Polybenzimidazole compounds in solution and a process for...

Details Polybenzimidazole compounds in solution and a process for... Polybenzimidazole compounds in solution and a process for...

C - Chemistry, Metallurgy

08

L

C08L 79/04 (2006.01) C08G 73/18 (2006.01)

Patent

CA 2209079

Improved process for producing a polybenzimidazole compound in solution by dissolving a fully dried polybenz-imidazole of the following general formula (1) or (2) in N,N--dimethylacetamide of a sufficiently reduced water content at an elevated temperature of 260°C or higher in an inert gas atmosphere and a solution of the polybenzimidazole compound produced by the process. The solution remains useful for an extended time without using metal salts or any other stabilizers: (see formulas 1 and 2) where R1, R2 and R5 are tetra-, di- and trivalent aromatic groups, respectively; R3, R4 and R6 are each independently a hydrogen atom, an alkyl group or an aryl group; n is an integer of 2 or more.

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