LEAD STABILIZER (LS)
Lead Stabilizers are classified as inorganic Lead compound. Lead
based compounds have been used in various products to stabilize
rigid PVC in construction industry. Lead Stabilizer has high heat
stability, processing fluidity & lubricating ability. Lead
Stabilizer is stored in dry, ventilating and low temperature
environment place and must be away from moisture & fire. Lead
Stabilizers are mostly used as PVC Stabilizers, and this is
particularly used for electrical power cable applications. Lead
Stabilizers have specific gravities which is 3 to 5 times higher
than the PVC. Lead Stabilizer has good electrical resistance and low
water absorption. The Lead Stabilizers are locked into the PVC
matrix.
The Lead based stabilizers used in PVC are the following
|
Tribasic Lead Sulphate |
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Tribasic Lead Sulphate is very effective heat Stabilizer |
|
Dibasic Lead Phthalate |
- |
Dibasic Lead Phthalate is used for cable insulation |
|
Dibasic Lead Stearate |
- |
Dibasic Lead Stearate is heat Stabiliser and a Lubricant |
|
Dibasic Lead Phosphite |
- |
Dibasic Lead Phosphite is used for the heat and light
Stabilizer |
Characteristics
Lead Stabilizers react with the Hydrochloric Acid
(HCl) liberated by PVC during the thermal degradation. Lead
Stabilizer is stored in a dry place and it must be keep away from
sunlight or high temperature. It is soluble in Alcohol and easy
burning.
|
Color |
- |
White or Light Yellow Flake |
|
Solubility |
- |
Insoluble in Water |
Applications
-
Lead Stabilizers are mostly used as PVC compounds e.g. PVC
Stabilizers for durability.
-
Lead Stabilizer is used in flexible PVC cable and wire (electric)
due to excellent electrical insulation features.
-
Lead Stabilizer is particularly used for PVC Tube, Pipe and PVC
board.
-
The
Lead Stabilizers is that the Lead Chloride formed during the
stabilizing process has no destabilizing effect on the PVC; it is a
major advantage of Lead Stabilizer.
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