US 12,014,848 B2
Flame-retardant cable with self-extinguishing coating layer
Pauline Audebet, Milan (IT); Vito Scrima, Milan (IT); Luigi Caimi, Lomagna (IT); and Flavio Casiraghi, Osnago (IT)
Assigned to Prysmian S.P.A., Milan (IT)
Filed by Prysmian S.P.A., Milan (IT)
Filed on Nov. 9, 2021, as Appl. No. 17/454,080.
Claims priority of application No. 102020000026897 (IT), filed on Nov. 11, 2020.
Prior Publication US 2022/0148760 A1, May 12, 2022
Int. Cl. H01B 7/295 (2006.01); C09D 5/18 (2006.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01); C09D 123/06 (2006.01); C09D 123/08 (2006.01); H01B 3/44 (2006.01)
CPC H01B 7/295 (2013.01) [C09D 5/18 (2013.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01); C09D 123/06 (2013.01); C09D 123/0853 (2013.01); H01B 3/441 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A flame-retardant cable, the cable comprising
at least one conductor, and
a coating layer made from a low smoke zero halogen flame-retardant polymer composition comprising a halogen free base polymer added with:
a) from 100 phr to 160 phr of at least one metal hydroxide;
b) from 1 to 10 phr of a phyllosilicate clay;
c) at least 1 phr and less than 10 phr of melamine or a derivative thereof; and
d) from 20 to 70 phr of an alkali or alkaline-earth metal carbonate.