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Compositions of the NBR with silica fillers.
| Composition | NBR-S20 | NBR-S40 | NBR-S60 |
|---|---|---|---|
| KBR 35 L | 100 | 100 | 100 |
| ZnO | 3.0 | 3.0 | 3.0 |
| St/A | 1.0 | 1.0 | 1.0 |
| Silica S-175 | 20 | 40 | 60 |
| Si-69 × | 1.6 | 3.2 | 4.8 |
| PEG # | 0.8 | 1.6 | 2.4 |
| S | 1.5 | 1.5 | 1.5 |
| TBBS + | 0.7 | 0.7 | 0.7 |
× Si-69: silane coupling agent; # PEG: polyethylene glycol; + TBBS: N-tert-butyl-2-benzothiazole sulfenamide.
