Two-phase separation type liquid deodorant composition

Abstract

To provide a two-phase separation liquid deodorant agent composition that features dispersion persistence and ease of re-dispersion, delivering a refreshing feel of skin during its application and ensuring smooth skin and a long-lasting deodorizing effect after its application.SOLUTION: A two-phase separation liquid deodorant agent composition contains an oil phase and an aqueous phase. The oil phase contains (A-1) a silicone-based surfactant with an HLB of 10 or less, (A-2) a cellulose-based thickener, and (A-3) silicone with a kinematic viscosity of 50 mm2 / s or less at 25°C. The aqueous phase contains (B-1) water and (B-2) hydroxyalkylated cyclodextrin.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a two-phase separation type liquid deodorant composition. [Background technology]

[0002] Traditionally, deodorant compositions have been required to not only possess basic functions such as antiperspirant and deodorizing properties, but also to achieve a good skin condition after application (such as a dry feeling of the skin) and a good application feel (such as a refreshing feeling when applying the deodorant composition).

[0003] For example, in order to provide a cosmetic that can achieve a uniform emulsified state when mixed, in which the emulsion system quickly breaks down when applied to the skin, and in which the cosmetic has an excellent feel that melts into the skin, a cosmetic has been proposed in which an oil phase containing a specific fatty acid triglyceride and branched hydrocarbons is mixed with an aqueous phase containing a polysaccharide and / or polypeptide-based thickener, a nonionic surfactant with an HLB of 12 or higher, and water at the time of use (see, for example, Patent Document 1). Furthermore, in order to provide a cosmetic composition that is excellent in emulsification stability and long-term stability, and excellent in penetration and occlusion, a cosmetic composition has been proposed in which an oil phase containing a nonionic surfactant with an HLB of 8 to 12, at least one selected from ester oils that are liquid at 25°C and vegetable oils that are liquid at 25°C, and a hydrocarbon oil is mixed with an aqueous phase in a specific ratio (see, for example, Patent Document 2).

[0004] However, the proposal described in Patent Document 1 above does not mention the persistence of dispersion after emulsification, leaving room for improvement. Furthermore, the proposals described in Patent Documents 1 and 2 above do not mention a good application feel (a refreshing feeling on the skin) during use, leaving room for improvement. Therefore, conventional proposals, including those in the aforementioned Patent Documents 1 and 2, have not yet provided a product that is excellent in dispersion persistence and redispersibility, and that achieves a refreshing feeling on the skin when the composition is applied, a smooth feeling on the skin after application, and a deodorizing effect with long-lasting effects. There is a strong demand for such a product to be provided promptly. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2019-119701 [Patent Document 2] Japanese Patent Publication No. 2022-041954 [Overview of the project] [Problems that the invention aims to solve]

[0006] The present invention aims to solve the aforementioned problems of the conventional approach and achieve the following objectives. Specifically, the present invention aims to provide a two-phase separation type liquid deodorant composition that is excellent in dispersion persistence and redispersibility, and that is excellent in the refreshing feeling on the skin when the two-phase separation type liquid deodorant composition is applied, the smooth feeling on the skin after the application of the two-phase separation type liquid deodorant composition, and the deodorizing effect and its persistence. [Means for solving the problem]

[0007] The inventors have conducted diligent studies to achieve the above objectives and have found that the two-phase separation type liquid deodorant composition of the present invention is a two-phase separation type liquid deodorant composition comprising an oil phase and an aqueous phase, wherein the oil phase comprises (A-1) a silicone-based surfactant with an HLB of 10 or less, (A-2) a cellulose-based thickener, and (A-3) a kinematic viscosity of 50 mm at 25°C. 2It was discovered that by containing a silicone with a viscosity of 1 / s or less, and by having the aqueous phase contain (B-1) water and (B-2) hydroxyalkylated cyclodextrin, a two-phase separation type liquid deodorant composition can be obtained that exhibits excellent dispersion persistence and redispersibility, as well as excellent skin freshness when applied, skin dryness after application, and odor-preventing effect and its persistence.

[0008] The present invention is based on the aforementioned findings by the inventors, and the means for solving the aforementioned problems are as follows: <1> A two-phase separation type liquid deodorant composition comprising an oil phase and an aqueous phase, The oil phase is (A-1) A silicone-based surfactant with an HLB of 10 or less, (A-2) Cellulose-based thickener, (A-3) Kinematic viscosity at 25°C is 50 mm 2 It contains silicone that is less than or equal to / s, The aqueous phase, (B-1) Water and, (B-2) A two-phase separation type liquid deodorant composition characterized by containing hydroxyalkylated cyclodextrin. <2> The mass ratio of the content of (A-2) to the content of (B-2) [(A-2) / (B-2)] is 0.50 or more and 5.0 or less, <1> This is a two-phase separation type liquid deodorant composition as described above. <3> The content of (A-1) is 0.5% by mass or more and 2.5% by mass or less, relative to the total amount of the two-phase separation type liquid deodorant composition. The content of (A-2) is 0.3% by mass or more and 1.2% by mass or less, relative to the total amount of the two-phase separation type liquid deodorant composition. The content of (A-3) is 10% by mass or more and 25% by mass or less, relative to the total amount of the two-phase separation type liquid deodorant composition. The 2-phase separation type liquid deodorant composition according to any one of <1> to <2> above, wherein the content of the above (B-2) is 0.2% by mass or more and 1.0% by mass or less based on the total amount of the 2-phase separation type liquid deodorant composition. <4> The 2-phase separation type liquid deodorant composition according to any one of <1> to <3> above, wherein the oil phase contains a (B-3) antiperspirant component. <5> The 2-phase separation type liquid deodorant composition according to any one of <1> to <4> above, which suppresses body odor. <6> The 2-phase separation type liquid deodorant composition according to any one of <1> to <5> above, which is any one selected from a roll-on type and a lotion type.

Advantages of the Invention

[0009] According to the present invention, the above-mentioned various problems in the prior art can be solved, the above-mentioned object can be achieved, the dispersion persistence and redispersion property are excellent, and the feeling of freshness of the skin when applying the 2-phase separation type liquid deodorant composition, as well as the smooth feeling of the skin after applying the 2-phase separation type liquid deodorant composition, and the excellent anti-odor effect and its persistence, a 2-phase separation type liquid deodorant composition can be provided.

Embodiments for Carrying Out the Invention

[0010] (2-phase separation type liquid deodorant composition) The 2-phase separation type liquid deodorant composition of the present invention includes an oil phase and an aqueous phase, and may contain other components as necessary. In this specification, the "2-phase separation type liquid deodorant composition" may sometimes be simply referred to as the "liquid deodorant composition".

[0011] The "2-phase separation type" in this specification indicates the property of phase separation when standing still. That is, the 2-phase separation type liquid deodorant composition of the present invention is a liquid deodorant composition that separates into two phases, an oil phase and an aqueous phase, when standing still. Because the two-phase separation occurs during standing, the two-phase separation type liquid deodorant composition can be used immediately after mixing (e.g., shaking or stirring) to emulsify (re-emulsify) it on the spot. The two-phase separation type liquid deodorant composition obtained in this way is preferable because it can be prepared on the spot, thus solving problems such as separation and aggregation of each component that may occur over time.

[0012] <Oil phase> The oil phase comprises (A-1) a silicone-based surfactant with an HLB of 10 or less, (A-2) a cellulose-based thickener, and (A-3) a kinematic viscosity of 50 mm at 25°C. 2 It contains silicone with a viscosity of / s or less, and may contain other components as needed. In this specification, "(A-1) Silicone-based surfactant with HLB of 10 or less" may be referred to as "(A-1)" or "(A-1) component," and "(A-2) Cellulose-based thickener" may be referred to as "(A-2)" or "(A-2) component," and "(A-3) Kinematic viscosity at 25°C of 50 mm²" may be referred to as "(A-3) Kinematic viscosity at 25°C of 50 mm²." 2 Silicone with a viscosity of 0.2 / s or less is sometimes referred to as "(A-3)" or "(A-3) component".

[0013] <<(A-1) Silicone-based surfactants with an HLB of 10 or less>> The aforementioned component (A-1) is included primarily to provide redispersibility and dispersion persistence.

[0014] The aforementioned (A-1) component is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of improving redispersibility and dispersion persistence, PEG (polyethylene glycol)-3 dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, PEG-10 dimethicone, PEG-12 dimethicone, PEG-32 methyl ether dimethicone, PEG / PPG-19 / 19 dimethicone, Polysilicone 13, lauryl PEG / PPG-18 / 18 methicone, lauryl PEG-10 tris(trimethylsiloxy)silylethyl dimethicone, cetyl diglyceryl tris(trimethylsiloxy)silylethyl dimethicone, PEG / PPG-20 / 22 butyl ether dimethicone, and cetyl PEG / PPG-10 / 1 dimethicone are preferred, and PEG-3 dimethicone, PEG-10 dimethicone, and PEG-12 dimethicone are more preferred. The numbers listed after "PEG" or "PPG" above represent the average number of moles of ethylene oxide or propylene oxide added.

[0015] There are no particular restrictions on the content of component (A-1) and it can be appropriately selected depending on the purpose, but from the viewpoint of redispersibility, dispersion persistence, and the feeling of dryness of the skin after application of the liquid deodorant composition, it is preferable that it be 0.1% by mass or more and 5% by mass or less, and more preferably 0.5% by mass or more and 2.5% by mass or less, relative to the total amount of the liquid deodorant composition. A content of component (A-1) of 0.1% by mass or more relative to the total amount of the liquid deodorant composition is preferable because it results in good redispersibility and sustained dispersion. It is preferable that the content of component (A-1) is 5% by mass or less of the total amount of the liquid deodorant composition, as this results in a good feeling of dryness on the skin after application of the liquid deodorant composition.

[0016] The aforementioned component (A-1) may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available products containing the (A-1) component include, by product name, DOWSIL ES-5600 Silicone Glycerol Emulsifier (cetyl diglyceryl tris(trimethylsiloxy)silylethyl dimethicone, HLB=2.5, manufactured by Toray Dow Ltd.), DOWSIL 5200 Formulation Aid (lauryl PEG / PPG-18 / 18 methicone, HLB=2, manufactured by Toray Dow Ltd.), DOWSIL BY22-008M (PEG / PPG-19 / 19 dimethicone, HLB=2, manufactured by Toray Dow Ltd.), KF-6038 (lauryl PEG-9 polydimethylsiloxyethyl dimethicone, HLB=3, manufactured by Shin-Etsu Chemical Co., Ltd.), DOWSIL ES-5300 FormulationAid (Lauryl PEG-10 Tris(trimethylsiloxy)silylethyl dimethicone, HLB=3, manufactured by Toray Dow Ltd.), DOWSIL BY11-030 (PEG / PPG-19 / 19 dimethicone, HLB=3, manufactured by Toray Dow Ltd.), DOWSIL FZ-2233 (Polysilicone-13, HLB=3, manufactured by Toray Dow Ltd.), KF-6048 (Cetyl PEG / PPG-10 / 1 dimethicone, HLB=3.5, manufactured by Shin-Etsu Chemical Co., Ltd.), DOWSIL ES-5612 FormulationAid (PEG-10 Dimethicone, HLB=4, manufactured by Toray Dow Ltd.), KF-6028 (PEG-9 Polydimethylsiloxyethyl Dimethicone, HLB=4, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-6015 (PEG-3 Dimethicone, HLB=4.5, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-6017 (PEG-10 Dimethicone, HLB=4.5, manufactured by Shin-Etsu Chemical Co., Ltd.), DOWSIL SH3775M (PEG-12 Dimethicone, HLB=5, manufactured by Dow Toray Ltd.), KF-6012 (PEG / PPG-20 / 22 Butyl Ether Dimethicone, HLB=7, manufactured by Shin-Etsu Chemical Co., Ltd.), DOWSIL Examples include ES-5373 Formulation Aid (PEG-12 dimethicone, HLB=8, manufactured by Dow-Toray Industries, Inc.) and KF-6004 (PEG-32 methyl ether dimethicone, HLB=9, manufactured by Shin-Etsu Chemical Co., Ltd.).

[0017] The HLB (Hydrophilic-Lipophilic Balance) in component (A-1) is an indicator of the balance between hydrophilicity and lipophilicity, and is generally calculated using the following formula. (Formula)...HLB=(ΣInorganic value / ΣOrganic)×10 Here, "ΣInorganic Value / ΣOrganic Value" is called the IOB value (Inorganic-Organic Balance), and it can be calculated by summing the "inorganic value" and "organic value" of the atoms and functional groups that make up organic compounds such as surfactants, based on the "inorganic value" and "organic value" set for each atom and functional group (see Yoshio Koda, "Organic Concept Diagram - Fundamentals and Applications," pp. 11-17, Sankyo Publishing, 1984).

[0018] <<(A-2) Cellulose-based thickener>> The aforementioned component (A-2) is included primarily to provide redispersibility and dispersion persistence.

[0019] There are no particular restrictions on the (A-2) component, and it can be appropriately selected depending on the purpose. However, from the viewpoint of improving redispersibility and dispersion persistence, for example, methylcellulose, ethylcellulose, carboxymethylcellulose or its salts (e.g., sodium salt, potassium salt, calcium salt, etc.), cellulose to which a hydroxymethyl group, a hydroxyethyl group, or a hydroxypropyl group has been added is preferred. These are obtained by reacting alkali cellulose, which is produced by reacting cellulose with caustic soda, with methyl chloride, monochloroacetic acid, ethylene oxide, propylene oxide, etc., and substituting the hydrogen atoms in the hydroxyl groups of cellulose with hydroxymethyl groups, hydroxyethyl groups, hydroxypropyl groups, methyl groups, carboxymethyl groups, etc. Furthermore, hydrophobic modified alkylcellulose can also be used as component (A-2).

[0020] The cellulose to which the hydroxymethyl group, hydroxyethyl group, or hydroxypropyl group is added is one in which some of the hydrogen atoms in the hydroxyl group of cellulose are substituted with a hydroxymethyl group, hydroxyethyl group, or hydroxypropyl group, and may have other substituents. Specific examples of cellulose to which the hydroxymethyl group, hydroxyethyl group, or hydroxypropyl group is added include hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, methylhydroxypropylcellulose, hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, stearoxyhydroxypropylmethylcellulose, and ethylhydroxyethylcellulose. Among these, hydroxypropylcellulose, hydroxypropylmethylcellulose, and stearoxyhydroxypropylmethylcellulose are preferred.

[0021] There are no particular restrictions on the content of component (A-2) and it can be appropriately set according to the content of component (B-2) described later. However, from the viewpoint of dispersion persistence and the feeling of dryness of the skin after application of the liquid deodorant composition, it is preferable that it be 0.1% by mass or more and 3% by mass or less, and more preferably 0.3% by mass or more and 1.2% by mass or less, based on the total amount of the liquid deodorant composition. A concentration of component (A-2) of 0.1% by mass or more relative to the total amount of the liquid deodorant composition is preferable because it results in good dispersion persistence. It is preferable that the content of component (A-2) is 3% by mass or less of the total amount of the liquid deodorant composition, as this results in a good feeling of dryness on the skin after application of the liquid deodorant composition.

[0022] The aforementioned component (A-2) may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available products containing the (A-2) component include, by product name, CELLOSIZE QP52000H (hydroxycellulose, manufactured by Dow Chemical), HEC Daicel SE400 (hydroxycellulose), HEC Daicel SE500 (hydroxycellulose), HEC Daicel SE600 (hydroxycellulose), HEC Daicel SE850 (hydroxycellulose), HEC Daicel SE900 (hydroxycellulose) (all manufactured by Daicel Finechem), METOLOSE 60SH (hydroxypropyl methylcellulose), METOLOSE Examples include 65SH (hydroxypropyl methylcellulose) (manufactured by Shin-Etsu Chemical Co., Ltd.), BENECEL® E50 (hydroxypropyl methylcellulose), BENECEL® E4M (hydroxypropyl methylcellulose), BENECEL® E10M (hydroxypropyl methylcellulose), BENECEL® F4MC (hydroxypropyl methylcellulose), BENECEL® K99C (hydroxypropyl methylcellulose), BENECEL® K4M (hydroxypropyl methylcellulose), BENECEL® K15M (hydroxypropyl methylcellulose), BENECEL® K35M (hydroxypropyl methylcellulose), BENECEL® K100M (hydroxypropyl methylcellulose), BENECEL® K200M (hydroxypropyl methylcellulose) (all manufactured by Ashland), and Keltrol (hydroxypropyl methylcellulose, manufactured by Kelco).

[0023] <<(A-3) Kinematic viscosity at 25℃ is 50 mm 2 Silicone with a value of / s or less >> The aforementioned component (A-3) is included primarily to provide a dry, smooth feeling to the skin after application of the liquid deodorant composition.

[0024] The (A-3) component is not particularly limited and can be appropriately selected according to the purpose. From the viewpoint of improving the smooth feeling of the skin after application of the liquid deodorant composition, octamethyltrisiloxane, decamethyltetrasiloxane, methylpolysiloxane, caprylyl methicone, cyclopentasiloxane, methylphenylpolysiloxane, phenyltrimethicone, cetyl dimethicone, and bis(hydroxyethoxypyril) dimethicone are preferred, and decamethyltetrasiloxane and methylpolysiloxane are more preferred.

[0025] The content of the (A-3) component is not particularly limited and can be appropriately selected according to the purpose. From the viewpoints of redispersibility and the smooth feeling of the skin after application of the liquid deodorant composition, it is preferably 3% by mass or more and 40% by mass or less, more preferably 10% by mass or more and 25% by mass or less, based on the total amount of the liquid deodorant composition. When the content of the (A-3) component is 3% by mass or more based on the total amount of the liquid deodorant composition, it is suitable because the smooth feeling of the skin after application of the liquid deodorant composition is good. When the content of the (A-3) component is 40% by mass or less based on the total amount of the liquid deodorant composition, it is suitable because the redispersibility is good.

[0026] As the (A-3) component, those synthesized appropriately may be used, or commercially available products may be used. Examples of commercially available products of the (A-3) component include, for example, under the trade name, KF-96A-1cs (octamethyltrisiloxane, kinematic viscosity: 1 mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96L-1.5cs (decamethyltetrasiloxane, kinematic viscosity: 1.5 mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd.), SeraSence SF 1.5 (decamethyltetrasiloxane, kinematic viscosity: 1.5 mm 2 / s, manufactured by Shima Trading Co., Ltd.), KF-96L-2cs (methylpolysiloxane, kinematic viscosity: 2 mm 2DOWSIL SH200C Fluid 1.5cSt (methylpolysiloxane, kinematic viscosity: 2mm²), manufactured by Shin-Etsu Chemical Co., Ltd. 2 / s, manufactured by Dow Toray Industries, Inc., DOWSIL FZ-3196 Fluid (caprylyl methicone, kinematic viscosity: 2.9 mm) 2 / s, manufactured by Dow Toray Industries, Inc., KF-995 (cyclopentasiloxane, kinematic viscosity: 4mm 2 DOWSIL SH245 Fluid (cyclopentasiloxane, manufactured by Shin-Etsu Chemical Co., Ltd.), kinematic viscosity: 4mm² 2 / s, manufactured by Dow Toray Industries, Inc., KF-96A-5cs (methylpolysiloxane, kinematic viscosity: 5mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96A-6cs (methylpolysiloxane, kinematic viscosity: 6mm 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96A-10cs (methylpolysiloxane, kinematic viscosity: 10 mm²) 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-56A (methylphenylpolysiloxane, kinematic viscosity: 15 mm²) 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96A-20cs (methylpolysiloxane, kinematic viscosity: 20 mm²) 2 DOWSIL SH556 Cosmetics Grade Fluid (Phenyl Trimethicone, manufactured by Shin-Etsu Chemical Co., Ltd.), kinematic viscosity: 22 mm² 2 / s, manufactured by Dow Toray Industries, Inc., KF-96A-30cs (methylpolysiloxane, kinematic viscosity: 30mm²) 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96A-40cs (methylpolysiloxane, kinematic viscosity: 40 mm²) 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-96A-50cs (methylpolysiloxane, kinematic viscosity: 50 mm²) 2 / s, manufactured by Shin-Etsu Chemical Co., Ltd.), DOWSIL 2502 Cosmetics Fluid (cetyl dimethicone, kinematic viscosity: 45 mm) 2 / s, manufactured by Dow Toray Industries, Inc., DOWSIL 5562 Carbinol Fluid (bis(hydroxyethoxylopyr)dimethicone, kinematic viscosity: 50mm) 2 Examples include / s (manufactured by Dow Toray Industries, Inc.).

[0027] <Aqueous phase> The aqueous phase contains (B-1) water and (B-2) hydroxyalkylated cyclodextrin, and may optionally contain (B-3) an antiperspirant component and other components. In this specification, "(B-1) water" may be referred to as "(B-1)" or "(B-1) component," "(B-2) hydroxyalkylated cyclodextrin" may be referred to as "(B-2)" or "(B-2) component," and "(B-3) antiperspirant component" may be referred to as "(B-3)" or "(B-3) component."

[0028] <<(B-1)Water>> The (B-1) water is a solvent included primarily to provide stability to the liquid deodorant composition.

[0029] The water content (B-1) is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of dispersion persistence and the feeling of dryness on the skin after application of the liquid deodorant composition, it is preferably 40% by mass or more and 75% by mass or less, and more preferably 45% by mass or more and 65% by mass or less, based on the total amount of the liquid deodorant composition. A water content of (B-1) of 40% by mass or more relative to the total amount of the liquid deodorant composition is preferable because it results in good dispersion persistence. It is preferable that the water content of (B-1) is 75% by mass or less of the total amount of the liquid deodorant composition, as this results in a good feeling of dryness on the skin after application of the liquid deodorant composition.

[0030] The water (B-1) may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available (B-1) water include products such as purified water (water, manufactured by Kosakai Pharmaceutical Co., Ltd.) under the trade name.

[0031] <<(B-2) Hydroxyalkylated Cyclodextrin>> The aforementioned component (B-2) is included primarily to provide a deodorizing effect.

[0032] There are no particular restrictions on the (B-2) component, and it can be appropriately selected depending on the purpose. However, from the viewpoint of improving the deodorizing effect, hydroxymethyl-α-cyclodextrin, hydroxymethyl-β-cyclodextrin, hydroxymethyl-γ-cyclodextrin, hydroxyethyl-α-cyclodextrin, hydroxyethyl-β-cyclodextrin, hydroxyethyl-γ-cyclodextrin, hydroxypropyl-α-cyclodextrin, hydroxypropyl-β-cyclodextrin, hydroxypropyl-γ-cyclodextrin, hydroxybutyl-α-cyclodextrin, hydroxybutyl-β-cyclodextrin, and hydroxybutyl-γ-cyclodextrin are preferred, and hydroxyethyl-β-cyclodextrin and hydroxypropyl-β-cyclodextrin are more preferred.

[0033] There are no particular restrictions on the content of component (B-2), and it can be appropriately selected according to the content of component (A-1). However, from the viewpoint of deodorizing effect and the feeling of dryness on the skin after application, it is preferable that the content is 0.1% by mass or more and 2.0% by mass or less, and more preferably 0.2% by mass or more and 1.0% by mass or less, based on the total amount of the liquid deodorant composition. A concentration of component (B-2) of 0.1% by mass or more relative to the total amount of the liquid deodorant composition is preferable because it provides a good deodorizing effect. When the content of component (B-2) is 2.0% by mass or less relative to the total amount of the liquid deodorant composition, a sufficient deodorizing effect is obtained, and the skin feels dry and comfortable after application of the liquid deodorant composition, which is preferable.

[0034] The aforementioned (B-2) component may be one that has been synthesized as appropriate, or a commercially available product may be used. Examples of commercially available products containing the (B-2) component include, for example, Celldex HP-β-CD (HP-β-cyclodextrin, manufactured by Nippon Shokuhin Kako Co., Ltd.) under the trade name.

[0035] <<(B-3) Antiperspirant ingredients>> As described above, the aqueous phase in the two-phase separated liquid deodorant composition of the present invention may contain (B-3) an antiperspirant component. The aforementioned component (B-3) is included primarily to provide an antiperspirant effect.

[0036] There are no particular restrictions on the (B-3) component, and it can be appropriately selected depending on the purpose. However, from the viewpoint of improving the antiperspirant effect, astringent elemental salts such as aluminum chlorohydroxy, zinc oxide, zinc paraphenolsulfonate, aluminum chloride, potassium aluminum sulfate, aluminum sulfate, aluminum acetate, and allantoin chlorohydroxyaluminum, or glycol complexes or amino acid complexes containing these elemental salts are preferred, with zinc paraphenolsulfonate and aluminum chlorohydroxyaluminum being more preferred. Furthermore, as component (B-3), aluminum zirconium octachlor hydrate, aluminum zirconium tetrachlor hydrate, aluminum zirconium trichlor hydrate, zirconium chlor hydrate, etc., can also be used.

[0037] There are no particular restrictions on the content of component (B-3) and it can be appropriately selected depending on the purpose, but from the viewpoint of antiperspirant effect and the feeling of dryness of the skin after application, it is preferable that it is 0.1% by mass or more and 15.0% by mass or less, and more preferably 0.1% by mass or more and 2.0% by mass or less, based on the total amount of the liquid deodorant composition. A content of component (B-3) of 0.1% by mass or more relative to the total amount of the liquid deodorant composition is preferable because it provides sufficient antiperspirant effect. It is preferable that the content of component (B-3) is 2.0% by mass or less relative to the total amount of the liquid deodorant composition, as this results in a good feeling of dryness on the skin after application of the liquid deodorant composition.

[0038] The aforementioned (B-3) component may be one that has been synthesized as appropriate, or a commercially available product may be used. Examples of commercially available products containing component (B-3) include, under the trade names: zinc sulfocarbohydrate (zinc paraphenolsulfonate, manufactured by Matsumoto Fine Chemical Co., Ltd.) and 50% aqueous solution of aluminum chlorohydrate (RKA-11) (aluminum chlorohydrate, manufactured by Taki Chemical Co., Ltd.).

[0039] [Mass ratio (A-2) / (B-2)] In this specification, the "mass ratio of the content of (A-2) to the content of (B-2) [(A-2) / (B-2)]" may be referred to as the "mass ratio [(A-2) / (B-2)]". There are no particular restrictions on the mass ratio [(A-2) / (B-2)], and it can be set appropriately depending on the purpose. However, from the viewpoint of the duration of the deodorizing effect and the refreshing feeling on the skin when the liquid deodorant composition is applied, it is preferably 0.30 to 8.0, and more preferably 0.5 to 5.0. A mass ratio [(A-2) / (B-2)] of 0.30 or more and 8.0 or less is preferable because it provides good persistence of the deodorizing effect and a refreshing feeling on the skin when the liquid deodorant composition is applied. Furthermore, "a refreshing feeling on the skin when applying the liquid deodorant composition" refers to a feeling of freshness and moisture when spreading the liquid deodorant composition on the skin, without feeling any oily film.

[0040] <Other ingredients> In addition to the components (A-1) to (B-3) described above, other components commonly used in liquid deodorant compositions may be added to the two-phase separation type liquid deodorant composition of the present invention, provided that they do not impair the effects of the present invention. The aforementioned other components are not particularly limited and can be appropriately selected according to the purpose. Examples include oil and fat compounds, wax compounds, silicone compounds other than those listed in (A-3), hydrocarbon oils, higher fatty acids, higher alcohols, lower alcohols, surfactants other than those listed in (A-1), polymers, antioxidants, pigments, emulsifying stabilizers, modifiers, preservatives, UV absorbers, chelating agents, humectants, thickeners other than those listed in (A-2), cooling agents other than those listed in (B-3), anti-inflammatory agents, bactericides, amino acids, vitamins, fragrances, and various plant and animal extracts. Furthermore, there are no particular restrictions on the content of the other components mentioned above, and they can be appropriately selected according to the purpose, as long as they do not hinder the effects of the present invention.

[0041] —Hydrogen oils— The hydrocarbon oil is not particularly limited and can be appropriately selected depending on the purpose. Examples include squalane, vegetable squalane, polyolefin, and hydrogenated polyisobutene. The hydrocarbon oil may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available hydrocarbon oils include Phytosqualane (manufactured by Iwase Cosfa Co., Ltd.), Olive Squalane (manufactured by Higher Alcohol Industry Co., Ltd.), Sugar Squalane (manufactured by Nippon Surfactant Industry Co., Ltd.), NIKKOL Synceran 4 SP (manufactured by Nippon Surfactant Industry Co., Ltd.), and Pearlream 3 (manufactured by NOF Corporation). There are no particular restrictions on the content of the hydrocarbon oil, and it can be appropriately selected depending on the purpose, but from the viewpoint of improving usability, it is preferable that it be 0.1% by mass or more and 20% by mass or less of the total amount of the liquid deodorant composition.

[0042] —Lower alcohol— There are no particular restrictions on the aforementioned lower alcohols, and they can be appropriately selected depending on the purpose. Examples include ethanol and isopropyl alcohol. The lower alcohol may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available lower alcohols include Traceable 95 Grade 1 (fermented ethanol, manufactured by Nippon Alcohol Industry Co., Ltd.) under the trade name. There are no particular restrictions on the content of the lower alcohol, and it can be appropriately selected depending on the purpose. However, from the viewpoint of improving the stability of the formulation, it is preferable that it be 10% by mass or more and 40% by mass or less of the total amount of the liquid deodorant composition.

[0043] —Preservatives— There are no particular restrictions on the preservatives mentioned above, and they can be appropriately selected depending on the purpose. Examples include benzoates, sorbates, dehydroacetates, parahydroxybenzoates, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, 3,4,4'-trichlorocarbanilide, benzalkonium chloride, hinokitiol, resorcinol, methylchloroisothiazolinone / methylisothiazolinone solution (product name: Kayson CG, manufactured by Rohm & Haas Japan), salicylic acid, pentanediol, and phenoxyethanol. The preservative may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available preservatives include Trizone Disinfectant Solution 10% "YI" (benzalkonium chloride, manufactured by Kosakai Pharmaceutical Co., Ltd.).

[0044] —(B-3) Cooling agents other than ingredient— Other than the component (B-3) mentioned above, there are no particular restrictions on the cooling agent, and it can be appropriately selected depending on the purpose. For example, menthol can be used. Other cooling agents besides component (B-3) may be synthesized as appropriate or commercially available products may be used. Examples of commercially available cooling agents include product name 598887 RKX-48 (l-menthol, manufactured by Takasago International Corporation). There are no particular restrictions on the content of cooling agents other than component (B-3), and they can be appropriately selected according to the purpose. However, from the viewpoint of improving the cooling sensation, it is preferable that the content be 0.1% by mass or more and 0.5% by mass or less of the total amount of the liquid deodorant composition.

[0045] —Anti-inflammatory drugs— There are no particular restrictions on the anti-inflammatory agent, and it can be appropriately selected depending on the purpose. For example, dipotassium glycyrrhizinate is one such example. The anti-inflammatory agent may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available anti-inflammatory agents include dipotassium glycyrrhizinate (manufactured by Maruzen Pharmaceutical Co., Ltd.), which is sold under the trade name.

[0046] - Disinfectant - The aforementioned disinfectant is not particularly limited and can be appropriately selected depending on the purpose; for example, isopropylmethylphenol is one such example. There are no particular restrictions on the amount of the disinfectant, and it can be appropriately selected depending on the purpose, but it is preferable that it be 0.01% by mass or more and 1.0% by mass or less of the total amount of the liquid deodorant composition.

[0047] —Various plant and animal extracts— There are no particular restrictions on the various plant and animal extracts mentioned above, and they can be appropriately selected according to the purpose. For example, rice fermentation liquid can be used. This rice fermentation liquid can be obtained by enzymatic decomposition or saccharification with koji, or by fermentation with sake starter or yeast using rice or rice bran. The rice fermentation liquid may be synthesized as appropriate, or a commercially available product may be used. Examples of commercially available rice fermentation liquids include Kome Extract Koken BG (rice fermentation liquid, manufactured by Koken Co., Ltd.) under the trade name. There are no particular restrictions on the content of the various plant and animal extracts, and they can be appropriately selected according to the purpose. However, from the viewpoint of improving usability, it is preferable that the content be 0.01% by mass or more and 5.0% by mass or less of the total amount of the liquid deodorant composition.

[0048] -pH- The pH of the liquid deodorant composition at 25°C is preferably 3 to 4.5, from the viewpoint of antiperspirant effect, lack of skin irritation, and stability of the liquid deodorant composition. A pH of 3 or higher is preferable because it provides good antiperspirant effect and minimizes skin irritation. A pH of 4.5 or lower is preferable because it results in good stability for the liquid deodorant composition.

[0049] -viscosity- The viscosity of the liquid deodorant composition at 25°C is not particularly limited and can be appropriately selected depending on the purpose, but a viscosity of 1.0 mPa·s or more and 3,000 mPa·s or less is preferred. The viscosity can be measured, for example, by setting it in a BM-type viscometer (equipped with rotor No. 1 or rotor No. 2), rotating the rotor at a rotational speed of 60 rpm, and measuring it 1 minute after the rotor starts rotating.

[0050] -Manufacturing method- There are no particular limitations on the method for producing the two-phase separated liquid deodorant composition of the present invention, and it can be appropriately selected depending on the purpose. For example, it can be produced by uniformly mixing an oil phase in which components (A-1), (A-2), and (A-3) are uniformly dispersed and mixed with an aqueous phase in which components (B-1), (B-2), (B-3) as needed, and the other components are mixed.

[0051] There are no particular limitations on the apparatus for preparing the liquid deodorant composition, and an appropriate apparatus can be selected depending on the purpose. For example, an agitator equipped with multiple stirring blades (propellers, turbines, dispersers, etc.) capable of shearing and overall mixing can be used. The components (A-1) to (B-3) and the other components may be used individually when preparing the liquid deodorant composition, or they may be used in the form of a mixture containing two or more components.

[0052] The dosage form of the liquid deodorant composition is preferably selected from either a roll-on type or a lotion type. When the liquid deodorant composition is of the roll-on type, it is preferable that the liquid deodorant composition product comprises the liquid deodorant composition and an application ball, and consists of a roll-on container filled with the liquid deodorant composition. The roll-on type formulation is housed in a known roll-on container, and the liquid deodorant composition is applied to the application ball, which is held rotatably by a holder with a portion of it exposed in the roll-on container, and the application ball can be applied to the skin at the time of use.

[0053] -container- There are no particular restrictions on the container, and it can be appropriately selected depending on the purpose. Examples include roll-on containers and lotion bottles. Among these, roll-on containers are preferred from the viewpoint of antiperspirant effect. The roll-on container is suitable for use in that it can apply the liquid deodorant composition to the skin with high adhesion and exhibit an antiperspirant effect. The roll-on container is not particularly limited as long as it can be filled with the liquid deodorant composition, and can be appropriately selected according to the purpose, for example, the one described in Japanese Patent Application Publication No. 2005-186997.

[0054] Examples of roll-on containers that can be used include bottles (material: HDPE natural, full capacity: approximately 56 mL, body diameter: approximately 33 mm, height: approximately 87 mm, manufactured by Yoshino Kogyosho Co., Ltd.), rings (material: LLDPE natural, outer diameter: approximately 26 mm, height: approximately 18 mm, manufactured by Yoshino Kogyosho Co., Ltd.), and balls (material: PP white, diameter: approximately 20 mm, manufactured by Yoshino Kogyosho Co., Ltd.).

[0055] Examples of the lotion bottle containers that can be used include: bottle (product name: TOMIII-50, material: HDPE natural, full capacity: approximately 34mL, body diameter: approximately 42mm x 29mm (oval), height: approximately 88mm, manufactured by Takemoto Container Co., Ltd.), inner stopper (product name: TO cap nozzle A, material: PE natural, outer diameter: approximately 12mm, height: approximately 13mm, manufactured by Takemoto Container Co., Ltd.), and cap (product name: TOMIII cap, material: PP white, outer diameter: approximately 37mm x 25mm (oval), height: approximately 24mm, manufactured by Takemoto Container Co., Ltd.).

[0056] -Applications- The two-phase separation type liquid deodorant composition of the present invention is excellent in dispersion persistence and redispersibility, and is excellent in the refreshing feeling on the skin when the liquid deodorant composition is applied, the smooth feeling on the skin after application, and the deodorizing effect and its persistence. For this reason, it can be applied to cosmetics, pharmaceuticals, quasi-drugs, etc., and is suitably used as an antiperspirant, deodorant, antiperspirant and deodorant agent. [Examples]

[0057] The present invention will be specifically described below with reference to examples, comparative examples, and formulation examples, but the present invention is not limited in any way to these examples. The content of each component listed in the examples, comparative examples, and formulation examples shown in Tables 1 to 15 is shown in mass percent and is all a pure content value.

[0058] (Examples 1-56 and Comparative Examples 1-8) Liquid deodorant compositions for Examples 1 to 56 and Comparative Examples 1 to 8, consisting of the compositions shown in Tables 1 to 12 below, were prepared by the following method. The product was manufactured by uniformly mixing an oil phase in which components (A-1), (A-2), and (A-3) were uniformly dispersed and mixed with an aqueous phase in which components (B-1), (B-2), (B-3), and other components were mixed using a stirrer or a three-in-one motor under conditions of 15 to 25°C.

[0059] Next, each of the obtained liquid deodorant compositions was evaluated and judged based on the following items. The results are shown in Tables 1 to 12.

[0060] <Evaluation and determination of redistribution> 50g of each liquid deodorant composition was placed in a glass vial and allowed to stand to separate. After confirming complete separation, the glass vial was inverted once to mix, and the appearance was observed. "Redispersibility" was evaluated based on the following criteria. -Criteria for determining redistribution- ◎: The entire composition is completely cloudy. ○: A small amount of translucent liquid can be observed at the bottom of the glass vial, but most of the composition is cloudy. △: More than half of the composition has separated. ×: The entire composition is separated.

[0061] <Evaluation and assessment of distributed persistence> 50g of each liquid deodorant composition was placed in a glass vial and allowed to stand. The vial was then inverted and mixed until completely dispersed. After confirming complete dispersion, the vial was left to stand for 1 hour and the appearance was observed. "Dispersion persistence" was evaluated based on the following criteria. -Criteria for determining distributed persistence- ◎: The entire composition is completely cloudy. ○: A small amount of translucent liquid can be observed at the bottom of the glass vial, but most of the composition is cloudy. △: More than half of the composition has separated. ×: The entire composition is separated.

[0062] <Evaluation and assessment of antiperspirant effect> 0.40 g of each liquid deodorant composition was applied to the armpits of nine expert panelists and allowed to dry. Then, sweat-absorbing pads were attached to both armpits, and the participants performed 20 minutes of exercise on an exercise bike under high-temperature conditions (38°C, 40% RH). The amount of sweat produced in the areas where the samples were applied and those where they were not was measured from the change in mass of the sweat-absorbing pads, and the antiperspirant rate was calculated using the following formula. Antiperspirant rate (%) = 100 - amount of sweat in the sample-applied area / amount of sweat in the unapplied area × 100 The average sweat-control rate of nine expert panelists was calculated, and the "sweat-controlling effect" was determined based on the following criteria. - Criteria for evaluating antiperspirant effectiveness - ◎: Antiperspirant rate of 65% or higher ○: Antiperspirant rate is between 45% and 65% △: Antiperspirant rate is between 10% and 45% ×: Antiperspirant rate is less than 10%

[0063] <Evaluation and determination of skin dryness when liquid deodorant composition is applied> 0.40g of each liquid deodorant composition was applied to the forearms of nine expert panelists and allowed to dry. The "skin dryness" of the liquid deodorant composition upon application was evaluated based on the following evaluation criteria, and the final result was determined based on the average rating of the nine expert panelists. -Evaluation criteria for skin dryness when applying liquid deodorant composition- 5 points: I feel it very strongly. 4 points: I feel it strongly. 3 points: Feel 2 points: I feel it somewhat. 1 point: I don't feel it. - Criteria for determining the dryness of the skin when applying a liquid deodorant composition - ◎: Average score is 4.5 points or higher ○: Average score is between 3.0 and 4.5 points. △: Average score is between 2.0 and 3.0 points. ×: The average score is less than 2.0 points.

[0064] <Evaluation and assessment of deodorizing effect> 0.40g of each liquid deodorant composition was applied to the armpits of nine expert panelists and allowed to dry. The "deodorizing effect" was determined based on the number of people who reported "not noticing any sweat odor" after 4 hours. —Criteria for determining deodorizing effect— ◎: The number of people who answered "I don't smell any sweat odor" was 8 or more. ○: The number of people who answered "I don't smell any sweat odor" was between 6 and 7. △: The number of people who answered "I don't smell any sweat odor" was between 3 and 5. ×: The number of people who answered "I don't smell any sweat odor" was 2 or less.

[0065] <Evaluation and assessment of the duration of odor-preventing effect> 0.40g of each liquid deodorant composition was applied to the armpits of nine expert panelists and allowed to dry. The "duration of deodorizing effect" was determined based on the number of people who reported "not noticing any sweat odor" after 8 hours. —Criteria for determining the duration of odor-preventing effect— ◎: The number of people who answered "I don't smell any sweat odor" was 7 or more. ○: The number of people who answered "I don't smell any sweat odor" was between 5 and 6. △: The number of people who answered "I don't smell any sweat odor" was between 3 and 4. ×: The number of people who answered "I don't smell any sweat odor" was 2 or less.

[0066] <Evaluation and determination of the feeling of freshness on the skin when liquid deodorant composition is applied> 0.40g of each liquid deodorant composition was applied to the forearms of nine expert panel members. The "feeling of freshness on the skin after application of the liquid deodorant composition" was determined based on the number of participants who reported feeling a "refreshing sensation" upon application. Furthermore, "a refreshing application feel" refers to a fresh, dewy sensation where the liquid deodorant composition does not leave an oily film when spread on the skin. —Criteria for determining the feeling of freshness on the skin when applying a liquid deodorant composition— ◎: 8 or more people answered that it has a refreshing feel when applied. ○: The number of people who answered "It has a refreshing feel when applied" was between 6 and 7. △: The number of people who answered "It has a refreshing feel when applied" was between 3 and 5. ×: The number of people who answered "It has a refreshing feel when applied" was 2 or less.

[0067] [Table 1]

[0068] Table 2

[0069] Table 3

[0070] Table 4

[0071] Table 5

[0072] Table 6

[0073] Table 7

[0074] Table 8

[0075] Table 9

[0076] Table 10

[0077] Table 11

[0078] Table 12

[0079] (Prescription examples 1-17) Liquid deodorant compositions with the compositions and contents shown in Tables 13-15 below were prepared in the same manner as in Example 1.

[0080] [Table 13]

[0081] [Table 14]

[0082] [Table 15]

[0083] Details of each component used in Examples 1-56, Comparative Examples 1-8, and Formulation Examples 1-17 are shown in Table 16 below.

[0084] [Table 16] [Industrial applicability]

[0085] The two-phase separation type liquid deodorant composition of the present invention is excellent in dispersion persistence and redispersibility, and is excellent in the refreshing feeling on the skin when the liquid deodorant composition is applied, the smooth feeling on the skin after application, and the deodorizing effect and its persistence. For this reason, it can be applied to cosmetics, pharmaceuticals, quasi-drugs, etc., and is suitably used as an antiperspirant, deodorant, antiperspirant and deodorant agent.

Claims

1. A two-phase separation type liquid deodorant composition comprising an oil phase and an aqueous phase, The oil phase is (A-1) A silicone-based surfactant with an HLB of 10 or less, (A-2) Cellulose-based thickener, (A-3) Kinematic viscosity at 25°C is 50 mm ２ It contains a silicone that is less than or equal to / s, The aqueous phase, (B-1) Water and, A two-phase separation type liquid deodorant composition characterized by containing (B-2) hydroxyalkylated cyclodextrin.

2. The two-phase separation type liquid deodorant composition according to claim 1, wherein the mass ratio of the content of (A-2) to the content of (B-2) [(A-2) / (B-2)] is 0.50 or more and 5.0 or less.

3. The content of (A-1) is 0.5% by mass or more and 2.5% by mass or less, relative to the total amount of the two-phase separation type liquid deodorant composition. The content of (A-2) is 0.3% by mass or more and 1.2% by mass or less, relative to the total amount of the two-phase separation type liquid deodorant composition. The content of (A-3) is 10% by mass or more and 25% by mass or less, relative to the total amount of the two-phase separation type liquid deodorant composition. The two-phase separation type liquid deodorant composition according to any one of claims 1 to 2, wherein the content of (B-2) is 0.2% by mass or more and 1.0% by mass or less based on the total amount of the two-phase separation type liquid deodorant composition.

4. The two-phase separated liquid deodorant composition according to any one of claims 1 to 2, wherein the oil phase contains (B-3) an antiperspirant component.

5. A two-phase separation type liquid deodorant composition according to any one of claims 1 to 2, which suppresses body odor.

6. A two-phase separation type liquid deodorant composition according to any one of claims 1 to 2, which is selected from either a roll-on type or a lotion type.

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