High-Strength PU Potting for LED & Automotive Lighting
Product Description
BZ-6803 is a two-component polyurethane encapsulant for insulation, sealing, and moisture protection of LED lamps, vehicle lighting, power controllers, and control boards. Its balanced flow and deep penetration ensure full coverage of complex parts, offering strong environmental resistance and mechanical integrity. RoHS/REACH-compliant and halogen-free, it operates from -40°C to 120°C, with tensile strength ≥8 MPa and water absorption ≤0.5% for long-term durability in automotive and outdoor use.
Key Product Features
- Color Customization: Available in white, black, or beige for design flexibility.
- Mechanical Strength: Shore A 72–88, tensile ≥8 MPa, elongation ≥50%, resists vibration and impact.
- Electrical Insulation: Resistivity ≥1.0×10¹³ Ω/sq/Ω·cm, breakdown voltage ≥16 kV/mm for reliable isolation.
- Processing Efficiency: 1:4 ratio, 24–40 min pot life; surface dry in 2–3 h, full cure in 4–6 h at 25°C (≤60 min at 60°C).
- Thermal Stability: Stable from -40°C to 120°C, enduring extreme cold and sustained heat.
- Global Compliance: Fully RoHS/REACH-compliant and halogen-free, meeting global standards.
Technical Parameters
|
Parameters
|
Hardener
BZ-6803 A
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Resin
BZ-6803 B
|
|
Before curing
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Appearance
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Light yellow/Brown clear liquid
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White/Black/Beige liquid
|
|
Viscosity(mPa·s.25℃)
|
60-260
|
2500-6000
|
|
Initial mixed viscosity(mPa·s.25℃)
|
850-1650
|
|
Density(g/cm³.25℃)
|
1.16±0.05
|
1.35±0.05
|
|
Mixing&Curing
|
Mix ratio(by weight)
|
A:B=1:4
|
|
Pot life 130±30g(min.25℃)
|
24-40
|
|
Curing condition
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Room temperature curing
|
|
Surface drying time 30g(H.25℃)
|
2-3
|
|
Curing time 30g(H.25℃)
|
4-6
|
|
Curing time(Heated)
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60℃ heated ≤60 min
|
|
After curing
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Color
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White/Black/Beige
|
|
Hardness (Shore A)
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72A-88A
|
|
Temperature resistance(℃)
|
-40~120℃
|
|
Flame retardancy UL94
|
HB-V2
|
|
Thermal conductivity(W/m.k)
|
≥0.40
|
|
Water absorption(24H)
|
≤0.5%
|
|
Surface resistivity(Ω/sq)
|
≥1.0×1013
|
|
Volume resistivity(Ω.cm)
|
≥1.0×1013
|
|
Tensile strength(MPa)
|
≥8
|
|
Elongation at break(%)
|
≥50%
|
|
Dielectric constant(at 50Hz)
|
≤7
|
|
Breakdown voltage(kV/mm)
|
≥16
|
Product Applications
- LED Lighting Drivers: Provides thermal management and fire safety for indoor/outdoor LED fixtures.
- Power Supply Units: Seals AC/DC power supplies, inverters, and chargers against moisture and dust.
- Home Appliance Control Boards: Insulates sensitive circuits in refrigerators, HVAC systems, and washing machines.
- Industrial Electronics: Protects PLCs, motor controllers, and sensors from vibration and chemical exposure.
- Custom Assemblies: Versatile sealing for medical devices, automotive electronics, and IoT sensors with strict safety requirements.
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.
