Henkel Loctite® Stycast® 5952-1 Two-Component Silicone Encapsulant

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Henkel Loctite® Stycast® 5952-1 Two-Component Silicone Encapsulant
Categories:	Polymer; Thermoset; Silicone; Silicone Elastomer, for Thermal Management
Material Notes:	Loctite Stycast 5952-1 provides the following product characteristics: Electrically non-conductive Good elongation strength Moderate tear strength High thermal conductivity Cure: Heat cure Application: Potting or Encapsulant Typical Assembly Applications: Transformers, Rectifiers, Thyristors, Power supplies and Heat generating modules Other Application Areas: Thermally conductive roll coatings, Heat sinks and Thermal pads Loctite Stycast 5952-1 is designed for encapsulation of heat generating devices. It is also recommended for applications requiring a non-corrosive casting and coating. Loctite Stycast 5952-1 may be cured over a broad range of temperatures. After 24 hours at room temperature, it will be hard enough to handle. Optimum properties will be achieved after 7 days. Loctite Stycast 5952-1 can be cured rapidly at elevated temperatures, even in thick sections. For optimum performance, follow the initial cure with a post cure of 2 hours at 175ºC. Information provided by Henkel.
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Physical Properties	Metric	English	Comments

Density	2.05 g/cc	0.0741 lb/in³	Mixed
	2.05 g/cc	0.0741 lb/in³	Part A
	2.125 g/cc	0.07677 lb/in³	Part B
Viscosity	25000 cP	25000 cP	Part B
	30000 cP	30000 cP	Mixed
	60000 cP	60000 cP	Part A

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	75	75
Tensile Strength	4.00 MPa	580 psi
Elongation at Break	45 %	45 %

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+14 ohm-cm	1.00e+14 ohm-cm
Dielectric Constant	5.0 @Frequency 1e+6 Hz	5.0 @Frequency 1e+6 Hz
Dielectric Strength	17.0 kV/mm	432 kV/in	ASTM D149
Dielectric Loss Index	0.010 @Frequency 1e+6 Hz	0.010 @Frequency 1e+6 Hz

Thermal Properties	Metric	English	Comments
CTE, linear	200 µm/m-°C	111 µin/in-°F
Thermal Conductivity	0.800 W/m-K	5.55 BTU-in/hr-ft²-°F

Processing Properties	Metric	English	Comments
Cure Time	60.0 min @Temperature 100 °C	1.00 hour @Temperature 212 °F	Loctite Stycast 5952-1 may be cured over a broad range of temperatures.
Pot Life	100 min @Temperature 100 °C	100 min @Temperature 212 °F	Mixed Pot Life
Shelf Life	6.00 Month	6.00 Month	Part A, from date of manufacture
	6.00 Month	6.00 Month	Part B, from date of manufacture

Descriptive Properties
Appearance	Red		Part A
	White		Part B
Mix Ratio, by Weight	1 : 1		Part A : Part B

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PHENK7940 / 255425

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