Ultra-Fast Curing Polyurethane Potting for Solar & Automotive Electronics
Product Description
BZ-6803-2-K is a two-component polyurethane potting compound formulated for insulation, sealing, and moisture protection of solar charge controllers, streetlight controllers, and automotive electronics. Its superior flow and deep penetration fully encapsulate sensitive circuits, defending against environmental stress while retaining mechanical resilience. RoHS/REACH-compliant and halogen-free, it performs reliably from -40℃ to 120℃, with tensile strength ≥8 MPa and water absorption ≤0.5% for long-term outdoor and automotive durability.
Key Product Features
- Ultra-Fast Curing: Surface dry in 1–2 hrs, full cure in 2–3 hrs at 25℃; or 0.5–1 hr at 60℃, boosting high-volume throughput.
- High Flexibility: Shore A 86±10 hardness with elongation ≥80% at break, absorbing vibration and thermal expansion.
- Strong Insulation: Surface/volume resistivity ≥1.0×10¹³ Ω/sq/Ω·cm; breakdown voltage ≥16 kV/mm for secure isolation.
- Easy Processing: 1:4 mix ratio with 15±5 min pot life, suited for both automated and manual operations.
- Broad Thermal Range: Stable from -40℃ to 120℃, enduring solar outdoor cold and automotive under-hood heat.
- Global Standards: Meets RoHS, REACH, and halogen-free requirements for international manufacturing compliance.
Technical Parameters
|
Parameters
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Hardener
BZ-6803-2-K A
|
Resin
BZ-6803-2-K B
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Before curing
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Appearance
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Light yellow clear liquid
|
Black liquid
|
|
Viscosity(mPa·s.25℃)
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140-260
|
4800-8600
|
|
Initial mixed viscosity(mPa·s.25℃)
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1700±500
|
|
Density(g/cm³.25℃)
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1.16±0.05
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1.49±0.05
|
|
Mixing&Curing
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Mix ratio(by weight)
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A:B=1:4
|
|
Pot life 130±30g(min.25℃)
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15±5
|
|
Curing condition
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Room temperature curing
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|
Surface drying time 30g(H.25℃)
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1-2
|
|
Curing time 30g(H.25℃)
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2-3
|
|
Curing time(Heated)
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60℃ heated 0.5-1H
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|
After curing
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Color
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Black
|
|
Hardness (Shore A)
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86±10
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|
Temperature resistance(℃)
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-40~120℃
|
|
Flame retardancy UL94
|
V2
|
|
Thermal conductivity(W/m.k)
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≥0.40
|
|
Water absorption(24H)
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≤0.5%
|
|
Surface resistivity(Ω/sq)
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≥1.0×1013
|
|
Volume resistivity(Ω.cm)
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≥1.0×1013
|
|
Tensile strength(MPa)
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≥8
|
|
Elongation at break(%)
|
≥80%
|
|
Dielectric constant(at 50Hz)
|
≤7
|
|
Breakdown voltage(kV/mm)
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≥16
|
Product Applications
- Solar Charge Controllers: Encapsulates photovoltaic system controllers, protecting against moisture, dust, and temperature fluctuations in outdoor installations.
- Street Light Controllers: Seals LED street light drivers and control circuits, ensuring year-round performance in harsh urban and rural environments.
- Automotive Electronics: Protects engine control units (ECUs), sensor modules, and battery management systems from vibration and road conditions.
- Industrial Power Supplies: Insulates high-density power converters and inverters, enhancing reliability in manufacturing and renewable energy systems.
- Outdoor IoT Devices: Provides environmental sealing for smart city sensors, weather stations, and remote monitoring equipment in extreme climates.
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
- Hardener: Typically 5KG/10KG/25KG/200KG metal or plastic drums.
- Resin: Typically 25KG/200KG metal or plastic drums.
