Disperse dye compound as well as preparation method and use of disperse dye compound

Abstract

The invention discloses a disperse dye compound as well as a preparation method and the use of the disperse dye compound. The structural formula of the disperse dye compound is as shown in a formula I which is as shown in the specification. The disperse dye compound is prepared by selecting the C.I. disperse blue 106 dye to be subjected to coupling reaction with a diformyl chlorine compound. When the disperse dye compound is applied to dyeing polyurethane or polylactic acid fibers, the washing fastness and the sublimation fastness can be obviously improved.

Description

Technical field: [0001] The invention relates to a novel disperse dye, in particular to a disperse dye compound and its preparation method and application. 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 i...

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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