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Bisdiazo metal complex dye and its preparation method

A technology of metal complex dyes and disazo, which is applied in the direction of azo dyes, azo dye complex metal compounds, organic dyes, etc., can solve the problems of poor performance such as perspiration fastness and poor color fixation rate, etc. Achieve the effect of excellent light fastness and wet fastness, high color fixation rate, simple and reliable dyeing process

Inactive Publication Date: 2009-06-24
ZHEJIANG LONGSHENG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current conventional acid black dyes cannot well meet the above requirements, mainly in: poor color fixation rate, resulting in poor water resistance, washing resistance, perspiration fastness, etc. Ester fibers cannot be colored in dark black

Method used

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  • Bisdiazo metal complex dye and its preparation method
  • Bisdiazo metal complex dye and its preparation method
  • Bisdiazo metal complex dye and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the first step, the 6-nitro-1,2,4-acid oxygen body is coupled with 2-naphthol:

[0023] Take 20 grams of 6-nitro-1,2,4-acid oxygen, as shown in (VI-a), add 60ml of water to make a slurry, add ice to cool to 8°C, and adjust the pH of the feed solution with 10ml of 30% liquid caustic soda Values ​​up to Congo red do not appear blue. Add 10.5 grams of 2-naphthol to 7ml of water, add 8.5ml of 30% liquid caustic soda, heat up to 80°C to dissolve 2-naphthol, cool the solution to 30°C, and then flow into the above 6- In the nitro-1,2,4-acid oxygen body solution, under vigorous stirring, raise the temperature to 40°C within 1 hour, adjust the pH value to 8.5 with hydrochloric acid to carry out the coupling reaction, after the reaction, filter, wash with water, and dry , 26 grams of dry product of the coupled compound shown in the following formula (VII-a) were obtained.

[0024] In the second step, the coupling compound prepared in the first step is complexed with chromium...

Embodiment 2

[0035] Prepare according to the same method as in Example 1, except that the following formula (VI-b) is used instead of the above (VI-a), and the monoazo compound of formula (VII-b) and formula (II-b) are successively prepared. Chromium complexes, azo metal complex acid black dyes of formula (I-b).

[0036]

[0037]

Embodiment 3～6

[0039] According to the preparation method of Example 1, using the monoazo complexes and azo compounds listed in Table 1 below, azo metal complex acid black dyes with corresponding structures were prepared.

[0040] Table 1

[0041]

[0042]

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Abstract

The invention relates to a disazo metal complex dye and a preparation method thereof. The dye is represented by the formula (I), and the preparation method comprises the following steps: combining the compound of the formula (II) with the compound of the formula (III) Mix, adjust the pH to 6.0-10.0, raise the temperature to 60-90°C, stir and react, and post-process to obtain the product. The acid black metal complex dye of the present invention is suitable for dyeing wool and its blends, silk and nylon, and the dyeing process is simple and reliable, especially suitable for low-temperature dyeing of wool loose fibers and tops, with high color yield, light fastness and wet fastness Excellent, also suitable for dyeing automotive interior textiles.

Description

(1) Technical field [0001] The invention relates to a disazo metal complex dye and a preparation method thereof. (2) Background technology [0002] Acid complex black is mainly used in the dyeing and printing of wool, silk and nylon, and can be used alone or in color matching applications. According to EU regulations: when acid metal complex dyes are used for dyeing related fibers, the amount of dye liquor discharged into wastewater for treatment should be less than 7%, that is, the coloring rate of metal complex dyes should exceed 93%. The current conventional acid black dyes cannot well meet the above requirements, mainly in: poor color fixation rate, resulting in poor water resistance, washing resistance, perspiration fastness, etc. Ester fibers cannot be colored in dark black. Chinese patent ZL01802267.7 discloses an asymmetric disazo metal complex dye with excellent high color depth and fastness. (3) Contents of the invention [0003] The purpose of the present inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B45/26
Inventor 阮伟祥欧其张云保陈建平郑伟良
Owner ZHEJIANG LONGSHENG GROUP
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