NEW CROSSLINKED LOW MFR POLYMER COMPOSITION, POWER CABLE INSULATION AND POWER CABLE Russian patent published in 2018 - IPC C08K5/01 C08K5/14 C08K5/36 H01B7/02 H01B9/00 

FIELD: electricity.

SUBSTANCE: invention relates to a crosslinked polymer composition, its use in insulation of a power cable and a power cable. Crosslinked polymer composition is obtained by cross-linking a polymer composition which has a melt flow rate (MFR) of less than 1.7 g/10 min and contains a polyolefin, a peroxide and a phenolic sulphur-containing antioxidant. Crosslinked polymer composition has an oxidation induction time which corresponds to Z min, and contains an amount of peroxide by-products, which corresponds to W ppm, where 0≤Z≤60, 0≤W≤9500, and W≤p-270⋅Z, and p = 18500. Polymer composition contains less than 0.05 wt% of 2,4-diphenyl-4-methyl-1-pentene.

EFFECT: providing a low-conductivity polymer composition suitable for applications in direct current high-voltage and ultra-high voltage cables.

16 cl, 3 tbl