Sabic LEXAN™ PC Resin OQ4820
SABIC Lexan OQ4820 Optical Grade
LEXAN™ OQ4820 resin is a polycarbonate with MVR 6. UV stabilized. Optical grade with UV cut-off up to 400 nm, greater optical purity than standard grades. Suitable for sunglass and sunvisor markets.
Associated Documents
TDS Europe
Typical property data
Physical Properties
- Mold Shrinkage on Tensile Bar, flow: 0.5 – 0.7% (SABIC method)
- Density: 1.2 g/cm³ (ISO 1183)
- Water Absorption (23°C/saturated): 0.35% (ISO 62-1)
- Moisture Absorption (23°C / 50% RH): 0.15% (ISO 62)
- Melt Volume Rate (MVR) at 300°C/1.2 kg: 6 cm³/10 min (ISO 1133)
Mechanical Properties
- Taber Abrasion, CS-17, 1 kg: 10 mg/1000 cycles (SABIC method)
- Tensile Stress, yield (50 mm/min): 63 MPa (ISO 527)
- Tensile Stress, break (50 mm/min): 70 MPa (ISO 527)
- Tensile Strain, yield (50 mm/min): 6% (ISO 527)
- Tensile Strain, break (50 mm/min): 120% (ISO 527)
- Tensile Modulus (1 mm/min): 2350 MPa (ISO 527)
- Flexural Stress, yield (2 mm/min): 90 MPa (ISO 178)
- Flexural Modulus (2 mm/min): 2300 MPa (ISO 178)
- Ball Indentation Hardness (H358/30): 95 MPa (ISO 2039-1)
Impact Properties
- Izod Impact, unnotched (+23°C): NB (No Break) (ISO 180/1U)
- Izod Impact, notched (+23°C): 70 kJ/m² (ISO 180/1A)
- Izod Impact, notched (-30°C): 12 kJ/m² (ISO 180/1A)
- Charpy Impact, V-notch (+23°C): 75 kJ/m² (ISO 179/1eA)
- Charpy Impact, V-notch (-30°C): 15 kJ/m² (ISO 179/1eA)
Thermal Properties
- Thermal Conductivity: 0.2 W/m-°C (ISO 8302)
- Coefficient of Thermal Expansion (CTE, 23°C to 80°C, flow): 7.E-05 1/°C (ISO 11359-2)
- Ball Pressure Test (125°C ± 2°C): Passes (IEC 60695-10-2)
- Vicat Softening Temperature (Rate B/50): 144°C (ISO 306)
- Vicat Softening Temperature (Rate B/120): 145°C (ISO 306)
- HDT/Be (0.45 MPa): 138°C (ISO 75/Be)
- HDT/Ae (1.8 MPa): 127°C (ISO 75/Ae)
Optical Properties
- Light Transmission (2.54 mm): 88 – 89% (ASTM D1003)
Flame Characteristics
- Glow Wire Flammability Index (850°C, passes at 1 mm): Passes (IEC 60695-2-12)
- Oxygen Index (LOI): 25% (ISO 4589)
Injection Molding
- Drying Temperature: 120°C
- Drying Time: 2 – 4 hours
- Maximum Moisture Content: 0.02%
- Melt Temperature: 290 – 320°C
- Nozzle Temperature: 280 – 310°C
- Front Zone 3 Temperature: 290 – 320°C
- Middle Zone 2 Temperature: 280 – 310°C
- Rear Zone 1 Temperature: 270 – 300°C
- Hopper Temperature: 60 – 80°C
- Mold Temperature: 80 – 120°C
Features & Benefits
Superior Clarity with UV Protectionu
This optical-grade OQ4820 resin delivers over 88% light transmission while blocking harmful UV rays up to 400 nm, ensuring long-term product clarity and user protection in sunlight-intensive applications.
Excellent Durability and Impact Resistance
With its high notched impact strength, components made from the Resin OQ4820 are tough and resistant to breakage, enhancing product lifespan and reliability for eyewear and visors.
High Heat Resistance
The material maintains dimensional stability and passes critical thermal tests like the Ball Pressure Test at 125°C, ensuring consistent performance and shape under elevated temperatures.
