DE2519110A1 - WATER BASED TEXTILE PRINTING INKS - Google Patents

Description

Dr. Max Schneider Cr. Alfred Eite! Tue ₀ Wn ₃ . Ernst Czowalla KftEfc. umwÄit © Peter Matschkur

85 Nuremberg 106, April 28, 1975 Königstrasse 1 (Museum Bridge) Telephone collective no. 203931

Parking garage Katharlnenhof Parking garage AälersiraBe

this no. 26 823 / cz ~ sc

PROTAN & FAGERTUN Α / β, Fördertun, Vestre Nöste; 3000 drams

Norway

"Water-based textile printing inks"

The present invention relates to water-based textile printing inks, the Mg alginate as a thickener for printing * with emulsion inks on acetate and polyester fibers, in addition to the use of the combination of reactive and emulsion inks when printing on fiber combinations consisting of rayon or cotton in combination with acetate or polyester.

Synthetic fibers have gradually found diverse uses and their importance is constantly increasing. A characteristic of the synthetic fibers mentioned is that they are hydrophobic Show surface “This makes it difficult for the dye to bind to the fiber surface, and this leads to the development of a led to a new group of dyes, the so-called emulsion paints.

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The emulsion paints basically consist of a common one Dye, which has the characteristic property that it is poorly or not at all soluble in water. Using of the dyes mentioned, these are in a very small grain size pre-ground. When the dye is fixed to the hydrophobic fiber, the textile material is exposed to heat exposed; The fiber surface will sinter and partially melt and it is believed that fixation occurs by encapsulating the dye in the resulting melt.

The heat treatment of the textile material can take place in different ways. It used to be common to use steam under pressure. Little by little, the use of hot air has also begun, and today the use of superheated steam, the one tea
preferred.

which has a temperature of 175 to 180 ⁰ C and normal pressure,

The textile materials can by means of conventional known printing processes, such as machine printing and film printing of the flat printing type, rotary printing or conventional table printing.

Thickening agents that have been used up to now when printing Emulsion paints were used, the following are mentioned: carob bean pulp, guar, starch ether, crystal gum, silica containing thickeners and tragacanth. Several of the aforementioned thickeners are difficult to obtain and very difficult to obtain expensive. In addition, the use of these thickeners has many technical disadvantages. The movie that these thickeners on the surface are brittle, among other things. This can lead to the breaking of the textile material. That Thickener can also peel off, the color disappearing in places and the textile material peeling off at the same time Dye is contaminated.

When printing with emulsion inks, alginate has also been used in the form of its sodium salt. Alginate gives a smooth and elastic film, and this is probably the reason why alginate is used, although the usual Na alginate has many deficiencies. When using sodium alginate, the

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Color yield bad. To improve the color yield the Na alginate must be used together with one of the above-mentioned thickeners, preferably starch ether.

The printing sharpness is with the highly viscous alginate grades bad, and you have to have particularly low-viscosity alginate grades using a stock solution of 10%. This of course also causes an alginate paste becomes costly.

Many of the printing processes mentioned so far require a fixing aid, a so-called Carrier ("carrier") for security to fix the disperse dyes. The Fixierhilf smitte.l can have different compositions, but it is characteristic of all of them that they constitute a major source of pollution. Namely, the fixing aids occur in the wash water. The fixing aids also mean one significant increase in the cost of the printing process.

When using Mg alginate, it has now surprisingly been found that this type of alginate can be used solely for disperse dyes. The following may be mentioned as examples of disperse dyes used: "Palanil", BASF, Germany; "Celliton ¹¹ , BASF, Germany;" Perliton ", BASF, Germany;" Foron ", Sandoz AG, Switzerland;" Samaron ", Hoechst AG, Germany;" Relison ", Bayer AG, Germany;" TeraGxl ", Ciba-Geigy , Switzerland; "Dispersol", ICI, England; "Latyl", DuPont, USA With Mg-Alginate one obtains a smooth film, better printing sharpness and better levelness than previously achieved with known thickeners and combinations thereof Surprisingly, it has been shown that the addition of fixing aids can be completely eliminated if Mg alginate is used as a thickening agent of sequestering agents can be dispensed with.

All of these advantages are also achieved by being able to use a more highly viscous alginate than before. One achieves in

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practical case satisfactory results with a product that has such a viscosity that it is in a 6% ^ igen Stock solution can be used. It makes sense that the savings that one would take versus using one in one 10% stock solution used alginate is significant. The invention is not limited to this alginate viscosity, because one can of course also use a Use Mg alginate with different viscosity values.

According to the invention, the use of Mg alginate also has a Another problem that occurs in connection with the printing of so-called fiber combinations is elegantly solved. Fiber combinations, such as cotton / polyester are used more and more. If this combination is to be printed, you have to use a dye mixture. When printing such fiber combinations For example, the cotton content was printed in a conventional manner, e.g. with a reactive dye, during the Polyester portion was printed with a disperse dye. However, the presence of a starch product is very unfavorable for the reactive dye component, because this starch product too reacts with the dye. The washout of the starch is therefore hindered, and the result is a textile material which hard to touch. On the other hand, if starch is not used, the color yield from the polyester component will be poor. Using Mg alginate has solved this problem in that the Mg alginate can be used alone. The Mg alginate will face each other the reactive dyes behave like a common alginate. At the same time, the advantage of a complete color yield is also achieved, Equality and pressure sharpness achieved on the polyester portion.

The following example shows how the Mg alginate was basically used in the practical case.

To demonstrate the technical progress achieved with the printing ink according to the invention, magnesium alginate was combined with conventional Thickeners for printing are compared with emulsion inks, the magnesium alginate being based on sodium alginate and locust bean gum based thickeners.

The advantages achieved when using an Mg alginate are

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NACHQEREIOHT

in high temperature fixation of the dyes often significantly, and in the present experiment, two methods often used very be used, ie, high-temperature steam for 6 minutes at 175 ⁰ C and hot air for one minute at 20O ⁰ C.

The printing pastes were prepared according to the following recipe:

"Samaron Violet 4RS fl." 5 5 5

"Samaron Blue GS fl." 5 5 5

Water 380 380 380 380 380 380

Mg alginate 40: 1000 6.00 600

Na alginate / starch ether 70/30

100: 1000 600 600

Carob gum derivative

100: 1000 600 600

Sodium Chlorate 1: 2 15 15 15 15 15 15

1000

The pastes were adjusted to pH = 5.0 with citric acid. The Parbpaste mats have a viscosity of about 300OcP. The printing tests were carried out with table printing.

When comparing the print samples, a better color intensity was found of the pattern where Mg-Alginate was used. In one experiment, only 24 g / kg of color paste made from Mg alginate was obtained is used, while the conventional Verdiokungen at least 60 g / kg had to use in order to achieve the desired consistency of the printing paste. The Mg alginate is therefore essential cheaper with this use.

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Claims (2)

Claims 1. Water-based textile printing ink for water-repellent Textile materials containing fibers, based on dispersion printing inks / optionally in the presence of reactive dyes, and on an alginate-based thickener, possibly in the presence of conventional auxiliaries, characterized in that that the printing ink contains Mg alginate as the only thickening agent without the presence of sequestering agents. 2. Textile printing ink according to claim 1, characterized in that it contains 3-4% Mg alginate and has a pH in the range 5 to 6. 509846/1078