JP7015644B2 - Underwater oil type emulsified cosmetic - Google Patents

Description

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

Sunscreen cosmetics are intended to block ultraviolet rays in the sun's rays and protect the skin from the adverse effects of ultraviolet rays, and their bases include emulsification type, lotion type, oil type, etc., and as emulsification type. Is roughly classified into oil-in-water emulsified cosmetics having an aqueous component as an outer phase (continuous phase) and water-in-oil emulsified cosmetics having an oily component as an outer phase (continuous phase). Conventionally, sunscreen cosmetics have been required to have a fresh feeling of use, and among the oil-in-water emulsified cosmetics, the oil-in-water emulsified cosmetics obtained by emulsifying a hydrophobically treated ultraviolet scattering agent suppress stickiness. Therefore, it is possible to realize a fresh feeling of use (for example, Patent Document 1).

On the other hand, in order to block the irradiation of ultraviolet rays to the skin and obtain a high SPF (Sun Protection Factor) value, it is necessary to add a high amount of a solid ultraviolet absorber or an ultraviolet scattering agent to the sunscreen cosmetics. In order to add a solid ultraviolet absorber or an ultraviolet scattering agent, it is necessary to add a high amount of oil, but if the amount of oil is high, stickiness cannot be suppressed.

Although the emulsification type is different, in Patent Document 2, a high SPF value is achieved without adding an ultraviolet scattering agent by adding a dextrin fatty acid ester and / or a sucrose fatty acid ester to the oil in Patent Document 2. It is stated that it is possible to reduce oiliness and stickiness.

Japanese Unexamined Patent Publication No. 2014-101335 Japanese Unexamined Patent Publication No. 2011-126832

It is necessary to reduce the oil content in order to achieve freshness and good elongation, but ester oil must be added as an essential component at least for the dissolution of solid UV absorbers and the formulation of UV scattering agents. However, if this is done, the ratio of the ester oil in the total amount of oil will be high, and thus the stickiness peculiar to the ester oil will occur. As described above, in the case of oil-in-water emulsified cosmetics, there is an antinomy between the freshness and smoothness required for usability and the realization of a high SPF value required as the original function of sunscreen cosmetics. In the past, a powder that improves usability was added to the aqueous phase to give a silky feel, but there was a problem that powder squeaks occurred when applied to the skin. In addition, since emulsification tends to be unstable in an emulsified system in which a hydrophobized powder is blended in the internal phase (oil phase), a fatty acid ester as described in Patent Document 2 is used in the oil phase. When blended, the emulsified particles are destroyed, and it is difficult to obtain a sufficiently stable base.

The present invention has been made in view of the above circumstances, and is required for an oil-in-water emulsified cosmetic by blending a predetermined amount of solid oil and / or semi-solid oil and keeping the total amount of the oil phase below a certain level. It is an object of the present invention to provide an oil-in-water emulsified cosmetic that can suppress stickiness and achieve a high SPF value while maintaining a feeling of freshness and smoothness in use.

The oil-in-water emulsified cosmetic of the present invention is an oil-in-water emulsified cosmetic containing solid oil and / or semi-solid oil, powder, and an emulsifier.
The solid oil and / or the semi-solid oil is at least one selected from hydrocarbon oils, silicone oils and ester oils, has a viscosity at 25 ° C. of 1500 mPa · s or less, and is blended in an amount relative to the total amount of the oil phase. 2 to 25% by mass,
The oil phase is 40% by mass or less of the total amount of cosmetics,
The powder is a fine particle powder that has been hydrophobized.

The solid oil and / or semi-solid oil is preferably a sucrose fatty acid ester.
The fatty acid of the sucrose fatty acid ester is preferably linear or branched chain having 12 to 22 carbon atoms.

The solid oil and / or semi-solid oil is preferably an alkylmethylsiloxane wax.

The emulsifier is preferably an amphipathic polymer polymer.
The emulsifier is preferably an alkyl-modified polysaccharide.
The emulsifier is preferably hydrophobically modified alkyl cellulose.

The blending amount of the solid oil and / or the semi-solid oil is preferably 0.5 to 5% by mass with respect to the total amount of the cosmetic.
The ratio of the blending amount of the emulsifier to the blending amount of the solid oil and / or the semi-solid oil is preferably 0.04 to 0.4.

The blending amount of the powder is preferably 3 to 10% by mass with respect to the total amount of the cosmetic.

It further comprises a thickener, and the thickener is preferably at least one selected from polyacrylamide compounds, anionic polymers and polysaccharides.
The thickeners are (dimethylacrylamide / acryloyldimethyltaurine sodium) crosspolymer, vinylpyrrolidone / 2-acrylamide-2-methylpropanesulfonic acid (salt) copolymer, sodium acrylate / 2-acrylamide-2-methylpropanesulfon. Acid (salt) copolymer, acrylamide / 2-acrylamide-2-methylpropanesulfonic acid sodium salt copolymer, acrylamide / 2-acrylamide-2-methylpropanesulfonic acid (salt), 2-acrylamide-2-methylpropane It is preferably at least one selected from a homopolymer of a sodium sulfonic acid salt, dimethylacrylamide / 2-acrylamide-2-methylpropanesulfonic acid, a carboxyvinyl polymer, and xanthan gum.

The oil phase preferably contains an ultraviolet absorber.

The oil-in-water emulsified cosmetic of the present invention is an oil-in-water emulsified cosmetic containing a solid oil and / or a semi-solid oil, a powder, and an emulsifier, and the solid oil and / or the semi-solid oil is a hydrocarbon. At least one selected from oil, silicone oil and ester oil, the viscosity at 25 ° C. is 1500 mPa · s or less, the blending amount is 2 to 25% by mass with respect to the total amount of the oil phase, and the oil phase is Since the powder is a fine particle powder that has been hydrophobized at 40% by mass or less with respect to the total amount of cosmetics, it has a high SPF value while maintaining the freshness and good spreadability required for oil-in-water emulsified cosmetics. It is possible to suppress stickiness as a prescription that can realize.

Hereinafter, the oil-in-water emulsified cosmetic of the present invention will be described in detail.
The oil-in-water emulsified cosmetic of the present invention is an oil-in-water emulsified cosmetic containing a solid oil and / or a semi-solid oil, a powder, and an emulsifier, and the solid oil and / or the semi-solid oil is a hydrocarbon. At least one selected from oil, silicone oil and ester oil, the viscosity at 25 ° C. is 1500 mPa · s or less, the blending amount is 2 to 25% by mass with respect to the total amount of the oil phase, and the oil phase is It is a fine particle powder in which the powder is hydrophobized in an amount of 40% by mass or less based on the total amount of cosmetics.
Hereinafter, each component will be described in detail.

<Solid oil and / or semi-solid oil>
The solid oil and / or the semi-solid oil has a viscosity at 25 ° C. of 1500 mPa · s or less, more preferably 1000 mPa · s or less, and further preferably 500 mPa · s or less. Here, the viscosity is a value measured by a B-type viscometer at 25 ° C., and more specifically, a VDA-type viscometer (DIGITAL VISMETRON VDA, Shibaura System Co., Ltd.), Rotor No. 1. Rotor No. 2 or rotor No. 3 can be used, and it is a value measured under the condition of a rotation speed of 12 rpm and 1 minute.

Here, the solid oil means a solid oil at 25 ° C., and the semi-solid oil means an oil whose half amount is solid at 25 ° C.
The melting point (mp) of the solid oil and / or the semi-solid oil is preferably in the range of 44 ° C to 90 ° C. When the melting point is in this range, it is possible to obtain a feeling of use that is not sticky after coating.

The solid oil and / or semi-solid oil of the present invention is at least one selected from hydrocarbon oils, silicone oils and ester oils.
Examples of the hydrocarbon oil include microcrystalline wax and synthetic hydrocarbon wax, and microcrystalline wax can be preferably used from the viewpoint of usability and high SPF.

As the silicone oil, alkylmethylsiloxane wax can be used.
As the ester oil, for example, hydrogenated oil, sucrose fatty acid ester, myristyl myristate (Cloder Japan Co., Ltd.) and the like can be preferably used. Examples of the hydrogenated oil (a type of processed fat) include white solid fat obtained by addition-reacting hydrogen to fish oil, whale oil, rapeseed oil, soybean oil and the like. As a commercially available product, for example, "Trifat PS-45H" (Nikko Chemicals Co., Ltd.) and the like can be preferably mentioned.
From the viewpoint of emulsion stability and versatility, sucrose fatty acid ester and alkylmethylsiloxane wax are particularly preferable.

As the sucrose fatty acid ester, those in which the fatty acid is linear or branched, saturated or unsaturated, and has 12 to 22 carbon atoms can be preferably used. Specifically, sucrose caprylic acid ester, sucrose capric acid ester, sucrose lauric acid ester, sucrose myristic acid ester, sucrose palmitate ester, sucrose stearate ester, sucrose oleic acid ester, sucrose elca. Examples thereof include acid esters, and these can be used alone or in combination of two or more. For example, "Sugar Wax A-10E" (sucrose mixed fatty acid ester), "Cosmelike SA-10" (stearate acetate scroll), "Cosmelike MX-10" (sucrose mixed fatty acid ester) (first so far) Commercially available products such as Industrial Pharmaceutical Co., Ltd.) and "Clodesta 4-IS" (Clode Japan Co., Ltd.) (sucrose tetraisostearate) can be preferably used in the present invention.
One or more of these sucrose fatty acid esters can be used.

Examples of the alkylmethylsiloxane wax include alkyl (C30-40) methicone C30-C45 olefin and alkyl (C30-45) dimethylsilylpolypropylsilsesquioxane, and specific examples thereof include "AMS-C30 COSMETIC WAX" and "SW". −8005 C30 Resin Wax ”(Toray Dow Corning Co., Ltd.) or the like can be preferably used.

The blending amount of the solid oil and / or the semi-solid oil is 2 to 25% by mass, preferably 2 to 20% by mass, based on the total amount of the oil phase. When the blending amount of the solid oil and / or the semi-solid oil is in the range of 2 to 25% by mass with respect to the total amount of the oil phase, the emulsification stability can be ensured, and the feeling of use with freshness and good elongation can be ensured. While maintaining it, stickiness can be suppressed even as a prescription that can realize a high SPF value.

The blending amount of the solid oil and / or the semi-solid oil is preferably 0.5 to 5% by mass, and more preferably 1 to 5% by mass with respect to the total amount of the cosmetic. By setting the blending amount of solid oil and / or semi-solid oil in the range of 0.5 to 5% by mass with respect to the total amount of cosmetics, a high SPF value can be realized while maintaining a feeling of freshness and good spreadability. It can also suppress stickiness as a prescription.

<Powder>
The powder used in the present invention has silicones such as methylhydrogenpolysiloxane and dimethylpolysiloxane on the surface of inorganic powder particles, dextrin fatty acid ester, higher fatty acid, higher alcohol, fatty acid ester, metal soap, alkyl phosphate ether, and fluorine. It is a hydrophobic powder obtained by hydrophobizing a compound or a hydrocarbon such as squalane or paraffin by a wet method using a solvent, a vapor phase method, a mechanochemical method or the like.

As the inorganic powder, those that can be usually blended in cosmetics and external skin preparations can be used, for example, titanium oxide, zinc oxide, talc, mica, sericite, kaolin, mica titanium, black iron oxide, yellow iron oxide, red iron oxide, etc. Examples include ultramarine, dark blue, chromium oxide, and chromium hydroxide. In the case of sunscreen cosmetics, it is preferable to use an ultraviolet scattering agent such as fine particle titanium oxide or fine particle zinc oxide having an average primary particle size of less than 100 μm.

The blending amount of the powder may be set according to the purpose, but in sunscreen cosmetics and the like, 1% by mass or more, typically 3% by mass or more, may be blended with respect to the total amount of oil-in-water emulsified cosmetics. preferable. The upper limit is not particularly limited, but as the blending amount increases, the blending amount of the oil phase, which is a dispersion medium, inevitably increases, and the blending of other components is restricted. It is preferably 1% by mass or less, typically 10% by mass or less.

<Emulsifier>
As the emulsifier, a nonionic surfactant or an amphipathic polymer can be used, and an amphipathic polymer polymer is more preferable. More preferably, it is an alkyl-modified polysaccharide. When an amphipathic polymer is used as the emulsifier, the molecular weight is preferably 100,000 or more. Further, it is preferably 400,000 to 600,000. More specifically, a (Acrylate / steareth methacrylate-20) copolymer or a hydrophobically modified alkyl cellulose, for example, stearoxyhydroxypropyl cellulose may be used, or a commercially available product thereof may be used. For example, Sangelose 90L (display name: hydrophobic hydroxypropylmethylcellulose; manufactured by Daido Kasei Kogyo Co., Ltd.), Nanosol Plus 330cs (manufactured by Ashland), Polysurf 67cs (manufactured by Ashland) and the like can be mentioned. Particularly preferred is hydrophobically modified alkyl cellulose.

The blending amount of the emulsifier is preferably 0.1 to 0.5% by mass with respect to the total amount of the cosmetic. By setting the blending amount of the emulsifier in the range of 0.1 to 0.5% by mass with respect to the total amount of the cosmetic, a stable emulsion can be obtained and a light feel can be obtained at the time of application.
The ratio of the emulsifier blending amount [emulsifier blending amount / (solid oil and / or semi-solid oil blending amount)] to the solid oil and / or semi-solid oil blending amount is 0.04 to 0.4. Is preferable. By setting the ratio of the amount of the emulsifier to the amount of the solid oil and / or the semi-solid oil in this range, a fresher feel can be obtained.

<Thickener>
The oil-in-water emulsified cosmetic of the present invention preferably contains a thickener. The thickener is more preferably at least one selected from polyacrylamide compounds, anionic polymers and polysaccharides. Specifically, vinylpyrrolidone / 2-acrylamide-2-methylpropanesulfonic acid (salt) copolymer, dimethylacrylamide / 2-acrylamide-2-methylpropanesulfonic acid (salt) copolymer, acrylamide / 2-acrylamide. -2-Methylpropanesulfonic acid copolymer, (dimethylacrylamide / acryloyldimethyltaurine sodium) crosspolymer, dimethylacrylamide / 2-acrylamide-2-methylpropanesulfonic acid crosspolymer crosslinked with methylenebisacrylamide, polyacrylamide Poly such as a mixture of sodium polyacrylate and sodium acrylate / 2-acrylamide-2-methylpropanesulfonic acid copolymer, hydroxyethyl acrylate /2-acrylamide-2-methylpropanesulfonic acid (salt) copolymer, etc. Preferred examples include acrylamide compounds, anionic polymers such as polyacrylamide / ammonium acrylate copolymers, acrylamide / sodium acrylate copolymers, and polysaccharides such as xanthan gum. However, the present invention is not limited to these examples.
In the above, as the salt, an alkali metal salt (for example, calcium salt, magnesium salt, etc.), an ammonium salt, an organic amine salt (for example, monoethanolamine salt, diethanolamine salt, triethanolamine salt, etc.) and the like are preferable. Can be mentioned. As these thickeners, one kind or two or more kinds can be used.

Commercially available products can be preferably used as the thickener. For example, the (dimethylacrylamide / acryloyldimethyltaurine sodium) crosspolymer is "SU-GEL" (manufactured by Toho Kagaku Co., Ltd.), and the vinylpyrrolidone / 2-acrylamide-2-methylpropanesulfonic acid (salt) copolymer is used. , "ARISTOFLEX AVC" (manufactured by Clariant), "SIMULGEL EG" (manufactured by SEPIC), "SIMULGEL EPG" (SEPIC) as a copolymer of sodium acrylate / 2-acrylamide-2-methylpropanesulfonic acid (salt). As the acrylamide / 2-acrylamide-2-methylpropanesulfonic acid sodium salt copolymer, "SIMULGEL 600" (manufactured by SEPIC), as acrylamide / 2-acrylamide-2-methylpropanesulfonic acid (salt). , "SEPIGEL 305" (manufactured by SEPIC), "SEPIGEL 501" (manufactured by SEPIC), "Hostacerin AMPS" (manufactured by Clariant) as a homopolymer of 2-acrylamide-2-methylpropanesulfonic acid sodium salt. Examples include "SIMULGEL 800" (manufactured by SEPIC), and examples of the dimethylacrylamide / 2-acrylamide-2-methylpropanesulfonic acid include "SU-POLYMER G-1" (manufactured by Toho Kagaku Kogyo Co., Ltd.). Can be mentioned.

The blending amount of the thickener is preferably 0.1 to 0.5% by mass with respect to the total amount of the cosmetic. By setting the blending amount of the thickener in the range of 0.1 to 0.5% by mass with respect to the total amount of the cosmetic, a stable emulsion can be obtained and a light feel can be obtained at the time of application.

<UV absorber>
The oil-in-water emulsified cosmetic of the present invention preferably contains an ultraviolet absorber. The ultraviolet absorber is not particularly limited, but is preferably selected from an ultraviolet absorber that is insoluble in water and sparingly soluble in oil. Specifically, the ultraviolet absorber includes a benzoic acid-based ultraviolet absorber (for example, paraaminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy). PABA ethyl ester, N, N-dimethyl PABA ethyl ester, N, N-dimethyl PABA butyl ester, etc.); Anthranilic acid-based ultraviolet absorber (for example, homomentyl-N-acetylanthranilate, etc.); For example, amyl salicylate, menthyl salicylate, homomentyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, etc.; -4-Isopropyl cinnamate, Methyl-2,5-diisopropyl cinnamate, Ethyl-2,4-diisopropyl cinnamate, Methyl-2,4-diisopropyl cinnamate, propyl-p-methoxy cinnamate, isopropyl-p-methoxy Sinnamate, Isoamyl-p-Methoxysinamate, Octyl-p-methoxysinamate (2-ethylhexyl-p-methoxysinamate), 2-ethoxyethyl-p-methoxysinamate, Cyclohexyl-p-methoxysinamate, Ethyl -Α-Cyano-β-phenyl cinnamate, 2-ethylhexyl-α-cyano-β-phenyl cinnamate, glycerylmono-2-ethylhexanoyl-diparamethoxycinnamate, etc.; 2,4-Dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2', 4,4'-tetrahydroxybenzophenone, 2- Hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl- Benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone, etc.); 3- (4'-methylbenzylidene) -d, l-campayl, 3 -Benzylidene-d, l-Phenyl; 2-phenyl-5-methylbenzotriazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2- (2'-hydroxy-5'-t-octylphenyl) Benzotriazole; 2- (2'-hydroxy-5'-methylphenylbenzotriazole;dibenzalazine;dianisoilmethane;4-methoxy-4'-t-butyldibenzoylmethane; 5- (3,3-dimethyl-2-) Norbornylidene) -3-pentan-2-one, dimorpholinopyridadinone and the like are preferably mentioned.

In addition, a triazine derivative, specifically 2,4-bis-{[4- (2-ethylhexyloxy) -2-hydroxy] phenyl} -6- (4-methoxyphenyl)-(1,3,5) ) -Triazine (Tinosorb S), 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] 1,3,5-triazine (Ubinal T150) and the like are preferably mentioned.
Further, as the dibenzoylmethane derivative, 4-tert-butyl-4'-methoxydibenzoylmethane (for example, "Pulsole 1789") and the like are preferably mentioned.

<Oil phase>
Any component selected from hydrocarbon oils, silicone oils, ester oils, higher fatty acids, higher alcohols, etc. other than the above solid oils and / or semi-solid oils can be blended in the oil phase, and the effects of the present invention can be blended. It is not particularly limited as long as it does not impair.
Liquid fats and oils include, for example, avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, southern ka oil, castor oil, and flaxseed oil. , Saflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, teaseed oil, kaya oil, rice bran oil, cinnamon oil, Japanese millet oil, jojoba oil, germ oil, triglycerin and the like.

Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tortic acid, isostearic acid, linoleic acid, linoleic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid ( DHA) and the like.

Higher alcohols include, for example, linear alcohols (eg, lauryl alcohols, cetyl alcohols, stearyl alcohols, behenyl alcohols, myristyl alcohols, oleyl alcohols, cetostearyl alcohols, etc.); branched chain alcohols (eg, monostearyl glycerin ethers (batyl alcohols). ), 2-Deciltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.) and the like.

As the ester oil, an ester oil having a viscosity at 25 ° C. higher than 1500 mPa · s may be blended within a range that does not affect the effect of the present invention.

As the silicone oil, a silicone oil having a viscosity at 25 ° C. higher than 1500 mPa · s may be blended within a range that does not affect the effect of the present invention.

The oil phase is 40% by mass or less, preferably 20 to 30% by mass, based on the total amount of the cosmetic. When the oil phase is 40% by mass or less with respect to the total amount of cosmetics, it is possible to suppress stickiness while ensuring emulsification stability.

The oil-in-water emulsified cosmetic of the present invention has various components usually used in cosmetics, such as moisturizers, pH adjusters, neutralizers, antioxidants, preservatives, and antibacterial agents, as long as the effects are not impaired. Agents, drugs, extracts, fragrances, pigments, etc. can be blended.
Examples of the moisturizing agent include polyhydric alcohols such as glycerin, diethylene glycol, butylene glycol and polyethylene glycol, proteins such as amino acids, nucleic acids, collagen and elastin, and mucopolysaccharides such as hyaluronic acid and chondroitin sulfate.
Examples of the pH adjuster include lactic acid, citric acid, glycolic acid, succinic acid, tartrate acid, dl-malic acid, potassium carbonate, sodium hydrogencarbonate, ammonium hydrogencarbonate and the like.

Examples of the antioxidant include ascorbic acid, α-tocopherol, dibutylhydroxytoluene, butylhydroxyanisole and the like.
Examples of preservatives and antibacterial agents include paraoxybenzoic acid ester, phenoxyethanol, benzoic acid, salicylic acid, phenolic acid, sorbic acid, parachlormethacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, and photosensitizers. Can be mentioned.

The form of the oil-in-water emulsified cosmetic of the present invention is not particularly limited, and basic cosmetics such as lotion, milky lotion, cream, face wash, gel, essence (beauty liquid), pack, lipstick, eye shadow, eye liner, mascara. , Foundation, make-up cosmetics such as sunscreen, oral cosmetics, aromatic cosmetics, hair cosmetics, body cosmetics, etc., any form conventionally used for cosmetics can be widely applied.

Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. In addition, the blending amount in the following examples and the like indicates mass% unless otherwise specified.
Oil-in-water emulsified cosmetics having the compositions listed in Tables 1 and 2 below were prepared by a conventional method, and the following measurements and evaluations were carried out.

(UV protection effect)
The ultraviolet protection effect was performed using a highly accurate in vitro SPF measurement system described in JP-A No. 7-167781.
Specifically, a solar simulator (Solar Ultraviolet Simulator Model 600: Solar Light Co.) was used as the light source. The sample was uniformly applied to the transpore tape TM (3M Co.) used as the coating body at a coating amount of 2.0 mg / cm ² , dried for 15 minutes, and then irradiated with ultraviolet rays. Then, the transmitted ultraviolet spectrum was calculated and the SPF value was calculated.
The SPF values of the cosmetics of Examples and Comparative Examples calculated by the above method are standardized by the SPF value of the solid oil and / or semi-solid oil-free sample, and the solid oil and / or semi-solid oil-free sample is used. Was set to 1, and a value of 1 or less was evaluated as B, and a value of 1 or more was evaluated as A.

(Dispersibility of the state immediately after)
The state immediately after the obtained cosmetics were manufactured was visually observed and evaluated according to the following criteria.
A: Evenly dispersed B: Slightly undispersed part is seen C: Undispersed part is seen

(Stability over time)
The obtained cosmetics were visually observed in a state after 2 weeks at room temperature and evaluated according to the following criteria.
A: No separation is seen B: Oil separation is slightly seen C: Oil is partially separated

In addition, the feeling of use of the obtained cosmetics was evaluated according to the following criteria.
(Freshness)
Ten female specialist panels applied the cosmetics to the skin and evaluated the freshness of the application.
A: 8 or more panels felt freshness at the time of application B: 3 to 7 panels felt freshness at the time of application C: 2 or less panels felt freshness at the time of application

(A feeling of stickiness)
Ten female-specialized panels applied the cosmetics to the skin and evaluated the stickiness after application.
A: 8 or more panels admitted that there was no sticky feeling after application B: 3 to 7 panels admitted that there was no sticky feeling after application C: 2 or less panels admitted that there was no sticky feeling after application recognized

As shown in Tables 1 and 2, the oil-in-water emulsified cosmetic of the present invention is sticky as a formulation capable of achieving a high SPF value while maintaining the feeling of freshness required for the oil-in-water emulsified cosmetic. I was able to suppress it. On the other hand, in Comparative Example 1 containing no solid oil and / or semi-solid oil, although there is freshness, the blending amount is 25% by mass with respect to the total amount of the oil phase even if it contains sticky, solid oil and / or semi-solid oil. In Comparative Example 2, which is high, stickiness is suppressed, but the freshness required for oil-in-water emulsified cosmetics is lost. Further, even if the blending amount of the solid oil and / or the semi-solid oil is 2 to 25% by mass with respect to the total amount of the oil phase, it is shown in Comparative Example 3 that the oil phase exceeds 40% by mass with respect to the total amount of the cosmetics. Emulsification destruction occurred. In Comparative Example 3, since emulsification destruction occurred, the SPF value was not measured and the sensory evaluation was not performed. Further, as shown in Comparative Example 4, in the case of dextrin palmitate, as shown in Table 3, the viscosity was high, so that stickiness could not be suppressed. Comparative Example 5 is an example in which palmitic acid is used, and Comparative Example 6 is an example in which a higher alcohol is used, but in these cases, the stability over time, which is important as a cosmetic, was poor.

(Viscosity measurement)
A sample obtained by heating and dissolving each solid oil and / or semi-solid oil, fatty acid, and 2% higher alcohol using 98% diisopropyl sebacate as a solvent was left for 1 day, and then a B-type viscometer and a VDA-type viscometer (VDA type viscometer) at 25 ° C. Shibaura System Co., Ltd. DIGITAL VISMETRON VDA) 2. The measurement was performed under the conditions of a rotation speed of 12 rpm and 1 minute. The measurement results are shown in Table 3.

(Prescription example)
The following is a prescription example of the oil-in-water emulsified cosmetic of the present invention. The present invention is not limited to this formulation example. In addition, all the compounding amounts are expressed by mass% with respect to the total amount of products.

Formulation Example 1: Sunscreen Emulsion Macadamia Nut Oil Fatty Acid Phytosteryl 0.5
Diisopropyl sebacate 10
Sorbitan sesquiisostearate 0.5
2-ethylhexyl paramethoxycinnamate 7.5
Sodium hydroxymethoxybenzophenone sulfonate 3
Dimethylacrylamide / Acryloyl Dimethyltaurine Na Crosspolymer
0.5
Triethanolamine 1.8
Hydrophobizing treatment Titanium oxide 4
Concentrated glycerin 4
Polyethylene glycol 300 8
Ethanol 10
Phenoxyethanol 0.3
Ion-exchanged water residue

Prescription Example 2: Sunscreen Emulsion Vaseline 1
Diisopropyl sebacate 10
Sorbitan sesquiisostearate 0.5
2-ethylhexyl paramethoxycinnamate 7.5
2,4,6-Tris [4- (2-ethylhexyloxycarbonyl) anilino] 1,3,5-triazine
1.5
Stearoxy hydroxypropyl Methyl Cellulose 0.5
Hydrophobizing treatment Titanium oxide 4
Concentrated glycerin 4
Polyethylene glycol 300 8
Ethanol 10
Ion-exchanged water residue

Prescription Example 3: Sunscreen Emulsion Vaseline 1
Diisopropyl sebacate 10
Sorbitan sesquiisostearate 0.5
2-ethylhexyl paramethoxycinnamate 1.5
2,4,6-Tris [4- (2-ethylhexyloxycarbonyl) anilino] 1,3,5-triazine
1.5
Oxybenzone 1
Polysilicone-15 2.0
Octocrylene 2.0
Methylenebisbenzotriazolyltetramethylbutylphenol 2.0
2- [4- (diethylamino) -2-hydroxybenzoyl] benzoic acid hexyl ester
1.0
Stearoxy hydroxypropyl Methyl Cellulose 0.5
Xanthan gum 0.1
Tranexamic acid 2.0
Dipotassium glycyrrhizinate 0.05
4-Methoxysalicylic acid potassium salt 2.0
Hydrophobizing treatment Titanium oxide 4
Concentrated glycerin 4
Polyethylene glycol 300 8
Ethanol 10
Ion-exchanged water residue

Prescription Example 4: Sunscreen Emulsion Sucrose Stearic Acid Ester 1
Diisopropyl sebacate 10
2-Ethylhexyl succinate 5
Methylpolysiloxane 1
Sorbitan sesquiisostearate 0.5
2-ethylhexyl paramethoxycinnamate 7.5
Sodium hydroxymethoxybenzophenone sulfonate 3
Dimethylacrylamide / Acryloyl Dimethyltaurine Na Crosspolymer
0.5
Triethanolamine 1.8
Hydrophobizing treatment Titanium oxide 4
Concentrated glycerin 4
Polyethylene glycol 300 8
Ethanol 10
Phenoxyethanol 0.3
Ion-exchanged water residue

Claims (9)

An oil-in-water emulsified cosmetic containing a solid oil and / or a semi-solid oil, a powder, and an emulsifier.
The solid oil and / or semi-solid oil is an alkyl (C30-40) methicon C30-C45 olefin or an alkyl (C30-45) dimethylsilylpolypropylsilsesquioxane with a viscosity at 25 ° C. of 1500 mPa · s or less. Moreover, the blending amount is 2 to 25% by mass with respect to the total amount of the oil phase.
The blending amount of the solid oil and / or the semi-solid oil was 0.5 to 5% by mass with respect to the total amount of the cosmetic.
The oil phase is 40% by mass or less based on the total amount of cosmetics.
An oil-in-water emulsified cosmetic in which the powder is a fine particle powder that has been hydrophobized. The oil-in-water emulsified cosmetic according to claim 1, wherein the emulsifier is an amphipathic polymer polymer. The oil-in-water emulsified cosmetic according to claim 1 or 2, wherein the emulsifier is an alkyl-modified polysaccharide. The oil-in-water emulsified cosmetic according to claim 3, wherein the emulsifier is hydrophobically modified alkyl cellulose. The oil-in-water emulsified cosmetic according to any one of claims 1 to 4 , wherein the ratio of the blending amount of the emulsifier to the blending amount of the solid oil and / or the semi-solid oil is 0.04 to 0.4. The oil-in-water emulsified cosmetic according to any one of claims 1 to 5 , wherein the blending amount of the powder is 3 to 10% by mass with respect to the total amount of the cosmetic. The oil-in-water emulsified makeup according to any one of claims 1 to 6 , further comprising a thickener, wherein the thickener is at least one selected from polyacrylamide compounds, anionic polymers and polysaccharides. Fee. The thickeners are (dimethylacrylamide / acryloyldimethyltaurine sodium) crosspolymer, vinylpyrrolidone / 2-acrylamide-2-methylpropanesulfonic acid (salt) copolymer, sodium acrylate / 2-acrylamide-2-methylpropane. Sulfonic acid (salt) copolymer, acrylamide / 2-acrylamide-2-methylpropanesulfonic acid sodium salt copolymer, acrylamide / 2-acrylamide-2-methylpropanesulfonic acid (salt), 2-acrylamide-2-methyl The oil-in-water emulsified cosmetic according to claim 7 , which is at least one selected from a homopolymer of a sodium propanesulfonic acid salt, dimethylacrylamide / 2-acrylamide-2-methylpropanesulfonic acid, a carboxyvinyl polymer, and xanthan gum. The oil-in-water emulsified cosmetic according to any one of claims 1 to 8 , wherein the oil phase contains an ultraviolet absorber.