DE1107632B - Method for treating textiles - Google Patents

Description

It is known peroxide compounds, for example Hydrogen peroxide, sodium peroxide, sodium perborate and the like in detergents and bleaches to be used for all types of fiber. In some cases, when they are used, certain arise Difficulties because you have to use relatively high temperatures to get the desired one Wants to achieve a bleaching effect. You usually go almost to the boiling point when washing. Hot washing and bleaching baths require a great deal of heat and are used, for example, for washing machines not usable.

For the reasons mentioned, so-called activators have been proposed which and bleaching processes with peroxides even at lower temperatures and still usable Whitening effect and good stain removal lead. These activators include, among others Formamide, amides of unsaturated lower carboxylic acids, organic nitriles, di- and polybasic anhydrides Carboxylic acids and anhydrides of unsaturated carboxylic acids.

It is also known that the pyrophosphoric acid esters of fatty alcohols with hydrogen peroxide Form stable complex compounds that are also used as components of bleaches and detergents can. These compounds are characterized by a particularly high stability and give z. B. at Room temperature decreases the active oxygen more slowly than sodium perborate; they work beyond that also as stabilizers for sodium peroxide, sodium perborate and other inorganic persalts.

It has now been found that the reaction products of acylating agents - such as Aceiyl Chloride - Whole With Esters Of Phosphoric Acid are excellent activators.

Such acylated esters have, for example, the formulas

C ₂ H ₅ -O _x

r Jl \ J '\ _ ^''"""V ^ Χίο

C, H _S - O "

c, h _s -o-p;

, O —C —CH,

O - C-CHo

Applicant:

German gold and silver refinery

formerly Roessler, Frankfurt / M.,

Weißfrauenstr. 9

Dr. Karl Dithmar

and DipL-Chem. Dr. Elfriede Naujoks, Frankfurt / M., Have been named as the inventor

and are obtained in a manner known per se. They are characterized by a good activating effect, sufficient stability and a pleasant smell.

It has also been found that even relatively small amounts of the activators give a good effect in peroxide baths; 0.1 to 1.OMol per mole of active oxygen, calculated as H ₂ O ₂ , is sufficient.

The bleaching or washing liquors, which peroxide compounds and the activators according to the process can also contain stabilizers, buffer substances, wetting agents, detergent substances, fiber protection agents known per se and optical brighteners are added. The best effects according to the invention will be achieved in neutral, weakly acidic or weakly alkaline wash liquors.

For the action of the activators it is important that they are in the wash liquor directly together with the Per connections or shortly before or shortly afterwards, so that a cooperation is ensured is.

example

A cellulose tissue boiled with red wine is made with the Zeiss-Elrepho whiteness knife against the white standard 565 and filter 6 measured, resulting in 31.0% white.

109 609/499

^r ί 107

10

This tissue is kept above 60 ° C in -45 minutes Washed resting liquor, which contains the following substances per liter:

1,250g alkyl sulfate,. '. . . ■ - ,,.; .

0.625 g sodium pyrophosphate,
0.625 g sodium tripolyphosphate,
0.350 g dry water glass, 0.600 g sodium perborate,
0.980 g of diethyl monoacetyl phosphate (of the formula above). ; "...

The _pH value is 7.5 to 8.0. The treated fabric is rinsed, dried and again examined for its whiteness as above. The result is 69.4% white.

One washed under otherwise identical conditions, but in the absence of diethyl monoacetyl phosphate Fabric only shows a whiteness of 48.0%.

Claims (4)

PATENT CLAIMS: 1. A method for treating fibers, yarns, woven, knitted or textile goods made from natural or synthetic fibers with peroxides containing aqueous solutions or suspensions "oil presence of an activating agent, characterized in that the activating agent used is a reaction product of an ester of phosphoric acid with an acylating agent used. 2. The method according to claim 1, characterized in that per mole of peroxidic oxygen 0.1 to 1.0 moles of the activating agent are used. 3. The method according to claim 1 or 2, characterized in that the treatment at temperatures between 60 and 8O ⁰ C is carried out. 4. The method according to any one of claims 1 to 3, characterized in that conventional stabilizers, Wetting agents and / or fiber protection agents are present. Considered publications:
British Patent No. 425 804. © KW 60Ϊ / 49 «· 5.61