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Reactive dye compounds

A technology of reactive dyes and dye compositions, applied in the field of reactive dye compounds, to achieve the effects of increased affinity, greater coloring strength, and increased efficacy

Inactive Publication Date: 2005-04-06
THE UNIV OF NORTH CAROLINA AT CHAPEL HILL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a serious problem still faced by today's textile dyeing industry is that large amounts of dyestuff substances are left in the discharged wastewater after the dyeing process is completed

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0061] The invention also relates to a process for the preparation of the dyes of the invention. In general, the dyes of the present invention are prepared by a process comprising the steps of reacting a first material (preferably 1 mole) with a second material (preferably 1 mole), the first material containing at least one chromophore , at least one through SO 2 C 2 h 4 The sulfur atom of the group is directly connected to the chromophore group or is connected to the chromophore group through a linking group (such as Remazol dye). 2 C 2 h 4 group, the second starting material is a compound containing a suitable Y group, for example a hydrated form of a carbohydrate such as sucrose or glucose, or a hydrated form of formic acid. As mentioned above, the carbohydrate substance in hydrated form is preferably obtained by acid hydrolysis. Of course, there are other methods of obtaining hydrated forms, such as those of naturally occurring aldehydes or ketones such as 4-piperido...

Embodiment 17

[0115] All of the dye compounds prepared according to Examples 1-16 were used to dye cotton using the dyeing procedure detailed below. After performing the cotton dyeing step, it is also possible to perform a soaping process of the cotton fibers.

[0116] cotton dyeing steps

[0117] An aqueous dye solution containing the dye compound of any one of Examples 1-16 was prepared. The dye solution contains 1% dye based on fiber mass, 80g / L Na 2 SO 4 and 5% sodium acetate based on fiber mass. The cotton fabric was soaked in water, and then dyed for 15 minutes at 25° C. in the above-mentioned dyeing bath with a pH value of 7. Then, in a dyeing bath with a pH value of 11.5, 30 g / L trisodium phosphate was added to fix the dyed cotton fabric, and the dyeing was continued at 25° C. for 45 minutes. Rinse the stained fabric with water.

[0118] In the above dyeing process, the dye bath of each dye compound was almost completely evacuated (i.e. there was only slight color in the dye...

Embodiment 20

[0129] All of the dye compounds prepared in Examples 1-16 can be used to dye nylon or wool using the dyeing methods detailed below. After the nylon / wool dyeing step is complete, a wash test procedure can be performed on the dyed fabric to test the wash fastness of the dye compound.

[0130] Wool / Nylon Dyeing Steps

[0131] The wool / nylon fabric was soaked in a solution of 2% w / w Alcopol-O (40% w / w sodium d-isooctylthio-succinate from Allied Colloids). Then, under the conditions of 100 DEG C and pH value of 3.5, the fabric was dyed for 1 hour in a dyebath containing the following composition: 1.2% of the dyes prepared in Examples 1-7 based on fiber mass, 5% based on fiber mass based sodium acetate, 1% Albegal B (available from Ciba). The dyed wool / nylon fabric is then rinsed with water.

[0132] In the above procedure, each of the compounds prepared in Examples 1-16 provided strong staining.

[0133] Test procedure for Co2 (ISO) wash fastness of wool / nylon fabrics

[0...

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Abstract

A reactive dye compound comprising (a) at least one chromophore moiety; (b) at least one SO2C2H4 group which is attached to the chromophore moiety either directly via the sulphur atom of the SO2C2H4 group or via a linking group L; characterised in that at least one SO2C2H4 group is substituted on its terminal carbon atom with at least one Y group wherein Y is derived from a hydrated aldehyde, a hydrated ketone, a hydrated alpha-hydroxy ketone or the hydrated form of formic acid, and linked via one of its oxygen atoms to the terminal carbon of the SO2C2H4 group thereby forming a hemiacetal. The compounds herein have high Exhaustion Values (E), high Fixation Values (F) and high Efficiency Values (T) and show significant improvements in terms of reducing spent dyestuff in effluent, increasing dye affinity to the substrate, increasing the dye-substrate covalent bonding, increasing the ability to dye substrates at room temperature, decreasing the amount of dye that is removed during the post dyeing 'soaping off process' and therefore simplifying the post dyeing 'soaping off process' traditionally associated with dyeing cotton with fibre reactive dyes and reduction of staining of adjacent white fabrics. In addition, the compounds prepared above provide more intense dyeings and require less levels of salt for dyeing cotton substrates.

Description

technical field [0001] This invention relates to reactive dye compounds. In particular, the present invention relates to reactive dye compounds having improved dyebath uptake (E) and improved dye-fiber covalent fixation values ​​(F). Background of the invention [0002] Reactive dye compounds are known in the art of dyeing various substrates. Such substrates include, for example, proteinaceous substances such as keratin, such as found in hair, skin and nails and various parts of animal bodies such as horns, hooves and feathers, and other naturally occurring proteinaceous substances such as silk and sugar-derived Substances such as cellulose-derived substances or cellulose derivatives, such as natural products such as cotton and synthetic fibers such as polyamide. [0003] Examples of classes of reactive dyes known in the art include dyes containing vinylsulfone groups or vinylsulfone precursor groups, such as those available from Dystar under the trade name Remazol. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D251/50A61K8/00A61K8/41A61K8/46A61K8/49A61Q5/10C09B62/44C09B62/503C09B62/505C09B62/51C09B62/517C09B62/78C09B62/80C09B62/825C09B62/84D06P1/384D06P3/14D06P3/24D06P3/32D06P3/66
CPCA61K2800/438C09B62/4401A61K8/494A61Q5/10A61K8/4953A61K8/4966C09B62/503A61K8/41A61K8/46A61K8/4906
Inventor 彼得·J·布罗德本特戴维·M·刘易斯吉勒斯·Y·M·F·吉纳因何卫东塔尔·I·尤萨夫
Owner THE UNIV OF NORTH CAROLINA AT CHAPEL HILL
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