Stability of Dye Dispersions in the Presence of Various Surface Active Agents and Additives

Disperse dyes are hardly soluble in water. They are usually milled in the presence of large amounts of dispersing agents in the dye industry. The type and amount of these materials can affect the disperse ability of dyes in aqueous media. In this article, stability of prepared dye dispersions in the presence of various surface active agents and additives were investigated. In this respect, various dispersing agents such as Irgasol DAM, Asutol 644, Dispertane MF, and Irgasol P800 were used to prepare dye dispersions in milling stage. Furthermore, the formulations of dye dispersions were obtained by adding β-cyclodextrin, urea, and wetting agent. The dye dispersion quality was determined by its filtering property, turbidity, and centrifuging method. The obtained results proved the stability of dispersion containing of Irgasol DAM, wetting agent, and β-cyclodextrin as dispersing auxiliaries in dyeing process of disperse dye on polyester fabrics in high temperature method was the highest as compared to other dispersions. From the experimental results, it was found out that stability of prepared dispersions was improved by the presence of β-cyclodextrin. Also, utilization of β-cyclodextrin in formulations of dye dispersions caused to increasing of stability of dispersion in the dyeing of polyester fabrics.