Henkel Loctite® Stycast® U 2500 TEM Two-Component Polyurethane Encapsulant

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Henkel Loctite® Stycast® U 2500 TEM Two-Component Polyurethane Encapsulant
Categories:	Polymer; Thermoplastic; Polyurethane, TP
Material Notes:	Loctite Stycast U 2500 TEM provides the following product characteristics: Low viscosity Flexible Excellent wetting properties Cure: Room Temperature or Heat Cure Application: Encapsulant Typical Assembly Applications: Transformers, PCB's and other insulating applications Loctite Stycast U 2500 TEM flexible polyurethane encapsulant is formulated to have low viscosity and excellent wetting properties allowing complete impregnation of either small slightly wound coils or large castings. Information provided by Henkel.
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Physical Properties	Metric	English	Comments

Density	1.23 g/cc	0.0444 lb/in³	Part B
	1.50 g/cc	0.0542 lb/in³	Part A
Moisture Absorption	0.800 % @Time 86400 sec	0.800 % @Time 24.0 hour
Viscosity	5.0 cP	5.0 cP	Part B
	6000 cP	6000 cP	Mixed
	12500 cP	12500 cP	Part A

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	75	75
Tensile Strength	3.50 MPa	508 psi
Elongation at Break	70 %	70 %
Modulus of Elasticity	0.00700 GPa	1.02 ksi
Adhesive Bond Strength	2.50 MPa	363 psi	Tensile Lap Shear Strength, Al to Al

Electrical Properties	Metric	English	Comments
Volume Resistivity	5.00e+11 ohm-cm	5.00e+11 ohm-cm	500 Volts
Surface Resistance	1.00e+14 ohm	1.00e+14 ohm
Dielectric Constant	6.0 @Frequency 1e+6 Hz	6.0 @Frequency 1e+6 Hz
Dissipation Factor	0.060 @Frequency 1e+6 Hz	0.060 @Frequency 1e+6 Hz

Thermal Properties	Metric	English	Comments
CTE, linear	175 µm/m-°C	97.2 µin/in-°F
Thermal Conductivity	0.600 W/m-K	4.16 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	125 °C	257 °F
Minimum Service Temperature, Air	-40.0 °C	-40.0 °F
Glass Transition Temp, Tg	-68.0 °C	-90.4 °F	TMA

Processing Properties	Metric	English	Comments
Cure Time	240 min @Temperature 60.0 °C	4.00 hour @Temperature 140 °F	Alternate, A post cure of 2 hours @ 100 to 120°C is recommended.
	1440 min @Temperature 25.0 °C	24.0 hour @Temperature 77.0 °F	Recommended, Post cure of 2 hours @ 100 to 120°C is recommended.
Pot Life	45.0 min	45.0 min
Shelf Life	6.00 Month @Temperature 18.0 - 25.0 °C	6.00 Month @Temperature 64.4 - 77.0 °F

Descriptive Properties
Appearance	Amber		Part B
	Black		Part A
Mix Ratio, by Volume	100 : 8.5		Part A : Part B
Mix Ratio, by Weight	100 : 7		Part A : Part B

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PHENK7963 / 255447

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