DE1519501A1 - Process for dyeing or printing polyester fiber material - Google Patents

Description

Patent attorneys

Dr. W. Schalk, DipUng. P. We *

Di-l.-lng. G. Dannenberg

D. V. Schmied-Kowarzik

Dr. ?. Weinhold, Dr. D. Güdel Frankfurt / M ,, Gr. E * ch «nh * im» r Str. 39

P 15 19 501.4 Oase 1187 / A

SANDOZ AG Basel, Switzerland

Process for dyeing or printing polyester fiber material It has been found that very "valuable dyeings or prints are obtained on fibers and textile materials made from polyesters, preferably linear, aromatic polyesters, if

these with dyes of the formula

Z

(I)

Vi or in X hydrogen or cyano, Y 'low molecular weight acylamino, Z low molecular weight alkoxy, R-. low molecular weight acyloxyalkyl

and R ₂ - mean low molecular weight acyloxyalkyl.

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BATH

The dyeing is carried out according to known methods, for example in the presence of carriers at 80 to 100 ⁰ C or in the absence of Car.riern, under pressure at 100 to IO I ^{2 0} C, in both cases, the addition of dispersing agents of Can be an advantage; Printing is preferably carried out in the presence of suitable thickeners, e.g. Alginates, British gum, gum arabic, hydroxyethyl cellulose, carboxymethyl cellulose, polyacrylamides or polyvinyl alcohol j the prints are usually fixed by dry heat or steam treatment.

The main linear, aromatic polyesters are the polycondensation products of terephthalic acid and ethylene glycol to understand.

The dyes are mostly turned into coloring preparations before they are used processed, for example, the dried dye with a dispersant, optionally in the presence of fillers, ground or in paste form with a The dispersant is kneaded and then dried in vacuo or by atomization. ·

The dyeings obtained are characterized by very good fastness properties', In particular, good light, washing, perspiration, sea water, smoke gas, sublimation, pleating, steaming and ironing fastness. At the 'Wool, cotton, and viscose are good at dyeing blended fabrics reserved.

0 0 9 8 4 1/17 2 6 - BAD ORIGINAL

In the following example, parts are parts by weight and below. Percentages to understand percentages by weight. The temperatures are given in degrees Celsius.

Example ··

7 parts of the dye of the formula ^, ^ - Dinitro-S'-acetylamino- '■.

V-diaoetoxyäthyl-S'-ethoxy-l ^ l'-azobenzene are with 4 parts D inaphthylmethanedisulphonic acids! Sodium, 4 parts sodium cetyl

sulfate and 5 parts of sodium sulfate in a ball mill for 48 hours " ground to a fine powder.

2 parts of the dye preparation thus obtained are in 3000 parts

Water, which contains 3 parts of a BO ^ solution of a highly sulfonated castor oil and 20 parts of an emulsion of a chlorinated benzene, dispersed. 100 parts of polyester fiber fabric "Dacron" (registered * trademark) are put in at 20-25 ^Q , the bath is heated to 95-100 ° in about 30 minutes and dyed at 95-100 ° for 1 hour. The material to be dyed is removed from the 3ad, rinsed, soaped for 15 minutes at 70 ° with a 0.1 solution of an alkylphenyl polyglycol ether, rinsed again and dried. A blue dyeing with excellent fastness properties is obtained.

The dye used is prepared as follows: 6.9 parts of finely powdered, anhydrous xa ^ rium nitrite are slowly added to 105 parts of sulfuric acid (90 °) at 60 ° -70 ° with stirring. The clear solution is cooled to 10-15 ° and 100 parts of glacial acetic acid are added at a maximum of 20 °. Subsequently 1.3,5 parts of 2,4-dinitroaniline _n U ^ 4_d £ ^ saca LDO, parts are e'ben zu'ge glacial acetic acid ~.

BATH ORIGINAL

The mixture is stirred for 2 hours at 15-20 ° and then the excess nitrite destroyed by addition of 5 parts of urea. The diazonium salt solution prepared in this way is added to a mixture of 37 parts of 3-di-. Acetoxyethylamino- ^ - ethoxyacetanilide, which are dissolved in 200 parts of glacial acetic acid, and 100 parts of ice. The temperature is maintained by adding ice After a short time it is filtered, washed acid-free with water and dried. The dark blue powder melts at 158-101 ° and after recrystallizing once from a mixture of alcohol and acetone

Ιββ-1βδ °.

With the dye of the formula 2, ⁱ t - dinitro-2'-acetylamino- ' ⁱ i ^f -diacetoxyethyl-5'-methoxy-l, l'-azobenzene is obtained - if this according to. the above example is dyed on polyester material, greenish blue dyeings with excellent fastness properties. . .

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Claims (2)

Claims 1. Process for dyeing or printing fibers or from them. made of polyester, preferably made of linear, aromatic polyesters, characterized in that there are dyes of the formula NO ₂ (I) used, where X is hydrogen or cyano, Y low molecular weight acylamino / Z low molecular weight alkoxy, and Rt low molecular weight acyloxyalkyl and R is low molecular weight acyloxyalkyl. 2. The material dyed or printed according to claim 1. New underground ^ u ^ a * i * ³ ' BATH 009841/172 6