US 11,851,508 B2
Acid-type sulfonic acid group-containing polymer, liquid composition, polymer electrolyte membrane, membrane electrode assembly, polymer electrolyte fuel cell and ion exchange membrane for water electrolysis
Takeshi Hirai, Tokyo (JP); Susumu Saito, Tokyo (JP); Hiroyuki Watabe, Tokyo (JP); Chikaya Tamitsuji, Tokyo (JP); and Daisuke Jomuta, Tokyo (JP)
Assigned to AGC Inc., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on May 26, 2021, as Appl. No. 17/330,788.
Application 17/330,788 is a continuation of application No. PCT/JP2019/047936, filed on Dec. 6, 2019.
Claims priority of application No. 2018-230213 (JP), filed on Dec. 7, 2018.
Prior Publication US 2021/0301044 A1, Sep. 30, 2021
Int. Cl. C08F 16/30 (2006.01); B01J 39/05 (2017.01); B01J 39/20 (2006.01); C08J 5/22 (2006.01); C25B 1/04 (2021.01); C25B 13/08 (2006.01); H01M 8/1004 (2016.01); H01M 8/1023 (2016.01); H01M 8/1039 (2016.01); H01M 8/1067 (2016.01); H01M 8/10 (2016.01)
CPC C08F 16/30 (2013.01) [B01J 39/05 (2017.01); B01J 39/20 (2013.01); C08J 5/2231 (2013.01); C25B 1/04 (2013.01); C25B 13/08 (2013.01); H01M 8/1004 (2013.01); H01M 8/1023 (2013.01); H01M 8/1039 (2013.01); H01M 8/1067 (2013.01); C08J 2329/10 (2013.01); H01M 2008/1095 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An acid-type sulfonic acid group-containing polymer comprising perfluoromonomer units, no monomer units having a halogen atom other than a fluorine atom, and acid type sulfonic acid groups, said polymer having a hydrogen gas permeability coefficient under conditions of a temperature of 80° C. and a relative humidity of 10%, of at most 2.5×10−9 cm3·cm/(s·cm2·cmHg) and a mass reduction rate when immersed in hot water at 120° C. for 24 hours of at most 15 mass %,
wherein said acid-type sulfonic acid group-containing polymer comprises units represented by the following formula u1 as the perfluoromonomer units:

OG Complex Work Unit Chemistry
where RF1 sand RF2 are each independently a C1-3 perfluoroalkylene group.