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Makroblend® KU2-7912/4

(PC+PBT) blend; impact modified; high toughness at low temperatures; unreinforced

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About

Product Types

  • PC+PBT

Material

Plastics
Impact resistant, Chemical resistant

General Characterization

No data available

Storage Conditions

No data available

Sampling

No data available

Packaging Type

No data available

Technical Properties & Datasheets

Applications

Injection molding; Ideal for painted applications

Typical Values

Rheological properties

Property Test Condition Value Unit Standard
Melt Volume-flow Rate (MVR) 260 °C/ 5 kg 16 cm³/10 min ISO 1133-1
Molding Shrinkage, parallel / normal Value range based on general practical experience (600bar) 0.7 - 0.9 % b.o. ISO 2577
Göttfert Melt Viscosity 165 s^-1^/ 260 °C 670 Pa·s Bayer test

Mechanical properties (23 °C/50 % r. h.)

Property Test Condition Value Unit Standard
Tensile modulus 1 mm/min 2,050 MPa ISO 527-1,-2
Yield Stress 50 mm/min 50 MPa ISO 527-1,-2
Yield Strain 50 mm/min 4 % ISO 527-1,-2
Nominal Strain at Break 50 mm/min > 50 % ISO 527-1,-2
Stress at Break 50 mm/min 45 MPa ISO 527-1,-2
Flexural Modulus 2 mm/min 2,100 MPa ISO 178
Flexural Strength 2 mm/min 75 MPa ISO 178
Flexural Strain at Flexural Strength 2 mm/min 5.5 % ISO 178
Flexural Stress at 3.5 % Flexural Strain 2 mm/min 66 MPa ISO 178
Izod Notched Impact Strength - 20°C / 4 mm 60 kJ/m² ISO 180/A
Izod Notched Impact Strength 23 °C 60 kJ/m² ISO 180/A
Izod Notched Impact Strength -20 °C 52 kJ/m² ISO 180/A
Izod Notched Impact Strength -30 °C 45 kJ/m² ISO 180/A
Charpy Notched Impact Strength -30 °C 45 kJ/m² ISO 179/1eA
Charpy Notched Impact Strength 23 °C 60 kJ/m² ISO 179/1eA
Ball Indentation Hardness 100 N/mm² ISO 2039-1

Thermal properties

Property Test Condition Value Unit Standard
Temperature of Deflection under Load 0.45 MPa 106 °C ISO 75-1,-2
Temperature of Deflection under Load 1.80 MPa 82 °C ISO 75-1,-2
Vicat Softening Temperature 50 N; 120 °C/h 120 °C ISO 306
Coefficient of Linear Thermal Expansion, parallel 23 to 55 °C 0.9 10⁻⁴/K ISO 11359-1,-2
Coefficient of Linear Thermal Expansion, normal 23 to 55 °C 0.9 10⁻⁴/K ISO 11359-1,-2
Burning Behavior 1.6 mm HB UL 94
Burning Rate (US-FMVSS-302) >=1.0 mm PASSED ISO 3795
Oxygen Index Method A 21 % ISO 4589-2
Thermal Conductivity, through-plane 23 °C; 50 % r. h. 0.2 W/(m·K) ISO 8302
Glow Wire Test (GWFI) 2.0 mm 700 °C IEC 60695-2-12
Melting Temperature 10 °C/min 223 °C ISO 11357-1,-3

Electrical properties (23 °C/50 % r. h.)

Property Test Condition Value Unit Standard
Relative Permittivity 1 MHz 3.1 IEC 60250
Relative Permittivity 100 Hz 3.2 IEC 60250
Dielectric Dissipation Factor 1 MHz 130 10⁻⁴ IEC 60250
Dielectric Dissipation Factor 100 Hz 15 10⁻⁴ IEC 60250
Volume Resistivity > 1E15 Ω·m IEC 60093
Volume Resistivity > 1E15 Ω·m IEC 62631-3-1
Surface Resistivity > 1E17 IEC 60093
Surface Resistivity > 1E17 IEC 62631-3-2
Electric Strength 1 mm 35 kV/mm IEC 60243-1
Comparative Tracking Index (CTI) Solution A 500 IEC 60112
Comparative Tracking Index (CTI M) Solution B 100 IEC 60112
Electrolytic Corrosion A1 IEC 60426

Other properties (23 °C)

Property Test Condition Value Unit Standard
Water Absorption (Saturation Value) Water at 23 °C 0.6 % ISO 62
Water Absorption (Equilibrium Value) 23 °C; 50 % r. h. 0.2 % ISO 62
Density 1,200 kg/m³ ISO 1183-1
Bulk Density 0.7 g/cm³ ISO 60

Processing conditions for test specimens

Property Test Condition Value Unit Standard
Injection Molding - Melt Temperature 260 °C ISO 294
Injection Molding - Mold Temperature 70 °C ISO 294
Injection Molding - Injection Velocity 200 mm/s ISO 294

Recommended processing and drying conditions

Property Test Condition Value Unit Standard
Standard Melt Temperature 260 °C
Barrel Temperatures Nozzle 260 - 270 °C
Barrel Temperatures Front 250 - 260 °C
Barrel Temperatures Middle 240 - 250 °C
Barrel Temperatures Rear 230 - 240 °C
Mold Temperatures 60 - 80 °C
Hold Pressure (% of Injection Pressure) 50 - 75 %
Plastic Back Pressure (specific) 50 - 100 bar
Peripheral Screw Speed 0.1 - 0.2 m/s
Shot-to-Cylinder Size 30 - 70 %
Dry Air Drying Temperature 105 °C
Dry Air Drying Time 2 - 4 h
Moisture Content max. (%) ≤ 0.02 %
Vent Depth 0.025 - 0.075 mm

Downloads

Technical Data Sheet
Download
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com
Download
Viskosität Schergeschwindigkeit Makroblend® KU2-7912/4 (Multipoint Data Sheet)
Secant modulus - Strain Makroblend® KU2-7912/4 (Multipoint Data Sheet)
Viscosity Shear Rate Makroblend® KU2-7912/4 (Multipoint Data Sheet)
Spannung-Dehnung Makroblend® KU2-7912/4 (Multipoint Data Sheet)
Specific Volume-Temperature (pvT) Makroblend® KU2-7912/4 (Multipoint Data Sheet)
Spezifisches Volumen-Temperatur (pvT) Makroblend® KU2-7912/4 (Multipoint Data Sheet)
Sekantenmodul-Dehnung Makroblend® KU2-7912/4 (Multipoint Data Sheet)
Stress-Strain Makroblend® KU2-7912/4 (Multipoint Data Sheet)

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