JP6831737B2 - Underwater oil type cosmetics - Google Patents

Description

The present invention relates to an oil-in-water cosmetic containing dimethylsilylated silica and / or trimethylsilylated silica, polyhydroxystearic acid, and dimethicodiethylbenzalmaronate, and more specifically, it has excellent water resistance and is used. It relates to an oil-in-water type cosmetic having a good feeling and excellent dispersion stability.

Conventionally, cosmetics containing various UV protection agents have been marketed for the purpose of UV protection, but the market for cosmetics that have both a fresh feeling of use and high UV protection ability, assuming daily use. Is expanding. Especially in recent years, cosmetics with UV protection ability are often used in swimming pools and sea bathing, and in sweaty scenes, and from the viewpoint of sustaining the UV protection effect, those with excellent water resistance are required. There is. Therefore, there have been reports of techniques (Patent Documents 1 and 2) for obtaining water resistance by blending a polymer compound with an oil-in-water cosmetic that is expected to be fresh at the time of starting.

Japanese Unexamined Patent Publication No. 2011-032249 JP 2015-003885

Patent Document 1 reports that an oil-in-water cosmetic containing a polyion complex formed of a cationic polymer and carboxymethyl cellulose has effects such as water resistance. Further, Patent Document 2 describes an oil-in-water cosmetic containing a combination of three types of polymers: (acryloyldimethyltaurine ammonium / VP) copolymer, (Na acrylate / acryloyldimethyltaurine Na) copolymer, and polymethylmethacrylate. It is reported that it has effects such as water resistance. However, in both reports, the stickiness peculiar to these polymers still existed, and the water resistance was not sufficient.
That is, there is no known underwater oil-type cosmetic that has a freshness at the time of starting, is not sticky, and has an ultraviolet protection effect having excellent water resistance.

In view of these circumstances, the present inventor has conducted diligent research, and as a result, the oil-in-water cosmetics containing dimethylsilylated silica and / or trimethylsilylated silica are excellent in freshness at the time of starting, and further, It has been found that the coating film has excellent water resistance when applied. Furthermore, it was discovered that the addition of polyhydroxystearic acid improved the dispersion stability of dimethylsilylated silica and / or trimethylsilylated silica, and further significantly improved water resistance. Furthermore, oil-in-water cosmetics containing dimethicodiethylbenzalmaronate in combination with dimethylsilylated silica and / or trimethylsilylated silica and polyhydroxystearic acid not only have a UV protection effect, but also start. We have found that the freshness of the coating film is excellent, the water resistance of the coating film is better, and the dispersion stability is also excellent, and the present invention has been completed.

That is, the present invention describes the following components (a) to (c);
It provides an oil-in-water cosmetic containing (a) dimethylsilylated silica and / or trimethylsilylated silica (b) polyhydroxystearic acid (c) dimethicodiethylbenzalmaronate.

In the present invention, the average particle size of the component (a) may be 1 to 50 nm.
In the present invention, the content mass ratio (a) / (b) of the component (a) and the component (b) may be 0.1 to 200.
The oil-in-water type cosmetic of the present invention may further contain the component (d) volatile oil agent.

The oil-in-water type cosmetic of the present invention has good freshness at the time of starting, excellent water resistance, and good dispersion stability. In particular, dimethicodiethylbenzalmalonate has an ability to absorb ultraviolet rays, so it is useful as a sunscreen, a make-up cosmetic, and a daytime beauty essence for the purpose of protecting against ultraviolet rays, and is convenient in daily life. Can be used.

Hereinafter, the present invention will be described in detail. In addition, in this specification, "~" means the range including the numerical values before and after it. In addition, the numerical value expressed in% is a value based on mass unless otherwise specified.

The component (a) used in the present invention is dimethylsilylated silica and / or trimethylsilylated silica, and dimethylsilylated silica and trimethylsilylated silica are trimethylsilylated silica whose surface is dimethylsilylated, respectively. There is no particular limitation as long as it is a product that has been chemically treated and is used for cosmetics. Further, the silica used in the component (a) is not particularly limited in its shape, size, particle structure, etc., and may be spherical, substantially spherical, plate-shaped, porous, or non-porous. .. The dimethylsilylation treatment and the trimethylsilylation treatment are not particularly limited, but can be carried out by a usual surface treatment method using a silicone compound such as reactive organosilane or organosilazane, and the silicone compound used is specific. Examples of the dimethylsilylation treatment include dimethyldichlorosilane, and trimethylsilylation treatment includes trimethylchlorosilane and hexamethyldisilazane. The average particle size of the component (a) is not particularly limited, but is preferably 1 to 50 nm, more preferably 5 to 30 nm, from the viewpoint of improving the water resistance of the coating film, dispersion stability, and emulsion stability. The average particle size can be obtained from an electron micrograph. Examples of commercially available products include AEROSIL R972, AEROSIL R974, and AEROSIL R976 (all manufactured by Nippon Aerosil Co., Ltd.).

The content of the component (a) in the present invention is not particularly limited, but is preferably 0.1 to 5.0% by mass (hereinafter, "mass%" is simply abbreviated as "%"), and 0.2 to 4. 0% is more preferable, and 0.3 to 3.0% is particularly preferable. Within this range, the spread and spread and freshness during use become better, and the water resistance is also excellent.

The component (b) polyhydroxystearic acid used in the present invention is a polymer of hydroxystearic acid having one hydroxyl group. In the present invention, the hydroxyl group of the hydroxystearic acid of the component (b) is preferably at the 12-position in terms of improving the dispersion stability of the component (a) and improving the water resistance, and the degree of polymerization of the hydroxystearic acid is 3 to 12 is preferable, and the degree of polymerization 4 to 8 is more preferable. Examples of the commercially available product of the component (b) include Saracos HS-6C (manufactured by Nisshin Oillio Group).

The content of the component (b) in the present invention is not particularly limited, but is preferably 0.01 to 5.0%, more preferably 0.02 to 4.0%, and particularly preferably 0.05 to 2.0%. preferable. Within this range, the spread and spread and freshness during use become better, and the water resistance is also excellent. Further, in the oil-in-water cosmetic of the present invention, the content mass ratio (a) / (b) of the component (a) and the component (b) is not particularly limited, but is preferably 0.1 to 200, preferably 0.2 to 200. 100 is more preferable, 0.3 to 50 is even more preferable, and 0.5 to 25 is particularly preferable. Within this range, a cosmetic film having more excellent water resistance can be obtained.

The chemical name of the component (c) dimethicodiethylbenzalmalonate in the present invention is α- (trimethylsilyl)-(trimethylsilyloxy) poly [oxy (dimethyl) silicone] -co- [oxy (methyl) (2- {p-). [2,2-bis (ethoxycarbonyl) vinyl] phenoxy} -1-methyleneethyl) silicone] -co- [oxy (methyl) (2- {p- [2,2-bis (ethoxycarbonyl) vinyl] phenoxy} pro -Enyl) silylene], INCI (INTERRNATIONAL NOMENCLATTURE of COSMETIC INGREDINITS) is indicated by polysilicone-15, and about 7.5% of dimethicone having a chain length of about 60 is substituted with two substituents. It is a silicone derivative having. In the present invention, the component (c) is useful for improving the dispersibility of the component (a), improving the water resistance of the coating film of the oil-in-water cosmetics, and further improving the emulsion stability. As a commercially available product, PARSOL SLX (manufactured by DSM NUTRITION PRODUCTS) can be exemplified.

The content of the component (c) in the present invention is not particularly limited, but is preferably 0.1 to 5%, more preferably 0.2 to 5%, and particularly preferably 0.5 to 4%. Within this range, not only a high UV protection effect can be obtained, but also the dispersibility and emulsion stability of the component (a) are improved.

In the present invention, it is preferable to contain the component (d) volatile oil agent from the viewpoint of improving the water resistance of the coating film. The volatile oil agent is an oil agent having a boiling point of 260 ° C. or less at 1 atm. The component (d) is not particularly limited as long as it is usually used in cosmetics, but specifically, as a hydrocarbon, isododecane, isohexadecane, a light liquid isoparaffin, and as a silicone oil, a low molecular weight methylpolysiloxane and a deca. Examples thereof include methylcyclopentasiloxane, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane, methyltrimethicone, decamethyltetrasiloxane, and ethyltrisiloxane. Among these, isododecane, isohexadecane, and light liquid isoparaffin are preferable from the viewpoint of improving the water resistance of the coating film. Commercially available products include Isopar H (manufactured by Esso Chemical Co., Ltd.), Isododecane (manufactured by Bayer), Isohexadecane (manufactured by Unichema), IP Solvent 1620MU, IP Solvent 2028MU, and IP Solvent 2835 (above, Idemitsu Kosan) TFS405 (manufactured by Toshiba Silicone), SH245, DC345 (manufactured by Toray Dow Corning), KF-995 (manufactured by Shin-Etsu Chemical Co., Ltd.) as decamethylcyclopentasiloxane, and silicone TMF as methyltrimethicone. -1.5 (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96L-2CS (manufactured by Shin-Etsu Chemical Co., Ltd.) as low molecular weight methylpolysiloxane, KF-96L-1.5CS (manufactured by Shin-Etsu Chemical Co., Ltd.) as decamethyltetrasiloxane ), Examples of ethyltrisiloxane include SILSOFT ETS (manufactured by Momentive Performance Materials).

The content of the component (d) is not particularly limited, but is preferably 3 to 10%, more preferably 4 to 8%, and particularly preferably 5 to 7%. Within this range, a cosmetic film having more excellent water resistance can be obtained.

In the oil-in-water sunscreen cosmetics of the present invention, ingredients used in ordinary cosmetics can be blended as necessary within a quantitative and qualitative range that does not impair the effects of the present invention. For example, an aqueous component, a liquid oil other than the components (c) and (d), a semi-solid oil or a solid oil, a surfactant other than the component (b), a powder other than the component (a), a dye, and the component (c). Other examples include UV absorbers, water-soluble polymers, moisturizers, antioxidants, beauty ingredients, preservatives, fragrances, and refreshing agents.

The aqueous component can form the outer aqueous phase of the oil-in-water cosmetic, and may be any component soluble in water in addition to water. For example, lower grades such as ethyl alcohol and isopropyl alcohol. Alcohols, propylene glycol, 1,3-butylene glycol, dipropylene glycol, polyethylene glycol and other glycols, glycerin, diglycerin, polyglycerin and other glycerols, aloe vera, witch hazel, hamamelis, cucumber, lemon, lavender, rose And the like plant extracts and the like. The content of the aqueous phase is preferably 35 to 80% of the total cosmetics from the viewpoint of usability and stability.

The liquid oils other than the components (c) and (d) can form the internal oil phase of the oil-in-water type cosmetics, and are not particularly limited as long as they are used for cosmetics, and are volatile and non-volatile. Regardless of the origin of volatile oils, animal oils, vegetable oils, synthetic oils, etc., hydrocarbons, oils and fats, ester oils, fatty acids, higher alcohols, silicone oils, fluorooils, lanolin derivatives, etc. are listed. Be done. Liquid oil is an oil that exhibits a liquid state at 25 ° C. under 1 atm, and "liquid" refers to an oil having a viscosity value of 7,000 mPa · s or less as measured by a B-type viscometer (rotor No. 2). .. The viscosity value of the liquid oil is preferably 5000 mPa · s or less at 25 ° C. under 1 atm, more preferably, in terms of ensuring fluidity during emulsification and obtaining emulsified droplets having excellent emulsification stability. It is 4000 mPa · s or less. The liquid oil is not particularly limited, but specifically, fats and oils such as olive oil, castor oil, mink oil, macadamian nut oil, avocado oil, and medufoam oil, jojoba oil, diisobutyl adipate, and 2-hexyl adipate. Decyl, di-2-heptyl undecyl adipate, alkyl glycol monoisostearate, isosetyl isostearate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, neopentyl glycol di-2-ethylhexanoate, Trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl 2-ethylhexanoate, oleyl oleate, octyldodecyl oleate, decyl oleate, neopentyl glycol dicaprate, propylene dicaprate Glycol, triethyl citrate, di-2-ethylhexyl succinate, isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl lactate, myristyl lactate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-Hexyldecyl palmitate, 2-heptylundecyl palmitate, dipentaerythritol fatty acid ester, isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, isopropyl palmitate, 2-octyldodecyl myristate, 2-hexyldecyl myristate , Myristyl myristate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, diisostearyl malate, glyceryl tri2-ethylhexanoate, glyceryl tri (capril caprin), glyceryl tricaprate, glyceryl triisostearate , Diglyceryl diisostearate, diglyceryl triisostearate, diglyceryl tetraisostearate, decaglyceryl decaisostearate, glyceryl triisopalmitate, glyceryl trimyristate, diglyceryl isostearyl myristate, tritridecyl trimeritate and the like. , Fatty oils such as isothearic acid and oleic acid, higher alcohols such as oleyl alcohol and isostearyl alcohol, lanolin derivatives such as lanolin acetate, lanolin fatty acid isopropyl and lanolin alcohol, polar oils such as low polymerization degree methylpolysiloxane, Takashige Silicone oils such as moderate methylpolysiloxane, methylphenylpolysiloxane, and fluorine-modified organopolysiloxane, fluorine-based oils such as perfluorodecane, perfluorooctane, and perfluoropolyether, liquid paraffin, heavy liquid isoparaffin, α- Examples thereof include non-polar oils such as olefin oligomers, squalane, polyisobutylene, hydrocarbons such as polybutene, and the like, and these can be used alone or in combination of two or more as required. Among these, cetyl 2-ethylhexanoate, propylene glycol dicaproate, and di-2-ethylhexyl succinate are preferable in terms of dispersion stability, emulsion stability, and water resistance improvement.

The content of the liquid oil in the total cosmetics in the present invention is not particularly limited, but is preferably 3 to 30%, more preferably 5 to 25%. Within this range, a cosmetic film having good dispersion stability and emulsion stability and more excellent water resistance can be obtained. Further, particularly from the viewpoint of improving water resistance, the content mass ratio of the component (a) to the liquid oil is preferably 1: 0.5 to 200, more preferably 1: 0.75 to 100, and 1: 1 to 50%. Especially preferable.

Solid oils and semi-solids can form the internal oil phase of oil-in-water cosmetics, and hydrocarbons, oils and fats regardless of the origin of animal oils, vegetable oils, synthetic oils, etc. that are generally used in cosmetics. , Rows, hardened oils, ester oils, fatty acids, higher alcohols, silicone oils, fluorine-based oils, lanolin derivatives, solid oils such as oily gelling agents, and semi-solid oils. Further, "semi-solid" refers to a viscosity value exceeding 7,000 mPa · s as measured by a B-type viscometer (rotor No. 2) at 25 ° C. under 1 atm.

The surfactant other than the component (b) is not particularly limited, and examples thereof include a nonionic surfactant, an anionic surfactant, and a cationic surfactant. For example, examples of the nonionic surfactant include polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene cured castor oil, cured castor oil, polyoxyethylene sorbitol tetra fatty acid ester, glycerin fatty acid ester, and sorbitan fatty acid ester. , Polyglycerin fatty acid ester, sucrose fatty acid ester, alkyl polyglucoside, N-alkyldimethylamine oxide polyoxyethylene glycerin fatty acid ester, polyoxyethylene cholesteryl ether, polyoxyethylene phytosteryl ether, polyoxyethylene alkyl ether, polyoxyethylene Examples thereof include polyoxypropylene alkyl ether and polyoxyethylene alkyl phenyl ether. For example, examples of anionic surfactants include sodium salts or triethanolamine salts of fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid and isostearic acid, polyoxyethylene lauryl ether phosphoric acid and polyoxyethylene cetyl ether phosphoric acid. , Polyoxyethylene alkyl ether phosphoric acid esters such as polyoxyethylene oleyl ether phosphoric acid and polyoxyethylene nonylphenyl ether phosphoric acid. For example, as cationic surfactants, stearyltrimethylammonium chloride, stearyltrimethylammonium bromide, behenyltrimethylammonium chloride, behenyltrimethylammonium bromide, cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, distearyldimethylammonium chloride, odor. Distearyl dimethylammonium, dibehenyl dimethyl ammonium chloride, dibehenyl dimethyl ammonium bromide, disetyl dimethyl ammonium chloride, disetyl dimethyl ammonium bromide, stearyl dimethyl benzyl ammonium chloride, dilauryl dimethyl ammonium chloride, dipolyoxyethylene chloride ( 15 mol) Palm oil alkylmethylammonium, dipolyoxyethylene chloride (4 mol) lauryl ether dimethylammonium, amidopropyltrimethylammonium chloride stearate, dicocoylethylhydroxyethylmethylammonium, methylsulfate, etc. Alternatively, two or more types can be used. Among these, nonionic surfactants are preferable from the viewpoint of dispersion stability, emulsion stability and improvement of usability, and the content of the surfactant is as follows in all cosmetics from the viewpoint of usability. It is preferably 0 to 8%, more preferably 0.1 to 7%, and particularly preferably 0.3 to 6%.

The ultraviolet absorber other than the component (c) may be any ultraviolet absorber usually used for cosmetics and external preparations for skin, and is not particularly limited. For example, 2-ethylhexyl paramethoxysilicate and 2-ethylhexyl salicylate. , Phenylbenzimidazole sulfonic acid, oxybenzone-3, oxybenzophenone-4, oxybenzophenone-5, 2- [4- (diethylamino) -2-hydroxybenzoyl] benzoic acid hexyl ester, ethyl paraaminobenzoate, benzophenone-1, benzophenone-3 , Benzophenone-6, Benzophenone-9, 2,4,6-Tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine, Dioctylbutamidotriazone, 4-tert-butyl-4 '-Methoxy-dibenzoylmethane, 2,4-bis {[4- (2-ethylhexyloxy) -2-hydroxy] -phenyl} -6- (4-methoxyphenyl)-(1,3,5)- Examples thereof include triazine, 2,2'-methylenebis [6- (2H-benzotriazole-2yl) -4- (1,1,3,3-tetramethylbutyl) phenol], and one or more of these. Can be used. Among these, 2-ethylhexyl paramethoxycinnamate, 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 is preferable in that the UV protection effect is improved when used in combination with the component (c). The content of the ultraviolet absorber in the present invention is not particularly limited, but is preferably 3 to 20%, more preferably 5 to 15%. Within this range, the emulsification stability is good, the feeling of use is fresher, and the water resistance is also better.

The powder other than the component (a) is not particularly limited, and examples of the organic powder and the dye include nylon powder, polymethylmethacrylate powder, acrylonitrile-methacrylic acid copolymer powder, and vinylidene chloride-methacrylic acid copolymer. Examples include organic powders such as powders, polyethylene powders, polystyrene powders, polyurethane powders, wool powders, silk powders, crystalline cellulose powders, N-acyllysine powders, organic tar pigments, and organic pigments such as lake pigments. Alternatively, two or more types can be used.

The inorganic powder is not particularly limited depending on the shape such as spherical, plate-like, needle-like, particle diameter such as fumes, fine particles, pigment grade, and particle structure such as porous and non-porous. Specifically, corn, silicic anhydride, magnesium oxide, magnesium carbonate, calcium carbonate, chromium oxide, chromium hydroxide, aluminum silicate, magnesium silicate, magnesium silicate, mica, synthetic mica, sericite, talc, kaolin , Silicon dioxide, barium sulfate, bentonite, smectite, boron nitride, bismuth oxychloride, zinc oxide, titanium oxide coated mica, iron oxide coated mica, iron oxide coated mica titanium, organic pigment coated mica titanium, titanium oxide coated glass powder, oxidation Examples include iron titanium oxide-coated glass powder, aluminum powder, fine particle titanium oxide-coated mica titanium, fine particle zinc oxide-coated mica titanium, barium sulfate-coated mica titanium, titanium oxide-containing silicic acid anhydride, zinc oxide-containing silicic acid anhydride, and the like. One type or two or more types can be used depending on the purpose of use.

The water-soluble polymer is not particularly limited, but is a natural polymer such as guar gum, sodium chondroitin sulfate, sodium hyaluronate, arabic gum, sodium alginate, carrageenan, and a semi-synthetic polymer such as methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose. , Carboxyvinyl polymer, alkyl-added carboxyvinyl polymer, sodium polyacrylate and other synthetic systems. Examples of the water-soluble film-forming resin include polyvinylpyrrolidone, vinylpyrrolidone / vinyl acetate copolymer, and the like, and other moisturizing agents such as protein, mucopolysaccharide, collagen, elastin, and keratin can be added.

The method for producing the oil-in-water cosmetics of the present invention is not particularly limited and can be produced by a generally known method, and the production equipment may be any dispersion / emulsification equipment such as a general dispersion. For example, component (a) dimethylsilylated silica and / or trimethylsilylated silica, component (b) polyhydroxystearic acid, and component ( c) An oil-in-water cosmetic product can be obtained by emulsifying dimethicodiethylbenzalmaronate by adding an oil-based component previously dispersed and treated with a three-roll mill.

The form of the oil-in-water type cosmetic of the present invention is not particularly limited, and examples thereof include a liquid, a milky liquid, a cream, and a solid.

The underwater oil-type cosmetic of the present invention can be suitably used for milky lotions, beauty essences, packs, creams, sunscreens, cleansing agents, foundations, makeup bases, eye shadows, etc., and has excellent UV protection effect and water resistance. From this point of view, sunscreens, daytime emulsions, make-up bases, foundations and the like are preferable, and sunscreen cosmetics are particularly preferable.

Hereinafter, the present invention will be described in detail with reference to examples. It should be noted that these do not limit the present invention in any way.
Examples 1 to 14 and Comparative Examples 1 to 8: Oil-in-water cosmetics Oil-in-water cosmetics were prepared by the compositions shown in Tables 1 to 3 and the following production methods. The water resistance, freshness during use, and dispersion stability of the obtained sample were evaluated by the following methods, and the results are also shown in Tables 1 to 3.

(Production method)
A: Ingredients (1) to (3) are uniformly heated and mixed at 70 ° C.
B: Ingredients (19) to (26) are uniformly heated and mixed at 70 ° C.
C: Ingredients (4) to (18) are dispersed and treated with a three-roll mill.
D: C and B are uniformly heated and mixed at 70 ° C.
E: An oil-in-water cosmetic was obtained by adding D to A and emulsifying at 70 ° C.

(Evaluation method 1: Water resistance)
After applying each of the above samples (2 mg / cm ² ) to a PMMA plate (HELIOPLATE HD6 manufactured by Labsphere), the sample left to stand for 20 minutes was subjected to SPF measurement using an SPF analyzer (UV-2000S manufactured by Labsphere). , The SPF value before bathing was measured. Next, a water bath treatment was performed. As the water bath treatment, a sample was attached to the side surface of the container in which 2 L of water was stored at 35 ° C., and the water in the container was stirred at 300 rpm for 5 minutes using a paddle mixer. After the water bath was completed, the product was allowed to stand and dry for 20 minutes, and then the SPF value was measured after the water bath using the SPF analyzer. In each sample, the same operation was carried out 9 times (N = 9), and the average value of the SPF value before the aqueous phase and the SPF value after the water bath was calculated. Then, according to the following formula (1), the water resistance was evaluated on a 5-point scale based on the SPF residual rate before and after the water bath according to the following evaluation criteria (a), and the judgment was made.
(SPF residual rate before and after bathing) = (measured value of SPF after bathing) / (measured value of SPF before bathing) ... Equation (1)
(A) Five-level evaluation criteria (evaluation): (judgment)
(SPF residual rate before and after bathing) = 0.9 or more: ◎◎
(SPF residual rate before and after bathing) = 0.7 or more and less than 0.9: ◎
(SPF residual rate before and after bathing) = 0.5 or more and less than 0.7: ○
(SPF residual rate before and after bathing) = 0.3 or more and less than 0.5: ▲
(SPF residual rate before and after bathing) = less than 0.3: ×

(Evaluation method 2: Freshness)
Five expert evaluation panels were asked to apply each of the above samples to the forearm, and the freshness during use was evaluated and judged on a four-point scale according to the following (b) evaluation criteria.
(B) 4-step evaluation criteria (evaluation): (judgment)
All 5 people felt fresh: ◎
The number of people who felt fresh was 3-4 people: ○
The number of people who felt fresh was 1-2 people: ▲
The number of people who felt fresh was 0: ×

(Evaluation method 3: Dispersion stability)
Each of the above samples was placed in a standard glass bottle, stored in a constant temperature bath at 5 ° C. for 1 month, and then a thin film was drawn on a glass plate using an applicator with a thickness of 25 μm. After observing, it was judged according to the following three-step judgment criteria according to the aggregated state of the powder.
(C) Three-stage judgment criteria (evaluation): (judgment)
No powder agglutination: ○
There is a small agglomeration: ▲
There is a large agglomeration: ×

The oil-in-water cosmetics of Examples 1 to 14 were excellent in water resistance, freshness at the time of use, and dispersion stability as compared with Comparative Examples 1 to 8.
Comparative Examples 1 and 3, which contained silica and zinc oxide instead of the component (a), were inferior in freshness and dispersion stability as compared with Examples 1 to 3. Further, Comparative Example 2 containing silicone-coated silica subjected to a hydrophobizing treatment instead of the component (a) was inferior in water resistance.
Further, Comparative Examples 4, 5 and 6 in which sorbitan sesquiisostearate, PEG / PPG-19 / 19 dimethicone and PEG-9 polydimethylsiloxyethyl dimethicone were replaced with component (b), respectively, were compared with Example 1. Therefore, it was inferior in water resistance, freshness, and dispersion stability.
Further, Comparative Examples 20 and 21 in which the component (c) was replaced with methylpolysiloxane (6 cs (25 ° C.)) and methylpolysiloxane (100 cs (25 ° C.)), respectively, were water resistant as compared with Example 1. It was inferior in dispersion stability.

Example 15: Base cosmetic (creamy)
(Component) (% by mass)
1. 1. PEG-80 hydrogenated castor oil (Note 10) 0.2
2.1,3-butylene glycol 12
3. 3. Methylparaben 0.1
4. Purified water 4.8
5. (Sodium acrylate / Sodium acryloyldimethyltaurine)
Copolymer dispersion (Note 11) 1.5
6. Residual amount of purified water 7. Ethanol 5
8. Dimethylsilylated silica (Note 1) 2.5
9. Trimethylsilylated silica (Note 2) 0.5
10. Dimethicodiethylbenzalmalonate (Note 9) 2
11. Polyhydroxystearic acid (Note 6) 0.5
12.2-[4- (Diethylamino) -2-hydroxybenzoyl] benzoic acid hexyl ester
7.5
13. Methylpolysiloxane (6cs (25 ° C)) 2.5
14. Decamethylcyclopentasiloxane 3
(Note 11) SIMULGEL EG (manufactured by SEPPIC)

(Production method)
A: The components (1) to (4) are uniformly heated and mixed at 70 ° C.
B: Ingredients (5) to (7) are uniformly heated and mixed at 70 ° C.
C: Ingredients (8) to (12) are dispersed and treated with a three-roll mill.
D: A and B are uniformly heated and mixed at 70 ° C.
E: Ingredients (13), (14) and C are uniformly heated and mixed at 70 ° C.
An oil-in-water cosmetic was obtained by adding E to F: D and emulsifying at 70 ° C.
(result)
The base cosmetic of Example 15 had excellent dispersion stability and had a uniform film with water resistance while having a fresh feel at the time of starting.

Example 16: Sunscreen cosmetic (creamy)
(Ingredient) (%)
1. 1. Triceteares-4 Phosphate 0.05
2. 2. PEG-30 Phytosterol 0.2
3.1,3-butylene glycol 12
4. Methylparaben 0.1
5. Tranexamic acid 2
6. Lactic acid soda 1.5
7. Purified water 4.8
8. (Sodium acrylate / Sodium acryloyldimethyltaurine)
Copolymer dispersion (Note 11) 1
9. Residual amount of purified water 10. Glycerin 5
11. Dimethylsilylated silica (Note 1) 4
12. Zinc oxide 1
13. (Vinyl Dimethicone / Lauryl Dimethicone) Cross Polymer 0.5
14. (Dimethicone / Vinyl Phenyl Dimethicone) Cross Polymer 0.2
15. Polyhydroxystearic acid (Note 6) 0.5
16. Dimethicodiethylbenzalmalonate (Note 9) 2
17. 2-ethylhexyl paramethoxycinnamate 7
18.2,4-Bis {[4- (2-ethyl-hexyloxy) -2-hydroxy] -phenyl} -6- (4-methoxyphenyl)-(1,3,5) -triazine
0.5
19. Methylpolysiloxane (6cs (25 ° C)) 2.5
20. Glyceryl tri2-ethylhexanoate 6
21. Setostearyl alcohol 1.5
22. Behenyl alcohol 0.5

(Production method)
A: Ingredients (1) to (7) are uniformly heated and mixed at 70 ° C.
B: Ingredients (8) to (10) are uniformly heated and mixed at 70 ° C.
C: Components (11) to (18) are dispersed and treated with a three-roll mill.
D: Ingredients (19) to (22) are uniformly heated and mixed at 70 ° C.
E: D and C are uniformly heated and mixed at 70 ° C.
F: A and B were mixed, E was added thereto, and the mixture was emulsified at 70 ° C. to obtain an oil-in-water cosmetic.
(result)
The sunscreen cosmetic of Example 16 had excellent dispersion stability and had a uniform film with water resistance while having a fresh feel at the time of starting.

Example 17: Daytime serum (ingredient) (%)
1. 1. Polyoxyethylene sorbitan monooleate (20EO) 0.1
2.1,3-butylene glycol 12
3. 3. Methylparaben 0.1
4. Residual amount of purified water 5. Ethanol 6
6. Trimethylsilylated silica (Note 2) 0.5
7. (Vinyl Dimethicone / Lauryl Dimethicone) Cross Polymer 0.5
8. Polyhydroxystearic acid (Note 6) 0.5
9. Dimethicodiethylbenzalmalonate (Note 9) 4
10. 2-ethylhexyl paramethoxycinnamate 7.5
11. Methylpolysiloxane (6cs (25 ° C)) 2.5
12. Decamethylcyclopentasiloxane 3
13.2-Cetyl ethylcaproate 4
14. Propylene glycol dicaprate 2
15. Tocopherol acetate 0.01
16. Ceramide 2 0.005
17. Ceramide 3 0.005

(Production method)
A: Ingredients (1) to (5) are uniformly heated and mixed at 70 ° C.
B: Ingredients (6) to (10) are dispersed and treated with a three-roll mill.
C: Ingredients (13) to (17) are uniformly heated and mixed at 70 ° C.
D: B, C, components (11) and (12) are uniformly heated and mixed at 70 ° C.
E: An oil-in-water cosmetic was obtained by adding D to A and emulsifying at 70 ° C.
(result)
The daytime beauty essence of Example 17 had excellent dispersion stability and had a uniform film with water resistance while having a fresh feel at the time of starting.

Example 18: Daytime emulsion (ingredients) (%)
1. 1. Polyoxyethylene sorbitan monooleate (20EO) 0.1
2.1,3-butylene glycol 12
3. 3. Methylparaben 0.1
4. Residual amount of purified water 5. Carbomer 0.6
6. Purified water 50
7. Ethanol 10
8. Dimethylsilylated silica (Note 1) 4
9. Polyhydroxystearic acid (Note 6) 0.1
10. Dimethicodiethylbenzalmalonate (Note 9) 4
11. 2-ethylhexyl paramethoxycinnamate 4
12. Di-2-ethylhexyl succinate 5
13. Decamethylcyclopentasiloxane 2
14. Isododecane 1
15.1,2-Hexanediol 0.05
16. Caprylyl glycol 0.05
17. Glyceryl caprylate 0.02
18. Tocopherol 0.005

(Production method)
A: The components (1) to (4) are uniformly heated and mixed at 70 ° C.
B: Ingredients (5) to (7) are uniformly heated and mixed at 70 ° C.
C: Ingredients (8) to (12) are dispersed and treated with a three-roll mill.
D: Ingredients (13) to (18) are uniformly heated and mixed at 70 ° C.
E: A and B are uniformly heated and mixed at 70 ° C.
F: C and D are uniformly heated and mixed at 70 ° C.
An oil-in-water cosmetic was obtained by adding F to G: E and emulsifying at 70 ° C.
(result)
The daytime beauty essence of Example 18 had excellent dispersion stability and had a uniform film with water resistance while having a fresh feel at the time of starting.

The present invention can be applied to cosmetics, quasi-drugs, external preparations for skin, and the like.

Claims (4)

The following components (a) to (c);
An oil-in-water cosmetic containing (a) dimethylsilylated silica and / or trimethylsilylated silica (b) polyhydroxystearic acid (c) dimethicodiethylbenzalmaronate. The oil-in-water cosmetic according to claim 1, wherein the average particle size of the component (a) is 1 to 50 nm. The oil-in-water cosmetic according to claim 1 or 2, wherein the content mass ratio (a) / (b) of the component (a) and the component (b) is 0.1 to 200. The oil-in-water cosmetic according to any one of claims 1 to 3, further comprising the component (d) a volatile oil agent.