JP2001072566A - Sheet-like pack cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject cosmetic fouling neither finger nor the like, easily applicable, capable of suitably absorbing sebum and useful for improving and preventing greasiness of the sebum and messy makeup by including a specific amount of a specific oil absorbent powder. SOLUTION: This cosmetic is obtained by including 10-60 wt.% (A) oil absorbent powder having >=1 ml/g squalane absorption. Especially, the component A is preferably included 15-40 wt.%. This cosmetic preferably includes additionally (B) a hydrous gel comprising (i) water-soluble polymer and (ii) a crosslinking agent. The component i is preferably formulated 1-30 wt.% especially 2-25 wt.% per whole composition. The component ii is preferably compounded 0.01-5 equivalent especially 0.1-2 equivalent per closslinkable position of the component i. The component A is preferably a porous powder having 0.005-30 μm mean particle diameter and preferably >=90 wt.% component A has 0.005-30 μm particle diameter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet pack cosmetic which is used by adhering to the face for the purpose of absorbing sebum.

[0002]

2. Description of the Related Art A thin sebum film is formed on the surface of the epidermis of the skin, which prevents the invasion of foreign substances from the outside world, protects the skin from irritation of various substances, and suppresses the evaporation of water, thereby preventing the skin from evaporating. It has the effect of lubricating. On the other hand, if the sebum is excessive, it causes stickiness, shininess, makeup loss, etc., and also causes seborrheic diseases such as acne. Therefore, the secretion of sebum is physiologically suppressed using a medicinal agent,
A method of physically adsorbing excessively secreted sebum to an oil-absorbing powder has been studied. However, no effective medicinal agent compatible with the former method has been found yet, and has not been put to practical use.

On the other hand, as a method for physically absorbing sebum into an oil-absorbing powder, for example, a pack containing lipophilic titanium dioxide or lipophilic silicon dioxide (Japanese Patent Laid-Open No. 57-11231)
No. 4) and cosmetics containing barley rice powder having a median particle size of 5 to 15 μm (JP-A-9-263528) are being studied. However, since these cosmetics are used by being applied to the face by hand, there is a problem that fingers are soiled at the time of application and the usability is poor. In addition, in order to obtain sufficient sebum absorption ability, a large amount of oil-absorbing powder must be blended or thickly applied, and it is difficult to spread uniformly at the time of application. Was not satisfactory in terms of sebum absorption ability.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet which can absorb sebum in a favorable manner, is excellent in the effect of improving and preventing the oiliness of sebum and the loss of makeup, and has good usability. It is to provide a cosmetic in a shape.

[0005]

DISCLOSURE OF THE INVENTION The present inventors have found that a sheet-shaped pack cosmetic containing oil-absorbing powder that absorbs a specific amount of squalane can be easily applied without soiling fingers and the like.
Suitable for absorbing sebum, improving greasyness and makeup loss
It has been found that it is excellent in preventing effect.

According to the present invention, the absorption amount of squalane is 1 mL / g.
The present invention provides a sheet-shaped pack cosmetic containing the above oil-absorbing powder in an amount of 10 to 60% by weight.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The oil-absorbing powder used in the present invention has a squalane absorption of 1 mL / g or more, preferably 1.5 mL / g.
g or more. If it is less than 1 mL / g, sebum cannot be sufficiently absorbed. Here, the absorption amount of squalane is a value measured based on the pigment oil absorption measurement method specified in JIS K 5101 (1978).
That is, 1 g of powder is taken on a glass plate and kneaded with a spatula while dropping squalane little by little, and the end point is when the powder becomes a paste as a whole, and the amount of squalane at that time (mL) Is the oil absorption (mL / g).

[0008] Such oil-absorbing powders are not particularly limited as long as they are used in ordinary cosmetics, and include, for example, vinyl acetate, N-vinylpyrrolidone, methacrylate, acrylate, styrene, divinylbenzene and the like. And vinyl polymers obtained by polymerizing one or more of the above monomers, nylon, and silicic anhydride. These are preferably porous powders, which can be made porous by a usual method to adjust the amount of squalane absorbed.
Among these, hydrophobic oil-absorbing powders such as vinyl-based polymers and nylon are preferable because the oil-absorbing ability is not reduced by water or sweat.

The vinyl polymer is preferably a porous hydrophobic polymer obtained by polymerizing one or more vinyl monomers having a solubility parameter of 7 to 10. Examples of the vinyl monomer having a solubility parameter of 7 to 10 include (meth) acrylic acid and C8 to C24.
With higher alcohols, styrene or C1
Styrene derivatives having a hydrocarbon substituent of 12 to 12, vinyl esters of saturated carboxylic acids having 8 to 20 carbon atoms, (meth) acrylic acid, diolefins having 4 to 6 carbon atoms, and the like. When a monomer having a solubility parameter of 7 to 10 is used, the compatibility with sebum is excellent, and a higher sebum absorbency can be obtained. The oil-absorbing powder preferably swells with sebum but does not dissolve from the viewpoint of touch, and is therefore preferably crosslinked. Crosslinking can be performed by a method of adding a polyfunctional monomer during polymerization, post-crosslinking, self-crosslinking, or the like. Examples of the polyfunctional monomer include divinylbenzene, divinylpyridine, ethylene glycol di (meth) acrylate, and triethylene glycol di (meth) acrylate.

The polymerization and porosity formation of the vinyl monomer can be carried out, for example, according to the method described in JP-A-63-316715. The monomer is dissolved in a non-polymerizable organic solvent, and this solution is dissolved in water. It is preferable to carry out the polymerization by suspending, dispersing or emulsifying the mixture in an emulsion and removing the organic solvent after the polymerization.

Commercial products of such oil-absorbing powders include porous nylon powders such as Orgazole 2002 (manufactured by Elf Autochem); dimethyl silicone crosslinked elastomers such as Trefill E-506C (manufactured by Dow Corning Toray); Polymethyl methacrylate such as Microsphere M, Microsphere M-100, Microsphere M-300, Microsphere M-400, Microsphere R-109 (manufactured by Matsumoto Yushi); Polytrap (manufactured by Dow Corning) and the like. And methacrylate copolymers.

The oil-absorbing powder has an average particle size of 0.005 to 0.005.
Those having a thickness of 30 μm, particularly 0.005 to 20 μm, are preferred. Also, among the oil-absorbing powders, the particle size is 0.005 to 30 μm.
Is preferably 90% by weight or more.

One or more oil-absorbing powders can be used, and 10 to 60% by weight, preferably 15 to 4% by weight in the total composition.
0% by weight is blended. If it is less than 10% by weight, sebum cannot be sufficiently absorbed, and if it exceeds 60% by weight, uniform kneading becomes difficult. Further, it is preferable that the hydrophobic oil-absorbing powder as described above is blended in an amount of 5% by weight or more, particularly 10 to 40% by weight in the whole composition.

In the present invention, it is preferable that a water-soluble polymer can be blended in order to form a sheet-like cosmetic, thereby forming a hydrogel. Examples of the water-soluble polymer include polyacrylic acid, polymethacrylic acid, alginate, starch, agar, gelatin, pectin, casein, polyvinyl alcohol, polyvinylpyrrolidone, and polyethylene oxide. One or more of these water-soluble polymers can be used, and 1 to 30
% By weight, particularly preferably 2 to 15% by weight.

In order to form a hydrogel, it is preferable to add a crosslinking agent such as a polyvalent metal ion which causes a crosslinking reaction with the water-soluble polymer. Examples of the crosslinking agent include water-soluble salts such as calcium chloride, aluminum chloride, potassium alum, and aluminum sulfate, calcium hydroxide, aluminum hydroxide, calcium carbonate, calcium phosphate,
Examples thereof include polyvalent metal salts such as poorly water-soluble or slightly water-soluble salts such as aluminum stearate and calcium citrate.
These cross-linking agents are used for the cross-linking point of the water-soluble polymer.
It is preferable to mix 0.01 to 5 equivalents, particularly 0.1 to 2 equivalents.

In the cosmetic of the present invention, in addition to the above-mentioned components, components used in ordinary cosmetics, such as solid / semi-solid oil components, fluid oil components, hydrocarbons, higher alcohols, higher fatty acids, esters, silicones, Lower alcohols, polyhydric alcohols, sugars, amino acids, vitamins, organic amines, synthetic resin emulsions, surfactants, humectants, thickeners, film-forming agents, pH adjusters, antibacterial agents, anti-inflammatory agents, antioxidants Agents, coloring agents, fragrances, water and the like can be appropriately compounded.

The cosmetic composition of the present invention can be produced, for example, by impregnating or coating a composition obtained by mixing the above-mentioned components by a conventional method on a base fabric to form a sheet. And a facing such as a polyethylene film. Alternatively, the raw material obtained by applying the composition on a facing film and covering the base fabric can be cut into predetermined dimensions.

As the base fabric, for example, knitted fabrics such as flannel and sufmos, woven fabrics; nonwoven fabrics such as felt and spunlace; paper;
Plastic sheets and the like can be mentioned. The thickness of the base fabric is
0.1 to 1.0 mm, particularly preferably 0.1 to 0.5 mm,
The coating thickness of the composition is from 0.1 to 1.0 mm, especially from 0.1 to 1.0 mm.
0.5 mm is preferred. In addition, the overall thickness is 0.1 to
2.0 mm, especially 0.1 to 1.0 mm, is preferred. The shape and size of the sheet are not particularly limited, and may be, for example, either a sheet covering the entire face or a sheet partially adhered.

The sheet-shaped pack cosmetic of the present invention is used, for example, after being adhered to the face, left for about 15 minutes to 10 hours, and then peeled off. For example, it is possible to apply a method of sticking before going to bed and peeling after getting up.

[0020]

EFFECT OF THE INVENTION The sheet-shaped pack cosmetic of the present invention can be easily applied without soiling fingers, etc., has good usability, and absorbs sebum appropriately to improve greasyness and makeup loss.
It has an excellent effect of preventing.

[0021]

EXAMPLES Reference Example 1 The oil-absorbing powder shown in Table 1 was subjected to the above-mentioned JIS K510.
The absorption amount of squalane was measured by a method according to Method 1. The average particle size of each powder was determined using a laser diffraction / scattering type particle size distribution analyzer manufactured by Horiba, Ltd.

[0022]

[Table 1]

Embodiment 1

(Components) (% by weight) (1) Porous vinyl polymer (Synthesis Example 1 of JP-A-63-316715) 30.0 (2) Glycerin 15.0 (3) Sodium polyacrylate 6 0.0 (4) Polyacrylic acid 1.0 (5) Aluminum hydroxide 0.3 (6) Methyl paraben 0.1 (7) Purified water balance

(Production method) Using a kneader, the components (3) and (4) were uniformly dispersed in the component (2), and the components (6) and (7) were added thereto and kneaded uniformly. Further, the components (1) and (5) were added and kneaded uniformly to obtain a cosmetic. The cosmetic was uniformly applied on a polyester film (thickness: 0.5 mm), covered with a polyester nonwoven fabric, and formed into a sheet.

Example 2 In Example 1, instead of the porous vinyl polymer,
A sheet-shaped pack cosmetic was produced in the same manner except that polymethyl methacrylate (Microsphere R-109, manufactured by Matsumoto Yushi Co., Ltd.) was used.

Embodiment 3

(Components) (% by weight) (1) Porous vinyl polymer (Synthesis Example 1 of JP-A-63-316715) 30.0 (2) Glycerin 15.0 (3) Sodium alginate 2.5 (4) Calcium sulfate dihydrate 2.0 (5) Methyl paraben 0.1 (6) Purified water balance

(Preparation method) The component (3) was uniformly dispersed in the component (2) using a kneader, and the components (5) and (6) were added thereto and kneaded uniformly. Further, the components (1) and (4) were added and kneaded uniformly to obtain a cosmetic. This cosmetic is applied evenly on a polyester film (thickness 0.
5 mm) and covered with a polyester nonwoven fabric to form a sheet.

Comparative Example 1 In Example 1, instead of the porous vinyl polymer,
A sheet pack cosmetic was produced in the same manner except that mica (MIKA-2000) was used.

Comparative Example 2 A sheet-shaped pack cosmetic was produced in the same manner as in Example 1 except that the amount of the porous vinyl polymer was changed to 5.0% by weight.

Comparative Example 3 Packing agent having the following composition (type to be applied to face by hand)
Was produced by a conventional method.

(Components) (% by weight) (1) Porous vinyl polymer (Synthesis Example 1 of JP-A-63-316715) 30.0 (2) Glycerin 15.0 (3) Xanthan gum 1.0 ( 4) Methyl paraben 0.1 (5) Purified water balance

Test Example 1 The cosmetics obtained in the above Examples and Comparative Examples were evaluated for the effect of improving the stainability of fingers and the like, the usability, the greasyness and the effect of preventing makeup loss when using the cosmetics. . Table 5 shows the results.

(Evaluation Method) (1) Usability: Ten female panelists affix each sheet to the face or apply a pack to the face and leave for 30 minutes.
Peeled or washed off. The method of use at this time was evaluated according to the following criteria. ；: 3 or less evaluated that “how to use is troublesome”. Δ: 4 to 6 persons evaluated that “the usage was troublesome”. ×: 7 or more evaluated that “how to use is troublesome”.

(2) The effect of improving greasyness and the effect of preventing makeup loss: After the same use as in (1), the effect of improving greasyness and the effect of preventing makeup loss are organoleptically evaluated, and the following criteria are used. Judged. ；: 7 or more evaluated “effective”. Δ: 4 to 6 persons evaluated “effective”. X: 3 or less evaluated as "effective".

[0034]

[Table 5]

 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Keiichi Suga 2-1-3 Bunka, Sumida-ku, Tokyo F-term in Kao Corporation Research Laboratories 4C083 AB032 AB172 AB362 AB442 AC122 AC482 AD012 AD072 AD302 BB21 BB36 CC07 DD12 DD41 EE11

Claims (3)

[Claims] 1. A sheet pack cosmetic containing 10 to 60% by weight of an oil-absorbing powder having a squalane absorption of 1 mL / g or more. 2. The oil-absorbing powder has an average particle size of 0.005 to 30.
The sheet-shaped pack cosmetic according to claim 1, which is a porous powder having a thickness of μm. 3. The sheet pack cosmetic according to claim 1, further comprising a hydrogel comprising a water-soluble polymer and a crosslinking agent.