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Reactive dark blue bisazo dye and preparation method thereof

A disazo dye, dark blue technology, used in reactive dyes, azo dyes, dyeing methods, etc., can solve the problems of insufficient lifting force and levelness, poor washing fastness, low color fixing rate, etc. The effect of deep dyeing ability, low soaping loss rate and good binding stability

Active Publication Date: 2012-06-20
吴江桃源染料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of society and the continuous improvement of people's quality of life, the existing products in the dyeing industry, such as Reactive Blue 194 (Reactive Blue 194), Reactive Blue 222 (Reactive Blue 222), etc., have been difficult to meet the market's various requirements for dyeing quality , these blue dyes have problems such as low fixation rate, poor reactivity, insufficient lifting power and level dyeing, and poor washing fastness.

Method used

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  • Reactive dark blue bisazo dye and preparation method thereof
  • Reactive dark blue bisazo dye and preparation method thereof
  • Reactive dark blue bisazo dye and preparation method thereof

Examples

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preparation example Construction

[0022] The active dark blue disazo dye of the present invention is prepared with reference to the existing conventional technology in this field, and the preparation method and process are simple to operate, and specifically include the following steps:

[0023] (1) Compound A is diazotized in the presence of hydrochloric acid and sodium nitrite, and the obtained diazotized product is acid-coupled with compound B to obtain compound (1); the reaction route is shown in formula II:

[0024]

[0025] II

[0026] (2) Compound C and compound D undergo dehydrohalogenation condensation reaction, and the obtained condensation product is further subjected to dehydrohalogenation condensation reaction with compound E to obtain compound (2); the reaction route is shown in formula III:

[0027]

[0028] III

[0029] (3) After diazotization of the amino group of compound (2) obtained in step (2) and acidic coupling with compound (1) obtained in step (1), the reactive dark blue disazo ...

Embodiment 1

[0034] (1a), suspend 28.1g 4-(β-sulfatoethylsulfonyl)aniline in 200g water, wash with saturated NaHCO 3 (aq) Adjust the solution to neutral, dissolve 4-(β-sulfatoethylsulfonyl)aniline in water, then cool the solution to 0°C; add 7g of sodium nitrite, 50g of water to the solution And 30g concentrated hydrochloric acid, carry out diazotization reaction 2 hours. Then, use sulfamic acid to consume excess nitrite.

[0035] (1b), add dropwise 31.9g of 1-amino-8-hydroxynaphthalene-3,6 disulfonic acid to the solution after step (1a) (this acid is preferably pre-dissolved in 300g of water, and neutralized to neutral with alkali) , carry out the coupling reaction at a temperature of 5°C-15°C for 4-8 hours, and the structural formula of the obtained product is as follows:

[0036]

[0037] (2a) Dissolve 30.9g of N-2-(2-ethylsulfone sulfate)ethylaniline in 100g of water, adjust the pH to neutral, add dropwise 19.5g of N-2-(2-ethylsulfone sulfate) ethylaniline dissolved in 80g of a...

Embodiment 2

[0046] In this example, a reactive dark blue disazo dye (Ib) with the following structural formula was obtained. The preparation method was the same as in Example 1, except that the same molar equivalent (i.e. 15.5g) of cyanuric fluoride was used instead of cyanuric fluoride in step (2a). Uric acid chloride.

[0047]

[0048] The reactive dark blue disazo dye (Ib) prepared in this example is also a dark blue powder with a maximum absorption wavelength λmax=610nm in water, showing a dark blue color.

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Abstract

The invention relates to a reactive dark blue bisazo dye having a structural formula shown in the formula (1), wherein R1 and R2 are selected from -H, CH3 (CH2)n-, CH3(CH2)n-O-, -COOH or -SO3H and n is between 0 and 3; R3 is can be -CH2CH2- or -CH2CH2CH2-; R4 can be -CH2CH3 or -CH2CH2-W and W is an acid radical or halogen element; X is a halogen element; Z1 is -CH2-CH2-U and U is an acid radical or halogen element; and Z2 can be phenyl, tolyl, naphthyl or naphthyl sulfonyl. The dye provided by the invention has high reactivity, excellent color fixation and excellent deep dyeing property and good stability of combination with fiber fabric, and the fabric dyed with the reactive dark blue bisazo dye has excellent light fastness, humidity resistance and acid-base-resistance fastness; in addition, the invention relates to a preparation method of the dye and the application of the dye in fabrics such as cotton.

Description

technical field [0001] The invention belongs to the field of reactive dyes, and in particular relates to a reactive dark blue disazo dye and a preparation method thereof. Background technique [0002] Disazo reactive dyes are very common reactive dyes for fibers. See many patent reports about these dyes, such as CN 1273545C (mixture of reactive azo dyes for fibers), CN1279702A (reactive disazo dyes), CN1422907A (fiber reactive dyes). disazo mixtures and their uses). With the development of society and the continuous improvement of people's quality of life, the existing products in the dyeing industry, such as Reactive Blue 194 (Reactive Blue 194), Reactive Blue 222 (Reactive Blue 222), etc., have been difficult to meet the market's various requirements for dyeing quality , These blue dyes have problems such as low color fixation rate, poor reactivity, insufficient lifting power and level dyeing, and poor washing fastness. Therefore, it is of great practical significance to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/513D06P1/384D06P3/66D06P3/58D06P3/24D06P3/34D06P3/14D06P3/10
Inventor 薛伟郭正祥陆海英陆再宏庄永祥
Owner 吴江桃源染料有限公司
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