KR102532929B1 - Composition for skin cosmetics - Google Patents

Abstract

The present invention provides a composition for skin cosmetics that can contain a relatively large amount of oil and has excellent transparency and storage stability.
Component A below, component B below, component C below, component D below, component E below, component F below, component G below, component H below, and component B relative to component A. A composition for skin cosmetics having a mass ratio (B/A) of 5.5 to 18.0:
Component A: Phospholipids
Component B: Polyoxyethylene sterol ethers having an average added mole number of oxyethylene of 15 to 50 and/or polyoxyethylene stanol ethers having an average added mole number of oxyethylene of 15 to 50
Component C: branched chain monohydric aliphatic alcohol having 12 to 24 carbon atoms
Component D: at least one polyhydric alcohol selected from the group consisting of propylene glycol, dipropylene glycol and 1,3-butylene glycol
Ingredient E: Water
Ingredient F: Sterol
Ingredient G: Oil
Component H: Polyoxyethylene hydrogenated castor oil having an average added mole number of oxyethylene of 5 to 30.

Description

Composition for skin cosmetics

The present invention relates to a composition for skin cosmetics. More specifically, it relates to a water-based skin cosmetic composition containing oil.

Conventionally, there is an emollient effect, such as preventing evaporation of water in the skin and softening keratin, and thus contributing to moisturizing properties, and it has been attempted to incorporate oil into water-based cosmetics. As a technology for blending water-insoluble oil into water-based cosmetics, solubilization by micelles (e.g., Patent Document 1) and technology using liposomes (closed vesicles) as carriers (e.g., Patent Document 2) etc. are known.

Japanese Patent Laid-Open No. 11-262653 Japanese Patent Laid-Open No. 5-286824

However, it has been extremely difficult to prepare a transparent water-based cosmetic containing oil in an amount sufficient to exert an emollient effect. For example, when micelles are formed with a nonionic surfactant, the size of the micelles is usually very small, about 10 to 20 nm, and there is not enough space to introduce oil into the micelles, so the amount of oil that can be blended becomes limited. For this reason, although a water-based cosmetic composition with a transparent appearance is obtained, it is difficult to say that a sufficient emollient effect is obtained.

In addition, there is also a problem with the technique of blending oil with liposomes. Liposomes are on the order of 100 nm in size and are larger than micelles, so that more oil can be blended into the liposome membrane. However, the transparency decreases depending on the particle size of the liposome, and in particular, when formulated into a low-viscosity lotion formulation, the storage stability is poor.

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

As a result of intensive studies to achieve the above object, the present inventors have found that phospholipids, specific polyoxyethylene sterol ethers and/or specific polyoxyethylene stanol ethers, specific aliphatic alcohols, specific polyhydric alcohols, An aqueous system containing 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 in a specific mass ratio. According to the composition for skin cosmetics, it was found that a composition for skin cosmetics that could contain a relatively large amount of oil and was excellent in transparency and storage stability was obtained. This invention was completed based on these knowledge.

That is, the present invention contains 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 composition for skin cosmetics in which the mass ratio (B/A) of the component B to A is 5.5 to 18.0.

Component A: Phospholipids

Component B: Polyoxyethylene sterol ethers having an average added mole number of oxyethylene of 15 to 50 and/or polyoxyethylene stanol ethers having an average added mole number of oxyethylene of 15 to 50

Component C: branched chain monohydric aliphatic alcohol having 12 to 24 carbon atoms

Component D: at least one polyhydric alcohol selected from the group consisting of propylene glycol, dipropylene glycol and 1,3-butylene glycol

Ingredient E: Water

Ingredient F: Sterol

Ingredient G: Oil

Component H: Polyoxyethylene hydrogenated castor oil having an average added mole number of oxyethylene of 5 to 30.

It is preferable that the said composition for skin cosmetics further contains the following component I.

Component I: Glycerin mono2-ethylhexyl ether.

It is preferable that the said composition for skin cosmetics further contains the following component J.

Component J: 1,2-alkanediol having 5 to 10 carbon atoms.

According to the composition for skin cosmetics of the present invention, it is possible to provide a composition for skin cosmetics that can contain a relatively large amount of oil and has excellent transparency and storage stability.

The skin cosmetic composition of the present invention includes a phospholipid; polyoxyethylene sterol ethers having an average added mole number of oxyethylene of 15 to 50 and/or polyoxyethylene stanol ethers having an average added mole number of oxyethylene of 15 to 50; C12-C24 monohydric aliphatic alcohol which has a branched chain; at least one polyhydric alcohol selected from the group consisting of propylene glycol, dipropylene glycol and 1,3-butylene glycol; water; sterols; oil; Polyoxyethylene hydrogenated castor oil having an average added mole number of oxyethylene of 5 to 30 is included at least. In addition, in the present specification, phospholipid is "component A", polyoxyethylene sterol ether having an average added mole number of oxyethylene of 15 to 50 and/or polyoxyethylene stanol ether having an average added mole number of oxyethylene of 15 to 50 "component B", monohydric aliphatic alcohol having 12 to 24 branched carbon atoms, "component C", propylene glycol, dipropylene glycol, and 1,3-butylene glycol, and at least one polyhydric alcohol selected from the group consisting of "Component D", water as "component E", sterol as "component F", oil as "component G", polyoxyethylene hydrogenated castor oil having an average added mole number of oxyethylene of 5 to 30 as "component H", respectively. Sometimes called

The skin cosmetic composition of the present invention preferably further contains glycerin mono2-ethylhexyl ether. Moreover, it is preferable that the composition for skin cosmetics of this invention further contains 1, 2- alkane diol of 5-10 carbon atoms. In addition, in this specification, the said glycerol mono 2-ethylhexyl ether is sometimes called "component I". Moreover, the said C5-C10 1, 2- alkane diol may be called "component J".

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 composition for skin cosmetics of the present invention may further contain component I and/or component J. Moreover, the composition for skin cosmetics of this invention may contain components other than the said components A-J. In addition, 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 another component, may respectively use only 1 type, and may use 2 or more types.

[Component A]

Component A is a "phospholipid". Component A forms a bicell structure (disc-shaped lipid bilayer film composed of phospholipids), which is a type of micelle. For this reason, a relatively large amount of oil can be contained in the bicell structure.

As component A, natural phospholipids, synthetic phospholipids, and hydrogenated phospholipids in which unsaturated carbon chains of naturally occurring phospholipids are saturated with hydrogen are exemplified as composite lipids containing a phosphoric acid residue. Examples of the phospholipid include natural phospholipids such as phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylinositol, lysophosphatidylcholine, sphingomyelin, egg yolk lecithin, and soybean lecithin; synthetic phospholipids such as dilauroylphosphatidylcholine, dimyristoylphosphatidylcholine, dipalmitoylphosphatidylcholine, distearoylphosphatidylcholine, dioleoylphosphatidylcholine, and palmitoyl/oleoylphosphatidylcholine; and hydrogenated phospholipids such as hydrogenated soybean lecithin, hydrogenated egg yolk lecithin, hydrogenated phosphatidylcholine, and hydrogenated phosphatidylserine. Among these, from the viewpoint of excellent storage stability, hydrogenated phospholipids are preferred, and hydrogenated soybean lecithin is more preferred. Component A may use only 1 type, and may use 2 or more types.

As component A, a commercial item can be used. Commercially available hydrogenated soybean lecithins include, for example, brand name "COATSOME NC-21", brand name "COATSOME NC-61" (above, manufactured by Nichiyu Co., Ltd.), brand name "NIKKOL Lecinol S-10EX", brand name "NIKKOL Lesinol S-10E", trade name "NIKKOL Lesinol S-10M" (above, manufactured by Nikko Chemicals Co., Ltd.), trade name "Basis LS-60HR" (manufactured by Nissin Oilio Group Co., Ltd.), etc. can

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

[Component B]

Component B is "polyoxyethylene sterol ether having an average added mole number of oxyethylene of 15 to 50 and/or polyoxyethylene stanol ether having an average added mole number of oxyethylene of 15 to 50". That is, component B is any one or both of the said polyoxyethylene sterol ether and the said polyoxyethylene stanol ether. Component B has high affinity with component A and forms a bimolecular film with component A. In addition, it is estimated that the curvature of the bimolecular film is adjusted, thereby contributing to the stabilization of the bicell structure. As component B, polyoxyethylene stanol ether is more preferable from the viewpoint of excellent oxidation stability.

Polyoxyethylene sterol ether or polyoxyethylene stanol ether is obtained by adding oxyethylene to sterol or stanol. The average added mole number of oxyethylene 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 these, vegetable polyoxyethylene phytosterol ethers and polyoxyethylene phytostanol ethers are preferred. Component B may use only 1 type, and may use 2 or more types.

As component B, you may use a commercial item. As a commercial item of component B, a brand name "NIKKOL BPS-20", a brand name "NIKKOL BPS-30", a brand name "NIKKOL BPSH-25" (above, manufactured by Nikko Chemicals Co., Ltd.), etc. are mentioned, for example. .

The content of component B in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.03% by mass or more, and more preferably 1.0% by mass relative to 100% by mass of the total amount of the composition for skin cosmetic of the present invention. More than that. When the content ratio is 0.03% by mass or more, it sufficiently contributes to the stabilization of the bicell structure, and the transparency and storage stability are further excellent. As for the upper limit of the said content rate, 15.0 mass % or less is preferable, More preferably, it is 10.0 mass % or less. When the content ratio is 15.0% by mass or less, an excessive increase in viscosity can be suppressed and dispersibility can be further improved. The content rate of the component B is the sum of the content rates of all components B in the skin cosmetic composition of the present invention.

The mass ratio (B/A) of component B to 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. Moreover, the said mass ratio (B/A) is 18.0 or less, Preferably it is 15.0 or less, More preferably, it is 12.0 or less. Transparency and storage stability are further excellent as the said mass ratio (B/A) is in the said range.

[Component C]

Component C is "a monohydric aliphatic alcohol having branched chains and having 12 to 24 carbon atoms". It is presumed that the use of component C makes the lipid bilayer membrane flexible and contributes to its stabilization.

As component C, octyldodecanol, decyltetradecanol, isostearyl alcohol, etc. are mentioned, for example. Especially, from a viewpoint of improving storage stability, octyldodecanol and decyl tetradecanol are preferable. Component C may use only 1 type, and may use 2 or more types.

The content of component C in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.005% by mass or more, and more preferably 0.05% by mass relative to 100% by mass of the total amount of the composition for skin cosmetic of the present invention. or more, more preferably 0.1% by mass or more. Storage stability is further excellent as the said content rate is 0.005 mass % or more. As for the upper limit of the said content rate, 0.5 mass % or less is preferable, More preferably, it is 0.4 mass % or less. Transparency is further improved as the said content rate is 0.5 mass % or less. The content rate of the component C is the sum of the content rates of all components C in the skin cosmetic composition of the present invention.

The mass ratio (C/A) of component C to 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, still more preferably 0.15 or more. The storage stability is further excellent as the said mass ratio (C/A) is 0.05 or more. The upper limit of the mass ratio (C/A) is preferably 1.0 or less, more preferably 0.7 or less, still more preferably 0.5 or less. Transparency is further excellent as the said mass ratio (C/A) is 1.0 or less.

[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 in the preparation of a skin cosmetic composition. In particular, by using the specific three components of component D, the increase in viscosity of the dispersion liquid when other components are dispersed is suppressed, and the dispersibility is improved. Component D may use only 1 type, and may use 2 or more types.

The content of component D in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.25% by mass or more, and more preferably 3.0% by mass relative to 100% by mass of the total amount of the composition for skin cosmetic of the present invention. or more, more preferably 5.0% by mass or more. The upper limit of the content is preferably 30.0% by mass or less, more preferably 25.0% by mass or less, still more preferably 15.0% by mass or less. Transparency and storage stability are further excellent as the said content rate is in the said range. The content rate of the component D is the sum of the content rates of all components D in the skin cosmetic composition of the present invention.

The mass ratio (D/A) of component D to component A in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 8.0 or more, and 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, still more preferably 20.0 or less. When the mass ratio (D/A) is within the above range, the cloudiness prevention of the composition for skin cosmetics is further excellent.

[Component E]

Component E is "water". By using water, it is possible to impart moisture and a fresh feeling to the composition for skin cosmetics of the present invention, and furthermore, the composition for skin cosmetics of the present invention can be applied to skin cosmetics such as water-based lotions.

The content of component E in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 55.0% by mass or more, and more preferably 60.0% by mass relative to 100% by mass of the total amount of the composition for skin cosmetic of the present invention. or more, more preferably 65.0 mass% or more. As for the said content rate, 95.0 mass % or less is preferable, More preferably, it is 90.0 mass % or less, More preferably, it is 85.0 mass % or less. When the above blending ratio is within the above range, it is preferable because convenience and refreshing feeling when applied to a water-based lotion are obtained.

[Component F]

Component F is a "sterol". Component F is presumed to contribute to the stabilization of the bicell structure by adjusting the curvature of the bimolecular film. In addition, it is blended as an active ingredient for improving skin barrier function and the like.

Component F includes, for example, animal sterols and plant sterols (phytosterols). Examples of animal sterols include cholesterol, cholestanol, and 7-dihydrocholesterol. Moreover, as a plant sterol, sitosterol, stigmasterol, fucosterol, spinasterol, brassicasterol etc. are mentioned, for example. Component F may use only 1 type, and may use 2 or more types.

As component F, a commercial item can be used. Commercially available products of component F include, for example, brand name "Cholesterol JSQI", brand name "Nippon Yak Kyokuho Cholesterol" (above, manufactured by Nippon Seika Co., Ltd.), brand name "Phytosterol" (manufactured by Eisai Food Chemical Co., Ltd.) , trade name "Phytosterol-SKP" (manufactured by Tama Seikagaku Co., Ltd.), and the like.

The content of component F in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.01% by mass or more, more preferably 0.1% by mass, relative to 100% by mass of the total amount of the composition for skin cosmetic of the present invention. or more, more preferably 0.2% by mass or more. If the said content rate is 0.01 mass % or more, a barrier function etc. can be provided to skin. The upper limit of the content ratio is preferably 2.0% by mass or less, more preferably 1.0% by mass or less, still more preferably 0.6% by mass or less. When the mass ratio is 2.0% by mass or less, the improvement in storage stability is further excellent. The content rate of the component F is the sum of the content rates of all components F in the skin cosmetic composition of the present invention.

[Component G]

Component G is "oil". As component G, vegetable oil, ester oil, silicone oil, hydrocarbon oil, lead, higher fatty acids, higher alcohols other than component C, etc. are mentioned, for example. In the skin cosmetic composition of the present invention, component G is used as an emollient component for preventing evaporation of skin moisture and softening keratin. In addition, component G shall not contain what corresponds to component F. Component G may use only 1 type, and may use 2 or more types.

Examples of the vegetable oil include macadamia nut oil, eucalyptus oil, palm oil, avocado oil, safflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, shea oil (shea butter), cacao butter, almond oil, sunflower oil, Rosehip Oil, Olive Squalane, Kiwifruit Seed Oil, Apricot Seed 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 Lead (Rosa Damascena Flower Wax), Rosa Centifolia Flower Wax, jasmine flower wax, camellia oil, hydrogenated products thereof (e.g. hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated oil) avocado oil, hydrogenated soybean oil, etc.); and the like.

Examples of the ester oil include ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, 2-ethylhexyl palmitate, octyldodecyl myristate, isopropyl isostearate, iso Propylene glycol stearate, cetyl 2-ethylhexanoate, glyceryl tri2-ethylhexanoate, tri(caprylic/capric acid) glyceryl, isononanoate isononyl, diisopropyl adipate, pentaerys tetraoctanoate lytyl, pentaerythrite tetraisostearate, diisostearyl malate, erythrityl triethylhexanoate, 2-ethylhexyl hydroxystearate, hexa(hydroxystearic acid/stearic acid/rosinic acid) dipentaerythrityl, tetra(hydroxy Stearic acid/isostearic acid) dipentaerythrityl, hexahydroxystearic acid dipentaerythrityl, (ethylhexanoic acid/stearic acid/adipic acid) glyceryl, tri(caprylic/capric acid/myristic acid/stearic acid) 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 oils such as methylpolysiloxane and highly polymerized methylpolysiloxane; methylphenyl silicone oils such as methylphenylpolysiloxane; cyclic silicone oils such as methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane; amino-modified silicones such as aminopropylmethylsiloxane/dimethylsiloxane copolymer, aminoethylaminopropylsiloxane/dimethylsiloxane copolymer, aminoethylaminopropylmethylsiloxane/dimethylsiloxane copolymer, carboxy-modified silicone, fatty acid-modified silicone, alcohol-modified silicone, modified silicones such as aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone, and alkyl-modified silicone; Methyl hydrogen polysiloxane, dimethiconol, etc. are mentioned.

Examples of the hydrocarbon oil include α-olefin oligomer, vaseline, isoparaffin, light isoparaffin, light liquid isoparaffin, squalane, synthetic squalane, vegetable squalane, liquid isoparaffin, liquid paraffin, etc., hydrogenated polyisobutene, Hydrogenated (tetradecenyl/methylpentadecene), isododecane, etc. are mentioned.

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

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

Examples of higher alcohols other than the component C include cetyl alcohol, stearyl alcohol, myristyl alcohol, and oleyl alcohol.

Especially, as component G, it is preferable to contain a highly polar oil component. Moreover, it is more preferable that the highly polar oil component has a sterol skeleton. When highly polar oil is included as component G, the emollient effect is further improved. As for the highly polar oil, only one type may be used, or two or more types may be used.

Any of plant-derived, animal-derived, and mineral-derived oils can be used as the highly polar oil. As polar oils, for example, hydrogenated palm oil, hydrogenated jojoba oil, shea oil, (adipic acid, 2-ethylhexanoic acid, stearic acid) glyceryl oligoesters, macadamia nut fatty acid phytosteryl, tricapryl Glyceryl acid, glyceryl tricaprate, glyceryl trimyristate, glyceryl tristearate, phytosteryl oleate, dipentaerythrityl hydroxystearate, dipentaerythrityl stearate, dipentaerythrityl rosinate, hexa Dipentaerythrityl hydroxystearate etc. are mentioned. From the viewpoint of further enhancing the emollient effect of the skin cosmetic composition of the present invention, phytosteryl oleate is preferred.

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

The mass ratio (G/A) of component G to 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, still more preferably 0.05 or more. The mass ratio (G/A) is preferably 1.0 or less, more preferably 0.8 or less, still more preferably 0.5 or less. The storage stability is further excellent when the said mass ratio (G/A) is in the said range.

[Component H]

Component H is “polyoxyethylene hydrogenated castor oil having an average added mole number of oxyethylene of 5 to 30”. Component H is presumed to contribute to the stabilization of the bicell structure by adjusting the curvature of the bimolecular film in the skin cosmetic composition of the present invention. In particular, the effect of stably confining component G in the film and enhancing storage stability is exhibited. Component H may use only 1 type, and may use 2 or more types.

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

The HLB (Hydrophile-Lipophile Balance) value of component H is not particularly limited, but is, for example, 6.0 to 11.0, preferably 6.5 to 10.5. When component H whose HLB value is within the above range is used, it contributes to storage stability. The more lipophilic the HLB value of component H is, the better storage stability is exhibited. In addition, the said HLB value is computable by the Griffin method.

The content of component H in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.05% by mass or more, and more preferably 0.5% by mass relative to 100% by mass of the total amount of the composition for skin cosmetic of the present invention. More than that. The content ratio is preferably 5.0% by mass or less, more preferably 3.0% by mass or less, still more preferably 2.0% by mass or less. When the content ratio is within the above range, the effect of stably confining component G in the lipid bilayer film is further excellent. The content rate of the component H is the sum of the content rates of all components H in the skin cosmetic composition of the present invention.

[Component I]

Component I is "glycerol mono 2-ethylhexyl ether" (also referred to as "octoxyglycerin"). In the case of containing component I, it is presumed that flexibility is imparted to the membrane shape because it enters the lipid bilayer membrane of the bicell structure. For this reason, the skin cosmetic composition of the present invention further improves transparency and storage stability.

When the composition for skin cosmetics of the present invention contains component I, the content ratio of component I in the composition for skin cosmetics of the present invention is not particularly limited, but with respect to 100% by mass of the total amount of the composition for skin cosmetics of the present invention, 0.01 mass % or more is preferable, More preferably, it is 0.05 mass % or more, More preferably, it is 0.1 mass % or more. Transparency and storage stability are further excellent as the said content rate is 0.01 mass % or more. The upper limit of the content is preferably 2.0% by mass or less, more preferably 1.5% by mass or less, still more preferably 1.0% by mass or less. When the content ratio is 2.0% by mass or less, a more mild agent can be obtained.

[Component J]

Component J is "a 1,2-alkanediol having 5 to 10 carbon atoms". In the case of containing component J, it is presumed that flexibility is imparted to the membrane shape because it enters the lipid bilayer membrane of the bicell structure. For this reason, the skin cosmetic composition of the present invention further improves transparency and storage stability.

As component J, 1, 2- pentanediol, 1, 2- hexanediol, 1, 2- octanediol, 1, 2- decanediol etc. are mentioned, for example. Component J may use only 1 type, and may use 2 or more types.

When the skin cosmetic composition of the present invention contains component J, the content ratio of component J in the skin cosmetic composition of the present invention is not particularly limited, but relative to the total amount of 100% by mass of the skin cosmetic composition of the present invention, 0.01 mass % or more is preferable, More preferably, it is 0.1 mass % or more, More preferably, it is 0.2 mass % or more. Transparency and storage stability are further excellent as the said content rate is 0.01 mass % or more. The upper limit of the content is preferably 2.0% by mass or less, more preferably 1.0% by mass or less, still more preferably 0.7% by mass or less. When the content ratio is 2.0% by mass or less, a more mild agent can be obtained. The content rate of the component J is the sum of the content rates of all 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. Examples of the other components include, but are not particularly limited to, surfactants other than component H (cationic surfactants, anionic surfactants, nonionic surfactants, amphoteric surfactants, etc.), lower alcohols, and higher alcohols other than component C. , polyhydric alcohols other than component D, ultraviolet absorbers, powders, antioxidants, preservatives, fragrances, coloring agents, chelating agents, cooling agents, thickeners, vitamins, neutralizers, amino acids, pH adjusters, whitening agents, and additives such as anti-inflammatory agents, deodorants, animal and plant extracts, and metal ion sequestering agents. As for the said other component, only 1 type may be used, and 2 or more types may be used.

The external appearance of the skin cosmetic composition of the present invention is preferably in a transparent state from the viewpoint of aesthetics. In addition, the high transparency of the skin cosmetic composition of the present invention means that no aggregation or creaming of the blended oil components has occurred, indicating that it is in a very stable state. For this reason, the transparency of the skin cosmetic composition of the present invention is also an index of storage stability.

In the skin cosmetic composition of the present invention, component A (phospholipid) forms a bicell structure, which is a type of micelle. The bicell structure is a disc-shaped lipid bilayer film composed of phospholipids. The bicell structure in the skin cosmetic composition of the present invention has a particle diameter of about 20 to 50 nm, which is intermediate between micelles and liposomes. Since the bicell structure can incorporate oil into the lipid bilayer membrane, more oil can be incorporated than micelles. In addition, since it does not have a particle size comparable to that of liposomes, it is also excellent in storage stability. Moreover, if it is the said bicell structure, transparency is also not impaired.

For the above reasons, the composition for skin cosmetics of the present invention is preferably a composition for skin cosmetics that does not contain liposomes formed of phospholipids.

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 skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.5 to 1000 mPa·s, and more preferably 0.5 to 500 mPa·s, for example, at 25°C. Viscosity measurement is performed at a rotational speed of 60 r/min using a B-type viscometer and selecting a rotor suitable for the viscosity.

The average particle diameter 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, still more preferably 40 nm or more. When the lower limit of the average particle diameter is 20 nm or more, a space for introducing the component G into 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, still more preferably 80 nm or less. When the upper limit of the average particle diameter is 100 nm or less, storage stability and transparency become more excellent.

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

In order to prepare the skin cosmetic composition of the present invention, it can be prepared by mixing the above components and stirring them using a known method, for example, a homomixer.

Moreover, skin cosmetics, such as lotion, can be manufactured by mixing the composition for skin cosmetics of this invention with the component used for skin cosmetics. 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 manufacture of skin cosmetics. Since the composition for skin cosmetics of the present invention can be stably dispersed even in an aqueous system or a low-viscosity dispersion medium, component G can be incorporated into skin cosmetics. Moreover, the composition for skin cosmetics of this invention can also be used as a skin cosmetic composition per se.

In the present invention, a skin cosmetic composition containing the composition for skin cosmetics of the present invention described above is obtained. In addition, in this specification, the said "skin cosmetic composition containing the composition for skin cosmetics of this invention" is sometimes called the "skin cosmetic composition of this invention." The content of the composition for skin cosmetic composition of the present invention in 100% by mass of the skin cosmetic composition 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 skin cosmetic composition (or skin cosmetic) of the present invention is not particularly limited, but for example, lotion (lotion), cream, gel, emulsion, aerosol spray, natural spray, stick, powder, roll-on, Various formulations, such as a sheet (paper), are mentioned. Among them, lotions (lotions), creams, gels, and emulsions are preferable, and lotions (lotions) are more preferable.

The composition for skin cosmetics (or skin cosmetics) of the present invention is not particularly limited, and examples thereof include moisturizing cosmetics, whitening cosmetics, acne care cosmetics, and anti-aging cosmetics (for example, for the purpose of suppressing wrinkles and sagging, etc.) referred to as) skin care cosmetics such as; scalp care cosmetics (for the purpose of, for example, moisturizing, sebum suppression, etc.); deodorant cosmetics; sunblock cosmetics; shaving cosmetics; Washing materials for the body (for example, body shampoo, solid soap, etc.), for the scalp, and the like are exemplified. Especially, it is preferable that the composition for skin cosmetics (or skin cosmetics) of this invention is a skin care cosmetic and scalp care cosmetics, and it is more preferable that it is a skin care cosmetic. The composition for skin cosmetics (or skin cosmetics) of the present invention may be, for example, any of cosmetics, quasi-drugs, pharmaceuticals, and miscellaneous goods.

The site to which the composition for skin cosmetics (or skin cosmetics) of the present invention is applied is not particularly limited, and the face (eg, forehead, eyes, tails of eyes, cheeks, mouth, etc.), arms, elbows, backs of hands, fingertips, Examples include the legs, knees, heels, neck, armpits, back, and scalp.

The skin cosmetic composition of the present invention is a skin cosmetic composition using water (component E) as a medium, comprising phospholipid (component A), polyoxyethylene sterol ether having an average added mole number of oxyethylene of 15 to 50, and/or oxyethylene. Polyoxyethylene stanol ether (component B) having an average added mole number of ethylene of 15 to 50, a monohydric aliphatic alcohol having 12 to 24 carbon atoms having a branched chain (component C), propylene glycol, dipropylene glycol and 1,3- At least one polyhydric alcohol (component D) selected from the group consisting of butylene glycol, a sterol (component F), an oil component (component G), polyoxyethylene hydrogenated castor oil having an average added mole number of oxyethylene of 5 to 30 (component H ). The bicell structure in the skin cosmetic composition of the present invention is composed of component A, component B, component C, component F, component G, and component H, with component A as the center. In addition, component D functions as a solvent for other components at the time of production. Although the role of each component has not been completely elucidated, it is presumed that component B, component F, and component H adjust the curvature of the lipid bilayer membrane, and component C contributes to the flexibility of the lipid bilayer membrane, but the stability of the bicell structure. This 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 membrane, component G can be stably incorporated into the lipid bilayer membrane. It is characterized by

The bicell structure in the skin cosmetic composition of the present invention has a particle diameter of about 20 to 50 nm, which is intermediate between micelles and liposomes. Since the bicell structure can incorporate component G into the lipid bilayer membrane, more component G can be incorporated than micelles. In addition, since it does not have a particle size comparable to that of liposomes, it is also excellent in storage stability. Moreover, transparency is not impaired as long as it is the range of the said particle diameter.

According to the above mechanism, the composition for skin cosmetics of the present invention can be made excellent in transparency and storage stability while being an aqueous composition for skin cosmetics containing oil having an emollient effect.

Example

Below, the present invention will be described in more detail based on examples, but the present invention is not limited only to these examples. In addition, the compounding quantity described in the table|surface is the compounding quantity of each component (ie, the compounding quantity of the active ingredient in each raw material, so-called pure part), and is expressed by "mass %" unless otherwise indicated.

Examples 1 to 18, Comparative Examples 1 to 11

Using each component recorded in the table|surface, each skin cosmetic composition of the Example and the comparative example was prepared by the usual method.

The main components described in the tables 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", manufactured by Nikko Chemicals Co., Ltd., POE-20 phytosterol

Polyoxyethylene phytosterol B: trade name "NIKKOL BPS-30", manufactured by Nikko Chemicals Co., Ltd., POE-30 phytosterol

Polyoxyethylene phytosterol C: trade name "NIKKOL BPS-5", manufactured by Nikko Chemicals Co., Ltd., POE-5 phytosterol

Polyoxyethylene phytosterol D: trade name "NIKKOL BPS-10", manufactured by Nikko Chemicals Co., Ltd., POE-10 phytosterol

Sterols: Phytosterols

Polyoxyethylene hydrogenated 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 Co., Ltd., PEG-40 hydrogenated castor oil, HLB: 12.5

Polyoxyethylene hydrogenated castor oil C: trade name "Brownon RCW-50", manufactured by Aoki Yushi Kogyo Co., Ltd., 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 compositions for skin cosmetics obtained in Examples and Comparative Examples were evaluated as follows.

(1) Transparency

Visual observation was performed about the composition for skin cosmetics of each Example and Comparative Example immediately after preparation. As a result, all examples were transparent.

(2) Storage stability (5℃, 40℃)

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 external 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 listed in the table.

<Evaluation criteria for storage stability>

○ (good): Separation, precipitate, or precipitate was not recognized at all.

× (defect): Recognize separation, precipitate or precipitate.

[Table 1]

[Table 2]

All of 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 show a clear appearance, and are stored at a low temperature (5°C) or at a high temperature. Even under (40° C.), no separation, precipitate or precipitate was recognized. That is, it can be seen that the skin cosmetic composition of the present invention has excellent transparency and excellent storage stability at low and high temperatures.

On the other hand, in the skin cosmetic composition of Comparative Examples lacking any of components A, B, F, and H, separation, precipitate, or precipitate was observed in either low-temperature storage (5° C.) or high-temperature storage (40° C.). In Comparative Examples 1 to 3 lacking components A, B, or F, which are the main constituents of the bimolecular film of the bicell, it is assumed that the bicell structure itself is not constituted. Component H (polyoxyethylene hydrogenated castor oil having a specific number of added moles of oxyethylene) contributes to the stabilization of the bicell structure, and Comparative Examples 4 to 10 lacking this contribute to the stabilization of the bicell structure, which is collapsed. guessed Further, in Comparative Example 11, since the B/A value was outside the range specified in the present invention, storage stability at low and high temperatures was poor.

In addition, the formulation example of the composition for skin cosmetics of this invention is shown.

[Formulation Example 1: Lotion]

Dipropylene glycol 5.0% by mass

Glycerin 15.0% by mass

Tri(caprylic acid/capric acid) glyceryl 　　　　　　 3.0% by mass

Squalane = 1.0% by mass

Cetanol 　　　　　　　　　　　　　　　　　　 0.5% by mass

Polysorbate 60 0.1% by mass

Polysorbate 65 0.1% by mass

Dimethicone = 1.0% by mass

(Acrylate/alkyl acrylate (C10-30)) crosspolymer 0.2% by mass

Carbomer 0.07 mass%

1,3-butylene glycol 0.08% by mass

Octoxyglycerin = 0.2% by mass

Phenoxyethanol = 0.3% by mass

Cetyl Phosphate = 0.1% by mass

Isomerized sugar = 1.0% by mass

Sodium hyaluronate = 0.01% by mass

Hydrolyzed hyaluronic acid = 0.01% by mass

Arginine 0.4% by mass

Disodium edetate = 0.05% by mass

Biosaccharide gum-1　 　　　　　　　　　　　　　0.01% by mass

Flavoring agent 0.05% by mass

Composition for skin cosmetics of Example 3 = 5.0% by mass

Purified water ==========================

Total 100.0 mass%

[Formulation Example 2: Cosmetic Emulsion]

Dipropylene glycol = 8.0% by mass

Glycerin = 2.0% by mass

Propylene glycol isostearic acid 　　　 　　　　　0.5% by mass

Hydrogenated lecithin = 0.5% by mass

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 mass%

Polyglyceryl octastearate 　 　　　　　　　　　1.0 mass%

Octenylsuccinic acid starch aluminum 　　　　　　　　0.2% by mass

Dimethicone = 1.0 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

Caprylyl glycol 0.3% by mass

Carbomer = 0.25% by mass

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 cosmetics of Example 4 　　　　　　 10.0% by mass

Purified water = 　 = = balance

Total 100.0 mass%

[Prescription Example 3: Sheet Mask]

<Cosmetic composition>

Polyoxyethylene hydrogenated castor oil 0.3% by mass

Hydroxylated lecithin 　　　　　　　 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 mass%

Hydroxyethyl Urea 1.0% by mass

Phenoxyethanol = 0.3% by mass

Dipropylene glycol 　　　　　 　　　　　　　　　 8.0% by mass

Polyethylene glycol 4000　　　　　　　　　　 0.4% by mass

Carbomer = 0.08% by mass

Xanthan gum 　 　　　　　　　　　　　　　　　　　 0.1% by mass

Edetate disodium

Hydrolyzed hyaluronic acid 　　　　　 0.01 mass%

Hydrolyzed collagen 　　　　　　　　　　 0.05 mass%

Peony 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% by mass

Polyquaternium-51　　　　　　　　　　　　　 0.01% by mass

Macadamia nut fatty acid phytosteryl 　 　 　 0.01 mass%

(Glycerylamidoethyl methacrylate/stearyl methacrylate) copolymer 0.01% by mass

1.0% by mass of the composition for skin cosmetics of Example 12

Purified water ==========================

Total = 100.0 % by mass

<sheet material>

Non-woven fabric (synthetic fiber 50%, lyocell 50%) 　　 100.0 mass%

11.0 parts by mass of the cosmetic composition was impregnated with 1.0 parts by mass of the sheet substrate.

[Formulation Example 4: Gel Cream]

Saccharomyces/fermented rice liquid 　　　　　　　　　 10.0% by mass

Trioctanoin = 3.0% by mass

Dipropylene glycol 　　　　　　　　　　 8.0% by mass

Glycerin = 5.0% by mass

Squalane 　 　　　　　　　　　　　　　　　　　　　 5.0% by mass

Hydroxystearic acid hydrogenated castor oil 0.5% by mass

Propylene glycol isostearic acid 　　　　　　 0.5% by mass

Hydrogenated lecithin = 0.5% by mass

Phytosteryl oleate 　　　　　 0.1% by mass

(Acrylate/beheneth-25 methacrylate) copolymer 0.8% by mass

Glyceryl stearate 0.3% by mass

Inositol 　　　　 　　　　　　　　　　　　　　　 0.4% by mass

Polyglyceryl octastearate 　　 0.3% by mass

Rice bran extract 　 　 　 0.2 mass%

Dimethicone = 1.0% by mass

Behenyl alcohol 　　　　　　　　　　　　　　 1.0 mass%

Glyceryl behenate 　　　　　　 0.3 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 mass%

Phenoxyethanol 　　　 0.1 mass%

Composition for skin cosmetics of Example 13 = 20.0% by mass

Purified water 　　　　　　　　　　　　　　　　　　　　　　　　 balance

Total 　　　　　　　　　　　　　　　　　　 100.0 Mass%

According to the composition for skin cosmetics of the present invention, it is possible to provide a composition for skin cosmetics that can contain a relatively large amount of oil and has excellent transparency and storage stability.

Claims (3)

Component A below, component B below, component C below, component D below, component E below, component F below, component G below, component H below, and component B relative to component A. A composition for skin cosmetics having a mass ratio (B/A) of 5.5 to 18.0:
Component A: Phospholipids
Component B: polyoxyethylene sterol ethers having an average added mole number of oxyethylene of 15 to 50 or polyoxyethylene stanol ethers having an average added mole number of oxyethylene of 15 to 50, or both
Component C: branched chain monohydric aliphatic alcohol having 12 to 24 carbon atoms
Component D: at least one polyhydric alcohol selected from the group consisting of propylene glycol, dipropylene glycol and 1,3-butylene glycol
Ingredient E: Water
Ingredient F: Sterol
Ingredient G: Oil
Component H: Polyoxyethylene hydrogenated castor oil having an average added mole number of oxyethylene of 5 to 30. According to claim 1,
Additionally, a composition for skin cosmetics containing the following component I:
Component I: Glycerin mono2-ethylhexyl ether. According to claim 1 or 2,
Additionally, a composition for skin cosmetics containing the following component J:
Component J: 1,2-alkanediol having 5 to 10 carbon atoms.