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) an anionic polymer having a sulfonic acid group or a sulfuric acid group, with a viscosity of 5,000 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, wherein (1) the storage elastic modulus of the composition is 60 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% or wherein (2) the content of component (B) is 0.01 mass% or more and 10 mass% or less and the mass ratio [(A) / (B)] of component (A) to component (B) is 0.2 or more and 20 or less.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 of forming a cosmetic film on the surface of the keratin substance is known. From the viewpoint of achieving both film-forming properties and ease of adaptation to the skin, water-soluble polymers are used in film-forming cosmetics for the skin (see, for example, Patent Documents 1 to 3). Patent Document 1 describes that a solid powder cosmetic containing a powder, an acrylic acid-based polymer, and a water-swellable clay mineral is excellent in dropping strength and also excellent in smooth feel, adhesiveness, etc.

[0003] Patent Document 2 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, etc. Patent Document 3 discloses that an oil-in-water type cosmetic composition for preventing syneresis, which contains a compound that is solubilized by neutralization as an active ingredient, prevents syneresis and exhibits good stability. It is also described that the cosmetic composition contains a gelling agent, water, and a powder component.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, 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 moisture 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, such as when moving from an air-conditioned indoor environment to the outdoors. Therefore, there is a concern that the function of the stratum corneum cannot respond sufficiently to humidity changes, and damage accumulates on the skin.

[0006] Therefore, there is a demand for an external preparation technology that can adjust the moisture content on the skin surface in response to the surrounding environment like the stratum corneum and can suppress skin damage in both low humidity and high humidity environments. Specifically, in a low humidity environment, it exhibits water vapor barrier properties to enhance skin moisturization, and in a high humidity environment, the water vapor barrier properties decrease and it switches to water vapor release properties, forming a film that does not prevent water vapor release from the stratum corneum. It is considered that the above object can be achieved with such an external preparation. In the conventional technology for forming a hydrophobic film, although water vapor barrier properties can be imparted to the skin, environmental responsiveness that can adjust the water vapor barrier properties according to humidity is not exhibited.

[0007] The present invention relates to a topical aqueous composition for the body that can form 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 topical aqueous composition for the body containing one or more selected from the group consisting of a predetermined anionic 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] An aqueous composition for the body, containing (A) an anionic polymer having a sulfonic acid group or a sulfate group, with a viscosity of 5,000 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, An aqueous composition for the body, wherein the storage modulus 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 60 Pa or more and 5,000 Pa or less. [2] (A) An anionic polymer having a sulfonic acid group or a sulfate group, with a viscosity of 5,000 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 content of the component (B) is 0.01 mass% or more and 10 mass% or less, An aqueous composition for the body, wherein the mass ratio [(A) / (B)] of the component (A) to the component (B) is 0.2 or more and 20 or less. [3] A cosmetic composition containing the aqueous composition for the body according to [1] or [2] above. [4] A method of using a composition, which comprises applying the aqueous composition for the body according to [1] or [2] above, or the cosmetic composition according to [3] above, to a keratin substrate to form a film.

Effects of the Invention

[0009] According to the present invention, it is possible to provide an aqueous composition for the body that can form a film exhibiting 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 “aqueous composition for the body” 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 and the like. The “aqueous composition” means a composition mainly composed of water, preferably a composition having a water content of 50% by mass or more. The aqueous composition for the body of the present invention (hereinafter, also simply referred to as “aqueous composition” or “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, nails and the like. As used herein, “containing component X” also includes blending component X.

[0011] In this specification, the water vapor barrier property in a low humidity environment is based on the water vapor barrier property at a relative humidity of 40%, and the water vapor barrier property in a high humidity environment is based on the water vapor barrier property at a relative humidity of 80%. 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”. In addition, 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 considered 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. The environmental responsiveness can be specifically evaluated by the method described in the examples.

[0012] [Aqueous composition for the body] The composition of the present invention (the aqueous composition of the first invention) is a body aqueous composition containing (A) an anionic polymer having a sulfonic acid group or a sulfuric acid group, with a viscosity of 5,000 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 water-swellable mica having an aspect ratio of 150 or more, and water, 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 60 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 water vapor barrier properties in a low humidity environment and water vapor release properties 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 anionic polymer (A) having a sulfonic acid group or a sulfuric acid group has film-forming properties and is a hydrophilic hydrogel. Therefore, it can form a film that changes its properties triggered by moisture absorption and exhibits environmental responsiveness. However, when the anionic polymer is used alone, there is a limit to the improvement of water vapor barrier properties in a low humidity environment. Component (B) is a plate-shaped mineral with a high aspect ratio. When component (B) is added to component (A) to form a film, in the film, the plate-shaped 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" occurs, in which the presence of component (B) lengthens the permeation path of water vapor. The improvement effect of water vapor barrier properties can be obtained by this labyrinth effect. 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, sufficient water vapor barrier properties due to the labyrinth effect cannot be obtained. However, since component (A) is anionic and component (B) is also negatively charged, charge repulsion occurs between component (A) and component (B), and the aggregation of component (B) can be suppressed. Furthermore, since component (B) is water-swellable, it has a high affinity with the aqueous composition, and it is considered that it is difficult to aggregate in the formed film. In addition, when the viscosity of a 2 mass% aqueous solution of component (A) at 25°C is equal to or higher than a predetermined value and the storage elastic modulus of the resulting composition is within a predetermined 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 further improved. Furthermore, since both component (A) and component (B) are hydrophilic, the film containing component (A) and component (B) is sensitive to the ambient 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 maze structure in the film, the water vapor barrier property is not exhibited, and it is considered that the water vapor permeability changes.

[0014] <Component (A): Anionic polymer> Component (A) is an anionic polymer having a sulfonic acid group or a sulfate group and having a viscosity of 5,000 mPa·s or more at 25°C in a 2 mass% aqueous solution, and is preferably an anionic polymer having a sulfonic acid group. Note that at least a part of the sulfonic acid group or the sulfate group may be neutralized and in a salt state. The anionic polymer that is component (A) means a polymer having a sulfonic acid group or a sulfate group as an anionic group and being negatively charged as a whole.

[0015] The viscosity of a 2% by mass aqueous solution of component (A) at 25°C is 5,000 mPa·s or more, preferably 5,500 mPa·s or more, more preferably 6,000 mPa·s or more, still more preferably 10,000 mPa·s or more, even more preferably 30,000 mPa·s or more, even more preferably 50,000 mPa·s or more, even more preferably 70,000 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 200,000 mPa·s or less, more preferably 150,000 mPa·s or less, still more preferably 100,000 mPa·s or less. And the viscosity of a 2% by mass aqueous solution of component (A) at 25°C is 5,000 mPa·s or more, preferably 5,000 mPa·s or more and 200,000 mPa·s or less, more preferably 5,500 mPa·s or more and 150,000 mPa·s or less, still more preferably 6,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 10,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 30,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 50,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 70,000 mPa·s or more and 100,000 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] Component (A) preferably contains at least one selected from the group consisting of (A1) an anionic polysaccharide having a sulfonic acid group or a sulfate group, and (A2) an anionic polymer having a structural unit represented by the following general formula (1), from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness.

Chemical formula

[0017] (Component (A1): Anionic polysaccharide having a sulfonic acid group or a sulfuric acid group) Examples of the anionic polysaccharide as the component (A1) include natural polysaccharides and semi-synthetic polysaccharides derived from natural polysaccharides, and any of these can be used. Examples of the component (A1) which is a natural polysaccharide include carrageenan, chondroitin sulfate, keratan sulfate, dermatan sulfate, heparin, heparan sulfate, and salts thereof. The component (A1) which is a semi-synthetic polysaccharide is preferably a cellulose derivative or a starch derivative having a sulfonic acid group or a sulfuric acid group, more preferably a cellulose derivative having a sulfonic acid group or a sulfuric acid group, and still more preferably a cellulose derivative having a sulfonic acid group. Examples of the cellulose derivative having a sulfonic acid group include cellulose derivatives having a sulfonic acid group and a hydrophobic group having 8 to 24 carbon atoms, preferably 12 to 22 carbon atoms, more preferably 18 to 22 carbon atoms, and more preferably cellulose derivatives having a sulfonic acid group and an alkyl group having 8 to 24 carbon atoms, preferably 12 to 22 carbon atoms, more preferably 18 to 22 carbon atoms. Specific examples thereof include stearoxy PG hydroxyethylcellulose sulfonic acid or a salt thereof. Examples of the starch derivative having a sulfonic acid group or a sulfuric acid group include sulfated starch or a salt thereof. When the component (A1) is a salt, examples of the salt include alkali metal salts such as sodium salt and potassium salt, ammonium salts, etc., and from the viewpoint of availability, an alkali metal salt is preferably used.

[0018] Among these, 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 (A1) is preferably a semi-synthetic polysaccharide, more preferably a cellulose derivative having a sulfonic acid group or a sulfate group, still more preferably a cellulose derivative having a sulfonic acid group and a hydrophobic group having 8 to 24 carbon atoms, even more preferably a cellulose derivative having a sulfonic acid group and a hydrophobic group having 8 to 24 carbon atoms, even more preferably at least one selected from the group consisting of stearoxy PG hydroxyethyl cellulose sulfonic acid or a salt thereof, and even more preferably sodium stearoxy PG hydroxyethyl cellulose sulfonate.

[0019] (Component (A2): Anionic polymer having a structural unit represented by general formula (1)) Component (A2) is an anionic polymer having a structural unit represented by the following general formula (1). [Chemical formula] In formula (1), R 1 is a hydrogen atom or a methyl group, and M is a hydrogen atom, an alkali metal, or ammonium.

[0020] R in general formula (1) 1 is preferably a hydrogen atom from the viewpoint of availability, and M is preferably an alkali metal or ammonium, more preferably sodium or ammonium.

[0021] Component (A2) may be a polymer containing other structural units in addition to the structural units represented by the general formula (1). Examples of such other structural units include structural units derived from vinyl pyrrolidone, (meth)acrylic acid or its salts, alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, acrylamides such as N,N-dimethylacrylamide, and the like. In this specification, “(meth)acrylic acid” means acrylic acid or methacrylic acid, and “(meth)acrylate” means acrylate or methacrylate. Component (A2) may also be a cross-polymer.

[0022] Specific examples of component (A2) include sodium polyacryloyldimethyltaurine, ammonium polyacryloyldimethyltaurine, (sodium acrylate / sodium acryloyldimethyltaurine) copolymer, (2-hydroxyethyl acrylate / sodium acryloyldimethyltaurine) copolymer, (ammonium acryloyldimethyltaurine / VP) copolymer, polyacrylate cross-polymer-6 (ammonium acryloyldimethyltaurine, dimethylacrylamide, lauryl methacrylate and laureth-4 methacrylate), (ammonium acryloyldimethyltaurine / beheneth-25 methacrylate) cross-polymer, and the like. One or more of these can be used. Among these, from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, improvement of environmental responsiveness, and availability, preferably one or more selected from the group consisting of sodium polyacryloyldimethyltaurine, (sodium acrylate / sodium acryloyldimethyltaurine) copolymer, (2-hydroxyethyl acrylate / sodium acryloyldimethyltaurine) copolymer, (ammonium acryloyldimethyltaurine / VP) copolymer, and polyacrylate cross-polymer-6.

[0023] Component (A) is preferably at least one selected from the group consisting of sodium polyacryloyldimethyltaurine, sodium stearoxy PG hydroxyethyl cellulose sulfonate, (sodium acrylate / sodium acryloyldimethyltaurine) copolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurine) copolymer, (ammonium acryloyldimethyltaurine / VP) copolymer, and polyacrylate crosspolymer-6 from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, improvement of environmental responsiveness, and availability.

[0024] As component (A), a commercially available anionic polymer can also be used. Specific examples thereof include "SPS-S-SA" (sodium stearoxy PG hydroxyethyl cellulose sulfonate) manufactured by Kao Corporation, "Simulgel EG QD" ((sodium acrylate / sodium acryloyldimethyltaurine) copolymer), "SEPINOV EMT10", "Sepiplus S", "Simulgel FL", "Simulgel NS" (above, (hydroxyethyl acrylate / sodium acryloyldimethyltaurine) copolymer), "Sepimax zen" (polyacrylate crosspolymer-6) manufactured by SEPPIC, "Aristoflex AVC" ((ammonium acryloyldimethyltaurine / VP) copolymer) manufactured by Clariant Japan Co., Ltd., "Aristoflex Silk" ((sodium polyacryloyldimethyltaurine)), "Aristoflex HMB" ((ammonium acryloyldimethyltaurine / beheneth-25 methacrylate) crosspolymer), etc. manufactured by Clariant Japan Co., Ltd.

[0025] <Component (B): Water-swellable clay mineral 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 and water-swellable micas 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).

[0026] 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.

[0027] 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 2000 or less, more preferably 150 or more and 1000 or less, still more preferably 160 or more and 600 or less, even 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.

[0028] From the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness, 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 is preferably 2000 nm or less, more preferably 1500 nm or less, still more preferably 1000 nm or less. 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 dynamic light scattering method (DLS).

[0029] Component (B) is water-swellable and is one or more selected from the group consisting of clay minerals and mica with an aspect ratio of 150 or more. Hereinafter, clay minerals and mica may be collectively referred to as "minerals". The above water-swellable clay mineral has cations (Na + , K + , Mg 2+ , Ca 2+ etc.) between layers and swells 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.

[0030] 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.

[0031] 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.

[0032] Commercially available products can also be used as component (B). Specific examples thereof include "Kunipia G4", "Kunipia F" (both are purified bentonite (montmorillonite)) manufactured by Kunimine Industries Co., Ltd., "Bengel HV", "Bengel Next Nc" (both are bentonite) manufactured by Hoojun Co., Ltd., "NTS-5" (sodium tetrasilicate mica) manufactured by Toppan Industries Co., Ltd., and the like.

[0033] <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 1.0% by mass or more, and even more preferably 1.2% by mass or more from the viewpoints of film-forming property and improving environmental responsiveness. Also, from the viewpoints of improving the 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 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.

[0034] 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, and even more preferably 0.2% by mass or more from the viewpoints of film-forming property and improvement of water vapor barrier property in a low-humidity environment. Also, 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, even more preferably 3.0% by mass or less, and even more preferably 2.0% 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 0.1% by mass or more and 3.0% by mass or less, and even more preferably 0.2% by mass or more and 2.0% by mass or less.

[0035] The mass ratio [(A) / (B)] of component (A) to component (B) in the composition is preferably 0.2 or more, more preferably 0.3 or more, still more preferably 0.5 or more, even 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 and improvement of environmental responsiveness. Also, from the viewpoint of improvement of water vapor barrier property in a low-humidity environment, it is preferably 20 or less, more preferably 18 or less, still more preferably 15 or less, even more preferably 12 or less, and even more preferably 10 or less. And the mass ratio [(A) / (B)] of component (A) to component (B) in the composition is preferably 0.2 or more and 20 or less, more preferably 0.3 or more and 20 or less, still more preferably 0.5 or more and 18 or less, even more preferably 0.8 or more and 18 or less, even more preferably 1.0 or more and 15 or less, and even more preferably 1.5 or more and 10 or less.

[0036] From the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness, 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. Further, 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.

[0037] <Component (C): Cationic polymer> From the viewpoint of improving the water resistance of the formed film, the composition of the present invention can further contain (C) a cationic polymer. Component (C) is a polymer capable of forming a polyion complex by interaction with component (A). A film containing a polyion complex has a crosslinked structure and is hydrophobic, so that a film with high water resistance can be formed. The cationic polymer as component (C) is preferably a polymer having a cationic group and positively charged as a total charge. However, component (C) may have an anionic group, a nonionic group, or an amphoteric group such as a betaine group in addition to the cationic group as long as the effects of the present invention are not inhibited.

[0038] From the viewpoint of improving the water resistance of the formed film, component (C) is preferably at least one cationic polymer selected from the group consisting of (C1) a cationic polymer containing a structural unit represented by the following general formula (2), and (C2) a cationized polysaccharide.

Chemical formula

[0039] (Component (C1)) Component (C1) is a cationic polymer containing a structural unit represented by the general formula (2). R in the general formula (2) 11 is preferably a methyl group, and R 12 ~R 14 are each independently preferably an alkyl group having 1 to 3 carbon atoms, more preferably a methyl group or an ethyl group, and still more preferably a methyl group. X in the general formula (2) is preferably -O-, and m is preferably from 1 to 3, more preferably from 2 to 3.

[0040] Examples of the structural unit represented by the general formula (2) include one or more selected from the group consisting of a structural unit derived from methacryloylethyltrimethylammonium salt, a structural unit derived from diethyl sulfate of N,N-dimethylaminoethyl methacrylate, and a structural unit derived from methacrylamidopropyltrimethylammonium salt. Preferably, it is one or more selected from the group consisting of a structural unit derived from methacryloylethyltrimethylammonium salt and a structural unit derived from diethyl sulfate of N,N-dimethylaminoethyl methacrylate.

[0041] In component (C1), from the viewpoint of improving the water resistance of the formed film, the content of the structural unit represented by the general formula (2) is preferably 8.0 mol% or more and 100 mol% or less in all the structural units constituting component (C1).

[0042] Component (C1) may be a polymer containing other structural units in addition to the structural unit represented by the general formula (2). Examples of such other structural units include structural units derived from vinyl monomers such as vinyl pyrrolidone, amphoteric monomers such as (meth)acryloyloxyethyl dimethyl betaine, alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, acrylamides such as N,N-dimethylacrylamide, and the like. Component (C1) may also be a cross-polymer cross-linked with polyethylene glycol di(meth)acrylate or the like.

[0043] Preferable specific examples of the cationic polymer containing the structural unit represented by the general formula (2) include methacryloyloxyethyl trimethylammonium chloride polymer (polyquaternium-37), methacryloyloxyethyl dimethyl betaine·methacryloyloxyethyl trimethylammonium chloride·methacrylic acid methoxypolyethylene glycol copolymer (polyquaternium-49), methacryloyloxyethyl dimethyl betaine·methacryloyloxyethyl trimethylammonium chloride·2-hydroxyethyl methacrylate copolymer (polyquaternium-48), and N,N-dimethylaminoethyl methacrylate diethyl sulfate·N,N-dimethylacrylamide·polyethylene glycol dimethacrylate copolymer (polyquaternium-52). One or more selected from the group consisting of these are mentioned. Among these, from the viewpoint of improving the water resistance of the formed film, preferably one or more selected from the group consisting of methacryloyloxyethyl trimethylammonium chloride polymer (polyquaternium-37) and N,N-dimethylaminoethyl methacrylate diethyl sulfate·N,N-dimethylacrylamide·polyethylene glycol dimethacrylate copolymer (polyquaternium-52).

[0044] As the component (C1), a commercially available polymer can also be used. Specific examples thereof include "Soft Care KG-101W-E" (polyquaternium-52), "Soft Care KG-301W" (polyquaternium-52), "Polymer KG30" (polyquaternium-52), "KP Polymer E" (polyquaternium-37) manufactured by Kao Corporation, and "Cosmedia Ultragel 300" (polyquaternium-37) manufactured by BASF Japan Ltd. etc.

[0045] (Component (C2)) Component (C2) is a cationized polysaccharide. In this specification, "cationized polysaccharide" refers to a modified polysaccharide in which a cationic group is introduced into the polymer backbone of the polysaccharide. Specific examples of the cationized polysaccharide include cationized galactomannans such as cationized guar gum, cationized tara gum, cationized fenugreek gum, cationized locust bean gum; cationized polymers having a cellulose backbone such as cationized cellulose, cationized hydroxyethyl cellulose, cationized hydroxypropyl cellulose, cationized carboxymethyl cellulose; cationized starch; etc. Among these, from the viewpoint of improving the water resistance of the formed film, the cationized polysaccharide is preferably at least one selected from the group consisting of cationized galactomannans and cationized polymers having a cellulose backbone, more preferably a cationized polymer having a cellulose backbone, still more preferably cationized hydroxyethyl cellulose, and even more preferably hydroxyethyl cellulose hydroxypropyltrimethylammonium chloride ether (alias: o-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride, polyquaternium-10).

[0046] As the component (C2), a commercially available polymer can also be used. Specific examples thereof include cationized guar gums of the "Jaguar C" series manufactured by Solvay and the "Labool Gum" series manufactured by DSP Gohokyo Chemical Co., Ltd.; cationized celluloses of the "Pois C" series manufactured by Kao Corporation and the "Katinar" series manufactured by Toho Chemical Industry Co., Ltd., and the like.

[0047] From the viewpoint of improving the water resistance of the formed film, the component (C) is preferably at least one selected from the group consisting of methacryloyl ethyl trimethylammonium chloride polymer (polyquaternium-37), N,N-dimethylaminoethyl methacrylate diethyl sulfate·N,N-dimethylacrylamide· polyethylene glycol dimethacrylate copolymer (polyquaternium-52), and hydroxyethyl cellulose hydroxypropyl trimethylammonium chloride ether (polyquaternium-10).

[0048] When the composition contains the component (C), the content of the component (C) in the composition is preferably 0.02% 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, from the viewpoint of improving the water resistance of the formed film. Also, from the viewpoint of improving the blending stability, 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, even more preferably 2.0% by mass or less, even more preferably 1.0% by mass or less, even more preferably 0.5% by mass or less. And the content of the component (C) in the composition is preferably 0.02% 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 2.0% by mass or less, even more preferably 0.2% by mass or more and 1.0% by mass or less, even more preferably 0.2% by mass or more and 0.5% by mass or less.

[0049] From the perspective of improving the water resistance of the formed film, the total content of component (A) and component (C) 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 1.0% by mass or more, even more preferably 1.2% by mass or more, and even more preferably 1.5% by mass or more. Also, from the perspective of improving the blending stability, it is preferably 15% by mass or less, more preferably 10% by mass or less, still more preferably 5.0% by mass or less, and even more preferably 3.5% by mass or less. And the total content of component (A) and component (C) in the composition is preferably 0.1% by mass or more and 15% 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 5.0% by mass or less, even more preferably 0.5% 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, even more preferably 1.2% by mass or more and 3.5% by mass or less, and even more preferably 1.5% by mass or more and 3.5% by mass or less.

[0050] From the perspective of improving the water resistance of the formed film, the mass ratio [(A)+(C) / (B)] of the total amount of component (A) and component (C) to component (B) in the composition is preferably 0.5 or more, more preferably 1.0 or more, and still more preferably 1.5 or more. From the perspective of improving the blending stability, it is preferably 10.0 or less, more preferably 5.0 or less, and still more preferably 3.0 or less. And the mass ratio [(A)+(C) / (B)] is preferably 0.5 or more and 10.0 or less, more preferably 1.0 or more and 5.0 or less, and still more preferably 1.5 or more and 3.0 or less.

[0051] <Component (D): Glycerin or its condensate> From the perspectives of improving the blending stability, improving the water vapor barrier property in a low-humidity environment, and improving the environmental responsiveness, the composition of the present invention can further contain glycerin or its condensate as component (D). Examples of glycerin or its condensate include glycerin, diglycerin, polyglycerin, etc., and one or more of these can be used. Glycerin or its condensate is, among the above, preferably at least one selected from the group consisting of glycerin and diglycerin, and more preferably glycerin.

[0052] When the composition of the present invention contains component (D), the content of component (D) 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 blending stability, improving water vapor barrier properties in a low humidity environment, and improving environmental responsiveness. Also, from the viewpoint of improving 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 (D) 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.

[0053] <Component (E): Nonionic polymer> The composition of the present invention can further contain a nonionic polymer as component (E) from the viewpoints of improving water vapor barrier properties in a low humidity environment, improving environmental responsiveness, and stability when preparing a cosmetic composition by blending a surfactant, an oily component, etc. into the composition of the present invention. In this specification, the "nonionic polymer" means a polymer that substantially does not have a cationic group, an anionic group, and an amphoteric group, which are ionic groups.

[0054] Component (E) is preferably a nonionic polymer having a viscosity of 1,500 mPa·s or more at 25°C in a 2% by mass aqueous solution from the viewpoints of improving water vapor barrier properties in a low humidity environment and improving environmental responsiveness. The viscosity at 25°C of a 2% by mass aqueous solution of component (E) is more preferably 5,000 mPa·s or more, still more preferably 10,000 mPa·s or more, even more preferably 15,000 mPa·s or more, and even 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, and even more preferably 150,000 mPa·s or less. And the viscosity at 25°C of a 2% by mass aqueous solution of component (E) is preferably 1,500 mPa·s or more, more preferably 1,500 mPa·s or more and 1,000,000 mPa·s or less, still more preferably 5,000 mPa·s or more and 800,000 mPa·s or less, even more preferably 10,000 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, and 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 (E) can be measured by the method described in the examples.

[0055] Examples of component (E) include polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide, polymers containing structural units derived from (meth)acrylate, 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.

[0056] Examples of polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide include homopolymers of N-substituted or unsubstituted (meth)acrylamide, copolymers of N-substituted (meth)acrylamide and N-unsubstituted (meth)acrylamide, and copolymers of N-substituted or unsubstituted (meth)acrylamide and nonionic monomers such as (meth)acrylate esters, vinyl pyrrolidone, vinyl acetate, and vinyl methyl ether. Examples of N-substituted (meth)acrylamide include dialkyl (meth)acrylamides such as dimethyl (meth)acrylamide and diethyl (meth)acrylamide. Examples of N-unsubstituted (meth)acrylamide include acrylamide and methacrylamide.

[0057] Examples of (meth)acrylate esters include alkyl (meth)acrylate esters, hydroxyalkyl (meth)acrylate esters, and alkyl ether (meth)acrylate esters.

[0058] 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, (vinyl pyrrolidone / (meth)acrylamide) copolymer, ((meth)acrylamide / alkyl acrylate ester) copolymer, (dimethylacrylamide / alkyl acrylate ester) 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 contains polyacrylamide.

[0059] Examples of the polymer containing a structural unit derived from a (meth)acrylic acid ester include a homopolymer of a (meth)acrylic acid ester and a copolymer of a (meth)acrylic acid ester and a nonionic monomer such as vinylpyrrolidone, vinyl acetate, or vinyl methyl ether. Examples of the (meth)acrylic acid ester include an alkyl (meth)acrylate, a hydroxyalkyl (meth)acrylate, and an alkyl ether (meth)acrylate. Note that the polymer containing a structural unit derived from a (meth)acrylic acid ester excludes a polymer containing a structural unit derived from an N-substituted or unsubstituted (meth)acrylamide. Specific examples of the polymer containing a structural unit derived from a (meth)acrylic acid ester include a (vinylpyrrolidone / alkyl acrylate) copolymer and a (hydroxyethyl acrylate / methoxyethyl acrylate) copolymer.

[0060] Examples of the nonionic polysaccharide include nonionic polysaccharides such as starch, cellulose, guar gum, tara gum, locust bean gum, and glucomannan, and derivatives thereof. 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 nonionic polysaccharide preferably includes a derivative of a nonionic polysaccharide, more preferably includes a derivative of a nonionic polysaccharide 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.

[0061] 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, it is preferably at least one 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.

[0062] As the alkyl group having 8 or more carbon atoms, an alkyl group having 8 to 22 carbon atoms is preferable, an alkyl group having 12 to 22 carbon atoms is more preferable, an alkyl group having 16 to 22 carbon atoms is still more preferable, and an alkyl group having 18 to 22 carbon atoms is even more preferable. 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, palmityl group, heptadecyl group, stearyl group, isostearyl group, nonadecyl group, icosyl group, heneicosyl group, and behenyl group, etc. Among the above, 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, heneicosyl group, and behenyl group; more preferably at least one selected from the group consisting of cetyl group, stearyl group, isostearyl group, icosyl group, heneicosyl group, and behenyl group; still more preferably at least one selected from the group consisting of stearyl group and behenyl group.

[0063] In the derivative of 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 at least one selected from the group consisting of an alkyl group, a hydroxyalkyl group, and a dihydroxyalkyl group having 3 or less carbon atoms is substituted in an unsubstituted nonionic polysaccharide. Also, the parent nonionic polysaccharide is preferably a compound having a cellulose skeleton. That is, the above-mentioned "unsubstituted nonionic polysaccharide" is preferably cellulose.

[0064] Examples of the compound having a cellulose skeleton, which is the nonionic polysaccharide serving as the matrix, include alkyl celluloses having only an alkyl group with 3 or fewer carbon atoms, hydroxyalkyl celluloses having a hydroxyalkyl group or a dihydroxyalkyl group, and hydroxyalkyl-alkyl celluloses having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group with 3 or fewer carbon atoms.

[0065] Specific examples of the alkyl cellulose having only an alkyl group with 3 or fewer carbon atoms include methyl cellulose, ethyl cellulose, propyl cellulose, methyl ethyl cellulose, methyl propyl cellulose, ethyl propyl cellulose, and the like. Specific examples of the hydroxyalkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group include hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, dihydroxypropyl hydroxyethyl cellulose, dihydroxypropyl hydroxypropyl cellulose, and the like. One or more selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, and dihydroxypropyl hydroxyethyl cellulose are preferable. Specific examples of the hydroxyalkyl-alkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group with 3 or fewer 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, and the like.

[0066] A cellulose derivative having a substituent containing an alkyl group with 8 or more carbon atoms is more preferably a compound obtained by introducing a substituent containing an alkyl group with 8 or more carbon atoms into cellulose having the hydroxyalkyl group or dihydroxyalkyl group.

[0067] Specific examples of the compound obtained by introducing a substituent containing an alkyl group with 8 or more carbon atoms into cellulose having a hydroxyalkyl group or dihydroxyalkyl group include cetyl hydroxyethyl cellulose (such as "Polysurf67CS" manufactured by Ashland), and stearoxy PG hydroxyethyl cellulose (display name).

[0068] Component (E) preferably contains at least one selected from the group consisting of a polymer containing a structural unit derived from N-substituted or unsubstituted (meth)acrylamide and a nonionic polysaccharide, from the viewpoints of film-forming property, improvement of water vapor barrier property in a low humidity environment, and improvement of environmental responsiveness. Among these, 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 (E) preferably contains at least one 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 having 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 having 8 or more carbon atoms thereto, and hydroxyalkyl-alkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group having 3 or less carbon atoms, a compound obtained by introducing a substituent containing an alkyl group having 8 or more carbon atoms thereto, still more preferably at least one selected from the group consisting of polyacrylamide, cetyl hydroxyethyl cellulose, and stearoxy PG hydroxyethyl cellulose, and even more preferably at least one selected from the group consisting of polyacrylamide and stearoxy PG hydroxyethyl cellulose.

[0069] When the composition of the present invention contains component (E), the content of component (E) 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 0.7% 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 (E) 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 0.7% 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.

[0070] When the composition of the present invention contains component (E), the mass ratio [(E) / (A)] of component (E) to component (A) in the composition is preferably 0.1 or more, more preferably 0.2 or more, still more preferably 0.3 or more, even more preferably 0.5 or more, and even more preferably 1.0 or more, from the viewpoints of film-forming property and improvement of environmental responsiveness. Further, from the viewpoint of improvement of blending stability, it is preferably 10 or less, more preferably 5.0 or less, still more preferably 3.0 or less, even more preferably 2.0 or less, and even more preferably 1.5 or less. And the mass ratio [(E) / (A)] is preferably 0.1 or more and 10 or less, more preferably 0.2 or more and 5.0 or less, still more preferably 0.3 or more and 3.0 or less, even more preferably 0.5 or more and 2.0 or less, and even more preferably 1.0 or more and 1.5 or less.

[0071] The mass ratio of the total amount of components (A), (C), and (E) to component (B) in the composition of the present invention [{(A)+(C)+(E)} / (B)] is preferably 0.5 or more, more preferably 1.0 or more, still more preferably 1.5 or more, from the viewpoints of film-forming property and improvement of environmental responsiveness, and is preferably 10.0 or less, more preferably 5.0 or less, still more preferably 3.0 or less, from the viewpoints of improvement of water vapor barrier property and improvement of blending stability in a low humidity environment. And the mass ratio [{(A)+(C)} / (B)] is preferably 0.5 or more and 10.0 or less, more preferably 1.0 or more and 5.0 or less, still more preferably 1.5 or more and 3.0 or less.

[0072] <Water> Since the composition of the present invention is an aqueous composition, it contains water. As the water, deionized water or distilled water is preferable. Note that tap water, groundwater, etc. sterilized with hypochlorous acid or the like may be used as long as the stability of the composition is not impaired. 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, even more preferably 85% by mass or more, from the viewpoints of making it an aqueous composition and improvement of blending stability. The water content in the composition may be the balance of components (A) and (B).

[0073] <Storage elastic modulus> The composition of the present invention has a storage elastic modulus 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% of 60 Pa or more and 5,000 Pa 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. 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 80 Pa or more, more preferably 100 Pa or more, and still more preferably 150 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, improvement of water vapor barrier property in a low humidity environment, and coatability, it is preferably 4,000 Pa or less, more preferably 3,500 Pa or less, and still more preferably 3,000 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 60 Pa or more and 5,000 Pa or less, preferably 80 Pa or more and 4,000 Pa or less, more preferably 100 Pa or more and 3,500 Pa or less, and still more preferably 150 Pa or more and 3,000 Pa or less.

[0074] Incidentally, the storage elastic modulus of the composition can be adjusted to the above-mentioned predetermined range by adjusting the types, blending amounts, blending ratios, etc. of the respective components. Further, the storage elastic modulus G' of the composition is a value obtained by measuring the storage elastic modulus G' from a strain of 0.001% to 100% at a temperature of 25° C. and a measurement frequency of 2 Hz using a rheometer (manufactured by Anton Paar, "MCR502").

[0075] The present invention further provides (A) An anionic polymer having a sulfonic acid group or a sulfate group, the viscosity of a 2 mass% aqueous solution of which at 25° C. is 5,000 mPa·s or more, (B) at least one 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 content of the component (B) is 0.01 mass% or more and 10 mass% or less, and a mass ratio [(A) / (B)] of the component (A) to the component (B) is 0.2 or more and 20 or less, and provides a cosmetic aqueous composition. In the following description, the cosmetic aqueous composition is also appropriately referred to as "the aqueous composition of the second invention". The component (A), the component (B), water, and preferred embodiments thereof used in the aqueous composition of the second invention are the same as those described above.

[0076] From the viewpoints of film-forming property and improvement of water vapor barrier property in a low humidity environment, the content of component (B) in the aqueous composition of the second invention is 0.01% by mass or more, preferably 0.05% by mass or more, more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more. Further, from the viewpoints of improvement of environmental responsiveness and improvement of dispersibility of component (B), it is 10% by mass or less, preferably 8.0% by mass or less, more preferably 5.0% by mass or less, still more preferably 3.0% by mass or less, and even more preferably 2.0% by mass or less. And the content of component (B) in the aqueous composition of the second invention is 0.01% by mass or more and 10% by mass or less, preferably 0.05% by mass or more and 8.0% by mass or less, more preferably 0.1% by mass or more and 5.0% by mass or less, still more preferably 0.1% by mass or more and 3.0% by mass or less, and even more preferably 0.2% by mass or more and 2.0% by mass or less.

[0077] From the viewpoints of film-forming property and improvement of environmental responsiveness, the mass ratio [(A) / (B)] of component (A) to component (B) in the aqueous composition of the second invention is 0.2 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. Further, from the viewpoint of improvement of water vapor barrier property in a low humidity environment, it is 20 or less, preferably 18 or less, more preferably 15 or less, still more preferably 12 or less, and even more preferably 10 or less. And the mass ratio [(A) / (B)] of component (A) to component (B) in the composition is 0.2 or more and 20 or less, preferably 0.3 or more and 20 or less, more preferably 0.5 or more and 18 or less, still more preferably 0.8 or more and 18 or less, even more preferably 1.0 or more and 15 or less, and even more preferably 1.5 or more and 10 or less.

[0078] <Component (C): Cationic polymer> From the viewpoint of improving the water resistance of the film to be formed, the aqueous composition of the second invention can further contain (C) a cationic polymer. The type, content, and preferred embodiments thereof are the same as those described above.

[0079] <Component (E): Nonionic polymer> From the perspective of improving the water vapor barrier property in a low humidity environment, improving the environmental responsiveness, and the stability when preparing a cosmetic composition by blending a surfactant, an oily component, etc. into the aqueous composition of the second invention, as component (E), a nonionic polymer can be further contained. The type, content, and preferred embodiments thereof are the same as described above.

[0080] [Method for producing the composition] The method for producing the composition of the present invention (including the aqueous composition of the second invention; the same shall apply hereinafter) is not particularly limited, and each component can be mixed and produced by a known method. When the composition contains (C) a cationic polymer, from the perspective of improving the blending stability and the production efficiency, the method for producing the composition of the present invention preferably has a step of mixing an aqueous dispersion containing component (A) and component (B) with component (C). More specifically, it is more preferable to have a step of preliminarily preparing an aqueous dispersion containing component (A) and component (B), and then mixing the aqueous dispersion with component (C) or a solution thereof. Similarly, when the composition contains (E) a nonionic polymer, from the perspective of improving the blending stability and the production efficiency, the method for producing the composition of the present invention preferably has a step of mixing an aqueous dispersion containing component (A) and component (B) with component (E). More specifically, it is more preferable to have a step of preliminarily preparing an aqueous dispersion containing component (A) and component (B), and then mixing the aqueous dispersion with component (E) or a solution thereof. When the composition contains (C) a cationic polymer and (E) a nonionic polymer, the mixing order of component (C) and component (E) is not particularly limited. 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.

[0081] [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 properties in a low humidity environment and water vapor release properties in a high humidity environment. The cosmetic composition is obtained by mixing the aqueous composition and other components within a range that does not impair the effects of the present invention. Examples of the other components include surfactants, pH adjusters, oils, feel improvers, colorants, antioxidants, anti-dandruff agents, vitamins, bactericides, anti-inflammatory agents, preservatives, chelating agents, humectants, pearl agents, ceramides, plant extracts, ultraviolet absorbers, and the like. 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, even 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.

[0082] <Form of the cosmetic composition> In addition to the aqueous cosmetic composition, the cosmetic composition of the present invention may be in the form of an emulsified cosmetic composition. The emulsified cosmetic composition can be either an oil-in-water type cosmetic composition or a water-in-oil type cosmetic composition, but from the viewpoints of not impairing the effects of the aqueous composition and improving the usability, it is preferably an oil-in-water type emulsified cosmetic composition.

[0083] Examples of the type of the cosmetic composition include skin cosmetic compositions, hair cosmetic compositions, etc., and preferably skin cosmetic compositions. Also, 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 off after being applied to the object to be treated. Among the cosmetic compositions, the product forms of skin cosmetic compositions include makeup cosmetics, sunscreen, makeup bases, lotions, beauty essences, creams, and the like. The product forms of hair cosmetic compositions include hair shampoos, hair rinses, hair conditioners, hair treatments (including those that are not rinsed off), hair styling agents, hair colors, permanent agents, and the like. Among these, from the viewpoint of the effectiveness of the effect of the present invention of having film-forming properties, as the hair cosmetic composition, it is preferably a hair conditioner, a hair treatment, or a hair styling agent.

[0084] [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.

[0085] 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 method for applying the composition include a method of applying, casting, or spraying the composition onto the keratin substance, and preferably a method of applying.

[0086] When the keratin substance is 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 Preferably, it is 0.01 mg or more and 50 mg or less, and more preferably 0.1 mg or more and 30 mg or less.

[0087] When the keratin substance is hair, the application amount of the composition to the hair, 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, is 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, in terms of the bath ratio (mass of the composition / dry mass of the hair to which the composition is applied) with respect to the mass of the hair to which the composition is applied. The hair to which the composition is applied may be all of the hair or a part thereof.

[0088] After applying the composition to the keratin substance, a step of rinsing off the composition may be performed. However, from the viewpoint of the effectiveness of the effect of the present invention of having film-forming properties, it is preferable to perform a drying treatment without performing the step of rinsing off the composition to form a film on the surface of the keratin substance. When the keratin substance is 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 or a dryer.

[0089] Hereinafter, regarding the above-described embodiments, the present invention further discloses the following. <1> (A) An anionic polymer having a sulfonic acid group or a sulfate group, the viscosity of which in a 2 mass% aqueous solution at 25 ° C is 5,000 mPa·s or more, (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, 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 60 Pa or more and 5,000 Pa or less. <2> The viscosity of a 2% by mass aqueous solution of the component (A) at 25°C is preferably 5,000 mPa·s or more and 200,000 mPa·s or less, more preferably 5,500 mPa·s or more and 150,000 mPa·s or less, still more preferably 6,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 10,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 30,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 50,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 70,000 mPa·s or more and 100,000 mPa·s or less, and is the aqueous composition for the body of <1>. <3> The component (A) contains at least one selected from the group consisting of (A1) an anionic polysaccharide having a sulfonic acid group or a sulfuric acid group, and (A2) an anionic polymer having a structural unit represented by the following general formula (1), and is the aqueous composition for the body of <1> or <2>.

Chemical formula

[0090] <11> The aqueous composition for the body according to any one of <1> to <10>, wherein the aspect ratio of the component (B) is preferably 150 or more and 2000 or less, more preferably 150 or more and 1000 or less, still more preferably 160 or more and 600 or less, even more preferably 180 or more and 500 or less, and even more preferably 190 or more and 400 or less. <12> 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, still more preferably 300 nm or more and 1000 nm or less, and is a body aqueous composition of any one of <1> to <11>. <13> The component (B) is preferably at least one selected from the group consisting of water-swellable bentonite, water-swellable montmorillonite, and water-swellable mica, and more preferably at least one selected from the group consisting of water-swellable bentonite, water-swellable montmorillonite, and sodium tetrasilicate mica, and is a body aqueous composition of any one of <1> to <12>. <14> The content of the component (A) in the body aqueous 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 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 is a body aqueous composition of any one of <1> to <13>. <15> The content of the component (B) in the body aqueous 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 0.1% by mass or more and 3.0% by mass or less, and even more preferably 0.2% by mass or more and 2.0% by mass or less, and is a body aqueous composition of any one of <1> to <14>. <16> The mass ratio [(A) / (B)] of the component (A) to the component (B) in the body aqueous composition is preferably 0.2 or more and 20 or less, more preferably 0.3 or more and 20 or less, still more preferably 0.5 or more and 18 or less, even more preferably 0.8 or more and 18 or less, even more preferably 1.0 or more and 15 or less, and even more preferably 1.5 or more and 10 or less, and is a body aqueous composition of any one of <1> to <15>. <17> The total content of component (A) and 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 an aqueous composition for the body according to any one of <1> to <16>. <18> The water content 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 an aqueous composition for the body according to any one of <1> to <17>. <19> Furthermore, it contains (C) a cationic polymer, and is an aqueous composition for the body according to any one of <1> to <18>. <20> The component (C) is preferably at least one cationic polymer selected from the group consisting of (C1) a cationic polymer containing a structural unit represented by the following general formula (2) and (C2) a cationized polysaccharide, and is an aqueous composition for the body according to <19>.

Chemical formula

[0091] <21> The component (C1) is at least one selected from the group consisting of methacryloyl ethyl trimethyl ammonium chloride polymer (polyquaternium-37), methacryloyl ethyl dimethyl betaine·methacryloyl ethyl trimethyl ammonium chloride·methacrylic acid methoxypolyethylene glycol copolymer (polyquaternium-49), methacryloyl ethyl dimethyl betaine·methacryloyl ethyl trimethyl ammonium chloride·2-hydroxyethyl methacrylate copolymer (polyquaternium-48), and N,N-dimethylaminoethyl methacrylate diethyl sulfate·N,N-dimethylacrylamide·dimethacrylic acid polyethylene glycol copolymer (polyquaternium-52), preferably at least one selected from the group consisting of methacryloyl ethyl trimethyl ammonium chloride polymer (polyquaternium-37) and N,N-dimethylaminoethyl methacrylate diethyl sulfate·N,N-dimethylacrylamide·dimethacrylic acid polyethylene glycol copolymer (polyquaternium-52), the aqueous composition for the body of <20>. <22> The component (C2) is preferably at least one selected from the group consisting of cationized galactomannan and a cationized polymer having a cellulose skeleton, more preferably a cationized polymer having a cellulose skeleton, still more preferably cationized hydroxyethyl cellulose, and even more preferably hydroxyethyl cellulose hydroxypropyl trimethyl ammonium chloride ether (polyquaternium-10), the aqueous composition for the body of <20> or <21>. <23> The component (C) is preferably at least one selected from the group consisting of methacryloyl ethyl trimethyl ammonium chloride polymer (polyquaternium-37), N,N-dimethylaminoethyl methacrylate diethyl sulfate·N,N-dimethylacrylamide·dimethacrylic acid polyethylene glycol copolymer (polyquaternium-52), and hydroxyethyl cellulose hydroxypropyl trimethyl ammonium chloride ether (polyquaternium-10), the aqueous composition for the body of any one of <19> to <22>. <24> The content of component (C) in the aqueous composition for the body is preferably 0.02% 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 2.0% by mass or less, even more preferably 0.2% by mass or more and 1.0% by mass or less, even more preferably 0.2% by mass or more and 0.5% by mass or less, which is an aqueous composition for the body according to any one of <19> to <23>. <25> The total content of component (A) and component (C) in the aqueous composition for the body is preferably 0.1% by mass or more and 15% 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 5.0% by mass or less, even more preferably 0.5% 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, even more preferably 1.2% by mass or more and 3.5% by mass or less, even more preferably 1.5% by mass or more and 3.5% by mass or less, which is an aqueous composition for the body according to any one of <19> to <24>. <26> The mass ratio [{(A)+(C)} / (B)] of the total amount of component (A) and component (C) to component (B) in the aqueous composition for the body is preferably 0.5 or more and 10.0 or less, more preferably 1.0 or more and 5.0 or less, still more preferably 1.5 or more and 3.0 or less, which is an aqueous composition for the body according to any one of <19> to <25>. <27> Furthermore, as component (D), an aqueous composition for the body according to any one of <1> to <26> contains glycerin or a condensate thereof. <28> The component (D) is preferably at least one selected from the group consisting of glycerin and diglycerin, more preferably glycerin, which is an aqueous composition for the body according to <27>. <29> The content of component (D) 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 <27> or <28>. <30> Furthermore, it contains (E) a nonionic polymer, which is the aqueous composition for the body of any one of <1> to <29>. <31> The viscosity of the 2% aqueous solution of the component (E) at 25°C is preferably 1,500 mPa·s or more, more preferably 1,500 mPa·s or more and 1,000,000 mPa·s or less, still more preferably 5,000 mPa·s or more and 800,000 mPa·s or less, even more preferably 10,000 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, and even more preferably 20,000 mPa·s or more and 150,000 mPa·s or less, which is the aqueous composition for the body of <30>. <32> The component (E) includes one or more selected from the group consisting of polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide, polymers containing structural units derived from (meth)acrylate esters, 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 thereto, 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, and is a <30> or <31> aqueous composition for the body. <33> The content of the component (E) 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 0.7% 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, even more preferably 1.2% by mass or more and 3.0% by mass or less, and is an aqueous composition for the body of any one of <30> to <32>. <34> The mass ratio [(E) / (A)] of component (E) to component (A) in the aqueous composition for the body is preferably 0.1 or more and 10 or less, more preferably 0.2 or more and 5.0 or less, still more preferably 0.3 or more and 3.0 or less, even more preferably 0.5 or more and 2.0 or less, and even more preferably 1.0 or more and 1.5 or less. The aqueous composition for the body is any one of <30> to <33>. <35> The mass ratio [{(A)+(C)+(E)} / (B)] of the total amount of components (A), (C) and (E) to component (B) in the aqueous composition for the body is preferably 0.5 or more and 10.0 or less, more preferably 1.0 or more and 5.0 or less, still more preferably 1.5 or more and 3.0 or less. The aqueous composition for the body is any one of <30> to <34>. <36> The storage 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 80 Pa or more and 4,000 Pa or less, more preferably 100 Pa or more and 3,500 Pa or less, still more preferably 150 Pa or more and 3,000 Pa or less. The aqueous composition for the body is any one of <1> to <35>.

[0092] <37> (A) An anionic polymer having a sulfonic acid group or a sulfate group, with a viscosity of 5,000 mPa·s or more at 25°C in a 2 mass% aqueous solution, (B) one or more selected from the group consisting of water-swellable clay minerals and water-swellable mica having an aspect ratio of 150 or more, and water are contained. The content of the component (B) is 0.01 mass% or more and 10 mass% or less. The mass ratio [(A) / (B)] of the component (A) to the component (B) is 0.2 or more and 20 or less. The aqueous composition for the body. <38> The content of the component (B) in the aqueous composition for the body is preferably 0.05 mass% or more and 8.0 mass% or less, more preferably 0.1 mass% or more and 5.0 mass% or less, still more preferably 0.1 mass% or more and 3.0 mass% or less, even more preferably 0.2 mass% or more and 2.0 mass% or less. The aqueous composition for the body is of <37>. <39> The mass ratio [(A) / (B)] of component (A) to component (B) in the aqueous composition for the body is preferably 0.3 or more and 20 or less, more preferably 0.5 or more and 18 or less, still more preferably 0.8 or more and 18 or less, even more preferably 1.0 or more and 15 or less, and even more preferably 1.5 or more and 10 or less, and is an aqueous composition for the body of <37> or <38>. <40> A cosmetic composition containing any one aqueous composition for the body of <1> to <39>. <41> 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, even more preferably 90% by mass or more, and is 100% by mass or less, and is a cosmetic composition of <40>. <42> The cosmetic composition is a skin cosmetic composition or a hair cosmetic composition, and is preferably a skin cosmetic composition, and is a cosmetic composition of <40> or <41>. <43> 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, and is a cosmetic composition of any one of <40> to <42>. <44> A method for using a composition, which comprises a step of applying any one aqueous composition for the body of <1> to <39> or any one cosmetic composition of <40> to <43> to a keratin substance to form a film. <45> The keratin substance is preferably skin or hair, and more preferably skin, and is a method of use of <44>.

Examples

[0093] Hereinafter, the present invention will be described by way of 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.

[0094] (Measurement of the viscosity of a 2% by mass aqueous solution of an anionic polymer and a nonionic polymer) An aqueous solution containing 2% by mass of each of the anionic polymer (Component (A) or Component (A')) and the nonionic polymer (Component (E)) 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, an anionic polymer other than Component (A) is 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.

[0095] (Measurement of aspect ratio of Component (B) or Component (B')) The aspect ratio of Component (B) or Component (B') described in the table was determined according to the method described in Clay Science, Vol. 50, No. 3, 162-174 (2012). In this example, minerals other than Component (B) are denoted as "Component (B')". For ion-exchanged water and aqueous dispersions of Component (B) or Component (B') with concentrations of 0.5% by mass, 0.25% by mass, and 0.1% by mass, using a rheometer ("MCR502" manufactured by Anton Paar), at 25°C, shear rate 100 s -1 The viscosity was measured. Using the viscosity of the obtained aqueous dispersion, the viscosity of water, and the volume ratio of Component (B) or Component (B'), the reduced viscosity of the aqueous dispersion of Component (B) or Component (B') at each concentration was determined. 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

[0096] 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 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 2N NaCl aqueous solution to remove all the interlayer cations of the clay mineral. + The supernatant was removed by centrifugation again, and the mixture was washed three times with 70% isopropyl alcohol. After filtering through a membrane filter (Omnipore Membrane Filters 1.0 μm JA), the clay mineral cake was naturally dried and crushed in a mortar before being used for measurement.

[0097] Furthermore, for clay minerals (Laponite XLS, kaolin, PDM-40L) whose aqueous dispersions have viscosities that are almost the same as water, it was not possible to create a regression line using the above method. This means that the aspect ratio is extremely small, and it was determined that the aspect ratio was 10 or less. Furthermore, the aspect ratio of organically modified clays (Moistnite WO, Sumecton SAN-P), which are not compatible with water, could not be measured using the above method.

[0098] (Measurement of Water Swelling Degree of Component (B) or Component (B')) 100 mL of ion-exchanged water was placed in a 100 mL graduated cylinder. 2 g of component (B) or component (B’) was added little by little to this 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 X (mL / 2 g) of component (B) or component (B’) after 24 hours had elapsed was read from the scale. The test was conducted 3 times, and the average value was shown in a table as “water swelling degree (mL / 2 g)”. Note that for those that do not readily dissolve in water, such as organically modified clays (Moistnite WO, Smeton SAN-P), the water swelling degree could not be measured.

[0099] (Measurement of storage elastic modulus G’ of the composition) Dynamic viscoelasticity measurement was performed on the aqueous body compositions of each example. Using a rheometer (Anton Paar's “MCR502”), the storage elastic modulus G’ was measured at a temperature of 25°C and a measurement frequency of 2 Hz from a strain of 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.

[0100] (Measurement of water vapor barrier property (humidity 40%)) 1 g of the aqueous body composition of each example was applied to filter paper (ADVANTEC, No. 1, Φ70 mm) and dried overnight. 20 g of silica was placed in a moisture permeation test cup (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's “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. When plotting the moisture absorption on the vertical axis and time on the horizontal axis, the slope of the linear approximation line 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 the application of 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)

[0101] (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 better result. In this example, 40% or more is preferably used. Environmental responsiveness (%) = (Reduction rate of water vapor transmission rate at 40% humidity) - (Reduction rate of water vapor transmission rate at 80% humidity) (2)

[0102] (Evaluation of film water resistance) 0.5 g of the aqueous composition for the body in each example was applied to a Teflon (registered trademark) sheet and dried overnight to obtain a dry film. The obtained dry film was floated in the water in a petri dish containing ion-exchanged water and allowed to stand for 12 hours. After standing, those in which the film did not dissolve and maintained its shape were evaluated as A, and those in which at least a part of the film dissolved were evaluated as B and shown in the table.

[0103] The water swelling degree and aspect ratio of component (B) and component (B') used in this example and the comparative example are shown in Table 1.

Table 1

[0104] Examples 1 to 36, Comparative Examples 1 to 17 (Preparation and evaluation of aqueous compositions) A 3% by mass aqueous solution of component (A) or component (A’), a 3.5% by mass aqueous dispersion of component (B) or component (B’), a 5% by mass aqueous solution of component (C), and a 3% by mass aqueous solution of component (E) were prepared in advance, and each component described in the table was mixed according to the following procedure. A disperser was used as the mixing device. First, the remaining amount of water (chloroform in Comparative Examples 16 to 17) 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 17 to 18, 20 to 21, and 24 to 25, glycerin was further added. Then, in Examples 18 to 25, the aqueous solution of component (C) was further added, and in Examples 26 to 36, the aqueous solution of component (E) was added and stirred to obtain the aqueous composition for the body in each example. Using the obtained composition, various evaluations were performed by the above method. The results are shown in Table 2 below.

[0105]

Table 2

[0106]

Table 3

[0107]

Table 4

[0108]

Table 5

[0109]

Table 6

[0110]

Table 7

[0111] The components listed in the table are as follows. The compounding amounts (mass %) listed in the table are the active ingredient amounts of each component. <Component (A): Anionic polymer> *1: SPS-S-SA: Manufactured by Kao Corporation, active ingredient 100% *2: Simulgel EG QD: Manufactured by SEPIC, active ingredient 37.5% *3: SEPINOV EMT10: Manufactured by SEPIC, active ingredient 89.3% *4: Sepiplus S: Manufactured by SEPIC, active ingredient 61% *5: Simulgel FL: Manufactured by SEPIC, active ingredient 38% *6: Simulgel NS: Manufactured by SEPIC, active ingredient 37% *7: Sepimax zen: Manufactured by SEPIC, active ingredient 95% *8: Aristoflex AVC: Manufactured by Clariant Japan K.K.

[0112] <Component (A'): Anionic polymer other than component (A)> *9: Carrageenin SC-67(N): Manufactured by San-Ei Gen F.F.I., Inc. *10: Polyvinylsulfonic acid: Manufactured by Polysciences, Inc., active ingredient 25% *11: Julimer AC-10SH: Manufactured by Toagosei Co., Ltd., active ingredient 40% *12: Kimica Algin I-3: Manufactured by Kimica Corporation *13: Echo Gum: Manufactured by Sumitomo Pharma Food & Chemical Co., Ltd. *14: Ingeo 3001D: Manufactured by Nature Works

[0113] <Component (B)> *15: Kunipia G4: Manufactured by Kunimine Industries Co., Ltd., average particle size 385 nm *16: Kunipia F: Manufactured by Kunimine Industries Co., Ltd., average particle size 338 nm *17: Bengel HV: Manufactured by Hoojun Corporation, average particle size 464 nm *18: Bengel Next Nc: Manufactured by Hoojun Corporation, average particle size 759 nm *19: NTS-5, manufactured by Toppy Industries, Ltd., average particle size 580 nm

[0114] <Component (B'): Minerals etc. other than component (B)> *20: Smeton-SA, manufactured by Kunimine Industries Co., Ltd., average particle size 108 nm *21: Smeton-ST, manufactured by Kunimine Industries Co., Ltd., average particle size 77 nm *22: Smeton-SWN, manufactured by Kunimine Industries Co., Ltd., average particle size 127 nm *23: Laponite XLS, manufactured by Rockwood Additives Limited, average particle size 79 nm *24: Kaolin, manufactured by Brenntag Specialties, Inc., average particle size 309 nm *25: Moistnite WO, manufactured by Kunimine Industries Co., Ltd. *26: Smeton-SAN-P, manufactured by Kunimine Industries Co., Ltd. *27: PDM-40L, manufactured by Toppy Industries, Ltd., average particle size 1023 nm

[0115] <Component (C): Cationic polymer> *28: Polymer KG30, manufactured by Kao Corporation, active ingredient 30% *29: KP Polymer E, manufactured by Kao Corporation, active ingredient 35% *30: Poise C-60H, manufactured by Kao Corporation

[0116] <Component (E): Nonionic polymer> *31: Sepigel 305, manufactured by SEPIC, active ingredient 40% *32: Methocel 60SH-4000, manufactured by Shin-Etsu Chemical Co., Ltd.

[0117] 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. Also, according to the comparison between Examples 18, 19 and Example 1, it can be seen that the film formed by the aqueous composition containing component (C) has improved water resistance.

[0118] The present invention further discloses the following formulation examples.

[0119]

Table 8

[0120]

Table 9

[0121] The components described in Tables 8 and 9 are as follows. Also, the compounding amounts (mass %) described in Tables 8 and 9 are the active ingredient amounts of each component. *3: SEPINOV EMT10: manufactured by SEPIC, active ingredient 89.3% *15: Kunipia G4: manufactured by Kunimine Industries Co., Ltd., average particle size 385 nm *31: SEPIGEL 305: manufactured by SEPIC, active ingredient 40%

Industrial Applicability

[0122] According to the present invention, it is possible to provide an aqueous composition for the body that can form 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.

Claims

1. An aqueous composition for personal use comprising: (A) an anionic polymer having a sulfonic acid group or a sulfate group, the polymer having a viscosity of 5,000 mPa·s or more in a 2% by mass aqueous solution at 25°C; (B) at least one member selected from the group consisting of water-swellable clay minerals and water-swellable micas, the aspect ratio of which is 150 or more; and water, The aqueous composition for personal use has a storage modulus of 60 Pa or more and 5,000 Pa or less, as measured by dynamic viscoelasticity measurement under conditions of a temperature of 25° C., a frequency of 2 Hz, and a strain of 0.01%.

2. 2. The aqueous composition for personal use according to claim 1, wherein the content of said component (B) in said composition is 0.01% by mass or more and 10% by mass or less.

3. 3. The aqueous composition for personal use according to claim 1, wherein the mass ratio of the component (A) to the component (B) [(A) / (B)] is 0.2 or more and 20 or less.

4. 3. The aqueous composition for personal use according to claim 1, wherein the content of said component (A) in said composition is 0.1% by mass or more and 10% by mass or less.

5. 3. The aqueous composition for personal use according to claim 1 or 2, wherein the component (A) comprises at least one member selected from the group consisting of (A1) anionic polysaccharides having a sulfonic acid group or a sulfate group, and (A2) anionic polymers having a structural unit represented by the following general formula (1): 【Chemistry 1】 In formula (1), R １ is a hydrogen atom or a methyl group, and M is a hydrogen atom, an alkali metal, or ammonium.

6. The aqueous composition for personal use according to claim 1 or 2, further comprising (C) a cationic polymer.

7. The aqueous composition for personal use according to claim 1 or 2, further comprising (E) a nonionic polymer.

8. (A) an anionic polymer having a sulfonic acid group or a sulfate group, the viscosity of which in a 2% by mass aqueous solution at 25°C is 5,000 mPa·s or more; (B) one or more selected from the group consisting of water-swellable clay minerals and water-swellable micas, the aspect ratio of which is 150 or more; and water; The content of the component (B) is 0.01% by mass or more and 10% by mass or less, An aqueous composition for personal use, wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 0.2 or more and 20 or less.

9. The aqueous composition for personal use according to claim 8, further comprising (E) a nonionic polymer.

10. The aqueous composition for personal use according to claim 8 or 9, further comprising (C) a cationic polymer.

11. A cosmetic composition comprising the aqueous composition for personal use according to claim 1 or 8.

12. A method for using the composition, comprising the step of applying the aqueous body composition according to claim 1 or 8, or the cosmetic composition according to claim 11, to a keratinous substance to form a film.

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