Abstract
The benzodifuranone blue disperse dyes could be synthesized from 5-hydroxy-2-oxo-3-phenyl-2,3-dihydrobenzofuran and di(4-aminophenyl)acetic acid derivatives. The dyeing rate, build-up, and wet-fastness of one benzodifuranone disperse dye, 3-phenyl-7-(4'-amino-3',5'-diethy Ipheny 1)-2,6-dioxo-2,6-dihydrobenzodifuran, were compared with commercially av ailable dyes such as C. 1. Disperse Elue 73 and C. 1. Disperse Blue 79, whose chromophores were an-thraquinone and azobenzene, respectively. It was found that the dyeing rate of the ben-zodifuranone disperse dye was slow and the amount of exhausted dye was low, but the wet-fast-ness was excellent. The most important reason for its unique dyeing properties and high wet-fast-ness might be the big planar region in the benzodifuranone chromogen.