A kind of composite reactive blue dye and its application

Abstract

The invention relates to the field of dyes and particularly relates to a composite reactive blue dye and an application thereof. The composite reactive blue dye comprises the following dyes by weight percentage for composition: 1-50% of dye as shown in formula (1), 5-99% of dye as shown in formula (2), 0-50% of dye as shown in formula (3) and 0-50% of dye as shown in formula (4) and the balance of additives. The composite reactive blue dye provided by the invention has good dischargeability and resistance, can be used in printing and can be used for not only direct printing, but also resist printing and discharge printing; furthermore, discharge printing and resist printing processes are simple and the effects are good. The composite reactive blue dye provided by the invention has various excellent fastness, in particular to wet fastness and rubbing fastness. Secondly, the composite reactive blue dye has the advantages of low price, simplicity in use, good economic benefits, great stability and compatibility and can greatly reduce the defective rate.

Description

technical field [0001] The invention relates to the field of dyes, in particular to a composite reactive blue dye and its application. Background technique [0002] When cellulose fibers are dyed with reactive dyes, the mainstream dyeing and finishing methods are exhaust dyeing, tie-dyeing, printing, etc. Dyes commonly used in cotton fabric printing are: reactive dyes, soluble vat dyes, insoluble azo dyes, stable insoluble azo dyes, coatings, etc. According to different printing methods, it can be divided into: direct printing, resist printing, discharge printing, etc. [0003] However, the applicability of many traditional printing reactive blue dyes is not high. Some reactive blue dyes (such as reactive blue 49, reactive green blue 71, reactive green blue 72, etc.) can be printed directly, but they cannot be used for resist printing and discharge printing. . In wax printing, indigo and Indian blue are widely used. Since these two dyes are vat dyes, the process is cumber...

AI Technical Summary

Problems solved by technology

[0003] However, the applicability of many traditional printing reactive blue dyes is not high. Some reactive blue dyes (such as: reactive blue 49, reactive green blue 71, reactive green blue 72, etc.) can be printed directly, but they cannot be used for resist printing and discharge printing.

In wax printing, a large amount of indigo and Indian blue are used. Since these two dyes are vat dyes, the process is cumbersome, the process is not easy to control, and defects have occurred. Post-processing such as reduction cleaning is required after dyeing. A lot of waste water will be produced in the process

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