Epoxies, Etc 20-2523 Polyurethane Potting & Encapsulating Compound

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Epoxies, Etc 20-2523 Polyurethane Potting & Encapsulating Compound
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	Description: 20-2523 is a high performance two component urethane system. This easy to use polyurethane is very low in viscosity and ideal for potting or encapsulating delicate electronic components. 20- 2523 exhibits very low shrinkage, stress, and exotherm throughout the cure cycle. This system is also well known for its outstanding thermal shock and excellent dielectric properties. 20-2523 is ideal for potting applications where a wide operating temperature (-55 to +130°C) is required. It is also a good choice when exposure to salt water, mild acids and bases, and aliphatic hydrocarbons is expected. Features: Does not contain MOCA or TDI Low stress on components Excellent dielectric properties Low viscosity Easy to handle Low shrinkage Very good thermal shock and vibration resistance Hydrolytic stability Information provided by Epoxies, Etc
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Physical Properties	Original Value	Comments

Specific Gravity	1.23 g/cc	Isocyanate
	1.46 g/cc	Polyol
Water Absorption	0.15 % @Time 86400 sec
	0.44 % @Time 605000 sec
Viscosity	200 cP	Isocyanate
	2950 cP	Mixed
	6000 cP	Polyol Resin
Storage Temperature	21.0 - 29.0 °C

Mechanical Properties	Original Value	Comments
Hardness, Shore D	50
Tensile Strength	1600 psi
Elongation at Break	50 %

Electrical Properties	Original Value	Comments
Volume Resistivity	3.40e+13 ohm-cm
Surface Resistance	1.50e+13 ohm
Dielectric Constant	4.7 @Frequency 100 Hz
Dielectric Strength	630 V/mil
Dissipation Factor	0.090 @Frequency 100 Hz

Thermal Properties	Original Value	Comments
CTE, linear	160 µm/m-°C
Maximum Service Temperature, Air	130 °C
Minimum Service Temperature, Air	-55.0 °C
Shrinkage	0.59 %

Processing Properties	Original Value	Comments
Cure Time	1.50 hour @Temperature 65.0 °C
	2.50 hour @Temperature 45.0 °C
	24.0 hour @Temperature 25.0 °C
	40.0 min @Temperature 85.0 °C
Pot Life	75.0 min

Descriptive Properties
Color	Black
Mix Ratio	100:20	Iso:Polyol, by weight
	100:23	Iso:Polyol, by volume

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PFEPOX020 / 316697

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