A.14.12. Stycast 2850
PRODUCT
Type			2-part potting resin.
Chemical Composition			Epoxy.
Manufacturer	Emerson & Cumming Nijerheidsstraat 7, B-2260 Westerlo Belgium			Tel: +32 14 56 25 00 Fax: +32 14 56 25 01 Email: www.emersoncuming.com
EXPERIENCE & AVAILABILITY
Development Status			Commercial Product
Cost Range			Low
Lot Reproducibility			Excellent
Space Experience			Extensive
GENERAL PROPERTIES (Physical, Mechanical, Thermal, Electrical, Optical)
Nature			Typical Value		Remarks
Specific Gravity			2.3		Manufacturer’s Data
Viscosity (before reaction)			70 000 cps		Manufacturer’s Data
Pot Life			45 mins.		Manufacturer’s Data
Hardness			94		Shore D
Tensile Strength			60 MPa		Manufacturer’s Data
Compressive Modulus			80 MPa		Manufacturer’s Data
Thermal Expansion Coefficient			29 x 10^-6 °C^-1		Manufacturer’s Data
Thermal Conductivity			1.44 W m^-1 °C^-1		@ 25 °C
Electrical Resistivity (volume)			5 x 10^12 W m		@ 25 °C
Dielectric Constant			6.5		@ 60 Hz.
Loss Factor			0.02		@ 60 Hz.
Dielectric Strength			15 kV/mm		Manufacturer’s Data
PROPERTIES RELEVANT TO SPACE USE
Nature		Typical Value				Type of Test
Temperature Range		Up to 205°C				Manufacturer’s Data
Outgassing		TML = 0.38%, RML =0.24%, CVCM = 0.01%				ECSS-Q-70-02
Oxygen Index		29.8				ECSS-Q-70-21
Toxicity/Offgassing		Pass				NASA NHB 8060-1A
Water Absorption		< 0.15%				Over 7 days
Flammability		Pass (23.8% O2)				NASA NHB 8060-1B
SPECIAL RECOMMENDATIONS
· Recommended cure is 24 hours at room temperature, plus 4 hours at 60°C with catalyst 9. · Other catalysts are available for the same resin, but these will affect the properties: Catalyst 11 for high-temperature cure; Catalyst 24 LV for low viscosity. Some experience in space is available for both. · A derived resin (2850 KT) can be used for extremely high thermal conductance (4.2 W m^-1 °C^–1).