Process for producing polyisoimide

摘要

The present invention provides a dehydrating agent which is less poisonous and which can be easily handled in producing a polyisoimide by dehydrating a polyamic acid. A process is also provided for producing a polyisoimide without requiring the separation of by-products. That is, the process for producing the polyisoimide of the present invention includes the step of using a dihyroquinoline derivative represented by the formula (* CHEMICAL STRUCTURE *) (1) (wherein each R1 and R2 is independently a monovalent organic group having 1 to 8 carbon atoms) as the dehydrating agent in producing the polyisoimide by dehydrating the polyamic acid.