JP2006232674A - Deodorant cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorant cosmetic containing zinc oxide-containing composite particles useful as a deodorant. <P>SOLUTION: The deodorant cosmetic contains composite particles comprising zinc oxide, particulate polymer particles and a solvent-dispersible polysaccharide. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a deodorant cosmetic containing zinc oxide-containing composite particles useful as a deodorant.

  Body odors include sweat odor, habit odor, foot odor, and the like, but these are produced by skin resident bacteria that produce the sweat and odor that cause odor. Deodorant cosmetics for these body odors contain antiperspirants, bactericides, deodorants and the like.

Of the deodorants, zinc oxide has a function of deodorizing by converting lower fatty acids, which cause body odor, into metal salts thereof, and is widely used. In addition, zinc oxide composite powder has also been developed to improve the feeling of use (Patent Document 1).
Japanese Patent No. 2628058

However, the deodorizing effect of zinc oxide and zinc oxide composite powder conventionally used as a deodorant is not yet satisfactory, and the sustainability is not satisfactory.
Therefore, the objective of this invention is providing the deodorant cosmetics containing the novel zinc oxide composite particle which is excellent in the deodorizing effect, its sustainability, and a usability | use_condition.

  Therefore, the present inventor conducted various studies on the complexation of zinc oxide, and when complexed using zinc oxide and crystalline cellulose, particles with a good feeling of use and a certain deodorizing effect were obtained. Sustainability was not enough. Therefore, further investigation was continued, and in addition to zinc oxide and particulate polymer powder, compounding was performed using a solvent-dispersible polysaccharide. The deodorizing effect of the obtained composite particles was It has a strong deodorizing effect not only on herbic acid but also on 3-methyl-2-hexenoic acid, which is known as apocrine odor. The present invention was completed by finding that it has excellent properties and good usability.

  That is, the present invention provides a deodorant cosmetic containing composite particles composed of zinc oxide, particulate polymer powder, and solvent-dispersible polysaccharide.

  The deodorant cosmetic containing the composite particles of the present invention strongly deodorizes not only the sweat odor but also the habit odor, and is particularly excellent in the deodorizing effect after sweating, and the sustainability is also good. Furthermore, there is no white residue and the usability is good.

  The composite particles used in the present invention are particles in which three types of zinc oxide, particulate polymer powder, and solvent-dispersible polysaccharide are combined. The zinc oxide constituting the composite particles is not particularly limited as long as it is usually used in cosmetics. For example, those having an average particle diameter of 10 nm to 100 μm, further 100 nm to 10 μm, and particularly 100 nm to 1 μm are preferable. For example, commercially available products such as fine zinc oxide (Sakai Chemical Industry) can be used.

  The zinc oxide content in the composite particles is preferably 0.1 to 98% by mass, more preferably 1 to 90% by mass, and particularly preferably 5 to 75% by mass from the viewpoint of the deodorizing effect.

  The particulate polymer powder is not particularly limited as long as it is insoluble in water and is a spherical or substantially spherical polymer powder. For example, cellulose powder, polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder , Polystyrene powder, styrene-acrylic acid copolymer powder, benzoguanamine resin powder, polytetrafluoroethylene powder, and the like. You may use these in mixture of 2 or more types. Among these, cellulose powder is particularly preferable from the viewpoints of use feeling, deodorizing effect, and sustainability. The average particle diameter of the particulate polymer powder is preferably 1 to 500 μm, more preferably 10 to 100 μm, and particularly preferably 20 to 50 μm.

  The content of the particulate polymer powder in the composite particles is preferably 1 to 98% by mass, more preferably 20 to 60% by mass, and particularly preferably 20 to 50% by mass in terms of the deodorizing effect and its sustainability.

  The solvent-dispersible polysaccharide is not particularly limited as long as it is a polysaccharide that is dispersed in water or an organic solvent. For example, crystalline cellulose, carboxymethylcellulose salt, rayon, cellulose acetate, ethylcellulose, methylcellulose, methylethylcellulose, hydroxyethylcellulose, hydroxy Examples include ethylethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxypropylmethylcellulose phthalate, carboxymethylhydroxymethylcellulose, carboxymethylchitin, dextrin and dextrin fatty acid ester. Particularly preferred are crystalline cellulose, sodium carboxymethylcellulose, and dextrin. These solvent dispersible polysaccharides may be used in combination of two or more.

  The content of the solvent-dispersible polysaccharide in the composite particles is preferably 2 to 30% by mass, more preferably 2 to 20% by mass, and particularly preferably 5 to 15% by mass from the viewpoint of deodorizing effect and its sustainability.

  The composite particles can be produced, for example, by dispersing zinc oxide, particulate polymer powder and solvent-dispersible polysaccharide in a solvent such as water to form a slurry, which is spray-dried. Examples of the solvent include water, alcohols such as methanol, ethanol, propanol, isopropanol, and butanol, acetone, and the like, but water is preferable. Moreover, the usage-amount of a solvent is 2-10 mass times with respect to the whole raw material, Especially 4-8 mass times is preferable.

  The average particle diameter of the composite particles is preferably 0.1 to 800 μm, more preferably 10 to 500 μm, and particularly preferably 10 to 100 μm.

  The composite particles thus obtained are excellent in the deodorizing effect and its sustainability. The deodorizing effect and its persistence are particularly good when applied to sweaty skin. Furthermore, it has an excellent deodorizing effect not only on isovaleric acid, which is said to cause sweat odor, but also to 3-methyl-2-hexenoic acid, which is said to cause odor. Furthermore, even if it is applied to the skin, it does not remain white and the feeling of use is good. Therefore, if this composite particle is mix | blended, the deodorant cosmetics which can deodorize both sweat odor and candy odor continuously can be obtained.

  The content of the composite particles in the deodorant cosmetic composition of the present invention is preferably 0.01 to 40% by mass, more preferably 0.05 to 40% by mass, and particularly preferably 0.05 to 30% by mass.

  The deodorant cosmetic composition of the present invention can further contain an antiperspirant, a disinfectant, another deodorant and the like.

  Antiperspirants include, for example, chlorohydroxyaluminum, zinc paraphenolsulfonate, aluminum hydroxychloride, aluminum chloride, aluminum sulfate, aluminum citrate, aluminum acetate, basic aluminum chloride, aluminum phenolsulfonate, α-naphthol disulfonic acid Aluminum, sodium perborate, aluminum zirconium octachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium trichlorohydrate, zirconium chlorohydrate, potassium aluminum sulfate, allantochlorohydroxyaluminum, basic Aluminum bromide, aluminum naphthalene sulfonic acid Basic aluminum iodide, zinc oxide and the like. Two or more of these may be used. Preferred are chlorohydroxyaluminum and zinc paraphenolsulfonate.

  Examples of the disinfectant include benzalkonium chloride, triclosan, isopropylmethylphenol, 3,4,4-trichlorocarbanilide (TC), triethyl citrate (TEC), benzethonium chloride, Examples thereof include alkyltrimethylammonium chloride, resorcin, phenol, sorbic acid, salicylic acid, hexachlorophene, chlorhexidine gluconate, chlorhexidine isopropylmethylphenol hydrochloride, silver-supported zeolite, and silver-supported silica. Two or more of these may be used. Preferred are benzalkonium chloride, triclosan, and isopropylmethylphenol.

  Examples of other deodorants include plant extracts such as zinc oxide, activated carbon, and green tea extract. Two or more of these may be used. Of these, green tea extract is particularly preferred.

  Antiperspirants, bactericides, and other deodorants other than the composite particles are 0 to 40% by mass, further 0.01 to 30% by mass, and particularly 0.05 to 20% by mass, in the deodorant cosmetics of the present invention. % Content is preferable.

  In addition to the above-described components, the deodorant cosmetic of the present invention has other components used in the cosmetic within a range not impairing the effects of the present invention, such as cooling agents, powder components, water-soluble components, liquid fats and oils, solids Fats and oils, waxes, hydrocarbon oils, higher fatty acids, higher alcohols, ester oils, silicone oils, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, humectants, water-soluble polymers, increased Adhesives, film agents, UV absorbers, sequestering agents, sugars, amino acids, organic amines, polymer emulsions, pH adjusters, skin nutrients, vitamins, antioxidants, antioxidant aids, fragrances, water, etc. It can mix | blend suitably as needed. Here, as a cooling sensation agent, menthol, camphor, eucalyptus oil, etc. are preferable.

  Examples of the dosage form of the deodorant cosmetic of the present invention include a solution system, a solubilization system, an emulsification system, a powder dispersion system, a water-oil two-layer system, and a water-oil-powder three-layer system. The product form can also be aerosol, lotion, roll-on, stick, etc., for example.

  Next, the present invention will be described more specifically with reference to examples. The present invention is not limited thereby. % Is mass%.

Example 1
40 parts by mass of fine particle zinc oxide (Sakai Chemical Industry Co., Ltd., “fine zinc oxide”, average particle size 0.3 μm), cellulose powder (Daito Kasei Co., Ltd., “Cellulobeads-P5”, average particle size 11.0 μm) ) 45 parts by mass and 15 parts by mass of crystalline cellulose (Asahi Kasei Chemicals Co., Ltd., “Avicel RC-A591NF”, crystalline cellulose content 80% ≧) are added to 4 times the amount of water and stirred at 90 ° C. while stirring at high speed. And then stirred for 1 hour to disperse. The slurry was spray-dried by spray drying to evaporate water. Classification was performed with a cyclone to obtain composite particles having a particle size of 10 to 100 μm.

Example 2
Isovaleric acid was used as the odorous substance. A 3% aqueous solution of isovaleric acid was prepared and 1 mL was added to the vial. Thereto was added 0.1 g of the composite particles obtained in Example 1 and the lid was covered. After standing at 60 ° C. for 15 minutes, the gas phase portion was measured with a headspace gas chromatograph, and the amount of isovaleric acid was quantified. The deodorization rate was calculated using the amount of isovaleric acid in the gas phase portion without adding the composite particles as a control. As a result, the deodorization rate was 80%, and an extremely strong deodorizing effect was obtained.

Example 3
Deodorant preparations having the formulations shown in the following table were prepared. The obtained deodorant agent had an excellent deodorizing effect and durability.

Claims (5)

  A deodorant cosmetic containing composite particles comprising zinc oxide, particulate polymer powder and solvent-dispersible polysaccharide.   Powder in which the particulate polymer powder is selected from cellulose powder, polyamide resin powder, polyethylene powder, polymethyl methacrylate powder, polystyrene powder, styrene-acrylic acid copolymer powder, benzoguanamine resin powder and polytetrafluoroethylene powder The deodorant cosmetic according to claim 1, which is a body.   Water-dispersible polysaccharides are crystalline cellulose, carboxymethylcellulose salt, rayon, cellulose acetate, ethylcellulose, methylcellulose, methylethylcellulose, hydroxyethylcellulose, hydroxyethylethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxypropylmethylcellulose phthalate, carboxymethylhydroxymethylcellulose The deodorant cosmetic according to claim 1 or 2, which is selected from carboxymethylchitin, dextrin and dextrin fatty acid ester.   The deodorant cosmetic according to any one of claims 1 to 3, wherein the granular polymer powder is cellulose powder and the water-dispersible polysaccharide is crystalline cellulose.   The deodorant cosmetic according to any one of claims 1 to 4, wherein the composite particles have an average particle size of 0.1 to 800 µm.