K-type active light-resistant red azo dye and preparation method thereof

An azo dye and reactive technology, which is applied in the field of K-type reactive lightfast red azo dye, can solve the problems of low dye utilization rate, low wet rubbing fastness of dyed fabrics, low light fastness to sunlight, etc.

Inactive Publication Date: 2010-12-15
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the application process of reactive dyes, the shortcomings of low dye utilization rate, we...

Method used

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  • K-type active light-resistant red azo dye and preparation method thereof
  • K-type active light-resistant red azo dye and preparation method thereof
  • K-type active light-resistant red azo dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1, the synthesis of reactive light fast red KA

[0011] 1. Preparation of cyanuric chloride and H acid condensation reaction solution

[0012] In a 250mL four-necked flask equipped with a stirrer, dropping funnel and thermometer, respectively add 15g of crushed ice, 10mL of water and 0.011mol of cyanuric chloride for beating at 0°C for 30 minutes, then dropwise add pH=7 within 1 hour ~8 H acid solution with a H acid content of 0.01mol. After the addition, keep the pH value of the reaction solution at 2~3, continue to stir and react at 5~8°C for 3 hours, and use an amino indicator to detect the presence of H acid in the solution. Afterwards, stop the reaction and filter to obtain a clarified condensate for later use. The reaction formula is as follows:

[0013]

[0014] 2. Preparation of p-aminobenzenesulfonic acid diazonium salt solution

[0015] Add 10mL of water and 0.01mol of p-aminobenzenesulfonic acid into a 100mL beaker, start stirring, neutralize...

Embodiment 2

[0023] Embodiment 2, the synthesis of active photostable red KB

[0024] The molecular structure formula of reactive photostable red KB is as follows:

[0025]

[0026] The preparation process of active light fast red KB is the same as embodiment 1, just the p-aminobenzenesulfonic acid in embodiment 1 is replaced with m-aminobenzenesulfonic acid; 4-(4-aminobenzoate group)-2,2, Reactive photostable red KB can be obtained by replacing 6,6-tetramethylpiperidine with 4-(4-aminobenzamido)-1,2,2,6,6-pentamethylpiperidine.

Embodiment 3

[0027] Embodiment 3, the synthesis of reactive light fast red KC

[0028] 1. Preparation of cyanuric chloride and H acid condensation reaction solution

[0029] The preparation process of cyanuric chloride and H acid condensation reaction liquid is with embodiment 1.

[0030] 2, Preparation of 4-(4-aminobenzoate group)-2,2,6,6-tetramethylpiperidine diazonium salt solution

[0031] Add 30mL of water, 0.01mol of 4-(4-aminobenzoate)-2,2,6,6-tetramethylpiperidine, 3.5mL of 30% hydrochloric acid into a 150mL beaker, and start stirring to make the amino compound completely Dissolve and cool to 0°C in an ice-water bath. Dissolve 0.0105 mol of sodium nitrite in 2 mL of water, cool to 0°C in an ice-water bath, quickly add to the amino compound, keep the pH of the reaction solution below 3 after the addition, and continue to stir the reaction at a temperature lower than 5°C, after 2 hours The diazotization reaction is complete, and now the reaction solution is blue to the Congo red t...

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Abstract

The invention discloses a K-type active light-resistant red azo dye and a preparation method thereof. A molecular structure of the active dye comprises hindered amine groups. Compared with active brilliant red K-G, the dyeing property and various wet processing fastness of the active dye are close to that of the active brilliant red K-G, the active dye and the active brilliant red K-G both have higher dying rate and higher fixing rate, but the sunlight resistance fastness of the active dye is obviously increased.

Description

technical field [0001] The invention relates to an organic dye, in particular to a K-type reactive light-fast red azo dye. Background technique [0002] Because of their bright color, wide color spectrum, excellent fastness, simple application process and low price, reactive dyes have developed into a type of dye with the highest utilization rate for natural fiber dyeing, and it is also a type of dye with the fastest development in recent years. However, during the application process of reactive dyes, the shortcomings of low dye utilization rate, wet rubbing fastness of dyed fabrics and relatively low light fastness of light-colored varieties are also exposed. How to overcome these shortcomings of reactive dyes has become a key topic in the research and development of reactive dyes. Contents of the invention [0003] The purpose of the present invention is to provide a kind of K-type reactive light-fast red azo dye, which has better photo-oxidation resistance, and can ma...

Claims

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Application Information

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IPC IPC(8): C09B43/32
Inventor 张晓东栾吉梅刘馨
Owner QINGDAO UNIV
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