| About |
|---|
| This two component urethane series are low durometer (30-90 Shore A), potting, casting, and encapsulating compounds. They are unfilled materials engineered to provide excellent hydrolytic stability and low moisture permeability. They have outstanding thermal cycling properties, low glass transition temperatures and low embedment stress to sensitive electronic components. These unique urethane formulations maintain their integrity over a wide operating temperature range. The low glass transition temperature of approximately -70°C makes these urethanes ideal for low temperature potting applications. These systems exhibit very little hardness increase when cooled to -72°C. Features: Maintains flexibility at low temperatures Thermal cycling stability Excellent electrical insulation Chemical resistance Low stress on sensitive components Hydrolytic stability&& |
| Product Description | |
|---|---|
| Generic | PUR |
| Material Status | Commercial: Active |
| Features | Good flexibility,Hydrolysis stability,Low or no water absorption,Solvent resistance,Insulation |
| Availabilitys | Africa & Middle East ,North America,Latin America,Asia Pacific,Europe |
| Technical Data | |||
|---|---|---|---|
| THERMAL | Nominal value | Unit | Test method |
| Glass transition temperature | -70.0 | ℃ | |
| Linear coefficient of thermal expansion | |||
| MD | 2.3E-4 | 1/℃ | |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Surface resistivity | 1.0E+16 | ohms |
| Thermosetting mixed viscosity | Nominal value | Unit | Test method |
|---|---|---|---|
| 25℃ | 5000 | cP |
| Supplementary information | Nominal value | Unit | Test method |
|---|---|---|---|
| working temperature | -40.0 to 125 | ℃ |
| Uncured Properties | Nominal value | Unit | Test method |
|---|---|---|---|
| colour | Black | ||
| Weight Mix Ratio (PBW) | |||
| Part A | 100 | ||
| Part B | 15 | ||
| Density | |||
| 25℃ | 0.898 | g/cm³ | |
| 25℃ | 1.17 | g/cm³ | |
| Curing time | |||
| 85℃ | 0.66 | hr | |
| 65℃ | 1.5 | hr | |
| 45℃ | 2.5 | hr | |
| 25℃ | 24 to 48 | hr | |
| storage stability | |||
| 25 ℃ | 150 | min |
| Cured Properties | Nominal value | Unit | Test method |
|---|---|---|---|
| Shore hardness | |||
| Shaw’s A | 45 | ||
| tensile strength | 1.04 | MPa | |
| Tensile strain | |||
| fracture | 120 | % | |
| Relative permittivity | |||
| 1 kHz，25℃ | 4.50 | ||
| Volume resistivity | 6.0E+16 | ohms·cm |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. Part A |
| 3. Part B |
| 4. 100 gram mass |
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