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	Metric	English	Comments

Density	0.960 g/cc	0.0347 lb/in³	TA4820B
	0.970 g/cc	0.0350 lb/in³	TA4820A
Viscosity	40000 - 60000 cP @Temperature 25.0 °C	40000 - 60000 cP @Temperature 77.0 °F	TA4820A
	40000 - 60000 cP @Temperature 25.0 °C	40000 - 60000 cP @Temperature 77.0 °F	TA4820B
	90000 - 100000 cP @Temperature 25.0 °C	90000 - 100000 cP @Temperature 77.0 °F	Mixed Viscosity
Storage Temperature	5.00 - 25.0 °C	41.0 - 77.0 °F

Mechanical Properties	Metric	English	Comments
Tensile Strength	28.938 MPa	4197.1 psi	DIN 53283
Elongation at Break	15 - 20 %	15 - 20 %
Adhesive Bond Strength	>= 11.7 MPa	>= 1700 psi	Fiber Glass, Shear; ASTM D1002
	20.67 - 27.56 MPa	2998 - 3997 psi	Aluminum, Shear; ASTM D1002
	24.1 - 31.0 MPa	3500 - 4500 psi	Steel, Shear; ASTM D1002
Peel Strength	2.625 - 3.50 kN/m	14.98 - 20.0 pli

Electrical Properties	Metric	English	Comments
Volume Resistivity	2.00e+13 ohm-cm	2.00e+13 ohm-cm	ASTM D257
Dielectric Constant	4.6 @Frequency 1e+7 Hz	4.6 @Frequency 1e+7 Hz	ASTM D150
Dielectric Strength	30.0 - 50.0 kV/mm	762 - 1270 kV/in	ASTM D149

Thermal Properties	Metric	English	Comments
CTE, linear	80.0 µm/m-°C	44.4 µin/in-°F	ASTM D696
Thermal Conductivity	0.100 W/m-K	0.694 BTU-in/hr-ft²-°F	ASTM C177

Processing Properties	Metric	English	Comments
Cure Time	15.0 - 18.0 min	0.250 - 0.300 hour	working strength
	30.0 - 35.0 min	0.500 - 0.583 hour	fixture time
	1440 min	24.0 hour	full cure
Shelf Life	6.00 Month	6.00 Month
	12.0 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

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.

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PPERMA923 / 162789

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