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Master Bond adhesives
Lord Adhesives Thermoset™ UR312 / UR324 Urethane Encapsulating Gel
Categories: Polymer; Adhesive; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Adhesive

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.

Available Properties
  • Specific Gravity, STM 2, UR312
  • Specific Gravity, STM 2, UR324
  • Water Absorption, ASTM D570, UR312
  • Water Absorption, ASTM D570, UR324
  • Loss On Ignition, UR324
  • Loss On Ignition, UR312
  • Viscosity, STM 1, UR312; Hardener
  • Viscosity, STM 1, UR324; Hardener
  • Viscosity, STM 1, UR324; Mixed
  • Viscosity, STM 1, UR312; Mixed
  • Viscosity, STM 1, UR324; Resin
  • Viscosity, STM 1, UR312; Resin
  • Hardness, Shore A, UR324
  • Hardness, Shore OO, UR312
  • Tensile Strength, Yield, ASTM D638, UR312
  • Tensile Strength, Yield, ASTM D638, UR324
  • Elongation at Yield, ASTM D638, UR312
  • Elongation at Yield, ASTM D638, UR324
  • Volume Resistivity, ASTM D257, UR312
  • Volume Resistivity, ASTM D257, UR324
  • Dielectric Constant, ASTM D150, UR312
  • Dielectric Constant, ASTM D150, UR312
  • Dielectric Constant, ASTM D150, UR324
  • Dielectric Constant, ASTM D150, UR312
  • Dissipation Factor, ASTM D150, UR312
  • Dissipation Factor, ASTM D150, UR324
  • Dissipation Factor, ASTM D150, UR312
  • Dissipation Factor, ASTM D150, UR312
  • Cure Time, UR312
  • Cure Time, UR324
  • Cure Time, UR312
  • Cure Time, UR324
  • Pot Life, UR312
  • Pot Life, UR324
  • Shelf Life
Property Data

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