DE745220C - Process for printing fibrous materials of vegetable or animal origin by printing printing pastes containing water-soluble dyes, catalysts and urea, and fixing with formaldehyde-containing water vapor - Google Patents

Description

It has been found that ₉ can fix water-soluble dyes in textile printing well to washing in exceptionally simple manner when the coloring agents by means of pressure pastes g kilogram least 180 urea, imprints, and then attenuates in the presence of formaldehyde. It is necessary, in the presence of an acidic catalyst or a catalyst which splits off acid during steaming, e.g. B. formic acid, lactic acid, ammonium phosphate or ammonium rhodanide to work. These catalysts can be added to the printing paste, and volatile acids can also be added to the formaldehyde vapor.

The present process can be applied to fibrous materials made of cellulose or contain cellulose, such as cotton, regenerated cellulose, ζ. B. viscose rayon, as well as fibers of animal origin, e.g. B. natural silk or wool, or still on Synthetic fibers, which the properties of animal fibers in more or less pronounced Own way, be applied.

Both substantive dyes and acidic coarse dyes are used as dyes and basic dyes.

Among the acidic wool dyes are the acidic anthraquinone dyes because of them Liveliness and the metal-containing, pre-

the chrome or copper ones Azo dyes are particularly suitable because of the fastness properties of their dyeings. It has been shown that the commercial dyes containing a larger amount of alkali salts contain inorganic acids as adjustment agents or diluents for the execution of the present process are often unsuitable because of their high alkali salt content in connection with other electrolytes added as a catalyst to the drude paste a pronounced salting-out, opposite to the distributing effect of urea Have an effect, thereby adversely affecting the outcome of the procedure. So if you want to use the present procedure work, it may be useful to adjust or blend the dyes to use ammonium salts instead of the usual common or Glauber's salt. Man i then receives dye preparations which, for I the present process, have two essential I Have merits. On the one hand, the i use of such preparations enables | any further addition of catalysts to the j printing paste or to the formaldehyde solution from j watch, whereby the execution of the method is simplified. On the other hand, the | The above-mentioned harmful effects of a large excess of electrolytes are avoided, so that much better prints can be obtained.

To increase the fastness properties, the dyes can be converted to a suitable, At the time of the procedure, they will be subjected to further treatment, which will result in the Authenticity increased, e.g. B. treatment with metal salts, such as copper salts, chromium salts, Nickel salts or cobalt salts. j

The fixation of the soluble dyes improves with an increasing amount of urea, and on the other hand occurs with an increasing amount of urea add an increasing stiffening of the parts, which, however, is partly through ^! The addition of soft mowing agents can be counteracted. ,

For the process to be carried out properly, the steaming must be carried out with moist steam. If you have a device in which 1 the steam has an insufficient moisture content, it is advisable to start the goods immediately before steaming; damp, what z. B. can be done by dusting j water. After steaming: the goods can be calendered over ge | Conduct or through heated metal surfaces | pass a highly heated room through it in order to further complete the condensation of the urea with formaldehyde. The thickener can be obtained by the | working method lying on the fibers | I get pinned. It can therefore be useful. To use thickeners that have little body per se, z. B. tragacanth ¹ or locust bean gum.

It is known to print cellulose fibers with printing pastes which, in addition to the water-soluble dye and the acidic catalyst! sator urea per g contain kg of printing paste in lower amounts alb j 180 \ UNCT the printed Uewebe with formaldehyde-I to post-steaming. The prints obtained in this way are less washfast than the prints produced by the present process.

Example ι

A viscose fabric is made with a printing paste containing per kilogram

30 g of the green chromium compound of the azo dye from diazotized! i-Amino-2-oxy-4-aminobenzene and 2-aminonaphthalm-6-surfonic acid,

260 g water,

iog lactic acid,
200 g urea and

500 g aVüO / oige carob flour thickening.

printed, dried and passed twice through a Mather plate for 7 minutes, in which formaldehyde solution is injected using a steam atomizer nozzle. On that is rinsed and soaped if desired. '

A print with good Xass fastness properties is achieved, while in the absence of formaldehyde the dyes are only very poorly fixed.

100 Example 2

Cotton sateen is printed with a printing paste containing per kilogram

30 g of the copper compound of the azoi agent from 2 moles of diazotized ι-amino-2-oxybenzene-5-sulf 011-acid and the secondary condensation compound of 1 mole of cyanuric chloride and 2 moles of the 2-amino-5-oxynaphthalene-7-sulfonic acid,

260 g water,

200 g urea,
iog monoammonium phosphate and ^U 5

500 g of 60% tragacanth thickening.

After drying, the pressure is reduced by a single pass through a Mather-Platt damper, is injected into the formaldehyde solution. The pressure points very good fastness properties.

Example 3

Cotton fabric is printed with a printing paste of the following composition:

30g Rhodarnin G (Schultz, Dye Tables, 7th Edition, No. 865),
360g water,
200 g urea,

iog monoammonium phosphate and
400 g 2 ¹ /2% locust bean gum thickener.

After drying, the goods are twice for 7 minutes through a Mather-Platt steamer taken, with a formaldehyde solution in the steamer by means of a steam atomizing nozzle is injected. An extremely vivid and washfast print is obtained.

Example 4

Cotton calico is made with a printing paste containing per kilogram

30 g Brillantkitonrot B, (Schultz, Dye Tables, 7th Edition, No. 863), 200 g urea,
220 g water,

500 g 4% methyl cellulose thickener
and

50 g 20% monoammonium phosphate solution

printed. The printed fabric is dried and as in Example 1 in the presence dampened by formaldehyde.

A very vivid print with good wash fastness is obtained.

Example 5

Cotton fabric is printed with a printing paste of the following composition:

30g direct brown M (Schultz, color tables, 7th edition, No. 412), 34S g water,
200 g urea,
iog triammonium phosphate,
15g potassium copper tar stepped and
400 g 3 o / o carob bean gum thickening.

1000 g.

After steaming in the presence of formaldehyde, do this in the same way as in example ι happens, a print of good fastness properties is obtained, which by With the use of copper salt 'still essential be improved.

Example 6

Woolen muslin is printed with the following printing paste and then in steamed in the same way as in example 1 in the presence of formaldehyde:

30 g of the azo dye from 1 mol of tetrazotized 3, 3'-diamino-4, 4'-dimethyl-i, i'-diphenylmethane and ^ ⁰ 2 mol of i-oxynaphthalene-5-sulfonic acid,

180 g urea,

140 g water,

600 g 6% tragacanth thickening and
50 g 20% solution of monoammonium phosphate.

1000 g.

The prints obtained are fixed in a more washfast manner than in the case of the usual prints in the presence Large amounts of organic acid with subsequent steaming in the boiler. Apart from that of which means shorter and uninterrupted work in the Mather-Platt a significant advance over the longer and separately carried out Steaming in the boiler, which is inevitable when working according to the usual procedure is.

Example 7

100 parts of the azo dye from diazotized! 1-Amino-4-methylbenzene and ι mol of the secondary Condensation compound of 1 Mo] cyanuric chloride, 1 mol of i-amino-8-oxynaphthalene-3, 6-disulfonic acid and 1 mole of dehydrothiotoluidinesulfonic acid are with 60 to 80 parts of ammonium sulfate or monoammonium phosphate mixed. The dye preparation produced in this way is with no further additives Tragacanth thickening printed on cotton calico and, as indicated in Example 1, fixed by steaming twice in the Mather-Platt in the presence of formaldehyde.

Prints with very good fastness properties are obtained.

Claims (2)

110 claims: i. Process for printing fibrous material of vegetable or animal origin by printing printing pastes containing water-soluble dyes, catalysts and urea, and fixing with formaldehyde-containing steam, characterized in that printing pastes used, which contains an acidic or acid-releasing catalyst when steamed and at least 180 g of urea in the Kg included. 2. The method according to claim i, characterized in that printing pastes, imprints made using dye preparations which are ammonium salts instead of the alkali salts commonly used as diluents contain strong acids. To distinguish the subject of the application from the state of the art, the granting procedure the following publications have been considered: British patents No. 435 868, 473304, 437642; French patents .. No. 794272, 46553, addition to 7942.