2. Foaming Properties of Standard and Bio-Based Polyurethane Foams.
| Sample | Cream Time (s) | Foaming Start Time (s) | Free Rise Time (s) | Gel Time (s) | NCO/OH Ratio |
|---|---|---|---|---|---|
| Standard PU Foam | 11 | 35 | 83 | 189 | 1.82 |
| 25 CH/PU Foam | 17 | 53 | 94 | 230 | 0.88 |
| 50 CH/PU Foam | 19 | 67 | 105 | 235 | 0.61 |
| 65 CH/PU Foam | 37 | 142 | 247 | 650 | 0.50 |