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A kind of wet rubbing fastness improving agent for acid dyes and preparation method thereof

A technology of wet rubbing fastness and acid dyes, applied in dyeing method, textile and papermaking, etc., can solve the problems of complex synthesis process, poor wet rubbing fastness, strict color fixing process, etc., to improve film-forming performance and fixing ability , reduce entanglement, reduce the effect of violent gathering

Active Publication Date: 2022-04-15
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although tannic acid has a better color fixing effect, its color fixing process is strict and the process is complicated, which will cause the fabric to feel hard and even change the color and light. Synthetic tannin color fixing agents are gradually developed at home and abroad to replace tannic acid. These include formaldehyde phenolic condensates, thiophenolic compounds, and phenylsulfone compounds. However, due to the complex synthesis process, high cost, and possible emissions of toxic substances such as hydrogen sulfide and formaldehyde during the synthesis process, these substances cannot meet the needs of the market. requirements
[0003] Therefore, combined with the reality that acid dyes are easy to dissolve in water and lead to poor wet rubbing fastness, using the excellent flexibility and film-forming properties of polyurethane to develop a wet rubbing fastness improver that not only improves the color fixing effect but also is environmentally friendly, it seems very important

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
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  • A kind of wet rubbing fastness improving agent for acid dyes and preparation method thereof
  • A kind of wet rubbing fastness improving agent for acid dyes and preparation method thereof
  • A kind of wet rubbing fastness improving agent for acid dyes and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 9.1g of serinol, 31.4g of 88% formic acid solution, and 18.4g of 37% formaldehyde solution into a reaction vessel with a stirrer and condensing reflux device, turn on the stirring and condensing reflux device, and react at 25°C After 2 hours, gradually raise the temperature to 80°C, and keep at this temperature for 8h; adjust the temperature to 70°C, pressure to -0.1MPa, and recover most of the water and formic acid by vacuum distillation; cool to 25°C, and gradually add sodium hydroxide Adjust the pH to 12, dissolve with anhydrous methanol and filter, heat the filtrate to 60°C, and pressure to -0.1MPa, distill under reduced pressure to recover methanol, and obtain the chain extender as light yellow oil.

[0028] (2) Mix 20g of polyethylene adipate diol with 4g of acetone and add it into a reaction vessel with a stirrer and condensation reflux device; turn on the reflux device and stirrer, gradually raise the temperature to 70°C, and add 0.03g After dibutyltin d...

Embodiment 2

[0031](1) Add 9.1g of serinol, 31.4g of 88% formic acid solution, and 18.4g of 37% formaldehyde solution into a reaction vessel with a stirrer and condensing reflux device, turn on the stirring and condensing reflux device, and react at 25°C After 2 hours, gradually raise the temperature to 80°C, and keep at this temperature for 8h; adjust the temperature to 70°C, pressure to -0.1MPa, and recover most of the water and formic acid by vacuum distillation; cool to 25°C, and gradually add sodium hydroxide Adjust the pH to 12, dissolve with anhydrous methanol and filter, heat the filtrate to 60°C, and pressure to -0.1MPa, distill under reduced pressure to recover methanol, and obtain the chain extender as light yellow oil.

[0032] (2) Mix 20g of polyethylene adipate diol with 4g of acetone and add it into a reaction vessel with a stirrer and a condensing reflux device; turn on the reflux device and agitator, gradually raise the temperature to 70°C, and add 0.06g After dibutyltin d...

Embodiment 3

[0035] (1) Add 9.1g of serinol, 31.4g of 88% formic acid solution, and 18.4g of 37% formaldehyde solution into a reaction vessel with a stirrer and condensing reflux device, turn on the stirring and condensing reflux device, and react at 25°C After 2 hours, gradually raise the temperature to 80°C, and keep at this temperature for 8h; adjust the temperature to 70°C, pressure to -0.1MPa, and recover most of the water and formic acid by vacuum distillation; cool to 25°C, and gradually add sodium hydroxide Adjust the pH to 12, dissolve with anhydrous methanol and filter, heat the filtrate to 60°C, and pressure to -0.1MPa, distill under reduced pressure to recover methanol, and obtain the chain extender as light yellow oil.

[0036] (2) Mix 20g of polyethylene adipate diol with 4g of acetone and add it into a reaction vessel with a stirrer and condensation reflux device; turn on the reflux device and stirrer, gradually raise the temperature to 70°C, and add 0.03g After dibutyltin d...

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
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Abstract

The invention discloses a wet rubbing fastness improving agent for acid dyes and a preparation method thereof. A chain extender was synthesized from serinol, formic acid and formaldehyde, and then reacted with isophorone diisocyanate, polyester diol and the chain extender, capped with caprolactam, and emulsified at a high speed to obtain a kind of acid dye. Wet rubbing fastness enhancer. Molecules of the wet rubbing fastness improving agent provided by the invention contain a branched cationic structure, which can reduce molecular entanglement and improve the stability of the wet rubbing fastness improving agent; at the same time, the exposed cationic groups are conducive to combining with acid dye anions to form insoluble color lakes And improve the wet rubbing fastness; also because the wet rubbing fastness improving agent contains closed isocyanate groups in the molecule, after unblocking at an appropriate temperature, it can cross-link with the active groups on the fiber to form a film, and the film is firm Covering the fabric further improves the wet rubbing fastness of the fabric.

Description

technical field [0001] The invention relates to the technical field of synthesis of textile printing and dyeing auxiliaries, in particular to a wet rubbing fastness improving agent for acid dyes and a preparation method thereof. Background technique [0002] Traditional acid dyes generally refer to dyes containing acidic groups in their molecular structure. Most of the acidic groups contained are in the form of sulfonate and carboxylate. Under dyeing, therefore, it is customarily called acid dye. There are many kinds of acid dyes, which have the advantages of convenient use, complete chromatogram, and bright color. They are often used for dyeing fibers such as nylon, silk, and wool. When acid dyes are used to dye fabrics, the non-polar part of the dye is combined with the fiber by van der Waals force and hydrogen bond, and the anion part is combined with cationic groups such as amino groups on the fabric by ionic bonds. Due to the presence of a large number of water-solubl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G18/28D06P1/52D06P1/39
CPCC08G18/6655C08G18/4238C08G18/3275C08G18/2855D06P1/5285D06P1/39
Inventor 周向东曾月勇
Owner SUZHOU UNIV
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