POLYCAST 581
One Component, Flexible, Heat Cure Epoxy
DESCRIPTION:
Polycast 581 is a clear, one component, flexible, heat cure epoxy system designed for coil impregnation, and potting applications requiring low viscosity and minimal thermal stress.
| PROPERTIES - UNCURED: |
|
|
| Color, Visual |
Clear |
|
| Mixed Viscosity, cps. |
1350 |
ASTMD2393 |
| Specific Gravity |
1.04 |
|
| Pot Life @ 70° F, hours |
24 |
|
| Pot Life @ 100° F, hours |
1.5-2 |
|
| Pot Life @ 110° F, hours |
1-1.5 |
|
| Pot Life @ 115° F, hours |
3/4 |
|
| Shelf Life @ 72o F, months |
3 |
|
| |
|
|
| PROPERTIES - CURED: |
|
|
| Hardness Durometer (Shore D) |
40 |
ASTMD 2240 |
| Tensile Strength, psi |
5,500 |
ASTMD 638 |
| Tensile Elongation, % |
40 |
ASTMD 638 |
| Flexural Strength, psi |
12,000 |
ASTMD 790 |
| Coefficient of Thermal Expansion (cm/cm/°C) |
77 x 10-6 |
|
| Thermal Conductivity, BTU's (BTU-in/(ft2)(hr)(°F) |
1.9 |
|
| Useful Temperature Range, °C |
-40 - 155 |
|
| Dielectric Strength, volts/mil |
410 |
ASTMD 149 |
| Dielectric Constant, 60 Hz |
4.0 |
ASTMD 150 |
| Dissipation Factor, 60 Hz |
0.01 |
ASTMD 150 |
| Volume Resistivity, ohm-cm |
3.4 x 1014 |
ASTMD 257 |
CURE SCHEDULE:
6-8 hours @ 95°C - lowest shrinkage
3-5 hours @ 105°C
2-3 hours @ 120°C
NOTE: Post cure 2-3 hours at 150°C for optimum high temperature properties.
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