Process for the dyeing or printing of polyester fibers

Abstract From the Canadian patent

In the process for the pad-dyeing or printing of materials consisting of, or containing, polyester or polyamide fibers or filaments, in which process the materials are padded or printed in common manner with aqueous baths or printing pastes of disperse dyestuffs, and the dyestuffs are subsequently fixed by the action of liquid or gaseous methylene chloride or both of the said phases of methylene chloride the improvement that, dyestuffs of the general formula in which R is an alkoxy group of from 1 to 3 carbon atoms the group, or -O(CH2)n-alkoxyC1-C3', in which n stands for an integer of from 2 to 6 are used.