Accession Number : ADD003576

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 : 11 Jan 1977

Pagination or Media Count : 5

Abstract : A process for preparing polybenizimidazoles is disclosed in which 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. (Author)

Descriptors :   *Patents, *Benzimidazoles, *Polymers, *Synthesis(Chemistry), Molecular weight, Thermal stability, Sulfonamides, Carboxylic acids, Polymerization, films, Synthetic fibers, Heat resistant plastics

Subject Categories : Polymer Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE