Covestro Makrolon® 2456 PC Resin
Plastic Granules
Makrolon 2456 Polycarbonate Granules
Covestro Makrolon® 2456 is a low-viscosity, food-contact-compliant polycarbonate resin ideal for injection molding. With an MVR of 19 cm³/10 min (300°C/1.2 kg), it offers easy flow, excellent release, and comes in transparent/opaque colors.
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt volume-flow rate: 19 cm³/10 min (300 °C/1.2 kg, ISO 1133)
- Melt mass-flow rate: 20 g/10 min (300 °C/1.2 kg, ISO 1133)
- Molding shrinkage, parallel: 0.65% (60x60x2 mm³/500 bar, ISO 294-4)
- Molding shrinkage, normal: 0.70% (60x60x2 mm³/500 bar, ISO 294-4)
Mechanical Properties (23 °C/50% r.h.)
- Tensile modulus: 2400 MPa (1 mm/min, ISO 527-1/-2)
- Yield stress: 65 MPa (50 mm/min, ISO 527-1/-2)
- Yield strain: 6.2% (50 mm/min, ISO 527-1/-2)
- Nominal strain at break: > 50% (50 mm/min, ISO 527-1/-2)
- Flexural modulus: 2350 MPa (2 mm/min, ISO 178)
- Flexural strength: 97 MPa (2 mm/min, ISO 178)
- Charpy notched impact strength:
- 65 kJ/m² (23 °C, 3 mm, ISO 21305/ISO 179/1eA)
- 14 kJ/m² (-30 °C, 3 mm, ISO 21305/ISO 179/1eA)
- Izod notched impact strength:
- 65 kJ/m² (23 °C, 3 mm, ISO 21305/ISO 180/A)
- 15 kJ/m² (-30 °C, 3 mm, ISO 21305/ISO 180/A)
Thermal Properties
- Glass transition temperature: 146 °C (10 °C/min, ISO 11357-1/-2)
- Temperature of deflection under load:
- 125 °C (1.80 MPa, ISO 75-1/-2)
- 138 °C (0.45 MPa, ISO 75-1/-2)
- Vicat softening temperature:
- 145 °C (50 N; 50 °C/h, ISO 306)
- 146 °C (50 N; 120 °C/h, ISO 306)
- Coefficient of linear thermal expansion: 0.65×10⁻⁴/K (23–55 °C, ISO 11359-1/-2)
- Burning behavior:
- UL 94 V-2 (0.75 mm, UL 94)
- UL 94 HB (2.7 mm, UL 94)
Electrical Properties (23 °C/50% r.h.)
- Relative permittivity:
- 3.1 (100 Hz, IEC 60250)
- 3.0 (1 MHz, IEC 60250)
- Dissipation factor:
- 0.0005 (100 Hz, IEC 60250)
- 0.0090 (1 MHz, IEC 60250)
- Volume resistivity: 1×10141 \times 10^{14} Ohm·m (IEC 62631-3-1)
- Surface resistivity: 1×10161 \times 10^{16} Ohm (IEC 62631-3-2)
- Electrical strength: 34 kV/mm (1 mm, IEC 60243-1)
Other Properties (23 °C)
- Density: 1200 kg/m³ (ISO 1183-1)
- Water absorption (saturation value): 0.30% (Water, 23 °C, ISO 62)
- Luminous transmittance (clear transparent materials):
- 89% (1 mm, ISO 13468-2)
- 88% (3 mm, ISO 13468-2)
Processing and Drying Conditions
- Melt temperature (recommended): 280–320 °C
- Mold temperature (recommended): 80–120 °C
- Drying temperature: 120 °C
- Drying time: 2–3 hours
- Moisture content (max): ≤ 0.02%
Features & Benefits
Optimized for Efficient Molding
Makrolon 2456’s low viscosity ensures fast, smooth filling of complex molds, reducing cycle times and energy costs. Ideal for high-volume production of intricate parts.
Certified Food-Safe Performance
It meets stringent food-contact standards, resisting stains and odors. Perfect for reusable containers, kitchenware, and packaging that demand safety and clarity.
Exceptional Clarity & Durability
It delivers 89% light transmission (1mm thickness) with minimal haze (<0.8%). Withstands impacts and temperatures from -30°C to 125°C, ensuring longevity.
Use & Applications
- Food Packaging: Transparent clamshells, microwave-safe containers, reusable cups.
- Consumer Goods: Kitchen utensils, coffee machine components, appliance housings.
- Industrial Parts: Shatter-resistant sight glasses, covers, and electrical enclosures.
- Medical Accessories: Non-implant labware, specimen containers (verify regional compliance).
