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	Original Value	Comments

Density	1.23 g/cc	Part B
	1.50 g/cc	Part A
Moisture Absorption	0.800 % @Time 86400 sec
Viscosity	5.0 cP	Part B
	6000 cP	Mixed
	12500 cP	Part A

Mechanical Properties	Original Value	Comments
Hardness, Shore A	75
Tensile Strength	3.50 MPa
Elongation at Break	70 %
Modulus of Elasticity	0.00700 GPa
Adhesive Bond Strength	2.50 MPa	Tensile Lap Shear Strength, Al to Al

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

Thermal Properties	Original Value	Comments
CTE, linear	175 µm/m-°C
Thermal Conductivity	0.600 W/m-K
Maximum Service Temperature, Air	125 °C
Minimum Service Temperature, Air	-40.0 °C
Glass Transition Temp, Tg	-68.0 °C	TMA

Processing Properties	Original Value	Comments
Cure Time	4.00 hour @Temperature 60.0 °C	Alternate, A post cure of 2 hours @ 100 to 120°C is recommended.
	24.0 hour @Temperature 25.0 °C	Recommended, Post cure of 2 hours @ 100 to 120°C is recommended.
Pot Life	45.0 min
Shelf Life	6.00 Month @Temperature 18.0 - 25.0 °C

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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