EPUSIL EP 140
Very High Thermal Conductivity Casting Epoxy
Compound
DESCRIPTION
Epusil EP 140 a low
viscosity, highly filled, epoxy formulation which,
in addition to having excellent electrical
properties, has unusually high thermal conductivity
and low thermal expansion. Epusil EP 140 is
available in a thixotropic version for dipping
applications.
PROPERTIES - UNCURED
EP 140
EPC 9 EPC 11
Color,
visual.............................……….
Black/Gray/Red
Viscosity,
ASTM-D-2393(c.p.s @ 250).
40-60000
Specific Gravity
………………............ 2.3
Mix Ratio (weight)
...............................
100:3-4 100:4.5-5
Mix Viscosity,
ASTM-D-2393 (@ 250).
30000 c.p.s 30000 c.p.s
Pot Life @ 250
C (100
gr.)..……….......
1 hour 4-5 hours
Shelf Life @ 25
0C (months) …............... 12 min
PROPERTIES - CURED
PHYSICAL
Hardness,
ASTM-D-2240 (Durometer)………………… Shore D
90 Shore D 92
Tensile
Strength, ASTM D-638 ……………………… 8000 psi
8500 psi
Tensile
Elongation, ASTM D-638 ……………….……. 1
% 1 %
Compressive
Strength, ASTM D-695 …………….……… 18500 psi
25000 psi
Flexural Strength,
ASTM-D-790…………………………. 11500 psi
13000 psi
Coefficient of
Thermal Expansion (cm/cm/0C)...………….
28 * 10-6 24 * 10-6
Heat Distortion
point.......................……………………… 1500C
1800C
ELECTRICAL
Dielectric Strength,
ASTM D-149 (volts/mil) …………….
475 500
Dielectric Constant,
ASTM -D- 150 ………………………
6.3 6.5
Dissipation Factor,
ASTM -D- 150 ……………………… 0.02
0.02
Volume Resistivity,
ASTM -D- 257 (ohm-cm) ………….. 1.3 * 1016
5 * 1016
Thermal
Conductivity, W/m 0C …………………………...
1.45 1.45
MIXING INSTRUCTION
1.
Warm Epusil EP 140 to 40 – 50 0C and stir
contents thoroughly before withdrawing any material.
2.
Weigh out required amount of Epusil EP 140 and weigh
into it 3-4 parts EPC 9 per 100 parts Epusil EP 140;
or 4-5 parts EPC 11 per 100 parts Epusil EP 140.
3.
Mix curing agent in thoroughly.
4.
De-air (if necessary) at 0.5 cm. Hg. For 10 minutes.
5.
Pour into mold or cavity.
CURE SCHDULE
EPC 9 – overnight at
room temperature; or 2 hours at 60 0C.
EPC 11 – overnight at 50 0C; or 2 hours
at 1000C; or 1 hour at 1250C.
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