Aqueous composition for body

Abstract

To provide an aqueous composition for body enabling formation of a film that exhibits vapor barrier performance under low-humidity conditions and exhibits vapor release performance under high-humidity conditions.SOLUTION: An aqueous composition for body comprises: (A) a nonionic polymer with a viscosity of 10,000 mPa s or more at 25°C in a 2 mass% aqueous solution; (B) one or more selected from the group consisting of water-swelling clay minerals and water-swelling mica, having an aspect ratio of 150 or more; and water. The mass ratio [(A) / (B)] of component (A) to component (B) is 0.25 or more and 10 or less. The storage elastic modulus of the composition is 100 Pa or more and 5,000 Pa or less, as determined by dynamic viscoelastic measurement at 25°C, frequency 2 Hz, and strain 0.01%.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an aqueous composition for the body.

Background Art

[0002] As a method for imparting various performances such as gloss and good touch to keratin substances such as skin and hair, a technique for forming a cosmetic film on the surface of keratin substances is known. From the viewpoint of achieving both film-forming property and ease of adaptation to the skin, water-soluble polymers are used in film-forming external preparations for the skin (see, for example, Patent Documents 1 and 2).

[0003] Patent Document 1 discloses that an emulsion composition having a standard deviation of emulsion particle diameter of 0.5 or more can achieve a smooth and soft elongation while having a sufficient richness and a sense of modulation that gives a feeling of change. It is also described that the emulsion composition contains a hydrogel-forming agent, an organically modified clay mineral, and the like. Patent Document 2 discloses that a water-in-oil cosmetic composition containing, as an active ingredient, a compound that is solubilized by neutralization prevents bleeding and shows good stability. It is also described that the cosmetic composition contains a gelling agent, water, and a powder component.

[0004] External preparation compositions containing a water-soluble polymer and thickeners such as bentonite, hectorite, and swelling clay are also known. For example, Patent Document 3 discloses a root canal plugging agent composition based on a calcium hydroxide component, which contains calcium hydroxide or a component that generates calcium hydroxide as a powder component and contains a predetermined liquid component.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0006] By the way, it is known that skin damage is caused by a harsh humidity environment. For example, in a low humidity environment, problems due to dryness occur, and in a high humidity environment, the stratum corneum becomes congested and over-swollen, making the skin vulnerable to irritants. The stratum corneum of the skin adjusts the amount of water evaporation or absorption from the skin surface in response to the surrounding environment and functions to protect the skin. However, in daily life, the human skin is repeatedly exposed to severe humidity changes due to moving from an air-conditioned indoor environment to the outdoors, etc., so there is a concern that the function of the stratum corneum cannot respond sufficiently to humidity changes and damage accumulates on the skin.

[0007] Therefore, there is a need for an external preparation technology that can adjust the amount of water on the skin surface in response to the surrounding environment like the stratum corneum and suppress skin damage in both low humidity and high humidity environments. Specifically, it is considered that the above object can be achieved by an external preparation that exhibits water vapor barrier properties in a low humidity environment to enhance skin moisturization, and in a high humidity environment, the water vapor barrier properties decrease and switch to water vapor release properties, forming a film that does not prevent water vapor release from the stratum corneum. The present invention relates to a body aqueous composition capable of forming a film that exhibits high water vapor barrier properties in a low humidity environment and water vapor release properties in a high humidity environment. [Means for Solving the Problems]

[0008] The present inventors have found that the above problems can be solved by a body aqueous composition containing one or more selected from the group consisting of a predetermined nonionic polymer, a water-swellable clay mineral having an aspect ratio of a predetermined value or more, and water-swellable mica, and water, and having a storage elastic modulus in a predetermined range. That is, the present invention relates to the following. [1]A nonionic polymer having a viscosity of 10,000 mPa·s or more at 25°C in a 2 mass% aqueous solution, (B) one or more selected from the group consisting of a water-swellable clay mineral, a water-swellable phyllosilicate mineral, and a water-swellable mica having an aspect ratio of 150 or more, and a body aqueous composition containing water, wherein the mass ratio [(A) / (B)] of the component (A) to the component (B) is 0.25 or more and 10 or less, and the storage modulus of the composition measured by dynamic viscoelasticity measurement under the conditions of a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01% is 100 Pa or more and 5,000 Pa or less. [2]A cosmetic composition containing the body aqueous composition according to [1] above. [3]A method for using a composition, which comprises a step of applying the body aqueous composition according to [1] above or the cosmetic composition according to [2] above to a keratin base to form a film. [Advantages of the Invention]

[0009] According to the present invention, it is possible to provide a body aqueous composition capable of forming a film that exhibits high water vapor barrier properties in a low humidity environment and water vapor release properties in a high humidity environment. The composition has film-forming properties and can be used as various cosmetic compositions. [Modes for Carrying Out the Invention]

[0010] [Definition] As used herein, the "body aqueous composition" means an aqueous composition used for treating the surface of the body, for example, the surface of keratin substances such as skin, hair, eyelashes, eyebrows, nails, etc. The "aqueous composition" means a composition having water as a main component, preferably a composition having a water content of 50% by mass or more. The body aqueous composition of the present invention (hereinafter, also simply referred to as the "aqueous composition" or the "composition of the present invention") is preferably an aqueous composition for keratin substances, more preferably an aqueous composition for skin or hair, and still more preferably an aqueous composition for skin. The "keratin substance" as used herein means a keratin substance constituting a body part of an animal such as a human, such as hair, skin, and nails. In this specification, "containing component X" also includes blending component X.

[0011] In this specification, the water vapor barrier property in a low humidity environment is defined using the water vapor barrier property at a relative humidity of 40%, and the water vapor barrier property in a high humidity environment is defined using the water vapor barrier property at a relative humidity of 80% as indices. In the present invention, when the water vapor barrier property at a relative humidity of 40% is high, it can be regarded as "exhibiting a high water vapor barrier property in a low humidity environment". Also, in the following description, the property of exhibiting a water vapor barrier property in a low humidity environment and a water vapor release property in a high humidity environment may be referred to as "environmental responsiveness". In this specification, it can be regarded that the higher the difference between the water vapor barrier property at a relative humidity of 40% and the water vapor barrier property at a relative humidity of 80%, the higher the environmental responsiveness. Specifically, the environmental responsiveness can be evaluated by the method described in the examples.

[0012] [Aqueous composition for the body] The composition of the present invention is an aqueous composition for the body containing (A) a nonionic polymer having a viscosity of 10,000 mPa·s or more at 25°C in a 2% by mass aqueous solution, (B) one or more selected from the group consisting of a water-swellable clay mineral and a water-swellable mica having an aspect ratio of 150 or more, and water, wherein the mass ratio [(A) / (B)] of the component (A) to the component (B) is 0.25 or more and 10 or less, and the storage elastic modulus of the composition measured by dynamic viscoelasticity measurement under the conditions of a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01% is 100 Pa or more and 5,000 Pa or less. By having the above configuration, the composition of the present invention can form a film that exhibits a water vapor barrier property in a low humidity environment and a water vapor release property in a high humidity environment.

[0013] The reason why the composition of the present invention exhibits the above effects is not clear, but it is considered as follows. The nonionic polymer as component (A) has film-forming properties and is hydrophilic enough to prepare a 2% by mass aqueous solution. Therefore, it can form a film whose properties change triggered by moisture absorption and which can exhibit environmental responsiveness. However, when using only the nonionic polymer, there is a limit to improving the water vapor barrier property in a low humidity environment. Component (B) is a plate-like mineral with a high aspect ratio. When component (B) is added to component (A) to form a film, in the film, the plate-like surfaces of component (B) are dispersed so as to be substantially parallel to the film surface. And when water vapor permeates in the thickness direction of the film, it is considered that the so-called "labyrinth effect" is exhibited, in which the presence of component (B) lengthens the water vapor permeation path. Due to this labyrinth effect, an effect of improving the water vapor barrier property can be obtained. Since component (B) has a high aspect ratio, it is considered that the water vapor barrier property due to the labyrinth effect is more effectively exhibited. On the other hand, if component (B) aggregates in the film, a sufficient water vapor barrier property due to the labyrinth effect cannot be obtained. However, since component (B) is water-swellable and has a high affinity with component (A), it is considered that it is difficult to aggregate in the formed film. Furthermore, when the mass ratio [(A) / (B)] of the component (A) to the component (B) is within a predetermined range, it is considered that the dispersibility of the component (B) is improved and a high water vapor barrier property can be exhibited. Also, when the viscosity of the 2% by mass aqueous solution of component (A) at 25°C is a predetermined value or more and the storage elastic modulus of the obtained composition is within a predetermined range, it is considered that defects are less likely to occur in the labyrinth structure in the formed film, and the water vapor barrier property can be further improved. Furthermore, since both component (A) and component (B) are hydrophilic, the film containing component (A) and component (B) is sensitive to the surrounding humidity and absorbs moisture and swells in a high humidity environment. Therefore, in a high humidity environment, as the film swells, the dispersion state of component (B) in component (A) changes, defects occur in the labyrinth structure in the film, the water vapor barrier property is not exhibited, and it is considered that the water vapor release property changes.

[0014] <Component (A): Nonionic polymer> Component (A) is a nonionic polymer having a viscosity of 10,000 mPa·s or more at 25°C in a 2% by mass aqueous solution. As used herein, the term "nonionic polymer" means a polymer that substantially does not have ionic groups, namely, cationic groups, anionic groups, and amphoteric groups.

[0015] The viscosity at 25°C of a 2% by mass aqueous solution of component (A) is 10,000 mPa·s or more, preferably 12,000 mPa·s or more, more preferably 15,000 mPa·s or more, still more preferably 20,000 mPa·s or more, from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness. Also, it is preferably 1,000,000 mPa·s or less, more preferably 800,000 mPa·s or less, still more preferably 600,000 mPa·s or less, even more preferably 500,000 mPa·s or less, even more preferably 300,000 mPa·s or less, even more preferably 200,000 mPa·s or less, even more preferably 150,000 mPa·s or less. And the viscosity at 25°C of a 2% by mass aqueous solution of component (A) is 10,000 mPa·s or more, preferably 10,000 mPa·s or more and 1,000,000 mPa·s or less, more preferably 12,000 mPa·s or more and 800,000 mPa·s or less, still more preferably 15,000 mPa·s or more and 600,000 mPa·s or less, even more preferably 15,000 mPa·s or more and 500,000 mPa·s or less, even more preferably 15,000 mPa·s or more and 300,000 mPa·s or less, even more preferably 20,000 mPa·s or more and 200,000 mPa·s or less, even more preferably 20,000 mPa·s or more and 150,000 mPa·s or less. The viscosity of a 2% by mass aqueous solution of component (A) can be measured by the method described in the examples.

[0016] Examples of component (A) include polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide, polymers containing structural units derived from (meth)acrylate esters, nonionic polysaccharides, etc., and one or more of these can be used. In this specification, "(meth)acryl" means acrylic or methacrylic, and "(meth)acrylate" means acrylate or methacrylate.

[0017] Examples of the polymer containing a structural unit derived from an N-substituted or unsubstituted (meth)acrylamide include a homopolymer of an N-substituted or unsubstituted (meth)acrylamide, a copolymer of an N-substituted (meth)acrylamide and an N-unsubstituted (meth)acrylamide, and a copolymer of an N-substituted or unsubstituted (meth)acrylamide and a nonionic monomer such as a (meth)acrylate ester, vinylpyrrolidone, vinyl acetate, or vinyl methyl ether. Examples of the N-substituted (meth)acrylamide include dialkyl (meth)acrylamides such as dimethyl (meth)acrylamide and diethyl (meth)acrylamide. Examples of the N-unsubstituted (meth)acrylamide include acrylamide and methacrylamide.

[0018] Examples of the (meth)acrylate ester include an alkyl (meth)acrylate ester, a hydroxyalkyl (meth)acrylate ester, and an alkyl ether (meth)acrylate ester.

[0019] Specific examples of polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide include polyacrylamide, polymethacrylamide, polydimethylacrylamide, poly(diethylacrylamide), ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, (vinylpyrrolidone / (meth)acrylamide) copolymer, ((meth)acrylamide / alkyl acrylate) copolymer, (dimethylacrylamide / alkyl acrylate) copolymer, (dimethylacrylamide / hydroxyethyl acrylate / methoxyethyl acrylate) copolymer, and the like. Among these, preferably, it contains one or more selected from the group consisting of polyacrylamide, polymethacrylamide, polydimethylacrylamide, poly(diethylacrylamide), and ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, and more preferably, it contains polyacrylamide.

[0020] Examples of polymers containing structural units derived from (meth)acrylate esters include homopolymers of (meth)acrylate esters and copolymers of (meth)acrylate esters and nonionic monomers such as vinylpyrrolidone, vinyl acetate, and vinyl methyl ether. Examples of (meth)acrylate esters include alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates, and alkyl (meth)acrylate ethers. Note that polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide are excluded from the "polymers containing structural units derived from (meth)acrylate esters". Specific examples of polymers containing structural units derived from (meth)acrylate esters include (vinylpyrrolidone / alkyl acrylate) copolymer, (hydroxyethyl acrylate / methoxyethyl acrylate) copolymer, and the like.

[0021] Examples of nonionic polysaccharides include nonionic polysaccharides such as starch, cellulose, guar gum, tara gum, locust bean gum, glucomannan, and derivatives thereof. Among these, from the viewpoints of film formation, improvement of water vapor barrier properties in a low humidity environment, and improvement of environmental responsiveness, the nonionic polysaccharides preferably include derivatives of nonionic polysaccharides, more preferably include derivatives of nonionic polysaccharides having a substituent containing an alkyl group having 8 or more carbon atoms, and still more preferably include cellulose derivatives having a substituent containing an alkyl group having 8 or more carbon atoms.

[0022] Examples of the substituent containing an alkyl group having 8 or more carbon atoms preferably include an alkyl group having 8 or more carbon atoms, a hydroxyalkyl group containing an alkyl group having 8 or more carbon atoms, or a hydroxyalkyl-alkyl ether group containing an alkyl group having 8 or more carbon atoms. Among these, preferably one or more selected from the group consisting of an alkyl group having 8 or more carbon atoms and a hydroxyalkyl-alkyl ether group containing an alkyl group having 8 or more carbon atoms, and more preferably a hydroxyalkyl-alkyl ether group containing an alkyl group having 8 or more carbon atoms.

[0023] The alkyl group having 8 or more carbon atoms is preferably an alkyl group having 8 to 22 carbon atoms, more preferably an alkyl group having 12 to 22 carbon atoms, still more preferably an alkyl group having 16 to 22 carbon atoms, and even more preferably an alkyl group having 18 to 22 carbon atoms. Specific examples of the alkyl group having 8 or more carbon atoms include, for example, linear or branched octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, myristyl group, pentadecyl group, palmitoyl group, heptadecyl group, stearyl group, isostearyl group, nonadecyl group, icosyl group, heneicosyl group, and behenyl group. Among these, from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness, the alkyl group having 8 or more carbon atoms is preferably at least one selected from the group consisting of dodecyl group, tridecyl group, myristyl group, pentadecyl group, cetyl group, heptadecyl group, stearyl group, isostearyl group, nonadecyl group, icosyl group, henicosyl group, and behenyl group, more preferably at least one selected from the group consisting of cetyl group, stearyl group, isostearyl group, icosyl group, henicosyl group, and behenyl group, and still more preferably at least one selected from the group consisting of stearyl group and behenyl group.

[0024] In a derivative of a nonionic polysaccharide having a substituent containing an alkyl group having 8 or more carbon atoms, the parent nonionic polysaccharide into which the substituent containing an alkyl group having 8 or more carbon atoms is introduced may have a substituent containing a short-chain alkyl group having 3 or less carbon atoms. Specifically, it may be a compound in which one or more selected from the group consisting of an alkyl group, a hydroxyalkyl group, and a dihydroxyalkyl group having 3 or less carbon atoms are substituted on an unsubstituted nonionic polysaccharide. Also, the parent nonionic polysaccharide is preferably a compound having a cellulose skeleton. That is, the "unsubstituted nonionic polysaccharide" is preferably cellulose.

[0025] Examples of the compound having a cellulose skeleton, which is the parent nonionic polysaccharide, include alkylcellulose having only an alkyl group having 3 or less carbon atoms, hydroxyalkylcellulose having a hydroxyalkyl group or a dihydroxyalkyl group, and hydroxyalkyl-alkylcellulose having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group having 3 or less carbon atoms.

[0026] Specific examples of the alkylcellulose having only an alkyl group having 3 or less carbon atoms include methylcellulose, ethylcellulose, propylcellulose, methyl ethylcellulose, methyl propylcellulose, ethyl propylcellulose, and the like. Specific examples of hydroxyalkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group include hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, dihydroxypropyl hydroxyethyl cellulose, dihydroxypropyl hydroxypropyl cellulose, etc., and one or more selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, and dihydroxypropyl hydroxyethyl cellulose are preferred. Specific examples of hydroxyalkyl-alkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group having 3 or less carbon atoms include hydroxymethyl-methyl cellulose, hydroxyethyl-methyl cellulose, hydroxymethyl-propyl cellulose, hydroxyethyl-methyl cellulose, hydroxyethyl-ethyl cellulose, hydroxyethyl-propyl cellulose, hydroxypropyl-methyl cellulose, hydroxypropyl-ethyl cellulose, hydroxypropyl-propyl cellulose, dihydroxypropyl hydroxyethyl-methyl cellulose, dihydroxypropyl hydroxypropyl-methyl cellulose, etc.

[0027] The cellulose derivative having a substituent containing an alkyl group having 8 or more carbon atoms is more preferably a compound in which a substituent containing an alkyl group having 8 or more carbon atoms is introduced into the cellulose having the hydroxyalkyl group or the dihydroxyalkyl group.

[0028] Specific examples of the compound in which a substituent containing an alkyl group having 8 or more carbon atoms is introduced into the cellulose having a hydroxyalkyl group or a dihydroxyalkyl group include cetyl hydroxyethyl cellulose (such as "Polysurf67CS" manufactured by Ashland), stearoxy PG hydroxyethyl cellulose (display name).

[0029] Component (A) preferably contains at least one selected from the group consisting of polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide and nonionic polysaccharides from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness. Among them, from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, improvement of environmental responsiveness, and availability, component (A) preferably contains at least one selected from the group consisting of polyacrylamide, polymethacrylamide, polydimethylacrylamide, polydiethylacrylamide, ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, and cellulose derivatives having a substituent containing an alkyl group having 8 or more carbon atoms; more preferably contains at least one selected from the group consisting of polyacrylamide, hydroxyalkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group, a compound obtained by introducing a substituent containing an alkyl group having 8 or more carbon atoms into the hydroxyalkyl cellulose, and a compound obtained by introducing a substituent containing an alkyl group having 8 or more carbon atoms into hydroxyalkyl-alkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group having 3 or less carbon atoms; still more preferably contains at least one selected from the group consisting of polyacrylamide, cetyl hydroxyethyl cellulose, and stearoxy PG hydroxyethyl cellulose; and even more preferably contains at least one selected from the group consisting of polyacrylamide and stearoxy PG hydroxyethyl cellulose.

[0030] <Component (B): Water-swellable clay minerals, water-swellable phyllosilicate minerals, and water-swellable mica having an aspect ratio of 150 or more> Component (B) is at least one selected from the group consisting of water-swellable clay minerals, water-swellable phyllosilicate minerals, and water-swellable mica having an aspect ratio of 150 or more. The water-swellability referred to here means the property of swelling when dispersed in water. More specifically, it refers to those having a water swelling degree of 40 mL / 2 g or more determined by the following test method. (Test method) Put 100 mL of ion-exchanged water into a 100 mL graduated cylinder. Add 2 g of component (B) little by little in several portions so as not to stick to the wall of the graduated cylinder. After all of component (B) has naturally settled to the bottom of the graduated cylinder, read the volume (mL) of component (B) after 24 hours from the scale. The average value of three tests is taken as the water swelling degree (mL / 2 g) of component (B).

[0031] From the viewpoints of suppressing aggregation of component (B), improving water vapor barrier properties in a low humidity environment, and improving environmental responsiveness, the water swelling degree of component (B) is 40 mL / 2 g or more, preferably 42 mL / 2 g or more, more preferably 45 mL / 2 g or more, still more preferably 50 mL / 2 g or more. The upper limit is not particularly limited, but is usually 90 mL / 2 g or less, preferably 80 mL / 2 g or less, more preferably 75 mL / 2 g or less. And the water swelling degree of component (B) is preferably 40 mL / 2 g or more and 90 mL / 2 g or less, more preferably 42 mL / 2 g or more and 90 mL / 2 g or less, still more preferably 45 mL / 2 g or more and 80 mL / 2 g or less, even more preferably 50 mL / 2 g or more and 75 mL / 2 g or less.

[0032] From the viewpoints of improving water vapor barrier properties in a low humidity environment and improving environmental responsiveness, the aspect ratio of component (B) is 150 or more, preferably 160 or more, more preferably 180 or more, still more preferably 190 or more. The upper limit is not particularly limited, but is usually 2000 or less, preferably 1000 or less, more preferably 600 or less, still more preferably 500 or less, even more preferably 400 or less. And the aspect ratio of component (B) is 150 or more, preferably 150 or more and 1000 or less, more preferably 160 or more and 600 or less, still more preferably 180 or more and 500 or less, even more preferably 190 or more and 400 or less. The aspect ratio of component (B) can be measured according to the method described in Clay Science, Vol. 50, No. 3, 162 - 174 (2012), specifically, the method described in the examples.

[0033] The average particle size of component (B) is preferably 100 nm or more, more preferably 200 nm or more, still more preferably 300 nm or more, and preferably 2000 nm or less, more preferably 1500 nm or less, still more preferably 1000 nm or less, from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness. And the average particle size of component (B) is preferably 100 nm or more and 2000 nm or less, more preferably 200 nm or more and 1500 nm or less, still more preferably 300 nm or more and 1000 nm or less. The average particle size of component (B) can be measured by the dynamic light scattering method (DLS).

[0034] Component (B) is water-swellable and is one or more selected from the group consisting of clay minerals and mica, having an aspect ratio of 150 or more. Hereinafter, clay minerals and mica may be collectively referred to as "minerals". The above water-swellable clay minerals have cations (Na + , K + , Mg 2+ , Ca 2+ , etc.) between layers and swell by absorbing water. Specifically, smectite, bentonite, montmorillonite, beidellite, nontronite, saponite, stevensite, hectorite, etc. can be mentioned, and one or two or more of these can be used. Water-swellable mica has cations (Na + , K + , Mg 2+ , Ca 2+ , etc.) between layers among mica and swells by absorbing water. Specifically, sodium tetrasilicate mica, etc. can be mentioned.

[0035] Component (B) may be a mineral subjected to surface treatment, but from the viewpoint of water-swellability, it is preferably a mineral that has not been subjected to surface treatment or has been subjected to hydrophilic treatment, and more preferably a mineral that has not been subjected to surface treatment.

[0036] Component (B) is preferably at least one selected from the group consisting of water-swellable bentonite, water-swellable montmorillonite, and water-swellable mica from the viewpoints of improving the water vapor barrier property in a low humidity environment and improving the environmental responsiveness, and more preferably at least one selected from the group consisting of water-swellable bentonite, water-swellable montmorillonite, and sodium tetrasilicate mica.

[0037] Commercially available products can also be used as component (B). Specific examples thereof include "Kunipia G4" and "Kunipia F" (both are purified bentonite (montmorillonite)) manufactured by Kunimine Industries Co., Ltd., "Bengel HV" and "Bengel Next Nc" (both are bentonite) manufactured by Hoejun Co., Ltd., "NTS-5" (sodium tetrasilicate mica) manufactured by Toppan Industries Co., Ltd., and the like.

[0038] <Water> Since the composition of the present invention is an aqueous composition, it contains water. Deionized water or distilled water is preferred as the water. Note that tap water, groundwater, etc. sterilized with hypochlorous acid or the like may also be used as long as the stability of the composition is not impaired.

[0039] <Content> The content of component (A) in the composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, still more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, even more preferably 0.8% by mass or more, even more preferably 1.0% by mass or more, and even more preferably 1.2% by mass or more from the viewpoints of film-forming property and improvement of environmental responsiveness. Further, from the viewpoints of improvement of water vapor barrier property in a low-humidity environment and coatability, it is preferably 10% by mass or less, more preferably 8.0% by mass or less, still more preferably 5.0% by mass or less, and even more preferably 3.0% by mass or less. And the content of component (A) in the composition is preferably 0.1% by mass or more and 10% by mass or less, more preferably 0.2% by mass or more and 10% by mass or less, still more preferably 0.3% by mass or more and 8.0% by mass or less, even more preferably 0.5% by mass or more and 8.0% by mass or less, even more preferably 0.8% by mass or more and 5.0% by mass or less, even more preferably 1.0% by mass or more and 5.0% by mass or less, and even more preferably 1.2% by mass or more and 3.0% by mass or less.

[0040] The content of component (B) in the composition is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, even more preferably 0.2% by mass or more, and even more preferably 0.5% by mass or more from the viewpoints of film-forming property and improvement of water vapor barrier property in a low-humidity environment. Further, from the viewpoints of improvement of environmental responsiveness and improvement of dispersibility of component (B), it is preferably 10% by mass or less, more preferably 8.0% by mass or less, still more preferably 5.0% by mass or less, and even more preferably 3.0% by mass or less. And the content of component (B) in the composition is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.05% by mass or more and 8.0% by mass or less, still more preferably 0.1% by mass or more and 5.0% by mass or less, even more preferably 0.2% by mass or more and 3.0% by mass or less, and even more preferably 0.5% by mass or more and 3.0% by mass or less.

[0041] The mass ratio of component (A) to component (B) in the composition [(A) / (B)] is 0.25 or more, preferably 0.3 or more, more preferably 0.5 or more, still more preferably 0.8 or more, even more preferably 1.0 or more, and even more preferably 1.5 or more, from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness. Also, from the viewpoints of improvement of water vapor release property in a high humidity environment and improvement of environmental responsiveness, it is 10 or less, preferably 8.0 or less, more preferably 7.5 or less, still more preferably 6.5 or less, even more preferably 5.5 or less, and even more preferably 4.5 or less. And the mass ratio of component (A) to component (B) in the composition [(A) / (B)] is 0.25 or more and 10 or less, preferably 0.3 or more and 8.0 or less, more preferably 0.5 or more and 7.5 or less, still more preferably 0.8 or more and 6.5 or less, even more preferably 1.0 or more and 5.5 or less, and even more preferably 1.5 or more and 4.5 or less.

[0042] The total content of component (A) and component (B) in the composition is preferably 0.2% by mass or more, more preferably 0.5% by mass or more, still more preferably 1.0% by mass or more, even more preferably 1.5% by mass or more, and even more preferably 2.0% by mass or more, from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness. Also, from the viewpoints of improvement of blending stability and coatability, it is preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, even more preferably 5.0% by mass or less, and even more preferably 4.0% by mass or less. And the total content of component (A) and component (B) in the composition is preferably 0.2% by mass or more and 20% by mass or less, more preferably 0.5% by mass or more and 15% by mass or less, still more preferably 1.0% by mass or more and 10% by mass or less, even more preferably 1.5% by mass or more and 5.0% by mass or less, and even more preferably 2.0% by mass or more and 4.0% by mass or less.

[0043] From the viewpoints of making it an aqueous composition and improving the blending stability, the water content in the composition is preferably 50% by mass or more, more preferably 60% by mass or more, still more preferably 70% by mass or more, even more preferably 80% by mass or more, and even more preferably 85% by mass or more. The balance of components (A) and (B) may be the water content in the composition.

[0044] <Component (C): Glycerol or its condensate> From the viewpoints of improving the blending stability and improving the environmental responsiveness, the composition of the present invention can further contain (C) glycerol or its condensate. Examples of glycerol or its condensate include glycerol, diglycerol, polyglycerol, etc., and one or more of these can be used. Among the above, component (C) is preferably at least one selected from the group consisting of glycerol and diglycerol, and more preferably glycerol.

[0045] When the composition of the present invention contains component (C), the content of component (C) in the composition is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, still more preferably 0.5% by mass or more, and even more preferably 1.0% by mass or more from the viewpoints of improving the blending stability, improving the water vapor barrier property in a low humidity environment, and improving the environmental responsiveness. Also, from the viewpoint of improving the blending stability, it is preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, and even more preferably 5.0% by mass or less. And the content of component (C) in the composition is preferably 0.05% by mass or more and 20% by mass or less, more preferably 0.1% by mass or more and 15% by mass or less, still more preferably 0.5% by mass or more and 10% by mass or less, and even more preferably 1.0% by mass or more and 5.0% by mass or less.

[0046] In addition, the composition of the present invention may contain, as optional components, cationic polymers, anionic polymers, surfactants, pH adjusters, oils, feel improvers, colorants, antioxidants, anti-dandruff agents, vitamins, bactericides, anti-inflammatory agents, preservatives, chelating agents, humectants, pearlescent agents, ceramides, plant extracts, ultraviolet absorbers, and the like.

[0047] <Form of the composition> The composition of the present invention is an aqueous composition, preferably containing 50% by mass or more of water. The composition of the present invention may be in the form of an emulsion composition. From the viewpoints of being an aqueous composition and improving the feeling of use, the emulsion composition is preferably an oil-in-water type emulsion composition.

[0048] <Storage elastic modulus> From the viewpoints of film-forming property, improving water vapor barrier property in a low-humidity environment, and improving environmental responsiveness, the storage elastic modulus of the composition of the present invention measured by dynamic viscoelasticity measurement under the conditions of a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01% is 100 Pa or more and 5,000 Pa or less. When the storage elastic modulus of the composition is within the above range, it is considered that defects are less likely to occur in the maze structure in the formed film, and the water vapor barrier property can be enhanced. The storage elastic modulus of the composition is preferably 150 Pa or more, more preferably 200 Pa or more, still more preferably 300 Pa or more, even more preferably 500 Pa or more, even more preferably 700 Pa or more, even more preferably 800 Pa or more, from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness. Further, from the viewpoints of film-forming property and improvement of water vapor barrier property in a low humidity environment, it is preferably 4,000 Pa or less, more preferably 3,500 Pa or less, still more preferably 3,000 Pa or less, even more preferably 2,000 Pa or less. And the storage elastic modulus of the composition of the present invention, measured under the conditions of a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01% by dynamic viscoelasticity measurement, is 100 Pa or more and 5,000 Pa or less, preferably 150 Pa or more and 5,000 Pa or less, more preferably 200 Pa or more and 4,000 Pa or less, still more preferably 300 Pa or more and 3,500 Pa or less, even more preferably 500 Pa or more and 3,500 Pa or less, even more preferably 700 Pa or more and 3,000 Pa or less, even more preferably 800 Pa or more and 2,000 Pa or less. Specifically, the above storage elastic modulus can be measured by the method described in the examples.

[0049] Note that the storage elastic modulus of the composition can be adjusted to the above predetermined range by adjusting the types, blending amounts of components (A) and (B), the blending ratio of component (A) and component (B), and the like.

[0050] [Method for producing the composition] The method for producing the composition of the present invention is not particularly limited, and each component can be mixed and produced by a known method. The mixing conditions when mixing each component are not particularly limited, and usually, it can be carried out at 5 to 60°C for 0.1 to 12 hours using a known stirring device.

[0051] [Cosmetic composition] The present invention further provides a cosmetic composition containing the aqueous composition. By applying the cosmetic composition of the present invention to an object to be treated, a film can be formed that exhibits water vapor barrier property in a low humidity environment and water vapor release property in a high humidity environment. The content of the aqueous composition in the cosmetic composition is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, yet more preferably 90% by mass or more, and 100% by mass or less. The aqueous composition may be used as the cosmetic composition as it is.

[0052] Examples of the type of the cosmetic composition include skin cosmetic compositions, hair cosmetic compositions, etc., and preferably a skin cosmetic composition. Further, from the viewpoint of the effectiveness of the effect of the present invention of having film-forming properties, the cosmetic composition is preferably a leave-on type cosmetic composition that is used without being washed away after being applied to the object to be treated. Among the cosmetic compositions, examples of the product form of the skin cosmetic composition include makeup cosmetics, sunscreen products, makeup bases, emulsions, beauty essences, creams, etc. Examples of the product form of the hair cosmetic composition include hair shampoos, hair rinses, hair conditioners, hair treatments (including those not to be washed away), hair styling agents, hair colors, permanent agents, etc. Among these, from the viewpoint of the effectiveness of the effect of the present invention of having film-forming properties, the hair cosmetic composition is preferably a hair conditioner, a hair treatment, or a hair styling agent.

[0053] [Usage method] The present invention further provides a method for using a composition, which includes a step of applying the aqueous composition for the body or the cosmetic composition to a keratin substance to form a film. From the viewpoint of the effectiveness of the effect of the present invention, the keratin substance is preferably skin or hair, and more preferably skin.

[0054] In the method for using the composition of the present invention, first, the aqueous composition for the body or the cosmetic composition is applied to a keratin substance. Examples of the application method of the composition include a method of applying, casting, or spraying the composition onto the keratin substance, and preferably a method of applying.

[0055] When the keratin substance is the skin, the application amount of the composition to the skin is, from the viewpoint of forming a film that exhibits water vapor barrier properties in a low humidity environment and water vapor release properties in a high humidity environment, per 1 cm of skin 2 is preferably 0.01 mg or more and 50 mg or less, more preferably 0.1 mg or more and 30 mg or less.

[0056] When the keratin substance is hair, the application amount of the composition to the hair is, from the viewpoint of forming a film that exhibits water vapor barrier properties in a low humidity environment and water vapor release properties in a high humidity environment, the bath ratio (mass of the composition / dry mass of the hair to be applied) with respect to the mass of the hair to be applied, preferably 0.005 or more, more preferably 0.01 or more, still more preferably 0.05 or more, and preferably 20 or less, more preferably 15 or less, still more preferably 12 or less. The hair to which the composition is applied may be all of the hair or a part of it.

[0057] After applying the composition to the keratin substance, a step of rinsing off the composition may be performed, but from the viewpoint of the effectiveness of the effect of the present invention of having film-forming properties, a drying treatment is performed without performing the step of rinsing off the composition, and it is preferable to form a film on the surface of the keratin substance. When the keratin substance is the skin, natural drying may be performed. When the keratin substance is hair, in addition to natural drying, drying treatment can also be performed with a towel dry, a dryer, or the like.

[0058] Hereinafter, regarding the above-described embodiments, the present invention further discloses the following. <1> (A) A nonionic polymer having a viscosity of 10,000 mPa·s or more at 25°C in a 2% by mass aqueous solution, (B) one or more selected from the group consisting of a water-swellable clay mineral and a water-swellable mica having an aspect ratio of 150 or more, and a body aqueous composition containing water, wherein the mass ratio [(A) / (B)] of the component (A) to the component (B) is 0.25 or more and 10 or less, A body aqueous composition, wherein the storage elastic modulus of the composition measured by dynamic viscoelasticity measurement under the conditions of a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01% is 100 Pa or more and 5,000 Pa or less. <2> For the body aqueous composition of <1>, the viscosity of a 2% by mass aqueous solution of the component (A) at 25°C is preferably 10,000 mPa·s or more and 1,000,000 mPa·s or less, more preferably 12,000 mPa·s or more and 800,000 mPa·s or less, still more preferably 15,000 mPa·s or more and 600,000 mPa·s or less, even more preferably 15,000 mPa·s or more and 500,000 mPa·s or less, even more preferably 15,000 mPa·s or more and 300,000 mPa·s or less, even more preferably 20,000 mPa·s or more and 200,000 mPa·s or less, even more preferably 20,000 mPa·s or more and 150,000 mPa·s or less. <3> The body aqueous composition of <1> or <2>, wherein the component (A) contains at least one selected from the group consisting of a polymer containing a structural unit derived from N-substituted or unsubstituted (meth)acrylamide, a polymer containing a structural unit derived from (meth)acrylate, and a nonionic polysaccharide. <4> The body aqueous composition of <3>, wherein the polymer containing a structural unit derived from N-substituted or unsubstituted (meth)acrylamide contains at least one selected from the group consisting of a homopolymer of N-substituted or unsubstituted (meth)acrylamide, a copolymer of N-substituted (meth)acrylamide and N-unsubstituted (meth)acrylamide, and a copolymer of N-substituted or unsubstituted (meth)acrylamide and at least one nonionic monomer selected from the group consisting of (meth)acrylate, vinylpyrrolidone, vinyl acetate, and vinyl methyl ether. <5> The body aqueous composition of <3> or <4>, wherein the N-substituted (meth)acrylamide contains at least one dialkyl (meth)acrylamide selected from the group consisting of dimethyl (meth)acrylamide and diethyl (meth)acrylamide. <6> The aqueous composition for the body according to <3> or <4>, wherein the N-unsubstituted (meth)acrylamide is at least one selected from the group consisting of acrylamide and methacrylamide. <7> The polymer containing a structural unit derived from the N-substituted or unsubstituted (meth)acrylamide includes at least one selected from the group consisting of polyacrylamide, polymethacrylamide, polydimethylacrylamide, poly diethylacrylamide, ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, (vinylpyrrolidone / (meth)acrylamide) copolymer, ((meth)acrylamide / alkyl acrylate) copolymer, (dimethylacrylamide / alkyl acrylate) copolymer, and (dimethylacrylamide / hydroxyethyl acrylate / methoxyethyl acrylate) copolymer, preferably includes at least one selected from the group consisting of polyacrylamide, polymethacrylamide, polydimethylacrylamide, poly diethylacrylamide, and ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, and more preferably includes polyacrylamide. The aqueous composition for the body according to any one of <3> to <6>. <8> The polymer containing a structural unit derived from the (meth)acrylate includes at least one selected from the group consisting of a homopolymer of (meth)acrylate and a copolymer of (meth)acrylate and at least one nonionic monomer selected from the group consisting of vinylpyrrolidone, vinyl acetate, and vinyl methyl ether. The aqueous composition for the body according to any one of <3> to <7>. <9> The polymer containing a structural unit derived from the (meth)acrylate includes at least one selected from the group consisting of (vinylpyrrolidone / alkyl acrylate) copolymer and (hydroxyethyl acrylate / methoxyethyl acrylate) copolymer. The aqueous composition for the body according to any one of <3> to <8>. <10> The nonionic polysaccharide includes one or more nonionic polysaccharides selected from the group consisting of starch, cellulose, guar gum, tara gum, locust bean gum, and glucomannan, and derivatives thereof, preferably includes derivatives of nonionic polysaccharides, more preferably includes derivatives of nonionic polysaccharides having a substituent containing an alkyl group having 8 or more carbon atoms, and still more preferably includes a cellulose derivative having a substituent containing an alkyl group having 8 or more carbon atoms, and is a aqueous composition for body of any one of <3> to <9>.

[0059] <11> The substituent containing an alkyl group having 8 or more carbon atoms is preferably one or more selected from the group consisting of an alkyl group having 8 or more carbon atoms, a hydroxyalkyl group containing an alkyl group having 8 or more carbon atoms, and a hydroxyalkyl-alkyl ether group containing an alkyl group having 8 or more carbon atoms, preferably one or more selected from the group consisting of an alkyl group having 8 or more carbon atoms and a hydroxyalkyl-alkyl ether group containing an alkyl group having 8 or more carbon atoms, and more preferably is a hydroxyalkyl-alkyl ether group containing an alkyl group having 8 or more carbon atoms, and is a aqueous composition for body of <10>. <12> The alkyl group having 8 or more carbon atoms is preferably an alkyl group having 8 to 22 carbon atoms, more preferably an alkyl group having 12 to 22 carbon atoms, still more preferably an alkyl group having 16 to 22 carbon atoms, and even more preferably an alkyl group having 18 to 22 carbon atoms, and is a aqueous composition for body of <10> or <11>. <13> The alkyl group having 8 or more carbon atoms is preferably one or more selected from the group consisting of a dodecyl group, a tridecyl group, a myristyl group, a pentadecyl group, a cetyl group, a heptadecyl group, a stearyl group, an isostearyl group, a nonadecyl group, an icosyl group, a heneicosyl group, and a behenyl group, more preferably one or more selected from the group consisting of a cetyl group, a stearyl group, an isostearyl group, an icosyl group, a heneicosyl group, and a behenyl group, and still more preferably one or more selected from the group consisting of a stearyl group and a behenyl group, and is a aqueous composition for body of any one of <10> to <12>. <14> In a derivative of a nonionic polysaccharide having a substituent containing an alkyl group having 8 or more carbon atoms, the nonionic polysaccharide serving as a parent, into which the substituent containing an alkyl group having 8 or more carbon atoms is introduced, is a compound in which one or more selected from the group consisting of an alkyl group, a hydroxyalkyl group, and a dihydroxyalkyl group having 3 or less carbon atoms are substituted on an unsubstituted nonionic polysaccharide. A body aqueous composition according to any one of <10> to <13>. <15> The body aqueous composition according to <14>, wherein the nonionic polysaccharide serving as the parent is a compound having a cellulose skeleton. <16> The compound having a cellulose skeleton, which is the nonionic polysaccharide serving as the parent, is one or more selected from the group consisting of alkylcellulose having only an alkyl group having 3 or less carbon atoms, hydroxyalkylcellulose having a hydroxyalkyl group or a dihydroxyalkyl group, and hydroxyalkyl-alkylcellulose having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group having 3 or less carbon atoms. A body aqueous composition according to <15>. <17> The body aqueous composition according to <16>, wherein the alkylcellulose having only an alkyl group having 3 or less carbon atoms includes one or more selected from the group consisting of methylcellulose, ethylcellulose, propylcellulose, methyl ethylcellulose, methyl propylcellulose, and ethyl propylcellulose. <18> The body aqueous composition according to <16>, wherein the hydroxyalkylcellulose having a hydroxyalkyl group or a dihydroxyalkyl group includes one or more selected from the group consisting of hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, dihydroxypropyl hydroxyethylcellulose, and dihydroxypropyl hydroxypropylcellulose, and preferably includes one or more selected from the group consisting of hydroxyethylcellulose, hydroxypropylcellulose, and dihydroxypropyl hydroxyethylcellulose. <19> The hydroxyalkyl-alkyl cellulose having the hydroxyalkyl group or dihydroxyalkyl group and an alkyl group having 3 or less carbon atoms includes one or more selected from the group consisting of hydroxymethyl-methyl cellulose, hydroxyethyl-methyl cellulose, hydroxymethyl-propyl cellulose, hydroxyethyl-methyl cellulose, hydroxyethyl-ethyl cellulose, hydroxyethyl-propyl cellulose, hydroxypropyl-methyl cellulose, hydroxypropyl-ethyl cellulose, hydroxypropyl-propyl cellulose, dihydroxypropylhydroxyethyl-methyl cellulose, and dihydroxypropylhydroxypropyl-methyl cellulose, and is the aqueous composition for the body according to <16>. <20> The cellulose derivative having a substituent containing an alkyl group having 8 or more carbon atoms includes a compound obtained by introducing a substituent containing an alkyl group having 8 or more carbon atoms into the cellulose having the hydroxyalkyl group or dihydroxyalkyl group, and preferably includes one or more selected from the group consisting of cetyl hydroxyethyl cellulose and stearoxy PG hydroxyethyl cellulose, and is the aqueous composition for the body according to <10>.

[0060] <21> The component (A) includes one or more selected from the group consisting of polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide and nonionic polysaccharides, preferably one or more selected from the group consisting of polyacrylamide, polymethacrylamide, polydimethylacrylamide, poly(diethylacrylamide), ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, and cellulose derivatives having a substituent containing an alkyl group with 8 or more carbon atoms, more preferably polyacrylamide, hydroxyalkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group, a compound obtained by introducing a substituent containing an alkyl group with 8 or more carbon atoms, and a compound obtained by introducing a substituent containing an alkyl group with 8 or more carbon atoms into hydroxyalkyl-alkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group with 3 or less carbon atoms, still more preferably one or more selected from the group consisting of polyacrylamide, cetyl hydroxyethyl cellulose, and stearoxy PG hydroxyethyl cellulose, even more preferably one or more selected from the group consisting of polyacrylamide and stearoxy PG hydroxyethyl cellulose, a body aqueous composition of any one of <1> to <20>. <22> The body aqueous composition of any one of <1> to <21>, wherein the water swelling degree of the component (B) determined by the following test method is 40 mL / 2 g or more, preferably 40 mL / 2 g or more and 90 mL / 2 g or less, more preferably 42 mL / 2 g or more and 90 mL / 2 g or less, still more preferably 45 mL / 2 g or more and 80 mL / 2 g or less, even more preferably 50 mL / 2 g or more and 75 mL / 2 g or less. (Test method) Put 100 mL of ion-exchanged water into a 100 mL graduated cylinder. Add 2 g of the component (B) little by little in several portions so as not to stick to the wall surface of the graduated cylinder. After all of the component (B) has naturally settled to the bottom of the graduated cylinder, read the volume (mL) of the component (B) after 24 hours from the scale. The average value of three tests is taken as the water swelling degree (mL / 2 g) of the component (B). <23> The aspect ratio of the component (B) is preferably 150 or more and 1000 or less, more preferably 160 or more and 600 or less, still more preferably 180 or more and 500 or less, and even more preferably 190 or more and 400 or less, and the aqueous composition for the body is any one of <1> to <22>. <24> The average particle diameter of the component (B) is preferably 100 nm or more and 2000 nm or less, more preferably 200 nm or more and 1500 nm or less, and still more preferably 300 nm or more and 1000 nm or less, and the aqueous composition for the body is any one of <1> to <23>. <25> The water-swellable clay mineral contains one or more selected from the group consisting of smectite, bentonite, montmorillonite, beidellite, nontronite, saponite, stevensite, and hectorite, and the aqueous composition for the body is any one of <1> to <24>. <26> The water-swellable mica contains sodium tetrasilicate mica, and the aqueous composition for the body is any one of <1> to <25>. <27> The component (B) preferably contains one or more selected from the group consisting of water-swellable bentonite, water-swellable montmorillonite, and water-swellable mica, and more preferably contains one or more selected from the group consisting of water-swellable bentonite, water-swellable montmorillonite, and sodium tetrasilicate mica, and the aqueous composition for the body is any one of <1> to <26>. <28> The content of the component (A) in the aqueous composition for the body is preferably 0.1% by mass or more and 10% by mass or less, more preferably 0.2% by mass or more and 10% by mass or less, still more preferably 0.3% by mass or more and 8.0% by mass or less, even more preferably 0.5% by mass or more and 8.0% by mass or less, even more preferably 0.8% by mass or more and 5.0% by mass or less, even more preferably 1.0% by mass or more and 5.0% by mass or less, and even more preferably 1.2% by mass or more and 3.0% by mass or less, and the aqueous composition for the body is any one of <1> to <27>. <29> The content of the component (B) in the aqueous composition for the body is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.05% by mass or more and 8.0% by mass or less, still more preferably 0.1% by mass or more and 5.0% by mass or less, even more preferably 0.2% by mass or more and 3.0% by mass or less, and even more preferably 0.5% by mass or more and 3.0% by mass or less, and is any one of the aqueous compositions for the body of <1> to <28>. <30> The mass ratio [(A) / (B)] of the component (A) to the component (B) in the aqueous composition for the body is preferably 0.3 or more and 8.0 or less, more preferably 0.5 or more and 7.5 or less, still more preferably 0.8 or more and 6.5 or less, even more preferably 1.0 or more and 5.5 or less, and even more preferably 1.5 or more and 4.5 or less, and is any one of the aqueous compositions for the body of <1> to <29>.

[0061] <31> The total content of the component (A) and the component (B) in the aqueous composition for the body is preferably 0.2% by mass or more and 20% by mass or less, more preferably 0.5% by mass or more and 15% by mass or less, still more preferably 1.0% by mass or more and 10% by mass or less, even more preferably 1.5% by mass or more and 5.0% by mass or less, and even more preferably 2.0% by mass or more and 4.0% by mass or less, and is any one of the aqueous compositions for the body of <1> to <30>. <32> The content of water in the aqueous composition for the body is preferably 50% by mass or more, more preferably 60% by mass or more, still more preferably 70% by mass or more, even more preferably 80% by mass or more, and even more preferably 85% by mass or more, and is any one of the aqueous compositions for the body of <1> to <31>. <33> Furthermore, it contains (C) glycerin or its condensate, and is any one of the aqueous compositions for the body of <1> to <32>. <34> The glycerin or its condensate contains one or more selected from the group consisting of glycerin, diglycerin, and polyglycerin, preferably contains one or more selected from the group consisting of glycerin and diglycerin, and more preferably contains glycerin, and is the aqueous composition for the body of <33>. <35> The content of the component (C) in the aqueous composition for the body is preferably 0.05% by mass or more and 20% by mass or less, more preferably 0.1% by mass or more and 15% by mass or less, still more preferably 0.5% by mass or more and 10% by mass or less, and even more preferably 1.0% by mass or more and 5.0% by mass or less, which is the aqueous composition for the body of <33> or <34>. <36> The storage elastic modulus of the aqueous composition for the body, measured by dynamic viscoelasticity measurement under the conditions of a temperature of 25 °C, a frequency of 2 Hz, and a strain of 0.01%, is preferably 150 Pa or more and 5,000 Pa or less, more preferably 200 Pa or more and 4,000 Pa or less, still more preferably 300 Pa or more and 3,500 Pa or less, even more preferably 500 Pa or more and 3,500 Pa or less, even more preferably 700 Pa or more and 3,000 Pa or less, and even more preferably 800 Pa or more and 2,000 Pa or less, which is the aqueous composition for the body of any one of <1> to <35>. <37> A cosmetic composition containing the aqueous composition for the body of any one of <1> to <36>. <38> The content of the aqueous composition for the body in the cosmetic composition is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, and even more preferably 90% by mass or more, and 100% by mass or less, which is the cosmetic composition of <37>. <39> The cosmetic composition is a skin cosmetic composition or a hair cosmetic composition, and is preferably a skin cosmetic composition, which is the cosmetic composition of <37> or <38>. <40> The cosmetic composition is preferably a leave-on type cosmetic composition that is used without being washed away after being applied to the object to be treated, which is the cosmetic composition of any one of <37> to <39>.

[0062] <41> A method for using a composition, which comprises a step of applying any one of the aqueous compositions for the body of <1> to <36> or any one of the cosmetic compositions of <37> to <40> to a keratin substance to form a film. <42> The method of use according to <41>, wherein the keratin substance is preferably skin or hair, more preferably skin.

Examples

[0063] Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to the scope of the examples. The measurements and evaluations in the examples were carried out by the following methods.

[0064] (Measurement of viscosity of 2% by mass aqueous solution of nonionic polymer) A 2% by mass aqueous solution of the nonionic polymer (component (A) or component (A')) used in each example was prepared, and the viscosity of the aqueous solution at 25 °C was measured by the following method. In this example, nonionic polymers or anionic polymers other than component (A) were denoted as "component (A')". ·Less than 500 mPa·s: Measured at 10 rpm using a Brookfield viscometer "DV2T" manufactured by Eiko Seiki Co., Ltd., spindle: CPA-41Z (angle 3 deg, radius 24 mm). ·500 mPa·s or more and less than 3,000 mPa·s: Measured at 30 rpm using a B-type viscometer "TVB-10" manufactured by Toki Sangyo Co., Ltd., spindle: M3. ·3,000 mPa·s or more and less than 20,000 mPa·s: Measured at 30 rpm using a B-type viscometer "TVB-10" manufactured by Toki Sangyo Co., Ltd., spindle: M4. ·20,000 mPa·s or more and less than 30,000 mPa·s: Measured at 10 rpm using a B-type viscometer "TVB-10" and a "T-stage", T-C, manufactured by Toki Sangyo Co., Ltd. ·30,000 mPa·s or more: Measured at 10 rpm using a B-type viscometer "TVB-10" and a "T-stage", T-D, manufactured by Toki Sangyo Co., Ltd.

[0065] (Measurement of aspect ratio of component (B) or component (B')) The aspect ratio of component (B) or component (B') in the table was determined according to the method described in Clay Science, Vol. 50, No. 3, pp. 162-174 (2012). In the present examples, minerals other than component (B) are referred to as "component (B')". Ion-exchanged water and aqueous dispersions of component (B) or component (B') at concentrations of 0.5 mass%, 0.25 mass%, and 0.1 mass% were measured using a rheometer ("MCR502" manufactured by Anton Paar) at 25°C and a shear rate of 100 s -1 The reduced viscosity of the aqueous dispersion of component (B) or component (B') at each concentration was calculated using the viscosity of the obtained aqueous dispersion, the viscosity of water, and the volume ratio of component (B) or component (B'). A regression line was created with the reduced viscosity value on the vertical axis and the volume ratio of component (B) or component (B') on the horizontal axis, and the intrinsic viscosity of component (B) or component (B') was calculated from the intercept. The intrinsic viscosity obtained was substituted into the following Simha formula described in Journal of Physical Chemistry, 44, 25-34 (1940) to calculate the aspect ratio of component (B) or component (B').

number

[0066] In addition, among the components (B) and (B') listed in the table, the aspect ratios of the naturally occurring clay minerals (Kunipia G4, Kunipia F, Wenger HV, Wenger Next NC, and kaolin) were measured after the following washing procedure. The clay mineral was washed twice with a 1M% sodium acetate aqueous solution (pH 5.0) to dissolve and remove carbonates, and then centrifuged to remove the supernatant. Next, the clay mineral was washed three times with a 2N NaCl aqueous solution to remove all the interlayer cations of the clay mineral. +It was replaced. The supernatant was removed again by centrifugation, and it was washed three times with an aqueous solution of 70% - isopropyl alcohol. After filtering with a membrane filter (Omnipore Membrane Filters 1.0μm JA), the clay mineral cake was air-dried, ground in a mortar, and then used for measurement.

[0067] Also, for clay minerals (Laponite XLS, kaolin, PDM-40L) whose water dispersion viscosity is almost the same as that of water, a regression line could not be created by the above method. This means that the aspect ratio is extremely small, and it was determined that the aspect ratio is 10 or less. In addition, those that do not mix well with water, such as organically modified clays (Moistnite WO, Smeton SAN-P), could not have their aspect ratio measured by the above method.

[0068] (Measurement of the water swelling degree of component (B) or component (B’)) 100 mL of ion-exchanged water was put into a 100 mL graduated cylinder. 2 g of component (B) or component (B’) was added little by little in several portions so as not to stick to the wall surface of the graduated cylinder. After all of component (B) or component (B’) had naturally settled to the bottom of the graduated cylinder, the volume (mL / 2 g) of component (B) or component (B’) after 24 hours had elapsed was read from the scale. The test was conducted three times, and the average value was shown in the table as the “water swelling degree (mL / 2 g)”. In addition, for those that do not mix well with water, such as organically modified clays (Moistnite WO, Smeton SAN-P), the water swelling degree could not be measured.

[0069] (Measurement of the storage elastic modulus G’ of the composition) Dynamic viscoelasticity measurement was performed on the aqueous compositions for the body of each example. Using a rheometer (“MCR502” manufactured by Anton Paar), the storage elastic modulus G’ was measured at a temperature of 25°C, a measurement frequency of 2 Hz, and a strain from 0.001% to 100%. The G’ at a strain of 0.01% which was a flat region in the measurement chart was shown in the table.

[0070] (Measurement of water vapor barrier property (humidity 40%)) 1 g of each aqueous body composition was applied to filter paper (ADVANTEC, No. 1, Φ70 mm) and dried overnight. 20 g of silica was placed as a desiccant in a cup for water vapor permeability test (Φ60 mm, capacity 40 mL) and covered with the aforementioned filter paper. After measuring the initial weight of the filter paper + cup, it was placed in a thermo-hygrostat (ESPEC "SH-262") set at a temperature of 35 °C and a humidity of 40%, and the weights of the filter paper + cup after 1 hour, 2 hours, and 3 hours were measured respectively. The value obtained by subtracting the initial weight of the filter paper + cup from the weight of the filter paper + cup at each time was taken as the moisture absorption amount (g) at each time. The slope of the linear approximation line when plotting the moisture absorption amount on the vertical axis and time on the horizontal axis was defined as the water vapor transmission rate W1 (g / hr) per unit time. Also, the water vapor transmission rate W0 (g / hr) was measured in the same manner using filter paper without applying the aqueous composition, and the reduction rate (%) of the water vapor transmission rate was determined from the following formula (1), and the average value with N = 2 was shown in the table. The larger the value of the reduction rate (%) of the water vapor transmission rate, the higher the water vapor barrier property in a low humidity environment. Reduction rate (%) of water vapor transmission rate = {1 - (W1 / W0)} × 100 (1)

[0071] (Environmental responsiveness) The reduction rate of the water vapor transmission rate was measured in the same manner under the conditions of a temperature of 35 °C and a humidity of 80%, and the value calculated from the following formula (2) was defined as the environmental responsiveness. The larger the value, the higher the humidity responsiveness, which means a good result. Environmental responsiveness (%) = (Reduction rate of water vapor transmission rate at 40% humidity) - (Reduction rate of water vapor transmission rate at 80% humidity) (2)

[0072] Production Example 1 (Production of stearoxy PG hydroxyethyl cellulose (C18GE-HEC)) 100 g of hydroxyethyl cellulose (HEC) ("Natrosol HH" manufactured by Ashland) was charged into a 1 L separable flask, and 75.6 g of ion-exchanged water and 450.7 g of isopropyl alcohol were added under a nitrogen gas atmosphere, and the mixture was stirred at 200 rpm for 5 minutes with a stirring blade. 23.6 g of a 48 mass% aqueous sodium hydroxide solution was added thereto and stirred at 40 °C for 30 minutes. Next, 29.6 g of stearyl glycidyl ether was added, and the mixture was stirred at 80 °C for 5 hours for reaction, and then cooled to 50 °C or lower. To this, 21.3 g of a 90% by mass aqueous acetic acid solution was added and stirred for 30 minutes for neutralization. The obtained suspension was evenly placed into two 500 mL centrifuge tubes and centrifuged using a high-speed cooling centrifuge (“CR21G III”, manufactured by Hitachi Koki Co., Ltd.; 1500 g, for 40 seconds). To the supernatant recovered by decantation, the same amount of an 85% by mass aqueous isopropyl alcohol solution was added for redispersion, and then centrifuged again. The operations of redispersion and centrifugation were repeated in the same manner. After the third centrifugation, the precipitate was recovered and dried under reduced pressure at 80 °C overnight using a vacuum dryer. The obtained dried product was pulverized using a pulverizer to obtain powdery C18GE-HEC.

[0073] The water swelling degrees and aspect ratios of component (B) and component (B’) used in this Example and Comparative Examples are shown in Table 1.

Table 1

[0074] Examples 1 to 15, Comparative Examples 1 to 18 (Preparation and Evaluation of Aqueous Compositions) A 3% by mass aqueous solution of component (A) or component (A’), and a 3.5% by mass aqueous dispersion of component (B) or component (B’) were prepared in advance, and the respective components described in the table were mixed according to the following procedure. A homomixer was used as the mixing device. First, the remaining amount of water was added to the 3% by mass aqueous solution of component (A) or component (A’) and stirred, and then the 3.5% by mass aqueous dispersion of component (B) or component (B’) was added and stirred. In Examples 11 to 15, an aqueous solution of component (C) was further added and stirred to obtain a body aqueous composition for each example. Using the obtained compositions, various evaluations were performed by the above method. The results are shown in Table 2 below.

[0075]

Table 2

[0076]

Table 3

[0077]

Table 4

[0078]

Table 5

[0079] The components described in the table are as follows. Also, the compounding amounts (mass %) described in the table are the active ingredient amounts of each component. <Component (A): Nonionic polymer> *1: SEPIGEL 305: manufactured by SEPIC, active ingredient 40% *2: C18GE-HEC: Stearoxy PG hydroxyethyl cellulose obtained in Production Example 1 *3: Polysurf 67CS: manufactured by Ashland

[0080] <Component (A'): Nonionic polymer or anionic polymer other than Component (A)> *4: HEC Daicel SE850: manufactured by Daicel Miraiz Co., Ltd. *5: Methocel 60SH-4000: manufactured by Shin-Etsu Chemical Co., Ltd. *6: Natrosol Plus 330: manufactured by Ashland *7: Kimeroid HV: manufactured by Kimica Corporation *8: Kimica Algin I-3: manufactured by Kimica Corporation *9: Echo Gum: manufactured by Sumitomo Pharma Food & Chemical Co., Ltd.

[0081] <Component (B)> *10: Kunipia G4: manufactured by Kunimine Industries Co., Ltd., average particle size 385 nm *11: Kunipia F: manufactured by Kunimine Industries Co., Ltd., average particle size 338 nm *12: Benge Next Nc: manufactured by Hoejun Corporation, average particle size 759 nm *13: NTS-5: manufactured by Top Industry Co., Ltd., average particle size 580 nm

[0082] <Component (B'): Minerals etc. other than component (B)> *14: Smeton-SA: manufactured by Kunimine Industries Co., Ltd., average particle size 108 nm *15: Smeton-ST: manufactured by Kunimine Industries Co., Ltd., average particle size 77 nm *16: Smeton-SWN: manufactured by Kunimine Industries Co., Ltd., average particle size 127 nm *17: Laponite XLS: manufactured by Rockwood Additives Limited, average particle size 79 nm *18: Kaolin: manufactured by Brenntag Specialties, Inc, average particle size 309 nm *19: Moistnite WO: manufactured by Kunimine Industries Co., Ltd. *20: Smeton-SAN-P: manufactured by Kunimine Industries Co., Ltd. *21: PDM-40L: manufactured by Toppan Industries Co., Ltd., average particle size 1023 nm

[0083] From the above table, it can be seen that the film formed by the aqueous composition for the body of the present invention has both high water vapor barrier properties and environmental responsiveness in a low humidity environment.

Industrial Applicability

[0084] According to the present invention, it is possible to provide an aqueous composition for the body that can form a film that exhibits water vapor barrier properties in a low humidity environment and water vapor release properties in a high humidity environment. The composition has film-forming properties and can be used as various cosmetic compositions.

Claims

Claim 1 A water-based composition for the body, containing (A) a nonionic polymer having a viscosity of 10,000 mPa·s or more at 25°C in a 2 mass% aqueous solution, (B) one or more selected from the group consisting of a water-swellable clay mineral and a water-swellable mica having an aspect ratio of 150 or more, and water, wherein the mass ratio [(A) / (B)] of the component (A) to the component (B) is 0.25 or more and 10 or less, and the storage modulus of the composition measured by dynamic viscoelasticity measurement under the conditions of a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01% is 100 Pa or more and 5,000 Pa or less. A water-based composition for the body. Claim 2 The water-based composition for the body according to Claim 1, wherein the content of the component (A) in the composition is 0.1 mass% or more and 10 mass% or less. Claim 3 The water-based composition for the body according to Claim 1 or 2, wherein the component (A) contains one or more selected from the group consisting of a polymer containing a structural unit derived from N-substituted or unsubstituted (meth)acrylamide and a nonionic polysaccharide. Claim 4 The water-based composition for the body according to Claim 3, wherein the nonionic polysaccharide is a derivative of a nonionic polysaccharide having a substituent containing an alkyl group having 8 or more carbon atoms. Claim 5 A cosmetic composition containing the water-based composition for the body according to Claim 1. Claim 6 A method of using a composition, comprising a step of applying the water-based composition for the body according to Claim 1 or the cosmetic composition according to Claim 5 to a keratin substance to form a film.

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