Abstract: The present invention relates to water insoluble disperse-reactive dyes expressed by the formula (3) and (4) and to their preparation, (3) (4) wherein each of Ar1 and Ar2 represents aryl or benzothiazole group, and each of R, R1, R2, and R3 independently represents hydrogen, alkyl, alkoxy, cyanoalkyl or aminoacetyl group.

Abstract: This invention relates to a reactive black dye containing acetoxyethyl sulfone compound and more particularly, to the reactive black dye containing acetoxyethyl sulfone compound of formula (1), which is characterized by lessening the loss of dyes in filtering process owing to the low solubility by introducing the aminophenyl-beta-acetoxyethyl sulfone moiety, saving the cost for waste water treatment by using a small amount of salt in salting-out process and furthermore obtaining bright color with high dyeing yield and good substantivity wherein M is an alkali metal atom, and wherein the compound of formula (1) is chosen from

Abstract: The present invention relates to a bifunctional red reactive dye and more particularly, to the bifunctional red reactive dye with monochlorotriazine and acetoxyethylsulfone as reactive groups expressed by formula (I), wherein, M is alkaline metal atom, which provides excellent combination of properties in that 1) the introduction of aminophenyl-&bgr;-acetoxyethylsulfone group to the dye may minimize the loss of dye, since its low solubility to water lessens the amount of the remaining solution during filtration, 2) an easier salting-out process requires a smaller amount of salt during the process so that the costs for the treatment of waste water may be significantly reduced, and 3) a better dyeing yield with enhanced substantivity and better brightness in color