US 12,033,772 B2
Flame retardant electrical cable
Vito Scrima, Milan (IT); Luigi Caimi, Milan (IT); Massimo Gola, Milan (IT); and Attilio Citterio, Milan (IT)
Assigned to Prysmian S.P.A., Milan (IT); and Politecnico di Milano, Milan (IT)
Appl. No. 17/049,684
Filed by PRYSMIAN S.P.A., Milan (IT); and POLITECNICO DI MILANO, Milan (IT)
PCT Filed Apr. 26, 2018, PCT No. PCT/EP2018/060664
§ 371(c)(1), (2) Date Oct. 22, 2020,
PCT Pub. No. WO2019/206412, PCT Pub. Date Oct. 31, 2019.
Prior Publication US 2021/0241940 A1, Aug. 5, 2021
Int. Cl. H01B 7/295 (2006.01); C08F 10/02 (2006.01); C08K 3/04 (2006.01); C08K 3/36 (2006.01); B82Y 40/00 (2011.01)
CPC H01B 7/295 (2013.01) [C08F 10/02 (2013.01); C08K 3/041 (2017.05); C08K 3/36 (2013.01); B82Y 40/00 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A flame-retardant electric cable having a core comprising an electric conductor and an electrically insulating layer made from a flame-retardant polyolefin-based composition comprising:
a) a cross-linked polyolefin as base polymer;
b) silica; and
c) carbon nanotubes,
wherein an amount of the silica is from 5 wt % to 10 wt % of a weight of the polyolefin-based composition, and an amount of carbon nanotubes is from 0.5 wt % to 2 wt % of the weight of the polyolefin-based composition.