Directly crosslinked blue dye preparation process

Abstract

This invention relates to a process for producing directly crosslinked blue dye, comprising: mix 3,3,-dimethoxyldiaminobiphenyl with sodium nitrite under acidic condition to produce diazol, the diazol performs the first coupling reaction with 1-hydroxynaphthalene-3,6,8-trisulfonic acid to produce monoazo dye, the monoazo dye performs the second coupling reaction with N,N-phenyl-2-amidol-5-naphthol-7-sulfonic acid to produce disazo dye, the disazo dye is mixed and reacts with copper sulfate solution and aminoethyl alcohol to produce the directly crosslinked blue dye solution, and then it can obtain the directly crosslinked blue dye by salting out and drying. By means of copper complex reaction, the 3,3-dimethoxyldiaminobiphenyl can react with copper to produce metal complex direct dye, without carcinogenic arylamine, which provides the blue dye with a high safety, and at the same time, the blue has benefits of high temperature resistance, good paintability, fading resistance and good abradability.

Description

technical field [0001] The invention relates to a preparation process of a dye, in particular to a preparation process of a directly cross-linked blue dye. Background technique [0002] In the prior art, when dyeing polyester cotton, polyester and cotton need to be dyed separately, polyester is dyed with disperse dyes, and cotton is dyed with direct dyes or reactive dyes. The temperature during dyeing with disperse dyes is relatively high, while reactive dyes and most Direct dyes are not resistant to high temperatures, and the dyeing process needs to be carried out separately. The process is more complicated, resulting in waste of resources. With the development of the textile industry, people have higher and higher requirements for dyes, which are required to have the advantages of high temperature resistance, good colorability, not easy to fade, and good wear resistance. However, the existing domestic dye preparation process, the production The d...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, when dyeing polyester cotton, polyester and cotton need to be dyed separately, polyester is dyed with disperse dyes, and cotton is dyed with direct dyes or reactive dyes. The temperature during dyeing with disperse dyes is relatively high, while reactive dyes and most Direct dyes are not resistant to high temperature, the dyeing process needs to be carried out separately, the process is more complicated, resulting in waste of resources

With the development of the textile industry, people have higher and higher requirements for dyes, which are required to have the advantages of high temperature resistance, good colorability, not easy to fade, and good wear resistance. However, the existing domestic dye preparation process, the production The dyes produced have not yet met people's high requirements for dyes, or are not heat-resistant enough, or have poor colorability, or are easy to fade, etc.

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