Process for the dyeing or printing of polyester fibers

Abstract From the Canadian patent

In the process for the pad-dyeing of printing of materials consisting of, or containing, polyester or polyamide fibers of filaments, whereat in known manner the said materials are padded or printed with an aqueous liquor or printing paste of disperse dyestuffs, and subsequently the dyestuffs are fixed by means of liquid or gaseous methylene chloride or of both of the said phases of methylenechloride the improvement that a dyestuff of the formula in which R1 represents hydrogen, chlorine bromine or, cyano, R2 represents hydrogen chlorine of alkyl of 1, to 3 carbon atoms and R3 stands for alkyl of 1 to 5 carbon atoms, -C2H4-OH or alkylene, is applied.