Polyolefin formulation

A coated conductor comprising a conductive core and an insulation layer at least partially covering the conductive core, wherein at least a portion of the insulation layer comprises a crosslinkable polyolefin formulation comprising (A) a polyethylene polymer and (B) an arylketone of formula (I):

• wherein each of R1 to R6 is a hydrogen atom (H);
• or wherein R1 and R2, or R3 and R4, or R4 and R5, or R5 and R6, are bonded together with the carbon atoms in formula (I) to which they are bonded to form a fused 6-membered aryl ring and each of the remaining four of R1 to R6 is H;
• or wherein R2, R3, and R4 are bonded together in such a way with the carbon atoms in formula (I) to which they are bonded and the closest bridgehead carbon atom in formula (I) to form two fused 6-membered aryl rings and each of R1 R5, and R6 are H;
• and wherein one of RA and RB is a group of formula —C(═O)—R7 and the other of RA and RB is H, or wherein RA is a group of formula —C(═O)—R7 and RB and R1 are bonded together with the carbon atoms in formula (I) to which they are bonded to form a fused 6-membered aryl ring and R2 to R6 are as defined above;
• wherein R7 is an unsubstituted (C1-C40)alkyl group;
• wherein the (A) polyethylene polymer comprises from 51 to 100 weight percent (wt %) ethylene-derived constituent units and from 49 to 0 wt %, respectively, of alpha-olefin-derived constituent units, based on weight of the (A) polyethylene polymer;
• and wherein the crosslinkable polyolefin formulation comprises from 30.0 to 99.9 wt % of the (A) polyethylene polymer based on total weight of the crosslinkable polyolefin formulation and from 0.1 to 3.0 wt % of the (B) arylketone based on total weight of the crosslinkable polyolefin formulation.