JP2019070024A - Skin care cosmetic - Google Patents

Abstract

To provide a skin care cosmetic, that is, an antipollution cosmetic, capable of effectively protecting the skin from various external stimuli including not only air pollutants or an acidic liquid but also ultraviolet rays.SOLUTION: There is provided a skin care cosmetic which contains (A) 0.001 to 10 mass% of magnesium metasilicate aluminate and (B) 1 to 40 mass% of an ultraviolet light-protecting agent. The skin care cosmetic preferably contains at least one selected from (C) a porous powder, (D) citric acid (a salt thereof) and (E) an antioxidant.SELECTED DRAWING: None

Description

  The present invention relates to a skin care cosmetic that can prevent or suppress damage to the skin due to external stimuli such as air pollutants and ultraviolet light. More particularly, the present invention relates to a skin care cosmetic that not only has UV protection ability but also can effectively adsorb air pollutants and has excellent pH buffering ability.

Skin and hair are constantly exposed to external stimuli and suffer various damages from the external environment. In particular, air pollutants such as microparticulate substances and acid liquids such as acid rain, which are recently attracting attention, are known to adversely affect the skin by adhering to the skin. In addition, it has been clarified that ultraviolet rays such as UVA and UVB also damage the skin and cause skin aging.
In order to protect the skin from these external stimuli, it is considered that the substance that may cause damage is not attached to the skin and / or the adverse effect of the attached stimulus causing substances is mitigated (antioxidized or neutralized), etc. Be

  Conventionally, as a so-called "anti-pollution cosmetic" having a function of protecting the skin as described above, cosmetics that include an oil-based coating agent to densely cover the skin have been proposed. However, although it is effective in terms of not causing the stimulant to adhere to the skin, it is not clear whether it is effective for covering the skin with a tight membrane and is effective for all stimulants. there were.

Patent Document 1 describes a composition (cosmetic agent) for protecting the skin or hair from heavy metals contained in air pollutants, and that a chelating agent that chelates heavy metals and a sphingolipid are mixed. It is characterized.
Patent Document 2 describes a skin / hair protecting agent containing an extract of a plant belonging to the genus Silan and is intended to alleviate the adverse effects of irritants based on the antioxidant action of the extract. .

  As such, cosmetics intended to protect the skin by trapping irritating substances such as air pollutants or suppressing oxidation have been proposed, but their effects are limited. Cosmetics which also have the function of suppressing stimulation by ultraviolet light have not been known conventionally.

Unexamined-Japanese-Patent No. 2004-244423 JP 2004-262894 A

  Accordingly, it is an object of the present invention to provide a skin care cosmetic that can effectively protect the skin from various external stimuli including air pollutants and acidic liquids as well as ultraviolet light, that is, an anti-pollution cosmetic.

  In order to solve the above-mentioned problems, as a result of extensive investigations by the present inventors, not only magnesium aluminometasilicate is excellent in the adsorptivity of air pollutants but also has a pH buffering ability to neutralize acid substances. Furthermore, they have found that they can be formulated in combination with various ultraviolet light protective agents in a stable manner, and have completed the present invention.

  That is, the present invention provides a skin care cosmetic comprising (A) magnesium aluminum metasilicate and (B) an ultraviolet protective agent.

  Since the skin care cosmetic composition of the present invention contains magnesium aluminometasilicate, it does not effectively adsorb air pollutants to reach the skin due to its adsorption ability, and pH buffer ability even if acid substances adhere. It can be neutralized and skin damage due to these external stimuli can be reduced. Moreover, since the ultraviolet protection agent is mix | blended in combination with the magnesium aluminometasilicate, the damage by an ultraviolet-ray can also be suppressed simultaneously.

Below, the skin care cosmetics of this invention are demonstrated in detail.
The skin care cosmetic composition of the present invention contains (A) magnesium aluminometasilicate.
The magnesium aluminometasilicate used in the present invention is preferably an amorphous substance having no crystal form, and is generally used in granular or powder form. Although it can not be exactly represented by a chemical structural formula because it has an amorphous structure, it can be conveniently represented by the following general formula (1).
Al ₂ O ₃ · MgO · 1.7 SiO ₂ · x H ₂ O (1)

Granules or powders of magnesium aluminometasilicate have a very large specific surface area (at least 100 m ² / g, generally 250 to 300 m ² / g), so they are excellent in water absorption and oil absorption while neutralizing acidic substances. It has the feature of having the ability.
In the present invention, commercially available magnesium aluminometasilicate can also be used, and for example, Neusilin (registered trademark) manufactured by Fuji Chemical Industry Co., Ltd. can be mentioned.

  The magnesium aluminometasilicate used in the present invention may be in the form of granules or powder, and the shape and particle size thereof are not particularly limited, but usually 20, 30, 40 or 50 μm or more, 2,000, 1, 1, Spherical powders or granules having a particle size of less than or equal to 000 000 or 800 μm are preferred.

  Although the compounding quantity of the magnesium aluminometasilicate in the skin care cosmetics of this invention is not specifically limited, Usually, 0.001, 0.005, 0.008 or 0.01 mass% or more is preferable, Preferably 10 mass% The content is preferably 5% by mass or less, more preferably 3% by mass or less. For example, it may be blended in the range of 0.001 to 10% by mass, 0.05 to 5% by mass, or 0.01 to 3% by mass or the like. If the compounding amount is less than 0.001% by mass, it is difficult to obtain the effect of the compounding of magnesium aluminum silicate, and if it exceeds 10% by mass, a good feeling in use may be impaired.

  The skin care cosmetic composition of the present invention contains (B) an ultraviolet protective agent in addition to the (A) magnesium aluminometametasilicate. The ultraviolet protection agent in the present invention is composed of an ultraviolet absorber and / or an ultraviolet scattering agent.

The ultraviolet absorber which can constitute the ultraviolet protective agent is not particularly limited, and can be selected from those generally used in cosmetics and the like.
Specific examples of the ultraviolet absorber include, for example, para-aminobenzoic acid (PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester, N, N-dimethyl PABA ethyl ester, Benzoic acid ultraviolet absorbers such as N, N-dimethyl PABA butyl ester, diethylaminohydroxybenzoyl hexyl benzoate; anthranilic acid ultraviolet absorbers such as homomentyl-N-acetyl anthranilate; amyl salicylate, menthyl salicylate, homomentyl salicylate Salicylic acid based UV absorbers such as octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, etc .; octyl cinnamate, ethyl-4-isop Pilsinnamate, methyl-2,5-diisopropylcinnamate, ethyl-2,4-diisopropylcinnamate, methyl-2,4-diisopropylcinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, Isoamyl-p-methoxycinnamate, octyl-p-methoxycinnamate [= 2-ethylhexyl-p-methoxycinnamate], 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α -Cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl-diparamethoxycinnamate, 3,4,5-trimethoxycinnamic acid 3 -Methyl-4- [methylbi] A cinnamic acid-based ultraviolet absorber such as (trimethylsiloxy) silyl] butyl; 2-phenyl-5-methylbenzoxazole, 2,2'-hydroxy-5-methylphenylbenzotriazole, 2- (2'-hydroxy -5'-t-octylphenyl) benzotriazole, 2- (2'-hydroxy-5'-methylphenylbenzotriazole, dibenzalazine, dianisoylmethane, 4-tert-butyl-4'-methoxydibenzoylmethane, 4- (1,1-Dimethylethyl) -4′-methoxydibenzoylmethane, 5- (3,3-dimethyl-2-norbornylidene) -3-pentan-2-one, octocrylene [= 2-cyano-3,3- Diphenyl-2-propenoic acid-2-ethylhexyl ester], polysilicon-15 [= dimethic acid diethyl benzal Malonate], di- (2-ethylhexyl) -4'-methoxybenzalmalonate and the like.

The ultraviolet light scattering agent that can constitute the ultraviolet light protective agent is not particularly limited, and can be selected from those generally used in cosmetics and the like.
For example, metal oxide powders such as titanium oxide and zinc oxide are preferably used.
By combining and combining an ultraviolet absorber and an ultraviolet scattering agent, the ultraviolet ray protection effect can be improved over a wide wavelength range.

  The compounding amount of the ultraviolet protective agent (the total compounding amount of the ultraviolet absorber and the ultraviolet scattering agent) in the skin care cosmetic of the present invention is usually 40% by mass or less, preferably 35% by mass or less, more preferably 30% by mass or less is there. The lower limit of the compounding amount of the ultraviolet protective agent is not particularly limited, but is usually 1, 1.5 or 2% by mass or more. For example, it can mix | blend in 1-40 mass%, 1.5-35 mass%, or 2-30 mass% grade | etc.,. If the blending amount is less than 1% by mass, a sufficient ultraviolet protection ability may not be obtained, and if it exceeds 40% by mass, a good feeling in use may be impaired.

  The skin care cosmetic composition according to the present invention can effectively adsorb air pollutants and the like by containing (A) magnesium aluminometasilicate, and neutralizes the attached acidic liquid based on its pH buffer capacity. be able to. Since the skin care cosmetic composition of the present invention further contains (B) an ultraviolet light protective agent, it is also possible to effectively protect the skin from ultraviolet light. Cosmetics having such a function have not been known conventionally.

In the skin care cosmetic composition of the present invention, it is preferable to add the following components in addition to the aforementioned essential components (A) and (B).
(C) Porous powder By blending the porous powder having adsorptivity with the skin care cosmetic composition of the present invention, (A) the contaminant adsorptive function of the cosmetic composition of the present invention based on magnesium aluminometasilicate is further enhanced Can.
The porous powder that can be blended in the present invention is not particularly limited as long as it can be blended in cosmetics and the like, and specific examples thereof include clay minerals such as silica, cellulose, zeolite and bentonite.

The shape and average particle diameter of the porous powder are not particularly limited, but it is preferable to blend spherical powder of about 1 to 100 μm from the viewpoint of usability and the like.
When the porous powder is blended, the blending amount is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and preferably 10% by mass or less More preferably, it is 5% by mass or less, more preferably 3% by mass or less. For example, it can be blended in a range of 0.01 to 10% by mass, 0.05 to 5% by mass, or 0.1 to 3% by mass.

(D) Citric acid (salt)
The pH buffering ability of the present invention based on (A) Magnesium aluminometasilicate can be further enhanced by blending the skin care cosmetic of the present invention with citric acid (salt) having a buffering ability.

Citric acid / citrate functions to form a pH buffer system to adjust the pH of the cosmetic. As a citrate, sodium salt, potassium salt etc. can be mentioned as a representative example.
When citric acid (salt) is blended, the blending amount is preferably 0.01% by mass or more, more preferably 0.015% by mass or more, further preferably 0.2% by mass or more, and preferably 5% by mass. % Or less, more preferably 3% by mass or less, and further preferably 1% by mass or less. For example, it can be blended in the range of 0.01 to 5% by mass, 0.01 to 3% by mass, or 0.01 to 1% by mass.

(E) Antioxidant The skin care cosmetic composition of the present invention can prevent skin damage caused by air pollutants and acidic liquid based on the adsorption ability and pH buffer ability of (A) magnesium aluminometasilicate, but it is further an antioxidant The effect of preventing the damage due to the oxidation substance is improved by blending.
Examples of antioxidants used in the present invention include sulfur-containing compounds such as thiotaurine, hypotaurine, glutathione, cysteine and cystine, α-tocopherol and its derivatives, black tea extract, green tea extract, thyme extract, blackberry extract and the like plants An extract can be mentioned.

  The sulfur-containing compound such as thiotaurine and α-tocopherol may be blended in the form of a salt, and is not particularly limited. However, alkali metal salts such as sodium salt, potassium salt, lithium salt, magnesium salt, calcium salt, etc. Alkaline earth metal salts, ammonium salts, amino acid salts and the like can be exemplified.

  When the antioxidant is blended, the blending amount is preferably 0.001% by mass or more, more preferably 0.0015% by mass or more, still more preferably 0.02% by mass or more, and preferably 1% by mass or less More preferably, it is 0.5 mass% or less, more preferably 0.1 mass% or less. For example, it can mix | blend in 0.001-1 mass%, 0.001-0.5 mass%, or 0.001-0.1 mass% in the range.

  The skin care cosmetic composition of the present invention can be provided in any form such as an aqueous cosmetic (including a microemulsion), an oil-in-water emulsified cosmetic, a water-in-oil emulsified cosmetic, and an oily cosmetic. And, other optional components that can be usually blended in the cosmetic provided in these forms may be contained within the range that does not impair the effects of the present invention.

  Examples of optional components that can be blended include, but are not limited to, oil components, surfactants, moisturizers, thickeners, alcohols, powder components, organically modified clay minerals, aqueous components, various drugs and the like.

  As an oil-based component, for example, camellia oil, macadamia nut oil, olive oil, castor oil, safflower oil, soybean oil, tea seed oil, cocoa butter, coconut oil, hardened coconut oil, palm oil, mokurou, hardened castor oil, beeswax, Natural oils and fats such as candelilla wax, carnauba wax, lanolin, liquid lanolin, jojoba wax, hard lanolin, polyoxyethylene lanolin alcohol ether, polyoxyethylene cholesterol ether, liquid paraffin, ozokerite, squalene, paraffin, ceresin, vaseline, microcrystallinerin wax, etc. Hydrocarbon-based oils and fats, isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexylate, dipenta Synthetic oil component such as lysitol fatty acid ester, pentaerythritol tetra-2-ethylhexyl acid, glycerin tri-2-ethylhexyl acid, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, castor oil fatty acid methyl ester, dimethylpoly Forming linear polysiloxane such as siloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, etc., cyclic polysiloxane such as decamethylpolysiloxane, dodecamethylpolysiloxane, tetramethyltetrahydrogenpolysiloxane, etc., forming a three-dimensional network structure And silicones such as silicone rubber.

  Examples of lipophilic nonionic surfactants include sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, penta-2-ethylhexyl acid Fatty acid esters of sorbitan such as diglycerol sorbitan, glycerin monostearate, glycerin oleate pyroglutamate, fatty acid esters of glycerin or polyglycerin such as malate of glycerin monostearate, propylene glycol such as propylene glycol monostearate Fatty acid esters, hydrogenated castor oil derivatives, glycerol alkyl ethers and the like.

  Examples of hydrophilic nonionic surfactants include polyoxyethylene sorbitan monooleate, fatty acid esters of polyoxyethylene sorbitan such as polyoxyethylene sorbitan monostearate, polyoxyethylene sorbite monolaurate, polyoxyethylene Fatty acid esters of polyoxyethylene sorbite such as sorbite monooleate, polyoxyethylene sorbite monostearate, etc., polyoxyethylene glycerin monostearate, polyoxyethylene glycerin monoisostearate, polyoxyethylene glycerin triisostearate, etc. Fatty acid ester of polyoxyethylene glycerin, polyoxyethylene monooleate, fatty acid ester of polyoxyethylene such as polyoxyethylene distearate Polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene stearyl ether, polyoxyethylene (2-octyldodecyl) ether, polyoxyethylene alkyl ethers such as polyoxyethylene cholestanol ether, etc., polyoxyethylene octyl Alkyl phenyl ethers of polyoxyethylene such as phenyl ether, polyoxyethylene nonyl phenyl ether, polyoxyethylene dinonyl phenyl ether, pluronic type surfactants such as pluronic, (polyoxyethylene polyoxypropylene) cetyl ether, (poly Oxyethylene polyoxypropylene) 2-decyl tetradecyl ether, (polyoxyethylene polyoxypropylene) butyl ether, hydrogenated Norin, polyoxyethylene polyoxypropylene and alkyl ether of polyoxyethylene polyoxypropylene such as ether of glycerin, polyoxyethylene such as tetronic, condensate of polyoxypropylene and ethylenediamine, polyoxyethylene castor oil, poly Oxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil monoisostearate, polyoxyethylene hydrogenated castor oil triisostearate, polyoxyethylene hydrogenated castor oil monopyroglutamate monoisostearate, polyoxyethylene hydrogenated castor oil maleate etc Derivatives of polyoxyethylene castor oil or polyoxyethylene hydrogenated castor oil, coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide, etc. Alkanolamides, fatty acid esters of polyoxyethylene propylene glycol, alkylamines of polyoxyethylene, fatty acid amide of polyoxyethylene, fatty acid ester of sucrose, condensate of polyoxyethylene nonylphenol and formaldehyde, alkyl ethoxydimethylamine oxide, Trioleyl phosphate and the like can be mentioned.

  Examples of anionic surfactants include fatty acid soaps such as sodium laurate and sodium palmitate, salts of higher alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate, salts of polyoxyethylene lauryl sulfate and triethanolamine, Salts of alkyl ether sulfates such as sodium polyoxyethylene lauryl sulfate, N-acyl sarcosine acids such as sodium lauroyl sarcosine, sodium N-myristoyl-N-methyl taurine, coconut oil fatty acid methyl taurid sodium, lauryl methyl taurid sodium etc. Of higher fatty acid amides, phosphoric acid ester salts of polyoxyethylene oleyl ether sodium phosphate, sodium polyoxyethylene stearyl ether sodium phosphate, etc., di-2-ethy Sodium hexyl sulfosuccinate, monolauroyl monoethanolamide polyoxyethylene sodium sulfosuccinate, sodium lauryl polypropylene glycol sulfosuccinate, sulfosuccinate, sodium dodecylbenzene sulfonate, alkyl benzene sulfonate such as dodecylbenzene sulfonate triethanolamine, N -N-acyl glutamic acid such as monosodium lauroyl glutamic acid and disodium N-stearoyl glutamic acid, salts of sulfuric acid esters of higher fatty acid esters such as hardened coconut oil fatty acid glycerin sodium sulfate, carboxylate of polyoxyethylene alkyl ether, α-olefin Sulfonate, sulfonate of higher fatty acid ester, salt of secondary alcohol sulfate, higher fatty acid alkylol Examples thereof include salts of sulfates of amides, sodium lauroyl monoethanolamide succinate, N-palmitoyl aspartic acid ditriethanolamine, coconut oil fatty acid collagen hydrolysis alkali salts and the like.

  Examples of the cationic surfactant include alkyltrimethyl ammonium salts such as stearyl trimethyl ammonium chloride and lauryl trimethyl ammonium chloride, dialkyl dimethyl ammonium salts such as distearyl dimethyl chloride and the like, poly (N, N'-dimethyl-3, chloride 5-methylene piperidinium), alkyl pyridinium salts such as cetyl pyridinium chloride, alkyl quaternary ammonium salts, alkyl dimethyl benzyl ammonium salts, alkyl isoquinolinium salts, dialkyl morpholinium salts, polyoxyethylene alkyl amines, alkyl amines Salts, fatty acid derivatives of polyamines, fatty acid derivatives of amyl alcohol, benzalkonium chloride, benzethonium chloride, cationic polymer, .beta.-N, N-dimethyl-N-dimethyl acrylate, acrylic acid Ruan ammonio ethyl chloride-vinyl pyrrolidone copolymer, and the like.

  Examples of amphoteric surfactants include sodium 2-undecyl-N, N, N-tris (hydroxyethylcarboxymethyl) -2-imidazoline, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxydi Imidazoline amphoteric surfactants such as sodium, 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryl dimethylaminoacetic acid betaines, alkylbetaines, amidobetaines, betaine amphoteric surfactants such as sulfobetaines Etc.

  As a moisturizer, for example, polyhydric alcohols such as ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin, erythritol, trimethylolpropane, pentaerythritol, sorbitol, maltitol, diglycerin, polyethylene glycol and the like Cholesteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, urea, diglycerin ethylene oxide / propylene oxide adduct and the like.

  As the thickener, for example, gum arabic, carrageenan, tragacanth gum, quince seed (mallo), casein, sodium casein, dextrin, gelatin, sodium alginate, methylcellulose, ethylcellulose, carboxymethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, polyvinyl alcohol, Sodium polyacrylate, carboxyvinyl polymer, guar gum, xanthan gum and the like can be mentioned.

  Examples of higher alcohols include lauryl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, monostearylglycerin ether (batyl alcohol), lanolin alcohol, cholesterol, phytosterol, isostearyl alcohol, octyldodecanol and the like. It can be mentioned.

  As a powder component, for example, talc, kaolin, mica, sericite (sericite), phlogopite, synthetic mica, magnesium carbonate, calcium carbonate, aluminum carbonate, aluminum silicate, silica, zeolite, barium sulfate, calcined calcium sulfate (gypsum gypsum) Calcium phosphate, fluoroapatite, hydroxyapatite, ceramic powder, metal soap (zinc myristate, calcium palmitate, aluminum stearate etc.), inorganic powder such as boron nitride, polyamide resin powder (nylon powder), polyethylene powder, polymethacrylic acid Organic powders such as methyl powder, polystyrene powder, styrene-acrylic acid copolymer powder, polymethylsilsesquioxane powder, cellulose powder and the like can be mentioned. Moreover, as a synthetic resin emulsion, an acrylic resin emulsion, a polyvinyl acetate resin emulsion etc. are mentioned, for example.

  As the organically modified clay mineral, one obtained by adding a quaternary ammonium salt compound to a natural or synthetic smectite clay mineral such as bentonite by ion exchange reaction is preferable. The organically modified clay mineral is not particularly limited as long as it is pharmaceutically acceptable, and examples thereof include dimethyl ammonium hectorite, benzyl dimethyl stearyl ammonium hectorite, distearyl dimethyl ammonium chloride-treated aluminum magnesium silicate and the like. As commercially available products, dimethyl distearyl ammonium hectorite sold under the name "Bentone 38 VCG" from Elementis, and benzyl dimethyl stearyl ammonium hectorite sold under the name "Benton 27 VCG" from Elementis, etc. Preferably illustrated. In particular, in the case of a water-in-oil emulsified cosmetic, the uniformity of the emulsion can be improved by blending an organically modified clay mineral.

  In addition to the above, sedeating agents such as disodium edetate, trisodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, caffeine, tannin, verapamil, tranexamic acid and its derivatives, various compounds Also contains other medicines such as herbal medicine, tocopherol acetate, glycyrrhizinic acid and its derivatives or their salts, ascorbic acid, magnesium phosphate, kojic acid and other skin-whitening agents, glucose, fructose, mannose, sucrose, saccharides such as trehalose etc. can do.

  The skin care cosmetic composition of the present invention is preferably provided in the form of a cream, an ointment, a gel, a lotion, an emulsion and the like, but is not particularly limited.

  The invention will be further described in the following by way of examples. In addition, a compounding quantity means the mass%, unless it mentions specially.

Example 1: Air pollutant adsorption effect Samples were prepared according to the formulation shown in Table 1 below.

The simulated air pollutants (dispersions) having the following composition were mixed in the respective samples at 5% by mass and allowed to stand for 15 minutes.
Pseudo air pollutants: carbon black (1% by mass) + cetyl octanoate (99% by mass)

The results of observing the appearance of the sample immediately after the addition of the pseudo air pollutants and after leaving for 15 minutes were evaluated based on the following criteria. At the same time, the ultraviolet protection effect of each sample was measured and evaluated according to the following criteria. The results are shown together in Table 2.
Evaluation criteria Adsorption effect:
After standing for 15 minutes, carbon black settled and a clear layer was observed: A
No sedimentation and clear layer of carbon black found: B
UV protection effect:
Absorbance at a wavelength of 300 nm is 1 or more: A
Absorbance at a wavelength of 300 nm is less than 1: B

  As apparent from the results shown in Table 2, each sample containing the same amount of UV protective agent (UV absorber) has sufficient UV protective ability. However, in Comparative Example 2 in which (vinyl dimethicone / methicone silsesquioxane) crosspolymer is blended as the powder component and Comparative Example 3 in which the powder component is not blended, carbon black, which is a pseudo air pollutant, can be adsorbed and precipitated. In contrast, in Example 1 and Comparative Example 1 in which magnesium aluminometasilicate or silica was blended, carbon black was precipitated to form a transparent layer.

Example 2 pH Buffering Effect A sample was prepared according to the same formulation as Table 1. The same simulated air pollutants as in Example 1 were mixed into each sample, and an acidic solution (1.1% by mass aqueous citric acid solution) was further added 9 times the amount (by mass) of each sample, and then the pH of each sample was added. Was measured. The final composition of each sample after adding the acidic solution is as shown in Table 3 below.

In addition, the example whose pH value fluctuation | variation when adding an acidic solution is less than 1.0 was evaluated as "A", and the example which fluctuate | varied 1.0 or more was evaluated as "B."

As shown in Table 3, only Example 2 blended with magnesium aluminometasilicate maintained a pH close to neutral (the buffer capacity was shown) even when the acidic solution was added, but did not blend powder. In Comparative Example 4 and Comparative Examples 5 and 6 in which other powders were blended, it was not possible to prevent the acidification by the acidic solution.
That is, it has been confirmed that only the cosmetic formulated by combining the magnesium aluminometasilicate and the ultraviolet light protective agent exhibits all effects of adsorption of air pollutants, pH buffering and ultraviolet light protection.

Example 3: Formulation example (sunscreen cream)
Blending component Blending amount (mass%)
(1) Hydrophobized fine particle zinc oxide 20
(2) Hydrophobicized fine particle titanium oxide 2
(3) Ethylhexyl methoxycinnamate 7
(4) Decamethylcyclopentasiloxane 10
(5) Isopropyl myristate 5
(6) Mineral oil 1
(7) Isostearic acid 2
(8) Methyl siloxane network polymer 5
(9) Polyether modified silicone 4
(10) Organically Modified Bentonite 2
(11) Ion exchange water remaining amount (12) Glycerin 2.5
(13) 1,3-butylene glycol 5
(14) Alcohol 5
(15) Phenoxyethanol 0.5
(16) Citric acid 0.3
(17) Sodium citrate 0.2
(18) Magnesium metasilicate magnesium aluminum oxide 0.1
(19) Cellulose powder 1.0
(20) Green tea extract 0.1

Production method:
(1) to (10) were mixed and dispersed. Thereafter, the mixed and dissolved aqueous phase of (11) to (20) was added and mixed to obtain a target sunscreen cream.
The resulting sunscreen cream had all of the adsorbing ability of air pollutants, pH buffering ability and UV protection ability.

Example 4: Formulation example (sunscreen lotion (two-layer type))
Blending component Blending amount (mass%)
(1) Decamethylcyclopentasiloxane 20
(2) Isohexadecane 10
(3) Dimethylpolysiloxane 5
(4) Polyether modified silicone 2
(5) Magnesium metasilicate magnesium aluminate 1
(6) octocrylene 3
(7) Ethylhexyl methoxycinnamate 5
(8) Hydrophobized fine particle zinc oxide 12
(9) Hydrophobicized fine particle titanium oxide 5
(10) Polymethyl methacrylate spherical powder 3
(11) Crosslinkable silicone / reticular silicone block copolymer 3
(12) α-tocopherol 0.1
(13) Ion-exchanged water Remaining amount (14) 2-Amino-2-methyl-1,3-propanediol 1
(15) Phenyl benzimidazole sulfonic acid 2
(16) Glycerin 2
(17) 1,3-butylene glycol 3
(18) Paraben 0.2
(19) Citric acid 0.3
(20) Sodium citrate 0.1
(21) Silica 0.5

Production method:
(1) to (12) were mixed and dispersed. Thereafter, the mixed and dissolved aqueous phase of (13) to (21) was added and mixed to obtain a target sunscreen lotion.
The resulting sunscreen lotion had all of the adsorbing ability of air pollutants, pH buffering ability and ultraviolet light protecting ability.

The present invention includes the following aspects.
(1) containing (A) 0.001 to 10% by mass of magnesium aluminometasilicate and (B) 1 to 40% by mass of octyl methoxycinnamate and / or hexyl diethylaminohydroxybenzoylbenzoate; Feature skin care cosmetics.
(2) (C) The cosmetic according to (1), which further contains a porous powder.
(3) (D) The cosmetic according to (1) or (2), further comprising citric acid (salt).
(4) The cosmetic according to any one of (1) to (3), further comprising (E) an antioxidant.
(5) The cosmetic according to (1), wherein the cosmetic is a sunscreen cosmetic.
(6) The cosmetic according to (1), wherein the cosmetic is an anti-pollution sunscreen cosmetic.

Claims (1)

The invention described in the specification.