Process for dyeing or printing cellulose fibers or cellulose blend fibers with pyridinium-triazine reactive dye, axable without alkali
AssigneeHoechst Aktiengesellschaft
InventorsFritz Meininger, Peter Mischke, Gerd Konig, Hartmut Springer
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Abstract
Process for dyeing cellulose fibers or cellulose blend fibers, which comprises dyeing the fibers mentioned with water-soluble reactive dyes which contain in the dye molecule at least once the structural element of the formula ##STR1## in which Y denotes a hydroxyl, hydroxymethyl, alkoxy C.sub.1 -C.sub.4, aldehyde, carboxamide, monoalkyl C.sub.1 -C.sub.4 -carboxamide, dialkyl C.sub.1 -C.sub.4 -carboxamide, monophenyl carboxamide, cyano, alkyl C.sub.1 -C.sub.4 -oxycarbonyl or sulfo group or a halogen atom, in an aqueous medium within the pH range 4-11.
Claims18
A process for dyeing cellulose fibers of cellulose blend fibers, which comprises dyeing the fibers mentioned with water-soluble reactive dyes which contain in the dye molecule, as the only fiber-reactive group or groups in the dye molecule, at least once the structural element of the formula ##STR58## in which Y denotes a hydroxyl, hydroxymethyl, alkoxy C.sub.1 -C.sub.4, aldehyde, carboxamide, monoalkyl C.sub.1 -C.sub.4 -carboxamide, dialkyl C.sub.1 -C.sub.4 -carboxamide, monophenyl carboxamide, cyano, alkyl C.sub.1 -C.sub.4 -oxycarbonyl or sulfo group or a halogen atom, in an aqueus medium within the pH range 4-11.
A process for dyeing cellulose fibers or cellulose blend fibers, which comprises dyeing the said fibers with water soluble fiber-reactive dyes dissolved in an aqueous dyeing medium having a pH within the range of 4 to 11, the dye molecules of said fiber-reactive dyes having at least one fiber-reactive group, each said fiber-reactive group being only a triazinyl-substituted pyridinium structural element of the formula ##STR61## in which Y denotes a substituent of said structural element which enables the structural element to provide a dye fixation optimum under generally neutral conditions, Y being (a) sulfo or (b) hydroxyl, hydroxymethyl, C.sub.1 -C.sub.4 alkoxy, aldehyde, carboxamide or carboxamide substituted by one or two C.sub.1 -C.sub.4 alkyl groups or one phenyl group, cyano, a halogen atom, or alkyl C.sub.1 -C.sub.4 oxycarbonyl.
Dependencies are inferred from the claim text.