Dark colored reactive dye with high fixation rate

Abstract

The invention relates to a dark colored reactive dye with high fixation rate, belonging to the technical field of chemical dyestuff. The dark colored reactive dye consists of dark blue, red and yellow reactive dyes. The dye is characterized by comprising dark blue, red and yellow components in structures shown in general formulae. The three-primary-color reactive dye comprises the following components in ratio by weight: dark blue: red: orange=(50-80):(6-25):(6-20). The dark colored reactive dye provided by the invention is applicable to dyeing natural fibers such as cotton, hemps and regenerated fibers and is also applicable to dyeing protein fibers and polyamide fibers. The textile fibers can be in various forms such as fibers, yarns, fabrics or knitted goods. Dip dyeing means that the dyed object is absorbed in a dye bath with an appointed formula and then is fixed by alkali treatment, wherein the dyeing and fixing temperature is 50-70 DEG C. The leveling property of the dye is better promoted, the three components are good in compatibility, the colored light in a dyeing process is relatively stable, and the dye has good pitch-black degree.

Description

technical field

[0001] The invention relates to the technical field of chemical dyes, in particular to a reactive dye in the fine chemical industry. 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, 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] However, the main deficiency of the above-mentioned dyes is that the fixation rate of the dyes is only 60% to 65%, the chroma of the dyeing residue is high, and a large amount of ...

Examples

Embodiment 1

[0051] Mix 0.1mol of para-ester (compound 01) and 0.15mol of hydrochloric acid, add 350g of ice-water mixture, beat for 30min, add 30% NaNO dropwise from the liquid surface at 0~5℃ 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.

[0052] Add 0.1mol-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 0.1 mol of 2.4-bis(β-hydroxyethylsulfonyl sulfate) aniline diazonium salt dropwise to the above-mentioned acidic coupling monoazo dye reaction solution, and maintain 10°C and PH6~6.5 to react to the end . The navy blue component dye 101 was obtained after membrane separation to remove salt and spray drying.

Embodiment 2

[0054] Add 15g of sodium methanesulfonate to 10% J acid solution (0.1mol), and react at below 50°C for 4 hours to obtain 2-sulfomethylamino-5-naphthol-7-sulfonic acid solution. Add 0.1 mol para-ester diazonium hydrochloric acid solution to the above coupling components, control pH ≤ 2, and couple at 0-5°C until the reaction is complete. Add 0.2mol para-ester diazonium salt solution dropwise to the above-mentioned 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 get the yellow component dye 301.

Embodiment 4

[0056] 45 parts of dye (101), 15 parts of dye (202), 12 parts of dye (301) and 10 parts of naphthalenesulfonic acid formaldehyde condensate are mixed in a mixing tank as dry powder, or dissolved together and then spray-dried to obtain black dyed cotton as dark black. It has good dyeing performance and satisfactory color fastness.

technical field

[0001] The invention relates to the technical field of chemical dyes, in particular to a reactive dye in the fine chemical industry. 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, 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] However, the main deficiency of the above-mentioned dyes is that the fixation rate of the dyes is only 60% to 65%, the chroma of the dyeing residue is high, and a large amount of ...

Examples

Embodiment 1

[0051] Mix 0.1mol of para-ester (compound 01) and 0.15mol of hydrochloric acid, add 350g of ice-water mixture, beat for 30min, add 30% NaNO dropwise from the liquid surface at 0~5℃ 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.

[0052] Add 0.1mol-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 0.1 mol of 2.4-bis(β-hydroxyethylsulfonyl sulfate) aniline diazonium salt dropwise to the above-mentioned acidic coupling monoazo dye reaction solution, and maintain 10°C and PH6~6.5 to react to the end . The navy blue component dye 101 was obtained after membrane separation to remove salt and spray drying.

Embodiment 2

[0054] Add 15g of sodium methanesulfonate to 10% J acid solution (0.1mol), and react at below 50°C for 4 hours to obtain 2-sulfomethylamino-5-naphthol-7-sulfonic acid solution. Add 0.1 mol para-ester diazonium hydrochloric acid solution to the above coupling components, control pH ≤ 2, and couple at 0-5°C until the reaction is complete. Add 0.2mol para-ester diazonium salt solution dropwise to the above-mentioned 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 get the yellow component dye 301.

Embodiment 4

[0056] 45 parts of dye (101), 15 parts of dye (202), 12 parts of dye (301) and 10 parts of naphthalenesulfonic acid formaldehyde condensate are mixed in a mixing tank as dry powder, or dissolved together and then spray-dried to obtain black dyed cotton as dark black. It has good dyeing performance and satisfactory color fastness.

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