Liquid antiperspirant composition

Abstract

To provide a liquid antiperspirant composition having excellent persistence of the antiperspirant effect, no white precipitation after application, no tightness of the skin after application and high temperature stability.SOLUTION: There is provided a liquid antiperspirant composition which comprises a copolymer containing as monomer units (a) at least one selected from an aluminum halide hydrate or its complex and aluminum halide, (b) at least one selected from glycerins and a trivalent or higher valent sugar alcohol and (C) at least one selected from monoalkyl maleate having an alkyl group having 1 to 4 carbon atoms, alkylacrylamide having an alkyl group having 1 to 8 carbon atoms, an alkyl acrylate having an alkyl group having 4 or more carbon atoms, diacetoneacrylamide, vinylpyrrolidone and ethylbetaine methacrylate; or a salt thereof, wherein the mass ratio [(A) / (B)] of the content of the (A) to the content of the [B] is 1 or more and 7 or less.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 (ACH) have been widely used. For example, an antiperspirant composition containing aluminum chlorohydrate (ACH) and a vinyl-type anionic polymer has been proposed for the purpose of improving the antiperspirant effect and the durability of the antiperspirant effect (see Patent Document 1).

[0003] However, in conventional antiperspirant compositions including those in Patent Document 1, there was a concern that the white precipitation derived from aluminum chlorohydrate or a film-forming component contained in the antiperspirant composition would impair the skin appearance after application. In addition, in the armpits, there are many obstacles such as common hair follicles (so-called razor burn) that occur after shaving, uneven pores like skin rash, and hair that is starting to grow, and the friction between the skin and the skin is more severe than in other parts, so it is difficult to form a uniform film derived from the antiperspirant composition, and there was a concern that the antiperspirant effect is difficult to sustain. Furthermore, there was room for improvement in various performances required for antiperspirant compositions, such as the skin condition after application (lack of tightness of the skin) and the formulation stability in a high-temperature environment. Accordingly, a satisfactory liquid antiperspirant composition that exhibits long-lasting antiperspirant effect, does not produce white precipitation after application, does not cause skin tightness after application, and is excellent in high-temperature stability 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] JP 2015-117239 A 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 a long-lasting antiperspirant effect, does not produce white precipitation after application, does not cause a tight feeling on the skin after application, and is excellent in high-temperature stability. [Means for solving the problem]

[0006] The liquid antiperspirant composition of the present invention contains (A) at least one selected from aluminum halide hydrates or complexes thereof, and aluminum halides, (B) at least one selected from glycerins and tri- or higher hydric sugar alcohols, and (C) a copolymer or a salt thereof containing, as monomer units, at least one selected from monoalkyl maleates whose alkyl group has 1 to 4 carbon atoms, alkylacrylamides whose alkyl group has 1 to 8 carbon atoms, alkyl acrylates whose alkyl group has 4 or more carbon atoms, diacetone acrylamide, vinylpyrrolidone, and ethyl betaine methacrylate, wherein the mass ratio [(A) / (B)] of the content of (A) to the content of (B) is 1 or more and 7 or less.

[0007] The present invention is based on the findings of 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 glycerins and trihydric or higher sugar alcohols, (C) a copolymer or a salt thereof containing, as a monomer unit, at least one selected from the group consisting of monoalkyl maleate having an alkyl group with 1 to 4 carbon atoms, alkylacrylamide having an alkyl group with 1 to 8 carbon atoms, alkyl acrylate having an alkyl group with 4 or more carbon atoms, diacetone acrylamide, vinylpyrrolidone, and ethyl betaine methacrylate, The liquid antiperspirant composition is characterized in that the mass ratio of the content of (A) to the content of (B) [(A) / (B)] is 1 or more and 7 or less. <2> a mass ratio of the content of (A) to the content of (C) [(A) / (C)] is 4.0 or more and 150 or less; <1> The liquid antiperspirant composition according to claim 1, <3> The (C) is at least one selected from the group consisting of an (acrylates / diacetoneacrylamide) copolymer or a salt thereof, an (acrylates / alkyl (C1-18) acrylate / alkyl (C1-8) acrylamide) copolymer or a salt thereof, and a (vinyl methyl ether / ethyl maleate) copolymer or a salt thereof. <1> or the above <2> The liquid antiperspirant composition according to claim 1, <4> the content of (A) is 7.5% by mass or more and 12.5% ​​by mass or less based on the total amount of the liquid antiperspirant composition, the content of (B) is 2.5% by mass or more and 6.0% by mass or less based on the total amount of the liquid antiperspirant composition, The content of the (C) is 0.25% by mass or more and 1.0% by mass or less based on the total amount of the liquid antiperspirant composition. <1> From the above <3> The liquid antiperspirant composition according to any one of claims 1 to 5, <5> The cosmetic composition is any one selected from a roll-on type, a lotion type, and a mist type. <1> From the above <4> 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 excellent durability of antiperspirant effect, does not produce white precipitation after application, does not cause a tight feeling on the skin after application, and is stable at high temperatures. 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 aluminum halide hydrates or complexes thereof, and aluminum halides, (B) at least one selected from glycerins and tri- or higher hydric sugar alcohols, and (C) a copolymer or a salt thereof containing, as monomer units, at least one selected from monoalkyl maleates whose alkyl group has 1 to 4 carbon atoms, alkylacrylamides whose alkyl group has 1 to 8 carbon atoms, alkyl acrylates whose alkyl group has 4 or more carbon atoms, diacetone acrylamide, vinylpyrrolidone, and ethyl betaine methacrylate, and may contain other components as necessary. In this specification, "(A) at least one selected from aluminum halide hydrates or complexes thereof, and aluminum halides" may be referred to as "(A)" or "component (A)", "(B) at least one selected from glycerins and trivalent or higher sugar alcohols" may be referred to as "(B)" or "component (B)", and "(C) a copolymer or a salt thereof containing, as a monomer unit, at least one selected from monoalkyl maleates whose alkyl group has 1 to 4 carbon atoms, alkylacrylamides whose alkyl group has 1 to 8 carbon atoms, alkyl acrylates whose alkyl group has 4 or more carbon atoms, diacetone acrylamide, vinylpyrrolidone, and ethyl betaine methacrylate" may be referred to as "(C)" or "component (C)".

[0010] The combined use of the (A) component and the (B) component improves the durability of the antiperspirant effect and improves the appearance defect caused by white precipitation after application of the liquid antiperspirant composition. The combined use of the (C) component, which is a specific polymer, further improves the durability of the antiperspirant effect.

[0011] <(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.

[0012] 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 durability in terms of antiperspirant effect. These may be used alone or in combination of two or more.

[0013] 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).

[0014] The content of the component (A) is not particularly limited and can be appropriately selected depending on the purpose. From the viewpoints of obtaining a good antiperspirant effect and of preventing a feeling of tightness on the skin after application of the liquid antiperspirant composition, the content is preferably from 6% by mass to 15% by mass, and more preferably from 7.5% by mass to 12.5% ​​by mass, relative to 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 leads to good durability of the antiperspirant effect. When the content of the component (A) is 15% by mass or less relative to the total amount of the liquid antiperspirant composition, this is preferable because it results in a satisfactory lack of tightness on the skin after application of the liquid antiperspirant composition and a satisfactory lack of white precipitation after application of the liquid antiperspirant composition.

[0015] <(B) At least one selected from glycerins and trihydric or higher sugar alcohols> The component (B) is contained mainly for the purposes of imparting a sustained antiperspirant effect, an effect of inhibiting white precipitation after application of the liquid antiperspirant composition, no feeling of tightness on the skin after application of the liquid antiperspirant composition, and no dryness on the skin after application of the liquid antiperspirant composition.

[0016] The glycerin compounds are not particularly limited and can be appropriately selected depending on the purpose. Examples of the glycerin compounds include glycerin, diglycerin, and polyglycerin.

[0017] The sugar alcohol is not particularly limited as long as it is trivalent or higher and can be appropriately selected depending on the purpose. Examples of the sugar alcohol include sorbitol, erythritol, mannitol, lactitol, xylitol, and maltitol.

[0018] Among these, from the viewpoints of the durability of the antiperspirant effect and the effect of suppressing white precipitation after application of the liquid antiperspirant composition, glycerin, diglycerin, polyglycerin, and sorbitol are preferred.

[0019] The component (B) may be an appropriately synthesized product or a commercially available product. Commercially available products of the component (B) include, for example, trade names of concentrated glycerin for cosmetics (manufactured by Sakamoto Pharmaceutical Industry Co., Ltd., glycerin), Japanese Pharmacopoeia glycerin (manufactured by Sakamoto Pharmaceutical Industry Co., Ltd., glycerin), diglycerin 801 (manufactured by Sakamoto Pharmaceutical Industry Co., Ltd., diglycerin), diglycerin S (manufactured by Sakamoto Pharmaceutical Industry Co., Ltd., diglycerin), polyglycerin #310 (manufactured by Sakamoto Pharmaceutical Industry Co., Ltd., polyglycerin), polyglycerin #500 (manufactured by Sakamoto Pharmaceutical Industry Co., Ltd., polyglycerin), polyglycerin #750 (manufactured by Sakamoto Pharmaceutical Industry Co., Ltd., polyglycerin), and the like. Examples of such products include glycerin, PGL-S (manufactured by Sakamoto Pharmaceutical Co., Ltd., polyglycerin), Sorbitol D-70 (manufactured by Mitsubishi Corporation Life Sciences Ltd., sorbitol), Sorbitol S (manufactured by Bussan Food Science Co., Ltd., sorbitol), D-mannitol (manufactured by Bussan Food Science Co., Ltd., mannitol), xylitol (manufactured by Bussan Food Science Co., Ltd., xylitol), erythritol (manufactured by Bussan Food Science Co., Ltd., erythritol), and Malbit (manufactured by Bussan Food Science Co., Ltd., maltitol).

[0020] The content of the component (B) is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoints of achieving a good durability of the antiperspirant effect, an effect of suppressing white precipitation after application of the liquid antiperspirant composition, and no feeling of tightness on the skin after application of the liquid antiperspirant composition, the content is preferably from 2 to 10% by mass, and more preferably from 2.5 to 6.0% by mass, relative to the total amount of the liquid antiperspirant composition. It is preferable for the content of the component (B) to be 2 mass % or more relative to the total amount of the liquid antiperspirant composition, since this leads to a good durability of the antiperspirant effect, a good effect of suppressing white precipitation after application of the liquid antiperspirant composition, and a good lack of tightness on the skin after application of the liquid antiperspirant composition. If the content of the component (B) is 10% by mass or less based on the total amount of the liquid antiperspirant composition, the appearance of the preparation in a high-temperature environment will be good, that is, high-temperature stability will be good, which is preferable.

[0021] <(C) A copolymer or a salt thereof containing, as a monomer unit, at least one selected from monoalkyl maleate having an alkyl group with 1 to 4 carbon atoms, alkylacrylamide having an alkyl group with 1 to 8 carbon atoms, alkyl acrylate having an alkyl group with 4 or more carbon atoms, diacetone acrylamide, vinylpyrrolidone, and ethyl methacrylate betaine> The component (C) is contained mainly to provide a sustained antiperspirant effect and an effect of inhibiting white precipitation after application of the liquid antiperspirant composition.

[0022] The copolymer or salt thereof containing, as a monomer unit, a monoalkyl maleate having an alkyl group with 1 to 4 carbon atoms is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include a (vinyl methyl ether / ethyl maleate) copolymer or a salt thereof, and a (vinyl methyl ether / butyl maleate) copolymer or a salt thereof.

[0023] The copolymer or salt thereof containing, as a monomer unit, an alkylacrylamide having an alkyl group with 1 to 8 carbon atoms is not particularly limited and can be appropriately selected depending on the purpose. Examples of the copolymer or salt thereof include an (acrylates / alkyl (C1-18) acrylate / alkyl (C1-8) acrylamide) copolymer or a salt thereof.

[0024] The copolymer or salt thereof containing, as a monomer unit, an alkyl acrylate having an alkyl group with 4 or more carbon atoms is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include an alkyl acrylate copolymer or a salt thereof. The alkyl acrylate copolymer is a copolymer in which alkyl acrylates having different alkyl chain lengths are combined.

[0025] Examples of the copolymer containing diacetone acrylamide as a monomer unit or a salt thereof include an (acrylates / diacetone acrylamide) copolymer or a salt thereof.

[0026] Examples of the copolymer containing vinylpyrrolidone as a monomer unit or a salt thereof include a (vinylpyrrolidone / vinyl acetate) copolymer or a salt thereof.

[0027] Examples of the copolymer containing ethyl betaine methacrylate as a monomer unit or a salt thereof include an (ethyl betaine methacrylate / acrylates) copolymer or a salt thereof.

[0028] Among these, from the viewpoints of durability of the antiperspirant effect, suppression of white precipitation after application of the liquid antiperspirant composition, and good application properties, a (vinyl methyl ether / ethyl maleate) copolymer or a salt thereof, a (vinyl methyl ether / butyl maleate) copolymer or a salt thereof, an (acrylates / alkyl (C1-18) acrylate / alkyl (C1-8) acrylamide) copolymer or a salt thereof, an (acrylates / diacetone acrylamide) copolymer or a salt thereof, a (vinyl pyrrolidone / vinyl acetate) copolymer or a salt thereof, and an ethyl betaine methacrylate / acrylates) copolymer or a salt thereof are preferred, and a (vinyl methyl ether / ethyl maleate) copolymer or a salt thereof, a (vinyl methyl ether / butyl maleate) copolymer or a salt thereof, an (acrylates / alkyl (C1-18) acrylate / alkyl (C1-8) acrylamide) copolymer or a salt thereof, and an (acrylates / diacetone acrylamide) copolymer or a salt thereof are more preferred.

[0029] The copolymer or salt thereof as component (C) may be an unneutralized copolymer as it is, or a neutralized salt as it is. The copolymer may be converted into a salt using any alkali agent, or the salt may be desalted using any acid.

[0030] The alkaline agent is not particularly limited and can be appropriately selected depending on the purpose, and examples thereof include ammonium, 2-amino-2-methyl-1-propanol (hereinafter sometimes referred to as "AMP"), 2-amino-2-methyl-1,3-propanediol (hereinafter sometimes referred to as "AMPD"), etc. Among these, AMP is preferable. These may be used alone or in combination of two or more.

[0031] The acid is not particularly limited and can be appropriately selected depending on the purpose. Examples of the acid include hydrochloric acid and sulfuric acid. These may be used alone or in combination of two or more.

[0032] The desalting method is not particularly limited and can be appropriately selected from known methods. For example, the following methods can be mentioned. [Examples of desalination methods] 1 g of (acrylates / alkyl (C1-18) acrylates / alkyl (C1-8) acrylamide) copolymer AMP can be dissolved in 4 g of 95% by mass ethanol, and 65 μL of hydrochloric acid is added thereto for desalting to obtain (acrylates / alkyl (C1-18) acrylates / alkyl (C1-8) acrylamide) copolymer.

[0033] The component (C) may be an appropriately synthesized product or a commercially available product. Commercially available products of the component (C) include, for example, trade names such as GANTREZ ES-225 (manufactured by Ashland Japan Co., Ltd., (vinyl methyl ether / ethyl maleate) copolymer), GANTREZ SP-215 (manufactured by Ashland Japan Co., Ltd., (vinyl methyl ether / ethyl maleate) copolymer), GANTREZ ES-425 (manufactured by Ashland Japan Co., Ltd., (vinyl methyl ether / butyl maleate) copolymer), PLUSSIZE L-9909B (manufactured by GOO Chemical Industry Co., Ltd., (acrylates / alkyl acrylate (C1-18) / alkyl (C1-8) acrylamide) copolymer), PLUSSIZE L-9909 (manufactured by GOO Chemical Industry Co., Ltd., (acrylates / alkyl acrylate (C1-18) / alkyl (C1-8) acrylamide) copolymer), PLUSSIZE Examples include L-6740B (manufactured by GOO Chemical Industry Co., Ltd., (acrylates / alkyl acrylate (C1-18) / alkyl (C1-8) acrylamide) copolymer), Aniset NF-1000 (manufactured by Osaka Organic Chemical Industry Co., Ltd., alkyl acrylate copolymer), Pluscise L-6330 (manufactured by GOO Chemical Industry Co., Ltd., (acrylates / diacetone acrylamide) copolymer AMP), PVP / VA S-630 (manufactured by Ashland Japan Co., Ltd., (vinyl pyrrolidone / vinyl acetate) copolymer), and Yukaformer R205S (manufactured by Mitsubishi Chemical Corporation, (ethyl betaine methacrylate / acrylates) copolymer).

[0034] The content of the component (C) is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoints of achieving a good durability of the antiperspirant effect, an effect of suppressing white precipitation after application of the liquid antiperspirant composition, and no feeling of tightness on the skin after application of the liquid antiperspirant composition, the content is preferably from 0.1% by mass to 1.5% by mass, and more preferably from 0.25% by mass to 1.0% by mass, relative to the total amount of the liquid antiperspirant composition. It is preferable for the content of the component (C) to be 0.1% by mass or more based on the total amount of the liquid antiperspirant composition, since this leads to a good durability of the antiperspirant effect and a good effect of suppressing white precipitation after application of the liquid antiperspirant composition. When the content of the component (C) is 1.5% by mass or less, based on the total amount of the liquid antiperspirant composition, the effect of suppressing white precipitation after application of the liquid antiperspirant composition is favorable, and the absence of a feeling of tightness on the skin after application of the liquid antiperspirant composition is favorable.

[0035] <Mass ratio [(A) / (B)]> In this specification, the mass ratio [(A) / (B)] of the content of the component (A) to the content of the component (B) is sometimes referred to as the "mass ratio [(A) / (B)]". In the present invention, the mass ratio [(A) / (B)] is 1 or more and 7 or less. Moreover, the mass ratio [(A) / (B)] is preferably 2 or more and 5 or less, from the viewpoints of sustaining the antiperspirant effect, suppressing white precipitation after application of the liquid antiperspirant composition, preventing a feeling of tightness on the skin after application of the liquid antiperspirant composition, and achieving good high-temperature stability. When the mass ratio [(A) / (B)] is 1 or more, the appearance of the preparation in a high-temperature environment becomes good, that is, the high-temperature stability becomes good, which is preferable. It is preferable for the mass ratio [(A) / (B)] to be 7 or less since this leads to a good durability of the antiperspirant effect, a good effect of suppressing white precipitation after application of the liquid antiperspirant composition, and a good lack of tightness on the skin after application of the liquid antiperspirant composition.

[0036] <Mass ratio [(A) / (C)]> In this specification, the mass ratio [(A) / (C)] of the content of the component (A) to the content of the component (C) is sometimes referred to as the "mass ratio [(A) / (C)]". The mass ratio [(A) / (C)] is preferably 4 or more and 150 or less, and more preferably 6 or more and 50 or less, from the viewpoints of maintaining the antiperspirant effect and preventing the skin from feeling tight after application of the liquid antiperspirant composition. It is preferable for the mass ratio [(A) / (C)] to be 4 or more, since this results in a good lack of tightness on the skin after application of the liquid antiperspirant composition. It is preferable that the mass ratio [(A) / (C)] is 150 or less since the antiperspirant effect is durable.

[0037] <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 other than the component (B), surfactants, chelating agents, antioxidants, pH adjusters, plant extracts, freshening agents, colorants, fragrances, viscosity adjusters, water or solvents, etc. These may be used alone or in combination of two or more.

[0038] 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.

[0039] 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.

[0040] 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 and cyclodextrin are preferred as the deodorizing component. These may be used alone or in combination of two or more.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] The polyhydric alcohol other than the component (B) is contained mainly to impart a feeling of touch (smooth feeling and moist feeling). The polyhydric alcohol other than the component (B) 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, ethylene glycol, polyethylene glycol, etc. Among these, polyethylene glycol is preferred. These may be used alone or in combination of two or more.

[0047] The content of the polyhydric alcohol other than the component (B) 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, relative to the total amount of the liquid antiperspirant composition.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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, and examples thereof include citric acid, trisodium citrate, phosphoric acid, lactic acid, succinic acid, tartaric acid, sodium hydroxide, potassium hydroxide, etc. Among these, citric acid and trisodium citrate are preferred. These may be used alone or in combination of two or more.

[0055] 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.

[0056] 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 perforatum extract, apricot kernel extract, saxifrage extract, coix seed extract, persimmon tannin extract, peppermint oil, peppermint oil, fermented rice extract, and angelica extract, etc. Among these, rosemary extract, eucalyptus extract, and fermented rice extract are preferred. These may be used alone or in combination of two or more.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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, hydroxypropyl methyl cellulose, and hydrophobized hydroxypropyl methyl cellulose.

[0063] 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.

[0064] 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, ethanol, 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.

[0065] -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 from the standpoint of antiperspirant effect and appearance of the agent, it is preferably 3.0 to 5.5.

[0066] -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.

[0067] -Dosage form- The formulation of the liquid antiperspirant composition is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include liquid types, gel types, etc. Among these, the liquid type is preferred because it is effective for the manifestation of effects when applied to the skin in a state dissolved in water, and it can be applied with high adhesion and manifests a high effect.

[0068] Examples of the liquid type include roll-on type, mist type, lotion type, etc. Among these, the roll-on type is preferred from the viewpoint of antiperspirant effect. The gel type includes, for example, a gel type.

[0069] 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.

[0070] -container- Examples of containers that can be used for each of the above types include roll-on containers, bottle containers for gels, 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.

[0071] 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.).

[0072] The bottle container for gel 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 bottle container for gel include containers consisting of a bottle (product name: TOMII, material: HDPE natural, full capacity: about 34 mL, body diameter: diameter about 39 mm × 24 mm (oval), height: about 76 mm, manufactured by Takemoto Container Co., Ltd.), an inner stopper (product name: Nozzle B for TO Cap, material: PE natural, outer diameter: about 12 mm, height: about 13 mm, manufactured by Takemoto Container Co., Ltd.), and a cap (product name: TO Cap, material: AS / PP white, outer diameter: diameter about 37 mm × 23 mm (oval), height: about 22 mm, manufactured by Takemoto Container Co., Ltd.).

[0073] 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.).

[0074] 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.).

[0075] <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, as necessary, the other components, and a solvent such as ethanol or water (the remainder being blended so that the total of the liquid antiperspirant composition is 100 mass %). When 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.

[0076] A specific example of a method for producing the liquid antiperspirant composition includes a method in which the components (A) and (B) are added to water and uniformly dissolved, and then ethanol in which the component (C) has been uniformly dissolved is added, followed by mixing and uniform dissolution to obtain the liquid antiperspirant composition.

[0077] The device for preparing the liquid antiperspirant composition is not particularly limited and can be appropriately selected depending on the purpose. Examples of the device include a stirring device equipped with a plurality of stirring blades (propellers, turbines, dispersers, etc.) capable of shearing and total mixing.

[0078] -Applications- The liquid antiperspirant composition of the present invention is excellent in terms of the durability of the antiperspirant effect, the absence of white precipitation after application, the absence of a feeling of tightness on the skin after application, and high-temperature stability, and therefore can be used widely in cosmetics, pharmaceuticals, quasi-drugs, and the like, and can be more suitably used in antiperspirants, deodorants, antiperspirant deodorants, and deodorants. EXAMPLES

[0079] 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.

[0080] The content of each component described in the examples and comparative examples shown in Tables 1 to 5 is shown in mass %, and all values ​​are calculated as pure contents.

[0081] (Examples 1 to 20 and Comparative Examples 1 to 10) <Preparation of Liquid Antiperspirant Composition> The liquid antiperspirant compositions of Examples 1 to 20 and Comparative Examples 1 to 10, having the compositions shown in Tables 1 to 5 below, were prepared by a conventional method. Specifically, the component (A) and the component (B) were added to water and uniformly dissolved, and then ethanol in which the component (C) had been uniformly dissolved was added, followed by mixing and uniform dissolution to obtain each liquid antiperspirant composition. 40 mL of each of the obtained liquid antiperspirant compositions was filled into a roll-on container having the following specifications to give roll-on type liquid antiperspirant compositions.

[0082] <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 Kogyosho Co., Ltd. Material: White PP, Diameter: Approx. 20 mm

[0083] 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 5.

[0084] <Evaluation of the durability of antiperspirant effect> In the morning, 0.3 g of each liquid antiperspirant composition was applied to the armpits of nine expert panelists, and the amount of sweating was measured after 10 hours. During the test, sweating was promoted by exercising for 20 minutes in an environment of 38°C and relative humidity of 40%. Based on the amount of sweating, the antiperspirant rate was calculated using the following formula. The "durability of antiperspirant effect" was evaluated based on the average antiperspirant rate 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 -Evaluation criteria- ◎: High antiperspirant effect (antiperspirant rate is 60% or more) ○: Slightly high antiperspirant effect (antiperspirant rate is between 45% and 60%) △: Slightly low antiperspirant effect (antiperspirant rate is between 20% and 45%) ×: Low antiperspirant effect (antiperspirant rate is less than 20%)

[0085] <Evaluation of the effect of suppressing white precipitation after application> 0.8 g of each liquid antiperspirant composition was applied to an 8 cm × 8 cm piece of artificial leather (Suprale: manufactured by Idemitsu Technofine Co., Ltd.) and dried for 3 hours at 25° C. The artificial leather piece was visually observed for the absence of whitening and evaluated according to the following evaluation criteria. -Evaluation criteria- ◎: Almost no cracks and no white precipitation ○: Some cracks are observed, but there is almost no white precipitation. △: Cracks are observed in some areas, and thin white precipitates are present overall, or white precipitates are present in some areas ×: Numerous cracks and white precipitation overall

[0086] <Evaluation of skin tightness after application> 0.4 g of each liquid antiperspirant composition was applied to the armpits of nine expert panelists, and after drying, the "absence of tightness of the skin" was evaluated based on the following evaluation criteria. -Evaluation criteria- ◎: No tightness on the skin (7 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 6) △: Skin feels a little tight (2 to 4 people answered "Skin does not feel tight") ×: Skin feels tight (less than 1 person answered "Skin does not feel tight")

[0087] <Evaluation of high temperature stability> 30 g of each liquid antiperspirant composition was placed in a glass vial and stored at high temperature (60°C) for 14 days, after which the appearance was visually observed and the "high temperature stability" was evaluated according to the following evaluation criteria. The number of samples was one. -Evaluation criteria- ◎: The appearance of the agent is very good (no separation, precipitation or sedimentation) ○: Appearance of the agent is good (separation and some turbidity are observed, but disperses when shaken) ×: The appearance of the agent is poor (the agent does not separate (disperse) or the entire agent is cloudy)

[0088] [Table 1]

[0089] [Table 2]

[0090] [Table 3]

[0091] [Table 4]

[0092] [Table 5]

[0093] (Prescription Examples 1-8) Liquid antiperspirant compositions having the compositions and contents shown in Tables 6 to 7 below were prepared in the same manner as in Example 1.

[0094] [Table 6]

[0095] [Table 7]

[0096] Details of each component used in the above examples, comparative examples, and formulation examples are shown in Table 8 below.

[0097] [Table 8] [Industrial Applicability]

[0098] The liquid antiperspirant composition of the present invention is excellent in the durability of the antiperspirant effect, the absence of white precipitation after application, and the absence of a feeling of tightness on the skin after application, as well as in high-temperature stability, and therefore can be used widely in, for example, cosmetics, pharmaceuticals, quasi-drugs, and the like, and can be suitably used as an antiperspirant, deodorant, antiperspirant deodorant, deodorant, etc.

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 glycerins and trihydric or higher sugar alcohols, (C) a copolymer or a salt thereof containing, as a monomer unit, at least one selected from the group consisting of monoalkyl maleate having an alkyl group with 1 to 4 carbon atoms, alkylacrylamide having an alkyl group with 1 to 8 carbon atoms, alkyl acrylate having an alkyl group with 4 or more carbon atoms, diacetone acrylamide, vinylpyrrolidone, and ethyl betaine methacrylate, A liquid antiperspirant composition, wherein the mass ratio [(A) / (B)] of the content of (A) to the content of (B) is 1 or more and 7 or less.

2. 2. The liquid antiperspirant composition according to claim 1, wherein a mass ratio of the content of said (A) to the content of said (C) [(A) / (C)] is 4.0 or more and 150 or less.

3. 3. The liquid antiperspirant composition according to claim 1, wherein (C) is at least any one selected from the group consisting of an acrylates / diacetoneacrylamide copolymer or a salt thereof, an acrylates / alkyl (C1-18) acrylate / alkyl (C1-8) acrylamide copolymer or a salt thereof, and a vinyl methyl ether / ethyl maleate copolymer or a salt thereof.

4. the content of (A) is 7.5% by mass or more and 12.5% ​​by mass or less based on the total amount of the liquid antiperspirant composition, the content of (B) is 2.5% by mass or more and 6.0% 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 0.25% by mass or more and 1.0% by mass or less, based on the total amount of the liquid antiperspirant composition.

5. 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.

Images