Henkel Loctite® Stycast® US 5544 Two-Component Flexible, Flame Retardant, Polyurethane Compound

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Henkel Loctite® Stycast® US 5544 Two-Component Flexible, Flame Retardant, Polyurethane Compound
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	Loctite Stycast US 5544 provides the following product characteristics: Room temperature cure Application: Potting and Encapsulating Loctite Stycast US 5544 is a fast gelling, flexible, flame retardant, mineral-filled, polyurethane compound. Loctite Stycast US 5544 is a fast-setting potting compound which is low in viscosity, therefore flows well and adheres well to many substrates. It has very low odor and does not contain TDE or mercury compounds. Information provided by Henkel.
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Physical Properties	Original Value	Comments

Density	1.23 g/cc	Part A
	1.40 g/cc	Mixed
	1.46 g/cc	Part B
Water Absorption	0.15 % @Time 86400 sec
Viscosity	75 cP	Part A
	2000 cP	Mixed
	11000 cP	Part B
Linear Mold Shrinkage	0.0012 cm/cm

Mechanical Properties	Original Value	Comments
Hardness, Shore A	79 - 89
Tensile Strength	1320 psi

Electrical Properties	Original Value	Comments
Volume Resistivity	3.60e+13 ohm-cm
Dielectric Constant	3.85 @Frequency 100 Hz
Dielectric Strength	>= 400 V/mil
Dissipation Factor	0.020 @Frequency 100 Hz

Thermal Properties	Original Value	Comments
CTE, linear	114 µm/m-°C @Temperature -40.0 - 25.0 °C	Alpha 1
	155 µm/m-°C @Temperature 25.0 - 125 °C	Alpha 2
Thermal Conductivity	0.335 W/m-K
Flammability, UL94	V-2 @Thickness 6.35 mm
	V-0 @Thickness 9.52 mm

Processing Properties	Original Value	Comments
Cure Time	0.500 hour @Temperature 60.0 - 85.0 °C	Alternate
	2.00 - 4.00 hour @Temperature 23.0 °C	Recommended
Working Life	2.00 - 3.00 min
Gel Time	4.00 - 6.00 min

Descriptive Properties
Appearance	Clear Brown	Component A, Resin
	Opaque White	Component B, Hardener
	Opaque White	Mixed
Mix Ratio, by Volume	1 : 4.81	Part A : Part B
Mix Ratio, by Weight	15 : 85	Component A : Component B
Weight Loss (%)	0.19	Weight Loss after 168 hrs @ 130ºC

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PHENK7971 / 255455

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