公开(公告)号：US20230174740A1

公开(公告)日：2023-06-08

申请号：US18073854

申请日：2022-12-02

Applicant: Borealis AG

Inventor： Thomas Gkourmpis ,  Roland Kadar ,  Georgia Manika ,  Athanasios Theodoridis

IPC: C08K3/04 ,  C08F10/06 ,  C08F10/02 ,  H01B1/24 ,  B32B27/32

CPC classification number: C08K3/04 ,  C08K3/042 ,  C08K3/041 ,  C08F10/06 ,  C08F10/02 ,  H01B1/24 ,  B32B27/32 ,  C08K2201/001 ,  C08K2201/014 ,  H01B9/027

Abstract: The invention relates to a semiconductive polyolefin composition comprising, (A) 80 to 99.5 wt. % of an olefin polymer base resin based on the total weight of the semiconductive polyolefin composition; (B) 0.1 to 10.0 wt. % of first carbonaceous structures based on the total weight of the semiconductive polyolefin composition; (C) 0.2 to 15.0 wt. % of carbon black and/or second carbonaceous structures based on the total weight of the semiconductive polyolefin composition; and (D) optionally additives; wherein the combined amount of components (B) and (C) is at least 0.3 wt. % and not more than 15.0 wt. % based on the total weight of the semiconductive polyolefin composition; and wherein the semiconductive polyolefin composition has an electrical percolation threshold of not more than 5 wt. % of the combined amount of components (B) and (C) dispersed in the olefin polymer base resin (A), the electrical percolation threshold being defined as the critical concentration in wt. % of the components (B) and (C) in the olefin polymer base resin (A) where an exponential increase in electrical conductivity is observed; wherein the polyolefin composition has a conductivity of at least 1·10−7 S/cm determined according to Broadband Dielectric Spectroscopy for a percolation threshold of 1.0 wt. % or lower and 2-point electrical measurements for a percolation threshold of more than 1.0 wt. %; and wherein components (A) to (D) add up to 100 wt. %.