Aqueous composition for body

Abstract

Provided is an aqueous composition for the body containing (A) an anionic polymer having a sulfonate group or a sulfate group, a 2 mass% aqueous solution of which has a viscosity of 5,000 mPa∙s or more at 25°C, (B) one or more selected from the group consisting of water-swellable clay minerals and water-swellable micas having an aspect ratio of 150 or more, and water, wherein (1) the composition has a storage modulus of 60 Pa to 5,000 Pa as measured at a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01% by dynamic viscoelasticity measurement or (2) the content of the component (B) is 0.01 mass% to 10 mass%, and the mass ratio [(A) / (B) ] of the component (A) to the component (B) is 0.2 to 20.

Description

Aqueous composition for body use

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

[0002] A technique for forming a cosmetic film on the surface of a keratinous substance is known as a method for imparting various properties, such as gloss and a pleasant feel, to keratinous substances such as skin and hair. Water-soluble polymers are used in film-forming cosmetics for skin from the viewpoint of achieving both film-forming properties and skin compatibility (see, for example, Patent Documents 1 to 3). International Publication No. 2016 / 157869 (Patent Document 1) describes that a solid powder cosmetic containing a powder, an acrylic acid-based polymer, and a water-swellable clay mineral has excellent drop strength, smooth feel in use, adhesion, and the like.

[0003] Japanese Patent Laid-Open Publication No. 2019-89744 (Patent Document 2) discloses that an emulsion composition having a standard deviation of emulsion particle size of 0.5 or more can achieve smooth and soft spreadability while having a sufficient richness and a sense of change in tone. It also discloses that the emulsion composition contains a hydrogel former, an organically modified clay mineral, etc. Japanese Patent Laid-Open Publication No. 2019-156735 (Patent Document 3) discloses that a water-in-oil cosmetic composition for preventing syneresis, which contains as an active ingredient a compound that becomes water-soluble upon neutralization, prevents syneresis and exhibits good stability. It also discloses that the cosmetic composition contains a gelling agent, water, and a powder component.

[0004] The present invention relates to the following: [1] An aqueous composition for personal use containing (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) one or more members selected from the group consisting of water-swellable clay minerals and water-swellable micas, the polymer having an aspect ratio of 150 or more, and water, wherein the storage modulus of the composition is 60 Pa or more and 5,000 Pa or less, as measured by dynamic viscoelasticity measurement at a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01%. [2] A cosmetic composition containing the aqueous composition for personal use described in [1] above. [3] A method for using the composition, the method comprising the step of applying the aqueous composition for personal use described in [1] above or the cosmetic composition described in [2] above to a keratin base to form a film.

[0005] It is known that harsh humidity environments can cause skin damage. For example, low-humidity environments cause dryness, while high-humidity environments cause the stratum corneum to become stuffy and overswell, making the skin more susceptible to irritants. The stratum corneum protects the skin by regulating the amount of moisture evaporated or absorbed from the skin surface in response to the surrounding environment. However, in daily life, human skin is repeatedly exposed to harsh humidity changes, such as when moving from an air-conditioned indoor environment to an outdoor one. This raises concerns that the stratum corneum's ability to respond to humidity changes may be insufficient, leading to accumulated skin damage.

[0006] Therefore, there is a need for a topical preparation technology that can adjust the moisture content of the skin surface in response to the surrounding environment, like the stratum corneum, and suppress skin damage in both low-humidity and high-humidity environments. Specifically, it is believed that the above-mentioned objectives can be achieved if there is a topical preparation that can form a film that exhibits water vapor barrier properties in low-humidity environments to increase skin moisture retention, and that decreases water vapor barrier properties in high-humidity environments and switches to water vapor release properties, thereby not hindering water vapor release from the stratum corneum. Conventional technologies for forming hydrophobic films can impart water vapor barrier properties to the skin, but do not exhibit environmental responsiveness that can adjust the water vapor barrier properties according to humidity.

[0007] The present invention relates to an aqueous composition for personal use that can form a film that exhibits high water vapor barrier properties in low-humidity environments and exhibits water vapor release properties in high-humidity environments.

[0008] The inventors have discovered that the above-mentioned problems can be solved by an aqueous composition for the body, which contains a predetermined anionic polymer, one or more selected from the group consisting of water-swellable clay minerals and water-swellable micas having an aspect ratio of a predetermined value or more, and water, and which has a storage modulus within a predetermined range.

[0009] According to the present invention, there is provided an aqueous composition for personal use that can form a film that exhibits high water vapor barrier properties in low-humidity environments and exhibits water vapor release properties in high-humidity environments. The composition has film-forming properties and can be used as a variety of cosmetic compositions.

[0010] [Definition] As used herein, "aqueous composition for the body" refers to an aqueous composition used to treat the surface of keratinous materials such as skin, hair, eyelashes, eyebrows, and nails. "Aqueous composition" refers to a composition containing water as a main component, and preferably refers to a composition containing 50% by mass or more of water. The aqueous composition for the body of the present invention (hereinafter also referred to simply as "aqueous composition" or "composition of the present invention") is preferably an aqueous composition for keratinous materials, more preferably an aqueous composition for skin or hair, and even more preferably an aqueous composition for skin. As used herein, "keratinous materials" refers to keratinous materials that constitute body parts of animals such as humans, such as hair, skin, and nails. As used herein, "containing component X" also includes the incorporation of component X.

[0011] In this specification, the water vapor barrier property in a low-humidity environment is defined as the water vapor barrier property at a relative humidity of 40%, and the water vapor barrier property in a high-humidity environment is defined as 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 considered that "high water vapor barrier property is exhibited in a low-humidity environment." Furthermore, in the following description, the property of exhibiting water vapor barrier property in a low-humidity environment and exhibiting water vapor release properties in a high-humidity environment may be referred to as "environmental responsiveness." In this specification, the greater 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 can be considered. Specifically, environmental responsiveness can be evaluated by the method described in the examples.

[0012] [Aqueous Composition for Personal Use] The composition of the present invention is an aqueous composition for personal use containing (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) one or more members selected from the group consisting of water-swellable clay minerals and water-swellable micas, the members having an aspect ratio of 150 or more, and water, wherein the storage modulus of the composition is measured by dynamic viscoelasticity measurement at a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01% at a temperature of 60 Pa or more and 5,000 Pa or less. By virtue of having the above-mentioned configuration, the composition of the present invention can form a film that exhibits water vapor barrier properties in low-humidity environments and water vapor release properties in high-humidity environments.

[0013] The reason why the composition of the present invention exhibits the above-mentioned effects is unclear, but is thought to be as follows. The anionic polymer having sulfonic acid or sulfate groups, which is component (A), has film-forming properties and is a hydrophilic hydrogel. Its properties change when triggered by moisture absorption, enabling the formation of a film that can exhibit environmental responsiveness. However, anionic polymers alone have limitations in improving water vapor barrier properties in low-humidity environments. Component (B) is a plate-shaped mineral with a high aspect ratio. When component (B) is added to component (A) to form a film, component (B) is dispersed in the film so that its plate-like surfaces are approximately parallel to the film surface. It is thought that the presence of component (B) lengthens the water vapor permeation path when water vapor permeates through the film thickness direction, thereby producing a so-called "maze effect." This maze effect is believed to improve water vapor barrier properties. Because component (B) has a high aspect ratio, it is thought that the water vapor barrier properties due to the maze effect are 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, because component (A) is anionic and component (B) is also negatively charged, charge repulsion occurs between component (A) and component (B), suppressing aggregation of component (B). Furthermore, because component (B) is water-swellable and has high affinity with aqueous compositions, it is believed that it is less likely to aggregate in the formed film. Furthermore, when the viscosity of a 2% by mass aqueous solution of component (A) at 25°C is a predetermined value or higher and the storage modulus of the resulting composition is within a predetermined range, defects are less likely to occur in the labyrinth structure in the formed film, and it is believed that water vapor barrier properties can be further improved. Furthermore, because both components (A) and (B) are hydrophilic, a film containing components (A) and (B) is sensitive to ambient humidity and absorbs moisture and swells in high-humidity environments. Therefore, it is thought that in a high-humidity environment, the dispersion state of component (B) in component (A) changes as the coating swells, causing defects in the labyrinth structure in the coating, which in turn causes the coating to lose its water vapor barrier properties and instead release water vapor.

[0014] <Component (A): Anionic Polymer> Component (A) is an anionic polymer having sulfonic acid groups or sulfate groups, preferably an anionic polymer having sulfonic acid groups, whose 2% by mass aqueous solution has a viscosity of 5,000 mPa·s or more at 25°C. At least a portion of the sulfonic acid groups or sulfate groups may be neutralized to form a salt. The anionic polymer of component (A) refers to a polymer that has sulfonic acid groups or sulfate groups as anionic groups and is negatively charged overall.

[0015] The viscosity of a 2% by mass aqueous solution of component (A) at 25°C is, from the viewpoints of film-forming ability, improved water vapor barrier property in low-humidity environments, and improved environmental responsiveness, at least 5,000 mPa s, preferably at least 5,500 mPa s, more preferably at least 6,000 mPa s, even more preferably at least 10,000 mPa s, still more preferably at least 30,000 mPa s, still more preferably at least 50,000 mPa s, and still more preferably at least 70,000 mPa s; and is preferably at most 200,000 mPa s, more preferably at most 150,000 mPa s, and even more preferably at most 100,000 mPa s. 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 to 200,000 mPa·s, more preferably 5,500 to 150,000 mPa·s, even more preferably 6,000 to 100,000 mPa·s, still more preferably 10,000 to 100,000 mPa·s, still more preferably 30,000 to 100,000 mPa·s, still more preferably 50,000 to 100,000 mPa·s, and still more preferably 70,000 to 100,000 mPa·s. The viscosity of a 2% by mass aqueous solution of component (A) can be measured by the method described in the examples.

[0016] From the viewpoints of film-forming ability, improving water vapor barrier properties in low-humidity environments, and improving environmental responsiveness, component (A) preferably contains 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): In formula (1), R １ is a hydrogen atom or a methyl group, and M is a hydrogen atom, an alkali metal, or ammonium.

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

[0018] Of the above, from the viewpoints of film-forming ability, improved water vapor barrier property in low-humidity environments, improved 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, even more preferably a cellulose derivative having a sulfonic acid group and a hydrophobic group having from 8 to 24 carbon atoms, still more preferably a cellulose derivative having a sulfonic acid group and a hydrophobic group having from 8 to 24 carbon atoms, still more preferably one or more selected from the group consisting of stearoxy PG hydroxyethyl cellulose sulfonic acid or a salt thereof, and still 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). 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 From the viewpoint of availability, is preferably a hydrogen atom, and M is preferably an alkali metal or ammonium, more preferably sodium or ammonium.

[0021] Component (A2) may be a polymer containing a structural unit other than the structural unit represented by general formula (1). Examples of such a structural unit include structural units derived from vinylpyrrolidone, (meth)acrylic acid or a salt thereof, (meth)acrylic acid alkyl ester, hydroxyalkyl (meth)acrylate 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 crosspolymer.

[0022] Specific examples of component (A2) include sodium polyacryloyldimethyltaurate, ammonium polyacryloyldimethyltaurate, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, polyacrylate crosspolymer-6 (ammonium acryloyldimethyltaurate, dimethylacrylamide, lauryl methacrylate and laureth-4 methacrylate), (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer, and these may be used alone or in combination. Among the above, from the viewpoints of film-forming ability, improved water vapor barrier property in low-humidity environments, improved environmental responsiveness, and availability, preferred is one or more selected from the group consisting of sodium polyacryloyldimethyltaurate, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, and polyacrylate crosspolymer-6.

[0023] From the viewpoints of film-forming ability, improved water vapor barrier property in low-humidity environments, improved environmental responsiveness, and availability, component (A) is preferably at least one selected from the group consisting of sodium polyacryloyldimethyltaurate, sodium stearoxy PG hydroxyethyl cellulose sulfonate, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, and polyacrylate crosspolymer-6.

[0024] Commercially available anionic polymers can also be used as component (A). Specific examples thereof include "SPS-S-SA" (stearoxy PG hydroxyethyl cellulose sodium sulfonate) manufactured by Kao Corporation, "Simulgel EG QD" ((sodium acrylate / sodium acryloyldimethyl taurate) copolymer), "SEPINOV EMT10", "Sepiplus S", "Simulgel FL", and "Simulgel NS" ((hydroxyethyl acrylate / sodium acryloyldimethyl taurate) copolymer) manufactured by SEPPIC, "Sepimax zen" (polyacrylate crosspolymer-6), "Aristoflex AVC" ((ammonium acryloyldimethyl taurate / VP) copolymer) manufactured by Clariant Japan Co., Ltd., and "Aristoflex Silk" ((sodium polyacryloyldimethyl taurate) and "Aristoflex" manufactured by Clariant Japan Co., Ltd. HMB" ((ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer), and the like.

[0025] <Component (B): Water-Swellable Clay Minerals and Water-Swellable Mica with an Aspect Ratio of 150 or More> Component (B) is one or more selected from the group consisting of water-swellable clay minerals and water-swellable micas with an aspect ratio of 150 or more. "Water-swellable" here refers to the property of swelling when dispersed in water, and more specifically, refers to a water swelling degree of 40 mL / 2 g or more as determined by the following test method. (Test Method) 100 mL of ion-exchanged water is placed in a 100 mL graduated cylinder. 2 g of component (B) is added in small amounts in several batches, taking care not to allow the component (B) to adhere to the walls of the cylinder. After all of component (B) has naturally settled to the bottom of the graduated cylinder, the volume (mL) of component (B) is read from the scale 24 hours later. The average value of three tests is taken as the water swelling degree (mL / 2 g) of component (B).

[0026] The water swelling degree of component (B) is 40 mL / 2g or more, preferably 42 mL / 2g or more, more preferably 45 mL / 2g or more, and even more preferably 50 mL / 2g or more, from the viewpoints of suppressing aggregation of component (B), improving water vapor barrier properties in low-humidity environments, and improving environmental responsiveness. The upper limit is not particularly limited, but is usually 90 mL / 2g or less, preferably 80 mL / 2g or less, and more preferably 75 mL / 2g or less. The water swelling degree of component (B) is preferably 40 mL / 2g or more and 90 mL / 2g or less, more preferably 42 mL / 2g or more and 90 mL / 2g or less, even more preferably 45 mL / 2g or more and 80 mL / 2g or less, and even more preferably 50 mL / 2g or more and 75 mL / 2g or less.

[0027] The aspect ratio of component (B) is 150 or more, preferably 160 or more, more preferably 180 or more, and even more preferably 190 or more, from the viewpoint of improving water vapor barrier properties in low-humidity environments and improving environmental responsiveness. The upper limit is not particularly limited, but is usually 2000 or less, preferably 1000 or less, more preferably 600 or less, even more preferably 500 or less, and even more preferably 400 or less. 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, even 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. The aspect ratio of component (B) can be measured according to the method described in Clay Science, Vol. 50, No. 3, pp. 162-174 (2012), specifically by the method described in the Examples.

[0028] From the viewpoints of film-forming ability, improved water vapor barrier properties in low-humidity environments, and improved environmental responsiveness, the average particle size of component (B) is preferably 100 nm or more, more preferably 200 nm or more, even more preferably 300 nm or more, and is preferably 2000 nm or less, more preferably 1500 nm or less, and even more preferably 1000 nm or less. 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, and even 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 (DLS).

[0029] Component (B) is one or more water-swellable clay minerals and micas having an aspect ratio of 150 or more. Hereinafter, clay minerals and micas may be collectively referred to as "minerals." The water-swellable clay minerals contain cations (Na ＋ , K. ＋ , Mg ２＋ , Ca ２＋ Specific examples include smectite, bentonite, montmorillonite, beidellite, nontrite, saponite, stevensite, hectorite, etc., and one or more of these can be used. Water-swellable mica has cations (Na) between the layers of mica. ＋ , K. ＋ , Mg ２＋ , Ca ２＋ ) and swells by absorbing water, and specific examples thereof include sodium tetrasilicic mica.

[0030] Component (B) may be a mineral that has been subjected to a surface treatment, but from the viewpoint of water swelling properties, it is preferable that the mineral is not subjected to a surface treatment or that has been subjected to a hydrophilic treatment, and it is more preferable that the mineral is not subjected to a surface treatment.

[0031] From the viewpoint of improving the water vapor barrier property in a low-humidity environment and improving the environmental responsiveness, 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 tetrasilicic mica.

[0032] Commercially available products can also be used as component (B), specific examples of which include "Kunipia G4" and "Kunipia F" (both purified bentonites (montmorillonites)) manufactured by Kunimine Industries Co., Ltd., "Bengel HV" and "Bengel Next Nc" (both bentonites) manufactured by Hojun Co., Ltd., and "NTS-5" (sodium tetrasilicic mica) manufactured by Topy Industries, Ltd.

[0033] <Content> From the viewpoint of film-forming ability and improved environmental responsiveness, the content of component (A) in the composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, still more preferably 1.0% by mass or more, and still more preferably 1.2% by mass or more. Furthermore, from the viewpoint of improved water vapor barrier property in low-humidity environments and coatability, the content is preferably 10% by mass or less, more preferably 8.0% by mass or less, even more preferably 5.0% by mass or less, and still more preferably 3.0% by mass or less. 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, even more preferably 0.3% by mass or more and 8.0% by mass or less, still more preferably 0.5% by mass or more and 8.0% by mass or less, still more preferably 1.0% by mass or more and 5.0% by mass or less, and still more preferably 1.2% by mass or more and 3.0% by mass or less.

[0034] From the viewpoint of film-forming ability and improving water vapor barrier property in low-humidity environments, the content of component (B) in the composition is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, and still more preferably 0.2% by mass or more. Furthermore, from the viewpoint of improving environmental responsiveness and improving the dispersibility of component (B), the content is preferably 10% by mass or less, more preferably 8.0% by mass or less, even more preferably 5.0% by mass or less, still more preferably 3.0% by mass or less, and still more preferably 2.0% by mass or less. 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, even 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 still more preferably 0.2% by mass or more and 2.0% by mass or less.

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

[0036] 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, even more preferably 1.0% by mass or more, still more preferably 1.5% by mass or more, and even more preferably 2.0% by mass or more, from the viewpoints of film-forming ability, improving water vapor barrier property in low-humidity environments, and improving environmental responsiveness. Furthermore, from the viewpoints of improving blend stability and coatability, it is preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, still more preferably 5.0% by mass or less, and even more preferably 4.0% by mass or less. 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, even more preferably 1.0% by mass or more and 10% by mass or less, still 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> The composition of the present invention can further contain (C) a cationic polymer from the viewpoint of improving the water resistance of the film formed. Component (C) is a polymer that can form a polyion complex by interacting with component (A). A film containing a polyion complex has a crosslinked structure and is hydrophobic, making it possible to form a film with high water resistance. The cationic polymer of component (C) is preferably a polymer that has cationic groups and is positively charged as a total charge. However, component (C) may have anionic groups, nonionic groups, or amphoteric groups such as betaine groups in addition to cationic groups, as long as the effects of the present invention are not impaired.

[0038] From the viewpoint of improving the water resistance of the coating film to be formed, component (C) is preferably one or more cationic polymers 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: In formula (2), R １１ is a hydrogen atom or a methyl group, and R １２ ~R １４are each independently an alkyl group having 1 to 4 carbon atoms, X is —O— or —NH—, and m is a number of 1 to 4.

[0039] (Component (C1)) Component (C1) is a cationic polymer containing a structural unit represented by 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 even more preferably a methyl group. X in general formula (2) is preferably —O—, and m is preferably 1 to 3, more preferably 2 to 3.

[0040] Examples of the structural unit represented by general formula (2) include one or more types selected from the group consisting of structural units derived from methacryloylethyltrimethylammonium salts, structural units derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate, and structural units derived from methacrylamidepropyltrimethylammonium salts, and preferably one or more types selected from the group consisting of structural units derived from methacryloylethyltrimethylammonium salts and structural units derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate.

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

[0042] Component (C1) may be a polymer containing a structural unit other than the structural unit represented by general formula (2). Examples of such a structural unit include structural units derived from vinyl monomers such as vinylpyrrolidone, amphoteric monomers such as (meth)acryloylethyldimethylbetaine, alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, and acrylamides such as N,N-dimethylacrylamide. Component (C1) may also be a crosspolymer crosslinked with polyethylene glycol di(meth)acrylate or the like.

[0043] Specific preferred examples of the cationic polymer containing a constituent unit represented by the general formula (2) include one or more selected from the group consisting of methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-methoxypolyethylene glycol methacrylate copolymer (Polyquaternium-49), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-hydroxyethyl methacrylate copolymer (Polyquaternium-48), and N,N-dimethylaminoethyl diethyl methacrylate sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (Polyquaternium-52). Among these, from the viewpoint of improving the water resistance of the formed coating, one or more selected from the group consisting of methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37) and N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer (Polyquaternium-52) are preferred.

[0044] Commercially available polymers can also be used as component (C1), and specific examples include "SOFCARE KG-101W-E" (Polyquaternium-52), "SOFCARE KG-301W" (Polyquaternium-52), "POLYMER KG30" (Polyquaternium-52), and "KP POLYMER E" (Polyquaternium-37), all manufactured by Kao Corporation, and "Cosmedia Ultragel 300" (Polyquaternium-37), all manufactured by BASF Japan Ltd.

[0045] (Component (C2)) Component (C2) is a cationized polysaccharide. As used herein, the term "cationized polysaccharide" refers to a modified polysaccharide in which a cationic group has been introduced into the polymer skeleton of a polysaccharide. Specific examples of cationic polysaccharides include cationized galactomannans such as cationized guar gum, cationized tara gum, cationized fenugreek gum, and cationized locust bean gum; cationic polymers having a cellulose skeleton such as cationized cellulose, cationized hydroxyethyl cellulose, cationized hydroxypropyl cellulose, and cationized carboxymethyl cellulose; and cationized starch. Among these, from the viewpoint of improving the water resistance of the formed film, the cationized polysaccharide is preferably one or more selected from the group consisting of cationized galactomannan and a cationic polymer having a cellulose skeleton, more preferably a cationic polymer having a cellulose skeleton, even more preferably cationized hydroxyethyl cellulose, and even more preferably hydroxyethyl cellulose hydroxypropyl trimethylammonium chloride ether (also known as o-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride, polyquaternium-10).

[0046] Commercially available polymers can also be used as component (C2), specific examples of which include cationized guar gums such as the "Jaguar C" series manufactured by Solvay and the "Labor Gum" series manufactured by DSP Gokyo Food & Chemical Co., Ltd., and cationized celluloses such as the "Poise C" series manufactured by Kao Corporation and the "Catinal" series manufactured by Toho Chemical Industry Co., Ltd.

[0047] From the viewpoint of improving the water resistance of the coating film to be formed, component (C) is preferably at least one member selected from the group consisting of methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37), N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer (Polyquaternium-52), and hydroxyethyl cellulose hydroxypropyltrimethylammonium chloride ether (Polyquaternium-10).

[0048] When the composition contains component (C), the content of component (C) in the composition is preferably 0.02% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, and even more preferably 0.2% by mass or more, from the viewpoint of improving the water resistance of the formed coating. Furthermore, from the viewpoint of improving the blend stability, it is preferably 10% by mass or less, more preferably 8.0% by mass or less, even 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, and even more preferably 0.5% by mass or less. The content of 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, even 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, and even more preferably 0.2% by mass or more and 0.5% by mass or less.

[0049] From the viewpoint of improving the water resistance of the formed coating, 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, even more preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, still more preferably 1.0% by mass or more, still more preferably 1.2% by mass or more, and still more preferably 1.5% by mass or more. From the viewpoint of improving the blend 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 still more preferably 3.5% by mass or less. The total content of component (A) and component (C) in the composition is preferably 0.1 mass% or more and 15 mass% or less, more preferably 0.2 mass% or more and 10 mass% or less, even more preferably 0.3 mass% or more and 5.0 mass% or less, still more preferably 0.5 mass% or more and 5.0 mass% or less, still more preferably 1.0 mass% or more and 5.0 mass% or less, still more preferably 1.2 mass% or more and 3.5 mass% or less, and still more preferably 1.5 mass% or more and 3.5 mass% or less.

[0050] The mass ratio [{(A) + (C)} / (B)] of the total amount of components (A) and (C) to component (B) in the composition is preferably 0.5 or more, more preferably 1.0 or more, and even more preferably 1.5 or more, from the viewpoint of improving the water resistance of the formed film, and is preferably 10.0 or less, more preferably 5.0 or less, and even more preferably 3.0 or less, from the viewpoint of improving the blend stability. 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 even more preferably 1.5 or more and 3.0 or less.

[0051] <Component (D): Glycerin or Condensate Thereof> The composition of the present invention may further contain glycerin or a condensate thereof as component (D) from the viewpoint of improving blend stability, improving water vapor barrier properties in low-humidity environments, and improving environmental responsiveness. Examples of glycerin or a condensate thereof include glycerin, diglycerin, polyglycerin, etc., and one or more of these can be used. Among the above, the glycerin or a condensate thereof is preferably one or more 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, even more preferably 0.5% by mass or more, and still more preferably 1.0% by mass or more, from the viewpoints of improving blend stability, improving water vapor barrier property in low-humidity environments, and improving environmental responsiveness. Furthermore, from the viewpoint of improving blend stability, the content is preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, and still more preferably 5.0% by mass or less. 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, even more preferably 0.5% by mass or more and 10% by mass or less, and still 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 may further contain a nonionic polymer as component (E) from the viewpoints of improving the water vapor barrier property in low-humidity environments, improving environmental responsiveness, and improving stability when a cosmetic composition is prepared by blending a surfactant, an oily component, etc. with the composition of the present invention. As used herein, the term "nonionic polymer" refers to a polymer that is substantially free of ionic groups, such as cationic groups, anionic groups, and amphoteric groups.

[0054] From the viewpoint of improving water vapor barrier properties in low humidity environments and improving environmental responsiveness, component (E) is preferably a nonionic polymer having a viscosity of 1,500 mPa·s or more in a 2% by mass aqueous solution at 25°C. From the viewpoints of film-forming ability, improved water vapor barrier property in low-humidity environments, and improved environmental responsiveness, the viscosity of a 2 mass% aqueous solution of component (E) at 25°C is more preferably 5,000 mPa s or more, even more preferably 10,000 mPa s or more, still more preferably 15,000 mPa s or more, and still more preferably 20,000 mPa s or more; and is preferably 1,000,000 mPa s or less, more preferably 800,000 mPa s or less, even more preferably 600,000 mPa s or less, still more preferably 500,000 mPa s or less, still more preferably 300,000 mPa s or less, still more preferably 200,000 mPa s or less, and still more preferably 150,000 mPa s or less. The viscosity of a 2% by mass aqueous solution of 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, even more preferably 5,000 mPa·s or more and 800,000 mPa·s or less, still more preferably 10,000 mPa·s or more and 600,000 mPa·s or less, still more preferably 15,000 mPa·s or more and 500,000 mPa·s or less, still more preferably 15,000 mPa·s or more and 300,000 mPa·s or less, still more preferably 20,000 mPa·s or more and 200,000 mPa·s or less, and still 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)acrylamides, polymers containing structural units derived from (meth)acrylic acid esters, and nonionic polysaccharides, and one or more of these can be used. In this specification, "(meth)acrylic" 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 with nonionic monomers such as (meth)acrylic acid esters, vinylpyrrolidone, vinyl acetate, and vinyl methyl ether. Examples of N-substituted (meth)acrylamides include dialkyl(meth)acrylamides such as dimethyl(meth)acrylamide and diethyl(meth)acrylamide. Examples of N-unsubstituted (meth)acrylamides include acrylamide and methacrylamide.

[0057] Examples of the (meth)acrylic acid ester include (meth)acrylic acid alkyl ester, (meth)acrylic acid hydroxyalkyl ester, and (meth)acrylic acid alkyl ether.

[0058] Specific examples of polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide include polyacrylamide, polymethacrylamide, polydimethylacrylamide, polydiethylacrylamide, ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, (vinylpyrrolidone / (meth)acrylamide) copolymer, ((meth)acrylamide / alkyl acrylate) copolymer, (dimethylacrylamide / alkyl acrylate) copolymer, (dimethylacrylamide / hydroxyethyl acrylate / methoxyethyl acrylate) copolymer, etc. Among these, polymers preferably contain one or more selected from the group consisting of polyacrylamide, polymethacrylamide, polydimethylacrylamide, polydiethylacrylamide, and ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, and more preferably contain polyacrylamide.

[0059] Examples of polymers containing structural units derived from (meth)acrylic esters include homopolymers of (meth)acrylic esters and copolymers of (meth)acrylic esters with nonionic monomers such as vinylpyrrolidone, vinyl acetate, and vinyl methyl ether. Examples of (meth)acrylic esters include alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates, and alkyl ether (meth)acrylates. Note that "polymers containing structural units derived from (meth)acrylic esters" exclude polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamides. Specific examples of polymers containing structural units derived from (meth)acrylic esters include (vinylpyrrolidone / alkyl acrylate) copolymers and (hydroxyethyl acrylate / methoxyethyl acrylate) copolymers.

[0060] Examples of nonionic polysaccharides include starch, cellulose, guar gum, tara gum, locust bean gum, glucomannan, and other nonionic polysaccharides, as well as derivatives thereof. Among these, from the viewpoints of film-forming ability, improved water vapor barrier properties in low-humidity environments, and improved 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 even more preferably includes a cellulose derivative having a substituent containing an alkyl group having 8 or more carbon atoms.

[0061] Preferred examples of the substituent containing an alkyl group having 8 or more carbon atoms include an alkyl group having 8 or more carbon atoms, a hydroxyalkyl group containing an alkyl group having 8 or more carbon atoms, and a hydroxyalkyl-alkyl ether group containing an alkyl group having 8 or more carbon atoms. Of these, preferred is one or more selected from the group consisting of an alkyl group having 8 or more carbon atoms and a hydroxyalkyl-alkyl ether group containing an alkyl group having 8 or more carbon atoms, and more preferred is a hydroxyalkyl-alkyl ether group containing an alkyl group having 8 or more carbon atoms.

[0062] The alkyl group having 8 or more carbon atoms is preferably an alkyl group having 8 to 22 carbon atoms, more preferably an alkyl group having 12 to 22 carbon atoms, even more preferably an alkyl group having 16 to 22 carbon atoms, and still more preferably an alkyl group having 18 to 22 carbon atoms. Specific examples of alkyl groups having 8 or more carbon atoms include linear or branched octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, myristyl, pentadecyl, palmityl, heptadecyl, stearyl, isostearyl, nonadecyl, icosyl, heneicosyl, and behenyl groups. Among the above, from the viewpoints of film-forming ability, improved water vapor barrier properties in low-humidity environments, and improved environmental responsiveness, the alkyl group having 8 or more carbon atoms is preferably one or more selected from the group consisting of dodecyl, tridecyl, myristyl, pentadecyl, cetyl, heptadecyl, stearyl, isostearyl, nonadecyl, icosyl, heneicosyl, and behenyl groups, more preferably one or more selected from the group consisting of cetyl, stearyl, isostearyl, icosyl, heneicosyl, and behenyl groups, and even more preferably one or more selected from the group consisting of stearyl and behenyl groups.

[0063] In the derivative of a nonionic polysaccharide having a substituent containing an alkyl group having 8 or more carbon atoms, the parent nonionic polysaccharide into which the substituent containing an alkyl group having 8 or more carbon atoms is introduced may have a substituent containing a short-chain alkyl group having 3 or less carbon atoms. Specifically, it may be a compound in which an unsubstituted nonionic polysaccharide is substituted with one or more groups selected from the group consisting of alkyl groups, hydroxyalkyl groups, and dihydroxyalkyl groups, all of which have 3 or less carbon atoms. Furthermore, the parent nonionic polysaccharide is preferably a compound having a cellulose skeleton. In other words, the "unsubstituted nonionic polysaccharide" is preferably cellulose.

[0064] Examples of the compound having a cellulose skeleton, which is the parent nonionic polysaccharide, include alkyl celluloses having only an alkyl group having 3 or less 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 having 3 or less carbon atoms.

[0065] Specific examples of alkyl celluloses having only alkyl groups having 3 or less carbon atoms include methyl cellulose, ethyl cellulose, propyl cellulose, methylethyl cellulose, methylpropyl cellulose, ethylpropyl cellulose, etc. Specific examples of hydroxyalkyl celluloses having a hydroxyalkyl group or a dihydroxyalkyl group include hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, dihydroxypropyl hydroxyethyl cellulose, dihydroxypropyl hydroxypropyl cellulose, etc., with one or more selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, and dihydroxypropyl hydroxyethyl cellulose being preferred. Specific examples of hydroxyalkyl-alkyl celluloses having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group having 3 or less carbon atoms include hydroxymethyl-methyl cellulose, hydroxyethyl-methyl cellulose, hydroxymethyl-propyl cellulose, hydroxyethyl-methyl cellulose, hydroxyethyl-ethyl cellulose, hydroxyethyl-propyl cellulose, hydroxypropyl-methyl cellulose, hydroxypropyl-ethyl cellulose, hydroxypropyl-propyl cellulose, dihydroxypropyl hydroxyethyl-methyl cellulose, dihydroxypropyl hydroxypropyl-methyl cellulose, etc.

[0066] The cellulose derivative having a substituent containing an alkyl group having 8 or more carbon atoms is more preferably a compound in which a substituent containing an alkyl group having 8 or more carbon atoms has been introduced into the cellulose having the above-mentioned hydroxyalkyl group or dihydroxyalkyl group.

[0067] Specific examples of compounds in which a substituent containing an alkyl group having 8 or more carbon atoms has been introduced into a cellulose having a hydroxyalkyl group or a dihydroxyalkyl group include cetyl hydroxyethyl cellulose (such as "Polysurf 67CS" manufactured by Ashland) and stearoxy PG hydroxyethyl cellulose (display name).

[0068] From the viewpoints of film-forming ability, improved water vapor barrier properties in low-humidity environments, and improved environmental responsiveness, component (E) preferably contains one or more members selected from the group consisting of polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide and nonionic polysaccharides. Among the above, from the viewpoints of film-forming ability, improved water vapor barrier property in low-humidity environments, improved environmental responsiveness, and availability, component (E) preferably comprises one or more selected from the group consisting of polyacrylamide, polymethacrylamide, polydimethylacrylamide, polydiethylacrylamide, a ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, and a cellulose derivative having a substituent containing an alkyl group having 8 or more carbon atoms, more preferably one or more selected from the group consisting of polyacrylamide, a compound in which a substituent containing an alkyl group having 8 or more carbon atoms has been introduced into a hydroxyalkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group, and a compound in which a substituent containing an alkyl group having 8 or more carbon atoms has been introduced into a hydroxyalkyl-alkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group having 3 or less carbon atoms, even more preferably one or more selected from the group consisting of polyacrylamide, cetyl hydroxyethyl cellulose, and stearoxy PG hydroxyethyl cellulose, and even more preferably one or more 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, even more preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, still more preferably 0.7% by mass or more, still more preferably 1.0% by mass or more, and still more preferably 1.2% by mass or more, from the viewpoints of film-forming ability and improved environmental responsiveness. Furthermore, from the viewpoints of improved water vapor barrier property in low-humidity environments and coatability, the content is preferably 10% by mass or less, more preferably 8.0% by mass or less, even more preferably 5.0% by mass or less, and still more preferably 3.0% by mass or less. 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, even more preferably 0.3% by mass or more and 8.0% by mass or less, still more preferably 0.5% by mass or more and 8.0% by mass or less, still more preferably 0.7% by mass or more and 5.0% by mass or less, still more preferably 1.0% by mass or more and 5.0% by mass or less, and still 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 of component (E) to component (A) in the composition [(E) / (A)] is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.3 or more, still more preferably 0.5 or more, and still more preferably 1.0 or more, from the viewpoint of film-forming ability and improved environmental responsiveness, and is preferably 10 or less, more preferably 5.0 or less, even more preferably 3.0 or less, still more preferably 2.0 or less, and still more preferably 1.5 or less, from the viewpoint of improved blend stability. 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, even more preferably 0.3 or more and 3.0 or less, still more preferably 0.5 or more and 2.0 or less, and still 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, and even more preferably 1.5 or more, from the viewpoints of film-forming ability and improving environmental responsiveness, and is preferably 10.0 or less, more preferably 5.0 or less, and even more preferably 3.0 or less, from the viewpoints of improving water vapor barrier property and blend stability in low-humidity environments. 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 even more preferably 1.5 or more and 3.0 or less.

[0072] <Water> The composition of the present invention is an aqueous composition and therefore contains water. Deionized water or distilled water is preferred as the water. Furthermore, 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. From the viewpoint of forming an aqueous composition and improving blend stability, the water content in the composition is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, and even more preferably 85% by mass or more. The water content in the composition may be the remainder of components (A) and (B).

[0073] <Storage Modulus> From the viewpoints of film-forming ability, improved water vapor barrier property in low-humidity environments, and improved environmental responsiveness, the composition of the present invention 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%. When the storage modulus of the composition is within the above range, defects are less likely to occur in the labyrinth structure of the film formed, and it is believed that the water vapor barrier property can be improved. From the viewpoints of film-forming ability, improved water vapor barrier property in low-humidity environments, and improved environmental responsiveness, the storage modulus of the composition is preferably 80 Pa or more, more preferably 100 Pa or more, and even more preferably 150 Pa or more. Furthermore, from the viewpoints of film-forming ability, improved water vapor barrier property in low-humidity environments, and coatability, the storage modulus is preferably 4,000 Pa or less, more preferably 3,500 Pa or less, and even more preferably 3,000 Pa or less. The storage modulus of the composition of the present invention, measured by dynamic viscoelasticity measurement under 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, preferably 80 Pa or more and 4,000 Pa or less, more preferably 100 Pa or more and 3,500 Pa or less, and even more preferably 150 Pa or more and 3,000 Pa or less.

[0074] The storage modulus of the composition can be adjusted to fall within the above-mentioned range by adjusting the type, amount, and ratio of each component. The storage modulus G' of the composition is the value measured using a rheometer ("MCR502" manufactured by Anton Paar) at a temperature of 25°C and a measurement frequency of 2 Hz, over a strain range of 0.001% to 100%.

[0075] The present invention further provides an aqueous composition for the body, comprising: (A) an anionic polymer having sulfonic acid groups or sulfate groups, 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, wherein the content of component (B) is 0.01% by mass or more and 10% by mass or less; and the mass ratio of component (A) to component (B) [(A) / (B)] is 0.2 or more and 20 or less. Hereinafter, this aqueous composition for the body may also be referred to as the "aqueous composition of the second invention" as appropriate. The components (A), (B), and water used in the aqueous composition of the second invention, as well as preferred embodiments thereof, are the same as those described above.

[0076] 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, and even more preferably 0.2% by mass or more, from the viewpoints of film-forming ability and improving water vapor barrier property in low-humidity environments. Furthermore, from the viewpoints of improving environmental responsiveness and improving the dispersibility of component (B), the content is 10% by mass or less, preferably 8.0% by mass or less, 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. 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, 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.

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

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

[0079] <Component (E): Nonionic Polymer> The aqueous composition of the second invention may further contain a nonionic polymer as component (E) from the viewpoints of improving the water vapor barrier property in low-humidity environments, improving environmental responsiveness, and improving stability when a cosmetic composition is prepared by blending a surfactant, an oily component, etc. with the aqueous composition of the second invention. The type, content, and preferred embodiments of the nonionic polymer are the same as described above.

[0080] [Method for Producing Composition] The method for producing the composition of the present invention (including the aqueous composition of the second invention; the same applies hereinafter) is not particularly limited, and the composition can be produced by mixing the respective components by a known method. When the composition contains a cationic polymer (C), from the viewpoint of improving blend stability and improving production efficiency, the method for producing the composition of the present invention preferably includes a step of mixing an aqueous dispersion containing components (A) and (B) with component (C). More specifically, it is more preferable to previously prepare an aqueous dispersion containing components (A) and (B), and then mix the aqueous dispersion with component (C) or a solution thereof. Similarly, when the composition contains a nonionic polymer (E), from the viewpoint of improving blend stability and improving production efficiency, it is more preferable to previously prepare an aqueous dispersion containing components (A) and (B), and then mix the aqueous dispersion with component (E) or a solution thereof. More specifically, it is more preferable to previously prepare an aqueous dispersion containing components (A) and (B), and then mix the aqueous dispersion with component (E) or a solution thereof. When the composition contains a cationic polymer (C) and a nonionic polymer (E), the order of mixing components (C) and (E) is not particularly limited. The mixing conditions for mixing the components are not particularly limited, and mixing can usually 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 low-humidity environments and water vapor release properties in high-humidity environments. The cosmetic composition can be obtained by mixing the aqueous composition with other components within a range that does not impair the effects of the present invention. Examples of such other components include surfactants, pH adjusters, oils, texture improvers, colorants, antioxidants, antidandruff agents, vitamins, disinfectants, anti-inflammatory agents, preservatives, chelating agents, moisturizers, pearlescent agents, ceramides, plant extracts, and UV absorbers. The content of the aqueous composition in the cosmetic composition is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and even more preferably 90% by mass or more, but not more than 100% by mass. The aqueous composition may be used as a cosmetic composition as is.

[0082] <Form of Cosmetic Composition> The cosmetic composition of the present invention may be in the form of an emulsion cosmetic composition in addition to an aqueous cosmetic composition. The emulsion cosmetic composition may be either an oil-in-water cosmetic composition or a water-in-oil cosmetic composition, but is preferably an oil-in-water emulsion cosmetic composition from the viewpoint of not impairing the effects of an aqueous composition and from the viewpoint of improving the feel when used.

[0083] Examples of types of cosmetic compositions include skin cosmetic compositions and hair cosmetic compositions, with skin cosmetic compositions being preferred. Furthermore, from the viewpoint of the effectiveness of the effect of the present invention, i.e., having film-forming properties, the cosmetic composition is preferably a leave-on cosmetic composition that is applied to an object to be treated and used without rinsing off. Among the cosmetic compositions, examples of product forms of skin cosmetic compositions include makeup cosmetics, sunscreens, makeup bases, emulsions, serums, and creams. Examples of product forms of hair cosmetic compositions include hair shampoos, hair rinses, hair conditioners, hair treatments (including leave-in types), hair styling agents, hair colors, and permanent agents. Among these, from the viewpoint of the effectiveness of the effect of the present invention, i.e., having film-forming properties, the hair cosmetic composition is preferably a hair conditioner, hair treatment, or hair styling agent.

[0084] [Method of Use] The present invention further provides a method of using the composition, comprising the step of applying the aqueous body composition or the cosmetic composition to a keratinous substance to form a film. From the viewpoint of the effectiveness of the effects of the present invention, the keratinous substance is preferably skin or hair, more preferably skin.

[0085] In the method for using the composition of the present invention, the aqueous body composition or the cosmetic composition is first applied to a keratinous substance. The method for applying the composition includes coating, casting, or spraying the composition onto the keratinous substance, and coating is preferred.

[0086] When the keratinous substance is skin, the amount of the composition to be applied to the skin is determined based on the amount of the composition per 1 cm of skin, from the viewpoint of forming a film that exhibits water vapor barrier properties in a low humidity environment and exhibits water vapor release properties in a high humidity environment. ２ The amount per unit is preferably 0.01 mg or more and 50 mg or less, more preferably 0.1 mg or more and 30 mg or less.

[0087] When the keratinous material is 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, the amount of the composition applied to the hair is, in terms of a bath ratio (mass of composition / dry mass of hair to which the composition is applied) relative to the mass of the hair to which the composition is applied, preferably 0.005 or more, more preferably 0.01 or more, even more preferably 0.05 or more, and is preferably 20 or less, more preferably 15 or less, even more preferably 12 or less. The hair to which the composition is applied may be all or part of the head of hair.

[0088] After applying the composition to the keratinous material, a step of rinsing the composition may be carried out. However, from the viewpoint of the effectiveness of the effect of the present invention, that is, having film-forming properties, it is preferable to carry out a drying treatment without carrying out a step of rinsing the composition, thereby forming a film on the surface of the keratinous material. When the keratinous material is skin, natural drying may be carried out. When the keratinous material is hair, drying treatment may be carried out using towel drying, a hair dryer, or the like, in addition to natural drying.

[0089] In addition to the above-described embodiments, the present invention further discloses the following: <1> An aqueous composition for personal use containing (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) one or more members selected from the group consisting of water-swellable clay minerals and water-swellable micas, the members having an aspect ratio of 150 or more, and water, wherein the storage modulus of the composition is 60 Pa or more and 5,000 Pa or less, as measured by dynamic viscoelasticity measurement at a temperature of 25°C, a frequency of 2 Hz, and a strain of 0.01%. <2> The aqueous composition for personal use according to <1>, wherein the viscosity of a 2% by mass aqueous solution of the component (A) at 25°C is preferably from 5,000 mPa·s to 200,000 mPa·s, more preferably from 5,500 mPa·s to 150,000 mPa·s, even more preferably from 6,000 mPa·s to 100,000 mPa·s, still more preferably from 10,000 mPa·s to 100,000 mPa·s, still more preferably from 30,000 mPa·s to 100,000 mPa·s, still more preferably from 50,000 mPa·s to 100,000 mPa·s, and still more preferably from 70,000 mPa·s to 100,000 mPa·s. <3> The aqueous composition for personal use according to <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): In formula (1), R １ is a hydrogen atom or a methyl group, and M is a hydrogen atom, an alkali metal, or ammonium. １is preferably a hydrogen atom, and M is preferably an alkali metal or ammonium, more preferably sodium or ammonium. <5> The aqueous composition for personal use according to <5>, wherein the component (A1) is preferably a semi-synthetic polysaccharide, more preferably a cellulose derivative having a sulfonic acid group or a sulfate group, even more preferably a cellulose derivative having a sulfonic acid group and a hydrophobic group having from 8 to 24 carbon atoms, still more preferably a cellulose derivative having a sulfonic acid group and a hydrophobic group having from 8 to 24 carbon atoms, even more preferably one or more selected from the group consisting of stearoxy PG hydroxyethyl cellulose sulfonate or a salt thereof, and still more preferably sodium stearoxy PG hydroxyethyl cellulose sulfonate. <6> The aqueous composition for personal use according to <5>, wherein the semi-synthetic polysaccharide is a cellulose derivative or a starch derivative having a sulfonic acid group or a sulfate group. <7> The aqueous composition for personal use according to any one of <3> to <6>, wherein the component (A2) is one or more selected from the group consisting of sodium polyacryloyldimethyltaurate, ammonium polyacryloyldimethyltaurate, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, polyacrylate crosspolymer-6 (ammonium acryloyldimethyltaurate, dimethylacrylamide, lauryl methacrylate and laureth-4 methacrylate), and (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer, preferably one or more selected from the group consisting of (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, and polyacrylate crosspolymer-6.<8> The aqueous composition for personal use according to any one of <1> to <7>, wherein the component (A) is preferably one or more selected from the group consisting of sodium polyacryloyldimethyltaurate, sodium stearoxy PG hydroxyethylcellulose sulfonate, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (ammonium acryloyldimethyltaurate / VP) copolymer, and polyacrylate crosspolymer-6. <9> The aqueous composition for personal use according to any one of <1> to <8>, wherein the component (B) has a water swelling degree of 40 mL / 2 g or more as determined by the following test method. (Test method) 100 mL of ion-exchanged water is placed in a 100 mL graduated cylinder. 2 g of component (B) is added to the water in small amounts in several batches, taking care not to contact the wall of the graduated cylinder. After all of the component (B) has naturally settled to the bottom of the measuring cylinder, the volume (mL) of the component (B) after 24 hours is read from the scale. The average value of three tests is the water swelling degree (mL / 2g) of the component (B). <10> The aqueous body composition according to any one of <1> to <9>, wherein the water swelling degree ga of the component (B) is preferably 40 mL / 2g or more and 90 mL / 2g or less, more preferably 42 mL / 2g or more and 90 mL / 2g or less, even more preferably 45 mL / 2g or more and 80 mL / 2g or less, and still more preferably 50 mL / 2g or more and 75 mL / 2g or less.

[0090] <11> The aqueous composition for personal use according to any one of <1> to <10>, wherein the aspect ratio of the component (B) is preferably from 150 to 2,000, more preferably from 150 to 1,000, even more preferably from 160 to 600, still more preferably from 180 to 500, and still more preferably from 190 to 400. <12> The aqueous composition for personal use according to any one of <1> to <11>, wherein the average particle size of the component (B) is preferably from 100 nm to 2,000 nm, more preferably from 200 nm to 1,500 nm, and still more preferably from 300 nm to 1,000 nm. <13> The aqueous composition for personal use according to any one of <1> to <12>, wherein the component (B) is preferably one or more selected from the group consisting of water-swellable bentonite, water-swellable montmorillonite, and water-swellable mica, more preferably one or more selected from the group consisting of water-swellable bentonite, water-swellable montmorillonite, and sodium tetrasilicic mica. <14> The aqueous composition for personal use according to any one of <1> to <13>, wherein the content of component (A) in the aqueous composition for personal use is preferably 0.1% by mass to 10% by mass, more preferably 0.2% by mass to 10% by mass, even more preferably 0.3% by mass to 8.0% by mass, still more preferably 0.5% by mass to 8.0% by mass, still more preferably 1.0% by mass to 5.0% by mass, and even more preferably 1.2% by mass to 3.0% by mass. <15> The aqueous composition for personal use according to any one of <1> to <14>, wherein the content of component (B) in the aqueous composition for personal use 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, even 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. <16> The aqueous composition for personal use according to any one of <1> to <15>, wherein the mass ratio of component (A) to component (B) in the aqueous composition for personal use [(A) / (B)] is preferably 0.2 or more and 20% by mass or less, more preferably 0.3 or more and 20% by mass or less, even more preferably 0.5 or more and 18% by mass or less, still more preferably 0.8 or more and 18% by mass or less, still more preferably 1.0 or more and 15% by mass or less, and even more preferably 1.5 or more and 10% by mass or less.<17> The aqueous composition for personal use according to any one of <1> to <16>, wherein the total content of component (A) and component (B) in the aqueous composition for personal use 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, even more preferably 1.0% by mass or more and 10% by mass or less, still 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. <18> The aqueous composition for personal use according to any one of <1> to <17>, wherein the content of water in the aqueous composition for personal use is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, and even more preferably 85% by mass or more. <19> The aqueous composition for personal use according to any one of <1> to <18>, further comprising (C) a cationic polymer. <20> The aqueous composition for body use according to <19>, wherein the component (C) is preferably one or more cationic polymers 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: In formula (2), R １１ is a hydrogen atom or a methyl group, and R １２ ~R １４ are each independently an alkyl group having 1 to 4 carbon atoms, X is —O— or —NH—, and m is a number of 1 to 4.

[0091] <21> The aqueous body composition according to <20>, wherein the component (C1) is at least one selected from the group consisting of methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37), methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / methoxypolyethylene glycol methacrylate copolymer (Polyquaternium-49), methacryloylethyldimethylbetaine / methacryloylethyltrimethylammonium chloride / 2-hydroxyethyl methacrylate copolymer (Polyquaternium-48), and N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer (Polyquaternium-52), preferably at least one selected from the group consisting of methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37) and N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer (Polyquaternium-52). <22> The aqueous composition for personal use according to <20> or <21>, wherein the component (C2) is preferably one or more selected from the group consisting of cationized galactomannan and a cationic polymer having a cellulose skeleton, more preferably a cationic polymer having a cellulose skeleton, even more preferably cationized hydroxyethyl cellulose, and still more preferably hydroxyethyl cellulose hydroxypropyl trimethyl ammonium chloride ether (Polyquaternium-10). <23> The aqueous composition for personal use according to any one of <19> to <22>, wherein the component (C) is preferably one or more selected from the group consisting of methacryloylethyl trimethyl ammonium chloride polymer (Polyquaternium-37), N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer (Polyquaternium-52), and hydroxyethyl cellulose hydroxypropyl trimethyl ammonium chloride ether (Polyquaternium-10).<24> The aqueous composition for personal use according to any one of <19> to <23>, wherein the content of component (C) in the aqueous composition for personal use is preferably from 0.02 to 10% by mass, more preferably from 0.05 to 8.0% by mass, even more preferably from 0.1 to 5.0% by mass, still more preferably from 0.2 to 2.0% by mass, still more preferably from 0.2 to 1.0% by mass, and even more preferably from 0.2 to 0.5% by mass. <25> The aqueous composition for personal use according to any one of <19> to <24>, wherein the total content of component (A) and component (C) in the aqueous composition for personal use is preferably from 0.1 to 15% by mass, more preferably from 0.2 to 10% by mass, even more preferably from 0.3 to 5.0% by mass, still more preferably from 0.5 to 5.0% by mass, still more preferably from 1.0 to 5.0% by mass, still more preferably from 1.2 to 3.5% by mass, and still more preferably from 1.5 to 3.5% by mass. <26> The aqueous composition for personal use according to any one of <19> to <25>, wherein the mass ratio of the total amount of component (A) and component (C) to component (B) in the aqueous composition for personal use, [{(A) + (C)} / (B)], is preferably from 0.5 to 10.0, more preferably from 1.0 to 5.0, and even more preferably from 1.5 to 3.0. <27> The aqueous composition for personal use according to any one of <1> to <26>, further comprising glycerin or a condensate thereof as component (D). <28> The aqueous composition for personal use according to <27>, wherein component (D) is preferably one or more selected from the group consisting of glycerin and diglycerin, more preferably glycerin. <29> The aqueous composition for personal use according to <27> or <28>, wherein the content of component (D) in the aqueous composition for personal use 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, even more preferably 0.5% by mass or more and 10% by mass or less, and still more preferably 1.0% by mass or more and 5.0% by mass or less. <30> The aqueous composition for personal use according to any one of <1> to <29>, further comprising (E) a nonionic polymer.<31> The aqueous composition for personal use according to <30>, wherein the viscosity of a 2% by mass aqueous solution of the component (E) at 25°C is preferably 1,500 mPa·s or more, more preferably from 1,500 mPa·s to 1,000,000 mPa·s, even more preferably from 5,000 mPa·s to 800,000 mPa·s, still more preferably from 10,000 mPa·s to 600,000 mPa·s, still more preferably from 15,000 mPa·s to 500,000 mPa·s, still more preferably from 15,000 mPa·s to 300,000 mPa·s, still more preferably from 20,000 mPa·s to 200,000 mPa·s, and still more preferably from 20,000 mPa·s to 150,000 mPa·s. <32> The component (E) comprises one or more selected from the group consisting of a polymer containing a structural unit derived from N-substituted or unsubstituted (meth)acrylamide, a polymer containing a structural unit derived from a (meth)acrylic acid ester, and a nonionic polysaccharide, preferably one or more selected from the group consisting of polyacrylamide, polymethacrylamide, polydimethylacrylamide, polydiethylacrylamide, a ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, and a cellulose derivative having a substituent containing an alkyl group having 8 or more carbon atoms, more preferably polyacrylamide, a hydroxyalkyl group, or a hydroxyalkyl cellulose having a dihydroxyalkyl group. and compounds in which a substituent containing an alkyl group having 8 or more carbon atoms has been introduced into a hydroxyalkyl-alkyl cellulose having a hydroxyalkyl group or a dihydroxyalkyl group and an alkyl group having 3 or less carbon atoms, wherein the substituent containing an alkyl group having 8 or more carbon atoms has been introduced into the hydroxyalkyl-alkyl cellulose; more preferably, the aqueous composition for body use according to <30> or <31> contains one or more selected from the group consisting of polyacrylamide, cetyl hydroxyethyl cellulose, and stearoxy PG hydroxyethyl cellulose; and even more preferably, the aqueous composition for body use according to <30> or <31> contains one or more selected from the group consisting of polyacrylamide and stearoxy PG hydroxyethyl cellulose.<33> The aqueous composition for personal use according to any one of <30> to <32>, wherein the content of component (E) in the aqueous composition for personal use is preferably 0.1% by mass to 10% by mass, more preferably 0.2% by mass to 10% by mass, even more preferably 0.3% by mass to 8.0% by mass, still more preferably 0.5% by mass to 8.0% by mass, still more preferably 0.7% by mass to 5.0% by mass, still more preferably 1.0% by mass to 5.0% by mass, and still more preferably 1.2% by mass to 3.0% by mass. <34> The aqueous composition for personal use according to any one of <30> to <33>, wherein the mass ratio of component (E) to component (A) in the aqueous composition for personal use [(E) / (A)] is preferably 0.1 to 10, more preferably 0.2 to 5.0, even more preferably 0.3 to 3.0, still more preferably 0.5 to 2.0, and still more preferably 1.0 to 1.5. <35> The aqueous composition for personal use according to any one of <30> to <34>, wherein the mass ratio of the total amount of components (A), (C) and (E) to component (B) in the aqueous composition for personal use, [{(A) + (C) + (E)} / (B)], is preferably 0.5 or more and 10.0 or less, more preferably 1.0 or more and 5.0 or less, and even more preferably 1.5 or more and 3.0 or less. <36> The aqueous composition for personal use according to any one of <1> to <35>, wherein the storage modulus of the aqueous composition for personal use, measured by dynamic viscoelasticity measurement under 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, and even more preferably 150 Pa or more and 3,000 Pa or less.

[0092] <37> An aqueous composition for personal use according to <37>, 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) one or more selected from the group consisting of water-swellable clay minerals and water-swellable micas, the polymer having an aspect ratio of 150 or more, and water, wherein the content of component (B) is from 0.01% by mass to 10% by mass, and the mass ratio of component (A) to component (B) [(A) / (B)] is from 0.2 to 20. <38> The aqueous composition for personal use according to <37>, wherein the content of component (B) in the aqueous composition for personal use is preferably from 0.05% by mass to 8.0% by mass, more preferably from 0.1% by mass to 5.0% by mass, even more preferably from 0.1% by mass to 3.0% by mass, and still more preferably from 0.2% by mass to 2.0% by mass. <39> The aqueous personal composition according to <37> or <38>, wherein the mass ratio of component (A) to component (B) in the aqueous personal composition [(A) / (B)] is preferably 0.3 or more and 20 or less, more preferably 0.5 or more and 18 or less, even more preferably 0.8 or more and 18 or less, still more preferably 1.0 or more and 15 or less, and even more preferably 1.5 or more and 10 or less. <40> A cosmetic composition comprising the aqueous personal composition according to any one of <1> to <39>. <41> The cosmetic composition according to <40>, wherein the content of the aqueous personal composition in the cosmetic composition is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and still more preferably 90% by mass or more and 100% by mass or less. <42> The cosmetic composition according to <40> or <41>, wherein the cosmetic composition is a skin cosmetic composition or a hair cosmetic composition, preferably a skin cosmetic composition. <43> The cosmetic composition according to any one of <40> to <42>, wherein the cosmetic composition is preferably a leave-on cosmetic composition that is used without rinsing after application to an object to be treated. <44> A method for using a composition, comprising a step of applying an aqueous body composition according to any one of <1> to <39> or a cosmetic composition according to any one of <40> to <43> to a keratinous material to form a film. <45> The method according to <44>, wherein the keratinous material is preferably skin or hair, more preferably skin.

[0093] The present invention will be described below with reference to examples, but the present invention is not limited to the scope of the examples. Measurements and evaluations in the examples were carried out by the following methods.

[0094] (Measurement of 2 mass% aqueous solution viscosity of anionic polymer and nonionic polymer) A 2 mass% aqueous solution of the anionic polymer (component (A) or component (A')) and nonionic polymer (component (E)) used in each example was prepared, and the aqueous solution viscosity at 25°C was measured by the following method. In this example, anionic polymers other than component (A) were referred to as "component (A')". Less than 500 mPa s: Measurement was performed at 10 rpm using a Brookfield viscometer "DV2T" manufactured by Eiko Seiki Co., Ltd., with a spindle of CPA-41Z (angle 3 degrees, radius 24 mm). 500 mPa s or more and less than 3,000 mPa s: Measurement was performed at 30 rpm using a B-type viscometer "TVB-10" manufactured by Toki Sangyo Co., Ltd., with a spindle of M3. 3,000 mPa s or more and less than 20,000 mPa s: Measurement was performed at 30 rpm using a Brookfield viscometer "TVB-10" manufactured by Toki Sangyo Co., Ltd., with a spindle of M4. 20,000 mPa s or more and less than 30,000 mPa s: Measurement was performed at 10 rpm using a Brookfield viscometer "TVB-10" and a "T-bar stage" T-C manufactured by Toki Sangyo Co., Ltd. 30,000 mPa s or more: Measurement was performed at 10 rpm using a Brookfield viscometer "TVB-10" and a "T-bar 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') listed in the table was determined according to the method described in Clay Science, Vol. 50, No. 3, pp. 162-174 (2012). In this example, minerals other than component (B) are referred to as "component (B')." Ion-exchanged water and aqueous dispersions of component (B) or component (B') at concentrations of 0.5 mass%, 0.25 mass%, and 0.1 mass% were measured at 25°C and a shear rate of 100 s using a rheometer ("MCR502" manufactured by Anton Paar). －１The viscosity at each concentration was measured. The reduced viscosity of the aqueous dispersion of component (B) or component (B') at each concentration was determined using the viscosity of the resulting aqueous dispersion, the viscosity of water, and the volume ratio of component (B) or component (B'). A regression line was created with the reduced viscosity value on the vertical axis and the volume ratio of component (B) or component (B') on the horizontal axis, and the intrinsic viscosity of component (B) or component (B') was determined from the intercept. The obtained intrinsic viscosity was substituted into the following Simha equation described in Journal of Physical Chemistry, 44, 25-34 (1940), to calculate the aspect ratio of component (B) or component (B'). [η]: intrinsic viscosity, f: aspect ratio

[0096] Of the components (B) and (B') listed in the table, the naturally occurring clay minerals (Kunipia G4, Kunipia F, Wenger HV, Wenger Next NC, and kaolin) were subjected to the following washing procedure before measuring the aspect ratio. The clay minerals were washed twice with a 1M aqueous solution of sodium acetate (pH 5.0) to dissolve and remove carbonates, and then centrifuged to remove the supernatant. Next, the clay minerals were washed three times with a 2N aqueous solution of NaCl to remove all of the interlayer cations of the clay minerals. ＋ The supernatant was removed by centrifugation again, and the mixture was washed three times with 70% isopropyl alcohol aqueous solution. After filtration through a membrane filter (Omnipore Membrane Filters 1.0 μm JA), the clay mineral cake was air-dried and crushed in a mortar before use in the measurement.

[0097] Furthermore, for clay minerals (Laponite XLS, kaolin, PDM-40L) whose aqueous dispersions have viscosities that are almost identical to that of 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, it was not possible to measure the aspect ratio using the above method for clays that are insoluble in water, such as organically modified clays (Moistnite WO, Sumecton SAN-P).

[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 in small amounts in several batches so as not to contact the wall 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 was read from the scale. The test was performed three times, and the average value is shown in the table as "water swelling degree (mL / 2 g)." Note that the water swelling degree could not be measured for materials that are not compatible with water, such as organically modified clays (Moistnite WO, Sumecton SAN-P).

[0099] (Measurement of storage modulus G' of composition) Dynamic viscoelasticity was measured for each aqueous body composition. Using a rheometer ("MCR502" manufactured by Anton Paar), the storage 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 in the flat region on the measurement chart, is 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 (No. 1, Φ70 mm, manufactured by ADVANTEC) and allowed to dry overnight. 20 g of silica was placed as a moisture absorbent in a moisture permeability test cup (Φ60 mm, capacity 40 mL), and the cup was covered with the above-mentioned filter paper. After measuring the initial weight of the filter paper + cup, the cup was placed in a constant temperature and humidity chamber (SH-262, manufactured by esspec) set at a temperature of 35°C and a humidity of 40%, and the weights of the filter paper + cup were measured after 1 hour, 2 hours, and 3 hours. The value obtained by subtracting the initial weight of the filter paper + cup from the weight of the filter paper + cup at each time was taken as the moisture absorption amount (g) at each time. The slope of the linear approximation line when the moisture absorption amount is plotted on the vertical axis and time on the horizontal axis was taken as the water vapor transmission amount per unit time W １ (g / hr). In addition, the water vapor permeation rate W ０The water vapor permeability (g / hr) was measured, and the reduction rate (%) of water vapor permeability was calculated using the following formula (1), and the average value of N=2 was shown in the table. The larger the reduction rate (%) of water vapor permeability, the higher the water vapor barrier property in a low humidity environment. Reduction rate (%) of water vapor permeability = {1 - (W １ / W ０ ) x 100 (1)

[0101] (Environmental Response) The reduction rate of the water vapor transmission rate was measured in the same manner under conditions of a temperature of 35°C and a humidity of 80%, and the value calculated from the following formula (2) was taken as the environmental response. A larger value indicates a higher humidity response and a better result, and in this example, a value of 40% or more is preferred. Environmental Response (%) = (reduction rate of water vapor transmission rate at a humidity of 40%) - (reduction rate of water vapor transmission rate at a humidity of 80%) (2)

[0102] (Evaluation of Water Resistance of Film) 0.5 g of each aqueous body composition was applied to a Teflon (registered trademark) sheet and dried overnight to obtain a dry film. The obtained dry film was floated in a petri dish containing ion-exchanged water and left to stand for 12 hours. After standing, films that did not dissolve and maintained their shape were given a rating of A, and films that at least partially dissolved were given a rating of B, as shown in the table.

[0103] Table 1 shows the water swelling degrees and aspect ratios of the components (B) and (B') used in the examples and comparative examples.

[0104] Examples 1 to 36 and 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 the components listed in the table were mixed using the following procedure. A disper mixer was used as the mixing device. First, the remaining amount of water (chloroform in Comparative Examples 16 and 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, and then an aqueous solution of component (C) was further added in Examples 18 to 25, and an aqueous solution of component (E) was added in Examples 26 to 36 and stirred, to obtain an aqueous body composition for each example. Using the obtained compositions, various evaluations were performed using the methods described above. The results are shown in Table 2 below.

[0105]

[0106]

[0107]

[0108]

[0109]

[0110]

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

[0112] <Component (A'): Anionic polymer other than component (A)> *9: Carrageenan SC-67(N): manufactured by San-Ei Gen F.F.I. Co., Ltd. *10: Polyvinyl sulfonic acid: manufactured by Polysciences, Inc., active content 25% *11: Jurrimer AC-10SH: manufactured by Toagosei Co., Ltd., active content 40% *12: Kimica Argin I-3: manufactured by Kimica Co., Ltd. *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: Wenger HV: manufactured by Hojun Co., Ltd., average particle size 464 nm * 18: Wenger Next Nc: manufactured by Hojun Co., Ltd., average particle size 759 nm * 19: NTS-5: manufactured by Topy Industries Co., Ltd., average particle size 580 nm

[0114] <Component (B'): Minerals other than component (B)> * 20: Sumecton-SA: Manufactured by Kunimine Kogyo Co., Ltd., average particle size 108 nm * 21: Sumecton-ST: Manufactured by Kunimine Kogyo Co., Ltd., average particle size 77 nm * 22: Sumecton-SWN: Manufactured by Kunimine Kogyo 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: Moistonite WO: Manufactured by Kunimine Kogyo Co., Ltd. * 26: Sumecton-SAN-P: Manufactured by Kunimine Kogyo Co., Ltd. * 27: PDM-40L: Manufactured by Topy Industries Co., Ltd., average particle size 1023 nm

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

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

[0117] The above table shows that the film formed by the aqueous composition for body use of the present invention has high water vapor barrier properties and environmental responsiveness in low humidity environments. Furthermore, a comparison of Examples 18 and 19 with Example 1 shows 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]

[0120]

[0121] The ingredients listed in Tables 8 and 9 are as follows. The blending amounts (mass%) listed in Tables 8 and 9 are the amounts of the active ingredients of each ingredient. *3: SEPINOV EMT10: manufactured by SEPIC, active ingredient content 89.3% *15: Kunipia G4: manufactured by Kunimine Industries Co., Ltd., average particle size 385 nm *31: SEPIGEL305: manufactured by SEPIC, active ingredient content 40%

[0122] According to the present invention, there is provided an aqueous composition for personal use that can form a film that exhibits high water vapor barrier properties in low-humidity environments and exhibits water vapor release properties in high-humidity environments. The composition has film-forming properties and can be used as a variety of cosmetic compositions.

Claims

1. An aqueous composition for the body comprising (A) an anionic polymer having a sulfonic acid group or a sulfate group, the viscosity of which in a 2% by weight aqueous solution at 25°C is 5,000 mPa·s or more, (B) one or more members 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, wherein the storage modulus of the composition, 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%, is 60 Pa or more and 5,000 Pa or less.

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. An aqueous composition for personal use according to claim 1 or 2, wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 0.2 or more and 20 or less.

4. An aqueous composition for personal use according to claim 1 or 2, wherein the content of said component (A) in said composition is 0.1% by mass or more and 10% by mass or less.

5. An aqueous composition for personal use according to claim 1 or 2, wherein the component (A) comprises one or more members 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): 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 body composition according to claim 1 or 2, further comprising (C) a cationic polymer.

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

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

9. The aqueous body care composition 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 a 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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