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Lord Adhesives Thermosetâ„¢ UR312 / UR324 Urethane Encapsulating Gel

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„¢ UR312 / UR324 Urethane Encapsulating Gel.pdf
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Material Notes:
UR312 A/B and UR324 A/B are the same components used at different mix ratios, therefore, giving different properties.LORD UR312 and UR324 are two-component, room temperature curing urethane gels. The cured elastomer is soft, flexible and has a very low modulus at temperatures down to -80°C. Cured UR312 and UR324 also have excellent thermal shock resistance, electrical properties, and adhesion to a variety of materials. The hydrophobic nature of this resin system imparts exceptional hydrolytic stability to the cured resin.LORD UR312 and UR324 are soft, jelly-like, but non-flowable, materials that have tenacious, pressure-sensitive adhesion to most substances.The low modulus over a wide temperature range makes UR312 and UR324 ideal materials for encapsulating fragile, pressure sensitive, microelectronic components which would be damaged by more rigid encapsulants during cure or later thermal cycling. LORD UR312 and UR324 are generally suitable in applications exposed up to 130°C. Lord microelectronic grade silicones are suggested for encapsulating delicate components that operate at higher temperatures. Either cures very well at room temperature, or the cure may be accelerated by using moderately elevated temperatures.All information provided by Lord.
Physical Properties Metric English Comments
Specific Gravity 0.937 g/cc
0.937 g/cc
UR312; STM 2
0.950 g/cc
0.950 g/cc
UR324; STM 2
Water Absorption 0.29 %

@Temperature 25.0 °C,
Time 605000 sec
0.29 %

@Temperature 77.0 °F,
Time 168 hour
UR312; ASTM D570
0.30 %

@Temperature 25.0 °C,
Time 605000 sec
0.30 %

@Temperature 77.0 °F,
Time 168 hour
UR324; ASTM D570
Loss On Ignition 0.24 %

@Temperature 100 °C,
Time 86400 sec
0.24 %

@Temperature 212 °F,
Time 24.0 hour
UR324
0.56 %

@Temperature 130 °C,
Time 605000 sec
0.56 %

@Temperature 266 °F,
Time 168 hour
UR312
Viscosity 75 cP

@Temperature 25.0 °C
75 cP

@Temperature 77.0 °F
UR312; Hardener; STM 1
75 cP

@Temperature 25.0 °C
75 cP

@Temperature 77.0 °F
UR324; Hardener; STM 1
750 cP

@Temperature 25.0 °C
750 cP

@Temperature 77.0 °F
UR324; Mixed; STM 1
1500 cP

@Temperature 25.0 °C
1500 cP

@Temperature 77.0 °F
UR312; Mixed; STM 1
3750 cP

@Temperature 25.0 °C
3750 cP

@Temperature 77.0 °F
UR324; Resin; STM 1
3750 cP

@Temperature 25.0 °C
3750 cP

@Temperature 77.0 °F
UR312; Resin; STM 1
Mechanical Properties Metric English Comments
Hardness, Shore A 20
20
UR324
Hardness, Shore OO 50
50
UR312
Tensile Strength, Yield 0.345 MPa
50.0 psi
UR312; ASTM D638
0.689 MPa
100 psi
UR324; ASTM D638
Elongation at Yield 250 %
250 %
UR312; ASTM D638
250 %
250 %
UR324; ASTM D638
Electrical Properties Metric English Comments
Volume Resistivity 1.15e+16 ohm-cm

@Temperature 25.0 °C
1.15e+16 ohm-cm

@Temperature 77.0 °F
UR312; ASTM D257
2.00e+16 ohm-cm

@Temperature 25.0 °C
2.00e+16 ohm-cm

@Temperature 77.0 °F
UR324; ASTM D257
Dielectric Constant 3.18

@Frequency 1.00e+6 Hz,
Temperature -40.0 °C
3.18

@Frequency 1.00e+6 Hz,
Temperature -40.0 °F
UR312; ASTM D150
3.5

@Frequency 1.00e+6 Hz,
Temperature 140 °C
3.5

@Frequency 1.00e+6 Hz,
Temperature 284 °F
UR312; ASTM D150
3.52

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
3.52

@Frequency 1.00e+6 Hz,
Temperature 77.0 °F
UR324; ASTM D150
3.58

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
3.58

@Frequency 1.00e+6 Hz,
Temperature 77.0 °F
UR312; ASTM D150
Dissipation Factor 0.0050

@Frequency 1.00e+6 Hz,
Temperature 140 °C
0.0050

@Frequency 1.00e+6 Hz,
Temperature 284 °F
UR312; ASTM D150
0.020

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
0.020

@Frequency 1.00e+6 Hz,
Temperature 77.0 °F
UR324; ASTM D150
0.032

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
0.032

@Frequency 1.00e+6 Hz,
Temperature 77.0 °F
UR312; ASTM D150
0.070

@Frequency 1.00e+6 Hz,
Temperature -40.0 °C
0.070

@Frequency 1.00e+6 Hz,
Temperature -40.0 °F
UR312; ASTM D150
Processing Properties Metric English Comments
Cure Time 10100 min

@Temperature 25.0 °C
168 hour

@Temperature 77.0 °F
UR312
10100 min

@Temperature 25.0 °C
168 hour

@Temperature 77.0 °F
UR324
20200 min

@Temperature 85.0 °C
336 hour

@Temperature 185 °F
UR312
20200 min

@Temperature 85.0 °C
336 hour

@Temperature 185 °F
UR324
Pot Life 20 min

@Temperature 25.0 °C
20 min

@Temperature 77.0 °F
UR312
20 min

@Temperature 25.0 °C
20 min

@Temperature 77.0 °F
UR324
Shelf Life 6.00 Month

@Temperature 25.0 °C
6.00 Month

@Temperature 77.0 °F
Descriptive Properties Value Comments
Appearance Clear
UR312
Clear
UR324
Mix Ratio 1:1
UR324, by volume
100:108
UR324, by weight
100:50
UR312, by volume
100:55
UR312, by weight
Thermal Shock Excellent
UR312
Excellent
UR324
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