CH310828A - Process for the production of a metallizable polyazo dye. - Google Patents

Description

  

      Process for the production of a metallizable polyazo dye. It has been found that valuable, metallizable tris and polyazo dyes of the general formula
EMI0001.0008
    where acyl means a carbacyl radical, it holds when one n molecules of a diazonium compound of the benzene series- (A), which in o-,

  Position to the diazo group contains a metallizable substituent, with a mono primary amino compound of the formula (Acy @ l-CH2-CO-NH), i B-NH2 which compound is derived from a polynuclear, substantive polyamine compound (B) of the benzene series, and in which all amino groups except for one are acyloaeetylated, combined,

   the aminoazo dye obtained is diazotized and the diazo compound is diazotized in an acidic agent with a 1-amino-2-alkoxynaphthalene compound (D) which couples in the p-position to the amino group and which may contain substituted alkyl radicals in the alkoxy groups and sulfonic acid groups,

   combined and the resulting Aminopolyazofarbst.off diazotized and coupled in an alkaline medium with a 2-acylamino-6-oxy-naphthalene-8-sulfonic acid.



  The new polyazo dyes, in the form of their alkali salts, are soluble in hot water with a green color and dye cellulose fibers from the dyebath containing Glauber's salt directly in olive, yellow-green to green shades. In the aftertreatment of the cehulose dyeings with copper-releasing agents, the color tone is only slightly changed, but the NTassfastness and lightfastness are significantly improved.

   The copper plating can be done in the dye bath or on a fresh bath with common copper salts, such as copper acetate or copper sulfate, in a neutral to slightly acidic agent. If necessary, you can also use copper compounds resistant to alkalis, such as those obtained when converting copper sulfate with sodium tartrate in a solo alkaline bath.



       The present patent now relates to a process for the production of a metallizable trisazo dye. The process is characterized in that diazotized 2-amino-1-oxy-benzene-4-methylsulfone is coupled with 5- (3'-acetoa.cetylamino-benzoylamino) -2-aminobenzene-1-sulfonic acid , further diazotizes the monoazo dye obtained,

      combined with 1-amino-naphthalene-2-glycolic acid, the resulting compound is diazotized and. with 2-Benzoy'lamino-6-oxy-naphthalene-8-sulfonic acid.



  The new trisazo dye obtained is a dark powder that dyes cellulose fibers in lively, yellowish green tones, which are light, washable and acidic after treatment with copper salts.



  <I> Example: </I> 18.7 parts of 2-amino-1-oxy-benzene-4-methylsulfone are concentrated in 200 parts of water with 15 parts. Dissolved hydrochloric acid and diazotized at 10 with 6.9 parts of sodium nitrite. The resulting suspension flows into a solution of 41 parts of 5- (3'-acetoacetylamino-benzoyl-amino)

  -2-amino-ben7ol-1-sulfonic acid in 400 parts of water and 24 parts of sodium bicarbonate. When the coupling is complete, the yellow 1V zonoazo dye is salted out and filtered off.

   The press cake is dissolved in 1000 parts of water and 6.9 parts of sodium nitrite are added. By dripping onto 40 parts of conc. Hydrochloric acid at 10-15 gives a yellow diazo suspension which, after stirring for four hours with 5 parts of sodium carbonate. Made weakly Congo acid and with a solution of 21.7 parts of 1-amino-naphthalene-2-glycolic acid and 20 parts of sodium acetate. is united. To accelerate the coupling, 4 parts of sodium carbonate are used to truncate until the reaction is weakly acidic.

   The disazo dye formed is also dissolved. 5 parts of caustic soda, mixed with 400 parts of table salt, 60 parts of conc. Hydrochloric acid and diazotized with 8.2 parts of sodium nitrite at 20. When the diazotization has ended, it is filtered and washed. The diazo compound is combined in the presence of 150 parts of pyridine and 20 parts of sodium carbonate with 34.3 parts of 2-benzoylamino-6-oxynaphthalene-8-sulfonic acid in 200 parts of water.

      The green trisazo dye of the formula
EMI0002.0041
    is excreted with a little salt, filtered off. and washed free of adhering impurities. It represents a dark powder, which is green in water and in conc. Dissolves sulfuric acid with an olive green color. It stains fibers made from natural or regenerated cellulose in lively, yellow, green tones. Post-treatment with copper salts makes the colorations light, washable and acid-fast.

 

Claims (1)

PATENT CLAIM: Process for the production of a metallizable polyazo dye, characterized in that diazotized 2-amino-1-oxybenzene-4-methylsilphon with 5- (3'-acetoacetylamino-benzojamino) - 2 - Amino-benzene-l-silfonic acid couples, the resulting monoazo dye is further diazotized, combined with 1-amino-naphtahlin- 2-glycolic acid, the resulting compound is diazotized and coupled with 2-benzoylamino-6-oxy-naphtha, Iin-8-sulfonic acid .. The new trisazo dye obtained is a dark powder that contains cellulose fibers lively, yellow-tinged green tones, which after treatment with copper salts become light, washable and acid-fast.