Brilliant blue azo dye and method of preparation thereof and its use

摘要

The present invention discloses a brilliant blue azo dye and its manufacturing method and application. As shown in structural formula (I), the present invention discloses an application of a brilliant blue azo dye in dyeing or printing of polyester fibers. A dispersion dye composition is prepared by mixing the brilliant blue azo dye with at least one compound selected from structural formula (I), wherein the dispersion dye composition can be applied to dyeing or printing of polyester fibers. The present invention is excellent in both fastness to wash, friction fastness, sweat fastness, light fastness to tomorrow, and dyeing rate when dyeing is progressed. The color is stable with wash fastness, does not fade easily, and the cost is relatively low.