DE627468C - Process for printing vegetable fibers - Google Patents

Description

Process for printing vegetable fibers is the subject of the patent 626 862 is a process for printing vegetable fibers, which consists in that vat or sulfur dye preparations are used for this purpose, which oxyanthraquinones or those reduction products of the same which still contain oxygen in the ms position own.

It has now been found that (in this process the oxyanthraquinones or their reduction products in whole or in part by anthraquinone sulfonic acids or carboxylic acids or substitution products or salts thereof or by oxygen-containing Let reduction products replace these bodies.

The preparation and type of dye preparations, the applicable printing method as well as the are the same by the method to be achieved effect, as indicated in Patent 626,862. In many cases there is even a superiority of the anthraquinone sulfonic acids or carboxylic acids etc. over the oxyanthraquinones, which is probably due to the water solubility of the former. Mixtures of different aminoanthraquinonesulfonic acids or carboxylic acids or their salts with one another or mixtures of their still oxygen-containing reduction products or mixtures of bodies of both types with or without the addition of anthraquinone, aminoanthraquinones or even oxygen-containing reduction products of these bodies are often expedient. The simultaneous use of hydrotropic Means even with the present method in many cases - advantages. potassium sulfonic acid, 72g of a thickening of the following composition: 6o g wheat starch, 1509 water, 60 g British gum powder, 26o g industrial rubber i: i, i70 g tragacanth 65: 1000, 1509 potassium carbonate, 150 g sodium formaldehyde sulfoxylate 1000 g, is used in the usual way for printing. The prints are dampened with a damp cloth and developed with chromium-potassium-acetic acid and by soaking at the boil. A print produced in this way on cotton is considerably more powerful than a print obtained according to the same procedure, but without the addition of potassium anthraquinonesulphonate. A deep pressure is also obtained more quickly, ie the fixing speed is considerably improved.

The anthraquinone-i = sulfonic acid potassium can also be obtained from others Sulphonic acids and, carboxylic acids of the anthraquinone series - replace, z. B. by anthraquinone-2-sulfonic acid Sodium, sodium anthraclinone disulfonic acid, anthraquinone-2-carboxylic acid.

Example 2 In example i, the dye mentioned there is replaced by that of naphthooxythiophenecarboxylic acid of the formula by oxidation in an alkaline solution the procedure of example z of the patent 239 093 available dye replaced, so you get with addition. from. anth, rachinon- 2-sulfonic acid sodium or anthraquinone 2, 7-disulfonic acid sodium also color fabric pastes that print in a short time fix. Example 3. The -addition of anthraquinone-2-carbon- acidity to the printing paste according to example i causes at 3, q., 8, 9-dibenzopyrenquinone as well as an increase in dichloroisoviolanthrene the intensity. - Example d. If in example i the color material by. Drs-p-anisoyl-i, 5-diamino-4, 8-di- ox-yantfiracfiinon replaced and the printing paste 2,6-Dioxyanthraquinone-3, 7-disixlfonic acid (er obtainable by sulfonating anthraflavin acid with 2% oleum at i2o ° C) added, the result is also better fixing and deeper prints than without this Additive. Command 5 A mixture of ao parts by weight 6, 6'-diethoxy-2, .2'-bisthionahthenindigo as aqueous paste, 40 parts by weight of crude glycerol 88 percent, 2 parts by weight i-sulfonic acid potassium will: at 70 ° C with 5U parts by weight of ammonia solution 25pro- and 10 parts by weight of hydrosulphite reduced adorns. If necessary, you can take 5 to 10 Most important sodium benzenesulfonic acid. or equal parts of an arid hydrotropic co- add tels. - Then _-uv is made so far steams until the paste has a content of i3 % having. A cotton print produced with the help of this paste according to the usual procedure turns out to be considerably livelier after a short steaming period than when using an aqueous paste of the same dye.

Even with padding, especially in the case of the procedure, it is not evident Pre-reduced to block, with subsequent steaming in the Mather-Platt, that the so The paste produced provides more even and deeper blocks than the aqueous paste Paste without the additives mentioned. Here, too, those mentioned in example i can be used use other anthraquinone derivatives.

Instead of the 6, 6'-diethoxy-2, 2 -bisthionaphthenindigo can be also other dyes, e.g. B. 6, 6 "-Dichlor-4, q .'-dimethylbisthionaphthenindigo, use.

Example 6 100 parts by weight of a dye paste, which in 100 parts by weight 2o parts by weight of 6, 6'-dichloro - q., Q '- diniethylbisthionaphthene indigo, 5 parts by weight sodium dimethylsulfanil, q.o parts by weight of glycerol, 2 parts by weight of 2,6-dioxyanthraquinone-3, 7-disulfonic acid or anthraquinone-2-carboxylic acid or i-aminoanthraquinone-2-sulfonic acid contains, za weight parts of water and 8o parts by weight of a thickening mixed, which contains the substances mentioned in Example i, with the. Difference, that here instead of -266 @ parts by weight of rubber i: i i 6o parts by weight. same and ioo @ parts by weight of glycerine can be used. The printing paste thus obtained is used to print in the usual way, and: the print will be like. described above developed. A print made in this way on cotton falls significantly stronger than a. Do the same thing, but without the addition. of the mentioned Pressure obtained from anthracj.inonderivate.

Claims (1)

PATENT CLAIM Method of: Printing: Vegetable lichen fibers, characterized that: man- for this purpose vats- or Sulfur dyes used. which instead of or xieben. Oxy anthraquinones or reduction products the same substituted - or - unsubstituted tuated anthraquinone sulfonic acids. or -carboxylic acids or salts: the same or such reduction products of these bodies, which still bn oxygen in ms position sit,. contain.