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

A technology of benzothiazoles and disperse dyes, applied in chemical instruments and methods, dyeing methods, azo dyes, etc., can solve the problems that the relationship between dye molecular structure and alkali resistance and oxidation resistance has not yet formed a system

Active Publication Date: 2020-11-24
QINGDAO UNIV +1
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the oxidation resistance of disperse dyes, and the relationship between

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for enhancing alkali resistance and oxidation resistance of benzothiazole disperse dyes
  • Method for enhancing alkali resistance and oxidation resistance of benzothiazole disperse dyes
  • Method for enhancing alkali resistance and oxidation resistance of benzothiazole disperse dyes

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0122] Example 1

[0123] A benzothiazole class disperse dye with the following structural formula,

[0124]

[0125] Its synthetic route is:

[0126]

[0127] Its preparation method comprises the following steps:

[0128] (1) diazo reaction: get 2-amino-5,6-dichlorobenzothiazole (0.04mol) and join in single-necked flask, add 20.00ml water and 15.6g 98% sulfuric acid solution, be cooled to 0 ℃, in Add an appropriate amount (12.7g) of nitrosyl sulfuric acid under stirring (300-500rpm), and after stirring evenly, use starch-potassium iodide test paper to detect blue color to ensure that the nitrosyl sulfate is excessive, continue the reaction for 3h, and add 3.88g amino acid after the reaction is complete Sulfuric acid eliminates excess nitrosyl sulfuric acid, and continues stirring for 15 min at 0 °C to obtain diazo liquid;

[0129] (2) Coupling reaction: add 60 mL of water and 2 mL of H into the double-necked flask 2 SO 4 and the coupling component (N-ethyl-N-p-tolyla...

Example Embodiment

[0133] Example 2

[0134] A benzothiazole class disperse dye with the following structural formula,

[0135]

[0136] Its synthetic route is:

[0137]

[0138] Its preparation method comprises the following steps:

[0139] (1) Diazo reaction: "2-amino-5,6-dichlorobenzothiazole" in step (1) of Example 1 is adjusted to "2-amino-6-chlorobenzothiazole", other and examples Step (1) of 1 remains the same;

[0140] (2) coupling reaction: consistent with step (2) of Example 1;

[0141] (3) Dissolve the filter cake obtained in step (2) in 95% ethanol solution (the ethanol solution can dissolve the filter cake), reflux at 70° C. for 2 hours, recrystallize after cooling, filter and dry to obtain benzoyl Thiazole-based disperse dyes.

[0142] The obtained benzothiazole-based disperse dyes were characterized by their structure, and the results of the hydrogen nuclear magnetic resonance spectrum ( figure 2 )for:

[0143] 1 H NMR (400MHz, CDCl 3 )δ8.11(s,1H,Ar-H,1),7.96-7.93(...

Example Embodiment

[0144] Example 3

[0145] A benzothiazole class disperse dye with the following structural formula,

[0146]

[0147] Its synthetic route is:

[0148]

[0149] Its preparation method comprises the following steps:

[0150] (1) Diazo reaction: Adjust "2-amino-5,6-dichlorobenzothiazole" in step (1) of Example 1 to "2-amino-6-nitrobenzothiazole", other and implement Step (1) of Example 1 remains the same;

[0151] (2) coupling reaction: consistent with step (2) of Example 1;

[0152] (3) Dissolve the filter cake obtained in step (2) in 95% ethanol solution (the ethanol solution can dissolve the filter cake), reflux at 70° C. for 2 hours, recrystallize after cooling, filter and dry to obtain benzoyl Thiazole-based disperse dyes.

[0153] The obtained benzothiazole-based disperse dyes were characterized by their structure, and the results of the hydrogen nuclear magnetic resonance spectrum ( image 3 )for:

[0154] 1 H NMR (500MHz, CDCl 3 )δ8.08-7.99(d,1H,Ar-H,1),7.9...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for enhancing alkali resistance and oxidation resistance of benzothiazole disperse dyes, and belongs to the field of disperse dyes. According to the method, four diazocomponents and eight coupling components are adopted to design and synthesize 28-branch thiazole heterocyclic azo disperse dyes, so that the alkali resistance and the oxidation resistance of the disperse dyes are enhanced. The synthesized disperse dyes are subjected to structure confirmation, and the alkali resistance, the oxidation resistance and other dyeing properties of the disperse dyes aretested. According to the method for enhancing the alkali resistance and the oxidation resistance of the benzothiazole disperse dyes, the relationship between the dye structure and the alkali resistance and the oxidation resistance is clear, the disperse dyes with excellent alkali resistance and oxidation resistance are obtained, and the dyeing property is stable under the dyeing condition of 10g/Lsodium hydroxide or 5g/L hydrogen peroxide. The dyes can be applied to bleaching and dyeing one bath of polyester cotton and decrement dyeing one bath of polyester, short-process dyeing and finishingprocessing is achieved, and huge ecological benefits and economic benefits are generated.

Description

technical field [0001] The invention relates to a method for enhancing the alkali resistance and oxidation resistance of benzothiazole disperse dyes, belonging to the field of disperse dyes. Background technique [0002] Polyester is the largest and most widely used fiber variety among many synthetic fibers. The unique linear macromolecular structure of polyester endows its fabric with good strength, elasticity, abrasion resistance, heat resistance and practicality. Polyester has tight fiber structure, small molecular gap, high crystallinity, and less hydrophilic groups in the molecule, so disperse dyes with relatively small molecular weights are often used for dyeing. In order to achieve a good dyeing effect, the fiber is usually heated during dyeing. Since polyester is a thermoplastic fiber, when the heating temperature is higher than the glass transition temperature (Tg) of polyester, the crystallization area inside the fiber is reduced, and the movement of the macromole...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09B29/045C09B29/09D06P1/16D06P3/82
CPCC09B29/0088C09B29/08C09B29/0844D06P3/8233D06P1/18D06P3/54
Inventor 许长海于家学王小艳何亮邱明涛赵新婷杜金梅唐敬淋
Owner QINGDAO UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap