JP6815163B2 - Skin cosmetics - Google Patents

Description

The present invention relates to skin cosmetics.

For the purpose of protecting the skin from the external environment such as dryness and physical irritation, and moisturizing the skin to make it soft and youthful, use polyols such as glycerin, various oils, and moisturizers such as amino acids and hyaluronic acid. Blended cosmetics have been developed. These cosmetics protect the skin from external stimuli by applying an emulsified layer containing oil and water on the skin, prevent the evaporation of water from the inside of the skin, and provide a certain amount of water to the skin. By giving, it contributes to the improvement of rough skin and dry skin.

On the other hand, cosmetics containing an intercellular lipid component such as ceramide and having a lamellar structure similar to the intercellular lipid have been proposed (Non-Patent Document 1 and Patent Document 1).
However, when an amphipathic solid fat having a high melting point such as ceramide is blended in an oil-in-water emulsion, the emulsion is likely to separate or gel over time, and it is difficult to blend the emulsion stably. Therefore, there are high restrictions on the manufacturing method and prescription.

Further, since ceramide is easily crystallized, a method of using a large amount of emulsifier for ceramide has been proposed (Patent Documents 2 and 3), but there is also a problem that it does not fit well on the skin when used.
In addition, since ceramide itself is expensive, there is a problem in terms of versatility.

On the other hand, as a technique for forming a lamellar structure without using ceramide or the like, a technique using a fatty acid arginine salt is known (Non-Patent Document 2). In addition, cosmetics in which a higher alcohol or a surfactant is combined with a fatty acid arginine salt have also been studied (for example, Patent Document 4). Furthermore, by blending higher fatty acids, higher alcohols, organic bases, inorganic bases, oils and water in a certain amount ratio, a cosmetic coating film having a lamellar structure is formed on the skin surface, and it has high moisturizing properties and gloss. , Skin cosmetics having excellent storage stability have also been reported (Patent Document 5).

Japanese Unexamined Patent Publication No. 6-345633 Japanese Unexamined Patent Publication No. 2003-12486 Japanese Unexamined Patent Publication No. 7-223934 JP-A-2007-9199 Japanese Unexamined Patent Publication No. 2016-500051

The journal of investigative dermatology, vol. 96 (6), 845-851 (1991) J. Oleo. Sci., Vol.54 (6), 325-333 (2005)

However, it cannot be said that the moisturizing property of the skin cosmetics forming the lamellar structure is sufficiently satisfactory, and there is room for improvement in terms of usability such as stickiness of the coating film, and a good usability is maintained. I was not satisfied with the sex.
Therefore, the subject of the present invention is a skin cosmetic that forms a coating film having a lamellar structure, and has a high moisturizing property and a good feeling of use, and the skin having a long-lasting moisturizing property and a feeling of use. It is to provide cosmetics.

Therefore, the present inventor forms a cosmetic coating film having a lamellar structure on the skin surface by containing a highly polymerized silicone in a specific amount ratio in addition to a higher fatty acid, a higher alcohol, an organic base, an inorganic base and water. Not only does it have high moisturizing properties, but it also gives an unexpected feeling of use, which is an excellent smoothness, and it is possible to obtain skin cosmetics that have the characteristics that the moisturizing properties and smoothness are not easily reduced by friction or water. The heading, the present invention was completed.

That is, in the present invention, the following components (A) to (F):
(A) Linear saturated fatty acids having 12 to 22 carbon atoms,
(B) Organic base,
(C) Inorganic base,
(D) A linear saturated alcohol having 12 to 22 carbon atoms,
Contains (E) highly polymerized silicone and (F) water,
The total amount of the components (A) and (D) is (A) + (D) = 1 to 12% by mass.
The mass ratio of the component (A) to the total amount [(A) + (D)] of the components (A) and (D) is (A) / [(A) + (D)] = 0.2 to 0. 7 and
The molar ratio of the component (B) to the total amount of the components (B) and (C) [(B) + (C)] is (B) / [(B) + (C)] = 5 to 60 mol%. Yes,
The molar ratio of the total amount [(B) + (C)) of the components (B) and (C) to the component (A) is [(B) + (C)] / (A) = 10 to 80 mol%. It provides skin cosmetics.

When the skin cosmetic of the present invention is used, a cosmetic coating film having a lamellar structure is formed on the skin surface, and not only has high moisturizing property, but also an unexpected feeling of use such as excellent smoothness can be obtained. The smoothness is hard to be reduced by friction and water, and it lasts.

The skin cosmetic of the present invention has a lamellar structure, and is characterized by having two types of lamellar structures. One is a lamella having a spherical structure (hereinafter referred to as a concentric lamella), and the other is a lamella formed as a continuous phase in a cosmetic (hereinafter referred to as a bulk lamella), which is contained in the bulk lamella. In addition, it has a great feature that concentric lamella coexists like a sea island. This coexistence state of bulk lamella and concentric lamella also exists for a long time in the film on the skin formed after application to the skin. On the other hand, many conventional cosmetics have only one lamellar structure, or the lamellar disappears in the film after application. Therefore, it is considered that such a structure and characteristics of the lamella contribute to the excellent effect of the present invention that it has a water-blocking property, does not become slimy at the time of application, can be applied uniformly to the skin, and can be blended. .. High water obstruction means excellent moisturizing sustainability. Bulk lamella and concentric lamella can be confirmed with a polarizing microscope (sample thickness: 25 mm). That is, the presence of bulk lamella is indicated by the appearance of shining as a whole, and the presence of concentric lamella is indicated by the appearance of martese cloth.

(A) Linear saturated fatty acid having 12 to 22 carbon atoms:
The component (A) used in the present invention is a linear saturated fatty acid having 12 to 22 carbon atoms, and examples thereof include lauric acid, myristic acid, palmitic acid, stearic acid, and behic acid. Of these, linear saturated fatty acids having 14 to 22 carbon atoms are preferable, linear saturated fatty acids having 16 to 22 carbon atoms are more preferable, and at least one selected from palmitic acid and stearic acid is cosmetic. It is more preferable from the viewpoint of forming a stable lamella-like structure in the material and from the viewpoint of forming bulk lamella and concentric lamella as the lamella. Furthermore, stearic acid is more preferable from the viewpoint of stability of the lamellar structure and from the viewpoint of forming concentric lamella with bulk lamella as the lamella.

As the component (A), one type or two or more types can be used, and by neutralizing with the components (B) and (C) described later, a lamellar structure can be formed in the cosmetic. Therefore, the component (A) exists as a fatty acid or a salt thereof in cosmetics, but in the present invention, the content of the component (A) is an amount converted into a fatty acid.

In the skin cosmetic of the present invention, from the viewpoint of improving the moisturizing property, the component (A) preferably contains two or more kinds of linear saturated fatty acids having 12 to 22 carbon atoms having two or more different carbon atoms. ..
By containing two or more kinds of linear saturated fatty acids having two or more carbon atoms different from each other in the skin cosmetic, the lamellar structure is improved in denseness, the obstructiveness is increased, that is, the moisturizing property is improved. It is thought that.
Of the two or more types of linear saturated fatty acids having two or more different carbon atoms, the carbon of the linear saturated fatty acid having 12 to 22 carbon atoms (also referred to as the high carbon number saturated fatty acid in the present invention) has the larger carbon number. The number is preferably 14 to 22, more preferably 16 to 20, and even more preferably 18 from the viewpoint of improving the moisturizing property. Further, the linear saturated fatty acid having 12 to 22 carbon atoms (also referred to as low carbon number saturated fatty acid in the present invention) having a smaller carbon number is preferably 12 to 20 carbon atoms from the same viewpoint, and more. It is preferably 12 to 18, and more preferably 14 to 16.
Further, from the same viewpoint, when the component (A) contains two or more kinds of linear saturated fatty acids having two or more different carbon atoms, at least the linear saturated fatty acids having 16 or 18 carbon atoms, that is, palmitic acid. It preferably contains an acid or stearic acid, more preferably at least 18 linear saturated fatty acids, i.e. stearic acid.
The mass ratio of stearic acid contained in the component (A) is preferably 0.2 to 0.8, more preferably 0.4 to 0.6, from the viewpoint of improving the moisturizing property.

The content of the component (A) is 0.5% by mass or more in the total composition from the viewpoint of forming a stable lamellar structure in the cosmetic and from the viewpoint of forming bulk lamella and concentric lamella as the lamella. Is more preferable, 1.5% by mass or more is more preferable, 2.0% by mass or more is further preferable, 6% by mass or less is preferable, 4% by mass or less is more preferable, and 3.5% by mass or less is further preferable. The content of the component (A) is preferably 0.5 to 6% by mass, more preferably 1.5 to 4% by mass, and even more preferably 2.0 to 3.5% by mass in the total composition.

(B) Organic base:
The component (B) used in the present invention is an organic base, and examples thereof include alkylamines, alkanolamines, and basic amino acids. Preferred examples thereof include an alkylamine having an alkyl group having 1 to 6 carbon atoms, an alkanolamine having an alkyl group having 1 to 6 carbon atoms, and a basic amino acid. The component (B) functions as a neutralizer for the component (A).
Specifically, examples of alkylamines include methylamine, ethylamine, propylamine, butylamine, hexylamine, dimethylamine, diethylamine and the like. Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, N-methyl-diethanolamine, N, N-dimethylmonoethanolamine, aminomethylpropanol and the like, and aminomethylpropanol is preferable. Examples of the basic amino acid include lysine, histidine, arginine and the like, and arginine is preferable. Among arginines, L-arginine is preferable.
Of these, the viewpoint of neutralizing the component (A) and forming a stable lamella-like structure in the cosmetic, the viewpoint of forming bulk lamella and concentric lamella as the lamella, and enhancing the moisturizing property. From the viewpoint, an alkanolamine having an alkyl group having 1 to 6 carbon atoms or a basic amino acid having 1 to 6 carbon atoms is preferable, and an alkanolamine having an alkyl group having 3 to 6 carbon atoms or a basic amino acid having 3 to 6 carbon atoms is preferable. Is more preferred, basic amino acids are even more preferred, aminomethylpropanol or arginine is even more preferred, and arginine is even more preferred. Among arginines, L-arginine is preferable.

As the component (B), at least one or two or more selected from the above-mentioned organic bases can be used, and from the viewpoint of enhancing the stability of the lamellar structure of the skin cosmetic and the viewpoint of enhancing the moisturizing property, the component (A) On the other hand, the molar ratio of the component (B) is preferably 5 mol% or more, more preferably 10 mol% or more, further preferably 15 mol% or more, still more preferably 30 mol% or more, and 80. It is preferably mol% or less, more preferably less than 80 mol%, still more preferably 60 mol% or less.
The content of the component (B) is preferably 0.01% by mass or more, more preferably 0.02% by mass or more in the entire composition from the viewpoint of enhancing the stability of the lamellar structure of the skin cosmetic and enhancing the moisturizing property. , 0.1% by mass or more, more preferably 1% by mass or less, more preferably 0.8% by mass or less, still more preferably 0.4% by mass or less. The content of the component (B) is preferably 0.01 to 1% by mass, more preferably 0.02 to 0.8% by mass, still more preferably 0.1 to 0.4% by mass in the total composition. ..
The component (B) can form a salt with the component (A) and other acids in cosmetics, but in the present invention, the content of the component (B) is an amount converted into an organic base. is there.

(C) Inorganic base:
The component (C) used in the present invention is an inorganic base, and examples thereof include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide. The component (C) functions as a neutralizer for the component (A).
Of these, alkali metal hydroxide from the viewpoint of neutralizing the component (A) and forming a stable lamella-like structure in the cosmetic, and from the viewpoint of forming bulk lamella and concentric lamella as the lamella. The material is preferable, sodium hydroxide and potassium hydroxide are more preferable, and sodium hydroxide is further preferable.

As the component (C), at least one or two or more selected from the above-mentioned inorganic groups can be used, and from the viewpoint of enhancing the stability of the lamellar structure of the skin cosmetic and enhancing the moisturizing property, the component (C) is compared with the component (A). The molar ratio of the component (C) is preferably 5 mol% or more, more preferably 10 mol% or more, further preferably 15 mol% or more, more preferably 30 mol% or more, and 80 mol%. The following is preferable, less than 80 mol% is more preferable, and 60 mol% or less is further preferable.
The content of the component (C) is preferably 0.01% by mass or more, more preferably 0.05% by mass or more in the total composition from the viewpoint of enhancing the stability of the lamellar structure of the skin cosmetic and enhancing the moisturizing property. , 0.1% by mass or more, more preferably 1% by mass or less, more preferably 0.3% by mass or less, still more preferably 0.2% by mass or less. The content of the component (C) is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.3% by mass, still more preferably 0.1 to 0.2% by mass in the total composition. ..
The component (C) can form a salt with the component (A) and other acids in cosmetics, but in the present invention, the content of the component (C) is an amount converted into an inorganic base. is there.

In the present invention, the molar ratio of the component (B) to the total amount [(B) + (C)] of the components (B) and (C) {(B) / [(B) + (C)]} is water. From the viewpoint of forming a film having excellent obstructive properties, (B) / [(B) + (C)] = 5 to 60 mol%, preferably 8 to 50 mol%, and more preferably 10 to 45 mol%. 15-40 mol% is more preferable.

Further, the molar ratio {[(B) + (C)] / (A)} of the total amount [(B) + (C))] of the components (B) and (C) to the component (A) is medium. [(B) + (C)] / (A) = 10 from the viewpoint of forming two types of lamellar structures, that is, bulk lamellar and concentric lamellar, and forming a film having excellent water-blocking properties. It is -80 mol%, preferably 20-70 mol%, more preferably 25-65 mol%, still more preferably 30-60 mol%.
From the same viewpoint, the combination of the component (B) and the component (C) preferably contains the component (B) as aminomethylpropanol or arginine and the component (C) as sodium hydroxide or potassium hydroxide. It is more preferable that B) is arginine and component (C) is sodium hydroxide.

(D) Linear saturated alcohol having 12 to 22 carbon atoms:
The component (D) used in the present invention is a linear saturated alcohol having 12 to 22 carbon atoms, and examples thereof include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol. Of these, a linear saturated alcohol having 14 to 22 carbon atoms is preferable, a linear saturated alcohol having 16 to 22 carbon atoms is more preferable, and the lamellar structure in the cosmetic formed from the component (A) is stable. From the viewpoint of forming bulk lamella and concentric lamella as the lamella, cetyl alcohol or stearyl alcohol is more preferable, and it is even more preferable to contain cetyl alcohol and stearyl alcohol. When the cetyl alcohol and the stearyl alcohol are contained, they may be blended independently or in combination, or further, a mixture thereof, cetostearyl alcohol, may be blended.

As the component (D), at least one or two selected from the linear saturated alcohols having 12 to 22 carbon atoms can be used, from the viewpoint of stabilizing the lamellar structure in the cosmetic, and the said. As the lamella, from the viewpoint of forming bulk lamella and concentric lamella, 0.5% by mass or more is preferable, 1% by mass or more is more preferable, 1.5% by mass or more is further preferable, and 6% by mass or less is preferable. 5.5% by mass or less is more preferable, and 5.2% by mass or less is further preferable. The content of the component (D) is preferably 0.5 to 6% by mass, more preferably 1 to 5.5% by mass, and even more preferably 1.5 to 5.0% by mass in the total composition.

In the present invention, the total amount (A) + (D) of the components (A) and (D) is 1% by mass or more, preferably 2.5% by mass or more, from the viewpoint of enhancing the storage stability of the cosmetic. 3, 3% by mass or more is more preferable, 4.5% by mass or more is further preferable, 12% by mass or less, 9.5% by mass or less is preferable, and 8% by mass or less is more preferable. The total amount of the components (A) and (D) is (A) + (D) = 1 to 12% by mass, preferably 2.5 to 12% by mass, and more preferably 3 to 9.5% by mass. It is preferable, and 4.5 to 8% by mass is more preferable.

Further, the mass ratio of the component (A) to the total amount of the components (A) and (D) [(A) + (D)] {(A) / [(A) + (D)]} is the cosmetic composition. From the viewpoint of forming a lamella on the object and enhancing the moisturizing property, it is 0.2 or more, preferably 0.25 or more, more preferably 0.3 or more, 0.7 or less, and preferably 0.6 or less. , 0.5 or less is more preferable. The mass ratio of the component (A) to the total amount of the components (A) and (D) [(A) + (D)] is (A) / [(A) + (D)] = 0.2 to It is 0.7, preferably 0.25 to 0.6, more preferably 0.3 to 0.5.

(E) Highly Polymerized Silicone (E) Highly Polymerized Silicone enhances the moisturizing property, imparts a smooth feeling, and contributes to the improvement of the friction resistance and the water resistance of the moisturizing property and the smooth feeling.
The highly polymerized silicone of the component (E) is preferably a silicone polymer represented by the following general formula (1).

(In the formula, R ₁ may represent a methyl group or a part thereof may represent a phenyl group, R ₂ represents a methyl group or a hydroxyl group, and n represents a number of 100 to 20,000).
The above silicone polymer can also be used as an emulsion, and from the viewpoint of maintaining the fluidity and viscosity of the emulsion appropriately, low-viscosity liquid dimethylpolysiloxane (for example, dimethylpolysiloxane having a viscosity of 200 mPa · s or less), octamethyl It is preferably provided in an emulsion as a mixture with cyclotetrasiloxane, decamethylcyclopentasiloxane, light isoparaffin, light liquid isoparaffin and the like.
Further, from the viewpoint of improving the stability of the emulsion and improving the moisturizing property, improving the smooth feeling, and improving the friction resistance and water resistance of the smooth feeling, the n of the silicone polymer is 500 to 2,500. preferable.

Further, as highly polymerized silicone, commercially available products such as MK-15H, KF-9028, silicone KF-96H-100,000 CS, KM-910 (highly polymerized polymethylsiloxane component: 36%) (all manufactured by Shin-Etsu Chemical Co., Ltd.) are commercially available. Goods can be used.

The component (E) can be used alone or in combination of two or more, and the content thereof is from the viewpoint of improving the smooth feeling of use and from the viewpoint of improving the abrasion resistance and water resistance of the smooth feeling of use. , 0.001 to 2% by mass is preferable, 0.005 to 1.5% by mass is more preferable, and 0.01 to 1.5% by mass is further preferable in the total composition.

Further, the mass ratio [(E) / (A) + (D)] of the component (E) to the total amount [(A) + (D)] of the components (A) and (D) is moisturizing and smooth. From the viewpoint of durability (friction resistance, water resistance), 0.01 or more is preferable, 0.014 or more is more preferable, 0.02 or more is further preferable, 0.5 or less is preferable, and 0.4 or less is preferable. Is more preferable, and 0.3 or less is further preferable. Specifically, the range of the invention [(E) / (A) + (D)] is preferably 0.01 to 0.5, more preferably 0.014 to 0.4, and 0.02 to 0.3. More preferred.

(F) Water:
The component (F) used in the present invention is water, which is a solvent for the cosmetic of the present invention. The component (F) is the remaining amount of each component, and a stable lamellar structure can be formed in the cosmetic by combining the components (A) to (F).
The content of the component (F) is 50% by mass or more in the total composition from the viewpoint of forming a stable lamellar structure in the cosmetic and from the viewpoint of forming bulk lamella and concentric lamella as the lamella. Is preferable, 60% by mass or more is more preferable, 95% by mass or less is preferable, and 90% by mass or less is more preferable. The content of the component (F) is preferably 50 to 95% by mass, more preferably 60 to 90% by mass in the total composition.

In the present invention, a nonionic surfactant (component (G)) can be contained from the viewpoint of easily forming the lamellar structure as described above and improving the stability of the lamellar structure.
In addition, the nonionic surfactant suppresses the whitening of the skin due to the fine bubbles generated by the friction generated between the skin and the finger when the skin cosmetic of the present invention is applied to the skin with the finger. Can be done. As a result, when applied, the cosmetic can be well applied to the skin.

Examples of the nonionic surfactant include ethylene glycol fatty acid ester such as ethylene glycol monostearic acid ester; polyethylene glycol fatty acid ester such as polyethylene glycol (2) monostearic acid ester; polyethylene glycol (5) decylpentadecyl ether and the like. Polyalkylene glycol alkyl ether; polyethylene glycol (5) cured castor oil Polyethylene glycol-cured castor oil such as monoisolaurate; propylene glycol fatty acid ester; monoglycerin monofatty acid ester such as glycerin monoisostearic acid ester and glycerin monostearic acid ester. Monoglycerindi fatty acid esters such as glycerin distearate, glycerin dilauric acid ester; glycerin alkyl ethers such as glycerin monoisostearyl ether and glycerin monostearyl ether; sorbitan fatty acid esters such as sorbitan monostearic ester; fatty acid alkanolamides Examples thereof include fatty acid dialkanolamides such as laurate diethanolamide.

Among these non-on surfactants, a polyalkylene glycol alkyl ether having an alkyl group having 12 to 22 carbon atoms is preferable, and an alkyl group having 12 to 18 carbon atoms is used, from the viewpoint of suppressing the generation of fine bubbles during coating. Polyalkylene glycol ethers are more preferred.
Further, from the viewpoint of improving the denseness of the lamellar structure and improving the occlusive property, that is, the moisturizing property, the HLB of the non-on surfactant is preferably 1 to 4, and specifically, the glycerin monostearic acid ester (HLB3). .4) and the like monoglycerin monofatty acid ester; glycerin alkyl ether such as glycerin monostearyl ether (HLB 4.0) is preferable.

In the present invention, the HLB value is an index showing the hydrophilic-lipophilic balance (Hydrofil Lipophilic Balance), and in the present invention, the value calculated by the following formula by Oda, Teramura et al. Is used.

The nonionic surfactant of the component (G) can be used alone or in combination of two or more. In addition to the above viewpoints, a viewpoint of enhancing moisturizing property, a viewpoint of suppressing sliminess, and a viewpoint of enhancing the durability of glossiness. Therefore, it is preferable to contain at least two types of polyalkylene glycol ethers having two or more different alkyl groups from each other, such as polyethylene glycol ether (laureth-3) for lauryl alcohol, polyethylene glycol ether for cetyl alcohol, and polyethylene glycol for stearyl alcohol. It is more preferable to contain at least two kinds selected from ethers, and it is further preferable to contain the above three kinds of polyethylene glycol ethers. When two or more types of polyalkylene glycol ethers having an alkyl group having 12 to 18 carbon atoms are used, they may be blended independently or mixed, and the polyethylene glycol ether of cetyl alcohol and stearyl alcohol may be blended. Ceteares-20, which is a mixture of polyethylene glycol ethers, may be blended, preferably containing Laures-3 and Ceteares-20.

The content of the nonionic surfactant of the component (G) is from the viewpoint of improving the moisturizing property, suppressing the sliminess, improving the stability, and suppressing the foaming of the cosmetic composition at the time of application. From the viewpoint, 0.1% by mass or more is preferable, 0.3% by mass or more is more preferable, 0.5% by mass or more is further preferable, 2% by mass or less is preferable, and 1.5% by mass or less is preferable in the total composition. Is more preferable, and 1.3% by mass or less is further preferable. The content of the component (G) is preferably 0.1 to 2% by mass, more preferably 0.3 to 1.5% by mass, and even more preferably 0.5 to 1.3% by mass in the total composition. ..

Further, the mass ratio of the total amount [(A) + (D)] of the components (A) and (D) to the component (G) {[(A) + (D)] / G} improves the moisturizing property. From the viewpoint, the viewpoint of suppressing sliminess, the viewpoint of improving stability, and the viewpoint of suppressing foaming of the cosmetic composition, 3 or more is preferable, 4 or more is more preferable, 5 or more is further preferable, and 30 or less is preferable. It is preferably 20 or less, more preferably 10 or less. Further, the mass ratio {[(A) + (D)] / G} of the total amount [(A) + (D)] of the components (A) and (D) to the component (G) is preferably 3 to 30. 4 to 20 is more preferable, and 5 to 10 is even more preferable.

The skin cosmetic of the present invention contains an oil agent (component (H)) other than the above components (A) and (D) from the viewpoint of improving a smooth feeling of use and forming a good lamellar structure. be able to.

Examples of the component (H) used in the present invention include hydrocarbon oils such as liquid paraffin, squalane, and vaseline; ether oils such as cetyldimethylbutyl ether, ethylene glycol dioctyl ether, and glycerol monooleyl ether; octyldodecyl myristate and palmitin. Ester oils such as isopropyl acid, butyl stearate, di-2-ethylhexyl adipate, neopentyl glycol dicaprate, trioctanoin, alkyl benzoate; dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylphenylpolysiloxane, amino-modified Silicone oils such as silicone, carboxy-modified silicone, alcohol-modified silicone, alkyl-modified silicone, polyether-modified silicone, fluorine-modified silicone; perfluoroalkylethyl phosphate, perfluoroalkylpolyoxyethylene phosphate, perfluoropolyether, polytetra Examples include fluorine-based oils such as fluoroethylene. Moreover, these oil agents may be derived from a plant.

Of these, hydrocarbon oils, ester oils and silicone oils are preferable from the viewpoint of improving a smooth feeling of use, and at least one selected from liquid paraffin, squalane and vaseline is preferable as the hydrocarbon oil, and as the ester oil. Is preferably at least one selected from octyldodecyl myristate, isopropyl palmitate, butyl stearate, di-2-ethylhexyl adipate, neopentyl glycol dicaprate, trioctanoin, and alkyl benzoate, as the silicone oil. , Dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylphenylpolysiloxane, amino-modified silicone, carboxy-modified silicone, alcohol-modified silicone, alkyl-modified silicone, polyether-modified silicone, and fluorine-modified silicone, at least one selected from them is preferable.

As the component (H), at least one or two or more selected from the above oils can be used.
The content of the component (H) is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and 0.5% by mass in the total composition from the viewpoint of improving the smoothness of the skin after application. The above is more preferable, 20% by mass or less is preferable, 18% by mass or less is more preferable, and 16% by mass or less is further preferable. The content of the component (H) is preferably 0.1 to 20% by mass, more preferably 0.3 to 18% by mass, and even more preferably 0.5 to 16% by mass in the total composition.

In the present invention, the mass ratio of the component (H) to the total amount [(A) + (D)] of the components (A) and (D) {(H) / [(A) + (D)]} is moisturizing. From the viewpoint of enhancing the property and maintaining the smooth feeling, 0.1 or more is preferable, 0.15 or more is more preferable, 0.2 or more is further preferable, 3 or less is preferable, and 2 or less is more preferable. 5 or less is more preferable. The mass ratio of the component (H) to the total amount of the components (A) and (D) [(A) + (D)] {(H) / [(A) + (D)]} is 0.1. ~ 3 is preferable, 0.15-2 is more preferable, and 0.2 to 1.5 is further preferable.

The skin cosmetics of the present invention further include components other than the components (A) to (H) as components used in ordinary cosmetics, such as thickeners, bactericides, moisturizers, wetting agents, and coloring agents. , Preservatives, feel improvers, powders, fragrances, anti-inflammatory agents, whitening agents, antiperspirants, ultraviolet absorbers, antioxidants and the like can be appropriately contained.

Further, in the present invention, from the viewpoint of forming a concentric lamella having a highly dense film, improving the stability of the lamellar structure, improving the moisturizing property, and reducing the oily feeling, anionic surfactant activity. The agent can be contained.
The anionic surfactant is selected from those excluding the component (A), and is, for example, an alkyl sulfate ester having 12 to 22 carbon atoms such as sodium lauryl sulfate and potassium lauryl sulfate or a salt thereof; triethanol polyoxyethylene lauryl sulfate. Alkyl ether sulfate ester having 12 to 22 carbon atoms such as amine or a salt thereof; N-acylsarcosine having 12 to 22 carbon atoms such as sodium lauroyl sarcosin or a salt thereof; Alkyl having 12 to 22 carbon atoms such as sodium monostearyl phosphate Phosphoric acid or a salt thereof; Alkyl ether phosphate having 12 to 22 carbon atoms such as polyoxyethylene oleyl ether phosphate or sodium polyoxyethylene stearyl ether phosphate or a salt thereof; Sodium di-2-ethylhexyl sulfosuccinate Dialkyl sulfosuccinic acid having 12 to 24 carbon atoms or a salt thereof; N-alkylmethyl taurine having 12 to 22 carbon atoms such as sodium N-stearoyl-N-methyl taurine or a salt thereof; sodium dilauroyl glutamate, N-lauroyl Acylglutamic acid having 12 to 22 N-carbon atoms such as monosodium glutamate, sodium N-stearoyl-L-glutamate, arginine N-stearoyl-L-glutamate, sodium N-stearoyl glutamate, sodium N-myristoyl-L-glutamate, or the like Examples include salt.

As the anionic surfactant, at least one or more selected from the above-mentioned anionic surfactants can be used, and one of them can be used alone or in combination of two or more.
The content of the anionic surfactant is 0.01 in the total composition from the viewpoint of forming a concentric lamella having a highly dense film, improving the stability of the lamellar structure, and improving the moisturizing property. Mass% or more is preferable, 0.1% by mass or more is more preferable, 0.3% by mass or more is further preferable, 2% by mass or less is preferable, 1.8% by mass or less is more preferable, and 1.5% by mass or less is preferable. More preferred.

Furthermore, the skin cosmetics of the present invention can contain solid fats other than the components (A) and (D). The content thereof is preferably 10% by mass or less, more preferably 8% by mass or less, further preferably 5% by mass or less, still more preferably 3% by mass or less, from the viewpoint of stabilizing the lamellar structure.

In the skin cosmetic of the present invention, for example, the components (B), (C) and (F) are mixed and dissolved at 60 to 100 ° C. to make them uniform to form an aqueous phase portion. The components (A), (D) and (E) are mixed and dissolved at 60 to 100 ° C. to make them uniform and form an oil phase portion. The aqueous phase portion and the oil phase portion can be mixed and made uniform, and can be produced by cooling to preferably 5 to 30 ° C., more preferably 10 to 28 ° C., and further preferably 15 to 26 ° C. it can.

The skin cosmetic of the present invention preferably has a pH of 5.5 to 8 and more preferably pH of 6.0 to 7.8 at 25 ° C. from the viewpoint of forming a stable lamellar structure in the cosmetic. , PH 6.5-7.8 is more preferable. In the present invention, the pH is a pH meter (F-52).
, HORIBA), the sample is measured directly at 25 ° C.

The skin cosmetic of the present invention can be, for example, a lotion, a milky lotion, a cream, a gel, a beauty essence, etc., and is particularly preferable to be used as a cream or gel. Further, the sheet-like cosmetics may be impregnated or applied to a sheet-like base material such as a woven fabric or a non-woven fabric.
The skin cosmetic of the present invention can be used by applying it to any of the skin, preferably the scalp, more preferably the face, body, limbs and the like.
In addition, the skin cosmetic of the present invention can be moisturized by being applied to the skin, and can give a smooth feeling of use.

Next, the present invention will be described in more detail with reference to examples.

Examples 1-12, Comparative Examples 1-6
Skin cosmetics having the compositions shown in Tables 1 and 2 were produced, and the presence or absence of lamellar structure formation in the cosmetics and the dry film was observed. In addition, the moisturizing property (moisture obstruction), the friction resistance of the smooth feeling, and the water resistance of the smooth feeling were evaluated. The results are also shown in Tables 1 and 2.

(Production method)
The aqueous phase component containing the components (B), (C) and (F) is stirred and dissolved at 70 to 80 ° C. to form an aqueous phase portion. Next, the oil phase component containing the components (A), (D) and (E) is stirred and dissolved at 70 to 80 ° C. to form an oil phase portion. The oil phase portion was added to the aqueous phase portion with stirring at 70 to 80 ° C., and further cooled to room temperature (25 ° C.) with stirring to produce a skin cosmetic (oil-in-water emulsified cosmetic).

(Evaluation method)
(1) Confirmation of lamellar structure:
(1-1) Structural analysis of cosmetics by small-angle X-ray diffraction method:
The phase state of the cosmetic and the dry film was analyzed by small-angle X-ray diffraction measurement. The dry film was prepared by stretching 1 g of each cosmetic with an applicator to a thickness of 0.1 mm and drying it in a 20 ° C. and 20% RH environment for 24 hours. In the obtained X-ray diffraction profile, the one in which the repeated diffraction peak characteristic of the lamellar structure was observed was shown as "Y", and the one in which the repeated diffraction peak was not observed was shown as "N".

(1-2) Confirmation of the presence of bulk lamella and concetrical lamella by polarizing microscope:
A sample (thickness 25 mm) was observed with a polarizing microscope (200 times), and those in which maltese cloth was confirmed around the oil droplets were "Y" (concetrical lamella was present), and those that were not were "N". It was shown as. Next, the same sample is observed through a polarizing plate, and the one that looks shining as a whole and the crystal is not visible is "Y" (there is bulk lamella), and the one that looks shining as a whole but the crystal is visible is "N". ", The one that did not appear to shine as a whole was shown as" N ".

(2) Moisturizing persistence (obstructive):
0.5 mL of each skin cosmetic was used on the entire face by 10 specialized panelists. The moisturizing feeling after 5 hours was evaluated according to the following criteria, and the average value was calculated.
5; Very moisturizing feeling.
4; Feel a moisturizing feeling.
3; Feel a little moisturizing.
2; Almost no moisturizing feeling.
1; I do not feel a moisturizing feeling.

(3) Smooth friction resistance:
0.2 mL of each skin cosmetic is applied to the entire medial part of the forearm by 10 specialized panelists. After 5 minutes, a cotton cloth (cotton broad) was pressed against the cloth (30 seconds, load 200 g, 2.5 cmφ), and the cotton cloth was further moved 5 cm with respect to the application site. It was repeated 5 times. Then, the friction resistance of the smooth feeling was evaluated for the coated portion according to the following criteria, and the average value was calculated.
5; I don't feel any stickiness, and my rubbed fingers move very smoothly.
4; The worn fingers move smoothly with almost no stickiness.
3; I feel a little sticky, but my worn fingers move smoothly.
2; I feel a little sticky, and my rubbed fingers get caught a little.
1; Feeling sticky, feeling that a worn finger gets caught.

(4) Smooth water resistance:
0.2 mL of each skin cosmetic is applied to the entire medial part of the forearm by 10 specialized panelists. After 5 minutes, purified water at room temperature was poured over the application site under the condition of 3 L / min for 30 seconds, and then lightly pressed from above with a Kim towel to wipe off the water droplets. Towel drying was repeated 3 times, and after 5 minutes, the water resistance of the smooth feeling was evaluated according to the following criteria, and the average value was calculated.
5: I don't feel any stickiness, and my rubbed fingers move very smoothly.
4: I hardly feel stickiness, and my rubbed fingers move smoothly.
3: I feel a little sticky, but my worn fingers move smoothly.
2: It feels a little sticky, and the worn fingers get caught a little.
1: Feeling sticky, feeling that a worn finger gets caught.

Claims (3)

The following components (A) to (F):
(A) Linear saturated fatty acid having 12 to 22 carbon atoms 0.5 to 6% by mass ,
(B) Basic amino acid 0.01 to 1% by mass ,
(C) Alkali metal hydroxide 0.01 to 1% by mass ,
(D) Linear saturated alcohol having 12 to 22 carbon atoms 0.5 to 6% by mass ,
(E) General formula (1)
(In the formula, R ₁ may represent a methyl group or a part thereof may represent a phenyl group, R ₂ represents a methyl group or a hydroxyl group, and n represents a number of 100 to 20,000).
Contains 0.001 to 2% by mass of the silicone polymer represented by, and (F) water.
The total amount of the components (A) and (D) is (A) + (D) = 1 to 12% by mass.
The mass ratio of the component (A) to the total amount [(A) + (D)] of the components (A) and (D) is (A) / [(A) + (D)] = 0.2 to 0. 7 and
The molar ratio of the component (B) to the total amount of the components (B) and (C) [(B) + (C)] is (B) / [(B) + (C)] = 5 to 60 mol%. Yes,
The molar ratio of the total amount [(B) + (C)) of the components (B) and (C) to the component (A) is [(B) + (C)] / (A) = 10 to 80 mol%. Is a skin cosmetic. The mass ratio of the component (E) to the total amount of the components (A) and (D) {(A) + (D)} is (E) / {(A) + (D)} = 0.01 to 0.5. The skin cosmetic according to claim 1. The skin cosmetic according to claim 1 or 2, further comprising (G) a nonionic surfactant in an amount of 0.1 to 2% by mass.