Black and active dye

Abstract

The invention provides a black composite reactive dye having three primary color constituents comprising, green disazo dye employing ethylene sulfone series arylamine or aniline derivative as diazo component and H acid as coupling component, one ore more red disazo dyes employing sulfoalkyl J acid or carboxymethyl J acid derivatives as coupling components, one ore more yellow bisazo or polyazo dyes employing sulfochlorinated 3,5-diaminobenzoic acid or sulfoalkyl derivatives as coupling components. The dye can be applied to intermittent and continuous dyeing for cellulose fiber, protein fiber, poly nylon and their fiber mixed fabrics.

Description

technical field [0001] The invention relates to the composition and synthesis process of a multi-component dark black reactive dye. Its characteristic is that the coloring speed of each component of the dye is similar to that of the fiber, and the dyed fiber has good blackness, level dyeing and good fastness. The dye is suitable for exhaust dyeing, pad-steaming, pad-baking and pad-stacking and jet dyeing of cellulose fibers, protein fibers and polyamide fibers. Background technique [0002] Black dye is the most widely used and most productive color in dyes. Among them, C.I. Reactive Black 5 is the most productive reactive dye in the world. But as a black dye, its blackness is not enough. In 1988, South Korea used the principle of complementary color to improve the blackness of the dyed fiber by adding the following orange components, which doubled the output of reactive black. At the same time, it has become the pioneer to improve the quality of active black through dye...

AI Technical Summary

Problems solved by technology

[0004] Although the output of reactive black obtained by the above-mentioned dyes has reached 10,000 tons, this blended dye has the following serious disadvantages: (1) the blackness is still not ideal, and cannot reach the level of deep black; (2) the two are water soluble There is a large difference in directness and directness to cellulose fibers, and the compatibility of dyeing performance is poor: the affinity to fibers is also quite different. The orange O1 dye has a higher affinity to fibers and is first adsorbed to the fibers, resulting in color differences at different times during the dyeing process. It is easy to cause color flowers; especially when adding alkali to fix the color, the orange component is easy to precipitate and cause stains; (3) There is a difference in reactivity between the two

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