| 1. What is Sodium Percarbonate? |
Sodium Percarbonate (or sodium carbonate peroxyhydrate) is an addition
compound of sodium carbonate and hydrogen peroxide. When dissolved
into water, its releases H2O2and soda ash
(sodium carbonate).
2Na2CO3 . 3H2O2 --->
2Na2CO3 + 3H2O2
The pH of the resulting solution is typically alkaline, which
activates the H2O2 for bleaching. The dry
powder contains about 30% w/w H2O2. |
| 2. What are the applications of Sodium Percarbonate? |
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. |
| 3. 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 is 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. |
| 4. Why is Shaoxing Biotech Chemical believed
to be a reliable supplier of Sodium Percarbonate in the world market? |
Shaoxing Biotech Chemical
has been producing Sodium Percarbonate
for more than a decade. Due to its abundant R & D investment
and tech innovation,Shaoxing Biotech Chemical
is able to provide
its customers with different specs of quality coated and uncoated
Sodium Percarbonate.Shaoxing Biotech Chemical
currently has a production capability of 100,000mt
annually which can meet customers's increasing demands on a sustainable
base. You feel satisfied with the cooperation with Shaoxing Biotech Chemical
not only for the reason of good product quality, timely and safe
delivery, but also the excellent after market service and tech
support. |
| 5. What are 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. |
| |
| 6. How to make PCS 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. |
| 7. 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 |
| Home Laundry
Bleach Concentrated Grade |
Sodium Percarbonate
|
80.0 |
| Soda Ash |
20.0 |
| 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 |
| Household Dishwashers
(Tablet Form) |
Citrate |
30.0 |
| Sodium Carbonate |
15.0-30.0 |
| Sodium Percarbonate |
5.0-15.0 |
| Polyasparaginic Acid |
5.0-15.0 |
| Sugar Surfactants |
1.0-5.0 |
| 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 |
|
