DE331234C - Process for the use of cleavage products of the protein bodies - Google Patents

Description

Process for the use of cleavage products of the protein bodies. According to the patent 330133, they are made from protein bodies by hydrolytic cleavage by means of caustic alkalis or similar substances by treatment in the heat - the resulting acids, such as protalbic and lysalbic acid or their salts, the property, when added to dye baths, with the exception of vat dyes, more uniform or even to deliver deeper colorations, the effect of the baths and approaches on the at all To improve the fiber and, especially in the case of wool, to protect the fiber.

Something similar is now also the case with the vat dyes, with which However, the use of such substances is made much cheaper because they use vat dyes to dye animal fibers without damage same enables.

The typical protalbin and Lysalbinic acid attempts by Dr. Ludwig Lichtenstein (Lehrres Färberzeitung 1913, S: 21) and Dr. Robert Haller refer to the use for printing and dyeing of cotton and, in the final analysis, resulted in (Lehrres Färberzeitung 1914, p. 28 left line 10 from the bottom) bad results, while those of Dr. Richard M öh l a u (Lehrres Färberzeitung 1903, pp. 211 and 284) reported investigations "About colloidal indigo," which is produced by adsorption of protalbic and lysalbic acid relate to solubilized indigo, here, where it concerns linked dyes, out of the question at all.

It has now been found that the addition of such cleavage products the protein body also when dyeing animal fibers, especially wool with vat dyes is of particular value because it makes it possible to use vat dyes even in weak to use alkaline, neutral or more or less weakly acidic dye baths, whereby, in addition to good dyeing results, a special protection of the fiber is achieved will.

Instead of the typical protalbic and lysalbinic acid, the price of which is the If technical use is hindered in this case, the appropriate ones are used appropriately Acids from cheaper protein bodies such as casein, rice and wheat gluten, etc. Also it is not necessary for this use to separate the acid mixtures or to separate them to be cleaned carefully, as it is already a cleaning process with calcium or magnesium hydroxide is sufficient for practical use.

The following examples are intended to illustrate the way in which the vats are to be positioned and managed. Dyeing with a weakly acidic indigo vat: 40 parts of 20 percent indigo MLB vat are distributed in a little warm water and completely vat with a little hydrosulfite. i2o parts of casein product dissolved in a little warm water are added and then diluted to such an extent that i 1 dye liquor contains ig casein product. This will be up to against Lackx, sciy @ vßherE very careful tmeisäure with verdiinzit @ @:. Ction blunted and with N a moth ratio of 1: Dyed 25 to 30 minutes 40 to 50 (at 50 to 6o ° C)..

Manufacture of casein product. The casein product is obtained through Treating 100 parts of casein on a water bath for a few hours; ash- and calculated anhydrous, with 15 parts of sodium hydrate and 500 parts of water. After this the cleavage is ended, the solution is cleaned with calcium or magnesium hydroxide and neutralized in the cold with formic acid against phenolphthalein and in a vacuum evaporated to dryness.

Claims (1)

PATENT ANSpRUGH Further development of the method for using Cleavage products of the protein bodies, such as protalbic and lysalbinic acid and the like. or their salts in purified or unpurified form according to Patent 330133 at Dyeing of animal fibers with vat dyes in weakly alkaline, neutral or more or less weakly acidic drinks.