Permabond TA4820 Structural Acrylic Adhesive

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Permabond TA4820 Structural Acrylic Adhesive
Categories:	Polymer; Adhesive; Thermoset; Acrylic/Cyanoacrylate Adhesive
Material Notes:	PERMABOND TA4820 is a 2-part, 1:1 toughened methacrylate adhesive designed for bonding thermoplastics, thermosets, metals and composites. TA4820 has excellent adhesion to as received metal surfaces forming high strength bonds without surface preparation. It provides excellent durability and resistance to many common industrial solvents, fuels as well as environmental conditions. It cures rapidly at room temperature and has very good thixotropic properties allowing for easy dispensing through static mixers while maintaining good gap filling and non-sag properties. The long fixture time allows for accurate alignment of large components. Features & Benefits: Adhesion to a wide variety of substrates Fast cure at room temperature High shear and peel strength Good impact strength Good chemical resistance Information provided by Permabond.
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Physical Properties	Original Value	Comments

Density	0.960 g/cc	TA4820B
	0.970 g/cc	TA4820A
Viscosity	40000 - 60000 cP @Temperature 25.0 °C	TA4820A
	40000 - 60000 cP @Temperature 25.0 °C	TA4820B
	90000 - 100000 cP @Temperature 25.0 °C	Mixed Viscosity
Storage Temperature	5.00 - 25.0 °C

Mechanical Properties	Original Value	Comments
Tensile Strength	28.938 MPa	DIN 53283
Elongation at Break	15 - 20 %
Adhesive Bond Strength	>= 11.7 MPa	Fiber Glass, Shear; ASTM D1002
	20.67 - 27.56 MPa	Aluminum, Shear; ASTM D1002
	24.1 - 31.0 MPa	Steel, Shear; ASTM D1002
Peel Strength	2.625 - 3.50 kN/m

Electrical Properties	Original Value	Comments
Volume Resistivity	2.00e+13 ohm-cm	ASTM D257
Dielectric Constant	4.6 @Frequency 1e+7 Hz	ASTM D150
Dielectric Strength	30.0 - 50.0 kV/mm	ASTM D149

Thermal Properties	Original Value	Comments
CTE, linear	80.0 µm/m-°C	ASTM D696
Thermal Conductivity	0.100 W/m-K	ASTM C177

Processing Properties	Original Value	Comments
Cure Time	0.250 - 0.300 hour	working strength
	0.500 - 0.583 hour	fixture time
	24.0 hour	full cure
Shelf Life	6.00 Month
	12.0 Month	refrigerated

Descriptive Properties
Appearance	Amber, TA4820B	Uncured
	Off-white, TA4820A	Uncured
Maximum Gap Fill (mm)	2
Strength Retention	10% at 200°C	Relative to 0°C
	100% at 0°C	Relative to 0°C
	30% at 150°C	Relative to 0°C
	70% at 100°C	Relative to 0°C
	96% at 50°C	Relative to 0°C

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PPERMA923 / 162789

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