JP2006298804A - Aerosol composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aerosol composition that can decrease the secretions of, for example, perspiration, sebum or the like that can be decomposed by the microorganism on the skin surface to generate unpleasant body smell by applying the composition to the skin to develop the anti-perspiration action and continue the effect. <P>SOLUTION: The aerosol composition comprises following (A) component, (B) component and (C) component: (A) component: a water-soluble aluminum salt; (B) component: a fatty acid that is liquid at the normal temperature and (C) component: polyol. In an embodiment, as (A) component, can be cited at least one selected from chlorohydroxy aluminum, chlorohydroxy aluminum/zirconium, and sulfate aluminum ammonium. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an aerosol composition, and more particularly to an aerosol composition that exhibits an antiperspirant effect quickly and is excellent in its sustainability.

  Conventionally, an antiperspirant deodorant has been used to reduce the stickiness and discomfort of the skin due to sweat. A refreshing feeling of use is preferred due to the hot and humid climate in Japan, and aerosol type antiperspirants are widely used due to its refreshing feeling.

  Such an aerosol type antiperspirant composition usually has a liquefied volatile propellant, an active ingredient dispersed therein, and a spreading agent for adhering these ingredients onto the skin. Contains oil. The antiperspirant mechanism uses a convergent aluminum compound to suppress perspiration due to its astringent action.

  On the other hand, as a conventional antiperspirant composition, for example, it consists of a powdery water-soluble antiperspirant active ingredient, powder, silicone, a stock solution containing polyhydric alcohols, and a propellant. Non-aqueous powder aerosol type antiperspirant composition (for example, refer to Patent Document 1 by the applicant of the present application), skin cosmetic antiperspirant component, menthol and menthol derivative, and polyhydric alcohol Skin cosmetics (see, for example, Patent Document 2 by the applicant of the present application), further, component A: a water-soluble hydroxycarboxylic acid and / or a water-soluble aluminum salt, and component B: a fatty acid that is liquid at room temperature. Deodorant compositions (see, for example, Patent Document 3 by the present applicant) are known.

However, the non-aqueous powder aerosol type antiperspirant compositions and skin cosmetics described in Patent Documents 1 and 2 have excellent antiperspirant / deodorant effects, but have a slightly sustained antiperspirant / deodorant effect. However, the deodorant composition described in Patent Document 3 has an antiperspirant effect that has never been seen before, but the immediate effect of the antiperspirant effect is slightly insufficient. In addition, there is a problem, and the appearance of an aerosol-type antiperspirant excellent in immediate effect and sustainability of the antiperspirant effect is desired.
JP-A-11-246378 (Claims, Examples, etc.) JP 2003-73248 A (Claims, Examples, etc.) JP-A-2004-300132 (Claims, Examples, etc.)

  The present invention is to solve this problem in view of the above-mentioned problems of the prior art and the current situation, and develops an antiperspirant effect immediately after the preparation is applied and maintains the effect to maintain the normal skin condition. An object of the present invention is to provide an aerosol composition that reduces the amount of secretions such as sweat and sebum decomposed by bacteria and suppresses unpleasant body odor.

As a result of intensive studies to solve the above-described conventional problems, the present inventor contains at least a specific antiperspirant component, a specific fatty acid, and a specific component that exhibits an antiperspirant effect immediately after the preparation is applied. As a result, the inventors have found that the above-mentioned aerosol composition can be obtained, and have completed the present invention.
That is, the aerosol composition of the present invention is characterized by containing the following component (A), component (B) and component (C).
(A) Component: Water-soluble aluminum salt (B) Component: Fatty acid liquid at normal temperature (C) Component: Polyol

  According to the present invention, an antiperspirant effect is exhibited immediately after application of the preparation, and the effect is maintained, thereby reducing the amount of secretions such as sweat and sebum decomposed by the skin resident bacteria, and unpleasant body odor. An aerosol composition is provided that inhibits

Hereinafter, embodiments of the present invention will be described in detail.
The aerosol composition of the present invention comprises a water-soluble aluminum salt [component (A)], a fatty acid [component (B)] that is liquid at room temperature, and a polyol [component (C)]. Is.

The component (A) used in the present invention needs to be a water-soluble aluminum salt.
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 (A) components, when a water-soluble aluminum salt is used alone or in combination, the content thereof is 5 to 40% by mass with respect to the total amount of the aerosol composition (stock solution composition) excluding the propellant. (Hereinafter, simply referred to as “%”) is preferable, and 5 to 30% is more preferable.
If the content of the component (A) is less than 5%, the antiperspirant effect cannot be sufficiently exerted. On the other hand, if it exceeds 40%, the feeling of use such as stickiness is reduced, skin irritation, etc. There are concerns.

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 that are liquid at room temperature as the component (B) is preferably 1 to 10%, more preferably 1%, based on the total amount of the aerosol composition (stock solution composition) excluding the propellant. It is desirable to set it to -7%.
When the content of the component (B) is less than 1%, the effect of the present invention cannot be exhibited. On the other hand, when the content exceeds 10%, there is a concern about fatty acid irritation to the skin.

The component (C) used in the present invention needs to be a polyol.
Examples of the polyol that can be used include glycols such as propylene glycol, dipropylene glycol, ethylene glycol, diethylene glycol, 1,3-butylene glycol, isoprene glycol, and hexylene glycol, sugar alcohols such as glycerin and sorbitol, and polyethylene glycol. Examples include polyethylene glycol having a weight average molecular weight of 200 to 10,000, such as 300, polyethylene glycol 400, polyethylene glycol 1500, polyethylene glycol 4000, and polyethylene glycol 6000. Among these, propylene glycol, dipropylene glycol, 1,3-butylene glycol, polyethylene glycol 300, and the like are more preferable from the viewpoint of stability.
In the present invention, the component (C) can be used alone or in combination of two or more.

The content of the polyol as the component (C) is preferably 0.01 to 20%, more preferably 1 to 5% with respect to the total amount of the aerosol composition (stock solution composition) excluding the propellant. It is desirable.
When the content of the component (C) is less than 0.01%, it may be difficult to make the antiperspirant effect sufficiently early. On the other hand, when the content exceeds 20%, the feeling of use such as stickiness may occur. Decrease.

In the present invention, in addition to the component (A), the component (B) and the component (C), examples of the propellant that becomes an aerosol component include hydrocarbon gases such as propane, isobutane, normal butane, isopentane, and neopentane. (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.
The content of these propellants varies depending on the structure of the aerosol container, the use of the aerosol composition, the use site, etc., but the blend ratio of the stock solution composition: the propellant is the content ratio (mass basis), The ratio is preferably 0.1: 99.9 to 30:70, more preferably 1:99 to 30:70, and particularly preferably 1:99 to 15:85.

In addition to the components (A), (B) and (C) described above, the aerosol composition of the present invention includes components (arbitrary) commonly used in aerosol compositions within a range that does not impair the present invention. Component) can be contained as appropriate.
Examples of optional components that can be used in the present invention include water-soluble hydroxycarboxylic acids, oils and fats, waxes, silicones, antioxidants, organic powders, inorganic powders, surfactants, fragrances, preservatives, Examples include ultraviolet absorbers, chelating agents, humectants, thickeners, cooling agents, bactericides, anti-inflammatory agents, amino acids, plant extracts, and inclusion compounds.

  Specifically, citric acid, malic acid, tartaric acid, 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, calcium alginate powder (secondary aggregate), deodorant powder such as apatite powder, preservatives such as methylparaben, ethylparaben, sodium benzoate, ethanol, bentonite, stearyl glycyrrhetinate Skin protectants such as glycerin, hyaluronic acid, urea and other moisturizers, aloe extract, eucalyptus extract, mulberry extract, birch extract and other plant extract extracts, hydroxypropylcellulose, hydroxymethylcellulose and other viscosity modifiers, urocanic acid, paraaminobenzoic acid Acid, paramethoxy cinnamon Isopropyl, ultraviolet absorbers such as hydroxy methoxy benzophenone, antioxidants such as tocopherol, pigments, perfumes and the like.

  In the aerosol composition of this invention comprised in this way, the water-soluble aluminum salt which is (A) component is made to converge skin, the antiperspirant effect is exhibited, and (B) at the normal temperature which is hardly soluble in the water of component By containing the liquid fatty acid, the fatty acid gradually dissolves, so that it gradually dissolves on the skin and can maintain its pH (acidity) for a long time. In addition, by containing the polyol (C), (A) Since the water-soluble aluminum salt, which is a component, improves the water-solubility on the skin, an immediate effect is obtained, so that the antiperspirant effect is quickly developed and the sustainability is excellent. Therefore, in the present invention, an antiperspirant effect is exhibited immediately after application of the preparation, and the effect is maintained, thereby reducing the amount of secretions such as sweat and sebum decomposed by the skin resident bacteria, and unpleasant body odor. An aerosol composition that suppresses the above will be obtained.

  EXAMPLES Next, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to the following Example etc.

[Examples 1 to 9 and Comparative Examples 1 to 3]
A stock solution composition was prepared according to the composition shown in Table 1 and Table 2 below, and an aerosol composition (formulation) was prepared using liquefied petroleum gas as a propellant.
Using each of the obtained aerosol compositions, the rapidity and persistence of the antiperspirant effect was evaluated by the following test method.
These test results are shown in Tables 1 and 2 below.

<Evaluation method of antiperspirant effect>
The measurement was performed using a skin moisture transpiration (TEWL) measuring device (manufactured by Tewmeter TM210 CK electronic).
A 2 cm × 2 cm frame was formed on the inner side of the forearm, and the preparation was sprayed into the frame for 2 seconds from a position 10 cm away from the skin. 10 healthy male panelists aged 25 to 40 years old until they show constant sweating under high temperature conditions (room temperature 28 ° C. or higher), and the average impedance of the application site with respect to the average impedance value of the non-application site at that time shown by the following formula The antiperspirant effect was determined by the value, the average of the antiperspirant effect (%) of 10 persons was determined, and the average value was evaluated according to the following evaluation criteria.
Antiperspirant effect (%) = {100− (average impedance value of application site / average impedance value of non-application site)} × 100
<Evaluation criteria>
◎: 60% or more ○: 30% or more and less than 60% △: 10% or more and less than 30% ×: less than 10%

As is apparent from the results of Tables 1 and 2, Examples 1-9, which are within the scope of the present invention, exhibit an antiperspirant effect faster than Comparative Examples 1-3, which are outside the scope of the present invention. In addition, it has been found that the durability is excellent.
In contrast, it has been found that an aerosol composition that does not include any one or more of the component (A), the component (B), and the component (C) of the present invention cannot exhibit the effects of the present invention.

Claims (2)

An aerosol composition comprising the following component (A), component (B) and component (C):
(A) Component: Water-soluble aluminum salt (B) Component: Fatty acid liquid at normal temperature (C) Component: Polyol The aerosol composition according to claim 1, wherein the component (A) is at least one selected from chlorohydroxyaluminum, chlorohydroxyaluminum / zirconium, and aluminum ammonium sulfate.