| abstract |
Water-soluble perylene dyestuffs, their preparation and their use n The present Application relates to water-soluble perylene dyestuffs of the formula ##STR1## in which R 1 and R 2 independently of one another are the radicals A--X--COOM or A--X--SO 3 M; n R 3 and R 4 independently of one another are the radicals R 1 or R 2 , or are OR 5 or NR 6 R 7 ; n A is NR 8 or S; n X is a straight-chain or branched alkylene radical, a straight-chain or branched alkylene radical which is substituted by hydroxyl, carboxyl or amino, an arylene radical or an arylene radical which is optionally substituted by hydroxyl, carboxyl or sulfo; n R 5 , R 6 and R 7 independently of one another are hydrogen, (C 1 -C 4 )-alkyl or (C 1 -C 4 )-alkyl which is substitituted by one or more hydroxyl, 2-hydroxyethoxy, (C 1 -C 4 )-alkoxy or amino groups; n R 8 is hydrogen, methyl or ethyl and n M is a monovalent cation or one equivalent of a polyvalent cation, n processes for their preparation, their use for dyeing and printing naturally occurring and synthetic fiber materials, and recording liquids, in particular for the ink-jet process, and liquid formulations for dyeing paper in the pulp which comprise the dyestuffs according to the invention. |