Fiber treatment method

Abstract

To provide a method for treating a fiber that can suppress the disintegration of a functional agent-containing silica capsule due to fiber friction.SOLUTION: A method for treating a fiber includes bringing a treatment liquid into contact with a fiber, the fiber including the following component (A), component (B) and water, with the mass ratio of the content of component (B) to the content of component (A), (B) / (A), of 0.5 or more and 40 or less. The component (A) is: a functional agent-containing silica capsule. The component (B) is: at least one surfactant selected from (B1) an anionic surfactant [component (B1)] and (B2) a nonionic surfactant [component (B2)] (where, if both of (B1) and (B2) components are included, the mass ratio of the content of component (B1) to the content of component (B2), (B1) / (B2), is more than 0 and 2 or less).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a method for treating textiles. [Background technology]

[0002] Functional agents such as fragrances, sensates, moisturizers, and disinfectants are incorporated into products for a variety of applications. For example, fragrances are used in products such as fabric softeners, laundry detergents, and body detergents to scent the products themselves, clothing, and the body. In such cases, it is necessary to maintain the fragrance stably so that the scent is not lost within the product. In order to prolong the effects of such functional agents, attempts have been made to encapsulate the functional agents in microcapsules and incorporate them into products. Furthermore, conventional microcapsules with wall materials made of resins such as melamine may be classified as microplastics due to future rule changes based on growing social environmental awareness, raising concerns about their environmental impact.On the other hand, silica capsules, whose wall material is an inorganic compound, do not qualify as microplastics, and if they can be incorporated into products, it is expected that they will reduce the environmental impact.

[0003] Patent Document 1 discloses microcapsules with an average particle size of 0.5 μm or more and 50 μm or less, which are obtained by a predetermined manufacturing method and have a core made of one or more organic compounds, a first shell that encapsulates the core and contains silica as a constituent component, and a second shell that encapsulates the first shell and contains silica as a constituent component.

[0004] Patent Document 2 discloses an aqueous liquid detergent and cleaning agent containing a surfactant and other common components of detergents and cleaning agents, the agent containing at least one capsule, the capsule containing an active ingredient, aluminum silicate, and silica in a matrix, the aluminum silicate and silica being present in a ratio of 1:10 to 10:1.

[0005] Patent Document 3 discloses a fragrance carrier system containing an encapsulated fragrance composition, wherein the fragrance composition contains an emulsion of a fragrance compound in an aqueous medium and is encapsulated in a shell containing a silicon-containing material, the shell having an average diameter size of less than 30 micrometers, and a surfactant composition containing the fragrance carrier system.

[0006] Patent Document 4 discloses a microcapsule having a shell containing silica as a constituent component and a core containing polymer particles and one or more oil-soluble liquids inside the shell. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-128762 [Patent Document 2] Special Publication No. 2009-504812 [Patent Document 3] Special Publication No. 2011-517323 [Patent Document 4] Japanese Patent Application Laid-Open No. 2017-114802 Summary of the Invention [Problem to be solved by the invention]

[0008] Since the functional agent-containing silica capsules are easily disintegrable, they are easily disintegrated by rubbing with the fabric during bath treatment. In some cases, such as when the functional agent-containing silica capsules are left as they are on the fabric after treatment with a composition containing the functional agent-containing silica capsules, and the effect of the functional agent contained in the silica capsules is to be maintained for a long period of time, it may be desirable for the functional agent-containing silica capsules not to disintegrate during bath treatment. The present invention provides a method for treating fibers that can suppress the collapse of functional agent-encapsulating silica capsules due to fiber friction. [Means for solving the problem]

[0009] The present invention relates to a method for treating fibers, which comprises contacting fibers with a treatment liquid containing the following component (A), component (B), and water, wherein the mass ratio (B) / (A) of the content of component (B) to the content of component (A) is 0.5 or more and 40 or less. (A) Ingredient: Silica capsules containing functional agents Component (B): one or more surfactants selected from (B1) anionic surfactants (hereinafter referred to as component (B1)) and (B2) nonionic surfactants (hereinafter referred to as component (B2)). (However, when both components (B1) and (B2) are contained, the mass ratio (B1) / (B2) of the content of component (B1) to the content of component (B2) is greater than 0 and equal to or less than 2.) [Effects of the Invention]

[0010] According to the present invention, there is provided a method for treating fibers that can suppress the collapse of functional agent-encapsulating silica capsules due to fiber friction. DETAILED DESCRIPTION OF THE INVENTION

[0011] The inventors have found that the coexistence of a specific surfactant in functional agent-containing silica capsules can prevent the silica capsules from collapsing in the treatment bath. The reason why the functional agent-containing silica capsules can prevent collapse is not clear, but it is thought to be as follows. It is believed that the presence of an appropriate amount of a specific surfactant in the treatment bath reduces friction between the functional agent-containing silica capsules and the fibers, and suppresses excessive adsorption of the surfactant onto the functional agent-containing silica capsules, thereby preventing the collapse of the silica capsules. However, the present invention is not limited to this mechanism.

[0012] The method for treating fibers of the present invention comprises contacting fibers with a treatment liquid containing the following component (A), component (B), and water, wherein the mass ratio (B) / (A) of the content of component (B) to the content of component (A) is 0.5 or more and 40 or less. (A) Ingredient: Silica capsules containing functional agents Component (B): one or more surfactants selected from (B1) anionic surfactants (hereinafter referred to as component (B1)) and (B2) nonionic surfactants (hereinafter referred to as component (B2)). (However, when both components (B1) and (B2) are contained, the mass ratio (B1) / (B2) of the content of component (B1) to the content of component (B2) is greater than 0 and equal to or less than 2.)

[0013] <Processing liquid> First, the treatment liquid used in the fiber treatment method of the present invention (hereinafter also referred to as the treatment liquid of the present invention) will be described. The treatment liquid of the present invention contains the above-mentioned component (A), component (B), and water, and the mass ratio (B) / (A) of the content of component (B) to the content of component (A) is 0.5 or more and 40 or less.

[0014] Examples of functional agent-containing silica capsules of component (A) include those having a shell containing silica as a constituent component and a core containing a functional agent inside the shell.

[0015] (shell) Component (A) may have a shell containing silica as a constituent component. The shell of component (A) may be composed of silica as a constituent component in part or substantially in its entirety. From the viewpoint of preventing the functional agent-encapsulated silica capsules from collapsing due to fiber friction, the silica is preferably produced from raw silica, which generates a silanol compound through hydrolysis of alkoxysilanes, etc. From the viewpoint of preventing the functional agent-encapsulated silica capsules from collapsing due to fiber friction, the shell of component (A) of the present invention is preferably formed by a sol-gel reaction using an alkoxysilane as a precursor. In the present invention, the term "sol-gel reaction" refers to a reaction in which an alkoxysilane undergoes hydrolysis and polycondensation to form silica, a constituent component of the shell, through a sol and gel state. Specifically, for example, tetraalkoxysilane is hydrolyzed, and the silanol compound undergoes a dehydration condensation reaction and a dealcoholization condensation reaction to generate a siloxane oligomer, and the dehydration condensation reaction further progresses to form silica.

[0016] The raw silica may be, for example, at least one selected from the group consisting of silicon tetrachloride, tetraalkoxysilane, alkylalkoxysilane, water glass, and metal silicate. Among them, tetraalkoxysilane and alkylalkoxysilane are preferred, and tetraalkoxysilane is more preferred, from the viewpoint of suppressing the collapse of the functional agent-encapsulating silica capsules due to fiber friction.

[0017] Specific examples of tetraalkoxysilane include tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, etc. From the viewpoint of suppressing the collapse of the functional agent-encapsulating silica capsules due to fiber friction, tetramethoxysilane and tetraethoxysilane are preferred, and tetraethoxysilane is more preferred. Specific examples of alkylalkoxysilanes include methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, dimethyldiethoxysilane, diphenyldiethoxysilane, methylphenyldiethoxysilane, ethylphenyldimethoxysilane, diethyldiethoxysilane, ethylphenyldiethoxysilane, trimethylmethoxysilane, trimethylethoxysilane, dimethylphenylethoxysilane, triethylmethoxysilane, and triethylethoxysilane. These may be used alone or in combination of two or more. Condensates thereof may also be used.

[0018] In addition, the shell of the silica capsule of the present invention may contain an inorganic polymer other than silica as a constituent component, as long as the effect of the present invention is not impaired. In the present invention, the inorganic polymer refers to a polymer containing an inorganic element. Examples of the inorganic polymer include a polymer consisting only of inorganic elements, a polymer whose main chain is composed only of inorganic elements and has an organic group as a side chain or substituent, and the like. From the viewpoint of preventing the functional agent-containing silica capsules from collapsing due to fiber friction, the inorganic polymer is preferably a metal oxide containing a metal element or a semimetal element, and more preferably a metal alkoxide [M(OR) x The polymer is formed by a reaction similar to the sol-gel reaction of silica using the precursor M, where M is a metal or semimetal element, and R is a hydrocarbon group. Examples of metal or semimetal elements constituting the metal alkoxide include titanium, zirconium, aluminum, and zinc.

[0019] The shell may have a first shell and a second shell, and component (A) may have a first shell encapsulating a core containing one or more functional agents and a second shell encapsulating the first shell. Furthermore, component (A) of the present invention may have a third shell made of an organic polymer compound in contact with the second shell. Such a multi-layer shell is preferable from the viewpoint of being able to retain functional agents such as fragrances for a long period of time and preventing disintegration of the functional agent-encapsulated silica capsules due to fiber friction.

[0020] The thickness of the shell (the first shell when the first and second shells are present) is preferably 5 nm or more, and preferably 20 nm or less, more preferably 15 nm or less, from the viewpoint of preventing the functional agent-containing silica capsules from collapsing due to fiber friction. Also, from the viewpoint of preventing the functional agent-containing silica capsules from collapsing due to fiber friction, the shell (first shell) is preferably a dense layer with as few pores as possible, in order to maintain the encapsulated functional agent for a long period of time.

[0021] When component (A) has a second shell, the thickness of the second shell is preferably 10 nm or more, more preferably 20 nm or more, and preferably 100 nm or less, more preferably 80 nm or less, from the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction. From the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction, the second shell preferably has a mesoporous structure, which has a high-order structure in which silica is present not only in the direction along the interface with the first shell but also in the thickness direction. Here, the "mesoporous structure" in the second shell refers to a structure in which the diameter of the pores (so-called mesopores) present in the structure is preferably greater than 2 nm, more preferably 10 nm or more, even more preferably 30 nm or more, from the viewpoint of suppressing the collapse of the functional agent-encapsulating silica capsules due to fiber friction, and is preferably 50 nm or less, more preferably 45 nm or less, even more preferably 40 nm or less. Since the second shell has a mesoporous structure, component (A) has high mechanical strength.

[0022] The average thickness of the first and second shells of component (A) and the pore diameters of the first and second shells can be measured by observation with a transmission electron microscope (TEM). Specifically, the thicknesses of the first and second shells and the pore diameters of the first and second shells are measured on photographs under a transmission electron microscope. This procedure is repeated five times with the field of view changed. The thicknesses of the first and second shells and the distribution of pore diameters are determined from the obtained data. The magnification of the transmission electron microscope is typically 10,000 to 100,000 times, but this can be adjusted appropriately depending on the size of component (A). Here, a transmission electron microscope (TEM) such as the "JEM-2100" (manufactured by JEOL Ltd.) can be used.

[0023] (core) The core of the component (A) of the present invention contains one or more functional agents. The functional agent may be, for example, an oil-soluble liquid. When a fragrance is used as the functional agent, the component (A) encapsulates the fragrance inside the shell, and when the shell is ruptured, the fragrance is released and emits a fragrance.

[0024] Examples of functional agents include at least one selected from the group consisting of fragrances, fragrance precursors, oils, antioxidants, cooling agents, warming agents, antibacterial agents, dyes, pigments, UV absorbers, silicones, solvents, and oil-soluble polymers, at least one selected from the group consisting of fragrances, fragrance precursors, oils, antioxidants, cooling agents, warming agents, antibacterial agents, UV absorbers, and solvents, and at least one selected from the group consisting of fragrances and fragrance precursors.Furthermore, the functional agent may be a skin care ingredient such as a moisturizer, a cosmetic oil, a preservative, an antioxidant, an insecticide, or an insect repellent.

[0025] Examples of fragrances include γ-undecalactone, 2-cyclohexylidene-2-phenylacetonitrile, damascenone, δ-damascone, α-methyl-β-(pt-butylphenyl)-propionaldehyde, β-ionone, myrrh aldehyde, ethyl tricyclo[5.2.1.0-2,6]decane-2-carboxylate, citronellol, geraniol, α-ionone, patchouli alcohol, 6,7-dihydro-1,1,2,3,3-pentamethyl-4(5H)-indanone, methyl dihydrojasmonate, and hexyl cinnamic aldehyde. , amyl cinnamic aldehyde, allylcyclohexyl propionate, dimethylbenzylcarbinyl butyrate, tricyclodecenyl propionate, amyl salicylate, γ-methyl ionone, α-damascone, β-damascone, nerolin yarayara, phenylhexanol, 2-methyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol, dodecahydro-3a,6,6,9a-tetramethylnaphtho[2,1-b]furan, γ-nonalactone, methyl β-naphthyl ketone, eugenol, lyral, dimethyl acetate Benzyl carbinil, iso-damascone, 2-cyclohexylidene-2-phenylacetonitrile, γ-decalactone, α-methyl-3,4-methylenedioxyhydrocinnamic aldehyde, 7-methyl-3,5-dihydro-2H-benzodioxepinone, tricyclodecenyl acetate (tricyclodecenyl acetate), tricyclodecenyl propionate, allyl 2-pentyloxyglycolate, 1-(2-tert-butylcyclohexyloxy)-2-butanol, citronellyloxyacetaldehyde, indole, 4-methyl-3-decene -5-ol, para-menthan-8-thiol-3-one, 3-(para-tert-butylphenyl)-propanal, ethyl cinnamate, 5-methyl-3-heptanone oxime, methyl anthranilate, terpineol, β-caryophyllene, citronellyl acetate, geranyl acetate, neryl acetate, p,t-butylcyclohexyl acetate, o,t-butylcyclohexyl acetate, tetrahydrogeraniol, 2-isobutyl-4-hydroxy-4-methyltetrahydropyranol (Florosa), α-dynascone, cis-jasmone, bicyclo[3.2.1) Octan-8-one-1,5-dimethyloxime, 2,4-dimethyl-4,4α,5,9β-tetrahydroindeno[1,2-d]-m-dioxine, 3-(para-ethylphenyl)-2,2-dimethylpropanal, ethyl-2-tert-butylcyclohexylcarbonate, hexyl benzoate, 4-acetoxy-3-amyltetrahydropyran, dodecyl aldehyde, dihydro-β-ionone, methylcyclooctyl Carbonate, Ethyl Methylphenylglycidate, Isoeugenol, Diphenyl Oxide, 2,2,5-Trimethyl-5-pentylcyclopentanone, Thymol, Neroline Bromeliad, 5,6-Dimethyl-8-Isopropenyl, Bicyclo[4,4,0]-1-Decen-3-one, 3-(4-Isopropylphenyl)-propanal, 4-Isopropylcyclohexanemethanol, Methyl Methylanthranilate, Dodecanenitrile 3-Dodecenal, Octanal, Nonanal, Decanal, Lilial, p,t-Butylhydrocinnamic aldehyde, Dimethyltetrahydrobenzaldehyde, Hexyl acetate, Linalyl acetate, Terpinyl acetate, Allyl caproate, Hexyl salicylate, Benzyl salicylate, Cyclohexyl salicylate, cis-3-hexenyl salicylate, Cyclamen aldehyde, Limonene, Linalool, Tetrahydrolinalool, Dihydromethane Examples of suitable fragrances include ruthenium, methyl β-naphthyl ketone, Iso E Super, cedryl methyl ether, Javanol (manufactured by Givaudan), ambroxan, 1,8-cineole, geranyl nitrile, citronellyl nitrile, 11-oxa-16-r-canolide (Musk R-1, manufactured by Givaudan), ethylene brassylate, ethylene dodecanedioate, cashmeran, cyclopentadecanolide, cyclohexadecanolide, and ambrettelide. The fragrance may be a fragrance composition containing multiple fragrances.

[0026] Examples of fragrance precursors include compounds that react with water to release fragrance components. Specific examples include silicate ester compounds having an alkoxy component derived from a fragrance alcohol, fatty acid ester compounds having an alkoxy component derived from a fragrance alcohol, acetal compounds or hemiacetal compounds obtained by reacting a carbonyl component derived from a fragrance aldehyde or fragrance ketone with an alcohol compound, Schiff base compounds obtained by reacting a carbonyl component derived from a fragrance aldehyde or fragrance ketone with a primary amine compound, and hemiaminal compounds or hydrazone compounds obtained by reacting a carbonyl component derived from a fragrance aldehyde or fragrance ketone with a hydrazine compound.

[0027] Other types of fragrance precursors include compounds that release fragrance components in response to light. Examples include 2-nitrobenzyl ether compounds having an alkoxy component derived from a fragrance alcohol, α-ketoester compounds having a carbonyl component derived from a fragrance aldehyde or fragrance ketone, and coumaric acid ester compounds having an alkoxy component derived from a fragrance alcohol. These fragrance precursors may be used as polymers, such as reaction products of some carboxy groups of polyacrylic acid with a fragrance alcohol. Among these, silicate ester compounds having an alkoxy component derived from a fragrance alcohol are preferred.

[0028] The ClogP value of the functional agent is preferably 2 or more, more preferably 3 or more, even more preferably 4 or more, and preferably 30 or less, more preferably 20 or less, even more preferably 10 or less. When the ClogP value of the functional agent is 2 or more, the encapsulation rate of the functional agent within component (A) (hereinafter also referred to as "encapsulation rate") is improved. Here, the same applies when the functional agent is a fragrance composition containing multiple fragrances; when the ClogP value of the fragrance composition is 2 or more, the encapsulation rate (encapsulation rate) of the fragrance composition within component (A) can be improved. Here, the ClogP value is the "calculated logP (ClogP)" calculated by the method described in A. Leoin, "Comprehensive Medicinal Chemistry," Vol. 4, (C. Hansch, P.G. Sammes, J.B. Taylor and C.A. Ramsden, Eds.), p. 295, Pergamon Press, 1990, and is the ClogP value calculated using the program CLOGP v4.01. In the case of a fragrance composition containing multiple fragrances, the ClogP value of the fragrance composition can be determined by multiplying the ClogP value of each fragrance by its volume ratio in the fragrance composition and calculating the sum of the results.

[0029] From the viewpoint of retaining the functional agent, the oil-water interfacial tension of the functional agent is preferably 7 mN / m or more, more preferably 10 mN / m or more, and even more preferably 13 mN / m or more at 25° C. The oil-water interfacial tension of the functional agent can be measured, for example, using a contact angle meter "DropMaster DM-501" (trade name, manufactured by Kyowa Interface Science Co., Ltd.).

[0030] From the viewpoint of incorporation into products and retention of functional agents, the volume average particle size of component (A) is preferably 0.5 μm or more, more preferably 0.7 μm or more, even more preferably 1 μm or more, and is preferably 50 μm or less, more preferably 10 μm or less, even more preferably 5 μm or less. In the present invention, the volume-average particle size of component (A) can be measured by the method described in the Examples. For example, it can be measured using a laser diffraction / scattering particle size distribution analyzer "LA-960" (trade name, manufactured by Horiba, Ltd.). In this case, a flow cell is used for the measurement, the medium is water, and the refractive index is set to 1.40-0i. A dispersion containing component (A) is added to the flow cell, and measurement is performed at a concentration that shows a transmittance of around 90%, and the volume-based average particle size is determined.

[0031] The component (A) can be obtained, for example, by a production method having the following steps (1) and (2), and preferably further having the following step (3). Step (1): A step of mixing and emulsifying an organic phase containing one or more oil-soluble liquids, a monomer capable of constituting polymer microparticles, a radical polymerization initiator, and raw silica into an aqueous phase containing a surfactant, and then carrying out a sol-gel reaction under acidic conditions to form a shell, thereby forming capsules encapsulating the oil-soluble liquid, the monomer, and the radical polymerization initiator. Step (2): Heating the aqueous dispersion containing the capsules obtained in Step (1) to polymerize the monomers and form polymer particles inside the shells. Step (3): A step of adding raw silica to the dispersion containing the capsules obtained in step (1) or (2) to carry out a sol-gel reaction, thereby forming capsules having a second shell encapsulating the first shell.

[0032] Here, the "sol-gel reaction" in steps (1) and (3) is a reaction in which raw material silica (silica precursor) is hydrolyzed and polycondensed under acidic conditions to polymerize while eliminating alcohol, thereby synthesizing silica for the first and second shells.

[0033] The production method can be carried out with reference to, for example, JP 2015-128762 A and JP 2017-114802 A. In the production method, the component (A) is usually obtained in a dispersed state in water. Depending on the application, this aqueous dispersion can be used as is, but in some cases, the component (A) is separated and used. As a separation method, filtration, centrifugation, etc. can be used.

[0034] In the (A) component, the proportion of the functional agent in the total of the functional agent and silica may be, for example, 50 mass% or more, further 60 mass% or more, further 70 mass% or more, and 99 mass% or less, further 97 mass% or less, or further 95 mass% or less.

[0035] The component (B) is one or more surfactants selected from (B1) anionic surfactants (hereinafter referred to as component (B1)) and (B2) nonionic surfactants (hereinafter referred to as component (B2)).

[0036] From the viewpoint of preventing the functional agent-encapsulated silica capsules from collapsing due to fiber friction, the anionic surfactant of component (B1) may be a sulfonic acid or a salt thereof having a hydrocarbon group, a sulfate ester or a salt thereof having a hydrocarbon group, or a carboxylic acid or a salt thereof, with sulfonic acid or a salt thereof having a hydrocarbon group and carboxylic acid or a salt thereof being preferred. The hydrocarbon group may be an alkyl or alkenyl group. From the viewpoint of preventing the functional agent-encapsulated silica capsules from collapsing due to fiber friction, the number of carbon atoms in the hydrocarbon group is preferably 6 or more, more preferably 7 or more, even more preferably 9 or more, even more preferably 11 or more, and preferably 24 or less, more preferably 22 or less, even more preferably 20 or less, and even more preferably 18 or less. Examples of the salt include monovalent metal salts such as sodium salts and potassium salts, divalent metal salts such as magnesium salts, and organic amine salts such as ammonium salts, monoethanolamine salts, diethanolamine salts, and triethanolamine salts. From the viewpoint of preventing the functional agent-encapsulated silica capsules from collapsing due to fiber friction, sodium salts are preferred.

[0037] From the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, the component (B1) is preferably one or more anionic surfactants selected from the following components (b1-1) to (b1-5), more preferably one or more anionic surfactants selected from components (b1-1) to (b1-3), and even more preferably one or more anionic surfactants selected from components (b1-2) and (b1-3).

[0038] Component (b1-1): a sulfonic acid or a salt thereof represented by the following general formula (b1-1): R 1 -B-SO3M (b1-1) [In formula (b1-1), R 1 represents an alkyl or alkenyl group having 3 to 21 carbon atoms, B represents a benzene ring, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium. 1 whereas the sulfonic acid group is attached at the ortho, meta or para position.

[0039] Component (b1-2): Internal olefin sulfonic acid or its salt having 14 to 24 carbon atoms (b1-3) component: fatty acid or its salt having 10 to 20 carbon atoms

[0040] Component (b1-4): a sulfate ester or a salt thereof represented by the following general formula (b1-4): R 2 -O-[(PO) m / (EO) n ]-SO3M (b1-4) [In formula (b1-4), R 2 represents an alkyl or alkenyl group having 8 to 22 carbon atoms, the carbon atom bonded to the oxygen atom is the first carbon atom, PO represents a propyleneoxy group, EO represents an ethyleneoxy group, EO and PO may be bonded in a block or random manner, / is a symbol indicating that the bonding order of PO and EO does not matter, m and n represent the average number of moles added, m is 0 to 5 and n is 0 to 16, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium or an organic ammonium.

[0041] Component (b1-5): an α-sulfofatty acid ester represented by the following general formula (b1-5) or a salt thereof R 3 -CH(SO3M)COOR 4 (b1-5) [In formula (b1-5), R 3 represents an alkyl or alkenyl group having 6 to 20 carbon atoms, and R 4 represents an alkyl group having 1 to 6 carbon atoms, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium.

[0042] In formula (b1-1), R 1 From the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction, the number of carbon atoms is 3 or more, preferably 5 or more, more preferably 7 or more, even more preferably 10 or more, and 21 or less, preferably 19 or less, more preferably 17 or less, even more preferably 15 or less.

[0043] In formula (b1-1), M represents a hydrogen atom, an alkali metal, an alkaline earth metal (half an atom), ammonium, or an organic ammonium, and is preferably an alkali metal or an alkanolammonium having 2 to 6 carbon atoms from the viewpoint of suppressing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction. Examples of the alkali metal include sodium and potassium. Examples of the alkaline earth metal include calcium and magnesium. Examples of the organic ammonium include alkanolammonium such as monoethanolammonium, diethanolammonium, and triethanolammonium. The content of the component (b1-1) in the present invention is based on the amount of the compound converted to its sodium salt, i.e., the concentration (ppm) and mass ratio are calculated based on the amount of the compound in which M in general formula (b1-1) is sodium.

[0044] Specific examples of the component (b1-1) include sodium alkylbenzene sulfonate and cumene sulfonic acid.

[0045] The number of carbon atoms in the (b1-2) component is 14 or more, more preferably 16 or more, even more preferably 18 or more, and 24 or less, preferably 22 or less, more preferably 20 or less, from the viewpoint of preventing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction. The component (b1-2) may contain, in addition to the internal olefin sulfonic acid or its salt, a hydroxyalkane sulfonic acid or its salt, or an olefin sulfonic acid or its salt, which are produced during synthesis.

[0046] Examples of salts of component (b1-2) include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, ammonium salts, and organic ammonium salts, such as alkanolammonium salts such as monoethanolammonium, diethanolammonium, and triethanolammonium. From the viewpoint of preventing the functional agent-encapsulating silica capsules from collapsing due to fiber friction, alkali metal salts and alkanolammonium salts having from 2 to 6 carbon atoms are preferred. The content of the component (b1-2) in the present invention is based on the amount of the compound converted into a potassium salt.

[0047] From the viewpoint of preventing the functional agent-encapsulating silica capsules from collapsing due to fiber friction, the number of carbon atoms in the (b1-3) component is 10 or more, preferably 11 or more, more preferably 12 or more, and 20 or less, preferably 18 or less, more preferably 16 or less. This number of carbon atoms does not include the number of carbon atoms contained in the salts described below (the same applies hereinafter).

[0048] Examples of the salt of component (b1-3) include alkali metal salts, alkaline earth metal (half atom) salts, ammonium salts, and organic ammonium salts, from the viewpoint of preventing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction. The content of the component (b1-3) in the present invention is based on the amount of the compound converted into an acid form (hydrogen atom).

[0049] The ratio of the fatty acid having 12 carbon atoms (including fatty acid salts) to the total fatty acids (including fatty acid salts) of the (b1-3) component is preferably 20% by mass or more, more preferably 25% by mass or more, even more preferably 30% by mass or more, from the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction, and is preferably 60% by mass or less, more preferably 50% by mass or less, even more preferably 40% by mass or less.

[0050] Specific examples of the (b1-3) component include lauric acid, myristic acid, palmitic acid, coconut fatty acid, palm fatty acid, and palm kernel fatty acid.

[0051] In formula (b1-4), R 2 From the viewpoint of suppressing the collapse of the functional agent-containing silica capsules due to fiber friction, R is preferably an alkyl or alkenyl group, preferably an alkyl group, having a carbon number of 9 or more, more preferably 10 or more, even more preferably 12 or more, and preferably 18 or less, more preferably 16 or less, even more preferably 14 or less. 2 is preferably a linear alkyl group having the above carbon number.

[0052] In formula (b1-4), m is 0 or more and preferably 4 or less, more preferably 3 or less, from the viewpoint of suppressing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction.

[0053] In formula (b1-4), n is 0 or more, preferably 1 or more, more preferably 2 or more, and preferably 10 or less, more preferably 8 or less, and even more preferably 6 or less, from the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction.

[0054] Examples of salts of component (b1-4) include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as calcium and magnesium, ammonium salts, organic ammonium salts, and alkanolammonium salts such as monoethanolammonium, diethanolammonium, triethanolammonium, etc. From the viewpoint of suppressing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction, preferred examples of salts of component (b1-4) include alkali metal salts and alkanolammonium salts having from 2 to 6 carbon atoms. The content of the component (b1-4) in the present invention is based on the amount of the compound converted into its sodium salt.

[0055] In formula (b1-5), R 3 is an alkyl or alkenyl group, preferably an alkyl group, having a carbon number of preferably 8 or more, more preferably 10 or more, and preferably 18 or less, more preferably 16 or less, from the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction.

[0056] In formula (b1-5), R 4 is an alkyl group having 1 or more carbon atoms, and preferably 5 or less, more preferably 4 or less, from the viewpoint of suppressing the collapse of the functional agent-encapsulating silica capsules due to fiber friction.

[0057] In formula (b1-5), M is preferably a hydrogen atom, an alkali metal such as sodium or potassium, an alkaline earth metal (1 / 2 atom) such as magnesium or calcium, or an organic ammonium, from the viewpoint of preventing the functional agent-encapsulated silica capsules from collapsing due to fiber friction. M is more preferably an alkali metal such as sodium or potassium, or an alkanolammonium such as monoethanolammonium or diethanolammonium, and even more preferably sodium, from the viewpoint of preventing the functional agent-encapsulated silica capsules from collapsing due to fiber friction. The content of the component (b1-5) in the present invention is based on the amount of the compound converted into its sodium salt.

[0058] Specific examples of the (b1-5) component include those represented by the formula (b1-5), in which R 3 is an alkyl group having 11 or more and 14 or less, R 4 is a methyl group.

[0059] From the viewpoint of inhibiting disintegration of the functional agent-encapsulating silica capsules due to fiber friction, examples of the nonionic surfactant of component (B2) include sucrose fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene fatty acid esters, fatty acid alkanolamides or their alkylene oxide adducts, polyoxyalkylene alkyl ethers, alkyl glycosides, polyoxyalkylene alkyl ethers, and glyceryl monoethers, with polyoxyalkylene ethers and fatty acid methyl ester alkoxylates being preferred.

[0060] As the (B2) component, from the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, one or more nonionic surfactants selected from the following components (b2-1) to (b2-4) are preferred, and one or more nonionic surfactants selected from components (b2-2) and (b2-3) are more preferred.

[0061] Component (b2-1): a compound represented by the following general formula (b2-1): R 5 -O-(EO) m -H (b2-1) [In the formula, R 5 represents a primary alkyl group or a primary alkenyl group having 8 to 20 carbon atoms, EO represents an ethyleneoxy group, and m represents the average number of moles added, which is 2 to 50.

[0062] Component (b2-2): a compound represented by the following general formula (b2-2): R 6 -O-[(PO) p / (EO) q ]-H (b2-2) [In the formula, R 6 represents an alkyl or alkenyl group having 8 to 20 carbon atoms, EO represents an ethyleneoxy group, PO represents a propyleneoxy group, EO and PO are bonded in a block or random manner, / represents the symbol indicating that the bonding order of PO and EO does not matter, p represents the average number of moles of PO added and is 0.1 to 20, and q represents the average number of moles of EO added and is 4 to 25.

[0063] Component (b2-3): a nonionic surfactant in which ethylene oxide is added to a secondary alcohol, specifically, a compound represented by the following general formula (b2-3): R 7 -O-(EO) s -H (b2-3) [In the formula, R 7 is a linear or branched secondary alkyl or secondary alkenyl group having from 8 to 24 carbon atoms, EO is an ethyleneoxy group, and s is the average number of moles added, which is from 3 to 24. (b2-4) Component: Fatty acid methyl ester alkoxylate having 8 to 24 carbon atoms

[0064] In formula (b2-1), R 5From the viewpoint of preventing the functional agent-encapsulated silica capsules from collapsing due to fiber friction, the number of carbon atoms is 8 or more, preferably 10 or more, more preferably 12 or more, and 20 or less, preferably 18 or less, more preferably 16 or less, and even more preferably 14 or less. The primary alkyl group or primary alkenyl group is R 5 In -O, R bonded to O 5 It refers to a group in which the carbon atom is a primary carbon.

[0065] In formula (b2-1), m is 2 or more, preferably 5 or more, more preferably 7 or more, even more preferably 10 or more, and 50 or less, preferably 40 or less, more preferably 30 or less, even more preferably 20 or less, from the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction.

[0066] In formula (b2-2), R 6 From the viewpoint of preventing the functional agent-encapsulated silica capsules from collapsing due to fiber friction, the number of carbon atoms is 8 or more, preferably 10 or more, more preferably 12 or more, and 20 or less, preferably 18 or less, more preferably 16 or less, and even more preferably 14 or less.

[0067] In formula (b2-2), p is the average number of moles of PO added, and from the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction, it is a number of 0.1 or more, preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, and 20 or less, preferably 10 or less, even more preferably 8 or less, still more preferably 6 or less, and still more preferably 4 or less. From the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction, p may preferably be a number of 2 or more and 8 or less.

[0068] In formula (b2-2), q is the average number of moles of EO added, and from the viewpoint of suppressing the collapse of the functional agent-encapsulating silica capsules due to fiber friction, it is a number of 4 or more, preferably 7 or more, more preferably 10 or more, and 25 or less, preferably 20 or less, more preferably 18 or less, and even more preferably 17 or less.

[0069] In formula (b2-3), R 7 is preferably a linear secondary alkyl group from the viewpoint of preventing the functional agent-encapsulating silica capsule from collapsing due to fiber friction, and R 7 The number of carbon atoms in the group represented by R is preferably 10 or more, more preferably 12 or more, and is preferably 18 or less, more preferably 14 or less. The secondary alkyl group and the secondary alkenyl group are defined as groups represented by R 7 The carbon atom bonded to -O- among the carbon atoms of R is a secondary carbon atom. 7 The carbon chain bonded to the secondary carbon may further have a side chain (branched chain).

[0070] In formula (b2-3), s is preferably 4 or more, more preferably 5 or more, from the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction, and is preferably 18 or less, more preferably 16 or less, and even more preferably 12 or less.

[0071] From the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, component (b2-4) is a methyl ester of a fatty acid having a carbon number of preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, still more preferably 16 or more, and preferably 24 or less, more preferably 22 or less, even more preferably 20 or less, and still more preferably 18 or less, and is a nonionic surfactant having an average added mole number of ethyleneoxy groups of preferably 6 or more, more preferably 8 or more, even more preferably 10 or more, still more preferably 15 or more, and preferably 30 or less, more preferably 25 or less, and still more preferably 20 or less.

[0072] The treatment solution of the present invention contains water. That is, the remainder other than the optional components such as component (a) and component (b) and component (c) may be water. Examples of water include tap water, groundwater, and river water. The water preferably has hardness. From the viewpoint of suppressing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction, the water hardness is preferably 0.2° dH or more, more preferably 0.5° dH or more, even more preferably 0.8° dH or more, still more preferably 1° dH or more, even more preferably 1.5° dH or more, and preferably 20° dH or less, more preferably 15° dH or less, and even more preferably 10° dH or less, on the German hardness scale. Here, German hardness (°dH) in this specification refers to the concentration of calcium and magnesium in water expressed as a CaCO3 equivalent concentration of 1 mg / L (ppm) = approximately 0.056°dH (1°dH = 17.8 ppm). The calcium and magnesium concentrations for this German hardness are determined by chelate titration using ethylenediaminetetraacetic acid disodium salt. A specific method for measuring the German hardness of water in this specification is shown below. <Method for measuring water hardness in Germany> 〔reagent〕 0.01 mol / l EDTA·2Na solution: 0.01 mol / l aqueous solution of disodium ethylenediaminetetraacetic acid (titration solution, 0.01 M EDTA-Na2, manufactured by Sigma-Aldrich) ·Universal BT indicator (product name: Universal BT Co., Ltd., manufactured by Dojindo Laboratories) Ammonia buffer solution for hardness measurement (67.5 g of ammonium chloride dissolved in 570 ml of 28 w / v% ammonia water, and then made up to 1000 ml with ion-exchanged water) [Measurement of hardness] (1) Use a volumetric pipette to collect 20 ml of sample water into a conical beaker. (2) Add 2 ml of ammonia buffer solution for hardness measurement. (3) Add 0.5 ml of Universal BT indicator. After addition, confirm that the solution is reddish purple. (4) While shaking the conical beaker well, add 0.01 mol / l EDTA·2Na solution dropwise from the burette. The endpoint of the titration is when the sample water turns blue. (5) The total hardness is calculated using the following formula. Hardness (°dH)=T×0.01×F×56.0774×100 / A T:0.01mol / l Titration amount of EDTA・2Na solution (mL) A: Sample volume (20 mL, volume of sample water) F: Factor of 0.01 mol / l EDTA·2Na solution

[0073] <Composition, etc.> From the viewpoint of suppressing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction, the concentration of component (A) in the treatment solution of the present invention may be preferably 1 ppm or more, more preferably 5 ppm or more, even more preferably 40 ppm or more, still more preferably 80 ppm or more, and preferably 1000 ppm or less, more preferably 800 ppm or less, even more preferably 400 ppm or less. In the present invention, ppm represents a mass ratio (the same applies to ppm hereinafter).

[0074] From the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, the concentration of component (B) in the treatment solution of the present invention may be preferably 1 ppm or more, more preferably 10 ppm or more, even more preferably 80 ppm or more, still more preferably 150 ppm or more, and preferably 1000 ppm or less, more preferably 800 ppm or less, even more preferably 600 ppm or less, and still more preferably 300 ppm or less.

[0075] In the treatment liquid of the present invention, the mass ratio (B) / (A) of the content of component (B) to the content of component (A), from the viewpoint of suppressing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction, is 0.5 or more, preferably 0.6 or more, more preferably 0.7 or more, even more preferably 0.8 or more, and 40 or less, preferably 30 or less, more preferably 25 or less, even more preferably 20 or less. Here, the content of component (B) is the total content of component (B), i.e., the total content of components (B1) and (B2).

[0076] From the viewpoint of suppressing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction, (B1) / (A), which is the mass ratio of the content of component (B1) to the content of component (A) in the treatment liquid of the present invention, is preferably 0 or more, more preferably 0.1 or more, even more preferably 0.3 or more, still more preferably 0.5 or more, still more preferably 0.6 or more, still more preferably 0.7 or more, and preferably 40 or less, more preferably 30 or less, and even more preferably 20 or less. It is preferable that (B1) / (A) satisfies the above range while (B) / (A) satisfies the above range.

[0077] From the viewpoint of suppressing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction, (B2) / (A), which is the mass ratio of the content of component (B2) to the content of component (A) in the treatment liquid of the present invention, is preferably 0 or more, more preferably 0.1 or more, even more preferably 0.3 or more, still more preferably 0.5 or more, still more preferably 0.6 or more, still more preferably 0.7 or more, and preferably 40 or less, more preferably 30 or less, and even more preferably 20 or less. It is preferable that (B2) / (A) satisfies the above range while (B) / (A) satisfies the above range.

[0078] When the treatment liquid of the present invention contains the component (B1) and the component (B2), the mass ratio (B1) / (B2) of the content of the component (B1) to the content of the component (B2) in the treatment liquid is greater than 0, preferably at least 0.1, more preferably at least 0.2, even more preferably at least 0.3, and is 2 or less, preferably 1.8 or less, more preferably 1.7 or less, even more preferably 1.5 or less, from the viewpoint of suppressing the collapse of the functional agent-encapsulating silica capsules due to fiber friction.

[0079] The treatment liquid of the present invention may further contain an organic solvent having a hydroxyl group as component (C) from the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, provided that component (C) excludes the organic solvent having a hydroxyl group encapsulated in component (A).

[0080] From the viewpoint of preventing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, component (C) is preferably one or more organic solvents selected from the following components (c1) to (c4), and more preferably one or more organic solvents including component (c2). (c1) Component: Monohydric alcohol with 2 to 6 carbon atoms (c2) component: an alcohol having 2 to 12 carbon atoms and a valence of 2 to 12; Component (c3): An organic solvent having a hydrocarbon group, an ether group, and a hydroxyl group, with 1 to 8 carbon atoms (however, the hydrocarbon group does not include aromatic groups). Component (c4): an organic solvent having an aromatic group, an ether group, and a hydroxyl group, which may be partially substituted

[0081] Examples of the component (c1) include ethanol and isopropanol, and ethanol is preferred from the viewpoint of preventing the functional agent-encapsulating silica capsules from collapsing due to fiber friction. Examples of component (c2) include polyhydric alcohols having from 2 to 8 carbon atoms and from 2 to 6 carbon atoms, such as ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, and glycerin, and glycol ethers having from 4 to 12 carbon atoms, such as diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, and tripropylene glycol. From the viewpoint of preventing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction, propylene glycol and butylene glycol are preferred. Examples of component (c3) include diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, 3-methoxy-3-methyl-1-butanol, 1-methylglyceryl ether, 2-methylglyceryl ether, 1,3-dimethylglyceryl ether, 1-ethylglyceryl ether, 1,3-diethylglyceryl ether, 1-pentylglyceryl ether, and 2-pentylglyceryl ether. From the viewpoint of preventing disintegration of the functional agent-encapsulating silica capsules due to fiber friction, diethylene glycol monobutyl ether is preferred. Examples of component (c4) include aromatic ethers of glycols such as phenoxyethanol, diethylene glycol monophenyl ether, triethylene glycol monophenyl ether, polyethylene glycol monophenyl ether having an average molecular weight of approximately 480, 2-benzyloxyethanol, and diethylene glycol monobenzyl ether, and from the viewpoint of preventing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction, phenoxyethanol and diethylene glycol monophenyl ether are preferred.

[0082] From the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, component (C) is preferably one or more selected from phenoxyethanol, diethylene glycol monobutyl ether, ethanol, ethylene glycol, propylene glycol, and butylene glycol, and more preferably one or more selected from ethanol, phenoxyethanol, diethylene glycol monobutyl ether, ethylene glycol, and propylene glycol.

[0083] When the treatment liquid of the present invention contains component (C), the concentration of component (C) in the treatment liquid of the present invention may be, from the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, preferably 1 ppm or more, more preferably 10 ppm or more, even more preferably 50 ppm or more, and preferably 1000 ppm or less, more preferably 500 ppm or less, even more preferably 100 ppm or less.

[0084] The treatment liquid of the present invention may further contain a pH adjuster from the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, although the pH adjuster does not include the pH adjuster encapsulated in component (A). pH adjusters include: (1) Acidic agents such as inorganic acids such as hydrochloric acid and sulfuric acid, and organic acids such as p-toluenesulfonic acid, (o-, m-, p-)xylenesulfonic acid, citric acid, succinic acid, malic acid, fumaric acid, tartaric acid, malonic acid, and maleic acid, and (2) Alkaline agents such as sodium hydroxide, potassium hydroxide, ammonia and its derivatives, amine salts such as monoethanolamine, diethanolamine, and triethanolamine, sodium carbonate, potassium carbonate, etc. Examples of compounds include compounds selected from the following:

[0085] From the viewpoint of suppressing the disintegration of the functional agent-encapsulating silica capsules due to fiber friction, the pH of the treatment solution of the present invention is preferably 6 or more, more preferably 7 or more, even more preferably 7.5 or more, and preferably 10 or less, more preferably 9.5 or less, even more preferably 9 or less. The pH of the treatment solution at 25°C may be within the above range. The pH is measured according to the pH measurement method described below.

[0086] [pH measurement method] A pH measurement combination electrode (HORIBA 9615S Measurement Method Model JF15) is connected to a pH meter (HORIBA pH / Ion Meter D-71) and the power is turned on. A saturated potassium chloride aqueous solution (3.33 mol / L) is used as the pH electrode internal solution. Next, 100 mL of pH 4.01 standard solution (phthalate standard solution), pH 6.86 (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution) are each filled into 100 mL beakers and immersed in a thermostatic bath at 25°C for 30 minutes. The pH measurement electrode is immersed in the thermostatically adjusted standard solutions for 3 minutes, and calibration is performed in the following order: pH 6.86 → pH 9.18 → pH 4.01. The sample to be measured is adjusted to 25°C, and the pH meter electrode is immersed in the sample and the pH is measured after 3 minutes.

[0087] The treatment solution of the present invention may optionally contain antibacterial agents, bleaching agents, bleach activators, viscosity modifiers, defoamers, preservatives, stain repellents, dyes, enzymes, polymers, silicones, and the like.

[0088] [Fiber processing method] The textile treatment method of the present invention will be described in more detail. The textile treatment method of the present invention may be a textile finishing method, a textile softening method, or a textile washing method. The textile treatment method of the present invention may be a method for treating textile products by contacting the textile product with the treatment liquid of the present invention, or may be a method for treating textile products with the treatment liquid of the present invention. The method for treating textile products of the present invention may be a method for finishing textile products, a method for imparting softness to textile products, or a method for washing textile products. After treating the fibers or textile products with the fiber treatment method of the present invention, the fibers or textile products may be rinsed with water. In the fiber treatment method of the present invention, the treatment liquid of the present invention can be preferably used. Specific examples and preferred embodiments of the components (A) to (C) are also the same.

[0089] In the fiber treatment method of the present invention, the mass ratio (B) / (A) of the content of component (B) to the content of component (A) in the treatment solution is 0.5 or more, preferably 0.6 or more, more preferably 0.7 or more, even more preferably 0.8 or more, from the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction, and is 40 or less, preferably 30 or less, more preferably 25 or less, even more preferably 20 or less.

[0090] The fibers and textile products targeted by the fiber treatment method of the present invention may be either hydrophobic or hydrophilic. Examples of hydrophobic fibers include protein-based fibers (such as milk protein casein fiber and Promix), polyamide-based fibers (such as nylon), polyester-based fibers (such as polyester), polyacrylonitrile-based fibers (such as acrylic), polyvinyl alcohol-based fibers (such as vinylon), polyvinyl chloride-based fibers (such as polyvinyl chloride), polyvinylidene chloride-based fibers (such as vinylidene), polyolefin-based fibers (such as polyethylene and polypropylene), polyurethane-based fibers (such as polyurethane), polyvinyl chloride / polyvinyl alcohol copolymer-based fibers (such as polycloral), polyalkylene paraoxybenzoate-based fibers (such as benzoate), polyfluoroethylene-based fibers (such as polytetrafluoroethylene), glass fibers, carbon fibers, alumina fibers, silicone carbide fibers, rock fibers, slag fibers, and metal fibers (gold thread, silver thread, steel fiber). Examples of hydrophilic fibers include seed hair fibers (cotton, kapok, etc.), bast fibers (hemp, flax, ramie, hemp, jute, etc.), leaf vein fibers (Manila hemp, sisal, etc.), palm fibers, rush, straw, animal hair fibers (wool, mohair, cashmere, camel hair, alpaca, vicuna, angora, etc.), silk fibers (domestic silk, wild silk), feathers, and cellulosic fibers (rayon, polynosic, cupra, acetate, etc.).

[0091] Examples of textile products include fabrics such as woven fabrics, knitted fabrics, and nonwoven fabrics using the hydrophobic fibers or hydrophilic fibers, and products obtained using the same, such as undershirts, T-shirts, dress shirts, blouses, slacks, hats, handkerchiefs, towels, knitwear, socks, underwear, tights, and masks.

[0092] Hereinafter, a detailed description will be given of specific examples of treating textile products with the treatment liquid of the present invention, but the method of treating textiles of the present invention is not limited to the following embodiments. An example of a method for treating a textile product with the treatment liquid of the present invention is a method in which the textile product is immersed in the treatment liquid of the present invention. Here, "immersion" refers to a state in which the textile product is immersed in the treatment liquid of the present invention. When treating a textile product by immersion treatment, the textile product may be treated while being stirred.

[0093] The textile product treatment method of the present invention allows for hand washing of textile products containing a treatment solution. Examples of hand washing methods include rubbing the textile products with hands, pushing the textile products, and rubbing the textile products together with hands.

[0094] In the textile product treatment method of the present invention, the textile product can be treated in a washing machine. Examples of washing machines include vertical washing machines, two-tier washing machines, drum washing machines, pulsator washing machines, agitator washing machines, and small washing machines. These washing machines can be commercially available for home use.

[0095] From the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, the concentration of component (A) in the treatment liquid of the present invention may be preferably 1 ppm or more, more preferably 5 ppm or more, even more preferably 40 ppm or more, still more preferably 80 ppm or more, and preferably 1000 ppm or less, more preferably 800 ppm or less, even more preferably 400 ppm or less.

[0096] From the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, the concentration of component (B) in the treatment solution of the present invention may be preferably 1 ppm or more, more preferably 10 ppm or more, even more preferably 80 ppm or more, still more preferably 150 ppm or more, and preferably 1000 ppm or less, more preferably 800 ppm or less, even more preferably 600 ppm or less, and still more preferably 300 ppm or less.

[0097] When the treatment liquid of the present invention contains component (C), the concentration of component (C) in the treatment liquid of the present invention may be, from the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction, preferably 1 ppm or more, more preferably 10 ppm or more, even more preferably 50 ppm or more, and preferably 1000 ppm or less, more preferably 500 ppm or less, even more preferably 100 ppm or less.

[0098] The temperature of the treatment liquid is preferably 0°C or higher, more preferably 3°C or higher, even more preferably 5°C or higher, and preferably 40°C or lower, more preferably 35°C or lower, from the viewpoint of preventing the collapse of the functional agent-encapsulated silica capsules due to fiber friction.

[0099] The treatment time is preferably 2 minutes or more, more preferably 3 minutes or more, and preferably 60 minutes or less, more preferably 45 minutes or less, from the viewpoint of preventing the functional agent-encapsulating silica capsules from collapsing due to fiber friction.

[0100] The bath ratio, which is the ratio of the mass (kg) of the textile product to the amount (liters) of the treatment liquid, i.e., the amount (liters) of the treatment liquid / mass (kg) of the textile product (hereinafter, this ratio may be referred to as the bath ratio), is preferably 2 or more, more preferably 3 or more, even more preferably 4 or more, still more preferably 5 or more, from the viewpoint of suppressing the collapse of the functional agent-encapsulated silica capsules due to fiber friction, and is preferably 40 or less, more preferably 30 or less, and even more preferably 20 or less.

[0101] In the textile product treatment method of the present invention, rinsing can be performed after washing the textile product with the treatment solution of the present invention. In the present invention, rinsing refers to a process in which the textile product containing the treatment solution is brought into contact with fresh water to reduce the amount of the components of the present invention carried over with the treatment solution contained in the textile product. The temperature and amount of water used in rinsing may be the same as or different from the water used in the treatment operation of the present invention. Rinsing can be performed multiple times.

[0102] The temperature of the rinse water is preferably 5°C or higher, more preferably 10°C or higher, and preferably 40°C or lower, more preferably 30°C or lower, from the viewpoint of preventing the disintegration of the functional agent-encapsulating silica capsules due to friction with the fibers.

[0103] In addition, in this method, the treatment time is preferably 1 minute or more, more preferably 2 minutes or more, and preferably 30 minutes or less, more preferably 20 minutes or less, and even more preferably 15 minutes or less, from the viewpoint of preventing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction.

[0104] The textile product treated by the textile product treatment method of the present invention may be dehydrated and dried naturally or in a heated dryer. If a better finish is important, the dried textile product may be ironed.

[0105] [Processing liquid kit] The present invention provides a treatment solution kit comprising a first agent containing the component (A) and a second agent containing the component (B). The treatment solution kit may be a finishing treatment solution kit for fibers or textile products, a softening treatment solution kit for fibers or textile products, or a cleaning solution kit for fibers or textile products. Specifically, the treatment liquid kit of the present invention is a kit configured to contain a first agent containing component (A) and a second agent containing component (B) in separate states. In the treatment solution kit of the present invention, the components are stored in separate containers that allow for storage and are mixed at the time of use. In particular, a kit in which a first agent containing component (A) (preferably substantially free of component (B)) and a second agent containing component (B) (preferably substantially free of component (A)) are filled in separate containers is preferred. The treatment liquid of the present invention is prepared by mixing a first agent containing the component (A) with a second agent containing the component (B) using the treatment liquid kit of the present invention. The treatment solution kit of the present invention can be applied appropriately to the aspects described in the treatment solution of the present invention and the fiber treatment method of the present invention. Specific examples and preferred embodiments of the components (A) and (B) are the same as those described for the treatment liquid of the present invention.

[0106] The treatment liquid kit of the present invention is prepared by mixing a first agent containing component (A) and a second agent containing component (B) so that the concentration of component (A) in the treatment liquid is preferably 1 ppm or more, more preferably 5 ppm or more, even more preferably 40 ppm or more, still more preferably 80 ppm or more, and preferably 1000 ppm or less, more preferably 800 ppm or less, and even more preferably 400 ppm or less, from the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction.

[0107] The treatment liquid kit of the present invention is prepared by mixing a first agent containing component (A) and a second agent containing component (B) so that the concentration of component (B) in the treatment liquid is preferably 1 ppm or more, more preferably 10 ppm or more, even more preferably 80 ppm or more, still more preferably 150 ppm or more, and preferably 1000 ppm or less, more preferably 800 ppm or less, even more preferably 600 ppm or less, and still more preferably 300 ppm or less, from the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction.

[0108] The treatment liquid kit of the present invention is prepared by mixing a first agent containing the (A) component and a second agent containing the (B) component so that the mass ratio (B) / (A) of the content of the (B) component to the content of the (A) component in the treatment liquid is 0.5 or more, preferably 0.6 or more, more preferably 0.7 or more, even more preferably 0.8 or more, and 40 or less, preferably 30 or less, more preferably 25 or less, even more preferably 20 or less, from the viewpoint of suppressing the disintegration of the functional agent-encapsulated silica capsules due to fiber friction.

[0109] The treatment liquid kit of the present invention preferably contains the component (C) in at least one of the first agent containing the component (A) and the second agent containing the component (B). Specific examples and preferred embodiments of component (C) are the same as those described for the treatment liquid of the present invention.

[0110] The kit for the treatment liquid of the present invention preferably contains water in at least one of a first agent containing component (A) and a second agent containing component (B).

[0111] The kit for the treatment liquid of the present invention can be applied to a two-agent type treatment agent composition which is stored in a container capable of storing components separately and mixed and used at the time of use. Further, the kit for the treatment liquid of the present invention can be suitably used for fiber products.

Examples

[0112] <Examples and Comparative Examples> Using the following compounding components, the treatment liquids shown in Tables 2 to 3 were prepared, and using the obtained treatment liquids, the evaluation of the capsule disintegration rate was carried out by the following method.

[0113] <Compounding Components> In Examples and Comparative Examples, the following components were used. <Component (A)> · A-1: Flavor-encapsulated silica capsules (1) manufactured by the following method

[0114] <Manufacturing Method of A-1> (Step 1) 3.0 g of Cotamine 60W (trade name, manufactured by Kao Corporation, cetyltrimethylammonium chloride, active ingredient 30% by mass) was diluted with 750 g of ion-exchanged water to obtain an aqueous phase component. To this aqueous phase component, an oil phase component prepared by mixing 200 g of model flavor A shown in Table 1 and 50 g of tetraethoxysilane (hereinafter also referred to as "TEOS") was added, and the mixture was emulsified at a rotation speed of 8,500 rpm using a homomixer (manufactured by HsiangTai, model: HM-310, the same hereinafter) to obtain an emulsion. The volume average particle diameter of the emulsion droplets at this time was 1.4 μm. After adjusting the pH of the obtained emulsion to 3.8 using a 1% sulfuric acid aqueous solution, it was transferred to a separable flask equipped with a stirring blade and a cooler, and while maintaining the liquid temperature at 30 ° C, it was stirred at 200 rpm for 24 hours to obtain an aqueous dispersion containing silica capsules having a core made of model flavor A and a first shell made of silica.

[0115] (Process 2) While stirring the aqueous dispersion obtained in step 1 at a liquid temperature of 30°C, 21 g of TEOS was added dropwise over 420 minutes. After the addition, stirring was continued for an additional 17 hours, followed by cooling. A second shell encapsulating the first shell was formed, yielding an aqueous dispersion containing silica capsules in which model fragrance A was encapsulated by amorphous silica. The volume-average particle size of the silica capsules was 2.1 μm. The volume-average particle size of the emulsified droplets and silica capsules (I) was measured using a laser diffraction / scattering particle size distribution analyzer "LA-960" (trade name, manufactured by Horiba, Ltd.). Measurements were performed using a flow cell, with the medium set to water and the refractive index set to 1.40-0i. The emulsion or aqueous dispersion containing silica capsules was added to the flow cell, and measurements were performed at a concentration that showed a transmittance of approximately 90%, to determine the volume-average particle size. The thickness of the first shell was approximately 5 nm, and the thickness of the second shell was 5 to 30 nm.

[0116] [Table 1]

[0117] <(B) component> (B1-1-1): Sodium linear alkylbenzenesulfonate (alkyl composition: C10 / C11 / C12 / C13 = 11 / 29 / 34 / 26 (mass ratio), mass average carbon number of the entire compound = 17.75) (B1-2-1): Potassium salt of internal olefin sulfonate (C18IOS) having 18 carbon atoms. The mass ratio of the olefin form (potassium olefin sulfonate) to the hydroxy form (potassium hydroxyalkanesulfonate) in the C18IOS is 16 / 84. The mass ratio of the sulfonic acid group positions of the HAS form in the C18IOS is as follows: 1st position / 2nd position / 3rd position / 4th position / 5th position / 6th to 9th position = 1.5 / 22.1 / 17.2 / 21.8 / 13.5 / 23.9. The mass ratio of (IO-1S) / (IO-2S) is 1.6. The positional distribution of sulfonic acid groups in the HAS form contained in the C18IOS was measured using a liquid chromatograph mass spectrometer (hereinafter abbreviated as LC-MS). However, for internal olefin sulfonates with double bonds at positions 6 and above, the peaks overlapped and could not be clearly separated. The equipment and analytical conditions used for the measurement were as follows: [Measuring equipment] LC device: "LC-20ASXR" (Shimadzu Corporation) LC-MS device: "LCMS-2020" (manufactured by Shimadzu Corporation) Column: ODS Hypersil (length: 250 mm, inner diameter: 4.6 mm, particle size: 3 μm, manufactured by Thermo Fisher Scientific) Detector: ESI (-), m / z = 349.15 (C18), 321.10 (C16), 293.05 (C14) 〔solvent〕 Solvent A: 10 mM ammonium acetate aqueous solution Solvent B: acetonitrile / water = 95 / 5 solution with 10 mM ammonium acetate added [Elution conditions] Gradient: 60% solvent A, 40% solvent B (0-15 min) → 30% solvent A, 70% solvent B (15.1-20 min) → 60% solvent A, 40% solvent B (20.1-30 min) Flow rate: 0.5ml / min Column temperature: 40℃ Injection volume: 5 μl

[0118] (B1-3-1) Lauric acid (B1-3-2) Myristic acid (B1-3-3) Palmitic acid (B1-4-1) Sodium dodecyl sulfate (Fujifilm Wako Pure Chemical Industries, Ltd.) (B1-4-2) Sodium polyoxyethylene dodecyl ether sulfate (EO addition mole number: 2) (B1-4-3) Sodium polyoxyethylene dodecyl ether sulfate (EO addition mole number: 4)

[0119] (B2-1-1) In the general formula (b2-1), R 5is a lauryl group, and m is an average of 10, (B2-2-1) In the general formula (b2-2), R 6 is a lauryl group, p is an average of 3.7, and q is an average of 16.5, (B2-3-1) Softanol 70H (manufactured by Nippon Shokubai Co., Ltd.) (a polyoxyethylene alkyl ether obtained by adding an average of 7 moles of ethylene oxide to a secondary alcohol having 12 to 14 carbon atoms) (B2-4-1) Fatty acid methyl ester ethoxylate (fatty acid having 16 to 18 carbon atoms, average number of ethyleneoxy groups added: 15)

[0120] <(C) component> C-1: Propylene glycol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. C-2: Diethylene glycol monobutyl ether, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. C-3: Ethanol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.

[0121] <Optional ingredients> Thickener: hydrogenated castor oil, iodine value 1.5g-I2 / 100g Antifoaming agent: DOWSIL AC8066 Antifoam, manufactured by Dow Corning Toray Co., Ltd. pH adjuster: citric acid, monoethanolamine <Water> Water prepared by adding calcium chloride and magnesium chloride to Wakayama City water in a mass ratio of 8:2 to adjust the hardness to 4°dH.

[0122] <Preparation of textile products for evaluating capsule disintegration rate> 1.7 kg of cotton fabric (Cotton 2003 (Tanigashouten)) was washed twice in a fully automatic washing machine (National NA-F702P) on the standard cycle (using 4.7 g of Emulgen 108 (Kao Corporation) in 47 L of water, washing for 9 minutes, rinsing twice, and spin-drying for 3 minutes), then washed three times in water only (47 L of water, washing for 9 minutes, rinsing twice, and spin-drying for 3 minutes), and dried for 24 hours at 23°C and 45% RH. It was then cut into 6 cm x 6 cm pieces.

[0123] <Preparation of processing solution> Using the above components, treatment solutions shown in Tables 2 and 3 were prepared. Specifically, the treatment solutions were prepared by preparing compositions in which each component was diluted with water to a range in which handling such as viscosity was not an issue, and then adding 500 ml of water to a 1-liter glass beaker, and adding the compositions in which each component had been diluted with water to the water to give the compositions shown in Tables 2 and 3.

[0124] <Capsule disintegration rate measurement> (1) Examples 1 to 22 and Comparative Examples 1 to 5 The textile product for evaluation was treated using a Tergotometer (manufactured by Ueshima Seisakusho). 0.6 L of the treatment solution shown in Tables 2 and 3 was placed in a 1-liter stainless steel beaker. The temperature of the treatment solution was 20°C. The textile for evaluation was treated in the Tergotometer at 85 rpm for 10 minutes. After this treatment, approximately 400 ml of the treatment solution was collected in a beaker and filtered using a membrane filter Durapore HVLP04700 (0.45 μm mesh, manufactured by Merck) with a suction filtration device (VT-500, manufactured by Advantec Co., Ltd.), and the weight of the filtrate was measured. Undisintegrated capsules were collected on the membrane filter. 1 ml of the filtrate was measured and mixed with 9 ml of acetone containing 10 μg / ml of benzyl benzoate as an internal standard. The amount of flavoring contained in this solution was measured using the following measuring equipment: gas chromatography fractionation and mass spectrometry. After correcting for the weight of the filtrate, the capsule disintegration rate was calculated from the ratio to the amount added. The lower the capsule disintegration rate, the better the capsule disintegration inhibition ability. Capsule disintegration rate (%) = [(weight of flavor in the filtrate determined by gas chromatography) / (weight of flavor added)] x 100

[0125] [Measuring equipment] GC device: "Agilent Technologies7890B" (manufactured by Agilent) MS device: "Agilent Technologies 5977A" (Agilent) Column: DB-WAX (length: 30 m, inner diameter: 0.25 mm, film thickness: 0.25 μm, manufactured by Agilent) Inlet temperature: 240℃ Injection method: Splitless Injection volume: 1μl Temperature: 40℃ → 12.5℃ / min temperature increase → 240℃ (14min) Carrier gas: Helium Average linear velocity 51cm / min MS temperature: ion source 230℃, quadrupole temperature 150℃ Ionization method: EI Capture mode: SIM

[0126] (2) Examples 23 and 24, Comparative Example 6 In the measurement of the capsule disintegration rate in (1) above, the temperature of the treatment liquid was adjusted to 40°C, and the fibers for evaluation were treated using this treatment liquid in the same manner as in (1) above, after which the capsule disintegration rate was evaluated.

[0127] [Table 2]

[0128] [Table 3]

Claims

1. A method for treating fibers, comprising contacting fibers with a treatment liquid containing the following components (A), (B), water, and optionally the following component (C), wherein the concentration of component (A) in the treatment liquid is 1 ppm or more and 1,000 ppm or less, the concentration of component (B) in the treatment liquid is 1 ppm or more and 1,000 ppm or less, and when component (C) is contained, the concentration of component (C) in the treatment liquid is 1 ppm or more and 1,000 ppm or less, the mass ratio of the total content of components other than components (A), (B), (C) and water (excluding hardness components contained in water) contained in the treatment liquid to the content of component (B) in the treatment liquid is 0.01 or more and 0.09 or less, and the mass ratio (B) / (A) of the content of component (B) to the content of component (A) is 0.5 or more and 40 or less. (A) Component: Silica capsules containing functional agents Component (B): one or more surfactants selected from (B1) anionic surfactants (hereinafter referred to as component (B1)) and (B2) nonionic surfactants (hereinafter referred to as component (B2)). (However, when both components (B1) and (B2) are contained, the mass ratio (B1) / (B2) of the content of component (B1) to the content of component (B2) is greater than 0 and equal to or less than 2.) Component (C): an organic solvent having a hydroxyl group (excluding the organic solvent having a hydroxyl group encapsulated in component (A)).

2. The method for treating fibers according to claim 1, wherein the component (B1) is one or more selected from the following components (b1-1) to (b1-5): Component (b1-1): a sulfonic acid or a salt thereof represented by the following general formula (b1-1): R １ -B-SO ３ M (b1-1) [In formula (b1-1), R １ represents an alkyl group or an alkenyl group having 3 to 21 carbon atoms, B represents a benzene ring, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium. １ The sulfonic acid group is bonded to the ortho, meta, or para position. Component (b1-2): Internal olefin sulfonic acid or its salt having 14 to 24 carbon atoms Component (b1-3): a fatty acid having 10 to 20 carbon atoms or a salt thereof Component (b1-4): a sulfate ester or a salt thereof represented by the following general formula (b1-4): R ２ -O-[(POO) ｍ / (EO) ｎ ]-SO ３ M (b1-4) [In formula (b1-4), R ２ represents an alkyl or alkenyl group having from 8 to 22 carbon atoms, the carbon atom bonded to the oxygen atom is the first carbon atom, PO represents a propyleneoxy group, EO represents an ethyleneoxy group, EO and PO may be bonded in a block or random manner, / is a symbol indicating that the bonding order of PO and EO does not matter, m and n represent the average number of moles added, m is from 0 to 5 and n is from 0 to 16, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium or an organic ammonium. Component (b1-5): an α-sulfofatty acid ester represented by the following general formula (b1-5) or a salt thereof R ３ -CH(SO ３ M)COOR ４ (b1-5) [In formula (b1-5), R ３ represents an alkyl or alkenyl group having 6 to 20 carbon atoms, R ４ represents an alkyl group having 1 to 6 carbon atoms, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal (1 / 2 atom), ammonium, or an organic ammonium.

3. The method for treating fibers according to claim 1 or 2, wherein the component (B2) is one or more selected from the following components (b2-1) to (b2-4): Component (b2-1): a compound represented by the following general formula (b2-1): 2 ５ --(EO) ｍ -2 (2-1) [In the formula, R ５ represents a primary alkyl group or a primary alkenyl group having 8 to 20 carbon atoms, EO represents an ethyleneoxy group, and m represents the average number of moles added, which is 2 to 50. Component (b2-2): a compound represented by the following general formula (b2-2): 2 ６ --[(O) ｐ / (59) ｑ )-2 hb2-2) [In the formula, R ６ represents an alkyl or alkenyl group having from 8 to 20 carbon atoms, EO represents an ethyleneoxy group, PO represents a propyleneoxy group, EO and PO are bonded in a block or random manner, / represents the symbol indicating that the bonding order of PO and EO does not matter, p represents the average number of moles of PO added and is from 0.1 to 20, and q represents the average number of moles of EO added and is from 4 to 25. Component (b2-3): a nonionic surfactant in which ethylene oxide is added to a secondary alcohol, and is a compound represented by the following general formula (b2-3): 2 ７ --(EO) ｓ -2 (2-3) [In the formula, R ７ represents a secondary alkyl group or a secondary alkenyl group having 8 to 24 carbon atoms, EO represents an ethyleneoxy group, and s represents the average number of moles added, which is a number of 3 to 24. Component (b2-4): fatty acid methyl ester alkoxylate having from 8 to 24 carbon atoms

4. The method for treating fibers according to any one of claims 1 to 3, further comprising the component (C).

5. The method for treating fibers according to claim 4, wherein the component (C) is one or more selected from the following components (c1) to (c4): Component (c1): a monohydric alcohol having 2 to 6 carbon atoms Component (c2): an alcohol having 2 to 12 carbon atoms and a valence of 2 to 12; Component (c3): an organic solvent having a hydrocarbon group, an ether group, and a hydroxyl group, with 1 to 8 carbon atoms (however, the hydrocarbon group does not include aromatic groups). Component (c4): an organic solvent having an aromatic group, an ether group, and a hydroxyl group, which may be partially substituted

6. The method for treating fibers according to claim 5 , wherein the component (C) is one or more types including the component (c2).

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