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Alkali resistant black active dye suitable for batch cold process

A technology of reactive dyes and dyes, applied in the direction of organic dyes, etc.

Inactive Publication Date: 2006-02-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cannot be directly used for cold pad batch dyeing

Method used

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  • Alkali resistant black active dye suitable for batch cold process
  • Alkali resistant black active dye suitable for batch cold process
  • Alkali resistant black active dye suitable for batch cold process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Mix 144g of methylnaphthalene and 150g of concentrated sulfuric acid, and react at 100°C for 6h in a reaction pot with a good reflux cooling device. Dilute the sulfonate with 150ml of water, add 30g of 36% formaldehyde, react in an autoclave or a reaction pot with a good reflux cooling device at 100°C for 6 hours, add soda lime to neutralize the material after the condensation reaction to neutral to weakly alkaline , filter to remove gypsum, add soda ash to remove gypsum. After the filtrate was evaporated to dryness, about 210 g of alkali resistance additive A1 was obtained.

Embodiment 2

[0057] 85g of the black dye composed of the above-mentioned dyes B1-R1-Y1 and 115g of alkali-resistant auxiliary agent A115g obtained in Example 1 can be compounded by wet or dry method to obtain alkali-resistant black reactive dye. It has good alkali resistance and dyeing performance in cold pad batch.

[0058]

Embodiment 3

[0060] 128g of naphthalene and 130g of concentrated sulfuric acid were reacted for 4 hours at 140°C in a reaction pot with a good reflux cooling device. Dilute the sulfonate with 130ml of water, add 20g of 36% formaldehyde, react in an autoclave or a reaction pot with a good reflux cooling device at 100°C for 4 hours, add soda lime to neutralize the material after the condensation reaction to neutral to weakly alkaline , filter to remove gypsum, add soda ash to remove gypsum. After the filtrate was evaporated to dryness, about 140 g of alkali resistance additive A2 was obtained.

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Abstract

The invention discloses a group of black reactive dyes with good compatibility and alkali resistance, consisting of three primary colors of yellow (orange), red and dark blue, which is prepared through mixing compatible alkaliproof adjuvant of naphthalene sulfonic acids or alkyl naphthalene sulfonic acid-formaldehyde condensate, and is suitable for cellulose base fiber cold rolling stack coloration with the advantages of crow black color, stabilized padding liquor, homogeneous color application, higher alkaliproof stability, fine fixation yield and low soap lotion chromaticity.

Description

technical field [0001] The invention relates to the structure, composition and synthesis process of a multi-component alkali-resistant black reactive dye suitable for cold pad-batch dyeing. After compounding the designed dye structure with alkali-resistant additives, the cellulose fiber is dyed by the cold pad-batch process. Stable pad dyeing solution, excellent color fixation rate, low chroma of soaping solution. The dyed fabric after cold pad batch has good blackness and high fastness. Background technique [0002] Black dye is the most widely used and most productive color in dyes. The pad dyeing method in continuous dyeing has the characteristics of high production efficiency and less waste for large batches of colors. Among them, the cold pad batch process has become the development direction of the current dyeing process because of its energy saving, water saving, high color fixation rate, and low chroma in the dyeing waste liquid. However, the sodium hydroxide and...

Claims

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Application Information

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IPC IPC(8): C09B67/24
Inventor 吴祖望冯柏成王专林莉
Owner DALIAN UNIV OF TECH