Liquid antiperspirant composition

Abstract

To provide a liquid antiperspirant composition that excels in terms of antiperspirant effect and its durability, no skin tightness after application, no skin irritation, and formulation appearance.SOLUTION: A liquid antiperspirant composition contains (A) at least one selected from aluminum halide hydrates or complexes thereof, and aluminum halides, (B) at least one selected from α-hydroxy acids, alkali metal salts of α-hydroxy acids, alkaline earth metal salts of α-hydroxy acids, amine salts of α-hydroxy acids, and ammonium salts of α-hydroxy acids, and (C) a water-soluble inorganic salt excluding aluminum salts.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to liquid antiperspirant compositions. [Background technology]

[0002] Conventionally, antiperspirant compositions containing antiperspirant components having antiperspirant effects, such as aluminum chlorohydrate, have been widely used. Aluminum chlorohydrate exerts its antiperspirant effect by plugging sweat glands. In recent years, antiperspirant compositions that use sulfate ions in combination have been proposed for the purpose of improving the decrease in antiperspirant effect caused by the elution of aluminum chlorohydrate from sweat glands accompanying an increase in the amount of sweating (see, for example, Patent Document 1).

[0003] However, in conventional antiperspirant compositions including that described in Patent Document 1, there is a concern that plugs derived from aluminum chlorohydroxyl may be insufficiently formed due to keratin that is easily peeled off during shaving and keratin plugs formed by the combination of sweat and sebum secreted from sweat glands, resulting in a decrease in the antiperspirant effect and its durability. Therefore, a satisfactory liquid antiperspirant composition having excellent antiperspirant effect and long-lasting effect has not yet been provided, and there is currently a strong demand for such a composition to be provided promptly. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2021 / 085059 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a liquid antiperspirant composition which has an antiperspirant effect and its duration, does not cause a feeling of tightness on the skin after application, is free of skin irritation, and has an excellent appearance as a preparation. [Means for solving the problem]

[0006] The liquid antiperspirant composition of the present invention contains (A) at least one selected from an aluminum halide hydrate or a complex thereof, and an aluminum halide, (B) at least one selected from an α-hydroxy acid, an alkali metal salt of an α-hydroxy acid, an alkaline earth metal salt of an α-hydroxy acid, an amine salt of an α-hydroxy acid, and an ammonium salt of an α-hydroxy acid, and (C) a water-soluble inorganic salt other than an aluminum salt.

[0007] The present invention is based on the above findings by the present inventors, and the means for solving the above problems are as follows. <1> (A) at least one selected from an aluminum halide hydrate or a complex thereof, and an aluminum halide; (B) at least one selected from an α-hydroxy acid, an alkali metal salt of an α-hydroxy acid, an alkaline earth metal salt of an α-hydroxy acid, an amine salt of an α-hydroxy acid, and an ammonium salt of an α-hydroxy acid; (C) a water-soluble inorganic salt other than an aluminum salt; A liquid antiperspirant composition comprising: <2> a mass ratio of the content of (B) to the content of (C) [(B) / (C)] is 0.9 or more and 50 or less; <1> The liquid antiperspirant composition according to claim 1, <3> the content of (A) is 10% by mass or more and 15% by mass or less based on the total amount of the liquid antiperspirant composition, the content of (B) is 0.45% by mass or more and 3% by mass or less based on the total amount of the liquid antiperspirant composition, The content of the (C) is 0.1% by mass or more and 0.7% by mass or less based on the total amount of the liquid antiperspirant composition. <1> or the above <2> The liquid antiperspirant composition according to claim 1, <4> The cosmetic composition is any one selected from a roll-on type, a lotion type, and a mist type. <1> From the above <3> The liquid antiperspirant composition according to any one of claims 1 to 5, Effect of the Invention

[0008] According to the present invention, it is possible to provide a liquid antiperspirant composition which has an excellent antiperspirant effect and its duration, does not cause a tight feeling on the skin after application, is free of skin irritation, and has an excellent appearance as a preparation. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (Liquid antiperspirant composition) The liquid antiperspirant composition of the present invention contains (A) at least one selected from an aluminum halide hydrate or a complex thereof, and an aluminum halide, (B) at least one selected from an α-hydroxy acid, an alkali metal salt of an α-hydroxy acid, an alkaline earth metal salt of an α-hydroxy acid, an amine salt of an α-hydroxy acid, and an ammonium salt of an α-hydroxy acid, and (C) a water-soluble inorganic salt other than an aluminum salt, and may contain other components as necessary. In this specification, the "(A) at least one selected from aluminum halide hydrates or complexes thereof, and aluminum halides" may be referred to as "(A)" or "component (A)", the "(B) at least one selected from α-hydroxy acids, alkali metal salts of α-hydroxy acids, alkaline earth metal salts of α-hydroxy acids, amine salts of α-hydroxy acids, and ammonium salts of α-hydroxy acids" may be referred to as "(B)" or "component (B)", and the "(C) water-soluble inorganic salt other than aluminum salts" may be referred to as "(C)" or "component (C)".

[0010] <(A) At least one selected from aluminum halide hydrate or a complex thereof, and aluminum halide> The component (A) is contained mainly to impart an antiperspirant effect.

[0011] The component (A) is not particularly limited, so long as it is at least one selected from aluminum halide, aluminum halide hydrate, and aluminum halide hydrate complex, and can be appropriately selected depending on the purpose. The aluminum halide may, for example, be aluminum chloride. Examples of the aluminum halide hydrate include aluminum chlorohydrate, aluminum bromohydrate, and aluminum chlorohydrate / zirconium. Examples of the aluminum halide hydrate complex include aluminum chlorohydrate / propylene glycol complex, aluminum chlorohydrate / zirconium glycine complex, and the like. Among these, aluminum chlorohydrate, aluminum chlorohydrate / propylene glycol complex, and aluminum chlorohydrate / zirconium glycine complex are preferred because of their excellent antiperspirant effect. These may be used alone or in combination of two or more.

[0012] The component (A) may be an appropriately synthesized product or a commercially available product. Examples of commercially available products of the component (A) include, by trade name, Aluminum (III) Chloride (manufactured by Tokyo Chemical Industry Co., Ltd., aluminum chloride), 50% aqueous solution of aluminum chlorohydrate (manufactured by Taki Chemical Industry Co., Ltd., aluminum chlorohydrate), REHYDROL II (manufactured by ELEMENTIS, aluminum chlorohydrate / propylene glycol complex), and Reach AZO-956G (manufactured by ELEMENTIS, aluminum chlorohydrate / zirconium glycine complex).

[0013] The content of the component (A) is not particularly limited and can be appropriately selected depending on the purpose. From the viewpoints of antiperspirant effect and lack of tightness on the skin, the content is preferably from 6 to 15% by mass, and more preferably from 10 to 15% by mass, based on the total amount of the liquid antiperspirant composition. It is preferable that the content of the component (A) is 6% by mass or more based on the total amount of the liquid antiperspirant composition, since this provides a good antiperspirant effect. It is preferable that the content of the component (A) is 15% by mass or less based on the total amount of the liquid antiperspirant composition, since this prevents the skin from feeling tight.

[0014] <(B) At least one selected from α-hydroxy acids, alkali metal salts of α-hydroxy acids, alkaline earth metal salts of α-hydroxy acids, amine salts of α-hydroxy acids, and ammonium salts of α-hydroxy acids> The component (B) is contained mainly to impart an antiperspirant effect. In this specification, "alkali metal salts, alkaline earth metal salts, amine salts, and ammonium salts" may be simply referred to as "salts".

[0015] The α-hydroxy acid is not particularly limited and can be appropriately selected depending on the purpose. Examples of the α-hydroxy acid include glycolic acid, lactic acid, malic acid, tartaric acid, and citric acid.

[0016] Examples of the salt of glycolic acid include sodium glycolate, potassium glycolate, ammonium glycolate, calcium glycolate, magnesium glycolate, and 2-amino-2-methyl-1-propanol salt of glycolic acid. Examples of the salt of lactic acid include sodium lactate, potassium lactate, ammonium lactate, calcium lactate, magnesium lactate, and 2-amino-2-methyl-1-propanol lactic acid. Examples of the salt of malic acid include sodium malate, potassium malate, ammonium malate, calcium malate, magnesium malate, and 2-amino-2-methyl-1-propanol salt of malic acid. Examples of the salt of tartaric acid include sodium tartrate, potassium tartrate, ammonium tartrate, AMP tartrate, calcium tartrate, magnesium tartrate, and 2-amino-2-methyl-1-propanol salt of tartaric acid. Examples of the salt of citric acid include sodium citrate, potassium citrate, ammonium citrate, calcium citrate, magnesium citrate, and 2-amino-2-methyl-1-propanol citric acid salt.

[0017] Among these, from the viewpoint of excellent antiperspirant effect and its durability, glycolic acid, lactic acid, sodium glycolate, potassium glycolate, ammonium glycolate, 2-amino-2-methyl-1-propanol salt of glycolic acid, sodium lactate, potassium lactate, ammonium lactate, and 2-amino-2-methyl-1-propanol salt of lactic acid are preferred.

[0018] The component (B) may be an appropriately synthesized product or a commercially available product. Examples of commercially available products of component (B) include, by trade name, Glypure 70 (manufactured by DuPont, glycolic acid), GLYCOS™ Clear 70 (manufactured by Azelis Japan Co., Ltd., glycolic acid), quasi-drug raw material standard lactic acid (manufactured by Komatsuya Co., Ltd., lactic acid), Japanese Pharmacopoeia 90% lactic acid (manufactured by Showa Kako Co., Ltd., lactic acid), DL-malic acid (manufactured by Showa Kako Co., Ltd., malic acid), tartaric acid (manufactured by Showa Kako Co., Ltd., tartaric acid), quasi-drug raw material standard citric acid (manufactured by Komatsuya Co., Ltd., citric acid), and citric acid (manufactured by Showa Kako Co., Ltd., citric acid).

[0019] The content of the component (B) is not particularly limited and can be appropriately selected depending on the purpose. From the viewpoints of excellent antiperspirant effect and its durability, as well as excellent lack of skin irritation, the content is preferably from 0.25% by mass to 5.00% by mass, and more preferably from 0.45% by mass to 3.0% by mass, relative to the total amount of the liquid antiperspirant composition. It is preferable that the content of the component (B) is 0.25% by mass or more based on the total amount of the liquid antiperspirant composition, since this provides good antiperspirant effect and its durability. It is preferable that the content of the component (B) is 5.00% by mass or less based on the total amount of the liquid antiperspirant composition, since this results in a satisfactory lack of skin irritation.

[0020] <(C) Water-soluble inorganic salts other than aluminum salts> The component (C) is contained mainly to impart an antiperspirant effect.

[0021] The component (C) is not particularly limited and may be appropriately selected depending on the purpose, so long as it is a water-soluble inorganic salt other than an aluminum salt. Examples of the salt include sulfates, carbonates, bicarbonates, and hydrochlorides. Among these, sulfates are preferred because of their excellent antiperspirant effect and durability.

[0022] The counter ion in the water-soluble inorganic salt is not particularly limited and can be appropriately selected depending on the purpose. Examples of the counter ion include an alkali metal ion (sodium ion, potassium ion), a barium ion, and a magnesium ion. Among these, sodium ions, potassium ions, and magnesium ions are preferred as counter ions in the water-soluble inorganic salts.

[0023] Specific examples of the sulfate include sodium sulfate, potassium sulfate, magnesium sulfate, and barium sulfate. Specific examples of the carbonate include sodium carbonate, potassium carbonate, magnesium carbonate, and barium carbonate. Specific examples of the bicarbonate include sodium bicarbonate and potassium bicarbonate. Specific examples of the hydrochloride include sodium chloride, potassium chloride, magnesium chloride, and barium chloride. Among these, sodium sulfate, potassium sulfate, magnesium sulfate, and barium sulfate are preferred because they can quickly form a strong plug that is not easily dissolved by sweat, even when the amount of sweat increases due to long-term sweating, and therefore improve the antiperspirant effect and its durability. These may be used alone or in combination of two or more.

[0024] The component (C) may be an appropriately synthesized product or a commercially available product. Examples of commercially available products of the component (C) include, by trade name, neutral anhydrous Glauber's salt (manufactured by Nippon Chemical Industry Co., Ltd., anhydrous sodium sulfate), anhydrous sodium sulfate (Tomita Pharmaceutical Co., Ltd.), magnesium sulfate (anhydrous) (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.), sodium carbonate (manufactured by Takasugi Pharmaceutical Co., Ltd.), and sodium chloride (manufactured by Junsei Chemical Co., Ltd.).

[0025] The content of the component (C) is not particularly limited and can be appropriately selected depending on the purpose. From the viewpoints of excellent antiperspirant effect and its durability, as well as excellent appearance of the preparation, the content is preferably from 0.01% by mass to 1.0% by mass, and more preferably from 0.1% by mass to 0.7% by mass, relative to the total amount of the liquid antiperspirant composition. It is preferable that the content of the component (C) is 0.01% by mass or more based on the total amount of the liquid antiperspirant composition, since this leads to good antiperspirant effect and its durability. It is preferable that the content of the component (C) is 1.0% by mass or less based on the total amount of the liquid antiperspirant composition, since this leads to a good appearance of the preparation.

[0026] <Mass ratio [(B) / (C)]> In this specification, the mass ratio [(B) / (C)] of the content of the component (B) to the content of the component (C) is sometimes referred to as the "mass ratio [(B) / (C)]". The mass ratio [(B) / (C)] is not particularly limited and can be appropriately set depending on the purpose. From the viewpoints of the durability of the antiperspirant effect and the appearance of the preparation, however, it is preferably 0.9 or more and 50 or less, and more preferably 1 or more and 5 or less. It is preferable for the mass ratio [(B) / (C)] to be 0.9 or more and 50 or less since this results in a good appearance of the preparation.

[0027] <Other ingredients> The liquid antiperspirant composition may contain other ingredients in addition to the components (A) to (C) as long as the ingredients do not impair the effects of the present invention. The other components are not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include bactericidal components, deodorant components, liquid oils, solid oils, polyhydric alcohols, surfactants, chelating agents, antioxidants, pH adjusters other than the component (C), plant extracts, refreshing agents, colorants, fragrances, viscosity adjusters, water or solvents, etc. These may be used alone or in combination of two or more.

[0028] The antiseptic component is contained mainly to impart a deodorant effect and antiseptic properties. The bactericidal component is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include isopropylmethylphenol, triclosan, salicylic acid, phenoxyethanol, benzalkonium chloride, cetylpyridinium chloride, etc. Among these, isopropylmethylphenol and benzalkonium chloride are preferred. These may be used alone or in combination of two or more.

[0029] The content of the bactericidal component is not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired; however, it is preferably from 0.001% by mass to 5.0% by mass, and more preferably from 0.01% by mass to 3.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0030] The deodorizing component is contained mainly to impart a deodorant effect. The deodorizing component is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include zinc oxide, dry distillation extract of green tea, alum, cyclodextrin, etc. Among these, zinc oxide is preferred. These may be used alone or in combination of two or more.

[0031] The content of the deodorant component is not particularly limited and can be appropriately selected depending on the purpose as long as it does not impair the effects of the present invention, but is preferably from 0.01% by mass to 5.0% by mass, and more preferably from 0.1% by mass to 3.0% by mass, based on the total amount of the liquid antiperspirant composition.

[0032] The liquid oil is contained mainly as a base and for imparting a feeling of smoothness and moisture to the skin. The liquid oil is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include ester oil, ether oil, silicone oil, mineral oil, vegetable oil, etc. Among these, ester oil, ether oil, and silicone oil are preferred. These may be used alone or in combination of two or more.

[0033] The content of the liquid oil is not particularly limited and can be appropriately selected depending on the purpose as long as it does not impair the effects of the present invention, but is preferably from 0.1% by mass to 10.0% by mass, and more preferably from 0.5% by mass to 3.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0034] The solid oil is contained mainly as a base and to impart a feel (moist feeling). The solid oil is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include candelilla wax, carnauba wax, beeswax, paraffin, microcrystalline wax, polyethylene wax, castor oil, etc. Among these, castor oil and paraffin are preferred. These may be used alone or in combination of two or more.

[0035] The content of the solid oil is not particularly limited and can be appropriately selected depending on the purpose as long as it does not impair the effects of the present invention, but is preferably from 0.1% by mass to 10.0% by mass, and more preferably from 0.5% by mass to 3.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0036] The polyhydric alcohol is contained mainly to impart a feeling of smoothness and moisture to the skin. The polyhydric alcohol is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin, ethylene glycol, sorbitol, polyethylene glycol, etc. Among these, glycerin and polyethylene glycol are preferred. These may be used alone or in combination of two or more.

[0037] The content of the polyhydric alcohol is not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired; however, the content is preferably from 0.01% by mass to 5.0% by mass, and more preferably from 0.1% by mass to 3.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0038] The surfactant is contained mainly for the purposes of solubilizing poorly soluble components and improving stability. The surfactant is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include anionic surfactants, nonionic surfactants, cationic surfactants, etc. Among these, nonionic surfactants are preferred. These may be used alone or in combination of two or more.

[0039] The content of the surfactant is not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired; however, the content is preferably from 0.01% by mass to 5.0% by mass, and more preferably from 0.1% by mass to 3.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0040] The chelating agent is contained mainly to prevent coloration and improve stability. The chelating agent is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include ethylenediamine, ethylenediaminetetraacetic acid, phenanthroline, bipyridine, crown ether, etc. Among these, ethylenediaminetetraacetic acid is preferable. These may be used alone or in combination of two or more.

[0041] The content of the chelating agent is not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired. The content of the chelating agent is preferably from 0.01% by mass to 3.0% by mass, and more preferably from 0.05% by mass to 2.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0042] The antioxidant is included primarily to improve stability. The antioxidant is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include ascorbic acid, tocopherol, dibutylhydroxytoluene, etc. Among these, dibutylhydroxytoluene is preferred. These may be used alone or in combination of two or more.

[0043] The content of the antioxidant is not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired; however, the content is preferably from 0.01% by mass to 3.0% by mass, and more preferably from 0.05% by mass to 2.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0044] The pH adjuster is included primarily to improve stability. The pH adjuster is not particularly limited and can be appropriately selected depending on the purpose. Examples of the pH adjuster include sodium hydroxide and potassium hydroxide. These may be used alone or in combination of two or more.

[0045] The content of the pH adjuster is not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired; however, the content is preferably from 0.01% by mass to 5.0% by mass, and more preferably from 0.1% by mass to 3.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0046] The plant extract is contained mainly to impart a deodorant effect and a moisturizing effect, and to improve the feeling of use and stability. The plant extract is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include rosemary extract, eucalyptus extract, sophora flavescens extract, mulberry extract, hypericum extract, apricot kernel extract, saxifrage extract, coix seed extract, persimmon tannin extract, peppermint oil, peppermint oil, etc. Among these, rosemary extract and eucalyptus extract are preferred. These may be used alone or in combination of two or more.

[0047] The content of the plant extract is not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired. However, the content is preferably from 0.001% by mass to 5.0% by mass, and more preferably from 0.01% by mass to 3.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0048] The cooling agent is contained mainly to improve the feeling of use. The cooling agent is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include menthol, menthyl lactate, methyl salicylate, camphor, thymol, etc. Among these, menthol and menthyl lactate are preferred. These may be used alone or in combination of two or more.

[0049] The content of the cooling agent is not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired. The content is preferably from 0.01% by mass to 3.0% by mass, and more preferably from 0.05% by mass to 2.0% by mass, relative to the total amount of the liquid antiperspirant composition.

[0050] The coloring matter and the flavoring matter are not particularly limited, and can be appropriately selected from known coloring matters and flavoring matters according to the purpose. The fragrance may be appropriately selected from, for example, fragrances A to D described in paragraphs

[0065] to

[0071] of JP 2002-128658 A, fragrances A to E described in paragraphs

[0076] to

[0088] of JP 2003-73249 A, and fragrances 1 to 4 described in paragraphs

[0016] to

[0023] of Japanese Patent Application No. 2019-023940 A.

[0051] The contents of the colorant and the fragrance are not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired. The contents of the colorant and the fragrance are preferably from 0.001% by mass to 1.0% by mass, and more preferably from 0.005% by mass to 0.5% by mass, relative to the total amount of the liquid antiperspirant composition.

[0052] The viscosity adjusting agent is contained mainly to adjust the viscosity of the liquid antiperspirant composition. The viscosity modifier is not particularly limited and can be appropriately selected depending on the purpose. Examples of the viscosity modifier include hydroxypropyl cellulose.

[0053] The content of the viscosity modifier is not particularly limited and can be appropriately selected depending on the purpose as long as the effects of the present invention are not impaired. The content is preferably from 0.05% by mass to 2.0% by mass, and more preferably from 0.2% by mass to 0.7% by mass, relative to the total amount of the liquid antiperspirant composition.

[0054] The water or solvent is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include purified water, ion-exchanged water, pure water, etc. These may be used alone or in combination of two or more kinds. The content of the water or solvent is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected depending on the purpose.

[0055] -pH- The pH of the liquid antiperspirant composition at 25° C. is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 3.5 to 6.0 from the standpoint of antiperspirant effect and appearance of the agent.

[0056] -viscosity- The viscosity of the liquid antiperspirant composition is not particularly limited and may be appropriately selected depending on the purpose, but from the standpoint of antiperspirant effect, it is preferably 1.0 mPa·s to 2,000 mPa·s at 25°C. The viscosity can be measured by adjusting the temperature of the liquid antiperspirant composition to 25° C., setting it in, for example, a BM type viscometer (using a No. 1 rotor or a No. 2 rotor), rotating the rotor at a rotation speed of 60 rpm, and waiting 1 minute after the rotor starts to rotate.

[0057] -Dosage form- The liquid antiperspirant composition is preferably in a liquid form, since application to the skin in a dissolved state in water is effective for achieving the desired effect, and the composition can be applied with high adhesion and provide a high level of effectiveness.

[0058] Examples of the liquid type include roll-on type, mist type, and lotion type. Among these, the roll-on type is preferred from the viewpoint of antiperspirant effect.

[0059] When the liquid antiperspirant composition is of a roll-on type, it is preferable that the liquid antiperspirant composition is an antiperspirant product comprising the liquid antiperspirant composition and a roll-on container having an application ball filled with the liquid antiperspirant composition. The roll-on type preparation is such that the liquid antiperspirant composition is contained in a known roll-on container, the liquid antiperspirant composition is attached to a ball in a state where a part of the ball is exposed to the roll-on container and is rotatably held by a holder, and the ball is attached to the skin when in use, thereby allowing the liquid antiperspirant composition to be applied to the skin. The liquid antiperspirant composition can also be suitably used in lotion preparations by filling the liquid antiperspirant composition into a bottle container.

[0060] -container- Examples of containers that can be used for the liquid type include roll-on containers, bottle containers for lotions, and trigger-type spray containers for mist. Among these, roll-on containers are preferred from the viewpoint of ease of application to the skin. The roll-on containers can be suitably used in that the liquid antiperspirant composition can be applied closely to the skin and can exert an antiperspirant effect.

[0061] The roll-on container is not particularly limited as long as it can be filled with the liquid antiperspirant composition and can be appropriately selected depending on the purpose. Examples of the container include the container described in JP 2005-186997 A; a container made of a bottle (material: HDPE natural, full capacity: about 56 mL, body diameter: diameter about 33 mm, height: about 87 mm, manufactured by Yoshino Kogyosho Co., Ltd.), a ring (material: LLDPE natural, outer diameter: about 26 mm, height: about 18 mm, manufactured by Yoshino Kogyosho Co., Ltd.), and a bowl (material: PP white, diameter: about 20 mm, manufactured by Yoshino Kogyosho Co., Ltd.).

[0062] The lotion bottle container is not particularly limited as long as it can be filled with the liquid antiperspirant composition and can be appropriately selected depending on the purpose. Examples of the lotion bottle container include containers consisting of a bottle (trade name: TOMIII-50, material: HDPE natural, full capacity: about 34 mL, body diameter: diameter about 42 mm × 29 mm (oval), height: about 88 mm, manufactured by Takemoto Container Co., Ltd.), an inner stopper (trade name: Nozzle A for TO Cap, material: PE natural, outer diameter: about 12 mm, height: about 13 mm, manufactured by Takemoto Container Co., Ltd.), and a cap (trade name: TOMIII Cap, material: PP white, outer diameter: diameter about 37 mm × 25 mm (oval), height: about 24 mm, manufactured by Takemoto Container Co., Ltd.).

[0063] The mist trigger container is not particularly limited as long as it can be filled with the liquid antiperspirant composition and can be appropriately selected depending on the purpose. Examples of the container include a bottle (product name: PH-100, material: natural PE, full capacity: approximately 100 mL, body diameter: diameter of approximately 40 mm, height: approximately 120 mm, manufactured by Kamimura Chemical Co., Ltd.) and a trigger (product name: Z-305, average diameter of spray hole: 0.45 mm, manufactured by Mitani Valve Co., Ltd.).

[0064] <Method of Manufacturing Liquid Antiperspirant Composition> The method for producing the liquid antiperspirant composition is not particularly limited and may be appropriately selected depending on the purpose, and may be produced, for example, by mixing the components (A), (B), and (C), and further, if necessary, the other components, and water (the remainder being blended so that the total of the liquid antiperspirant composition is 100% by mass). In producing the liquid antiperspirant composition, the components (A), (B), (C), and the other components may each be used alone in the preparation, or may be used in the form of a mixture containing two or more components.

[0065] A specific example of a method for producing the liquid antiperspirant composition is to add the component (C) to water and dissolve it uniformly, then add the component (A) and dissolve it uniformly, and then add the component (B) and other components after dissolving them uniformly, mix and dissolve them uniformly to obtain the liquid antiperspirant composition.

[0066] The apparatus for preparing the antiperspirant composition is not particularly limited and can be appropriately selected depending on the purpose. For example, there is a stirring apparatus equipped with a plurality of stirring blades (propeller, turbine, disperser, etc.) capable of shearing and total mixing.

[0067] -Applications- The liquid antiperspirant composition of the present invention has a good antiperspirant effect and its durability, and therefore can be used widely in cosmetics, medicines, quasi-drugs, etc., and can be more suitably used in antiperspirants, deodorants, antiperspirant deodorants, and deodorants. EXAMPLES

[0068] The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples in any way.

[0069] The content of each component described in the examples and comparative examples shown in Tables 1 to 4 is shown in mass %, and all values ​​are calculated as pure contents.

[0070] (Examples 1 to 19 and Comparative Examples 1 to 3) <Preparation of Liquid Antiperspirant Composition> The liquid antiperspirant compositions of Examples 1 to 19 and Comparative Examples 1 to 3, having the compositions shown in Tables 1 to 4 below, were prepared by a conventional method. Specifically, the component (C) was added to water and dissolved uniformly, and then the component (A) was added and dissolved uniformly. Thereafter, the component (B) and other components were dissolved uniformly and added, mixed and dissolved uniformly to obtain liquid antiperspirant compositions. 40 mL of each of the obtained liquid antiperspirant compositions was filled into a roll-on container having the following specifications to prepare a roll-on type antiperspirant.

[0071] <Roll-on container> <<Bottle>> Manufactured by Yoshino Kogyo Co., Ltd. Material: HDPE Natural, Full capacity: Approx. 56mL, Body diameter: Approx. 33mm, Height: Approx. 87mm <<Ring>> Manufactured by Yoshino Kogyo Co., Ltd. Material: LLDPE Natural, Outer diameter: Approx. 26mm, Height: Approx. 18mm <<Ball>> Manufactured by Yoshino Kogyo Co., Ltd. Material: White PP, Diameter: Approx. 20 mm

[0072] Next, each of the obtained roll-on type liquid antiperspirant compositions was evaluated and judged as follows. The results are shown in Tables 1 to 4.

[0073] <Evaluation of antiperspirant effect> 30 μL of each liquid antiperspirant composition was applied as a sample to a 1.5 cm square area on the inside of the forearm of nine expert panelists, and the sample was allowed to acclimate for 15 minutes under an environment of 38° C. and 40% relative humidity. After that, the amount of sweating in the sample-applied area and the sample-unapplied area was measured using a sweat meter (product name: SKN-2000, manufactured by Nishizawa Electric Instruments Manufacturing Co., Ltd.), and the antiperspirant rate was calculated from the following formula. The "antiperspirant effect" was evaluated based on the average results of the nine expert panelists, according to the following evaluation criteria. (Formula) Sweat control rate (%) = [Sweat amount of unapplied area (mg / min) - Sweat amount of sample applied area (mg / min)] / Sweat amount of unapplied area (mg / min) x 100 -Judgment criteria- ◎: High antiperspirant effect (antiperspirant rate is 50% or more) ○: Slightly high antiperspirant effect (antiperspirant rate is 30% or more but less than 50%) △: Slightly low antiperspirant effect (antiperspirant rate is between 10% and 30%) ×: Low antiperspirant effect (antiperspirant rate is less than 10%)

[0074] <Evaluation of the durability of antiperspirant effect> Nine expert panelists applied 0.4 g of each liquid antiperspirant composition to the armpits, dried, and then exercised on an exercise bike (registered trademark) for 30 minutes under high temperature conditions (38°C, 40% RH environment). After 3 hours, the panelists returned to the same temperature and humidity environment and exercised on the exercise bike (registered trademark) for 30 minutes. The "durability of antiperspirant effect" was evaluated based on the following evaluation criteria. -Evaluation criteria- ◎: The antiperspirant effect is highly durable (8 or more people answered that the antiperspirant effect is durable) ○: The antiperspirant effect is somewhat durable (the number of people who answered "the antiperspirant effect is durable" is 5 to 7) △: The antiperspirant effect is not very durable (3 to 4 people answered that the antiperspirant effect is durable) ×: The antiperspirant effect is not durable (2 or fewer people answered that the antiperspirant effect is durable)

[0075] <No tightness on the skin> Nine expert panelists applied 0.4 g of each liquid antiperspirant composition to the armpits and, after drying, evaluated "absence of tightness of the skin" based on the following evaluation criteria. -Evaluation criteria- ◎: No tightness on the skin (8 or more people answered "no tightness on the skin") ○: Skin does not feel tight (Number of people who answered "skin does not feel tight" is 5 to 7) △: Skin feels a little tight (The number of people who answered "Skin does not feel tight" was 3 to 4) ×: Skin feels tight (less than 2 people answered "Skin does not feel tight")

[0076] <Appearance of the agent> 50 g of each liquid antiperspirant composition was placed in a glass vial, and the appearance was observed at room temperature (25°C), and the "appearance of the agent" was evaluated based on the following evaluation criteria. Note that there were five samples, and when the evaluation results differed for each sample, the poorest evaluation result was used. -Evaluation criteria- ◎: The appearance of the agent is good (transparent liquid) ○: The appearance of the agent is somewhat good (it is a translucent liquid) △: Appearance of the agent is slightly poor (it is a cloudy liquid) ×: The appearance of the agent is poor (it is in a liquid state with precipitates).

[0077] <Skin irritation> Nine expert panelists (sensitive skin panelists) applied 0.4 g of each liquid antiperspirant composition to the inside of the forearm, and then evaluated "freedom of skin irritation" based on the following evaluation criteria. -Evaluation criteria- ◎: Eight or more people answered that it did not cause skin irritation ○: The number of people who answered "There is no skin irritation" is 6 to 7 △: The number of people who answered "There is no skin irritation" is 4 to 5 ×: The number of people who answered "There is no skin irritation" is 3 or less

[0078] [Table 1]

[0079] [Table 2]

[0080] [Table 3]

[0081] [Table 4]

[0082] Details of each component used in the examples and comparative examples are shown in Table 5 below.

[0083] [Table 5] [Industrial Applicability]

[0084] The liquid antiperspirant composition of the present invention has an excellent antiperspirant effect and its durability, does not cause a feeling of tightness on the skin after application, is free of skin irritation, and has an excellent appearance as a preparation, and therefore can be applied to, for example, cosmetics, pharmaceuticals, quasi-drugs, and the like, and can be suitably used as an antiperspirant, deodorant, antiperspirant deodorant, deodorant, and the like.

Claims

1. (A) at least one selected from an aluminum halide hydrate or a complex thereof, and an aluminum halide; (B) at least one selected from an α-hydroxy acid, an alkali metal salt of an α-hydroxy acid, an alkaline earth metal salt of an α-hydroxy acid, an amine salt of an α-hydroxy acid, and an ammonium salt of an α-hydroxy acid; (C) a water-soluble inorganic salt other than an aluminum salt; A liquid antiperspirant composition comprising:

2. 2. The liquid antiperspirant composition according to claim 1, wherein a mass ratio of the content of said (B) to the content of said (C) [(B) / (C)] is 0.9 or more and 50 or less.

3. the content of (A) is 10% by mass or more and 15% by mass or less based on the total amount of the liquid antiperspirant composition, the content of (B) is 0.45% by mass or more and 3% by mass or less based on the total amount of the liquid antiperspirant composition, 3. The liquid antiperspirant composition according to claim 1, wherein the content of (C) is 0.1% by mass or more and 0.7% by mass or less, based on the total amount of the liquid antiperspirant composition.

4. 3. The liquid antiperspirant composition according to claim 1, which is any one selected from the group consisting of a roll-on type, a lotion type, and a mist type.

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