Fast-Cure Polyurethane Potting Compound for High-Efficiency Power Electronics Production
BZ-6806-6-3R – a two-component polyurethane encapsulant designed for rapid insulation, sealing, and moisture protection in power supplies, industrial controllers, power tool PCBs, and EV converters. With UL94 V-0 rating, fast cure, and improved thermal conductivity, it boosts throughput and meets rigorous safety norms. RoHS-compliant, it performs reliably from -40°C to 120°C, with water absorption ≤0.5% for enduring high-power use.
Key Product Features
- UL94 V-0 certified: effectively curbs flame spread in critical assemblies.
- Rapid turnaround: cures in 2–6 hrs at 25°C, or ≤20 min at 60°C, suiting mass production.
- Simple 1:5 weight ratio: cuts waste, works with automated dispensers.
- Thermal conductivity ≥0.50 W/m·k: dissipates heat to enhance component longevity.
- High insulation strength: breakdown voltage ≥15 kV/mm, surface resistivity ≥1.0×10¹¹ Ω/sq.
- Balanced flexibility: Shore A 73±10, absorbs vibration and thermal stress.
- Globally compliant: meets RoHS and UL94 V-0, easing international market entry.
Technical Parameters
|
Parameters
|
Hardener
BZ-6806-6-3R A
|
Resin
BZ-6806-6-3R B
|
|
Before curing
|
Appearance
|
Brown liquid
|
Black liquid
|
|
Viscosity(mPa·s.25℃)
|
400±150
|
12000±5000
|
|
Initial mixed viscosity(mPa·s.25℃)
|
2800±800
|
|
Density(g/cm³.25℃)
|
1.20±0.05
|
1.65±0.05
|
|
Mixing
&
Curing
|
Mix ratio(by weight)
|
A:B=1:5
|
|
Pot life 130±30g(min.25℃)
|
10-60
(Adjustable for process/temperature )
|
|
Curing condition
|
Room temperature curing
|
|
Surface drying time 30g(H.25℃)
|
0.5-2
(Adjustable for process/temperature )
|
|
Curing time 30g(H.25℃)
|
2-6
(Adjustable for process/temperature )
|
|
Curing time(Heated)
|
60℃ heated ≤20 min
|
|
After curing
|
Color
|
Black
|
|
Hardness (Shore A)
|
73±10
|
|
Temperature resistance(℃)
|
-40~120℃
|
|
Flame retardancy UL94
|
V0
|
|
Thermal conductivity(W/m.k)
|
≥0.50
|
|
Water absorption(24H)
|
≤0.5%
|
|
Surface resistivity(Ω/sq)
|
≥1.0×1011
|
|
Volume resistivity(Ω.cm)
|
≥1.0×1010
|
|
Tensile strength(MPa)
|
≥2
|
|
Dielectric constant(at 50Hz)
|
≥4
|
|
Breakdown voltage(kV/mm)
|
≥15
|
Product Applications
- High-Volume Power Supplies: Encapsulates consumer electronics chargers, industrial power inverters, and server power units, supporting rapid production lines.
- New Energy Vehicle Components: Insulates battery management systems (BMS), on-board chargers, and DC-DC converters, withstanding extreme temperature fluctuations and mechanical vibration.
- Industrial Controllers: Seals PLCs, motor drives, and power tool control boards, protecting against dust, moisture, and harsh manufacturing environments.
- Renewable Energy Systems: Protects solar inverters and wind turbine controllers, ensuring long-term reliability in outdoor installations with fire safety requirements.
- Telecommunications Infrastructure: Encapsulates base station power modules and signal processing units, enhancing durability in enclosed telecom cabinets.
Directions for Use
- Pre-potting Preparation: Calibrate scales, prepare potting tools, cleaning tools, check machine settings, check vacuum pump force, etc.
- Product Pre-treatment: Place product on a level surface or fixture. Remove dust, clean, degrease, and dry if necessary.
- Accurate Proportioning: Manual operation requires precise mixing according to the specified ratio and recording. Machine potting requires calibrated ratios and first-article confirmation is recommended.
- Mixing & Stirring: Manual operation requires thorough stirring or using electric stirrers to ensure homogeneous mixing. Machine potting requires sufficient stirring speed, adjust as needed.
- Uniform Potting: Manual operation should be done in small, multiple batches to ensure uniformity. Machine potting should follow the programmed path for quantitative dispensing.
- Inspection or Secondary Potting: After potting, visually inspect as needed. Perform touch-up, bubble removal, or secondary potting if required.
- Curing: Allow the potted and inspected products to cure at room temperature or with heat assistance (recommended 60°C if needed), according to product and process requirements.
- Final Product Confirmation: Perform visual inspection and performance testing as required by the customer.
Packing & Shipping & Storage
- Hardener: Typically 5KG/10KG/25KG/200KG metal or plastic drums.
- Resin: Typically 25KG/200KG metal or plastic drums.
- Store and transport as a general chemical product.
- Store sealed, protected from light at room temperature. Shelf life varies from 6 to 12 months depending on packaging; please refer to the expiry date on the shipping package.
- When temperature drops to 15°C or lower, the hardener or resin should be stored in a warm place or heated before use for potting. Specific heating recommendations depend on the temperature drop; please communicate and consult with us.
