DE1060351B - Process for printing textiles made of cellulose with Kuepen and / or sulfur dyes - Google Patents

Description

Process for printing textile goods made of cellulose with vats and / or Sulfur dyes The term two-phase printing processes are processes known for printing textile goods with vat and sulfur dyes, in which the dye together with certain coagulable thickeners, e.g. B. alkyl cellulose ethers or simple Joha.nnisbrotkernmehlverdickenungen, is printed on. The printing pastes themselves do not contain any reducing agents, but occasionally alkaline ones Agents such as potassium or sodium carbonate or sodium hydroxide, depending on the Compatibility of the thickening with these alkaline agents. After printing and drying the goods with reducing agent solutions optionally containing alkaline agents treated; which mostly still causes the coagulation of the above-mentioned thickeners or beneficial additives such as sodium tetraborate. Also these will be Reducing agent solutions occasionally with non-coagulable thickeners, like tragacanth, thickened.

The advantage of this process is the unlimited shelf life the prints before steaming. However, the decomposability is very disadvantageous noticeable of the reducing agent solutions used. To reduce one uses in the two-phase printing process, you want to achieve a very rapid reduction effect, preferably sodium dithionite in conjunction with alkaline agents. It will but the advantage of the rapid reducing effect by the disadvantage of the light one Decomposition of the reducing agent impaired.

With this state of the art, methods had to be sought which have the advantages of reduction with sodium dithionite without the disadvantages that are due to the use of this reducing agent to show.

It has now been found that textile material from native and / or regenerated Cellulose can be printed with vat and / or sulfur dyes, if you have the goods in the first stage with dyes with the addition of thickeners and in water sparingly soluble reducing agents without the addition of alkaline agents and printed after drying the prints in a second stage with an alkaline agent and if necessary Complex-forming polycarboxylic acids and / or their salts containing padding or pilling solution treated and fixed in a known manner.

As reducing agents sparingly soluble in water, there may be mentioned, for example, salts of hydroxyalkylsulfinic acids that are sparingly soluble in water, such as the dizinc salt of hydroxymethanesulfinic acid, the dizinc salt of hydroxyethanesulfinic acid or the calcium or barium salts of hydroxymethane or hydroxyethanesulfinic acid or also formamidinesulfinic acid. Suitable thickeners are coagulable and non-coagulable thickeners, e.g. B. locust bean gum, starch, crystal gum, British gum, emulsion thickeners of the type of an oil-in-water emulsion and a water-in-oil emulsion or mixtures of these thickeners. Examples of alkaline agents are the hydroxides, carbonates or bicarbonates of the alkali metals, such as sodium hydroxide, potassium carbonate or sodium bicarbonate. As complex-forming polycarboxylic acids or their salts are, for. B. ethylenediaminetetraacetic acid, nitrilotriacetic acid or their alkali salts, such as the tetrasodium salt of ethylenediaminetetraacetic acid, mentioned. When compiling the print thickenings and the pad or pad solutions, it may be necessary to consider whether the thickener used is e.g. B. is to be coagulated by alkali carbonates, Alkahhydroxyde or by sodium tetraborate. Furthermore, the printing thickenings, the printing auxiliaries usually used, for example hydrotropic agents such as glycerol or urea, and the padding or printing agents can be used. Plant solutions also not yet coagulable thickeners, e.g. B. tragacanth slime included. The prints are fixed in a manner known per se by a heat treatment in which z. B. air-free saturated or superheated steam from 1 to 3 atm at a temperature of 100 to 200- C or hot metal or oil baths, etc. can serve.

One advantage of the new process is that it causes decomposition of the reducing agent, which is sparingly soluble in 'iTasser, is not possible in the printing paste is. The new process also allows a very significant saving in reducing agents, because the reducing agent only applies to the areas of the textile that are to be printed is applied. Finally, it should be mentioned that the steaming times, if necessary by the addition according to the invention of complex-forming polycarboxylic acids and / or the salts of which can be significantly shortened, the dye yield to is at least not reduced.

The parts given in the following examples are parts by weight. Example 1 A white cotton fabric is printed with the following printing paste: 100 parts of Bz 2, Bz 2'-dimethoxy dibenzanthrone (30%) 100 parts of water 50 parts of glycerin 300 parts carob flour (6%) 200 parts wheat starch (10%) 80 parts of the dizinc salt of hydroxymethanesulfine acid 170 parts of water 1000 parts After printing and drying, the fabric is padded on a padder with the following solution: 50 parts sodium bicarbonate 70 parts of aqueous sodium hydroxide solution (38 ° Be) 20 parts of sodium tetraborate 50 parts of urea 810 parts of water 1000 parts The padded material is then continuously introduced into a steamer in a moist state and steamed for 6 minutes in air-free steam at 100 to 105 ° C. It is then rinsed, reoxidized, soaped at the boil and rinsed as usual. A bright green print is obtained on a white background.

If 20 parts of the tetrasodium salt of ethylenediaminetetraacetic acid are added to the pad solution described above and the amount of water is reduced to 790 parts, the steaming time can be shortened to 1 minute with the same color yield. Example 2 A white cellulose fabric is printed with the following printing paste: see above 50 parts of 5,5'-dichloro-7,7'-dibromoindigo (dough 20%) 25 parts of glycerin 200 parts water 65 100 parts of the dizinc salt of hydroxyethanesulfinic acid 300 parts starch ether thickening (4%) 200 parts of wheat starch (10%) 125 parts of water 100 (? Parts 70 a After printing and drying, the fabric is padded with the following solution: 70 parts of aqueous sodium hydroxide solution (38 ° Be) 30 parts sodium carbonate (anhydrous) 30 parts of tetrasodium salt of ethylenediamine tetraacetic acid 20 parts of sodium tetraborate 850 parts of water 1000 parts then placed in the moist state in a continuously operating steaming device and steamed for 1 minute with air-free steam at 100 to 105 ° C. The print is then completed as described in Example 1. A blue print is obtained on a white background.

Example 3 A white cotton or cellulose fabric is printed with the following printing paste: 150 parts 4,4'-dimethyl-S, 6,7'-trichlorothioindigo (30 "/ oig) 30 parts of glycerin 100 parts calcium salt of hydroxymethanesulfine acid 720 parts crystal rubber / British rubber con thickening (1: 2) 1000 parts After printing and drying, the following potting solution is printed onto the fabric using a hashur roller: 50 parts sodium bicarbonate 70 parts of aqueous sodium hydroxide solution (38 ° Be) 30 parts of nitrilotriacetic acid 400 parts tragacanth thickening (6%) 450 parts of water 1000 parts After paddling, the fabric is steamed in the moist state or, after intermediate drying, in a continuously operating steamer for 1 minute at 100 to 105 ° C. and then treated further as described above. A red print is obtained on a white background. Example 4 A cotton or cellulose fabric is printed with the following printing paste: 100 parts Bz 2, Bz 2'-dimethoxydibenzanthrone (30 "/ oig) 100 parts of water 200 parts of carob flour (6%) 500 parts of emulsion thickener from the implementation zungsgut from 1 mole of octodecyl alcohol with 25 moles of ethylene oxide 100 parts calcium salt of hydroxyethane sulfine acid 1000 parts The fabric is then given further treatment as in Example 1. A green print is obtained on the fabrics used. Example 5 A white cotton or cellulose fabric is printed with the following printing paste: 80 parts of the sulfur dye »ImmediaIcar- hon B for pressure «(S chultz, dye tables, 7th edition, No. 1057) and 40 parts of glycerine distributed in 240 parts of water at 60 ° C and in 600 parts British rubber thickening (1: 1, the 40 parts calcium salt of hydroxymethanesulfine contains acid 1000 parts After printing and drying, the following thickened solution is applied to the fabric with the aid of a thousand-point roller: 70 parts of aqueous sodium hydroxide solution (38 ° Be) 30 parts sodium carbonate (anhydrous) 30 parts of tetrasodium salt of ethylenediamine tetraacetic acid 300 parts tragacanth thickening (611 / o) 570 parts of water 1000 parts The padded material is then passed through a steaming device in which it is steamed in air-free steam at 100 to 105 ° C. for 1 minute. After steaming, the print is completed by rinsing, reoxidizing, soaking, rinsing and drying. A deep black print is obtained on a white background. Example 6 A white cotton or cellulose fabric is printed with the following printing paste: 40 60 parts of the sulfur dye »Immedialrein- blue «, (Schultz, color tables, 7th edition, No. 1099) 40 parts of glycerin 260 parts of water 300 parts starch ether thickening (4%) 200 parts wheat starch (10%) 40 parts of calcium salt of hydroxymethanesulfine acid 100 parts of water 1000 parts After printing and drying it is padded Fabric on a foulard with the following solution: 70 parts of aqueous sodium hydroxide solution (38 ° B6) 30 parts sodium carbonate (dry) 20 parts of sodium tetraborate 50 parts of urea 830 parts of water 1000 parts and treats it further as described in Example 5. A bright blue print is obtained on a white background.

Claims (2)

PATENT CLAIMS: 1. Process for printing textiles made of cellulose with vat and / o @ the sulfur dyes, characterized in that the good in the first stage with dyes with the addition of thickeners and in water sparingly soluble reducing agents without the addition of alkaline agents and printed after drying the prints in a second stage with an alkaline agent Treated block or plow solution and fixed in a manner known per se. 2. Process according to Claim 1, characterized in that the logging or planting solutions Complexing polycarboxylic acids and / or their salts are added.