DE921021C - Process for the production of black dyeing on polyamide fibers - Google Patents

Description

Process for the production of steam-resistant black dyeing on polyamide fibers The production of black dyeings on polyamide fibers, which a later Resist heat setting, even with the use of steam, without bleeding on white or to be destroyed is not yet possible in a satisfactory manner.

It has now been found that black colorations of high steam resistance can be obtained can be achieved if arylamides are applied to the polyamide fiber in a manner known per se of 5'-oxy-benzocarbazole- (i, 2; i ', 2') -4 .'-carboxylic acid with the tetrazonium compounds of optionally substituted q., 4 .'-Diaminodiphenylen brings to the coupling.

This can be done in such a way that, for example, 5'-oxy-benzocarbazole- (i, 2; i ', 2') - q .'- carboxylic acid arylamides as alkali metal salts together with the optionally substituted q., q .'-Diaminophenylen can be drawn onto the fiber or imprinted and then diazotized on the fiber and brings about the coupling. It can but also done in such a way that the alkali salt of 5'-oxy-benzocarbazole (i, 2; i ', 2') - q .'-carboxylic acid arylamides together with a suitable tetrazoamino compound an optionally substituted q., q .'-Diaminodiphenyls applied to the fiber and by heat treatment of acid, cleavage of the tetrazoamino compound and coupling is brought about to the azo dye.

In printing you can also work in such a way that you use a printing paste, which an alkali salt of 5'-oxy-benzocarbazole- (i, 2; i ', 2') -4'-carboxylic acid arylamide and an antidiazotate from a tetrazotized q., 4 .'-Diaminodiphenyl contains, imprints, dries, if necessary steams and acidifies or in acidic steam treated.

The mixtures of the dye components can be applied to the fiber of caustic alkaline, Söda-alkalischen or ammoniacal solutions are applied, if necessary in the presence of compounds which can serve as dissolving agents. As such are ethyl alcohol, methyl alcohol, glycols, ethanolamine, diethanolamine, Triethanolamine, pyridine, pyrroline, guanidine salts and other salt-forming organic Nitrogen compounds applicable. The stability of the baths depends on this on the type and amount of alkali and solvent used.

After the coupling is expediently using in the tub Various types of soap or detergents are rewashed, causing decomposition products, By-products, inter alia m. be removed from the fiber.

Example i Polyamide fiber is treated in a liquor ratio of I: 3o at 85 ° in a bath containing 0.75 g of I- (5 "-Oxy-I ', 2';1", 2 "-benzocarbazole-4" -carboylamino ) -4-methoxybenzene and 0.759 of 4,4'-diaminodiphenyl, dissolved in the heat in 5 cc of diethanolamine, 1 cc of water and 0.083 g of caustic soda, as well as 3 g of a condensation product of higher molecular weight fatty acids and protein degradation products and 2.2 g of caustic soda .

The treatment is carried out for about an hour, 10 g of table salt are added per liter and the treatment is continued for 1/2 hour. It is then rinsed briefly, dianotized with 3 g of sodium nitrite and 7.5 g of concentrated sulfuric acid per liter for 30 minutes in the cold and the coupling is completed by subsequent treatment with 4 g of sodium acetate per liter of liquor at 60 °.

After coupling has taken place, it is washed at 80 ° with a nonionic Detergent with the addition of ammonia or soda at 80 °, rinses and receives a deep Black.

If one uses in the above example instead of 1- (5 "-OXy-1 ', 2'; i", 2 "-benzocarbazole-4" -carboylamino) - 4 - methoxybenzene the I - (5 "- oxy - I ', 2'; i ", 2" -benzocarbazole-4 "-carboylamino) -2-methyl-4-methoxybenzene, one obtains a bluish black; when using 4, 4'-diamino-3, 3'-dimethoxydiphenyl or 4,4'-diamino-3, 3'-dimethyldiphenyl is obtained in place of 4,4'-diaminodiphenyl one blue-black tones. Similar shades are obtained when using 4,4'-diamino-3, 3'-dichlorodiphenyl or 4, 4'-diamino-2, 2 '; 5,5'-tetramethyl- 'diphenyl.

Example 2 Polyamide fiber is treated in a liquor ratio of I: 3o at 85 ° in a bath containing 0.75 g of I- (5 "-Oxy-I ', 2';I", 2 "-benzocarbazole-.a." -carboylamino) -4-methoxybenzene, dissolved in 2 cc of denatured alcohol, 0.083 g of caustic soda and 0.75 cc of water, and 2 g of the tetrazoamino compound from 1 mole of tetrazotized 4,4'-diaminodiphenyl and 2 moles of diethanolamine, dissolved in 5 ccm of denatured alcohol, 3 g of a condensation product of higher molecular weight fatty acids and protein degradation products and 2.2 g of caustic soda.

After 1 hour, 10 g of common salt are added and the treatment is continued at 85 ° for about 1/2 hour. This is followed by a brief cold rinse and treatment for about 1/ "hour at 80 ° in a bath containing 5 g of sulfuric acid, 96%, per liter. Then rinsed and soaped at 80 ° with a non-ionic detergent and a little ammonia and dries. A deep black is obtained. EXAMPLE 3 120 g of I- (5 "-OXy-I ', 2';I", 2 "-benzocarbazole-4" -carboylamino) -4-methoxybenzene and 80 g of the antidiazotate from 4 , 4'-Diamino-3, 3'-dimethoxydiphenyl are made into a paste with 20 cc of a sulfonated castor oil, e.g. monopoly brilliant oil, 30 cc of sodium hydroxide solution, 32 ° / aig, and 50 cc of denatured alcohol and poured zoo cc of water over 50 The solution is stirred into 500 g of starch-tragacanth thickener and gives 1 kg of printing paste.

Washed and dried polyamide piece goods are given with the specified Paste printed, dried and steamed neutrally for 5 minutes, acidic and neutrally rinsed, soaped and dried. Development can also be achieved by or through acidic steaming an acid passage takes place. Depending on the engraving, it will be dark gray to black Good fastness printing obtained.

Claims (1)

PATENT CLAIM: Process for the production of steam-fast black dyeing on polyamide fibers, characterized in that arylamides of 5'-oxy-benzocarbazole (i, 2; 1 ', 2') -4'-carboxylic acid with the tetrazonium compounds of optionally substituted 4 Brings, 4'-diaminodiphenylene for coupling.