Henkel Loctite® ECCOBOND FP4531 Epoxy

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Henkel Loctite® ECCOBOND FP4531 Epoxy
Categories:	Polymer; Thermoset; Epoxy
Material Notes:	Appearance: Black Cure: Heat cure Product Benefits: Snap curable Fast flow Passes NASA outgassing Application: Underfill Typical Application: Flex applications LOCTITE ECCOBOND FP4531 underfill is designed for flip chip on flex applications with a 1mil gap. LOCTITE ECCOBOND FP4531 passes NASA outgassing standards. Information provided by Loctite®
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Physical Properties	Original Value	Comments

Filler Content	62 %	Ignition
Brookfield Viscosity	10000 cP	Cone & Plate, CP52, Speed 20 rpm

Mechanical Properties	Original Value	Comments
Flexural Modulus	7600 MPa

Electrical Properties	Original Value	Comments
Volume Resistivity	1.71e+16 ohm-cm
Surface Resistance	1.87e+16 ohm
Dielectric Constant	3.29 @Frequency 1e+6 Hz
	3.3 @Frequency 2.00e+6 Hz
	3.34 @Frequency 100000 Hz
Dielectric Strength	57.9 kV/mm
Dissipation Factor	0.0071 @Frequency 1e+6 Hz
	0.0073 @Frequency 2.00e+6 Hz
	0.0088 @Frequency 100000 Hz

Thermal Properties	Original Value	Comments
CTE, linear	28.0 µm/m-°C	Cured, Below Tg
	104 µm/m-°C	Cured, Above Tg
Thermal Conductivity	0.610 W/m-K	Cured
Glass Transition Temp, Tg	161 °C	Cured, by TMA

Processing Properties	Original Value	Comments
Cure Time	7.00 min @Temperature 160 °C	Snap Cure
Gel Time	6.00 min @Temperature 121 °C
Shelf Life	9.00 Month @Temperature -40.0 °C

Descriptive Properties
Extractable Ionic Content (ppm)	20	Cured, Chloride (Cl-)
	5	Cured, Sodium (Na+)
	5	Cured, Potassium (K+)
Pot Life	24 hrs	Time required to double viscosity

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PLOCT5092 / 255303

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