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One‐bath dyeing of polyester/cotton blends with disperse and bis‐3‐carboxypyridinium‐ s ‐triazine reactive dyes. Part 2: Application of substantive reactive dyes to cotton at 130 °C and neutral pH †
Author(s) -
Bone J A,
Le T T,
Phillips D A S,
Taylor J A
Publication year - 2008
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/j.1478-4408.2008.00131.x
Subject(s) - dyeing , triazine , polyester , reactive dye , yield (engineering) , chromophore , chemistry , reactive intermediate , polymer chemistry , organic chemistry , materials science , composite material , catalysis
An earlier paper reported that the reactive dyes (not the disperse dyes) were responsible for the inability to achieve heavy depths of shade, when dyeing polyester/cotton blends by a one‐bath process at 130 °C and neutral pH using reactive dyes containing a 3‐carboxypyridinium‐ s ‐triazinyl group. It was shown that the poor colour yield of the bis‐3‐carboxypyridinium‐ s ‐triazine reactive dyes was because of their low exhaustion level at 130 °C and pH of 7.0–7.5. We now report the synthesis and evaluation of some bis‐3‐carboxypyridinium‐ s ‐triazine reactive dye structures, possessing highly substantive chromophores, as a means of obtaining high colour yield, on 100% unmercerised cotton, under the specified dyeing conditions. The technical performance of these dyes under such conditions was compared with that of selected Novacron (Cibacron) LS and Procion H‐E dyes, applied under their recommended (atmospheric) dyeing conditions.