Preparation and Characterization of Polypropylene Masterbatches

Example 1

Polypropylene masterbatches containing the calcium carbonate fillers CC1 to CC8 and the polymer P1 were continuously prepared on a lab scale Buss kneader (Buss PR46 from Buss AG, Switzerland). The polymer P1 was pre-dried prior to processing in an oven at 160° C. for 4 hours. The compositions and filler contents of the prepared masterbatches are compiled in Table 1 below. The precise filler content was determined by the ash content.

Masterbatches MB1 to MB6 could be produced in good quality, whereas masterbatches MB7 and MB8 were difficult to compound and received pellets were of bad quality.