 MCA |
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Product Description |
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It is a salt of melamine and cyanuric acid,
above 32 C degree, it undergoes endothermic decomposition
to melamine and cyanuric acid and acting as a heat sink
in the process. The vaporised melamine acts as an inert
gas source diluting the oxygen and the fuel gases present
at the point of combustion. The cyanuric acid acts to
decomposed the polymer thus rapidly removing it from the
combustion source. In this case, there are three types
of flame retardant mechanisms at play.
Chemical name: Melamine Cyanurate
Synonymous: Melaflam®MC
Formula: C6H9N9O3
Molecular Weight: 255.2
Physical appearance: fine, white, crystalline powder,
IR spectrum
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Physical
& chemical properties : |
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Melamine |
Min.99.5%
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Moisture
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Max.0.2% |
PH
value |
5-6(saturated
sol.@20℃) |
Excess cyanuric acid
|
Max.0.2%
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Excess
melamine
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Max.0.3%
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Specific
gravity
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1.70g/cc
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Apparent
density |
300-400kg/cc
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Solubility
in water
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Max.0.001g/100mlH2O@20℃
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Particle
size: |
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MC-8 D50%: max. 2um, D98%: max. 8um
MC-25 D50%: max. 4um, D98%: max. 25um
MC-50 D50%: max. 10um, D98%: max. 50um |
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Counter
grades: |
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Ciba Melapur®MC-25 D50%: max. 4um, D98%: max.
25um
Ciba Melapur®MC-50 D50%: max. 10um, D98%: max. 50um
Remark: Ciba Melapur series Melamine Cyanurate
is made by DSM, but DSM doesn't produce MC-8.
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Handling: |
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Packaging: PE bags in cardboard boxes
Bag weight: 20 kg net
Storage: Dry, at room temperature
Transport Class.: RID / ADR: not restricted
Tariff Nr.: 29336980
Toxicity (oral, rat): > 4000 mg/kg |
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Advantages: |
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Melamine Cyanurate
is a halogen-free flame retardant for polyamide.
Melamine Cyanurate has established itself as the
flame retardant of choice to achieve UL94 V-0 especially
for unfilled polyamide 6 and 6,6.
Some of its attributes include cost effectiveness,
excellent electrical and mechanical properties and
colorability. It is also a safe material to use
from a handling standpoint, as well as in fire situations
in compounds. A good balance between flame-retardant
effectiveness and thermal stability of Melamine
Cyanurate provides for easy processing at the compounding
stage. |
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Extrusion data:
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Extruder: ZSK 30/33, W+P, twin screw, synchronous
Screw Speed 150 Rpm
L/D: 33
Residence time FR: 50 - 60 sec.
Output: 12 kg/h (85% torque)
Vacuum: - 0.5 bar |
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Extruder setting:
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| Feeding position |
PA+MC |
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Heating zones Motor
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
Nozzle |
Temp. (PA6,6)
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280 |
280 |
280 |
280 |
280 |
275 |
275 |
270 |
270 |
| Temp. (PA6) |
260 |
260 |
260 |
260 |
260 |
255 |
255 |
250 |
250 |
Actual temperature of the melt (nozzle):PA66<280°C,
PA6<260°C |
Formulation dosage:
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Polyamide PA66 90-92%
Flame Retardant Melaflam®MC 8-10%
Polyamide PA6 90-92%
Flame Retardant Melaflam®MC 8-10%
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