DE684585C - Process for finishing wool - Google Patents

Description

Ή1481 ag

It has been found that the ability of wool to felt can be improved by treating it with Sulfuryl chloride or its components sulfur dioxide and chlorine are reduced

■ 5 den can. Here, the sulfuryl chloride can be in the form of its vapor or dissolved or dispersed in a liquid which, under the given conditions of use, is essentially against the sulfuryl chloride and the

ίο wool is indifferent, preferably in one volatile organic solvents.

The conditions under which the wool is to be treated with sulfuryl chloride can be largely different. So treatment can be at ordinary or elevated Temperature take place; Furthermore, the wool can be moist to dry, and the duration of the treatment can be short or long.

In general, it was found that an increase in the initial moisture of the goods, an increase in the treatment temperature, an increase in the concentration or the Amount of sulfuryl chloride to be applied to the material and an extension the duration of treatment favor the effect of sulfuryl chloride.

However, when operating with highly concentrated Sulfurylchloridlösungen, for example, with a 7 _^1/2 ° / ₀ solution of sulfuryl chloride, so there are the Epitheln scales of the wool fiber removed, and consequently ■ is working with such concentrated solutions are not practical.

Suitable solvents for the sulfuryl chloride for example mineral oil fractions boiling between 150 to 260 ^0, carbon tetrachloride, ether and trichlorethylene into consideration.

It is known that wool can be felt by treating it with chlorine in Reduce the form of gas or solutions. This action of the free chlorine on the However, wool harbors the risk of significantly reducing the durability of the wool and to increase the alkali solubility of the wool. However, these disadvantages occur the wool treatment with sulfuryl chloride does not occur. _ _

example 1

9 kg ordinary air dry washed woolen knitted fabric are immersed for 1 hour at r8 ° C in a solution of 0.91 sulfuryl chloride in 45 1 of between 150 to 260 ^0-boiling petroleum fraction. The goods will

then removed and squeezed to a liquid content of τ, 6 1. The dehumidified goods are washed with cold water, neutralized with a dilute, aqueous ammonia solution, washed again with water and dried.

Example 2 -

9 kg of loose raw wool are stored at 18 ° C For one hour in 45 liters of a petroleum fraction as in Example ι with 0.91 sulfuryl chloride immersed. The wool is then dehumidified, washed with water, diluted with a; aqueous solution of sodium carbonate «5 neutralized, washed again and dried. Yarn and goods made from it Wool ^ produced are essentially shrink-free.

Example

Strands of woolen yarn are in a chamber suspended from which the air is then removed by means of a vacuum pump. Thereon sulfuryl chloride vapor is introduced, and this is allowed to act on the material until a sample taken is in the essentially proves to be non-matting. The wool is then taken out after one expediently the rest of suIf urylchlorlddampf by an air stream from the chamber has displaced. The wool is washed, neutralized, washed again and dried.

Example 4

9 kg of woolen yarn in the form of Kötzern with paper spindles are immersed in 45 liters of a petroleum fraction as in Example 1 with 0.9 liters of sulfuryl chloride at 18 ° C. for ¹ _{hour for 4 hours.} The liquid can also be circulated between the pots in a suitable machine. The kötzer are then dehumidified and dried in a stream of warm air.

The inventive treatment of the woolen material can advantageously be combined with carbonization by using raw wool with adhering impurities such. B. immersed in a solution of sulfuryl chloride in a petroleum fraction as in Example 1 to make it non-felting, then dehumidified and then placed in a chamber at 85 to 90 ^° C. _{for about V 2 hours.} The attached impurities are destroyed and can be removed using the same tools that are usually used when carbonizing wool.

Wool treated according to the invention also has a somewhat increased affinity to acidic dyes.

Example 5

Woolen goods or woolen yarn is made of a mixture in a chamber Exposed to sulfur dioxide and chlorine or one after the other in any order individually the sulfur dioxide and the chlorine. Trapped gas is caused by a stream warm air and finally the goods washed and dried.

Claims (1)

Claim: . Process for finishing wool, thereby characterized that .the same with sulfuryl chloride in solution or in vapor form or with its components sulfur dioxide and chlorine "treated, then washed with water and or, or with solutions of acid-binding substances will.