| (unit:phr) | C40-Ref | C60-Ref | C40-S6 | C60-S6 | C40-O6 | C60-O6 | |
|---|---|---|---|---|---|---|---|
| Step 1 | SSBR | 100 | 100 | 100 | 100 | 100 | 100 |
| Carbon black | 40 | 60 | 40 | 60 | 40 | 60 | |
| Surfactant | - | - | 6 | 6 | - | - | |
| TDAE Oil | - | - | - | - | 6 | 6 | |
| ZnO | 3 | 3 | 3 | 3 | 3 | 3 | |
| S/A | 2 | 2 | 2 | 2 | 2 | 2 | |
| 6PPD | 1 | 1 | 1 | 1 | 1 | 1 | |
| Step 2 | Sulfur | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| CBS | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | |
| DPG | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | |