DE963503C - Method for reserving the synthetic fiber content of mixed textile material of animal fibers and polyamide fibers - Google Patents

Description

Method of reserving the synthetic fiber fraction of mixed Textile material made from animal fibers and polyamide fibers It is known that polyamide fibers by treating with sulphurized Ph: enol derivatives against acid, metalizing and metal complex dyes (hereinafter referred to as "acidic wool dyes" for short) are reserved can be. In order to bring the sulphurized phenols into solution: it is necessary, however a, weakly alkaline bath, which has the consequence that mixtures of cellulose and Polyamide fibers with sulphurized. Phenols can be treated with one treatment Mixtures of animal fibers and polyamide fibers, on the other hand, run into difficulties bumps. Mixtures of animal fibers and polyamide fibers are known to be mostly used colored in an acid bath. In the presence of acids, however, the sulphurized phenols are and are thereby largely forfeited of their effectiveness. Well can This takes this unpleasant property of the sulphurized phenols into account be that one in., neutral to weakly alkaline bath and / or with addition from. Wolfl protectants and dispersants colors, possibilities of which in particular the latter made the dyeing process cumbersome and expensive. Included. is first of all to note, that when using one of the last-described procedures the handle of the wool harder even with the addition of wool preservatives and gets rougher and more modern. Claims are not sufficient.

It is also already known that larger amounts of sodium sulfate are added or sodium chloride to the liquor for removal. .acid dyes of polyamide fibers or can be used to slow down the dyeing process on such fibers. L.nese effects go beyond a negligible extent. That's why Sodium sulphate and sodium chloride, not to be regarded as actual reserves. It is possible to use more than 50 g of sodium chloride per liter of dye liquor Dyeing mixtures of animal fibers and polyamines, which have a weak reserve effect to achieve the latter; but this is the absorption of the dye on the animal fibers are almost as slowed down.

There was therefore a lack of a method which would enable a satisfactory Reserve of polyamide fibers when dyeing in the same bath with animal fibers until it was surprisingly found that water-soluble rhodanides those summarized in groups I a, II a and II b in the Periodic Table of the Elements Metals with an atomic number not exceeding 56 or ammonium when dyeing with acidic well-being dyes a strong, specifically reserved effect exercise on the polyamide fibers. This is where the unpleasant fall described above occurs of the reserve agent in the dye liquor or. an impairment of the handle andr Respect of the animal fibers.

It has also been shown that baths with mixtures of water-soluble Rhodanides in the Periodic Table of the Elements in Groups Ia, Ha. And IIb summarized metals with an ordinal number not exceeding the number 56 or of ammonium with a water-soluble chloride of a metal from the group II b with an ordinal number that does not exceed 48 in some cases Can have a reserve effect: 33i- Reservation. Of the polyamide fibers can hserbe, i already with additions of 5 to 20 g of the salt or the salt mixture per liter of dye liquor to be achieved; at these salt concentrations. the absorption of the dyes not yet slowed down on the animal fibers. By adding dispersing agents Agents for the dye liquors can be the effect of the added Rhodanides or the Salt mixture can still be increased so much that when dyeing polyamide wool blend fabrics with a large number of acidic wool dyes. an almost complete .reservation the Pdlyamid; -fibers is achieved, the dye being exhaustive on the animal Draws fibers. A particularly suitable bath is characterized by the content of at least 5 g and at most 20 g per liter of one of 3 parts ammonium, rhodanide, 1 part zinc chloride and; 1 part of a mixture consisting of a dispersant. as acidic dyes, de are suitable for the preparation of the dye liquors described and: their color index numbers from the 1st edition of the Color Index, Bradford 1924 (C. I.), taken from or in the "First Supplement of the Color Index" (S. C. I.) or in the 7th edition of S c h u 1 t z, color tables, supplementary volume 'I, Leipzig 1934 (S: F.), are, for example: Xylene light yellow 3 GS (C. I. No. 639), xylene light yellow 2 G (C. I. No. 639), tartraphenin (C: I. No. 64o), Xylengelb S (C. I. No. 637), - Xylenli.chtgelb R (C. I. No. 639), Xylenechtorange G (C. I. No. 27), Azorhodin 2 G (C. I. No. 31), Azorhodin 6 B (C. I. No. 57), brilliant sulfone red B (C.I. No. 32), brilliant sulfone red 5 B (C. I. No. 32), brilliant sulfone red 10B (C. I. No. 54), Ponceau R (C. I. No. 79), Carmoisine conc. (C.I. No. z79), acid bordeaux B (C. I. No. 88), xylene red B (C. I. No. 748), xylene violet RL (C. I. No. 53), xylene cyanol FF - (C. I. No. 715), xylene blue VS (C. I. No. 7I2), alizarin light blue B (C. I. No. r054), xylene-chtgriin B (C. I. No. 735), alizarin light green GS (C. I. No. 1o78), Azorubinol 3 GS (S.CI, page 28).

The following are mentioned as metallization dyes: Alizarin red SZ (C. I. No. 103-4), Omega chrome brown 2 R (C. I. No. 98), Omegach.romblau FB (C. I. No. 179), Omegmhromechtblau @ B (C.1. No. 179), Omegadhromrot G (S. C. I., p 48), Om "egachromcyanin GR (S.F., page 115).

Metal complex compounds; with which dye liquors are produced can, which reserve the polyamide fibers, are z. B. the chromium compounds of azo dyes which - according to German patent specification 282 987 from diazatized 1-oxy-2-aminobenzenes, o-amino-oxynaphthalene or diazotized 2-anuaobenzene-1-carboxylic acid or from the derivatives of these bodies and residues of 1-oxybenzene-2-carboxylic acid or their derivatives may contain chromium compounds; like, them through Treating A_zo dyes. which chromable groups] - contain in the molecule, obtained with alkaline chromium oxide solutions according to the German patent 338o86 will.

The following examples illustrate the invention. Included the parts are parts by weight, the percentages are percentages by weight; the temperatures are given in degrees Celsius, and the color index numbers are, as mentioned, taken from the 1st edition of the. Color Index, Bradford 1924. Example i In tifier Dye liquor, consisting of r, i parts of alizarin.light blue B (Color Index No. 1054) ,: 2 Parts of concentrated sulfuric acid, 40 parts of ammonium thiocyanate, 40 parts of zinc iodide and 8,000 parts of water, zoo become parts of one thing: half of it is made of wool and the other half made of polyamide fibers. existing mixed tissue at cooking temperature digested, the wool fibers dyed blue be that synthetic Polyarnldfibres, however, remain reserved.

EXAMPLES If the dye liquor from Example i is replaced by: one made from 1.3 parts of xylene fast green B (Color Index No. 735), 2 parts of concentrated sulfuric acid, 64 parts of ammonium thiocyanate, 16 parts of a dispersing agent and 8,000 parts of water a mixed fabric, whose wool fibers are dyed green, but whose polyamide fibers are reserved. EXAMPLE 3 100 parts of a mixed fabric consisting of two-thirds of wool fibers and one-third of polyamide fibers are placed in a dye liquor at 50 ° which consists of 2.75 parts, the chromium complex compound of i-oxy-2-aminethenzene-4, 6th diazotized by coupling -disulfonic acid with 2,4-dioxyquinoline available: Mohoazo dye, 6 parts of concentrated sulfuric acid, 8o parts of ammonium thiocyanate and 8oöo parts of water be available.

The temperature of the bath is slowly increased to 100 °; colors i Hour at boiling temperature. "After the dyeing process is finished, the .. mixed fabric, its wool fibers are dyed red, while its polyamide fibers. reserved are :, rinsed and dried. -When replacing the parts of ammonium rhodaniid with a mixture the end. 40 parts of ammonium rhodium anide and 40 parts of zinc bromide or by eiirr. such from 48 parts of ammonium rhodanide, 16 parts of zinc chloride and 16 parts of a dispersant one obtains the same effect. -One also: good reserve effect is maintained by Replacement of the dye in the example by the chromium complex compound. diazoterter i-oxy-2-amirw-4-chlorobenzdl-6-sulfonic acid and i-phenyl-3-methyl-5-pyrazolone-3'-sulfonic acid produced monoazo dye ..

Example 4 100 parts of one made from two thirds of wool fibers and one third Polyamide fibers are made of mixed fabrics in a dye liquor consisting of i, 5 parts Omegachromrot G (First Supplement of the Color Index, p.48), 2 parts Acetic acid, 80 parts ammonium rhodium anide and 8,000 parts water, colored in the way dä.B the tissue is brought in at 50 °, the temperature of this bath slowly to 100 ° drifts and holds at 100 ° for 1/2 hour. Thereupon the dye bath. 2 parts 85% ge Formic acid added; it is cooked for another 1/2 hour. The: dyed material, whose wool fibers are dyed, but whose polyamide fibers are reserved " now: bath like him, after adding 0.75 parts of potassium dichromate, boiled for one hour, then rinsed and dried.

Replace the 8o parts of ammonium rhodium with a mixture of 4o Parts of ammonium rhodanide and 40 parts of zinc iodide or one of 64 Parts of ammonium thiocyanate and 16 parts of a dispersant give one very similar effect.

Example 5 A mixture of 50 parts of a fine natural silk fabric and 5o parts of a fabric, made of polyamide fibers at 4o to 5o ° in a dye liquor, Consists of 0.9 parts Brillantsulfonrot 5 B (Color Index No. 32), 2 parts 85o / biger Formic acid, 48 parts of ammonium thiocyanate, 16 parts of zinc chloride, 6 parts of one D. dispersant. and 8,000 parts of water. The dye bath becomes slow to 100 °, heated and for 45 minutes at this. Temperature held. The two Fabrics are then rinsed and dried; the natural silk is dyed red, while the polyamide fiber fabric is undyed.

The same effect is achieved when preparing the dye liquor only 8 parts of a dispersant are used.

Example 6 10 parts of a polyamide fiber strand are in a dye liquor; consisting of o, i part alizarin light blue B (Color Index No. io54), o, 2 parts more concentrated Sulfuric acid, 8 parts; ammonium: rhodanide and; 800 parts of water for 45 minutes 'cooked. The strand is then rinsed; it is only imperceptibly dirty, almost the entire amount of dye is still in the dyebath.

- If you repeat this experiment with a dye liquor consisting of o, i part alizarin light blue B (Color Index. No. io54), o, 2 parts more concentrated Sulfuric acid and 800 parts of water, the result is a beautifully blue-dyed polyamide fiber strand; -The dye bath is almost completely exhausted. Example 7 In a dye liquor, consisting of 0.5 parts tartraphenin (Color Index No. 64o), 2 parts concentrated Sulfuric acid, 80 parts of sodium rhodanide, and 8,000 parts of water. zoo parts one half made of wool fibers and the other half made of polyamide fibers existing mixed fabric. at boiling temperature digests, where - at the wool fibers been dyed yellow, the polyamide fibers, however, reserved @bleliben.

Example 8 In the above example, the 80 parts of sodium rhodanide are replaced 80 parts of potassium rhodanide give the same effect.

Example g In Example 7, the 0.5 parts of taxtraphenin are replaced by i part Azorhodi-n 6B (Colou.r Index No. 57) or i part alizarin light blue B (Co, -our index no. Io 54). in this way a mixed fabric is obtained, its polyamide fibers are reserved; while the wool fibers are colored red or blue. To the dyeing can: exhausted dyebaths, which - in Rhodannd according to the invention or salt mixture or a mixture thereof with dispexing agent, again for To dye. can be used, provided that the required amount of dye is added; they again show the reserve effect described.

But it is also possible to use the dyeing according to Examples i to g reserved polyamide fibers to be dyed afterwards by placing them in a fresh Bath are brought, which - no - inventive @ rhodanide or salt mixture or salt-dispersant mixture contains. In? such a-, the bath will be previously reserved fibers are now dyed without hesitation.

Claims (3)

PATENT CLAIMS: i. Process for reserving the synthetic fiber content of mixed textile material made from animal fibers and polyamide fibers using inorganic salts, characterized in that the dye liquors charged with acid, metallization or metal complex dyes and acids are water-soluble rhodanides of the periodic table of the elements in groups I a , II a and II b combined metals with an atomic number not exceeding the number 56 or ammonium; or mixtures of two or more: such salts, or mixtures of one or more. such salts and a water-soluble chloride of a metal from group II b with an atomic number not exceeding 48 and optionally also adding dispersants to the solutions thus obtained. 2. The method according to claim i, characterized in that the water-soluble Salts or salt mixtures or their mixtures with dispersants are used as dye liquors in quantities of at least 5 and at most. 20 g, preferably 8 to 12 g, per liter clogs. 3. The method according to claims i and 2, characterized in that as Addition to the: dye liquors a mixture of 3 parts ammonium rhodide, 1 part zinc chloride and i part of a dispersant is used.