Study of application properties of novel trisazo hetero Bi-functional reactive dyes based on J-Acid derivatives for cotton

Abstract EN

Three novel trisazo hetero bi-functional reactive dyes based on J-acid derivatives were prepared using the diazonium salt of [4-(4-sulphophenylazo-)-2, 5-dimethylazobenzene-2-sulphonic acid] and a hetero bi-functional coupling component, derived from 1-hydroxy-6-aminonapthalene-3-sulphonic acid (J-acid), 1-hydroxy-6- methylaminonapthalene-3-sulphonic acid (methyl J-acid), and 1-hydroxy-6-aminonaphthalene-3, 5-disulphonic acid (sulpho J-acid).

On balance, the dye derived from sulpho J-acid displayed the most attractive set of technical properties, building up and fixing more efficiently than those derived from J-acid and methyl J-acid.

In addition, the sulpho J-acid based dye offered better migration and, therefore, level dyeing and ease of wash off.