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PC-581

PC-581

One Component, Flexible, Heat Cure Epoxy

 

 

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.