ITW Insulcast® RTVS 42 CURTIS II Silicone Potting/Encapsulation Compound

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ITW Insulcast® RTVS 42 CURTIS II Silicone Potting/Encapsulation Compound
Categories:	Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade
Material Notes:	Insulcast® solutions are compounds designed for potting and encapsulating. RTVS 42 CURTIS II is a low viscosity unique silicone-epoxy copolymer formulated to withstand severe thermal shock and provide low moisture absorption and excellent dielectric insulation. It is UL 94V-0 certified under file # E86165. RTVS 42 CURTIS II contains silane adhesion promoters that enable it to bond well to most metals and plastics. Its unique chemistry combines the low temperature performance characteristics heretofore found only in silicones with the excellent encapsulating properties of epoxies. Information provided by ITW Performance Polymers.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.02 g/cc	1.02 g/cc	Uncured. Part B
	1.43 g/cc	1.43 g/cc	Uncured. Part A
Viscosity	125 cP	125 cP	Part B; ASTM D1084
	16000 cP	16000 cP	Mixed, Part A, Part B; ASTM D1084
	18000 cP	18000 cP	Part A; ASTM D1084

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	75	75	ASTM D2240
Hardness, Shore D	10 - 15	10 - 15
Tensile Strength	6.21 MPa	900 psi	ASTM D412
Elongation at Break	175 %	175 %	ASTM D412
Tear Strength	7.01 kN/m	40.0 pli	Die B; ASTM D624

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+15 ohm-cm	1.00e+15 ohm-cm	ASTM D257
Dielectric Constant	4.0 @Frequency 1000 Hz	4.0 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	19.7 kV/mm	500 kV/in	ASTM D149
Dissipation Factor	0.0060 @Frequency 1000 Hz	0.0060 @Frequency 1000 Hz	ASTM D150

Thermal Properties	Metric	English	Comments
CTE, linear	45.0 µm/m-°C	25.0 µin/in-°F
Thermal Conductivity	0.580 W/m-K	4.03 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	125 °C	257 °F
	155 °C	311 °F	intermittent use
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F
Glass Transition Temp, Tg	-60.0 °C	-76.0 °F	cured
Flammability, UL94	V-0	V-0
Shrinkage	0.20 - 0.50 %	0.20 - 0.50 %

Processing Properties	Metric	English	Comments
Cure Time	120 min @Temperature 65.0 °C	2.00 hour @Temperature 149 °F	8 hrs @ 25°C plus 2 hours @ 65°C
	1440 min @Temperature 25.0 °C	24.0 hour @Temperature 77.0 °F	option
Pot Life	<= 20.0 min	<= 20.0 min	Part A, Part B
Shelf Life	9.00 Month	9.00 Month	Part A, Part B

Descriptive Properties
Color	amber		part B, uncured
	black		part A, uncured
Mix Ratio by volume	100:7		Part A: Part B
Mix Ratio by weight	100:4-8		Part A: Part B

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

PITWIN9121 / 239631

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