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Dark black active dyestuff having high colour fixing rate

A technology of reactive dyes and three primary colors, applied in organic dyes, dyeing methods, textiles and papermaking, etc., can solve the problems of high chroma of dyeing residue, affecting economic benefits, dye residues, etc.

Inactive Publication Date: 2007-02-14
大连华成中瑞科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But the main deficiency of above-mentioned dyestuff is that the fixation rate of dyestuff is only 60~65%, the chromaticity of dyeing raffinate is high, and a large amount of unfixed and hydrolyzed dyestuffs remain in dyeing effluent, not only influence economic benefit, but also cause environmental pollution

Method used

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  • Dark black active dyestuff having high colour fixing rate
  • Dark black active dyestuff having high colour fixing rate
  • Dark black active dyestuff having high colour fixing rate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Mix 0.1mol of para-ester (compound 01) and 0.13mol of sulfuric acid, add 350g of ice-water mixture, beat for 30min, and drop 30% NaNO from below the liquid surface at 0-5°C 2 Solution 0.1mol, keep NaNO during dropwise addition and reaction 2 excess. After diazotization to the end point, excess NaNO 2 Destroy with sulfamic acid.

[0079] Add 0.1 mol of 1-amino-8-naphthol-3,6-disulfonic acid (H acid) solution to the above diazonium salt, and carry out acidic coupling at 5-8°C. After the reaction is completed, add the diazonium salt of 6-sulfate hydroxyethylsulfonyl-2-naphthylamine-1-sulfonic acid (compound 14) dropwise to the above-mentioned acidic coupling monoazo dye reaction solution, and maintain 10°C and pH 6~6.5 Respond to the end point. The navy blue component dye 105 was obtained after membrane separation to remove salt and spray drying.

Embodiment 2

[0081] Add 15g sodium hydroxymethanesulfonate to 10% J acid solution (0.1mol), and react at below 50°C for 4h to obtain 2-sulfomethylamino-5-naphthol-7-sulfonic acid solution. Add 0.1mol para-ester diazonium salt solution to the above coupling components, control the pH ≤ 2, and couple at 0-5°C until the reaction is complete; adjust the pH to 5-6 and then add 0.1mol 2-methoxy-4- The diazonium salt of sulfate ethyl sulfone aniline is added dropwise to the monoazo dye, and the pH is controlled at 6-6.5. After the secondary coupling reaction is completed, desalination and spray drying are performed to obtain reddish-brown powdery red component dye 302.

Embodiment 3

[0083] Add 0.5 part of methylnaphthalenesulfonic acid formaldehyde condensates as dispersant in 0.1mol anthranilic acid diazonium salt solution, after stirring, join the 3,5-diaminobenzoic acid sodium (0.1mol ), a coupling was performed at 5°C. Control the pH of the reaction solution to ≤3 until the primary coupling is complete. Add 0.2 mol para-ester diazonium salt solution dropwise to the primary coupling solution, and gradually increase the pH to 6-6.2 at room temperature until the reaction is complete. Salt out, dry and pulverize to obtain the brown-yellow-brown yellow component dye 501.

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Abstract

The invention provides an dark black reactive dye having high color fixation rate and compounded of three-primary color components: dark blue, fuchsine and orange components and the synthesizing method thereof, where the weight percents of the navy, fuchsine and orange components are (40-85)%, (5-30)%, and (5-25)%, respectively. And it has characters: it has very high blackening; color fixation rate up to above 80% at standard color and cplor of dyeing liquor residue is low, having good environmental benefits; dyeing curves of component to fiber are completely consistent; the dyed fabrics have good color uniformity. And it is especially applied to exhaustive dyeing of fibrin, protein fibre and polyarmide fiber.

Description

technical field [0001] The invention relates to reactive dyes in the field of fine chemicals. Background technique [0002] Black reactive dyes are the most widely used and produced varieties of dyes. Since the 21st century, a large number of reactive black patents have come out, but so far, the vast majority of commercial reactive dyes still use C.I. reactive black. Such as Cibacron Black WNN, Cibacron Supra Black G, Cibacron Supra Black R, etc. The advantages of these dyes are not only the better blackness of the dyed fabrics, but also the dyeing curves of the three primary colors have the same trend, and the compatibility is better. Related patents include CN200510047135.4, CN200510047136.9, WO2004069937, US6537332, USP5849887 and so on. [0003] [0004] B1 C.I. Reactive Black 5 [0005] But the major deficiency of above-mentioned dyestuff is that the fixation rate of dyestuff only has 60~65%, and the chromaticity of dyeing raffinate is hi...

Claims

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Application Information

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IPC IPC(8): C09B67/24D06P1/38D06P3/58D06P3/10
Inventor 吴祖望王专冯柏成林莉
Owner 大连华成中瑞科技有限公司
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