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

Sodium Percarbonate

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Sodium percarbonate (Synonyms: sodium carbonate peroxyhydrate, sodium carbonate peroxide, PCS) is a free-flowing powder with a common name of solid hydrogen peroxide, it is an addition compound of sodium carbonate and hydrogen peroxide. Percarbonate has an active available oxygen content which is equivalent to 27.5% H2O2. It breaks down to oxygen, water and sodium carbonate upon decomposition. It's an environmentally safe bleaching agent.

Sodium Percarbonate offers many of the same functional benefits as liquid hydrogen peroxide. It dissolves into water rapidly to release oxygen and provides powerful cleaning, bleaching, stain removal and deodorizing capabilities. It has a wide range of applications in various cleaning products and detergent formulations including heavy duty laundry detergent, all fabric bleach, wood deck bleach, textile bleach and carpet cleaner. Other applications have been explored in personal care formulations, denture cleaners, pulp and paper bleaching process, and certain food bleaching applications. The product also has functions as disinfector for institutional and home applications, oxygen releasing agent in aquaculture, waste water treatment chemical, first-aid oxygen generating agent, etc.

Percarbonate is used as an activated oxygen component in detergents, bleaches and cleaning agents. Due to the unsatisfactory storage stability of the uncoated sodium percarbonate in warm/moist surroundings and in the presence of certain detergent and cleaning agent components, percarbonate must be stabilized against the loss of active oxygen. An essential principle of stabilization involves encasing the percarbonate particles in a coating of components having a stabilizing action. Here comes the definition: the coated sodium percarbonate is the crystals coated with single or multiple layers of various substances in order to increase active oxygen stability and optimize storage and ensiling properties.

Coated sodium percarbonate is the more commonly commercialized peroxide compared with the uncoated type. But the uncoated product is still the preferred ingredient for simply mixing with enough quantity of soda ash and some surfactants to form the popular oxygen bleaches.

Sodium percrabonate has a wide range of applications in various solid detergent products and all fabric bleaches. We may also find its usages in oxygen release compositions, personal care formulations, disinfectants, food bleaches, pulp and paper bleaches and textile bleaches, etc.

What are the advantages of sodium percarbonate?

Compared with chlorine bleaching chemicals that have contaminations on the environment, sodium percarbonate is an environmentally friendly chemical which decomposes into oxygen, water and natural soda ash when in contact with hydrous media.
Sodium percarbonate is increasingly being the substitute for sodium perborate in detergent formulations due to its lower dissolving temperature in water, as well as the characteristic of no contamination on soil, as sodium perborate is made of borax which is found to have negative impact on the soil quality.
Detergent or bleach compositions formulated with sodium percarbonate have an strong stain removal capability. It is very effective as a laundry presoak for heavily stained articles. It is color safe. It brightens colors and prevent fabric form become yellowed or darkened.
Sodium percarbonate is effective as a disinfectant on both bacteria and virus. It¡¯s an excellent ingredient in personal care and home care formulations for hygiene.
For its environmental advantages, sodium percarbonate is a good oxygen release chemical for agricultural and aquicultural applications.

What¡¯s the difference between the coated and uncoated sodium percarbonate?

Sodium percarbonate is used as an active oxygen component in detergents, bleaches and cleaning agents. Due to the unsatisfactory storage stability of the uncoated sodium percarbonate in warm/moist surroundings and in the presence of certain detergent and cleaning agent components, sodium percarbonate must be stabilized against the loss of active oxygen. An essential principle of stabilization involves encasing the sodium percarbonate particles in a coating of components having a stabilizing action. Here comes the definetion: the coated sodium percarbonate is the sodium percarbonate crystals coated with single or multiple layers of various substances in order to increase active oxygen stability and optimize storage and ensiling properties.
Coated sodium percarbonate is the more commonly commercialized peroxide compared with the uncoated sodium percarbonate. But the uncoated product is still the preferred ingredient for simply mixing with enough quantity of soda ash and some surfactants to form the popular oxygen bleaches.

How to make sodium percarbonate based oxygen bleach system stable in powder detergent formulations?

Detergent compositions containing sodium percarbonate are known in the art. Sodium percarbonate is an attractive perhydrate for use in detergent compositions because it dissolves readily in water, is weight efficient and, after giving up its available oxygen, provides a useful source of carbonate ions for detergency purposes.
However, the inclusion of percarbonate salts in detergent compositions has been restricted by the relative instability of the bleach both as is and in use. Sodium percarbonate loses its available oxygen at a significant rate in the presence of ions of heavy metals such as iron, copper and manganese and also in the presence of moisture, these effects being accelerated at temperatures in excess of about 30.degree. C. To solve this problem, several solutions have been found.
1, Sodium percarbonate is coated with a hydrophobic substance or the like.
2, Magnesium silicate is incorporated in a detergent composition containing sodium percarbonate.
3, A chelating agent which forms an easily water-soluble metal chelated compound such as nitrilotriacetate (NTA) or ethylene diamine tetraacetate (EDTA) is incorporated in a detergent composition.
4, Zeolite A is replaced by maximum aluminium zeolite P (zeolite MAP) since zeolite MAP itself is of greater liquid carrying capacity than zeolite A.
5,The elimination of impurities, such as heavy metals which catalyze the decomposition reaction during detergent processing, alleviates the instability of aqueous SCP solutions.
6, Provide sufficient sodium carbonate in the composition to be able to combine with all of the available water in the composition to form sodium carbonate monohydrate. the term "available water" includes water chemically available as hydrogen peroxide, water of crystallization of sodium carbonate hydrates and free water which may temporarily exist in the composition.

What's the amount of sodium percarbonate to be formulated in bleach and detergent compositions?

Oxygen Bleach Type

Ingredients

% By WT.

Home Laundry Bleach

Premium Grade

Sodium Percarbonate

25.0

Soda Ash

50.0

Nonionic Surfactant

3.0

Sodium Sulfate

22.0

Total

100.0

Home Laundry Bleach

Economy Grade

Sodium Percarbonate

25.0

Soda Ash

75.0

Total

100.0

Institutional Laundry Bleach

Sodium Percarbonate

80.0

Soda Ash

20.0

Total

100.0

Concrete Cleaner

Sodium Percarbonate

78.0

Soda Ash

20.0

Nonionic Surfactant

2.0

Total

100.0

Vinyl Siding Cleaner

Sodium Percarbonate

28.0

Soda Ash

72.0

Total

100.0

Wood Deck Cleaner and Stain Remover

Sodium Percarbonate

80.0

Soda Ash

10.0

Sodium Tripolyphosphate

10.0

Total

100.0

Marine Teak Cleaner

Sodium Percarbonate

58.0

Soda Ash

40.0

Nonionic Surfactant

2.0

Total

100.0

Powder dertergents

Ingredients

% By WT.

Standard detergent base

PCS(8~15%, by WT.)

Sodium Percarbonate

12.5

Soda Ash

16.4

Nonionic Surfactant

4.1

Linear alkylbenzene sulphonate

9.0

Zeolite MAP (as anhydrous)

37.7

Acrylic/maleic copolymer

4.0

Sodium alkaline silicate

0.6

SCMC

0.8

Fluorescer

0.3

Soap

2.5

Moisture (nominal) 12,2