JPS636523B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a powder deodorant. More specifically, the present invention relates to a powder deodorant that exhibits an excellent deodorant effect against body odors such as armpit odor, hem odor, and foot odor. [Prior art] Strong body odors such as armpit odor and foot odor cause discomfort and pain not only to the person themselves but also to those around them, and place a heavy psychological and mental burden on those suffering from body odor. . In general, the mechanism by which body odor, including armpit odor, occurs has not yet been completely elucidated, but in the case of armpit odor (armpit odor), apocrine gland secretions, sebum, keratin, and cellular excrement are caused by the action of bacteria. It is thought that this substance is decomposed and produced as a substance characteristic of armpit odor. In addition, as malodorous substances,
Lower fatty acids such as butyric acid, isovaleric acid, caproic acid, and caprylic acid, ammonia, amines, indoles, mercaptans, and hydrogen sulfide are considered. Traditionally, cosmetics used to prevent the release and secretion of body odor include those that use astringents to suppress the production of sweat with their strong astringent effects, and those that use bactericidal agents to prevent the growth of bacteria and prevent the decomposition of sweat. Masking methods using fragrances are known. The most common astringents known include basic aluminum chloride and a basic aluminum chloride/propylene glycol complex. In addition, benzalkonium chloride, benzethonium chloride, triclosan isopropylmethylphenol, etc. are used as disinfectants. [Problems to be solved by the invention] However, since the above method indirectly prevents the release of body odor, its body odor removal effect is insufficient, or it is not a method that simply masks body odor sensually. However, even if these astringents, bactericides, and fragrances are used in combination, a satisfactory deodorant cosmetic cannot be obtained. The present invention has been made through extensive research in order to overcome the drawbacks of conventional deodorant cosmetics and to develop a powdered deodorant that can directly, effectively and quickly remove body odor. In the process, one of the inventors first introduced an aqueous solution of a water-soluble inorganic compound such as sodium silicate,
A W/O emulsion prepared from an organic solvent with a solubility in water of 5 wt% or less, and an aqueous solution of a water-soluble inorganic compound that reacts with the above inorganic compound to form a water-insoluble precipitate, such as calcium chloride, sulfuric acid, etc. When mixed, it is possible to produce microspheres that inherit the size and form of the emulsion particles that make up the emulsion, and by taking advantage of their excellent powder properties, they can be used as fillers for plastics and for coloring paints, etc. discovered that it was useful as a drug, and
The invention related to No. 57-55454 was completed. The present invention was developed as a result of research into the specificity of the shape and structure of microspheres produced by a method previously developed by one of the inventors, and the characteristics based on these. It is a fine, fluid, almost perfectly spherical powder with a porous hollow structure, and the constituent components of the microspheres are inorganic substances selected from alkaline earth metal silicates and carbonates. In some cases, in addition to having a large specific surface area, the basic property, that is, the basic strength H _- is +
93<H _- <+15.0, (for base strength
There is Hammett's basicity function (H _- ), and the more positive this value is, the greater the basic strength of the solid surface becomes, and the basicity reacts with lower fatty acids, which are acids, to deodorize (Butyric acid) , isovaleric acid,
It shows an effective deodorizing effect on the bad odor of lower fatty acids such as caproic acid and caprylic acid, and when the constituent component of the microspheres is silica, its specific surface area is
It shows a very large value of 100m ² /g to 800m ² /g, and is suitable for deodorizing ammonia, amines, and other nitrogen-containing compounds, especially trimethylamine, which are mainly physically adsorbed on solid surfaces. It was discovered and perfected that it exhibits excellent deodorizing properties. [Means for Solving the Problems] That is, the present invention provides an almost complete silica material whose main component is silica or an inorganic substance selected from silicates and carbonates of alkaline earth metals, and whose particle size is from 0.3 μm to 10 μm. The gist thereof is a powder-type deodorant composition characterized by containing porous hollow/spherical fine particles exhibiting a spherical shape as an active ingredient.
Body odor such as armpit odor, leg odor, and foot odor, especially butyric acid,
It has a remarkable deodorizing effect on lower fatty acids such as isovaleric acid, caproic acid, and caprylic acid, and amines such as ammonia and trimethylamine, and the effect is visible within a short period of time after use. . Therefore, the time required for mental distress from the time the odor begins to bother you until the onset of effects is short. In addition, since the particles are almost completely spherical particles with a particle size of 0.3 μm to 10 μm, when applied to the skin, they have good fluidity and are smooth, giving a good feeling of use. Examples of inorganic substances selected from alkaline earth metal silicates and carbonates used in the composition of the present invention include magnesium silicate, calcium silicate, and calcium carbonate, and the composition mainly contains silica. If the specific surface area is
Examples include porous hollow and spherical silica fine particles of 100 m ² /g to 800 m ² /g. The powder deodorant composition of the present invention consists of porous, hollow, spherical fine particles of an inorganic material selected from alkaline earth metal silicates and carbonates having a particle size of 0.3 μm to 10 μm and exhibiting an almost perfect spherical shape; The essential component is porous hollow and spherical fine particles of silica, but in addition,
Inorganic powder such as talc, astringent such as basic aluminum chloride, bactericidal agent such as benzalkonium chloride, fragrance, and other additives may be included as necessary. [Action and Effect] According to the powder deodorant of the present invention, the odor of lower fatty acids such as butyric acid, isovaleric acid, caproic acid, and caprylic acid, ammonia, amines, and other nitrogen-containing compounds can be removed extremely efficiently. Can be removed easily. The reason for this is that butyric acid, isovaleric acid,
For deodorizing lower fatty acids such as caproic acid,
The strength of the basic properties of the powder solid surface plays a major role.
Porous hollow and spherical fine particles of alkaline earth metal silicates and carbonates, such as magnesium silicate, calcium silicate, and calcium carbonate, have a large specific surface area and a basic strength of +9.3 < H _- < +15. .0
It is thought that due to this basic property, lower fatty acids, which are acids, undergo a neutralization reaction on the solid surface and are deodorized. In addition, when deodorizing amines such as ammonia, trimethylamine, and other nitrogen-containing compounds, these malodorous molecules are adsorbed to form a monomolecular layer on the solid surface, so powder The size of the specific surface area is strongly involved, and the size ranges from 100 m ² /g to 800 m ² /g, such as porous hollow and spherical particles of silica.
Powder having such a huge specific surface area adsorbs malodorous molecules onto its solid surface, resulting in effective deodorization. Therefore, porous hollow spherical fine particles that are composed mainly of an inorganic substance selected from silicates and carbonates of alkaline earth metals or silica and exhibit an almost perfect spherical shape with a particle size of 0.3 μm to 10 μm are used. The powder deodorant contained as an active ingredient is considered to have an extremely effective deodorizing effect against the bad odors of lower fatty acids, ammonia, and amines. The composition of the present invention may be used as a powder as it is, or may be used as a powder spray type, that is, in a container filled with the composition along with a propellant such as chlorofluorocarbon gas, and as an aerosol type. [Examples, effects] Next, according to production examples and examples of compositions,
Although the present invention will be explained in detail, the present invention is not limited to the production examples and examples shown below. Production example Production example 1 No. 1 sodium silicate 500g/100ml aqueous solution
and 3wt% of nonionic surfactant (a mixture of polyoxyethylene sorbitan monooleate and sorbitan monostearate in a 1:1 weight ratio)
Mix with 500ml of toluene solution and stir vigorously using an emulsifier to create an emulsion. The above emulsion was added to 2000 ml of a 1 mol/magnesium chloride aqueous solution with stirring, and after continuous stirring for 20 minutes, it was left to stand for 2 hours. Then, the particles were sedimented by centrifugation, the toluene and the aqueous solution were separated, and the aqueous solution was filtered. , washed with water, washed with alcohol, and dried to obtain 29.6 g of porous hollow spherical fine particles containing magnesium silicate as the main component. This has a particle size of 0.5μm to 8μm.
m, specific surface area 270.3m ² /g, base strength +9.3<H _- <
It showed +15.0. Production example 2 500g of No. 1 sodium silicate/100ml of aqueous solution
and 2wt% of a nonionic surfactant (a mixture of polyoxyethylene sorbitan monooleate and sorbitan monostearate at a weight ratio of 1:2)
Mix with 400ml of toluene solution and stir vigorously using an emulsifier to create an emulsion. The above emulsion was added to 1500 ml of a 1 mol calcium chloride aqueous solution with stirring, followed by stirring for 20 minutes, and the procedure was repeated in the same manner as in Production Example 1, with a particle size of 0.3 μm to 7 μm and a specific surface area of 103.71 m ² / g, base strength +9.3
63.9 g of porous hollow spherical fine particles containing calcium silicate as a main component with <H _- <+15.0 were obtained. Production Example 3 50 g of porous hollow spherical fine particles containing calcium silicate as a main component obtained in Production Example 2 above are moistened with ethanol, 500 ml of 3N hydrochloric acid is added, and the mixture is left for 12 hours. Next, it is filtered, washed with water, and dried to obtain particles whose main component is silica with a diameter of 0.3 μm to 7 μm and a specific surface area of 561.8 m ² /
38.1 g of porous hollow spherical fine particles were obtained. Production Example 4 100 ml of a 3 mol/aqueous sodium carbonate solution and 200 ml of a 1.5 wt% toluene solution of a mixture of polyoxyethylene sorbitan monooleate and sorbitan monostearate (mixing weight ratio: 1:2) were mixed, and the mixture was mixed with an emulsifying machine. Stir vigorously to create an emulsion. The above emulsion was added to 1500 ml of a 0.4 mol/aqueous calcium chloride solution with stirring, followed by stirring for 20 minutes.
from 10μm, specific surface area 5.0m ² /g, base strength +9.3
29.5 g of porous hollow spherical fine particles containing calcium carbonate as a main component with <H _- <+15.0 were obtained. Production example 5 500g of No. 1 sodium silicate/100ml of aqueous solution
and 300 ml of a 3 wt % toluene solution of a 1:1 mixture of polyoxyethylene sorbitan monooleate and sorbitan monostearate are mixed and vigorously stirred using an emulsifier to form an emulsion. Add the above emulsion to 1 mol/ammonium sulfate aqueous solution 1000
ml with stirring, continue stirring for 1 hour,
Leave it for 24 hours. Hereinafter, in the same manner as in Production Example 1, starting from a particle size of 0.5 μm.
19.1 g of porous hollow spherical fine particles containing silica as a main component and having a specific surface area of 542.5 m ² /g and a diameter of 8 μm were obtained. Examples Example 1 100 mg or 200 mg of the deodorant shown in Table 1 is placed in a 50 ml Erlenmeyer flask, a filter paper impregnated with 10 μm of butyric acid is placed in the flask, and the flask is immediately sealed. (vaporizes bad odors,
After 30 minutes, the headspace gas in the container was collected using a 5 ml syringe and subjected to gas chromatography (GC).
I typed it in and analyzed it. The odor removal rate was determined as follows. Bad odor removal rate (%) = [1- When adding deodorant
Amount of bad odor detected by GC/Amount of bad odor detected by GC when no deodorant was added] x 100 The results are shown in Table 1.

[Table] Example 2 Deodorant 100mg, 200mg or 300mg shown in Table 2
Take mg of trimethylamine in a 50ml Erlenmeyer flask and
Add filter paper impregnated with 15 mg and immediately seal. After 5 minutes had elapsed, the head space gas in the container was collected using a 5 ml syringe, and analyzed by entering it into a gas chromatography (GC) to determine the malodor removal rate in the same manner as in Example 1. The results are shown in Table 2.

[Table] Example 3 1.5 g of porous hollow spherical fine particles containing calcium carbonate as the main component or basic aluminum chloride obtained in Production Example 4 were mixed with fluorocarbon gases (Freon 11 [trichlorofluoromethane] and Freon 12 [dichlorodifluoromethane]). A small powder spray container was made by filling a container with 48.5 g of 3:7 mixed gas). Using this spray container, the contents are sprayed for 1 to 2 seconds onto a filter paper pre-soaked with 1 mg of isovaleric acid, and the odor strength before and 20 minutes after spraying is determined by olfactory sense by 20 panelists. did. The results are shown in Table 3.

【table】

Claims (1)

[Scope of Claims] 1. A porous, hollow, spherical material whose main component is silica or an inorganic substance selected from silicates and carbonates of alkaline earth metals, and which exhibits an almost perfect spherical shape with a particle size of 0.3 μm to 10 μm. A powder deodorant characterized by containing fine particles as an active ingredient. 2 Porous hollow spherical fine particles are composed of silica as a main component, and have a particle size of 0.3 μm to 10 μm and a diameter of 100 μm.
The powder deodorant according to claim 1, which has a specific surface area of from m ² /g to 800 m ² /g. 3. The powder deodorant according to claim 1, wherein the inorganic substance is selected from magnesium silicate, calcium silicate, and calcium carbonate.