Polyazo dye compounds having vinylsulfone type and pyridinium type fiber reactive groups

Abstract: A polyazo compound of the following formula, -NR₂R₃, -OR₄ or -SR₅, in which R₁ is hydrogen or alkyl, R₂, R₃, R₄ and R₅ are each hydrogen, alkyl, phenyl, naphthyl or benzyl, A is phenylene, naphthylene or alkylene, Z is a fiber-­ reactive group of -SO₂CH=CH₂ or -SO₂CH₂CH₂Z′ in which Z′ is a splittable group, Y is pyridinio, and F is polyazo dye moiety carrying a fiber-reactive group like that represented by Z, which compound is useful for dyeing or printing fiber materials to obtain a product dyed or printed in a color superior in various fastness properties with superior build-up property.

Description: The present invention relates to polyazo compounds, a process for producing the same and a process for dyeing or printing fiber materials using the same. More specifically, the present invention relates to polyazo compounds having both vinylsulfone type fiber reactive group and pyridinium fiber reactive group in one molecule, which are particularly useful for dyeing fiber materials including hydroxy group and/or amide group-containing materials such as cellulose fiber, natural or synthetic polyamide fiber, polyurethane fiber, leather and mixed fibers thereof to give dyed or printed products superior in light and wet fastness properties. Polyazo fiber reactive dyes have been used for dyeing or printing fiber materials particularly those such as cellulose fibers. Of these, so-called vinylsulfone type fiber reactive dyes are prominent because of their superior dye performance. In recent years, however, needs for the fiber reactive dyes became severe from technical and economical point of view, and the actual level of technology is not yet satisfactory for meeting high demands particularly with respect to applicability for a specific dyeing technology and fastness properties of dyed or printed products. Fiber reactive dyes having both vinylsulfone type fiber reactive group and pyridiniumtriazinyl reactive group in one molecule are disclosed, for example, in JP-A-60-173060. However, they are still insufficient in the dye performance and await for improvement particularly with respect to solubility, build-up property and fastness properties. The properties of solubility, build-up and fastness are critical aspects of the use of any compound for dyeing or printing fiber materials, and the build-up property of a compound is its most significant property for use in dyeing or printing fiber materials. A compound with a high build-up property permits the use of lesser amounts of compound to achieve a color depth as compared to a given amount of compound having poor build-up property. Moreover, a compound having a high build-up property can achieve a deeper color than compounds having poor build-up property even though such poor build-up compounds are used in greater amounts. It is the object of the invention to provide improved fiber reactive dyes meeting extensive needs of high level. Said object of the present invention could be accomplished by combining a specific chromophore with both vinylsulfone type fiber reactive group and pyridiniumtriazinyl reactive group in a specific manner. The present invention relates to a polyazo compound of the following formula (I), wherein X is -NR₂R₃, -OR₄ or -SR₅, in which R₁ is hydrogen or unsubstituted or substituted alkyl, R₂, R₃, R₄ and R₅ independently of one another are each hydrogen, unsubstituted or substituted alkyl, unsubstituted or substituted phenyl, unsubstituted or substituted naphthyl or unsubstituted or substituted benzyl, A is unsubstituted or substituted phenylene, unsubstituted or substituted naphthylene or unsubstituted or substituted alkylene, and Z is -SO₂CH=CH₂ or -SO₂CH₂CH₂Z′ in which Z′ is a group capable of being split by the action of an alkali, Y is unsubstituted or substituted pyridinio, and F is a polyazo dye moiety selected from the group consisting of those represented by the following formulas (1), (2), (3) and (4) each in free acid form, the formula (1) being wherein B is in which the asterisked linkage binds to the azo group, and R₇ is hydrogen, methyl, methoxy or sulfo, D is naphthylene unsubstituted or substituted by sulfo or sulfophenylene, R₆ is hydrogen or unsubstituted or substituted alkyl, any one of X₁ and X₂ is -NH₂ and the other is -OH, and Z₁ is -SO₂CH=CH₂ or -SO₂CH₂CH₂Z₁′ in which Z₁′ is a group capable of being split by the action of an alkali, the formula (2) being wherein Z₁ is as defined above, R₈ is hydrogen or unsubstituted or substituted alkyl, B₁ is in which the linkage marked with ** binds to the group -N=N-D₁, R₉ is hydrogen, alkyl, alkoxy or sulfo, and R₁₀ is hydrogen, halogen, alkyl, alkoxy, alkylsulfonylamino, acylamino or ureido, and D₁ is unsubstituted or substituted phenylene or unsubstituted or substituted naphthylene, the formula (3) being wherein B₁, D₁ and Z₁ are as defined above, R₁₁ is hydrogen or unsubstituted or substituted alkyl, E is in which the linkage marked with *** binds to the group R₁₂ is hydrogen, alkyl, alkoxy or sulfo, and R₁₃ is hydrogen, halogen, alkyl, alkoxy, alkylsulfonylamino, acylamino or ureido, and the formula (4) being wherein B₁, D₁ and Z₁ are as defined above, and E is as defined above, provided that the linkage marked with *** binds to the azo group of R₁₄ is hydrogen or unsubstituted or substituted alkyl, and ℓ is 1 or 2. The present invention also provides a process for producing the polyazo compound of the formula (I), which comprises reacting a dye compound of the following formula (II), F - H (II) wherein F is as defined above, and any one of compounds of the following formulas (III) to (VI), HNR₂R₃ (IV) HOR₄ (V) HSR₅ (VI) wherein A, Z, R₁, R₂, R₃, R₄ and R₅ are as defined above, with a 2,4,6 trihalogeno-s-triazine to obtain a monohalogenotriazine compound of the following formula (VII), wherein F and X are as defined above, and T is halogen, and reacting the monohalogenotriazine of the formula (VII) with a pyridine compound. The present invention further provides a process for dyeing or printing fiber materials, which comprises using the polyazo compound of the formula (I). In the present invention, the alkyl represented by R₁, R₆, R₈, R₁₁ and R₁₄ is preferably one having 1 to 4 carbon atoms, and may be unsubstituted or substituted by hydroxy, cyano, C₁-C₄ alkoxy, halogen, carboxy, carbamoyl, C₁-C₄ alkoxycarbonyl, C₁-C₄ alkylcarbonyloxy, sulfo or sulfamoyl. Examples of those represented by them are hydrogen, methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, 2-hydroxybutyl, 3-hydroxybutyl, 4-hydroxybutyl, 2,3-dihydroxypropyl, 3,4-dihydroxybutyl, cyanomethyl, 2-cyanoethyl, 3-cyanopropyl, methoxymethyl, ethoxymethyl, 2-methoxyethyl, 2-ethoxyethyl, 3-methoxypropyl, 3-ethoxypropyl, 2-hydroxy-3-methoxypropyl, chloromethyl, bromomethyl, 2-chloroethyl, 2-bromoethyl, 3-cloropropyl, 3-bromopropyl, 4-chlorobutyl, 4-bromobutyl, carboxymethyl, 2-carboxyethyl, 3-carboxypropyl, 4-carboxybutyl, 1,2-dicarboxyethyl, carbamoylmethyl, 2-carbamoylethyl, 3-carbamoylpropyl, 4-carbamoylbutyl, methoxycarbonylmethyl, ethoxycarbonylmethyl, 2-methoxycarbonylethyl, 2-ethoxycarbonylethyl, 3-methoxycarbonylpropyl, 3-ethoxycarbonylpropyl, 4-methoxycarbonylbutyl, 4-ethoxycarbonylbutyl, methylcarbonyloxymethyl, ethylcarbonyloxymethyl, 2-methylcarbonyloxyethyl, 2-ethylcarbonyloxyethyl, 3-methylcarbonyloxypropyl, 3-ethylcarbonyloxypropyl, 4-methylcarbonyloxybutyl, 4-ethylcarbonyloxybutyl, sulfomethyl, 2-sulfoethyl, 3-sulfopropyl, 4-sulfobutyl, sulfamoylmethyl, 2-sulfamoylethyl, 3-sulfamoylpropyl and 4-sulfamoylbutyl . Of these, particularly preferred are hydrogen, methyl and ethyl. The alkyl represented by R₂ and R₃ is preferably one having 1 to 4 carbon atoms, and may be unsubstituted or substituted once or twice by C₁-C₄ alkoxy, sulfo, carboxy, hydroxy, chloro, phenyl or sulfato. Of these, particularly preferred are methyl, ethyl, n-propyl, iso propyl, n butyl, iso-butyl, sec butyl, β-hydroxyethyl, β-sulfatoethyl, β-sulfoethyl, β-methoxyethyl and β-carboxyethyl. The phenyl represented by R₂ and R₃ is preferably one unsubstituted or substituted once or twice by C₁-C₄ alkyl, C₁-C₄ alkoxy, sulfo, carboxy, chloro and bromo. Of these, particularly preferred are phenyl, 2-, 3- or 4-sulfophenyl, 2,4- or 2,5-disulfophenyl, 2-, 3- or 4-carboxyphenyl, 2-, 3- or 4-chlorophenyl, 2-, 3-or 4-methylphenyl and 2-, 3- or 4-methoxyphenyl. The naphthyl represented by R₂ and R₃ is preferably one unsubstituted or substituted once, twice or three times by hydroxy, carboxy, sulfo, C₁-C₄ alkyl, C₁-C₄ alkoxy or chloro. Of these, particularly preferred are 2-, 3-, 4-, 5-, 6-, 7- or 8-sulfo-1-naphthyl, 1-, 5-, 6-, 7- or 8-sulfo-2-naphthyl, 1,5-, 5,7-, 6,8-, 4,8-, 4,7-, 3,8-, 4,6-, 3,7- or 3,6-disulfo-2-naphthyl, 4,6,8-, 2,4,7- or 3,6,8-trisulfo-1-naphthyl and 1,5,7-, 4,6,8- or 3,6,8-trisulfo-2-naphthyl. The benzyl represented by R₂ and R₃ is preferably one unsubstituted or substituted once or twice by C₁-C₄ alkyl, C₁-C₄ alkoxy, sulfo or chloro. Of these, particularly preferred are benzyl and 2-, 3- or 4-sulfobenzyl. In the present invention, the case where any one of R₂ and R₃ is hydrogen, methyl or ethyl, and the other is phenyl unsubstituted or substituted by C₁-C₄ alkyl, C₁-C₄ alkoxy, sulfo, carboxy or halogen is particularly preferred from viewpoint of dye performance. Examples of a compound represented by the formula, HNR₂R₃, which is capable of forming the group -NR₂R₃ as X in the formula (I), are ammonia, aromatic amines and aliphatic amines, the aromatic amines including 1-aminobenzene, 1-amino-2-, 3- or 4-methylbenzene, 1-amino-3,4- or 3,5-dimethylbenzene, 1-amino-2-, 3- or 4-ethylbenzene, 1-amino-2-, 3-or 4-methoxybenzene, 1-amino-2, 3- or 4-ethoxybenzene, 1-amino-2-, 3- or 4-chlorobenzene, 3- or 4-aminophenylmethanesulfonic acid, 2-, 3- or 4-aminobenzenesulfonic acid, 3-methylaminobenzenesulfonic acid, 3-ethylaminobenzenesulfonic acid, 4-methylaminobenzenesulfonic acid, 4-ethylaminobenzenesulfonic acid, 5-aminobenzene-1,3-disulfonic acid, 6-aminobenzene-1,3-disulfonic acid, 6-aminobenzene-1,4-disulfonic acid, 4-aminobenzene-1,2-dislfonic acid, 4-amino-5-methylbenzene-1,2-disulfonic acid, 2-, 3- or 4-aminobenzoic acid, 5-aminobenzene-1,3-dicarboxylic acid, 5-amino-2-hydroxybenzenesulfonic acid, 4-amino-2-hydroxybenzenesulfonic acid, 5-amino-2-ethoxybenzenesulfonic acid, N-methylaminobenzene, N-ethylaminobenzene, 1-methylamino-3- or 4-methylbenzene, 1-methylamino-2-, 3- or 4-chloro benzene, 1-ethylamino-2-, 3- or 4-chlorobenzene, 1-ethylamino-3- or 4-methylbenzene, 1-(2-β-hydroxyethyl)amino-3-methylbenzene, 3- or 4-methylaminobenzoic acid, 3- or 4-methylaminobenzenesulfonic acid, 2-aminonaphthalene-1-sulfonic acid, 4-aminonaphthalene-1-sulfonic acid, 5-aminonaphthalene-1 sulfonic acid, 6-aminonaphthalene-1-sulfonic acid, 7-aminonaphthalene-1-sulfonic acid, 8-aminonaphthalene 1-sulfonic acid, 1-aminonaphthalene-2-sulfonic acid, 4-aminonaphthalene-2-sulfonic acid, 5-aminonaphthalene-2-sulfonic acid, 6-aminonaphthalene-2-sulfonic acid, 7-aminonaphthalene-2-sulfonic acid, 7-methylaminonaphthalene-2-sulfonic acid, 7-ethylaminonaphthalene-2-sulfonic acid, 7-butylaminonaphthalene-2-sulfonic acid, 7-isobutylaminonaphthalene-2-sulfonic acid, 8-aminonaphthalene-2-sulfonic acid, 4-aminonaphthalene-1,3-disulfonic acid, 5-aminonaphthalene-1,3-disulfonic acid, 6-aminonaphthalene-1,3-disulfonic acid, 7-aminonaphthalene-1,3-disulfonic acid, 8-aminonaphthalene-1,3-disulfonic acid, 2-aminonaphthalene-1,5-disulfonic acid, 3-aminonaphthalene-1,5-disulfonic acid, 4-aminonaphthalene-1,5-disulfonic acid, 4-aminonaphthalene-1,6-disulfonic acid, 8-aminonaphthalene-1,6-disulfonic acid, 4-aminonaphthalene-1,7-disulfonic acid, 3-aminonaphthalene-2,6-disulfonic acid, 4-aminonaphthalene-2,6-disulfonic acid, 3-aminonaphthalene-2,7-disulfonic acid, 4-aminonaphthalene-2,7-disulfonic acid, 6-aminonaphthalene-1,3,5-trisulfonic acid, 7-aminonaphthalene-1,3,5-trisulfonic acid, 4-aminonaphthalene-1,3,6-trisulfonic acid, 7-aminonaphthalene-1,3,6-trisulfonic acid, 8-aminonaphthalene-1,3,6-trisulfonic acid and 4-aminonaphthalene-1,3,7-trisulfonic acid, and the aliphatic amines including methylamine, ethylamine, n-propylamine, isopropylamine, n-butylamine, isobutylamine, sec-butylamine, dimethylamine, diethylamine, methylethylamine, allylamine, 2-chloroethylamine, 2-methoxyethylamine, 2-aminoethanol, 2-methylaminoethanol, bis-(2-hydroxyethyl)amine, 2-acetylaminoethylamine, 1-amino-2-propanol, 3-methoxypropylamine, 1-amino-3-dimethylaminopropane, 2-aminoethanesulfonic acid, aminomethanesulfonic acid, 2-methylaminoethanesulfonic acid, 3-amino-1-propanesulfonic acid, 2-sulfatoethylamine, aminoacetic acid, methylaminoacetic acid, ε-aminocaproic acid, benzylamine, 2-, 3- or 4-chlorobenzylamine, 4-methylbenzylamine, N-methylbenzylamine, 2-, 3- or 4-sulfobenzylamine, 2-phenylethylamine, 1-phenylethylamine, and 1-phenyl-2-propylamine. Of these, preferred are, for example, aniline, N-methylaniline, N-ethylaniline, 2-, 3- or 4-sulfoaniline, 2-, 3- or 4-chloroaniline, N-methyl-2-, 3- or 4-chloroaniline, N-ethyl-2-, 3- or 4-chloroaniline, 2-, 3- or 4-methylaniline, aniline-2,4- or 2,5-disulfonic acid, 3- or 4-methylaminobenzenesulfonic acid, 3- or 4-ethylaminobenzenesulfonic acid, 2-, 3- or 4-carboxyaniline, taurine, N-methyltaurine and mono- or diethanolamine. The alkyl represented by R₄ and R₅ is preferably one having 1 to 4 carbon atoms, and may be unsubstituted Or substituted Once or twice by C₁-C₄ alkoxy, sulfo, carboxy, hydroxy, chloro, phenyl, cyano or sulfato. Of these, preferred are, for example, methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, β-hydroxyethyl, β-sulfatoethyl, β-sulfoethyl, β-methoxyethyl, β-ethoxyethyl, β-chloroethyl and β-carboxyethyl. The phenyl represented by R₄ and R₅ is preferably one unsubstituted or substituted once or twice by C₁-C₄ alkyl, C₁-C₄ alkoxy, sulfo, carboxy, chloro or bromo. Of these, preferred are, for example, phenyl, 2-, 3- or 4-sulfophenyl, 2,4- or 2,5-disulfophenyl, 2-, 3- or 4-chlorophenyl, 2-, 3- or 4-methylphenyl and 2-, 3- or 4-methoxyphenyl. The naphthyl represented by R₄ and R₅ is preferably one unsubstituted or substituted once, twice or three times by hydroxy, carboxy, sulfo, C₁-C₄ alkyl, C₁-C₄ alkoxy or chloro. Of these, preferred are, for example, 2-, 3-, 4-, 5-, 6-, 7- or 8-sulfo-1-naphthyl, 1-, 5-, 6-, 7- or 8-sulfo-2-naphthyl, 1,5-, 5,7-, 6,8-, 4,8-, 4,7-, 3,8-, 4,6-, 3,7- or 3,6-disulfo-2-naphtyl, 4,6,8-, 2,4,7- or 3,6,8-trisulfo-1-naphthyl and 1,5,7-, 4,6,8- or 3,6,8-trisulfo-2-naphthyl. The benzyl represented by R₄ and R₅ is preferably one unsubstituted or substituted once or twice by C₁-C₄ alkyl, C₁-C₄ alkoxy, sulfo or chloro. Of these, preferred are, for example, benzyl and 2-, 3- or 4-sulfobenzyl. Examples of a compound represented by the formula, R₄OH, which is capable of forming the group -OR₄ as X in the formula (I), are aromatic and aliphatic hydroxy compounds, the aromatic hydroxy compounds including phenol, 1-hydroxy-2-, 3- or 4-methylbenzene, 1-hydroxy-3,4- or 3,5-dimethylbenzene, 1-hydroxy-2-, 3-or 4-ethylbenzene, 1-hydroxy-2-, 3- or 4-methoxybenzene, 1-hydroxy-2-, 3- or 4-chlorobenzene, 3- or 4-hydroxyphenylmethanesulfonic acid, 3-hydroxybenzenesulfonic acid, 4-hydroxybenzenesulfonic acid, 5-hydroxybenzene-1,3-disulfonic acid, 6-hydroxybenzene-1,4-disulfonic acid, 4-hydroxybenzene-1,2-disulfonic acid, 4-hydroxy-5-methylbenzene-1,2-disulfonic acid, 3- or 4-hydroxybenzoic acid, 5-hydroxybenzene-1,3-dicarboxylic acid, 5-hydroxy-2-ethoxybenzenesulfonic acid, 2-hydroxynaphthalene-1-sulfonic acid, 4-hydroxynaphthalene-1-sulfonic acid, 5-hydroxynaphthalene-1-sulfonic acid, 6-hydroxynaphthalene-1-sulfonic acid, 7-hydroxynaphthalene-1-sulfonic acid, 8-hydroxynaphthalene-1-sulfonic acid, 1-hydroxynaphthalene-2-sulfonic acid, 4-hydroxynaphthalene-2-sulfonic acid, 5-hydroxynaphthalene-2-sulfonic acid, 6-hydroxynaphthalene-2-sulfonic acid, 7-hydroxynaphthalene-2-sulfonic acid, 8-hydroxynaphthalene-2-sulfonic acid, 4-hydroxynaphthalene-1,3-disulfonic acid, 5-hydroxynaphthalene-1,3-disulfonic acid, 6-hydroxynaphthalene-1,3-disulfonic acid, 7-hydroxynaphthalene-1,3-disulfonic acid, 8-hydroxynaphthalene-1,3-disulfonic acid, 2-hydroxynaphthalene-1,5-disulfonic acid, 3-hydroxynaphthalene-1,5-disulfonic acid, 4-hydroxynaphthalene-1,5-disulfonic acid, 4-hydroxynaphthalene-1,6-disulfonic acid, 8-hydroxynaphthalene-1,6-disulfonic acid, 4-hydroxynaphthalene-1,7-disulfonic acid, 3-hydroxynaphthalene-2,6-disulfonic acid, 4-hydroxynaphthalene-2,6-disulfonic acid, 3-hydroxynaphthalene-2,7-disulfonic acid, 4-hydroxynaphthalene-2,7-disulfonic acid, 6-hydroxynaphthalene-1,3,5-trisulfonic acid, 7-hydroxynaphthalene-1,3,5-trisulfonic acid, 4-hydroxynaphthalene-1,3,6-trisulfonic acid, 7-aminonaphthalene-1,3,5-trisulfonic acid, 8-aminonaphthalene-1,3,6-trisulfonic acid and 4-aminonaphthalene-1,3,7-trisulfonic acid, and the aliphatic hydroxy compounds including methanol, ethanol, n-propanol, iso-propanol, n-butanol, iso-butanol, sec-butanol, 2-chloroethanol, 2-methoxyethanol, 2-ethoxyethanol, 3-methoxypropanol, 3-ethoxypropanol, 2-hydroxyethanesulfonic acid, 3-hydroxy-1-propanesulfonic acid, 2-cyanoethanol, glycollic acid, 3-hydroxypropionic acid, benzyl alcohol, 2-, 3- or 4-chlorobenzyl alcohol, 4-methylbenzyl alcohol, 2-, 3- or 4-sulfobenzyl alcohol, 2-phenylethanol and 1-phenyl-2-propanol. Examples of a compound represented by the formula, R₅SH, which is capable of forming the group -SR₅ as X in the formula (I) are those examplified above for the compound of the formula R₅OH, provided that the hydroxy is replaced by mercapto. The phenylene represented by A is preferably one unsubstituted or substituted once or twice by methyl, ethyl, methoxy, ethoxy, chloro, bromo or sulfo, and the naphthylene represented thereby is preferably one unsubstituted or substituted by sulfo. Examples thereof are as follows: wherein the linkage marked with **** binds to the group The alkylene represented by A is preferably one represented by the following formula (a), (b) or (c), -(CH₂) n -O-(CH₂) m -**** (b) wherein the linkage marked with **** is as defined above, alk is polymethylene having 1 to 6 carbon atoms or its branched isomer, R′ is hydrogen, chloro, bromo, fluoro, hydroxy, sulfato, C₁-C₄ acyloxy, cyano, carboxy, C₁-C₅ alkoxycarbonyl or carbamoyl, R″ is hydrogen or C₁-C₆ alkyl, each alk′ is independently polymethylene having 2 to 6 carbon atoms or its branched isomer, or each alk′ is taken together with R″ to form a ring through methylene, m and n are each independently an integer of 1 to 6. Preferable examples of the polymethylene or its isomer represented by alk are methylene, ethylene, methylmethylene, propylene and butylene. Examples of those represented by R″ are hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl and hexyl. Of these, hydrogen is preferred. Preferable examples of the polymethylene or its isomer represented by alk′ are ethylene, propylene and butylene. Preferable integers as m and n are each independently 2, 3 or 4. Examples of the group represented by B are in which the asterisked linkage is as defined above. Of these, preferred examples are in which the asterisked linkage is as defined above. Examples of the naphthylene and sulfophenylene represented by D are in which the asterisked linkage binds to another azo group in the formula (1). Of these, preferred are those carrying sulfo at ortho position against the azo group, such as, for example, in which the asterisked linkage is as defined above. The phenylene represented by D₁ is preferably one unsubstituted or substituted once or twice by methyl, ethyl, methoxy, ethoxy, chloro, bromo or sulfo, and the naphthylene represented thereby is preferably one unsubstituted or substituted by sulfo. Examples thereof are in which the linkage marked with ***** binds to the azo group. Of these, preferred are those carrying sulfo, such as, for example, in which the linkage marked with ***** is as defined above. The group capable of being split by the action of an alkali represented by Z′ and Z₁′ includes, for example, sulfuric acid ester group, thiosulfuric acid ester group, phosphoric acid ester group, acetic acid ester group and halogen. Of these, sulfuric acid ester group is preferred. The pyridinio represented by Y is preferably one unsubstituted or substituted by carboxy, carbamoyl, sulfo, halogen Or unsubstituted Or substituted C₁-C₄ alkyl such as β-hydroxyethyl and β-sulfoethyl. Of these, preferred is pyridinio substituted by carboxy or carbamoyl. Carboxypyridinio is particularly preferred from viewpoint of dye performance. Examples of pyridine compounds capable of forming the pyridinio are pyridine, 2-, 3- or 4-carboxylpyridine, 2-, 3- or 4-carbamoylpyridine, 3-sulfopyridine, 4-β-sulfoethylpyridine, 3-β-hydroxyethylpyridine, 4-chloropyridine, 3-methylpyridine and 3,5-dicarboxypyridine. Of these, particularly preferred are 3-carboxypyridine (nicotinic acid) and 4-carboxypyridine (isonicotinic acid). In the present invention, the polyazo dye moiety represented by F comprises those represented by the above formulas (1) to (4). Among those represented by the formula (1), preferred is a case where D is naphthylene unsubstituted or substituted by sulfo, B is wherein R₇ and the asterisked linkage are as defined above, and R₆ is hydrogen. More specifically, preferred is one represented by the following formula, wherein X₁, X₂, Z₁ and R₇ are as defined above. With respect to the polyazo dye moieties represented by the formulas (2) to (4), the alkyl, alkyl moiety in the alkylsulfonylamino and alkoxy, and acylmoiety in the acylamino represented by R₉, R₁₀, R₁₂ and/or R₁₃ are preferably ones having 1 to 4 carbon atoms, such as methyl, ethyl, acetyl and propionyl, respectively, and the halogen represented by them is preferably chlorine. More concretely speaking for the polyazo dye moieties represented by the formulas (1) to (4), examples of dye compounds constituting the dye moieties are given as follows. Dye compounds represented by the following formula (1)′ in the free acid form, wherein D, X₁, X₂, B and R₆ are as defined above, include, for example, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(5″-amino-2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(5″-amino-2″-sulfophenylazo)-8-aminonaphthalene-3,5-disulfonic acid, 1-hydroxy-2-(5′-amino-2′-sulfophenylazo)-7-(1″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(5′-amino-2′-sulfophenylazo)-7-(1″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,5-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(5″-amino-2″,4″-disulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(5″-amino-2″,4″-disulfophenylazo)-8-aminonaphthalene-3,5-disulfonic acid, 1-hydroxy-2-(5′-amino-2′,4′-disulfophenylazo)-7-(1″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(5′-amino-2′,4′-disulfophenylazo)-7-(1″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,5-disulfonic acid, 1-hydroxy-2-(1′,7′-disulfonaphth-2′-ylazo)-7-(5″-amino-2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(5′-amino-2′-sulfophenylazo)-7-(1″,7″-disulfophenylnaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(5′-amino-2′-sulfophenylazo)-7-(6″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(5′-amino-2′-sulfophenylazo)-7-(8″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(5′-amino-2′-sulfophenylazo)-7-(6″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,5-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(4″-amino-2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(4″-amino-2″,5″-disulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(4″-amino-2″,5″-disulfophenylazo)-8-aminonaphthalene-3,5-disulfonic acid, 1-hydroxy-2-(1′-sulfo-5′-aminomethylnaphth-2′-ylazo)-7-(2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(2′-sulfophenylazo)-7-(1″-sulfo-5″-aminomethylnaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfo-5′-aminomethylnaphth-2′-ylazo)-7-(1″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(1″-sulfo-5″-aminomethylnaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′,7′-disulfo-5′-aminoethylnaphth-2′-ylazo)-7-(2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(2′-sulfophenylazo)-7-(1″,7″-disulfo-5″-aminomethylnaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(5′-aminomethyl-4′-methyl-2′-sulfophenylazo)-7-(1″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(5″-aminomethyl-4″-methyl-2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(2′-sulfophenylazo)-7-(5″-amino-2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(5′-amino-2′-sulfophenylazo)-7-(2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(2′-sulfophenylazo)-7-(5″-amino-2″, 4″-disulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(1″,7″-disulfo-5″-aminomethylnaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(5″-amino-4″-methyl-2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid. 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(4″-amino-5″-methoxy-2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(1′-sulfonaphth-2′-ylazo)-7-(5″-amino-4″-methoxy-2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(2′-sulfophenylazo)-7-(4″-amino-5″-methoxy-2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(4′-amino-5′-methoxy-2′-sulfophenylazo)-7-(1″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-2-(5′-amino-4′-methoxy-2′-sulfophenylazo)-7-(1″-sulfonaphth-2″-ylazo)-8-aminonaphthalene-3,6-disulfonic acid, and 1-hydroxy-2-(4′-amino-5′-methoxy-2′-sulfophenylazo)-7-(2″-sulfophenylazo)-8-aminonaphthalene-3,6-disulfonic acid. Dye compounds represented by the following formula (2)′ in the free acid form, wherein D₁, B₁ and R₈ are as defined above, include, for example, 8-amino-1-hydroxy-2-[4′-(1″-sulfonaphth-2″-ylazo)-2′-methoxy-5′-methylphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(1″,7″-disulfonaphth-2″-ylazo)-2′-methoxy-5′-methylphenylazo]naphthalene-3,6-or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(6″-sulfonaphth-2″-ylazo)-2′-methoxy-5′-methylphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(8″-sulfonaphth-2″-ylazo)-2′-methoxy-5′-methylphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(2″-sulfophenylazo)-2′-methoxy-5′-methylphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(1″-sulfonaphth-2″-ylazo)-2′,5′-dimethoxyphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(1″,7″-disulfonaphth-2″-ylazo)-2′,5′-dimethylphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(6″-sulfonaphth-2″-ylazo)-2′,5′-dimethylphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-phenylazo-2′-methoxy-5′-methylphenylazo]naphthalene-3,6-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(2″-methoxyphenylazo)2′-methoxy-5′-methylphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(4″-methoxyphenylazo)-2′-methoxy-5′-methylphenylazo]naphthalene-3,6-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(1″-sulfonaphth-2″-ylazo)-2′-methoxy-5′-acetylaminophenylazo]naphthalene-3,6-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(6″-sulfonaphth-2″-ylazo)-2′-methoxy-5′-acetylaminophenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(1″,7″-disulfonaphth-2″-ylazo)-2′-methoxy-5′-acetylaminophenylazo]naphthalene-3,6-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(6″-sulfonaphth-2″-ylazo)-2′,5′-dimethylphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(6″-sulfonaphth-2″-ylazo)-5′-ureidophenylazo]naphthalene-3,6-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(6″-sulfonaphth-1″-ylazo)-7′-sulfonaphth-1′-ylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(1″-sulfonaphth-2″-ylazo)-6′-sulfonaphth-1′-ylazo]naphthalene-3,6-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(1″-sulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]naphthalene-3,6- or 3,5-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(1″-sulfonaphth-2″-ylazo)-5′-methylphenylazo]naphthalene-3,6-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(6″-sulfonaphth-2″-ylazo)-5′-methylphenylazo]naphthalene-3,6-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(6″-sulfonaphth-2″-ylazo)-2′-sulfonaphth-1′-ylazo]naphthalene-3,6-disulfonic acid, 8-amino-1-hydroxy-2-[4′-(6″-sulfonaphth-2″-ylazo)-2′-ethoxy-5′-methylphenylazo]naphthalene-3,6- or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(1″-sulfo-2″-naphthylazo)-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(2″-naphthylazo)-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(1″,7″-disulfo-2″-naphthylazo)-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(6″-sulfo-2″-naphthylazo)-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(8″-sulfo-2″-naphthylazo)-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(1″-sulfo-2″-naphthylazo)-2′-sulfo-5′-ureidophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(6″-sulfo-2″-naphthylazo)-2′-sulfo-5′-ureidophenylazo]naphthalene-3-sulfonic or 3,5 disulfonic acid, 6-amino-1-hydroxy-2-(4′-phenylazo-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(1″-sulfo-2″-naphthylazo)-2′-sulfo-5′-methylphenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(6″-sulfo-2″-naphthylazo)-2′-sulfo-5′-methylphenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(1″-sulfo-2″-naphthylazo)-2′-methoxy-5′-methylphenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(6″-sulfo-2″-naphthylazo)-2′-methoxy-5′-methylphenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(1″-sulfo-2″-naphthylazo)-2′-sulfo-5′-acetylaminophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-(4′-phenylazo-2′-sulfo-5′-acetylaminophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(7″-sulfo-2″-naphthylazo)-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(1″-sulfo-2″-naphthylazo)-2′-sulfo-5′-methoxyphenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(1″-sulfo-2″-naphthylazo)-2′-sulfo-5′-chlorophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-(4′-phenylazo-2′-sulfo-5′-methylphenylazo)naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-(4′-phenylazo-2′-sulfo-5′-ureidophenylazo)naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(1″-sulfo-2″-naphthylazo)-2′-carboxyphenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(6″-sulfo-2″-naphthylazo)-2′-sulfo-5′-acetylaminophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(2″-naphthylazo)-2′-sulfo-5′-ureidophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(2″-naphthylazo)-2′-sulfo-5′-methylphenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(2″-methoxyphenylazo)-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, 6-amino-1-hydroxy-2-[4′-(2″-sulfophenylazo)-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid, and 6-amino-1-hydroxy-2-[4′-(4″-methoxyphenylazo)-2′-sulfophenylazo]naphthalene-3-sulfonic or 3,5-disulfonic acid. Dye compounds represented by the following formula (3)′ in the free acid form, wherein D₁, B₁, E and R₁₁ are as defined above, include, for example, 4-[4′-(1″-sulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(6″-sulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(1″,7″-disulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(8″-sulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(2″-sulfophenylazo)-7′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(1″-sulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(6″-sulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(1″,7″-disulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(8″-sulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(2″-sulfophenylazo)-7′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(1″-sulfonaphth-2″-ylazo)-6′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(6″-sulfonaphth-2″-ylazo)-6′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(1″,7″-disulfonaphth-2″-ylazo)-6′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(6″-sulfonaphth-2″-ylazo)-6′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(2″-sulfophenylazo)-6′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(1″-sulfonaphth-2″-ylazo)-6′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(8″-sulfonaphth-2″-ylazo)-6′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(1″,7″-disulfonaphth-2″-ylazo)-6′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(8″-sulfonaphth-2″-ylazo)-6′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(2″-sulfophenylazo)-6′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-phenylazo-7′-sulfonaphth-1′-ylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-phenylazo-7′-sulfonaphth-1′-ylazo]-3-methyl-1-aminobenzene, 4-[4′-(2″-sulfophenylazo)-2′,5′-dimethylphenylazo]-1-naphthylamine-8-sulfonic acid, 4-[4′-(2″,5″-disulfonaphth-1″-ylazo)-2′,5′-dimethylphenylazo]-1-naphthylamine-6-sulfonic acid, 4-[4′-(2″,7″-disulfonaphth-1″-ylazo)-2′,5′dimethylphenylazo]-1-naphthylamine-7-sulfonic acid, 4-[4′-(2″,7″-disulfonaphth-1″-ylazo)naphth-1′-ylazo]-1-naphthylamine-6-sulfonic acid, 4-[4′-(2″-sulfophenylazo)-2′-sulfophenylazo]-1-naphthylamine-6-sulfonic acid, 4-[4′-(6″-sulfonaphth-2″-ylazo)-2′-methoxy-5′-acetylaminophenylazo]-1-aminonaphthalene-8-sulfonic acid, 4-[4′-(6″-sulfonaphth-2″-ylazo)-2′-methoxy-5′-acetylaminophenylazo]-3-methyl-1-aminobenzene, 4-[4′-(1″,7″-disulfonaphth-2″-ylazo)-2′-methylphenylazo]-2-methoxy-5-methyl-1-aminobenzene, 4-[4′-(1″,7″-disulfonaphth-2″-ylazo)phenylazo]-3-methyl-1-aminobenzene, 4-[4′-(1″,7″-disulfonaphth-2″-ylazo)-3′-acetylaminophenylazo]-3-methyl-1-aminobenzene, 4-[4′-(6″-sulfonaphth-2″ ylazo)-7′-sulfonaphth-1′-ylazo]-2,5-dimethyl-1-aminobenzene, 4-[4′-(1″,7″-disulfonaphth-2″-ylazo)-7′-sulfonaphth-1′-ylazo]-2,5-dimethyl-1-aminobenzene, 4-[4′-(6″-sulfonaphth-2″-ylazo)-3′-ureidophenylazo]-2-methoxy-5-methyl-1-aminobenzene, and 4-[4′-(1″,7″-disulfonaphth-2″-ylazo)phenylazo]-1-aminobenzene. Examples of dye compounds represented by the following formula (4)′ in the free acid form, wherein D₁, B₁, E, R₁₄ and ℓ are as defined above, are obvious with reference to Examples described below. The polyazo compound of the formula (I) can be readily produced by reacting the dye compound of the formula (II) and any one of compounds of the formulas (III) to (VI) with a 2,4,6-trihalogeno-s-traiazine in an optional order to obtain the monohalogenotriazine compound of the formula (VII), and reacting the monohalogenotriazine compound (VII) with the pyridine compound. The order of reactions with the 2,4,6-trihalogeno-s-triazine and the reaction conditions are not particularly limited. Preferably, a first reaction can be carried out at a temperature of -10° to 40°C within a pH range of 2 to 9, a second reaction at a temperature of 0° to 70°C within a pH range of 2 to 9, and a third reaction at a temperature of 10° to 100°C within a pH range of 2 to 7, thereby obtaining the desired polyazo compound of the formula (I) or a salt thereof. In the above, the 2,4,6-trihalogeno-s-triazine is preferably cyanuric chloride or fluoride. After completion of the reaction, the desired polyazo compound-containing reaction mixture may be formed into a liquid commercial product, if desired, after removing inorganic salts and with addition of a stabilizer or a dyeing improver. The liquid product obtained or the aforesaid reaction mixture may be subjected to evaporation or spray-drying, thereby obtaining a solid commercial product. Alternatively, according to a conventional manner, the reaction mixture may be formed into either a liquid or solid commercial product through salting-out using an electrolyte. The polyazo compound (I) in accordance with the present invention may be in the form of a free acid or preferably in the form of alkali metal or alkaline earth metal salt such as sodium, potassium or lithium salt. The polyazo compound (I) of the present invention is fiber-reactive and useful for dyeing or printing hydroxyl group-containing and amide group-containing materials in a fibrous form including unmixed or mixed fibers. The hydroxyl group-containing materials include natural or synthetic hydroxyl group-containing materials such as cellulose fiber materials, regenerated products thereof and polyvinyl alcohol. Examples of the cellulose fiber materials are cotton and other vegetable fibers such as linen, hemp, jute and ramie fibers. Examples of the regenerated cellulose fibers are viscose staple and filament viscose. The amide group-containing materials include synthetic or natural polyamide and polyurethane. Examples of the materials, particularly in the fibrous forms, are wool and other animal furs, silk, leather, polyamide-6,6, polyamide-6, polyamide-11 and polyamide-4. The dyeing may be carried cut in a suitable manner, which can be selected from conventional manners depending on the physical and chemical properties of said fiber materials. For example, cellulose fiber materials can be dyed using the polyazo compound by an exhaustion dyeing, padding including cold batch-up dyeing or printing method. The exhaustion dyeing can be carried out at a relatively low temperature in the presence of an acid binding agent such as sodium carbonate, trisodium phosphate, sodium hydroxide and the like, if desired, using a neutral salt such as sodium sulfate, sodium chloride and the like, together with a hydrotropic agent, a penetrant or a level dyeing agent. The neutral salt suitable for promoting the exhaustion may be added to a dye bath before or after temperature reaching a desired level for the dyeing, if desired, dividedly. The padding can be carried out by padding the fiber materials at ambient temperature or an elevated temperature, and after drying, steaming or dry-heating the materials to perform the dye-fixation. The printing can be carried out in a one-phase or two-phase manner. The one-phase printing may be conducted by printing the fiber materials with a printing paste containing an acid binding agent such as sodium hydrogencarbonate and the like, followed by steaming at a temperature of 100° to 160°C. The two-phase printing may be conducted by printing the fiber materials with a neutral or weakly acidic printing paste, and passing the materials through a hot alkaline bath containing an electrolyte or over-padding the materials with an alkaline padding liquor containing an electrolyte, followed by a steaming or dry-heating treatment. For the preparation of the printing paste, a paste or emulsifier such as sodium alginate and starch ether may be used, if desired, together with a conventional auxiliary agent such as urea and/or dispersing agent. The acid binding agent useful for fixing the compound of the present invention on the cellulose fiber materials includes water-soluble basic salts consisting of alkali or alkaline earth metals and inorganic or organic acids or compounds capable of liberating alkali under heating conditions. Preferred are alkali metal hydroxides and alkali metal salts of inorganic or organic acids having a weak or medium strength. Particularly preferred are sodium salts and potassium salts. Examples thereof are sodium hydroxide, potassium hydroxide, sodium hydrogencarbonate, sodium carbonate, sodium formate, potassium carbonate, sodium dihydrogenphosphate, disodium hydrogenphosphate, trisodium phosphate, sodium silicate and sodium trichloroacetate. The dyeing of natural or synthetic polyamide and polyurethane fiber materials can be carried out by performing exhaustion in an acid or weak acid bath, while controlling the pH value, and then making the bath neutral, or in some cases alkaline to perform the fixation. The dyeing temperature ranges usually from 60° to 120°C. In order to achieve a level dyeing, there may be used a conventional level dyeing agent such as condensation product between cyanuric chloride and 3 times by mole of aminobenzenesulfonic acid or aminonaphthalene-sulfonic acid, or an addition product between stearylamine and ethylene oxide . The polyazo compound of the present invention can be characterized by excellent dye performance in the dyeing and printing of fiber materials, particularly those such as cellulose fiber materials. For example, the compound can give a dyed product excellent in light fastness, perspiration-light fastness, wet fastness such as washing resistance, peroxide-washing resistance, chlorine resistance, perspiration resistance and acid-hydrolysis resistance, and alkali fastness, abrasion fastness and iron fastness. The polyazo compound can also exhibit extremely excellent build-up, level-dyeing and washing-off properties and high solubility as well as high exhaustion and fixation percentages. Moreover, when used for the dyeing or printing, the polyazo compound can hardly be affected by changes in dye bath conditions such as dyeing temperature and bath ratios, and therefore dyed or printed products can be obtained with a constant quality. Furthermore, the dyed or printed products in accordance with the present invention are hard to be changed in their color on a fix-treatment or resin-finishing, or in contact with a basic material during storage. The present invention is illustrated in more detail with reference to the following Examples. In examples, parts and % are by weight, unless otherwise specified. Example 1 In a usual manner, 2,4-diaminobenzenesulfonic acid (4.70 parts) and cyanuric chloride (4.61 parts) were allowed to react with each other, followed by successive condensation reaction with aniline (2.33 parts), the resulting condensate was diazotized and then coupled with 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid (7.33 parts) under strong acid conditions, and the monoazo compound obtained was further coupled with a diazonium compound of 2-naphthylamine-6-β-sulfatoethylsulfone-1-sulfonic acid (10.25 parts). Finally, the intermediate bisazo compound obtained was subjected to substitution reaction with 3-carboxypyridine (3.1 parts) at a temperature of 70° to 80°C. The reaction mixture was after-treated in usual manners including salting-out with sodium chloride to obtain a bisazo compound represented by the following formula in the free acid form. Example 2 Example 1 was repeated, provided that the 2-naphthylamine 6-β-sulfatoethylsulfone-1-sulfonic acid, 2,4-diaminobenzenesulfonic acid, 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid, aniline and 3-carboxypyridine were replaced by those shown in columns 2 to 6 of the following table, respectively, thereby obtaining a corresponding bisazo compound. The bisazo compound was used for dyeing cellulose fibers to obtain a dyed product of a color as shown in a column 7 of the following table. Example 3 Example 1 was repeated, provided that the coupling order using respective diazonium compounds was reversed, thereby obtaining a bisazo compound represented by the following formula in the free acid form. Example 4 Example 3 was repeated, provided that the 2-naphthylamine 6-β-sulfatoethylsulfone-1-sulfonic acid, 2,4-diaminobenzenesulfonic acid, 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid, aniline and 3-carboxypyridine were replaced by those shown in columns 2 to 6 of the following table, respectively, thereby obtaining a corresponding bisazo compound. The bisazo compound was used for dyeing cellulose fibers to obtain a dyed product of a color as shown in a column 7 of the following table. Example 5 Run Nos. 1 to 32 of Example 2 were repeated, provided that the compound shown in the column 5 was replaced by those shown below, thereby obtaining a corresponding bisazo compound. phenol phenol-2,3- or 4-sulfonic acid phenol-2,4- or 2,5-disulfonic acid benzylamine benzylamine-2-, 3- or 4-sulfonic acid taurine N-methyltaurine β-alanine mono- or di-ethanolamine In the manner described in Example 4, the above was repeated to obtain a corresponding bisazo compound. Example 6 Each bisazo compound described in Examples 1 to 5 (each 0.1, 0.3 and 0.6 part) was dissolved in water (200 parts), and sodium sulfate (10 parts) and cotton (10 parts) were added thereto. The bath was heated to 60°C, and then sodium carbonate (4 parts) was added thereto. Dyeing was continued for 1 hour at that temperature. Thereafter, the cotton taken out was washed with water, soaped, washed with water and then dried to obtain each dyed product of a navy blue color superior in fastness properties with a superior build-up property. Example 7 Using each bisazo compound described in Examples 1 to 5, each color paste having the following composition was prepared. Bisazo compound 5 Parts Urea 5 Parts Sodium alginate (5%) stock paste 50 Parts Hot water 25 Parts Sodium hydrogencarbonate 2 Parts Water (balance) 13 Parts Mercerized cotton broad cloth was printed with the color paste of the above composition, pre-dried, steamed at 100°C for 5 minutes, washed with hot water, soaped, again washed with hot water, and then dried to obtain a product printed in a navy blue color superior in various fastness properties. Example 8 In a usual manner, 2-naphthylamine-6-β-sulfatoethylsulfone-1-sulfonic acid (20.5 parts) was diazotized and then coupled with 5-methyl-2-methoxyaniline (6.85 parts) to obtain a monoazo compound. On the other hand, 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid (16.0 parts) and cyanuric chloride (9.25 parts) were allowed to react with each other, followed by successive condensation reaction with aniline (4.7 parts). The condensate obtained was coupled with a diazonium compound of the above monoazo compound in a usual manner, followed by substituted reaction with 3-carboxypyridine (6.2 parts). The reaction mixture was after-treated in usual manners including salting-out using sodium chloride to obtain a bisazo compound represented by the following formula in the free acid form. Example 9 Example 8 was repeated, provided that 2-aminonaphthalene-6-β-sulfatoethylsulfone-1-sulfonic acid, 5-methyl-2-methoxyaniline, 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid, aniline and 3-carboxypyridine were replaced by those shown in columns 2 to 6 of the following table, respectively, thereby obtaining a corresponding bisazo compound. The bisazo compound obtained was used for dyeing cellulose fibers to obtain a product dyed in a color shown in a column 7 of the table. Example 10 In a usual manner, 2-naphthylamine-6-β-sulfatoethylsulfone-1-sulfonic acid (20.5 parts) was diazotized and then coupled with 5-methyl-2-methoxyaniline (6.85 parts) to obtain a monoazo compound. On the other hand, 1-aminobenzene-2,4-disulfonic acid (13.8 parts) and cyanuric chloride (9.25 parts) were allowed to react with each other, followed by successive condensation reaction with 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid (16.0 parts). The condensate obtained was coupled with a diazonium compound of the above monoazo compound in a usual manner. The resulting intermediate bisazo compound was then subjected to substitution reaction with 3-carboxypyridine (6.2 parts). The reaction mixture was after-treated in usual manners including salting-out using sodium chloride to obtain a bisazo compound represented by the following formula in the free acid form. Example 11 Example 10 was repeated, provided that 2-aminonaphthalene-6-β-sulfatoethylsulfone-1-sulfonic acid, 5-methyl-2-methoxyaniline 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid, 1-aminobenzene-2,4-disulfonic acid and 3-carboxypyridine were replaced by those shown in columns 2 to 6 of the following table, respectively, thereby obtaining a corresponding bisazo compound. The bisazo compound obtained was used for dyeing cellulose fibers to obtain a product dyed in a color shown in the table. Example 12 In a usual manner, 2-naphthylamine-6-β-hydroxyethylsulfone-1-sulfonic acid (33.1 parts) was diazotized and then coupled with sodium aniline-ω-methanesulfonate (20.9 parts), and the coupling reaction mixture was made alkaline to perform hydrolysis. The reaction mixture was neutralized and after-treated in usual manners including salting-out using sodium chloride to obtain a monoazo compound of the following formula in the free acid form. A mixture of the monoazo compound obtained (43.5 parts) and 20% oleum (80 parts by volume) was stirred at 60°C to perform sulfonation. The reaction mixture was poured into ice water (400 parts) to deposit crystals, which were then collected on a suction filter to obtain a sulfonated monoazo compound of the following formula in the free acid form. On the other hand, 6-amino-1-hydroxynaphthalene-3-sulfonic acid (23.9 parts) and cyanuric chloride (18.4 parts) were allowed to react with each other, followed by successive condensation reaction with N-ethylaniline (12.0 parts). The resulting condensate was coupled with a diazonium salt of the above sulfonated monoazo compound, and then allowed to react with 3-carboxypyridine (12.3 parts). The reaction mixture was after-treated in usual manners including salting-out using sodium chloride to obtain a bisazo compound of the following formula in the free acid form. Example 13 Example 12 was repeated, provided that the 2-naphthylamine-6-β-hydroxyethylsulfone-1-sulfonic acid, sodium aniline-ω-methanesulfonate, 6-amino-1-hydroxynaphthalene-3-sulfonic acid, N-ethylaniline and 3-carboxypyridine were replaced by those shown in columns 2 to 6 of the following table, respectively, and the hydrolysis was omitted, when the compound shown in the column 3 of the table was not an ω-methanesulfonic acid compound. Thus, a corresponding bisazo compound was obtained, and used for dyeing cellulose fibers to obtain a product dyed in a color shown in a column 7 of the table. Example 14 Each bisazo compound described in Examples 8 to 13 (each 0.1, 0.3 and 0.6 part) was dissolved in water (200 parts), and sodium sulfate (10 parts) and cotton (10 parts) were added thereto. The bath was heated to 60°C, and then sodium carbonate (4 parts) was added thereto. Dyeing was continued for 1 hour at that temperature. Thereafter, the cotton taken out was washed with water, soaped, washed with water and then dried to obtain each dyed product of a blue color superior in fastness properties with a superior build-up property. Example 15 Using each bisazo compound described in Examples 8 to 13, each color paste having the following composition was prepared. Bisazo compound 5 Parts Urea 5 Parts Sodium alginate (5%) stock paste 50 Parts Hot water 25 Parts Sodium hydrogencarbonate 2 Parts Water (balance) 13 Parts Mercerized cotton broad cloth was printed with the color paste of the above composition, pre-dried, steamed at 100°C for 5 minutes, washed with hot water, soaped, again washed with hot water, and then dried to obtain a product printed in a blue color superior in various fastness properties. Example 16 In a usual manner, 2-aminonaphthalene-8-β-sulfatoethylsulfone-6-sulfonic acid (41.1 parts) was diazotized and then coupled with 1-aminonaphthalene-7-sulfonic acid (22.3 parts) to obtain a monoazo compound, and the monoazo compound obtained was diazotized and coupled with m-toluidine (10.7 parts). The intermediate bisazo compound obtained and cyanuric chloride (18.4 parts) were allowed to react with each other, followed by successive condensation reaction with aniline (9.3 parts). The condensate obtained was then subjected to reaction with 3-carboxypyridine (12.3 parts), and the reaction mixture was after-treated in usual manners including salting-out using sodium chloride to obtain a bisazo compound represented by the following formula in the free acid form. Example 17 Example 16 was repeated, provided that the 2-aminonaphthalene-8-β-sulfatoethylsulfone-6-sulfonic acid, 1-aminonaphthalene-7-sulfonic acid, m-toluidine, aniline and 3-carboxypyridine were replaced by those shown in columns 2 to 6 of the following table, respectively, thereby obtaining a corresponding bisazo compound. The bisazo compound obtained was used for dyeing cellulose fibers to obtain a product dyed in a color shown in a column 7 of the table. Example 18 In a usual manner, 2-aminonaphthalene-8-β-sulfatoethylsulfone-6-sulfonic acid (41.1 parts) was diazotized and then coupled with 1-aminonaphthalene-7-sulfonic acid (22.3 parts), and the monoazo compound obtained was diazotized and coupled with 2,5-xylidine (12.1 parts) to obtain an intermediate bisazo compound. On the other hand, cyanuric chloride (18.4 parts) and 1-aminobenzene-2,5-disulfonic acid (25.3 parts) were allowed to react with each other. The resulting condensate was subjected to condensation reaction with the above intermediate bisazo compound, followed by reaction with 3-carboxypyridine (12.3 parts). The reaction mixture was after-treated in conventional manners including salting-out using sodium chloride to obtain a bisazo compound represented by the following formula in the free acid form. Example 19 Example 18 was repeated, provided that the 2-aminonaphthalene-8-β-sulfatoethylsulfone-6-sulfonic acid, 1-aminonaphthalene-7-sulfonic acid, 2,5-xylidine, 1-aminobenzene-2,5-disulfonic acid and 3-carboxypyridine were replaced by those shown in columns 2 to 6 of the following table, respectively, thereby obtaining a corresponding bisazo compound. The bisazo compound obtained was used for dyeing cellulose fibers to obtain a product dyed in a color shown in a column 7 of the table. Example 20 Examples 17 and 19 were repeated, provided that the compound shown in the column 5 of both tables was replaced by those described below, thereby obtaining a corresponding bisazo compound. 2-, 3- or 4-sulfophenol 2,5- or 2,4-disulfophenol benzylamine 2-, 3- or 4-sulfobenzylamine taurine N-methyltaurine β-alanine mono- or di-ethanolamine Example 21 Each bisazo compound described in Examples 16 to 20 (each 0.1, 0.3 and 0.6 part) was dissolved in water (200 parts), and sodium sulfate (10 parts) and cotton (10 parts) were added thereto. The bath was heated to 60°C, and then sodium carbonate (4 parts) was added thereto. Dyeing was continued for 1 hour at that temperature. Thereafter, the cotton taken out was washed with water, soaped, washed with water and then dried to obtain each dyed product of a yellow to brown color superior in fastness properties with a superior build-up property. Example 22 Using each bisazo compound described in Examples 16 to 20, each color paste having the following composition was prepared. Bisazo compound 5 Parts Urea 5 Parts Sodium alginate (5%) stock paste 50 Parts Hot water 25 Parts Sodium hydrogencarbonate 2 Parts Water (balance) 13 Parts Mercerized cotton board cloth was printed with the color paste of the above composition, pre-dried, steamed at 100°C for 5 minutes, washed with hot water, soaped, again washed with hot water, and then dried to obtain a product printed in a yellow to brown color superior in various fastness properties. Example 23 In a usual manner, 2 napthylamine-6-β-sulfatoethylsulfone-1-sulfonic acid (20.5 parts) was diazotized and coupled with 5-methyl-2-methoxyaniline (6.85 parts), and the resulting monoazo compound was diazotized and coupled with 5-methyl-2-ethoxyaniline (7.55 parts) to obtain a bisazo compound. On the other hand, 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid (16.0 parts) and cyanuric chloride (9.25 parts) were allowed to react with each other, followed by successive condensation reaction with 1-aminobenzene-3-β-sulfatoethylsulfone (14.2 parts). The resulting condensate was coupled with a diazonium compound of the above bisazo compound in a usual manner, followed by reaction with 3-carboxypyridine (6.2 parts). The reaction mixture was after-treated in usual manners including salting-out using sodium chloride to obtain a triazo compound represented by the following formula in the free acid form. Example 24 Example 23 was repeated, provided that 2-naphthylamine-6-β-sulfatoethylsulfone-1-sulfonic acid, 5-methyl-2-methoxyaniline, 5-methyl-2-ethoxyaniline, 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid, 1-aminobenzene-3-β-sulfatoethylsulfone and 3-carboxypyridine were replaced by those shown in columns 2 to 7 of the following table, respectively, thereby obtaining a corresponding trisazo compound. The trisazo compound obtained was used for dyeing cellulose fibers to obtain a product dyed in a color shown in a column 8 of the table. Example 25 Each trisazo compound described in Examples 23 and 24 (each 0.1, 0.3 and 0.6 part) was dissolved in water (200 parts), and sodium sulfate (10 parts) and cotton (10 parts) were added thereto. The bath was heated to 60°C, and then sodium carbonate (4 parts) was added thereto. Dyeing was continued for 1 hour at that temperature. Thereafter, the cotton taken out was washed with water, soaped, washed with water and then dried to obtain each dyed product of a navy blue color superior in fastness properties with a superior build-up property. Example 26 Using each trisazo compound described in Examples 23 and 24, each color paste having the following composition was prepared. Trisazo compound 5 Parts Urea 5 Parts Sodium alginate (5%) stock paste 50 Parts Hot water 25 Parts Sodium hydrogencarbonate 2 Parts Water (balance) 13 Parts Mercerized cotton broad cloth was printed with the color paste of the above composition, pre-dried, steamed at 100°C for 5 minutes, washed with hot water, soaped, again washed with hot water, and then dried to obtain a product printed in a navy blue color superior in various fastness properties.

Claims: A polyazo compound of the following formula, wherein X is -NR₂R₃, -OR₄ or -SR₅, in which R₁ is hydrogen or unsubstituted or substituted alkyl, R₂, R₃, R₄ and R₅ independently of one another are each hydrogen, unsubstituted or substituted alkyl, unsubstituted or substituted phenyl, unsubstituted or substituted naphthyl or unsubstituted or substituted benzyl, A is unsubstituted or substituted phenylene, unsubstituted or substituted naphthylene or unsubstituted or substituted alkylene, and Z is -SO₂CH=CH₂ or -SO₂CH₂CH₂Z′ in which Z′ is a group capable of being split by the action of an alkali, Y is unsubstituted or substituted pyridinio, and F is a polyazo dye moiety selected from the group consisting of those represented by the following formulas (1), (2), (3) and (4) each in free acid form, the formula (1) being wherein B is in which the asterisked linkage binds to the azo group, and R₇ is hydrogen, methyl, methoxy or sulfo, D is naphthylene unsubstituted or substituted by sulfo or sulfophenylene, R₆ is hydrogen or unsubstituted or substituted alkyl, any one of X₁ and X₂ is -NH₂ and the other is -OH, and Z₁ is -SO₂CH=CH₂ or -SO₂CH₂CH₂Z₁′ in which Z′₁ is a group capable of being split by the action of an alkali, the formula (2) being wherein Z₁ is as defined above, R₈ is hydrogen or unsubstituted or substituted alkyl, B₁ is in which the linkage marked with ** binds to the group -N=N-D₁, R₉ is hydrogen, alkyl, alkoxy or sulfo, and R₁₀ is hydrogen, halogen, alkyl, alkoxy, alkylsulfonylamino, acylamino or ureido, and D₁ is unsubstituted or substituted phenylene or unsubstituted or substituted naphthylene, the formula (3) being wherein B₁, D₁ and Z₁ are as defined above, R₁₁ is hydrogen or unsubstituted or substituted alkyl, E is in which the linkage marked with *** binds to the group R₁₂ is hydrogen, alkyl, alkoxy or sulfo, and R₁₃ is hydrogen, halogen, alkyl, alkoxy, alkylsulfonylamino, acylamino or ureido, and the formula (4) being wherein B₁, D₁ and Z₁ are as defined above, and E is as defined above, provided that the linkage marked with *** binds to the azo group of R₁₄ is hydrogen or unsubstituted or substituted alkyl, and ℓ is 1 or 2. The polyazo compound according to Claim 1, wherein the polyazo dye moiety is represented by the formula (1) as defined in Claim 1. The polyazo compound according to Claim 2, wherein D is naphthylene unsubstituted or substituted by sulfo, R₆ is hydrogen, and B is in which the asterisked linkage and R₇ are as defined in Claim 1. The polyazo compound according to Claim 2, wherein the polyazo dye moiety is represented by the following formula in the free acid form, wherein R₇, X₁, X₂, and Z₁ are as defined in Claim 1. The polyazo compound according to Claim 1, wherein the polyazo dye moiety is represented by the formula (2) as defined in Claim 1. The polyazo compound according to Claim 5, wherein B₁ is in which the linkage marked with ** is as defined in Claim 1, R₉ is hydrogen, C₁-C₄ alkyl, C₁-C₄ alkoxy or sulfo, and R₁₀ is hydrogen, chloro, C₁-C₄ alkyl, C₁-C₄ alkoxy, ureido, C₁-C₄ acylamino or C₁-C₄ alkylsulfonylamino. The polyazo compound according to Claim 1, wherein the polyazo dye moiety is represented by the formula (3) as defined in Claim 1. The polyazo compound according to Claim 7, wherein B₁ is in which the linkage marked with ** is as defined in Claim 1, R₉ is hydrogen, C₁-C₄ alkyl, C₁-C₄ alkoxy or sulfo, and R₁₀ is hydrogen, chloro, C₁-C₄ alkyl, C₁-C₄ alkoxy, ureido, C₁-C₄ acylamino or C₁-C₄ alkylsulfonylamino. The polyazo compound according to Claim 7, wherein E is in which the linkage marked with *** is as defined in Claim 1, R₁₂ is hydrogen, C₁-C₄ alkyl, C₁-C₄ alkoxy or sulfo, and R₁₃ is hydrogen, chloro, C₁-C₄ alkyl, C₁-C₄ alkoxy, ureido, C₁-C₄ acylamino or C₁-C₄ alkylsulfonylamino. The polyazo compound according to Claim 1, wherein the polyazo dye moiety is represented by the formula (4) as defined in Claim 1. The polyazo compound according to Claim 10, wherein B₁ is in which the linkage marked with ** is as defined in Claim 1, R₉ is hydrogen, C₁-C₄ alkyl, C₁-C₄ alkoxy or sulfo, and R₁₀ is hydrogen, chloro, C₁-C₄ alkyl, C₁-C₄ alkoxy, ureido, C₁-C₄ acylamino or C₁-C₄ alkylsulfonylamino. The polyazo compound according to Claim 10, wherein E is in which the linkage marked with *** is as defined in Claim 1, R₁₂ is hydrogen, C₁-C₄ alkyl, C₁-C₄ alkoxy or sulfo, and R₁₃ is hydrogen, chloro, C₁-C₄ alkyl, C₁-C₄ alkoxy, ureido, C₁-C₄ acylamino or C₁-C₄ alkylsulfonylamino. The polyazo compound according to Claim 1, wherein Y is 3- or 4-carboxypyridinio or 3- or 4-carbamoylpyridinio. The polyazo compound according to Claim 1, wherein X is in which R₁ is hydrogen, methyl or ethyl, and A is phenylene unsubstituted or substituted once or twice by methyl, ethyl, methoxy, ethoxy, chloro, bromo or sulfo, or naphthylene unsubstituted or substituted by sulfo, or -CH₂CH₂-, or -CH₂CHOCH₂CH₂-. The polyazo compound according to Claim 1, wherein X is -NR₂R₃ in which R₂ and R₃ independently of one another are each hydrogen, unsubstituted or substituted alkyl or unsubstituted or substituted phenyl. The polyazo compound according to Claim 1, wherein X is -OR₄ in which R₄ is unsubstituted or substituted alkyl, or unsubstituted or substituted phenyl. A process for producing the polyazo compound according to any one of Claims 1 to 16, which comprises reacting a dye compound of the formula (II), F - H (II) wherein F is as defined in Claim 1, and any one of compounds represented by the following formulas (III) to (VI), HNR₂R₃ (IV) HOR₄ (V) HSR₅ (VI) wherein A, Z, R₁, R₂, R₃, R₄ and R₅ are as defined in Claim 1, with a 2,4,6-trihalogeno-s-triazine to obtain a monohalogenotriazine compound of the following formula (VII), wherein F and X are as defined in Claim 1, and T is halogen, and reacting the monohalogenotriazine compound of the formula (VII) with a pyridine compound. A process for dyeing or printing fiber materials, which comprises using the polyazo compound according to any one of Claims 1 to 16. Use of the polyazo compound according to any one of Claims 1 to 16 as a fiber-reactive dye.

Inventors: AKAHORI KINGO, HARADA NAOKI, KAYANE YUTAKA, MIYAMOTO TETSUYA, OMURA TAKASHI, WASHIMI TAKESHI, YOKOGAWA KAZUFUMI, AKAHORI, KINGO, HARADA, NAOKI, KAYANE, YUTAKA, MIYAMOTO, TETSUYA, OMURA, TAKASHI, WASHIMI, TAKESHI, YOKOGAWA, KAZUFUMI
Applicants: SUMITOMO CHEMICAL CO, SUMITOMO CHEMICAL COMPANY, LIMITED
Application year: 1990
Main classification: C09B62
IPC codes: C09B62