WO2020066895A1 - Skin cosmetic composition - Google Patents

Abstract

Provided is a skin cosmetic composition capable of including a comparatively large amount of oil and having excellent transparency and storage stability. The skin cosmetic composition contains a component A, a component B, a component C, a component D, a component E, a component F, a component G, and a component H. The mass ratio (B/A) of component B to component A is 5.5–18.0. Component A is a phospholipid; component B is a polyoxyethylene sterol ether having an average of 15–50 oxyethylene moles added thereto and/or a polyoxyethylene stanol ether having an average of 15–50 oxyethylene moles added thereto; component C is a C12–24 monovalent aliphatic alcohol having a branched chain; component D is at least one type of polyvalent alcohol selected from the group consisting of propylene glycol, dipropylene glycol, and 1, 3–butylene glycol; component E is water; component F is a sterol; component G is an oil; and component H is a polyoxyethylene hydrogenated castor oil having an average of 5–30 oxyethylene moles added thereto.

Description

Composition for skin cosmetics

The present invention relates to a composition for skin cosmetics. More specifically, the present invention relates to an aqueous skin cosmetic composition containing an oil component.

Conventionally, there is an emollient effect such as prevention of transpiration of skin moisture and softening of keratin, and it contributes to moisturizing properties. Therefore, it has been attempted to incorporate oil into water-based cosmetics. As a technique for blending an oil component that is hardly soluble in water with an aqueous cosmetic, a technique of solubilizing micelles (for example, Patent Document 1) and a technique using liposomes (closed endoplasmic reticulum) as a carrier (for example, Patent Document 2) Etc. are known.

Japanese Patent Application Laid-Open No. H11-262563 JP-A-5-286824

However, it was extremely difficult to prepare a transparent water-based cosmetic containing an amount of oil sufficient to exert an emollient effect. For example, when micelles are formed from nonionic surfactants, the size of the micelles is usually very small, typically about 10 to 20 nm, and there is not enough space to take in oils in the micelles, and the amount of oils that can be blended is limited. . For this reason, although a water-based cosmetic having a transparent appearance can be obtained, it cannot be said that a sufficient emollient effect can be obtained.

There is also a problem with the technology of blending oil with liposomes. Liposomes have a size on the order of 100 nm, are larger than micelles, and can contain more oil in the liposome membrane. However, the transparency is reduced depending on the particle size of the liposome, and particularly when it is blended in a low-viscosity lotion formulation, the storage stability is poor.

Accordingly, an object of the present invention is to provide a skin cosmetic composition which can contain a relatively large amount of oil and is excellent in transparency and storage stability.

The present inventors have conducted intensive studies to achieve the above object, and as a result, have found that phospholipids, a specific polyoxyethylene sterol ether and / or a specific polyoxyethylene stanol ether, a specific aliphatic alcohol, and a specific polyoxyethylene sterol ether. A polyhydric alcohol, water, a sterol, an oil component, a specific polyoxyethylene hydrogenated castor oil, and a phospholipid, a specific polyoxyethylene sterol ether and / or a specific polyoxyethylene stanol ether having a specific mass. It has been found that according to a water-based skin cosmetic composition having a relative ratio, a skin cosmetic composition which can contain a relatively large amount of oil and has excellent transparency and storage stability can be obtained. The present invention has been completed based on these findings.

That is, the present invention comprises the following component A, the following component B, the following component C, the following component D, the following component E, the following component F, the following component G, and the following component H, Provided is a skin cosmetic composition having a mass ratio (B / A) of the component B to the component A of 5.5 to 18.0.
Component A: Phospholipid Component B: Polyoxyethylene sterol ether having an average addition mole number of oxyethylene of 15 to 50 and / or polyoxyethylene stanol ether having an average addition mole number of oxyethylene of 15 to 50 Component C: Branched chain Component D: one or more polyhydric alcohols selected from the group consisting of propylene glycol, dipropylene glycol, and 1,3-butylene glycol Component E: water Component F: Sterol Component G: Oil Component H: Polyoxyethylene hydrogenated castor oil having an average added mole number of oxyethylene of 5 to 30

The composition for skin cosmetics preferably further contains the following component I: Component I: glycerin mono-2-ethylhexyl ether

The above-mentioned composition for skin cosmetics preferably further contains the following component J.
Component J: 1,2-alkanediol having 5 to 10 carbon atoms

According to the skin cosmetic composition of the present invention, it is possible to provide a skin cosmetic composition which can contain a relatively large amount of oil and is excellent in transparency and storage stability.

The composition for skin cosmetics of the present invention comprises a phospholipid; polyoxyethylene sterol ether having an average addition mole number of oxyethylene of 15 to 50 and / or polyoxyethylene stanol having an average addition mole number of oxyethylene of 15 to 50. Ether; a monovalent aliphatic alcohol having 12 to 24 carbon atoms having a branched chain; at least one polyhydric alcohol selected from the group consisting of propylene glycol, dipropylene glycol and 1,3-butylene glycol; water; sterol; Oil component containing at least polyoxyethylene hydrogenated castor oil having an average addition mole number of oxyethylene of 5 to 30. In the present specification, the phospholipid is referred to as “Component A”, the polyoxyethylene sterol ether having an average addition mole number of oxyethylene of 15 to 50 and / or the polyoxyethylene oxyethylene having an average addition mole number of oxyethylene of 15 to 50. The stanol ether is selected from the group consisting of "Component B", and the branched chain monovalent aliphatic alcohol having 12 to 24 carbon atoms is selected from the group consisting of "Component C", propylene glycol, dipropylene glycol and 1,3-butylene glycol. One or more polyhydric alcohols are "Component D", water is "Component E", sterol is "Component F", oil is "Component G", and polyoxyethylene cured castor having an average added mole number of oxyethylene of 5 to 30 is used. The oils are sometimes referred to as "Component H" respectively.

皮膚 The skin cosmetic composition of the present invention preferably further contains glycerin mono-2-ethylhexyl ether. Further, the composition for skin cosmetics of the present invention preferably further contains a 1,2-alkanediol having 5 to 10 carbon atoms. In the present specification, the glycerin mono-2-ethylhexyl ether may be referred to as “component I” in some cases. Further, the 1,2-alkanediol having 5 to 10 carbon atoms may be referred to as “component J” in some cases.

That is, the composition for skin cosmetics of the present invention contains at least component A, component B, component C, component D, component E, component F, component G, and component H. The skin cosmetic composition of the present invention may further contain component I and / or component J. Further, the composition for skin cosmetics of the present invention may contain components other than the above components A to J. Further, each component contained in the skin cosmetic composition of the present invention, for example, component A, component B, component C, component D, component E, component F, component G, component H, component I, component J, and Each component such as other components may be used alone or in combination of two or more.

[Component A]
Component A is a "phospholipid". Component A forms a bicellular structure (a disk-shaped lipid bilayer composed of phospholipids), which is a form of micelle. Therefore, a relatively large amount of oil can be included in the bicell structure.

Component A is a complex lipid containing a phosphate residue, such as a natural phospholipid, a synthetic phospholipid, or a hydrogenated phospholipid in which the unsaturated carbon chain of a naturally occurring phospholipid is saturated with hydrogen. Examples of the phospholipid include natural phospholipids such as phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylinositol, lysophosphatidylcholine, sphingomyelin, egg yolk lecithin, soybean lecithin; Synthetic phospholipids such as stearoyl phosphatidylcholine, dioleoyl phosphatidylcholine, palmitoyl oleoyl phosphatidylcholine; hydrogenated phospholipids such as hydrogenated soybean lecithin, hydrogenated egg yolk lecithin, hydrogenated phosphatidylcholine, hydrogenated phosphatidylserine, and the like. Among them, hydrogenated phospholipids are preferred, and hydrogenated soybean lecithin is more preferred, from the viewpoint of excellent storage stability. As the component A, only one type may be used, or two or more types may be used.

市 販 As the component A, a commercially available product can be used. Commercial products of hydrogenated soybean lecithin include, for example, trade name "COATSOME @ NC-21", trade name "COATSOME @ NC-61" (both manufactured by NOF Corporation), trade name "NIKKOL @ resinol S-10EX", trade name The trade name is "NIKKOL @ Resinol S-10E", the trade name "NIKKOL @ Resinol S-10M" (above, manufactured by Nikko Chemicals Co., Ltd.), and the trade name is "Basis @ LS-60HR" (manufactured by Nisshin Oillio Group Co., Ltd.).

The content ratio of the component A in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.005% by mass or more based on 100% by mass of the total amount of the skin cosmetic composition of the present invention. It is more preferably at least 0.1% by mass, further preferably at least 0.2% by mass. When the content is 0.005% by mass or more, a bicell structure is formed, the component F is stably dispersed, and the storage stability is further improved. The upper limit of the content is preferably 3.0% by mass or less, more preferably 2.0% by mass or less, and even more preferably 1.5% by mass or less. When the content is 3.0% by mass or less, an excessive increase in viscosity can be suppressed, and the dispersibility can be further improved. The content ratio of the component A is the sum of the content ratios of all the components A in the skin cosmetic composition of the present invention.

[Component B]
Component B is "polyoxyethylene sterol ether having an average addition mole number of oxyethylene of 15 to 50 and / or polyoxyethylene stanol ether having an average addition mole number of oxyethylene of 15 to 50". That is, the component B is one or both of the polyoxyethylene sterol ether and the polyoxyethylene stanol ether. Component B has a high affinity for component A and forms a bilayer with component A. Further, it is presumed that the curvature of the bilayer film is adjusted, thereby contributing to stabilization of the bicell structure. As component B, polyoxyethylene stanol ether is more preferred from the viewpoint of excellent oxidation stability.

The polyoxyethylene sterol ether or polyoxyethylene stanol ether is obtained by adding oxyethylene to sterol or stanol. The average number of moles of oxyethylene to be added to sterol or stanol is 15 to 50, preferably 20 to 30.

Component B includes, for example, polyoxyethylene phytosterol ether, polyoxyethylene phytostanol ether, polyoxyethylene cholesterol ether, polyoxyethylene cholestanol ether and the like. Among them, vegetable polyoxyethylene phytosterol ether and polyoxyethylene phytostanol ether are preferred. As the component B, only one type may be used, or two or more types may be used.

市 販 As the component B, a commercially available product may be used. Examples of commercially available products of Component B include “NIKKOL @ BPS-20”, trade name “NIKKOL @ BPS-30”, and trade name “NIKKOL @ BPSH-25” (all manufactured by Nikko Chemicals Co., Ltd.).

The content ratio of the component B in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.03% by mass or more based on 100% by mass of the total amount of the skin cosmetic composition of the present invention, It is more preferably at least 1.0% by mass. When the content is 0.03% by mass or more, it sufficiently contributes to stabilization of the bicell structure, and is further excellent in transparency and storage stability. The upper limit of the content ratio is preferably 15.0% by mass or less, and more preferably 10.0% by mass or less. When the content ratio is 15.0% by mass or less, an excessive increase in viscosity can be suppressed, and the dispersibility can be further improved. The content ratio of the component B is the sum of the content ratios of all the component B in the skin cosmetic composition of the present invention.

質量 The mass ratio (B / A) of the component B to the component A in the skin cosmetic composition of the present invention is 5.5 or more, preferably 6.0 or more, more preferably 7.0 or more. Further, the mass ratio (B / A) is 18.0 or less, preferably 15.0 or less, more preferably 12.0 or less. When the mass ratio (B / A) is within the above range, transparency and storage stability are more excellent.

[Component C]
Component C is “a monovalent aliphatic alcohol having a branched chain and having 12 to 24 carbon atoms”. It is presumed that the use of Component C softens the lipid bilayer membrane and contributes to stabilization.

Component C includes, for example, octyldodecanol, decyltetradecanol, isostearyl alcohol and the like. Among them, octyldodecanol and decyltetradecanol are preferred from the viewpoint of improving storage stability. As the component C, only one type may be used, or two or more types may be used.

The content ratio of the component C in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.005% by mass or more based on 100% by mass of the total amount of the skin cosmetic composition of the present invention. It is more preferably at least 0.05% by mass, and even more preferably at least 0.1% by mass. When the content is 0.005% by mass or more, the storage stability is further improved. The upper limit of the content ratio is preferably 0.5% by mass or less, more preferably 0.4% by mass or less. When the content is 0.5% by mass or less, the transparency is further improved. The content ratio of the component C is the sum of the content ratios of all the components C in the skin cosmetic composition of the present invention.

The mass ratio (C / A) of the component C to the component A in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.05 or more, more preferably 0.1 or more, and still more preferably. 0.15 or more. When the mass ratio (C / A) is 0.05 or more, the storage stability is further improved. The upper limit of the mass ratio (C / A) is preferably 1.0 or less, more preferably 0.7 or less, and even more preferably 0.5 or less. When the mass ratio (C / A) is 1.0 or less, transparency is further improved.

[Component D]
Component D is "one or more polyhydric alcohols selected from the group consisting of propylene glycol, dipropylene glycol and 1,3-butylene glycol". Component D functions as a solvent for other components during production of the skin cosmetic composition. In particular, by using the specified three components of the component D, an increase in the viscosity of the dispersion when other components are dispersed is suppressed, and the dispersibility is improved. As the component D, only one type may be used, or two or more types may be used.

The content ratio of the component D in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.25% by mass or more based on 100% by mass of the total amount of the skin cosmetic composition of the present invention. It is more preferably at least 3.0% by mass, and even more preferably at least 5.0% by mass. The upper limit of the content is preferably 30.0% by mass or less, more preferably 25.0% by mass or less, and still more preferably 15.0% by mass or less. When the content is in the above range, transparency and storage stability are further improved. The content ratio of the component D is the sum of the content ratios of all the components D in the skin cosmetic composition of the present invention.

質量 The mass ratio (D / A) of the component D to the component A in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 8.0 or more, more preferably 10.0 or more. The upper limit of the mass ratio (D / A) is preferably 60.0 or less, more preferably 30.0 or less, and even more preferably 20.0 or less. When the mass ratio (D / A) is within the above range, the composition for skin cosmetics is more excellent in preventing cloudiness.

[Component E]
Component E is "water". By using water, freshness and freshness can be imparted to the skin cosmetic composition of the present invention, and further the skin cosmetic composition of the present invention is applied to skin cosmetics such as aqueous lotions. be able to.

The content ratio of the component E in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 55.0% by mass or more based on 100% by mass of the total amount of the skin cosmetic composition of the present invention. It is more preferably at least 60.0% by mass, still more preferably at least 65.0% by mass. The content is preferably 95.0% by mass or less, more preferably 90.0% by mass or less, and still more preferably 85.0% by mass or less. It is preferable that the compounding ratio be within the above range, since simplicity and a refreshing feeling upon application to an aqueous lotion can be obtained.

[Component F]
Component F is a "sterol". Component F is presumed to adjust the curvature of the bilayer and thereby contribute to the stabilization of the bicell structure. In addition, it is also blended as an active ingredient for improving skin barrier function and the like.

The component F includes, for example, animal sterol, plant sterol (phytosterol) and the like. Animal sterols include, for example, cholesterol, cholestanol, 7-dehydrocholesterol and the like. Examples of the plant sterol include sitosterol, stigmasterol, fucosterol, spinasterol, and brassicasterol. As the component F, only one type may be used, or two or more types may be used.

市 販 As the component F, a commercially available product can be used. Examples of commercial products of Component F include, for example, trade name “Cholesterol JSQI”, trade name “Cholesterol of Japanese Pharmacopoeia” (all manufactured by Nippon Seika Co., Ltd.), and trade name “phytosterol” (manufactured by Eisai Food Chemical Co., Ltd.) And the trade name "Phytosterol-SKP" (manufactured by Tama Seikagaku Co., Ltd.).

The content ratio of the component F in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.01% by mass or more based on 100% by mass of the total amount of the skin cosmetic composition of the present invention, It is more preferably at least 0.1% by mass, further preferably at least 0.2% by mass. When the content is 0.01% by mass or more, a barrier function or the like can be imparted to the skin. The upper limit of the content is preferably 2.0% by mass or less, more preferably 1.0% by mass or less, and even more preferably 0.6% by mass or less. When the mass ratio is 2.0% by mass or less, the storage stability is further improved. The content ratio of the component F is the sum of the content ratios of all the components F in the skin cosmetic composition of the present invention.

[Component G]
Component G is “oil”. Component G includes, for example, vegetable oil, ester oil, silicone oil, hydrocarbon oil, wax, higher fatty acid, higher alcohol other than component C, and the like. Component G is used as an emollient component in the skin cosmetic composition of the present invention, for example, to prevent evaporation of skin moisture and to soften keratin. The component G does not include the component F. As the component G, only one type may be used, or two or more types may be used.

Examples of the vegetable oil include macadamia nut oil, eucalyptus oil, coconut oil, avocado oil, safflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, shea butter (shea butter), cocoa butter, almond oil, and sunflower oil. , Rose hip oil, olive squalane, camelia oil, kiwi fruit seed oil, camellia oil, apricot kernel oil, sesame oil, soybean oil, jojoba oil, castor oil, hazelnut oil, meadowfoam oil, peppermint oil, argan oil, carrot oil, lavender Oil, sugar squalane, damask rose flower wax, centifolia rose flower wax, scotch flower wax, camellia oil, hydrogenated products thereof (for example, hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated avocado oil, Hydrogenated soybean oil and the like).

Examples of the ester oil include ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, 2-ethylhexyl palmitate, octyl dodecyl myristate, isopropyl isostearate, propylene glycol isostearate, and propylene glycol isostearate. Cetyl ethylhexanoate, glyceryl tri-2-ethylhexanoate, glyceryl tri (caprylate / caprate), isononyl isononanoate, diisopropyl adipate, pentaerythrityl tetraoctanoate, pentaerythrityl tetraisostearate, diisostearyl malate , Erythrityl triethylhexanoate, 2-ethylhexyl hydroxystearate, hexa (hydroxystearic acid / stearic acid / rosin) ) Dipentaerythrityl, tetra (hydroxystearic acid / isostearic acid) dipentaerythrityl, hexahydroxystearic acid dipentaerythrityl, (ethylhexanoic acid / stearic acid / adipate) glyceryl, tri (caprylic / capric / myristic / stearic) glyceryl, hexa (Behenic acid / benzoic acid / ethylhexanoic acid) dipentaerythrityl, alkyl benzoate (C12-15) and the like.

Examples of the silicone oil include, but are not particularly limited to, dimethyl silicone oil such as methylpolysiloxane and highly polymerized methylpolysiloxane; methylphenyl silicone oil such as methylphenylpolysiloxane; methylcyclopolysiloxane, octamethylcyclotetrasiloxane; Cyclic silicone oils such as decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane; aminopropylmethylsiloxane / dimethylsiloxane copolymer, aminoethylaminopropylsiloxane / dimethylsiloxane copolymer, aminoethylaminopropylmethylsiloxane / dimethylsiloxane Amino-modified silicone, carboxy-modified silicone, fatty acid-modified silicone, alcohol-modified silicone, aliphatic alcohol-modified silicone such as polymers Emissions, epoxy-modified silicone, fluorine-modified silicones, modified silicones and alkyl-modified silicones; methylhydrogenpolysiloxane, dimethiconol, and the like.

Examples of the hydrocarbon oil include α-olefin oligomer, petrolatum, isoparaffin, light isoparaffin, light liquid isoparaffin, squalane, synthetic squalane, vegetable squalane, liquid isoparaffin, liquid paraffin, hydrogenated polyisobutene, hydrogenated (tetradecenyl / Methylpentadecene), isododecane and the like.

Examples of the wax include carnauba wax, candelilla wax, beeswax, rice bran wax, shellac wax, whale wax, lanolin, sunflower seed wax and the like.

Examples of the higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, and oleic acid.

高級 Examples of higher alcohols other than the above-mentioned component C include cetyl alcohol, stearyl alcohol, myristyl alcohol, oleyl alcohol and the like.

Among them, component G preferably contains a highly polar oil component. Further, the highly polar oil component more preferably has a sterol skeleton. When a highly polar oil component is contained as the component G, the emollient effect is further improved. As the highly polar oil, only one kind may be used, or two or more kinds may be used.

As the highly polar oil component, any of plant-derived, animal-derived, and mineral-derived oils can be used. Examples of polar fats and oils include hydrogenated palm oil, hydrogenated jojoba oil, shea butter, (adipic acid / 2-ethylhexanoic acid / stearic acid) glyceryl oligoester, macadamia nut oil fatty acid phytosteryl, glyceryl tricaprylate, glyceryl tricaprate, Glyceryl trimyristate, glyceryl tristearate, phytosteryl oleate, dipentaerythrityl hydroxystearate, dipentaerythrityl stearate, dipentaerythrityl rosinate, dipentaerythrityl hexahydroxystearate, and the like. Phytosteryl oleate is preferred from the viewpoint of further enhancing the emollient effect of the skin cosmetic composition of the present invention.

The content ratio of the component G in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.01% by mass or more based on 100% by mass of the total amount of the skin cosmetic composition of the present invention. More preferably, it is 0.05% by mass or more. When the content is 0.01% by mass or more, emollient effects such as moisturizing and keratin softening are further exhibited. The content is preferably 0.3% by mass or less, more preferably 0.2% by mass or less. When the content is 0.3% by mass or less, the storage stability is further improved. The content ratio of the component G is the sum of the content ratios of all the components G in the skin cosmetic composition of the present invention.

The mass ratio (G / A) of the component G to the component A in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.01 or more, more preferably 0.02, and still more preferably. Is 0.05 or more. The mass ratio (G / A) is preferably 1.0 or less, more preferably 0.8 or less, and even more preferably 0.5 or less. When the mass ratio (G / A) is within the above range, the storage stability is more excellent.

[Component H]
Component H is "polyoxyethylene hydrogenated castor oil having an average addition mole number of oxyethylene of 5 to 30". Component H is presumed to adjust the curvature of the bilayer in the skin cosmetic composition of the present invention, thereby contributing to stabilization of the bicell structure. In particular, it exerts an effect of stably confining the component G in the film and improving storage stability. As the component H, only one type may be used, or two or more types may be used.

平均 The average number of moles of oxyethylene added as the component H is 5 to 30. The average number of moles added is preferably 10 or more, more preferably 15 or more, and preferably 25 or less. When the average number of added moles of oxyethylene of the component H is within the above-mentioned preferred range, the oil component is more stably confined in the bicell, and the effect of increasing the storage stability is further exhibited. Among them, the component H is most preferably a polyoxyethylene hydrogenated castor oil having an average addition number of oxyethylene of 20.

The HLB (Hydrophil-Lipophile Balance) value of the component H is not particularly limited, but is, for example, 6.0 to 11.0, and preferably 6.5 to 10.5. Use of the component H having an HLB value in the above range contributes to storage stability. The more the HLB value of the component H indicates lipophilicity, the better the storage stability. Note that the HLB value can be calculated by the Griffin method.

The content ratio of the component H in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.05% by mass or more based on 100% by mass of the total amount of the skin cosmetic composition of the present invention. It is more preferably at least 0.5% by mass. The content is preferably 5.0% by mass or less, more preferably 3.0% by mass or less, and further preferably 2.0% by mass or less. When the content is within the above range, the effect of stably confining the component G in the lipid bilayer membrane is more excellent. The content ratio of the component H is the sum of the content ratios of all the component Hs in the skin cosmetic composition of the present invention.

[Component I]
Component I is "glycerin mono 2-ethylhexyl ether" (also referred to as "octoxyglycerin"). When component I is contained, it is presumed that flexibility is imparted to the membrane shape because it penetrates into the bicellular lipid bilayer membrane. For this reason, the composition for skin cosmetics of the present invention further improves transparency and storage stability.

When the skin cosmetic composition of the present invention contains Component I, the content ratio of Component I in the skin cosmetic composition of the present invention is not particularly limited. The amount is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and still more preferably 0.1% by mass or more, based on the total amount of 100% by mass. When the content is 0.01% by mass or more, transparency and storage stability are more excellent. The upper limit of the content ratio is preferably 2.0% by mass or less, more preferably 1.5% by mass or less, and further preferably 1.0% by mass or less. (4) When the content is 2.0% by mass or less, a less irritating agent can be obtained.

[Component J]
Component J is "1,2-alkanediol having 5 to 10 carbon atoms". When component J is contained, it is presumed that flexibility is imparted to the membrane shape because it enters the bilayer lipid bilayer membrane. For this reason, the composition for skin cosmetics of the present invention further improves transparency and storage stability.

As the component J, for example, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol and the like can be mentioned. As the component J, only one type may be used, or two or more types may be used.

When the skin cosmetic composition of the present invention contains the component J, the content ratio of the component J in the skin cosmetic composition of the present invention is not particularly limited. The amount is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and still more preferably 0.2% by mass or more based on the total amount of 100% by mass. When the content is 0.01% by mass or more, transparency and storage stability are more excellent. The upper limit of the content is preferably 2.0% by mass or less, more preferably 1.0% by mass or less, and even more preferably 0.7% by mass or less. When the content is 2.0% by mass or less, a more irritating agent can be obtained. The content ratio of the component J is the sum of the content ratios of all the components J in the skin cosmetic composition of the present invention.

[Other ingredients]
The skin cosmetic composition of the present invention may further contain other components other than the above components A to J. The other components are not particularly limited, but include, for example, surfactants other than component H (cationic surfactant, anionic surfactant, nonionic surfactant, amphoteric surfactant, etc.), lower alcohols, other than component C Higher alcohols, polyhydric alcohols other than component D, ultraviolet absorbers, powders, antioxidants, preservatives, fragrances, coloring agents, chelating agents, cooling agents, thickeners, vitamins, neutralizing agents, amino acids, Additives such as pH adjusters, whitening agents, anti-inflammatory agents, deodorants, plant and animal extracts, sequestering agents, and the like. As the other components, only one kind may be used, or two or more kinds may be used.

外 観 The skin cosmetic composition of the present invention preferably has a transparent appearance from the viewpoint of aesthetics. Further, the high transparency of the composition for skin cosmetics of the present invention means that the incorporated oil does not agglomerate or cream, and indicates that the composition is in a very stable state. For this reason, the transparency of the skin cosmetic composition of the present invention also serves as an index of storage stability.

成分 In the skin cosmetic composition of the present invention, component A (phospholipid) forms a bicellular structure which is a form of micelle. The bicell structure is a disk-shaped lipid bilayer composed of phospholipids. The bicellular structure in the skin cosmetic composition of the present invention has a particle size of about 20 to 50 nm, which is between micelles and liposomes. In the bicell structure, since an oil component can be compounded in the lipid bilayer membrane, a larger amount of oil component can be compounded than a micelle. In addition, since it does not have the particle size of liposomes, it has excellent storage stability. Further, with the bicell structure, transparency is not impaired.

か ら Further, for the above reasons, the skin cosmetic composition of the present invention is preferably a skin cosmetic composition that does not contain liposomes formed from phospholipids.

ＰＨ The pH of the skin cosmetic composition of the present invention is not particularly limited, but is preferably, for example, 5.0 to 8.0 at 25 ° C.

The viscosity of the composition for skin cosmetics of the present invention is not particularly limited. For example, the viscosity at 25 ° C. is preferably 0.5 to 1000 mPa · s, and more preferably 0.5 to 500 mPa · s. More preferred. The viscosity is measured at a rotational speed of 60 r / min by using a B-type viscometer, selecting a rotor suitable for the viscosity.

平均 The average particle size of the bicell structure of the skin cosmetic composition of the present invention is not particularly limited, but is preferably 20 nm or more, more preferably 30 nm or more, and further preferably 40 nm or more. When the lower limit of the average particle diameter is 20 nm or more, a space for incorporating the component G in the bicell structure can be secured. The upper limit of the average particle diameter is preferably 100 nm or less, more preferably 90 nm or less, and still more preferably 80 nm or less. When the upper limit of the average particle diameter is 100 nm or less, the storage stability and the transparency are more excellent.

The above average particle diameter (nm) can be measured using a dynamic light scattering photometer or a transmission electron microscope (TEM).

皮膚 In order to prepare the skin cosmetic composition of the present invention, the composition can be produced by mixing the above-mentioned components and stirring with a known method, for example, using a homomixer.

皮膚 Further, by mixing the composition for skin cosmetics of the present invention with components used in skin cosmetics, skin cosmetics such as lotion can be produced. That is, the composition for skin cosmetics of the present invention can be used as a raw material (so-called intermediate raw material) used in the production of skin cosmetics. By using the composition for skin cosmetics of the present invention, the composition can be stably dispersed in an aqueous or low-viscosity dispersion medium, so that the component G can be incorporated into the skin cosmetics. Moreover, the composition for skin cosmetics of the present invention can be used as a skin cosmetic as such.

In the present invention, a skin cosmetic containing the above-described composition for skin cosmetic of the present invention is obtained. In addition, in this specification, the above-mentioned "skin cosmetic containing the composition for skin cosmetics of the present invention" may be referred to as "skin cosmetic of the present invention". The content of the skin cosmetic composition of the present invention in 100% by mass of the skin cosmetic of the present invention is not particularly limited, but is preferably 0.1 to 100% by mass, more preferably 0.5 to 10.0%. % By mass.

The dosage form of the composition for skin cosmetics (or skin cosmetics) of the present invention is not particularly limited, and examples thereof include lotions (creams), gels, emulsions, aerosol sprays, natural sprays, sticks, powders, and the like. Various dosage forms such as roll-on, sheet (paper) and the like can be mentioned. Among them, lotions (lotions), creams, gels and emulsions are preferable, and lotions (lotions) are more preferable.

Examples of the skin cosmetic composition (or skin cosmetic) of the present invention are not particularly limited, and include, for example, moisturizing cosmetics, whitening cosmetics, acne care cosmetics, and anti-aging cosmetics (eg, wrinkle suppression, sagging suppression) Skin care cosmetics (for the purpose of, etc.); scalp care cosmetics (for the purpose of moisturizing, suppressing sebum, etc.); deodorant cosmetics; sunscreen cosmetics; shaving cosmetics; Body shampoo, bar soap, etc.) Among them, the skin cosmetic composition (or skin cosmetic) of the present invention is preferably a skin care cosmetic or a scalp care cosmetic, and more preferably a skin care cosmetic. The skin cosmetic composition (or skin cosmetic) of the present invention may be, for example, any of cosmetics, quasi-drugs, pharmaceuticals, and miscellaneous goods.

The site to which the skin cosmetic composition (or skin cosmetic) of the present invention is applied is not particularly limited, and may include a face (for example, forehead, eyes, eyes, cheeks, mouth, etc.), arm, elbow, back of hand, fingertip. , Feet, knees, heels, neck, sides, back, scalp and the like.

The composition for skin cosmetics of the present invention is a skin cosmetic composition containing water (component E) as a medium, wherein the average addition mole number of phospholipid (component A) and oxyethylene is 15 to 50. Polyoxyethylene stanol ether having an average addition mole number of ether and / or oxyethylene of 15 to 50 (component B), a monovalent aliphatic alcohol having a branched chain having 12 to 24 carbon atoms (component C), propylene glycol, One or more polyhydric alcohols selected from the group consisting of dipropylene glycol and 1,3-butylene glycol (component D), sterols (component F), oils (component G), and an average number of moles of added oxyethylene of 5 to 5 Contains 30 polyoxyethylene hydrogenated castor oil (Component H). The bicellular structure in the skin cosmetic composition of the present invention is composed of component B, component C, component F, component G, and component H, with component A as the center. Component D functions as a solvent for other components during production. Although the role of each of the above components has not been completely elucidated, it is assumed that component B, component F, and component H adjust the curvature of the lipid bilayer, and component C contributes to the flexibility of the lipid bilayer. It is presumed that the stability of the bicell structure is particularly improved. In general, blending of component G tends to destabilize the bicell structure, but in the present invention, in particular, by including component H as a component of the lipid bilayer, the bicomponent structure can be contained in the lipid bilayer. The feature is that G can be stably compounded.
The bicellular structure in the skin cosmetic composition of the present invention has a particle size of about 20 to 50 nm, which is between micelles and liposomes. In the bicell structure, since the component G can be compounded in the lipid bilayer membrane, more components G can be compounded than the micelle. In addition, since it does not have the particle size of liposomes, it has excellent storage stability. Further, if the particle size is within the above range, transparency is not impaired.
By the above mechanism, the skin cosmetic composition of the present invention can be excellent in transparency and storage stability while being an aqueous skin cosmetic composition containing an oil having an emollient effect.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited only to these Examples. In addition, the compounding amount described in the table is the compounding amount of each component (that is, the compounding amount of the active ingredient in each raw material; so-called pure content), and is represented by "% by mass" unless otherwise specified.

Examples 1 to 18, Comparative Examples 1 to 11
Using the components shown in the table, the compositions for skin cosmetics of Examples and Comparative Examples were prepared by a conventional method.

主 The main components described in the table are as follows.

Hydrogenated lecithin: hydrogenated soybean lecithin Polyoxyethylene phytostanol: trade name "NIKKOL BPSH-25", manufactured by Nikko Chemicals Co., Ltd., POE-25 phytostanol polyoxyethylene phytosterol A: trade name "NIKKOL BPS-20", Nikko Chemicals Co., Ltd., POE-20 phytosterol polyoxyethylene phytosterol B: trade name "NIKKOL BPS-30", Nikko Chemicals Co., Ltd., POE-30 phytosterol polyoxyethylene phytosterol C: trade name "NIKKOL BPS-5", Nikko POE-5 phytosterol polyoxyethylene phytosterol D manufactured by Chemicals Co., Ltd .: trade name "NIKKOL BPS-10", POE-10 phyto manufactured by Nikko Chemicals Co., Ltd. Sterol Sterol: Phytosterol Polyoxyethylene-hardened castor oil A: Trade name "EMALEX HC-20", manufactured by Nippon Emulsion Co., Ltd., PEG-20 hydrogenated castor oil, HLB: 9.0
Polyoxyethylene hydrogenated castor oil B: trade name "Brownon RCW-40", manufactured by Aoki Yushi Kogyo KK, PEG-40 hydrogenated castor oil, HLB: 12.5
Polyoxyethylene hydrogenated castor oil C: trade name "Brownon RCW-50", manufactured by Aoki Yushi Kogyo KK, PEG-50 hydrogenated castor oil, HLB: 13.5
Polyethylene glycol monostearate: trade name "MYS-40V", manufactured by Nikko Chemicals Co., Ltd., PEG-40 stearate

(Evaluation)
The skin cosmetic compositions obtained in Examples and Comparative Examples were evaluated as follows.

(1) Transparency The compositions for skin cosmetics of Examples and Comparative Examples immediately after preparation were visually observed. As a result, all the examples were transparent.

(2) Storage stability (5 ° C, 40 ° C)
50 g of the skin cosmetic composition of each Example and Comparative Example was placed in a screw tube and stored in a thermostat at 5 ° C. or 40 ° C. for 14 days. The appearance of the screw tube of each skin cosmetic composition after storage was visually observed, and storage stability was evaluated according to the following evaluation criteria. The evaluation results are shown in the table.

<Evaluation criteria for storage stability>
〇 (good): no separation, no precipitate or lees are observed.
X (poor): separation, precipitate or lees are observed.

The skin cosmetic compositions (Examples) of the present invention containing components A to H and having a B / A value in the range of 5.5 to 18.0 all have a clear appearance and are stored at a low temperature ( (5 ° C.) and storage under high temperature (40 ° C.), no separation, precipitation or sediment was observed. That is, it was found that the skin cosmetic composition of the present invention was excellent in transparency and excellent in storage stability at low and high temperatures.

On the other hand, the skin cosmetic composition of Comparative Example, which lacks any of the components A, B, F, and H, can separate, precipitate, or precipitate under any of low-temperature storage (5 ° C.) and high-temperature storage (40 ° C.). Was observed. In Comparative Examples 1 to 3, which lack the components A, B, or F, which are the main components of the bicellular bilayer membrane, it is presumed that the bicell structure itself was not formed. When component H (polyoxyethylene hydrogenated castor oil having a specific number of moles of oxyethylene added) contributes to the stabilization of the bicell structure, Comparative Examples 4 to 10 lacking this did not stabilize the bicell structure and collapsed. It is supposed to be. In Comparative Example 11, when the B / A value was outside the range specified in the present invention, the storage stability at low and high temperatures was poor.

Further, Formulation Examples of the skin cosmetic composition of the present invention will be shown.
[Prescription example 1: lotion]
Dipropylene glycol 5.0% by mass
Glycerin 15.0% by mass
Tri (caprylic / capric acid) glyceryl 3.0% by mass
Squalane 1.0% by mass
0.5% by mass of cetanol
Polysorbate 60 0.1% by mass
Polysorbate 65 0.1% by mass
Dimethicone 1.0% by mass
(Acrylates / alkyl acrylate (C10-30)) cross polymer 0.2% by mass
0.07% by mass of carbomer
1,3-butylene glycol 0.08% by mass
Octoxyglycerin 0.2% by mass
Phenoxyethanol 0.3% by mass
Cetyl phosphate 0.1% by mass
1.0 mass% isomerized sugar
Sodium hyaluronate 0.01% by mass
Hydrolyzed hyaluronic acid 0.01% by mass
Arginine 0.4 mass%
Disodium edetate 0.05% by mass
Biosaccharide gum-1 0.01% by mass
Spice 0.05% by mass
5.0 mass% of the composition for skin cosmetics of Example 3
Purified water Remainder Total 100.0% by mass

[Prescription example 2: beauty milk lotion]
8.0% by mass of dipropylene glycol
Glycerin 2.0% by mass
Propylene glycol isostearate 0.5% by mass
0.5% by mass of hydrogenated lecithin
Phytosteryl oleate 0.1% by mass
(Ethylhexanoic acid / stearic acid / adipic acid) glyceryl 0.5% by mass
Glyceryl stearate 0.3% by mass
Inositol 0.4% by mass
1.0% by mass of polyglyceryl octastearate
Starch aluminum octenyl succinate 0.2% by mass
Dimethicone 1.0% by mass
Behenyl alcohol 1.0% by mass
Glyceryl behenate 1.0% by mass
Polysorbate 60 0.7% by mass
Rice bran extract 0.1% by mass
0.3% by mass of caprylyl glycol
0.25% by mass of carbomer
Octoxyglycerin 0.05% by mass
Macadamia nut fatty acid phytosteryl 0.2% by mass
Potassium hydroxide 0.1% by mass
Phenoxyethanol 0.1% by mass
Composition for skin cosmetic of Example 4 10.0% by mass
Purified water Remainder Total 100.0% by mass

[Prescription example 3: sheet mask]
<Cosmetic composition>
Polyoxyethylene hydrogenated castor oil 0.3% by mass
Lecithin hydroxide 0.5% by mass
1,3-butylene glycol 5.0% by mass
Glycerin 5.0% by mass
Maltitol 0.3% by mass
Sorbitol 0.2% by mass
Hydroxyethyl urea 1.0% by mass
Phenoxyethanol 0.3% by mass
8.0% by mass of dipropylene glycol
Polyethylene glycol 4000 0.4% by mass
0.08% by mass of carbomer
Xanthan gum 0.1% by mass
Disodium edetate 0.08% by mass
Hydrolyzed hyaluronic acid 0.01% by mass
Hydrolyzed collagen 0.05% by mass
Button extract 0.3% by mass
Fig extract 0.1% by mass
Rosehip oil 0.05% by mass
Octoxyglycerin 0.05% by mass
Potassium hydroxide 0.08% by mass
Caprylyl glycol 0.05 mass%
Polyquaternium-51 0.01% by mass
Macadamia nut fatty acid phytosteryl 0.01% by mass
(Glycerylamidoethyl methacrylate / stearyl methacrylate) copolymer 0.01% by mass
1.0% by mass of the skin cosmetic composition of Example 12
Purified water Remainder Total 100.0% by mass
<Sheet substrate>
Non-woven fabric (50% synthetic fiber, 50% lyocell) 100.0% by mass
11.0 parts by mass of the cosmetic composition was impregnated into 1.0 part by mass of the sheet base material.

[Formulation Example 4: Gel Cream]
Saccharomyces / Rice fermented liquid 10.0% by mass
Trioctanoin 3.0% by mass
8.0% by mass of dipropylene glycol
Glycerin 5.0% by mass
Squalane 5.0% by mass
Hydroxystearic acid hydrogenated castor oil 0.5% by mass
Propylene glycol isostearate 0.5% by mass
0.5% by mass of hydrogenated lecithin
Phytosteryl oleate 0.1% by mass
(Acrylates / beheneth-25 methacrylate) copolymer 0.8% by mass
Glyceryl stearate 0.3% by mass
Inositol 0.4% by mass
0.3% by mass of polyglyceryl octastearate
Rice bran extract 0.2% by mass
Dimethicone 1.0% by mass
Behenyl alcohol 1.0% by mass
Glyceryl behenate 0.3% by mass
Polysorbate 60 0.7% by mass
Rice bran extract 0.1% by mass
Caprylyl glycol 0.01% by mass
Carbomer 0.05% by mass
Octoxyglycerin 0.05% by mass
Macadamia nut fatty acid phytosteryl 0.2% by mass
Potassium hydroxide 0.15% by mass
Phenoxyethanol 0.1% by mass
Skin cosmetic composition of Example 13 20.0% by mass
Purified water balance: Total 100.0% by mass

According to the skin cosmetic composition of the present invention, it is possible to provide a skin cosmetic composition which can contain a relatively large amount of oil and is excellent in transparency and storage stability.

Claims (3)

The following component A, the following component B, the following component C, the following component D, the following component E, the following component F, the following component G, and the following component H are contained. Wherein the mass ratio (B / A) is 5.5 to 18.0.
Component A: Phospholipid Component B: Polyoxyethylene sterol ether having an average addition mole number of oxyethylene of 15 to 50 and / or polyoxyethylene stanol ether having an average addition mole number of oxyethylene of 15 to 50 Component C: Branched chain Component D: one or more polyhydric alcohols selected from the group consisting of propylene glycol, dipropylene glycol, and 1,3-butylene glycol Component E: water Component F: Sterol Component G: Oil Component H: Polyoxyethylene hydrogenated castor oil having an average added mole number of oxyethylene of 5 to 30 The skin cosmetic composition according to claim 1, further comprising the following component I.
Component I: glycerin mono 2-ethylhexyl ether The skin cosmetic composition according to claim 1, further comprising the following component J.
Component J: 1,2-alkanediol having 5 to 10 carbon atoms