	US 11,884,787 B2
	PBI films formed without use of organic solvents
Laura A. Murdock, Columbia, SC (US); Lihui Wang, West Columbia, SC (US); Fei Huang, West Columbia, SC (US); and Brian C. Benicewicz, Columbia, SC (US)
Assigned to UNIVERSITY OF SOUTH CAROLINA, Columbia, SC (US)
Filed by UNIVERSITY OF SOUTH CAROLINA, Columbia, SC (US)
Filed on Nov. 9, 2021, as Appl. No. 17/522,160.
Application 17/522,160 is a continuation of application No. 16/569,983, filed on Sep. 13, 2019, granted, now 11,180,621.
Claims priority of provisional application 62/731,156, filed on Sep. 14, 2018.
Claims priority of provisional application 62/731,152, filed on Sep. 14, 2018.
Prior Publication US 2022/0064391 A1, Mar. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 5/22 (2006.01); B01D 67/00 (2006.01)

CPC C08J 5/2256 (2013.01) [B01D 67/0011 (2013.01); B01D 67/0013 (2013.01); B01D 67/0093 (2013.01); B01D 2323/30 (2013.01); B01D 2323/40 (2013.01); B01D 2325/02 (2013.01); B01D 2325/42 (2013.01); C08J 2379/04 (2013.01)]

15 Claims

1. A dried polybenzimidazole (PBI) film exhibiting a tensile stress at break of at least 25 MPa and a VOSO₄permeability of from 2.6×10⁻⁹cm²/s to 4.89×10⁻⁷cm²/s, wherein the dried PBI film includes a crosslinked polybenzimidazole that includes one or more of the following repeating units: