DE742572C - Process for printing textile fabrics in planographic printing - Google Patents

Description

Process for printing textile fabrics in planographic printing It is known to use water-soluble dyes with fatty color thickeners, e.g. B. linseed oil varnish to drive this color paste using flat and letterpress printing on fabric and fixation using steaming or post-treatment (patent specification 123 69z) water-soluble dyes also color the non-printing areas when wiping the stone. According to patent specification: 27-526, this disadvantage is eliminated by using water-insoluble vat dyes and fixing the prints by treating them with alkali and reducing agents.

It has now been found that you can also use water-soluble dyes. Success in planographic printing (stone, offset) on fabrics can be relied on, if one these not in the form of the water-soluble alkali salts, but the water-insoluble ones or sparingly soluble salts with amines or ammonium compounds. The dye becomes from these insoluble salts when steamed despite their insolubility in water and fixed on the fiber despite the presence of the fatty color thickener. This fact was not to be seen, since in the usual fabric print with the soluble ones Alkali salts of these dye acids, for example the acidic wool dyes and substantive dyes, for best solution of the dye in the aqueous printing paste Value is placed and this solution in the usual working methods of printing ink preparation by adding suitable solvents such as triacetin or thiodiglycol, promoted is used to achieve good fixation and high color strength of the prints. The insoluble ones Salts, on the other hand, are made with fatty binders, without the addition of dye solvents, rubbed and in the usual way in stone or offset printing on the textile fabric imprinted. The print is perfect because a transfer of the water-insoluble Dye in the wiping water does not take place and thus the non-printing areas stay clean. The fixation is carried out by steaming the printed goods. A subsequent wet treatment can be carried out to remove the fatty binder from the To remove textile fabric again or to improve the authenticity of the dyeing.

Amines or ammonium compounds are compounds of the aliphatic, isocyclic or heterocyclic series into consideration, such as methylamine, ethylamine, Trimethylamine, isohexylamine, octadecylamine, dicyandiamidine, guanidine, diphenylguanidine, Cyclohexylamine, dycyclohexylamine, aniline, toluidine, diphenylamine, trimethylphenylammonium hydroxide, Triaminobenzene, chloroanilines, mono- and diaminophenols, benzidine, naphthylamine, Piperidine. The more difficultly soluble the salt from the compound and the dye acid the less the risk of bleeding when wiping the printing plate. The water-insoluble dye acid amine salts are produced, for example by reacting the water-soluble alkali metal salts of the dye acid with the water-soluble ones Salts from the, amines. and organic or inorganic acids, the water-insoluble The dye acid amine salt precipitates, can be filtered and washed out. To. to the Drying the precipitate can be rubbed with the fatty binder will.

The usual fatty binders for stone and offset printing are used suitable, e.g. B. fatty oils, tall oil, varnish, mineral oils. For fixing the dyes the printed goods are steamed, whereby the amine salt of the dye acid splits and the dye is absorbed onto the fabric. After this. The goods are washed by steaming, to remove the binding agent from the fabric again. When washing become expedient suitable network and distribution means are also used. After washing or during Washing can also include a treatment with agents that reduce the authenticity of the staining increase e.g. B. metal salts or formaldehyde.

The present printing process expands the possibility of printing of textiles according to the method of planographic printing is very important, in that it the application of the large class of acidic dyes and substantive dyes Permitted on all those types of fiber that are compatible with these dyes. the have the usual fabric printing processes printed, for example on natural silk, Wool, cotton, rayon and rayon made from regenerated cellulose.

Example i drew dye No. 23o (Schultz, Dye Tables, 7th edition), dissolved in 50 cc of water, into the solution while stirring 25 g of an aqueous solution of hydrochloric acid. Diphenylguanidine (containing 3011, base) was added. The precipitate is filtered off, dried at 50 ° and powdered. 40 g of this dye salt are carefully rubbed with 60 g of linseed oil varnish on a three-roller mill. The printing paste obtained in this way is used to print a fabric made of natural silk or wool on the offset printing machine. The printed fabric is steamed for 1/2 hour in moist steam without pressure. It is then rinsed in lukewarm water to which 2 g of fatty alcohol sulfonate per liter have been added until the excess printing paste has been removed from the fabric, and then dried. A vivid, yellow print is obtained. Example 2 The insoluble dye salt is prepared as follows: 10 g of dye No. 189 (S chu 1 tz, loc. Cit.) Are dissolved in 500 cc in water, and 28 g of an aqueous solution of hydrochloric acid diphenylguanidine (containing 30% Base) added. The precipitate is filtered off, washed and dried. The printing paste is, as indicated in example i, prepared, printed on natural silk and treated further. A vivid orange print of good fastness to washing is obtained.

Example 3 The insoluble dye salt is prepared as follows: 10 g of dye No. 539 (S chu 1 tz, loc. Cit.) Are dissolved in 500 cc of water, 34 g of an aqueous solution of hydrochloric acid monohexylamine (containing 22 ' /, Base) was added. The precipitate is filtered off, washed and dried. The production of the printing paste, the printing on natural silk and the aftertreatment are carried out as in example i. A vivid, scarlet print is obtained. EXAMPLE The insoluble dye salt is prepared as follows: 10 g of the dye obtainable by condensation of benzaldehyde-2, q-disulfonic acid with dibenzylaminobenzene and oxidation are dissolved in 500 cc of water and, with stirring, 1 9 g of an aqueous 1 solution of hydrochloric acid diphenylguanidine ( containing 301 /, base) added to the solution. The precipitate is filtered off, washed and dried. The production of the printing paste, the printing on natural silk and wool and the aftertreatment are carried out as indicated in example r. A vivid, greenish blue print is obtained. Example s The insoluble dye salt is prepared as follows: 50 g of des-azo dye 4,4'-diaminodiphenylamine-2-sulfonic acid are dissolved in 100 cc hot water. After cooling, 60 g of an aqueous solution of hydrochloric acid diphenylguanidine (containing 301% base) are allowed to flow in with stirring. The precipitate is filtered off, washed and dried. The production of the printing paste, the printing on viscose artificial silk or natural silk and the sewing are carried out as indicated in example i. A deep black print is obtained.

EXAMPLE 6 The insoluble dye salt is prepared by dissolving 40 g of dye no. 933 (Schultz, loc. Cit.) In 1000000 water, adding 85 g of an aqueous solution of diphenylguanidine (containing 3090 base) to the solution with stirring, and filtering off the precipitate , washed out and dried at ordinary temperature under reduced pressure.

The production of the printing paste, the printing on copper rayon or Viscoselcunstseide and the aftertreatment are carried out as in example i. You get a vivid, yellow print.

Example 7 of dye No. 871 (Schultz, Dye Tables, 7th Edition) are dissolved in 500 cc of hot water and 7 g of aniline hydrochloride, dissolved in 63 cc of cold water, are added. The precipitate formed is filtered off, washed out and dried under reduced pressure. 35 g of this dye salt are with 6o g tall oil vinyl ester and 5 g of clay hydrate too g on a three-roller mill finely rubbed. The printing paste obtained in this way is used to print a woolen fabric by means of offset printing. After printing, steaming is carried out in a round damper at 0.3 atmospheres for 15 minutes. It is then rinsed in a bath containing 1 to 2 g fatty alcohol sulfonate per liter at 40 ° C. until the excess fatty printing ink has been removed from the fabric, rinsed with cold water and then dried. A rich, vivid, violet print is obtained.

Example 8 i o g of the green dye from the complex chromium compound of the azo dye i-amino-2-oxy-4-nitrobenzene> 2-aminonaphthalene-5-sulfonic acid are dissolved in 500 ccm of water, 32 g of an aqueous solution of hydrochloric acid diphenylguanidine (containing 30% base) was added with stirring. The resulting precipitate is filtered off, washed and dried.

40 g of the dye salt thus obtained are mixed with 60 g of linseed oil varnish finely ground on a roller mill. With this printing paste a Printed fabric made of natural silk. Then steamed and rinsed in the kettle for% hour and dried. A rich, green print of good fastness to washing and light is obtained.

Example 9.

20 g of dye No. 871 (Schultz, Dye Tables, 7th edition) are dissolved in 50 ° cc of water and 100 g of a solution of hydrochloric acid n-butylamine which contains 10% n-butylamine are added with stirring. After filtering and washing, the precipitate is dried. 40 g of the dye salt thus obtained are the with 6o g of fine linseed oil varnish on the roller mill v errieben. ioog, A fabric made of natural silk is printed with this printing paste in offset printing, then steamed for 30 minutes, then thoroughly treated in a .40 ° C "= poor solution of ig fatty alcohol sulfonate per liter, then rinsed and dried. A rich, vivid, violet print is obtained.

Claims (1)

PATENT CLAIM: '' Method for printing textile fabrics in planographic printing, characterized in that thickened with fatty binders, scb-, ve in water r or insoluble salts of dye acids and amines or ammonium compounds prints on the fiber and then cushions.