JPH0987128A - Capsule having sebum absorptivity and dermal preparation for external use containing the same capsule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stabilized capsule, capable of preventing a sebum absorptivity of a polymer having the sebum absorptivity from deteriorating and good in touch especially as a cosmetic by coating a volatile liquid oily ingredient with the polymer and a specific ingredient. SOLUTION: This capsule having the sebum absorptivity is obtained by including a volatile liquid oily ingredient in a polymer ingredient having the sebum absorptivity and coating the periphery thereof with a solid oily ingredient. The temperature at which the solid oily ingredient starts melting is preferably 30-100 deg.C and higher than a temperature at which the volatile liquid oily ingredient starts solidifying. The weight ratio of the volatile liquid oily ingredient to the polymer ingredient is 0.5-10. The solid oily ingredient is higher fatty acids, animal or vegetable oils, hydrocarbons, esters, silicones, higher alcohols, coloring matters, etc. The volatile liquid oily ingredient is the higher fatty acids, animal or vegetable oils, hydrocarbons, esters, silicones, etc. The resultant capsule is blended to afford the dermal preparation for external use having the sebum absorptivity. A suppressant for sebum secretion such as Aloe or Zizyphi Inermi Fructus is preferably blended in the dermal preparation for external use.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a capsule having sebum absorbing ability and a skin external preparation containing the capsule, which is useful in the fields of cosmetics, pharmaceuticals and the like.

[0002]

2. Description of the Related Art Cosmetics, pharmaceuticals, quasi-drugs, etc. are generally called external preparations. Of these, the function and purpose of sebum secretion-suppressing cosmetics is to provide an appropriate amount of oil and moisturizing ingredients, moisture, etc. according to the skin and hair types to help the natural skin and hair moisturizing mechanism, To reduce the burden on the skin and hair caused by changes in environmental conditions, such as those that depend on nature such as temperature and humidity, or artificial things such as degreasing due to washing, and to maintain a healthy and normal state. . Therefore, as such cosmetics, creams and emulsions containing various sebum secretion inhibiting components, or cosmetics containing a polymer having sebum absorption ability dispersed therein are widely used.

[0003]

However, cosmetics containing various sebum secretion-inhibiting ingredients have poor fast-acting properties, and in particular, under the conditions where the temperature exceeds 30 ° C. in summer, sebum secretion can be sufficiently suppressed. In some cases, problems such as dullness of makeup and shine were caused.

When a polymer having sebum absorbing ability is contained in cosmetics, the polymer absorbs the oily component in the external preparation, and the sebum absorbing ability is inevitably lowered. When a volatile oily component is used in a usual external preparation,
Since the outer layer of the component was only covered with the surfactant, its stability was significantly reduced.

Further, when a polymer having a sebum absorbing ability is contained and a small amount of a volatile oily component in the external preparation is used, the feel of water and the polymer becomes strong, and the feeling as an external preparation is unsatisfactory. There is a problem that it becomes appropriate and gives discomfort.

Therefore, an object of the present invention is to provide a capsule having high sebum absorption ability and excellent stability without impairing the feel as a cosmetic, and a skin external preparation containing the capsule.

[0007]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have made a polymer adsorb a volatile liquid oily component and coat the outer layer thereof with a solid oily component. By encapsulating by, it was found that the sebum absorption ability of the polymer having sebum absorption ability is prevented from lowering, and that a stable capsule having a good feel as an external preparation, particularly a cosmetic, can be obtained, and the present invention It came to completion. That is, the present invention is as follows.

(1) A capsule having sebum absorbing ability, characterized in that the periphery of a polymer component containing a volatile liquid oily component is coated with a solid oily component. (2) The temperature at which the solid oily component begins to melt is 30 to
The capsule according to (1), which has a temperature of 100 ° C. and is higher than the temperature at which the volatile liquid oily component begins to solidify. (3) The capsule according to (1) or (2), wherein the temperature at which the volatile liquid oily component begins to vaporize is higher than the temperature at which the solid oily component begins to vaporize. (4) The weight ratio of the volatile liquid oily component to the polymer component is 0.5 to 10 (1) to
The capsule according to any one of (3). (5) One or two selected from the group consisting of higher fatty acids, animal and vegetable oils, hydrocarbons, esters, silicones, higher alcohols, pigments, plant extracts, and ultraviolet absorbers as the solid oil component. (1) which is more than one species
~ The capsule according to any one of (4). (6) The volatile liquid oil component is one or more selected from higher fatty acids, animal and vegetable oils, hydrocarbons, esters, silicones, higher alcohols, pigments, plant extracts, and ultraviolet absorbers. The above (1) to (5)
The capsule according to any one of the above. (7) A skin external preparation having sebum absorbing ability, containing the capsule according to any one of (1) to (6). (8) The external preparation for skin according to (7) above, which contains a sebum secretion inhibitor. (9) As the sebum secretion inhibitor, one kind or two or more kinds selected from the group consisting of extracts of aloe, tern, dioxin, hypericum, quince, hamamelis, horse chestnut, hop, kiwi is blended (8) ) The external preparation for skin described above.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The capsule in the present invention does not mean a liquid component or the like which is usually used in cosmetics but coated with gelatin or the like, but a polymer containing a volatile liquid oily component as described above. It means that the components are coated with a solid oily component.

The volatile liquid oily component used in the present invention may be any as long as the mixture of one or more oily components is liquid and volatile at room temperature, solid oily As the component, any component may be used as long as the mixture obtained by mixing one or more oily components is solid at room temperature.

Specifically, these oily components are one or more selected from higher fatty acids, hydrocarbons, esters, silicones, higher alcohols, animal and vegetable oils, pigments, plant extracts and ultraviolet absorbers. Two or more kinds can be mentioned, and if they are specifically exemplified, they are as follows.

The higher fatty acids include capric acid, lauric acid, myristic acid, palmitic acid, stearic acid,
Examples thereof include behenic acid, 12-hydroxystearic acid, linoleic acid, oleic acid, linoleic acid, arachidonic acid and eicosapentaenoic acid.

Examples of hydrocarbons include liquid paraffin, ozokerite, pristane, ceresin, vaseline, microcrystalline wax and the like.

Examples of the esters include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate,
Cetyl lactate, myristyl lactate, lanolin lactate, isocetyl stearate, isocetyl isostearate, 12-
Cholesteryl hydroxystearate, ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, tri 2-Ethylhexyl trimethylolpropane, trimethylolpropane triisostearate, penta-2-erythrhexyl pentane erythritol, tri-2-ethylhexyl glycerin, 2
-Cetyl ethylhexylate, 2-ethylhexyl palmitate, glyceryl trimyristate, glyceryl trioctanoate, glyceryl triisopalmitate, castor oil fatty acid methyl ester, oleyl oleate, 2-heptylundecyl palmitate, diisobutyl adipate, Di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, palmitate-2-
Hexyldecyl, diisopropyl sebacate and the like can be mentioned.

Examples of silicones include dimethylpolysiloxane, methylphenylpolysiloxane, dimethylsiloxane / methylstearoxysiloxane copolymer, trimethylsiloxysilicic acid, decamethylcyclopentasiloxane, methylpolysiloxane, highly polymerized methylpolysiloxane, dodeca. Examples thereof include methylcyclohexasiloxane and octamethylcyclotetrasiloxane.

The higher alcohols include capryl alcohol, lauryl alcohol, myristyl alcohol,
Cetyl alcohol, stearyl alcohol, aralkyl alcohol, behenyl alcohol, oleyl alcohol,
Cetostearyl alcohol, monostearyl glyceryl ether (batyl alcohol), 2-decyltetradecanol, 2-hexyldecanol, 2-hexyldecanol, 2-octyldodecanol, lanolin alcohol, cholesterol, phytosterol, isostearyl alcohol and the like can be mentioned. .

As the animal and vegetable oil, avocado oil, camellia oil, macadamia nut oil, corn oil, olive oil,
Evening primrose oil, rapeseed oil, egg yolk oil, sesame oil, persic oil,
Wheat germ oil, southern oil, castor oil, hydrogenated castor oil, linseed oil, safflower oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, rice bran oil, cinnamon oil, jojoba oil, germ oil, almond oil, cocoa butter , Coconut oil, horse fat, hardened coconut oil, turtle oil, mink oil, squalene, squalane, orange laffy oil, beef tallow, sheep fat, pork fat, mokuro, whale fat, lanolin, lanolin alcohol, hydrogenated lanolin, lanolin acetate, Liquid lanolin, lanolin fatty acid isopropyl, lanolin fatty acid isostearyl, lanolin fatty acid cholesteryl, reduced lanolin, jojoba wax, hard lanolin, shellac wax, jojoba alcohol and the like can be mentioned.

As the dyes, Red No. 225 and Red 21
No. 8, Daidai 201, Green 202, Purple 201
Oil-soluble dyes such as No. 5, mica titanium, red iron oxide mica titanium, yellow iron oxide treated mica titanium, black iron oxide treated mica titanium, iron oxide / yellow iron oxide treated mica titanium, iron oxide / black iron oxide treated mica titanium, conju Examples include pearl pigments such as treated mica titanium and carmine treated mica titanium.

Examples of the ultraviolet absorber include 2-ethylhexyl paramethoxycinnamate, benzophenone, 2-hydroxy-4-methoxybenzophenone, 2-ethylhexyl paradimethylaminobenzoate, and 4- (3,4-dimethoxyphenylmethylene)-. 2,5-dioxoimidazolidine-1-propionic acid 2-ethylhexyl ester,
2,4,6-trianilino-P- (carbo-2'-ethylhexyl-1-oxy) 1,3,5-triazine, 4
Examples include -tert-butyl-4′-methoxy-benzoylmethane and furanone derivatives.

The volatile oil component in the volatile liquid oil component is preferably a volatile silicone or a lower alcohol such as ethanol or isopropanol, more preferably 2 cs or less dimethyl silicone, octamethylcyclotetrasiloxane, decamethylcyclopenta. Examples include siloxane, dodecamethylcyclohexasiloxane, and methylcyclopolysiloxane.

In the case of using the above-mentioned oily component, when the mixture becomes liquid and volatile by mixing even a single product in solid form, the mixture can be used as a volatile liquid oily component, Further, when the mixture becomes a solid by mixing even a single product in a liquid state, the mixture can be used as a solid oil component.

The solid oily component used in the present invention preferably has a temperature at which the solid oily component begins to solidify at 30 to 100 ° C. The temperature at which the solid oily component begins to melt is 30
When the temperature is lower than 0 ° C, the solid oily component starts to melt at room temperature, and the solid oily component cannot be covered around the polymer component containing the volatile liquid oily component, so that the stability of the product cannot be maintained. On the other hand, when the temperature at which the solid oily component begins to melt is higher than 100 ° C., the solid oily component does not melt on the skin at room temperature and is not suitable as a product.

The temperature at which the solid oily component begins to melt is preferably higher than the temperature at which the volatile liquid oily component used in the present invention begins to solidify. If the temperature at which the solid oil component begins to melt is lower than the temperature at which the volatile liquid oil component begins to solidify, that is, the temperature at which it begins to melt, it becomes difficult to cover the volatile liquid oil component with the solid oil component, making encapsulation difficult. Becomes

Further, it is preferable that the temperature at which the volatile liquid oily component begins to vaporize is higher than the temperature at which the solid oily component begins to vaporize. When the temperature at which the solid oily component begins to vaporize is higher than the temperature at which the volatile liquid oily component begins to vaporize, it becomes difficult to cover the volatile liquid oily component with the solid oily component, and again encapsulation becomes difficult.

The polymer component used in the present invention is not particularly limited, and may be any polymer compound capable of adsorbing and containing a volatile liquid oily component, such as nylon 6 and nylon 6. 6, nylon 12, butyl acrylate / methacrylic acid copolymer, octyl acrylate / vinyl acetate copolymer, methyl acrylate / ethyl acrylate copolymer, methyl acrylate /
Styrene copolymer, lauryl acrylate / vinyl acetate copolymer, vinyl acetate / styrene copolymer, styrene / methacrylic acid copolymer, vinylpyrrolidone / vinyl acetate copolymer, polyacrylic acid amide, polymethyl acrylate, Polyethylmethacrylate, polymethylmethacrylate, methacrylic acid / methylmethacrylate copolymer and the like can be used. Of these, nylon 6, nylon 6.6, from the viewpoint of adsorption of the volatile liquid oily components,
Nylon 12 is preferred.

In the present invention, the weight ratio of the volatile liquid oily component to the polymer component is 0.5-10.
It is preferred that When the weight ratio of the volatile liquid oily component to the polymer component is less than 0.5, the polymer component and the solid oily component covering the periphery have a strong feel and are not suitable as an external preparation for skin. On the other hand, the weight ratio is 1
If it exceeds 0, the volatile liquid oily component cannot be sufficiently exerted, and the feel of the volatile liquid oily component is too strong, or sebum is similar to when water comes out from a sponge containing a large amount of water. It also becomes unsuitable as an external preparation for the skin due to a decrease in absorption capacity.

The capsules of the present invention can be stably stored for a long period of time, and the external preparation for skin of the present invention containing such capsules imparts lubricity and wettability to the skin, and also has a feeling of use and sebum absorbing ability. It has the effect of improving the efficacy and effect of the polymer component having.

The external preparation for skin of the present invention is one that acts directly or indirectly on the skin, and its method includes application, spraying, etc., regardless of usage, cosmetics,
It includes all medicines and quasi drugs. All of the external preparations for skin of the present invention have the effects originally possessed by the capsules of the present invention described above, but particularly excellent effects in cosmetics.

The mixing ratio of the capsule of the present invention to the total skin external preparation composition is preferably 0.01 to 50% by weight, particularly preferably 0.5 to 50% by weight, although it varies depending on the size of the capsule and the use. It is 10% by weight.

If desired, a sebum secretion inhibitor and an oil-soluble active ingredient can be added to the external preparation for skin of the present invention and can be added anywhere in the capsule or external preparation as long as the dosage form is not impaired. is there.

Specific examples of the sebum secretion inhibitor include Oxendolone, 17α-Methyl-B-nortestosterone, 17α-Methyl-B-nortestosterone, Chlormadinone acetate, Cyproterone acetate, Mention may be made of anti-androgens such as Spironolactone.

Alternatively, there may be mentioned herbal medicines or plant extracts such as aloe, turmeric, dioxin, hypericum, quince, hamamelis, horse chestnut, hop and kiwi. The method for preparing these extracts is not particularly limited. However, as a preferred method for extracting a crude drug or a plant, first, a mixture obtained by appropriately cutting or crushing the above-mentioned crude drug or a plant is used alone or in a mixture of two or more kinds with various suitable solvents at room temperature to room temperature. A method of extracting at a temperature can be mentioned, and the extraction solvent used for this includes:
Water; lower alcohols (including hydrous) such as methyl alcohol and ethyl alcohol; polyhydric alcohols such as glycerin, propylene glycol, 1,3-butylene glycol; lower alkyl esters such as ethyl acetate; benzene,
Hydrocarbons such as hexane; ethers such as diethyl ether are exemplified, and one kind or two or more kinds thereof can be used. Among these, it is preferable to use water or a water-soluble solvent, particularly one, or a mixed solvent of two or more of water, ethyl alcohol, glycerin, and 1,3-butylene glycol. As the extraction conditions, the above-mentioned extraction solvent is added to the crude drug or plant in an amount of about 2 to 150 times, preferably 5 to 30 times, and heated at room temperature or for several hours to several days, particularly at room temperature for one day. As described above, if heating is performed, it is preferable to perform extraction while appropriately stirring for 1 hour or more.

By adding these sebum secretion inhibitors to the capsules of the present invention and / or to the external preparation containing the capsules, the sebum secretion inhibitors can be used more than when used alone.
The inhibitory effect on sebum secretion is further enhanced by the synergistic effect.

Next, specific examples of the oil-soluble active ingredient are:
Tocopherol, tocopherol acetate, vitamin A, vitamin A derivative, ergocalciferol, oil-soluble arnica extract, oil-soluble sardine extract, oil-soluble chamomile extract, oil-soluble licorice extract, oil-soluble mulberry extract, oil-soluble burdock extract, oil-soluble collagen extract, Oil-soluble salvia extract, oil-soluble shikon extract, oil-soluble shinano extract, oil-soluble birch extract, oil-soluble horse mackerel extract, oil-soluble yarrow extract, oil-soluble sage extract,
Oil-soluble euglena extract, oil-soluble touki extract, oil-soluble quince extract, oil-soluble carrot extract, oil-soluble nobara extract, oil-soluble loquat leaf extract, oil-soluble placenta extract, oil-soluble hop extract, oil-soluble horse chestnut extract, oil-soluble peach leaf extract , Oil-soluble yokinin extract, oil-soluble rosemary extract, oil-soluble royal jelly extract,
Cholesterol, a cholesterol derivative, etc. can be mentioned.

[0035]

EXAMPLES Next, the present invention will be described more specifically by way of examples. Examples 1 and 2, Comparative Example 1 Capsules A of the present invention were prepared as follows according to the following formulation. [Volatile liquid oily component] (parts by weight) Liquid paraffin 5.00 Squalane 4.50 Octamethylcyclotetrasiloxane 39.80 Tocopherol acetate 0.50 Perfume 0.20 [Polymer component] Nylon 6 30.00 [Solid state Oily component] Ceresin 10.00 Cetanol 5.00 Cholesteryl hydroxystearate 4.85 Propyl paraoxybenzoate 0.10 Butyl paraoxybenzoate 0.05 Total 100.00

According to the above-mentioned formulation, first, the liquid oily component uniformly mixed with the aqueous solution was added, and the mixture was stirred with a propeller stirrer at 500 rpm. While continuing stirring, the polymer component was added, the solid oily component uniformly dissolved was added, and the mixture was vigorously stirred to obtain a capsule A having an average particle diameter of 1 mm. The temperature at which the volatile liquid oily component begins to solidify in this capsule A is 1.8 ° C, and the temperature at which the solid oily component begins to melt is 63.0 ° C.

Next, according to the following formulation, the cosmetic gel was prepared by heating at 80 ° C. and uniformly dissolving it. (Parts by weight) Carboxy vinyl polymer 0.60 Methyl paraoxybenzoate 0.20 1,3-Butylene glycol 10.00 Triethanolamine 0.60 Purified water Amount meter 100.00

Further, according to the following formulation, the cosmetic gel was prepared by heating at 80 ° C. and uniformly dissolving it. (Parts by weight) Carboxy vinyl polymer 0.60 Methyl paraoxybenzoate 0.20 1,3-Butylene glycol 10.00 Triethanolamine 0.60 Diou extract 5.00 Purified water Qty 100.00

The obtained capsule A and cosmetic gel were mixed at a ratio of 10:90 (weight ratio) to give a skin external preparation of Example 1.

Further, the capsule A thus obtained and the cosmetic gel were mixed in a ratio of 10:90 (weight ratio), and the mixture of Example 2 was used.
It was used as a skin external preparation.

Further, the cosmetic gel was used as it was to prepare a skin external preparation of Comparative Example 1.

Regarding the stability of the external preparations for skin of Examples 1 and 2 and Comparative Example 1, the following sebum secretion inhibition test was conducted. Sebum secretion suppression test For each external preparation for skin, the sebum secretion suppressing effect was measured at 30 ° C with a sebum secretion measuring device (SKICOS). The evaluation results are shown as the sebum secretion suppression rate (inhibition rate) for the non-coated part after a predetermined time. The results obtained are shown in Table 1 below.

[0043]

[Table 1]

As is clear from Table 1, the external preparations for skin of Examples 1 and 2 have a fast-acting immediate effect and a long-lasting effect on the sebum secretion inhibitory effect. In addition, in the external preparation for skin of Example 2, a synergistic effect between the capsule and the crude herb extract is observed.

Example 3, Comparative Examples 2 to 4 Capsules B of the present invention were prepared as follows according to the following formulation. [Liquid oil component] (parts by weight) Jojoba oil 3.00 Vitamin A palmitate 0.10 Olive oil 3.00 Octamethylcyclotetrasiloxane 30.00 Cetanol 0.50 Macadamia nut oil 2.00 Vitamin D3 0.30 [Polymer component] ] Nylon 12 20.00 [Solid oily component] Paraffin 15.00 Ceresin 8.00 Behenyl alcohol 6.00 Isopropyl myristate 2.00 Stearic acid 6.00 Tocopherol acetate 0.50 Oil-soluble placenta extract 0.50 Paraoxybenzoic acid Propyl 0.10 Butyl paraoxybenzoate 0.05 Cholesteryl hydroxystearate 2.95 Total 100.00

According to the above formulation, first, the liquid oily component uniformly mixed with the aqueous solution was added, and the mixture was stirred with a propeller stirrer at 800 rpm. While continuing stirring, the polymer component was added, the solid oily component uniformly dissolved was added, and the mixture was vigorously stirred to obtain a capsule B having an average particle diameter of 500 μm. The temperature at which the volatile liquid oily component in the capsule B begins to solidify is 1.8.
The temperature at which the solid oily component begins to melt is 72.0
° C.

Next, 8 parts of the oil phase and the water phase of the following formulation are combined.
An emulsion was prepared by uniformly dissolving and mixing at 0 ° C. [Oil phase] (parts by weight) Stearic acid 3.00 Stearyl alcohol 1.00 Hardened oil 5.00 Liquid paraffin 7.00 Sunflower oil 3.00 Avocado oil 2.00 POE (20) sorbitan monolaurate 1.00 Self-emulsifying Type Glycerin monostearate 0.50 Phenoxyethanol 0.10 Propyl paraoxybenzoate 0.20 [Aqueous phase] 1,3-butylene glycol 5.00 Methyl paraoxybenzoate 0.20 Disodium edetate 1.00 Purified water Qualified amount 100.00

The obtained capsule B and the emulsion were mixed with each other at 30:
The mixture was mixed at a ratio of 70 (weight ratio) to obtain the skin external preparation of Example 3 (milky lotion containing capsules).

Comparative sag In the following formulation, oil phase A and oil phase B were mixed and dissolved, and then the dissolved aqueous phase and polymer were added and mixed to prepare comparative examples 2 and 4, respectively. The external preparations for skin of Comparative Examples 3 and 4 were used.

Comparative Example 2 Comparative Example 3 Comparative Example 4 [Oil phase A] (parts by weight) (parts by weight) (parts by weight) Jojoba oil 0.90 0.10 0.10 Vitamin A parmylate 0.03 0.01 0 .01 Olive oil 0.90 0.10 0.10 Octamethylcyclotetrasiloxane 9.00 2.00 0.90 Cetanol 0.15 0.15 0.15 Macadamia nut oil 0.60 0.60 0.60 Vitamin D3 0.09 0.09 0.09 Paraffin 4.50 1.00 0.45 Ceresin 2.40 0.50 0.29 Behenyl alcohol 1.80 0.40 0.18 Isopropyl mysterate 0.60 0.0. 60 0.06 Stearic acid 1.80 1.80 0.18 Tocopherol acetate 0.15 0.15 0.15 Oil-soluble placenta extract 0.15 .15 0.01 Propyl paraoxybenzoate 0.03 0.03 0.03 Butyl paraoxybenzoate 0.015 0.0015 0.015 Cholesteryl hydroxystearate 0.885 0.885 0.09 [Oil phase B] stearin Acid 2.10 4.20 0.21 Stearyl alcohol 0.70 1.40 0.07 Hardened oil 3.50 7.00 0.35 Liquid paraffin 4.90 10.52 0.50 Sunflower oil 2.10 4. 20 0.21 Avocado oil 1.40 2.80 0.14 Monolauric acid POE (20) sorbitan 0.70 0.70 0.50 Self-emulsifying type monostearate glycerin 0.35 0.35 0.30 Phenoxyethanol 0.1. 07 0.07 0.07 propyl paraoxybenzoate 0.14 0.14 0.14 Polymer] Nylon 12 6.00 6.00 6.00 [Aqueous phase] 1,3-butylene glycol 3.50 3.50 3.50 Methyl paraoxybenzoate 0.14 0.14 0.14 Disodium edetate 0.35 0.35 0.35 Purified water proper amount proper amount proper amount meter 100.00 100.00 100.00

The skin external preparations of Example 3 and Comparative Examples 2 and 3 were subjected to the measurement of the rate of weight change over time, and the sebum secretion inhibition test and the touch test similar to those of Example 1. The measurement of the rate of weight change over time and the feel test were carried out as follows. The obtained results are shown in Tables 2 to 4 below.

Measurement of Weight Change with Time For each external preparation for skin , the weight change with time in a thermostatic chamber at 50 ° C. was measured with the initial weight being 100%.

Feeling test : As a feeling , "moist feeling", "wateriness upon application",
"Squeaky feeling", "powderiness after application" and "stickiness" were evaluated. Very good is indicated by ⊚, good is indicated by ◯, and bad is indicated by x.

[0054]

[Table 2]

[0055]

[Table 3]

[0056]

[Table 4]

As is clear from Table 2, in Comparative Example 2 in which the volatile liquid oily component was used in a larger amount than in Comparative Example, the weight change was extremely unstable. In Example 3 in which the composition was encapsulated, there was almost no change in weight.

Further, as is clear from Table 3, it can be seen that the effect of suppressing sebum secretion is large in Example 3 in the form of capsules. It is considered that this is because, in the usual external preparation, the oil-absorbing polymer supplied only the non-volatile oil component because the volatile oil component was volatilized.

Further, as is clear from Table 4, in Comparative Example 4, the oily component was smaller than that of the other Comparative Examples in order to impart stability, and therefore, a little wateriness appeared at the time of application. The result was that the moist feeling was insufficient and only the powdery nature of the polymer was felt due to the evaporation of water after application.

[0060]

As described above, in the capsule of the present invention and the skin external preparation containing the capsule,
By adsorbing the volatile liquid oily component on the polymer and coating the outer layer with the solid oily component, it has a high sebum absorbability and excellent stability without impairing the feel as a cosmetic. Further, by adding a sebum secretion inhibitor to the inside of the capsule of the present invention and / or the external preparation containing the capsule, these synergistic effects further enhance the sebum secretion inhibiting effect.

Claims (9)

[Claims] 1. A capsule having sebum-absorbing ability, characterized in that a polymer component containing a volatile liquid oily component is coated with a solid oily component around the polymer component. 2. The capsule according to claim 1, wherein the temperature at which the solid oily component begins to melt is 30 to 100 ° C., which is higher than the temperature at which the volatile liquid oily component begins to solidify. 3. The capsule according to claim 1, wherein the temperature at which the volatile liquid oily component starts to vaporize is higher than the temperature at which the solid oily component begins to vaporize. 4. The weight ratio of the volatile liquid oily component to the polymer component is 0.5 to 10.
3. The capsule according to any one of 3. 5. The solid oily component is one selected from the group consisting of higher fatty acids, animal and vegetable oils, hydrocarbons, esters, silicones, higher alcohols, pigments, plant extracts, and ultraviolet absorbers. Alternatively, the capsule according to any one of claims 1 to 4, which is two or more kinds. 6. The volatile liquid oily component is selected from the group consisting of higher fatty acids, animal and vegetable oils, hydrocarbons, esters, silicones, higher alcohols, pigments, plant extracts, and ultraviolet absorbers. The capsule according to any one of claims 1 to 5, which is one kind or two or more kinds. 7. An external preparation for skin having sebum absorbing ability, containing the capsule according to any one of claims 1 to 6. 8. The external preparation for skin according to claim 7, which contains a sebum secretion inhibitor. 9. The sebum secretion inhibitor is blended with one or two or more kinds selected from the group consisting of extracts of aloe, tannin, dioxin, hypericum, Calendula officinalis, Hamamelis, horse chestnut, hops, and kiwi. Item 8
The topical skin preparation according to the above.