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Fiber-reactive copper-complexed disazo dyes

A dye and alkyl technology, applied in the field of fiber-reactive azo dyes, can solve the problems of poor dyeing repeatability, dependence, uneven color lifting force, etc.

Active Publication Date: 2011-12-21
DYSTAR COLOURS DISTRIBUTION GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Known dyes, however, often have certain performance disadvantages, such as, for example, insufficient light fastness or defective or uneven color lift on cotton fabrics (good color lift reflects a dye Capacity, which matches with increasing the concentration in the dyebath to obtain a stronger colored dyeing), or too much dependence on the amount of color given by the fluctuating dyeing parameters during the dyeing process
Possible consequences of these deficiencies include, for example, poor reproducibility of some dyes, which ultimately affects the bottom line of the dyeing operation

Method used

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  • Fiber-reactive copper-complexed disazo dyes
  • Fiber-reactive copper-complexed disazo dyes
  • Fiber-reactive copper-complexed disazo dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0183] 34.1 parts of 2,5-dimethoxy-4-(β-sulfatoethylsulfonyl)-aniline were suspended in 70 parts of ice / water mixture and 18 parts of 30% strength hydrochloric acid, and 17.5 parts of 40 % concentration of sodium nitrite solution for diazotization reaction.

[0184] After removing excess nitrite with sulfamic acid solution, the diazo suspension obtained by the reaction was pumped into an aqueous solution of red monoazo dye (69.1 parts) with formula (16-1), the red monoazo The dye is obtained by diazotizing 36.1 parts of 2-amino-5-(β-sulfatoethylsulfonyl)-benzenesulfonic acid with 17.5 parts of a 40% strength sodium nitrite solution in an acid medium, followed by Obtained by coupling to 25.3 parts of 4-hydroxy-7-(methyl-amino)-naphthalene-2-sulfonic acid at pH 1-1.5.

[0185]

[0186] Subsequently, the pH was set to 5-6 with sodium carbonate at below 25°C, and the mixture was kept for about 1 hour until the coupling reaction was complete. The aqueous solution of the blue-r...

Embodiment 2

[0192] 28.1 parts of 4-(β-sulfatoethylsulfonyl)-aniline were suspended in 70 parts of ice-water mixture and 18 parts of 30% hydrochloric acid, and 17.5 parts of 40% sodium nitrite solution was added dropwise for diazo reaction.

[0193] After removing excess nitrite with sulfamic acid, the resulting diazo suspension was pumped into an aqueous solution of a red monoazo dye (69.1 parts) of formula (16-1), which was By diazotizing 36.1 parts of 2-amino-5-(β-sulfatoethylsulfonyl)-benzenesulfonic acid with 17.5 parts of a 40% strength sodium nitrite solution in an acidic medium, then at pH Obtained by coupling to 25.3 parts of 4-hydroxy-7-(methyl-amino)-naphthalene-2-sulfonic acid under conditions 1-1.5.

[0194] Subsequently, the pH was set to 5 with sodium carbonate at below 25°C, and the mixture was kept for about 1 hour until the coupling reaction was complete. The aqueous solution of the brownish-red disazo dye having the formula (13-2) (which has an absorption maximum at 52...

Embodiment 3

[0200] a) 28.1 parts of 4-(β-sulfatoethylsulfonyl)-aniline are suspended in 70 parts of ice-water mixture and 18 parts of 30% concentration of hydrochloric acid, and 17.5 parts of 40% concentration of sodium nitrite solution are added dropwise. diazotization reaction. After removing excess nitrite with sulfamic acid, the diazonium salt suspension obtained by the reaction was mixed with 33.3 parts of 4-hydroxy-7-(sulfomethyl-amino)-naphthalene-2-sulfonic acid (the 4-hydroxy- 7-(sulfomethyl-amino)-naphthalene-2-sulfonic acid was prepared by 23.9 parts of 7-amino-4-hydroxy-naphthalene-2-sulfonic acid and 15 parts of formaldehyde-sodium bisulfite in an aqueous medium at a pH of 5.5-6, obtained by reaction at a temperature of 45°C), and then adjust the pH to 1.5 with solid sodium bicarbonate. Then, it was stirred under the conditions of pH 1.5 and temperature 15°C-20°C until the acidic coupling reaction was completed.

[0201] b) In a separate reactor, 38 parts of 3-amino-2-hydro...

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Abstract

The present invention relates to dyes of the formula (I), in which R1 to R4, D1, f, and M are defined as indicated in claim 1, to processes for preparing them, and to their use for dyeing and printing hydroxyl- and / or carboxamido-containing materials.

Description

(1) Technical field [0001] The invention relates to the technical field of fiber-reactive azo dyes. (2) Background technology [0002] A large number of documents describe fiber-reactive azo dyes for the dyeing of hydroxyl- and amido-containing materials in violet to blue shades. Known dyes, however, often have certain performance drawbacks, such as, for example, insufficient light fastness or defective or uneven color lift on cotton fabrics (good color lift reflects a dye Capacity, matching with increasing the concentration in the dye bath to obtain a stronger colored dye), or relying too much on the amount of color given by fluctuating dyeing parameters during the dyeing process. Possible consequences of these deficiencies include, for example, poor reproducibility of some dyes, which ultimately affects the bottom line of the dyeing operation. There therefore continues to be a need for new reactive dyes with improved properties, such as easily washable dyes with a combin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/515C09D11/00D06P1/38D06P3/66
CPCC09D11/328C09B62/515C07D213/30C09B45/24C09B62/4401C09B62/4416D06P1/10
Inventor J·艾希霍恩A·施莱尔
Owner DYSTAR COLOURS DISTRIBUTION GMBH