JP6879670B2 - Topical composition for concealing wrinkles and / or pores - Google Patents

Description

The present invention relates to an external composition for concealing wrinkles and / or pores, which has improved powder dispersion stability.

In recent years, with the growing interest in beautiful skin, attention has been focused on aging care to give a natural and youthful impression. In particular, wrinkles and open pores are major factors that worsen the impression of the skin, and coping with wrinkles and pores has become a major cosmetic concern.

Conventionally, as a countermeasure against wrinkles and pores, a beauty method has been known in which wrinkles and pores are concealed and made inconspicuous by using an external composition containing powders such as silicon dioxide and titanium oxide. However, since the powder has poor dispersion stability, the external composition containing the powder has a problem that lumps are generated in the process of formulation and the powder is settled or agglomerated over time. .. Therefore, for external compositions used for concealing wrinkles and pores, a formulation technique for improving the dispersion stability of powder is required.

So far, various formulation techniques for enhancing the dispersion stability of powders in external compositions have been proposed. For example, in Patent Document 1, in an oil-in-water emulsified composition, the oil layer contains a hydrophobized powder, 50% by mass or more of silicone oil, and a polyoxyalkylene-modified polysiloxane and / or isostearic acid. , It has been reported that the dispersion stability of powder can be improved. Further, Patent Document 2 states that in an oil-in-water emulsified composition, a specific amount of silicone oil, an amphipathic substance having an HLB of 5 or less, and a specific acrylic silicone are contained in an oil layer, so that the powder has good dispersion stability. It has been reported that it can be equipped with sex. According to Patent Document 3, an oil-in-water emulsified composition containing an aqueous phase containing a copolymer of acryloyldimethyltaurine salt and hydroxyethyl acrylate and an oil phase containing powder improves powder aggregation and sedimentation. It has been reported that it can be done. Patent Document 4 reports that the dispersion stability of powder is improved by coexistence of powder and specific biterminal silicone-modified glycerin in cosmetics.

However, in Patent Documents 1 to 4, the HLB balance is improved because the dispersion stability of the powder in the emulsified composition is improved by using the compound corresponding to the nonionic surfactant. There is a drawback that the phase is easily changed when the mixture is broken, which affects the emulsion stability and restricts the components that can be blended. Further, in the formulation techniques of Patent Documents 1 to 4, when a large amount of powder is blended, sufficient dispersion stability may not be ensured.

Against the background of such conventional techniques, the development of new techniques for improving the dispersion stability of powders in external compositions used for concealing wrinkles and / or pores is required.

Japanese Unexamined Patent Publication No. 2004-210698 Japanese Unexamined Patent Publication No. 2005-247722 Japanese Unexamined Patent Publication No. 2006-8796 Japanese Unexamined Patent Publication No. 2007-008915

An object of the present invention is to provide a formulation technique for improving the dispersion stability of a powder in an external composition used for concealing wrinkles and / or pores.

As a result of diligent studies to solve the above problems, the present inventor has found that when a heparin-like substance is blended with a powder in an external composition used for concealing wrinkles and / or pores, the dispersion stability of the powder is obtained. It was found that the amount was significantly improved, sedimentation, aggregation, and formation of lumps were suppressed, and excellent formulation stability could be provided.

In addition, when the external composition is further blended with starch acrylate, the present inventor makes it easier for the powder to penetrate into the pores and wrinkles, and the powder that has entered the wrinkles and pores becomes familiar with the skin and becomes the original skin. It has been found that it can exhibit a similar texture and can exert an excellent concealing effect on pores and wrinkles. Furthermore, it has been found that the external composition is excellent in terms of sustainability of the hiding effect, because once the powder has entered the wrinkles and pores, it is difficult to remove the powder.

The present invention has been completed by further studies based on these findings. That is, the present invention provides the inventions of the following aspects.
Item 1. An external composition used for concealing wrinkles and / or pores, which comprises a powder and a heparinoid.
Item 2. Item 2. The external composition according to Item 1, wherein the powder has an average particle size of 0.1 to 30 μm.
Item 3. Item 2. The external composition according to Item 1 or 2, further comprising acrylic acid starch.
Item 4. Item 2. The external composition according to any one of Items 1 to 3, wherein the powder contains a powder having a refractive index of 1.3 to 2.0 and a powder having a refractive index of 2.2 to 2.8.
Item 5. Item 2. The external composition according to any one of Items 1 to 4, which contains iron oxide as the powder.

Since the external composition of the present invention has improved dispersion stability of powder, it can suppress sedimentation and aggregation of powder when it is formulated in liquid form, and it is formulated in a semi-solid form (cream-like, etc.). When it is formed, it can prevent the powder from agglomerating or becoming lumpy, so that it has excellent formulation stability.

Further, in one aspect of the external composition of the present invention, the powder easily penetrates into wrinkles and pores, and the powder that has penetrated into wrinkles and pores can be blended into the skin to give the same texture as the skin. Wrinkles and pores can be finished with the same texture as the original skin, making wrinkles and pores less noticeable. Further, in one aspect of the external composition of the present invention, since the powder once entered into the wrinkles and pores is difficult to be separated, the powder is retained in the wrinkles and pores even when the body moves in daily life, and the wrinkles are formed. And the effect of hiding pores can be sustained.

It is a photograph which shows the result of having evaluated the dispersion stability of the powder in the external composition of Example 7 and Comparative Example 5 in Test Example 1.

The external composition of the present invention is an external composition used for concealing wrinkles and / or pores, and is characterized by containing powder and a heparin-like substance. Hereinafter, the external composition of the present invention will be described in detail.

In the present specification, "powder permeability" refers to the ease with which powder can enter into wrinkles and pores, and "skin texture" refers to the original skin in the wrinkles and pores where powder has entered. It refers to the appearance state that visually resembles the skin quality to the part, and "powder retention" refers to the characteristic that powder once entered into wrinkles and pores is difficult to separate and is retained in wrinkles and pores. Point to.

Powder The present invention contains powder to conceal wrinkles and pores. The powder used in the present invention may be any concealing inorganic powder conventionally used for the purpose of concealing wrinkles and pores in the external composition. Specific examples of such powders include those having a property of not dissolving and swelling in water or an organic solvent, that is, insoluble non-swelling powders.

The type of insoluble non-swellable powder is not particularly limited, but for example, kaolin-based clay mineral, pyrophyllite-based clay mineral, mica-based clay mineral, green mudstone-based clay mineral, calcined clay mineral, and zeolite-based clay mineral. , Metal oxides and the like.

Specific examples of kaolin-based clay minerals include kaolin (kaolinite), halloysite, nacrite, deckite, and chrysotile.

Specific examples of the pyrophyllite-based clay mineral include talc and pyrophyllite.

Specific examples of mica-based clay minerals include square mica (mica), sericite (serisite), muscovite (mascovite), gold mica (frogobite), synthetic mica, red mica (richia mica), and black mica. (Biotight) and the like.

Specifically, chlorite or the like can be preferably used as the chlorite-based clay mineral.

Specific examples of the calcined clay mineral include calcined mica, calcined talc, and calcined sericite.

Specific examples of the zeolite-based clay mineral include natural zeolite and synthetic zeolite.

Specific examples of the metal oxide include iron oxide (red iron oxide (iron sesquioxide, red iron oxide), yellow iron oxide, yellow sesquioxide, black iron oxide), zinc oxide (zinc flower), zirconium oxide, and oxidation. Examples thereof include titanium, aluminum oxide, magnesium oxide, silica, silicon dioxide, silicon dioxide / alumina composite powder, and silicon dioxide / magnesium composite powder.

Among these powders, improvement of powder permeability, skin texture, and powder retention achieved from the viewpoint of further improving dispersion stability or when starch acrylate, which will be described later, is blended. From the viewpoint of making the powder even more prominent, titanium oxide, silicon dioxide, talc, kaolin, and iron oxide are preferable.

Further, these powders may be subjected to surface treatment to modify the surface characteristics, if necessary.

The average particle size of the powder used in the present invention is not particularly limited as long as it can exert a concealing effect on wrinkles and pores, and examples thereof include 0.1 to 30 μm. From the viewpoint of further improving the permeability of the powder, the average particle size of the powder is preferably 0.1 to 20 μm, more preferably 0.1 to 15 μm, particularly preferably 0.1 to 10 μm, and most preferably 0.1 to 10 μm. Is 0.1 to 5 μm. In the prior art, such powders having an average particle size tended to have inferior powder retention characteristics, but in the external composition of the present invention, even powders having such an average particle size can be used. By blending starch acrylate, which will be described later, it becomes possible to provide excellent powder retention characteristics. The average particle size of the powder is a value (D50) measured by a laser diffraction / scattering method.

In the external composition of the present invention, the powder may be used alone or in combination of two or more, and the type of powder used should be appropriately selected according to the degree of skin texture to be imparted and the like. Just do it.

For example, when iron oxide coexists with a heparinoid, the color tone becomes brighter and the color development property is improved. Therefore, when the external composition of the present invention contains a heparinoid, the iron oxide has a skin texture. It is particularly suitable for further increasing the amount of wrinkles and making wrinkles more inconspicuous.

For example, a powder having a refractive index of 2.0 or less, preferably about 1.3 to 2.0 (hereinafter, may be referred to as a low refractive index powder) penetrates into wrinkles and pores and exhibits a transparent feeling. Since it can give a natural impression, it is preferably used when it is important to give a skin texture excellent in transparency. Specific examples of the powder having a refractive index of about 1.3 to 2.0 include silicon dioxide, talc, and kaolin.

For example, a powder having a refractive index of more than 2.0, preferably about 2.2 to 2.8 (hereinafter, may be referred to as a high refractive index powder) is familiar with the skin color around wrinkles and pores. It is easy to use and can reduce the discomfort of wrinkles and pores in which powder has entered. Therefore, it is preferably used when it is important to reduce the discomfort with the surrounding skin color. Specific examples of the powder having a refractive index of about 2.2 to 2.8 include titanium oxide.

Further, as a preferable aspect of the powder used in the present invention, a combination of a low refractive index powder and a high refractive index powder can be mentioned. By using the low-refractive index powder and the high-refractive index powder in combination, it is possible to realize a skin texture having excellent transparency and less discomfort with the surrounding skin color. When the low refractive index powder and the high refractive index powder are used in combination, the ratio thereof is not particularly limited, but for example, 5 to 300 parts of the high refractive index powder per 100 parts by weight of the low refractive index powder. By weight, preferably 10 to 200 parts by weight, more preferably 10 to 150 parts by weight.

The content of the powder in the external composition of the present invention is not particularly limited, but is, for example, about 1 to 25% by weight, preferably about 1 to 20% by weight, more preferably about 1 to 15% by weight, and particularly preferably about 1 to 15% by weight. Is about 1 to 10% by weight.

Heparinoid The external composition of the present invention contains a heparinoid. In the external composition of the present invention, the heparin-like substance improves the dispersion stability of the powder and makes it possible to suppress sedimentation, aggregation, formation of lumps, and the like. Further, by improving the dispersion stability of the powder, it is possible to make the powder permeability uniform in wrinkles and pores when applied to the skin.

The heparinoid is a polysulfated mucopolysaccharide such as chondroitin polysulfate, and is a known drug known to have a moisturizing effect, an anti-inflammatory effect, a blood circulation promoting effect, and the like.

The origin of the heparinoid used in the present invention is not particularly limited, but for example, those obtained by polysulfating mucopolysaccharides, tissues of edible animals (for example, tracheal cartilage of cattle, pigs, etc.) Examples include those extracted from (lungs containing). In the external composition of the present invention, as the heparinoid, the heparinoid contained in the Japanese Pharmacopoeia non-pharmaceutical standard is preferably used.

The content of the heparinoid in the external composition of the present invention is not particularly limited, but is, for example, 0.1% by weight or more, preferably 0.1 to 1% by weight, more preferably 0.1 to 0%. 5% by weight is mentioned.

Further, in the external composition of the present invention, the ratio of the heparinoid to the powder is not particularly limited, but for example, the amount of the heparinoid is 0.1 part by weight or more, preferably 0 per 100 parts by weight of the powder. .1 to 500 parts by weight, more preferably 0.2 to 300 parts by weight, and particularly preferably 0.2 to 200 parts by weight.

Starch Acrylic Acid The external composition of the present invention may contain starch acrylate, if necessary. In the external composition of the present invention, the powder permeability, the texture of the skin, and the powder retention can be improved by containing the powder and the heparinoid and the starch acrylate, and the excellent hiding effect is maintained. It becomes possible to play the target. Although not limited interpretation is desired, when starch acrylate is contained in the external composition of the present invention, the powder applied to the skin is covered with starch acrylate, so that the surface of the powder is formed. The unevenness of the powder becomes uniform, which enhances the penetration of the powder and makes it possible to improve the texture of the skin by making the light incident on the powder and the light reflected from the powder more uniform. it is conceivable that. Further, it is considered that the wrinkles and pores to which the external composition of the present invention is applied are covered with starch acrylate, and the powder retention property is improved.

Acrylic acid starch is a starch derivative in which starch is chemically modified with acrylic acid. The type of starch acrylate used in the present invention is not particularly limited, and examples thereof include starch acrylate 300, starch acrylate 1000, starch / sodium acrylate graft polymer, and the like. Among these starch acrylates, starch acrylate 300, starch acrylate 1000, and starch acrylate 1000 are more preferable from the viewpoint of further improving powder permeability, skin texture, and powder retention. Can be mentioned.

The type of raw material starch constituting the acrylate starch is not particularly limited, but for example, corn starch, wheat starch, potato starch, tapioca starch, rice starch, sweet potato starch, sago starch, soramame starch, green bean starch, and soybean starch. , Azuki starch and the like.

These starch acrylates may be used alone or in combination of two or more.

As the starch acrylate, one prepared by a known method may be used, or a commercially available product may be used. As a commercially available product of starch acrylate, for example, the starch acrylate 300 has a trade name of "Sunwet IM-300MPS" (manufactured by Sanyo Chemical Industries, Ltd.); the starch acrylate 1000 has a trade name of "Sunwet IM-". 1000 ", trade name" Sun Wet Sun Wet IM-1000MPS "(both manufactured by Sanyo Chemical Industries, Ltd.); as a starch-sodium acrylate graft polymer, trade name" Sun Fresh ST-100MC "(SANYO CHEMICAL INDUSTRIES CO., LTD.) (Made by company), etc.

When starch acrylate is contained in the external composition of the present invention, the content thereof is not particularly limited, and examples thereof include 0.1 to 10% by weight. From the viewpoint of further improving powder permeability, skin texture, and powder retention, the content of starch acrylate in the external composition of the present invention is preferably 0.1 to 5% by weight, more preferably 0.1 to 5% by weight. Is 0.1 to 3% by weight, particularly preferably 0.1 to 2% by weight, and most preferably 0.1 to 1% by weight.

When starch acrylate is contained in the external composition of the present invention, the ratio of starch acrylate to the powder is not particularly limited, but for example, starch acrylate is contained in an amount of 1 to 200 weight per 100 parts by weight of the powder. Parts, preferably 2 to 150 parts by weight, more preferably 5 to 100 parts by weight.

Thickener The external composition of the present invention may contain a thickener in order to impart an appropriate viscosity and enhance the usability.

The type of thickener is not particularly limited as long as it is cosmetically acceptable, and for example, carboxyvinyl polymer, hydroxypropyl methylcellulose, sodium carboxymethylcellulose, ethylcellulose, methylcellulose, sodium alginate, xanthan gum, carrageenan, etc. Polyvinylpyrrolidone and the like can be mentioned. Among these thickeners, a carboxyvinyl polymer is preferably mentioned.

These thickeners may be used alone or in combination of two or more.

When the external composition of the present invention contains a thickener, the content thereof is not particularly limited, but is, for example, 0.1 to 5% by weight, preferably 0.1 to 2% by weight, more preferably 0. .1 to 1% by weight.

Composition for external use of the water present invention, in the state of being dissolved heparinoid, in order to effectively improve the powder dispersion stability, it preferably contains water. When water is contained in the external composition of the present invention, the content thereof is not particularly limited, and examples thereof include 30% by weight or more, preferably 30 to 95% by weight, and more preferably 40 to 95% by weight.

Oil content The external composition of the present invention may contain an oil content in order to improve the usability when applied to the skin.

The type of oil is not particularly limited as long as it is cosmetically acceptable, but for example, olive oil, saflower oil, soybean oil, camellia oil, corn oil, rapeseed oil, sunflower oil, cottonseed oil, peanut oil, etc. Animal and vegetable oils such as lard, squalane, fish oil; mineral oils such as liquid paraffin, paraffin, gelled hydrocarbons, and vaseline; waxes and waxes such as beeswax, carnauba wax, candelilla wax, ceresin, rice wax, and microcrystallin wax; Ester oils such as isopropyl myristate, isopropyl adipate, diethyl sebacate, isopropyl sebacate, isopropyl palmitate, cetyl palmitate, ethyl oleate; stearic acid, oleic acid, palmitic acid, bechenic acid, linoleic acid, lanolin, etc. Fatty acids; fatty acid esters such as cetyl palmitate, isopropyl palmitate, ethyl linoleate; higher alcohols such as stearyl alcohol, cetanol, behenyl alcohol, myristyl alcohol, oleyl alcohol, hexadecyl alcohol, lanolin alcohol; dimethylpolysiloxane, cyclic silicone, etc. Silicone oils; examples include cholesterol, glyceryl tri2-ethylhexanoate, cetyl 2-ethylhexanoate and the like. These oils may be used alone or in combination of two or more.

When the external composition of the present invention contains an oil, the content thereof may be appropriately set according to the formulation form and the like, and examples thereof include 1 to 50% by weight, preferably 5 to 50% by weight. ..

Surfactant Further , the external composition of the present invention may contain a surfactant, if necessary. In particular, when an oil component is added to the external composition of the present invention, it is desirable that a surfactant is contained in order to solubilize or emulsify the oil component.

The surfactant is not particularly limited as long as it is cosmetically acceptable, and any of nonionic surfactant, anionic surfactant, cationic surfactant, and amphoteric surfactant is used. However, a nonionic surfactant is preferable.

Specific examples of the surfactant include POE (10 to 50 mol) phytosterol ether, POE (10 to 50 mol) dihydrocholesterol ether, POE (10 to 50 mol) 2-octyldodecyl ether, and POE (10 to 50 mol). Mol) decyltetradecyl ether, POE (10-50 mol) oleyl ether, POE (2-50 mol) cetyl ether, POE (5-50 mol) behenyl ether, POE (5-30 mol) polyoxypropylene (5-mol) Polyoxyethylene alkyl ethers such as 30 mol) 2-decyltetradecyl ether, POE (10 to 50 mol) polyoxypropylene (2 to 30 mol) cetyl ether, and their phosphates and phosphates (POE cetyl ether phosphoric acid). Sodium, etc.), POE (20-60 mol) sorbitan monoolate, POE (10-60 mol) sorbitan monoisostearate, POE (10-80 mol) glyceryl monoisostearate, POE (10-30 mol) glyceryl mono Steerate, POE (20-100 mol) polyoxypropylene-modified silicone, POE-alkyl-modified silicone, polyethylene glycol monolaurate, polyethylene glycol monopalmitate, polyethylene glycol monostearate, polyethylene glycol dilaurate, polyethylene glycol dipalmitate , Polyethylene glycol distearate, Polyethylene glycol dioleate, Polyethylene glycol diricinoleate, Polyoxyethylene hydrogenated castor oil (5-100), Polysorbate (20-85), Glycerin fatty acid ester (Glycerin monostearate, etc.), Hydrogenated soybean Examples thereof include phospholipids, hydrogenated lanolin alcohol, polyglyceryl fatty acid (polyglyceryl stearate, etc.), and amide conjugates of amino acids and fatty acids (sodium stearoyl glutamate, etc.). These surfactants may be used alone or in combination of two or more.

When the external composition of the present invention contains a surfactant, the content thereof may be appropriately set according to the formulation form and the like, and is, for example, 0.1 to 10% by weight, preferably 0.1. -8% by weight, more preferably 0.1 to 5% by weight.

Other Ingredients In addition to the above-mentioned ingredients, the external composition of the present invention may contain functional ingredients exhibiting cosmetic or pharmaceutical functionality, if necessary. Such functional components are not particularly limited, but are, for example, water-soluble vitamins and derivatives thereof, oil-soluble vitamins and derivatives thereof, glycyrrhizinic acid and derivatives thereof, glycyrrhetinic acid and derivatives thereof, astaxanthin, coenzyme Q10, α. -Glycosaminoglycans such as lipoic acid, ceramide or similar substances, linoleic acid, arbutin, tranexamic acid, kodiic acid, enzymes, peptides, hormones, various cytokines, hyaluronic acid and salts thereof or derivatives thereof, hyaluronic acid hydrolysis Substances, collagen or its hydrolyzate, elastin or its hydrolyzate, physiologically active substances such as sugars, various animal and plant extracts, substances obtained by fermentation by microorganisms, steroids, antihistamine, local anesthetics, anti-inflammatory agents, Examples thereof include antibacterial agents, antibacterial agents, antipruritic agents, skin protectants, blood circulation promoters, sterols and the like. When these functional components are contained, the content thereof may be appropriately set according to the type of the functional component to be used, the expected effect, and the like.

In addition, the external composition of the present invention may contain additives other than the above-mentioned components, if necessary, in order to obtain a desired pharmaceutical form. Such additives are not particularly limited as long as they are cosmetically acceptable, but for example, polyhydric alcohols (ethylene glycol, propylene glycol, isoprene glycol, diethylene glycol, dipropylene glycol, polypropylene glycol, glycerin). Etc.), monohydric lower alcohols (ethanol, propanol, isopropanol, butanol, isobutanol, etc.), refreshing agents (menthol, camphor, borneol, peppermint water, peppermint oil, etc.), preservatives (methylparaben, propylparaben, benzoic acid, etc.) , Sodium benzoate, sorbic acid, etc.), flavoring agents (citral, 1,8-cionale, citronellal, farnesol, etc.), colorants (tar pigments (brown 201, blue 201, yellow 4, yellow 403, etc.) ), Cacao pigment, chlorophyll, aluminum oxide, etc.), pH adjuster (phosphoric acid, hydrochloric acid, citric acid, sodium citrate, succinic acid, tartaric acid, sodium hydroxide, potassium hydroxide, triethanolamine, triisopropanolamine, etc.) , Wetting agent (dl-pyrrolidone sodium carboxylate solution, D-sorbitol solution, macrogol, etc.), stabilizer (dibutylhydroxytoluene, butylhydroxyanisole, sodium edetate, sodium metaphosphate, L-arginine, L-aspargonic acid) , DL-alanine, glycine, sodium erythorbate, propyl gallate, sodium sulfite, sulfur dioxide, chlorophosphoric acid, catechin, rosemary extract, etc.), antioxidants, UV absorbers, chelating agents, adhesives, buffers, Additives such as solubilizers, solubilizers and preservatives can be mentioned.

Formulation Form / Use The external composition of the present invention is used as a transdermally applied preparation (cosmetics, external pharmaceuticals (including quasi-drugs), etc.).

The dosage form of the external composition of the present invention is not particularly limited and may be liquid (suspension, emulsion, etc.), semi-solid (cream, ointment, gel, etc.), or solid. However, liquid and semi-solid forms are preferable.

The formulation form of the external composition of the present invention is not particularly limited as long as it can be applied transdermally, and for example, make-up cosmetics (foundation, concealer, teak, etc.), creams, lotions, beauty liquids, etc. Cosmetics such as emulsions, gels, lipsticks and foundations; external preparations such as liquids (including lotions, sprays, aerosols and emulsions), foams, ointments, creams and gels. Among these pharmaceutical forms, cosmetics are preferable, and creams, lotions, beauty essences, milky lotions, gels and the like are more preferable.

The external composition of the present invention is used for wrinkle and / or pore concealment (wrinkle concealment and / or pore concealment) application. The site to which the external composition of the present invention is applied is not particularly limited as long as it is a site where wrinkles occur and / or a site where pores are conspicuous. For example, the face, neck, hands, arms, and feet. And so on.

Hereinafter, the present invention will be described in more detail with reference to Examples and the like, but the present invention is not limited thereto.

In the following examples, comparative examples, and formulation examples, starch acrylate 1000 has a trade name of "Sunwet Sunwet IM-1000MPS" (manufactured by Sanyo Chemical Industries, Ltd.), and starch acrylate 300 has a trade name of "Sunwet". "IM-300MPS" (manufactured by Sanyo Chemical Industries, Ltd.) and starch-sodium acrylate graft polymer used the trade name "Sunfresh ST-100MC" (manufactured by Sanyo Chemical Industries, Ltd.).

Test Example 1
1. 1. Preparation of External Composition (Suspension) An external composition (suspension) having the composition shown in Table 1 was prepared. Specifically, first, a heparinoid and starch acrylate 1000 were added to purified water and dissolved. Then, each powder shown in Table 1 was added and mixed to obtain an external composition (suspension).

2. Evaluation Method of Dispersion Stability After the prepared external composition was allowed to stand at room temperature for 5 minutes, the dispersion stability of the powder was evaluated by observing the appearance. Dispersion stability was determined according to the following criteria.

◯: The powder is uniformly dispersed.
Δ: The powder has settled and a part of the liquid has become transparent.
X: All the powder settles to the bottom, and almost all of the liquid except the part where the powder has settled becomes transparent.

3. 3. Evaluation Results Table 1 shows the results obtained. Further, FIG. 1 shows a photograph of the external compositions of Example 7 and Comparative Example 5 observed after being allowed to stand for 5 minutes. When only the powder was contained, sedimentation of the powder was observed, and the dispersion stability of the powder was poor (Comparative Examples 1 to 5). On the other hand, when the heparin-like substance was contained together with the powder and starch acrylate, the powder did not settle and the dispersion stability of the powder was significantly improved (Examples 1 to 7).

Further, in Examples 4 and 5 containing iron oxide as a powder together with the heparinoid, the color tone was brighter and the color development was improved as compared with Comparative Examples 3 and 4 not containing the heparinoid. That is, from this result, it was also confirmed that the external composition containing a heparinoid and iron oxide is particularly suitable for making wrinkles inconspicuous.

Test Example 2
1. 1. Preparation of External Composition (Emulsified Composition) An external composition (emulsified composition) having the composition shown in Table 2 was prepared. Specifically, the carboxyvinyl polymer was mixed with an appropriate amount of purified water and stirred to obtain an aqueous phase fraction 1. Separately, the components shown in column C of Table 2 were heated and dissolved at 80 ° C. to obtain an oil phase fraction. Further, a heparinoid was mixed with an appropriate amount of purified water and stirred to obtain an aqueous phase fraction 2. After mixing the powder shown in column B of Table 2 and the aqueous phase fraction 2 with the aqueous phase fraction 1, the oil phase fraction was added, and emulsification treatment was performed with a homomixer to emulsify. Then, by adding phosphoric acid, an external composition (creamy composition) having a pH of 5.0 was obtained.

2. Evaluation method of dispersion stability The dispersibility stability of the powder was evaluated by observing the appearance of the external composition after preparation. Dispersion stability was determined according to the following criteria.

◯: The powder is uniformly dispersed.
X: The powder is not uniformly dispersed and lumps are generated.

3. 3. Evaluation Results Table 2 shows the results obtained. When heparinoids were contained together with the powder, the powder could be uniformly dispersed without causing lumps (Examples 8 to 11). It was also confirmed that in Example 11 containing iron oxide as a powder together with starch acrylate and a heparinoid, the color tone was brightened and the color development was improved, which was particularly suitable for making wrinkles inconspicuous. Was done.

Test Example 3
1. 1. Preparation of External Composition (Emulsified Composition) An external composition (emulsified composition) having the composition shown in Table 3 was prepared. Specifically, the carboxyvinyl polymer was mixed with an appropriate amount of purified water and stirred to obtain an aqueous phase fraction 1. Further, the components shown in column D of Table 1 were heated and dissolved at 80 ° C. to obtain an oil phase fraction. Further, starch 1000 acrylate was mixed with an appropriate amount of purified water and stirred to obtain an aqueous phase fraction 2. After mixing the powder shown in column C of Table 1 and the aqueous phase fraction 2 with the aqueous phase fraction 1, the oil phase fraction was added, and emulsification treatment was performed with a homomixer to emulsify. Then, by adding phosphoric acid, an external composition (creamy emulsified composition) having a pH of 5.0 was obtained.

2. Evaluation Method of Dispersion Stability The dispersion stability of the powder was evaluated by the same method as in Test Example 2 above.

3. 3. Evaluation Method of Wrinkle Concealing Effect Using each of the obtained external compositions, powder permeability, skin texture, and powder retention were evaluated in order to confirm the wrinkle concealing effect. The specific evaluation method is as shown below.

[Powder permeability]
For 10 monitors who were worried about wrinkles on the back of their hands, it was evaluated whether or not the wrinkles on the coated portion could be filled by applying the external composition. Specifically, 0.3 g of the external composition was applied to the back of the hand, allowed to acclimatize for 1 minute, and then visually observed to evaluate whether the wrinkles could be filled with the powder. The number of people who felt that the wrinkles were completely filled was counted, and the powder permeability was judged according to the following criteria.
◎: 8 to 10 people ○: 5 to 7 people △: 2 to 4 people ×: 0 to 1 people

[Skin texture]
For 10 monitors who were worried about wrinkles on the back of their hands, it was evaluated whether or not the wrinkles on the applied portion were visually similar to the original skin part by applying the external composition. Specifically, 0.3 g of the external composition is applied to the back of the hand, allowed to acclimatize for 1 minute, and then visually observed. It was evaluated whether the wrinkles became less noticeable. The number of people who felt that the wrinkles became visually similar to the original skin part and the wrinkles became less noticeable was counted, and the skin texture was judged according to the following criteria.
◎: 8 to 10 people ○: 5 to 7 people △: 2 to 4 people ×: 0 to 1 people

[Powder retention]
Ten monitors who were worried about wrinkles on the back of their hands were evaluated to see if the applied external composition was difficult to remove. Specifically, 0.3 g of the external composition was applied to the back of the hand, allowed to acclimatize for 1 minute, and then washed with running water while stroking with bare hands three times to evaluate whether the external composition was difficult to remove from the wrinkled part of the hand. .. The number of people who felt that the external composition was difficult to remove from the wrinkled part of the hand was counted, and the powder retention was judged according to the following criteria.
○: 7 to 10 people △: 3 to 6 people ×: 0 to 2 people

4. Evaluation Results Table 3 shows the results obtained. Similar to the result of Test Example 2, when the powder and the heparinoid were contained, the powder could be uniformly dispersed without causing lumps (Examples 12 to 24).

Further, in the case of powder alone, although the powder permeability was good, it was insufficient in terms of skin texture and powder retention (Comparative Example 7). On the other hand, when the powder and starch acrylate were used in combination, the powder permeability, the texture of the skin, and the powder retention were good, and the wrinkle concealing effect was excellent (Example 12). ~ 24). It was also confirmed that any powder having an average particle size of 0.6 to 16 μm has good powder permeability, skin texture, and powder retention when used in combination with starch acrylate. Further, as is clear from the comparison between Examples 15 and 24, starch acrylate not only contributes to the improvement of skin texture and powder retention, but also has the effect of improving powder permeability. It was also confirmed that it was done.

Comparing Examples 13 and 14, many people felt that Example 14 had a better skin texture, and among the Examples in which the evaluation result of the skin texture was ○, Examples 22 and 23 were shown. , The number of people who felt that wrinkles became less noticeable was 7, which was the largest number. From this result, as a powder, a powder having a refractive index of about 2.2 to 2.8 (titanium oxide) and a powder having a refractive index of about 1.3 to 2.0 (silicon dioxide) are used in combination. , It became clear that even more excellent skin texture can be expressed.

Formulation Examples External compositions (emulsified compositions) having the compositions shown in Tables 4 to 6 were prepared. Specifically, the carboxyvinyl polymer was mixed with an appropriate amount of purified water and stirred to obtain an aqueous phase fraction 1. Separately, the components shown in columns C of Tables 4 to 6 were heated and dissolved at 80 ° C. to obtain an oil phase fraction. Further, the components shown in columns A of Tables 4 to 6 were mixed with an appropriate amount of purified water and stirred to obtain an aqueous phase fraction 2. After mixing the powders shown in columns B of Tables 4 to 6 and the aqueous phase fraction 2 into the aqueous phase fraction 1, the oil phase fraction was added and emulsified by a homomixer to emulsify. Then, by adding phosphoric acid, an external composition (creamy emulsified composition) having a pH of 5.0 was obtained. When the dispersion stability of the powder was evaluated for the obtained external composition by the same method as in Test Example 2, uniform dispersion of the powder was confirmed in each case. Further, when the wrinkle concealing effect was evaluated by the same method as in Test Example 3, all the external compositions had good powder penetration, skin texture, and powder retention, and were excellent in wrinkle concealment. It had an effect.

Claims (3)

An external composition used for concealing wrinkles and / or pores, which contains a powder, a heparin-like substance , and starch acrylate, and has a refractive index of 1.3 to 2.0 as the powder. powder and refractive index seen contains a powder of 2.2 to 2.8, wherein the aqueous or oil-in-water emulsion composition, the composition for external use (where the refractive index from 1.40 to 1. Except when the surface of the spherical powder having a refractive index of 60 contains a spherical composite powder which is a spherical powder in which a coating component having a refractive index of 2.00 to 2.90 is coated). The external composition according to claim 1, wherein the powder has an average particle size of 0.1 to 30 μm. The external composition according to claim 1 or 2 , which contains iron oxide as the powder.

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