Lord UR-322 is a two component, room temperature curing urethane potting compound. The cured elastomer is soft, flexible and has a very low modulus at temperatures down to -80°C. Cured UR-322 also has 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.
The low modulus over a wide temperature range makes this an ideal material for potting fragile, pressure sensitive components. Lord UR-322 gels very quickly at normal room temperature but full properties take several days to develop at 25°C. Shelf life is six months when stored at 25°C in original, unopened container.
Uncured Typical Properties**
Material Safety Data Sheet (MSDS): Resin
Mixed Appearance: Clear
Mixed Viscosity, cps @ 25°C: 750
Mixed Specific Gravity: 0.95
Working Life, min @ 25°C: 4-5
Cured Typical Properties**
Volume Resistivity, ohm-cm @ 25°C: 2 x 1016
Glass Transition Temperature (Tg), °C: -72
Hardness, Shore A: 12
Tensile Strength, psi: 100
Elongation at Break, %: > 250
Moisture Absorption, %, 168 hours @ 25C: 030
Dielectric Constant, @ 25°C: 3.10
Dissipation Factor, @ 25°C: 0.20
Technical Data Sheet: Click Here
*Actual product colours may vary from on-screen and printed representations.
**Data is typical and not to be used for specification purposes.