JP2021070644A - High internal aqueous phase emulsion - Google Patents

Abstract

To provide a stable composition in a form of a W/O emulsion comprising a large amount of water.SOLUTION: The present invention relates to a composition in a form of a W/O emulsion, comprising: (a) at least one kind of oil, (b) at least one kind of emulsifier, and (c) water, where a melting point of a mixture of the (a) oil and the (b) emulsifier is between 5°C and 50°C, and an amount of the (c) water in the composition is 50 mass% or more, preferably 60 mass% or more, and further preferably 70 mass% or more, relative to a total mass of the composition. The composition in the form of a W/O emulsion according to the present invention is stable so that the composition can maintain the W/O structure thereof for a long period of time.SELECTED DRAWING: None

Description

The present invention relates to compositions in the form of W / O emulsions containing large amounts of water.

The use of W / O emulsions is a known practice in the field of cosmetics or dermatology. These emulsions, which consist of an aqueous phase dispersed in the oil phase, have an outer oil phase, so W / O emulsion-based cosmetic / dermatological products can provide a comfortable feel.

A W / O emulsion containing a relatively large amount of water is called a high internal phase W / O emulsion. In general, a high internal phase W / O emulsion can provide a fresher sensation due to a relatively large amount of water, in addition to the good water resistance or sweat resistance due to the outer oil phase of the emulsion.

However, it is difficult to prepare a stable high internal aqueous phase emulsion.

U.S. Pat. No. 2,528,378 U.S. Pat. No. 2,781,354 U.S. Pat. No. 4,874,554 U.S. Pat. No. 4,137,180 US-A-5364633 US-A-5411744

Walter Noll, "Chemistry and Technology of Silicones" (1968) Academic Press Cosmetics and Toiletries, Vol. 91, January 1976, pp. 27-32, Todd & Byers "Volatile Silicone Fluids for Cosmetics" "Hansen Solubility Parameters: A User's Handbook", by Charles M. Hansen, CRC Press (2007) "Solubility parameter values", by Eric A. Gruike, "Polymer Handbook", 3rd edition, Chapter VII, pp. 519-559 CTFA International Cosmetic Ingredient Dictionary & Handbook, 15th Edition, 2014 "Handbook of Surfactants", M.R.Porter, Blackie & Son Publishing (Glasgow and London), 1991, pp. 116-178

Therefore, it is an object of the present invention to provide a stable composition in the form of a W / O emulsion containing a large amount of water.

The above object of the present invention is
(a) At least one oil and
(b) At least one emulsifier and
(c) Including water
The melting point of the mixture of (a) oil and (b) emulsifier is between 5 ° C and 50 ° C.
In the form of a W / O emulsion, the amount of (c) water in the composition is 50% by mass or more, preferably 60% by mass or more, more preferably 70% by mass or more, based on the total mass of the composition. It can be achieved by the composition.

The composition according to the present invention may contain a continuous phase and a dispersed phase, the continuous phase may contain (a) oil and (b) emulsifier, and the dispersed phase may contain (c) water.

(a) The Hansen solubility parameter of the oil may be ^{13.5 to 18 MPa 0.5} , preferably 14.0 to 17.5 MPa ^0.5 , and more preferably 14.5 to 17 MPa ^0.5.

(a) The oil may be selected from the group consisting of hydrocarbon oils, vegetable oils, and mixtures thereof.

(a) The oil may be selected from the group consisting of dodecane, hemi squalene, squalane, coconut oil, and mixtures thereof.

The amount of (a) oil in the composition according to the present invention is 1% by mass to 25% by mass, preferably 3% by mass to 20% by mass, and more preferably 5% by mass to 15% by mass with respect to the total mass of the composition. It may be% by mass.

(b) The HLB value of the emulsifier may be greater than 1.7 and less than 7, preferably greater than 2.0 and less than 6.5, and more preferably greater than 3.0 and less than 6.0.

(b) The emulsifier can be selected from the group consisting of anionic, cationic, amphoteric, nonionic surfactants and mixtures thereof.

(b) The emulsifier can be selected from the group consisting of lecithin, glycol distearate, sorbitan sesquioleate, sorbitan trioleate, steares-2, coconut oil fatty acid PEG-7 glyceryl, and mixtures thereof.

The composition according to the present invention may contain (b) first and second emulsifiers as emulsifiers, wherein the first emulsifier has a melting point of less than 5 ° C and the second emulsifier is 30 ° C. It has a super melting point.

The amount of (b) emulsifier in the composition according to the present invention is 1% by mass to 25% by mass, preferably 3% by mass to 20% by mass, and more preferably 5% by mass to 15% by mass, based on the total mass of the composition. It may be% by mass.

The composition according to the invention may further comprise at least one alcohol.

The composition according to the present invention may contain a thickener of 1% by mass or less, preferably 0.1% by mass or less, and more preferably does not contain a thickener.

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

The present invention also relates to a cosmetological method, preferably a moisturizing or hydrating method, for a keratinous substance such as skin, comprising the step of applying the composition according to the invention to the keratinous substance.

As a result of diligent studies, the present inventors have discovered that it is possible to provide a stable composition in the form of a W / O emulsion containing a large amount of water. Therefore, the composition in the form of a W / O emulsion according to the present invention is:
(a) At least one oil and
(b) At least one emulsifier and
(c) Including water
The melting point of the mixture of (a) oil and (b) emulsifier is between 5 ° C and 50 ° C.
The amount of (c) water in the composition is 50% by mass or more, preferably 60% by mass or more, and more preferably 70% by mass or more, based on the total mass of the composition.

The composition in the form of a W / O emulsion according to the present invention is stable and can maintain its W / O structure for a long time. This can be visually confirmed by a uniform or uniform appearance without visible phase separation.

The composition according to the present invention contains an oil phase and an aqueous phase dispersed in the oil phase. The emulsifier can be present at the interface between the oil phase and the aqueous phase. The emulsifier can form a protective layer around the aqueous phase and can stabilize the dispersion of the aqueous phase in the oil phase.

In compositions containing large amounts of water, the thickness of the protective layer around the aqueous phase in the oil phase tends to be thin or may not be very rigid, thus stabilizing the dispersion of the aqueous phase in the oil phase. It is generally difficult to do. However, in the present invention, the rigidity of the protective layer can be controlled so that it is neither too hard nor too soft, and therefore the protective layer is not fragile. Accordingly, the aqueous phase in the composition according to the present invention can be sufficiently protected, and the dispersion of the aqueous phase in the oil phase can be maintained. On the other hand, when the composition according to the present invention is applied to a keratin substance, the protective layer can be rapidly destroyed by a shearing force that can be applied by a finger or the like. Therefore, the aqueous phase may be spread over the keratinous material to release water, which can provide a fresh feel.

The viscosity of the composition according to the invention can be controlled without a thickener. The viscosity of the composition according to the invention can be controlled by the internal phase structure such as droplet size and mass percent of aqueous phase.

Furthermore, the composition according to the present invention can increase the amount of the water-soluble cosmetological active ingredient in the internal aqueous phase, and thus can bring about an excellent cosmetological effect. Moreover, the composition in the form of a W / O emulsion according to the invention can provide unique texture properties. Upon application, the user can perceive the softness and smoothness of the composition (these feels can be obtained primarily from the oil phase). The emulsion can become hard if the user applies a greater shear force in an attempt to fully apply it to the keratinous material. The emulsion can then break and water can be released from the aqueous phase.

If the oil (a) in the composition according to the invention ^{has a Hansen solubility parameter of 13.5 to 18 MPa 0.5} , preferably 14.0 to 17.5 MPa ^0.5 , more preferably 14.5 to 17 MPa ^0.5 , the stability of the composition according to the invention is It can be further improved.

(b) If the emulsifier has an HLB value greater than 1.7 and less than 7, preferably greater than 2.0 and less than 6.5, more preferably greater than 3.0 and less than 6.0, the stability of the composition according to the invention can be further improved.

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

[Composition]
The composition according to the present invention may contain a continuous phase and a dispersed phase, the continuous phase may contain (a) oil and (b) emulsifier, and the dispersed phase may contain (c) water.

(a) Oil and (b) emulsifier are different substances from each other.

The melting point of the mixture of (a) oil and (b) emulsifier is between 5 ° C and 50 ° C, preferably between 10 ° C and 50 ° C, more preferably between 15 ° C and 50 ° C.

The (a) oil and (b) emulsifier can be mixed at a temperature higher than the maximum melting temperature of the mixture of oil and surfactant. (A) Oil and (b) emulsifier may be mixed using any conventional method and means. The mixture of (a) oil and (b) emulsifier should be uniform or uniform.

The melting point of a mixture of (a) oil and (b) emulsifier can be determined, for example, by DSC (Differential Scan Calorimetry) analysis, which is common in the art.

If the mixture is not in the form of a liquid (eg, paste) at the starting temperature, the mixture may be heated. The temperature read at the peak of the melting curve (during heating) can be considered as the melting point of the mixture.

If the mixture is in liquid form at the starting temperature, the mixture may be cooled. The temperature read at the first freezing point (during cooling) can be considered as the melting point of the mixture.

(oil)
The composition according to the invention (a) comprises at least one oil. When two or more oils (a) are used, they may be the same or different.

As used herein, the term "oil" means an aliphatic compound or substance in the form of a liquid or paste (non-solid) at atmospheric pressure (1 atm) and room temperature (25 ° C.). Oils commonly used in cosmetics can be used alone or in combination. These oils may be volatile or non-volatile.

The oil may be a non-polar oil such as a hydrocarbon oil or a silicone oil, a polar oil such as a vegetable oil and an ester oil or an ether oil, or a mixture thereof.

The oil may be selected from the group consisting of plant-derived oils, synthetic oils, silicone oils, hydrocarbon oils, and fatty alcohols.

Examples of vegetable oils are, for example, palm oil, flaxseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, southern ka oil, sunflower oil, saflower oil, jojoba oil, sunflower oil, almond oil, rapeseed oil. , Sesame oil, soybean oil, peanut oil, and mixtures thereof.

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

Ester oils are preferably saturated or unsaturated, and linear or branched C ₁ -C ₂₆ aliphatic monoacid or polyacid, saturated or unsaturated, linear or branched C _{1 to} C ₂₆ Liquid esters with aliphatic monohydric alcohols or polyhydric alcohols, and the total number of carbon atoms of these esters is 10 or more.

Preferably, in the case of an ester of a monohydric alcohol, at least one of the alcohols and acids from which the ester of the invention is derived is branched.

Among the monoesters of monoacids and monohydric alcohols, ethyl palmitate, ethylhexyl palmitate, isopropyl palmitate, dicaprylyl carbonate, alkyl myristate, such as isopropyl myristate or ethyl myristate, isosetyl stearate, 2-ethylhexyl isononanoate, Isononyl isononanoate, isodecyl neopentate and isostearyl neopentate can be mentioned.

C _{4 to} C ₂₂ dicarboxylic acid or tricarboxylic acid and _{ester of C 1 to} C ₂₂ alcohol, and monocarboxylic acid, dicarboxylic acid or tricarboxylic acid and non-sugar C _{4 to} C ₂₆ dihydroxy, trihydroxy, tetrahydroxy or pentahydroxy Esters with alcohol may also be used.

Diethyl sebacate, isopropyl lauroyl sarcosate, diisopropyl sebacate, bis sebacate (2-ethylhexyl), diisopropyl adipate, di-n-propyl adipate, dioctyl adipate, bis adipate (2-ethylhexyl), di-adipate Isostearyl, bis maleate (2-ethylhexyl), triisopropyl citrate, triisocetyl citrate, triisostearyl citrate, glyceryl trilactic acid, glyceryl trioctanoate, trioctyldodecyl citrate, trioleyl citrate, neopentyl diheptate Glycol and diethylene glycol diisononanoate can be particularly mentioned.

As the ester oil, _{sugar esters and diesters of C 6 to} C ₃₀ , preferably C _{12 to} C ₂₂ fatty acids can be used. The term "sugar" can mean an oxygen-containing hydrocarbon compound that contains several alcohol functional groups, has or does not have an aldehyde or ketone functional group, and contains at least 4 carbon atoms. Recall. These sugars can be monosaccharides, oligosaccharides or polysaccharides.

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

Fatty acid sugar esters are particularly selected from the group comprising esters or esters of the aforementioned sugars with linear or branched saturated or unsaturated C _{6 to} C ₃₀ , preferably C _{12 to} C _{22 fatty acids.} can do. These compounds, when unsaturated, can have 1 to 3 conjugated or unconjugated carbon-carbon double bonds.

Esters in this modified form can also be selected from monoesters, diesters, triesters, tetraesters and polyesters, and mixtures thereof.

These esters include, for example, oleic acid ester, lauric acid ester, palmitic acid ester, myristic acid ester, behenic acid ester, coconut oil fatty acid ester, stearic acid ester, linoleic acid ester, linolenic acid ester, capric acid ester, and arachidone. It may be an acid ester, or a mixture thereof, for example a mixed ester of oleopalmitic acid, oleostearic acid, and palmitostearic acid, and pentaerythrityl tetraethylhexanoate.

More specifically, monoesters and diesters, especially monooleic acid or dioleic acid esters of sucrose, glucose, or methyl glucose, stearic acid esters, bechenic acid esters, oleopalmitic acid esters, linoleic acid esters, linolenic acid esters, and Oleostearate ester is used.

An example that can be mentioned is a product sold by Amerchol under the name Glucate® DO, which is methyl glucose dioleate.

Examples of preferred ester oils include, for example, diisopropyl adipate, dioctyl adipate, 2-ethylhexyl hexanate, ethyl laurate, cetyl octanate, octyldodecyl octanate, octyldodecyl myristate, isodecyl neopentate, myristyl propionate, 2 -2-Ethylhexyl ethylhexanoate, 2-ethylhexyl octanoate, (caprylic acid / capric acid) 2-ethylhexyl, methyl palmitate, ethyl palmitate, isopropyl palmitate, dicaprilyl carbonate, isopropyl lauroyl sarcosate, isononyl isononanoate, palmitin Ethylhexyl acidate, isohexyl laurate, hexyl laurate, isocetyl stearate, isopropyl isostearate, isopropyl myristate, isodecyl oleate, tri (2-ethylhexanoic acid) glyceryl, tetra (2-ethylhexanoic acid) pentaerythricyl, succinate Examples thereof include 2-ethylhexyl acid acid, diethyl sebacate, and mixtures thereof.

Examples of artificial triglycerides include, for example, capryl capryl glyceride, glyceryl trimyristate, glyceryl tripalmitate, glyceryl trilinolenate, glyceryl trilaurate, glyceryl tricaprate, glyceryl tricaprylate, tri (capric acid / caprylic acid) glyceryl Tri (capric acid / caprylic acid / linolenic acid) glyceryl can be mentioned.

Examples of silicone oils include, for example, linear organopolysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane; cyclic organopolysiloxanes such as octamethylcyclotetra. Siloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc .; and mixtures thereof.

Preferably, the silicone oil is selected from liquid polydialkylsiloxanes, in particular liquid polydimethylsiloxane (PDMS), and liquid polyorganosiloxanes containing at least one aryl group.

These silicone oils may also be organically modified. Organically modified silicones that can be used in accordance with the present invention are silicone oils as defined above, which are silicone oils containing one or more organic functional groups bonded by hydrocarbon groups in their structures. ..

Organopolysiloxane is defined in more detail in Walter Noll's "Chemistry and Technology of Silicones" (1968) Academic Press. These may be volatile or non-volatile.

If they are volatile, the silicone is more specifically selected from those having a boiling point between 60 ° C and 260 ° C, and more specifically from the following:
(i) Cyclic polydialkylsiloxane containing 3-7, preferably 4-5 silicon atoms. These are, for example, octamethylcyclotetrasiloxane sold by Union Carbide under the name Volatile Silicone® 7207 or by Rhodia under the name Silbione® 70045 V2, by Union Carbide. Decamethylcyclopentasiloxane sold by Rhodia under the name Silbione® 70045 V5 under the name Volatile Silicone® 7158, and Dodeca sold by Momentive Performance Materials under the name Silsoft 1217. Methylcyclopentasiloxane, and mixtures thereof. Cyclocopolymers of the type such as dimethylsiloxane / methylalkylsiloxane of the following formula, such as Silicone Volatile® FZ 3109 sold by Union Carbide, can also be mentioned.

Also, for example, a mixture of octamethylcyclotetrasiloxane and tetratrimethylsilylpentaerythritol (50/50) and octamethylcyclotetrasiloxane and oxy-1,1'-bis (2,2,2', 2', 3, Examples thereof include a mixture of a cyclic polydialkyl siloxane and an organosilicon compound, such as a mixture of 3'-hexatrimethylsilyloxy) neopentane.
(ii) A linear volatile polydialkylsiloxane containing 2 to 9 silicon atoms and having a viscosity ^{of 5 × 10 -6} m ^{2 / s or less at 25 ° C.} An example is the decamethyltetrasiloxane sold under the name SH 200, especially by Toray Silicone. Silicones belonging to this category are also described in the paper published in Cosmetics and Toiletries, Vol. 91, January 1976, pp. 27-32, Todd & Byers "Volatile Silicone Fluids for Cosmetics". Silicone viscosities are measured at 25 ° C. according to ASTM Standard 445 Appendix C.

Non-volatile polydialkylsiloxane can also be used. More specifically, these non-volatile silicones are selected from polydialkylsiloxanes, among which polydimethylsiloxanes containing a trimethylsilyl end group can be predominantly mentioned.

Among these polydialkylsiloxanes, the following commercial products can be mentioned without limitation:
--Silbione® 47 and 70 047 series of Silbione® oils or Mirasil® oils sold by Rhodia, such as 70 047 V 500 000 oils,
--Mirasil® series oils sold by Rhodia,
--Dow Corning 200 series oils, such as DC200 with a viscosity of 60000 mm ² / s, and
--General Electric's Viscasil® oil and General Electric's SF series specific oils (SF 96, SF 18).

Polydimethylsiloxane containing a dimethylsilanol end group, known as dimethiconol (CTFA), such as Rhodia's 48 series oils can also be mentioned.

Among the silicones containing an aryl group, polydiarylsiloxane, particularly polydiphenylsiloxane and polyalkylarylsiloxane, for example, phenylsilicone oil can be mentioned.

The phenylsilicone oil may be selected from the following phenylsilicone formulas:

(During the ceremony,
R ₁ to R ₁₀ are independent of each other, saturated or unsaturated, linear, cyclic or branched C _{1 to} C ₃₀ hydrocarbon groups, preferably C _{1 to} C ₁₂ hydrocarbon groups, and more. Preferred are C _{1 to} C ₆ hydrocarbon groups, especially methyl, ethyl, propyl or butyl groups.
m, n, p and q are independent of each other, 0 to 900 (including the values at both ends), preferably 0 to 500 (including the values at both ends), and more preferably 0 to 100 (including the values at both ends). Is an integer of
However, the sum of n + m + q is other than 0).

Examples that can be given are products sold under the following names:
--70 641 series of Silbione® oils from Rhodia,
--Rhodia Rhodorsil® 70 633 and 763 series oils,
--Dow Corning 556 Cosmetic Grade Fluid Oil, manufactured by Dow Corning
--Bayer PK series silicones, such as PK20 products,
--Specific oils of the SF series manufactured by General Electric, such as SF 1023, SF 1154, SF 1250 and SF 1265.

As the phenylsilicone oil, phenyltrimethicone (in the above formula, R ₁ to R ₁₀ are methyl, p, q, and n = 0, and m = 1) is preferable.

The organically modified liquid silicone may contain, among other things, a polyethylene oxy group and / or a polypropylene oxy group. Therefore, silicone KF-6017 proposed by Shin-Etsu Chemical Co., Ltd., and Silwet® L722 oil and L77 oil manufactured by Union Carbide can be mentioned.

Hydrocarbon oils can be selected from:
--Linear or branched, optionally cyclic C _6- C ₁₆ lower alkanes. Examples that can be mentioned include hexane, undecane, dodecane, tridecane, hemisqualene, and isoparaffin, such as isohexadecane, isododecane and isodecan, and
--Contains linear or branched hydrocarbons containing more than 16 carbon atoms, such as liquid paraffin, liquid petroleum jelly, polydecene and hydrogenated polyisobutene, such as Parleam®, and squalane. Is done.

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; polyisobutene hydride. , Isoeicosan and decene / butene copolymers; and mixtures thereof.

The term "fat" in fatty alcohols means one containing a relatively large number of carbon atoms. Therefore, alcohols having 4 or more, preferably 6 or more, more preferably 12 or more carbon atoms are included in the range of fatty alcohols. Fatty alcohols may be saturated or unsaturated. The fatty alcohol may be linear or branched.

Fatty alcohols are saturated and unsaturated in structure R-OH (in the formula, R contains 4 to 40 carbon atoms, preferably 6 to 30 carbon atoms, more preferably 12 to 20 carbon atoms. It may have (chosen from saturated, linear and branched groups). In at least one embodiment, R can be selected from _{C 12-} C ₂₀ alkyl groups and C _12- C _{20 alkenyl groups.} R may or may not be substituted with at least one hydroxyl group.

Examples of fatty alcohols include lauryl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, undecylenyl alcohol, myristyl alcohol, octyldodecanol, hexyldecanol, oleyl alcohol, linoleil alcohol, palmitrail alcohol, arachidnyl alcohol, Elsyl alcohols and mixtures thereof can be mentioned.

The fatty alcohol is preferably a saturated fatty alcohol.

Therefore, the fatty alcohol is a linear or branched, saturated or unsaturated C _{6 to} C ₃₀ alcohol, preferably a linear or branched, saturated C _{6 to} C ₃₀ alcohol, more preferably. You can choose from linear or branched, saturated C _{12 to} C _{20 alcohols.}

Here, the term "saturated fatty alcohol" means an alcohol having a long-chain aliphatic saturated carbon chain. The saturated fatty alcohol is preferably selected from any linear or branched saturated C _{6 to} C _{30 fatty alcohol.} Among the linear or branched saturated C _{6 to} C ₃₀ fatty alcohols, the linear or branched saturated C _{12 to} C ₂₀ fatty alcohols may be preferably used. Any linear or branched saturated C _16- C ₂₀ fatty alcohols may be more preferably used. Branched C _16- C ₂₀ fatty alcohols may 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. In one embodiment, cetyl alcohol, stearyl alcohol, octyldodecanol, hexyldecanol, or mixtures thereof (eg, cetearyl alcohol) and behenyl alcohol can be used as saturated fatty alcohols.

According to at least one embodiment, the fatty alcohol used in the composition according to the invention is preferably selected from octyldodecanol, hexyldecanol and mixtures thereof.

Here, the term "Hansen solubility parameter" means the solubility parameter defined by C. M. Hansen in "Hansen Solubility Parameters: A User's Handbook", by Charles M. Hansen, CRC Press (2007). (a) Oil can be defined by 3 points in 3D space, these 3 points are known as Hansen solubility parameter (HSP) which can be defined as follows.

The solubility parameter used in the present specification is a calculated numerical constant, and is (a) a convenient tool for estimating the behavior of oil. There are three empirically and theoretically derived Hansen solubility parameters: the dispersion force component (δ _d ), the polar or dipole interaction component (δ _p ) and the hydrogen bond component (δ _h). Each of the three parameters (ie, dispersion, polarity and hydrogen bonding) represents a different dissolving power property or solvent capacity. Combined, the three parameters provide a measure of the overall strength and selectivity of the solvent. The total Hansen solubility parameter is the square root of the sum of squares of the three parameters described above, and (a) provides a more general description of the dissolving power of the oil. The individual and total solubility parameter units are expressed in ^{(MPa) 0.5.}

The global solubility parameter δ by the Hansen solubility space is defined by the following relational expression in the literature “Solubility parameter values”, by Eric A. Gruike, “Polymer Handbook”, 3rd edition, Chapter VII, pp. 519-559:
δ ² = δ _d ² + δ _p ² + δ _h ²
[During the ceremony,
δ _d characterizes the London dispersion force resulting from the formation of dipoles induced during molecular collisions.
δ _p characterizes the Debye interaction force between permanent dipoles,
δ _{h characterizes} a particular interaction force (eg, hydrogen bond, acid / base, donor / acceptor, etc.)].

The oil (a) used in the composition according to the invention preferably has a Hansen solubility parameter (δ) in the range of ^{13.5 to 18 MPa 0.5} , preferably 14.0 to 17.5 MPa ^0.5 , more preferably 14.5 to 17 MPa ^0.5.

(a) The oil is preferably selected from hydrocarbon oils, vegetable oils, and mixtures thereof.

(a) The oil is preferably selected from dodecane, hemi squalene, squalane, coconut oil, and mixtures thereof.

The amount of (a) oil in the composition according to the present invention is 1% by mass or more, preferably 3% by mass or more, and more preferably 5% by mass or more, based on the total mass of the composition.

The amount of (a) oil in the composition according to the present invention may be 25% by mass or less, preferably 20% by mass or less, more preferably 15% by mass or less, based on the total mass of the composition.

The amount of (a) oil in the composition according to the present invention is 1% by mass to 25% by mass, preferably 3% by mass to 20% by mass, and more preferably 5% by mass to 15% by mass with respect to the total mass of the composition. It may be% by mass.

(emulsifier)
The composition according to the invention (b) comprises at least one emulsifier. When two or more (b) emulsifiers are used, they may be the same or different.

(b) The type of emulsifier is not limited. Therefore, for example, an amphipathic powder may be used as (b) an emulsifier. In this case, the composition according to the present invention may be in the form of a pickering emulsion.

(b) The emulsifier is preferably selected from surfactants.

Therefore, the composition according to the invention may contain at least one surfactant. Two or more surfactants may be used in combination. Therefore, a single type of surfactant or a combination of different types of surfactant can be used.

The surfactant used in the present invention is preferably a nonionic surfactant from the group consisting of anionic surfactants, amphoteric surfactants, cationic surfactants, nonionic surfactants, and mixtures thereof. You can choose from activators.

(c-1) Anionic Surfactant The composition according to the present invention may contain at least one anionic surfactant. Two or more anionic surfactants may be used in combination.

Anionic surfactants are (C _{6 to} C ₃₀ ) alkyl sulphates, (C _{6 to} C ₃₀ ) alkyl ether sulphates, (C _{6 to} C ₃₀ ) alkyl amide ether sulphates, alkylaryl polyethers sulphates, Monoglyceride sulfate; (C _{6 to} C ₃₀ ) alkyl sulfonate, (C _{6 to} C ₃₀ ) alkyl amide sulfonate, (C _{6 to} C ₃₀ ) alkyl aryl sulfonate, α-olefin sulfonate, paraffin sulfonate; (C _{6 to} C ₃₀₎ ) Alkyl phosphate; (C _{6 to} C ₃₀ ) alkyl sulfosuccinate, (C _{6 to} C ₃₀ ) alkyl ether sulfosuccinate, (C _{6 to} C ₃₀ ) alkylamide sulfosuccinate; (C ₆ to C 30) ₃₀ ) Alkyl sulfoacetate; (C _{6 to} C ₂₄ ) acyl sarcosinate; (C _{6 to} C ₂₄ ) acyl glutamate; (C _{6 to} C ₃₀ ) alkyl polyglycoside carboxyl ether; (C _{6 to} C ₃₀ ) alkyl poly Glycoside sulfosuccinate; (C _{6 to} C ₃₀ ) alkyl sulfosuccinate; (C _{6 to} C ₂₄ ) acyl acetylate; N- (C _{6 to} C ₂₄ ) acyl taurate; C _{6 to} C ₃₀ fatty acids Salt; Palm oil fatty acid salt or hydrogenated palm oil fatty acid salt; (C _{8 to} C ₂₀ ) acyl amide; (C _{6 to} C ₃₀ ) Alkyl-D-galactosidouronate; Polyoxyalkyleneized (C _{6 to} C) ₃₀ ) Alkyl ether carboxylates; polyoxyalkyleneized (C _{6 to} C ₃₀ ) alkylaryl ether carboxylates; and polyoxyalkyleneized (C _{6 to} C ₃₀ ) alkylamide ether carboxylates; and corresponding acids It is preferably selected from the group consisting of morphologies.

In at least one embodiment, the anionic surfactant is in the form of a salt, eg, a salt of an alkali metal (eg sodium); a salt of an alkaline earth metal (eg magnesium); an ammonium salt; an amine. Salts; and aminoalcohol salts, etc. Depending on the conditions, the anionic surfactant may be in the form of an acid.

Anionic surfactants, (C ₆ ~C ₃₀₎ alkyl sulfates, (C ₆ ~C ₃₀₎ alkyl ether sulfates or be chloride may not be salified polyoxyalkylenated (C ₆ ~ C ₃₀ ) More preferably selected from salts of alkyl ether carboxylic acids.

(c-2) Amphoteric Surfactant The composition according to the present invention may contain at least one amphoteric surfactant. Two or more amphoteric surfactants may be used in combination.

Amphoteric or zwitterionic surfactants are, for example (to enumerate non-limitingly), amine derivatives such as aliphatic secondary or tertiary amines, and optionally quaternized amine derivatives. The aliphatic group may be straight, containing 8 to 22 carbon atoms and containing at least one water-solubilized anionic group (eg, carboxylate, sulfonate, sulfate, phosphate or phosphonate). It is a chain or branched chain.

The amphoteric surfactant can preferably be selected from the group consisting of betaine and amidamine carboxylated derivatives.

The amphoteric surfactant is preferably selected from betaine-type surfactants.

Betaine-type amphoteric tensides include alkyl betaine, alkylamide alkyl betaine, sulfobetaine, phosphobetaine and alkylamide alkylsulfobetaine, specifically (C _{8 to} C ₂₄ ) alkyl betaine, (C _{8 to} C ₂₄ ) alkyl. It is preferably selected from the group consisting of amides (C _{1 to} C ₈ ) alkyl betaines, sulfobetaines, and (C _{8 to} C ₂₄ ) alkylamides (C _{1 to} C _{8) alkyl sulfobetaines.} In one embodiment, the betaine amphoteric surfactant is selected from (C _{8 to} C ₂₄ ) alkyl betaine, (C _{8 to} C ₂₄ ) alkyl amide (C _{1 to} C ₈ ) alkyl sulfobetaine, sulfobetaine and phosphobetaine. Will be done.

Non-limiting examples that can be mentioned include cocobetaine, lauryl betaine, cetyl betaine, coco / oleamide propyl betaine, cocamidopropyl betaine, palmitamide propyl betaine, stealamide propyl betaine, alone or as a mixture. , Cocamidoethyl betaine, cocamidopropyl hydroxysultaine, oleamide propyl hydroxysultaine, coco hydroxysultaine, lauryl hydroxysultaine, and cocosstein, CTFA International Cosmetic Ingredient Dictionary & Handbook, 15th Edition, 2014 Includes compounds classified in.

The betaine-type amphoteric surfactant is preferably alkyl betaine and alkylamide alkyl betaine, in particular cocobetaine and cocamidopropyl betaine.

Among the amidamine carboxylated derivatives, CTFA Dictionary, 3rd Edition, 1982 under the names of anhocarboxyglycinate and anhocarboxypropionate, which are described in US Pat. Nos. 2,528,378 and 2,781,354 and have the following structural formulas, respectively. Examples include products sold under the name Miranol, classified by year (this disclosure is incorporated herein by reference).

^{_{R 1 -CONHCH 2 CH 2 -N +}} (R 2) (R 3) (CH 2 COO -) M + X - (B1)

[During the ceremony,
R ₁ represents the alkyl group, heptyl, nonyl, or undecylic group of _{the acid R 1-} COOH present in hydrolyzed coconut oil.
R ₂ indicates a β-hydroxyethyl group,
R ₃ indicates a carboxymethyl group,
M ⁺ indicates a cationic ion derived from an alkali metal such as sodium; an ammonium ion; or an ion derived from an organic amine.
X ^- is a halide ion, acetate ion, phosphate ion, nitrate ion, alkyl (C _{1 to} C ₄ ) sulfate ion, alkyl (C _{1 to} C ₄ )-or alkyl (C _{1 to} C ₄ ) aryl-sulfon. Shows acid ions, especially organic or inorganic anionic ions such as methyl sulphate and ethyl sulphate; or M ⁺ and X ^- are absent];

_{R 1 '-CONHCH 2 CH 2 -N} (B) (C) (B2)

[During the ceremony,
R ₁ 'is an acid R ₁ present in coconut oil or hydrolysed linseed oil' alkyl _{-COOH, C 7, C 9,} C 11 or C ₁₃ alkyl group such as an alkyl group, C ₁₇ alkyl group And its isotype, or unsaturated C ₁₇ groups,
B stands for -CH ₂ CH ₂ OX'
C stands for-(CH ₂ ) _z -Y', where z = 1 or 2
X'indicates -CH ₂ -COOH group, -CH ₂ -COOZ', -CH ₂ CH ₂ -COOH, -CH ₂ CH ₂ -COOZ' or a hydrogen atom.
Y'indicates -COOH, -COOZ', -CH ₂ -CHOH-SO ₃ Z', -CH ₂ -CHOH-SO ₃ H group or -CH ₂ -CH (OH) -SO ₃ -Z' group. ,
Z'represents alkali metal or alkaline earth metal ions such as sodium, organic amine-derived ions, or ammonium ions];
as well as

R _a'' -NH-CH (Y'')-(CH ₂ ) _n -C (O) -NH- (CH ₂ ) _n'- N (Rd) (Re) (B'2)

[During the ceremony,
Y'' is -C (O) OH, -C (O) OZ'', _{-CH 2} -CH (OH) -SO ₃ H or -CH ₂ -CH (OH) -SO ₃ -Z'' ( In the formula, Z'' indicates a cationic ion derived from an alkali metal such as sodium or an alkaline earth metal, an ion derived from an organic amine, or an ammonium ion).
Rd and Re represent C _{1 to} C ₄ alkyl groups or C _{1 to} C ₄ hydroxyalkyl groups.
R _a'' indicates a C _10- C ₃₀ alkyl or alkenyl group from an acid,
n and n'independently represent integers from 1 to 3].

The amphoteric surfactants of formulas B1 and B2 are (C _{8 to} C ₂₄ ) alkyl anhomonoacetates, (C _{8 to} C ₂₄ ) alkyl amphodiacetates, (C _{8 to} C ₂₄ ) alkyl anhomonopropionates and It is preferably selected from (C _{8 to} C _{24) alkyl amphoteric propionates.}

These compounds are listed in the CTFA Dictionary, 5th Edition, 1993, as disodium cocoamphodiacetic acid, disodium lauroanphodiacetic acid, disodium caprylamphodiacetic acid, disodium capryloanphodiacetic acid, disodium cocoamphodipropionate, lauroanphopropionic acid. It is classified by the names of disodium, disodium caprylamphodipropionate, disodium caprylamphodipropionate, lauroamphodipropionic acid and cocoamphodipropionic acid.

An example is cocoamphodiacetate sold by Rhodia Chimie under the trade name Miranol® C2M Condensate.

Among the compounds of formula (B'2), diethylaminopropyl cocoa spartamide sodium (CTFA), which is marketed by CHIMEX under the name CHIMEXANE HB, can be mentioned.

(c-3) Cationic Surfactant The composition according to the present invention may contain at least one cationic surfactant. Two or more kinds of cationic surfactants may be used in combination.

The cationic surfactant can be selected from the group consisting of optionally polyoxyalkyleneized primary, secondary or tertiary fatty amine salts, quaternary ammonium salts, and mixtures thereof.

Examples of quaternary ammonium salts that can be mentioned include, but are not limited to:
The following general formula (B3):

(During the ceremony,
R ₁ , R ₂ , R ₃ and R ₄ may be the same or different and are linear, containing 1 to 30 carbon atoms and optionally heteroatoms such as oxygen, nitrogen, sulfur and halogen. (Selected from morphic and branched aliphatic groups). The aliphatic groups include, for example, an alkyl group, an alkoxy group, a C _{2 to} C ₆ polyoxyalkylene group, an alkylamide group, a (C _{12 to} C ₂₂ ) alkylamide (C _{2 to} C ₆ ) alkyl group, and (C ₁₂ to C 6). C ₂₂ ) Alkyl acetate and hydroxyalkyl groups; and aromatic groups such as aryl and alkylaryl groups can be selected; X ^- is a halide ion, a phosphate ion, an acetate ion, a lactate ion, (C _{2 to} C ₆ ) Alkyl sulfate ion and selected from alkyl sulfonic acid ion or alkylaryl sulfonic acid ion);
A quaternary ammonium salt of imidazoline, such as that of formula (B4):

(During the ceremony,
R ₅ is selected from alkenyl and alkyl groups containing 8 to 30 carbon atoms, such as tallow or coconut fatty acid derivatives.
R ₆ is hydrogen, C ₁ -C ₄ alkyl group, and are selected from alkenyl and alkyl groups containing 8 to 30 carbon atoms,
R ₇ is _{selected from C 1 to} C ₄ alkyl groups,
R ₈ is selected from hydrogen and C ₁ -C ₄ alkyl group,
X ^- is selected from halide ion, phosphate ion, acetate ion, lactate ion, alkyl sulfate ion, alkyl sulfonate ion and alkylaryl sulfonate ion). In one embodiment, R ₅ and R ₆ are a mixture of groups selected from, for example, alkenyl and alkyl groups containing 12 to 21 carbon atoms, eg, fatty acid derivatives of tallow, and R ₇ is methyl. R ₈ is hydrogen. Examples of such products include Quotanium-27 (CTFA 1997) and Quotanium-83 (CTFA 1997) sold by Witco under the names "Rewoquat®" W75, W90, W75PG and W75HPG. However, but not limited to these;
Di or triquaternary ammonium salt of formula (B5):

(During the ceremony,
R ₉ is selected from aliphatic groups containing 16 to 30 carbon atoms,
R ₁₀ is selected from hydrogen, alkyl groups containing 1 to 4 carbon atoms, or (CH ₂ ) ₃ (R _16a ) (R _17a ) (R _18a ) N ⁺ X- groups.
R _11, R ₁₂ , R ₁₃ , R ₁₄ , R _16a , R _17a , and R _18a may be the same or different and are selected from hydrogen and alkyl groups containing 1 to 4 carbon atoms. ,
X ^- is selected from halide ion, acetate ion, phosphate ion, nitrate ion, ethyl sulfate ion and methyl sulfate ion).

An example of such a quaternary ammonium salt is FINETEX FINQUAT CT-P (Quaternium-89) or FINQUAT CT (Quaternium-75);
And quaternary ammonium salts containing at least one ester functional group, such as those of formula (B6):

(During the ceremony,
R ₂₂ is selected from C _{1 to} C ₆ alkyl groups, as well as C _{1 to} C ₆ hydroxyalkyl groups and dihydroxyalkyl groups.
R ₂₃ is
The following groups:

Selected from linear and branched saturated and unsaturated C _1-2 C ₂₂ hydrocarbon groups R ₂₇ , as well as hydrogen.
R ₂₅ is
The following groups:

Selected from linear and branched saturated and unsaturated C _{1 to} C ₆ hydrocarbon groups R ₂₉ , as well as hydrogen.
R ₂₄ , R ₂₆ and R ₂₈ may be the same or different and are selected from linear and branched saturated and unsaturated C _7- C ₂₁ hydrocarbon groups.
r, s and t may be the same or different and are selected from integers in the range 2-6.
Each of r1 and t1 may be the same or different, 0 or 1, r2 + r1 = 2r and t1 + 2t = 2t.
y is selected from integers in the range 1-10,
x and z may be the same or different and are selected from integers in the range 0-10.
X ^- is selected from simple and complex organic and inorganic anions, where the sum x + y + z is in the range 1 to 15 and if x is 0, then R ₂₃ is R ₂₇ . If z is 0, then R ₂₅ is conditioned on _{R 29.} R ₂₂ can be selected from linear and branched alkyl groups. In one embodiment, R ₂₂ is selected from linear alkyl groups. In another embodiment, R ₂₂ is selected from a methyl group, an ethyl group, a hydroxyethyl group, and a dihydroxypropyl group, eg, from a methyl group and an ethyl group. In one embodiment, the sum x + y + z is in the range 1-10. If R ₂₃ is a hydrocarbon group R ₂₇ , it may be long chain and contain 12 to 22 carbon atoms, or short chain and may contain 1 to 3 carbon atoms. .. If R ₂₅ is a hydrocarbon group R ₂₉ , it may contain, for example, 1 to 3 carbon atoms. As a non-limiting example, in one embodiment, R ₂₄ , R ₂₆ and R ₂₈ may be the same or different, linear and branched, saturated and unsaturated C ₁₁ to. It is selected from C ₂₁ hydrocarbon-based groups, eg, linear and branched, saturated and unsaturated C _11- C ₂₁ alkyl and alkenyl groups. In another embodiment, x and z may be the same or different, 0 or 1. In one embodiment, y is equal to 1. In another embodiment, r, s and t may be the same or different and are equal to 2 or 3, for example equal to 2. Anion X ^- is, for example, halide ions, such as chloride, bromide and iodide ions; can be selected and C ₁ -C ₄ alkylsulfate ion, for example methyl sulfate. However, methanesulfonate ions, phosphate ions, nitrate ions, tosylate ions, anions derived from organic acids such as acetate and lactate ions, and any other anion compatible with ammonium containing ester functional groups are present. Other non-limiting examples of anions that can be used in accordance with the invention. In one embodiment, the anion X ^- is selected from chloride and methylsulfate ions.

In another embodiment
R ₂₂ is selected from methyl and ethyl groups, where x and y are equal to 1.
z is equal to 0 or 1
r, s and t are equal to 2
R ₂₃
The following groups:

Selected from methyl, ethyl, and C _14- C ₂₂ hydrocarbon groups, hydrogen,
R ₂₅ ,
The following groups:

And selected from hydrogen,
R ₂₄ , R ₂₆ and R ₂₈ may be the same or different and are selected from linear and branched, saturated and unsaturated C _13- C ₁₇ hydrocarbon-based groups, eg, Selected from linear and branched, saturated and unsaturated C _13- C ₁₇ alkyl and alkenyl groups,
The ammonium salt of formula (B6) can be used.

In one embodiment, the hydrocarbon group is linear.

Non-limiting examples of compounds of formula (B6) that can be mentioned include diacyloxyethyl-dimethylammonium, diacyloxyethyl-hydroxyethyl-methylammonium, monoacyloxyethyl-dihydroxyethyl-methylammonium, triacyloxyethyl-. Includes salts of methylammonium, monoacyloxyethyl-hydroxyethyl-dimethyl-ammonium, such as chlorides and methylsulfates, and mixtures thereof. In one embodiment, the acyl group may contain 14 to 18 carbon atoms and may be derived from, for example, vegetable oils such as palm oil and sunflower oil. If the compound contains several acyl groups, these groups may be the same or different.

These products are obtained, for example, by directly transesterifying an optionally oxyalkyleneized triethanolamine, triisopropanolamine, alkyldiethanolamine or alkyldiisopropanolamine to a fatty acid or a mixture of fatty acids of plant origin. Alternatively, it can be obtained by transesterifying those methyl esters. After this esterification, an alkylating agent may be used to quaternize the alkylating agent with alkyl halides such as methyl halide and ethyl halide; dialkyl sulfates such as dimethyl sulfate and diethyl sulfate; methane. It is selected from methyl sulfonate; methyl para-toluene sulfonate; glycol chlorohydrin; and glycerol chlorohydrin.

Such compounds are, for example, named Dehyquart® by Cognis, Stepanquat® by Stepan, Noxamium® by Ceca, and "Rewoquat" by Rewo-Goldschmidt. (Registered trademark) WE 18 ”.

Other non-limiting examples of ammonium salts that can be used in the compositions according to the invention are ammonium containing at least one ester functional group described in US Pat. Nos. 4,874,554 and 4,137,180. Contains salt.

The above-mentioned quaternary ammonium salts that can be used in the composition according to the present invention include those corresponding to the formula (I), for example, tetraalkylammonium chloride, for example, dialkyldimethylammonium chloride and alkyltrimethylammonium chloride ( Its alkyl group contains about 12 to 22 carbon atoms), such as behenyltrimethylammonium chloride, distearyldimethylammonium chloride, cetyltrimethylammonium chloride and benzyldimethylstearylammonium chloride; palmitylamide propyltrimethylammonium chloride; and Van. Examples include, but are not limited to, stearamide propyl dimethyl (myristyl acetate) ammonium chloride sold by Dyk under the name "Ceraphyl® 70".

According to one embodiment, the cationic surfactants that can be used in the compositions according to the invention are behenyl trimethylammonium chloride, cetyltrimethylammonium chloride, quaternium-83, quaternium-87, quaternium-22, behenyl chloride. It is selected from amidopropyl-2,3-dihydroxypropyldimethylammonium, palmitylamidepropyltrimethylammonium chloride, and stearamidepropyldimethylamine.

(c-4) Nonionic Surfactant The composition according to the present invention may contain at least one nonionic surfactant. Two or more nonionic surfactants may be used in combination.

Nonionic surfactants are compounds well known by themselves or by themselves (eg, "Handbook of Surfactants", MRPorter, Blackie & Son Publishing (Glasgow and London), 1991, pp. 116-178). Please refer to). Thus, the nonionic surfactant can be selected from, for example, esters of alcohols, alpha-diols, alkylphenols and fatty acids, these compounds being ethoxylated, propoxylated or glycerolified, eg 8 to It has at least one fatty chain containing 30 carbon atoms, can have a number of ethylene oxide or propylene oxide groups in the range of 2-50, and can have a number of glycerol groups in the range of 1-30. Maltose derivatives can also be mentioned. Copolymers of ethylene oxide and / or propylene oxide; condensates of ethylene oxide and / or propylene oxide with fatty alcohols; polyethoxylated fatty amides containing, for example, 2 to 30 mol of ethylene oxide; for example, 1.5 to 5, for example, 1.5 to 4 glycerol. Polyglycerolated fatty amide containing groups; ethoxylated fatty acid ester of sorbitan containing 2 to 30 mol of ethylene oxide; ethoxylated fatty acid ester of plant origin; fatty acid ester of sucrose; fatty acid ester of polyethylene glycol; glycerol (C _{6 to} C ₂₄ ) Polyethoxylated fatty acid monoesters or diesters of alkyl polyglycosides; N- (C _6- C ₂₄ ) alkyl glucamine derivatives; (C _10- C ₁₄ ) alkylamine oxides or N- (C _10- C ₁₄ ) acylaminopropyls Amide oxides such as morpholine oxides; silicone surfactants; and mixtures thereof can also be mentioned, but not limited to.

The nonionic surfactant can preferably be selected from monooxyalkyleneized, polyoxyalkyleneized, monoglycerolized, or polyglycerolized nonionic surfactants. The oxyalkylene unit is more specifically oxyethylene or oxypropylene unit, or a combination thereof, and is preferably an oxyethylene unit.

Examples of monooxyalkyleneed or polyoxyalkyleneed nonionic surfactants that can be mentioned include:
Monooxyalkyleneized or polyoxyalkyleneized (C _{8 to} C ₂₄ ) alkylphenols,
Saturated or unsaturated, linear or branched, monooxyalkyleneized or polyoxyalkyleneized C _8- C ₃₀ alcohols,
Saturated or unsaturated, linear or branched, monooxyalkyleneated or polyoxyalkyleneized C _8- C ₃₀ amides,
Saturated or unsaturated, linear or branched C _{8 to} C ₃₀ acids and esters of monoalkylene glycols or polyalkylene glycols,
Saturated or unsaturated, linear or branched C _{8 to} C ₃₀ acids and sorbitol monooxyalkylene or polyoxyalkyleneized esters,
Saturated or unsaturated, monooxyalkyleneated or polyoxyalkyleneed vegetable oils, and condensates of ethylene oxide and / or propylene oxide, especially alone or as a mixture.

Surfactants preferably contain ethylene oxide and / or propylene oxide having a number of moles between 1 and 100, preferably between 1 and 50, and more preferably between 1 and 20.

According to one of the embodiments of the present invention, the monooxyalkyleneized nonionic surfactant is monooxyethylene fatty alcohol (ether of ethylene glycol and fatty alcohol), monooxyethylene fatty acid ester (ethylene glycol). And fatty acid esters), and mixtures thereof.

Examples of monooxyalkyleneized fatty acid esters that can be mentioned include glycol distearate.

According to one of the embodiments of the present invention, the polyoxyalkyleneized nonionic surfactant is polyoxyethylene glycol fatty alcohol (ether of polyethylene glycol and fatty alcohol), polyoxyethylene glycol fatty acid ester (polyethylene glycol). And an ester of fatty acid), and mixtures thereof.

Examples of polyoxyethylene saturated fatty alcohols (or C _{8 to} C ₃₀ alcohols) that can be mentioned include ethylene oxide adducts of lauryl alcohol, especially those containing 2 to 20 oxyethylene units, more specifically 2 Containing 10 oxyethylene units (CTFA name: Laures-2 to Laures-20); Behenyl alcohol ethylene oxide adducts, especially those containing 2 to 20 oxyethylene units (CTFA name: Behenes) -2 to Behenes-20); Ethylene oxide adducts of cetearyl alcohol (mixture of cetyl alcohol and stearyl alcohol), especially those containing 2 to 20 oxyethylene units (CTFA names: Ceteares-2 to Ceteares-20) ); Ethylene oxide adducts of cetyl alcohol, especially those containing 2 to 20 oxyethylene units (CTFA names: Setes-2 to Setes-20); Stearyl alcohol ethylene oxide adducts, especially 2 to 20 oxy Those containing ethylene units (CTFA names from Steareth-2 to Steareth-20); Ethylene oxide adducts of isostearyl alcohol, especially those containing 2 to 20 oxyethylene units (CTFA names from Isosteares-2) Isosteales-20); as well as mixtures thereof.

Examples of polyoxyethylene unsaturated fatty alcohols (or C _{8 to} C ₃₀ alcohols) that can be mentioned include those containing ethylene oxide adducts of oleyl alcohol, especially those containing 2 to 20 oxyethylene units, to be more specific. Includes those containing 2 to 10 oxyethylene units (CTFA names: Oles-2 to Oles-20); and mixtures thereof.

Monoglycerolized or polyglycerolized As an example of a nonionic surfactant, monoglycerolized or polyglycerolized C _{8 to} C ₄₀ alcohols are preferably used.

In particular, monoglycerolized or polyglycerolated C _{8 to} C ₄₀ alcohols correspond to:

RO- [CH ₂ -CH (CH ₂ OH) -O] _m -H, or RO- [CH (CH ₂ OH) -CH ₂ O] _m -H

[In the formula, R represents a linear or branched C _{8 to} C ₄₀ , preferably C _{8 to} C ₃₀ alkyl or alkenyl group, and m is in the range of 1 to 30, preferably 1.5 to 10. Represents a number].

Examples of suitable compounds in relation to the present invention are lauryl alcohol containing 4 mol of glycerol (INCI name: polyglyceryl-4 lauryl ether), lauryl alcohol containing 1.5 mol of glycerol, and oleyl alcohol containing 4 mol of glycerol. (INCI name: polyglyceryl-4 oleyl ether), oleyl alcohol containing 2 mol of glycerol (INCI name: polyglyceryl-2 oleyl ether), cetearyl alcohol containing 2 mol of glycerol, cetearyl alcohol containing 6 mol of glycerol, Examples include oleocetyl alcohol containing 6 mol of glycerol and octadecanol containing 6 mol of glycerol.

Alcohols may represent a mixture of alcohols, just as the value of m represents a statistical value, even if multiple polyglycerolated fatty alcohols coexist in the form of a mixture in commercial products. It means good.

Among monoglycerolized or polyglycerolated alcohols, use C ₈ / C ₁₀ alcohol containing 1 mol of glycerol, C ₁₀ / C ₁₂ alcohol containing 1 mol of glycerol, and C ₁₂ alcohol containing 1.5 mol of glycerol. It is preferable to do so.

Monoglycerolated or polyglycerolized C _8- C ₄₀ fatty acid esters can correspond to the following equations:

R'O-[CH ₂ -CH (CH ₂ OR'')-O] _m -R'', or R'O-[CH (CH ₂ OR''')-CH ₂ O] _m -R''

[In the formula, each of R', R'' and R''' is independently a hydrogen atom, or a linear or branched C _{8 to} C ₄₀ , preferably C _{8 to} C ₃₀ alkyl-. Represents a CO- or alkenyl-CO- group, provided that at least one of R', R'' and R''' is not a hydrogen atom, m from 1 to 30, preferably from 1.5. Represents a number in the range of 10.

Examples of polyoxyethyleneylated fatty acid esters that can be mentioned include ethylene oxide adducts with esters of lauric acid, palmitic acid, stearic acid or behenic acid and mixtures thereof, in particular PEG-2 to PEG-20 laurates. (CTFA name: PEG-2 laurate to PEG-20 laurate), PEG-2 palmitate to PEG-20 palmitate (CTFA name: PEG-2 palmitate to PEG-20 palmitate), PEG-2 stearate From PEG-20 (CTFA name: PEG-2 stearate to PEG-20 stearate), PEG-2 palmitostearate to PEG-20, PEG-2 behenate to PEG-20 (CTFA name: PEG-behate) 2 to PEG-20 behenate), and mixtures thereof, etc., which contain 2 to 20 oxyethylene units.

According to one of the embodiments of the present invention, the nonionic surfactant is saturated or unsaturated with a polyol and, for example, 8 to 24 carbon atoms, preferably 12 to 22 carbon atoms. esters of fatty acids having a chain, and preferably 10 to 200, more preferably the polyoxyalkylenated derivatives having 10 to 100 oxyalkylene units, for example, a C ₈ -C _24, preferably C ₁₂ ~ A glyceryl ester of the fatty acid (s) of C ₂₂ and its polyoxyalkyleneized derivative having preferably 10 to 200, more preferably 10 to 100 oxyalkylene units; C _{8 to} C ₂₄ , preferably C ₁₂ A sorbitol ester of a fatty acid (s) of ~ C ₂₂ and its polyoxyalkyleneized derivative having preferably 10 to 200, more preferably 10 to 100 oxyalkylene units; C _{8 to} C ₂₄ , preferably C Sugar (sculose, maltose, glucose, fructose and / or alkylglycose) esters of fatty acids (s) from _{12 to} C _{22 and their polys with preferably 10 to 200, more preferably 10 to 100 oxyalkylene units.} It can be selected from oxyalkyleneized derivatives; ethers of fatty alcohols; ethers of sugars with _{fatty alcohols (s) of C 8 to} C ₂₄ , preferably C _{12 to} C ₂₂ , as well as mixtures thereof.

List the glyceryl esters of fatty acids include glyceryl stearate (mono-, di-, and / or glyceryl tristearate) (CTFA name: glyceryl stearate), glyceryl laurate or glyceryl ricinoleate, and mixtures thereof. As those polyoxyalkyleneized derivatives, mono-, di-, or triester (mono-, di-, or triester of fatty acid and polyalkylene glycol ether of glycerol). Esters), preferably polyoxyethylene stearic acid (mono-, di-, and / or tristearic acid) glyceryl, such as stearic acid (mono-, di-, and / or tristearic acid) PEG-20 glyceryl, and Polyoxyethylene coconut oil fatty acids (mono-, di-, and / or tri-palm oil fatty acids) glyceryl, such as coconut oil fatty acid PEG-7 glyceryl, can be enumerated.

Mixtures of these surfactants, such as products containing glyceryl stearate and PEG-100 stearate, marketed by Uniqema under the name ARLACEL 165, and glyceryl stearate, marketed by Goldschmidt under the name TEGIN. Products containing (glyceryl monostearate and glyceryl distearate) and potassium stearate (CTFA name: glyceryl stearate, SE) and the like can also be used.

The sorbitol esters of C _{8 to} C ₂₄ fatty acids and their polyoxyalkyleneized derivatives contain sorbitan palmitate, sorbitan isostearate, sorbitan trioleate, sorbitan sesquioleate, and fatty acids, for example, 20-100 EOs. Esters with alkoxylated sorbitan, for example, sorbitan monostearate (CTFA name: sorbitan stearate) sold by ICI under the name Span 60, sorbitan monopalmitate (CTFA) sold by ICI under the name Span 40. Name: sorbitan palmitate), and sorbitan tristearate 20 EO (CTFA name: polysorbate 65) sold by ICI under the name Tween 65, polyethylene sorbitan trioleate (polysorbate 85), or trade name Tween by Uniqema. You can choose from 20 or compounds commercially available in Tween 60.

As esters of fatty acids and glucose or alkyl glucose, glucose palmitate, alkyl glucose sesquistearate (methyl glucose sesquistearate, etc.), alkyl glucose palmitate (methyl glucose palmitate, ethyl glucose, etc.), methyl glucoside aliphatic ester, Diester of methyl glucoside and oleic acid (CTFA name: methyl glucose dioleate), mixed ester of methyl glucoside and oleic acid / hydroxystearic acid mixture (CTFA name: methyl glucoside / hydroxystearate), methyl glucoside and isostear Ester with acid (CTFA name: methyl glucose isostearate), ester with methyl glucoside and lauric acid (CTFA name: methyl glucose laurate), monoester and diester mixture of methyl glucoside and isostearic acid (CTFA name: sesqui) Methyl glucose isostearate), a mixture of monoesters and diesters of methyl glucoside and stearic acid (CTFA name: methyl glucose sesquistearate), especially products marketed by AMERCHOL under the name Glucate SS, and mixtures thereof. can do.

As an ethoxylated ether of fatty acid and glucose or alkyl glucose, a polyethylene glycol ether (CTFA name: disteare) having about 20 mol of ethylene oxide of an ethoxylated ether of fatty acid and methyl glucose, particularly a diester of methyl glucose and stearic acid. Acid PEG-20 Methyl Glucose), eg, a product marketed by AMERCHOL under the name Glucam E-20 distearate, a mixture of methyl glucose and stearic acid monoesters and diesters, polyethylene glycol with about 20 mol of ethylene oxide. Ether (CTFA name: PEG-20 methyl glucose sesquistearate), especially products marketed under the name Glucamate SSE-20 by AMERCHOL and products marketed under the name Grillocose PSE-20 by GOLD SCHMIDT, and mixtures thereof. Can be listed as an example.

Examples of sucrose esters include palmito-saccharose stearate, sucrose stearate and sucrose monolaurate.

Alkyl polyglucosides can be used as the sugar ethers, for example, products marketed by Kao Co., Ltd. under the name MYDOL 10, products marketed by Henkel under the name PLANTAREN 2000, and ORAMIX NS 10. Decyl glucosides such as products marketed by Seppic under the name, (capril / capryl) glucosides such as products marketed by Seppic under the name ORAMIX CG 110 or by BASF under the name LUTENSOL GD 70, PLANTAREN Mixed with lauryl glucoside such as products marketed by Henkel under the name of 1200 N and PLANTACARE 1200, coco-glucoside such as products marketed by Henkel under the name PLANTACARE 818 / UP, and in some cases cetostearyl alcohol. Cetostearyl glucosides that are commercially available, for example, by Seppic under the name MONTANO V 68, by Goldschmidt under the name TEGO-CARE CG90, and by Henkel under the name EMULGADE KE3302, arachidyl glucosides such as arachidyl. MONTANO V 82 in the form of a mixture of behenyl alcohol and arachidyl glucoside, commercially available by Seppic under the name MONTANO V 202, cocoyl ethyl glucoside, eg, a mixture of cetyl and stearyl alcohol (35/65). Those commercially available by Seppic, as well as mixtures thereof, can be specifically listed.

Mixtures of glycerides of alkoxylated vegetable oils, such as mixtures of ethoxylated (200 EO) palm and copra (7 EO) glycerides, can also be listed.

The nonionic surfactant according to the present invention can preferably contain an alkenyl or a branched C _{12 to} C ₂₂ acyl chain, such as an oleyl group or an isostearyl group. More preferably, the nonionic surfactant according to the invention is PEG-20 glyceryl triisostearate.

According to one of the embodiments of the present invention, the nonionic surfactant is a copolymer of ethylene oxide and propylene oxide, in particular the following formula:

HO (C ₂ H ₄ O) _a (C ₃ H ₆ O) _b (C ₂ H ₄ O) _c H

[In the formula, a, b and c are integers such that a + c is in the range 2-100 and b is in the range 14-60] from copolymers and mixtures thereof. You can choose.

According to one of the embodiments of the present invention, the nonionic surfactant can be selected from silicone surfactants. Non-limiting examples are those disclosed in the US-A-5364633 and US-A-5411744 literature.

The silicone surfactant is preferably prepared by the following formula (I):

[During the ceremony,
R ₁ , R ₂ and R ₃ are independent of each other, C _{1 to} C ₆ alkyl groups _{or-(CH 2} ) _x- (OCH ₂ CH ₂ ) _y- (OCH ₂ CH ₂ CH ₂ ) _z -OR ₄ groups. At least one R ₁ , R ₂ or R ₃ group is not an alkyl group and R ₄ is a hydrogen, alkyl or acyl group.
A is an integer in the range 0-200
B is an integer in the range 0-50, where A and B cannot be equal to 0 at the same time.
x is an integer in the range 1-6
y is an integer in the range 1-30
z is an integer in the range 0-5].

According to a preferred embodiment of the present invention, in the compound of formula (I), the alkyl group is a methyl group, x is an integer in the range 2-6, and y is in the range 4-30. Is an integer of.

As an example of a silicone surfactant of formula (I), formula (II):

[In the formula, A is an integer in the range 20 to 105, B is an integer in the range 2 to 10, and y is an integer in the range 10 to 20]. ..

As an example of the silicone surfactant of formula (I), formula (III):

_{H- (OCH 2 CH 2) y} - (CH 2) 3 - [(CH 3) 2 SiO] A '- (CH 2) 3 - (OCH 2 CH 2) y -OH (III)

Compounds (where A'and y are integers in the range 10-20) can also be mentioned.

The compounds of the invention that can be used are those sold by Dow Corning under the names DC5329, DC7439-146, DC2-5695 and Q4-3667. Compound DC5329 has 22 A, 2 B, and 12 y, DC7439-146 has 103 A, 10 B, and 12 y, and DC2-5695 has 27 A and 12 B, respectively. 3, y is 12, a compound of formula (II).

Compound Q4-3667 is a compound of formula (III) in which A is 15 and y is 13.

(b) The HLB value of the emulsifier is preferably more than 1.7 and less than 7, preferably more than 2.0 and less than 6.5, and more preferably more than 3.0 and less than 6.0.

(b) The emulsifier is preferably selected from the group consisting of lecithin, glycol distearate, sorbitan sesquioleate, sorbitan trioleate, steares-2, coconut oil fatty acid PEG-7 glyceryl, and mixtures thereof.

(b) It may be preferable to use the first and second emulsifiers as emulsifiers, the first emulsifier has a melting point of less than 5 ° C and the second emulsifier has a melting point of more than 30 ° C. ..

The amount of (b) emulsifier in the composition according to the present invention is 1% by mass or more, preferably 3% by mass or more, and more preferably 5% by mass or more, based on the total mass of the composition.

The amount of (b) emulsifier in the composition according to the present invention may be 25% by mass or less, preferably 20% by mass or less, more preferably 15% by mass or less, based on the total mass of the composition.

The amount of (b) emulsifier in the composition according to the present invention is 1% by mass to 25% by mass, preferably 3% by mass to 20% by mass, and more preferably 5% by mass to 15% by mass, based on the total mass of the composition. It may be% by mass.

(water)
The composition according to the invention comprises (c) water.

The amount of (c) water in the composition according to the present invention is 50% by mass or more, preferably 60% by mass or more, and more preferably 70% by mass or more, based on the total mass of the composition.

The amount of (c) water in the composition according to the present invention may be 90% by mass or less, preferably 88% by mass or less, and more preferably 86% by mass or less, based on the total mass of the composition.

The amount of (c) water in the composition according to the present invention is 50% by mass to 90% by mass, preferably 60% by mass to 88% by mass, and more preferably 70% by mass to 86% by mass with respect to the total mass of the composition. It can be% by mass.

(alcohol)
The composition according to the invention may contain at least one alcohol.

The alcohol may be volatile or non-volatile.

The term "volatile" means that alcohol can evaporate at standard atmospheric pressure, such as 1 atm and room temperature, such as 25 ° C.

Alcohols include, for example, monohydric alcohols containing 2 to 6 carbon atoms, such as ethanol or isopropanol; in particular, containing 2 to 20 carbon atoms, preferably 2 to 10 carbon atoms. Preferredly polyols containing 2 to 8 carbon atoms such as glycerol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, caprylyl glycol, dipropylene glycol or diethylene glycol; glycol ethers (especially 3 to 16). (Contains 1 carbon atom), such as mono, di or tripropylene glycol (C _{1 to} C ₄ ) alkyl ethers, mono, di or triethylene glycol (C _{1 to} C ₄ ) alkyl ethers, and mixtures thereof. be able to.

The amount of alcohol in the composition according to the present invention may be 0.01% by mass or more, preferably 0.1% by mass or more, and more preferably 1% by mass or more, based on the total mass of the composition.

The amount of alcohol in the composition according to the present invention may be 30% by mass or less, preferably 20% by mass or less, and more preferably 10% by mass or less, based on the total mass of the composition.

The amount of oil in the composition according to the present invention is 0.01% by mass to 30% by mass, preferably 0.1% by mass to 20% by mass, more preferably 1% by mass to 10% by mass, based on the total mass of the composition. There may be.

(Cosmetological active ingredient)
The composition according to the present invention may contain at least one cosmetological active ingredient. Cosmetological active ingredients are not limited. Two or more kinds of beauty active ingredients may be used in combination. Therefore, a single type of cosmetological active ingredient or a combination of different types of cosmetological active ingredients can be used.

Among the beauty active ingredients used, UV shielding agents, antioxidants, cleansing agents, free radical traps, moisturizers, whitening agents, liporegulators, anti-wrinkle agents, anti-fake agents, anti-aging agents, Softeners, anti-wrinkle agents, keratolytic agents, anti-inflammatory agents, fresheners, healing agents, vasoprotectors, antibacterial agents, antifungal agents, antiperspirants, deodorants, skin conditioners, anesthetics, immunomodulators, nutritional agents, And a sebum absorber or a water absorber.

The cosmetological active ingredient may preferably be oil-soluble.

The composition according to the present invention contains the beauty active ingredient in an amount of 0.01% by mass to 25% by mass, preferably 0.1% by mass to 20% by mass, more preferably 1% by mass to 15% by mass, based on the total mass of the composition. More preferably, it may be contained in an amount of 2% by mass to 10% by mass.

(pH)
The pH of the dispersed phase of the composition according to the invention may be 3 to 9, preferably 3.5 to 8, more preferably 4 to 7.

The pH of the dispersed phase of the composition can be adjusted by adding at least one alkaline agent and / or at least one acid. The pH of the composition can also be adjusted by adding at least one buffer.

(Alkaline agent)
The composition according to the present invention may contain at least one alkaline agent. Two or more kinds of alkaline agents may be used in combination. Therefore, a single type of alkaline agent or a combination of different types of alkaline agents can be used.

The alkaline agent may be an inorganic alkaline agent. Inorganic alkaline agents consist of ammonia; alkali metal hydroxides; alkaline earth metal hydroxides; alkali metal phosphates and monohydrogenophosphates, such as sodium phosphate or sodium monohydrogen phosphate. It is preferably selected.

Examples of inorganic alkali metal hydroxides include sodium hydroxide and potassium hydroxide. Examples of alkaline earth metal hydroxides include calcium hydroxide and magnesium hydroxide. As the inorganic alkaline agent, sodium hydroxide is preferable.

The alkaline agent may be an organic alkaline agent. Organic alkaline agents include monoamines and their derivatives; diamines and their derivatives; polyamines and their derivatives; basic amino acids and their derivatives; basic amino acid oligomers and their derivatives; basic amino acid polymers and their derivatives; urea and its derivatives; It is preferably selected from the group consisting of guanidine and its derivatives.

Examples of organic alkaline agents include alkanolamines such as mono, di and triethanolamine, and isopropanolamines; urea, guanidine and derivatives thereof; basic amino acids such as lysine, ornithine or arginine; and diamines such as the structures below. ::

(In the formula, R represents an alkylene such as propylene optionally substituted with _{a hydroxyl or C 1 to} C _{4 alkyl group, and R 1} , R ₂ , R ₃ and R ₄ are independently hydrogen atoms. , there may be mentioned those described in an alkyl group or C ₁ -C ₄ hydroxyalkyl group), which can be exemplified by 1,3-propane diamine and derivatives thereof. Arginine, urea and monoethanolamine are preferred.

The alkaline agent is in a total amount of 0.001% by mass to 10% by mass, preferably 0.01% by mass to 5% by mass, more preferably 0.1% by mass to 1% by mass, based on the total mass of the composition, depending on its solubility. Can be used.

(acid)
The composition according to the invention may contain at least one acid. Two or more acids may be used in combination. Therefore, a single type of acid or a combination of different types of acids can be used.

The acid may include any inorganic or organic acid commonly used in cosmetics. Monovalent and / or polyvalent acids can be used. Monovalent acids such as citric acid, lactic acid, sulfuric acid, phosphoric acid and hydrochloric acid (HCl) can be used. HCl is preferred.

The acid is used in a total amount of 0.001% by mass to 10% by mass, preferably 0.01% by mass to 5% by mass, more preferably 0.1% by mass to 1% by mass, based on the total mass of the composition, depending on its solubility. can do.

(Buffer)
The composition according to the invention may contain at least one buffer. Two or more buffers may be used in combination. Therefore, a single type of buffer or a combination of different types of buffer can be used.

The buffers include acetate buffer (eg acetic acid + sodium acetate), phosphate buffer (eg sodium dihydrogen phosphate + disodium hydrogen phosphate), citric acid buffer (eg citric acid + sodium citrate). ), Borate buffer (eg, borate + sodium borate), tartrate buffer (eg, tartrate + sodium tartrate dihydrate), Tris buffer (eg, tris (hydroxymethyl) aminomethane), and Hepes. A buffer solution (4- (2-hydroxyethyl) -1-piperazine ethanesulfonic acid) can be mentioned.

(Optional additive)
In addition to the above-mentioned ingredients, the composition according to the present invention contains ingredients typically used in cosmetics, specifically, for example, dyes, powders, thickeners, polymers, silicones and silicone derivatives, and natural extracts derived from plants. Derivatives, waxes and the like may be contained within a range that does not impair the effects of the present invention.

In the composition according to the present invention, the above optional additives are added to the total mass of the composition in an amount of 0.01% by mass to 10% by mass, preferably 0.01% by mass to 5% by mass, and more preferably 0.1% by mass to 1. It may be contained in an amount of mass%.

The composition according to the present invention preferably contains 1% by mass or less of the thickener, more preferably 0.1% by mass or less of the thickener, and even more preferably no thickener.

(Preparation)
The composition according to the present invention
Of step (i),
(a) At least one oil and
(b) Mixing at least one emulsifier and
To prepare an isotropic phase by heating the mixture of the above components (a) and (b) to a temperature higher than the melting point of the mixture of the above components (a) and (b) in step (ii).
Slowly adding (c) water, which has the same temperature as the temperature in step (ii) of step (iii), to the isotropic phase while mixing,
Can be prepared by methods, including.

The mixing rate in step (iii) is important in preparing the emulsion because the addition of water increases the viscosity of the bulk. Excessively low mixing rates can lead to retention of water on the bulk surface and, in some cases, a polydisperse distribution of water droplets that can result in an unstable composition. On the other hand, an excessively high mixing rate may irreversibly destroy the high internal phase emulsion structure of the composition. Therefore, an appropriate mixing rate is recommended to obtain fine water droplets with a monodisperse distribution. In the present invention, a Rayneri mixer [TURBOTEST Type V2004] equipped with a rotor / stator homogenizer (blade diameter is 55 mm) supplied by VMI Linxis Group (France) is used for mixing in step (iii). You may. For example, in order to prepare 500 g of the composition according to the present invention, the mixing rate in step (iii) may be preferably maintained at 1500 rpm.

(form)
The composition according to the invention is in the form of a W / O emulsion. (a) oil and (b) emulsifier can form a continuous phase of the emulsion, and (c) water can form a dispersed phase of the emulsion.

The composition according to the present invention may be intended to be used as a cosmetic composition. Therefore, the cosmetic composition according to the present invention may be intended to be applied to a keratin substance. The keratin substance in the present specification means a material containing keratin as a main component, and examples thereof include skin, scalp, nails, lips, and hair. Therefore, the cosmetic compositions according to the invention are preferably used in cosmetic methods for keratin substances, especially the skin.

Therefore, the cosmetic composition according to the present invention may be a skin cosmetic composition, preferably a skin care composition or a skin make-up composition.

[Cosmetology method and use]
The present invention also relates to a cosmetic method, preferably a moisturizing method, for a keratin substance such as skin, which comprises the step of applying the composition according to the invention to the keratin substance.

The cosmetological method as used herein means a non-therapeutic cosmetological method for caring for and / or making up the surface of a keratin substrate such as skin.

The present invention also comprises the use of (a) at least one oil and (b) at least one emulsifier to prepare a stable W / O emulsion, wherein (a) the oil and (b) the emulsifier. The melting point of the mixture is between 5 ° C. and 50 ° C., and the amount of (c) water in the emulsion is 50% by mass or more, preferably 60% by mass or more, more preferably with respect to the total mass of the composition. Is over 70% by weight, with respect to use.

The above description of the components (a) to (c) for the compositions according to the invention may be applied to those components in the above use.

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

(Examples 1 to 3 and Comparative Example 1)
[Preparation]
Each composition according to Examples 1 to 3 and Comparative Example 1 was prepared by mixing the components shown in Table 1. All numerical values for the amount of ingredients are based on the "mass%" of the active ingredient.

[Evaluation]
(Melting point of mixture of emulsifier and oil)
The mixture of emulsifier and oil before blending with other ingredients was subjected to melting point analysis by DSC (Differential Scanning Calorimetry) using Hitachi X-DSC7000 under the following conditions:
Bread type: Alodine
Amount of mixture (analyzed): 10 mg
Protocol: heating cycle: 0 ° C to 80 ° C, cooling cycle: 80 ° C to -50 ° C, and heating / cooling rate: 5 ° C / min

If the mixture was not liquid at the starting temperature, the mixture was heated. The temperature read at the peak of the melting curve (during heating) was considered to be the melting point of the mixture.

If the mixture was liquid at the starting temperature, the mixture was cooled. The temperature read at the first freezing point was considered to be the melting point of the mixture.

The results are shown in Table 1.

(Stability)
Each composition according to Examples 1-3 and Comparative Example 1 in the form of a W / O emulsion was stored in a clear glass container at room temperature for at least 1 week. The stability of the composition was visually observed and evaluated according to the following criteria.

Stable: Emulsion uniformity was maintained.
Unstable: Emulsion uniformity was not maintained.

The results are shown in Table 1.

(Example 4 and Comparative Example 2)
[Preparation]
Each composition according to Example 4 and Comparative Example 2 was prepared by mixing the components shown in Table 2. All numerical values for the amount of ingredients are based on the "mass%" of the active ingredient.

[Evaluation]
(Melting point of mixture of emulsifier and oil)
The mixture of emulsifier and oil before blending with other ingredients was subjected to melting point analysis by DSC using Hitachi X-DSC7000 under the following conditions:
Bread type: Alodine
Amount of mixture (analyzed): 10 g
Protocol: heating cycle: 0 ° C to 80 ° C, cooling cycle: 80 ° C to -50 ° C, and heating / cooling rate: 5 ° C / min

If the mixture was not liquid at the starting temperature, the mixture was heated. The temperature read at the peak of the melting curve (during heating) was considered to be the melting point of the mixture.

If the mixture was liquid at the starting temperature, the mixture was cooled. The temperature read at the first freezing point was considered to be the melting point of the mixture.

The results are shown in Table 2.

(Stability)
Each composition according to Example 4 and Comparative Example 2 in the form of a W / O emulsion was stored in a transparent container at 4 ° C., 25 ° C. and 45 ° C. for 1 week. The stability of the composition was visually observed and evaluated according to the following criteria.

Stable: Emulsion uniformity was maintained.
Unstable: Emulsion uniformity was not maintained.

The results are shown in Table 2.

Claims (15)

A composition in the form of a W / O emulsion,
(a) At least one oil and
(b) At least one emulsifier and
(c) Including water
The melting point of the mixture of the oil (a) and the emulsifier (b) is between 5 ° C and 50 ° C.
A composition in which the amount of water (c) in the composition is 50% by mass or more, preferably 60% by mass or more, more preferably 70% by mass or more, based on the total mass of the composition. The composition comprises a continuous phase and a dispersed phase.
The continuous phase comprises the oil (a) and the emulsifier (b).
The composition according to claim 1, wherein the dispersed phase contains (c) water. The composition according to claim 1 or 2, wherein the Hansen solubility parameter of the oil (a) ^{is 13.5 to 18 MPa 0.5} , preferably 14.0 to 17.5 MPa ^0.5 , and more preferably 14.5 to 17 MPa ^0.5. The composition according to any one of claims 1 to 3, wherein the oil (a) is selected from the group consisting of hydrocarbon oils, vegetable oils, and mixtures thereof. The composition according to any one of claims 1 to 4, wherein the oil (a) is selected from the group consisting of dodecane, hemisqualene, squalane, coconut oil, and mixtures thereof. The amount of the oil (a) in the composition is 1% by mass to 25% by mass, preferably 3% by mass to 20% by mass, and more preferably 5% by mass to 15% by mass with respect to the total mass of the composition. The composition according to any one of claims 1 to 5, which is by mass%. The composition according to any one of claims 1 to 6, wherein the HLB value of the emulsifier (b) is more than 1.7 and less than 7, preferably more than 2.0 and less than 6.5, and more preferably more than 3.0 and less than 6.0. The composition according to any one of claims 1 to 7, wherein the emulsifier (b) is selected from the group consisting of anionic, cationic, amphoteric, nonionic surfactants, and mixtures thereof. The emulsifier (b) is selected from the group consisting of lecithin, glycol distearate, sorbitan sesquioleate, sorbitan trioleate, steares-2, coconut oil fatty acid PEG-7 glyceryl, and mixtures thereof. The composition according to any one of 8 to 8. The composition contains the first and second emulsifiers as the (b) emulsifier.
The first emulsifier has a melting point of less than 5 ° C.
The composition according to any one of claims 1 to 9, wherein the second emulsifier has a melting point of more than 30 ° C. The amount of the emulsifier (b) in the composition is 1% by mass to 25% by mass, preferably 3% by mass to 20% by mass, and more preferably 5% by mass to 15% by mass with respect to the total mass of the composition. The composition according to any one of claims 1 to 10, which is by mass%. The composition according to any one of claims 1 to 11, which comprises at least one alcohol. The composition according to any one of claims 1 to 12, which contains 1% by mass or less of a thickener, preferably 0.1% by mass or less of a thickener, and more preferably contains no thickener. The composition according to any one of claims 1 to 13, which is a cosmetic composition, preferably a skin cosmetic composition. A method comprising a step of applying the composition according to any one of claims 1 to 14 to the keratin substance, which is a beauty method for a keratin substance such as skin, preferably a moisturizing method.