DE2922373A1 - Discharge printing synthetic-fibre textiles - with printing paste contg. solubilising agent for dispersion dyes - Google Patents

Abstract

White or colour discharge printing of synthetic fibre (esp. polyester) textiles dyed or impregnated with dispersion dyes is carried out by (a) applying a printing paste contg. H2O, thickeners, other additives and a cpd. (I) which solubilises the dispersion dyes at elevated temps. without attacking the synthetic fibres under thermosol conditions, and (b) heat treating the printed textile. The process gives a readily controllable uniform whitening effect (or colour change) and is applicable to a wide range of dispersion dyes.

Description

Procedure and aids for local lightening, "whitening

etching "or" colored etching "of textiles made of synthetic fibers, the dyed with disperse dyes or impregnated but not yet fixed Disperse dyes, such as azo, anthraquinone, quinophthalone or Benzthioxanthene dyes are well known and can be found in COLOR INDEX, 3rd edition (1971), Volume 2 under the class name "Disperse Dyes". you will be mainly used for dyeing or printing polyester fibers, but can also on other synthetic fiber materials, such as those made of synthetic polyamide, Polyacrylonitrile or cellulose triacetate can be used.

In addition to the direct printing of polyester fibers with disperse dyes various printing techniques are known, through which white and colored effects Colorations can be achieved, such as 1) white and colored etching, where the polyester fiber material is available as a finished dyeing with disperse dyes, 2) Etching reserves as white and colored etching, with disperse dyes on the polyester material beforehand have been applied but have not yet been fixed, 3) reserve procedure, the polyester material being preprinted with white or colored reserves prior to dyeing will.

All these processes are based on the disperse dyes be destroyed locally at the areas printed with the etching pastes. this happens in the heat treatment after printing, which in most cases a steaming process, but in some cases also a hot air treatment. With etching reserves and back-up procedures are carried out during this heat treatment at the same time the dye fixation on the areas not printed with Xtz pastes. In the case of colored etching, etch-resistant dyes are created at the same time as the etching paste printed, which color the fiber in place of the destroyed disperse dyes. In addition to etch-resistant disperse dyes, other dyes can also be used as such Classes, such as vat dyes, are used.

As dye-destroying products are used in the etching pastes Reducing agents, such as stabilized hydrosulfite compounds or Tin salts, alkalis such as caustic soda. Also, in many cases Etch-enhancing products, such as carriers or anthraquinone, are also used in the etching pastes.

A disadvantage of all known methods is that uniform lightening effects can not be achieved and that whitening effects after the individual process only are possible with only a few disperse dyes.

It has now been found that local lightening, white and colored effects can be obtained on textiles made of synthetic fibers, which are finished with disperse dyes colored or only impregnated, i.e. not yet fixed, can be achieved by one (1) applies a printing paste to the textile materials mentioned, in addition to Thickeners, other common printing auxiliaries and water auxiliaries contains, which for the disperse dyes at elevated temperature dissolving properties and which the synthetic fibers of the textile material under thermosol conditions, i.e. at the temperature of the dry heat development (180 - 220 "C), do not attack and (2) a heat treatment is followed after the printing paste has been applied.

As a characteristic aid for the implementation of the invention Process can use compounds of an anionic, cationic or nonionic type come into use. For example, fatty acid cosides can be used, Fatty acid-protein condensation products, sulfated oils, salts of alkyl sulfamidocarboxylic acids, Alkyl sulfates, alkyl sulfonates, alkylphenol polyglycol ether sulfonates, phosphoric acid esters, Glycols, polyglycols, alkoxylated fatty amines, fatty alcohols or fatty acids or Alkylaryl polyglycol ethers, such as alkylphenyl polyglycol ethers, the added alkylene oxides represent predominantly ethylene oxide or mixed oxyalkylates of the compounds mentioned, such as those made from ethylene oxide and propylene oxide.

The suitability of the individual aids for the method according to the invention can be determined in preliminary tests using the following test method: the exhaust process under HT conditions 0.5% dyeings with the dyes (Commercial form) C.I. No. 47 023 (Disperse Yellow 64) and C.I. No. 11 077 (Disperse Blue 165) on polyester fiber fabric using a known procedure. the finished dyeings are then printed with printing pastes, in addition to the usual Shares of water, thickeners and, if necessary, other additives, such as Contain water softeners, 20 and 200 g / kg of the auxiliary to be tested. After printing, the dyeings are thermosolated for 2 minutes at 210 to 2150C, then rinsed and reductively cleaned.

The results obtained can then be used to determine whether the relevant tool for lightening effects alone or both for lightening effects as well as for whitening effects. While for lightening effects a variety of products of different constitution are eligible for white effects mainly oxalkylated compounds, preferably oxethylated Fatty alcohols, fatty acids or alkylphenols and especially those with 5 to 40 moles of ethylene oxide per mole of basic substance are suitable. Fatty alcohols are particularly suitable with 8 to 18 carbon atoms, which is oxethylated with 5 to 40 mol of ethylene oxide are.

While for lightening effects a variety of products of the most varied Constitution comes into question, are mainly alkoxylated for white effects Compounds, preferably oxethylated fatty alcohols, fatty acids or alkylphenols and especially those with 5 to 40 moles of ethylene oxide per mole of basic substance suitable.

The advantages of the new process are that it is very uniform Lightening effects can be achieved, with the desired degree of lightening, in Dependent on the available color depth, due to the type and amount of IT auxiliary as well as the type and duration of the heat treatment that also follows the printing can be influenced and that continues with a significantly larger number of Disperse dyes white effects are achievable.

The application quantities of the auxiliaries in the printing pastes as well as the The way in which the new procedure is carried out depends on the effects achieved should be.

Depending on whether light or strong lightening effects or white effects The aim is to use quantities between 5 and 200 g of auxiliaries per kg of printing paste into consideration.

The type of heat treatment also plays an important role. When the printing process is followed by a steaming process, mainly Lightening effects, but hardly any whitening effects achieved. (For example, it can be steamed 20 - 30 minutes under pressure at 1.5 - 2 atmospheres (in the Rule in the star damper), 8 minutes in superheated steam at 170 - 1800C (e.g. in a hanging loop steamer), 10 minutes in saturated steam at 1020C (star damper).) On the other hand, white effects are achieved when the printing process is followed by a dry heat treatment like her for the fixation of disperse dyes on polyester fibers according to the so-called Thermosol process is common (for example, a two-minute dry heating at 2100C). The dry heat treatment can, for example, by means of hot air, heat rays and / or contact heat (conducting over heated metal cylinders).

It is also important for the achievable effects in which The type of textile material with the dyes is present. If it is a polyester fiber material, on which the disperse dyes are not yet fixed, then lightening effects, less often white effects, are obtained. Good white effects are achieved by the new process, however, when finished dyeings with disperse dyes are present on polyester fiber materials. It doesn't matter which one Method the stains were made, i.e. whether HT stains, carrier stains, Thermosol dyeings or dyeings from organic solvents are present.

It is a key advantage of the new procedure that straight in the presence of finished dyeings, a significantly larger number of dyes white can be "etched" than according to the previously known methods. Also can to achieve white effects can be identified as a further advantage that after the method according to the invention is not a lengthy steaming process, but only one brief dry heat treatment is required. This also has the advantage that the printed goods during the seat treatment, for example in a tenter frame can be guided without contact, which is not possible in a damper.

Another advantage of the new process is that the costs a short dry heat treatment are significantly lower than those of the previously usual procedure. In addition, the new process can be proportionate simple mechanical equipment (e.g. magnetic squeegee in round stencils) in dyeing works are operated in which the machines required for dry heat treatments practically always present, while those for fixation according to the usual Printing processes did not use dampers in dye works to that extent for a long time as are available in print shops.

The method according to the invention can also be used as a function of Achieve further interesting effects based on the type and amount of aids. Only small amounts of auxiliaries of, for example, 5-50g per kg of printing paste are used used, the dye migrates from the printed side of the Textile material to the back. According to the new process, not only white and lightening effects, but also color-enhancing effects can be achieved, for example when the wrong side of the fabric is printed on the surface.

In the case of "WeiBätze", for which, as already described above, the treatment of finished polyester fiber dyeings and subsequent dry heat treatment The most suitable method is to use small amounts of the printing pastes known etching agents or etching aids can be added. This can be achieved that the high amounts of product required for whitening effects are somewhat lower can be maintained, with a combined dry heat / steam treatment in such cases is appropriate.

In the case of "colored etching" it is surprising that disperse dyes used both as "etchable" dyes and as "etch-resistant" dyes can be.

For example, it is easily possible to use a to the Etchable disperse dye A produced dyeing with the etch-resistant disperse dye B colored to be etched ". It is of course in the nature of the invention that as a base color should not be too dark in color and that the "colored etching pastes" disperse dyes used a reduced color yield is obtained.

In the case of "colored etching" with other classes of dye, such as with Vat dyes or their leuco esters, in practice, only apply to the extent that restrictions that dyes are selected which are fixed by a dry heat process or that a combined dry heat / steam treatment takes place.

The method according to the invention can be based on textiles, for example Polyamide fibers, polyacrylonitrile fibers or cellulose triacetate fibers, in particular but those made of polyester fibers such as polyethylene terephthalate fibers are used will.

Example 1 A fabric made of textured polyester fibers, which with 2 % of the orange disperse dye C.I. No. 26 077 (Disperse Orange 29) colored is printed with a printing paste that contains the following components per kg: 100 g of oxethylated castor oil (36 mol of ethylene oxide), 35 g of a sodium alginate, 12 g of a starch ether, 6 g of a polyphosphate-based water softener, 1 g citric acid and the remainder water.

After printing, the goods are placed in an HT steamer for 8 minutes Steamed at 1800C and then washed.

A print is obtained in which the printed areas are clearly visible are lightened.

The compositions of the printing pastes for the following examples correspond to that of Example 1, depending on the one used there Auxiliaries, minor changes in the amounts of thickeners and water must be made in order to obtain printable pastes.

Example 2 A fabric made of textured polyester fibers is made with 1% of the red disperse dye of the formula dyed after the exhaust process under HT conditions for 60 minutes at 130 ° C. and then reductively cleaned as usual. The finished, dried dye is then printed with a printing paste containing 150 g of oxethylated stearyl alcohol (25 moles of ethylene oxide per mole of alcohol) per kg. After printing, the fabric is thermosolated for 2 minutes at 2150C and then washed. A print is obtained in which the printed areas are white.

The following examples 3 to 11 correspond to the type of implementation of Example 2. Results similar to those obtained there are obtained in all cases, where the following dyes are used for dyeing (the percentages relate to based on the weight of the polyester fiber material to be dyed): example 3 1% of the red disperse dye C.I.Nr. 60 756 (Disperse Red 60).

Example 4 2% of the red disperse dye C.I.No. 11 116 (Disperse Red 73).

Example 5 2% of the blue disperse dye C.I.No. 63 285 (Disperse Blue 56).

Example 6 1% of the blue disperse dye C.I.No. 63 265 (Disperse Blue 73).

Example 7 1% of the yellow disperse dye C.I. No. 47 023 (Disperse Yellow 64).

Example 8 1% of the yellow disperse dye of the formula Example 9 3% of the blue disperse dye of the formula Example 10 1% of the violet disperse dye of the formula Example 11 2% of the green disperse dye CINr. 56 060 (Disperse Green 1) Example 12 20 g of the yellow disperse dye of the formula are dispersed in 1 liter of water. This padding liquor is used to pad a fabric made of textured polyester fibers on a padder with a liquor pickup of 60%. After padding, the fabric is dried at 1100C and then thermosolated for 1 minute at 2200C. The coloring is then completed by rinsing and reductive cleaning. The further treatment takes place as described in Example 2. A print is obtained in which the printed areas are white.

Example 13 10 g of the blue disperse dye C.I.No. 11 077 (Disperse Blue 165) are dispersed in 1 liter of water.

This Klotzflotte is a fabric made of textured polyester fibers padded on a foulard with a liquor pick-up of 60%. After the padding the fabric is dried at about 1000C. The tissue is then covered with a Printed printing paste containing 200 g of oxethylated coconut fatty alcohol (25 mol of ethylene oxide per mole of alcohol). The printed goods are then thermosolated for 2 minutes at 2150C; at the same time, the dye is fixed in the unprinted areas.

The printed goods are finished by rinsing and reductive cleaning. A print is obtained.

in which the printed areas are white.

Example 14 A fabric made from textured polyester fibers that is made with 1% of the violet disperse dye C.I.Nr. 62 025 (Disperse Violet 26) colored is, is printed with a printing paste containing 150 g of oxethylated stearyl alcohol per kg (25 moles of ethylene oxide per mole of alcohol) and 40 g of decrolin. After printing the fabric is first steamed for 5 minutes in an HT steamer at 1800C and then Thermosolated for 2 minutes at 2100C. After the usual completion you get one Print that is white in the printed areas.

Example 15 A fabric made from textured polyester fibers that is made with 2% of the red disperse dye from Example 2 is colored, is on the left Fabric side printed with a printing paste containing 20 g of a secondary alkyl sulfonate per kg contains. The printed fabric is then thermosolated at 220 ° C. for 2 minutes and washed. A pressure is obtained at which the printed Places are lightened, while the back of the printed areas, i.e. the right side of the fabric, showing a deepening of color.

Similar results are obtained according to Examples 16-14 below 20 obtained when the dyes or auxiliaries mentioned therein are used and the rest of the procedure is as described in the present example.

Example 16 2% of the orange disperse dye described in Example 1 and 20 g / kg of the sodium salt of an alkylsulfamidecarboxylic acid.

Example 17 2% of the orange disperse dye described in Example 1 and 25 g / kg of a sodium alkyl polyglycol ether sulfate.

Example 18 1% of the blue disperse dye described in Example 13 and 50 g / kg of a condensation product of partially degraded casein with oleic acid chloride.

Example 19 1% of the blue dispersion dye described in Example 13 and 40 g / kg of an alkylphenol polyglycol ether sulfonate.

Example 20 1% of the blue disperse dye described in Example 13 and 20 g / kg of a polyglycol with an average molecular weight of 1000.

Example 21 A fabric made of textured polyester fibers, which is marked with 2 % of the orange emulsion paint described in Example 2 fabric is colored, is printed with a printing paste containing per kg 120 g of one with 10 mol Contains ethylene oxide oxyethylated coconut fatty amine. After printing, the fabric becomes Thermosolated for 2 minutes at 2100C and then rewashed. You get one Print that is clearly lightened in the printed areas.

Similar results are obtained according to Examples 22 bis below 25 achieved if instead of the dye given in the present example and auxiliary uses the products listed in the following examples and one works otherwise as described in the present example, with the percentages relate to the weight of the polyester fiber material to be dyed.

Example 22 2% of the orange disperse dye described in Example 1 and 100 g / kg of an oxethylated nonylphenol (with 6 moles of ethylene oxide).

Example 23 2% of the red disperse dye described in Example 2 and 100 g / kg of an oleylamine oxyethylated with 20 mol of ethylene oxide.

Example 24 2% of the red disperse dye described in Example 2 and 80 g / kg of an oleic acid polyglycol ester (6 moles of ethylene oxide per mole of acid).

Example 25 2% of the red disperse dye described in Example 2 and 150 g / kg of a polymerization product of propylene oxide and Ethylene oxide.

Example 26 A fabric made from textured polyester fibers containing 2% of the red disperse dye of the formula is colored, is printed with a printing paste containing 100 g of oxethylated stearyl alcohol per kg (20 moles of ethylene oxide per mole of alcohol). After printing, the goods are first dried at around 100 ° C. and then steamed in an HT steamer for 7 minutes at 1800 ° C. After a customary rewash, a print is obtained which is clearly lightened in the printed areas.

Example 27 A result similar to that of Example 26 is obtained if, instead of the dye and auxiliary mentioned there, the following products are used: 2% of the blue disperse dye of the formula 150 g / kg of oxyethylated castor oil (30 mol of ethylene oxide).

Example 28 On textured polyester fabric is first according to Exhaust process under HT conditions a coloration with 0.1% of that described in example 3 yellow disperse dye. This coloring is done with a printing paste printed, the per k 200 g oxäthy- v lated stearyl alcohol (25 Mole of ethylene oxide per mole of alcohol) and 10 g of the blue disperse dye from Example 13 contains. After printing, the fabric is thermosolated for 2 minutes at 2150C, rinsed and reductively cleaned. A blue print is obtained on a yellow background.

Example 29 Conversely, a yellow print is obtained on a blue background, if the dyes listed in Example 28 are interchanged.

If you work as described in Examples 28 and 29, so obtained when using the dyes indicated in Examples 30 to 32 below the results mentioned there.

Example 30 Blue print on a red background.

Coloring: Made with 0.5% of the red described in Example 2 Disperse dye.

Printing paste: Made with 20 g / kg of the blue vat dye Vat Blue 67.

Example 31 Yellow print on a red background.

Coloring: Made with 0.5% of the red described in Example 2 Disperse dye.

Printing paste: made with 25 g / kg of the yellow vat dye C.I. No. 59 100 (Vat Yellow 4).

Example 32 Yellow print on a blue background.

Coloration: Made with 0.2% of that described in Example 13 blue Dispersion dye.

Printing paste: made with 20 g / kg of the yellow vat dye C.I. No. 59 105 (Vat Orange 1).

Claims (13)

Claims: 1. Method for local whitening, white etching or "Colored etching" of textiles made of synthetic fibers, which with disperse dyes colored or just impregnated, characterized in that (1) applies a printing paste to the textile materials mentioned, which in addition to thickeners, Contains other usual printing auxiliaries and water auxiliaries which are used for the disperse dyes have dissolving properties at elevated temperatures and which the synthetic fibers of the textile material under thermosol conditions do not attack, and (2) a heat treatment after applying the printing paste connects. 2. The method according to claim 1, characterized in that printing pastes applies, which as an auxiliary an anionic, cationic or nonionic Connection included. 3. The method according to claim 1 and 2, characterized in that one Applies printing pastes, which are used as auxiliaries, fatty acid sarcosides, fatty acid-protein condensation products, sulfated oils, salts of alkyl sulfamidocarboxylic acids, alkyl sulfates, alkyl sulfonates, Alkylphenol polyglycol ether sulfonates, phosphoric acid esters, glycols, polyglycols, alkoxylated Contain fatty amines, fatty alcohols or fatty acids or alkylaryl polyglycol ethers. 4. Process according to Claims 1 to 3, characterized in that the heat treatment in the form following the application of the printing paste of vapors takes place. 5. Process according to Claims 1 to 3, characterized in that the heat treatment in the form following the application of the printing paste a dry heat treatment at temperatures between 180 and 2200C takes place. 6. The method according to claim 5, characterized in that the dry heat treatment takes place by means of hot air, radiant heaters and / or contact heat. 7. Process according to Claims 1 to 3, characterized in that the heat treatment in the form following the application of the printing paste a combined dry heat / steam treatment takes place. 8. Process according to Claims 1 to 7, characterized in that known etching agents or etching aids are also added to the printing pastes. 9. Process according to Claims 1 to 8, characterized in that the printing pastes to achieve "colored etching" are etch-resistant disperse dyes clogs. 10. The method according to claims 1 to 9, characterized in that one of the printing pastes to achieve "colored etching" vat dyes or their leuco esters clogs. 11. The method according to claims 1 to 10, characterized in that according to the process, textiles made from synthetic fibers are those made from polyester fibers treated. 12. The method according to claims 1 to 11, characterized in that the printing pastes as auxiliaries are oxyethylated fatty acids, fatty alcohols or alkylphenols clogs. 13. The method according to claim 12, characterized in that the Printing pastes as auxiliaries saturated fatty alcohols with 8 to 18 carbon atoms, which are oxethylated with 5 to 40 moles of ethylene oxide per mole, added.