Table 2. Mooney Viscosity and Cure Characteristics of NR/BIIR Blends

T-1 T-2 T-3 T-4 T-5
Mooney Viscosity - 133 118 89 89 94
Scorch Time (140°C) t10 min 2.7 3.4 4.6 5.8 7.3
ODR (160°C) MLa) lb-in 16.7 13.9 10.4 10.1 10.3
MHb) lb-in 39.8 38.3 35.4 31.1 29.8
t10 min 0.9 1.2 1.5 1.7 1.5
t50 min 1.9 2.3 2.8 3.0 2.4
t90c) min 4.8 7.4 8.9 13.4 16.6
Minimum torque value (lb-in)
Maximum torque value (lb-in)
Optimum cure time (min)