Oil-in-water emulsion

Abstract

To provide an oil-in-water emulsion composition in which absorbance can be improved even if silicone elastomer is blended.SOLUTION: An oil-in-water emulsion composition contains (A) dimethicodiethylbenzalmalonate, (B) silicone elastomer, (C) surfactant of HLB8 or less having the carbon number 4 or more of hydrocarbon group in a dimethicone main chain.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an oil-in-water emulsion composition. [Background technology]

[0002] Oil-in-water emulsion compositions provide a refreshing and moist feel when applied to the skin, and are therefore widely used as bases for skin care products that are applied directly to the skin. In particular, silicone elastomers are blended into oil-in-water emulsion compositions, as they have the effect of reducing stickiness and squeaking of the skin after application and softening the skin (e.g., Patent Documents 1 and 2).

[0003] Dimethico diethyl benzal malonate is a type of ultraviolet absorber in the UV-B region (ultraviolet-B: 280 to 320 nm), but compared with other ultraviolet absorbers, it has a low ultraviolet protection ability, and when aiming for a high SPF (sun protection factor) product by increasing its blending amount, it has problems such as squeaking and oiliness due to the high blending amount. In view of such problems, Patent Document 3 describes that by blending a sunscreen cosmetic containing a combination of dimethico diethyl benzal malonate and 2,2'-methylene bis [6- (2H-benzotriazol-2-yl) -4- (1,1,3,3-tetramethylbutyl) phenol] with a glycerin modified at both ends with a specific structure, an excellent feeling of use can be obtained even when a product with a high SPF is manufactured. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2013 / 047196 [Patent Document 2] Patent No. 5588164 [Patent Document 3] Patent No. 5469319 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] It is generally known that the incorporation of silicone elastomers reduces the absorbance. Recently, when a specific surfactant was used to disperse silicone elastomers, the absorbance improved dramatically, and when dimethicodimethylbenzalmalonate was further added to the dispersion, the absorbance improved synergistically, leading to the present invention.

[0006] That is, the present invention was made based on the above findings, and an object of the present invention is to provide an oil-in-water emulsion composition that is capable of improving absorbance even when a silicone elastomer is blended therein. [Means for solving the problem]

[0007] The oil-in-water emulsion composition of the present invention comprises: (A) dimethicone diethyl benzalmalonate, (B) a silicone elastomer; (C) a surfactant having an HLB of 8 or less and a hydrocarbon group having 4 or more carbon atoms in the dimethicone main chain; It includes.

[0008] The oil-in-water emulsion composition of the present invention preferably contains (D) an oil-soluble UV absorber other than (A) dimethicodiethyl benzalmalonate in an amount of 8% by mass or more based on the total amount of the composition.

[0009] The mass ratio of the silicone elastomer (B) to the surfactant (C) having a hydrocarbon group having 4 or more carbon atoms in its dimethicone main chain and an HLB value of 8 or less is preferably 0.5-10.

[0010] The mass ratio of the silicone elastomer (B) to the dimethico diethyl benzal malonate (A) is preferably 0.1-2. Effect of the Invention

[0011] The oil-in-water emulsion composition of the present invention comprises: (A) dimethicone diethyl benzalmalonate, (B) a silicone elastomer; (C) A surfactant having an HLB value of 8 or less and a hydrocarbon group having 4 or more carbon atoms in the dimethicone main chain, so that the absorbance can be improved even when a silicone elastomer is blended. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The present invention will be described in detail below. The oil-in-water emulsion composition of the present invention comprises: (A) dimethicone diethyl benzalmalonate, (B) a silicone elastomer; (C) a surfactant having an HLB of 8 or less and a hydrocarbon group having 4 or more carbon atoms in the dimethicone main chain; It includes. Each component will be described in detail below. In the following, POE is an abbreviation for polyoxyethylene, PEG is an abbreviation for polyethylene glycol, and PPG is an abbreviation for polypropylene glycol.

[0013] (A) Dimethicone diethyl benzalmalonate The dimethicodimethyi benzalmalonate contained in the oil-in-water emulsion composition of the present invention is a silicone-modified compound that is liquid at room temperature, and is also called polysilicone-15. (A) Dimethicodimethyi benzalmalonate is a known ultraviolet absorbent, and a commercially available product can be used, for example, "PARSOL SLX" (DSM Nutritional Products). The mechanism of action by which the incorporation of (A) Dimethicodimethyi benzalmalonate further synergistically improves the absorbance is not necessarily clear, but it is believed that the decrease in absorbance caused by (B) silicone elastomer can be suppressed by (A) Dimethicodimethyi benzalmalonate entering the molecular holes constituting (B) silicone elastomer, which will be described later.

[0014] The blending amount of (A) dimethicodiethyl benzalmalonate is preferably 0.1 to 10% by mass, more preferably 0.3 to 8% by mass, and further preferably 0.5 to 5% by mass, based on the total amount of the composition. By blending it at 0.1% by mass or more based on the total amount of the composition, the absorbance can be further improved, and by blending it at 10% by mass or less, better usability can be ensured.

[0015] (B) Silicone elastomer The silicone elastomer (crosslinked silicone) contained in the oil-in-water emulsion composition of the present invention is not particularly limited, but one or more types selected from the group consisting of dimethicone crosspolymer, dimethicone / vinyl dimethicone crosspolymer (polysilicone 11), dimethicone / phenylvinyl dimethicone crosspolymer, vinyl dimethicone / lauryl dimethicone crosspolymer, lauryl polydimethylsiloxyethyl dimethicone / bis-vinyl dimethicone crosspolymer, alkyl (C30-45) cetearyl dimethicone crosspolymer, and cetearyl dimethicone crosspolymer are preferably used.

[0016] When preparing the oil-in-water emulsion composition of the present invention, it is preferable to incorporate the silicone elastomer in the form of a swollen product swollen with an oil that is liquid at room temperature, which further improves the dispersibility and stability of the crosslinked silicone. Examples of liquid oils used for swelling include liquid silicone oils, liquid hydrocarbon oils, liquid ester oils, and liquid higher fatty acids, and liquid oils having a low viscosity at room temperature (25°C), for example, 100 mPa s or less, are particularly preferred. The preferred viscosity range is 1 to 100 mPa s. In the liquid oil swelling of the silicone elastomer, which is a preferred blending form, the mixing ratio of the crosslinked silicone and the liquid oil is preferably 5:95 to 40:60 by mass. When the liquid oil swelling is in this mass ratio range, the preparation of the oil-in-water emulsion composition becomes more suitable.

[0017] As the liquid oil swollen product of silicone elastomer, commercially available products can be used. Examples of commercially available products include the following: Examples of dimethicone crosspolymer swelling products include 9040 silicone elastomer blend (a mixture of dimethicone crosspolymer and decamethylcyclopentasiloxane; 12% crosslinked), 9041 silicone elastomer blend (a mixture of dimethicone crosspolymer and dimethicone 5 mPa s; 16% crosslinked), 9045 silicone elastomer blend (a mixture of dimethicone crosspolymer and decamethylcyclopentasiloxane; 12.5% ​​crosslinked), and EL-8040ID silicone organic blend (a mixture of dimethicone crosspolymer and isododecane; 16% crosslinked) (all manufactured by Dow Corning Toray Co., Ltd.).

[0018] The swelling products of dimethicone / vinyl dimethicone crosspolymer include KSG-15 (a mixture of (dimethicone / vinyl dimethicone) crosspolymer and cyclopentasiloxane, with 4-10% crosslinked product), KSG-16 (a mixture of (dimethicone / vinyl dimethicone) crosspolymer and dimethicone 6 mPa·s, with 20-30% crosslinked product), KSG-1610 (a mixture of (dimethicone / vinyl dimethicone) crosspolymer and methyl trimethicone, with 15-20% crosslinked product) (all manufactured by Shin-Etsu Chemical Co., Ltd.), GRANSIL GCM (a mixture of polysilicone-11 and octamethylcyclotetrasiloxane, with approximately 6% crosslinked product), GRANSIL GCM-5 (a mixture of polysilicone-11 and decamethylcyclopentasiloxane, with approximately 6% crosslinked product), GR ANSIL IDS (a mixture of polysilicone-11 and isodecan, with approximately 7% crosslinked product), GRANSIL Examples include GRANSIL DMG-3 (a mixture of polysilicone-11 and dimethicone at 3 mPa·s; cross-linked product is approximately 12%), GRANSIL DMG-6 (a mixture of polysilicone-11 and dimethicone at 6 mPa·s; cross-linked product is approximately 18%), GRANSIL DMG-20 (a mixture of polysilicone-11 and dimethicone at 20 mPa·s; cross-linked product is approximately 25%), GRANSIL DMG-50 (a mixture of polysilicone-11 and dimethicone at 50 mPa·s; cross-linked product is approximately 26%), GRA NSIL PM (a mixture of polysilicone-11 and phenyl trimethicone; cross-linked product is approximately 20%), and GRANSIL ININ (a mixture of polysilicone-11 and isononyl isononanoate; cross-linked product is approximately 15%) (all manufactured by Grant).

[0019] Examples of swollen dimethicone / phenylvinyldimethicone crosspolymers include KSG-18A (a mixture of dimethicone / phenylvinyldimethicone crosspolymer and diphenylsiloxyphenyltrimethicone, with 10 to 20% crosslinked product) (manufactured by Shin-Etsu Chemical Co., Ltd.).

[0020] Examples of swollen vinyl dimethicone / lauryl dimethicone crosspolymers include KSG-41 ((vinyl dimethicone / lauryl dimethicone) crosspolymer, a mixture of mineral oils, crosslinked product is 25-30%), KSG-42 ((vinyl dimethicone / lauryl dimethicone) crosspolymer, a mixture of isododecane, crosslinked product is 20-30%), KSG-43 ((vinyl dimethicone / lauryl dimethicone) crosspolymer, a mixture of trioctanoin, crosslinked product is 25-35%), and KSG-44 ((vinyl dimethicone / lauryl dimethicone) crosspolymer, a mixture of squalane, crosslinked product is 25-35%) (all manufactured by Shin-Etsu Chemical Co., Ltd.).

[0021] Examples of swollen alkyl (C30-45) cetearyl dimethicone crosspolymer include VELVESIL 125 (a mixture of alkyl (C30-45) cetearyl dimethicone crosspolymer and cyclopentasiloxane; crosslinked amount is approximately 12.5%) and VELVESIL Plus (a mixture of alkyl (C30-45) cetearyl dimethicone crosspolymer, cyclopentasiloxane, and PEG / PPG-20 / 23 dimethicone 5 mPa s; crosslinked amount is approximately 20%) (both manufactured by Momentive Performance Materials).

[0022] Examples of swollen cetearyl dimethicone crosspolymers include VELVESIL DM (a mixture of cetearyl dimethicone crosspolymer and dimethicone 5 mPa·s, with approximately 17% crosslinked material) (manufactured by Momentive Performance Materials). Examples of mixtures of partially crosslinked polyether modified silicone and dimethyl polysiloxane include KSG-210 (20-30% solids), mixtures of cyclic fluorine-containing silicones such as fluoroalkyl group-containing cyclic organopolysiloxanes include KSG-51 (15-25% solids), and mixtures of partially crosslinked polyglycerin modified silicone and dimethyl polysiloxane include KSG-710 (20-25% solids) (all manufactured by Shin-Etsu Chemical Co., Ltd.).

[0023] Examples of alkyl group-containing crosslinked polyether-modified silicones include mineral oil·PEG-15 lauryl dimethicone crosspolymer ("KSG-310"; manufactured by Shin-Etsu Chemical Co., Ltd.), isododecane·PEG-15 lauryl dimethicone crosspolymer ("KSG-320"; manufactured by Shin-Etsu Chemical Co., Ltd.), trioctanoin·PEG-15 lauryl dimethicone crosspolymer ("KSG-330"; manufactured by Shin-Etsu Chemical Co., Ltd.), squalane·PEG-15 lauryl dimethicone crosspolymer·PEG-10 lauryl dimethicone crosspolymer ("KSG-340"; manufactured by Shin-Etsu Chemical Co., Ltd.), dimethicone·(PEG-15 / lauryl polydimethylsiloxyethyl dimethicone ("KSG360Z"; manufactured by Shin-Etsu Chemical Co., Ltd.), and the like.

[0024] Examples of alkyl group-containing crosslinked polyglycerin modified silicones include mineral oil (lauryl dimethicone / polyglycerin 3) crosspolymer ("KSG-810"; manufactured by Shin-Etsu Chemical Co., Ltd.), isododecane (lauryl dimethicone / polyglycerin 3) crosspolymer ("KSG-820"; manufactured by Shin-Etsu Chemical Co., Ltd.), trioctanoin (lauryl dimethicone / polyglycerin 3) crosspolymer ("KSG-830"; manufactured by Shin-Etsu Chemical Co., Ltd.), and squalane (lauryl dimethicone / polyglycerin 3) crosspolymer ("KSG-840"; manufactured by Shin-Etsu Chemical Co., Ltd.).

[0025] The amount of silicone elastomer is preferably 0.1 to 10% by mass, more preferably 1 to 8% by mass, and even more preferably 2 to 7% by mass, based on the total amount of the composition. When the amount is 0.1% by mass or more, the effect of reducing stickiness and squeaking of the skin after application and softening the skin can be obtained, and when the amount is 10% by mass or less, the stability of the composition can be further ensured.

[0026] The mass ratio of the silicone elastomer (B) to the dimethico diethyl benzal malonate (A) (component (B) / component (A)) is preferably 0.1 to 2, more preferably 0.12 to 1.95, and even more preferably 0.15 to 1.8. A mass ratio (B) / (A) of 0.1 or more results in a smoother, less sticky texture, and a mass ratio of 2 or less can further improve the absorbance.

[0027] (C) Surfactants with HLB of 8 or less that have a hydrocarbon group with 4 or more carbon atoms in the dimethicone main chain Suitable examples of the surfactant (C) having a hydrocarbon group of 4 or more carbon atoms in the dimethicone main chain and an HLB value of 8 or less (hereinafter simply referred to as component (C)) contained in the oil-in-water emulsion composition of the present invention include alkyl group-containing polyether-modified silicone, alkyl group-containing polyglycerin-modified silicone, etc. The mechanism by which the incorporation of component (C) dramatically improves absorbance is not entirely clear, but it is believed to be related to the improved dispersion of silicone elastomer (B).

[0028] Examples of alkyl group-containing polyether modified silicones include lauryl PEG-9 polydimethylsiloxyethyl dimethicone: silicone SC0928SL (manufactured by Shin-Etsu Chemical Co., Ltd.) and cetyl PEG / PPG-10 / 1 dimethicone: ABIL EM180 (manufactured by Goldschmidt).

[0029] Examples of alkyl group-containing polyglycerin-modified silicones include lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone ("KF-6105" manufactured by Shin-Etsu Chemical Co., Ltd.) and bis-butyl dimethicone polyglyceryl-3 (commercially available silicone KF-6109 manufactured by Shin-Etsu Chemical Co., Ltd.).

[0030] The blending amount of component (C) is preferably 0.01 to 1 mass% of the total amount of the composition, more preferably 0.03 to 0.9 mass%, and further preferably 0.05 to 0.8 mass%. When the blending amount is 0.01 mass% or more, the absorbance can be further improved, and when it is 1 mass% or less, the stickiness can be further reduced.

[0031] The mass ratio of the silicone elastomer (B) to the component (C) (component (B) / component (C)) is preferably 0.5 to 10, more preferably 0.55 to 9, and even more preferably 0.6 to 8. When the mass ratio (B) / (C) is 0.5 or more, stickiness can be further reduced, and when it is 10 or less, absorbance can be further improved.

[0032] (D) Oil-soluble UV absorbers The oil-soluble UV absorbent is not particularly limited as long as it is one that has been used in cosmetics. For example, methoxycinnamic acid derivatives, salicylic acid derivatives, benzoyl derivatives, camphor derivatives, para-aminobenzoic acid derivatives, triazine derivatives, β,β-diphenyl acrylate derivatives and benzophenone derivatives can be mentioned. The oil-soluble UV absorbent can be blended in one type or a combination of two or more types as required.

[0033] Examples of methoxycinnamic acid derivatives include octyl methoxycinnamate or ethylhexyl methoxycinnamate (e.g., Parsol MCX; Hoffmann-La Roche), isopropyl methoxycinnamate, isoamyl methoxycinnamate (e.g., Neo-Heliopan E1000; Herman & Reimer), cinnoxate, DEA methoxycinnamate, diisopropyl methylcinnamate, glyceryl-ethylhexanoate-dimethoxycinnamate, and di-(2-ethylhexyl)-4'-methoxybenzalmalonate.

[0034] Examples of salicylic acid derivatives include homosalate (Eusolex HMS; Rona / EM Industries), ethylhexyl salicylate (octyl salicylate, e.g., NeoHeliopan OS; Herman & Reimer), dipropylene glycol salicylate (Dipsal; Skel), and TEA salicylate (NeoHeliopan TS; Herman & Reimer).

[0035] An example of a benzoyl derivative is 4-tert-butyl-4'-methoxydibenzoylmethane (eg, Parsol 1789).

[0036] Examples of camphor derivatives include terephthalidene-3,3'-dicamphor-10,10'-disulfonate, 4-methylbenzylidenecamphor, and the like.

[0037] Examples of para-aminobenzoic acid derivatives include ethyl para-aminobenzoate (PABA), ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA (e.g., "Escarol 507"; ISP), glyceryl PABA, PEG-25-PABA (e.g., "Uvinal P25"; BASF), and diethylaminohydroxybenzoylhexyl benzoate (e.g., "Uvinal A Plus").

[0038] Examples of triazine derivatives include bisethylhexyloxyphenol methoxyphenyl triazine (e.g., "Tinosorb S"; Ciba Specialty Chemicals), ethylhexyl triazone (e.g., "Uvinal T150"; BASF), diethylhexylbutamido triazone (e.g., "Uvasorb HEB"; Sigma 3 V), 2,4,6-tris(diisobutyl-4'-aminobenzalmalonate)-s-triazine, and 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine.

[0039] Examples of β,β-diphenylacrylate derivatives include octocrylene (eg, "Uvinal N539T"; BASF).

[0040] Examples of benzophenone derivatives include benzophenone-1 (e.g., "Uvinal 400"; BASF), benzophenone-2 (e.g., "Uvinal D50"; BASF), benzophenone-3 or oxybenzone (e.g., "Uvinal M40"; BASF), benzophenone-4 (e.g., "Uvinal MS40"; BASF), benzophenone-5, benzophenone-6 (e.g., "Helisorb 11"; Norquay), benzophenone-8 (e.g., "Spectra-Sorb UV-24"; American Cyanamid), benzophenone-9 (e.g., "Uvinal DS-49"; BASF), and benzophenone-12.

[0041] In the present invention, the blending amount of the oil-soluble ultraviolet absorber (D) is preferably 8% by mass or more, more preferably 9 to 20% by mass, and further preferably 10 to 18% by mass, based on the total amount of the composition. Since the blending amount of the oil-soluble ultraviolet absorber (D) is 8% by mass or more, based on the total amount of the composition, the ultraviolet protection ability can be further improved.

[0042] The oil-in-water emulsion composition of the present invention can contain other optional components that can be added to ordinary cosmetics and quasi-drugs, so long as the effects of the present invention are not impaired. Examples of the optional components include, but are not limited to, oils such as liquid oils and fats, solid oils and fats, waxes, hydrocarbon oils, higher fatty acids, synthetic ester oils, and silicone oils, powder components, colorants, moisturizers, aqueous thickeners, dispersants, preservatives, fragrances, and various drugs.

[0043] Examples of liquid oils and fats include avocado oil, camellia oil, macadamia nut oil, corn oil, olive oil, rapeseed oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, germ oil, and triglycerin.

[0044] Examples of solid fats and oils include cacao butter, coconut oil, hardened coconut oil, palm oil, palm kernel oil, Japan wax kernel oil, hardened oil, Japan wax, and hardened castor oil.

[0045] Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, montan wax, rice bran wax, kapok wax, sugarcane wax, hexyl laurate, jojoba wax, shellac wax, and POE cholesterol ether.

[0046] Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, and hydrogenated polydecene.

[0047] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tallic acid, isostearic acid, linoleic acid, linoleic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

[0048] Synthetic ester oils include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, triisostearate trimethylolpropane triisostearate, and triisostearate trimethylolpropane triisostearate. Methylolpropane, pentaerythritol tetra-2-ethylhexanoate, glycerin tri-2-ethylhexanoate, glycerin trioctanoate, glycerin triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, tri-2-heptylundecanoate glyceride, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-heptyl palmitate xyldecyl, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, and the like.

[0049] Examples of silicone oils include chain polysiloxanes (e.g., dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxanes (e.g., octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc.), silicone resins forming a three-dimensional network structure, silicone rubber, various modified polysiloxanes (amino-modified polysiloxanes, polyether-modified polysiloxanes, alkyl-modified polysiloxanes, fluorine-modified polysiloxanes, etc.), and the like. The above oils may be used alone or in appropriate combination of two or more.

[0050] Examples of the powder component include ultraviolet scattering agents such as zinc oxide and titanium oxide, extender pigments such as talc, mica and kaolin, and polymer powders such as polyethylene powder, polymethyl methacrylate powder and nylon powder.

[0051] Examples of the moisturizing agent include polyhydric alcohols such as glycerin, 1,3-butylene glycol, dipropylene glycol, and propylene glycol, and water-soluble polymers such as trehalose, hyaluronic acid, and chondroitin sulfate.

[0052] Examples of aqueous thickeners include succinoglycan, dimethylacrylamide / sodium acryloyldimethyltaurate crosspolymer, cellulose gum, carboxyvinyl polymer, xanthan gum, and hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer.

[0053] The oil-in-water emulsion composition of the present invention can be produced according to a conventional method for producing an oil-in-water emulsion composition (cosmetic), for example, by separately mixing the components constituting the oil phase and the components constituting the aqueous phase, and then adding the oil phase to the aqueous phase to emulsify.

[0054] The oil-in-water emulsion composition of the present invention can be provided as a cosmetic in various formulations, such as a liquid, emulsion, cream, gel, or Bavarian cream form. Furthermore, the oil-in-water emulsion composition of the present invention can be provided as a skin care cosmetic, a sunscreen cosmetic, a cosmetic containing a coloring agent, a foundation, a makeup base, or a BB cream. EXAMPLES

[0055] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto. All blend amounts are in mass % unless otherwise specified.

[0056] (Examples 1 to 3 and Comparative Examples 1 to 3) Oil-in-water emulsion compositions were prepared according to the formulations shown in Table 1 below, and the prepared compositions were evaluated according to the following criteria.

[0057] (Peak top value) The composition (sample) of each example was applied at 2 mg / cm2 onto a measurement plate (S plate) (5 x 5 cm V-groove PMMA plate, SPFMASTER-PA01). 2 The amount of solution was dropped onto the plate, applied with a finger for 60 seconds, and dried for 15 minutes. The absorbance of the formed coating film was then measured using a Hitachi U-3500 self-recording spectrophotometer. An uncoated plate was used as a control, and the absorbance (Abs) was calculated using the following formula, with the maximum absorbance peak being the peak top value. Abs = -log(T / To) T: transmittance of sample, To: transmittance without coating

[0058] <Measurement of integrated absorbance (Abs) value> The composition (sample) of each example was applied at 2 mg / cm2 onto a measurement plate (S plate) (5 x 5 cm V-groove PMMA plate, SPFMASTER-PA01). 2 The amount of the solution was dropped onto the plate, applied with a finger for 60 seconds, and dried for 15 minutes, after which the absorbance of the formed coating film was measured using a Hitachi U-3500 model self-recording spectrophotometer. An uncoated plate was used as a control, and the absorbance (Abs) was calculated using the following formula, and the measured values ​​from 280 nm to 400 nm were integrated to obtain the integrated absorbance value. Abs = -log(T / To) T: transmittance of sample, To: transmittance without coating

[0059] The formulation and evaluation results are shown in Table 1. The commercial names of the main ingredients shown in the table are listed below. · (Acrylates / alkyl acrylate (C10-C30)) crosspolymer: PEMULEN TR-2 (manufactured by Lubrizol Advanced Materials, Inc.) · (Ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer: ARISTOFLEX HMB (manufactured by Clariant GMBH) Bis-butyl dimethicone polyglyceryl-3: Silicone KF-6109 (Shin-Etsu Chemical Co., Ltd.) Lauryl PEG-9 polydimethylsiloxyethyl dimethicone: Silicone SC0928SL (Shin-Etsu Chemical Co., Ltd.) Cetyl PEG / PPG-10 / 1 Dimethicone: ABIL EM180 (Goldschmidt) Lauryl betaine: Anon BL-SF (NOF Corporation) Polysilicone-11 / Dimethicone (3CS): Gransil DMG-3 (Grant Industries) Dimethicone diethyl benzalmalonate: Parsol SLX (manufactured by DSM Nutritional Products)

[0060] [Table 1]

[0061] As shown in Table 1, the oil-in-water emulsion compositions of the Examples had high absorbance peak top values ​​and integrated values ​​even though they contained a silicone elastomer. On the other hand, the absorbance peak top values ​​and integrated values ​​were significantly lower in Comparative Example 1, which did not contain component (C), and Comparative Examples 2 and 3, which did not contain dimethicodimethyi benzalmalonate (A). In particular, Comparative Example 3 did not reach the peak top value and integrated values ​​of the Examples even when the amount of octocrylene, which is most commonly used as being useful in sun care cosmetics, was increased.

Claims

1. (A) 0.1 to 10% by mass of dimethicodiethyl benzalmalonate, (B) 0.1 to 10% by mass of a silicone elastomer; (C) 0.01 to 10% by mass of a surfactant having a dimethicone main chain with a hydrocarbon group having 4 or more carbon atoms and an HLB value of 8 or less, Including, The surfactant (C) having a hydrocarbon group having 4 or more carbon atoms in a dimethicone main chain and an HLB of 8 or less is an alkyl group-containing polyether-modified silicone or an alkyl group-containing polyglycerin-modified silicone, The oil-in-water emulsion composition, wherein the mass ratio of the silicone elastomer (B) to the dimethico diethyl benzal malonate (A) is 0.1 to 2.

2. 2. The oil-in-water emulsion composition according to claim 1, comprising 8% by mass or more of the oil-soluble ultraviolet absorber (D) other than the dimethicodiethyl benzalmalonate (A) relative to the total amount of the composition.

3. 3. The oil-in-water emulsion composition according to claim 1, wherein a mass ratio of said silicone elastomer (B) to said surfactant (C) having a hydrocarbon group having 4 or more carbon atoms in its dimethicone main chain and an HLB of 8 or less is 0.5 to 10.

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