ELECTRICALLY CONDUCING POLYMER COMPOSITION Russian patent published in 2018 - IPC C08K3/04 C08L23/00 C08K5/00 H01B3/44 

FIELD: cable technology.

SUBSTANCE: invention relates to a cable technology and can be used to produce sleeves for cables with plastic and paper insulation, as well as antistatic coatings. Electrically conductive polymer composition for power cable shields comprising a polyolefin, polyethylene wax, zinc distearate, 2',3-bis[[3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyl]]propionohydrazide (a synonym for benzopropionic acid 3,5-bis(1,1-dimethyl-ethyl)-4-hydroxy-2-[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxy-phenyl]-1-oxopropyl]hydrazide), additionally introduced nonpolar polyolefin, electrically conductive technical carbon with specific volume resistance ρ = 8÷12 Ohm*m (with content in the polymer), electrically conductive technical carbon with specific volume resistance not higher than ρ = 0.40÷0.60 Ohm*m (with content in the polymer), the primary antioxidant thiodiethylene bis [3-(3,5-di-tert-butyl-4-hydroxypheyl)propionate], the secondary thioester antioxidant distearyl thiodipropionate, at the following component ratio, wt. %: polyolefin 73–87, non-polar polyolefin 1–5, technical carbon with specific volume resistance ρ = 8÷12 Ohm*m 5–10, technical carbon with specific volume resistance ρ = 0.40÷0.60 Ohm*m 1–5, 2',3-bis[[3-[3,5-di-t-butyl-4-hydroxyphenyl]propionyl]]propionohydrazide 0.05–0.25, thiodiethylene bis [3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] 0.05–0.25, distearyl thiodipropionate 0.04–0.25, zinc distearate 0.15–1.0, polyethylene wax 1–8.

EFFECT: technical result is the provision of a specific volume resistance of at least 1,000 Ohm*cm, but not more than 100,000 Ohm*cm, as well as an increase in the relative elongation at break up to a level of 400 to 900 %, ensuring the suitability for molding by extrusion and injection molding in a wide range of temperatures, higher processability in the molding process, namely the absence of undesirable ligation and gel-fraction.

1 cl, 2 tbl