Polypropylene composition containing a new charge-stabilizing agent for electret melt blown webs

A polypropylene composition (PC) comprising:

• i) from 95.0 to 99.99 wt. %, based on the total weight of the composition, of a polypropylene (PP);
• and
• ii) from 0.01 to 5.0 wt. %, based on the total weight of the composition, of a compound according to Formula (I):
• wherein each R is independently selected from C1 to C6 alkylene, C2 to C6 alkenylene and a single bond, each R′ is independently selected from H and C1 to C6 alkyl, each R″ is independently selected from H and C1 to C22 alkyl, wherein each alkylene, alkenylene and alkyl group may optionally be substituted by deuterium or fluorine, and the two substituents on the central benzene ring may be either positioned in an ortho, meta or para relationship;
• wherein the individual contents of the polypropylene (PP) and the compound according to Formula (I) add up to at least 98.0 wt. %, based on the total weight of the composition, and
• wherein the polypropylene (PP) has a melt flow rate MFR2, determined according to ISO 1133 at 230° C. at a load of 2.16 kg, in the range from 400 to 5000 g/10 min, a melting temperature Tm, determined by differential scanning calorimetry (DSC) according to ISO 11357, in the range from 140 to 170° C., and the polypropylene (PP) has been polymerized in the presence of a single site catalyst (SSC).