| 摘要 |
Materials of aromatic polyesters and of cellulose acetates are dyed by heating them in an aqueous dispersion or suspension of a mixture of dyes consisting of at least one dye of the formula <FORM:1017863/D1-D2/1> wherein one of Y1 and Y2 is -OH and the other is -NO2, and at least one dye of the formula <FORM:1017863/D1-D2/2> wherein one of X1 and X2 is -H and the other is -CONH2 and Y1 and Y2 are as above. The dye mixtures may be in the form of dye preparations containing non-ionic or anionic surfactants as well as diluents, e.g. urea, starch or sugar. The ratio of the two dyes in the mixture may vary between 1 : 3 and 3 : 1, preferably 1 : 1. The dyeing of polyethylene terephthalate or cellulose triacetate fibres may be accomplished at 90-100 DEG C. sometimes in the presence of a carrier, or at 100-140 DEG C. under increased pressure; alternatively the goods may be padded and subsequently fixed at 180-250 DEG C. Cellulose-2 1/2 -acetate may be dyed at 60-90 DEG C. |
