3M 282
Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide
Main features
- Thixotropic Low-Sag Application
- Multi-Method Resin Placement
- Semiflexible Class F Performance
Product Description
3M Scotchcast Electrical Resin 282 is a two-part, oven-curing, thixotropic epoxy liquid resin for coating, filling, patching, insulating, and encapsulating electrical components. The stated component ratio is 2:3 by weight and 37:63 by volume. Once combined, the material retains thixotropic flow for dipping, spraying, extruding, or troweling with minimal run-off or sag during cure. Typical pot life is 3 to 4 days at 23 deg C, with 23-minute gel time at 121 deg C. The cured semiflexible Class F resin provides 65 Shore D hardness, 45% elongation, and thermal-shock resistance for coils, transformers, motors, modules, and strain-sensitive circuitry.
Key features
- Thixotropic low-sag handling: The mixed resin limits run-off and sag during supported coating and cure operations.
- Multiple application methods: The material can be applied by dipping, spraying, extruding, or troweling.
- Semiflexible Class F cure: Typical cured properties include 65 Shore D hardness, 45% elongation, and a 155 deg C temperature rating.
Applications
Applications include dipping, coating, filling, patching, insulating, and encapsulating coils, transformers, motors, modules, strain-sensitive circuitry, and other electrical or electronic components.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Mechanical Properties
Other Properties
Additional Information
As-supplied / before-processing properties
Handling values are typical; component values and mix-ratio bases remain separated.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Mix ratio by weight (A:B) | 2:3 | - | Before processing |
| Mix ratio by volume (A:B) | 37:63 | % | Before processing |
| Rheology | Thixotropic | - | Parts A and B and mixed resin at 23 deg C |
| Density (A / B) | 1.50 / 1.32 | kg/L | Typical |
| Flash point (A / B) | 202 / 188 | deg C | Typical |
| Gel time | 23 | min | Typical at 121 deg C |
| Cure guide | 15 to 20 h / 6 to 8 h / 2 to 3 h | - | 75 deg C / 95 deg C / 120 deg C |
| Pot life | 3 to 4 | days | Typical at 23 deg C |
| Color | Buff | - | Typical |
Final-state / after-processing properties
Cured values are typical and are not specification limits.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Hardness | 65 | Shore D | Typical |
| Specific gravity | 1.43 | - | Typical; cured |
| Compressive strength | 3,500 | psi | Typical; 10% compression |
| Tensile strength | 2,100 | psi | Typical |
| Elongation at break | 45 | % | Typical |
| Electric strength | 375 (14.8) | V/mil (kV/mm) | Typical; 1/8 in (3.175 mm) sample |
| Thermal-shock result | Pass | - | 10 cycles from -65 to 130 deg C; 1/4 in (3.175 mm) Olyphant insert |
| Moisture absorption | 0.32 | % weight increase | Typical; 240 h at 96% RH |
| Volume resistivity | >1 x 10^15 | ohm-cm | Typical at 23 deg C |
