Armstrong C-7/W Epoxy Adhesive, 3:2 Mix Ratio

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Armstrong C-7/W Epoxy Adhesive, 3:2 Mix Ratio
Categories:	Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive, Flexible
Material Notes:	A clear, unfilled, medium viscosity adhesive recommended for use with any Armstrong Activator. Physical property data included covers C-7 used with Activators W and H-20. All other Activators may also be used to achieve specific characteristics in the completed bond- see appropriate Data Sheet for details. C-7 with Activator W offers maximum versatility in that differing degrees of flexibility can be achieved by varying the mixing ratios within the recommended limits. C-7 with Activator W meets the requirements of Navy Specs. XWS15351 and WS 09125C. C-7, when used with Activator H-20, offers a tough yet rigid bond. Information provided by Ellsworth Adhesives.
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Physical Properties	Original Value	Comments

Viscosity	16000 cP	Mixed

Mechanical Properties	Original Value	Comments
Hardness, Shore D	80
Tensile Strength, Ultimate	6100 psi	after optimum cure
Elongation at Break	4.9 %
Adhesive Bond Strength	4500 psi	Steel-Steel; after optimum cure
	1600 psi @Temperature 82.2 °C	Aluminum-Aluminum tensile shear
	3000 psi @Temperature -54.4 °C	Aluminum-Aluminum tensile shear
	3600 psi @Temperature 25.0 °C	Aluminum-Aluminum tensile shear

Thermal Properties	Original Value	Comments
CTE, linear	33.0 µm/m-°C @Temperature 20.0 °C
Glass Transition Temp, Tg	68.0 °C

Processing Properties	Original Value	Comments
Processing Temperature	72.0 °F
	200 °F	Optimum cure is 15 min. @ 200°F
	300 °F	Fast cure is 5 min. @ 300°F
Pot Life	<= 90.0 min @Temperature 25.0 °C	100 g

Descriptive Properties
Color	Amber
Mix Ratio	3/2	By Weight

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