JP2018070447A - Skin cosmetics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide skin cosmetics that form a coating having a lamellar structure, the skin cosmetics having a high moisture retention effect and a good use feeling, where the moisture retention effect and use feeling last for a long time.SOLUTION: Skin cosmetics contain following components (A)-(F): (A) a C12-22 linear saturated fatty acid, (B) an organic base, (C) an inorganic base, (D) a C12-22 linear saturated alcohol, (E) a highly polymerized silicone and (F) water. The total content of components (A) and (D) is: (A)+(D)=1-12 mass%. A mass ratio of the component (A) to the total content of components (A) and (D) [(A)+(D)] is: (A)/[(A)+(D)]=0.2-0.7; a molar ratio of the component (B) to the total content of components (B) and (C) [(B)+(C)] is: (B)/[(B)+(C)]=5-60 mol%; a molar ratio of the total content of components (B) and (C) [(B)+(C)] to the component (A) is: [(B)+(C)]/(A)=10-80 mol%.SELECTED DRAWING: None

Description

  The present invention relates to a skin cosmetic.

  In order to protect the skin from the external environment such as dryness and physical irritation, and to keep the skin soft and moisturized, polyols such as glycerin, various oils, moisturizers such as amino acids and hyaluronic acid are used. Formulated cosmetics have been developed. These cosmetics are coated with an emulsified layer containing oil and water on the skin to protect the skin from external irritation, prevent transpiration of moisture from the inside of the skin, and provide a certain amount of moisture to the skin. By giving, it contributes to the improvement of rough skin and dry skin.

On the other hand, cosmetics containing a keratin intercellular lipid component such as ceramide and having a lamellar structure similar to intercellular lipid have been proposed (Non-patent Document 1, Patent Document 1).
However, when an amphiphilic solid fat having a high melting point, such as ceramides, is blended in an oil-in-water emulsion, the emulsion is likely to be separated or gelated over time, and it is difficult to blend stably. Therefore, the manufacturing method and prescription are highly restricted.

In addition, since ceramide is easily crystallized, a method of using a large amount of emulsifier with respect to ceramide has been proposed (Patent Document 2 and Patent Document 3), but there is also a problem that the skin does not fit well.
Moreover, since ceramide itself is expensive, there was 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 been studied (for example, Patent Document 4). In addition, by blending higher fatty acids, higher alcohols, organic bases, inorganic bases, oils and water at a certain ratio, a cosmetic coating film having a lamellar structure is formed on the skin surface, and has high moisture retention and gloss. Also, skin cosmetics excellent in storage stability have been reported (Patent Document 5).

JP-A-6-345633 JP 2003-12486 A Japanese Patent Laid-Open No. 7-223934 JP 2007-9199 A JP, 2006-500051, A

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

However, in the skin cosmetics that form the lamellar structure, it cannot be said that the moisture retention is sufficiently satisfactory, and there is room for improvement in terms of use feeling such as stickiness of the coating film, and the good use feeling is maintained. It was not satisfactory in terms of sex.
Accordingly, an object of the present invention is a skin cosmetic that forms a coating film having a lamellar structure, has high moisture retention, has a good feeling of use, and maintains the moisture retention and 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 quantitative ratio in addition to higher fatty acid, higher alcohol, organic base, inorganic base and water. In addition to having a high moisturizing property, it is possible to obtain an unexpected feeling of use such as an excellent smoothness, and to obtain a skin cosmetic having characteristics that the moisturizing property and smoothness are not easily lowered by friction or water. The headline and the present invention were completed.

That is, the present invention includes the following components (A) to (F):
(A) a linear saturated fatty acid having 12 to 22 carbon atoms,
(B) an organic base,
(C) an inorganic base,
(D) a linear saturated alcohol having 12 to 22 carbon atoms,
(E) containing highly polymerized silicone and (F) water,
The total amount of components (A) and (D) is (A) + (D) = 1-12% 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)] = 0.2-0. 7,
The molar ratio of the component (B) to the total amount [(B) + (C)] of the components (B) and (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%. A skin cosmetic is provided.

  By using the skin cosmetic of the present invention, a cosmetic coating film having a lamellar structure is formed on the skin surface, and not only has a high moisturizing property, but also an unexpected smooth feeling of use is obtained. The smooth feeling is hard to be lowered by friction and water and lasts.

  The skin cosmetic of the present invention has a lamellar structure, but has one feature in 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 cosmetics (hereinafter referred to as a bulk lamella). In addition, the concentric lamella has a great feature that it coexists in the shape of a sea island. The coexistence state of the bulk lamella and the concentric lamella also exists for a long time in the skin film formed after application to the skin. On the other hand, many conventional cosmetics have only one lamella structure or the lamella disappears in the coated film. Therefore, it seems that the structure and characteristics of such a lamella contribute to the excellent effect of the present invention that it can be applied to the skin evenly, and it can be applied to the skin without the moisture occlusion of the present invention. . High moisture occlusiveness means excellent moisture retention. Bulk lamellae and concentric lamellae can be confirmed with a polarizing microscope (sample thickness: 25 mm). That is, the presence of the bulk lamella indicates that the whole is shining, and the presence of the concentric lamella indicates that the Maltese cloth is visible.

(A) 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 behenic 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 makeup. From the viewpoint of forming a stable lamellar structure in a material, and as a lamella, a bulk lamella and a concentric lamella are more preferable. Furthermore, stearic acid is more preferable from the viewpoint of the stability of the lamellar structure and from the viewpoint of forming a bulk lamella and a concentric lamella as the lamella.

  The component (A) can be used alone or in combination of two or more thereof, and a lamellar structure can be formed in the cosmetic by neutralization with the components (B) and (C) described later. Therefore, the component (A) exists as a fatty acid or a salt thereof in the cosmetic, but in the present invention, the content of the component (A) is an amount converted to a fatty acid.

In the skin cosmetic of the present invention, from the viewpoint of improving moisture retention, the component (A) preferably contains two or more types of linear saturated fatty acids having 12 to 22 carbon atoms, which are different from each other by 2 or more. .
The skin cosmetic contains 2 or more types of linear saturated fatty acids having 2 or more carbon atoms different from each other, thereby improving the density of the lamellar structure and increasing the occlusion, that is, improving the moisture retention. It is thought that.
Among the two or more types of linear saturated fatty acids having two or more different carbon numbers, the carbon having 12 to 22 linear saturated fatty acids having a larger carbon number (also referred to as a high carbon number saturated fatty acid in the present invention). The number is preferably 14 to 22, more preferably 16 to 20, and still more preferably 18 from the viewpoint of improving the moisture retention. Further, from the same viewpoint, the carbon number of the linear saturated fatty acid having 12 to 22 carbon atoms having the smaller carbon number (also referred to as the low carbon saturated fatty acid in the present invention) is preferably 12 to 20, and more. Preferably it is 12-18, More preferably, it is 14-16.
Furthermore, from the same viewpoint, when the component (A) contains two or more kinds of linear saturated fatty acids having two or more carbon atoms different from each other, at least a linear saturated fatty acid having 16 or 18 carbon atoms, ie, palmitic acid. It preferably contains an acid or stearic acid, and more preferably contains at least 18 linear saturated fatty acids, ie 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 moisture retention.

  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 a bulk lamella and a concentric lamella as the lamella. Is more preferable, 1.5 mass% or more is more preferable, 2.0 mass% or more is further preferable, 6 mass% or less is preferable, 4 mass% or less is more preferable, and 3.5 mass% or less is further more preferable. Moreover, 0.5-6 mass% is preferable in the whole composition, content of a component (A) has more preferable 1.5-4 mass%, and 2.0-3.5 mass% is further more preferable.

(B) Organic base:
Component (B) used in the present invention is an organic base, and examples thereof include alkylamines, alkanolamines, and basic amino acids. Preferably, the alkylamine which has a C1-C6 alkyl group, the alkanolamine which has a C1-C6 alkyl group, and a basic amino acid are mentioned. Component (B) functions as a neutralizing agent for component (A).
Specifically, examples of the alkylamine include methylamine, ethylamine, propylamine, butylamine, hexylamine, dimethylamine, and diethylamine. Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, N-methyl-diethanolamine, N, N-dimethylmonoethanolamine, aminomethylpropanol and the like, and aminomethylpropanol is preferable. Examples of basic amino acids include lysine, histidine, arginine and the like, and arginine is preferred. Among arginines, L-arginine is preferable.
Among these, the viewpoint which neutralizes a component (A) and forms a stable lamellar structure in cosmetics, and a viewpoint which forms a bulk lamella and a concentric lamella as this lamella, and improves moisture retention 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 Are more preferred, basic amino acids are more preferred, aminomethylpropanol or arginine is even more preferred, and arginine is still more preferred. Among arginines, L-arginine is preferable.

Component (B) can be used at least one or two or more selected from the above organic bases, and from the viewpoint of increasing the stability of the lamellar structure of the skin cosmetic and from the viewpoint of increasing the moisture retention, component (A) The molar ratio of component (B) 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 The mol% or less is preferable, the less than 80 mol% is more preferable, and the 60 mol% or less is more preferable.
The content of the component (B) is preferably 0.01% by mass or more and more preferably 0.02% 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 moisture retention. 0.1 mass% or more is more preferable, 1 mass% or less is preferable, 0.8 mass% or less is more preferable, and 0.4 mass% or less is further more preferable. Further, the content of the component (B) is preferably 0.01 to 1% by mass, more preferably 0.02 to 0.8% by mass, and further preferably 0.1 to 0.4% by mass in the entire composition. .
In addition, although a component (B) can form a salt with a component (A) and another acid in cosmetics, in this invention, content of a component (B) is the quantity converted into the organic base. is there.

(C) Inorganic base:
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. Component (C) functions as a neutralizing agent for component (A).
Among these, from the viewpoint of neutralizing the component (A) and forming a stable lamellar structure in the cosmetic, and from the viewpoint of forming a bulk lamella and a concentric lamella as the lamella, alkali metal hydroxide Products are preferred, sodium hydroxide and potassium hydroxide are more preferred, and sodium hydroxide is still more preferred.

Component (C) can be used singly or in combination of at least two selected from the above-mentioned inorganic groups. From the viewpoint of enhancing the stability of the lamellar structure of skin cosmetics and improving moisture retention, component (C) The molar ratio of 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%. Or less, more preferably less than 80 mol%, and even more preferably 60 mol% or less.
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 moisture retention. 0.1 mass% or more is more preferable, 1 mass% or less is preferable, 0.3 mass% or less is more preferable, and 0.2 mass% or less is further more preferable. Further, the content of the component (C) is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.3% by mass, and further preferably 0.1 to 0.2% by mass in the entire composition. .
In addition, although a component (C) can form a salt with a component (A) and another acid in cosmetics, in this invention, content of a component (C) is the quantity converted into the inorganic base. is there.

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

The molar ratio {[(B) + (C)] / (A)} of the total amount [(B) + (C))] of the components (B) and (C) to the component (A) is [(B) + (C)] / (A) = 10 from the viewpoint of forming a film excellent in moisture occlusiveness from the viewpoint of forming a film having excellent moisture occlusiveness. It is -80 mol%, 20-70 mol% is preferable, 25-65 mol% is more preferable, 30-60 mol% is still more preferable.
From the same viewpoint, the combination of component (B) and component (C) is preferably such that component (B) is aminomethylpropanol or arginine and component (C) is sodium hydroxide or potassium hydroxide. More preferably, B) is arginine and component (C) is sodium hydroxide.

(D) Linear saturated alcohol having 12 to 22 carbon atoms:
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. Among 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 a lamellar structure in the cosmetic formed from the component (A) is stabilized. From the viewpoints of forming a lamella and from the viewpoint of forming a bulk lamella and a concentric lamella, cetyl alcohol or stearyl alcohol is more preferred, and cetyl alcohol and stearyl alcohol are even more preferred. When cetyl alcohol and stearyl alcohol are contained, they may be blended independently or as a mixture, or cetostearyl alcohol which is a mixture thereof may be blended.

  Component (D) can be used at least one or more selected from the above-mentioned linear saturated alcohols having 12 to 22 carbon atoms, and can stabilize the lamellar structure in cosmetics, As a lamella, from the viewpoint of forming a bulk lamella and a concentric lamella, the total composition is preferably 0.5% by mass or more, more preferably 1% by mass or more, further preferably 1.5% by mass or more, and preferably 6% by mass or less. 5.5 mass% or less is more preferable, and 5.2 mass% or less is further more preferable. Moreover, 0.5-6 mass% is preferable in the whole composition, as for content of a component (D), 1-5.5 mass% is more preferable, and 1.5-5.0 mass% is further more preferable.

  In the present invention, the total amount (A) + (D) of the components (A) and (D) is 1% by mass or more, and preferably 2.5% by mass or more from the viewpoint of enhancing the storage stability of the cosmetic. 3 mass% or more is more preferable, 4.5 mass% or more is still more preferable, it is 12 mass% or less, 9.5 mass% or less is preferable, and 8 mass% or less is more preferable. Moreover, the total amount of component (A) and (D) is (A) + (D) = 1-12 mass%, 2.5-12 mass% is preferable, and 3-9.5 mass% is more. Preferably, 4.5-8 mass% is still more preferable.

  The mass ratio {(A) / [(A) + (D)]} of the component (A) to the total amount [(A) + (D)] of the components (A) and (D) is a cosmetic composition. From the viewpoint of forming lamellae on the object and improving moisture retention, 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 [(A) + (D)] of the components (A) and (D) is (A) / [(A) + (D)] = 0.2 to 0.7, preferably 0.25 to 0.6, and more preferably 0.3 to 0.5.

(E) Highly Polymerized Silicone (E) Highly polymerized silicone contributes to improving moisture retention, imparting a smooth feeling, and improving moisture resistance and smooth friction resistance and water resistance.
The highly polymerized silicone of component (E) is preferably a silicone polymer represented by the following general formula (1).

(In the formula, R ₁ represents 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 silicone polymer can also be used as an emulsion. 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 The emulsion is preferably used 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 moisture retention, improving the smooth feeling, improving the smooth frictional resistance, and improving the water resistance, n of the silicone polymer is 500 to 2,500. preferable.

  Moreover, as high-polymerization silicone, MK-15H, KF-9028, silicone KF-96H-100,000 CS, KM-910 (high-polymerization polymethylsiloxane component: 36%) (above, manufactured by Shin-Etsu Chemical Co., Ltd.), etc. Product can be used.

  Component (E) can be used alone or in combination of two or more thereof, and its content is from the viewpoint of improving the smooth use feeling and from the viewpoint of improving the smooth use feeling of friction resistance and water resistance. The total composition is preferably 0.001 to 2 mass%, more preferably 0.005 to 1.5 mass%, and still more preferably 0.01 to 1.5 mass%.

  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 property and smooth feeling. 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 more preferable, 0.5 or less is preferable, and 0.4 or less Is more preferable, and 0.3 or less is more 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. Further preferred.

(F) Water:
The component (F) used in the present invention is water and serves as a solvent for the cosmetic of the present invention. The component (F) becomes the remaining amount of each component, and a stable lamellar structure can be formed in the cosmetic by the combination of 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 cosmetics and from the viewpoint of forming a bulk lamella and a concentric lamella as the lamella. 60 mass% or more is more preferable, 95 mass% or less is preferable, and 90 mass% or less is more preferable. Moreover, 50-95 mass% is preferable in the whole composition, and, as for content of a component (F), 60-90 mass% is more preferable.

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 whitening of the skin due to fine bubbles generated by 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 do. As a result, when applied, the cosmetic can be well adapted to the skin.

  Examples of the nonionic surfactant include ethylene glycol fatty acid esters such as ethylene glycol monostearate; polyethylene glycol fatty acid esters such as polyethylene glycol (2) monostearate; polyethylene glycol (5) decylpentadecyl ether and the like. Polyalkylene glycol alkyl ethers of polyethylene glycol (5) polyethylene glycol hardened castor oil such as hydrogenated castor oil monoisolaurate; propylene glycol fatty acid ester; monoglycerin monofatty acid ester such as glycerin monoisostearic acid ester and glycerin monostearic acid ester Monoglycerin difatty acid esters such as glyceryl distearate and glycerin dilaurate; Fatty acid alkanolamides; sorbitan monostearate sorbitan fatty acid esters such as phosphate esters; monoisostearyl ether, glycerin alkyl ethers such as glycerin monostearyl ether and fatty acid dialkanolamide such as lauric acid diethanol amide.

Of these non-on surfactants, polyalkylene glycol alkyl ethers having an alkyl group having 12 to 22 carbon atoms are preferable, and having an alkyl group having 12 to 18 carbon atoms, from the viewpoint of suppressing the generation of fine bubbles during coating. Polyalkylene glycol ether is more preferred.
Further, from the viewpoint of improving the denseness of the lamella structure and improving the occlusion property, that is, the moisture retention, the HLB of the non-on surfactant is preferably 1 to 4, and specifically, glycerin monostearate (HLB3 .4) monoglycerin monofatty acid esters; glycerin monostearyl ether (HLB4.0) and other glycerin alkyl ethers are preferred.

  In the present invention, the HLB value is an index indicating a hydrophilic-lipophilic balance. In the present invention, a value calculated by the following equation by Oda and Teramura et al. Is used.

  The nonionic surfactant of component (G) can be used singly or in combination of two or more. In addition to the above viewpoints, the viewpoint of improving moisture retention, the viewpoint of suppressing luster, and the viewpoint of increasing the persistence of gloss. Therefore, it is preferable to contain at least two polyalkylene glycol ethers having two or more alkyl groups different from each other in the alkyl group, polyethylene glycol ether of lauryl alcohol (laureth-3), polyethylene glycol ether of cetyl alcohol, polyethylene glycol of stearyl alcohol It is more preferable to contain at least two selected from ethers, and it is more preferable to contain the above three types 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 may be blended and blended, such as polyethylene glycol ether of cetyl alcohol, stearyl alcohol Cetealess-20, which is a mixture of polyethylene glycol ethers, may be blended, and preferably contains Laureth-3 and Cetealess-20.

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

  Further, the mass ratio {[(A) + (D)] / G} of the total amount [(A) + (D)] of the components (A) and (D) with respect to the component (G) improves the moisture retention. From the viewpoints, from the viewpoints of suppressing sliminess, from the viewpoint of improving stability, and from the viewpoint of suppressing foaming of the cosmetic composition, 3 or more is preferable, 4 or more is more preferable, 5 or more is more preferable, and 30 or less is Preferably, 20 or less is more preferable, and 10 or less is still more preferable. 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. 4-20 are more preferable and 5-10 are still more preferable.

  The skin cosmetic of the present invention contains an oil agent (component (H)) other than the components (A) and (D) from the viewpoint of improving a smooth use feeling 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 petrolatum; ether oils such as cetyldimethylbutyl ether, ethylene glycol dioctyl ether and glycerol monooleyl ether; octyldodecyl myristate, palmitic Ester oil such as isopropyl acid, butyl stearate, di-2-ethylhexyl adipate, neopentyl glycol dicaprate, trioctanoin, alkyl benzoate; dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylphenylpolysiloxane, amino-modified Silicone oil such as silicone, carboxy-modified silicone, alcohol-modified silicone, alkyl-modified silicone, polyether-modified silicone, fluorine-modified silicone; Fluoroalkyl ethyl phosphate, perfluoroalkyl polyoxyethylene phosphoric acid, a perfluoropolyether, such as fluorine-based oils such as polytetrafluoroethylene. These oil agents may be derived from plants.

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

Component (H) can be used alone or in combination of at least two selected from the above oil agents.
The content of component (H) is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and more preferably 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 more preferable. Moreover, 0.1-20 mass% is preferable in the whole composition, as for content of a component (H), 0.3-18 mass% is more preferable, 0.5-16 mass% is further more preferable.

  In the present invention, the mass ratio {(H) / [(A) + (D)]} of the component (H) to the total amount [(A) + (D)] of the components (A) and (D) is the moisture retention. From the viewpoint of enhancing the property and maintaining a 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, 2 or less is more preferable, and 1. 5 or less is more preferable. The mass ratio {(H) / [(A) + (D)]} of the component (H) to the total amount [(A) + (D)] of the components (A) and (D) is 0.1. ~ 3 is preferable, 0.15 to 2 is more preferable, and 0.2 to 1.5 is still more preferable.

  The skin cosmetics of the present invention are components other than the components (A) to (H) as components used in ordinary cosmetics, and include, for example, 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.

In the present invention, from the viewpoint of forming a concentric lamella having a highly dense film, the viewpoint of improving the stability of the lamella structure, the viewpoint of improving the moisture retention, and the viewpoint of reducing the oily feeling, anionic surface activity An agent can be contained.
The anionic surfactant is selected from those excluding the component (A), and examples thereof include alkyl sulfates having 12 to 22 carbon atoms such as sodium lauryl sulfate and potassium lauryl sulfate or salts thereof; polyoxyethylene lauryl sulfate triethanol Alkyl ether sulfates having 12 to 22 carbon atoms such as amines or salts thereof; N-acyl sarcosine having 12 to 22 carbon atoms such as lauroyl sarcosine sodium or salts thereof; alkyls having 12 to 22 carbon atoms such as sodium monostearyl phosphate Phosphoric acid or a salt thereof; Polyoxyethylene C12-C22 alkyl ether phosphoric acid or a salt thereof such as sodium polyoxyethylene oleyl ether phosphate or sodium polyoxyethylene stearyl ether phosphate; sodium di-2-ethylhexyl sulfosuccinate Dialkylsulfosuccinic acid having 12 to 24 carbon atoms or a salt thereof; N-alkyloylmethyl taurine having 12 to 22 carbon atoms such as N-stearoyl-N-methyltaurine or a salt thereof; sodium dilauroylglutamate, N-lauroylglutamic acid Acyl glutamic acid having 12 to 22 carbon atoms, such as monosodium, sodium N-stearoyl-L-glutamate, arginine N-stearoyl-L-glutamate, sodium N-stearoyl glutamate, sodium N-myristoyl-L-glutamate, or a salt thereof Etc.

As the anionic surfactant, at least one selected from the above-mentioned anionic surfactants can be used, and one kind can be used alone, or two or more kinds can be used in combination.
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, from the viewpoint of improving the stability of the lamella structure, and from the viewpoint of improving the moisture retention. % By mass or more is preferred, 0.1% by mass or more is more preferred, 0.3% by mass or more is more preferred, 2% by mass or less is preferred, 1.8% by mass or less is more preferred, and 1.5% by mass or less is preferred. Further preferred.

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

  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 a water phase part. Ingredients (A), (D) and (E) are mixed, dissolved at 60 to 100 ° C., and made uniform to form an oil phase part. The water phase part and the oil phase part are mixed and made uniform, and preferably produced by cooling to 5 to 30 ° C, more preferably to 10 to 28 ° C, and even more preferably to 15 to 26 ° C. it can.

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

The skin cosmetic of the present invention can be, for example, lotion, milky lotion, cream, gel, cosmetic liquid, etc., and is particularly preferably used as a cream or gel. Moreover, it can also be set as the sheet-like cosmetics impregnated or apply | coated to sheet-like base materials, such as a woven fabric and a nonwoven fabric.
The skin cosmetics of the present invention can be used by applying to the skin, preferably the scalp, more preferably any one of the face, body, limbs and the like.
In addition, the skin cosmetic of the present invention can be moisturized by applying it to the skin, and can also give a smooth feeling of use.

  EXAMPLES Next, an Example is given and this invention is demonstrated still in detail.

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 formation of a lamellar structure in the cosmetics and the dried film was observed. In addition, the moisture retention (moisture occlusiveness), the smooth friction resistance, and the smooth water resistance were evaluated. A result is combined with Table 1-2 and shown.

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

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

(1-2) Confirmation of presence of bulk lamellae and concise lamellae with a polarizing microscope:
When a sample (thickness 25 mm) was observed with a polarizing microscope (200 ×) and a Maltese cloth was confirmed around the oil droplet, “Y” (conceltic lamella was present) and “N” was not observed. ". Next, the same sample is observed through a polarizing plate, and “Y” (a bulk lamella is present) is seen as if it is totally shining and crystals are not seen. ”, And“ N ”indicates that the whole was not shining.

(2) Moisture retention (occlusion):
Ten professional panelists used 0.5 mL of each skin cosmetic on the entire face. The moisturizing feeling after 5 hours was evaluated according to the following criteria, and the average value was determined.
5; I feel very moisturizing.
4; I feel a moisturizing feeling.
3; I feel a little moisturizing feeling.
2; almost no moisturizing feeling.
1; Does not feel moisturizing.

(3) Smooth friction resistance:
Ten professional panelists apply 0.2 mL of each skin cosmetic to the entire inner forearm. After 5 minutes, the cotton fabric (cotton broad) was pressed (30 seconds, load 200 g, 2.5 cmφ), and the cotton fabric was further moved 5 cm relative to the application site. This was repeated 5 times. Then, according to the following reference | standard with respect to the application | coating site | part, the frictional resistance of smooth feeling was evaluated and the average value was calculated | required.
5; There is no stickiness at all and the brushed finger moves very smoothly.
4; Little stickiness is felt, and the brushed fingers move smoothly.
3; I feel a little sticky, but my finger is moving smoothly.
2; Feels sticky a little and feels like a finger is slightly caught.
1; Feeling sticky and catching fingers.

(4) Smooth water resistance:
Ten professional panelists apply 0.2 mL of each skin cosmetic to the entire inner forearm. After 5 minutes, purified water at room temperature was allowed to flow through the application site for 30 seconds under the condition of 3 L / min, and then the water droplets were wiped by gently pressing from above using a Kim towel. Towel drying was repeated 3 times, and after 5 minutes, the smooth water resistance was evaluated according to the following criteria, and an average value was determined.
5: There is no stickiness at all, and the brushed finger moves very smoothly.
4: Feels almost non-sticky and moves the finger smoothly.
3: Slightly feels sticky, but smooth fingers move smoothly.
2: A feeling of stickiness is felt slightly, and a finger that is rubbed is slightly caught.
1: Feeling sticky and feeling like a finger is caught.

Claims (6)

The following components (A) to (F):
(A) a linear saturated fatty acid having 12 to 22 carbon atoms,
(B) an organic base,
(C) an inorganic base,
(D) a linear saturated alcohol having 12 to 22 carbon atoms,
(E) containing highly polymerized silicone and (F) water,
The total amount of components (A) and (D) is (A) + (D) = 1-12% 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)] = 0.2-0. 7,
The molar ratio of the component (B) to the total amount [(B) + (C)] of the components (B) and (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 skin cosmetics.   The mass ratio of component (E) to component (A) and (D) total amount {(A) + (D)} is (E) / {(A) + (D)} = 0.01-0.5 The skin cosmetic according to claim 1.   The skin cosmetic according to claim 1 or 2, further comprising (G) 0.1 to 2% by mass of a nonionic surfactant.   The content of the component (A) is 0.5 to 6% by mass, the content of the component (B) is 0.01 to 5% by mass, the content of the component (C) is 0.01 to 5% by mass, and the component ( The skin cosmetic according to any one of claims 1 to 3, wherein the content of D) is 0.01 to 2% by mass.   The skin cosmetic according to any one of claims 1 to 4, wherein the component (B) is at least one selected from alkylamines, alkanolamines and basic amino acids.   The skin cosmetic according to any one of claims 1 to 5, wherein the component (C) is an alkali metal hydroxide.