JP2016030729A - Oil-in-water-in-oil emulsified emulsion cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-in-water-in-oil emulsified composition which exhibits storage stability, particularly excellent storage stability in a sudden temperature change.SOLUTION: This invention relates to an oil-in-water-in-oil emulsified composition obtained by dispersing an oil-in-water emulsified composition in an outer oil phase comprising a silicon oil, the an oil-in-water emulsified composition obtained by emulsifying an aqueous phase comprising an emulsifier and a higher alcohol, and an oil phase comprising a polysaccharide fatty acid ester.SELECTED DRAWING: None

Description

  The present invention provides an oil-in-water-in-oil emulsified composition having a fresh feeling of use and excellent in stability over time.

The oil-in-water emulsion composition in oil can impart a special feeling and functionality that cannot be obtained with an oil-in-water emulsion composition or a water-in-oil emulsion composition. However, it was very difficult to maintain the storage stability. For this reason, if a coating agent is blended in the outer oil phase while an attempt is made to improve stability by blending an organically modified clay mineral or an acrylic silicone-based coating agent in the outer oil phase, the elongation during use is heavy. There was a drawback. Moreover, in the general skin external preparation for ultraviolet protection, various ultraviolet absorbers are mix | blended. For example, diethylaminohydroxybenzoyl hexyl benzoate, which is a UVA absorber, has a problem that when it is blended with a low polarity oil such as silicone oil or hydrocarbon oil, crystals precipitate over time. In order to improve the compatibility of hexyl diethylaminohydroxybenzoyl benzoate, there is a problem that stickiness is caused when a large amount of a highly polar oil such as ethylhexyl methoxycinnamate is blended (Patent Documents 1 to 3).
Furthermore, UV protection cosmetics are products that are expected to be consumed from spring to summer. For this reason, UV protection cosmetics are mainly produced before spring and in winter. However, in the Japanese environment, it is often exposed to a harsh environment at the time of storage and transportation in a warehouse after manufacture, and there are cases where it is stored and transported in an environment close to 0 ° C. especially in winter. In addition, the main use is from spring to summer, and it can be easily guessed that customers are exposed to high-temperature environments during storage and transportation.
Therefore, it is necessary to combine the stability at low temperature and the stability at high temperature particularly in the ultraviolet protective cosmetic. However, in the conventional UV protection cosmetics, the stability observation is only for high temperature conditions such as 40 ° C. for 2 weeks (Patent Document 4), 50 ° C. (Patent Document 5), or 5 ° C. (Patent Document 6) only. The stability of the test in a cycle that repeats low and high temperatures was not sufficient.

Japanese Patent No. 4913487 Japanese Patent No. 4039542 Japanese Patent No. 4125463 JP 2001-192318 A JP-A-11-76799 JP 2011-207789 A

    An object of the present invention is to provide a water-in-oil-in-water emulsion composition that is stable even under severe conditions of repeated low and high temperatures.

    The present invention is obtained by dispersing an oil-in-water emulsion composition obtained by emulsifying an aqueous phase containing an emulsifier and a higher alcohol and an oil phase containing a polysaccharide fatty acid ester in an outer oil phase containing a silicone oil. An oil-in-oil-in-water emulsion composition is provided.

  The present invention exhibits an effect that an oil-in-water-in-oil emulsified composition that is stable even under severe conditions of repeated low and high temperatures can be obtained.

  Hereinafter, modes for carrying out the present invention will be described.

  First, the oil-in-water emulsion serving as the inner phase will be described.

  The oil-in-water emulsion serving as the internal phase of the present invention is obtained by emulsifying an aqueous phase containing an emulsifier and a higher alcohol and an oil phase containing a polysaccharide fatty acid ester.

  The emulsifier to be blended in the oil-in-water emulsion serving as the internal phase of the present invention is not particularly limited as long as it can be usually used, but is preferably a hydrophilic emulsifier. Further, a nonionic surfactant is preferably used as an emulsifier, and an ester type or ether ester type nonionic surfactant is more preferable. Specifically, polyoxyethylene glycerin fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters And sucrose fatty acid esters.

Examples of polyoxyethylene glycerin fatty acid esters include polyoxyethylene (5) glyceryl monooleate, polyoxyethylene (10) glyceryl monooleate, polyoxyethylene (15) glyceryl monooleate, polyoxyethylene ( Examples thereof include 20) glyceryl monooleate, polyoxyethylene (5) glyceryl monostearate, polyoxyethylene (10) glyceryl monostearate, polyoxyethylene (15) glyceryl monostearate.

Examples of the polyoxyethylene sorbitan fatty acid esters include polyoxyethylene (2) sorbitan monolaurate, polyoxyethylene (20) sorbitan monopalmitate, polyoxyethylene (20) sorbitan monostearate, polyoxyethylene (20 ) Sorbitan tristearate, polyoxyethylene (6) sorbitan monostearate, polyoxyethylene (20) sorbitan monooleate, polyoxyethylene (20) sorbitan trioleate, polyoxyethylene (6) sorbitan Examples include monooleate, polyoxyethylene (60) sorbitan monooleate, polyoxyethylene (20) sorbitan monoisostearate It is.

Examples of polyoxyethylene sorbitol fatty acid esters include polyoxyethylene (20) sorbitol monolaurate, polyoxyethylene (6) sorbitol monopalmitate, polyoxyethylene (6) sorbitol hexastearate, polyoxyethylene (6 ) Sorbitol tetraoleate, polyoxyethylene (60) sorbitol tetraoleate and the like.

Examples of polyoxyethylene fatty acid esters include polyoxyethylene (6) monolaurate, polyoxyethylene (10) monolaurate, polyoxyethylene (30) monolaurate, polyoxyethylene (1) monostearate , Polyoxyethylene (2).) Monostearate, polyoxyethylene (4) monostearate, polyoxyethylene (10) monostearate, polyoxyethylene (25) monostearate, polyoxyethylene (40) monostearic acid ester, polyoxyethylene (45) monostearic acid ester, polyoxyethylene (55) monostearic acid ester, polyoxyethylene (2) monooleic acid ester, polyoxyethylene Emissions (6) monooleate, polyoxyethylene (10) monooleate and the like.

Examples of glycerin fatty acid esters include glycerin coconut oil fatty acid ester, glyceryl monomyristic acid ester, glyceryl monopalmitic acid ester, glyceryl monostearic acid ester, glyceryl monoisostearic acid ester, glyceryl monooleic acid ester, glycerin castor oil fatty acid ester, glycerin Examples include hardened castor oil fatty acid esters.

Polyglycerol fatty acid esters include diglycerol monolaurate, diglycerol monomyristic ester, diglycerol monopalmitate, diglycerol monostearate, diglycerol monoisostearate, diglycerol monooleate, hexa Glycerol monolaurate, hexaglycerol monomyristate, hexaglycerol monopalmitate, hexaglycerol monostearate, hexaglycerol monoisostearate, hexaglycerol monooleate, decaglycerol monolaurate, decaglycerol monomyristine Acid ester, decaglycerol monopalmitate, decaglycerol monostearate Esters, decaglycerol monoisostearate esters, decaglycerol monooleate and the like.

Sorbitan fatty acid esters include sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquistearate, sorbitan tristearate, sorbitan monoisostearate, sorbitan sesquiisostearate, sorbitan monoester Examples include oleate, sorbitan sesquioleate, sorbitan trioleate, and the like.

  Examples of the sucrose fatty acid ester include sucrose lauric acid monoester, sucrose myristic acid monoester, sucrose palmitic acid monoester, sucrose stearic acid monoester, sucrose oleic acid monoester, and the like.

  The emulsifier used for the oil-in-water emulsion used as the internal phase of the present invention is blended alone or in combination of two or more. In the oil-in-water emulsion composition of the present invention, it is preferable to use two or more emulsifiers having different hydrophilic and hydrophobic properties in combination from the viewpoint of emulsion stability.

  The blending amount of the emulsifier varies depending on the blending amount of the oil phase of the innermost phase to be used in combination, and is blended by 0.02 to 1 part by mass with respect to the oil phase 1. If the amount is less than 0.02 parts by mass, a stable oil-in-water emulsion may not be obtained.

  The higher alcohol blended in the oil-in-water emulsion serving as the internal phase of the present invention is a monohydric alcohol having 8 to 30 carbon atoms, which is a linear or branched, saturated or unsaturated hydrocarbon. Are used alone or in combination of two or more. Specifically, caprylyl alcohol, capryl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, hexyl decanol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, octyldodecanol, aralkyl alcohol, behenyl alcohol, carnervir alcohol, ceryl alcohol, etc. Is exemplified. Among these higher alcohols, one or more selected from cetyl alcohol, stearyl alcohol, aralkyl alcohol, and behenyl alcohol are preferably used, and behenyl alcohol is most preferable from the viewpoint of emulsion stability.

  The blending amount of the higher alcohol in the oil-in-water emulsion varies depending on the blending amounts of the emulsifier and the ester compound used in combination, but 0.3 to 5% by mass is appropriate based on the total amount of the oil-in-water emulsion. If the blending is less than 0.3% by mass, the stability of the oil-in-water emulsion may not be maintained. Even if it exceeds 5 mass%, further improvement of stability improvement effect is not recognized, and it is inefficient.

  It does not specifically limit as a polysaccharide fatty acid ester mix | blended with the oil-in-water emulsion used as the internal phase of this invention, 1 type is used individually or in combination of 2 or more types. Examples of such polysaccharide fatty acid esters include dextrin octoate, dextrin laurate, dextrin palmitate, dextrin myristate, dextrin stearate, inulin octoate, inulin laurate, inulin palmitate, inulin myristate, inulin stearate and the like. The

  The blending amount of the polysaccharide fatty acid ester in the oil-in-water emulsion varies depending on the blending amount of the oil phase component and the like, but is suitably 0.1 to 3% by mass with respect to the total amount of the oil-in-water emulsion. If it is less than 0.1% by mass, stability may not be maintained.

As the oil phase component of the oil-in-water emulsion serving as the internal phase of the present invention, it is preferable to blend hydrocarbon oil and ester oil.
The type of hydrocarbon oil used in the present invention is not particularly limited as long as it can be blended in an oil-in-water emulsion, and examples include α-olefin oligomers, squalane, liquid isoparaffin, liquid paraffin, and the like. One kind of oil can be used alone or in combination of two or more kinds.

  The ester oil used in the present invention refers to a liquid oily component obtained by a dehydration reaction between a fatty acid and an alcohol. The type of the ester oil is not particularly limited as long as it can be usually blended in an oil-in-water emulsion. Isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl oleate, ethyl linoleate, isopropyl linoleate, capryl Cetyl acid, hexyl laurate, decyl myristate, decyl oleate, oleyl oleate, isostearyl laurate, isotridecyl myristate, isocetyl myristate, isostearyl myristate, octyldodecyl myristate, 2-ethylhexyl palmitate, palmitic acid Isocetyl, isostearyl palmitate, 2-ethylhexyl stearate, isocetyl stearate, isodecyl oleate, octyl dodecyl oleate, octyl ricinoleate Sil, ethyl isostearate, isopropyl isostearate, cetyl 2-ethylhexanoate, cetostearyl 2-ethylhexanoate, hexyl isostearate, ethylene glycol dioctanoate, ethylene glycol dioleate, propylene glycol dicaprylate, di (capryl Capric acid) propylene glycol, propylene glycol dicaprate, propylene glycol dioleate, neopentyl glycol dicaprate, neopentyl glycol dioctanoate, glyceryl tricaprylate, glyceryl tri-2-ethylhexanoate, glyceryl tri (caprylate / caprate), Glyceryl triisopalmitate, glyceryl triisostearate, trimethylolpropane tri-2-ethylhexanoate, triisostearate Trimethylol propane acid, pentaerythritol tetra-2-ethylhexanoate, pentaerythritol tetraisostearate, octyldodecyl neopentanoate, isocetyl octoate, isostearyl octoate, 2-ethylhexyl isoperargonate, hexyldecyl dimethyloctanoate, dimethyl Octyldodecyl octoate, 2-ethylhexyl isopalmitate, isocetyl isostearate, isostearyl isostearate, octyldodecyl isostearate, lauryl lactate, myristyl lactate, cetyl lactate, octyl dodecyl lactate, triethyl citrate, acetyltriethyl citrate, citric acid Acetyl tributyl, trioctyl citrate, triisocetyl citrate, trioctyldodecyl citrate, di-2-succinate Ethylhexyl, isopropyl adipate, isobutyl adipate, dioctyl adipate, diethyl sebacate, diisopropyl sebacate, dioctyl sebacate, avocado oil, almond oil, olive oil, sesame oil, rice bran oil, safflower oil, soybean oil, corn oil, rapeseed Oil, persic oil, palm kernel oil, palm oil, castor oil, sunflower oil, grape seed oil, cotton seed oil, palm oil, meadowweed oil, jojoba oil, kukui nut oil, wheat germ oil, rice germ oil, evening primrose oil, Macadamia nut oil and the like are exemplified, and one of these ester oils can be used alone or in combination of two or more.

    By blending an oil-soluble ultraviolet absorber as the inner oil phase component of the oil-in-water emulsion serving as the inner phase of the present invention, it can be used as an external preparation for ultraviolet protection.

Examples of such oil-soluble ultraviolet absorbers include paraaminobenzoic acid (PABA) derivatives, cinnamic acid derivatives, benzophenone derivatives, salicylic acid derivatives, and preferably, ethyl hexyl paramethoxycinnamate that is liquid at room temperature and normal temperature. Preferably, one or more selected from solid hexyl diethylaminohydroxybenzoyl benzoate, dimethoxybenzylidenedioxoimidazolidinepropionate, and t-butylmethoxybenzoylmethane are used in combination, and further, paraomethoxy cinnamon Most preferably, ethylhexyl acid and diethylaminohydroxybenzoyl hexylbenzoate are used in combination.

  It is preferable not to add an emulsifier such as a surfactant as a component of the innermost oil phase of the oil-in-water emulsion of the present invention. This is because by adding an emulsifier to the inner oil phase, the affinity between the outermost oil phase and the innermost oil phase is increased, and the oil-in-water emulsion may be destroyed.

  The inner oil phase used in the oil-in-water emulsion serving as the inner phase of the present invention preferably contains no surfactant. When a surfactant is mixed in the inner oil phase, a fine emulsion may not be obtained or stability over time may become unstable.

  The oil-in-water emulsion serving as the inner phase of the present invention is obtained by emulsifying an aqueous phase containing an emulsifier and a higher alcohol and an oil phase containing a polysaccharide fatty acid ester. First, an aqueous phase containing an emulsifier and a higher alcohol is heated above the melting point of the higher alcohol and dispersed uniformly. On the other hand, the oil phase containing the polysaccharide fatty acid ester is heated to a high temperature and uniformly dissolved. A stable oil-in-water emulsion composition can be obtained by adding an oil phase to an aqueous phase in a high temperature state and uniformly emulsifying and then cooling. Furthermore, an oil-in-water emulsion having a desired concentration can be obtained by adding water to the obtained oil-in-water emulsion for dilution.

In the oil-in-water emulsion serving as the inner phase of the present invention, the mixing ratio of the water phase and the inner oil phase is a mass ratio, and the oil phase is preferably in the range of 0.1 to 1 with respect to the water phase 1. When the oil phase is less than 0.1 with respect to the aqueous phase, the stability may decrease. Moreover, when an oil phase is mix | blended exceeding 1, emulsification may become difficult.

  The oil-in-water emulsion serving as the inner phase of the present invention can be emulsified using a normal homogenizer and a disper without using a special emulsifier such as a colloid mill or a high-pressure homogenizer.

  The oil-in-water emulsion serving as the inner phase of the present invention can adjust a fine emulsion having an average particle diameter of 350 nm or less. Furthermore, by adding an aqueous component to the obtained oil-in-water emulsion composition and diluting it, an oil-in-water emulsion composition having a low viscosity of 10000 mPa · s or less and good stability over time can be obtained.

  The oil-in-water emulsion serving as the internal phase of the present invention preferably contains an acrylic acid-based water-soluble polymer for the purpose of adjusting the viscosity and feeling of use of the emulsion composition. Such an acrylic acid-based water-soluble polymer has an acrylic group structure and is not particularly limited. For example, polyacrylic acid and salts thereof, carbomer, (acrylates / alkyl acrylate (C10-30)) crosspolymer, acrylamide / acrylamide-2-methylpropanesulfonate copolymer, hydroxyethyl acrylate / acryloyldimethyltaurine salt Copolymer, acrylate / acryloyldimethyltaurine copolymer, acrylic acid amide / acrylic acid-2-methylpropanesulfonate copolymer, acryloyldimethyltaurate / vinylpyrrolidone copolymer, etc. Are used alone or in combination of two or more.

  Of these, one or two selected from (acrylates / alkyl acrylate (C10-30)) crosspolymer and acrylamide / acrylamide-2-methylpropanesulfonate copolymer are preferably used, and more preferably. Is preferably used in combination with an (acrylates / alkyl acrylate (C10-30)) crosspolymer and an acrylamide-acrylamide-2-methylpropanesulfonate copolymer.

  The oil-in-water emulsion composition of the present invention can be obtained by dispersing the oil-in-water emulsion described above in an outer oil phase containing silicone oil.

  Such silicone oil is not particularly limited. Specifically, chain polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, cyclic polysiloxanes such as decamethylpolysiloxane, dodecamethylpolysiloxane, and tetramethyltetrahydrogenpolysiloxane. Can be mentioned. Silicone oils can be used alone or in combination of two or more.

  The blending amount of the silicone oil in the present invention is appropriately determined according to the purpose and other blending components, and is not particularly limited.

  As a component of the outer oil phase, it is preferable not to contain hydrocarbon oils and ester oils. When the component of the outer oil phase and the component of the inner oil phase are the same, the coalescence of the emulsion occurs, and the stability over time may deteriorate.

  When the oil-in-water emulsion is dispersed in the outer oil phase containing silicone oil, it is dispersed using an emulsifier. As such an emulsifier, a silicone-based surfactant is preferable from the viewpoint of emulsion stability. Specifically, polyoxyalkylene-modified organopolysiloxane, long-chain alkyl-containing polyoxyalkylene-modified organopolysiloxane, polyglycerin-modified organopolysiloxane. Etc. Specifically, lauryl PEG-9 polydimethylsiloxyethyl dimethicone (KF-6038), PEG-9 polydimethylsiloxyethyl dimethicone (KF-6028), POE methylsiloxane / POP oleylmethylsiloxane / dimethylsiloxane copolymer (KF) -6026), PEG-3 dimethicone (KF-6015), silicone branched lauryl / triglycerin co-modified silicone (KF-6105) (all manufactured by Shin-Etsu Chemical Co., Ltd.), and the like.

  Fine particle titanium oxide and fine particle zinc oxide can be blended in the outer oil phase.

[Zinc oxide]
The zinc oxide used in the present invention is not particularly limited, and a wide range of zinc oxides commonly used in cosmetics can be mentioned. Preferably, it is more excellent in dispersibility, and for example, a surface treated by a known method can be used as necessary.

  As a surface treatment method, silicone treatment such as methylhydrogenpolysiloxane and methylpolysiloxane; fluorine treatment with perfluoroalkyl phosphate ester, perfluoroalcohol and the like; amino acid treatment with N-acylglutamic acid and the like; other, lecithin treatment; Metal soap treatment; fatty acid treatment; alkyl phosphate ester treatment and the like. Of these, zinc oxide subjected to silicone surface treatment is preferable.

  The silicone used for the surface treatment is not particularly limited, but for example, methylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexa Siloxane, octamethyltrisiloxane, tetradecamethylhexasiloxane, dimethylsiloxane-methyl (polyoxyethylene) siloxane-methyl (polyoxypropylene) siloxane copolymer, dimethylsiloxane-methyl (polyoxyethylene) siloxane copolymer, dimethyl Siloxane / methyl (polyoxypropylene) siloxane copolymer, dimethylsiloxane / methylcetyloxysiloxane copolymer, dimethylsiloxa - methyl stearoxysiloxane copolymer such as various silicone oils can be exemplified. Preferably, it is methyl hydrogen polysiloxane. The use of such a silicone-treated zinc oxide is excellent in water repellency, ultraviolet shielding property, transparency, adhesion, and dispersibility, and is useful for providing an excellent sunscreen cosmetic.

The amount of silicone used for the surface treatment of zinc oxide is usually about 1 to 20% by mass, preferably 2 to 14% by mass, more preferably 2 to 10% by mass, per 100% by mass of the silicon-treated zinc oxide. It is 2-5 mass% especially. The method for treating silicon oxide with zinc oxide is not particularly limited, and a conventionally known method can be selected as appropriate.

In general, the zinc oxide used in the present invention preferably has an average primary particle size of 40 nm or less, more preferably 30 nm or less. This is because when the average primary particle diameter greatly exceeds 40 nm, there is a tendency to cause white floating or white remaining. The lower limit of the average primary particle size is not particularly limited, but the smaller the particle size, the higher the cost. Therefore, in consideration of economy, it may be 5 nm or more, and preferably 10 nm or more.

In the present invention, the average primary particle diameter is not particularly limited and means the diameter of primary particles measured by a method generally used for zinc oxide and titanium dioxide, and specifically, a transmission electron microscope. From the photograph, it is obtained as an arithmetic average of the major axis and the minor axis of the particle.

The form of the particles is not particularly limited, and may be in the form of primary particles or an aggregated secondary aggregate. Further, the shape such as a spherical shape, an elliptical shape, and a crushed shape is not particularly limited.

In a more preferred embodiment of the silicone-treated zinc oxide in the present invention, the average primary particle size is 5 to 4.
0 nm dimethylhydrogenpolysiloxane-treated zinc oxide (1 to 5 mass% surface treatment).

[titanium dioxide]
As titanium dioxide used for this invention, what is normally used for cosmetics can be widely mentioned, without being restrict | limited in particular. The crystal form of titanium dioxide is not particularly limited, and may be any of anatase, rutile or brookite.
Preferably, the ultraviolet shielding power is higher, and examples thereof include those that have been subjected to a surface treatment in order to enhance the ultraviolet scattering effect. As such a surface treatment method, any treatment usually used in cosmetics can be used without any particular limitation. Examples of such treatment include a method of adsorbing fats and oils on the surface of titanium dioxide, Fatty acid treatment method in which titanium dioxide that has been esterified or etherified using a functional group such as a hydroxyl group is treated with a fatty acid. And metal soap treatment using zinc salt, silicone treatment using methylpolysiloxane or methylhydrogenpolysiloxane instead of fatty acid, and treatment with fluorine compound having perfluoroalkyl group instead of fatty acid It is done.

Further, titanium dioxide may be prepared in the form of fine particles in order to enhance the ultraviolet scattering effect. Although it does not restrict | limit as fine particle titanium dioxide, Preferably an average primary particle diameter is 30 nm or less, More preferably, a 20 nm or less thing can be mentioned. When the average primary particle diameter greatly exceeds 30 nm, it tends to cause white floating and white remaining. The lower limit of the average primary particle size is not particularly limited, but the smaller the particle size, the higher the cost. Therefore, in consideration of economy, it may be 5 nm or more, and preferably 10 nm or more.

  In addition, when mix | blending zinc oxide, it is preferable to mix | blend in 5-40 mass%. Moreover, when mix | blending titanium dioxide, it is preferable to mix | blend in 0.5-10 mass%.

  In the oil-in-water oil-in-water emulsion composition of the present invention, the blending ratio of the outer oil phase to the inner oil-in-water emulsion composition is 0. 5 to 2.0 parts by mass, preferably 0.8 to 1.4 parts by mass is preferable from the viewpoint of storage stability and usability.

  In the oil-in-water emulsion composition of the present invention, in addition to the above essential components and optional components, an aqueous component, a humectant, a dye, a surfactant, Ultraviolet absorbers, thickeners, cosmetic ingredients, fragrances, polymer substances, antibacterial and antifungal agents, alcohols, powders, scrub agents, biogenic ingredients, and the like can be appropriately blended.

  The oil-in-water emulsion composition of the present invention can be used, for example, in the form of a lotion, emulsion, or ointment.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the scope of the present invention is not limited thereby. The blending amount is mass% unless otherwise specified.

  First, the evaluation method of the prepared oil-in-water emulsion composition is demonstrated.

[Stability]
The prepared oil-in-water emulsion composition was filled in a mayonnaise bottle and allowed to stand for 6 months in a cycle thermostatic bath at -5 ° C for 24 hours and 40 ° C for 24 hours, and then the state was observed.
“○” indicates a uniform emulsified state
Somewhat slightly separated
`` × '' indicates what is separated
Each was evaluated.

[Measurement of viscosity]
The viscosity of the prepared oil-in-water emulsion composition was stored at 25 ° C. The measurement was performed at 2 and 6 rpm.

[Usage feeling]
The sensory evaluation specialization actually used, “There is no stickiness and the feeling is very good: ◎”. “There is no stickiness and it is a good feeling of use: ○”, “It is a feeling of use that a little stickiness is worrisome: Δ”. It was evaluated as “use feeling that worries about stickiness: x”.

The oil-in-water-in-oil type emulsion composition used as the Example and comparative example of this invention was prepared with the prescription shown below. The oil-in-water emulsion composition in oil was prepared as follows.
(A) The C phase and the D phase are each homogenized by heating and then mixed and emulsified.
(B) Add and dilute phase B to the emulsified composition obtained in (a).
(C) (b) was added to the mixed and homogenized phase A to obtain an oil-in-water oil-in-water emulsion composition.

  In addition, the oil-in-oil-in-oil emulsion composition obtained by first mixing the B phase and the C phase and emulsifying the D phase into the A phase in the production method had reduced stability. .

Claims (2)

  An oil-in-water solution obtained by dispersing an oil-in-water emulsion composition obtained by emulsifying an aqueous phase containing an emulsifier and a higher alcohol and an oil phase containing a polysaccharide fatty acid ester in an outer oil phase containing a silicone oil. Oil-type emulsion composition.   The innermost oil phase contains one or more selected from the group consisting of octyl paramethoxycinnamate, hexyl diethylaminohydroxybenzoyl benzoate, dimethoxybenzylidenedioxoimidazolidinepropionate, and t-butylmethoxybenzoylmethane The oil-in-water oil-in-water emulsion composition according to claim 1.