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Acidic dye for polyamide fiber dyeing and preparation method thereof

A technology of acid dyes and nylon fibers, applied in azo dyes, organic dyes, monoazo dyes, etc., can solve problems such as dark color of metal complex dyes, human health hazards, non-bright fibers, etc., to solve the problem of heavy metals on the environment The effect of pollution, bright shade, excellent wet fastness

Active Publication Date: 2020-03-13
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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  • Acidic dye for polyamide fiber dyeing and preparation method thereof
  • Acidic dye for polyamide fiber dyeing and preparation method thereof
  • Acidic dye for polyamide 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: 364.46] preparation method, followed by the following steps:

[0043] 1) Synthesis of 2-(diethylamino)-6-methyl-4-pyrimidinol

[0044] In 250mL of water, slowly add nitric acid (9.45g, 0.15mol) dropwise (dropping time is about 10 minutes), and then dropwise add diethylamine (10.22g, 0.14mol) (dropping time about 30 minutes), stirring 1.5 After h, cyanamide (12.60g, 0.3mol) was added dropwise (dropping time is about 30 minutes), and then the temperature was raised to 75°C and reacted for 5 hours. Immediately after the reaction, the temperature of the reactant was cooled to below 5°C with an ice water bath, cooled to precipitate, filtered, and the filter cake was dried at 80°C to a 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 control the temperature at 30°C, add 20.80g (0.16mol) of ethyl aceto...

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) dissolved in 400ml of water, adjust pH=7.5 with 10% (mass%) sodium hydroxide aqueous solution, add 7g (0.104mol) of sodium nitrite and stir until the dissolution is complete, ice bath Cool down to 0°C, then add to a solution consisting of 200g crushed ice and 26g 30% (0.21mol) hydrochloric acid. The addition time is 30 minutes. During the addition, the temperature is controlled to 0~5℃. After the addition is completed, the temperature is 0~5℃. Keep the temperature and stir for 60 minutes, the diazotization is completed, and the obtained diazonium salt solution is ready for use.

[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)benzenesulfonic...

Embodiment 2～4

[0061] The 2-((4-aminophenyl)amino)-5-nitrobenzenesulfonic acid in the step 1) of Example 1 was separately used with 3-nitro-4-(4-aminophenylamino)benzenesulfonic acid [English name: 4-((4-aminophenyl)amino)-3-nitrobenzenesulfonicacid, 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 (0.1 mol) instead, the molar amount remains unchanged; the rest is the same as in Example 1; thus, the following dyes with chemical structures II-2, II-3, and II-4 are obtained:

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Abstract

The invention discloses an acidic dye for polyamide fiber dyeing. The chemical structure general formula of the acidic dye is shown in the specification, wherein R serving as a diazonium component isan aromatic sulfonic acid group. The invention also provides a preparation method of the acidic dye. The acidic dye prepared by the invention contains no heavy metal, and has excellent water treatmentfastness, excellent light fastness and bright color light when being used as a novel acidic dye for dyeing polyamide fibers.

Description

Technical field [0001] The invention relates to a novel acid dye, which is used for the dyeing and printing of nylon fibers (polyamide fibers). Background technique [0002] The use of acid dyes in the dyeing and printing of nylon (polyamide fibers) and protein fibers is a conventional industrial technology. However, in order to obtain dyed textiles of nylon or protein fibers with excellent wet treatment fastness, excellent light fastness, and bright color, 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. The use of chromium, cobalt, nickel and other heavy metal salts in the production process of acid metal complex dyes will inevitably cause the discharge of waste water containing heavy metals, which is difficult to manage, and the same problems will occur in the dyeing process; [0005] 2. The shade of metal complex dyes ...

Claims

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Application Information

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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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