Aqueous composition for body use

Abstract

To provide an aqueous composition for body use that can improve the texture of an object to be treated and the durability of the effect, and in particular, when used in hair treatment, can improve the effect of preventing hair tangles and the durability of the effect.SOLUTION: An aqueous composition for body use comprises: (A) a cationic polymer having a viscosity of 1,000 mPa s or more in a 1 mass% aqueous solution at 30°C; (B) an anionic polymer; (C) a nonionic polymer having a weight-average molecular weight of 5,000 or more and 1,500,000 or less; and water.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Aqueous compositions for treating keratinous materials containing a cationic polymer and an anionic polymer are known. For example, Patent Document 1 describes that by using a composition for treating keratinous materials characterized by containing at least one anionic polymer and at least one cationic polymer in a solvent medium, the anionic polymer can be fixed to keratinous materials, particularly hair, skin, or nails. It is hypothesized that the above effect is due to a complex formed by the interaction between the anionic polymer and the cationic polymer.

[0003] Regarding hair cosmetics containing cationic polymers and anionic polymers, Patent Document 2 describes that a semi-permanent hair dye composition containing one or more polymer compounds selected from the group consisting of aromatic alcohols, cationic compounds, and water-soluble anionic polymer compounds, a direct dye, and an acid, and having a pH and viscosity of at least a specified value, has sufficient dyeability and a high conditioning effect, and also has a stable viscosity even at high temperatures and over a long period of time. Patent Document 3 discloses a composition comprising, in a physiologically acceptable medium containing a fatty phase, (i) a first polymer having a weight-average molecular mass of less than 100,000, wherein the first polymer comprises a) a polymer backbone having hydrocarbon-based repeating units containing at least one heteroatom, and optionally b) pendant and / or terminal fatty chains containing 6 to 120 carbon atoms and which may be optionally functionalized, and which is bonded to the hydrocarbon-based units, (ii) an anionic film-forming polymer, and (iii) a cationic film-forming polymer. The composition is described as providing a rapid makeup effect to keratinous materials and being applicable to makeup and care methods for keratinous materials, particularly as a mascara. Patent Document 4 describes that a hair styling gel containing a combination of a first polymer consisting of a hydrocolloid based on a nonionic or anionic polysaccharide, a second polymer consisting of an acrylic or methacrylamidoalkylsulfonic acid or a salt thereof, and a third polymer which is an amphiphilic polymer, exhibits a volume-imparting effect on wet hair and has an effect of structuring a hairstyle on dry hair. Furthermore, Patent Document 5 describes that a hair cosmetic containing a cationic polymer having a charge density within a specified range and an anionic polymer containing 80% by mass or more and 100% by mass or less of specified anionic constituent units and having a weight-average molecular weight of 4,000 or more and 80,000 or less can improve the feel and appearance of damaged hair, and can maintain these effects even after repeated hair washing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 53-139734 [Patent Document 2] Japanese Patent Application Publication No. 10-287535 [Patent Document 3] Special Publication No. 2004-525101 [Patent Document 4] Japanese Patent Application Laid-Open No. 2006-70030 [Patent Document 5] Japanese Patent Application Laid-Open No. 2015-166333 Summary of the Invention [Problem to be solved by the invention]

[0005] As described in Patent Document 1 and the like, it is known that an aqueous composition containing a complex formed from a cationic polymer and an anionic polymer (hereinafter also referred to as a "polyion complex") is used as a composition for treating keratinous materials such as hair. A polyion complex is an aggregate formed by the ionic interaction between a cationic polymer and an anionic polymer. When a treatment composition containing the polyion complex is applied to an object to be treated, a cuticle-like, highly elastic film can be formed. This improves the texture of the object to be treated. For example, when the composition is used as a hair cosmetic composition such as a hair conditioner, it is expected to exhibit hair care effects, such as improved hair tangle prevention. However, Patent Documents 1 to 5 do not specifically mention improving the hair tangle prevention effect. Furthermore, the hair treatment effect can be lost after one wash, so there is a need for an improvement in the durability of the treatment effect (washability).

[0006] The present invention relates to an aqueous composition for body use that can improve the texture improvement effect of an object to be treated and the durability of said effect, and in particular, when used in hair treatment, can improve the effect of inhibiting hair tangles and the durability of said effect. [Means for solving the problem]

[0007] The present inventors have found that the above-mentioned problems can be solved by an aqueous composition containing water and a cationic polymer, an anionic polymer, a nonionic polymer, and a 1% by mass aqueous solution having a viscosity of a predetermined value or more. That is, the present invention relates to the following. [1] An aqueous composition for personal use comprising: (A) a cationic polymer having a viscosity of 1,000 mPa·s or more in a 1% by mass aqueous solution at 30°C; (B) an anionic polymer; (C) a nonionic polymer; and water. [2] A cosmetic composition comprising the aqueous body composition described in [1] above. [3] A hair treatment method comprising the steps of applying the cosmetic composition described in [2] above to hair, and then heating the hair to a temperature of 80°C or higher. [Effects of the Invention]

[0008] According to the present invention, an aqueous composition for body use can be provided which can improve the texture improving effect of the object to be treated and the durability of said effect, and in particular, when used in hair treatment, can improve the effect of inhibiting hair tangles and the durability of said effect. The aqueous composition can be used as various cosmetic compositions such as skin cosmetic compositions and hair cosmetic compositions. The aqueous composition can also be used as a premix for various cosmetic compositions. For example, a skin cosmetic composition or a hair cosmetic composition can be prepared by blending additional components into the aqueous composition. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Definition] As used herein, the term "aqueous composition for the body" refers to an aqueous composition used to treat the surface of a body, such as the surface of keratinous materials such as skin, hair, eyelashes, eyebrows, nails, etc. The term "aqueous composition" refers to a composition containing water as the main component, and preferably refers to a composition containing 50% by mass or more of water. The aqueous body composition of the present invention is preferably an aqueous composition for treating keratinous substances, more preferably an aqueous composition for treating skin or hair. In this specification, the phrase "containing component X" also includes blending component X.

[0010] [Aqueous composition for body use] The aqueous composition for body use of the present invention (hereinafter also referred to simply as the "aqueous composition" or "composition of the present invention") contains (A) a cationic polymer having a viscosity of 1,000 mPa·s or more in a 1% by mass aqueous solution at 30°C, (B) an anionic polymer, (C) a nonionic polymer, and water. By having the above-described configuration, the composition of the present invention can improve the texture improving effect of the treated object and the durability of said effect, and in particular, when used in hair treatment, can improve the effect of inhibiting hair tangles and the durability of said effect.

[0011] The reason why the composition of the present invention exhibits the above-mentioned effects is not clear, but is thought to be as follows. The composition of the present invention contains a polyion complex formed by ionic interaction between component (A) and component (B). In the polyion complex, a crosslinked structure is formed between component (A) and component (B) due to the ionic interaction, which is thought to be the reason why films obtained using the composition of the present invention exhibit a high elastic modulus. Furthermore, the composition of the present invention contains a nonionic polymer as component (C). In the film obtained using the composition of the present invention, the rigid cross-linked structure of the polyion complex formed by components (A) and (B) is thought to be reinforced by the complexation with the long-chain, flexible, non-cross-linked structure of component (C). Furthermore, because hydrogen bonding is possible between components (B) and (C), component (C) is thought to be held within the cross-linked structure by component (B), forming a stronger network in the film. Therefore, when the composition of the present invention is used, the texture of the treated object can be improved even with a single treatment, and the treatment effect is not lost even after subsequent washing, resulting in a sustained effect. Furthermore, by ensuring that a 1% by mass aqueous solution of component (A) used in the present invention has a viscosity of 1,000 mPa·s or higher at 30°C, it is believed that the lubricity of the resulting film is improved, which in turn improves the texture of the treated object and, when the composition of the present invention is used for hair treatment, is believed to improve the effect of preventing hair tangles.

[0012] (Component (A): Cationic polymer) Component (A) is a cationic polymer having a viscosity of 1,000 mPa·s or more in a 1% by mass aqueous solution at 30°C, and is a polymer that can form a polyion complex through interaction with component (B). The cationic polymer of component (A) is preferably a polymer having cationic groups and a positive net charge. Component (A) may have anionic groups, nonionic groups, or amphoteric groups such as betaine groups in addition to the cationic groups, as long as the effects of the present invention are not impaired. In this specification, the cationic group refers to a cationic group or a group that can be ionized to become a cationic group, and specific examples thereof include a primary amino group, a secondary amino group, a tertiary amino group, and a quaternary ammonium group. The anionic group is an anionic group or a group that can be ionized to become an anionic group, and specifically includes at least one selected from the group consisting of acidic groups such as a carboxy group, a sulfonic acid group, and a phosphate group, preferably at least one selected from a carboxy group and a sulfonic acid group, more preferably a carboxy group. At least a portion of the anionic group may be neutralized and in the form of a salt.

[0013] The viscosity of a 1% by mass aqueous solution of component (A) at 30°C is 1,000 mPa·s or more, preferably 1,300 mPa·s or more, more preferably 1,500 mPa·s or more, even more preferably 1,700 mPa·s or more, and still more preferably 1,800 mPa·s or more, from the viewpoints of the texture-improving effect on the treated object and the durability of said effect, particularly the effect of inhibiting hair entanglement when used in hair treatment and the durability of said effect. There is no particular upper limit to the viscosity, but from the viewpoints of ease of polyion complex formation and handleability, it is preferably 100,000 mPa·s or less, more preferably 80,000 mPa·s or less, even more preferably 50,000 mPa·s or less, still more preferably 30,000 mPa·s or less, and still more preferably 25,000 mPa·s or less. The viscosity of a 1% by mass aqueous solution of component (A) at 30°C is 1,000 mPa·s or more, preferably 1,000 mPa·s or more and 100,000 mPa·s or less, more preferably 1,300 mPa·s or more and 80,000 mPa·s or less, even more preferably 1,500 mPa·s or more and 50,000 mPa·s or less, still more preferably 1,700 mPa·s or more and 30,000 mPa·s or less, and even more preferably 1,800 mPa·s or more and 25,000 mPa·s or less. The viscosity of a 1% by mass aqueous solution of component (A) at 30°C means the viscosity of an aqueous solution containing 1% by mass of the active ingredient of the cationic polymer at 30°C, and can be measured specifically by the method described in the examples.

[0014] The cationic charge density of component (A) is preferably 0.1 mmol / g or more, more preferably 0.2 mmol / g or more, even more preferably 0.3 mmol / g or more, and still more preferably 0.5 mmol / g or more, from the viewpoints of facilitating the formation of a polyion complex through interaction with component (B), improving the texture of the object to be treated and improving the durability of said effect, particularly improving the effect of preventing hair entanglement when used in hair treatment and improving the durability of said effect. Furthermore, from the viewpoints of improving the texture of the object to be treated and improving the durability of said effect, particularly improving the effect of preventing hair entanglement when used in hair treatment and improving the durability of said effect, the cationic charge density is preferably 20 mmol / g or less, more preferably 15 mmol / g or less, even more preferably 12 mmol / g or less, still more preferably 10 mmol / g or less, still more preferably 7.0 mmol / g or less, and still more preferably 5.0 mmol / g or less. The cationic charge density of component (A) is preferably 0.1 mmol / g or more and 20 mmol / g or less, more preferably 0.2 mmol / g or more and 15 mmol / g or less, 0.2 mmol / g or more and 12 mmol / g or less, even more preferably 0.3 mmol / g or more and 10 mmol / g or less, even more preferably 0.3 mmol / g or more and 7.0 mmol / g or less, and even more preferably 0.5 mmol / g or more and 5.0 mmol / g or less.

[0015] The cationic charge density of component (A) is the number of moles of cationic groups contained per gram of polymer. When at least a portion of the cationic groups of component (A) are in the form of neutralized salts, the number of moles of cationic groups mentioned above includes the number of moles of cationic groups in the form of salts. Two or more polymers may be used as component (A). In this case, the cationic charge density of component (A) is determined by calculating a weighted average from the cationic charge density and blending amount of each polymer.

[0016] As component (A), any of natural polymers such as cationized polysaccharides or cationized products thereof, and synthetic polymers can be used, but from the viewpoint of easy availability, synthetic polymers are preferred. Specific examples of polymers that can be used as component (A) include cationized polyvinyl alcohol, polyethyleneimine, methacryloylethyltrimethylammonium salt polymers, quaternized dialkylaminoalkyl (meth)acrylate polymers, diallyl quaternized ammonium salt polymers, methacrylamidepropyltrimethylammonium salt polymers, vinylimidazolium trichloride-vinylpyrrolidone copolymers (polyquaternium-16), vinylpyrrolidone-alkylamino(meth)acrylate copolymers, vinylpyrrolidone-alkylamino(meth)acrylate-vinylcaprolactam copolymers, alkylacrylamide-(meth)acrylate-alkylaminoalkylacrylamide-polyethylene glycol (meth)acrylate copolymers, and adipic acid-dimethylaminohydroxypropylethylenetriamine copolymers, all of which have a viscosity of 1,000 mPa·s or more in a 1% by mass aqueous solution at 30°C. One or more of these may be used. In this specification, "(meth)acrylic acid" means acrylic acid or methacrylic acid, and "(meth)acrylate" means acrylate or methacrylate.

[0017] Among the above, examples of methacryloylethyltrimethylammonium salt polymers include methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-methoxypolyethylene glycol methacrylate copolymer (Polyquaternium-49), and methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-hydroxyethyl methacrylate copolymer (Polyquaternium-48). Examples of quaternized dialkylaminoalkyl (meth)acrylate polymers include vinylpyrrolidone-N,N-dimethylaminoethyl diethyl methacrylate sulfate copolymer (Polyquaternium-11) and N,N-dimethylaminoethyl diethyl methacrylate sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (Polyquaternium-52). Examples of diallyl quaternized ammonium salt polymers include dimethyldiallylammonium chloride polymer (Polyquaternium-6), dimethyldiallylammonium chloride-acrylic acid copolymer (Polyquaternium-22), dimethyldiallylammonium chloride-acrylamide copolymer (Polyquaternium-7), and acrylamide-acrylic acid-dimethyldiallylammonium chloride copolymer (Polyquaternium-39).

[0018] Examples of methacrylamide propyl trimethyl ammonium salt polymers include methacrylamide propyl trimethyl ammonium chloride polymer, vinylpyrrolidone-methacrylamidopropyl trimethyl ammonium chloride copolymer, acrylic acid-methyl acrylate-methacrylamidopropyl trimethyl ammonium chloride copolymer (Polyquaternium-47), and acrylic acid-acrylamide-methacrylamidopropyl trimethyl ammonium chloride copolymer (Polyquaternium-53).

[0019] From the viewpoint of improving film-forming ability, improving the texture of the object to be treated, improving the effect of improving that texture and the durability of that effect, and particularly improving the effect of preventing hair tangles when used in hair treatment and the durability of that effect, component (A) is preferably a polymer containing a structural unit represented by the following general formula (1): [ka] In formula (1), R 1 is a hydrogen atom or a methyl group, and R 2 ~R 4 are each independently an alkyl group having 1 to 4 carbon atoms, X is -O- or -NH-, and m is a number of 1 to 4.

[0020] R in general formula (1) 1 is preferably a methyl group, and R 2 ~R 4 are each independently preferably an alkyl group having 1 to 3 carbon atoms, more preferably a methyl group or an ethyl group, and even more preferably a methyl group. In the general formula (1), X is preferably —O—, and m is preferably 1 or more and 3 or less, more preferably 2 or more and 3 or less.

[0021] Examples of the structural unit represented by general formula (1) include one or more structural units selected from the group consisting of structural units derived from methacryloylethyltrimethylammonium salts, structural units derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate, and structural units derived from methacrylamidepropyltrimethylammonium salts, and preferably one or more structural units selected from the group consisting of structural units derived from methacryloylethyltrimethylammonium salts and structural units derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate.

[0022] Component (A) may be a polymer containing other structural units in addition to the structural unit represented by general formula (1). Examples of such other structural units include structural units derived from vinyl monomers such as vinylpyrrolidone, amphoteric monomers such as (meth)acryloylethyldimethylbetaine, alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, and acrylamides such as N,N-dimethylacrylamide. Component (A) may also be a crosspolymer crosslinked with polyethylene glycol di(meth)acrylate or the like.

[0023] In component (A), the content of the structural unit represented by general formula (1) is preferably 8.0 mol % or more and 100 mol % or less of all structural units constituting component (A), from the viewpoints of improving film-forming ability, improving the texture of the object to be treated, improving the effect of improving that texture and the durability of that effect, and particularly improving the effect of inhibiting hair tangles when used in hair treatment and the durability of that effect.

[0024] Furthermore, component (A) is preferably a polymer having a crosslinked structure. The crosslinked structure here refers to a three-dimensional network structure in which polymer chains, which are the main structure, are linked within or between polymer chains. The method for forming the crosslinked structure is not particularly limited, and examples include methods in which crosslinking is performed simultaneously with polymerization, such as polycondensation or radical polymerization, or methods in which polymer chains are crosslinked later.

[0025] Component (A) may be used alone or in combination of two or more. Among the above, from the viewpoint of easily achieving a predetermined value or more in viscosity at 30°C of a 1% by mass aqueous solution, improving the texture of the treated object and improving the durability of said effect, and particularly improving the effect of preventing hair tangles when used in hair treatment and improving the durability of said effect, component (A) is preferably one or more selected from the group consisting of methacryloylethyltrimethylammonium salt polymers and quaternized dialkylaminoalkyl(meth)acrylate polymers, more preferably methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-methoxypolyethylene glycol methacrylate copolymer (Polyquaternium-49), The copolymer is at least one selected from the group consisting of methacryloylethyl dimethyl betaine-methacryloylethyl trimethylammonium chloride-2-hydroxyethyl methacrylate copolymer (Polyquaternium-48) and N,N-dimethylaminoethyl diethyl methacrylate sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (Polyquaternium-52), more preferably at least one selected from the group consisting of methacryloylethyl trimethylammonium chloride polymer (Polyquaternium-37) and N,N-dimethylaminoethyl diethyl methacrylate sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (Polyquaternium-52).

[0026] Commercially available polymers can also be used as component (A). Specific examples include "Cosmedia Ultragel 300" (Polyquaternium-37, cationic charge density: 4.81 mmol / g) manufactured by BASF Japan Ltd., and "SOFCARE KG-101W-E" (Polyquaternium-52, cationic charge density: 0.83 mmol / g) and "SOFCARE KG-301W" (Polyquaternium-52, cationic charge density: 1.84 mmol / g) manufactured by Kao Corporation. These are all cationic polymers with a crosslinked structure.

[0027] (Component (B): Anionic Polymer) Component (B) is a polymer capable of forming a polyion complex through interaction with component (A). In this specification, "anionic polymer" refers to a polymer that has anionic groups and is substantially free of cationic groups and amphoteric groups. "Substantially free of cationic groups and amphoteric groups" means that the molar ratio of cationic groups and amphoteric groups to anionic groups is preferably 0.1% or less.

[0028] The anionic group contained in component (B) is preferably an acidic group such as a carboxyl group, a sulfonic acid group, or a phosphate group, and is more preferably a carboxyl group from the viewpoint of facilitating the formation of a polyion complex through interaction with component (A) and from the viewpoint of availability. Note that in component (B), at least a portion of the anionic group may be neutralized and in the form of a salt.

[0029] <Component (B1): Crosslinked polymer containing structural units derived from (meth)acrylic acid, anionic polysaccharide> From the viewpoint of improving the texture of the object to be treated and improving the durability of this effect, particularly the effect of inhibiting hair tangles when used in hair treatment and improving the durability of this effect, it is preferable that component (B) contains (B1) one or more members selected from the group consisting of crosslinked polymers containing structural units derived from (meth)acrylic acid and anionic polysaccharides.

[0030] Among the components (B1), the crosslinked polymer containing a structural unit derived from (meth)acrylic acid may be a homopolymer or copolymer of (meth)acrylic acid, or a salt thereof, having a crosslinked structure. The crosslinked structure referred to here means a three-dimensional network structure in which polymer chains, which are the main structure of the polymer, are linked within or between polymer chains. The method for forming the crosslinked structure is not particularly limited, and examples thereof include those formed by a method in which crosslinking is performed simultaneously with polymerization, such as polycondensation or radical polymerization, or a method in which polymer chains are crosslinked afterward. Examples of the homopolymer of (meth)acrylic acid include polyacrylic acid, polymethacrylic acid, and salts thereof. Examples of the copolymer of (meth)acrylic acid include (meth)acrylic acid / maleic acid copolymer, (meth)acrylic acid / itaconic acid copolymer, (meth)acrylic acid / fumaric acid copolymer, (meth)acrylic acid / vinyl acetate copolymer, (meth)acrylic acid / (meth)acrylic acid alkyl ester copolymer, (meth)acrylic acid / 2-hydroxyethyl methacrylate copolymer, acrylic acid / acrylic acid alkyl ester / (N-alkyl)acrylamide copolymer, and salts thereof, and one or more of these may be used. Among the above, the (meth)acrylic acid copolymer is preferably a (meth)acrylic acid / (meth)acrylic acid alkyl ester, and more preferably an acrylic acid / acrylic acid alkyl ester. The (meth)acrylic acid alkyl ester includes a (meth)acrylic acid alkyl ester having an alkyl carbon number of preferably 1 or more, more preferably 4 or more, and even more preferably 8 or more, and preferably 40 or less, more preferably 36 or less, and even more preferably 32 or less.

[0031] Specific examples of crosslinked polymers containing structural units derived from (meth)acrylic acid include carboxyvinyl polymers or salts thereof, (acrylates / C10-30 alkyl acrylate) crosspolymers, (sodium acrylate / acryloyldimethyltaurine / dimethylacrylamide) crosspolymers, and acrylates crosspolymer-4.

[0032] Among the component (B1), the anionic polysaccharides include polysaccharides having a carboxy group (hyaluronic acid, alginic acid, pectinic acid, carboxymethylcellulose, xanthan gum, etc.), polysaccharide sulfates (carrageenan, keratan sulfate, dermatan sulfate, sulfated starch, heparin, heparan sulfate), and salts thereof, and one or more of these can be used. Among the above, from the viewpoint of improving the texture of the object to be treated and improving the durability of said effect, particularly the effect of inhibiting hair entanglement when used in hair treatment and improving the durability of said effect, the anionic polysaccharide is preferably a polysaccharide having a carboxy group or a salt thereof, more preferably alginic acid, carboxymethylcellulose, or a salt thereof, and even more preferably alginic acid or a salt thereof.

[0033] When component (B1) is a salt, examples of the salt include alkali metal salts such as sodium salts and potassium salts, and alkaline earth metal salts, and from the viewpoint of availability, alkali metal salts are preferred.

[0034] Among the above, from the viewpoint of improving the texture of the object to be treated and improving the durability of said effect, particularly the effect of preventing hair entanglement when used in hair treatment and improving the durability of said effect, component (B1) is preferably one or more selected from the group consisting of carboxyvinyl polymer, (acrylates / C10-30 alkyl acrylate) crosspolymer, and anionic polysaccharide, more preferably anionic polysaccharide or a salt thereof, and even more preferably alginic acid or a salt thereof.

[0035] The anionic charge density of component (B1) is not particularly limited, but from the viewpoint of facilitating the formation of a polyion complex through interaction with component (A), and from the viewpoint of improving the texture of the treated object and improving the durability of said effect, particularly the effect of preventing hair entanglement when used in hair treatment and improving its durability, it is preferably 1.0 mmol / g or more, more preferably 2.0 mmol / g or more, even more preferably 3.5 mmol / g or more, and from the viewpoint of improving the texture of the treated object and improving its durability, particularly the effect of preventing hair entanglement when used in hair treatment and improving its durability, it is preferably 25 mmol / g or less, more preferably 20 mmol / g or less, even more preferably 15 mmol / g or less. The anionic charge density of component (B1) is preferably 1.0 mmol / g or more and 25 mmol / g or less, more preferably 2.0 mmol / g or more and 20 mmol / g or less, even more preferably 3.5 mmol / g or more and 15 mmol / g or less. The anionic charge density of component (B1) is the number of moles of anionic groups contained per gram of polymer. If at least a portion of the anionic groups of component (B1) are in the form of neutralized salts, the number of moles of anionic groups mentioned above includes the number of moles of anionic groups in the form of salts. Two or more polymers may be used as component (B1). In this case, the anionic charge density of component (B1) is determined by calculating a weighted average from the anionic charge density and blending amount of each polymer.

[0036] When component (B1) is an anionic polysaccharide, its weight-average molecular weight (Mw) is preferably 2,000 or more, more preferably 10,000 or more, even more preferably more than 30,000, and even more preferably 50,000 or more, from the viewpoint of improving film-forming ability. Furthermore, from the viewpoint of facilitating the formation of a polyion complex through interaction with component (A), improving the texture of the treated object and improving its durability, and particularly improving the hair entanglement suppression effect and its durability when used in hair treatment, the weight-average molecular weight (Mw) is preferably 3.5 million or less, more preferably 3 million or less. The weight-average molecular weight (Mw) of the anionic polysaccharide of component (B1) is preferably 2,000 or more and 3.5 million or less, more preferably 10,000 or more and 3 million or less, even more preferably more than 30,000 and 3 million or less, and even more preferably 50,000 or more and 3 million or less. The weight average molecular weight of the component (B1) can be measured by gel permeation chromatography (GPC).

[0037] The content of component (B1) in component (B) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and still more preferably 80% by mass or more, but 100% by mass or less, from the viewpoints of improving film-forming ability, facilitating the formation of a polyion complex through interaction with component (A), improving the texture of the object to be treated and improving the durability of said effect, and particularly improving the effect of suppressing hair tangles when used in hair treatment and improving the durability of said effect.

[0038] <Component (B2): Anionic polymer other than component (B1)> From the viewpoint of further improving the texture-improving effect on the treated object and the durability of this effect, particularly from the viewpoint of improving the effect of preventing hair tangles when used in hair treatment and the durability of this effect, it is preferable that component (B) further contains (B2), an anionic polymer other than component (B1). It is believed that component (B2) forms hydrogen bonds with the nonionic polymer (C) complexed with the crosslinked structure in the polyion complex, thereby immobilizing component (C) within the crosslinked structure of the polyion complex formed by component (A) and component (B). This effect is thought to make it easier for component (C) to remain in the film rather than being washed away even when rinsing or washing is performed after treating an object with the composition of the present invention, thereby improving the durability of the treatment effect.

[0039] From the viewpoint of contributing to the fixation of component (C) and further improving the texture-improving effect on the object to be treated and the durability of said effect, particularly from the viewpoint of improving the effect of inhibiting hair entanglement when used in hair treatment and the durability of said effect, the molecular weight of component (B2) is preferably 1,000 or more, more preferably 2,000 or more, even more preferably 5,000 or more, still more preferably 10,000 or more, and is preferably 50,000 or less, more preferably 40,000 or less, and even more preferably 30,000 or less. The molecular weight of component (B2) is preferably 1,000 to 50,000, more preferably 1,000 to 30,000, even more preferably 2,000 to 30,000, still more preferably 5,000 to 30,000, and even more preferably 10,000 to 30,000. The term "molecular weight" used herein means the weight average molecular weight, which can be measured by gel permeation chromatography (GPC).

[0040] Component (B2) is preferably a polymer having a carboxy group and a molecular weight of 1,000 or more and 50,000 or less, more preferably 1,000 or more and 30,000 or less, and more preferably a non-crosslinked polymer having a molecular weight of 1,000 or more and 30,000 or less and containing a structural unit derived from (meth)acrylic acid. Examples of non-crosslinked polymers containing structural units derived from (meth)acrylic acid that are suitable for use as component (B2) include poly(meth)acrylic acid, as well as (meth)acrylic acid / maleic acid copolymers, (meth)acrylic acid / itaconic acid copolymers, (meth)acrylic acid / fumaric acid copolymers, (meth)acrylic acid / vinyl acetate copolymers, (meth)acrylic acid / (meth)acrylic acid alkyl ester copolymers, (meth)acrylic acid / 2-hydroxyethyl methacrylate copolymers, acrylic acid / acrylic acid alkyl ester / (N-alkyl)acrylamide copolymers, and salts thereof, and one or more of these can be used. Other polymers having a carboxy group that are suitable for use as component (B2) include polymaleic acid, maleic acid / diisobutylene copolymers, maleic acid / styrene copolymers, benzoic acid formaldehyde condensates, benzoic acid / phenol / formaldehyde condensates, and salts thereof.

[0041] Among the above, from the viewpoint of further improving the texture improving effect on the treated object and the durability of said effect, particularly from the viewpoint of improving the effect of inhibiting hair entanglement when used in hair treatment and the durability of said effect, component (B2) is preferably one or more selected from the group consisting of poly(meth)acrylic acid, (meth)acrylic acid / (meth)acrylic acid alkyl ester copolymer, and salts thereof.

[0042] Examples of poly(meth)acrylic acid or a salt thereof include polyacrylic acid, polymethacrylic acid, and salts thereof, with polyacrylic acid or a salt thereof being preferred. The (meth)acrylic acid / (meth)acrylic acid alkyl ester copolymer or its salt is more preferably an acrylic acid / acrylic acid alkyl ester or its salt. The (meth)acrylic acid alkyl ester includes a (meth)acrylic acid alkyl ester having an alkyl carbon number of preferably 1 or more, more preferably 4 or more, even more preferably 8 or more, still more preferably 12 or more, and preferably 40 or less, more preferably 36 or less, even more preferably 32 or less, and still more preferably 24 or less. The (meth)acrylic acid / (meth)acrylic acid alkyl ester is preferably an acrylic acid / acrylic acid alkyl ester, more preferably one or more selected from the group consisting of an (acrylic acid / octyl acrylate) copolymer and an (acrylic acid / stearyl acrylate) copolymer, and even more preferably an (acrylic acid / stearyl acrylate) copolymer.

[0043] When component (B2) is a salt, examples of the salt include alkali metal salts such as sodium salts and potassium salts, and alkaline earth metal salts, and from the viewpoint of availability, alkali metal salts are preferred.

[0044] The anionic charge density of component (B2) is not particularly limited, but from the viewpoint of further improving the texture-improving effect on the treated object and the durability of said effect, particularly from the viewpoint of improving the effect of inhibiting hair entanglement when used in hair treatment and the durability of said effect, it is preferably 1.0 mmol / g or more, more preferably 3.0 mmol / g or more, even more preferably 5.0 mmol / g or more, and is preferably 25 mmol / g or less, more preferably 20 mmol / g or less, even more preferably 15 mmol / g or less. The anionic charge density of component (B2) is preferably 1.0 mmol / g or more and 25 mmol / g or less, more preferably 3.0 mmol / g or more and 20 mmol / g or less, even more preferably 5.0 mmol / g or more and 15 mmol / g or less. Two or more polymers may be used as component (B2). In this case, the anionic charge density of component (B2) is determined by calculating a weighted average from the anionic charge density and blending amount of each polymer.

[0045] When component (B) contains component (B2), the content of component (B2) in component (B) is preferably 1% by mass or more, more preferably 2% by mass or more, even more preferably 3% by mass or more, still more preferably 5% by mass or more, and is preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, and still more preferably 20% by mass or less, from the viewpoint of further improving the texture-improving effect on the treated object and the durability of said effect, particularly from the viewpoint of improving the effect of inhibiting hair entanglement when used in hair treatment and the durability of said effect. The content of component (B2) in component (B) is preferably 1% by mass or more and 50% by mass or less, more preferably 2% by mass or more and 40% by mass or less, even more preferably 3% by mass or more and 30% by mass or less, and still more preferably 5% by mass or less and 20% by mass or less.

[0046] Furthermore, when component (B) contains component (B1) and component (B2), the mass ratio of component (B2) to the total amount of component (B1) and component (B2) [(B2) / {(B1)+(B2)}] is preferably 0.01 or more, more preferably 0.02 or more, even more preferably 0.05 or more, and still more preferably 0.08 or more from the viewpoint of the effect of improving the texture of the object to be treated and the durability of said effect, particularly the effect of suppressing hair tangles when used in hair treatment and the durability of said effect; and from the viewpoint of the ease of forming a polyion complex with component (A), it is preferably 1.0 or less, more preferably 0.80 or less, even more preferably 0.50 or less, and still more preferably 0.30 or less. The mass ratio [(B2) / {(B1)+(B2)}] is preferably 0.01 or more and 1.0 or less, more preferably 0.02 or more and 0.80 or less, even more preferably 0.05 or more and 0.50 or less, and even more preferably 0.08 or more and 0.30 or less.

[0047] (Component (C): Nonionic polymer) The composition of the present invention contains a nonionic polymer as component (C). As used herein, the term "nonionic polymer" refers to a polymer that is substantially free of ionic groups, such as cationic groups, anionic groups, and amphoteric groups.

[0048] Examples of component (C) include polyalkylene glycol or a derivative thereof, a polymer containing a structural unit derived from vinylpyrrolidone, a polymer containing a structural unit derived from a (meth)acrylic acid ester, polyvinyl alcohol, polyacrylamide, polycaprolactam, and the like, and one or more of these can be used.

[0049] Examples of polyalkylene glycols include homopolymers or copolymers of alkylene glycols having an alkylene carbon number of 2 to 6, preferably 2 to 4, and more preferably 2 to 3. Specific examples include polyethylene glycol, polypropylene glycol, polytrimethylene ether glycol, polytetramethylene ether glycol, polyethylene glycol-polypropylene glycol copolymer (polyoxyethylene polyoxypropylene glycol), polyethylene glycol-polytrimethylene ether glycol copolymer, polyethylene glycol-polytetramethylene ether glycol copolymer, and polypropylene glycol-polytetramethylene ether glycol copolymer. Among these, from the viewpoints of improving the texture of the object to be treated and improving the durability of said effect, particularly improving the effect of preventing hair tangles when used in hair treatment and improving the durability of said effect, and from the viewpoints of availability, preferred are one or more selected from the group consisting of polyethylene glycol, polypropylene glycol, and polyethylene glycol-polypropylene glycol copolymer, and more preferred are one or more selected from the group consisting of polyethylene glycol and polyethylene glycol-polypropylene glycol copolymer.

[0050] Examples of polyalkylene glycol derivatives include terminally modified products of the above-mentioned polyalkylene glycols, such as polyalkylene glycol monoalkyl ethers, polyalkylene glycol dialkyl ethers, polyalkylene glycol monoaryl ethers, polyalkylene glycol diaryl ethers, polyalkylene glycol mono-fatty acid esters, polyalkylene glycol di-fatty acid esters, polyalkylene glycol diglycidyl ethers, etc. Among these, from the viewpoint of the effect of improving the texture of the object to be treated and the durability of said effect, particularly the effect of suppressing hair entanglement when used in hair treatment and the durability of said effect, and from the viewpoint of availability, preferred are one or more selected from the group consisting of polyalkylene glycol monoalkyl ethers, polyalkylene glycol di-alkyl ethers, polyalkylene glycol mono-fatty acid esters, and polyalkylene glycol di-fatty acid esters, and more preferred are one or more selected from the group consisting of polyalkylene glycol mono-fatty acid esters and polyalkylene glycol di-fatty acid esters. The number of carbon atoms in the alkyl group in the mono- or di-alkyl ether of polyalkylene glycol and the number of carbon atoms in the fatty acid in the mono- or di-fatty acid ester of polyalkylene glycol are preferably 1 or more and 36 or less, more preferably 4 or more and 32 or less, even more preferably 8 or more and 24 or less, and still more preferably 12 or more and 22 or less. The number of carbon atoms in the aryl group in the mono- or diaryl ether of polyalkylene glycol is preferably 6 or more and 36 or less, more preferably 6 or more and 32 or less, even more preferably 6 or more and 24 or less, and still more preferably 6 or more and 22 or less.

[0051] Specific examples of polyalkylene glycol derivatives include polyethylene glycol monomethyl ether, polyethylene glycol dimethyl ether, polyethylene glycol monobutyl ether, polyethylene glycol dibutyl ether, polyethylene glycol monooctyl ether, polyethylene glycol monodecyl ether, polyethylene glycol monododecyl ether, polyethylene glycol monotridecyl ether, polyethylene glycol-bisphenol A ether, polyethylene glycol dilaurate, polyethylene glycol distearate (polyethylene glycol distearate), polyethylene glycol diglycidyl ether, polyethylene glycol-polypropylene glycol-monomethyl ether, polyethylene glycol-polypropylene glycol-dimethyl ether, polyethylene glycol-polypropylene glycol-monobutyl ether, polyethylene glycol-polypropylene glycol-dibutyl ether, polyethylene glycol-polypropylene glycol-monoctyl ether, polyethylene glycol-polypropylene glycol-monodecyl ether, polyethylene glycol-polypropylene glycol-monododecyl ether, polyethylene glycol-polypropylene glycol-monotridecyl ether, polyethylene glycol-polypropylene glycol-bisphenol A ether, polyethylene glycol-polypropylene glycol-dilaurate, polyethylene glycol distearate-polypropylene glycol, and polyethylene glycol-polypropylene glycol-diglycidyl ether. One or more of these may be used.

[0052] Examples of polymers containing structural units derived from vinylpyrrolidone include homopolymers of vinylpyrrolidone and copolymers of vinylpyrrolidone and nonionic monomers, such as polyvinylpyrrolidone, vinylpyrrolidone / vinyl acetate copolymers, and vinylpyrrolidone / methacrylamide / vinylimidazole copolymers.

[0053] Examples of polymers containing structural units derived from (meth)acrylic acid esters include homopolymers of (meth)acrylic acid esters and copolymers of (meth)acrylic acid esters with nonionic monomers such as (meth)acrylamide, dimethylacrylamide, vinyl acetate, vinyl methyl ether, etc. Examples of (meth)acrylic acid esters include the above-mentioned (meth)acrylic acid alkyl esters, as well as (meth)acrylic acid hydroxyalkyl esters and (meth)acrylic acid alkyl ethers. Specific examples of polymers containing structural units derived from (meth)acrylic acid esters include (dimethylacrylamide / hydroxyethyl acrylate / methoxyethyl acrylate) copolymers and (hydroxyethyl acrylate / methoxyethyl acrylate) copolymers.

[0054] Among the above, from the viewpoint of improving the texture of the object to be treated and improving the durability of said effect, particularly improving the effect of preventing hair entanglement when used in hair treatment and improving the durability of said effect, as well as from the viewpoint of availability, component (C) is preferably one or more selected from the group consisting of polyalkylene glycols or derivatives thereof, and polymers containing structural units derived from vinylpyrrolidone, more preferably one or more selected from the group consisting of polyethylene glycol, polypropylene glycol, polyethylene glycol-polypropylene glycol copolymers, mono- or di-fatty acid esters thereof, and polyvinylpyrrolidone, and even more preferably one or more selected from the group consisting of polyethylene glycol, polyethylene glycol-polypropylene glycol copolymers, mono- or di-fatty acid esters thereof, and polyvinylpyrrolidone.

[0055] The weight-average molecular weight (Mw) of component (C) is preferably 2,000 or more, more preferably 5,000 or more, even more preferably 10,000 or more, and is preferably 2,000,000 or less, more preferably 1,500,000 or less, from the viewpoints of improving the texture of the object to be treated and the durability of that effect, particularly the effect of preventing hair tangles when used in hair treatment and the durability of that effect, and from the viewpoint of availability. The weight-average molecular weight of component (C) is preferably 2,000 or more and 2,000,000 or less, more preferably 5,000 or more and 1,500,000 or less, even more preferably 10,000 or more and 1,500,000 or less. The weight average molecular weight of component (C) can be measured by gel permeation chromatography (GPC).

[0056] (water) The composition of the present invention is an aqueous composition and therefore contains water. The water is preferably deionized water or distilled water. However, tap water, groundwater, or the like sterilized with hypochlorous acid or the like may also be used as long as the stability of the composition is not impaired.

[0057] (Content) The content or blending amount of each component in the aqueous composition is preferably as follows, from the viewpoint of improving the texture of the object to be treated and improving the durability of said effect, particularly from the viewpoint of improving the effect of inhibiting hair tangles when used in hair treatment and improving the durability of said effect.

[0058] The content of component (A) in the aqueous composition is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and even more preferably 0.2% by mass or more, from the viewpoints of ease of polyion complex formation, texture improvement effect on the treated object and durability of said effect, particularly hair entanglement suppression effect when used in hair treatment and durability of said effect. Also, from the viewpoint of stability of the aqueous composition, it is preferably 3.0% by mass or less, more preferably 2.5% by mass or less, even more preferably 2.0% by mass or less, still more preferably 1.5% by mass or less, and even more preferably 1.0% by mass or less. The content of component (A) in the aqueous composition is preferably 0.01% by mass or more and 3.0% by mass or less, more preferably 0.02% by mass or more and 2.5% by mass or less, even more preferably 0.05% by mass or more and 2.0% by mass or less, still more preferably 0.1% by mass or more and 1.5% by mass or less, even more preferably 0.2% by mass or more and 1.5% by mass or less, and still more preferably 0.2% by mass or more and 1.0% by mass or less.

[0059] The content of component (B) in the aqueous composition is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.02% by mass or more, and still more preferably 0.04% by mass or more, from the viewpoints of ease of polyion complex formation, texture improvement effect on the treated object and durability of said effect, particularly hair entanglement suppression effect when used in hair treatment and durability of said effect. Also, from the viewpoint of stability of the aqueous composition, it is preferably 3.0% by mass or less, more preferably 2.0% by mass or less, even more preferably 1.5% by mass or less, still more preferably 1.0% by mass or less, still more preferably 0.5% by mass or less, still more preferably 0.3% by mass or less, still more preferably 0.2% by mass or less, and still more preferably 0.1% by mass or less. The content of component (B) in the aqueous composition is preferably 0.005% by mass or more and 3.0% by mass or less, more preferably 0.01% by mass or more and 2.0% by mass or less, even more preferably 0.02% by mass or more and 1.5% by mass or less, still more preferably 0.02% by mass or more and 1.0% by mass or less, still more preferably 0.02% by mass or more and 0.5% by mass or less, still more preferably 0.02% by mass or more and 0.3% by mass or less, still more preferably 0.02% by mass or more and 0.3% by mass or less, still more preferably 0.02% by mass or more and 0.2% by mass or less, still more preferably 0.02% by mass or more and 0.1% by mass or less, and still more preferably 0.04% by mass or more and 0.1% by mass or less.

[0060] The total content of component (A) and component (B) in the aqueous composition is preferably 0.02% by mass or more, more preferably 0.04% by mass or more, even more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, and still more preferably 0.3% by mass or more, from the viewpoint of improving the texture of the object to be treated and improving the durability of said effect, particularly the effect of inhibiting hair entanglement when used in hair treatment and improving the durability of said effect. Also, from the viewpoint of the stability of the aqueous composition, it is preferably 5.0% by mass or less, more preferably 4.0% by mass or less, still more preferably 3.0% by mass or less, and still more preferably 2.0% by mass or less. The total content of component (A) and component (B) in the aqueous composition is preferably 0.02% by mass or more and 5.0% by mass or less, more preferably 0.04% by mass or more and 4.0% by mass or less, even more preferably 0.05% by mass or more and 3.0% by mass or less, still more preferably 0.1% by mass or more and 2.0% by mass or less, still more preferably 0.2% by mass or more and 2.0% by mass or less, and still more preferably 0.3% by mass or more and 2.0% by mass or less.

[0061] From the viewpoints of ease of forming a polyion complex, the effect of improving the texture of the object to be treated and the durability of that effect, and particularly the effect of suppressing hair entanglement when used in hair treatment and the durability of that effect, the content ratio of component (A) to component (B) in the aqueous composition [(A) / (B)] is preferably 1.0 or more, more preferably 2.0 or more, even more preferably 3.0 or more, still more preferably 4.0 or more, even more preferably 5.0 or more, and is preferably 30 or less, more preferably 20 or less, even more preferably 15 or less, still more preferably 12 or less, and even more preferably 10 or less. The mass ratio [(A) / (B)] is preferably 1.0 or more and 30 or less, more preferably 2.0 or more and 20 or less, even more preferably 3.0 or more and 15 or less, still more preferably 4.0 or more and 12 or less, and even more preferably 5.0 or more and 10 or less. In the aqueous composition of the present invention, the mass ratio of component (A) to component (B) has a dominant effect on the effects of the present invention, rather than the cationic charge / anionic charge ratio of component (A) to component (B).

[0062] The ratio of the number of moles of cationic charge of component (A) to the number of moles of anionic charge of component (B) in the aqueous composition is preferably 10 / 90 to 95 / 5, more preferably 20 / 80 to 95 / 5, and even more preferably 25 / 75 to 90 / 10, from the viewpoint of improving the texture of the object to be treated and the durability of said effect, particularly the effect of inhibiting hair tangles when used in hair treatment and the durability of said effect.

[0063] The content of component (C) in the aqueous composition is preferably 0.02% by mass or more, more preferably 0.04% by mass or more, even more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, and still more preferably 0.3% by mass or more, from the viewpoint of improving the texture of the object to be treated and improving the durability of said effect, particularly the effect of inhibiting hair entanglement when used in hair treatment and improving the durability of said effect. Also, from the viewpoint of the stability of the aqueous composition, it is preferably 5.0% by mass or less, more preferably 4.0% by mass or less, still more preferably 3.0% by mass or less, and still more preferably 2.0% by mass or less. The content of component (C) in the aqueous composition is preferably 0.02% by mass or more and 5.0% by mass or less, more preferably 0.04% by mass or more and 4.0% by mass or less, even more preferably 0.05% by mass or more and 3.0% by mass or less, still more preferably 0.1% by mass or more and 2.0% by mass or less, still more preferably 0.2% by mass or more and 2.0% by mass or less, and still more preferably 0.3% by mass or more and 2.0% by mass or less.

[0064] The mass ratio of component (C) to the total amount of component (A) and component (B) in the aqueous composition [(C) / {(A)+(B)}] is preferably 0.2 or more, more preferably 0.3 or more, even more preferably 0.4 or more, still more preferably 0.5 or more, still more preferably 0.6 or more, still more preferably 0.8 or more, from the viewpoint of improving the texture of the object to be treated and improving the durability of said effect, particularly the effect of suppressing hair tangles when used in hair treatment and improving the durability of said effect, and is also preferably 20 or less, more preferably 15 or less, still more preferably 10 or less, still more preferably 8.0 or less, still more preferably 5.0 or less, still more preferably 2.0 or less, still more preferably 1.5 or less. The mass ratio [(C) / {(A)+(B)}] is preferably 0.2 or more and 20 or less, more preferably 0.3 or more and 15 or less, even more preferably 0.4 or more and 10 or less, still more preferably 0.5 or more and 8.0 or less, still more preferably 0.6 or more and 5.0 or less, still more preferably 0.8 or more and 2.0 or less, and still more preferably 0.8 or more and 1.5 or less.

[0065] The content of water in the aqueous composition is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and still more preferably 90% by mass or more, from the viewpoint of forming an aqueous composition and the stability of the composition. The content of water in the aqueous composition may be the remainder of components (A) to (C).

[0066] In addition, the composition of the present invention may contain, as optional components, preservatives, pH adjusters (acids, bases, or salts thereof), salt compounds (sodium chloride, etc.), aqueous media other than water, and the like.

[0067] (pH) From the viewpoint of safety when applied to the body, the pH of the aqueous composition is preferably 3.0 or higher, more preferably 3.2 or higher, as calculated by diluting the aqueous composition 20 times with water at 25° C. Furthermore, from the viewpoint of improving the texture of the object to be treated and improving the durability of said effect, particularly improving the effect of inhibiting hair tangles when used in hair treatment and improving the durability of said effect, and from the viewpoint of the stability of the aqueous composition, the pH is preferably 7.5 or lower, more preferably 7.0 or lower, even more preferably 6.0 or lower, and still more preferably 5.0 or lower. The pH can be measured using a pH meter according to the method described in the Examples.

[0068] (Method of producing aqueous composition) The method for producing the composition of the present invention is not particularly limited, but from the viewpoints of the stability of the aqueous composition, the effect of improving the texture of the object to be treated and the durability of this effect, particularly the effect of preventing hair entanglement when used in hair treatment and the durability of this effect, the stability of the aqueous composition, and production efficiency, a method comprising the steps of dissolving or dispersing components (B) and (C) in water to prepare a mixed solution containing components (B) and (C), and then mixing this mixed solution with component (A) or an aqueous solution thereof. This method allows component (C) to be held within the crosslinked structure formed by the ionic interaction between components (A) and (B), thereby efficiently forming a network structure. When a pH adjuster is added, it is preferable to add the pH adjuster to the mixed solution containing component (B) and component (C) to adjust the pH to the desired level, and then mix it with component (A) or an aqueous solution thereof.

[0069] The mixing conditions for mixing components (A) to (C) are not particularly limited, and mixing can generally be carried out at 5 to 60° C. for 0.1 to 12 hours using a known stirring device.

[0070] [Cosmetic composition] The present invention further provides a cosmetic composition containing the aqueous body composition. By applying the cosmetic composition of the present invention to an object to be treated, the texture of the object to be treated can be improved and the effect of improving the texture can be improved for a long time. In particular, when the cosmetic composition of the present invention is used for hair treatment, the effect of preventing hair tangles can be improved and the effect of preventing hair tangles can be improved and the effect of improving the texture can be improved and the effect of improving the texture can be improved and the effect of improving the texture can be improved. The types of cosmetic compositions include skin cosmetic compositions and hair cosmetic compositions, and from the viewpoint of improving the effect of preventing hair tangles and the duration of that effect, hair cosmetic compositions are preferred.

[0071] The aqueous body composition may be used as a cosmetic composition as is. Alternatively, the aqueous body composition may be used as a premix for a cosmetic composition. For example, various cosmetic compositions may be prepared by blending additional components into the aqueous composition. In the aqueous composition, components (A) to (C) are present stably in the form of the network described above, and the network is unlikely to be destroyed even when additional components are blended in. Therefore, it is believed that a cosmetic composition containing the aqueous composition can maintain the effect of improving the texture of the treated object and the effect of improving the durability of this effect.

[0072] The content of the aqueous composition for body use in the cosmetic composition is usually 1% by mass or more and 80% by mass or less, and preferably 10% by mass or more and 60% by mass or less. The contents of components (A) to (C) in the cosmetic composition are preferably in the following ranges.

[0073] The content of component (A) in the cosmetic composition is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, even more preferably 0.01% by mass or more, even more preferably 0.05% by mass or more, from the viewpoint of improving the texture of the treated object and improving the durability of said effect, particularly the effect of inhibiting hair tangles when used in hair treatment and improving the durability of said effect. Furthermore, from the viewpoint of the stability of the composition and ensuring the effects of additional components when blended, the content is preferably 3.0% by mass or less, more preferably 2.0% by mass or less, even more preferably 1.5% by mass or less, and even more preferably 1.0% by mass or less. The content of component (A) in the cosmetic composition is preferably 0.001% by mass or more to 3.0% by mass or less, more preferably 0.005% by mass or more to 2.0% by mass or less, even more preferably 0.01% by mass or more to 1.5% by mass or less, even more preferably 0.05% by mass or more to 1.5% by mass or less, and even more preferably 0.05% by mass or more to 1.0% by mass or less.

[0074] The content of component (B) in the cosmetic composition is preferably 0.0005% by mass or more, more preferably 0.001% by mass or more, even more preferably 0.01% by mass or more, and even more preferably 0.02% by mass or more, from the viewpoints of improving the texture of the object to be treated and improving the durability of said effect, particularly the effect of inhibiting hair entanglement when used in hair treatment and improving the durability of said effect. Furthermore, from the viewpoints of the stability of the composition and ensuring the effects of additional components when blended, the content is preferably 3.0% by mass or less, more preferably 2.0% by mass or less, even more preferably 1.5% by mass or less, still more preferably 1.0% by mass or less, still more preferably 0.5% by mass or less, still more preferably 0.3% by mass or less, still more preferably 0.2% by mass or less, and even more preferably 0.1% by mass or less. The content of component (B) in the cosmetic composition is preferably 0.0005% by mass or more and 3.0% by mass or less, more preferably 0.001% by mass or more and 2.0% by mass or less, even more preferably 0.01% by mass or more and 1.5% by mass or less, still more preferably 0.02% by mass or more and 1.0% by mass or less, even more preferably 0.02% by mass or more and 0.5% by mass or less, still more preferably 0.02% by mass or more and 0.3% by mass or less, still more preferably 0.02% by mass or more and 0.2% by mass or less, and still more preferably 0.02% by mass or more and 0.1% by mass or less.

[0075] The total content of component (A) and component (B) in the cosmetic composition is preferably 0.0015% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.02% by mass or more, and still more preferably 0.05% by mass or more, from the viewpoints of improving the texture of the object to be treated and improving the durability of said effect, particularly the effect of inhibiting hair entanglement when used in hair treatment and improving the durability of said effect. Furthermore, from the viewpoints of the stability of the composition and of ensuring the effects of additional components when blended, the total content is preferably 5.0% by mass or less, more preferably 4.0% by mass or less, even more preferably 2.0% by mass or less, and still more preferably 1.5% by mass or less. The total content of component (A) and component (B) in the cosmetic composition is preferably 0.0015% by mass or more and 5.0% by mass or less, more preferably 0.01% by mass or more and 4.0% by mass or less, even more preferably 0.02% by mass or more and 4.0% by mass or less, still more preferably 0.05% by mass or more and 2.0% by mass or less, and even more preferably 0.05% by mass or more and 1.5% by mass or less.

[0076] The content of component (C) in the cosmetic composition is preferably 0.0015% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.02% by mass or more, and still more preferably 0.05% by mass or more, from the viewpoints of improving the texture of the object to be treated and improving the durability of said effect, particularly the effect of inhibiting hair entanglement when used in hair treatment and improving the durability of said effect. Furthermore, from the viewpoints of the stability of the composition and of ensuring the effects of additional components when blended, the content is preferably 5.0% by mass or less, more preferably 4.0% by mass or less, even more preferably 2.0% by mass or less, and still more preferably 1.5% by mass or less. The content of component (C) in the cosmetic composition is preferably 0.0015% by mass or more and 5.0% by mass or less, more preferably 0.01% by mass or more and 4.0% by mass or less, even more preferably 0.02% by mass or more and 4.0% by mass or less, still more preferably 0.05% by mass or more and 2.0% by mass or less, and even more preferably 0.05% by mass or more and 1.5% by mass or less.

[0077] Additional components that may be incorporated into the cosmetic composition include components that are typically incorporated into skin cosmetic compositions or hair cosmetic compositions, such as surfactants, higher alcohols, oils, organic or inorganic acids, nonionic polymers, aqueous media, pH adjusters, feel improvers, colorants, antioxidants, antidandruff agents, vitamins, disinfectants, anti-inflammatory agents, preservatives, chelating agents, moisturizers, pearlizing agents, ceramides, fragrances, plant extracts, and UV absorbers.

[0078] When the cosmetic composition contains an oily component such as a higher alcohol or an oil, the cosmetic composition may be in the form of an emulsion composition. From the viewpoint of the stability of the composition and the improvement of the feeling in use, the emulsion composition is preferably an oil-in-water emulsion composition. The method for producing a cosmetic composition in the form of an emulsion composition is not particularly limited. Examples include a method of mixing the aqueous composition with an oily phase containing an oily component, and then, if necessary, adding an aqueous phase containing aqueous components other than the aqueous composition and / or other oily components and mixing them; a method of mixing an oily phase containing an oily component with an aqueous phase containing aqueous components other than the aqueous composition, and then, adding the aqueous composition and mixing them; and the like. From the perspective of producing a highly stable emulsion composition, improving the texture of the treated object and improving the durability of said effect, particularly, improving the effect of preventing hair tangles when used in hair treatment and improving the durability of said effect, it is preferred to produce the emulsion composition by a method of mixing the aqueous composition with an oily phase containing an oily component, and then, if necessary, adding an aqueous phase containing aqueous components other than the aqueous composition and / or other oily components and mixing them. Here, "aqueous phase" refers to the phase that constitutes the water phase in the production process of the emulsion composition, and "oily phase" refers to the phase that constitutes the oil phase in the production process of the emulsion composition. The oily components contained in the oily phase herein preferably include ionic surfactants and amphiphilic substances having a hydrophobic group. Examples of ionic surfactants include anionic surfactants, cationic surfactants, and amphoteric surfactants, and examples of amphiphilic substances having a hydrophobic group include higher alcohols. Examples of "aqueous components other than the aqueous composition" include organic acids or inorganic acids, aqueous media, etc., and examples of "other oily components" include oils. Furthermore, other components exemplified as "additional components" can be used appropriately in the emulsion composition.

[0079] Among the cosmetic compositions, examples of product forms of skin cosmetic compositions include body soap, facial cleanser, bath additives, deodorant preparations, makeup cosmetics, sunscreens, makeup bases, emulsions, beauty serums, and creams. Furthermore, examples of product forms of the hair cosmetic composition include hair shampoo, hair rinse, hair conditioner, hair treatment (including leave-in type), hair styling agent, hair color, permanent agent, etc. Among these, from the viewpoint of the effectiveness of the effects of the present invention, hair conditioner, hair treatment, or hair styling agent is preferred.

[0080] [How to treat hair] The present invention further provides a hair treatment method comprising the steps of applying the cosmetic composition to hair and then heating the hair to a temperature of at least 80° C. According to the hair treatment method of the present invention, applying the cosmetic composition to hair and then heating the hair strengthens the hydrogen bonds between component (B) and component (C) in the film formed on the hair surface, which is thought to further improve the durability of the hair tangle prevention effect.

[0081] In the hair treatment method of the present invention, first, the cosmetic composition is applied to the hair. Methods for applying the cosmetic composition include coating, casting, or spraying the cosmetic composition onto the hair, and immersing the hair in the cosmetic composition, and the method of applying the cosmetic composition to the hair is preferred. A specific example of a method for applying a cosmetic composition to hair is to apply the hair shampoo to hair, lather the shampoo on the hair, and then rinse it off. When the cosmetic composition is a hair rinse, hair conditioner, hair treatment, or hair pack, for example, the composition is applied to washed hair, allowed to blend, and then optionally rinsed off. The cosmetic composition may be applied to hair in either a dry or wet state, but is preferably applied to hair in a wet state.

[0082] The amount of the cosmetic composition applied to hair is expressed as a bath ratio (mass of cosmetic composition / dry mass of hair to which it is applied) of preferably 0.005 or more, more preferably 0.01 or more, even more preferably 0.05 or more, and is preferably 20 or less, more preferably 15 or less, even more preferably 12 or less. The cosmetic composition may be applied to the entire head of hair or to a part of the hair.

[0083] After applying the cosmetic composition to the hair, it is preferable to perform a step of rinsing the cosmetic composition with water before heating the hair. In this case, in order to allow the cosmetic composition to fully blend into the hair, a leaving time may be provided after application of the cosmetic composition before rinsing with water. The leaving time is preferably 15 seconds or more, more preferably 30 seconds or more, even more preferably 1 minute or more, and preferably 20 minutes or less, even more preferably 15 minutes or less. The time for rinsing the cosmetic composition with water is preferably 5 seconds to 3 minutes, and the water temperature may be such that it does not place strain on the body, preferably 15°C to 50°C, more preferably 25°C to 45°C. After applying the cosmetic composition, the hair is preferably dried with a towel or a hairdryer, and then heated.

[0084] A preferred method for heating the hair is to use a flat iron. The hair heating temperature is 80°C or higher, preferably 100°C or higher, more preferably 120°C or higher, and even more preferably 140°C or higher, from the viewpoint of further improving the durability of the hair tangle prevention effect. Furthermore, from the viewpoint of suppressing hair damage, the heating temperature is preferably 220°C or lower, more preferably 200°C or lower. Hair treated by the above method tends to maintain its anti-tangle effect even after repeated washing.

[0085] With respect to the above-mentioned embodiments, the present invention discloses the following. <1> An aqueous composition for personal use comprising: (A) a cationic polymer having a viscosity of 1,000 mPa·s or more in a 1% by mass aqueous solution at 30°C; (B) an anionic polymer; (C) a nonionic polymer; and water. <2> The viscosity of a 1% by mass aqueous solution of the component (A) at 30°C is preferably 1,000 mPa·s or more and 100,000 mPa·s or less, more preferably 1,300 mPa·s or more and 80,000 mPa·s or less, even more preferably 1,500 mPa·s or more and 50,000 mPa·s or less, still more preferably 1,700 mPa·s or more and 30,000 mPa·s or less, and still more preferably 1,800 mPa·s or more and 25,000 mPa·s or less, <1> The aqueous composition for body use described above. <3> The cationic charge density of the component (A) is preferably 0.1 mmol / g or more and 20 mmol / g or less, more preferably 0.2 mmol / g or more and 15 mmol / g or less, 0.2 mmol / g or more and 12 mmol / g or less, even more preferably 0.3 mmol / g or more and 10 mmol / g or less, even more preferably 0.3 mmol / g or more and 7.0 mmol / g or less, and even more preferably 0.5 mmol / g or more and 5.0 mmol / g or less, <1> or <2> The aqueous composition for body use described above. <4> the component (A) is one or more selected from the group consisting of cationized polyvinyl alcohol, polyethyleneimine, methacryloylethyltrimethylammonium salt polymers, quaternized dialkylaminoalkyl(meth)acrylate polymers, diallyl quaternized ammonium salt polymers, methacrylamidepropyltrimethylammonium salt polymers, vinylimidazolium trichloride-vinylpyrrolidone copolymers (polyquaternium-16), vinylpyrrolidone-alkylamino(meth)acrylate copolymers, vinylpyrrolidone-alkylamino(meth)acrylate-vinylcaprolactam copolymers, alkylacrylamide-(meth)acrylate-alkylaminoalkylacrylamide-polyethylene glycol(meth)acrylate copolymers, and adipic acid-dimethylaminohydroxypropylethylenetriamine copolymers, each of which has a viscosity of 1,000 mPa·s or more in a 1% by mass aqueous solution at 30°C; <1> ~ <3> 10. The aqueous composition for body use according to claim 1, wherein <5> The component (A) is a polymer containing a structural unit represented by the following general formula (1): <1> ~ <4> 10. The aqueous composition for body use according to claim 1, wherein [ka] In formula (1), R 1 is a hydrogen atom or a methyl group, and R 2 ~R 4 are each independently an alkyl group having 1 to 4 carbon atoms, X is -O- or -NH-, and m is a number of 1 to 4. <6> The structural unit represented by the general formula (1) is at least one selected from the group consisting of a structural unit derived from a methacryloylethyltrimethylammonium salt, a structural unit derived from an N,N-dimethylaminoethyl methacrylate diethyl sulfate, and a structural unit derived from a methacrylamidepropyltrimethylammonium salt, preferably at least one selected from the group consisting of a structural unit derived from a methacryloylethyltrimethylammonium salt and a structural unit derived from an N,N-dimethylaminoethyl methacrylate diethyl sulfate. <5> The aqueous composition for body use described above. <7> In the component (A), the content of the structural unit represented by the general formula (1) is 8.0 mol% or more and 100 mol% or less. <5> or <6> The aqueous composition for body use described above. <8> The component (A) is preferably at least one selected from the group consisting of methacryloylethyltrimethylammonium salt polymers and quaternized dialkylaminoalkyl(meth)acrylate polymers, and more preferably methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-methoxypolyethylene glycol methacrylate copolymer (Polyquaternium-49), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-methacrylate copolymer (Polyquaternium-50), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-methacrylate copolymer (Polyquaternium-60), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-methacrylate copolymer (Polyquaternium-61), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-methacrylate copolymer (Polyquaternium-62), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-methacrylate copolymer (Polyquaternium-63), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-methacrylate copolymer (Polyquaternium-64), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-methacrylate copolymer (Polyquaternium-65 ... hydroxyethyl copolymer (Polyquaternium-48), and N,N-dimethylaminoethyl diethyl methacrylate sulfate·N,N-dimethylacrylamide·polyethylene glycol dimethacrylate copolymer (Polyquaternium-52), more preferably one or more selected from the group consisting of methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37) and N,N-dimethylaminoethyl diethyl methacrylate sulfate·N,N-dimethylacrylamide·polyethylene glycol dimethacrylate copolymer (Polyquaternium-52), <1> ~ <7> 10. The aqueous composition for body use according to claim 1, wherein <9> The component (B) includes (B1) one or more members selected from the group consisting of a crosslinked polymer containing a structural unit derived from (meth)acrylic acid and anionic polysaccharides. <1> ~ <8> 10. The aqueous composition for body use according to claim 1, wherein

[0086] <10> The crosslinked polymer containing a structural unit derived from (meth)acrylic acid is a homopolymer or copolymer of (meth)acrylic acid, or a salt thereof, having a crosslinked structure, preferably at least one selected from the group consisting of a carboxyvinyl polymer or a salt thereof, an (acrylates / C10-30 alkyl acrylate) crosspolymer, a (sodium acrylate / acryloyldimethyltaurine / dimethylacrylamide) crosspolymer, and an acrylates crosspolymer-4. <9> The aqueous composition for body use described above. <11> The anionic polysaccharide is at least one selected from the group consisting of polysaccharides having a carboxy group, polysaccharide sulfates, and salts thereof. <9> or <10> The aqueous composition for body use described above. <12> The component (B1) is preferably one or more selected from the group consisting of carboxyvinyl polymers, (acrylates / C10-30 alkyl acrylate) crosspolymers, and anionic polysaccharides, more preferably anionic polysaccharides or salts thereof, and even more preferably alginic acid or salts thereof. <1> ~ <11> 10. The aqueous composition for body use according to claim 1, wherein <13> The anionic charge density of the component (B1) is preferably 1.0 mmol / g or more and 25 mmol / g or less, more preferably 2.0 mmol / g or more and 20 mmol / g or less, and even more preferably 3.5 mmol / g or more and 15 mmol / g or less. <9> ~ <12> 10. The aqueous composition for body use according to claim 1, wherein <14> The weight-average molecular weight (Mw) of the anionic polysaccharide is preferably 2,000 or more and 3.5 million or less, more preferably 10,000 or more and 3 million or less, even more preferably more than 30,000 and 3 million or less, and still more preferably 50,000 or more and 3 million or less. <9> ~ <13> 10. The aqueous composition for body use according to claim 1, wherein <15> The content of the component (B1) in the component (B) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and still more preferably 80% by mass or more, and 100% by mass or less. <9> ~ <14> 10. The aqueous composition for body use according to claim 1, wherein <16> The component (B) further contains (B2) an anionic polymer other than the component (B1). <9> ~ <15> 10. The aqueous composition for body use according to claim 1, wherein <17> The molecular weight of the component (B2) is preferably 1,000 or more and 50,000 or less, more preferably 1,000 or more and 30,000 or less, even more preferably 2,000 or more and 30,000 or less, still more preferably 5,000 or more and 30,000 or less, and still more preferably 10,000 or more and 30,000 or less. <16> The aqueous composition for body use described above. <18> The component (B2) is preferably a polymer having a carboxy group and a molecular weight of 1,000 or more and 50,000 or less, more preferably 1,000 or more and 30,000 or less, and more preferably a non-crosslinked polymer containing a structural unit derived from (meth)acrylic acid and a molecular weight of 1,000 or more and 30,000 or less. <16> or <17> The aqueous composition for body use described above. <19> The component (B2) is at least one selected from the group consisting of poly(meth)acrylic acid, (meth)acrylic acid / (meth)acrylic acid alkyl ester copolymers, and salts thereof. <16> ~ <18> 10. The aqueous composition for body use according to claim 1, wherein

[0087] <20> The anionic charge density of the component (B2) is preferably 1.0 mmol / g or more and 25 mmol / g or less, more preferably 3.0 mmol / g or more and 20 mmol / g or less, and even more preferably 5.0 mmol / g or more and 15 mmol / g or less. <16> ~ <19> 10. The aqueous composition for body use according to claim 1, wherein <21> The content of the component (B2) in the component (B) is preferably 1% by mass or more and 50% by mass or less, more preferably 2% by mass or more and 40% by mass or less, even more preferably 3% by mass or more and 30% by mass or less, and still more preferably 5% by mass or more and 20% by mass or less. <16> ~ <20> 10. The aqueous composition for body use according to claim 1, wherein <22> the mass ratio of the component (B2) to the total amount of the component (B1) and the component (B2) [(B2) / {(B1)+(B2)}] is preferably 0.01 or more and 1.0 or less, more preferably 0.02 or more and 0.80 or less, even more preferably 0.05 or more and 0.50 or less, and still more preferably 0.08 or more and 0.30 or less; <16> ~ <21> 10. The aqueous composition for body use according to claim 1, wherein <23> the component (C) is at least one selected from the group consisting of polyalkylene glycol or a derivative thereof, a polymer containing a structural unit derived from vinylpyrrolidone, a polymer containing a structural unit derived from a (meth)acrylic acid ester, polyvinyl alcohol, polyacrylamide, and polycaprolactam, preferably at least one selected from the group consisting of polyalkylene glycol or a derivative thereof, and a polymer containing a structural unit derived from vinylpyrrolidone, more preferably at least one selected from the group consisting of polyethylene glycol, polypropylene glycol, polyethylene glycol-polypropylene glycol copolymer, mono- or di-fatty acid esters thereof, and polyvinylpyrrolidone, and even more preferably at least one selected from the group consisting of polyethylene glycol, polyethylene glycol-polypropylene glycol copolymer, mono- or di-fatty acid esters thereof, and polyvinylpyrrolidone; <1> ~ <22> 10. The aqueous composition for body use according to claim 1, wherein <24> The weight average molecular weight of the component (C) is preferably 2,000 or more and 2,000,000 or less, more preferably 5,000 or more and 1,500,000 or less, and even more preferably 10,000 or more and 1,500,000 or less. <1> ~ <23> 10. The aqueous composition for body use according to claim 1, wherein <25> The content of the component (A) in the aqueous composition for personal use is preferably 0.01% by mass or more and 3.0% by mass or less, more preferably 0.02% by mass or more and 2.5% by mass or less, even more preferably 0.05% by mass or more and 2.0% by mass or less, still more preferably 0.1% by mass or more and 1.5% by mass or less, still more preferably 0.2% by mass or more and 1.5% by mass or less, and still more preferably 0.2% by mass or more and 1.0% by mass or less. <1> ~ <24> 10. The aqueous composition for body use according to claim 1, wherein <26> The content of the component (B) in the aqueous composition for personal use is preferably 0.005% by mass or more and 3.0% by mass or less, more preferably 0.01% by mass or more and 2.0% by mass or less, even more preferably 0.02% by mass or more and 1.5% by mass or less, still more preferably 0.02% by mass or more and 1.0% by mass or less, still more preferably 0.02% by mass or more and 0.5% by mass or less, still more preferably 0.02% by mass or more and 0.3% by mass or less, still more preferably 0.02% by mass or more and 0.3% by mass or less, still more preferably 0.02% by mass or more and 0.2% by mass or less, still more preferably 0.02% by mass or more and 0.1% by mass or less, and still more preferably 0.04% by mass or more and 0.1% by mass or less, <1> ~ <25> 10. The aqueous composition for body use according to claim 1, wherein <27> The total content of the component (A) and the component (B) in the aqueous composition for personal use is preferably 0.02% by mass or more and 5.0% by mass or less, more preferably 0.04% by mass or more and 4.0% by mass or less, even more preferably 0.05% by mass or more and 3.0% by mass or less, still more preferably 0.1% by mass or more and 2.0% by mass or less, still more preferably 0.2% by mass or more and 2.0% by mass or less, and still more preferably 0.3% by mass or more and 2.0% by mass or less. <1> ~ <26> 10. The aqueous composition for body use according to claim 1, wherein <28> The mass ratio of the component (A) to the component (B) in the aqueous composition for personal use [(A) / (B)] is preferably 1.0 or more and 30 or less, more preferably 2.0 or more and 20 or less, even more preferably 3.0 or more and 15 or less, still more preferably 4.0 or more and 12 or less, and still more preferably 5.0 or more and 10 or less. <1> ~ <27> 10. The aqueous composition for body use according to claim 1, wherein <29> the ratio of the number of moles of cationic charge of the component (A) to the number of moles of anionic charge of the component (B) in the aqueous composition for personal use is preferably 10 / 90 to 95 / 5, more preferably 20 / 80 to 95 / 5, and even more preferably 25 / 75 to 90 / 10; <1> ~ <28> 10. The aqueous composition for body use according to claim 1, wherein

[0088] <30> The content of component (C) in the aqueous composition for personal use is preferably 0.02% by mass or more and 5.0% by mass or less, more preferably 0.04% by mass or more and 4.0% by mass or less, even more preferably 0.05% by mass or more and 3.0% by mass or less, still more preferably 0.1% by mass or more and 2.0% by mass or less, still more preferably 0.2% by mass or more and 2.0% by mass or less, and still more preferably 0.3% by mass or more and 2.0% by mass or less. <1> ~ <29> 10. The aqueous composition for body use according to claim 1, wherein <31> The mass ratio of the component (C) to the total amount of the component (A) and the component (B) in the aqueous composition for personal use [(C) / {(A)+(B)}] is preferably 0.2 or more and 20 or less, more preferably 0.3 or more and 15 or less, even more preferably 0.4 or more and 10 or less, still more preferably 0.5 or more and 8.0 or less, still more preferably 0.6 or more and 5.0 or less, still more preferably 0.8 or more and 2.0 or less, and still more preferably 0.8 or more and 1.5 or less. <1> ~ <30> 10. The aqueous composition for body use according to claim 1, wherein <32> The water content in the aqueous composition for personal use is preferably 50% by mass or more, more preferably 70% by mass or more, even more preferably 80% by mass or more, and still more preferably 90% by mass or more. <1> ~ <31> 10. The aqueous composition for body use according to claim 1, wherein <33> The pH of an aqueous solution obtained by diluting the aqueous composition for personal use 20 times with water at 25°C is preferably 3.0 or more, more preferably 3.2 or more, and preferably 7.5 or less, more preferably 7.0 or less, even more preferably 6.0 or less, and still more preferably 5.0 or less. <1> ~ <32> 10. The aqueous composition for body use according to claim 1, wherein <34> The method comprises a step of dissolving or dispersing the component (B) and the component (C) in water to prepare a mixed solution containing the component (B) and the component (C), and then mixing the mixed solution with the component (A) or an aqueous solution thereof. <1> ~ <33> 1. A method for producing the aqueous composition for body use according to any one of the preceding claims. <35> <1> ~ <34> A cosmetic composition comprising the aqueous body composition according to any one of the above. <36> The content of the aqueous composition for body use in the cosmetic composition is 1% by mass or more and 80% by mass or less, preferably 10% by mass or more and 60% by mass or less. <35> The cosmetic composition according to claim 1. <37> The content of the component (A) in the cosmetic composition is preferably 0.001% by mass or more and 3.0% by mass or less, more preferably 0.005% by mass or more and 2.0% by mass or less, even more preferably 0.01% by mass or more and 1.5% by mass or less, still more preferably 0.05% by mass or more and 1.5% by mass or less, and still more preferably 0.05% by mass or more and 1.0% by mass or less, <35> or <36> The cosmetic composition according to claim 1. <38> The content of the component (B) in the cosmetic composition is preferably 0.0005% by mass or more and 3.0% by mass or less, more preferably 0.001% by mass or more and 2.0% by mass or less, even more preferably 0.01% by mass or more and 1.5% by mass or less, still more preferably 0.02% by mass or more and 1.0% by mass or less, still more preferably 0.02% by mass or more and 0.5% by mass or less, still more preferably 0.02% by mass or more and 0.3% by mass or less, still more preferably 0.02% by mass or more and 0.2% by mass or less, and still more preferably 0.02% by mass or more and 0.1% by mass or less, <35> ~ <37> The cosmetic composition according to any one of the above. <39> the total content of the component (A) and the component (B) in the cosmetic composition is preferably 0.0015% by mass or more and 5.0% by mass or less, more preferably 0.01% by mass or more and 4.0% by mass or less, even more preferably 0.02% by mass or more and 4.0% by mass or less, still more preferably 0.05% by mass or more and 2.0% by mass or less, and even more preferably 0.05% by mass or more and 1.5% by mass or less, <35> ~ <38> The cosmetic composition according to any one of the above.

[0089] <40> the content of the component (C) in the cosmetic composition is preferably 0.0015% by mass or more and 5.0% by mass or less, more preferably 0.01% by mass or more and 4.0% by mass or less, even more preferably 0.02% by mass or more and 4.0% by mass or less, still more preferably 0.05% by mass or more and 2.0% by mass or less, and even more preferably 0.05% by mass or more and 1.5% by mass or less, <35> ~ <39> The cosmetic composition according to any one of the above. <41> <35> ~ <40> A hair treatment method comprising the steps of applying the cosmetic composition according to any one of the above to hair, and then heating the hair to a temperature of 80°C or higher. <42> the amount of the cosmetic composition applied to the hair is such that the bath ratio (mass of the cosmetic composition / dry mass of the hair to which the composition is applied) is preferably 0.005 or more, more preferably 0.01 or more, even more preferably 0.05 or more, and is preferably 20 or less, more preferably 15 or less, even more preferably 12 or less; <41> The hair treatment method according to claim 1. <43> After applying the cosmetic composition to the hair, a step of rinsing the cosmetic composition with water is carried out before heating the hair. <41> or <42> The hair treatment method according to claim 1. <44> The heating temperature of the hair is preferably 100°C or higher, more preferably 120°C or higher, even more preferably 140°C or higher, and is preferably 220°C or lower, more preferably 200°C or lower. <41> ~ <43> The hair treatment method according to any one of the above. [Example]

[0090] The present invention will be described below with reference to examples, but the present invention is not limited to the scope of the examples. Measurements and evaluations in the examples were carried out by the following methods.

[0091] (Measurement of viscosity of 1% by mass aqueous solution of cationic polymer) An aqueous solution containing 1% by mass of the active ingredient of the cationic polymer (component (A) or component (A')) used in each example was prepared, and the viscosity of the aqueous solution was measured at 30°C using a B-type viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd.). In these examples, cationic polymers other than component (A) are referred to as "component (A')."

[0092] (pH measurement) The aqueous composition of each example was diluted 20 times with water, and the pH at 25°C was measured using a pH meter (F-51, manufactured by Horiba Ltd.).

[0093] (Preparing for damage tracing) 7 mL of "Kao Foam Hair Bleach L" (first agent) and 15 mL of "Kao Foam Hair Color d" (second agent) manufactured by Kao Corporation were mixed and applied to a 20 cm long, 20 g mass of Japanese hair tress. After leaving it to stand for 20 minutes, it was thoroughly rinsed with warm water at 35-40°C (bleaching treatment). It was then washed twice with plain shampoo of the following composition. The bleaching treatment was repeated four times to prepare damaged tresses for evaluation.

[0094] (Measurement of combing force immediately after treatment with aqueous composition) (1) 20 g of damaged traces were soaked in 10 g ± 0.5 g of water, and 4 mL of each aqueous composition was applied. The traces were then massaged in with the hands and left for 30 seconds, after which the traces were rinsed with warm water at 35 to 40°C for 15 seconds. (2) The water content of the tresses after rinsing was adjusted to 10 g, and the tresses were completely untangled by combing with a brush. Then, the tresses were placed in a combing force measuring device (Utsunomiya Seiki Co., Ltd., "KOT-0303"), and a commercial hairbrush SL-801 (Sunbee Industrial Co., Ltd.) was inserted through the top of the tresses. The tresses were manually combed at a constant speed (60 rpm) to measure the load (g) applied when the comb was passed through to the ends. Combing was performed 50 times, and the average value of the combing loads at all 50 points was recorded as the "combing force immediately after treatment." A smaller combing force indicates less tangled hair and a better result. The combing load for damaged tresses (containing 10 g ± 0.5 g of water) that had not been treated with the aqueous composition was 1,568 g.

[0095] [Plain shampoo composition] (quality%) Polyoxyethylene (2.0) Lauryl Ether Sulfate Sodium (*1): 15.5 Lauric acid diethanolamide (*2): 2.2 Disodium edetate: 0.15 Sodium benzoate: 0.18 Oxybenzone: 0.03 Phosphoric acid: 0.07 Sodium chloride: 0.8 Fragrance: 0.4 Purified water: Residual Total: 100.00 (*1) 42.0% by mass of Emar E-27C (manufactured by Kao Corporation, active ingredient 27% by mass) (*2) Aminone C-11S (Kao Corporation)

[0096] (Measurement of combing force after treatment with aqueous composition and two washes) After carrying out (1) and (2) in the "measurement of combing force immediately after treatment" above, the following (3) was carried out twice. (3) After towel drying and drying with a hair dryer, the tresses were again wet with water and scrubbed 20 times on both sides with 1 mL of the plain shampoo for 30 seconds, and then rinsed for 15 seconds. Then, the operation (2) was carried out and the combing force was measured. If the combing force was 850 g or less, it was determined that the durability was good.

[0097] (Measurement of combing force after treatment with aqueous composition + 4 washes) In the "measurement of combing force immediately after treatment" above, steps (1) and (2) were performed, then step (3) was performed four times, and then step (2) was performed again to measure the combing force. A smaller combing force value indicated better durability, and a combing force of 950 g or less was determined to indicate better durability.

[0098] (Measurement of combing force after treatment with aqueous composition + heat treatment + 4 washes) After carrying out steps (1) and (2) in the "Measurement of combing force immediately after treatment," the tresses were towel-dried and then dried with a hair dryer. Next, while applying tension with a comb, the hair was straightened 10 times with a flat iron (GOLDWELL's "VOSS GF(L41)") set at 180°C (heat treatment). After the heat treatment, step (3) was carried out four times, followed by step (2), and the combing force was measured.

[0099] Examples 1 to 21 and Comparative Examples 1 to 14 (Preparation and Evaluation of Aqueous Compositions) Using the ingredients listed in the table, aqueous compositions were prepared according to the following procedure. A 2% by mass aqueous solution of a cationic polymer (component (A) or component (A')), a 2% by mass aqueous solution of an anionic polymer (B1), a 1% by mass aqueous solution of an anionic polymer (B2), and a 5% by mass aqueous solution of a nonionic polymer (C) were prepared. These aqueous solutions were mixed with the other components listed in the table and the remaining amount of water so that the respective components were blended in the amounts listed in the table. Specifically, water, the aqueous solution of the anionic polymer (B1), the aqueous solution of the nonionic polymer (C), the aqueous solution of the anionic polymer (B2), and an acid (a salt in Comparative Examples 12 to 14) were added in this order, and the mixture was stirred with a pencil mixer. While continuing to stir, the aqueous solution of the cationic polymer (component (A) or component (A')) was gradually added to obtain an aqueous composition. The aqueous compositions thus obtained were evaluated by the methods described above, and the results are shown in Tables 1 to 6.

[0100] [Table 1]

[0101] [Table 2]

[0102] [Table 3]

[0103] [Table 4]

[0104] [Table 5]

[0105] [Table 6]

[0106] The components listed in the table are as follows: The blending amounts (mass %) listed in the table are the effective amounts of each component. <Component (A): Cationic Polymer> *1 Polyquaternium-52 (N,N-dimethylaminoethyl methacrylate diethyl sulfate, N,N-dimethylacrylamide, polyethylene glycol dimethacrylate copolymer), Kao Corporation's "SOFCARE KG-101W-E" (active ingredient content: 2.4% by mass) *2 Polyquaternium-52 (N,N-dimethylaminoethyl methacrylate diethyl sulfate, N,N-dimethylacrylamide, polyethylene glycol dimethacrylate copolymer), Kao Corporation's "SOFCARE KG-301W" (active ingredient content: 4.02% by mass) *3 Polyquaternium-37 (methacryloylethyltrimethylammonium chloride polymer), "Cosmedia Ultragel 300" manufactured by BASF Japan Ltd., content of the structural unit represented by general formula (1): 100 mol% (active ingredient amount 96.9 mass%)

[0107] <Component (A'): Cationic polymer other than component (A)> *4 Polyquaternium-37 (methacryloylethyltrimethylammonium chloride polymer), Kao Corporation's "KP Polymer E" (active ingredient content 35% by mass) *5 Polyquaternium-6 (dimethyldiallylammonium chloride polymer), "Marcote 100" manufactured by Lubrizol Advanced Materials, Inc. (active ingredient content: 41.6% by mass) *6 Polyquaternium-22 (dimethyldiallylammonium chloride-acrylic acid copolymer liquid), "Marcote 295" manufactured by Lubrizol Advanced Materials, Inc. (active ingredient content: 37% by mass) *7 Polyquaternium-11 (vinylpyrrolidone-N,N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate), "Gaffcut 440" manufactured by Ashland Japan Co., Ltd. (active ingredient amount 30% by mass) *8 Polyquaternium-11 (vinylpyrrolidone-N,N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate), "Gaffcut 734" manufactured by Ashland Japan Co., Ltd. (active ingredient amount 50% by mass) *9 Polyquaternium-11 (vinylpyrrolidone-N,N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate), "Gaffcut 755N" manufactured by Ashland Japan Co., Ltd. (active ingredient amount 20% by mass)

[0108] <Component (B1): Anionic polymer> *10 Sodium alginate, Kimika Algin I-3-150 manufactured by Kimika Co., Ltd., Mw: 1.9 million to 2.3 million *11 Sodium alginate, Kimika Algin IL-2 manufactured by Kimika Co., Ltd., Mw: 500,000 to 900,000 *12 Carboxymethylcellulose, "Cellogen F-5" manufactured by Daiichi Kogyo Seiyaku Co., Ltd. *13 Carboxyvinyl polymer, "Carbopol 980" manufactured by Lubrizol Advanced Materials, Inc. *14 (Acrylates / C10-30 alkyl acrylate) crosspolymer, "Pemulen TR-1" manufactured by Lubrizol Advanced Materials, Inc.

[0109] <Component (B2): Anionic polymer> *15 (Acrylic acid / stearyl acrylate) copolymer, Kao Corporation's "SOFCARE SA-37W" (active ingredient content 10% by mass) *16 Polyacrylic acid, "Jurimer AC-10L" manufactured by Toagosei Co., Ltd. (active ingredient content: 40% by mass)

[0110] <Component (C): Nonionic polymer> *17 Polyethylene glycol, Aoki Oil & Fat Industries Co., Ltd. "Brownon PEG-20000S", Mw: 20,000 *18 Polyethylene glycol, Fujifilm Wako Pure Chemical Industries, Ltd. "Wako Polyethylene Glycol 6,000", Mw: 6,000 *19 Polyvinylpyrrolidone, BASF Japan Ltd. "Ruviscol K90", Mw: 1.2 million *20 Polyoxyethylene polyoxypropylene glycol (150E.O.) (35P.O.), NOF Corporation "Pronon #208" *21 Polyoxyethylene polyoxypropylene glycol (240E.O.) (60P.O.), NOF Corporation "Unilube 75DE-2620R" *22 Polyethylene glycol distearate, Sanyo Chemical Industries, Ltd. "Emulmin 862"

[0111] <Acid> *23 90% lactic acid, PURAC Thailand Ltd. "PURAC ULTRAPURE90" (active ingredient amount 90% by mass)

[0112] As shown in the table, hair treated with the aqueous composition of this example was less likely to tangle, and the treatment effect continued even after washing. Furthermore, the results of Examples 3, 6, and 7 show that when hair treated with the aqueous composition of this example was heated to a temperature of 80°C or higher, the combing force after four washes was lower than when no heat treatment was performed, indicating an improved anti-tangle effect. [Industrial Applicability]

[0113] According to the present invention, an aqueous composition for body use can be provided which can improve the texture improving effect of the object to be treated and the durability of said effect, and in particular, when used in hair treatment, can improve the effect of inhibiting hair tangles and the durability of said effect. The aqueous composition can be used as various cosmetic compositions such as skin cosmetic compositions and hair cosmetic compositions. The aqueous composition can also be used as a premix for various cosmetic compositions. For example, a skin cosmetic composition or a hair cosmetic composition can be prepared by blending additional components into the aqueous composition.

Claims

1. (A) a cationic polymer having a viscosity of 1,000 mPa·s or more in a 1% by mass aqueous solution at 30°C; (B) an anionic polymer, (C) a nonionic polymer having a weight average molecular weight of 5,000 or more and 1,500,000 or less, and water containing Aqueous composition for the body.

2. 2. The aqueous body composition according to claim 1, wherein the component (A) is a polymer containing a structural unit represented by the following general formula (1): 【Chemistry 1】 In formula (1), R 1 is a hydrogen atom or a methyl group, and R 2 ~R 4 are each independently an alkyl group having 1 to 4 carbon atoms, X is —O— or —NH—, and m is a number of 1 to 4.

3. 2. The aqueous composition for personal use according to claim 1, wherein the mass ratio [(A) / (B)] of component (A) to component (B) contained in the aqueous composition for personal use is 1.0 or more and 30 or less.

4. 2. The aqueous composition for personal use according to claim 1, wherein the mass ratio [(C) / {(A)+(B)}] of component (C) to the total amount of component (A) and component (B) contained in the aqueous composition for personal use is 0.2 or more and 20 or less.

5. 2. The aqueous body care composition according to claim 1, wherein the component (C) is at least one member selected from the group consisting of polyalkylene glycols or derivatives thereof, and polymers containing structural units derived from vinylpyrrolidone.

6. 2. The aqueous body composition according to claim 1, wherein the component (B) comprises (B1) one or more members selected from the group consisting of a crosslinked polymer containing a structural unit derived from (meth)acrylic acid and an anionic polysaccharide.

7. 7. The aqueous body composition according to claim 6, wherein the component (B1) is alginic acid or a salt thereof.

8. 2. The aqueous composition for personal care according to claim 1, wherein the aqueous composition for personal care, when diluted 20 times with water, has a pH of 5.0 or less at 25°C.

9. 2. The aqueous body care composition according to claim 1, wherein the component (A) is at least one selected from the group consisting of methacryloylethyltrimethylammonium salt polymers and quaternized dialkylaminoalkyl (meth)acrylate polymers.

10. A cosmetic composition comprising the aqueous composition for personal use according to any one of claims 1 to 9.

11. A hair treatment method comprising the steps of applying the cosmetic composition according to claim 10 to hair and then heating the hair to a temperature of 80°C or higher.

12. A method for producing an aqueous composition for personal care, comprising: (A) a cationic polymer having a viscosity of 1,000 mPa·s or more in a 1% by mass aqueous solution at 30°C of 1,000 mPa·s or more; (B) an anionic polymer; (C) a nonionic polymer having a weight-average molecular weight of 5,000 or more and 1,500,000 or less; and water, The component (B) and the component (C) are dissolved or dispersed in water to prepare a mixed liquid; Next, the method for producing an aqueous body composition includes a step of mixing the mixture with the component (A) or an aqueous solution thereof.

Images