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Preparation method of anti-migration dye

An anti-migration and dyeing technology, applied in the field of dyes, can solve the problems of insufficient migration resistance of the leather layer and difficulty in meeting the requirements of high-quality terminal markets, and achieve high migration resistance

Inactive Publication Date: 2016-04-13
HUBEI WEIQING POLYMER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dyes produced by the old dye technology are not sufficiently resistant to the migration of the leather layer to meet the high quality end market requirements

Method used

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preparation example Construction

[0020] The embodiment of the present invention provides a preparation method of anti-migration dye, comprising the following steps:

[0021] Step 1: Add 4-topentyl-2-amino-6-nitrophenol to the sodium hydroxide solution, and add sodium nitrite to it, and stir evenly to obtain the A solution; mix water, ice and hydrochloric acid Prepare solution B, add solution A to solution B dropwise, and control the reaction temperature at 0-5°C, use potassium iodide-starch test paper to detect, maintain blue color, and obtain diazonium salt after diazotization. In this preferred implementation, 5-7g of 4-topentyl-2-amino-6-nitrophenol is dissolved in 50-60mL of water, and then added to 3-5mL of 30% sodium hydroxide solution, and Add 5-6 mL of 30% sodium nitrite, and the amount of hydrochloric acid in the B solution is 12-15 mL.

[0022] Step 2: Dissolving 1,3,5-pyrazolone in sodium carbonate and sodium hydroxide solution to obtain a coupling solution, adding the diazonium salt into the coup...

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Abstract

The invention relates to a preparation method of anti-migration dye. The preparation method includes the following steps that 4-amyl-2-amino-6-nitrophenol is added into a sodium hydroxide solution, and sodium nitrite is added so that a solution A can be obtained; the solution A is dropwise added into water, ice and hydrochloric acid so that diazonium salt can be obtained; 1,3,5-pyrazolone is dissolved in sodium carbonate and sodium hydroxide so that coupled liquid can be obtained, diazonium salt is added into the coupled liquid to react, and azo dye is obtained; basic chromium sulfate is dissolved in water, a salicylic acid solution dissolved through a sodium hydroxide solution is added, and a chromizing agent is prepared; the azo dye and the chromizing agent are mixed, the pH value is adjusted to be 10-11, a reaction solution is cooled to 65-70 DEG C with disappear of the azo dye as a reaction end point, the dye is precipitated and cooled to 45 DEG C or below, and filtering, washing and drying are performed so that the anti-migration dye can be obtained. The dye prepared through the preparation method is high in migration resistance and can meet the requirement of a high-quality terminal market.

Description

technical field [0001] The invention relates to a dye, in particular to a preparation method of an anti-migration dye. Background technique [0002] At present, dyes are widely used and are an indispensable part of modern life. However, the dyes produced by the old dyeing technology are not sufficiently resistant to the migration of the leather layer to meet the high-quality end market requirements. [0003] Therefore it is necessary to design a preparation method of anti-migration dyes to overcome the above problems. Contents of the invention [0004] The purpose of the present invention is to overcome the defects of the prior art and provide a preparation method of anti-migration dyes, which have high migration resistance and can meet the requirements of high-quality terminal markets. [0005] The present invention is achieved like this: [0006] The invention provides a kind of preparation method of anti-migration dye, comprising the following steps: [0007] Step 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B45/34
CPCC09B45/34
Inventor 汪国伟
Owner HUBEI WEIQING POLYMER TECH CO LTD
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