CH161486A - Process for the production of a new dye. - Google Patents

Description

  

  Additional patent to main patent no. <B> 159668. </B> Process for the production of a new dye. It has been found that a new dye is obtained if <B> 1 </B> mol of the diazotized coupling product from an o-ester of 1-diazo-8-oxynaphthalene-3,6-disulfonic acid with 3 -Amii) o-4-cresol methyl ether, <B> 1 </B> moles of cyanuric chloride, <B> 1 </B> moles of 1-amino-8-oxy- iiaphthaliii-3,

  6-disulfonic acid, <B> 1 </B> mol of 4-amino-4'-oxyazobenzene-3'-carboxylic acid and <B> 1 </B> mol of monomethylaniline can act on one another in such a way that the diazotized coupling product in the 7-position of the 1-amino-8-oxy-napb, thalin-3,

  6-disulfoic acid couples and a halogen of cyanuric chloride with the amino group of 1-amino-8-oxynaphthalenesulfonic acid, a halogen of cyano-chloride with the amino group of 4-amino-4'-oxyazoberizole-3'-carboxylic acid and the last halogen atom of the cyanuric chloride reacts with the imino group of monomethylaniline,

   and that the product obtained in this way is subjected to the action of a saponifying agent in order to split off the ester group. The new dye forms a dark powder that dissolves in water with a blue-green color. On cotton from dye baths that have been made with soft or hard water, it produces green tones that are characterized by their excellent lightfastness.



  <I> Example: </I> <B> 62.1 </B> parts of the 1-aminio-8-oxynaphthalene-4'-toluenesulfuric acid ester-3 diazotized by coupling <B> 1 </B> mol , 6-distilfonic acid and <B> 1 </B> mol of 3-amino-4-cresolmethylether obtained dye are diazotized and poured into a cooled ammoniacal solution of <B> 75.9 </B> parts of the ternary Condensation product from <B> 1 </B> mol of cyanuric chloride,

     <B> 1 </B> mol of 1,8-amino-iiaphthol-3,6-disulforic acid, <B> 1 </B> mol of 4-amino-4'-oxyazobenzene-S'-carboxylic acid and <B> 1 </B> Mol monomethylaniline entered. After coupling has ended, the mixture is heated to 85 ° and the toluenesulfonic acid residue is split off at this temperature by adding sodium hydroxide solution. The dye is made up with sodium chloride and dried.

 

Claims (1)

PATENT CLAIM: Process for the preparation of a new dye, characterized in that <B> 1 </B> mol of the diazotized coupling product from an o-ester of 1-diazo-8-oxynaphthalene-3,6-disulfonic acid with S- Amino-4-L-resolmethyl ether, <B> 1 </B> mol of cyanuric chloride, <B> 1 </B> mol of 1- amino-8-oxynaphthalene-3,6-disulphonic acid, <B> 1 </B> mol of 4-amino-4'-oxyazobenzene-S'-carboxylic acid and <B> 1 </B> mol of monomethylaniline can act on one another in such a way that the diazotized coupling product is in the 7-position of the 1 - Amino-8-oxynaphthalene-3,6-disulfonic acid kup pelt and a halogen of the cyanuric chloride with the amino group of 1-amino-S-oxynaphthalene sulfonic acid, a halogen of cyanuric chloride with the amino group of 4-amitio-4'-oxyazobenzene-3'-carboxylic acid and the last halogen atom of cyanuric chloride with the imino group of monomethylaniline and that the product obtained in this way for the purpose of splitting off the ester group of the one subject to the action of a saponifying agent. The new dye forms a dark powder that dissolves in water with a blue-green color. On cotton from dye baths that have been made with soft or hard water, it produces green tones that are characterized by their excellent lightfastness.