Polyimide precursor solution, coating film obtained therefrom, a

Details Polyimide precursor solution, coating film obtained therefrom, a Polyimide precursor solution, coating film obtained therefrom, a

1998-06-23

2000-10-17

Hightower, P. Hampton

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528126, 528128, 528170, 528171, 528172, 528173, 528176, 528183, 528185, 528188, 528220, 528229, 528332, 528350, 528174, 4284735, C08G 7310, C08G 6926

Patent

active

061334073

ABSTRACT:
A polyimide precursor solution having a high concentration yet low viscosity, a polyimide coating film having satisfactory physical properties which is prepared from the polyimide precursor solution, and a process for producing a polyimide coating film using the polyimide precursor solution. The polyimide precursor solution has dissolved therein a specific salt of a diamine and a tetracarboxylic acid and/or a dicarboxylic acid-dialkyl ester in a high concentration, the diamine and the tetracarboxylic acid and/or the dicarboxylic acid-dialkyl ester being capable of forming a polyimide. Also disclosed is a polyimide coating film obtained by heating the solution to cause imidization and a process for producing the polyimide coating film.

REFERENCES:
patent: 5025084 (1991-06-01), Dobinson et al.
patent: 5032667 (1991-07-01), Harris et al.
patent: 5112942 (1992-05-01), Blocker
patent: 5686559 (1997-11-01), Rhee et al.
patent: 5844065 (1998-12-01), Liaw et al.
patent: 5854380 (1998-12-01), Seto et al.
patent: 5866676 (1999-02-01), Jensen

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