| abstract |
Peroxide masterbatch comprising: - 15-55 wt% of one or more organic peroxides, - 15-45 wt% of one or more copolymers of at least two different monomers, the first monomer being ethylene or propylene, the second monomer being a vinyl monomer comprising at least four carbon atoms and optionally heteroatoms, - 6-70 wt% of at least two filler types –filler type 1 and filler type 2 - each having a different BET surface area: (i) filler type 1 being present in the masterbatch in a concentration of 3-30 wt% and having a BET surface area of more than 100 m 2 /g; (ii) filler type 2 being present in the masterbatch in a concentration of 3-40 wt% and having a BET surface area of 100 m 2 /g or less; wherein the masterbatch has the form of extrudates. |