KR20210016403A - Cosmetic - Google Patents

Abstract

The present invention provides a cosmetic with excellent aesthetics by stably presenting two water layers and an oil layer.
Component (A): dextran having a number average molecular weight of 50,000 to 300,000, component (B): polyethylene glycol having a number average molecular weight of 4000 to 30,000, component (C): electrolyte, component (D): ionic surfactant, Component (E): water, and component (F): containing an oily component, the content ratio of the component (A) to the total amount of the cosmetic excluding the component (F) is 2.0 to 10.0 mass%, the component ( It is a cosmetic in which the content ratio of B) is 2.0 to 10.0 mass%, and the content ratio of the component (C) is 0.05 to 1.4 mass%.

Description

Cosmetic

The present invention relates to a cosmetic. More specifically, the present invention relates to a three-layer cosmetic composition in which two layers of water and oil layers are stably present.

BACKGROUND ART Conventionally, from the viewpoint of enhancing functionality and aesthetics, a cosmetic composition of a multilayer type (multilayer type) in which the appearance is separated into two or three layers is known. As the most common two-layer cosmetic composition, a two-layer cosmetic composition separated into an oil layer and a water layer (see Patent Document 1), and a two-layer cosmetic composition of an oil layer and an oil layer (see Patent Document 2) are known. In addition, as a three-layer cosmetic, for example, a three-layer cosmetic composed of an oil layer, a surfactant layer, and a water layer (see Patent Documents 3 and 4), and a three-layer cosmetic composed of an oil layer, a surfactant layer, and a polyhydric alcohol layer (Patent Document 5 Reference), oil layer-oil layer-water layer three-layer cosmetic, etc. are known. In addition, there are also many cosmetics called two-layer type by the powder sedimentation layer and the water layer.

Japanese Unexamined Patent Publication No. 2013-139411 Japanese Unexamined Patent Publication No. 2004-115485 Japanese Unexamined Patent Publication No. 2005-206557 Japanese Unexamined Patent Publication No. 2008-290960 Japanese Unexamined Patent Application Publication No. Hei 4-290810

However, in a multilayer cosmetic, it was difficult to stably present two or more water layers. Conventionally, a method of forming two or more water layers by blending two or more different polymers in an aqueous layer and using the exclusion volume effect between the polymers has been known, but from the viewpoint of exhibiting a sufficient exclusion volume effect, the molecular weight is large and It was a mixture of a relatively high concentration of polymer. For this reason, a composition having two or more water layers as described above did not have a suitable feeling of use as a skin cosmetic. In addition, cosmetics having two or more water layers and oil layers have not been known until now.

Accordingly, it is an object of the present invention to provide a cosmetic with excellent aesthetics by stably presenting two water layers and an oil layer.

The present inventors, as a result of earnestly examining in order to achieve the above object, contained a specific dextran, a specific polyethylene glycol, and an electrolyte in a specific ratio, respectively, and a cosmetic comprising an ionic surfactant, water, and an oily component. According to the results, it was found that the two layers of the water layer and the oil layer exist stably, so that a cosmetic composition excellent in aesthetics can be obtained. The present invention was accomplished based on these findings.

That is, the present invention contains the following component (A), the following component (B), the following component (C), the following component (D), the following component (E), and the following component (F), and the component (F) The content ratio of the component (A) is 2.0 to 10.0 mass%, the content ratio of the component (B) is 2.0 to 10.0 mass%, and the content ratio of the component (C) is 0.05 to 1.4 A cosmetic composition of mass% is provided.

Component (A): Dextran having a number average molecular weight of 50,000 to 300,000

Component (B): Polyethylene glycol having a number average molecular weight of 4000 to 30,000

Component (C): electrolyte

Component (D): ionic surfactant

Ingredient (E): water

Component (F): oily component.

It is preferable that the said cosmetic material further contains the following component (G).

Component (G): at least one polyhydric alcohol selected from the group consisting of polyoxyalkylene alkylglucoside, propylene glycol, dipropylene glycol, and polyethylene glycol having a number average molecular weight of 2000 or less.

It is preferable that the said cosmetic does not contain a nonionic surfactant substantially.

According to the cosmetic of the present invention, two layers of water and an oil layer are stably present to obtain a cosmetic with excellent aesthetics. For this reason, the cosmetic composition of the present invention can be used as a cosmetic composition having excellent aesthetics and excellent usability. In particular, stickiness when applied to the skin can be suppressed.

1 is a schematic diagram showing an embodiment of the appearance of the cosmetic composition of the present invention.

The cosmetic of the present invention contains at least dextran having a number average molecular weight of 50,000 to 300,000, polyethylene glycol having a number average molecular weight of 4000 to 30,000, an electrolyte, an ionic surfactant, water, and an oily component. In addition, in the present specification, dextran having a number average molecular weight of 50,000 to 300,000 is referred to as "component (A)", polyethylene glycol having a number average molecular weight of 4000 to 30,000 is referred to as "component (B)", and the electrolyte is referred to as "component (C). )", ionic surfactant as "component (D)", water as "component (E)", and oily component as "component (F)" in some cases.

It is preferable that the cosmetic of the present invention further contains at least one polyhydric alcohol selected from the group consisting of polyoxyalkylene alkyl glucoside, propylene glycol, dipropylene glycol, and polyethylene glycol having a number average molecular weight of 2000 or less. In addition, in the present specification, the "polyoxyalkylene alkyl glucoside, propylene glycol, dipropylene glycol, and at least one polyhydric alcohol selected from the group consisting of polyethylene glycol having a number average molecular weight of 2000 or less" is referred to as "component (G). It may be called "".

That is, the cosmetic composition of the present invention contains at least a component (A), a component (B), a component (C), a component (D), a component (E), and a component (F). It is preferable that the cosmetic of the present invention further contains the component (G). The cosmetic of the present invention may contain components other than the components (A) to (G). In addition, each component contained in the cosmetic of the present invention, for example, component (A), component (B), component (C), component (D), component (E), component (F), component (G) And each component, such as another component, may use only 1 type, respectively, and may use 2 or more types.

The cosmetic of the present invention is placed in a container and allowed to stand for a certain period of time, so that the appearance becomes a multi-layered type including two water layers and an oil layer (for example, a three-layer type of two water layers and one oil layer). In more detail, for example, as shown in FIG. 1, the cosmetic composition (X) of the present invention is in the order of the oil layer (1)/water layer (2)/water layer (3) from the top in the container 4 It is a three-layer cosmetic product with a layered layer. For example, the aqueous layer 2 is an aqueous layer containing polyethylene glycol having a number average molecular weight of 40 to 30,000, and the aqueous layer 3 is an aqueous layer containing dextran having a number average molecular weight of 50,000 to 300,000.

In the case of a three-layer type of oil layer/aqueous layer/water layer, the cosmetic of the present invention becomes an emulsion when stirred in a container, so that it can be used as a cosmetic. In addition, by being a three-layer type having such a structure, it is possible to suppress stickiness at the time of application, slipperiness, and irritation to the skin, unlike skin cosmetics having a surfactant layer. In addition, the three-layer cosmetic composition having two oil layers has a problem that an oil film sensation occurs because the blending amount of the oily component is relatively large, but the cosmetic composition of the present invention can also suppress such a problem. In addition, after emulsification, the cosmetic composition of the present invention has excellent re-separation property into three layers after use, and by standing for a certain period of time, the interface of each layer appears, and the appearance is again a three-layer type.

[Component (A)]

Component (A) is dextran having a number average molecular weight of 50,000 to 300,000. As for component (A), only 1 type may be used and 2 or more types may be used.

The number average molecular weight of component (A) is 50,000 to 300,000, preferably 50,000 to 220,000. When the number average molecular weight is 50,000 or more, the exclusion volume effect for the component (B) increases, and a two-layer water layer can be formed. When the number average molecular weight is 300,000 or less, stickiness when a cosmetic is applied to the skin can be suppressed, and the usability as a cosmetic is excellent.

In addition, in this specification, the number average molecular weight can be measured, for example by gel permeation chromatography (GPC).

As the component (A), a commercial item can be used. As a commercial item of the component (A), a brand name "polymer dextran EH", a brand name "dextran 70" (above, manufactured by Meito Sangyo Co., Ltd.), etc. are mentioned, for example.

The content ratio of the component (A) in the cosmetic of the present invention is 2.0 to 10.0 mass with respect to 100% by mass of the total amount of the cosmetic of the present invention excluding component (F) (that is, the total amount of each component other than component (F)) %, preferably 2.5 to 8.0 mass%, more preferably 3.0 to 5.0 mass%. When the content ratio is 2.0% by mass or more, a two-layer water layer can be stably formed. When the content ratio is 10.0 mass% or less, stickiness when a cosmetic is applied to the skin can be suppressed, and the usability as a cosmetic is excellent. The content ratio of the component (A) is the sum of the content ratios of all components (A) in the cosmetic composition of the present invention.

[Component (B)]

Component (B) is polyethylene glycol with a number average molecular weight of 4000 to 30,000. As for component (B), only 1 type may be used and 2 or more types may be used.

The number average molecular weight of the component (B) is 4000 to 30,000, preferably 6000 to 25000, and more preferably 10,000 to 20,000. When the number average molecular weight is 4000 or more, the effect of the volume rejection on the component (A) increases, and a two-layer water layer can be formed. When the number average molecular weight is 30,000 or less, stickiness when a cosmetic is applied to the skin can be suppressed, and the usability as a cosmetic is excellent.

As the component (B), a commercial item can be used. As a commercial item of component (B), for example, a brand name "PEG #20000", a brand name "PEG #11000", a brand name "PEG #6000" (above, manufactured by Nichiyu Corporation), a brand name "Brownone PEG-" 20000S" (manufactured by Yushi Aoki High School Co., Ltd.), etc. are mentioned.

The content ratio of the component (B) in the cosmetic of the present invention is 2.0 to 10.0% by mass, preferably 2.0 to 8.0% by mass, more preferably, based on 100% by mass of the total amount of the cosmetic of the present invention excluding component (F). It is 2.0 to 5.0 mass %. When the content ratio is 2.0% by mass or more, a two-layer water layer can be stably formed. When the content ratio is 10.0 mass% or less, stickiness when a cosmetic is applied to the skin can be suppressed, and the usability as a cosmetic is excellent. The content ratio of the component (B) is the sum of the content ratios of all components (B) in the cosmetic composition of the present invention.

The cosmetic composition of the present invention contains the component (A) and the component (B) in the above content ratios, so that the aqueous layer containing the component (A) and the component (A) are obtained by the exclusion volume effect of the component (A) and the component (B). It can be separated into an aqueous layer containing component (B).

[Component (C)]

Component (C) is an electrolyte. The cosmetic composition of the present invention, by including the component (C), promotes the floatation (creaming) of the oily component of the emulsion when the emulsion is formed by stirring and then allowed to stand for a certain period of time, thereby consolidating the creaming and the emulsion. It has excellent aesthetics when returning to a multi-layered manner because the speed of the can be adjusted. As for component (C), only 1 type may be used and 2 or more types may be used.

Although it does not specifically limit as a component (C), For example, a metal salt (for example, a monovalent metal salt, a divalent or more polyvalent metal salt, etc.) etc. are mentioned. The metal salt may be an inorganic salt or an organic salt. Examples of the metal salt include sodium salt, potassium salt, calcium salt, magnesium salt, zinc salt, ammonium salt, and aluminum salt. As the component (C), specifically, zinc paraphenolsulfonate, sodium chloride, potassium chloride, calcium chloride, magnesium chloride, magnesium sulfate, alum, sodium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, ammonium chloride, sodium phosphate, phosphoric acid Disodium hydrogen, sodium dihydrogen phosphate, sodium citrate (trisodium citrate), disodium edetate, potassium aluminum sulfate, and the like. Moreover, benzalkonium chloride and chlorohydroxy aluminum are also mentioned.

The content ratio of the component (C) in the cosmetic of the present invention is 0.05 to 1.4% by mass, preferably 0.1 to 1.0% by mass, and more preferably, based on 100% by mass of the total amount of the cosmetic of the present invention excluding component (F). It is 0.2 to 0.8 mass%. When the content ratio is 0.05% by mass or more, the time until each layer is separated after emulsification of the cosmetic composition can be shortened. In addition, it is possible to promote creaming, so that the balance between the combination rate of the emulsion and the creaming rate becomes appropriate, and the coalescence occurs after proper creaming, so that the adhesion of the oily component generated by the coalescence to the container wall is suppressed. It can be used, and the aesthetics when returning to the multi-layered type are excellent. When the content ratio is 1.4% by mass or less, since the creaming rate is appropriately slowed down, the time until each layer is separated is not too short, and the usability of the cosmetic is improved. The content ratio of the component (C) is the sum of the content ratios of all components (C) in the cosmetic composition of the present invention.

[Ingredient (D)]

Component (D) is an ionic surfactant. As component (D), anionic surfactant, cationic surfactant, and amphoteric surfactant are mentioned. The component (D) can promote the union of the emulsion. In the cosmetic composition of the present invention, the component (D) is estimated to be oriented at an oil-water interface to weaken the film strength of the interface, and thus the rate of integration of the emulsion can be improved. As for the component (D), only 1 type may be used and 2 or more types may be used.

As anionic surfactants, for example, higher fatty acid soaps, alkyl sulfuric acid ester salts, alkyl phosphates, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl phenyl ether sulfates, alkyl ether phosphate esters, alkyl ether carboxylic acid salts, acyl Methyl taurine salt, N-acyl-N-methyl-β-alanine salt, N-acyl glycine salt, N-acyl glutamate, polyoxyethylene alkyl carboxylic acid salt, alkyl phenyl ether sulfonic acid salt, alkyl sulfosuccinic acid and salts thereof, N-acyl sarcosine and its salt, polyoxyethylene palm oil fatty acid monoethanol amidosulfate, etc. are mentioned.

Cationic surfactants include, for example, amino acid-based cationic surfactants, alkyl amine salts, fatty acid amidoamine salts, amine salts such as ester-containing tertiary amine salts, monoalkyl-type quaternary ammonium salts, and dialkyl Quaternary ammonium salts such as alkyl quaternary ammonium salts, trialkyl quaternary ammonium salts, benzalkonium quaternary ammonium salts, cyclic quaternary ammonium salts such as alkylpyridinium salts, benzethonium chloride, etc. . Among them, cationic surfactants having a relatively bulky structure are preferable, and for example, benzalkonium chloride, N-palm oil fatty acid acyl-L-arginine ethyl·DL-pyrrolidone carboxylate, and the like are preferable.

Examples of amphoteric surfactants include glycine-type amphoteric surfactants such as alkyl glycine salt, carboxymethyl glycine salt, N-acyl aminoethyl-N-2-hydroxyethyl glycine salt, alkylamino propionate, alkylimino dipropionate, etc. Aminopropionic acid type amphoteric surfactant of, alkyl dimethyl aminoacetic acid betaine, aminoacetic acid betaine type amphoteric surfactant such as fatty acid amidopropyl dimethyl aminoacetic acid betaine, sulfobetaine type amphoteric surfactant such as alkyl hydroxy sulfobetaine And activators.

As the component (D), benzalkonium chloride and/or N-palm oil fatty acid acyl-L-arginine ethyl·DL-pyrrolidone carboxylic acid salt is preferable, and particularly preferably N-palm oil fatty acid acyl-L-arginine ethyl· It is DL-pyrrolidone carboxylate.

The content ratio of the component (D) in the cosmetic of the present invention is not particularly limited, but is preferably 0.005 to 0.1% by mass, more preferably, based on 100% by mass of the total amount of the cosmetic of the present invention excluding the component (F). 0.008 to 0.05 mass%, more preferably 0.01 to 0.05 mass%. When the content ratio is 0.005% by mass or more, the unity of the emulsion can be further promoted, and the time until each layer is separated after the cosmetic is emulsified by stirring can be shortened. If the content ratio is 0.1% by mass or less, it is possible to prevent the emulsion from becoming too fast to be combined, and to maintain the emulsion state for some time after emulsifying the cosmetic by stirring. For this reason, the usability of a cosmetic is improved. And, by being within the above range, it is possible to optimize the rate of coalescence of the emulsion from the emulsion state of the cosmetic. The content ratio of the component (D) is the sum of the content ratios of all components (D) in the cosmetic composition of the present invention.

[Component (E)]

Component (E) is water and is not particularly limited, but purified water is preferable. Component (E) is a component that becomes a medium of two water layers in the cosmetic composition of the present invention. The content ratio of the component (E) in the cosmetic of the present invention is preferably 60.0 to 95.0 mass%, more preferably 70.0 to 90.0 mass% with respect to 100 mass% of the total amount of the cosmetic of the present invention excluding component (F). %to be.

[Component (F)]

Component (F) is an oily component. As the component (F), vegetable oil, ester oil, silicone oil, hydrocarbon oil, lead, higher alcohol, etc. are mentioned, for example. Component (F) forms an oil layer in the cosmetic of the present invention. As for the component (F), only 1 type may be used and 2 or more types may be used.

The plant oils include, for example, macadamia nut oil, eucalyptus oil, palm oil, avocado oil, safflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, shea oil (shea butter), cacao butter, almond oil, sunflower oil, Rose hip oil, olive squalane, kiwi fruit seed oil, apricot seed oil, sesame oil, soybean oil, jojoba oil, castor oil, hazelnut oil, meadow foam oil, mentha oil, argan oil, carat oil, lavender oil, sugar squalane, damask rose flower lead (Rosa Damascena Flower Wax), Rosa Centifolia Flower Wax, Jasmine Flower Wax, Camellia Oil, and their hydrogenated substances (e.g., hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated Avocado oil, hydrogenated soybean oil, etc.), and the like.

Examples of the ester oil include ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, 2-ethylhexyl palmitate, octyldodecyl myristate, isopropyl isostearate, iso Propylene glycol stearate, Cetyl 2-ethylhexanoate, glyceryl tri2-ethylhexanoate, glyceryl tri(caprylic/capric acid), isononyl isononate, diisopropyl adipic acid, pentaeryth tetraoctanoate Lytyl, tetraisostearic acid pentaerythrit, malic diisostearyl, triethylhexanoic acid erythrityl, hydroxystearic acid 2-ethylhexyl, hexa (hydroxystearic acid/stearic acid/rosinic acid) dipentaerythrityl, tetra (hydroxy Stearic acid/isostearic acid) dipentaerythrityl, hexahydroxystearic acid dipentaerythrityl, (ethylhexanoic acid/stearic acid/adipic acid) glyceryl, tri(caprylic acid/capric acid/myristoic acid/stearic acid) glyceryl , Hexa(behenic acid/benzoic acid/ethylhexanoic acid) dipentaerythrityl, and alkyl benzoate (C12-15).

Although it does not specifically limit as said silicone oil, For example, dimethyl silicone oil, such as methylpolysiloxane and a high polymerization methylpolysiloxane; Methylphenyl silicone oils such as methylphenylpolysiloxane; Cyclic silicone oils such as methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane; Amino-modified silicones such as aminopropylmethylsiloxane-dimethylsiloxane copolymer, aminoethyl aminopropylsiloxane-dimethylsiloxane copolymer, aminoethyl aminopropylmethylsiloxane-dimethylsiloxane copolymer, carboxy-modified silicone, fatty acid-modified silicone, alcohol-modified silicone, Modified silicones such as aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone, and alkyl-modified silicone; Methylhydrogenpolysiloxane, dimethiconol, and the like.

As the hydrocarbon oil, for example, α-olefin oligomer, petrolatum, isoparaffin, light isoparaffin, light liquid isoparaffin, squalane, synthetic squalane, vegetable squalene, liquid isoparaffin, liquid paraffin, hydrogenated polyisobutene, Hydrogenation (tetradecenyl/methylpentadecene), isododecane, and the like.

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

Examples of the higher alcohol include cetyl alcohol, stearyl alcohol, isostearyl alcohol, myristyl alcohol, 2-octyldodecanol, and oleyl alcohol.

The content ratio of the component (F) in the cosmetic composition of the present invention is not particularly limited, but is preferably 5.0% by mass or more, and more preferably 7.0% by mass or more with respect to 100% by mass of the total amount of the cosmetic composition of the present invention. When the content ratio is 5.0 mass% or more, the formation of an oil layer can be sufficiently confirmed visually. The content ratio is preferably 60.0% by mass or less, and more preferably 50.0% by mass or less. When the content ratio is 60.0% by mass or less, it is possible to suppress the feeling of oil film and stickiness derived from the oily component, and the feeling of use as a cosmetic is excellent. The content ratio of the component (F) is the sum of the content ratios of all components (F) in the cosmetic composition of the present invention.

[Ingredient (G)]

Component (G) is one or more polyhydric alcohols selected from the group consisting of polyoxyalkylene alkylglucoside, propylene glycol, dipropylene glycol, and polyethylene glycol having a number average molecular weight of 2000 or less. When the component (G) is included, in the cosmetic composition of the present invention, the separation speed of the two water layers is improved. As for component (G), only 1 type may be used and 2 or more types may be used.

The number average molecular weight of polyethylene glycol that can be used as the component (G) is 2000 or less, preferably 200 to 1800, more preferably 400 to 1600.

As the polyoxyalkylene alkylglucoside, for example, polyoxyalkylene (eg, ethylene oxide, propylene oxide, etc.) may be added to the alkylglucoside. The average number of added moles of the polyoxyalkylene is preferably about 1 to 20 moles. As the alkyl group in the polyoxyalkylene alkylglucoside, an alkyl group having 1 to 4 carbon atoms is preferable, and examples thereof include a methyl group, an ethyl group, a propyl group, and an isopropyl group. Especially as said polyoxyalkylene alkylglucoside, polyoxyalkylene methylglucoside is preferable.

As the polyoxyalkylene methylglucoside, polyoxyethylene methylglucoside and polyoxypropylene methylglucoside are preferable, and specifically, polyoxyethylene (10) methylglucoside, polyoxyethylene (20) methylglucoside Seed, polyoxypropylene (10) methyl glucoside, polyoxypropylene (20) methyl glucoside, and the like.

The content ratio of the component (G) in the cosmetic composition of the present invention is preferably 1.0 to 30.0% by mass, more preferably 2.0 to 20.0% by mass, based on 100% by mass of the total amount of the cosmetic composition of the present invention excluding the component (F). , More preferably 4.0 to 15.0 mass%. When the said content ratio is 1.0 mass% or more, the separation speed of the water layer of two layers can be improved more. When the said content ratio is 30.0 mass% or less, stickiness can be suppressed. The content ratio of the component (G) is the sum of the content ratios of all components (G) in the cosmetic composition of the present invention.

It is preferable that the cosmetic of the present invention does not contain a nonionic surfactant substantially. In addition, the term "substantially not contained" means that it is not actively blended and, for example, excludes the case where it is inevitable. Specifically, the content ratio of the nonionic surfactant in the cosmetic of the present invention is preferably 0.05% by mass or less, and more preferably 0.01% by mass, based on 100% by mass of the total amount of the cosmetic of the present invention excluding component (F). % Or less, more preferably 0.005 mass% or less. This is because the nonionic surfactant exhibits an action of inhibiting the cohesion and creaming of the emulsion when it is returned from the cosmetic in the emulsion state in a multilayered manner. The content ratio of the nonionic surfactant is the sum of the content ratios of all nonionic surfactants in the cosmetic composition of the present invention.

Examples of the nonionic surfactant include sorbitan fatty acid esters, glycerin fatty acid esters, and alkylene oxide adducts thereof, polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, and polyoxyalkylene alkylphenols. , Polyoxyethylene sorbit fatty acid ester, polyoxyethylene alkylphenyl formaldehyde condensate, polyoxyethylene sterol and its derivatives, polyoxyethylene lanolin and its derivatives, polyoxyethylene beeswax derivatives, sugar esters, polyoxyethylene hydrogenated castor Free, polyoxyethylene castor oil, etc. are mentioned.

[Other ingredients]

The cosmetic of the present invention may contain components (other components) other than the above components (A) to (G) within a range that does not impair the object of the present invention. The other components are not particularly limited, and examples thereof include components commonly used in cosmetics and quasi-drugs. Specifically, for example, thickeners such as carboxyvinyl polymer, acrylic acid-alkyl methacrylate copolymer, hydroxymethyl cellulose, hydroxypropylmethyl cellulose, and xanthan gum; Moisturizer; disinfectant; Pearlizing agent; Anti-inflammatory agents such as glycyrrhizic acid and salts thereof; Refreshing agents such as menthol; Spices; Ultraviolet absorbers; Antioxidants; Film-forming polymer compounds; Powder; Pigment; Pigment; Vitamins; Amino acids; Astringent; Whitening agents; Animal and plant extracts; mountain; Alkali, etc. are mentioned.

The use of the cosmetic of the present invention is not particularly limited, and for skin (skin) (e.g., face, neck, scalp, shoulder, body, arm, elbow, palm, back of hand, thigh, calf, knee, ankle, foot, etc.) , Soles, etc.), can be used for either hair. Since the cosmetic of the present invention can be used as a cleansing cosmetic by including the component (F), it is preferably a cosmetic for skin. Moreover, since the cosmetic composition of the present invention can be used also as a hair oil by including the component (F), it may be a cosmetic composition for hair.

The cosmetic composition of the present invention is not particularly limited, and can be produced by a known or commonly used method. For example, it can be prepared by mixing each of the above components and stirring with a homo mixer, a paddle mixer, or the like.

In the cosmetic composition of the present invention, in a cosmetic composition using water [component (E)] as a medium, dextran [component (A)] having a number average molecular weight of 50,000 to 300,000 and polyethylene glycol having a number average molecular weight of 40 to 30,000 [ By including the component (B)] in a specific ratio, while maintaining the excellent feeling of use of the cosmetic, the volume-exclusion effect of the components (A) and (B) is improved, and the aqueous layer containing the component (A) and the component It is possible to form a two-layer water-layer containing (B). And it is possible to form an oil layer by blending the oily component [component (F)] to obtain a multilayer cosmetic having two water layers and an oil layer. In addition, it is important from the viewpoint of aesthetics that the cosmetic of the present invention is agitated to make an emulsion when using the cosmetic, and after use, the oil layer and the two water layers are separated to form a multilayer shape again. For this reason, by blending the electrolyte [component (C)] in a specific ratio, the creaming of the emulsion is promoted, and further blending of the ionic surfactant [component (D)] promotes the cohesion of the emulsion. Balance ming speed and unity speed. Thereby, when returning to the multi-layer type, it is easier to preferentially cause creaming rather than unity, and adhesion of the unified oily component to the container wall can be suppressed, and even at this time, it is possible to have excellent aesthetics.

Example

Hereinafter, the present invention will be described in more detail based on Examples, but the present invention is not limited to these Examples. In addition, the blending amount described in the table is the blending amount of each component (that is, the blending amount of the active ingredient in each raw material, so-called pure powder), and is expressed as "mass%" unless otherwise specified.

Examples 1 to 22, Comparative Examples 1 to 9

Using each component recorded in the table, each cosmetic composition of Examples and Comparative Examples was prepared by a commercial method.

The main components listed in the table are as follows.

<Component (A)>

Dextran 70: Brand name "Dextran 70", manufactured by Meito Sangyo Co., Ltd., number average molecular weight 54000 to 85000

Polymer dextran EH: brand name "polymer dextran EH", manufactured by Meito Sangyo Co., Ltd., number average molecular weight 178000 to 217000

<Component (B)>

PEG4000: Brand name "PEG #4000", manufactured by Nichiyu Corporation, number average molecular weight 4000

PEG6000: Brand name "PEG #6000", manufactured by Nichiyu Corporation, number average molecular weight 6000

PEG10000: Brand name "Brownone PEG-10000", manufactured by Yushi Aoki Co., Ltd., number average molecular weight 10000

PEG20000: Brand name "Brownone PEG-20000S", manufactured by Aoki Yushi Kogyo Co., Ltd., number average molecular weight 20000

<Component (C)>

Sodium chloride: Brand name "Nakuru M", manufactured by Naikai Engyo Co., Ltd.

<Component (D)>

N-palm oil fatty acid acyl-L-arginine ethyl·DL-pyrrolidone carboxylic acid salt: Brand name "CAE", manufactured by Ajinomoto Co., Ltd.

<ingredient (F)>

Dimethicone: Trade name ``XIAMETER PMX-200 SILICONE FLUID 1.5CS'', manufactured by Toray Dow Corning Co., Ltd., methylpolysiloxane

Hard isoparaffin: brand name ``Marcasol R'', manufactured by Maruzen Sekiyu Chemical Co., Ltd.

Sunflower oil: Brand name "High-oleic sunflower oil", manufactured by OLEOMONTERREAL S.L., sunflower seed oil

Liquid paraffin: brand name "CARNATION", manufactured by Sonneborn Inc.

Liquid isoparaffin: Brand name ``Pallim EX'', manufactured by Nichiyu Corporation

<Component (G)>

Polyoxypropylene methylglucoside: Brand name "Macbiobride MG-10P", manufactured by Nichiyu Corporation

<Other ingredients>

Dextran 40: Brand name "Dextran 40", manufactured by Meito Sangyo Co., Ltd., number average molecular weight 31000 to 45000

(evaluation)

Each cosmetic obtained in Examples and Comparative Examples was evaluated as follows. The evaluation results are shown in the table.

(1) separation speed

100 ml of each cosmetic obtained in Examples and Comparative Examples was filled in a bottle container made of polyethylene terephthalate (capacity 150 ml), and after sufficiently shaking, the separation behavior of the layer from immediately after to 10 minutes was observed visually. , The speed of layer separation was determined by the following criteria.

[Criteria for judging separation speed]

○ (Good): The speed of dividing into three layers: oil layer, water layer, and water layer is suitable for practical use.

× (poor): The speed of dividing into three layers is too fast, and separation occurs before applying the cosmetic. Alternatively, the speed of dividing into three floors is slow, resulting in poor aesthetics.

(2) appearance

After the evaluation of (1), 3 hours later, it was visually observed, and the appearance was determined by the following criteria.

[Appearance criteria]

○(Good): It is divided into three layers: oil layer, water layer, and water layer. In addition, no obvious stains due to the adhesion of oil stains to the wall surface are seen.

× (poor): It is not divided into three floors. And/or, the oil remains are clearly attached to the wall surface, and the stain is seen.

(3) Feeling (sticky)

Each cosmetic obtained in Examples and Comparative Examples was applied to the inner upper arm after sufficiently shaking, and the stickiness immediately after application was determined by the following criteria.

[Criteria for judging the feeling of use (stickiness)]

○(Good): There is little or no stickiness, so it is a feeling of use without problems in practical use.

X (poor): A clear stickiness is felt, which is unpleasant in practical use.

[Table 1]

[Table 2]

The cosmetic composition (example) of the present invention has a suitable separation speed for practical use, and after separation, it can be confirmed that it is divided into three layers: an oil layer, a water layer, and a water layer, and obvious contamination due to adhesion of oil droplets to the wall surface. It was not visible and the aesthetics were excellent. Also, the feeling of use was excellent. On the other hand, when dextran having a number average molecular weight of less than 50,000 is used instead of component (A) (Comparative Example 1), when polyethylene glycol having a number average molecular weight of less than 4000 is used instead of component (B) (Comparative Example 2), component In both the case where the content ratio of (A) is low (Comparative Example 3), the case where the content rate of component (B) is low (Comparative Example 5), and the case where the component (D) is not blended (Comparative Example 9) , The speed of dividing into three layers was slow, and even after 3 hours, it could not be confirmed that the three layers were divided into oil layer, water layer, and water layer with the naked eye.

In either of the cases where the content ratio of the component (A) is high (Comparative Example 4) and the case where the content ratio of the component (B) is high (Comparative Example 6), it was evaluated that stickiness was clearly felt and the feeling of use was inferior. .

When the component (C) was not blended (Comparative Example 7), it was visually confirmed that it was divided into three layers: an oil layer, a water layer, and a water layer after 3 hours, but the separation speed was slow, and oil droplets clearly adhere to the wall surface. Had been. In addition, when the content ratio of the component (C) is high (Comparative Example 8), the separation speed is too fast, and there is a fear that separation may occur before applying the cosmetic.

X: Cosmetic of the present invention 1: Oil layer
2: water layer 3: water layer
4: Courage

Claims (3)

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) are contained, and the total amount of the cosmetic composition excluding the component (F) For a cosmetic, wherein the content ratio of the component (A) is 2.0 to 10.0 mass%, the content ratio of the component (B) is 2.0 to 10.0 mass%, and the content ratio of the component (C) is 0.05 to 1.4 mass%:
Component (A): Dextran having a number average molecular weight of 50,000 to 300,000
Component (B): Polyethylene glycol having a number average molecular weight of 4000 to 30,000
Component (C): electrolyte
Component (D): ionic surfactant
Ingredient (E): water
Component (F): oily component. The method of claim 1,
Cosmetics further containing the following component (G):
Component (G): at least one polyhydric alcohol selected from the group consisting of polyoxyalkylene alkylglucoside, propylene glycol, dipropylene glycol, and polyethylene glycol having a number average molecular weight of 2000 or less. The method according to claim 1 or 2,
Cosmetics that are substantially free of nonionic surfactants.

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