Fast-Curing Polyurethane Potting Compound For Filters

BZ-6902-1 is a high-performance two-component polyurethane potting compound optimized for rapid sealing and structural bonding of air filters, oil filters, and high-efficiency filtration systems. With ultra-fast curing (full cure in 2.5±0.5 hours at 25℃), high elongation (≥50%), and exceptional electrical insulation (breakdown voltage ≥20 kV/mm), it balances mechanical flexibility with reliable performance across -40℃ to 100℃. Compliant with RoHS regulations, this formula features low water absorption (≤0.5%) and excellent adhesion to metal, plastic, and filter media, ensuring long-term durability in demanding industrial environments.

Key Product Features

1. Ultra-rapid curing: Full cure in 2.5±0.5 hours at 25℃; ≤15 minutes with 60℃ heating for high-volume production
2. 1:2 mix ratio: Simplifies proportioning, reduces waste, and works with automated dispensing systems
3. High flexibility: Shore A 65±8 hardness with ≥50% elongation, absorbing vibration and thermal stress
4. Superior insulation: Breakdown voltage ≥20 kV/mm, volume resistivity >1.0×10¹¹ Ω·cm for reliable isolation
5. Strong adhesion: Bonds tightly to metal, plastic, and filter media, ensuring leak-proof seals
6. RoHS compliant: Meets international environmental standards
7. Adjustable pot life: 7±3 minutes at 25℃, adaptable to summer/winter temperature variations

Technical Parameters

Product Applications

1. Air Filters: Seals automotive cabin filters, industrial HVAC filters, and cleanroom air filters, preventing air leakage and enhancing filtration efficiency.
2. Oil Filters: Bonds filter media to metal end caps in automotive and industrial oil filters, ensuring structural integrity under high-pressure conditions.
3. High-Efficiency Filters: Encapsulates HEPA and ULPA filter frames, providing airtight seals and mechanical stability in critical environments like hospitals and data centers.
4. Filter Control Electronics: Insulates sensor modules and control circuits in smart filter systems, protecting against dust, moisture, and electrical interference.
5. Industrial Filtration Systems: Seals hydraulic filters, fuel filters, and water treatment filters, withstanding exposure to harsh chemicals and temperature fluctuations.

Directions for Use

1. Pre-potting Preparation: Calibrate scales, prepare potting tools, cleaning tools, check machine settings, check vacuum pump force, etc.
2. Product Pre-treatment: Place product on a level surface or fixture. Remove dust, clean, degrease, and dry if necessary.
3. 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.
4. Mixing & Stirring: Manual operation requires thorough stirring or using electric stirrers to ensure homogeneous mixing. Machine potting requires sufficient stirring speed, adjust as needed.
5. Uniform Potting: Manual operation should be done in small, multiple batches to ensure uniformity. Machine potting should follow the programmed path for quantitative dispensing.
6. Inspection or Secondary Potting: After potting, visually inspect as needed. Perform touch-up, bubble removal, or secondary potting if required.
7. 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.
8. Final Product Confirmation: Perform visual inspection and performance testing as required by the customer.

Packing & Shipping & Storage

1. Hardener: Typically 5KG/10KG/20KG/200KG metal or plastic drums.
2. Resin: Typically 10KG/20KG/200KG metal or plastic drums.
3. Store and transport as a general chemical product.
4. 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.
5. 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.