EPUSIL EP 174 and EP 174 LV
Epoxy Casting
Compound with Adjustable Flexibility
DESCRIPTION
Epusil EP 174 and
EP 174 LV (low viscosity) are epoxy-casting
compounds, which permit the user to select the
degree of flexibility desired. They are used for
electronic casting and embedment, and for sealing
and cementing of plastics, metals, ceramics, wood
and rubber. They display good low temperature
flexibility and resist cracking down to –550C
even in a thin film. The flexibility of Epusil EP
174 and EP 174 LV is determined by the amount of
Epcure 174 or Epcure 24 (low viscosity version of
Epcure 174) used to cure them according to the
following suggested ranges:
Flexible
Approx. 30 Shore D
100 Epusil EP
174 100 Epusil EP
174 LV
150 Epcure
174 100 Epcure
24
Semi-Rigid Approx.
50 Shore D
100
Epusil EP 174 100
Epusil EP 174 LV
100 Epcure 174
50 Epcure 24
Rigid
Approx. 75 Shore D
100
Epusil EP 174 100
Epusil EP 174 LV
50
Epcure 174 25
Epcure 24
PROPERTIES – UNCURED
Average –
will depend on ratio of Epusil
EP 174 Epusil EP 174 LV
&
Epcure 174
& Epcure 24
Mixed
Viscosity (cps) …...………
35-40,000 15-20,000
Specific
Gravity (gr./cm3
@ 250
C)
1.4 1.4
PROPERTIES - CURED
PHYSICAL
Hardness,
ASTM-D-2240 (Durometer)……. A-35 /
D-90 A-35 / D-90
Coefficient of
Thermal Expansion (0C) ……. 2.8 * 10-5
2.5 * 10 -5
Water Absorption (in
24 hours) ……………
0.5% 0.5%
Flexural
Strength (kg/cm2.)
……………….. 475 475
Temperature Range (0C)
…………………… -50 to 120 -50 to
100
ELECTRICAL
Dielectric Strength
(volts/mil) …………….…
410 410
Dielectric
Constant (@ 60 Hz.) …………….. 4.4 4.4
(@ 103
Hz.) …….……………………………
4.1 4.1
(@ 106 Hz.)
…………………………………3.4
3.4
Dissipation Factor
(@ 60 Hz.) ……………..
0.05 0.05
(@103
Hz.) …………………………………
0.04 0.04
(@ 106 Hz.)
………………………………..
0.03 0.03
Volume
Resistivity (ohm-cm) ………………. 5 * 1013
5 * 1013
Thermal Conductivity
…………..…………… 0.34 W/m0C
0.41 W/m0C
MIXING INSTRUCTION
1.
Mix Epusil 174 or EP 174 LV in original container to
assure uniformity.
2.
Weigh out desired amount of Epusil and Epcure 174 or
24, mix together thoroughly.
3.
Pour into unit, mold, container, etc. Air removal
can be effected with vacuum.
Demolding can be done in 8 hours at 250C,
although property development will continue for an
additional 24-48 hours. For castings of 0.5 kg. or
less, elevated temperatures (to 650C)
will accelerate the cure.
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