JP6909353B2 - Powder-containing external preparation for skin - Google Patents

Description

The present invention relates to a powder-containing external preparation for skin having excellent redispersibility.

Conventionally, powder-containing skin used as a deodorant agent containing powder in a liquid such as water or alcohol or as a refreshing cosmetic (cosmetic that gives a refreshing feeling) from the viewpoint of giving a silky feel after being applied to the skin. External preparations are widely used. These external preparations are used after being shaken to disperse the powder and then applied to the body. So-called caking problems may occur. For the purpose of solving this problem, a technique of blending a cationic polymer and a nonionic surfactant in a cosmetic containing silicic anhydride is known (Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-21028

On the other hand, the above-mentioned deodorant and refreshing cosmetics may contain a high amount of ethanol (for example, 50% by mass or more) from the viewpoint of quick-drying and usability, but Patent Document 1 does not contain a high amount of alcohol. It is not disclosed, and there is room for improvement in improving the redispersibility of the powder in the powder-containing external preparation for skin containing a high amount of ethanol.

An object of the present invention is to provide an external preparation for skin having improved quick-drying property and powder redispersibility.

As a result of diligent studies, the present inventors have found that by containing ethanol, powder, cationic polymer, and water, a skin external preparation having excellent powder redispersibility despite a high content of ethanol. I found that I could get it. Furthermore, they have found that the external preparation for skin has good slipperiness and excellent properties that do not cause whitening, and have completed the present invention.

That is, the present invention contains [1] ethanol, powder, cationic polymer, and water.
An external preparation for skin characterized by an ethanol content of 50.0 to 80.0% by mass.
[2] The skin external preparation according to [1], which has a powder content of 1.0 to 10.0% by mass.
[3] The external preparation for skin according to [1] or [2], wherein the content of the cationic polymer is 0.005 to 0.060% by mass.
[4] The skin external preparation according to any one of [1] to [3], wherein the content of the nonionic surfactant is less than 0.05% by mass.

The powdered skin external preparation of the present invention has excellent properties such as good redispersibility, quick-drying property, and slipperiness, and does not cause whitening.

The external preparation for skin according to this embodiment contains ethanol, powder, cationic polymer, and water as essential components. In this specification, when a numerical range is indicated by using "~", the numerical values at both ends thereof are included.

(ethanol)
The content of ethanol is preferably 50.0% by mass or more, more preferably 55.0% by mass or more, still more preferably 60.0% by mass or more, based on 100% by mass of the external preparation for skin according to the present embodiment. By setting the ethanol content to 50.0% by mass or more, quick-drying and usability are improved. On the other hand, from the viewpoint of preventing the precipitation of the cationic polymer, the ethanol content is preferably 80.0% by mass or less, more preferably 75.0% by mass or less.

(powder)
The powder is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include inorganic powder and organic powder. Further, the powder may be derived from any of natural products, granulated products, composite powders and the like. The shape of the powder is not particularly limited, and examples thereof include a spherical shape, a flaky shape, a plate shape, and a powder shape.

Specific examples of the powder include organic powders such as nylon, polystyrene, polyurethane, silicone, cellulose, polyoxyalkylene alkyl ether and silsesquioxane; silica, talc, hydroxyapatite, zinc oxide, titanium oxide and the like. Examples thereof include inorganic powder, and inorganic powder is preferable. More preferably, it is talc and silica. Talc and silica are preferable from the viewpoint of low cost. Further, talc can impart a smooth feel (smooth feel) to the skin to which the external preparation for skin is applied. In addition, silica can impart a dry feel to the skin to which the external preparation for skin is applied. While these powders can give a unique feeling of use in this way, inorganic powders (particularly talc and silica) are a phenomenon in which sedimented powders solidly aggregate during storage of external preparations for skin. ) Tends to occur. According to the present invention, the redispersibility can be improved even for such powders, which is preferable. As the powder, any one of the above-exemplified powders may be used alone, or two or more of them may be used in combination.

The average particle size of the powder is not particularly limited, but is preferably 0.5 to 30.0 μm, more preferably 1.0 to 25.0 μm, and 2.0 to 20 from the viewpoint of suppressing whitening on the skin. 0.0 μm is more preferable, and 4.0 to 15.0 μm is particularly preferable.

The content of the powder in the external preparation for skin according to the present embodiment is preferably 1.0 to 10.0% by mass, more preferably 1.0 to 8.0% by mass, and 1.2 to 6.0% by mass. % Is even more preferable, 1.5 to 5.0% by mass is further preferable, and 2.0 to 4.5% by mass is particularly preferable. By setting the content of the powder to 1.0% by mass or more, the silky feeling after applying the external preparation for skin according to the present embodiment to the skin is improved, and the usability is improved. Further, by setting the powder content to 10.0% by mass or less, caking during storage is further suppressed, and the effect of suppressing whitening on the skin is further improved.

(Cationic polymer)
By containing the cationic polymer, the external preparation for skin according to the present embodiment uniformly redisperses the powder, suppresses the aggregation thereof, and has no clogging and a feeling of use (smooth feeling, no stickiness). ) Can be an excellent powder skin external preparation.

The cationic polymer is not particularly limited and may be appropriately selected depending on the intended purpose. For example, cationized cellulose, cationized cellulose derivative, cationized starch, cationized guar gum, cationized guar gum derivative, diallyl quaternary ammonium. Homopolymer of salt, quaternized polyvinylpyrrolidone derivative, polyglycolpolyamine condensate, dialkyldialylammonium salt / acrylamide copolymer, vinylimidazolium trichloride / vinylpyrrolidone copolymer, hydroxyethylcellulose / dimethyldialylammonium chloride copolymer , Vinylpyrrolidone / quaternized dimethylaminoethyl methacrylate copolymer, polyvinylpyrrolidone / alkylaminoacrylate copolymer, polyvinylpyrrolidone / alkylaminoacrylate / vinylcaprolactam copolymer, vinylpyrrolidone / methacrylamidepropyl trimethylammonium chloride copolymer , Alkylacrylamide / acrylate / Alkylaminoalkylacrylamide / Polyethylene glycol methacrylate copolymer and the like. These may be used alone or in combination of two or more. Among them, since the silicic anhydride is uniformly redispersed and its aggregation can be suppressed, the polymer of dimethyldiallylammonium chloride, the dimethyldialylammonium chloride / acrylamide copolymer, and the acrylic acid / dimethyldialylammonium chloride are used together. Polymers, acrylic acid / dimethyldialylammonium chloride / acrylamide copolymers are preferred.

As the cationic polymer, a polymer synthesized as appropriate may be used, or a commercially available product may be used. Examples of commercially available products include cationized celluloses such as Polymer 10 (labeled name "Polyquaternium-10", manufactured by Lubrizol); Polymer 100, Polymer 106 (labeled name "Polyquaternium-6", manufactured by Lubrizol) and the like. Polymers of dimethyldiallylammonium chloride / dimethyldialylammonium chloride / acrylamide such as Merquat 550, Merquat 550PR, Merquat S, Merquat 2200, Merquat 740 (all labeled "Polyquaternium-7", manufactured by Lubrizol). Acrylic acid / dimethyldialylammonium chloride copolymers such as Merquat 280, Merquat 281 and Merquat 295 (all labeled "Polyquaternium-22", manufactured by Lubrizol); Merquat PLUS 3330 (labeled "Polyquaternium-39", Examples thereof include acrylic acid / dimethyldiallyl ammonium chloride / acrylamide copolymer (manufactured by Lubrizol) and the like.

The content of the cationic polymer in the external preparation for skin according to the present embodiment is preferably 0.005 to 0.060% by mass, more preferably 0.010 to 0.050% by mass, and 0.015 to 0.050%. Mass% is more preferred. When the content of the cationic polymer is in the above range, the powder is uniformly redispersed, its aggregation can be suppressed, and it is advantageous in that there is no clogging or stickiness.

(water)
Examples of the water used in the present embodiment include ion-exchanged water, ultra-filtered water, reverse osmosis water, pure water such as distilled water, and ultrapure water.

The content of water in the external preparation for skin according to the present embodiment is not particularly limited, and the content can be the balance excluding ethanol, powder, cationic polymer, and other components. From the viewpoint of ensuring the solubility of the cationic polymer, the water content is preferably 3.0% by mass or more, more preferably 5.0% by mass or more, still more preferably 10.0% by mass or more. Further, from the viewpoint of quick-drying and improvement of usability, the water content is preferably 48.0% by mass or less, more preferably 40.0% by mass or less, and further preferably 35.0% by mass or less.

(Other ingredients)
The external preparation for skin according to this embodiment may contain components other than ethanol, powder, cationic polymer, and water. Other ingredients include, for example, surfactants, fats and oils, hydrocarbon oils, waxes, higher fatty acids, ester oils, silicone oils, higher alcohols, polyhydric alcohols, sterols, moisturizers, thickeners, bactericides, etc. Acidity regulators, inorganic pigments, pigments, antioxidants, UV absorbers, vitamins, astringents, whitening agents, animal and plant extracts, metal ion blockers, preservatives, antiperspirants, deodorants, cooling agents, Examples include fragrances.

The external preparation for skin according to this embodiment may contain a thickener. The thickener is not particularly limited, and examples thereof include a cellulosic thickener and an acrylic acid thickener, and a cellulosic thickener is preferable. The thickener may be used alone or in combination of two or more.

The cellulosic thickener is not particularly limited, and examples thereof include methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxypropyl methyl cellulose. The acrylic acid-based thickener is not particularly limited, but is a copolymer and a crosspolymer formed by using a (meth) acrylic acid monomer and / or a (meth) acrylic acid alkyl monomer as essential constituents. Specifically, for example, carboxyvinyl polymer, alkyl (meth) acrylic acid copolymer, acrylic acid / alkyl methacrylate copolymer; Acrylate / polyoxyethylene methacrylate (20) cetyl ether copolymer, Acrylate / polyoxyethylene methacrylate (20). ) Stearyl ether copolymer, Acrylate / polyoxyethylene methacrylate (25) Behenyl ether copolymer, etc. (meth) acrylic acid / (meth) alkyl acrylate / (meth) polyoxyethylene alkyl ether copolymer acrylate; Polyoxyethylene acid (20) cetyl ether copolymer, acrylic acid / polyoxyethylene (20) stearyl ether copolymer, etc. (meth) acrylic acid / alkyl (meth) acrylic acid / polyoxyethylene alkyl ether copolymer of itacone; Polyoxyethylene methacrylate (20) Stearyl ether crosspolymer and other (meth) acrylic acid / (meth) alkyl acrylate / (meth) polyoxyethylene alkyl ether crosspolymer acrylate; Acrylate / vinyl neodecanoate crosspolymer, (acryloyl) Examples thereof include dimethyl taurine ammonium / VP) copolymer, (N-vinylpyrrolidone-N, N-dimethylaminoethyl methacrylate) crosspolymer (polyacrylate-1) and the like. Of these, carboxyvinyl polymers, alkyl (meth) acrylate copolymers, and (acryloyldimethyltaurine ammonium / VP) copolymers are preferred. The numerical values in parentheses represent the average number of moles of ethylene oxide added.

The content of the thickener in the external preparation for skin according to the present embodiment is preferably 0.1 to 5.0% by mass, more preferably 0.2 to 2.0% by mass. By setting the content of the thickener to 0.1% by mass or more, the external preparation for skin according to the present embodiment is appropriately thickened and is less likely to drip after application. Further, by setting the content of the thickener to 5.0% by mass or less, unpleasant stickiness after application can be reduced.

The external preparation for skin according to this embodiment may contain a bactericidal agent. The bactericidal agent is, for example, an agent that suppresses the growth of indigenous skin flora that produces a substance that causes body odor. The bactericidal agent is not particularly limited, and is, for example, benzalkonium chloride, benzethonium chloride, chlorhexidine hydrochloride, phenol, trichlorocarbanilide, chlorhexidine gluconate, isopropylmethylphenol, triclosan, triclocarban, pyrocton olamine, zincpyrythion, etc. Examples thereof include salicylic acid, sorbic acid, lysoteam chloride, and benzalkonium chloride and isopropylmethylphenol are preferable. The fungicide may be used alone or in combination of two or more.

The content of the bactericidal agent in the external preparation for skin according to the present embodiment is preferably 0.05 to 1.0% by mass, more preferably 0.05 to 0.5% by mass. By setting the content of the bactericidal agent to 0.05% by mass or more, the body odor suppressing effect due to the bactericidal effect is improved. Further, by setting the content of the bactericidal agent to 1.0% by mass or less, the hypoallergenicity of the external preparation for skin is improved.

The external preparation for skin according to this embodiment may contain an antiperspirant component. The antiperspirant component is a drug that suppresses the generation of sweat by converging the skin. The antiperspirant component is not particularly limited, and examples thereof include aluminum chloride, potassium aluminum sulfate, aluminum sulfate, aluminum acetate, chlorohydroxyaluminum, allantoinchlorohydroxyaluminum, zinc paraphenolsulfonate, and the like.

The external preparation for skin according to this embodiment may contain a deodorant component. The deodorant component is a drug having an effect of eliminating an odor by reacting with a substance that emits an odor, adsorbing a substance that emits an odor, or masking the odor. The deodorant component is not particularly limited, and examples thereof include titanium oxide-coated activated carbon, metal oxides such as zinc oxide, silica, alkyldiethanolamide, hydroxyapatite, tea extract, fragrance, antioxidant and the like.

The fats and oils are not particularly limited, and examples thereof include avocado oil, camellia oil, macadamia nut oil, olive oil, and castor oil. The waxes are not particularly limited, and examples thereof include carnauba wax, candelilla wax, jojoba oil, beeswax, and lanolin. The hydrocarbon oil is not particularly limited, and examples thereof include liquid paraffin, paraffin, petrolatum, ceresin, microcrystalline wax, squalene, and squalane. The ester oil is not particularly limited, and examples thereof include isopropyl palmitate, isopropyl myristate, propylene glycol monostearate, propylene glycol monolaurate, and polyglyceryl isostearate. The silicone oil is not particularly limited, but is, for example, a chain silicone such as methylpolysiloxane, highly polymerized methylpolysiloxane having an average degree of polymerization of 650 to 7000, methylphenylpolysiloxane, and methylhydrogenpolysiloxane; methylcyclo. Cyclic silicones such as polysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane; aminopropylmethylsiloxane / dimethylsiloxane copolymer, aminoethylaminopropylsiloxane / dimethylsiloxane copolymer, aminoethyl Amino-modified silicones such as aminopropylmethylsiloxane and dimethylsiloxane copolymers, carboxy-modified silicones, fatty acid-modified silicones, alcohol-modified silicones, aliphatic alcohol-modified silicones, epoxy-modified silicones, fluorine-modified silicones, alkyl-modified silicones and other modified silicones, etc. Can be mentioned.

The higher alcohol is not particularly limited, and examples thereof include lauryl alcohol and stearyl alcohol. The polyhydric alcohol is not particularly limited, but for example, glycerin, diglycerin, dipropylene glycol, 1,3-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol. , 1,2-Decandiol and the like.

The surfactant is not particularly limited, but for example, alkyl glyceryl ether, polyoxyalkylene alkyl ether, polyoxyalkylene cured castor oil, glycol fatty acid ester, glycerin fatty acid ester, polyoxyalkylene glyceryl ether fatty acid ester, sorbitan fatty acid ester. , Polyoxyalkylene sorbitan fatty acid ester, nonionic surfactant such as silicone surfactant; alkyl sulfate ester salt, polyoxyethylene alkyl ether sulfate salt, N-acyl-N-methyl taurine salt, alkyl ether phosphoric acid ester salt, Anionic surfactants such as N-acylamino acid salts; Cationic surfactants such as alkyltrimethylammonium chloride and dialkyldimethylammonium chloride; Amphoteric surfactants such as betaine alkyldimethylaminoacetate and betaine alkylamide propyldimethylaminoacetic acid Can be mentioned.

The content of the surfactant in the external preparation for skin according to the present embodiment is not particularly limited, but is preferably less than 0.05% by mass, more preferably less than 0.02% by mass, and further less than 0.01% by mass. preferable. Further, the content of the surfactant may be 0% by mass (that is, not contained). The external preparation for skin according to the present embodiment fully exerts the effect of the present invention even when the content of the nonionic surfactant is within the above range.

The refreshing agent is not particularly limited, and examples thereof include menthol, menthyl glyceryl ether, menthol lactate, peppermint oil, peppermint oil, camphor, and icillin. The antioxidant is not particularly limited, and examples thereof include tocopherol and its derivatives, ascorbic acid and its derivatives, and the like. The sequestrant is not particularly limited, and examples thereof include edetate, phosphoric acid, and sodium polyphosphate. The pH adjusting agent is not particularly limited, and examples thereof include citric acid and tartaric acid.

The external preparation for skin according to the present embodiment is preferably in the form of lotion, gel, roll-on, water or the like, and more preferably in the form of water or roll-on.

When the skin external preparation according to the present embodiment is used as a roll-on product, it includes a roll-on container and the skin external preparation according to the present embodiment filled in the roll-on container. The roll-on container is provided with a roll at the coating portion. The roll may be a cylindrical member or a spherical member.

The formulation of the external preparation for skin according to the present embodiment can be carried out by a generally known production method.

Hereinafter, the present invention will be described in more detail based on Examples, but the present invention is not limited to these Examples. Unless otherwise specified, the blending amount is the blending amount of the active ingredient and represents "mass%" with respect to 100% by mass of the external preparation for skin.

Hereinafter, various materials used in Examples and Comparative Examples are collectively shown.
Powder 1: SILICA PEARL 20CG (silica) manufactured by JGC Catalysts and Chemicals Co., Ltd., average particle size: 5.0 μm
Powder 2: Sunsphere H-51 (silica) manufactured by AGC SI-Tech Co., Ltd., average particle size: 5.0 μm
Powder 3: PLASTIC POWDER D-800 (polyurethane powder) manufactured by Toshiki Pigment Co., Ltd., average particle size: 5.5-8.0 μm
Powder 4: Talc MS (talc) manufactured by Nippon Talc Co., Ltd., average particle size: 20 μm
Powder 5: Ganzpearl GPA-550 (nylon powder) manufactured by Aica Kogyo Co., Ltd., average particle size: 4.0 to 6.0 μm
Cationic polymer 1: Merquat 550PR manufactured by Lubrizol (labeled name "Polyquaternium-7", dimethyldialylammonium chloride / acrylamide copolymer)
Cationic polymer 2: Mercut PLUS 3330 manufactured by Lubrizol (labeled name "Polyquaternium-39", acrylic acid / dimethyldialylammonium chloride / acrylamide copolymer)
Anionic polymer: CARBOPOL 980 POLYMER manufactured by Lubrizol Advanced Materials (display name "Carbomer")
HPC: Hydroxypropyl cellulose manufactured by Nippon Soda Co., Ltd.

(Examples 1 to 10 and Comparative Examples 1 to 8)
According to the composition (blending amount) shown in Tables 1 and 2, each component was mixed to prepare an external preparation for skin. The following evaluations were carried out for each of the obtained external preparations for skin.

(1) Redisperability Put 100 mL of the sample in a glass bottle (mayonnaise bottle) with a capacity of 120 mL, centrifuge at 1000 rpm for 2 minutes to settle the powder, and then shake vertically with a swing width of 15 cm (1 reciprocation / sec). ) Was repeated, and the number of shakings until the powder on the bottom surface was completely dispersed was measured. The measurement results were evaluated according to the following criteria.
[Evaluation criteria]
3 points (excellent): Within 10 times, the bottom surface does not remain and is uniformly dispersed.
2 points (good): No residue on the bottom surface is left within 11 times or more and 20 times or less, and the mixture is uniformly dispersed.
1 point (insufficient): No residue on the bottom surface is left within 21 times or more and 50 times or less, and the mixture is uniformly dispersed.
0 point (defective): Residue can be confirmed on the bottom surface even after shaking 51 times or more, or uniform dispersion is not possible.

(2) Quick-drying property About 0.2 g of each external preparation for skin was applied, and the quick-drying property was evaluated according to the following criteria from the feeling when the skin was patted with the palm after 1 minute. The evaluation was carried out by three expert evaluators under the conditions of constant temperature and humidity at 25 ° C. and 50% humidity RH.
[Evaluation criteria]
3 points (excellent): No liquid remains.
2 points (good): A little liquid remains, but I feel it is dry.
1 point (usable): Liquid remains, but there is no problem in use.
0 point (defective): Liquid remains and is uncomfortable to use.

(3) Slipperiness The slipperiness was evaluated according to the following criteria from the feeling when the skin was patted with the palm after applying about 0.2 g of each external preparation for skin and drying. The evaluation was carried out by three expert evaluators under the conditions of constant temperature and humidity at 25 ° C. and 50% humidity RH.
[Evaluation criteria]
3 points (excellent): I feel an extremely high smoothness.
2 points (good): The slipperiness is higher than before application, and a smooth feeling is felt.
1 point (usable): I feel a slight catch.
0 points (defective): I feel a strong catch.

(4) Whitening after application The presence or absence of whitening of the skin after applying about 0.2 g of each external preparation for skin and drying was evaluated according to the following criteria. The evaluation was carried out by three expert evaluators under the conditions of constant temperature and humidity at 25 ° C. and 50% humidity RH.
[Evaluation criteria]
3 points (excellent): There is no whitening on the skin after use.
2 points (good): A slight whitening occurs on the skin after use, but it is not noticeable in practice.
1 point (usable): Whitening occurs on the skin after use, but it can be used.
0 point (defective): Whitening is noticeable on the skin after use, and it is not suitable for use.

From the results of Tables 1 and 2, it can be seen that the external preparation for skin according to the present embodiment has excellent properties of good redispersibility, quick-drying property, slipperiness, and no whitening.

An example of prescribing the external preparation for skin of the present invention is shown below.

Prescription example 1 (roll-on)
Silica 3.0% by mass
Polyquaternium-7 0.04% by mass
Hydroxypropyl cellulose 0.3% by mass
Cymene-5-ol 0.1% by mass
Ethanol 70.0% by mass
Purified water balance

Prescription example 2 (water)
Silica 3.0% by mass
Polyquaternium-7 0.04% by mass
Menthol 0.5% by mass
Zinc Phenol Sulfonate 0.3% by Mass
Ethanol 70.0% by mass
Purified water balance

The powder-containing external preparation for skin of the present invention can be used as an external preparation for skin having good quick-drying property and redispersibility.

Claims (4)

Contains ethanol, powder, cationic polymer, and water,
An external preparation for skin characterized by an ethanol content of 50.0 to 80.0% by mass.
One or two powders selected from the group consisting of nylon, polystyrene, polyurethane, silicone, cellulose, polyoxyalkylene alkyl ether, silsesquioxane, silica, talc, hydroxyapatite, zinc oxide, and titanium oxide. That's it,
An external preparation for skin having a cationic polymer content of 0.005 to 0.060% by mass . The external preparation for skin according to claim 1, wherein the content of the powder is 1.0 to 10.0% by mass. The skin external preparation according to claim 1 or 2, wherein the content of the cationic polymer is 0.005 to 0.050% by mass. The external preparation for skin according to any one of claims 1 to 3, wherein the content of the nonionic surfactant is less than 0.05% by mass.