| abstract |
Disclosed are a reactive disperse dye dedicated for water-free dyeing of a natural fiber in supercritical CO 2 fluid, and an intermediate thereof. A long alkane chain bridge group is comprised between a dye parent chromophore of the reactive disperse dye and an active group, the supply-absorption effect of an electron cloud of a conjugated system can be effectively promoted, the bathochromic effect is enhanced, the influences of the active group and a reaction thereof on a dye chromophore system are efficiently reduced, and the acid-alkali resistance stability of the dye color is improved. In addition, the compatibility between the dye and the supercritical fluid, and the dying performance on the natural fiber are also advantageously improved. Also disclosed are an intermediate of the reactive disperse dye, and a preparation method for the reactive disperse dye. |