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POLYCAST-205

POLYCAST-205

Epoxy Casting Compound, Room Temperature Cure
P.C.205 is a 100% solids epoxy system. It is a filled, low cost, general purpose epoxy encapsulant. Polycast 205 is designed in such a way that the mix ratio is 4:1 by volume. Room temperature. Excellent moisture resistance. Also machine dispensable.




Specifications · Cure Schedule · Mixing Instructions

Specifications

Color, Visual

 Black (Part A)
Clear (Part B)

Viscosity, cps (ASTMD 2393)

 7-10000 (Part A)
2000 (Part B)

Specific Gravity

 1.0 (Part B)
1.5 (Part A)

Mix Ratio

 4:1 (By Volume)

Mixed Viscosity (ASTM-D-2393 @ 25 °C)

 3-4000

Pot Life

 40 minutes [&64; 25°C (100 grams)]

Shelf Life @ 70 °F

 12 months min. (@ 70°F)

Hardness, ASTM-D-2240 (Durometer)

 82 (Shore D)

Tensile Strength (ASTM-D-638)

 8500 psi

Tensile Elongation (ASTM-D-638)

 6 %

Flexural Strength (ASTM-D-790)

 9500 psi (ASTM-D-790)

Coefficient of Thermal Expansion

 20 x 105

Heat Distortion Point

 80 ºC

Water Absorption

 0.08 %

Dielectric Strength (ASTM-D-149)

 425 V/mil (ASTMD 149)

Dielectric Constant

 3.6 (ASTM-D-150)

Dissipation Factor

 0.035 (ASTM-D-150)

Volume Resistivity (ASTM-D-257)

 1 x 1014 ohm-cm

Thermal Conductivity

 6 BTU's


Cure Schedule
Room temperature cure @ 75 °F with full properties after 24 hours.
To accelerate cure, allow 2 hours @ room temperature, then 2 hours @ 125 °F.



Mixing Instructions
Pre-mix Part A and Part B separately. Then measure 4:1 by volume (A to B).Mix thoroughly scraping the sides and bottom of the container. Evacuate and then pour into mold or cavity.
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