JP2022144479A - Body odor inhibitor - Google Patents

Abstract

To provide a body odor inhibitor that barely causes unnatural whiteness after applied to skin while containing titanium oxide-coated activated carbon.SOLUTION: A body odor inhibitor contains a component (A): titanium oxide-coated activated carbon, a component (B): ethanol, and a component (C): a tetraester of a C8-22 fatty acid and pentaerythritol. The content of the component (A) is 0.05-5.0 mass%, the content of the component (B) is 40.0-90.0 mass%, and the content of the component (C) is 0.05-10.0 mass%.SELECTED DRAWING: None

Description

The present invention relates to body odor control agents.

Body odors such as armpit odor, foot odor, and sweat odor are mainly caused by a mixture of sweat and sebum, which are decomposed by skin indigenous bacteria. In order to suppress such body odors, it has been proposed to use, as a deodorizing component, titanium oxide-coated activated carbon obtained by coating activated carbon with titanium oxide, which has an excellent deodorant function (for example, Patent Document 1).

WO2019/187214

A body odor suppressant containing titanium oxide-coated activated carbon sometimes causes a phenomenon in which a white residue remains after the body odor suppressant is applied to the skin and dried (so-called whitening).

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a body odor suppressant that contains titanium oxide-coated activated carbon and is less likely to cause whitening after being applied to the skin.

As a result of intensive studies to achieve the above object, the present inventors found that component (A): titanium oxide-coated activated carbon, component (B): ethanol, and component (C): fatty acid having 8 to 22 carbon atoms and pentaerythritol. According to the body odor suppressant containing a tetraester of and the content ratio of components (A) to (C) each within a specific range, while containing titanium oxide-coated activated carbon, whitening after application to the skin I found that it is difficult to occur. The present invention has been completed based on these findings.

That is, the present invention contains the following component (A), the following component (B), and the following component (C),
The content of component (A) is 0.05 to 5.0% by mass,
The content of component (B) is 40.0 to 90.0% by mass,
Provided is a body odor suppressant containing component (C) in an amount of 0.05 to 10.0% by mass.
Component (A): Titanium oxide-coated activated carbon Component (B): Ethanol Component (C): Tetraester of fatty acid having 8 to 22 carbon atoms and pentaerythritol

Component (C) is preferably pentaerythrityl tetraethylhexanoate.

Preferably, the body odor control agent is a non-emulsifying composition.

Preferably, the body odor suppressant does not contain a surfactant, or the content of the surfactant is 1.0% by mass or less.

Although the body odor suppressant of the present invention contains titanium oxide-coated activated carbon, it hardly causes whitening after being applied to the skin.

The body odor suppressant of the present invention contains at least titanium oxide-coated activated carbon, ethanol, and a tetraester of a fatty acid having 8 to 22 carbon atoms and pentaerythritol. In the present specification, titanium oxide-coated activated carbon is referred to as "component (A)", ethanol as "component (B)", and a tetraester of fatty acid having 8 to 22 carbon atoms and pentaerythritol as "component (C)". They may be called respectively.

That is, the body odor deterrent of the present invention contains at least component (A), component (B), and component (C). The body odor suppressant of the present invention may contain components other than the above components (A) to (C). In addition, each component contained in the body odor depressant of the present invention, for example, each component such as component (A), component (C), and other components, may be used alone or in combination of two or more. may be used.

[Component (A)]
Component (A) is titanium oxide-coated activated carbon. Component (A) exhibits a remarkably superior body odor suppressing effect as compared with deodorant components used in conventional body odor suppressants. In addition, the body odor suppressant of the present invention can further exhibit the body odor suppressing effect by further containing other antiperspirants and bactericides. Only 1 type may be used for a component (A), and 2 or more types may be used for it.

Component (A) is a composite having a structure in which titanium oxide exists on the surface of activated carbon. More specifically, in component (A), titanium oxide is present on the surface of the activated carbon. That is, component (A) has a structure in which activated carbon is coated with titanium oxide. In component (A), the entire surface of the activated carbon may be coated with titanium oxide, or only a portion of the surface of the activated carbon may be coated with titanium oxide.

Component (A) contains at least activated carbon and titanium oxide present on the surface of the activated carbon, and may contain components other than activated carbon and titanium oxide (eg, resin, metal salt, etc.). Activated carbon, titanium oxide, and components other than these may each be used singly or in combination of two or more.

The activated carbon is not particularly limited, but a porous carbonaceous material (for example, powdered activated carbon) is preferable. Activated carbon may contain, in addition to carbon, hydrogen, oxygen, inorganic components, and the like, as constituent elements.

The raw material for activated carbon is not particularly limited, and those commonly used as raw materials for activated carbon can be used. Specific examples include coconut shells, wood, sawdust, coal, phenolic resin, rayon, acrylonitrile, coal pitch, and petroleum pitch. Among them, coconut shell, wood, phenolic resin, and coal are preferred.

The average particle size of the activated carbon is not particularly limited, but is preferably 15.0-50.0 μm, more preferably 18.0-45.0 μm, still more preferably 20.0-42.0 μm. The average particle size means the average particle size of the entire activated carbon constituting the titanium oxide-coated activated carbon, and can be measured by a commercially available laser diffraction/scattering particle size distribution analyzer. When the average particle size is within the above range, the titanium oxide-coated activated carbon becomes white, so when the body odor suppressant according to the present embodiment is applied, the skin or the like to be applied may be stained black (hereinafter, " There is no "coating stain"), the effect of suppressing body odor is more excellent, and the feeling of use is also excellent. Further, when the average particle diameter is 15.0 μm or more, the amount of titanium oxide to be coated can be suppressed, and it becomes easy to achieve both the effect of preventing stains on the coating and the effect of suppressing body odor. When the average particle diameter is 50.0 μm or less, clogging of the nozzle can be prevented when the body odor suppressant is filled in a spray container and used. In addition, roughness can be further suppressed, and the feeling of use is excellent.

The central pore diameter of the activated carbon is not particularly limited, but is preferably 0.1 to 10.0 nm, more preferably 0.5 to 2.0 nm, from the viewpoint of improving the adsorption capacity of the component (A) and improving the effect of suppressing body odor. 0 nm. The central pore diameter of activated carbon can be measured by the BET method using, for example, a pore size distribution analyzer "Belsorp" manufactured by Bell Japan Co., Ltd.

The amount of iodine adsorbed by the activated carbon is not particularly limited, but is preferably 100 to 3000 mg/g, more preferably 500 to 2000 mg/g, from the viewpoint of improving the adsorption capacity of component (A) and improving the effect of suppressing body odor. In this specification, the iodine adsorption amount of activated carbon can be measured by a titration method based on JIS K 1417.

Activated carbon can be produced by a known production method. For example, it can be produced by a known method of pulverizing and classifying activated carbon. Moreover, the activated carbon can also use a commercial item. Examples of commercial products include, but are not particularly limited to, trade name "Taiko A" (manufactured by Futamura Chemical Co., Ltd.).

Titanium oxide is not particularly limited, and known titanium oxide (titanium dioxide) can be used. Examples of titanium oxide include, but are not particularly limited to, rutile, anatase, and brookite titanium oxides.

Although the average particle size of titanium oxide is not particularly limited, it is preferably 0.001 to 1.0 μm, more preferably 0.01 to 0.5 μm, still more preferably 0.1 to 0.4 μm, and particularly preferably 0.01 to 0.5 μm. 2 to 0.3 μm. When the average particle size is within the above range, the effect of making the component (A) white is enhanced, so that the effect of preventing smudges caused by coating is further enhanced.

The above-mentioned "average particle size of titanium oxide" means the average particle size of the entire titanium oxide that constitutes the component (A). Further, in the present specification, the average particle size (equivalent sphere size) of titanium oxide can be calculated from the specific surface area measured by the BET method (or simplified BET method).

A commercially available titanium oxide can be used. Examples of commercially available products include, but are not limited to, “Tipaque CR-50” manufactured by Ishihara Sangyo Co., Ltd. and “MT-700B” manufactured by Tayca Corporation.

Examples of resins that component (A) may contain include polyester resins, acrylic resins, urethane resins, vinyl acetate resins, ethylene-vinyl acetate resins, epoxy resins, silicone resins, polystyrene resins, and cellulose resins. Among them, acrylic resins (in particular, water-based acrylic resins) are preferred, and examples thereof include alkyl acrylate copolymers.

The content of titanium oxide in component (A) is not particularly limited, but is preferably 10 to 10,000 parts by mass, more preferably 100 to 5,000 parts by mass, and still more preferably 500 to 2,000 parts by mass with respect to 100 parts by mass of activated carbon. parts, more preferably 500 to 1,500 parts by mass, more preferably 550 to 1,050 parts by mass, and particularly preferably 600 to 1,000 parts by mass. When the content is 10 parts by mass or more, smudges caused by application can be further suppressed, and the effect of suppressing body odor is more excellent. When the content is 10,000 parts by mass or less, the adsorption capacity of the component (A) is more excellent, and the body odor suppressing effect of the body odor suppressant is more excellent.

The total content of activated carbon and titanium oxide in component (A) is not particularly limited, but is 50.0% by mass or more (50.0 to 100% by mass) relative to 100% by mass of component (A). ), more preferably 70.0% by mass or more, and still more preferably 80.0% by mass or more. In addition, the total of the content ratios is 100% by mass or less, and may be 99.95% by mass or less, 90.0% by mass or less, or 85.0% by mass or less.

The content of the resin in component (A) is not particularly limited, but from the viewpoint of improving the adhesion of titanium oxide to activated carbon, it is 0.005 to 10.0% by mass with respect to 100% by mass of component (A). is preferred, and more preferably 0.05 to 1.0% by mass.

Component (A) is formed by depositing titanium oxide on the surface of activated carbon. Preferably, it is formed by depositing titanium oxide on the surface of activated carbon through the resin. The method for producing component (A) is not particularly limited, and known methods can be used. A method for producing titanium oxide-coated activated carbon described in the publication can be used. A specific method for producing the titanium oxide-coated activated carbon is, for example, as follows. Activated carbon, titanium oxide, and an emulsion of the above resin are mixed, and the surface of the activated carbon is coated with titanium oxide. Next, the obtained activated carbon coated with titanium oxide is dried and, if necessary, pulverized into granules to obtain component (A).

The content of component (A) in the body odor depressant of the present invention is 0.05 to 5.0% by mass, preferably 0.1 to 3.0% by mass, based on 100% by mass of the body odor depressant of the present invention. 0 mass %, more preferably 0.1 to 1.5 mass %. When the content is 0.05% by mass or more, the effect of suppressing body odor is excellent. Also, when the amount of component (A) is small, the problem of whitening is less likely to occur. When the content ratio is 5.0% by mass or less, the absence of whitening is excellent. The content of component (A) is the total content of all components (A) in the body odor depressant of the present invention.

[Component (B)]
Component (B) is ethanol. By using the component (B), the body odor depressant of the present invention can be imparted with quick-drying properties and a refreshing feel. In addition, after the body odor suppressant of the present invention is applied to the skin, it has stickiness suppressing action and bactericidal action. Ethanol also has the effect of improving the solubility of other components.

The content of component (B) in the body odor depressant of the present invention is 40.0 to 90.0% by mass, preferably 50.0 to 85.0% by mass, based on 100% by mass of the body odor depressant of the present invention. It is 0% by mass. When the content is 40.0% by mass or more, the quick-drying property after application to the skin is excellent. In addition, it can impart a refreshing feel to the skin, and is excellent in stickiness-suppressing action and bactericidal action. When the content is 90.0% by mass or less, it is excellent in preventing whitening.

[Component (C)]
Component (C) is a tetraester of a fatty acid having 8 to 22 carbon atoms and pentaerythritol. By blending the component (C), whitening of the component (A) is less likely to occur after application to the skin, precipitation of the component (A) is suppressed, and the stability of the composition is excellent. In addition, when the component (B) is blended at a high concentration, whitening is particularly likely to occur, but the whitening can be prevented by blending the component (C). Only one kind of component (C) may be used, or two or more kinds thereof may be used.

Examples of component (C) include pentaerythrityl tetraethylhexanoate, pentaerythrityl tetraisostearate, pentaerythrityl tetramyristate, pentaerythrityl tetrastearate, and pentaerythrityl tetrabehenate. Among them, pentaerythrityl tetraethylhexanoate is preferred.

The content of component (C) in the body odor depressant of the present invention is 0.05 to 10.0% by mass, preferably 0.1 to 8.0% by mass, based on 100% by mass of the body odor depressant of the present invention. 0% by mass, more preferably 0.2 to 6.0% by mass. When the content is 0.05% by mass or more, whitening of component (A) can be suppressed after application to the skin. When the content is 10.0% by mass or less, the sliminess caused by the component (C) can be suppressed. The content of component (C) is the total content of all components (C) in the body odor depressant of the present invention.

[water]
The body odor depressant of the present invention preferably contains water. Water is not particularly limited, but purified water is preferred. From the viewpoint of quick drying, the content of water in the body odor depressant of the present invention is preferably more than 0% by mass and 50.0% by mass or less with respect to 100% by mass of the body odor depressant of the present invention. It is preferably 5.0 to 45.0% by mass. It does not have to contain water.

The body odor suppressant of the present invention may contain a thickener. Examples of the thickening agent include water-soluble polymers. Specific examples of the thickener include cellulose thickeners such as hydroxyalkyl cellulose; acrylic thickeners such as carboxyvinyl polymer and alkyl-modified carboxyvinyl polymer; gum thickeners such as xanthan gum and guar gum. mentioned. Examples of the hydroxyalkyl cellulose include hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxypropylmethyl cellulose. Only one type of the thickening agent may be used, or two or more types may be used.

When the body odor depressant of the present invention contains a thickener, the content ratio of the thickener in the body odor depressant of the present invention is 0.05 to 3.0 with respect to 100% by mass of the body odor depressant of the present invention. % by mass, more preferably 0.1 to 2.0% by mass. The content ratio of the thickener is the total content ratio of all the thickeners in the body odor deterrent of the present invention.

[Other ingredients]
The body odor depressant of the present invention may contain components (other components) other than the above components such as components (A) to (C). The other ingredients are not particularly limited, and include, for example, ingredients commonly used in cosmetics and quasi-drugs. Specifically, for example, lower alcohols other than component (B); oily components other than component (C); polyhydric alcohols; anti-inflammatory agents such as glycyrrhizic acid and salts thereof; cooling agents such as menthol; Salts, citric acid and its salts, lactic acid and its salts, sodium hydroxide, pH adjusters such as triethanolamine; fragrances; UV absorbers; antioxidants; preservatives; Amino acids; Astringents; Whitening agents; Animal and plant extracts; Neutralizing agents; Only one kind of each of the other components may be used, or two or more kinds thereof may be used.

The antiperspirant component is, for example, a drug that suppresses the generation of perspiration by astringent the skin. When the body odor suppressant of the present invention contains the above antiperspirant component together with the component (A), the body odor suppressing effect is even more excellent. Examples of the antiperspirant component include chloroaluminum chloride, aluminum potassium sulfate, aluminum sulfate, aluminum acetate, allantoin chlorohydroxyaluminum, and zinc paraphenolsulfonate.

The antiperspirant component (particularly chlorohydroxyaluminum) tends to cause whitening in the presence of component (B), especially when the component (B) is contained at a high concentration. However, even when the antiperspirant agent of the present invention contains the above antiperspirant component together with the component (A), the antiperspirant agent of the present invention is excellent in suppressing the whitening, and is further superior in the effect of suppressing the body odor.

When the body odor depressant of the present invention contains an antiperspirant component, the content of the antiperspirant component in the body odor depressant of the present invention is 5.0 to 20.0 with respect to 100% by mass of the body odor depressant of the present invention. % by mass, more preferably 8.0 to 15.0% by mass. The content of the antiperspirant component is the total content of all the antiperspirant components in the body odor suppressant of the present invention.

The above-mentioned deodorizing component is a chemical agent that has the effect of eliminating odors by reacting with odor-emitting substances, adsorbing odor-emitting substances, or masking odors. The deodorizing component other than the above component (A) is not particularly limited, but examples thereof include metal oxides such as zinc oxide, silica, alkyldiethanolamide, hydroxyapatite, tea extracts, fragrances, antioxidants, and the like. .

The disinfectant is, for example, a drug that suppresses the growth of skin-indigenous bacteria that produce substances that cause body odor. Examples of the fungicide include isopropylmethylphenol, benzalkonium chloride, benzethonium chloride, chlorhexidine hydrochloride, phenol, trichlorocarbanilide, chlorhexidine gluconate, triclosan, triclocarban, piroctone olamine, zinc pyrithione, salicylic acid, sorbic acid. , and lysozyme chloride.

Examples of the cooling agent include menthol, menthyl glyceryl ether, menthyl lactate, camphor, eucalyptol, and icilin.

The body odor control agent of the present invention preferably contains little or substantially no surfactant. That is, the body odor depressant of the present invention does not contain a surfactant, or the content of the surfactant in the body odor depressant of the present invention is 1 mass with respect to 100 mass% of the body odor depressant of the present invention. % or less (preferably 0.5 mass % or less, more preferably 0.3 mass % or less). When the content of the surfactant is 1% by mass or less, the stability of the composition is excellent, and stickiness, sliminess, and irritation to the skin can be suppressed during application.

Examples of the surfactant include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants.

The body odor deterrent of the present invention preferably contains only a small amount or substantially no oily components other than component (C) from the viewpoints of further suppressing stickiness and improving stability. That is, the body odor depressant of the present invention does not contain oily components other than component (C), or the content of oily components other than component (C) in the body odor depressant of the present invention is equal to the body odor depressant of the present invention. It is preferably 2.0% by mass or less (preferably 1.5% by mass or less, more preferably 1.0% by mass or less) with respect to 100% by mass of the agent.

The body odor deterrent of the present invention is preferably a non-emulsifying composition (non-emulsifying composition). A non-emulsifying composition further improves quick-drying properties and a refreshing feeling in use. In addition, the stickiness of the skin after application is less likely to occur, and the stability is also excellent.

The dosage form of the body odor suppressant of the present invention is not particularly limited, but includes lotions, mists, sprays (aerosol type and non-aerosol type), tubes, sheets, roll-ons and the like. The body odor depressant of the present invention is preferably used as a roll-on dosage form. When it is a roll-on formulation, the composition can be directly and uniformly applied to the application target without applying the composition to the application target by putting the composition on the hands, and the application properties are excellent. For example, it is easy to apply the body odor control agent in the roll-on container directly to the skin such as armpits. When the body odor depressant of the present invention is in the form of a roll-on formulation, it is packed in a roll-on container and used as a roll-on product. The roll-on product comprises a container capable of discharging contents, and the body odor suppressant of the present invention filled in the container. The container has a roll in the application section. The roll may be a cylindrical member or a spherical member.

The body odor suppressant of the present invention is preferably used by being applied to the skin. Examples of application sites for application to the skin include armpits, arms, feet, soles, neck, chest, trunk, buttocks, face, and hair.

The body odor suppressant of the present invention is not particularly limited, and can be produced by a known or commonly used method. For example, each component may be homogenized by mixing the above components and stirring using a known stirring device such as a disper mixer or a paddle mixer.

The body odor suppressant of the present invention is a system containing ethanol [component (B)] and titanium oxide-coated activated carbon [component (A)], which is a deodorizing component, in which a fatty acid having 8 to 22 carbon atoms and pentaerythritol are combined. By containing a tetraester [component (C)] and setting each of the components (A) to (C) in a specific content ratio, whitening of the component (A) on the skin after application can be suppressed. In addition, the quick-drying property exhibited by the inclusion of the component (B) is not inhibited. In addition, since it is not necessary to blend a large amount of oil, it is possible to prevent stickiness on the skin after application.

EXAMPLES The present invention will be described in more detail below based on examples, but the present invention is not limited only to these examples. The compounding amounts shown in the table are the compounding amounts of each component (that is, the compounding amount of the active ingredient in each raw material; so-called pure content), and are expressed in "% by mass" unless otherwise specified. Also, "-" in the table indicates that it was not blended.

Examples 1-6, Comparative Examples 1-17
Using each component (components (A) to (C)) shown in the table and other components, each body odor suppressant of Examples and Comparative Examples was prepared by a conventional method.

(evaluation)
Each agent obtained in Examples and Comparative Examples was evaluated as follows. The evaluation results are shown in the table.

(1) Absence of whitening (relative evaluation)
About 0.15 g of each agent obtained in Examples 1 to 6 and Comparative Examples 1 to 16 was dropped on the inside of the forearm and dried with a drier. The dripped portion after drying was visually observed, and the absence of whitening was observed. Then, in each example and comparative example, the absence of whitening was compared between agents containing the same component (A), component (B), and water content, and component (C) and its alternative component Based on the absence of whitening in a comparative example containing no ester oil, the absence of whitening was determined according to the following criteria. Specifically, Example 1 is Comparative Example 1, Example 2 is Comparative Example 2, Example 3 and Comparative Examples 4 to 8 are Comparative Example 3, Example 4 and Comparative Examples 10 to 14 are Comparative Examples. 9, Comparative Example 15 for Example 5, and Comparative Example 16 for Example 6, and the absence of whitening was determined. Results are shown in Tables 1 and 2.
[criterion]
◯ (good): superior to the reference in the absence of whitening.
x (defective): The absence of whitening was equal to or lower than the standard.

(2) Absence of whitening (absolute evaluation)
About 0.15 g of each agent obtained in Examples 1, 2, 3, 5, 6 and Comparative Example 17 was dropped on the inside of the forearm and dried with a dryer. The dripped portion after drying was visually observed, and the absence of whitening was judged according to the following criteria. Table 3 shows the results.
[criterion]
⊚ (excellent): no white residue is observed at the dripped portion.
◯ (Good): Almost no white residue was observed on the dripped portion, and by rubbing the dripped portion by hand, the residue blended into the skin and the whiteness disappeared.
Δ (can be used): A small amount of white residue is observed in the dripped portion, and even if the dripped portion is rubbed with a hand, whitening remains, but it is very mild.
x (defective): A white residue is clearly observed at the dripped portion, and even if the dripped portion is rubbed with a hand, a strong white residue remains.

As shown in the table, the body odor suppressant of the present invention (Example) suppresses whitening compared to the case where the component (C) is not included or the other ester oil is not included instead of the component (C). It was evaluated as being Further, when the content of component (A) was high (Comparative Example 18), whitening occurred even when component (C) was blended.

Furthermore, formulation examples of the body odor suppressant of the present invention are shown below.
(Prescription example 1 deodorant water)
Isopropylmethylphenol 0.2% by mass
Zinc sulfocarbate 1.0% by mass
Ethanol 50.0% by mass
Menthol 0.1% by mass
Titanium oxide coated activated carbon 0.5% by mass
Pentaerythrityl tetraethylhexanoate 1.0% by mass
Water balance total 100.0% by mass

(Prescription example 2 Deodorant roll-on)
Isopropylmethylphenol 0.2% by mass
Aluminum chlorohydroxyl 15.0% by mass
Ethanol 60.0% by mass
Menthol 0.1% by mass
Titanium oxide coated activated carbon 0.5% by mass
Pentaerythrityl tetraethylhexanoate 1.0% by mass
Hydroxypropyl cellulose 0.3% by mass
Water balance total 100.0% by mass

Claims (4)

Containing the following component (A), the following component (B), and the following component (C),
The content of component (A) is 0.05 to 5.0% by mass,
The content of component (B) is 40.0 to 90.0% by mass,
A body odor suppressant containing component (C) in an amount of 0.05 to 10.0% by mass.
Component (A): Titanium oxide-coated activated carbon Component (B): Ethanol Component (C): Tetraester of fatty acid having 8 to 22 carbon atoms and pentaerythritol 2. The body odor deterrent according to claim 1, wherein component (C) is pentaerythrityl tetraethylhexanoate. The body odor suppressant according to claim 1 or 2, which is a non-emulsifying composition. The body odor suppressant according to any one of claims 1 to 3, which does not contain a surfactant or has a surfactant content of 1.0% by mass or less.