Lord Adhesives Thermosetâ„¢ UR-340 Two Component Urethane Encapsulant

Category	Polymer , Adhesive , Thermoset , Polyurethane, TS , Thermoset Polyurethane, Adhesive
Manufacturer	Lord Adhesives
Trade Name	Thermoset™
Port	Ningbo port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	Lord Adhesives Thermosetâ„¢ UR-340 Two Component Urethane Encapsulant.pdf
Price	EMAIL US sales@lookpolymers.com
	Online Service lookpolymers 27660005

Material Notes:

Lord UR-340 is a two component, room temperature curing, urethane encapsulating compound. It is low in viscosity and has excellent flow characteristics. Its flexibility, low modulus characteristics, and very good electrical properties make it a good choice for encapsulating sensitive electronic components. UR-340 is often suitable in applications operating up to 130Â°C.All information provided by Lord.

Physical Properties	Metric	English	Comments
Specific Gravity	0.970 g/cc	0.970 g/cc	Resin; ASTM D1505
	1.00 g/cc	1.00 g/cc	Mixed; ASTM D1505
	1.02 g/cc	1.02 g/cc	Hardener; ASTM D1505
Water Absorption	0.21 % @Temperature 25.0 Â°C, Time 86400 sec	0.21 % @Temperature 77.0 Â°F, Time 24.0 hour	ASTM D570
Loss On Ignition	0.57 % @Temperature 125 Â°C, Time 605000 sec	0.57 % @Temperature 257 Â°F, Time 168 hour
Viscosity	90 - 130 cP @Temperature 25.0 Â°C	90 - 130 cP @Temperature 77.0 Â°F	Hardener; STM 1
	400 - 500 cP @Temperature 25.0 Â°C	400 - 500 cP @Temperature 77.0 Â°F	Mixed; STM 1
	900 - 1300 cP @Temperature 25.0 Â°C	900 - 1300 cP @Temperature 77.0 Â°F	Resin; STM 1

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	25 - 35	25 - 35	ASTM D2240
Tensile Strength, Yield	0.434 MPa	63.0 psi	ASTM D638
Elongation at Yield	68 %	68 %	ASTM D638

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	130 Â°C	266 Â°F
Glass Transition Temp, Tg	-46.0 Â°C	-50.8 Â°F	DMTA

Electrical Properties	Metric	English	Comments
Volume Resistivity	2.40e+11 ohm-cm	2.40e+11 ohm-cm	ASTM D257
Dielectric Constant	3.96 @Frequency 1.00e+6 Hz, Temperature 25.0 Â°C	3.96 @Frequency 1.00e+6 Hz, Temperature 77.0 Â°F	ASTM D150
Dielectric Strength	>= 19.7 kV/mm	>= 500 kV/in	ASTM D149
Dissipation Factor	0.11 @Frequency 1.00e+6 Hz, Temperature 25.0 Â°C	0.11 @Frequency 1.00e+6 Hz, Temperature 77.0 Â°F	ASTM D150

Processing Properties	Metric	English	Comments
Cure Time	120 - 240 min @Temperature 66.0 Â°C	2.00 - 4.00 hour @Temperature 151 Â°F
	1440 min @Temperature 25.0 Â°C	24.0 hour @Temperature 77.0 Â°F
Pot Life	20 min @Temperature 25.0 Â°C	20 min @Temperature 77.0 Â°F	Based on 100 gram mass
Gel Time	40.0 - 50.0 min @Temperature 25.0 Â°C	40.0 - 50.0 min @Temperature 77.0 Â°F	100 gram mass
Shelf Life	6.00 Month @Temperature 25.0 Â°C	6.00 Month @Temperature 77.0 Â°F

Descriptive Properties	Value	Comments
Appearance	Black	Resin
	Black	Mixed
	Light Amber	Hardener
Mix Ratio	1:1	by volume
	100:104	by weight

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