Polybenzimida zoquinazolines and prepolymers for making same

Details Polybenzimida zoquinazolines and prepolymers for making same Polybenzimida zoquinazolines and prepolymers for making same

1975-02-07

1977-04-12

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 465E, 260 47CP, 260 49, 260 63R, 260 7841, 428411, 428474, C08G 7300, C08G 7318

Patent

active

040174662

ABSTRACT:
Highly cross-linked, infusible, poly(benzimidazoquinazolines) are made by heat polymerizing fusible condensation prepolymers and pre-copolymers which, in turn, are made by the melt condensation of bis-2(o-aminoaryl)imidazoles with (a) aryl esters of extended aromatic carboxylic acids having a carboxyl functionality greater then two or (b) a mixture of the latter acid esters and aryl esters of aromatic dicarboxylic acids, respectively. The prepolymers and pre-copolymers may be employed to form laminates, molded articles, etc., having high strength and high temperature characteristics.

REFERENCES:
patent: 3503929 (1970-03-01), Loudas
patent: 3546166 (1970-12-01), Rabilloud et al.
patent: 3575941 (1971-04-01), Steinberg

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