High Temperature Urethane Electrical Potting Material Compound Waterproofing 3901

High-Temperature-Resistant Electrical Potting Compound With UL94 -V1                                                                     

Product Description

BZ-3901 is a two-component addition-cure Electrical Potting Compound engineered for high-power electronic devices requiring enhanced temperature resistance and flame safety, featuring excellent thermal conductivity (≥0.8 W/m·K), wide temperature tolerance (-60~220℃), and UL94 V1 flame retardancy. With a 1:1 mix ratio and fast curing time of 2-4.5 hours at 25℃, it supports efficient automated production processes while providing exceptional electrical insulation, waterproofing, and vibration resistance. As an addition-cure product, it cures without releasing volatile byproducts, making it suitable for sealed assemblies and sensitive electronic components.

Key Product Features

1. Enhanced Temperature Stability: Maintains consistent mechanical and electrical properties across -60℃ to 220℃, ensuring reliable performance in extreme operating environments
2. UL94 V1 Flame Retardancy: Achieves UL94 V1 flame retardancy at 3.0mm thickness, providing enhanced safety in power electronics applications
3. Efficient Heat Dissipation: Formulated with high-quality thermal fillers to create an efficient heat conduction path, effectively transferring heat from power components to heat sinks or housings
4. Fast Curing Cycle: 2-4.5 hour full cure time at 25℃ (accelerated curing at 60℃) supports high-volume production lines with rapid turnaround times
5. Low-Volume Curing: Addition-cure mechanism eliminates volatile byproducts during curing, preventing void formation and ensuring reliable performance in sealed assemblies

Technical Parameters 

Product Applications

1. Industrial Power Electronics: Encapsulates high-power IGBT modules, rectifiers, and inverters in industrial motor drives, welding equipment, and uninterruptible power supply (UPS) systems, withstanding extreme temperature fluctuations and ensuring electrical safety
2. Aerospace & Defense Electronics: Protects power control units, radar systems, and communication modules in aerospace and defense applications, where wide temperature tolerance and flame safety are critical
3. High-Temperature LED Lighting: Pottings drivers and control modules in high-power LED grow lights, industrial ovens, and aerospace lighting fixtures, operating reliably in elevated temperature environments
4. Automotive Under-Hood Electronics: Encapsulates engine control units (ECUs), power distribution modules, and battery management systems (BMS) in electric vehicles, withstanding high temperatures and vibration in under-hood environments

Critical Curing & Handling Precautions

BZ-3901 utilizes an addition-cure mechanism that is sensitive to certain materials:

1. Avoid Contamination: Prevent contact with organotin compounds, sulfur-containing materials, and amine-containing substances during mixing and dispensing, as these can inhibit curing
   2. Vacuum Degassing: For optimal results, degas the mixed adhesive under vacuum to remove air bubbles, ensuring uniform potting and reliable heat transfer
   3. Humidity Control: Maintain workshop humidity ≤70% during curing to prevent moisture-related issues, especially in sealed assemblies

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.

   9. This series of products are room-temperature-curing, addition-cure two-component silicone. During the dispensing process, avoid contact with the following three types of materials to prevent reactions that may affect the curing effect:

       a. Organotin compounds and organotin-containing silicone rubber.

       b. Sulfur, sulfides, and sulfur-containing materials.

       c. Amine compounds and amine-containing materials.

     10. It should be noted that during manual operation, when vacuumizing the mixed A+B adhesive, the vacuum pressure must be controlled to ensure the adhesive is not completely sucked out of the container by the vacuum.

Packing & Shipping & Storage

1. Part A: Typically supplied in 25kg sealed plastic drums.
2. Part B: Typically supplied in 25kg sealed 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.

 FAQ:

Q1: What are the primary applications of High-Performance Silicone Potting Compounds?

A1: High-Performance Silicone Potting Compounds are widely used for protecting electronic components, sensors, and circuit boards from moisture, dust, vibration, and thermal shock. They are ideal for automotive, aerospace, and industrial electronics applications.

Q2: What temperature range can High-Performance Silicone Potting Compounds withstand?

A2: These silicone potting compounds typically withstand a broad temperature range, from approximately -60°C to +220°C, making them suitable for extreme environmental conditions.

Q3: Are these silicone potting compounds electrically insulating?

A3: Yes, High-Performance Silicone Potting Compounds provide excellent electrical insulation, helping to prevent short circuits and ensuring reliable performance of electronic assemblies.

Q4: How is the curing process performed for these silicone potting compounds?

A4: The curing process can vary depending on the specific formulation but generally involves room temperature curing or heat curing. They typically cure to a solid elastomer within hours to a day, providing durable protection.

Q5: Are High-Performance Silicone Potting Compounds resistant to chemicals and moisture?

A5: Yes, these compounds exhibit strong resistance to moisture, water, and various chemicals, which helps enhance the longevity and reliability of the encapsulated components.