A kind of preparation method of reactive dye ruby

Abstract

The invention relates to a preparation method of reactive dye carnelian, comprising: performing a condensation reaction with a condensate to obtain a condensed product; performing a secondary condensation reaction with a condensed product to obtain a condensed product; making the condensed product in Carry out diazo reaction under the action of nitrous acid to obtain the first intermediate; make the first intermediate react with acid couple to obtain the second intermediate; make diazo reaction under the action of nitrous acid to obtain the third intermediate ; Make the second intermediate and the third intermediate carry out alkali coupling reaction to obtain the fourth intermediate; make the fourth intermediate and carry out three condensation reactions to obtain the reactive dye carnelian. The reactive dye prepared by the invention has high reactivity, good color fixation and dyeing ability, and does not need to add soda ash during dyeing, thus avoiding the use of soda ash. At the same time, the reactive dye also has high temperature resistance, and can be used in conjunction with disperse dyes to simultaneously dye T / R or T / C blended fabric products at a temperature higher than 100°C to achieve a one-bath dyeing process.

Description

technical field [0001] The invention belongs to the technical field of dyes, and in particular relates to a preparation method of reactive dye carnelian. Background technique [0002] When polyester-cotton blended fabrics currently on the market are dyed, the commonly used dyeing method is the two-bath method, that is, the fabric is first dyed with disperse dyes, washed, and then dyed with reactive dyes and washed. 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 one-bath one-bath dyeing of polyester and cotton. However, the existing reactive dye ruby ​​still has ...

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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 one-bath one-bath dyeing of polyester and cotton. However, the existing reactive dye ruby ​​still has a high temperature resistance difference, and can only be dyed at about 50°C, which is not suitable for one-bath dyeing with disperse dyes. one step dyeing

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