Accession Number : ADD001695

Title :   Preparation of Polybenzimidazoles.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Arnold,Fred E

Report Date : 26 Aug 1975

Pagination or Media Count : 5

Abstract : This invention covers a process for preparing polybenzimidazoles. Aromatic bis-orthoaminosulfonamides and aromatic dicarboxylic acids or derivatives thereof are polymerized in polyphosphoric acid. The process provides thermally stable heterocyclic polymers of very high molecular weight that are especially useful in forming films and fibers.

Descriptors :   *Patents, *Synthesis(Chemistry), *Heat resistant plastics, *Polymerization, Benzimidazoles, Monomers, Thermal stability, Polymeric films, Sulfonamides, Carboxylic acids, Fibers, Molecular weight

Subject Categories : Polymer Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE