Hexcel® HexPly® 996 Siloxane Resin

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Hexcel® HexPly® 996 Siloxane Resin
Categories:	Polymer; Thermoplastic; Siloxane
Material Notes:	Description: HexPly® 996 is a 350ºF (177ºC) curing cyanate siloxane resin with a 330ºF (165ºC) glass transition temperature. Standard cure is two hours at 350ºF (177ºC). HexPly® 996 can be autoclave and press cured. HexPly® 996 can be impregnated on all available fibers and fabrics. The recommended lay-up procedure for HexPly® 996 is HSP-L3. The recommended cure procedure is HSP-C1 or HSP-C6. Typical applications for HexPly® 996 are primary and secondary space structures where the optimum dimensional stability and lowest moisture absorption are required. Features: Lowest moisture absorbing cyanate resin system available Attractive electrical properties Good dimensional stability 350ºF (177ºC) cure Available in a broad range of reinforcements for both tapes and fabrics Good microcracking resistance Low outgassing Information provided by Hexcel Corporation.
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Physical Properties	Metric	English	Comments

Density	1.146 g/cc	0.04140 lb/in³
Outgassing - Total Mass Loss	0.0100 %	0.0100 %	CVCM
	0.100 %	0.100 %	WVR
	0.170 %	0.170 %	TML

Mechanical Properties	Metric	English	Comments
Tensile Strength	51.0 MPa	7400 psi
Elongation at Break	1.70 %	1.70 %
Tensile Modulus	3.00 GPa	435 ksi
Flexural Strength	76.0 MPa	11000 psi
Flexural Modulus	3.20 GPa	464 ksi
Compressive Strength	132 MPa	19100 psi

Thermal Properties	Metric	English	Comments
CTE, linear	57.53 µm/m-°C @Temperature 14.4 - 25.6 °C	31.96 µin/in-°F @Temperature 58.0 - 78.0 °F
Glass Transition Temp, Tg	169 °C	336 °F	RDS Torsion G1

Descriptive Properties
G1 C	2.36 in-lbs/in2

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PHEXCB9111 / 322267

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