Polyimide precursor solution process for the production thereof

Details Polyimide precursor solution process for the production thereof Polyimide precursor solution process for the production thereof

1997-06-05

1998-12-29

Hampton-Hightower, P.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528126, 528128, 528170, 528172, 528173, 528176, 528184, 528220, 528224, 528229, 528310, 528322, 528350, C08G 6926, C08G 7310

Patent

active

058543805

ABSTRACT:
This invention provides a polyimide precursor solution having high concentration and low viscosity and a production process thereof, and polyimide coatings and films having excellent physical properties obtained therefrom and a production process thereof. Particularly, it relates to a polyimide precursor solution which contains a salt of a specific diamine with a specific tetracarboxylic acid, as its solute; to a process for the production of the polyimide precursor solution, which comprises allowing 1 mole of a specified diamine to react with 0.3 to 0.9 mole of a specific tetracarboxylic acid dianhydride, thereby obtaining a diamine, and subsequently adding 0.95 to 1.05 moles of a specified tetracarboxylic acid to 1 mole of the thus obtained diamine; to a polyimide coating or film obtained from the aforementioned polyimide precursor solution; and to a process for the production of the polyimide coating or film, which comprises coating the aforementioned polyimide precursor solution on a substrate and heating the coat to effect imidization.

REFERENCES:
patent: 5352037 (1994-10-01), Rhee et al.

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