TW201532617A - Emulsified composition for external application - Google Patents

Abstract

The purpose of the present invention is to provide a composition for external application, which contains a water-soluble organic acid and a large amount of a clay mineral, and which is free from the occurrence of cracks during storage, while having a specific viscosity. The present invention is an emulsified composition for external application, which contains (A) a water-soluble organic acid and (B) 5% by weight or more of a clay mineral, while having a viscosity of 10,000 mPa.s or more.

Description

Emulsified topical composition

The present invention relates to an emulsified external composition containing a water-soluble organic acid and a high content of a clay mineral having a viscosity of a certain value or more and suppressing cracking of the preparation.

Generally, the fine particle portion of the clay mineral has strong chemisorption, and has the property of adsorbing water, oil component or protein between the microparticles, or preventing the evaporation of water from the skin. By using these properties, clay minerals are widely used in compositions for removing skin and oil such as lipids or proteins of skin, peeling parts, skin pores, and skin softening properties (for example, Patent Document 1).

When the content of the clay mineral in the composition is high, the composition of the clay mineral is 5% by weight or less than 1% by weight, etc., because the composition has a high viscosity and is difficult to apply. Patent Documents 1 to 4).

In addition, various types of emulsifiers (creams, etc.) such as emulsifiers (creams, etc.) are prepared by dispersing clay (such as lotion) or dispersing surfactants in water as a formulation type of the external composition (Patent Document 1) 2 and 4). and then, Although clay minerals generally gel by water swelling and increase the viscosity of the composition, generally, if the pH is in the acidic range, the gelation state becomes unstable, and it is difficult to maintain a certain viscosity, so the pH is controlled. The organic acid salt is prepared in the above composition for the purpose of improving the stability of the preparation and the like (Patent Documents 1 and 2).

On the other hand, it is also disclosed that the effect of the clay mineral is further induced, the viscosity of the preparation is treated, and the composition for external use is increased (Patent Documents 5 and 6).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] JP-A-2000-191433

[Patent Document 2] JP-A-2000-191436

[Patent Document 3] JP-A-2001-31553

[Patent Document 4] JP-A-2002-121128

[Patent Document 5] JP-A-2003-81879

[Patent Document 6] Special Fair No. 3-72202

However, the water-soluble organic acid has a peeling effect of exfoliating non-keratin, and is suitable for use in cosmetics, so it is widely used.

The present inventors have considered a combination of a water-soluble organic acid in a composition which further induces the effect of the above-mentioned clay mineral and increases the blending amount thereof. Next, it contains sticky The composition other than soil minerals is particularly suitable for use on the skin for a certain period of time, by wiping off from the skin or by rinsing with water, etc., because it can be suitably used as a cosmetic material for removing unnecessary keratin or oil components as a suitable part. Therefore, it is also guaranteed to have the proper viscosity as such a preparation.

However, when such a specific composition and a composition other than the viscosity were prepared, it was judged that a crack occurred when the composition was stored. Such a crack is a problem in an important appearance of a cosmetic-related product, and when the external composition is used as a tubular-filled product, it is considered that the composition cannot be smoothly extruded from the tube.

Therefore, the present invention has been made in order to solve such a problem, and to provide a clay mineral containing a water-soluble organic acid and a high compounding amount, which has a specific viscosity and which does not cause cracks during storage.

In order to solve the above problems, the inventors of the present invention have found that the composition of the above composition can be emulsified to prevent the occurrence of cracks, and the present invention has been completed.

That is, the gist of the present invention is as follows.

<1> Containing (A) a water-soluble organic acid, and (B) a clay mineral of 5% by weight or more, and a viscosity of 10,000 mPa. An emulsified external composition of s or more.

<2> The emulsified external composition according to <1>, wherein the water-soluble organic acid (A) is a hydroxycarboxylic acid.

<3> The emulsified external composition described in <1> or <2>, the aforementioned clay The content of the mineral (B) in the emulsified external composition is 5 to 50% by weight.

The emulsified external composition according to any one of <1>, wherein the water-soluble organic acid (A) is an α-hydroxy acid.

The emulsified external composition according to any one of <1>, wherein the water-soluble organic acid (A) is selected from the group consisting of lactic acid, glycolic acid, malic acid, tartaric acid, citric acid, glyceric acid, and acetone. At least one of a group consisting of acid, mandelic acid, gluconic acid, phytic acid, succinic acid, malonic acid, and oxalic acid.

The emulsified external composition according to any one of <1> to <5> wherein the clay mineral (B) is selected from the group consisting of silt, marine sludge, Tanakura clay, and smectite. Clay minerals, kaolin clay minerals, serpentine clay minerals, pyrophyllite clay minerals, mica clay minerals, vermiculite clay minerals and chlorite clay minerals At least one of them.

The emulsified external composition according to any one of <1> to <6> wherein the clay mineral (B) is selected from the group consisting of sludge, marine sludge, shoal clay, bentonite, montmorillonite, and lithium. At least one of a group of bentonite (hectorite) and kaolin.

The emulsified external composition according to any one of the above aspects, wherein the oil phase component in the emulsified external composition contains a hydrocarbon oil, an ester oil, a higher alcohol, and a higher fatty acid. At least one of the groups.

<9> The emulsified external composition according to any one of <1> to <8> Beauty materials for things.

According to the present invention, there is provided a composition comprising a water-soluble organic acid and a highly formulated clay mineral having a certain viscosity and which does not undergo cracking during storage.

Fig. 1 is a photograph showing the results of evaluation of the stability of the preparations of Comparative Examples 1 to 3. The order from the left is the test preparation of Comparative Examples 1, 2, and 3.

Fig. 2 is a photograph showing the results of evaluation of the stability of the preparations of Examples 1 to 4 and Comparative Example 4. The order from the left is the test preparation of Comparative Example 4, Examples 1, 2, 3, and 4.

Fig. 3 is a photograph showing the results of evaluation of the stability of the preparations of Examples 5 to 7. The order from the left is the test formulation of Examples 5, 6, and 7.

Fig. 4 is a photograph showing the results of evaluation of the stability of the preparations of Comparative Examples 5 to 8. The order from the left is the test preparation of Comparative Examples 5, 6, 7, and 8.

[The best form for implementing the invention]

The invention is described in detail below.

[Emulsified external composition]

As described above, the emulsified external composition of the present invention contains water-soluble Organic acids and highly formulated clay minerals with a certain viscosity. Hereinafter, the preparation method of each of these components and other components, the emulsified external composition of the present invention, and the like will be described.

<(A) Water-soluble organic acid>

Since the emulsified external composition of the present invention contains a water-soluble organic acid (A), it has an exfoliating effect. Further, the term "water-soluble" as used herein means that the amount of water dissolved in 1000 g of 25 ° C is 1 g or more (generally 900 g or less).

From the viewpoint of exfoliating effect, the above-mentioned water-soluble organic acid (A) is preferably a hydroxycarboxylic acid. The hydroxycarboxylic acid is a compound having a hydroxyl group and a carboxyl group. The number of such functional groups is not particularly limited, but usually, the number of the hydroxyl groups is 1 to 10, and the number of the carboxyl groups is 1 to 5.

Further, from the viewpoint of a good exfoliating effect, the water-soluble organic acid (A) is preferably α-hydroxy acid.

Examples of such a water-soluble organic acid (A) include lactic acid, glycolic acid, malic acid, tartaric acid, citric acid, glyceric acid, pyruvic acid, mandelic acid, gluconic acid, phytic acid, and succinic acid. Malonic acid, oxalic acid, etc., among these, from the viewpoint of exfoliating effect, lactic acid, glycolic acid, malic acid, tartaric acid, citric acid, and gluconic acid are preferred.

The water-soluble organic acid (A) described above may be used alone or in combination of two or more.

Further, the content of the water-soluble organic acid (A) in the emulsified external composition (100% by weight) of the present invention is usually 0.01 to 20% by weight, 0.5 to 10% by weight is preferred. When the content of the water-soluble organic acid (A) is less than 0.01% by weight, the exfoliating effect tends not to be obtained. On the other hand, when it exceeds 20% by weight, the emulsified external composition of the present invention may not inhibit cracking.

<(B) Clay Minerals>

The emulsified external composition of the present invention contains a highly formulated clay mineral (B). Specifically, the amount is 5% by weight or more based on 100% by weight of the emulsified external composition. If the blending amount is less than 5% by weight, even if the water-soluble organic acid (A) coexists, there is no problem of cracking, but if the clay mineral (B) having a high blending amount is contained and the water-soluble organic acid (A) coexists, the viscosity When it is more than a certain amount, the problem of cracking occurs.

The clay mineral (B) is excellent in the cleaning action by adsorbing oil and fat components or proteins as described in the [Prior Art], and the emulsified external composition of the present invention is applied to the skin, and it is expected that the unnecessary oil component or the like can be removed. Keratin, etc., make the skin clean and beautiful.

The clay mineral (B) in the present invention is not particularly limited, and a clay mineral which is conventionally widely used may be used, and the clay mineral (B) may be either a natural product or a synthetic product.

As examples of the aforementioned clay mineral (B), there may be mentioned silt; marine sludge; shed silt; bentonite, montmorillonite, helictite, beidellite, and nontronite ( Nontronite) Saponite, smectite, sauconite, and smectite clay minerals; kaolin, nacrite, earth Kaolin clay minerals such as dickite, halloysite, and chrysotile; antigorite, amesite, and cronstedtite The antigorite is a clay mineral; a pyrophyllite and a pyrophyllite clay mineral such as Talc; illite, glauconite, celadonite, Mica clay minerals such as sericite, mica, muscovite, chrome mica and biotite; vermiculite clay minerals such as vermiculite; and green mud such as chlorite Stone clay minerals, etc.

The aforementioned sludge is a deposit in a lake in various regions, for example, a deposit (sea mud) in the sea such as the south-central part of Okinawa Prefecture, and the shed silo is a deposit of a fractured zone of a shed in Fukushima Prefecture.

In addition, as a commercial product of the clay mineral (B), Milonecton, Milonecton R (above, manufactured by Dainippon Kasei Co., Ltd.), marine sludge FP (manufactured by Encore. Un.), Kunipia, and Sumecton (the above is manufactured by Kunimine Industries, Inc.) ), Begum (manufactured by Vanderbilt Co., Ltd.) and Benton LT (manufactured by Toshinaga Chemical Co., Ltd.).

In the viewpoint of the skin cleansing effect or the feeling of use of the emulsified external composition of the present invention at the time of preparation, sludge, marine sludge, shoal clay, bentonite, montmorillonite, lithium swell Hectorite and kaolin are suitable.

The clay mineral (B) described above may be used alone or in combination of two or more.

In addition, the content of the above-mentioned clay mineral (B) in the emulsified external composition (100% by weight) of the present invention is effectively suppressed by the skin washing action and the crack of the subject of the present invention. 5 to 50% by weight is preferred, preferably 7 to 40% by weight, more preferably 10 to 30% by weight, and particularly preferably 15 to 25% by weight.

Further, the content ratio of the clay mineral (B) to the water-soluble organic acid (A) is not particularly limited, but may be, for example, 1 part by weight of the component (A), and the component (B) is usually in the range of 0.25 to 500 parts by weight, preferably 1 to 60 parts by weight, more preferably 2 to 6 parts by weight.

<Surfactant>

Since the composition of the present invention is an emulsified external composition, it usually contains a surfactant.

As the aforementioned surfactant in the present invention, a user conventionally used in the art can be widely used. As the aforementioned surfactant, for example, Sorbitol monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, diglycidyl pentoxide A sorbitan fatty acid ester such as diglyceryl sorbitan tetraoctanoate; a propylene glycol fatty acid ester such as propylene glycol monostearate; a polyethylene glycol fatty acid such as polyethylene glycol monoisostearate Ester; polyoxyethylene hardened castor oil 40 (HCO-40), polyoxyethylene hardened castor oil 50 (HCO-50), polyoxyethylene hardened castor oil 60 (HCO-60) and polyoxyethylene hardened castor oil 80 ( Polyoxyethylene hardened castor oil derivatives such as HCO-80); fatty acid glycerides such as glyceryl stearate (glyceryl monostearate), glyceryl oleate, etc.; polyoxyethylene (20) sorbitan single Laurelate 20, Polyoxyethylene (20) Polysorbate 60, Polyoxyethylene (20) Polysorbate 80 and Polyoxyethylene (20) polyoxyethylene sorbitan fatty acid esters such as sorbitan isostearate; polyoxyethylene mono-coco fatty acid glycerin; glycerol Alkyl glucoside; polyoxyethylene cetyl ether and polyoxyalkylene alkyl ether such as polyoxyethylene lauryl ether; amines such as stearylamine and oleylamine.

From the viewpoint of effectively suppressing the occurrence of cracks, it is preferred to use a polyoxyethylene hardened castor oil derivative and a fatty acid glyceride.

The surfactant in the present invention may be used alone or in combination of two or more.

Further, the surfactant content of the emulsified external composition (in 100% by weight) of the present invention can effectively suppress the emulsification of cracking, and is usually 0.1 to 10% by weight, and 0.5 to 5% by weight. should.

<oil phase composition>

The emulsified external composition of the present invention may be any of the O/W type and the W/O type, and it is determined which emulsified form is appropriately selected depending on the use of the emulsified external composition described later. The method of adjusting the emulsified form is known to the manufacturer.

The substance constituting the oil phase in the emulsified external composition of the present invention is not particularly limited, and an oil component used in a conventional external composition can be used. Examples of the oily oil, ester oil, higher alcohol, and higher fatty acid can be used as the examples. .

Specific examples of the hydrocarbon oil include squalane, squalene, paraffin, mobile paraffin, light-flow paraffin, heavy-flow paraffin, microcrystalline wax, and glycerin.

Specific examples of the ester oil include isobutyl adipate, 2-cetyl adipate, isohexadecyl isostearate, and trimethylolpropane triisostearate. , triethyl 2-ethylhexanoate, cetyl octanoate, oleyl oleate, octyl dodecyl oleate, isohexadecyl stearate, butyl stearate, hard Glycerylglyceride, isopropyl palmitate, 2-ethylhexyl palmitate, 2-hexadecyl palmitate, cetyl palmitate, isopropyl myristate, octyl myristate Dodecyl ester, myristyl myristate, ethyl laurate and diisostearyl malate.

Specific examples of the higher alcohol include cetyl alcohol, cetostearyl alcohol, stearyl alcohol, behenyl alcohol, octyldodecanol, isostearyl alcohol, lauryl alcohol, and meat. Stigmasterol, palmitol, hexadecane Alcohol, oleyl alcohol, hexyldodecanol, batyl alcohol, phytosterols and cholesterol.

Specific examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid, oleic acid, linoleic acid, linolenic acid, and arachidic acid. Carbaenoic acid, docosahexaenoic acid, isostearic acid, and the like.

These oil phase components may be used alone or in combination of two or more. The content of the oil phase component in the emulsified external composition (100% by weight) of the present invention is usually 0.1 to 15 parts by weight. %degree.

<Other ingredients>

The emulsified external composition of the present invention contains the above-described water-soluble organic acid (A) and clay mineral (B), and usually contains the above-mentioned surfactant and oil component, and may further contain, for example, the following description Other ingredients. The content of the components is a known range, and the effect of each component is not impaired by the effect of the present invention. Each component may be used alone or in combination of two or more. The component system may be used alone or in combination of two or more.

Such other components are distributed in the aqueous phase or the oil phase of the emulsified external composition of the present invention depending on its hydrophilicity (hydrophobicity).

(organic acid salt)

As mentioned above, because the clay mineral (B) depends on the pH of the composition. Since the state of gelation is changed, in order to maintain the emulsified external composition of the present invention within a certain range, the composition may contain an organic acid salt which functions as a buffer. Specific examples of such a potassium salt, a sodium salt, a calcium salt, and the like include citric acid, malic acid, succinic acid, lactic acid, tartaric acid, pyrrolidone carboxylic acid, and gluconic acid.

(tackifier)

The emulsified external composition of the present invention is suitably used for applications requiring a certain viscosity as described later. The viscosity of the composition is increased by the presence of the clay mineral (B), but when it is not sufficient, the viscosity of the emulsified external composition can be made to an appropriate range by blending the tackifier. Examples of such a specific example include methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, and carboxy. Cellulose tackifier such as ethyl cellulose, guar gum, Sanxian gum, pectin, pululolan, gelatin, locust bean gum, cold weather, polyvinyl alcohol, polyvinylpyrrolidone, sodium polyacrylate, poly Acrylamide, polyethylene glycol, alginic acid, propylene glycol alginate, macrogol, sodium chondroitin sulfate, hyaluronic acid, sodium hyaluronate, (hydroxyethyl acrylate / acryl dimethyl tauro Sodium (meth) copolymer, (acryloyldimethyl tauryl taurate / vinyl pyrrolidone) copolymer, polyacrylic acid crosslinked polymer, and the like.

<chelating agent>

When the emulsified external composition of the present invention is stored, water and moisture may float out of the upper part of the composition, and at this time, it is considered to be from a clay mineral. (B) The influence of metals such as water sometimes colors. Since such an appearance necessarily imparts an unpleasant feeling to the user, it is preferred to prepare the emulsified external composition by blending a chelating agent to prevent the aforementioned coloring. As this specific example, EDTA can be cited. 2 sodium salt and EDTA. calcium. 2 sodium salt and so on.

(preservative)

In order to improve the preservation stability of the emulsified external composition of the present invention, a preservative may be formulated in the composition. Specific examples of the compound include phenoxyethanol, benzoic acid, sodium benzoate, dehydroacetic acid, sodium dehydroacetate, isobutyl p-hydroxybenzoate, isopropyl p-hydroxybenzoate, and butyl p-hydroxybenzoate. , ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, benzyl p-hydroxybenzoate and methyl p-hydroxybenzoate.

(Polyol)

In order to impart a moisturizing action to the emulsified external composition of the present invention, a polyol may also be formulated. Examples of such a specific example include glycerin, diglycerin, triglycerin, propylene glycol, dipropylene glycol, 1,3-butylene glycol, ethylene glycol, diethylene glycol, isobutylene glycol, and 1,3-butylene glycol. Sorbitol, xylitol, erythritol, mannitol, pentanediol, hexanediol, octanediol, decanediol, and neopentyl glycol.

(powder)

By formulating the powder in the emulsified external composition of the present invention, in particular, the above composition enhances the adhesion to the skin when the application of the cosmetic material is used. sense. As the powder, the inorganic powder, the organic powder, the pigment, and the like are generally used as a cosmetic raw material. Examples of the specific examples include titanium oxide, zinc oxide, calcium carbonate, aluminum niobate, and niobium ruthenate. , cerium oxide, barium sulfate, calcium phosphate, calcium carbonate, boron nitride, iron oxide, nylon, polyethylene powder, polystyrene powder, polyalkyl methacrylate powder, cellulose powder, urethane Powder and trimethylsilsesquioxane powder, etc. Further, it is also possible to use a surface treatment agent in which the powder is hydrophobized or the like.

(pH adjuster)

The emulsified external composition of the present invention adjusts the pH, adjusts the gelation state of the clay mineral (B), etc., and controls the viscosity of the composition to improve the feeling of use, and may contain a pH adjuster. Specific examples of the inorganic acid (hydrochloric acid, sulfuric acid, etc.), inorganic bases (potassium hydroxide, sodium hydroxide, etc.), and organic bases (triethanolamine, diisopropanolamine, triisopropanolamine, etc.) may be mentioned.

In addition to the other components described above, the emulsified external composition of the present invention can be formulated with ingredients such as dyes, ultraviolet absorbers, and humectants, depending on the intended use, without impairing the efficacy of the present invention. Preservatives, spices, various pharmaceuticals, etc.

<Modulation method of emulsified external composition>

The emulsified external composition of the present invention can be prepared by mixing and emulsifying the various components described above according to a known method. Can mention this An example of a modulation method is as follows. The aqueous phase and the oil phase were separately prepared and heated to 70 ° C or higher. Thereafter, the two phases are mixed and stirred at a temperature of 70 ° C or higher, and if necessary, a mechanical stirring force such as a homogenizer is applied to prepare the emulsified external composition of the present invention.

When a water-soluble organic acid (A) coexists in a composition having a certain viscosity of a clay mineral (B) having a high content of 5% by weight or more, cracks occur during storage. The present inventors have found that the occurrence of cracks can be prevented by emulsification of a composition containing such two components.

Further, the preparation of the emulsified external composition of the present invention is usually carried out by blending a water-soluble organic acid (A), but even if the salt is blended, if hydrochloric acid or the like is added to lower the pH of the composition, the water-soluble organic acid of the weak acid The acid (A) is free. When the composition is prepared, the water-soluble organic acid (A) is not added, but an emulsified external composition containing a free water-soluble organic acid (A) as a result of adjusting the pH or the like is also included in the scope of the present invention.

<Characteristics of emulsified external composition> (viscosity)

The emulsified external composition of the present invention contains a plurality of components called clay minerals (B) which have an increased viscosity, and has a high viscosity suitable for applications such as cosmetic materials. Specifically, the viscosity of the emulsified external composition of the present invention is 10000 mPa. s above. Viscosity is less than 10000mPa. s, when applied to the skin, the composition is easy to slip off the skin, and can not fully exert the fat component of the clay mineral (B). Protein adsorption effect. In addition, in the present specification, the term "viscosity" means using a TV10 type viscometer, and an H7 rotor. The viscosity was measured at 25 ° C at a rotation speed of 20 rpm and measured after 30 seconds.

The viscosity of the emulsified external composition of the present invention is 10,000 to 300,000 mPa from the viewpoint of a suitable viscosity in various uses. s is appropriate, with 10000~100000mPa. s is especially good. The viscosity of the above composition can be adjusted by adjusting the content of the component having a viscosity-increasing effect such as clay mineral (B) or pH.

(pH)

The pH of the emulsified external composition of the present invention is not particularly limited as long as the water-soluble organic acid (A) exhibits an exfoliating effect, and is usually in the range of 1 to 7, in the range of 3 to 6 good.

The clay mineral (B) is gelled by the presence of water, whereby the desired viscosity of the emulsified external composition of the present invention can be imparted. However, if the pH is low, the gelation state may become unstable and the viscosity may be changed. Not enough. However, for the composition of the present invention, even in a weakly acidic environment such as pH 5, a so-called 10000 mPa can be achieved. Suitable viscosity for applications such as cosmetic materials above s.

[Use of emulsified external composition]

The emulsified external composition of the present invention contains a water-soluble organic acid (A) and a fat component which are excellent in exfoliating effect. A clay mineral (B) with good protein adsorption and 10,000 mPa. s above the higher viscosity.

With regard to these characteristics, the emulsified external composition of the present invention is a cosmetic material which is especially suitable for use on the skin for a certain period of time, and is removed by wiping off from the skin, washing with water or peeling off, etc., and is suitable for removing unnecessary keratin from the used portion. Or the use of facial ingredients for oils and fats.

The form of the preparation for the cosmetic material is not particularly limited, and a cream-like or mud-like application form may be used, and the substrate such as a nonwoven fabric may be impregnated with an emulsified external composition or a sheet of the composition layer formed on the surface of the substrate. A form of preparation or the like conventionally used for a cosmetic material.

In the case of a smear-type preparation, the emulsified external composition is used, for example, in a tubular container or a cylindrical container. Examples of the material of the container include polyethylene (HDPE, LDPE, and LLDPE), polyethylene terephthalate, polypropylene, ABS resin, ethylene-vinyl alcohol resin, polystyrene, glass, and metal (aluminum, etc.). )Wait. In addition, these materials are used as containers in consideration of strength, flexibility, weather resistance, stability of components such as the above-mentioned composition or materials, and the like, and various coating treatments or such materials, for example, mixing or the like, are combined and laminated. Material use. Since the emulsified external composition of the present invention suppresses the occurrence of cracks, the composition can be smoothly discharged from the tubular container, and the user is not unpleasant in appearance.

In the case of the sheet-form preparation, especially the crack of the composition becomes a problem in appearance, but since the emulsified external composition of the present invention suppresses it, it is possible to provide a sheet-form preparation having a good appearance.

If a cosmetic material using the emulsified external composition of the present invention is used, the exfoliating effect of the water-soluble organic acid (A) and the fat component by the clay mineral (B) are used. Protein removal, anticipation can be removed The oily ingredients or keratin, various dirt, etc., clean and make the skin beautiful.

[Examples]

Hereinafter, the present invention will be described in more detail by way of examples, but the invention is not limited thereto. In addition, the following numerical units are "% by weight" unless otherwise specified.

[Test Example Preparation Stability Evaluation]

The test preparations of the examples and the comparative examples were prepared according to the usual methods in accordance with the compositions shown in the following Tables 1 to 4. Specifically, the water-soluble component is dissolved in the aqueous phase of the purified water, and the viscosity mineral and the oil-soluble component are dispersed in the aqueous phase. Further, in the example group, the aqueous phase and the oil phase (viscosity mineral and oil-soluble component) were mixed in a state of being heated to 70 ° C to 80 ° C, and emulsified by a homogenizer to prepare an emulsified composition.

30 g of each of the obtained test preparations was filled in a transparent glass vial, sealed, and stored at 50 °C. After 24 hours, whether or not cracks occurred in each of the test preparations was visually observed. The results (photographs) are shown in Fig. 1 (Comparative Examples 1 to 3), 2 (Examples 1 to 4 and Comparative Example 4), and 3 (Example 5~). 7) and 4 (Comparative Examples 5 to 8).

In addition, the viscosity of each test preparation was placed in a 30 ml glass screw cap bottle, using a TV10 type viscometer, using an H7 rotor at 25 ° C, a rotation speed of 20 rpm, starting from the rotation, after 30 seconds. Value (in addition, the measurement limit (upper limit) of the viscometer is 200,000 mPa.s).

Comparative Examples 1 to 3 are unemulsified compositions. Although any one contains water-soluble organic acids (lactic acid and gluconic acid), and further contains 30% by weight or more of high content of clay minerals, but the viscosity is less than 10,000 mPa. In Comparative Example 1 of s, no crack occurred, and cracks occurred in Comparative Examples 2 and 3 exceeding it.

However, as in Examples 1-7, even water-soluble organic acids and high levels of clay minerals are present, and the viscosity exceeds 10,000 mPa. s, the formulation is prevented from cracking by emulsification. On the other hand, Comparative Example 4 which was not emulsified was cracked in the same manner as Comparative Examples 2 and 3.

Further, Comparative Examples 5 to 8 are unemulsified compositions. Comparative Example 5 is a blend of high-content clay minerals, although the viscosity also exceeds 10,000 mPa. s, but not mixed with water-soluble organic acid, no cracks. In such a composition, when a water-soluble organic acid was blended (Comparative Example 6), cracks occurred. On the other hand, Comparative Example 7 is a blend of a water-soluble organic acid and a clay mineral, although However, the viscosity exceeds 10,000 mPa. s (polyacrylic acid cross-linked polymer-6 blended as a tackifier), the clay mineral content is less than 5% by weight, and no cracks occur. In addition, Comparative Example 8 was blended with a high content of clay minerals, although the viscosity exceeded 10,000 mPa. s, but the water-soluble organic acid is not blended, and instead a salt of a water-soluble organic acid is blended (and the pH is in the basic region). It can be seen that there is no crack in the composition.

[Formulation Example]

The emulsified external composition of the present invention having the composition shown in Table 5 below (Examples 8 to 13) was prepared in the same manner as in the above [Test Example]. In addition, the viscosity of the emulsified external composition is 10000 mPa. Above s, the pH is in the range of 3 to 7.

Claims (9)

An emulsified external composition characterized by (A) a water-soluble organic acid, and (B) a clay mineral of 5% by weight or more, and a viscosity of 10,000 mPa. s above. The emulsified external composition according to the first aspect of the invention, wherein the water-soluble organic acid (A) is a hydroxycarboxylic acid. The emulsified external composition according to Item 1 or 2 of the patent application, wherein the content of the clay mineral (B) in the emulsified external composition is 5 to 50% by weight. The emulsified external composition according to any one of claims 1 to 3, wherein the water-soluble organic acid (A) is an α-hydroxy acid. The emulsified external composition according to any one of the items 1 to 3, wherein the water-soluble organic acid (A) is selected from the group consisting of lactic acid, glycolic acid, malic acid, tartaric acid, citric acid, glyceric acid, At least one of a group consisting of pyruvic acid, mandelic acid, gluconic acid, phytic acid, succinic acid, malonic acid, and oxalic acid. The emulsified external composition according to any one of claims 1 to 5, wherein the clay mineral (B) is selected from the group consisting of silt, marine sludge, Tanakura clay, and bentonite ( Smectite) is a clay mineral, a kaolin clay mineral, a serpentine clay mineral, a pyrophyllite clay mineral, a mica clay mineral, a vermiculite clay mineral, and a chlorite clay mineral. At least one of the groups. The emulsified external composition according to any one of claims 1 to 6, wherein the clay mineral (B) is selected from the group consisting of sludge, marine sludge, shed silt, bentonite, montmorillonite, At least one of a group of lithium bentonite (hectorite) and kaolin. The emulsified external composition according to any one of the items 1 to 7, wherein the oil phase component in the emulsified external composition contains a hydrocarbon oil, an ester oil, a higher alcohol, and a higher fatty acid. At least one of the groups. A cosmetic material comprising the emulsified external composition according to any one of claims 1 to 8.