JP2006045133A - Oil-in-water type emulsion composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil-in-water type emulsion composition having aqueous solution-like physical properties, having a creamy touch when used, and capable of being rapidly harmonized with the skin without becoming sticky. <P>SOLUTION: This oil-in-water type emulsion composition contains (A) an aqueous phase, (B) an oil phase which contains a highly polar oil component having an IOB of ≥0.50 and is dispersed in the aqueous phase, (C) an amphiphilic substance, and (D) a hydrophilic surfactant, wherein the emulsion composition has an average emulsion particle diameter 0.01-0.15 μm. The highly polar oil component in the oil-in-water type emulsion composition preferably comprises a polyalkylene glycol dineopentanoate expressed by general formula (I) (m is an integer of 2-4; and n is an integer of 2-3). Further, the amphiphilic substance preferably comprises a higher alcohol having a chain length in number of carbon atoms of ≥16 and the hydrophilic surfactant preferably comprises an N-long-chain acyl acidic amino acid salt. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an oil-in-water emulsified composition, and particularly to an improvement in the feeling of use thereof.

Conventionally, various emulsion compositions have been widely used in the field of cosmetics and the like. Many of these emulsified compositions are creamy or cloudy emulsions, but transparent emulsified compositions with a reduced emulsified particle size have also been developed, without using a large amount of surfactant, ethanol, etc. In particular, it has been attracting attention as a technique for stably blending oil components (for example, JP-A-63-126542, JP-A-63-126543, JP-A-1-288330, etc.).
The above-mentioned emulsion composition is excellent in terms of stability and transparency, but various studies have been conducted in order to obtain more preferable usability. In other words, an oil-in-water emulsion composition has been developed which has a low viscosity in the container and has a liquid physical property that is easy to fill or take out, but has a soft cream-like feel when applied to the skin ( JP-A-6-271421).

This oil-in-water emulsified composition breaks down the gel structure formed in the aqueous phase by refining the emulsified particles, and transfers almost all of the amphiphile and surfactant to the emulsified particle interface. Thus, the viscosity is lowered. At the time of coating, the mechanical destruction of the emulsified particles occurs due to friction, and the surface area of the emulsified particle interface is reduced. As a result, the amphiphilic substance and the surfactant are released into the aqueous phase, and the amphiphilic substance-surfactant. -Rebuild the gel structure with water to give a creamy feel.
JP 63-126542 A JP 63-126543 A JP-A-1-288330 JP-A-6-271421

However, although the emulsified composition has a cream-like usability, there is a tendency that the feeling of use is slightly sticky and it takes time to adjust to the skin.
The present invention has been made in view of the above-mentioned problems of the prior art, and its object is to provide an oil-in-water emulsified composition having an aqueous solution-like property, having a cream-like feeling of use, and not quickly sticking to the skin. To provide things.

As a result of intensive studies conducted by the present inventors to achieve the above object, an oil-in-water emulsified composition that has a creamy feel and has a quick fit on the skin is obtained by adding a highly polar oil. As a result, the present invention was completed.
The oil-in-water emulsion composition of the present invention comprises (A) an aqueous phase,
(B) an oil phase containing a highly polar oil component having an IOB of 0.50 or more and dispersed in the water phase;
(C) an amphiphilic substance;
(D) a hydrophilic surfactant,
The average emulsified particle diameter is 0.01 to 0.15 μm.

（式中、ｍは２〜４の整数、ｎは２〜３の整数を表わす。）
前記水中油型乳化組成物において、両親媒性物質は、炭素鎖長が１６以上である高級アルコールであり、親水性界面活性剤は、Ｎ−長鎖アシル酸性アミノ酸塩であることが好適である。
前記水中油型乳化組成物において、高極性油分は、油相に対して１０質量％以下であることが好適である。
前記水中油型乳化組成物において、さらに水相に多価アルコールを含有することが好適である。 In the oil-in-water emulsion composition, the high polar oil content is preferably a dineopentanoic acid alkylene polyglycol represented by the following general formula (I).
(Chemical formula 1)

(In the formula, m represents an integer of 2 to 4, and n represents an integer of 2 to 3.)
In the oil-in-water emulsion composition, the amphiphilic substance is preferably a higher alcohol having a carbon chain length of 16 or more, and the hydrophilic surfactant is preferably an N-long chain acyl acidic amino acid salt. .
In the oil-in-water emulsion composition, the high polar oil content is preferably 10% by mass or less based on the oil phase.
In the oil-in-water emulsion composition, it is preferable that the water phase further contains a polyhydric alcohol.

  According to the present invention, by blending a highly polar oil together with an amphiphilic substance and a hydrophilic surfactant, it has aqueous solution-like properties, has a cream-like feel, and is familiar to the skin. An oil-in-water emulsion composition is obtained.

Hereinafter, the configuration of the present invention will be described in detail.
In the oil-in-water emulsion composition described in JP-A-6-271421 described above, the emulsion particles are mechanically broken by the rubbing action, and the gel structure is reconstructed in the aqueous phase. It is thought to be a touch. However, since the gel is reconstructed relatively quickly, the feeling of use tends to be sticky and the familiarity tends to be slow. Therefore, in the present invention, by adding a highly polar oil component, particularly an alkylene polyglycoline dineopentanoate, the gel reconstruction is delayed, and while having a cream-like feeling of use, it is extremely novel and feels comfortable to use. An oil-in-water emulsified composition was developed.

（式中、ｍは２〜４の整数、ｎは２〜３の整数を表わす。）
中でも、なじみの早さの点で、式中、ｍ＝３、ｎ＝３であるジネオペンタン酸トリプロピレングリコールを用いることが好適である。 <High polar oil content>
In the present invention, a highly polar oil component means an oil having an IOB (inorganic / organic) of 0.50 or more on an organic conceptual diagram (organic conceptual diagram; written by Yoshio Koda, Sankyo Publishing, 1984). Examples of such oils include dineopentanoic acid alkylene polyglycol represented by the following general formula (I).
(Chemical formula 2)

(In the formula, m represents an integer of 2 to 4, and n represents an integer of 2 to 3.)
Among them, it is preferable to use dineopentanoic acid tripropylene glycol in which m = 3 and n = 3 in terms of speed of familiarity.

In the oil-in-water emulsified composition of the present invention, the blending of a highly polar oil component can delay the restructuring of the gel that occurs at the time of rubbing, so that it has a creamy feel but is not sticky and familiar. It will be good.
In this invention, the compounding quantity of the high polar oil component whose IOB is 0.50 or more is 0.01-10 mass% normally with respect to the composition whole quantity, Preferably 0.1-1 mass% is mix | blended. If it is less than 0.1% by mass, the familiarity will be poor, and if it exceeds 10% by mass, a creamy feeling may not be obtained.
Moreover, it is preferable that the compounding quantity of a highly polar oil component is 10 mass% or less with respect to the whole oil phase. If it exceeds 10% by mass, a creamy feeling in use may not be obtained.

In the oil-in-water emulsion composition of the present invention, the oil phase may contain other oils such as liquid fats, solid fats, waxes, hydrocarbons, esters, silicones and the like.
Examples of liquid oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, southern castor oil, castor oil, linseed oil , Safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnagiri oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin and the like.
Examples of the solid fat include cacao butter, palm oil, horse fat, hydrogenated palm oil, palm oil, beef tallow, sheep fat, hydrogenated beef tallow, palm kernel oil, pork fat, beef bone fat, owl kernel oil, hydrogenated oil, cattle Leg fats, moles, hydrogenated castor oil and the like.

Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nuka wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugar cane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, Examples include jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, and POE hydrogenated lanolin alcohol ether.
Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, and the like.

  Examples of ester oils include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, lactic acid Myristyl, 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, trime triisostearate Roll propane, penta-2-ethylhexanoate pentaerythritol, glycerol tri-2-ethylhexanoate, glyceryl trioctanoate, glyceryl triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl Palmitate, glyceryl trimyristate, tri-2-heptylundecanoic acid 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-hexyldecyl palmitate, 2-hexyl adipate Decyl, diisopropyl sebacate, 2-ethylhexyl succinate, and triethyl citrate.

  Examples of the silicone oil include linear polysiloxanes (for example, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxanes (for example, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexyl). And silicone resins that form a three-dimensional network structure, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.) It is done.

<Hydrophilic surfactant>
Examples of hydrophilic surfactants that can be used in the present invention include N-long chain acyl acidic amino acid salts, higher fatty acid soaps, sucrose fatty acid esters, polyoxyalkylene alkyl ethers, mono fatty acid polyoxyethylene glycerin, polyoxyethylene cured Castor oil, and the like, preferably N-long chain acyl acidic amino acid salt, higher fatty acid soap, sucrose fatty acid ester, polyoxyalkylene alkyl ether, N-long chain acyl acidic amino acid salt is stable, feeling of use Etc., and is particularly preferable.

As the N-long chain acyl acidic amino acid salt, linear or branched, saturated or unsaturated, having 12 to 22, preferably 16 or more carbon atoms can be used. . Examples of such an acyl group include a stearoyl group, a palmitoyl group, a myristoyl group, a lauroyl group, and a cocoyl group. Examples of acidic amino acids include glutamic acid and aspartic acid. Examples of the salt include sodium, potassium, triethanolamine and the like. Preferred examples include sodium N-lauroyl glutamate, potassium N-lauroyl glutamate, sodium N-myristoyl glutamate, potassium N-myristoyl glutamate, sodium N-stearoyl glutamate, and potassium N-stearoyl glutamate. From the viewpoint of good use feeling, sodium N-stearoyl-L-glutamate is most preferable.
The N-long-chain acyl acidic amino acid salt changes in the form of water in the form of free (acidic) -monosalt-disalt depending on the neutralization rate (see JP-A-9-301847). ). Mono-salts are preferred because they are more stable than di-salts and the liquidity of the composition is weakly acidic. In the case of containing a di-salt, it is preferable that the molar ratio is 0.25 times or less, particularly 0.1 times or less, relative to the mono salt. Further, the free N-long chain acyl acidic amino acid can function as an amphiphilic substance described later.

  As the higher fatty acid soap, those whose higher fatty acid is a linear or branched, saturated or unsaturated fatty acid having 12 to 22 carbon atoms can be used. For example, palmitic acid, stearic acid, behenic acid and the like can be mentioned. Examples of the counter ion of the higher fatty acid soap include metal ions such as potassium ion and sodium ion.

  As the sucrose fatty acid ester, linear or branched, saturated or unsaturated fatty acid having 12 to 22 carbon atoms can be used. Preferably, the purity of the diester in the sucrose fatty acid ester is 50% or more, but when the monoester and the triester other than the diester are in the range of mono: tri = 1: 3 to 1:20, the diester The purity may be 35% or more. Such a high-purity diester can be obtained by purifying a commercially available sucrose fatty acid ester (mixture of mono-, di-, and tri-forms) by solvent fractionation, column chromatography or the like (see JP-A-7-25724). ).

Examples of the polyoxyalkylene alkyl ether include polyoxyethylene (POE) C12-22 alkyl ether, polyoxypropylene (POP) C12-22 alkyl ether, and the like. The POE addition mole number is preferably 10-30. Preferred examples include POE (15) oleyl ether.
As the mono fatty acid POE glycerin, the fatty acid is linear or branched, saturated or unsaturated, having 12 to 22 carbon atoms, and having an HLB value of 8 or more is preferable. Specific examples include polyoxyethylene glyceryl isostearate.

  In this invention, the compounding quantity of a hydrophilic surfactant is 0.01-10 mass% normally with respect to the composition whole quantity, Preferably 0.1-1 mass% is mix | blended. If it is less than 0.1% by mass, physical properties in the form of an aqueous solution may not be obtained, and if it exceeds 10% by mass, stickiness occurs.

<Amphiphile>
An amphiphilic substance has a surface activity, but itself has a strong hydrophobic property and does not have a surface activity as much as a general surfactant. Examples of amphiphilic substances that can be used in the present invention include higher aliphatic alcohols, higher fatty acids, monoglycerides, glycerol monoalkyl ethers, monoalkylamines, and sterols (such as cholesterol and phytosterols). Further, when the surfactant is an N-long chain acyl acidic amino acid salt, a free N-long chain acyl acidic amino acid can be used as an amphiphilic substance. Of these, preferred amphiphilic substances are higher aliphatic alcohols, higher fatty acids, and N-long chain acyl acidic amino acids, and particularly preferably higher aliphatic alcohols.

  The higher aliphatic alcohol and higher fatty acid are linear or branched, saturated or unsaturated, having 12 to 22 carbon atoms, particularly those having 16 or more carbon atoms. Higher aliphatic alcohols include linear higher aliphatic alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, cetostearyl alcohol; glyceryl monostearyl ether (batyl alcohol), glyceryl monocetyl ether (chymyl alcohol) Branched higher aliphatic alcohols such as) are preferred, and straight chain higher aliphatic alcohols are preferred.

Examples of the higher fatty acid include lauric acid, myristic acid, stearic acid, behenic acid (behenic acid), oleic acid, 12-hydroxystearic acid, undecylenic acid, toluic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid ( EPA) and docosahexaenoic acid (DHA).
In this invention, the compounding quantity of an amphiphile is 0.01-10 mass% normally with respect to the composition whole quantity, Preferably 0.1-1 mass% is mix | blended. If it is less than 0.1% by mass, physical properties in the form of an aqueous solution may not be obtained, and if it exceeds 10% by mass, stickiness occurs.

The oil phase component is preferably 50% by mass or more based on the total amount of the amphiphile and the surfactant. If the blending amount of the oil phase component is small, the amount of interfacial area of the emulsified particles is relatively small, and the stability of the emulsified composition may be remarkably deteriorated.
The total amount of the amphiphile and the surfactant is preferably 0.2% by mass or more, particularly 0.5% by mass or more, based on the aqueous phase. If it is less than 0.2% by mass, the cream-like feel during application may be impaired.

  In order for the oil-in-water emulsion composition of the present invention to have a cream-like feel during application, the surfactant and amphiphile used in the present invention are surfactant-amphiphile-water system. It is necessary to form a gel at least in the temperature range from the freezing point of the aqueous phase to room temperature. Therefore, the gel transition temperature is preferably 60 ° C. or higher. In general, the transition temperature of a gel formed of a surfactant-amphiphile-water system is about 10 to 20 ° C. higher than the temperature at which the gel does not form (begins to flow). When shown, it is considered that a gel can be formed at room temperature.

<Polyhydric alcohol>
It is preferable to add a polyhydric alcohol to the oil-in-water emulsion composition of the present invention because the emulsion particle diameter tends to be small.
Examples of the polyhydric alcohol include divalent alcohols (for example, ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, Pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, octylene glycol, etc.); trivalent alcohol (eg, glycerin, trimethylolpropane, etc.); tetravalent alcohol (eg, 1,2,6) Pentaerythritol such as hexanetriol); pentahydric alcohol (eg, xylitol, etc.); hexavalent alcohol (eg, sorbitol, mannitol, etc.); polyhydric alcohol polymer (eg, diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene Glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, polyglycerin, etc.); divalent alcohol alkyl ethers (for example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene) Glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono 2-methylhexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, etc.) ; Dihydric alcohol alkyl ester Tellurium (for example, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol butyl ether, diethylene glycol methyl ethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether , Propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol isopropyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol butyl ether, etc.); divalent alcohol Ether esters (eg, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol diazinate, ethylene glycol disuccinate, diethylene glycol monoethyl ether acetate, diethylene glycol) Monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, propylene glycol monophenyl ether acetate, etc .; glycerin monoalkyl ether (for example, xyl alcohol, ceralkyl alcohol) Sugar alcohol (for example, sorbitol, maltitol, maltotriose, mannitol, sucrose, erythritol, glucose, fructose, amylolytic sugar, maltose, xylitolose, amylolytic sugar reducing alcohol, etc.); Solid; Tetrahydrofurfuryl alcohol; POE-Tetrahydrofurfuryl alcohol; POP-Butyl ether; POP / POE-Butyl ether; Tripolyoxypropylene glycerin ether; POP-Glycerine ether; POP-Glycerine ether phosphate; POP / POE-Pentane erythritol Ether, polyglycerin and the like can be used. Particularly preferred are glycerin, 1,3-butylene glycol, and dipropylene glycol.

  In the present invention, the blending amount of the polyhydric alcohol is not particularly limited. If the amount is less than 1% by mass, the effect of adding a polyhydric alcohol cannot be sufficiently exerted, and even if the amount exceeds 20% by mass, an increase in the effect corresponding to the blending amount cannot be expected, and problems such as stickiness may occur. .

  The emulsified composition of the present invention is an emulsifier that can apply a shear force stronger than a homomixer to the mixed dispersion having the above essential components, such as manton gaulin, French press, colloid mill, microfluidizer, ultrasonic emulsifier, etc. By processing with a strong shearing force, the transparency, safety and stability can be improved. Further, when a high-pressure homogenizer such as Manton Gaurin, French press, or microfluidizer is used, emulsification is preferably performed under a pressure of 1000 psi or more, and more preferably 3000 psi or more. In the emulsification treatment according to the present invention, the entire amount of the system may be performed, or in some cases, a part thereof may be treated and then diluted with another compound such as water or a polyhydric alcohol. The temperature during emulsification is preferably higher than the transition temperature of the gel formed by the surfactant and amphiphile in the system together with water.

  By making the emulsion particle diameter fine by such an emulsification treatment, the emulsion stability is very good with low viscosity, and it has a cream-like feeling at the time of application, but it is extremely novel that does not stick quickly and stick. An oil-in-water emulsion composition having a feeling of use is obtained. The average emulsified particle size of the fragrance composition of the present invention is 0.01 to 0.15 μm, preferably 0.01 to 0.1 μm. If it exceeds 0.15 μm, creaming tends to occur.

In the present invention, other components to be blended in the system, such as powder components, other surfactants, humectants, water-soluble polymers, thickeners, film agents, ultraviolet absorbers, sequestering agents, lower alcohols , Sugars, amino acids, organic amines, polymer emulsions, pH adjusters, skin nutrients, vitamins, antioxidants, antioxidant aids, fragrances, etc., as necessary, can be produced by conventional methods .
Specific ingredients that can be blended are listed below, and the skin external preparation of the present invention can be prepared by blending the above essential blending ingredients and any one or more of the following ingredients.

  Examples of the powder component include inorganic powders (for example, talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, saucite, biotite, permiculite, magnesium carbonate, calcium carbonate, silicic acid. Aluminum, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, zeolite, barium sulfate, calcined calcium sulfate (baked gypsum), calcium phosphate, fluorine apatite, hydroxyapatite, ceramic powder , Metal soap (eg, zinc myristate, calcium palmitate, aluminum stearate), boron nitride, etc .; organic powder (eg, polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene Powder, copolymer resin powder of styrene and acrylic acid, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, etc.); inorganic white pigment (eg, titanium dioxide, zinc oxide, etc.); inorganic red pigment (eg, Iron oxide (Bengara), iron titanate, etc .; Inorganic brown pigments (eg, γ-iron oxide, etc.); Inorganic yellow pigments (eg, yellow iron oxide, loess, etc.); Inorganic black pigments (eg, black oxide) Iron, low-order titanium oxide, etc.); inorganic purple pigments (eg, mango violet, cobalt violet, etc.); inorganic green pigments (eg, chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigments (eg, Pearl pigments (eg titanium oxide coated mica, titanium oxide coated bismuth oxychloride, titanium oxide coated talc, colored oxidation) Tan-coated mica, bismuth oxychloride, fish scale foil, etc.); metal powder pigments (eg, aluminum powder, copper powder, etc.); organic pigments such as zirconium, barium or aluminum lake (eg, red 201, red 202, red 204) No., red 205, red 220, red 226, red 228, red 405, orange 203, orange 204, yellow 205, yellow 401, and blue 404, organic pigments such as red 3 , Red 104, Red 106, Red 227, Red 230, Red 401, Red 505, Orange 205, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Green 3 and Blue No. 1 etc.); natural pigments (for example, chlorophyll, β-carotene, etc.) and the like.

  Examples of other surfactants include anionic surfactants such as higher alkyl sulfates (eg, sodium lauryl sulfate, potassium lauryl sulfate); alkyl ether sulfates (eg, POE-lauryl sulfate triethanolamine). , POE-sodium lauryl sulfate, etc.); N-acyl sarcosine acids (eg, sodium lauroyl sarcosine, etc.); higher fatty acid amide sulfonates (eg, sodium N-myristoyl-N-methyl taurate, sodium palm oil fatty acid methyl tauride, Sodium lauryl methyl tauride, etc.); Phosphate ester salts (POE-oleyl ether sodium phosphate, POE-stearyl ether phosphate, etc.); Sulfosuccinate (eg, sodium di-2-ethylhexyl sulfosuccinate, monolauroyl monoethanol) Sodium amidopolyoxyethylene sulfosuccinate, sodium lauryl polypropylene glycol sulfosuccinate, etc.); alkylbenzene sulfonates (eg, sodium linear dodecyl benzene sulfonate, triethanolamine linear dodecyl benzene sulfonate, linear dodecyl benzene sulfonic acid, etc.); higher fatty acids Ester sulfate salt (for example, hydrogenated coconut oil fatty acid sodium glycerin sulfate); sulfated oil (for example, funnel oil); POE-alkyl ether carboxylic acid; POE-alkyl allyl ether carboxylate; α-olefin sulfonate Higher fatty acid ester sulfonates; secondary alcohol sulfates; higher fatty acid alkylolamide sulfates; sodium lauroyl monoethanolamide succinate; N-palmi Yl aspartate ditriethanolamine; sodium caseinate, and the like.

  Examples of the cationic surfactant include alkyltrimethylammonium salts (eg, stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); alkylpyridinium salts (eg, cetylpyridinium chloride, etc.); distearyldimethylammonium dialkyldimethylammonium chloride; Poly (N, N'-dimethyl-3,5-methylenepiperidinium chloride); alkyl quaternary ammonium salt; alkyldimethylbenzylammonium salt; alkylisoquinolinium salt; dialkyl morpholinium salt; POE-alkylamine; Examples include alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride; benzethonium chloride and the like.

  Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants (eg, 2-undecyl-N, N, N- (hydroxyethylcarboxymethyl) -2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide). Side-1-carboxyethyloxy disodium salt, etc.); betaine surfactants (for example, 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkylbetaine, amide betaine) , Sulfobetaine, etc.).

  Examples of the lipophilic nonionic surfactant include sorbitan fatty acid esters (for example, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, Sorbitan trioleate, diglycerol sorbitan penta-2-ethylhexylate, diglycerol sorbitan tetra-2-ethylhexylate); glycerin polyglycerin fatty acids (eg mono cottonseed oil fatty acid glycerin, monoerucic acid glycerin, sesquioleate glycerin, monostearin) Glycerin acid, α, α'-oleic acid pyroglutamate glycerin, monostearic acid glycerin malic acid, etc.); propylene glycol fatty acid esters (eg monostearies) Propylene glycolate, etc.); hardened castor oil derivative; glycerin alkyl ether, etc.

  Examples of hydrophilic nonionic surfactants include POE-sorbitan fatty acid esters (for example, POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate, etc.); POE sorbite fatty acid esters (eg, POE-sorbite monolaurate, POE-sorbite monooleate, POE-sorbite pentaoleate, POE-sorbite monostearate, etc.); POE-fatty acid esters (eg, POE-distearate, POE-monodiolate, ethylene glycol distearate, etc.); Pluronic type (for example, Pluronic, etc.); POE / POP-alkyl ethers (for example, POE / POP-cetyl ether, POE / POP-2-decyltetradecyl ether, POE)・ POP-monobutyl ether, POE / POP-hydrogenated lanolin, POE / POP-glyce Tetra-POE / tetra-POP-ethylenediamine condensates (for example, Tetronic); POE-beeswax / lanolin derivatives (for example, POE-sorbit beeswax); alkanolamides (for example, coconut oil fatty acid diethanolamide, laurin) Acid monoethanolamide, fatty acid isopropanolamide, etc.); POE-propylene glycol fatty acid ester; POE-alkylamine; POE-fatty acid amide; alkylethoxydimethylamine oxide; trioleyl phosphoric acid.

  Examples of the humectant include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate Sodium lactate, bile salt, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO) PO adduct, Izayoi rose extract, yarrow extract, merirot extract and the like.

  Examples of natural water-soluble polymers include plant-based polymers (for example, gum arabic, gum tragacanth, galactan, guar gum, carob gum, caraya gum, carrageenan, pectin, agar, quince seed (malmello), alge colloid (guckweed extract), starch (Rice, corn, potato, wheat), glycyrrhizic acid); microbial polymers (eg, xanthan gum, dextran, succinoglucan, bullulan, etc.); animal polymers (eg, collagen, casein, albumin, gelatin, etc.), etc. Is mentioned.

  Semi-synthetic water-soluble polymers include, for example, starch polymers (eg, carboxymethyl starch, methylhydroxypropyl starch, etc.); cellulose polymers (methylcellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate) Hydroxypropylcellulose, carboxymethylcellulose, sodium carboxymethylcellulose, crystalline cellulose, cellulose powder and the like); alginic acid polymers (for example, sodium alginate, propylene glycol alginate, etc.) and the like.

  Synthetic water-soluble polymers include, for example, vinyl polymers (eg, polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymer); polyoxyethylene polymers (eg, polyethylene glycol 20,000, 40,000, 60,000). Polyoxyethylene polyoxypropylene copolymer, etc.); acrylic polymers (for example, sodium polyacrylate, polyethyl acrylate, polyacrylamide, etc.); polyethyleneimine; cationic polymers, and the like.

  Examples of the thickener include gum arabic, carrageenan, caraya gum, gum tragacanth, carob gum, quince seed (malmello), casein, dextrin, gelatin, sodium pectate, sodium alginate, methylcellulose, ethylcellulose, CMC, hydroxyethylcellulose, hydroxypropyl Cellulose, PVA, PVM, PVP, sodium polyacrylate, carboxyvinyl polymer, locust bean gum, guar gum, tamarind gum, cellulose dialkyldimethylammonium sulfate, xanthan gum, magnesium aluminum silicate, bentonite, hectorite, silicate A1Mg (vee gum), Examples thereof include laponite and silicic anhydride.

  Examples of UV absorbers include benzoic acid UV absorbers (eg, paraaminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester. N, N-dimethyl PABA ethyl ester, N, N-dimethyl PABA butyl ester, N, N-dimethyl PABA ethyl ester, etc.); anthranilic acid-based ultraviolet absorbers (eg, homomenthyl-N-acetylanthranylate, etc.); Salicylic acid ultraviolet absorbers (for example, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, etc.); cinnamic acid ultraviolet absorbers (for example, octylcinnamate, ethyl- 4-isopropyl cinnamate, methyl -2,5-diisopropylcinnamate, ethyl-2,4-diisopropylcinnamate, methyl-2,4-diisopropylcinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl-p-methoxy Cinnamate, octyl-p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β-phenyl Cinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl-diparamethoxycinnamate, etc.); benzophenone UV absorbers (for example, 2,4-dihydroxybenzophenone, 2 , 2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2 , 2 ', 4,4'-Tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate 4-phenylbenzophenone, 2-ethylhexyl-4′-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone, etc.); 3- (4 ′ -Methylbenzylidene) -d, l-camphor, 3-benzylidene-d, l-camphor; 2-phenyl-5-methylbenzoxazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2- (2 '-Hydroxy-5'-t-octylphenyl) benzotriazole; 2- (2'-hydroxy-5'-methylphenylbenzotriazole; dibenzalazine; dianisoylmethane; 4-methoxy-4'-t-butyldibenzoyl Methane; 5- (3,3-dimethyl-2-norbornylidene) -3-pentan-2-one and the like.

Examples of the sequestering agent include 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, disodium edetate, trisodium edetate, and tetrasodium edetate. Sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, trisodium ethylenediaminehydroxyethyl triacetate and the like.
Examples of the lower alcohol include ethanol, propanol, isopropanol, isobutyl alcohol, t-butyl alcohol and the like.

  Monosaccharides include, for example, tricarbon sugars (eg, D-glyceryl aldehyde, dihydroxyacetone, etc.); tetracarbon sugars (eg, D-erythrose, D-erythrulose, D-treose, erythritol, etc.); pentose sugars (eg, , L-arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-ribulose, D-xylulose, L-xylulose, etc .; hexose (eg, D-glucose, D-talose, D) -Bucicose, D-galactose, D-fructose, L-galactose, L-mannose, D-tagatose, etc.); pentose sugar (eg, aldheptose, heproose, etc.); octose sugar (eg, octulose, etc.); For example, 2-deoxy-D-ribose, 6-deoxy-L-galactose, 6-deoxy-L-mannose, etc .; amino sugar (eg, D-glucosamine, D-galactosamine, shea Acid, Aminouron acid, muramic acid); uronic acid (e.g., D- glucuronic acid, D- mannuronic acid, L- guluronic acid, D- galacturonic acid, L- iduronic acid) and the like.

Examples of the oligosaccharides include sucrose, gnocyanose, umbelliferose, lactose, planteose, isoliquinoses, α, α-trehalose, raffinose, lycnose, umbilicin, stachyose verbusose and the like.
Examples of the polysaccharide include cellulose, quince seed, chondroitin sulfate, starch, galactan, dermatan sulfate, glycogen, gum arabic, heparan sulfate, hyaluronic acid, tragacanth gum, keratan sulfate, chondroitin, xanthan gum, mucoitin sulfate, guar gum, dextran, kerato sulfate. , Locust bean gum, succinoglucan, caronic acid and the like.

Examples of amino acids include neutral amino acids (eg, threonine, cysteine, etc.); basic amino acids (eg, hydroxylysine, etc.) and the like. Examples of amino acid derivatives include acyl sarcosine sodium (lauroyl sarcosine sodium), acyl glutamate, acyl β-alanine sodium, glutathione, and pyrrolidone carboxylic acid.
Examples of the organic amine include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol. Is mentioned.

Examples of the polymer emulsion include an acrylic resin emulsion, a polyethyl acrylate emulsion, an acrylic resin liquid, a polyacryl alkyl ester emulsion, a polyvinyl acetate resin emulsion, and a natural rubber latex.
Examples of the pH adjuster include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate.
Examples of vitamins include vitamins A, B1, B2, B6, C, E and derivatives thereof, pantothenic acid and derivatives thereof, biotin and the like.
Examples of the antioxidant include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters and the like.
Examples of the antioxidant assistant include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, kephalin, hexametaphosphate, phytic acid, and ethylenediaminetetraacetic acid.

Other ingredients that can be blended include, for example, preservatives (ethyl paraben, butyl paraben, etc.); anti-inflammatory agents (eg, glycyrrhizic acid derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc.); whitening agents (for example, Extract, placenta extract, saxifrage extract, arbutin, etc.); various extracts (eg, buckwheat, auren, shikon, peonies, assembly, birch, sage, loquat, carrot, aloe, mallow), iris, grape, yokuinin, loofah, lily , Saffron, nematode, ginger, hypericum, onionis, garlic, red pepper, chimney, red snapper, seaweed, etc.), activator (for example, royal jelly, photosensitizer, cholesterol derivative, etc.); blood circulation promoter (for example, nonenyl acid wallenylamide, nicotine) Acid Gyl ester, nicotinic acid β-butoxyethyl ester, capsaicin, gingerone, cantalis tincture, ictamol, tannic acid, α-borneol, nicotinic acid tocopherol, inositol hexanicotinate, cyclandrate, cinnarizine, trazoline, acetylcholine, verapamil, cephalanthin , Γ-oryzanol, etc.); antiseborrheic agents (eg, sulfur, thianthol, etc.); anti-inflammatory agents (eg, tranexamic acid, thiotaurine, hypotaurine, etc.) and the like.
EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not specifically limited by these. Unless otherwise specified, the blending amount indicates mass%.

<Sensory evaluation>
Based on the formulation in Table 1, an oil-in-water emulsion composition was produced and subjected to sensory evaluation. Evaluation methods and evaluation criteria are as follows.
Evaluation 1: Stickiness The oil-in-water emulsion composition of each test example was subjected to a sensory evaluation on the stickiness at the time of application using 10 professional cosmetic panels, and evaluated according to the following criteria.
◎: 8 or more out of 10 people judged not sticky ○: 6-7 out of 10 people judged not sticky △: 3-5 or more out of 10 people judged not sticky ×: out of 10 people Evaluation 2 judged that 2 or less people were not sticky 2: Familiarity to the skin About the oil-in-water emulsion composition of each test example, using 10 professional cosmetic panels, sensory evaluation was performed on familiarity with the skin at the time of application, Evaluation was made according to the following criteria.
A: 8 or more out of 10 people judged to be familiar. ○: 6 to 7 out of 10 people judged to be familiar. Δ: 3 to 5 or more out of 10 people judged to be familiar. ×: Less than 2 out of 10 people decided that they were familiar

(Table 1)
Test example
1 2 3 4 5
(1) Dineeopentanoic acid tripropylene glycol
(IOB: 0.52) 0.18 --- --- --- ---
(2) Dioctyl succinate
(IOB: 0.36) --- 0.18 --- --- ---
(3) Trioctanoin
(IOB: 0.32) --- --- 0.18 --- ---
(4) Cetyl octanoate
(IOB: 0.13) --- --- --- 0.18 ---
(5) Squalane
(IOB: 0) 1.2 1.2 1.2 0.38 1.2
(6) Dimethyl silicone
(IOB: 0) 2.22 2.22 2.22 2.22 2.22
(7) N-stearoyl-L-monosodium glutamate
0.36 0.36 0.36 0.36 0.36
(8) Behenyl alcohol 0.78 0.78 0.78 0.78 0.78
(9) Glycerin 7.4 7.4 7.4 7.4 7.4
(10) Dipropylene glycol 6.6 6.6 6.6 6.6 6.6
(11) L-arginine hydrochloride 0.05 0.05 0.05 0.05 0.05
(12) edetate trisodium 0.01 0.01 0.01 0.01 0.01
(13) Erythritol 0.5 0.5 0.5 0.5 0.5
(14) Polyethylene glycol 0.3 0.3 0.3 0.3 0.3
(15) Ethylparaben 0.06 0.06 0.06 0.06 0.06
(16) Methylparaben 0.15 0.15 0.15 0.15 0.15
(17) Ethanol 3.0 3.0 3.0 3.0 3.0
(18) Ion-exchanged water Residue Residue Residue Residual Residue Residue
Stickiness ◎ ○ ○ △ △
Skin familiarity ◎ ○ ○ △ △
(Manufacturing method and evaluation)
(1) to (8) are mixed with stirring at 80 ° C. This is added to a solution obtained by heating and dissolving the mixed solution of (9) to (16) at 80 ° C. while stirring and emulsified. The emulsion was emulsified using a high-pressure homogenizer at 75 ° C. under a pressure of 6000 psi, and then (17) to (18) were stirred and mixed to obtain a translucent low-viscosity lotion.

  From Table 1, it is confirmed that an oil-in-water emulsified composition having a cream-like feeling of use but having no stickiness and good fit to the skin is obtained when a high polar oil component having an IOB of 0.50 or more is blended. It was done.

<Changes in physical properties at the beginning of application>
A cream-like feeling of use can be obtained by restructuring the gel during application. However, if gelation occurs in the initial stage of application, it takes time until it becomes familiar with the skin, which is undesirable.
Each sample shown in Table 2 was manufactured, a load assuming the friction at the initial stage of application was applied, and the change in physical properties at the initial stage of application was examined by measuring changes in the emulsified particle diameter and endothermic peak temperature. If the endothermic peak shifts to the high temperature side after loading, it is expected that the gel is reconstructed. In addition, it was set as the prescription which reduced the amount of moisture supposing that a part of water | moisture content volatilizes at the time of coating.
The load was applied to a cone plate type rheometer (Patent Physica MCR-300) with a cone type 50 mm in diameter and 2 °, and the load was applied at an angular velocity of 0.5 to 500 1 / s Log. Was measured at 30 ° C.
Since the emulsified particle diameter was 1 μm or less, the measurement was performed by the dynamic scattering method, and specifically, NICOMP-270 (manufactured by HYAC / ROYCO) was used.
The endothermic peak temperature was measured using a differential scanning calorimeter (DSC), specifically, DSC 120 (manufactured by Seiko Denshi Kogyo Co., Ltd.), and obtained from the obtained DSC temperature rise curve. The results are shown in FIG.

(Table 2)
Test example
6 7 8 9 10
(1) Dineeopentanoic acid tripropylene glycol
(IOB: 0.52) --- --- --- --- 0.9
(2) Trioctanoin
(IOB: 0.36) --- --- --- 0.9 ---
(3) Dioctyl succinate
(IOB: 0.32) --- --- 0.9 --- ---
(4) Cetyl octanoate
(IOB: 0.13) --- 0.9 --- --- ---
(5) Squalane
(IOB: 0) 7.2 6.3 6.3 6.3 6.3
(6) Dimethyl silicone
(IOB: 0) 11.6 11.6 11.6 11.6 11.6
(7) N-stearoyl-L-monosodium glutamate
1.9 1.9 1.9 1.9 1.9
(2) Behenyl alcohol 4.1 4.1 4.1 4.1 4.1
(9) Glycerin 25.1 25.1 25.1 25.1 25.1
(10) Dipropylene glycol 12.5 12.5 12.5 12.5 12.5
(11) Ion-exchanged water Residue Residue Residual Residue Residual Residue
(Manufacturing method and evaluation)
(1) to (8) are mixed with stirring at 80 ° C. This is added to a solution obtained by heating and dissolving the mixed solution of (9) to (11) at 80 ° C. while stirring and emulsified. This emulsion was emulsified using a high-pressure homogenizer at 75 ° C. under a pressure of 6000 psi to obtain a translucent low viscosity lotion composition.

In prescriptions with low IOB oil content, the endothermic peak on the high temperature side derived from the gel is observed after loading, but in prescriptions with high polar oil content, peak changes occur before and after loading. Not.
Similarly, even in the change in the particle size distribution before and after loading, in the composition blended with an oil component having a low IOB, particles having a large particle size were observed due to the gel structure reconstruction after loading, whereas an oil component having a high IOB was blended. In the obtained composition, the proportion of particles having a large particle size observed was small, and in particular, in the formulation containing tripropylene glycol dineopentanoate, the particle size did not change at all and remained fine particles.
In other words, in the prescription with a low IOB oil content, the gel is reconstructed by a light load assuming the initial application, whereas in a prescription with a high IOB oil (tripropylene glycol dineopentanoate) No gel is generated at a light load assuming the initial stage.

<Relationship between blending amount of each oil and endothermic peak temperature>
In order to investigate the relationship between the blending amount of each oil and the endothermic peak temperature, an oil-in-water emulsion composition in which various oils were blended based on the formulation in Table 3 was produced, and the endothermic peak temperature was measured.
The endothermic peak temperature was measured as described above.

(Table 3)
Test example
11 12 13 14
(1) Squalane
(IOB: 0) 0.1-1.6 ―― ―― ――
(2) Cetyl octanoate
(IOB: 0.13) ――0.1 ~ 1.6 ――――
(3) Trioctanoin
(IOB: 0.32) -------- 0.1 to 1.6
(4) Dineeopentanoic acid tripropylene glycol
(IOB: 0.52) ―――――――― 0.1 ~ 1.6
(5) Behenyl alcohol 3.4 3.4 3.4 3.4
(6) Monosodium N-stearoyl-L-glutamate
1.6 1.6 1.6 1.6
(7) Ion-exchanged water Residue Residual Residue Residual
(Manufacturing method)
(6) and (7) were mixed with stirring at 80 ° C., and this was mixed with stirring (1) to (5) at 70 ° C. with stirring. Mantongaurine was added at 80 ° C. under a pressure of 7000 psi. A sample was obtained by emulsification.

FIG. 2 shows the endothermic peak temperature of the oil-in-water emulsion composition containing various oil components.
When the oil content was 0%, a gel was formed in water and the endothermic peak temperature was 79 ° C. And when the oil component is blended, in Test Examples 13 to 14, a decrease in the endothermic peak temperature is observed as the amount of oil component increases, and in the case of blending a highly polar oil component, particularly tripropylene glycol dineopentanoate having an IOB of 0.5 or more. A significant decrease was observed.
Thus, it can be seen that a highly polar oil component having an IOB of 0.5 or more, particularly tripropylene glycol dineopentanoate, significantly changes the structure formed by the amphiphile-surfactant-water.
Although the further Example of the oil-in-water type emulsion composition concerning this invention is shown below, it is not limited to this.

Lotion Prescription Formulation Amount (% by mass)
(1) Behenyl alcohol 0.8
(2) Dimethyl silicone 2.0
(3) Squalane 1.2
(4) Dineopentanoic acid tripropylene glycol 0.2
(5) L-arginine hydrochloride 0.05
(6) Glycerin 7.5
(7) Dipropylene glycol 6.5
(8) Methylparaben 0.05
(9) Monosodium N-stearoyl-L-glutamate 0.4
(10) Trisodium edetate 0.01
(11) Ion exchange water remaining

(Manufacturing method and evaluation)
(1) to (4) are mixed with stirring at 80 ° C. This is added to a solution obtained by heating and dissolving the mixed solution of (5) to (11) at 80 ° C. while stirring and emulsified. This emulsion was emulsified using a high-pressure homogenizer at 75 ° C. under a pressure of 6000 psi to obtain a translucent low viscosity lotion.
When actually used, it had a cream-like feel during application, but it was a feeling that the skin was familiar and quick and non-sticky.

It is the figure which showed the physical property change before and behind the load in the oil-in-water type emulsion composition of each test example. It is the figure which showed the relationship between each oil content concentration and endothermic peak temperature in the oil-in-water type emulsion composition of each test example.

Claims (6)

(A) an aqueous phase;
(B) an oil phase containing a highly polar oil component having an IOB of 0.50 or more and dispersed in the water phase;
(C) an amphiphilic substance;
(D) a hydrophilic surfactant,
An oil-in-water emulsion composition having an average emulsion particle size of 0.01 to 0.15 μm. 2. The oil-in-water emulsion composition according to claim 1, wherein the highly polar oil component is a dineopentanoic acid alkylene polyglycol represented by the following general formula (I).
(Chemical formula 1)

(In the formula, m represents an integer of 2 to 4, and n represents an integer of 2 to 3.) 3. The oil-in-water emulsion composition according to claim 1, wherein the amphiphilic substance is a higher alcohol having a carbon chain length of 16 or more. 4. The oil-in-water emulsion composition according to claim 1, wherein the hydrophilic surfactant is an N-long chain acyl acidic amino acid salt. The oil-in-water emulsion composition according to any one of claims 1 to 4, wherein the highly polar oil component is 10% by mass or less based on the oil phase. The composition according to any one of claims 1 to 5, further comprising a polyhydric alcohol in the aqueous phase.

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