A kind of preparation method of reactive dye blue

Abstract

The invention relates to a preparation method of reactive dye blue, comprising: making the compound shown in formula I react with diazonium under the action of nitrous acid to obtain a first intermediate; making the first intermediate and the compound shown in formula II react with acid Couple reaction to obtain the second intermediate; make the compound shown in the formula III and the compound shown in the formula IV carry out a condensation reaction to obtain a condensation product; make the condensation product and the compound shown in the formula V carry out the secondary condensation reaction to obtain the second intermediate Condensate; make dicondensate carry out diazonium reaction under the effect of nitrous acid, obtain the third intermediate; make the second intermediate and the third intermediate carry out alkali coupling reaction, obtain the fourth intermediate; make the fourth intermediate Perform three condensation reactions with the compound shown in formula VI to obtain reactive dye blue, wherein the dye blue has high reactivity, good color fixing and dyeing ability, and can also be used in conjunction with disperse dyes. Dyeing polyester and cotton products at the same time to realize a one-bath dyeing process.

Description

A kind of preparation method of reactive dye blue technical field The invention belongs to dye technical field, be specifically related to a kind of preparation method of reactive dye blue. Background technique When the polyester-cotton blended fabrics on the market are dyed at present, the commonly used dyeing method is the two-bath method, that is, first by dividing The fabrics are dyed with loose dyes, washed, and then dyed with reactive dyes, washed. Although the same color is better, the fastness is better High, but the process is lengthy and the energy consumption is too much, which is not conducive to the energy saving, emission reduction and clean production of printing and dyeing enterprises. It can cause color flower and cylinder difference in production, affecting product quality and efficiency. In order to solve these problems, many factories are exploring polyester-cotton one-bath one-step dyeing, but the existing reactive dyeing Material blue still h...

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Problems solved by technology

Although the same color is good and the fastness is high, the process is lengthy and the energy consumption is too much, which is not conducive to energy saving, emission reduction and clean production of printing and dyeing enterprises, and as the processing time prolongs, there may be problems of color flower and cylinder difference in production , affecting product quality and efficiency

[0003] In order to solve these problems, many factories are exploring the one-bath one-step dyeing method of polyester and cotton. However, the existing reactive dye blue still has a high temperature resistance difference, and can only be dyed at about 50°C, which is not suitable for one-bath one-step dyeing with disperse dyes. dyeing

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