Study of Desalination and Changing the Counter Ion of Mono-‎Chlorotriazinyl Reactive Dye on Dyeing Nylon 6.6 ‎

A nionic reactive dyes used to dye ‎nylon suffer from failures due to ‎the poor efficiency caused by low ‎degree of exhaustion and fixation. ‎From the previous work , the ‎dyeing efficiency of Procion ‎Rubine XL+ on modified nylon ‎was particularly week and hence ‎offers the widest scope for an in ‎depth investigation in to variables ‎that affect the dyeing process. In ‎this paper, a number of attempts ‎were made to improve the fixation ‎efficiency of Procion Rubine XL+ ‎on modified nylon. The process ‎variables were studied:(a) the ‎effect of desalination, as well as ‎‎(b) the effect of changing the ‎counter ion from sodium to ‎trimethyl ammonium. ‎Consequently, reducing the ‎electrolyte concentration and ‎changing the counter ion resulted ‎in reduced fixed color yield which ‎means in all cases fixation yields ‎generally inferior to those ‎obtained from the commercial ‎sample of Procion Rubine XL+. ‎