METHOD FOR TREATING LARGE AMOUNT OF GRANULAR POLYBUTADIENE

摘要

PROBLEM TO BE SOLVED: To provide a method for treating a large amount of granular polybutadiene by which the flowability of the granular polybutadiene is improved or regenerated by heating in a specific temperature range the granular polybutadiene existing in a container at a specific temperature or lower. SOLUTION: This method for treating a large amount of granular polybutadiene existing in a container at a temperature of <=35 deg.C comprises treating the granular polybutadiene at 50 to 70 deg.C. The heating is preferably carried out, for example, by a method cpmprising bringing the granular polybutadiene into contact with and gas (preferably air or nitrogen) maintained at a temperature of 50 to 70 deg.C. The inert gas is preferably applied at a superficial gas velocity of 0.5 to 4 ft/sec in order to maintain the fluidized state of the bed. The polybutadiene is preferably preliminarily produced by a gas phase production process, and the gas phase production process is preferably carried out in the presence of an inactive granular substance such as carbon black in an amount of 0.3 to 80 wt.% based on the final amount of the produced polybutadiene.