Production of particulate BBB type polymer having an unusually h

Details Production of particulate BBB type polymer having an unusually h Production of particulate BBB type polymer having an unusually h

1973-12-14

1976-07-13

Schofer, Joseph L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 6928, C08G 6932

Patent

active

039693252

ABSTRACT:
An improved process is provided for the formation of BBB type polymer, i.e. poly(bisbenzimidazobenzophenanthroline) and related nitrogenous polymers, in finely divided form having an unusually high surface area. The condensation reaction of at least one organic tetra-amine and at least one tetracarboxylic acid (which optionally may be in the form of the corresponding half anhydride or dianhydride) is conducted at an elevated temperature with agitation in the presence of a major concentration of a liquid sulfone (e.g. diphenyl sulfone) which is inert under the reaction conditions. The resulting particulate product of BBB type polymer commonly exhibits a surface area of about 100 to 500, or more, square meters per gram, and may be used in the formation of pressure molded articles of high temperature resistance.

REFERENCES:
patent: 3784517 (1974-01-01), Hedberg et al.
patent: 3804804 (1974-04-01), Gerber et al.

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