Sm. Burkinshaw et al., The application of heterobifunctional reactive dyes to nylon 6,6: process modifications to achieve high efficiencies, DYE PIGMENT, 48(3), 2001, pp. 245-251
A heterobifunctional monochlorotriazine/vinyl sulphone (MCT/VS) reactive dy
e was applied to nylon 6,6 using various pH and temperature conditions. Opt
imum dye exhaustion and fixation were achieved at pH 4 and 98 degreesC. The
form in which the VS moiety was present during dyeing was examined by capi
llary electrophoresis. Preconversion of the dye to its VS form gave improve
d fixation and modified dyeing methods in which alkali additions were made
at various points during the dyeing were used to achieve high dye fixation.
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