ELECTRICALLY CONDUCTIVE CROSS-LINKED COMPOSITION BY THE PEROXIDE METHOD FOR HIGH-VOLTAGE POWER CABLES SCREENS Russian patent published in 2017 - IPC H01B3/44 H01B3/46 

FIELD: chemistry.

SUBSTANCE: invention relates to cross-linked by the peroxide method electrically conductive polyolefin compounds for screens of high-voltage power cables. Disclosed is a electrically conductive cross-linked by the peroxide method composition for screens of high-voltage power cables, containing (wt%): polyolefin (49-62), benzopropion acid 3,5-bis(1,1-dimethylethyl)-4-hydroxy-2-[3-[3,5-bis(1,1-dimethyl)-4-hydroxyphenyl]-1-oxo-propyl]hydrazide (0.05–0.20), tetra-bis-methylene-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) (0.05–0.20), organic peroxide (0.2–1.9), technical carbon with specific volume resistance when contained in a polymer ρ=10±6 Ohm·cm (29–34), technical carbon with specific volume resistance when contained in a polymer ρ=5±3 Ohm·cm (2.5–5), 4,4'-tiabis(6-tert-butyl-m-cresol) (0.05–0.25), zinc stearate (0.15–1.0), polyethylene wax (3-9), high-molecular siloxane (0.5–1.5).

EFFECT: technical result – suggested composition has improved mechanical properties and sufficient value of specific volume resistance, at the same time it ensures smoothness of boundary surface of the electrically conductive screen and insulating layer, which allows to improve the operating properties of high-voltage power cables, improve the reliability of power networks, reduce the cost of their maintenance.

1 cl, 2 tbl, 5 ex