US 12,087,976 B2
Compositions for bipolar plates and processes for manufacturing said compositions
Stéphane Bizet, Serquigny (FR); and Jérôme Chauveau, Serquigny (FR)
Assigned to Arkema France, Colombes (FR)
Appl. No. 17/277,369
Filed by Arkema France, Colombes (FR)
PCT Filed Sep. 18, 2019, PCT No. PCT/FR2019/052174
§ 371(c)(1), (2) Date Mar. 18, 2021,
PCT Pub. No. WO2020/058626, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 1858597 (FR), filed on Sep. 21, 2018.
Prior Publication US 2022/0037677 A1, Feb. 3, 2022
Int. Cl. H01M 8/0226 (2016.01); B29C 45/00 (2006.01); C08J 3/12 (2006.01); C08J 3/20 (2006.01); C08K 3/04 (2006.01); H01M 8/0213 (2016.01); H01M 8/0221 (2016.01); H01M 8/18 (2006.01); B29K 27/00 (2006.01); B29K 105/00 (2006.01); B29L 31/34 (2006.01)
CPC H01M 8/0226 (2013.01) [B29C 45/0001 (2013.01); C08J 3/12 (2013.01); C08J 3/201 (2013.01); C08J 3/203 (2013.01); C08K 3/04 (2013.01); H01M 8/0213 (2013.01); H01M 8/0221 (2013.01); H01M 8/184 (2013.01); B29K 2027/16 (2013.01); B29K 2105/0023 (2013.01); B29L 2031/3468 (2013.01); C08J 2327/16 (2013.01); C08K 2201/001 (2013.01); C08K 2201/014 (2013.01)] 13 Claims
 
1. A process for manufacturing a composition, comprising the following steps:
mixing a molten thermoplastic fluoropolymer with a first conductive filler so as to obtain a conductive fluoropolymer;
milling said conductive fluoropolymer to reduce it to powder having a volume-mean diameter (Dv50) ranging from 10 μm to 1 mm;
mixing the conductive fluoropolymer powder with a second conductive filler, wherein the first conductive filler is present in an amount ranging from 0.1% to 8%, based on the weight of the conductive fluoropolymer composition, and
wherein the second conductive filler is present in an amount ranging from 40% to 90%, based on the total weight of the composition.