INTERACTION BETWEEN AMINOANTHRAQUINONE DISPERSE DYES AND SODIUM β-NAPHTHALENE SULFONATE-FORMALDEHYDE CONDENSATES

Interaction between aminoanthraquinone disperse dyes and sodium β-naphthalene sulfonate-formaldehyde condensates in aqueous medium has been investigated with the continuous variation method in optical density and electroconductivity. Samples used were 1-amigo-, 1, 4-diamino- and 1, 4, 5, 8-tetraaminoanthraquinone, and two condensates whose degrees of condensation were 2_??_3 and 8_??_10, respectively. These disperse dyes interacted to form the 1:1 complexes with each naphthalene nucleus of the condensate independently of its degree of condensation. These experimental results suggest that this complex may be formed by van der Waals interaction between anthraquinone nucleus of the dye and naphthalene nucleus of the condensate.