DE933022C - Process for the production of fiber reinforcements containing effect threads - Google Patents

Description

Process for the production of fiber assemblies containing fancy threads The invention relates to the production of effect threads from native and artificial Protein fibers, such as wool, silk, casein fibers and the like, and fiber bandages containing such, whereby the effect threads seich due to a reduced affinity to acidic and neutral draw dyes. Ice cream procedures have already become known according to which the affinity of wool and silk for dyes means concentrated Sulfuric acid or mixtures of acetic anhydnide - acetic acid - sulfuric acid or aqueous, sulfuric acid formaldehyde solutions, with and without the addition of aromatic Sulfonation products, or by means of tannic acid, with the addition of tin, formaldehyde, Zn C12 and pyridine was decreased. Wool or silk fibers have also been suggested in order to reduce their dyeability by treatment with synthetic resins, with aqueous ones To treat solutions of glyoxal-bis-bisulphite or with alkaline hypobromite solutions.

The disadvantages of all of these methods are that either the wool or silk fiber is mechanically damaged, discolored or changed in handle or the reservation made is unsatisfactory. With some of the well-known Procedure if there is a strong odor nuisance, or it be special Equipment and solvent recovery systems are required. Most of the processes are also too expensive.

It has now been found that these disadvantages can be avoided, and d: one ate, opposite sour and. neutral dyes with excellent retention Effect threads can be obtained in that man- native and artificial protein fibers, thread or yarns with sulfamic acid or its derivatives or salts of these compounds or such containing addition compounds treated.

For example, according to the present invention, native or artificial protein fibers are impregnated with a solution of sulfamic acid, iminodisulfonic acid or their salts, freed from excess impregnating solution by centrifugation or pressing and dried as completely as possible at temperatures below 1000. The fibers are then subjected to a heat treatment at temperatures of from 120 to 175 °, preferably from 40 to 150 °, rinsed and dried.

Similar effects can also be achieved with organic sulfamic acids such as PhenyIsullfamic acid or sulfamic acid or with sulfamic acid and the like Addition compounds can be achieved. The impregnation can be carried out in an aqueous solution or in other solvents for sulfamic acid, its derivatives or salts, such as z. B. Formami: d, or in mixtures of these solvents with water, preferably at room temperature. To achieve an even impregnation Acid-resistant wetting agents can be added to these solutions.

In addition, substances can be added to the aqueous solutions which have a swelling effect on protein fibers and thus facilitate immunization. Such Quglmitte'1 are z. B. formic acid, acetic acid, urea and those in the French patent 794 75o listed substances formamide, acetamide, thiourea, -Phenol and the like. If the impregnation is carried out, for example, with an aqueous solution carried out by sulfamic acid, which is still o, 2 to 1 mol of urea or acetamide, based on: the amount of sulfamic acid added, the heat treatment is shorter Time, or at lower temperatures, e.g. B. already at ioo °, feasible. Besides if this increases the solubility of the sulfamic acid in the impregnation solution, see above that the 'impregnation even at room temperature without undesired crystal formation is possible - an addition of more than 1 mole of urea, based on the amount of sulfamic acid, has a detrimental effect on fiber strength.

The method according to the invention thus differs significantly of the already known, e.g. As described in British Patent Specification 648,883 Process for achieving fire resistance, where just a (high proportion of organic, N = reverberant bases is necessary (2 to 5 mol) to get the desired effect at all to achieve: The used solutions' can easily be used again for new ones Use impregnations. Of course, drying and heat treatment can be used to be carried out together; but it is better to do it in two stages Control over heat treatment is preferable. Effect threads and fiber assemblies containing such (can according to the present invention from natural or artificial protein fibers, thread or yarn are produced.

The reserved fibers or threads have acidic wool dyes a greatly reduced affinity, one more for direct and vat dyes or less strong affinity reduction; on the other hand, they are made of basic dyes more stained. Mixed fabrics, knitted fabrics or other fiber composites made from native or artificial protein fibers and / or other textile fibers, which according to the present Invention produced effect fibers result in piece dyeing white, or when using dyes with carbonization, especially vat and 'Chromating dyes @ pre-dyed fibers, colorful effects.

The effect is irrelevant, alkaline wallkecht and, if special precautionary measures are used, also carbonization-resistant. Wdlle retains its strength properties, its felting ability, as well as its feel and appearance, and moreover experiences a weight increase of 5 to 100 per cent. Another advantage of the process is that it can be carried out with the facilities generally used in the textile finishing industry. Example i Wool yarn was impregnated in a solution containing 20 percent by weight sulfamic acid and 0.2 g of a water-soluble isooctylphenyl polyglycol ether at 30 ' each, centrifuged to a dry content of 55% and then dried at 70 to 750. This was followed by heating to 160 ° for 2 minutes in a yarn drying oven, then rinsing thoroughly with water and drying. The weight increase was 6% and: the tear strength was still completely retained. This yarn is woven in equal parts with untreated wool to form a mixed fabric and the latter with acidic wool dyes such as alizarin light blue B (S c hu 1 tz, FarbstofftabeHen 1921, no. 1 1 87), azo acid red L (op. Cit. No. 105) , Echfsulfohschwarz F (op. Cit. No. 593), alizarin yellow G (chromed, op. Cit. No. 23o), colored. The treated yarn remains practically undyed. .

Example 2 -Wool yarn was made in a solution containing: 20% sulfamic acid; i2; 40 / o urea and 0.2 g of a water-soluble isooctylphenyl polyglycol ether impregnated 1 each at'35 °, freed from the excess of the solution by centrifugation, dried and heated to 150 for 5 minutes. The yarn had experienced a weight gain of 7 ? / O and reserved azorhodin 2 G (S ch u 1 t z, Dye Tables 292i, No. 40) completely.

Similar results are obtained if other bases are used instead of urea such as dicyandiamide or pyridine can be added. Example 3 wool yarn, which with 1% alizarin yellow G (Schultz, color tables 1921, no.23o) colored and chromed was impregnated as in Example i, from the excess of the impregnation solution freed and dried. It was then heated to 150 ° for 5 minutes, rinsed cold and dried; the weight gain was 6%. The shade of the coloring was unchanged and experienced no change in an overstaining attempt with aflizarin light blue B. Example 4 Pre-dyed with 1% Sandozenorange R (Schultz, Dyestuff Tables 1921, No. 1349) Wool yarn was treated as described in Example 13. It had weight gain of 7.8%, had an unchanged color shade and was light blue compared to alizarin B overcolourable. Example 5 Lightweight silk was impregnated as in Example i, squeezed to 49% dry matter content by means of a mangle, then dried and 2 Heated to 150 ° for minutes. The silk that remained bright white had weight gain Experienced from 70/0 and reserved Azorhodin 2 G completely. Example 6 Casein fibers were at 2o ° in a solution containing 18 weight percent sulfamic acid and 0.2 g of a water-soluble Isooctylphenylpolygily'kolät'her impregnated 1, Swung down to 520/9 dryness and dried at 50 °. Subsequently was Heated to 130 ° for 5 minutes, rinsed with water and dried. Those treated like that Casein fibers had gained 61/9 in weight and showed greatly decreased Affinity to Azorhodin 2 G. Example 7 A wool muslin fabric, the warp of which was colored Strips of effect threads produced according to Example 3 (with the ratio from untreated woolen threads to colored effect threads in the warp is 4: 1, was with the dye described in Swiss patent specification 199655 colored. A fabric with yellow stripes on a blue background was obtained. Example, 8 A wool yarn was at 30 ° in a solution containing 19 percent by weight sulfamic acid, 5 percent by weight of glacial acetic acid and 0.1% of a water-soluble isooctylphenyl polyglycol ether impregnated, freed from the excess of the solution, dried at 70 ° and then Heated to 115 ° for 1 hour. After washing and drying, the yarn had a Experienced weight gain of 6.7% and remained when overstaining with 0.5% Azorhodin2G practically undyed in the presence of the same amount of untreated wool. example 9 Wool yarn was treated exactly as in Example18, but with the impregnation solution instead of 5 weight percent glacial acetic acid contained 5 weight percent acetamide. That Yarn had gained 7.91 / o in weight and remained with overdye also practically white. Example io In a solution of 20% sulfamic acid and 10% urea in water, wool yarn was impregnated at 20%, after removing the excess dried by centrifugation at 70 ° and then heated to 100 ° for 1 hour. To after washing and drying, the yarn showed the same properties as that according to the example 8 treated. Example 1i A with 0.5% alizaride light gray BS (after chrome-plated, Schulltz, Dyestuff Tables 1921, No. 1195), pre-dyed woolen yarn was made up with a solution from 20% sulfamic acid, 10% urea and 1 g of a water-soluble isooctylphenyl polyglycol ether each '1 impregnated at 2o °. The product freed from the excess of the solution was at Dried at 70 ° and then heated to 100 ° for 10 minutes; she owned after rinsing and Drying, a good ability to reserve against acidic and chromating dyes. The weight gain was 7.40 / 0. Example 12 Wool yarn became own with a 451 / Solution of ammonium imidodisulphonate which has been adjusted to pH 1.5 with sulfuric acid had been set, impregnated at 5o ° and after removing the excess the solution dried at 70 ° and heated to 150 ° for 30 minutes. The practically uncolored Yarn had a 6% weight gain and a significant reduction in dye capacity Experienced. Example 13 Wool yarn was produced in an aqueous, 450/0 pyridine salt of the solution containing carbamidosulfonic acid (sulfourea) impregnated at 0 °, freed from excess of the solution by centrifugation and then Heated to 150 ° for 1 hour. The product showed a after washing and drying considerable reduction in affinity for acid dyes. Example 14 wool yarn, which had been pre-colored with 0.5% alizarin light gray BS (chromed) as in example i, impregnated and dried, but then at i20 ° for i hour heated. The weight gain was 6.8% and the yarn exhibited at Overstaining with chroming dyes is a good reserve. Example 15 A with o.511 / 9 Alizarinlidhtgrau BS (post-chromed) pre-dyed woolen yarn was mixed with a solution consisting of 19% sulphamic acid, 5% urea and 761 / o water impregnated at 20 ° and, after drying, heated to 1o5 ° for one hour. That, washed and dried Yarn that was 6.4% heavier than the starting product was made with the same amount untreated, undyed wool woven and this mixed fabric with 0.50 / a azorhodine 2 G overstained. A colored article with pure gray and red threads was obtained. -

Claims (3)

PATENT CLAIMS: i. Process for the production of fancy threads containing Fiber bandages, characterized in that those made of native or as effect threads Synthetic protein fibers containing sulfamic acid or its derivatives are used or salts of these compounds or addition compounds containing such treated have been. 2. The method according to claim i, characterized in that as effect threads those made of wool fibers are used, which are treated with an aqueous solution of sulfamic acid impregnated and subjected to a heat treatment after a drying process are. 3. The method according to claim i and 2, characterized in that-the effect threads are pre-dyed with carbonizing dyes prior to treatment with Sullfa @ minic acid. q .. The method according to claim i to 3, characterized in that a mixed fabric of untreated wool fibers and protein fibers treated according to the invention is used as the fiber structure. 5, method according to claim i to q., Characterized in that; that soluble swelling agents for proteins are added to the aqueous impregnation solution. 6. The method according to claim i to 5, characterized in that .der Sdlfamic acid solution is added as a swelling agent urea in amounts of up to 1 mole per mole of sulfamic acid.