EPUSIL EP 140 FR
Very High Thermal Conductivity Epoxy Compound
DESCRIPTION
Epusil EP 140 FR
a potting/encapsulating epoxy system, UL 94 V 0
approved, giving extremely high thermal
conductivity. Several hardeners can be used to cure
EPUSIL EP 140 FR. However, where thermal
conductivity is critical, the hardeners with low
ratios should be used to prevent deterioration and
retention of properties.
PROPERTIES - UNCURED
EP 140
EPC 124 EPC 11
Color,
visual.............................……….
Black Clear Amber
Viscosity, ASTM-D-2393(c.p.s @ 250).
35000-55000 140 700
Specific Gravity (gr./cm3 @ 250
C)….. 2.2 +/- 0.05
0.98 1.13
Mix Ratio (by
weight)…………...........
100:7-7.2 100:4.5-5.5
Mix
Viscosity, ASTM-D-2393
………. 5000-6500
9500-11000
Pot Life @ 250 C (100
gr.)..……….......
60-80 min. 5-6 hrs.
Gel Time @ 250 C (100 gr.)
………….. 130-170
min 16-18 hrs. Shelf Life @ 250 C
(months)
…………..........
12 12 12
PROPERTIES - CURED
Physical
Hardness,
ASTM-D-2240 (Durometer Shore D)
… 80-85 88-92
Coefficient
of Thermal Expansion (cm/cm/0C)
….. 20 * 10-6
20 * 10-6
Flammability
(UL 94 V-) ………………………
V-0
ELECTRICAL
Dielectric
Strength, ASTM D-149 (volts/mil)
…… 410 420
Dielectric
Constant, ASTM -D- 150 ……………..
4.9 5.0
Dissipation
Factor, ASTM -D- 150 ……………..
0.015 0.010
Volume
Resistivity, ASTM -D- 257 (ohm-cm)
….. 1.2 * 1015
1.0 * 1015
Thermal
Conductivity W/m0C
…..………………… 1.35
1.35
MIXING INSTRUCTION
1.
Pre-heat Epusil EP 140 FR to 500C to 600
to enhance flow and air release.
2.
Stir contests thoroughly until all filler is
dispersed.
3.
Measure out required amount of Epusil EP 140 FR.
Weigh into it 7 to 7.2 parts of EPC 124 per 100
parts of Epusil EP 140 FR, or 4.5-5.5 parts EPC 11
per 100 parts Epusil EP 140 FR
4.
Mix thoroughly being sure to scrape sides and bottom
of mixing container.
5.
Where void-free castings or coatings are required,
de-gas for 2-5 minutes at½ to 1cm.Hg.
6.
Pour into mold or device.
CURE SCHDULE
Epcure EPC 124 – Room temperature cure (12 –16
hours)
Hard, rigid system
results
Final properties – 7
days
Epcure EPC 11 – Gel condition (16 – 18 hrs.)
Fast cure – 1200C
for 1 hour
Small mass – 800C
for 2 – 3 hours
Large mass (greater than
5 Ibs.) – 650C for 16 hours
Post cure – 1500C for 4 hours (necessary
for service temperature above 1300C)
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