Colored dispersion

Abstract

Provided is a colored dispersion which comprises water and a colorant comprising a compound represented by formula (1) and a compound represented by formula (2), wherein the colorant, in analysis by high-performance liquid chromatography, satisfies the relationship ((A) / (B))<0.028, where (A) is the area of a peak assignable to the compound represented by formula (1) and (B) is the area of a peak assignable to the compound represented by formula (2).

Description

Technical Field

[0001] The present invention relates to a colored dispersion liquid.

Background Art

[0002] In recent years, a recording method for performing inkjet printing without a printing plate has been proposed, and inkjet printing (inkjet printing) is also performed in the printing of fibers including cloth and the like. Inkjet printing for printing has various advantages such as being plate-free; resource-saving; energy-saving; and being easy to express high definition compared to conventional printing methods such as screen printing.

[0003] Here, hydrophobic fibers represented by polyester fibers are generally dyed with water-insoluble color materials. Therefore, as an aqueous ink for printing hydrophobic fibers by inkjet printing, it is generally necessary to use a dispersion ink in which a water-insoluble color material is dispersed in water and has good performance such as dispersion stability.

[0004] The inkjet printing method for hydrophobic fibers is roughly classified into a direct printing method and a sublimation transfer method. The direct printing method is a printing method in which ink is directly applied (printed) to hydrophobic fibers, and then the dye in the ink is dyed on the hydrophobic fibers by heat treatment such as high-temperature steaming. On the other hand, the sublimation transfer method is a printing method in which ink is applied (printed) to an intermediate recording medium (such as a dedicated transfer paper), and then after the ink application surface of the intermediate recording medium and the hydrophobic fibers are overlapped, the dye is transferred from the intermediate recording medium to the hydrophobic fibers by heat.

[0005] Sublimation transfer is primarily used for printing banners and other similar items. The ink used contains easily sublimable dyes that are highly suitable for transfer to hydrophobic fibers through heat treatment. The processing involves two steps: (1) printing: applying dye ink to an intermediate recording medium using an inkjet printer, and (2) transfer: transferring and dyeing the dye from the intermediate recording medium to the fibers through heat treatment. Since commercially available transfer paper can be widely used, pre-treatment of the fibers is not required, and the washing step is also omitted.

[0006] For sublimation transfer inks, aqueous inks, which are in which water-insoluble dyes are dispersed in water, are commonly used. For example, Patent Document 1 describes preparing an aqueous ink by adding a water-soluble organic solvent as a humectant (anti-drying agent), a surfactant as a surface tension modifier, and other additives (pH adjusters, preservatives and antifungal agents, defoamers, etc.) to a dye dispersion obtained by dispersing a water-insoluble dye selected from disperse dyes and oil-soluble dyes in water with a dispersant, and optimizing the physical properties (physical properties) such as particle size, viscosity, surface tension, and pH. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] International Publication No. 2005 / 121263 [Overview of the project] [Problems that the invention aims to solve]

[0008] However, when the inventors investigated conventional water-based inks in which water-insoluble dyes are dispersed in water, they found that, depending on the type of water-insoluble dye, there is room for improvement in the storage stability and filterability after storage of the water-based ink.

[0009] The present invention aims to provide a colored dispersion liquid that exhibits excellent storage stability and filterability after storage. [Means for solving the problem]

[0010] The following embodiments are specific means for solving the above problems. 1) A coloring agent containing the compound represented by the following formula (1) and the compound represented by the following formula (2), and water. A colored dispersion in which, when the colorant is analyzed by high-performance liquid chromatography (HPLC), the peak area (A) of the compound represented by the following formula (1) and the peak area (B) of the compound represented by the following formula (2) satisfy the relationship ((A) / (B)) < 0.028. [ka]

[0011] 2) Furthermore, the colored dispersion according to 1) contains an anionic dispersant.

[0012] 3) The colored dispersion according to 2), wherein the anionic dispersant is a sodium naphthalene sulfonate formalin condensate.

[0013] 4) The colored dispersion according to 3), wherein the sodium naphthalene sulfonate formalin condensate is a formalin condensate of creosote oil sulfonic acid.

[0014] 5) Furthermore, a colored dispersion according to any one of items 1) to 4), which contains a phytosterol compound. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a colored dispersion liquid that exhibits excellent storage stability and filterability after storage. [Modes for carrying out the invention]

[0016] The following describes in detail specific embodiments to which the present invention is applied. In this specification, "CI" is an abbreviation for Color Index.

[0017] <Coloring dispersion liquid> The coloring dispersion liquid according to this embodiment contains a colorant containing a compound represented by a specific formula (1) and a compound represented by a specific formula (2), and water. Hereinafter, the components contained in the coloring dispersion liquid according to this embodiment will be described in detail. Each of the components described below may be used alone or in combination of two or more.

[0018] [Colorant] The colorant contains a compound represented by the following formula (1) and a compound represented by the following formula (2).

[0019] [Chemical formula]

[0020] Particularly, in this embodiment, when the colorant is analyzed by high performance liquid chromatography (HPLC), the peak area (A) of the compound represented by the above formula (1) and the peak area (B) of the compound represented by the above formula (2) satisfy the relationship of ((A) / (B)) < 0.028. By satisfying the relationship of ((A) / (B)) < 0.028 for the content ratio of the compound represented by the above formula (1) and the compound represented by the above formula (2), the storage stability and the filtration property after storage of the coloring dispersion liquid tend to be good. The content ratio of the compound represented by the above formula (1) and the compound represented by the above formula (2) preferably satisfies the relationship of ((A) / (B)) < 0.027, more preferably satisfies the relationship of ((A) / (B)) < 0.024, still more preferably satisfies the relationship of 0.001 ≦ ((A) / (B)) < 0.024, particularly preferably satisfies the relationship of 0.004 ≦ ((A) / (B)) ≦ 0.020, and extremely preferably satisfies the relationship of 0.006 ≦ ((A) / (B)) ≦ 0.014.

[0021] As a method for analyzing the colorant by HPLC, for example, the method described in the examples described later can be adopted.

[0022] The method for obtaining a colorant in which the content ratio of the compound represented by formula (1) and the compound represented by formula (2) satisfies the above relationship is not particularly limited. For example, it is possible to blend the compound represented by formula (1) and the compound represented by formula (2) in such a way that the above relationship is satisfied.

[0023] Alternatively, a formulation containing the compound represented by formula (1) and the compound represented by formula (2) may be purified by a known purification method, and the content ratio may be adjusted.

[0024] The purification method is not particularly limited, and conventional methods such as extraction (solid-liquid extraction, liquid-liquid extraction, reflux extraction, Soxhlet extraction, etc.), immersion, and stirring can be used. These methods may be used individually or in combination of two or more; for example, solid-liquid extraction and liquid-liquid extraction may be combined. When combining two or more methods, the order in which the methods are used can be arbitrarily set according to the purpose, such as extraction efficiency.

[0025] When performing solid-liquid extraction, an organic solvent can be used as the extraction solvent. The organic solvent may be hydrophilic or hydrophobic. Examples of extraction solvents include monovalent, divalent, or polyvalent alcohols and their aqueous solutions; ketones such as acetone and methyl ethyl ketone; esters such as methyl acetate and ethyl acetate; chain ethers such as diethyl ether; saturated or unsaturated hydrocarbons such as pentane and hexane; aromatic hydrocarbons such as benzene and toluene; halogenated hydrocarbons such as dichloromethane, chloroform, dichloroethane, and carbon tetrachloride; carbon dioxide and supercritical carbon dioxide; edible oils such as rapeseed oil and soybean oil; and fats and oils such as diacylglycerol (DAG), medium-chain fatty acid oil, squalane, and squalene. These extraction solvents may be used individually or in combination of two or more. Among these extraction solvents, methanol, ethanol, and isopropyl alcohol are preferred.

[0026] The conditions for solid-liquid extraction are not particularly limited as long as sufficient extraction can be achieved. For example, the amount of extraction solvent used is preferably 1 to 100 mL per 1 g of the compound. The extraction time is usually longer if the solvent is at a low temperature, but it may be shorter if the solvent is at a higher temperature. The extraction operation may also be performed two or more times. Preferred extraction conditions include, for example, two extractions performed at 10 to 50°C for 1 to 2 hours each.

[0027] The method for separating the solid in solid-liquid extraction is not particularly limited; for example, it can be separated and recovered by filtration using a Buchner funnel and filter paper. In this case, the purification effect can be further enhanced by adding the extraction solvent to the cake in the Buchner funnel.

[0028] Since the extraction solvent usually remains in the cake after the above extraction operation, an additional step to remove the solvent may be taken. Methods for removing the solvent include, for example, removing the solvent under reduced pressure; suspending the cake in water and filtering it; or adding water to the cake and filtering it.

[0029] From the viewpoint of ensuring flexibility in composition during the preparation of the colored dispersion and the stability of the colored dispersion, the content of the compound represented by formula (2) above is preferably 0.1 to 30% by mass, more preferably 0.5 to 25% by mass, and even more preferably 1 to 20% by mass, relative to the total amount of the colored dispersion.

[0030] [water] As for the water, water with few impurities, such as deionized water, distilled water, or ultrapure water, is preferable. The water content is selected appropriately depending on the application. The water content is usually 200 to 8500 parts by mass per 100 parts by mass of coloring agent.

[0031] [Dispersant] The colored dispersion according to this embodiment preferably further contains a dispersant. The dispersant is not particularly limited, but it is preferable to include at least one selected from the group consisting of styrene-(meth)acrylic copolymer, formalin condensate of aromatic sulfonic acid or a salt thereof, polyoxyethylene arylphenyl ether, polyoxyethylene arylphenyl ether sulfate, and polyoxyethylene naphthyl ether.

[0032] Styrene-(meth)acrylic copolymers are copolymers of styrene monomers and (meth)acrylic monomers. Specific examples of copolymers include (α-methyl)styrene-acrylic acid copolymer, (α-methyl)styrene-acrylic acid-acrylic acid ester copolymer, (α-methyl)styrene-methacrylic acid copolymer, (α-methyl)styrene-methacrylic acid-acrylic acid ester copolymer, (α-methyl)styrene-acrylic acid ester-(anhydride) maleic acid copolymer, acrylic acid ester-styrene sulfonic acid copolymer, and (α-methyl)styrene-methacrylic sulfonic acid copolymer. In this specification, "(meth)acrylic" is used to include "acrylic" and "methacrylic". Similarly, "(α-methyl)styrene" is used to include "α-methylstyrene" and "styrene".

[0033] The mass-average molecular weight of the styrene-(meth)acrylic copolymer is preferably, for example, 1,000 to 20,000, more preferably 2,000 to 19,000, and even more preferably 5,000 to 17,000. The mass-average molecular weight of the styrene-(meth)acrylic copolymer can be measured by GPC (gel permulation chromatography).

[0034] The acid value of the styrene-(meth)acrylic copolymer is preferably, for example, 50 to 250 mg KOH / g, more preferably 100 to 250 mg KOH / g, and even more preferably 150 to 250 mg KOH / g. Setting the acid value to 50 mg KOH / g or higher tends to improve solubility in water and improve dispersion stabilization with colorants. Setting the acid value to 250 mg KOH / g or lower tends to suppress blurring of printed images due to increased affinity with aqueous media. The acid value of the resin represents the number of mg of KOH required to neutralize 1 g of resin and can be measured according to JIS-K3054.

[0035] The glass transition temperature of the styrene-(meth)acrylic copolymer is preferably, for example, 45 to 135°C, more preferably 55 to 120°C, and even more preferably 60 to 110°C.

[0036] Examples of commercially available styrene-(meth)acrylic copolymers include Joncryl 67, 678, 680, 682, 683, 690, 52J, 57J, 60J, 63J, 70J, JDX-6180, HPD-196, HPD96J, PDX-6137A, 6610, JDX-6500, JDX-6639, PDX-6102B, and PDX-6124 (all manufactured by BASF). Among these, Joncryl 67 (weight-average molecular weight: 12500, acid value: 213 mgKOH / g), 678 (weight-average molecular weight: 8500, acid value: 215 mgKOH / g), 682 (weight-average molecular weight: 1700, acid value: 230 mgKOH / g), 683 (weight-average molecular weight: 4900, acid value: 215 mgKOH / g), and 690 (weight-average molecular weight: 16500, acid value: 240 mgKOH / g) are preferred, with Joncryl 678 being more preferred.

[0037] Examples of formalin condensates of aromatic sulfonic acids or their salts include creosote oil sulfonic acid, cresol sulfonic acid, phenol sulfonic acid, β-naphthalene sulfonic acid, β-naphthol sulfonic acid, β-naphthalene sulfonic acid, benzene sulfonic acid, cresol sulfonic acid, 2-naphthol-6-sulfonic acid, lignin sulfonic acid, and their respective formalin condensates or salts (sodium salts, potassium salts, lithium salts, etc.). Among these, formalin condensates of creosote oil sulfonic acid, β-naphthalene sulfonic acid, lignin sulfonic acid, and methylnaphthalene sulfonic acid or their salts are preferred.

[0038] Formalin condensates of aromatic sulfonic acids can be obtained commercially. For example, a formalin condensate of β-naphthalene sulfonic acid is Demol N (manufactured by Kao Corporation). Formalin condensates of creosote oil sulfonic acid are Demol C (manufactured by Kao Corporation) and the Labellin W series (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.). Formalin condensates of special aromatic sulfonic acids are Demol SN-B (manufactured by Kao Corporation). Formalin condensates of methylnaphthalene sulfonic acid are Labellin AN series (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.). Among these, Demol N, the Labellin AN series, and the Labellin W series are preferred, Demol N and the Labellin W series are more preferred, and the Labellin W series is even more preferred. Examples of lignin sulfonic acid include Vanillex N, Vanillex RN, Vanillex G, and Pearllex DP (all manufactured by Nippon Paper Industries Ltd.). Among these, Vanillex RN, Vanillex N, and Vanillex G are preferred.

[0039] Examples of polyoxyethylene arylphenyl ethers include styrylphenol compounds such as polyoxyethylene monostyrylphenyl ether, polyoxyethylene distyrylphenyl ether, polyoxyethylene tristyrylphenyl ether, and polyoxyethylene tetrastyrylphenyl ether; benzylphenol compounds such as polyoxyethylene monobenzylphenyl ether, polyoxyethylene dibenzylphenyl ether, and polyoxyethylene tripenzylphenyl ether; cumylphenol compounds such as polyoxyethylene cumylphenyl ether; polyoxyethylene naphthylphenyl ether, polyoxyethylene biphenyl ether, and polyoxyethylene phenoxyphenyl ether. Among these, polyoxyethylene distyrylphenyl ether, polyoxyethylene tristyrylphenyl ether, polyoxyethylene dibenzylphenyl ether, polyoxyethylene tripenzylphenyl ether, and polyoxyethylene cumylphenyl ether are preferred.

[0040] The number of repeating polyoxyethylene groups in polyoxyethylene arylphenyl ether is preferably 1 to 30, and more preferably 15 to 30. When the number of repeating groups is 1 or more, the compatibility with aqueous solvents tends to be excellent. Also, when the number of repeating groups is 30 or less, the viscosity tends not to become too high.

[0041] Examples of commercially available polyoxyethylene arylphenyl ethers include the Neugen EA series (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.); Paionin D-6112, Paionin D-6115, Paionin D-6120, Paionin D-6131, Paionin D-6512, Takesurf D-6413, DTD-51, Paionin D-6112, Paionin D-6320 (all manufactured by Takemoto Oil & Fat Co., Ltd.); TS-1500, TS-2000, TS-2600, SM-174N (all manufactured by Toho Chemical Co., Ltd.); Emulgen A60, Emulgen A90, Emulgen A500 (all manufactured by Kao Corporation); Emulgen B-66, Newcol CMP series (all manufactured by Nippon Emulsifier Co., Ltd.).

[0042] Examples of polyoxyethylene arylphenyl ether sulfates include the sulfates of the polyoxyethylene arylphenyl ethers mentioned above.

[0043] Examples of commercially available polyoxyethylene arylphenyl ether sulfates include SM-57, SM-130, and SM-210 (all manufactured by Toho Chemical Co., Ltd.).

[0044] Examples of commercially available polyoxyethylene naphthyl ethers include the Neugen EN series (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) and Paionin D-7240 (manufactured by Takemoto Oil & Fat Co., Ltd.).

[0045] Among the dispersants mentioned above, anionic dispersants such as formalin condensates of aromatic sulfonic acids or their salts are preferred, sodium naphthalene sulfonate formalin condensates are more preferred, and creosote oil sulfonic acid formalin condensates are even more preferred.

[0046] The colored dispersion according to this embodiment may further contain conventionally known nonionic dispersants in addition to those mentioned above. Examples of nonionic dispersants include alkylene oxide adducts of phytosterols, alkylene oxide adducts of cholestanols, polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkylamines, glycerin fatty acid esters, oxyethylene oxypropylene block polymers, and substituted derivatives thereof. Among these, alkylene oxide adducts of phytosterols (also called phytosterol compounds) and alkylene oxide adducts of cholestanols (also called cholestanol compounds) are preferred, and phytosterol compounds are more preferred.

[0047] As alkylene oxide adducts of phytosterols, C2-C4 alkylene oxide adducts of phytosterols are preferred, and ethylene oxide adducts are more preferred. In this specification, "phytosterols" is used to include both "phytosterols" and "hydrogenated phytosterols." For example, ethylene oxide adducts of phytosterols include ethylene oxide adducts of phytosterols and ethylene oxide adducts of hydrogenated phytosterols.

[0048] As alkylene oxide adducts of cholestanols, C2-C4 alkylene oxide adducts of cholestanols are preferred, and ethylene oxide adducts are more preferred. In this specification, "cholestanols" is used to include both "cholestanol" and "hydrogenated cholestanol". For example, ethylene oxide adducts of cholestanols include ethylene oxide adducts of cholestanol and ethylene oxide adducts of hydrogenated cholestanol.

[0049] The amount of alkylene oxide (preferably C2-C4 alkylene oxide, more preferably ethylene oxide) added per mole of phytosterols or cholestanols is preferably around 10 to 50 moles, and the HLB is preferably around 13 to 20.

[0050] Examples of commercially available alkylene oxide adducts of phytosterols include NIKKOL BPS-20, NIKKOL BPS-30 (both manufactured by Nikko Chemicals Co., Ltd., ethylene oxide adducts of phytosterols), and NIKKOL BPSH-25 (same, ethylene oxide adduct of hydrogenated phytosterol). Examples of commercially available alkylene oxide adducts of cholestanols include NIKKOL DHC-30 (manufactured by Nikko Chemicals Co., Ltd., ethylene oxide adduct of cholestanol).

[0051] If the colored dispersion according to this embodiment contains a dispersant, the dispersant content is preferably, for example, 1 to 300 parts by mass, and more preferably 5 to 120 parts by mass, per 100 parts by mass of the colorant.

[0052] [Additives] The colored dispersion according to this embodiment may contain additives other than those listed above. Examples of additives include water-soluble organic solvents, preservatives, surfactants, pH adjusters, chelating reagents, rust inhibitors, water-soluble ultraviolet absorbers, water-soluble polymer compounds, viscosity modifiers, dye dissolving agents, antioxidants, and resin emulsions. The colored dispersion according to this embodiment preferably contains at least one selected from the group consisting of water-soluble organic solvents, preservatives, surfactants, and pH adjusters.

[0053] The content of the water-soluble organic solvent is preferably 0 to 90% by mass, and more preferably 0.01 to 85% by mass, relative to the total amount of the colored dispersion. Furthermore, the total content of other additives is preferably 0 to 50% by mass, and more preferably 0.01 to 10% by mass, relative to the total amount of the colored dispersion.

[0054] Examples of water-soluble organic solvents include glycol-based solvents, polyhydric alcohols, and pyrrolidones. Examples of glycol-based solvents include glycerin, polyglycerin (#310, #750, #800), diglycerin, triglycerin, tetraglycerin, pentaglycerin, hexaglycerin, heptaglycerin, octaglycerin, nonaglycerin, decaglycerin, undecaglycerin, dodecaglycerin, tridecaglycerin, and tetradecaglycerin. Examples of polyhydric alcohols include C2-C6 polyhydric alcohols having 2 to 3 alcoholic hydroxyl groups; di or tri C2-C3 alkylene glycols; and poly C2-C3 alkylene glycols with 4 or more repeating units and a molecular weight of about 20,000 or less, preferably liquid polyalkylene glycols. Specific examples include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycol, 1,3-propanediol, 1,2-butanediol, thiodiglycol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 3-methyl-1,3-butanediol, 1,2-pentanediol, 1,5-pentanediol, 2-methyl-2,4-pentanediol, 3-methyl-1,5-pentanediol, 1,2-hexanediol, 1,6-hexanediol, glycerin, trimethylolpropane, 1,3-pentanediol, 1,5-pentanediol, etc. Examples of pyrrolidones include 2-pyrrolidone and N-methyl-2-pyrrolidone. Compounds that dissolve in water and act as wetting agents are also included in the category of water-soluble organic solvents for convenience. Examples of such compounds include urea, ethyleneurea, and sugars.

[0055] Considering the storage stability of the colored dispersion according to this embodiment, a solvent with low solubility of (B) water-insoluble dyes is preferred as the water-soluble organic solvent, and in particular, it is preferable to use glycerin in combination with a solvent other than glycerin (preferably a polyhydric alcohol other than glycerin).

[0056] Examples of preservatives include compounds such as organic sulfur, organic nitrogen sulfur, organic halogen, haloallyl sulfone, iodopropagyl, N-haloalkylthio, nitrile, pyridine, 8-oxyquinoline, benzothiazole, isothiazolin, dithiol, pyridine oxide, nitropropane, organotin, phenol, quaternary ammonium salt, triazine, thiazine, anilide, adamantane, dithiocarbamate, brominated indanone, benzyl bromacetate, and inorganic salts. Specific examples of organic halogen compounds include sodium pentachlorophenol. Specific examples of pyridine oxide compounds include sodium 2-pyridinethiol-1-oxide. Specific examples of isothiazolin compounds include 1,2-benzisothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one magnesium chloride, 5-chloro-2-methyl-4-isothiazolin-3-one calcium chloride, and 2-methyl-4-isothiazolin-3-one calcium chloride. Other specific examples of preservatives and fungicides include anhydrous sodium acetate, sodium sorbate, sodium benzoate, and Lonza brand products such as Proxel GXL(S) and Proxel XL-2(S).

[0057] Examples of known surfactants include anionic, cationic, amphoteric, nonionic, silicone-based, and fluorine-based surfactants.

[0058] Examples of anionic surfactants include alkyl sulfonates, alkyl carboxylates, α-olefin sulfonates, polyoxyethylene alkyl ether acetates, N-acyl amino acids and their salts, N-acyl methyl taurates, alkyl sulfates, polyoxyalkyl ether sulfates, alkyl sulfates, polyoxyethylene alkyl ether phosphates, rosinic acid soaps, castor oil sulfates, lauryl alcohol sulfates, alkylphenol type phosphates, alkyl type phosphates, alkylaryl sulfonates, diethyl sulfosaturates, diethylhexyl sulfosaturates, and dioctyl sulfosaturates. Examples of commercially available products include Hi-Tenol LA-10, LA-12, LA-16, Neo-Hi-Tenol ECL-30S, and ECL-45, all manufactured by Daiichi Kogyo Seiyaku Co., Ltd.

[0059] Examples of cationic surfactants include 2-vinylpyridine derivatives and poly-4-vinylpyridine derivatives.

[0060] Examples of amphoteric surfactants include lauryldimethylaminoacetic acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine, polyoctyl polyaminoethylglycine, and imidazoline derivatives.

[0061] Nonionic surfactants include, for example, ether-based surfactants such as polyoxyethylene nonylphenyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene dodecylphenyl ether, polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, and polyoxyethylene alkyl ether; ester-based surfactants such as polyoxyethylene oleate, polyoxyethylene distearate, sorbitan laurate, sorbitan monostearate, sorbitan monooleate, sorbitan sesquioleate, polyoxyethylene monooleate, and polyoxyethylene stearate; acetylene glycol (alcohol)-based surfactants such as 2,4,7,9-tetramethyl-5-decine-4,7-diol, 3,6-dimethyl-4-octin-3,6-diol, and 3,5-dimethyl-1-hexyn-3-ol; Surfinol 104, 105, 82, 465, and Olfin STG manufactured by Air Products Japan Co., Ltd.; and polyglycol ether-based surfactants (for example, Tergitol manufactured by SIGMA-ALDRICH). Examples include 15-S-7, etc.

[0062] Examples of silicone-based surfactants include polyether-modified siloxanes and polyether-modified polydimethylsiloxanes. Examples of commercially available products include BYK-347 (polyether-modified siloxane), BYK-345, and BYK-348 (polyether-modified polydimethylsiloxane), all manufactured by Bic Chemie.

[0063] Examples of fluorinated surfactants include perfluoroalkyl sulfonic acid compounds, perfluoroalkyl carboxylic acid compounds, perfluoroalkyl phosphate ester compounds, perfluoroalkyl ethylene oxide adducts, and polyoxyalkylene ether polymer compounds having perfluoroalkyl ether groups in their side chains. Examples of commercially available products include Zonyl TBS, FSP, FSA, FSN-100, FSN, FSO-100, FSO, FS-300, Capstone FS-30, FS-31 (all manufactured by DuPont); PF-151N, PF-154N (both manufactured by Omnova); and others.

[0064] Any substance can be used as a pH adjuster, as long as it can control the pH of the prepared colored dispersion within the range of 5.0 to 11.0 without adversely affecting the colored dispersion. Specific examples include alkanolamines such as diethanolamine, triethanolamine, and N-methyldiethanolamine; alkali metal hydroxides such as lithium hydroxide, sodium hydroxide, and potassium hydroxide; ammonium hydroxide (ammonia water); alkali metal carbonates such as lithium carbonate, sodium carbonate, sodium bicarbonate, and potassium carbonate; alkali metal salts of organic acids such as potassium acetate; and inorganic bases such as sodium silicate and disodium phosphate. Triethanolamine is preferred.

[0065] Examples of chelating reagents include sodium ethylenediaminetetraacetate, sodium nitrilotriacetate, sodium hydroxyethylethylenediaminetriacetate, sodium diethylenetriaminepentaacetate, and sodium uracildiacetate.

[0066] Examples of rust inhibitors include acidic sulfites, sodium thiosulfate, ammonium thioglycolate, diisopropylammonium nitride, pentaerythritol tetranitrate, and dicyclohexylammonium nitride.

[0067] Examples of water-soluble ultraviolet absorbers include sulfonated benzophenone compounds, benzotriazol compounds, salicylic acid compounds, cinnamic acid compounds, and triazine compounds.

[0068] Examples of water-soluble polymer compounds include polyvinyl alcohol, cellulose derivatives, polyamines, and polyimines.

[0069] Viscosity modifiers include water-soluble organic solvents as well as water-soluble polymer compounds, such as polyvinyl alcohol, cellulose derivatives, polyamines, and polyimines.

[0070] Examples of dye dissolving agents include urea, ε-caprolactam, and ethylene carbonate.

[0071] Various organic and metal complex-based colorfastness inhibitors can be used as antioxidants. Examples of organic colorfastness inhibitors include hydroquinones, alkoxyphenols, dialkoxyphenols, phenols, anilines, amines, indanes, chromans, alkoxyanilines, and heterocyclic compounds. Examples of metal complex-based colorfastness inhibitors include nickel complexes and zinc complexes.

[0072] Examples of resin emulsions include emulsions formed from acrylic resins, epoxy resins, urethane resins, polyether resins, polyamide resins, unsaturated polyester resins, phenolic resins, silicone resins, fluororesins, polyvinyl resins (vinyl chloride, vinyl acetate, polyvinyl alcohol, etc.), alkyd resins, polyester resins, amino materials (melamine resins, urea resins, urea resins, melamine-formaldehyde resins, etc.). The resin emulsion may contain two or more resins. Furthermore, two or more resins may form a core / shell structure. Among resin emulsions, urethane resin emulsions are preferred.

[0073] Urethane resin emulsions are available commercially, and most are emulsions with a solid content concentration of 30-60% by mass. Examples of commercially available urethane resin emulsions include Permarin UA-150, 200, 310, 368, 3945, and U-Coat UX-320 (all manufactured by Sanyo Chemical Industries, Ltd.); Hydran WLS-201, 210, and HW-312B latex (all manufactured by DIC Corporation); and Superflex 150, 170, and 470 (all manufactured by Daiichi Kogyo Seiyaku Co., Ltd.). Among these, examples of polycarbonate-based urethane resins include Permarin UA-310, 3945, and U-Coat UX-320. Examples of polyether-based urethane resins include Permarin UA-150, 200, and U-Coat UX-340.

[0074] The urethane resin in the urethane resin emulsion has an SP value of 8-24 (cal / cm³). 3 ) 1 / 2 Preferably, it is 8-17 (cal / cm³). 3 ) 1 / 2 It is more preferable that it be 8-11 (cal / cm 3 ) 1 / 2 It is even more preferable that this is the case. The SP value of the urethane resin is calculated by the Fedors method. If the urethane resin has acidic groups and these acidic groups are neutralized to prepare the emulsion, the SP value of the urethane resin before neutralization is used.

[0075] If the urethane resin in the urethane resin emulsion has acidic groups such as carboxyl groups, sulfo groups, or hydroxyl groups, these acidic groups may be alkali-chlorinated. For example, the acidic groups can be alkali-chlorinated by adding the urethane resin having acidic groups to water, stirring to prepare an aqueous solution, and then adding an alkaline compound to adjust the pH to 6.0 to 12.0. Examples of alkaline compounds include alkali metal hydroxides such as lithium hydroxide, sodium hydroxide, and potassium hydroxide; and alkaline earth metal hydroxides such as beryllium hydroxide, magnesium hydroxide, calcium hydroxide, and strontium hydroxide. One type of alkaline compound may be used alone, or two or more types may be used in combination.

[0076] [Method for preparing colored dispersions, etc.] A method for preparing the colored dispersion according to this embodiment includes, for example, preparing an aqueous dispersion containing a colorant, a dispersant, and water, and further adding additives such as a water-soluble organic solvent as needed.

[0077] Known methods for preparing aqueous dispersions include stirring and mixing the components constituting the aqueous dispersion using a sand mill (bead mill), roll mill, ball mill, paint shaker, ultrasonic disperser, high-pressure emulsifier, etc. For example, when using a sand mill, first, each component and beads as the dispersion medium are loaded into the sand mill. Glass beads, zirconia beads, etc., with a particle size of 0.01 to 1 mm can be used as beads. The amount of beads used is preferably 2 to 6 parts by mass per 1 part by mass of the material to be dispersed. Next, the sand mill is operated to perform the dispersion treatment. The dispersion treatment conditions are preferably 1000 to 2000 rpm for 1 to 20 hours. After the dispersion treatment, the beads are removed by filtration or the like to obtain an aqueous dispersion.

[0078] The prepared colored dispersion may be subjected to microfiltration using a membrane filter or the like. In particular, when the colored dispersion is used as an inkjet printing ink, it is preferable to perform microfiltration to prevent nozzle clogging and the like. The pore size of the filter used for microfiltration is usually 0.1 to 1 μm, and preferably 0.1 to 0.8 μm.

[0079] The viscosity of the colored dispersion according to this embodiment at 25°C is preferably about 1 to 20 mPa·s when measured with an E-type viscometer, from the viewpoint of high-speed ejection response. Furthermore, the surface tension of the colored dispersion according to this embodiment at 25°C is preferably about 20 to 55 mN / m when measured by the plate method. In practice, the appropriate physical properties are adjusted considering the ejection volume, response speed, ink droplet flight characteristics, etc., of the inkjet printer used.

[0080] The colored dispersion according to this embodiment can be used in various fields and is suitable for water-based writing inks, water-based printing inks, information recording inks, textile printing, etc. The colored dispersion according to this embodiment is particularly preferred for use as an inkjet textile printing ink.

[0081] The colored dispersion according to this embodiment effectively suppresses the deterioration of the filterability of the colored dispersion during storage. In other words, the colored dispersion according to this embodiment can stably maintain the dispersion state of the particles in the colored dispersion.

[0082] Furthermore, the colored dispersion according to this embodiment exhibits good initial filling properties for inkjet printer heads and good continuous printing stability. In addition, it is possible to obtain clear images without blurring of the image on the paper after printing.

[0083] <Colored Dispersion Set> The colored dispersion set according to this embodiment comprises the colored dispersion according to this embodiment and at least one other colored dispersion different from the said colored dispersion. The other colored dispersion is preferably one with a different hue from the colored dispersion according to this embodiment, and examples include colored dispersions with hues such as yellow, magenta, and cyan.

[0084] <Recording media> The recording medium according to this embodiment is one to which the colored dispersion according to this embodiment, or each of the colored dispersions included in the colored dispersion set according to this embodiment, is attached.

[0085] Examples of recording media include fibers and paper (plain paper, inkjet paper, etc.). In particular, the recording media according to this embodiment is preferably hydrophobic fiber.

[0086] Examples of hydrophobic fibers include polyester fibers, nylon fibers, triacetate fibers, diacetate fibers, polyamide fibers, and blended fibers using two or more of these fibers. Blended fibers of these hydrophobic fibers with regenerated fibers such as rayon, and natural fibers such as cotton, silk, and wool are also included in the definition of hydrophobic fibers in this specification. Some of these fibers are known to have an ink-receiving layer (bleed-preventing layer), and such fibers are also included in the definition of hydrophobic fibers. Methods for forming the ink-receiving layer are known technologies, and fibers with an ink-receiving layer are available commercially. The material and structure of the ink-receiving layer are not particularly limited and can be used as appropriate depending on the purpose.

[0087] <Dyeing method for hydrophobic fibers> The method for printing hydrophobic fibers according to this embodiment is a method for printing hydrophobic fibers using a colored dispersion or a colored dispersion set according to this embodiment. Methods for printing hydrophobic fibers are broadly classified into direct printing methods and sublimation transfer methods.

[0088] The direct printing method includes a printing step in which droplets of a colored dispersion are attached to hydrophobic fibers using an inkjet printer to obtain recorded images such as characters and patterns; a fixing step in which the dye in the colored dispersion attached to the hydrophobic fibers in the printing step is fixed to the hydrophobic fibers by heat; and a washing step in which any unfixed dye remaining in the hydrophobic fibers is washed away.

[0089] The fixing process is generally carried out by known steaming or baking. Steaming methods include, for example, treating hydrophobic fibers with a high-temperature steamer at 170-180°C for about 10 minutes, or with a high-pressure steamer at 120-130°C for about 20 minutes, thereby fixing the dye to the hydrophobic fibers (also called wet heat fixing). Baking (thermosol) methods include, for example, treating hydrophobic fibers at 190-210°C for about 6-120 seconds, thereby fixing the dye to the hydrophobic fibers (also called dry heat fixing).

[0090] The washing process involves washing the obtained fibers with hot water and, if necessary, with water. The hot water and water used for washing may contain surfactants. It is also preferable to dry the hydrophobic fibers after washing at a temperature of 50 to 120°C for 5 to 30 minutes.

[0091] On the other hand, the sublimation transfer method includes a printing step in which droplets of a colored dispersion are attached to an intermediate recording medium using an inkjet printer to obtain a recorded image such as characters or patterns, and a transfer step in which hydrophobic fibers are brought into contact with the surface on which the colored dispersion is attached to the intermediate recording medium and heat-treated to transfer the recorded image to the hydrophobic fibers.

[0092] As an intermediate recording medium, it is preferable that the dye in the attached color dispersion does not aggregate on its surface and does not interfere with the sublimation of the dye when transferring the recorded image to the hydrophobic fibers. An example of such an intermediate recording medium is paper in which an ink-receiving layer is formed on the surface of inorganic fine particles such as silica, and inkjet-specific paper can be used.

[0093] The heat treatment used in the transfer process typically involves dry heat treatment at around 190-200°C.

[0094] The method for printing hydrophobic fibers according to this embodiment may further include a pretreatment step for hydrophobic fibers in order to prevent bleeding, etc. This pretreatment step may include applying an aqueous solution (pretreatment solution) containing a sizing agent, an alkaline substance, a reduction inhibitor, and a hydrotropic agent to the hydrophobic fibers before the color dispersion is applied.

[0095] Examples of adhesives include natural gums such as guar and locust bean; starches; sodium alginate and seaweed such as funori; plant peels such as pectin; cellulose derivatives such as methylcellulose, ethylcellulose, hydroxyethylcellulose, and carboxymethylcellulose; modified starches such as carboxymethyl starch; and synthetic adhesives such as polyvinyl alcohol and polyacrylic acid esters, with sodium alginate being preferred.

[0096] Examples of alkaline substances include alkali metal salts of inorganic or organic acids; salts of alkaline earth metals; compounds that release alkali when heated; and alkali metal hydroxides and alkali metal salts are preferred. Specific examples include alkali metal hydroxides such as sodium hydroxide and calcium hydroxide; alkali metal salts of inorganic compounds such as sodium carbonate, sodium bicarbonate, potassium carbonate, sodium dihydrogen phosphate, disodium hydrogen phosphate, and sodium phosphate; alkali metal salts of organic compounds such as sodium formate and sodium trichloroacetate; and sodium bicarbonate is preferred.

[0097] Sodium metanitrobenzenesulfonate is preferred as the reduction inhibitor. Examples of hydrotropic agents include urea, dimethylurea, and other urea derivatives, with urea being preferred.

[0098] The adhesive, alkaline substance, reduction inhibitor, and hydrotropic agent may be used individually or in combination of two or more types.

[0099] The mixing ratio of each component in the pretreatment solution is, for example, 0.5-5% by mass of the thickener, 0.5-5% by mass of sodium bicarbonate, 0-5% by mass of sodium metanitrobenzenesulfonate, 1-20% by mass of urea, and the remainder being water.

[0100] One method for applying the pretreatment solution to the hydrophobic fibers is the padding method. The padding ratio is preferably around 40-90%, and more preferably around 60-80%. [Examples]

[0101] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified in the examples, "parts" means parts by mass and "%" means mass percent. In each example, the aqueous dispersion and violet ink are both included in the above-mentioned colored dispersion.

[0102] <Measurement of the content of the compound represented by formula (1) and the compound represented by formula (2) in the coloring agent> The content of the compound represented by formula (1) above (peak area (A) in HPLC analysis) and the content of the compound represented by formula (2) above (peak area (B) in HPLC analysis) in the colorant were measured by the following procedure. First, 20 g of acetonitrile was added to 10 mg of the colorant and irradiated with ultrasound for 3 minutes. This mixture was filtered through a syringe filter with a pore size of 0.45 μm (manufactured by ADVANTECH), and then analyzed using an HPLC instrument. The HPLC measurement conditions were as follows. The peak was detected with a minimum peak detection area of ​​1000. -HPLC measurement conditions- Device: SPD-M20A (manufactured by Shimadzu Corporation) Column: Inertsil ODS-2 (4.6 mm x 250 mm) (particle size 5 μm) Column temperature: 40℃ Eluent: Acetonitrile / 5mM Ammonium acetate = 70 / 30 Flow rate: 0.8mL / min Injection volume: 4μL Detection wavelength: 254nm

[0103] <Preparation of coloring agents> A compound containing the compound represented by formula (1) and the compound represented by formula (2) in a content ratio of 2.62:93.79 was defined as colorant 1. Furthermore, a compound containing the compound represented by formula (1) and the compound represented by formula (2) in a content ratio of 8.06:87.59 was defined as colorant 2. Furthermore, colorants 3 to 8 were prepared according to the methods described in Preparation Examples 1 to 6 below.

[0104] [Preparation Example 1] A mixture (10 parts) containing the compound represented by formula (1) and the compound represented by formula (2) in a ratio of 8.06:87.59 was mixed with methanol (100 parts), stirred for 2 hours, and then the compound represented by formula (2) was filtered off using a Buchner funnel. Methanol (50 parts) was poured into the filtrate in the Buchner funnel and filtered again. Water (100 parts) was then poured into the filtrate in the Buchner funnel and filtered again. The resulting filtrate was dried in a 70°C bath for 3 hours and then ground in a mortar. The resulting pulverized material was designated as coloring agent 3.

[0105] [Preparation Example 2] A mixture (10 parts) containing the compound represented by formula (1) and the compound represented by formula (2) in a ratio of 8.06:87.59 was mixed with methanol (100 parts), stirred for 2 hours, and then the compound represented by formula (2) was filtered off using a Buchner funnel. Methanol (100 parts) was poured into the filtrate on the Buchner funnel and filtered again. Water (100 parts) was then poured into the filtrate on the Buchner funnel and filtered again. The resulting filtrate was dried in a 70°C bath for 3 hours and then ground in a mortar. The resulting pulverized material was designated as coloring agent 4.

[0106] [Preparation Example 3] A mixture (10 parts) containing the compound represented by formula (1) and the compound represented by formula (2) in a ratio of 8.06:87.59 was mixed with methanol (50 parts), stirred for 2 hours, and then the compound represented by formula (2) was filtered off using a Buchner funnel. Methanol (50 parts) was poured into the filtrate in the Buchner funnel and filtered again. Water (100 parts) was then poured into the filtrate in the Buchner funnel and filtered again. The resulting filtrate was dried in a 70°C bath for 3 hours and then ground in a mortar. The resulting pulverized material was designated as coloring agent 5.

[0107] [Preparation Example 4] A mixture (10 parts) containing the compound represented by formula (1) and the compound represented by formula (2) in a ratio of 8.06:87.59 was mixed with methanol (50 parts), stirred for 2 hours, and then the compound represented by formula (2) was filtered off using a Buchner funnel. Water (100 parts) was poured into the filtrate on the Buchner funnel and filtered again. The resulting filtrate was dried in a 70°C bath for 3 hours and then ground in a mortar. The resulting pulverized material was designated as coloring agent 6.

[0108] [Preparation Example 5] Colorant 2 and colorant 3 were blended so that the content ratio ((A) / (B)) of the compound represented by formula (1) above to the compound represented by formula (2) above was 0.027. The resulting mixture is called colorant 7.

[0109] [Preparation Example 6] Colorant 2 and colorant 3 were blended such that the content ratio ((A) / (B)) of the compound represented by formula (1) above to the compound represented by formula (2) above was 0.028. The resulting mixture was designated as colorant 8.

[0110] The content of the compound represented by formula (1) above (peak area (A) in HPLC analysis), the content of the compound represented by formula (2) above (peak area (B) in HPLC analysis), and the value expressed as (A) / (B) in colorants 1 to 8 are shown in Tables 1 and 2 below.

[0111] [Table 1]

[0112] [Table 2]

[0113] <Examples 1-5: Preparation of aqueous dispersions 1-5> Each component listed in Table 3 below was mixed with 0.2 mm diameter glass beads and dispersed in a sand mill under water cooling for approximately 15 hours. The resulting liquid was filtered through glass fiber filter paper GC-50 (manufactured by ADVANTEC, pore size: 0.5 μm) to obtain aqueous dispersions 1-5, each containing 15% colorant.

[0114] <Comparative Examples 1-3: Preparation of Aqueous Dispersions 6-8> Each component listed in Table 4 below was mixed with 0.2 mm diameter glass beads and dispersed in a sand mill under water cooling for approximately 15 hours. The resulting liquid was filtered through glass fiber filter paper GC-50 (manufactured by ADVANTEC, filter pore size: 0.5 μm) to obtain aqueous dispersions 6-8, each containing 15% colorant.

[0115] [Table 3]

[0116] [Table 4]

[0117] In Tables 3 and 4, the numerical values ​​for each component indicate the number of copies to which it was added. Furthermore, the abbreviations in Tables 3 and 4 represent the following: Labelin W40: Labelin W40 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) BPS-30: NIKKOL BPS-30 (manufactured by Nikko Chemicals Co., Ltd.) Surfinol 104PG50: Surfinol 104 (manufactured by Air Products Japan Co., Ltd.) diluted to a 50% concentration with propylene glycol. Proxel GXL (S): Proxel GXL (S) (manufactured by Lonza)

[0118] <Examples 6-10: Preparation of Violet Inks 1-5> The aqueous dispersions 1 to 5 obtained in Examples 1 to 5 were mixed with the components listed in Table 5 below, stirred for 30 minutes, and then filtered through a 5.0 μm pore size filter (Sartorius) to prepare violet inks 1 to 5.

[0119] <Comparative Examples 4-6: Preparation of Violet Inks 6-8> The aqueous dispersions 6-8 obtained in Comparative Examples 1-3 were mixed with the components listed in Table 6 below, stirred for 30 minutes, and then filtered through a 5.0 μm pore size filter (Sartorius) to prepare violet inks 6-8.

[0120] [Table 5]

[0121] [Table 6]

[0122] In Tables 5 and 6, the values ​​for each component indicate the number of copies to which it was added. Furthermore, the abbreviations in Tables 5 and 6 represent the following: BYK-348: Polyether-modified polydimethylsiloxane (manufactured by BIC Chemie Japan Co., Ltd.) TEA-80: Triethanolamine (manufactured by Oxalis Chemicals Co., Ltd.) Proxel GXL (S): Proxel GXL (S) (manufactured by Lonza)

[0123] <Rating> The following evaluation tests were conducted using each ink prepared as described above. The results are shown in Table 7 below.

[0124] [Viscosity change test] The viscosity of each ink, both initially and after being stored at 70°C for 3 days, was measured at 25°C and 50 rpm using an E-type viscometer (TV-200, manufactured by Toki Sangyo Co., Ltd.) calibrated with viscometer calibration standard solution JS10 (manufactured by Nippon Grease Co., Ltd.). The viscosity change rate was calculated from the initial and post-storage viscosities, and storage stability was evaluated according to the following evaluation criteria. A or B indicates a good evaluation, and C indicates a poor evaluation. -Evaluation Criteria- A: The absolute value of the rate of change is less than 5% B: The absolute value of the rate of change is 5% or more but less than 8% C: The absolute value of the rate of change is 8% or more.

[0125] [Evaluation of filtration performance] 15 mL of each ink was placed in an iBoy 50 mL bottle (manufactured by AS ONE Corporation) and sealed tightly. After storing 15 mL of each ink at 70°C for 3 days, it was filtered through a 0.8 μm pore size filter (ADVANTEC, DISMIC) and the filterability was evaluated according to the following evaluation criteria. A, B, and C indicate good evaluation, while D, E, and F indicate poor evaluation. In the evaluation criteria below, "completely passable" means that the specified amount of ink can be filtered completely. -Evaluation Criteria- A: It can handle the entire 15mL of ink and has almost no filtration resistance. B: It can handle 15mL of ink completely, but there is a slight resistance to filtering. C: It can handle 15mL of ink completely, but there is some resistance to filtration. D: 12.5mL of ink can pass through completely, but filter clogging occurs, and 15mL of ink cannot pass through completely. E: 10mL of ink can pass through completely, but filter clogging occurs, and 12.5mL of ink cannot pass through completely. F: A filter blockage occurs, preventing the entire 10mL of ink from passing through.

[0126] [Table 7]

[0127] As shown in Table 7, each ink from Examples 6 to 10 exhibited superior storage stability and post-storage filtration compared to each ink from Comparative Examples 4 to 6.

[0128] [Preparation of dyed fabric] Using the inks from Examples 6-10, solid patterns were printed onto transfer paper, an intermediate recording medium, using an inkjet printer PX-105 (manufactured by Seiko Epson Corporation). The ink-covered portion of the printed transfer paper was cut to 35cm x 40cm. After cutting, the ink-covered surface of the transfer paper was placed on top of a polyester cloth (pongee) of the same size, and then heat-treated at 200°C for 60 seconds using a transfer press (TP-600A2, manufactured by Taiyo Seiki Co., Ltd.) to perform sublimation transfer dyeing from the transfer paper to the polyester cloth. As a result, the desired colors were obtained in all cases.

Claims

1. A coloring agent containing the compound represented by the following formula (1) and the compound represented by the following formula (2), and water, A colored dispersion in which, when the colorant is analyzed by high-performance liquid chromatography (HPLC), the peak area (A) of the compound represented by the following formula (1) and the peak area (B) of the compound represented by the following formula (2) satisfy the relationship 0.001 ≤ ((A) / (B)) ≤ 0.

014. 【Chemistry 1】

2. Furthermore, the colored dispersion according to claim 1 contains an anionic dispersant.

3. The colored dispersion according to claim 2, wherein the anionic dispersant is a sodium naphthalene sulfonate formalin condensate.

4. The colored dispersion according to claim 3, wherein the sodium naphthalene sulfonate formalin condensate is a formalin condensate of creosote oil sulfonic acid.

5. Furthermore, the colored dispersion according to any one of claims 1 to 4, further containing a phytosterol compound.

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