KR20220104009A - Cosmetic composition in the form of W/O emulsion comprising spherical hydrophobic silica airgel and ester oil - Google Patents

Abstract

The present invention relates to at least one spherical hydrophobic silica airgel, and a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoacid or polyacid and a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoalcohol or polyalcohol. It relates to a cosmetic composition in the form of a water-in-oil emulsion comprising at least one ester oil selected from liquid esters of The cosmetic composition is stable for a long time even if the spherical hydrophobic silica airgel is included in a large amount in the composition.

Description

Cosmetic composition in the form of W/O emulsion comprising spherical hydrophobic silica airgel and ester oil

The present invention relates to at least one spherical hydrophobic silica airgel, and a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoacid or polyacid and a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoalcohol or polyalcohol. It relates to a cosmetic composition in the form of a water-in-oil emulsion comprising at least one ester oil selected from liquid esters, and to a cosmetic composition stable for a long time even if a large amount of spherical hydrophobic silica airgel is included in the composition.

Long-lasting properties are one of the most important factors in cosmetic compositions, especially foundations. To achieve long lasting properties, film formers such as MQ resins are used in combination with certain combinations of fillers. However, most fillers used in cosmetic compositions are synthetic organic polymers classified into microplastics, such as PMMA, nylon, and polyurethane. Because of the risk of causing environmental damage caused by microplastics, there is a need to replace synthetic organic polymers with more environmentally friendly fillers derived from natural materials, such as silica.

Therefore, silica silylate airgel particles, such as VM-2270 airgel microparticles sold by Dow Corning, are currently used in cosmetic compositions. These particles can absorb large amounts of sebum and are suitable for use in foundations. However, these particles do not have a fixed shape. Because of this irregular shape, these particles are included in a large amount in the cosmetic composition, and the texture is very bad.

Spherical silica silylate airgel particles have been recently developed, and it is suggested that these particles impart a matte effect and good softness to a cosmetic composition while maintaining high oil absorption (JP-A-2014-088307, JP-A- 2014-218433, and JP-A-2018-177620). However, when the spherical silica silylate airgel particles are used in a large amount in a cosmetic composition, there is a disadvantage that the composition becomes unstable.

Therefore, there is a need to provide a cosmetic composition comprising spherical airgel particles that can achieve long-lasting stability, for example, spherical silica silylate airgel particles.

It is an object of the present invention to provide a cosmetic composition comprising a spherical hydrophobic silica airgel that is stable for a long time.

The above object is to provide at least one spherical hydrophobic silica airgel, and a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoacid or polyacid with a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoalcohol or polyalcohol It can be achieved by a cosmetic composition in the form of a W / O emulsion, comprising at least one ester oil selected from liquid esters of

The spherical hydrophobic silica airgel may be a spherical hydrophobic airgel of silica silylate.

The spherical hydrophobic silica airgel is 0.8 or more, preferably 0.82 or more, less than 1, preferably 0.99 or less, more preferably 0.98 or less, still more preferably 0.97 or less, even more preferably 0.96 or less, particularly preferably preferably have an average roundness determined by image analysis of 0.95 or less.

The spherical hydrophobic silica airgel is 2 ml/g or more, preferably 3 ml/g or more, more preferably 4 ml/g, most preferably 5 ml/g or more, and 12 ml/g or less, preferably 11 mL/g or less, more preferably 10 mL/g or less, and most preferably 8 mL/g or less, as measured at the wet point.

The spherical hydrophobic silica gel is 200 m 2 /g or more, preferably 400 m 2 /g or more, more preferably 500 m 2 /g or more, 1,200 m 2 /g or less, preferably 1,000 m 2 /g or less, more preferably It may have a specific surface area determined by the BET method of 800 m 2 /g or less.

The spherical hydrophobic silica gel is 1 ml/g or more, preferably 2 ml/g or more, more preferably 3 ml/g or more, 10 ml/g or less, preferably 8 ml/g or less, more preferably It may have a pore volume determined by the BJH method of 7 ml/g or less.

The spherical hydrophobic silica gel is 5 nm or more, preferably 10 nm or more, more preferably 12 nm or more, and 50 nm or less, preferably 30 nm or less, more preferably 25 nm or less, determined by the BJH method. It may have a peak pore radius of

The spherical hydrophobic silica gel may have an average particle size of 0.5 μm or more, preferably 1 μm or more, more preferably 2 μm or more, and 30 μm or less, preferably 20 μm or less, more preferably 15 μm or less. have.

The spherical hydrophobic silica airgel is 0.05% by weight or more, preferably 0.1% by weight or more, more preferably 0.3% by weight or more, most preferably 0.5% by weight or more, and 15% by weight or less, preferably, based on the total weight of the composition Preferably it may be present in an amount of up to 10% by weight, more preferably up to 5% by weight, and most preferably up to 2% by weight.

The ester oil may be a liquid ester of saturated and linear C ₅ -C ₁₅ aliphatic diacids with saturated and branched C ₂ -C ₅ aliphatic monoalcohols, preferably diisopropyl sebacate.

The ester oil is 0.05% by weight or more, preferably 0.1% by weight or more, more preferably 1% by weight or more, 15% by weight or less, preferably 10% by weight or less, more preferably, based on the total weight of the composition. It may be present in an amount up to 5% by weight.

The cosmetic composition according to the present invention may be a skin makeup composition, preferably a foundation.

The present invention also relates to a method for preparing a cosmetic composition in the form of a W/O emulsion comprising:

- preparing an oil phase by mixing an oily component comprising at least one spherical hydrophobic silica airgel and at least one ester oil, wherein the at least one ester oil is a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic selected from liquid esters of monoacids or polyacids with saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoalcohols or polyalcohols;

- preparing an aqueous phase; and

- adding or injecting an aqueous phase to the oil phase while stirring the oil phase.

The present invention also relates to a cosmetic method for a keratinous material, for example the skin, comprising the step of applying a cosmetic composition according to the invention to the keratinous material.

As a result of intensive examination, the present inventors have found that spherical hydrophobic silica airgels and saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoacids or polyacids and saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoalcohols or It has been found that by combining an ester oil selected from liquid esters of polyalcohols, it is possible to improve the stability of the composition in the form of a W/O emulsion, even if the spherical hydrophobic silica airgel is present in a large amount in the cosmetic composition.

Accordingly, one aspect of the present invention provides at least one spherical hydrophobic silica airgel, and a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoacid or polyacid and saturated or unsaturated linear or branched C ₁ -C ₂₆ It is a cosmetic composition in the form of a W/O emulsion comprising at least one ester oil selected from liquid esters of aliphatic monoalcohols or polyalcohols.

Hereinafter, the composition according to the present invention will be described in more detail.

[Spherical Hydrophobic Silica Airgel]

The composition according to the invention comprises at least one spherical hydrophobic silica airgel.

Airgel is a material with high porosity. Here, the silica airgel generally refers to a solid silica having a porous structure obtained by replacing the medium contained in the wet silica gel with air by drying the wet silica gel while maintaining the solid network structure of the silica. Porosity is the amount of air contained in the apparent volume of a material, expressed as a percentage by volume. The spherical hydrophobic silica airgel of the present invention may have a porosity of 60% or more, preferably 70% or more, more preferably 80% or more.

The hydrophobic silica airgel of the present invention is characterized in that the shape of each particle is spherical. Because of this spherical shape, the hydrophobic silica airgel can provide a cosmetic composition with good softness. The sphericity of the hydrophobic silica airgel can be determined by the average roundness.

The spherical hydrophobic silica airgel of the present invention may have an average roundness of 0.8 or more, preferably 0.82 or more. The spherical hydrophobic silica airgel may have an average roundness of less than 1, preferably 0.99 or less, more preferably 0.98 or less, even more preferably 0.97 or less, even more preferably 0.96 or less, most preferably 0.95 or less. have.

"Average roundness" can be determined by image analysis. In particular, "average roundness" is the roundness obtained by image analysis of scanning electron microscope (SEM) images of more than 2000 airgel particles observed at 1000 magnification, by secondary electron detection using a scanning electron microscope (SEM). may be the arithmetic mean of

The "roundness" of each airgel particle is a value determined by the formula:

C=4πS/L ²

where C represents the roundness, S represents the area (projected area) of the airgel particles in the image, and L represents the length of the perimeter (perimeter) of the airgel particles in the image. When the average roundness is close to 1, the shape of each particle becomes more spherical.

In the spherical hydrophobic silica airgel of the present invention, the term "hydrophobic" means that the silica airgel particles are difficult to disperse in water. More specifically, this term means that after adding 1 g of silica airgel particles and 100 g of ion-exchanged water to a bottle, stirring the bottle for at least 10 seconds, and standing the bottle, the airgel phase and the water phase are completely separated. Thus, in one particular embodiment of the present invention, the spherical hydrophobic silica airgel does not exhibit absorbency.

The spherical hydrophobic silica airgels that can be used according to the invention are preferably of the silylated silica type (INCI name: Silica Silylate). Most preferably, the spherical hydrophobic silica airgel may be one described in JP-A-2014-088307, JP-A-2014-218433, or JP-A-2018-177620.

Hydrophobicity causes the hydrophobicizing agent to be present on the surface of the silica by the formula:

≡Si-OH

(wherein the symbol "≡" represents the remaining three valences of the Si atom) is reacted with a silanol group represented by the following formula:

(≡Si-O-) _(4-n) SiR _n

(wherein n is an integer of 1 to 3; each R is independently a hydrocarbyl group; two or more Rs may each be the same or different, wherein n is 2 or more) .

The hydrophobizing agent may be a silylating agent. Therefore, according to a preferred embodiment, in the spherical hydrophobic silica airgel, the silica particles may be modified on the surface by silylation. As an example of a silylating agent, the processing agent which has one of following formula (1)-(3) is mentioned.

Equation (1):

R _n SiX _(4-n)

wherein n represents 1 to 3; R represents a hydrocarbyl group; X represents a group (that is, a leaving group) capable of leaving a molecule by cleavage of a bond with an Si atom during a reaction with a compound having a hydroxyl group; Each R may be different, wherein n is 2 or more; Each X may be different, wherein n is 2 or less.

Equation (2):

wherein R ¹ is an alkylene group; R ² and R ³ independently represent a hydrocarbyl group; R ⁴ and R ⁵ independently represent a hydrogen atom or a hydrocarbyl group.

Equation (3):

wherein R ⁶ and R ⁷ independently represent a hydrocarbyl group; m represents an integer from 3 to 6; when there are two or more R ⁶ , each R ⁶ may be different; When there are two or more R ⁷ , each R ⁷ may be different.

In the formula (1), R is a hydrocarbyl group, preferably a hydrocarbyl group having 1 to 10 carbon atoms, more preferably a hydrocarbyl group having 1 to 4 carbon atoms, particularly preferably a methyl group.

Examples of the leaving group represented by X include halogen atoms such as chlorine and bromine; alkoxy groups such as a methoxy group and an ethoxy group; The group represented by -NH-SiR ₃ (in formula, the definition of R is the same as that of R in formula (1)) is mentioned.

Specific examples of the hydrophobicizing agent represented by the formula (1) include the following:

chlorotrimethylsilane, dichlorodimethylsilane, trichloromethylsilane, monomethyltrimethoxysilane, monomethyltriethoxysilane, and hexamethyldisilazane.

Most preferably, from the viewpoint of preferred reactivity, chlorotrimethylsilane, dichlorodimethylsilane, trichloromethylsilane, and/or hexamethyldisilazane may be used.

The number of bonds between the Si atom and the silanol group on the silica skeleton varies depending on the number of leaving groups X (4-n). For example, when n is 2, the following bonds can occur:

(≡Si-O-) ₂ SiR ₂ .

When n is 3, the following bonds can occur:

≡Si-O-SiR ₃ .

In this way, the silanol group can be silylated, thereby undergoing hydrophobization.

In the formula (2), R ¹ may be an alkylene group, preferably an alkylene group having 2 to 8 carbon atoms, particularly preferably an alkylene group having 2 to 3 carbon atoms.

In the formula (2), R ² and R ³ are independently a hydrocarbyl group, and the same preferred groups as R in the formula (1) are exemplified. ^R4 represents a hydrogen atom or a hydrocarbyl group, and when ^R4 is a hydrocarbyl group, the same preferable group as R in Formula (1) is mentioned. When the silica gel is treated with the compound (cyclic silazane) represented by formula (2), cleavage of the Si-N bond may occur by reaction with the silanol group, and therefore, on the surface of the silica skeleton in the gel, the following Binding can occur:

(≡Si-O-) ₂ SiR ² R ³ .

In this way, the silanol group can be silylated by the cyclic silazane of formula (2), whereby hydrophobization can proceed.

Specific examples of the cyclic silazane represented by the formula (3) include hexamethylcyclotrisilazane and octamethylcyclotetrasilazane.

In the formula (3), R ⁶ and R ⁷ each independently represent a hydrocarbyl group, and the same preferred groups as R in the formula (2) are exemplified. m represents the integer of 3-6. When silica gel is treated with a compound represented by formula (3) (cyclic siloxane), the following bonds may occur on the surface of the silica backbone in the gel:

(≡Si-O-) ₂ SiR ⁶ R ⁷ .

In this way, the silanol group can be silylated by the cyclic siloxane of formula (3), whereby hydrophobization can proceed.

Specific examples of the cyclic siloxane represented by the formula (3) include hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane.

Spherical hydrophobic silica airgel is used to prepare silica sol, convert sol to gel, age the gel, wash the aged gel, replace the water in the washed gel with a solvent, treat the gel with a hydrophobizing agent, and make hydrophobic It can be prepared by drying the silica.

The spherical hydrophobic silica airgel may have a specific surface area determined by the BET method of 200 m 2 /g or more, preferably 400 m 2 /g or more, more preferably 500 m 2 /g or more, and 1,200 m 2 /g or less, preferably may have a specific surface area determined by the BET method of 1,000 m 2 /g or less, more preferably 800 m 2 /g or less.

In the present invention, the "specific surface area determined by the BET method" is after drying the measurement sample for 3 hours or more at 200°C under a reduced pressure of 1 kPa or less; measuring the adsorption isotherm of the nitrogen adsorption side only at the liquid nitrogen temperature; It means a value determined by analyzing the adsorption isotherm by the BET method. The pressure range used in the analysis is a relative pressure of 0.1 to 0.25.

The spherical hydrophobic silica airgel may have a pore volume determined by the BJH method of 1 ml/g or more, preferably 2 ml/g or more, more preferably 3 ml/g or more, and 10 ml/g or less, preferably may have a pore volume determined by the BJH method of 8 ml/g or less, more preferably 7 ml/g or less. The spherical hydrophobic silica airgel may have a peak pore radius determined by the BJH method of 5 nm or more, preferably 10 nm or more, more preferably 12 nm or more, and 50 nm or less, preferably 40 nm or less, more preferably It may have a peak pore radius determined by the BJH method of 30 nm or less.

"The pore volume determined by the BJH method" is defined by the BJH method (Barrett, E.P.; Joyner, L.G.; Halenda, P.P., J. Am. Chem. Soc. 73, 373 (1951)) by the above "BET method" Refers to the pore volume derived from pores having a pore radius of 1 nm to 100 nm obtained by analyzing the adsorption isotherm on the nitrogen adsorption side obtained in the same manner as described in "Specific surface area determined by "Peak pore radius determined by the BJH method" is by the BJH method, by analyzing the adsorption isotherm on the nitrogen adsorption side obtained in the same manner as above, the derivative of the cumulative pore volume by the logarithm of the pore radius obtained is the vertical axis, , refers to the value of the pore radius giving the peak in the pore distribution curve (volume distribution curve) plotted with the pore radius as the abscissa axis.

The spherical hydrophobic silica airgel may have an average particle size of 0.5 μm or more, preferably 1 μm or more, more preferably 2 μm or more, and 30 μm or less, preferably 20 μm or less, more preferably 15 μm or less. It may have an average particle size by image analysis.

Here, the “average particle size” may be measured by an image analysis method. Specifically, the value of "average particle size" is a value of a scanning electron microscope (SEM) image of more than 2000 airgel particles observed at 1000 magnification, for example, by secondary electron detection using a scanning electron microscope (SEM). It is the arithmetic mean of equivalent circle diameters obtained by image analysis. The "equivalent circle diameter" of each airgel particle is the diameter of a circle having an area equal to the area (projected area) of the airgel particle in the image.

Preferably, the spherical hydrophobic silica airgel can be measured at a wetting point of at least 2 ml/g, preferably at least 3 ml/g, more preferably at least 4 ml/g, and most preferably at least 5 ml/g. It may have an oil absorption capacity, and the oil absorption capacity measured at a wet point of 12 ml/g or less, preferably 11 ml/g or less, more preferably 10 ml/g or less, and most preferably 8 ml/g or less. can have

The oil absorption capacity, measured at the wet point, recorded as Wp, corresponds to the amount of oil that needs to be added to 100 g of particles to obtain a homogeneous paste. It can be measured according to the wet point method or the method for determining the oil absorption of powder described in standard NF T 30-022. The oil absorption may correspond to the amount of oil adsorbed on and/or absorbed by the powder on the usable surface of the powder, as determined by the measurement of the wet point described below.

The powder in an amount of m=2 g is placed on a glass plate, and oil (eg, ester oil, oleic acid, or silicone oil) is added in the form of drops. After adding 4 to 5 drops of oil to the powder, mixing is performed using a spatula, and the addition of oil is continued until agglomerates of oil and powder are formed. At this point, the oil is added dropwise and then the mixture is ground with a spatula. When a hard and smooth paste is obtained, the addition of oil is stopped. This paste should be able to spread on a glass plate without cracking or forming lumps. Then, the volume Vs (expressed in ml) of oil used is recorded. The oil absorption corresponds to the ratio Vs/m.

Alternatively, the oil absorption ability can be measured in accordance with JIS-K6217-4.

In one preferred embodiment of the present invention, (a) the spherical hydrophobic silica airgel is as described in JP-A-2014-088307, JP-A-2014-218433, or JP-A-2018-177620.

The spherical hydrophobic silica airgel may be present in an amount of at least 0.05 wt%, preferably at least 0.1 wt%, more preferably at least 0.3 wt%, and most preferably at least 0.5 wt%, based on the total weight of the composition, and 15 wt% % or less, preferably 10 wt% or less, more preferably 5 wt% or less and most preferably 4 wt% or less.

[Ester Oil]

The composition according to the invention is selected from liquid esters of saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoacids or polyacids with saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoalcohols or polyalcohols. at least one ester oil.

In the context of the present invention, the term "oil" means a fatty substance which is in liquid form at room temperature and atmospheric pressure.

The ester oil of the present invention is a liquid ester of a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoacid or polyacid with a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoalcohol or polyalcohol, the ester The total number of carbon atoms of is preferably 10 or more, preferably 30 or less.

C ₁ -C ₂₆ The carbon number of the aliphatic monoacid or polyacid is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, or 26. In addition, the carbon number of the C ₁ -C ₂₆ aliphatic monoalcohol or polyalcohol is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, or 26.

Preferably, the ester oil may be a liquid ester of a saturated or unsaturated linear or branched C ₂ -C ₂₀ aliphatic polyacid with a saturated or unsaturated linear or branched C ₂ -C ₂₀ aliphatic monoalcohol. More preferably, the ester oil may be a liquid ester of saturated and linear C ₅ -C ₁₅ aliphatic diacids with saturated and branched C ₂ -C ₅ aliphatic monoalcohols.

The ester oil may also be selected from monoesters, diesters, triesters, tetraesters, and polyesters, and mixtures thereof.

The monoester may have the formula:

R ₁ -C(=O)-OR ₂

R ₁ optionally represents a linear or branched alkyl radical of 1 to 40 carbon atoms, preferably 7 to 19 carbon atoms, optionally comprising at least one ethylenic double bond, R ₂ is optionally optionally substituted linear or branched alkyl of 1 to 40 carbon atoms, preferably 2 to 30 carbon atoms, even more preferably 3 to 10 carbon atoms, comprising at least one ethylenic double bond with represents a radical.

The diester may have the formula:

R ₄ -OC(=O)-R ₃ -C(=O)-OR ₄

R ₃ optionally contains one or more ethylenic double bonds and represents an optionally substituted linear or branched alkylene radical of 1 to 40 carbon atoms, preferably 7 to 19 carbon atoms, R ₄ is each independently, optionally comprising one or more ethylenic double bonds, optionally substituted 1 to 40 carbon atoms, preferably 3 to 30 carbon atoms, even more preferably 3 to 10 carbon atoms Represents a linear or branched alkyl radical.

The expression "optionally substituted" means a group in which R ₁ , R ₂ , R ₃ , and/or R ₄ comprises one or more heteroatoms, for example selected from O, N, and S, for example It is understood to mean that it may have one or more substituents selected from amino, amine, alkoxy, hydroxyl.

Preferably, the total number of carbon atoms in R ₁ +R ₂ or R ₃ +R ₄ may be 9 or more, preferably 12 or more, more preferably 16 or more and most preferably 20 or more.

Among the monoesters of monoacids and monoalcohols, ethyl palmitate, ethylhexyl palmitate, isopropyl palmitate, dicaprylyl carbonate, alkyl myristates such as isopropyl myristate or ethyl myristate, isocetyl stearate, 2 -Ethylhexylisononanoate, isononylisononanoate, isodecylneopentanoate, and isostearylneopentanoate are mentioned.

Esters of C ₄ -C ₂₂ dicarboxylic acids or tricarboxylic acids with C ₁ -C ₂₂ alcohols, and monocarboxylic acids, dicarboxylic acids, or tricarboxylic acids with nonsugars C ₄ -C ₂₆ dihydroxy, tri Esters of hydroxy, tetrahydroxy, or pentahydroxyalcohol may also be used.

diethyl sebacate; isopropyllauroyl sarcosinate; diisopropyl sebacate; bis(2-ethylhexyl)sebacate; diisopropyl adipate; di-n-propyl adipate; dioctyl adipate; bis(2-ethylhexyl)adipate; diisostearyl adipate; bis(2-ethylhexyl)maleate; triisopropyl citrate; triisocetyl citrate; triisostearyl citrate; glyceryl trilactate; glyceryl trioctanoate; trioctyldodecylcitrate; trioleyl citrate; neopentyl glycol diheptanoate; Diethylene glycol diisononanoate is particularly mentioned.

As the ester oil, it is possible to use sugar esters and diesters of C ₆ -C ₃₀ , preferably C ₁₂ -C ₂₂ fatty acids. The term "sugar" is recalled to mean an oxygen-containing hydrocarbon-based compound comprising several alcohol functions, with or without aldehyde or ketone functions, and containing at least 4 carbon atoms. These sugars may be monosaccharides, oligosaccharides, or polysaccharides.

Examples of suitable sugars that may be mentioned include sucrose (or saccharose), glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose, and lactose, and their derivatives, especially methyl derivatives. alkyl derivatives such as methylglucose.

The sugar esters of fatty acids may in particular be selected from the group comprising esters or mixtures of the aforementioned sugars with linear or branched saturated or unsaturated C ₆ -C ₃₀ , preferably C ₁₂ -C ₂₂ fatty acids. . When they are unsaturated, these compounds may have one to three conjugated or non-conjugated carbon-carbon double bonds.

Monooleate or dioleate, stearate, behenate, oleopalmitate, linoleate, linolinate, and oleostearate of sucrose, glucose, or methylglucose may be used.

A worthy example is methylglucosediolate, the product sold under the name Glucate ^® DO by the company Amerchol.

Esters include, for example, oleates, laurates, palmitates, myristates, behenates, cocoates, stearates, linoleates, linolinates, caprates, and arachidonates, or mixtures thereof, such as Examples may be, inter alia, mixed esters of oleopalmitate, oleostearate, and palmitostearate, and pentaerythrityltetraethylhexanoate.

Examples of preferred ester oils include, for example, diisopropyl sebacate, diethyl sebacate, and diisopropyl adipate, dioctyl adipate, 2-ethylhexylhexanoate, ethyl laurate, cetyloctanoate, Octyldodecyloctanoate, isodecylneopentanoate, myristylpropionate, 2-ethylhexyl2-ethylhexanoate, 2-ethylhexyloctanoate, 2-ethylhexylcaprylate/caprate, Methyl palmitate, ethyl palmitate, isopropyl palmitate, dicaprylyl carbonate, isopropyl lauroyl sarcosinate, isononyl isononanoate, ethylhexyl palmitate, isohexyl laurate, hexyl laurate, isocetyl Stearate, isopropyl isostearate, isopropyl myristate, isodecyl oleate, glyceryl tri (2-ethyl hexanoate), pentaerythrityl tetra (2-ethyl hexanoate), 2-ethylhexyl succinate nates, and mixtures thereof.

The most preferred ester oil may be diisopropyl sebacate.

The ester oil may be present in an amount of 0.05% by weight or more, preferably 0.1% by weight or more, more preferably 1% by weight or more, 15% by weight or less, preferably 10% by weight or less, based on the total weight of the composition; More preferably, it may be present in an amount of up to 5% by weight.

[Composition]

The composition according to the invention is in the form of a W/O emulsion.

The term "W/O emulsion" or "water-in-oil emulsion" means any composition that is macroscopically homogeneous, comprising a continuous fatty or oily phase and an aqueous or aqueous phase in the form of droplets dispersed within said fatty or oily phase. do.

In one embodiment, the composition in the form of a W/O emulsion of the present invention may be prepared by the following protocol: (1) mixing an oily component comprising a spherical hydrophobic silica airgel and an ester oil to prepare an oily phase , (2) preparing an aqueous phase, and (3) adding or injecting an aqueous phase to the oil phase while stirring the oil phase.

I. Paid

The composition of the present invention may comprise, in addition to the ester oil, one or more additional oils.

In the present invention, the term "oil" means a fatty substance which is in liquid form at room temperature and atmospheric pressure.

Oily phases suitable for the preparation of the compositions according to the invention may include oils of vegetable or animal origin, synthetic oils, hydrocarbon oils, fatty alcohols, and silicone oils, and mixtures thereof.

Examples of vegetable oils include, for example, hydrocarbon-based oils of vegetable origin, such as phytostearyl esters such as phytostearyl oleate, phytostearyl isostearate and lauroyl/octyldodecyl/phyto. Triglycerides formed from stearyl glutamate (Ajinomoto, Eldew PS203), fatty acid esters of glycerol, in particular those in which the fatty acids may have a chain length ranging from C ₄ to C ₃₆ , especially C ₁₈ to C ₃₆ , these oils can be linear or branched, and saturated or unsaturated; These oils are inter alia heptanoic or octanoic triglycerides, shea oil, alfalfa oil, poppy oil, winter squash oil, millet oil, barley oil, quinoa oil, rye oil, candle nut oil, passionflower oil, shea butter, aloe vera oil, Persimmon oil, peach seed oil, peanut oil, argan oil, avocado oil, baobab oil, borage oil, broccoli oil, marigold oil, camelina oil, canola oil, carrot oil, safflower oil, linseed oil, rapeseed oil, cottonseed oil, coconut oil (palm oil), pumpkin seed oil, malt oil, jojoba oil, lily oil, macadamia oil, corn oil, meadowfoam oil, red pepper oil, monoi oil, hazelnut oil, hazelnut oil, walnut oil, olive oil, evening primrose oil ), palm oil, blackcurrant pip oil, kiwi seed oil, grape seed oil, pistachio oil, winter pumpkin oil, pumpkin oil, quinoa oil, musk rose oil, sesame oil, soybean oil, sunflower oil, castor oil, and watermelon oil, and mixtures thereof , or alternatively caprylic/capric triglycerides, such as those sold by the company ^{Stearineries Dubois or sold under the names Miglyol 810 , 812 , and 818 ® by the} company Dynamit Nobel. Also included are modified vegetable oils, such as activated coconut oil, such as those sold under the name Scalpro or Acnaed by the company Biotropics.

Examples of animal oils include, for example, squalene and squalane.

Examples of synthetic oils include alkane oils such as isododecane and isohexadecane, ester oils, ether oils, and artificial triglycerides.

As examples of artificial triglycerides, for example, caprylcaprylyl glyceride, glyceryl trimyristate, glyceryl tripalmitate, glyceryl trilinolinate, glyceryl trilaurate, glyceryl tricaprate, glyceryl tri caprylate, glyceryl tri(caprate/caprylate), and glyceryl tri(caprate/caprylate/linolinate).

The hydrocarbon oil may be selected from:

- linear or branched, optionally cyclic C ₆ -C ₁₆ lower alkanes. Illustrative examples include hexane, undecane, dodecane, tridecane, and isoparaffins such as isohexadecane, isododecane, and isodecane; and

- linear or branched hydrocarbons comprising more than 16 carbon atoms, such as liquid paraffin, liquid petroleum jelly, polydecene, and hydrogenated polyisobutenes, such as Parleam ^® , and squalane.

Preferred examples of hydrocarbon oils include, for example, linear or branched hydrocarbons such as isohexadecane, isododecane, squalane, mineral oil (eg liquid paraffin), paraffin, petrolatum or petrolatum, naphthalene and the like; hydrogenated polyisobutene, isoeicosan, and decene/butene copolymers; and mixtures thereof.

The term "fat" in fatty alcohols means the inclusion of a relatively large number of carbon atoms. Accordingly, alcohols having 4 or more, preferably 6 or more, and more preferably 12 or more carbon atoms are included in the scope of fatty alcohols. Fatty alcohols may be saturated or unsaturated. Fatty alcohols may be linear or branched.

Fatty alcohols have the R—OH structure, wherein R is saturated and unsaturated, linear and containing from 4 to 40 carbon atoms, preferably from 6 to 30 carbon atoms, more preferably from 12 to 20 carbon atoms. branched radicals). In one or more embodiments, R can be selected from C ₁₂ -C ₂₀ alkyl and C ₁₂ -C ₂₀ alkenyl groups. R may be substituted with one or more hydroxyl groups or may be unsubstituted.

Examples of fatty alcohols include lauryl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, undecylenyl alcohol, myristyl alcohol, octyldodecanol, hexyldecanol, oleyl alcohol, linoleyl alcohol, palmitoleyl alcohol, arachidonyl alcohol, erucyl alcohol, and mixtures thereof.

Thus, fatty alcohols are linear or branched, saturated or unsaturated C ₆ -C ₃₀ alcohols, preferably linear or branched, saturated C ₆ -C ₃₀ alcohols, more preferably linear or branched, saturated C ₁₂ - C ₂₀ alcohols.

Here, the term "saturated fatty alcohol" means an alcohol having a long aliphatic saturated carbon chain. The saturated fatty alcohol is preferably selected from either linear or branched saturated C ₆ -C ₃₀ fatty alcohols. Among linear or branched saturated C ₆ -C ₃₀ fatty alcohols, linear or branched saturated C ₁₂ -C ₂₀ fatty alcohols can be preferably used. Any linear or branched saturated C ₁₆ -C ₂₀ fatty alcohol may be used more preferably. Branched C ₁₆ -C ₂₀ fatty alcohols can be used even more preferably.

Examples of saturated fatty alcohols include lauryl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, undecylenyl alcohol, myristyl alcohol, octyldodecanol, hexyldecanol, and mixtures thereof. can be heard In one embodiment, cetyl alcohol, stearyl alcohol, octyldodecanol, hexyldecanol, or a mixture thereof (eg, cetearyl alcohol), and behenyl alcohol may be used as the saturated fatty alcohol.

Examples of the silicone oil include, for example, linear organopolysiloxanes such as dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, methylhydrogenpolysiloxane and the like; cyclic organopolysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane and the like; and mixtures thereof.

The oil other than the ester oil may be present in the composition in an amount of 1% by weight or more, preferably 5% by weight or more, more preferably 10% by weight or more, even more preferably 15% by weight or more, based on the total weight of the composition, , 40% by weight or less, preferably 30% by weight or less, more preferably 20% by weight or less.

II. Awards

The aqueous phase of the composition according to the invention comprises at least one aqueous medium, ie water and optionally an aqueous solvent.

In the present invention, the term "aqueous solvent" means a compound that is liquid at room temperature and is water-miscible (miscible in more than 50% by weight of water at 25° C. and atmospheric pressure).

Water-soluble solvents that may be used in the compositions of the present invention may also be volatile.

Among the water-soluble solvents that can be used in the composition according to the invention, in particular alcohols, for example lower monoalcohols containing 1 to 5 carbon atoms, such as ethanol and isopropanol, glycols containing 2 to 8 carbon atoms, e.g. Examples include ethylene glycol, propylene glycol, 1,3-butylene glycol, and dipropylene glycol, C ₃ and C ₄ ketones, and C ₂ -C ₄ aldehydes.

According to another embodiment variant, the aqueous phase of the composition according to the invention may comprise at least one C ₂ -C ₃₂ polyol.

For the purposes of the present invention, the term “polyol” is to be understood as meaning any organic molecule comprising at least two free hydroxyl groups. Preferably, the polyols according to the invention are present in liquid form at room temperature.

Polyols suitable for use in the present invention are linear, branched, or cyclic, containing in the alkyl chain at least two -OH functions, in particular at least 3 -OH functions, more preferably at least 4 -OH functions. It may be a saturated or unsaturated alkyl-type compound. Polyols which are advantageously suitable for compounding the composition according to the invention are in particular those exhibiting from 2 to 32 carbon atoms, preferably from 3 to 16 carbon atoms. Advantageously, the polyol is, for example, ethylene glycol, pentaerythritol, trimethylolpropane, propylene glycol, 1,3-propanediol, butylene glycol, isoprene glycol, pentylene glycol, hexylene glycol, glycerol (glycerin), polyglycerols such as glycerol oligomers, for example, diglycerol, and polyethylene glycol, and mixtures thereof. According to one particular embodiment, the composition of the present invention may comprise at least glycerol.

The aqueous phase (water and optionally water-miscible solvent) may be present in the composition in an amount of 5% by weight or more, preferably 10% by weight or more, more preferably 25% by weight or more, based on the total weight of the composition, and 50% by weight. % or less, preferably 45 wt% or less, more preferably 35 wt% or less.

[Composite Silica Particles]

The composition according to the invention may comprise one or more composite silica particles.

In the context of the present invention, the term "composite silica particles" means silica particles comprising functional compounds, preferably metal oxides. Accordingly, preferably, the composite silica particles may refer to “metal oxide-containing silica particles”. Most preferably, the metal oxide is dispersed within the silica particles.

The metal oxide may preferably be selected from titanium dioxide, zinc oxide, iron oxide, and zirconium oxide, or mixtures thereof, more preferably from titanium dioxide (TiO ₂ ) and zinc oxide, and mixtures thereof. Particularly preferably, titanium dioxide can be used.

The composite silica particles may have an average particle size determined by image analysis method of 0.1 μm or more, preferably 0.5 μm or more, more preferably 1 μm or more, and 50 μm or less, preferably 20 μm or less, more preferably may have an average particle size of 12 μm or less by image analysis.

"Average particle size" can be determined according to the following method: A particle size of 50 particles is measured using an SEM image, and the average value of the particle size is calculated.

The composite silica particles may be porous or non-porous, and may have a low oil absorption capacity.

In the composite silica particles, the weight ratio of silica to functional compound (preferably metal oxide, most preferably titanium dioxide) is 9:1 to 5:5, preferably 4:1 to 3:2, more preferably It could be 7:3.

The composite silica particles may be surface treated to make them hydrophobic. For example, the composite silica particles may be surface treated with an alkylsilane.

Most preferably, CHIFFONSIL-5T sold by JGC Catalysts and Chemicals can be used as the composite silica particle.

The composite silica particles may be present in an amount of 0.01% by weight or more, preferably 0.5% by weight or more, more preferably 1% by weight or more, based on the total weight of the composition. The composite silica particles may be present in an amount of 10% by weight or less, preferably 7% by weight or less, more preferably 5% by weight or less, based on the total weight of the composition.

[Surfactants]

The composition according to the invention, used alone or as a mixture, may comprise one or more surfactants selected from amphoteric, anionic, cationic or nonionic surfactants.

Examples of the anionic surfactant that can be used in the composition of the present invention include alkyl sulfate, alkyl ether sulfate, alkyl sulfonate, alkyl ether sulfonate, sulfate ester of alkylphenoxypolyoxyethylene ethanol, alpha-olefin sulfonate, beta Alkyloxyalkenesulphonates, alkylarylsulfonates, alkylcarbonates, succinamates, sulfosuccinates, sarcosinates, octocinol or nonoxynol phosphates, taurates, fatty taurides, sulfated monoglycerides, fatty acid aminos polyoxyethylene sulfate, isethionate, alkylbenzenesulfonic acid, polyoxyethylene alkylether sulfuric acid, polyoxyethylene alkylethercarboxylic acid, and polyoxyethylene alkylamideethercarboxylic acid, and salts thereof.

Examples of nonionic surfactants that can be used in the compositions of the present invention include ethylene oxide adducts with polyethoxylated fatty alcohols or polyglycerolated fatty alcohols, such as lauryl alcohol, especially 9 to 50 oxyethylene those containing units (INCI names are laureth-9 to laureth-50), especially laureth-9; For example, esters of fatty acids with polyols having a saturated or unsaturated chain comprising from 8 to 24 carbon atoms, and oxyalkylenated derivatives thereof, i.e. those comprising oxyethylene and/or oxypropylene units, for example For example, esters of glycerol with C ₈ -C ₂₄ fatty acids, and their oxyalkylenated derivatives, in particular polyoxyethylenated glyceryl stearate (mono-, di- and/or tristearate), for example PEG- 30 dipolyhydroxystearate and PEG-20 glyceryl triisostearate; Esters of sugars with C ₈ -C ₂₄ fatty acids and their oxyalkylenated derivatives, for example polyethoxylated sorbitol esters of C ₈ -C ₂₄ fatty acids, in particular polysorbate 80, for example by the company Croda the product marketed under the name "TWEEN 80"; ethers of sugars with C ₈ -C ₂₄ fatty alcohols such as caprylyl/capryl glucoside; polyoxyethylene alkyl ethers; polyoxyethylene oxypropylene alkyl ethers; fatty acid alkanol amides; alkyl amine oxides; alkyl polyglycosides and silicone surfactants, for example polydimethylsiloxanes comprising oxyethylene groups and/or oxypropylene groups, for example PEG-10 dimethicone, bis-PEG/PPG-14/14 dimethicone; bis-PEG/PPG-20/20 dimethicone, and PEG/PPG-20/6 dimethicone.

Examples of amphoteric surfactants that can be used in the compositions of the present invention include alkanoyl amide propyl-N,N-dimethyl glycine betaine, alkanoyl amide propyl-N,N-dimethyl-2-hydroxypropyl sulfobetaine, Alkyl-N,N-dimethyl glycine betaine, alkanoyl amide propyl-N,N-dimethyl-propyl sulfobetaine, lauryl-N,N-dimethyl-2-hydroxypropyl sulfobetaine, and salts thereof may be included.

Examples of cationic surfactants that can be used in the composition of the present invention include C ₈ -C ₂₄ long-chain dialkyl dimethyl ammonium salts, long-chain monoalkyl monobenzyl dimethyl ammonium salts, and long-chain monoalkyl trimethyl ammonium salts, all of which are may have an amide or ester bond therein, and the counterion is preferably a halogen atom, such as chlorine and bromine atoms, sulfate, and sulfate residues containing alkyl groups, such as methyl- and ethyl-sulfuric acid, and salts thereof to be. Cationic surfactants of the amine type are those in the form of long-chain dialkyl monomethyl amine salts having a long-chain C ₈ -C ₂₄ alkyl group which may have amide or ester linkages therein, preferably in the form of hydrochloride, sulfate, or phosphate. , and salts thereof.

The surfactant may be present in the composition in an amount of 0.5% by weight or more, preferably 1% by weight or more, more preferably 1.5% by weight or more, and 15% by weight or less, preferably 10% by weight, based on the total weight of the composition Hereinafter, more preferably, it may be present in the composition in an amount of 5% by weight or less.

[UV filter]

The composition according to the invention may comprise one or more UV filters.

The UV filter may be solid or liquid, preferably liquid. The terms “solid” and “liquid” mean solid and liquid at 25° C. under 1 atm, respectively. The UV filter may be made from one or more organic or inorganic materials, preferably from one or more organic materials. Accordingly, the UV filter is preferably an organic UV filter.

Organic UV filters include anthranilic acid derivatives; dibenzoylmethane derivatives; cinnamic acid derivatives; salicylic acid derivatives such as homosalate (homomentyl salicylate) and ethylhexyl salicylate; camphor derivatives; benzophenone derivatives; β,β-diphenylacrylate derivatives; triazine derivatives; benzotriazole derivatives; benzalmalonate derivatives; benzimidazole derivatives; imidazoline derivatives; bis-benzoazolyl derivatives; p-aminobenzoic acid (PABA) and its derivatives; benzoxazole derivatives; screening polymers and screening silicones; dimers derived from α-alkylstyrene; 4,4-diarylbutadiene; Octocrylene and its derivatives, guaiazulene and its derivatives, rutin and its derivatives, flavonoids, biflavonoids, oryzanol and its derivatives, quinic acid and its derivatives, phenol, retinol, cysteine, aromatic amino acids, peptides with aromatic amino acid residues , and mixtures thereof.

The UV filter may be present in the composition in an amount of 1 wt% or more, preferably 3 wt% or more, more preferably 5 wt% or more, based on the total weight of the composition, and 15 wt% or less, preferably 10 wt% Hereinafter, more preferably, it may be present in the composition in an amount of 8% by weight or less.

[Color or Pigment]

The composition according to the present invention may contain one or more colorants or pigments to impart a desired color or effect.

Examples of colorants or pigments may include inorganic pigments, organic pigments, and/or lakes.

As examples of inorganic pigments, metal oxides and metal hydroxides such as magnesium oxide, magnesium hydroxide, calcium oxide, calcium hydroxide, aluminum oxide, aluminum hydroxide, iron oxide (α-Fe ₂ O ₃ , γ-Fe ₂ O ₃ , Fe ₃ O ₄ , FeO), red iron oxide, iron sulfate, black iron oxide, iron hydroxide, titanium dioxide, lower titanium oxide, zirconium oxide, chromium oxide, chromium hydroxide, manganese oxide, cobalt oxide, cerium oxide, nickel oxide, and zinc oxide, and complex oxides and complex hydroxides such as iron titanate, cobalt titanate, and cobalt aluminate. Suitable inorganic pigments include non-metal oxides such as alumina and silica, ultramarine blue (ie sodium aluminum silicate with sulfur), Prussian blue, manganese violet, bismuth oxychloride, talc, mica, sericite, magnesium carbonate, calcium carbonate , magnesium silicate, aluminum magnesium silicate, silica, titanated mica, iron oxide titanated mica, bismuth oxychloride, and the like.

As examples of organic pigments, carbon black, carmine, phthalocyanine blue and green pigments, diarylide yellow and orange pigments, and azo type red and yellow pigments such as toluidine red, lysso red, naphthol red and brown pigments, and Combinations of these can be mentioned.

"Lake" generally refers to a colorant prepared from a water-soluble organic dye (eg, D&C or FD&C) deposited on an insoluble reactive or adsorbent substrate or diluent. As used herein, the term "D&C" refers to drugs and cosmetic colorants approved for use in drugs and cosmetics by the FDA. As used herein, the term “FD&C” refers to food, drug, and cosmetic colorants approved for use in food, drugs, and cosmetics by the FDA. Substrates suitable for the formation of lakes include, but are not limited to, mica, bismuth oxychloride, sericite, alumina, aluminum, copper, bronze, silver, calcium, zirconium, barium, and strontium, titanated mica, fumed silica, spherical silica. , polymethylmethacrylate (PMMA), finely powdered Teflon, boron nitride, acrylate copolymer, aluminum silicate, aluminum stark octenylsuccinate, bentonite, calcium silicate, cellulose, chalk, corn stark, diatomaceous earth, topsoil, Glyceryl Stark, Hectorite, Hydrated Silica, Kaolin, Magnesium Aluminum Silicate, Magnesium Trisilicate, Maltodextrin, Montmorillonite, Microcrystalline Cellulose, Rice Starch, Silica, Talc, Mica, Titanium Dioxide, Zinc Laurate, Myristic Acid Zinc, zinc rosinate, alumina, attapulgite, calcium carbonate, calcium silicate, dextran, nylon, silica silicate, silk powder, sericite, soy flour, tin oxide, titanium hydroxide, trimagnesium phosphate, walnut shell powder, and mixtures thereof.

A colorant or pigment may be surface treated, for example, to make it more hydrophobic or more dispersible in a vehicle. The surface treatment compound may be, for example, alkyl, aryl, allyl, vinyl, alkyl-aryl, aryl-alkyl, organosilicon, diorganosilicon, dimethicone, methicone, polyurethane, silicone-polyurethane, and their fluoro hydrophobic moieties selected from rho- or perfluoro-derivatives. Other hydrophobicity modifiers include lauroyl lysine, isopropyl titanium triisostearate (ITT), ITT and dimethicone (ITT/dimethicone) crosspolymers, ITT and amino acids, ITT/triethoxycaprylylsilane crosspolymers, Wax (eg carnauba), fatty acid (eg stearate), HDI/trimethylol hexyllactone crosspolymer, PEG-8 methyl ether triethoxysilane, aloe, jojoba ester, lecithin, perfluoroalcohol phosphate, and magnesium myristic acid (MM).

Interference or pearl pigments may be included in the composition according to the invention. Interference or pearl pigments can typically be formed of mica laminated with a film of about 50 to 300 nm TiO ₂ , Fe ₂ O ₃ , or Cr ₂ O ₃ . Interference or pearl pigments include white pearlescent materials such as mica coated with titanium oxide or coated with bismuth oxychloride; colored pearlescent materials such as titanium mica with iron oxide, titanium mica with ferric blue or chromium oxide, titanium mica with organic pigments of the type described above.

Preferably, the composition according to the invention comprises "titanium dioxide (and) alumina (and) isopropyl titanium triisostearate", "iron oxide (and) isopropyl titanium triisostearate", and/or "titanium dioxide ( and) aluminum hydroxide (and) dimethicone (and) hydrogen dimethicone.

The colorant or pigment may be present in the composition in an amount of 1% by weight or more, preferably 5% by weight or more, more preferably 10% by weight or more, and 25% by weight or less, preferably 20% by weight, based on the total weight of the composition. %, more preferably up to 15% by weight, may be present in the composition.

[additive]

The composition according to the present invention includes, for example, fillers such as magnesium sulfate, dyes, resins, dispersants, antioxidants, preservatives such as phenoxyethanol, fragrances, neutralizers, pH adjusters, disinfectants, and Any other optional additives may also be included, selected from other cosmetically active ingredients, for example vitamins, moisturizers, emollients or collagen protectants, and mixtures thereof.

In particular, the composition according to the invention may comprise a film-forming agent such as a film-forming silicone resin, for example trimethylsiloxysilicate. In addition, the composition according to the present invention may contain a thickening agent such as a hydrophilic thickener, for example, hectorite modified with C ₁₀ to C ₂₂ fatty acid ammonium chloride, in particular hectorite modified with distearyldimethylammonium chloride (disteardimonium hectorite). light) may be included.

Furthermore, in addition to the spherical hydrophobic silica airgel, the composition according to the invention may comprise additional oil-absorbing particles. As examples of oil-absorbing particles, cellulose, silica, silicate, perlite, boron nitride, magnesium carbonate, magnesium hydroxide, hydrophobic silica such as silica silicate, kaolin, talc, polyamide (especially nylon-6) powder , acrylic polymer powder, especially polymethyl methacrylate powder, polymethyl methacrylate/ethylene glycol dimethacrylate powder, polyallyl methacrylate/ethylene glycol dimethacrylate powder, or ethylene glycol dimethacrylate/la uril methacrylate copolymer powder, silicone, and mixtures thereof.

These additives and their concentrates should not modify the desired properties in the compositions of the present invention.

[Method and use]

The composition according to the invention is intended for use as a cosmetic composition. Accordingly, the cosmetic composition according to the present invention may be intended for application to keratin materials, for example skin, scalp, hair, mucous membranes, for example lips, and nails, in particular skin, for example skin of the face.

The composition according to the present invention can be used as a skin cosmetic composition, preferably a skin makeup composition, more preferably a foundation.

The composition according to the invention is a cosmetic method for makeup of keratin materials, for example the skin, scalp, hair, mucous membranes, for example lips, and nails, in particular the skin, for example the skin of the face, the composition according to the invention It can be used in a cosmetic method comprising the step of applying to a keratin material.

The present invention also relates to the use of at least one ester oil in a cosmetic composition in the form of a W/O emulsion comprising at least one spherical hydrophobic silica airgel for stabilizing the composition.

Another aspect of the present invention is an ester oil used to increase the stability of a cosmetic composition in the form of a W/O emulsion comprising at least one spherical hydrophobic silica airgel.

Example

The present invention will be described in more detail by way of Examples. However, these examples should not be construed as limiting the scope of the present invention.

Examples 1 to 4 and Comparative Example 1

Method for preparing foundation compositions of the present invention and comparative examples

The ingredients of phase (A1) listed in Table 1 were thoroughly mixed at 45°C. The components of phase (A2) were added to phase (A1) and completely dissolved. The ingredients of phase (A3) were added and mixed using a Moritz homogenizer at 45° C. for 5 minutes at 3,500 rpm. The ingredients of phases (B), (C1), and (C2) were added and mixed at 3,500 rpm for 10 minutes. The mixture of ingredients of phase (D) was added and mixed at 45° C. at 3,500 rpm for 10 minutes. As a result, the obtained foundation composition was cooled to 25 degreeC. Finally, the components of phase (E) were added and mixed at 3,000 rpm for 5 minutes to obtain a W/O emulsion type foundation composition.

The spherical silica silylate airgel of phase (C2) had an average primary particle size of 10 μm, an average roundness of 0.88, a BET specific surface area of 592 m 2 /g, a pore volume of 4.0 ml/g determined by the BJH method, JIS- It had an oil absorption capacity of 6.8 ml/g as measured by K6217-4, and a peak pore radius of 20 nm determined by the BJH method.

In Table 1, all ingredients are based on "wt%" as active raw materials.

evaluation

[stability]

The W/O emulsion type foundation composition of each of the present invention and comparative example was placed at 45°C. Stability was evaluated from changes in appearance, especially separation of aqueous and oil phases. The criteria are as follows: "Very good" means that the emulsion was stable for 2 months, "Good" means that the emulsion was stable for 1 month, but the oily phase separated slightly after 2 months, "Normal" means that the emulsion was stable for 1 month Although the emulsion was stable for 1 week, the oil phase means that it separated slightly after 1 month, and "poor" means the aqueous and oil phase separated after 1 day.

[Flexibility of the film]

The W / O emulsion type foundation composition of each of the present invention and comparative example was homogeneously applied on artificial skin (artificial leather sold by Idemitsu Techno Fine Ltd., model name: SUPPLALE®) at a rate of 1.5 mg/cm 2 . The skin was left for 30 minutes, and a film derived from the foundation composition was formed on the artificial skin. The skin was forcibly contracted and enlarged by hand for 10 seconds. This "shrink and expand" process was performed three times for 10 seconds and evaluated by observing whether cracks occurred. The criteria are as follows: "Very good" means no cracks, "Good" means some thin cracks, and "Poor" means many cracks.

A result is shown in Table 1.

As shown in Table 1 above, only the combination of the spherical hydrophobic silica airgel and ester oil of the present invention had high stability as well as high flexibility. On the other hand, when no ester oil was used, the stability was very low, and many cracks occurred. Therefore, it has been demonstrated that the ester oil of the present invention can improve the stability of a composition comprising a large amount of spherical hydrophobic silica airgel.

Claims (14)

At least one spherical hydrophobic silica airgel, and a liquid ester of a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoacid or polyacid with a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoalcohol or polyalcohol A cosmetic composition in the form of a W / O emulsion, comprising at least one ester oil selected from The method of claim 1,
The spherical hydrophobic silica airgel is a spherical hydrophobic airgel of silica silylate, cosmetic composition. 3. The method according to claim 1 or 2,
The spherical hydrophobic silica airgel is 0.8 or more, preferably 0.82 or more, and less than 1, preferably 0.99 or less, more preferably 0.98 or less, even more preferably 0.97 or less, even more preferably 0.96 or less, especially Preferably, the cosmetic composition has an average roundness determined by an image analysis method of 0.95 or less. 4. The method according to any one of claims 1 to 3,
The spherical hydrophobic silica airgel is 2 ml/g or more, preferably 3 ml/g or more, more preferably 4 ml/g, most preferably 5 ml/g or more, and 12 ml/g or less, preferably 11 ml/g or less, more preferably 10 ml/g or less, and most preferably 8 ml/g or less, having an oil absorption capacity measured at a wet point, a cosmetic composition. 5. The method according to any one of claims 1 to 4,
The spherical hydrophobic silica gel is 200 m 2 /g or more, preferably 400 m 2 /g or more, more preferably 500 m 2 /g or more, 1,200 m 2 /g or less, preferably 1,000 m 2 /g or less, more preferably has a specific surface area determined by the BET method of 800 m 2 /g or less, a cosmetic composition. 6. The method according to any one of claims 1 to 5,
The spherical hydrophobic silica gel is 1 ml/g or more, preferably 2 ml/g or more, more preferably 3 ml/g or more, 10 ml/g or less, preferably 8 ml/g or less, more preferably has a pore volume determined by the BJH method of 7 ml/g or less, a cosmetic composition. 7. The method according to any one of claims 1 to 6,
The spherical hydrophobic silica gel is 5 nm or more, preferably 10 nm or more, more preferably 12 nm or more, 50 nm or less, preferably 30 nm or less, more preferably 25 nm or less, by the BJH method. A cosmetic composition having a determined peak pore radius. 8. The method according to any one of claims 1 to 7,
The spherical hydrophobic silica gel has an average particle size of 0.5 μm or more, preferably 1 μm or more, more preferably 2 μm or more, and 30 μm or less, preferably 20 μm or less, more preferably 15 μm or less. , cosmetic composition. 9. The method according to any one of claims 1 to 8,
The spherical hydrophobic silica airgel is 0.05 wt% or more, preferably 0.1 wt% or more, more preferably 0.3 wt% or more, most preferably 0.5 wt% or more, and 15 wt% or less, based on the total weight of the composition , preferably present in an amount of 10 wt% or less, more preferably 5 wt% or less, and most preferably 2 wt% or less. 10. The method according to any one of claims 1 to 9,
The ester oil is a liquid ester of saturated and linear C ₅ -C ₁₅ aliphatic diacid with saturated and branched C ₂ -C ₅ aliphatic monoalcohol, preferably diisopropyl sebacate. 11. The method according to any one of claims 1 to 10,
The ester oil is 0.05% by weight or more, preferably 0.1% by weight or more, more preferably 1% by weight or more, 15% by weight or less, preferably 10% by weight or less, more preferably, based on the total weight of the composition. preferably present in an amount of 5% by weight or less. 12. The method according to any one of claims 1 to 11,
The cosmetic composition is a skin makeup composition, preferably a foundation. A method for preparing a cosmetic composition in the form of a W / O emulsion comprising:
- preparing an oil phase by mixing an oily component comprising at least one spherical hydrophobic silica airgel and at least one ester oil, wherein the at least one ester oil is a saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic selected from liquid esters of monoacids or polyacids with saturated or unsaturated linear or branched C ₁ -C ₂₆ aliphatic monoalcohols or polyalcohols;
- preparing an aqueous phase; and
- adding or injecting the aqueous phase to the oil phase while stirring the oil phase. 13. A cosmetic method for a keratinous material, for example the skin, comprising the step of applying the cosmetic composition of any one of claims 1 to 12 to the keratinous material.