US 12,071,506 B2
Electrical device comprising a cross-linked layer
Laureene Malheurty, Macon (FR); Didier Billemaz, Nievroz (FR); and My Hanh Linda Nguyen, Lyons (FR)
Assigned to NEXANS, Courbevoie (FR)
Filed by NEXANS, Courbevoie (FR)
Filed on Jun. 3, 2020, as Appl. No. 16/892,258.
Claims priority of application No. 19 05929 (FR), filed on Jun. 4, 2019.
Prior Publication US 2020/0399421 A1, Dec. 24, 2020
Int. Cl. C08G 59/50 (2006.01); C08G 59/58 (2006.01); C08L 63/00 (2006.01); H01B 3/40 (2006.01); H01B 13/14 (2006.01)
CPC C08G 59/5073 (2013.01) [C08G 59/58 (2013.01); C08L 63/00 (2013.01); H01B 3/40 (2013.01); H01B 13/148 (2013.01); C08L 2201/02 (2013.01); C08L 2203/202 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An electrical device having at least one cross-linked layer obtained from an olefin polymer composition comprising:
at least one olefin polymer comprising one or more epoxy function(s), and
at least one cross-linking agent,
wherein the cross-linking agent is
a mixture of:
an imidazole of formula (I)

OG Complex Work Unit Chemistry
wherein R1 and R2 independently represent a hydrogen atom or a hydrocarbon group, R3 and R4 independently represent a hydrogen atom or a hydrocarbon group, or R3 and R4 form, together with the carbon atoms of the imidazole ring to which they are attached, a ring, wherein the polymer composition comprises no more than 0.5 parts by weight of imidazole of formula (I) per 100 parts by weight of polymer(s) in the polymer composition,
a non-aromatic cyclic amine, wherein the polymer composition comprises no more than 1.0 parts by weight of non-aromatic cyclic amine per 100 parts by weight of polymer(s) in the polymer composition, and
a cross-linking co-agent comprising at least one reactive function capable of reacting with the epoxy function of said polymer, said cross-linking co-agent selected from amino acid, a polymer carboxylic acid, and non-polymer carboxylic acid,
wherein the polymer composition comprises no more than 0.7 parts by weight of cross-linking co-agent per 100 parts by weight of polymer(s) in the polymer composition if the cross-linking co-agent is the amino acid,
wherein the polymer composition comprises no more than 3.15 parts by weight of cross-linking co-agent per 100 parts by weight of polymer(s) in the polymer composition if the cross-linking co-agent is the polymer carboxylic acid,
wherein the polymer composition comprises no more than 5.0 parts by weight of cross-linking co-agent per 100 parts by weight of polymer(s) in the polymer composition if the cross-linking co-agent is the non-polymer carboxylic acid.