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	Metric	English	Comments

Viscosity	16000 cP	16000 cP	Mixed

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	80	80
Tensile Strength, Ultimate	42.1 MPa	6100 psi	after optimum cure
Elongation at Break	4.9 %	4.9 %
Adhesive Bond Strength	31.0 MPa	4500 psi	Steel-Steel; after optimum cure
	11.0 MPa @Temperature 82.2 °C	1600 psi @Temperature 180 °F	Aluminum-Aluminum tensile shear
	20.7 MPa @Temperature -54.4 °C	3000 psi @Temperature -66.0 °F	Aluminum-Aluminum tensile shear
	24.8 MPa @Temperature 25.0 °C	3600 psi @Temperature 77.0 °F	Aluminum-Aluminum tensile shear

Thermal Properties	Metric	English	Comments
CTE, linear	33.0 µm/m-°C @Temperature 20.0 °C	18.3 µin/in-°F @Temperature 68.0 °F
Glass Transition Temp, Tg	68.0 °C	154 °F

Processing Properties	Metric	English	Comments
Processing Temperature	22.2 °C	72.0 °F
	93.3 °C	200 °F	Optimum cure is 15 min. @ 200°F
	149 °C	300 °F	Fast cure is 5 min. @ 300°F
Pot Life	<= 90.0 min @Temperature 25.0 °C	<= 90.0 min @Temperature 77.0 °F	100 g

Descriptive Properties
Color	Amber
Mix Ratio	3/2		By Weight

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.

PARM32 / 24564

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