Poly amic acid system for polyimides

   
   

A poly amic acid precursor containing a combination of tetrahydrofuran and N-methylpyrrolidinone as cosolvents is described. Utilizing the combination of tetrahydrofuran and N-methylpyrrolidinone allows for the removal of significant portions of the solvent during the formation of the polyimide. The removal of tetrahydrofuran and N-methylpyrrolidinone can be done without the use of preheating zones so as to allow for the large scale production of polyimide articles.

Un precursor ácido amic poly que contiene una combinación del tetrahydrofuran y N-methylpyrrolidinone como cosolvents se describe. Utilizar la combinación del tetrahydrofuran y de N-methylpyrrolidinone permite el retiro de las porciones significativas del solvente durante la formación del polyimide. El retiro del tetrahydrofuran y de N-methylpyrrolidinone se puede hacer sin el uso de las zonas de precalientamiento para tener en cuenta la producción de la escala grande de los artículos del polyimide.

 
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