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Weather-resistant azo-dyes, preparation and use thereof

A technology of azo dyes and weather resistance, which is applied in the preparation of azo dyes, azo dyes, monoazo dyes, etc., can solve the problem of affecting the dyeing performance of azo dyes, easy to decompose, heat resistance, and poor color fastness to light Waiting for a question

Inactive Publication Date: 2008-10-08
上海汇友精密化学品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, especially when the color fastness of azo dyes is not good, or when the color fastness to heat and light is not good, it is easy to decompose under the action of the external environment, causing the dyed object to fade, etc., which affects the dyeing of azo dyes performance

Method used

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  • Weather-resistant azo-dyes, preparation and use thereof
  • Weather-resistant azo-dyes, preparation and use thereof
  • Weather-resistant azo-dyes, preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] a) Add 40g of water, 0.8g of wetting agent and 60g of ice into a 500mL reaction flask, control the temperature at 0-1°C with an ice-salt bath, and stir rapidly; then add 18.6g of cyanuric chloride (99%, MW=184.5 , 0.10mol), stirred rapidly for 30 minutes, ground cyanuric chloride in ice-water mixture, and controlled the temperature at 0-1°C. The product is a white suspension.

[0065] b) Add 27.5g of water and 1.8g of NaHCO to a 100mL beaker 3 And 16.3g DSD acid (96.68%, MW=370.41, 0.0425mol), stir well; Then add NaHCO carefully 3 Adjust the pH to 6.5-6.8, stir until the DSD acid is completely dissolved, add a small amount of antifoaming agent to defoam; add 20g of ice to it and cool down to 0-5°C, pH = 6.5-7.0.

[0066] c) Add the DSD acid solution in the above second step b) dropwise to the cyanuric chloride solution to carry out the first condensation reaction, the dropping time is controlled at about 1h, and the reaction temperature is controlled at 0-3 with an ic...

Embodiment 2

[0078] As in Example 1, take by weighing 18.6g cyanuric chloride and successively with 16.3g DSD acid, 29.0g H acid monosodium salt and 13.3g 4-amino-2,2,6,6-tetramethylpiperidinamine ( TAD) condensation, and the triple condensate is coupled with 7.9g aniline diazonium salt to obtain the weather-resistant azo dye of the general formula (1) of the present invention.

Embodiment 3

[0080] As in Example 1, 18.6g of cyanuric chloride was weighed successively with 13.3g of 4-amino-2,2,6,6-tetramethylpiperidinamine (TAD), 29.0g of H acid monosodium salt and 16.3g of DSD acid condensation, the triple condensate is coupled with 7.9 g of aniline diazonium salt, and the weather-resistant azo dye of the general formula (1) of the present invention is obtained.

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Abstract

The invention relates to a weather-resistant azo dye with the following general formula (I) and the preparation method and application. The invention introduces chlorinated triazine groups based on common azo dyes and then after a series of condensation reactions, a novel azo dye is obtained. The azo dye contains multiple chromogenic groups, wherein, hindered amine can absorb the infrared; DSD acid (that is, 4,4'-diaminostilbene-2,2'-disulfonic acid) can absorb the ultraviolet rays; therefore, the azo dye has good light-resistant and weather-resistant properties and can be used alone or with other dyes; the azo dye can be used in textiles, paper, leather, wood, ink-jet printing ink and other aspects, which is also a good energy transfer agent. As a result of a variety of functional groups, the azo dye of the invention has better weather-resistant performance than common azo dyes.

Description

technical field [0001] The invention relates to an azo dye and a preparation method thereof, in particular to a weather-resistant azo dye and its preparation method and application. Amine 4-Z-2,2,6,6-tetramethylpiperidinamine to improve the light stability of azo dyes, thereby improving their weather resistance. Background technique [0002] As we all know, in the molecular structure of dyes, all those containing azo group (-N=N-) are collectively called azo dyes, in which the azo group is often connected with one or more aromatic ring systems to form a conjugated system as the hair of the dye. Chromosomes, distributed in almost all colors, are widely used in dyeing and printing processes such as textiles and leather products. However, especially when the color fastness of azo dyes is not good, or when the color fastness to heat and light is not good, it is easy to decompose under the action of the external environment, causing the dyed object to fade, etc., which affects t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B43/00C09B29/02C09B29/30D06P1/04D21H21/28C09D15/00C09D11/00C09D11/328
Inventor 黄胜梅俞伯洪
Owner 上海汇友精密化学品有限公司
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