Covestro Makrolon® 6485 PC Resin
Makrolon 6485 PC Resin Flame Retardant
Covestro Makrolon® 6485 is a flame-retardant, medium-viscosity polycarbonate resin engineered for demanding industrial applications. With UL 94 V-0 (1.5 mm) and 5VA (3.0 mm) certifications, easy-release properties, and opaque color options, it ensures safety and efficiency in injection molding (280–320°C melt temps).
Plastic Granules
Typical property data
Physical Properties (Rheological)
- Melt volume-flow rate (300 °C/1.2 kg): 9 cm³/10 min (ISO 1133)
- Melt mass-flow rate (300 °C/1.2 kg): 10 g/10 min (ISO 1133)
- Molding shrinkage, parallel (60x60x2 mm³/500 bar): 0.65% (ISO 294-4)
- Molding shrinkage, normal (60x60x2 mm³/500 bar): 0.7% (ISO 294-4)
- Molding shrinkage range (parallel/normal): 0.6−0.8% (ISO 2577)
Mechanical Properties (23 °C/50 % r. h.)
- Tensile modulus (1 mm/min): 2400 MPa (ISO 527-1,-2)
- Yield stress (50 mm/min): 66 MPa (ISO 527-1,-2)
- Yield strain (50 mm/min): 6.1% (ISO 527-1,-2)
- Nominal strain at break (50 mm/min): >50% (ISO 527-1,-2)
- Tensile creep modulus (1 h): 2200 MPa (ISO 899-1)
- Tensile creep modulus (1000 h): 1900 MPa (ISO 899-1)
- Flexural modulus (2 mm/min): 2400 MPa (ISO 178)
- Flexural strength (2 mm/min): 98 MPa (ISO 178)
- Charpy notched impact strength (23 °C/3 mm): 70 kJ/m² (ISO 21305/ISO 179/1eA)
- Charpy notched impact strength (-30 °C/3 mm): 14 kJ/m² (ISO 21305/ISO 179/1eA)
Thermal Properties
- Glass transition temperature (10 °C/min): 142 °C (ISO 11357-1,-2)
- Temperature of deflection under load (1.80 MPa): 124 °C (ISO 75-1,-2)
- Vicat softening temperature (50 N, 50 °C/h): 144 °C (ISO 306)
- Burning behavior (1.5 mm): UL 94 V-0
- Burning behavior (3.0 mm): UL 94 5VA
- Oxygen index: 36% (ISO 4589-2)
Electrical Properties (23 °C/50 % r. h.)
- Relative permittivity (100 Hz): 3.1 (IEC 60250)
- Relative permittivity (1 MHz): 3.0 (IEC 60250)
- Electrical strength (1 mm): 34 kV/mm (IEC 60243-1)
Other Properties (23 °C)
- Water absorption (saturation value, 23 °C): 0.30% (ISO 62)
- Water absorption (equilibrium value, 50 % r. h.): 0.12% (ISO 62)
- Density: 1200 kg/m³ (ISO 1183-1)
Processing and Drying Conditions
- Melt temperature (injection molding): 280−320 °C
- Mold temperature (injection molding): 80−120 °C
- Drying temperature (dry air): 120 °C
- Drying time (dry air): 2−3 h
- Moisture content (max): ≤0.02%
Use & Applications
- Electrical Enclosures: Flame-retardant housings for switches, circuit breakers, and power distribution units.
- Automotive Components: Sensor casings, connectors, and under-hood parts requiring heat/impact resistance.
- Consumer Electronics: Charger bodies, power tool housings, and appliance guards.
- Industrial Safety: Control panels, machinery covers, and fire-rated equipment parts.
Features & Benefits
Reliable Flame Resistance
Makrolon 6485 delivers UL 94 V-0/5VA ratings, critical for electronics and automotive parts exposed to high heat or electrical risks, ensuring compliance without secondary treatments.
Optimized Processing Efficiency
Medium viscosity (9.0 cm³/10 min MVR) and easy-release properties reduce cycle times and mold fouling, cutting production costs for complex components like connectors or housings.
Tough Mechanical Performance
High impact strength (>50% nominal strain) and dimensional stability (0.6–0.8% shrinkage) guarantee durable parts that withstand drops, vibrations, and thermal shifts in harsh environments.
Makrolon® 6485 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 |
|---|---|---|---|---|---|---|---|
| 6487 | Medium viscosity; 5VA; UV | V-0 @1.5mm; 5VA @3.0mm | 9.0 cm³/10min | 122°C | Charpy 70P(C); Izod 70P(C) | Opaque | Yes / N/A |
| 6487 RE | Bio-circular (ISCC PLUS); 5VA; UV | V-0 @1.5mm; 5VA @3.0mm | 9.0 cm³/10min | 122°C | Charpy 70P(C); Izod 70P(C) | Opaque | Yes / N/A |
| 9415 | 10% GF; 5VA; high viscosity | V-0 @1.5mm; 5VA @3.0mm | 6.0 cm³/10min | 136°C | Charpy 10C; Izod 10C | Opaque | No / N/A |
| 6265 X | Low viscosity; opaque | V-0 @1.5mm | 19 cm³/10min | 124°C | Charpy 65P(C); Izod 50P(C) | Opaque | No / N/A |
👉 Full Portfolio: Browse all 27+ grades on the Covestro Flame Retardant PC Resin Hub.