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Monoazo reactive red dyestuff

A reactive dye, red dye technology, used in azo dyes, reactive dyes, organic dyes, etc.

Inactive Publication Date: 2004-05-05
EVERLIGHT CHEMICAL INDUSTRIAL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, U.S. Patent No. 5,227,475 once disclosed that the fiber-reactive dye of the following formula (II) is helpful to the improvement of dyeing quality and dyeing efficiency. It has the dyeing characteristics and fastness characteristics of ordinary dyes on fibers, but The light fastness and perspiration light fastness of red fiber reactive dyes still need to be improved

Method used

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  • Monoazo reactive red dyestuff
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  • Monoazo reactive red dyestuff

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preparation example Construction

[0058] The preparation of the compound of formula (I) of the present invention can be synthesized by known methods, for example, the synthesis method of the following step (a) to step (c) can prepare the monoazo reactive dye of formula (I).

[0059] Step (a), at first with the azo dye masterbatch of following (III) and the trihalogen triazine (trihalogen triazine) compound of following formula (IV) at pH value 3-7

[0060]

[0061] Reaction at a temperature of 0-30°C, preferably below 20°C, can give the compound of formula (V), wherein Hal is a halogen, such as fluorine, chlorine or bromine atom.

[0062] Step (b), when X is not a halogen, then the compound of formula (V) and the compound of formula (VI) are mixed at a pH value of 4 to 12, preferably, a pH value of 6 to 10 and a temperature of 20-80 ℃, preferably, react at a temperature of 40-60,

[0063]

[0064] Compounds of formula (VII) can be obtained, wherein X can be -NHCN, -OH, -SCH 2 COOH,-HSO 2 CH 3 , 3-car...

Embodiment 1

[0096] Dissolve and disperse 21.8 parts of 4-nitroaniline-2-sulfonic acid and 21.7 parts of 35% sodium nitrite solution in 150 parts of water, then add it to glacial acid water containing 300 parts of ice water and 35.5 parts of concentrated hydrochloric acid , and then continued to stir until the diazotization was completed.

[0097] Next, 31.9 parts of 2-amino-8-hydroxynaphthalene-3,6-disulfonic acid were added thereto, and the mixture was stirred at room temperature until the coupling reaction was completed. Then, the pH value of the reaction mixture was adjusted to 8 to 10, and then mixed with 10.7 parts of sodium sulfide, and the mixture was heated to 60° C. and maintained until the reduction was completed.

[0098] Then 40 parts of sodium chloride was added to the reaction mixture, which was then filtered and rinsed. Disperse the above filtrate in 400 parts of ice water, add 16.7 parts of cyanuric chloride to it, stir the mixture at 0 to 10°C, and keep the pH value in the...

Embodiment 2

[0101] Add 27.8 parts of 1-N-ethylaminobenzene-3-β-sulfate group ethanesulfonyl to the mixture (A), and heat to 55°C and keep the pH value from 4 to 5 until the reaction is completed Salt-out filtration can obtain formula (2) compound, (λ max =525nm),

[0102]

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Abstract

A reactive red monoazo dye for cotton, artificial cotton, bast fibre, wool, silk and artificial fibres is disclosed. Its advantages are high washing off properties, dyeing uniformity and fastness.

Description

technical field [0001] The technical field of the present invention relates to fiber-reactive dyes, especially to a novel monoazo-reactive red dye. Background technique [0002] When dyeing with fiber reactive dyes, high quality dyed goods and economical dyeing process are highly expected. Therefore, it is required by the industry to have novel fiber-reactive dyes to continuously improve their quality. Especially reactive dyes for dyeing red high fastness characteristic dyes. In British Patent No. 836,248, U.S. Patent No. 2,979,498, and European Patent Publication No. 0 070 806, several red fiber-reactive dyes have been disclosed, but the dye fastness characteristics obtained by using these dyes, especially sunlight The fastness and the fastness to sweat and light need to be improved. [0003] In addition, U.S. Patent No. 5,227,475 once disclosed that the fiber-reactive dye of the following formula (II) is helpful to the improvement of dyeing quality and dyeing efficiency...

Claims

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Application Information

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IPC IPC(8): C09B62/085D06P1/02D06P3/60
Inventor 黄惠卿游家惠
Owner EVERLIGHT CHEMICAL INDUSTRIAL CORPORATION