CH298750A - Process for the production of an acidic wool dye. - Google Patents

Description

  

  Process for the production of an acidic wool dye. (The status of this patent is a process for the production of an acidic wool dye, which consists of adding 1 mol of the compound obtainable by condensation of 1 mol of 4,4'-dichlorobenzophenone with 1 mol of N-methyl-2-phenylindole with 2 moles of 1-amino-4-methoxybenzene-3-sulfonic acid sets.



  The reaction takes place by heating the starting materials with or without the addition of solvents or fluxes, eg. B. with addition of glycol or similar compounds .. You can use temperatures of 110 to 160 C, for example. The 1-amino-4-methoxybenzene-3-sulfonic acid is used as the free acid or in the form of its alkali or ammonium salts.



  The new dye dyes wool in very clear blue shades of good lightfastness and a beautiful evening color. It has good leveling properties, good drawability from acidic and neutral baths, and good fastness to sea water and perspiration. Example: 251 g of 4,4'-dichlorobenzophenone and 207 g of N-methyl-2-phenylindole are dissolved in 1800 cm3 of chlorobenzene at 70 <B> 0 </B> and with the addition of <B> 160 </B> g of anhydrous zinc chloride and 306 g of phosphorus oxychloride were stirred at 120 to 125 ° C. for 18 hours.

   After cooling, the resulting red-brown crystals are filtered off with suction, washed with cold chlorobenzene and dried. The red condensation compound obtained in this way is strongly colored per se, but does not yet have any paraffin character; it is soluble in concentrated sulfuric acid, with a deep red-brown color and in glacial acetic acid with a yellow-brown color.



  45 g of this compound are stirred with 270 g of glycol and 104 g of the sodium, potassium or ammonium salt of 1-amino-4-methoxybenzene-3-sulfonic acid for 3 to 6 hours at 120 to 130 ° C. until the dye no longer forms @ztmimmen. When pouring into water, a blue dye is deposited, which is sucked off and cleaned by washing out with a little cold water.

   It is dissolved in warm water with the addition of a sufficient amount of sodium carbonate, the solution is filtered, mixed with 20 to 25 g of a dispersing agent, and the dye is then deposited from the solution by salting out with sodium chloride The sodium salt of a uniform disulfonic acid with the following composition
EMI0002.0001
    The new dye dyes wool in very clear blue shades of good lightfastness and a beautiful evening color.

   It possesses good leveling properties, good drawability from acidic and neutral baths and good fastness to sea water and vision; Furthermore, it has practically no affinity for cotton fibers and therefore provides dyeings with pure cotton effects on blended fabrics made of wool and cotton.

 

Claims (1)

PATENT CLAIM Process for the production of an acidic wool dye, characterized in that 1 llol of the compound obtainable by condensation of 1 lol -1.-1'-dielilobenzophenone with 1 llol N-methyl-2-plieiijinclol is mixed with 2 lol 1- @ lmino-4 -metliolvbenzene-3-sulfonic acid: The new dye dyes wool in very clear blue shades of good lightfastness and a beautiful evening color. It has a good leveling @ # ei @ inö-en, good drawability from acidic and neutral baths as well as good sea water and sweat proofness. SUBClaims 1. A method according to patent claim, characterized in that the alkali metal or ammonium salt of 1-amino-4-methox5-benzene-3-sulfonic acid is used for the implementation. Process according to patent claim, characterized in that the reaction is carried out by heating at 120 to 130 C. 3. The method according to patent claims, characterized in that one carries out the implementation in laying war of glycol as a diluent.