	US 12,142,394 B2
	Electrical insulation material and manufacturing process
Thibaut Lefort, Villeurbanne (FR); Damien Bachellerie, Lyons (FR); Sébastien Pruvost, Trevoux (FR); Jannick Duchet, Saint Euphemie (FR); and Sébastien Livi, Villeurbanne (FR)
Assigned to SUPERGRID INSTITUTE, Villeurbanne (FR); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), Paris (FR); UNIVERSITE CLAUDE BERNARD LYON 1, Villeurbanne (FR); INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE LYON, Villeurbanne (FR); and UNIVERSITE JEAN MONNET SAINT ETIENNE SAINT, Saint Etienne (FR)
Appl. No. 17/296,598
Filed by SUPERGRID INSTITUTE, Villeurbanne (FR); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), Paris (FR); UNIVERSITE CLAUDE BERNARD LYON 1, Villeurbanne (FR); INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE LYON, Villeurbanne (FR); and UNIVERSITE JEAN MONNET SAINT ETIENNE, Saint Etienne (FR)
PCT Filed Dec. 27, 2019, PCT No. PCT/FR2019/053305 § 371(c)(1), (2) Date May 25, 2021, PCT Pub. No. WO2020/141280, PCT Pub. Date Jul. 9, 2020.
Claims priority of application No. 1874421 (FR), filed on Dec. 31, 2018.
Prior Publication US 2022/0028574 A1, Jan. 27, 2022
Int. Cl. C08K 5/19 (2006.01); C08K 5/5313 (2006.01); H01B 3/40 (2006.01); H01B 19/02 (2006.01); H02B 13/045 (2006.01)

CPC H01B 3/40 (2013.01) [C08K 5/19 (2013.01); C08K 5/5313 (2013.01); H01B 19/02 (2013.01); H02B 13/045 (2013.01)]

24 Claims

1. An electrically insulating composite material formed from:

i) a polyepoxide matrix, said polyepoxide matrix being a cycloaliphatic polyepoxide matrix or a diglycidyl ether polyepoxide matrix, in a content of less than 40% by mass,

ii) from 20 to 75% by mass of one or several micrometric and/or mesometric filler,

iii) from 0.1 to 20% by mass of at least one ionic liquid,

the masses being expressed relative to the total mass of the electrically insulating composite material,

wherein the electrically insulating composite material has a volume electrical conductivity ranging from 10⁻¹⁸to 10⁻¹²S/m.