The properties of HSBP and DOPO–HSBP.
| Polyol | Hydroxyl number (mg KOH per g) | Acid number (mg KOH per g) | Viscosity (mPa s) (at 25 °C) | Color |
|---|---|---|---|---|
| HSBP | 420 | 2.2 | 50 638 | Pale yellow |
| DOPO–HSBP | 120 | 4.3 | 72 382 | Pale yellow |
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