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Polyurethane raw materials denotation
| Category of the independent variable | Type of substrate | Substrate in each category | Value of the pointer assigned to the substrate in each category (independent variable) |
|---|---|---|---|
| I | Diisocyanate | MDI | 1 |
| IPDI | 2 | ||
| J | Polyol | POG 600 | 1 |
| PPG 450 | 2 | ||
| K | Tertiary amines | NBDA + 15%TFBD | 1 |
| NBDA + 10%TFBD | 2 | ||
| NMDA + 15%TFBD | 3 | ||
| NBDA + 5%TFBD | 4 | ||
| NBDA | 5 | ||
| NMDA + 10%TFBD | 6 | ||
| NMDA | 7 | ||
| NMDA + 5%TFBD | 8 |
