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Azo-type disperse dye compound suitable for dyeing in acid-alkaline bath, its preparation method, composition and application

A technology of disperse dyes and compounds, applied in azo dyes, monoazo dyes, dyeing methods, etc., to achieve excellent perspiration fastness, improved dyeing performance, and good reproducibility

Active Publication Date: 2022-05-27
ZHEJIANG RUNTU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally speaking, disperse dyes are mainly used for dyeing polyester fibers, but most disperse dyes can only be dyed in acid dye baths

Method used

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  • Azo-type disperse dye compound suitable for dyeing in acid-alkaline bath, its preparation method, composition and application
  • Azo-type disperse dye compound suitable for dyeing in acid-alkaline bath, its preparation method, composition and application
  • Azo-type disperse dye compound suitable for dyeing in acid-alkaline bath, its preparation method, composition and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 250mL flask add 180g sulfuric acid (98%), 40g phosphate (85%), 96g nitrosyl sulfate (28%), 40g below 5 °C 3-amino-5-nitro-2,1-benzisothiazole (0.205mol), 0 ~ 5 °C insulation reaction for 4 hours, to obtain diazo liquid, to be used;

[0032] Add 250g of ice water, 20g of 98 acid, 2g of TX-10-2, 43g of N-ethyl-N-chloroethyl m-toluidine (0.205mol), 1g of aminosulfonic acid, fully dissolved pulp, add crushed ice to cool below 0 °C, and then slowly add nitrogen to the coupling component at 0 ~5 °C, stir until the coupling reaction is over, continue to stir for 2h, slowly heat up to 60 °C, keep warm for 2 hours, filter, wash to neutral, dry. The dye compound (I-1) was prepared, the filter cake was dried 73.3g, the yield was 88.5%, and the HPLC: 97.34%.

Embodiment 2

[0034] 250mL flask add 30g of sulfuric acid, 39g of nitrosyl sulfate, stir, cool down to 20 °C, start slowly adding 25g2,6-dibromo-4-nitroaniline, cast at 30 ~ 35 °C for 2h, set aside.

[0035] Add 200g of ice water to 1000mL beaker, turn on stirring, slowly add 20g98 acid, 1g of sulfamic acid, 1gTX-10-2, 13.5g of N-ethyl-N-chloroethyl m-toluidine with a content of 99%, beat the pulp to fully dissolve, and then add crushed ice to cool down to below 0 °C, and then slowly add nitrogen to the coupling component at 0 ~5 °C, stir until the coupling reaction is over, continue to stir for 2h, slowly heat up to 90 °C, heat up to crystallization for 2 hours, filter, wash to neutral, and prepare the dye monomer (I-2), filter cake dry 32.35g, yield 94.92%, HPLC: 98.86%.

Embodiment 3

[0037] 250mL flask added 21g of sulfuric acid, 43.8g of nitrite sulfate, stirred, cooled to 20 °C, began to slowly add 2,4-dinitro-6-bromoaniline 25g, cast at 25 ~ 30 °C for 2h, set aside.

[0038]2000mL beaker add 500g of ice water, 20g of 98% acid, 1.5gTX-10-2, 19g of 99% N-ethyl-N-chloroethyl m-toluidine, 1g of sulfamic acid, beat fully dissolved, and then add crushed ice to cool down to below 0 °C, and then slowly drop nitrogen into the coupling component at -5 ~5 °C, stir until the coupling reaction is over, continue to stir for 2h, slowly heat up to 60 °C, keep warm for 2 hours, filter, wash to neutral, to obtain dye monomer (I-3), The filter cake dried 40.85g, yield 90.99%, HPLC: 94.76%.

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Abstract

An azo-type disperse dye compound suitable for dyeing in an acid-alkaline bath is characterized in that it has a structure shown in the following formula (I): in the formula (I), A is selected from 5-nitro-2 ,1-benzisothiazolyl, 2,6-dibromo-4-nitrophenyl, 2,4-dinitro-6-bromophenyl or 2-chloro-4-nitrophenyl; R 1 , R 2 each independently selected from H, C 1 -C 6 straight-chain or branched-chain alkyl. The disperse dye compound provided by the invention has a simple production process, a wide pH range, and is suitable for dyeing in alkaline dye baths. It has high dye uptake, good lifting performance, excellent perspiration fastness, and light fastness and other advantages.

Description

Technical field [0001] The present invention relates to an azo-type disperse dye compound suitable for dyeing in an acid - alkaline bath, preparation method thereof, compositions and uses. Background [0002] In general, disperse dyes are mainly used for the dyeing of polyester fibers, but most disperse dyes can only be dyed in acid dyeing baths. At this stage, the environmental protection situation at home and abroad is very severe, and dyeing under alkaline conditions can greatly reduce the amount of sewage discharge, reduce the printing and dyeing process, and shorten the printing and dyeing time. For example, textile pretreatment requires alkali reduction, if the alkali reduction and dyeing are carried out at the same time, on the one hand, it can save a process and save labor costs, on the other hand, the amount of sewage discharged during washing and neutralization is greatly reduced, so the advantages of alkaline dyeing are very obvious. Contents of the Invention [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B29/08C09B67/36C09B67/38D06P1/16D06P3/36D06P3/85
CPCC09B29/08C09B67/0079C09B67/008D06P1/16D06P3/36D06P3/8204
Inventor 丁兴成何江伟陶彬彬龚斌彬陈伟兴李家琪
Owner ZHEJIANG RUNTU
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