Disperse dye compound as well as preparation method and application thereof

Abstract

The invention discloses a disperse dye compound as well as a preparation method and an application thereof. The disperse dye compound has a structural formula shown in the formula I in the specification. C.I. disperse red 13 dye is selected to have a coupling reaction with a benzenedicarbonyl chloride compound, the disperse dye compound is prepared, and washing fastness and sublimation fastness of the disperse dye compound are remarkably improved when the disperse dye compound is applied to spandex or polylactic acid fiber dyeing.

Description

Technical field: [0001] The invention relates to a novel disperse dye, in particular to a disperse dye compound and its preparation method and use. Background technique: [0002] Disperse dyes were first used in acetate fibers, and then developed rapidly with the development of polyester fibers (polyester). Now there are many kinds of disperse dyes and complete chromatograms. According to the structure, they can be divided into azo type, anthraquinone type, methine type, and o-nitroaniline type. Among them, the most interesting chemical structures are azo and anthraquinone type disperse dyes. Disperse dyes with azo structure have the advantages of relatively complete chromatogram, high color intensity (that is, high molar extinction coefficient), easy manufacture and good economy. Anthraquinone-type disperse dyes have the characteristics of vividness, high light fastness and excellent dyeing performance, but there are also obvious disadvantages, such as low color intensity...

AI Technical Summary

Problems solved by technology

[0004] With the emergence of new fibers such as polyurethane fibers, polylactic acid fibers, and easily dyeable modified polyester (ECDP for short), it is difficult for existing disperse dyes to meet their dyeing performance requirements, and low tinting strength and poor color fastness generally occur. It is difficult to fundamentally solve the problem by only relying on screening and dyeing process improvement

Tracing it to its cause, be because the glass transition temperature of these fibers is relatively low, the space that the sub-segment movement of the amorphous region produces is more larger, and the phenomenon that disperse dyes appear easy to enter and come out when dyeing, shows that existing disperse dyes The affinity of this type of fiber is not large enough, resulting in thermal migration from the inside to the outside due to the intensification of the thermal movement of the dye molecules when the fiber is heated.

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