Ultra-Fast Curing Polyurethane Potting Compound For Solar & Automotive Electronics
Product Description
BZ-6803-2-K is a high-performance two-component polyurethane potting compound designed for insulation, sealing, and moisture-proof protection of solar charge controllers, street light controllers, and automotive electronic components. With exceptional fluidity and deep penetration, it fully encapsulates sensitive circuits, providing robust defense against environmental stressors while maintaining mechanical resilience. Compliant with RoHS/REACH regulations and halogen-free, this formula delivers reliable performance across -40℃ to 120℃, featuring high tensile strength (≥8 MPa) and low water absorption (≤0.5%) for long-term stability in outdoor and automotive applications.
Key Product Features
- Ultra-Fast Curing: Surface dry in 1-2 hours, full cure in 2-3 hours at 25℃; 0.5-1 hour at 60℃, ideal for high-volume production lines.
- High Mechanical Flexibility: Shore A 86±10 hardness with ≥80% elongation at break, absorbing vibration and thermal expansion in automotive systems.
- Superior Electrical Insulation: Surface/volume resistivity ≥1.0×10¹³ Ω/sq/Ω·cm and breakdown voltage ≥16 kV/mm ensure reliable component isolation.
- Efficient Processing: 1:4 mix ratio with 15±5 minute pot life, balancing workability and production speed for automated/manual operations.
- Wide Temperature Stability: Operates reliably from -40℃ to 120℃, withstanding extreme cold in outdoor solar systems and continuous heat in automotive environments.
- Global Compliance: RoHS/REACH compliant with halogen-free formulation, meeting international manufacturing standards.
Technical Parameters
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Parameters
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Hardener
BZ-6803-2-K A
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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
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Black liquid
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Viscosity(mPa·s.25℃)
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140-260
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4800-8600
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Initial mixed viscosity(mPa·s.25℃)
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1700±500
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Density(g/cm³.25℃)
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1.16±0.05
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1.49±0.05
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Mixing&Curing
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Mix ratio(by weight)
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A:B=1:4
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Pot life 130±30g(min.25℃)
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15±5
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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
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Curing time 30g(H.25℃)
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2-3
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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
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Hardness (Shore A)
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86±10
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Temperature resistance(℃)
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-40~120℃
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Flame retardancy UL94
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V2
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Thermal conductivity(W/m.k)
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≥0.40
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Water absorption(24H)
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≤0.5%
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Surface resistivity(Ω/sq)
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≥1.0×1013
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|
Volume resistivity(Ω.cm)
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≥1.0×1013
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Tensile strength(MPa)
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≥8
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Elongation at break(%)
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≥80%
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Dielectric constant(at 50Hz)
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≤7
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Breakdown voltage(kV/mm)
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≥16
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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 & 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.
