3,6,9-Triethyl-3,6,9-trimethyl-1,4,7-triperoxonane is an efficient peroxide formulation for the production of controlled rheology polypropylene (CR-PP) in an extrusion process in the temperature range of 200-250°C. These beads form masterbatch of the liquid 3,6,9-Triethyl-3,6,9-trimethyl-1,4,7-triperoxonane, allowing a more accurate dosage of the peroxide to the polymer. Also, a more homogeneous distribution of the peroxide throughout the polymer is advantageous. Using the beads form formulation rather than the liquid form results in better control of the visbreaking process. 3,6,9-Triethyl-3,6,9-trimethyl-1,4,7-triperoxonane allows polypropylene producers great flexibility in controlling a polymer’s Melt Flow Index (MFI). Small changes in either peroxide concentration or process temperature can produce significantly different MFI’s.
