Flame Retardants
Flame Retardant MPP
Melamine Polyphosphate
The halogen-free P-N FR engineered for glass-filled polyamide electrical parts.
Product Description
Melamine polyphosphate (MPP) combines a phosphorus acid source with a nitrogen blowing source in one polymeric molecule, providing built-in P-N synergy. In glass-filled polyamide 6 and 66, MPP promotes dense char formation in the condensed phase while nitrogen dilutes the flame gases.
MPP's decisive advantage in electrical applications is its non-conducting, non-corrosive action: unlike halogen systems, it leaves no ionic residues that raise leakage currents on connector surfaces, and it does not corrode molds or contacts. Glass-filled PA66 with 25–30% MPP reaches UL 94 V-0 at 0.8–1.6 mm while retaining useful impact strength.
Aolong MPP is produced with controlled particle size (D50 ≈ 3–5 μm) and thermal stability to 350 °C, surviving polyamide compounding without degradation.
Key Features
- Built-in P-N synergy in one molecule
- Non-corrosive, non-conductive — ideal for electrical parts
- UL 94 V-0 in GF PA6/PA66 at 25–30% loading
- Thermally stable to 350 °C compounding
Applications
- Glass-filled PA6/PA66 connectors and housings
- Electrical switchgear and circuit breakers
- Automotive under-hood polyamide parts
- Thermoset and epoxy systems
- Intumescent coating synergist
Specifications
| CAS No. | 20208-95-1 |
|---|---|
| Molecular Formula | (C3H9N6O4P)n |
| Molecular Weight | n/a (polymeric) |
| Appearance | White fine powder |
| P Content | 12 – 14% |
| N Content | ≥ 26% |
| Particle Size (D50) | 3 – 5 μm |
| Thermal Loss (350 °C) | ≤ 1% |
Packaging & Storage
25 kg woven PP bag with PE liner, 500 kg jumbo bag. Store cool and dry; shelf life 24 months in original sealed packaging.
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