JP2023152863A - Skin cosmetic composition - Google Patents

Abstract

To provide a skin cosmetic composition having excellent transparency and storage stability when various components are blended.SOLUTION: There is provided a skin cosmetic composition comprising a disk-like micelle which comprises the following component A, the following component B, the following component C, the following component D and the following component E. Component A: a phospholipid, Component B: an acyl amino acid salt having an acyl amino acid structure in which one or more acyl group parts selected from the group consisting of a cocoyl group, a lauroyl group and a myristoyl group and an amino acid part which is glutamic acid and/or aspartic acid are bonded, component C: a fatty acid polyglyceryl in which an average degree of polymerization of polyglycerol is 10, which is an ester of a fatty acid having 8 to 18 carbon atoms and a polyglycerin, component D: a fatty acid monoglyceride which is an ester of a fatty acid having 8 to 12 carbon atoms and glycerin, component E: water.SELECTED DRAWING: None

Description

The present invention relates to compositions for skin cosmetics.

Conventionally, attempts have been made to incorporate oil into water-based cosmetics because it has an emollient effect, such as preventing evaporation of water from the skin and softening the stratum corneum, and contributes to moisturizing properties. Techniques for blending poorly water-soluble oils into water-based cosmetics include solubilization using micelles (e.g., Patent Document 1) and technology using liposomes (closed endoplasmic reticulum) as carriers (e.g., Patent Document 2). , techniques using a bicell structure as a carrier (for example, Patent Documents 3 to 5) are known.

Japanese Patent Application Publication No. 11-262653 Japanese Patent Application Publication No. 5-286824 International Publication No. 2020/066895 International Publication No. 2018/061854 International Publication No. 2017/090740

However, it has been extremely difficult to prepare transparent water-based cosmetics when a large amount of poorly water-soluble components or water-soluble components such as oil are blended. For example, when forming micelles from nonionic surfactants, the size of the micelles is usually very small, about 10 to 20 nm, and there may not be enough space for oil to be taken into the micelles, resulting in insufficient transparency. .

There are also problems with technology using liposomes. Liposomes have a size on the order of 100 nm, which is larger than micelles, and it is possible to incorporate more various components into the liposome membrane. However, the transparency decreases depending on the particle size of the liposome, and especially when it is formulated into a low viscosity lotion formulation, the storage stability is poor.

Therefore, an object of the present invention is to provide a skin cosmetic composition that has excellent transparency and storage stability when various ingredients are blended therein.

As a result of intensive studies to achieve the above object, the present inventors discovered that phospholipids, salts of acylamino acids having a specific acylamino acid structure, specific fatty acid polyglyceryls, specific fatty acid monoglyceryls, and water. It has been found that a skin cosmetic composition containing disk-shaped micelles has excellent transparency and storage stability when various ingredients are blended. The present invention was completed based on these findings.

That is, the present invention provides a skin cosmetic composition containing the following component A, the following component B, the following component C, the following component D, and the following component E, and including disc-shaped micelles.
Component A: Phospholipid Component B: An acylamino acid structure in which one or more acyl group moieties selected from the group consisting of cocoyl group, lauroyl group, and myristoyl group and an amino acid moiety that is glutamic acid and/or aspartic acid are bonded. Component C: A fatty acid polyglyceryl ester of a fatty acid having 8 to 18 carbon atoms and polyglycerin, and the average degree of polymerization of polyglycerin is 10. Component D: An ester of a fatty acid having 8 to 12 carbon atoms and glycerin. Fatty acid monoglyceryl ester Component E: Water

Preferably, the component B is the following component B1, the component C is the following component C1, and the component D is the following component D1.
Component B1: Acyl amino acid salt selected from the group consisting of cocoyl glutamate, lauroyl glutamate, myristoyl glutamate, cocoyl aspartate, lauroyl aspartate, myristoyl aspartate, and dilauroyl glutamate lysine salt Component C1: Laurin One or more selected from the group consisting of polyglyceryl acid-10, polyglyceryl myristate-10, polyglyceryl palmitate-10, polyglyceryl stearate-10, polyglyceryl caprylate-10, polyglyceryl caprate-10, and polyglyceryl oleate-10. Component D1: One or more fatty acid monoglyceryl selected from the group consisting of monoglyceryl laurate, monoglyceryl caprylate, and monoglyceryl caprate.

The mass ratio of component C to the total amount of component A and component C [A/(A+C)] is preferably 0.04 to 0.3.

The mass ratio of component D to the total amount of component A and component C [D/(A+C)] is preferably 0.15 to 2.0.

The mass ratio of component B to the total amount of component A and component C [B/(A+C)] is preferably 0.3 to 4.0.

It is preferable that the skin cosmetic composition further contains the following component F.
Component F: Oily component

It is preferable that the skin cosmetic composition further contains the following component G.
Component G: Linear or branched higher alcohol

Further, the present invention provides a skin cosmetic composition containing the above composition for skin cosmetic composition.

According to the skin cosmetic composition of the present invention, when various ingredients are blended, the composition has excellent transparency and storage stability. Therefore, even when a relatively large amount of various components such as oil and other poorly water-soluble components are blended, the composition for skin cosmetics has excellent transparency and storage stability.

The skin cosmetic composition of the present invention comprises a phospholipid; one or more acyl group moieties selected from the group consisting of a cocoyl group, a lauroyl group, and a myristoyl group; and an amino acid moiety that is glutamic acid and/or aspartic acid. Salt of acylamino acid having a bonded acylamino acid structure; fatty acid polyglyceryl which is an ester of a fatty acid with 8 to 18 carbon atoms and polyglycerin, and the average degree of polymerization of polyglycerin is 10; fatty acid with 8 to 12 carbon atoms and glycerin and water.

In this specification, phospholipid is defined as "component A," one or more acyl group moieties selected from the group consisting of cocoyl group, lauroyl group, and myristoyl group, and an amino acid moiety that is glutamic acid and/or aspartic acid. A salt of an acylamino acid having an acylamino acid structure bonded with is called "component B", and a fatty acid polyglyceryl, which is an ester of a fatty acid having 8 to 18 carbon atoms and polyglycerin, and whose average degree of polymerization is 10, is called "component C". '', fatty acid monoglyceryl, which is an ester of a fatty acid having 8 to 12 carbon atoms and glycerin, is sometimes referred to as ``component D'', and water is sometimes referred to as ``component E''.

The skin cosmetic composition of the present invention may further contain an oily component. In addition, in this specification, the said oily component may be called "component F." Moreover, the skin cosmetic composition of the present invention may further contain a linear or branched higher alcohol. In addition, in this specification, the said linear or branched higher alcohol may be called "component G."

That is, the skin cosmetic composition of the present invention contains at least component A, component B, component C, component D, and component E. The skin cosmetic composition of the present invention may further contain component F and/or component G. Furthermore, the skin cosmetic composition of the present invention may contain components other than the above-mentioned components A to G. In addition, each component contained in the skin cosmetic composition of the present invention, such as component A, component B, component C, component D, component F, component G, and other components, is each a type of component. You may use only one, or two or more types may be used.

The skin cosmetic composition of the present invention contains disc-shaped micelles. The disc-shaped micelles have a disc-shaped lipid bilayer membrane structure (so-called bicelle structure) containing components A to D as constituent components. The disc-shaped micelles may form a spherical or columnar structure in which a plurality of disc-shaped micelles are stacked in a planar manner. The disc-shaped micelles have a particle size of about 20 to 100 nm, which is between a micelle and a liposome. The disc-shaped micelles can incorporate a water-based component or a sparingly water-soluble component such as an oily component into the structure of the disc-shaped micelle. Moreover, if the embodiment includes the disk-shaped micelles, transparency is also excellent. Furthermore, the skin cosmetic composition of the present invention may contain liposomes in addition to disc-shaped micelles.

[Component A]
Component A is a phospholipid. Component A is the main component forming the disk-shaped micelles. Component A may be used alone or in combination of two or more.

Component A is a complex lipid containing a phosphoric acid residue, such as natural phospholipids, synthetic phospholipids, and hydrogenated phospholipids in which the unsaturated carbon chains of naturally-derived phospholipids are saturated with hydrogen. Examples of the above-mentioned phospholipids include natural phospholipids such as phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylinositol, lysophosphatidylcholine, sphingomyelin, egg yolk lecithin, and soybean lecithin; Synthetic phospholipids such as stearoyl phosphatidylcholine, dioleoylphosphatidylcholine, and palmitoyl oleoylphosphatidylcholine; 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.

As component A, a commercially available product can be used. Commercial products of hydrogenated soybean lecithin include, for example, the product name "COATSOME NC-21", the product name "COATSOME NC-61" (manufactured by NOF Corporation), the product name "NIKKOL RESINOL S-10EX", Product name: "NIKKOL Resinol S-10E", Product name: "NIKKOL Resinol S-10M" (manufactured by Nikko Chemicals Co., Ltd.), Product name: "Basys LS-60HR" (manufactured by Nisshin Oilio Group Co., Ltd.), Product name: "phytopresome" OR'' and the product name ``phytopresome'' (manufactured by Nippon Fine Chemical Co., Ltd.).

In the skin cosmetic composition of the present invention, the mass ratio of component A to the total amount of component A and component C [A/(A+C)] is preferably 0.04 to 0.3, more preferably It is 0.04 to 0.2, more preferably 0.05 to 0.19, even more preferably 0.06 to 0.19, particularly preferably 0.07 to 0.18. When the mass ratio is 0.04 or more, disk-shaped micelles can be formed more stably. When the mass ratio is 0.3 or less, excess component A that does not form disk-shaped micelles is reduced, resulting in better transparency.

[Component B]
Component B is an acylamino acid having an acylamino acid structure in which one or more acyl group moieties selected from the group consisting of a cocoyl group, a lauroyl group, and a myristoyl group are bonded to an amino acid moiety that is glutamic acid and/or aspartic acid. It's salt. It is presumed that Component B partially enters the gap in the bilayer structure formed by Components A, C, and D, and repels Component B that does not enter the gap. The disk-shaped micelles can be made small in size, and the skin cosmetic composition has excellent transparency. Component B may be used alone or in combination of two or more.

Examples of the acyl amino acid structure include a cocoyl glutamic acid structure, a lauroyl glutamic acid structure, a myristoyl glutamic acid structure, a cocoyl aspartic acid structure, a lauroyl aspartic acid structure, and a myristoyl aspartic acid structure. Component B may have only one type of the above acyl amino acid structure, or may have two or more types. Further, in the acylamino acid structure, the acyl group portion may be bonded to only one carboxyl group of the amino acid portion, or may be bonded to two carboxyl groups.

The above acyl amino acid structure may have only one type of the above acyl group moiety and the above amino acid moiety, or may have two or more types of the above acyl group moiety and the above amino acid moiety.

The acylamino acid having the above-mentioned acylamino acid structure has, in addition to the above-mentioned acylamino acid structure, other acyl group moieties other than cocoyl group, lauroyl group, and myristoyl group, and other amino acid moieties other than glutamic acid and aspartic acid. Good too. Examples of the other amino acid moieties include lysine and the like.

The above other acyl group moieties may be bonded to glutamic acid and/or aspartic acid, or may be bonded to the above other amino acid moieties. Further, the above other amino acid moieties may be bonded to any of the cocoyl group, lauroyl group, myristoyl group, the above other acyl group moieties, glutamic acid, and aspartic acid.

The amino acid moiety (glutamic acid and/or aspartic acid) may be bonded to an amino acid such as glutamic acid, aspartic acid, the other amino acid mentioned above, or other acyl group amino acid structure in addition to the bond with the acyl group moiety mentioned above. good. Such acyl amino acids include dilauroylglutamic acid lysine and the like.

Component B is a salt of an acylamino acid, and the glutamic acid moiety and/or aspartic acid moiety in the above acyl amino acid structure may form a salt, or when it has the other amino acid moiety mentioned above, the other amino acid moiety mentioned above may form a salt. may form a salt. As the above-mentioned salt, an alkali metal salt is preferable, and a sodium salt and a potassium salt are more preferable.

Examples of component B include cocoyl glutamate, lauroyl glutamate, myristoyl glutamate, cocoyl aspartate, lauroyl aspartate, myristoyl aspartate, dilauroyl glutamate lysine salt, and the like. In addition, in this specification, one or more selected from the group consisting of cocoyl glutamate, lauroyl glutamate, myristoyl glutamate, cocoyl aspartate, lauroyl aspartate, myristoyl aspartate, and dilauroyl glutamate lysine salt. The acyl amino acid salt may be referred to as "component B1". Among component B, component B1 is particularly preferred.

More specifically, component B1 includes, for example, sodium cocoyl glutamate, potassium cocoyl glutamate, sodium lauroyl glutamate, potassium lauroyl glutamate, sodium myristryl glutamate, potassium myristoyl glutamate, sodium cocoyl aspartate, potassium cocoyl aspartate, lauroyl asparagine. Examples include sodium acid, potassium lauroyl aspartate, sodium myristoyl aspartate, potassium myristoyl aspartate, sodium lysine dilauroyl glutamate, potassium lysine dilauroyl glutamate, and the like.

In the skin cosmetic composition of the present invention, the mass ratio of component B to the total amount of component A and component C [B/(A+C)] is preferably 0.3 to 4.0, more preferably 0.3 to 2.2, more preferably 0.4 to 2.1, particularly preferably 0.5 to 2.0. When the mass ratio is 0.3 or more, the disk-shaped micelles formed can be made smaller in size, and the skin cosmetic composition has better transparency. When the mass ratio is 4.0 or less, foaming and clouding of the skin cosmetic composition can be made less likely to occur.

[Component C]
Component C is an ester of a fatty acid having 8 to 18 carbon atoms and polyglycerin, and is a fatty acid polyglyceryl having an average degree of polymerization of polyglycerin of 10. Component C has a large polarity difference from component A, mainly forms the edges of the disk-shaped micelles, increases the curvature of the bilayer membrane structure, and can reduce the size of the disk-shaped micelles. It also has excellent low irritation to the skin. Component C may be used alone or in combination of two or more.

The number of carbon atoms in the fatty acid in component C is 8 to 18, preferably 8 to 16. When the number of carbon atoms is within the above range, the disc-shaped micelles can be made small in size. Note that the number of carbon atoms in the fatty acids in component C is the total number of carbon atoms in the fatty acids in component C. The fatty acid mentioned above may be a saturated fatty acid or an unsaturated fatty acid.

Examples of component C include polyglyceryl-10 laurate, polyglyceryl-10 myristate, polyglyceryl-10 palmitate, polyglyceryl-10 stearate, polyglyceryl-10 caprylate, polyglyceryl-10 caprate, and polyglyceryl-10 oleate. Can be mentioned. In addition, in this specification, from polyglyceryl-10 laurate, polyglyceryl-10 myristate, polyglyceryl-10 palmitate, polyglyceryl-10 stearate, polyglyceryl-10 caprylate, polyglyceryl-10 caprate, and polyglyceryl-10 oleate. One or more fatty acid polyglyceryl selected from the group consisting of: may be referred to as "component C1". Among component C, component C1 is preferred.

The total proportion of component A and component C in the skin cosmetic composition of the present invention is preferably 0.0001 to 10.0% by mass based on 100 mass% of the total amount of the skin cosmetic composition of the present invention. , more preferably 0.0005 to 8.0% by mass, and still more preferably 0.001 to 6.0% by mass. When the above-mentioned total proportion is 0.0001% by mass or more, disk-shaped micelles are formed in a sufficient amount, resulting in better transparency and storage stability. When the total ratio is 10.0% by mass or less, excess components A and C that do not form disk-shaped micelles are reduced, resulting in better transparency.

[Component D]
Component D is a fatty acid monoglyceryl which is an ester of a fatty acid having 8 to 12 carbon atoms and glycerin. Component D has a large polarity difference with component A, and is assumed to penetrate between component C and strengthen the edge by increasing the density of the edge, mainly at the edge of the disk-shaped micelle membrane formed by component C. It stabilizes disc-shaped micelles and has excellent storage stability. It also has excellent low irritation to the skin. Component D may be used alone or in combination of two or more.

Examples of component D include monoglyceryl laurate, monoglyceryl caprylate, and monoglyceryl caprate. In this specification, one or more fatty acid monoglyceryl selected from the group consisting of monoglyceryl laurate, monoglyceryl caprylate, and monoglyceryl caprate may be referred to as "component D1." Among these, component D is preferably component D1.

In the skin cosmetic composition of the present invention, the mass ratio [D/(A+C)] of component D to the total amount of component A and component C is preferably 0.15 to 2.0, more preferably 0.3 to 2.0, more preferably 0.35 to 1.95, particularly preferably 0.4 to 1.9. When the mass ratio is 0.15 or more, the disk-shaped micelles are more stabilized and have better storage stability. When the mass ratio is 2.0 or less, thickening of the skin cosmetic composition can be suppressed.

[Component E]
Component E is water. Component E is the matrix of the dermocosmetic composition of the present invention. Also, by including component E. The composition for skin cosmetics of the present invention can be given a fresh and refreshing feel, 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 preferably 30.0 to 99.0% by mass, more preferably is 35.0 to 95.0% by mass, more preferably 40.0 to 90.0% by mass.

[Component F]
Component F is an oily component. Examples of component F include vegetable oils, ester oils, silicone oils, hydrocarbon oils, waxes, higher fatty acids, and higher alcohols other than component G. By containing the disc-shaped micelles, the skin cosmetic composition of the present invention can contain a large amount of component F. In the skin cosmetic composition of the present invention, component F can be used as an emollient component that prevents evaporation of water from the skin and softens the stratum corneum. Component F may be used alone or in combination of two or more. Note that component F does not include anything that corresponds to component G.

Examples of the above-mentioned vegetable oils include macadamia nut oil, eucalyptus oil, coconut oil, avocado oil, safflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, shea butter, cocoa butter, almond oil, and sunflower oil. , rosehip oil, olive squalane, camellia oil, kiwifruit 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, rose flower wax, camellia oil, hydrogenated substances thereof (e.g., hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated avocado oil, hydrogenated soybean oil, etc.).

Examples of the above ester oil include ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, 2-ethylhexyl palmitate, octyldodecyl myristate, isopropyl isostearate, propylene glycol isostearate, 2- Cetyl ethylhexanoate, glyceryl tri-2-ethylhexanoate, glyceryl tri(caprylic/capric acid), isononyl isononanoate, diisopropyl adipate, pentaerythrityl tetraethylhexanoate, pentaerythrityl tetraoctanoate, pentaerythrityl tetraisostearate Trit, diisostearyl malate, erythrityl triethylhexanoate, 2-ethylhexyl hydroxystearate, dipentaerythrityl hexa(hydroxystearic acid/stearic acid/rosin acid), dipentaerythrityl tetra(hydroxystearic acid/isostearate), dipentaerythrityl hexahydroxystearate , (ethylhexanoic acid/stearic acid/adipic acid) glyceryl, tri(caprylic acid/capric acid/myristic acid/stearic acid) glyceryl, hexa(behenic acid/benzoic acid/ethylhexanoic acid) dipentaerythrityl, alkyl benzoate (C12-) 15), etc.

The silicone oil is not particularly limited, but includes, for example, dimethylsilicone oil such as methylpolysiloxane and highly polymerized methylpolysiloxane; methylphenylsilicone oil such as methylphenylpolysiloxane; methylcyclopolysiloxane, octamethylcyclotetrasiloxane, Cyclic silicone oils such as decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane; aminopropylmethylsiloxane/dimethylsiloxane copolymer, aminoethylaminopropylsiloxane/dimethylsiloxane copolymer, aminoethylaminopropylmethylsiloxane/dimethylsiloxane copolymer Amino-modified silicones such as polymers, carboxy-modified silicones, fatty acid-modified silicones, alcohol-modified silicones, aliphatic alcohol-modified silicones, epoxy-modified silicones, fluorine-modified silicones, alkyl-modified silicones, and other modified silicones; methyl hydrogen polysiloxane, dimethiconol, etc. can be 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, hydrogenated polyisobutene, hydrogenated (tetradecenyl/ Methylpentadecene), isododecane, etc.

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 component G include higher alcohols having an alicyclic ring such as sterols.

Component F preferably contains a component having a sterol skeleton, and more preferably contains a sterol and/or sterol ester. It is presumed that the above sterols and sterol esters adjust the curvature of the bilayer membrane structure, thereby contributing to the stabilization of the bicelle structure. It is also added as an active ingredient to improve the skin's barrier function. Examples of sterols and/or sterol esters include animal sterols, plant sterols (phytosterols), and examples include cholesterol, cholestanol, 7-dehydrocholesterol, sitosterol, stigmasterol, fucosterol, spinasterol, and brassicasterol. , γ oryzanol, and the like.

The mass ratio [F/(A+C)] of component F to the total amount of component A and component C in the skin cosmetic composition of the present invention is not particularly limited, but is preferably 0.01 or more, more preferably It is 0.02 or more. The mass ratio is preferably 1.0 or less, more preferably 0.8 or less, still more preferably 0.5 or less. When the mass ratio is within the above range, storage stability is further improved. Note that component F is an optional component and may not be included. That is, the mass ratio [F/(A+C)] may be zero.

[Component G]
Component G is a linear or branched higher alcohol. When component G is included, the crystallinity of the disk-shaped micelles is lowered and storage stability is improved. Component G may be used alone or in combination of two or more.

Component G is preferably a monohydric aliphatic alcohol having 12 to 24 carbon atoms, more preferably a monohydric aliphatic alcohol having 14 to 22 carbon atoms.

Examples of linear higher alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, and behenyl alcohol. Examples of the branched higher alcohol include octyldodecanol, decyltetradecanol, isostearyl alcohol, and the like. Among these, branched higher alcohols are preferred, and octyldodecanol and decyltetradecanol are more preferred, from the viewpoint of superior storage stability.

The mass ratio of component G to the total amount of components A and C in the skin cosmetic composition of the present invention [G/(A+C)] is not particularly limited, but is preferably 0.01 or more, more preferably It is 0.02 or more. When the mass ratio is 0.01 or more, storage stability is better. The mass ratio is preferably 1.0 or less, more preferably 0.7 or less, still more preferably 0.5 or less. When the mass ratio is 1.0 or less, transparency is better.

The skin cosmetic composition of the present invention may contain a 1,2-alkanediol having 5 to 10 carbon atoms from the viewpoint of improving antiseptic properties. In this specification, the above-mentioned "1,2-alkanediol having 5 to 10 carbon atoms" may be referred to as "component H." Component H may be used alone or in combination of two or more.

Component H includes, for example, 1,2-pentanediol (pentylene glycol), 1,2-hexanediol, 1,2-heptanediol, 1,2-octanediol (caprylyl glycol), 1,2-decane Examples include diol. Among them, 1,2-pentanediol (pentylene glycol) is preferred.

[Other ingredients]
The skin cosmetic composition of the present invention may further contain components other than the above-mentioned components A to H. The other components mentioned above are not particularly limited, but include, for example, surfactants other than component B (cationic surfactants, anionic surfactants, nonionic surfactants, amphoteric surfactants, etc.), lower alcohols, polyhydric alcohols, etc. , UV absorbers, powders, antioxidants, preservatives, fragrances, colorants, chelating agents, refreshing agents, thickeners, vitamins, neutralizing agents, amino acids, pH adjusters, whitening agents, anti-inflammatory agents, Examples include additives such as deodorants, animal and plant extracts, and metal ion sequestrants. The above-mentioned other components may be used alone or in combination of two or more.

A preferred embodiment of the skin cosmetic composition of the present invention includes components A to E, component G, and component H, and the content of component B is 100% by mass of the total amount of the skin cosmetic composition of the present invention. 2.0 to 10.0% by mass (preferably 4.0 to 10.0% by mass).

From the aesthetic point of view, the skin cosmetic composition of the present invention preferably has a transparent appearance. Furthermore, the high transparency of the skin cosmetic composition of the present invention means that the blended oily components do not aggregate or cream, indicating that it is in a very stable state. Therefore, the transparency of the skin cosmetic composition of the present invention also serves as an indicator of storage stability.

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

The viscosity of the skin cosmetic composition of the present invention is not particularly limited, but for example, the viscosity at 25°C is preferably 0.5 to 1000 mPa·s, and preferably 0.5 to 500 mPa·s. More preferred. The viscosity measurement is carried out using a B-type viscometer, selecting a rotor that matches the viscosity, and rotating at a rotation speed of 60 r/min.

The average particle diameter of the disc-shaped micelles 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 still more preferably 40 nm or more. When the average particle diameter is 20 nm or more, it is possible to secure space for taking in various components (component F, water-soluble components, etc.) within the disk-shaped micelles. The average particle diameter is preferably 100 nm or less, more preferably 90 nm or less, even more preferably 80 nm or less. When 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).

The skin cosmetic composition of the present invention can be prepared by mixing the above components and stirring using a known method, for example, using a homomixer.

Furthermore, skin cosmetics such as lotions can be produced by mixing the composition for skin cosmetics of the present invention with ingredients used in 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 production of skin cosmetics. By using the composition for skin cosmetics of the present invention, it is possible to stably disperse it even in aqueous or low-viscosity dispersion media, so that various ingredients such as components that are poorly soluble in water such as component F can be used in skin cosmetics. It can be incorporated into. Moreover, the composition for skin cosmetics of the present invention can also be used as a skin cosmetic by itself.

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

The dosage form of the skin cosmetic composition (or skin cosmetic) of the present invention is not particularly limited, but includes, for example, lotion, cream, gel, milky lotion, aerosol spray, natural spray, stick, powder, Various dosage forms such as roll-on and sheet (paper) can be mentioned. Among these, lotions, creams, gels, and emulsions are preferred, and lotions are more preferred.

The composition for skin cosmetics (or skin cosmetics) of the present invention is not particularly limited, but includes, for example, moisturizing cosmetics, whitening cosmetics, acne care cosmetics, anti-aging cosmetics (e.g. wrinkle suppressing, sagging suppressing Scalp care cosmetics (e.g., aimed at moisturizing, sebum control, etc.); Deodorant cosmetics; Sunscreen cosmetics; Shaving cosmetics; Body cleansers (e.g., Examples include body shampoo, bar soap, etc.) for the scalp. Among these, the composition for skin cosmetics (or skin cosmetics) of the present invention is preferably a skin care cosmetic or a scalp care cosmetic, and more preferably 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 areas to which the skin cosmetic composition (or skin cosmetic) of the present invention is applied are not particularly limited, and include the face (for example, the forehead, the area around the eyes, the corners of the eyes, the cheeks, the mouth, etc.), the arms, the elbows, the backs of the hands, and the fingertips. , feet, knees, heels, neck, armpits, back, scalp, etc.

The skin cosmetic composition of the present invention is a skin cosmetic composition using water (component E) as a medium, which contains phospholipids (component A), a cocoyl group, a lauroyl group, and a myristoyl group. A salt of an acylamino acid having an acylamino acid structure in which one or more acyl group moieties are bonded to an amino acid moiety of glutamic acid and/or aspartic acid (component B), an ester of a fatty acid having 8 to 18 carbon atoms and polyglycerin It contains fatty acid polyglyceryl (component C) whose average degree of polymerization of polyglycerin is 10, and fatty acid monoglyceryl (component D) which is an ester of a fatty acid having 8 to 12 carbon atoms and glycerin. The disc-shaped micelles in the skin cosmetic composition of the present invention are composed of component A, component B, component C, and component D. Although the role of each of the above components is not completely understood, it is presumed that component C and component D adjust the curvature of the disc-shaped micelle, and component B contributes to the stability of the disc-shaped micelle. The stability of disc-shaped micelles is particularly improved. Due to the above mechanism, the skin cosmetic composition of the present invention can be used not only when a small amount of various ingredients such as oil and other water-insoluble ingredients are blended, but also when a relatively large amount is blended. Although it is a water-based skin cosmetic composition, it can have excellent transparency and storage stability.

The present invention will be explained in more detail below based on Examples, but the present invention is not limited only to these Examples. The blending amounts listed in the table are the blending amounts of each component (that is, the blending amount of the active ingredient in each raw material, the so-called pure content), and are expressed in "mass %" unless otherwise specified.

Examples 1 to 31, Comparative Examples 1 to 9
Using each component shown in the table, skin cosmetic compositions of Examples and Comparative Examples were prepared in a conventional manner.

(evaluation)
The skin cosmetic compositions obtained in Examples and Comparative Examples were evaluated as follows. The evaluation results are listed in the table.

(1) Transparency Immediately after preparation, 50 g of the skin cosmetic compositions of each Example and Comparative Example were placed in a screw tube and visually observed. Transparency was then evaluated according to the following evaluation criteria.
<Transparency evaluation criteria>
○ (Good): Clear and clear with no turbidity.
△ (Acceptable): Cloudy, but transparent, and the other side of the screw tube can be seen through.
× (Poor): There is turbidity and it is not possible to see through the other side of the screw tube.

(2) Storage Stability 50 g of the skin cosmetic compositions of each Example and Comparative Example were placed in a screw tube and stored in a thermostat at 5° C. for 14 days. The appearance of the screw tube of each skin cosmetic composition after storage was visually observed, and the storage stability was evaluated according to the following evaluation criteria.
<Evaluation criteria for storage stability>
○ (Good): No separation, precipitate, or lees observed.
× (Poor): Separation, precipitates, or lees observed.

(3) Confirmation of disk-shaped micelles When the skin cosmetic compositions of Examples 1, 8, 23, 26, and 28 were observed using a transmission electron microscope, disk-shaped micelles were observed.

All of the skin cosmetic compositions (Examples) of the present invention were evaluated to be excellent in transparency and storage stability. In addition, it was confirmed that disc-shaped micelles were formed in the skin cosmetic compositions of Examples 1, 8, 23, 26, and 28, and disc-shaped micelles were also formed in other Examples. is estimated. On the other hand, all of Comparative Examples 1 to 9 lacking components A, B, or C, which are the main constituents of the disc-shaped micelles, were evaluated to have poor transparency.

Furthermore, a formulation example of the skin cosmetic composition of the present invention will be shown.
Formulation example 1 Lotion hydrogenated lecithin 0.5% by mass
Monoglyceryl caprylate 2.0% by mass
Polyglyceryl myristate-10 4.0% by mass
γ oryzanol 0.05% by mass
Octyldodecanol 0.5% by mass
Potassium lauroyl glutamate 1.5% by mass
Purified water balance citric acid 0.05% by mass
Sodium citrate 0.15% by mass
1,3-BG 8.0% by mass
Total 100.0% by mass

Formulation example 2 Moisturizing cream hydrogenated lecithin 0.5% by mass
Monoglyceryl caprylate 1.5% by mass
Polyglyceryl myristate-10 4.0% by mass
Sodium myristoyl aspartate 2.0% by mass
Octyldodecanol 0.5% by mass
Phytosterols 0.05% by mass
Purified water, balance glyceryl monostearate 1.0% by mass
Polyglyceryl stearate 1.0% by mass
Squalane 5.0% by mass
Xanthan gum 0.2% by mass
Total 100.0% by mass

Claims (8)

A skin cosmetic composition containing the following component A, the following component B, the following component C, the following component D, and the following component E, and including disc-shaped micelles.
Component A: Phospholipid Component B: An acylamino acid structure in which one or more acyl group moieties selected from the group consisting of cocoyl group, lauroyl group, and myristoyl group and an amino acid moiety that is glutamic acid and/or aspartic acid are bonded. Component C: A fatty acid polyglyceryl ester of a fatty acid having 8 to 18 carbon atoms and polyglycerin, and the average degree of polymerization of polyglycerin is 10. Component D: An ester of a fatty acid having 8 to 12 carbon atoms and glycerin. Fatty acid monoglyceryl ester Component E: Water The skin cosmetic composition according to claim 1, wherein component B is component B1 below, component C is component C1 below, and component D is component D1 below.
Component B1: One or more acylamino acid salts selected from the group consisting of cocoyl glutamate, lauroyl glutamate, myristoyl glutamate, cocoyl aspartate, lauroyl aspartate, myristoyl aspartate, and dilauroyl glutamate lysine salt Component C1: selected from the group consisting of polyglyceryl-10 laurate, polyglyceryl-10 myristate, polyglyceryl-10 palmitate, polyglyceryl-10 stearate, polyglyceryl-10 caprylate, polyglyceryl-10 caprate, and polyglyceryl-10 oleate. Component D1: One or more fatty acid monoglyceryl selected from the group consisting of monoglyceryl laurate, monoglyceryl caprylate, and monoglyceryl caprate. The composition for skin cosmetics according to claim 1 or 2, wherein the mass ratio [A/(A+C)] of component C to the total amount of component A and component C is 0.04 to 0.3. The skin cosmetic composition according to any one of claims 1 to 3, wherein the mass ratio [D/(A+C)] of component D to the total amount of component A and component C is 0.15 to 2.0. . The skin cosmetic composition according to any one of claims 1 to 4, wherein the mass ratio [B/(A+C)] of component B to the total amount of component A and component C is 0.3 to 4.0. . The skin cosmetic composition according to any one of claims 1 to 5, further comprising the following component F.
Component F: Oily component The skin cosmetic composition according to any one of claims 1 to 6, further comprising the following component G.
Component G: Linear or branched higher alcohol A skin cosmetic comprising the skin cosmetic composition according to any one of claims 1 to 7.