Dual-GEL sunscreen composition, preparation method and use thereof
The dual-gel sunscreen composition achieves high SPF, water resistance, and a pleasant skin feel by combining specific thickeners and UV filters in a stable oil-in-water structure, enhancing UV stability and sensory experience.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ELC MANAGEMENT LLC
- Filing Date
- 2026-02-25
- Publication Date
- 2026-07-16
AI Technical Summary
Existing sunscreen cosmetics struggle to simultaneously achieve high SPF values, water resistance, sweat resistance, and a lightweight, non-sticky skin feel, with conventional formulations often compromising on stability and sensory experience.
A dual-gel composition comprising an aqueous phase gel and an oil phase gel, using specific thickeners, polyglycerol emulsifiers, and solvents to form a stable oil-in-water structure, incorporating organic and inorganic UV filters, which enhances UV stability and maintains a refreshing skin feel.
The dual-gel composition provides improved UV stability with minimal SPF loss, excellent water resistance, and a lightweight, non-sticky skin feel, addressing the limitations of existing sunscreen formulations.
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Figure CN2026079991_16072026_PF_FP_ABST
Abstract
Description
DUAL-GEL SUNSCREEN COMPOSITION, PREPARATION METHOD AND USE THEREOFFIELD OF THE INVENTION
[0001] The present invention relates to the field of cosmetics, in particular to a dual-gel composition, a method for preparing the same, and use of the same for preparing cosmetics, particularly sunscreen cosmetics. The present invention also relates to a sunscreen composition.BACKGROUND OF THE INVENTION
[0002] With the increasing diversification of consumer demands for cosmetics and personal care products, the development of multifunctional products has been a research hotspot in the cosmetics industry. For example, for sunscreen cosmetics, they are expected by consumers to combine high efficacy, good SPF effect (for example, about SPF50 or 50+) , and a lightweight and water-breaking skin feel, and at the same time, to satisfy high requirements in terms of water resistance and sweat resistance.
[0003] However, it is a great challenge for the existing sunscreen cosmetics products to meet the above requirements simultaneously, especially in terms of SPF value and skin feel. Among the currently known sunscreen cosmetics products on the market, products with a lightweight and water-breaking skin feel generally have a low SPF value as tested using the required methods in China, while those with a higher SPF value tend to have a sticky skin feel.
[0004] For example, a conventional gel or emulsion as a single system is difficult to meet the multiple demands mentioned above simultaneously. A gel is lightweight and watery, but has a weak load capacity for oils and powder particles (e.g., organic UV filters and inorganic UV filters) , which is a very big challenge in terms of SPF values. An emulsion is a dispersion system consisting of two immiscible liquids, and faces a big challenge in terms of stability and texture. In a sunscreen formulation, it is often necessary to add a large amount of polar organic UV filters and inorganic UV filters, which have a great influence on the stability and use experience of the emulsion, so that a high SPF value is achieved. Therefore, it is always necessary for a conventional emulsion to add a large amount of emulsifiers and thickeners. Although the conventional emulsion can be made into a thermodynamically stable emulsion system, but it feels very sticky.
[0005] Therefore, it remains desirable to provide a composition that can be prepared to provide a cosmetic product, particularly a sunscreen cosmetic product. Said cosmetic product provides good stability, water resistance and a high SPF value, and also a lightweight and water-breaking skin feel at the same time.
[0006] Daily exposure to sunlight subjects skin to various UV-induced damages, including erythema, sunburn, photoaging, and increased the risk of skin cancer. Therefore, sunscreen products, as a core means of UV protection, have always received significant attention within the industry. Existing sunscreens typically rely on organic or inorganic UV filters to absorb, scatter, or reflect long-wave and medium-wave ultraviolet radiation. However, most sunscreen formulations exhibit insufficient UV stability during actual use due to inherent structural instability and inevitable UV-induced photodegradation reactions.
[0007] Current research attempts to enhance photostability by adding additives such as photostabilizers, antioxidants, and encapsulated sunscreens, or by employing microencapsulation technology and improved film-forming agents. However, these approaches remain limited in varying degrees. For example, photostabilizers affect skin feel, encapsulation materials cause formulation compatibility issues, strong film-forming agents compromise sensory experience, or drive up costs, hindering their widespread adoption. Furthermore, during actual use, UV stability is influenced by multiple factors, including UV intensity, skin microenvironment, sweat / sebum, and friction, making it difficult to ensure long-term stable protection across various scenarios.
[0008] Therefore, there is an urgent need for a novel sunscreen composition or method for preparing such a composition that can more effectively improve the UV stability of sunscreen agents, enhance the structural stability of the sunscreen film, and ensure long-term, reliable UV protection across diverse usage scenarios.SUMMARY OF THE INVENTION
[0009] The present invention is made in view of the above problems existing in the prior art.
[0010] In a first aspect, the present invention provides a dual-gel composition, which comprises a dual-gel structure including an aqueous phase gel and an oil phase gel, wherein the composition includes the following components:
[0011] (1) a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer as an aqueous phase thickener;
[0012] (2) an oil phase thickener comprising one or more selected from the group comprising the following: (i) cellulose-based materials; (ii) dextrin / inulin fatty acid esters; (iii) glutamic acid and derivatives thereof; (iv) eicosanedioic acid and derivatives thereof; (v) polyamides; (vi) isophorone diisocyanate (IPDI) copolymers or sebacic acid copolymers; (vii) crosslinked polymers containing repeating units derived from hexamethylene-1, 6-diisocyanate (HDI) and trimethylolhexyllactone; (viii) hydroxystearic acid and derivatives thereof; (ix) polybutene; (x) waxes; (xi) sorbitan esters; and (xii) sucrose fatty acid esters;
[0013] (3) a polyglycerol emulsifier having an HLB value of 0 to 8; and
[0014] (4) a solvent.
[0015] In one embodiment, the composition is a dual-gel structure comprising a continuous aqueous phase gel and a dispersed oil phase gel.
[0016] In one embodiment, the continuous aqueous phase gel comprises an aqueous thickener, and the dispersed oil phase gel comprises an oil phase thickener.
[0017] In one embodiment, the average particle size of the dispersed oil phase gel is 0.1-50 μm. In one embodiment, the composition exhibits a dual-gel structure with a continuous aqueous phase and dispersed oil phase when observed under polarized light microscopy.
[0018] In one embodiment, the dual-gel structure is an oil-in-water dual-gel structure.
[0019] In one embodiment, the composition exhibits improved UV stability upon UV irradiation.
[0020] In one embodiment, the continuous aqueous phase gel and the dispersed oil phase gel are physically combined to form the dual-gel structure.
[0021] In a specific embodiment of the above dual-gel composition, the SPF loss rate of the composition upon UV irradiation is not higher than 5%, preferably negative.
[0022] In a specific embodiment of the above-described dual-gel composition, wherein:
[0023] the cellulose-based material comprises ethyl cellulose;
[0024] the dextrin / inulin fatty acid ester is one or more selected from the group comprising the following: dextrin palmitate and stearoyl inulin;
[0025] the glutamic acid and derivatives thereof is one or more selected from the group comprising the following: dibutyl lauroyl glutamate and dibutyl ethylhexyloyl glutamate;
[0026] the eicosanedioic acid and derivatives thereof is one or more selected from the group comprising the following: glycerol tris (behenic acid / isostearic acid / eicosanedioic acid) ester, glycerol behenate / eicosadioate;
[0027] the polyamide is one or more selected from the group comprising the following: polyamide-8 and polyamide-3;
[0028] the isophorone diisocyanate (IPDI) copolymer or sebacic acid copolymer is one or more selected from the group comprising the following: castor oil / IPDI copolymer and hydrogenated castor oil / sebacic acid copolymer;
[0029] the crosslinked polymer containing repeating units derived from hexamethylene-1, 6-diisocyanate (HDI) and trimethylolhexyllactone is one or more selected from the group comprising the following: caprylic / capric triglyceride, hydrogenated poly (C6-20 olefin) and crosslinked polymers of HDI / trimethylolhexyllactone;
[0030] the hydroxystearic acid and derivatives thereof is one or more selected from the group comprising the following: trihydroxystearin, 9-hydroxystearic acid, 10-hydroxystearic acid, and 12-hydroxystearic acid;
[0031] the polybutene is preferably selected from one or more polybutenes with a kinematic viscosity of 11 to 45,000 centistokes as measured at 100 ℃ according to ASTM D445A;
[0032] the wax is one or more selected from the group comprising the following: paraffin wax, microcrystalline wax, ozokerite, synthetic wax, polyethylene, glyceryl tribehenate, and glycerol behenate;
[0033] the sucrose fatty acid ester is obtained by esterification of sucrose with fatty acids, preferably the fatty acids being C12-C22, including saturated and mono / polyunsaturated fatty acids, HLB is regulated by the degree of fatty acid substitution. In the present invention, the HLB value is preferably 1-8. The sucrose fatty acid ester is selected from one or more of the group comprising the following: sucrose stearate, sucrose palmitate, sucrose laurate, and sucrose oleate, and the sorbitan ester comprises sorbitan oleate, preferably comprising one or more selected from the group comprising sorbitan olive oil ester and dextrin palmitate, more preferably comprising one or more selected from sorbitan olive oil ester and dextrin palmitate, and even more preferably comprising or being dextrin palmitate.
[0034] In a specific embodiment of the above-described dual-gel composition, wherein the content of the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer is 0.05 to 5.00%by weight, preferably 0.05-2.00%by weight, more preferably 0.05-1.00%by weight, based on the total weight of the composition.
[0035] In a specific embodiment of the above-described dual-gel composition, wherein the content of the oil phase thickener is 0.10 to 15.00%by weight, preferably 0.50-10.00%by weight, more preferably 1.00-5.00%by weight, based on the total weight of the composition.
[0036] In a specific embodiment of the above-described dual-gel composition, wherein the oil phase thickener comprises or is a dextrin / inulin fatty acid ester, preferably is a dextrin fatty acid ester, and the content of the dextrin / inulin fatty acid ester is 0.10 to 15.00%by weight, preferably 0.50-10.00%by weight, more preferably 1.00-4.00%by weight, based on the total weight of the composition.
[0037] In a specific embodiment of the above-described dual-gel composition, wherein the oil phase thickener comprises or is a sorbitan ester, preferably is a sorbitan ester, and the content of the sorbitan ester is 0.10 to 4.00%by weight, preferably 0.50-3.00%by weight, more preferably 2-3%by weight, based on the total weight of the composition.
[0038] In a specific embodiment of the above-described dual-gel composition, wherein the oil phase thickener comprises or is polybutene and sorbitan olivate, and preferably the content of polybutene is 0.10 to 4.00%by weight, preferably 0.50-3.00%by weight, and the content of sorbitan olivate is 0.10 to 4.00%by weight, preferably 0.50-3.00%by weight, based on the total weight of the composition.
[0039] In a specific embodiment of the above-described dual-gel composition, wherein the oil phase thickener comprises or is sorbitan olivate and dextrin palmitate, and preferably the content of sorbitan olivate is 0.10-4.00%by weight, preferably 0.50-3.00%by weight, and the content of dextrin palmitate is 0.10 to 10.00%by weight, preferably 0.20-5.00%by weight, based on the total weight of the composition.
[0040] In a specific embodiment of the above-described dual-gel composition, wherein the content of the polyglycerol emulsifier is 0.01 to 8.00%by weight, preferably 0.50-4.00%by weight, more preferably 0.50-2.00%by weight, based on the total weight of the composition.
[0041] In a specific embodiment of the above-described dual-gel composition, wherein the content of the solvent is 30.0 to 99.8%by weight, preferably 40.0-80.0%by weight, based on the total weight of the composition.
[0042] In a specific embodiment of the above-described dual-gel composition, wherein the solvent comprises water and a hydrophobic solvent, wherein the content of water is preferably 20-80%by weight, more preferably 30-70%by weight, and the content of the hydrophobic solvent is preferably 0.5-20%by weight, more preferably 1-10%by weight, based on the total weight of the composition.
[0043] In a specific embodiment of the above-described dual-gel composition, wherein the hydrophobic solvent is one or more selected from the group comprising the following:
[0044] a) esters of saturated and / or unsaturated, branched and / or unbranched alkanecarboxylic acids having a chain length of 3 to 30 carbon atoms with saturated and / or unsaturated, branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms,
[0045] b) esters of aromatic carboxylic acids with saturated and / or unsaturated, branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms,
[0046] c) alkyl benzoates,
[0047] d) lecithin and triglycerides of fatty acids, i.e. triglycerides of saturated and / or unsaturated, branched and / or unbranched alkanecarboxylic acids having a chain length of 8 to 24 carbon atoms,
[0048] e) dialkyl ethers and dialkyl carbonates,
[0049] f) saturated or unsaturated, branched or unbranched alcohols, and
[0050] g) amino acid alkyl esters, particularly alkyl lauroylsarcosinates, such as isopropyl lauroylsarcosinate.
[0051] In a specific embodiment of the above-described dual-gel composition, the composition further comprises a UV filter, which preferably comprises an organic UV filter and an inorganic UV filter, wherein
[0052] the organic UV filter is preferably one or more selected from the group comprising the following: alkyl alkoxycinnamateesters such as C2-C10 alkyl C1-C10 alkoxycinnamates, bis-ethylhexoxyphenol methoxyphenyl triazine, hexyl diethylaminohydroxybenzoylbenzoate, 3-benzylidene camphor, 4-methylbenzylidene camphor, benzophenone-3, butylmethoxydibenzoylmethane, diethylhexylbutyramidotriazinone, ethylhexyl dimethyl PABA, ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyltriazinone, humosalate, isoamyl p-methoxycinnamate, methylene bis-benzotriazolyl tetramethylbutylphenol, octocrylene, PEG-25 p-aminobenzoic acid, polyacrylamide methylbenzylidene camphor, polysiloxane-15, benzophenone-4, benzophenone-5, benzylidene camphor sulfonic acid and salts thereof, camphor benzalkonium methosulfate, disodium phenyl dibenzimidazole tetrasulfonate, phenylbenzimidazole sulfonic acid and potassium, sodium and triethanolamine salts thereof, and terephthalylidene dicamphor sulfonic acid and salts thereof;
[0053] the inorganic UV filter is preferably one or more selected from the group comprising the following:
[0054] pigments formed from metal oxides such as titanium dioxide, zinc oxide, iron oxide, zirconia or cerium oxide, preferably titanium dioxide and zinc oxide, more preferably lipophilically modified titanium dioxide. The content of the UV filter is preferably 0.1-30.0%by weight, more preferably 15.0-25.0%by weight, based on the total weight of the composition.
[0055] In a specific embodiment of the above-described dual-gel composition, the composition further comprises a neutralizing agent having a basic group, wherein the neutralizing agent is one or more selected from the group comprising the following: arginine, sodium hydroxide, potassium hydroxide, sodium citrate, triethanolamine, tromethamine, and aminomethylpropanol, preferably arginine, triethanolamine, tromethamine, and aminomethylpropanol, more preferably arginine, in particular, the content of the neutralizing agent is 0.01 to 5.00%by weight, preferably 0.05-1.00%by weight, based on the total weight of the composition.
[0056] In a specific embodiment of the above-described dual-gel composition, the composition further comprises one or more components selected from the group comprising the following:
[0057] ascorbic acid and derivatives thereof, such as ascorbyl tetraisopalmitate, L-ascorbic acid 2-glucoside vitamin C;
[0058] resorcinol and derivatives thereof;
[0059] enzymes;
[0060] humectants such as hyaluronic acid and salts thereof, protein hydrolysates, and polyols such as butylene glycol, propylene glycol, glycerol, dipropylene glycol, and diglycerol and the like;
[0061] polyethylene glycol;
[0062] recombinant collagens;
[0063] natural extracts;
[0064] anti-inflammatory agents;
[0065] oligomeric proanthocyanidins;
[0066] vitamins, such as vitamin A (retinol) , vitamin E (tocopherol) , vitamin B5 (panthenol) , vitamin B3 (nicotinamide) , their derivatives (particularly esters) , and mixtures thereof;
[0067] resveratrol;
[0068] BHT;
[0069] ceramides;
[0070] and psuedoceramides;
[0071] esters of amino acids, such as myristoylmethyl β-alanine (phytosterol / decyltetradecyl) ester;
[0072] cholesterol and derivatives thereof, such as 7-dehydrocholesterol;
[0073] steroids;
[0074] urea;
[0075] caffeine;
[0076] depigmenting agents such as kojic acid, hydroquinone, and caffeic acid;
[0077] salicylic acid and derivatives thereof;
[0078] α-hydroxy acids such as lactic acid, glycolic acid, and derivatives thereof;
[0079] retinoids such as carotenoids and derivatives of vitamin A;
[0080] hydrocortisone;
[0081] melatonin;
[0082] extracts of algae, fungi, plants, yeasts, bacteria, such as extracts of licorice, including potassium glycyrrhizinate, glabridin, enoxolone, licochalcone and the like;
[0083] antibacterial active agents such as 2, 4, 4'-trichloro-2'-hydroxydiphenyl ether (or triclosan) , 3, 4, 4'-trichlorocarbanilide (or triclocarban) and the acids mentioned above, particularly salicylic acid and derivatives thereof;
[0084] matting agents, such as fibers;
[0085] tensioning agents.
[0086] In a specific embodiment of the above-described dual-gel composition, wherein the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer comprises a structural unit derived from the following monomers:
[0087] -95.9 to 98.8%by weight of an ethylenically unsaturated carboxylic acid monomer which is one or more selected from the group comprising acrylic acid, methacrylic acid, and ethyl acrylic acid;
[0088] -1 to 3.5%by weight of acrylate compounds having the following formula,
[0089] wherein R is alkyl having from 10 to 30 carbon atoms, and R1 is hydrogen, , methyl, or ethyl; and
[0090] -optionally, 0.1 to 0.6%by weight of a cross-linking agent, such as an alkenyl ether and / or (C1-C2 alkyl) acrylate of a polyol, which has more than two polymerizable alkenyl groups and / or (C1-C2 alkyl) acrylate groups per molecule, wherein the polyol comprises at least 3 carbon atoms and at least 2 hydroxyl groups, for example at least 3 hydroxyl groups, the polyol is, for example, an alkylene polyol or an alkylene oxide adduct of an alkylene polyol.
[0091] In a specific embodiment of the above-described dual-gel composition, , wherein the aqueous phase thickener is an aqueous phase emulsifying thickener, and / or the oill phase thickener is an oil phase emulsifying thickener.
[0092] In a specific embodiment of the above-described dual-gel composition, wherein the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer is a crosslinked copolymer.
[0093] In a specific embodiment of the above-described dual-gel composition, the composition comprising the following components:
[0094] (1) 0.05 to 5.00%by weight, preferably 0.05-2.00%by weight, more preferably 0.05-1.00%by weight, of the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyll) acrylate copolymer, preferably a crosslinked copolymer of (C1-C2 alkyl) acrylic acid / C10-C30 alkyl acrylate;
[0095] (2) 0.10 to 10.00%by weight, preferably 0.20-5.00%by weight, of dextrin palmitate;
[0096] (3) optionally, 0.10 to 4.00%by weight, preferably 0.50-3.00%by weight, of sorbitan olivate;
[0097] (4) optionally, 0.10 to 4.00%by weight, preferably 0.50-3.00%by weight, of polybutene;
[0098] (5) 0.01 to 8.00%by weight, preferably 0.50-4.00%by weight, more preferably 0.50-2.00%by weight, of the polyglycerol emulsifier having an HLB value of 0 to 8, preferably 1 to 8, more preferably 3 to 8;
[0099] (6) optionally, 0.1-30.00%by weight, more preferably 15.0-25.0%by weight, of the UV filter;
[0100] (7) optionally, 0.01-5.00%by weight, preferably 0.05-1.00%by weigh, of arginine;
[0101] (8) optionally, 0.5-20%by weight, preferably 1-10%by weight, of the hydrophobic solvent; and
[0102] (9) 20-80%by weight, preferably 30-70%by weight, of water.
[0103] In a specific embodiment of the above-described dual-gel composition, the composition is for use in a cosmetic composition, particularly a sunscreen composition.
[0104] In a specific embodiment of the above-described dual-gel composition, the composition further comprises a polyacrylate crosspolymer-6.
[0105] In a specific embodiment of the above-described dual-gel composition, wherein the weight ratio of the (C1-C2 alkyl) acrylic acid / acrylic acid C10-C30 alkyl ester crosslinked copolymer and the polyacrylate crosspolymer-6 is from 0.3: 1 to 8: 1, preferably 0.3: 1 to 2: 1, more preferably 0.3: 1 to 1: 1, for example, 0.35: 1 to 8: 1, 0.35: 1 to 6: 1, 0.35: 1 to 2: 1, 0.35: 1 to 1: 1, 0.375: 1 to 8: 1. : 1, 0.375: 1 to 6: 1, 0.375: 1 to 2: 1, 0.375: 1 to 1: 1, 2: 1 to 8: 1, or 1: 1 to 2: 1, or any range between 0.3: 1 and 8: 1; or 0.3: 1, 0.35: 1, 0.375: 1, 0.4: 1, 0.5: 1, 1: 1, 2: 1, 3: 1, 4: 1, 5: 1, 6: 1, 7: 1, 8: 1, or any ratio between 0.3: 1 and 8: 1.
[0106] In a specific embodiment of the above-described dual-gel composition, wherein the polyacrylate crosspolymer-6 is added in an amount of 0.05 to 2.00%by weight, preferably 0.05 to 1.00%by weight, and more preferably 0.05 to 0.8%by weight, based on the total weight of the composition.
[0107] In a specific embodiment of the above-described dual-gel composition, the composition further comprises a UV filter, preferably an inorganic UV filter, most preferably a combination of inorganic and organic UV filters.
[0108] In a specific embodiment of the above-described dual-gel composition, wherein the UV filter is added in an amount of 0.1 to 30.0%by weight, preferably 15.0 to 25.0%by weight, based on the total weight of the composition.
[0109] In a specific embodiment of the above-described dual-gel composition, the composition further comprises a photostable enhancer, preferably a water-soluble polar solvent, more preferably one or more selected from the group comprising polyol derivatives, polyether compounds, and polyethylene glycols, and further preferably polyethylene glycols with a molecular weight < 700.
[0110] In a specific embodiment of the above-described dual-gel composition, wherein the photostable enhancer is added in an amount of 0.05-10%by weight, preferably 0.5-5.0%by weight, more preferably 1.0-5.0%by weight, based on the total weight of the composition.
[0111] The inventors discovered that by selecting specific aqueous phase thickeners (i.e., component (1) ) , specific oil phase thickeners (i.e., component (2) ) , a polyglycerol emulsifiers with specific HLB values (i.e., component (3) ) and a solvent, and combining them to form an oil-in-water dual gel structure, it is possible to obtain a cosmetic composition that simultaneously exhibits good stability, good waterproof and sweat-resistant properties, excellent SPF effect, and improved refreshing and water-repellent skin feel.
[0112] In a second aspect, the present invention provides a method for preparing the composition according to the first aspect, comprising the steps of:
[0113] i) mixing water, a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer, and optionally a neutralizing agent to obtain an aqueous phase component;
[0114] ii) mixing an oil phase thickener, a polyglycerol emulsifier, optionally a hydrophobic solvent, optionally an oil-soluble active agent and / or optionally a UV filter to obtain an oil phase component; and
[0115] iii) adding the oil phase component to the aqueous phase component and mixing to obtain the composition.
[0116] In one specific embodiment, the method for preparing the above-described dual-gel composition further includes the following step:
[0117] iv) based on step iii) , adding polyacrylate crosslinker-6 to obtain a dual-gel composition with good UV stability.
[0118] In a third aspect, the present invention provides the use of the dual-gel composition of the present invention in the preparation of cosmetics, particularly sunscreen cosmetics.
[0119] In a third aspect, the present invention provides use of the composition according to the first aspect or the composition prepared by the method according to the second aspect for preparing cosmetics, particularly sunscreen cosmetics.
[0120] In a specific embodiment of the use of the dual-gel composition in the preparation of cosmetics, the sunscreen cosmetic comprises a UV filter, preferably an inorganic UV filter, and most preferably a combination of inorganic and organic UV filters.
[0121] In a fourth aspect, the present invention provides a sunscreen composition comprising the following components:
[0122] (1) a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer as an aqueous phase thickener;
[0123] (2) a polyacrylate crosspolymer-6;
[0124] (3) an oil phase thickener;
[0125] (4) a polyglycerol emulsifier having an HLB value of 0 to 8, preferably 1 to 8, more preferably 3 to 8;
[0126] (5) a UV filter;
[0127] (6) a solvent.
[0128] In a specific embodiment of the above sunscreen composition, the UV filter comprises an inorganic UV filter, most preferably a combination of inorganic and organic UV filters.
[0129] In a specific embodiment of the above sunscreen composition, the composition further comprises (7) a photostable enhancer, preferably a water-soluble polar solvent, more preferably one or more selected from the group comprising polyol derivatives, polyether compounds, and polyethylene glycols (PEGs) , and further preferably polyethylene glycols with a molecular weight < 700.
[0130] In a specific embodiment of the above sunscreen composition, wherein the oil phase thickener comprising one or more selected from the group comprising the following: (i) cellulose-based materials; (ii) dextrin / inulin fatty acid esters; (iii) glutamic acid and derivatives thereof; (iv) eicosanedioic acid and derivatives thereof; (v) polyamides; (vi) isophorone diisocyanate (IPDI) copolymers or sebacic acid copolymers; (vii) crosslinked polymers containing repeating units derived from hexamethylene-1, 6-diisocyanate (HDI) and trimethylolhexyllactone; (viii) hydroxystearic acid and derivatives thereof; (ix) polybutene; (x) waxes; (xi) sorbitan esters; and (xii) sucrose fatty acid esters.
[0131] In a specific embodiment of the above sunscreen composition, wherein:
[0132] the cellulose-based material comprises ethyl cellulose;
[0133] the dextrin / inulin fatty acid ester is one or more selected from the group comprising the following: dextrin palmitate and stearoyl inulin;
[0134] the glutamic acid and derivatives thereof is one or more selected from the group comprising the following: dibutyl lauroyl glutamate and dibutyl ethylhexyloyl glutamate;
[0135] the eicosanedioic acid and derivatives thereof is one or more selected from the group comprising the following: glycerol tris (behenic acid / isostearic acid / eicosanedioic acid) ester, glycerol behenate / eicosadioate;
[0136] the polyamide is one or more selected from the group comprising the following: polyamide-8 and polyamide-3;
[0137] the isophorone diisocyanate (IPDI) copolymer or sebacic acid copolymer is one or more selected from the group comprising the following: castor oil / IPDI copolymer and hydrogenated castor oil / sebacic acid copolymer;
[0138] the crosslinked polymer containing repeating units derived from hexamethylene-1, 6-diisocyanate (HDI) and trimethylolhexyllactone is one or more selected from the group comprising the following: caprylic / capric triglyceride, hydrogenated poly (C6-20 olefin) and crosslinked polymers of HDI / trimethylolhexyllactone;
[0139] the hydroxystearic acid and derivatives thereof is one or more selected from the group comprising the following: trihydroxystearin, 9-hydroxystearic acid, 10-hydroxystearic acid, and 12-hydroxystearic acid;
[0140] the polybutene is preferably selected from one or more polybutenes with a kinematic viscosity of 11 to 45,000 centistokes as measured at 100 ℃ according to ASTM D445A;
[0141] the wax is one or more selected from the group comprising the following: paraffin wax, microcrystalline wax, ozokerite, synthetic wax, polyethylene, glyceryl tribehenate, and glycerol behenate;
[0142] the sucrose fatty acid ester is obtained by esterification of sucrose with fatty acids, preferably the fatty acids being C12-C22, including saturated and mono / polyunsaturated fatty acids, HLB is regulated by the degree of fatty acid substitution. In the present invention, the HLB value is preferably 1-8. The sucrose fatty acid ester is selected from one or more of the group comprising the following: sucrose stearate, sucrose palmitate, sucrose laurate, and sucrose oleate, and the sorbitan ester comprises sorbitan oleate, preferably comprising one or more selected from the group comprising sorbitan olive oil ester and dextrin palmitate, more preferably comprising one or more selected from sorbitan olive oil ester and dextrin palmitate, and even more preferably comprising or being dextrin palmitate.
[0143] The inventors discovered that by selecting specific aqueous phase thickeners (i.e., component (2) ) , specific oil phase thickeners (i.e., component (3) ) , a polyglycerol emulsifier with specific HLB values (i.e., component (4) ) , a UV filter (i.e., component (5) ) , and a solvent (i.e., component (6) ) and combining them, an unstable bicontinuous phase dual-gel structure was formed (see Comparative Examples B and C) .
[0144] However, by selecting specific aqueous phase thickeners (i.e., component (1) ) , specific oil-phase thickeners (i.e., component (3) ) , a polyglycerol emulsifier with specific HLB values (i.e., component (4) ) , a UV filter (i.e., component (5) ) , and a solvent (i.e., component (6) ) and combining them, a stable oil-in-water dual-gel system was formed (see Comparative Example A) . Furthermore, by selecting specific aqueous phase thickeners (i.e., components (1) and (2) ) , specific oil-phase thickeners (i.e., component (3) ) , a polyglycerol emulsifier with specific HLB values (i.e., component (4) ) , a UV filter (i.e., component (5) ) , and a solvent (i.e., component (6) ) and combining them, not only can a stable oil-in-water dual-gel be formed, but its UV protection loss rate is also greatly reduced. At this point, an oil-in-water dual-gel with a stable structure and good UV stability was obtained (see Examples A, B, C, D, E, F, G, H, I) .
[0145] Furthermore, when a photostable enhancer (e.g., polyethylene glycols with molecular weight<700) was added, an oil-in-water dual-gel with a stable structure and good UV stability can be obtained.
[0146] BRIEF DESCRIPTION OF THE FIGURES
[0147] The figures that are necessary for describing examples would be briefly introduced below to illustrate technical solutions of the present invention more clearly. It should be understood that these figures are merely for the purpose of facilitating those skilled in the art to understand the invention more readily, and are not intended to limit the scope of the invention.
[0148] Figs. 1A to 1I show microscope pictures of the compositions of Examples 1 to 4 and Comparative Examples 1 to 5 (left: normal light; middle: polarized light) and observation results (right) of the visual appearance of the mixtures obtained by mixing with a dye, respectively.
[0149] Fig. 2A shows, from left to right, pictures of the visual appearance of the compositions of Example 1, Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 2, Example 3, Example 4, Comparative Example 4, and Comparative Example 5 after storage at 50 ℃ for 4 weeks.
[0150] Fig. 2B shows, from left to right, enlarged views of the pictures of visual appearance of the compositions of Comparative Example 2, Comparative Example 3, and Comparative Example 5 after storage at 50 ℃ for 4 weeks.
[0151] Fig. 3 shows the test results of water resistance for individual compositions, wherein the three pictures in the first row correspond from left to right to the compositions of Example 1, Comparative Example 4, and Comparative Example 5, respectively, the three pictures in the second row correspond from left to right to the compositions of Comparative Examples 1 to 3, respectively, and the three pictures in the third row correspond from left to right to the compositions of Examples 2 to 4, respectively.
[0152] Fig. 4 shows the observation results of the material appearance for individual compositions after being applied, wherein the five pictures in the first row correspond from left to right to the compositions of Example 1, Comparative Example 1, Comparative Example 2, Comparative Example 3, and Comparative Example 5, respectively, and the four pictures in the second row correspond from left to right to the compositions of Example 2, Example 3, Example 4, and Comparative Example 4, respectively.
[0153] Figure 5 shows a microscopic image of the composition of Comparative Example A (left: normal light; right: polarized light) .
[0154] Figure 6 shows a microscopic image of the composition of Comparative Example B (left: normal light; right: polarized light) .
[0155] Figure 7 shows photographs of Comparative Examples A and B after being placed for one week (left: Comparative Example A; right: Comparative Example B) .
[0156] Figure 8 shows a microscopic image of the composition of Example D (left: normal light; right: polarized light) .DETAILED DESCRIPTION OF THE INVENTION
[0157] To make the objects, technical solutions, and beneficial technical effects of the present invention clearer, the present application will be described in detail below. It should be noted that various aspects, features, embodiments, and advantages thereof described in the present application may be compatible and / or may be combined together.
[0158] Unless stated specifically, the scientific and technical terms in the description have the same meanings as generally understood by those skilled in the art.
[0159] The expression “ (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer" as used herein refers to a copolymer obtained by copolymerization of a (C1-C2 alkyl) acrylic acid and a C10-C30 alkyl (C1-C2 alkyl) acrylate. The copolymer may be a copolymer of a (C1-C2 alkyl) acrylic acid and a C10-C30 alkyl (C1-C2 alkyl) acrylate, but may also be a copolymer of the two with other monomer raw materials copolymerizable therewith, as long as the resulting copolymer has an aqueous phase thickening effect, preferably an aqueous phase emulsifying and thickening effect. The copolymer may be a crosslinked copolymer or a non-crosslinked copolymer. In the case of a crosslinked copolymer, the crosslinking may be performed by adding a crosslinking agent during copolymerization, or by irradiating the copolymer.
[0160] In the present application, the term “ (C1-C2 alkyl) acrylic acid” refers to acrylic acid, methacrylic acid, ethyl acrylic acid, or combinations thereof. The term “C10-C30 alkyl (C1-C2 methyl) acrylate” can be understood similarly. In the present application, the term “ (C1-C2 alkyl) acrylic acid” is sometimes simply referred to as “ (alkyl) acrylic acid” , and “C10-C30 alkyl (C1-C2 methyl) acrylate” is also referred to as “C10-C30 alkyl (meth) acrylate” . The term “acrylate compounds” encompasses acrylates and (alkyl) acrylates.
[0161] In the present application, the term “dextrin / inulin fatty acid esters” refers to dextrin fatty acid esters and / or inulin fatty acid esters.
[0162] In the present application, the term “emulsifying thickener” refers to a substance having both thickening and emulsifying effects.
[0163] In the present application, the term "cosmetics" refers to daily chemical industrial products applied to the surface of the human body, such as skin, hair, nails, and lips, by means of rubbing, spraying, or other similar approaches, for the purpose of cleaning, protecting, beautifying, and modifying, including but not limited to sunscreen products, skin care products, and makeup products.
[0164] It will be understood that any numerical range recited herein includes all subranges within the range and any combination of various endpoints of such ranges or subranges.
[0165] Unless stated otherwise, the amounts involved herein all refer to amounts by weight, and all percentages are weight percentages based on the total composition.
[0166] The present invention relates to a composition, a method for preparing the same and use of the same. The present invention will be described in detail below.
[0167] Compositions
[0168] In a first aspect, the present invention relates to a composition, which is in the form of an oil-in-water dual-gel and comprises:
[0169] (1) a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer as an aqueous phase thickener;
[0170] (2) an oil phase thickener comprising one or more selected from the group consisting of celluloses, such as ethyl cellulose; dextrin / inulin fatty acid esters, such as dextrin palmitate and stearoyl inulin; glutamic acid and derivatives thereof, such as dibutyl lauroyl glutamide and dibutyl ethylhexanoyl glutamide; eicosanedioic acid and derivatives thereof, such as glycerol tris (behenic acid / isostearic acid / eicosanedioic acid) ester, glycerol behenate / eicosadioate; polyamides, such as polyamide-8 and polyamide-3; isophorone diisocyanate (IPDI) copolymers or sebacic acid copolymers, such as castor oil / IPDI copolymers and hydrogenated castor oil / sebacic acid copolymers; crosslinked polymers containing repeating units derived from hexamethylene-1, 6-diisocyanate (HDI) and trimethylolhexyllactone, such as crosslinked polymers of HDI / trimethylolhexyllactone, caprylic / capric triglyceride, and hydrogenated poly (C6-20 olefin) ; hydroxystearic acid and derivatives thereof, such as trihydroxystearin, 9-hydroxystearic acid, 10-hydroxystearic acid, and 12-hydroxystearic acid; polybutenes, preferably polybutenes having a kinematic viscosity of 11 to 45,000 centistokes, preferably 50 to 3200 centistokes, more preferably 200 to 3200 centistokes, and more preferably 200 to 400 centistokes as determined at 100 ℃ according to ASTM D445A; waxes such as paraffin wax, microcrystalline wax, ozokerite, synthetic wax, polyethylene, glyceryl tribehenate, and glycerol behenate; sorbitan esters, such as sorbitan olivate; preferably comprising one or more selected from the group consisting of sorbitan olivate, dextrin palmitate, and polybutene, further preferably comprising one or more selected from the group consisting of sorbitan olivate and dextrin palmitate, more preferably comprising or being dextrin palmitate; and sucrose fatty acid esters;
[0171] (3) a polyglycerol emulsifier having an HLB value from 0 to 8, preferably 1 to 8, and more preferably 3 to 8; and
[0172] (4) a solvent.
[0173] The dual-gel is composed of two mutually immiscible phases, aqueous phase gel and oil phase gel. This unique structure enables the dual-gel to have the characteristics of both gel and emulsion. The inventors have found that as compared with a composition in other form that does not have the above composition and / or is not in the form of the oil-in-water dual-gel (e.g., a dual-gel and emulsion in the form of water-in-oil (W / O) ) , the dual-gel composition in the form of oil-in-water having the above composition can provide good stability, excellent SPF effect, and improved skin feel. It was also surprisingly found that the oil-in-water dual-gel system can undergo phase transition to a water-in-oil form as it is applied to the skin, thereby forming an oil film on surface of the skin, and thus exhibits enhanced water resistance.
[0174] In one or more embodiments, in the oil-in-water dual-gel, the aqueous phase gel comprises component (1) , i.e. a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer as an aqueous phase thickener; and the oil phase gel comprises component (2) , i.e., an oil phase thickener, and component (3) , i.e., a polyglycerol emulsifier.
[0175] In one or more embodiments, the content of the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer is 0.05 to 5.00%by weight, preferably 0.05 to 2.00%by weight, and more preferably 0.05 to 1.00%by weight, based on the total weight of the composition. For example, the content of the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer may be 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 2.00, 3.00, 4.00, 5.00%by weight, or within a range defined by any two thereof, based on the total weight of the composition.
[0176] In one or more embodiments, the content of the oil phase thickener is 0.10 to 15.00%by weight, preferably 0.50 to 10.00%by weight, and more preferably 1.00 to 5.00%by weight, based on the total weight of the composition. For example, the content of the oil phase thickener may be 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 2.00, 3.00, 4.00, 5.00, 6.00, 7.00, 8.00, 9.00, 10.00, 11.00, 12.00, 13.00, 14.00, 15.00%by weight, or within a range defined by any two thereof, based on the total weight of the composition.
[0177] In one or more embodiments, the oil phase thickener comprises one or more selected from sorbitan esters, dextrin / inulin fatty acid esters and polybutenes (Preferably polybutenes having a kinematic viscosity of 11 to 45000 centistokes, preferably 50 to 3200 centistokes, more preferably 200 to 3200 centistokes, and more preferably 200 to 400 centistokes as determined at 100 ℃ according to ASTM D445A. For example, the kinematic viscosity of the polybutenes determined at 100 ℃ according to ASTM D445A may be, for example, 11, 20, 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1500, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 15000, 20000, 25000, 30000, 35000, 40000, 45000 centistokes) . In one or more preferred embodiments, the oil phase thickener comprises one or more selected from the group consisting of sorbitan olivate, dextrin palmitate, and polybutenes (preferably polybutenes having a kinematic viscosity of 11 to 45000 centistokes, preferably 50 to 3200 centistokes, more preferably 200 to 3200 centistokes, and more preferably 200 to 400 centistokes as determined at 100 ℃ according to ASTM D445A) .
[0178] In one or more further preferred embodiments, the oil phase thickener comprises or is a dextrin / inulin fatty acid ester, preferably dextrin palmitate. The inventors have unexpectedly found that, relative to the case where the oil phase thickener is free of dextrin / inulin fatty acid esters, when the oil phase thickener comprises or is a dextrin / inulin fatty acid ester, in particular dextrin palmitate, both the SPF effect and skin feel of the resulting composition will be further improved. Preferably, the oil phase thickener comprises or is a dextrin / inulin fatty acid ester, preferably dextrin palmitate, and the content of the dextrin / inulin fatty acid ester is 0.10 to 15.00%by weight, preferably 0.50 to 10.00%by weight, and more preferably 1.00 to 5.00%by weight, and may be, for example, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 2.00, 3.00, 4.00, 5.00, 6.00, 7.00, 8.00, 9.00, 10.00, 11.00, 12.00, 13.00, 14.00, 15.00%by weight, or within a range defined by any two thereof, based on the total weight of the composition.
[0179] In one or more embodiments, the oil phase thickener comprises or is a sorbitan ester, preferably sorbitan olivate, and the content of the oil phase thickener is 0.10 to 4.00%by weight, preferably 0.50 to 3.00%by weight, and may be, for example, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 2.00, 3.00, 4.00%by weight, or within a range defined by any two thereof, based on the total weight of the composition.
[0180] In one or more embodiments, the oil phase thickener comprises or is polybutene and sorbitan olivate, preferably the content of polybutene is 0.10 to 4.00%by weight, preferably 0.50 to 3.00%by weight (e.g., may be 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 2.00, 3.00, 4.00%by weight, or within a range defined by any two thereof) , and the content of sorbitan olivate is 0.50 to 4.00%by weight, preferably 0.20 to 3.00%by weight (e.g., may be 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 2.00, 3.00, 4.00%by weight, or within a range defined by any two thereof) , based on the total weight of the composition.
[0181] In one or more embodiments, the oil phase thickener comprises or is sorbitan olivate and dextrin palmitate, preferably the content of sorbitan olivate is 0.10 to 4.00%by weight, preferably 0.50 to 3.00%by weight (e.g., may be 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 2.00, 3.00, 4.00%by weight, or within a range defined by any two thereof) , and the content of dextrin palmitate is 0.10 to 10.00%by weight, preferably 0.20 to 5.00 %by weight, and more preferably 0.20 to 3.00%by weight (e.g., may be 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 2.00, 3.00, 4.00, 5.00, 6.00, 7.00, 8.00, 9.00, 10.00%by weight, or within a range defined by any two thereof) , based on the total weight of the composition.
[0182] In one or more embodiments, the polyglycerol emulsifier has an HLB value of 0 to 8, preferably 1 to 8, and more preferably 3 to 8, e.g., may be 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, or within a range defined by any two thereof. Based on traditional emulsification systems, if an emulsifier having an HLB value less than or equal to 8 is selected, it is generally believed that only water-in-oil emulsions will be obtained. The inventors unexpectedly found that by using a dual-gel form, even if an emulsifier having an HLB value of less than 8 is selected, an oil-in-water double gel can also be obtained, whereby improved skin feel, water resistance and sweat resistance can be simultaneously achieved.
[0183] In one or more embodiments, the oil phase thickener comprises sucrose fatty acid ester, which is obtained by esterification of sucrose with fatty acids, preferably the fatty acids being C12-C22, including saturated and mono / polyunsaturated fatty acids.
[0184] HLB is regulated by the degree of fatty acid substitution. In the present invention, the HLB value is preferably 1-8. The sucrose fatty acid ester is selected from one or more of the group comprising the following: sucrose stearate, sucrose palmitate, sucrose laurate, and sucrose oleate,
[0185] In one or more embodiments, the content of the polyglycerol emulsifier is 0.01 to 8.00%by weight, preferably 0.50 to 4.00%by weight, and more preferably 0.50 to 2.00%by weight, based on the total weight of the composition. For example, the content of the polyglycerol emulsifier may be 0.01, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 2.00, 3.00, 4.00, 5.00, 6.00, 7.00, 8.00%by weight, or within a range defined by any two thereof, based on the total weight of the composition.
[0186] In one or more embodiments, the content of the solvent is 30.0 to 99.8%by weight, preferably 40.0 to 80.0%by weight, based on the total weight of the composition. For example, the content of the solvent may be 30.0, 40.0, 50.0, 60.0, 70.0, 80.0, 90.0, 95.0, 99.0, 99.8%by weight, or within a range defined by any two thereof, based on the total weight of the composition.
[0187] In one or more embodiments, the solvent comprises water and a hydrophobic solvent (also referred to as an oleophilic solvent or an oil-soluble solvent) to act as media for forming the aqueous phase and the oil phase in the dual-gel, respectively.
[0188] The hydrophobic solvent may be selected from one or more of:
[0189] mineral oils, mineral waxes, polar oils such as triglycerides of capric acid or caprylic acid, and natural oils such as castor oil; fats, waxes and other natural and synthetic esters, preferably esters of fatty acids with alcohols with a low carbon number, for example esters with isopropanol, propylene glycol or glycerol, or esters of fatty alcohols with alkanoic acids having a low carbon number or with fatty acids; alkyl benzoates; silicone oils such as dimethylpolysiloxanes, diethylpolysiloxanes, diphenylpolysiloxanes, and mixed forms thereof.
[0190] Preferably, the polar oil is selected from:
[0191] a) esters of saturated and / or unsaturated, branched and / or unbranched alkanecarboxylic acids having a chain length of 3 to 30 carbon atoms with saturated and / or unsaturated, branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms;
[0192] b) esters of aromatic carboxylic acids with saturated and / or unsaturated, branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms, which may be advantageously selected from the group consisting of isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl oleate, n-butyl stearate, n-hexyl laurate, n-decyl oleate, isooctyl stearate, isononyl stearate, isonononyl isononanoate, isotridecyl isononanoate, 2-ethylhexyl palmitate, 2-ethylhexyl laurate, 2-ethylhexyl isostearate, 2-hexyldecyl stearate, 2-octyldodecyl palmitate, 2-ethylhexyl cocoate, oleyl oleate, oleyl erucate, erucyl oleate, erucyl erucate, dicaprylyl carbonate (dicaprypypcarbonat) ( CC from BASF) , dibutyl adipate ( B from BASF) , cocoglycerides ( 331 from BASF) , ethylhexyl methoxypropene ( S1 from Hallstar) , butyloctyl salicylate (e.g., BHB from Hallstar) , neopentyl glycol diheptanoate (e.g., 7 from Inolex) , and synthetic, semi-synthetic and natural mixtures of these esters, e.g., heptyl undecylenate (e.g., Natural from Inolex) , jojoba oil;
[0193] c) alkyl benzoates such as C12-15 alkyl benzoates ( TN from Innospec Performance Chemicals) or 2-phenylethyl benzoate ( 226 from Ashland) ;
[0194] d) lecithin and triglycerides of fatty acids, i.e. triglycerides of saturated and / or unsaturated, branched and / or unbranched alkanecarboxylic acids having a chain length of 8 to 24 carbon atoms, particularly 12 to 18 carbon atoms. For example, the triglyceride of fatty acid may be selected from the group consisting of cocoglycerides, olive oil, sunflower oil, soybean oil, peanut oil, rapeseed oil, almond oil, palm oil, coconut oil, castor oil, wheat germ oil, grape seed oil, safflower oil, evening primrose oil, almond oil, avocado oil and the like;
[0195] e) dialkyl ethers and dialkyl carbonates, for example, dioctyl ether (e.g. OE from BASF) and / or dioctyl carbonate (e.g. CC from BASF) are advantageous;
[0196] f) saturated or unsaturated, branched or unbranched alcohols, such as octyldodecanol;
[0197] g) amino acid alkyl esters, particularly alkyl lauroylsarcosinates, such as isopropyl lauroylsarcosinate ( SL-205 from Ajinomoto OmniChem) ; and
[0198] h) mixed forms thereof, for example, LexSolvTM A (neopentyl glycol diheptanoate (and) propylene glycol dibenzoate) from Inolex.
[0199] In further embodiments, the content of water is 20 to 80%by weight, and more preferably 30 to 70%by weight, based on the total weight of the composition. For example, the content of water may be 20, 30, 40, 50, 60, 70, 80%by weight, or within a range defined by any two thereof, based on the total weight of the composition. In further embodiments, the content of the hydrophobic solvent is 0.5 to 20%by weight, and more preferably 1 to 10%by weight, based on the total weight of the composition. For example, the content of the hydrophobic solvent may be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14, 14.5, 15, 15.5, 16, 16.5, 17, 17.5, 18, 18.5, 19, 19.5, 20%by weight, or within a range defined by any two thereof, based on the total weight of the composition.
[0200] In one or more embodiments, the composition further comprises a UV filter, which may be selected from one or more of the group consisting of:
[0201] an organic UV filter, for example alkyl alkoxycinnamateesters such as C2-C10 alkyl C1-C10 alkoxycinnamates, bis-ethylhexoxyphenol methoxyphenyl triazine, hexyl diethylaminohydroxybenzoylbenzoate, 3-benzylidene camphor, 4-methylbenzylidene camphor, benzophenone-3, butylmethoxydibenzoylmethane, diethylhexylbutyramidotriazinone, ethylhexyl dimethyl PABA, ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyltriazinone, humosalate, isoamyl p-methoxycinnamate, methylene bis-benzotriazolyl tetramethylbutylphenol, octocrylene, PEG-25 p-aminobenzoic acid, polyacrylamide methylbenzylidene camphor, polysiloxane-15, benzophenone-4, benzophenone-5, benzylidene camphor sulfonic acid and salts thereof, camphor benzalkonium methosulfate, disodium phenyl dibenzimidazole tetrasulfonate, phenylbenzimidazole sulfonic acid and potassium, sodium and triethanolamine salts thereof, and terephthalylidene dicamphor sulfonic acid and salts thereof; and
[0202] an inorganic UV filter, for example pigments formed from metal oxides (the average size of primary particles is from 5 to 100 nm, preferably from 5 to 50 nm) , such as titanium dioxide (amorphous or crystalline in rutile or anatase form) , zinc oxide, iron oxide, zirconia or cerium oxide, which per se have been known as UV photoprotectants. Preferably, titanium dioxide and zinc oxide, and more preferably titanium dioxide (at least one coating which may comprise at least one compound selected from the group consisting of alumina, aluminum hydroxide, silica, silicone, silane, fatty acid, fatty alcohol, lecithin, amino acid, polysaccharide, protein, alkanolamine, waxes such as beeswax, (meth) acrylic polymer and an organic UV filter) .
[0203] In a preferred embodiment, the UV filter comprises an organic UV filter and an inorganic UV filter.
[0204] In further embodiments, the content of the UV filters is 0.1 to 30.0%by weight, and preferably 15.0 to 25.0%by weight, based on the total weight of the composition. For example, the content of the UV filters may be 0.1, 0.5, 1.0, 5.0, 10.0, 20.0, 30.0%by weight, or within a range defined by any two thereof, based on the total weight of the composition. The inventors found that the composition in the form of an oil-in-water dual-gel according to the present invention can be compatible with both an organic UV filter and an inorganic UV filter, thereby achieving excellent SPF effects.
[0205] In one or more embodiments, the composition further comprises a neutralizing agent having a basic group. The neutralizing agent can be used to neutralize the carboxylic acid group in the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer, thereby further improving thickening and emulsifying effects. The neutralizing agent may be selected from one or more of arginine, sodium hydroxide, potassium hydroxide, sodium citrate, triethanolamine, tromethamine, and aminomethylpropanol, preferably arginine, triethanolamine, tromethamine, and aminomethylpropanol, and more preferably arginine. In further embodiments, the content of the neutralizing agent is 0.01 to 5.00%by weight, preferably 0.05 to 1.00%by weight, based on the total weight of the composition. For example, the content of the neutralizing agent may be 0.01, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.25, 2.00, 2.25, 3.00, 3.25, 4.00, 4.25, 5.00%by weight, or within a range defined by any two thereof, based on the total weight of the composition.
[0206] In one or more embodiments, the composition further comprises additional ingredients (e.g. active substances) . The additional ingredients that can be mentioned include ascorbic acid and derivatives thereof such as ascorbic acid tetraisopalmitate (sold under the trade name NIKKOL VC-IP by NIKKOL GROUP (Nikko Chemicals) , L-ascorbic acid 2-glucoside vitamin C (sold under the trade name AA2GTM by NAGASE &CO., LTD) ; resorcinol and derivatives thereof; enzymes; and mixtures thereof. The ascorbic acid may have any properties. Thus, it may be of natural origin, in powder form or in the form of orange juice, preferably orange juice concentrate. It may also be of synthetic origin, preferably in powder form.
[0207] Mention can be made, for example, of humectants (moisturizers) , such as hyaluronic acid and salts thereof, protein hydrolysates, and polyols such as butylene glycol, propylene glycol, glycerol, dipropylene glycol, diglycerol and the like; polyethylene glycol; recombinant collagens; natural extracts; anti-inflammatory agents; oligomeric proanthocyanidins; vitamins, such as vitamin A (retinol) , vitamin E (tocopherol) , vitamin B5 (panthenol) , vitamin B3 (nicotinamide) , their derivatives (particularly esters) , and mixtures thereof; resveratrol; BHT; ceramides; and psuedoceramides; esters of amino acids, such as myristoylmethyl β-alanine (phytosterol / decyltetradecyl) ester (sold under the tradenames PS-203, PS-304, and PS-306 by Ajinomoto Co., Inc. ) ; cholesterol and derivatives thereof, such as 7-dehydrocholesterol (sold under the trade name SKIN'ENTIAL DC 96P by MMP International) ; steroids; urea; caffeine; depigmenting agents such as kojic acid, hydroquinone, and caffeic acid; salicylic acid and derivatives thereof; α-hydroxy acids such as lactic acid, glycolic acid, and derivatives thereof; retinoids such as carotenoids and derivatives of vitamin A; hydrocortisone; melatonin; extracts of algae, fungi, plants, yeasts, bacteria, such as extracts of licorice, including potassium glycyrrhizinate, glabridin, enoxolone, licochalcone and the like; antibacterial active agents such as 2, 4, 4'-trichloro-2'-hydroxydiphenyl ether (or triclosan) , 3, 4, , 4'-trichlorocarbanilide (or triclocarban) and the acids mentioned above, particularly salicylic acid and derivatives thereof; matting agents, such as fibers; tensioning agents; and mixtures thereof.
[0208] The contents of other possible ingredients are not particularly limited, and can be selected in an appropriate amount by those skilled in the art as desired.
[0209] In one or more embodiments, the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer comprises a structural unit derived from the following monomers:
[0210] -95.9 to 98.8%by weight of an ethylenically unsaturated carboxylic acid monomer selected from one or more of acrylic acid, methacrylic acid, and ethyl acrylic acid;
[0211] -1 to 3.5%by weight of acrylate compounds having the following formula,
[0212] wherein R is alkyl having from 10 to 30 carbon atoms, and R1 is hydrogen, , methyl, or ethyl; and
[0213] -optionally, 0.1 to 0.6%by weight of a cross-linking agent, such as an alkenyl ether and / or (C1-C2 alkyl) acrylate of a polyol, which has more than two polymerizable alkenyl groups and / or (C1-C2 alkyl) acrylate groups per molecule, wherein the polyoll comprises at least 3 carbon atoms and at least 2 hydroxyl groups, for example at least 3 hydroxyl groups. The polyol may, for example, be an alkylene (e.g., C3-C20, such as C3-C10) polyol or an alkylene oxide (e.g., C2-C4, such as C2-C3) adduct of an alkylene (e.g., C3-C20, such as C3-C10) polyol (for example, the number of alkylene oxide molecules that are added to each hydroxyl group of each polyol molecule is 1 to 40, e.g., 2 to 30, e.g., 3 to 20, e.g., 5 to 10) .
[0214] In one or more further embodiments, the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer comprises a structural unit derived from the following monomers: 96 to 97.9%by weight of acrylic acid, 2.5 to 3.5%by weight of alkyl methacrylate (in which the alkyl group comprises 12 to 22 carbon atoms) , and 0.2 to 0.4 %by weight of a crosslinking agent. The crosslinking agent may be, for example, as defined above. Non-limiting examples of the crosslinking agent include those selected from, for example, ethylene glycol, (poly) ethylene glycol (such as diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol) , propylene glycol, (poly) propylene glycol (such as dipropylene glycol, tripropylene glycol, tetrapropylene glycol, polypropylene glycol) , polyethylene glycol-propylene glycol, glycerol, polyglycerol, pentaerythritol, dipentaerythritol, trimethylolpropane, sugars (such as sucrose) ; or polyallyl ethers (for example, di-, tri-or tetra-or higher allyl ethers depending on the number of hydroxyl groups contained in the molecule) , polyvinyl ethers (for example, di-, tri-or tetra-or higher vinyl ethers depending on the number of hydroxyl groups contained in the molecule) , and poly (C1-C2) acrylates (for example, di-, tri-or tetra-or higher (C1-C2) acrylates depending on the number of hydroxyl groups contained in the molecule) of one or more of their respective alkylene oxides (for example, C2-C4, for example, C2-C3) adducts.
[0215] In one or more embodiments, the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer is an acrylic acid / C10-C30 alkyl acrylate copolymer.
[0216] In one or more embodiments, the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer is a crosslinked copolymer.
[0217] In one or more embodiments, the aqueous phase thickener is an aqueous phase emulsifying thickener, and / or the oil phase thickener is an oil phase emulsifying thickener.
[0218] In one or more embodiments, the composition further comprises:
[0219] (1) 0.05 to 5.00%by weight, preferably 0.05 to 2.00%by weight, more preferably 0.05 to 1.00%by weight of the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer, preferably a crosslinked copolymer of acrylic acid / C10-C30 alkyl acrylate;
[0220] (2) 0.10 to 10.00%by weight, preferably 0.20 to 5.00%by weight of dextrin palmitate;
[0221] (3) optionally, 0.10 to 4.00%by weight, preferably 0.50 to 3.00%by weight of sorbitan olivate;
[0222] (4) optionally, 0.10 to 4.00%by weight, preferably 0.50 to 3.00%by weight of polybutene;
[0223] (5) 0.01 to 8.00%by weight, preferably 0.50 to 4.00%by weight, and more preferably 0.50 to 2.00%by weight of the polyglycerol emulsifier having an HLB value of 0 to 8, preferably 1 to 8, more preferably 3 to 8;
[0224] (6) optionally, 0.1-30.00%by weight, more preferably 15.0-25.00%by weight of the UV filters;
[0225] (7) optionally, 0.01-5.00%by weight, preferably 0.05-1.00%by weight of arginine;
[0226] (8) optionally, 0.5-20%by weight, preferably 1-10%by weight of the hydrophobic solvent; and
[0227] (9) 20-80%by weight, preferably 30-70%by weight of water.
[0228] In one or more embodiments, the composition further comprises other ingredients depending on its intended use.
[0229] In one or more embodiments, the composition may be a cosmetic composition, particularly a sunscreen composition. In particular, when used as a sunscreen composition, the composition can provide good stability, good water resistance and sweat resistance, excellent SPF effect, and improved lightweight and water-breaking skin feel at the same time, thereby obtaining a sunscreen cosmetic product that meets various performance requirements simultaneously.
[0230] The composition according to the invention may be, for example, in the form of a cream or emulsion.
[0231] The composition according to the present invention may be applied to the skin in particular in the form of fine particles by means of a pressurizing device.
[0232] The composition according to the invention packaged in aerosol form typically contains a conventional propellant such as a hydrogen fluoride compound, dichlorodifluoromethane, difluoroethane, dimethyl ether, isobutane, n-butane, propane, or trichlorofluoromethane. They are preferably present in an amount ranging from 15%to 50%by weight based on the total weight of the composition.
[0233] Methods of preparation
[0234] In a second aspect, the present invention relates to a method for preparing the composition according to the first aspect, comprising the steps of:
[0235] i) mixing water, a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer, and optionally a neutralizing agent to obtain an aqueous phase component;
[0236] ii) mixing an oil phase thickener, a polyglycerol emulsifier, optionally a hydrophobic solvent, optionally an oil-soluble active agent and / or optionally a UV filter to obtain an oil phase component; and
[0237] iii) adding the oil phase component to the aqueous phase component and mixing to obtain the composition.
[0238] The inventors found that a composition in the form of an oil-in-water dual-gel can be prepared by the above method. The composition exhibits good stability and is compatible with both an organic UV filter and an inorganic UV filter, and shows a high SPF effect and provides refreshing and water-breaking skin feel at the same time. In contrast, if other methods are used (for example, adding the aqueous phase component to the oil phase component in step iii) ) , it is impossible to obtain a composition in the oil-in-water dual-gel form, thereby failing to achieve good stability, high SPF effect, and refreshing and water-breaking skin feel simultaneously.
[0239] The components comprised in the composition are as described above in the section relating to the composition of the first aspect of the present invention, which are not repeated here.
[0240] The mixing conditions in steps i) -iii) can be appropriately selected by those skilled in the art according to actual needs.
[0241] In one or more embodiments, in step i) , water, a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer, and optionally a neutralizing agent are mixed well and heated to 40 to 90 ℃, for example, 40, 50, 60, 70, 80, 90 ℃, or within a range defined by any two thereof, to obtain the aqueous phase component.
[0242] In one or more embodiments, in step ii) , an oil phase thickener, a polyglycerol emulsifier, and also optionally a hydrophobic solvent, optionally an oil-soluble active substance and / or optionally a UV filter are homogenized at a temperature of 40-99 ℃, preferably 70-99 ℃ (e.g., 40, 50, 60, 70, 80, 90, 95, 99 ℃, or within a range defined by any two thereof) for 5 minutes to 1 hour, e.g., 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60 minutes, or within a range defined by any two thereof, to obtain the oil phase component.
[0243] In one or more embodiments, in step iii) , the oil phase component is added to the aqueous phase component and homogenized for 5 minutes to 1 hour, for example, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60 minutes or within a range defined by any two thereof. The homogenization rate may be 4000-9000 rpm, preferably 5000-8000 rpm, for example, 4000, 5000, 6000, 7000, 8000, 9000 rpm, or within a range defined by any two thereof. In one or more embodiments, the method further comprises cooling down to a temperature of 20-60 ℃, particularly 30-40 ℃, after homogenization, to obtain the composition.
[0244] The invention also relates to a composition obtained by the method according to the second aspect of the invention. All of the above descriptions of the components of the composition according to the first aspect of the present invention applies here and will not be repeated here.
[0245] Use
[0246] In a third aspect, the present invention relates to use of the composition according to the first aspect or the composition prepared by the method according to the second aspect for preparing cosmetics, particularly sunscreen cosmetics.
[0247] The composition according to the invention is particularly suitable for cosmetics, particularly sunscreen cosmetics. When the composition according to the present invention is used for preparing a sunscreen cosmetic, it is possible to obtain a sunscreen cosmetic that combines good stability, good water resistance and sweat resistance, excellent SPF effect, and improved refreshing and water-breaking skin feel.
[0248] However, the use of the composition according to the present invention is not particularly limited. For example, the composition can be used for other applications where improved stability, water resistance, sweat resistance, skin feel, or SPF values are desired.
[0249] Examples
[0250] In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with examples. It should be understood that specific examples described here are only for illustrating the present invention and are not for limiting the present invention. Hereinafter, unless otherwise specified, the contents or concentrations mentioned are by weight.
[0251] I. Sources of Raw Materials
[0252] Sources of the raw materials involved in the examples are shown in Table 1 below.
[0253] Table 1: Sources of Raw Materials
[0254] II. Test methods
[0255] Characterization of emulsion types
[0256] Microscopy method and dye mixing experiments were used to determine the emulsion types of a composition to be tested, respectively, that is, to determine whether the composition belongs to an oil-in-water (O / W) or a water-in-oil (W / O) form. In the invention, whether the composition to be tested belongs to the O / W or W / O emulsion type was determined based on the composition of the dispersed phase (particles) or the continuous phase (matrix) . Specifically, the composition belongs to the O / W emulsion type if the oil phase acts as the dispersed phase (particles) ; otherwise, it belongs to the W / O emulsion type if the oil phase acts as the continuous phase (matrix) .
[0257] (1) Test by microscopy method: A sample of the composition to be tested was observed using a microscope (model LEICA DM2500 LED Optical microscope, purchased from Leica Microsystems Inc. ) under a normal field and a polarized light field, respectively, to determine the emulsion type. Specifically, since the oil phase generated a brightening phenomenon under the polarized light field, if the particles shined under the polarized light field in a microscope picture, the oil phase was a dispersed phase, i.e., the composition was determined to be in the O / W emulsion type; if the particles appeared black under the polarized light field in the microscope picture (showing no polarized light phenomenon) , the oil phase was the continuous phase, i.e., the composition was determined to be in the W / O emulsion type.
[0258] (2) Dye mixing experiments: 2 g of a sample of the composition to be tested was placed in a weighing plate, to which 0.2 g of an aqueous solution of Water Soluble Blue (BLUE 1 (CI 42090) , with a trade name of UNICEF BLUE 05601-J, purchased from Sensient) at a concentration of 0.1%by weight was dropped. The plate was thoroughly shaken to observe whether Water Soluble BLUE 1 could be completely and evenly mixed into the sample. Based on the principle of “like dissolves like” , if Water Soluble BLUE 1 could be completely and evenly mixed into the sample, it indicated that the external phase was an aqueous phase, i.e. the composition was determined to be in the O / W emulsion type; and if Water Soluble BLUE 1 was difficult to be mixed into the sample, the composition was determined to be in the W / O emulsion type.
[0259] Characterization of stability 1
[0260] A sample of the composition to be tested was stored at a temperature of 50 ℃ for 4 weeks, then the sample was observed for delamination and occurrence of oil. If no delamination and occurrence of oil was observed, the system was considered stable.
[0261] Characterization of stability 2
[0262] After the formulations obtained from Comparative examples A and B were left to stand for one week, the sample material was visually observed: if it was uniform, without oil-water separation, and without obvious coarse particle agglomeration, it was considered stable; if it was uneven, with oil-water separation or obvious coarse particle agglomeration, it was considered unstable.
[0263] Characterization of In-vitro SPF
[0264] The in-vitro sun protection factor (in-vitro SPF) of samples was measured by WinSPF software using SPF290AS analyzer from Solar Light Company, LLC. A sample was evenly applied onto a PMMA plate at 1.3 mg / cm2. Once the sample was dried, an SPF290AS analyzer was used to conduct measurements at four designated positions on the PMMA plate, with each measurement being conducted by scanning from 290 nm to 400 nm with an increment of 5 nm in wavelength. The in-vitro SPF value of the WinSPF software was read. Under the same conditions, the reference standard P8 (in-vivo SPF 63) was measured and its in-vitro SPF value in the WinSPF software was read. Based on the ratio of this result to 63, the in-vitro SPF value of the sample in the WinSPF software was converted, and finally the in-vitro SPF report value of the sample was obtained.
[0265] Characterization of water resistance
[0266] 0.5 g of each sample of the composition to be tested was applied to an equal area of artificial skin (model: BIODY Plates 20 #, purchased from Beaulax, Co. LTD) and rinsed with water for 2 minutes. Subsequently, it was observed whether any oil film was retained. If an oil film remained on the surface of the artificial skin, the sample was considered to be water-resistant; conversely, if no oil film remained on the artificial skin surface, the sample was considered not to be water-resistant.
[0267] Evaluation of skin feel
[0268] The skin feel of samples of each composition to be tested was scored in a panel of evaluators using the Tier benchmark method. The scoring method was as follows:
[0269] Skin feel scoring criteria (Tier 1-10, converting to an integer) : the skin feel of the aqueous phase formula was rated as 10 points (very lightweight, water-breaking) , and the skin feel of the oil phase formula was rated as 0 point (very thick and greasy) . A score of 6 or more indicated a water-breaking or lightweight feel, while a score of 5 or less indicated a thick and greasy feel.
[0270] Appearance of materials after being applied
[0271] A sample of each of the composition to be tested was applied onto a BYK light-shielding cardboard 3B (simply referred to as a black and white card) . Appearances thereof, such as water-breaking effect was observed.
[0272] Characterization of UV Protection Loss (in-vitro SPF loss ratio)
[0273] The test employed Solar Light Company, LLC's SPF290AS analyzer and its WinSPF software to determine the in-vitro sun protection factor (SPF) of samples before and after irradiation, thereby evaluating the ultraviolet stability of the formulation.
[0274] (1) Determination of the initial in-vitro SPF
[0275] The sample was uniformly applied onto the surface of a PMMA plate at an application amount of 1.3 mg / cm2.
[0276] After the sample dried, the PMMA plate was placed on the SPF290AS analyzer, and four predetermined measurement spots on the plate were scanned in accordance with the operating requirements of the analyzer (scan wavelength range: 290-400 nm, step size: 5 nm) .
[0277] The in-vitro SPF was directly read by using the WinSPF software and recorded as the initial SPF value of the sample (in-vitro SPF_initial) .
[0278] (2) Light-exposure conditions and determination of the post-irradiation in-vitro SPF
[0279] The same PMMA plate described above was placed under a Solar Simulator (Solar Light Co.) and subjected to an irradiation dose of 12 MED.
[0280] Upon completion of the 12-MED irradiation, the same plate was repositioned on the SPF290AS analyzer, and the same four measurement spots were scanned in the same manner as in the initial test (scan wavelength range: 290-400 nm; step size: 5 nm) .
[0281] The SPF values output by the WinSPF software were recorded as the SPF values of the sample after 12-MED irradiation (in-vitro SPF_12MED) .
[0282] (3) Calculation of the photodegradation rate
[0283] The SPF loss rate of the sample after 12MED irradiation was calculated according to the following formula:
[0284] Where:
[0285] in-vitro SPFinitial denotes the SPF value of the sample before irradiation;
[0286] in-vitro SPF12MED denotes the SPF value of the sample after exposure to 12MED.
[0287] Notes:
[0288] 1: MED: Minimal Erythema Dose. In this in-vitro test, 1 MED is defined as 21 mJ / cm2, as specified by the instrument supplier, Solar Light Co.
[0289] 2: A dose of 12 MED falls within the commonly accepted range used in industry standards and research literature for characterizing the photostability of sunscreen formulations.
[0290] III. Preparation experiments of compositions
[0291] The composition according to Example 1 of the present invention (formula WSP-1) was prepared according to the composition formulas shown in Table 2 below by the following method: water, PEMULENTM TR-1 polymer, PEMULENTM TR-2 polymer, L-ARGININE C-GRADE, and 1, 3 BUTYLENE GLYCOL in the aqueous phase were sequentially added to a main pot, mixed evenly and heated to 80-85 ℃ to obtain the aqueous phase component; the ingredients in the oil phase were added into an auxiliary pot and heated to 80-85 ℃ and mixed evenly for at least 15 minutes to obtain the oil phase component; the oil phase component was then slowly added to the aqueous phase component in the main pot under stirring, and homogenized at 6000-7000 rpm using a homogenizer for 15 minutes, then cooled to 30-40 ℃. The resulting mixture was taken out to obtain the composition.
[0292] The compositions of Examples 2-4 (formulas OT-5, OT-2, OT-3, respectively) were prepared in the same way as in Example 1 except that 900 and KL2 were replaced with the compositions of the oil phase thickeners shown in Table 2, respectively.
[0293] The compositions of Comparative Examples 1-3 (formulas WSP-2, WSP-3, WSP-4, respectively) were prepared in the same way as in Example 1 except that 981 polymer, SEPIMAXTM ZEN, and NF-F were used instead of PEMULENTM TR-1 polymer and PEMULENTM TR-2 polymer, respectively.
[0294] The composition of Comparative Example 4 (formula EM-2) was prepared in the same way as in Example 1 except that a polyglycerol emulsifier BARSOLVE NS-100 having an HLB value greater than 8 was used instead of a polyglycerol emulsifier BARSPERSE-15 having an HLB value less than 8.
[0295] The composition of Comparative Example 5 (formula WSP-1 / P5) was prepared according to the composition formulas shown in Table 2 below by the following method: the ingredients in the oil phase were added to a main pot, heated to 80-85 ℃ and mixed evenly for at least 15 minutes to obtain the oil phase component; water was added into an auxiliary pot and heated to 80-85 ℃; then, water in the auxiliary pot was added to the main pot and homogenized at 6000-7000 rpm using a homogenizer for 15 minutes, then cooled to 30-40 ℃; subsequently, PEMULENTM TR-1 polymer, PEMULENTM TR-2 polymer, L-ARGININE C-GRADE, and 1, 3 BUTYLENE GLYCOL were sequentially added to the main pot, and mixed evenly. The resulting mixture was finally taken out to obtain the composition.
[0296] The composition obtained above was characterized and tested for emulsion type, stability, in vitro SPF value, water resistance and skin feel according to the test methods in Section II respectively.
[0297] Figs. 1A to 1I show microscope pictures of the compositions of Examples 1 to 4 and Comparative Examples 1 to 5 (left: normal light; middle: polarized light) and observation results (right) of the visual appearance of the mixtures obtained by mixing with a dye, respectively. For the compositions of Examples 1-4 and Comparative Examples 3 and 4, a particle shinning phenomenon was observed from the microscope pictures can be seen, and Water Soluble Blue 5 could be completely mixed into the samples in the mixing experiments, indicating that they were in the O / W emulsion type, wherein the compositions of Examples 1 to 4 and Comparative Example 3 were in the form of a dual-gel and the composition of Comparative Example 4 was in the form of an emulsion. In contrast, for the compositions of Comparative Examples 1-2 and 5, no particle shinning phenomenon was observed from the microscope pictures under the polarized light field, and Water Soluble Blue 5 failed to be completely mixed into the samples in the dye mixing experiments, indicating that they were in the form of W / O emulsion. The emulsion type results shown in Figs. 1A to 1I were summarized in Table 2.
[0298] Fig. 2A shows, from left to right, pictures of the visual appearance of the compositions of Example 1, Comparative Example 1, Comparative Example 2, Comparative Example 3, Example 2, Example 3, Example 4, Comparative Example 4, and Comparative Example 5 after storage at 50 ℃ for 4 weeks. Fig. 2B shows, from left to right, enlarged views of the pictures of visual appearance of the compositions of Comparative Example 2, Comparative Example 3, and Comparative Example 5 after storage at 50 ℃ for 4 weeks. It can be seen that the composition of Comparative Example 3 (formula WSP-4) showed obvious delamination after storage at 50 ℃for 4 weeks, the composition of Comparative Example 2 (formula WSP-3) and the composition of Comparative Example 5 (formula WSP-1 / P5) showed occurrence of oil at the top after storage at 50 ℃ for 4 weeks, and the remaining compositions showed no delamination or occurrence of oil even after storage at 50 ℃ for 4 weeks, indicating that the compositions of Comparative Examples 2, 3 and 5 were unstable after storage at 50 ℃ for 4 weeks, and the remaining compositions behaved as a stable system. The stability results shown in Figs. 2A and 2B were summarized in Table 2.
[0299] Fig. 3 shows the test results of water resistance for individual compositions, wherein the three pictures in the first row correspond from left to right to the compositions of Example 1, Comparative Example 4, and Comparative Example 5, respectively, the three pictures in the second row correspond from left to right to the compositions of Comparative Examples 1 to 3, respectively, and the three pictures in the third row correspond from left to right to the compositions of Examples 2 to 4, respectively. It can be seen that Comparative Example 4 (formula EM-2) , similar to a conventional O / W emulsion, did not leave an oil film on the surface of the artificial skin after being rinsed with water, indicating that the composition was not water resistant. In contrast, an oil film was left on the surface of the artificial skin for all of the rest of the compositions. Particularly, although the compositions of Examples 1 to 4 according to the present invention were in the O / W emulsion type, a white oil film was left on the surface of the artificial skin after being rinsed with water, indicating that they were water resistant. The water resistance results shown in Fig. 3 were summarized in Table 2.
[0300] The skin feel evaluation results of each composition were summarized in Table 2.
[0301] Fig. 4 shows the observation results of the material appearance for individual compositions after being applied, wherein the five pictures in the first row correspond from left to right to the compositions of Example 1, Comparative Example 1, Comparative Example 2, Comparative Example 3, and Comparative Example 5, respectively, and the four pictures in the second row correspond from left to right to the compositions of Example 2, Example 3, Example 4, and Comparative Example 4, respectively. It can be seen that the compositions according to Examples 1 and 4 of the present invention (formulas WSP-1 and OT-3, respectively) presented a distinctly lightweight and water-breaking appearance; the compositions according to Examples 2 and 3 of the present invention (formulas OT-5 and OT-2, respectively) also presented a certain water-breaking feel; the compositions of Comparative Examples 1 and 2 (formulas WSP-2 and WSP-3, respectively) presented a distinctly sticky and thick appearance; the composition of Comparative Example 3 (formulas WSP-4) was found to present a rough appearance after being smeared, and the composition of Comparative Example 4 (formulas EM-2) was relatively homogeneous in appearance, and the two presented a weak water-breaking feel; and the composition of Comparative Example 5 (formula WSP-1 / P5) presented a very remarkable creamy appearance and was very thick. From the above, it can be seen that the evaluation results of the above material appearance were completely consistent with the skin feel evaluation results listed in Table 2.
[0302] As can be seen from Table 2 above, the compositions in the oil-in-water dual-gel form according to Examples 1-4 of the present invention showed a combination of good stability, excellent SPF effect (being compatible with both organic UV filters and inorganic UV filters) , and good water resistance, and presented an improved lightweight and water-breaking skin feel at the same time, as compared with the compositions of Comparative Examples 1-5. In contrast, the compositions of Comparative Examples 1-5 which did not meet the composition and form of the present invention failed to meet the above performance requirements at the same time.
[0303] In particular, Example 1 was a composition in the form of an oil-in-water dual-gel having the composition according to the invention; Comparative Examples 1-3 differed from Example 1 only in that Example 1 employed a crosslinked polymer of acrylates (esters) / C10-30 alkyl acrylate as the aqueous phase thickener, while Comparative Examples 1-3 employed other types of aqueous phase thickeners; Comparative Example 4 differed from Example 1 only in that Example 1 employed a polyglycerol emulsifier having an HLB value less than 8, while Comparative Example 4 employed a polyglycerol emulsifier having an HLB value greater than 8; Comparative Example 5 differed from Example 1 in that the aqueous phase was added to the oil phase during the preparation of the composition of Comparative Example 5, while the oil phase was added to the aqueous phase during the preparation of the composition of Example 1, and as a result, the composition obtained in Comparative Example 5 was a water-in-oil emulsion, while the composition obtained in Example 1 was an oil-in-water dual-gel. From the results in Table 2 above, it can be seen that, as compared with the compositions of Comparative Examples 1 to 5, the composition of Example 1 showed a combination of good stability, excellent SPF effect (being compatible with both organic UV filters and inorganic UV filters) , good water resistance, and improved skin feel.
[0304] Further, it can be seen from the comparison among Examples 1-4 that the compositions of Examples 1-4 differed in composition only by the use of different oil phase thickener systems. It was unexpectedly found that the composition of Example 4 where dextrin palmitate was used as the oil phase thickener achieved a further improved SPF effect and skin feel, as compared with the compositions of Examples 1-3 where other oil phase thickener systems were used.
[0305] According to the formulation shown in Table 3, a composition of Example A of the present invention (Formulation UL-24) was prepared by the following method:
[0306] (1) Water, PEMULENTM TR-1 polymer, PEMULENTM TR-2 polymer, L-ARGININE C-GRADE, 1, 3-BUTYLENE GLYCOL, and LIPOXOL 400 MED were sequentially added to the main vessel, mixed thoroughly, and heated to 45-85 ℃ to obtain the aqueous phase; (2) The oil-phase ingredients were added to an auxiliary vessel, heated to 60-90 ℃, and mixed uniformly for at least 15 minutes to obtain the oil phase; (3) At 45-85 ℃, the oil phase was added to the aqueous phase in the main vessel, followed by homogenization at 3000-8000 rpm for 15-30 minutes; (4) The mixture was cooled to below 25-35 ℃, after which a chelating agent such as DISODIUM EDTA RONACARE and a water-soluble preservative such as SODIUM BENZOATE were added, followed by the addition of POLYACRYLATE CROSSPOLYMER-6, and the mixture was homogenized until uniform; (5) The mixture was further cooled to room temperature to obtain the final composition.
[0307] The compositions of Examples B, C, D, E, F, G, H, and I (corresponding to Formulations UL-25, UL-2, UL-3, UL-4, UL-5, UL-28, UL-29, and UL-30, respectively) were prepared in the same manner as Example A (Formulation UL-24) , except that the amount of POLYACRYLATE CROSSPOLYMER-6 was added according to the values shown in Table 3.
[0308] The compositions of Comparative Example J, Examples K, L, M, and N (corresponding to Formulations UL-6, UL-7, UL-12, UL-16, and UL-17, respectively) were prepared in the same manner as Example E (Formulation UL-4) , except that the oil-phase ingredients were added according to the values shown in Table 3.
[0309] The compositions of Comparative Examples A, B, and C (corresponding to Formulations UL-1, UL-9, and UL-11, respectively) were prepared in the same manner as Example A (Formulation UL-24) , except that the amounts of PEMULENTM TR-1 polymer, PEMULENTM TR-2 polymer, and POLYACRYLATE CROSSPOLYMER-6 were added according to the values shown in Table 3.
[0310] The resulting compositions were then subjected to the characterization tests described in Part II to evaluate dosage form properties and ultraviolet protection loss.
[0311] As shown for Comparative Example A (Formulation UL-1) , an oil-in-water dual-gel containing 0.3%of the combined PEMULENTM TR-1 polymer / PEMULENTM TR-2 polymer (total amount) exhibited the following characteristics. Visual inspection (Figure 7) showed a smooth and uniform appearance without oil-water separation and without large particle agglomeration, indicating good macroscopic stability. Microscopic observation (Figure 5) revealed well-defined particles; although occasional larger particles were present, the majority were relatively uniform, further confirming that the system was in a stable state without oil-water separation. In addition, based on normal-light and polarized-light microscopy, the continuous phase was identified as water, indicating an O / W-type dual-gel. Upon characterization of UV protection loss (in-vitro SPF loss ratio) , the UV protection loss ratio was 33.32%after 12-MED irradiation.
[0312] In comparison, as shown for Comparative Example B (Formulation UL-9) , a bicontinuous dual-gel containing 0.3%POLYACRYLATE CROSSPOLYMER-6 exhibited the following behavior. Visual inspection (Figure 7) showed a non-uniform appearance; although no oil-water separation occurred, noticeable large-particle agglomeration was present, indicating limited macroscopic stability. Microscopic observation (Figure 6) showed that the particles in UL-9 were poorly formed, and the oil and water phases were in a state approaching separation, indicating a highly unstable structure. The UV protection loss ratio was 15.89%, demonstrating better UV protection performance than the PEMULENTM TR-1 / TR-2 polymer system.
[0313] As shown for Comparative Example C (Formulation UL-11) , increasing the amount of POLYACRYLATE CROSSPOLYMER-6 further reduced the UV protection loss ratio. When the amount of POLYACRYLATE CROSSPOLYMER-6 was increased to 0.8%, the loss ratio decreased to 0.62%.
[0314] As shown for the compositions of Examples A, B, C, D, E, F, G, H, and I (corresponding to Formulations UL-24, UL-25, UL-2, UL-3, UL-4, UL-5, UL-28, UL-29, and UL-30, respectively) , when PEMULENTM TR-1 polymer / PEMULENTM TR-2 polymer was used in combination with POLYACRYLATE CROSSPOLYMER-6, the system not only formed a stable oil-in-water dual-gel, but also exhibited a continuous decrease in UV protection loss ratio. As the amount of POLYACRYLATE CROSSPOLYMER-6 increased, the UV protection loss ratio eventually became negative, indicating an unexpected enhancement in UV protection performance (i.e., a “net gain rather than a loss” ) , demonstrating excellent UV stability of the system.
[0315] As shown for the compositions of Comparative Example J、Examples K、L、M and N (corresponding to Formulations UL-6, UL-7, UL-12, UL-16, and UL-17, respectively) , when specific ratio of PEMULENTM TR-1 polymer / PEMULENTM TR-2 and POLYACRYLATE CROSSPOLYMER-6 were used, different kinds of oil-phase ingredients can all get stability for not only structure, but also UV.
[0316] The above-described are only exemplary embodiments of the present invention. It should be noted here that, for those skilled in the art, modifications may be made to the present invention without departing from the inventive concept of the invention, but these fall within the protection scope of the present invention.
Claims
1.A dual-gel composition comprising a dual-gel structure including an aqueous phase gel and an oil phase gel, wherein the composition includes the following components:(1) a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer as an aqueous phase thickener;(2) an oil phase thickener comprising one or more selected from the group comprising the following: (i) cellulose-based materials; (ii) dextrin / inulin fatty acid esters; (iii) glutamic acid and derivatives thereof; (iv) eicosanedioic acid and derivatives thereof; (v) polyamides; (vi) isophorone diisocyanate (IPDI) copolymers or sebacic acid copolymers; (vii) crosslinked polymers containing repeating units derived from hexamethylene-1, 6-diisocyanate (HDI) and trimethylolhexyllactone; (viii) hydroxystearic acid and derivatives thereof; (ix) polybutene; (x) waxes; (xi) sorbitan esters; and (xii) sucrose fatty acid esters;(3) a polyglycerol emulsifier having an HLB value of 0 to 8; and(4) a solvent.2.The dual-gel composition of claim 1, wherein the composition comprises a dual-gel structure including a continuous aqueous phase gel and a dispersed oil phase gel.3.The dual-gel composition of claim 1, wherein the continuous aqueous phase gel comprises an aqueous phase thickener, and the dispersed oil phase gel comprises an oil phase thickener.4.The dual-gel composition of claim 1, wherein the average particle size of the dispersed oil phase gel is 0.1-50 μm.5.The dual-gel composition of claim 1, wherein the composition exhibits a dual-gel structure with a continuous aqueous phase and dispersed oil phase when observed under a polarized light microscope.6.The dual-gel composition of claim 1, wherein the dual-gel structure is an oil-in-water dual-gel structure.7.The dual-gel composition of claim 1, wherein the composition to exhibit improved UV stability upon UV irradiation.8.The dual-gel composition of claim 1, wherein the continuous aqueous phase gel and the dispersed oil phase gel are physically combined to form the dual-gel structure.9.The dual-gel composition of claim 1, wherein under UV irradiation conditions, the SPF loss rate of the composition is not higher than 5%.10.The dual-gel composition of claim 1, wherein:the cellulose-based material comprises ethyl cellulose;the dextrin / inulin fatty acid ester is one or more selected from the group comprising the following: dextrin palmitate and stearoyl inulin;the glutamic acid and derivatives thereof is one or more selected from the group comprising the following: dibutyl lauroyl glutamate and dibutyl ethylhexyloyl glutamate;the eicosanedioic acid and derivatives thereof is one or more selected from the group comprisingthe following: glycerol tris (behenic acid / isostearic acid / eicosanedioic acid) ester, glycerol behenate / eicosadioate;the polyamide is one or more selected from the group comprising the following: polyamide-8 and polyamide-3;the isophorone diisocyanate (IPDI) copolymer or sebacic acid copolymer is one or more selected from the group comprising the following: castor oil / IPDI copolymer and hydrogenated castor oil / sebacic acid copolymer;the crosslinked polymer containing repeating units derived from hexamethylene-1, 6-diisocyanate (HDI) and trimethylolhexyllactone is one or more selected from the group comprising the following: caprylic / capric triglyceride, hydrogenated poly (C6-20 olefin) and crosslinked polymers of HDI / trimethylolhexyllactone;the hydroxystearic acid and derivatives thereof is one or more selected from the group comprising the following: trihydroxystearin, 9-hydroxystearic acid, 10-hydroxystearic acid, and 12-hydroxystearic acid;the polybutene is selected from one or more polybutenes with a kinematic viscosity of 11 to 45,000 centistokes as measured at 100 ℃ according to ASTM D445A;the wax is one or more selected from the group comprising the following: paraffin wax, microcrystalline wax, ozokerite, synthetic wax, polyethylene, glyceryl tribehenate, and glycerol behenate;the sucrose fatty acid ester is obtained by esterification of sucrose with fatty acids, the fatty acids being selected from one or more of C12-C22, including saturated and mono / polyunsaturated fatty acids, the sucrose fatty acid ester having an HLB value of 1 to 8 is selected from one or more of the group comprising the following: sucrose stearate, sucrose palmitate, sucrose laurate, and sucrose oleate, andthe sorbitan ester comprises sorbitan oleate, preferably comprising one or more selected from sorbitan oleate and dextrin palmitate.11.The dual-gel composition of any one of claims 1-10, wherein the content of the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer is 0.05 to 5.00%by weight, based on the total weight of the composition.12.The dual-gel composition of any one of claims 1-10, wherein the content of the oil phase thickener is 0.10 to 15.00%by weight, based on the total weight of the composition.13.The dual-gel composition of any one of claims 1-10, wherein the oil phase thickener comprises or is a dextrin / inulin fatty acid ester, and the content of the dextrin / inulin fatty acid ester is 0.10 to 15.00%by weight, based on the total weight of the composition.14.The dual-gel composition of any one of claims 1-10, wherein the oil phase thickener comprises or is a sorbitan ester, and the content of the sorbitan ester is 0.10 to 4.00%by weight, based on the total weight of the composition.15.The dual-gel composition of any one of claims 1-10, wherein the oil phase thickener comprises or is polybutene and sorbitan olivate, and the content of polybutene is 0.10 to 4.00%by weight, and the content of sorbitan olivate is 0.10 to 4.00%by weight, based on the total weight of the composition.16.The dual-gel composition of any one of claims 1-10, wherein the oil phase thickener comprises or is sorbitan olivate and dextrin palmitate, and the content of sorbitan olivate is 0.10 to 4.00%by weight, and the content of dextrin palmitate is 0.10 to 10.00%by weight, based on the total weight of the composition.17.The dual-gel composition of any one of claims 1-10, wherein the content of the polyglycerol emulsifier is 0.01 to 8.00%by weight, based on the total weight of the composition.18.The dual-gel composition of any one of claims 1-10, wherein the content of the solvent is 30.0 to 99.8%by weight, based on the total weight of the composition.19.The dual-gel composition of any one of claims 1-18, wherein the solvent comprises water and a hydrophobic solvent, wherein the content of water is 20 to 80%by weight, and the content of the hydrophobic solvent is 0.5 to 20%by weight, based on the total weight of the composition.20.The dual-gel composition of claim 19, wherein the hydrophobic solvent is one or more selected from the group comprising the following:a) esters of saturated and / or unsaturated, branched and / or unbranched alkanecarboxylic acids having a chain length of 3 to 30 carbon atoms with saturated and / or unsaturated, branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms,b) esters of aromatic carboxylic acids with saturated and / or unsaturated, branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms,c) alkyl benzoates,d) lecithin and triglycerides of fatty acids, i.e. triglycerides of saturated and / or unsaturated, branched and / or unbranched alkanecarboxylic acids having a chain length of 8 to 24 carbon atoms,e) dialkyl ethers and dialkyl carbonates,f) saturated or unsaturated, branched or unbranched alcohols, andg) amino acid alkyl esters, particularly alkyl lauroylsarcosinates, such as isopropyl lauroylsarcosinate.21.The dual-gel composition of any one of claims 1-18, further comprising a UV filter, which preferably comprises an organic UV filter and an inorganic UV filter, wherein the organic UV filter is preferably one or more selected from the group comprising the following: alkyl alkoxycinnamateesters such as C2-C10 alkyl C1-C10 alkoxycinnamates, bis-ethylhexoxyphenol methoxyphenyl triazine, hexyl diethylaminohydroxybenzoylbenzoate, 3-benzylidene camphor, 4-methylbenzylidene camphor, benzophenone-3, butylmethoxydibenzoylmethane, diethylhexylbutyramidotriazinone, ethylhexyl dimethyl PABA, ethylhexyl methoxycinnamate, ethylhexyl salicylate, ethylhexyltriazinone, humosalate, isoamyl p-methoxycinnamate, methylene bis-benzotriazolyl tetramethylbutylphenol, octocrylene, PEG-25 p-aminobenzoic acid, polyacrylamide methylbenzylidene camphor, polysiloxane-15, benzophenone-4, benzophenone-5, benzylidene camphor sulfonic acid and salts thereof, camphor benzalkonium methosulfate, disodium phenyl dibenzimidazole tetrasulfonate, phenylbenzimidazole sulfonic acid and potassium, sodium and triethanolamine salts thereof, and terephthalylidene dicamphor sulfonic acid and salts thereof;the inorganic UV filter is preferably one or more selected from the group comprising the following:pigments formed from metal oxides such as titanium dioxide, zinc oxide, iron oxide, zirconia or cerium oxide,the content of the UV filter is preferably 0.1 to 30.0%by weight, based on the total weight of the composition.22.The dual-gel composition of any one of claims 1-18, further comprising a neutralizing agent having a basic group, wherein the neutralizing agent is one or more selected from the group comprising the following: arginine, sodium hydroxide, potassium hydroxide, sodium citrate, triethanolamine, tromethamine, and aminomethylpropanol, preferably arginine, triethanolamine, tromethamine, and aminomethylpropanol, more preferably arginine, in particular, the content of the neutralizing agent is 0.01 to 5.00%by weight, based on the total weight of the composition.23.The dual-gel composition of any one of claims 1-18, further comprising one or more components selected from the group comprising the following:ascorbic acid and derivatives thereof, such as ascorbyl tetraisopalmitate, L-ascorbic acid 2-glucoside vitamin C;resorcinol and derivatives thereof;enzymes;humectants such as hyaluronic acid and salts thereof, protein hydrolysates, and polyols such as butylene glycol, propylene glycol, glycerol, dipropylene glycol, and diglycerol and the like; polyethylene glycol;recombinant collagens;natural extracts;anti-inflammatory agents;oligomeric proanthocyanidins;vitamins, such as vitamin A (retinol) , vitamin E (tocopherol) , vitamin B5 (panthenol) , vitamin B3 (nicotinamide) , their derivatives (particularly esters) , and mixtures thereof;resveratrol;BHT;ceramides;and psuedoceramides;esters of amino acids, such as myristoylmethyl β-alanine (phytosterol / decyltetradecyl) ester;cholesterol and derivatives thereof, such as 7-dehydrocholesterol;steroids;urea;caffeine;depigmenting agents such as kojic acid, hydroquinone, and caffeic acid;salicylic acid and derivatives thereof;α-hydroxy acids such as lactic acid, glycolic acid, and derivatives thereof;retinoids such as carotenoids and derivatives of vitamin A;hydrocortisone;melatonin;extracts of algae, fungi, plants, yeasts, bacteria, such as extracts of licorice, including potassium glycyrrhizinate, glabridin, enoxolone, licochalcone and the like; ;antibacterial active agents such as 2, 4, 4'-trichloro-2'-hydroxydiphenyl ether (or triclosan) , 3, 4, 4'-trichlorocarbanilide (or triclocarban) and the acids mentioned above, particularly salicylic acid and derivatives thereof;matting agents, such as fibers;tensioning agents.24.The dual-gel composition of any one of claims 1-18, wherein the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer comprises a structural unit derived from the following monomers:- 95.9 to 98.8%by weight of an ethylenically unsaturated carboxylic acid monomer which is one or more selected from the group comprising acrylic acid, methacrylic acid, and ethyl acrylic acid;- 1 to 3.5%by weight of acrylate compounds having the following formula,wherein R is alkyl having from 10 to 30 carbon atoms, and R1 is hydrogen, , methyl, or ethyl; and- optionally, 0.1 to 0.6%by weight of a cross-linking agent, such as an alkenyl ether and / or (C1-C2 alkyl) acrylate of a polyol, which has more than two polymerizable alkenyl groups and / or (C1-C2 alkyl) acrylate groups per molecule, wherein the polyol comprises at least 3 carbon atoms and at least 2 hydroxyl groups, for example at least 3 hydroxyl groups, the polyol is, for example, an alkylene polyol or an alkylene oxide adduct of an alkylene polyol.25.The dual-gel composition of any one of claims 1-18, wherein the aqueous phase thickener is an aqueous phase emulsifying thickener, and / or the oil phase thickener is an oil phase emulsifying thickener.26.The dual-gel composition of any one of claims 1-18, wherein the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer is a crosslinked copolymer.27.The dual-gel composition of any one of claims 1-18, comprising:(1) 0.05 to 5.00%by weight of the (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer, preferably a crosslinked copolymer of (C1-C2 alkyl) acrylic acid / C10-C30 alkyl acrylate;(2) 0.10 to 10.00%by weight of dextrin palmitate;(3) optionally, 0.10 to 4.00%by weight of sorbitan olivate;(4) optionally, 0.10 to 4.00%by weight of polybutene;(5) 0.01 to 8.00%by weight of the polyglycerol emulsifier having an HLB value of 0 to 8;(6) optionally, 0.1-30.00%by weight of the UV filter;(7) optionally, 0.01-5.00%by weight of arginine;(8) optionally, 0.5-20%by weight of the hydrophobic solvent; and(9) 20-80%by weight of water.28.The dual-gel composition of any one of claims 1-18, for use in a cosmetic composition, particularly a sunscreen composition.29.The dual-gel composition of any one of claims 1-18, further comprising a polyacrylate crosspolymer-6.30.The dual-gel composition of claim 29, wherein the polyacrylate crosspolymer-6 is added in an amount of 0.05 to 2.00%by weight, based on the total weight of the composition.31.The dual-gel composition of claim 29, wherein the weight ratio of the (C1-C2 alkyl) acrylic acid / acrylic acid C10-C30 alkyl ester crosslinked copolymer and the polyacrylate crosspolymer-6 is from 0.3: 1 to 8: 1 by weight.32.The dual-gel composition of any one of claims 1-18, further comprising a UV filter.33.The dual-gel composition of claim 32, wherein the UV filter is added in an amount of 0.1 to 30.0%by weight, based on the total weight of the composition.34.The dual-gel composition of any one of claims 1-18, further comprising a photostable enhancer.35.The dual-gel composition of claim 34, wherein the photostable enhancer is added in an amount of 0.05-10%by weight, based on the total weight of the composition.36.A method for preparing the dual-gel composition of any one of claims 1-35, comprising the following steps:i) mixing water, a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer, and optionally a neutralizing agent to obtain an aqueous phase component;ii) mixing an oil phase thickener, a polyglycerol emulsifier, optionally a hydrophobic solvent, optionally an oil-soluble active agent and / or optionally a UV filter to obtain an oil phase component; andiii) adding the oil phase component to the aqueous phase component and mixing to obtain the dual-gel composition.37.The method for preparing the dual-gel composition of claim 36, further comprises the following step:iv) based on step iii) , adding polyacrylate crosspolymer-6 to obtain a dual-gel composition with good UV stability.38.A dual-gel composition prepared by the method of claim 36 or claim 37.39.Use of the dual-gel composition of any one of claims 1-38 for preparing cosmetics, particularly sunscreen cosmetics.40.The use of claim 39, wherein the sunscreen cosmetic comprises a UV filter, preferably an inorganic UV filter, and most preferably a combination of inorganic and organic UV filters.41.A sunscreen composition comprising the following components:(1) a (C1-C2 alkyl) acrylic acid / C10-C30 alkyl (C1-C2 alkyl) acrylate copolymer as an aqueous phase thickener;(2) a polyacrylate crosspolymer-6;(3) an oil phase thickener;(4) a polyglycerol emulsifier having an HLB value of 0 to 8, preferably 1 to 8, more preferably 3 to 8;(5) a UV filter;(6) a solvent.42.The sunscreen composition of claim 41, wherein the UV filter comprises an inorganic UV filter, preferably a combination of inorganic and organic UV filters.43.The sunscreen composition of claim 42, further comprising a photostable enhancer, preferably a water-soluble polar solvent, more preferably one or more selected from the group comprising polyol derivatives, polyether compounds, and polyethylene glycols, and further preferably polyethylene glycols with a molecular weight < 700.44.The sunscreen composition of claim 43, wherein the oil phase thickener comprising one or more selected from the group comprising the following: (i) cellulose-based materials; (ii) dextrin / inulin fatty acid esters; (iii) glutamic acid and derivatives thereof; (iv) eicosanedioic acid and derivatives thereof; (v) polyamides; (vi) isophorone diisocyanate (IPDI) copolymers or sebacic acid copolymers; (vii) crosslinked polymers containing repeating units derived from hexamethylene-1, 6-diisocyanate (HDI) and trimethylolhexyllactone; (viii) hydroxystearic acid and derivatives thereof; (ix) polybutene; (x) waxes; (xi) sorbitan esters; and (xii) sucrose fatty acid esters.45.The sunscreen composition of claim 44, wherein:the cellulose-based material comprises ethyl cellulose;the dextrin / inulin fatty acid ester is one or more selected from the group comprising the following: dextrin palmitate and stearoyl inulin;the glutamic acid and derivatives thereof is one or more selected from the group comprising the following: dibutyl lauroyl glutamate and dibutyl ethylhexyloyl glutamate;the eicosanedioic acid and derivatives thereof is one or more selected from the group comprisingthe following: glycerol tris (behenic acid / isostearic acid / eicosanedioic acid) ester, glycerol behenate / eicosadioate;the polyamide is one or more selected from the group comprising the following: polyamide-8 and polyamide-3;the isophorone diisocyanate (IPDI) copolymer or sebacic acid copolymer is one or more selected from the group comprising the following: castor oil / IPDI copolymer and hydrogenated castor oil / sebacic acid copolymer;the crosslinked polymer containing repeating units derived from hexamethylene-1, 6-diisocyanate (HDI) and trimethylolhexyllactone is one or more selected from the group comprising the following: caprylic / capric triglyceride, hydrogenated poly (C6-20 olefin) and crosslinked polymers of HDI / trimethylolhexyllactone;the hydroxystearic acid and derivatives thereof is one or more selected from the group comprising the following: trihydroxystearin, 9-hydroxystearic acid, 10-hydroxystearic acid, and 12-hydroxystearic acid;the polybutene is selected from one or more polybutenes with a kinematic viscosity of 11 to 45,000 centistokes as measured at 100 ℃ according to ASTM D445A;the wax is one or more selected from the group comprising the following: paraffin wax, microcrystalline wax, ozokerite, synthetic wax, polyethylene, glyceryl tribehenate, and glycerol behenate;the sucrose fatty acid ester is obtained by esterification of sucrose with fatty acids, the fatty acids being selected from one or more of C12-C22, including saturated and mono / polyunsaturated fatty acids, the sucrose fatty acid ester having an HLB value of 1 to 8 is selected from one or more of the group comprising the following: sucrose stearate, sucrose palmitate, sucrose laurate, and sucrose oleate, andthe sorbitan ester comprises sorbitan oleate, preferably comprising one or more selected from sorbitan oleate and dextrin palmitate.