Blended black reactive dyes for rayon printing

Abstract

The invention discloses a mixed black reactive dye applicable to rayon printing. The mixed black reactive dye comprises a comprises a component A, a compound as shown in a formula (I) or salt of the compound, a component B, a compound as shown in a formula (II) or salt of the compound, a component C and a compound as shown in a formula (III) or salt of the compound. The invention further disclosesan application of the mixed black reactive dye to rayon printing and a rayon fabric printed by the mixed black reactive dye. By the aid of the mixing efficiency increasing principle of the componentA, the component B and the component C, the mixed black reactive dye has good directness, fixation rate, color fastness to wet rubbing and color fastness to perspiration, black degrees, leveling property, compatibility and the like can meet market requirements, and the mixed black reactive dye is quite applicable to the printing process of rayon fabrics.

Description

technical field [0001] This application relates to the field of reactive dyes. Specifically, the present application relates to a blended black reactive dye suitable for rayon printing. The present application also relates to the rayon textile fabric obtained by printing with the blended black reactive dye. Background technique [0002] In rayon textile printing, black reactive dyes account for almost half. Among the monomeric reactive dyes, the reactive black KN-B is cheap, and its fastness can barely meet the general requirements in all aspects, but it has insufficient blackness, directness, low color fixation rate, color fastness to wet rubbing and perspiration resistance. Therefore, in recent years, more and more attention has been paid to the research and development of new black reactive dyes with high blackness, high color fixation rate and high color fastness. [0003] In order to improve the blackness, in the prior art, the principle that orange is the complement...

AI Technical Summary

Problems solved by technology

Among the monomeric reactive dyes, the reactive black KN-B is cheap, and its fastness can barely meet the general requirements in all aspects, but it has insufficient blackness, directness, low color fixation rate, color fastness to wet rubbing and perspiration resistance. Therefore, in recent years, more and more attention has been paid to the research and development of new black reactive dyes with high blackness, high color fixation rate and high color fastness.

[0003] In order to improve the blackness, in the prior art, the principle that orange is the complementary color of navy blue is mainly used. Although the dye properties of reactive black KN-B are improved to a certain extent by blending orange components and / or yellow components, there are still Insufficient directness, low color fixation rate, color fastness to wet rubbing and color fastness to perspiration

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