Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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• Item Name: 3M™ Scotch-Weld™ Epoxy Adhesive DP125 Translucent and Gray
• Manufacturer: 3M
• Technologies: Two-part epoxy adhesive; faster cure than 2216 B/A; Duo-Pak cartridge or bulk mixing; controlled flow
• Color: Translucent/Amber (Base & Accelerator); Gray/Amber (DP125 Gray)
• Cure Type: Room temperature cure (7 days full cure at 75°F / 24°C); heat accelerates cure to 200°F (93°C)
• Package Size: Duo-Pak cartridges (48.5–50 ml); bulk containers
• Shelf Life: 24 months unopened
3M™ Scotch-Weld™ Epoxy Adhesive DP125 (Translucent and Gray) is a fast-curing two-part epoxy adhesive, derived from the DP2216 Translucent B/A, but with significantly reduced worklife and cure time. The DP125 Gray version is a filled, pigmented variant with similar performance and flexibility. It features a 25-minute worklife, high peel and shear strength, controlled flow, and flexibility. Available in Duo-Pak cartridges or bulk containers.
Structural bonding of metals, plastics, rubbers, wood, and glass
High-strength applications requiring fast cure time and flexible bonds
Industrial bonding where controlled flow and high peel/shear strength are required
Applications using 3M™ EPX Applicator System or bulk mixing for production/field use
Note: Surface preparation is critical for optimal bond strength. Performance may vary under prolonged humidity, heat, or immersion; testing is recommended.
| Property | DP125 Translucent | DP125 Gray |
|---|---|---|
| Base Resin | Epoxy/Amine | Epoxy/Amine |
| Viscosity Base (cps @ 80°F) | 2,000–8,000 | 35,000–75,000 |
| Viscosity Accelerator (cps @ 80°F) | 22,000–33,000 | 45,000–65,000 |
| Net Weight Base (lbs/gal) | 9.3–9.7 | 10.3–10.7 |
| Net Weight Accelerator (lbs/gal) | 8.4–8.6 | 8.5–8.9 |
| Color Base | Clear | Gray |
| Color Accelerator | Amber | Amber |
| Mix Ratio Volume | 1:1 | 1:1 |
| Mix Ratio Weight | 1.1:1 | 1.2:1 |
| Worklife @ 73°F (2–20 g) | 25 min / 18 min | 25 min / 15 min |
| Property | DP125 Translucent | DP125 Gray |
|---|---|---|
| Color | Translucent | Gray |
| Shore D Hardness | 55 | 70 |
| Tack-Free Time | ≈ 2 hrs | ≈ 2 hrs |
| Handling Strength | ≈ 2.5 hrs | ≈ 2.5 hrs |
| Full Cure Time | 7 days | 7 days |
| Elongation | 150% | 120% |
| Tensile Strength | 2,500 psi | 3,300 psi |
| Thermal Coefficient of Expansion (TCE, 10⁻⁶/°C) | Below Tg: 112, Above Tg: 190 | Below Tg: 98, Above Tg: 187 |
| Glass Transition Temperature (Tg) | Onset: 3°C, Mid: 15°C | Onset: 12°C, Mid: 23°C |
| Thermal Conductivity (BTU·ft/ft²·hr·°F) | 0.089 | 0.087 |
| Thermal Shock Resistance | Pass 5 cycles (+100°C to -50°C) | Pass 5 cycles (+100°C to -50°C) |
| Dielectric Constant @ 1 kHz | 6.3 | 6.3 |
| Dissipation Factor @ 1 kHz | 0.14 | 0.13 |
| Dielectric Strength (volts/mil) | 765 | 680 |
| Volume Resistivity (ohm·cm) | 1.2 × 10¹¹ | 1.0 × 10¹¹ |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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