DE673158C - Process for dyeing with Kuepen dyes - Google Patents

Description

Process for dyeing with vat dyes In vat dyeing has up to now, the vats of rizmus oil soaps have been sulfonated to produce uniform colorations oils, monopoly soap and similar agents added. In order to do this afterwards To achieve a stronger absorption of the dye, one had to give the vat even more Add dye, as the known leveling agent, part of the dye held back in the bath and prevented them from being drawn up.

It was found that in vat dyeing cotton, rayon, from reprecipitated cellulose, linen, wool and other fibers by using two different types of dissociable surface-active compounds one after the other Can achieve results which the results obtained according to known Arheits-, veisen far exceed.

The method relies on the principle that, for example, include, first by the addition of wetting agents, which are surface effectively Katio.nen of quaternary ammonium salts, the hochmolekulare- aliphatic radicals, is applied to the dyeing vat an extraordinarily strong retentive effect on the vatted dye that Already when using larger amounts than a few 7th tenth of a gram per liter is almost equivalent to a reserving effect, and then by adding dissociable wetting agents that are effective through anions, e.g. B. fatty alcohol sulfonates, the dye-retaining effect is reversed more or less as desired in suitable amounts. According to this process, by adding the second aid, any degree of absorption of the dye initially retained can be achieved, and under certain circumstances it can even be completely absorbed from the liquor.

It can also give the consequent gradually, whereby it is achieved that the drawability of the dye is so stronger, the longer is colored.

The subsequent equalization can also be done in the same way be that first with the addition of a quaternary high molecular ammonium salt, that is, in a strongly peeling vat, colors, then one that acts on the surface through the anion Agent, e.g. the sodium salt of a fatty alcohol / malic acid ester, added, coloring agent replenishes and continues to color.

It is advantageous to prepare a stan solution of the quaternary ammonium salt in order to weaken the powerful effect and to be able to make the addition correctly. Stock solutions can also be prepared from the fatty alcohol sulfonate or the like. But this is less necessary. At the same time as the excellent leveling achieved by the process, a strong improvement in the dye penetration is achieved, even with twisted fabrics and heavily twisted yarns. The vats stand well, remain clear, show very little flower -, foam and at the same time have a strong net effect. The process is particularly advantageous for those companies in which dyeing is generally carried out on machines, but dyes that are difficult to level have hitherto had to be dyed in the vat because the machines ran too slowly for such cases.

Instead of the quaternary ammonium salts one can also use the analogous high molecular weight Use quaternary phosphonium compounds or tertiary sulfonium compounds.

In place of the salts of fatty alcoholsulphuric acid esters are generally used all compounds in question, the high molecular weight aliphatic or cycloaliphatic Residues and sulfuric acid ester groups or true sulfonic acid groups or phosphoric acid ester groups contain.

Particularly suitable and easily accessible, through. Cations that act on the surface Compounds are the pyridinium compounds with high molecular weight aliphatic radicals and analogous derivatives of other heterocyclic nitrogen bases, e.g. B. quinoline and isoquinolines. Of the compounds that are active on the surface due to anions, are shown to. the alkali salts of the sulfuric acid esters of the lower boiling components of the alcohols obtainable from coconut fatty acids by reduction as special suitable. This alcohol mixture. contains alcohols from about six to twelve carbon atoms.

Example i-indanthrene blue green FFB powder (Schultz, color tables, 7th edition, vol. 2, p. 127) in light color on bleached, mercerisi, ## rtem. Cotton thread. Quantity of goods: 50 kg. One prepares. The following vat: 100% water 6o'C, 151 sodium hydroxide solution 34'B #,: 2kg hydrosulphite powder concentrated, 50ooccm of a 4% aqueous solution of laurylpyridinium sulfate, 25g dye powder, vat in the main vat. The goods are taken in, swiveled for 20 minutes, opened, added to a 3% aqueous solution of the sodium salts of the fatty alcohol fatty acid esters from the low-boiling components of the alcohols produced by reducing the coconut fatty acids, and then returned to the vat and colors. Then -oog of dye in the Stanimküp- - "crl, -üpt, is added, and the dyeing is finished.

After the addition of the fatty alcohol sulfonate, the dye is still strongly retained. This Egalisier "virkung is maintained in the present case for better dye penetration, not more durcU larger quantities ZD FettalkoholsLilfonat reduced. Example 2 IndanthrenbrillantviOlett4RPulver (Schultz, S. aa 0. 128) ungehleichtem medium in deep coloration, mercerislertem cotton thread.

.a) Quantity of goods: 501, -g. Already pre-wetted. The following vat is used: ioool water 60 ° C, 151 sodium hydroxide solution 34 # 'B #, 3k, concentrated hydrosulfite powder, Soog indanthrenb, rilla, ntviOlctt 4R powder, vat in the stock pot, 500ccm laurylpyridinium sulfate soluble as in example i. You come in with the goods, draw 10 minutes, open and add 100 ccm of fatty alcohol sulfonate solution according to example j. The dyeing is continued for 30 minutes. The bath can be expanded even more by adding more fatty alcohol sulfonate. If the subsequent batches are to be dyed while the bath is running, no further addition of fatty alcohol sulfanate is required. Then 2oog of dye, vat, are added. It takes 1-12 hours to finish.

b) Quantity of goods: 5okg, dry. First, the dye bath used under a) is heated to 60 ° C. and 2oo cc of laurylpyridinium sulfate solution are added according to example i. The bath is changed in such a way that the dye contained in it no longer pulls. Since in this way the dyeing vat has become a net bath, one can put the dry goods in front of them by compressing and removing them, without having to fear an uneven loss of dyeing; because the areas that network more strongly are hardly stained. Utilization is over after 20 minutes. It is then added to the bath 400 ccm fatty alcohol sulfonate solution according to Example i and used again. The goods are now overall colors' DAS bath has again Färbacharakter. Then it is whipped and another 400 9 dye powder, already vat, is added. You continue to color and finish.

Just like anthraquinone dyes, indigo and indigoid can also be used Vat dyes as well as all other l 'Züpen dyes both in the I-lydrosulfitkVip .-- as well as in other vats. The same advantages are achieved.

Claims (2)

PATENTA N spRüciirt - i. Process for dyeing with vat dyes, characterized in that vat baths are used which contain dissocilable, surface-active compounds which are effective through cations, and later add surface-active, dissociable compounds with anions. 2. The method according to claim i, characterized in that that after the addition of the two surface-active aids still further Dye added to the vat.