Hair treatment method

Abstract

The present invention relates to a hair treatment method comprising the following steps 1 and 2 in any order, without rinsing the hair with water between steps 1 and 2. Step 1: Applying composition I containing the following components (A) and (B) to hair: Component (A): A cationic polymer having a viscosity of 1 mass% aqueous solution at 30°C of 1,000 mPa-s or more Component (B): Anionic polymer Step 2: Applying Composition II containing the following components (C) and (D): Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane

Description

[Technical Field]

[0001] The present invention relates to a hair treatment method and a hair treatment kit. [Background technology]

[0002] Various methods have been proposed for improving the texture of hair. For example, WO 2010 / 141683 (Patent Document 1) discloses a hair treatment method using a complex product system that provides improved conditioning effects to hair, the method comprising the steps of: applying to hair a predetermined amount of a hair wash composition containing a carrier, a specific surfactant, and a predetermined amount of a silicone emulsion; and applying to hair a predetermined amount of a hair conditioning composition containing a cationic surfactant, a high-melting-point aliphatic compound, and an aqueous carrier and having predetermined physical properties.

[0003] WO 2017 / 151995 (Patent Document 2) discloses a method for treating hair that provides improved conditioning benefits such as improved manageability and / or reduced frizz / friction, the method comprising: a) applying to the hair a shampoo composition comprising a detersive surfactant, wherein the shampoo composition is substantially free of silicone conditioning agents; b) rinsing the shampoo composition from the hair; and c) applying to the hair a conditioning composition comprising a silicone resin and an aminosilicone, wherein the aminosilicone has non-quaternized and / or quaternary amine functional groups.

[0004] WO 2016 / 151139 (Patent Document 3) discloses a cosmetic treatment method for hair for care and / or cleansing, comprising step (i) of applying to the hair a first cosmetic composition comprising a cationic surfactant, a silicone and a non-silicone fatty substance, and then step (ii) of applying to the hair a second cosmetic composition comprising a cationic surfactant, a predetermined cationic polymer, and an organosilane, wherein the method does not include an intermediate rinsing step between the application steps (i) and (ii).

[0005] International Publication No. 2020 / 146931 (Patent Document 4) discloses a hair care system including a specific shampoo composition and a conditioner composition. Summary of the Invention

[0006] The present invention relates to a hair treatment method comprising the following steps 1 and 2 in any order, without rinsing the hair with water between steps 1 and 2. Step 1: Applying composition I containing the following components (A) and (B) to hair: Component (A): A cationic polymer having a viscosity of 1% by mass aqueous solution at 30°C of 1,000 mPa-s or more Component (B): Anionic polymer Step 2: Applying composition II containing the following components (C) and (D) to hair: Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane Detailed Description of the Invention

[0007] Hair problems include hair shape problems such as curl, frizz, wavy hair, flyaway hair, and flyaway hair, as well as hair texture problems such as dryness, and there is a demand for a hair treatment method that can alleviate these problems. In conventional hair treatment methods, smoothness and moisturizing feel are in a trade-off relationship with lightness and naturalness in the treated hair, making it difficult to obtain hair that excels in all aspects. Furthermore, it is particularly difficult to achieve excellent texture regardless of the hair diameter and degree of damage. For example, when a formula designed for thick hair is applied to thin hair, excessive silicone components are deposited on the hair, making the hair feel heavy. Furthermore, the surface of hair is covered with a cuticle and is hydrophobic, but it is known that excessive washing or brushing, or chemical treatments such as perming or bleaching, can cause the cuticle to deteriorate or peel, making the hair hydrophilic. Therefore, a formula designed for highly damaged hair can excessively deposit hydrophobic feel-improving agents such as silicone on less damaged hair, making the hair feel heavy.

[0008] The technology described in Patent Document 1 is a formulation that does not substantially contain anionic polymers, and is insufficient in terms of durability to washing and moist feeling. The technology described in Patent Document 2 is a formula that does not contain a cationic polymer and an anionic polymer in the same composition, and is a typical shampoo and treatment composition that uses an MQ resin instead of a silicone compound, and is insufficient in terms of durability to washing and a light finish. The technology described in Patent Document 3, like the technology described in Patent Document 2, is a formulation that does not contain a cationic polymer and an anionic polymer in the same composition.

[0009] The present invention relates to a hair treatment method that can improve the shape and texture of hair and maintain the effect, regardless of the diameter and degree of damage of the hair, and in particular, to a hair treatment method that can simultaneously achieve smoothness and moisturized feeling, as well as lightness and naturalness, which have been difficult to achieve simultaneously in the past.

[0010] The present inventors have discovered that a hair treatment method can be provided that includes, in any order, two steps, namely, step 1 of applying a predetermined composition I to the hair and step 2 of applying a predetermined composition II to the hair, without rinsing the hair with water between steps 1 and 2, and that can achieve an effect of improving the shape and texture of hair and maintain this effect, regardless of the diameter of the hair or the degree of damage, and can simultaneously achieve smoothness and a moist feeling, as well as lightness and naturalness.

[0011] The present invention includes the following hair treatment method. [1] A hair treatment method comprising the following steps 1 and 2 in any order, without rinsing the hair with water between steps 1 and 2. Step 1: Applying composition I containing the following components (A) and (B) to hair: Component (A): A cationic polymer having a viscosity of 1% by mass aqueous solution at 30°C of 1,000 mPa-s or more Component (B): Anionic polymer Step 2: Applying composition II containing the following components (C) and (D) to hair: Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane

[0012] The present invention provides a hair treatment method that can achieve an effect of improving the shape and texture of hair and maintain the effect, regardless of the diameter of the hair or the degree of damage, and can simultaneously achieve smoothness and moisturized feeling, as well as lightness and naturalness.

[0013] <Hair treatment method> The hair treatment method of the present invention includes the following steps 1 and 2 in any order, without rinsing the hair with water between steps 1 and 2. Step 1: Applying composition I containing the following components (A) and (B) to hair: Component (A): A cationic polymer having a viscosity of 1% by mass aqueous solution at 30°C of 1,000 mPa-s or more Component (B): Anionic polymer Step 2: Applying Composition II containing the following components (C) and (D): Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane In this specification, "containing component X" also includes blending component X.

[0014] It has been discovered that the hair treatment method of the present invention, which includes the above-mentioned steps 1 and 2, can achieve an effect of improving the shape and texture of hair and maintain this effect for a long time, regardless of the diameter of the hair or the degree of damage, and can simultaneously achieve smoothness and moisturized feeling, as well as lightness and naturalness. The reason why the hair treatment method of the present invention exhibits the above-mentioned effects is not clear, but is thought to be as follows.

[0015] Composition I, which contains a specific cationic polymer, component (A), and an anionic polymer, component (B), forms a poorly water-soluble film on hair, which is a so-called polyion complex in which a crosslinked structure is formed due to ionic interactions between components (A) and (B). The film formed by composition I is presumed to shape the hair. Furthermore, composition II, which contains component (C), a specific modified silicone, and component (D), a dimethylpolysiloxane, is believed to form a long-lasting hydrophobic film and improve the feel of hair. Furthermore, the film formed by Composition II after hair treatment with Composition I is believed to improve smoothness and moisturizing without overloading. This synergistic effect is due to the ability of the polyion complex formed by Composition I to undergo polar interactions with the modified silicone and hydrophobic interactions with the dimethylpolysiloxane from Composition II. This allows the uptake to be adjusted independently of the hair diameter and degree of damage. In particular, not rinsing the hair with water between Steps 1 and 2 prevents excessive swelling of the polyion complex formed by Composition I. The absence of excessive swelling prevents the formation of polar interactions between the polyion complex formed by Composition I and the modified silicone in the film formed by Composition II. This is believed to be why the effects of the present invention are exerted on hair.

[0016] The hair treatment method of the present invention includes the above steps 1 and 2 in any order, and does not include a step of rinsing the hair with water between steps 1 and 2. Steps other than rinsing the hair with water may or may not be included between Step 1 and Step 2. From the viewpoint of the effects of the present invention, Steps 1 and 2 are preferably performed consecutively. "Performed consecutively" means that one step is performed immediately after the other step, without performing the step of rinsing the hair with water or any other steps. Preferably, Composition I and Composition II are applied to the hair without any other steps therebetween.

[0017] In one preferred embodiment of the present invention, from the viewpoint of improving the ease of shaping the object to be treated and the durability of that effect, particularly improving the effect of suppressing hair frizz and the durability of that effect, regardless of the diameter of the hair or the degree of damage, steps 1 and 2 are carried out in this order. In this case, composition I is applied directly to the hair in step 1, and there is no step of rinsing the hair with water between steps 1 and 2. In step 2, composition II is applied to the hair to which composition I has been applied. In this embodiment, the polyion complex formed by composition I is first adsorbed onto the hair, and then the modified silicone in composition II forms a polar interaction, and the dimethylpolysiloxane forms a hydrophobic interaction, with the polyion complex formed by composition I. The amount of each component taken up is adjusted independently of the diameter and degree of damage of the hair, and it is thought that while improving smoothness and moisturizing, a light and natural feel is also achieved because overloading does not occur.

[0018] Furthermore, before step 1 and step 2, any one or more steps selected from the following step A and step B can be carried out. Step A: applying shampoo to the hair and optionally rinsing the shampooed hair; Step A: Applying conditioner to hair and optionally rinsing the conditioned hair

[0019] After Steps 1 and 2, it is preferable to carry out a post-step of rinsing off Composition I and Composition II applied to the hair with water. In this case, to allow Composition I and Composition II to fully penetrate the hair, a standing time may be provided after Steps 1 and 2 before rinsing off with water. The standing 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 off Composition I and Composition II 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. Thereafter, the hair may be optionally dried by towel drying, drying with a hairdryer, or the like; or heated with an iron, or the like. Optionally, hair styling products can also be applied to arrange the hair into various hairstyles.

[0020] {Step 1} Step 1 is a step of applying composition I containing the above-mentioned component (A) and component (B) to hair. Specific product forms of Composition I 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. The form of composition I is preferably a liquid or gel composition, and from the viewpoint of improving the stability of the composition and improving the feeling when used, it is more preferably a liquid composition. In the present invention, "liquid or gel" means a material that is determined to be liquid in a liquid-solid determination test according to the American Society for Testing and Materials standard "ASTM D 4359-90: Standard Test Method for Determining Whether a Material is a Liquid or Solid." Each component contained in Composition I will be described below.

[0021] (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.

[0022] 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 ease of polyion complex formation, ease of shaping the object to be treated and improvement of its durability, particularly improvement of hair frizz suppression effect and its durability, and improvement of composition stability. 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 to 100,000 mPa-s, more preferably 1,300 to 80,000 mPa-s, even more preferably 1,500 to 50,000 mPa-s, still more preferably 1,700 to 30,000 mPa-s, and even more preferably 1,800 to 25,000 mPa-s. The viscosity of a 1% by mass aqueous solution of component (A) at 30°C can be measured specifically by the method described in the Examples. The unit of viscosity is "Pa-s", which is an abbreviation for "millipascal-second".

[0023] From the viewpoint of improving film-forming ability, the weight-average molecular weight (Mw) of component (A) is preferably 5,000 or more, more preferably 10,000 or more, even more preferably 30,000 or more, still more preferably 50,000 or more, and even more preferably 100,000 or more. There is no particular upper limit to the molecular weight, and from the viewpoint of ease of forming a polyion complex and handleability, it is preferably 3,000,000 or less, more preferably 2,000,000 or less, and more preferably 1,500,000 or less. The weight average molecular weight (Mw) of component (A) is preferably 5,000 or more and 3,000,000 or less, more preferably 10,000 or more and 2,000,000 or less, even more preferably 30,000 or more and 2,000,000 or less, still more preferably 50,000 or more and 1,500,000 or less, and even more preferably 100,000 or more and 1,500,000 or less. The weight average molecular weight of component (A) can be measured by gel permeation chromatography (GPC).

[0024] 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) and improving the stability of the composition. Furthermore, from the viewpoints of interaction with the film formed by composition II and improving the stability of the composition, it 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, even more preferably 0.2 mmol / g or more and 12 mmol / g or less, still more preferably 0.3 mmol / g or more and 10 mmol / g or less, still more preferably 0.3 mmol / g or more and 7.0 mmol / g or less, and still more preferably 0.5 mmol / g or more and 5.0 mmol / g or less.

[0025] 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 of the cationic charge densities and blending amounts of the individual polymers.

[0026] 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.

[0027] 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).

[0028] 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).

[0029] From the viewpoint of improving film-forming ability and facilitating the formation of a polyion complex through interaction with component (B), component (A) is preferably a polymer containing a structural unit represented by the following general formula (1):

[0030] [ka]

[0031] [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.

[0032] 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.

[0033] 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 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.

[0034] 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.

[0035] 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 higher in viscosity of a 1% by mass aqueous solution at 30°C, ease of forming a polyion complex, ease of shaping the object to be treated and improvement of its durability, and particularly improvement of the effect of suppressing hair frizz and its durability, 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-37), Polyquaternium-49), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-hydroxyethyl methacrylate copolymer (Polyquaternium-48), and N,N-dimethylaminoethyl diethyl methacrylate sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (Polyquaternium-52), 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).

[0036] Commercially available polymers can also be used as component (A), including, for example, "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.

[0037] (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.

[0038] 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.

[0039] From the viewpoints of ease of forming a polyion complex, ease of shaping the object to be treated and improvement of the durability of this effect, particularly improvement of the effect of suppressing hair frizz and the durability of this effect, and improvement of the stability of the composition, it is preferable that component (B) contains one or more anionic polymers selected from the group consisting of crosslinked polymers containing structural units derived from (meth)acrylic acid and anionic polysaccharides.

[0040] Among the components (B), 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 later. 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.

[0041] 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.

[0042] Among the component (B), 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 viewpoints of ease of forming a polyion complex, ease of shaping the object to be treated, and improvement of its durability, 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.

[0043] When component (B) 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] Among the above, from the viewpoint of ease of forming a polyion complex and improving its durability, component (B) 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.

[0045] The anionic charge density of component (B) is not particularly limited, but is preferably 1.0 mmol / g or more, more preferably 2.0 mmol / g or more, and even more preferably 3.5 mmol / g or more from the viewpoints of facilitating the formation of a polyion complex through interaction with component (A), the effects of the present invention, and improving the stability of the composition, and is preferably 25 mmol / g or less, more preferably 20 mmol / g or less, and even more preferably 15 mmol / g or less from the viewpoints of improving the texture of the treated object and improving its durability, particularly the effect of suppressing hair tangles when used in hair treatment and improving its durability. The anionic charge density of component (B) 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. The anionic charge density of component (B) is the number of moles of anionic groups contained per gram of polymer. If at least a portion of the anionic groups in component (B) 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 (B). In this case, the anionic charge density of component (B) is determined by calculating a weighted average of the anionic charge densities and blending amounts of the individual polymers.

[0046] When component (B) is an anionic polysaccharide, from the viewpoints of facilitating the formation of a polyion complex through interaction with component (A), improving the ease of shaping the object to be treated and its durability, particularly improving the effect of inhibiting hair frizz and its durability, and improving the stability of the composition, the weight-average molecular weight (Mw) is preferably at least 2,000, more preferably at least 5,000, even more preferably more than 10,000, still more preferably at least 30,000, and even more preferably at least 50,000, from the viewpoint of improving film-forming ability. Furthermore, from the viewpoints of facilitating the formation of a polyion complex through interaction with component (A), improving the ease of shaping the object to be treated and its durability, particularly improving the effect of inhibiting hair frizz and its durability, and improving the stability of the composition, the weight-average molecular weight (Mw) is preferably at most 3.5 million, more preferably at most 3 million, and even more preferably at most 2.5 million. The weight-average molecular weight (Mw) of the anionic polysaccharide, component (B), is preferably 2,000 or more and 3,500,000 or less, more preferably 5,000 or more and 3,000,000 or less, even more preferably more than 10,000 or more and 3,000,000 or less, still more preferably 30,000 or more and 2,500,000 or less, and even more preferably 50,000 or more and 2,500,000 or less. The weight average molecular weight of component (B) can be measured by gel permeation chromatography (GPC).

[0047] The content of component (B) 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), ease of shaping the object to be treated and improving the durability of this effect, particularly improving the effect of suppressing hair frizz and improving the durability of this effect, and improving the stability of the composition.

[0048] (Component (G): Nonionic polymer) From the viewpoints of improving film-forming ability, improving the ease of shaping the object to be treated and the durability of that effect, particularly improving the effect of suppressing hair frizz and the durability of that effect, and improving the stability of the composition, it is preferable that composition I further contain (G) a nonionic polymer. It is believed that when component (G) is used, the rigid crosslinked structure of the polyion complex formed by components (A) and (B) is reinforced by the complexation with the long-chain, flexible noncrosslinked structure of component (G). 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.

[0049] Examples of component (G) 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.

[0050] 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, improving humidity resistance, and 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Among the above, from the viewpoints of improving film-forming ability, improving the ease of shaping the object to be treated and the durability of that effect, particularly improving the effect of suppressing hair frizz and the durability of that effect, improving the stability of the composition, and availability, component (G) 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.

[0056] From the viewpoints of improving the stability of the composition and of availability, the weight-average molecular weight (Mw) of component (G) 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. The weight-average molecular weight of component (G) 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 (G) can be measured by gel permeation chromatography (GPC).

[0057] Furthermore, from the viewpoint of maintaining functions such as the ease of shaping the object to be treated and improving the durability of that effect, particularly the effect of suppressing hair frizz and improving the durability of that effect, Composition I is substantially free of ionic surfactants such as anionic surfactants, cationic surfactants, and amphoteric surfactants. As used herein, "substantially free" means that the content of ionic surfactants in the above composition I is preferably 5% by mass or less, more preferably 1% by mass or less, even more preferably 0.5% by mass or less, and even more preferably 0.1% by mass or less.

[0058] (Component (H): acid) From the viewpoint of stably forming a polyion complex, the above composition I preferably further contains an acid (H). Component (H) can be an organic acid or an inorganic acid, and is preferably an organic acid from the viewpoint of use in cosmetic compositions. Examples of such organic acids include carboxylic acid compounds and sulfonic acid compounds other than component (B), and are preferably compounds with a molecular weight of 500 or less, more preferably 200 or less.

[0059] Examples of carboxylic acid compounds include aliphatic monocarboxylic acids having 4 or less carbon atoms, such as acetic acid, propionic acid, and butanoic acid; aromatic monocarboxylic acids, such as benzoic acid; aliphatic dicarboxylic acids, such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, and fumaric acid; aromatic dicarboxylic acids, such as phthalic acid and isophthalic acid; polycarboxylic acids, such as polyglutamic acid; hydroxycarboxylic acids, such as lactic acid, malic acid, glycolic acid, hydroxyacrylic acid, glyceric acid, tartaric acid, and citric acid; and acidic amino acids, such as glutamic acid and aspartic acid. One or more of these compounds may be used. Examples of sulfonic acid compounds include aliphatic sulfonic acids such as methanesulfonic acid and ethanesulfonic acid; and aromatic sulfonic acids such as p-toluenesulfonic acid and naphthalenesulfonic acid; and one or more of these can be used.

[0060] From the viewpoint of stably forming a polyion complex and forming a highly stable cosmetic composition, as well as from the viewpoint of use in a cosmetic composition, the organic acid is preferably one or more selected from the group consisting of aliphatic dicarboxylic acids, hydroxycarboxylic acids, and aromatic sulfonic acids, more preferably one or more selected from the group consisting of succinic acid, lactic acid, malic acid, glycolic acid, p-toluenesulfonic acid, and naphthalenesulfonic acid, even more preferably one or more selected from the group consisting of succinic acid and lactic acid, and still more preferably lactic acid. At least a portion of the organic acid may be in the form of an organic acid salt when blended. From the viewpoints of use in cosmetic compositions and easy availability, the salt of the organic acid is preferably an alkali metal salt or alkaline metal salt of the organic acid, more preferably an alkali metal salt, even more preferably one or more selected from the group consisting of sodium salts and potassium salts, and even more preferably a sodium salt. The proportion of the organic acid salt in the total amount of the organic acid and the organic acid salt is preferably 50% by mass or less, more preferably 20% by mass or less, and even more preferably 5% by mass or less, from the viewpoint of ease of forming a polyion complex and improving the stability of the composition, and may be 0% by mass. The proportion (% by mass) of the organic acid salt referred to here means % by mass converted into organic acid.

[0061] (water) Composition I preferably contains water from the viewpoint of forming an emulsion composition. Deionized water or distilled water is preferred as the water used in Composition I. However, tap water, groundwater, or the like sterilized with hypochlorous acid or the like may also be used within a range that does not impair the stability of the composition.

[0062] (Other ingredients) Composition I may contain, as optional ingredients, organic or inorganic acids, anionic surfactants, nonionic surfactants, amphoteric surfactants, aromatic alcohols such as phenoxyethanol, non-aromatic polyols such as dipropylene glycol, oils other than components (C), (D), and (F), antioxidants, antidandruff agents, vitamins, disinfectants, anti-inflammatory agents, preservatives, chelating agents, moisturizers, pearlizing agents, ceramides, fragrances, plant extracts, UV absorbers, pH adjusters, and the like.

[0063] (pH) From the viewpoint of the stability of the composition, the pH of Composition I, as calculated as the pH at 25°C of an aqueous solution obtained by diluting Composition I 20 times with water, is preferably 1.0 or more, more preferably 3.0 or more, and is preferably 7.5 or less, more preferably 7.0 or less, even more preferably 6.0 or less, and even more preferably 5.0 or less. The pH can be measured using a pH meter.

[0064] (Content) The content or blending amount of each component in the above composition I is preferably as follows, from the viewpoints of ease of forming a polyion complex, ease of shaping the object to be treated and improvement of its durability, particularly improvement of the effect of inhibiting hair frizz and its durability, and improvement of the stability of the composition.

[0065] From the viewpoint of ease of polyion complex formation and the effects of the present invention, the content of component (A) in composition I 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. Furthermore, from the viewpoint of improving the stability of the composition, the content of component (A) 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 0.5% by mass or less. The content of component (A) in composition I is preferably 0.01% by mass or more to 3.0% by mass or less, more preferably 0.02% by mass or more to 2.5% by mass or less, even more preferably 0.05% by mass or more to 2.0% by mass or less, still more preferably 0.1% by mass or more to 1.5% by mass or less, still more preferably 0.2% by mass or more to 1.5% by mass or less, and even more preferably 0.2% by mass or more to 0.5% by mass.

[0066] The content of component (B) in composition I is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, and even more preferably 0.02% by mass or more, from the viewpoints of ease of polyion complex formation, improved film-forming ability, and improved composition stability. Furthermore, from the viewpoint of improved composition stability, 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, still more preferably 0.1% by mass or less, and still more preferably 0.08% by mass or less. The content of component (B) in the above composition I 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 0.2% by mass or less, still more preferably 0.02% by mass or more and 0.1% by mass or less, and still more preferably 0.02% by mass or more and 0.08% by mass or less.

[0067] The total content of component (A) and component (B) in composition I is preferably 0.015% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.03% by mass or more, still more preferably 0.04% by mass or more, still more preferably 0.05% by mass or more, still more preferably 0.07% by mass or more, still more preferably 0.1% by mass or more, still more preferably 0.12% by mass or more, still more preferably 0.2% by mass or more, and still more preferably 0.22% by mass or more, from the viewpoint of improving the ease of shaping the object to be treated and the durability of that effect, in particular, improving the effect of suppressing hair frizz and the durability of that effect. Furthermore, from the viewpoint of improving the stability of the composition, the content is preferably 6.0% by mass or less, more preferably 5.0% by mass or less, even more preferably 4.0% by mass or less, still more preferably 3.8% by mass or less, still more preferably 3.5% by mass or less, still more preferably 3.0% by mass or less, still more preferably 2.5% by mass or less, still more preferably 2.0% by mass or less, still more preferably 0.8% by mass or less, still more preferably 0.7% by mass or less, still more preferably 0.6% by mass or less, and still more preferably 0.58% by mass or less. The total content of component (A) and component (B) in the composition I is preferably 0.15% by mass or more and 6.0% by mass or less, more preferably 0.02% by mass or more and 5.0% by mass or less, even more preferably 0.03% by mass or more and 4.5% by mass or less, still more preferably 0.04% by mass or more and 4.0% by mass or less, still more preferably 0.05% by mass or more and 3.8% by mass or less, still more preferably 0.07% by mass or more and 3.5% by mass or less, and still more preferably 0.07% by mass or more and 0.07% by mass or less. more preferably 0.1 mass% or more and 3.5 mass% or less, even more preferably 0.1 mass% or more and 3.0 mass% or less, even more preferably 0.12 mass% or more and 2.5 mass% or less, even more preferably 0.22 mass% or more and 2.0 mass% or less, even more preferably 0.22 mass% or more and 0.8 mass% or less, even more preferably 0.22 mass% or more and 0.7 mass% or less, even more preferably 0.22 mass% or more and 0.6 mass% or less, and even more preferably 0.22 mass% or more and 0.58 mass% or less.

[0068] Regarding the ratio of the contents of components (A) and (B) contained in the composition I, from the viewpoint of ease of forming a polyion complex and from the viewpoint of the effects of the present invention, the mass ratio of component (A) to component (B) [(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, and even more preferably 5.0 or more, and from the viewpoint of improving the stability of the composition, it is preferably 20 or less, more preferably 15 or less, even more preferably 12 or less, and even more preferably 10 or less. The mass ratio [(A) / (B)] is preferably 1.0 or more and 20 or less, more preferably 2.0 or more and 15 or less, even more preferably 3.0 or more and 12 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 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).

[0069] 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 above composition I 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 viewpoints of ease of forming a polyion complex and interaction with the film formed by composition II.

[0070] When the composition I contains a nonionic polymer (G), the content of component (G) in the composition I 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 still more preferably 0.2% by mass or more, from the viewpoint of improving the ease of shaping the object to be treated and the durability of that effect, particularly the effect of suppressing hair frizz and the durability of that effect, and from the viewpoint of suitably exhibiting improved stability of the composition. Also, from the viewpoint of improving stability of the composition, the content 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, still more preferably 1.0% by mass or less, and still more preferably 0.6% by mass or less. The content of component (G) in the composition I 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 0.1% by mass or more and 1.0% by mass or less, and still more preferably 0.2% by mass or more and 0.6% by mass or less.

[0071] When composition I contains an acid (H), the content of component (H) in composition I is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.03% by mass or more, still more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and still more preferably 0.2% by mass or more, from the viewpoint of facilitating the formation of a polyion complex and improving the stability of the composition. Furthermore, the content of component (H) in composition I is preferably 5.0% by mass or less, more preferably 3.0% by mass or less, even more preferably 2.5% by mass or less, and still more preferably 0.5% by mass or less, from the viewpoint of facilitating the formation of a polyion complex and improving the stability of the composition. The content of component (H) in composition I is preferably 0.01% by mass or more and 5.0% by mass or less, more preferably 0.02% by mass or more and 3.0% by mass or less, even more preferably 0.03% by mass or more and 3.0% by mass or less, still more preferably 0.05% by mass or more and 3.0% by mass or less, even more preferably 0.1% by mass or more and 3.0% by mass or less, still more preferably 0.1% by mass or more and 2.5% by mass or less, still more preferably 0.2% by mass or more and 2.5% by mass or less, and still more preferably 0.2% by mass or more and 0.5% by mass or less. When the organic acid is blended in the form of an organic acid salt, the above content is the amount converted into the organic acid.

[0072] When the composition I contains water, the water content in the composition I is preferably 10% by mass or more, more preferably 20% by mass or more, and even more preferably 30% by mass or more, from the viewpoints of facilitating the formation of a polyion complex and improving the stability of the composition. Furthermore, from the viewpoints of improving the stability of the composition and the flexibility of formulation, the water content is preferably 99% by mass or less, more preferably 95% by mass or less, and even more preferably 90% by mass or less. The water content in the composition I is preferably 10% by mass or more and 99% by mass or less, more preferably 20% by mass or more and 95% by mass or less, and even more preferably 30% by mass or more and 90% by mass or less. The water content in the composition may be the balance of the components (A) and (B) and the optional components (G) and (H).

[0073] (viscosity) From the viewpoints of ease of forming a polyion complex, ease of shaping the object to be treated and its durability, particularly the effect of inhibiting hair frizz and its durability, and of improving the stability of the composition, the viscosity of Composition I at 30°C is 1 mPa-s or more, preferably 5 mPa-s or more, and more preferably 10 mPa-s or more. Furthermore, from the viewpoints of ease of forming a polyion complex and ease of handling, the viscosity of Composition I is preferably 10,000 mPa-s or less, more preferably 5,000 mPa-s or less, and even more preferably 1,500 mPa-s or less. The viscosity of Composition I at 30°C is preferably 1 mPa-s or more and 10,000 mPa-s or less, more preferably 5 mPa-s or more and 5,000 mPa-s or less, and even more preferably 10 mPa-s or more and 1,500 mPa-s or less. The viscosity of Composition I at 30° C. can be measured by the method specifically described in the Examples.

[0074] (Production method of composition I) There are no particular limitations on the method for producing Composition I, and Composition I can be produced by dissolving or dispersing the above-mentioned components in water. Among these, from the viewpoints of facilitating the shaping of the object to be treated and improving the durability of this effect, particularly improving the effect of inhibiting hair frizz and improving the durability of this effect, and from the viewpoint of being able to produce a composition with even higher stability, it is preferable to produce Composition I by a method having the following steps M1 to M3 in order. Step M1: (B) Dissolving or dispersing an anionic polymer in water to prepare a solution 1 containing an anionic polymer Step M2: Mixing the solution 1 with (H) acid or an aqueous solution thereof to prepare a mixture 2 containing (B) anionic polymer, (H) acid, and water. Step M3: Mixing the mixture 2 with a solution in which (A) a cationic polymer is dissolved or dispersed in water to prepare a mixture 3 containing (A) a cationic polymer, (B) an anionic polymer, (H) an acid, and water.

[0075] (Application to hair) When step 1 is performed first and then step 2 is performed, composition I is applied directly to the hair. In this case, the film formed by composition I acts as a base coat and has good adhesion to the hair. When step 1 is performed after step 2, composition I is applied to the hair to which composition II has been applied first. In this case, the film formed by composition I acts as a top coat and is likely to achieve an excellent texture regardless of the diameter or degree of damage of the hair. The method for applying the composition I to the hair may be any method that can bring the composition I into contact with the hair, and examples thereof include a method of applying the composition to dry or wet hair, and a method of immersing dry or wet hair in the composition. The amount of composition I applied to the hair is, in terms of dry mass of hair: mass of composition I, preferably 1:0.01 to 1:5, more preferably 1:0.05 to 1:1, and even more preferably 1:0.1 to 1:0.5, from the viewpoint of improving the ease of shaping the object to be treated and the durability of that effect, particularly the effect of inhibiting hair frizz and the durability of that effect, and from the viewpoint of balancing economic efficiency.

[0076] {Step 2} Step 2 is a step of applying composition II containing the following components (C) and (D) to hair. Composition II is a hair cosmetic composition for direct application to hair. Specific product forms 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 treatment or hair styling agent is preferred. The form of composition II is preferably an emulsion composition, and from the viewpoint of improving the stability of the composition and improving the feel when used, it is more preferably an oil-in-water emulsion composition. Each component contained in Composition II will be described below.

[0077] (Component (C): Modified silicone) Component (C) is one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones. The inclusion of component (C) in composition II is believed to enhance the texture and prolong the effect of the interaction with the base coat, particularly the texture of hair. Furthermore, hydrogen bonding between components (B) and (C) is possible, leading to the formation of a highly strengthened network.

[0078] Polyglycerin-modified silicone The polyglycerin-modified silicone is a silicone having a polyglycerin chain in the molecule. The polyglycerin chain may be introduced at any position, and may be introduced in any form, such as at one end, both ends, or side chain. However, the polyglycerin chain is preferably present in a side chain or at the end of the silicone chain, and more preferably in a silicone having a monovalent polyglyceryl group in a side chain or at the end of the silicone chain. Specific examples of polyglycerin-modified silicones include polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-3 disiloxane dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, cetyl diglyceryl tris(trimethylsiloxy)silylethyl dimethicone, and bis(polyglyceryl-3-oxyphenylpropyl) dimethicone.

[0079] Commercially available polyglycerin-modified silicones include "KF-6100," "KF-6104," "KF6106," and "KF-6105" manufactured by Shin-Etsu Chemical Co., Ltd., "DOWSI ES-5600 Silicone Glycerol Emulsifier" manufactured by Dow Toray Co., Ltd., and "SOFCARE GS-G" manufactured by Kao Corporation.

[0080] Amino-modified silicone Examples of amino-modified silicones include silicones that have an amino group or an ammonium group-containing group in the main chain or side chain, such as dimethylpolysiloxane (dimethicone) and methylphenylpolysiloxane, and do not have a polyether structure. Preferred examples include silicones represented by the following general formula (2):

[0081] [ka] [In the formula, R 11 each independently represents a methyl group or a phenyl group, R 12 are each independently an alkyl group having 1 to 30 carbon atoms, a hydroxy group, or R 13 Indicates R 13 Ha-R 14 -Z 1 (R 14 represents a single bond or a divalent hydrocarbon group having 1 to 20 carbon atoms, and Z 1 represents a primary to tertiary amino group-containing group or an ammonium group-containing group. a represents a monovalent group represented by the formula: a is a number of 0 or more and 3,000 or less, b is a number of 1 or more and 3,000 or less, and a+b is a number of 3,000 or more and 20,000 or less.

[0082] In general formula (2), R 11 is preferably a methyl group, and R 12 is preferably a methyl group or R 13 is. R 15 Ha-R 14 -Z 1 is a monovalent group represented by R 14 is preferably a divalent hydrocarbon group having from 1 to 20 carbon atoms, more preferably an alkylene group having from 1 to 20 carbon atoms, even more preferably a straight-chain or branched-chain alkylene group having from 1 to 6 carbon atoms, still more preferably a methylene group, ethylene group, trimethylene group, propylene group, tetramethylene group, or hexamethylene group, and even more preferably a trimethylene group or propylene group. Z 1 is a primary to tertiary amino group-containing group or an ammonium group-containing group, and —N(R 15 )2, -NR 15(CH2) c N(R 16 )2, or -NR 15 (CH2) c N(R 16 )CO-R 17 or an amino group-containing group represented by -N + (R 15 )3A - , -NR 15 (CH2) c N+(R 16 )3A - Preferably, R is an ammonium group-containing group represented by the formula: 15 and R 16 R each independently represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and is preferably a hydrogen atom or a methyl group. 17 represents an alkyl group having 1 to 3 carbon atoms. A is a counter anion and represents Cl, Br or I. c represents a number of 1 to 6, preferably 2 to 4.

[0083] In general formula (2), R 13 is preferably —(CH)—NH, —(CH)—N(CH), —(CH)—NH—(CH)—NH, or —(CH)—NH—(CH)—N(CH), and more preferably —(CH)—NH or —(CH)—NH—(CH)—NH.

[0084] Preferred silicones represented by general formula (2) include one or more selected from the group consisting of aminoethylaminopropyl dimethicone (amodimethicone), aminopropyl dimethicone, bis(aminopropyl) dimethicone, and bis(cetearyl) amodimethicone. Commercially available amino-modified silicones include "Silicone SF 8457 C" and "DOWSIL 2-8566 AMINO FLUID" manufactured by Dow Toray Co., Ltd. Also usable is "DOWSIL CF 1046" manufactured by Dow Toray Co., Ltd., which is a mixture of amino-modified silicone and (D) dimethylpolysiloxane, which will be described later.

[0085] One or more types of component (C) can be used. Among the above, amino-modified silicone is preferred from the viewpoints of interaction with the base coat, achieving a texture-improving effect and the durability of this effect, and imparting a smooth and moist feel to the treated object.

[0086] (Component (D): Dimethylpolysiloxane) Component (D) is dimethylpolysiloxane. It is believed that by incorporating components (C) and (D) into composition II, the texture can be improved and the effect can be sustained, and that the effect of imparting a light and natural feel to the treated object can be achieved. The dimethylpolysiloxane used as component (D) preferably has low volatility, and from that perspective, the viscosity at 25°C is preferably 500 mm 2 / s or more, preferably 700 mm 2 / s or more, more preferably 1,000 mm 2 / s or more. In order to impart lightness and naturalness to the object to be treated, component (D) is (D1) a viscosity of 1,000 mm at 25°C. 2 / s or more 10,000mm 2 / s or less, and (D2) dimethylpolysiloxane having a viscosity of 300,000 mm at 25°C 2 / s or more 5 million mm 2 More preferably, the composition contains dimethylpolysiloxane in an amount of dimethylpolysiloxane of 0.1 to 1 / s or less. The viscosity of component (D) is a value measured at 25°C in accordance with the "Method for measuring viscosity of liquids" specified in JIS Z8803:2011 or ASTM D 445-46T, and can be measured, for example, using an Ubbelohde viscometer.

[0087] When component (D) contains component (D1) and component (D2), the mass ratio of component (D1) to component (D2) [(D1) / (D2)] is preferably 0.5 or more, more preferably 1.0 or more, even more preferably 2.0 or more, and is preferably 20 or less, more preferably 10 or less, even more preferably 5.0 or less, in view of the effect of improving texture and the durability of said effect. The mass ratio [(D1) / (D2)] is preferably 0.5 or more and 20 or less, more preferably 1.0 or more and 10 or less, even more preferably 2.0 or more and 5.0 or less.

[0088] When component (D) contains component (D1) and component (D2), the total content of components (D1) and (D2) in component (D) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, and even more preferably 90% by mass or more, but 100% by mass or less, in order to impart lightness and naturalness to the object to be treated.

[0089] (Component (E): Cationic surfactant) From the viewpoint of suitably exhibiting the effect of improving texture and prolonging the effect, it is preferable that the composition II further contains (E) a cationic surfactant. Examples of the cationic surfactant include (i) alkyltrimethylammonium salts, (ii) alkoxyalkyltrimethylammonium salts, (iii) dialkyldimethylammonium salts, (iv) alkylamidoalkyltrimethylammonium salts, (v) alkyldimethylamines and salts thereof, (vi) alkoxyalkyldimethylamines and salts thereof, and (vii) alkylamidoalkyldimethylamines and salts thereof.

[0090] (i) Examples of alkyltrimethylammonium salts include alkyltrimethylammonium salts having an alkyl group preferably having from 12 to 24 carbon atoms, more preferably from 16 to 24 carbon atoms. Specific examples include cetyltrimethylammonium chloride (cetrimonium chloride), stearyltrimethylammonium chloride (steartrimonium chloride), and behenyltrimethylammonium chloride (behentrimonium chloride). (ii) Examples of alkoxyalkyltrimethylammonium salts include alkoxyalkyltrimethylammonium salts having an alkoxy group preferably having from 12 to 22 carbon atoms, more preferably from 16 to 20 carbon atoms. Specific examples include stearoxypropyltrimethylammonium chloride, stearoxyethyltrimethylammonium chloride, and stearoxyhydroxypropyltrimethylammonium chloride. (iii) Examples of dialkyldimethylammonium salts include dialkyldimethylammonium salts having an alkyl group preferably having 12 to 22 carbon atoms, more preferably 16 to 20 carbon atoms, and specific examples thereof include distearyldimethylammonium chloride. (iv) Examples of alkylamidoalkyltrimethylammonium salts include alkylamidoalkyltrimethylammonium salts having preferably an alkyl group having 11 to 21 carbon atoms, more preferably 13 to 19 carbon atoms, and specific examples thereof include palmitamidopropyltrimethylammonium chloride (palmitamidopropyltrimonium chloride).

[0091] (v) Alkyldimethylamine, (vi) alkoxyalkyldimethylamine, and (vii) alkylamidoalkyldimethylamine react with an acid to form a tertiary amine salt, which becomes a cationic surfactant. The alkyl group in (v) alkyldimethylamines and salts thereof, and (vi) alkoxyalkyldimethylamines and salts thereof is preferably an alkyl group having 12 to 22 carbon atoms, more preferably 16 to 20 carbon atoms. (vii) The alkyl group in the alkylamidoalkyldimethylamine and salts thereof is preferably an alkyl group having 11 or more and 21 or less carbon atoms, more preferably 15 or more and 19 or less carbon atoms.

[0092] The amines (v) to (vii) may be reacted with an acid in advance to form a salt and then incorporated into Composition II. Alternatively, the amines may be incorporated into Composition II as they are, and then an acid may be incorporated into Composition II to form a salt therein. Therefore, the above amines and their salts are defined herein as cationic surfactants. The content or amount of the amines is calculated in terms of the mass of the amine. Examples of the amine salts (v) to (vii) include salts with organic or inorganic acids. Examples of organic acids include monocarboxylic acids such as acetic acid and propionic acid; dicarboxylic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, and phthalic acid; polycarboxylic acids such as polyglutamic acid; hydroxycarboxylic acids such as glycolic acid, lactic acid, hydroxyacrylic acid, glyceric acid, malic acid, tartaric acid, and citric acid; and acidic amino acids such as glutamic acid and aspartic acid. Examples of inorganic acids include hydrochloric acid, sulfuric acid, and phosphoric acid. Among these, organic acids are preferred, and one or more selected from the group consisting of dicarboxylic acids, hydroxycarboxylic acids, and acidic amino acids are more preferred. The dicarboxylic acid is more preferably one or more selected from the group consisting of maleic acid and succinic acid. The hydroxycarboxylic acid is more preferably one or more selected from the group consisting of glycolic acid, lactic acid, and malic acid. The acidic amino acid is more preferably glutamic acid.

[0093] (v) Examples of alkyldimethylamines and salts thereof include N,N-dimethylbehenylamine, N,N-dimethylstearylamine, and organic acid salts thereof, with N,N-dimethylbehenylamine lactate and N,N-dimethylstearylamine glycolate being preferred.

[0094] (vi) Examples of alkoxyalkyldimethylamines and salts thereof include N,N-dimethyl-3-hexadecyloxypropylamine, N,N-dimethyl-3-octadecyloxypropylamine, and organic acid salts thereof, and N,N-dimethyl-3-hexadecyloxypropylamine or a lactate thereof, and N,N-dimethyl-3-octadecyloxypropylamine (stearoxypropyldimethylamine) or a lactate thereof are preferred.

[0095] (vii) Examples of alkylamidoalkyldimethylamines and salts thereof include N-[3-(dimethylamino)propyl]docosanamide, N-[3-(dimethylamino)propyl]stearamide, and organic acid salts thereof, and preferred are the lactate salt of N-[3-(dimethylamino)propyl]docosanamide and the glycolate salt of N-[3-(dimethylamino)propyl]stearamide.

[0096] The component (E) can be used alone or in combination of two or more. Among the above, from the viewpoint of improving the stability of the composition, component (E) is preferably at least one selected from the group consisting of (i) alkyltrimethylammonium salts, (ii) alkoxyalkyltrimethylammonium salts, (iii) dialkyldimethylammonium salts, (iv) alkylamidoalkyltrimethylammonium salts, (v) alkyldimethylamines and salts thereof, (vi) alkoxyalkyldimethylamines and salts thereof, and (vii) alkylamidoalkyldimethylamines and salts thereof, and more preferably a mixture of (i) alkyltrimethylammonium salts and (vi) alkoxyalkyldimethylamines and salts thereof. The alkyl acrylate is more preferably one or more selected from the group consisting of cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, N,N-dimethyl-3-hexadecyloxypropylamine or a lactate thereof, and N,N-dimethyl-3-octadecyloxypropylamine (stearoxypropyldimethylamine) or a lactate thereof, and even more preferably one or more selected from the group consisting of behenyltrimethylammonium chloride and N,N-dimethyl-3-octadecyloxypropylamine (stearoxypropyldimethylamine) or a lactate thereof.

[0097] (Component (F): Higher alcohol) From the viewpoint of improving the stability of the composition, it is preferable that the composition II further contains (F) a higher alcohol. Examples of higher alcohols include aliphatic monohydric alcohols having 12 or more carbon atoms, preferably 12 to 22 carbon atoms. Examples of such higher alcohols include one or more selected from the group consisting of lauryl alcohol, cetyl alcohol, myristyl alcohol, oleyl alcohol, stearyl alcohol, isostearyl alcohol, 2-octyldodecanol, behenyl alcohol, and cetostearyl alcohol. Among the above, from the viewpoint of further improving the feel of the object to be treated, one or more alcohols selected from the group consisting of cetyl alcohol, myristyl alcohol, stearyl alcohol, and behenyl alcohol are preferred.

[0098] (water) Composition II preferably contains water in order to be an emulsion composition. The water used in Composition II is preferably deionized water or distilled water. However, tap water or groundwater sterilized with hypochlorous acid or the like may be used as long as the stability of the composition is not impaired.

[0099] (Other ingredients) Composition II may contain, as optional components, organic or inorganic acids, anionic surfactants, nonionic surfactants, amphoteric surfactants, aromatic alcohols such as phenoxyethanol, non-aromatic polyols such as dipropylene glycol, oils other than components (C), (D), and (F), antioxidants, antidandruff agents, vitamins, disinfectants, anti-inflammatory agents, preservatives, chelating agents, moisturizers, pearlizing agents, ceramides, fragrances, plant extracts, UV absorbers, pH adjusters, and the like.

[0100] (pH) From the viewpoints of adsorption to hair and stability of the composition, the pH of Composition II is preferably 3.0 or more, more preferably 3.2 or more, as calculated by diluting Composition II 20 times with water at 25° C. From the viewpoint of improving the stability of the composition, the pH is 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. The pH can be measured using a pH meter.

[0101] (viscosity) From the viewpoints of ease of polyion complex formation, ease of shaping the object to be treated and its durability, particularly the effect of inhibiting hair frizz and its durability, and improving the stability of the composition, the viscosity of Composition II at 30°C is 10,000 mPa-s or more, preferably 30,000 mPa-s or more, and more preferably 60,000 mPa-s or more. From the viewpoints of ease of polyion complex formation and handleability, the viscosity of Composition II is preferably 200,000 mPa-s or less, more preferably 150,000 mPa-s or less, and even more preferably 120,000 mPa-s or less. The viscosity of Composition II at 30°C is preferably 10,000 mPa-s or more and 200,000 mPa-s or less, more preferably 30,000 mPa-s or more and 150,000 mPa-s or less, and even more preferably 60,000 mPa-s or more and 120,000 mPa-s or less. The viscosity of Composition II at 30°C can be measured by the method specifically described in the Examples.

[0102] (Content) The content of component (C) in composition II 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 0.5% by mass or more, from the viewpoint of achieving a texture-improving effect and prolonging the effect, and imparting smoothness and moistness to the treated object. Furthermore, from the viewpoint of improving the stability of the composition, it is preferably 5.0% by mass or less, more preferably 3.0% by mass or less, even more preferably 2.0% by mass or less, and even more preferably 1.0% by mass or less. The content of component (C) in composition II is preferably 0.01% by mass or more to 5.0% by mass or less, more preferably 0.02% by mass or more to 3.0% by mass or less, even more preferably 0.05% by mass or more to 2.0% by mass or less, still more preferably 0.1% by mass or more to 1.0% by mass or less, and even more preferably 0.5% by mass or more to 1.0% by mass or less.

[0103] The content of component (D) in composition II is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, and even more preferably 1.0% by mass or more, from the viewpoint of achieving a texture-improving effect and prolonging the effect, and imparting a light and natural feel to the treated object. Furthermore, from the viewpoint of improving the stability of the composition, it is preferably 15% by mass or less, more preferably 10% by mass or less, even more preferably 8.0% by mass or less, even more preferably 5.0% by mass or less, and even more preferably 4.0% by mass or less. The content of component (D) in composition II is preferably 0.05% by mass or more and 15% by mass or less, more preferably 0.1% by mass or more and 10% by mass or less, even more preferably 0.3% by mass or more and 8.0% by mass or less, even more preferably 0.5% by mass or more and 5.0% by mass or less, and even more preferably 1.0% by mass or more and 4.0% by mass or less.

[0104] The total content of components (C) and (D) in composition II is preferably 0.06% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, even more preferably 0.6% by mass or more, and even more preferably 1.0% by mass or more, from the viewpoint of improving texture and the duration of said effect. Furthermore, from the viewpoint of improving the stability of the composition, it is preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less, even more preferably 6.0% by mass or less, and even more preferably 5.0% by mass or less. The total content of components (C) and (D) in composition II is preferably 0.06% by mass or more to 20% by mass or less, more preferably 0.1% by mass or more to 15% by mass or less, even more preferably 0.3% by mass or more to 10% by mass or less, even more preferably 0.5% by mass or more to 10% by mass or less, even more preferably 0.6% by mass or more to 6.0% by mass or less, and even more preferably 1.0% by mass or more to 5.0% by mass or less.

[0105] From the viewpoint of the texture-improving effect and the duration of said effect, the mass ratio of component (C) to component (D) in composition II [(C) / (D)] is preferably 0.02 or more, more preferably 0.05 or more, even more preferably 0.1 or more, still more preferably 0.2 or more, and is preferably 20 or less, more preferably 10 or less, even more preferably 5.0 or less, still more preferably 2.0 or less, still more preferably 1.0 or less, still more preferably 0.5 or less, and still more preferably 0.3 or less. The mass ratio [(C) / (D)] is preferably 0.02 or more and 20 or less, more preferably 0.02 or more and 10 or less, even more preferably 0.05 or more and 5.0 or less, still more preferably 0.05 or more and 2.0 or less, still more preferably 0.1 or more and 1.0 or less, still more preferably 0.1 or more and 0.5 or less, and still more preferably 0.2 or more and 0.3 or less.

[0106] When the composition II contains component (E), the content of component (E) in the composition II is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.5% by mass or more, and even more preferably 2.0% by mass or more, from the viewpoint of stability of the composition. Furthermore, from the viewpoint of improving the stability of the composition, the content of component (E) is preferably 10% by mass or less, more preferably 5.0% by mass or less, even more preferably 3.5% by mass or less, and even more preferably 3.0% by mass or less. The content of component (E) in the composition II is preferably 0.1% by mass or more and 10% by mass or less, more preferably 0.2% by mass or more and 5.0% by mass or less, even more preferably 0.5% by mass or more and 3.5% by mass or less, and even more preferably 2.0% by mass or more and 3.0% by mass or less.

[0107] When the composition II contains component (F), the content of component (F) in the composition II is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.5% by mass or more, still more preferably 1.0% by mass or more, and even more preferably 5.0% by mass or more, from the viewpoint of stability of the composition. Furthermore, from the viewpoint of improving the stability of the composition, the content of component (F) is preferably 15% by mass or less, more preferably 12% by mass or less, and even more preferably 10% by mass or less. The content of component (F) in the composition II is preferably 0.1% by mass or more and 15% by mass or less, more preferably 0.2% by mass or more and 12% by mass or less, even more preferably 0.5% by mass or more and 12% by mass or less, still more preferably 1.0% by mass or more and 10% by mass or less, and even more preferably 5.0% by mass or more and 10% by mass or less.

[0108] When the composition II contains water, the water content in the composition II is preferably 10% by mass or more, more preferably 20% by mass or more, and even more preferably 30% by mass or more, from the viewpoint of improving the stability of the composition. Furthermore, from the viewpoint of improving the stability of the composition and from the viewpoint of the flexibility of formulation, the water content is preferably 99% by mass or less, more preferably 95% by mass or less, and even more preferably 90% by mass or less. The water content in the composition II is preferably 10% by mass or more and 99% by mass or less, more preferably 20% by mass or more and 95% by mass or less, and even more preferably 30% by mass or more and 90% by mass or less. The water content in the composition may be the balance of the components (C) and (D), and the optional components (E) and (F).

[0109] (Production method of composition II) The method for producing Composition II is not particularly limited, and it can be produced by dissolving or dispersing the above-mentioned components in water. Among these, from the viewpoint of facilitating the shaping of the object to be treated and improving the durability of this effect, particularly improving the effect of inhibiting hair frizz and improving the durability of this effect, and from the viewpoint of producing a composition with even higher stability, it is preferable to produce it by a method having the following steps M4 to M5 in order. Step M4: A step of preparing an emulsion (4) by mixing an aqueous phase (4-1) containing water with an oily phase (4-2) containing (D) a cationic surfactant and (E) a higher alcohol. Step M5: A step of mixing the emulsion (4) with an oily phase (5) containing (C) one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones, and (D) dimethylpolysiloxane.

[0110] (Application to hair) When step 1 is performed first and then step 2 is performed, composition I is applied directly to the hair. In this case, the film formed by composition I acts as a base coat and has good adhesion to the hair. When step 1 is performed after step 2, composition I is applied to the hair to which composition II has been applied first. In this case, the film formed by composition I acts as a top coat and is likely to achieve an excellent texture regardless of the diameter or degree of damage of the hair. The method for applying the composition II to the hair may be any method that can bring the composition II into contact with the hair, and examples thereof include a method of applying the composition to the hair, and a method of immersing dry or wet hair in the composition.

[0111] The amount of Composition II applied to the hair is, in terms of dry hair mass: mass of Composition II, preferably 1:0.01 to 1:5, more preferably 1:0.05 to 1:1, and even more preferably 1:0.1 to 1:0.5, from the viewpoint of the texture-improving effect, the durability of the effect, and the economical balance.

[0112] From the viewpoint of improving the lightness and moist feeling of hair after application to the hair, the ratio of the amount of composition I applied to the hair to the amount of composition II applied to the hair, in terms of the mass of composition I:the mass of composition II, is preferably 5:1 to 1:5, more preferably 3:1 to 1:3.

[0113] In relation to the above-described embodiment, the present invention further discloses the following. <1> A hair treatment method comprising the following steps 1 and 2 in any order, without rinsing the hair with water between steps 1 and 2. Step 1: Applying composition I containing the following components (A) and (B) to hair: Component (A): A cationic polymer having a viscosity of 1% by mass aqueous solution at 30°C of 1,000 mPa-s or more Component (B): Anionic polymer Step 2: Applying composition II containing the following components (C) and (D) to hair: Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane <2> The viscosity of a 1% by mass aqueous solution of the component (A) at 30°C is 1,000 mPa-s or more and 100,000 mPa-s or less, preferably 1,300 mPa-s or more and 80,000 mPa-s or less, more preferably 1,500 mPa-s or more and 50,000 mPa-s or less, even 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 hair treatment method according to claim 1. <3> The weight average molecular weight (Mw) of the component (A) is 5,000 or more and 3,000,000 or less, preferably 10,000 or more and 2,000,000 or less, more preferably 30,000 or more and 2,000,000 or less, even more preferably 50,000 or more and 1,500,000 or less, and still more preferably 100,000 or more and 1,500,000 or less, <1> or <2> The hair treatment method according to claim 1. <4> The cationic charge density of the component (A) is 0.1 mmol / g or more and 20 mmol / g or less, preferably 0.2 mmol / g or more and 15 mmol / g or less, more preferably 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, still more preferably 0.3 mmol / g or more and 7.0 mmol / g or less, and still more preferably 0.5 mmol / g or more and 5.0 mmol / g or less, <1> ~ <3> The hair treatment method according to any one of the above. <5> the component (A) is at least one 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 copolymer (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; <1> ~ <4> The hair treatment method according to any one of the above. <6> The component (A) is a polymer containing a structural unit represented by the following general formula (1): <1> ~ <5> The hair treatment method according to any one of the above. [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. <7> 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 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. <6> The hair treatment method according to claim 1. <8> The component (A) is at least one selected from the group consisting of methacryloylethyltrimethylammonium salt polymers and quaternized dialkylaminoalkyl (meth)acrylate polymers, preferably methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-methoxypolyethylene glycol methacrylate copolymer (Polyquaternium-49), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-hydroxymethacrylate 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> The hair treatment method according to any one of the above. <9> The content of component (A) in the composition I is 0.01% by mass or more and 3.0% by mass or less, preferably 0.02% by mass or more and 2.5% by mass or less, more preferably 0.05% by mass or more and 2.0% by mass or less, even 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 0.5% by mass or less, <1> ~ <8> The hair treatment method according to any one of the above. <10> The component (B) contains one or more anionic polymers selected from the group consisting of crosslinked polymers containing structural units derived from (meth)acrylic acid and anionic polysaccharides. <1> ~ <9> The hair treatment method according to any one of the above. <11> The crosslinked polymer containing a structural unit derived from (meth)acrylic acid is at least one selected from the group consisting of a carboxyvinyl polymer or a salt thereof, an (acrylate / C10-30 alkyl acrylate) crosspolymer, a (sodium acrylate / acryloyldimethyltaurine / dimethylacrylamide) crosspolymer, and an acrylate crosspolymer-4. <10> The hair treatment method according to claim 1. <12> The anionic polysaccharide is a polysaccharide having a carboxy group or a salt thereof, preferably alginic acid, carboxymethylcellulose, or a salt thereof, more preferably alginic acid or a salt thereof. <10> The hair treatment method according to claim 1. <13> The content of component (B) in the composition I is 0.005% by mass or more and 3.0% by mass or less, preferably 0.01% by mass or more and 2.0% by mass or less, more preferably 0.02% by mass or more and 1.5% by mass or less, even 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, still more preferably 0.02% by mass or more and 0.1% by mass or less, and still more preferably 0.02% by mass or more and 0.08% by mass or less, <1> ~ <12> The hair treatment method according to any one of the above. <14> The total content of component (A) and component (B) in composition I is 0.15% by mass or more and 6.0% by mass or less, more preferably 0.02% by mass or more and 5.0% by mass or less, even more preferably 0.03% by mass or more and 4.5% by mass or less, still more preferably 0.04% by mass or more and 4.0% by mass or less, still more preferably 0.05% by mass or more and 3.8% by mass or less, still more preferably 0.07% by mass or more and 3.5% by mass or less, still more preferably 0.07% by mass or more and 3.5% by mass or less, % by mass or less, even more preferably 0.1% by mass or more and 3.0% by mass or less, even more preferably 0.12% by mass or more and 2.5% by mass or less, even more preferably 0.22% by mass or more and 2.0% by mass or less, even more preferably 0.22% by mass or more and 0.8% by mass or less, even more preferably 0.22% by mass or more and 0.7% by mass or less, even more preferably 0.22% by mass or more and 0.6% by mass or less, and even more preferably 0.22% by mass or more and 0.58% by mass or less, <1> ~ <13> The hair treatment method according to any one of the above. <15> the mass ratio of component (A) to component (B) contained in the composition I [(A) / (B)] is 1.0 or more and 20 or less, preferably 2.0 or more and 15 or less, more preferably 3.0 or more and 12 or less, even more preferably 4.0 or more and 12 or less, and still more preferably 5.0 or more and 10 or less; <1> ~ <14> The hair treatment method according to any one of the above. <16> The polyglycerin-modified silicone is at least one selected from the group consisting of polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-3 disiloxane dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, cetyl diglyceryl tris(trimethylsiloxy)silylethyl dimethicone, and bis(polyglyceryl-3-oxyphenylpropyl) dimethicone. <1> ~ <15> The hair treatment method according to any one of the above. <17> The amino-modified silicone is a silicone represented by the following general formula (2): <1> ~ <16> The hair treatment method according to any one of the above. [ka] [In the formula, R 11each independently represents a methyl group or a phenyl group, R 12 are each independently an alkyl group having 1 to 30 carbon atoms, a hydroxy group, or R 13 Indicates R 13 Ha-R 14 -Z 1 (R 14 represents a single bond or a divalent hydrocarbon group having 1 to 20 carbon atoms, and Z 1 represents a primary to tertiary amino group-containing group or an ammonium group-containing group. a represents a monovalent group represented by the formula: a is a number of 0 or more and 3,000 or less, b is a number of 1 or more and 3,000 or less, and a+b is a number of 3,000 or more and 20,000 or less. <18> The amino-modified silicone is at least one selected from the group consisting of aminoethylaminopropyl dimethicone [amodimethicone], aminopropyl dimethicone, bis(aminopropyl) dimethicone, and bis(cetearyl) amodimethicone. <17> The hair treatment method according to claim 1. <19> The content of component (C) in the composition II is 0.01% by mass or more and 5.0% by mass or less, preferably 0.02% by mass or more and 3.0% by mass or less, more preferably 0.05% by mass or more and 2.0% by mass or less, even more preferably 0.1% by mass or more and 1.0% by mass or less, and still more preferably 0.5% by mass or more and 1.0% by mass or less. <1> ~ <18> The hair treatment method according to any one of the above. <20> The component (D) has a viscosity of 300,000 mm at 25°C. 2 / s or more 5 million mm 2 / s or less of dimethylpolysiloxane, <1> ~ <19> The hair treatment method according to any one of the above. <21> The content of component (D) in the composition II is 0.05% by mass or more and 15% by mass or less, preferably 0.1% by mass or more and 10% by mass or less, more preferably 0.3% by mass or more and 8.0% by mass or less, even more preferably 0.5% by mass or more and 5.0% by mass or less, and still more preferably 1.0% by mass or more and 1.0% by mass or less, <1> ~ <20> The hair treatment method according to any one of the above. <22> the total content of component (C) and component (D) in composition II is 0.06% by mass or more and 20% by mass or less, preferably 0.1% by mass or more and 15% by mass or less, more preferably 0.3% by mass or more and 10% by mass or less, even more preferably 0.5% by mass or more and 10% by mass or less, still more preferably 0.6% by mass or more and 6.0% by mass or less, and still more preferably 1.0% by mass or more and 5.0% by mass or less, <1> ~ <21> The hair treatment method according to any one of the above. <22> The composition II further contains (E) a cationic surfactant. <1> ~ <21> The hair treatment method according to any one of the above. <23> The cationic surfactant is at least one selected from the group consisting of (i) alkyltrimethylammonium salts, (ii) alkoxyalkyltrimethylammonium salts, (iii) dialkyldimethylammonium salts, (iv) alkylamidoalkyltrimethylammonium salts, (v) alkyldimethylamines and salts thereof, (vi) alkoxyalkyldimethylamines and salts thereof, and (vii) alkylamidoalkyldimethylamines and salts thereof, more preferably at least one selected from the group consisting of (i) alkyltrimethylammonium salts and (vi) alkoxyalkyldimethylamines and salts thereof, More preferably, it is one or more selected from the group consisting of cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, N,N-dimethyl-3-hexadecyloxypropylamine or a lactate thereof, and N,N-dimethyl-3-octadecyloxypropylamine (stearoxypropyldimethylamine) or a lactate thereof, and even more preferably, it is one or more selected from the group consisting of behenyltrimethylammonium chloride and N,N-dimethyl-3-octadecyloxypropylamine (stearoxypropyldimethylamine) or a lactate thereof. <22> The hair treatment method according to claim 1. <24> The content of component (E) in the composition II is 0.1% by mass or more and 10% by mass or less, preferably 0.2% by mass or more and 5.0% by mass or less, more preferably 0.5% by mass or more and 3.5% by mass or less, and even more preferably 1.0% by mass or more and 3.0% by mass or less. <22> or <23> The hair treatment method according to claim 1. <25> The composition II further contains (G) a higher alcohol. <1> ~ <24> The hair treatment method according to any one of the above. <26> The higher alcohol is at least one selected from the group consisting of cetyl alcohol, myristyl alcohol, stearyl alcohol, and behenyl alcohol. <25> The hair treatment method according to claim 1. <27> The content of the component (F) is 0.1% by mass or more and 15% by mass or less, preferably 0.2% by mass or more and 12% by mass or less, more preferably 0.5% by mass or more and 12% by mass or less, even more preferably 1.0% by mass or more and 10% by mass or less, and still more preferably 5.0% by mass or more and 10% by mass or less, <25> or <26> The hair treatment method according to claim 1. <28> The composition I further contains a nonionic polymer (G). <1> ~ <27> The hair treatment method according to any one of the above. <29> The nonionic polymer (G) is 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, 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, 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, <28> The hair treatment method according to claim 1. <30> The content of component (G) in the composition I is 0.01% by mass or more and 3.0% by mass or less, preferably 0.02% by mass or more and 2.5% by mass or less, more preferably 0.05% by mass or more and 2.0% by mass or less, even more preferably 0.1% by mass or more and 1.5% by mass or less, still more preferably 0.1% by mass or more and 1.0% by mass or less, and still more preferably 0.2% by mass or more and 0.6% by mass or less, <28> or <29> The hair treatment method according to claim 1. <31> The composition I further contains (H) an acid. <1> ~ <30> The hair treatment method according to any one of the above. <32> The acid is at least one selected from the group consisting of aliphatic dicarboxylic acids, hydroxycarboxylic acids, and aromatic sulfonic acids, preferably at least one selected from the group consisting of succinic acid, lactic acid, malic acid, glycolic acid, p-toluenesulfonic acid, and naphthalenesulfonic acid, more preferably at least one selected from the group consisting of succinic acid and lactic acid, and even more preferably lactic acid. <31> The hair treatment method according to claim 1. <33> The content of component (H) in the composition I is 0.01% by mass or more and 5.0% by mass or less, preferably 0.02% by mass or more and 3.0% by mass or less, more preferably 0.03% by mass or more and 3.0% 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 3.0% by mass or less, still more preferably 0.1% by mass or more and 2.5% by mass or less, still more preferably 0.2% by mass or more and 2.5% by mass or less, and still more preferably 0.2% by mass or more and 0.5% by mass or less, <31> or <32> The hair treatment method according to claim 1. <34> The viscosity of composition I at 30°C is 1 mPa-s or more and 10,000 mPa-s or less, more preferably 5 mPa-s or more and 5,000 mPa-s or less, and even more preferably 10 mPa-s or more and 1,500 mPa-s or less. , <1> ~ <33> The hair treatment method according to any one of the above. <35> The viscosity of the composition II at 30°C is 10,000 mPa-s or more and 200,000 mPa-s or less, preferably 30,000 mPa-s or more and 150,000 mPa-s or less, and more preferably 60,000 mPa-s or more and 120,000 mPa-s or less. <1> ~ <34> The hair treatment method according to any one of the above. <36> Step 1 and step 2 are carried out consecutively. <1> ~ <35> The hair treatment method according to any one of the above. <37> The method further includes a subsequent step of rinsing the composition I and composition II applied to the hair with water. <1> ~ <36> The hair treatment method according to any one of the above. <38> The method further comprises any one or more steps selected from the following steps A and B: <1> ~ <36> The hair treatment method according to any one of the above. Step A: applying shampoo to the hair and optionally rinsing the shampooed hair; Step A: Applying conditioner to hair and optionally rinsing the conditioned hair <39> A hair treatment kit comprising: composition I containing the following components (A) and (B) for application to hair; and composition II containing the following components (C) and (D) for application to hair. Component (A): A cationic polymer having a viscosity of 1% by mass aqueous solution at 30°C of 1,000 mPa-s or more Component (B): Anionic polymer Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane <40> The present invention relates to a composition for applying to hair, the composition comprising: a composition I containing the following components (A) and (B); and a composition II containing the following components (C) and (D); A hair treatment kit for use in a hair treatment method comprising the steps of applying composition I and composition II to hair in any order, without rinsing the hair with water between the application of composition I and the application of composition II. Component (A): A cationic polymer having a viscosity of 1% by mass aqueous solution at 30°C of 1,000 mPa-s or more Component (B): Anionic polymer Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane <41> 1. Use of a combination of composition I containing components (A) and (B) below, and composition II containing components (C) and (D) below for application to hair, for improving the shape and texture of hair, preferably independent of the diameter and degree of damage of the hair. Component (A): A cationic polymer having a viscosity of 1% by mass aqueous solution at 30°C of 1,000 mPa-s or more Component (B): Anionic polymer Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane <42> 1. Use of a combination of composition I containing components (A) and (B) below, and composition II containing components (C) and (D) below for application to hair, for maintaining hair shape and texture, preferably independent of hair diameter and degree of damage. Component (A): A cationic polymer having a viscosity of 1% by mass aqueous solution at 30°C of 1,000 mPa-s or more Component (B): Anionic polymer Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane <43> Composition I and Composition II are applied to the hair in any order, and the hair is not rinsed with water between the application of Composition I and the application of Composition II. <41> or <42> Use as described in. [Example]

[0114] The present invention will be described below with reference to examples, but the present invention is not limited to the scope of the examples.

[0115] (Measurement of viscosity of 1% by mass aqueous solution of cationic polymer) A 1% by mass aqueous solution 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 (TV-20, manufactured by Toki Sangyo Co., Ltd.). In these examples, cationic polymers other than component (A) are referred to as "component (A')."

[0116] (Measurement of viscosity of composition) The viscosity of Composition I at 30°C was measured using a Brookfield viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd.) at spindle "M3", 12 rpm, and 1 minute. The viscosity of Composition II at 30°C was measured using a Brookfield viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd.) at spindle "TC", 30 rpm, and 1 minute.

[0117] Example 1 (1) Making hair tresses Hair tresses measuring 25 cm in length and weighing 5 g were prepared using straight hair from an Asian woman (thin hair type: hair diameter 40-70 μm; hereafter also referred to as hair type F) and straight hair from an Asian woman (thick hair type: hair diameter 80-110 μm; hereafter also referred to as hair type T).

[0118] (2) Preparation of Composition I and Composition II Composition I-1 was prepared using the components in the amounts shown in Table 1 below as composition I. Composition II-1 was prepared using the components in the amounts shown in Table 1 below as composition II.

[0119] [Table 1]

[0120] [Table 2]

[0121] 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"; charge density 0.83 mmol / g, 1% viscosity 2560 mPa-s, active ingredient content: 2.4% by mass *2 Polyquaternium-37 (methacryloylethyltrimethylammonium chloride polymer), BASF Japan Cosmedia Ultragel 300; charge density 4.81 mmol / g, 1% viscosity 17650 mPa-s

[0122] <Component (A'): Cationic polymer other than component (A)> *3 Polyquaternium-10 (cationized hydroxyethyl cellulose), Dow Chemical Japan Co., Ltd. "UCARE Polymer JR-400P"; 1% viscosity 200 mPa-s or less *4 Polyquaternium-22 (dimethyldiallylammonium chloride-acrylic acid copolymer liquid), "Marcote 295" manufactured by Lubrizol Advanced Materials, Inc.; charge density 6.04 mmol / g, 1% viscosity 5.6 mPa-s, active ingredient content: 37% by mass

[0123] <Component (B): Anionic polymer> *5 Sodium alginate, Kimika Algin I-3-150, manufactured by Kimika Co., Ltd., Mw: 90,000 *6 Carboxymethylcellulose, Daiichi Kogyo Seiyaku Co., Ltd. "Cellogen F-5a", Mw: 150,000 *7 Acrylates / C10-30 alkyl acrylate crosspolymer, "Pemulen TR-1 Polymer" manufactured by Lubrizol Advanced Materials, Inc.

[0124] <Component (G): Nonionic polymer> *8 Polyvinylpyrrolidone, BASF Japan Ltd. "Ruviscol K90", Mw: 1.2 million

[0125] <Component (H): Acid> *9 90% lactic acid, "PURAC ULTRAPURE90" manufactured by PURAC Thailand Ltd.

[0126] <Other> *10 Dipropylene glycol, ADEKA Corporation "DPG-RF"

[0127] <Component (C): Modified silicone> *11 Amino-modified silicone, "DOWSIL 2-8566 AMINO FLUID" manufactured by Dow Toray Industries, Inc. *12 Amino-modified silicone, "Silicone SF 8457 C" manufactured by Dow Toray Co., Ltd.

[0128] <Component (D): Dimethylpolysiloxane> *13 Dimethylpolysiloxane, "Silicone KHS-3" manufactured by Shin-Etsu Chemical Co., Ltd.

[0129] <Component (C): Modified silicone and component (D): Dimethylpolysiloxane> *14 Dimethylpolysiloxane (number average degree of polymerization 550), a mixture of dimethylpolysiloxane (number average degree of polymerization 2700) and amino-modified silicone (mass ratio 10:3.7:2.9), "DOWSIL CF1046" manufactured by Dow Toray Co., Ltd.

[0130] <Component (E): Cationic surfactant> *15 Stearoxypropyldimethylamine, Kao Corporation's "Farmin DM-E80", active ingredient amount: 90% by mass

[0131] <Component (F): Higher alcohol> *16 Stearyl alcohol, BASF "LANETTE 18"

[0132] (3) Hair treatment ·Pre-process The hair tresses of hair type F and hair tresses of hair type T prepared above were washed with shampoo and rinsed. Then, the hair tresses were towel-dried until the total mass of the hair tresses became 7.5 g (150% of the mass of the hair tresses before washing). ·Process 1 Composition I-1 was applied to each of the hair tresses of hair type F and hair tresses of hair type T so that the mass ratio (bath ratio) of the dry mass of the hair tresses to composition I-1 was 1:0.2, and then the hair tresses were combed five times to spread composition I-1 evenly over the hair tresses. ·Process 2 Next, without rinsing off composition I-1 or performing any other steps, composition II-1 was applied to the hair tress to which composition I-1 had been applied in step 1 so that the mass ratio (bath ratio) of the dry mass of the hair tress to composition II-1 was 1:0.2, and then the hair tress was combed five times to spread composition II-1 evenly over the hair tress. ·Post-process The hair tress was rinsed with warm water at 35°C for 30 seconds, and then blow-dried with warm air using a hair dryer (manufactured by Tescom Electric Co., Ltd., product name "Nobby Professional Protect Ion Hair Dryer NIB3000") held 15 cm away from the hair tress for 2 minutes while combing.

[0133] Evaluation method Using the hair tresses after treatment, two expert panelists evaluated the items "Moisturized feel," "Smoothness," "Softness," "Lightweight effect," and "Natural" on a five-point scale from 1 (significantly low or significantly inferior) to 5 (significantly high or significantly superior).

[0134] Details of the evaluation items are shown below. The moist feeling of hair was evaluated based on the tactile sensation of the hair, such as softness to the touch and suppleness of hair movement. Dry hair is characterized by being brittle and porous, so a low level of porosity is also an indicator of moist feeling. Smoothness was evaluated based on the appearance, lightness, and feel of the hair surface. Hair smoothness is related to the uniformity of the surface, so smooth hair has a shiny and smooth appearance without any protruding frizz or unruly hair fibers. Smooth hair has a uniform, silky feel without roughness or tangles. The softness of the hair was evaluated by touching the hair tress. Soft hair has no resistance and moves flexibly when touched or combed. It can be said that the feel is comfortable and natural. Lightness was assessed by the appearance and feel of the hair. Volume and body are the most important indicators of lightness. At lightness, the hair fiber shows no signs of coating or weight loss. Naturalness was assessed by the appearance and feel of the hair. Unnatural hair can be described as feeling artificial and coated, while natural hair feels soft and light. Natural hair feels healthy and bouncy.

[0135] The average scores of the two expert panelists are shown in Table 3 as the evaluation results. There is a trade-off between smoothness and moist feeling and the evaluation of lightness and naturalness, and a score of 3 or more in both evaluations is considered to be well-balanced and to have a sufficient effect of the present invention.

[0136] Example 2 Hair treatment and evaluation were carried out in the same manner as in Example 1, except that Composition II-2 was prepared using the components of Composition II in the amounts shown in Table 2. The evaluation results are shown in Table 3.

[0137] Example 3 Hair treatment and evaluation were carried out in the same manner as in Example 1, except that composition I-2 was prepared using the components in the amounts shown in Table 1 above for composition I. The evaluation results are shown in Table 3.

[0138] Example 4 Hair treatment and evaluation were carried out in the same manner as in Example 1, except that composition I-3 was prepared using the components in the amounts shown in Table 1 above as composition I. The evaluation results are shown in Table 3.

[0139] Example 5 Hair treatment and evaluation were carried out in the same manner as in Example 1, except that composition I-4 was prepared using the components in the amounts shown in Table 1 above as composition I. The evaluation results are shown in Table 3.

[0140] Example 6 ·Pre-process The pre-processing was carried out in the same manner as in Example 1. ·Process 2 Composition II-1 prepared in the same manner as in Example 1 was applied to each of the hair tresses of hair type F and hair tresses of hair type T so that the mass ratio of the dry mass of the hair tresses to composition II-1 was 1:0.2, and then the hair tresses were combed five times to spread composition II-1 evenly over the hair tresses. ·Process 1 Next, without rinsing off composition II-1 or performing any other steps, composition I-1 prepared in the same manner as in Example 1 was applied to the hair tress to which composition I-1 had been applied in step 1 so that the mass ratio of the dry mass of the hair tress to composition I-1 was 1:0.2, and then the hair tress was combed five times to spread composition I-1 evenly over the hair tress. ·Post-process The post-processing was carried out in the same manner as in Example 1.

[0141] Comparative Example 1 Only composition I-1 was applied to the hair, and the hair was treated and evaluated in the same manner as in Example 1. The evaluation results are shown in Table 3.

[0142] Comparative Example 2 Only Composition II-1 was applied to the hair, and the hair was treated and evaluated in the same manner as in Example 1. The evaluation results are shown in Table 3.

[0143] Comparative Example 3 Hair treatment and evaluation were carried out in the same manner as in Example 1, except that composition I-c1 was prepared using the components in the amounts shown in Table 1 above for composition I. The evaluation results are shown in Table 3.

[0144] Comparative Example 4 Hair treatment and evaluation were carried out in the same manner as in Example 1, except that composition I-c2 was prepared using the components in the amounts shown in Table 1 above for composition I. The evaluation results are shown in Table 3.

[0145] Comparative Example 5 Hair treatment and evaluation were carried out in the same manner as in Example 1, except that composition II-c1 was prepared using the components of composition II in the amounts shown in Table 2. The evaluation results are shown in Table 3.

[0146] Comparative Example 6 Hair treatment and evaluation were carried out in the same manner as in Example 1, except that composition II-c2 was prepared using the components of composition II in the amounts shown in Table 2. The evaluation results are shown in Table 3.

[0147] Comparative Example 7 The hair treatment and evaluation were carried out in the same manner as in Example 1, except that the hair tress was rinsed with warm water at 35° C. for 30 seconds between steps 1 and 2. The evaluation results are shown in Table 3.

[0148] Comparative Example 8 The hair treatment and evaluation were carried out in the same manner as in Example 6, except that the hair tress was rinsed with warm water at 35° C. for 30 seconds between step 2 and step 1. The evaluation results are shown in Table 3.

[0149] [Table 3]

[0150] As shown in Table 3, the hair treatment method of the present invention can achieve an effect of improving the shape and texture of hair and maintain this effect regardless of the diameter of the hair or the degree of damage, and can simultaneously achieve smoothness and moisturization as well as lightness and naturalness. [Industrial Applicability]

[0151] According to the present invention, a hair treatment method can be provided that can achieve an effect of improving the shape and texture of hair and maintain the effect, regardless of the diameter of the hair or the degree of damage, and can simultaneously achieve smoothness and moisturized feeling, as well as lightness and naturalness.

Claims

1. A hair treatment method comprising the following steps 1 and 2 in any order, without rinsing the hair with water between steps 1 and 2. Step 1: Applying composition I containing the following components (A) and (B) to hair: Component (A): A cationic polymer having a viscosity of 1,000 mPa-s or more in a 1% by weight aqueous solution at 30°C. Component (B): Anionic polymer Step 2: Applying composition II containing the following components (C) and (D) to hair: Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane

2. The hair treatment method according to claim 1, wherein the component (A) is a polymer containing a structural unit represented by the following general formula (1): 【Chemical 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. 3. The hair treatment method according to claim 1, wherein the component (B) comprises one or more anionic polymers selected from the group consisting of crosslinked polymers containing structural units derived from (meth)acrylic acid and anionic polysaccharides.

4. The hair treatment method according to claim 3, wherein the component (B) is alginic acid or a salt thereof.

5. The hair treatment method according to any one of claims 1 to 4, wherein the component (A) is at least one selected from the group consisting of methacryloylethyltrimethylammonium chloride polymer and N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer.

6. The component (D) has a viscosity of 300,000 mm at 25°C. ２ / s or more 5 million mm ２ The hair treatment method according to any one of claims 1 to 5, wherein the dimethylpolysiloxane is a dimethylpolysiloxane having a molecular weight of 1 / s or less.

7. The hair treatment method according to any one of claims 1 to 6, wherein the mass ratio [(A) / (B)] of component (A) to component (B) contained in composition I is 1.0 or more and 20 or less.

8. The hair treatment method according to any one of claims 1 to 7, wherein the composition I further contains a nonionic polymer (G).

9. 9. The hair treatment method according to claim 8, wherein the nonionic polymer (G) is at least one selected from the group consisting of polyalkylene glycols or derivatives thereof, and polymers containing structural units derived from vinylpyrrolidone.

10. The hair treatment method according to any one of claims 1 to 9, wherein step 1 and step 2 are carried out consecutively.

11. A hair treatment kit comprising: composition I containing the following components (A) and (B) for application to hair; and composition II containing the following components (C) and (D) for application to hair. Component (A): A cationic polymer having a viscosity of 1,000 mPa-s or more in a 1% by weight aqueous solution at 30°C. Component (B): Anionic polymer Component (C): one or more modified silicones selected from the group consisting of polyglycerin-modified silicones and amino-modified silicones; Component (D): Dimethylpolysiloxane

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