A Kinetic Study on the Dissolution of two Naphthalimide Based ‎Synthesized Disperse Dyestuffs in the Presence of Dispersing Agents

The water solubility kinetics of two ‎synthesized mono azo ‎naphthalimide based disperse ‎dyestuffs in the presence of two ‎different dispersing agents, namely ‎Irgasol DAM and Lyoprint EV ‎were investigated at various ‎temperatures. An exponential ‎equation was found to describe the ‎dissolution process. Addition of ‎Irgasol DAM and Lyoprint EV ‎dispersing agents increased the ‎dissolution rate of both synthesized ‎dyestuffs. The dissolution of the ‎methyl naphthalimide derived ‎dyestuff in water as expected was ‎more than the ‎propylnaphthalimide derivative. ‎The dyeing depth and the leveling ‎properties were also higher for the ‎methyl derivative than the propyl ‎derivative‎