- High temperature process for preparing fiber reactive dyes
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A process for preparing monoazo dyes by coupling a aromatic diazonium salt with an amino-4-hydroxy-naphthalene sulfonic acid derivative at a temperature of 40°-85° C. The process of the invention provides a isomerically purer dye.
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- Reactive dye having both monochlorotriazinyl and vinylsulfone type reactive groups
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A novel reactive monoazo dye, capable of giving cellulose fiber materials a deep orange to scarlet color and superior in build-up and chlorine fastness properties, represented by a free acid of the formula, STR1 wherein R1 is hydrogen, methyl or ethyl; R2 is an alkyl having 1 to 4 carbons that is either unsubstituted or substituted with hydroxy, cyano, alkoxy, halogen, carboxy, alkoxycarbonyl or sulfonic acid; Z is hydrogen or sulfonic acid; A is phenylene and is either unsubstituted or substituted with 1 or 2 substituents selected from the group consisting of methyl, ethyl, methoxy, ethoxy, chlorine, bromine and sulfonic acid, or natphthylene that is either unsubstituted or substituted with sulfonic acid; X is --SO2 CH=CH2 or --SO2 CH2 CH2 Y in which Y is a group that is splittable by alkalis; and m is an integer of 1 to 3.
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- Fiber reactive monoazo compounds having two vinylsulfone type fiber reactive groups in the molecule
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A monoazo compound of the following formula in a free acid form, STR1 wherein A1 and A2 are phenylene or naphthylene, Z1 and Z2 are --SO2 CH=CH2 or --SO2 CH2 CH2 Y in which Y is a splittable group, R1 and R2 are hydrogen or alkyl, and D is sulfophenyl or sulfonaphthyl, provided that --A1 --Z1 and --A2 --Z2 are different from each other when D is sulfophenyl and both R1 and R2 are hydrogen, which is useful for dyeing or printing fiber materials to give dyed products of high fastness properties with extremely high color depth.
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- Bisazo brown reactive dye
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A brown reactive dye represented by a free acid of the formula, STR1 wherein R is a hydrogen atom or a C1 to C4 alkyl group, X is --SO2 CH2 CH2 Cl, --SO2 CH=CH2, --SO2 CH2 CH2 OSO3 H or --SO2 CH2 CH2 OPO3 H2, rings A, B and C are each a benzene or naphthalene ring which may have other substituent, m is 0 to 3 and n is 0 to 1. This dye is suitable for dyeing cellulose fibers brown to afford dyeings superior in fastnesses, acid stability, build-up property and level dyeing property.
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- Reactive yellow dye having both monochlorotriazinyl and vinylsulfone type reactive groups
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The compounds represented, in the form of free acid, by the following general formula (I): STR1 (wherein A is STR2 (wherein R3 and R4 are each hydrogen or a methyl, ethyl, methoxy, ethoxy, acetylamino, propionylamino, benzoylamino or ureido group, and R5 and R6 are each hydrogen or a methyl or methoxy group), R1 and R2 are each hydrogen or a methyl, ethyl or sulfomethyl group, X1 and X2 are each hydrogen, chlorine or a methyl, methoxy, carboxyl or sulfonic acid group, m is a number of 0, 1 or 2, and n is a number of 1 or 2, provided that the sum of m and n is 1, 2 or 3). These compounds are capable of dyeing cellulose fibers in yellow with excellent color fastness to hypochlorite, light, perspiration and sunlight and high acid stability.
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- Reactive red dye having both monochlorotriazinyl- and vinylsulfone-type reactive groups
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A dye represented by a free acid of the formula, STR1 wherein A is STR2 in which Z is --CH2 CH2 OSO3 H or --CH=CH2. This dye is usable for dyeing cellulose fibers in brilliant red color with good fastness, particularly, too chlorine, light and perspiration-light and possesses level dyeing properties.
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- Azo dyestuffs
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Azo dyestuffs, which in the acid form, are represented by the formula: wherein A is an aromatic radical, M is a 1,4-benzene radical which may be substituted, E is the residue of a coupling component which is free from azo groups, At least one of A and M containing a phosphonic acid group, and the metal complexes of those having a metallisable group are reactive dyes suitable for use in the process of German OLS No. 2324809.
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