Armstrong A-2/E Epoxy Adhesive

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Armstrong A-2/E Epoxy Adhesive
Categories:	Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive
Material Notes:	This off-white paste epoxy is a versatile adhesive systems. The choice of one of four recommended Activators (A, E, W or H-20) makes A-2 Adhesive an ideal choice for many applications. A-2 with Activators W or H-20 has a very low thermal expansion coefficient, especially important for bonding ceramics, porcelain, etc. A-2 with Activator A is qualified under Mil. Spec. MIL-A-47284 (MI). Information provided by Ellsworth Adhesives.
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Physical Properties	Metric	English	Comments

Viscosity	170000 cP	170000 cP	Mixed

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	87	87
Tensile Strength, Ultimate	43.8 MPa	6350 psi	after optimum cure
Elongation at Break	3.7 %	3.7 %
Adhesive Bond Strength	59.0 MPa	8550 psi	Steel-Steel; after optimum cure
	15.9 MPa @Temperature -54.4 °C	2300 psi @Temperature -66.0 °F	Aluminum-Aluminum tensile shear
	17.9 MPa @Temperature 82.2 °C	2600 psi @Temperature 180 °F	Aluminum-Aluminum tensile shear
	21.4 MPa @Temperature 25.0 °C	3100 psi @Temperature 77.0 °F	Aluminum-Aluminum tensile shear

Thermal Properties	Metric	English	Comments
CTE, linear	55.0 µm/m-°C @Temperature 20.0 °C	30.6 µin/in-°F @Temperature 68.0 °F
Glass Transition Temp, Tg	84.0 °C	183 °F

Processing Properties	Metric	English	Comments
Processing Temperature	93.3 °C	200 °F	Optimum cure is 1 hr. @ 200°F
Pot Life	<= 90.0 min @Temperature 25.0 °C	<= 90.0 min @Temperature 77.0 °F	100 g

Descriptive Properties
Color	White
Mix Ratio	100/6		By Weight

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PARM04 / 24536

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