Covestro Makrolon® 9425 PC Resin
Makrolon 9425 Polycarbonate Granules 20% glass fiber reinforced
Makrolon® 9425 is a 20% glass fiber-reinforced, flame-retardant polycarbonate resin. With UL 94 V-0 (1.5mm) and 5VA (3.0mm) ratings, high viscosity, and easy-release properties, it excels in extrusion and injection molding. Ideal for opaque, high-safety industrial parts.
Plastic Granules
Typical property data
Physical Properties (Rheological)
- Melt volume-flow rate (300 °C/1.2 kg): 5.0 cm³/10 min (ISO 1133)
- Melt mass-flow rate (300 °C/1.2 kg): 6.0 g/10 min (ISO 1133)
- Molding shrinkage (parallel): 0.35 % (ISO 294-4)
- Molding shrinkage (normal): 0.45 % (ISO 294-4)
- Molding shrinkage (range, parallel/normal): 0.3–0.5 % (ISO 2577)
Mechanical Properties (23 °C/50 % r. h.)
- Tensile modulus (1 mm/min): 5800 MPa (ISO 527-1,-2)
- Stress at break (5 mm/min): 86 MPa (ISO 527-1,-2)
- Strain at break (5 mm/min): 2.6 % (ISO 527-1,-2)
- Tensile creep modulus (1 h): 5700 MPa (ISO 899-1)
- Tensile creep modulus (1000 h): 5200 MPa (ISO 899-1)
- Flexural modulus (2 mm/min): 5500 MPa (ISO 178)
- Flexural strength (2 mm/min): 135 MPa (ISO 178)
- Charpy impact strength (23 °C): 40 kJ/m² (ISO 179/1eU)
- Charpy notched impact strength (23 °C, 3 mm): 8 kJ/m² (ISO 21305/ISO 179/1eA)
Thermal Properties
- Temperature of deflection under load (1.80 MPa): 138 °C (ISO 75-1,-2)
- Temperature of deflection under load (0.45 MPa): 142 °C (ISO 75-1,-2)
- Vicat softening temperature (50 N, 50 °C/h): 146 °C (ISO 306)
- Burning behavior (1.5 mm): UL 94 V-0 (UL 94)
- Oxygen index: 35 % (ISO 4589-2)
- Relative temperature index (Electrical strength, 1.5 mm): 130 °C (UL 746B)
Electrical Properties (23 °C/50 % r. h.)
- Relative permittivity (100 Hz): 3.3 (IEC 60250)
- Relative permittivity (1 MHz): 3.3 (IEC 60250)
- Dissipation factor (100 Hz): 10 × 10⁻⁴ (IEC 60250)
- Dissipation factor (1 MHz): 90 × 10⁻⁴ (IEC 60250)
- Volume resistivity: 1 × 10¹⁴ Ohm·m (IEC 62631-3-1)
- Electrical strength (1 mm): 36 kV/mm (IEC 60243-1)
Other Properties (23 °C)
- Density: 1340 kg/m³ (ISO 1183-1)
- Water absorption (equilibrium at 23 °C, 50% r. h.): 0.10 % (ISO 62)
- Glass fiber content: 20 % (ISO 3451-1)
Processing and Drying Conditions
- Melt temperature: 280–320 °C (Recommended range)
- Mold temperature: 80–120 °C
- Dry air drying temperature: 120 °C
- Dry air drying time: 2–3 hours
- Moisture content (max.): ≤ 0.02 %
Use & Applications
- Electrical Enclosures & Connectors: Flame-retardant safety in circuit breakers or control panels.
- Automotive Components: Engine covers/sensors needing heat resistance and strength.
- Industrial Machinery: Gears/brackets requiring stiffness and UL compliance.
- Safety Equipment: Fire-rated housings for public infrastructure.
Features & Benefits
Superior Flame Resistance
UL 94 V-0/1.5mm and 5VA/3.0mm certification ensures critical fire safety for electrical components, reducing compliance risks in high-risk environments like power systems.
Enhanced Mechanical Strength
20% glass fiber reinforcement boosts tensile strength (86 MPa) and stiffness (5800 MPa), perfect for load-bearing parts like automotive housings or industrial gears needing durability.
Optimized Processing Efficiency
High viscosity (MVR 5.0 cm³/10 min) and easy-release properties streamline injection molding and extrusion, cutting cycle times and lowering production costs.
FAQs
Not stated in the supplied ISO TDS/SDS. A halogen-free/RoHS report is required. The SDS lists 0.1–1% Potassium perfluorobutane sulfonate, so PFAS-free cannot be assumed without a specific declaration.
Typical values only; not a specification.
ISO TDS lists V-0 @ 1.5 mm, V-2 @ 0.5 mm, 5VA @ 3.0 mm; opaque only. Verify exact colors and thickness on the current UL Yellow Card.
20% glass fiber reinforced flame-retardant PC, high viscosity, UL94 5VA, opaque only, suitable for injection molding and extrusion. Good low-temperature Charpy impact data is listed in the ISO TDS.
UV stabilized: No. UL 746C f1: Not available in ISO TDS; request UL Yellow Card.
Makrolon® 9425 Related Flame Retardant Grades
Disclaimer: Grades below are potential alternatives for comparison only. Not direct drop-in replacements. Typical values from Covestro ISO TDS; verify UL94 colors/thickness on current UL Yellow Card. RoHS/REACH/halogen/PFAS status not confirmed unless report provided.
| Grade | Positioning | UL94 (ISO TDS) | MVR | HDT (1.80 MPa) | Notched Impact (23°C/3mm) | Color | UV / UL 746C f1 |
|---|---|---|---|---|---|---|---|
| 9415 | 10% GF; high viscosity; 5VA | V-0 @1.5mm; 5VA @3.0mm | 6.0 cm³/10min | 136°C | Charpy 10C; Izod 10C | Opaque | No / N/A |
| 9417 | 10% GF; UV; 5VA | V-0 @1.5mm; 5VA @3.0mm | 6.0 cm³/10min | 135°C | Charpy 10C; Izod 10C | Opaque | Yes / N/A |
| 9125 | 20% GF; medium viscosity | V-0 @1.5mm; V-2 @0.36mm | 8.0 cm³/10min | 138°C | Charpy 8C; Izod 8C | Opaque | No / N/A |
| GF9002 | 10% GF; low viscosity | V-0 @1.2mm; V-1 @0.75mm | 15 cm³/10min | 132°C | Charpy 8C | Opaque | No / N/A |
👉 Full Portfolio: Browse all 27+ grades on the Covestro Flame Retardant PC Resin Hub.