Hair treatment method

Abstract

The present invention relates to a hair treatment method wherein the hair treatment method comprises: the following step 1 and step 2, carried out in any order, and does not comprise: rinsing the hair with water between step 1 and step 2: step 1: a step of applying to the hair a composition I comprising the following component (A) and component (B); component (A): a cationic polymer having a viscosity of 1,000 mPa-s or more in a 1 mass% aqueous solution at 30 DEG C; component (B): an anionic polymer; step 2: a step of applying a composition II comprising the following component (C) and component (D); component (C): one or more modified silicones selected from the group consisting of polyglycerol-modified silicones and amino-modified silicones; and component (D): dimethyl polysiloxane.

Description

Technical Field

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

[0002] Various approaches have been proposed to improve hair texture.

[0003] For example, International Publication No. 2010 / 141683 (Patent Document 1) discloses a composite product system for keratin materials as a hair treatment method using the composite product system, the composite product system providing an improved conditioning effect for hair, comprising: applying a predetermined amount of a hair cleansing composition to the hair, wherein the hair cleansing composition comprises a carrier, a specific surfactant and a predetermined amount of a silicone emulsion; and applying a predetermined amount of a hair conditioning composition to the hair, wherein the hair conditioning composition contains a cationic surfactant, a high melting point fatty compound and an aqueous carrier and has predetermined physical properties.

[0004] International Publication No. 2017 / 151995 (Patent Document 2) discloses a method for treating hair to provide an improved conditioning effect, wherein the conditioning effect is, for example, a manageable feel and / or reduced frizz or friction, the method comprising: a) applying a shampoo composition containing a cleansing surfactant to the hair, wherein the shampoo composition is substantially free of silicone conditioning agents; b) rinsing the shampoo composition from the hair; and c) applying a conditioning composition containing a silicone resin and an aminosilicone to the hair, wherein the aminosilicone has a non-quaternized functional group and / or a quaternary amine functional group.

[0005] International Publication No. 2016 / 151139 (Patent Document 3) discloses a cosmetic hair treatment method for care and / or cleansing, the method comprising: step (i) applying a first cosmetic composition containing a cationic surfactant, silicone and a non-silicone greasy substance to the hair; step (ii) applying a second cosmetic composition containing a cationic surfactant, a predetermined cationic polymer and an organic silane to the hair; and excluding: an intermediate rinsing process between the application steps (i) and (ii).

[0006] 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

[0007] The present invention relates to a hair treatment method, wherein the hair treatment method comprises: the following steps 1 and 2 performed in any order, and does not include: rinsing the hair with water between steps 1 and 2:

[0008] Step 1: a step of applying a composition I containing the following components (A) and (B) to the hair;

[0009] Component (A): a cationic polymer having a viscosity of 1000 mPa-s or more in a 1 mass % aqueous solution at 30°C;

[0010] Component (B): anionic polymer;

[0011] Step 2: a step of applying composition II containing the following components (C) and (D) to the hair;

[0012] Component (C): one or more modified silicones selected from polyglycerol-modified silicones and amino-modified silicones;

[0013] Ingredient (D): dimethyl polysiloxane. DETAILED DESCRIPTION

[0014] Hair problems include hair shape problems such as frizz, fluff, wave, curl, flyaway, etc., and hair texture problems such as dryness, and a hair treatment method is needed to improve these problems.

[0015] In conventional hair care methods, there is a trade-off between smoothness and moisture and lightness and naturalness for the hair to be treated, and it is difficult to obtain hair that is excellent in all aspects. It is particularly difficult to achieve excellent texture regardless of the hair diameter and degree of damage. For example, a formula designed for thick hair tends to give a heavy feel when applied to fine hair due to excessive silicone ingredients adhering to the hair. In addition, the hair surface is covered with a cuticle layer, which is hydrophobic; however, it is well known that excessive washing or combing of hair, or chemical treatments such as perms and bleaching can cause the cuticle layer to deteriorate or peel off, causing the hair surface to become hydrophilic. Therefore, a formula designed for highly damaged hair tends to give a heavy feel to lightly damaged hair because excessive amounts of hydrophobic touch enhancers, such as silicone, adhere to the hair.

[0016] The technology described in Patent Document 1 is a formulation substantially free of anionic polymers, and is insufficient in terms of wash fastness and moisturizing properties of hair.

[0017] 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, is a general shampoo and treatment composition that uses an MQ resin instead of a silicone compound, and is insufficient in terms of wash resistance and lightening effect.

[0018] The technology described in Patent Document 3 is a formulation that does not contain a cationic polymer and an anionic polymer in the same composition, like the technology described in Patent Document 2.

[0019] The present invention relates to a hair treatment method that can achieve the effect of improving hair shape and texture and the effect is sustainable regardless of the hair diameter and degree of damage. In particular, the present invention relates to a hair treatment method that can achieve smoothness and moisturization and lightness and naturalness at the same time, which are usually difficult to achieve at the same time.

[0020] The present inventors have found that a hair treatment method can be provided, which comprises two steps performed in any order: step 1 is applying a predetermined composition I to the hair; step 2 is applying a predetermined composition II to the hair, and rinsing the hair with water is not included between step 1 and step 2, thereby achieving the effect of improving the shape and texture of the hair and the effect is sustainable, regardless of the diameter of the hair and the degree of damage, and achieving both smoothness and moisturization and lightness and naturalness.

[0021] The present invention includes the following hair treatment method and hair treatment kit:

[0022] [1] A hair treatment method, wherein the hair treatment method comprises: the following steps 1 and 2 performed in any order, and does not include: rinsing the hair with water between steps 1 and 2:

[0023] Step 1: a step of applying a composition I containing the following components (A) and (B) to the hair;

[0024] Component (A): a cationic polymer having a viscosity of 1000 mPa-s or more in a 1 mass % aqueous solution at 30°C;

[0025] Component (B): anionic polymer;

[0026] Step 2: a step of applying composition II containing the following components (C) and (D) to the hair;

[0027] Component (C): one or more modified silicones selected from polyglycerol-modified silicones and amino-modified silicones;

[0028] Ingredient (D): dimethyl polysiloxane.

[0029] [2] A hair treatment kit, comprising: a composition I for application to hair comprising the following components (A) and (B), and a composition II for application to hair comprising the following components (C) and (D),

[0030] Component (A): a cationic polymer having a viscosity of 1000 mPa-s or more in a 1 mass % aqueous solution at 30°C;

[0031] Component (B): anionic polymer;

[0032] Component (C): one or more modified silicones selected from polyglycerol-modified silicones and amino-modified silicones; and

[0033] Ingredient (D): dimethyl polysiloxane.

[0034] The present invention provides a hair treatment method which can achieve the effect of improving hair shape and texture and the effect is sustainable regardless of the hair diameter and degree of damage, and can achieve smoothness and moisturization with lightness and naturalness at the same time.

[0035] <Hair treatment method>

[0036] The hair treatment method of the present invention comprises: the following steps 1 and 2 performed in any order, and does not include: rinsing the hair with water between steps 1 and 2:

[0037] Step 1: a step of applying a composition I containing the following components (A) and (B) to the hair;

[0038] Component (A): a cationic polymer having a viscosity of 1000 mPa-s or more in a 1 mass % aqueous solution at 30°C;

[0039] Component (B): anionic polymer;

[0040] Step 2: a step of applying composition II containing the following components (C) and (D);

[0041] Component (C): one or more modified silicones selected from polyglycerol-modified silicones and amino-modified silicones;

[0042] Ingredient (D): dimethyl polysiloxane.

[0043] In this specification, "containing ingredient X" also includes formulated ingredient X.

[0044] Through the hair treatment method comprising the above steps 1 and 2, it has been found that the hair treatment method of the present invention can achieve the effect of improving hair shape and texture and this effect is sustainable regardless of hair diameter and degree of damage, and can achieve smoothness and moisturization with lightness and naturalness at the same time.

[0045] Why the hair processing method according to the present invention can achieve the above effects is not yet certain; however, the reason is presumed to be as follows.

[0046] Composition I contains a predetermined cationic polymer as component (A) and an anionic polymer as component (B), and forms a water-insoluble film composed of a so-called polyion complex on the hair, wherein the cross-linked structure in the polyion complex is formed by ionic interaction between component (A) and component (B). It is presumed that the film formed by composition I can adjust the shape of the hair.

[0047] Furthermore, composition II contains component (C) a predetermined modified silicone, and component (D) dimethylpolysiloxane, which are presumably capable of forming a durable hydrophobic film and affecting the texture (feel) of hair.

[0048] Furthermore, after treating the hair with composition I, the film formed by composition II is believed to achieve lightness and naturalness at the same time, improving smoothness and moisturization without overloading. The reason for this comprehensive effect is that the polyion complex formed by composition I can have polar interactions with modified silicone, as well as hydrophobic interactions with dimethylpolysiloxane in composition II. Thus, the absorption amount can be adjusted independently of the hair diameter and the degree of damage. In particular, by not rinsing the hair with water between step 1 and step 2, it can be inferred that the polyion complex formed by composition I will not swell excessively. Without excessive swelling, the polar interactions between the polyion complex formed by composition I and the modified silicone in the film formed by composition II will not be disturbed. Thus, the effect of the present invention occurs on the hair.

[0049] The hair treatment method according to the present invention comprises: the above step 1 and step 2 performed in any order, and does not include: a step of rinsing the hair with water between step 1 and step 2.

[0050] A step other than rinsing the hair with water may or may not be included between step 1 and step 2. From the viewpoint of the effect of the present invention, step 1 and step 2 are preferably performed continuously. "Performed continuously" means that one step is performed immediately after another step, without a step of rinsing the hair with water or a step other than rinsing. Preferably, composition I and composition II are applied to the hair without any other step in between.

[0051] In one preferred aspect of the present invention, from the viewpoint of easily influencing the shape of the object to be treated and improving its sustainability, in particular, the effect of suppressing the spread of hair and its sustainability, regardless of the hair diameter and degree of damage, step 1 and step 2 are performed sequentially. In this case, step 1 directly applies composition I to the hair, and does not include a step of rinsing the hair with water between steps 1 and 2, and step 2 applies composition II to the hair to which composition I has been applied.

[0052] In this way, the polyion complex formed by composition I is first adsorbed by the hair, and then the modified silicone and dimethyl polysiloxane in composition II respectively form polar interactions and hydrophobic interactions with the polyion complex formed by the above composition I. It is speculated that the absorption amount will not be adjusted according to the hair diameter and the degree of damage, so it can not only improve smoothness and moisturization, but also achieve a light and natural effect due to no overload.

[0053] Furthermore, before steps 1 and 2, any one or more steps selected from the following step A and step B may be performed.

[0054] Step A: a step of applying a shampoo to the hair, and optionally rinsing the shampooed hair,

[0055] Step B: a step of applying a conditioner to the hair, and optionally rinsing the hair to which the conditioner is applied.

[0056] After performing step 1 and step 2, it is preferred to perform a subsequent step in which composition I and composition II applied to the hair are rinsed with water. In this case, in order to sufficiently apply composition I and composition II to the hair, a retention time may be set before rinsing with water after performing step 1 and step 2. The retention time is preferably 15 seconds or more, more preferably 30 seconds or more, more preferably 1 minute or more, and is preferably 20 minutes or less, more preferably 15 minutes or less.

[0057] The time for washing composition I and composition II with water is preferably 5 seconds or more and 3 minutes or less. The water temperature may be just enough to relieve the body from tension, preferably 15°C or more and 50°C or less, more preferably 25°C or more and 45°C or less.

[0058] The hair may then optionally be dried, for example with a towel and a hairdryer, or heated, for example with an iron.

[0059] Furthermore, a hair styling agent may be optionally used to style the hair into various shapes.

[0060] {Step 1}

[0061] Step 1 is a step of applying composition I containing the above-mentioned component (A) and component (B) to the hair.

[0062] Specific product forms of the composition I include shampoo, hair rinse, hair conditioner, hair treatment (including leave-in type), hair setting agent, hair dye, permanent care products, etc. Among them, hair conditioner, hair treatment agent or hair setting agent is preferred from the viewpoint of effectiveness of the effect of the present invention.

[0063] The form of the composition I is preferably a liquid or gel composition, and is more preferably a liquid composition from the viewpoint of improving the stability and feel of the composition during use.

[0064] The term "liquid or gel-like" in the present invention means that it 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 Liquid or Solid".

[0065] The components contained in composition I are described below.

[0066] (Component (A): cationic polymer)

[0067] Component (A) is a cationic polymer having a viscosity of 1000 mPa-s or more in a 1 mass % aqueous solution at 30° C., and is a polymer capable of forming a polyion complex by interacting with component (B).

[0068] The cationic polymer of ingredient (A) is preferably a polymer having a cationic group and having a positive overall charge. In addition to the cationic group, ingredient (A) may have an anionic group, a nonionic group or an amphoteric group such as a betaine group, within the range not affecting the effects of the present invention.

[0069] In the present specification, the cationic group is a cationic group or a group that can be ionized to become a cationic group, specifically, a primary amino group, a secondary amino group, a tertiary amino group and a quaternary ammonium group.

[0070] The anionic group is an anionic group or a group that can be ionized to become an anionic group, specifically, one or more selected from acidic groups such as carboxyl groups, sulfonic acid groups, and phosphoric acid groups, preferably one or more selected from carboxyl groups and sulfonic acid groups, more preferably carboxyl groups. At least a portion of the anionic group can be neutralized to a salt state.

[0071] From the viewpoint of easy formation of the polyion complex, easy adjustment of the shape of the object to be treated and improvement of its sustainability, in particular, from the viewpoint of the effect of inhibiting hair spreading and improving its sustainability, and from the viewpoint of improving the stability of the composition, 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, further preferably 1,700 mPa-s or more, and still more preferably 1,800 mPa-s or more. The upper limit of the viscosity is not particularly limited; however, from the viewpoint of ease of forming the polyion complex and operability, the viscosity is preferably 100,000 mPa-s or less, more preferably 80,000 mPa-s or less, further 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 mass % aqueous solution of component (A) at 30° C. is 1,000 mPa-s or more, preferably 1,000 mPa-s or more and 100,000 mPa-s or less, more preferably 1,300 mPa-s or more and 80,000 mPa-s or less, further preferably 1,500 mPa-s or more and 50,000 mPa-s or less, still more preferably 1,700 mPa-s or more and 30,000 mPa-s or less, still more preferably 1800 mPa-s or more and 25,000 mPa-s or less.

[0072] The viscosity of a 1 mass % aqueous solution of the component (A) at 30° C. can be measured by the method specifically described in the Examples.

[0073] The unit of viscosity is "mPa-s", which is the abbreviation of "milliPascal second".

[0074] From the viewpoint of improving film-forming properties, the weight average molecular weight (Mw) of component (A) is preferably 5,000 or more, more preferably 10,000 or more, further preferably 30,000 or more, still more preferably 50,000 or more, and still preferably 100,000 or more. The upper limit of the molecular weight is not particularly limited, but from the viewpoint of ease of forming a polyion complex and operability, 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, further 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 still more preferably 100,000 or more and 1,500,000 or less.

[0075] The weight average molecular weight of the component (A) can be measured by gel permeation chromatography (GPC).

[0076] From the viewpoint of facilitating interaction with component (B) to form a polyion complex and from the viewpoint of improving the stability of the composition, the cationic charge density of component (A) is preferably 0.1 mmol / g or more, more preferably 0.2 mmol / g or more, further preferably 0.3 mmol / g or more, and still more preferably 0.5 mmol / g or more. In addition, from the viewpoint of interaction with the film formed by composition II and from the viewpoint of improving the stability of the composition, the cationic charge density of component (A) is preferably 20 mmol / g or less, more preferably 15 mmol / g or less, further 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, further 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.

[0077] The cationic charge density of the component (A) is the mole number of the cationic group included in 1 g of the polymer. When at least a part of the cationic group of the component (A) becomes a neutralized salt, the mole number of the cationic group in the salt state should be included in the mole number of the above cationic group.

[0078] Two or more polymers may be used as the component (A). In this case, the cationic charge density of the component (A) is determined by calculating a weighted average of the cationic charge densities and blending amounts of the respective polymers.

[0079] As the component (A), any of natural polymers such as cationic polysaccharides or cationic derivatives thereof and synthetic polymers can be used, and synthetic polymers are preferred from the viewpoint of easy availability.

[0080] Specific examples of the polymer used as component (A) include cationic polyvinyl alcohol, polyethyleneimine, methacryloylethyltrimethylammonium salt polymer, quaternized dialkylaminoalkyl (meth) acrylate polymer, diallyl quaternary ammonium salt polymer, methacrylamidopropyltrimethylammonium salt polymer, vinyl imidazole trichloride-vinyl pyrrolidone copolymer (polyquaternium-16), vinyl pyrrolidone-alkylamino (meth) acrylate copolymer, vinyl pyrrolidone-alkylamino (meth) acrylate-vinyl caprolactam copolymer, alkyl acrylamide-(meth) acrylate-alkylaminoalkyl acrylamide-polyethylene glycol (meth) acrylate copolymer, adipic acid-dimethylaminohydroxypropyl ethylenetriamine copolymer, all of which have a viscosity of 1,000 mPa-s or more in a 1% by mass aqueous solution at 30° C., and one or more of them can be used. In the present specification, "(meth) acrylic acid" means acrylic acid or methacrylic acid, and "(meth) acrylate" means acrylate or methacrylate.

[0081] Among them, 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).

[0082] Examples of the quaternized dialkylaminoalkyl (meth)acrylate polymer include vinyl pyrrolidone-N,N-dimethylaminoethyl methacrylate diethyl sulfate copolymer (Polyquaternium-11), N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (Polyquaternium-52).

[0083] Examples of the diallyl quaternary ammonium salt polymer 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).

[0084] Furthermore, examples of the methacrylamide propyl trimethyl ammonium salt polymer include methacrylamide propyl trimethyl ammonium chloride polymer, vinyl pyrrolidone-methacrylamide propyl trimethyl ammonium chloride copolymer, acrylic acid-methacrylate-methacrylamide propyl trimethyl ammonium chloride copolymer (Polyquaternium-47), and acrylic acid-acrylamide-methacrylamide propyl trimethyl ammonium chloride copolymer (Polyquaternium-53).

[0085] From the viewpoint of improving film-forming property and facilitating formation of a polyion complex by interaction with the component (B), the component (A) is preferably a polymer including a structural unit represented by the following general formula (1).

[0086]

[0087] Where R 1 is a hydrogen atom or a methyl group, R 2 To R 4 Each is independently an alkyl group having 1 to 4 carbon atoms, X is -O- or -NH-, and m is a number of 1 or more and 4 or less.

[0088] R in the general formula (1) 1 Preferably, it is methyl, and R 2 To R 4 Each is independently an alkyl group preferably having 1 to 3 carbon atoms, more preferably a methyl group or an ethyl group, and further preferably a methyl group.

[0089] X in the general formula (1) is preferably -O-, and m is preferably 1 or more and 3 or less, and more preferably 2 or more and 3 or less.

[0090] Examples of the structural unit represented by the general formula (1) include one or more selected from the structural unit derived from methacryloylethyltrimethylammonium salt, the structural unit derived from N,N-dimethylaminoethylmethacrylate diethyl sulfate and methacrylamidepropyltrimethylammonium salt, preferably one or more selected from the structural unit derived from methacryloylethyltrimethylammonium salt and the structural unit derived from N,N-dimethylaminoethylmethacrylate diethyl sulfate.

[0091] Ingredient (A) may be a polymer containing other structural units in addition to the structural unit represented by general formula (1). Examples of other structural units include structural units derived from vinyl monomers such as vinyl pyrrolidone; amphoteric monomers such as (meth)acryloylethyl dimethyl betaine; hydroxyalkyl (meth)acrylates such as alkyl (meth)acrylates and 2-hydroxyethyl (meth)acrylate; and acrylamides such as N,N-dimethylacrylamide. In addition, ingredient (A) may be a cross-linked polymer cross-linked with, for example, polyethylene glycol di(meth)acrylate.

[0092] Component (A) can be used alone or in combination of two or more. From the viewpoint of facilitating setting the viscosity of a 1% by mass aqueous solution at 30°C to a predetermined value or more, and from the viewpoint of facilitating the formation of a polyion complex, facilitating the adjustment of the shape of the object to be treated and improving its sustainability, in particular, the effect of inhibiting the spread of hair and improving its sustainability, component (A) is preferably one or more selected from methacryloylethyl trimethylammonium salt polymers and quaternized dialkylaminoalkyl (meth)acrylate polymers; more preferably selected from methacryloylethyl trimethylammonium chloride polymers (polyquaternium-37), methacryloylethyl dimethyl betaine-methacryloylethyl trimethyl ammonium chloride-methoxy polyethylene glycol methacrylate copolymer ( Polyquaternium-49), methacryloylethyl dimethyl betaine-methacryloylethyl trimethyl ammonium chloride-2-hydroxyethyl methacrylate copolymer (polyquaternium-48), and N, N-dimethylaminoethyl methacrylate diethyl sulfate-N, N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (polyquaternium-52) at least one; further preferably, methacryloylethyl trimethyl ammonium salt polymer (polyquaternium-37) and N, N-dimethylaminoethyl methacrylate diethyl sulfate-N, N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (polyquaternium-52) at least one.

[0093] Commercially available polymers may also be used as component (A). Specific examples of commercially available polymers include "Cosmedia Ultragel 300" (polyquaternium-37, cationic charge density: 4.81 mmol / g) produced 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) produced by Kao Corporation.

[0094] (Component (B): anionic polymer)

[0095] Component (B) is a polymer that can interact with component (A) to form a polyion complex. The term "anionic polymer" used herein refers to a polymer having anionic groups and substantially free of cationic groups and amphoteric groups. "Substantially free of cationic groups and amphoteric groups" means that the molar amount of cationic groups and amphoteric groups relative to anionic groups is preferably less than 0.1%.

[0096] As the anionic group contained in component (B), from the viewpoint of easy interaction with component (A) to form a polyion complex and the viewpoint of usability, an acidic group such as a carboxyl group, a sulfonic acid group, a phosphoric acid group is preferred, and a carboxyl group is more preferred. At least a part of the anionic group in component (B) may be neutralized to a salt state.

[0097] From the viewpoint of facilitating the formation of a polyion complex, facilitating the adjustment of the shape of the object to be treated and improving its sustainability, in particular, from the viewpoint of the effect of inhibiting hair spreading and its sustainability, and from the viewpoint of improving the stability of the composition, component (B) preferably comprises a cross-linked polymer comprising a structural unit derived from (meth)acrylic acid and one or more anionic polymers selected from anionic polysaccharides.

[0098] In component (B), examples of the cross-linked polymer containing a structural unit derived from (meth) acrylic acid include a homopolymer or copolymer of (meth) acrylic acid having a cross-linked structure, or a salt thereof. The cross-linked structure referred to herein refers to a three-dimensional network structure in which polymer chains, the main structure of the polymer, are connected within or between polymer chains. The method for forming the cross-linked structure is not particularly limited, and examples thereof include a method of cross-linking while polymerizing by, for example, polycondensation, free radical polymerization, etc., and a method of cross-linking the polymer chains thereafter to form a cross-linked structure.

[0099] Examples of the homopolymer of (meth)acrylic acid include polyacrylic acid, polymethacrylic acid, and salts thereof.

[0100] Examples of copolymers of (meth)acrylic acid include (meth)acrylic acid-maleic acid copolymers, (meth)acrylic acid-itaconic acid copolymers, (meth)acrylic acid-fumaric acid copolymers, (meth)acrylic acid-vinyl acetate copolymers, (meth)acrylic acid-(meth)acrylic acid alkyl ester copolymers, (meth)acrylic acid-2-hydroxyethyl methacrylate copolymers, acrylic acid-alkyl acrylate-(N-alkyl)acrylamide copolymers and salts thereof, and one or more of them may be used.

[0101] Among them, as the copolymer of (meth)acrylic acid, (meth)acrylic acid-(meth)acrylic acid alkyl ester is preferred, and acrylic acid-acrylic acid alkyl ester is more preferred. Examples of (meth)acrylic acid alkyl esters include (meth)acrylic acid alkyl esters having an alkyl group of preferably 1 or more, more preferably 4 or more, and further preferably 8 or more, and preferably 40 or less, more preferably 36 or less, and further preferably 32 or less carbon atoms.

[0102] Specific examples of the crosslinked polymer containing a structural unit derived from (meth)acrylic acid include carboxyvinyl polymer or its salt, (acrylate-alkyl acrylate (C10-30)) crosslinked polymer, (sodium acrylate-acryloyldimethyltaurate-dimethylacrylamide) crosslinked polymer and acrylate crosslinked polymer-4.

[0103] In component (B), examples of anionic polysaccharides include polysaccharides having a carboxyl group (e.g., hyaluronic acid, alginic acid, pectic acid, carboxymethyl cellulose, xanthan gum), polysaccharide sulfates (e.g., carrageenan, keratan sulfate, dermatan sulfate, sulfated starch, heparin, heparan sulfate) and salts thereof, and one or more of them may be used.

[0104] Among them, from the viewpoint of easy formation of polyion complexes, easy adjustment of the shape of the object to be treated and improvement of its sustainability, the anionic polysaccharide is preferably a polysaccharide having a carboxyl group or a salt thereof, more preferably alginic acid, carboxymethyl cellulose or a salt thereof, and further preferably alginic acid or a salt thereof.

[0105] When ingredient (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 alkali metal salts are preferred from the viewpoint of easy availability.

[0106] Among them, from the viewpoint of facilitating the formation of polyion complexes and improving their sustainability, component (B) is preferably one or more selected from carboxyvinyl polymers, (acrylate-alkyl acrylate (C10-30)) cross-linked polymers and anionic polysaccharides, more preferably anionic polysaccharides or their salts, and further preferably alginic acid or its salts.

[0107] The anionic charge density of the component (B) is not particularly limited. From the viewpoint of facilitating interaction with the component (A) to form a polyion complex, from the viewpoint of the effect of the present invention, and from the viewpoint of improving the stability of the composition, the anionic charge density of the component (B) is preferably 1.0 mmol / g or more, more preferably 2.0 mmol / g or more, and further preferably 3.5 mmol / g or more. From the viewpoint of improving the texture of the object to be treated and improving its sustainability, particularly from the viewpoint of inhibiting hair tangling when used for hair treatment and improving its sustainability, the anionic charge density of the component (B) is preferably 25 mmol / g or less, more preferably 20 mmol / g or less, and further preferably 15 mmol / g or less. The anionic charge density of the 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 still more preferably 3.5 mmol / g or more and 15 mmol / g or less.

[0108] The anionic charge density of the component (B) is the number of moles of anionic groups contained in 1 g of the polymer. When at least a part of the anionic groups of the component (B) becomes a neutralized salt, the number of moles of the anionic groups should include the number of moles of the anionic groups in the salt state.

[0109] Two or more polymers may be used as the component (B), in which case the anionic charge density of the component (B) is determined by calculating a weighted average of the anionic charge densities of the respective polymers and the formulated amounts.

[0110] When the component (B) is an anionic polysaccharide, the weight average molecular weight (Mw) of the component (B) is preferably 2,000 or more, more preferably 5,000 or more, further preferably 10,000 or more, still more preferably 30,000 or more, and still more preferably 50,000 or more, from the viewpoint of easily interacting with the component (A) to form a polyion complex, easily adjusting the shape of the object to be treated and improving its sustainability, particularly from the viewpoint of inhibiting the spread of hair and improving its sustainability, and from the viewpoint of improving the stability of the composition. In addition, the weight average molecular weight (Mw) of the component (B) is preferably 3,500,000 or less, more preferably 3,000,000 or less, and further preferably 2,500,000 or less, from the viewpoint of easily interacting with the component (A) to form a polyion complex, easily adjusting the shape of the object to be treated and improving its sustainability, particularly from the viewpoint of inhibiting the spread of hair and improving its sustainability, and from the viewpoint of improving the stability of the composition. The weight average molecular weight (Mw) of the anionic polysaccharide as 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, further preferably 10,000 or more and 3,000,000 or less, still more preferably 30,000 or more and 2,500,000 or less, and still more preferably 50,000 or more and 2,500,000 or less.

[0111] The weight average molecular weight of the component (B) can be measured by gel permeation chromatography (GPC).

[0112] From the viewpoints of improving film-forming property, facilitating interaction with component (A) to form a polyion complex, facilitating adjustment of the shape of the object to be treated and improving its sustainability, in particular, inhibiting the spread of hair and improving its sustainability, and improving the stability of the composition, the content of component (B) in component (B) is preferably 50% by mass or more, more preferably 60% by mass or more, further preferably 70% by mass or more, still more preferably 80% by mass or more, and 100% by mass or less.

[0113] (Component (G): nonionic polymer)

[0114] Composition I preferably further contains (G) a nonionic polymer from the viewpoints of improving film-forming properties, facilitating adjustment of the shape of the treated object and improving its persistence, in particular, improving the effect of suppressing hair spreading and improving its persistence, and improving the stability of the composition. It is presumed that the use of component (G) results in the rigid cross-linked structure of the polyion complex formed by component (A) and component (B) being reinforced by the complex of component (G) having a long chain and flexible non-cross-linked structure.

[0115] As used herein, the term "nonionic polymer" refers to a polymer that is substantially free of cationic groups, anionic groups, and amphoteric groups (which are ionic groups).

[0116] Examples of component (G) include polyalkylene glycol or derivatives thereof, polymers including structural units derived from vinylpyrrolidone, polymers including structural units derived from (meth)acrylates, polyvinyl alcohol, polyacrylamide, and polycaprolactam, and one or more of these may be used.

[0117] Examples of polyalkylene glycols include homopolymers or copolymers of alkylene glycols having an alkylene group having 2 or more and 6 or less, preferably 2 or more and 4 or less, and more preferably 2 or more and 3 or less carbon atoms. Specific examples thereof 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 them, from the viewpoint of improving the effect of the texture of the object to be treated and improving the sustainability of the effect, particularly from the viewpoint of suppressing the effect of hair tangling when used for hair treatment and improving its sustainability, from the viewpoint of improving moisture resistance, and from the viewpoint of usability, preferably one or more selected from polyethylene glycol, polypropylene glycol, and polyethylene glycol-polypropylene glycol copolymer, and more preferably one or more selected from polyethylene glycol and polyethylene glycol-polypropylene glycol copolymer.

[0118] Examples of polyalkylene glycol derivatives include terminal modification 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 monofatty acid esters, polyalkylene glycol difatty acid esters, and polyalkylene glycol diglycidyl ethers. Among them, from the viewpoint of improving the texture of the object to be treated and improving the sustainability of the effect, especially from the viewpoint of inhibiting the tangling of hair when used for hair treatment and improving its sustainability, and from the viewpoint of easy availability, preferably one or more selected from polyalkylene glycol monoalkyl ethers, polyalkylene glycol dialkyl ethers, polyalkylene glycol monofatty acid esters, and polyalkylene glycol difatty acid esters, and more preferably one or more selected from polyalkylene glycol monofatty acid esters and polyalkylene glycol difatty acid esters.

[0119] The number of carbon atoms of the alkyl group in the monoalkyl ether or dialkyl ether of the polyalkylene glycol and the number of carbon atoms of the fatty acid in the monofatty acid ester or difatty acid ester of the polyalkylene glycol are preferably 1 or more and 36 or less, more preferably 4 or more and 32 or less, further preferably 8 or more and 24 or less, and further preferably 12 or more and 22 or less. Furthermore, the number of carbon atoms of the aryl group in the monoaryl ether or diaryl ether of the polyalkylene glycol is preferably 6 or more and 36 or less, more preferably 6 or more and 32 or less, further preferably 6 or more and 24 or less, and still further preferably 6 or more and 22 or less.

[0120] Specific examples of the 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 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 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 monooctyl ether, polyethylene glycol monodecyl ether, polyethylene glycol monodecyl ether, polyethylene glycol monododecyl ether, polyethylene glycol monotridecyl ether, polyethylene glycol mono ... 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-monooctyl 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, polyethylene glycol-polypropylene glycol-diglycidyl ether, etc., and one or two or more of these can be used.

[0121] Examples of polymers containing structural units derived from vinyl pyrrolidone include homopolymers of vinyl pyrrolidone or copolymers of vinyl pyrrolidone and nonionic monomers. Specific examples thereof include polyvinyl pyrrolidone, vinyl pyrrolidone-vinyl acetate copolymers, and vinyl pyrrolidone-methacrylamide-vinylimidazole copolymers.

[0122] Examples of polymers containing structural units derived from (meth)acrylates include homopolymers of (meth)acrylates, and copolymers of (meth)acrylates and nonionic monomers such as (meth)acrylamide, dimethylacrylamide, vinyl acetate, and vinyl methyl ether. Examples of (meth)acrylates include hydroxyalkyl (meth)acrylates, alkyl (meth)acrylates, in addition to the above-mentioned alkyl (meth)acrylates.

[0123] Specific examples of the polymer containing a structural unit derived from a (meth)acrylic acid ester include a (dimethylacrylamide-hydroxyethyl acrylate-methoxyethyl acrylate) copolymer and a (hydroxyethyl acrylate-methoxyethyl acrylate) copolymer.

[0124] Among them, from the viewpoints of improving film-forming property, facilitating adjustment of the shape of the treated object and improving its sustainability, in particular, the effect of inhibiting hair spreading and improving its sustainability, improving the stability of the composition, and being easy to obtain, component (G) is preferably one or more selected from polyalkylene glycols or derivatives thereof and polymers containing a structural unit derived from vinyl pyrrolidone, more preferably one or more selected from polyethylene glycol, polypropylene glycol, polyethylene glycol-polypropylene glycol copolymers, mono- or di-fatty acid esters thereof, and polyvinyl pyrrolidone, and further preferably one or more selected from polyethylene glycol, polyethylene glycol-polypropylene glycol copolymers, mono- or di-fatty acid esters thereof, and polyvinyl pyrrolidone.

[0125] From the viewpoint of improving the stability of the composition and the viewpoint of usability, the weight average molecular weight (Mw) of component (G) is preferably 2,000 or more, more preferably 5,000 or more, and further preferably 10,000 or more, and is preferably 2,000,000 or less, and 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, and further preferably 10,000 or more and 1,500,000 or less.

[0126] The weight average molecular weight of the component (G) can be measured by gel permeation chromatography (GPC).

[0127] Furthermore, from the viewpoint of facilitating adjustment of the shape of the object to be treated and improving the durability thereof, in particular, from the viewpoint of maintaining efficacy such as the effect of inhibiting hair spread and improving the durability thereof, Composition I does not substantially contain ionic surfactants such as anionic surfactants, cationic surfactants and amphoteric surfactants.

[0128] In the present specification, the term "substantially free of" means that the content of the ionic surfactant in the composition I is preferably 5 mass % or less, more preferably 1 mass % or less, further preferably 0.5 mass % or less, and more preferably 0.1 mass % or less.

[0129] (Component (H): acid)

[0130] From the viewpoint of stably forming a polyion complex, the composition I preferably further contains (H) an acid.

[0131] As component (H), an organic acid or an inorganic acid can be used, and an organic acid is preferred from the viewpoint of use in a cosmetic composition. Examples of organic acids include carboxylic acid compounds and sulfonic acid compounds other than component (B), preferably compounds having a molecular weight of 500 or less, more preferably 200 or less.

[0132] Examples of carboxylic acid compounds include: aliphatic monocarboxylic acids having a carbon number of 4 or less, such as acetic acid, propionic acid, butyric 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, citric acid; and acidic amino acids, such as glutamic acid and aspartic acid, one or more of which can be used.

[0133] Examples of the sulfonic acid compound 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 may be used.

[0134] From the viewpoint of stably forming a polyion complex to form a highly stable cosmetic composition and from the viewpoint of using it in a cosmetic composition, the organic acid is preferably one or more selected from aliphatic dicarboxylic acids, hydroxycarboxylic acids and aromatic sulfonic acids, more preferably one or more selected from succinic acid, lactic acid, malic acid, glycolic acid, p-toluenesulfonic acid and naphthalenesulfonic acid, further preferably one or more selected from succinic acid and lactic acid, more preferably lactic acid.

[0135] In the formulation, at least a portion of the organic acid may be in the state of an organic acid salt. From the viewpoint of use in cosmetic compositions and the like and easy availability, the organic acid salt is preferably an alkali metal salt or an alkali metal salt of the organic acid, more preferably an alkali metal salt, further preferably one or more selected from a sodium salt and a potassium salt, and still more preferably a sodium salt.

[0136] From the viewpoint of facilitating the formation of polyion complexes and improving the stability of the composition, 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, further preferably 5% by mass or less, and may be 0% by mass. The proportion (mass %) of the organic acid salt herein refers to the mass % converted into the organic acid.

[0137] (water)

[0138] From the viewpoint of forming an emulsified composition, the composition I preferably contains water. The water used in the composition I is preferably deionized water or distilled water. As long as the stability of the composition is not impaired, tap water, groundwater, etc. sterilized with hypochlorous acid or the like can be used.

[0139] (Other ingredients)

[0140] Composition I may contain the following optional ingredients: organic acid or inorganic acid, anionic surfactant, nonionic surfactant, amphoteric surfactant, aromatic alcohol such as phenoxyethanol, non-aromatic polyol such as dipropylene glycol, oils other than components (C), (D) and (F), antioxidants, antidandruff agents, vitamins, bactericides, anti-inflammatory agents, preservatives, chelating agents, moisturizers, pearls, ceramides, fragrances, plant extracts, ultraviolet (UV) absorbers and pH adjusters.

[0141] (pH)

[0142] From the viewpoint of composition stability, the pH of composition I, measured as the pH of an aqueous solution obtained by diluting composition I 20 times with water at 25°C, is preferably 1.0 or more, more preferably 3.0 or more, preferably 7.5 or less, more preferably 7.0 or less, further preferably 6.0 or less, and still more preferably 5.0 or less.

[0143] The pH can be measured using a pH meter.

[0144] (content)

[0145] From the perspectives of facilitating the formation of a polyion complex, facilitating the adjustment of the shape of the object to be treated and improving its sustainability, in particular, inhibiting the spread of hair and improving its sustainability, as well as improving the stability of the composition, the content or blending amount of each component in Composition I is preferably as follows.

[0146] From the viewpoint of facilitating the formation of a polyion complex and the viewpoint of the effect 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, further 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. In addition, from the viewpoint of improving the stability of the composition, the content of component (A) in composition I is preferably 3.0% by mass or less, more preferably 2.5% by mass or less, further preferably 2.0% by mass or less, still more preferably 1.5% by mass or less, and still more preferably 0.5% by mass or less. The content of component (A) in composition I is preferably 0.01 mass% or more and 3.0 mass% or less, more preferably 0.02 mass% or more and 2.5 mass% or less, further preferably 0.05 mass% or more and 2.0 mass% or less, still more preferably 0.1 mass% or more and 1.5 mass% or less, still more preferably 0.2 mass% or more and 1.5 mass% or less, still more preferably 0.2 mass% or more and 0.5 mass% or less.

[0147] From the viewpoint of facilitating the formation of a polyion complex, improving film-forming properties, and improving the stability of the composition, 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 further preferably 0.02% by mass or more. In addition, from the viewpoint of improving the stability of the composition, the content of component (B) in composition I is preferably 3.0% by mass or less, more preferably 2.0% by mass or less, further 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 composition I is preferably 0.005 mass% or more and 3.0 mass% or less, more preferably 0.01 mass% or more and 2.0 mass% or less, further preferably 0.02 mass% or more and 1.5 mass% or less, still more preferably 0.02 mass% or more and 1.0 mass% or less, still more preferably 0.02 mass% or more and 0.5 mass% or less, still more preferably 0.02 mass% or more and 0.3 mass% or less, still more preferably 0.02 mass% or more and 0.2 mass% or less, still more preferably 0.02 mass% or more and 0.1 mass% or less, and still more preferably 0.02 mass% or more and 0.08 mass% or less.

[0148] From the viewpoint of facilitating adjustment of the shape of the object to be treated and improving the sustainability thereof, in particular from the viewpoint of the effect of inhibiting the spread of hair and improving the sustainability thereof, 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, further preferably 0.03% by mass or more, still more preferably 0.04% by mass or more, further 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. Furthermore, from the viewpoint of improving the stability of the composition, the total content of component (A) and component (B) in composition I is preferably 6.0% by mass or less, more preferably 5.0% by mass or less, further 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 composition I is preferably 0.015 mass% or more and 6.0 mass% or less, more preferably 0.02 mass% or more and 5.0 mass% or less, further preferably 0.03 mass% or more and 4.5 mass% or less, still more preferably 0.04 mass% or more and 4.0 mass% or less, still more preferably 0.05 mass% or more and 3.8 mass% or less, still more preferably 0.07 mass% or more and 3.5 mass% or less, still more preferably 0.07 mass% or more and 3.5 mass% or less. 5 mass% or less, still more preferably 0.1 mass% or more and 3.0 mass% or less, still more preferably 0.12 mass% or more and 2.5 mass% or less, still more preferably 0.22 mass% or more and 2.0 mass% or less, still more preferably 0.22 mass% or more and 0.8 mass% or less, still more preferably 0.22 mass% or more and 0.7 mass% or less, still more preferably 0.22 mass% or more and 0.6 mass% or less, and still more preferably 0.22 mass% or more and 0.58 mass% or less.

[0149] From the viewpoint of facilitating the formation of a polyion complex and the effect of the present invention, the ratio of the content of component (A) to component (B) contained in composition I, that is, the mass ratio of component (A) to component (B) [(A) / (B)] is preferably 1.0 or more, more preferably 2.0 or more, further preferably 3.0 or more, still more preferably 4.0 or more, still 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, further preferably 12 or less, and still 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, further preferably 3.0 or more and 12 or less, still more preferably 4.0 or more and 12 or less, and still more preferably 5.0 or more and 10 or less.

[0150] In the composition of the present invention, the mass ratio of component (A) to component (B) plays a more important role in the effect of the present invention than the ratio of the cationic charge to the anionic charge of components (A) and (B).

[0151] From the viewpoint of facilitating the formation of polyion complexes and the interaction with the membrane formed by composition II, the ratio of the molar number of cationic charge of component (A) in composition I to the molar number of anionic charge of component (B) is preferably from 10 / 90 to 95 / 5, more preferably from 20 / 80 to 95 / 5, and further preferably from 25 / 75 to 90 / 10.

[0152] When the composition I contains the (G) nonionic polymer, the content of the component (G) in the composition I is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, further 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 adjustment of the shape of the object to be treated and improving its sustainability, in particular, from the viewpoint of the effect of suppressing the spread of hair and improving its sustainability, and from the viewpoint of appropriately exerting the improvement of the stability of the composition. In addition, from the viewpoint of improving the stability of the composition, the content of the component (G) in the composition I is preferably 3.0% by mass or less, more preferably 2.5% by mass or less, further 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 composition I is preferably 0.01 mass% or more and 3.0 mass% or less, more preferably 0.02 mass% or more and 2.5 mass% or less, further preferably 0.05 mass% or more and 2.0 mass% or less, still more preferably 0.1 mass% or more and 1.5 mass% or less, still more preferably 0.1 mass% or more and 1.0 mass% or less, and still more preferably 0.2 mass% or more and 0.6 mass% or less.

[0153] When the composition I contains (H) acid, from the viewpoint of facilitating the formation of a polyion complex, the content of the component (H) in the composition I is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, further 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. In addition, from the viewpoint of facilitating the formation of a polyion complex and from the viewpoint of improving the stability of the composition, the content of the component (H) in the composition I is preferably 5.0% by mass or less, more preferably 3.0% by mass or less, further preferably 2.5% by mass or less, and further preferably 0.5% by mass or less. 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, further 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, still 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.

[0154] When the organic acid is prepared in the form of an organic acid salt, the above content is the amount converted into the organic acid.

[0155] When composition I contains water, from the viewpoint of being easy to form polyion complexes and improving the stability of the composition, the water content of composition I is preferably 10% by mass or more, more preferably 20% by mass or more, and further preferably 30% by mass or more. In addition, from the viewpoint of improving the stability of the composition and the viewpoint of the degree of freedom of formulation, the water content of composition I is preferably 99% by mass or less, more preferably 95% by mass or less, and still more preferably 90% by mass or less. The water content in 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 further preferably 30% by mass or more and 90% by mass or less. The water content in the composition can be the remainder of component (A) and component (B), and optionally contained components (G) and component (H).

[0156] (Viscosity)

[0157] From the viewpoint of easy formation of polyion complex, easy adjustment of the shape of the object to be treated and improvement of its sustainability, in particular, from the viewpoint of the effect of inhibiting hair spreading and improving its sustainability, and from the viewpoint of improving the stability of the composition, the viscosity of the 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. From the viewpoint of easy formation of polyion complex and easy handling, the viscosity of the composition I is preferably 10,000 mPa-s or less, more preferably 5,000 mPa-s or less, and further preferably 1,500 mPa-s or less. The viscosity of the 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 further preferably 10 mPa-s or more and 1,500 mPa-s or less.

[0158] The viscosity of the composition I at 30° C. can be measured by the method specifically described in the examples.

[0159] (Preparation method of composition I)

[0160] The preparation method of composition I is not particularly limited, and the composition I can be prepared by dissolving or dispersing the components in water. Composition I is preferably prepared by a method having the following steps M1 to M3 in order from the viewpoints of facilitating adjustment of the shape of the object to be treated and improving its sustainability, particularly from the viewpoints of inhibiting the spread of hair and improving its sustainability, and from the viewpoint of being able to prepare a more stable composition.

[0161] Step M1: a step of dissolving or dispersing the (B) anionic polymer in water to prepare a solution 1 containing the (B) anionic polymer.

[0162] Step M2: a step of mixing solution 1 with (H) acid or an aqueous solution thereof to prepare mixture 2 containing (B) anionic polymer, (B) acid and water.

[0163] Step M3: A step of mixing the mixture 2 with a solution obtained by dissolving or dispersing the (A) cationic polymer in water to prepare a mixture 3 containing the (A) cationic polymer, the (B) anionic polymer, the (H) acid and water.

[0164] (Apply to hair)

[0165] When step 1 is performed first and then step 2 is performed, composition I is directly applied to the hair. In this case, the film formed by composition I has good adhesion to the hair as a base coat.

[0166] When step 1 is performed after step 2, composition I is applied to the hair to which composition II is first applied. In this case, the film formed by composition I tends to achieve excellent texture as a top coat regardless of the hair diameter and degree of damage.

[0167] The method of applying composition I to hair may be any method as long as composition I can come into contact with 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.

[0168] From the viewpoint of facilitating adjustment of the shape of the object to be treated and improving its sustainability, in particular, from the viewpoint of balancing the effect of suppressing hair spreading and improving its sustainability and economic benefits, the amount of the composition I applied to the hair, based on the dry mass of hair: the mass of the composition I, is preferably 1:0.01 to 1:5, more preferably 1:0.05 to 1:1, still more preferably 1:0.1 to 1:0.5.

[0169] {Step 2}

[0170] Step 2: A step of applying composition II comprising the following components (C) and (D) to the hair.

[0171] Composition II is a cosmetic composition applied directly to hair. Specific product forms thereof include shampoo, hair lotion, conditioner, hair treatment agent (including leave-in type), hair setting agent, hair dye and permanent care product. Among them, hair treatment agent or hair setting agent is preferred from the viewpoint of effectiveness of the effect of the present invention.

[0172] The form of composition II is preferably an emulsified composition, and more preferably a water-in-oil emulsified composition from the viewpoint of enhancing the stability of the composition and improving the feeling during use.

[0173] Hereinafter, each component contained in Composition II will be described.

[0174] (Component (C): modified silicone)

[0175] Component (C) is one or more modified silicones selected from polyglycerol-modified silicone and amino-modified silicone. Component (C) contained in composition II is estimated to have the effect of interacting with the base coat, improving the texture, and the effect of effect duration, especially the effect of improving the hair quality. In addition, since component (B) and component (C) can form hydrogen bonds, it is estimated that a strong network can be formed.

[0176] Polyglycerol modified silicone

[0177] Polyglycerol-modified silicone is a silicone having a polyglycerol chain in the molecule. The position where the polyglycerol chain is introduced is optional, and the introduction form can be any one of a single-end type, a double-end type, and a side chain type, and the silicone preferably has a polyglycerol chain at a side chain or a silicone chain end, and more preferably has a monovalent polyglycerol group at a side chain or a silicone chain end.

[0178] Specific examples of the polyglyceryl-modified silicone include polyglyceryl-3-polydimethylsiloxyethyl dimethicone, polyglyceryl-3-disiloxane dimethicone, lauryl polyglyceryl-3-polydimethylsiloxyethyl dimethicone, cetyl diglyceryl tri(trimethylsiloxy)silylethyl dimethicone, and bis(polyglyceryl-3-oxyphenylpropyl) dimethicone.

[0179] Examples of commercially available products of polyglycerol-modified silicone include: "KF-6100", "KF-6104", "KF6106", "KF-6105" manufactured by Shin-Etsu Chemical Co., Ltd.; "DOWSI ES-5600 Silicone Glycerin Emulsifier" manufactured by Toray Dow Co., Ltd.; and "SOFCARE GS-G" manufactured by Kao Corporation.

[0180] Amino modified silicone

[0181] Examples of the amino-modified silicone include silicones having an amino- or ammonium-containing group in the main chain or side chain and having no polyether structure, such as dimethylpolysiloxane (dimethicone) and methylphenylpolysiloxane, preferably silicones represented by the following general formula (2).

[0182]

[0183] Among them, R 11 Each independently represents a methyl group or a phenyl group, R 12Each independently represents an alkyl group having 1 to 30 carbon atoms, a hydroxyl group, or R 13 ; R 13 Indicated by -R 14 -Z 1 The monovalent group (R 14 represents a single bond or a divalent hydrocarbon group having 1 to 20 carbon atoms, Z 1 represents a primary to tertiary amino group-containing group or an ammonium group-containing group); and a is a number of 0 to 3000 both inclusive, b is a number of 1 to 3000 both inclusive, and a+b is a number of 3,000 to 20,000 both inclusive.

[0184] In the general formula (2), R 11 Preferably, methyl, R 12 Preferably methyl or R 13 .

[0185] R 15 For-R 14 -Z 1 The monovalent group shown, R 14 It is preferably a divalent hydrocarbon group having 1 to 20 carbon atoms, more preferably an olefin group having 1 to 20 carbon atoms, more preferably a straight-chain or branched olefin group having 1 to 6 carbon atoms, still more preferably a methylene group, an ethylene group, a trimethylene group, a propylene group, a tetramethylene group or a hexamethylene group, still more preferably a trimethylene group or a propylene group.

[0186] Z 1 is a group containing a primary or tertiary amino group or a group containing an ammonium group, preferably -N(R 15 )2.-NR 15 (CH2) c N(R 16 )2 or -NR 15 (CH2) c N(R 16 )CO-R 17 The amino group shown, or -N + (R 15 )3A- and -NR 15 (CH2) c N + (R 16 )3A- containing an ammonium group. 15 and R 16 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. 17represents an alkyl group having a carbon number of 1 to 3. A is a counter anion and represents Cl, Br or I. c represents a number of 1 to 6, preferably a number of 2 to 4.

[0187] In the general formula (2), R 13 Preferred are -(CH2)3-NH2, -(CH2)3-N(CH3)2, -(CH2)3-NH-(CH2)2-NH2 or -(CH2)2-NH-(CH2)2-N(CH3)2, more preferably -(CH2)3-NH2 or -(CH2)3-NH-(CH2)2-NH2.

[0188] Preferred silicones represented by the general formula (2) include at least one selected from aminoethylaminopropyl dimethicone [amodimethicone], aminopropyl dimethicone, bis(aminopropyl) dimethicone and bis(cetearyl) amodimethicone.

[0189] Examples of commercially available products of amino-modified silicone include "Silicone SF 8457C" and "DOWSIL 2-8566 AMINO FLUID" manufactured by Dow Toray Co., Ltd. In addition, "DOWSIL CF 1046" manufactured by Dow Toray Co., Ltd., which is a mixture of amino-modified silicone and (D) dimethyl polysiloxane to be described later, can be used.

[0190] Component (C) may be used alone or in combination of two or more thereof. Among them, amino-modified silicone is preferred from the viewpoints of interaction with the primer layer, effect of improving texture and duration of effect, and providing a smooth and moist feeling to the object to be treated.

[0191] (ingredient (D): dimethyl polysiloxane)

[0192] Component (D) is dimethyl polysiloxane. Component (C) and component (D) in composition II are considered to achieve the effects of improving texture and effect duration, and exhibit a light and natural effect on the treated object.

[0193] The dimethyl polysiloxane used as the component (D) preferably has low volatility. From this viewpoint, the viscosity at 25° C. is preferably 500 mm 2 / s or more, more preferably 700mm 2 / s or more, more preferably 1,000 mm 2 / s or more.

[0194] From the viewpoint of providing a light and natural effect to the object to be treated, the component (D) more preferably contains (D1) dimethyl polysiloxane having a molecular weight of 1,000 mm at 25° C. 2 / s or more and 10,000mm 2 / s or less, and (D2) dimethyl polysiloxane having a viscosity of 300,000 mm at 25°C 2 / s or more and 5,000,000mm 2 / s or less viscosity.

[0195] The viscosity of the component (D) is a value measured at 25° C. in accordance with the “liquid viscosity measurement method” specified in JIS Z8803:2011 or ASTM D 445-46T, and can be measured using, for example, an Ubbelohde viscometer.

[0196] 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, and further preferably 2.0 or more, and is preferably 20 or less, more preferably 10 or less, and further preferably 5.0 or less, from the perspective of the effect of improving the texture and the effect of maintaining the 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, and further preferably 2.0 or more and 5.0 or less.

[0197] When component (D) contains component (D1) and component (D2), from the perspective of providing a light and natural effect on the object to be treated, the total content of component (D1) and component (D2) in component (D) is preferably 50% by mass or more, more preferably 60% by mass or more, further preferably 70% by mass or more, still more preferably 80% by mass or more, and still more preferably 90% by mass or more, and 100% by mass or less.

[0198] (Ingredient (E): cationic surfactant)

[0199] From the viewpoint of appropriately exerting the effect of improving the texture and the effect of maintaining the texture, the composition II preferably further contains (E) a cationic surfactant.

[0200] Examples of the cationic surfactant include (i) alkyltrimethylammonium salts, (ii) alkoxyalkyltrimethylammonium salts, (iii) dialkyldimethylammonium salts, (iv) alkylamidealkyltrimethylammonium salts, (v) alkyldimethylamines and salts thereof, (vi) alkoxyalkyldimethylamines and salts thereof, and (vii) alkylamidealkyldimethylamines and salts thereof.

[0201] (I) Examples of the alkyltrimethylammonium salts include alkyltrimethylammonium salts having an alkyl group of preferably 12 or more and 24 or less carbon atoms, more preferably 16 or more and 24 or less carbon atoms, and specific examples thereof include cetrimonium chloride, stearyltrimethylammonium chloride, and behentrimonium chloride.

[0202] (ii) Examples of the alkoxyalkyltrimethylammonium salts include alkoxyalkyltrimethylammonium salts having an alkoxy group of preferably 12 or more and 22 or less carbon atoms, more preferably 16 or more and 20 or less carbon atoms, and specific examples thereof include stearoxypropyltrimethylammonium chloride, stearoxyethyltrimethylammonium chloride and stearoxyhydroxypropyltrimethylammonium chloride.

[0203] (iii) Examples of the dialkyldimethylammonium salts include dialkyldimethylammonium salts having preferably 12 or more and 22 or less carbon atoms, more preferably 16 or more and 20 or less carbon atoms, and specific examples thereof include distearyldimethylammonium chloride.

[0204] (iv) Examples of the alkylamidealkyltrimethylammonium salts include alkylamidealkyltrimethylammonium salts having an alkyl group of preferably 11 or more and 21 or less carbon atoms, more preferably 13 or more and 19 or less carbon atoms, and specific examples thereof include palmitamidepropyltrimethylammonium chloride.

[0205] (v) Alkyldimethylamine, (vi) alkoxyalkyldimethylamine and (vii) alkylamidealkyldimethylamine react with an acid to form a tertiary amine salt and become a cationic surfactant.

[0206] The alkyl group in (v) alkyldimethylamine and salts thereof and (vi) alkoxyalkyldimethylamine and salts thereof is an alkyl group having preferably 12 or more and 22 or less carbon atoms, more preferably 16 or more and 20 or less carbon atoms.

[0207] (vii) Alkylamide The alkyl group in the alkyldimethylamine and the salt thereof is an alkyl group having preferably 11 or more and 21 or less carbon atoms, more preferably 15 or more and 19 or less carbon atoms.

[0208] The amines of (v) to (vii) may be reacted with an acid in advance to prepare the salt in the composition II, or may be prepared as the amine in the composition II and the acid may be further prepared in the composition II to form the salt in the composition. Therefore, the amine and its salt are defined as cationic surfactants herein. In addition, the content or preparation amount is calculated according to the mass of the amine.

[0209] Examples of amine salts of (v) to (vii) include salts formed with organic acids 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; acidic amino acids such as glutamic acid and aspartic acid. Examples of inorganic acids include hydrochloric acid, sulfuric acid and phosphoric acid. Among them, organic acids are preferred, and more preferably one or more selected from dicarboxylic acids, hydroxycarboxylic acids and acidic amino acids. Dicarboxylic acids are more preferably selected from one or more selected from maleic acid and succinic acid. Hydroxycarboxylic acids are more preferably selected from one or more selected from glycolic acid, lactic acid and malic acid. Acidic amino acids are more preferably glutamic acid.

[0210] (v) Examples of alkyldimethylamines and salts thereof include N,N-dimethylbehenylamine, N,N-dimethylstearylamine, and organic acid salts thereof, preferably lactic acid salt of N,N-dimethylbehenylamine, glycolic acid salt of N,N-dimethylstearylamine, and the like.

[0211] (vi) Examples of alkoxyalkyldimethylamines and salts thereof include N,N-dimethyl-3-hexadecyloxypropylamine, N,N-dimethyl-3-octadecyloxypropylamine and organic acid salts thereof, preferably N,N-dimethyl-3-hexadecyloxypropylamine or its lactate and N,N-dimethyl-3-octadecyloxypropylamine (stearyloxypropyldimethylamine) or its lactate.

[0212] (vii) Examples of the alkylamide alkyldimethylamines and salts thereof include N-[3-(dimethylamino)propyl]behenamide, N-[3-(dimethylamino)propyl]stearamide and organic acid salts thereof, preferably N-[3-(dimethylamino)propyl]behenamide lactate and N-[3-(dimethylamino)propyl]stearamide glycolate.

[0213] Component (E) may be used alone or in combination of two or more.

[0214] Among them, from the viewpoint of improving the stability of the composition, component (E) is preferably one or more selected from (i) alkyltrimethylammonium salts, (ii) alkoxyalkyltrimethylammonium salts, (iii) dialkyldimethylammonium salts, (iv) alkylamidealkyltrimethylammonium salts, (v) alkyldimethylamines and their salts, (vi) alkoxyalkyldimethylamines and their salts, and (vii) alkylamidealkyldimethylamines and their salts; more preferably one or more selected from (i) alkyltrimethylammonium salts and (vi) alkoxyalkyldimethylamines and their salts; more preferably one or more selected from cetyltrimethylammonium chloride, octadecyltrimethylammonium chloride, behenyltrimethylammonium chloride, N,N-dimethyl-3-hexadecyloxypropylamine or its lactate, N,N-dimethyl-3-octadecyloxypropylamine (stearyloxypropyldimethylamine) or its lactate; still more preferably one or more selected from behenyltrimethylammonium chloride and N,N-dimethyl-3-octadecyloxypropylamine (stearyloxypropyldimethylamine) or its lactate.

[0215] (Component (F): higher alcohol)

[0216] From the viewpoint of improving the stability of the composition, the composition II preferably further contains (F) a higher alcohol.

[0217] Examples of higher alcohols include aliphatic monohydric alcohols having 12 or more carbon atoms, preferably 12 or more and 22 or less carbon atoms. Examples of higher alcohols include one or more selected from lauryl alcohol, cetyl alcohol, myristyl alcohol, oleyl alcohol, stearyl alcohol, isostearyl alcohol, 2-octyldodecanol, behenyl alcohol, and cetearyl alcohol.

[0218] Among them, from the viewpoint of further improving the feel of the object to be treated, the higher alcohol is preferably one or more selected from cetyl alcohol, myristyl alcohol, stearyl alcohol and behenyl alcohol.

[0219] (water)

[0220] From the viewpoint of forming an emulsified composition, the composition II preferably contains water. The water used in the composition II is preferably deionized water or distilled water. As long as the stability of the composition is not impaired, tap water, groundwater, etc. sterilized with hypochlorous acid, etc. can be used.

[0221] (Other ingredients)

[0222] Composition II may contain the following optional ingredients: organic acid or inorganic acid, anionic surfactant, nonionic surfactant, amphoteric surfactant, aromatic alcohol such as phenoxyethanol, non-aromatic polyol such as dipropylene glycol, oils other than components (C), (D) and (F), antioxidants, antidandruff agents, vitamins, bactericides, anti-inflammatory agents, preservatives, chelating agents, moisturizers, pearls, ceramides, fragrances, plant extracts, ultraviolet absorbers and pH adjusters.

[0223] (pH)

[0224] From the viewpoint of adsorption to hair and composition stability, the pH of the composition II is preferably 3.0 or higher, more preferably 3.2 or higher, based on the pH of an aqueous solution of the composition II diluted 20 times with water at 25°C. Furthermore, from the viewpoint of improving the stability of the composition, the pH is preferably 7.5 or lower, more preferably 7.0 or lower, further preferably 6.0 or lower, and still more preferably 5.0 or lower.

[0225] pH can be measured using a pH meter.

[0226] (Viscosity)

[0227] From the viewpoint of easy formation of polyion complex, easy adjustment of the shape of the object to be treated and improvement of its sustainability, in particular, from the viewpoint of the effect of inhibiting hair spreading and improving its sustainability, and from the viewpoint of 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 viewpoint of easy formation of polyion complex and easy handling, the viscosity of composition II is preferably 200,000 mPa-s or less, more preferably 150,000 mPa-s or less, and further preferably 120,000 mPa-s or less. The viscosity of composition I 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 further preferably 60,000 mPa-s or more and 120,000 mPa-s or less.

[0228] The viscosity of Composition II at 30° C. can be measured by the method specifically described in the Examples.

[0229] (content)

[0230] From the perspective of improving the effect of texture and achieving the persistence of the effect, and providing a smooth and moist feeling to the object to be treated, the content of component (C) in composition II is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, further preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and still more preferably 0.5% by mass or more. In addition, from the perspective of improving the stability of the composition, the content of component (C) in composition II is preferably 5.0% by mass or less, more preferably 3.0% by mass or less, further preferably 2.0% by mass or less, and still more preferably 1.0% by mass or less. The content of component (C) in composition II 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, further preferably 0.05% by mass or more and 2.0% by mass or less, still more preferably 0.1% by mass or more and 1.0% by mass or less, and still more preferably 0.5% by mass or more and 1.0% by mass or less.

[0231] From the effect of improving texture and the persistence of achieving effect, as well as providing light and natural viewpoints for the object to be treated, the content of component (D) in composition II is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, further preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, and still more preferably 1.0% by mass or more. In addition, from the viewpoint of improving composition stability, the content of component (D) in composition II is preferably 15% by mass or less, more preferably 10% by mass or less, further preferably 8.0% by mass or less, still more preferably 5.0% by mass or less, and still 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, further preferably 0.3% by mass or more and 8.0% by mass or less, still 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 4.0% by mass or less.

[0232] From the viewpoint of improving the effect of texture and the sustainability of the effect, the total content of component (C) and component (D) in composition II is preferably 0.06% by mass or more, more preferably 0.1% by mass or more, further preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, still more preferably 0.6% by mass or more, and still more preferably 1.0% by mass or more. In addition, from the viewpoint of improving the stability of the composition, the total content of component (C) and component (D) in composition II is preferably 20% by mass or less, more preferably 15% by mass or less, further preferably 10% by mass or less, still more preferably 6.0% by mass or less, and still more preferably 5.0% by mass or less. The total content of component (C) and component (D) in composition II is preferably 0.06 mass% or more and 20 mass% or less, more preferably 0.1 mass% or more and 15 mass% or less, further preferably 0.3 mass% or more and 10 mass% or less, still more preferably 0.5 mass% or more and 10 mass% or less, still more preferably 0.6 mass% or more and 6.0 mass% or less, and still more preferably 1.0 mass% or more and 5.0 mass% or less.

[0233] From the viewpoint of the effect of improving the texture and the sustainability of the effect, the ratio of the content of component (C) to component (D) in composition II, the mass ratio of component (C) to component (D) [(C) / (D)] is preferably 0.02 or more, more preferably 0.05 or more, further preferably 0.1 or more, further preferably 0.2 or more, and preferably 20 or less, more preferably 10 or less, further 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, 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, further 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.

[0234] When composition II contains component (E), from the viewpoint of composition stability, the content of component (E) in composition II is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, further preferably 0.5% by mass or more, and further preferably 2.0% by mass or more. In addition, from the viewpoint of improving composition stability, the content of component (E) in composition II is preferably 10% by mass or less, more preferably 5.0% by mass or less, further preferably 3.5% by mass or less, and further preferably 3.0% by mass or less. The content of component (E) in 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, further preferably 0.5% by mass or more and 3.5% by mass or less, and still more preferably 2.0% by mass or more and 3.0% by mass or less.

[0235] When composition II contains component (F), from the viewpoint of composition stability, the content of component (F) in composition II is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, further preferably 0.5% by mass or more, still more preferably 1.0% by mass or more, and still more preferably 5.0% by mass or more. In addition, from the viewpoint of improving the stability of the composition, the content of component (F) in composition II is preferably 15% by mass or less, more preferably 12% by mass or less, and further preferably 10% by mass or less. The content of component (F) in 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, further 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 still more preferably 5.0% by mass or more and 10% by mass or less.

[0236] When composition II contains water, from the viewpoint of improving composition stability, the water content of composition II is preferably 10% by mass or more, more preferably 20% by mass or more, and further preferably 30% by mass or more. In addition, from the viewpoint of improving composition stability and the viewpoint of formulation freedom, the water content of composition II is preferably 99% by mass or less, more preferably 95% by mass or less, and still more preferably 90% by mass or less. The water content of 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 further preferably 30% by mass or more and 90% by mass or less. The water content in the composition can be the remainder of component (C) and component (D), and optionally included component (E) and component (F).

[0237] (Preparation method of composition II)

[0238] The preparation method of composition II is not particularly limited, and the composition II can be prepared by dissolving or dispersing the components in water. Composition I is preferably prepared by a method having the following steps M4 to M5 in order from the viewpoints of easy adjustment of the shape of the object to be treated and improved sustainability, particularly from the viewpoint of the effect of inhibiting hair spread and improving sustainability, and from the viewpoint of being able to prepare a more stable composition.

[0239] Step M4: a step of mixing an aqueous phase (4-1) containing water with an oil phase (4-2) containing (D) a cationic surfactant and (E) a higher alcohol to prepare an emulsion (4)

[0240] Step M5: A step of mixing the emulsion (4) with an oil phase (5) containing (C) one or more modified silicones selected from polyglycerol-modified silicone and amino-modified silicone and (D) dimethyl polysiloxane

[0241] (Apply to hair)

[0242] When step 1 is performed first and then step 2 is performed, composition I is directly applied to the hair. In this case, the film formed by composition I has good adhesion to the hair as a base coat.

[0243] When step 1 is performed after step 2, composition I is applied to the hair to which composition II has been first applied. In this case, the film formed by composition I tends to achieve excellent texture as a top coat regardless of the hair diameter and degree of damage.

[0244] The method of applying composition II to hair may be any method as long as composition II can come into contact with hair, and examples thereof include a method of applying the composition to hair and a method of immersing hair in the composition in a dry state or a wet state.

[0245] From the viewpoint of the balance of the effect of improving the texture, the duration of the effect and the economic benefit, the amount of the composition II applied to the hair is preferably 1:0.01 to 1:5, more preferably 1:0.05 to 1:1, and further preferably 1:0.1 to 1:0.5, based on the dry mass of the hair: the mass of the composition II.

[0246] From the viewpoint of improving the lightness and moisture of the 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, calculated as the mass of composition I:the mass of composition II, is preferably from 5:1 to 1:5, more preferably from 3:1 to 1:3.

[0247] For the above-mentioned embodiments, the present invention further discloses the following contents.

[0248] <1>

[0249] A hair treatment method, wherein the hair treatment method comprises: the following steps 1 and 2 performed in any order, and does not include: rinsing the hair with water between steps 1 and 2:

[0250] Step 1: A step of applying a composition I comprising the following ingredients (A) and (B) to the hair:

[0251] Component (A): a cationic polymer having a viscosity of 1,000 mPa-s or more in a 1 mass % aqueous solution at 30°C;

[0252] Component (B): anionic polymer; and

[0253] Step 2: A step of applying composition II comprising the following ingredients (C) and (D) to the hair:

[0254] Component (C): one or more modified silicones selected from polyglycerol-modified silicones and amino-modified silicones;

[0255] Ingredient (D): dimethyl polysiloxane.

[0256] <2>

[0257] according to <1> The hair treatment method, wherein the viscosity of a 1 mass % aqueous solution of 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, further 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.

[0258] <3>

[0259] according to <1> or <2> The hair treatment method, wherein the weight average molecular weight (Mw) of component (A) is 5,000 to 3,000,000, preferably 10,000 to 2,000,000, more preferably 30,000 to 2,000,000, further preferably 50,000 to 1,500,000, and still more preferably 100,000 to 1,500,000.

[0260] <4>

[0261] according to <1> to <3> The hair treatment method according to any one of the preceding claims, wherein the cationic charge density of the component (A) is from 0.1 mmol / g to 20 mmol / g, preferably from 0.2 mmol / g to 15 mmol / g, more preferably from 0.2 mmol / g to 12 mmol / g, further preferably from 0.3 mmol / g to 10 mmol / g, still more preferably from 0.3 mmol / g to 7.0 mmol / g, and still more preferably from 0.5 mmol / g to 5.0 mmol / g.

[0262] <5>

[0263] according to <1> to <4> The hair treatment method according to any one of the preceding claims, wherein component (A) is one or more cationic polymers selected from the group consisting of cationic polyvinyl alcohol, polyethyleneimine, methacryloylethyltrimethylammonium salt polymers, quaternized dialkylaminoalkyl (meth)acrylate polymers, diallylquaternary ammonium salt polymers, methacrylamidopropyltrimethylammonium salt polymers, vinylimidazolium trichloride-vinyl pyrrolidone copolymers (polyquaternium-16), vinyl pyrrolidone-alkylamino (meth)acrylate copolymers, vinyl pyrrolidone-alkylamino (meth)acrylate-vinyl caprolactam copolymers, alkylacrylamide-(meth)acrylate-alkylaminoalkylacrylamide-polyethylene glycol (meth)acrylate copolymers, and adipic acid-dimethylaminohydroxypropylethylenetriamine copolymers.

[0264] <6>

[0265] according to <1> to <5> The hair treatment method according to any one of the preceding claims, wherein the component (A) is a polymer containing a structural unit represented by the following general formula (1):

[0266]

[0267] Among them, R 1 is a hydrogen atom or a methyl group, R 2 To R 4 Each is independently an alkyl group having 1 to 4 carbon atoms, X is -O- or -NH-, and m is a number of 1 or more and 4 or less.

[0268] <7>

[0269] according to <6> The hair treatment method, wherein the structural unit represented by the general formula (1) comprises: at least one selected from the group consisting of a structural unit derived from methacryloylethyl trimethyl ammonium salt, a structural unit derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate and methacrylamide propyl trimethyl ammonium salt, preferably at least one selected from the group consisting of a structural unit derived from methacryloylethyl trimethyl ammonium salt and a structural unit derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate.

[0270] <8>

[0271] according to <1> to <7> The hair treatment method according to any one of the preceding claims, wherein the component (A) is at least one selected from methacryloylethyl trimethyl ammonium salt polymers and quaternized dialkylaminoalkyl (meth)acrylate polymers; preferably selected from methacryloylethyl trimethyl ammonium chloride polymers (Polyquaternium-37), methacryloylethyl dimethyl betaine-methacryloylethyl trimethyl ammonium chloride-methoxy polyethylene glycol methacrylate copolymers (Polyquaternium-49), methacryloylethyl dimethyl betaine-methacryloylethyl trimethyl ammonium chloride-methoxy polyethylene glycol methacrylate copolymers (Polyquaternium-51), and methacryloylethyl dimethyl betaine-methacryloylethyl trimethyl ammonium chloride-methoxy polyethylene glycol methacrylate copolymers (Polyquaternium-60). 2-hydroxyethyl methacrylate copolymer (Polyquaternium-48), and N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (Polyquaternium-52) One or more; More preferably, it is selected from methacryloylethyl trimethylammonium polymer (Polyquaternium-37) and N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (Polyquaternium-52) One or more.

[0272] <9>

[0273] according to <1> to <8> The hair treatment method according to any one of the preceding claims, wherein the content of the component (A) in the composition (1) is from 0.01% by mass to 3.0% by mass, preferably from 0.02% by mass to 2.5% by mass, more preferably from 0.05% by mass to 2.0% by mass, further preferably from 0.1% by mass to 1.5% by mass, still more preferably from 0.2% by mass to 1.5% by mass, and still more preferably from 0.2% by mass to 0.5% by mass.

[0274] <10>

[0275] according to <1> to <9> The hair treatment method described in any one of the preceding claims, wherein the component (B) comprises one or more anionic polymers selected from a cross-linked polymer containing a structural unit derived from (meth)acrylic acid and anionic polysaccharides.

[0276] <11>

[0277] according to <10> The hair treatment method, wherein the cross-linked polymer containing a structural unit derived from (meth)acrylic acid is at least one selected from carboxyvinyl polymer or a salt thereof, (acrylate-alkyl acrylate (C10-30)) cross-linked polymer, (sodium acrylate-acryloyldimethyltaurate-dimethylacrylamide) cross-linked polymer, and acrylate cross-linked polymer-4.

[0278] <12>

[0279] according to <10> In the hair treatment method, the anionic polysaccharide is a polysaccharide having a carboxyl group or a salt thereof, preferably alginic acid, carboxymethyl cellulose or a salt thereof, and more preferably alginic acid or a salt thereof.

[0280] <13>

[0281] according to <1> to <12> The hair treatment method according to any one of claims 1 to 4, wherein the content of the component (B) in the composition (1) is from 0.005% by mass to 3.0% by mass, preferably from 0.01% by mass to 2.0% by mass, more preferably from 0.02% by mass to 1.5% by mass, further preferably from 0.02% by mass to 1.0% by mass, still more preferably from 0.02% by mass to 0.5% by mass, still more preferably from 0.02% by mass to 0.3% by mass, still more preferably from 0.02% by mass to 0.2% by mass, still more preferably from 0.02% by mass to 0.1% by mass, still more preferably from 0.02% by mass to 0.1% by mass, and still more preferably from 0.02% by mass to 0.08% by mass.

[0282] <14>

[0283] according to <1> to <13> The hair treatment method according to any one of the preceding claims, wherein the total content of component (A) and component (B) in composition I is 0.015% by mass or more and 6.0% by mass or less, preferably 0.02% by mass or more and 5.0% by mass or less, more preferably 0.03% by mass or more and 4.5% by mass or less, further 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. % and 3.5 mass %, still more preferably 0.1 mass % and 3.0 mass % or less, still more preferably 0.12 mass % and 2.5 mass % or less, still more preferably 0.22 mass % and 2.0 mass % or less, still more preferably 0.22 mass % and 0.8 mass % or less, still more preferably 0.22 mass % and 0.7 mass % or less, still more preferably 0.22 mass % and 0.6 mass % or less, and still more preferably 0.22 mass % and 0.58 mass % or less.

[0284] <15>

[0285] according to <1> to <14> The hair treatment method according to any one of the preceding claims, wherein the mass ratio of the component (A) to the component (B) contained in the composition (1) [(A) / (B)] is from 1.0 to 20, preferably from 2.0 to 15, more preferably from 3.0 to 12, further preferably from 4.0 to 12, and still more preferably from 5.0 to 10.

[0286] <16>

[0287] according to <1> to <15> The hair treatment method according to any one of the preceding claims, wherein the polyglyceryl-modified silicone is one or more selected from the group consisting of polyglyceryl-3-polydimethylsiloxyethyl dimethicone, polyglyceryl-3-disiloxane dimethicone, lauryl polyglyceryl-3-polydimethylsiloxyethyl dimethicone, cetyl diglyceryl tri(trimethylsiloxy)silylethyl dimethicone and bis(polyglyceryl-3-oxyphenylpropyl) dimethicone.

[0288] <17>

[0289] according to <1> to <16> The hair treatment method according to any one of the preceding claims, wherein the amino-modified silicone is a silicone represented by the following general formula (2):

[0290]

[0291] Among them, R 11 Each independently represents a methyl group or a phenyl group, R 12Each independently represents an alkyl group having 1 to 30 carbon atoms, a hydroxyl group, or R 13 ; R 13 Indicated by -R 14 -Z 1 The monovalent group (R 14 represents a single bond or a divalent hydrocarbon group having 1 to 20 carbon atoms, Z 1 represents a group containing a primary to tertiary amino group or a group containing an ammonium group); a is a number from 0 to 3000, b is a number from 1 to 3000, and a+b is a number from 3,000 to 20,000.

[0292] <18>

[0293] according to <17> The hair treatment method, wherein the amino-modified silicone is one or more selected from aminoethylaminopropyl dimethicone [amino dimethicone], aminopropyl dimethicone, bis (aminopropyl) dimethicone and bis (cetylstearyl) amino dimethicone.

[0294] <19>

[0295] according to <1> to <18> The hair treatment method according to any one of the preceding claims, wherein the content of the component (C) in the composition II is from 0.01% by mass to 5.0% by mass, preferably from 0.02% by mass to 3.0% by mass, more preferably from 0.05% by mass to 2.0% by mass, still more preferably from 0.1% by mass to 1.0% by mass, and still more preferably from 0.5% by mass to 1.0% by mass.

[0296] <20>

[0297] according to <1> to <19> The hair treatment method according to any one of the preceding claims, wherein the component (D) has a molecular weight of 300,000 mm at 25°C. 2 / s or more and 5,000,000mm 2 / s or less dimethyl polysiloxane.

[0298] <21>

[0299] according to <1> to <20> The hair treatment method according to any one of the preceding claims, wherein the content of the component (D) in the composition II is from 0.05% by mass to 15% by mass, preferably from 0.1% by mass to 10% by mass, more preferably from 0.3% by mass to 8.0% by mass, further preferably from 0.5% by mass to 5.0% by mass, and still more preferably from 1.0% by mass to 4.0% by mass.

[0300] <22>

[0301] according to <1> to <21> The hair treatment method according to any one of the preceding claims, wherein the total content of component (C) and component (D) in composition II is from 0.06% by mass to 20% by mass, preferably from 0.1% by mass to 15% by mass, more preferably from 0.3% by mass to 10% by mass, further preferably from 0.5% by mass to 10% by mass, still more preferably from 0.6% by mass to 6.0% by mass, and still more preferably from 1.0% by mass to 5.0% by mass.

[0302] <22>

[0303] according to <1> to <21> The hair treatment method according to any one of the above aspects, wherein the composition II further comprises (E) a cationic surfactant.

[0304] <23>

[0305] according to <22> The hair treatment method, wherein the cationic surfactant is one or more selected from (i) alkyltrimethylammonium salts, (ii) alkoxyalkyltrimethylammonium salts, (iii) dialkyldimethylammonium salts, (iv) alkylamidealkyltrimethylammonium salts, (v) alkyldimethylamines and their salts, (vi) alkoxyalkyldimethylamines and their salts, and (vii) alkylamidealkyldimethylamines and their salts; more preferably, it is one or more selected from (i) alkyltrimethylammonium salts and (vi) alkoxyalkyldimethylamines and their salts; more preferably, it is one or more selected from cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, N,N-dimethyl-3-hexadecyloxypropylamine or its lactate, and N,N-dimethyl-3-octadecyloxypropylamine (stearyloxypropyldimethylamine) or its lactate; still more preferably, it is one or more selected from behenyltrimethylammonium chloride and N,N-dimethyl-3-octadecyloxypropylamine (stearyloxypropyldimethylamine) or its lactate.

[0306] <24>

[0307] according to <22> or <23> The hair treatment method, wherein the content of component (E) in 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 further preferably 2.0% by mass or more and 3.0% by mass or less.

[0308] <25>

[0309] according to <1> to <24> The hair treatment method described in any one of the above, wherein the composition II further comprises (F) a higher alcohol.

[0310] <26>

[0311] according to <25> In the hair treatment method, the higher alcohol is one or more selected from cetyl alcohol, myristyl alcohol, stearyl alcohol and behenyl alcohol.

[0312] <27>

[0313] according to <25> or <26> The hair treatment method, wherein the content of component (F) in composition II is 0.1 mass% to 15 mass%, preferably 0.2 mass% to 12 mass%, more preferably 0.5 mass% to 12 mass%, still more preferably 1.0 mass% to 10 mass%, and still more preferably 5.0 mass% to 10 mass%.

[0314] <28>

[0315] according to <1> to <27> The hair treatment method according to any one of the preceding claims, wherein the composition I further comprises a nonionic polymer (G).

[0316] <29>

[0317] according to <28> The hair treatment method, wherein the nonionic polymer (G) is one or more selected from polyalkylene glycol or its derivatives and polymers containing structural units derived from vinyl pyrrolidone, preferably one or more selected from polyethylene glycol, polypropylene glycol, polyethylene glycol-polypropylene glycol copolymer, mono- or di-fatty acid esters thereof, and polyvinyl pyrrolidone, more preferably one or more selected from polyethylene glycol, polyethylene glycol-polypropylene glycol copolymer, mono- or di-fatty acid esters thereof, and polyvinyl pyrrolidone.

[0318] <30>

[0319] according to <28> or <29> The hair treatment method, wherein the content of component (G) in composition I is from 0.01% by mass to 3.0% by mass, preferably from 0.02% by mass to 2.5% by mass, more preferably from 0.05% by mass to 2.0% by mass, still more preferably from 0.1% by mass to 1.5% by mass, further preferably from 0.1% by mass to 1.0% by mass, and still more preferably from 0.2% by mass to 0.6% by mass.

[0320] <31>

[0321] according to <1> to <30> The hair treatment method according to any one of the above, wherein the composition I further comprises (H) an acid.

[0322] <32>

[0323] according to <31> The hair treatment method, wherein the acid is one or more selected from aliphatic dicarboxylic acids, hydroxycarboxylic acids and aromatic sulfonic acids, preferably one or more selected from succinic acid, lactic acid, malic acid, glycolic acid, p-toluenesulfonic acid and naphthalenesulfonic acid, more preferably one or more selected from succinic acid and lactic acid, and further preferably lactic acid.

[0324] <33>

[0325] according to <31> or <32> The hair treatment method, wherein the content of component (H) in composition I is from 0.01% by mass to 5.0% by mass, preferably from 0.02% by mass to 3.0% by mass, more preferably from 0.03% by mass to 3.0% by mass, further more preferably from 0.05% by mass to 3.0% by mass, still more preferably from 0.05% by mass to 3.0% by mass, still more preferably from 0.1% by mass to 3.0% by mass, still more preferably from 0.1% by mass to 2.5% by mass, still more preferably from 0.2% by mass to 2.5% by mass, and still more preferably from 0.2% by mass to 0.5% by mass.

[0326] <34>

[0327] according to <1> to <33> The hair treatment method according to any one of the preceding claims, wherein the viscosity of the composition I at 30° C. is 1 mPa-s or more and 10,000 mPa-s or less, preferably 5 mPa-s or more and 5,000 mPa-s or less, and more preferably 10 mPa-s or more and 1,500 mPa-s or less.

[0328] <35>

[0329] according to <1> to <34> The hair treatment method according to any one of the preceding claims, wherein the viscosity of 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.

[0330] <36>

[0331] according to <1> to <35> The hair processing method described in any one of the above, wherein step 1 and step 2 are performed continuously.

[0332] <37>

[0333] according to <1> to <36> The hair treatment method according to any one of the preceding claims, further comprising a subsequent step of rinsing the composition I and the composition II applied to the hair with water.

[0334] <38>

[0335] according to <1> to <36> The hair treatment method according to any one of the preceding claims, further comprising any one or more steps selected from the following steps A and B,

[0336] Step A: a step of applying a shampoo to the hair and optionally rinsing the shampooed hair;

[0337] Step B: a step of applying a conditioner to the hair and optionally rinsing the conditioned hair.

[0338] <39>

[0339] A hair treatment kit, wherein the hair treatment kit comprises: a composition I for application to hair containing the following components (A) and (B), and a composition II for application to hair containing the following components (C) and (D),

[0340] Component (A): a cationic polymer having a viscosity of 1,000 mPa-s or more in a 1 mass % aqueous solution at 30°C;

[0341] Component (B): anionic polymer;

[0342] Component (C): at least one modified silicone selected from polyglycerol-modified silicone and amino-modified silicone; and

[0343] Ingredient (D): dimethyl polysiloxane.

[0344] <40>

[0345] A hair treatment kit, wherein the hair treatment kit comprises: a composition I for application to hair containing the following components (A) and (B), and a composition II for application to hair containing the following components (C) and (D),

[0346] The kit is used in a method for treating hair, wherein composition I and composition II are applied to the hair in any order, and does not include: rinsing the hair with water between applying composition I and applying composition II,

[0347] Component (A): a cationic polymer having a viscosity of 1,000 mPa-s or more in a 1 mass % aqueous solution at 30°C;

[0348] Component (B): anionic polymer;

[0349] Component (C): at least one modified silicone selected from polyglycerol-modified silicone and amino-modified silicone; and

[0350] Ingredient (D): dimethyl polysiloxane.

[0351] <41>

[0352] Use of a combination of a composition I comprising the following ingredients (A) and (B) and a composition II comprising the following ingredients (C) and (D) for improving the shape and texture of hair, preferably regardless of the hair diameter and degree of damage,

[0353] Component (A): a cationic polymer having a viscosity of 1,000 mPa-s or more in a 1 mass % aqueous solution at 30°C;

[0354] Component (B): anionic polymer;

[0355] Component (C): at least one modified silicone selected from polyglycerol-modified silicone and amino-modified silicone; and

[0356] Ingredient (D): dimethyl polysiloxane.

[0357] <42>

[0358] Use of a combination of a composition I comprising the following ingredients (A) and (B) and a composition II comprising the following ingredients (C) and (D) for maintaining improved hair shape and texture, preferably regardless of hair diameter and degree of damage,

[0359] Component (A): a cationic polymer having a viscosity of 1,000 mPa-s or more in a 1 mass % aqueous solution at 30°C;

[0360] Component (B): anionic polymer;

[0361] Component (C): at least one modified silicone selected from polyglycerol-modified silicone and amino-modified silicone; and

[0362] Ingredient (D): dimethyl polysiloxane.

[0363] <43>

[0364] according to <37> or <38> The use of the method of claim 1, wherein composition I and composition II are applied to the hair in any order and does not include: rinsing the hair with water between applying composition I and applying composition II.

[0365] Example

[0366] The present invention will be described below with reference to Examples; however, the present invention is not limited to the scope of the Examples.

[0367] (Viscosity measurement of 1 mass % aqueous solution of cationic polymer)

[0368] A 1 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 at 30° C. was measured using a B-type viscometer (TV-20, manufactured by Toki Sangyo Co., Ltd.). In the present example, the cationic polymer other than component (A) is referred to as "component (A')".

[0369] (Measurement of Viscosity of Composition)

[0370] The viscosity of composition I at 30° C. was measured using a B-type viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd.) at a rotor of "M3", 12 rpm, and 1 minute. The viscosity of composition II at 30° C. was measured using a B-type viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd.) at a rotor of "TC", 30 rpm, and 1 minute.

[0371] Example 1

[0372] (1) Preparation of hair bundle

[0373] Using Asian women's straight hair (fine hair type: hair diameter 40 to 70 mm; also called F-type hair) and Asian women's straight hair (coarse hair type: hair diameter 80 to 110 mm; also called T-type hair), hair bundles with a length of 25 cm and a mass of 5 g were prepared respectively.

[0374] (2) Preparation of Composition I and Composition II

[0375] Composition I-1 was prepared using the amounts of the respective components shown in Table 1 below as Composition I. Composition II-1 was prepared using the amounts of the respective components shown in Table 1 below as Composition II.

[0376] Table 1

[0377]

[0378] Table 2

[0379]

[0380] The components listed in the table are as follows: The blending amount (mass %) described in the table is an effective amount of each component.

[0381] <Component (A): Cationic polymer>

[0382] *1Polyquaternium-52 (N,N-dimethylaminoethyl methacrylate diethyl sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer), "SOFCARE KG-101W-E" manufactured by Kao Corporation; charge density 0.83 mmol / g, 1% viscosity 2,560 mPa-s, active ingredient amount 2.4 mass%

[0383] *2 Polyquaternium-37 (methacryloylethyltrimethylammonium chloride polymer), “Cosmedia Ultragel 300” manufactured by BASF Japan Ltd.; charge density 4.81 mmol / g, 1% viscosity 17,650 mPa-s

[0384] <Component (A'): Cationic polymer other than component (A)>

[0385] *3 Polyquaternium-10 (cationized hydroxyethyl cellulose), "UCARE Polymer JR-400P" manufactured by Dow Chemical Japan Co., Ltd.; 1% viscosity of 200 mPa-s or less

[0386] *4 Polyquaternium-22 (dimethyldiallylammonium chloride-acrylic acid copolymer liquid), "Marcourt 295" manufactured by Lubrizol Advanced Materials; charge density 6.04 mmol / g, 1% viscosity 5.6 mPa-s, active ingredient amount 37 mass%

[0387] <Component (B): Anionic polymer>

[0388] *5 Sodium alginate, "Kimika Argin I-3-150" manufactured by Kimika Co., Ltd., Mw: 90,000

[0389] *6 Carboxymethyl cellulose, “Cellogen F-5a” manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., Mw: 150,000

[0390] *7 Acrylates - C10-30 Alkyl Acrylate Crosspolymer, "Pemulen TR-1 Polymer" manufactured by Lubrizol Advanced Materials, Inc.

[0391] <Ingredient (G): Nonionic polymer>

[0392] *8 Polyvinylpyrrolidone, “Luviskol K90” manufactured by BASF Japan Ltd., Mw 1,200,000

[0393] <Ingredient (H): Acid>

[0394] *9 90% lactic acid, “PURACULTRAPURE 90” manufactured by PURAC Thailand Ltd.

[0395] <Other ingredients>

[0396] *10Dipropylene glycol, "DPG-RF" manufactured by ADEKA CORPORATION

[0397] <Ingredient (C): Modified Silicone>

[0398] *11 Amino-modified silicone, "DOWSIL 2-8566AMINO FLUID" manufactured by Dow Toray Co., Ltd.

[0399] *12 Amino-modified silicone, "Silicone SF 8457C" manufactured by Dow Toray Co., Ltd.

[0400] <Ingredient (D): dimethyl polysiloxane>

[0401] *13 Dimethyl polysiloxane, “Silicone KHS-3” manufactured by Shin-Etsu Chemical Co., Ltd.

[0402] <Component (C): modified silicone and component (D): dimethyl polysiloxane>

[0403] *14 A mixture of dimethyl polysiloxane (number average degree of polymerization 550), dimethyl polysiloxane (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.

[0404] <Ingredient (E): Cationic surfactant>

[0405] *15 Stearyloxypropyl dimethylamine, "Farmin DM-E80" manufactured by Kao Corporation, active ingredient amount: 90% by mass

[0406] <Ingredient (F): Higher Alcohol>

[0407] *16 Stearyl alcohol, BASF's "LANETTE 18"

[0408] (3) Hair treatment

[0409] - Preliminary steps

[0410] The F-shaped hair bundle and the T-shaped hair bundle prepared above were washed and rinsed with shampoo, and then the hair bundles were dried with a towel until the total weight of the hair bundles reached 7.5 g (150% of the weight of the hair bundles before washing).

[0411] -Step 1

[0412] The composition I-1 was applied to the F-type hair bundle and the T-type hair bundle respectively, so that the ratio of the dry mass of the hair bundle to the mass of the composition I-1, i.e., the bath ratio was 1:0.2, and then combed 5 times to evenly distribute the composition I-1 on the hair bundle.

[0413] -Step 2

[0414] Without rinsing the composition I-1 and without performing any other steps, the composition II-1 was applied to the hair bundle to which the composition I-1 had been applied in step 1, so that the ratio of the dry mass of the hair bundle to the mass of the composition II-1, i.e., the bath ratio, was 1:0.2, and then combed 5 times to evenly distribute the composition II-1 on the hair bundle.

[0415] - Next steps

[0416] The hair was rinsed with warm water at 35° C. for 30 seconds and dried with hot air for 2 minutes using a hair dryer (trade name “Nobby Professional Protector Ion Hair Dryer NIB3000”, manufactured by Tescom Denki Co., Ltd.) at a distance of 15 cm from the hair.

[0417] Evaluation Methodology

[0418] Two expert panelists evaluated the treated hair strands for items such as "moisturizing feel", "smoothness", "softness", "light effect" and "naturalness" using a 5-point scale ranging from 1 (clearly low or clearly poor) to 5 (clearly high or clearly excellent).

[0419] Details of the assessment items are listed below.

[0420] The moisturizing feeling of the hair is evaluated by the touch of the hair, such as soft hair touch and flexibility of hair movement. Since dry hair is characterized by fragile and porous hair, low porosity is another indicator of moisturizing hair feeling.

[0421] Smoothness is assessed by the appearance and feel of the hair surface. Smoothness of hair is related to a smooth surface, so the appearance of smooth hair is shiny and smooth, without frizz or irregular hair fibers sticking out. The touch of smooth hair is uniform and smooth, without roughness and tangles.

[0422] Assess the softness of the hair by touching the hair strands. Soft hair offers no resistance when touched or combed and moves flexibly. The feel can be described as pleasant and natural.

[0423] The lightening effect is assessed by the look and feel of the hair. Volume and elasticity are the most important indicators of the lightening effect. After a lightening treatment, the hair fiber does not show any signs of coating or weighting.

[0424] The natural state of hair is evaluated by the look and feel of the hair strands. Unnatural hair can be described as artificial and coated, while natural hair feels pliable and light. Natural hair is seen as healthy and springy.

[0425] Table 3 shows the average of the evaluations of the two expert panelists as the evaluation results.

[0426] The evaluations of smoothness and glossiness and lightness and naturalness have a trade-off relationship, and scores of 3 or more are well-balanced in any evaluation, and it is evaluated that the effects of the present invention are sufficiently exhibited.

[0427] Example 2

[0428] The hair treatment was performed in the same manner as in Example 1, except that Composition II-2 was prepared as Composition II using the amounts of the respective components shown in Table 2 above, and evaluation was performed.

[0429] Example 3

[0430] Hair treatment was performed in the same manner as in Example 1, except that Composition I-2 was prepared as Composition I using the amounts of the respective components shown in Table 1 above, and evaluation was performed. The evaluation results are shown in Table 3.

[0431] Example 4

[0432] Hair treatment was performed in the same manner as in Example 1, except that Composition I-3 was prepared as Composition I using the amounts of the respective components shown in Table 1 above, and evaluation was performed. The evaluation results are shown in Table 3.

[0433] Example 5

[0434] Hair treatment was performed in the same manner as in Example 1, except that Composition I-4 was prepared as Composition I using the amounts of the respective components shown in Table 1 above, and evaluation was performed. The evaluation results are shown in Table 3.

[0435] Example 6

[0436] - Preliminary steps

[0437] The preparatory steps are the same as those in Example 1.

[0438] -Step 2

[0439] The composition II-1 prepared in the same manner as in Example 1 was applied to a hair bundle of F-type hair and a hair bundle of T-type hair, respectively, so that the ratio of the dry mass of the hair bundle to the mass of the composition II-1 was 1:0.2, and then combed 5 times to evenly distribute the composition II-1 on the hair bundle.

[0440] -Step 1

[0441] Without rinsing the composition II-1 and without performing any other steps, the composition I-1 prepared in the same manner as in Example 1 was applied to the hair bundle to which the composition I-1 had been applied in step 1, so that the ratio of the dry mass of the hair bundle to the mass of the composition I-1 was 1:0.2, and then combed 5 times to evenly distribute the composition I-1 on the hair bundle.

[0442] - Next steps

[0443] The subsequent steps were carried out in the same manner as in Example 1.

[0444] Comparative Example 1

[0445] Only composition I-1 was applied to the hair, and the hair was treated for evaluation in the same manner as in Example 1. The evaluation results are shown in Table 3.

[0446] Comparative Example 2

[0447] Only composition II-1 was applied to the hair, and the hair was treated for evaluation in the same manner as in Example 1. The evaluation results are shown in Table 3.

[0448] Comparative Example 3

[0449] Hair treatment was performed and evaluated in the same manner as in Example 1 except that Composition I-c1 was prepared as Composition I using the amounts of the components shown in Table 1 above. The evaluation results are shown in Table 3.

[0450] Comparative Example 4

[0451] Hair treatment was performed and evaluated in the same manner as in Example 1 except that Composition I-c2 was prepared as Composition I using the amounts of the components shown in Table 1 above. The evaluation results are shown in Table 3.

[0452] Comparative Example 5

[0453] The hair treatment was performed and evaluated in the same manner as in Example 1 except that Composition II-c1 was prepared as Composition II using the amounts of the components shown in Table 2 above. The evaluation results are shown in Table 3.

[0454] Comparative Example 6

[0455] The hair treatment was performed and evaluated in the same manner as in Example 1 except that Composition II-c2 was prepared as Composition II using the amounts of the components shown in Table 2 above. The evaluation results are shown in Table 3.

[0456] Comparative Example 7

[0457] The hair treatment was performed 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 Step 1 and Step 2, and the evaluation was performed. The evaluation results are shown in Table 3.

[0458] Comparative Example 8

[0459] The hair treatment was performed in the same manner as in Example 6, except that the hair bundle was rinsed with warm water at 35° C. for 30 seconds between Step 2 and Step 1, and the evaluation was performed. The evaluation results are shown in Table 3.

[0460] Table 3

[0461]

[0462] As shown in Table 3, it was found that the hair treatment method of the present invention can achieve the effect of improving hair shape and texture and the effect is sustainable regardless of the hair diameter and degree of damage, and at the same time achieve not only smoothness and moisture but also lightness and naturalness.

[0463] Industrial Applicability

[0464] The present invention can provide a hair treatment method which can achieve the effect of improving hair shape and texture and the effect is sustainable regardless of the hair diameter and degree of damage, and can simultaneously achieve not only smoothness and moisture but also lightness and naturalness.

Claims

1. A method for treating hair, wherein: The hair treatment method comprises: the following steps 1 and 2 performed in any order, and does not include: rinsing the hair with water between steps 1 and 2: Step 1: A step of applying a composition I comprising the following ingredients (A) and (B) to the hair: Component (A): a cationic polymer having a viscosity of 1,000 mPa-s or more in a 1 mass % aqueous solution at 30°C; Component (B): anionic polymer; and Step 2: A step of applying composition II comprising the following ingredients (C) and (D) to the hair: Component (C): one or more modified silicones selected from polyglycerol-modified silicones and amino-modified silicones; Ingredient (D): dimethyl polysiloxane.

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): Among them, R 1 is a hydrogen atom or a methyl group, R 2 To R 4 Each is independently an alkyl group having 1 to 4 carbon atoms, X is -O- or -NH-, and m is a number of 1 or more and 4 or less.

3. The hair treatment method according to claim 1 or 2, wherein: The component (B) includes: at least one anionic polymer selected from a cross-linked polymer including a structural unit 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-dimethylaminoethylmethacrylate diethylsulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer.

6. The hair treatment method according to any one of claims 1 to 5, wherein: The component (D) has a particle size of 300,000 mm at 25°C. 2 / s or more and 5,000,000mm 2 / s or less dimethyl polysiloxane.

7. The hair treatment method according to any one of claims 1 to 6, wherein: The mass ratio (A) / (B) of the component (A) to the component (B) contained in the 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 comprises a nonionic polymer (G).

9. The hair treatment method according to claim 8, wherein: The nonionic polymer (G) is at least one selected from polyalkylene glycol or a derivative thereof and a polymer containing a structural unit derived from vinyl pyrrolidone.

10. The hair treatment method according to any one of claims 1 to 9, wherein: The step 1 and the step 2 are performed continuously.

11. A hair treatment kit, wherein: The hair treatment kit comprises: a composition I for application to hair containing the following components (A) and (B), and a composition II for application to hair containing the following components (C) and (D), Component (A): a cationic polymer having a viscosity of 1,000 mPa-s or more in a 1 mass % aqueous solution at 30°C; Component (B): anionic polymer; Component (C): at least one modified silicone selected from polyglycerol-modified silicone and amino-modified silicone; and Ingredient (D): dimethyl polysiloxane.

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