KR20190101359A - Oil-in-water emulsion composition - Google Patents

Abstract

The oil-in-water emulsion composition containing following component (A)-(D) and whose content mass ratio [(A) / (B)] of component (A) with respect to component (B) is 0.06 or more and 18 or less.
(A) Polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether whose carbon number of an alkyl group or alkenyl group is 20 or more and 24 or less and the average added mole number of ethylene oxide is 1.5 or more and 4 or less.
(B) phosphorus lipid
(C) hydrophobized powder
(D) water

Description

Oil-in-water emulsion composition

The present invention relates to an oil-in-water emulsion composition.

In recent years, the importance of UV protection measures in daily life has been pointed out, and even in cosmetics having a protective effect against ultraviolet rays, an oil-in-water emulsion-type sunscreen cosmetic which is easy to use for a fresh feeling is developed. Ultraviolet scattering agent (hydrophobization metal oxide powder) is mix | blended with such an oil-in-water emulsion cosmetic in order to raise an ultraviolet protective effect (refer patent document 1, 2).

However, when a large amount of metal oxide powders such as zinc oxide and titanium oxide, which are ultraviolet scattering agents, are mixed, sedimentation and sedimentation of the powder occur not only over time, but also the problem that the stability over time such as viscosity decrease, emulsion separation, and precipitation decreases. there was.

On the other hand, in patent document 3, the ultraviolet-ray scattering agent (hydrophobization metal oxide powder) is mix | blended stably using polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether in which carbon chain length and ethylene oxide addition mole number exist in a fixed range. One sunscreen cosmetic is disclosed. Such a sunscreen cosmetic is excellent in low temperature stability, good spreading and adhesion on the skin, and stickiness or stiffness by forming the soft layered structure (multi lamella vesicle structure) by forming the compound at the interface between the water phase and the oil phase. This is suppressed, and the moisturizing effect is also high.

Japanese Laid-Open Patent Publication 2006-8796 Japanese Laid-Open Patent Publication 2005-272389 Japanese Laid-Open Patent Publication No. 2014-114274

This invention contains following component (A)-(D), The oil-in-water emulsion composition whose mass ratio [(A) / (B)] of the component (A) with respect to a component (B) is 0.06 or more and 18 or less. To provide.

(A) Polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether whose carbon number of an alkyl group or alkenyl group is 20 or more and 24 or less and the average added mole number of ethylene oxide is 1.5 or more and 4 or less.

(B) phosphorus lipid

(C) hydrophobized powder

(D) water

In the technique of patent document 3, there existed room for improvement in stability of a composition, such as the occurrence of partial emulsification failure at the time of high temperature, and a viscosity fall when a high shear force is applied.

Therefore, this invention relates to the oil-in-water emulsion composition which contains hydrophobized powder stably, is excellent in stability of an emulsification system at the time of high temperature storage or when a shearing force is applied, and also excellent usability, such as moisture.

As a result of various studies, the present inventors have combined specific polyoxyethylene alkyl ethers and phosphorus lipids used in the technique described in Patent Document 3 at a specific ratio, thereby improving the high temperature stability and shear strength of the oil-in-water emulsion composition containing hydrophobized powder. It was found that resistance (hereinafter referred to as "shear resistance") can be greatly improved, and the present invention was completed.

[Component (A): Polyoxyethylene alkyl (or alkenyl) ether having a carbon chain length and EO addition mole number in a specific range]

The polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether of the component (A) used for this invention is a C20 or more and 24 or less carbon number of an alkyl group or an alkenyl group, and the average added mole number of ethylene oxide is 1.5 or more and 4 or less. .

The alkyl group or alkenyl group of the component (A) may be linear or branched, and is preferably a linear or branched alkyl group from the viewpoint of forming a lamellar structure at the oil phase interface, and more preferably a linear Alkyl group. Carbon number of an alkyl group or an alkenyl group forms a lamellar structure in an oil phase interface, and is 20 or more from a viewpoint of improving high temperature stability (emulsification stability) and shear resistance, Preferably it is 21 or more, and dissolves stably in an oil phase. It is 24 or less from a viewpoint, Preferably it is 23 or less. From such a viewpoint, it is more preferable that carbon number of an alkyl group or an alkenyl group is 22, and the alkyl group of 22 carbon atoms (namely, a behenyl group) is especially preferable.

The average added mole number of the ethylene oxide in the component (A) is 1.5 or more from the viewpoint of lowering the crystallinity and dissolving easily in the oil phase, forming a structure at the oil phase interface, and high temperature stability (emulsification stability), It is 4 or less from a viewpoint of improving shear resistance, Preferably it is 3 or less, More preferably, it is 2.5 or less. Generally available polyoxyethylene alkyl ethers or polyoxyethylene alkenyl ethers are mixtures which are very widely distributed with respect to the number of moles of ethylene oxide centered on a desired degree of polymerization, but in the present invention, the average added mole number is in the above range. It is important to be mine.

As a component (A), polyoxyethylene (2) aralkyl ether, polyoxyethylene (3) aralkyl ether, polyoxyethylene (4) aralkyl ether, polyoxyethylene (2) behenyl ether, polyoxyethylene ( 3) behenyl ether, polyoxyethylene (4) behenyl ether, polyoxyethylene (2) carnabyl ether, polyoxyethylene (3) carnabyl ether, polyoxyethylene (4) carnabyl ether, and the like. Preferably, polyoxyethylene (2) behenyl ether, polyoxyethylene (3) behenyl ether, and polyoxyethylene (4) behenyl ether are mentioned. Moreover, as long as the average added mole number of the polyoxyethylene alkyl ether to be used exists in the said range, it is also possible to use together other than these illustrated polyoxyethylene alkyl ether.

The content of component (A) in the oil-in-water emulsion composition of the present invention is preferably 0.05% by mass or more from the viewpoint of facilitating formation of a lamellar structure at the oil phase interface, improving shear resistance and improving moist feeling. More preferably, it is 0.10 mass% or more, More preferably, it is 0.12 mass% or more, More preferably, it is 0.16 mass% or more, More preferably, it is 0.5 mass% or more, More preferably, it is 0.8 mass% or more, More preferably, 5 mass% or less, More preferably, it is 3 mass% or less, More preferably, it is 2 mass% or less, More preferably, it is 1.82 mass% or less, More preferably, it is 1.5 mass% or less, More preferably, it is 1.2 mass% or less to be. The specific content range of the component (A) is preferably 0.05 to 5% by mass, more preferably 0.10 to 3% by mass, still more preferably 0.12 to 2% by mass, still more preferably 0.16 to 1.82% by mass, further Preferably it is 0.5-1.5 mass%, More preferably, it is 0.8-1.2 mass%.

[Component (B): Phosphorus Lipid]

The phosphorus lipid of component (B) has a phosphatidylcholine content of 60% by mass or more, from the viewpoint of improving high temperature stability, shear resistance, suppressing stickiness, permeating skin, and improving makeup eating well. It is preferable that it is mass% or more, Furthermore, it is 65 mass% or more. Moreover, it is preferable that phosphatidylcholine content is 98 mass% or less. Examples of phosphorus lipid components other than phosphatidylcholine include phosphatidic acid, phosphatidylserine, phosphatidylethanolamine, phosphatidyl inositol, phosphatidylglycerol, and the like.

The phosphorus lipid used in the present invention may be a natural product extracted or purified from a plant or animal, or may be chemically synthesized, or may be subjected to processing such as hydrogenation or hydroxylation. As a natural product, from the viewpoint of improving the stability over time and reducing skin irritation, lecithin, which is an extract or purified from soybean or egg yolk, is preferable, and hydrogenated or hydroxy-treated is more preferable.

Specifically, soybean lecithin hydrogenated substance and egg yolk lecithin hydrogenated substance are mentioned preferably.

The content rate of phosphatidylcholine in phosphorus lipid can be analyzed by the method using thin layer chromatography (TLC), high performance liquid chromatography (HPLC), itaroscan (made by Itron). For example, an organic solvent containing phosphorus lipid described in JP-A-2001-186898 is spotted on TLC, developed into chloroform: methanol: acetic acid = 65:25:10, and sprayed and heated with 50% by mass of ethanol sulfate. The method of analyzing phosphorus lipid with a hind dentometer is mentioned. In addition to the above method, any method may be used as long as it is a method capable of measuring and calculating the content and content of phosphatidylcholine contained in the phosphorus lipid.

Examples of the phosphorus lipid containing 60% by mass or more of phosphatidylcholine include coatsome NC-21 (hydrogenated soybean lecithin; manufactured by Nichiyu Co., Ltd.), resinol S-10E, resinol S-10EX (hydrogenated soybean lecithin; Nikko Chemicals, Inc.). And Phospholipid PCSH70 (hydrogenated soybean lecithin; manufactured by Nippon Purification Co., Ltd.).

The content of component (B) in the oil-in-water emulsion composition of the present invention is preferably 0.05% by mass or more, more preferably 0.10% by mass or more, further preferably from the viewpoint of improving high temperature stability, shear resistance and usability. Preferably it is 0.12 mass% or more, More preferably, it is 0.16 mass% or more, More preferably, it is 0.5 mass% or more, More preferably, it is 0.8 mass% or more, Preferably it is 5 mass% or less, More preferably, 3 It is mass% or less, More preferably, it is 2 mass% or less, More preferably, it is 1.82 mass% or less, More preferably, it is 1.5 mass% or less, More preferably, it is 1.2 mass% or less. The specific content range of the component (B) is preferably 0.05 to 5% by mass, more preferably 0.10 to 3% by mass, still more preferably 0.12 to 2% by mass, still more preferably 0.16 to 1.82% by mass. Preferably it is 0.5-1.5 mass%, More preferably, it is 0.8-1.2 mass%.

The total content of component (A) and component (B) in the oil-in-water emulsion composition of the present invention is preferably 0.5 mass% or more, more preferably 1.2 mass% from the viewpoint of improving high temperature stability and shear resistance. As mentioned above, More preferably, it is 1.8 mass% or more, Moreover, from a viewpoint of a moisture improvement, Preferably it is 6 mass% or less, More preferably, it is 3.5 mass% or less, More preferably, it is 2.5 mass% or less. The specific sum total content range of component (A) and component (B) becomes like this. Preferably it is 0.5-6 mass%, More preferably, it is 1.2-3.5 mass%, More preferably, it is 1.8-2.5 mass%.

In addition, the content mass ratio [(A) / (B)] of the component (A) to the component (B) is preferably 0.06 or more, more preferably 0.08 or more, from the viewpoint of improving high temperature stability and shear resistance, More preferably, it is 0.10 or more, More preferably, it is 0.5 or more, and from a viewpoint of obtaining a moist feeling, Preferably it is 18 or less, More preferably, it is 14 or less, More preferably, it is 10 or less, More preferably, it is 3 or less to be. The content mass ratio [(A) / (B)] of the component (A) to the specific component (B) is preferably 0.06 to 18, more preferably 0.08 to 14, still more preferably 0.10 to 10, further preferably Preferably it is 0.5-3.

[Component (C): Hydrophobized Powder]

The powder to be used for the hydrophobized powder of component (C) is not particularly limited as long as it is used in pharmaceuticals, cosmetics, and food fields. Zinc oxide, titanium oxide, cerium oxide, iron oxide, chromium oxide, carbon black, titanium black , Bentonite, kaolin, mica, sericite, talc, navy blue, ultramarine pink, red 202, red 220, red 226, blue 404, yellow 401, polyethylene powder, polystyrene powder, polymethyl methacrylate powder, Nylon powder, silicon powder, cellulose powder, and the like, but metal oxide powder is preferred from the viewpoint of improving the emulsion stability and the ultraviolet protective effect, and is selected from zinc oxide, titanium oxide, cerium oxide, iron oxide, and chromium oxide. It is more preferable to contain the above, and it is still more preferable to contain 1 or more types chosen from zinc oxide, titanium oxide, and iron oxide. In particular, when used for skin color correction applications, it is preferable to use iron oxide which can be adjusted to a color close to the skin color, and when used for UV blocking applications, it is selected from zinc oxide, titanium oxide and cerium oxide, which have high ultraviolet scattering effect. It is preferable to use 1 or more types, and it can also make skin color correction and a sunscreen effect compatible by using these together.

As zinc oxide powder, FINEX-25, FINEX-50, FINEX-75 (made by Sakai Chemical Corporation), MZ500 series, MZ700 series (made by Teika Corporation), ZnO-350 (made by Sumitomo Osaka Cement Corporation) etc. are commercially available, for example. It is becoming. As titanium oxide powder, TTO-55 series, TTO-51 series (made by Ishihara Industrial Co., Ltd.), JR series, JA series (made by Teika Corporation), etc. are marketed. As iron oxide powder, LL-100P, R-516P, BL-100P (made by titanium industry company), etc. are marketed. In addition, cerium oxide includes high purity cerium sold by Nikki or Seimi Chemical.

It is preferable that the average particle diameter of the powder used for the hydrophobized powder of component (C) is smaller than the emulsified particle diameter of the oil-in-water emulsion composition from a viewpoint of including hydrophobized powder in oil phase and improving emulsion stability, Preferably it is 28 Μm or less, more preferably 23 µm or less, still more preferably 18 µm or less, and from the viewpoint of suppressing the cohesiveness of the powder, preferably 0.01 µm or more, more preferably 0.012 µm or more, still more preferably It is 0.015 micrometers or more. As a specific average particle diameter, Preferably it is 0.01-28 micrometers, More preferably, it is 0.012-23 micrometers, More preferably, it is 0.015-18 micrometers. In the oil-in-water emulsion composition of the present invention, when the powder of the size of the color pigment level is contained in the oil phase, it is more effective. In addition, the measurement of the average particle diameter was calculated | required by the additive average of the particle diameter with respect to 20 arbitrary powders of arbitrary visual fields in a transmission electron micrograph. In addition, about the powder other than spherical shape, such as rod shape, spindle shape, needle shape, flaky shape, and irregular shape, the shopping mall average of the long axis was considered as the average particle diameter.

As a shape of the powder used by this invention, spherical shape, rod shape, fusiform shape, needle shape, flaky shape, irregular shape, etc. are mentioned, The thing of arbitrary shape can be used if average particle diameter exists in the said range.

The hydrophobization treatment for the powder is not particularly limited, and various hydrophobization treatments such as fluorine compound treatment, silicone treatment, silicone resin treatment, pendant treatment, silane coupling agent treatment, titanate coupling agent treatment and emulsion treatment , Acylamino acid metal salt treatment, polyacrylic acid treatment, metal soap treatment, crystalline cellulose treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, silane compound treatment, silazane compound treatment, and the like.

Among them, from the viewpoint of improving the dispersibility of the powder and improving the high temperature stability and the low temperature stability, hydrophobization treatment using a silicone or a silicone resin, methylhydrogenpolysiloxane or methylhydrogenpolysiloxane dimethyl represented by the following general formula (1) One or two or more hydrophobization treatments selected from hydrophobization treatment with a polysiloxane copolymer, hydrophobization treatment with a silane compound or silazane compound, hydrophobization treatment with a titanate-based coupling agent and hydrophobization treatment with an acylamino acid metal salt are preferred. 1 or 2 or more types of hydrophobic treatments selected from hydrophobic treatment using a methylhydrogenpolysiloxane, hydrophobic treatment using a silane compound or silazane compound, hydrophobic treatment using a titanate-based coupling agent, and hydrophobic treatment using an acylamino acid metal salt. More preferred.

[Formula 1]

As the hydrophobization treatment using the silicone or silicone resin, as described in Japanese Patent Publication No. 3187440, at least one or more kinds of silicone compounds (except for silane compounds), wherein the powder is composed of organopolysiloxanes and silicone resins After coating in a non-gaseous state, a method of coating the powder with silicon oxide may be mentioned by firing at a temperature of 600 to 950 ° C. in an oxygen-containing atmosphere.

As said silane compound or silazane compound, the silane compound or silazane compound which has a C1-C20 alkyl group or a fluoroalkyl group, and has reactivity with an inorganic oxide is preferable, Specifically, it is represented by following General formula (2) The silazane compound represented by a silane compound or general formula (3) is mentioned, These can be used 1 type or 2 types or more.

RR ¹ _n SiX _3-n (2)

(n is an integer of 0 or 1, R represents a linear or branched alkyl group or fluoroalkyl group having 1 to 20 carbon atoms, R ¹ represents an alkyl group having 1 to 6 carbon atoms, X represents a halogen atom or an alkoxy group) Indicates)

R ² R ³ R ⁴ SiNHSiR ⁵ R ⁶ R ⁷ (3)

(R <^2> -R <^7> respectively independently represents a C1-C20 linear or branched alkyl group or a fluoroalkyl group)

Specific silane compounds include hexyltrimethoxysilane, octyltrimethoxysilane, decyltrimethoxysilane, octadecyltrimethoxysilane, octyltriethoxysilane, trifluoropropyltrimethoxysilane and heptadecafluoro Decyl trimethoxysilane, etc. are mentioned. Of these, octyltriethoxysilane and octyltrimethoxysilane are preferable. As a silazane compound, hexamethyldisilazane is preferable. Since the silane compound or the silazane compound is easy to treat uniformly, there are easy-to-supply and cost-effective features, and cosmetics containing powders hydrophobized with such compounds have excellent properties such as dispersibility. desirable.

In the hydrophobization treatment using the silane compound or the silazane compound, the silane compound or the silazane compound and the powder are mixed in an organic solvent such as n-hexane, cyclohexane, lower alcohol, and optionally pulverized after The method of chemically reacting on the surface of a powder by the reactive group of a silane compound or a silazane compound is mentioned by the method of removing an organic solvent by heating or reduced pressure, and heat-processing at 80-250 degreeC preferably. .

Moreover, as described in Unexamined-Japanese-Patent No. 2007-326902, the method of hydrophobizing the alkylalkoxy silane in water after coating powder with a specific polysiloxane compound is also mentioned.

As a hydrophobization process using the said titanate-type coupling agent, isopropyl triisostearoyl titanate and isopropyl tris (dioctyl pyrophosphate) in powder aqueous dispersion, as described in Unexamined-Japanese-Patent No. 1-131282. Titanates, such as titanate, isopropyl tri (N-aminoethyl-aminoethyl) titanate, and isopropyl tridecylbenzenesulfonyl titanate, are added, and the mixture is stirred at high speed and optionally washed with water and dried. And a method in which a titanate coupling agent is sprayed on the powder, mixed with high shear stirring, and optionally pulverized. When mixing powder and titanate coupling agent, it is preferable to add a trace amount of aqueous solution of metal chlorides, such as zinc chloride and aluminum chloride, and, thereby, can make reaction generate | occur | produce quickly and uniformly on the whole surface of powder.

As the hydrophobization treatment using the acylamino acid metal salt, N-acyl is used in a solvent such as water, alcohols (ethanol, isopropyl alcohol, isobutanol, etc.), a polar solvent (acetone, ethyl acetate, butyl acetate, and the like) or various mixed solvents. The method of melt | dissolving or disperse | distributing an amino acid metal salt, stirring this solution with powder, and removing a solvent is mentioned.

Examples of the N-acylamino acid metal salt include N-hexanoyl aspartic acid (glutamic acid), N-oleyl aspartic acid (glutamic acid), N-lauroyl aspartic acid (glutamic acid), and N-myristoyl aspartic acid (glutamic acid). And metal salts such as N-palmitoyl aspartic acid (glutamic acid), N-stearoyl aspartic acid (glutamic acid), and N-linolenoyl aspartic acid (glutamic acid). In addition, the description of said "N-hexanoyl aspartic acid (glutamic acid)" etc. mean both the group of N-hexanoyl aspartic acid and N-hexanoyl glutamic acid. Examples of the metal salts include sodium salts, potassium salts, calcium salts and magnesium salts.

The coating amount of the hydrophobization treatment agent to the powder is preferably 1% by mass or more with respect to the total amount of the powder to be used, from the viewpoint that the surface treatment agent is uniformly coated on the powder surface and the hydrophobization treatment agent is not aggregated or precipitated on the powder surface. More preferably, it is 1.5 mass% or more, More preferably, it is 10 mass% or less, More preferably, it is 5 mass% or less. Concrete coating amount becomes like this. Preferably it is 1-10 mass%, More preferably, it is 1.5-5 mass%.

The content of component (C) in the oil-in-water emulsion composition of the present invention is preferably 0.1 mass% or more, more preferably 1 mass% or more, even more preferably from the viewpoint of improving the ultraviolet ray protective effect and the emulsion stability. Is 5 mass% or more, Preferably it is 30 mass% or less, More preferably, it is 20 mass% or less, More preferably, it is 15 mass% or less. The specific range of component (C) becomes like this. Preferably it is 0.1-30 mass%, More preferably, it is 1-20 mass%, More preferably, it is 5-15 mass%.

[Component (D): Water]

The content of water in the oil-in-water emulsion composition of the present invention is preferably 40 mass% or more, more preferably 45 in terms of improving the moist feel and forming an oil-in-water emulsion composition excellent in high temperature stability and shear resistance. It is mass% or more, Preferably it is 80 mass% or less, More preferably, it is 75 mass% or less. The specific content range of water is preferably 40 to 80% by mass, more preferably 45 to 75% by mass.

[Component (E): Liquid Oil]

The liquid oil of component (E) is an oily agent which has fluidity at 25 degreeC under 1013.25 hPa, This includes a liquid organic ultraviolet absorber and the oil agent used for normal cosmetics. In this invention, in order to improve an ultraviolet-ray protective effect, it is preferable to contain a liquid organic ultraviolet absorber.

As a liquid organic ultraviolet absorber, 2-methoxyhexyl para methoxy cinnamic acid, 2-ethoxy ethyl para methoxy cinnamic acid, isopropyl diisopropyl cinnamic acid ester mixture of para methoxy cinnamic acid, and a trimethoxy cinnamic acid methyl bis (trimethyl Siloxy) silyl isopentyl, amyl paradimethylamino acid, 2-ethylhexyl paradimethylamino acid benzoic acid, ethylene glycol salicylate, 2-ethylhexyl salicylic acid, benzyl salicylic acid, homosaltylic acid salicylic acid, octocrylene, dimethicodiethylbenzalmalate 1 type, or 2 or more types chosen from the group which consists of these are mentioned. Among them, from the viewpoint of improving the ultraviolet protective effect, emulsification state, high temperature stability and low temperature stability, 2-methoxyhexyl paramethoxycinyl acid, 2-ethylhexyl salicylic acid, homomentyl salicylic acid, octocrylene and dimethicodiethylbenzalmal It is preferable to contain 1 type (s) or 2 or more types chosen from a nate, and what contains 1 type (s) or 2 or more types selected from 2-methoxyhexyl, octocrylene, and dimethicodiethyl benzalmalonate of paramethoxy cinnamic acid More preferably, it is more preferable to contain 2-methoxyhexyl paramethoxycinnamic acid.

As an oil agent other than the said organic ultraviolet absorber contained in liquid oil, if it is liquid in 1013.25 hPa and 25 degreeC environment, it will not specifically limit. Specifically, Hydrocarbon oil, such as an alpha olefin oligomer, a liquid isoparaffin, a liquid paraffin, squalane; Triglycerides such as glyceryl trioctanoate, avocado oil, olive oil, sesame oil, rice bran oil, safflower oil, soybean oil, corn oil, rapeseed oil, castor oil, cottonseed oil and mink oil; Fatty acids such as oleic acid and isostearic acid; Isopropyl myristate, butyl myristic acid, isopropyl palmitate, ethyl oleate, ethyl linoleate, isopropyl linoleate, cetyl caprylate, hexyl laurate, myristic acid decyl, oleic acid oleic acid, la Isostearyl urethane, isotridecyl myristate, isocetyl myristate, isostearyl myristate, octyl dodecyl myristate, octyl palmitate, isocetyl palmitate, isostearyl palmitate Propylene glycol dioleate, isodecyl oleate, isopropyl isostearic acid, cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, propylene glycol dicapric acid, propylene glycol dioleate, glyceryl tri2-ethylhexanoate Ester oils such as glyceryl tri (capryl capric acid), isononyl isononate, diisopropyl sebacate, and propylene glycol isostearic acid; Branched or unsaturated higher alcohols such as 2-octyldodecanol, isostearyl alcohol and oleyl alcohol; Dimethyl polysiloxane etc. are mentioned. Among these, preferably octylate dodecyl, isocetyl myristate, cetyl 2-ethylhexanoate, glyceryl tri-ethylhexanoate, glyceryl tri (capryl capric acid), and isononanoic acid It is 1 type, or 2 or more types chosen from isononyl, diisopropyl sebacate, propylene glycol isostearic acid, neopentyl glycol dicapric acid, isohexadecane, squalane, and hydrogenated polyisobutene.

The content of component (E) in the oil-in-water emulsion composition of the present invention is preferably 5% by mass or more, more preferably from the viewpoint of improving the moist feeling and improving the emulsified state, high temperature stability and low temperature stability. It is 8 mass% or more, More preferably, it is 10 mass% or more, Preferably it is 25 mass% or less, More preferably, it is 20 mass% or less, More preferably, it is 18 mass% or less. The specific content range of component (E) becomes like this. Preferably it is 5-25 mass%, More preferably, it is 8-20 mass%, More preferably, it is 10-20 mass%, More preferably, it is 10-18 mass%.

Moreover, it is preferable that the content mass ratio of the liquid organic ultraviolet absorber in all the components (E) is 0.3 or more from a viewpoint of improving moist usability and improving high temperature stability and an ultraviolet protective effect, reducing liquid oil content. It is more preferable that it is 0.5 or more, 0.6 or more are more preferable, 0.7 or more are more preferable.

[Component (F): Solid UV Absorber at 25 ° C]

It is preferable that the oil-in-water emulsion composition of this invention contains a solid ultraviolet absorber at 25 degreeC further as a component (F) in order to raise an ultraviolet protective effect. The solid-state ultraviolet absorber at 25 ° C used in the present invention is not particularly limited as long as it can be blended into cosmetics, quasi-drugs and pharmaceuticals.

As a specific example of component (F), dimethoxybenzylidenedioximidazolidine propionic acid 2-ethylhexyl, diethylaminohydroxybenzoylbenzoic acid hexyl ester, 2,4-bis [[4- (2-ethylhexyl jade C) -2-hydroxy] -phenyl] -6- (4-methoxyphenyl) -1,3,5-triazine, 2,4,6-tris [4- (2-ethylhexyloxycarbonyl ) Anilino] -1,3,5-triazine and 4-tert- butyl-4'-methoxydibenzoylmethane 1 type, or 2 or more types are selected.

Among them, diethylaminohydroxybenzoylbenzoic acid hexyl ester and 2,4-bis [[4- (2-ethylhexyloxy) -2-hydroxy from the viewpoint of improving the ultraviolet protective effect, high temperature stability and shear resistance. ] -Phenyl] -6- (4-methoxyphenyl) -1,3,5-triazine and 2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1, One kind or two or more kinds selected from the group consisting of 3,5-triazines can be preferably used.

Such a component (F) is marketed generally and is soft-shade DH (2-methoxyhexyl dioxo imidazolidine propionic acid 2-ethylhexyl; the product made by Ajinomoto Co., Ltd.), Ubunal Aplus (2- (4-diethylamino 2-hydroxybenzoyl) benzoic acid hexyl ester; manufactured by BASF Corporation), tinosorb S (2,4-bis [[4- (2-ethylhexyloxy) -2-hydroxy] -phenyl] -6- (4-methoxyphenyl) -1,3,5-triazine; manufactured by BASF Co., Ltd.), Eubinal T-150 (2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino ] -1,3,5-triazine), parasol 1789 (4-tert-butyl-4'-methoxydibenzoylmethane; the Roche company make), etc. are mentioned.

The content of component (F) in the oil-in-water emulsion composition of the present invention is preferably 0.5% by mass or more, more preferably 1% by mass or more from the viewpoint of improving the ultraviolet ray protective effect, high temperature stability and shear resistance. More preferably, it is 1.5 mass% or more, Preferably it is 10 mass% or less, More preferably, it is 7.5 mass% or less, More preferably, it is 5 mass% or less. The specific content range of component (F) becomes like this. Preferably it is 0.5-10 mass%, More preferably, it is 0.5-7.5 mass%, More preferably, it is 0.5-5 mass%.

[Component (G): Water Soluble Polymer]

It is preferable that the oil-in-water emulsion composition of this invention contains a water-soluble polymer further as a component (G) in order to improve the dispersion stability of an aqueous phase, and to improve high temperature and low temperature stability. Examples of the water-soluble polymer used in the present invention include water-soluble cationic polymers, anionic polymers, nonionic polymers, and amphoteric polymers or bipolar polymers.

Specific examples of the cationic polymer include hydroxyethyl cellulose (polyquaternium-10) and vinylpyrrolidone-dimethylaminomethyl having a chloride O- [2-hydroxy-3- (trimethylammonio) propyl] group. Ethyl methacrylate copolymer diethyl sulfate (polyquaternium-11), methyl vinyl imidazolium chloride vinylpyrrolidone copolymer, etc. are mentioned.

Specific examples of the anionic polymer include carboxyvinyl polymer, carboxymethyl cellulose, carrageenan, xanthan gum, polystyrene sulfonate, agar, gati gum, karaya gum, pectin, alginate salt, acrylic acid methacrylate copolymer, (Acrylic acid Na / acryloyldimethyltaurine Na) copolymer, polyacrylamide, (acryloyldimethyltaurine ammonium / VP) copolymer, (acryloyldimethyltaurine ammonium methacrylate behenes-25) crosspolymer, ( Hydroxyethyl / acryloyldimethyltaurine Na) copolymer, (acrylamide / ammonium acrylate) copolymer, (Na / acryloyldimethyltaurine / dimethylacrylamide) crosspolymer, polyacrylate-13, polyacrylic Alkali metal salt of a late crosspolymer-6, poly (acrylic acid), hyaluronic acid, or its alkali metal salt is mentioned.

Specific examples of the nonionic polymer include cellulose ether (hydroxybutyl methyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, hydroxyethyl cellulose and the like), propylene glycol alginate, and poly ( Ethylene oxide), polyvinyl alcohol, polyvinylpyrrolidone, hydroxypropyl guar gum, locust bean gum, amylose, hydroxyethyl amylose, starch and starch derivatives and mixtures thereof.

Specifically as an amphoteric polymer or bipolar polymer, an octyl acrylamide / acrylate / butylaminoethyl methacrylate copolymer, polyquaternium-47, polyquaternium-43, etc. are mentioned.

These water-soluble polymers can be used individually or in combination of 2 or more types as appropriate. Carboxyvinyl polymer, acrylic acid methacrylate copolymer, xanthan gum, hydroxypropylmethylcellulose, polyacrylamide, (Na / acrylic acid acrylate) from the viewpoint of improving the emulsion stability and making it easier to apply to various formulations. Dimethyl taurine Na) copolymer, (acryloyldimethyltaurine ammonium / VP) copolymer and hyaluronic acid or one or more selected from alkali metal salts thereof, preferably polyacrylamide, (acrylic acid Na / acryloyl) It is more preferable to include one or more selected from dimethyltaurine Na) copolymer, (acryloyldimethyltaurine ammonium / VP) copolymer and xanthan gum.

Content of the component (G) in the oil-in-water emulsion composition of this invention becomes like this from the said viewpoint, Preferably it is 0.01 mass% or more, More preferably, it is 0.05 mass% or more, More preferably, it is 0.1 mass% or more, Preferably it is 4 mass% or less, More preferably, it is 2 mass% or less, More preferably, it is 1.5 mass% or less. The specific content range of component (G) becomes like this. Preferably it is 0.01-4 mass%, More preferably, it is 0.05-2 mass%, More preferably, it is 0.1-1.5 mass%.

[Component (H): C1-C3 saturated monohydric alcohol]

The oil-in-water emulsion composition of the present invention preferably contains a saturated monohydric alcohol having 1 to 3 carbon atoms as a component (H) from the point of improving the feeling of neat usability, the goodness of unfolding at the time of coating, and the water resistance and cold resistance. Do. Methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol can be mentioned as a component (H), It can be used individually or in combination of 2 or more types as appropriate. Among these, it is preferable to contain 1 type (s) or 2 types chosen from ethyl alcohol and isopropyl alcohol, and it is more preferable to contain ethyl alcohol from the said viewpoint.

Although content of the component (H) in the oil-in-water emulsion composition of this invention is not specifically limited, From a point which improves a refreshing usability, the favorableness of unfolding at the time of application, and water resistance and cold resistance, Preferably it is 1 mass% or more. More preferably, it is 3 mass% or more, More preferably, it is 5 mass% or more, Preferably it is 20 mass% or less, More preferably, it is 15 mass% or less, More preferably, it is 12 mass% or less. The specific content range of component (H) becomes like this. Preferably it is 1-20 mass%, More preferably, it is 3-15 mass%, More preferably, it is 5-12 mass%.

[Component (I): Polyhydric Alcohol]

It is preferable that the oil-in-water emulsion composition of this invention contains a polyhydric alcohol further as a component (I), in order to improve the moisture retention after application | coating and the favorableness of spreading at the time of application | coating. As component (I), for example, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol (preferably less than 650 molecular weight), propylene glycol, dipropylene glycol, polypropylene glycol (preferably less than average molecular weight 650) Glycols such as isoprene glycol and 1,3-butylene glycol; Glycerin, such as glycerin, diglycerol, and polyglycerol, is mentioned, It can be used individually or in combination of 2 or more types as appropriate.

Among these, it is preferable to contain 1 type (s) or 2 or more types chosen from ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1, 3- butylene glycol, glycerin, and diglycerol, and propylene It is more preferable to contain 1 type (s) or 2 or more types chosen from glycol, dipropylene glycol, 1, 3- butylene glycol, and glycerin.

The content of component (I) in the oil-in-water emulsion composition of the present invention is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, from the viewpoint of increasing the moisture retention and the goodness of spreading during application. More preferably, it is 1 mass% or more, Preferably it is 12 mass% or less, More preferably, it is 8 mass% or less, More preferably, it is 5 mass% or less, More preferably, it is 3 mass% or less. Concrete content range becomes like this. Preferably it is 0.1-12 mass%, More preferably, it is 0.5-8 mass%, More preferably, it is 1-5 mass%, More preferably, it is 1-3 mass%.

The average emulsion particle size of the oil-in-water emulsion composition of the present invention is preferably 1 µm or more, more preferably 30 µm or less, and 25 µm or less from the viewpoint of improving the emulsion stability, improving the moist feeling and the uniform applicability. More preferably, 20 micrometers or less are more preferable. Specifically, 1-30 micrometers is preferable, 1-25 micrometers is more preferable, and 1-20 micrometers is more preferable. In addition, the average particle diameter of emulsified particle | grains can measure repeatedly the particle diameter with respect to 20 arbitrary particle | grains of arbitrary visual fields in a microphotograph, and can obtain | require from a number-based average value.

[Other optional components]

In the oil-in-water emulsion composition of the present invention, various surfactants, oily components, silicone compounds, higher alcohols, fluorine compounds, resins, thickeners, and antibacterial agents, which are usually formulated in cosmetics, in addition to the above components, as long as the effects of the present invention are not impaired. Contains various raw materials used in ordinary cosmetics such as preservatives, humectants, salts, solvents, antioxidants, chelating agents, neutralizing agents, pH adjusting agents, insect repellents, physiologically active ingredients, limiting agents, fragrances, extracts of various animals and plants can do. In addition, each of these agents is not limited to the use as each agent, and depending on the purpose, it can be used as other uses, for example, as a perfume, or as a combined use with other uses, For example, it can use as what exhibits the effect as a restriction | limiting agent and a fragrance | flavor.

The oil-in-water emulsion cosmetic of this invention can be made to contain surfactant for the purpose of adjusting emulsion stability. It does not restrict | limit especially as surfactant, Silicone-containing surfactant, such as nonionic surfactant, anionic surfactant, cationic surfactant, amphoteric surfactant, natural surfactant, polyether modified silicone, a siloxane derivative, perfluoro Any of surfactants and the like containing a low alkyl group may be used, and one or two or more thereof may be used.

Among these surfactants, nonionic surfactants, polyether-modified silicones and silicone-containing surfactants are preferable, and specifically, sorbitan monosorbate monobasic, dimethicone copolyol, polyoxyethylene cured castor oil (40EO), poly Oxyethylene castor oil (40EO), monolauric acid polyoxyethylene sorbitan (20EO), monostearic acid polyoxyethylene (20EO), oleic acid polyoxyethylene sorbitan (20EO), polyoxyethylene (7) lauryl ether And PEG-7 trimethylol propane palm oil alkyl ether.

In the oil-in-water emulsion cosmetic of the present invention, even if the surfactant is not used in combination, the emulsion stability is good, and if the surfactant is mixed in a large amount, stickiness derived from the surfactant may occur, so that the preferred content is oil-in-water emulsion. 3 mass% or less is preferable with respect to a composition total amount, 1.5 mass% or less is more preferable, and 0.5 mass% or less is further more preferable. When it describes as a specific range, 0-3 mass% is preferable, 0-1.5 mass% is more preferable, 0-0.5 mass% is further more preferable.

〔Usage〕

There is no restriction | limiting in particular as a use of the oil-in-water emulsion composition of this invention, It can be used suitably for cosmetics, a medicine, quasi drug, etc. The oil-in-water emulsified composition of the present invention is a skin external preparation of a type that is retained on the skin (including the scalp) without being washed away because of its excellent water blocking effect, and more preferably skin, preferably skin except the scalp. For example, it can be used by apply | coating to any of a face, a body, a limb, and the like. Moreover, since it is excellent in stability even if it contains a ultraviolet absorber or an ultraviolet-scattering agent, it is preferable to apply to a sunscreen use, especially sunscreen, tanning, a cosmetics base cosmetic, a foundation which has ultraviolet protection ability, etc.

[Formulation]

As a formulation of the oil-in-water emulsion composition of this invention, it can apply to liquid form, an emulsion form, a cream form, a paste form, a solid form, a multilayer form, etc., and can also be applied to a sheet agent, a spray agent, and a mousse agent.

[Production method]

The oil-in-water emulsion composition of this invention can be manufactured by a predetermined procedure according to the form. For example, the oil-in-water emulsion composition of this invention is manufactured by the method including the process of mixing together the components (A)-(D) and the various components containing components (E)-(I) as needed. can do. Specifically, the manufacturing method of the oil-in-water emulsion composition of this invention,

The oil phase containing a component (A), a component (B), a component (C), an optional component of the component (E), a component (F), and other usefulness, if necessary, is more preferable at 50-90 degreeC. Preferably the process 1a and heat-stirring at 55-85 degreeC,

The water phase containing a component (D) and a component (G), a component (I), a component (H), and other water-soluble arbitrary components as needed, Preferably it is 50-90 degreeC, More preferably, 55- Step 2a, which is stirred by heating at 85 ° C;

The process 3a of mixing and emulsifying the preparation of process 1a and the preparation of process 2a can be included.

In step 3a, the preparation of step 2a is cooled to 15 to 40 ° C, preferably 20 to 30 ° C, and the preparation of step 1a is kept above 40 ° C, preferably 50 to 70 ° C, and step 2a It is preferable to add the preparation of the process 1a, stirring, mixing, and emulsifying while stirring the preparation of. As a result, the component (A) easily forms a lamellar structure at the oil phase interface with the addition of the oil phase to the aqueous phase, and a stable oil-in-water emulsion composition can be obtained.

Moreover, in order to improve the dispersibility to the oil phase of component (C), it is preferable to include the process of disperse | distributing component (C) before adding to an oil phase. Specifically,

The oil phase containing a component (A) and a component (B) and the component (E), a component (F), and other useful components as needed, Preferably it is 50-90 degreeC, More preferably, it is 55- Step 1b of heating and stirring at 85 ° C;

Step 2b of uniformly dispersing the component (C), and

Process 3b which adds the preparation of process 2b to the preparation of process 1b, Preferably it heat-stirred at 50-90 degreeC, More preferably, it is 55-85 degreeC,

The water phase containing a component (D) and a component (G), a component (I), a component (H), and other water-soluble arbitrary components as needed, Preferably it is 50-90 degreeC, More preferably, 55- Step 4b for heating and stirring at 85 ° C;

The process 5b which mixes and emulsifies the preparation of the process 3b, and the preparation of the process 4b can be included.

In step 3b, the preparation of step 4b is cooled to 15 to 40 ° C, preferably 20 to 30 ° C, and the preparation of step 3b is kept above 40 ° C, preferably 50 to 70 ° C, and step 4b It is preferable to add the preparation of the process 3b, stirring, mixing, and emulsifying while stirring the preparation of. As a result, the component (A) easily forms a lamellar structure at the oil phase interface with the addition of the oil phase to the aqueous phase, and a stable oil-in-water emulsion composition can be obtained.

Regarding the embodiment described above, preferred embodiments of the present invention are further disclosed below.

The oil-in-water type emulsion composition containing <1> following component (A)-(D) and whose content mass ratio [(A) / (B)] of component (A) with respect to component (B) is 0.06 or more and 18 or less.

(A) Polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether whose carbon number of an alkyl group or alkenyl group is 20 or more and 24 or less and the average added mole number of ethylene oxide is 1.5 or more and 4 or less.

(B) phosphorus lipid

(C) hydrophobized powder

(D) water

The alkyl group or alkenyl group which <2> component (A) has is preferably a linear or branched alkyl group, More preferably, the oil-in-water emulsion composition as described in <1> which is a linear alkyl group.

The oil-in-water emulsion composition as described in <1> or <2> whose carbon number of the alkyl group or alkenyl group in <3> component (A) becomes like this. Preferably it is 21 or more and 23 or less.

The oil-in-water emulsion composition as described in any one of <1>-<3> whose average added mole number of the ethylene oxide in <4> component (A) becomes like this. Preferably it is 3 or less, More preferably, it is 2.5 or less.

Content of <5> component (A) becomes like this. Preferably it is 0.05 mass% or more, More preferably, it is 0.10 mass% or more, More preferably, it is 0.12 mass% or more, More preferably, it is 0.16 mass% or more, More preferably, 0.5 mass% or more, More preferably, it is 0.8 mass% or more, Preferably it is 5 mass% or less, More preferably, it is 3 mass% or less, More preferably, it is 2 mass% or less, More preferably, it is 1.82 mass% or less More preferably, it is 1.5 mass% or less, More preferably, it is 1.2 mass% or less, The oil-in-water type emulsion composition in any one of <1>-<4>.

The phosphatidylcholine content in the phosphorus lipid of <6> component (B) becomes like this. Preferably it is 60 mass% or more, More preferably, it is 62 mass% or more, More preferably, it is 65 mass% or more, and is 98 mass% or less The oil-in-water emulsion composition in any one of <1>-<5>.

The oil-in-water type emulsion composition in any one of <1>-<6> in which <7> component (B) is preferably chosen from a soybean lecithin hydrogenated substance and an egg yolk lecithin hydrogenated substance.

Content of <8> component (B) becomes like this. Preferably it is 0.05 mass% or more, More preferably, it is 0.10 mass% or more, More preferably, it is 0.12 mass% or more, More preferably, it is 0.16 mass% or more, More preferably, 0.5 mass% or more, More preferably, it is 0.8 mass% or more, Preferably it is 5 mass% or less, More preferably, it is 3 mass% or less, More preferably, it is 2 mass% or less, More preferably, it is 1.82 mass% Hereinafter, More preferably, it is 1.5 mass% or less, More preferably, it is 1.2 mass% or less, The oil-in-water emulsion composition in any one of <1>-<7>.

The total content of the <9> component (A) and the component (B) becomes like this. Preferably it is 0.5 mass% or more, More preferably, it is 1.2 mass% or more, More preferably, it is 1.8 mass% or more, Preferably it is 6 The oil-in-water emulsion composition as described in any one of <1>-<8> which is mass% or less, More preferably, it is 3.5 mass% or less, More preferably, it is 2.5 mass% or less.

The content mass ratio [(A) / (B)] of component (A) to <10> component (B) becomes like this. Preferably it is 0.06 or more, More preferably, it is 0.08 or more, More preferably, it is 0.10 or more, More preferably Is 0.5 or more, More preferably, it is 18 or less, More preferably, it is 14 or less, More preferably, it is 10 or less, More preferably, it is 3 or less, The oil-in-water type emulsion composition in any one of <1>-<9>. .

The powder used for the hydrophobized powder of <11> component (C), Preferably it is any one of <1>-<10> which is 1 or more types chosen from zinc oxide, titanium oxide, cerium oxide, iron oxide, and chromium oxide. Oil-in-water emulsion composition as described in

The average particle diameter of the powder used for the hydrophobized powder of <12> component (C) becomes like this. Preferably it is 0.01 micrometer or more, More preferably, it is 0.012 micrometer or more, More preferably, it is 0.015 micrometer or more, Preferably it is 28 The oil-in-water emulsion composition as described in any one of <1>-<11> which is micrometer or less, More preferably, it is 23 micrometers or less, More preferably, it is 18 micrometers or less.

The hydrophobization treatment to the <13> powder is preferably a fluorine compound treatment, a silicone treatment, a silicone resin treatment, a pendant treatment, a silane coupling agent treatment, a titanate coupling agent treatment, an emulsion treatment, an acylamino acid metal salt treatment, and a polyacrylic acid treatment. 1 or 2 or more types selected from metal soap treatment, crystalline cellulose treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, silane compound treatment and silazane compound treatment, more preferably using silicone or silicone resin Hydrophobization treatment using hydrophobization treatment, methylhydrogenpolysiloxane or methylhydrogenpolysiloxane-dimethylpolysiloxane copolymer represented by the following general formula (1), hydrophobization treatment using silane compound or silazane compound, hydrophobization treatment using titanate coupling agent And hydrophobization using acylamino acid metal salts 1 or 2 or more selected from li, more preferably hydrophobization treatment with methylhydrogenpolysiloxane, hydrophobization treatment with silane compound or silazane compound, hydrophobization treatment with titanate coupling agent and acylamino acid metal salt The oil-in-water emulsion composition in any one of <1>-<12> which is 1 type, or 2 or more types chosen by hydrophobization treatment.

[Formula 2]

The coating amount of the hydrophobization treatment agent to the <14> powder is preferably 1% by mass or more, more preferably 1.5% by mass or more, and more preferably 10% by mass or less, more preferably based on the total amount of the powder used. The oil-in-water emulsion composition as described in any one of <1>-<13> which is 5 mass% or less.

Content of <15> component (C) becomes like this. Preferably it is 0.1 mass% or more, More preferably, it is 1 mass% or more, More preferably, it is 5 mass% or more, More preferably, it is 30 mass% or less, More preferable Preferably, it is 20 mass% or less, More preferably, it is 15 mass% or less, The oil-in-water type emulsion composition in any one of <1>-<14>.

Content of <16> water becomes like this. Preferably it is 40 mass% or more, More preferably, it is 45 mass% or more, Preferably it is 80 mass% or less, More preferably, it is 75 mass% or less in <1>-<15>. The oil-in-water emulsion composition of any one of Claims.

<17> Preferably, the oil-in-water emulsion composition in any one of <1>-<16> containing liquid oil as a component (E) further.

The oil-in-water emulsion composition as described in <17> whose liquid oil of <18> component (E) is an oily agent which has fluidity at 25 degreeC preferably under 1013.25 hPa.

<19> component (E) contains 1 type (s) or 2 or more types chosen from 2-methoxyhexyl paramethoxy cinnamic acid, 2-ethylhexyl salicylic acid, homomentyl salicylate, octocrylene, and dimethicodiethyl benzalmalonate. The oil-in-water emulsion composition as described in <17> or <18> which is liquid oil to be mentioned.

Content of <20> component (E) becomes like this. Preferably it is 5 mass% or more, More preferably, it is 8 mass% or more, More preferably, it is 10 mass% or more, More preferably, it is 25 mass% or less, More preferably, The oil-in-water emulsion composition as described in any one of <17>-<19> which is 20 mass% or less, More preferably, it is 18 mass% or less.

<17> <17> whose content mass ratio of the liquid organic ultraviolet absorber in <21> all components (E) becomes like this. Preferably it is 0.3 or more, More preferably, it is 0.5 or more, More preferably, it is 0.6 or more, More preferably, it is 0.7 or more. The oil-in-water emulsion composition in any one of <20>.

<22> Preferably, the oil-in-water emulsion composition in any one of <1>-<21> containing a solid ultraviolet absorber at 25 degreeC as a component (F) further.

Content of <23> component (F) becomes like this. Preferably it is 0.5 mass% or more, More preferably, it is 1 mass% or more, More preferably, it is 1.5 mass% or more, More preferably, it is 10 mass% or less, More preferably Preferably it is 7.5 mass% or less, More preferably, it is 5 mass% or less, The oil-in-water type emulsion composition in any one of <1>-<22>.

<24> Preferably, the oil-in-water emulsion composition as described in any one of <1>-<23> which contains a water-soluble polymer further as a component (G).

<25> component (G) becomes like this. Preferably a carboxyvinyl polymer, an acrylic acid methacrylate copolymer, a xanthan gum, hydroxypropyl methylcellulose, polyacrylamide, (acrylic acid Na / acryloyl dimethyl taurine Na) It contains a polymer, (acryloyl dimethyl taurine ammonium / VP) copolymer, and 1 or more types chosen from hyaluronic acid or its alkali metal salt, More preferably, polyacrylamide, (acrylic acid Na / acryloyl dimethyl taurine Na) The oil-in-water type emulsion composition as described in <24> which contains 1 or more types chosen from a) copolymer, a (acryloyl dimethyl taurine ammonium / VP) copolymer, and a xanthan gum.

Content of <26> component (G) becomes like this. Preferably it is 0.01 mass% or more, More preferably, it is 0.05 mass% or more, More preferably, it is 0.1 mass% or more, More preferably, it is 4 mass% or less, More preferably, Is 2 mass% or less, More preferably, it is 1.5 mass% or less, The oil-in-water type emulsion composition as described in <24> or <25>.

<27> The oil-in-water emulsion composition according to any one of <1> to <26>, which preferably contains a saturated monohydric alcohol having 1 to 3 carbon atoms as the component (H).

Content of <28> component (H) becomes like this. Preferably it is 1 mass% or more, More preferably, it is 3 mass% or more, More preferably, it is 5 mass% or more, More preferably, it is 20 mass% or less, More preferably, Is 15 mass% or less, More preferably, it is 12 mass% or less, The oil-in-water type emulsion composition as described in <27>.

<29> The oil-in-water emulsion composition according to any one of <1> to <28>, which preferably contains a polyhydric alcohol as component (I).

<30> Component (I), Preferably it contains 1 type, or 2 or more types chosen from ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1, 3- butylene glycol, glycerin, and diglycerol The oil-in-water emulsion composition as described in <29> which is a polyhydric alcohol, More preferably, it is a polyhydric alcohol containing 1 type (s) or 2 or more types chosen from propylene glycol, dipropylene glycol, 1, 3- butylene glycol, and glycerin.

Content of <31> component (I) becomes like this. Preferably it is 0.1 mass% or more, More preferably, it is 0.5 mass% or more, More preferably, it is 1 mass% or more, More preferably, it is 12 mass% or less, More preferably, The oil-in-water emulsion composition as described in <29> or <30> which is 8 mass% or less, More preferably, it is 5 mass% or less, More preferably, it is 3 mass% or less.

The average emulsified particle diameter of the <32> oil-in-water type emulsion composition becomes like this. Preferably it is 1 micrometer or more, Preferably it is 30 micrometers or less, More preferably, it is 25 micrometers or less, More preferably, it is <1>-<31> which is 20 micrometers or less. The oil-in-water emulsion composition according to any one of claims.

<33> Use as oil external preparation of the oil-in-water emulsion composition in any one of <1>-<32>.

Example

Examples 1-13, Comparative Examples 1-11

The oil-in-water emulsion composition was prepared according to the prescription shown in Tables 1-5.

(Production method)

Process a: The components 1-9 and 16-20 are mixed uniformly, it heats at 80 degreeC, and is made to melt | dissolve.

Process b: The components 10-15 are disperse | distributed uniformly.

Step c: The preparation of step b is added to the preparation of step a, uniformly mixed, heated to 80 ° C., and dispersed.

Process d: The components 21-30 are heated and melt | dissolved at 40 degreeC, and it mixes uniformly after natural cooling to 25 degreeC.

Process e: The preparation of process c is added, stirring the preparation of process d, and it mixes uniformly with a homo mixer.

The component (C) used in the Example is demonstrated below.

ASI treated titanium oxide (manufactured by Daito Chemical Co., Ltd.)

It is coated with 1.5 mass% of isopropyl triisostearoyl titanate, 0.42 mass% of sodium lauroyl aspartate, and 0.08 mass% of zinc chloride with respect to 98 mass% of titanium oxides (approximately spherical shape, average particle diameter 0.2 micrometer). .

ASI-treated iron oxide (manufactured by Daito Chemical Co., Ltd.)

1.5 mass% of isopropyl triisostearoyl titanate, 0.42 mass% of sodium lauroyl aspartates, and 0.08 mass of zinc chloride with respect to 98 mass% of iron oxides (acicular, average particle diameter (length) 0.9 micrometer, average width 0.08 micrometer) Coated with%.

ASI treated talc (manufactured by Daito Chemical Co., Ltd.)

About 98 mass% of talc (plate shape, 15 micrometers of average particle diameters, 0.25 micrometers of average thickness), 1.5 mass% of isopropyl triisostearoyl titanates, 0.42 mass% of sodium lauroyl aspartate, and 0.08 mass% of zinc chloride Processed.

OTS treated titanium oxide

A slurry consisting of 97 parts by mass of titanium oxide powder (approximately spherical, average particle diameter of 0.2 µm), 3 parts by mass of octyltriethoxysilane, and toluene was prepared, and a bead mill (Din Mill manufactured by Shinmaru Enterprises, Inc.) was used. Crushing and pulverization were performed. Subsequently, after distilling off toluene under reduced pressure, it heat-processed at 150 degreeC for 4 hours using the ventilation airflow type dryer, and obtained the octyl triethoxysilane-treated titanium oxide powder.

OTS treated flaky zinc oxide

A slurry consisting of 97 parts by mass of flaky zinc oxide particles (average particle diameter 0.3 µm, average particle thickness 0.032 µm, platelet ratio 9, iron element content 0.01 mol%), 3 parts by mass of octyltriethoxysilane, and toluene was prepared. The grinding | pulverization and disintegration were performed using the bead mill (Dino Mill by Shinmaru Enterprises Co., Ltd.). Subsequently, after distilling off toluene under reduced pressure, it heat-processed at 150 degreeC for 4 hours using the ventilation airflow type dryer, and obtained the octyl triethoxysilane treatment flaky zinc oxide powder.

OTS treated iron oxide

A slurry consisting of 97 parts by mass, 3 parts by mass of octyl triethoxysilane, and toluene was prepared, and a bead mill (manufactured by Shinmaru Enterprises Co., Ltd.) was prepared. Pulverization and pulverization using a dino mill). Subsequently, the toluene was heat-distilled off under reduced pressure, and it heat-processed at 150 degreeC for 4 hours using the ventilation air flow type dryer, and obtained the octyl triethoxysilane treatment fine particle iron oxide powder.

SI treated zinc oxide

A slurry consisting of 97 parts by mass of fine particle zinc oxide powder (approximately spherical, average particle diameter of 0.017 μm), 3 parts by mass of methylhydrogenpolysiloxane (KF-99P, manufactured by Shin-Etsu Chemical Co., Ltd.) and isopropyl alcohol was prepared, and stirred and pulverized well. Then, the solvent was distilled off under reduced pressure and heat-processed at 160 degreeC in air for 4 hours, and the methylhydrogen polysiloxane surface-treated fine particle zinc oxide powder was obtained.

About the oil-in-water emulsion composition (sample) shown in Tables 1-5, various evaluation was performed according to the following methods and criteria, and the result was shown together in Tables 1-5.

[Emulsification Stability (High Temperature Stability) Evaluation]

The sample was put into a glass bottle, and each sample was left still for 1 month in a 60 degreeC thermostat. Based on the state immediately after manufacture, the external appearance change after one month was determined based on the following criteria by visual observation and microscopic observation (measured magnification 100 times).

(Criteria)

A: Appearance change is not recognized in any of observation by visual observation and a microscope.

B: No change in appearance was observed in the observation by visual observation, but the union of the emulsified particles was confirmed in the observation by the microscope as a whole.

X: Appearance change (separation, creaming, etc.) was confirmed by visual observation.

[Shear resistance evaluation]

Shear was applied to the sample under the following conditions using a rheometer (Physica MCR301; manufactured by Anton Paar), and the following viscosity change rate was measured. In addition, microscopic observation (measured magnification 100 times) of the sample before and after applying shear was performed, and external appearance was performed together. From these results, evaluation was performed based on the following criteria.

Measurement conditions: steady flow measurement mode, shear rate: 17 (1 / s), plate: PP25, measurement time: 300 seconds (measurement interval 15 seconds), measurement temperature 25 ℃

Viscosity change rate = (shear viscosity at 300 seconds at the start of measurement) / (shear viscosity at 15 seconds at the start of measurement)

(Criteria)

A: The viscosity change rate is 0.8 or more, and the unity of emulsified particle | grains is not confirmed by observation under a microscope.

B: Viscosity change rate is 0.8 or more, and the unity of emulsified particle | grains was confirmed by observation with a microscope.

X: viscosity change rate is less than 0.8

[Evaluation (Sensory Evaluation)]

Ten expert panelists were made to use a sample, and the evaluation was performed by the number of people who answered that it felt moist after application | coating.

[Ultraviolet ray defense ability evaluation]

The sample was uniformly applied on a PMMA plate at an application amount of 1.3 mg / cm 2 and dried. Then, SPF value (in vitro) was measured using the SPF analyzer (UV-2000S; Labsphere Co., Ltd.), and evaluation was performed based on the following evaluation criteria.

(Evaluation standard)

A: SPF value is over 40

B: SPF value is more than 30 and less than 40

C: SPF value is 20 or more and less than 30

X: SPF value is less than 20

* 1: Nikko BB-2, manufactured by Nippon Suspectant Co., Ltd.

* 2: Nikko BB-5, manufactured by Nippon Suspectant Co., Ltd.

* 3: Nikcall BC-2, manufactured by Nippon Suspectant Ind.

* 4: Nikcall BS-2, manufactured by Nippon Suspectant Co., Ltd.

* 5: Nikcall BL-2, manufactured by Nippon Suspectant Ind.

* 6: Phospholipid PCSH70, manufactured by Nippon Purification Co., Ltd., phosphatidylcholine content 70% by mass or more

* 7: COATSOME NC-21, Nichiyu Co., Ltd., phosphatidylcholine content of 90% by mass or more

* 8: Sphingolipid E, manufactured by Kao Corporation

* 9: Ubinal T-150, manufactured by BASF

* 10: Manufactured by UNION A PLUS GURANULAR, BASF

* 11: Manufactured by Ubunal MC80, BASF

* 12: Salacos 913, manufactured by Nissin Oilio Group

* 13: Silicon FK96-6cs, manufactured by Shin-Etsu Chemical Co., Ltd.

* 14: SIMULGEL EG (net equivalent), manufactured by SEPPIC

* 15: Eco gum, made by DSP Kokyo Food & Chemical Co., Ltd.

Hereinafter, the prescription example of this invention is shown. In all, the effect equivalent to an Example is exhibited.

Prescription 1 (not oil-based makeup)

Content (mass%)

Behenes-2 (* 1) 1.0

Hydrogenated Lecithin (* 6) 1.0

ASI treated titanium oxide 10.5

ASI Treated Iron Oxide 1.05

ASI Treatment Talc 0.8

Paramethoxycinnamic acid 2-ethylhexyl (* 11) 5.0

2- (4-Diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester (* 10) 2.0

2,4-bis [[4- (2-ethylhexyloxy) -2-hydroxy] -phenyl] -6- (4-methoxyphenyl) -1,3,5-triazine (* 16) 0.5

2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine (* 9) 2.0

Isononanoate isononyl (* 12) 3.0

Sebacic acid isopropyl 2.0

Dimethicone (* 13) 0.5

EDTA-2Na 0.02

glycerin 0.5

ethanol 10.0

Seaweed Extract (* 17) 0.1

Hydrolyzed Collagen (* 18) 0.1

Royal Jelly Extract (* 19) 0.1

Yulmu Seed Extract (* 20) 0.1

(Naacrylic Acid / Acryloyldimethyltaurine Na) Copolymer (* 14) 0.86

1,3-butylene glycol 1.0

Hyaluronic acid Na (* 21) 0.01

Xanthan Gum (* 15) 0.1

Isohexadecane 0.52

Polysorbate 80 0.17

Oleic acid sorbitan 0.06

Purified water Remaining amount

* 16: BASF company: Tinosorb S

* 17: Maruzen Pharmaceutical Co., Ltd. manufacture: Seaweed Extract M

* 18: Seiwa Hwaseong Co., Ltd.: Promois WU-32R

* 19: Ichimaru Parcos, Inc.: Royal Jelly Extract

* 20: Maruzen Pharmaceutical Company: Yulmu Rice Extract BG-S

* 21: Kikoman Bio Chemipasa Co., Ltd .: hyaluronic acid FCH-SU

Prescription Example 2 (Oil Type Sunscreen)

Content (mass%)

Behenes-2 (* 1) 0.5

Hydrogenated Lecithin (* 6) 1.5

OTS Treatment Flaky Zinc Oxide 2.5

SI treated zinc oxide 7.5

Polysilicon-15 (* 22) 1.0

2- (4-Diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester (* 10) 1.5

2,4-bis [[4- (2-ethylhexyloxy) -2-hydroxy] -phenyl] -6- (4-methoxyphenyl) -1,3,5-triazine (* 16) 1.5

2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine (* 9) 2.0

Dicapric acid neopentyl glycol 2.5

Sebacic acid isopropyl 5.0

Alkyl benzoate (C12-15) 2.5

Dimethicone (* 13) 1.0

Glycyretinate Stearyl (* 23) 0.1

EDTA-2Na 0.02

glycerin 3.0

DPG 2.0

ethanol 5.0

Phenoxyethanol 0.3

Chlorphenesin 0.2

Chili Pepper Flower / Leaf / Stem Extract (* 24) 0.1

Olive Leaf Extract (* 25) 0.1

(Naacrylic Acid / Acryloyldimethyltaurine Na) Copolymer (* 14) 0.83

Isohexadecane 0.5

Polysorbate 80 0.17

Oleic acid sorbitan 0.06

1,3-butylene glycol 2.0

Xanthan Gum (* 15) 0.1

Purified water Remaining amount

* 22: DSM Nutritional Products, Inc.: Parsol SLX

* 23: Maruzen Pharmaceutical Co., Ltd.: Siogretinol

* 24: Ichimaru Parcos Co., Ltd.: Parco Rex pepper sprout B

* 25: Maruzen Pharmaceutical Company: Olive Leaf Extract BG

Claims (6)

The oil-in-water emulsion composition containing following component (A)-(D) and whose content mass ratio [(A) / (B)] of component (A) with respect to component (B) is 0.06 or more and 18 or less.
(A) Polyoxyethylene alkyl ether or polyoxyethylene alkenyl ether whose carbon number of an alkyl group or alkenyl group is 20 or more and 24 or less and the average added mole number of ethylene oxide is 1.5 or more and 4 or less.
(B) phosphorus lipid
(C) hydrophobized powder
(D) water The method of claim 1,
The oil-in-water emulsion composition whose sum total content of a component (A) and a component (B) is 0.5 mass% or more and 6 mass% or less. The method according to claim 1 or 2,
Furthermore, oil-in-water emulsion composition containing liquid oil as a component (E). The method of claim 3, wherein
Liquid which the said component (E) contains 1 type (s) or 2 or more types chosen from 2-methoxyhexyl paramethoxycinnamic acid, 2-ethylhexyl salicylic acid, homomentyl salicylate, octocrylene, and dimethicodiethyl benzalmalonate Attracted oil-in-water emulsion composition. The method according to any one of claims 1 to 4,
Furthermore, the oil-in-water emulsion composition containing a solid ultraviolet absorber at 25 degreeC as a component (F). Use as an external preparation for skin of the oil-in-water emulsion composition according to any one of claims 1 to 5.