The dyeing of conventional decitex and microfibre nylon 6,6 with reactive dyes .1. Chlorodifluoropyrimidinyl dyes

Conventional decitex and microfibre nylon 6,6 fabrics were dyed using three commercial chlorodifluoropyrimidinyl reactive dyes. Weakly acidic conditions (pH 4) were found to yield optimum colour yield and level dyeings were obtained without the need for electrolyte or a proprietary levelling agent. The three dyes displayed good build-up on both conventional decitex and microfibre nylon 6,6 fabrics; generally, dye build-zip was similar on both types of fabric at low depths of shade but was greater on conventional fabric at high depths of shade. The fastness of the washed-off dyeings to the ISO C06/C2 wash test, at each of seven depths of shade (0.1%, 0.5%, 1%, 2%, 3%, 4% and 5% omf), was very good. Treatment of the dyeings before wash-off with a commercial syntan reduced the amount of dye removed during wash-off but altered the colour of the dyeings. Generally, syntan treatment did not improve the wash fastness of the dyeings. Copyright (C) 1996 Elsevier Science Ltd