Water-soluble reactive mono and disazo dyestuffs and processes for their manufacture

摘要

Water-soluble mono- and diazo dyes of general formula in which R is radical of a water-soluble monoor or disazo dyestuff directly linked through an aromatic nucleus to the N atom, R1 and R11 are hydrogen atoms or substituted or unsubstituted substituted alkyl radicals having 1-4 carbon atoms or aralkyl radicals, R111 is a substituted or unsubstituted alkyl radical having 1-4 carbon atoms or an aralkyl radical, X is a group -SO2-, -CO- or -CO-NH-, Y is a substituent, Z is an inorganic or organic radical which can be split off by alkali to give a vinylsulphonylamino group, n is 0, 1 or 2, and m is an integer 1-3, are prepared by reacting a mono or disazo dyestuff of formula with a compound of formulaeae in which X1 is a carboxylic acid halide group, a sulphonic acid halide group or an isocyanate group other symbols being as above, the reaction being carried out in a weakly acid, neutral or weakly alkaline medium at pH values of 3-8 preferably at 0-40 DEG C. The dyes give red-yellow shades in cellulosic materials.ALSO:Cellulosic materials are dyed by conventional methods with reactive dyes of formulae in which R is a radical of a water-soluble mono- or dioazo dye directly linked through an aromatic nucleus to the N atom, R1 and R11 are hydrogen atoms or substituted or unsubstituted alkyl radicals having 1-4 carbon atoms or aralkyl radicals, R111 is a substituted or unsubstituted alkyl radical of 1-4 carbon atoms or an aralkyl radical, X is a group -SO2-, -CO-, or -CO-NH-, Y is a substituent, 2 is an inorganic or organic radical which can be split off in alkali to give a vinylsulphonylamino group, n is 4, 1 or 2, and m is an integer 1-3, the dyes give red-yellow shades.