WATER-SOLUBLE YELLOW AZO DYES

摘要

The invention relates to a dye of formula (2), where A and B together or independently = a C6-C10 aryl group, optionally substituted with 1, 2, 3 or 4 substituents from C1-C6 alkyl, hydroxy, C1-C6 alkoxy, carboxy, sulpho, sulphonamido, amino and C1-C6 alkylamino, or a 5- to 7-membered aromatic heterocycle which may be benzoannellated and can have 1, 2, 3 or 4 of the above substituents, or A = an azo dye group of formula (2a) D<1>-N=N-D<2>- (2a), where D1 and D2 together or independently = a C6-C10 aryl group, optionally substituted with 1, 2, 3 or 4 substituents from C1-C6 alkyl, hydroxy, C1-C6 alkoxy, carboxy, sulpho, sulphonamido, amino and C1-C6 alkylamino, Y = an oxygen- and/or nitrogen-containing group which optionally forms with X the enolate function of a 9- or 10-membered ring and X = hydrogen, a monovalent metal cation, an equivalent to a monovalent metal cation or an ammonium ion substituted with C1-C4 alkyl, phenyl or (C1-C4) alkoxy-(C1-C4) alkyl.