DE1027630B - Process for the production of textile fabrics ready for use - Google Patents

Description

GERMAN

The present invention relates to a method for the production of textile fabrics ready for use from natural or artificial threads; It consists in treating the threads with aqueous solutions containing polymerized amides of unsaturated lower fatty acids, methylol compounds capable of forming carbamide resins and catalysts which accelerate the formation of carbamide resins, then drying them at temperatures below 100 ° C. and then drying them before or after Interweaving subjected to a heat treatment at temperatures above 100 ^° C.

Polymerization products are the main polymerized amides of unsaturated lower fatty acids of acrylic acid amide and methacrylic acid amide into consideration. Among those used to form carbamide resins Capable methylol compounds are reaction products of formaldehyde or formaldehyde releasing compounds, such as paraformaldehyde, with urea, thiourea, melamine, Guanidine, dicyandiamide or similar compounds. As catalysts that promote the formation of the Carbamide resins are able to accelerate, ammonium salts of strong acids, such as. B. ammonium sulfate and ammonium nitrate, and free organic acids, such as. B. lactic acid and glycolic acid called.

Suitable proportions can easily be determined by preliminary tests; from the polymerized Amides and methylol compounds are generally used in equal parts by weight, of the catalysts in smaller amounts.

The threads are treated with the aqueous solutions containing the specified components in a manner known per se; the same applies to drying the threads at temperatures below 100 ° C and for the heat treatment of the threads or the fabrics made from them at temperatures over 100 ° C.

The treatment is preferably carried out on warp sizing machines with cylinder drying, since here the high temperature necessary for the formation of the carbamide resins already during the sizing in one and the same operation is achieved, so that there is a post-condensation of the settled Chain woven goods are superfluous.

The aqueous solutions to be used according to the invention with the specified three components can also contain small amounts of native starch: this results in increased stiffness of the fabric.

It is also noteworthy that the proposed method does not obscure dyed goods or graying of the coloration.

Method of manufacture
ready-to-use textile fabric

Applicant:

Paint factories Bayer Aktiengesellschaft, Leverkusen-Bayerwerk

Dr. Herbert Gensei and Hans Herx, Leverkusen,
have been named as inventors

example 1

A warp which contains 50 threads of viscose rayon with a titer of 100 denier per 1 cm is placed on a cylinder dry sizing machine treated by dipping and squeezing with a 40 ° C solution, which contains 10 g of polyacrylic acid amide, 10 g of dimethylolurea and 6 g of ammonium nitrate per liter; afterward the chain is first dried in stages below 100 ° C and then briefly to 110 ° C reheated. The chain can be woven into a lining, for example, without difficulty; the lining then has a slight stiffness which is washable and shows only a slight stiffness in the warp direction Residual shrinkage after wetting.

Example 2

A brightly colored woven warp made on 1 cm of 40 threads of simple cotton yarn with the metric number 30 is treated on an air-dry sizing machine with a solution that contains 6 g Contains polyacrylic acid amide, 20 g potato flour, 15 g dimethylolurea and 6 g lactic acid. Afterward the chain is dried at about 70 ° C. The chain is then woven into an apron fabric, and the fabric is then heated to 130 ° C for 3 minutes. The apron fabric has a full, light look stiff handle that is very resistant to repeated washing.

Before the known method of making chair-ready fabric, in which in addition to forming methylol compounds capable of carbamide resins ammonium or amine salts of styrene-maleic acid copolymers are used, the method of the present invention has the advantage on. that this is a nuisance by ammonia or amines, which during the known process the preparation of the solutions and especially

709 959/397

can easily occur during the drying of the treated goods, can no longer be expected. Opposite to such known processes for the production of ready-to-chair fabrics based on starch, Cellulose ethers or polyacrylic acid esters are made, the process according to the invention is distinguished characterized in that it leads to finishes of particularly high wash resistance and at the same time the resistance to shrinkage of the fabric in the warp direction is significantly improved.

Claims (1)

PATENT CLAIM: Process for the production of ready-to-use textile fabrics from natural or artificial threads, characterized in that the threads with aqueous solutions, the polymerized amides unsaturated lower fatty acids, methylol compounds capable of forming carbamide resins and catalysts which accelerate the formation of the carbamide resins, treated, then dries at temperatures below 100 ° C and then before or after the interweaving of a heat treatment subjected to temperatures above 100 ° C. Considered publications:
German Patent No. 895,436;
French Patent Nos. 815 908, 827 059; U.S. Patent No. 2,469,408. © 709 959/397 4.58