Hair cosmetic composition or fiber treatment composition for head decorative products

Abstract

To provide a hair cosmetic composition or a fiber treatment composition for a head decorative product, which exhibits an effect of suppressing fading of hair or a fiber for a head decorative product after dyeing and is excellent in durability of the effect.SOLUTION: The component (A) is an organopolysiloxane in which a poly (N-acylalkyleneimine) segment (b) composed of a predetermined repeating unit is bonded to at least two silicon atoms of an organopolysiloxane segment (a) constituting a main chain via an alkylene group containing a heteroatom, a mass ratio (a / b) of the organopolysiloxane segment (a) to the poly (N-acylalkyleneimine) segment (b) is 70 / 30 to 98 / 2, and a weight average molecular weight of the organopolysiloxane segment (a) is 10,000 to 200,000. Wherein the poly (N-acylalkyleneimine) segment (b) has a number average molecular weight of 500 to 5000; a component (B): a cationic polymer; and a component (C): an anionic polymer.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a hair cosmetic composition or a fiber treatment composition for head accessories. [Background technology]

[0002] Colored hair has problems such as fading due to pigment decomposition caused by ultraviolet rays, pigment deterioration due to oxidation, and pigment elution caused by repeated use of shampoos, treatments, etc. Patent Document 1 discloses a rinse-off hair cosmetic composition intended to provide a rinse-off hair cosmetic composition to be used before or after washing that has smoothness when applied and when rinsing and prevents elution of pigments from colored hair during washing. The rinse-off hair cosmetic composition contains (A) 1 to 10% by weight of a higher alcohol having 12 to 28 carbon atoms, (B) a specific quaternary ammonium salt or a specific tertiary amine compound or a salt thereof, (C) 20 to 70% by weight of a polyhydric alcohol, and (D) 0.01 to 10% by weight of dimethylpolysiloxane, with the molar ratio of component (A) to component (B) being 1:1 to 10:1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-187403 Summary of the Invention [Problem to be solved by the invention]

[0004] The present inventors have investigated how to further improve the effect of the hair cosmetic composition of Patent Document 1 in inhibiting hair discoloration caused by repeated washing.

[0005] The problem to be solved by the present invention is to provide a hair cosmetic composition or a fiber treatment composition for head accessories that exhibits an effect of inhibiting discoloration after dyeing of hair or fibers for head accessories and has excellent durability of the effect. [Means for solving the problem]

[0006] Incidentally, it is known that a composition containing a complex formed from a cationic polymer and an anionic polymer (hereinafter also referred to as a "polyion complex") is used as a composition for treating keratinous materials such as hair (for example, JP-A-53-139734). The present inventors have discovered that the above problems can be solved by a composition containing a specific organopolysiloxane, a cationic polymer, and an anionic polymer. The present invention relates to the following [1]. [1] Component (A): An organopolysiloxane segment (a) constituting the main chain, wherein at least two silicon atoms are connected via an alkylene group containing a heteroatom to a compound represented by the following general formula (1): [ka] (In the formula, R 1 represents a hydrogen atom, an alkyl group having 1 to 22 carbon atoms, an aralkyl group having 7 to 22 carbon atoms, or an aryl group having 6 to 22 carbon atoms, and n is 2 or 3. An organopolysiloxane comprising poly(N-acylalkyleneimine) segments (b) each having a repeating unit represented by the formula: the mass ratio (a / b) of the organopolysiloxane segment (a) to the poly(N-acylalkyleneimine) segment (b) is 70 / 30 to 98 / 2; the weight average molecular weight of the organopolysiloxane segment (a) is 10,000 or more and 200,000 or less; The organopolysiloxane in which the number average molecular weight of the poly(N-acylalkyleneimine) segment (b) is 500 or more and 5,000 or less. Component (B): Cationic polymer (however, if component (A) is a cationic polymer, component (A) is excluded) Component (C): Anionic polymer A hair cosmetic composition or a fiber treatment composition for head accessories, comprising: [Effects of the Invention]

[0007] The hair cosmetic composition or fiber treatment composition for head accessories of the present invention exhibits an effect of inhibiting discoloration of hair or fibers for head accessories after dyeing, and the effect is excellent in durability. DETAILED DESCRIPTION OF THE INVENTION

[0008] [Hair cosmetic composition or fiber treatment composition for head accessories] The hair cosmetic composition or fiber treatment composition for head accessories of the present invention (hereinafter also referred to simply as "the composition of the present invention") comprises component (A): an organopolysiloxane in which poly(N-acylalkyleneimine) segments (b) consisting of predetermined repeating units are bonded to at least two silicon atoms of organopolysiloxane segments (a) constituting the main chain via alkylene groups containing heteroatoms, and the organopolysiloxane segments (a) and the poly(N-acylalkyleneimine) segments (b) are bonded to at least two silicon atoms of the organopolysiloxane segments (a) via alkylene groups containing heteroatoms. The organopolysiloxane has a mass ratio (a / b) of 70 / 30 to 98 / 2 between the organopolysiloxane segment (a) and the poly(N-acylalkyleneimine) segment (b), wherein the weight-average molecular weight of the organopolysiloxane segment (a) is 10,000 or more and 200,000 or less, and the number-average molecular weight of the poly(N-acylalkyleneimine) segment (b) is 500 or more and 5,000 or less; component (B): a cationic polymer (however, when component (A) is a cationic polymer, component (A) is excluded); and component (C): an anionic polymer. In this specification, the phrase "containing component X" also includes blending component X. In this specification, the term "headwear" refers to, for example, hair wigs, hairpieces, weaving, hair extensions, braided hair, hair accessories, doll hair, etc., and the term "fiber for headwear" refers to the fiber used in the headwear, except that human hair is excluded from the term "fiber for headwear" in this application. As used herein, "hair" primarily refers to human scalp hair, but also includes hair that has been cut off from the human head. The composition of the present invention has the above-mentioned constitution, and thus exhibits an effect of inhibiting fading of hair or fibers for head accessories after dyeing, and the effect is excellent in durability.

[0009] The reason why the composition of the present invention exhibits the above-mentioned effects is not clear, but is thought to be as follows. The composition of the present invention contains a polyion complex formed from component (B) and component (C). In the polyion complex, a crosslinked structure is formed between component (B) and component (C) due to ionic interactions, which is believed to be the reason why films obtained using the composition of the present invention exhibit a high elastic modulus. Furthermore, the polyion complex is poorly soluble in water, and a hydrophobic film can be formed by applying a composition containing the polyion complex to an object. The formation of this hydrophobic film is believed to improve the texture and moisture resistance of the treated object. The composition of the present invention further contains a specific organopolysiloxane (oxazoline-modified silicone) as component (A). The organopolysiloxane of component (A) has high adsorption to keratinous materials. It is believed that the specific organopolysiloxane of component (A) acts on the polyion complex formed from components (B) and (C) to form a stronger hydrophobic film, thereby exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect.

[0010] The composition of the present invention is a hair cosmetic composition or a fiber treatment composition for head accessories, and is preferably a hair cosmetic composition. Furthermore, examples of product forms of the hair cosmetic composition include hair shampoo, hair rinse, hair conditioner, hair treatment (including leave-in type), hair styling agent, hair color, permanent agent, etc. Among these, from the viewpoint of the effectiveness of the effects of the present invention, hair conditioner, hair treatment, or hair styling agent is preferred.

[0011] The fibers for head accessories to which the composition of the present invention is applied may be either naturally-derived fibers or synthetic fibers, but naturally-derived fibers are preferred. Naturally-derived fibers refer to fibers collected from natural plants and animals, or artificially produced fibers made from collagen, casein, soybeans, peanuts, corn, waste silk fibroin, etc., and are used in head accessories. Of these, artificially produced fibers made from collagen, casein, soybeans, peanuts, corn, waste silk fibroin, etc. are preferred, with regenerated protein fibers such as regenerated collagen fibers made from collagen and regenerated silk fibers made from waste silk fibroin being more preferred, and regenerated collagen fibers being even more preferred.

[0012] Regenerated collagen fibers can be produced by known techniques. The composition of regenerated collagen fibers does not need to be 100% collagen, and may contain natural polymers, synthetic polymers, additives, etc. to improve quality. Furthermore, regenerated collagen fibers may be post-processed.

[0013] The preferred form of regenerated collagen fibers is filaments. Filaments are generally taken out from bobbins or boxes. Filaments that emerge from the drying process in the regenerated collagen fiber manufacturing process can also be used directly.

[0014] Examples of synthetic fibers include fibers containing a synthetic resin as a main component. From the viewpoint of ease of production of synthetic fibers and of obtaining a texture similar to that of human hair, the synthetic resin is preferably a thermoplastic resin, more preferably one or more selected from the group consisting of polyester resin, polyamide resin, polyimide resin, polyamideimide resin, vinyl chloride resin, polycarbonate resin, polyphenylene sulfide resin, and modacrylic resin (a copolymer of acrylonitrile and vinyl chloride). Here, the term "main component" refers to a component whose content in the synthetic fiber is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, still more preferably 80% by mass or more, and even more preferably 90% by mass or more, but not more than 100% by mass.

[0015] In addition to the above synthetic resins, the synthetic fibers may further contain various additives such as flame retardants, flame retardant auxiliaries, light or heat stabilizers, fluorescent agents, antioxidants, antistatic agents, and ultraviolet absorbers, as long as the effects of the present invention are not impaired.

[0016] The composition of the present invention is preferably in the form of an emulsion composition, and more preferably an oil-in-water emulsion composition from the viewpoint of improving the stability of the composition and improving the feel when used. Each component contained in the composition of the present invention will be described below.

[0017] (Component (A): Organopolysiloxane) Component (A) is an organopolysiloxane segment (a) (hereinafter simply referred to as "organopolysiloxane segment (a)") that constitutes the main chain, and at least two of the silicon atoms are connected via alkylene groups containing heteroatoms to the following general formula (1): [ka] (In the formula, R 1 represents a hydrogen atom, an alkyl group having 1 to 22 carbon atoms, an aralkyl group having 7 to 22 carbon atoms, or an aryl group having 6 to 22 carbon atoms, and n is 2 or 3. An organopolysiloxane comprising poly(N-acylalkyleneimine) segments (b) each having a repeating unit represented by the formula: the mass ratio (a / b) of the organopolysiloxane segment (a) to the poly(N-acylalkyleneimine) segment (b) is 70 / 30 to 98 / 2; the weight average molecular weight of the organopolysiloxane segment (a) is 10,000 to 200,000; The poly(N-acylalkyleneimine) segment (b) is an organopolysiloxane having a number average molecular weight of 500 to 5,000. By including component (A) in the composition, the effect of inhibiting fading of hair or fibers for head accessories after dyeing is exerted, and the duration of this effect is improved.

[0018] R in general formula (1) 1 In the formula (I), examples of the alkyl group having from 1 to 22 carbon atoms include linear, branched, or cyclic alkyl groups having from 1 to 22 carbon atoms. Specific examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, pentyl, hexyl, cyclohexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, octadecyl, nonadecyl, eicosyl, and docosyl groups. Among these, from the viewpoints of exerting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect, alkyl groups having from 1 to 10 carbon atoms are preferred, and alkyl groups having from 1 to 6 carbon atoms are more preferred. R in general formula (1) 1 In the formula, specific examples of the aralkyl having 7 to 22 carbon atoms include a benzyl group, a phenethyl group, a trityl group, a naphthylmethyl group, an anthracenylmethyl group, etc. Among these, from the viewpoints of exerting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of the effect, an aralkyl group having 7 to 14 carbon atoms is preferred, and an aralkyl group having 7 to 10 carbon atoms is more preferred. R in general formula (1) 1 In the formula (I), specific examples of the aryl group having 6 to 22 carbon atoms include a phenyl group, a tolyl group, a xylyl group, a naphthyl group, a biphenyl group, an anthryl group, a phenanthryl group, etc. Among these, from the viewpoints of exerting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect, an aryl group having 6 to 14 carbon atoms is preferred, and an aryl group having 6 to 12 carbon atoms is more preferred.

[0019] Among the above, from the viewpoint of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of the effect, R 1is preferably an alkyl group having from 1 to 22 carbon atoms, more preferably from 1 to 10 carbon atoms, and even more preferably from 1 to 6 carbon atoms. The alkyl group is preferably a linear or branched alkyl group, and more preferably a linear alkyl group.

[0020] In general formula (1), n ​​represents the number 2 or 3, and is preferably 2 from the viewpoint of availability of raw materials when producing the organopolysiloxane of the present invention.

[0021] The alkylene group containing a hetero atom functions as a linking group for the poly(N-acylalkylimine) segment (b) represented by the general formula (1). Examples of the alkylene group containing a hetero atom include alkylene groups having 2 to 20 carbon atoms and containing 1 to 3 nitrogen atoms, oxygen atoms, or sulfur atoms. From the viewpoint of exhibiting the effect of inhibiting fading after dyeing hair or fibers for head accessories and improving the durability of the effect, the alkylene group containing a heteroatom is preferably a group represented by any one of the following formulae (i) to (vii), more preferably a group represented by the following formula (i) or (ii), and even more preferably a group represented by the following formula (i). - represents a counter ion of the quaternary ammonium salt, and examples thereof include an ethyl sulfate ion, a methyl sulfate ion, a chloride ion, an iodide ion, a sulfate ion, a p-toluenesulfonate ion, and a perchlorate ion.

[0022] [ka]

[0023] Component (A) is formed by bonding the poly(N-acylalkyleneimine) segment (b) via an alkylene group containing a heteroatom to at least two of the silicon atoms of the organopolysiloxane segment (a) that constitutes the main chain. That is, component (A) has a structure in which the organopolysiloxane segment (a) constitutes the main chain and the poly(N-acylalkyleneimine) segment (b) is bonded as a side chain to at least two of the silicon atoms of the organopolysiloxane segment (a) via an alkylene group containing a heteroatom. Preferably, component (A) has a structure represented by the following general formula (2): [ka] (In the above general formula (2), R 21 each independently represents an alkyl group having 1 to 8 carbon atoms or a phenyl group, and R 22 represents an alkylene group containing a heteroatom. W represents a poly(N-acylalkyleneimine) segment (b), and R 23 represents the terminal group, and y is a number of 1 or more that represents the number of repeating organosiloxane structural units.

[0024] In the general formula (2), R 21 is preferably an alkyl group having 1 to 4 carbon atoms or a phenyl group, more preferably a methyl group or a phenyl group, and even more preferably a methyl group. R 22 represents an alkylene group containing a hetero atom, and W represents the poly(N-acylalkyleneimine) segment (b), the details and preferred embodiments of which are as described above. R 23 represents the terminal group of the poly(N-acylalkyleneimine) segment (b), and specifically includes a residue derived from the polymerization initiator used in the production of component (A). The polymerization initiator will be described later.

[0025] In component (A), the mass ratio (a / b) of the organopolysiloxane segment (a) to the poly(N-acylalkyleneimine) segment (b) is 70 / 30 to 98 / 2, preferably 75 / 25 to 96 / 4, more preferably 80 / 20 to 95 / 5, and even more preferably 84 / 16 to 92 / 8, from the viewpoint of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect. The above mass ratio (a / b) was determined by dissolving 5% by mass of the organopolysiloxane (component (A)) in deuterated chloroform and measuring the mass ratio by nuclear magnetic resonance ( 1 H-NMR analysis was performed to determine the integral ratio of the alkyl or phenyl groups in the organopolysiloxane segment (a) to the methylene groups in the poly(N-acylalkyleneimine) segment (b).

[0026] The weight average molecular weight (Mwsi) of the organopolysiloxane segment (a) is from 10,000 to 200,000, preferably from 50,000 to 170,000, more preferably from 70,000 to 150,000, and even more preferably from 80,000 to 120,000, from the viewpoint of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of the effect.

[0027] The weight average molecular weight (Mwsi) of the organopolysiloxane segment (a) can be considered to be approximately the same as the weight average molecular weight of the raw material polysiloxane, since the organopolysiloxane segment (a) has a common skeleton with the modified organopolysiloxane (hereinafter also referred to as the "raw material polysiloxane"), which is a raw material compound described below. The weight average molecular weight of the raw material polysiloxane is a weight average molecular weight in terms of polystyrene measured by gel permeation chromatography (GPC) under the following conditions. [Measurement conditions] Column: Super HZ4000 + Super HZ2000 (Tosoh Corporation) Eluent: 1mM triethylamine / tetrahydrofuran Flow rate: 0.35mL / min Column temperature: 40℃ Detector: UV Sample injection volume: 50 μL

[0028] The number average molecular weight (Mnox) of the poly(N-acylalkyleneimine) segment (b) is from 500 to 5,000, preferably from 1,200 to 4,000, more preferably from 2,000 to 3,000, from the viewpoint of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of the effect. The number average molecular weight of the poly(N-acylalkyleneimine) segment (b) can be measured by the GPC method in the same manner as described above, or can be calculated from the molecular weight and degree of polymerization of the N-acylalkyleneimine unit in component (A).

[0029] In component (A), the weight average molecular weight (Mwg) of the organopolysiloxane segment between adjacent poly(N-acylalkyleneimine) segments (b) is preferably 5,000 or more and 40,000 or less, more preferably 10,000 or more and 35,000 or less, and even more preferably 15,000 or more and 32,000 or less, from the viewpoint of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect. Here, the term "organopolysiloxane segment between adjacent poly(N-acylalkyleneimine) segments (b)" refers to the area surrounded by a dashed line between the two points from the bonding point (bonding point α) of the poly(N-acylalkyleneimine) segment to the organopolysiloxane segment to the bonding point (bonding point β) of the adjacent poly(N-acylalkyleneimine) segment, as shown in the following general formula (2'), and is one R 21 R 22 SiO units and y+1 (R 21 )2SiO units. [ka] In general formula (2'), R 21 , R 22 , W., R. 23and y is the same as in the general formula (2).

[0030] The weight-average molecular weight (Mwg) is the molecular weight of the portion enclosed by the dashed line in the general formula (2'), and can be interpreted as the mass (g / mol) of organopolysiloxane segments per mole of poly(N-acylalkyleneimine) segment (b). When the functional groups for introducing the poly(N-acylalkyleneimine) segment (b) in the modified organopolysiloxane, which is the raw material polysiloxane for component (B), are 100% substituted with poly(N-acylalkyleneimine), the mass (g / mol) of organopolysiloxane segments per mole of poly(N-acylalkyleneimine) segment (b) will be the same as the mass (g / mol) of organopolysiloxane segments per mole of the functional groups in the modified organopolysiloxane.

[0031] The weight average molecular weight (Mwg) can be calculated from the following formula (II) using the content (Csi) of organopolysiloxane segment (a) that constitutes the main chain in component (A). Mwg=(Csi×Mwox) / (100-Csi) (II) In formula (II), Mwg is the weight-average molecular weight of the organopolysiloxane segment between adjacent poly(N-acylalkyleneimine) segments (b) in component (A). Csi is the content of organopolysiloxane segment (a) constituting the main chain in component (A). Mwox is the number-average molecular weight of poly(N-acylalkyleneimine) segment (b).

[0032] The weight average molecular weight (Mw t ) is preferably 15,000 or more and 240,000 or less, more preferably 60,000 or more and 200,000 or less, even more preferably 80,000 or more and 170,000 or less, and still more preferably 90,000 or more and 140,000 or less, from the viewpoint of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of the effect. The weight average molecular weight (Mwt ) can be calculated from the weight average molecular weight of the raw material polysiloxane of component (A) and the mass ratio (a / b) of the organopolysiloxane segment (a) to the poly(N-acylalkyleneimine) segment (b).

[0033] Component (A) can be produced by known methods, for example, according to the method described in JP-A-7-133352, by reacting a modified organopolysiloxane (raw material polysiloxane) represented by the following general formula (3) with a terminally reactive poly(N-acylalkyleneimine) obtained by ring-opening polymerization of a cyclic iminoether represented by the following general formula (4). [ka] In the above general formula (3), R 21 is the same as above, and R 24 , R 25 are each independently, R 21 or a monovalent group represented by any one of the following formulas (viii) to (xiii): 26 represents a monovalent group represented by any one of the following formulae (viii) to (xiii): d represents a number of 135 or more and 1350 or less, and e represents a number of 3 or more and 57 or less. [ka] [ka] In the above general formula (4), R 1 and n is the same as above.

[0034] The modified organopolysiloxane (raw material polysiloxane) represented by the general formula (3) has a functional group equivalent weight of preferably 5,000 or more and 30,000 or less, more preferably 10,000 or more and 28,000 or less, and even more preferably 15,000 or more and 25,000 or less, and a weight average molecular weight of preferably 10,000 or more and 200,000 or less, more preferably 50,000 or more and 150,000 or less, and even more preferably 80,000 or more and 120,000 or less.

[0035] The ring-opening polymerization of the cyclic iminoether represented by the general formula (4) can be carried out, for example, according to the method described in Liebigs Ann. Chem., pp. 996-1009 (1974). The polymerization initiator can be a compound with strong electrophilic reactivity, such as an alkyl ester of a strong acid, such as an alkyl benzenesulfonate, an alkyl p-toluenesulfonate, an alkyl trifluoromethanesulfonate, an alkyl trifluoroacetate, or a dialkyl sulfate, with dialkyl sulfate being preferred. The amount of polymerization initiator used is usually 1 mole per 2 to 100 moles of the cyclic iminoether represented by the general formula (4). Examples of polymerization solvents that can be used in ring-opening polymerization include acetates such as ethyl acetate and propyl acetate; ethers such as diethyl ether, diisopropyl ether, dioxane, and tetrahydrofuran; ketones such as acetone and methyl ethyl ketone; halogenated solvents such as chloroform and methylene chloride; nitrile solvents such as acetonitrile and benzonitrile; and aprotic polar solvents such as N,N-dimethylformamide, N,N-dimethylacetamide, and dimethyl sulfoxide. Of these, acetates are preferred. The amount of solvent used is usually 20 to 2,000 parts by mass per 100 parts by mass of the cyclic iminoether represented by the general formula (4) above. The polymerization temperature in the ring-opening polymerization is usually 30 to 170°C, preferably 40 to 150°C, and the polymerization time varies depending on the polymerization temperature and the like, but is usually 1 to 60 hours.

[0036] When a 2-substituted-2-oxazoline is used as the cyclic iminoether represented by the general formula (4), a poly(N-acylethyleneimine) (corresponding to n=2 in the general formula (1)) is obtained, and when a 2-substituted-dihydro-2-oxazine is used, a poly(N-acylpropyleneimine) (corresponding to n=3 in the general formula (1)) is obtained. The number average molecular weight of the terminally reactive poly(N-acylalkyleneimine) is preferably 1,000 to 4,000, more preferably 1,500 to 3,500, and even more preferably 2,000 to 3,000.

[0037] In producing component (A), the preferred method for linking the poly(N-acylalkyleneimine) and organopolysiloxane segments is to react a terminally reactive poly(N-acylalkyleneimine) obtained by living polymerization of the cyclic iminoether shown in general formula (4) with a modified organopolysiloxane shown in general formula (3). This method makes it easy to control the degree of polymerization by adjusting the molecular weight of the cyclic iminoether and the amount of polymerization initiator used, as shown in theoretical formula (III) below (Mwi; molecular weight of poly(N-acylpropyleneimine)), and also produces a nearly monodisperse poly(N-acylalkyleneimine) with a narrower molecular weight distribution than conventional radical polymerization. Mwi = (number of moles of cyclic imino ether) / (number of moles of polymerization initiator) × (molecular weight of cyclic imino ether) + molecular weight of polymerization initiator (III)

[0038] When the modified organopolysiloxane (raw material polysiloxane) is an organopolysiloxane containing an amino group, the reaction between the modified organopolysiloxane and the reactive terminal of the poly(N-acylalkyleneimine) obtained by living polymerization of a cyclic iminoether can be carried out, for example, as follows. First, a polymerization initiator is dissolved in a polar solvent (preferably acetonitrile, valeronitrile, dimethylformamide, dimethylacetamide, chloroform, methylene chloride, ethylene chloride, ethyl acetate, methyl acetate, or the like, alone, or optionally mixed with other solvents), and the temperature is raised to 40 to 150°C, preferably 60 to 100°C. The cyclic iminoether represented by general formula (4) is then added all at once, or, if the reaction is vigorous, added dropwise, to carry out polymerization. The progress of the polymerization can be monitored by quantifying the remaining amount of the cyclic iminoether monomer using an analytical instrument such as gas chromatography. Even after the cyclic iminoether is consumed and polymerization is completed, the active species at the growing end remain reactive. Without isolating the polymer, this polymer solution is subsequently mixed with an organopolysiloxane containing amino groups, and the reaction is carried out at 5 to 100°C, preferably 20 to 60°C. The mixing ratio of the amino group-containing organopolysiloxane can be selected appropriately, but it is preferable to react 0.1 to 1.3 molar equivalents of poly(N-acylalkyleneimine) per mole of amino group in the organopolysiloxane. Through the above reaction, a block copolymer or graft polymer in which poly(N-acylalkyleneimine) segments are bonded to polydimethylsiloxane can be obtained.

[0039] Specific examples of component (A) obtainable by the above method include poly(N-formylethyleneimine)organosiloxane, poly(N-acetylethyleneimine)organosiloxane, and poly(N-propionylethyleneimine)organosiloxane. The component (A) can be used alone or in combination of two or more.

[0040] (Component (B): Cationic polymer) Component (B) is a cationic polymer that can form a polyion complex through interaction with component (C). Note that when component (A) is a cationic polymer, component (A) is excluded. In other words, when component (A) is a cationic polymer, the cationic polymer of component (A) is not included in component (B). The cationic polymer of component (B) is preferably a polymer having cationic groups and a positive net charge. Component (B) may have anionic groups, nonionic groups, or amphoteric groups such as betaine groups in addition to the cationic groups, as long as the effects of the present invention are not impaired. In this specification, the cationic group refers to a cationic group or a group that can be ionized to become a cationic group, and specific examples thereof include a primary amino group, a secondary amino group, a tertiary amino group, and a quaternary ammonium group. The anionic group is an anionic group or a group that can be ionized to become an anionic group, and specifically includes at least one selected from the group consisting of acidic groups such as a carboxy group, a sulfonic acid group, and a phosphate group, preferably at least one selected from a carboxy group and a sulfonic acid group, more preferably a carboxy group. At least a portion of the anionic group may be neutralized and in the form of a salt.

[0041] The viscosity of a 1% by mass aqueous solution of component (B) at 30°C is preferably 1,000 mPa·s or more, more preferably 1,300 mPa·s or more, even more preferably 1,500 mPa·s or more, still more preferably 1,700 mPa·s or more, and even more preferably 1,800 mPa·s or more, from the viewpoints of exhibiting an effect of inhibiting fading after dyeing of hair or fibers for head accessories and improving the durability of that effect. There is no particular upper limit to the viscosity, but from the viewpoints of ease of formation of a polyion complex and handleability, it is preferably 100,000 mPa·s or less, more preferably 50,000 mPa·s or less, even more preferably 30,000 mPa·s or less, still more preferably 10,000 mPa·s or less, and even more preferably 5,000 mPa·s or less. The viscosity of a 1% by mass aqueous solution of component (B) at 30° C. can be measured using a Brookfield viscometer (TV-20, manufactured by Toki Sangyo Co., Ltd.).

[0042] The cationic charge density of component (B) is preferably 0.1 mmol / g or more, more preferably 0.2 mmol / g or more, even more preferably 0.3 mmol / g or more, and still more preferably 0.5 mmol / g or more, from the viewpoint of facilitating the formation of a polyion complex through interaction with component (C), and from the viewpoint of exhibiting an inhibitory effect on fading of hair or fibers for head accessories after dyeing and improving the durability of this effect, and is preferably 20 mmol / g or less, more preferably 10 mmol / g or less, even more preferably 7.0 mmol / g or less, still more preferably 4.0 mmol / g or less, still more preferably 2.0 mmol / g or less, and still more preferably 1.5 mmol / g or less.

[0043] The cationic charge density of component (B) is the number of moles of cationic groups contained per gram of polymer. When at least a portion of the cationic groups of component (B) are in the form of neutralized salts, the number of moles of cationic groups mentioned above includes the number of moles of cationic groups in the form of salts. Two or more polymers may be used as component (B). In this case, the cationic charge density of component (B) is determined by calculating a weighted average from the cationic charge density and blending amount of each polymer.

[0044] As component (B), any of natural polymers such as cationized polysaccharides or cationized products thereof, and synthetic polymers can be used, but from the viewpoint of easy availability, synthetic polymers are preferred. Specific examples of polymers usable as component (B) include cationized polyvinyl alcohol, polyethyleneimine, methacryloylethyltrimethylammonium salt polymers, quaternized dialkylaminoalkyl(meth)acrylate polymers, diallyl quaternized ammonium salt polymers, methacrylamidepropyltrimethylammonium salt polymers, vinylimidazolium trichloride-vinylpyrrolidone copolymer (polyquaternium-16), vinylpyrrolidone-alkylamino(meth)acrylate copolymers, vinylpyrrolidone-alkylamino(meth)acrylate-vinylcaprolactam copolymers, alkylacrylamide-(meth)acrylate-alkylaminoalkylacrylamide-polyethylene glycol(meth)acrylate copolymers, and adipic acid-dimethylaminohydroxypropylethylenetriamine copolymers. One or more of these may be used. In this specification, "(meth)acrylic acid" refers to either acrylic acid or methacrylic acid, and "(meth)acrylate" refers to either acrylate or methacrylate.

[0045] Among the above, examples of methacryloylethyltrimethylammonium salt polymers include methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-methoxypolyethylene glycol methacrylate copolymer (Polyquaternium-49), and methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-2-hydroxyethyl methacrylate copolymer (Polyquaternium-48).

[0046] Examples of quaternized dialkylaminoalkyl (meth)acrylate polymers include vinylpyrrolidone-N,N-dimethylaminoethyl diethyl methacrylate sulfate copolymer (Polyquaternium-11) and N,N-dimethylaminoethyl diethyl methacrylate sulfate-N,N-dimethylacrylamide-polyethylene glycol dimethacrylate copolymer (Polyquaternium-52).

[0047] Examples of diallyl quaternized ammonium salt polymers include dimethyldiallylammonium chloride polymer (Polyquaternium-6), dimethyldiallylammonium chloride-acrylic acid copolymer (Polyquaternium-22), dimethyldiallylammonium chloride-acrylamide copolymer (Polyquaternium-7), and acrylamide-acrylic acid-dimethyldiallylammonium chloride copolymer (Polyquaternium-39).

[0048] Examples of methacrylamide propyl trimethyl ammonium salt polymers include methacrylamide propyl trimethyl ammonium chloride polymer, vinylpyrrolidone-methacrylamidopropyl trimethyl ammonium chloride copolymer, acrylic acid-methyl acrylate-methacrylamidopropyl trimethyl ammonium chloride copolymer (Polyquaternium-47), and acrylic acid-acrylamide-methacrylamidopropyl trimethyl ammonium chloride copolymer (Polyquaternium-53).

[0049] From the viewpoint of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect, component (B) is preferably a polymer containing a structural unit represented by the following general formula (I): [ka] (In the formula, R 11 is a hydrogen atom or a methyl group, and R 12 ~R 14 are each independently an alkyl group having 1 to 4 carbon atoms; X is -O- or -NH-; and m1 is a number of 1 to 4.

[0050] R in general formula (I) 11 is preferably a methyl group, and R 12 ~R 14 are each independently preferably an alkyl group having 1 to 3 carbon atoms, more preferably a methyl group or an ethyl group, and even more preferably a methyl group. In the general formula (I), X is preferably —O—, and m1 is preferably 1 or more and 3 or less, more preferably 2 or more and 3 or less.

[0051] Examples of the structural unit represented by general formula (I) include one or more structural units selected from the group consisting of structural units derived from methacryloylethyltrimethylammonium salts, structural units derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate, and structural units derived from methacrylamidepropyltrimethylammonium salts, and preferably one or more structural units selected from the group consisting of structural units derived from methacryloylethyltrimethylammonium salts and structural units derived from N,N-dimethylaminoethyl methacrylate diethyl sulfate.

[0052] Component (B) may be a polymer containing other structural units in addition to the structural unit represented by general formula (I). Examples of such other structural units include structural units derived from vinyl monomers such as vinylpyrrolidone, amphoteric monomers such as (meth)acryloylethyldimethylbetaine, alkyl (meth)acrylates, hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, and acrylamides such as N,N-dimethylacrylamide. Component (A) may also be a crosspolymer crosslinked with polyethylene glycol di(meth)acrylate or the like.

[0053] In component (B), the content of the structural unit represented by the general formula (I) is preferably 10 mol % or more and 100 mol % or less of all structural units constituting component (B), from the viewpoint of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect.

[0054] Component (B) can be used alone or in combination of two or more. Among the above, from the viewpoint of exhibiting the effect of inhibiting fading after dyeing of hair or fibers for head accessories and improving the durability of the effect, component (B) is preferably one or more selected from the group consisting of methacryloylethyltrimethylammonium salt polymers and quaternized dialkylaminoalkyl(meth)acrylate polymers, more preferably methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride-methoxypolyethylene glycol methacrylate copolymer (Polyquaternium-49), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-50), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-51), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-52), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-53), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-54), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-55), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-56), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-57), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-58), methacryloylethyldimethylbetaine-methacryloylethyltrimethylammonium chloride copolymer (Polyquaternium-59), methacryloylethyldimethylbetaine-methacryloylethyltri The copolymer is preferably at least one selected from the group consisting of methacryloylethyltrimethylammonium chloride / 2-hydroxyethyl methacrylate copolymer (Polyquaternium-48), and N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer (Polyquaternium-52), more preferably at least one selected from the group consisting of methacryloylethyltrimethylammonium chloride polymer (Polyquaternium-37) and N,N-dimethylaminoethyl diethyl methacrylate sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer (Polyquaternium-52).

[0055] Commercially available polymers can also be used as component (B), including, for example, "Cosmedia Ultragel 300" (Polyquaternium-37, cationic charge density: 4.81 mmol / g) manufactured by BASF Japan Ltd., and "SOFCARE KG-101W-E" (Polyquaternium-52, cationic charge density: 0.83 mmol / g) and "SOFCARE KG-301W" (Polyquaternium-52, cationic charge density: 1.84 mmol / g) manufactured by Kao Corporation.

[0056] (Component (C): Anionic Polymer) Component (C) is a polymer capable of forming a polyion complex through interaction with component (B). As used herein, "anionic polymer" refers to a polymer that has anionic groups and is substantially free of cationic groups and amphoteric groups. "Substantially free of cationic groups and amphoteric groups" means that the molar ratio of cationic groups and amphoteric groups to anionic groups is preferably 0.1% or less.

[0057] The anionic group contained in component (C) is preferably an acidic group such as a carboxyl group, a sulfonic acid group, or a phosphate group, and is more preferably a carboxyl group from the viewpoint of facilitating the formation of a polyion complex through interaction with component (B) and from the viewpoint of availability. Note that in component (C), at least a portion of the anionic group may be neutralized and in the form of a salt.

[0058] <Component (C1): Crosslinked polymer containing structural units derived from (meth)acrylic acid, anionic polysaccharide> From the viewpoint of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect, component (C) preferably contains one or more members selected from the group consisting of (C1) crosslinked polymers containing structural units derived from (meth)acrylic acid and anionic polysaccharides.

[0059] Among the components (C1), crosslinked polymers containing structural units derived from (meth)acrylic acid include homopolymers or copolymers of (meth)acrylic acid, or salts thereof, each having a crosslinked structure. The crosslinked structure referred to here means a three-dimensional network structure in which polymer chains, which are the main structure of the polymer, are linked within or between polymer chains. The method for forming the crosslinked structure is not particularly limited, and examples include those formed by methods in which crosslinking is performed simultaneously with polymerization, such as polycondensation or radical polymerization, or methods in which polymer chains are crosslinked later. Examples of the homopolymer of (meth)acrylic acid include polyacrylic acid, polymethacrylic acid, and salts thereof. Examples of the copolymer of (meth)acrylic acid include (meth)acrylic acid / maleic acid copolymer, (meth)acrylic acid / itaconic acid copolymer, (meth)acrylic acid / fumaric acid copolymer, (meth)acrylic acid / vinyl acetate copolymer, (meth)acrylic acid / (meth)acrylic acid alkyl ester copolymer, (meth)acrylic acid / 2-hydroxyethyl methacrylate copolymer, acrylic acid / acrylic acid alkyl ester / (N-alkyl)acrylamide copolymer, and salts thereof, and one or more of these may be used. Among the above, the (meth)acrylic acid copolymer is preferably a (meth)acrylic acid / (meth)acrylic acid alkyl ester, and more preferably an acrylic acid / acrylic acid alkyl ester. The (meth)acrylic acid alkyl ester includes a (meth)acrylic acid alkyl ester having an alkyl carbon number of preferably 1 or more, more preferably 4 or more, and even more preferably 8 or more, and preferably 40 or less, more preferably 36 or less, and even more preferably 32 or less.

[0060] Specific examples of crosslinked polymers containing structural units derived from (meth)acrylic acid include carboxyvinyl polymers or salts thereof, (acrylates / C10-30 alkyl acrylate) crosspolymers, (sodium acrylate / acryloyldimethyltaurine / dimethylacrylamide) crosspolymers, and acrylates crosspolymer-4.

[0061] Among the component (C1), the anionic polysaccharides include polysaccharides having a carboxy group (hyaluronic acid, alginic acid, pectinic acid, carboxymethylcellulose, xanthan gum, etc.), polysaccharide sulfates (carrageenan, keratan sulfate, dermatan sulfate, sulfated starch, heparin, heparan sulfate), and salts thereof, and one or more of these can be used. Among the above, from the viewpoint of exhibiting a discoloration suppression effect after dyeing of hair or fibers for head accessories and improving the durability of this effect, the anionic polysaccharide is preferably a polysaccharide having a carboxy group or a salt thereof, more preferably alginic acid, carboxymethyl cellulose, or a salt thereof, and even more preferably alginic acid or a salt thereof.

[0062] When component (C1) is a salt, examples of the salt include alkali metal salts such as sodium salts and potassium salts, and alkaline earth metal salts, and from the viewpoint of availability, alkali metal salts are preferred.

[0063] Among the above, from the viewpoint of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect, component (C1) is preferably one or more selected from the group consisting of carboxyvinyl polymers, (acrylates / C10-30 alkyl acrylate) crosspolymers, and anionic polysaccharides, more preferably anionic polysaccharides or salts thereof, and even more preferably alginic acid or salts thereof.

[0064] The anionic charge density of component (C1) is not particularly limited, but from the viewpoint of facilitating the formation of a polyion complex through interaction with component (B), and from the viewpoint of exerting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect, it is preferably 1.0 mmol / g or more, more preferably 2.0 mmol / g or more, even more preferably 3.5 mmol / g or more, and is preferably 25 mmol / g or less, more preferably 20 mmol / g or less, even more preferably 15 mmol / g or less. The anionic charge density of component (C1) is the number of moles of anionic groups contained per gram of polymer. If at least a portion of the anionic groups of component (C1) are in the form of neutralized salts, the number of moles of anionic groups mentioned above includes the number of moles of anionic groups in the form of salts. Two or more polymers may be used as component (C1). In this case, the anionic charge density of component (C1) is determined by calculating a weighted average from the anionic charge density and blending amount of each polymer.

[0065] When component (C1) is an anionic polysaccharide, its weight-average molecular weight (Mw) is preferably at least 2,000, more preferably at least 10,000, even more preferably at least 100,000, even more preferably at least 500,000, and even more preferably at least 1,000,000, from the viewpoint of improving film-forming ability. Furthermore, from the viewpoint of facilitating the formation of a polyion complex through interaction with component (B), and from the viewpoint of exerting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect, it is preferably at most 3,500,000, more preferably at most 3,000,000. The weight average molecular weight of the component (C1) can be measured by gel permeation chromatography (GPC).

[0066] The content of component (C1) in component (C) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, and still more preferably 80% by mass or more, but 100% by mass or less, from the viewpoints of improving film-forming ability, facilitating the formation of a polyion complex through interaction with component (B), and exerting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and improving the durability of this effect.

[0067] <Component (C2): Anionic polymer other than component (C1)> Component (C) may further contain (C2) an anionic polymer other than component (C1), in order to exert an effect of inhibiting fading of hair or fibers for head accessories after dyeing and to improve the durability of this effect. When the composition of the present invention further contains a nonionic polymer (D) described below, it is believed that component (C2) forms a hydrogen bond with the nonionic polymer (D) complexed with the crosslinked structure in the polyion complex formed by components (B) and (C1), thereby immobilizing component (D) within the crosslinked structure. This effect is thought to make it easier for component (D) to remain in the film without being washed away even when rinsing or washing is performed after dyeing hair or fibers for head accessories with the composition of the present invention, thereby improving the durability of the color fading suppression effect.

[0068] The molecular weight of component (C2) is preferably 1,000 or more, more preferably 2,000 or more, even more preferably 5,000 or more, and even more preferably 10,000 or more, from the viewpoints of contributing to the fixation of component (D), exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing, and further improving the durability of this effect, and is preferably 50,000 or less, more preferably 40,000 or less, and even more preferably 30,000 or less. The term "molecular weight" used herein means the weight average molecular weight, which can be measured by gel permeation chromatography (GPC).

[0069] Component (C2) is preferably a polymer having a carboxy group and a molecular weight of 1,000 or more and 50,000 or less, and more preferably a non-crosslinked polymer having a molecular weight of 2,000 or more and 30,000 or less and containing a structural unit derived from (meth)acrylic acid. Examples of non-crosslinked polymers containing structural units derived from (meth)acrylic acid that are suitable for use as component (C2) include poly(meth)acrylic acid, as well as (meth)acrylic acid / maleic acid copolymers, (meth)acrylic acid / itaconic acid copolymers, (meth)acrylic acid / fumaric acid copolymers, (meth)acrylic acid / vinyl acetate copolymers, (meth)acrylic acid / (meth)acrylic acid alkyl ester copolymers, (meth)acrylic acid / 2-hydroxyethyl methacrylate copolymers, acrylic acid / acrylic acid alkyl ester / (N-alkyl)acrylamide copolymers, and salts thereof, and one or more of these may be used. Other polymers having a carboxy group that are suitable for use as component (C2) include polymaleic acid, maleic acid / diisobutylene copolymers, maleic acid / styrene copolymers, benzoic acid formaldehyde condensates, benzoic acid / phenol / formaldehyde condensates, and salts thereof.

[0070] Among the above, from the viewpoint of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing and further improving the durability of this effect, component (C2) is preferably one or more selected from the group consisting of poly(meth)acrylic acid, (meth)acrylic acid / (meth)acrylic acid alkyl ester copolymer, and salts thereof.

[0071] Examples of poly(meth)acrylic acid or a salt thereof include polyacrylic acid, polymethacrylic acid, and salts thereof, with polyacrylic acid or a salt thereof being preferred. The (meth)acrylic acid / (meth)acrylic acid alkyl ester copolymer or its salt is more preferably an acrylic acid / acrylic acid alkyl ester or its salt. The (meth)acrylic acid alkyl ester includes a (meth)acrylic acid alkyl ester having an alkyl carbon number of preferably 1 or more, more preferably 4 or more, even more preferably 8 or more, still more preferably 12 or more, and preferably 40 or less, more preferably 36 or less, even more preferably 32 or less, and still more preferably 24 or less. The (meth)acrylic acid / (meth)acrylic acid alkyl ester is preferably an acrylic acid / acrylic acid alkyl ester, more preferably one or more selected from the group consisting of an (acrylic acid / octyl acrylate) copolymer and an (acrylic acid / stearyl acrylate) copolymer, and even more preferably an (acrylic acid / stearyl acrylate) copolymer.

[0072] When component (C2) is a salt, examples of the salt include alkali metal salts such as sodium salts and potassium salts, and alkaline earth metal salts, and from the viewpoint of availability, alkali metal salts are preferred.

[0073] (Component (D): Nonionic polymer) The composition of the present invention preferably further contains a nonionic polymer as component (D) in order to exert a color fading-inhibiting effect on hair or headwear fibers after dyeing, further improve the durability of the effect, and improve the moist feeling after drying. It is believed that the use of component (D) reinforces the rigid crosslinked structure of the polyion complex formed by components (B) and (C) through the complexation with the long-chain, flexible, non-crosslinked structure of component (D). Furthermore, because hydrogen bonding is possible between components (C) and (D), it is believed that component (D) is held within the crosslinked structure by component (C), forming a stronger network within the coating. As a result, it is believed that the texture-improving effect, the durability of the effect, and the moisture resistance of the treated object are further improved. As used herein, the term "nonionic polymer" refers to a polymer that is substantially free of ionic groups, such as cationic groups, anionic groups, and amphoteric groups.

[0074] Examples of component (D) include polyalkylene glycol or a derivative thereof, a polymer containing a structural unit derived from vinylpyrrolidone, a polymer containing a structural unit derived from a (meth)acrylic acid ester, polyvinyl alcohol, polyacrylamide, polycaprolactam, and the like, and one or more of these can be used.

[0075] Examples of polyalkylene glycols include homopolymers or copolymers of alkylene glycols having an alkylene carbon number of 2 to 6, preferably 2 to 4, and more preferably 2 to 3. Specific examples include polyethylene glycol, polypropylene glycol, polytrimethylene ether glycol, polytetramethylene ether glycol, polyethylene glycol-polypropylene glycol copolymer (polyoxyethylene polyoxypropylene glycol), polyethylene glycol-polytrimethylene ether glycol copolymer, polyethylene glycol-polytetramethylene ether glycol copolymer, and polypropylene glycol-polytetramethylene ether glycol copolymer. Among these, from the viewpoints of exerting the effect of inhibiting fading after dyeing of hair or fibers for head accessories and further improving the durability of this effect, and from the viewpoints of improving the moist feeling after drying, preferred are one or more selected from the group consisting of polyethylene glycol, polypropylene glycol, and polyethylene glycol-polypropylene glycol copolymer, and more preferred are one or more selected from the group consisting of polyethylene glycol and polyethylene glycol-polypropylene glycol copolymer.

[0076] Examples of polyalkylene glycol derivatives include terminally modified products of the above-mentioned polyalkylene glycols, such as polyalkylene glycol monoalkyl ethers, polyalkylene glycol dialkyl ethers, polyalkylene glycol monoaryl ethers, polyalkylene glycol diaryl ethers, polyalkylene glycol mono-fatty acid esters, polyalkylene glycol di-fatty acid esters, polyalkylene glycol diglycidyl ethers, etc. Among these, from the viewpoints of exerting an effect of inhibiting fading after dyeing of hair or fibers for head accessories and further improving the durability of this effect, and from the viewpoints of improving moist feeling after drying, preferred are one or more selected from the group consisting of polyalkylene glycol monoalkyl ethers, polyalkylene glycol di-alkyl ethers, polyalkylene glycol mono-fatty acid esters, and polyalkylene glycol di-fatty acid esters, and more preferred are one or more selected from the group consisting of polyalkylene glycol mono-fatty acid esters and polyalkylene glycol di-fatty acid esters. The number of carbon atoms in the alkyl group in the mono- or di-alkyl ether of polyalkylene glycol and the number of carbon atoms in the fatty acid in the mono- or di-fatty acid ester of polyalkylene glycol are preferably 1 or more and 36 or less, more preferably 4 or more and 32 or less, even more preferably 8 or more and 24 or less, and still more preferably 12 or more and 22 or less. The number of carbon atoms in the aryl group in the mono- or diaryl ether of polyalkylene glycol is preferably 6 or more and 36 or less, more preferably 6 or more and 32 or less, even more preferably 6 or more and 24 or less, and still more preferably 6 or more and 22 or less.

[0077] Specific examples of polyalkylene glycol derivatives include polyethylene glycol monomethyl ether, polyethylene glycol dimethyl ether, polyethylene glycol monobutyl ether, polyethylene glycol dibutyl ether, polyethylene glycol monooctyl ether, polyethylene glycol monodecyl ether, polyethylene glycol monododecyl ether, polyethylene glycol monotridecyl ether, polyethylene glycol-bisphenol A ether, polyethylene glycol dilaurate (polyethylene glycol dilaurate), polyethylene glycol distearate (polyethylene glycol distearate), polyethylene glycol diglycidyl ether, polyethylene glycol-polypropylene glycol-monomethyl ether, and polyethylene glycol-polypropylene glycol-dimethyl ether. 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 dilaurate-polypropylene glycol, polyethylene glycol distearate-polypropylene glycol, polyethylene glycol-polypropylene glycol-diglycidyl ether, and the like, and one or more of these may be used.

[0078] Examples of polymers containing structural units derived from vinylpyrrolidone include homopolymers of vinylpyrrolidone and copolymers of vinylpyrrolidone and nonionic monomers, such as polyvinylpyrrolidone, vinylpyrrolidone / vinyl acetate copolymers, and vinylpyrrolidone / methacrylamide / vinylimidazole copolymers.

[0079] Examples of polymers containing structural units derived from (meth)acrylic acid esters include homopolymers of (meth)acrylic acid esters and copolymers of (meth)acrylic acid esters with nonionic monomers such as (meth)acrylamide, dimethylacrylamide, vinyl acetate, vinyl methyl ether, etc. Examples of (meth)acrylic acid esters include the above-mentioned (meth)acrylic acid alkyl esters, as well as (meth)acrylic acid hydroxyalkyl esters and (meth)acrylic acid alkyl ethers. Specific examples of polymers containing structural units derived from (meth)acrylic acid esters include (dimethylacrylamide / hydroxyethyl acrylate / methoxyethyl acrylate) copolymers and (hydroxyethyl acrylate / methoxyethyl acrylate) copolymers.

[0080] Among the above, from the viewpoint of exerting the effect of inhibiting discoloration after dyeing of hair or fibers for head accessories and further improving the durability of this effect, and from the viewpoint of improving the moist feeling after drying, component (D) is preferably one or more selected from the group consisting of polyalkylene glycols or derivatives thereof, and polymers containing structural units derived from vinylpyrrolidone, more preferably one or more selected from the group consisting of polyethylene glycol, polypropylene glycol, polyethylene glycol-polypropylene glycol copolymers, mono- or di-fatty acid esters thereof, and polyvinylpyrrolidone, and even more preferably one or more selected from the group consisting of polyethylene glycol, polyethylene glycol-polypropylene glycol copolymers, mono- or di-fatty acid esters thereof, and polyvinylpyrrolidone.

[0081] The weight-average molecular weight (Mw) of component (D) is preferably 2,000 or more, more preferably 5,000 or more, even more preferably 10,000 or more, from the viewpoints of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing, further improving the durability of this effect, and improving the moist feeling after drying, and is preferably 2,000,000 or less, more preferably 1,000,000 or less, even more preferably 100,000 or less, and even more preferably 50,000 or less. The weight average molecular weight of component (D) can be measured by gel permeation chromatography (GPC).

[0082] (Component (E): Cationic surfactant) From the viewpoint of further improving the feel of the object to be treated, the composition of the present invention preferably contains a cationic surfactant as component (E). Examples of the cationic surfactant include (i) alkyltrimethylammonium salts, (ii) alkoxyalkyltrimethylammonium salts, (iii) dialkyldimethylammonium salts, (iv) alkylamidoalkyltrimethylammonium salts, (v) alkyldimethylamines and salts thereof, (vi) alkoxyalkyldimethylamines and salts thereof, and (vii) alkylamidoalkyldimethylamines and salts thereof.

[0083] (i) Examples of alkyltrimethylammonium salts include alkyltrimethylammonium salts having an alkyl group preferably having from 12 to 24 carbon atoms, more preferably from 16 to 24 carbon atoms. Specific examples include cetyltrimethylammonium chloride (cetrimonium chloride), stearyltrimethylammonium chloride (steartrimonium chloride), and behenyltrimethylammonium chloride (behentrimonium chloride). (ii) Examples of alkoxyalkyltrimethylammonium salts include alkoxyalkyltrimethylammonium salts having an alkoxy group preferably having from 12 to 22 carbon atoms, more preferably from 16 to 20 carbon atoms. Specific examples include stearoxypropyltrimethylammonium chloride, stearoxyethyltrimethylammonium chloride, and stearoxyhydroxypropyltrimethylammonium chloride. (iii) Examples of dialkyldimethylammonium salts include dialkyldimethylammonium salts having an alkyl group preferably having 12 to 22 carbon atoms, more preferably 16 to 20 carbon atoms, and specific examples thereof include distearyldimethylammonium chloride. (iv) Examples of alkylamidoalkyltrimethylammonium salts include alkylamidoalkyltrimethylammonium salts having preferably an alkyl group having 11 to 21 carbon atoms, more preferably 13 to 19 carbon atoms, and specific examples thereof include palmitamidopropyltrimethylammonium chloride (palmitamidopropyltrimonium chloride).

[0084] (v) Alkyldimethylamine, (vi) alkoxyalkyldimethylamine, and (vii) alkylamidoalkyldimethylamine react with an acid to form a tertiary amine salt, which becomes a cationic surfactant. The alkyl group in (v) alkyldimethylamine and salts thereof, and the alkoxy group in (vi) alkoxyalkyldimethylamine and salts thereof are preferably alkyl groups having 12 to 22 carbon atoms, more preferably 16 to 20 carbon atoms. (vii) The alkyl group of the alkylamide moiety in the alkylamido alkyldimethylamine and its salt is preferably an alkyl group having 11 or more and 21 or less carbon atoms, more preferably 15 or more and 19 or less carbon atoms.

[0085] The content or blending amount of the ammonium salts (i) to (iv) does not include counter ions such as chloride ions, but refers to the content of ammonium cations only. The amines (v) to (vii) may be reacted with an acid in advance to form a salt and then incorporated into the composition. Alternatively, the amines may be incorporated into the composition as they are, and then an acid may be incorporated into the composition to form a salt therein. Therefore, the above amines and their salts are defined herein as cationic surfactants. The content or amount of the amines is calculated in terms of the mass of the amine. Examples of the amine salts (v) to (vii) include salts with organic or inorganic acids. Examples of organic acids include monocarboxylic acids such as acetic acid and propionic acid; dicarboxylic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, and phthalic acid; polycarboxylic acids such as polyglutamic acid; hydroxycarboxylic acids such as glycolic acid, lactic acid, hydroxyacrylic acid, glyceric acid, malic acid, tartaric acid, and citric acid; and acidic amino acids such as glutamic acid and aspartic acid. Examples of inorganic acids include hydrochloric acid, sulfuric acid, and phosphoric acid. Among these, organic acids are preferred, and one or more selected from the group consisting of dicarboxylic acids, hydroxycarboxylic acids, and acidic amino acids are more preferred. The dicarboxylic acid is more preferably one or more selected from the group consisting of maleic acid and succinic acid. The hydroxycarboxylic acid is more preferably one or more selected from the group consisting of glycolic acid, lactic acid, and malic acid. The acidic amino acid is more preferably glutamic acid.

[0086] (v) Examples of alkyldimethylamines and salts thereof include N,N-dimethylbehenylamine, N,N-dimethylstearylamine, and organic acid salts thereof, with N,N-dimethylbehenylamine lactate and N,N-dimethylstearylamine glycolate being preferred.

[0087] (vi) Examples of alkoxyalkyldimethylamines and salts thereof include N,N-dimethyl-3-hexadecyloxypropylamine, N,N-dimethyl-3-octadecyloxypropylamine, and organic acid salts thereof, and N,N-dimethyl-3-hexadecyloxypropylamine or a lactate thereof, and N,N-dimethyl-3-octadecyloxypropylamine (stearoxypropyldimethylamine) or a lactate thereof are preferred.

[0088] (vii) Examples of alkylamidoalkyldimethylamines and salts thereof include N-[3-(dimethylamino)propyl]docosanamide, N-[3-(dimethylamino)propyl]stearamide, and organic acid salts thereof, and preferred are the lactate salt of N-[3-(dimethylamino)propyl]docosanamide and the glycolate salt of N-[3-(dimethylamino)propyl]stearamide.

[0089] The component (E) can be used alone or in combination of two or more. Among the above, from the viewpoint of further improving the feel of the treated object, component (E) is preferably at least one selected from the group consisting of (i) alkyltrimethylammonium salts, (ii) alkoxyalkyltrimethylammonium salts, (iii) dialkyldimethylammonium salts, (iv) alkylamidoalkyltrimethylammonium salts, (v) alkyldimethylamines and salts thereof, (vi) alkoxyalkyldimethylamines and salts thereof, and (vii) alkylamidoalkyldimethylamines and salts thereof, and more preferably at least one selected from the group consisting of (i) alkyltrimethylammonium salts and (vi) alkoxyalkyldimethylamines and salts thereof. more preferably, it is at least one selected from the group consisting of cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, N,N-dimethyl-3-hexadecyloxypropylamine or a lactate thereof, and N,N-dimethyl-3-octadecyloxypropylamine (stearoxypropyldimethylamine) or a lactate thereof; and even more preferably, it is at least one selected from the group consisting of behenyltrimethylammonium chloride and N,N-dimethyl-3-octadecyloxypropylamine (stearoxypropyldimethylamine) or a lactate thereof.

[0090] (Component (F): Higher alcohol) From the viewpoint of further improving the feel of the object to be treated, the composition of the present invention preferably contains a higher alcohol as component (F). Examples of higher alcohols include aliphatic monohydric alcohols having 12 or more carbon atoms, preferably 12 to 22 carbon atoms. Examples of such higher alcohols include one or more selected from the group consisting of lauryl alcohol, myristyl alcohol, cetyl alcohol, oleyl alcohol, stearyl alcohol, isostearyl alcohol, 2-octyldodecanol, behenyl alcohol, and cetostearyl alcohol (cetearyl alcohol). Among the above, from the viewpoint of further improving the feel of the object to be treated, component (F) is preferably one or more selected from the group consisting of myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and cetearyl alcohol.

[0091] (Component (G): acid) From the viewpoint of stably forming a polyion complex, the composition of the present invention preferably further contains an acid as component (G). Component (G) can be an organic acid or an inorganic acid, and is preferably an organic acid from the viewpoint of use in a hair cosmetic composition or a fiber treatment composition for head accessories. Examples of the organic acid include carboxylic acid compounds and sulfonic acid compounds other than component (C), and are preferably compounds with a molecular weight of 500 or less, more preferably 200 or less.

[0092] Examples of carboxylic acid compounds include aliphatic monocarboxylic acids having 4 or less carbon atoms, such as acetic acid, propionic acid, and butanoic acid; aromatic monocarboxylic acids, such as benzoic acid; aliphatic dicarboxylic acids, such as malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, and fumaric acid; aromatic dicarboxylic acids, such as phthalic acid and isophthalic acid; polycarboxylic acids, such as polyglutamic acid; hydroxycarboxylic acids, such as lactic acid, malic acid, glycolic acid, hydroxyacrylic acid, glyceric acid, tartaric acid, and citric acid; and acidic amino acids, such as glutamic acid and aspartic acid. One or more of these compounds may be used. Examples of sulfonic acid compounds include aliphatic sulfonic acids such as methanesulfonic acid and ethanesulfonic acid; and aromatic sulfonic acids such as p-toluenesulfonic acid and naphthalenesulfonic acid; and one or more of these can be used.

[0093] From the viewpoint of stably forming a polyion complex and forming a highly stable composition, and from the viewpoint of use in a hair cosmetic composition or a fiber treatment composition for headwear, the organic acid is preferably one or more selected from the group consisting of aliphatic dicarboxylic acids, hydroxycarboxylic acids, and aromatic sulfonic acids, more preferably one or more selected from the group consisting of succinic acid, lactic acid, malic acid, glycolic acid, p-toluenesulfonic acid, and naphthalenesulfonic acid, even more preferably one or more selected from the group consisting of succinic acid and lactic acid, and even more preferably lactic acid. At least a part of the organic acid may be in the form of an organic acid salt when blended. From the viewpoints of use in a hair cosmetic composition or a fiber treatment composition for a head accessory product and easy availability, the salt of the organic acid is preferably an alkali metal salt or alkaline metal salt of the organic acid, more preferably an alkali metal salt, still more preferably one or more selected from the group consisting of sodium salts and potassium salts, and even more preferably a sodium salt. From the viewpoints of facilitating the formation of a polyion complex 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, and even more preferably 5% by mass or less, and may be 0% by mass. The proportion (% by mass) of the organic acid salt referred to here means % by mass converted into organic acid.

[0094] (water) The composition of the present invention preferably contains water in order to be an emulsion composition. The water used in the composition of the present invention is preferably deionized water or distilled water. In addition, tap water, groundwater, etc. sterilized with hypochlorous acid or the like may be used as long as the stability of the composition is not impaired.

[0095] (Content) The content or blending amount of each component in the composition of the present invention is preferably as follows, from the viewpoint of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing and further improving the durability of this effect.

[0096] The content of component (A) in the composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.3% by mass or more, from the viewpoints of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing, further improving the durability of the effect, and improving the moist feeling after drying. From the viewpoints of ease of handling and cost reduction, the content is preferably 5.0% by mass or less, more preferably 2.5% by mass or less, and even more preferably 1.0% by mass or less.

[0097] The mass ratio of component (A) to the total amount of component (B) and component (C) in the composition [(A) / ((B)+(C))] is preferably 0.1 or more, more preferably 0.2 or more, even more preferably 0.5 or more, still more preferably 0.7 or more, and still more preferably 0.8 or more, from the viewpoints of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing and further improving the durability of this effect, and of improving the moist feeling after drying, and is preferably 20 or less, more preferably 15 or less, even more preferably 10 or less, and still more preferably 5 or less, from the viewpoints of ease of handling and cost reduction.

[0098] The content of component (B) in the composition is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and even more preferably 0.2% by mass or more, from the viewpoints of ease of formation of a polyion complex, exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and further improving the durability of that effect, and is preferably 3.0% by mass or less, more preferably 2.5% by mass or less, even more preferably 2.0% by mass or less, still more preferably 1.5% by mass or less, still more preferably 1.0% by mass or less, and even more preferably 0.6% by mass or less, from the viewpoint of improving the stability of the composition.

[0099] The content of component (C) in the composition is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.02% by mass or more, and still more preferably 0.025% by mass or more, from the viewpoints of ease of formation of a polyion complex, exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and further improving the durability of that effect, and is preferably 3.0% by mass or less, more preferably 2.0% by mass or less, even more preferably 1.5% by mass or less, still more preferably 1.0% by mass or less, still more preferably 0.5% by mass or less, still more preferably 0.3% by mass or less, still more preferably 0.2% by mass or less, still more preferably 0.1% by mass or less, and still more preferably 0.06% by mass or less, from the viewpoint of improving the stability of the composition.

[0100] The total content of component (B) and component (C) in the composition is preferably 0.015% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.07% by mass or more, still more preferably 0.125% by mass or more, and even more preferably 0.225% by mass or more, from the viewpoint of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing and further improving the durability of that effect. From the viewpoint of improving the stability of the composition, the total content is preferably 6.0% by mass or less, more preferably 4.5% by mass or less, even more preferably 3.5% by mass or less, still more preferably 2.5% by mass or less, still more preferably 1.5% by mass or less, still more preferably 0.9% by mass or less, still more preferably 0.8% by mass or less, and even more preferably 0.7% by mass or less.

[0101] The ratio of the contents of components (B) and (C) contained in the composition is, from the viewpoints of ease of formation of a polyion complex, of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and of further improving the durability of this effect, the mass ratio of component (B) to component (C) [(B) / (C)] is preferably 4.0 or more, more preferably 4.5 or more, even more preferably 5.0 or more, still more preferably 5.5 or more, still more preferably 6.0 or more, still more preferably 6.3 or more, and still more preferably 6.5 or more. From the viewpoint of improving the stability of the composition, it is preferably 20 or less, more preferably 18 or less, even more preferably 16 or less, still more preferably 15 or less, and still more preferably 12 or less. In the composition of the present invention, the mass ratio of component (B) to component (C) has a dominant effect on the effects of the present invention, rather than the cationic charge / anionic charge ratio of component (B) to component (C).

[0102] The ratio of the number of moles of cationic charge of component (B) to the number of moles of anionic charge of component (C) in the composition (cationic charge of component (B) / anionic charge of component (C)) is preferably 10 / 90 to 95 / 5, more preferably 20 / 80 to 95 / 5, even more preferably 25 / 75 to 90 / 10, still more preferably 30 / 70 to 80 / 20, even more preferably 40 / 60 to 80 / 20, even more preferably 50 / 50 to 80 / 20, and even more preferably 52 / 48 to 80 / 20, from the viewpoint of exhibiting an effect of inhibiting fading of hair or fibers for head accessories after dyeing and further improving the durability of that effect.

[0103] The total content of components (A) to (C) in the composition is preferably 0.20% by mass or more, more preferably 0.30% by mass or more, even more preferably 0.40% by mass or more, still more preferably 0.50% by mass or more, still more preferably 0.60% by mass or more, and still more preferably 0.70% by mass or more, from the viewpoints of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing, further improving the durability of the effect, and improving the moist feeling after drying. From the viewpoints of ease of handling and cost reduction, the total content is preferably 10.0% by mass or less, more preferably 8.0% by mass or less, still more preferably 6.0% by mass or less, and still more preferably 5.0% by mass or less.

[0104] When the composition contains component (D), the content of component (D) in the composition is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and still more preferably 0.2% by mass or more, from the viewpoints of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing, further improving the durability of the effect, and improving the moist feeling after drying. From the viewpoint of improving the stability of the composition, the content of component (D) is preferably 3.0% by mass or less, more preferably 2.5% by mass or less, even more preferably 2.0% by mass or less, still more preferably 1.5% by mass or less, still more preferably 1.0% by mass or less, still more preferably 0.8% by mass or less, and still more preferably 0.6% by mass or less.

[0105] When the composition contains component (D), the mass ratio of component (D) to the total amount of components (B) and (C) in the composition [(D) / ((B)+(C))] is, from the viewpoints of exerting the effect of inhibiting fading of hair or fibers for head accessories after dyeing, further improving the durability of the effect, and improving the moist feeling after drying, preferably 0.2 or more, more preferably 0.3 or more, even more preferably 0.4 or more, still more preferably 0.5 or more, still more preferably 0.6 or more, and still more preferably 0.8 or more; and from the viewpoint of improving the stability of the composition, it is preferably 20 or less, more preferably 15 or less, even more preferably 10 or less, still more preferably 8.0 or less, still more preferably 5.0 or less, still more preferably 2.0 or less, still more preferably 1.5 or less, and still more preferably 1.2 or less.

[0106] The total content of components (A) to (D) in the composition is preferably 0.20% by mass or more, more preferably 0.30% by mass or more, even more preferably 0.50% by mass or more, still more preferably 0.60% by mass or more, still more preferably 0.80% by mass or more, and still more preferably 1.0% by mass or more, from the viewpoint of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing, further improving the durability of the effect, and from the viewpoint of improving the moist feeling after drying. Furthermore, from the viewpoint of improving the stability of the composition, the total content is preferably 10.0% by mass or less, more preferably 8.0% by mass or less, even more preferably 5.0% by mass or less, still more preferably 3.0% by mass or less, and still more preferably 2.0% by mass or less.

[0107] When the composition contains component (E), the content of component (E) in the composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and even more preferably 0.5% by mass or more from the viewpoint of further improving the feel of the object to be treated, and is preferably 10% by mass or less, more preferably 5.0% by mass or less, even more preferably 3.5% by mass or less, and even more preferably 2.0% by mass or less from the viewpoint of improving the stability of the composition.

[0108] When the composition contains component (F), the content of component (F) in the composition is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.5% by mass or more, and even more preferably 1.0% by mass or more from the viewpoint of further improving the feel of the treated object, and is preferably 15% by mass or less, more preferably 12% by mass or less, even more preferably 10% by mass or less, and even more preferably 5% by mass or less from the viewpoint of improving the stability of the composition.

[0109] The total content of components (A) to (F) in the composition is preferably 2.0% by mass or more, more preferably 3.0% by mass or more, even more preferably 3.5% by mass or more, still more preferably 3.8% by mass or more, and even more preferably 4.0% by mass or more, from the viewpoints of exhibiting the effect of inhibiting fading of hair or fibers for head accessories after dyeing, further improving the durability of the effect, and improving the moist feeling after drying. Furthermore, from the viewpoint of improving the stability of the composition, the total content is preferably 30.0% by mass or less, more preferably 20.0% by mass or less, even more preferably 10.0% by mass or less, still more preferably 7.0% by mass or less, and even more preferably 5.0% by mass or less.

[0110] When the composition contains component (G), the content of component (G) in the composition is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.03% by mass or more, still more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and still more preferably 0.2% by mass or more, from the viewpoint of facilitating the formation of a polyion complex and improving the stability of the composition, and is preferably 5.0% by mass or less, more preferably 3.0% by mass or less, even more preferably 2.0% by mass or less, still more preferably 1.0% by mass or less, and still more preferably 0.6% by mass or less, from the viewpoint of facilitating the formation of a polyion complex and improving the stability of the composition. When the organic acid is blended in the form of an organic acid salt, the above content is the amount converted into the organic acid.

[0111] However, when the composition contains any of (v) alkyldimethylamines and their salts, (vi) alkoxyalkyldimethylamines and their salts, and (vii) alkylamidoalkyldimethylamines and their salts as component (E), the content of component (G) in the composition may be more than 5.0 mass %. This is because the presence of component (G) as a counter anion of the amine is expected to improve the stability of the composition.

[0112] When the composition contains water, the content of water in the composition is preferably 10% by mass or more, more preferably 40% by mass or more, even more preferably 60% by mass or more, and even more preferably 80% by mass or more, from the viewpoints of facilitating the formation of a polyion complex and improving the stability of the composition. Furthermore, from the viewpoints of improving the stability of the composition and the flexibility of formulation, the content of water is preferably 99% by mass or less, more preferably 95% by mass or less, and even more preferably 90% by mass or less. The content of water in the composition may be the remainder of components (A) to (C).

[0113] (Other ingredients) The composition of the present invention may contain, as optional components, anionic surfactants, nonionic surfactants, amphoteric surfactants, aromatic alcohols such as phenoxyethanol and benzyl alcohol, non-aromatic polyols such as dipropylene glycol, oils other than components (A) and (F), antioxidants, antidandruff agents, vitamins, disinfectants, anti-inflammatory agents, preservatives, chelating agents, moisturizers, pearlizing agents, ceramides, fragrances, plant extracts, UV absorbers, pH adjusters, and the like.

[0114] (pH) From the viewpoint of safety, the pH of the composition is preferably 3.0 or more, more preferably 3.2 or more, as calculated by diluting the composition 20 times with water at 25° C. From the viewpoint of improving the stability of the composition, the pH is preferably 7.5 or less, more preferably 7.0 or less, even more preferably 6.0 or less, and even more preferably 5.0 or less. The pH can be measured using a pH meter according to the method described in the Examples.

[0115] (Method of producing the composition) The method for producing the composition is not particularly limited, but when the composition is an emulsion composition, it is preferable to produce a composition that is excellent in the effect of improving the texture of the object to be treated and the durability of that effect, particularly in the effect of inhibiting discoloration of hair or fibers for head accessories after dyeing and the durability of that effect, and that is also highly stable, by a method that includes the following steps 1 to 3, either step 4-1 or 4-2, and step 5 in this order. Step 1: (C) Preparing Solution 1 Containing Anionic Polymer Step 2: Mixing the solution 1 with (G) an acid or an aqueous solution thereof to prepare a mixture 2 containing (C) anionic polymer, (G) acid, and water. Step 3: Mixing the mixture 2 with (B) a cationic polymer to prepare a mixture 3 containing (B) a cationic polymer, (C) an anionic polymer, (G) an acid, and water. Step 4-1: A step of preparing an emulsion (Ia) by mixing an aqueous phase (I) containing water with an oily phase (I) containing (E) a cationic surfactant and (F) a higher alcohol, and then mixing the emulsion (Ia) with the mixture 3 to prepare an emulsion 4-1. Step 4-2: A step of preparing an emulsion 4-2 by mixing the mixture 3 with an aqueous phase (I) containing water to prepare an aqueous phase (Ia), and then mixing the aqueous phase (Ia) with an oily phase (I) containing (E) a cationic surfactant and (F) a higher alcohol. Step 5: A step of mixing the emulsion 4-1 or emulsion 4-2 with (A) an oily phase (II) containing an organopolysiloxane.

[0116] The above method allows for efficient formation of a polyion complex without being inhibited by other components, and is believed to result in the production of a hair cosmetic composition or a fiber treatment composition for headwear that exhibits an effect of inhibiting color fading after dyeing of hair or fibers for headwear, with the effect being highly durable. In this specification, "aqueous phase" means a phase that constitutes the aqueous phase in the production process of an emulsion composition, and "oil phase" means a phase that constitutes the oil phase in the production process of an emulsion composition.

[0117] In step 1, solution 1 containing the anionic polymer (C) can be prepared by dissolving or dispersing the anionic polymer (C) in water. When preparing a solution in which component (C) is dissolved or dispersed in water, component (C) may be dispersed in advance in an aqueous medium other than water, such as dipropylene glycol, and then dissolved or dispersed in water. A commercially available aqueous solution or dispersion of component (C) can also be used as the solution in which component (C) is dissolved or dispersed in water. Alternatively, for example, the reaction solution obtained when component (C) is produced using water as a reaction solvent can be used as the solution in which component (C) is dissolved or dispersed in water. In step 3, the (B) cationic polymer may be mixed directly with the mixture 2. However, from the viewpoint of ease of production, it is preferable to mix the mixture 2 with a solution in which the component (B) is dissolved or dispersed in water. A commercially available aqueous solution or dispersion of component (B) can also be used as the solution in which component (B) is dissolved or dispersed in water. Alternatively, for example, the reaction solution obtained when component (B) is produced using water as a reaction solvent can be used as the solution in which component (B) is dissolved or dispersed in water. When the (D) nonionic polymer is used, it is preferable that in step 1, a solution in which the (C) anionic polymer is dissolved or dispersed in water is mixed with the (D) nonionic polymer to prepare solution 1 containing the (C) anionic polymer and the (D) nonionic polymer, and this solution is then subjected to step 2 and subsequent steps. [Example]

[0118] The present invention will be described below with reference to examples, but the present invention is not limited to the scope of the examples. Measurements and evaluations in the examples were carried out by the following methods.

[0119] (Number average molecular weight of terminally reactive poly(N-propionylethyleneimine)) The number average molecular weight of poly(N-propionylethyleneimine) was determined by gel permeation chromatography (GPC). Column: K-804L + K-804L Eluent: 1 mmol / L Farmin DM20 (Kao Corporation) / chloroform Flow rate: 1.0mL / min Column temperature: 40℃ Detector: RI Sample volume: 5mg / mL, 100μL Polystyrene equivalent

[0120] (Weight average amount of poly(N-propionylethyleneimine) / dimethylpolysiloxane copolymer) It was determined from the weight average molecular weight of the modified organopolysiloxane, which was the raw material compound, and the mass ratio (a / b) below.

[0121] (Mass ratio of segment (a) to segment (b) in poly(N-propionylethyleneimine) / dimethylpolysiloxane copolymer) The organopolysiloxane of the present invention was dissolved in deuterated chloroform at 5% by mass, and the NMR ( 1 The ratio was determined by 1 H-NMR analysis from the integral ratio of alkyl or phenyl groups in the organopolysiloxane segment to methylene groups in the poly(N-acylalkyleneimine) segment.

[0122] (Viscosity of composition) The viscosity at 30°C of a 1% by mass aqueous solution of component (B) used in the examples and the composition of each example was measured using a Brookfield viscometer (TV-20, manufactured by Toki Sangyo Co., Ltd.).

[0123] (pH measurement) Each hair conditioner was diluted 20 times with water, and the pH at 25°C was measured using a pH meter (F-51, manufactured by Horiba Ltd.).

[0124] (Bleach treatment + L after 7 washes * (measurement of values) <Bleaching> A bleaching agent was prepared by mixing 7 mL of Kao Foam Hair Bleach L (first agent) and 15 mL of Kao Foam Hair Color d (second agent) manufactured by Kao Corporation. 12 g of the bleaching agent was applied to three 10 cm long, 1 g mass Chinese gray hair tresses, and the bleaching agent was applied 30 times to each side with a brush. After leaving the tresses at room temperature (approximately 25°C) for 30 minutes, the tresses were rinsed for 35 seconds with warm water at approximately 40°C at a flow rate of approximately 500 mL per 15 seconds. The tresses were washed for 15 seconds with 0.1 g of plain shampoo with the following composition per tress, and then rinsed for 15 seconds with warm water at about 40° C. The tresses were again washed for 15 seconds with 0.1 g of the same plain shampoo per tress, and then rinsed for 15 seconds with warm water at about 40° C. The tresses were sandwiched between paper towels (Kimtowel, manufactured by Nippon Paper Crecia Co., Ltd.), placed under a weight, and left to stand for 30 seconds, after which they were dried using a hair dryer for 2 minutes. The bleached traces were measured using a colorimeter (Konica Minolta, Inc.'s "CR-400") at six points, three on the front and back of each trace. * The average value of the six measurements is L0 * It was decided.

[0125] <7 times hair washing treatment> The bleached tresses were pre-washed for 15 seconds with warm water at about 40°C, washed with 0.1g of plain shampoo with the following composition per tress for 20 seconds, and then rinsed with warm water at about 40°C for 15 seconds. Next, 0.2g of the conditioner of the Example or Comparative Example was applied to each tress, massaged in with the hands, left for 15 seconds, and then rinsed with warm water at about 40°C for 15 seconds. The tresses were sandwiched between paper towels ("Kimtowel", manufactured by Nippon Paper Crecia Co., Ltd.), placed under a weight, and left to stand for 30 seconds, after which they were dried for 2 minutes using a hair dryer (first hair washing treatment). After washing, the tresses were measured for L / R at 6 points (3 points on the front and back of each tress) using a color difference meter ("CR-400" manufactured by Konica Minolta, Inc.). * The average value of the six measurements is taken as L1 * It was decided. After that, the hair was washed in the same manner as above except that the conditioner was changed to a plain conditioner with the following composition for the second to seventh times, and the L value was measured in the same manner as above. The average value of the six measurements was taken as L7. * It was decided. L7 * and L0 * Difference with (L7 * -L0 * ) was calculated, and L after washing hair 7 times * The smaller the change, the better the effect of inhibiting fading after dyeing and the longer the effect lasted.

[0126] (Evaluation of moisturizing feeling after drying) A 20 cm long, 30 g mass Japanese hair tress was washed with plain shampoo of the following composition and allowed to absorb 15.0 g of water. 1 mL of the conditioner of the Example or Comparative Example was applied to the tress, massaged in with the hands, and left for 30 seconds, then rinsed with warm water at approximately 40°C for 15 seconds. The tress was then sandwiched between cloth towels to remove moisture and then completely dried using a hair dryer. Thereafter, five expert panelists performed a sensory evaluation of the "moist feeling" after drying according to the following evaluation criteria: Example 1 was given 5 points, Comparative Example 3 was given 1 point, and the other Examples and Comparative Examples were evaluated relative to these, and each was shown as the average score of the five panelists. [Evaluation criteria] 1 point: Not moist (comparison example 3 level) 2 points: Not very moist 3 points: Neither 4 points: Slightly moist 5 points: Moist (level of Example 1)

[0127] [Plain shampoo composition] *The amount of active ingredient is the amount of active ingredient. (quality%) Polyoxyethylene (2.0) Lauryl Ether Sulfate Sodium (*11): 15.5 Lauric acid diethanolamide (*12): 1.5 Sodium benzoate: 0.5 Disodium edetate: 0.3 Phosphoric acid: Adjust to pH 7 Purified water: Residual Total: 100.00 (*11) 57.4% by mass of "Emeral E-27C" (active ingredient content 27% by mass) manufactured by Kao Corporation (*12) Kao Corporation's "Aminon C-11S" (active ingredient content 100% by mass)

[0128] [Plain conditioner composition] *The amount of active ingredient is the amount of active ingredient. (quality%) Cetearyl alcohol (*13): 2.0 Stearyltrimethylammonium chloride(*14): 0.76 Distearyldimethylammonium chloride (*15): 2.7 Propylene glycol: 5.0 Isopropanol: 0.6 Ethylparaben: 0.1 Purified water: Residual Total: 100.00 (*13) Kao Corporation's "Kalcol 6870" (active ingredient content 100% by mass) (*14) 2.7% by mass of Kao Corporation's "Cortamine 86W" (active ingredient content 28% by mass) (*15) Kao Corporation's "Cortamine D86P" (active ingredient content 75% by mass) 3.6% by mass

[0129] Production Example 1 (Preparation of oxazoline-modified silicone) 12.9 g (0.13 mol) of 2-ethyl-2-oxazoline and 27.7 g of ethyl acetate were mixed, and the mixture was dehydrated with 2.0 g of molecular sieves (trade name: Zeolum A-4, manufactured by Tosoh Corporation) at 28° C. for 15 hours. Separately, 100 g of a side-chain primary aminopropyl-modified polydimethylsiloxane (trade name: KF-8015, manufactured by Shin-Etsu Chemical Co., Ltd., weight-average molecular weight 100,000 (catalog value), amine equivalent 20,000) was mixed with 203 g of ethyl acetate, and the mixture was dehydrated using 15.2 g of molecular sieves at 28°C for 15 hours. The above ethyl acetate solution of dehydrated 2-ethyl-2-oxazoline was transferred to a reaction vessel, and 0.77 g (0.005 mol) of diethyl sulfate was added. The mixture was heated under reflux at 80°C for 8 hours under a nitrogen atmosphere to obtain a terminal-reactive poly(N-propionylethyleneimine) solution. The number-average molecular weight of the terminal-reactive poly(N-propionylethyleneimine) measured by GPC was 2,600. Next, the terminally reactive poly(N-propionylethyleneimine) solution obtained above was cooled to 30°C, and then the dehydrated side chain primary aminopropyl-modified polydimethylsiloxane solution was added all at once, followed by heating under reflux at 80°C for 10 hours. The reaction mixture was concentrated under reduced pressure to obtain a poly(N-propionylethyleneimine) / dimethylpolysiloxane copolymer as a white rubbery solid (107 g, 94% yield). The mass ratio of the resulting poly(N-propionylethyleneimine) / dimethylpolysiloxane copolymer [content of segment (a) / [total content of segment (a) and segment (b)]] was 0.88, and the weight-average molecular weight (Mw t ) was 114,000 (calculated value). 30 g of poly(N-propionylethyleneimine) / dimethylpolysiloxane copolymer was dissolved in 70 g of ethanol and used in the experiments of the Examples and Comparative Examples.

[0130] Examples 1 to 4 and Comparative Examples 1 to 3 (Preparation and Evaluation of Hair Conditioners) Hair conditioners were prepared using the amounts of each ingredient listed in Table 1 according to the following procedure. Dipropylene glycol and anionic polymer (component (C)) were dispersed in a 500 mL beaker containing water, and the mixture was heated and stirred at 56°C. After confirming that the anionic polymer was completely dissolved, in Example 1, nonionic polymer (D) was further added and completely dissolved to obtain mixture 2. Next, 90% by mass of lactic acid (57% by mass of the total amount of lactic acid, 0.18% by mass as an effective amount) and cationic polymer (component (B)) were added to mixture 2 to obtain mixture 3. In a separate beaker, (E) cationic surfactant, (F) higher alcohol, and benzyl alcohol were mixed and dissolved at 85°C to obtain an oily phase. This oily phase was mixed with Mixture 3 and stirred at 56°C for 10 minutes. After 10 minutes of stirring, heating was stopped and air cooling was initiated. After air cooling, the oxazoline-modified silicone (component (A)) shown in the table and the remaining 90% by mass lactic acid (effective amount 0.14% by mass) were added, and the mixture was cooled with stirring until the liquid temperature reached 40°C or below, yielding 500 mL of hair conditioner. The pH of the resulting hair conditioners was 3.4. The obtained hair conditioner was evaluated according to the above-mentioned method, and the results are shown in Table 1.

[0131] [Table 1]

[0132] The ingredients listed in the table are as follows: The compositions (mass %) in the table are the amounts of each component blended as they are, and the component contents in the table are based on the effective amounts of each component. <Component (A): Organopolysiloxane> *1 Oxazoline-modified silicone obtained in Production Example 1 <Component (B): Cationic polymer> *2 Polyquaternium-52 (N,N-dimethylaminoethyl methacrylate diethyl sulfate, N,N-dimethylacrylamide, polyethylene glycol dimethacrylate copolymer), Kao Corporation's "SOFCARE KG-101W-E" (viscosity of 1% by weight aqueous solution at 30°C: 2560 mPa·s, cationic charge density: 0.83 mmol / g)

[0133] <Component (C): Anionic Polymer> *3 Sodium alginate, Kimica Co., Ltd. "Kimica Algin I-3-150", Mw: 1.9 million to 2.3 million (anion charge density: 4.65 mmol / g)

[0134] <Component (D): Nonionic polymer> *4: Polyethylene glycol, Aoki Oil & Fat Industries Co., Ltd. "Brownon PEG-20000S", Mw: 20,000

[0135] <Component (E): Cationic surfactant> *5 Behenyltrimethylammonium chloride, Kao Corporation's "Cortamin 2285-E"

[0136] <Component (F): Higher alcohol> *6 Cetearyl alcohol, Kao Corporation's "Kalcol 6870"

[0137] <Component (G) acid> *7 90% lactic acid, PURAC ULTRAPURE90 manufactured by PURAC Thailand Ltd. <Other> *8 Dipropylene glycol, ADEKA Corporation "DPG-RF" *9 Benzyl alcohol, manufactured by Valtris Specialty Chemicals

[0138] As shown in Table 1, the composition of the comparative example caused hair discoloration after repeated washing, whereas the composition of this example exhibited a discoloration suppression effect after hair dyeing and demonstrated excellent durability of the effect. This indicates that components (A), (B), and (C) form an ion complex, thereby exhibiting a discoloration suppression effect even after seven hair washes and demonstrating excellent durability of the effect. It also indicates that components (A), (B), and (C) form an ion complex, imparting a moist feeling to hair after drying. Furthermore, Example 1, which contained a nonionic polymer (D), demonstrated particularly excellent effects due to the formation of an ion complex by components (A), (B), (C), and (D). [Industrial Applicability]

[0139] According to the present invention, it is possible to provide a hair cosmetic composition or a fiber treatment composition for head accessories that exhibits an effect of inhibiting discoloration after dyeing of hair or fibers for head accessories and has excellent durability of the effect.

Claims

1. Component (A): An organopolysiloxane segment (a) constituting the main chain, in which at least two silicon atoms are connected via an alkylene group containing a heteroatom to a compound represented by the following general formula (1): 【Chemistry 1】 (In the formula, R １ represents a hydrogen atom, an alkyl group having 1 to 22 carbon atoms, an aralkyl group having 7 to 22 carbon atoms, or an aryl group having 6 to 22 carbon atoms, and n is 2 or 3. An organopolysiloxane comprising a poly(N-acylalkyleneimine) segment (b) bonded to the poly(N-acylalkyleneimine) segment (b) and the poly(N-acylalkyleneimine) segment (b) is composed of a repeating unit represented by the formula: the mass ratio (a / b) of the organopolysiloxane segment (a) to the poly(N-acylalkyleneimine) segment (b) is 70 / 30 to 98 / 2; the weight average molecular weight of the organopolysiloxane segment (a) is 10,000 or more and 200,000 or less; The poly(N-acylalkyleneimine) segment (b) has a number average molecular weight of 500 or more and 5,000 or less. Component (B): Cationic polymer (however, when component (A) is a cationic polymer, component (A) is excluded) Component (C): Anionic polymer A hair cosmetic composition or a fiber treatment composition for head accessories, comprising:

2. 2. The composition according to claim 1, wherein the component (B) is a polymer containing a structural unit represented by the following general formula (I): 【Chemistry 2】 (In the formula, R １１ is a hydrogen atom or a methyl group, and R １２ ~R １４ are each independently an alkyl group having 1 to 4 carbon atoms; X is —O— or —NH—; and m1 is a number of 1 to 4.

3. The composition according to claim 1, wherein the component (B) is at least one selected from the group consisting of methacryloylethyltrimethylammonium chloride polymers and N,N-dimethylaminoethyl methacrylate diethyl sulfate / N,N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymers.

4. 2. The composition according to claim 1, wherein the component (C) comprises (C1) at least one member selected from the group consisting of a crosslinked polymer containing a structural unit derived from (meth)acrylic acid and an anionic polysaccharide.

5. 5. The composition of claim 4, wherein component (C1) is alginic acid or a salt thereof.

6. 2. The composition according to claim 1, wherein the mass ratio of the component (A) to the total amount of the components (B) and (C) contained in the composition [(A) / ((B)+(C))] is 0.1 or more and 20 or less.

7. Component (D): Nonionic polymer The composition according to any one of claims 1 to 6, further comprising:

8. 8. The composition according to claim 7, wherein the mass ratio of the component (D) to the total amount of the components (B) and (C) contained in the composition [(D) / ((B)+(C))] is 0.2 or more and 20 or less.

9. Component (E): a cationic surfactant, and / or Component (F): Higher alcohol The composition according to any one of claims 1 to 6, comprising:

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