Body water composition

Abstract

The present invention is a water-based composition for the body containing the following components: (A) an anionic polymer having a viscosity of 5,000 mPa·s or more at 25°C and having sulfonic acid or sulfuric acid groups in a 2% by mass aqueous solution; (B) one or more selected from water-swellable clay minerals and water-swellable mica with an aspect ratio of 150 or more; and water; and (1) the storage modulus of the above composition, as measured by dynamic viscoelasticity determination at 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; or, the present invention is a water-based composition for the body containing the above components, and (2) the content of the above component (B) is 0.01% by mass or more and 10% by mass or less, and the mass ratio of the above component (A) to the above component (B) [(A) / (B)] is 0.2 or more and 20 or less.

Description

Technical Field

[0001] This invention relates to a water-based composition for the body. Background Technology

[0002] As a method to impart various properties such as luster and pleasant feel to keratin substances such as skin and hair, there is a known technique for forming a cosmetic film on the surface of keratin substances.

[0003] From the viewpoint of balancing film-forming properties and ease of integration with the skin, water-soluble polymers are used in film-forming cosmetics for the skin (for example, see Patent Documents 1-3).

[0004] International Publication No. 2016 / 157869 (Patent Document 1) describes a solid powder cosmetic containing powder, acrylic polymer, and water-swellable clay minerals, which has excellent drop strength, smooth feel, and excellent adhesion.

[0005] Japanese Patent Application Publication No. 2019-89744 (Patent Document 2) discloses the following: an emulsion composition with a standard deviation of 0.5 or more in emulsion particle size has a sufficiently thick feel and a perceptible sense of variation, and is smooth enough to achieve soft extensibility. Furthermore, it is also described that the emulsion composition contains a hydrogel forming agent, organically modified clay minerals, etc.

[0006] Japanese Patent Application Publication No. 2019-156735 (Patent Document 3) discloses the following: an oil-in-water cosmetic composition for preventing separation exhibits good stability by preventing separation, and the oil-in-water cosmetic composition for preventing separation is characterized by containing a compound that is water-soluble through neutralization as an active ingredient. It also describes that the cosmetic composition contains a gelling agent, water, and powder components. Summary of the Invention

[0007] The present invention relates to the following methods.

[0008] [1] A water-based composition for the body, comprising: (A) an anionic polymer having a viscosity of 5,000 mPa·s or more at 25°C and having sulfonic acid or sulfuric acid groups in a 2% by mass aqueous solution; (B) one or more selected from water-swellable clay minerals and water-swellable mica with an aspect ratio of 150 or more; and water.

[0009] The storage modulus of the above composition, as determined by dynamic viscoelasticity testing at a temperature of 25°C, a frequency of 2Hz, and a strain of 0.01%, is 60 Pa or more and 5,000 Pa or less.

[0010] [2] A cosmetic composition comprising a water-based body composition as described in [1] above.

[0011] [3] A method of using a composition comprising the steps of applying a water-based body composition as described in [1] above, or a cosmetic composition as described in [2] above, to a keratin base to form a film. Detailed Implementation

[0012] It is known that harsh humidity environments can cause skin damage. For example, low humidity environments can cause dryness-related problems, while high humidity environments can lead to excessive swelling of the stratum corneum, making the skin less tolerant to irritants.

[0013] The stratum corneum of the skin has the function of regulating the amount of moisture evaporating or absorbing from the skin surface in response to the surrounding environment, thereby protecting the skin. However, in daily life, as we move from indoors where air conditioning is used to outdoors, human skin is repeatedly exposed to severe humidity changes. Therefore, the function of the stratum corneum cannot fully respond to humidity changes, leading to concerns about accumulated damage to the skin.

[0014] Therefore, the industry anticipates topical agents that can regulate the moisture content of the skin surface in response to the surrounding environment, similar to the stratum corneum, and inhibit skin damage in both low-humidity and high-humidity environments. Specifically, it is believed that the above objective can be achieved by a topical agent that enhances skin hydration by exhibiting water vapor barrier properties in low-humidity environments, and whose water vapor barrier properties decrease and convert to water vapor release properties in high-humidity environments, thus forming a film that does not hinder the release of water vapor from the stratum corneum. While previous techniques for forming hydrophobic films have imparted water vapor barrier properties to the skin, they have not demonstrated an environmental responsiveness such as the ability to adjust water vapor barrier properties according to humidity.

[0015] This invention relates to a water-based composition for the body that can form a film that exhibits high water vapor barrier properties in low humidity environments and water vapor release properties in high humidity environments.

[0016] The inventors have discovered that the above-mentioned problems can be solved by the following water-based composition for the body, which contains a specified anionic polymer, one or more selected from water-swellable clay minerals and water-swellable mica with an aspect ratio of a specified value or higher, and water, and the storage modulus is within a specified range.

[0017] According to the present invention, a water-based composition for the body can be provided, which can form a film exhibiting high water vapor barrier properties in low humidity environments and water vapor release properties in high humidity environments. This composition has film-forming properties and can be used as a variety of cosmetic compositions.

[0018] [definition]

[0019] In this specification, "water-based composition for body use" refers to a water-based composition used for treating the surface of the body, such as skin, hair, eyelashes, eyebrows, nails, and other keratinous substances. "Water-based composition" refers to a composition whose main component is water, preferably a composition with a water content of 50% by mass or more.

[0020] The water-based composition for the body of the present invention (hereinafter also simply referred to as "water-based composition" or "the composition of the present invention") is preferably a water-based composition for keratin substances, more preferably a water-based composition for skin or hair, and even more preferably a water-based composition for skin. "Keratin substances" as used herein refer to keratin substances that constitute body parts of humans and other animals, such as hair, skin, and nails.

[0021] In this specification, "containing ingredient X" also includes compound ingredient X.

[0022] In this specification, the water vapor barrier performance in low humidity environments is defined as the water vapor barrier performance at a relative humidity of 40%, and the water vapor barrier performance in high humidity environments is defined as the water vapor barrier performance at a relative humidity of 80%. In this invention, a high water vapor barrier performance at a relative humidity of 40% can be considered as "exhibiting high water vapor barrier performance in low humidity environments".

[0023] Furthermore, in the following description, the property of exhibiting water vapor barrier properties in low humidity environments and water vapor release properties in high humidity environments is sometimes referred to as "environmental responsiveness." In this specification, the greater the difference between the water vapor barrier properties at 40% relative humidity and those at 80% relative humidity, the higher the environmental responsiveness. Specifically, environmental responsiveness can be evaluated using the methods described in the examples.

[0024] [Water-based body composition]

[0025] The composition of the present invention is an aqueous composition containing: (A) an anionic polymer having a viscosity of 5,000 mPa·s or more at 25°C and having sulfonic acid or sulfuric acid groups in a 2% by mass aqueous solution, (B) one or more selected from water-swellable clay minerals and water-swellable mica with an aspect ratio of 150 or more, and water, and the storage modulus of the above composition, as measured by dynamic viscoelasticity determination at 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.

[0026] The composition of the present invention, having the above-described structure, can form a film that exhibits water vapor barrier properties in low humidity environments and water vapor release properties in high humidity environments.

[0027] The reason why the composition of the present invention achieves the above-mentioned effects is uncertain, but the following can be considered.

[0028] Anionic polymers, as component (A) and containing sulfonic acid or sulfuric acid groups, exhibit film-forming properties and are hydrophilic hydrogels. Therefore, triggered by moisture absorption, their properties change, allowing the formation of films that exhibit environmental responsiveness. However, there are limitations to using anionic polymers alone to improve water vapor barrier properties in low-humidity environments.

[0029] Component (B) is a tabular mineral with a high aspect ratio. If component (B) is added to component (A) to form a film, the tabular surfaces of component (B) are dispersed within the film in a manner approximately parallel to the film surface. Furthermore, when water vapor permeates along the thickness direction of this film, a so-called "maze effect" is observed, where the permeation path of water vapor is lengthened due to the presence of component (B). This maze effect enhances water vapor barrier properties. Because component (B) has a high aspect ratio, it is believed to more effectively exhibit the water vapor barrier properties caused by the maze effect.

[0030] On the other hand, if component (B) condenses in the film, sufficient water vapor barrier properties based on the labyrinth effect cannot be obtained. However, since component (A) is anionic and component (B) is also negatively charged, charge repulsion occurs between component (A) and component (B), which can inhibit the condensation of component (B). Furthermore, since component (B) is water-swellable, it has a high affinity for aqueous compositions, and therefore it is considered unlikely to condense in the formed film.

[0031] In addition, if the viscosity of a 2% by mass aqueous solution of component (A) at 25°C is above a specified value, and the storage modulus of the obtained composition is within a specified range, it is considered that defects are less likely to occur in the labyrinth structure of the formed film, and the water vapor barrier properties can be further improved.

[0032] Furthermore, since both components (A) and (B) are hydrophilic, the film containing components (A) and (B) is sensitive to ambient humidity and will absorb moisture and swell in high humidity environments. Therefore, it is believed that in high humidity environments, as the film swells, the dispersion state of component (B) in component (A) changes, creating defects in the labyrinth structure of the film and thus failing to exhibit water vapor barrier properties, thereby altering its water vapor release properties.

[0033] <Ingredient (A): Anionic polymer>

[0034] The component (A) is an anionic polymer having a viscosity of 5,000 mPa·s or higher at 25°C when it is a 2% by mass aqueous solution, and having sulfonic acid groups or sulfuric acid groups, preferably an anionic polymer having sulfonic acid groups. It should be noted that at least a portion of the sulfonic acid groups or sulfuric acid groups may optionally be neutralized to present a salt state.

[0035] The anionic polymer that is component (A) refers to a polymer that has sulfonic acid groups or sulfate groups as anionic groups and is negatively charged as a whole.

[0036] From the viewpoints of film formation, improving water vapor barrier properties in low humidity environments, and improving environmental responsiveness, the viscosity of a 2% by mass aqueous solution of component (A) at 25°C is 5,000 mPa·s or more, preferably 5,500 mPa·s or more, more preferably 6,000 mPa·s or more, even more preferably 10,000 mPa·s or more, even more preferably 30,000 mPa·s or more, even more preferably 50,000 mPa·s or more, even more preferably 70,000 mPa·s or more, and preferably 200,000 mPa·s or less, more preferably 150,000 mPa·s or less, and even more preferably 100,000 mPa·s or less. Furthermore, the viscosity of a 2% by mass aqueous solution of component (A) at 25°C is 5,000 mPa·s or more, preferably 5,000 mPa·s or more and 200,000 mPa·s or less, more preferably 5,500 mPa·s or more and 150,000 mPa·s or less, even more preferably 6,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 10,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 30,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 50,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 70,000 mPa·s or more and 100,000 mPa·s or less.

[0037] The viscosity of a 2% by mass aqueous solution of component (A) can be determined by the method described in the examples.

[0038] From the viewpoints of film formation, improving water vapor barrier properties in low humidity environments, and improving environmental responsiveness, component (A) preferably includes one or more of the following: (A1) anionic polysaccharides having sulfonic acid groups or sulfate groups, and (A2) anionic polymers having structural units represented by the following general formula (1).

[0039] [Chemical Formula 1]

[0040]

[0041] In equation (1), R 1 M is a hydrogen atom or a methyl group, and M is a hydrogen atom, an alkali metal, or ammonium.

[0042] (Component (A1): Anionic polysaccharides with sulfonic acid or sulfate groups)

[0043] Regarding the anionic polysaccharides that are components (A1), examples include natural polysaccharides and semi-synthetic polysaccharides derived from natural polysaccharides, and any of these may be used.

[0044] As for components that are natural polysaccharides (A1), examples include: carrageenan, chondroitin sulfate, keratin sulfate, dermatan sulfate, heparin, heparan sulfate, and their salts.

[0045] Regarding the component (A1) of the semi-synthetic polysaccharide, a cellulose derivative or starch derivative having a sulfonic acid group or a sulfate group is preferred, a cellulose derivative having a sulfonic acid group or a sulfate group is more preferred, and a cellulose derivative having a sulfonic acid group is even more preferred.

[0046] As cellulose derivatives having a sulfonic acid group, cellulose derivatives having a sulfonic acid group and a hydrophobic group having 8 or more and 24 or less carbon atoms, preferably 12 or more and 22 or less carbon atoms, more preferably 18 or more and 22 or less carbon atoms, and even more preferably cellulose derivatives having a sulfonic acid group and an alkyl group having 8 or more and 24 or less carbon atoms, preferably 12 or more and 22 or less carbon atoms, more preferably 18 or more and 22 or less carbon atoms. Specific examples include stearoxy-PG hydroxyethyl cellulose sulfonic acid or its salts.

[0047] Examples of starch derivatives having sulfonic acid or sulfate groups include sulfated starch or its salts.

[0048] When component (A1) is a salt, examples of such salts include alkali metal salts such as sodium salts and potassium salts, and ammonium salts. From the point of view, alkali metal salts are preferred.

[0049] From the perspectives of film formation, improving water vapor barrier properties in low humidity environments, improving environmental responsiveness, and availability, the preferred component (A1) is 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 8 or more carbon atoms and 24 or fewer carbon atoms; even more preferably, a cellulose derivative having a sulfonic acid group and a hydrophobic group having 8 or more carbon atoms and 24 or fewer carbon atoms; even more preferably, one or more of stearoxy PG hydroxyethyl cellulose sulfonic acid or its salts; and even more preferably, sodium stearoxy PG hydroxyethyl cellulose sulfonate.

[0050] (Component (A2): An anionic polymer having the structural unit represented by general formula (1))

[0051] Component (A2) is an anionic polymer having the structural unit represented by the following general formula (1).

[0052] [Chemical Formula 2]

[0053]

[0054] In equation (1), R 1 M is a hydrogen atom or a methyl group, and M is a hydrogen atom, an alkali metal, or ammonium.

[0055] From the perspective of accessibility, R in general formula (1) 1 Hydrogen atoms are preferred, and M is preferably an alkali metal or ammonium, more preferably sodium or ammonium.

[0056] Component (A2) may be a polymer containing structural units other than those represented by the general formula (1) above. Examples of such other structural units include those derived from vinylpyrrolidone, (meth)acrylic acid or its salts, alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, and acrylamides such as N,N-dimethylacrylamide. It should be noted that in this specification, "(meth)acrylic acid" refers to acrylic acid or methacrylic acid, and "(meth)acrylate" refers to acrylate or methacrylate.

[0057] Alternatively, component (A2) may also be a cross-linked polymer.

[0058] Specific examples of component (A2) include: sodium polyacrylamide dimethyl taurate, ammonium polyacrylamide dimethyl taurate, (sodium acrylate / sodium acrylamide dimethyl taurate) copolymer, (hydroxyethyl acrylate / sodium acrylamide dimethyl taurate) copolymer, (ammonium acrylamide dimethyl taurate / VP) copolymer, polyacrylate crosspolymer-6 (ammonium acrylamide dimethyl taurate, dimethacrylamide, lauryl methacrylate and lauryl alcohol polyether-4 methacrylate), (ammonium acrylamide dimethyl taurate / behenol polyether-25 methacrylate) crosspolymer, etc., and one or more of these may be used.

[0059] Of the above, from the viewpoints of film formation, improving water vapor barrier properties in low humidity environments, improving environmental responsiveness, and accessibility, it is preferred to select one or more of sodium polyacrylamide dimethyl taurate, (sodium acrylate / sodium acrylamide dimethyl taurate) copolymer, (hydroxyethyl acrylate / sodium acrylamide dimethyl taurate) copolymer, (ammonium acrylamide dimethyl taurate / VP) copolymer, and polyacrylate crosslinker-6.

[0060] From the perspectives of film formation, improving water vapor barrier properties in low humidity environments, improving environmental responsiveness, and availability, component (A) is preferably selected from one or more of sodium polyacrylamide dimethyl taurate, sodium stearoxy PG hydroxyethyl cellulose sulfonate, (sodium acrylate / sodium acrylamide dimethyl taurate) copolymer, (hydroxyethyl acrylate / sodium acrylamide dimethyl taurate) copolymer, (ammonium acrylamide dimethyl taurate / VP) copolymer, and polyacrylate crosspolymer-6.

[0061] As component (A), commercially available anionic polymers may also be used. Specific examples include: "SPS-S-SA" (sodium stearoxy PG hydroxyethyl cellulose sulfonate) manufactured by Kao Corporation; "Simulgel EG QD" ((sodium acrylate / sodium acryloyl dimethyl taurate) copolymer) manufactured by SEPPIC Corporation; "SEPINOV EMT10", "Sepiplus S", "Simulgel FL", "Simulgel NS" (all of which are (hydroxyethyl acrylate / sodium acryloyl dimethyl taurate) copolymers); "Sepimax zen" (polyacrylate crosspolymer-6); "Aristoflex AVC" ((ammonium acryloyl dimethyl taurate / VP) copolymer) manufactured by Clariant Japan Corporation; "Aristoflex Silk" ((sodium polyacryloyl dimethyl taurate); "Aristoflex HMB" ((ammonium acryloyl dimethyl taurate / behenol polyether-25 methacrylate) crosspolymer) manufactured by Clariant Japan Corporation; and so on.

[0062] <Component (B): Water-swellable clay minerals with an aspect ratio of 150 or higher and water-swellable mica>

[0063] Component (B) is one or more selected from water-swellable clay minerals and water-swellable mica with an aspect ratio of 150 or higher.

[0064] The water swelling property mentioned here refers to the property of swelling when dispersed in water. More specifically, it refers to a water swelling degree of 40 mL / 2 g or more as determined by the following test methods.

[0065] (Experimental Methods)

[0066] Add 100 mL of ion-exchanged water to a 100 mL graduated cylinder. Add 2 g of component (B) gradually in several small amounts, ensuring it doesn't adhere to the cylinder walls. After all component (B) has settled naturally to the bottom of the cylinder, read the volume (mL) of component (B) after 24 hours from the graduation mark. Take the average of the three tests as the water swelling degree of component (B) (mL / 2g).

[0067] From the perspectives of inhibiting the aggregation of component (B), improving water vapor barrier properties in low humidity environments, and enhancing environmental responsiveness, 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. There is no particular upper limit, but it is generally 90 mL / 2g or less, preferably 80 mL / 2g or less, and even more preferably 75 mL / 2g or less. Furthermore, 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.

[0068] From the perspective of improving water vapor barrier properties in low-humidity environments and improving environmental responsiveness, the aspect ratio of component (B) is 150 or higher, preferably 160 or higher, more preferably 180 or higher, and even more preferably 190 or higher. There is no particular upper limit, but it is generally 2000 or lower, preferably 1000 or lower, more preferably 600 or lower, even more preferably 500 or lower, and even more preferably 400 or lower. Furthermore, the aspect ratio of component (B) is 150 or higher, preferably 150 or higher and 2000 or lower, more preferably 150 or higher and 1000 or lower, even more preferably 160 or higher and 600 or lower, even more preferably 180 or higher and 500 or lower, and even more preferably 190 or higher and 400 or lower.

[0069] The aspect ratio of component (B) can be determined according to the method described in Clay Science Vol. 50 No. 3 162-174 (2012), specifically by the method described in the examples.

[0070] From the perspectives of film formation, improving water vapor barrier properties in low-humidity environments, and enhancing 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 preferably 2000 nm or less, more preferably 1500 nm or less, and even more preferably 1000 nm or less. Furthermore, 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.

[0071] The average particle size of component (B) can be determined by dynamic light scattering (DLS).

[0072] Component (B) is selected from one or more clay minerals and mica that are water-swellable and have an aspect ratio of 150 or higher. Hereinafter, clay minerals and mica are sometimes referred to collectively as "minerals".

[0073] The aforementioned water-swellable clay minerals have cations (Na+) in their interlayer. + K + Mg 2+ Ca 2+ (etc.), and those that absorb water and swell, specifically, include: smectite, bentonite, montmorillonite, aluminum montmorillonite, chloromontmorillonite, soapstone, magnesia, lithium montmorillonite, etc., and one or more of these can be used.

[0074] Water-swellable mica is mica containing cations (Na+) in the interlayer of mica. + K + Mg 2+ Ca 2+ Examples of substances that swell upon absorbing water include sodium tetrasilica.

[0075] Component (B) may be a surface-treated mineral, but from the viewpoint of water swelling, it is preferred to have a mineral that has not been surface-treated or has been hydrophilically treated, and even more preferably a mineral that has not been surface-treated.

[0076] From the viewpoint of improving water vapor barrier properties in low humidity environments and improving environmental responsiveness, component (B) is preferably selected from one or more of water-swellable bentonite, water-swellable montmorillonite, and water-swellable mica, and more preferably from one or more of water-swellable bentonite, water-swellable montmorillonite, and sodium tetrasilica.

[0077] As component (B), commercially available products may also be used. Specific examples include: "Kunipia G4" and "Kunipia F" (both are purified bentonite (montmorillonite)) manufactured by KUNIMINE INDUSTRIES Co., Ltd., "Bengel HV" and "Bengel Next Nc" (both are bentonite) manufactured by Ho Jun Co., Ltd., and "NTS-5" (sodium tetrasilicic mica) manufactured by TOPY INDUSTRIES Co., Ltd.

[0078] <Content>

[0079] From the viewpoints of film formation 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, even more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, and even more preferably 1.2% by mass or more. Furthermore, from the viewpoints of improving water vapor barrier properties and coatability in low humidity environments, 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, and even more preferably 3.0% by mass or less. Moreover, 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, even more preferably 0.5% by mass or more and 8.0% by mass or less, even more preferably 1.0% by mass or more and 5.0% by mass or less, and even more preferably 1.2% by mass or more and 3.0% by mass or less.

[0080] From the viewpoint of film formation and improving water vapor barrier properties 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, further preferably 0.1% by mass or more, and even more preferably 0.2% by mass or more. Furthermore, from the viewpoint of improving environmental responsiveness and improving the dispersibility of component (B), it is preferably 10% by mass or less, more preferably 8.0% by mass or less, further 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. Moreover, 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, further 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.

[0081] From the viewpoint of film formation and improved environmental responsiveness, 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, further preferably 0.5 or more, even more preferably 0.8 or more, even more preferably 1.0 or more, and even more preferably 1.5 or more. Furthermore, from the viewpoint of improving water vapor barrier properties in low humidity environments, it is preferably 20 or less, more preferably 18 or less, even more preferably 15 or less, even more preferably 12 or less, and even more preferably 10 or less. Moreover, 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, even more preferably 0.8 or more and 18 or less, even more preferably 1.0 or more and 15 or less, and even more preferably 1.5 or more and 10 or less.

[0082] From the perspectives of film formation, improving water vapor barrier properties in low-humidity environments, and improving environmental responsiveness, the total content of component (A) and component (B) in the composition is preferably 0.2% by mass or more, more preferably 0.5% by mass or more, further preferably 1.0% by mass or more, even more preferably 1.5% by mass or more, and even more preferably 2.0% by mass or more. Furthermore, from the perspectives of improving formulation 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, even more preferably 5.0% by mass or less, and even more preferably 4.0% by mass or less. Moreover, 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, even more preferably 1.5% by mass or more and 5.0% by mass or less, and even more preferably 2.0% by mass or more and 4.0% by mass or less.

[0083] <Component (C): Cationic polymer>

[0084] From the viewpoint of improving the water resistance of the formed film, the composition of the present invention may further contain (C) a cationic polymer. Component (C) is a polymer that can form a polyionic complex through interaction with component (A). The film containing the polyionic complex has a cross-linked structure and is hydrophobic, thus forming a film with high water resistance.

[0085] The cationic polymer used as component (C) is preferably a polymer having cationic groups and being positively charged on a total charge scale. However, to the extent that it does not impair the effects of the present invention, component (C) may also have anionic groups, nonionic groups, or amphoteric groups such as betaine groups in addition to cationic groups.

[0086] From the viewpoint of improving the water resistance of the formed film, component (C) preferably includes (C1) a cationic polymer containing the structural unit represented by the following general formula (2) and (C2) a cationic polymer selected from cationic polysaccharides.

[0087] [Chemical Formula 3]

[0088]

[0089] In equation (2), R 11 R is a hydrogen atom or a methyl group. 12 ~R 14 Each is an alkyl group having 1 or more but less than 4 carbon atoms. X is -O- or -NH-, and m is 1 or more but less than 4 carbon atoms.

[0090] (Component (C1))

[0091] Component (C1) is a cationic polymer containing the structural unit represented by the general formula (2) above.

[0092] R in general formula (2) 11 Preferred methyl group, R 12 ~R 14 Alkyl groups having 1 or more but less than 3 carbon atoms are preferred, methyl or ethyl groups are more preferred, and methyl groups are even more preferred.

[0093] In general formula (2), X is preferably -O-, and m is preferably 1 or more and 3 or less, more preferably 2 or more and 3 or less.

[0094] As the structural unit represented by general formula (2), one or more structural units can be selected from structural units derived from methacryloyl ethyl trimethylammonium salt, structural units derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate, and structural units derived from methacrylamidopropyl trimethylammonium salt, preferably one or more structural units selected from structural units derived from methacryloyl ethyl trimethylammonium salt and structural units derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate.

[0095] In the component (C1), from the viewpoint of improving the water resistance of the formed film, the content of the structural unit represented by the above general formula (2) is preferably 8.0 mol% or more and 100 mol% or less among all the structural units constituting the component (C1).

[0096] Component (C1) may be a polymer containing structural units other than those represented by the general formula (2) above. Examples of such other structural units include structural units derived from vinyl monomers such as vinylpyrrolidone, amphoteric monomers such as (meth)acryloylethyl dimethyl betaine, alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, and acrylamides such as N,N-dimethylacrylamide. Alternatively, component (C1) may be a crosslinked polymer formed by crosslinking polyethylene glycol di(meth)acrylate or the like.

[0097] Suitable examples of cationic polymers comprising the structural units represented by the above general formula (2) include one or more selected from the following: methyl methacryloyl ethyl trimethylammonium chloride polymer (polyquaternium-37), methyl methacryloyl ethyl dimethyl betaine-methyl methacryloyl ethyl trimethylammonium chloride-methoxy polyethylene glycol methacrylate copolymer (polyquaternium-49), methyl methacryloyl ethyl dimethyl betaine-methyl methacryloyl ethyl trimethylammonium chloride-2-hydroxyethyl methacrylate copolymer (polyquaternium-48), and N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-dimethacrylate polyethylene glycol ester copolymer (polyquaternium-52).

[0098] From the viewpoint of improving the water resistance of the formed film, one or more of the following are preferred: methyl methacryloyl ethyl trimethylammonium chloride polymer (polyquaternium salt-37) and N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-dimethacrylate polyethylene glycol copolymer (polyquaternium salt-52).

[0099] Commercially available polymers may also be used as components (C1). Specific examples include: "SOFCARE KG-101W-E" (polyquaternium-52), "SOFCARE KG-301W" (polyquaternium-52), "PolymerKG30" (polyquaternium-52), "KP Polymer E" (polyquaternium-37) manufactured by Kao Corporation, and "Cosmedia Ultragel 300" (polyquaternium-37) manufactured by BASF Japan Co., Ltd.

[0100] (Component (C2))

[0101] Component (C2) is a cationic polysaccharide. In this specification, "cationic polysaccharide" refers to a modified polysaccharide with cationic groups introduced onto its polymer backbone.

[0102] Specific examples of cationic polysaccharides include: cationic guar gum, cationic tara gum, cationic fenugreek gum, cationic locust bean gum, and other cationic galactomannans; cationic polymers with a cellulose backbone, such as cationic cellulose, cationic hydroxyethyl cellulose, cationic hydroxypropyl cellulose, and cationic carboxymethyl cellulose; and cationic starch, etc.

[0103] From the viewpoint of improving the water resistance of the formed film, the cationic polysaccharide is preferably selected from one or more of cationic galactomannan and cationic polymers having a cellulose backbone, more preferably cationic polymers having a cellulose backbone, further preferably cationic hydroxyethyl cellulose, and even more preferably hydroxyethyl cellulose hydroxypropyltrimethylammonium chloride ether (also known as: o-[2-hydroxy-3-(trimethylammonium)propyl]hydroxyethyl cellulose, polyquaternium salt-10).

[0104] As a component (C2), commercially available polymers may also be used. Specific examples include: cationic guar gum from the "Jaguar C" series manufactured by Solvay Co., Ltd., and the "Rubbol Gum" series manufactured by DSP GOKYO FOOD & CHEMICAL Co., Ltd.; cationic cellulose from the "Poiz C" series manufactured by Kao Corporation and the "Catinal" series manufactured by Toho Chemical Co., Ltd.

[0105] From the viewpoint of improving the water resistance of the formed film, component (C) is preferably selected from one or more of the following: methyl methacryloyl ethyl trimethylammonium chloride polymer (polyquaternium salt-37), N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-dimethacrylate polyethylene glycol copolymer (polyquaternium salt-52), and hydroxyethyl cellulose hydroxypropyl trimethylammonium chloride ether (polyquaternium salt-10).

[0106] When the composition contains component (C), from the viewpoint of improving the water resistance of the formed film, the content of component (C) in the composition is preferably 0.02% by mass or more, more preferably 0.05% by mass or more, further preferably 0.1% by mass or more, and even more preferably 0.2% by mass or more. Furthermore, from the viewpoint of improving the stability of the formulation, it is preferably 10% by mass or less, more preferably 8.0% by mass or less, further 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. Moreover, 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, further 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.

[0107] From the viewpoint of improving the water resistance of the formed film, the total content of component (A) and component (C) in the composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, even more preferably 1.2% by mass or more, and even more preferably 1.5% by mass or more. Furthermore, from the viewpoint of improving the stability of the formulation, it is preferably 15% by mass or less, more preferably 10% by mass or less, even more preferably 5.0% by mass or less, and even more preferably 3.5% by mass or less. Furthermore, the total content of component (A) and component (C) in the composition is preferably 0.1% by mass or more and 15% by mass or less, more preferably 0.2% by mass or more and 10% by mass or less, even more preferably 0.3% by mass or more and 5.0% by mass or less, even more preferably 0.5% by mass or more and 5.0% by mass or less, even more preferably 1.0% by mass or more and 5.0% by mass or less, even more preferably 1.2% by mass or more and 3.5% by mass or less, and even more preferably 1.5% by mass or more and 3.5% by mass or less.

[0108] From the viewpoint of improving the water resistance of the formed film, the mass ratio of the total amount of component (A) and component (C) in the composition to component (B) [{(A) + (C)} / (B)] 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 stability of the formulation, it is preferably 10.0 or less, more preferably 5.0 or less, and even more preferably 3.0 or less. Furthermore, 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.

[0109] <Ingredient (D): Glycerin or its condensate>

[0110] From the viewpoints of improving stability of the compound, improving water vapor barrier properties in low humidity environments, and improving environmental responsiveness, the compositions of the present invention may further contain glycerol or its condensate as component (D).

[0111] Examples of glycerol or its condensates include glycerol, diglycerol, polyglycerol, etc., and one or more of these may be used.

[0112] In the above, glycerol or its condensate is preferably selected from one or more of glycerol and diglycerol, more preferably glycerol.

[0113] When the composition of the present invention contains component (D), from the viewpoints of improving complexation stability, improving water vapor barrier properties in low humidity environments, and improving environmental responsiveness, the content of component (D) in the composition is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, further preferably 0.5% by mass or more, and even more preferably 1.0% by mass or more. Furthermore, from the viewpoint of improving complexation stability, it is preferably 20% by mass or less, more preferably 15% by mass or less, further preferably 10% by mass or less, and even more preferably 5.0% by mass or less. Moreover, 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, further preferably 0.5% by mass or more and 10% by mass or less, and even more preferably 1.0% by mass or more and 5.0% by mass or less.

[0114] <Component (E): Nonionic polymer>

[0115] From the viewpoints of improving water vapor barrier properties in low-humidity environments, improving environmental responsiveness, and ensuring stability when preparing cosmetic compositions in combination with surfactants or oily components, the compositions of the present invention may further contain a nonionic polymer as a component (E). In this specification, "nonionic polymer" refers to a polymer that substantially does not possess cationic, anionic, or amphoteric groups, which are ionic groups.

[0116] From the perspective of improving water vapor barrier properties in low humidity environments and improving environmental responsiveness, component (E) is preferably a nonionic polymer with a viscosity of 1,500 mPa·s or higher at 25°C in a 2% by mass aqueous solution.

[0117] From the viewpoints of film formation, improving water vapor barrier properties in low humidity environments, and improving environmental responsiveness, the viscosity of a 2% by mass aqueous solution of component (E) at 25°C is more preferably 5,000 mPa·s or more, further preferably 10,000 mPa·s or more, even more preferably 15,000 mPa·s or more, even more preferably 20,000 mPa·s or more, and 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, even more preferably 500,000 mPa·s or less, even more preferably 300,000 mPa·s or less, even more preferably 200,000 mPa·s or less, and even more preferably 150,000 mPa·s or less. Furthermore, 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, even more preferably 10,000 mPa·s or more and 600,000 mPa·s or less, even more preferably 15,000 mPa·s or more and 500,000 mPa·s or less, even more preferably 15,000 mPa·s or more and 300,000 mPa·s or less, even more preferably 20,000 mPa·s or more and 200,000 mPa·s or less, even more preferably 20,000 mPa·s or more and 150,000 mPa·s or less.

[0118] The viscosity of a 2% by mass aqueous solution of component (E) can be determined by the method described in the examples.

[0119] As a component (E), examples include polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamide, polymers containing structural units derived from (meth)acrylates, nonionic polysaccharides, etc., and one or more of these may be used.

[0120] It should be noted that in this specification, "(meth)acrylic acid" refers to acrylic acid or methacrylic acid, and "(meth)acrylate" refers to acrylate or methacrylate.

[0121] 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)acrylate, vinylpyrrolidone, vinyl acetate, and vinyl methyl ether.

[0122] Examples of N-substituted (meth)acrylamides include dimethyl (meth)acrylamide, diethyl (meth)acrylamide, and other dialkyl (meth)acrylamides.

[0123] Examples of N-unsubstituted (meth)acrylamides include acrylamide and methacrylamide.

[0124] Examples of (meth)acrylates include: alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates, and alkyl (meth)acrylate ethers.

[0125] Specific examples of polymers comprising structural units derived from N-substituted or unsubstituted (meth)acrylamide include: polyacrylamide, polymethacrylamide, polydimethacrylamide, polydiethylacrylamide, ((meth)acrylamide / dimeth(meth)acrylamide) copolymer, (vinylpyrrolidone / (meth)acrylamide) copolymer, ((meth)acrylamide / alkyl acrylate) copolymer, (dimethacrylamide / alkyl acrylate) copolymer, (dimethacrylamide / hydroxyethyl acrylate / methoxyethyl acrylate) copolymer, etc. Among these, it is preferable to include one or more selected from polyacrylamide, polymethacrylamide, polydimethacrylamide, polydiethylacrylamide, and ((meth)acrylamide / dimeth(meth)acrylamide) copolymer, and more preferably polyacrylamide.

[0126] Examples of polymers containing structural units derived from (meth)acrylates include homopolymers of (meth)acrylates and copolymers of (meth)acrylates with nonionic monomers such as vinylpyrrolidone, vinyl acetate, and vinyl methyl ether. Examples of (meth)acrylates include alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates, and alkyl (meth)acrylate ethers. It should be noted that polymers containing structural units derived from N-substituted or unsubstituted (meth)acrylamides are excluded from the category of "polymers containing structural units derived from (meth)acrylates".

[0127] Specific examples of polymers containing structural units derived from (meth)acrylates include (vinylpyrrolidone / alkyl acrylate) copolymers, (hydroxyethyl acrylate / methoxyethyl acrylate) copolymers, etc.

[0128] Examples of nonionic polysaccharides include starch, cellulose, guar gum, tara gum, locust bean gum, glucomannan, and their derivatives. Among these, from the viewpoints of film formation, improving water vapor barrier properties in low-humidity environments, and enhancing environmental responsiveness, nonionic polysaccharides preferably include derivatives of nonionic polysaccharides, more preferably derivatives of nonionic polysaccharides having substituents containing alkyl groups with 8 or more carbon atoms, and even more preferably cellulose derivatives having substituents containing alkyl groups with 8 or more carbon atoms.

[0129] As a substituent comprising an alkyl group having 8 or more carbon atoms, preferred examples include: alkyl groups having 8 or more carbon atoms, hydroxyalkyl groups comprising an alkyl group having 8 or more carbon atoms, or hydroxyalkyl-alkyl ether groups comprising an alkyl group having 8 or more carbon atoms. Among these, one or more are preferably selected from alkyl groups having 8 or more carbon atoms and hydroxyalkyl-alkyl ether groups comprising an alkyl group having 8 or more carbon atoms, and more preferably from hydroxyalkyl-alkyl ether groups comprising an alkyl group having 8 or more carbon atoms.

[0130] As an alkyl group having 8 or more carbon atoms, an alkyl group having 8 or more carbon atoms and 22 or fewer carbon atoms is preferred, an alkyl group having 12 or more carbon atoms and 22 or fewer carbon atoms is more preferred, an alkyl group having 16 or more carbon atoms and 22 or fewer carbon atoms is even more preferred, and an alkyl group having 18 or more carbon atoms and 22 or fewer carbon atoms is still preferred.

[0131] Specific examples of alkyl groups having 8 or more carbon atoms include: straight-chain or branched octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, myristyl, pentadecyl, palmityl, heptadecanyl, stearyl, isostearyl, nonadecanyl, eicosyl, dodecyl, and benzyl, etc.

[0132] In the above, from the viewpoints of film formation, improving water vapor barrier properties in low humidity environments, and improving environmental responsiveness, the alkyl group having 8 or more carbon atoms is preferably selected from one or more of dodecyl, tridecyl, myristyl, pentadecyl, cetyl, heptadecanyl, stearyl, isostearyl, nonadecanyl, eicosyl, dodecyl, and benzyl, more preferably from one or more of cetyl, stearyl, isostearyl, eicosyl, dodecyl, and benzyl, and even more preferably from one or more of stearyl and benzyl.

[0133] In derivatives of nonionic polysaccharides having substituents containing alkyl groups having 8 or more carbon atoms, the nonionic polysaccharide that forms the parent compound by introducing substituents containing alkyl groups having 8 or more carbon atoms may have substituents containing short-chain alkyl groups having 3 or fewer carbon atoms. Specifically, it may also be a compound obtained by substituting one or more alkyl groups having 3 or fewer carbon atoms, hydroxyalkyl groups, and dihydroxyalkyl groups into an unsubstituted nonionic polysaccharide.

[0134] Furthermore, the nonionic polysaccharide that forms the matrix is ​​preferably a compound with a cellulose backbone. That is, the aforementioned "unsubstituted nonionic polysaccharide" is preferably cellulose.

[0135] Examples of compounds with a cellulose backbone that serve as the parent nonionic polysaccharide include: alkyl cellulose having only alkyl groups with 3 or fewer carbon atoms, hydroxyalkyl cellulose having hydroxyalkyl or dihydroxyalkyl groups, and hydroxyalkyl-alkyl cellulose having hydroxyalkyl or dihydroxyalkyl groups and alkyl groups with 3 or fewer carbon atoms.

[0136] Specific examples of alkyl cellulose that have only alkyl groups with 3 or fewer carbon atoms include: methyl cellulose, ethyl cellulose, propyl cellulose, methyl ethyl cellulose, methyl propyl cellulose, ethyl propyl cellulose, etc.

[0137] Specific examples of hydroxyalkyl cellulose having hydroxyalkyl or dihydroxyalkyl groups include: hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, dihydroxypropyl hydroxyethyl cellulose, dihydroxypropyl hydroxypropyl cellulose, etc., preferably selected from one or more of hydroxyethyl cellulose, hydroxypropyl cellulose, and dihydroxypropyl hydroxyethyl cellulose.

[0138] Specific examples of hydroxyalkyl-alkyl cellulose, which is a hydroxyalkyl or dihydroxyalkyl cellulose with an alkyl group having 3 or fewer carbon atoms, include: hydroxymethyl-methylcellulose, hydroxyethyl-methylcellulose, hydroxymethyl-propylcellulose, hydroxyethyl-methylcellulose, hydroxyethyl-ethylcellulose, hydroxyethyl-propylcellulose, hydroxypropyl-methylcellulose, hydroxypropyl-ethylcellulose, hydroxypropyl-ethylcellulose, hydroxypropyl-propylcellulose, dihydroxypropyl-hydroxyethyl-methylcellulose, dihydroxypropyl-hydroxypropyl-methylcellulose, etc.

[0139] Cellulose derivatives having substituents containing alkyl groups having 8 or more carbon atoms are more preferably compounds having substituents containing alkyl groups having 8 or more carbon atoms introduced into the aforementioned cellulose having hydroxyalkyl or dihydroxyalkyl groups.

[0140] Specific examples of compounds in which a substituent containing an alkyl group having eight or more carbon atoms is introduced into cellulose having a hydroxyalkyl or dihydroxyalkyl group include cetyl hydroxyethyl cellulose (such as "Polysurf67CS" manufactured by Ashland) and stearoxy PG hydroxyethyl cellulose (name indicated).

[0141] From the viewpoints of film formation, improving water vapor barrier properties in low humidity environments, and improving environmental responsiveness, component (E) preferably includes one or more polymers selected from structural units derived from N-substituted or unsubstituted (meth)acrylamide and nonionic polysaccharides.

[0142] From the perspectives of film formation, improving water vapor barrier properties in low humidity environments, improving environmental responsiveness, and availability, component (E) preferably includes one or more selected from polyacrylamide, polymethacrylamide, polydimethacrylamide, polydiethylacrylamide, ((meth)acrylamide / dimeth(meth)acrylamide) copolymer, and cellulose derivatives having a substituent containing an alkyl group having 8 or more carbon atoms. More preferably, it includes one or more selected from polyacrylamide, compounds in which a substituent containing an alkyl group having 8 or more carbon atoms is introduced into hydroxyalkyl cellulose having a hydroxyalkyl or dihydroxyalkyl group, and compounds in which a substituent containing an alkyl group having 8 or more carbon atoms is introduced into hydroxyalkyl-alkyl cellulose having a hydroxyalkyl or dihydroxyalkyl group and an alkyl group having 3 or fewer carbon atoms. More preferably, it includes one or more selected from polyacrylamide, cetyl hydroxyethyl cellulose, and stearoxy PG hydroxyethyl cellulose. Even more preferably, it includes one or more selected from polyacrylamide and stearoxy PG hydroxyethyl cellulose.

[0143] When the composition of the present invention contains component (E), from the viewpoint of film formation and improved environmental responsiveness, 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, even more preferably 0.5% by mass or more, even more preferably 0.7% by mass or more, even more preferably 1.0% by mass or more, and even more preferably 1.2% by mass or more. Furthermore, from the viewpoint of improving water vapor barrier properties and coatability in low humidity environments, 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, and even more preferably 3.0% by mass or less. Furthermore, 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, even more preferably 0.5% by mass or more and 8.0% by mass or less, even more preferably 0.7% by mass or more and 5.0% by mass or less, even more preferably 1.0% by mass or more and 5.0% by mass or less, and even more preferably 1.2% by mass or more and 3.0% by mass or less.

[0144] When the composition of the present invention contains component (E), from the viewpoint of film formation and improved environmental responsiveness, it is preferably 0.1 or more, more preferably 0.2 or more. The mass ratio of component (E) to component (A) in the composition [(E) / (A)] is further preferably 0.3 or more, even more preferably 0.5 or more, even more preferably 1.0 or more. From the viewpoint of improving complexation stability, it is preferably 10 or less, more preferably 5.0 or less, even more preferably 3.0 or less, even more preferably 2.0 or less, even more preferably 1.5 or less. Furthermore, 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, even more preferably 0.5 or more and 2.0 or less, even more preferably 1.0 or more and 1.5 or less.

[0145] From the viewpoint of film formation and improved environmental responsiveness, the mass ratio 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 viewpoint of improving water vapor barrier properties and improving formulation stability in low humidity environments, it is preferably 10.0 or less, more preferably 5.0 or less, and even more preferably 3.0 or less. Furthermore, 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.

[0146] <Water>

[0147] Since the composition of the present invention is an aqueous composition, it contains water. Deionized water or distilled water is preferred. It should be noted that, within the range that the stability of the composition is not compromised, tap water, groundwater, etc., which have been sterilized using hypochlorous acid, etc., may also be used.

[0148] From the viewpoint of preparing an aqueous composition and improving the stability of the formulation, 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 also be the remainder of components (A) and (B).

[0149] <Energy Storage Modulus>

[0150] From the viewpoints of film formation, improving water vapor barrier properties in low humidity environments, and improving environmental responsiveness, the storage modulus of the composition of the present invention, measured by dynamic viscoelasticity determination at a temperature of 25°C, a frequency of 2Hz, and a strain of 0.01%, is 60 Pa or more and 5,000 Pa or less. It is believed that if the storage modulus of the composition is within the above range, defects are less likely to occur in the labyrinth structure of the formed film, thereby improving water vapor barrier properties.

[0151] From the viewpoints of film formation, improving water vapor barrier properties in low humidity environments, and improving 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 formation, improving water vapor barrier properties in low humidity environments, and coating properties, it is preferably 4,000 Pa or less, more preferably 3,500 Pa or less, and even more preferably 3,000 Pa or less. Moreover, the storage modulus of the composition of the present invention, measured by dynamic viscoelasticity determination at a temperature of 25°C, a frequency of 2Hz, 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.

[0152] It should be noted that the storage modulus of the composition can be adjusted to the range specified above by adjusting the types, amounts, and proportions of each component. Furthermore, the storage modulus G' of the composition is a value obtained by measuring the storage modulus G' of strains from 0.001% to 100% using a rheometer (MCR502 manufactured by Anton Paar) at a temperature of 25°C and a measurement frequency of 2Hz.

[0153] The present invention also provides a water-based composition for the body, comprising:

[0154] (A) An anionic polymer having a viscosity of 5,000 mPa·s or higher at 25°C and containing sulfonic acid or sulfuric acid groups in a 2% by mass aqueous solution; (B) One or more selected from water-swellable clay minerals and water-swellable mica with an aspect ratio of 150 or higher; and water.

[0155] The content of the above-mentioned component (B) is 0.01% by mass or more and 10% by mass or less.

[0156] The mass ratio of component (A) to component (B) [(A) / (B)] is 0.2 or more and 20 or less. In the following description, this water-based composition for the body will also be appropriately referred to as "the water-based composition of the second invention".

[0157] The components (A), (B), water, and preferred methods of the aqueous composition of the second invention are the same as those described above.

[0158] From the viewpoints of film formation and improving water vapor barrier properties in low-humidity environments, 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. Furthermore, from the viewpoints of improving environmental responsiveness and improving the dispersibility of component (B), it is 10% by mass or less, preferably 8.0% by mass or less, more preferably 5.0% by mass or less, even more preferably 3.0% by mass or less, and even more preferably 2.0% by mass or less. Moreover, 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.

[0159] From the viewpoints of film formation and improved environmental responsiveness, 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, further preferably 0.8 or more, even more preferably 1.0 or more, and even more preferably 1.5 or more. Furthermore, from the viewpoint of improving water vapor barrier properties 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 even more preferably 10 or less. Moreover, 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, even more preferably 1.0 or more and 15 or less, and even more preferably 1.5 or more and 10 or less.

[0160] <Component (C): Cationic polymer>

[0161] From the viewpoint of improving the water resistance of the formed film, the aqueous composition of the second invention may further contain (C) a cationic polymer. The type, content, and preferred manner of the cationic polymer are the same as described above.

[0162] <Component (E): Nonionic polymer>

[0163] From the perspectives of improving water vapor barrier properties in low-humidity environments, improving environmental responsiveness, and ensuring stability when preparing cosmetic compositions by combining surfactants or oily components with the aqueous composition of the second invention, the aqueous composition of the second invention may further contain a nonionic polymer as a component (E). The types, amounts, and preferred methods of the nonionic polymers are the same as described above.

[0164] [Method for manufacturing the composition]

[0165] The method for manufacturing the compositions of the present invention (including the aqueous compositions of the second invention, hereinafter the same) is not particularly limited, and can be manufactured by mixing the components using known methods. It should be noted that, in the case where the composition contains a cationic polymer (C), from the viewpoints of improving coordination stability and manufacturing efficiency, the method for manufacturing the compositions of the present invention preferably includes the following step: mixing an aqueous dispersion containing components (A) and (B) with component (C). More specifically, it is more preferable to include the following step: pre-preparing an aqueous dispersion containing components (A) and (B), and then mixing the aqueous dispersion with component (C) or a solution thereof.

[0166] Similarly, when the composition contains a nonionic polymer (E), from the viewpoints of improving formulation stability and manufacturing efficiency, the method for manufacturing the composition of the present invention preferably includes the step of mixing an aqueous dispersion containing components (A) and (B) with component (E). More specifically, it is more preferable to include the step of pre-preparing an aqueous dispersion containing components (A) and (B), and then mixing the aqueous dispersion with component (E) or a solution thereof.

[0167] It should be noted that when the composition contains (C) a cationic polymer and (E) a nonionic polymer, there are no particular restrictions on the mixing order of components (C) and (E).

[0168] There are no particular restrictions on the mixing conditions when mixing the components. Generally, it can be carried out at 5 to 60°C using a known stirring device for 0.1 to 12 hours.

[0169] [Chemical Cosmetic Composition]

[0170] The present invention also provides a cosmetic composition comprising the above-described aqueous composition. By applying the cosmetic composition of the present invention to a treated object, a film can be formed that exhibits water vapor barrier properties in low humidity environments and water vapor release properties in high humidity environments.

[0171] The above-described cosmetic composition can be obtained by mixing the above-described aqueous composition with other ingredients without impairing the effects of the present invention. Examples of such other ingredients include: surfactants, pH adjusters, oils, feel enhancers, colorants, antioxidants, anti-dandruff agents, vitamins, bactericides, anti-inflammatory agents, preservatives, chelating agents, moisturizers, pearlescent agents, ceramides, plant extracts, and ultraviolet absorbers.

[0172] The content of the above-mentioned 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, even more preferably 90% by mass or more, and even more preferably 100% by mass or less. The above-mentioned aqueous composition can be used directly as a cosmetic composition.

[0173] <Form of Cosmetic Compositions>

[0174] The cosmetic composition of the present invention can be in the form of an aqueous cosmetic composition or an emulsified cosmetic composition. The emulsified cosmetic composition can be either an oil-in-water cosmetic composition or an oil-in-water cosmetic composition, but from the viewpoint of not impairing the effect of the aqueous composition and improving the user experience, an oil-in-water emulsified cosmetic composition is preferred.

[0175] Examples 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 present invention in forming a film, the cosmetic composition is preferably a leave-in cosmetic composition that can be used without rinsing after application to the object being treated.

[0176] Examples of cosmetic compositions that can be categorized as skin cosmetic compositions include: color cosmetics, sunscreens, base makeup, lotions, serums, creams, etc. Examples of hair cosmetic compositions that can be categorized as: shampoos, conditioners, hair conditioners, hair treatments (including leave-in types), hair styling agents, hair dyes, perming styling agents, etc. From the viewpoint of the effectiveness of the present invention in achieving film-forming properties, hair conditioners, hair treatments, or hair styling agents are preferred as hair cosmetic compositions.

[0177] [How to use]

[0178] The present invention further provides a method of using the composition, which includes the following steps: applying the above-mentioned water-based body composition or the above-mentioned cosmetic composition to keratin substances to form a film.

[0179] As a keratin substance, skin or hair is preferred from the viewpoint of the effectiveness of the present invention, and skin is more preferred.

[0180] In the method of using the composition of the present invention, firstly, the above-mentioned water-based body composition or the above-mentioned cosmetic composition is applied to a keratin substance. Examples of methods for applying the composition include coating, casting, or spraying the composition onto the keratin substance, with coating being preferred.

[0181] In the case of skin composed of keratin, from the viewpoint of forming a film that exhibits water vapor barrier properties in low humidity environments and water vapor release properties in high humidity environments, the application amount of the skin composition is per 1 cm of skin. 2 The amount is preferably 0.01 mg or more and 50 mg or less, more preferably 0.1 mg or more and 30 mg or less.

[0182] When the keratin material is hair, from the viewpoint of forming a film that exhibits water vapor barrier properties in low humidity environments and water vapor release properties in high humidity environments, the amount of hair composition applied is preferably 0.005 or more, more preferably 0.01 or more, further preferably 0.05 or more, and preferably 20 or less, more preferably 15 or less, and further preferably 12 or less, based on the bath ratio (mass of composition / dry mass of hair applied) relative to the mass of hair applied.

[0183] The hair to which the composition is applied may be all or part of the hair.

[0184] While rinsing the composition after applying it to keratinous materials is permissible, from the viewpoint of maximizing the effectiveness of the film-forming effect of the present invention, it is preferable to perform a drying process without rinsing the composition, thereby forming a film on the surface of the keratinous material. When the keratinous material is skin, natural drying is sufficient. When the keratinous material is hair, in addition to natural drying, it can also be dried by towel drying, hair dryer, or similar methods.

[0185] The present invention also discloses the following aspects in relation to the above embodiments.

[0186] <1>

[0187] A water-based composition for the body, comprising: (A) an anionic polymer having a viscosity of 5,000 mPa·s or more at 25°C and having sulfonic acid or sulfuric acid groups in a 2% by mass aqueous solution; (B) one or more selected from water-swellable clay minerals and water-swellable mica with an aspect ratio of 150 or more; and water.

[0188] The storage modulus of the above composition, as determined by dynamic viscoelasticity testing at a temperature of 25°C, a frequency of 2Hz, and a strain of 0.01%, is 60 Pa or more and 5,000 Pa or less.

[0189] <2>

[0190] In the water-based composition for the body, as described in <1>, the viscosity of a 2% by mass aqueous solution of the above-mentioned component (A) at 25°C is preferably 5,000 mPa·s or more and 200,000 mPa·s or less, more preferably 5,500 mPa·s or more and 150,000 mPa·s or less, even more preferably 6,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 10,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 30,000 mPa·s or more and 100,000 mPa·s or less, even more preferably 50,000 mPa·s or more and 100,000 mPa·s or less, and even more preferably 70,000 mPa·s or more and 100,000 mPa·s or less.

[0191] <3>

[0192] A water-based body composition such as <1> or <2>, wherein the above-mentioned component (A) comprises: one or more selected from (A1) anionic polysaccharides having sulfonic acid groups or sulfate groups, and (A2) anionic polymers having structural units represented by the following general formula (1).

[0193] [Chemical Formula 4]

[0194]

[0195] In equation (1), R 1 M is a hydrogen atom or a methyl group, and M is a hydrogen atom, an alkali metal, or ammonium.

[0196] <4>

[0197] For example, in the water-based body composition of <3>, R in the above general formula (1) 1 Hydrogen atoms are preferred, and M is preferably an alkali metal or ammonium, more preferably sodium or ammonium.

[0198] <5>

[0199] In the water-based composition for the body, such as <5>, the above-mentioned component (A1) is preferably a semi-synthetic polysaccharide, more preferably a cellulose derivative having a sulfonic acid group or a sulfate group, further preferably a cellulose derivative having a sulfonic acid group and a hydrophobic group having 8 or more carbon atoms and 24 or fewer carbon atoms, even more preferably a cellulose derivative having a sulfonic acid group and a hydrophobic group having 8 or more carbon atoms and 24 or fewer carbon atoms, even more preferably one or more selected from stearoxy PG hydroxyethyl cellulose sulfonic acid or its salts, and even more preferably sodium stearoxy PG hydroxyethyl cellulose sulfonate.

[0200] <6>

[0201] Such as <5>, in the body water-based composition, wherein the above-mentioned semi-synthetic polysaccharide is a cellulose derivative or starch derivative having sulfonic acid group or sulfate group.

[0202] <7>

[0203] The water-based body composition of any one of <3> to <6>, wherein the above-mentioned component (A2) is selected from one or more of sodium polyacrylamide dimethyl taurate, ammonium polyacrylamide dimethyl taurate, (sodium acrylate / sodium acrylamide dimethyl taurate) copolymer, (hydroxyethyl acrylate / sodium acrylamide dimethyl taurate) copolymer, (ammonium acrylamide dimethyl taurate / VP) copolymer, polyacrylate crosspolymer-6 (ammonium acrylamide dimethyl taurate, dimethacrylamide, lauryl methacrylate and lauryl alcohol polyether-4 methacrylate), and (ammonium acrylamide dimethyl taurate / behenol polyether-25 methacrylate) crosspolymer, preferably selected from one or more of (sodium acrylate / sodium acrylamide dimethyl taurate) copolymer, (hydroxyethyl acrylate / sodium acrylamide dimethyl taurate) copolymer, (ammonium acrylamide dimethyl taurate / VP) copolymer, and polyacrylate crosspolymer-6.

[0204] <8>

[0205] The water-based body composition of any one of <1> to <7>, wherein the above-mentioned component (A) is preferably selected from one or more of sodium polyacrylamide dimethyl taurate, sodium stearoxy PG hydroxyethyl cellulose sulfonate, (sodium acrylate / sodium acrylamide dimethyl taurate) copolymer, (hydroxyethyl acrylate / sodium acrylamide dimethyl taurate) copolymer, (ammonium acrylamide dimethyl taurate / VP) copolymer, and polyacrylate crosspolymer-6.

[0206] <9>

[0207] A water-based composition for the body, such as any one of <1> to <8>, wherein the water swelling degree of the above component (B) determined by the following test method is 40 mL / 2 g or more.

[0208] (Experimental Methods)

[0209] Add 100 mL of ion-exchanged water to a 100 mL graduated cylinder. Add 2 g of component (B) gradually in several small amounts, ensuring it doesn't adhere to the cylinder walls. After all component (B) has settled naturally to the bottom of the cylinder, read the volume (mL) of component (B) after 24 hours from the scale. Take the average of the three tests as the water swelling degree of component (B) (mL / 2g).

[0210] <10>

[0211] The water-based composition for the body, as described in any one of <1> to <9>, wherein the water swelling degree of the above-mentioned 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, further 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.

[0212] <11>

[0213] The water-based body composition of any one of <1> to <10>, wherein the aspect ratio of the above-mentioned component (B) is 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.

[0214] <12>

[0215] The water-based composition for the body, as described in any one of <1> to <11>, wherein the average particle size of the above-mentioned 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.

[0216] <13>

[0217] The water-based composition for the body as described in any one of <1> to <12>, wherein the above-mentioned component (B) is preferably selected from one or more of water-swellable bentonite, water-swellable montmorillonite, and water-swellable mica, and more preferably selected from one or more of water-swellable bentonite, water-swellable montmorillonite, and sodium tetrasilica.

[0218] <14>

[0219] The water-based body composition according to any one of <1> to <13>, wherein the content of component (A) in the water-based body 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, even more preferably 0.5% by mass or more and 8.0% by mass or less, even more preferably 1.0% by mass or more and 5.0% by mass or less, even more preferably 1.2% by mass or more and 3.0% by mass or less.

[0220] <15>

[0221] The water-based body composition according to any one of <1> to <14>, wherein the content of component (B) in the water-based body 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, 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.

[0222] <16>

[0223] The water-based body composition according to any one of <1> to <15>, wherein the mass ratio of component (A) to component (B) in the water-based body 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, even more preferably 0.8 or more and 18 or less, even more preferably 1.0 or more and 15 or less, and even more preferably 1.5 or more and 10 or less.

[0224] <17>

[0225] The water-based body composition of any one of <1> to <16>, wherein the total content of component (A) and component (B) in the water-based body 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, further preferably 1.0% by mass or more and 10% by mass or less, even more preferably 1.5% by mass or more and 5.0% by mass or less, and even more preferably 2.0% by mass or more and 4.0% by mass or less.

[0226] <18>

[0227] The water-based composition for the body, as described in any one of <1> to <17>, wherein the water content in the water-based composition for the body 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.

[0228] <19>

[0229] The water-based body composition of any one of <1> to <18> further contains (C) a cationic polymer.

[0230] <20>

[0231] The water-based composition for the body, such as <19>, wherein the above-mentioned component (C) preferably (C1) comprises a cationic polymer of a structural unit represented by the following general formula (2), and (C2) is a cationic polymer selected from cationic polysaccharides.

[0232] [Chemical Formula 5]

[0233]

[0234] In equation (2), R 11 R is a hydrogen atom or a methyl group. 12 ~R 14 Each is an alkyl group having 1 or more but less than 4 carbon atoms. X is -O- or -NH-, and m is 1 or more but less than 4 carbon atoms.

[0235] <21>

[0236] The water-based composition for the body, such as <20>, wherein the above-mentioned component (C1) is selected from one or more of the following: methyl methacryloyl ethyl trimethylammonium chloride polymer (polyquaternium salt-37), methyl methacryloyl ethyl dimethyl betaine-methyl methacryloyl ethyl trimethylammonium chloride-methoxy polyethylene glycol ester copolymer (polyquaternium salt-49), methyl methacryloyl ethyl dimethyl betaine-methyl methacryloyl ethyl trimethylammonium chloride-2-hydroxyethyl methacrylate copolymer (polyquaternium salt-48), and N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-dimethyl methacrylate polyethylene glycol ester copolymer (polyquaternium salt-52), preferably selected from one or more of the following: methyl methacryloyl ethyl trimethylammonium chloride polymer (polyquaternium salt-37) and N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-dimethyl methacrylate polyethylene glycol ester copolymer (polyquaternium salt-52).

[0237] <22>

[0238] In the water-based body composition such as <20> or <21>, the above-mentioned component (C2) is preferably selected from one or more of cationic galactomannan and cationic polymers having a cellulose backbone, more preferably cationic polymers having a cellulose backbone, further preferably cationic hydroxyethyl cellulose, and even more preferably hydroxyethyl cellulose hydroxypropyltrimethylammonium chloride ether (polyquaternium-10).

[0239] <23>

[0240] The water-based body composition of any one of <19> to <22>, wherein the above-mentioned component (C) is preferably selected from one or more of the following: methyl methacryloyl ethyl trimethylammonium chloride polymer (polyquaternium salt-37), N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-dimethacrylate polyethylene glycol copolymer (polyquaternium salt-52), and hydroxyethyl cellulose hydroxypropyl trimethylammonium chloride ether (polyquaternium salt-10).

[0241] <24>

[0242] The water-based body composition of any one of <19> to <23>, wherein the content of component (C) in the water-based body 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.

[0243] <25>

[0244] The water-based body composition of any one of <19> to <24>, wherein the total content of component (A) and component (C) in the water-based body composition is preferably 0.1% by mass or more and 15% by mass or less, more preferably 0.2% by mass or more and 10% by mass or less, further preferably 0.3% by mass or more and 5.0% by mass or less, even more preferably 0.5% by mass or more and 5.0% by mass or less, even more preferably 1.0% by mass or more and 5.0% by mass or less, even more preferably 1.2% by mass or more and 3.5% by mass or less, and even more preferably 1.5% by mass or more and 3.5% by mass or less.

[0245] <26>

[0246] The water-based body composition of any one of <19> to <25>, wherein the mass ratio of the total amount of component (A) and component (C) in the water-based body composition to component (B) [{(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.

[0247] <27>

[0248] A water-based body composition such as any one of <1> to <26>, further comprising glycerin or its condensate as ingredient (D).

[0249] <28>

[0250] The water-based body composition of <27>, wherein the above-mentioned component (D) is preferably selected from one or more of glycerol and diglycerol, more preferably glycerol.

[0251] <29>

[0252] The water-based body composition, such as <27> or <28>, wherein the content of component (D) in the water-based body 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, further preferably 0.5% by mass or more and 10% by mass or less, and even more preferably 1.0% by mass or more and 5.0% by mass or less.

[0253] <30>

[0254] The water-based body composition of any one of <1> to <29> further contains (E) a nonionic polymer.

[0255] <31>

[0256] In the water-based composition for the body, such as <30>, the viscosity of a 2% by mass aqueous solution of the above-mentioned 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, even more preferably 10,000 mPa·s or more and 600,000 mPa·s or less, even more preferably 15,000 mPa·s or more and 500,000 mPa·s or less, even more preferably 15,000 mPa·s or more and 300,000 mPa·s or less, even more preferably 20,000 mPa·s or more and 200,000 mPa·s or less, even more preferably 20,000 mPa·s or more and 150,000 mPa·s or less.

[0257] <32>

[0258] The water-based body composition such as <30> or <31>, wherein the aforementioned component (E) comprises one or more polymers selected from those containing structural units derived from N-substituted or unsubstituted (meth)acrylamide, polymers containing structural units derived from (meth)acrylates, and nonionic polysaccharides, preferably one or more selected from polyacrylamide, polymethacrylamide, polydimethacrylamide, polydiethylacrylamide, ((meth)acrylamide / dimethyl(meth)acrylamide) copolymer, and cellulose derivatives having substituents containing alkyl groups having eight or more carbon atoms. More preferably, it includes one or more compounds selected from polyacrylamide, compounds in which a substituent comprising an alkyl group having 8 or more carbon atoms is introduced into hydroxyalkyl cellulose having a hydroxyalkyl or dihydroxyalkyl group, and compounds in which a substituent comprising an alkyl group having 8 or more carbon atoms is introduced into hydroxyalkyl-alkyl cellulose having a hydroxyalkyl or dihydroxyalkyl group and an alkyl group having 3 or fewer carbon atoms. More preferably, it includes one or more compounds selected from polyacrylamide, cetyl hydroxyethyl cellulose, and stearoxy PG hydroxyethyl cellulose. Even more preferably, it includes one or more compounds selected from polyacrylamide and stearoxy PG hydroxyethyl cellulose.

[0259] <33>

[0260] The water-based body composition of any one of <30> to <32>, wherein the content of component (E) in the water-based body 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, further preferably 0.3% by mass or more and 8.0% by mass or less, even more preferably 0.5% by mass or more and 8.0% by mass or less, even more preferably 0.7% by mass or more and 5.0% by mass or less, even more preferably 1.0% by mass or more and 5.0% by mass or less, and even more preferably 1.2% by mass or more and 3.0% by mass or less.

[0261] <34>

[0262] The water-based body composition of any one of <30> to <33>, wherein the mass ratio of component (E) to component (A) in the water-based body composition [(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, even more preferably 0.5 or more and 2.0 or less, and even more preferably 1.0 or more and 1.5 or less.

[0263] <35>

[0264] The water-based body composition of any one of <30> to <34>, wherein the mass ratio of the total amount of components (A), (C) and (E) in the water-based body composition relative to component (B) [{(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.

[0265] <36>

[0266] The water-based composition for the body, as described in any one of <1> to <35>, wherein the storage modulus of the water-based composition for the body, as measured by dynamic viscoelasticity determination at a temperature of 25°C, a frequency of 2Hz, 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.

[0267] <37>

[0268] A water-based composition for the body, comprising: (A) an anionic polymer having a viscosity of 5,000 mPa·s or more at 25°C and having sulfonic acid or sulfuric acid groups in a 2% by mass aqueous solution; (B) one or more selected from water-swellable clay minerals and water-swellable mica with an aspect ratio of 150 or more; and water.

[0269] The content of the above-mentioned component (B) is 0.01% by mass or more and 10% by mass or less.

[0270] The mass ratio of the above-mentioned component (A) to the above-mentioned component (B) [(A) / (B)] is 0.2 or more and 20 or less.

[0271] <38>

[0272] In the water-based body composition of <37>, the content of component (B) in the water-based body composition is 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.

[0273] <39>

[0274] In the water-based body composition such as <37> or <38>, the mass ratio of component (A) to component (B) in the above-mentioned water-based body 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, even more preferably 1.0 or more and 15 or less, and even more preferably 1.5 or more and 10 or less.

[0275] <40>

[0276] A cosmetic composition comprising a water-based body composition as described in any one of <1> to <39>.

[0277] <41>

[0278] In the cosmetic composition of <40>, the content of the above-mentioned water-based body 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, even more preferably 90% by mass or more, and even more preferably 100% by mass or less.

[0279] <42>

[0280] Cosmetic compositions such as <40> or <41>, wherein the cosmetic composition is a skin cosmetic composition or a hair cosmetic composition, preferably a skin cosmetic composition.

[0281] <43>

[0282] The cosmetic composition of any one of <40> to <42>, wherein the cosmetic composition is preferably a no-rinse cosmetic composition used without rinsing after application to an object being treated.

[0283] <44>

[0284] A method of using a composition, comprising the steps of applying a water-based body composition of any one of <1> to <39>, or a cosmetic composition of any one of <40> to <43>, to a keratin substance to form a film.

[0285] <45>

[0286] In the method of use of <44>, the keratin substance is preferably skin or hair, and more preferably skin.

[0287] Example

[0288] The present invention will now be described through embodiments, but the invention is not limited to the scope of these embodiments. It should be noted that the measurements and evaluations in the embodiments were performed using the following methods.

[0289] (Determination of viscosity of 2% by mass aqueous solutions of anionic and nonionic polymers)

[0290] A 2% by mass aqueous solution of the anionic polymer (component (A) or component (A')) and the nonionic polymer (component (E)) used in each example was prepared, and the viscosity of the aqueous solution at 25°C was determined by the following method. In this example, the anionic polymer other than component (A) is referred to as "component (A')".

[0291] • Less than 500 mPa·s: The measurement was performed at 10 rpm using a Bourdon viscometer “DV2T” manufactured by Eiko Seiki Co., Ltd. with a CPA-41Z shaft (angle 3deg, radius 24mm).

[0292] • 500 mPa·s or more but less than 3,000 mPa·s: The measurement was performed using a Type B viscometer "TVB-10" manufactured by Toki Sangyo Co., Ltd., with an M3 shaft, at 30 rpm.

[0293] • 3,000 mPa·s or more but less than 20,000 mPa·s: The measurement was performed using a Type B viscometer "TVB-10" manufactured by Toki Sangyo Co., Ltd., with an M4 shaft, at 30 rpm.

[0294] • 20,000 mPa·s or higher but less than 30,000 mPa·s: The viscometer was measured at 10 rpm using a Type B viscometer “TVB-10” and “T-bar stage” TC manufactured by Toki Sangyo Co., Ltd.

[0295] • Above 30,000 mPa·s: Measurements were taken at 10 rpm using a Type B viscometer “TVB-10”, “T-bar stage”, and TD manufactured by Toki Sangyo Co., Ltd.

[0296] (Determination of the aspect ratio of component (B) or component (B'))

[0297] The aspect ratios of components (B) or (B') listed in the table are determined according to the method described in Clay Science, Vol. 50, No. 3, pp. 162-174 (2012). It should be noted that in this embodiment, minerals other than component (B) are referred to as "component (B')".

[0298] For ion-exchanged water and aqueous dispersions of component (B) or component (B') at concentrations of 0.5%, 0.25%, and 0.1% by mass, a rheometer (MCR502, manufactured by Anton Paar) was used to measure the temperature at 25°C and a shear rate of 100 s⁻¹. -1The viscosity at each concentration is determined by using the viscosity of the obtained aqueous dispersion, the viscosity of water, and the volume ratio of component (B) or component (B').

[0299] Plot a regression line with the specific viscosity value as the vertical axis and the volume ratio of component (B) or component (B') as the horizontal axis, and determine the intrinsic viscosity of component (B) or component (B') based on its intercept. Substitute the obtained intrinsic viscosity into the Simha formula described in the Journal of Physical Chemistry, 44, 25-34 (1940) to calculate the aspect ratio of component (B) or component (B').

[0300] [Mathematical Expression 1]

[0301]

[0302] [η]: Intrinsic viscosity, f: Aspect ratio

[0303] It should be noted that the clay minerals (Kunipia G4, Kunipia F, Bengel HV, Bengel NextNC, kaolin) listed in the table are subjected to the following cleaning operations before the aspect ratio is determined.

[0304] The clay minerals were washed twice with a 1M sodium acetate aqueous solution (pH 5.0) to dissolve and remove the carbonates, followed by centrifugation to remove the supernatant. Then, the clay minerals were washed three times with a 2N-NaCl aqueous solution to completely replace the interlayer cations with Na+. + The supernatant was removed by centrifugation again, and the sample was washed three times with 70% isopropanol aqueous solution. After filtration using an Omnipore Membrane Filters 1.0μm JA membrane filter, the clay mineral filter cake was naturally dried, crushed using a mortar and pestle, and then used for analysis.

[0305] Furthermore, for clay minerals (synthetic lithium saponite XLS, kaolin, PDM-40L) whose viscosity in aqueous dispersions is almost indistinguishable from that of water, regression lines cannot be generated using the above method. This implies an infinitesimally small aspect ratio, indicating an aspect ratio below 10. It should be noted that substances that do not mix with water, such as organically modified clays (MOISTNITE WO, Sumecton SAN-P), also cannot have their aspect ratio determined using the above method.

[0306] (Determination of the water swelling degree of component (B) or component (B'))

[0307] Add 100 mL of ion-exchanged water to a 100 mL graduated cylinder. Add 2 g of component (B) or component (B') gradually in small amounts, ensuring it does not adhere to the cylinder walls. After all component (B) or component (B') has naturally settled to the bottom of the cylinder, read the volume X (mL / 2g) of component (B) or component (B') after 24 hours from the scale. Perform three experiments and record the average value as "water swelling (mL / 2g)" in the table.

[0308] It should be noted that for substances that do not mix with water, such as organically modified clay (MOISTNITE WO, Sumecton SAN-P), the degree of water swelling cannot be measured.

[0309] (Determination of the storage modulus G' of the composition)

[0310] Dynamic viscoelasticity was measured for each example of the water-based composition used in the body. The storage modulus G' at strains of 0.001% to 100% was measured using a rheometer (MCR502, Anton Paar) at a temperature of 25°C and a measurement frequency of 2 Hz. G' at strain of 0.01% in the flat region shown in the measurement graph is presented in the table.

[0311] (Determination of water vapor barrier properties (humidity 40%))

[0312] 1g of each sample of the aqueous composition was applied to filter paper (ADVANTEC, No. 1, ϕ70mm) and allowed to dry overnight. 20g of silica, acting as a desiccant, was added to a permeability test cup (ϕ60mm, 40mL capacity) and covered with the same filter paper. After measuring the initial weight of the filter paper and cup, the cup was placed in a constant temperature and humidity bath (ESPEC "SH-262") set at 35°C and 40% humidity. The weight of the filter paper and cup was measured after 1 hour, 2 hours, and 3 hours. The moisture absorption (g) at each time point was calculated by subtracting the initial weight of the filter paper and cup from the weight at each time point.

[0313] The slope of an approximate straight line plotted with moisture absorption on the vertical axis and time on the horizontal axis is defined as the water vapor transmission rate W1 (g / hr) per unit time. Similarly, using filter paper uncoated with the water-based composition, the water vapor transmission rate W0 (g / hr) was measured, and the reduction rate (%) of water vapor transmission rate was calculated according to the following formula (1). The average value for N=2 is shown in the table. A higher value for the reduction rate (%) of water vapor transmission rate indicates a higher water vapor barrier performance in low humidity environments.

[0314] The reduction rate of water vapor transmission (%) = {1 - (W1 / W0)} × 100 (1)

[0315] (Environmental responsiveness)

[0316] The reduction rate of water vapor transmission was similarly measured under the conditions of 35°C and 80% humidity, and the value calculated according to the following formula (2) was set as the environmental responsiveness. The larger the value, the higher the humidity responsiveness and the better the result. In this embodiment, it is preferably 40% or more.

[0317] Environmental responsiveness (%) = (reduction rate of water vapor transmission at 40% humidity) - (reduction rate of water vapor transmission at 80% humidity) (2)

[0318] (Evaluation of the water resistance of the membrane)

[0319] Each example of the aqueous composition was coated onto a Teflon (registered trademark) sheet and dried overnight to obtain a dried film. The obtained dried film was then floated in a petri dish containing ion-exchanged water and allowed to stand for 12 hours. Films that did not dissolve and maintained their shape after standing were rated A, and films that dissolved at least partially were rated B, as shown in the table.

[0320] Table 1 shows the water swelling degree and aspect ratio of component (B) and component (B') used in this embodiment and comparative example.

[0321] [Table 1]

[0322]

[0323] Examples 1-36 and Comparative Examples 1-17 (Preparation and Evaluation of Aqueous Compositions)

[0324] Prepare 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) in advance, and mix the components listed in the table in the following order. Use a disperser as the mixing device.

[0325] First, the balance of water (chloroform in Comparative Examples 16-17) was added to a 3% by mass aqueous solution of component (A) or component (A') and stirred. Then, a 3.5% by mass aqueous dispersion of component (B) or component (B') was added and stirred. In Examples 17-18, 20-21, and 24-25, glycerol was added. Then, in Examples 18-25, an aqueous solution of component (C) was added and stirred. In Examples 26-36, an aqueous solution of component (E) was added and stirred to obtain the aqueous body composition for each example. The obtained compositions were evaluated using the methods described above. The results are shown in Table 2.

[0326] [Table 2]

[0327]

[0328] [Table 3]

[0329]

[0330] [Table 4]

[0331]

[0332] [Table 5]

[0333]

[0334] [Table 6]

[0335]

[0336] [Table 7]

[0337]

[0338] The components listed in the table are as follows. Additionally, the amounts (mass %) listed in the table represent the effective amount of each component.

[0339] <Ingredient (A): Anionic polymer>

[0340] *1: SPS-S-SA: Manufactured by Kao Corporation, 100% active ingredient.

[0341] *2: Simulgel EG QD: Manufactured by SEPIC, active ingredient 37.5%

[0342] *3: SEPINOV EMT10: Manufactured by SEPIC, with 89.3% active ingredient.

[0343] *4: Sepiplus S: Manufactured by SEPIC, 61% active ingredient.

[0344] *5: Simulgel FL: Manufactured by SEPIC, 38% active ingredient.

[0345] *6: Simulgel NS: Manufactured by SEPIC, 37% active ingredient.

[0346] *7: Sepimax Zen: Manufactured by SEPIC, 95% active ingredient.

[0347] *8: Aristoflex AVC: Manufactured by Clariant Japan Co., Ltd.

[0348] <Component (A'): Anionic polymers other than component (A)>

[0349] *9: Carrageenan SC-67(N): Manufactured by San-eigen FFI Co., Ltd.

[0350] *10: Polyvinyl sulfonic acid: Manufactured by Polysciences, Inc., 25% active ingredient.

[0351] *11: JURYMER AC-10SH: Manufactured by Toa Synthetic Co., Ltd., active ingredient 40%.

[0352] *12: Kimica Argin I-3: Manufactured by Kimica Corporation

[0353] *13: Echo Gum: Manufactured by SUMITOMO PHARMA FOOD & CHEMICAL Co., Ltd.

[0354] *14: Ingeo 3001D: Manufactured by Nature Works

[0355] <Ingredient (B)>

[0356] *15: Kunipia G4: Manufactured by Kunimine Industries Co., Ltd., average particle size 385nm

[0357] *16: Kunipia F: Manufactured by KUNIMINE INDUSTRIES Co., Ltd., average particle size 338nm

[0358] *17: Bengel HV: Manufactured by Ho Jun Corporation, average particle size 464nm

[0359] *18: Bengel Next Nc: Manufactured by Ho Jun Co., Ltd., average particle size 759nm

[0360] *19: NTS-5: Manufactured by TOPY INDUSTRIES Co., Ltd., average particle size 580nm

[0361] <Component (B'): Minerals, etc., other than component (B)>

[0362] *20: Sumecton-SA: Manufactured by KUNIMINE INDUSTRIES Co., Ltd., average particle size 108nm

[0363] *21: Sumecton-ST: Manufactured by KUNIMINE INDUSTRIES Co., Ltd., average particle size 77nm

[0364] *22: Sumecton-SWN: Manufactured by KUNIMINE INDUSTRIES Co., Ltd., average particle size 127nm

[0365] *23: Synthetic lithium saponite XLS: Manufactured by Rockwood Additives Limited, average particle size 79nm

[0366] *24: Kaolin: Manufactured by Brenntag Specialties, Inc., average particle size 309 nm

[0367] *25: MOISTNITE WO: Made by KUNIMINE INDUSTRIES Co., Ltd.

[0368] *26: Sumecton-SAN-P: Manufactured by KUNIMINE INDUSTRIES Co., Ltd.

[0369] *27: PDM-40L: Manufactured by TOPY INDUSTRIES Co., Ltd., average particle size 1023nm

[0370] <Component (C): Cationic polymer>

[0371] *28: Polymer KG30: Manufactured by Kao Corporation, 30% active ingredient.

[0372] *29: KP Polymer E: Manufactured by Kao Corporation, 35% active ingredient.

[0373] *30: Poiz C-60H: Manufactured by Kao Corporation

[0374] <Component (E): Nonionic polymer>

[0375] *31: SEPIGEL 305: Manufactured by SEPIC, 40% active ingredient.

[0376] *32: Metolose 60 SH-4000: Manufactured by Shin-Etsu Chemical Co., Ltd.

[0377] As can be seen from the table above, the film formed by the water-based composition of the present invention exhibits 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 water resistance of the film formed by the water-based composition containing component (C) is further improved.

[0378] The present invention also discloses the following formulation examples.

[0379] [Table 8]

[0380]

[0381] [Table 9]

[0382]

[0383] The components listed in Tables 8 and 9 are as follows. Furthermore, the amounts (mass %) listed in Tables 8 and 9 represent the effective amount of each component.

[0384] *3: SEPINOV EMT10: Manufactured by SEPIC, with 89.3% active ingredient.

[0385] *15: Kunipia G4: Manufactured by Kunimine Industries Co., Ltd., average particle size 385nm

[0386] *31: SEPIGEL 305: Manufactured by SEPIC, 40% active ingredient.

[0387] Industrial availability

[0388] According to the present invention, a water-based composition for the body can be provided, which can form a film exhibiting high water vapor barrier properties in low humidity environments and water vapor release properties in high humidity environments. This composition has film-forming properties and can be used as a variety of cosmetic compositions.

Claims

1. A water-based composition for the body, comprising the following ingredients: Component A: An anionic polymer with a viscosity of 5,000 mPa·s or higher at 25°C and containing sulfonic acid or sulfuric acid groups in a 2% (by mass) aqueous solution. Component B: Selected from one or more water-swellable clay minerals and water-swellable mica with an aspect ratio of 150 or higher. water, The storage modulus of the composition, as determined by dynamic viscoelasticity testing at a temperature of 25°C, a frequency of 2Hz, and a strain of 0.01%, is greater than 60 Pa and less than 5,000 Pa.

2. The water-based composition for the body according to claim 1, wherein, The content of component B in the composition is 0.01% by mass or more and 10% by mass or less.

3. The water-based composition for the body 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. The water-based composition for the body according to claim 1 or 2, wherein, The content of component A in the composition is 0.1% by mass or more and 10% by mass or less.

5. The water-based composition for the body according to claim 1 or 2, wherein, Component A comprises one or more selected from components A1 and A2, wherein component A1 is an anionic polysaccharide having sulfonic acid or sulfate groups, and component A2 is an anionic polymer having structural units represented by the following general formula (1). In equation (1), R 1 M is a hydrogen atom or a methyl group, and M is a hydrogen atom, an alkali metal, or ammonium.

6. The water-based composition for the body according to claim 1 or 2, further comprising component C, wherein component C is a cationic polymer.

7. The water-based composition for the body according to claim 1 or 2, further comprising component E, wherein component E is a nonionic polymer.

8. A water-based composition for the body, comprising: Component A: An anionic polymer with a viscosity of 5,000 mPa·s or higher at 25°C and containing sulfonic acid or sulfuric acid groups in a 2% (by mass) aqueous solution. Component B: Selected from one or more water-swellable clay minerals and water-swellable mica with an aspect ratio of 150 or higher. water, The content of component B is 0.01% by mass or more and 10% by mass or less. The mass ratio of component A to component B, A / B, is 0.2 or more and 20 or less.

9. The water-based composition for the body according to claim 8, further comprising component E, wherein component E is a nonionic polymer.

10. The water-based composition for the body according to claim 8 or 9, further comprising component C, wherein component C is a cationic polymer.

11. A cosmetic composition comprising the water-based body composition of claim 1 or 8.

12. A method of using a composition, comprising the following steps: The process of applying the water-based body composition of claim 1 or 8, or the cosmetic composition of claim 11, to a keratin substance to form a film.

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