Azo dispersion dye prodn. from substd. pyridine coupling cpds. - for use on cellulosic-textiles

摘要

Dye prepns. contain new azo dispersion dyes of formula (I). In (I), D is the gp. of a diazo component; Z1 and Z2 are gps. of formula NR1R2; Z3 is H, 1-7C alkyl or NR1R2; one of Z1 to Z3 is OR3; X is SO2R4 or CO2NR1R2; R1 to R4 are aliphatic, cycloaliphatic, araliphatic or aromatic gps.; R1 to R3 may also be H, and NR1R2 may be a satd. heterocyclic gp. Used for dyeing or printing of cellulose or cellulose-contg. textiles. Excellent fastness esp. to wet treatments and light is obtd., with no bleeding into white grounds of prints during washing.