Yellow disperse dye capable of dyeing in acid and alkaline baths

A disperse dye, yellow technology, applied in the direction of azo dyes, organic dyes, monoazo dyes, etc., can solve the problems of poor dyeing reproducibility, inconvenient dyeing and finishing process, different color depth of fabrics, etc., to achieve excellent washing and Sublimation fastness, simplified process, bright color effect

Active Publication Date: 2011-11-23
PENGLAI JIAXIN DYES & CHEM
View PDF4 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for some disperse dyes with high washing fastness, the dyeing bath should be strictly controlled at PH=4.0-4.5, otherwise it will lead to different colors and lower depth of dyed fabrics, that is, poor dyeing reproducibility
[0003] However, the pre-dyeing finishing of polyester fabrics, such as: alkali reduction, scouring, desizing and other treatments are all carried out under alkaline conditions, and the cleaning after dyeing is also carried out under alkaline conditions. Only the dyeing of disperse dyes needs to be carried out in weak acid (PH=5-6) in the bath, which brings a lot of inconvenience to the overall dyeing and finishing process

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
  • Yellow disperse dye capable of dyeing in acid and alkaline baths
  • Yellow disperse dye capable of dyeing in acid and alkaline baths
  • Yellow disperse dye capable of dyeing in acid and alkaline baths

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0018] Add 100 grams of ice water and 5.46 grams (0.05 gmol) of 98% p-toluidine in a 250 milliliter three-necked flask, then add 15.2 grams of 30% hydrochloric acid, stir until fully dissolved on an ice-water bath, and then stir at 0-10 ° C Add dropwise 14.1 grams (0.051 gmol) of 25% sodium nitrite solution, and react at 0-5°C until p-toluidine disappears, then add about 0.5 gram of sulfamic acid, check with starch potassium iodide test paper until the test paper is colorless after stirring, The diazo solution is to be coupled.

[0019] Add 250 milliliters of water and 7.5 grams (0.049 gmol) of 98% m-aminoacetanilide in a 1000 milliliter beaker, then add 30 grams of 30% hydrochloric acid and stir until completely dissolved, then add the above-mentioned diazonium solution for coupling and reaction Until the coupling component disappears, filter and wash with water until neutral to obtain 30-35 grams of intermediate product filter cake, about 13 grams of dry product.

[0020] A...

preparation example 2-9

[0023] According to the molar ratio of Preparation Example 1, the same synthetic method can obtain the respective corresponding dyes in the general formula of the dyes, and the substituents of the resulting products are shown in the following table:

[0024] Preparation No.

Embodiment 1

[0026] Get 20 grams of the dye of Preparation Example 1, 20 grams of diffusing agent MF, 20 grams of sodium lignin sulfonate and 90 grams of water, and filter when the degree of diffusion reaches 4-5 grades. The dye slurry is quickly dried to obtain yellow disperse dyes.

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 relates to a yellow disperse dye capable of dyeing in acid and alkaline baths. The structural formula of the yellow disperse dye is shown in the specification, wherein, R1 is CH3, OCH3, OC2H5 or NHCOCH3; R2 is CH3 or NHCOR3; and R3 is H, CH3 or C2H5. The dye provided by the invention can be used for dyeing and printing of terylene and blended fabrics thereof, and especially is suitable for high-temperature high-pressure dyeing. In weak acid and strong alkaline baths (pH = 4.0-14), the yellow disperse dye can acquire the same dyeing shade and depth, and has good reproducibility and excellent sublimation and washing fastness.

Description

technical field [0001] The invention relates to a disperse dye, in particular to a yellow disperse dye which can be dyed in an acidic or alkaline bath. Background technique [0002] When using high temperature and high pressure dyeing method to dye disperse dyes, acetic acid and ammonium dihydrogen phosphate are often used to adjust the pH value, and the pH value is generally controlled at 5-6 to ensure the reproducibility of the shade and depth of the dyed fabric. Especially for some disperse dyes with high washing fastness, the dyeing bath should be strictly controlled at PH=4.0-4.5, otherwise it will cause the fabric to be dyed with different colors and lower depth, that is, the dyeing reproducibility is not good. [0003] However, the pre-dyeing finishing of polyester fabrics, such as: alkali reduction, scouring, desizing and other treatments are all carried out under alkaline conditions, and the cleaning after dyeing is also carried out under alkaline conditions. Only t...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09B29/085C09B67/38
Inventor 王喆王淑香张绍阳
Owner PENGLAI JIAXIN DYES & CHEM
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