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Azo-structure disperse dye for dyeing polypropylene fibers and preparation method and dyeing process of azo-structure disperse dye

A polypropylene fiber and disperse dye technology, applied in the direction of azo dyes, monoazo dyes, disazo dyes, etc., can solve the problems of poor color fastness and low dye uptake, and achieve strong permeability and easy dyeing Dyeing, the effect of small molecular weight

Active Publication Date: 2022-02-25
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the study of polypropylene fiber dyeing, there are still problems such as low dyeing rate and poor color fastness. Therefore, a kind of dyeing effect that can show high dyeing rate and high color fastness on polypropylene fibers is developed. Special dyes have become an urgent problem in the dyeing industry

Method used

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  • Azo-structure disperse dye for dyeing polypropylene fibers and preparation method and dyeing process of azo-structure disperse dye
  • Azo-structure disperse dye for dyeing polypropylene fibers and preparation method and dyeing process of azo-structure disperse dye
  • Azo-structure disperse dye for dyeing polypropylene fibers and preparation method and dyeing process of azo-structure disperse dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Weigh 0.248g (2mmol) of p-aminothiophenol and dissolve it in a dilute hydrochloric acid solution. The dilute hydrochloric acid solution is formed by mixing 1440 μL of concentrated hydrochloric acid and 15 mL of distilled water. The above solution is placed in an ice bath and stirred with a rotor. Dissolve 0.15g (2.17mmol) of sodium nitrite in 8mL of distilled water, quickly add the sodium nitrite aqueous solution to the mixed solution of p-aminothiophenol and hydrochloric acid solution, the solution changes from colorless to brownish-yellow clear solution, in ice bath The reaction was carried out under the same conditions for 1 min, and the reaction end was detected using Ehrlich reagent and starch potassium iodide test paper to obtain a diazotized product, and sulfamic acid was used to remove excess nitrous acid.

[0057] In addition, 0.158g (1mmol) of 1,5-diaminonaphthalene was weighed and dissolved in 3mL of acetone solution, and cooled with ice water; the above-synth...

Embodiment 2

[0066] Weigh 0.124g (1mmol) of p-aminothiophenol and dissolve it in a dilute hydrochloric acid solution. The dilute hydrochloric acid solution is formed by mixing 720 μL of concentrated hydrochloric acid and 10 mL of distilled water. The above solution is placed in an ice bath and stirred with a rotor. Dissolve 0.076g (1.1mmol) of sodium nitrite in 4mL of distilled water, quickly add the sodium nitrite aqueous solution to the mixed solution of p-aminothiophenol and dilute hydrochloric acid solution, the solution changes from colorless to brownish-yellow clear solution. The reaction was carried out in a bath for 1 min, and the reaction end was detected using Ehrlich reagent and starch potassium iodide test paper to obtain a diazotized product, and sulfamic acid was used to remove excess nitrous acid.

[0067] In addition, 0.124g (1mmol) of p-methylthiophenol was weighed and dissolved in 3mL of acetone solution, and cooled with ice water; the above-mentioned synthetic diazotized ...

Embodiment 3

[0076] Weigh 0.138g (1mmol) of p-nitroaniline, dissolve it in a dilute hydrochloric acid solution, and this dilute hydrochloric acid solution is formed by mixing 720 μL of concentrated hydrochloric acid and 10 mL of distilled water. The above solution is placed in an ice bath and stirred with a rotor. 0.076g (1.1mmol) of sodium nitrite was dissolved in 4mL of distilled water, and the sodium nitrite aqueous solution was quickly added to the mixed solution of p-nitroaniline and dilute hydrochloric acid solution. The reaction was carried out under the conditions for 1 min, and the reaction end was detected using Ehrlich reagent and starch potassium iodide test paper to obtain a diazotized product, and sulfamic acid was used to remove excess nitrous acid.

[0077] In addition, 0.124g (1mmol) of p-methylthiophenol was weighed and dissolved in 3mL of acetone solution, and cooled with ice water; the above-mentioned synthetic diazotized product was added dropwise to it to carry out cou...

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Abstract

The invention relates to the technical field of disperse dyes, in particular to an azo-structure disperse dye for dyeing polypropylene fibers as well as a preparation method and a dyeing process of the azo-structure disperse dye. The method comprises the following steps: firstly, diazo reaction is carried out on a dye intermediate A containing an amino group and a sulfydryl group or a dye intermediate D containing an amino group and a sulfydryl group to generate a diazo component; the diazo component is subjected to a coupling reaction with a dye intermediate B or a dye intermediate C containing a sulfydryl group to generate the azo-structure disperse dye for dyeing the polypropylene fiber, which contains at least one sulfydryl group, and the azo-structure disperse dye is used for dyeing a polypropylene fiber fabric, so that the dyeing of the small-molecule azo-structure disperse dye is realized; the purpose of fixing the color by the macromolecular azo structure disperse dye is achieved, and the dye-uptake rate and the color fixation rate of the polypropylene fiber fabric are improved.

Description

technical field [0001] The invention relates to the technical field of disperse dyes, in particular to an azo structure disperse dye for polypropylene fiber dyeing and a preparation method and dyeing process thereof. Background technique [0002] Polypropylene fiber is a kind of fiber that can have good elasticity, high strength and toughness under heavy load. At the same time, it has the characteristics of light texture, strong coverage, wear resistance and excellent thermal insulation performance, making it widely used in Carpets, decorative fabrics, medical and other fields. Polypropylene is a fully saturated hydrocarbon polymer with no polar or reactive groups in its molecular chain. Due to the high degree of crystallinity of polypropylene fibers (the higher the degree of crystallinity, the lower the probability of dye molecules diffusing from outside to inside), resulting in their very strong hydrophobicity and chemical stability, so it is difficult to promote the impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B33/06C09B29/01C09B29/095D06P1/18D06P1/19D06P3/79D06P5/02
CPCC09B33/06C09B29/0003C09B29/095D06P1/18D06P1/19D06P3/794D06P5/02
Inventor 黄昊飞孟华杰李富强尹磊刘笑言荆泽昊张琪张文淑李春红张彩云郭敏李玉超左村村王晶王鸣
Owner SHANDONG UNIV OF TECH
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