Automotive Grade Potting Compound HN-8808 Series - Vibration & Thermal Shock

Product Specification

Automotive Grade Potting Compound HN-8808 Series - Vibration & Thermal Shock Resistant

Product Overview for Silicone Potting Compound:

The HN-8808 Series Potting Compounds meet the stringent reliability requirements of automotive electronics. Their excellent elastomeric properties effectively absorb mechanical vibration and shock stress. The wide operating temperature range (-50°C to 200°C) ensures stable performance in harsh environments like engine compartments. This product is designed to protect automotive electronic modules from moisture, chemicals, thermal cycling, and vibration, helping them pass automotive-grade reliability tests.

Key Performance Parameters for Silicone Potting Compound:

* Appearance (Mixed): Transparent/Black/White Elastomer (select as needed)

* Mix Ratio (A:B): 10 : 1 (by weight)

* Pot Life (25°C): 40-60 minutes

* Cure Time (25°C): 4-6 hours (tack-free), 24 hours (full cure)

* Hardness (Shore A): 30-40 (GB/T531-1999)

* Volume Resistivity: ≥5.0×10¹⁴ Ω·cm (GB/T 31838.2-2019)

* Thermal Conductivity: 0.3-0.5 W/M·K (depending on color, GB/T 38712-2020)

* Dielectric Strength: ≥14 kV/mm

* Elongation at Break: ≤100%

Product Highlightsfor Silicone Potting Compound:

* Exceptional Environmental Resilience: Resistant to thermal shock, high temperature/humidity, with stable performance under extremes.

* Excellent Chemical Resistance: Good resistance to automotive oils, brake fluids, coolants, etc.

* Effective Stress Relief: Low hardness and high elasticity absorb stress between PCB and housing, protecting delicate components.

* Long-Term Durability: Superior anti-aging properties ensure continuous protection throughout the vehicle's lifecycle.

* Compliant with Environmental Standards: Products comply with directives like RoHS, meeting automotive industry environmental requirements.

Application Areas for Silicone Potting Compound:

* Engine Control Units (ECU)

* Battery Management Systems (BMS), Onboard Chargers (OBC)

* Sensors (e.g., pressure, position sensors)

* Light controllers, wiper controllers

* Infotainment systems & dashboards

Detailed Operating Guide for Silicone Potting Compound:

1. Process Validation: Strongly recommend process validation before mass production to confirm compatibility with your substrates (e.g., epoxy PCB, polyurethane enameled wires).

2. Precise Metering & Mixing: Recommend using static mixers with dual-component meter-mix equipment for absolute ratio accuracy and thorough mixing, critical for long-term automotive reliability.

3. Vacuum Degassing: Vacuum degassing is mandatory to eliminate any potential for partial discharge or increased thermal resistance.

4. Controlled Potting Environment: Potting should be done in a clean, temperature, and humidity-controlled environment to minimize contamination risk.

5. Adequate Curing & Post-Curing: Allow to sit at room temperature for at least 24 hours after potting before electrical testing. Final sealing and rigorous environmental testing should be performed after 7 days.

Key Precautions for Silicone Potting Compound:

* Compatibility Testing: Must test compatibility with all materials on the PCBA (solder mask, labels, conformal coatings) to avoid silicone oil bleeding or adhesion failure.

* By-product Release: Curing releases ethanol by-products. Housing design should include vent holes, sealed only after curing is complete.

* Do Not Heat: Heat curing will cause complete product failure and is strictly prohibited.

* Incoming Inspection: Recommend spot-checking key properties (viscosity, pot life) for each batch received.

Packaging & Storage for Silicone Potting Compound:

* Standard Packaging: 22kg/set (20kg A + 2kg B); 11kg/set (10kg A + 1kg B). 200kg steel drums also available for high-volume needs.

* Storage Conditions: Store in a cool, dry place away from direct sunlight.

* Shelf Life: 6 months in original, unopened containers from date of manufacture.

FAQ for Silicone Potting Compound:

1. Q: Is this product certified to specific automotive standards?

A: Our products comply with automotive-related material standards (e.g., RoHS). We can support your end-product certification by providing all required Material Data Sheets.

2. Q: How do you prevent delamination during vibration testing?

A: Our optimized formulation ensures excellent adhesion to metals (especially aluminum) and PCBs, while its elastic modulus effectively dissipates vibrational stress. We can provide relevant vibration test reports.

3. Q: Do the curing by-products affect sensitive components?

A: The released ethanol is safe under normal ventilation. For extremely sensitive optical components or contacts, thorough evaluation is recommended. We can also discuss alternative cure systems (e.g., alkoxy).

4. Q: Can you provide UL certification?

A: The HN-8808 series is undergoing UL 94 V-0 certification. Please consult our sales for the latest status.

5. Q: Our production line lacks temperature control in winter, leading to long cure times. Any solution?

A: We understand this issue. While heating is not an option, we can offer a low-temperature fast-cure version that achieves tack-free state within 8 hours even at 15°C. Samples are available for testing.