Dispersion of Disperse Yellow BROB with Polymer Surfactants and Its Dyeing Property for Polyester Fabric

Disperse Yellow BROB is an important kind of yellow disperse dyes, being stable under the alkaline condition. Two new dispersion systems of Disperse Yellow BROB, nonionic/anionic and anionic/anionic polymer surfactants, were investigated by particle size analysis and Field Emission Scanning Electron Microscopy (FESEM). Amino-terminated polyether (nonionic surfactant L64), and sulfonated amino polyether (anionic surfactant B600), as assisting dispersing agent were applied to grind the dye powder, respectively. Crystal morphological structure of Disperse Yellow BROB was observed by FESEM. Dyeing property of the ground disperse dye under the alkaline condition was discussed. The results show that Disperse Yellow BROB formed stellate crystal in N,N-dimethyl formamide (DMF). Two new dispersion systems of the dye had excellent dispersibility and well-distributed particle sizes. The dispersed particle size with anionic/anionic surfactant was finer than that with nonionic/anionic surfactant. Compared with the traditional sodium salt of polycondensated naphthalenesulphonic acid (dispersing agent MF) dispersion system, the dyeing rate of two new dispersion systems under alkaline condition obviously increased. Nonionic/anionic and anionic/anionic surfactant dispersion systems of Disperse Yellow BROB were stable. The excellent dispersion system of disperse dyes could improve the dyeing property of poly(ethylene terephthalate) (PET) fabric.