DE703051C - Wool and cellulose fibers, the color properties of which have been altered by the effects of the weather, with dyes that contain acidic groups - Google Patents

Description

Process for dyeing wool or mixtures of wool and cellulose fibers, whose coloring properties have been changed by the effects of the weather, with dyes that contain acidic groups When dyeing waste wool and more or less worn or faded clothing with acidic dyes Often insurmountable difficulties arise from the fact that uneven colorations -be obtained. Suggestions for a more even absorption of the dyes force, it was not lacking. Based on the experience that old, standing Dye baths are better equalized than fresh baths if the liquor is animal-based or vegetable colloids such as glue, protein degradation substances, starch or sulphite cellulose waste liquor to. The realization that the better effect of such a fleet on a change due to the dye solution, ultimately led to the use of a myriad of wetting, leveling and dyeing auxiliaries, those added to the liquor, especially more satisfactory when dyeing with acid dyestuffs if the drawing-up is carried out carefully Yielded results. All auxiliaries which improve these dye liquors fail however, no matter how careful the dyeing method, when re-covering the cotton in acidic pre-dyed half wool in neutral baths.

It is also known to bleach worn woolen goods prior to dyeing or to level off the peeling with oxidizing or reducing agents. These too Pretreatment methods are unsuccessful. The damage to the wool fiber is at risk rather the quality of the goods.

The present invention breaks new ground in this area. It has been found that higher molecular weight, aliphatic, cyclic or Example 3 From two equally faded in color and -abgezogenen jacket portions is a part in a solution of o, - -g of high molecular weight amine indicated in Beispiel-- and o, 5 g of formic acid 8 5% in 1 1 of water at 30 ° C pretreated in the ratio i: 3o.

After changing clothes several times, the jacket material remains overnight, 16 hours, in the bathroom. Then it is rinsed with cold water.

iog of the fabric pretreated in this way are placed in one of the usual porcelain staining beakers Dyed with 35o cc of a dyebath of the following composition: o, 25o, 'o brilliant acid blue A (S c h u 1 t z, color tables, 7th ed., No. 827), 0.550,) Orange II (ibid., No. 189), 0.70, 'o sorbin red (ibid, No. 105), 10% sodium sulfite crystallized, 30; `o sulfuric acid 96%.

In a second porcelain mug, io g of the not pretreated fabric dyed with the same liquor. At 40'C it is received, in 1 / _L hour brought to the boil, after 1 /. Hour i% sulfuric acid was added and kept at the boiling temperature for a further 1/1 hour. The fleets pull in both cases completely, off.

The fabric that has not been pretreated leaves the more heavily fused areas recognize by increasingly darker color, while the pretreated piece a shows much lighter, purer and more uniform coloration.

Example ¢ i o g of the peeled wool fabric are in a 3o'C warm Brought bath, the liter o, i% high molecular weight amine, prepared according to patent specification 629732, Example 9, and 0.5% formic acid 8 contains 5%.

With a liquor ratio of i: 3o, people often move for i hour, then tucked under and left in the bathroom overnight.

After rinsing, it is dyed in 30o cc of a liquor with 1.35% diamine brown -M, 0.45.0, `o diamine green B (Schultz, Dyestuff Tables, 7th edition, No. 668), 150: '0 sodium sulfate crystallizes.

The dyeing time is 1 hour.

Under the same conditions and at the same time, iog are not pretreated Dyed wool of the same consistency. The piece that has not been pretreated shows : an uneven, dark color. In contrast, you get on the pretreated Pieces a lighter, livelier and more even color. The comparison colors show that a pretreatment of the wool with high molecular weight amines reduces the affinity slightly increased to acidic dyes with undamaged fibers, with damaged fibers on the other hand diminishes.

Example 5 The following are dyed together in a dyebath: 6; o g of the fabric pretreated according to Example 3 and provided with cotton seams and 350 g of the same, non-pretreated fabric with i, 350 "'o diamine brown M, 0.45% diamine green B, i5o' o Sodium sulfate crystallizes in 3 51 liquor.

You go at about 50`C with the stapled in the usual way Tissue parts, moves diligently at first and slowly brings to boiling temperature. The dyes primarily affect the pretreated tissue at first. To After one hour of dyeing, however, the fabric that has not been pretreated shows almost the same depth of color like the pretreated and a purer, more even shade than a comparison piece, that was stained without the presence of high molecular weight amines.

Claims (2)

PATENT CLAIMS: i. Process for dyeing wool or mixtures Made of wool and cellulose fibers, whose dyeing properties are due to the effects of the weather have been modified with dyes which contain acidic groups, characterized in that that the dyed material before dyeing with solutions of high molecular weight amines, ammonium, Phosphonium or sulfonium bases or their salts treated as they are for improvement the fastness properties of dyeings on textiles with dyes that acidic groups containing,, are common. 2. The method according to claim i, characterized marked that "one not pretreated, worn wool and pretreated as without, worn wool or worn blends of wool with cellulose fibers under slower Increasing the temperature together colors.