Covestro Makroblend® KU 2-7912 Polycarbonate + PBT, Impact Grade

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Covestro Makroblend® KU 2-7912 Polycarbonate + PBT, Impact Grade
Categories:	Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate/Polybutylene Terephthalate (PBT) Blend, Unreinforced; Polyester, TP; Polybutylene Terephthalate (PBT)
Material Notes:	(PC+PBT)-blend, impact modified, Injection molding grade, medium flow, high toughness at low temperatures, ideal for painted application, unreinforced As of 1 September 2015, Bayer MaterialScience was separated from Bayer AG and officially adopted its new name – Covestro.
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Physical Properties	Metric	English	Comments

Bulk Density	0.700 g/cc	0.0253 lb/in³	ISO 60
Density	1.20 g/cc	0.0434 lb/in³	ISO 1183
Moisture Absorption at Equilibrium	0.20 %	0.20 %	ISO 62
Water Absorption at Saturation	0.50 %	0.50 %	ISO 62
Viscosity	570 cP @Frequency 165 Hz, Temperature 260 °C	570 cP @Frequency 165 Hz, Temperature 500 °F	Gottfert melt; Bayer
Linear Mold Shrinkage, Flow	0.0010 - 0.0020 cm/cm	0.0010 - 0.0020 in/in	post; b.o. ISO 2577
	0.0070 - 0.0090 cm/cm	0.0070 - 0.0090 in/in	b.o. ISO 2577
Melt Flow	25 g/10 min @Load 5.00 kg, Temperature 260 °C	25 g/10 min @Load 11.0 lb, Temperature 500 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Ball Indentation Hardness	100 MPa	14500 psi	ISO 2039-1
Tensile Strength at Break	40.0 MPa	5800 psi	50 mm/min; ISO 527-1/-2
Tensile Strength, Yield	50.0 MPa	7250 psi	50 mm/min; ISO 527-1/-2
Elongation at Break	>= 50 %	>= 50 %	Nominal, 50 mm/min; ISO 527-1/-2
Elongation at Yield	4.0 %	4.0 %	50 mm/min; ISO 527-1/-2
	5.6 %	5.6 %	2 mm/min; ISO 178
Tensile Modulus	2.10 GPa	305 ksi	1 mm/min; ISO 527-1/-2
Flexural Strength	80.0 MPa	11600 psi	2 mm/min; ISO 178
Flexural Yield Strength	70.0 MPa @Strain 3.5 %	10200 psi @Strain 3.5 %	2 mm/min; ISO 178
Flexural Modulus	2.00 GPa	290 ksi	2 mm/min; ISO 178
Izod Impact, Notched (ISO)	45.0 kJ/m² @Temperature -30.0 °C	21.4 ft-lb/in² @Temperature -22.0 °F	ISO 180-A
	51.0 kJ/m² @Temperature -20.0 °C	24.3 ft-lb/in² @Temperature -4.00 °F	ISO 180-A
	60.0 kJ/m² @Temperature 23.0 °C	28.6 ft-lb/in² @Temperature 73.4 °F	ISO 180-A
Izod Impact, Unnotched (ISO)	NB @Temperature 23.0 °C	NB @Temperature 73.4 °F	ISO 180-U
	NB @Temperature -30.0 °C	NB @Temperature -22.0 °F	ISO 180-U
Charpy Impact Unnotched	NB	NB	ISO 179/1eU
	NB @Temperature -30.0 °C	NB @Temperature -22.0 °F	ISO 179/1eU
Charpy Impact, Notched	6.00 J/cm²	28.6 ft-lb/in²	ISO 179/1eA
	4.50 J/cm² @Temperature -30.0 °C	21.4 ft-lb/in² @Temperature -22.0 °F	ISO 179/1eA

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 1.00e+15 ohm-cm	>= 1.00e+15 ohm-cm	IEC 60093
Surface Resistance	>= 1.00e+17 ohm	>= 1.00e+17 ohm	IEC 60093
Dielectric Constant	3.1 @Frequency 1e+6 Hz	3.1 @Frequency 1e+6 Hz	IEC 60250
	3.2 @Frequency 100 Hz	3.2 @Frequency 100 Hz	IEC 60250
Dielectric Strength	31.0 kV/mm	787 kV/in	1 mm; IEC 60243-1
Dissipation Factor	0.0010 @Frequency 100 Hz	0.0010 @Frequency 100 Hz	IEC 60250
	0.0125 @Frequency 1e+6 Hz	0.0125 @Frequency 1e+6 Hz	IEC 60250
Comparative Tracking Index	125 V	125 V	CTI M; Solution B; IEC 60112
	600 V	600 V	Solution A; IEC 60112

Thermal Properties	Metric	English	Comments
CTE, linear, Parallel to Flow	90.0 µm/m-°C @Temperature 23.0 - 55.0 °C	50.0 µin/in-°F @Temperature 73.4 - 131 °F	ISO 11359-1/-2
CTE, linear, Transverse to Flow	90.0 µm/m-°C @Temperature 23.0 - 55.0 °C	50.0 µin/in-°F @Temperature 73.4 - 131 °F	ISO 11359-1/-2
Thermal Conductivity	0.200 W/m-K	1.39 BTU-in/hr-ft²-°F	cross-flow; ISO 8302
Melting Point	223 °C	433 °F	ISO 11357-1/-3
Deflection Temperature at 0.46 MPa (66 psi)	100 °C	212 °F	ISO 75-1/-2
Deflection Temperature at 1.8 MPa (264 psi)	84.0 °C	183 °F	ISO 75-1/-2
Vicat Softening Point	120 °C @Load 0.0000510 kg	248 °F @Load 0.000110 lb	ISO 306
Flammability, UL94	HB @Thickness 1.60 mm	HB @Thickness 0.0630 in	IEC 60695-11-10
	HB @Thickness 0.800 mm	HB @Thickness 0.0315 in	IEC 60695-11-10
Oxygen Index	21 %	21 %	ISO 4589-1/-2
Glow Wire Flammability Index	750 °C @Thickness 50.8 mm	1380 °F @Thickness 2.00 in	IEC 60695-2-12

Processing Properties	Metric	English	Comments
Melt Temperature	260 °C	500 °F	Injection Molding; ISO 294
Mold Temperature	70.0 °C	158 °F	Injection Molding; ISO 294
Injection Velocity	200 mm/sec	7.87 in/sec	ISO 294

Descriptive Properties
Electrolytic corrosion	A1		IEC 60426

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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