DuPont Duroptix OE-6370 M A/B Kit Optically Clear Two-Part Silicone LED Encapsulant for SMD LED Package & Dispensing Process
DuPont Duroptix OE-6370 M A/B Kit Optically Clear Two-Part Silicone LED Encapsulant for SMD LED Package & Dispensing Process
DuPont Duroptix™ OE-6370 M is a two-part, 1:1 mix ratio, addition-cure optically clear silicone elastomer (Base/Catalyst), colorless, with moderate mixed viscosity ~3308 cP and heat cure 240 min @150°C, cured to Shore A 71.
Designed for the LED market, OE-6370 M offers high transparency (>99.9% @450nm, 1mm), thermal stability, moisture resistance and unprimed adhesion to LED substrates such as Ag-plated lead frames and PPA. The silicone absorbs thermally induced stresses inside the LED package, protecting the die and bond wires, and withstands lead-free reflow temperatures. It is optimized for pneumatic dispensing processes.
Technical Specifications
| Property | Unit | Value |
|---|---|---|
| One or Two-Part | — | Two |
| Mix Ratio (by weight or volume) | — | 1 : 1 |
| Color (Uncured / Cured) | — | Clear / Clear |
| Viscosity (Part A / Base) | cP (mPa·s) | 5848 |
| Viscosity (Part B / Catalyst) | cP (mPa·s) | 2000 |
| Viscosity (Mixed) | cP (mPa·s) | 3308 |
| Scorch Time @ 150°C | s | 154 |
| Heat Cure Time @ 150°C | min | 240 |
| Durometer Shore A | — | 71 |
| Unprimed Adhesion – Die Shear (Al) | MPa (psi) | 7.0 (1008) |
| Tensile Strength | MPa | 9.2 |
| Elongation | % | 80 |
| CTE (Coefficient of Thermal Expansion) | ppm/°C | 290 |
| Impurity Na⁺ | ppm | 0.1 |
| Impurity K⁺ | ppm | 0.2 |
| Impurity Cl⁻ | ppm | 0.5 |
| Transparency @ 450 nm, 1 mm thick | % | 99.9 |
| Refractive Index | — | 1.41 |
Key Special Properties (Expanded)
- Optimized for Pneumatic Dispensing: Moderate viscosity (Part A 5848 cP / Part B 2000 cP / Mixed 3308 cP) ensures smooth flow in automated dispensing equipment with long pot life.
- High Purity & Strong Adhesion: Na⁺ ≤0.1 ppm, K⁺ ≤0.2 ppm, Cl⁻ ≤0.5 ppm; Unprimed die shear adhesion to Al substrate 1008 psi (7.0 MPa).
- Excellent Mechanical & Optical: Tensile Strength 9.2 MPa, Elongation 80%, Refractive Index 1.41, Transparency @450nm 99.9%.
- Wide Operating Range: Long-term service temperature –45°C to 200°C; CTE 290 ppm/°C.
OE-6370 M is typically used for encapsulation and protection of SMD (Surface Mount Device) LEDs, high-power multi-chip LED packages, and molded lens formation where dispensing process is preferred. It is also suitable for optical component potting requiring high clarity and stress relief in semiconductor/optoelectronic devices.
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