DE2712088C2 - Process for dyeing or printing fiber materials with reactive hydrogen atoms with azo dyes produced on the fiber - Google Patents

Description

The main patent 26 03 44b relates to a process for dyeing or printing fibers, which have reactive hydrogen atoms with azo dyes that can be generated on the fiber. through this characterized in that the fiber materials

1) treated with an aqueous liquor or printing paste containing a coupling component that Solution of a diazotizable primary aromatic or heterocyclic water-soluble fiber-reactive Amine, alkali and sodium nitrite and then acidified or that one

2) first primed with a coupling component, optionally rinsing, then a diazotizable one primary aromatic or heterocyclic water-soluble fiber-reactive amine in the presence applies alkali, electrolyte and sodium nitrite from an aqueous solution and then acidifies or, that he

3) first primed with a coupling component, then rinsed in an alkaline intermediate rinsing bath, wherein the intermediate rinsing bath is a dissolved diazotizable primary aromatic or heterocyclic water-soluble fiber-reactive amine, sodium nitrite and optionally electrolyte added and then acidified.

In a further development of this process it has now been found that it is advantageous, especially in the With regard to the solvent fastness of the dyeings obtained, if one is used as coupling components uses those which also have at least one fiber-reactive group.

The subject of the invention is therefore a method for dyeing or printing fiber materials that Have reactive hydrogen atoms with azo dyes that can be generated on the fiber, whereby the Fiber materials

· -, 1) treated with an aqueous liquor or printing paste containing a coupling component that Solution of a diazotizable primary aromatic or heterocyclic water-soluble fiber-reactive Amine, alkali and sodium nitrite contains ι ο and then acidified or that one

2) first primed with a coupling component, optionally rinsing, then a diazotizable one primary aromatic or heterocyclic water-soluble fiber-reactive amine in the presence

ι--, from alkali, electrolyte and sodium nitrite aqueous solution and then acidified or that one

3) first primed with a coupling component, then rinsed in an alkaline intermediate rinsing bath,

jo being the intermediate rinse a dissolved diazotizable primary aromatic or heterocyclic water-soluble fiber-reactive amine, Sodium nitrite and optionally electrolyte added and then acidified according to patent 26 03 446,

> -, characterized in that the coupling component used is one which has at least one fiber-reactive group.
Suitable amines for the process are all aromatic or heterocyclic primary amines,

jo which by a fiber-reactive group in the molecule labeled and soluble in water. The water solubility can be influenced by the fiber-reactive group on the other hand, they can have other water-solubilizing groups in the molecule,

r, in particular cause sulfonic acid groups.

Rs are therefore primary aromatic carbocyclic or heterocyclic amines, the at least one with the reactive hydrogen atoms possessing fibers, such as. B. with the cellulose fiber

ίο reactive group or a precursor therefor or have a substituent reactive with such fibers. As reactive groups are, for. B. Epoxy groups, the ethylene imide group, the vinyl group within the vinyl sulfone or acrylic acid residue,

4 ^r , also as precursors that form reactive groups in an alkaline medium, the /? - sulfato-ethylsulfonyl group, the J3-chloroethylsulfonyl group, the j9-thiosulfatoethylsulfonyl group and the /? - phosphatoethylsulfonyl group. It doesn't matter

■ -, o matter whether these remnants are immediate or via a Intermediate link, especially -NH-, -NR- (R = lower Alkyl), lower alkylene groups or a combination of such intermediate members on the amine are bound, such as B. the Äthionylaminorest. as

<-, <; reactive substituents in fiber-reactive amines those that can be easily split off and leave an electrophilic residue, such as halogen atoms, come into consideration on the following ring systems: quinoxaline, triazine, pyrimidine, phthalazine and pyridazone. Furthermore

ho can also be used amines, their more reactive The remainder is a ^ - (2,2,3,3-tetrafluoro-cyclobutyl) -acryloylamino group or a j3- (2,2,3,3-tetrafluoro-4-alkylcyclobutyO-acryloylamino group represents, in the latter case the alkyl group in the 4-position 1 to 4

b ·, has carbon atoms.

The fiber reactive group can be blocked, e.g. B. by reaction with methyl taurine. The blocking can be overridden by customary measures.

All coupling components which are fiber-reactive are suitable for carrying out the claimed process Contain groups such as B .:

Halotriazine, halogenpyrimidine,

Haloquinoxaline carbonyl,

Halogenphthalazincarbonyl-, Vinylsulfon-, / f-Hydroxyäthylsulfonester-, Methylsulfonyl-benzothiazole-, fluorobenzothiazole-, ß-hydroxyethyl-sulfonamine-ester-, jJ-Hydroxyäthylsulfonalkylaminoester, ß-bromoacryloyl-.ß-chloropropionyl-, JJ-Chloracetyl-./J-Phenylsulfonylpropionyl-, Halopyridazonalkyl-, 2-chlorobenzothiazolesulfonyl-,

Alkylsulfonyl-pyrimidine-, ammoniumtriazine- and

Acryloyl groups

or residues that can be converted into these groups.

Such reactive coupling components can also be used with advantage for the new process whose water solubility is not only due to the solubilizing effect of the reactive group based, but those that have other water solubility-causing groups in the molecule, such as. B. sulfo- or contain carboxy groups. The increased water solubility has a beneficial effect in that significantly higher concentrations are required for padding liquors are than for pull-out fleets.

For example per liter of padding liquor is dissolved in hot water (80 ⁰ C) 20 g of the compound of formula

HO

SO ₂ CH ₂ CH ₂ - O - SO ₁ H

to the solution (1) and prepares per liter of padding liquor with hot water (80 ⁰ C) a solution (2) from G of the compound of formula

O SO, CH ₂ CII ₂ O SO, H

Both solutions are stirred in cold water, which 20 ml / 1 sodium hydroxide solution 32.5% and

20 g / l sodium nitrite
contains.

The padding liquor thus obtained is used to pad a bleached, mercerized cotton fabric with 60% Take up the liquor, roll up the fabric, wrap it in plastic wrap and leave overnight at room temperature linger.

For development, the tissue is used on the other day with a liquor pick-up of

100% with a

33 ml / 1 hydrochloric acid 32.1%,

50 ml / 1 acetic acid 60% and

20 g / l sodium acetate
containing the fleet.

This is followed by an air passage of 60 seconds and a passage through hot water (70 ° C). After that, will rinsed, soaped and rinsed again. A clear, true yellow coloration is obtained.

Claims (3)

Claim: A process for dyeing or printing fiber materials which have reactive hydrogen atoms with azo dyes that can be generated on the fiber, whereby the fiber materials are used 1) treated with an aqueous liquor or printing paste containing a coupling component that Solution of a diazotizable primary aromatic or heterocyclic water-soluble contains fiber-reactive amine, alkali and sodium nitrite and then acidifies or that man 2) first primed with a coupling component, if necessary rinsed in between, then a diazotizable primary aromatic or heterocyclic water soluble fiber reactive Applying amine in the presence of alkali, electrolyte and sodium nitrite from aqueous solution and then acidify, or that one 3) first primed with a coupling component, then in an alkaline intermediate rinse bath rinsing, whereby a dissolved diazotizable primary aromatic is added to the intermediate rinsing bath or heterocyclic water-soluble fiber-reactive amine, sodium nitrite and optionally Electrolyte is added and then acidified according to Patent 2b 03 446, characterized in that that one used as a coupling component such that at least has a fiber-reactive group.