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Azo type disperse dyes suitable for dyeing in acid-alkaline bath, preparation and application

A disperse dye, alkaline technology, applied in azo dyes, monoazo dyes, dyeing methods, etc., can solve the problems of poor dye depth, low dyeing rate, slow dyeing speed, etc., and achieve sublimation fastness. Good, high dye uptake, good reproducibility

Active Publication Date: 2016-09-14
ZHEJIANG RUNTU INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disperse dyes with the above structure have disadvantages such as slow dyeing speed, low dyeing rate and poor dyeing depth when dyeing polyester fibers.

Method used

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  • Azo type disperse dyes suitable for dyeing in acid-alkaline bath, preparation and application
  • Azo type disperse dyes suitable for dyeing in acid-alkaline bath, preparation and application
  • Azo type disperse dyes suitable for dyeing in acid-alkaline bath, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First add 13.3 grams (100%) of nitrosyl sulfuric acid (0.105 mole), jacket cooling, slowly add 19.5 grams (100%) 3-amino-5-nitro-2,1-benzisothiazole (0.1 mol), when adding, the temperature was less than 5°C, and the temperature was kept at 0-5°C for 4 hours to obtain diazonium liquid; Aniline (0.105 mol) was dissolved in 20 grams of 98% sulfuric acid and 250 grams of ice water, added crushed ice to cool below 0°C, then added dropwise the diazo solution to the coupling components under stirring at 0-5°C, and reacted to The diazo component disappears as the end point, the temperature is raised to 70°C, filtered, the filter cake is washed with water until neutral, and dried to obtain 42.2 grams of disperse dye. Yield 88.8%.

Embodiment 2～6

[0024] Adjust the molar ratio of the coupling component: diazo component to 1.08:1.0; 1.02:1.0 and the filtration temperature of the coupling material to 50°C; 60°C; 80°C. The results are summarized in Table 1 below:

[0025] Table 1

[0026]

[0027]

[0028] A series of physical and chemical performance tests were carried out in the above-mentioned embodiments 1-6, and the specific test results are shown in Table 2:

[0029] Table 2

[0030] Example

Melting pointm.p(℃)

R f value

Maximum absorption wavelength max(nm)

hue

1

164.7-165.7

0.27

600

Royal blue

2

163.5-164.4

0.27

600

Royal blue

3

163.5-164.5

0.27

600

Royal blue

4

163.8-164.7

0.27

600

Royal blue

5

163.8-164.7

0.27

600

Royal blue

6

163.0-163.9

0.27

600

Royal blue

[0031] Dyeing application

[0032] The dye monomer that embodiment 1-6 makes is respectively with met...

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Abstract

The invention discloses an azoic disperse dye suitable for dyeing in an acidic-alkaline bath. The azoic disperse dye has a structural formula as shown in the specification, wherein A is a diazo component, and the diazo component is 3-amino-5-nitro-2,1-benzisothiazole. The invention further discloses a preparation method and application of the azoic disperse dye. The azoic disperse dye disclosed by the invention is significantly improved in polyester fiber dyeing properties and has a wide pH adaptation range, good deep dyeing properties and good sublimation fastness. In addition, the azoic disperse dye has a high dyeing rate and good reproducibility and particularly can achieve the same deep color effect and the same dyeing effect when used for dyeing a polyester fiber in an acidic-alkaline dyeing bath with a pH value of 4.0-10.0. The common disperse dyes are only suitable for dyeing the polyester fibers in a weakly acidic dyeing bath, and most of the disperse dyes are not suitable for deep dyeing.

Description

technical field [0001] The invention belongs to the technical field of dye synthesis, in particular to an azo-type disperse dye dyed in an acid-alkaline bath. Background technique [0002] General disperse dyes can be used to dye polyester fibers, polyamide fibers and acetate fibers, but most of them cannot be dyed dark colors, and disperse dyes for dyeing polyester fibers are only suitable for dyeing in weak acid baths. [0003] European Patent Document EP 0136619 once described a class of disperse dyes, in which the nitrogen atom of the coupling component in the azo dye is connected to a cyanoethoxyethyl group, and is also connected to a cyanoethyl group. Some dyes are already listed in the Color Index, for example: [0004] The structural formula of C.I.Disperse Orange 80 is [0005] [0006] The disperse dye of the above structure has the disadvantages of slow dyeing speed, low dyeing rate and poor dyeing depth when dyeing polyester fibers. [0007] With the develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D275/04C09B29/09C09B67/38C09B67/36C09B67/42D06P1/18
Inventor 陈伟兴高立江谢子平严伟英
Owner ZHEJIANG RUNTU INST
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