Henkel Loctite® Stycast® U 2516 HTR Two-Component Polyurethane Encapsulant

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Henkel Loctite® Stycast® U 2516 HTR Two-Component Polyurethane Encapsulant
Categories:	Polymer; Thermoplastic; Polyurethane, TP
Material Notes:	Loctite Stycast U 2516 HTR provides the following product characteristics: Two component Low viscosity Flexible polyurethane Low modulus High temperature resistance Cure: Room Temperature or Heat Cure Application: Encapsulant Typical Assembly Applications: Transformers, PCB's and other insulating applications Loctite Stycast U 2516 HTR 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. It can also be used to replace silicones. Information provided by Henkel.
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Physical Properties	Metric	English	Comments

Density	1.225 g/cc	0.04426 lb/in³	Mixed
	1.225 g/cc	0.04426 lb/in³	Part B
	1.475 g/cc	0.05329 lb/in³	Part A
Moisture Absorption	0.600 % @Temperature 24.0 °C, Time 86400 sec	0.600 % @Temperature 75.2 °F, Time 24.0 hour
	0.700 % @Temperature 100 °C, Time 3600 sec	0.700 % @Temperature 212 °F, Time 1.00 hour
Viscosity	135 cP	135 cP	Part B
	8000 cP	8000 cP	Mixed
	8000 cP	8000 cP	Part A

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	78	78
Tensile Strength	2.00 MPa	290 psi
Elongation at Break	>= 50 %	>= 50 %
Modulus of Elasticity	0.00700 GPa	1.02 ksi
Adhesive Bond Strength	3.00 MPa	435 psi	Tensile Lap Shear Strength, Al to Al

Electrical Properties	Metric	English	Comments
Volume Resistivity	3.10e+11 ohm-cm	3.10e+11 ohm-cm	500 Volts
Surface Resistance	1.80e+13 ohm	1.80e+13 ohm
Dielectric Constant	6.3 @Frequency 1e+6 Hz	6.3 @Frequency 1e+6 Hz
	7.8 @Frequency 50 Hz	7.8 @Frequency 50 Hz
	8.0 @Frequency 1000 Hz	8.0 @Frequency 1000 Hz
Dissipation Factor	0.040 @Frequency 1000 Hz	0.040 @Frequency 1000 Hz
	0.070 @Frequency 1e+6 Hz	0.070 @Frequency 1e+6 Hz
	0.96 @Frequency 50 Hz	0.96 @Frequency 50 Hz

Thermal Properties	Metric	English	Comments
CTE, linear	162 µm/m-°C @Temperature >=-5.00 °C	90.0 µin/in-°F @Temperature >=23.0 °F	Above Tg
Thermal Conductivity	0.600 W/m-K	4.16 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	150 °C	302 °F
Minimum Service Temperature, Air	-40.0 °C	-40.0 °F
Glass Transition Temp, Tg	-5.00 °C	23.0 °F

Processing Properties	Metric	English	Comments
Cure Time	240 min @Temperature 60.0 °C	4.00 hour @Temperature 140 °F	Option 2, Post Cure: 2 hours @ 100 to 120°C
	1440 min @Temperature 25.0 °C	24.0 hour @Temperature 77.0 °F	Option 1, Post Cure: 2 hours @ 100 to 120°C
Pot Life	360 min	360 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 Weight	100 : 7.8		Part A : Part B

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PHENK7964 / 255448

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