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Dark brown reactive dye

A compound and selected technology, applied in the direction of reactive dyes, azo dyes, organic dyes, etc., can solve the problem of inability to meet the needs of high color strength and high color fastness, and achieve good dyeing reproducibility and good color fastness. Effect

Inactive Publication Date: 2013-07-17
EVERLIGHT CHEMICAL INDUSTRIAL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these dyes still cannot meet the requirements of high color strength and high color fastness, especially in deep concentrations

Method used

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  • Dark brown reactive dye
  • Dark brown reactive dye
  • Dark brown reactive dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] (a) disperse 31.9 parts by weight of 4-amino-5-naphthol-2,7-disulfonic acid (4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid) in 100 parts by weight of water, with 45 % liquid caustic soda to adjust the pH to be 7 to 9 to dissolve, add ice to cool to 0°C, add 34 parts by weight of 32% hydrochloric acid aqueous solution to disperse for 30 minutes, add 7.2 parts by weight of sodium nitrite, and control the temperature at 0 to 5°C until The diazotization reaction is complete, and excess sodium nitrite is removed with urea for later use.

[0107] (b) Get 15.2 parts by weight of 3,5-diaminobenzoic acid (3,5-diaminobenzoic acid) and 200 parts by weight of water to fully disperse, add to the above (a) reaction solution, add sodium carbonate to slowly adjust the reaction pH value Reach 3~7, after reacting for 3 hours, a brown product is obtained for future use.

[0108] (c) At 0°C, add 56.2 parts by weight of p-(β-sulfatoethylsulfone) aniline (4-(β-sulfatoethylsulfone) anilin...

Embodiment 2

[0112] (a), (b): Carry out the steps as (a) and (b) in Example 1.

[0113] (c) At 0°C, add 62.2 parts by weight of 2-amino-1-methoxy-4-(β-ethyl sulfate sulfone group) benzene (2-amino-1-methoxy- 4-(β-sulfatoethylsulfonyl)benzene) and 51.2 parts by weight of 32% hydrochloric acid aqueous solution, after fully stirring to form a dispersed solution, add 14.4 parts by weight of sodium nitrite, and control the temperature at 0 ~ 5 ° C until the diazotization reaction complete, add the reaction solution obtained in (b) above, slowly adjust the reaction pH value to 4-8 with sodium carbonate, and obtain a brown product after reacting for 3 hours.

[0114] (d) Get 19.9 parts by weight of 2-amino-4,6-dinitrophenol, stir and disperse in 100 parts by weight of water, add 34 parts by weight of 32% aqueous hydrochloric acid, add 7.2 parts by weight of sodium nitrite, and control the At a temperature of 0-5°C, until the diazotization reaction is complete, remove excess sodium nitrite with u...

Embodiment 3

[0117] (a), (b): Carry out the steps as (a) and (b) in Example 1.

[0118] (c) at 0°C, add 56.2 parts by weight of m-(β-sulfatoethylsulfone) aniline (3-(β-sulfatoethylsulfone) aniline) and 51.2 parts by weight of 32% hydrochloric acid aqueous solution in 600 parts by weight of water, fully After stirring to form a dispersed solution, add 14.4 parts by weight of sodium nitrite, and control the temperature at 0 to 5°C until the diazotization reaction is complete, add the reaction solution obtained in (b) above, and slowly adjust the reaction pH with sodium carbonate The value reaches 4-8, and the brown product is obtained after reacting for 3 hours.

[0119] (d) Get 19.9 parts by weight of 2-amino-4,6-dinitrophenol, stir and disperse in 100 parts by weight of water, add 34 parts by weight of 32% aqueous hydrochloric acid, add 7.2 parts by weight of sodium nitrite, and control the At a temperature of 0-5°C, until the diazotization reaction is complete, remove excess sodium nitri...

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PUM

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Abstract

The invention has the title of dark brown reactive dye. The invention provides a compound as described in formula (I), and symbols in the formula are defined as in the description. The compound can be used as a dye, has good color stability (e.g. daylight fastness, sweat fastness, water washing fastness, friction fastness, permeability, etc.), can be used for producing products having excellent dyeing reproduction performance (especially in dark concentration). As a result, the dark brown reactive dye is in accord with economic effectiveness and helps to reduce loss of energy.

Description

technical field [0001] The invention relates to a reactive dye, in particular to a brown reactive dye suitable for leather. Background technique [0002] Generally, brown dyes are obtained by mixing dyes of three primary colors (red, yellow, blue). However, the compatibility between dyes must be taken into account when matching colors. If the compatibility is not good, the dyeing quality will be affected. In addition, when dyeing leather with three primary color dyes, it is easy to cause uneven color of the leather due to uneven dye penetration. Based on this, the industry has gradually developed various brown dyes to avoid the above-mentioned problems and reduce the increased cost due to color correction and remanufacturing. [0003] Dyes can be divided into direct dyes, acid dyes (including acid gold-containing dyes), basic / cationic dyes, and disperse dyes according to their application characteristics. ), reactive dyes, sulfur dyes, etc. Tanned leather is usually dyed ...

Claims

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Application Information

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IPC IPC(8): C09B62/513C07C317/34
Inventor 郑敏精张庭瑞叶福明
Owner EVERLIGHT CHEMICAL INDUSTRIAL CORPORATION
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