Table 2. Mixing Procedure Used to Manufacture the Compounds and Vulcanizates

Time (min:s) Action
1st Stage 0:00–1:30 NR mastication (initial temp.: 100°C)
1:30–2:40 Add silica 1/2, TESPT 1/2, and oil or E-LqIRs 1/2
2:40–3:40 Add remaining silica, TESPT, and oil or E-LqIRs
3:40–5:30 Add ZnO, St/A, 6PPD, and TMQ
5:30 Ram up
5:30–7:30 Extra mixing and dump (dump temp.: 150-155°C)
2nd Stage 0:00–0:30 Master batch from first stage (initial temp.: 50°C)
0:30–2:30 Curatives and dump (dump temp.: 80-90°C)