Water-in-oil sunscreen cosmetics

Abstract

To provide water-in-oil sunscreen cosmetics that exhibit outstanding resistance to sweat despite its ease of washing away, and also demonstrate excellent water resistance and minimal secondary adhesion.SOLUTION: Water-in-oil sunscreen cosmetics include following components (A)-(D): (A) an alkyl polyether-modified silicone with a siloxane dendron structure; (B) at least one selected from dextrin fatty acid esters, amino acid-based gelators, and polyurethane-79; (C) a UV protection agent; and (D) an oil-soluble film-forming agent without silicone skeletons.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a water-in-oil type sunscreen cosmetic, and more particularly to a water-in-oil type sunscreen cosmetic that, by containing specific ingredients, achieves both ease of washing and sweat resistance, and in addition, excellent water resistance and secondary adhesion prevention effect. [Background technology]

[0002] Protecting the skin from the harmful effects of ultraviolet (UV) radiation is generally one of the important challenges in skincare. Various studies are being conducted to minimize the adverse effects of UV radiation on the skin. For example, a method of protecting the skin from UV radiation by covering it with a coating containing UV absorbers or UV scatterers has been reported (Non-Patent Literature 1).

[0003] Furthermore, in order to maintain the effect of preventing ultraviolet rays, there is a high demand for water resistance, and many products labeled as "waterproof" or "super waterproof" are being sold. The "waterproof" or "super waterproof" label can be applied after water resistance testing is conducted according to methods compliant with the FDA (U.S. Food and Drug Administration) or COLIPA (European Cosmetics Industry Association), and the product meets the standards.

[0004] In water-in-oil sunscreen cosmetics, particularly excellent water resistance is required, and conventionally, hydrophobic treated zinc oxide, titanium dioxide, and other pigments, as well as water-in-oil emulsion cosmetics with oil as the main component, have been used for water repellency.

[0005] In water-in-oil type sunscreen cosmetics, it has become common practice to incorporate silicone oils or resin components that offer a lighter feel and higher water-repellent effect than ordinary oils in order to improve water resistance. While the inclusion of these components improves water resistance, it has the drawback that they remain on the product after use, making it difficult to easily wash them off with ordinary facial cleansers, thus requiring the use of a dedicated cleansing product.

[0006] Furthermore, while water resistance is an indicator of how well a product can withstand water, water resistance does not necessarily mean it is sweat-resistant. Although water resistance and sweat resistance are often confused, our research has shown that there is no correlation between them. Since sunscreen is often used during the summer, high sweat resistance is also required, highlighting a new challenge for sunscreens.

[0007] One reason why there is no correlation between water resistance and sweat resistance is thought to be the presence or absence of salt in the water. When imparting sweat resistance, it is necessary to impart not only water resistance but also salt resistance; otherwise, the coating film will break down due to salt, and the cosmetic film cannot be maintained. However, when measures such as incorporating highly salt-resistant water-soluble polymers are taken to impart sweat resistance, a strong film is formed against ionic surfactants such as soap, making it difficult to achieve both sweat resistance and ease of washing.

[0008] Technologies have been disclosed to enhance water resistance and ease of washing, including a water-in-oil emulsion cosmetic containing hydrophobized inorganic powder that improves makeup longevity and ease of washing by combining volatile silicone, polyether-modified silicone, unsaturated fatty acid ester, and water, and a sunscreen emulsion cosmetic containing hydrophobized zinc oxide powder that improves ease of washing by combining volatile silicone, liquid paraffin and / or isononyl isononanoate, a nonionic surfactant, and water (Patent Documents 1 and 2). However, neither of these technologies possessed sufficient salt resistance, and the challenge of achieving both ease of washing and salt resistance has not been solved.

[0009] Furthermore, in recent years, due to the increased use of masks and the need for longer-lasting sunscreen effects, there has been a demand for cosmetics that prevent them from adhering to clothing (secondary adhesion-free effect). Technologies to enhance the secondary adhesion-free effect have been disclosed, such as incorporating large amounts of components that evaporate at room temperature, such as volatile silicone oils, volatile hydrocarbon oils, volatile hydrofluoroethers, and water, to provide quick-drying properties, or combining them with oil-soluble film-forming agents such as hard, non-transferable silicone resins (Patent Documents 3 and 4). However, these are difficult to wash off with ordinary detergents, and require special cleansing agents for removal, making the process cumbersome and posing a challenge in achieving both ease of washing and effectiveness.

[0010] On the other hand, a water-in-oil emulsion composition is disclosed (Patent Document 5) which is a water-in-oil emulsion composition containing a diglycerin derivative-modified silicone, water, and a liquid oil, and is extremely useful as a surfactant or dispersant, as an alkyl polyether-modified silicone having a siloxane dendron structure (A). More specifically, the composition contains a diglycerin derivative-modified silicone as a water-in-oil emulsifier, an organically modified clay mineral (bentone 38V) as an oil-soluble gelling agent, octyl methoxycinnamate and octylsilane-treated titanium dioxide as UV protection agents, and silicone-based film-forming agents (acrylates / polytrimethylsiloxy methacrylate) copolymer and trimethylsiloxysilicate as oil-soluble film-forming agents. The resulting W / O type liquid foundation has no unpleasant odor, exhibits excellent emulsification stability during use, has superior water resistance and makeup longevity, minimizes the appearance of skin texture and wrinkles, has a light feel, and provides excellent adhesion and long-lasting moisturizing effects. However, Issues related to the performance required for water-in-oil type sunscreen cosmetics, such as ease of washing off, sweat resistance, and secondary adhesion prevention, have not been considered.

[0011] From the above, it was urgent to develop a water-in-oil sunscreen cosmetic excellent in rinsability, water resistance, sweat resistance, and anti-reattachment effect.

Prior Art Documents

Non-Patent Documents

[0012]

Non-Patent Document 1

Patent Documents

[0013]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0014] The present invention has been made in view of the above prior art, and particularly aims to provide a water-in-oil sunscreen cosmetic that can achieve both easy rinsability and sweat resistance, and in addition, is excellent in water resistance and anti-reattachment effect.

Means for Solving the Problems

[0015] In order to achieve the above object, as a result of intensive research by the present inventor, the following components (A) to (D) (A) An alkyl-polyether-modified silicone having a siloxane dendron structure (B) One or more selected from dextrin fatty acid ester, amino acid-based gelling agent, polyurethane-79 (C) UV protectant (D) Oil-soluble film-forming agent不含シリコーン骨格 By providing an oil-in-water sunscreen cosmetic containing the above, it was found that the above problems can be solved, and the present invention has been completed.

Effects of the Invention

[0016] According to the present invention, it is possible to provide an oil-in-water sunscreen cosmetic that can achieve both easy rinsability and sweat resistance, and in addition, has excellent water resistance and anti-redeposition effect.

Best Mode for Carrying Out the Invention

[0017] Hereinafter, the present invention will be described in more detail. Unless otherwise noted, when the blending amount of a component is expressed as "%" below, it means mass%.

[0018] 注:原文中“不含シリコーン骨格”表述不太准确,推测是“不含硅氧烷骨架”,翻译为“不含silicone skeleton” ,这里为了符合翻译要求,按照原文逐字翻译为“不含シリコーン骨格” 。你可根据实际情况调整。The component (A) alkyl-polyether modified silicone having a siloxane dendron structure used in the present invention is generally used for dispersing ultraviolet scattering agents and pigments, or as a water-in-oil emulsifier. Component (A) refers to a siloxane skeleton having an alkyl chain, a polyether group, and a siloxane dendron group in its side chains. The siloxane skeleton refers to the silicone chain, and examples include dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, and methylhydrogenpolysiloxane. The length of the silicone chain is not particularly limited and may be of a size commonly used in cosmetics, etc. The alkyl group of the side chain is not particularly limited, but a side chain with 9 to 18 carbon atoms is preferable. The number of polymerization units of the polyoxyethylene and polyglycerin in the polyether group is not particularly limited, but 2 to 5 is preferable, and polyglycerin groups are more preferable. The siloxane dendron group of the side chain is not particularly limited, but trimethylsiloxy groups are preferable. Specifically, examples include lauryl PEG-10 tris(trimethylsiloxy)silylethyl dimethicone and cetyl diglyceryl tris(trimethylsiloxy)silylethyl dimethicone, with cetyl diglyceryl tris(trimethylsiloxy)silylethyl dimethicone being particularly preferred.

[0019] The amount of component (A) alkyl polyether-modified silicone having a siloxandendron structure in the water-in-oil type sunscreen cosmetic of the present invention is not particularly limited, but is between 0.1% by mass and 8.0% by mass, with 0.5% by mass and 5.0% by mass being more preferable. Within this range, excellent sweat resistance, ease of washing off, and secondary adhesion-free effect are achieved.

[0020] Component (A) may be used alone or in a mixture of two or more components.

[0021] The component (B) used in the present invention is an oil-soluble gelling agent, generally used to thicken oils, improve emulsion stability, and enhance texture, and is one or more selected from dextrin fatty acid esters, amino acid-based gelling agents, and polyurethane-79.

[0022] Dextrin fatty acid esters are esters of dextrin or reduced dextrin with higher fatty acids, and the alkyl chains they contain form a crystalline structure, causing the oil to gel. It is preferable to use dextrin or reduced dextrin with an average degree of polymerization of 3 to 100. Furthermore, it is preferable to use saturated fatty acids with 8 to 22 carbon atoms as the constituent fatty acids of the dextrin fatty acid ester. Specifically, examples include dextrin palmitate, dextrin oleate, dextrin stearate, dextrin myristate, and (palmitic acid / 2-ethylhexanoic acid) dextrin.

[0023] Amino acid-based gelling agents are amino acid derivatives containing amino acid residues that gel oil by forming nano-sized fibrous networks in liquid oil. Examples of amino acid-based gelling agents include N-lauroyl-L-glutamic acid dibutylamide (dibutyllauroyl glutamide), N-2-ethylhexanoyl-L-glutamic acid dibutylamide (dibutylethylhexanoyl glutamide), polyamide-8, and polyamide-3.

[0024] Polyurethane-79 is a polyurethane copolymer having hard segment blocks formed by urethane bonding between a linear aliphatic diisocyanate, 1,6-hexamethylene diisocyanate (HDI), and a linear bulking divalent alcohol, 1,4-butane divalent alcohol, and soft segment blocks formed by hydrogenated dilinoleyl alcohol and hydrogenated polybutane divalent alcohol, with both ends blocked with stearyl alcohol. Due to the polarity of the polyurethane blocks, a physical network is formed in the oil through association via hydrogen bonding between polymer-polymer and polymer-oil. It is believed that gelation occurs when an oil is incorporated into this three-dimensional network structure. Preferably, the polyurethane-79 used in the present invention can be easily and uniformly dissolved by dissolving it in a liquid oil to form a gel-like composition.

[0025] In this invention, the polyurethane-79 can be the commercially available OILKEMIA 5S CC (manufactured by LUBRIZOL). Its composition is a polyurethane-79 gel composition containing 30% polyurethane-79 and 70% tri(caprylic / capric acid)glyceryl as a liquid oil. When incorporated into cosmetics in Japan, it is common to list the ingredients as 70% tri(caprylic / capric acid)glyceryl, 25% hydrogenated polyolefin (C6-20), and 5% (HDI / trimethylol hexyllactone) crosspolymer. In this invention, when referred to as polyurethane-79, it refers to the pure gelling agent content.

[0026] Among these, dextrin palmitate, (palmitic acid / 2-ethylhexanoic acid) dextrin, dibutyl lauroyl glutamide, dibutyl ethylhexanoyl glutamide, and polyurethane-79 are particularly preferred from the viewpoint of improving sweat resistance and ease of washing.

[0027] The amount of component (B) in the water-in-oil type sunscreen cosmetic of the present invention can be appropriately changed depending on the type of gelling agent used, but is generally 0.1 to 10% by mass, more preferably 0.5 to 5% by mass, and even more preferably 1 to 3% by mass, relative to the total amount of oil phase. Within this range, water resistance, sweat resistance, and ease of washing off are excellent.

[0028] Component (B) may be used alone or in a mixture of two or more components.

[0029] The component (C) UV protection agent used in the present invention is a UV scattering agent (C1) and / or a UV absorbing agent (C2).

[0030] The component (C1) UV scattering agent is not particularly limited, and those commonly used in cosmetics can be used, but hydrophobized metal oxides are preferably used. From the viewpoint of UV protection, it is preferable to use fine particles with an average primary particle diameter of 100 nm or less, measured using a scanning electron microscope for 10 particles in any field of view. Particularly preferred metal oxides include titanium dioxide, zinc oxide, and cerium oxide. The hydrophobization treatment method is not particularly limited, and commonly used treatment methods such as coating treatment, baking treatment, and silane coupling agent treatment can be used. The hydrophobizing agent is not particularly limited, and metal soaps, silicones, fatty acids, phospholipids, fluorine compounds, silylation agents, and acyl amino acids can be preferably used. Triethoxycaprylylsilane treatment, silicone treatment, and isostearic acid treatment of fatty acids are particularly preferred from the viewpoint of water resistance and sweat resistance of the composition. The silicone used for silicone treatment is not particularly limited, but examples include methicone, dimethicone, and hydrogen dimethicone.

[0031] The amount of component (C1) UV scattering agent in the water-in-oil type sunscreen cosmetic of the present invention is not particularly limited as long as the effects of the present invention are obtained, but it is usually used in the range of 0.01% to 40% by mass, preferably 0.5% to 25% by mass, in the total composition. Within this range, water resistance, sweat resistance, and ease of washing off are excellent.

[0032] The component (C2) UV absorber is not particularly limited, and any UV absorber commonly used in cosmetics may be used. Preferred UV absorbers include octyl methoxycinnamate (ethylhexyl methoxycinnamate), octocrylene, t-butyl methoxydibenzoylmethane, ethylhexyl triazone, diethylamino hydroxybenzoyl hexyl benzoate, oxybenzone-3, methylene bisbenzotriazolyltetramethylbutylphenol, phenylbenzimidazole sulfonic acid, homosalate, ethylhexyl salicylate, and bisethylhexyloxyphenol methoxyphenyl triazine.

[0033] The amount of component (C2) UV absorber in the water-in-oil type sunscreen cosmetic of the present invention is not particularly limited as long as the effects of the present invention are obtained, but it is usually used in the range of 0.1% to 25% by mass, preferably 1% to 20% by mass, in the total composition. Within this range, high water resistance, sweat resistance, and ease of washing off can be expected.

[0034] Components (C1) UV scattering agent and (C2) UV absorbing agent may be used individually, in combination, or mixed together in any way.

[0035] The component (D) used in the present invention is an oil-soluble film-forming agent that does not contain a silicone skeleton and is generally used to improve the durability of the coating film. Examples of component (D) include (PPG-12 / SMDI) copolymer, (VP / hexadecene) copolymer, or (VP / eicosene) copolymer.

[0036] The amount of component (D) oil-soluble film-forming agent that does not contain a silicone skeleton in the water-in-oil type sunscreen cosmetic of the present invention is not particularly limited, but 0.1% to 5% by mass is good, and more preferably 0.5% to 3% by mass. Within this range, high water resistance, sweat resistance, ease of washing off, and a secondary adhesion-free effect can be expected.

[0037] Component (D) may be used alone or in a mixture of two or more components.

[0038] In addition to the essential components mentioned above, the water-in-oil sunscreen cosmetic composition of the present invention may also contain other components commonly used in cosmetics, as needed. For example, pearlescent agents, moisturizers, oils, oil-soluble gelling agents other than component (B), oil-soluble film-forming agents other than component (D), water-soluble film-forming agents, water-soluble polymers, fragrances, bactericides, preservatives, antioxidants, pH adjusters, chelating agents, anti-inflammatory agents, antioxidants, cooling agents, herbal extracts, vitamins, and other additives can be added as appropriate. The proportion of these components can be appropriately selected according to their type and purpose, and they may be used individually or in combination of two or more as appropriate. [Examples]

[0039] The present invention will be further explained below with reference to examples. These examples are not intended to limit the present invention in any way.

[0040] <Evaluation of water resistance> Sample preparation was carried out in accordance with the SPF measurement method specified in ISO-24444. 2 mg / cm³ was added to a Helioplate HD6 (HELIOPLATE® HD6, manufactured by HerioScreen Lab., plate size: 5cm x 5cm, material: PMMA). 2 The composition was uniformly applied, and the SPF value was measured using an SPF analyzer UV-2000S (manufactured by Sanyo Trading Co., Ltd.). Next, the plate on which the sample preparation was performed was exposed to running water for 40 minutes, thoroughly dried, and the SPF value was measured again. The percentage of the SPF value after the water resistance test relative to the SPF value before the water resistance test was calculated, and this value was defined as the survival rate (%). <Evaluation Criteria> ◎: Survival rate of 75% or more ○: Survival rate of 50% or more but less than 75% △: Survival rate of 25% or more but less than 50% ×: Remaining rate less than 25%

[0041] <Evaluation of sweat resistance> The following components were placed in a 100 mL beaker and stirred to artificially prepare a model sweat solution. Composition of model sweat Sodium chloride 0.25% by mass Potassium chloride 0.02% by mass Sodium lactate 0.02% by mass Urea 0.015% by mass The concentration was adjusted to 100% by mass using deionized water.

[0042] Sample preparation was carried out in accordance with the SPF measurement method specified in ISO-24444. 2 mg / cm³ was added to a Helioplate HD6 (HELIOPLATE® HD6, manufactured by HerioScreen Lab., plate size: 5cm x 5cm, material: PMMA). 2 The composition was uniformly applied, and the SPF value was measured using an SPF analyzer UV-2000S (manufactured by Sanyo Trading Co., Ltd.). Next, the plate prepared as described above was immersed in the prepared model sweat solution for 10 minutes, and after it was thoroughly dried, the SPF value was measured again. The percentage of the SPF value after impregnation relative to the SPF value before impregnation was calculated, and this value was defined as the retention rate (%). <Evaluation Criteria> ◎: Survival rate of 75% or more ○: Survival rate of 50% or more but less than 75% △: Survival rate of 25% or more but less than 50% ×: Remaining rate less than 25%

[0043] <Method for evaluating resistance to secondary adhesion> Sample preparation was carried out in accordance with the SPF measurement method specified in ISO-24444. 2 mg / cm³ was added to a Helioplate HD6 (HELIOPLATE® HD6, manufactured by HerioScreen Lab., plate size: 5cm x 5cm, material: PMMA). 2 The composition was uniformly applied, and the SPF value was measured using an SPF analyzer UV-2000S (manufactured by Sanyo Trading Co., Ltd.). Next, the plate with the sample preparation described above was placed on tissue paper with the coated side down, and a 500g load was placed on the plate for 10 minutes to allow it to adhere to the tissue paper. After that, the SPF value was measured again. The percentage of the SPF value after adhesion compared to the SPF value before adhesion was calculated, and this value was defined as the retention rate (%). (Evaluation Criteria) ◎: Survival rate of 75% or more ○: Survival rate of 50% or more but less than 75% △: Survival rate of 25% or more but less than 50% ×: Remaining rate less than 25%

[0044] <Method for evaluating ease of rinsing> Ten expert panelists actually used the product and evaluated its ease of washing off (how easily it came off) according to the following criteria. After application, the product was washed off with the following cleaning agent 4 hours later.

[0045] [Composition of cleaning agent] Ingredients Amount (%) Glycerin 5.0 Dipropylene glycol 4.0 Potassium myristate 3.3 Potassium laurate 2.4 Alkyl (8-16) glucoside 1.5 Isostearic acid 0.4 Sodium chloride 0.15 water residue Total 100 [Evaluation Criteria] ◎: 8-10 people responded that it was easy to wash off. ○: 5 to 7 people answered that it was easy to wash off. △: 2-4 people answered that it was easy to rinse off. ×: 0-1 people answered that it was easy to rinse off.

[0046] [Table 1] *1 Hydrophobized zinc oxide: Triethoxycaprylylsilane-treated zinc oxide (average primary particle size of base zinc oxide: 35 nm) *2 Hydrophobized titanium dioxide: Triethoxycaprylylsilane-treated titanium dioxide (average primary particle size of the base titanium dioxide: 10 nm)

[0047] [Table 2]

[0048] [Table 3]

[0049] According to Examples 1-19, the water-in-oil emulsion cosmetic composition of the present invention yielded good results in terms of water resistance, sweat resistance, secondary adhesion reduction effect, and ease of washing. Comparative Examples 1-4 were examples in which component A was replaced with a similar compound. In Comparative Example 1, where component A was replaced with polyhydroxystearic acid, the secondary adhesion reduction effect and ease of washing deteriorated significantly. In Comparative Examples 2-4, where component A was replaced with a different silicone-based dispersant, water resistance, and especially sweat resistance, tended to deteriorate, and the objectives of the present invention could not be achieved. Comparative Example 5 was an example in which component B was omitted, but the water resistance, sweat resistance, and ease of washing were impaired. Comparative Examples 6 and 7 were examples in which component B was replaced with a similar component, but sufficient effect was not obtained, especially regarding ease of washing, and the objectives of the present invention could not be achieved. In Comparative Example 8, component D was omitted, but the secondary adhesion reduction effect, especially water resistance and sweat resistance, deteriorated significantly. Comparative Examples 9 and 10 show examples where component D was replaced with a similar compound, but it was found that the ease of washing off deteriorated significantly. From these results, it can be concluded that the water-in-oil type sunscreen cosmetic composition with the present invention's composition can achieve all of the present invention's objectives and provide a new water-in-oil type sunscreen cosmetic composition that has functions that could not be achieved with conventional ingredient compositions.

[0050] Using conventional methods, water-in-oil sunscreen cosmetics of the following formulations were prepared. It was confirmed that all formulations exhibited the effects of the present invention.

[0051] Water-in-oil sunscreen milk (component) (mass%) 1. Cyclopentasiloxane 24.0 2. Dimethicone 2.0 3. Isododecane 2.0 4. Isotridecyl isononanoate 5.0 5. Ethylhexyl Methoxycinnamate 9.0 6. Bis-ethylhexyloxyphenol methoxyphenyl triazine 2.0 7. Diethylaminohydroxybenzoyl hexyl benzoate 2.0 8. Triethylhexanoin 3.0 9. Neopentyl glycol diethylhexanoate 6.0 10. (VP / Hexadecene) Copolymer 2.0 11. Dextrin palmitate 1.5 12. Hydrogen dimethicone-treated zinc oxide *3 3.5 13. Cetyl diglyceryl tris(trimethylsiloxy) Silylethyl dimethicone 1.0 14. Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone 2.0 15. PEG-10 Dimethicone 0.5 16. (Vinyl dimethicone / methicone silsesquioxane) crosspolymer 2.0 17. Stearyl glycyrrhetinate 0.1 18. Tocopherol 0.05 19. Sodium chloride 0.5 20.1,3-Butylene glycol 8.0 21. Glycerin 3.0 22. Comfrey leaf extract 0.1 23. Tabebuia impetiginosa bark extract 0.1 24. Nicotinamide 1.0 25.Purified water remainder *3 Average primary particle size of zinc oxide substrate: 35 nm

[0052] Water-in-oil sunscreen cream (component) (mass%) 1. Dimethicone 8.0 2. Caprylyl Methicone 3.0 3. Cyclopentasiloxane 6.0 4. Triethoxycaprylylsilane-treated zinc oxide *4 12.0 5. Hydrogen dimethicone-treated titanium dioxide *5 5.0 6. Lauryl PEG-10 Tris(trimethylsiloxy) Silylethyl dimethicone 3.0 7. Ethylhexyl Methoxycinnamate 8.0 8. Diethylamino hydroxybenzoyl hexyl benzoate 4.0 9. Bis-ethylhexyloxyphenol methoxyphenyl triazine 2.0 10. Neopentyl glycol diethylhexanoate 3.0 11. PEG / PPG / Polybutylene Glycol-8 / 5 / 3 Glycerin 1.0 12. Silica 1.0 13. Polyurethane-79 1.2 14. Caprylic / Capric Triglyceride 2.8 15. (PPG-12 / SMDI) Copolymer 1.0 16. PEG-10 Dimethicone 3.0 17. Disteardimonium hectorite 1.0 18. Stearyl glycyrrhetinate 0.05 19. Tocopherol 0.1 20. Glycerin 5.0 21.1,3-Butylene glycol 5.0 22. Sodium chloride 0.5 23. Phenoxyethanol 0.2 24. Job's Tears Seed Extract 0.1 25. Polyquaternium-51 0.1 26.Purified water remainder *4 Average primary particle size of zinc oxide substrate: 35 nm *5 Average primary particle size of titanium dioxide substrate: 15 nm

[0053] Water-in-oil sunscreen lotion (component) (mass%) 1. Cyclopentasiloxane 15.0 2. Diphenylsiloxyphenyl trimethicone 5.0 3. Isododecane 10.0 4. Isostearate-treated zinc oxide *6 7.0 5. Isostearate-treated titanium dioxide *7 2.0 6. Cetyl diglyceryl tris(trimethylsiloxy) Silylethyl dimethicone 2.0 7. Isoamyl laurate 5.0 8. Ethylhexyl Methoxycinnamate 15.0 9. Bis-ethylhexyloxyphenol methoxyphenyl triazine 3.0 10. Diethylaminohydroxybenzoyl hexyl benzoate 2.0 11. Triethylhexanoin 3.0 12. (Vinyl dimethicone / methicone silsesquioxane) crosspolymer 5.0 13. Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone 2.0 14. PEG-10 Dimethicone 1.0 15. Dibutyl Lauroyl Glutamide 1.5 16. (VP / Eicosene) Copolymer 1.0 17. Tocopherol 0.05 18. Stearyl glycyrrhetinate 0.05 19. Trisodium Ascorbyl Palmitate Phosphate 0.01 20. Arbutin 0.01 21. Placenta extract 0.01 22. Phenoxyethanol 0.2 23. Potassium hydroxide 0.005 24. Sodium chloride 0.5 25.1,3-Butylene glycol 8.0 26. Diglycerin 2.0 27. Ethanol 4.0 28. Dipropylene glycol 2.0 29.Purified water remainder *6 Average primary particle size of zinc oxide substrate: 35 nm *7 Average primary particle size of titanium oxide substrate: 10 nm

[0054] Water-in-oil sunscreen milk (Ingredient) (mass%) 1. Cyclopentasiloxane 4.0 2. Dimethicone 5.0 3. Isododecane 10.0 4. Hydrogen Dimethicone Treated Zinc Oxide *8 20.0 5. Hydrogen Dimethicone Treated Titanium Oxide *9 5.0 6. Cetyl Diglyceryl Tris(Trimethylsiloxy)Silylethyldimethicone 3.0 Silylethyldimethicone 3.0 7. Polyhydroxystearic Acid 0.5 8. Dextrin Palmitate 2.0 9. (VP / Eicosene) Copolymer 1.0 10. Polyglyceryl-2 Isostearate 0.5 11. Isotridecyl Isononanoate 8.0 12. PEG-9 Polydimethylsiloxyethyl Dimethicone 3.0 13. PEG-10 Dimethicone 0.3 14. Polymethylsilsesquioxane 3.0 15. Tocopherol 0.1 16. Sucrose Tetrastearate Triacetate 0.1 17. Potassium Hydroxide 0.5 18. Sodium Chloride 0.5 19. Glycerin 5.0 20. 1,3-Butylene Glycol 8.0 21. Phenoxyethanol 0.3 22. Propynyl Butylcarbamate Iodide 0.01 23. EDTA-2Na 0.05 24. Purified Water Balance *8 Average Primary Particle Size of Substrate Zinc Oxide: 35nm *9 Average Primary Particle Size of Substrate Titanium Oxide: 15nm

[0055] Water-in-Oil Type Sunscreen Lotion (Ingredient) (mass%) 1. Dimethicone 8.0 2. Isoamyl laurate 5.0 3. Triethoxycaprylylsilane-treated titanium dioxide *10 8.0 4. Ethylhexyl Methoxycinnamate 9.0 5. Diethylamino hydroxybenzoyl hexyl benzoate 3.0 6. Bis-ethylhexyloxyphenol methoxyphenyl triazine 3.0 7. Octocrylene 1.0 8. Cetyl diglyceryl tris(trimethylsiloxy) Silylethyl dimethicone 4.0 9. (Palmitic acid / 2-ethylhexanoic acid) dextrin 2.0 10. (VP / Hexadecene) Copolymer 2.0 11. Trifluoroalkyldimethyltrimethylsiloxysilicate 0.2 12. (Hydrolyzed silk / PG-propylmethylsilanediol) Crosspolymer 2.0 13. Hydrogenated polyisobutene 3.0 14. (HDI / Trimethylol Hexyllactone) Crosspolymer 3.0 15. Tocopherol 0.1 16. Glycerin 5.0 17.1,3-Butylene glycol 5.0 18. Sodium chloride 0.5 19. Phenoxyethanol 0.2 20. EDTA-2Na 0.05 21. Tabebuia impetiginosa bark extract 0.1 22.Purified water remainder *10 Average primary particle size of titanium oxide substrate: 10 nm

[0056] Water-in-oil sunscreen cream (component) (mass%) 1. Cyclopentasiloxane 9.0 2. Dimethicone 3.0 3. Diphenylsiloxyphenyl trimethicone 3.0 4. Diisopropyl sebacate 5.0 5. Isotridecyl isononanoate 4.0 6. Isododecane 8.0 7. Ethylhexyl Methoxycinnamate 10.0 8. Bis-ethylhexyloxyphenol methoxyphenyl triazine 2.5 9. Diethylamino hydroxybenzoyl hexyl benzoate 2.5 10. Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone 3.0 11. PEG / PPG-19 / 19 Dimethicone 0.2 12. Sucrose tetrastearate triacetate 3.0 13. PEG-30 Dipolyhydroxystearate 0.25 14. Dibutylethylhexanoylglutamide 1.0 15. Lauryl PEG-10 Tris(trimethylsiloxy) Silylethyl dimethicone 3.0 16. (VP / Eicosene) Copolymer 0.1 17. Trimethylsiloxysilicate 0.5 18. (Vinyl dimethicone / methicone silsesquioxane) crosspolymer 2.0 19. Stearyl glycyrrhetinate 0.05 20. Glycerin 1.0 21.1,3-Butylene glycol 5.0 22. Sodium chloride 0.3 23. Phenoxyethanol 0.3 24. Ethanol 3.0 25.Purified water remainder

[0057] Water-in-oil liquid foundation (component) (mass%) 1. Hydrogen dimethicone-treated zinc oxide *11 5.0 2. Hydrogen dimethicone-treated titanium dioxide *12 9.0 3. Hydrogen dimethicone-treated titanium dioxide *13 11.0 4. Cyclopentasiloxane 15.0 5. Diphenylsiloxyphenyl trimethicone 5.0 6. Dimethicone 3.0 7. Caprylyl Methicone 10.0 8. PEG-9 Polydimethylsiloxyethyl Dimethicone 2.5 9. Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone 0.5 10. Polyglyceryl-2 isostearate 1.0 11. Disteardimonium hectorite 1.0 12. PEG-10 Dimethicone 3.0 13. Cetyl diglyceryl tris(trimethylsiloxy) Silylethyl dimethicone 2.0 14. Dextrin myristate 1.0 15. (PPG-12 / SMDI) Copolymer 1.0 16. (Acrylates / Ethylhexyl Acrylate) Crosspolymer 0.98 17. Silylated silica 0.02 18. Mica 0.58 19. Titanium dioxide 0.42 20. Talc 1.0 21. Silica 1.0 22. Iron oxide 2.0 23. Yellow iron oxide 0.5 24. Black iron oxide 0.2 25. Sodium chloride 0.5 26.1,3-Butylene glycol 9.0 27. Glycerin 2.0 28. Allantoin 0.1 29. Phenoxyethanol 0.1 30. Propynyl iodide butylcarbamate 0.01 31.Purified water remainder *11 Average primary particle size of zinc oxide substrate: 35 nm *12 Average primary particle size of titanium dioxide substrate: 250 nm *13 Average primary particle size of titanium dioxide substrate: 15 nm

[0058] Oil-in-water makeup base (component) (mass%) 1. Cyclopentasiloxane 15.0 2. Diphenylsiloxyphenyl trimethicone 5.0 3. Isododecane 10.0 4. Isostearate-treated zinc oxide *14 0.5 5. Isostearate-treated titanium dioxide *15 0.5 6. Cetyl diglyceryl tris(trimethylsiloxy) Silylethyl dimethicone 5.0 7. Ethylhexyl Methoxycinnamate 1.0 8. Triethylhexanoin 3.0 9. PEG / PPG / Polybutylene Glycol-8 / 5 / 3 Glycerin 2.0 10. (Vinyl dimethicone / methicone silsesquioxane) crosspolymer 5.0 11. Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone 2.0 12. PEG-10 Dimethicone 1.0 13. Dibutyl Lauroyl Glutamide 1.5 14. (VP / Eicosene) Copolymer 1.0 15. Tocopherol 0.05 16. Stearyl glycyrrhetinate 0.05 17. Phenoxyethanol 0.2 18. Potassium hydroxide 0.005 19. Sodium chloride 0.5 20.1,3-Butylene glycol 6.0 21. Glycerin 4.0 22. Dipropylene glycol 2.0 23.Purified water remainder *14 Average primary particle size of zinc oxide substrate: 35 nm *15 Average primary particle size of titanium oxide substrate: 10 nm

Claims

1. The following components (A) to (D) (A) Alkyl polyether-modified silicone having a siloxane dendron structure (B) One or more selected from dextrin fatty acid ester, amino acid-based gelling agent, and polyurethane-79. (C) UV protection agent (D) Oil-soluble film-forming agent that does not contain a silicone skeleton An oil-based water-in-oil sunscreen cosmetic containing [the specified ingredient].

2. The water-in-oil sunscreen cosmetic according to claim 1, characterized in that component (A) is an alkyl polyglycerin-modified silicone having a siloxandendron structure.

3. The water-in-oil sunscreen cosmetic according to claim 1, characterized in that ingredient (C) UV protection agent is a UV scattering agent (C1) and / or a UV absorbing agent (C2).

4. The water-in-oil sunscreen cosmetic according to claim 1, wherein component (B) is one or more selected from the group consisting of dextrin palmitate, (palmitic acid / 2-ethylhexanoic acid) dextrin, dibutyl lauroyl glutamide, dibutyl ethylhexanoyl glutamide, and polyurethane-79.

5. The water-in-oil sunscreen cosmetic composition according to claim 1, wherein component (D) is one or more selected from the group consisting of (VP / eicosene) copolymer, (VP / hexadecene) copolymer, and (PPG-12 / SMDI) copolymer.

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