Table 3. General Properties of Unaged and Air-aged NR/BIIR Blends

Measurement Condition: Unaged
Item	T-1	T-2	T-3	T-4	T-5
Hardness a)	69	71	72	74	72
Tensile Strength b)	203	179	170	159	166
Elongation at Break c)	360	330	320	300	420

Minimum torque value (lb-in)
Maximum torque value (lb-in)
Optimum cure time (min)