JP7270480B2 - Solid antiperspirant composition - Google Patents

Description

The present invention relates to solid antiperspirant compositions.

Conventionally, a stick-type solid antiperspirant composition formed by mixing a compound having an antiperspirant effect such as an aluminum compound and an oil component that is solid at room temperature has been widely used. The stick-type solid antiperspirant composition not only has an antiperspirant effect and a deodorant effect, but also has a good feeling of use, such as being easy to apply to the skin, less sticky feeling when applied to the skin, and breaking.・It is also required to be a stable agent that does not chip or oil floats on the surface.

So far, by blending a film-forming agent, octylamide acrylate, with a copolymer containing at least one monomer unit selected from acrylic acid ester, hydroxypropyl acrylate, and butylaminoethyl methacrylate, A stick-type solid antiperspirant composition with improved durability of the antiperspirant effect has been proposed (see Patent Document 1).
However, there is a problem that the hardness of the composition increases when the polymer is blended.

Further, by blending a water-soluble aluminum compound, a (dimethicone/phenylvinyldimethicone) crosspolymer, and an anionic polymer and/or an amphoteric polymer containing a vinyl group or an acrylic group, it is possible to improve the feeling of use, the antiperspirant effect, and its persistence. A stick-type antiperspirant composition with improved properties and storage stability has also been proposed (see Patent Document 2).
However, the proposed antiperspirant composition is not sufficiently satisfactory in its antiperspirant effect and its durability and stability, and also has the problem of leaving a white residue.

Therefore, it has excellent antiperspirant effect and its persistence, does not leave stickiness after application or white residue after application drying, is easy to apply even in low temperature environments, does not break easily even after repeated use, and is stable. A solid antiperspirant composition with excellent antiperspirant properties has not yet been provided, and the current situation is that rapid development thereof is strongly desired.

JP 2018-52907 A JP 2014-15421 A

An object of the present invention is to solve the above-mentioned conventional problems and to achieve the following objects. That is, the present invention is excellent in antiperspirant effect and durability, does not cause stickiness after application or white residue after application and drying, is easy to apply even in a low temperature environment, does not break easily even after repeated use, and An object of the present invention is to provide a solid antiperspirant composition having excellent agent stability.

The inventors of the present invention conducted intensive studies to achieve the above object, and found that (A) (dimethicone/phenylvinyl dimethicone) crosspolymer, alkyl acrylate copolymer methylpolysiloxane ester, and 1,1'-methylene - At least one selected from bis(4-isocyanatocyclohexane)-polypropylene glycol copolymer, (B) polyoxypropylene alkyl ether, (C) solid oil solid at 25 ° C., and (D) control Contains sweat ingredients and
The content of the component (C) is 17% by mass to 23% by mass, and is represented by [((A) + (B)) / (C)], with respect to the content of the component (C), When the mass ratio of the total content of the component (A) and the component (B) is 0.96 or more, the increase in hardness is suppressed, and the penetration at 20 ° C. is 5 mm to 15 mm. It has excellent antiperspirant effect and durability, does not leave stickiness after application or white residue after application and drying, is easy to apply even in low temperature environments, does not break easily even after repeated use, and is an agent. It was found that the stability of

The present invention is based on the above findings by the present inventors, and means for solving the above problems are as follows. Namely
<1> (A) From (dimethicone/phenyl vinyl dimethicone) crosspolymer, alkyl acrylate copolymer methylpolysiloxane ester, and 1,1′-methylene-bis(4-isocyanatocyclohexane)/polypropylene glycol copolymer at least one selected;
(B) a polyoxypropylene alkyl ether;
(C) a solid oil that is solid at 25°C;
(D) containing an antiperspirant component,
The content of the component (C) is 17% by mass to 23% by mass,
Mass ratio of the total content of the component (A) and the component (B) to the content of the component (C), represented by [((A) + (B)) / (C)] is 0.96 or more,
The solid antiperspirant composition has a penetration of 5 mm to 15 mm at 20°C.
<2> The content of the component (A) is 0.3% by mass to 1.5% by mass,
The content of the component (B) is 18% by mass to 22% by mass,
The content of the component (C) is 19% by mass to 21% by mass,
The solid antiperspirant composition according to <1>, wherein the content of component (D) is 5% by mass to 24% by mass.

According to the present invention, the above-mentioned problems in the conventional art can be solved and the above-mentioned objects can be achieved. It is also possible to provide a solid antiperspirant composition that is easy to apply even in the case of repeated use, does not easily break even after repeated use, and has excellent stability.

(Solid antiperspirant composition)
The solid antiperspirant composition of the present invention comprises (A) component dimethicone/phenyl vinyl dimethicone) crosspolymer, alkyl acrylate copolymer methylpolysiloxane ester, and 1,1′-methylene-bis(4-isocyanato). cyclohexane)/polypropylene glycol copolymer, component (B) polyoxypropylene alkyl ether, component (C) a solid oil that is solid at 25°C, and component (D) antiperspirant. and, if necessary, further contain other components.

<(A) selected from (dimethicone/phenyl vinyl dimethicone) crosspolymer, alkyl acrylate copolymer methylpolysiloxane ester, and 1,1′-methylene-bis(4-isocyanatocyclohexane)/polypropylene glycol copolymer at least one >
From (dimethicone/phenyl vinyl dimethicone) crosspolymer, alkyl acrylate copolymer methylpolysiloxane ester, and 1,1'-methylene-bis(4-isocyanatocyclohexane)/polypropylene glycol copolymer of component (A) At least one selected can be contained in order to improve the durability of the antiperspirant effect and the non-stickiness after application.
Among these, the component (A) preferably contains a (dimethicone/phenylvinyldimethicone) crosspolymer and an alkyl acrylate copolymer methylpolysiloxane ester, from the viewpoint of sustained antiperspirant effect.

The component (A) may be appropriately synthesized or may be a commercially available product.
Examples of commercially available products of component (A) include (dimethicone/phenylvinyldimethicone) crosspolymer such as KSG-18A (manufactured by Shin-Etsu Chemical Co., Ltd.); KP-541, KP-543, KP-545, KP- 549, KP-550 (manufactured by Shin-Etsu Chemical Co., Ltd.) and other alkyl acrylate copolymer methyl polysiloxane esters; (4-isocyanatocyclohexane)·polypropylene glycol copolymer and the like. These may be used individually by 1 type, and may use 2 or more types together.

The content of component (A) is not particularly limited and can be appropriately selected according to the purpose. ~5% by mass is preferable, 0.3% to 1.5% by mass is more preferable, and 0.3% to 0.9% by mass is particularly preferable. When the content of component (A) is 0.1% by mass or more, the durability of the antiperspirant effect is good, and when it is 5% by mass or less, the non-stickiness after application is good.

<(B) Polyoxypropylene alkyl ether>
The polyoxypropylene alkyl ether of component (B) can be contained in order to improve the stability of the agent and the absence of white residue on the skin after application and drying.

The number of carbon atoms in the alkyl group in component (B) is not particularly limited and can be appropriately selected depending on the intended purpose, but is preferably 4 to 18.

The average number of added moles of propylene oxide (PO) in the component (B) is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 10-40.

Specific examples of the component (B) include polyoxypropylene butyl ether and polyoxypropylene stearyl ether. These may be used individually by 1 type, and may use 2 or more types together. Among these, it is preferable to contain polyoxypropylene butyl ether.

The component (B) may be appropriately synthesized or may be a commercially available product.
Commercially available products of the component (B) include, for example, Unilube (registered trademark) MB-7 (compound name: polyoxypropylene butyl ether, number of moles of propylene oxide added: 12), Unilube (registered trademark) MB-11 (compound name : polyoxypropylene butyl ether, number of moles of propylene oxide added: 17), Unilube (registered trademark) MB-14 (compound name: polyoxypropylene butyl ether, number of moles of propylene oxide added: 20), Unilube (registered trademark) MB-19 ( Compound name: polyoxypropylene butyl ether, number of moles of propylene oxide added: 24), Unilube (registered trademark) MB-38 (compound name: polyoxypropylene butyl ether, number of moles of propylene oxide added: 33), Unilube (registered trademark) MS- 70K (compound name: polyoxypropylene stearyl ether, number of moles of propylene oxide added: 15) (manufactured by NOF Corporation) and the like.

The content of the component (B) is not particularly limited and can be appropriately selected according to the purpose. % by mass is preferred, and 18% to 22% by mass is more preferred. Content of the said (B) component. When it is 16% by mass or more, the stability of the agent and the absence of white residue after coating and drying are good, and when it is 25% by mass or less, the stability of the agent is good.

<(C) Solid oil solid at 25°C>
The solid oil that is solid at 25° C., component (C), can be contained in order to improve the antiperspirant effect.

The component (C) is not particularly limited as long as it is solid at 25° C., and can be appropriately selected from known solid oils such as stearyl alcohol, hydrogenated castor oil, paraffin, behenyl alcohol, and cetyl alcohol. , cetostearyl alcohol, microcrystalline wax, polyethylene wax, candelilla wax, carnauba wax, stearic acid, petroleum jelly, shea butter, stearyl stearate, myristyl myristate, (ethylhexanoic acid/stearic acid/adipic acid) glyceryl, hexahydroxystearin Dipentaerythrityl acid, hydrogenated palm oil, beeswax, lanolin, shellac, myristyl alcohol, cetanol, lauric acid, myristic acid, palmitic acid, stearic acid, modified silicone wax and the like. These may be used individually by 1 type, and may use 2 or more types together. Among these, the component (C) preferably contains stearyl alcohol, hydrogenated castor oil, and paraffin from the viewpoint of antiperspirant effect.

The component (C) may be appropriately synthesized or may be a commercially available product.
Commercially available products of the component (C) include, for example, NAA (registered trademark)-45, NAA (registered trademark)-46 (manufactured by NOF Corporation) and the like stearyl alcohol; ), hardened castor oil such as castor hardened oil A (manufactured by Ito Seiyu Co., Ltd.); and paraffin such as refined paraffin wax (manufactured by Nikko Rica Co., Ltd.).

The content of component (C) is 17% by mass to 23% by mass, preferably 19% by mass to 21% by mass, from the viewpoint of antiperspirant effect. If the content of component (C) is less than 17% by mass, the antiperspirant effect will be insufficient, and if it exceeds 23% by mass, the antiperspirant effect will be insufficient.

<Mass ratio [((A) + (B))/(C)]>
The (A) component and the (B) component with respect to the content of the (C) component represented by [((A) + (B)) / (C)] of the solid antiperspirant composition The mass ratio to the total content of is 0.96 or more, preferably 0.96 to 1.5, and 0.96 to 1.2 is more preferred. If the mass ratio [((A)+(B))/(C)] is less than 0.96, a white residue is left on the skin after application and drying. Further, when the mass ratio [((A)+(B))/(C)] is 1.5 or less, the agent is less likely to break.

<(D) Antiperspirant component>
The antiperspirant component (D) can be contained in order to improve the antiperspirant effect.

The component (D) is not particularly limited and can be appropriately selected from known compounds, and examples thereof include aluminum compounds, zirconium compounds and complexes thereof. These may be used individually by 1 type, and may use 2 or more types together.

Examples of the aluminum compound include aluminum chloride, aluminum sulfate, aluminum potassium sulfate, aluminum acetate, chlorohydroxyaluminum, and allantoin chlorohydroxyaluminum.

Examples of the zirconium compound include zirconium chloride, zirconium hydroxychloride, zirconium hydroxide, ammonium zirconium carbonate, potassium zirconium carbonate, and zirconium sulfate.

Examples of the complex include aluminum chloride/glycine complex, aluminum sulfate/glycine complex, potassium aluminum sulfate/glycine complex, aluminum acetate/glycine complex, chlorohydroxyaluminum/glycine complex, bromohydroxyaluminum/glycine complex, allantoin chlorohydroxyaluminum A complex of an aluminum compound such as a glycine complex and glycine; an aluminum chloride/propylene glycol complex, an aluminum sulfate/propylene glycol complex, an aluminum potassium sulfate/propylene glycol complex, an aluminum acetate/propylene glycol complex, a chlorohydroxy aluminum/propylene glycol complex, Complexes of aluminum compounds with propylene glycol, such as bromohydroxyaluminum/propylene glycol complexes and allantoinchlorohydroxyaluminum/propylene glycol complexes; aluminum chloride/zirconium/glycine complexes, aluminum sulfate/zirconium/glycine complexes, aluminum potassium sulfate/zirconium/glycine complexes mixtures of aluminum compounds and zirconium compounds such as complexes, aluminum acetate/zirconium-glycine complex, aluminum chlorohydroxyl/zirconium-glycine complex, aluminum bromohydroxyl/zirconium-glycine complex, allantoin-chlorohydroxyaluminum/zirconium-glycine complex and glycine complexes, and the like.

Among these, the component (D) is preferably chlorohydroxyaluminum, chlorohydroxyaluminum/propylene glycol complex, or chlorohydroxyaluminum/zirconium/glycine complex from the viewpoint of antiperspirant effect.

The (D) component may be appropriately synthesized or may be a commercially available product.
Examples of commercially available products of component (D) include chlorohydroxyaluminum such as SUMMIT MICRO DRY 3115 (manufactured by Summit) and DRYGEN P (manufactured by Clariant Japan).

The content of component (D) is not particularly limited and can be appropriately selected according to the purpose, but from the viewpoint of antiperspirant effect and resistance to breakage of the agent, it is preferably 2% by mass to 30% by mass. , 5% by mass to 24% by mass. When the content of component (D) is 2% by mass or more, the antiperspirant effect is good, and when it is 30% by mass or less, the resistance to breakage of the agent is good.

<(E) Liquid oil that is liquid at 25°C>
The solid antiperspirant composition may contain a liquid oil that is liquid at 25°C as component (E). The component (E) is not particularly limited as long as it is liquid at 25° C., and can be appropriately selected depending on the intended purpose. Examples thereof include silicone.

The kinematic viscosity of the silicone at 25° C. is not particularly limited and can be appropriately selected depending on the purpose, but is preferably 0.65 mm ² /s to 20 mm ² /s. Silicones with a kinematic viscosity of less than 0.65 mm ² /s are not commercially available.

The silicone may be either cyclic or linear, and may have a branched chain. Examples of the silicone include decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, methylcyclopolysiloxane, methylpolysiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, methyltrimethicone, and methylphenylpolysiloxane. . These may be used individually by 1 type, and may use 2 or more types together. Among these, decamethylcyclopentasiloxane and methylphenylpolysiloxane are preferred.

The (E) component may be appropriately synthesized or may be a commercially available product.
Examples of the commercially available products include decamethylcyclopentasiloxane such as SH245 (manufactured by Dow Corning Toray Co., Ltd.) and TSF-405 (manufactured by Momentive Performance Materials Japan LLC); KF-96L-2cs (Shin-Etsu Kagaku Kogyo Co., Ltd.); decamethyltetrasiloxane such as KF-96L-1.5cs (manufactured by Shin-Etsu Chemical Co., Ltd.); disiloxane such as DM0.65 (manufactured by Asahi Kasei Wacker Silicone Co., Ltd.); cyclohexasiloxane such as DC246 (manufactured by Dow Corning Toray Co., Ltd.); and methylphenylpolysiloxane such as KF-56A (manufactured by Shin-Etsu Chemical Co., Ltd.).

<Mass ratio [(E)/(C)]>
The mass ratio of the content of the component (E) to the content of the component (C) represented by [(E)/(C)] of the solid antiperspirant composition is not particularly limited. , can be appropriately selected depending on the purpose, but from the viewpoint of ease of application in a low temperature environment and stability of the agent, 1 to 4 are preferable. When the mass ratio [(E)/(C)] is 1 or more, the ease of application in a low-temperature environment is good, and when it is 4 or less, the stability of the agent is good.

<Other ingredients>
The other components in the solid antiperspirant composition are not particularly limited and can be appropriately selected depending on the intended purpose. oils, inorganic particles such as zinc oxide, waxes, hydrocarbon oils, higher fatty acids, higher alcohols, ester oils, surfactants, antioxidants, pigments, emulsion stabilizers, pH adjusters, astringents, preservatives , UV absorbers, moisturizers, thickeners, cooling agents, anti-inflammatory agents, amino acids, vitamins, and various plant extracts. These may be used individually by 1 type, and may use 2 or more types together.

The content of the other components is not particularly limited as long as it does not impair the effects of the present invention, and can be appropriately selected according to the purpose.

<Penetration at 20°C>
The penetration of the solid antiperspirant composition at 20° C. is 5 mm to 15 mm, preferably 7 mm to 12 mm, from the viewpoints of ease of application in a low temperature environment, antiperspirant effect and durability thereof. When the penetration at 20° C. is 5 mm to 15 mm, it is easy to apply in a low-temperature environment, and the antiperspirant effect and its durability are excellent. On the other hand, when the penetration at 20° C. is less than 5 mm, the ease of application in a low-temperature environment is insufficient, and when it exceeds 15 mm, the antiperspirant effect and its durability are insufficient.

-shape-
The shape of the solid antiperspirant composition is not particularly limited and may be appropriately selected depending on the intended purpose, but from the viewpoint of antiperspirant effect and usability, a stick shape (bar shape) is preferred.

-container-
The solid antiperspirant composition of the present invention is not particularly limited, and is used by being filled in an ordinary container.
The container is not particularly limited as long as it can be filled with the solid antiperspirant composition, and can be appropriately selected from known containers, but stick containers are preferred.

The material of the stick container is not particularly limited and can be appropriately selected depending on the purpose. Examples include polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyvinyl chloride, ethylene-vinyl alcohol copolymer resin, acrylonitrile-styrene. resins such as copolymer resins, ABS resins, and polyamides; and glass. These can be used in a single layer or in combination of two or more layers.

-Production method-
The method for producing the solid antiperspirant composition of the present invention is not particularly limited and can be appropriately selected according to the purpose. ) component and, if necessary, the above component (E) and the above other components are mixed and sufficiently heated to a temperature at which the above component (C) melts to prepare a melt. A method of preparing an antiperspirant composition by adding the component (D) to the melt and further mixing the mixture and solidifying it by cooling to obtain a solid antiperspirant composition can be exemplified.
The solid antiperspirant composition in a desired shape can be obtained by filling the appropriately selected container with the antiperspirant composition before cooling.
The temperature for cooling the mixture is not particularly limited as long as it can be solidified, and can be appropriately selected depending on the purpose, but -20°C to 20°C is preferable.

The solid antiperspirant composition may be prepared using an apparatus. The device is not particularly limited and can be appropriately selected from known devices. Examples thereof include a stirring device equipped with stirring blades capable of mixing the whole.
The stirring blade is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include propellers, turbines, and dispersers.

-Applications-
The solid antiperspirant composition has excellent antiperspirant effect and persistence, does not leave stickiness after application or white residue after application and drying, is easy to apply even in a low temperature environment, and does not easily break even after repeated use. Moreover, since the agent is excellent in stability, it can be suitably used as, for example, an antiperspirant, a deodorant, an antiperspirant and deodorant, and a deodorant.

The present invention will be more specifically described below based on Examples, Comparative Examples, and Formulation Examples, but the present invention is not limited to the following Examples and Formulation Examples.

The content of each component described in Examples, Comparative Examples, and Formulation Examples is shown in "% by mass", and all values are converted to pure content.
Further, the mass ratio of the total content of the component (A) and the component (B) to the content of the component (C) [((A) + (B)) / (C)], and The mass ratio of the content of component (C) to the content of component (E) [(E)/(C)] was obtained and described by rounding off to the second decimal place.

(Examples 1 to 19 and Comparative Examples 1 to 7)
Solid antiperspirant compositions having compositions and contents shown in Tables 1 to 4 below were prepared by the following method.
The (A) component, (B) component, (C) component, (E) component, and common component were mixed and sufficiently heated to a temperature at which the (C) component melts to prepare a melt. An antiperspirant composition was prepared by adding the component (D) to the melt and further mixing. After that, the antiperspirant composition is poured into an antiperspirant stick container (diameter 35 mm, height 100 mm, manufactured by Yoshino Kogyosho Co., Ltd.) and solidified under cooling conditions (-10 ° C.), Examples 1 to 19 and comparison Stick-shaped solid antiperspirant compositions (sticks) of Examples 1 to 7 were prepared.

<Measurement of Penetration>
The prepared solid antiperspirant compositions of Examples 1 to 19 and Comparative Examples 1 to 7 were respectively stored in an environment of 20 ° C. for 24 hours, and measured with a penetrometer (Nippon Oil Testing Machine Industry Co., Ltd.) in an environment of 20 ° C. (manufactured by the company) was used, and the penetration (mm) was measured under the conditions of a total mass of 50 g and a penetration time of 5 seconds. When measuring the penetration, the same solid antiperspirant composition was measured twice on the flat surface of each solid antiperspirant composition, and the average value was taken as the measured value. The results are shown in Tables 1 to 4 below.
A suitable value for the penetration is 5 mm to 15 mm.

Regarding the prepared solid antiperspirant compositions of Examples 1 to 19 and Comparative Examples 1 to 7, "antiperspirant effect", "durability of antiperspirant effect", "white residue after application drying ", "stability of the agent", "ease of application in a low-temperature environment", "no stickiness after application", and "hardness of the agent to break" were evaluated. The results are shown in Tables 1 to 4 below.

<Anti-perspirant effect>
20 expert panelists (10 males and 10 females) applied each solid antiperspirant composition (approximately 17 mg) to the inside of the forearm in a circular area with a diameter of 3 cm and tested at room temperature (25°C). dried. After that, each specialized panelist rested for 20 minutes in a high-temperature environment (38 ° C., 40% RH), and then used a perspiration meter (SKN-2000, manufactured by Nishizawa Electric Instrument Co., Ltd.) to determine the applied site and non-applied The amount of perspiration was measured at the site (circular area of 3 cm diameter on the inner side of the forearm). Based on the measured amount of perspiration, the value of the antiperspirant rate (%) shown by the following formula (1) is calculated, and the average value of the antiperspirant rate (%) of 20 professional panelists is calculated from the obtained value, The "antiperspirant effect" was evaluated based on the following evaluation criteria. If the evaluation is "○" or "⊚", the "antiperspirant effect" is good.
Antiperspirant rate (%) = [(Amount of perspiration at unapplied site) - (Amount of perspiration at applied site)]/(Amount of perspiration at non-applied site) x 100 Formula (1)
－Evaluation Criteria for “Anti-perspirant Effect”－
◎: The average antiperspirant rate of 20 people is 40% or more ○: The average antiperspirant rate of 20 people is 30% or more and less than 40% △: The average antiperspirant rate of 20 people is 20% or more and 30% Less than ×: The average antiperspirant rate of 20 people is less than 20%

<Durability of antiperspirant effect>
20 expert panelists (10 males and 10 females) applied each solid antiperspirant composition (approximately 150 mg) to the armpits and dried at room temperature (25° C.). After that, each expert panelist exercised on a fitness bike for 30 minutes in a high temperature environment (38° C., 40% RH). After that, each expert panelist rested at room temperature (25° C.) for 3 hours, entered the high temperature environment again after 3 hours, and exercised on a fitness bike for 30 minutes. "Durability of antiperspirant effect" was evaluated based on the following evaluation criteria from the number of expert panelists who judged "durability of antiperspirant effect is good" after the exercise. If the evaluation is "○" or "⊚", the "sustainability of the antiperspirant effect" is good.
-Evaluation Criteria for “Durability of Antiperspirant Effect”-
◎: 17 to 20 people answered that the antiperspirant effect lasts longer ○: 11 to 16 people answered that the antiperspirant effect lasts longer The number of people who answered that the perspiration effect lasts longer than 6 people and no more than 10 people ×: The number of people who answered that the antiperspirant effect lasts longer is 5 people or less

<White residue after drying>
After applying each solid antiperspirant composition (about 150 mg) to black artificial leather (length 10 cm, width 10 cm, protein leather, manufactured by Ideatex Japan Co., Ltd.) and drying at room temperature (25 ° C.) , One expert panelist visually observed the state of white residue, and evaluated "white residue after coating and drying" based on the following evaluation criteria. If the evaluation is "○" or "⊚", "white residue after coating and drying" is good.
-Evaluation criteria for "white residue after application and drying"-
◎: No white residue ○: Partial white residue ×: White residue

<Stability of agent>
Ten bottles of each of the prepared solid antiperspirant compositions were prepared and placed in a constant temperature bath at 45°C and allowed to stand for one week. Next, each solid antiperspirant composition was returned to room temperature (25 ° C.), and one expert panelist visually observed the presence or absence of oil floating on the surface of the agent. ” was evaluated. If the evaluation is "○" or "⊚", the "stability of agent" is good.
-Evaluation Criteria for “Stability of Drugs”-
◎: 10 threads with no oil floating on the surface ○: 8 to 9 threads with no oil floating on the surface △: 5 to 7 threads without oil floating on the surface ×: Oil floating on the surface 4 or less

<Ease of application in low temperature environments>
20 expert panelists (10 men, 10 women) applied each solid antiperspirant composition stored for 6 hours in a low temperature environment (10°C) to the axilla in 5 reciprocations under a low temperature environment (10°C). (about 150 mg), and from the number of expert panelists who judged that it was "easy to apply even in a low temperature environment", "ease of application in a low temperature environment" was evaluated based on the following evaluation criteria. If the evaluation is "◯" or "⊚", the "ease of application under low temperature environment" is good.
-Evaluation criteria for “ease of application in low-temperature environments”-
◎: 17 to 20 people answered that it was “easy to apply even in a low temperature environment” ○: 11 to 16 people answered that it was “easy to apply even in a low temperature environment” △: “Can be applied even in a low temperature environment 6 people or more and 10 or less people who answered that it is easy" ×: 5 people or less who answered that it is "easy to apply even in a low temperature environment"

<No stickiness after application>
20 expert panelists (10 males and 10 females) applied each solid antiperspirant composition to the inside of the forearm in a linear range of 10 cm in length (approximately 150 mg) in 5 reciprocations. , "No stickiness after application" was evaluated based on the following evaluation criteria from the number of expert panelists who judged "No stickiness after application". If the evaluation is "○" or "⊚", the "non-stickiness after application" is good.
-Evaluation criteria for "non-stickiness after application"-
◎: 17 to 20 people who answered “not sticky after application” ○: 11 to 16 people who answered “not sticky after application” △: People who answered “not sticky after application” is 6 or more and 10 or less ×: 5 or less people answered “not sticky after application”

<Difficulty in breaking agent>
Prepare 100 each of the prepared solid antiperspirant compositions, rotate the delivery part of the antiperspirant stick container, and rotate one reciprocation up and down as one rotation. One expert panelist visually observed whether or not breakage occurred, determined the number of breakages of the agent, and evaluated "hardness of agent breakage" based on the following evaluation criteria. If the evaluation is "○" or "⊚", the "hardness of the agent to break" is good.
－Evaluation Criteria for “Difficulty in Breaking Agent”－
◎: The number of breakages of the agent is 0 out of 100 ○: The number of breakages of the agent is 1 or more and less than 6 out of 100 △: The number of breakages of the agent is 6 or more and less than 10 out of 100 ×: The number of folds of the agent is 10 or more out of 100

(Prescription example 1)
Solid antiperspirant compositions of Formulation Example 1 were prepared in the same manner as in Examples 1 to 19 and Comparative Examples 1 to 7 according to the compositions and contents shown in Table 5 below, and each evaluation was performed. The results are shown in Table 5 below.

(Prescription Examples 2-4)
According to the composition and content in Table 6 below, in the preparation of Examples 1 to 19 and Comparative Examples 1 to 7, when mixing the component (D), zinc oxide was added and mixed as the component (F). Solid antiperspirant compositions of Formulation Examples 2 to 4 were prepared in the same manner as in Examples 1 to 19 and Comparative Examples 1 to 7, except for the above, and each evaluation was performed. In addition, the "deodorizing effect" of the prepared solid antiperspirant compositions of Formulation Examples 2 to 4 was evaluated as follows. The results are shown in Table 6 below.

<Deodorizing effect>
A dispersion was prepared by dispersing 0.1 g of each of the solid antiperspirant compositions of Formulation Examples 2 to 4 in 1 mL of water. 450 μL of this dispersion liquid and 50 μL of 0.001 mass % isovaleric acid aqueous solution, which is a malodorous component, are added to a 30-mL vial, capped, and heated at 40° C. for 1 minute to prepare a test sample. bottom. Twenty expert panelists (10 males and 10 females) smelled the prepared test samples immediately after opening the lid, and evaluated the "odor intensity" based on the following "odor intensity" evaluation criteria. As for the results, the average score of the 20 professional evaluators was obtained, and the "deodorant effect" was evaluated from the obtained average score based on the following evaluation criteria for "deodorant effect". If the evaluation is "◯" or "⊚", the "deodorant effect" is good.
-Evaluation Criteria for “Odor Intensity”-
5 points: strong odor 4 points: strong odor 3 points: easily perceivable odor 2 points: weak odor that can be identified 1 point: barely perceptible odor 0 point: no odor - evaluation criteria for "deodorant effect" -
◎: The average score of "odor intensity" of 20 expert panelists is less than 2 points ○: The average score of "odor intensity" of 20 expert panelists is 2 or more and less than 3 points △: "Odor" of 20 expert panelists Average evaluation score of 3 points or more and less than 4 points for "strength" ×: Average evaluation score of 20 expert panelists for "odor strength" is 4 points or more

Details of each component used in the above Examples, Comparative Examples, and Formulation Examples are shown in Table 7 below.

The solid antiperspirant composition has excellent antiperspirant effect and persistence, does not leave stickiness after application or white residue after application and drying, is easy to apply even in a low temperature environment, and does not easily break even after repeated use. Moreover, since the agent has excellent stability, it can be suitably used as, for example, an antiperspirant, a deodorant, an antiperspirant and deodorant, and a deodorant.

Embodiments of the present invention are, for example, as follows.
<1> (A) From (dimethicone/phenyl vinyl dimethicone) crosspolymer, alkyl acrylate copolymer methylpolysiloxane ester, and 1,1′-methylene-bis(4-isocyanatocyclohexane)/polypropylene glycol copolymer at least one selected;
(B) a polyoxypropylene alkyl ether;
(C) a solid oil that is solid at 25°C;
(D) containing an antiperspirant component,
The content of the component (C) is 17% by mass to 23% by mass,
Mass ratio of the total content of the component (A) and the component (B) to the content of the component (C), represented by [((A) + (B)) / (C)] is 0.96 or more,
The solid antiperspirant composition has a penetration of 5 mm to 15 mm at 20°C.
<2> The content of the component (A) is 0.3% by mass to 1.5% by mass,
The content of the component (B) is 18% by mass to 22% by mass,
The content of the component (C) is 19% by mass to 21% by mass,
The solid antiperspirant composition according to <1>, wherein the content of component (D) is 5% by mass to 24% by mass.

Claims (3)

(A) a (dimethicone/phenyl vinyl dimethicone) crosspolymer, or a combination of said (dimethicone/phenyl vinyl dimethicone) crosspolymer and an alkyl acrylate copolymer methylpolysiloxane ester;
(B) a polyoxypropylene alkyl ether;
(C) a solid oil that is solid at 25°C;
(D) an antiperspirant component;
(E) a silicone that is liquid at 25°C;
contains
The component (C) is at least one selected from stearyl alcohol, hydrogenated castor oil, and paraffin,
The content of the component (A) is 0.3% by mass to 0.9% by mass,
The content of the component (B) is 16% by mass to 25% by mass,
The content of the component (C) is 19 % by mass to 21 % by mass,
The content of the component (D) is 2% by mass to 30% by mass,
The content of the component (E) is 27.448% by mass to 51.4% by mass,
Mass ratio of the total content of the component (A) and the component (B) to the content of the component (C), represented by [((A) + (B)) / (C)] is 0.96 to 1.2 ,
A solid antiperspirant composition characterized by having a penetration of 5 mm to 15 mm at 20°C. The content of the component (B) is 18% by mass to 22% by mass ,
The solid antiperspirant composition according to claim 1 , wherein the content of component (D) is 5% by mass to 24% by mass. Claim 1, wherein the mass ratio of the content of component (E) to the content of component (C) represented by [(E)/(C)] is from 1.31 to 2.45. 3. The solid antiperspirant composition according to any one of 2 to 3.