Alias: Melamine Cyanurate
CAS No.: 37640-57-6
Formula: C6H9N9O3 | Molecular Weight: 255.2
MCA (Melamine Cyanurate)
MCA, or Melamine Cyanurate, is a halogen-free nitrogen-based flame retardant for nylon, especially PA6 and PA66. It is a white powder that is non-toxic, odorless, smooth to the touch, insoluble in water and most organic solvents.
Key Features
- Low application cost with favorable electrical, mechanical and coloring properties.
- MCA: D50 ≤ 2 μm; D98 ≤ 8 μm.
- MC15: D50 ≤ 2.5 μm; D98 ≤ 15 μm.
- MC25: D50 ≤ 4 μm; D98 ≤ 25 μm.
- MC50: D50 ≤ 4 μm; D98 ≤ 50 μm.
APPLICATIONS
MCA is used as a halogen-free flame retardant for nylon, particularly pure PA6 and PA66 systems. Based on the provided information, the recommended formulation can achieve a UL 94 V-0 flame-retardant rating. Formulations and processing conditions should be adjusted according to the actual requirements of each manufacturer.
QUALITY STANDARD
| Item | Unit | Standard |
|---|---|---|
| Melamine Cyanurate | % | ≥99.5 |
| Residual Cyanuric Acid | % | ≤0.2 |
| Residual Melamine | % | ≤0.3 |
| Whiteness | — | ≥96 |
| Volatile Matter | % | ≤0.2 |
| pH Value | — | 5-7 |
| Specific Gravity | g/cm³ | 1.7 |
| Bulk Density | g/cm³ | 0.3-0.4 |
| Water Solubility | g/100 ml water | 0.002 at 20°C |
RECOMMENDED APPLICATION IN NYLON
| Base Resin | Base Resin Ratio | Flame Retardant | Flame Retardant Ratio |
|---|---|---|---|
| PA6 | 88-90% | MCA | 12-10% |
| PA66 | 90-92% | MCA | 8-10% |
The above is a recommended formulation for reference only. Manufacturers should adjust the formulation or add additives according to the actual processing requirements.
EXTRUSION DATA
| Material | Zone 1 | Zone 2 | Zone 3 | Zone 4 | Zone 5 | Zone 6 | Zone 7 | Zone 8 | Zone 9 |
|---|---|---|---|---|---|---|---|---|---|
| PA6 | 235 | 240 | 240 | 240 | 240 | 245 | 245 | 245 | 245 |
| PA66 | 250 | 260 | 260 | 260 | 260 | 260 | 260 | 265 | 265 |
Temperature unit: °C. Zone 8 is the vacuum zone; Zone 9 is the discharge zone. The above data is for reference only.