Acid dye for nylon fiber dyeing and preparation method thereof

An acid dye, nylon fiber technology, applied in azo dyes, organic dyes, monoazo dyes, etc., can solve the problems of waste water discharge, non-bright fibers, and dark color of metal complex dyes

Active Publication Date: 2021-05-25
JINHUA SHUANGHONG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. In the production process of acid metal complex dyes, heavy metal salts such as chromium, cobalt, and nickel are used, which will inevitably lead to the discharge of waste water containing heavy metals, which is difficult to treat, and the same problem will also occur in the dyeing process;
[0005] 2. The shade of metal complex dyes is darker, and the fibers are not bright after dyeing. This problem is the consensus of the dyeing disciplines
[0006] 3. The dyed fabrics dyed by such dyes containing complexed heavy metal ions are potentially harmful to human health

Method used

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  • Acid dye for nylon fiber dyeing and preparation method thereof
  • Acid dye for nylon fiber dyeing and preparation method thereof
  • Acid dye for nylon fiber dyeing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] C 17 h 24 N 4 o 3 S, molecular weight: the preparation method of 364.46], carries out following steps successively:

[0043] 1), the synthesis of 2-(diethylamino)-6-methyl-4-pyrimidinol

[0044]In 250mL of water, nitric acid (9.45g, 0.15mol) was slowly added dropwise (the dropping time was about 10 minutes), then diethylamine (10.22g, 0.14mol) was added dropwise (the dropping time was about 30 minutes), and stirred for 1.5 After h, cyanamide (12.60 g, 0.3 mol) was added dropwise (the dropping time was about 30 minutes), then the temperature was raised to 75° C., and the reaction was carried out for 5 hours. Immediately after the reaction, the reactant was cooled to below 5°C with an ice-water bath, cooled and precipitated, filtered, and the filter cake was dried at 80°C to constant weight to obtain a white solid (diethylguanidine nitrate). Dissolve the white solid in a mixed solvent consisting of 100ml of toluene and 30ml of ethanol, add 6g of NaOH (0.16mol) to con...

Embodiment 1

[0053] 1), diazotization:

[0054] 2-((4-aminophenyl)amino)-5-nitrobenzenesulfonic acid [2-((4-aminophenyl)amino)-5-nitrobenzenesulfonic acid; molecular formula: C 12 h 11 N 3 o 5 S; Molecular weight: 309.30] 30.93g (0.1mol) is dissolved in 400ml water, with 10% (mass %) sodium hydroxide aqueous solution, adjust pH=7.5, add sodium nitrite 7g (0.104mol) and stir until dissolving completely, ice bath Cool down to 0°C, then add to a solution consisting of 200g of crushed ice and 26g of 30% (0.21mol) hydrochloric acid, the addition time is 30 minutes, the temperature is controlled at 0 to 5°C during the addition, and after the addition is completed, the temperature is 0 to 5 ℃ and keep stirring for 60 minutes, the diazotization is completed, and the obtained diazonium salt solution is set aside.

[0055] 2), coupling

[0056] 4-(2-((2-(Diethylamino)-6-methylpyrimidin-4-yl)amino)ethyl)benzenesulfonic acid [4-(2-((2-(diethylamino)-6- methylpyrimidin-4-yl)amino)ethyl)benzenesul...

Embodiment 2～4

[0061] The 2-((4-aminophenyl)amino)-5-nitrobenzenesulfonic acid in step 1) of Example 1 was respectively replaced with 3-nitro-4-(4-aminophenylamino)benzenesulfonic acid [English name: 4-((4-aminophenyl)amino)-3-nitrobenzenesulfonic acid, molecular formula: C 12 h 11 N 3 o 5 S, molecular weight: 309.30], 30.93g (0.1mol), 2-amino-5-((4-nitrophenyl) amino) benzenesulfonic acid [English name: 2-amino-5-((4-nitrophenyl) amino)benzenesulfonic acid, molecular formula: C 12 h 11 N 3 o 5 S Molecular weight: 309.30], 30.93g (0.1mol), 5-nitro 2 ((nitrophenyl) amino) benzenesulfonic acid [English name: 5-amino-2-((4-nitrophenyl) amino) benzenesulfonic acid , molecular formula: C 12 h 11 N 3 o 5 S molecular weight: 309.30] 30.93g (0.1mol) replaces, and molar dosage remains unchanged; All the other are equal to embodiment 1; Thereby obtain the dyestuff of following chemical structure II-2, II-3, II-4 respectively:

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Abstract

The invention discloses an acid dye used for dyeing nylon fiber. Its general chemical structure formula is: R as a diazo component is an aromatic sulfonic acid group. The present invention also simultaneously provides the preparation method of the above-mentioned acid dye. The acid dye prepared by the invention does not contain heavy metals, and as a new type of acid dye, it has excellent water treatment fastness, excellent light fastness and bright shade for nylon fiber dyeing.

Description

technical field [0001] The invention relates to novel acid dyes, which are used for dyeing and printing nylon fibers (polyamide fibers). Background technique [0002] The dyeing and printing of acid dyes for nylon (polyamide fiber) and protein fiber is a conventional industrial technology. However, to obtain dyed textiles of nylon or protein fibers with excellent wet fastness, excellent light fastness, and bright shade, there are few acid dyes that meet these technical requirements. [0003] Acid metal complex dyes can obtain excellent light fastness, however, metal complex dyes have the following three main defects: [0004] 1. In the production process of acid metal complex dyes, heavy metal salts such as chromium, cobalt, and nickel are used, which will inevitably lead to the discharge of waste water containing heavy metals, which is difficult to treat, and the same problem will also occur in the dyeing process; [0005] 2. The shade of metal complex dyes is darker, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B29/52C09B67/24
CPCC09B29/3669C09B67/0072
Inventor 肖刚徐建成
Owner JINHUA SHUANGHONG CHEM CO LTD
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