Method for enhancing alkali resistance and oxidation resistance of benzoisothiazole disperse dyes

A technology of benzisothiazoles and disperse dyes, which is applied in the textile field and can solve problems such as long running time, polluting the environment, and cumbersome processes

Active Publication Date: 2020-11-27
QINGDAO UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole process takes a long time to run, the process is cumbersome, the water consumption and energy consumption are large, and the sewage discharge is large, polluting the environment

Method used

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  • Method for enhancing alkali resistance and oxidation resistance of benzoisothiazole disperse dyes
  • Method for enhancing alkali resistance and oxidation resistance of benzoisothiazole disperse dyes
  • Method for enhancing alkali resistance and oxidation resistance of benzoisothiazole disperse dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] A kind of benzisothiazole disperse dye shown in the following structural formula,

[0101]

[0102] Its synthetic route is:

[0103]

[0104] Its preparation method comprises the following steps:

[0105] (1) Diazo reaction: Take 3-amino-5-nitrobenzisothiazole (19.5g, 0.1mol) and join in a single-necked flask, add 50mL of 98% concentrated H 2 SO 4 , lower the temperature to 0°C, add an appropriate amount (12.7g) of nitrosylsulfuric acid under stirring (300-500rpm), stir evenly, and use starch-potassium iodide test paper to detect the blue color to ensure that the nitrosylsulfuric acid is excessive, and continue the reaction for 3h. After the reaction, add 3.88g of sulfamic acid to eliminate excess nitrosylsulfuric acid, and continue stirring at 0°C for 15 minutes to obtain diazonium solution;

[0106] (2) Coupling reaction: add 60mL water, 2mL H 2 SO 4 and the coupling component (N, N-diethylaniline (0.1mol), cool down to 8°C to obtain a coupling solution; un...

Embodiment 2

[0111] A kind of benzisothiazole disperse dye shown in the following structural formula,

[0112]

[0113] Its synthetic route is:

[0114]

[0115] Its preparation method comprises the following steps:

[0116] (1) diazonium reaction: with the step (1) of embodiment 1;

[0117] (2) Coupling reaction: add 60mL water, 2mL H 2 SO 4 and the coupling component (N-ethyl-N-hydroxyethylaniline) (0.1mol), cool down to 5°C to obtain the coupling solution; under stirring, slowly add the diazonium solution obtained in step (1) to the coupling solution, continue to react at 5°C for 2h, then continue to react for 4h after raising the temperature to 10°C, and then add sodium hydroxide to adjust to neutrality to obtain the product; filter the obtained product with suction, wash with water and dry to obtain a filter cake ;

[0118] (3) With the step (3) of embodiment 1.

[0119] The benzisothiazole class disperse dye that obtains is carried out structural characterization, and the...

Embodiment 3

[0122] A kind of benzisothiazole disperse dye shown in the following structural formula,

[0123]

[0124] Its synthetic route is:

[0125]

[0126] Its preparation method comprises the following steps:

[0127] (1) diazonium reaction: with the step (1) of embodiment 1;

[0128] (2) Coupling reaction: add 60mL water, 2mL H 2 SO 4 and the coupling component (N-ethyl-N-hydroxyethyl-m-toluidine) (0.1mol), cool down to 5°C to obtain a coupling solution; under stirring, slowly drop the diazonium solution obtained in step (1) Add it into the coupling solution, continue to react at 5°C for 3h, raise the temperature to 10°C, and then continue to react for 3h, then add sodium hydroxide to adjust to neutrality to obtain the product; filter the obtained product with suction, wash with water and dry to obtain filter cake;

[0129] (3) With the step (3) of embodiment 1.

[0130] The benzisothiazole class disperse dye that obtains is carried out structural characterization, and ...

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Abstract

The invention discloses a method for enhancing alkali resistance and oxidation resistance of benzoisothiazole disperse dyes, and belongs to the technical field of textiles. The method starts from thestructural design of the dye; an azo alkali-resistant disperse dye taking the benzoisothiazole as a diazo component is synthesized; different groups are introduced into the coupling component to enhance the alkali resistance and oxygen bleaching resistance of the heterocyclic azo disperse dye, so that a series of benzoisothiazole disperse dyes with alkali resistance and oxidation resistance strength difference gradients are obtained; the disperse dye capable of meeting the requirements of a polyester-cotton blended fabric bleached cotton and disperse dyeing polyester one-bath process or a polyester fabric alkali deweighting and disperse dyeing one-bath process is determined, and a reference can be provided for the structural design of alkali-resistant and oxidation-resistant disperse dyes.

Description

technical field [0001] The invention relates to a method for enhancing the alkali resistance and oxidation resistance of benzisothiazole disperse dyes, belonging to the technical field of textiles. Background technique [0002] Polyester-cotton blended fabrics not only have the hygroscopic properties of cotton fibers but also have the good wear resistance of polyester fibers, and also have iron-free performance and quick-drying performance. They are very popular among consumers and occupy an important position in clothing fabrics. However, since the polyester-cotton blended fabric is composed of two kinds of fibers with different properties, it is necessary to take into account the two kinds of fibers during the dyeing and finishing process, which generally needs to be carried out in multiple steps. Generally speaking, the polyester-cotton blended fabrics are firstly subjected to pretreatment such as scouring and bleaching under alkaline conditions. Add acetic acid to adjus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B29/039C09B67/38D06P1/16D06P3/85D06P3/54
CPCC09B29/0081C09B67/008D06P1/16D06P3/8233D06P3/54
Inventor 许长海王小艳何亮邱明涛赵新婷杜金梅唐敬淋
Owner QINGDAO UNIV
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