DD214144A1 - PROCESS FOR BLEACHING SOLID SURFACES - Google Patents

Abstract

The invention relates to a process for bleaching solid surfaces, in particular textiles in washing and cleaning agent liquors containing peroxygen compounds. The object of the invention is to provide a process for improving the bleaching performance of inorganic peroxygen compounds. It has been found that the object is met when for bleaching a combination of 0.4-0.75 g / l of an inorganic peroxygen compound and 0.8-1.2 g / l of a crystalline aluminosilicate of the composition (M low 2 O) is used. deep xx Al deep2 O deep3 x (SiO deep2) deep y, where M is a monovalent cation, x is a number between 0.7 and 1.4, and y is a number between 1.6 and 3.0, and the bleaching process in the temperature range of 60 degrees to 100 degrees C, in particular between 80 degrees and 100 degrees C drains. Compliance with the proportions between sodium perborate and aluminosilicate is essential for the process according to the invention.

Description

Title of the invention;

Process for bending solid surfaces

Field of application of the invention;

The invention relates to a process for bleaching solid surfaces, in particular textiles, in washing and cleaning agent liquors containing inorganic peroxygen compounds.

Characteristic of the known technical solutions

DD-PS 112 673 describes the use of aluminosilicates of the formula (Na ₃ O) ₃ . Al ₃ O ₃ . (.SiO ₂ ) _y (x = - 0.7 - 1.5 and y = 0.8 6) in detergents and cleaners for the purpose of a partial or complete replacement of Pentanatriurntriphosphat claimed. The mode of action is based on the known capability of aluminosilicates for ion exchange, in particular for the alkaline earth metal ions which interfere with the washing and cleaning process. The stabilizing effect of the aluminosilicate on peroxide-containing solutions which occurs due to binding of heavy metal ions is known. "Although such stabilization leads to a reduction in tissue damage, a positive effect on the bleaching ability is not observed in the presence of stabilizers.

Furthermore, it is known that for the purpose of positively influencing the bleaching ability of inorganic peroxygen compounds such. 3, - Sodium perborate or Natriumcarbonatperoxohydrat, heavy metal complexes can be used as catalysts.

η ι-ϊ Κ

ft β

DE-OS 2 657 043 describes the use of defined iron complexes of aminopolycaric acids. The use of copper salts in combination with chelating agents is claimed in a variety of patents (e.g., U.S. Patent Nos. 3,211,658, 3,991,000, and 2,975,139). A positive influence on the bleaching ability is also achieved by the use of cobalt salts in combination with pyridinecarboxylic acids wei den (US-PS 3,156,654).

Uachteilig for the cited solutions is the fact that in order to avoid catalysis of unwanted decomposition reaction of, peroxides a precise in practical-hardly realizable setting defined lletallionenkonzentrationen is required. Furthermore, an addition of heavy metal compounds is not safe from an ecological point of view

 It is also known that aluminosilicates are used in washing and cleaning processes to achieve corrosion protection effects (DE-OS 2 143 771).

Object of the invention

The aim of the invention is to avoid the disadvantages set out and to develop a process for improving the bleaching ability of inorganic peroxygen compounds which are used in washing and cleaning agent liquors for solid surfaces, in particular textiles.

Explanation of the invention of the invention

It has been found that this objective is met when bleaching a combination of

a) from 0.4 to 0.75 g / l of an inorganic peroxygen compound and

b) 0.8 - 1.2 g / l of a crystalline aluminosilicate of the composition (Mp ^^ x * -a-lpO- ,. (SiOg) " _T , where M is a monovalent cation, χ is a number between 0.7 and 1.4 and y represent a number between 1.6 and 3jO is used.

It has surprisingly been found that a catalytically ^ improving Bleichvermö'gens in the temperature range of 60 to 100 ⁰ C, preferably can be achieved between SO and 100 ⁰ C, if crystalline aluminosilicate and Natrlumperborat be used in defined weight ratios. Compliance with the mass ratios is essential for the process of the invention.

As application-technological investigations show, the application of the method according to the invention results in the following advantages in comparison with known technical solutions:

- Improvement of bleaching ability

- If the consistency remains constant, the content of peroxygen compounds can be reduced.

- No increased tissue damage in the cleaning process in textiles made of virgin fiber material

- No additional pollution of wastewater due to environmentally hazardous heavy metal compounds

Out of leadership examples

The effectiveness of the method according to the invention was determined under practical conditions using formulations A to F. To carry out the experiments, a "Scourotester" laboratory washing machine was used. Test conditions: Wash time 30 min., Total concentration 5 g / 1? Liquor ratio 1: 8.0, temperature: 90 ^° C. For testing, a cotton fabric dyed with Sulfur Green B was used. The evaluation was carried out by comparing the difference between the measured remission rates before and after the second wash. The bleaching power of Formulation A was set at 100 % and the results compared using Formulations 3 to F relative thereto.

Recipe A

O ₃ 6 g / l ifatrium perbora 4.4 g / l perborate-free commercial detergent

Recipe B

0.6 g / l sodium perborate 1.0 g / l aluminum silicate 3.4 g / l perborate-free commercial detergent

Recipe C

0.6. g / l Batrium perborate 0.25 g / l aluminosilicate 4.15 g / l perborate-free commercial detergent

Recipe D

0.6 g / l sodium borate 0.6 g / l aluminosilicate 3.8 g / l perborate-free commercial detergent

Recipe B

0.4 g / l sodium perborate 4.6 g / l perborate-free commercial detergent

Recipe P

0.4 g / l of IT sodium perborate 1.0 g / l aluminosilicate 3.6 g / l perborate-free commercial detergent

The test results are shown in the following table:

Recipe % rA

Recipe% r., A,

I'VJÜ D 102 3 11/1 I I ι e 34 C ι oo F 101

Claims (2)

Invention claim. 1. The invention relates to a method for bleaching solid , Surfaces, in particular textiles, washing and cleaning liquors containing peroxygenated compounds characterized in that a combination of bleaching a) from 0.4 to 0.75 g / l of an inorganic peroxygen compound and b) 0.8-1.2 g / l of a crystalline aluminosilicate of the composition (^ o ° 'x * ^λ1 2 ° 3 * ( ^Si0 o) _v > where M is a monovalent cation, χ is a number between 0.7 and 1 , 4 and y represent a number between 1.6 and 3 »0, is used» 2. The method according to item 1, characterized in that the use of the combination takes place at liquor temperatures between SO ⁰ and 100 ⁰ C, preferably between 80 ° and 100 ⁰ G. λ to β 7 -msq * iV7rl ·!