JP2020147538A - Milky lotion-like skin cosmetic - Google Patents

Abstract

To provide a milky lotion-like skin cosmetic excellent in spreadability and lack of sagging in which the emulsified particles are uniform and fine.SOLUTION: There is provided a milky lotion-like skin cosmetic which comprises a component (A): a polyethylene glycol monostearate having an average addition molar number of ethylene oxide of 20 to 30, a component (B) a sorbitan monostearate, a component (C) a hydrogenated lecithin, a component (D) an acrylic acid-methacrylic acid alkyl copolymer, a component (E) an oil agent containing a vegetable fat and oil and a component (F) water, wherein the content of the component (D) is 0.16 to 0.23 mass%, the mass ratio [component (B)/component (A)] of the content of the component (B) to the content of the component (A) is 0.10 to 1.0 and the mass ratio [component (C)/component (A)] of the content of the component (C) to the content of the component (A) is 0.40 to 0.90.SELECTED DRAWING: None

Description

The present invention relates to a milky liquid cosmetic (milky skin cosmetic) applied to the skin and used.

Conventionally, as skin external preparations for the purpose of moisturizing the skin and preventing the skin from drying, various dosage forms such as lotion, gel, cream, and milky lotion are known. In particular, the milky lotion plays the role of skin care cosmetics to maintain and restore the homeostatic function of the skin, and also to supply water, moisturizer, oil, etc. to the skin to maintain the moisturizing function and softening function of the skin. Carry.

However, the structure of the skin surface is broken in the skin damaged by aging etc., and the emulsified particle size is small in order to recover the damage of the skin structure by cosmetics and improve the permeability, and the skin structure A close emulsion skin cosmetic is desirable.

As a method for preparing an emulsion skin cosmetic having a skin structure similar to that of the skin, a method of emulsifying with hydrogenated lecithin having a bilayer film structure (for example, Patent Document 1) can be mentioned, but a desirable feeling of use (good elongation and sagging) can be mentioned. It is very difficult to achieve both the lack of patentability and the reduction of the emulsified particle size.

Patent Document 2 describes an oil-in-water emulsified cosmetic that has excellent stability despite the fact that it contains a solid or paste-like vegetable oil at 25 ° C., but it has a feeling of use when used as an emulsion. Is not considered.

Japanese Unexamined Patent Publication No. 2014-218487 Japanese Unexamined Patent Publication No. 2016-166187

An object of the present invention is to provide a milky liquid skin cosmetic in which emulsified particles are uniform and fine, and have excellent spreadability and non-dripping despite containing hydrogenated lecithin and vegetable oil. ..

The present inventor describes the component (A): polyethylene glycol monostearate having an average addition molar number of 20 to 30 ethylene oxide, the component (B) sorbitan monostearate, the component (C) hydrogenated lecithin, and the component (D) acrylic. It contains an acid / alkyl methacrylate copolymer, an oil agent containing the component (E) vegetable oil and fat, and the component (F) water, and the content of the component (D) is 0.16 to 0.23% by mass. The mass ratio of the content of the component (B) to the content of the component (A) [component (B) / component (A)] is 0.10 to 1.0, and the content of the component (A) is contained. According to the emulsion skin cosmetics in which the mass ratio of the content of the component (C) to the amount [component (C) / component (A)] is 0.40 to 0.90, hydrogenated lecithin and vegetable fats and oils. The present invention has been completed by finding that an emulsion-like skin cosmetic having excellent spreadability and non-dripping can be obtained while the emulsified particles are uniform and fine.

That is, the present invention contains [1] the following component (A), the following component (B), the following component (C), the following component (D), the following component (E), and the following component (F). The content of (D) is 0.16 to 0.23% by mass, and the mass ratio of the content of the component (B) to the content of the component (A) [component (B) / component (A)]. Is 0.10 to 1.0, and the mass ratio of the content of the component (C) to the content of the component (A) [component (C) / component (A)] is 0.40 to 0.90. Milky skin cosmetics,
Component (A): Polyethylene glycol monostearate having an average addition mole number of ethylene oxide of 20 to 30 Component (B): Sorbitane monostearate Component (C): Hydrogenated lecithin Component (D): Acrylic acid / alkyl methacrylate Copolymer component (E): Oil agent containing vegetable fats and oils Component (F): Water [2] The emulsion according to [1], wherein the component (E) contains solid or paste-like vegetable fats and oils at 25 ° C. Skin cosmetics,
[3] The milky skin cosmetic according to [1] or [2], wherein the volume average particle diameter of the emulsified particles in the milky skin cosmetic is 2.0 to 20.0 μm.
[4] The milky lotion skin cosmetic according to any one of [1] to [3], which further comprises component (G): a higher alcohol.

According to the present invention, it is possible to provide an emulsion skin cosmetic in which the emulsified particles are uniform and fine, and have excellent elongation and non-dripping.

<Milk liquid skin cosmetics>
The milky lotion skin cosmetic according to the present embodiment includes polyethylene glycol monostearate, sorbitan monostearate, hydrogenated lecithin, an acrylic acid / alkyl methacrylate copolymer, and a plant, which have an average addition molar number of ethylene oxide of 20 to 30. Contains oil containing sex oil and water as essential ingredients. It also preferably contains higher alcohols. In the present specification, polyethylene glycol monostearate having an average addition molar number of 20 to 30 of ethylene oxide is referred to as "component (A)"; sorbitan monostearate is referred to as "component (B)"; hydrogenated lecithin is referred to as "component (B)". "Component (C)"; Acrylic acid / alkyl methacrylate copolymer is "Component (D)"; Oil containing vegetable fats and oils is "Component (E)"; Water is "Component (F)"; Higher alcohol is "Component (F)" It may be referred to as "component (G)".

The content of each of the above components contained in the milky skin cosmetic according to the present embodiment is within the range described so that the total content in the milky skin cosmetic is 100% by mass or less. It can be selected as appropriate. In this specification, when a numerical range is indicated by using "~", the numerical values at both ends thereof are included.

[Component (A): Polyethylene glycol monostearate having an average number of moles of ethylene oxide added of 20 to 30]
The milky lotion skin cosmetic according to the present embodiment contains polyethylene glycol monostearate having an average addition mole number of ethylene oxide of 20 to 30. The content of the component (A) in 100% by mass of the milky liquid skin cosmetic is preferably 0.40 to 1.6% by mass, more preferably 0.60 to 1.4% by mass, and 0.80 to 1. 2% by mass is more preferable. By setting the content of the component (A) in the above range, it is possible to improve the usability such as suppression of dripping and good elongation, and to reduce the emulsified particle size. Further, when the content is 0.40% by mass or more, the emulsion stability is further improved. From the viewpoint of safety, the content is preferably 1.6% by mass or less.

Examples of the commercially available product of the component (A) include the trade name "NIKKOL MYS-25V" (manufactured by Nippon Surfrant Industry Co., Ltd.).

[Component (B): Sorbitan monostearate]
The milky lotion skin cosmetic according to this embodiment contains sorbitan monostearate. The content of the component (B) in 100% by mass of the milky liquid skin cosmetic is preferably 0.10 to 1.2% by mass, more preferably 0.25 to 1.0% by mass, and 0.30 to 0. 90% by mass is more preferable. By setting the content of the component (A) in the above range, it is possible to improve the usability such as suppression of dripping and good elongation, and to reduce the emulsified particle size. Further, when the content is 0.1% by mass or more, the emulsion stability is further improved.

In the milky skin cosmetic according to the present embodiment, the mass ratio of the content of the component (B) to the content of the component (A) [component (B) / component (A)] is 0.10 to 1.0. Yes, 0.40 to 0.90 is preferable, and 0.60 to 0.90 is more preferable. The emulsion skin cosmetic according to the present embodiment uses the component (A) and the component (B) as surfactants, and the mass ratio of these is within the above-mentioned extremely narrow specific range, whereby vegetable oils and fats are used. It is possible to obtain a milky liquid skin cosmetic having a uniform and fine particle size of emulsified particles while containing the above. As shown in Examples described later, when the mass ratio is out of the above range, the particle size of the emulsified particles is non-uniform, or even if they are uniform, the particle size is large. This is because when the mass ratio of the component (A) and the component (B) fluctuates slightly, the HLB value of the mixture of the component (A) and the component (B) fluctuates greatly, which greatly affects the dispersed state of the vegetable oil. It is presumed that this is to do so.

[Component (C): Hydrogenated lecithin]
The milky lotion skin cosmetic according to this embodiment contains hydrogenated lecithin. By blending the component (C) into a milky skin cosmetic, a milky skin cosmetic having a skin structure close to that of the skin structure can be obtained.

Examples of the hydrogenated lecithin that can be used in the present embodiment include those obtained by hydrogenating lecithin derived from an animal or a plant. Among them, hydrogenated soybean lecithin and hydrogenated egg yolk lecithin are preferable, and hydrogenated soybean lecithin is more preferable, from the viewpoint of further improving skin compatibility and stability.

The content of the component (C) in 100% by mass of the milky liquid skin cosmetic is preferably 0.10 to 0.80% by mass, more preferably 0.25 to 0.70% by mass, and 0.30 to 0. 60% by mass is more preferable. By setting the content of the component (C) in the above range, it is possible to improve the usability such as suppression of sagging and good elongation, and to reduce the emulsified particle size. Further, when the content is 0.10% by mass or more, the effect of the present invention can be sufficiently obtained by blending hydrogenated lecithin. From the viewpoint of reducing the influence of odor and color derived from the raw material, the content is preferably 0.80% by mass or less.

In the milky skin cosmetic according to the present embodiment, the mass ratio of the content of the component (C) to the content of the component (A) [component (C) / component (A)] is 0.40 to 0.90. Yes, 0.50 to 0.80 is preferable, and 0.60 to 0.70 is more preferable. By setting these mass ratios within the above-mentioned extremely narrow specific range, it is possible to improve the usability such as suppression of sagging and good elongation, and to reduce the diameter of emulsified particles.

The total content of the component (A), the component (B) and the component (C) in 100% by mass of the emulsion skin cosmetic is preferably 0.6% by mass or more from the viewpoint of the stability of the emulsified particles. 0% by mass or more is more preferable, and 1.2% by mass or more is further preferable. Further, from the viewpoint of suppressing stickiness, 3.6% by mass or less is preferable, 3.0% by mass or less is more preferable, and 2.5% by mass or less is further preferable.

[Component (D): Acrylic acid / alkyl methacrylate copolymer]
The milky liquid skin cosmetic according to the present embodiment contains an acrylic acid / alkyl methacrylate copolymer. By blending the component (D), the alkyl moiety in the component (D) penetrates into the emulsified particles while thickening the aqueous phase in the emulsion, and stabilizes the emulsified particles in a state where the particle size is uniform and fine.

Examples of commercially available products of the component (D) include the product name "PEMULEN TR-1", the product name "PEMULEN TR-2", the product name "carbomer 1342", the product name "carbomer 1382", and the product name "ETD2020". (The above is manufactured by LUBRIZOL) and the like.

The content of the component (D) in 100% by mass of the milky liquid skin cosmetic is 0.16 to 0.23% by mass, preferably 0.17 to 0.21% by mass, and 0.18 to 0.20. More preferably by mass. When the content is 0.16% by mass or more, the stability of the emulsion in a state where the particle size of the emulsified particles is fine and uniform is further improved. In addition, the milky lotion skin cosmetic can be made to have an appropriate viscosity, and it is difficult for the emulsion to drip from the hand at the time of application. When the content is 0.23% by mass or less, the elongation of the emulsion skin cosmetics is further improved.

[Ingredient (E): Oil containing vegetable oil]
The component (E) is an oil agent containing vegetable oils and fats. The milky lotion skin cosmetic according to the present embodiment is excellent in easy compatibility with the skin at the time of application by blending vegetable oils and fats as an oil agent. Vegetable oils and fats include, for example, macadamia nut oil, eucalyptus oil, palm oil, avocado oil, saflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, shea butter (shear butter), cacao butter, almond oil, sunflower. Oil, rose hip oil, olive squalane, camellia oil, kiwi fruit seed oil, camellia oil, apricot oil, sesame oil, soybean oil, jojoba oil, castor oil, hazelnut oil, medhome oil, peppermint oil, carrot oil, lavender oil, sugar Squalane, damask rose flower wax, centifolia rose flower wax, sokei flower wax, these hydrogenated additives (eg hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated avocado oil, hydrogenated soybean oil, etc. ) Etc. can be mentioned.

The vegetable oils and fats preferably contain solid or paste-like vegetable oils and fats at 25 ° C. from the viewpoint of enhancing the familiarity with the skin at the time of application and improving the moisturizing effect. Examples of the vegetable oil and fat in the form of a solid or paste at 25 ° C. include shea butter, damask rose flower wax, centifolia rose flower wax, and sokei flower wax.

Commercially available vegetable oils and fats include, for example, the product name "Macadamia Nut Oil" (made by Macadamia Nut Oil, Claude Japan Co., Ltd.), the product name "Super MC Oil" (made by Macadamia Nut Oil, Nikko Rika Co., Ltd.) "NIKKOL macadamia nut oil" (macadamia nut oil, manufactured by Nikko Chemicals Co., Ltd.), product name "refined macadamia oil" (macadamia nut oil, manufactured by Nichiyu Co., Ltd.), product name "Cropure SB", product name "Cropure Liquid" "Vegilan" (above, shea fat, manufactured by Claude Japan Co., Ltd.), product name "Shea Butter RF" (shear fat, manufactured by higher alcohol industry), product name "Eco Oil RS" (jojoba oil, higher alcohol industry) (Made by Co., Ltd.), Product name "Cropure Johoba" (Johova oil, manufactured by Crowder Japan Co., Ltd.), Product name "NIKKOL Johoba wax" (Hydrogenized jojoba oil, manufactured by Nikko Chemicals Co., Ltd.), Product name "NIKKOL Trifat" Examples include "P-52" (hydrogenated palm oil, manufactured by Nikko Chemicals Co., Ltd.), trade name "Nomcoat PHS" (hydrogenized palm oil, manufactured by Nisshin Oillio Group Co., Ltd.) and the like.

The content of the component (E) in 100% by mass of the milky liquid skin cosmetic is preferably 5.0 to 20.0% by mass, more preferably 6.0 to 15.0% by mass, and 7.0 to 12. 0% by mass is more preferable, and 8.0 to 10.0% by mass is particularly preferable. When the content is 5.0% by mass or more, the moisturizing feeling is more excellent. When the content is 20.0% by mass or less, it is less sticky. Further, when the content is within the above range, the stability of the emulsion is further improved, and the particle size of the emulsified particles tends to be finer and more uniform.

The content of the solid or paste-like vegetable fats and oils at 25 ° C. in 100% by mass of the milky liquid skin cosmetic is not particularly limited, but is preferably 0.05 to 5.0% by mass, and 0.10 to 3. 0% by mass is more preferable, and 0.25 to 2.5% by mass is further preferable. When the content is 0.05% by mass or more, the feeling of use as a milky lotion is superior to the feeling of use like water, and the feeling of moisturizing is more excellent. Further, when the content is 5.0% by mass or less, it is less sticky.

The component (E) may contain an oil agent (other oil agent) other than vegetable oils and fats. Examples of the other oils include ester oils, silicone oils, hydrocarbon oils, waxes, higher fatty acids and the like.

Examples of the ester oil include ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, 2-ethylhexyl palmitate, octyldodecyl myristate, isopropyl isostearate, propylene glycol isostearate, 2-. Cetyl ethylhexanate, glyceryl tri-2-ethylhexanoate, glyceryl tri (caprylic acid / capric acid), isononyl isononanoate, diisopropyl adipate, pentaerythrityl tetraoctanoate, pentaerythrit tetraisostearate, diisolotate Stearyl, erythricyl triethylhexarate, 2-ethylhexyl hydroxystearate, hexa (hydroxystearic acid / stearic acid / logonic acid) dipentaerythrityl, tetra (hydroxystearic acid / isostearic acid) dipentaerythrityl, dipentaerythrityl hexahydroxystearate, (ethylhexanoic acid / Examples thereof include stearic acid / adipic acid) glyceryl, tri (caprylic acid / capric acid / myristic acid / stearic acid) glyceryl, hexa (bechenic acid / benzoic acid / ethylhexanoic acid) dipentaerythrityl and the like.

The silicone oil is not particularly limited, but for example, dimethyl silicone oil such as methylpolysiloxane and highly polymerized methylpolysiloxane; methylphenylsilicone oil such as methylphenylpolysiloxane; methylcyclopolysiloxane, octamethylcyclotetrasiloxane, and the like. Cyclic silicone oils such as decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane; aminopropylmethylsiloxane / dimethylsiloxane copolymer, aminoethylaminopropylsiloxane / dimethylsiloxane copolymer, aminoethylaminopropylmethylsiloxane / dimethylsiloxane 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; methylhydrogenpolysiloxane, dimethiconol, etc. Can be mentioned.

Examples of the hydrocarbon oil include α-olefin oligomer, mineral oil, petrolatum, light isoparaffin, light liquid isoparaffin, squalane, synthetic squalane, vegetable squalane, liquid isoparaffin, and liquid paraffin.

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

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

The component (E) preferably contains an ester oil and / or a hydrocarbon oil as the other oil agent. When the component (E) contains an ester oil and / or a hydrocarbon oil, the stability of the emulsion is further improved, and the particle size of the emulsified particles tends to be finer and more uniform.

The total content of oils (particularly ester oils and hydrocarbon oils) other than vegetable oils and fats in 100% by mass of emulsion skin cosmetics is not particularly limited, but is preferably 3.0 to 10.0% by mass, 4 .0 to 8.0% by mass is more preferable. When the content is 3.0% by mass or more, the stability of the emulsion is further improved, and the particle size of the emulsified particles tends to be finer and more uniform. When the content is 10.0% by mass or less, it is less sticky.

[Component (F): Water]
The milky lotion skin cosmetic according to this embodiment contains water. Examples of the water used in the present embodiment include ion-exchanged water, ultrafiltration water, reverse osmosis water, pure water such as distilled water, and ultrapure water.

The content of the component (F) in the milky skin cosmetic according to the present embodiment is not particularly limited, and the components (A), (B), (C), (D), (E) and other components are not particularly limited. The balance excluding the above can be used as the content thereof. The content of the component (F) in 100% by mass of the milky liquid skin cosmetic is not particularly limited, but is preferably 60.0 to 95.0% by mass, more preferably 70.0 to 90.0% by mass, and 75. .0 to 85.0% by mass is more preferable.

[Ingredient (G): higher alcohol]
The milky lotion skin cosmetic according to the present embodiment preferably contains a higher alcohol. The emulsion skin cosmetic according to the present embodiment is in a state where the emulsified particles are more stabilized by blending the component (G) together with the component (A) and the component (B), and the particle size of the emulsified particles is uniform and fine. Can be. As the component (G), an alcohol having 12 to 22 carbon atoms is preferable, and an alcohol having 14 to 22 carbon atoms is more preferable. Specific examples of the higher alcohol include cetyl alcohol, stearyl alcohol, isostearyl alcohol, myristyl alcohol, 2-octyldodecanol, oleyl alcohol and the like, and stearyl alcohol is preferable.

The content of the component (G) in 100% by mass of the milky liquid skin cosmetic is preferably 0.30 to 1.5% by mass, more preferably 0.45 to 1.2% by mass, and 0.50 to 1. 0% by mass is more preferable. When the content is 0.30% by mass or more, the stability of the emulsion in a state where the particle size of the emulsified particles is fine and uniform is further improved. When the content is 1.5% by mass or less, the smoothness at the time of coating is improved.

[Other ingredients]
The milky skin cosmetic according to the present embodiment may contain components (other components) other than the above components (A) to (G). The other ingredients are not particularly limited, and examples thereof include ingredients usually used in cosmetics and quasi-drugs. Specifically, for example, lower alcohols such as ethanol; polyhydric alcohols; thickeners such as carboxyvinyl polymer, hydroxymethyl cellulose and hydroxypropyl methyl cellulose; anti-inflammatory agents such as glycyrrhizinic acid and salts thereof; refreshing agents such as menthol; PH adjusters such as phosphoric acid and its salts, citric acid and its salts, lactic acid and its salts, sodium hydroxide, triethanolamine, etc .; fragrances; ultraviolet absorbers; antioxidants; metal ion sequestering agents; film-forming polymers Compounds; powders; pigments; pigments; vitamins; amino acids; astringents; whitening agents; animal and plant extracts; acids; alkalis and the like. In addition, those contained in the above-mentioned components (A) to (G) shall be excluded from the above-mentioned other components.

The polyhydric alcohol is not particularly limited, and examples thereof include glycols, glycerins, and sugar alcohols. The glycol is not particularly limited, but for example, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,3-propanediol, dipropylene glycol, isoprene glycol, 1,3-butylene glycol, 1,2-butane. Examples thereof include diol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol, and polyethylene glycol. The glycerins are not particularly limited, and examples thereof include glycerin, diglycerin, and polyglycerin. The sugar alcohol is not particularly limited, and examples thereof include sorbitol, maltitol, and trehalose.

The viscosity of the milky lotion skin cosmetic according to the present embodiment at 25 ° C. is preferably 5.0 Pa · s or more, and more preferably 6.0 Pa · s or more from the viewpoint of preventing dripping. Further, from the viewpoint of good elongation, 15.0 Pa · s or less is preferable, and 10.0 Pa · s or less is more preferable. The viscosity (Pa · s) was determined by a B-type viscometer at a temperature of 25 ° C. and a rotor No. 4 is used and measured under the condition of a rotation speed of 30 rpm. The viscosity (Pa · s) can be measured using, for example, the trade name “TV-25 type viscometer” (manufactured by Toki Sangyo Co., Ltd.).

The average particle size of the emulsified particles in the emulsion skin cosmetic according to the present embodiment is preferably 2.0 μm or more, more preferably 3.0 μm or more, still more preferably 4.0 μm or more, from the viewpoint of preventing dripping. Further, from the viewpoint of good elongation, 20.0 μm or less is preferable, 15.0 μm or less is more preferable, and 10.0 μm or less is further preferable. According to the milky liquid skin cosmetic according to the present embodiment, the particle size of the emulsified particles can be made uniform and fine while containing vegetable oils and fats, so that the particle size of the emulsified particles is within the above range. It is possible. The average particle size of the emulsified particles is a volume average particle size, which is a value that can be measured by using a particle size distribution measuring device by laser light diffraction. Examples of the particle size distribution measuring device include "LA-950V2" manufactured by HORIBA, Ltd.

From the viewpoint of stabilizing the particle size of the emulsified particles in a uniform and fine state, the content of the component (A) and the component (B) with respect to 100% by mass of the total surfactant in the emulsion skin cosmetic according to the present embodiment. ) Is preferably 90.0% by mass or more (for example, 90.0 to 100% by mass), more preferably 95.0% by mass or more, further preferably 98.0% by mass or more, and 99.9% by mass. By mass or more is particularly preferable, and 100% by mass is most preferable. That is, the milky lotion skin cosmetic according to the present embodiment does not substantially contain a surfactant (sometimes referred to as "other surfactant") other than the component (A) and the component (B). preferable.

Examples of the other surfactant include known or commonly used anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants excluding the component (A) and the component (B). Examples of the anionic surfactant include higher fatty acid soap, alkyl sulfate, alkyl phosphate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate, alkyl ether phosphate, and alkyl ether carboxylate. , Acylmethyl taurine salt, N-acyl-N-methyl-β-alanine salt, N-acylglycine salt, N-acylglutamate, polyoxyethylene alkylcarboxylate, alkylphenyl ether sulfonate, alkylsulfosuccinic acid and Examples thereof include the salt, N-acylsarcosine and its salt, polyoxyethylene palm oil fatty acid monoethanolamide sulfate and the like. Examples of the cationic surfactant include amine salts such as alkylamine salts, fatty acid amidamine salts, and ester-containing tertiary amine salts; monoalkyl-type quaternary ammonium salts, dialkyl-type quaternary ammonium salts, and trialkyl-type quaternary ammonium salts. Alkyl quaternary ammonium salts such as benzalconium type quaternary ammonium salts; cyclic quaternary ammonium salts such as alkyl pyridinium salts; benzethonium chloride and the like can be mentioned. Examples of the nonionic surfactant include sorbitan fatty acid ester, glycerin fatty acid ester, and alkylene oxide adducts thereof, polyoxyalkylene alkyl ether, polyoxyalkylene fatty acid ester, polyoxyalkylene alkyl phenol, polyoxyethylene sorbit fatty acid ester, and polyoxy. Examples thereof include ethylene alkylphenyl formaldehyde condensate, polyoxyethylene sterol and its derivatives, polyoxyethylene lanolin and its derivatives, polyoxyethylene beeswax derivatives, sugar esters, polyoxyethylene cured castor oil, polyoxyethylene castor oil and the like. Examples of the amphoteric surfactant include glycine-type amphoteric surfactants such as alkylglycine salt, carboxymethyl glycine salt, and N-acylaminoethyl-N-2-hydroxyethyl glycine salt; alkylaminopropionate and alkyliminodipropion. Aminopropionic acid-type amphoteric surfactants such as acid salts, aminoacetic acid betaine-type amphoteric surfactants such as alkyldimethylaminoacetate betaine and fatty acid amide propyldimethylaminoacetic acid betaine; sulfobetaine-type amphoteric surfactants such as alkylhydroxysulfobetaine. And so on.

The milky lotion skin cosmetic according to the present embodiment is not particularly limited, and can be produced by a known or conventional method. For example, a method of mixing each of the above components and stirring with a homomixer to homogenize each component can be mentioned.

The milky lotion skin cosmetic according to this embodiment is used as, for example, cosmetics, quasi-drugs, pharmaceuticals, miscellaneous goods and the like. Specifically, it is preferably used for face care milk (moisturizing face care milk, etc.), body milk, etc. (moisturizing body milk, etc.).

The site to which the milky skin cosmetic according to the present embodiment is applied is not particularly limited, and for example, the face (forehead, eyes, eyes, cheeks, mouth, etc.), body (arms, elbows, back of hands, fingertips, feet, etc.) Knees, heels, neck, sides, back, etc.). Above all, the body is particularly preferable. The milky liquid skin cosmetic according to the present embodiment is preferably a milky skin cosmetic for the body (particularly, body milk).

The milky liquid skin cosmetic according to the present embodiment contains water [component (F)] and uses an oil agent [component (E)] containing vegetable oil as an oil agent for imparting a moisturizing feeling. In addition, it has excellent compatibility with the skin. However, when trying to prepare an emulsion skin cosmetic containing vegetable fats and oils, the stability of the emulsified particles is extremely low compared to the case where other oils are used, and the particles are not emulsified or emulsified even if emulsified. There is a problem that the particle size of the particles becomes non-uniform, and even if the particle size is uniform, the particle size of the emulsified particles is large. On the other hand, the milky lotion skin cosmetic according to the present embodiment has an average molar addition number of ethylene oxide of 20 to 30 among many surfactants as a surfactant for forming a film of emulsified particles. Two specific types of polyethylene glycol monostearate [component (A)] and sorbitan monostearate [component (B)] are used, and the mass ratio [component (B) / component (A)] of these is set to 0.10. By setting the particle size within an extremely narrow range of ~ 1.0, the particle size of the emulsified particles can be stably and finely adjusted. Furthermore, the acrylic acid / alkyl methacrylate copolymer [component (D)] and the higher alcohol [component (G)] further stabilize the state in which the emulsion has a fine and uniform particle size of the emulsified particles. ..

The emulsion-based skin cosmetic according to the present embodiment was used by filling it in a pump dispenser container from the viewpoint that the particle size of the emulsified particles is uniform and fine, and the viscosity can be adjusted appropriately while maintaining this state. In some cases, it can be easily discharged. Therefore, by filling the pump dispenser container with the milky skin cosmetic according to the present embodiment, a milky lotion composed of the pump dispenser container and the milky skin cosmetic according to the present embodiment filled in the container. It can be a skin cosmetic product.

Hereinafter, the present invention will be described in more detail based on Examples, but the present invention is not limited to these Examples. Unless otherwise specified, the blending amount is the blending amount of the active ingredient and is represented by "mass%".

Hereinafter, various materials used in Examples and Comparative Examples are collectively shown.
Polyethylene glycol monostearate (25EO): Trade name "NIKKOL MYS-25V" (average number of moles of ethylene oxide added: 25, manufactured by Nippon Surfartant Industries, Ltd.)
Sorbitan monostearate: Product name "NIKKOL SS-10V" (manufactured by Nippon Surfant Industry Co., Ltd.)
Hydrogenated lecithin: Product name "NIKKOL Lecithin S-10" (manufactured by Nikko Chemicals Co., Ltd.)
Acrylic acid / alkyl methacrylate copolymer: Product name "Carbomer 1382" (manufactured by LUBRIZOL)
Vaseline: Product name "WHITE PROTOPET 1S" (manufactured by Sonneborn Inc)
Mineral oil: Product name "CARNATION" (manufactured by Sonneborn Inc)
Shea butter: Product name "Star Shea Butter refined" (manufactured by IMCD Group BV)
Macadamia nut oil: Product name "Macadamia nut oil" (manufactured by Summit Oil Co., Ltd.)
Glyceryl tri-2-ethylhexanoate: Product name "Exepearl TGO" (manufactured by Kao Corporation)
Stearyl alcohol: Product name "Calcol 8688" (manufactured by Kao Corporation)
Concentrated glycerin: Product name "Cosmetic concentrated glycerin" (manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.)
Disodium edetate: Product name "Dizorbin NA2-S" (manufactured by Lion Specialty Chemicals Co., Ltd.)

<Volume average particle size and standard deviation of emulsified particles>
For the emulsion skin cosmetics of Examples and Comparative Examples prepared according to the composition (blending amount) shown in Table 1, the volume average particle diameter and standard deviation of the emulsified particles were measured by a particle size distribution measuring device (Co., Ltd.) by laser light diffraction. The measurement was performed using LA-950V2) manufactured by Horiba Seisakusho.
(Average particle size)
A: 2.0 μm or more and 10.0 μm or less B: 10.0 μm or more and 20.0 μm or less C: 20.0 μm or more (standard deviation)
A: 10.0 or less B: 10.0 or more and 20.0 or less C: More than 20.0 (determined to be non-uniform)

<Viscosity>
The milky liquid skin cosmetics of Examples and Comparative Examples prepared according to the composition (blending amount) shown in Table 1 were described below using a B-type viscometer (TV-25 type viscometer) manufactured by Toki Sangyo Co., Ltd. The viscosity (Pa · s) was measured under the conditions of.
Temperature: 25 ° C
Measurement conditions: Rotor No. 4
Rotation speed: 30 rpm
C1: Less than 5.0 Pa · s (easy to drip)
B: 5.0 Pa · s or more and less than 10.0 Pa · s (usable)
A: 10.0 Pa · s or more and 15.0 Pa · s or less (good)
C2: Over 15.0 Pa · s (poor growth)

<Evaluation of usability>
1 g of the milky skin cosmetics of Examples and Comparative Examples prepared according to the composition (blending amount) shown in Table 1 was applied to the inner part of the upper arm, and the non-dripping and the goodness of elongation were sensually evaluated. The evaluation was conducted by a panel of two specialists.
A (excellent): Emulsion skin cosmetics do not drip and spread well.
B (good): There is almost no dripping of milky skin cosmetics, and the growth is normal.
C (defective): Milky skin cosmetics drips. Or the cosmetics are hard and do not stretch.

From the results in Table 1, it can be seen that the emulsion skin cosmetic of the present invention has uniform and fine emulsified particles, and is excellent in good spreadability and non-dripping. In Comparative Example 9, the emulsified particles were separated and the viscosity could not be measured.

An example of prescribing the emulsion skin cosmetic of the present invention is shown below.
Formulation Example Body Milk Polyethylene Glycol Monostearate (25EO) 0.80% by mass
Sorbitan monostearate 0.70% by mass
Hydrogenated lecithin 0.50% by mass
Vaseline 2.00% by mass
Shea fat 1.00% by mass
Beeswax 1.50% by mass
Squalene 4.00% by mass
Macadamia nut oil 1.00% by mass
Acrylic acid / alkyl methacrylate copolymer 0.20% by mass
Cetanol 0.80% by mass
1,3-butylene glycol 4.00% by mass
Phenoxyethanol 0.20% by mass
Potassium hydroxide Appropriate amount Disodium edetate Appropriate amount Fragrance Appropriate amount Purified water Total balance 100% by mass

The milky lotion skin cosmetic according to the present embodiment can be used as a milky lotion skin cosmetic having uniform and fine emulsified particles and excellent spreadability and non-dripping.

Claims (4)

It contains the following component (A), the following component (B), the following component (C), the following component (D), the following component (E), and the following component (F).
The content of the component (D) is 0.16 to 0.23% by mass.
The mass ratio of the content of the component (B) to the content of the component (A) [component (B) / component (A)] is 0.10 to 1.0.
A milky liquid skin cosmetic in which the mass ratio of the content of the component (C) to the content of the component (A) [component (C) / component (A)] is 0.40 to 0.90.
Component (A): Polyethylene glycol monostearate having an average addition molar number of ethylene oxide of 20 to 30 Component (B): Sorbitane monostearate Component (C): Hydrogenated lecithin Component (D): Acrylic acid / alkyl methacrylate Copolymer component (E): Oil containing vegetable fats and oils Component (F): Water The milky liquid skin cosmetic according to claim 1, wherein the component (E) contains a solid or paste-like vegetable oil at 25 ° C. The milky skin cosmetic according to claim 1 or 2, wherein the volume average particle diameter of the emulsified particles in the milky skin cosmetic is 2.0 to 20.0 μm. The milky liquid skin cosmetic according to any one of claims 1 to 3, further comprising an ingredient (G): a higher alcohol.