Abstract: The present invention provides a reactive dyestuff with an alkylthio group and a ?-sulfatoethylsulfone group, which is represented by formula (I), wherein D, R, R1, R2, R3, R4, Q, x, and y are defined the same as the specification. The reactive dyestuffs of the present invention not only have characteristics of high solubility, high alkali solubility, and easily being washed off for dyeing cellulose fiber, but also are suitably applied in cold-pad-batch dyeing, continuous-dyeing, printing, and digital printing.

Abstract: A water-soluble reactive dye of the formula:D.sup.1 --Z.sup.1 --NR.sup.1 --T--NR.sup.2 --Z.sup.2 --D.sup.2 (1)whereineach of D.sup.1 and D.sup.2, independently, represents the radical of a water-soluble chromophoric compound,each of Z.sup.1 and Z.sup.2, independently, represents a triazine or pyrimidine residue carrying an atom or group imparting fibre-reactivity to the dye,R.sup.1 represents an optionally substituted alkyl radical,R.sup.2 represents hydrogen or an optionally substituted alkyl radical, andT represents a 1,3- or 1,4-phenylene radical which may carry one or more substituents selected from halogen, alkyl, alkoxy, acylamino, nitro and carboxy.

Abstract: A dyestuff of the formula ##STR1## where D is a chromophoric residuen is 1 or 2Z is ##STR2## where R is H, C.sub.1-4 alkyl, C.sub.1-4 alkyl substituted by OH, OSO.sub.3 H, CN or SO.sub.3 H or is phenyleach hal independently represents a chlorine or fluorine atom occupying one of the remaining 2-, 4- and 6-positions of the pyridine nucleusX is F, Cl, CN or NO.sub.2Y is H, F, Cl, CN or NO.sub.2.These dyestuffs reactively dye cellulose at low temperatures and are less prone to "acid bleeding" than some known reactive dyes.

Abstract: Dyeing nylon by applying sulphonated or unsulphonated dyestuffs containing cyclic anhydride groups, anhydride forming dicarboxylic acid groups or half-esters or half-amides thereof, as free acids or as salts with ammonia or volatile amines, and heating the fibre until dyestuff fixation takes place.