Abstract
As the absorption spectrum of a mixture of Orange II (C. I. Acid Orange 7) and Alizarine Saphirol SE (C. I. Acid Blue 43) in aqueous solution at room temperature is not the same as the sum of its constituents, the complexes of Orange II and Alizarine Saphirol are supposed to be formed in solution. But the additivities are found in the absorption spectra of a mixture of Metanii Yellow (C. I. Acid Yellow 36) and Alizarine Saphirol, and of a mixture of Metanil Yellow and Orange II.
The acid dyes are found to form complexes with polyethylene glycol cetyl ether which contains 20 ethyleneoxy units in aqueous solution. The equilibrium constant of interaction of dye acid and with PEG-cetyl ether, and the values of degree of dissociation of complexes are determited spectrometrically.
In the dyeing of nylon-6 with single dye acid or a binary mixture of dye acids, the effects of PEG-ether on the adsorption of dye acids on nylon-6 are considered from the point of the stabilities of complexes of acid dyes and PEG-cetyl ether.
