above (F) is selected from one or more of phenoxyethanol, ethylhexylglycerin, capryloyl hydroxamic acid, p-hydroxyacetophenone, benzyl alcohol, pentylene glycol, chlorphenesin, sodium benzoate, and potassium sorbate, but is not limited thereto. Furthermore, more advantageously, the preservative described above is selected from a mixture of phenoxyethanol and ethylhexylglycerin.

[0048] In all embodiments of the present invention, the total content of the preservatives, based on the total weight of the sunscreen lotion, is preferably selected from 0.1 to 1% by weight, more preferably from 0.2 to 0.8% by weight, and most preferably from 0.5 to 0.6% by weight.

[0049] In a particularly advantageous embodiment, the sunscreen lotion, based on its total weight, contains 1-5% of a mixture of sucrose polystearate and cetyl palmitate and / or a mixture of cetearyl alcohol and cetearyl glucoside, 2-5% of hexyl diethylaminobenzoylbenzoate, 1-3% of bis-ethylhexyloxyphenol methoxyphenyl triazine, 3-7% of dioctyl carbonate, 1-3% of ethylhexyl triazine ketone, 5-10% of a mixture of ethylhexyl methoxycinnamate and butylated hydroxytoluene, and 3-7% of cyclopentamethoxydimethylsiloxane. The composition includes: 0.1-0.5% polymethylsilsesquioxane, 0.1-0.5% tocopheryl acetate, 0.1-0.5% sodium stearoyl glutamate, 0.3-0.7% sodium polyacrylate, 0.01-0.1% disodium EDTA, 1-5% glycerol, 1-5% butylene glycol, 7-9% a mixture of methylene bis-benzotriazolyltetramethylbutylphenol and decyl glucoside, propylene glycol, and xanthan gum, 1-5% chondroxylin and eosin extract, 0.1%-1% a mixture of phenoxyethanol and ethylhexylglycerin, with the balance being water. However, this composition is not limited to these components.

[0050] The sunscreen lotion of the present invention may also contain other conventional cosmetic adjuvants and additives, such as antioxidants, fatty substances / oils, silicones, thickeners, emulsifiers, defoamers, beautifying components such as fragrances, emulsifiers, fillers, masking agents, anionic, cationic, nonionic or amphoteric polymers or mixtures thereof, propellants, acidifiers or alkalizers, dyes, colorants, abrasives, adsorbents, chelating agents and / or masking agents, essential oils, skin receptors, astringents, pigments or any other ingredients commonly formulated into such compositions.

[0051] The sunscreen emulsion of the present invention is prepared by the following method: 1) preparing an oil phase mixture, adding an emulsifier to the oil phase mixture and mixing to obtain phase A; 2) preparing an aqueous phase mixture phase B; 3) mixing phase A and phase B and emulsifying to obtain phase C; 4) adding active substances to phase C and stirring evenly to obtain the sunscreen emulsion.

[0052] In a particularly advantageous embodiment, 1) Preparing phase A: A portion of the oil phase mixture is prepared in advance and heated uniformly to obtain phase A1. Then, a pre-prepared emulsifier is added to the oil phase mixture and heated to obtain phase A2. Next, another portion of the oil phase mixture is added to phase A2 to obtain phase A; 2) Preparing phase B: An aqueous phase is prepared, thoroughly stirred and mixed, and heated to obtain phase B; 3) Preparing phase C: Phase A and phase B are mixed and stirred for a long time. After emulsification, the mixture is stirred and cooled to obtain phase C; the final product is obtained; 4) Active substances, preservatives, etc. are added to phase C and stirred uniformly to obtain a sunscreen emulsion. However, the present invention is not limited to these steps.

[0053] In a particularly advantageous embodiment, phase A is prepared by: preparing a portion of an oil phase mixture and heating it uniformly to obtain phase A1, for example, mixing diethylaminobenzoyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, dioctyl carbonate, ethylhexyl triazine ketone, ethylhexyl methoxycinnamate, etc., and heating it to a temperature range of 65-100°C, preferably 75-90°C, more preferably 85°C; then, mixing a pre-prepared emulsifier, such as sucrose polystearate, cetyl palmitate, etc., and heating the mixture to a temperature range of 65-100°C, preferably 75-90°C, more preferably 85°C, and then mixing it with the oil phase mixture to obtain phase A2; next, mixing another portion of the oil phase, such as cyclopentamethoxydimethylsiloxane, polymethylsilsesquioxane, tocopheryl acetate, uniformly, and then adding it to phase A2 to obtain phase A3; 2) Preparing phase B: preparing Aqueous phase: The aqueous phase is thoroughly stirred and mixed, for example, water, sodium stearoyl glutamate, sodium polyacrylate, EDTA-2NA, glycerin, butylene glycol, etc. are mixed and heated to a temperature range of 65-100℃, preferably 75-90℃, more preferably 85℃, to obtain phase B; 3) Prepare phase C: Phase A and phase B are mixed and homogenized by stirring for a long time, wherein the homogenization rate is 5000rpm-20000rpm and the homogenization time is 5min-15min. After emulsification, the mixture is stirred and cooled to 30-50℃, preferably 40-50℃, to obtain phase C; Obtain the final product: 4) Add aqueous sunscreen agents, active substances, preservatives, etc. to phase C, for example, add methylene bis-benzotriazolyl tetramethylbutylphenol, decyl glucoside, propylene glycol, xanthan gum, chondrus crispus extract, kelp extract, phenoxyethanol, ethylhexylglycerin, etc., and stir evenly to obtain sunscreen emulsion. However, the present invention is not limited to the above steps.

[0054] The present invention will be further illustrated by the following embodiments, but the present invention is not limited to these embodiments.

[0055] Example

[0056] Example 1

[0057] The preparation method of the sunscreen lotion in Example 1 includes the following steps:

[0058] 1) Accurately weigh diethylaminohydroxybenzoylhexyl benzoate (Uvinul A Plus Granular) and bis-ethylhexyloxyphenol methoxyphenyl triazine ( S), dioctyl carbonate ( CC), ethylhexyltriazine ( T 150), a mixture of ethylhexyl methoxycinnamate and butylated hydroxytoluene ( After mixing with MC 80, heat to 85°C and mix thoroughly to obtain phase A1.

[0059] 2) Accurately weigh the emulsifier. Sucro Plus (manufacturer: BASF (China) Co., Ltd., containing 90% sucrose polystearate and 10% cetyl palmitate) was added to phase A1, heated to 85°C, and mixed evenly to obtain phase A2.

[0060] 3) Accurately weigh cyclopentamethoxydimethylsiloxane (KF995), polymethylsilsesquioxane (KMP590), and tocopheryl acetate (DL-alpha-Tocopheryl Acetate), stir and disperse evenly, then add phase A2, stir and disperse evenly to obtain phase A;

[0061] 4) Accurately weigh water and sodium stearoyl glutamate ( SG), sodium polyacrylate ( SP), EDTA-disodium (EDTA-disodium ethylenediaminetetraacetate), glycerol (MOON K, GLYCERIN, USP, FCC), and 1,3-Butylene Glycol were stirred until homogeneous and then heated to 85°C to obtain phase B.

[0062] 5) Add phase A to phase B, stir rapidly, and then start homogenization at a speed of 10,000 rpm for 8 minutes to obtain phase C.

[0063] 6) After emulsification is complete, turn on the stirring and cool down to 50°C;

[0064] 7) M (BASF (China) Co., Ltd., containing 50% methylene bis-benzotriazolyltetramethylbutylphenol, 41.3% water, 8% decyl glucoside, 0.4% propylene glycol, and 0.3% xanthan gum) is mixed with water to form phase D;

[0065] 8) Add phase D, cruciferous chamomile extract, and euxyl PE 9010 (manufacturer: Ashland LLC, 90% phenoxyethanol, 10% ethylhexylglycerin) to phase C in sequence and stir until well mixed;

[0066] 9) Discharge.

[0067] Example 2

[0068] The emulsifier content was changed to 3% by weight. Otherwise, the other process conditions and ratios were the same as in Example 1, and a sunscreen emulsion was obtained.

[0069] Example 3

[0070] The emulsifier content was changed to 4.5% by weight. Otherwise, the other process conditions and ratios were the same as in Example 1, and a sunscreen emulsion was obtained.

[0071] Example 4

[0072] The content of the active ingredient, *Corydalis rubra* extract, was changed to 1% by weight. Otherwise, the other process conditions and ratios were the same as in Example 1, and a sunscreen lotion was obtained.

[0073] Example 5

[0074] The emulsifier was changed to MONTANOV 68MB (SEPPIC, France, containing 80% cetearyl alcohol and 20% cetearyl glucoside). All other process conditions and ratios were the same as in Example 1, and a sunscreen emulsion was obtained.

[0075] Example 6

[0076] Except for changing the active ingredient to sclerotium gum, all other process conditions and ratios are the same as in Example 5, resulting in a sunscreen lotion.

[0077] Example 7

[0078] Used as an emulsifier Sucro Plus 1% by weight and MONTANOV 68MB 1% by weight, except for other process conditions and proportions, are the same as in Example 1 to obtain a sunscreen lotion.

[0079] Comparative Example 1

[0080] SIMUSOL 165 (SEPPIC, France, containing 50% glyceryl stearate and 50% PEG-100 stearate) was used as the emulsifier. Other than that, the process conditions and proportions were the same as in Example 1, and a sunscreen emulsion was obtained.

[0081] Comparative Example 2

[0082] Cetearyl alcohol was used as an emulsifier. All other process conditions and ratios were the same as in Example 1, and a sunscreen emulsion was obtained.

[0083] Comparative Example 3

[0084] Used as an emulsifier Sucro Plus 1 wt% and SIMUSOL 165 1 wt%, except that other process conditions and ratios are the same as in Example 1, to obtain a sunscreen lotion.

[0085] Comparative Example 4

[0086] SIMUSOL 165 2% by weight was used as the emulsifier, and Sclerotium sclerotium gum was used as the active ingredient. Other than that, the process conditions and proportions were the same as in Example 1, and a sunscreen lotion was obtained.

[0087] Comparative Example 5

[0088] The active ingredient, kelp extract, was used at 2% by weight, and the amount of emulsifier was different. Otherwise, the other process conditions and ratios were the same as in Example 1, and a sunscreen lotion was obtained.

[0089] Comparative Example 6

[0090] SIMUSOL 165 was used as an emulsifier at 2% by weight, and kelp extract was used as an active ingredient at 2% by weight. Otherwise, the other process conditions and proportions were the same as in Example 1, and a sunscreen lotion was obtained.

[0091] Comparative Example 7

[0092] Cetearyl alcohol (3% by weight) was used as an emulsifier, and kelp extract (2% by weight) was used as an active ingredient. Otherwise, the process conditions and proportions were the same as in Example 1, and a sunscreen lotion was obtained.

[0093] Comparative Example 8

[0094] As emulsifiers, 1% by weight of SIMUSOL 165 and 1% by weight of cetearyl alcohol were used, and 2% by weight of palmate seaweed extract was used as the active ingredient. Apart from this, the other process conditions and proportions were the same as in Example 1, and a sunscreen lotion was obtained.

[0095] Comparative Example 9

[0096] SIMUSOL 165 was used as an emulsifier at 3% by weight, and kelp extract was used as an active ingredient at 1% by weight. Otherwise, the other process conditions and proportions were the same as in Example 1, and a sunscreen lotion was obtained.

[0097] The composition of the sunscreen lotions obtained in each embodiment is shown in Table 1 below:

[0098] Table 1

[0099]

[0100] Product effectiveness test

[0101] 1) Stability and uniformity tests

[0102] To determine the stability and temperature uniformity of the products obtained in Examples 1-7 and Comparative Examples 1-9 of this invention, a Turbiscan Lab stability analyzer (Formulaction, France) was used to evaluate their stability and uniformity. This instrument can determine the stability of the product in a short time. Specifically, it uses an 880nm near-infrared light source and reflects the stability of the sample by detecting changes in the intensity of the projected and backscattered light. The Turbiscan Lab stability analyzer can determine the aggregation and flocculation of dispersed particles in the system in a short time and can reflect changes in the internal structure of the emulsion to a certain extent. The experimental conditions were heat-resistant (40℃, 24h) and freeze-thaw (-20℃, 24h). A ΔBS absolute value < 5% indicates absolute stability; a ΔBS absolute value of 5% < ΔBS < 8% indicates moderate stability; and a ΔBS absolute value > 8% indicates instability. The TSI index is a stability kinetic parameter; the smaller the index, the better the product stability. A larger uniformity index indicates poorer sample uniformity, and a smaller uniformity index indicates better sample uniformity.

[0103] 2) Sun Protection Factor Test

[0104] Sun Protection Factor (SPF) is an important indicator for sunscreen skincare products, affecting product quality and usability. The UV-2000S sun protection factor tester can quickly measure the SPF of cosmetics. PA value indicates the level of protection against UVA. Equal amounts of samples from Examples 1-7 and Comparative Examples 1-9 were taken and evenly applied to a substrate. The substrate was then placed in the instrument (Labsphere, UV-2000S, USA), and the test results were read.

[0105] 3) Skin elasticity test

[0106] Eighty target subjects were selected and divided into 16 groups of 5 people each. Subjects applied an appropriate amount of the product evenly to their face every morning before leaving home. Skin tests were conducted on volunteers at weeks 0 and 4. The skin rebound time R-value was measured using a Dermalab high-frequency skin elasticity testing probe (Dermalab Series SkinLab, Cortex, Denmark). The R-value represents an indicator of whether the tested sample improves skin elasticity; a higher R-value indicates a better effect on improving skin elasticity, and vice versa.

[0107] The results of the above measurements are shown in Table 2.

[0108] Table 2

[0109]

[0110] As can be seen from the table, the sunscreen lotions of Examples 1-7 generally exhibit good stability and high uniformity, and they also possess excellent SPF and skin elasticity indices. Specifically, the sunscreen lotions of Examples 1-7 use the emulsifier of this invention in component (A), and use cruciferous chicory extract, sclerotium gum, etc. as active ingredients (E), thereby achieving not only meeting the requirements for "freeze-thaw -20℃ ΔBS" and "40℃ ΔBS", but also generally having high-temperature uniformity and low-temperature uniformity indices below 0.7, demonstrating excellent stability. Furthermore, it was unexpectedly found that these sunscreen lotions of examples exhibited high "SPF values" (generally above 100) and "PA values" (generally above 15), and the results of skin elasticity tests showed that the sunscreen lotions of Examples 1-7 had a relatively high R-value improvement rate, indicating significant skin improvement. The reason for this may be that the active ingredients used in Examples 1-7 contain polysaccharides. Polysaccharides can form a film on the skin, which can improve the sun protection performance of sunscreen products. By combining them with the emulsifiers used in Examples 1-7, they synergistically improve skin elasticity and the stability of the emulsion.

[0111] Furthermore, a comparison between Examples 1-3 shows that while the types of emulsifiers are the same, the amounts used differ. Example 3 used the largest amount of emulsifier. However, the stability indices of Example 3, such as "freeze-thaw -20℃ ΔBS" and "40℃ ΔBS," both exceeded 5%. Additionally, Example 3 had relatively high high-temperature uniformity and low-temperature uniformity indices, indicating that it was less stable than the sunscreen lotions of Examples 1 and 2. The addition of high-content emulsifiers actually reduced stability. This may be because high-content emulsifiers can act as solubilizers, leading to incomplete emulsification. Furthermore, high-content emulsifiers result in a harder paste after homogenization, making it difficult to stir evenly when adding other active ingredients after cooling, thus reducing uniformity. A comparison between Examples 1 and 4 shows that due to the reduced amount of the active ingredient "Chlorella vulgaris extract," the stability and sun protection performance did not change significantly, but the R-value improvement rate decreased. The sunscreen lotions of Examples 5 and 6 both used "MONTANOV 68MB" as the emulsifier, which is different from the use of "... Compared to Example 1, "Sucro Plus" exhibited relatively good stability and sun protection performance. Specifically, Example 6, using "Sclerotium sclerotium gum" as an active ingredient, demonstrated good stability, sun protection performance, and skin elasticity test results; Example 7, using "Sclerotium sclerotium gum" as an emulsifier... The combination of "Sucro Plus" and "MONTANOV 68MB" also demonstrated good stability, sun protection performance, and skin elasticity test results.

[0112] Comparative Examples 1-9 mostly used "SIMUSOL 165" and "cetearearyl alcohol" as emulsifiers, and some comparative examples used "palm-shaped seaweed extract" as an active ingredient. Overall, compared to the sunscreen lotion of the examples, the stability, SPF, and skin elasticity test results of these comparative examples were not simultaneously satisfactory. Specifically, Comparative Example 1 differed from Example 1 in that it used "SIMUSOL 165" as an emulsifier. As a result, Comparative Example 1 showed "freeze-thaw -20℃ ΔBS" and "40℃ ΔBS" values ​​above 11, which were much higher than those of Example 1. Moreover, its SPF and skin elasticity test results were slightly lower than those of Example 1. The reason for this may be that the emulsifier used in Example 1 formed a lamellar liquid crystal structure. Lamellar liquid crystals have an oil / liquid / water structure, which is very similar to the oil / stratum corneum / water structure of human skin, which can improve product performance. Similarly, Comparative Example 2 differed from Example 1 in that it used "cetearearyl alcohol" as an emulsifier, and its various indicators were relatively poor. Comparative Example 3 used "cetearearyl alcohol" as an emulsifier. The combination of "Sucro Plus" and "SIMUSOL 165" showed lower "freeze-thaw -20℃ΔBS" and "40℃ΔBS" compared to Comparative Example 1, but a better SPF and slightly higher R-value improvement rate. However, Comparative Example 3 performed worse in all aspects compared to Example 1. Comparative Example 4 used "SIMUSOL 165" as an emulsifier and "Sclerotium sclerotium gum" as an active ingredient. Compared to Example 1, it performed worse in all aspects. Although it had almost the same level of stability and SPF as Comparative Example 1, its R-value improvement rate was extremely low. Comparative Example 5 differed from Example 1 in that it used "Kelp palmatum extract" as an active ingredient and had a different amount of emulsifier. Although it showed almost the same level of stability and SPF as Example 1, its R-value improvement rate was still low. Comparative Examples 6-9 differed from the Examples in both emulsifier and active ingredient, and their performance was poor in all aspects.

[0113] This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A sunscreen lotion, characterized in that, It includes: (A) Emulsifier, (B) Oil phase, (C) Aqueous phase, (D) Aqueous sunscreen agent, (E) Active ingredient, (F) Preservative, wherein, by weight %, The emulsifier (A) has a weight percentage of 2%, and the emulsifier (A) is a mixture of cetearyl alcohol and cetearyl glucoside, wherein the weight percentage of cetearyl alcohol to cetearyl glucoside is 80%:20%. The oil phase (B) consists of the following components: 3.5% diethylamino hydroxybenzoyl hexyl benzoate, 1.5% bis-ethylhexyloxyphenol methoxyphenyl triazine, 5% dioctyl carbonate, 1.5% ethylhexyl triazine ketone, 9% a mixture of ethylhexyl methoxycinnamate and butylated hydroxytoluene, 5% cyclopentamethoxydimethylsiloxane, 0.5% polymethylsilsesquioxane, and 0.3% tocopheryl acetate; The aqueous phase (C) consists of the following components: sodium stearoyl glutamate 0.3%, sodium polyacrylate 0.5%, disodium EDTA 0.05%, glycerol 2%, butanediol 3%, and water 48.35%. The (D) aqueous sunscreen agent is composed of the following components: 3.75% methylene bis-benzotriazolyltetramethylbutylphenol, 10.5975% water, 0.6% decyl glucoside, 0.03% propylene glycol, and 0.0225% xanthan gum; The active substance (E) is 2% of Carrageenan extract; The preservative (F) is 0.5% of a mixture of phenoxyethanol and ethylhexylglycerin, wherein the weight ratio of phenoxyethanol to ethylhexylglycerin is 90%:10%.

2. A method for preparing a sunscreen lotion as described in claim 1, characterized in that, Includes the following steps: (1) Heat a portion of the (B) oil phase to 80~100℃ and mix it evenly to obtain phase A1; (2) Add emulsifier (A) to phase A1, heat to 80~100℃, mix evenly to obtain phase A2; (3) Weigh another part (B) of the oil phase, add phase A2 to it, and stir to obtain phase A; (4) Prepare (C) aqueous phase and heat it to 80~100℃ to obtain phase B; (5) Mix phase A and phase B, and stir homogenously at 5000rpm-20000rpm for 5min-30min. After emulsification, cool to 30-50℃ to obtain phase C; (6) Add (D) aqueous sunscreen, (E) active substance and (F) preservative to phase C in sequence to obtain the final product.

3. The method for preparing the sunscreen lotion according to claim 2, characterized in that, The oil phase includes an oil phase (1) and an oil phase (2). The oil phase (1) is composed of a mixture of diethylamino hydroxybenzoyl hexyl benzoate, bis-ethylhexyloxyphenol methoxyphenyl triazine, dioctyl carbonate, ethylhexyl triazine ketone, ethylhexyl methoxycinnamate and butylated hydroxytoluene; the oil phase (2) is composed of cyclopentamethoxydimethylsiloxane, polymethylsilsesquioxane and tocopherol acetate.

4. The method for preparing the sunscreen lotion according to claim 2, characterized in that, In step (1), the portion (B) of the oil phase is heated to 85°C.

5. The method for preparing the sunscreen lotion according to claim 2, characterized in that, In step (2), emulsifier (A) is added to the A1 phase and heated to 85°C.

6. The method for preparing the sunscreen lotion according to claim 2, characterized in that, Prepare the aqueous phase (C) and heat it to 85°C.

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