JP4293883B2 - Deodorant composition - Google Patents

Description

  The present invention relates to a deodorant composition, and more particularly, to a deodorant composition suitable for skin that has an excellent deodorizing effect and excellent durability.

In general, body odors such as snoring, sweat odor, and foot odor are not only for the person, but also for the people around them, and this is a very psychological and mental burden for those with body odor. .
One of the causes of body odor is considered to be caused by decomposition of secretions such as sweat and sebum by skin resident bacteria.

  Conventionally, various deodorant agents of various dosage forms have been marketed to reduce these body odors, but most of them are fungicides that suppress the growth of skin resident bacteria and prevent the decomposition of sweat and sebum. It uses a masking agent that masks odor using a fragrance.

However, the fungicide in the deodorant composition has been pointed out as a safety problem of the compound having the bactericidal effect, and the types and application amounts that can be used are often determined. There was a problem that the amount used was limited.
Further, the masking agent in the deodorant composition has a problem that the body odor and odor are mixed and the body odor cannot be sufficiently suppressed, or on the contrary, an unpleasant odor is generated.
Accordingly, there is a current demand for deodorant compositions that do not rely too much on these fungicides and masking agents.

On the other hand, it is said that pH is involved in one of the growth conditions of the fungus, and it has been found that the pH of the armpit of a person with a strong smell is relatively higher than that of a person with a weak smell. ing.
For this reason, antibacterial compositions useful for antibacterial substances, cosmetics containing divalent or higher organic acids having a pKa value of 4 to 7 in order to prevent the growth of bacteria and ensure the preservation of products (patents) As a method of suppressing the growth of skin resident bacteria by keeping the pH of sweat and the surface of the skin low, the pH of sweat is controlled by a mixture of a specific weak organic acid and a salt of an organic amine compound. A cosmetic deodorant composition (see Patent Document 2) characterized by maintaining a substantially constant value in the range of 3 to 6 is known.
In addition, paying attention to the fact that pH is involved in the strength of the bad smell, it contains a substance having a buffer capacity at pH 3.5 to 5.5, and the total amount of organic acid is dissolved and blended to pH 3.5 to 5.5. A deodorant (see Patent Document 3) is known.
Further, although different from the object of the present invention, as a purpose of preventing the deterioration of the color and odor of the composition, a specific astringent, suspension, low-volatility carrier liquid, organic acid such as citric acid, An aerosol-type antiperspirant composition containing a solvent and a propellant sufficient to dissolve at least part of an acid is known (see Patent Document 4).

  However, the deodorant compositions and the like described in Patent Documents 1 to 4 have a problem that they are not sufficiently satisfactory in the deodorizing effect, particularly in the sustainability of the deodorizing effect, and are still suitable for use in highly effective skin. A composition is desired.

On the other hand, kujin is the root of the leguminous clara, and this kujin extract is used as a folk medicine in Japan for insect pests, pest control, eczema, and external preparations for parasitic skin diseases. It is well known that it works.
As an antibacterial / preservative using this kujin, an antibacterial / preservative, skin cosmetics, etc. formed by blending an organic solvent extract of kudin containing Soforaflavanone G as an essential component (see Patent Documents 5 and 6) It has been known.

However, the antibacterial / preservatives, skin cosmetics, and the like described in Patent Documents 5 and 6 are merely disclosures of the antibacterial effect of Sophoraflavanone G from its cucumber extract and its use, The present invention differs from the present invention in its purpose, configuration and the like.
JP 2002-322090 A (Claims, Examples, etc.) Japanese Patent Laid-Open No. 52-102437 (Claims, Examples, etc.) JP-A-4-257514 (Claims, Examples, etc.) Japanese Patent Laid-Open No. 47-3850 (Claims, Examples, etc.) JP-A-8-73364 (Claims, Examples, etc.) JP-A-8-73372 (Claims, Examples, etc.)

  In view of the above-mentioned conventional problems and the like, the present invention is intended to solve this problem, and provides a deodorant composition suitable for skin that is excellent in deodorizing effect and excellent in its sustainability. An object of the present invention is to provide a deodorant composition that is an aerosol type from the viewpoint of ease of use and cleanliness, while further improving these effects.

  As a result of earnest research on the above-mentioned conventional problems, the present inventors have combined the specific hydroxycarboxylic acid and / or water-soluble aluminum salt with the fatty acid that is liquid at a specific room temperature to achieve the above-mentioned deodorizing effect. The present invention has been completed by finding that a deodorant composition excellent in effect and excellent in durability can be obtained.

That is, the present invention resides in the following (1) to (4).
(1) A deodorant composition comprising the following A component and B component.
A component: 0.1-10 mass% of water-soluble hydroxycarboxylic acid chosen from a citric acid, malic acid, and tartaric acid, and 5-40 mass% of water-soluble aluminum salts
B component: 1-10 mass% isostearic acid
(2) The deodorant composition according to the above (1), wherein the water-soluble aluminum salt of the component A is at least one selected from chlorohydroxyaluminum, chlorohydroxyaluminum / zirconium, and aluminum ammonium sulfate.
(3) The deodorant composition according to claim 1 or 2, further comprising a kudin flavonoid.
(4) The deodorant composition according to any one of (1) to (3), which is an aerosol type deodorant composition.

  ADVANTAGE OF THE INVENTION According to this invention, the deodorant composition excellent in the deodorizing effect and excellent in the sustainability is provided.

Hereinafter, embodiments of the present invention will be described in detail.
The deodorant composition of the present invention contains, as the first invention, a water-soluble hydroxycarboxylic acid and / or a water-soluble aluminum salt [component (A)] and a fatty acid [component (B)] that is liquid at room temperature. The second invention contains at least one organic acid selected from citric acid, malic acid, tartaric acid, succinic acid, and fumaric acid, which is not substantially dissolved, and non-soluble. It is characterized by being aqueous.
In the following, the term “present invention” includes both the first invention and the second invention.

The component (A) used in the first invention needs to be a water-soluble hydroxycarboxylic acid and / or a water-soluble aluminum salt.
Examples of the water-soluble hydroxycarboxylic acid that can be used include citric acid, malic acid, tartaric acid, lactic acid, glycolic acid, glyceric acid, and salicylic acid.
Among these, a divalent or higher water-soluble hydroxycarboxylic acid is particularly desirable from the viewpoint of low irritation.
Examples of the divalent or higher water-soluble hydroxycarboxylic acid include citric acid, malic acid, and tartaric acid.

Examples of water-soluble aluminum salts that can be used include aluminum chloride, aluminum sulfate, chlorohydroxyaluminum, bromohydroxyaluminum, chlorohydroxyaluminum / zirconium, and aluminum ammonium sulfate.
Among these, chlorohydroxyaluminum, chlorohydroxyaluminum / zirconium, and aluminum ammonium sulfate are particularly desirable from the viewpoint of low irritation.
In the present invention, the component (A) can be used alone or in combination of two or more.

Among these components (A), when a water-soluble hydroxycarboxylic acid is used alone or in combination, the content is the total amount of the deodorant composition (however, the total amount of the stock solution excluding the propellant in the aerosol composition, Similarly, it is preferably 0.1 to 10% by mass (hereinafter simply referred to as “%”), and more preferably 0.1 to 5%.
If the content of the water-soluble hydroxycarboxylic acid is less than 0.1%, a sufficient effect for lowering the pH cannot be obtained, and if it exceeds 10%, the skin irritation due to excessive decrease in the pH of the skin. Is concerned.
In addition, when the water-soluble aluminum salt is used alone or in combination among the components (A), the content is preferably 5 to 40%, more preferably, based on the total amount of the deodorant composition. 5 to 30% is desirable.
When the content of the water-soluble aluminum salt is less than 5%, a sufficient effect as an antiperspirant cannot be obtained, and when it exceeds 40%, there is a concern that the feeling of use such as stickiness may be reduced and skin irritation may occur. is there.

The component (B) used in the present invention needs to be a fatty acid that is liquid at room temperature (25 ° C., the same applies hereinafter).
Examples of fatty acids that are liquid at room temperature include isostearic acid, oleic acid, linoleic acid, and linolenic acid.
Among these, isostearic acid is preferable from the viewpoint of odor.
In the present invention, the component (B) can be used alone or in combination of two or more.

The content of these fatty acids which are liquid at room temperature as the component (B) is preferably 1 to 10%, more preferably 1 to 7%, based on the total amount of the deodorant composition.
If the content of the component (B) is less than 1%, a sufficient effect for maintaining the pH cannot be obtained, and if it exceeds 10%, there is a concern about fatty acid irritation to the skin.

In addition to the components (A) and (B), the deodorant composition of the first invention includes components (arbitrary components) commonly used in the deodorant composition within a range not impairing the effects of the present invention. Can be contained.
Examples of optional components that can be used in the present invention include fats and oils, waxes, silicones, antioxidants, organic powders, inorganic powders, surfactants, fragrances, preservatives, ultraviolet absorbers, and chelating agents. , Moisturizers, thickeners, cooling agents, bactericides, anti-inflammatory agents, amino acids, plant extracts, inclusion compounds and the like.
Specifically, nylon powder, polyethylene powder, silicic anhydride, silicone powder, cellulose powder, talc, kaolin, mica, and other usability improving powders, porous magnesia silica powder, synthetic layered magnesium pyrosilicate powder , Deodorizing powder such as calcium alginate powder (secondary aggregate), apatite powder, antiseptic such as methylparaben, ethylparaben, sodium benzoate, ethanol, skin protective agent such as bentonite, stearyl glycyrrhetinate, glycerin , Moisturizers such as hyaluronic acid and urea, plant extract extracts such as aloe extract, eucalyptus extract, mulberry extract, birch extract, viscosity modifiers such as hydroxypropylcellulose, hydroxymethylcellulose, urocanic acid, paraaminobenzoic acid, paramethoxycinnamic acid Isopropyl, hydroxy Butoxy ultraviolet absorbers such as benzophenone, antioxidants tocopherol etc., pigments, perfumes and the like.

The deodorant composition of the first invention can take forms such as a roll-on type, a mist spray type, a lotion type, a cream type, a sheet type, a foam type, a liquid type, a stick type, and an aerosol type in accordance with the application. However, it is not limited to these.
From the viewpoint of ease of use and cleanliness, it is preferable to use an aerosol type, and in the case of this aerosol type, as a propellant, hydrocarbon gas such as propane, isobutane, normal butane, isopentane, neopentane, etc. (LPG) and liquefied gas such as dimethyl ether (DME) can be used. In addition to these, carbon dioxide gas and nitrogen gas may be used. Said propellant can be used individually or in mixture of 2 or more types, respectively.

  In the deodorant composition of the first invention constituted as described above, the water-soluble hydroxycarboxylic acid and / or the water-soluble aluminum salt as the component (A) can immediately lower the pH of sweat or skin surface and effectively reduce the fungus. Growth is inhibited, and the fatty acid is gradually dissolved by the combined use of a fatty acid which is hardly soluble in water of component (B) at room temperature, so that it gradually dissolves on the skin and maintains its pH (acidity) for a long time. It can be maintained. As a result, it is possible to obtain a deodorant composition suitable for long-lasting skin and the like by suppressing the growth of skin resident bacteria for a long time.

Next, the deodorant composition of the second invention contains at least one organic acid selected from citric acid, malic acid, tartaric acid, succinic acid, and fumaric acid that is not substantially dissolved, and is non-aqueous. It is characterized by being.
The organic acid selected from citric acid, malic acid, tartaric acid, succinic acid, and fumaric acid used in the second invention is contained as a powder in the composition from the viewpoint of further sustaining the deodorizing effect. .
The citric acid used in the second invention may be either anhydrous citric acid or citric acid monohydrate, but anhydrous citric acid is preferred in terms of moisture absorption.

The average particle diameter of these organic acids is preferably 1 to 75 μm, and more preferably 1 to 45 μm.
If the average particle diameter exceeds 75 μm, spraying of the contents from the aerosol spray may cause poor spraying or may cause pain when hitting the skin. In addition, when an average particle diameter is less than 1 micrometer, it takes time for crushing of an organic acid, and is not preferable.
Examples of a method for pulverizing these organic acids include spray drying and pulverization. Although pulverization can be obtained by grinding in a mortar, it can be obtained using a machine such as a ball mill, a spiral mill, a jet mill, or a grinder.

The content of the organic acid powder is preferably 0.1 to 10%, more preferably 0.1 to 5%, based on the total amount of the deodorant composition.
When the content of the organic acid powder is less than 0.1%, the effect is poor, and when the content exceeds 10%, the pH of the skin becomes extremely acidic, and there may be skin irritation in some cases. is there.

  The deodorant composition of the second aspect of the present invention is non-aqueous from the point of extending the durability of the deodorizing effect for a long time, and is not particularly limited as long as it is non-aqueous. Aerosol type, stick type, oily gel It can be non-aqueous depending on the type.

The deodorant composition of the second invention can contain the above-mentioned components (arbitrary components) commonly used in the deodorant composition within the range not impairing the effects of the present invention, in addition to the above-described components. .
Moreover, since the deodorant composition of this 2nd invention is a non-aqueous system, it can take forms, such as an aerosol type, a stick type, and an oil-based gel type. When the aerosol type is used, each of the above-described propellants can be used as the propellant.
In particular, the deodorant composition of the present invention 2 is preferably a non-aqueous aerosol type from the viewpoint of ease of use and cleanliness.

  The deodorant composition of the present invention thus configured is non-aqueous, and at least one organic acid selected from citric acid, malic acid, tartaric acid, succinic acid, and fumaric acid exists as a powder, When this composition is used in, for example, an aerosol spray type, an organic acid such as citric acid is present as a powder in a non-aqueous aerosol, and when sprayed, the citric acid and the like remain in powder (solid) on the skin. It dissolves with moisture on the skin such as sweat, lowers the pH of the skin surface to inhibit the growth of bacteria, and exhibits its deodorizing effect for a long time. In addition, in the case of an organic acid dissolved in advance, the pH is immediately lowered, but in the case of the second invention, it exhibits a further excellent deodorizing effect in terms of sustainability. .

  The deodorant composition of the present invention (the first invention and the second invention) is excellent in deodorizing effect and excellent in its sustainability as described above, but has a further deodorizing effect and its sustainability. From the point of further improving the synergisticity, it is preferable to contain a kudin flavonoid from which a kudin extract or the like can be obtained.

Since the kudin flavonoid to be used shows weak acidity, it contributes to the fall of pH like citric acid etc. Furthermore, it has a bactericidal action. For this reason, when a kudin flavonoid is included in the deodorant composition of the first invention and the second invention, the growth of bacteria is further suppressed in a synergistic manner, and the deodorizing effect, particularly its sustainability, is further improved.
The content of this kudin flavonoid is 0.0001 to 10%, more preferably 0.001 to 5%, based on the total amount of the deodorant composition.
If the content of this kudin flavonoid is less than 0.0001%, a further effect cannot be exhibited, and if it exceeds 10%, the coloration peculiar to the flavonoid may impair the appearance of the product.

  EXAMPLES Next, although an Example and a comparative example are given and this invention is demonstrated more concretely, this invention is not restrict | limited to the following Example. In addition,% in the following table | surface is the mass% and is 100% of the whole quantity.

[Examples 1-4 and Comparative Examples 1-4, and Reference Example (first invention)]
An aerosol-type skin deodorant composition having the composition (stock solution) shown in Table 1 below was prepared.
About the obtained deodorant composition, skin pH and the deodorizing effect were evaluated by the following methods.
These results are shown in Table 1 below.

(Measurement method of skin pH)
An appropriate amount of a sample was applied to the axilla of 20 male and female subjects, and the pH of the eyelids was measured immediately after application, 4 hours, and 8 hours later with a pH meter (pH meter D-21, manufactured by Horiba, Ltd.). In the case of an aerosol type, spraying was performed for 2 seconds.

(Evaluation method of deodorizing effect)
Apply the appropriate amount of sample to one axilla part of 20 male and female subjects, do not treat anything on the other axilla, and then put 10 shirts sewn with pre-washed gauze on the axilla part. Was worn for 4 hours and the remaining 10 subjects were worn for 8 hours.
A specialized panelist sensory-evaluated the body odor adhering to the gauze based on the following evaluation criteria. In the case of an aerosol type, spraying was performed for 2 seconds.
<Evaluation criteria>
3 points: Very better than the uncoated part (no odor)
2 points: considerably better than the uncoated part (no odor)
1 point: Slightly better than uncoated area (no odor)
0 point: Equivalent to the uncoated part ◎: Average score of 10 subjects is 2.5 or more ○: Average score of 10 subjects is 2 or more Δ: Average score of 10 subjects is 1 or more 2 Less than point ×: The average score of 10 subjects is less than 1 point

  As is clear from the results of Table 1 above, in the aerosol type deodorant composition, Examples 1 to 4 within the scope of the present invention are more effective in deodorizing than Comparative Examples 1 to 4 outside the scope of the present invention. It was found to be excellent and durable.

[Examples 5 to 8 and Comparative Examples 5 to 7, first invention]
Deodorant compositions for stick-type skin (Examples 5-6, Comparative Examples 5-6) to be the composition (stock solution) shown in Table 2 and Table 3 below, deodorant compositions for roll-on skin (Examples) 7-8, Comparative Example 7) were prepared.
About the obtained deodorant composition, skin pH and the deodorizing effect were evaluated by said each method.
These results are shown in Tables 2 and 3 below.

  As is clear from the results of Tables 2 and 3 above, in the stick-type and roll-on type deodorant compositions, Examples 5 to 8 which are within the scope of the present invention are compared with Comparative Examples 5 to 7 outside the scope of the present invention. In comparison, it was found that the deodorizing effect was excellent and the sustainability was also excellent.

[Example 9 and Comparative Examples 8 to 9 (second invention)]
An aerosol-type deodorant composition for skin having a composition (stock solution) containing organic acid powders (each average particle diameter) shown in Table 4 below was prepared.
About the obtained deodorant composition, skin pH and the deodorizing effect were evaluated by said each method.
These results are shown in Table 4 below.

  As is clear from the results of Table 4 above, in the aerosol type deodorant composition, Example 9 which is within the scope of the present invention has an excellent deodorizing effect as compared with Comparative Examples 8 to 9 outside the scope of the present invention. It was also found that the durability was excellent.

[Examples 10 to 15 (second invention)]
A non-aqueous aerosol type deodorant composition for skin having a composition (stock solution) containing organic acid powders (each average particle size) shown in Table 5 below was prepared.
About the obtained deodorant composition, skin pH and the deodorizing effect were evaluated by said each method.
These results are shown in Table 5 below.

  As is clear from the results in Table 5 above, it was found that Examples 10 to 15 of the present invention, which are non-aqueous aerosol type deodorant compositions, were excellent in deodorizing effect and excellent in sustainability.

Claims (4)

The deodorant composition characterized by containing the following A component and B component.
A component: 0.1-10 mass% of water-soluble hydroxycarboxylic acid chosen from a citric acid, malic acid, and tartaric acid, and 5-40 mass% of water-soluble aluminum salts
B component: 1-10 mass% isostearic acid   The deodorant composition according to claim 1, wherein the water-soluble aluminum salt of component A is at least one selected from chlorohydroxyaluminum, chlorohydroxyaluminum / zirconium, and aluminum ammonium sulfate.   Furthermore, the deodorant composition of Claim 1 or 2 containing a kudin flavonoid.   It is an aerosol dosage form deodorant composition, The deodorant composition as described in any one of Claims 1-3.