Covestro Makrolon® 1239 Polycarbonate, Blow Molding/Extrusion Grade

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Covestro Makrolon® 1239 Polycarbonate, Blow Molding/Extrusion Grade (discontinued **)
Categories:	Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate, Extruded
Material Notes:	Pseudoplastic behavior and high viscosity extrusion and injection molding grade, BgVV- and FDA grade for food contact applications, high melt stability, better resistance to hot water, specially suitable for extrusion blow molding. Information provided by Bayer. As of 1 September 2015, Bayer MaterialScience was separated from Bayer AG and has officially adopted its new name – Covestro. This product was discontinued prior to the separation.
Key Words:	PC
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Physical Properties	Metric	English	Comments

Density	1.20 g/cc	0.0434 lb/in³
Moisture Absorption at Equilibrium	0.15 %	0.15 %	50% RH
Water Absorption at Saturation	0.35 %	0.35 %
	0.35 %	0.35 %
Viscosity	800000 cP @Shear Rate 25 1/s, Temperature 320 °C	800000 cP @Shear Rate 25 1/s, Temperature 608 °F
Linear Mold Shrinkage	0.0060 - 0.0080 cm/cm	0.0060 - 0.0080 in/in	ASTM D955
Melt Flow	3.0 g/10 min @Load 1.20 kg, Temperature 300 °C	3.0 g/10 min @Load 2.65 lb, Temperature 572 °F

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell R	124	124	ASTM D785
Tensile Strength, Ultimate	69.0 MPa	10000 psi	ASTM D638
Tensile Strength, Yield	63.0 MPa	9140 psi
Elongation at Break	110 %	110 %	ASTM D638
Elongation at Yield	6.0 %	6.0 %
Tensile Modulus	2.40 GPa	348 ksi
Flexural Yield Strength	85.0 MPa	12300 psi	at 5% strain; ASTM D790
Flexural Modulus	2.30 GPa	334 ksi	ASTM D790
Izod Impact, Notched	9.10 J/cm @Thickness 3.20 mm	17.0 ft-lb/in @Thickness 0.126 in	ASTM D256
Charpy Impact Unnotched	NB	NB
Tensile Creep Modulus, 1 hour	2200 MPa	319000 psi
Tensile Creep Modulus, 1000 hours	1900 MPa	276000 psi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	>= 1.00e+15 ohm-cm	>= 1.00e+15 ohm-cm
Surface Resistance	1.00e+15 ohm	1.00e+15 ohm
Dielectric Constant	2.9 @Frequency 1e+6 Hz	2.9 @Frequency 1e+6 Hz
	3.0 @Frequency 100 Hz	3.0 @Frequency 100 Hz
Dielectric Strength	30.0 kV/mm	762 kV/in
Dissipation Factor	0.0010 @Frequency 100 Hz	0.0010 @Frequency 100 Hz
	0.010 @Frequency 1e+6 Hz	0.010 @Frequency 1e+6 Hz
Arc Resistance	120 sec	120 sec	Tungsten Electrodes; ASTM D495
Comparative Tracking Index	275 V	275 V

Thermal Properties	Metric	English	Comments
CTE, linear, Parallel to Flow	70.0 µm/m-°C @Temperature 20.0 °C	38.9 µin/in-°F @Temperature 68.0 °F
CTE, linear, Transverse to Flow	70.0 µm/m-°C @Temperature 20.0 °C	38.9 µin/in-°F @Temperature 68.0 °F
Specific Heat Capacity	1.17 J/g-°C	0.280 BTU/lb-°F	ASTM D2766
Thermal Conductivity	0.200 W/m-K	1.39 BTU-in/hr-ft²-°F	ASTM C177
Deflection Temperature at 0.46 MPa (66 psi)	138 °C	280 °F
Deflection Temperature at 1.8 MPa (264 psi)	130 °C	266 °F
Vicat Softening Point	147 °C	297 °F
Glass Transition Temp, Tg	148 °C	298 °F
UL RTI, Electrical	75.0 °C	167 °F
UL RTI, Mechanical with Impact	75.0 °C	167 °F
UL RTI, Mechanical without Impact	75.0 °C	167 °F
Oxygen Index	26 %	26 %

Optical Properties	Metric	English	Comments
Refractive Index	1.586	1.586
Haze	1.0 % @Thickness 3.17 mm	1.0 % @Thickness 0.125 in	ASTM D1003
Transmission, Visible	87 % @Thickness 3.20 mm	87 % @Thickness 0.126 in	ASTM D1003

Processing Properties	Metric	English	Comments
Melt Temperature	280 - 320 °C	536 - 608 °F

**
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