Technical Data Sheet
Black Flame Retardant Epoxy, Encapsulating & Potting Compound
Description
834FRB
potting and encapsulating compound
is a black, flame retardant, low viscosity two-part epoxy that
offers extreme environmental, mechanical and physical protection for printed circuit boards and electronic
assemblies.
This product is designed for applications where mechanical strength and self-extinguishing are required.
Due to its low mixed viscosity, it can easily penetrate small gaps and cavities. It also provides excellent
electrical insulation and protects components from static discharges, vibration, abrasion, thermal shock,
environmental humidity, salt water, fungus, and many harsh chemicals.
This epoxy has a convenient 2:1 volume mix ratio, making it compatible with most dispensing equipment.
834FRB can be cured at room temperature or higher.
834FRB
Features and Benefits
•
Certified UL 94V-0 (File #
E334302)
•
Compliant with UL 746A
•
Convenient 2A:1B volume mix ratio
•
Low mixed viscosity of 2 600 cP
•
Very high compressive and tensile strength
•
Excellent adhesion to a wide variety of substrates including metals, composites, glass, ceramics, and
many plastics
•
High Comparative Tracking Index (>600 V, PLC=0)
•
Excellent electrical insulating characteristics
•
Solvent-free
ISO 9001:2008 Registered Quality System. Burlington, Ontario, Canada SAI Global File: 004008
Date: 12 February 2018 / Ver. 3.00
Page 1
834FRB
Usage Parameters
Properties
Working life @22 °C [72 °F]
Shelf life
Full cure @22 °C [72 °F]
Full cure @65 °C [149 °F]
Full cure @80 °C [176 °F]
Full cure @100 °C [212 °F]
Value
1h
5y
24 h
1h
To be determined
To be determined
Temperature Ranges
Properties
Constant service temperature
Maximum intermittent temperature
a)
Storage temperature of unmixed parts
Value
-40 to 175 °C [-40 to 347 °F]
200 °C [392 °F]
16 to 27 °C [61 to 81 °F]
a)
Temperature that can be withstood for short periods without sustaining damage.
ISO 9001:2008 Registered Quality System. Burlington, Ontario, Canada SAI Global File: 004008
Date: 12 February 2018 / Ver. 3.00
Page 2
834FRB
Cured Properties
Physical Properties
Color
Flammability
Density @23 °C [73 °F]
Hardness
Flexural strength
Tensile strength
Tensile impact
Izod impact
Compressive strength
Lap shear strength (stainless steel)
Lap shear strength (aluminum)
Lap shear strength (copper)
Lap shear strength (brass)
Lap shear strength (ABS)
Lap shear strength (polycarbonate)
Method
Visual
94 V
ASTM D 792
Shore D Durometer
ASTM D 790
ASTM D 638
ASTM D 1822
ASTM D 256
ASTM D 695
ASTM D 1002
ASTM D 1002
ASTM D 1002
ASTM D 1002
ASTM D 1002
ASTM D 1002
Value
a)
Black
94 V-0
1.39 g/mL
83D
65 N/mm
2
[9 500 lb/in
2
]
23 N/mm
2
[3 400 lb/in
2
]
16 kJ/m
2
[7.8 ft·lb/in
2
]
2.39 kJ/m
2
[1.14 ft·lb/in
2
]
140 N/mm
2
[20 000 lb/in
2
]
24 N/mm
2
[3 500 lb/in
2
]
25 N/mm
2
[3 600 lb/in
2
]
20 N/mm
2
[2 900 lb/in
2
]
21 N/mm
2
[3 000 lb/in
2
]
1.8 N/mm
2
[260 lb/in
2
]
2.3 N/mm
2
[340 lb/in
2
]
Note: Specifications are for epoxy samples cured at 65 °C for 1 hour and conditioned at ambient
temperature and humidity.
a)
N/mm
2
= mPa; lb/in
2
= psi
ISO 9001:2008 Registered Quality System. Burlington, Ontario, Canada SAI Global File: 004008
Date: 12 February 2018 / Ver. 3.00
Page 3
834FRB
Cured Properties
Physical Properties
Outgassing (total mass loss) @24 h
Water vapor release
Collectable volatile condensable material
Method
ASTM D 595
ASTM D 595
ASTM D 595
Value
1.88%
0.33%
0.06%
Electrical Properties
Breakdown voltage @1.29 mm
Dielectric strength @1.29 mm
Breakdown voltage @3.175 mm [1/8"]
Dielectric strength @3.175 mm [1/8"]
Volume resistivity
Volume conductivity
Dielectric dissipation, D @1 MHz
Dielectric constant, k´ @1 MHz
Method
ASTM D 149
ASTM D 149
Reference fit
a)
Reference fit
a)
ASTM D 257
ASTM D 257
ASTM D 150-11
ASTM D 150-11
Value
27 400 V [27.4 kV]
540 V/mil [21.3 kV/mm]
43 000 V [43 kV]
344 V/mil [13.7 kV/mm]
1.4 x 10
15
Ω·cm
7.1 x 10
-16
S/cm
0.011
2.80
Note: Specifications are for epoxy samples cured at 65 °C for 1 hour and conditioned at ambient
temperature and humidity.
a)
To allow comparison between products, the dielectric strength was recalculated with the Tautscher
equation fitted to 5 experimental values and extrapolated to a standard thickness of 1/8" (3.175 mm).
ISO 9001:2008 Registered Quality System. Burlington, Ontario, Canada SAI Global File: 004008
Date: 12 February 2018 / Ver. 3.00
Page 4
834FRB
Cured Properties
Electrical Properties
Comparative Tracking Index (CTI)
Performance Level Class (PLC) = 1
Hot Wire Ignition (HWI)
High-Current Arc Ignition (HAI)
High Voltage Arc Tracking Rate (HVTR)
High Voltage, Low Current, Dry Arc Resistance
High Voltage Arc Resist. to Ignition (HVAR)
Method
ASTM D 3628
ASTM D 3874,
IEC 60695-2-20
UL 746A
UL 746A
ASTM D 495
ASTM D 495
Value
>600 V
45.24 s
139.40 arc
24.58 mm/min
69.24 s
27.33 s
Thermal Properties
Glass transition temperature (T
g
)
CTE
a)
prior T
g
after T
g
Thermal conductivity @25 °C [77 °F]
@50 °C [122 °F]
@100 °C [212 °F]
Thermal diffusivity @25 °C [77 °F]
Specific heat capacity @25 °C [77 °F]
Method
ASTM D 3418
ASTM E 831
ASTM E 831
ASTM E 1461
ASTM E 1461
ASTM E 1461
ASTM E 1461
ASTM E 1461
Value
39 °C [102 °F]
50 ppm/°C [122 ppm/°F]
178 ppm/°C [352 ppm/°F]
0.28 W/(m·K)
0.33 W/(m·K)
0.31 W/(m·K)
1.43 mm
2
/s
0.14 J/(g·K)
Note: Specifications are for epoxy samples cured at 65 °C for 1 hour and conditioned at ambient
temperature and humidity.
a)
Coefficient of Thermal Expansion (CTE) units are in ppm/°C = in/in/°C × 10
-6
= unit/unit/°C × 10
-6
ISO 9001:2008 Registered Quality System. Burlington, Ontario, Canada SAI Global File: 004008
Date: 12 February 2018 / Ver. 3.00
Page 5
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