PEROXIDE-CROSSLINKED COMPOSITION FOR INSULATION OF POWER CABLES Russian patent published in 2017 - IPC H01B3/30 H01B3/42 H01B3/44 

FIELD: chemistry.

SUBSTANCE: invention relates to crosslinkable polymer compositions for production of insulating layer of medium-voltage electric cables. Peroxide-crosslinked composition for insulation of power cables, comprising polyolefin and organic peroxide, additionally includes a copolymer of ethylene with butyl acrylate, ethylene copolymer based on butene, or based on hexene, or based on octene, monomethyl ether of polyethylene glycol, thiodiethylene-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], dialkyl ester of thiodipropionic acid in following content of components, wt%: polyolefin 80.0–93.0, copolymer of ethylene with butyl acrylate 3.0–5.0, ethylene copolymer based on butene, or hexene, or octene 2.5–4.0, monomethyl ether of polyethylene glycol 0.2–1.0, thiodiethylene-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] 0.1–1.0, dialkyl ester of dithiodipropionic acid 0.1–1.0, organic peroxide 1.5–2.5.

EFFECT: high frost resistance of insulation composition from minus 21 °C to minus 38 °C is technical result of invention; invention considerably improves operational characteristics, increasing mechanical strength and thermal stability of insulating layer of cable in conditions of harsh climatic zones.

1 cl, 2 tbl