Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are
A
50°C and 3 - 4 kg/cm<sup>2</sup>
B
50°C and 1 kgf/cm<sup>2</sup>
C
250°C and 10 kgf/cm<sup>2</sup>
D
250°C and 1 kgf/cm<sup>2</sup>
Correct Answer: 50°C and 3 - 4 kg/cm<sup>2</sup>