EPUSIL EP 145
Very High Thermal Conductivity Casting Epoxy
Compound
DESCRIPTION
Epusil EP 145 a mid viscosity, highly filled,
epoxy formulation which, in addition to having
excellent electrical properties, has high thermal
conductivity and low thermal expansion.
PROPERTIES - UNCURED
EP 145
EPC 145
Color,
visual.............................……….
Black
Viscosity,
ASTM-D-2393(c.p.s @ 250). 60
-80000
Specific Gravity
………………............ 1.8 +/-
0.02 1.0+/-0.02
Mix Ratio
(weight)
...............................
100:10.6
Mix Viscosity,
ASTM-D-2393 (@ 250).
12-15000 c.p.s
Pot Life @ 250
C (100
gr.)..……….......
90 –100 min.
Gel Time @ 250 C
(100 gr)……………
160 – 190 min.
Shelf Life @ 25
0C (months) …............... 12
12
PROPERTIES - CURED
PHYSICAL
Hardness,
ASTM-D-2240 (Durometer)…………………… Shore D 78-83
Tensile
Strength, ASTM D-638 …………………………. 8000 psi
Tensile
Elongation, ASTM D-638 ……………….………. 1 %
Compressive
Strength, ASTM D-695 …………….……… 18500 psi
Flexural Strength,
ASTM-D-790…………………………. 11500 psi
Coefficient of
Thermal Expansion (cm/cm/0C)...………….
28 * 10-6
Heat Distortion
point.......................……………………… 800C
ELECTRICAL
Dielectric Strength,
ASTM D-149 (volts/mil) ……………. 475
Dielectric Constant,
ASTM -D- 150 ……………………… 6.3
Dissipation Factor,
ASTM -D- 150 ……………………… 0.02
Volume Resistivity,
ASTM -D- 257 (ohm-cm) ………….. 1.3 * 1016
Thermal
Conductivity, W/m 0C …………………………...
1.45
MIXING INSTRUCTION
1.
Warm Epusil EP 145 to 30 – 40 0C and stir
contents thoroughly before withdrawing any material.
2.
Weigh out required amount of Epusil EP 145 and weigh
into it 10.6+/-0.2 parts of EPC 145 per 100 parts
Epusil EP 145.
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
Gel time – 180 min,
De mold time 6-8 hrs. Final properties – 7 days
Hardens when cured at ambient is 75-80 Shored. After
post cure at 800 C, the hardness will be
80-84 Shore D
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