Polyamic-acids prepared from 3,3,4,4-benzhydrol tetracarboxylic

Details Polyamic-acids prepared from 3,3,4,4-benzhydrol tetracarboxylic Polyamic-acids prepared from 3,3,4,4-benzhydrol tetracarboxylic

1974-12-19

1976-02-17

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 302, 260 308R, 260 308DS, 260 326N, 260 37N, 260 47CP, 260 63R, 260 78TF, 428458, 428474, C08G 7310

Patent

active

039391094

ABSTRACT:
A novel polyamic acid intermediate composition in a polar, aprotic solvent and the corresponding fully condensed polyimide are prepared from 3,3',4,4'-benzhydrol tetracarboxylic dianhydride and a diamine having at least two carbon atoms such as bis(4-aminophenyl)ether.

REFERENCES:
patent: 3609123 (1971-09-01), Rabilloud et al.
patent: 3793291 (1974-02-01), Giuliani et al.

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