Park Aerospace Nelcote® S-860 Silicone Prepreg, 1581-112NPH E-Glass Reinforced

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Park Aerospace Nelcote® S-860 Silicone Prepreg, 1581-112NPH E-Glass Reinforced
Categories:	Polymer; Thermoset; Silicone
Material Notes:	Nelcote® S-860 is a MIL-P-25518 type silicone resin with a good combination of electrical and high temperature properties. GMS4001 qualified specifications Key Features and Benefits: 500°F maximum service temperature Good electrical and mechanical properties at high temperatures Low out-gassing for space applications Applications/Qualifications: Radomes Aircraft Structures Information provided by Park Electrochemical Corp.
Key Words:	SI
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Physical Properties	Metric	English	Comments

Density	1.76 g/cc	0.0636 lb/in³
Volatiles	<= 2.5 % @Temperature 163 °C	<= 2.5 % @Temperature 325 °F	8 min

Mechanical Properties	Metric	English	Comments
Hardness, Barcol	59	59
Tensile Strength, Yield	221 MPa @Temperature 23.9 °C	32000 psi @Temperature 75.0 °F	0° Direction, Dry; ASTM D638 Type 1
Tensile Modulus	18.6 GPa @Temperature 23.9 °C	2700 ksi @Temperature 75.0 °F	0° Direction, Dry; ASTM D638 Type 1
Flexural Strength	283 MPa @Temperature 23.9 °C	41000 psi @Temperature 75.0 °F	Dry; ASTM D790
Flexural Modulus	18.6 GPa @Temperature 23.9 °C	2700 ksi @Temperature 75.0 °F	Dry; ASTM D790
Compressive Strength	165 MPa @Temperature 23.9 °C	24000 psi @Temperature 75.0 °F	Dry; ASTM D695
Compressive Modulus	19.3 GPa @Temperature 23.9 °C	2800 ksi @Temperature 75.0 °F	Dry; ASTM D695

Electrical Properties	Metric	English	Comments
Dielectric Constant	4.15 @Frequency 9.375e+9 Hz	4.15 @Frequency 9.375e+9 Hz
Dissipation Factor	0.013 @Frequency 9.375e+9 Hz	0.013 @Frequency 9.375e+9 Hz

Processing Properties	Metric	English	Comments
Gel Time	3.00 - 4.00 min	3.00 - 4.00 min
Shelf Life	3.00 Month @Temperature 4.44 °C	3.00 Month @Temperature 40.0 °F
	6.00 Month @Temperature -17.8 °C	6.00 Month @Temperature 0.000 °F

Descriptive Properties
Fabric Area Weight (g/m²)	302
Prepreg Resin Content (%)	31-41
Resin Flow (%)	10-16		340°F, 10psi

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.

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PPARK069 / 89341

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