Effectsof additives on the dyeing of nylon-6 with dyes containing hydrophobic and hydrophilic moieties

摘要

A series of azo disperse dyes with variable hydrophobic chain length and hydrophilic (hydroxy or glucosyl group) head were synrthesised. ~1H and ~13C NMR spectra indicated that the glucosyl moiety was linked ot the azo structure with a #beta# anomeric bond. The dyeing properties on polyamide fibres were assessed with dyeing isotherms and Linitest experiments. The positive effects of additives, as ternary systems (SDS, Brij 35 and octanol) or cyclodextrins, on the dyeing uniformity were shown by btristimulus colorimety.