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Looking for a Material Safety Data Sheet? (MSDS / SDS) Click the link to complete a request form.
Polyurethane Potting Compounds are a type of polymer that cures to form a solid and durable protective layer. They are widely used in the electronics industry for encapsulating and protecting components due to their excellent insulating properties, thermal conductivity，flexibility, and chemical resistance.
| Physical property: | |||
|---|---|---|---|
| Test Item | Test Condition | FS858A | FS858B |
| Appearance | Visual | Black Liquid | Liquid Brown Liquid |
| Density | 23℃，g/cm3 | 1.30-1.40 | 1.1-1.2 |
| Viscosity | 23℃, mPa.s | 5,000-10,000 | 30-75 |
| Technological parameters: | ||
|---|---|---|
| Item | Test Condition | FS658RA/b |
| Weight Ratio | 4:1 | |
| Viscosity after mixing | 23℃, mPa. s | 500-800 |
| Application time | 23℃，min， 100g | 40-100 |
| Initial curing time | 23℃，min， 100g | 180-240 |
| Performance parameters: | ||
|---|---|---|
| Item | Test condition or unit | FS858A/B |
| Hardness | Shore D，23℃ | 45-50 |
| Tensile strength | Mpa | >1.5 |
| Shrinkage rate | % | 0.05 |
| Water absorption | %, 24hrs | <0.2 |
| Flame retardant | UL94 | v-0 |
| Thermal conductivity | W/(m.K) | 0.5 |
| Volume resistivity | Ω.cm | 1.2*10(12) |
| Insulation strength | KV/MM | 18.5 |
| Temperature range for application | ℃ | -60~120 |
Polyurethane potting compounds are used to encapsulate and protect electronic components from environmental factors such as moisture, dust, chemicals, and mechanical stress. They are commonly used in automotive, aerospace, industrial, and consumer electronics applications.
Polyurethane potting compounds generally offer better flexibility and chemical resistance compared to epoxy compounds. Epoxies are typically harder and more brittle, making them suitable for applications requiring high structural strength.
Polyurethane potting compounds can cure at room temperature or with the application of heat. The curing method and time will depend on the specific formulation and application requirements.
Yes, many polyurethane potting compounds are designed to withstand a wide range of temperatures. However, it’s essential to choose a formulation that matches the specific thermal requirements of the application.
Yes, polyurethane potting compounds are formulated to provide excellent electrical insulation and protection without damaging sensitive electronic components. It’s important to follow manufacturer guidelines to ensure compatibility.
Selecting the right compound involves considering factors such as operating temperature range, mechanical stress, chemical exposure, and curing time. Consulting with suppliers or manufacturers can help identify the best formulation for your specific needs.
The shelf life varies depending on the formulation and storage conditions but is typically between 6 months to 1 years. Always check the manufacturer’s specifications for accurate information.
Removing cured polyurethane potting compounds can be challenging and often requires the use of specialized solvents or mechanical methods. Reworking is generally not recommended due to the difficulty in removing the compound without damaging the components.
The environmental impact of polyurethane potting compounds depends on their specific chemical composition. Many manufacturers offer eco-friendly formulations with reduced volatile organic compounds (VOCs) and hazardous substances.
Common application methods include manual pouring, automated dispensing systems, and vacuum encapsulation to ensure bubble-free potting. The method chosen will depend on the production volume and complexity of the components.
