JPH09151125A - Cosmetics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a cosmetic adhesive to the skin, also thoroughly peelable as a signal film when released, dryable rapidly without leaving residues, containing a combination of an acrylic acid-alkyl methacrylate copolymer with a specific compound. SOLUTION: This cosmetic id obtained by formulating a combination of an arctic acid-alkyl methacrylate copolymer with fine silica particles at the weight ratio of pref. (1:1) to (1:10) using a film-forming agent and water. There is no limitation of the polymerization ratio of the acrylic acid and the alkyl methacrykate. The diameter of the fine silica particles pref. <=3μm or so. The film-forming agent is e.g. a polymer or a (co)polymer of carboxymethylcellose sodium salt, acrylic acid and/or vinyl acetate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cosmetics such as skincare cosmetics and makeup cosmetics, which form a film on the skin for removal and removal. The present invention relates to a cosmetic having excellent properties and forming a peelable film as a single film.

[0002]

2. Description of the Related Art As a film-forming cosmetic, a peel-off type pack agent as a skin care cosmetic is generally known. The peel-off type pack agent is one in which the pack agent is applied on the skin and the film formed after drying is peeled off. Polyvinyl alcohol is generally used as a film-forming agent for peel-off type pack agents, and carboxymethyl cellulose, hydroxyethyl cellulose, polyvinylpyrrolidone are used depending on the purpose of increasing the viscosity of cosmetics, forming a tough film, etc. , Polyvinyl acetate emulsion, xanthan gum and other resins are used together.

[0003]

However, when the film formed from the cosmetics using the above-mentioned resin has high strength, is hard and does not have sufficient stretchability, it lacks adhesion to the skin and causes cheek loss. It easily peels off due to the movement of the skin when moving the forehead or the forehead.

On the other hand, when the formed film has a sufficient extensibility but a low strength, the adhesion to the skin is good, but when it is peeled from the skin, It becomes difficult to cleanly separate the film as a sheet.

By using a water-soluble resin having a strong film-forming function as a film-forming agent and an acrylic acid / alkyl methacrylate copolymer which is soft and rich in elongation, the elongation required for the adhesion to the movement of the skin can be obtained to some extent. It is possible to form a film having both the property and the strength of the film required for peeling as a single film. However, depending on environmental conditions such as temperature and humidity, it may become somewhat stiff after drying and become relatively poor in extensibility.

That is, the acrylic acid / alkyl methacrylate copolymer has a film-forming function to some extent.
Depending on the environmental conditions such as temperature and humidity, it contributes to the toughness of the film and forms a film that becomes hard and lacks elongation after drying.

As a film softener, oils such as petrolatum, silicone oil, squalane, decaglyceryl dekaoleate, glyceryl oleate, glyceryl isostearate and myristyl myristate, a surfactant and the like are added to give a film having sufficient elongation. Although it is possible to form the film, the strength of the film is weakened, and a large amount of oil and surfactant remain after the film is peeled off, which is likely to adversely affect the usability. It is also possible to add a large amount of a film plasticizer such as glycerin, ethylene glycol, or propylene glycol, but it takes a long time to dry.

[0008]

SUMMARY OF THE INVENTION That is, the gist of the present invention is a cosmetic comprising at least an acrylic acid / alkyl methacrylate copolymer, fine particle silica, a film forming agent and water.

Hereinafter, the present invention will be described in detail. Acrylic acid / alkylmethacrylate copolymer can be used without restriction on the polymerization ratio of acrylic acid and alkylmethacrylate, but when the degree of polymerization of acrylic acid is made higher than that of alkylmethacrylate, the water solubility increases, and when it is made smaller, the aqueous solvent is used. It is thought to emulsify inside. Specific examples of the acrylic acid / alkyl methacrylate copolymer include Carbopol 1382, PEMULEN TR-1, and PEMU.
LEN TR-2 (above, BF Goodrich company make,
(USA), AQUPECV-501, AQUPEC H
V-504, AQPEC HV-505 (above, Sumitomo Seika Co., Ltd. product) etc. are mentioned.

The fine particle silica can be used without any limitation on the particle size and the like, but if the particle size is too large, it may impair the application feeling of the cosmetic to the skin, so it is preferable to use the particle size up to about 3 μm. preferable. As an example,
AEROSIL 200, AEROSIL 300, A
EROSIL MOX170, AEROSIL COK
84 (above, Nippon Aerosil Co., Ltd.), Nipsil
E220, Nipsil E220A, Nipsil
E1011 (above, Nippon Silica Industry Co., Ltd. product) etc. are mentioned.

Film-forming agents are commonly used,
Any water-soluble polymer having a strong film forming function can be used without limitation. Examples include natural or semi-synthetic polymers such as sodium carboxymethyl cellulose, hydroxypropyl cellulose, ernesto gum, hydroxypropylated guar gum, xanthan gum, gelatin, and polymers or copolymers of acrylic acid, vinylpyrrolidone, vinyl acetate, vinyl alcohol and the like. , Methyl vinyl ether / maleic anhydride copolymer, and the like.

Water is used as the main solvent. The mixing ratio of acrylic acid / alkyl methacrylate copolymer and fine particle silica is not particularly limited depending on the type of cosmetic composition such as a film-forming agent, a colorant, and a surfactant.
Since the alkyl methacrylate copolymer has a slight film forming function, if the ratio is extremely large, the film is strengthened together with the film forming agent, and the adhesion of the film to the movement of the skin is weakened. Further, if the ratio of the fine particle silica is extremely large, the strength of the film is weakened, and the film is torn when peeled, and it becomes impossible to peel it as a single film. Therefore, the mixing ratio of acrylic acid / alkyl methacrylate copolymer and fine particle silica is preferably about 1: 1 to 1:10.

In addition to the above essential components, various polymers and surfactants commonly used as components of cosmetics, such as organic solvents, humectants, dispersants, or dispersion aids,
Surfactants as penetrants, various antiseptic / antifungal agents, water-soluble polymers as viscosity modifiers, resins and water repellents for imparting water resistance, ultraviolet absorbers, chelating agents, pH adjusters, colorants , Fragrances and the like can be appropriately mixed. The colorant can be used as long as it can be used in cosmetics, and specific examples thereof include Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red 10
No. 6, Red 227, Red 230 (1), Red 23
No. 0 (2), Red 231, Red 232, Yellow 4
No. 5, Yellow No. 5, Yellow No. 202 (1), Yellow No. 202 (2), Yellow No. 203, Green No. 3, Green No. 201, Green No. 204, Green No. 205, Blue No. 1, Blue No. 2, Blue 2
No. 02, Blue No. 205, Daidai No. 205, Daidai No. 207, Brown No. 201 and their water-soluble dyes and their barium, calcium, zirconium, aluminum lake pigments, Red No. 201, Red No. 202, Red No. 203,
Red No. 204, Red No. 205, Red No. 206, Red No. 20
No. 7, Red 208, Red 215, Red 218, Red 219, Red 220, Red 221, Red 223
No., Red 225, Red 226, Red 228, Yellow 201, Yellow 204, Yellow 205, Green 202
No., Blue No. 201, Blue No. 204, Blue No. 404, Daidai No. 201, Dai No. 203, Dai No. 20
Pigments such as No. 4, Daidai No. 206, Daidai No. 401, Daidai No. 402, Daidai No. 403, Purple No. 201, yellow iron oxide, black iron oxide, red iron oxide, titanium dioxide, Gunjo, Konjo, chromium oxide, Examples thereof include inorganic pigments such as chromium hydroxide, carmine and shikonin, and composite powder pigments obtained by coloring organic or inorganic powder with a dye or pigment. These coloring materials may be used alone or in combination of two or more.

[0014]

[Function] When the fine particle silica is present between the molecules of the acrylic acid / alkyl methacrylate copolymer, it can inhibit the film formation of the acrylic acid / alkyl methacrylate copolymer. Therefore, the mixed film of the film forming agent, the acrylic acid / alkyl methacrylate copolymer, and the fine particle silica does not hinder the elongation. Further, the fine particle silica does not reduce the strength of the film because it hydrogen-bonds with both the water in the microgel formed by the acrylic acid / alkyl methacrylate copolymer molecule and the water present as the solvent in the cosmetic. . Due to the effect of such fine particle silica, it is not necessary to add a large amount of oil or a film plasticizer for imparting elongation to the film.

[0015]

The present invention will be described in more detail with reference to the following examples. In the examples and comparative examples, “parts” simply indicates “parts by weight”.

Example 1 Purified water 47.40 parts Ethanol 31.60 parts Glycerin 1.00 parts Olive oil 0.50 parts HCO-40 (polyoxyethylene hydrogenated castor oil, Nikko Chemicals Co., Ltd.) 1.50 parts MB -8C-R (composite pigment of polymethylmethacrylate and valve shell, manufactured by Sekisui Plastics Co., Ltd.) 13.00 parts PVA-217 (polyvinyl alcohol, manufactured by Kuraray Co., Ltd.) 4.00 parts PEMULEN TR-1 (Acrylic acid / alkyl methacrylate copolymer, manufactured by BF Goodrich, USA) 0.20 part AEROSIL 200 (fine particle silica, manufactured by Nippon Aerosil Co., Ltd.) 0.50 part Purified water 10.00 parts and PEMULEN among the above components
After stirring 0.20 parts at room temperature for 10 hours to form an aqueous solution, the PEMULEN aqueous solution and the components other than AEROSIL are heated and stirred to uniformly mix them, and then the above PEMULEN is mixed.
The aqueous solution and AEROSIL were added thereto, and the mixture was stirred at a low speed to obtain a brown cosmetic material.

Example 2 Purified water 48.18 parts Ethanol 32.12 parts Glycerin 0.90 parts Liquid paraffin 0.50 parts Oleyl glyceryl ether 2.00 parts Porous nylon and blue 404 composite pigment 12.50 parts Carboxy Sodium methylcellulose 2.00 parts AQPEC HV-505 (acrylic acid / alkyl methacrylate copolymer, Sumitomo Seika Chemicals Ltd.) 0.15 parts AEROSIL COK84 (fine particle silica, Nippon Aerosil Co., Ltd.) 1.20 parts Among the components, first, 7.50 parts of purified water and AQPEC0.
Agitate 15 parts at room temperature and leave for 10 hours to prepare an aqueous solution.
After the ingredients other than the QUPEC aqueous solution and AEROSIL are heated and stirred to be mixed uniformly, the above-mentioned AQPEC aqueous solution and A
EROSIL was added thereto, and the mixture was stirred at a low speed to obtain a blue cosmetic material.

Example 3 Purified water 47.34 parts Ethanol 31.56 parts Glycerin 0.50 parts Decaglyceryl decaoleate 0.60 parts Polyoxyethylene (30) octyl phenyl ether 1.50 parts Titanium oxide 15.00 parts Hydroxypropylated guar gum 1.00 part PEMULEN TR-2 (acrylic acid / alkyl methacrylate copolymer, manufactured by BF Goodrich, USA) 0.50 part Nipsil E220A (fine particle silica, manufactured by Nippon Silica Industry Co., Ltd.) 1.50 parts AEROSIL 200 (fine particle silica, manufactured by Nippon Aerosil Co., Ltd.) 0.50 part First of all, 25.00 parts of purified water and PEMULEN
0.50 parts is stirred at room temperature and left for 10 hours to prepare an aqueous solution, which is PEMULEN aqueous solution, Nipsil, AEROS
Ingredients other than IL and hydroxypropylated guar gum were stirred with a ball mill to uniformly mix and then taken out, and hydroxypropylated guar gum was added and mixed uniformly.
AQPEC aqueous solution and Nipsil, AEROSI
L was added thereto, and the mixture was stirred at a low speed to obtain a white cosmetic material.

Example 4 Purified water 42.00 parts Ethanol 28.00 parts Glycerin 0.50 parts Squalane 0.60 parts HCO-40 (polyoxyethylene hydrogenated castor oil, manufactured by Nikko Chemicals Co., Ltd.) 1.75 parts NIKKOMULESE 41 (liquid crystal forming surfactant, manufactured by Nikko Chemicals Co., Ltd.) 2.50 parts Spherical polymethylmethacrylate and red 404 composite pigment 13.00 parts Rubiscol VA55E (vinylpyrrolidone / vinyl acetate copolymer, BASF Corporation) Made, Germany) 10.00 parts Polyvinyl alcohol 1.00 parts Carbopol 1382 (acrylic acid / alkyl methacrylate copolymer, BF Goodrich, USA) 0.15 parts AEROSIL 300 (fine particle silica, Nippon Aerosil Co., Ltd.) Made) 0.50 parts First of all 7.50 parts of water making and Carbopol 0.
After stirring 15 parts at room temperature for 10 hours to form an aqueous solution, the carbopol aqueous solution and the components other than AEROSIL are heated and stirred to uniformly mix them, and then the carbopol aqueous solution, A
EROSIL was added thereto, and the mixture was stirred at a low speed to obtain a red cosmetic material.

Example 5 Purified water 45.54 parts Ethanol 30.36 parts Glycerin 0.50 parts Liquid paraffin 0.50 parts Polyoxyethylene (20) polyoxypropylene (4) cetyl ether 2.20 parts Spherical low density polyethylene 12.00 parts Methyl vinyl ether / maleic anhydride copolymer 7.50 parts PEMULEN TR-1 (acrylic acid / alkyl methacrylate copolymer, manufactured by BFGoodrich, USA) 0.20 parts AQUPEC HV-501 (acrylic acid / alkyl) Methacrylate copolymer, manufactured by Sumitomo Seika Co., Ltd. 0.10 part Nipsil E1011 (fine particle silica, manufactured by Nippon Silica Industry Co., Ltd.) 1.70 parts First of all, 15.00 parts of purified water and PEMULEN
Stir 0.20 parts and AQPEC 0.10 parts at room temperature to 1
Leave for 0 hours to make an aqueous solution, PEMULEN AQUP
After the EC aqueous solution and the components other than Nipsil were heated and stirred to be uniformly mixed, the PEMULEN · AQUPEC aqueous solution and Nipsil were added thereto and the mixture was stirred at a low speed to obtain a slightly cloudy color cosmetic.

Example 6 Purified water 46.80 parts Ethanol 31.20 parts Glycerin 0.20 parts Polyoxyethylene (6) sorbitan monostearate 1.00 parts MB-8C-BL-2 (polymethylmethacrylate and oxidation) Iron complex pigment, Sekisui Plastics Co., Ltd. 15.00 parts Xanthan gum 2.00 parts Carboxymethyl cellulose sodium 1.50 parts Carbopol 1382 0.30 parts AEROSIL 380 (fine silica, manufactured by Nippon Aerosil Co., Ltd.) 1.00 parts Mizukasil P-527 (fine particle silica, manufactured by Mizusawa Chemical Co., Ltd.) 1.00 parts Among the above components, first, 15.00 parts of purified water and 0.30 part of Carbopol 1382 are stirred at room temperature. Leave it for 10 hours to make an aqueous solution, and components other than AEROSIL 380 and Mizukacil P-527. After uniformly mixing by stirring and heating, the previous Carbopol 1382 solution and AERO
SIL 380 and Mizukacil P-527 were added and the mixture was stirred at low temperature to obtain a black cosmetic.

Comparative Example 1 AEROSIL 200 of Example 1 was replaced with PEMULEN.
A brown cosmetic was obtained in the same manner as in Example 1 except that TR-1 was used instead.

Comparative Example 2 A blue cosmetic composition was obtained in the same manner as in Example 2 except that liquid paraffin was used instead of AEROSIL COK84 of Example 2.

Comparative Example 3 Nipsil E220A of Example 3 was added to glycerin,
A white cosmetic composition was obtained in the same manner as in Example 3 except that decaglyceryl decaoleate was used instead of AEROSIL 200.

Comparative Example 4 A red cosmetic material was obtained in the same manner as in Example 4 except that the AEROSIL 300 of Example 4 was replaced with isocetyl isostearate.

Comparative Example 5 PEMULEN TR-1 and AQPEC of Example 5
A slightly cloudy color cosmetic was obtained in the same manner as in Example 5 except that AEROSIL 300 was used instead of HV-501.

[0027]

The cosmetics obtained in Examples 1 to 5 and Comparative Examples 1 to 5 were subjected to the following tests, and the results are shown in Table 1.

Test 1 Adhesion The prepared cosmetics were applied to the cheeks in a circular shape with a radius of 3 cm, and after the drying, the constant motion of moving the cheeks such that the entire film formed reciprocates left and right was repeated 50 times. As a result, the number of operations was confirmed when 1/10 or more of the area of the film was peeled from the cheek. Adhesion is considered to be good when 1/10 or more of the entire film does not peel off even after repeating the above operation 30 times.

Test 2 Peelability The prepared cosmetic was applied to the skin of 30 monitors using a spatula in a square of about 2 cm square and dried for a certain period of time.
After the film was formed, all were peeled off, and the number of films that could be completely peeled off as a single film was confirmed.

Test 3 Residual property The skin after all the films were peeled off in Test 2 was visually observed under a fluorescent lamp, and a residue (visible because the remaining oil etc. reflects light) could be confirmed. The number of film peeling marks that did not exist was confirmed.

Test 4 Stickiness Feeling The skin after all the films were peeled off in Test 2 was touched with a finger, and the number of film peeling marks which were felt to have no stickiness due to the residue was confirmed.

Test 5 Film dryness The prepared cosmetic was applied to a square of about 1 cm square at 50 places on the skin using a spatula, and the temperature was 26 ° C and the humidity was 50.
%, The film was touched by hand for 5 minutes, dried and the number of films in which a part thereof was not transferred to the hand was confirmed.

[0033]

[Table 1]

As described in detail above, the cosmetic composition according to the present invention has such adhesiveness that it does not peel off from the skin even when the skin moves, and when peeled off, it can be neatly peeled off as a single film, It is an excellent product that forms a film that dries quickly and has almost no residue on the skin after peeling.

Claims (1)

[Claims] 1. A cosmetic comprising at least an acrylic acid / alkyl methacrylate copolymer, fine particle silica, a film forming agent and water.