STUDY OF APPLICATION PROPERTIES OF NOVEL TRISAZO HETERO BI-FUNCTIONAL REACTIVE DYES BASED ON J-ACID DERIVATIVES FOR COTTON

摘要

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 l-hydroxy-6-aminonapthalene-3-sulphonic acid (J-acid), l-hydroxy-6-methylaminonapthalene-3-sulphonic acid (methyl J-acid), and l-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.