3M 280#绝缘树脂胶Scotchcast Electrical Resin
3M™ Scotchcast™ Electrical Resin 280 is characterizedby a high temperature rating, outstanding physical and
electrical stability and superior resistance to moisture.
The Scotchcast Resin 280 system remains flexible evenafter prolonged heat aging, while its low viscosity and
fine wetting properties allow complete impregnation of fine wires in coils. Scotchcast Resin 280 is well suited
to impregnating, potting and encapsulating applications that require superior electrical performance, maximum
resistance to moisture and thermal shock resistance.
These include impregnation and encapsulation of coils,transformers, strain-sensitive circuitry, modules and other
electrical and electronic components. Scotchcast Resin 280can be cured at 65°C (150°F) and still exhibit excellent
electrical properties in applications where components require low temperature cures.
• High temperature rated (155°C)
• Thermal shock resistant
• Physically and electrically stable
Mix the separate parts before removing them from their containers. They may be warmed to 60ºC (140ºF) to aid
mixing. Weigh the correct proportions of the separate parts to within 2% accuracy and combine them. Thoroughly
blend the mixture until the color is absolutely uniform, or until a homogeneous mixture is attained.
Entrained air can be removed by evacuating for 5 to 15 minutes at 5 to 10 mm of mercury absolute pressure.
Warming the resin to 60°C (140°F) facilitates this process. Container side walls should be four times the height of
liquid resin to contain the foaming that takes place under vacuum.
Casting and Impregnating
Pour the warm resin into the preheated 100°C mold. If no mold is used, dip the preheated part into the resin. Heating
the resin and mold aids impregnation. For maximum impregnation, evacuate for 5 to 15 minutes at 5 mm of
mercury absolute pressure, or pour under vacuum and hold for several minutes before releasing.
Where minimum stress and maximum thermal shock resistance are required, the lower temperature cure cycle
is recommended. (See "Curing Guide" of Handling Properties section.) Time should be added to the cure
cycle to allow the resin to reach the curing temperature.
Both parts of this resin system should be stored at temperatures between 20 to 30 degrees Celsius, and 30% to 60%
relative humidity. When not in use, containers should be kept tightly closed. Storage at conditions outside those suggested
may compromise the performance of the resin.
Handling and Safety Precautions
Read all Health Hazard, Precautionary and First Aid statements found in the Material Safety Data Sheets
(MSDS) and/or product label of chemicals prior to handling or use.