Sodium Percarbonate (Uncoated)
STPP
LABS
LAB
Calcium Carbonate
Sodium Perborate (Mono)
Sodium Perborate (Tetra)
Sodium Phosphate
Sodium Silicate
Sodium Sulphite
Zeolite

TAED

(Tetra Acetyl Ethylene Diamine)

Recommedn Site

Many household and personal care products are formulated with an active oxygen-releasing material to effect removal of stain and soil. Oxygen-releasing materials have an important limitation; their activity is extremely temperature-dependent. Temperatures in excess of 60 DEG C are normally required to achieve any bleach effectiveness in an aqueous wash system. Especially for cleaning fabrics, high-temperature operation is both economically and practically disadvantageous. Thus, bleaching activators have been applied in an object to activate bleaching reaction at low temperatures.

As the most commercialized low temperature bleaching activator, TAED is typically applied in domestic laundry detergents, automatic dish washing, bleach boosters, laundry soak treatments, to improve the washing performance. TAED could be applied in textile bleaching to react with hydrogen peroxide in the bleach bath to produce a stronger oxidant. The use of TAED as bleach activator enables bleaching at lower process temperatures and under milder pH conditions.In pulp and paper industry, TAED is suggested to react with hydrogen peroxide to form a pulp bleaching solution. The addition of TAED into pulp bleaching solution results in a satisfactory bleaching effect.TAED used for detergent industry is in granular form, free-flowing, and has several colors (mainly white, green, blue) to choose depending on users¡¯ choice.

Why use TAED in oxygen bleach system?
Many household and personal care products are formulated with an active oxygen-releasing material to effect removal of stain and soil. Oxygen-releasing materials have an important limitation; their activity is extremely temperature-dependent. Temperatures in excess of 60 DEG C are normally required to achieve any bleach effectiveness in an aqueous wash system. Especially for cleaning fabrics, high-temperature operation is both economically and practically disadvantageous. Thus, bleaching activators have been applied in an object to activate bleaching reaction at low temperatures. These activators, also known as bleach precursors, often appear in the form of carboxylic acid esters or amides. In an aqueous liquor, anions of hydrogen peroxide react with the ester or amide to generate a corresponding peroxyacid which oxidizes the stained substrate. Commercial application of this technology is found in certain fabric bleaching detergent powders that mainly incorporating tetraacetylethylenediamine (TAED).

Laundry hygiene benefits with activated bleach system?
Compared with the peroxide bleach alone, bleach system activated with TAED in detergent formulations has significantly improved the washing performance in following aspects:
>> Effective low temperature bleaching;
>> Energy savings;
>> Protection of fibers and colours;
>> Disinfective action
>> Improvement of odour and general washing effect;
>> Reduction of the peroxide quantity

Textile bleaching with TAED activator.
TAED could be applied in textile bleaching to react with hydrogen peroxide in the bleach bath to produce a stronger oxidant. In traditional peroxide bleaching process the reaction temperature should be high enough to enable the bleach action, which usually resulting in a big energy consumption and the incapability of bleaching heat sensitive fabrics. The use of TAED as bleach activator enables bleaching at lower process temperatures and under milder pH conditions. Such bleaching conditions are particularly suited to today¡¯s sensitive synthetic fibers and complex fabric blends. Thus, TAED incorporated bleaching distinguish itself from traditional processes through following benefits:
>> Lower processing costs and increased productivity;
>> Improved product quality, e.g. fabric whiteness, fiber strength;
>> Broader bleach application on a wide range of materials.

Oxygen bleaching of pulp using TAED activator.
Oxygen based bleaching is used for pulp bleaching because of its environmental benefits and oxidizing power, But pulp bleaching by hydrogen peroxide alone suffers from some performance disadvantages such as the reduction of whiteness, fiber length and loss of strength, as well as the poor delignification performance. For the sake of avoiding such disadvantages, TAED is suggested to react with hydrogen peroxide to form a pulp bleaching solution. The addition of TAED into pulp bleaching solution results in a satisfactory bleaching effect.
? Improved quality in e.g. colour reversion properties, fiber strength, brightness, shade;
? Lower reaction temperature, lower energy cost, shorter operation term

The TAED/Sodium Perborate ratio in detergent formulations.
Detergent manufacturer have two ways of optimizing the use of TAED system. First of all, the detergent action of the system is increased when the pH of the solution is lowered to less than 10 during washing, secondly, there is the possibility of optimizing the TAED/PBS ratio of existing formulations.
Solely on a computational basis, the TAED to sodium perborate tetrahydate (hereinafter PBS4) should be 1:1.35 percent by weight. When using sodium perborate monohydrate (hereinafter PBS1), it should be 1:0.9. Commercial available detergent powder normally contain 0.5%~2.5% TAED in addition to 20%~25% PBS4 or 10%~18% PBS1. A considerable PBS, which does not have a bleaching effect at low temperatures, thus ends up unused in the wastewater when washing at 40 Degree C. By optimizing the TAED/PBS ratio, it is possible to achieve the maximum detergent action of the system. Recent investigations have shown that optimum detergent action is achieved with a TAED to PBS4 ratio of 4:9; and with a ration of 4:6 when using PBS1. Ideally, a detergent formulation should therefore contain 4%~5% TAED and 9%~15% PBS4 or 6%~10% PBS1. Any PBS still remaining is required in order to make up losses incurred during storage as well to compensate for losses by catalases possibly present in the detergent solution that promote the decomposition of hydrogen peroxide.
TAED quantities of less than 0.5% do not lead to notable bleach performance; increases up to 5% are associated with a constant rise in remission. Quantities of more than 6% TAED in the formulation only provide insignificant improvement in the bleaching performance of the entire formulation.

TAED in detergent and bleach formulations.

1. Conventional detergent powders (TAED, 0.5%~3%)

Ingredients

% By WT.

TAED

2.5

Sodium Perborate Monohydrate

10

Zeolite

28

Sodium Carbonate

20

Sodium Silicate

4

PCAs

4

Surfactants

15

Enzymes

0.5

Optical Brightners

0.3

Sodium Sulfate

9

Perfume

0.2

Antiredecomposition Agents

1

Moistures

5

Total

100

2. Compact detergent powders (TAED, 3%~8%)

Ingredients

% By WT.

TAED

5

Sodium Perborate Monohydrate

15

Zeolite

24.5

Sodium Carbonate

20

Sodium Silicate

4

PCAs

4

Surfactants

15

Enzymes

0.5

Optical Brightners

0.3

Sodium Sulfate

5

Perfume

0.2

Antiredecomposition Agents

1

Moistures

5

Total

100

3. Oxygen Bleach Powder (TAED, 8%~20%)

Ingredients

% By WT.

TAED

15

Sodium Perborate Monohydrate

45

Sodium Carbonate

40

Total

100