Aromatic polyimide film and its precursor composition

Details Aromatic polyimide film and its precursor composition Aromatic polyimide film and its precursor composition

1997-10-29

1999-04-06

Hampton-Hightower, P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528172, 528173, 528179, 528183, 528220, 528229, 528322, 528350, 528353, 4284735, C03G 7310

Patent

active

058919864

ABSTRACT:
An aromatic polyimide precursor composition advantageously employable for the production of an amorphous aromatic polyimide film having Tg of 300.degree. C. or higher is composed of an aromatic tetracarboxylic acid component and an aromatic diamine component which are dissolved in an organic solvent, in which at least 60 mol. % of the aromatic tetracarboxylic acid component is 2,3,3',4'-bi-phenyltetracarboxylic acid, its monoester or diester of a primary alcohol, or their mixture, and at least 55 mol. % of the aromatic diamine component is 4,4'-diaminodiphenyl ether.

REFERENCES:
patent: 4696994 (1987-09-01), Nakajima et al.
patent: 4778872 (1988-10-01), Sasaki et al.
patent: 5686525 (1997-11-01), Maruta et al.
patent: 5719253 (1998-02-01), Echigo et al.

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