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Single diazo compound, its preparation method and use

A technology for dispersing yellow and monoazo, applied in the direction of monoazo dyes, azo dyes, dyeing methods, etc., can solve the problems of not meeting environmental protection requirements and achieve good color fastness

Inactive Publication Date: 2009-06-24
闰土控股集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because disperse yellow RGFL is easy to decompose under certain conditions to produce carcinogenic aromatic amines, it can no longer meet the increasingly stringent environmental protection requirements.

Method used

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  • Single diazo compound, its preparation method and use
  • Single diazo compound, its preparation method and use
  • Single diazo compound, its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] ① Diazotization

[0019] Slowly add sulfuric acid and nitrosylsulfuric acid into a 150ml three-neck flask, and cool down with a water bath outside to control the temperature at about 15-20°C. After stirring for 0.5hr, add 20 grams of 3,4-dichloroaniline. The addition should not be too fast. A certain feeding speed should be controlled to prevent the material from agglomerating. The entire feeding time is controlled at 1.5hr. End point (1. Diazonium salt can be clear and transparent in ice water; 2. Diazonium salt can make starch potassium iodide test paper turn blue), and the prepared 3,4-dichloroaniline diazonium salt is set aside.

[0020] ②Coupling reaction

[0021] Add 200ml of absolute alcohol to a 1000ml beaker, add 28 grams of N-cyanoethyl-N-benzylaniline, 1.2 grams of emulsifier TX-15, beat for 3 hours, add 1.5 grams of sulfamic acid, and control the temperature at about 20 °C Add diazonium solution dropwise for 1.5 hr, stir and react at 20°C for 12 hr, measur...

Embodiment 2

[0026] Add 200ml of DMF to a 1000ml beaker, add 28 grams of N-cyanoethyl-N-benzylaniline, stir to dissolve it, add 1.5 grams of sulfamic acid, control the temperature at about 20 °C and add dropwise Example 1 to obtain heavy Nitrogen solution, the drop time is 1.5hr, stir and react at 20°C for 12hr, measure the reaction end point (use the osmosis ring method to check that the diazonium salt is slightly excessive), continue to keep warm and stir for 40 minutes, filter and wash with water until neutral, and get a paste The substance is the product.

[0027] Grind the obtained paste with the diffusing agent CNF at a ratio of 1:2, and then spray dry to obtain the disperse yellow dye of the present invention.

[0028] Test the color fastnesses of disperse yellow dyes according to the method described in Example 1, and the test results are shown in Table 1.

Embodiment 3

[0030] Substitute 3,4-dichloroaniline with 2,3-dichloroaniline, and prepare according to the method of Example 1 to obtain the disperse yellow dye of the present invention.

[0031] Test the color fastnesses of disperse yellow dyes according to the method described in Example 1, and the test results are shown in Table 1.

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Abstract

A monoazo compound used for the disperse yellow dye with high dye fastness is prepared through diazotizing reaction between dichlorophenylamine and nitrosylsulfuric acid in sulfuric acid to obtain diazonium salt, coupling reaction on N-cyanoethyl-N- benzylphenylamine and post-treating.

Description

(1) Technical field [0001] The invention relates to a monoazo compound, a preparation method and its use. (2) Background technology [0002] As we all know, Disperse Yellow RGFL (C.I. Disperse Yellow 23) is a very important disperse dye species. Although its synthesis process is simple, it can obtain excellent dyeing performance when applied to polyester fiber dyeing, such as fastness to light. Up to grade 6, soaping resistance grade 4~5, good level dyeing property. In addition, Disperse Yellow RGFL can also be combined with C.I. Disperse Red 60 and C.I. Disperse Blue 56 to form low-temperature three primary colors with excellent compatibility. However, because disperse yellow RGFL is easy to decompose under certain conditions to produce carcinogenic aromatic amines, it can no longer meet the increasingly stringent environmental protection requirements. (3) Contents of the invention [0003] The purpose of the present invention is to provide a monoazo compound, a prepara...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C245/08C09B29/08C09B67/38D06P1/18
Inventor 阮伟祥陈立火陈永尧
Owner 闰土控股集团有限公司
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