Abstract: A kind of new reactive disperse dye and its dyeing properties were researched. The bissulphatoethylsolphone reactive groups were introduced into the disperse dye and formed a new reactive disperse dye. The bis-sulphatoethylsolphone reactive groups could form covalent bond with wool and disperse dyes could be taken up to polyester. Maximum exhaustion values were observed at pH value 7 and 100℃. The dyes containing bis-sulphatoethylsolphone reactive groups had better dyeing properties compared with mono-sulphatoethylsulphone reactive group dyes. All dyed fabrics had good rub fastness,soaping fastness and perspiration fastness.

Key words: reactive disperse dyes; neutral condition; wool/polyester blend fabric; dye uptake