JP3389165B2 - Sheet pack cosmetics - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A thin oil film is formed on the surface of the epidermis of the skin, which prevents foreign substances from entering from the outside world, protects the skin from irritation of various substances, and suppresses water evaporation to prevent skin surface. It has the effect of lubricating. On the other hand, when the sebum is excessive, it may cause stickiness, gloss, makeup loss, and seborrheic diseases such as acne. Therefore, using a medicinal agent to physiologically suppress the secretion of sebum,
A method of physically adsorbing excessively secreted sebum to an oil-absorbing powder has been studied. However, an effective pharmaceutical agent that is compatible with the former method has not yet been found and has not been put into practical use.

On the other hand, as a method for physically absorbing sebum in an oil-absorbing powder, for example, a packing material containing lipophilic titanium dioxide or lipophilic silicon dioxide (JP-A-57-11231).
No. 4), cosmetics containing a barley stone powder having a median particle size of 5 to 15 μm (JP-A-9-263528), and the like are being studied. However, since these cosmetics are applied to the face by hand before use, there is a problem in that fingers are soiled during application and usability is poor. In addition, in order to obtain sufficient sebum absorption capacity, a large amount of oil-absorbing powder must be blended or applied thickly, and it is difficult to spread it evenly during application, resulting in uneven thickness and sebum absorption capacity. It was not even in terms of sebum absorption capacity, such as non-uniformity.

[0004]

The object of the present invention is to provide a sheet which can absorb sebum suitably, is excellent in the effect of improving and preventing sebum of sebum and makeup loss, and has good usability. The purpose is to provide cosmetics.

[0005]

Means for Solving the Problems The present inventors formed a sheet containing a specific oil-absorbing powder that absorbs a specific amount of squalane and a hydrogel formed by a water-soluble polymer and a crosslinking agent. It was found that the pack cosmetic can be easily applied without soiling the fingers and the like, absorbs sebum favorably, and has an excellent effect of improving and preventing greasiness and makeup loss.

According to the present invention, 15 to 60% by weight of oil-absorbing powder having an absorption of squalane selected from vinyl polymers and nylon of 1 mL / g or more, and a water-containing polymer formed by a water-soluble polymer and a cross-linking agent. It is intended to provide a sheet-shaped pack cosmetic in which a composition containing a gel is coated on a base cloth.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The oil-absorbing powder used in the present invention has a squalane absorption amount 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 amount of squalane absorbed is a value measured according to the pigment oil absorption measuring method defined in JIS K 5101 (1978).
That is, 1 g of the powder was taken on a glass plate, and the squalane was kneaded with a spatula while dripping the squalane little by little, and when the powder became a paste state as a whole, the end point was determined, and the amount of squalane at that time (mL) Is the oil absorption (mL / g).

The oil-absorbing powder includes vinyl acetate, N-vinylpyrrolidone, methacrylic acid ester, acrylic acid ester,
It is selected from the group of vinyl-based polymers obtained by polymerizing one or more kinds of monomers such as styrene and divinylbenzene, and nylon. These are preferably porous powders, which can be made porous by an ordinary method to adjust the amount of squalane absorbed.

The above 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 vinyl monomers having a solubility parameter of 7 to 10 include (meth) acrylic acid and 8 to 24 carbon atoms.
Esters with higher alcohols, styrene or carbon number 1
Examples thereof include a styrene derivative having a hydrocarbon substituent of 12 to 12, a vinyl ester of a saturated carboxylic acid having 8 to 20 carbon atoms, (meth) acrylic acid, and a diolefin having 4 to 6 carbon atoms. When a monomer having a solubility parameter of 7 to 10 is used, the compatibility with sebum is excellent and a higher sebum absorption capacity can be obtained. The oil-absorbing powder preferably swells with sebum but does not dissolve in terms of feel, and therefore, is preferably crosslinked. Crosslinking can be performed by a method of adding a polyfunctional monomer at the time of polymerization, post-crosslinking, self-crosslinking, or the like. Examples of the polyfunctional monomer include divinylbenzene, divinylpyridine, ethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate and the like.

Polymerization and porosification 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 in a state of being suspended, dispersed or emulsified in the above and removing the organic solvent after the completion of the polymerization.

Commercially available products of such oil-absorbing powders include porous nylon powders such as Organazole 2002 (manufactured by Elf Autochem); dimethyl silicone crosslinked elastomers such as Trefil E-506C (manufactured by Toray Dow Corning); Microspheres M, Microspheres M-100, Microspheres M-300, Microspheres M-400, Microspheres R-109 (manufactured by Matsumoto Yushi Co., Ltd.) and the like; Polytrap (manufactured by Dow Corning), etc. Examples thereof include a methacrylate copolymer.

The oil-absorbing powder has an average particle size of 0.005 to 0.005.
It is preferably 30 μm, particularly preferably 0.005 to 20 μm. In addition, the particle size of the oil-absorbing powder is 0.005 to 30 μm.
It is preferable that the amount of particles is 90% by weight or more.

The oil-absorbing powder may be used in one kind or more, and is 10 to 60% by weight, preferably 15 to 4% by weight in the whole composition.
0% by weight is compounded. If it is less than 10% by weight, sebum cannot be sufficiently absorbed, and if it exceeds 60% by weight, uniform kneading becomes difficult.

In the present invention, a water-soluble polymer is blended in order to form a sheet-like cosmetic, and thereby a hydrogel is formed. As the water-soluble polymer, polyacrylic acid,
Examples thereof include polymethacrylic acid, alginate, starch, agar, gelatin, pectin, casein, polyvinyl alcohol, polyvinylpyrrolidone and polyethylene oxide. One or more kinds of these water-soluble polymers can be used, and it is preferably added in an amount of 1 to 30% by weight, particularly 2 to 15% by weight based on the total composition.

In order to form a hydrogel, a cross-linking agent such as a polyvalent metal ion which causes a cross-linking reaction with the water-soluble polymer is blended. Examples of the cross-linking agent include calcium chloride,
Water-soluble salts such as aluminum chloride, potassium alum and aluminum sulfate, and polyvalent metal salts such as sparingly water-soluble or slightly water-soluble salts such as calcium hydroxide, aluminum hydroxide, calcium carbonate, calcium phosphate, aluminum stearate and calcium citrate. Is mentioned. These cross-linking agents are preferably added in an amount of 0.01 to 5 equivalents, particularly 0.1 to 2 equivalents based on the cross-linking point of the water-soluble polymer.

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, fluid oil, 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, colorants, fragrances, water and the like can be appropriately added.

The cosmetic 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 and molding the composition into a sheet, and if necessary, further. , Polyethylene film or the like can be applied. It can also be produced by coating the composition on a facing film and covering it with a base cloth, and then cutting it into a predetermined size.

As the base cloth, for example, knitted fabrics such as flannel and Sufmos, woven fabrics; nonwoven fabrics such as felt and spunlace; paper,
Examples include plastic sheets. The thickness of the base cloth is
0.1-1.0 mm, especially 0.1-0.5 mm is preferred,
The coating thickness of the composition is 0.1 to 1.0 mm, especially 0.1 to 1.0 mm.
0.5 mm is preferable. In addition, the total thickness is 0.1
2.0 mm, particularly 0.1 to 1.0 mm is preferable. The shape and size of the sheet are not particularly limited, and may be, for example, a sheet that covers the entire face or a sheet that is partially attached and used.

The sheet-shaped pack cosmetic of the present invention is used, for example, by sticking it on the face, leaving it for about 15 minutes to 10 hours, and then peeling it off. For example, it can be applied such that it is attached before going to bed and peeled off after waking up.

[0020]

EFFECTS OF THE INVENTION The sheet-shaped pack cosmetic of the present invention can be easily applied without soiling fingers and the like, has good usability, and absorbs sebum suitably to improve greasiness and makeup loss.
It has an excellent preventive effect.

[0021]

EXAMPLES Reference Example 1 Regarding the oil-absorbing powder shown in Table 1, the above JIS K 510 was used.
The amount of squalane absorbed was measured by a method similar to Method 1. Further, the average particle size of each powder was determined by a laser diffraction / scattering type particle size distribution measuring device manufactured by Horiba Ltd.

[0022]

[Table 1]

Example 1

[Table 2] (Component) (% 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 (4) Polyacrylic acid 1.0 (5) Aluminum hydroxide 0.3 (6) Methylparaben 0.1 (7) Purified water balance

(Production method) Components (3) and (4) were uniformly dispersed in component (2) using a kneader, and 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. This cosmetic material was uniformly applied onto a polyester film (thickness: 0.5 mm), covered with a polyester non-woven fabric, and molded into a sheet.

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

Example 3

[Table 3] (Component) (% 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) Methylparaben 0.1 (6) Purified water balance

(Manufacturing 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 (with a thickness of 0.
5 mm) and a non-woven fabric made of polyester, and formed into a sheet.

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

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

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

[Table 4] (Component) (% 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) Methylparaben 0.1 (5) Purified water balance

Test Example 1 With respect to the cosmetics obtained in the above Examples and Comparative Examples, the effects of improving the stainability, usability, greasiness of the fingers and the like and the effect of preventing makeup loss when using the cosmetics were evaluated. . The results are shown in Table 5.

(Evaluation Method) (1) Usability: Each of 10 female panelists applied each sheet to the face or applied a pack and left it for 30 minutes.
Removed or washed away. The method of use at this time was evaluated according to the following criteria. ○: 3 or less people rated it as “messy to use”. Δ: 4 to 6 people evaluated that “how to use is troublesome”. X: 7 or more persons evaluated that "how to use is troublesome".

(2) Oily greasiness improving effect and cosmetic shaving prevention effect: After the same use as in (1), sensory evaluation was performed on the oily greasing improving effect and cosmetic shaving prevention effect. It was judged. O: 7 or more persons evaluated that it was “effective”. Δ: 4 to 6 persons evaluated as “effective”. X: 3 or less persons evaluated that it was "effective."

[0034]

[Table 5]

Front Page Continuation (72) Keiichi Sugada Keiichi Sugada Inside Kao Co., Ltd. 2-1-3 Bunhana, Sumida-ku, Tokyo (56) References JP-A-10-167928 (JP, A) JP-A-9-249543 ( JP, A) JP 6-72824 (JP, A) JP 8-165219 (JP, A) JP 9-241126 (JP, A) JP 2-145505 (JP, A) JP 1-254612 (JP, A) JP 11-130664 (JP, A) JP 2-157217 (JP, A) JP 4-83712 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) A61K ^7/ 00-7/50

Claims (3)

(57) [Claims] 1. A hydrated gel formed by a water-soluble polymer and a cross-linking agent, and 15 to 60% by weight of an oil-absorbing powder having an absorption amount of squalane selected from vinyl polymers and nylon of 1 mL / g or more. A sheet-shaped pack cosmetic in which the contained composition is applied onto a base fabric. 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 of μm. 3. The content of the water-soluble polymer is 1 to 30% by weight.
The sheet-shaped pack cosmetic according to claim 1 or 2.