Composition for preventing dye transfer and method for preventing dye transfer

Abstract

To provide a composition for preventing dye transfer and a method for preventing dye transfer using the composition, exhibiting a high effect in preventing dye transfer, with high adsorption to and dispersibility for dyes, and / or low adsorption to fabrics, and without reattachment of dyes to fabrics.SOLUTION: A composition for preventing dye transfer comprises: component (a) a water-soluble divalent or higher metal salt; and component (b) a nitrogen-containing water-soluble organic compound. When mixed with water and used as a dye transfer-preventing treatment agent, the pH ranges from 1 to 7 inclusive.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a composition for preventing migration staining and a method for preventing migration staining.

Background Art

[0002] When laundering clothes and the like, the dyes contained in the clothes and the like may bleed out and adhere to other parts. As a technique for preventing this, various additives such as polymers have been developed. Such additives are called migration stain preventers. The use of polymer compounds and metal salts as migration stain preventers is disclosed. For example, Patent Document 1 discloses a detergent additive containing a structural unit derived from a monomer (A) having an ethylenically unsaturated group and a lactam ring in the molecule, and a structural unit derived from a monomer (B) having an ethylenically unsaturated group and an acyclic amide bond in the molecule. Further, Patent Document 2 discloses a migration stain preventer characterized by containing an N-vinyl lactam-containing copolymer (α) having a structural unit (a) derived from an N-vinyl lactam-based monomer (A) and a structural unit (b) derived from an unsaturated alcohol (B). Further, Patent Document 3 discloses the use of an amphiphilic graft polymer mainly composed of a polyalkylene oxide and a vinyl ester as a migration stain preventer. Further, Patent Document 4 discloses the use of a poly-C 2 ~C 4 -alkyleneimine as a migration stain preventer. Further, Patent Document 5 discloses the use of a thermosensitive polymer having a lower critical solution temperature (LCST) as a migration stain preventer.

[0003] Furthermore, Patent Document 6 discloses a decolorization preventer for a colored fiber material composed of aluminum halide.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] Conventional anti-migration agents have insufficient anti-migration effects because of their low adsorption and dispersibility to dyes and / or due to the re-attachment of dyes to the fabric based on their high adsorption to the fabric. For example, in the evaluation of anti-migration properties in a solution containing dyes, those with excellent adsorption and dispersibility to dyes show high values. However, under actual use conditions, since dyes are detached from clothing, if the adsorption to the fabric is high, adsorption to the fabric occurs prior to adsorption to the detached dyes. As a result, the expected anti-migration effect cannot be exerted. [Means for Solving the Problems]

[0006] In view of the above problems, as a result of intensive studies, it has been found that a composition containing a water-soluble metal salt of divalent or higher and a nitrogen-containing water-soluble organic substance exhibits a remarkable effect on anti-migration.

[0007] That is, the present invention relates to Component (a): a water-soluble metal salt of divalent or higher, Component (b): a nitrogen-containing water-soluble organic substance, and relates to an anti-migration composition which contains the above components, and when mixed with water and used as an anti-migration treatment agent, has a pH of 1 or more and 7 or less.

[0008] The present invention also relates to a method for preventing migration of dyes from colored fibers to white fibers when washing the white fibers in the presence of the colored fibers, the method comprising: Component (a): a water-soluble metal salt having a valence of 2 or more, and component (b): a nitrogen-containing water-soluble organic substance, with a total content of 0.001% by mass or more and 0.5% by mass or less, including water, and having a pH of 1 or more and 7 or less, and a method of bringing the anti-migration treatment agent into contact with the colored fibers and the white fibers.

Advantages of the Invention

[0009] The anti-migration composition of the present invention can fully exhibit its adsorption and dispersion performance to dyes, and shows an anti-migration ability superior to that of conventional anti-migration agents.

Embodiments for Carrying Out the Invention

[0010] Hereinafter, the present invention will be described in detail. First, the water-soluble metal salt of component (a) of the anti-migration composition of the present invention will be described.

[0011] In the anti-migration composition of the present invention, a water-soluble metal salt having a valence of 2 or more is essential as component (a). Component (a) has an effect of further enhancing the anti-migration effect in the anti-migration composition of the present invention when used in combination with component (b) described later. From the viewpoint of further enhancing the anti-migration effect, component (a) is preferably a water-soluble metal salt having a valence of 2 or more and 5 or less. Examples of the metal of the metal salt include Group 13 elements such as aluminum (III), Group 12 elements such as zinc (II), alkaline earth metal elements such as magnesium (II) and calcium (II), transition metal elements such as copper (II), iron (II), and iron (III), Group 4 elements such as titanium (II) and titanium (IV), and Group 5 elements such as vanadium (V). From the viewpoint of further enhancing the anti-migration ability, Group 13 elements, Group 12 elements, alkaline earth metal elements, and transition metal elements are preferred, among which aluminum (III), zinc (II), magnesium (II), calcium (II), and copper (II) are more preferred, aluminum (III), zinc (II), and calcium (II) are even more preferred, and aluminum (III) is even more preferred.

[0012] Examples of the counter anion of the water-soluble metal salt having a valence of 2 or more of component (a) include inorganic counter anions such as sulfate ion, hydrogen sulfate ion, fluoride ion, chloride ion, bromide ion, and nitrate ion. Also, organic counter anions such as acetate ion, acetylacetonate ion, and oxalate ion can be used.

[0013] In the present invention, water-soluble means dissolving 20 g or more in 100 mL of ion-exchanged water at 20°C. In order to have such water solubility, it is preferable to use an inorganic counter anion as the counter anion, and among them, sulfate ion, chloride ion, and nitrate ion are more preferable. That is, as the metal salt, sulfate salt, chloride salt, and nitrate salt are preferable.

[0014] The content of component (a) is preferably 1% by mass or more, more preferably 3% by mass or more, still more preferably 5% by mass or more, from the viewpoint of further enhancing the migration prevention ability, and is preferably 40% by mass or less, more preferably 35% by mass or less, still more preferably 30% by mass or less. The content of component (a) can be read as the blending amount contained in the migration prevention composition of the present invention by blending component (a).

[0015] Next, the nitrogen-containing water-soluble organic substance of component (b) of the migration prevention composition of the present invention will be described. In the migration prevention composition of the present invention, the nitrogen-containing water-soluble organic substance is essential as component (b).

[0016] The solubility of component (b) in water is preferably 0.1 g or more with respect to 100 mL of ion-exchanged water at 20°C. When component (b) is a polymer or copolymer of the nitrogen-containing organic substances shown below, those that are dispersed in water to form a colloidal solution are also included in component (b). The solubility of component (b) in water at that time may be defined as the amount that forms a stable colloidal solution at 20°C.

[0017] Examples of nitrogen-containing compounds having water solubility include pyridine, pyridone, quinoline, aniline, pyrrole, pyrrolidone, imidazole, indole, isoindole, pyrrolidine, oxazole, benzoxazole, oxazolidone, oxazolidine, etc.; compounds such as vinylpyridine, N-vinylpyrrolidone, N-vinylimidazole in which a vinyl group is substituted on the nitrogen-containing compound; polymers such as vinylpyridine, oxazolidone, N-vinylpyrrolidone, N-vinylimidazole; copolymers obtained from two or more selected from vinylpyridine, oxazolidone, N-vinylpyrrolidone, N-vinylimidazole, etc.; can be exemplified. Further, a mixture of two or more of these compounds, polymers, and copolymers may be used. Among them, from the viewpoint of further improving the ability to prevent migration when used in combination with the component (a), vinylpyridine, oxazolidone, N-vinylpyrrolidone, N-vinylimidazole; polymers of vinylpyridine, oxazolidone, N-vinylpyrrolidone, N-vinylimidazole; copolymers obtained from two or more selected from vinylpyridine, oxazolidone, N-vinylpyrrolidone, N-vinylimidazole; and one or more selected from mixtures of two or more of these are preferred. In the present invention, derivatives in which part or all of the hydrogen atoms bonded to the carbon atoms present in the imidazole skeleton of the above-mentioned N-vinylimidazole are substituted with an alkyl group having 1 to 6 carbon atoms are also included in the N-vinylimidazole of the present invention. For example, 1-vinylimidazole, 1-vinyl-2-methylvinylimidazole, etc. can be mentioned. Similarly, derivatives in which part or all of the nitrogen atoms present in the imidazole skeleton of N-vinylimidazole are quaternized with an alkyl group having 1 to 3 carbon atoms are also included in the N-vinylimidazole of the present invention. For example, 3-methyl-1-vinylimidazolium chloride, 3-methyl-1-vinylimidazolium methyl sulfate can be mentioned. Examples of the alkyl group include one or more alkyl groups selected from methyl group, ethyl group, propyl group, butyl group, pentyl group, cyclopentyl group, hexyl group and cyclohexyl group. The polymer of N-vinylimidazole also includes a copolymer in which N-vinylimidazole and the above-mentioned N-vinylimidazole derivative are mixed. In the present invention, derivatives in which part or all of the hydrogen atoms bonded to the carbon atoms of the pyrrolidone skeleton of the above-mentioned N-vinylpyrrolidone are substituted with an alkyl group having 1 to 3 carbon atoms are also included in the N-vinylpyrrolidone of the present invention. For example, 3-methyl-N-vinylpyrrolidone, 4-methyl-N-vinylpyrrolidone, 5-methyl-N-vinylpyrrolidone can be mentioned. In addition, 1,3-divinylimidazolidin-2-one can be used as a cross-linking agent for the above polymer or copolymer, and it can be used at a level exceeding 0% by mass and less than 3% by mass based on the total mass of the monomers.

[0018] The content of component (b) is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.1% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, from the viewpoint of further enhancing the migration prevention ability.

[0019] The mass ratio of component (a) to component (b) is preferably 10 / 90 or more, more preferably 30 / 70 or more, still more preferably 50 / 50 or more, even more preferably 70 / 30 or more, and preferably 99 / 1 or less, more preferably 98 / 2 or less, still more preferably 97 / 3 or less, even more preferably 96 / 4 or less, in terms of the component (a) / component (b) from the viewpoint of further enhancing the migration prevention ability.

[0020] The anti-migration composition of the present invention can contain a solvent. From the viewpoint of convenience, it is preferable to use water as the solvent. That is, component (a), component (b), and any components including a pH adjuster and a surfactant described later can be blended, and this can be mixed with water and used as an anti-migration composition.

[0021] The anti-migration composition of the present invention can be mixed with water and used as an anti-migration treatment agent. Also, from the viewpoint of convenience, it is preferable to mix component (a) and component (b) of the present invention with water and use them as an anti-migration treatment agent. When used as an anti-migration treatment agent, the total content ratio of component (a) and component (b) in the anti-migration treatment agent is preferably 0.1 to 50% by mass from the viewpoint of convenience. The pH when used as an anti-migration treatment agent is preferably 1 or more, more preferably 2 or more, still more preferably 3 or more, and preferably 7 or less, more preferably 6.5 or less, still more preferably 6 or less, even more preferably 5.5 or less, and even more preferably 5 or less from the viewpoint of further enhancing the anti-migration ability when used as an anti-migration treatment agent. In the present invention, the "pH when used as an anti-migration treatment agent" means, for example, in the standard usage of the anti-migration composition, when the mixing ratio of the composition and water is presented together with the anti-migration composition, the pH when mixed and used at the presented mixing ratio of the composition and water. Also, in the standard usage, when there is no presentation of the mixing ratio of the composition and water, the pH is that of the anti-migration treatment agent obtained by mixing with water so that the content ratio of the anti-migration composition in the anti-migration treatment agent composition is 0.1% by mass. In the present invention, the measurement temperature of pH is 30 °C regardless of the temperature during use.

[0022] In order to adjust the pH of the anti-migration treatment agent of the present invention to a desired pH, any acidic or alkaline pH adjuster may be used. Examples of the acidic pH adjuster include inorganic acids such as hydrochloric acid, nitric acid, and sulfuric acid, and organic acids such as acetic acid, citric acid, lactic acid, malic acid, and maleic acid. Examples of the alkaline pH adjuster include sodium hydroxide, sodium hydrogen carbonate, potassium hydroxide, ammonium hydroxide, monoethanolamine, diethanolamine, triethanolamine, and tris(hydroxymethyl)aminomethane. As the solvent for these pH adjusters, water is preferably used from the viewpoint of enhancing convenience.

[0023] The anti-migration composition of the present invention can be used by adding one or more surfactants according to the object to be washed and the type of dirt, and thereby not only the anti-migration effect but also the washing effect may be improved. Examples of surfactants that can be used include anionic surfactants such as alkyl sulfate salts, polyoxyalkylene alkyl ether sulfate salts, alkylbenzene sulfonates, polyoxyalkylene alkenyl ether ammonium sulfates, fatty acid salts, potassium polyoxyalkylene alkyl ether phosphates, dipotassium alkenyl succinates, naphthalene sulfonic acid formalin condensates; nonionic surfactants such as polyoxyalkylene alkyl ethers, polyoxyalkylene derivatives, polyoxyalkylene alkenyl ethers, polyoxyalkylene fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, glycerin fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkylamines, alkyl alkanolamides; cationic surfactants such as alkylamine salts, quaternary ammonium salts; amphoteric surfactants such as alkyl betaines, alkylamine oxides; etc. The alkyl or alkenyl represents a linear or branched alkyl group having 10 or more and 24 or less carbon atoms or a linear or branched alkenyl group having 10 or more and 24 or less carbon atoms. Preferably, it represents a linear or branched alkyl group having 12 or more and 18 or less carbon atoms or a linear or branched alkenyl group having 12 or more and 18 or less carbon atoms. Polyoxyalkylene means a group having 1 or more and 50 or less oxyalkylene groups having 2 or more and 3 or less carbon atoms as repeating units. Examples of the oxyalkylene group having 2 or more and 3 or less carbon atoms include one or more groups selected from an oxyethylene group and an oxypropylene group. When the number of repeating units of the oxyalkylene group is 2 or more, it may be only an oxyethylene group, only an oxypropylene group, or a mixture of an oxyethylene group and an oxypropylene group. When mixed, the oxyethylene group and the oxypropylene group may be random, block, or a mixture of random and block. Examples of the fatty acyl group of the fatty acid ester include saturated or unsaturated fatty acyl groups having 10 or more and 18 or less carbon atoms. One or more selected from these can be used.For example, specific embodiments of polyoxyalkylene alkyl ethers, polyoxyalkylene alkenyl ethers, or polyoxyalkylene fatty acid esters include nonionic surfactants represented by the following general formula (1). R 1 -(C=O)n-O-(R 2 O)m-R 3 (1) 〔In formula (1), the R 1 group is a linear or branched alkyl or alkenyl group having 9 to 17 carbon atoms, the R 2 group is an alkylene group having 2 or 3 carbon atoms, the R 3 group is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, n is 0 or 1, and m is a number from 1 to 50.〕 From the viewpoint of further enhancing the ability to prevent migration when used together with component (a) and component (b) of the present invention, the R 1 group is preferably a linear alkyl group having 11 to 16 carbon atoms, more preferably a linear alkyl group having 12 to 14 carbon atoms. From the same viewpoint, the R 2 O group is preferably an oxyethylene group or an oxypropylene group, more preferably an oxyethylene group. From the same viewpoint, the R 3 group is preferably a hydrogen atom or a methyl group, more preferably a hydrogen atom. From the same viewpoint, n is preferably 0. From the same viewpoint, m is preferably 2 or more, more preferably 4 or more, still more preferably 6 or more, and is preferably 40 or less, more preferably 35 or less, still more preferably 20 or less. When m is 2 or more, from the same viewpoint, the R 2 O group is preferably an oxyalkylene group containing an oxyethylene group, more preferably an oxyethylene group.

[0024] From the viewpoint of further enhancing the anti-migration ability by using it together with components (a) and (b) of the present invention, the content of the surfactant is preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 25% by mass or more, based on the total content of components (a) and (b), and is preferably 500% by mass or less, more preferably 400% by mass or less, still more preferably 300% by mass or less. Further, the anti-migration ability can be sufficiently exhibited even without containing a surfactant.

[0025] In addition to components (a) and (b), components such as enzymes, dyes, fluorescent dyes, fragrances, preservatives, solvents, and antifoaming agents may be optionally added to the anti-migration composition of the present invention.

[0026] The anti-migration treatment agent obtained by mixing the anti-migration composition agent of the present invention with water, or When the anti-migration treatment agent obtained by mixing component (a), component (b), and water is brought into contact with both fibrous materials when washing a white fibrous material in the presence of a colored fibrous material, it has high adsorptivity and dispersibility to dyes and the like, and / or low adsorptivity to the fabric, and the dyes and the like do not reattach to the fabric, so that migration from the colored fibrous material to the white fibrous material can be prevented.

[0027] All aspects of the anti-migration treatment agent used in the method for preventing migration from a colored fibrous material to a white fibrous material when washing the white fibrous material in the presence of the colored fibrous material of the present invention can directly apply the aspects described for the anti-migration composition. That is, the examples, usage amounts, solvents, other components, surfactants, etc. of components (a) and (b) can directly apply the descriptions in the above description of the anti-migration composition.

[0028] The method for preventing migration of the present invention can preferably be carried out at 0°C or higher, more preferably 10°C or higher, still more preferably 20°C or higher, even more preferably 25°C or higher, even more preferably 30°C or higher, even more preferably 40°C or higher, even more preferably 50°C or higher, and preferably 90°C or lower, more preferably 80°C or lower, still more preferably 70°C or lower, even more preferably 60°C or lower, even more preferably 55°C or lower. Also, the total content of component (a) and component (b) in the migration prevention treatment agent of the present invention depends on the washing method (hand washing, washing machine, etc.), but from the viewpoint of enhancing the migration prevention ability, it is preferably 0.001% by mass or more, more preferably 0.003% by mass or more, still more preferably 0.005% by mass or more, and preferably 0.5% by mass or less, more preferably 0.4% by mass or less, still more preferably 0.3% by mass or less. The pH at the use temperature during use is preferably 1 or higher, more preferably 2 or higher, still more preferably 3 or higher, and preferably 7 or lower, more preferably 6 or lower, from the viewpoint of further enhancing the migration prevention ability.

[0029] When the pH of the migration prevention treatment agent obtained by mixing the migration prevention composition of the present invention with water falls within the above range, it can be used as it is as the migration prevention treatment agent. Also, in order to adjust to a desired pH, any acidic or alkaline pH adjuster may be used. Examples of the acidic pH adjuster can include inorganic acids such as hydrochloric acid, nitric acid, and sulfuric acid, and organic acids such as acetic acid, citric acid, lactic acid, malic acid, and maleic acid. Examples of the alkaline pH adjuster can include sodium hydroxide, sodium hydrogen carbonate, potassium hydroxide, ammonium hydroxide, monoethanolamine, diethanolamine, triethanolamine, and tris(hydroxymethyl)aminomethane. As the solvent for these pH adjusters, water is preferably used in terms of high convenience. Also, the pH adjustment may be carried out after the preparation of the migration prevention composition or after mixing with water to obtain the migration prevention treatment agent.

[0030] Examples of materials for the colored fiber material and the white fiber material include cellulose fibers such as cotton and hemp, protein fibers such as wool and silk, and synthetic fibers such as nylon, polyester, and acrylic.

[0031] Also, the colored fiber material may exist independently of the white fiber material, or a colored portion and a white portion may exist in one fiber material. In that case as well, the above materials can be exemplified.

[0032] Examples of coloring of the colored fiber material include coloring due to dyes, pigments, etc., and also coloring caused by stains such as starch stains, protein stains, and scale stains.

[0033] The anti-migration treatment agent of the present invention can be used by adding one or more surfactants according to the object to be washed and the type of stain, and thereby not only the anti-migration effect is achieved, but also the washing effect may be improved. As the surfactant that can be used, those exemplified in the anti-migration composition can be used. The content of the surfactant is preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 25% by mass or more, and preferably 500% by mass or less, more preferably 400% by mass or less, still more preferably 300% by mass or less, based on the total content of component (a) and component (b). Also, the anti-migration ability can be sufficiently exhibited even without containing a surfactant.

[0034] In addition to components (a) and (b), components such as enzymes, pigments, fluorescent dyes, fragrances, preservatives, solvents, and defoamers may be optionally added to the anti-migration treatment agent of the present invention.

[0035] Note that if the anti-migration composition diluted with the aforementioned water exhibits a desired pH, the anti-migration treatment agent of the present invention may be used as it is as the anti-migration treatment agent.

[0036] <Examples and Comparative Examples> Hereinafter, the present invention will be described in detail by showing examples and comparative examples, but the present invention is not limited by the following description.

[0037] The components used are as follows. <Component (a)> AlCl 3 ·6H 2 O: Manufactured by Fujifilm Wako Pure Chemical Corporation ZnSO 4 ·7H 2 O: Manufactured by Fujifilm Wako Pure Chemical Corporation CuSO 4 ·5H 2 O: Manufactured by Fujifilm Wako Pure Chemical Corporation Also, as a comparison, the following compound, which is a monovalent metal salt, was used. <Component (a')> NaCl: Manufactured by Fujifilm Wako Pure Chemical Corporation

[0038] <Component (b)> PVP (polyvinylpyrrolidone) / PVI (polyvinylimidazole) copolymer: Manufactured by BASF Oxazolidone: Manufactured by Fujifilm Wako Pure Chemical Corporation Vinylpyridine: Manufactured by Fujifilm Wako Pure Chemical Corporation Also, as a comparison, the following compound that does not contain nitrogen was used. <Component (b')> Polyethylene glycol 6,000 (PEG): Manufactured by Fujifilm Wako Pure Chemical Corporation

[0039] <Surfactant> Polyoxyethylene (average number of added moles of oxyethylene group is 10) lauryl ether, KE110: Manufactured by Kao Corporation

[0040] Using the above components, a migration prevention composition shown in Table 1 was prepared. The contents of the surfactant and various components (a) and (b) are all in mass%. Water was added to these components to make a total of 100 mass%. Further, the composition was mixed with water to obtain a 0.1 mass% diluted aqueous solution, which was used as a migration prevention treatment agent. The pH of the 0.1 mass% diluted aqueous solution indicates the pH of this migration prevention treatment agent. For the pH values in Examples 1 to 4, it is the pH at 30 °C of the migration prevention treatment agent obtained by mixing the composition with water to form a 0.1 mass% diluted aqueous solution. In Examples 5 to 13 and Comparative Examples 1 to 5, after mixing the migration prevention composition with water to obtain a migration prevention treatment agent of 0.1 mass% diluted aqueous solution, 48 mass% aqueous sodium hydroxide solution or 1M hydrochloric acid aqueous solution was further added to adjust the pH to a predetermined value.

[0041]

Table 1

[0042] <Evaluation method of migration prevention effect> 600 mL of ion-exchanged water in which 0.6 g of the above migration prevention composition was dissolved was added to a turgotometer, 3.6 g of AISE test cloth NO. 13 (purchased from CFT), and 16.4 g of cotton knitted fabric (purchased from Taniguchi Shoten, 6 cm × 6 cm) were added, and washing was carried out under the conditions of a washing time of 10 minutes, a rotation speed of 100 rpm, and a water temperature of 30 °C. After washing, dehydration was carried out for 30 seconds, 600 g of the above hard water was added, and rinsing was carried out twice under the conditions of a rotation speed of 100 rpm and a water temperature of 30 °C for 3 minutes at 30 °C with stirring. The reflectance of the cotton knitted fabric collected after two rinses was measured with a colorimetric color difference meter (Z-300A manufactured by Nippon Denshoku Co., Ltd.), and the obtained L * a * b * were used to calculate the color difference ΔE. ΔE is the color difference described in JIS Z8730, and L * a * b * The color difference system can be calculated from the following formula using the color difference system.

Equation

[0043] As shown in the examples of Table 1, by using a migration prevention composition containing a hydrate salt of AlCl 3 , ZnSO 4 , CuSO 4 as component (a) and a nitrogen-containing water-soluble organic substance as component (b), a good ΔE value was obtained.

[0044] On the other hand, in Comparative Example 1 that did not contain both component (a) and component (b) and Comparative Example 2 that contained only component (a), the ΔE value was 12.1 or more. In addition, in Comparative Example 3 using PEG (b') that did not contain a nitrogen atom instead of component (b), the ΔE value was also large. Further, in Comparative Example 4 where the pH at 0.1 mass% dilution was greater than 7 and Comparative Example 5 using NaCl (a'), which is a monovalent metal salt, the ΔE value was also large.

Claims

1. Component (a): a water-soluble divalent or higher metal salt, and Component (b): Nitrogen-containing water-soluble organic substance The dye transfer prevention composition contains the above compound and has a pH of 1 or more and 7 or less when mixed with water and used as a dye transfer prevention treatment agent.

2. The dye transfer prevention treatment composition according to claim 1, wherein the content of component (a) in the composition is 1% by mass or more and 40% by mass or less, and the content of component (b) in the composition is 0.01% by mass or more and 20% by mass or less.

3. 2. The dye transfer prevention composition according to claim 1, which has a pH of 2 or more and 7 or less when mixed with water and used as a dye transfer prevention treatment agent.

4. 2. The dye transfer prevention composition according to claim 1, which has a pH of 3 or more and 6 or less when mixed with water and used as a dye transfer prevention treatment agent.

5. 3. The dye transfer prevention composition according to claim 2, wherein the component (a) is less than 10% by mass, and the pH of the dye transfer prevention composition when mixed with water and used as a dye transfer prevention treatment agent is 1 or more and 5 or less.

6. 6. The dye transfer prevention composition according to claim 1, wherein the metal of component (a) is one or more metals selected from the group consisting of aluminum (III), zinc (II) and calcium (II).

7. 7. The dye transfer preventing composition according to claim 1, wherein the metal salt of component (a) is one or more metal salts selected from the group consisting of sulfates, chlorides and nitrates.

8. The dye transfer preventing composition according to any one of claims 1 to 7, wherein component (b) is selected from the group consisting of vinylpyridine, oxazolidone, N-vinylpyrrolidone, and N-vinylimidazole; polymers of vinylpyridine, oxazolidone, N-vinylpyrrolidone, and N-vinylimidazole; copolymers obtained from two or more selected from vinylpyridine, oxazolidone, N-vinylpyrrolidone, and N-vinylimidazole; and mixtures of two or more of these.

9. The dye transfer prevention composition according to claim 1 , further comprising one or more surfactants in an amount of 500% by mass or less based on the total content of component (a) and component (b).

10. A method for preventing dye transfer from a colored fiber to a white fiber when washing the white fiber in the presence of a colored fiber, comprising the steps of: The composition contains a component (a): a water-soluble divalent or higher metal salt, and a component (b): a nitrogen-containing water-soluble organic substance, in a total content of 0.001% by mass or more and 0.5% by mass or less, and containing water and having a pH of 1 or more and 7 or less; A method of contacting a dye transfer prevention treatment agent with colored and white textile materials.

11. 11. The method of claim 10, wherein the metal of component (a) is aluminum (III).

12. The method according to claim 10 or 11, wherein the component (b) is selected from the group consisting of vinylpyridine, oxazolidone, N-vinylpyrrolidone, and N-vinylimidazole; polymers of vinylpyridine, oxazolidone, N-vinylpyrrolidone, and N-vinylimidazole; copolymers obtained from two or more selected from vinylpyridine, oxazolidone, N-vinylpyrrolidone, and N-vinylimidazole; and mixtures of two or more of these.

13. 13. The method according to claim 10, further comprising mixing one or more surfactants in an amount of 500% by mass or less based on the total content of component (a) and component (b).

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