Open Access
Table 2
Polyurethane properties.
| Designation | PU-10 | PU-20 | PU-30 |
|---|---|---|---|
| Shore A hardness | 10 | 20 | 30 |
| Specific gravity | 1 | 1 | 1.03 |
| Cure time at 25 °C (hours) | 24 | 24 | 16 |
| Mixed viscosity (cps) | 3100 | 1000 | 750 |
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