Dyeing Nylon Films with Acid Dyes Modified with Various Normal Alkylamines

Abstract

The fundamental data required to establish the technique of dyeing nylon and wool fibers in a water/perchloroethylene dye bath were gathered. A sodium atom of CI acid blue 62 was substituted by a series of normal alkylamine and hydrogen atoms in order to obtain complex dyes that are soluble in perchloroethylene. These dyes, which have 6, 9, and 12 carbon chain lengths, have good solubility in both water and perchloroethylene. This can be attributed to the fact that these dyes are dissolved in a dissociated state in water and in an undissociated state in perchloroethylene. The saturated amounts of these complex dyes on nylon 6 films dyed in each bath were greater than those of the original dye. There were differences between shades of nylon 6 films dyed in water and in perchloroethylene, and these seem to be attributable to the different degrees of aggregation of the complex dyes.