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LEXAN™ Copolymer 4251R

1 of 148 products in this brand
SABIC's Specialties Business High heat polycarbonate copolymer blend with an excellent balance of heat resistance, processability, and impact strength. Available in a range of opaque colors. This product does not contain PFAS intentionally added during SHPP’s manufacturing process and are not expected to contain unintentional PFAS impurities. Each user is responsible for evaluating the presence of unintentional PFAS impurities.

Polymer Name: Polycarbonate (PC)

Additives Included: Heat Stabilizer, Mold Release Agent

Processing Methods: Injection Molding

Flexural Modulus: 2040.0 - 2040.0 MPa

Technical Data Sheet

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Identification & Functionality

Chemical Family
Polymer Name
Plastics & Elastomers Functions
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Features & Benefits

Labeling Claims

Applications & Uses

Plastics & Elastomers Processing Methods

Properties

Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Stress (Yield, Type I, 50 mm/min) ¹¹64MPaASTM D638
Tensile Stress (Break, Type I, 50 mm/min) ¹¹63MPaASTM D638
Tensile Strain (Yield, Type I, 50 mm/min) ¹¹6.7%ASTM D638
Tensile Strain (Break, Type I, 50 mm/min) ¹¹102%ASTM D638
Tensile Modulus (at 50 mm/min) ¹¹2180MPaASTM D638
Flexural Stress (Yield, 1.3 mm/min, 50 mm span) ¹¹101MPaASTM D790
Flexural Modulus (at 1.3 mm/min, 50 mm span) ¹¹2230MPaASTM D790
Tensile Stress (Yield, 50 mm/min) ¹¹62MPaISO 527
Tensile Stress (Break, 50 mm/min) ¹¹59MPaISO 527
Tensile Strain (Yield, 50 mm/min) ¹¹6.6%ISO 527
Tensile Strain (Break, 50 mm/min) ¹¹96.1%ISO 527
Tensile Modulus (at 1 mm/min) ¹¹2160MPaISO 527
Flexural Modulus (at 2 mm/min) ¹¹2040MPaISO 178
Physical Properties
ValueUnitsTest Method / Conditions
Specific Gravity ¹¹1.2ASTM D792
Mold Shrinkage (flow, 3.2 mm) ᶜ ¹¹0.6 - 0.8%SABIC method
Melt Flow Rate (at 300°C, 1.2 kgf) ¹¹5.6g/10 minASTM D1238
Density ¹¹1.1g/cm³ISO 1183
Water Absorption (at 23°C, saturated) ¹¹0.24%ISO 62-1
Moisture Absorption (at 23°C, 50% RH) ¹¹0.09%ISO 62
Melt Volume Rate (at 330°C, 2.16kg) ¹¹31cm³/10 minISO 1133
Thermal Properties
ValueUnitsTest Method / Conditions
Vicat Softening Temperature (Rate B/50) ¹¹156°CASTM D1525
Vicat Softening Temperature (Rate B/50) ¹¹155°CISO 306
Heat Deflection Temperature (at 1.82 MPa, 3.2mm, Unannealed) ¹¹136°CASTM D648
Coefficient of Thermal Expansion (at -40°C to 40°C, flow) ¹¹0.00006161/°CASTM E831
Coefficient of Thermal Expansion (at -40°C to 40°C, flow) ¹¹0.00006161/°CISO 11359-2
Coefficient of Thermal Expansion (at -40°C to 40°C, xflow) ¹¹0.00006731/°CASTM E831
Coefficient of Thermal Expansion (at -40°C to 40°C, xflow) ¹¹0.00006731/°CISO 11359-2
Vicat Softening Temperature (Rate B/120) ¹¹157°CISO 306
Heat Deflection Temperature/Af (at 1.8 Mpa, Flatw 80*10*4, sp=64mm) ¹¹134°CISO 75/Af
Impact Properties
ValueUnitsTest Method / Conditions
Izod Impact (Notched, at 23°C) ¹¹639J/mASTM D256
Izod Impact (Notched, at -30°C) ¹¹331J/mASTM D256
Instrumented Dart Impact Total Energy (at 23°C) ¹¹75JASTM D3763
Instrumented Dart Impact Total Energy (at -30°C) ¹¹78JASTM D3763
Izod Impact (Notched, 80*10*4, at 23°C) ¹¹43kJ/m²ISO 180/1A
Izod Impact (Notched, 80*10*4, at -30°C) ¹¹20kJ/m²ISO 180/1A
Charpy Impact (at 23°C, V-notch Edgew 80*10*4 sp=62mm) ¹¹48kJ/m²ISO 179/1eA
Injection Molding
ValueUnitsTest Method / Conditions
Drying Temperature ⁷120°C
Drying Time ⁷3 - 4Hrs
Drying Time (Cumulative) ⁷48Hrs
Maximum Moisture Content ⁷0.02%
Melt Temperature ⁷310 - 330°C
Nozzle Temperature ⁷305 - 325°C
Front - Zone 3 Temperature ⁷310 - 330°C
Middle - Zone 2 Temperature ⁷300 - 320°C
Rear - Zone 1 Temperature ⁷290 - 310°C
Mold Temperature ⁷80 - 115°C
Back Pressure ⁷0.3 - 0.7MPa
Screw Speed ⁷40 - 70rpm
Shot to Cylinder Size ⁷40 - 60%
Vent Depth ⁷0.025 - 0.076mm
Note
  • ᶜ Injection Molding parameters are only mentioned as general guidelines. These may not apply or may need adjustment in specific situations such as low shot sizes, large part molding, thin wall molding and gas-assist molding. Injection Molding parameters are only mentioned as general guidelines. These may not apply or may need adjustment in specific situations such as low shot sizes, large part molding, thin wall molding and gas-assist molding.
  • ⁷ Injection Molding parameters are only mentioned as general guidelines. These may not apply or may need adjustment in specific situations such as low shot sizes, large part molding, thin wall molding and gas-assist molding.
  • ¹¹ The information stated on Technical Datasheets should be used as indicative only for material selection purposes and not be utilized as specification or used for part or tool design.
 

Packaging & Availability

Regional Availability
  • Americas
  • North America