CS237820B1 - Method of refining of textile materials containing cellulose fibre - Google Patents

Description

more particularly, in the gargling process, and generally on devices where the bath ratio did not exceed 1: 3 to 1: 5.

Thus, for example, the same effect was achieved at a bath ratio of 1: 30 with a tenfold greater amount of formulation than at a bath ratio of 1: 3. However, it is known that many textiles cannot be dyed other than from relatively long baths, such as knitwear. Also, yarns that use a bath ratio of 1:10 to 1:20 are still commonly used in dyeing yarns. In these cases, of course, the use of cationic preparations has not been economically possible.

This drawback is solved by compounds of formula I which, when used from long baths, are pulled onto cellulose fibers. As before, these compounds can be used before, during and after the dyeing. In all these cases, the formulation mediates the bond between the cellulose fiber and the anionic dye.

When applied before dyeing after fiber drawing, the preparation reacts in an alkaline environment with the hydroxyl groups of cellulose and forms active centers capable of binding anionic dyes in the cellulose macromolecule. The cellulose modified with the compounds of formula 1 is thus very easily dyed with anionic dyes. In subsequent dyeing, the use of anionic dyes is significantly increased over conventional dyeing methods. The most noticeable difference is seen with reactive dyes, where, in addition, no salt or alkali need to be dosed during dyeing, as is customary in conventional processes. With the high use of dyes, there is little demand for the amount of water required for the dye washing process and the substantially reduced dye wastewater pollution. The application of the compounds of the formula (1) together with the dye is of relatively minor importance since, owing to the large molecule, these substances precipitate with a number of dyes and therefore only selected dyes can be used for single-application.

However, the application of these compounds after dyeing or after the dye has been applied to the dyed material is very important. For example, the stability of substantive wet dyes can be increased up to the reactive dye level.

The compounds of formula (1) are also characterized by their strong cellulose fiber crosslinking properties and can thus serve simultaneously for the final treatment of cellulose fiber-containing materials.

The action of these substances improves primarily the wet recovery, which is manifested by good non-iron properties of the processed materials. Thus, it is possible to merge into a single dyeing operation and a final non-iron treatment. It goes without saying that the non-iron treatment does not have to be linked to the dyeing and can be carried out on the non-dyed fabrics by the compounds of the formula 1.

Table 1

Examples of compounds of formula 1

4 ·

CH = CH OH CH- ^ H-CH ^ - CH = CH J CH ² Cl ² -CH ^{12 12} Cl ² OH 1 1 | j ~ N N-CH 2 -CH-CH 1 1-7 ² 11 CH OH Cl, O

* Γ Ί Ί CH-CH CH-CH 'CHjCH-Cf - ^ - -H 2 -CH 2 -CH-CHp- - N N-CH ₂ CH-CH ₂ L ^1/2 1 1 ² 1 ( Cl OH CH CH OH Ct in - OF

In the process, compounds with five imidazole cores are predominantly formed, i.e. compounds 1, 2 and 3 of Table 1. Substances with four or three imidazole cores are formed as a by-product.

The following examples illustrate the use of compounds of Formula 1.

Example 1

The cotton yarn in the winding on the perforated tubes is pre-treated simultaneously with the bleaching and after washing, at a bath ratio of 1: 10, processed in a bath containing:

Compound No. 1 of Table 1 3% Sodium hydroxide 1.5%

The yarn treated in this bath at a dyeing apparatus with a circulating bath so that at 50 ^C is added first cationization said compound and after 10 minutes was successively added dilute sodium hydroxide. The material is treated at the same temperature for a further 45 minutes after the addition of the caustic. This is followed by cold water washing, neutralization to pH

6.5 to 7 acetic acid and wash again. Then the yarn is dyed with reactive blue dye No. 4 4%

The start of the dyeing is at 30 ° C, the temperature is raised to 90 ° C within 30 minutes, and is stained for 15 minutes at this temperature. In doing so, the dye is completely pulled out onto the material to be dyed. An anionic detergent such as lauryl sulfate 0.5 g is added to the dye bath. I ¹

In this bath the yarn is treated at a temperature of 90 to 95 ° C, after which the dyeing is completed by washing with hot and cold water.

The resulting dyeing is characterized by high dye utilization, very good fastnesses, and the dyed yarn has a soft flowing feel, which facilitates its further processing.

Example 2

The reel tub is treated with a mixture of 80% cotton and 20% viscose staple by first conventional single-stage bleach bleaching and after washing the cation in a bath containing compound 2 of Table 1 with 4% sodium hydroxide 2%

The braid is processed at a temperature of 50 ° C, the cationic preparation is metered into the bath first, and after 20 minutes, dilute sodium hydroxide solution is gradually added. After the addition of sodium hydroxide, the fabric is treated in the bath at the same temperature for 60 minutes. Washing and neutralization is followed by staining:

Reactive green No Cl 8 3,5%

The start of the dyeing is at 30 ° C, the temperature is raised to 90 ° C over 45 minutes, at this temperature it is dyed for an additional 30 minutes, after which time lauryl sulfate 0.5 g is added to the bath. I ' ¹

In this bath, the fabric is treated for a further 15 minutes and the dyeing is completed by a short wash with gradual cooling of the bath by the addition of cold water.

The braid is characterized by high color fastnesses, even coverage of both components of the mixture, the shrinkage of the material is suppressed against cotton processing, the dye was perfectly utilized and the waste water was practically not contaminated at all.

Example 3

On a VT-rope dyeing machine, at a bath ratio of 1: 10, a 70 ° / o PES and 30% linen fabric is dyed with a combination of disperse orange No. 31 31 ° / o straight orange No. 39 0.25%

The start of the dyeing is at 40 ° C, the temperature is raised to 125 ° C over 40 minutes, at this temperature it is dyed for 35 minutes, then the dyeing bath is gradually cooled (75 ° C min ^-1 ) to 75 ° C. During the cooling phase at 110 DEG C., 5 g of anhydrous sodium sulphate was added to the bath. I ^-1

At 75 ^C, the cold water inlet dyed material is washed and cooled further. Thorough washing is followed by treatment in a bath containing:

Compound No. 3 of Table 1 1% sodium hydroxide 1%

The bath temperature is 50 ° C, the cationic product is dosed first and after 10 minutes sodium hydroxide is added. The total settling time is 45 minutes. Washing, neutralization and final treatment with an anionic detergent at 60 ° C followed by cold water washing.

Example 4

Cotton and textured polyester fiber braids dyed in a conventional manner are impregnated on a fullar bath with:

Compound No. 1 of Table 1 30 g. ^_1 1 sodium hydroxide 15 g. I ^-1

After passing through the fuser, the fabric is rolled up, the wrap is protected from film drying and left to stand for 8 hours while rotating continuously. This is followed by washing and neutralization with acetic acid on a corded scrubber and at the end of the treatment in a bath containing an anionic preparation of 0.5 g. I ^-1

The fabric thus treated exhibits a favorable feel, a reduced tendency to pilling, an electrostatic charge suppression and improved hydrophilicity.

Example 5

The polyester cotton fiber fabric (67/33%) is impregnated on the bath fulla after pre-treatment:

sodium alginate 4 g. I ^-1 dispersion blue No. 73 15 g '. I ' ¹ Reactive Blue No. 5 6 g. I ' ¹ acetic acid 0.5 g. I ¹

After passing through a fuser with a 65% wicker, the fabric is dried on a hotflue at 110 ° C and heat-treated to a thermal insulation hotflue at 200 ° C for 60 seconds. The fabric is further impregnated on a bath fullar containing:

Compound No. 2 of Table 1 40 g. ^{1 1} sodium hydroxide 20 g. I ^-1

After passing through the fuser (20 ° C, 70% rinse), the fabric is rolled and allowed to rotate for 8 to 12 hours in a film-protected wrap. Washing is followed by passing through a wide-ranging machine in which the first and second compartments contain water at 70 ° C, the third and fourth compartments contain a neutralization bath containing 1 ml. . I ^-1 acetic acid (50 °), in the fifth compartment the water is 50 ° C, in the sixth compartment there is a bath containing 1 g. I ^{1 of the} anionic detergent (50 °) and in the eighth compartment the water is at 30 ° C. The dyed fabric exhibits a soft flowing feel, very good hydrophilic properties, suppressed lintiness, reduced electrostatic charge capability and very good color fastness.

Example 6

After the usual pre-treatment and bleaching, the mercerized cotton yarn is treated on a hinged dyeing apparatus at a bath ratio of 1: 20 containing:

Compound No. 1 of Table 1 4% sodium hydroxide 2%

The cationic preparation is first added to the bath and sodium hydroxide solution is gradually added after 15 minutes. The bath temperature is 50 ° C, the total working time is 60 minutes. The yarn is then washed with water of 40 ° C and neutralized with acetic acid to a pH of 6 to 7 at the same temperature. After further washing, it is dyed in a bath containing:

At the start of the dyeing, the temperature is 40 ° C and is raised to 90 ° C within 10 minutes and is then stained for 20 minutes at this temperature. Finally, the dyeing is washed with hot and cold water.

The resulting saturated red coloration has significantly higher durability compared to conventional coloring, improved shade brilliance, and saturation corresponds to the shade that can be conventionally achieved with 6% dye, direct red # C180.

Claims (1)

OBJECT OF THE INVENTION Process for the treatment of textile fibrous materials containing cellulose fibers, characterized in that the textile materials are treated with a water bath containing a compound of the general formula: CR = ^c 2 2 ° ^H Ί VY 'R * (1> wherein Y is a group -CHO ^{CH-CHO, x} i I OH Λ or ch ₉ -ch-ch ₂ ^of v X is Cl or Br, R 1, R 2, R 3 is alkyl having a carbon number of 1 to 3 or hydrogen, n an integer of 2, 3 or 4, in an amount of 0.1 to 15% by weight of the cellulosic fibers at a bath pH of 11 to 14.