Patent ID: 9595374
Date: 2017-03-14
CPC Classifications: C08J,C08K,H01B

Claim:
1. An alternating current (AC) power cable, comprising a conductor surrounded by at least an inner semiconductive layer comprising a first semiconductive composition, an insulation layer comprising a polymer composition, an outer semiconductive layer comprising a second semiconductive composition and, wherein the polymer composition of the insulation layer comprises a polyolefin and a crosslinking agent, wherein the polyolefin is an unsaturated LDPE polymer, which is selected from the group consisting of an unsaturated LDPE homopolymer and an unsaturated LDPE copolymer of ethylene with one or more comonomer(s), and wherein the polymer composition of the insulation layer has a dielectric loss expressed as tan δ (50 Hz) of 12.0 ×10 wherein the polyolefin is obtainable by a high pressure process comprising: (a) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (b) polymerizing a monomer optionally together with one or more comonomer(s) in a polymerization zone, and (c) separating the obtained polyolefin from the unreacted products and recovering the separated polyolefin in a recovery zone, wherein the compressor lubricant comprises a mineral oil.