SU1758125A1 - Solution for mercerization of cellulose textile materials - Google Patents

Abstract

The invention relates to chemical technology of textile materials, in particular, to the method of mercerization of cellulosic textile materials, and can be used in light industry. The invention allows to improve the quality of the fabric while reducing the consumption of sodium hydroxide due to the fact that the fabric is mercerized with an aqueous composition containing 135-180 g / l of sodium hydroxide and 20-30 g / l of Petrosil - 2 M based on a water-alcohol solution of alumomethylsiloxanol ta or alumomethylsiliconate sodium. 4 tab.

Description

The invention relates to the chemical technology of textile materials, in particular to the method of mercerization of cellulosic materials, and can be used in light industry.

A number of compositions for the mercerization of cellulose fabrics are known.

For example, liquid ammonia based mercerization solutions provide better results than mercerization with concentrated alkaline solutions, because the fabric quickly wets in connection with low surface tension of ammonia, the composition quickly penetrates into the depth of the fiber, which makes it possible to increase the speed of the process.

The use of liquid ammonia based compounds is prevented by the lack of special sealed equipment for

this goal, because ammonia already at a content of 0.05 in air is very irritating to the skin of the eyes and respiratory tract, and higher concentrations cause choking and pneumonia. In addition, cellulose materials mercerized with liquid ammonia are more easily photodestructed than mercerized sodium hydroxide.

For mercerization, aqueous solutions of sodium hydroxide are widely used, both without and with various additives.

For example, a composition for mercerizing cellulose textile materials containing, g / l is known:

Sodium hydroxide 130-180

Lower aliphatic

vinylpyrrolidone alcohol

in mass ratio

with lower aliphatic

"

alcohol 1: 1 - 1: 45-8

Water up to 1 l

In spite of the positive results of mercerization, this composition did not find practical application in industry, as it contains as an additive a toxic carcinogen - vinyl pyrrolidone, which is not produced by the domestic industry,

The most widely used are mercerizing solutions containing surfactant wetting agents as an additive, since they provide an increase in the rate of penetration of the solution into the fiber, however, only a small amount of wetting agents are stable in concentrated solutions of sodium hydroxide, which are used for mercerization.

The closest in technical essence and selected as a prototype is a composition for mercerization of cellulose fabrics, containing, g / l: Sodium hydroxide 200-220 Smachem sulphirol-80, 5-1.0

Water up to 1 l

Sulfiro-8 is the sodium salt of 2-ethyl hexanol sulfate, of the following formula:

CH3 (CH2) s-CH-CH2-0803Sh

SNSN3

This composition is mainly used for mercerizing cotton fabrics. After treatment, the fabric has a satisfactory gloss, its physicomechanical parameters correspond to the existing requirements. However, during the mercerization, considerable foaming is observed, which leads to non-uniform mercerization and negatively affects the quality of dyeing. The composition causes significant technological shrinkage of the material, which for weave fabrics is about 10-12% in weft, and 15-20% for cotton-siblon fabrics. This leads to the need for significant subsequent tissue spreading, which in turn leads to an increase in shrinkage after washing the finished product. The weft shrinkage after washing the cotton-fibrous fabric with the treated composition is 5-7%, and while, in accordance with the requirements of GOST, it should not exceed 2%. The strength of the cotton-sibling fabric after mercerization due to the weakening of the symblon fiber decreases by a factor of 3-5. Significant disadvantages

0

50

five

0

five

0 5 0 5

This is a significant tissue stiffness that is not eliminated by further processing.

The aim of the invention is to improve the fabric quality and reduce the consumption of sodium hydroxide. The goal is achieved by introducing into the mercerizing solution based on sodium hydroxide as an additive organosilicon substance, which is a water-alcohol solution of alumomethylsiloxane sodium and alumomethylsiliconate sodium - Petrosil 2M, with the following ratio of components, g / l: 135 hydroxide -180

Aqueous-alcoholic solution of alumomethylsiloxane sodium and sodium alumomethylsiliconate (Petrosil-2M) 20-30 Water Up to 1 l

Petrosil-2M is a water-alcohol solution of alumomethylsiloxane and sodium alumomethylsiliconate (TU 6-02-1296-84).

Petrosil contains, wt%: Sodium hydroxide 12-16

Aluminum 0.5-1.5

Flints 4-8

The preparation is intended for the chemical treatment of drilling fluids for the purpose of improving their structural and mechanical properties during the drilling of oil and gas wells.

The claimed composition provides high quality mercerization due to the simultaneous presence of sodium hydroxide and Petrosil-2M.

Example 1. In the examples, mercerization solutions were prepared as follows. Sodium hydroxide in an amount corresponding to the recipe (Table 1) is dissolved in water, then Petrosil-2M is added in concentrations according to Table 1. After stirring, the volume of the solution is made up to 1 l with water.

In order to maintain the same mercerization conditions in order to eliminate the influence of side factors on the quality of the mercerization, the fabric is punctured under the same tension on the needle frame and impregnated in this state with the mercerization solution at 20 ° C for 60 seconds. Then the fabric is washed with hot and cold water, then removed from the framework, neutralized with a solution of sulfuric acid at a concentration of 5 g / l, washed with cold water, wrung out in laboratory plus and dried at 80 ° C.

Table 2 presents the data for cotton fabric art.36.

EXAMPLE 2 The mercerization compositions according to Table 1 are prepared as in Example 1 and used to mercerize cotton cotton fabric art.535.

The results of the experiment are presented in table.3.

Tables 2–3 also show the results obtained by merging the compositions in accordance with the prototype (recipes 12 and 13).

In recipes 12 and 13, a solution of sulfirol-8 is added to the sodium hydroxide solution, after which the total volume is adjusted to 1 liter.

Examples of the production conditions on the mercerizing machine f.The actual was carried out by mercerizing x / b fabric at 41. The composition of the mercerization solution, g / l:

Sodium hydroxide 170-180

Petrosil-2M25

Water Rest left 1 L

Example 4. Under the conditions of example 3, mercerization of cotton fabrics Art. 41 was carried out with the composition (g / l) in accordance with the prototype:

Sodium hydroxide 210-220

Sulfirol 82

Water Rest left 1 L

The results are shown in table 4.

From the data presented in Tables 2–4, it follows that the proposed composition provides good quality mercerization while reducing the consumption of sodium hydroxide. Its concentration in the solution decreases on average in comparison with the prototype to 30%.

The barite number determined on the fabric mercerized with the composition according to the examples of Table 2. 1-4 corresponds to the norm. The shrinkage after washing in comparison with the prototype is reduced during the experiment in laboratory conditions from 3.0 to 1.0% on the base and from 2.0 to 0.7% on the weft. For production batches from 5-6 to 3.3-4.5% on a basis and from 2.0-2.7 to 0.4-0.6% for a duck.

The inventive method provides an improvement in the appearance of the fabric, the fabric is not rigid, of good fullness and a nice neck.

An important advantage of the claimed composition is that it can be used for both cotton and cotton viscose, in particular, cotton and cotton fabrics. To use the proposed solution does not require special equipment.

Claims (1)

Claims of the invention Composition for mercerization of cellulosic textile materials containing sodium hydroxide and water, characterized in that. In order to improve the quality of the fabric while reducing the consumption of sodium hydroxide, the composition additionally contains the preparation Petrosil-2M based on a water-alcohol solution of aluminomethylsiloxanol and alumina sodium silicate with the following content of components, g / l; Sodium hydroxide 135-180 Petrosil-2M on the basis of a water-alcohol solution of alumomethylsnloxanol and sodium alumomethylsiliconate 20-30 Water Rest left 1 L Table 1 Cotton fabric test results art. 36 The results of the test fabric art, 535 from a mixture of cotton fiber fibers with -j ate sa N3 cl Table