JP6747763B2 - Emulsified cosmetics - Google Patents

Description

The present invention relates to emulsified cosmetics.

A cosmetic that gives the skin a firmness and a cosmetic that can give the user a high-concentration feel (hereinafter referred to as "rich feeling") when applied feel a certain comfort to the user. At the same time, it can be said to be one of the types of cosmetics required by users because it can produce a high-class feeling. Conventionally, as an emulsified cosmetic that imparts a firmness to the skin, one containing polyethylene glycol (PEG) or higher alcohol is known (Patent Documents 1 and 2).

JP 2012-197253 A JP, 2005-53879, A

However, when PEG is used, it easily flows off from the skin and the firmness is not sufficiently imparted, and when higher alcohols are used, the agent thickens over time, and the storage stability of the preparation is not good. Do you get it.

An object of the present invention is to provide an emulsified cosmetic composition that is excellent in storage stability while imparting a firmness and a rich texture.

That is, the present invention is
Contains the following component A, the following component B, the following component C, the following component D, and the following component E,
The content of the component A is 0.2 to 3.5% by mass, the content of the component B is 0.2 to 2.0% by mass, and the content of the component D is 0.3% by mass. The mass ratio (C/A) of the component C to the component A is 0.03 to 0.35, and the mass ratio (D/A) of the component D to the component A is 0.045 or more. Is an emulsified cosmetic.
Component A: Starch aluminum octenyl succinate Component B: Glyceryl monobehenate Component C: Xanthan gum Component D: Carboxyvinyl polymer and/or alkyl-modified carboxyvinyl polymer Component E: Water

ADVANTAGE OF THE INVENTION According to this invention, the emulsified cosmetics which are excellent in storage stability can be provided, giving the firmness and the richness. The above-mentioned "feeling of firmness" means a feeling that the skin is stretched. In addition, the above-mentioned "feeling of richness" means a feeling that a high concentration agent is applied at the time of application.

The emulsion cosmetic of the present invention is an emulsion cosmetic containing components A to E.

The present inventors have found that by using the component A starch aluminum octenyl succinate in a hydrated state, it is possible to produce an emulsified cosmetic that imparts a firmness. However, it has been found that when the emulsified cosmetic containing the component A is stored at a low temperature (5° C. or less), the elasticity of the emulsified cosmetic becomes high and the emulsion becomes jelly, and the stability is lowered. This phenomenon is presumed to be caused by the aging of starch. Then, the present inventors emulsify glyceryl monobehenate as component B, xanthan gum as component C, and carboxyvinyl polymer (or alkyl-modified carboxyvinyl polymer) as component D from a wide variety of components that can be used in the cosmetics field. It has been found that when applied to cosmetics, the low-temperature stability of emulsified cosmetics can be improved and a rich feeling can be imparted to the skin. The mechanism for improving storage stability is not clear, but application of such components causes formation of gel network (intercalation), which suppresses hydrogen bonding between starch molecules, resulting in structural change at low temperature. It is presumed that this was due to the suppression of

Component A is "aluminum starch octenyl succinate". The component A exerts an effect of giving a firm feeling to the skin to which the emulsified cosmetic is applied. The mechanism by which the firmness can be obtained is not clear, but it is presumed that it is caused by the evaporation of water after the application of the emulsified cosmetic and the formation of a film of the component A on the skin.

In the emulsion cosmetic of the present invention, the component A exists in a hydrated state. Examples of the method of bringing the component A into a hydrated state include a method of heating starch aluminum octenylsuccinate with water. When heated together with water, the structural change of the component A occurs, and the hydrophobic powder becomes hydrophilic and becomes a hydrated state. The heating temperature is preferably 60° C. or higher, more preferably 65 to 90° C., and further preferably 70 to 85° C.

Starch aluminum octenyl succinate is a starch derivative obtained by esterifying starch with octenyl succinic acid and adding an aluminum salt. Examples of the starch that constitutes the aluminum starch octenyl succinate include corn starch. Component A includes corn starch aluminum octenyl succinate. As the component A, a commercially available product can be used. Examples of commercially available products of Component A include “DRY-FLO PURE” (manufactured by AKZONOBEL), “DRY-FLO PC” (manufactured by NATO NAL STARCH AND CHEMICAL), and “Octier” (manufactured by Nitto Chemical Co., Ltd.).

The content of the component A in 100% by mass of the emulsified cosmetic of the present invention is 0.2% by mass or more, preferably 0.3% by mass or more, and more preferably from the viewpoint of imparting a firmness to the skin. 0.5% by mass or more, 3.5% by mass or less, preferably 3.0% by mass or less, and more preferably 2.5% by mass from the viewpoint of suppressing the generation of coating residue when applied to the skin. It is the following. The content of the component A is the total amount of all the components A contained in the emulsion cosmetic of the present invention.

Ingredient B is "glyceryl monobehenate". The component B exerts an effect of imparting a feeling of richness at the time of application of the emulsified cosmetic, and further imparting high temperature stability to the emulsified cosmetic.

The content of the component B in 100% by mass of the emulsified cosmetic of the present invention is 0.2% by mass or more, preferably 0.5% by mass or more, and more preferably from the viewpoint of imparting a rich feeling and stability at high temperature. From 0.8 mass% or more, on the other hand, from the viewpoint of high temperature stability, it is 2.0 mass% or less, preferably 1.8 mass% or less, and more preferably 1.5 mass% or less.

Component C is "xanthan gum". When the component C is used in combination with the component D, it exhibits the effect of imparting low temperature stability to the emulsified cosmetic composition. Xanthan gum is a chain polysaccharide composed of repeating units of 2 molecules of glucose and 2 molecules of mannose glucuronic acid.

As the component C, a commercially available product can be used. Examples of commercially available products of Component C include "Echo Gum T" (manufactured by DSP Gokyo Food & Chemical Co., Ltd.), "NOMCOAT ZZ" (manufactured by Nisshin Oillio Group).

The content of the component C in 100% by mass of the emulsified cosmetic of the present invention is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, further preferably 0.03% by mass from the viewpoint of low temperature stability. % Or more, preferably 0.5% by mass or less, more preferably 0.3% by mass or less, and further preferably 0.2% by mass, from the viewpoint of suppressing stickiness and generation of coating residue when applied to the skin. It is the following.

The mass ratio (C/A) of the component C to the component A in the emulsified cosmetic of the present invention is 0.03 from the viewpoint that the low temperature stability is lowered and the emulsified cosmetic is not highly jelly-like elastic. Or more, preferably 0.035 or more, more preferably 0.04 or more, and the emulsified cosmetic material becomes in a non-uniform state (a sloppy state: a state in which highly elastic parts are mixed), and the application feel is deteriorated. From the viewpoint of preventing this, it is 0.35 or less, preferably 0.3 or less.

Component D is "carboxyvinyl polymer and/or alkyl modified carboxyvinyl polymer". That is, component D is one or both of a carboxyvinyl polymer and an alkyl-modified carboxyvinyl polymer. Component D, when used in combination with Component C, exhibits the effect of imparting low temperature stability to the emulsified cosmetic composition.

The carboxyvinyl polymer is mainly a polymer of acrylic acid, and the alkyl-modified carboxyvinyl polymer is mainly a copolymer of acrylic acid and alkyl methacrylate. As the component D, only one kind may be used, or two or more kinds may be used.

The carboxyvinyl polymer and the alkyl-modified carboxyvinyl polymer can be easily obtained as commercial products. Preferable commercial products of carboxyvinyl polymer include, for example, "Carbopol 934", "Carbopol 940", "Carbopol 941", "Carbopol 980", "Carbopol 981", "Carbopol 1342", "Carbopol 1342". "Paul 2984", "Carbopol Ultrez 10", "Carbopol ETD 2050" (Nippon Lubrizol Co., Ltd.); "AQPEC HV-501", "AQPEC HV-504", "AQPEC HV-505", "Hivis" Wako 104", "Hibisu Wako 105" (both are Wako Pure Chemical Industries, Ltd.) and the like. Preferable commercial products of the alkyl-modified carboxyvinyl polymer include, for example, "PEMULEN TR-1", "PEMULEN TR-2", "Carbopol ETD 2020", "Carbopol ULTREZ 20" (both Nippon Lubrizol Co., Ltd.). Etc.

The content of the component D in 100% by mass of the emulsified cosmetic of the present invention is preferably 0.05% by mass or more, more preferably 0.06% by mass or more, further preferably 0.08% by mass from the viewpoint of low temperature stability. % Or more, on the other hand, 0.3% by mass or less from the viewpoint that the emulsified cosmetic material is in a non-uniform state (a sloppy state: a state in which highly elastic parts are mixed) and the application feel is suppressed from decreasing. And is preferably 0.25 mass% or less. The content of the component D is the total amount of all the components D contained in the emulsion cosmetic of the present invention.

The mass ratio (D/A) of the component D to the component A in the emulsified cosmetic of the present invention is 0.045 or more, preferably 0.05 or more, and more preferably 0.08 from the viewpoint of low temperature stability. It is above, and 0.5 or less is preferable from the viewpoint of application feeling.

Ingredient E is "water". The component E has a role as a medium of the emulsified cosmetic composition for forming an emulsified system. When the cosmetic is emulsified, the component A can be in a hydrated state, and the effect of imparting a firmness to the skin by the component A is exhibited.

The content of the component E in 100% by mass of the emulsified cosmetic of the present invention is preferably 40.0% by mass or more, more preferably 50.0% by mass or more, further preferably 60.0% by mass or more, and the like. From the viewpoint of including the component of 95.0% by mass or less, more preferably 90.0% by mass or less.

The emulsified cosmetic composition of the present invention may further contain "phospholipid" as the component F. By using the component F, not only the emulsification is promoted, but also the user can be provided with a rich feeling and a soft touch to the skin. Therefore, the emulsified cosmetic composition of the present invention may further contain the component F. preferable.

The component F is a complex lipid containing a phosphoric acid residue, and examples thereof include natural phospholipids, synthetic phospholipids, and hydrogenated phospholipids obtained by saturating the unsaturated carbon chains of naturally occurring phospholipids with hydrogen. Examples of the phospholipids include phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylinositol, lysophosphatidylcholine, sphingomyelin, egg yolk lecithin, soybean lecithin, and other natural phospholipids; dilauroylphosphatidylcholine, dimyristoylphosphatidylcholine, dipalmitoylphosphatidylcholine, and dipalmitoylphosphatidylcholine. Examples thereof include synthetic phospholipids such as stearoylphosphatidylcholine, dioleoylphosphatidylcholine, and palmitoyl/oleoylphosphatidylcholine; hydrogenated phospholipids such as hydrogenated soybean lecithin, hydrogenated egg yolk lecithin, hydrogenated phosphatidylcholine, and hydrogenated phosphatidylserine. Of these, hydrogenated phospholipids are preferable, and hydrogenated soybean lecithin is more preferable, from the viewpoint of excellent storage stability. As the component F, only one type may be used, or two or more types may be used.

As the component F, a commercially available product can be used. Examples of commercially available hydrogenated soybean lecithin include, for example, "COATSOME NC-61" (manufactured by NOF CORPORATION), "NIKKOL Recinol S-10" (manufactured by Nikko Chemicals Co., Ltd.), and "Basis LP-20H" (Nisshin Oilio Group). Manufactured by the company) and the like.

The content of the component F in 100% by mass of the emulsified cosmetic of the present invention is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and further preferably 0.5% by mass, from the viewpoint of improving the coating feel. % Or more, preferably 5.0% by mass or less, more preferably 3.5% by mass or less, and further preferably 2.5% by mass or less, from the viewpoint of suppressing discoloration and odor generation over time. The content of the component F is the total amount of all the components F contained in the emulsion cosmetic of the present invention.

The emulsified cosmetic composition of the present invention can further contain "glyceryl monostearate and/or sorbitan monostearate" as component G. That is, the component G is one or both of glyceryl monostearate and sorbitan monostearate. It is preferable to use the component G because the embossed cosmetic can improve the richness. Further, the combined use of the component G and the component F is preferable because the emulsification by the component F can be further stabilized.

The content of the component G in 100% by mass of the emulsified cosmetic of the present invention is preferably 0.1% by mass or more, and more preferably 0.2% by mass or more, from the viewpoint of improving the richness and improving the emulsion stability. From the viewpoint of improving the usability, it is preferably 3.0% by mass or less, more preferably 2.5% by mass or less, and further preferably 2.0% by mass or less. The content of the component G is the total amount of all the components G contained in the emulsion cosmetic of the present invention.

The emulsified cosmetic of the present invention contains an oil agent in addition to the above components A to G in order to make the dosage form an emulsified system. The oil agent is not particularly limited, and examples thereof include higher alcohols, higher fatty acids, fats and oils, hydrocarbon oils, ester oils, silicone oils, waxes and the like.

Specific examples of the above oil agents include higher alcohols such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, lanolin alcohol, behenyl alcohol, and cetostearyl alcohol; lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid. Higher fatty acids such as behenic acid, undecylenic acid, lanolinic acid, isostearic acid; coconut oil, palm oil, hydrogenated palm oil, avocado oil, sesame oil, olive oil, kukui nut oil , safflower oil, almond oil, corn oil, cottonseed oil, Oils and fats such as sunflower seed oil, grape seed oil, hazelnut oil, macadamia nut oil, meadow foam oil and rosehip oil; hydrocarbon oils such as olefin oligomers, light liquid isoparaffin, squalane, liquid paraffin, liquid isoparaffin and petrolatum; ethyl oleate , Isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, oleyl oleate, octyldodecyl myristate, octyldodecyl oleate, ethyl isostearate, isopropyl isostearate, cetyl 2-ethylhexanoate, 2-ethylhexane Acid cetostearyl, glyceryl tri-2-ethylhexanoate, glyceryl tri(caprylic/capric acid), glyceryl triisopalmitate, pentaerythritol tetra-2-ethylhexanoate, isocetyl octanoate, isostearyl octanoate, isocetyl isostearate, isostearate Ester oils such as octyldodecyl acid, octyldodecyl dimethyloctanoate, propylene glycol isostearate; dimethicone, methylpolysiloxane, highly polymerized methylpolysiloxane, methylphenylpolysiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, octamethylcyclotetra Silicone oils such as siloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, alcohol-modified silicone, alkyl-modified silicone, amino-modified silicone, epoxy-modified silicone; and waxes such as jojoba oil and beeswax. .. As the oil agent, only one kind may be used, or two or more kinds may be used.

The content of the oil agent in 100% by mass of the emulsion cosmetic of the present invention is not particularly limited, but from the viewpoint of imparting an emollient effect, 2.0% by mass or more is preferable, and 3.0% by mass or more is more preferable. On the other hand, from the viewpoint of suppressing stickiness, the content is preferably 30.0 mass% or less, more preferably 20.0 mass% or less. The content of the oil agent is the total amount of all the oil agents contained in the emulsion cosmetic of the present invention.

The mass ratio (oil/B) of the oil agent to the component B in the emulsified cosmetic composition is preferably 3.0 or more, more preferably 3.25 or more, and 30.0 or less from the viewpoint of imparting a rich feeling. It is more preferably 20.0 or less.

The emulsion cosmetic of the present invention may contain an emulsifier other than the component F (abbreviated as “other emulsifier”). The other emulsifier is not particularly limited, but a nonionic emulsifier is preferable. As the "other emulsifier", only one kind may be used, or two or more kinds may be used.

As the "other emulsifier", sorbitan fatty acid ester, glycerin fatty acid ester, castor oil, hydrogenated castor oil, and alkylene oxide adducts thereof, polyoxyethylene sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyalkylene alkyl ether, poly Oxyalkylene fatty acid ester, polyoxyalkylene alkylphenol, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene alkylphenyl formaldehyde condensate, polyoxyethylene sterol and its derivative, polyoxyethylene lanolin and its derivative, polyoxyethylene beeswax derivative, sugar ester Nonionic emulsifiers such as higher fatty acid soaps, alkyl sulfate ester salts, alkyl phosphates, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkylphenyl ether sulfates, alkyl ether phosphates, alkyl ether carboxylates, Acyl methyl taurine salt, N-acyl-N-methyl-β-alanine salt, N-acyl glycine salt, N-acyl glutamate, polyoxyethylene alkyl carboxylate, alkyl phenyl ether sulfonate, alkyl sulfosuccinic acid and the like. Salts, N-acyl sarcosine and its salts, anionic emulsifiers such as polyoxyethylene coconut oil fatty acid monoethanolamide sulfate; alkylamine salts, fatty acid amideamine salts, amine salts such as ester-containing tertiary amine salts, monoalkyl type 4 Alkyl quaternary ammonium salts such as quaternary ammonium salts, dialkyl type quaternary ammonium salts, trialkyl type quaternary ammonium salts, benzalkonium type quaternary ammonium salts, cyclic quaternary ammonium salts such as alkylpyridinium salts, benzethonium chloride, etc. And cationic emulsifiers. Among them, nonionic emulsifiers are preferable, and polyoxyethylene hydrogenated castor oil, polyoxyethylene glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyglycerin fatty acid ester are preferable.

The content of the "other emulsifier" in 100% by mass of the emulsified cosmetic of the present invention is preferably 0.05% by mass or more, more preferably 0.1% by mass or more and 5.0% by mass or less, and further preferably Is 3.0% by mass or less. The nonionic emulsifier preferably satisfies the above range. The content of "other emulsifiers" is the total amount of all "other emulsifiers" contained in the emulsified cosmetic composition of the present invention.

The emulsion cosmetic of the present invention may further contain optional components other than the above. The optional components are not particularly limited, but include, for example, lower alcohols; polyhydric alcohols such as glycerin and 1,3-butylene glycol; ultraviolet absorbers; powders; antioxidants; preservatives such as methylparaben; perfumes; coloring. Agents; Chelating agents; Cooling agents; Thickening agents; Vitamins; Neutralizing agents; Amino acids; pH adjusting agents; Whitening agents; Anti-inflammatory agents; Deodorants; Animal and plant extracts; Sequestering agents such as sodium salts of ethylenediaminetetraacetic acid Examples include additives such as agents. The other components may be used alone or in combination of two or more.

The emulsified cosmetic composition of the present invention preferably contains substantially no "monohydric linear aliphatic alcohol having 12 to 22 carbon atoms". When the above aliphatic alcohol is contained, the emulsified cosmetic may become hard with time. Here, the content of the "monohydric linear aliphatic alcohol having 12 to 22 carbon atoms" in 100% by mass of the emulsified cosmetic of the present invention is 0.1% by mass or less (that is, 0 to 0.1% by mass). ) Is preferable, more preferably 0.05 mass% or less, still more preferably 0.01 mass% or less. In particular, when the emulsion cosmetic of the present invention is an emulsion, it is preferable to satisfy the above range.

Specific examples of the “monohydric linear aliphatic alcohol having 12 to 22 carbon atoms” include cetanol, behenyl alcohol, stearyl alcohol, cetearyl alcohol and the like. The “monohydric linear aliphatic alcohol having 12 to 22 carbon atoms” may be only one kind or may be two or more kinds.

In the present invention, the smaller the content of the electrolyte in the emulsified cosmetic, the better the storage stability, which is preferable. The content of the electrolyte in 100% by mass of the emulsified cosmetic of the present invention is preferably less than 0.3% by mass (that is, 0% by mass or more and less than 0.3% by mass), more preferably from the viewpoint of storage stability. It is 0.1 mass% or less. The content of the electrolyte is the total amount of all the electrolytes contained in the emulsion cosmetic of the present invention.

The above components A to G are not included in the "electrolyte" in the present specification. Examples of the electrolyte include monovalent metal salts, divalent or higher polyvalent metal salts, and the like. 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, aluminum salt and the like. Specifically, zinc paraphenol sulfonate, sodium chloride, potassium chloride, calcium chloride, magnesium chloride, magnesium sulfate, alum, sodium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, ammonium chloride, sodium phosphate, dihydrogen phosphate. Examples thereof include sodium, sodium dihydrogen phosphate, sodium citrate (trisodium citrate), edetate disodium, and potassium aluminum sulfate. The electrolyte also includes benzalkonium chloride and chlorohydroxyaluminum.

The pH of the emulsified cosmetic composition of the present invention is not particularly limited, but for example, at 25° C., 5.0 to 7.5 is preferable, and 5.5 to 7.0 is more preferable.

The viscosity of the emulsified cosmetic composition of the present invention is not particularly limited, but for example, the viscosity at 25° C. is preferably 500 to 80,000 mPa·s, and more preferably 1500 to 25,000 mPa·s. Viscosity is measured using a B-type viscometer with a rotor and a rotation speed that match the viscosity. In addition, when the said viscosity is 500-25000 mPa*s, the emulsion cosmetic of this invention is an emulsion.

The dosage form of the emulsion cosmetic of the present invention is not particularly limited, and examples thereof include cream and emulsion. Of these, emulsion is preferred.

The emulsified cosmetic of the present invention is not particularly limited, but examples thereof include skin care such as moisturizing cosmetics, whitening cosmetics, acne care cosmetics, anti-aging cosmetics (for example, for the purpose of suppressing wrinkle suppression, sagging suppression, etc.). Examples include cosmetics. The emulsion cosmetic of the present invention is preferably used as a skin cosmetic. The emulsion cosmetic of the present invention may be, for example, any of cosmetics, quasi drugs, pharmaceuticals, and miscellaneous goods.

The site to which the emulsion cosmetic of the present invention is applied is not particularly limited, and includes faces (for example, forehead, eyes, eyes, cheeks, mouth, etc.), arms, elbows, backs of hands, fingertips, feet, knees, heels, and necks. Sides, back, etc.

In the emulsified cosmetic composition of the present invention, it is preferable that the component A is contained in a hydrated state. Thereby, the effect of giving the skin a firmness is exhibited. In order to bring the component A into a hydrated state, it is preferable to heat the component A together with at least water in the production process of the emulsion cosmetic of the present invention. That is, the present invention also includes the following inventions.

In this specification, there is provided a method for producing an emulsified cosmetic in which Component A, Component B, Component C, Component D, and Component E are mixed, and the content of Component A is 0.2 to 3. 5% by mass, the content of the component B is 0.2 to 2.0% by mass, the content of the component D is 0.3% by mass or less, and the mass ratio of the component C to the component A (C/ A) is 0.03 to 0.35, the mass ratio (D/A) of the component D to the component A is 0.045 or more, and at least the component A is heated to 60° C. or more. A method for producing a characteristic emulsified cosmetic is included. In the above-mentioned production method, it is preferable to heat the component A to 65 to 90°C, more preferably 70 to 85°C. As an aspect of the above-mentioned manufacturing method, for example, an aqueous component (for example, component A, component C, component D, component E, electrolyte, etc.) and an oily component (component B, component F, component G, oil agent, etc.) are separately prepared. After heating, the two components are mixed to produce an emulsified cosmetic. The component A before heating is preferably in the state of a hydrophobic powder.

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 compounding amount and the content are amounts converted into pure components, and represent "mass%" unless otherwise specified.

Examples 1-14 and Comparative Examples 1-11 (preparation of emulsified cosmetics)
The emulsified cosmetics of Examples 1 to 14 and Comparative Examples 1 to 11 were prepared as follows according to the compositions shown in Table 1A, Table 1B, Table 2A and Table 2B.

As an aqueous phase, component A, component C, component D, component E, potassium hydroxide, glycerin, 1,3-butylene glycol, EDTA-2Na, and methylparaben were mixed and heated to 85°C. Further, as an oil phase, Component B, Component F, Component G, other emulsifier, and oil agent were mixed and heated to 85°C. Next, the water phase and the oil phase were mixed, stirred with a homomixer at a rotation speed of 6000 rpm for 5 minutes to emulsify, and cooled to 35° C. to prepare an emulsified cosmetic.

The pH of the emulsified cosmetic composition of Example 1 at 25°C was 6.5 and the viscosity at 25°C was 9260 mPa·s. Further, the emulsified cosmetics of the other examples had a pH of 25°C of 6.5 and a viscosity of 25°C in the range of 3280 to 42470 mPa·s. The emulsified cosmetic of Example 9 was creamy and the other Examples were emulsion.

Test Example 1: Storage stability of emulsified cosmetics (low temperature stability, high temperature stability)
(Low temperature stability)
The emulsified cosmetics of Examples and Comparative Examples were stored for 28 days in a constant temperature bath at -3°C. After each emulsified cosmetic after storage was allowed to stand for 4 hours at 25° C., the low temperature stability of each emulsified cosmetic was evaluated by the following method. Specifically, each emulsified cosmetic was thinly applied to a glass plate and the applied state was observed. Furthermore, the fluidity of the emulsion cosmetics in the form of emulsion was observed, and the state of the creamy emulsion cosmetics when scraped with a finger was observed. If it is a uniform coating state and has a fluidity when it is an emulsion, and it is easily scraped when it is a cream, it is evaluated as good low temperature stability (○), and a non-uniform coating state is obtained. Those that were present and had no fluidity in the case of an emulsion, and those having a high elasticity and being difficult to scrape in the case of a cream were evaluated as poor low temperature stability (x).

(High temperature stability)
The emulsified cosmetics of Examples and Comparative Examples were stored in a constant temperature bath at 40° C. for 28 days. Each emulsified cosmetic after storage after standing for 4 hours under conditions of 25 ° C., was evaluated high temperature stability of the emulsified cosmetic in the following manner. Specifically, the appearance of each emulsified cosmetic was observed. Furthermore, the fluidity of the emulsion cosmetics in the form of emulsion was observed, and the state of the creamy emulsion cosmetics when scraped with a finger was observed. Those with no separation or obvious viscosity decrease were evaluated as good high temperature stability (◯), and those with separation or obvious viscosity decrease were evaluated as poor high temperature stability (x).
The results are shown in Table 1A, Table 1B, Table 2A and Table 2B.

Test Example 2: Application feel of emulsified cosmetics (feeling of firmness, richness)
Three professional evaluators applied the emulsified cosmetics obtained in each Example and each Comparative Example to the inside of the forearm and compared the feel at the time of application with the emulsion of the following standard prescription, and the following criteria It was evaluated by.
<Standard prescription (milky lotion)>
Xanthan gum: 0.05 mass%
Carboxyvinyl polymer: 0.1% by mass
Hydrogenated lecithin: 1.0% by mass
POE-20 sorbitan monostearate: 0.5% by mass
Glyceryl monostearate: 0.5% by mass
Potassium hydroxide: 0.05 mass%
Liquid paraffin: 2.0 mass%
Dimethicone: 0.5 mass%
Isostearic acid PG: 2.0 mass%
Glycerin: 5.0 mass%
1,3-butylene glycol: 5.0 mass%
EDTA-2Na: 0.08 mass%
Methyl paraben: 0.2 mass%
Water: balance

<Evaluation criteria for firmness>
⊚ (excellent): It is much more elastic than the standard formulation.
○ (Good): A firmer feeling than the standard prescription is felt.
X (Poor): No clear difference in firmness is felt compared to the standard prescription.

<Evaluation criteria for richness>
⊚ (excellent): Remarkably superior in texture to the standard prescription.
○ (good): A clearer feeling than the standard prescription is felt.
X (Poor): No clear difference in body feel compared to the standard prescription.

The details of each component are as follows.
Corn starch octenyl succinate Al: AKZONOBEL, trade name “DRY-FLO PURE”, corn starch octenyl succinate aluminum xanthan gum: DSP Gokyo Food & Chemical Co., trade name “Echo Gum T”
Carboxyvinyl polymer: LUBRIZOL, product name "Carbopol 980"
Alkyl-modified carboxyvinyl polymer: manufactured by LUBRIZOL, trade name "PEMULEN TR-1"
Hydrogenated lecithin: Nikko Chemicals, trade name "Lecinol S-10"
POE-20 sorbitan monostearate: manufactured by Kao Corporation, product name "Leodol TW-S120V"
Liquid paraffin: manufactured by SONNEBORN, trade name "CARNATION #70"
Dimethicone: Toray Dow Corning, trade name "SH200C 10CS-JASU"
Isostearate PG: Aoki Yushi Kogyo Co., Ltd., trade name "Isostear Sun PG", propylene glycol isostearate

From the above Table 1A, Table 1B, Table 2A, and Table 2B, the following was found.
In the cases where the D/A value did not reach the specified range (Comparative Examples 1 and 10), the low temperature stability was poor. In the examples (Comparative Examples 2, 3 and 11) in which the amount of the component D exceeded the specified range, the product was in a non-uniform moromolo state, and it was clearly impossible to handle as an emulsion composition. Did not do that. In the case where the amount of the component A did not reach the specified range and the C/A value exceeded the specified range (Comparative Example 4), the firmness was inferior. In the example (Comparative Example 5) in which the amount of the component A exceeded the specified range and the C/A value did not reach the specified range, the low temperature stability was poor and application residue was generated during application to the skin. In the case where the amount of the component B did not reach the specified range (Comparative Example 6), the high temperature stability and the richness were poor, and the product was separated into two layers. In the example in which the amount of the component B exceeded the specified range (Comparative Example 7), the high temperature stability was poor, and the product had a reduced viscosity. In the case where the C/A value did not reach the specified range (Comparative Example 8), the low temperature stability was poor. In the example in which the C/A value exceeded the specified range (Comparative Example 9), the feeling of body was poor, and a slimy feeling was felt during application to the skin.

On the other hand, the emulsion of the present invention containing components A to E, the contents of component A, component B and component D are all within the specified ranges, and C/A value and D/A value are both within the specified range. It was found that the cosmetics (Examples 1 to 14) were excellent in storage stability at low temperature and high temperature, and were excellent in firmness and richness.

Prescription example 1 (milky lotion)
Octenyl succinate corn starch Al 1.0% by mass
Glyceryl monobehenate 1.2% by mass
Xanthan gum 0.05% by mass
Carbomer 0.1% by mass
Water balance Hydrogenated phospholipid 1.0% by mass
Polyglyceryl monostearate-10 0.5% by mass
Polyglyceryl octastearate-6 1.2% by mass
Glyceryl monostearate 0.5% by mass
Potassium hydroxide 0.05 mass%
Squalane 2.0 mass%
Glyceryl tri-2 ethylhexanoate 2.0 mass%
Shea butter 0.5 mass%
Isononyl isononanoate 1.0% by mass
Dimethicone 0.5% by mass
Glycerin 5.0 mass%
1,3-butylene glycol 5.0 mass%
Dipropylene glycol 3.0 mass%
Methyl paraben 0.2 mass%
Phenoxyethanol 0.2 mass%
Octoxyglycerin 0.2% by mass
l-menthol 0.05% by mass
Fragrance 0.02 mass%
Ethanol 5.0 mass%
Total 100% by mass

Prescription example 2 (cream)
Octenyl succinate corn starch Al 1.0% by mass
Glyceryl monobehenate 1.5% by mass
Xanthan gum 0.1% by mass
Carbomer 0.3% by mass
Water balance Hydrogenated phospholipids 2.0% by mass
Polyglyceryl monostearate-10 1.5% by mass
Glyceryl monostearate 0.7% by mass
Stearic acid 1.0 mass%
0.2 mass% potassium hydroxide
Squalane 5.0 mass%
Glyceryl tri-2 ethylhexanoate 5.0% by mass
Shea butter 1.5 mass%
Isononyl isononanoate 3.0% by mass
Dimethicone 1.0% by mass
Glycerin 10.0% by mass
1,3-butylene glycol 5.0 mass%
Dipropylene glycol 3.0 mass%
Methyl paraben 0.2 mass%
Phenoxyethanol 0.2 mass%
Octoxyglycerin 0.2% by mass
l-menthol 0.05% by mass
Fragrance 0.02 mass%
Ethanol 5.0 mass%
Total 100% by mass

The emulsified cosmetic composition of the present invention can be used as a cosmetic composition such as an emulsion or cream capable of imparting a firmness and a rich feel to the skin.

Claims (7)

Contains the following component A, the following component B, the following component C, the following component D, and the following component E,
The content of the component A is 0.2 to 3.5% by mass, the content of the component B is 0.2 to 2.0% by mass, and the content of the component D is 0.3% by mass. The mass ratio (C/A) of the component C to the component A is 0.03 to 0.35, and the mass ratio (D/A) of the component D to the component A is 0.045 or more. Is an emulsified cosmetic.
Ingredient A: Aluminum starch octenyl succinate in a hydrated state (excluding those in which ingredient A is in a powder state)
Component B: Glyceryl monobehenate Component C: Xanthan gum Component D: Carboxyvinyl polymer and/or alkyl-modified carboxyvinyl polymer Component E: Water Further, the emulsified cosmetic composition according to claim 1, further comprising the following component F.
Component F: phospholipid The emulsified cosmetic composition according to claim 1 or 2, further comprising the following component G.
Component G: Glyceryl monostearate and/or sorbitan monostearate The emulsion cosmetic according to any one of claims 1 to 3, which has a viscosity at 25°C of 500 to 80,000 mPa·s. The emulsified cosmetic according to any one of claims 1 to 4, wherein the content of the monohydric linear aliphatic alcohol having 12 to 22 carbon atoms is 0.1% by mass or less . The emulsified cosmetic composition according to claim 1, wherein the content of the electrolyte is less than 0.3% by mass. The emulsion cosmetic according to any one of claims 1 to 6, which is a skin cosmetic.