Carbon nanotubes (CNTs) have been shown in the last years as versatile filler to influence several polymer properties favorably. This concerns especially the electrical conductivity of single- and multiwalled CNTs which can be transferred to insulating matrices by establishing a percolated filler network. Melt mixing was shown to be a highly convenient method to produce thermoplastic composites containing CNTs. One crucial point in producing such nanocomposites is the filler dispersion, which is difficult to achieve due to strong van-der-Waals forces and entanglements between the tubes. For that the addition of dispersion agent is a common way. In this study, polypropylene (PP) based composites with singlewalled CNTs (SWCNTs) were prepared by masterbatch dilution using a small-scale compounder Xplore DSM15. As SWCNTs unfunctionalised Tuball® (OCSiAl S.a r.l., Luxembourg) materials were used. To improve the SWCNT dispersion as well as to decrease the electrical percolation threshold an ionic liquid (IL, 1-Methxl-3-octylimidazolium tetrafluoroborate) was added. Different CNT : ionic liquid ratios were selected. Furthermore, the SWCNT concentration in the masterbatch was varied between 1 and 3 wt%. The CNT macrodispersion was characterized using light microscopy and the electrical resistivity was investigated. It was found that the electrical percolation threshold of the Tuball® filled PP composites prepared with a 2 wt% masterbatch and modified by the ionic liquid (CNT : IL=1:1) occurred at 0.05-0.07 wt%, whereas without the ionic liquid it was at 0.1 wt%. The electrical percolation threshold increased when using a higher concentrated masterbatch or a lower content of the ionic liquid.