Covestro Makrolon® LED2045 PC Resin
Plastic Granules
Makrolon LED2045 Polycarbonate Granules Optical Grade
Covestro Makrolon LED2045 is an optically clear polycarbonate resin engineered for precision light guides. With high melt flow (17 cm³/10min), exceptional transparency (>90% transmittance), and low viscosity, it enables easy molding of complex optical components while ensuring consistent color purity (available only in crystal-clear 000000 grade).
Associated Documents
ISO TDS
Typical property data
Physical Properties (Rheological)
- Melt Volume-Flow Rate (250 °C/2.16 kg): 17.0 cm³/10 min (ISO 1133)
- Melt Volume-Flow Rate (300 °C/1.2 kg): 61 cm³/10 min (ISO 1133)
- Molding Shrinkage (Parallel, 60x60x2 mm³/500 bar): 0.6% (ISO 294-4)
- Molding Shrinkage (Normal, 60x60x2 mm³/500 bar): 0.65% (ISO 294-4)
Mechanical Properties (23 °C/50 % r. h.)
- Tensile Modulus (1 mm/min): 2350 MPa (ISO 527-1,-2)
- Yield Stress (50 mm/min): 63 MPa (ISO 527-1,-2)
- Yield Strain (50 mm/min): 6.0% (ISO 527-1,-2)
- Nominal Strain at Break (50 mm/min): > 50% (ISO 527-1,-2)
- Flexural Modulus (2 mm/min): 2350 MPa (ISO 178)
- Flexural Strength (2 mm/min): 97 MPa (ISO 178)
- Charpy Notched Impact Strength (23 °C, 3 mm): 50 kJ/m² (ISO 21305/based on ISO 179/1eA)
- Charpy Notched Impact Strength (-30 °C, 3 mm): 12 kJ/m² (ISO 21305/based on ISO 179/1eA)
Thermal Properties
- Glass Transition Temperature: 144 °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): 145 °C (ISO 306)
- Coefficient of Linear Thermal Expansion (Parallel, 23–55 °C): 0.65 × 10⁻⁴/K (ISO 11359-1,-2)
- Burning Behavior (0.71 mm): UL 94 V-2 (UL 94)
- Oxygen Index: 27% (ISO 4589-2)
- Thermal Conductivity (Through-Plane, 23 °C; 50 % r. h.): 0.20 W/(m·K) (ISO 8302)
Electrical Properties (23 °C/50 % r. h.)
- Relative Permittivity (100 Hz): 3.1 (IEC 60250)
- Relative Permittivity (1 MHz): 3.0 (IEC 60250)
- Dissipation Factor (100 Hz): 5 × 10⁻⁴ (IEC 60250)
- Dissipation Factor (1 MHz): 90 × 10⁻⁴ (IEC 60250)
- Volume Resistivity: 1E14 Ohm·m (IEC 62631-3-1)
- Surface Resistivity: 1E16 Ohm (IEC 62631-3-2)
- Electrical Strength (1 mm): 34 kV/mm (IEC 60243-1)
- Comparative Tracking Index (CTI Solution A): 225 (IEC 60112)
Other Properties (23 °C)
- Density: 1190 kg/m³ (ISO 1183-1)
- Water Absorption (Saturation Value, Water at 23 °C): 0.30% (ISO 62)
- Water Absorption (Equilibrium Value, 23 °C; 50 % r. h.): 0.12% (ISO 62)
- Refractive Index: 1.584 (ISO 489)
- Luminous Transmittance (Clear Transparent, 1 mm): 90% (ISO 13468-2)
- Haze (Transparent Materials, 3 mm): < 0.5% (ISO 14782)
Processing and Drying Conditions
- Melt Temperature (Injection Molding): 260–300 °C (ISO 294)
- Mold Temperature (Injection Molding): 80 °C (ISO 294)
- Injection Velocity: 200 mm/s (ISO 294)
- Dry Air Drying Temperature: 120 °C
- Dry Air Drying Time: 2–3 hours
- Moisture Content (Max): ≤ 0.02%
Features & Benefits
Ultra-High Light Transmission
It delivers >90% luminous transmittance at 1-4mm thickness with near-zero haze (<0.5%), maximizing brightness efficiency in LED applications while reducing energy costs.
Effortless Injection Molding
Low viscosity (MVR 61 cm³/10min at 300°C) ensures smooth flow into intricate molds, shortening cycle times and minimizing sink marks for high-volume production.
Thermal & Impact Resilience
It withstands 124°C under load (1.8 MPa) and features 50 kJ/m² notched impact strength, preventing cracking in demanding environments like automotive lighting.
Use & Applications
- LED Light Guides: Edge-lit panels, automotive taillights, and backlit displays requiring uniform diffusion.
- Optical Lenses: Thin-walled lenses for sensors and consumer electronics.
- Transparent Housings: Protective covers for indicators and control panels.
- Precision Components: Medical device light pipes and touch-screen interfaces.