Flexibility And Low Stress Transparent PU Potting Compound For Automotive
BZ-708-5-2 is a transparent, flexible, and highly adhesive two-component polyurethane potting compound. It features excellent processing performance and rapid curing speed, making it ideal for waterproofing automotive tire pressure monitoring modules, sensors, and LED modules.
Key Product Features
- Two-component polyurethane with convenient process operation and moderate fluidity.
- Complies with ROHS.
- The material exhibits excellent flexibility and superior vibration resistance, effectively protecting electronic components.
- It maintains strong adhesion with both common plastics and metal materials.
Technical Parameters
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Parameters
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Hardener
BZ-708-5-2 A
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Resin
BZ-708-5-2 B
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Before curing
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Appearance
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Clear liquid
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Clear liquid
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Viscosity(mPa·s.25℃)
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1200±450
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1000±350
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Initial mixed viscosity(mPa·s.25℃)
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1050±250
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Density(g/cm³.25℃)
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1.04±0.05
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1.12±0.05
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Mixing&Curing
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Mix ratio(by weight)
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A:B=1:1
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Pot life 130±30g(min.25℃)
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16±6
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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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5±1
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Curing time 30g(H.25℃)
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7±1
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Curing time 30g(Heated)
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60℃ heated 1±0.5H
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After curing
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Hardness (Shore A)
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50±10
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Temperature resistance(℃)
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-40~85℃
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Flame retardant UL94
(Vertical burning)
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HB-V2
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Water absorption(24H)
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≤1.0%
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Surface resistivity (Ω/sq)
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≥1.0×1011
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Volume resistivity (Ω.cm)
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≥1.0×1011
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Tensile strength(MPa)
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≤6
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Elongation at break(%)
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≥500%
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Dielectric constant(at 50Hz)
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≤10
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Breakdown voltage(kV/mm)
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≥16
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Product Applications
- Tire Pressure Monitor:High adhesion, flexibility, and excellent vibration resistance
- Sensor: Transparency, flexible, resistant to high and low temperature shocks, suitable for various application scenarios.
- LED modules:Tolerant to high and low temperature changes, good flexibility, low stress
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 / 20KG/ 200KG metal or plastic drums.
- Resin: Typically 5KG/ 10KG / 20KG / 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.