Flame Retardant Epoxy
Encapsulating & Potting Compound
833FRB Technical Data Sheet
833FRB
Description
The 833FRB
Flame Retardant Epoxy Encapsulating and Potting Compound
is an UL 94V-0 recognized
electronic grade epoxy in the QMFZ2 category. This two-part epoxy provides a black and self-
extinguishing finish with great insulation and protection value.
It protects against static discharges, shocks, vibrations, and mechanical impacts. It insulates against heat
and conductivity. It is extremely resistant to environmental humidity, salt water, and many harsh
chemicals.
Applications & Usages
The 833FRB epoxy is used to pot or encapsulate printed circuit assemblies in a protective block. The cured
epoxy improves reliability, operational range, and lengthens the life of electrical and electronic parts.
It also helps hide and restrict access to intellectual property.
Its primary applications are in the automobile, marine, aerospace, aviation, communication,
instrumentation, and industrial control equipment.
Benefits and Features
Certified
UL 94V-0
(File # E334302)
Specification verified as per
UL 746A
Mix ratio 2A:1B
compatible with most dispensing equipment
Extreme resistance to water and humidity
Protects electronics from
moisture, corrosion, fungus, thermal shock, and static discharges
Strong chemical resistance
to brine, acids, bases, and aliphatic hydrocarbons
Volatile organic compound (VOC) and solvents free
Usage Parameters
Properties
Working Life
a)
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
60 min
5y
24 h
60 min
45 min
35 min
Temperature Ranges
Properties
Constant Service
Temperature
Maximum Temperature
Extrema
b)
Storage Temperature
of Unmixed Parts
Value
-30 to 175 °C
[-22 to 347 °F]
200 °C
[392 °F]
16 to 27 °C
[61 to 81 °F]
a) Working life assumes room temperature for a
100 g sample. A 10 °C increase can decrease
the work life by half.
b) Maximum short-term exposure temperature
toleration limit—not recommended as a
sustained or repeated operation condition
Page
1
of
7
Rev. Date: 13 December 2016 / Ver. 1.02
Flame Retardant Epoxy
Encapsulating & Potting Compound
833FRB Technical Data Sheet
833FRB
Principal Components
Name
Part A: Epoxide Resin
Alkyl glycidyl ether
Part B: Curing Amine
Triethylenetetramine
CAS Number
28064-14-4, 25068-38-6
68609-97-2
68410-23-1
112-24-3
Properties of Cured 833FRB
Physical Properties
Color
Density @21 °C [70 °F]
Flammability
Tensile Strength
Compressive Strength
Lap Shear Strength (Stainless Steel)
Lap Shear Strength (Aluminum)
Flexural Strength
Tensile Impact
Izod Impact
Hardness
Outgassing (Total Mass Loss)
Ash Content
Electrical Properties
Breakdown Voltage @68.11 mil (1.736 mm)
Dielectric Strength
Breakdown
Voltage @3.175 mm [1/8”]
Dielectric Strength
Volume Resistivity
Surface Resistivity
Comparative Tracking Index (CTI)
Dissipation & Constant @60 Hz
Dissipation & Constant
@1 kHz
Dissipation & Constant
@10 kHz
Dissipation & Constant
@100 kHz
Dissipation & Constant
@1 MHz
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
Visual
ASTM D 792
94V
ASTM D 638
ASTM D 695
ASTM D 1002
"
ASTM D 790
ASTM D 1822
ASTM D 256
Shore D Durometer
ASTM E 595
ISO 3451-1
Method
ASTM D 149
Reference fit
b)
ASTM D 149
ASTM D 257
"
ASTM D 3628
ASTM D 150-98
"
"
"
"
Value
a)
Black
1.26 g/mL
94V-0
12 N/mm
2
167 N/mm
2
13 N/mm
2
15 N/mm
2
40 N/mm
2
21 kJ/m
2
1.1 kJ/m
2
77D
1.45%
1.27%
[1 700 lb/in
2
]
[24 200 lb/in
2
]
[1 900 lb/in
2
]
[2 200 lb/in
2
]
[5 800 lb/in
2
]
[10 ft·lb/in]
[0.5 ft·lb/in]
ASTM D 495
"
Value
32.2 kV
471 V/mil
[18.5 kV/mm]
43.5 kV
348 V/mil
[13.7 kV/mm]
15
2.71 x 10
Ωcm
2 x 10
15
Ω/sq
322 V
Dissipation (D)
Constant
(k’)
0.018
3.45
0.012
3.40
0.013
3.31
0.014
3.25
0.014
3.18
52.8 s
94.8 arc
48 mm/min
37.6 s
4.6 s
a) N/mm2 = mPa; lb/in
2
= psi;
b) To allow comparison between products, the Tautscher equation was fitted to 5 experimental dielectric
strengths and extrapolated to a standard reference thickness of 1/8”
(3.175 mm).
Page
2
of
7
Rev. Date: 13 December 2016 / Ver. 1.02
Flame Retardant Epoxy
Encapsulating & Potting Compound
833FRB Technical Data Sheet
833FRB
Thermal Properties
Glass Transition Temperature (Tg)
Coefficient of Thermal Expansion (CTE)
a)
Before Tg
After Tg
Thermal Conductivity @25 °C [77 °F]
Thermal Conductivity
@50 °C [122 °F]
Thermal Conductivity
@100 °C [212 °F]
a) ppm/°C = in/in/°C × 10
-6
= unit/unit/°C × 10
-6
Method
ASTM D 3418
ASTM E 831
"
"
ASTM E 1461
"
"
Value
56 °C
74 ppm/°C
188 ppm/°C
0.28 W/(mK)
0.29 W/(mK)
0.29 W/(mK)
Properties of Uncured 833FRB
Physical Properties
Color
Viscosity @20 °C [73 °F]
a)
Density
Mix Ratio by weight (A:B)
Mix Ratio by volume (A:B)
Solids Content (w/w)
Mixture (2A:1B)
Black
11 500 cP [11.5 Pa·s]
1.30 g/mL
2.0:1.0
2.0:1.0
~100%
Physical Properties
Color
Viscosity @24 °C [73 °F]
a)
Density
Odor
Part A
Dark Grey
4 000 cP [4.0 Pa·s]
1.31 g/mL
Mild
Part B
Black
14 000 cP [14 Pa·s]
1.18 g/mL
Mild
a) Brookfield viscometer at 50 RPM with spindle 4
Compatibility
Adhesion—As
seen in the substrate adhesion table, the 833FRB epoxy adheres to most materials found
on printed circuit assemblies; however, it is not compatible with contaminants like water, oil, and greasy
flux residues that may affect adhesion. If contamination is present, clean the printed circuit assembly with
electronic cleaner such as MG Chemicals 4050 Safety Wash, 406B Superwash, or 824 Isopropyl Alcohol.
Page
3
of
7
Rev. Date: 13 December 2016 / Ver. 1.02
Flame Retardant Epoxy
Encapsulating & Potting Compound
833FRB Technical Data Sheet
833FRB
Substrate Adhesion in Decreasing Order
Physical Properties
Aluminum
Steel
Fiberglass
Wood
Glass
Polycarbonate
Acrylic
Polypropylene
Adhesion
Stronger
Weaker
Chemical Resistance—Integrity
Testing Laboratories, Inc.
performed water absorbance and chemical
resistance estimation of the 833FRB using the IPC-TM-650 method. The chemical solvent resistance table
presents the percent weight change and effect notes for this method. The results show low water
absorption and a high chemical resistance to salt water and most ionic species including low concentration
of sulfuric and citric acids; and sodium hydroxide base. Softening and swelling occurs for aggressive
organic solvents.
Chemical Solvent Resistance (IPC-TM-650)
Physical Properties
Water
Heptane
Salted Water (NaCl), 10%
Sodium Hydroxide, 10%
Citric Acid, 10%
Ammonium Carbonate, 2%
Sulfuric Acid, 3%
Sulfuric Acid, 30%
Ethanol
Hydrochloric Acid, 5%
Nitric Acid, 10%
Phenol, 5%
Carbon Tetrachloride
Acetone
Ethyl Acetate
Toluene
Ethylene Dichloride
Weight Change
0.23%
0.25%
0.40%
0.42%
0.70%
0.70%
0.75%
0.74%
2.00%
1.40%
1.80%
7.60%
16.50%
17.67%
18.70%
26.74%
Ruptured
Note
Softened
Swelled
Softened
Softened
Softened
Softened
and Swelled
and
and
and
and
Swelled
Swelled
Swelled
Swelled
Page
4
of
7
Rev. Date: 13 December 2016 / Ver. 1.02
Flame Retardant Epoxy
Encapsulating & Potting Compound
833FRB Technical Data Sheet
833FRB
Storage
Store between 16 and 27 °C [60 and 80 °F] in dry area away from sunlight. Prolonged storage or storage
at or near freezing temperatures can result in crystallization.
If crystallization occurs, reconstitute the component to its original state by temporarily warming it to 50 to
60 °C [122 to 140 °F]. To ensure full homogeneity, stir thoroughly the warm component, reincorporating
all settled material. Re-secure container lid and let cool down before use.
Health, Safety, and Environmental Awareness
Please see the 833FRB
Safety Data Sheet
(SDS) parts A and B for more details on transportation,
storage, handling and other security guidelines.
Health and Safety:
The 833 FRB parts can ignite if the liquid is heated, but once it is cured it is a self-
extinguishing epoxy solid. Do not breathe in fumes of a cured epoxy block that is exposed to an external
flames source because the flame retardant releases bromine to extinguish the flame.
Wear safety glasses or goggles and disposable polyvinyl chloride, neoprene, or nitrile gloves while
handling liquids. Part B in particular may causes skin burns and may cause sensitization if exposed over a
long period of time. The epoxy is black and will not wash off once cured: wear protective work clothing.
Wash hands thoroughly after use or if skin contact occurs. Do not ingest. While the product has low
volatility and moderate odor, use in well-ventilated area.
The cured epoxy resin presents no known hazard.
Part A
HMIS® RATING
HEALTH:
FLAMMABILITY:
PHYSICAL HAZARD:
PERSONAL PROTECTION:
Part B
HMIS® RATING
HEALTH:
FLAMMABILITY:
PHYSICAL HAZARD:
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 (Low or none); 1 (Slight); 2 (Moderate); 3 (Serious); 4 (Severe)
Page
5
of
7
Rev. Date: 13 December 2016 / Ver. 1.02
NFPA® 704 CODES
NFPA® 704 CODES
* 2
0
0
0
2
1
0
* 3
1
0
1
3
1
0
单片机
