Search International and National Patent Collections

1. (WO2014197413) METHOD OF MAKING POLYBENZIMIDAZOLE

Pub. No.:    WO/2014/197413    International Application No.:    PCT/US2014/040590
Publication Date: Fri Dec 12 00:59:59 CET 2014 International Filing Date: Wed Jun 04 01:59:59 CEST 2014
IPC: C08G 73/18
Applicants: PBI PERFORMANCE PRODUCTS, INC.
Inventors: BENICEWICZ, Brian, C.
GULLEDGE, Alexander, Lanier
STECKLE, Jr., Warren, P.
COPELAND, Gregory, S.
DAWKINS, Bobby, G.
Title: METHOD OF MAKING POLYBENZIMIDAZOLE
Abstract:
A method of making a polybenzimidazole (PBI) includes the steps of: reacting, in a solution, an organic compound having at least 2 amino groups with an organic aldehyde adduct, the reactants comprise at least 8% by weight of the solution. A solvent of the solution may be selected from the group of: N, N-dimethylacetamide (DMAc), N, N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), tetramethylene sulfone, and combinations thereof. The organic aldehyde adduct may be an organic aldehyde bisulfite adduct. The organic aldehyde portion of the organic aldehyde adduct being aliphatic, alicyclic, aromatic, heterocyclic, or heteroaromatic aldehyde or mixtures thereof. The polybenzimidazole may have an intrinsic viscosity of at least 0.40 dl/g.