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Hexion Bakelite™ EP 8412 Epoxy Resin, High Arc Resistance, Improved Electrical Properties, Low Shrinkage

Category Polymer , Thermoset , Epoxy , Epoxy Molding Compound , Filled/Reinforced Thermoset
Manufacturer Hexion
Trade Name Bakelite™
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Hexion Bakelite™ EP 8412 Epoxy Resin, High Arc Resistance, Improved Electrical Properties, Low Shrinkage.pdf
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Material Notes:
Epoxy molding compound, inorganically filled, glass fiber reinforced, heat resistant, dimensionally stable, good electrical and mechanical properties, very good chemical resistance, low viscosity, UL listed (RTI 155°C).Application areas: Encapsulation of electric parts, e.g. electromagnetic coil.Information provided by Bak AGThis product was origianlly produced by Bak AG, now a part of Hexion.
Physical Properties Metric English Comments
Density 1.85 g/cc
0.0668 lb/in³
ISO 1183
Apparent Bulk Density 0.800 g/cc
0.0289 lb/in³
ISO 60
Linear Mold Shrinkage, Flow 0.0010 cm/cm
0.0010 in/in
Compression molding; ISO 2577
Mechanical Properties Metric English Comments
Ball Indentation Hardness 400 MPa
58000 psi
H 961/30; ISO 2039/P1
Tensile Strength at Break 55.0 MPa
7980 psi
5 mm/min; ISO 527 - 1/2
Tensile Modulus 13.0 GPa
1890 ksi
1 mm/min; ISO 527 - 1/2
Flexural Strength 125 MPa
18100 psi
2 mm/min; ISO 178
Flexural Modulus 14.5 GPa
2100 ksi
ISO 178
Compressive Strength 170 MPa
24700 psi
Test specimen flat tested; ISO 604
Charpy Impact Unnotched 0.850 J/cm²

@Temperature 23.0 °C
4.05 ft-lb/in²

@Temperature 73.4 °F
ISO 179-1/2 eU
Charpy Impact, Notched 0.350 J/cm²

@Temperature 23.0 °C
1.67 ft-lb/in²

@Temperature 73.4 °F
ISO 179-1/2 eA
Thermal Properties Metric English Comments
Maximum Service Temperature, Air 180 °C
356 °F
<20000 hours; IEC 60216-P1
220 °C
428 °F
< 50 hours; IEC 60216-P1
Deflection Temperature at 8.0 MPa 115 °C
239 °F
ISO 75-2
UL RTI, Electrical 155 °C

@Thickness 1.50 mm
311 °F

@Thickness 0.0591 in
BK
UL RTI, Mechanical with Impact 155 °C

@Thickness 1.50 mm
311 °F

@Thickness 0.0591 in
BK
UL RTI, Mechanical without Impact 155 °C

@Thickness 1.50 mm
311 °F

@Thickness 0.0591 in
BK
Flammability, UL94 HB

@Thickness 1.50 mm
HB

@Thickness 0.0591 in
BK
Shrinkage 0.000 %

@Temperature 110 °C,
Time 605000 sec
0.000 %

@Temperature 230 °F,
Time 168 hour
Compression molding; ISO 2577
Electrical Properties Metric English Comments
Volume Resistivity 1.00e+13 ohm-cm
1.00e+13 ohm-cm
IEC 60093
Surface Resistance 1.00e+12 ohm
1.00e+12 ohm
IEC 60093
Dielectric Constant 5.0

@Frequency 100 Hz
5.0

@Frequency 100 Hz
IEC 60250
Dielectric Strength 30.0 kV/mm

@Thickness 1.00 mm
762 kV/in

@Thickness 0.0394 in
IEC 60243-P1
Dissipation Factor 0.020

@Frequency 100 Hz
0.020

@Frequency 100 Hz
IEC 60250
Arc Resistance 192 - 194 sec
192 - 194 sec
ASTM D495
High Voltage Arc Resistance to Ignition (HVAR) >= 300 sec

@Thickness 1.50 mm
>= 300 sec

@Thickness 0.0591 in
BK
Comparative Tracking Index 250 V
250 V
Test liquid A; IEC 60112
Hot Wire Ignition, HWI 60 - 120 sec

@Thickness 1.50 mm
60 - 120 sec

@Thickness 0.0591 in
BK
>= 120 sec

@Thickness 3.00 mm
>= 120 sec

@Thickness 0.118 in
BK
High Amp Arc Ignition, HAI 15 - 30 arcs

@Thickness 1.50 mm
15 - 30 arcs

@Thickness 0.0591 in
BK
60 - 120 arcs

@Thickness 3.00 mm
60 - 120 arcs

@Thickness 0.118 in
BK
High Voltage Arc-Tracking Rate, HVTR 0.000 - 10.0 mm/min

@Thickness 3.00 mm
0.000 - 0.394 in/min

@Thickness 0.118 in
BK
Processing Properties Metric English Comments
Feed Temperature 60.0 - 75.0 °C
140 - 167 °F
Injection molding
Nozzle Temperature 70.0 - 100 °C
158 - 212 °F
Injection molding
Melt Temperature 90.0 - 100 °C
194 - 212 °F
Injection molding
Mold Temperature 160 - 190 °C
320 - 374 °F
Compression molding
170 - 190 °C
338 - 374 °F
Injection molding
Injection Pressure >= 10.0 MPa
>= 1450 psi
Compression and injection cavity mold pressure
Back Pressure 0.500 - 2.00 MPa
72.5 - 290 psi
Injection molding
Cure Time 0.250 - 0.417 min
0.00417 - 0.00694 hour
Per 1 mm of wall thickness, injection molding
0.500 - 1.00 min
0.00833 - 0.0167 hour
Per 1 mm of wall thickness, compression molding
Descriptive Properties Value Comments
Chromatic Spectrum Subdued Colors
Creep Rupture Strength Very Good
Holding Pressure Approximately 40-60% of injection pressure
Media Resistance Very Good
Moisture Absorption 10 mg
ISO 62, 24 hours at 23°C
Reserves by Peak Temperature Very High
Thermal Expansion Very Slight
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