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Disperse red dye

A disperse dye and monoazo technology, applied in the field of red disperse dyes, can solve the problems of small pH adaptability range, low product strength, easy fading, etc., and achieve strong washing fastness, strong light fastness, and wide pH adaptability range Effect

Active Publication Date: 2013-11-06
LEPING SAFELY PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The disperse dyes required for polyester dyeing should have the following characteristics: high strength, high color fastness, better leveling and lifting rate; currently the red disperse dyes recommended by foreign dye suppliers are C.I.167 and disperse red C.I.R167 , the product strength is low, when dyeing polyester fibers, the amount of dye is large, the fastness is poor, it is easy to fade, and the PH adaptability range is small, so it is urgent to improve

Method used

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  • Disperse red dye
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put 10ml of 30% hydrochloric acid into the flask, add 20ml and 4g of p-nitroaniline, heat up to 95°C, keep warm for 1 hour, then cool down to 30°C, add 40ml of water, then add 30g of ice, keep the bottle in an ice bath The internal temperature is 0-5 degrees, add 2.5g sodium nitrite 10% solution, keep the reaction for 2 hours, after the reaction is completed, after 2 hours at 0-5 degrees, add the above mixture by 20ml ice water, 4gNaOH and 4-Hydroxy-N-methyl-1,8-naphthoimide (abbreviated as red intermediate, see the following formula for structure).

[0020] R=CH3, CH2CH3 or CH2CH2CH2OCH3.

[0021] After continuing to stir for 2 hours, add 5ml of hydrochloric acid dropwise, continue to stir for 1 hour, heat up to 80 degrees, and keep it warm for 2 hours. The obtained dye is suction filtered, washed with clear water and dried. The reaction product is:

[0022] R=CH3, CH2CH3 or CH2CH2CH2OCH3, max=520nm. After the dyestuff is processed, it becomes bright yellow and l...

Embodiment 2～10

[0024] Replace the p-nitroaniline in Example 1 with o-chloro-p-nitroaniline, red base 3GL, o-methoxy p-nitroaniline, phenyl m-aminobenzenesulfonate, aniline, 2,5-dichloroaniline , 3,4-dichloroaniline, o-nitroaniline, m-nitroaniline, keeping other conditions constant, the reaction products are respectively:

[0025] Coupling of o-chloro-p-nitroaniline and red intermediate

[0026] R=CH3, CH2CH3 or CH2CH2CH2OCH3, into max=520nm

[0027] Coupling of red-based 3GL and red intermediates

[0028] R=CH3, CH2CH3 or CH2CH2CH2OCH3, into max=520nm

[0029] Coupling of o-methoxy-p-nitroaniline and red intermediate

[0030] R=CH3, CH2CH3 or CH2CH2CH2OCH3, into max=550nm

[0031] Coupling of phenyl m-aminobenzenesulfonate and red intermediate

[0032] R=CH3, CH2CH3 or CH2CH2CH2OCH3, into max=510nm

[0033] Coupling of aniline and red intermediates

[0034] R=CH3, CH2CH3 or CH2CH2CH2OCH3, into max=510nm

[0035] Coupling of 2,5-dichloroaniline and red intermediate

[0036]...

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PUM

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Abstract

The invention relates to a disperse red dye, mainly containing a monoazo compound according to the right formula: wherein, R is methyl, ethyl and methoxypropyl; X is hydrogen, chlorine, nitro and methoxyl; Y is hydrogen, chloride, nitro and benzensulfonate; Z is hydrogen, chlorine, methyl, methoxyl and nitro. The monoazo compound is prepared by the following steps: adding amino compounds in hydrochloric acid medium, processing diazotation with sodium nitrite and coupling the product of diazotation and pigment red intermediate in alkali liquor. The invention has the advantages that the dye has very strong light fastness, strong washing fastness and sublimation fastness, is insusceptible to sweat stains and friction and can be apllicable to a wide PH value range.

Description

technical field [0001] The invention relates to a disperse dye, in particular to a red disperse dye. Background technique [0002] The disperse dyes required for polyester dyeing should have the following characteristics: high strength, high color fastness, better leveling and lifting rate; currently the red disperse dyes recommended by foreign dye suppliers are C.I.167 and disperse red C.I.R167 , The product strength is low, when dyeing polyester fibers, the amount of dyestuff is large, the fastness is poor, it is easy to fade, and the PH adaptability range is small, so it is urgent to improve. Contents of the invention [0003] The invention provides a red disperse dye, which overcomes the above-mentioned defects in the prior art. [0004] In order to achieve the above-mentioned purpose of the invention, the technical scheme adopted in the present invention is: a kind of red disperse dye mainly comprises the monoazo compound of following formula, [0005] [0006] I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/38C09B67/36D06P1/18D06P3/54
Inventor 陶国来
Owner LEPING SAFELY PHARMA
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