JP6689608B2 - Oil-in-water skin cosmetics - Google Patents

Description

  The present invention relates to an oil-in-water type skin cosmetic.

As a technique for improving the appearance of the skin by using a cosmetic, there are those described in Patent Documents 1 and 2.
Patent Document 1 (JP 2001-172120 A) describes a cosmetic composition such as a makeup and / or care composition containing a soft focus filler and a fatty phase having a non-volatile fraction. ing. And in such a composition in which such composition contains at least one fluorescent substance and the weight ratio of the soft focus filler to the non-volatile fraction of the fatty phase is in a specific range, the composition is more homogeneous and more uniform, and the transparency is It is said to be bright and bright, and give a bright porcelain-like skin color.

  Further, Patent Document 2 (Japanese Patent Laid-Open No. 2007-518748) provides a composition having suitable optical properties for providing both soft focus and transparency effects in one system and providing excellent skin feel. As a technique for cross-linking silicone elastomers, zinc oxide or zirconium oxide having an average particle size of less than 300 nm, small disc-shaped light-reflecting inorganic material particles having an average particle size of 10,000 to 30,000 nm, and cosmetically acceptable Cosmetic compositions containing said carrier system are described.

  Patent Document 3 (Japanese Patent Laid-Open No. 5-117127) describes that a phosphor is mixed with cosmetics. According to the document, by adding an inorganic phosphor as a phosphor to be added to a fluorescent cosmetic, light resistance and safety are significantly improved.

JP 2001-172120 A Japanese Patent Publication No. 2007-518748 JP-A-5-117127

By the way, in recent years, people's consciousness for health and aesthetics have been increasing due to environmental changes such as global warming.
Further, there is a demand for cosmetics having an excellent ultraviolet protection effect, and the required properties thereof are increasing. However, further protection effects are desired against the recent highly required properties.
However, even if the techniques described in the above-mentioned patent documents are used, there is room for improvement in the balance between the storage stability of the cosmetics and the ultraviolet protection effect.

  In addition, when the present inventors have studied from the viewpoint of the durability of the cosmetic effect, when the cosmetic is applied and used in various environments, it is not possible to sufficiently secure the brightness of the skin after use. It became clear that there is. It was also revealed that increasing the content of the fluorescent pigment in order to maintain the brightness of the skin gives artificial texture.

  As a result of studies by the present inventors, a fluorescent zinc oxide having a specific size, an ultraviolet absorber, a non-volatile oil that is liquid at 25 ° C. and a water-soluble polymer are used, and By using a specific agent and a non-volatile oil that is liquid at 25 ° C in a specific ratio, the cosmetic has excellent storage stability, and also has a UV protection effect and natural skin brightness regardless of the environment in which it is used. It has been found that the effects are well-balanced and, for example, an oil-in-water type skin cosmetic having excellent environment resistance such as natural skin brightness after being exposed to sunlight and spraying soot can be obtained.

That is, according to the present invention, the following components (A) to (D):
(A) 1 to 20% by mass of fluorescent zinc oxide having a number average particle size of 1.6 to 4 μm,
(B) UV absorber 1 to 15% by mass,
(C) Non-volatile oil that is liquid at 25 ° C. other than the component (B) 1% by mass or more and less than 20% by mass, and (D) Water-soluble polymer 0.1-2% by mass
An oil-in-water skin cosmetic containing
In the oil-in-water skin cosmetic, the mass ratio of the total content of the components (B) and (C) to the content of the component (A) (((B) + (C)) / (A)). The oil-in-water type skin cosmetic composition of 1 to 10 is provided.

  According to the present invention, it is possible to obtain an oil-in-water skin cosmetic having excellent storage stability of cosmetics and an excellent balance between the effect of protecting ultraviolet rays and the effect of obtaining natural skin brightness regardless of the use environment. You can

The oil-in-water (O / W) type skin cosmetic in the present embodiment is a composition containing the following components (A) to (D).
(A) Fluorescent zinc oxide having a number average particle size of 1.6 to 4 μm (B) UV absorber (C) Non-volatile oil (D) highly water-soluble at 25 ° C. other than the component (B) molecule

Hereinafter, each component will be described with reference to specific examples. In addition, each component can be contained in the cosmetic alone or in combination of two or more.
Further, hereinafter, the “oil-in-water skin cosmetic” in the present embodiment will be simply referred to as “cosmetic” as appropriate.

(Component (A))
The component (A) is fluorescent zinc oxide having a number average particle size of 1.6 to 4 μm.
More specifically, the component (A) is a phosphor powder composed of zinc oxide, and is a particle having a number average particle diameter of 1.6 to 4 μm. The fluorescent zinc oxide as the component (A) may be any one that can be used in cosmetics. As the component (A), the surface of the surface of which is known by a known method, specifically, the surface of which is hydrophobized, may be contained in the cosmetic composition.

  Surface treatment methods include silicone treatment of methylhydrogenpolysiloxane, methylpolysiloxane, etc .; fluorine treatment with perfluoroalkyl phosphate ester, perfluoroalcohol etc .; amino acid treatment with N-acyl glutamic acid etc .; octyltriethoxysilane, octyl Examples include treatment with alkylalkoxysilane such as trimethoxysilane; treatment with lecithin; treatment with metal soap; treatment with fatty acid; treatment with alkyl phosphate. Among fluorescent zinc oxides, zinc oxide treated with silicone is preferably used.

  The number average particle diameter of the component (A) is preferably 1.6 μm or more, from the viewpoint of improving environmental resistance such as natural skin brightness after being exposed to sunlight and spraying soot, and preferably Is 2.0 μm or more, 4 μm or less, and preferably 3.5 μm or less.

  Here, the number average particle diameter of zinc oxide is, for example, a transmission electron microscope (TEM), the maximum minor axis of 100 particles in the image is measured under the condition of 2500 magnification, It is obtained by calculating the average value per Here, the maximum shortest diameter means the shortest diameter having the largest diameter among the shortest diameters orthogonal to the longest diameter.

In addition, as the fluorescence characteristic of the component (A), when a zinc oxide thin film having a film thickness of 2 to 10.0 μm is formed and a fluorescence spectrum is measured by a spectrofluorometer, the wavelength at which the fluorescence intensity is maximum is preferably It is within the range of 400 to 700 nm, more preferably within the range of 450 to 650 nm, and even more preferably within the range of 450 to 550 nm.
Further, the excitation wavelength in the fluorescent zinc oxide of the component (A) is preferably in the ultraviolet region, more preferably in the wavelength region of 300 to 400 nm.
The evaluation of the fluorescence characteristic of the component (A) can be performed according to the method described in JP-A-10-120419, for example.

The content of the component (A) in the cosmetic is from 1% by mass or more, preferably 1.0% by mass or more, and more preferably from the viewpoint of improving the ultraviolet protection effect of the cosmetic. It is 1.5% by mass or more, more preferably 2% by mass or more, and 20% by mass or less, preferably 15% by mass or less, more preferably 10% by mass or less, further preferably 5% by mass. % Or less.
From the viewpoint of improving the natural brightness of the skin, the content of the component (A) in the cosmetic is 1% by mass or more, preferably 1.5% by mass or more, based on the total amount of the cosmetic. It is preferably 5% by mass or more, more preferably 7% by mass or more, and 20% by mass or less, preferably 15% by mass or less, and more preferably 10% by mass or less.

(Component (B))
The component (B) is an ultraviolet absorber.
As the component (B), known ones can be used, and examples thereof include salicylic acid-based ultraviolet absorbers such as homomenthyl salicylate, octyl salicylate, and triethanolamine salicylate;
2-Ethylhexyl paramethoxycinnamate (for example, Ubinal MC80; manufactured by BASF), glyceryl mono-2-ethylhexanoate diparamethoxycinnamate, methyl 2,5-diisopropylcinnamate, 2,4,6-tris. [4- (2-Ethylhexyloxycarbonyl) anilino] -1,3,5-triazine (hereinafter, also referred to as “ethylhexyltriazone”. For example, Ubinal T150; manufactured by BASF), methyl bis (trimethyl) trimethoxycinnamate Siloxy) silyl isopentyl, isopropyl paracinnamate isopropyl / diisopropyl cinnamate mixture, p-methoxyhydrocinnamic acid diethanolamine salt, and other cinnamic acid-based UV absorbers;
Benzoylmethane-based UV absorption such as 2-phenyl-benzimidazole-5-sulfuric acid, 4-isopropyldibenzoylmethane, 4-tert-butyl-4′-methoxydibenzoylmethane (for example, Parasol 1789; manufactured by DSM Nutrition Japan). Agent;
Octocrylene (for example, Parasol 340; manufactured by DSM Nutrition Japan), 2-methoxyhexyl dimethoxybenzylidenedioxoimidazolidinepropionate (for example, soft shade DH; manufactured by Ajinomoto Co.), 1- (3,4-dimethoxyphenyl) -4, 4-dimethyl-1,3-pentanedione, cinoxate, methyl-O-aminobenzoate, 3- (4-methylbenzylidene) camphor, octyltriazone, hexyl diethylaminohydroxybenzoylbenzoate (for example, Ubinal Aplus; manufactured by BASF), Bisethylhexyloxyphenol methoxyphenyltriazine (for example, Tinosorb S; manufactured by BASF), methylenebisbenzotriazolyltetramethylbutylphenol (for example, Tinosorb M From BASF) can be mentioned may include one or more selected from these in cosmetics.

  Among these, 2-ethylhexyl paramethoxycinnamate (for example, Ubinal MC80; manufactured by BASF), 2,4,6-tris [4- (2-ethylhexyl), from the viewpoint of improving the ultraviolet absorption effect of cosmetics. Oxycarbonyl) anilino] -1,3,5-triazine (for example, Ubinal T150; manufactured by BASF), 4-tert-butyl-4′-methoxydibenzoylmethane (for example, parasol 1789; manufactured by DSM Nutrition Japan), octocrylene (For example, Parasol 340; manufactured by DSM Nutrition Japan), 2-ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate (for example, soft shade DH; manufactured by Ajinomoto Co.), hexyl diethylaminohydroxybenzoyl benzoate (even For example, one selected from Ubinal Aplus; manufactured by BASF), bisethylhexyloxyphenol methoxyphenyltriazine (for example, Tinosorb S; manufactured by BASF), and methylenebisbenzotriazolyltetramethylbutylphenol (for example, Tinosorb M; manufactured by BASF) or Two or more types are preferable, and 2-ethylhexyl paramethoxycinnamate (for example, Ubinal MC80; manufactured by BASF), 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,3. 5-triazine (for example, Ubinal T150; manufactured by BASF), hexyl diethylaminohydroxybenzoylbenzoate (for example, Ubinal Aplus; manufactured by BASF), bisethylhexyloxyphenol methoxyphenyltriazine ( For example, one or more selected from Tinosorb S; manufactured by BASF) is more preferable, and it is further preferable to combine two or more thereof, and 2-ethylhexyl paramethoxycinnamate (for example, Ubinal MC80; manufactured by BASF), Hexyl diethylaminohydroxybenzoylbenzoate (for example, Ubinal Aplus; manufactured by BASF) and bisethylhexyloxyphenol methoxyphenyltriazine (for example, Tinosorb S; manufactured by BASF) are more preferably one or more selected from two or more kinds. Even more preferred is the combination.

  The content of the component (B) in the cosmetic is 1% by mass or more based on the whole cosmetic from the viewpoint of improving the ultraviolet protection effect of the cosmetic and improving the brightness of natural skin. , Preferably 1.0% by mass or more, more preferably 2% by mass or more, further preferably 3% by mass or more, still more preferably 5% by mass or more, and 15% by mass or less, preferably 12% by mass. % Or less, more preferably 10% by mass or less.

(Component (C))
The component (C) is a non-volatile oil which is liquid at 25 ° C. other than the component (B).
Here, the oil that is liquid at 25 ° C. is an oil agent having a melting point of 25 ° C. or less. That is, the component (C) is an oil agent having fluidity at 25 ° C. under 1 atm. The melting point is measured according to the third method described in the standard of cosmetic raw materials.
As the component (C), the viewpoint of improving the storage stability of the cosmetic, the viewpoint of improving the balance between the ultraviolet protection effect and the effect of obtaining natural skin brightness regardless of the use environment, and suppressing stickiness From this viewpoint, the viscosity at 25 ° C. is preferably 500 mPa · s or less, more preferably 5 to 100 mPa · s, further preferably 5 to 50 mPa · s.
The viscosity can be measured at 25 ° C. with a B-type viscometer (TOKI SANGYO VISCOMETER TVB-10M, manufactured by Toki Sangyo Co., Ltd.) and a rotor 1 under the conditions of 60 rpm and 1 minute.

Further, the non-volatile oil refers to one having an evaporation amount of less than 20% at 25 ° C. for 6 hours, which is measured by the following method.
That is, a 90 mm diameter filter paper is placed in a glass dish having a diameter of 120 mm, 1 g of the sample is placed on the filter paper, and the sample is stored in a 65% RH room (25 ° C.). Then, the residue of the sample after 6 hours is measured, and the evaporation amount is calculated.

  Specific examples of the component (C) are non-volatile oils other than the component (B) that are liquid at 25 ° C., such as ester oil, silicone oil, hydrocarbon oil, higher fatty acid having 12 to 22 carbon atoms, and carbon number. 12 to 22 higher alcohols may be mentioned.

  Among these, specific examples of the ester oil as the component (C) include isononyl isononanoate, isotridecyl isononanoate, octyldodecyl myristate, isopropyl myristate, isocetyl myristate, glyceryl tri-2-ethylhexanoate, di-2-sebacate. Ethylhexyl, diisopropyl sebacate, glyceryl tri (caprylic / capric acid), diisostearyl malate, alkyl benzoates such as alkyl benzoate (C12-C15), diethylene glycol dicaprate, neopentyl glycol dicaprate, di2-ethyl. One or more selected from the group consisting of neopentyl glycol hexanoate, isopropyl palmitate, ethylhexyl palmitate and 2-hexyldecyl palmitate may be mentioned. That.

  Further, as an ester oil as the component (C), it is contained in the cosmetic together with the components (A), (B) and (D) to improve the ultraviolet protection effect and the natural skin brightness. Monoester of 12-18 fatty acid and branched alcohol having 14-22 carbon atoms, triester of branched fatty acid having 6-18 carbon atoms and glycerin, dicarboxylic acid having 2-18 carbon atoms and branched chain having 2-18 carbon atoms Diester with alcohol, alkyl benzoate (C12 to C15) (for example, Finsolve TN; manufactured by Innospec Active Chemicals LLC) and the like are preferable, and specifically, octyldodecyl myristate, isocetyl myristate, glyceryl tri-2-ethylhexanoate, Diisopropyl sebacate, di2-ethylhexyl sebacate, neopentylglycol di2-ethylhexanoate , One or more selected from neopentyl glycol dicaprate, alkyl benzoate (C12 to C15), and diisostearyl malate are more preferable. In addition to the above viewpoints, a phase with an ultraviolet absorber in cosmetics From the viewpoint of enhancing the solubility and improving the ultraviolet protection effect, one or more selected from neopentyl glycol dicaprate and alkyl benzoates (C12 to C15) are more preferred.

In addition, since the cosmetic contains silicone oil as the component (C), the balance between the storage stability of the cosmetic, the ultraviolet protection effect and the effect of obtaining natural skin brightness regardless of the use environment, and The non-stickiness can be further improved.
As a specific example of the silicone oil as the component (C), dimethylpolysiloxane is preferable from the same viewpoint, and dimethylpolysiloxane having a viscosity at 25 ° C. of 20 mPa · s or less is more preferable.

  Examples of the hydrocarbon oil as the component (C) include liquid paraffin, liquid isoparaffin such as hydrogenated polyisobutene, heavy liquid isoparaffin, liquid ozokerite, squalane, pristane, squalene and isohexadecane, and preferably isohexadecane and liquid isoparaffin. It is one or more selected from, and more preferably one or more selected from branched aliphatic hydrocarbon oils such as isohexadecane and hydrogenated polyisobutene.

  Examples of the higher fatty acid having 12 to 22 carbon atoms as the component (C) include a nonvolatile fatty acid having 12 to 22 carbon atoms and being liquid at 25 ° C. More specifically, oleic acid and isostearine. Acid, linoleic acid, and linoleic acid are mentioned.

Examples of the higher alcohol having 12 to 22 carbon atoms as the component (C) include oleyl alcohol, 2-decyltetradecinol, dodecanol, isostearyl alcohol, and octyldodecanol.
Further, the component (C) may be a naturally-derived one such as olive oil.

In addition, it is contained in the cosmetics together with the components (A), (B) and (D) to enhance the ultraviolet protection effect and to withstand the natural brightness of the skin after being exposed to sunlight and spraying soot. From the viewpoint of enhancing environmental properties, the component (C) preferably contains one or more kinds of non-volatile oils which are liquid at 25 ° C. selected from ester oils, hydrocarbon oils and silicone oils, and more preferably Is one or more selected from the group consisting of alkyl benzoate (C12-15), neopentyl glycol dicaprate, isohexadecane, hydrogenated polyisobutene and dimethylpolysiloxane.
From the same viewpoint, it is preferable that the component (C) contains at least one selected from ester oils and hydrocarbon oils, and more preferably contains alkyl benzoate (C12 to C15) and neopentyl glycol dicaprate. preferable.

The content of the component (C) in the cosmetic is 1% by mass or more, preferably 3% by mass or more, and more preferably 5% by mass based on the total amount of the cosmetic, from the viewpoint of improving the ultraviolet protection effect of the cosmetic. % And less than 20% by mass, preferably 18% by mass or less, and more preferably 15% by mass or less.
From the viewpoint of improving the natural brightness of the skin, the content of the component (C) in the cosmetic is 1% by mass or more, preferably 3% by mass or more, and more preferably It is 7% by mass or more and less than 20% by mass, preferably 15% by mass or less, and more preferably 10% by mass or less.

In addition, the total content ((B) + (C)) of the components (B) and (C) in the cosmetic is preferably from the viewpoint of improving the ultraviolet protection effect of the cosmetic, with respect to the entire cosmetic. 5% by mass or more, more preferably 10% by mass or more, further preferably 12% by mass or more, and preferably 25% by mass or less, more preferably 20% by mass or less, further preferably 17% by mass. It is the following.
From the viewpoint of improving the natural brightness of the skin, the total content ((B) + (C)) of the components (B) and (C) in the cosmetic is preferably based on the total amount of the cosmetic. 5 mass% or more, more preferably 10 mass% or more, further preferably 15 mass% or more, and preferably 25 mass% or less, more preferably 22 mass% or less, further preferably 20 mass%. It is the following.

In the cosmetic, the mass ratio (((B) + (C)) / (A)) of the total content of the components (B) and (C) to the content of the component (A) is From the viewpoint of improving the ultraviolet protection effect, it is 1 or more, preferably 2 or more, more preferably 3 or more, further preferably 5 or more, and 10 or less, preferably 9 or less.
From the viewpoint of improving the natural brightness of the skin, the total mass ratio of the contents of the components (B) and (C) to the content of the component (A) in the cosmetic (((B) + (C )) / (A)) is 1 or more, preferably 1.0 or more, more preferably 1.5 or more, still more preferably 1.8 or more, and 10 or less, preferably 5 or less. , And more preferably 3 or less.

(Component (D))
The component (D) is a water-soluble polymer.
The component (D) is not limited as long as it is water-soluble, and known ones can be used.
For example, proteins or polypeptides such as gelatin and collagen;
Polysaccharides such as hyaluronic acid and its salts, xanthan gum, chondroitin sulfate and its salts, dextrin, pectin, gellan gum, carrageenan and pullulan;
Alkyl-modified carboxyvinyl polymers, polyacrylamides, copolymers of acrylamide and acrylic acid, copolymers obtained by copolymerizing at least acrylate or hydroxyalkyl acrylate and acryloyldimethyltaurine salt, etc. Acrylic acid polymer and polyvinyl alcohol;
Cellulosic polymers such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose;
Alginic acid-based polymers such as alginic acid and its salts;
Examples include carboxymethyl chitin and chitosan.
Further, as the copolymer obtained by copolymerizing at least an acrylate salt or a hydroxyalkyl acrylate and an acryloyldimethyltaurine salt, a copolymer of an acrylate salt and an acryloyldimethyltaurine salt, a hydroxyalkyl acrylate and acryloyl salt In addition to the copolymer with dimethyltaurine salt, copolymers of acrylic acid, acrylic acid amide, acrylic acid salt and acryloyl dimethyltaurine salt may be mentioned.
As the component (D), these may be contained in the cosmetic composition in an appropriate combination of one kind or two or more kinds.

  From the viewpoint of easy application to various dosage forms among these water-soluble polymers, the component (D) is preferably selected from the group consisting of acrylic acid-based polymers, polysaccharides and cellulose-based polymers. 1 or 2 or more, more preferably an acrylic acid-based polymer, and even more preferably an alkyl-modified carboxyvinyl polymer, at least an acrylate salt or a hydroxyalkyl acrylate, and acryloyldimethyltaurine. One or more selected from the group consisting of copolymers obtained by copolymerizing a salt with a salt, and even more preferably at least an acrylic acid salt or hydroxyalkyl acrylate and an acryloyldimethyltaurine salt. Copolymers obtained by polymerization, and particularly preferably acrylate and acryloyldimethyl A copolymer of Ulin salt.

Examples of the carboxyvinyl polymer include polymers containing acrylic acid or methacrylic acid as a constituent monomer, and specific examples thereof include Carbopol 980 and Carbopol 981 (all manufactured by Lubrizol Advanced Materials).
The alkyl-modified carboxyvinyl polymer is a polymer containing acrylic acid or methacrylic acid ester as an ester bond (alkyl modified) of acrylic acid or methacrylic acid with a fatty acid having 1 to 35 carbon atoms as a constituent monomer. Is mentioned. Among them, the one known as an alkyl acrylate / methacrylic acid copolymer (acrylic acid / alkyl acrylate (C10-30)) copolymer having an alkyl group having 10 to 30 carbon atoms is preferable from the viewpoint of suppressing stickiness. Specific examples thereof include Carbopol ETD2020, Carbopol 1382, Pemulen TR-1, Pemulen TR-2 (manufactured by BF Goodrich).
Specific examples of polyacrylamide include SEPIGEL 305 (manufactured by SEPPIC) and the like.
Examples of the copolymer of acrylamide and acrylic acid include acrylamide / ammonium acrylate) copolymer, and specific examples thereof include SEPIPLUS 265 (manufactured by SEPPIC).
As a copolymer obtained by copolymerizing at least an acrylate salt or a hydroxyalkyl acrylate and an acryloyldimethyltaurine salt,
Examples of the copolymer of acrylate and acryloyl dimethyl taurine salt include (Na acrylate / acryloyl dimethyl taurine Na) copolymer, and specific examples include SIMULGEL EG (manufactured by SEPPIC) and the like;
Examples of the copolymer of hydroxyalkyl acrylate and acryloyl dimethyl taurine salt include (hydroxyethyl acrylate / acryloyl dimethyl taurine Na) copolymer, and specifically, SIMULGEL FL, SIMULGEL NS, SEPIPLUS S, SEPINOV EMT 10 (Above, manufactured by SEPPIC) and the like;
Examples of the copolymer of acrylic acid, acrylic acid amide, acrylic acid salt and acryloyl dimethyl taurine salt include polyacrylate-13, and specifically, SEPIPLUS 400 (manufactured by SEPPIC) and the like.

  The content of the component (D) in the cosmetic is 0.1% by mass or more based on the entire cosmetic from the viewpoint of improving the ultraviolet protection effect of the cosmetic and improving the brightness of natural skin. , Preferably 0.3% by mass or more, more preferably 0.5% by mass or more, and 2% by mass or less, preferably 1.5% by mass or less, more preferably 1% by mass or less. is there.

  In the present embodiment, the oil-in-water skin cosmetic contains a specific amount of components (A) to (D), and in particular, fluorescent zinc oxide of a specific size of component (A), It contains the component (B) ultraviolet absorber and the component (C) non-volatile oil which is liquid at 25 ° C. in a specific ratio. With such components and proportions, the cosmetic material according to the present embodiment has an excellent ultraviolet protection effect as well as a soft focus effect by fluorescence. Therefore, it is excellent in environmental resistance such as being able to maintain the natural brightness of the skin even after being exposed to sunlight and the natural brightness of the skin after being sprayed with soot. Further, the cosmetic material according to the present embodiment also has excellent storage stability.

In the present embodiment, the cosmetic may contain components other than the components (A) to (D) described above.
For example, the cosmetic in the present embodiment may contain water, and the content of water can be the balance excluding components other than water in the cosmetic. The content of water in the cosmetic is preferably 43% by mass or more, more preferably 50% by mass or more, and still more preferably 55% by mass or more, based on the entire cosmetic.

Further, in the present embodiment, from the viewpoint of improving the storage stability of the cosmetic and the natural brightness of the skin, the cosmetic preferably further contains a surfactant (component (E)).
As the surfactant of the component (E), known anionic surfactants, cationic surfactants, amphoteric surfactants and nonionic surfactants can be contained, but the viewpoint of improving the storage stability of cosmetics, and From the viewpoint of improving environmental resistance such as natural skin brightness after spraying soot, it is preferable to contain a nonionic surfactant.

As the nonionic surfactant, for example, ethylene glycol fatty acid ester such as ethylene glycol monostearate ester;
Polyethylene glycol (2) polyethylene glycol fatty acid ester such as monostearate ester;
Polyethylene glycol (5) polyethylene glycol alkyl ether such as decyl pentadecyl ether;
Polyethylene glycol (5) hydrogenated castor oil polyethylene glycol hydrogenated castor oil such as monoisolaurate;
Propylene glycol fatty acid ester;
Monoglycerin monofatty acid ester such as glycerin monoisostearate;
Monoglycerin difatty acid esters such as glycerin distearate, glycerin dilaurate, etc .;
Glycerin alkyl ether such as glycerin monoisostearyl ether;
Sorbitan fatty acid esters such as sorbitan monostearate and sorbitan oleate;
Polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monostearate and polyoxyethylene sorbitan oleate;
Fatty acid alkanolamides;
Of fatty acid dialkanolamides such as lauric acid diethanolamide, monofatty acid glyceryl ethers such as stearyl glyceryl ether, and silicone-based surfactants, excluding the non-volatile silicone oil which is liquid at 25 ° C. of the aforementioned component (C) And so on.

  The component (E) is preferably a sorbitan fatty acid ester and a poly (ethylene glycol) ester from the viewpoint of improving the storage stability of the cosmetic composition and the viewpoint of improving environmental resistance such as natural skin brightness after spraying soot. It contains one or more selected from the group consisting of oxyethylene sorbitan fatty acid ester, more preferably sorbitan monostearate, sorbitan oleate, polyoxyethylene sorbitan monostearate and polyoxyethylene sorbitan oleate. It includes one or more selected from the group.

  The content of the component (E) in the cosmetic composition is from the viewpoint of improving the storage stability of the cosmetic composition and the environment resistance such as natural skin brightness after spraying soot. The content is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.8% by mass or more, still more preferably 1.0% by mass or more, and , Preferably 2% by mass or less, more preferably 1.8% by mass or less, still more preferably 1.6% by mass or less.

Further, from the viewpoint of improving the storage stability of cosmetics, improving the balance between the effect of protecting against ultraviolet rays and the effect of obtaining natural skin brightness regardless of the environment in which they are used, and smoothing the areas to which the cosmetics have been applied. From the viewpoint of enhancing the feeling, it is preferable that the cosmetic further contains, as the component (F), a volatile oil which is liquid at 25 ° C. other than the component (B).
Component (F) is preferably a volatile silicone oil, more preferably a linear or cyclic organopolysiloxane which is liquid at 25 ° C. and is volatile.
Here, the volatile oil means an oil having an evaporation amount of 20% or more at 25 ° C. for 6 hours, which is measured by the following method.
That is, a 90 mm diameter filter paper is placed in a glass dish having a diameter of 120 mm, 1 g of the sample is placed on the filter paper, and the sample is stored in a 65% RH room (25 ° C.). Then, the residue of the sample after 6 hours is measured, and the evaporation amount is calculated.

  Among the volatile silicone oils, specific examples of linear organopolysiloxanes include octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, 1,1,1,3,5,5,5-heptamethyl- 3-[(trimethylsilyl) oxy] -trisiloxane may be mentioned.

  Among the volatile silicone oils, examples of the cyclic organopolysiloxane include 4- to 6-membered cyclic siloxanes having an alkyl group having 1 to 5 carbon atoms as a substituent, and specific examples thereof include octamethylcyclotetrasiloxane. Examples thereof include decamethylcyclopentasiloxane.

  As specific examples of commercially available volatile silicone oils, volatile silicones include KF-96A-1cs (Shin-Etsu Chemical Co., Ltd., octamethyltrisiloxane), KF-96A-1.5cs (Shin-Etsu Chemical Co., Ltd., Decamethyltetrasiloxane), KF-96A-2cs (Shin-Etsu Chemical Co., Ltd., dodecamethylpentasiloxane), KF-995 (Shin-Etsu Chemical Co., Ltd., decamethylcyclopentasiloxane), TMF-1.5 (Shin-Etsu Chemical Co., Ltd.) 1,1,1,3,5,5,5-heptamethyl-3-[(trimethylsilyl) oxy] -trisiloxane), SH200C Fluid 1cs (Toray Dow Corning octamethyltrisiloxane), SH200C Fluid 1.5cs (Toray Dow Corning decamethyltetrasiloxane), S 200C Fluid 2cs (Toray Dow Corning, dodecamethylpentasiloxane), SH245 Fluid (Toray Dow Corning, decamethylcyclopentasiloxane), TSF405A (Momentive Performance Materials, decamethylcyclopentasiloxane) ) Is mentioned.

  The content of the component (F) in the cosmetic is determined from the viewpoints of improving the storage stability of the cosmetic and improving the environmental resistance such as the natural brightness of the skin after spraying soot. The content is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, preferably 5% by mass or less, more preferably 3% by mass or less, and further preferably It is 2 mass% or less.

  In addition, the cosmetic of the present embodiment includes components other than the components described above, for example, an ultraviolet light scattering agent, an oily component other than components (B), (C) and (F), a fragrance, a moisturizer, an antiperspirant, Among the components used in cosmetic ingredients, medicinal ingredients, oil gelling agents, bactericides, pH adjusters, antioxidants, preservatives, alcohols having 1 to 5 carbon atoms and other ordinary cosmetics, those mentioned above Other than the above may be contained. In addition, these components are not limited to the use as each agent, but may be used for other purposes depending on the purpose, for example, a perfume as an antiperspirant.

For example, in the present embodiment, from the viewpoint of further enhancing the ultraviolet protection effect of the cosmetic, an ultraviolet scattering agent may be contained, and preferably an ultraviolet scattering agent composed of an inorganic powder may be contained. Further, two or more kinds of ultraviolet scattering agents may be used in combination.
Examples of the material of the ultraviolet scattering agent include titanium oxide, zinc oxide other than the component (A), iron oxide, zirconium oxide, aluminum oxide and the like. Further, examples of the ultraviolet scattering agent include fine particles of these materials and composite materials. The ultraviolet scattering agent preferably contains one kind or two or more kinds selected from titanium oxide and zinc oxide other than the component (A).

  The titanium oxide and zinc oxide used as the ultraviolet scattering agent may be titanium oxide and zinc oxide usually used in cosmetics. It is preferable that the cosmetic composition has a more excellent dispersibility, for example, a surface of which is subjected to a surface treatment by a known method, specifically, a hydrophobic treatment if necessary.

  Surface treatment methods include silicone treatment of methylhydrogenpolysiloxane, methylpolysiloxane, etc .; fluorine treatment with perfluoroalkyl phosphate ester, perfluoroalcohol etc .; amino acid treatment with N-acyl glutamic acid etc .; octyltriethoxysilane, octyl Examples include treatment with alkylalkoxysilane such as trimethoxysilane; treatment with lecithin; treatment with metal soap; treatment with fatty acid; treatment with alkyl phosphate. Among them, zinc oxide whose surface is treated with silicone is preferably used.

  The silicone used for the surface treatment is not limited, and examples thereof include methylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and octadecamethylcyclohexasiloxane. Methyltrisiloxane, tetradecamethylhexasiloxane, dimethylsiloxane-methyl (polyoxyethylene) siloxane-methyl (polyoxypropylene) siloxane copolymer, dimethylsiloxane-methyl (polyoxyethylene) siloxane copolymer, dimethylsiloxane-methyl (Polyoxypropylene) siloxane copolymer, dimethyl siloxane / methyl cetyloxy siloxane copolymer, dimethyl siloxane It can include various silicone oils such as pulse stearoyl carboxymethyl copolymer. Preferred are methyl hydrogen polysiloxane and methyl polysiloxane.

  As the zinc oxide, a commercially available product may be used, and if a specific example is shown, FINEX-50-LPTM (dimethicone treatment, Sakai Chemical Industry Co., Ltd.), MZ-300 (no surface treatment, Teika Co., Ltd.), MZ- 504R3M (hydrogen dimethicone treatment, manufactured by Teika), MZY-303S (hydrogen dimethicone treatment, manufactured by Teika), MZ-306X (triethoxysilylethyl polydimethylsiloxyethylhexyl dimethicone treatment, manufactured by Teika), MZ-200 (surface treatment). None, manufactured by Teika), MZY-203S (hydrogen dimethicone treatment, manufactured by Teika), MZ-150 (no surface treatment, manufactured by Teika), MZY-153S (hydrogen dimethicone treated, manufactured by Teika), FINEX-25 ( No surface treatment, Sakai Chemical Industry Co., Ltd., FINEX-25LP (Jime Con treatment, and manufactured by Sakai Chemical Industry Co., Ltd.) and the like. However, it is not limited to these examples.

  As the titanium oxide, a commercially available product may be used, and if a specific example is shown, fine particle titanium oxide MT-100TV (alumina, stearic acid treatment, manufactured by Teika), fine particle titanium oxide MTY-110M3S (alumina, silica, Hydrogen dimethicone treatment, manufactured by Teika) and the like.

  Further, when the titanium oxide or zinc oxide is in the form of particles, the number average particle diameter is, for example, 1 nm or more, preferably 5 nm or more, more preferably 8 nm or more, further preferably 10 nm or more. Further, it is, for example, 500 nm or less, preferably 300 nm or less, more preferably 100 nm or less, and further preferably 60 nm or less.

  Here, the number average particle diameter of titanium oxide or zinc oxide is, for example, a transmission electron microscope (TEM), and the maximum short diameter of 300 particles in an image is measured under a condition of 50,000 magnification. Then, it is obtained by calculating the average value per number. Here, the maximum shortest diameter means the shortest diameter having the largest diameter among the shortest diameters orthogonal to the longest diameter. For example, the number average particle diameter of MZ-504R3M measured by such a method is about 25 nm, and the number average particle diameter of particulate titanium oxide MT-100TV measured by such a method is about 15 nm.

The total content of titanium oxide, component (A) and other zinc oxide in the cosmetic composition is the viewpoint of improving the storage stability of the cosmetic composition, the viewpoint of preventing the skin from becoming too white, and the oil of the cosmetic composition. From the viewpoint of reducing the softness, it is preferably 30% by mass or less, more preferably 25% by mass or less, still more preferably 20% by mass or less, still more preferably 18% by mass or less, based on the whole cosmetic. .
Further, from the viewpoint of improving the ultraviolet protection effect of the cosmetic, the total content of titanium oxide, component (A) and other zinc oxide in the cosmetic is preferably 5% by mass or more with respect to the entire cosmetic. Yes, and more preferably 9% by mass or more. Further, from the viewpoint of obtaining the brightness of the skin, especially the brightness of the natural skin, it is preferably 20% by mass or less, and more preferably 15% by mass or less.
Further, from the viewpoint of obtaining natural skin brightness, the content of iron oxide in the cosmetic is preferably 3% or less, preferably 1% or less, more preferably 0.5% or less, and substantially 0%. More preferable.

Specific examples of oily components other than the components (B), (C) and (F) include solid alcohols having 12 to 22 carbon atoms such as cetanol, stearyl alcohol and behenyl alcohol at 25 ° C. and other 25 ° C. Solid oil agents can be mentioned.
Here, the solid oil agent at 25 ° C. means an oil agent having a melting point higher than 25 ° C. The melting point is measured according to the third method described in the standard of cosmetic raw materials.

  Specific examples of the moisturizer include glycerin, 1,3-butylene glycol, hyaluronic acid and salts thereof.

Ethanol is preferable as the alcohol having 1 to 5 carbon atoms from the viewpoint of improving the storage stability of the cosmetic.
The content of the alcohol having 1 to 5 carbon atoms in the cosmetic is preferably 1 to 20% by mass, and more preferably 2 to 2 from the viewpoint of improving the storage stability of the cosmetic. 15% by mass, more preferably 3 to 12% by mass.

Moreover, the cosmetics in the present embodiment may include powders other than the above-mentioned components, and specific examples thereof include inorganic powders and resin powders.
Specific examples of the material of the inorganic powder include silica, phlogopite, mica, composite powder of titanium oxide and mica, talc, borosilicate (Ca / Al), and the like.
Specific examples of the resin powder material include silicone resins such as (vinyl dimethicone / methicone silsesquioxane) crosspolymer.

The cosmetic according to the present embodiment can be manufactured according to a general method for manufacturing an oil-in-water emulsion cosmetic.
Specifically, the cosmetic according to this embodiment is obtained by the following procedure. That is, the component (D) and water are mixed at a temperature of about 25 ° C. to prepare an aqueous phase. On the other hand, at a temperature of about 80 ° C., the oil phase is prepared by mixing the component (B), the component (C) and other oily components as appropriate. Subsequently, the component (A) is added to the oil phase and mixed, and then cooled to about 25 ° C. with stirring. A cosmetic is obtained by adding an oil phase and other components to the aqueous phase and stirring.
Note that some of the component (B) may be solid as a simple substance, but in the cosmetic of the present embodiment, it is considered that the component (B) is in a liquid state by being heated, for example, in the manufacturing process.

  Further, the cosmetics obtained by the present embodiment include makeup bases, sunscreen cosmetics such as sunscreen cream, and the like. The dosage form may be, for example, emulsions, creams and the like.

In the present embodiment, the specific components (A) to (D) are contained in a specific amount, and the mass ratio (((B) + (C)) / (A)) is set in a specific range, so that makeup In addition to having excellent storage stability, the UV protection effect and the effect of obtaining natural skin brightness are well-balanced regardless of the use environment.For example, after sun exposure and after spraying soot. An oil-in-water type skin cosmetic having excellent environmental resistance such as skin brightness can be obtained.
Therefore, by using the cosmetic of the present embodiment, for example, it is possible to give the skin a natural brightness and effectively protect the skin from ultraviolet rays.
In addition, by using the cosmetic of the present embodiment, it becomes possible to suppress the stickiness of the skin, for example.
Further, the cosmetic material according to the present embodiment may be excellent in storage stability at a high temperature of, for example, about 50 ° C. More specifically, it becomes possible to obtain a cosmetic material which is excellent in the effect of suppressing separation and thickening when stored at a high temperature of about 50 ° C.

  The cosmetic of the present embodiment can be used by applying, preferably applying to the skin, especially the skin excluding the hair, preferably the face, body, limbs and the like. For example, by applying, preferably applying, the cosmetic of the present embodiment to the skin, it is possible to protect the ultraviolet rays while giving the skin a natural and preferable brightness, and it is also possible to suppress the stickiness of the skin. Become.

  Although the embodiments of the present invention have been described above, these are examples of the present invention, and various configurations other than the above can be adopted.

  In the following examples, according to the amount of components contained in the raw material, each raw material is blended so that the content of each component in the obtained composition is as described in each table, and an oil-in-water skin makeup is prepared. A composition of ingredients was obtained.

(Examples 1 to 6 and Comparative Examples 1 to 7)
The oil-in-water type skin cosmetics having the compositions shown in Table 1 and Table 2 were produced by the method described below, and the appearance of the skin after being exposed to sunlight for 1 hour as a UV protection effect and environment resistance test was measured by the method described below. On the other hand, the appearance of the skin after spraying soot and the storage stability of the cosmetics were evaluated. The results are also shown in Tables 1 and 2.

(Method of manufacturing cosmetics)
Water was added to the compounding tank and stirred at 25 ° C., as the component (D), a water-soluble polymer dispersion liquid (manufactured by SEPPIC, SIMULGEL EG: effective content 37.5% by mass) and other aqueous components were appropriately added. Then, an aqueous phase was prepared. On the other hand, at a temperature of 80 ° C., the component (B), the component (C) and other oily components were appropriately added and mixed to prepare an oil phase. After that, the component (A) was added to and mixed with the obtained oil phase, and then cooled to 25 ° C. with stirring. An oily phase and other components were added to the obtained aqueous phase and stirred to obtain milky white oil-in-water type skin cosmetics.

(Evaluation methods)
(UV protection effect)
28.5 mg of the cosmetic material obtained in each example was uniformly applied to a size of 5 cm × 5 cm of a polymethylmethacrylate (PMMA) plate (Helioplate HD6, manufactured by Helioscreen; roughness 6 μm), and left in a dark room for 15 minutes. Dried. Then, the transmittance at a wavelength of 300 nm was measured with UV-2000S (manufactured by Labsphere). Three plates were measured for one cosmetic, and the average transmittance was calculated at 15 points on each plate, totaling 15 points, and evaluated according to the following criteria.
5: Average transmittance less than 1% 4: Average transmittance 1% or more and less than 10% 3: Average transmittance 10% or more, less than 30% 2: Average transmittance 30% or more, less than 50% 1: Average transmittance 50 %that's all

(Environmental resistance test: How the skin looks after being exposed to sunlight for 1 hour)
Five professional panelists applied 50 mg of the cosmetic material obtained in each example to the size of 5 cm × 5 cm on their forearms and dried for 15 minutes. Then, the appearance of the skin after exposing the arm to sunlight for 1 hour was evaluated on a scale of 5 with 5 being a very bright skin color and 1 being a very dark skin color. The average of 5 professional panelists was calculated, and the value rounded to the first decimal place was used for evaluation.

(Environmental resistance test: Natural appearance of skin after spraying soot)
40 mg of the cosmetic material obtained in each example was applied to 5 cm × 4 cm white artificial leather, and dried until the next day. After that, the artificial leather was placed in a closed dirt chamber, and the appearance of the artificial leather after spraying soot by burning the filter paper was evaluated by the following criteria by five expert panelists. For each evaluation, 3 pieces of artificial leather were used for each cosmetic, the average of 5 professional panelists was calculated, and the value rounded to the first decimal place was used for the evaluation.
3: There is no change before and after spraying soot 2: It looks slightly dark after spraying soot 1: It looks very dark after spraying soot

(Storage stability of cosmetics)
50 g of the cosmetics obtained in each example was put in a glass bottle (wide-mouth standard bottle, PS-No. 6, manufactured by Tokyo Glass Co., Ltd.), sealed and stored at 50 ° C. for 1 month. After storage, one expert panelist visually evaluated the separation and the viscosity according to the following criteria.
(Separation)
3: A transparent liquid layer or no lump was observed 2: A transparent liquid layer of less than 5 mm or a lump was observed at the top 1: A transparent liquid layer of 5 mm or more was observed at the top or a lump (viscosity) )
A spatula (length 18 cm, width 0.5 cm) needs a depth of 1 cm and moves horizontally 1 cm in the cosmetic, and the force applied to the spatula at that time is stored at room temperature (25 ° C). Compared with the case, the following criteria evaluated.
3: Same strength as normal temperature storage product 2: Slightly stronger than normal temperature storage product, but actually usable 1: Clearly stronger than normal temperature storage product, not usable as cosmetics

The storage stability of the cosmetics was evaluated according to the following criteria from the two viewpoints of separation and viscosity described above.
3: Both separation and viscosity scores are 3
2: Separation and viscosity scores include 3 and 2 1: Separation and viscosity scores include 1

Details of the components described in Table 1 and Table 2 are shown below.
* 1 Silicone-treated fluorescent zinc oxide: manufactured by Sakai Chemical Industry Co., Ltd. (number average particle size 2.5 μm)
* 2-Ethylhexyl paramethoxycinnamate: BASF, Ubinal MC80
* 3 Alkyl benzoate (C12-15): Finnosolv TN, manufactured by Innospec Active Chemicals LLC
* 4 Sodium acrylate / sodium acryloyl dimethyl taurate copolymer: Effective component of SIMULGEL EG manufactured by SEPPIC (effective component 37.5% by mass)
* 5 Sorbitan monostearate: Kao, Leodol SP-S10V
* 6 Polyoxyethylene sorbitan monostearate: Kao, Leodol TW-S120V
* 7 Silicone-treated zinc oxide: MZ-504R3M (number average particle diameter 25 nm) manufactured by Teika.

  From Table 1 and Table 2, the cosmetics of each Example contain the components (A) to (D) in a specific amount, and the mass ratio (((B) + (C)) / (A)) is specific. Since it is in the range, it has excellent storage stability at 50 ° C and UV protection effect, and also has environmental resistance such as natural skin brightness after being exposed to sunlight for 1 hour and soot. It was excellent, and the balance of each effect was excellent as compared with that of each comparative example.

(Prescription examples 1 to 3)
Table 3 shows a prescription example of the oil-in-water type skin cosmetic.

Details of components other than those described above among the components shown in Table 3 are shown below.
* 8 Hexyl diethylaminohydroxybenzoylbenzoate: BASF, Ubinal A Plus
* 9 Ethylhexyltriazone: Ubinal T-150 manufactured by BASF
* 10 Bisethylhexyloxyphenol methoxyphenyl triazine: BASF, Tinosorb S
* 11 Neopentyl glycol dicaprate: Nisshin Oillio Group, Estemol N-01
* 12 Hydrogenated polyisobutene: NOF Corporation Pearl Ream EX
* 13 Dimethylpolysiloxane: manufactured by Shin-Etsu Chemical Co., Ltd., Silicone KF-96A-6CS.
* 14 Silicone treated titanium oxide: manufactured by Ishihara Sangyo, SI-titanium CR50
* 15 Stearic acid-treated titanium oxide: MT-100TV, manufactured by Teika
* 16 Decamethylcyclopentasiloxane: Silicone TSF405A manufactured by Momentive Performance Materials Japan, Inc.
* 17 Stearyl alcohol: manufactured by Higher Alcohol Industry, stearyl alcohol NX
* 18 Silicone-treated iron oxide: manufactured by Miyoshi Kasei, SI-Bengara Cloisonne * 19 Silicone-treated iron oxide: manufactured by Miyoshi Kasei, SI-Yellow * 20 Silicone-treated iron oxide: manufactured by Miyoshi Kasei, SI-black * 21 Silica: Sunsphere H-121, manufactured by AGC SITEC
* 22 Silicone treated synthetic phlogopite: PDM-20L (S) manufactured by Topy Industries, Ltd.
* 23 (Vinyl dimethicone / methicone silsesquioxane) cross polymer: KSP-100 manufactured by Shin-Etsu Chemical Co., Ltd.
* 24 Silicone treated borosilicate (Ca / Al): Nippon Sheet Glass Co., Ltd., Silky Flake FTD010FY-F01
* 25 Composite powder of titanium oxide and mica: made by BASF, flamenco sparkle blue

Claims (3)

The following components (A) to ( E ):
(A) Fluorescent zinc oxide having a number average particle size of 1.6 to 4 μm 1 to 20% by mass
(B) UV absorber 1 to 15% by mass
(C) Non-volatile oil that is liquid at 25 ° C other than the component (B) 1% by mass or more and less than 20% by mass (D) Water-soluble polymer 0.1-2% by mass
(E) An oil-in-water skin cosmetic containing a surfactant ,
In the oil-in-water skin cosmetic, the mass ratio of the total content of the components (B) and (C) to the content of the component (A) (((B) + (C)) / (A)). There, Ri 1 to 10 der,
The total content ((B) + (C)) of the components (B) and (C) in the oil-in-water skin cosmetic is 5 to 25% by mass based on the whole oil-in-water skin cosmetic. der Ru, oil-in-water skin cosmetics. The oil-in-water type skin cosmetic according to claim 1, further comprising a volatile oil that is liquid at 25 ° C other than the component (B). The total content of titanium oxide, the component (A) and other zinc oxide in the oil-in-water skin cosmetic is 20% by mass or less based on the whole oil-in-water skin cosmetic. Or the oil-in-water type skin cosmetic described in 2 .