JP2019094280A - Oil-in-water type emulsion cosmetic - Google Patents

Abstract

To provide an oil-in-water type emulsion cosmetic having excellent ultraviolet protecting effects, good temporal stability and water resistance and excellent rub resistance.SOLUTION: There is provided an oil-in-water type emulsion cosmetic which comprises the following components (A) to (C): (A) a liquid oily agent containing an oil-soluble organic ultraviolet light absorbent, (B) a salt-resistant water-soluble polymer and (C) a hydrophobized fine particle metal oxide powder, where the emulsion cosmetic contains 40 mass% or more of a component having an IOB value of 0.10 or more in the component (A) and 3 mass% or more and 30 mass% or less of the component (A) in the total amount of the cosmetic and the content mass ratio (C/A) of the component (C) to the component (A) is 0.4 or more and 1.0 or less.SELECTED DRAWING: None

Description

  The present invention relates to an oil-in-water emulsified cosmetic excellent in sunscreen effect.

  In recent years, the importance of sunscreen measures in daily life has been pointed out, and even in cosmetics having a protective effect against ultraviolet light, oil-in-water emulsion type sunscreen cosmetics that are easy to use continuously with a refreshing feeling of use Has been developed.

  In these oil-in-water emulsion cosmetic compositions, ultraviolet absorbers and metal oxide powders such as zinc oxide and titanium oxide are used in order to enhance the ultraviolet protection effect. However, when a large amount of metal oxide powder is blended, not only aggregation and sedimentation of the powder occur over time, but also there is a problem that the stability over time such as viscosity decrease, emulsion separation, precipitation and the like occurs.

  In order to improve these problems, oil-in-water emulsified cosmetics using water-soluble polymers such as polyacrylic acid amide, xanthan gum, (sodium acrylate / acryloyl dimethyl taurine) copolymer (see Patent Documents 1 and 2), An oil-in-water emulsion composition (see Patent Document 3) has been proposed which contains a side chain type amino-modified silicone and an amphiphilic substance having a HLB of 5 or less compatible with the silicone oil in a silicone oil-based oil phase. There is.

Japanese Patent Application Publication No. 2003-104859 JP, 2010-215602, A JP, 2009-209123, A

In the oil-in-water emulsion compositions described in Patent Documents 1 to 3, there is a problem that although the temporal stability of the oil-in-water emulsion composition is improved, a sufficient ultraviolet light protective effect can not be obtained.
To this problem, it is considered that sufficient UV protection ability can be exhibited by highly blending liquid oil capable of dissolving and dispersing organic UV absorber and metal oxide powder, but high blending of liquid oil It has been found that the water resistance and sweat resistance deteriorate and the ultraviolet light protective effect (durability) in actual use decreases, and the coating film is apt to be deformed and broken by friction.
Accordingly, an object of the present invention is to provide an oil-in-water emulsified cosmetic which has an excellent ultraviolet light protective effect, is stable with time, has good water resistance, and has excellent abrasion resistance.

  The present inventors use a specific amount of a liquid oil, a water-soluble salt-soluble polymer, and a hydrophobized fine metal oxide powder having an IOB value in a specific range, and a liquid of hydrophobized fine metal oxide powder. It is possible to obtain an oil-in-water emulsified cosmetic which has high stability over time and excellent ultraviolet protection ability and extremely excellent water resistance and abrasion resistance when the content mass ratio to the oil agent is in a specific range. And completed the present invention.

That is, the present invention is an oil-in-water emulsified cosmetic comprising the following components (A) to (C):
(A) Liquid oil containing oil-soluble organic UV absorber (B) Salt-tolerant water-soluble polymer (C) Hydrophobized fine particle metal oxide powder (A) Component having an IOB value of 0.10 or more in component 40 Containing by mass% or more, containing 3% by mass or more and 30% by mass or less of the component (A) in the total cosmetic, the content mass ratio (C / A) of the component (C) to the component (A) is 0.4 or more An oil-in-water emulsified cosmetic which is 1.0 or less.

  The oil-in-water emulsion cosmetic of the present invention has an excellent ultraviolet protective effect, and is stable over time, has good water resistance, and has excellent abrasion resistance.

The present invention is an oil-in-water emulsion cosmetic comprising the following components (A) to (C):
(A) Liquid oil containing oil-soluble organic UV absorber (B) Salt-tolerant water-soluble polymer (C) Hydrophobized fine particle metal oxide powder (A) Component having an IOB value of 0.10 or more in component 40 Containing by mass% or more, containing 3% by mass or more and 30% by mass or less of the component (A) in the total cosmetic, the content mass ratio (C / A) of the component (C) to the component (A) is 0.4 or more It is an oil-in-water emulsified cosmetic which is 1.0 or less.

In the present invention, "liquid" refers to a state in which it has fluidity under an atmosphere of 1 atm and 25 ° C, that is, a state in which it is under a temperature condition higher than the melting point (it does not have a melting point In the case of an amorphous substance, it refers to the state under the temperature condition above the melting point). Moreover, "solid state" means a state having no fluidity under an atmosphere of 25 ° C. under 1 atm, that is, a state under a temperature condition lower than the melting point (non-free state having no melting point). In crystalline materials, it refers to the condition under temperature conditions below the melting point.
In the present invention, the "IOB value" refers to the ratio of the inorganic value (IV) to the organic value (OV) in the organic conceptual diagram, that is, "inorganic value (IV) / organic value (OV)". The organic conceptual diagram is divided into two factors, organic (covalent bond) based on carbon number and inorganic (ion bondable) based on substituents, and mapped on rectangular coordinates named organic axis and inorganic axis It is known as one of the indicators for predicting the properties of organic compounds.
In the present invention, "oil-soluble" means that the solubility in water is 1 w / w% or less.

[Component (A): Liquid oil containing oil-soluble organic UV absorber]
The oil-in-water emulsified cosmetic of the present invention comprises (A) a liquid oil containing an oil-soluble organic ultraviolet absorber. (A) The liquid oil is an oil having fluidity at 25 ° C. under one atmosphere pressure as described above.
The component (A) contains an oil-soluble organic UV absorber in order to enhance the UV protection effect. As an oil soluble organic ultraviolet absorber, 1 type, or 2 or more types chosen from a liquid organic ultraviolet absorber and a solid organic ultraviolet absorber are mentioned. In the present invention, it is preferable to contain a liquid organic UV absorber and a solid organic UV absorber in the component (A) from the viewpoint of enhancing the UV protection effect.

  Examples of liquid organic UV absorbers include 2-ethylhexyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate, isopropyl paramethoxycinnamate and isopropyl diisopropylcinnamate mixture, methyl bismethoxytrimethoxycinnamate Siloxy) silylisopentyl, paradimethyl amino acid benzoate, paradimethyl amino acid benzoate 2-ethylhexyl, ethylene glycol salicylate, 2-ethylhexyl salicylate, benzyl salicylate, homomentyl salicylate, octocrylene, dimethyl diethyl benzalmalonate and the like. Among these, 2-ethylhexyl paramethoxycinnamate, 2-ethylhexyl salicylate, homomenthyl salicylate, octocrylene, and dimethyl diethyl benzalmalonate are preferable, and from the viewpoint of improving the emulsion state and the temporal stability, paramethoxysilicone is more preferable. 2-ethylhexyl crustate, octocrylene, dimethyldiethylbenzalmalonate, more preferably 2-ethylhexyl paramethoxycinnamate. The liquid organic ultraviolet absorber can be contained singly or in combination of two or more kinds. In addition, a liquid organic ultraviolet absorber may be contained in the component (A) also as a liquid oil.

As a solid organic UV absorber, 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine, 4-tert- Examples include butyl-4'-methoxydibenzoylmethane and 2-ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate. The solid organic UV absorbers can be contained singly or in combination of two or more.
Among these, preferably 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6- ( 4-methoxyphenyl) -1,3,5-triazine, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine, and 4-tert-butyl-4 '-Methoxydibenzoylmethane, more preferably 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] Phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine, and 2,4,6-tris [4- (2-ethylhexi) Roxycarbonyl) anilino] -1,3,5-triazine. The solid organic ultraviolet absorber in the present invention is considered to be present in a liquid state in the cosmetic.

  Examples of commercially available products of these components include UVINUL MC80 (2-ethylhexyl paramethoxycinnamate; manufactured by BASF), UVINUL APLUS (2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester; BASF AG TINOSORBS (2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine; manufactured by BASF), UVINULT-150 (2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine; manufactured by BASF, soft shade DH (dimethoxybenzylidene dioxoimidazolidine propionic acid 2) -Ethylhexyl; manufactured by Ajinomoto Co., PARSOL 1789 4-tert-butyl-4'-methoxydibenzoylmethane; DSM Co., Ltd.).

The oil agent other than the organic ultraviolet absorber contained in the component (A) is not particularly limited as long as it is a liquid in an environment of 25 ° C. under 1 atmosphere pressure, and an oil agent used for ordinary cosmetics can be mentioned. . Specifically, α-olefin oligomers, liquid isoparaffins, liquid paraffins, hydrocarbon oils such as squalane; glyceryl trioctanoate, avocado oil, olive oil, sesame oil, rice bran oil, safflower oil, soybean oil, soybean oil, corn oil, rapeseed oil, Triglycerides such as castor oil, cottonseed oil and mink oil; fatty acids such as oleic acid and isostearic acid; isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl oleate, ethyl linoleate, isopropyl linoleate, cetyl caprylate, lauric acid Hexyl, decyl myristate, decyl oleate, oleyl oleate, isostearyl laurate, isotridecyl myristate, isocetyl myristate, isostearyl myristate, octyl dodecy myristate Octyl palmitate, isocetyl palmitate, isostearyl palmitate, propylene glycol dioleate, isodecyl oleate, isopropyl isostearate, cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, propylene glycol dicaprate, propylene glycol dioleate Ester oil such as glyceryl tri-2-ethylhexanoate, glyceryl tri (capryl caprylic acid), triethylhexanoin, isononyl isononanoate, diisopropyl sebacate, propylene glycol isostearate, alkyl benzoate, etc .; Examples thereof include branched or unsaturated higher alcohols such as stearyl alcohol and oleyl alcohol; dimethylpolysiloxane and the like. The above-mentioned oil agents can be contained alone or in combination of two or more kinds.
Among these, preferably isopropyl palmitate, isocetyl myristate, cetyl 2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, glyceryl tri (capryl capric acid), triethylhexanoin, isononyl isononanoate, diisopropyl sebacate, Propylene glycol isostearate, alkyl benzoate C12-15, more preferably isopropyl palmitate, triethylhexanoin, isononyl isononanoate, diisopropyl sebacate, alkyl benzoate C12-15.

  The component (A) contains 40% by mass or more of a component having an IOB value of 0.10 or more, preferably an IOB value of 0.10 or more and 0.60 or less, more preferably an IOB value of 0.10. 40 mass% or more contains the component of 0.40 or less. The component (A) has an IOB value of 0.10 or more and contains 40% by mass or more, thereby adjusting the oily feeling and dissolving the solid organic UV absorber in the liquid oil agent (A) It is possible to improve the property and enhance the ultraviolet light protection effect.

  Specific examples of the component having an IOB value of 0.10 or more include oleic acid (IOB value = 0.42), isostearic acid (IOB value = 0.43), isopropyl myristate (IOB value = 0.18) ) Butyl myristate (IOB value = 0.17), isopropyl palmitate (IOB value = 0.16), ethyl oleate (IOB value = 0.16), cetyl caprylate (IOB value = 0.13), Hexyl laurate (IOB value = 0.17), decyl myristate (IOB value = 0.13), decyl oleate (IOB value = 0.11), isostearyl laurate (IOB value = 0.10), myristin Isotridecyl acid (IOB value = 0.11), isocetyl myristate (IOB value = 0.10), isostearyl myristate (IOB value = 0.10), Octyl mytate (IOB value = 0.13), Propylene glycol dioleate (IOB value = 0.16), Isodecyl oleate (IOB value = 0.11), Isopropyl isostearate (IOB value = 0.15), 2 -Cetyl ethylhexanoate (IOB value = 0.13), stearyl 2-ethylhexanoate (IOB value = 0.22), propylene glycol dicaprate (IOB value = 0.26), glyceryl tri-2-ethylhexanoate IOB value = 0.35), tri (caprylic capric acid) glyceryl (IOB value = 0.33), triethylhexanoin (IOB = 0.35), isononyl isononate (IOB value = 0.12), sebacic acid Diisopropyl (IOB value = 0.4), Propylene glycol isostearate (IOB value = 0.4) Alkyl benzoate C12-15 (IOB value = 0.184), 2-octyldodecanol (IOB value = 0.26), isostearyl alcohol (IOB value = 0.29), oleyl alcohol (IOB value = 0.28 ), 2-ethylhexyl paramethoxycinnamate (IOB value = 0.28), 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester (IOB value = 0.68), 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine (IOB value = 0.43), 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine (IOB value = 0.55), dimethoxybenzylidene dioxoimidazo Examples thereof include 2-ethylhexyl lysine propionate (IOB value = 1.00), 4-tert-butyl-4'-methoxydibenzoylmethane (IOB value = 0.47) and the like.

The content ratio of the component having an IOB value of 0.10 or more contained in the component (A) is 40% by mass or more, preferably 60% by mass or more, more preferably 80% by mass or more, further preferably 90% by mass or more More preferably, it is 95 mass% or more, and preferably 100 mass% or less. Specifically, 40 to 100% by mass is preferable, 60 to 100% by mass is more preferable, 80 to 100% by mass is more preferable, 90 to 100% by mass is more preferable, and 95 to 100% by mass is more preferable.
The content ratio of the component having an IOB value of 0.10 or more and 0.60 or less contained in the component (A) is preferably 40% by mass or more, more preferably 50% by mass or more, and still more preferably 65% by mass or more Also, it is preferably 100% by mass or less, more preferably 99% by mass or less, and still more preferably 95% by mass or less. Specifically, 40 to 100% by mass is preferable, 50 to 99% by mass is more preferable, and 65 to 95% by mass is more preferable.

  The content of the component (A) with respect to the total amount of the cosmetic is 3% by mass or more and 30% by mass or less from the viewpoint of being excellent in water resistance and abrasion resistance, and maintaining the ultraviolet light protective effect. Moreover, 5 mass% or more is preferable, 10 mass% or more is more preferable, 15 mass% or more is more preferable, 25 mass% or less is preferable, and, as for content of (A) component, 20 mass% or less is more preferable. Specifically, it is 3 to 30% by mass, preferably 5 to 25% by mass, more preferably 10 to 20% by mass, and still more preferably 15 to 20% by mass.

  30 mass% or more is preferable, as for content with respect to (A) component of the said oil-soluble organic ultraviolet absorber, 40 mass% or more is more preferable, 50 mass% is more preferable, 80 mass% or less is preferable, and 75 mass % Or less is more preferable, and 70 mass% or less is more preferable. Specifically, 30 to 80% by mass is preferable, 40 to 75% by mass is more preferable, and 50 to 70% by mass is more preferable. If it is in the said range, an ultraviolet-ray protective effect can be heightened, reducing liquid oil content.

  15 mass% or more is preferable, as for content with respect to (A) component of a liquid organic ultraviolet absorber, 25 mass% or more is more preferable, 35 mass% or more is further more preferable, 60 mass% or less is preferable, 55 mass% The following are more preferable, and 50 mass% or less is more preferable. Specifically, 15 to 60% by mass is preferable, 25 to 55% by mass is more preferable, and 35 to 50% by mass is more preferable. If it is in the said range, while a favorable ultraviolet-ray protective effect is acquired, stability over time and a feeling of use are also favorable.

  10 mass% or more is preferable, 12 mass% or more is more preferable, 15 mass% or more is further more preferable, 35 mass% or less is preferable, and content with respect to (A) component of a solid organic ultraviolet absorber is preferable, and 30 mass%. % Or less is more preferable, and 25 mass% or less is more preferable. Specifically, 10 to 35% by mass is preferable, 12 to 30% by mass is more preferable, and 15 to 25% by mass is more preferable. If it is in the said range, while a favorable ultraviolet-ray protective effect is acquired, stability and a usability | use_condition are also favorable.

  The content of the solid organic UV absorber relative to the total amount of the oil-soluble organic UV absorber is preferably 10% by mass or more, more preferably 20% by mass or more, further preferably 25% by mass or more, and 60% by mass or less Preferably, 50% by mass or less is more preferable, and 40% by mass or less is more preferable. Specifically, 10 to 60% by mass is preferable, 20 to 50% by mass is more preferable, and 25 to 40% by mass is more preferable. If it is in the said range, while a favorable ultraviolet-ray protective effect is acquired, stability and a usability | use_condition are also favorable.

[(B) component: salt resistant water soluble polymer]
The oil-in-water emulsion cosmetic of the present invention contains (B) a salt-tolerant water-soluble polymer.
Examples of the salt-resistant water-soluble polymer (B) used in the present invention include polyacrylamides, acrylamide copolymers, hydrophobic modified polyether polyurethanes, and the like. The (B) salt-tolerant water-soluble polymer can be contained singly or in combination of two or more.
In the present invention, the "water-soluble polymer" means a polymer which swells and exhibits a thickening effect by being mixed with water. Also, "salt resistance" refers to the property that the viscoelasticity is hardly reduced extremely even if a salt or a metal oxide is added in the range blended with the cosmetic.
Acrylamide-based copolymers include copolymers containing acrylamide and / or acryloyldimethyl taurine as a structural unit.

As a copolymer containing acrylamide and / or acryloyldimethyl taurine as a constitutional unit, a copolymer of hydroxyethyl acrylate and acryloyl dimethyl taurine salt, a copolymer of acrylate and acryloyl dimethyl taurine salt, acrylamide and acrylate And copolymers of acrylic acid, acrylamide, acrylate and acryloyldimethyl taurine, and copolymers of vinyl pyrrolidone and acryloyl dimethyl taurine, and the like.
More specifically, (Hydroxyethyl acrylate / Acryloyldimethyltaurine Na) copolymer, (Acrylic acid Na / Acryloyldimethyltaurine Na) copolymer, (Acrylamide / Ammonium acrylate) copolymer, and (Acrylic acid / Acryloyldimethyltaurine / dimethyl) Acrylamide) Crosspolymer, (Acryloyldimethyltaurine ammonium / vinyl pyrrolidone) copolymer, Acrylic acid / Acrylamide / Naacrylic acid / Acrylic acid Na / Acryloyldimethyltaurine Na copolymer, (Acryloyldimethyltaurine ammonium / Behenes methacrylate 25) Cross copolymer, (Acryloyl dimethyl Examples include taurine ammonium / steareth methacrylate-25) crosspolymer and the like.

  Examples of commercially available products of these components include SEPIGEL 501 (polyacrylamide, polysorbate 85, mineral oil, isoparaffin), SEPIGEL 305 (polyacrylamide, hydrogenated polyisobutene (or (C13, 14) isoparaffin), laureth) as polyacrylamide. 7. Water, as acrylamide-based copolymer, SEPINOV EMT 10 ((hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer), SIMULGEL NS ((hydroxyethyl acrylate / acryloyldimethyltaurine Na) copolymer, squalane, polysorbate 60, Water), SIMULGEL FL ((Hydroxyethyl acrylate / Acryloyldimethyltaurine Na) copolymer, isohexadecane, polysorbate 60, water), SEPIPLUS S ((Hydroxyethyl acrylate / acryloyl dimethyl tau) Phosphorus Na) copolymer, polyisobutene, PEG-7 trimethylolpropane coconut oil alkyl ether, water), SIMULGEL EG ((Na acrylate / Acryloyldimethyltaurine Na) copolymer, isohexadecane, polysorbate 80, water), SEPIPLUS 265 ((acrylamide) / Acrylate acrylate) copolymer, polyisobutene, polysorbate 20, water), SEPIPLUS 400 (acrylic acid / acrylamide / acrylic acid Na / acryloyldimethyltaurine Na) copolymer, polyisobutene, polysorbate 20, water), Aristflex AVC (acryloyl acryloyl taurine ammonium) / Vinyl pyrrolidone) copolymer), Aristflex HMB ((Acryloyl dimethyl taurine ammonium / Behenes 25 methacrylate) crosspolymer), Aristoflex HMS ((Acryloyl dimethyl taurine) Moniumu / methacrylic acid steareth -25) crosspolymer); the hydrophobically modified polyether polyurethane, Avalure flex-6 ((PEG-240 / decyltetradeceth -20 / HDI) copolymer, Trideceth -6) and the like.

  Among these, a copolymer of acrylic acid salt and acryloyl dimethyl taurate is preferably mentioned, and more preferably a (Na acrylate / Acryloyl dimethyl taurine) copolymer is mentioned.

  The content of the component (B) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and more preferably 0. 8 mass% or more is further more preferable. Moreover, 4 mass% or less is preferable, 3.5 mass% or less is more preferable, and 2.5 mass% or less is more preferable. 0.1-4 mass% is preferable, as for specific content, 0.5-4 mass% is more preferable, 0.8-3.5 mass% is more preferable, 0.8-2.5 mass% More preferable.

[(C) component: hydrophobized fine particle metal oxide powder]
The oil-in-water emulsion cosmetic of the present invention contains (C) hydrophobized fine particle metal oxide powder.
As the (C) hydrophobized fine particle metal oxide powder used in the present invention, one or more metal oxides selected from zinc oxide, titanium oxide and cerium oxide are preferred because they have a high effect of scattering ultraviolet light. It is preferable to use an object powder. In addition, these metal oxide powders can contain trace elements having a valence of +2 or more, and metals such as iron, zirconium, calcium, manganese, magnesium and yttrium can be used alone or in combination of two or more. It can be contained in particulate metal oxide powder.

  As fine particle zinc oxide powder, for example, FINEX-25, FINEX-50, FINEX-75 (manufactured by Sakai Chemical Industry Co., Ltd.), MZ500 series, MZ700 series (manufactured by Tayca Corporation), ZnO-350 (manufactured by Sumitomo Osaka Cement Co., Ltd.) And the like, and flaky zinc oxide powder described in Japanese Patent No. 3073887 is also mentioned. As fine particle titanium oxide powder, TTO-55 series, TTO-51 series (made by Ishihara Sangyo Co., Ltd.), JR series, JA series (made by Tayca Corporation) etc. are marketed. In addition, fine particle cerium oxide includes high purity cerium sold by Nikki or Seimi Chemical. Among these, it is preferable to use particulate zinc oxide powder or particulate titanium oxide powder.

  The average particle diameter of the fine particle metal oxide powder used in the present invention is preferably 0.01 μm or more, more preferably 0.012 μm or more, and still more preferably 0.015 μm or more from the viewpoint of preventing powder aggregation. In addition, from the viewpoint of preventing opacification of the preparation, 1 μm or less is preferable, 0.5 μm or less is more preferable, and 0.4 μm or less is more preferable. The specific average particle size is preferably 0.01 to 1 μm, more preferably 0.012 to 0.5 μm, and still more preferably 0.015 to 0.4 μm. The average particle size is measured by a laser diffraction / scattering method.

  Examples of the shape of the fine particle metal oxide powder used in the present invention include spheres, flakes, rods, spindles, needles, and irregular shapes, but any shape having an average particle diameter within the above range may be used. It can be used.

  The hydrophobizing treatment to the fine particle metal oxide powder is not particularly limited, and various surface treatments such as fluorine compound treatment, silicone treatment, pendant treatment, silane coupling agent treatment, titanium coupling agent treatment, oil agent treatment The surface treatment can be performed in advance by N-acylated lysine treatment, polyacrylic acid treatment, metal soap treatment, amino acid treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, silane compound, silazane compound or the like.

  For example, treatment with a surface treatment agent of silicone, treatment with a surface treatment agent of methylhydrogenpolysiloxane or methylhydrogenpolysiloxane / dimethylpolysiloxane copolymer of the following formula (1), silane compound or silazane compound Treatment with a surface treatment agent is preferably mentioned. Among them, preferably surface treatment using silicone, surface treatment using methyl hydrogen polysiloxane, surface treatment using silane compound or silazane compound, more preferably surface treatment using methyl hydrogen polysiloxane, silane compound or It is a surface treatment using a silazane compound.

(Wherein, m and n are integers, 1 ≦ m + n ≦ 60)

  As surface treatment using the silicone, as described in Japanese Patent No. 3187440, a metal oxide such as zinc oxide powder is a silicone compound comprising an organopolysiloxane and a silicone resin (except for a silane compound) The method of covering a metal oxide surface with silicon oxide by baking at a temperature of 600 to 950 ° C. in an oxygen-containing atmosphere after covering in a non-gas phase with at least one of

  The silane compound or silazane compound is preferably a silane compound or silazane compound having an alkyl group having 1 to 20 carbon atoms or a fluoroalkyl group and having reactivity with an inorganic oxide, and more specifically, the following general formula (2 Or a silazane compound represented by the general formula (3), which may be used alone or in combination of two or more.

RR ¹ _p SiX _3-p (2)
(P is an integer of 0 or 1, R represents an alkyl group having 1 to 20 carbon atoms or a fluoroalkyl group (which may be linear or branched), R ¹ represents ¹ carbon atom -6 alkyl group is shown, X is a halogen atom or a C1-C4 alkoxy group.)

R ² R ³ R ⁴ SiNHSi R ⁵ R ⁶ R ⁷ (3)
(R ^{2 to} R ⁷ each independently represent an alkyl group having 1 to 20 carbon atoms or a fluoroalkyl group (which may be linear or branched).)

  Specific examples of the silane compound include hexyltrimethoxysilane, octyltrimethoxysilane, decyltrimethoxysilane, octadecyltrimethoxysilane, octyltriethoxysilane, trifluoropropyltrimethoxysilane, heptadecafluorodecyltrimethoxysilane and the like. Be Among these, octyl triethoxysilane and octyl trimethoxysilane are particularly preferable. Preferred examples of the silazane compound include hexamethyldisilazane, octyldisilazane and the like, and among these, octyldisilazane is particularly preferable. The silane compounds or silazane compounds are characterized in that they can be easily treated uniformly, easily supplied, and inexpensive in cost, and further, (C) a particulate metal oxide powder surface-treated with these compounds. Is preferable because the characteristics such as dispersibility are excellent.

  As the treatment method with the silane compound or silazane compound, the silane compound or silazane compound and a metal oxide such as zinc oxide powder are mixed in an organic solvent such as n-hexane, cyclohexane or lower alcohol, and optionally pulverized After that, the organic solvent is removed by heating or reduced pressure, and preferably the silane compound or silazane compound is chemically reacted on the surface of the metal oxide such as zinc oxide by a method such as heat treatment at 80 to 250 ° C. There is a way to

  Further, as described in JP-A-2007-326902, there is also a method in which a cosmetic pigment is coated with a specific polysiloxane compound and then surface treatment with an alkylalkoxysilane in water is carried out.

  The amount of the surface treatment agent coated on the particulate metal oxide powder is preferably 3% by mass or more, more preferably 5% by mass or more, and preferably 15% by mass or less, based on the total amount of these powders used. % Or less is more preferable. The specific coverage is preferably 3 to 15% by mass, and more preferably 5 to 10% by mass. Within the range, the surface treatment agent is uniformly coated on the surface of these powders, and the surface treatment agent does not aggregate or precipitate on the surface of metal oxide powder such as zinc oxide.

  The content of the (C) hydrophobized fine particle metal oxide used in the present invention is preferably 8% by mass or more, more preferably 9% by mass or more, and still more preferably 10% by mass or more based on the total amount of the cosmetic. 25 mass% or less is preferable, 23 mass% or less is more preferable, and 20 mass% or less is more preferable. As a specific content, 8-25 mass% is preferable, 9-23 mass% is more preferable, 10-20 mass% is further more preferable. Within the above range, the dispersibility of the powder is good, and the problem of an increase in viscosity of the preparation does not occur.

  (C) Containing 60% by mass or more of hydrophobized zinc oxide powder in hydrophobized microparticulated metal oxide as hydrophobized microparticulated metal oxide leads to the improvement of UVA protection ability and the improvement of high temperature stability. preferable.

  In the present invention, the content mass ratio (C / A) of the component (C) to the component (A) is 0.4 or more and 1.0 or more in order to improve the friction resistance and obtain good stability over time. It is necessary to do the following. The content mass ratio of the component (C) to the component (A) may be 0.4 or more and 1.0 or less, preferably 0.5 or more, more preferably 0.6 or more, and 0.7 or more. Furthermore, 0.98 or less is preferable, 0.95 or less is more preferable, and 0.93 or less is more preferable. Specifically, 0.5 to 1.0 is preferable, 0.6 to 1.0 is more preferable, 0.6 to 0.97 is more preferable, 0.6 to 0.95 is more preferable, 0.6 Further preferred is 0.93.

  The oil-in-water emulsion cosmetic of the present invention preferably contains a water-soluble polymer other than the component (B) as the component (D) from the viewpoint of enhancing the feeling in use and the temporal stability. As water-soluble polymers other than the component (D) and (B), xanthan gum is preferable. 0.01 mass% or more is preferable with respect to cosmetics total amount, 0.05 mass% or more is preferable, 5 mass% or less is preferable, and its 1 mass% or less is more preferable. The specific content is preferably 0.01 to 5% by mass, more preferably 0.05 to 1% by mass.

  The oil-in-water emulsion cosmetic of the present invention contains (E) a saturated monohydric alcohol having 1 to 3 carbon atoms, which enhances the good elongation at the time of application, suppresses stickiness, temporal stability, water resistance It is preferable from the viewpoint of enhancing sweat resistance. (E) Examples of the saturated monohydric alcohol having 1 to 3 carbon atoms include ethyl alcohol, propyl alcohol and isopropyl alcohol. These C1-C3 saturated monohydric alcohols can be used combining 1 type, or 2 or more types suitably.

  The content of the component (E) of the present invention is not particularly limited, but from the viewpoint of enhancing the elongation at the time of application, suppressing the stickiness, and improving the temporal stability, water resistance, and sweat resistance, 3 mass% or more is preferable, 4 mass% or more is more preferable, 6 mass% or more is more preferable, 20 mass% or less is preferable, 15 mass% or less is more preferable, and 12 mass% or less More preferable. As a specific content, 3-20 mass% is preferable, More preferably, it is 4-15 mass%, More preferably, it is 6-12 mass%.

  In the oil-in-water type emulsified cosmetic of the present invention, it is preferable to contain (F) a polyhydric alcohol from the viewpoint of enhancing the moisture retention and the elongation at the time of application. As the component (F), for example, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol (average molecular weight less than 650), propylene glycol, dipropylene glycol, polypropylene glycol (average molecular weight less than 650), isoprene glycol, 1,3- Glycols such as butylene glycol; glycerin, diglycerin, polyglycerin. Among these, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol and glycerin can be suitably used, and more preferably dipropylene glycol, 1,3-butylene glycol and glycerin. These polyhydric alcohols may be used alone or in combination of two or more.

  The content of the component (F) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, based on the total amount of the cosmetic composition, from the viewpoint of enhancing the moisturizing property and the elongation at the time of application. % By mass or more is more preferable, 30% by mass or less is preferable, 20% by mass or less is more preferable, 15% by mass or less is more preferable, and 10% by mass or less is more preferable. As a specific content, 0.1-30 mass% is preferable, 0.5-20 mass% is more preferable, 0.5-15 mass% is more preferable, 1-15 mass% is more preferable, 1 -10 mass% is further more preferable.

  A surfactant can be contained in the oil-in-water emulsion cosmetic of the present invention for the purpose of adjusting the feeling in use and the temporal stability. The surfactant is not particularly limited, and may be nonionic surfactant, anionic surfactant, cationic surfactant, amphoteric surfactant, natural surfactant, polyether modified silicone, siloxane derivative, etc. Any of a silicone-containing surfactant, a surfactant containing a perfluoroalkyl group, and the like can be used, and one or more of these can be used.

  Among these surfactants, nonionic surfactants, polyether-modified silicones, and silicone-containing surfactants are preferable. Specifically, sorbitan monoisostearate, dimethicone copolyol, polyoxyethylene hydrogenated castor oil (EO (EO) Average addition mole number 60), polyoxyethylene hydrogenated castor oil (EO average addition mole number 40), polyoxyethylene castor oil (EO average addition mole number 40), polyoxyethylene sorbitan monolaurate (EO average addition mole number 20) Polyoxyethylene monostearate (EO average added mole number 20), polyoxyethylene sorbitan oleate (EO average added mole number 20), polyoxyethylene (EO average added mole number 7) lauryl ether, polyoxyethylene (EO Average added mole number 7) Trimethylolp Pan'yashi oil alkyl ether and the like.

  In the oil-in-water emulsion cosmetic of the present invention, the feeling of use and the stability over time are good without using the above-mentioned surfactant, and when a large amount of the surfactant is blended, a sticky feeling derived from the surfactant occurs. The amount of the surfactant added is preferably 3% by mass or less, more preferably 1% by mass or less, and still more preferably 0.1% by mass or less based on the total amount of the cosmetic. When described as a specific range, 0 to 3% by mass is preferable, 0 to 1% by mass is more preferable, and 0 to 0.5% by mass is more preferable.

The oil-in-water emulsion cosmetic of the present invention may contain an emulsifier for the purpose of adjusting the feeling in use and the temporal stability. As an emulsifier, dextrin palmitate, Behnes-2 etc. are mentioned.
3 mass% or less is preferable with respect to the cosmetics total amount, as for the compounding quantity of an emulsifier, 2 mass% or less is more preferable, and 1 mass% or less is still more preferable. If it describes as a specific range, 0-3 mass% is preferable, 0-2 mass% is more preferable, 0-1 mass% is further more preferable.

  In the oil-in-water emulsion cosmetic of the present invention, the content of water is 40% by mass or more based on the total amount of the oil-in-water emulsion cosmetic, from the viewpoint of forming an oil-in-water emulsion composition excellent in temporal stability. Is preferable, 45 mass% or more is more preferable, 75 mass% or less is preferable, and 70 mass% or less is more preferable. Specifically, it is preferably 40 to 75% by mass, more preferably 45 to 70% by mass.

  Further, in the oil-in-water emulsion cosmetic of the present invention, in addition to the above components, higher alcohols, fatty acids, esters, sterols, sterol fatty acids may be used according to the purpose without impairing the effects of the present invention. Esters, hydrocarbons, oils and fats, silicone oils, moisturizers, plant extracts, vitamins, antioxidants, antiseptics, anti-inflammatory agents, insect repellents, physiologically active ingredients, salts, chelating agents, neutralizers , PH adjusters, perfumes, etc. can be blended.

The oil-in-water emulsion cosmetic of the present invention can be suitably used as a hair cosmetic such as a shampoo, a rinse and a conditioner, a facial cleanser, a cleansing cosmetic, a sunscreen cosmetic, a pack and a massage cosmetic. Among these, it is particularly preferable to apply to sunscreen cosmetics (such as lotions, creams, milky lotions, cosmetic liquids, etc.), suntans, cosmetic base cosmetics, foundations having UV protection ability, and the like.
The dosage form of the oil-in-water emulsified cosmetic of the present invention can be applied to liquid, emulsion, cream, paste, solid, multilayer and the like, and further as a sheet agent, spray agent and mousse agent. Applicable

  Regarding the above-mentioned embodiment, the present invention further discloses the following embodiments.

[1] An oil-in-water emulsion cosmetic comprising the following components (A) to (C),
(A) Liquid oil containing oil-soluble organic UV absorber (B) Salt-tolerant water-soluble polymer (C) Hydrophobized fine particle metal oxide powder (A) Component having an IOB value of 0.10 or more in component 40 Containing by mass% or more, containing 3% by mass or more and 30% by mass or less of the component (A) in the total cosmetic, the content mass ratio (C / A) of the component (C) to the component (A) is 0.4 or more An oil-in-water emulsified cosmetic which is 1.0 or less.
[2] The oil-in-water emulsified cosmetic according to [1], wherein the component (A) is preferably one or more selected from a liquid organic UV absorber and a solid organic UV absorber. .
[3] The liquid organic UV absorber is preferably one or more selected from 2-ethylhexyl paramethoxycinnamate, 2-ethylhexyl salicylate, homomenthyl salicylate, octocrylene, and dimethyldiethylbenzalmalonate. The oil-in-water emulsion cosmetic according to [1] or [2], which contains it.
[4] The solid organic UV absorber is preferably 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4-bis {[4- (2-ethylhexyloxy) -2 -Hydroxy] phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine And one or more selected from 4-tert-butyl-4'-methoxydibenzoylmethane, more preferably 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4- Bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine, And any one of [1] to [3], containing one or more selected from 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine An oil-in-water emulsion cosmetic composition as described in Crab.
[5] As oil agents other than the organic ultraviolet absorber contained in the component (A), preferably isopropyl palmitate, isocetyl myristate, cetyl 2-ethylhexanoate, glyceryl tri 2-ethylhexanoate, tri (capryl) Capric acid) glyceryl, triethylhexanoin, isononyl isononanoate, diisopropyl sebacate, propylene glycol isostearate, alkyl benzoate C12-15, 2-ethylhexyl paramethoxycinnamate, more preferably isopropyl palmitate, triethyl ester Hexanoin, Isononyl isononanoate, Diisopropyl sebacate, Alkyl benzoate C12-15 Isopropyl palmitate, Isocetyl Myristate, Cetyl 2-ethylhexanoate, Tri 2-ethyl hexane Glyceryl, tri (capryl caprylic acid) glyceryl, triethylhexanoin, isononyl isononanoate, diisopropyl sebacate, propylene glycol isostearate, alkyl benzoate C12-15, one or more selected from palmitic acid, more preferably palmitic acid The oil-in-water type emulsion according to any one of [1] to [4], containing one or more selected from isopropyl, triethylhexanoin, isononyl isononanoate, diisopropyl sebacate, and alkyl benzoate C12-15. Cosmetics.
[6] The component (A) preferably contains 40 mass% or more of a component having an IOB value of 0.10 to 0.60, more preferably an IOB value of 0.10 to 0.40, [1] ] The oil-in-water type emulsion cosmetic according to any one of [5].
[7] The content ratio of the component having an IOB value of 0.10 or more contained in the component (A) is 40% by mass or more, preferably 60% by mass or more, more preferably 80% by mass or more, further preferably 90 The oil-in-water type emulsion cosmetic according to any one of [1] to [6], which is mass% or more, more preferably 95 mass% or more, and preferably 100 mass% or less.
[8] The content ratio of the component having an IOB value of 0.10 or more contained in the component (A) is preferably 40 to 100% by mass, more preferably 60 to 100% by mass, still more preferably 80 to 100% The oil-in-water type emulsion cosmetic according to any one of [1] to [7], which is preferably 90 to 100% by mass, more preferably 95 to 100% by mass.
[9] The content ratio of the component having an IOB value of 0.10 to 0.60 contained in the component (A) is preferably 40% by mass or more, more preferably 50% by mass or more, still more preferably 65% % Or more, preferably 100% by mass or less, more preferably 99% by mass or less, still more preferably 95% by mass or less, [1] to [8] .
[10] The content ratio of the component having an IOB value of 0.10 to 0.60 contained in the component (A) is preferably 40 to 100% by mass, more preferably 50 to 99% by mass, still more preferably The oil-in-water type emulsion cosmetic according to any one of [1] to [9], which is 65 to 95% by mass.
[11] The content of the component (A) with respect to the total amount of the cosmetic is preferably 5% by mass or more, more preferably 10% by mass or more, more preferably 15% by mass or more, preferably 25% by mass or less, more preferably The oil-in-water type emulsion cosmetic according to any one of [1] to [10], wherein
[12] The content of the component (A) is preferably 5 to 25% by mass, more preferably 10 to 20% by mass, and still more preferably 15 to 20% by mass, based on the total amount of the cosmetic. The oil-in-water type emulsion cosmetic according to any one of 11).
[13] The content of the oil-soluble organic UV absorber relative to the component (A) is preferably 30% by mass or more, more preferably 40% by mass or more, still more preferably 50% by mass or more, and preferably 80% by mass. The oil-in-water type emulsified cosmetic according to any one of [1] to [12], which is preferably 75% by mass or less, more preferably 70% by mass or less.
[14] The content of the oil-soluble organic ultraviolet absorber relative to the component (A) is preferably 30 to 80% by mass, more preferably 40 to 75% by mass, and still more preferably 50 to 70% by mass [1 ] The oil-in-water type emulsion cosmetic according to any one of [13].
[15] The content of the liquid organic ultraviolet absorber relative to the component (A) is preferably 15% by mass or more, more preferably 25% by mass or more, still more preferably 35% by mass or more, and preferably 60% by mass or less The oil-in-water type emulsion cosmetic according to any one of [1] to [14], which is more preferably 55% by mass or less, still more preferably 50% by mass or less.
[16] The content of the liquid organic ultraviolet absorber relative to the component (A) is preferably 15 to 60% by mass, more preferably 25 to 55% by mass, and still more preferably 35 to 50% by mass, [1] The oil-in-water type emulsion cosmetic according to any one of [15].
[17] The content of the solid organic UV absorber relative to the component (A) is preferably 10% by mass or more, more preferably 12% by mass or more, still more preferably 15% by mass or more, and preferably 35% by mass or less The oil-in-water type emulsion cosmetic according to any one of [1] to [16], which is more preferably 30% by mass or less, still more preferably 25% by mass or less.
[18] The content of the solid organic UV absorber relative to the component (A) is preferably 10 to 35% by mass, more preferably 12 to 30% by mass, and still more preferably 15 to 25% by mass [1 ] The oil-in-water type emulsified cosmetic according to any one of [17].
[19] The content of the solid organic UV absorber relative to the total amount of the oil-soluble organic UV absorber is preferably 10% by mass or more, more preferably 20% by mass or more, still more preferably 25% by mass or more, and preferably The oil-in-water type emulsified cosmetic according to any one of [1] to [18], which is 60% by mass or less, more preferably 50% by mass or less, still more preferably 40% by mass or less.
[20] The content of the solid organic UV absorber relative to the total amount of the oil-soluble organic UV absorber is preferably 10 to 60% by mass, more preferably 20 to 50% by mass, still more preferably 25 to 40% by mass The oil-in-water type emulsion cosmetic according to any one of [1] to [19].
[21] The component (B) preferably contains a copolymer of acrylate and acryloyldimethyl taurate, more preferably (Na acrylate / Acryloyl dimethyl taurine) copolymer, [1] to [1] 20. The oil-in-water emulsion cosmetic according to any of 20.
[22] The content of the component (B) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, still more preferably 0.8% by mass or more, based on the total amount of the cosmetic. The oil-in-water type emulsified cosmetic according to any one of [1] to [21], which is preferably 4% by mass or less, more preferably 3.5% by mass or less, still more preferably 2.5% by mass or less.
[23] The content of the component (B) is preferably 0.1 to 4% by mass, more preferably 0.5 to 4% by mass, and still more preferably 0.8 to 3%, based on the total amount of the cosmetic. The oil-in-water type emulsified cosmetic according to any one of [1] to [22], which is 5% by mass, more preferably 0.8 to 2.5% by mass.
[24] Any one of [1] to [23], wherein the component (C) contains at least one metal oxide powder preferably selected from zinc oxide, titanium oxide and cerium oxide The oil-in-water emulsion cosmetic according to the above.

  Hereinafter, the present invention will be described in detail by way of Examples and Comparative Examples, but the present invention is not limited thereto.

Examples 1-14, Comparative Examples 1-4
An oil-in-water emulsified cosmetic was prepared according to the formulation shown in Table 1 by a conventional method. Using these, (1) UV protection ability, (2) water resistance, (3) stability over time, (4) feeling in use, and (5) friction resistance shown below were evaluated. The results are shown in Table 1.

(1) Ultraviolet Protective Ability The ultraviolet protective ability was evaluated by the following in vitro SPF measurement.
Each sample of the oil-in-water emulsion cosmetic shown in Table 1 was uniformly coated on a quartz glass plate to a concentration of 2 mg / cm ² for 1 minute and dried in a cool and dark place for 15 minutes. After drying, the absorption spectrum (wavelength 350 nm) of the SPF analyzer (SPF 290S plus, manufactured by Optometricus USA), a total of nine locations on the square quartz glass plate, the middle point, each vertex, and the middle point of the side connecting each vertex The transmittance (%) of) was measured, and the average of nine places was determined. The result showed the SPF value (-) obtained from the transmittance (%). (N = 3)
The ultraviolet protection ability was evaluated by the following criteria.

〔Evaluation criteria〕
A: SPF value is higher than 50 B: SPF value is 40 to 50 C: SPF value is 20 to 40 D: SPF value is lower than 20

(2) Water resistance Each sample of the oil-in-water type emulsified cosmetic shown in Table 1 was uniformly coated on a quartz glass plate so as to be ² mg / cm ² and naturally dried for 15 minutes. Thereafter, the sample-coated quartz glass plate was irradiated with ultraviolet light from a certain distance (10 mm). The transmitted ultraviolet light at that time was detected with a SPF analyzer (SPF 290S plus, manufactured by Optometricus USA) at six or more locations on the quartz glass plate in the range of 290 to 400 nm, and an averaged spectrum was obtained to calculate the SPF value. .
Thereafter, it was immersed in a water bath at 20 ° C. so that the coated surface together with the sample-coated quartz glass plate was on top, and light agitation was continued for 15 minutes while maintaining the water temperature at 20 ° C. Thereafter, the quartz glass plate was slowly taken out and allowed to dry for 30 minutes or more. After repeating this work twice, the SPF value was determined again by the same method, and the SPF value residual ratio before and after the water immersion treatment was calculated.

[Water resistance evaluation]
The water resistance was determined based on the following criteria from the SPF value residual ratio before and after the water immersion treatment.
SPF residual ratio (%) = (SPF value measured after immersing a sample-coated quartz glass plate in a water bath) / (SPF value measured before immersing a sample-coated quartz glass plate in a water bath) × 100
〔Evaluation criteria〕
A: SPF residual rate of 90% or more B: SPF residual rate of 70% to less than 90% C: SPF residual rate of 50% to less than 70% D: SPF residual rate of less than 50%

(3) Aging Stability The oil-in-water emulsified cosmetic shown in Table 1 was stored at 60 ° C. for one month, and then the appearance was visually evaluated.
[Criteria for judging viscosity change]
A: No change or slight viscosity change observed B: Clear viscosity change observed C: Separated

(4) Feeling of Use The oil-in-water emulsified cosmetic shown in Table 1 was used by five expert panelists. At 25 ° C, 57 RH%, 0.02 mL of each cosmetic was applied to a circle with a diameter of 3 cm on the inner side of the forearm, and it was spread for 1 minute as “feeling of squeakiness at the time of application”, “application The following evaluations were made in steps of 0.1, with 5 being preferred and 1 being non-sticky, respectively, and the average score of 5 persons was determined. Evaluation and judgment were made based on the following evaluation criteria and judgment criteria. 〔Evaluation criteria〕
5: Preferred 4: Slightly preferred 3: Neither can be said 2: Slightly undesirable 1: Unfavorable [criteria]
A: Average score is 4.5 or more B: Average score is 3.0 or more and less than 4.5 C: Average score is 1.5 or more and less than 3.0 D: Average score is less than 1.5

(5) Friction Resistance A sample of the oil-in-water emulsion cosmetic shown in Table 1 was applied to a quartz glass plate and dried in the same manner as in the above (1) UV protection performance evaluation method. Thereafter, friction was applied by using a friction tester (Tripomaster, manufactured by Trinity Lab Co., Ltd.) (weight: 20 g, 10 reciprocations). With respect to the quartz glass plate after the friction load, the SPF value was obtained again by the same method, and the SPF value residual ratio before and after the friction load was calculated.
[Abrasion resistance evaluation]
From the respective SPF values before and after the frictional load, it was judged according to the following criteria.
Friction resistance evaluation (%) = (SPF value measured after rubbing sample-coated quartz glass plate) / (SPF value measured before sample-coated quartz glass plate) × 100
〔Evaluation criteria〕
A: 70% or more B: 50% or more and less than 70% C: 30% or more and less than 50% D: less than 30%

Details of the components used in Table 1 are shown below.
* 1: Parsol 1789: 4-tert-butyl-4'-methoxydibenzoylmethane (manufactured by DSM)
* 2: Yubinal MC80: 2-ethylhexyl paramethoxycinnamate (manufactured by BASF)
* 3: Yubinal Aplus: 2- (4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester (manufactured by BASF)
* 4: Uvinal T-150: 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine (manufactured by BASF)
* 5: TINOSORB S: 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine (manufactured by BASF)
* 6: Sepigel 501: polyacrylamide, polysorbate 85, mineral oil, isoparaffin; containing 20% by mass of polyacrylamide (manufactured by SEPPIC)
* 7: Shimalgel EG: sodium acrylate / sodium acryloyldimethyl taurate copolymer (SEPPIC)
* 8: Aristflex AVC: (Acryloyldimethyltaurine ammonium / vinyl pyrrolidone) copolymer (manufactured by Clariant)
* 9: Avalure flex-6: (PEG-240 / decyltetradeceth-20 / HDI) copolymer, trideceth-6 (manufactured by Lubrizol)
* 10: Pemulen TR-1: acrylic acid / methacrylic acid alkyl copolymer (Lubrizol Advanced Materials)

  The hydrophobized fine particle metal oxide powder used in this example, comparative example and formulation example was as follows.

(Production example 1 Production of methylhydrogenpolysiloxane surface-treated fine particle titanium oxide powder)
A slurry consisting of 95 parts by mass of fine particle titanium oxide powder (approximately spherical shape, average particle diameter of 0.017 μm), 5 parts by mass of methyl hydrogen polysiloxane (KF-99P, Shin-Etsu Chemical Co., Ltd.) and isopropyl alcohol is prepared and stirred well. After grinding, the solvent was removed by heating under reduced pressure, and heat treatment was performed in air at 160 ° C. for 4 hours to obtain methylhydrogenpolysiloxane surface-treated fine particle titanium oxide powder.

(Production example 2 Production of octyl triethoxysilane surface-treated fine particle zinc oxide powder)
A slurry consisting of 93 parts by mass of fine-grained zinc oxide powder (approximately spherical shape, average particle size of 0.02 μm) and 7 parts by mass of octyltriethoxysilane and toluene is prepared and ground using a bead mill (Dinomill manufactured by Shinmaru Enterprises Co., Ltd.)・ Crushed. Then, after toluene was distilled off by heating under reduced pressure, heat treatment was carried out at 150 ° C. for 4 hours using an air-flow type drier to obtain octyl triethoxysilane surface-treated fine particle zinc oxide powder.

(Production example 3 Production of methylhydrogenpolysiloxane surface-treated fine particle zinc oxide powder)
A slurry consisting of 93 parts by mass of fine-grained zinc oxide powder (approximately spherical shape, average particle size of 0.02 μm), 7 parts by mass of methyl hydrogen polysiloxane (KF-99P, Shin-Etsu Chemical Co., Ltd.) and isopropyl alcohol After grinding, the solvent was removed by heating under reduced pressure, and heat treatment was performed in air at 150 ° C. for 4 hours to obtain methylhydrogenpolysiloxane surface-treated fine particle zinc oxide powder.

  From the results of Table 1, the oil-in-water emulsion cosmetic according to the example of the present invention is excellent in UV protection ability, water resistance, temporal stability, and feeling in use, as compared with the oil-in-water emulsion cosmetic according to the comparative example. Furthermore, it is clear that it is also excellent in friction resistance.

Hereinafter, formulation examples of the oil-in-water emulsion cosmetic of the present invention will be described.
Example 15 (Sunscreen)
An oil-in-water emulsion cosmetic (sunscreen) having the following composition was prepared and evaluated, and it was excellent in all points of the ultraviolet light protective effect, water resistance, feeling in use, temporal stability, and abrasion resistance.
(Composition ingredient) (mass%)
1. Isononyl isononanoate 1.5
2. Triethylhexanoin 2.0
3. Isopropyl palmitate 2.0
4. Dimethicone (6cs) 2.0
5. Yuvenard MC 80 7.0
6. (Acrylate Na / Acryloyldimethyltaurine) Copolymer (SIMULGEL EG, manufactured by SEPPIC) 2.2
7. Octyltriethoxysilane surface-treated fine particle zinc oxide powder (Production Example 2)
12
8. Uvinard T150 1.5
9. Tinosorb S 2.0
10. Yuvenard Aplus 0.5
11. Xanthan gum 0.1
12. 1,3-Butylene glycol 2.0
13. Ethanol 10.0
14. Glycerin 2.0
15. Edetate disodium 0.01
16. Fragrance 0.05
17. Refined water balance

Example 16 (Body for makeup)
When the oil-in-water type emulsion cosmetic (cosmetic base) having the following composition was prepared and evaluated, it was excellent in all points of the ultraviolet light protective effect, water resistance, feeling in use, stability over time and abrasion resistance.
(Composition ingredient) (mass%)
1. Isononyl isononanoate 1.5
2. Triethylhexanoin 2.0
3. Isopropyl palmitate 1.0
4. Dimethicone (6cs) 1.0
5. Yuvenard MC 80 7.0
6. (Acrylate Na / Acryloyldimethyltaurine) Copolymer (SIMULGEL EG, manufactured by SEPPIC) 2.2
7. Methylhydrogenpolysiloxane surface-treated fine particle titanium oxide powder (Production Example 1)
5.0
8. Octyltriethoxysilane surface treatment pigment titanium oxide powder 8.0
9. Uvinard T150 1.5
10. Tinosorb S 1.5
11. Yuvenard Aplus 1.0
12. Phospholipid 1.0
13. Behenyl alcohol 1.0
14. Xanthan gum 0.1
15. 1,3-butylene glycol 2.0
16. Ethanol 7.0
17. Glycerin 2.0
18. Edetate disodium 0.01
19. Fragrance 0.05
20. Refined water balance

Claims (8)

An oil-in-water emulsified cosmetic comprising the following components (A) to (C):
(A) Liquid oil containing oil-soluble organic UV absorber (B) Salt-tolerant water-soluble polymer (C) Hydrophobized fine particle metal oxide powder (A) Component having an IOB value of 0.10 or more in component 40 Containing by mass% or more, containing 3% by mass or more and 30% by mass or less of the component (A) in the total cosmetic, the content mass ratio (C / A) of the component (C) to the component (A) is 0.4 or more An oil-in-water emulsified cosmetic which is 1.0 or less.   The oil-in-water emulsion cosmetic according to claim 1, wherein the component (A) contains 40% by mass or more of a component having an IOB value of 0.10 or more and 0.60 or less.   The oil-in-water type emulsified cosmetic according to claim 1 or 2, wherein a content mass ratio (C / A) of the component (C) to the component (A) is 0.6 or more and 1.0 or less.   2- (4-Diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4-bis {[4- (2-ethylhexyloxy)] as an oil-soluble organic ultraviolet light absorber contained in the component (A) -2-hydroxy] phenyl} -6- (4-methoxyphenyl) -1,3,5-triazine, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5 Organic UV absorber solid at 25 ° C. selected from the group consisting of -triazine, 4-tert-butyl-4'-methoxydibenzoylmethane, and 2-ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate The oil-in-water emulsion cosmetic according to any one of claims 1 to 3, which comprises   The oil-in-water type emulsion cosmetic according to claim 4, wherein the content of the solid organic ultraviolet absorber relative to the component (A) is 10% by mass or more and 35% by mass or less.   The oil-in-water type emulsified cosmetic according to any one of claims 1 to 5, wherein the component (B) is at least one selected from the group consisting of polyacrylamide, acrylamide copolymers, and hydrophobically modified polyether polyurethane. .   The hydrophobizing treatment of the component (C) is at least one surface treatment selected from the group consisting of surface treatment using methyl hydrogen polysiloxane and surface treatment using a silane compound or a silazane compound. The oil-in-water emulsion cosmetic according to any one of -6.   The oil-in-water emulsion cosmetic according to any one of claims 1 to 7, which is used for sunscreen use.